CN219449372U

CN219449372U - Evaporation condenser and sewage electrodialysis desalination treatment system

Info

Publication number: CN219449372U
Application number: CN202320591446.0U
Authority: CN
Inventors: 苏勇; 刘杨; 黄杰
Original assignee: Sichuan Zhongqing Ruike New Energy Technology Co ltd
Current assignee: Sichuan Zhongqing Ruike New Energy Technology Co ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-08-01
Anticipated expiration: 2033-03-23

Abstract

The application discloses evaporation condenser and sewage electrodialysis desalination treatment system, evaporation condenser includes the shell body, and set up evaporation condensing unit in the shell body, evaporation condensing unit includes the multi-disc fin that installs in the shell body fixedly, and the reciprocal steam pipe that encircles and run through setting up in arbitrary fin, the both ends of steam pipe are first steam inlet and steam outlet respectively, arbitrary be parallel to each other and vertical setting between the fin; the electrodialysis desalination treatment system for sewage comprises a dialysis tank for electrodialysis and an evaporation and condensation mechanism comprising at least one evaporation condenser for evaporation and condensation, respectively.

Description

Evaporation condenser and sewage electrodialysis desalination treatment system

Technical Field

The utility model relates to the technical field of environmental protection, in particular to the technical field of a device for removing salt ions in sewage, and specifically relates to an evaporation condenser and a sewage electrodialysis desalination treatment system.

Background

Electrodialysis is a combination of electrochemical and dialysis diffusion processes; under the drive of an externally applied direct current electric field, the selective permeability of the ion exchange membrane (namely cations can permeate the cation exchange membrane and anions can permeate the anion exchange membrane) is utilized, and the anions and the cations respectively move to the anode and the cathode. In the ion migration process, if the fixed charge of the membrane is opposite to the charge of the ions, the ions can pass through; if the charges of the ions are the same, the ions are repelled, so that the purposes of solution desalination, concentration, refining or purification and the like are realized, and the technology is a mature technology applied in industry.

The sewage treated by electrodialysis can generate three kinds of water, namely fresh water, concentrated water and extreme water; the fresh water is water which does not contain negative anions and metal cations basically, is an ideal object for sewage treatment, the concentrated water is sewage with high concentration of anions and cations, the polar water is water with a large amount of anions and little cations or a large amount of cations and little anions, and the polar water and the concentrated water are not ideal objects for sewage treatment, and chemical treatments such as oxidation, reduction, replacement and the like are carried out before harmless emission. In view of this, when the same sewage is treated, the higher the ratio of the fresh water amount generated, the smaller the ratio of the concentrated water amount to the extremely water amount, and the lower the pressure for the subsequent treatment of the concentrated water amount and the extremely water amount.

The system for treating the concentrated water by physical distillation and condensation can be used for carrying out evaporation, concentration and crystallization treatment on the high-concentration concentrated water, so that the separation of salt in sewage and the fresh water is realized.

Disclosure of Invention

In order to solve the sewage desalination problem, the application provides an evaporation condenser and a sewage electrodialysis desalination treatment system, and sewage electrodialysis desalination treatment systems with different evaporation and condensation stages can be formed through flexible combination of the evaporation condenser, so that sewage treatment with different salt ion concentrations is adapted. In the whole evaporation and condensation process, only steam heat is consumed, other energy consumption investment is not needed, and the gravity flow and discharge of the sewage are utilized in the sewage desalination process, so that the low-energy consumption treatment is realized in the whole process.

As the structure bright point of this application, this application adopts a plurality of evaporative condenser to connect, can realize the function of evaporimeter simultaneously through letting in high temperature steam or low temperature fresh water, also can realize the function of condenser, realizes low energy consumption evaporative condensation. Because the evaporators and the condensers in the system are of the same structure, only different pipelines are connected, and mediums with different temperatures are introduced, the modularization degree of the whole system is high, and the subsequent operation and maintenance cost is lower.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

the evaporative condenser comprises an outer shell and an evaporative condensing unit arranged in the outer shell, wherein the evaporative condensing unit comprises a plurality of radiating fins fixedly arranged in the outer shell, a steam pipe which is arranged in any radiating fin in a reciprocating encircling and penetrating mode, a first steam inlet and a steam outlet are respectively arranged at two ends of the steam pipe, and any radiating fins are mutually parallel and vertically arranged;

the evaporator comprises an outer shell, an evaporation condensing unit, an upper flow divider and a lower flow divider, wherein the upper flow divider is arranged at the upper end of the evaporation condensing unit, the lower flow divider is arranged at the bottom of the evaporation condensing unit, the upper flow divider is connected with a water inlet extending to the outside of the outer shell, the lower flow divider is connected with a second steam inlet extending to the outside of the outer shell, and the upper flow divider and the lower flow divider are respectively provided with a plurality of through holes with diameters of 1mm-2mm for sewage or steam to circulate;

the top of the outer shell is provided with an exhaust port for steam to escape, and the bottom of the outer shell is provided with a water outlet for sewage to be discharged.

The application also provides a sewage electrodialysis desalination treatment system, which comprises a dialysis tank and an evaporation and condensation mechanism, wherein the dialysis tank comprises a fresh water chamber and a concentrated water chamber, and the fresh water chamber and the concentrated water chamber are respectively communicated with the evaporation and condensation mechanism through a fresh water branch pipe and a concentrated water branch pipe for heat exchange and then are respectively discharged through a first discharge port and a second discharge port; and a steam generating device for supplying high-temperature steam to any one of the evaporators through the first steam inlet and the steam outlet, the evaporation and condensation mechanism comprising at least one evaporation condenser as described above for evaporating and condensing, respectively.

Preferably, the evaporation and condensation mechanism comprises a first evaporator and a first condenser, and the first evaporator and the first condenser adopt the evaporation and condenser;

the water inlet of the first evaporator is communicated with the concentrated water branch pipe through a flow valve, the air outlet of the first evaporator is communicated with the second steam inlet of the first condenser through a first one-way valve, a steam generating device for generating high-temperature steam is arranged between the first steam inlet and the steam outlet of the first evaporator, the water outlet arranged at the bottom of the first evaporator is used as a second discharge outlet for discharging sewage, and the second steam inlet in the first evaporator is closed;

the fresh water branch pipe is respectively communicated with the water inlet and the first steam inlet of the first condenser, the steam outlet and the water outlet of the first condenser are mutually communicated to form a first discharge outlet, and the air outlet of the first condenser is closed.

Further preferably, in order to further enhance the evaporative condensing effect, the application can further treat sewage requiring multistage evaporative condensing treatment by connecting a plurality of evaporators/condensers for the sewage which is not high enough in salt concentration in the concentrated water after electrodialysis. And as one of the preferable modes, the evaporator also comprises a second evaporator and a second condenser, the second evaporator and the second condenser are both structured by adopting the evaporation condenser,

the water outlet of the first evaporator is communicated with the water inlet of the second evaporator, the water outlet of the second evaporator is communicated with the water inlet of the second condenser, one end of the steam generating device is communicated with the first steam inlet of the first evaporator, the steam outlet of the first evaporator is communicated with the first steam inlet of the second evaporator, the steam outlet of the second evaporator is communicated with the other end of the steam generating device, and the air outlet of the second evaporator is communicated with the lower flow divider of the first condenser through a second one-way valve; the fresh water branch pipe is communicated with a first steam inlet of a second condenser, a steam outlet of the second condenser is communicated with a water outlet of the first condenser to form a first discharge outlet for discharging fresh water, and a water outlet of the second condenser is a second discharge outlet for discharging condensed crystal concentrated water; the second steam inlet of the second evaporator is closed, and the second steam inlet and the exhaust port of the second condenser are closed.

In order to reduce the yield of electrodialysis thick water and improve the salt concentration in the thick water as much as possible, preferably, a plurality of partition plates for dividing the tank body into a plurality of fresh water chambers are installed in the dialysis tank, each partition plate comprises a partition frame serving as a framework main body, an anion exchange membrane and a cation exchange membrane which are respectively arranged on two sides of the partition frame, and a first pressing structure and a second pressing structure which are detachably and fixedly connected with the partition frame and used for fixedly pressing the anion exchange membrane and the cation exchange membrane on the partition frame, and a raw water inlet for injecting raw water and a thick water outlet for discharging thick water are respectively arranged on the partition frame.

In order to facilitate the replacement of the concentrated water, preferably, the raw water inlet is arranged at the upper end of the bulkhead, and the concentrated water outlet is arranged at the lower end of the bulkhead.

In order to improve the condition that the concentrated water is increased due to the fact that the raw water is mixed into the concentrated water and then discharged along with the concentrated water in the concentrated water replacement process as much as possible, the raw water inlet and the concentrated water outlet are arranged at the upper end of the bulkhead, and the concentrated water outlet extends into the bulkhead to a position close to the bottom through a pipeline.

In order to avoid the anion exchange membrane and the cation exchange membrane from being loosened under pressure, a compression-resistant cage is preferably arranged in the bulkhead.

The beneficial effects are that:

1. the evaporative condenser provided by the utility model can be used as an evaporator or a condenser according to actual needs, and can realize one-stage or multi-stage evaporation/condensation treatment through the connection of a plurality of evaporative condensers, so that good treatment can be realized for concentrated water with different salt concentrations, and the compatibility is high; furthermore, the evaporative condenser that this application provided can satisfy the upgrading transformation of current electrodialysis system, and the practicality is strong.

2. The treatment system provided by the utility model can realize uninterrupted treatment of the concentrated water after electrodialysis by only one boiler for providing steam, has high efficiency and low energy consumption, and can efficiently separate fresh water after treatment with high saturation.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic diagram of the system architecture of the present application.

Fig. 2 is a schematic structural diagram of the evaporative condenser.

Fig. 3 is a structural isometric view of a separator.

In the figure: 100-dialysis tank; 11-a tank body; 12-a separator; 13-a fresh water chamber; 14-a concentrated water chamber; 15-a concentrated water branch pipe; 16-fresh water branch pipes; 200-an evaporation and condensation mechanism; 21-a flow valve; 22-a first evaporator; 23-a second evaporator; 24-a first one-way valve; 25-a second one-way valve; 26-steam generating means; 27-a first discharge port; 28-a second outlet; 300-an evaporative condenser; 31-a water inlet; 32-exhaust port; 33-upper diverter; 34-a first steam inlet; 35-radiating fins; 36-steam pipe; 37-steam outlet; 38-a lower diverter; 39-water outlet; 40-a second steam inlet; 121-a first press-fit structure; 122-anion exchange membrane; 123-compression cage; 124-formers; 1241-concentrated water outlet; 1242-raw water inlet; 125-cation exchange membrane; 126-second press-fit structure.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Example 1:

an evaporative condenser shown in fig. 2 in combination with the specification comprises an outer shell and an evaporative condensing unit arranged in the outer shell, wherein the evaporative condensing unit comprises a plurality of radiating fins 35 fixedly arranged in the outer shell, a steam pipe 36 which is reciprocally wound around and penetrates through any radiating fin 35, two ends of the steam pipe 36 are respectively provided with a first steam inlet 34 and a steam outlet 37, and any radiating fins 35 are mutually parallel and vertically arranged;

the evaporator further comprises an upper flow divider 33 arranged at the upper end of the evaporation condensing unit and a lower flow divider 38 arranged at the bottom of the evaporation condensing unit, wherein the upper flow divider 33 is connected with a water inlet 31 extending to the outside of the outer shell, the lower flow divider 38 is connected with a second steam inlet 40 extending to the outside of the outer shell, and the upper flow divider 33 and the lower flow divider 38 are respectively provided with a plurality of through holes with diameters of 1mm-2mm for sewage or steam to flow through;

the top of the outer shell is provided with an exhaust port 32 for steam to escape, and the bottom of the outer shell is provided with a water outlet 39 for sewage to be discharged.

Structure and working principle:

the water inlet 31 and the second steam inlet 40 are both structures for dispersing a fluid medium, for example, dispersing water into a plurality of small water droplets, and dispersing steam to be more uniformly contacted with the heat radiating fins 35, thereby more sufficiently performing heat exchange;

when the evaporative condenser provided in this embodiment is used as an evaporator, the working principle thereof is as follows: the high-temperature fluid medium flows in through the first steam inlet 34, heat is transferred to any radiating fin 35 after circulating through the steam pipe 36, the high-temperature fluid medium is heated after the temperature of the high-temperature fluid medium is reduced and flows back to the equipment for providing high-temperature fluid through the steam outlet 37, and then the circulation is repeated, so that the radiating fin 35 always keeps higher temperature. The high-temperature fluid medium in this embodiment may be high-temperature steam, and the apparatus for providing high-temperature fluid may be an existing boiler.

The concentrated water to be evaporated is introduced into the upper diverter 33 through the water inlet 31, and is sprayed through the through holes having a diameter of 1mm-2mm after being diverted through the upper diverter 33. The sprayed concentrated water naturally falls onto the radiating fins under the action of gravity to be heated and evaporated, and the evaporated steam enters the condensing device through the exhaust port 32 to be condensed and collected into fresh water; the concentrated water which is not evaporated naturally falls to the bottom to be discharged through the water outlet 39 after passing through the evaporation and condensation unit, and the lower diverter 38 does not participate in the process; after evaporation, a large amount of fresh water is discharged in the form of water vapor, and the residual concentrated water is basically in a saturated state and even naturally crystallized, so that the aim of desalting the concentrated water is fulfilled. Of course, the saturated concentrate or partially crystallized concentrate may be subjected to a further salt extraction process to obtain a corresponding salt recovery, the subsequent processing being irrelevant to the present example and not described in detail herein.

When the evaporative condenser provided in this embodiment is used as a condenser, the working principle thereof is as follows: unlike the evaporator, the medium flowing in the steam pipe 36 is a low-temperature medium or a normal-temperature medium, such as fresh water produced by electrodialysis, so that zero-energy condensation can be achieved. High-temperature steam discharged through the evaporator enters the lower flow divider 38 through the second steam inlet 40 to enter the evaporation and condensation unit and contacts the radiating fins 35 at low temperature or normal temperature to realize heat exchange, heat release, liquefaction and condensation; in this process, the upper flow divider 33 and the exhaust port 32 do not participate in condensation. Of course, as a special application, the upper diverter 33 can also spray fresh water at low temperature or normal temperature to accelerate the effect of cold energy; the fresh water produced after condensation is finally discharged through the water outlet 39.

Thus, the entire evaporation/condensation heat exchange process is completed.

Example 2:

the application also provides a sewage electrodialysis desalination treatment system, which is shown in figures 1-2 of the specification in detail, and comprises a dialysis tank 100 for electrodialysis and an evaporation condensation mechanism 200, wherein the dialysis tank 100 comprises a fresh water chamber 13 and a concentrated water chamber 14, the fresh water chamber 13 and the concentrated water chamber 14 are respectively communicated with the evaporation condensation mechanism 200 through a fresh water branch pipe 16 and a concentrated water branch pipe 15 for heat exchange, and are respectively discharged through a first discharge port 27 and a second discharge port 28; also included is a steam generator 26, said steam generator 26 providing high temperature steam to either evaporator via a first steam inlet 34 and a steam outlet 37, said evaporative condensing mechanism 200 comprising at least one evaporative condenser 300 as described above for evaporation and condensation, respectively.

In this embodiment, the evaporative condensing mechanism 200 includes a first evaporator 22 and a first condenser, where the first evaporator 22 and the first condenser both adopt the evaporative condenser 300;

wherein, the water inlet 31 of the first evaporator 22 is communicated with the concentrated water branch pipe 15 through the flow valve 21, the air outlet 32 of the first evaporator 22 is communicated with the second steam inlet 40 of the first condenser through the first one-way valve 24, the steam generating device 26 for generating high-temperature steam is arranged between the first steam inlet 34 and the steam outlet 37 of the first evaporator 22, the water outlet 39 arranged at the bottom of the first evaporator 22 is used as the second discharge outlet 28 for discharging sewage, and the second steam inlet 40 in the first evaporator 22 is closed; the flow valve 21 is used for controlling the flow of the concentrated water, so that the phenomenon that the supplied concentrated water flow is larger than the maximum flow which can be borne by the system due to excessive concentrated water discharged after evaporation and condensation is avoided; the first check valve 24 and the second check valve 25 are used for preventing the gas from flowing backwards, and preferably a film check valve is adopted, and two films which are in contact with each other in a natural state and are obliquely arranged in the check valve; the upstream pressure is slightly higher than the downstream pressure in the direction of allowing the gas flow to pass through, and the gas can pass through, otherwise, the gas is blocked; it is worth to say that the arrangement of the check valve is only an alternative way, so that the phenomenon that the condensation efficiency is reduced due to the mutual air mixing of the steam between the multi-stage evaporators is avoided, but the final condensation effect is not affected by the arrangement of the check valve, and the condensation efficiency is slightly reduced.

The fresh water branch pipe 16 is respectively communicated with the water inlet 31 and the first steam inlet 34 of the first condenser, the steam outlet 37 and the water outlet 39 of the first condenser are mutually communicated to form a first discharge outlet 27, and the air outlet 32 of the first condenser is closed.

In the embodiment, the first-stage evaporation and the first-stage condensation are combined, after the dialysis separation is performed on the sewage through the electrodialysis tank 100, the fresh water flows from the fresh water chamber 13 to the first condenser through the fresh water branch pipe 16 for reducing the high-temperature steam in the first condenser, so that the high-temperature steam passing through the first evaporator 22 is condensed into liquid fresh water and is discharged through the water outlet 39 of the first condenser; the concentrated water generated by dialysis flows into the first evaporator 22 through the concentrated water branch pipe 15 to evaporate and generate high-temperature steam, which is input into the first condenser, and the residual concentrated water which is not evaporated and contains high concentration or saturated salt is discharged through the water outlet 39 of the first evaporator 22. The working principles of the first evaporator 22 and the first condenser in this embodiment are the same as those of the embodiment 1, and will not be described here.

In order to further improve the evaporation and condensation effect, the embodiment further provides a preferred scheme, and the application can further treat sewage which needs to be subjected to multistage evaporation and condensation treatment by connecting a plurality of evaporators/condensers for the reason that the salt concentration in the concentrated water after electrodialysis is not high enough. And as one of the preferred modes, a second evaporator 23 and a second condenser are also included, the second evaporator 23 and the second condenser are both structured by the evaporation condenser 300,

wherein the water outlet 39 of the first evaporator 22 is communicated with the water inlet 31 of the second evaporator 23, the water outlet 39 of the second evaporator 23 is communicated with the water inlet 31 of the second condenser, one end of the steam generating device 26 is communicated with the first steam inlet 34 of the first evaporator 22, the steam outlet 37 of the first evaporator 22 is communicated with the first steam inlet 34 of the second evaporator 23, the steam outlet 37 of the second evaporator 23 is communicated with the other end of the steam generating device 26, and the air outlet 32 of the second evaporator 23 is communicated with the lower flow divider 38 of the first condenser through the second one-way valve 25; the fresh water branch pipe 16 is communicated with a first steam inlet 34 of a second condenser, a steam outlet 37 of the second condenser is communicated with a water outlet 39 of the first condenser to form a first discharge outlet 27 for discharging fresh water, and the water outlet 39 of the second condenser is a second discharge outlet 28 for discharging condensed crystal concentrated water; the second vapor inlet 40 of the second evaporator 23 is closed and the second vapor inlet 40 and the exhaust port 32 of the second condenser are closed. The working principle is the same as that of the first-stage condensation and the first-stage evaporation, but the residual concentrated water after the first evaporator 22 is evaporated still continuously flows into the second evaporator 23 for secondary evaporation, and the residual concentrated water is further concentrated, so that the state of crystal precipitation or saturated concentrated water can be achieved; similarly, more fresh water can be further collected through twice condensation, so that higher desalination rate and more fresh water recovery are realized. It should be noted that, in this way, the desalination system provided in this embodiment may also implement three-stage, four-stage, or even five-stage sewage desalination. Based on the modularization combination of this system, can upgrade according to current in-service electrodialysis system and reform transform with low costs, the erection joint is convenient, swift, does not receive the place influence.

Example 3:

in order to reduce the yield of electrodialysis concentrate and increase the salt concentration in the concentrate as much as possible, in combination with the partition plate 12 shown in fig. 3, the present embodiment provides a dialysis tank 100, specifically, a plurality of partition plates 12 for dividing the tank body 11 into a plurality of fresh water chambers 13 are installed in the dialysis tank 100, the partition plates 12 include partition plates 124 as framework bodies, anion exchange membranes 122 and cation exchange membranes 125 respectively disposed at two sides of the partition plates 124, and a first pressing structure 121 and a second pressing structure 126 detachably and fixedly connected with the partition plates 124 for pressing the anion exchange membranes 122 and the cation exchange membranes 125 onto the partition plates 124, and raw water inlets 1242 for injecting raw water and concentrate outlets 1241 for discharging concentrate are also respectively disposed on the partition plates 124. In order to facilitate the replacement of the concentrate, the raw water inlet 1242 is disposed at the upper end of the bulkhead 124, and the concentrate outlet 1241 is disposed at the lower end of the bulkhead 124.

In order to reduce the occurrence of the increase of the concentrate volume caused by the mixing of the raw water into the concentrate during the concentrate replacement as much as possible, the raw water inlet 1242 and the concentrate outlet 1241 are both provided at the upper end of the bulkhead 124, and the concentrate outlet 1241 extends into the bulkhead 124 to a position close to the bottom through a pipeline. In order to avoid the anion exchange membrane 122 and the cation exchange membrane 125 from being loosened under pressure, a compression cage 123 is further arranged in the bulkhead 124.

The inner cavity of the partition plate 12 provided in this embodiment is the concentrate chamber 14, and has a smaller volume, so that high-concentration concentrate can be temporarily stored, and meanwhile, the concentrate outlet 1241 is arranged at the lower end of the partition frame 124 by arranging the raw water inlet 1242 at the upper end of the partition frame 124, so that the replacement of raw water and concentrate can be realized, and the discharge volume of concentrate can be reduced as much as possible, and the pressure of the subsequent concentrate treatment can be reduced. Compared with the existing separator of the single ion exchange membrane, the separator provided by the embodiment has the advantages of convenience and flexibility, always keeps the volume of the concentrated water chamber unchanged and independently discharges the concentrated water, and is beneficial to subsequent evaporation, condensation and desalination treatment.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An evaporative condenser, includes the shell body, and set up the evaporative condensing unit in the shell body, its characterized in that: the evaporation condensing unit comprises a plurality of radiating fins fixedly arranged in the outer shell, and a steam pipe which is arranged in any radiating fin in a reciprocating encircling and penetrating mode, wherein two ends of the steam pipe are respectively provided with a first steam inlet and a steam outlet, and any radiating fins are mutually parallel and vertically arranged;

2. Sewage electrodialysis desalination treatment system, including the dialysis tank and the evaporative condensing mechanism that are used for electrodialysis, its characterized in that: the dialysis tank comprises a fresh water chamber and a concentrated water chamber, wherein the fresh water chamber and the concentrated water chamber are respectively communicated with the evaporation and condensation mechanism through a fresh water branch pipe and a concentrated water branch pipe for heat exchange and then are respectively discharged through a first discharge port and a second discharge port; further comprising a steam generating device for providing high temperature steam to either one of the evaporators through a first steam inlet and a steam outlet, the evaporative condensing mechanism comprising at least one evaporative condenser as claimed in claim 1 for evaporating and condensing, respectively.

3. The electrodialysis desalination treatment system for treating wastewater according to claim 2, wherein: the evaporation and condensation mechanism comprises a first evaporator and a first condenser, and the evaporation and condensation mechanism is adopted by the first evaporator and the first condenser;

4. A sewage electrodialysis desalination treatment system according to claim 3, wherein: the evaporator also comprises a second evaporator and a second condenser, the second evaporator and the second condenser both adopt the evaporation condenser,

5. The electrodialysis desalination treatment system for treating wastewater according to claim 4, wherein: the dialysis tank is internally provided with a plurality of partition boards for dividing the tank body into a plurality of fresh water chambers, each partition board comprises a partition frame serving as a framework main body, an anion exchange membrane and a cation exchange membrane which are respectively arranged on two sides of the partition frame, and a first pressing structure and a second pressing structure which are detachably and fixedly connected with the partition frame and used for fixedly pressing the anion exchange membrane and the cation exchange membrane on the partition frame, wherein a raw water inlet for injecting raw water and a concentrated water outlet for discharging concentrated water are respectively arranged on the partition frame.

6. The electrodialysis desalination treatment system for treating wastewater according to claim 5, wherein: the raw water inlet is arranged at the upper end of the bulkhead, and the concentrated water outlet is arranged at the lower end of the bulkhead.

7. The electrodialysis desalination treatment system for treating wastewater according to claim 5, wherein: the raw water inlet and the concentrated water outlet are both arranged at the upper end of the bulkhead, and the concentrated water outlet extends into the bulkhead to a position close to the bottom through a pipeline.

8. The electrodialysis desalination treatment system for treating sewage according to any one of claims 5-7, wherein: and a compression-resistant cage is also arranged in the bulkhead.