阅读说明：本技术 一种筒状薄膜蒸发器 (Cylindrical film evaporator ) 是由 彭鹏 彭定云 宋浩 乔一波 赵文兴 于 2020-11-30 设计创作，主要内容包括：本发明提供了一种高效快速薄膜蒸发器,包括外壳、蒸发管组、排气器及分流器,蒸发管组设置在外壳内,排气器旋转设置在蒸发管组的蒸发管上,排气器包括公转设置的固定叶片与活动叶片,其中活动叶片自转设置,分流器对进入到蒸发室内的液氨进行分流,通过利用液氨自下向上流动产生的压力带动安装排气器进行旋转,排气器上的固定叶片保证排气器的顺畅旋转,而排气器上的活动叶片使得蒸发管上的液氨膜蒸发形成的气体可以快速的散去,避免气体阻挡,后续的液氨快速的在蒸发管上形成新的液氨膜,提高蒸发管的换热效率,并且配合分流器对液氨的分流作用,使得液氨分布的更加均匀,解决了气液转过过程中,气体对液体的阻碍的技术问题。(The invention provides a high-efficiency fast film evaporator, which comprises a shell, an evaporation tube group, an exhaust device and a splitter, wherein the evaporation tube group is arranged in the shell, the exhaust device is rotationally arranged on an evaporation tube of the evaporation tube group, the exhaust device comprises a fixed blade and a movable blade which are arranged in a revolution way, the movable blade is arranged in a self-rotating way, the splitter splits liquid ammonia entering an evaporation chamber, the exhaust device is driven to rotate by utilizing the pressure generated by the liquid ammonia flowing from bottom to top, the fixed blade on the exhaust device ensures the smooth rotation of the exhaust device, the movable blade on the exhaust device enables gas formed by the evaporation of a liquid ammonia film on the evaporation tube to be quickly dispersed, gas blockage is avoided, a new liquid ammonia film is quickly formed on the evaporation tube by the subsequent liquid ammonia, the heat exchange efficiency of the evaporation tube is improved, and the distribution of the liquid ammonia is more uniform by matching with, the technical problem of the hindrance of gas to liquid in the gas-liquid rotation process is solved.)

1. A cylindrical thin-film evaporator comprises a cylindrical shell (1), an evaporation pipe group (2) is arranged in the shell (1), and the evaporator is characterized in that the shell (1) comprises a cylindrical main body (11) with two open ends, and a water cover A (12) and a water cover B (13) which are hermetically arranged at the open ends of the cylindrical main body (11), an input port (111) for inputting a refrigerant is arranged at the bottom of the cylindrical main body (11), an output port (112) for outputting the refrigerant is arranged at the top of the cylindrical main body (11), a liquid inlet (121) and a liquid outlet (122) are respectively arranged at the lower part and the upper part of the water cover A (12), two groups of partition plates (14) are horizontally arranged in the water cover A (12), and the water cover A (12) is divided into a liquid inlet area (123), a transfer area (124) and a liquid outlet area (125) by the partition plates (14) from bottom to top, the liquid inlet area (123) is arranged right opposite to the liquid inlet (121), the liquid outlet area (125) is arranged right opposite to the liquid outlet (122), a group of partition plates (14) are horizontally arranged in the water cover B (13), the partition plates (14) divide the water cover B (13) into a communicating area A (131) and a communicating area B (132), the communicating area A (131) is communicated with the liquid inlet area (123) and the transferring area (124), the communicating area B (132) is communicated with the transferring area (124) and the liquid outlet area (125), the evaporating pipe group (2) is positioned in the cylinder main body (11), the evaporating pipe group (2) comprises a pipe plate (21), an evaporating pipe (22), a baffle plate (23) and a liquid supply pipe (24), the pipe plate (21) is respectively and hermetically arranged at openings at two ends of the cylinder main body (11), and the pipe plate (21) is matched with the cylinder main body (11) to form an evaporating chamber (113), the evaporation tubes (22) with two open ends are arranged between the tube plates (21), two ends of each evaporation tube (22) are respectively communicated with the space in the water cover A (12) and the space in the water cover B (13), the baffle plates (23) are sleeved on the evaporation tubes (22), the liquid supply tube (24) is arranged between the tube plates (21), the liquid supply tube (24) is communicated with the input port (111), and the lower part of the liquid supply tube (24) is provided with a liquid discharge hole (241);

the cover is equipped with air exhauster (3) that the rotation set up on evaporating pipe (22), and this air exhauster (3) are including fixed blade (31) and movable blade (32) that set up around the circumference revolution of evaporating pipe (22), fixed blade (31) revolution drives gas, rotation dispersion liquid ammonia carries out in the time of movable blade (32) revolution, the below of feed tube (24) is provided with shunt (4), shunt (4) are right feed tube (24) exhaust liquid ammonia shunts, and liquid ammonia after the reposition of redundant personnel is right the salt solution of circulation cools off in evaporating pipe (22), and the liquid ammonia drive after the reposition of redundant personnel shunt (4) are rotatory.

2. The cylindrical thin-film evaporator as claimed in claim 1, wherein salt liquid is introduced into the liquid inlet area (123) through the liquid inlet (121) and then discharged from the liquid outlet (122) through the communicating area A (131), the transition area (124), the communicating area B (132) and the liquid outlet area (125) in sequence, and the salt liquid flows in a serpentine shape in the evaporation tube (22).

3. The cylindrical thin film evaporator according to claim 1, wherein the air exhausters (3) are arranged at intervals, the air exhausters (3) are sleeved on any one evaporation tube (22) between the adjacent evaporation tubes (22), and the air exhausters (3) are not sleeved on the other evaporation tube (22).

4. The cylindrical thin film evaporator according to claim 1, wherein the exhauster (3) further includes:

lantern ring (33), lantern ring (33) rotate respectively set up in evaporating pipe (22) length direction's both ends, fixed blade (31) and movable blade (32) all erect along the length direction of evaporating pipe (22) on lantern ring (33).

5. The cylindrical film evaporator as claimed in claim 1, wherein a flow channel (311) is arranged in the hollow of any one of the fixed blades (31), an arc-shaped abutting plate (34) is arranged at the root of the fixed blade (31), an air inlet (312) is arranged above the abutting plate (34) and communicated with the flow channel (311), the abutting plate (34) is abutted and attached to the outer circumferential side wall of the evaporation tube (22), and a rotating air guide fan blade (313) is arranged in the flow channel (311).

6. The cylindrical thin film evaporator according to claim 5, characterized in that the distance from the root of the fixed vane (31) where no abutting plate (34) is provided to the circumferential side wall of the evaporation tube (22) is 2-10 mm.

7. The cylindrical thin film evaporator according to claim 5, wherein a driving unit (35) for driving the movable vane (32) and the air guide vane (313) to rotate is provided on the exhauster (3), and the driving unit (35) comprises:

a ring gear (351), wherein the ring gear (351) is fixedly arranged at two sides of the length direction of the exhaust ventilator (3), and the ring gear (351) and the collar (33) are arranged concentrically; and

and a gear (352), wherein the gear (352) is respectively arranged on the rotating shafts of the movable blade (32) and the air guide blade (313), and the gear (352) is meshed with the gear ring (351).

8. The cylindrical thin film evaporator according to claim 1, characterized in that the flow divider (4) comprises:

the flow distribution plate (41) is arranged in an arc shape, the flow distribution plate (41) is positioned under the liquid supply pipe (24), the flow distribution plate (41) is arranged over against the liquid discharge hole (241) on the liquid supply pipe (24) and reflects the liquid ammonia sprayed out from the liquid discharge hole (241) to the evaporation pipe (22), and the flow distribution plate (41) is arranged on the baffle plate (23) in a sliding mode along the vertical direction; and

and the spring piece (42) is arranged at the lower end part of the flow distribution plate (41), and the spring piece (42) drives the flow distribution plate (41) to reset.

9. The cylindrical thin film evaporator according to claim 8, wherein the upper end surface of the flow distribution plate (41) is provided with a plurality of ribs (411) along its own length direction, the ribs (411) being used for changing the reflection direction of the liquid ammonia.

10. The cylindrical thin film evaporator according to claim 8, wherein the two ends of the flow distribution plate (41) in the width direction are symmetrically provided with flow distribution grooves (42), the opening (421) at the side edge of the flow distribution groove (42) is arranged right opposite to the center line of the flow distribution plate (41), the upper end surface of the flow distribution groove (42) is provided with a plurality of flow distribution ports (421), the flow distribution ports (421) are provided with flow guide plates (422) which swing in a rotating manner, and the flow guide plates (422) are arranged at one side of the evaporation tube (22) in the width direction.

Technical Field

The invention relates to the technical field of mechanical structures of film evaporators, in particular to a cylindrical film evaporator.

Background

The film evaporator adopts the climbing film evaporation principle, a refrigerant is injected into the evaporator through a liquid supply distribution system at the bottom of the evaporator and is evaporated, the evaporated gas carries fine refrigerant droplets to move upwards in the ascending process, the droplets contact the wall surface of the heat exchange tube to form high-efficiency evaporation, a large heat exchange coefficient can be achieved, high-efficiency heat transfer is realized, and the film evaporator can save a large amount of heat exchange area compared with the traditional shell-and-tube evaporator under the same heat exchange condition.

In chinese patent No. CN101785930B, a tubular film evaporator is disclosed, which comprises a casing, a feed inlet and a vacuum exhaust port are provided at the top of the casing, a discharge outlet is provided at the bottom of the casing, at least one set of evaporation units is provided below the feed inlet in the casing, each set of evaporation unit comprises a material receiving funnel and a heat exchange tube, the heat exchange tube is vertically disposed and inserted into a round hole at the bottom of the material receiving funnel, an annular gap is provided between the periphery of the heat exchange tube and the material receiving funnel, when polyester is produced, the material flows downwards from the annular gap provided between the periphery of the heat exchange tube and the material receiving funnel, and flows downwards along the surface of the heat exchange tube in a film shape, meanwhile, heat exchange is performed between the material and the heat exchange tube, and byproducts generated by self-reaction continuously escape.

However, in the process of evaporative cooling of the tubular thin film evaporator disclosed in the above patent, the escaped gas product is wrapped outside the heat exchange tube, which can prevent subsequent liquid from contacting the heat exchange tube, and even if the liquid wraps the heat exchange tube, the gas generated by the liquid heat exchange can affect the heat exchange efficiency of the liquid.

Disclosure of Invention

In order to solve the problems, the invention provides a cylindrical thin-film evaporator which drives an exhaust device arranged on an evaporation tube to rotate by utilizing the force generated by the liquid ammonia flowing from bottom to top, a fixed blade on the exhaust device ensures the smooth rotation of the exhaust device, and a movable blade on the exhaust device enables gas formed by the evaporation of a liquid ammonia film on the evaporation tube to be rapidly dispersed, so that gas blockage is avoided, a new liquid ammonia film is rapidly formed on the evaporation tube by subsequent liquid ammonia, the heat exchange efficiency of the evaporation tube is improved, the liquid ammonia is distributed more uniformly by matching with the shunting action of a splitter on the liquid ammonia, and the technical problem of blockage of the gas on the liquid in the gas-liquid transfer process is solved.

In order to achieve the purpose, the invention provides the following technical scheme:

a cylindrical film evaporator comprises a cylindrical shell, an evaporating pipe group is arranged in the shell, the shell comprises a cylindrical main body with two open ends, and a water cover A and a water cover B which are hermetically arranged at the open ends of the cylindrical main body, an input port for inputting a refrigerant is arranged at the bottom of the cylindrical main body, an output port for outputting the refrigerant is arranged at the top of the cylindrical main body, a liquid inlet and a liquid outlet are respectively arranged at the lower part and the upper part of the water cover A, two groups of partition plates are horizontally arranged in the water cover A, the partition plates divide the water cover A into a liquid inlet area, a transition area and a liquid outlet area from bottom to top, the liquid inlet area is just opposite to the liquid inlet, the liquid outlet area is just opposite to the liquid outlet, a group of partition plates are horizontally arranged in the water cover B, and the partition plates divide the water cover B into a communicating area A and a communicating area B, the communication area A is communicated with the liquid inlet area and the transfer area, the communication area B is communicated with the transfer area and the liquid outlet area, the evaporation pipe group is positioned in the cylinder body and comprises pipe plates, evaporation pipes, baffle plates and liquid supply pipes, the pipe plates are respectively and hermetically arranged at openings at two ends of the cylinder body, the pipe plates are matched with the cylinder body to form an evaporation chamber, the evaporation pipes with openings at two ends are arranged between the pipe plates, two ends of each evaporation pipe are respectively communicated with spaces in the water cover A and the water cover B, the baffle plates are sleeved on the evaporation pipes, the liquid supply pipes are arranged between the pipe plates, the liquid supply pipes are communicated with the input ports, and the lower parts of the liquid supply pipes are provided with liquid discharge holes;

the cover is equipped with the air exhauster that rotates the setting on the evaporating pipe, and this air exhauster includes the fixed blade and the movable blade that set up around the circumference revolution of evaporating pipe, fixed blade revolution drives gas, carry out rotation dispersion liquid ammonia when the movable blade revolution, the below of feed pipe is provided with the shunt, the shunt is right feed pipe exhaust liquid ammonia shunts, and liquid ammonia after the reposition of redundant personnel is right the salt solution of circulation in the evaporating pipe cools off, and liquid ammonia after the reposition of redundant personnel drives the shunt is rotatory.

As an improvement, salt liquid is input into the liquid inlet area through the liquid inlet and then sequentially passes through the communicating area A, the transfer area, the communicating area B and the liquid outlet area to be discharged from the liquid outlet, and the salt liquid flows in the evaporating pipe in a snake shape.

As an improvement, the air exhausters are arranged at intervals, the air exhausters are sleeved on any evaporation pipe between adjacent evaporation pipes, and the air exhausters are not sleeved on the other evaporation pipe.

As a refinement, the exhaust stack further comprises:

the lantern ring, the lantern ring rotate respectively set up in evaporating pipe length direction's both ends, fixed blade and movable blade all erect along the length direction of evaporating pipe on the lantern ring.

As an improvement, a hollow flow channel is arranged inside any fixed blade, an arc-shaped abutting plate is arranged at the root of the fixed blade, an air inlet and a flow channel are arranged above the abutting plate, the abutting plate abuts against and is attached to the outer circumferential side wall of the evaporation tube, and a rotary air guide fan blade is arranged in the flow channel.

As a modification, the distance from the root of the fixed blade without the abutting plate to the circumferential side wall of the evaporating pipe is 2-10 mm.

As an improvement, the exhaust fan is provided with a driving unit for driving the movable blades and the air guide blades to rotate, and the driving unit comprises:

the gear rings are fixedly arranged on two sides of the length direction of the exhaust ventilator and are arranged concentrically with the lantern ring; and

and the gears are respectively arranged on the rotating shafts of the movable blades and the air guide blades and are meshed with the gear ring.

As an improvement, the flow splitter comprises:

the distribution plate is arranged in an arc shape and is positioned right below the liquid supply pipe, the distribution plate is arranged right opposite to the liquid discharge hole in the liquid supply pipe and reflects liquid ammonia sprayed from the liquid discharge hole to the evaporation pipe, and the distribution plate is arranged on the baffle plate in a sliding mode in the vertical direction; and

the spring piece is arranged at the lower end part of the flow distribution plate and drives the flow distribution plate to reset.

As an improvement, a plurality of convex strips are arranged on the upper end surface of the splitter plate along the length direction of the splitter plate, and the convex strips are used for changing the reflection direction of the liquid ammonia.

As an improvement, the two ends of the width direction of the splitter plate are symmetrically provided with splitter grooves, the openings of the side edges of the splitter grooves are right opposite to the central line of the splitter plate, the upper end face of each splitter groove is provided with a plurality of splitter ports, the splitter ports are provided with guide plates which swing in a rotating mode, and the guide plates are all located on one side of the width direction of the corresponding evaporating tubes.

The invention has the beneficial effects that:

(1) according to the invention, the force generated by the liquid ammonia flowing from bottom to top is utilized to drive the exhaust device arranged on the evaporation tube to rotate, the fixed blades on the exhaust device ensure the smooth rotation of the exhaust device, and the movable blades on the exhaust device enable the gas formed by the evaporation of the liquid ammonia film on the evaporation tube to be rapidly dispersed, so that gas blockage is avoided, a new liquid ammonia film is rapidly formed on the evaporation tube by the subsequent liquid ammonia, the heat exchange efficiency of the evaporation tube is improved, and the liquid ammonia is more uniformly distributed by matching with the flow splitting effect of the flow splitter on the liquid ammonia, so that the technical problem of liquid blockage caused by the gas in the gas-liquid rotation process is solved;

(2) according to the invention, the water cover A and the water cover B are separated by the partition plate to form the liquid inlet area, the transfer area, the liquid outlet area, the communication area A and the communication area B, so that salt liquid flows along a snake shape in the evaporation tube, the path of the salt liquid flowing in the evaporation tube is prolonged, the heat exchange between the salt liquid and liquid ammonia is more sufficient, and the cooling efficiency of the salt liquid is improved;

(3) the fixed blades of one group are hollow, and are matched with the abutting plate and the air guide blades, so that gas formed by liquid ammonia exchange is quickly discharged from the evaporation tube through guiding, and the gas discharged from the evaporation tube is further driven by the swing of the movable blades, so that the gas is quickly dispersed and discharged upwards;

(4) according to the invention, the liquid ammonia is divided by utilizing the reflection of the flow divider, the divided liquid ammonia can form disordered reflected liquid flow, the liquid flow is collided and ejected on the evaporation tube, so that a liquid film is formed on the surface of the evaporation tube, the heat exchange work of the evaporation tube is facilitated, and when the external liquid supply equipment stops inputting the liquid ammonia into the evaporation chamber, the flow divider can upwards reset by virtue of the spring piece, the liquid ammonia in the liquid supply tube is blocked by the flow divider and then is input into the evaporation chamber, so that the liquid ammonia is prevented from being gasified in the evaporation chamber to form higher air pressure, and the influence on the input of next liquid ammonia is avoided;

(5) the distributor is provided with the splitter box, the splitter box is used for ejecting liquid ammonia flow to the exhaust device, the liquid ammonia flow is used for driving the exhaust device on the evaporation tube to rotate, in addition, the exhaust device on the upper evaporation tube is driven by liquid flow or air flow formed by rotating and stirring the exhaust device on the lower part, and the exhaust devices interact with each other to form a plurality of vortexes for rapidly exhausting gas, so that the flow of the gas is accelerated;

(6) when the exhaust device is arranged, the root parts of one group of blades are provided with the abutting plates, the root parts of the other groups of blades do not abut against the evaporation tube, a space is reserved, and the gas is driven to leave the evaporation tube by scraping the abutting plates on the outer circumference of the evaporation tube, so that the liquid ammonia can break through the blockage of the gas and is attached to the evaporation tube to form a liquid film.

In conclusion, the heat exchanger has the advantages of ingenious structure, good heat exchange effect and the like, and is particularly suitable for the technical field of heat exchange structures.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the operation of the present invention;

FIG. 4 is a schematic perspective view of an evaporating tube set according to the present invention;

FIG. 5 is a schematic longitudinal cross-sectional view of an evaporator tube bank in accordance with the present invention;

FIG. 6 is a schematic view of the bottom structure of the evaporating tube set of the present invention;

FIG. 7 is a schematic perspective view of an exhaust stack according to the present invention;

FIG. 8 is a schematic view of a partial configuration of an exhaust stack according to the present invention;

FIG. 9 is a schematic cross-sectional view of an exhaust stack according to the present invention;

FIG. 10 is a schematic view of a flow channel structure according to the present invention;

FIG. 11 is a perspective view of a diverter according to the present invention;

fig. 12 is an enlarged view of a structure shown in fig. 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The first embodiment is as follows:

as shown in fig. 1 to 9, a cylindrical thin film evaporator includes a cylindrical housing 1, an evaporation tube group 2 is disposed in the housing 1, the housing 1 includes a cylindrical main body 11 with two open ends, and a water cover a12 and a water cover B13 hermetically disposed at the two open ends of the cylindrical main body 11, an input port 111 for inputting a refrigerant is disposed at the bottom of the cylindrical main body 11, an output port 112 for outputting the refrigerant is disposed at the top of the cylindrical main body 11, a liquid inlet 121 and a liquid outlet 122 are respectively disposed at the lower portion and the upper portion of the water cover a12, two groups of partition plates 14 are horizontally disposed in the water cover a12, the partition plates 14 divide the water cover a12 into a liquid inlet area 123, a transition area 124 and a liquid outlet area 125 from bottom to top, the liquid inlet area 123 is disposed opposite to the liquid inlet 121, the liquid outlet area 125 is opposite to the liquid outlet 122, a group of partition plates 14 is horizontally disposed in the water cover B13, the partition board 14 divides the water cover B13 into a communication area a131 and a communication area B132, the communication area a131 is communicated with the liquid inlet area 123 and the transition area 124, the communication area B132 is communicated with the transition area 124 and the liquid outlet area 125, the evaporation tube assembly 2 is located in the cylinder body 11, the evaporation tube assembly 2 includes a tube plate 21, evaporation tubes 22, baffle plates 23 and a liquid supply tube 24, the tube plate 21 is respectively and hermetically installed at openings at two ends of the cylinder body 11, the tube plate 21 is matched with the cylinder body 11 to form an evaporation chamber 113, a plurality of evaporation tubes 22 with two ends opened are arranged between the tube plate 21, two ends of the evaporation tubes 22 are respectively communicated with spaces in the water cover a12 and the water cover B13, the plurality of baffle plates 23 are sleeved on the evaporation tubes 22, the liquid supply tube 24 is arranged between the tube plates 21, the liquid supply tube 24 is communicated with the input port 111, a liquid discharge hole 241 is formed at the lower part of the liquid supply pipe 24;

the cover is equipped with the air exhauster 3 that rotates the setting on evaporating pipe 22, and this air exhauster 3 includes fixed blade 31 and the movable blade 32 that sets up around the circumference revolution of evaporating pipe 22, fixed blade 31 revolution drives gas, rotation dispersion liquid ammonia is carried out in the time of movable blade 32 revolution, the below of feed pipe 24 is provided with current divider 4, current divider 4 is right feed pipe 24 exhaust liquid ammonia shunts, and the liquid ammonia after the reposition of redundant personnel is right the salt solution of circulation cools off in evaporating pipe 22, and the liquid ammonia drive after the reposition of redundant personnel 4 is rotatory.

Further, after the salt liquid is inputted into the liquid inlet area 123 through the liquid inlet 121, the salt liquid is discharged from the liquid outlet 122 through the communication area a131, the transition area 124, the communication area B132 and the liquid outlet area 125 in sequence, and the salt liquid flows in a serpentine shape in the evaporation tube 22.

It should be noted that after the salt liquid is inputted into the liquid inlet area 123 from the liquid inlet 121, the salt liquid flows through the communicating area a131, the transition area 124, the communicating area B132 and the liquid outlet area 125 in sequence by the transportation of the evaporation tube 22, and after the cooling work of heat exchange is completed, the salt liquid is discharged from the liquid outlet 122, and the liquid ammonia (refrigerant) is inputted into the evaporation chamber 113 through the input port 111 to cool the salt liquid in the evaporation tube 22, and after the heat exchange between the liquid ammonia and the salt liquid in the evaporation tube 22 is completed, the liquid state is converted into the gas state and outputted from the output port 112, and the gas state is converted into the liquid state again and recycled in the compressor.

It is further described that the heat exchange between the salt solution in the evaporation tube 22 and the liquid ammonia in the evaporation chamber 113 is performed, so that during the cooling process of the salt solution, the liquid ammonia is converted from the liquid state to the gaseous state, and the formed gas is not discharged in time, so as to prevent the cooling effect of the subsequent liquid on the cooling tube, and the gas exhauster 3 is driven to operate by the cooperation of the flow of the liquid ammonia and the fixed blades 31, and the gas at the periphery of the evaporation tube 22 is guided upwards and discharged in time by the movable blades 32, so as to improve the heat exchange efficiency of the evaporation tube 22.

As shown in fig. 7 to 10, as a preferred embodiment, the exhaust pipes 3 are spaced apart from each other, and between the adjacent evaporation pipes 22, the exhaust pipe 3 is fitted to any one of the evaporation pipes 22, and the exhaust pipe 3 is not fitted to the other evaporation pipe 22.

Further, the exhaust stack 3 further includes:

the collars 33 are respectively rotatably disposed at two ends of the evaporation tube 22 in the length direction, and the fixed blades 31 and the movable blades 32 are both erected on the collars 33 in the length direction of the evaporation tube 22.

Furthermore, a flow channel 311 is disposed in any one of the fixed blades 31 in a hollow manner, an arc-shaped abutting plate 34 is disposed at the root of the fixed blade 31, an air inlet 312 is disposed above the abutting plate 34 and is communicated with the flow channel 311, the abutting plate 34 abuts against and is attached to the outer circumferential sidewall of the evaporation tube 22, and a rotating air guide fan blade 313 is disposed in the flow channel 311.

Further, the distance from the root of the fixed vane 31, which is not provided with the abutting plate 34, to the circumferential side wall of the evaporating tube 22 is 2 to 10 mm.

Preferably, the exhaust stack 3 is provided with a driving unit 35 for driving the movable vane 32 and the air guide vane 313 to rotate, and the driving unit 35 includes:

a ring gear 351 fixedly provided on both sides in the longitudinal direction of the exhaust stack 3, the ring gear 351 being provided concentrically with the collar 33; and

and a gear 352, wherein the gear 352 is provided on the rotation shaft of each of the movable blade 32 and the air guide blade 313, and the gear 352 is engaged with the ring gear 351.

It should be noted that the collar 33 is driven to rotate by the cooperation of the fixed blades 31 and the liquid ammonia flow, and in the rotating process of the collar 33, the gear 352 on the movable blade 32 is driven to cooperate with the gear ring 351, so as to achieve the purpose of self-rotating the movable blade 32 with the diffused gas.

It is further described that a set of the fixed blades 31 is provided with a flow channel 311, and the root of the fixed blades 31 is provided with an abutting plate 34, in the process of revolution of the fixed blades 31, the gas outside the evaporation tube 32 is guided by the gear 352 on the air guide fan blade 313 and the gear ring 351 to enter the flow channel 311 through the air inlet 312 and be rapidly discharged, and then the gas is rapidly discharged through diffusion of the movable blades 32, and the liquid ammonia can be diffused all around by the swing of the movable blades, so that the attachment amount of the liquid ammonia on the evaporation tube is uniform.

As shown in fig. 11 and 12, as a preferred embodiment, the flow divider 4 includes:

the flow dividing plate 41 is arranged in an arc shape, the flow dividing plate 41 is positioned right below the liquid supply pipe 24, the flow dividing plate 41 is arranged right opposite to the liquid discharge hole 241 on the liquid supply pipe 24 and reflects the liquid ammonia sprayed from the liquid discharge hole 241 to the evaporation pipe 22, and the flow dividing plate 41 is arranged on the baffle plate 23 in a sliding manner along the vertical direction; and

and a spring piece 42, wherein the spring piece 42 is provided at a lower end portion of the flow distribution plate 41, and the spring piece 42 drives the flow distribution plate 41 to return.

Further, a plurality of convex strips 411 are arranged on the upper end surface of the flow distribution plate 41 along the length direction of the flow distribution plate, and the convex strips 411 are used for changing the reflection direction of the liquid ammonia.

Furthermore, splitter 42 is installed to splitter 41 broad width direction both ends symmetry, and the opening 421 of this splitter 42 side is just right splitter 41's central line sets up, and a plurality of diffluence mouthful 421 have been seted up to this splitter 42's up end, and this diffluence mouthful 421 department is provided with rotatory wobbling guide plate 422, and this guide plate 422 all is located the correspondence one side of evaporating pipe 22 broad width direction, the both sides of guide plate 433 are provided with the guide block 4331 the same rather than rotatory swing orbit, are provided with curved guide way on the guide block 4331, and the guide way cooperates with guide post 4332, leads to the swing of guide plate 433 for guide plate 433 swings when liquid ammonia pressure is indefinite, swings, changes the liquid flow direction.

It should be noted that the splitter plate 41 reflects and scatters the liquid ammonia input from the liquid supply tube 24 to the evaporation chamber 113, the reflected liquid ammonia is sprayed to the evaporation tube 22 located at the bottom, and then a liquid film is formed on the evaporation tube 22 to cool the evaporation tube 22, and the exhaust device 3 on the evaporation tube 22 rotates by means of the liquid ammonia flow, so as to drive the vaporized gas on the evaporation tube 22 to flow, and at the same time, to drive the scattered liquid ammonia droplets to continuously diffuse upward.

Further, at the beginning, the flow distribution plate 41 is abutted against the liquid discharge hole 241 of the liquid supply pipe 24 by the elastic action of the spring piece 42, and when the pressure of the liquid ammonia discharged from the liquid discharge hole 241 is acted on the flow distribution plate 41, the flow distribution plate 41 moves downward to perform flow distribution reflection processing on the liquid ammonia, and the flow distribution plate 41 is provided with a convex strip 411 for distributing the liquid ammonia to form an irregular flow direction.

It should be noted that after the liquid ammonia output from the liquid supply pipe 24 hits the diversion plate 41, a part of the liquid ammonia enters the associated diversion groove 42 and is discharged to the outside through the diversion groove 42, so as to provide driving force for the exhaust fan 3, and thus the exhaust fan 3 can operate smoothly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.