阅读说明：本技术 一种螺旋式气液分离器 (Spiral gas-liquid separator ) 是由 赵富龙 周娅 何宇豪 赵佳音 谭思超 黄笛 卢瑞博 余霖 于 2019-10-15 设计创作，主要内容包括：本发明提供一种螺旋式气液分离器,包括柱状的筒体,筒体的上、下端面上设有流体出口、流体入口,沿筒体内圆周的切向设置有螺旋流道,螺旋流道自流体入口贯通延伸至流体出口,螺旋流道包括外轮廓和内轮廓,沿流道延伸方向外轮廓与筒体的外圆周壁具有平行边形式,内轮廓与外轮廓同轴并逐渐向外轮廓靠近；筒体底部套设有汇水槽,汇水槽上布设有疏水管；与外轮廓相切的筒体1侧壁上间隔布设有多级液相引出孔,对应地,筒体1外沿径向自内而外逐层套设有多重导流罩,使形成沿径向自内而外逐层套设的多级导流腔,每一导流腔的上端封闭、下端敞口并从液相引出孔延伸至汇水槽的上液面。该螺旋式气液分离器结构简单、设计合理、运行可靠、且分离效率高。(The invention provides a spiral gas-liquid separator, which comprises a cylindrical barrel, wherein the upper end surface and the lower end surface of the barrel are provided with a fluid outlet and a fluid inlet, a spiral flow passage is arranged along the tangential direction of the inner circumference of the barrel, the spiral flow passage runs through from the fluid inlet to the fluid outlet, the spiral flow passage comprises an outer contour and an inner contour, the outer contour and the outer circumferential wall of the barrel are in a parallel edge form along the extension direction of the flow passage, and the inner contour is coaxial with the outer contour and gradually approaches to the outer contour; the bottom of the cylinder is sleeved with a water collecting groove, and a drain pipe is arranged on the water collecting groove; the side wall of the cylinder body 1 tangent to the outer contour is provided with a plurality of liquid phase lead-out holes at intervals, correspondingly, the outer edge of the cylinder body 1 is sleeved with a plurality of flow guide covers layer by layer from inside to outside along the radial direction, so that a plurality of flow guide cavities sleeved layer by layer from inside to outside along the radial direction are formed, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is open, and the flow guide cavities extend to the upper liquid level of the water collecting tank from the. The spiral gas-liquid separator has the advantages of simple structure, reasonable design, reliable operation and high separation efficiency.)

1. The utility model provides a spiral vapour and liquid separator, includes cylindrical barrel, correspond on the up end of barrel, the lower terminal surface and be equipped with fluid outlet, fluid inlet, its characterized in that: a spiral flow passage is arranged along the tangential direction of the inner circumference of the cylinder body, the spiral flow passage penetrates and extends from the fluid inlet to the fluid outlet, the spiral flow passage comprises an outer contour and an inner contour, the outer contour and the outer circumferential wall of the cylinder body are in a parallel edge form along the extension direction of the flow passage, the inner contour and the outer contour are coaxial and gradually approach to the outer contour, and the flow area of the spiral flow passage is gradually reduced along the extension direction of the flow passage; a disc-shaped water collecting tank is sleeved on the outer circumferential wall of the bottom of the cylinder body, and a drain pipe for controlling the height of the upper liquid level of the water collecting tank is distributed on the outer edge of the water collecting tank; the multi-stage liquid phase extraction holes penetrating through the side wall are arranged on the side wall of the cylinder body tangent to the outer contour at intervals, multiple flow guide covers are sleeved on the outer circumference of the cylinder body layer by layer from inside to outside along the radial direction, so that annular multi-stage flow guide cavities are formed between the cylinder body and the adjacent flow guide covers and between the two adjacent flow guide covers and are sleeved layer by layer from inside to outside along the radial direction, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is open, and the flow guide cavities extend to the upper liquid level of the water collection tank from the liquid phase extraction holes.

2. The spiral gas-liquid separator of claim 1, wherein: first, second, third and fourth-stage liquid phase extraction holes are arranged on the side wall of the cylinder tangent to the outer contour at equal intervals from the fluid inlet end, so that the fourth-stage liquid phase extraction holes are circumferentially and symmetrically distributed along the spiral flow channel; and correspondingly to each stage of liquid phase lead-out holes, the outer circumference of the cylinder is sleeved with a first flow guide cover, a second flow guide cover, a third flow guide cover and a fourth flow guide cover layer by layer from inside to outside along the radial direction, so that a first flow guide cavity, a second flow guide cavity, a third flow guide cavity and a fourth flow guide cavity which are sleeved with each other layer by layer from inside to outside along the radial direction are formed between the cylinder and the first flow guide cover, between the first flow guide cover and the second flow guide cover, between the second flow guide cover and the third flow guide cover and between the third flow guide cover and the fourth flow guide cover, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is.

3. The spiral gas-liquid separator of claim 2, wherein: the lower ports of the first flow guide cavity, the second flow guide cavity, the third flow guide cavity and the fourth flow guide cavity are equal in distance or gradually reduced from inside to outside along the radial direction.

4. The spiral gas-liquid separator of claim 3, wherein: the number of holes of the first-stage liquid phase extraction hole close to the fluid inlet end in the first, second, third and fourth liquid phase extraction holes is greater than or equal to that of the first-stage liquid phase extraction hole close to the fluid outlet end;

the aperture of the first-stage liquid phase extraction hole close to the fluid inlet end in the first, second, third and fourth liquid phase extraction holes is smaller than or equal to the aperture of the first-stage liquid phase extraction hole close to the fluid outlet end.

5. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the number of spiral cycles of the spiral channel is two to four.

6. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the cross-sectional area ratio of the fluid outlet to the fluid inlet is 1-10.

7. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the liquid phase lead-out hole is arranged to horizontally penetrate through the side wall of the barrel body 1 along the radial direction, or is inclined downwards towards the outer side of the barrel body to penetrate through the side wall of the barrel body 1.

8. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the drain pipe is a drain ring pipe, the input end of the drain ring pipe is positioned at the downstream of the upper liquid level of the water collecting tank, the output end of the drain ring pipe extends out along the tangential direction of the outer periphery of the water retaining edge and is annularly arranged at the outer periphery of the water collecting tank, and the outlet of the drain ring pipe is positioned at the upstream of the upper liquid level of the water collecting tank; or the drain pipe comprises a ball valve and a flowmeter and is used for automatically controlling the liquid flow of the water collection tank so as to drain when the upper liquid level of the water collection tank is higher than the lower port of the flow guide cavity.

9. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the cylinder body comprises a hollow outer cylinder body and an inner cylinder body, wherein an inner circular wall of the outer cylinder body is provided with an inner concave outer spiral groove, an outer circular wall of the inner cylinder body is provided with an inner concave inner spiral groove, the inner circular wall of the outer cylinder body is connected with the outer circular wall of the inner cylinder body in an assembling mode to form the sealed spiral channel, the outer periphery of the outer spiral groove forms the outer contour of the spiral channel, and the outer periphery of the inner spiral groove forms the inner contour of the spiral channel.

10. The spiral gas-liquid separator as recited in any one of claims 1 to 4, wherein: the cross section of the spiral flow channel is rectangular, trapezoidal, circular or other arc shapes.

Technical Field

The invention relates to a spiral gas-liquid separator, and belongs to the technical field of gas-liquid separation.

Background

The gas-liquid separator is not only widely applied to various industrial and civil application occasions such as gas dust removal, oil-water separation, liquid impurity removal and the like, but also plays an important role in the fields of gas phase demisting after a condensation cooler at the top of a fractionating tower, gas phase demisting of various gas water washing towers, absorption towers and desorption towers and gas-water separation in a steam generator of a nuclear power plant. Particularly, the steam-water separator belongs to a gas-liquid separator, is used for removing water drops carried in saturated steam, provides steam with qualified dryness for a steam generator turbine, and directly influences the operation reliability and the high efficiency of a nuclear power station by the steam-water separation performance of the steam-water separator.

At present, most steam-water separation devices are applied in a steam generator of a nuclear power plant, and comprise a traditional cyclone separator, a rotary vane separator, a corrugated plate separator and the like. The traditional cyclone separator adopts the traditional spiral pipe design, and has the problems of low structural strength and low running reliability although the structure is simple. And because more auxiliary equipment is involved in the structural design of the rotary vane type and corrugated plate type steam-water separator, the problems of relatively complex structure, large occupied space and low separation efficiency caused by easy generation of secondary liquid drops exist, and the application requirements of power increase in the evaporator of a commercial nuclear power station and space compactness in a marine or offshore nuclear power device cannot be met. Although the existing combined separator combines various separation principles to realize multiple and high-efficiency separation, the design and processing process are complex, the cost is high, and the wide applicability is not realized. Similar conditions exist in other fields of gas-liquid separators.

Disclosure of Invention

The invention aims to solve the technical problems that the existing gas-liquid separator is complex in structure, poor in separation effect and easy to cause liquid drops to be carried in outlet gas, and provides the spiral gas-liquid separator which is simple in structure, reasonable in design, reliable in operation and high in separation efficiency.

The purpose of the invention is realized as follows: the upper end surface and the lower end surface of the cylinder body are correspondingly provided with a fluid outlet and a fluid inlet, a spiral flow passage is arranged along the tangential direction of the inner circumference of the cylinder body, the spiral flow passage penetrates through the fluid inlet and extends to the fluid outlet, the spiral flow passage comprises an outer contour and an inner contour, the outer contour and the outer circumferential wall of the cylinder body are in a parallel edge form along the extension direction of the flow passage, the inner contour and the outer contour are coaxial and gradually approach to the outer contour, and the flow area of the spiral flow passage is gradually reduced along the extension direction of the flow passage; a disc-shaped water collecting tank is sleeved on the outer circumferential wall of the bottom of the cylinder, and a drain pipe for controlling the height of the upper liquid level of the water collecting tank is distributed on the outer edge of the water collecting tank; the multi-stage liquid phase leading-out holes penetrating through the side wall are arranged on the side wall of the cylinder body tangent to the outer contour at intervals, multiple flow guide covers are sleeved on the outer circumference of the cylinder body layer by layer from inside to outside along the radial direction, so that annular multi-stage flow guide cavities are formed between the cylinder body and the adjacent flow guide covers and between the two adjacent flow guide covers and are sleeved layer by layer from inside to outside along the radial direction, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is open, and the flow guide cavities extend to the upper liquid level of the water collecting tank from the liquid phase leading-out holes.

The invention also includes such structural features:

1. first, second, third and fourth stage liquid phase extraction holes are arranged on the side wall of the cylinder tangent to the outer contour at equal intervals from the fluid inlet end, so that the fourth stage liquid phase extraction holes are circumferentially and symmetrically distributed along the spiral flow channel; and correspondingly to each stage of liquid phase lead-out holes, the outer circumference of the cylinder is sleeved with a first flow guide cover, a second flow guide cover, a third flow guide cover and a fourth flow guide cover layer by layer from inside to outside along the radial direction, so that a first flow guide cavity, a second flow guide cavity, a third flow guide cavity and a fourth flow guide cavity which are sleeved with each other layer by layer from inside to outside along the radial direction are formed between the cylinder and the first flow guide cover, between the first flow guide cover and the second flow guide cover, between the second flow guide cover and the third flow guide cover and between the third flow guide cover and the fourth flow guide cover, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is open.

2. The lower ports of the first flow guide cavity, the second flow guide cavity, the third flow guide cavity and the fourth flow guide cavity are equal in distance or gradually reduced from inside to outside along the radial direction.

3. The number of holes of the first-stage liquid phase extraction hole close to the fluid inlet end in the first, second, third and fourth liquid phase extraction holes is larger than or equal to the number of holes of the first-stage liquid phase extraction hole close to the fluid outlet end;

the aperture of the first-stage liquid phase extraction hole close to the fluid inlet end in the first, second, third and fourth liquid phase extraction holes is smaller than or equal to the aperture of the first-stage liquid phase extraction hole close to the fluid outlet end.

4. The number of spiral cycles of the spiral channel is two to four.

5. The cross-sectional area ratio of the fluid outlet to the fluid inlet is 1-10.

6. The liquid phase lead-out hole is arranged to horizontally penetrate through the side wall of the cylinder 1 along the radial direction, or is inclined downwards to penetrate through the side wall of the cylinder 1 towards the outer side of the cylinder.

7. The drain pipe is a drain ring pipe, the input end of the drain ring pipe is positioned at the downstream of the upper liquid level of the water collecting tank, the output end of the drain ring pipe extends out along the tangential direction of the outer periphery of the water retaining edge and is annularly arranged at the outer periphery of the water collecting tank, and the outlet of the drain ring pipe is positioned at the upstream of the upper liquid level of the water collecting tank; or the drain pipe comprises a ball valve and a flowmeter and is used for automatically controlling the liquid flow of the water collection tank so as to drain when the upper liquid level of the water collection tank is higher than the lower port of the flow guide cavity.

8. The barrel comprises a hollow outer barrel and an inner barrel, wherein an inner circular wall of the outer barrel is provided with an inner concave outer spiral groove, an outer circular wall of the inner barrel is provided with an inner concave inner spiral groove, the inner circular wall of the outer barrel is connected with the outer circular wall of the inner barrel in an assembling mode to form the sealed spiral channel, the outer periphery of the outer spiral groove forms the outer contour of the spiral channel, and the outer periphery of the inner spiral groove forms the inner contour of the spiral channel.

9. The cross section of the spiral flow channel is rectangular, trapezoidal, circular or other arc shapes.

Compared with the prior art, the invention has the beneficial effects that: when the spiral gas-liquid separator is used for gas-liquid separation, a gas-liquid mixture (namely fluid) with a certain speed enters the spiral flow channel from the fluid inlet along the tangential direction of the cylinder, and moves upwards in a spiral direction of the spiral flow channel to generate centrifugal force, so that liquid drops with large centrifugal force are thrown to the outer contour side of the spiral flow channel to form outer liquid phase rotational flow, and gas phase with small centrifugal force is concentrated at the central part of the spiral flow channel to form inner gas phase rotational flow. Along with the gradual reduction of the flow area of the gas-liquid mixture along the spiral flow channel, the flow velocity of the gas phase and the liquid phase is constantly increased, namely the inertial centrifugal action of the liquid drop phase in the gas phase is constantly enhanced, so that the liquid drop in the gas phase rotational flow is constantly separated and thrown to the outer contour wall under the constantly enhanced centrifugal action to form a liquid film/liquid phase, one part of the liquid film/liquid phase is gradually led out through the multi-stage liquid phase leading-out hole and then matched with the corresponding flow guide cover, and the led-out liquid forms outer-layer descending rotational flow along the flow guide cavity, finally is collected to a water collection groove and is discharged out of the separator through; the other part of the gas phase continuously flows back to the fluid outlet at the bottom of the cylinder along the spiral flow channel to be discharged out of the separator, and the gas phase rotational flow at the central part of the spiral flow channel continuously rises to the top, and finally is discharged out of the separator from the fluid outlet to enter gas utilization equipment.

1. The spiral flow channel on the inner circumference of the cylinder body is integrally formed with the cylinder body, the integral structure is simple, the operation is reliable, the high separation efficiency is realized, the complex structure of the traditional multistage gas-liquid separator is omitted, the processing and manufacturing difficulty of the separator structure is reduced, and the risk that the single component fails to reduce the operation efficiency of the unit is reduced;

2. the invention adopts the tangentially arranged fluid inlet and spiral flow passage structure, effectively reduces the turbulence effect of the fluid at the inlet and in the spiral flow passage, and reduces the pressure loss at the inlet and in the liquid flow direction; the flow guide cover structure design is adopted to provide an independent flow guide cavity capable of sealing gas and discharging liquid for each liquid phase lead-out hole, so that the gas phase loss and the pressure drop loss are further reduced, and the spiral period number, the structure change parameters and the mode of the spiral flow channel are reasonably designed, so that the separation efficiency is greatly improved;

3. according to the invention, the multistage liquid phase lead-out holes are arranged at intervals, so that the liquid film on the outer contour wall of the spiral flow channel can be timely and fully discharged, the situation that the separation efficiency is reduced due to liquid heavy mixing is reduced, compared with the situation that a large-range liquid phase outlet section is arranged in the traditional separator, the number of holes is effectively reduced, the processing amount is reduced, and the pressure drop loss is reduced;

4. in the invention, by adopting the structure design of the multiple flow guide covers, an independent flow guide cavity is provided for each liquid phase lead-out hole, so that the condition that the gas phase is serially connected among multiple stages of liquid phase lead-out holes to reduce the flow velocity and cause the reduction of the gas-liquid separation efficiency is avoided; and, the descending liquid phase/liquid film discharged from the upper liquid phase lead-out hole is reduced or eliminated, the lower liquid phase lead-out hole is blocked, the liquid phase can not be discharged in time, the conditions of gas-liquid remixing and separation efficiency reduction are caused, and finally, multiple and high-efficiency gas-liquid separation is automatically realized;

5. according to the invention, the group number, the number and the aperture size of the liquid phase lead-out holes at the fluid inlet end are increased, and the distance between the liquid discharge ports at the lower end of the inner diversion cavity is increased, so that the liquid discharge capacity of the liquid phase lead-out holes and the diversion cavity at the fluid inlet end can be improved, the liquid phase in the spiral channel close to the fluid inlet end can be discharged fully and timely, and the separation effect is further improved.

Drawings

FIG. 1 is a schematic perspective view of a spiral gas-liquid separator according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the inner and outer contours of the spiral flow channel of FIG. 1;

FIG. 3 is a front view (broken lines indicate cross-sectional structures) of the structure of FIG. 1;

FIG. 4 is a right side view (broken lines indicate cross-sectional structures) of the structure of FIG. 1;

FIG. 5 is a top view of the structure of FIG. 1 (with dashed lines indicating cross-sectional structures);

fig. 6 is a bottom view of the structure of fig. 1 (with dashed lines indicating a cross-sectional structure).

In the figure: 1 cylinder, 11 fluid inlet, 12 fluid outlet, 2 spiral flow channel, 21 external contour, 22 internal contour, 3 liquid phase leading-out hole, 31 first liquid phase leading-out hole, 32 second liquid phase leading-out hole, 33 third liquid phase leading-out hole, 34 fourth liquid phase leading-out hole, 4 air guide sleeve, 41 first air guide sleeve, 42 second air guide sleeve, 43 third air guide sleeve, 44 fourth air guide sleeve, 401 first air guide cavity, 402 second air guide cavity, 403 third air guide cavity, 404 fourth air guide cavity, 5 water collecting groove and 6 drain pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is made with reference to an embodiment of the present invention and the accompanying drawings. The embodiments described by reference to the drawings, i.e. the steam-water separator in the steam generator of the nuclear power plant, are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention. The method described herein may also be applied to other gas-liquid separation applications, including fuel oil spraying for internal combustion engines, gas phase demisting at the air outlet of compressors, gas phase demisting after condensing coolers at the top of fractionating columns, gas phase demisting for various gas washing columns, absorption columns and desorption columns, etc. In this embodiment, the gas-liquid phase mixture refers to a mixture composed of a liquid phase component having a relatively high density and a gas phase component gun having a relatively low density, the liquid phase or the liquid droplets refer to water droplets, and the gas phase or the gas refers to a mixture of air and water vapor.

The spiral gas-liquid separator in the embodiment of the invention is shown in fig. 1-6, and comprises a cylindrical barrel 1, wherein a spiral flow passage 2 is arranged in the barrel 1 along the tangential direction of the inner circumference of the barrel, and the spiral flow passage 2 penetrates through the upper end surface of the barrel 1 to extend to the lower end surface of the barrel 1 and penetrates through the upper end surface and the lower end surface of the barrel 1 to form a fluid outlet 12 and a fluid inlet 11. The spiral flow channel 2 is formed with an outer contour 21 and an inner contour 22 by extending spirally along the peripheries of two opposite inner side walls of the cylinder 1, as shown in fig. 2, the outer contour 21 and the outer circumferential wall of the cylinder 1 in the flow channel extending direction have a parallel edge form, i.e. the side wall of the cylinder 1 tangent to the outer contour 21 is also the outer contour wall of the spiral flow channel 2, and the inner contour 22 is coaxial with the outer contour 21 and gradually approaches the outer contour 21, so that the cross section area of the spiral flow channel 2 is gradually reduced along the flow channel extending direction (i.e. the flow direction), i.e. the flow area of the spiral flow channel 2 is gradually reduced along the flow.

As shown in fig. 1, 3 and 4, a liquid phase lead-out hole 3 (i.e. a liquid phase lead-out hole group, including a plurality of through holes with the same size) is formed in a side wall of the cylinder 1 (i.e. an outer contour wall of the spiral channel 2, i.e. an outer circumferential wall of the cylinder 1) tangent to the outer contour 21 and penetrates through the side wall, so that a liquid phase flow attached to the outer contour wall directly enters the liquid phase lead-out hole 3 along a tangential direction, a favorable overflow channel is provided for a liquid phase (or a liquid film) separated from the spiral channel 2, and the liquid phase separated from a gas-liquid mixture is discharged in time.

As shown in fig. 1, 3-6, a disc-shaped water collection tank 5 is further sleeved on the outer circumferential wall of the bottom of the cylinder 1 and is used for collecting the liquid phase led out from the liquid phase lead-out hole 3, and a drain pipe 6 for controlling the height of the upper liquid level of the water collection tank 5 is arranged on the outer edge of the water collection tank 5 and is used for draining water when the upper liquid level of the water collection tank 5 is higher than the lower end surface of the flow guide cover 4.

And a cylindrical flow guide cover 4 is coaxially sleeved around the outer circumference of the cylinder 1 corresponding to the liquid phase lead-out hole 3, an annular flow guide cavity capable of sealing a gas phase is formed between the inner circumferential wall of the flow guide cover 4 and the outer circumferential wall of the cylinder 1 in a surrounding manner, and the flow guide cavity is communicated with the spiral flow channel 2 through the liquid phase lead-out hole 3. According to the example shown in fig. 1, 3-6, the upper port of the air guide sleeve 4 is reduced to fit on the side wall of the cylinder 1 to make the upper end closed, and the lower end is open and extends to the upper liquid level of the water collection tank 5 to realize liquid seal (see fig. 4). By adopting the structure design, the use purpose of gas sealing and liquid discharging of the flow guide cavity can be realized, the gas phase loss and the pressure drop loss caused by the overflow of the airflow are further reduced, the liquid phase can overflow along the liquid phase lead-out hole 3 more smoothly under the action of the internal and external pressure difference between the spiral flow channel 2 and the flow guide cavity, the outer layer descending rotational flow is formed, namely, the liquid phase is guided to the upper liquid level of the water collecting groove 5 from the liquid phase lead-out hole 3 along the side wall of the flow guide cavity, and finally, the liquid phase is discharged in time through the drain pipe 6 (not shown), thereby improving the. It should be understood that the top cover may also be disposed on the upper end surface of the air guide sleeve 4 to cover the upper port of the air guide cavity to close the upper end; alternatively, other closure means are possible.

When the spiral gas-liquid separator in this embodiment is used for gas-liquid separation, a gas-liquid mixture (i.e., fluid) having a certain speed enters the spiral flow channel 2 from the fluid inlet 11 along the tangential direction of the cylinder 1 and moves upward along the spiral of the spiral flow channel 2 to generate centrifugal force, so that a liquid drop phase (due to high density) subjected to the action of the centrifugal force is thrown to the outer contour side of the spiral flow channel 2 to continue moving upward, that is, an outer ascending liquid phase rotational flow is formed, and a gas phase (due to low density) subjected to low centrifugal force is polymerized to the central part of the spiral flow channel 2 to continue moving upward, that is, an inner ascending gas phase rotational. Along with the gradual reduction of the flow area of the gas-liquid mixture along the spiral flow channel 2, the flow velocity of the gas phase and the liquid phase is increased continuously, namely the inertial centrifugal action of the liquid drop phase in the gas phase is enhanced continuously, so that the liquid drop in the gas phase rotational flow is separated continuously under the enhanced centrifugal action and thrown to the outer contour wall to form a liquid film/liquid phase, one part of the liquid film/liquid phase is pushed to the liquid phase outlet hole 3 at the upper part under the action of the self-ascending motion inertia and the carrying action of the inner-layer ascending gas phase rotational flow, the other part of the liquid film/liquid phase is refluxed to the liquid phase outlet hole 3 at the lower part along the outer contour wall of the spiral flow channel 2 under the action of self gravity, and the liquid film/liquid phase smoothly overflows along the liquid phase outlet hole 3 under the action of the internal-external pressure difference between the spiral flow channel 2 and; and the part which flows back to the bottom and does not flow through the liquid phase lead-out hole 3 flows back along the spiral flow channel 2 to the fluid outlet 12 at the bottom of the cylinder to be discharged out of the separator. And the gas phase rotational flow at the central part of the spiral flow channel continuously rises to the top along the spiral flow channel 2, and finally is discharged out of the separator from the fluid outlet and enters gas utilization equipment.

In the embodiment, by adopting the tangentially arranged fluid inlet 11 and spiral flow channel 2 structure, the turbulence effect of the fluid at the inlet and in the spiral flow channel 2 is effectively reduced, and the pressure loss at the inlet and in the liquid flow direction is reduced; the diversion cover structure design is adopted to provide an independent diversion cavity capable of sealing gas and draining liquid for each liquid phase lead-out hole, so that the gas phase loss and the pressure drop loss are further reduced; meanwhile, the outer contour 21 of the spiral flow channel 2 is arranged to be parallel to the outer circumferential wall of the cylinder 1 along the liquid flow direction, and the inner contour 22 of the spiral flow channel 2 gradually shrinks to the outer contour 21 along the liquid flow direction, so that the flow area of the fluid is uniformly and rapidly reduced along the liquid flow direction, the gas-liquid mixture can reach a sufficiently high flow speed along the liquid flow direction even under the condition of small fluid input pressure or small spiral period number, the inner layer gas phase rotational flow can continuously separate liquid drops with smaller radius along the liquid flow direction, and the critical separation radius (namely the minimum radius of the separated liquid drops) of the liquid drops is reduced, so that a better separation effect is achieved; in addition, in the process that the inner contour 22 of the spiral flow channel 2 gradually shrinks to the outer contour 21 along the liquid flow direction, a certain additional extrapolation effect is generated on small-size liquid drops entrained in the inner-layer ascending gas-phase rotational flow, so that the liquid drops in the inner-layer ascending gas-phase rotational flow are more easily separated to the outer contour side, and the liquid drops are favorably attached to the outer contour wall.

Advantageously, in order to achieve a better liquid phase separation effect, the liquid phase extraction holes 3 may be arranged in multiple stages (i.e. multiple groups), so that the multiple stages of liquid phase extraction holes 3 are regularly distributed on the outer contour wall of the spiral flow channel 2 at intervals according to a certain spiral period (as shown in fig. 4), and the liquid phase formed on the outer contour wall can be extracted in time through the liquid phase extraction holes 3 step by step during the process of rising along the liquid flow direction. Meanwhile, as shown in fig. 1, 3 and 4, corresponding to each level of liquid phase lead-out hole 3, multiple fairings 4 are sleeved on the outer circumference of the cylinder 1 from inside to outside in a radial direction layer by layer, wherein the height and the inner diameter of the multiple fairings 4 are sequentially increased from inside to outside in the radial direction, so that a multi-level annular flow guide cavity is formed between the cylinder 1 and the nearest fairings 4 and between two adjacent fairings 4, the multi-level flow guide cavities are sleeved layer by layer from inside to outside in the radial direction, and the upper end and the lower end of each level of flow guide cavity are closed and the lower end of each level of flow guide cavity is open and extends to the upper liquid level of the water collecting tank. When the separator operates, the water collection groove 5 is in a liquid accumulation state, and the lower ports of the diversion cavities at all levels are covered by the upper liquid surface of the water collection groove 5 to realize liquid seal, so that the diversion cavities at all levels are mutually independent.

Specifically, as shown in fig. 1 to 6, a spiral gas-liquid separator according to aspects of the present invention is exemplarily shown, in which a cylinder 1 is a circumferential solid cylinder having a height of 220mm and an outer diameter (referred to as an outer circumferential diameter) of 148mm, and a spiral flow passage 2 includes two spiral periods. As shown in FIG. 2, the fluid inlet 11 has a rectangular cross section with a length and width of 61.37mm and 32.28mm, respectively, and an area of 2015.124mm 2, and the fluid outlet 12 has an irregular quadrilateral (i.e., trapezoidal) cross section with an upper base of 5.41mm, a lower base of 17.11mm, an outer width and an inner width of 32.28mm and 34.33mm, respectively, and an area of 363.126mm 2. The area ratio of the fluid inlet 11 to the fluid outlet 12 was 5.55.

As shown in fig. 1, a water collecting groove 5 in the shape of a ring disk is sleeved on the outer circumferential wall of the bottom of the cylinder 1, and the inner diameter (referred to as the inner circumferential diameter) of the water collecting groove is 148mm and 240mm, which is consistent with the outer diameter of the cylinder 1. The outer edge (i.e. the edge on the outer diameter side) of the water collection tank 5 extends upwards to form a water retaining edge for keeping the upper liquid level of the water collection tank 5; the periphery of the water collecting groove 5 is also sleeved with a drain pipe 6 for discharging the redundant liquid phase in the water collecting groove 5. Specifically, in this example, as shown in fig. 1, the drain pipe 6 is formed with a drain ring groove that penetrates through in the axial direction through an inner wall and an outer wall of the drain pipe on the outer diameter side, the inner wall diameter of the drain ring groove is 232mm, the outer wall diameter is 240mm, an upper port of the ring groove is flush with the upper end surface of the water collecting tank 5 (i.e., an upper liquid surface when the water collecting tank 5 is balanced, which is not higher than the lower end surface of the baffle 4), and is attached to the outer peripheral wall of the water retaining edge of the water collecting tank 5, and a lower port thereof penetrates through the ring groove in the axial direction all the way to the upper liquid surface of the initial fluid source located at the lower portion of the cylinder 1 (only an upper structure of the drain ring groove that surrounds the outer peripheral edge of the water collecting tank 5 is simply illustrated in fig. 1, and an actual drain. When the upper liquid level of the water collecting groove 5 is higher than the upper end surface of the water collecting groove 5, the redundant accumulated liquid overflows to the hydrophobic ring groove on the periphery of the water collecting groove and is discharged to the upper liquid level of the fluid source along the hydrophobic ring groove, so that secondary liquid drops can be prevented from being caused when the redundant accumulated liquid directly falls to the upper liquid level of the initial fluid source, the humidity of the input gas-liquid mixture is increased, and the high gas phase content of the input gas-liquid mixture is favorably ensured.

As shown in fig. 3 and 4, a side wall of the cylinder 1 (i.e., an outer wall of the spiral passage 2) tangent to the outer contour 21 is provided with a first liquid phase extraction hole 31, a second liquid phase extraction hole 32, a third liquid phase extraction hole 33, and a fourth liquid phase extraction hole 34 at equal intervals from the end of the fluid inlet 11, the first liquid phase extraction hole 31, the second liquid phase extraction hole 32, the third liquid phase extraction hole 33, and the fourth liquid phase extraction hole 34 correspond to 1/2, 1, 3/2, and 2 spiral periods of the outer contour 21 line, respectively, that is, the outer contour wall of the spiral passage 2 is provided with a first-stage liquid phase extraction hole 3 at every 1/2 spiral periods from the end of the fluid inlet 11, four stages are alternately distributed on both sides of the cylinder 1, and two adjacent stages of liquid phase extraction holes 3 are circumferentially symmetrical along the spiral passage 2. Wherein, each stage of liquid phase lead-out holes 3 comprise 3-5 rows and 10-20 columns of circular through holes (only partial through holes are positioned on the outer contour wall of the spiral channel 2), the diameter of the open hole is 1mm to 3mm, correspondingly, the hole spacing is 1mm to 3mm, and the hole spacing is uniform, thus being convenient for processing. The four-stage liquid phase lead-out hole 3 can timely and fully discharge a liquid film formed in the spiral channel 2, prevent the liquid film from being carried by airflow to generate secondary liquid drops, improve the separation efficiency, save the number of holes and reduce the processing and manufacturing process. It should be understood that the shape of the through hole in the liquid phase lead-out hole 3 may be other than a circle, such as a semicircle, an ellipse, or other arc shapes.

Corresponding to the first liquid phase outlet hole 31, the second liquid phase outlet hole 32, the third liquid phase outlet hole 33, and the fourth liquid phase outlet hole 34, as shown in fig. 3 and 4, the side wall of the barrel 1 above each stage of the liquid phase outlet hole 3 is sequentially sleeved with a first guiding cover 41, a second guiding cover 42, a third guiding cover 43, and a fourth guiding cover 44, the first guiding cavity 401, the second guiding cavity 402, the third guiding cavity 403, and the fourth guiding cavity 404 are enclosed into a ring shape between the outer circumferential wall of the barrel 1 and the inner circumferential wall of the first guiding cover 41, between the outer circumferential wall of the first guiding cover 41 and the inner circumferential wall of the second guiding cover 42, between the outer circumferential wall of the second guiding cover 42 and the inner circumferential wall of the third guiding cover 43, and between the outer circumferential wall of the third guiding cover 43 and the inner circumferential wall of the fourth guiding cover 44, respectively, the upper end of the guiding cavity is closed, the lower end is open, and extends downward to be close to the bottom surface of the water collecting tank 5, when liquid accumulates in the water collection tank 5, the lower end of each stage of the guide cover 4 extends to the upper liquid surface of the water collection tank 5 and is covered by water, and the upper liquid surface of the water collection tank 5 is used for realizing liquid seal on the lower end ports of the guide cavities.

When the multistage liquid phase extraction hole is used for gas-liquid separation, after a liquid film/liquid phase separated from an initial gas-liquid mixture entering the spiral flow channel under the action of centrifugal force flows through the first stage liquid phase extraction hole 31, most of the liquid phase is discharged into the first flow guide cavity 401, falls under gravity and then enters the water collection tank 5. Then, the remaining small amount of liquid phase and the gas phase rotational flow continue to move upwards along the spiral flow passage 2, the centrifugal force action is further strengthened along with the continuous rising of the flow velocity, the remaining small amount of liquid phase is further thrown to the outer contour wall to form a liquid film under the action of the centrifugal force, the gas phase polymerization with low density continues to move upwards, the liquid phase content is further reduced, and the dryness is further increased. After the mixed fluid passes through the second-stage liquid phase extraction hole 32, most of the liquid phase is discharged into the second diversion cavity 402, flows into the water collection tank 5 after falling down by gravity, and is discharged out of the separator through the drain ring pipe 6. By analogy with the principle, the liquid phase which is not separated in the mixed fluid is further separated after passing through the third liquid phase leading-out hole and the third flow guide sleeve, and the fourth liquid phase leading-out hole and the fourth flow guide sleeve, so that the gas-liquid separation efficiency reaching the fluid outlet 12 can reach 99.9%. The gas phase cyclone enters a large space above the top of the separator cylinder 1 after reaching the fluid outlet 12, the flow area is rapidly increased, the gas phase and the liquid phase are rapidly expanded, the pressure is rapidly reduced, the residual liquid phase is subjected to flash evaporation, the dryness of steam is further improved, the separation efficiency is improved, and finally the gas phase is polymerized and then conveyed to a steam turbine or other gas devices.

In the embodiment of the invention, the multi-stage liquid phase lead-out holes 3 are arranged, so that the inner layer gas phase rotational flow can continuously separate liquid drops with smaller radius along the liquid flow direction, the critical separation radius of the liquid drops (namely the minimum radius of the liquid drops which can be separated) is reduced, and meanwhile, the separated liquid drops can be timely discharged through the multi-stage liquid phase lead-out holes 3 in the flowing process along the outer contour wall, the liquid discharge requirement is fully met, and the condition that the separation efficiency is reduced because the retention liquid film is carried by air flow to generate secondary liquid drops is avoided. Compared with a liquid drainage mode of arranging a large-range liquid phase outlet section in a traditional separator, the liquid drainage device effectively saves the number of the openings and reduces the pressure drop loss. Meanwhile, the flow guide cover 4 is additionally arranged on the periphery of each stage of liquid phase lead-out hole 3, an independent flow guide space, namely a flow guide cavity, is provided for each stage of liquid phase lead-out hole 3, and the problem that the gas phase forms internal flow in the two stages of liquid phase lead-out holes 3 with different heights, so that the flow speed of the fluid is reduced, and the gas-liquid separation efficiency is reduced is solved; and the phenomenon that the separated liquid phase/liquid film discharged from the upper liquid phase lead-out hole 3 flows through the lower liquid phase lead-out hole 3 to cause the blockage of the liquid phase lead-out hole 3, the liquid discharge speed of the lower liquid phase lead-out hole 3 and the flow guide cavity is reduced, the separated liquid phase cannot be discharged in time and enters the spiral flow channel 2 again, the liquid phase amount carried in the ascending gas phase on the inner side is increased, and the separation efficiency is reduced. In addition, the gas phase can be prevented from flowing between the lower ports of the diversion cavities, so that the pressure drop is reduced. Therefore, the separator automatically realizes multiple high-efficiency gas-liquid separation, the separation effect is better, the complex structure of the traditional multiple gas-liquid separator is omitted, and the structural design and the processing and manufacturing difficulty of the separator are reduced.

It should be understood that the number of spiral cycles of the spiral channel 2, the ratio of cross-sectional areas of the fluid outlet 12 and the fluid inlet 11, the number of stages and arrangement of the liquid phase extraction holes 3, the number of rows and columns of the through holes in the liquid phase extraction holes 3, the aperture size, the hole pitch, the hole shape, etc. are not limited to those listed in the above examples, and the parameters can be designed reasonably according to the actual separation requirement to achieve the best separation effect.

For example, optionally, according to various embodiments of the present application, the number of spiral periods of the spiral channel 2 is two to four, but of course, also more spiral periods are possible.

For example, optionally, according to various embodiments of the present application, the cross-sectional area ratio of the fluid outlet 12, the fluid inlet 11 is 1 to 10, although higher cross-sectional area ratios are also possible in combination with a specific number of spiral cycles of the spiral channel 2.

For example, optionally, according to various embodiments of the present application, a plurality of spiral channels 2 may be simultaneously disposed on the inner circumference of the cylinder, and the plurality of spiral channels 2 are distributed side by side along the circumferential direction, so as to effectively improve the overall gas-liquid separation processing capacity of the spiral separator, and greatly improve the steam-water separation efficiency.

For example, the multi-stage liquid phase extraction orifices 3 may alternatively comprise one, two, three, four, five, six, or even more stages, according to various embodiments of the present application; the multistage liquid phase extraction holes 3 may be disposed on the outer contour wall of the spiral channel 2 at unequal intervals.

Further, since the gas-liquid mixture in the spiral channel 2 near the fluid inlet 11 has a relatively large liquid phase content compared to the gas-liquid mixture near the fluid outlet 12, the liquid discharge requirement is relatively large. Therefore, in the embodiment of the present invention, the number of stages (groups) of the liquid phase lead-out holes 3, the number of through holes, the aperture size, and the distance between the lower ports of the diversion cavities corresponding to the liquid phase lead-out holes 3 on the outer peripheral wall of the spiral channel 2 near the fluid inlet 11 end can be properly increased compared to the number (such as the number of rows, columns, etc.) of the liquid phase lead-out holes 3, the aperture size, and the distance between the lower ports of the diversion cavities corresponding to the liquid phase lead-out holes 3 on the outer peripheral wall of the spiral channel 2 near the fluid outlet 12 end, that is, several stages of the liquid phase lead-out holes 3 can be arranged on the outer peripheral wall of the spiral channel 2 near the fluid inlet 11 end.

For example, alternatively, according to various embodiments of the present application, the number of holes of the first-stage liquid-phase drawing hole 3 near the fluid inlet 11 end among the first liquid-phase drawing hole 31, the second liquid-phase drawing hole 32, the third liquid-phase drawing hole 33, and the fourth liquid-phase drawing hole 34 is greater than or equal to the number of holes of the first-stage liquid-phase drawing hole 3 near the fluid outlet 12 end;

and/or the aperture of the first-stage liquid phase extraction hole 3 close to the fluid inlet 11 end in the first liquid phase extraction hole 31, the second liquid phase extraction hole 32, the third liquid phase extraction hole 33 and the fourth liquid phase extraction hole 34 is larger than or equal to the aperture of the first-stage liquid phase extraction hole 3 close to the fluid outlet 12 end. Therefore, the liquid drainage capacity of the liquid phase lead-out hole 3 on the outer contour wall of the spiral channel 2 close to the fluid inlet 11 end is improved, and the liquid drainage requirement is fully met.

For example, optionally, according to various embodiments of the present application, the lower ports of the first guide cavity 401, the second guide cavity 402, the third guide cavity 403, and the fourth guide cavity 404 are equally spaced or gradually become smaller from inside to outside in the radial direction.

Specifically, according to the embodiment shown in fig. 1 and 3 to 6, the inner diameters of the upper ports of the first, second, third, and fourth fairings 41, 42, 43, 44 are all equal to the outer diameter of the cylinder and are 148mm, the outer diameters of the lower ports of the first, second, third, and fourth fairings 41, 42, 43, 44 are 160mm, 170mm, 178mm, 186mm, respectively, and the wall thickness of the quadruple fairings is 1mm, so that the distances between the lower ports of the first diversion cavity 401, the second diversion cavity 402, the third diversion cavity 403, and the fourth diversion cavity 404 gradually decrease. Each stage of flow guide cavity is communicated with the spiral flow channel 2 through the corresponding first-stage liquid phase lead-out hole 3 and is used for guiding the outer-layer descending rotational flow at the position corresponding to the liquid phase lead-out hole 3 and extending to the upper liquid level of the water collection tank 5 from the liquid phase lead-out hole 3. Therefore, the liquid discharge capacity of the lower port of the flow guide cavity corresponding to the liquid phase lead-out hole 3 close to the fluid inlet 11 end is improved, and the liquid discharge requirement is fully met. According to the illustrated embodiment, the separation efficiency of the gas-liquid separator can reach about 99.9% through simulation analysis.

Alternatively, according to various embodiments of the present application, the liquid phase extraction hole 3 is provided horizontally penetrating the sidewall of the barrel 1 in a radial direction, i.e., a horizontal through hole, as shown in fig. 4; or, the outer side of the cylinder 1 is inclined downwards to penetrate through the side wall of the cylinder 1, namely, the inclined through hole is inclined outwards and downwards, the size of the outlet end of the through hole can be larger than or equal to that of the inlet end, and the arrangement is convenient for the liquid phase separated from the spiral flow channel 2 to smoothly overflow along the liquid phase lead-out hole 3, so that the liquid discharge capacity of the liquid phase lead-out hole 3 is improved.

Alternatively, according to the embodiment shown in fig. 1, the drain pipe 6 is a drain pipe 6 sleeved on the outer peripheral wall of the water collecting tank 5, the outer diameter side of the drain pipe 6 is formed with a drain ring groove (shown in fig. 1) which is formed through the inner wall and the outer wall along the axial direction, the drain ring groove extends downward along the axial direction all the time to form a drain channel for draining liquid to the lower part of the cylinder 1, and the drain channel is used for draining water when the upper liquid level of the water collecting tank is higher than the lower port of the flow guiding cavity.

Alternatively, according to other embodiments of the present application, the drainage tube 6 is a drainage tube (not shown) distributed on the outer periphery of the water collection tank 5, the outlet of the drainage tube is located upstream of the upper liquid level of the water collection tank 5, and when the upper liquid level of the water collection tank 5 is higher than the lower end surface of the air guide sleeve 4 and reaches the outlet height of the drainage tube, the excess effusion is discharged through the outlet of the drainage tube. This embodiment also achieves the technical effects described in the above examples.

Alternatively, according to other embodiments of the present application, the drain pipe 6 is a drain valve that can be used to automatically control the flow rate of the water collection tank 5, so that the upper liquid level of the water collection tank 5 is higher than the lower end surface of the air guide sleeve 4 to drain water. For example, a ball valve and a flow meter are installed on the drain pipe 6, and the flow rate branched off from the outlet of the drain pipe 6 is controlled to account for the percentage of the flow rate of the water collection tank 5 by adjusting the ball valve, so that the upper liquid level of the water collection tank 5 is stabilized at the upstream of the lower port of the diversion cavity, that is, the lower port of the diversion cavity is always covered by the upper liquid level of the water collection tank 5 to realize liquid seal.

Optionally, in the embodiment of the present invention, the cross section of the spiral flow channel 2 has a rectangular shape, or a trapezoid shape, or a circular shape, or an arc shape, or a triangular shape, or other geometric shapes.

Alternatively, in the embodiment of the present invention, the cylindrical barrel 1 may be cylindrical (as shown in fig. 1) or conical (not shown). The cylinder 1 can be a solid cylindrical cylinder 1, or a hollow cylindrical cylinder 1 (not shown) with a certain wall thickness, or a coaxial inner and outer hollow cylinder 1 structure.

As an example, when the solid cylindrical barrel 1 or the hollow cylindrical barrel 1 with a certain wall thickness is designed, the spiral flow passage 2 can be formed by a die casting processing method to meet the performance index of the spiral gas-liquid separator. The forming mode is simple, and the processing amount is reduced.

As another example, when the inner and outer hollow cylinder 1 is designed, an outer spiral groove recessed along the circumference of the side wall may be formed on the inner circumferential wall of the outer cylinder 1, and an inner spiral groove recessed along the circumference of the side wall may be formed on the outer circumferential wall of the inner cylinder 1 (not shown). When the cylindrical body is assembled, the inner circumferential wall of the outer cylindrical body 1 is sleeved on the outer circumferential wall of the inner cylindrical body 1, so that the outer spiral groove and the inner spiral groove are spliced and connected to form a sealed (can be in a welding sealing mode or a sealing mode of clamping a sealing ring) spiral channel 2, the outer periphery of the outer spiral groove forms an outer contour 21 of the spiral channel 2, the outer periphery of the inner spiral groove forms an inner contour 22 of the spiral channel 2, the outer contour 21 and the outer circumferential wall of the cylindrical body 1 have a parallel edge form along the extending direction of the flow channel, namely, the outer circumferential wall of the outer spiral groove of the outer cylindrical body 1 is the outer contour wall of the; the inner contour 22 is coaxial with the outer contour 21 and gradually approaches to the outer contour 21, so that the cross section area of the spiral flow channel 2 is gradually reduced along the extending direction of the flow channel, and the performance index of the spiral gas-liquid separator is met. The structural design of the inner cylinder body 1 and the outer cylinder body 1 is adopted, and compared with a casting forming mode, the processing difficulty is favorably reduced, and higher forming quality is ensured.

To sum up, the spiral gas-liquid separator provided by the embodiment of the invention comprises a cylindrical barrel, wherein the upper end surface and the lower end surface of the barrel are provided with a fluid outlet and a fluid inlet, a spiral flow passage is arranged along the tangential direction of the inner circumference of the barrel, the spiral flow passage runs through from the fluid inlet to the fluid outlet, the spiral flow passage comprises an outer contour and an inner contour, the outer contour and the outer circumferential wall of the barrel have a parallel edge form along the extending direction of the flow passage, and the inner contour is coaxial with the outer contour and gradually approaches to the outer contour; the bottom of the cylinder is sleeved with a water collecting groove, and a drain pipe is arranged on the water collecting groove; the side wall of the cylinder body tangent to the outer contour is provided with a plurality of liquid phase lead-out holes at intervals, correspondingly, a plurality of flow guide covers are sleeved outside the cylinder body layer by layer from inside to outside along the radial direction, so that a plurality of flow guide cavities are formed, which are sleeved layer by layer from inside to outside along the radial direction, the upper end of each flow guide cavity is closed, the lower end of each flow guide cavity is open, and the flow guide cavities extend to the upper liquid level of the water collecting tank from the liquid. According to the invention, the barrel and the spiral flow passage are integrally formed, so that the integral structure is simple and the operation is reliable, and the complex structure of the traditional multistage gas-liquid separator is omitted. By adopting the tangentially arranged fluid inlet and spiral flow channel structure, the turbulent flow action of the fluid at the inlet and in the spiral flow channel is effectively reduced, and the pressure loss at the inlet and in the liquid flow direction is reduced; and the flow guide cover structure design is adopted to provide an independent flow guide cavity capable of sealing gas and discharging liquid for each liquid phase outlet hole, so that the gas phase loss and the pressure drop loss are further reduced, and the spiral period number, the structure change parameters and the mode of the spiral flow channel are reasonably designed, so that the separation efficiency is greatly improved. The multistage liquid phase extraction holes are arranged on the outer contour wall of the spiral flow channel at intervals, so that a liquid film formed in the spiral channel is ensured to be timely and fully discharged, the reduction of separation efficiency caused by gas-liquid remixing is reduced, the number of holes is effectively reduced, the processing amount is reduced, and the pressure drop loss of the flow channel is reduced; meanwhile, the multi-stage liquid phase lead-out holes are matched with the multiple flow guide covers, and an independent flow guide cavity is provided for each liquid phase lead-out hole, so that the condition that the gas-liquid separation efficiency is reduced due to the fact that the flow velocity is reduced because gas phases are serially connected among the multi-stage liquid phase lead-out holes is avoided; and the conditions of gas-liquid remixing and separation efficiency reduction caused by the fact that the descending liquid phase/liquid film discharged from the upper liquid phase lead-out hole blocks the lower liquid phase lead-out hole and the liquid phase cannot be discharged in time are reduced or eliminated, and finally, the multiple and high-efficiency gas-liquid separation is automatically realized. Through steam-water separation simulation analysis of the spiral gas-liquid separator provided by the embodiment of the invention, the gas-liquid separation efficiency can reach 99.9%, and the correctness and high efficiency of the structural design of the spiral gas-liquid separator provided by the invention are verified.

In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "center", "opposite", "above", "below", "upper", "lower", "top", "bottom", "upper end (face)", "lower end (face)", "bottom end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or relative positional relationships between the two, and are only for convenience of simplifying the description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first," "second," "third," "fourth," etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.