Flash tank

Abstract

The invention discloses a flash tank, comprising: a tank body having an evaporation chamber, a gas phase outlet and a liquid phase drainage port communicated with the evaporation chamber; the fog drop interception assembly is installed in the evaporation cavity, the fog drop interception assembly comprises an outer interception piece, an inner interception piece and a partition piece, the fog drop interception assembly is divided into the inner interception piece and the outer interception piece, double channels are formed through the arrangement of the partition piece, steam generated by the multi-stage distributor can be drained in different channels, the steam drainage uniformity is improved, and the steam flow distribution efficiency is improved. The multi-stage distributors are arranged at intervals, the separators are used as boundaries, the distributors are respectively arranged inside and outside the separators, and the distributors which are arranged inside and outside are communicated with the double channels, so that the equipment space is utilized to the maximum extent, liquid flow is dispersed, steam is more easily formed, and a conventional arrangement mode of the multi-stage distributors is avoided; and the equipment size is too large.

Description

Technical Field

[0001] This application relates to the field of thermal equipment technology, and more particularly to a flash evaporator. Background Technology

[0002] In many industrial processes, flash evaporation is a key unit operation for rapidly depressurizing and partially vaporizing high-temperature, high-pressure fluids, thereby achieving efficient gas-liquid two-phase separation. Currently, the main equipment used for flash evaporation is the flash tank. The use of flash tanks reduces the waste of steam energy, recovering not only heat but also pressure energy, and offers greater operational flexibility compared to traditional pressure-reducing methods such as pressure-reducing valves.

[0003] However, in order to improve the efficiency of heat and pressure energy recovery and conversion of fluids, the traditional single-stage distributed baffles in flash tanks are no longer sufficient to meet the application requirements. Not only is the separation efficiency low, resulting in widespread mist entrainment in the rising vapor flow and insufficient release of light component gases, but it also increases the load on downstream condensers, compressors, or distillation columns. To address this, a multi-stage baffle arrangement with baffles perpendicular to the horizontal has been developed. However, this approach undoubtedly makes the flash tank larger, leading to space constraints and a large footprint. Furthermore, during the upward discharge of multiple layers of flash gas, recondensation is prone to occur, failing to alleviate mist entrainment. In view of these issues, this project was developed through in-depth research. Summary of the Invention

[0004] This application provides a flash evaporator, including: The tank body has an evaporation chamber, a gas phase outlet communicating with the evaporation chamber, and a liquid phase outlet; A droplet trapping assembly is installed inside the evaporation chamber. The droplet trapping assembly includes an outer trapping member and an inner trapping member, with the outer trapping member surrounding the outer peripheral surface of the inner trapping member. A separator, the separator being connected to the inner retaining member, the separator having a separation cavity, and the separation cavity communicating with the inner retaining member; A water inlet assembly is installed through the tank body and extends into the partition cavity. The water inlet assembly has a liquid outlet, and the liquid outlet is configured corresponding to the internal interception component. The distribution structure includes multiple sets of distributors, which are spaced apart along the vertical direction. In this configuration, at least one of the distributors is disposed inside the partition cavity, and at least one of the distributors is disposed outside the partition cavity. The steam generated by the distributor disposed inside the partition cavity flows out through the inner trapping member from the gas phase outlet, and the steam generated by the distributor disposed outside the partition cavity flows out through the outer trapping member from the gas phase outlet.

[0005] In some embodiments, the plurality of distributors includes an isolation distributor, an inner distributor, and an outer distributor. The inner distributor is disposed inside the partition cavity, and the outer distributor is disposed outside the partition cavity. The water inlet assembly is connected to the inner distributor, and the isolation distributor is connected to the partition member and closes the partition cavity.

[0006] In some embodiments, the internal distributor includes a first receiving plate, a baffle assembly, and an overflow ring; The first receiving plate is disposed on the side of the liquid outlet away from the inner interceptor to allow liquid to flow into the first receiving plate; the overflow ring is disposed on the first receiving plate, the baffle assembly is installed on the first receiving plate and the baffle assembly is located inside the overflow ring, and the first receiving plate and the inner wall of the separator are spaced apart to form the first flow channel.

[0007] In some embodiments, the baffle assembly includes: a plurality of baffle elements, which are arranged at intervals from the inside to the outside, each baffle element is arranged around the center of the first receiving plate, and each baffle element has a plurality of water passage holes; in two adjacent baffle elements, the plurality of water passage holes are staggered to form a first baffle flow channel.

[0008] In some embodiments, the isolation distributor includes: a second receiving plate and a plurality of overflow baffles; The second receiving plate is connected to the inner wall of the partition cavity. The second receiving plate is provided with a plurality of overflow baffles. The plurality of overflow baffles protrude from the surface of the second receiving plate relative to the inner distributor, and the overflow baffles have overflow grooves. The overflow grooves penetrate the second receiving plate to form the second flow channel.

[0009] In some embodiments, a plurality of the overflow baffles are spaced apart to form the second deflector channel.

[0010] In some embodiments, the external distributor includes: a third receiving plate, a downcomer plate, and an overflow baffle; The third receiving plate is installed on the downcomer plate, and the third receiving plate has a receiving part at its center. The receiving part corresponds to the second flow channel. The downcomer plate is spaced from the inner wall of the tank to form a third flow channel. An overflow baffle is provided on the third receiving plate.

[0011] In some embodiments, the overflow baffle includes multiple annular overflow members, each of which is arranged around the receiving portion. The annular overflow members protrude from the surface of the third receiving plate, and the multiple annular overflow members are arranged at intervals from the inside to the outside to form a third deflector channel.

[0012] In some embodiments, the evaporation chamber is further provided with a liquid receiving ring plate, which abuts against the inner wall of the evaporation chamber so that the liquid receiving ring plate can receive the liquid flowing down from the third flow channel. The center of the liquid receiving ring plate is provided with a drain port, which is connected to the liquid phase drain port.

[0013] In some embodiments, the water inlet assembly is equipped with a liquid-blocking cap, which is spaced apart on the liquid outlet.

[0014] The beneficial effects of this application are as follows: The flash tank is equipped with a droplet trapping component, which consists of an inner trapping component and an outer trapping component. Through the setting of the separator, the inner trapping component and the outer trapping component form a dual channel, so that the steam generated by the multi-stage distributor can be discharged through different channels, thereby improving the uniformity of steam discharge and reducing the entrainment effect of mist.

[0015] The multi-stage distributors in the distribution structure are arranged at intervals, with the separators serving as boundaries. The distributors are placed inside and outside the separators, and the distributors inside and outside are connected to the dual channels of the inner and outer interceptors, respectively. This not only completes multiple flash vaporization processes and maximizes the use of equipment space, but also disperses the liquid flow and makes it easier to form steam. Furthermore, it avoids the conventional arrangement of multi-stage distributors, which results in an excessively large equipment volume. This reduces the equipment volume and prevents the steam flow from accumulating or condensing in contact with the distributor, thus forming suspended droplets. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the blasting structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the isolation distributor structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal distributor structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the external distributor structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the liquid receiving ring plate structure according to an embodiment of the present invention; In the diagram: 1. Tank body; 2. Droplet interception assembly; 3. Water inlet assembly; 4. Distribution structure; 5. Separator; 11. Gas phase outlet; 12. Liquid phase outlet; 13. Inspection port; 21. External interception component; 22. Internal interception component; 31. Liquid baffle cap; 41. Isolation distributor; 42. Internal distributor; 43. External distributor; 44. Liquid receiving ring plate; 411. Second receiving plate; 412. Overflow baffle; 421. First receiving plate; 422. Baffle assembly; 423. Overflow ring; 431. Third receiving plate; 432. Downcomer plate; 433. Overflow baffle; 441. Drain port. Detailed Implementation

[0017] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0019] The application of flash evaporators in thermal systems effectively saves thermal and pressure energy, making them an important component of modern thermal systems. The use of flash evaporators reduces the waste of steam energy, recovering not only heat but also pressure energy, and offers greater operational flexibility compared to traditional pressure-reducing methods such as pressure-reducing valves.

[0020] However, in order to increase the amount of steam generated and avoid wasting heat and pressure energy, current flash tanks usually adopt the form of baffles, which make the water flow more turbulent and the water flow more dispersed, making it easier to form steam. However, traditional single-stage baffle distribution plates not only have low separation efficiency, resulting in the presence of mist entrainment in the rising steam flow and insufficient release of light component gases, but also increase the load on downstream condensers, compressors or distillation columns.

[0021] To address this, there are currently methods that use multi-stage distribution discs to increase the number of stages through which the water flows, thereby improving flash evaporation efficiency. However, this inevitably results in a larger flash tank, leading to space constraints and a large footprint. Furthermore, during the upward discharge of multi-layered flash gas, recondensation can easily occur, failing to mitigate the entrainment of mist.

[0022] To address the aforementioned problems, this application discloses a flash evaporator, comprising: a tank body 1 having an evaporation chamber, a gas phase outlet 11 communicating with the evaporation chamber, and a liquid phase outlet 12; a droplet trapping assembly 2 installed within the evaporation chamber, the droplet trapping assembly 2 comprising: an outer trapping member 21 and an inner trapping member 22, the outer trapping member 21 being arranged around the outer peripheral surface of the inner trapping member 22; a separator 5 connected to the inner trapping member 22, the separator 5 having a separator cavity communicating with the inner trapping member 22; a water inlet assembly 3 passing through the tank body 1 and extending into the separator cavity; and a distribution structure 4 comprising multiple sets of distributors spaced apart along the vertical direction.

[0023] Tank 1 is the main container for flash evaporation. The evaporation chamber inside tank 1 is the space for flash evaporation. The water inlet assembly 3 introduces high-temperature water from the thermal system into the partition chamber of the evaporation chamber. The water inlet assembly 3 has a liquid outlet that is perpendicular to the horizontal and faces upward. During the water flow, some of the gravitational potential energy is offset. Through the multi-stage distributor of the distribution structure 4, the liquid flow is distributed layer by layer from top to bottom, making it easier to form steam and thus fully release the thermal energy and pressure potential energy of the water.

[0024] According to the instruction manual Figure 1-5 It can be seen that the mist interception component 2 can intercept mist droplets in steam, reduce mist entrainment, and the mist interception component 2 is divided into an inner interception component 22 and an outer interception component 21. The inner interception component 22 and the outer interception component 21 together cover the horizontal cross section of the tank body 1. The separator 5 can be a tubular structure. The separator 5 is spaced from the inner wall of the tank body 1 and communicates with the inner interception component 22 to form two steam evaporation channels.

[0025] In this configuration, with the separator 5 as the boundary, among the multiple groups of distributors, at least one distributor is located inside the separator chamber, and at least one distributor is located outside the separator chamber. The steam generated by the distributor located inside the separator chamber flows out through the gas phase outlet 11 via the inner trap 22, while the steam generated by the distributor located outside the separator chamber flows out through the outer trap 21 via the gas phase outlet 11. This not only allows the multi-stage distributors to be arranged at intervals, completing multiple top-to-bottom hierarchical distributions of the distributors and enhancing the liquid flash vaporization process, but also maximizes the utilization of equipment space. At the same time, due to the existence of two steam channels, the steam generated by the distributors located inside and outside the separator 5 can pass through the droplet trap 2 via the two channels, thereby improving the uniformity of steam discharge and reducing the mist entrainment effect.

[0026] After the evaporation process, the unevaporated liquid falls onto the distributor outside the partition chamber, where it is further deflected and dispersed to facilitate the formation of steam. This not only achieves the purpose of dispersing and distributing the liquid flow and improving the flash evaporation efficiency, but also, due to the separation effect of the partition 5, the external steam can only enter the gas phase outlet 11 through the external interceptor 21, reducing the working pressure of the mist interception component 2. At the same time, it makes the steam discharge distribution more uniform, avoiding the phenomenon of reduced throughput caused by steam gathering towards the center and mist entrainment caused by steam accumulation.

[0027] In some embodiments of this application, the tank 1 is the main space for flash evaporation. To ensure the stability of the tank 1, multiple support legs should be distributed at the bottom of the tank 1 to improve stability and facilitate the adjustment of the height of the tank 1. The tank 1 should also be provided with an inspection port 13, through which the inside of the tank 1 can be easily inspected. The tank 1 should also be provided with a pressure sensor and a temperature sensor.

[0028] In some embodiments of this application, multiple distributors are used, including at least an isolation distributor 41, an inner distributor 42, and an outer distributor 43. The distributor inside the partition cavity is the inner distributor 42, and the distributor outside the partition cavity is the outer distributor 43. The isolation distributor 41 separates the inner and outer spaces of the partition cavity. It should be noted that the isolation distributor 41 can be located inside the partition cavity or can block the bottom end of the partition member 5.

[0029] Multiple distributors are spaced out from top to bottom, forming a hierarchical, dispersed distribution range, such as... Figure 1 As shown in the example, the inner distributor 42 corresponds to the inner partition 5 and the steam evaporation channel formed by the partition cavity. At the same time, since the isolation distributor 41 forms a seal with the partition cavity, the steam generated by the isolation distributor 41 will also be discharged through the inner interceptor 22 and the unvaporized liquid will be discharged through the central flow channel of the isolation distributor 41. Since the liquid flows out from the central flow channel, it can seal the partition cavity, so that the steam generated by the outer distributor 43 is discharged through the outer interceptor 21 and cannot be discharged from the partition cavity.

[0030] In some embodiments of this application, the inner distributor 42 includes: a first receiving plate 421, a baffle assembly 422, and an overflow ring 423; the first receiving plate 421 is disposed on the side of the liquid outlet opposite to the inner retaining member 22, so as to allow liquid to be introduced into the first receiving plate 421; the overflow ring 423 is disposed on the first receiving plate 421, the baffle assembly 422 is installed on the first receiving plate 421, and the baffle assembly 422 is located inside the overflow ring 423, and the first receiving plate 421 and the inner wall of the separator 5 are spaced apart to form a first flow channel.

[0031] like Figure 4As shown, the water fed by the water inlet component 3 is sprayed upward and falls onto the first receiving plate 421. The flow deflector is set on the first receiving plate 421 and has a first flow deflector channel. The liquid flows from the center to the periphery of the first receiving plate 421 in an alternating manner, promoting the vaporization flash evaporation process. The generated steam is intercepted by the inner interceptor 22 to remove the entrained mist. Under the blocking effect of the overflow ring 423, when the water level on the first receiving plate 421 accumulates to a certain height exceeding the height of the overflow ring 423, it flows out from outside the overflow ring 423.

[0032] In some embodiments of this application, the first baffle channel is formed by multiple baffles arranged in an alternating manner, and the multiple baffles form a first baffle channel. Since there is a gap between the inner wall of the separator 5 and the first receiving plate 421, the overflowing liquid flows downward.

[0033] In some embodiments of this application, the isolation distributor 41 includes: a second receiving plate 411 and a plurality of overflow baffles 412; the second receiving plate 411 is connected to the inner wall of the partition cavity, and a plurality of overflow baffles 412 are provided on the second receiving plate 411. The plurality of overflow baffles 412 protrude from the surface of the second receiving plate 411 relative to the inner distributor 42, and the overflow baffles 412 have overflow grooves that penetrate the second receiving plate 411 to form a second flow channel.

[0034] According to the instruction manual Figure 3 It is known that the second receiving plate 411 is set at the bottom of the separator 5. Excess liquid left by the first flow channel drips onto the second receiving plate 411. Since the multiple overflow baffles 412 on the second receiving plate 411 are higher than the surface of the second receiving plate 411, the multiple overflow baffles 412 are spaced apart to form a second baffle flow channel, so that the water falling onto the second receiving plate 411 is dispersed and flows in a staggered manner, promoting the flash vaporization process. Since the second receiving plate 411 and the separator 5 are connected to form an approximately cylindrical container, as the water level rises, the overflow groove on the overflow baffle 412 extends to the second receiving plate 411, so that the liquid flows out from the second flow channel and enters the outside of the separator cavity, where it continues to evaporate in the evaporation cavity.

[0035] In some embodiments of this application, the external distributor 43 includes: a third receiving plate 431, a downcomer plate 432, and an overflow baffle 433; the third receiving plate 431 is installed on the downcomer plate 432, and the center of the third receiving plate 431 has a receiving part, which corresponds to the second flow channel; the downcomer plate 432 is spaced from the inner wall of the tank 1 to form a third flow channel; and the overflow baffle 433 is provided on the third receiving plate 431.

[0036] According to the instruction manual Figure 5It is known that the third receiving plate 431 is located below the second receiving plate 411. Under the action of gravity, the liquid that is not completely vaporized flows down from the second flow channel and falls onto the third receiving plate 431. An overflow baffle 433 is provided on the third receiving plate 431. The overflow baffle 433 disperses the liquid more easily and makes it easier to form steam through the baffle distribution.

[0037] In some embodiments of this application, the overflow baffle 433 includes a plurality of annular overflow members, each of which is arranged around the receiving portion. The annular overflow members protrude from the surface of the third receiving plate 431, and the plurality of annular overflow members are arranged at intervals from the inside to the outside to form a third deflector channel.

[0038] Multiple annular overflow components are arranged in a communication ring array, and a third deflection channel is formed between the multiple annular overflow components. Small holes are punched all over the annular overflow components. Due to the rising airflow, there will be a lifting effect, and the liquid will bubble on the liquid layer through the small holes to exchange heat, thereby improving the steam generation efficiency. After the liquid falls into the third receiving plate 431, due to the existence of the third channel, the water will be dispersed from the inside to the outside, making it easier for steam to form. When the water overflows the last outermost overflow baffle, the water flows down the outside of the downcomer plate 432. The outside of the downcomer plate 432 is separated from the inner wall of the tank 1, thus forming the third channel. The downcomer plate 432 also serves as the installation base for the third receiving plate 431.

[0039] In some embodiments of this application, a liquid receiving ring plate 44 is also provided in the evaporation chamber. The liquid receiving ring plate 44 abuts against the inner wall of the evaporation chamber so that the liquid receiving ring plate 44 can receive the liquid flowing down from the third flow channel. A drain port 441 is provided at the center of the liquid receiving ring plate 44, and the drain port 441 is connected to the liquid phase drain port 12.

[0040] The liquid receiving ring plate 44 in the evaporation chamber acts as a distributor closer to the bottom of the tank 1. The liquid flowing down from the third flow channel falls into the liquid receiving ring plate 44 and is distributed and dispersed in the liquid receiving ring plate 44. Under the action of high temperature, these liquids form steam, while the water that fails to form steam will gather towards the middle drain port 441. The drain port 441 is higher than the liquid receiving ring plate 44. After the water flows over the edge of the drain port 441, it falls from the drain port 441 into the bottom of the evaporation chamber and the excess liquid is discharged from the liquid phase drain port 12.

[0041] In some embodiments of this application, a liquid-blocking cap 31 is installed on the water inlet assembly 3. The liquid-blocking cap 31 is spaced apart on the liquid outlet. In order to reduce the mist entrainment phenomenon and reduce the working pressure of the mist interception assembly 2, the liquid outlet of the water inlet assembly 3 is oriented upward. During the water spraying process, the gravitational potential energy is offset to reduce part of the impact force and avoid the formation of small droplets. At the same time, the liquid-blocking cap 31 forms a diversion and blocking effect, so that the impact force when the liquid falls into the inner distributor 42 is not too large and is more uniform. Furthermore, the liquid outlet can be set in the center of the inner distributor 42, which facilitates the installation of the inner distributor 42 and reduces the distance between the inner distributor 42 and the liquid outlet.

[0042] In summary, the flash tank using the solution of this application has the following advantages: 1) The flash tank has a droplet interception component 2, which is divided into an inner interception component 22 and an outer interception component 21. Through the setting of the separator 5, the inner interception component 22 and the outer interception component 21 form a dual channel, so that the steam generated by the multi-stage distributor can be discharged through different channels, improving the uniformity of steam discharge and reducing the mist entrainment effect.

[0043] 2) The multi-stage distributors of the distribution structure 4 are arranged at intervals, with the separator 5 as the boundary. The distributors are arranged inside and outside the separator 5 respectively, and the distributors arranged inside and outside are connected to the dual channels of the inner interceptor 22 and the outer interceptor 21 respectively. This not only completes multiple flash vaporization processes and maximizes the use of equipment space, but also disperses the liquid flow and makes it easier to form steam. It also avoids the conventional arrangement of multi-stage distributors, which would result in an excessively large equipment volume. This reduces the volume of the equipment and avoids the accumulation of steam flow or contact with the distributor to cause condensation and form suspended droplets.

[0044] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0045] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0046] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0047] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A flash tank characterized in that, The application relates to a water tank, which comprises the following components: a tank body, which has an evaporation cavity, a gas-phase outlet communicating with the evaporation cavity and a liquid-phase discharge port; a mist droplet interception assembly installed in the evaporation cavity, which comprises an outer interception member and an inner interception member, the outer interception member being arranged around the outer circumferential surface of the inner interception member; a partition member connected to the inner interception member, the partition member having a partition cavity in the partition member, and the partition cavity communicating with the inner interception member; a water inlet assembly penetrating through the tank body and penetrating into the partition cavity, the water inlet assembly having a liquid outlet, and the liquid outlet corresponding to the inner interception member; a distribution structure comprising a plurality of groups of distributors, the groups of distributors being spaced apart along a vertical direction; at least one of the distributors is arranged in the partition cavity, and at least one of the distributors is arranged outside the partition cavity, the distributors arranged in the partition cavity form steam which flows out of the gas-phase outlet through the inner interception member, and the distributors arranged outside the partition cavity form steam which flows out of the gas-phase outlet through the outer interception member.

2. A flash tank according to claim 1, characterized in that The plurality of groups of distributors comprise isolated distributors, inner distributors and outer distributors, the inner distributors are arranged in the partition cavity, the outer distributors are arranged outside the partition cavity, the water inlet assembly is connected to the inner distributors, the isolated distributors are connected to the partition member, and the isolated distributors seal the partition cavity.

3. A flash tank according to claim 2, wherein The inner distributors comprise a first receiving plate, a baffle assembly and an overflow ring; the first receiving plate is arranged on the side of the liquid outlet away from the inner interception member, so that liquid is introduced into the first receiving plate; the overflow ring is arranged on the first receiving plate, the baffle assembly is installed on the first receiving plate, and the baffle assembly is located in the overflow ring, and the first receiving plate and the inner wall of the partition member have a spacing to form a first flow channel.

4. A flash tank according to claim 3, wherein The baffle assembly comprises a plurality of baffles, the plurality of baffles are sequentially and spaced apart from inside to outside, each baffle is arranged around the center of the first receiving plate, and each baffle has a plurality of water through holes; in the two adjacent baffles, the plurality of water through holes are staggered to form a first baffle flow channel.

5. A flash tank according to claim 2, wherein, The isolated distributors comprise a second receiving plate and a plurality of overflow blocks; the second receiving plate is connected to the inner wall of the partition cavity, the second receiving plate is provided with a plurality of overflow blocks, the plurality of overflow blocks protrude from the surface of the second receiving plate relative to the inner distributors, and the overflow blocks have overflow grooves, the overflow grooves penetrate through the second receiving plate to form a second flow channel.

6. A flash tank according to claim 5, wherein The plurality of overflow blocks are spaced apart to form a second baffle flow channel.

7. A flash tank according to claim 5, wherein The outer distributors comprise a third receiving plate, a downcomer plate and an overflow partition; the third receiving plate is installed on the downcomer plate, and the third receiving plate has a receiving part in the center, the receiving part corresponds to the second flow channel, the downcomer plate has a spacing with the inner wall of the tank body to form a third flow channel, and the third receiving plate is provided with an overflow partition.

8. A flash tank according to claim 7, wherein The overflow baffle comprises a plurality of annular overflow members, any of which is annularly arranged on the receiving part and protrudes from the surface of the third receiving plate, and the plurality of annular overflow members are arranged in intervals from inside to outside to form a third flow deflection flow channel.

9. A flash tank according to claim 8, wherein, The evaporation cavity is further provided with a liquid receiving ring plate which abuts against the inner wall of the evaporation cavity so that the liquid receiving ring plate can receive the liquid flowing down from the third flow channel, and the center of the liquid receiving ring plate is provided with a liquid discharge port which communicates with the liquid phase discharge port.

10. The flash tank of claim 1, wherein, The water inlet assembly is provided with a liquid blocking cap which is arranged in intervals on the liquid outlet.

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