阅读说明：本技术 一种除雾辅助系统、旋流板除雾器及烟囱装置 (Defogging auxiliary system, whirl plate defroster and chimney device ) 是由 梁雪琪 吕文豪 行宇 李凯华 陈艳艳 祁晓晖 冯想红 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种除雾辅助系统、旋流板除雾器及烟囱装置。所公开的除雾辅助系统包括主体筒,所述主体筒上端部边缘朝筒内中心水平延伸一定宽度形成挡流环,所述挡流环上开设有至少一个导液孔；所述挡流环内边缘向上延伸形成导流筒；所述主体筒侧壁上沿主体筒的至少一个水平周向开设有多个均匀分布的捕液狭缝,且各捕液狭缝相对主体筒轴线为倾斜状；主体筒内上升烟气中的蒸汽冷凝出的液滴被收集至挡流环后经主体筒外壁流至筒底被收集。所公开的旋流板除雾器与烟囱装置安装有上述系统。本发明的除雾辅助系统可以有效收集由于离心作用甩在壁面的液膜,也可以有效抑制液膜被壁面附近高速流动的烟气撕裂导致的二次携带。(The invention discloses a demisting auxiliary system, a swirl plate demister and a chimney device. The disclosed demisting auxiliary system comprises a main body cylinder, wherein the edge of the upper end part of the main body cylinder horizontally extends towards the center in the cylinder by a certain width to form a flow blocking ring, and the flow blocking ring is provided with at least one liquid guide hole; the inner edge of the flow blocking ring extends upwards to form a guide cylinder; a plurality of liquid catching slits which are uniformly distributed are formed in the side wall of the main body cylinder along at least one horizontal circumferential direction of the main body cylinder, and each liquid catching slit is inclined relative to the axis of the main body cylinder; liquid drops condensed from steam in the ascending flue gas in the main body cylinder are collected to the flow blocking ring and then flow to the cylinder bottom through the outer wall of the main body cylinder to be collected. The disclosed swirl plate mist eliminator and chimney device are equipped with the above system. The demisting auxiliary system can effectively collect the liquid film thrown to the wall surface due to the centrifugal effect and can also effectively inhibit the secondary carrying caused by the tearing of the liquid film by the high-speed flowing smoke near the wall surface.)

1. A demisting auxiliary system is characterized by comprising a main body cylinder, wherein the edge of the upper end part of the main body cylinder horizontally extends towards the center of the cylinder by a certain width to form a flow blocking ring, and the flow blocking ring is provided with at least one liquid guide hole;

the inner edge of the flow blocking ring extends upwards to form a guide cylinder;

a plurality of liquid catching slits which are uniformly distributed are formed in the side wall of the main body cylinder along at least one horizontal circumferential direction of the main body cylinder, each liquid catching slit is inclined relative to the axis of the main body cylinder, and the inclination directions of the liquid catching slits are the same.

2. A mist elimination aid system according to claim 1 wherein said liquid trap slit is inclined in a direction perpendicular to a line tangent to the point on the flue gas upward spiral that is most initially in contact with the liquid trap slit.

3. A defogging aid system according to claim 1 wherein, for any two adjacent liquid catching slits AB and CD in the circumferential direction, the projection C 'D' of the liquid catching slit CD on the plane M which passes through the long central line of the liquid catching slit AB and is perpendicular to the rectangular plane of the liquid catching slit AB is not spaced from the liquid catching slit AB in the lengthwise direction.

4. A defogging aid system as recited in claim 1 wherein said body barrel height is between 1 and 2 times the pitch of the rising spiral of the fumes.

5. A defogging aid system according to claim 1 wherein said fluid conducting aperture is in the form of a fan-shaped annular aperture and a plurality of fan-shaped annular apertures are evenly distributed on said flow blocking ring.

6. A defogging aid system as recited in claim 1 wherein said flow guiding barrel is an inverted cone.

7. A defogging aid system according to claim 1 wherein said body canister is provided with a liquid trap at a bottom thereof, said trap being in communication with an outer wall of said body canister.

8. A defogging aid system according to claim 7 wherein said liquid collecting means includes at least one downcomer circumferentially mounted at the bottom of said body member and communicating with the outer wall of said body member, each downcomer having an L-shaped or S-shaped channel.

9. A defogging aid system according to claim 1 wherein a mounting ring plate is attached to the bottom of the body barrel and has an outer diameter greater than the outer diameter of the body barrel.

10. A defogging aid system according to claim 9 wherein a reinforcing ring plate is provided outside said main body barrel and is located in the axial middle region of said main body barrel, said reinforcing ring plate is locally connected with the outer wall of said main body barrel, and a reinforcing rib is connected between said reinforcing ring plate and said mounting ring plate; a plurality of reinforcing rib plates are arranged between the outer wall of the main body cylinder and the mounting ring plate.

11. A demister comprising the swirling plate of claim 1, wherein the swirling plate is mounted to a bottom of the mist elimination assisting system main body.

12. The swirl plate mist eliminator of claim 11 wherein the swirl plate comprises a plurality of vanes and the number of liquid trap slots in the sidewall of the main body cylinder are the same as the number of vanes in the same horizontal circumferential direction.

13. A chimney device comprises a chimney, a rotational flow plate is arranged at a chimney outlet, the device is characterized in that the auxiliary demisting system is arranged at the chimney outlet and is positioned above the rotational flow plate, and a liquid collecting cavity is formed between the outer wall of a main body cylinder and the inner wall of the chimney.

14. The chimney device of claim 13, wherein the body cylinder outer diameter is 0.81 to 0.85 times the inner diameter of the chimney body tower.

Technical Field

The invention relates to a gas-liquid separation device, in particular to a demisting auxiliary system and a cyclone plate demister.

Background

The whirl plate (also called the swirler) is a common gas-liquid separation device, also becomes the whirl plate defroster, and the air current produces rotation and centrifugal motion when passing through the blade in the whirl plate, and centrifugal force makes the liquid drop get rid of to the tower wall, and the liquid drop receives the action of gravity to flow down along the tower wall to separate in the follow air current. The rotational flow plate has the advantages of high separation efficiency, small resistance, difficult blockage and the like, and is applied in wide fields. At present, most of the swirl plate demisters are only provided with swirl plates, and when the amount of condensed liquid drops in flue gas is increased, the phenomenon of chimney rain often occurs.

Disclosure of Invention

Aiming at the defects or shortcomings of the prior art, the invention aims to provide a flow blocking ring formed by horizontally extending a certain width from the edge of the upper end part of a main body cylinder to the center in the cylinder, wherein the flow blocking ring is provided with at least one liquid guide hole; the inner edge of the flow blocking ring extends upwards to form a guide cylinder; a plurality of liquid catching slits which are uniformly distributed are formed in the side wall of the main body cylinder along at least one horizontal circumferential direction of the main body cylinder, each liquid catching slit is inclined relative to the axis of the main body cylinder, and the inclination directions of the liquid catching slits are the same. Liquid drops condensed from steam in the ascending flue gas in the main body cylinder are collected to the flow blocking ring and then flow to the cylinder bottom through the outer wall of the main body cylinder to be collected.

Preferably, the inclined direction of the liquid catching slit is perpendicular to the tangent line of the point on the flue gas rising spiral, which is at the beginning of contact with the liquid catching slit.

Preferably, for any two adjacent liquid capturing slits AB and CD in the circumferential direction, the projection C 'D' of the liquid capturing slit CD on the plane M is not spaced from the longitudinal direction of the liquid capturing slit AB, and the plane M is a plane passing through the long central line of the liquid capturing slit AB and perpendicular to the rectangular plane of the liquid capturing slit AB.

Preferably, the height of the main body cylinder is 1-2 times of the pitch of the smoke ascending spiral.

Preferably, the liquid guide hole is in the shape of a fan-shaped annular hole, and the fan-shaped annular holes are uniformly distributed on the flow blocking ring.

Preferably, the guide shell is in an inverted cone shape.

Further, the bottom of the main body barrel is provided with a liquid collecting device which is communicated with the outer wall of the main body barrel and used for collecting liquid at the bottom of the main body barrel.

Optionally, the liquid collecting device includes at least one downcomer, the at least one downcomer is circumferentially installed at the bottom of the main body cylinder and is communicated with the outer wall of the main body cylinder, and each downcomer is provided with an L-shaped or S-shaped pipeline.

Furthermore, the bottom of the main body cylinder is connected with a mounting ring plate, and the outer diameter of the mounting ring plate is larger than that of the main body cylinder.

Preferably, a reinforcing ring plate is arranged outside the main body cylinder and is positioned in the middle area in the axial direction of the main body cylinder, the reinforcing ring plate is locally connected with the outer wall of the main body cylinder so as not to influence the flow of liquid on the outer wall of the main body cylinder, and reinforcing ribs are connected between the reinforcing ring plate and the mounting ring plate; a plurality of reinforcing rib plates are arranged between the outer wall of the main body cylinder and the mounting ring plate.

Meanwhile, the invention provides a demister with a cyclone plate. Therefore, the swirl plate demister provided by the invention comprises the demisting auxiliary system and the swirl plate, wherein the swirl plate is arranged at the bottom of the main body cylinder of the demisting auxiliary system.

Preferably, the cyclone plate comprises a plurality of blades, and the number of the liquid catching slits in the same horizontal circumferential direction on the side wall of the main body cylinder is the same as that of the blades.

The invention also provides a chimney device. The chimney device provided by the invention comprises a chimney, wherein a rotational flow plate is arranged at an outlet of the chimney, the auxiliary demisting system is arranged at the outlet of the chimney and is positioned above the rotational flow plate, and a liquid collecting cavity is formed between the outer wall of the main body cylinder and the inner wall of the chimney. The flue gas in the chimney gets into main part section of thick bamboo in, and the steam liquid drop in the flue gas gets rid of the chimney inner wall under the effect of centrifugal force, and when near the flue gas velocity of flow of chimney inner wall was too high, when carrying the wall liquid film upflow, the liquid film was collected and is blocked to the annular class ring that keeps off of fender stream and become liquid interception, and later liquid flows to the bobbin base through main part section of thick bamboo outer wall and collecting liquid chamber and is collected.

Preferably, the outer diameter of the main body cylinder is 0.81-0.85 times of the inner diameter of the chimney main body tower.

Compared with the prior art, the demisting auxiliary system can effectively collect the liquid film thrown on the inner wall surface of the chimney under the centrifugal action, and can also effectively inhibit the secondary carrying caused by the tearing of the liquid film by the flue gas flowing at high speed on the wall surface; the flow blocking ring is positioned at the top of the main body cylinder, once the flow velocity of flue gas near the inner wall surface of the main body cylinder is too high, a liquid film on the inner wall of the main body cylinder has a tendency of flowing upwards, and the flow blocking ring can effectively block the liquid film flowing upwards; in addition, the flow blocking ring can push the smoke velocity peak area to the axis, so that the smoke velocity of the accessory on the wall surface of the chimney is reduced, and the secondary carrying effect is weakened; meanwhile, the liquid guide holes in the flow blocking ring can guide out the liquid film to break the liquid film, when the liquid film flows upwards to the flow blocking ring, part of the liquid is discharged out of the cylinder through the liquid guide holes and flows to the cylinder bottom along the outer wall of the main body cylinder or between the main body cylinder and the chimney to be collected. Further may be discharged through a downcomer.

Aiming at the problem of chimney rain in the operation of the established swirl plate demister system, the invention can collect, block and discharge liquid drops by reforming the swirl plate on the premise of not damaging the corrosion resistance in the chimney, and simultaneously reduce the flow velocity of flue gas attached to the wall surface of the chimney, thereby improving the phenomenon of secondary carrying of the liquid drops after gas-liquid separation of the swirl plate and further solving the problem of chimney rain.

On the other hand, compared with the existing swirl plate provided with the outer cylinder, the swirl plate in the demister disclosed by the invention has the advantages that the main body cylinder is arranged at the upper part of the outer cylinder of the swirl plate and integrally increased, liquid drops catching gaps on the wall surface of the main body cylinder and the flow blocking ring provided with the liquid guide hole at the top can effectively discharge liquid and reduce the flow velocity of smoke on the wall surface of the chimney, so that the secondary carrying phenomenon caused by tearing of the liquid film on the wall surface by the smoke flowing at a high speed is weakened from the two aspects, and.

The invention is suitable for engineering reconstruction of a running chimney with a chimney rain problem, does not need to rebuild the chimney, and does not damage or influence an anticorrosive structure layer in the chimney. The structure of the invention can avoid the chimney reducing and has simpler structure. Particularly, aiming at the problem of chimney rain in the operation of the built smoke-tower integrated device, the invention can collect, block and discharge liquid drops by designing a demisting auxiliary system on the premise of not damaging the corrosion prevention in the chimney and the CEMS detection at the chimney outlet, and simultaneously reduce the flow velocity of smoke gas on the wall surface of the chimney, thereby improving the phenomenon of secondary carrying of the liquid drops after gas-liquid separation of the cyclone plate and further solving the problem of chimney rain. A liquid collecting cavity is formed in the space between the main body cylinder and the chimney in the chimney device, and liquid can be discharged from the lower portion of the liquid collecting cavity.

Drawings

FIG. 1 is a schematic view of a defogging aid system according to the present invention;

FIG. 2 is a schematic view of the internal structure of the auxiliary defogging system of FIG. 1 with a swirl plate installed therein;

FIG. 3 is a top view of a chimney fitted with a swirl plate mist eliminator of the present invention;

FIG. 4 is a schematic diagram illustrating the relationship between the positions of the liquid-catching slits in the auxiliary defogging system according to the present invention; in the figure, arrows are pointed in the projection direction, AB and CD represent any two circumferentially adjacent liquid catching slits, and C 'D' represents CD projection;

FIG. 5 is a reverse principle schematic of FIG. 4;

fig. 6(a), (b), and (c) are schematic diagrams of pressure loss of A, B, C three structures, respectively.

Detailed Description

The following definitions apply to terms used in this specification unless otherwise limited by special circumstances. Moreover, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

For the purposes of the present invention, some terms used in this specification have the following meanings:

as used herein, directional terms, such as "horizontal", "upper", "inner", "axial", "circumferential", "long", "lengthwise", and the like, refer to directions or orientations that correspond to particular directions on the page of the drawings or corresponding directions in the spaces shown in the drawings.

The main body structure of the demisting auxiliary system is a cylinder body, at least one circle of liquid catching slits or liquid catching slits positioned on the horizontal circumference are arranged on the side wall of the main body cylinder, each circle is provided with a plurality of uniformly distributed liquid catching slits, each liquid catching slit is inclined relative to the axis of the main body cylinder, the edge of the upper end of the main body cylinder extends towards the inside of the cylinder in a horizontal shape for a certain width to form (including arrangement or installation) a flow blocking ring, and a through hole is arranged on the flow blocking ring to serve as a liquid guide hole; in order to better realize the demisting effect, a guide cylinder is formed by extending a certain height along the inner edge of the flow blocking ring (including arrangement or installation), and liquid drops in ascending flue gas in the main body cylinder are collected to the flow blocking ring and then flow to the cylinder bottom through the outer wall of the main body cylinder to be collected. The main body cylinder, the flow blocking ring and the guide cylinder can be integrally processed, and can also be assembled together after being processed respectively.

The width of the flow blocking ring at the top of the main body cylinder can be determined according to the thickness of the liquid film, the flow velocity of the flue gas near the wall surface is too large, the liquid film on the wall surface of the main body cylinder has the tendency of flowing upwards, and the flow blocking ring at the top of the main body cylinder can effectively intercept the liquid film flowing upwards.

The through hole is arranged on the flow blocking ring and is used as a liquid guide hole, when the flue gas flow velocity near the inner wall surface of the main body cylinder is too high, liquid is driven to flow upwards, after the liquid touches the flow blocking ring, a liquid film is guided out by the liquid guide hole, the liquid is discharged out of the main body cylinder through the liquid guide hole under the inertia effect, flows downwards along the outer wall of the cylinder or/and enters an annular cavity between the main body cylinder and the chimney, and is discharged through the downcomer. The drainage openings can preferably be a plurality of fan-shaped rings distributed along the annular surface.

In a more specific or preferable scheme, one circle, two circles or three circles of liquid catching slits with the same inclination direction are arranged on the main body cylinder and can be determined according to specific working conditions. In a further preferred embodiment, the liquid trap slit is inclined in the longitudinal direction thereof in such a manner that the inclined direction is perpendicular to a tangent line of a portion on a spiral (which means that the flue gas rises spirally in the chimney or the main body tube and may be referred to as a flue gas rising spiral) which is first brought into contact with the liquid trap slit during the rising of the flue gas in the main body tube.

The sizing of each trap slit of the present invention may follow the technical guidelines or guidelines shown in figure 4: namely, for any two adjacent slits AB and CD in the same layer or circle, a plane M passing through the middle line of the slit AB in the length direction and perpendicular to the rectangular surface of the slit AB is made, and the projection C 'D' of the CD on the plane M has no space with the length direction of the slit AB. While figure 5 shows the presence of a gap.

The guide cylinder arranged at the top of the main body cylinder is used for guiding the residual flue gas, the shape of the main body cylinder is preferably in an inverted cone shape, and the inverted cone guide cylinder is positioned in an inner ring of the flow blocking ring plate.

In a further scheme, a liquid collecting device is arranged at the bottom of the main body cylinder. In a specific scheme, the liquid collecting device can be designed into a plurality of downcomers with tubular structures, and the plurality of downcomers are dispersedly arranged at the bottom of the main body cylinder. In the preferred scheme, an L-shaped or S-shaped water seal is arranged on a downcomer pipeline, so that the influence of flue gas short circuit on drainage of a liquid collecting cavity between a chimney and a main body cylinder is prevented, and meanwhile, because the flue gas flow velocity near the wall surface of the chimney is lower, excessive flue gas is prevented from entering the downcomer.

In the aspect of realizing the installation of the defogging auxiliary system, the invention provides a plurality of selectable schemes, but not limited to the schemes, wherein one scheme is that a connecting ring plate is arranged at the bottom of a main body cylinder, a through hole for liquid drainage is arranged on the connecting ring plate, and a liquid collecting device or a downcomer is further arranged at the bottom of the through hole; the connecting ring plate in the scheme is used for installing the demisting auxiliary system in the chimney, and the outer diameter of the connecting ring plate is equivalent to the inner diameter of the chimney. Furthermore, a plurality of reinforcing rib plates distributed along the circumferential direction of the cylinder body can be arranged between the outer part of the main cylinder and the connecting ring plate. The other scheme is that a reinforcing ring plate is arranged at the middle position of the main body cylinder in the height direction outside the main body cylinder, the reinforcing ring plate is directly connected with the outer wall of the main body cylinder, the working space of a liquid collecting cavity between the outer wall of the main body cylinder and a chimney is not affected, and in addition, a plurality of reinforcing ribs can be arranged between the reinforcing ring plate and the connecting ring plate.

The swirl plate demister comprises the demister auxiliary system and the swirl plate, wherein the swirl plate without the outer cylinder is arranged at the bottom of the main body cylinder and is positioned in the cylinder, and the main body cylinder is directly arranged at the upper part of the outer cylinder for the swirl plate with the outer cylinder. To the whirl board that is equipped with a plurality of blades, a plurality of blades are installed for main part section of thick bamboo axis or chimney axis slope, and have the space between the adjacent blade. Preferably, the number of the liquid catching slits of each circle on the side wall of the main body cylinder is the same as that of the blades in the rotational flow plate. Generally, when the inner diameter of the chimney is larger than 1m, the number of the blades is larger than 24, and the range of the installation angle theta is 22.5 degrees < theta <30 degrees.

The chimney device is provided with the demisting auxiliary system or the swirl plate demister, wherein the demisting auxiliary system is arranged in the chimney and is positioned above the swirl plate or above an original swirl plate in the chimney, and meanwhile, a cavity between the outer wall of the main body cylinder and the inner wall of the chimney is a liquid collecting cavity, and liquid discharged from the flow guide hole can be collected through the cavity. Further, in order to improve the gas-liquid separation efficiency, improve the utilization rate of the inner space of the chimney and simultaneously realize the reduction of the diffusion flow velocity of the flue gas from the main body cylinder to the inner wall of the chimney, the outer diameter of the main body cylinder can be determined according to the inner diameter size of the chimney, and in the preferred scheme, the outer diameter d of the main body cylinder can be taken as the inner diameter d of the chimney₁0.81-0.85 times of the total weight of the composition. The scheme with better effect is that the height of the main body cylinder can be determined according to the motion form of the flue gas fluid, for example, the height h of the main body cylinder is 1-2 times of the pitch L of the flue gas ascending spiral, and an annular cavity liquid collecting tank structure is formed between the main body cylinder and the chimney.

The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.