A desulfurization wastewater concentration system

Abstract

The application relates to a desulfurization wastewater concentration system, belonging to the technical field of wastewater treatment, which comprises an evaporator, an evaporation circulating unit, a condenser, a condensation circulating unit and a booster fan. The evaporator is used for evaporative concentration treatment of the incoming desulfurization wastewater. The evaporation circulating unit is communicated with a concentrated liquid outlet and is used for returning the heated concentrated liquid to the evaporator. The condenser is used for condensing the steam entering from the steam inlet. The condensation circulating unit is communicated with a condensed water outlet and is used for returning the cooled condensed water to the condenser. The booster fan is connected between the evaporator and the condenser and is used for conveying the separated gas in the condenser into the evaporator. The booster fan is located below the desulfurization wastewater inlet. The application has the effects of improving the operation stability and concentration efficiency of the concentration system, effectively reducing the wastewater amount and creating favorable conditions for realizing wastewater zero discharge.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a desulfurization wastewater concentration system. Background Technology

[0002] With increasingly stringent national environmental protection requirements, achieving "zero discharge" of wastewater from thermal power plants has become an inevitable trend in the industry. Among the various types of wastewater from thermal power plants, desulfurization wastewater, due to its high salt content, strong corrosiveness, and complex water composition, is often the final stage of the entire plant's water treatment system and represents the core challenge and difficulty in achieving "zero discharge" of wastewater from the entire plant.

[0003] Currently, the concentration ratio of desulfurization wastewater treatment systems in thermal power plants is low and the treatment effect is unstable, resulting in a large volume of concentrated wastewater that cannot meet the requirements of deep water conservation and increases the difficulty of achieving "zero discharge" of wastewater. Therefore, how to develop a desulfurization wastewater concentration system that is stable in operation, has high concentration efficiency, and can effectively reduce wastewater volume is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To help improve the operational stability and concentration efficiency of the concentration system, effectively reduce wastewater volume, and create favorable conditions for achieving "zero discharge" of wastewater, this application provides a desulfurization wastewater concentration system.

[0005] The desulfurization wastewater concentration system provided in this application adopts the following technical solution: A desulfurization wastewater concentration system, comprising: An evaporator having a desulfurization wastewater inlet, a concentrate outlet, and a steam outlet, the evaporator being used to evaporate and concentrate the incoming desulfurization wastewater; An evaporation circulation unit, which is connected to the concentrate outlet, is used to heat the concentrate and then return it to the evaporator. A condenser having a steam inlet and a condensate outlet, the steam inlet being connected to the steam outlet, and the condenser being used to condense the steam entering through the steam inlet. A condensation circulation unit, which is connected to the condensate outlet, is used to cool the condensate and return it to the condenser. A booster fan is connected between the evaporator and the condenser to transport the gas separated in the condenser into the evaporator. The booster fan is located below the desulfurization wastewater inlet.

[0006] Preferably, the evaporation cycle unit includes: A concentrate tank, which is connected to a concentrate outlet; An evaporation circulation pump, which is connected to a concentrate tank; The first heat exchanger has its input end connected to the evaporation circulation pump and its output end connected to the evaporator.

[0007] Preferably, the evaporator is equipped with an atomizing evaporation device, and the output end of the first heat exchanger is connected to the atomizing evaporation device in the evaporator. The atomizing evaporation device is used to atomize and spray out the hot concentrated liquid.

[0008] Preferably, the connection between the evaporator and the booster fan is located below the atomizing evaporation device.

[0009] Preferably, the evaporator is equipped with a spray device and a demisting device. The spray device is connected to the desulfurization wastewater inlet of the evaporator and is used to spray desulfurization wastewater into the evaporator. The spray device is located above the atomizing evaporator, and the demisting device is located above the atomizing evaporator.

[0010] Preferably, the condensation cycle unit includes: A condensate tank, wherein the condensate tank is connected to a condensate outlet; A condensate circulation pump, which is connected to a condensate tank; The second heat exchanger has its input end connected to the condensate circulation pump and its output end connected to the condenser.

[0011] Preferably, the condenser is provided with an atomizing condensation device, and the output end of the second heat exchanger is connected to the atomizing condensation device in the condenser. The atomizing condensation device is used to atomize and spray the cooled condensate.

[0012] Preferably, the connection between the condenser and the booster fan is located below the atomizing condensation device.

[0013] Preferably, the evaporator is provided with a gas equalization plate, which is located between the connection position of the atomizing evaporation device and the booster fan on the evaporator. The gas equalization plate has multiple gas equalization holes, and a spiral blade is provided above the gas equalization plate. The spiral blade corresponds one-to-one with the gas equalization hole, and the spiral blade is concentrically arranged with the corresponding gas equalization hole. The length of the spiral blade is less than half of the distance between the gas equalization plate and the atomizing evaporation device.

[0014] Preferably, a flexible cable is movably disposed inside the spiral blade, the flexible cable passing through the corresponding spiral blade and the interior of the air distribution hole in sequence, and a counterweight is disposed at the lower end of the flexible cable, the counterweight being located between the air distribution plate and the booster fan on the evaporator.

[0015] In summary, this application includes the following beneficial technical effects: During operation, desulfurization wastewater enters the evaporator through the desulfurization wastewater inlet. The liquid at the bottom of the evaporator enters the evaporation circulation unit through the concentrate outlet. The evaporation circulation unit heats the wastewater, which then returns to the evaporator to evaporate and produce water vapor. The water vapor enters the condenser for condensation. The condensate in the condenser enters the condensate circulation unit through the condensate outlet. The condensate circulation unit cools the condensate before returning it to the condenser, thus achieving condensation circulation. A booster fan transports the gas separated in the condenser to the evaporator. The carrier gas entering the evaporator effectively carries away the water vapor evaporated from the desulfurization wastewater. Driven by the circulation of the carrier gas, the evaporation and condensation processes are carried out efficiently. The concentration system of this application uses a closed-loop carrier gas circulation and operates at a low temperature, which reduces the probability of scaling and crystallization, makes the system operation more stable, improves concentration efficiency, helps reduce wastewater volume, and creates favorable conditions for achieving "zero discharge" of wastewater. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application, wherein the arrows in the diagram represent the direction of medium flow.

[0017] Figure 2 This is a schematic diagram of the overall structure of the evaporator in Embodiment 2 of this application, wherein the arrows in the diagram represent the direction of medium flow.

[0018] Figure 3 This is a partial structural schematic diagram of Embodiment 2 of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Evaporator; 11. Desulfurization wastewater inlet; 12. Concentrate outlet; 13. Steam outlet; 2. Evaporation circulation unit; 21. Concentrate tank; 22. Evaporation circulation pump; 23. First heat exchanger; 3. Condenser; 31. Steam inlet; 32. Condensate outlet; 4. Condensation circulation unit; 41. Condensate tank; 42. Condensate circulation pump; 43. Second heat exchanger; 5. Booster fan; 6. Atomizing evaporator; 7. Spraying device; 71. Spraying mechanism; 8. Demisting device; 9. Atomizing condensation device; 10. Gas distribution plate; 101. Gas distribution hole; 14. Spiral blade; 15. Flexible cable; 16. Counterweight; 17. Support plate; 18. Connecting pipe; 19. Start-up condensate input pipe. Detailed Implementation

[0020] The following combination Figures 1-3 This application will be described in further detail.

[0021] Example 1:

[0022] This application discloses a desulfurization wastewater concentration system. (Refer to...) Figure 1The desulfurization wastewater concentration system includes an evaporator 1, an evaporation circulation unit 2, a condenser 3, a condensation circulation unit 4, and a booster fan 5. Both the evaporator 1 and the condenser 3 are tank-shaped. The evaporator 1 is used to evaporate and concentrate the desulfurization wastewater. Furthermore, the evaporator 1 has a desulfurization wastewater inlet 11, a concentrate outlet 12, and a steam outlet 13. The desulfurization wastewater inlet 11 is located at the upper end of the evaporator 1 tank, providing a channel for the input of desulfurization wastewater. The concentrate outlet 12 is located at the bottom end of the evaporator 1 tank, providing a channel for the discharge of the concentrated liquid after evaporation of the desulfurization wastewater. The steam outlet 13 is located at the top of the evaporator 1 tank, above the desulfurization wastewater inlet 11, thus providing a channel for the discharge of water vapor from the evaporated desulfurization wastewater. The evaporation circulation unit 2 is connected to the concentrate outlet 12. The evaporation circulation unit 2 is used to heat the wastewater concentrate and then return it to the evaporator 1, realizing the cyclic evaporation of the desulfurization wastewater, thereby effectively reducing the final wastewater volume.

[0023] Reference Figure 1 The condenser 3 has a steam inlet 31 and a condensate outlet 32. The steam inlet 31 is located at the top of the condenser 3 and is used to communicate with the steam outlet 13 on the evaporator 1. Specifically, the steam inlet 31 and the steam outlet 13 are connected by a connecting pipe 18. The condensate outlet 32 ​​is located at the bottom of the condenser 3 and is used to discharge condensate. Specifically, the condenser 3 is used to condense the steam entering through the steam inlet 31 to form recyclable condensate. The condensation circulation unit 4 is connected to the condensate outlet 32 ​​and is used to cool the condensate and return it to the condenser 3, which helps to improve condensation efficiency.

[0024] Reference Figure 1 The booster fan 5 is connected between the evaporator 1 and the condenser 3 to send the gas separated in the condenser 3 into the evaporator 1. The connection position between the booster fan 5 and the evaporator 1 is located below the desulfurization wastewater inlet 11.

[0025] During operation, external desulfurization wastewater continuously enters the evaporator 1 through the desulfurization wastewater inlet 11. The liquid at the bottom of the evaporator 1 enters the evaporation circulation unit 2 through the concentrate outlet 12. The wastewater is heated by the evaporation circulation unit 2 and then returned to the evaporator 1. The desulfurization wastewater entering through the desulfurization wastewater inlet 11 evaporates upon contact with the heated desulfurization wastewater, generating water vapor. The water vapor enters the condenser 3 through the connecting pipe 18 for condensation, separating the water and gas. The condensate in the condenser 3 is then condensed... Water outlet 32 ​​enters the condensation circulation unit 4, where the condensate is cooled before returning to the condenser 3. This condensation process condenses the water vapor entering the condenser 3, achieving a condensation cycle. A booster fan 5 transports the carrier gas separated from the condenser 3 to the evaporator 1. The carrier gas entering the evaporator 1, flowing from bottom to top, effectively carries away the water vapor evaporated from the desulfurization wastewater, reducing the probability of scaling and crystallization. Furthermore, the circulating flow of the carrier gas promotes efficient evaporation and condensation processes. The concentration system of this application, through closed-loop carrier gas circulation, offers more stable system operation, improved concentration efficiency, and helps reduce wastewater volume, creating favorable conditions for achieving "zero discharge" of wastewater.

[0026] Reference Figure 1 To further improve evaporation efficiency, a spray device 7 and a demisting device 8 are fixedly installed inside the evaporator 1. The spray device 7 is located at the upper end of the evaporator 1 tank and is connected to the desulfurization wastewater inlet 11 of the evaporator 1. It is used to spray desulfurization wastewater into the evaporator 1. Specifically, the spray device 7 includes two sets of spray mechanisms 71. The spray mechanism 71 can be a nozzle-type spray mechanism 71, with nozzles evenly distributed inside the evaporator 1 to evenly spray the desulfurization wastewater; or it can be a water curtain-type spray mechanism 71, forming a water curtain-like wastewater layer. The specific design is not limited. The spray device 7 helps to increase the contact area between the desulfurization wastewater and the heated concentrate, and between the desulfurization wastewater and the carrier gas, promoting evaporation and achieving a certain degree of demisting effect.

[0027] Reference Figure 1 The demister 8 is located between the two spray mechanisms 71 and is used to remove mist droplets from the steam, preventing the droplets from being carried out of the evaporator 1 with the steam and ensuring the purity of the steam. Specifically, the demister 8 can be a wire mesh demister, which intercepts the mist droplets through the wire mesh; or it can be a baffle plate demister, which uses the inertial collision of the mist droplets to capture them on the baffle plate. There is no limitation on this.

[0028] Reference Figure 1To achieve the circulating evaporation of desulfurization wastewater, the evaporation circulation unit 2 includes a concentrate tank 21, an evaporation circulation pump 22, and a first heat exchanger 23. The concentrate tank 21 is connected to the concentrate outlet 12 and is used to store the concentrate. The evaporation circulation pump 22 is connected to the concentrate tank 21. Specifically, the evaporation circulation pump 22 can be a centrifugal pump, which uses centrifugal force to transport the liquid; or it can be a screw pump, which uses the rotation of the screw to drive the liquid flow. There is no limitation here.

[0029] Reference Figure 1 The input end of the first heat exchanger 23 is connected to the evaporation circulation pump 22, and the output end is connected to the evaporator 1. Specifically, the first heat exchanger 23 is an indirect heat exchanger, so only heat is transferred and no matter is exchanged, which makes the pH value of the desulfurization wastewater stable during the concentration process, reduces corrosion, and effectively improves the stability of system operation. Specifically, the first heat exchanger 23 can be a plate heat exchanger, which achieves heating through heat exchange between plates; or it can be a tubular heat exchanger, which uses heat exchange within the pipes to heat the concentrate.

[0030] During operation, the concentrate enters the concentrate tank 21 from the concentrate outlet 12 of the evaporator 1, and is then transported to the first heat exchanger 23 by the evaporation circulation pump 22. At the first heat exchanger 23, the concentrate exchanges heat with the external heat medium, thereby heating the concentrate. The heated concentrate then re-enters the evaporator 1, realizing the circulation heating and evaporation of the concentrate, which helps to reduce the amount of wastewater and creates favorable conditions for achieving "zero discharge" of wastewater.

[0031] Reference Figure 1 To further improve evaporation efficiency, an atomizing evaporation device 6 is installed inside the evaporator 1. The output end of the first heat exchanger 23 is connected to the atomizing evaporation device 6 inside the evaporator 1. The atomizing evaporation device 6 is used to atomize and spray the hot concentrated liquid. Specifically, the atomizing evaporation device 6 is located below the spray device 7 and the demisting device 8. The connection point of the booster fan 5 to the evaporator 1 is located below the atomizing evaporation device 6 to improve the effect of the carrier gas in carrying away water vapor. In this embodiment, the atomizing device is a pressure atomizer, which atomizes the concentrated liquid into small droplets through high pressure; in other embodiments, a rotary atomizer can also be used, which uses high-speed rotation to throw the concentrated liquid out to form droplets.

[0032] By setting up the atomizing evaporation device 6, the heated concentrate is atomized into droplets and densely distributed inside the evaporator 1, which helps to make more sufficient contact between the desulfurization wastewater and the hot concentrate, and between the hot concentrate and the carrier gas, thus accelerating the evaporation rate.

[0033] Reference Figure 1To facilitate the circulation of condensate, the condensate circulation unit 4 includes a condensate tank 41, a condensate circulation pump 42, and a second heat exchanger 43. The condensate tank 41 is connected to the condensate outlet 32 ​​via a pipe and is used to store condensate. Furthermore, in order to enable the condensation of water vapor in the condenser 3 during startup, the condensate tank 41 is equipped with a startup condensate inlet pipe 19 to facilitate the input of startup condensate.

[0034] Reference Figure 1 The condensate circulation pump 42 is connected to the condensate tank 41. Specifically, the condensate circulation pump 42 can be a centrifugal pump or a screw pump, and there is no restriction here.

[0035] Reference Figure 1 The inlet of the second heat exchanger 43 is connected to the condensate circulation pump 42, and the outlet is connected to the condenser 3. Furthermore, the second heat exchanger 43 also adopts an indirect heat exchanger, specifically a plate heat exchanger, a tube heat exchanger, or the like.

[0036] During operation, condensate enters the condensate tank 41 from the condensate outlet 32 ​​of the condenser 3, and is then transported to the second heat exchanger 43 by the condensate circulation pump 42. At the second heat exchanger 43, the condensate exchanges heat with the external refrigerant, thereby cooling the condensate. The cooled condensate then re-enters the condenser 3, thus achieving condensate circulation.

[0037] Reference Figure 1 The condenser 3 is equipped with an atomizing condensation device 9, which is an atomizer or an atomizing nozzle assembly. The output end of the second heat exchanger 43 is connected to the atomizing condensation device 9 in the condenser 3. The connection position of the booster fan 5 and the condenser 3 is located below the atomizing condensation device 9. The atomizing condensation device 9 is used to atomize and spray out the cooled condensate.

[0038] During operation, the atomizing condensation device 9 atomizes the cooled condensate into droplets that are densely distributed inside the condenser 3. The water vapor entering the condenser 3 collides with the low-temperature droplets that are densely distributed inside the condenser 3, thereby condensing into water, achieving separation of condensate and carrier gas. Then, the condensate flows into the condensate tank 41, and the carrier gas enters the evaporator 1 through the booster fan 5.

[0039] Reference Figure 1 The booster fan 5 can be a centrifugal fan, which generates air pressure through centrifugal force; it can also be an axial flow fan, which uses the rotation of blades to drive the gas flow; or it can be a Roots blower, which compresses and transports gas by two three-lobe rotors moving relative to each other in a cylinder. There are no restrictions on this.

[0040] Reference Figure 1To facilitate the discharge of the concentrated slurry from the system, a concentration sensor is installed inside the concentrated slurry tank 21. The concentration sensor detects the concentration of the concentrated slurry in the concentrated slurry tank 21. When the detected concentration value is greater than a preset value, the concentrated slurry in the concentrated slurry tank 21 is output to an external pipeline equipped with a valve via the evaporation circulation pump 22 for further processing. To prevent the condensate tank 41 from becoming full, a pipeline with a valve is connected between the condensate circulation pump 42 and the second heat exchanger 43 to facilitate the discharge of excess condensate.

[0041] The implementation principle of Embodiment 1 of this application is as follows: During operation, desulfurization wastewater continuously enters the evaporator 1 through the spray device 7. The wastewater at the bottom of the evaporator 1 enters the concentrate tank 21 through the concentrate outlet 12, and is then transported to the first heat exchanger 23 by the evaporation circulation pump 22. At the first heat exchanger 23, the wastewater exchanges heat with the external heat medium, thereby heating the wastewater. The heated wastewater is atomized into droplets by the atomizing evaporation device 6 and densely distributed inside the evaporator 1. The desulfurization wastewater sprayed by the spray device 7 evaporates in contact with the high-temperature droplets, generating water vapor. After the water vapor passes through the demisting at the top of the evaporator 1, it enters the condenser 3 through the connecting pipe 18. In the initial startup state, the startup condensate enters the condensate tank 41 through the startup condensate inlet pipe 19, and is then transported to the second heat exchanger 43 by the condensate circulation pump 42 for cooling. The cooled condensate is atomized into droplets by the atomizing condensation device 9 and densely distributed in the condenser 3. The water vapor entering the condenser 3 collides with the low-temperature droplets, thereby condensing into water, separating the condensate from the carrier gas. The condensate flows into the condensate tank 41 for circulation, while the carrier gas is transported to the evaporator 1 by the booster fan 5. The carrier gas entering the evaporator 1 flows from bottom to top, effectively carrying away the evaporated water vapor and promoting the efficient operation of both evaporation and condensation processes. When the condensate in the condensate tank 41 reaches the circulation volume, the startup condensate inlet pipe 19 is closed.

[0042] The concentration system of this application operates under normal pressure. It uses a heat transfer medium to heat the concentrate and a cooling medium to cool the condensate, thereby achieving the purpose of concentrating desulfurization wastewater. The system is simple to configure and easy to operate. Furthermore, through a closed-loop carrier gas circulation, the system operates more stably, the concentration efficiency is improved, and it helps to reduce the amount of wastewater, creating favorable conditions for achieving "zero discharge" of wastewater.

[0043] Example 2:

[0044] Reference Figure 2 and Figure 3The difference between this embodiment and Embodiment 1 is that a gas equalization plate 10 is fixedly installed inside the evaporator 1. The gas equalization plate 10 is a planar plate structure and is located between the connection position of the atomizing evaporation device 6 and the booster fan 5 on the evaporator 1. Specifically, the gas equalization plate 10 is close to the connection position of the booster fan 5 on the evaporator 1, and a plurality of gas equalization holes 101 are evenly opened on the gas equalization plate 10. By setting the gas equalization plate 10, the carrier gas entering the evaporator 1 can rise evenly through the plurality of gas equalization holes 101, which helps to improve the uniformity of contact between the carrier gas and the droplets.

[0045] Reference Figure 2 and Figure 3 Furthermore, a spiral blade 14 is fixedly installed above the gas equalization plate 10. The spiral blade 14 corresponds one-to-one with the gas equalization hole 101, and the spiral blade 14 and the corresponding gas equalization hole 101 are concentrically arranged. The length of the spiral blade 14 is less than half the distance between the gas equalization plate 10 and the atomizing evaporation device 6. The carrier gas passing through the gas equalization hole 101 will flow spirally along the corresponding spiral blade 14, thereby effectively prolonging the contact time and contact path between the carrier gas and the droplets, and enhancing the mixing effect between the carrier gas and the droplets. Since most of the water has evaporated when the wastewater evaporates to the middle and lower part, what remains is basically high-concentration brine droplets or unevaporated wastewater. By placing the spiral blade 14 in the middle and lower part of the entire evaporator 1 tank, it will not affect the atomization state of the droplets at the upper end of the evaporator 1.

[0046] Reference Figure 2 and Figure 3 Furthermore, a support plate 17 is fixedly installed at the top of the spiral blade 14, and a flexible cable 15 is installed on the support plate 17. The flexible cable 15 moves sequentially through the middle of the corresponding spiral blade 14 and the air distribution hole 101. A counterweight 16 is fixed to the lower end of the flexible cable 15, and the counterweight 16 is located between the air distribution plate 10 and the booster fan 5 on the evaporator 1. The air distribution plate 10, spiral blade 14, flexible cable 15, and counterweight 16 are all made of corrosion-resistant materials or have a corrosion-resistant coating. During operation, the upward dynamic pressure of the carrier gas is insufficient to lift the counterweight 16 into the air distribution hole 101.

[0047] The implementation principle of Embodiment 2 of this application is as follows: During operation, after the carrier gas enters the evaporator 1, it first passes through the gas distribution holes 101 on the gas distribution plate 10 to achieve uniform distribution, and then forms a spiral airflow along the corresponding spiral blades 14, thereby extending the contact time and contact path between the carrier gas and the mist droplets and improving the evaporation efficiency.

[0048] Meanwhile, as the carrier gas enters the evaporator 1 and flows upward, it blows the counterweight 16, causing it to swing irregularly. This causes the flexible cable 15 to vibrate at high frequency within the spiral blades 14 and the air distribution holes 101. This not only effectively prevents droplets from crystallizing and clogging at the spiral blades 14 and the air distribution holes 101, but also causes the droplets accumulated on the flexible cable 15 and the spiral blades 14 to splash and tear, facilitating full contact between the spiral airflow and the droplets and improving the evaporation effect.

[0049] To further prevent the gas distribution plate 10 from clogging, the hardness of the desulfurization wastewater entering the evaporator 1 can be reduced, and the interior of the evaporator 1 can be cleaned regularly.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A desulfurization wastewater concentration system, characterized in that, include: Evaporator (1), which has a desulfurization wastewater inlet (11), a concentrate outlet (12) and a steam outlet (13), is used to evaporate and concentrate the incoming desulfurization wastewater; Evaporation circulation unit (2), which is connected to the concentrate outlet (12), is used to heat the concentrate and then return it to the evaporator (1); A condenser (3) having a steam inlet (31) and a condensate outlet (32), the steam inlet (31) being connected to the steam outlet (13), and the condenser (3) being used to condense the steam entering through the steam inlet (31); Condensation circulation unit (4), which is connected to condensate outlet (32), is used to cool the condensate and return it to the condenser (3); A booster fan (5) is connected between the evaporator (1) and the condenser (3) to transport the gas separated in the condenser (3) into the evaporator (1). The booster fan (5) is located below the desulfurization wastewater inlet (11). The evaporator (1) is equipped with an atomizing evaporation device (6) for atomizing and spraying the hot concentrated liquid. The evaporator (1) is also equipped with a gas equalization plate (10), located between the atomizing evaporation device (6) and the booster fan (5) on the evaporator (1). The gas equalization plate (10) has multiple gas equalization holes (101). A spiral blade (14) is positioned above the gas equalization plate (10), with each spiral blade (14) corresponding to one of the gas equalization holes (101). The spiral blade (14) is concentrically arranged with the corresponding air distribution hole (101). The length of the spiral blade (14) is less than half the distance between the air distribution plate (10) and the atomizing evaporation device (6). A flexible cable (15) is movably arranged inside the spiral blade (14). The flexible cable (15) passes through the interior of the corresponding spiral blade (14) and the air distribution hole (101) in sequence. A counterweight (16) is provided at the lower end of the flexible cable (15). The counterweight (16) is located between the air distribution plate (10) and the connection position of the booster fan (5) on the evaporator (1).

2. The desulfurization wastewater concentration system according to claim 1, characterized in that, The evaporation cycle unit (2) includes: A concentrate tank (21) is connected to a concentrate outlet (12); An evaporation circulation pump (22) is connected to a concentrate tank (21); The first heat exchanger (23) has its input end connected to the evaporation circulation pump (22) and its output end connected to the evaporator (1).

3. The desulfurization wastewater concentration system according to claim 2, characterized in that, The output end of the first heat exchanger (23) is connected to the atomizing evaporation device (6) inside the evaporator (1).

4. The desulfurization wastewater concentration system according to claim 3, characterized in that, The connection between the evaporator (1) and the booster fan (5) is located below the atomizing evaporation device (6).

5. A desulfurization wastewater concentration system according to claim 3, characterized in that, The evaporator (1) is equipped with a spray device (7) and a demisting device (8). The spray device (7) is connected to the desulfurization wastewater inlet (11) of the evaporator (1) and is used to spray desulfurization wastewater into the evaporator (1). The spray device (7) is located above the atomizing evaporator (6) and the demisting device (8) is located above the atomizing evaporator (6).

6. A desulfurization wastewater concentration system according to any one of claims 1-5, characterized in that, The condensation cycle unit (4) includes: Condensate tank (41), the condensate tank (41) is connected to condensate outlet (32); A condensate circulation pump (42) is connected to a condensate tank (41); The second heat exchanger (43) has its input end connected to the condensate circulation pump (42) and its output end connected to the condenser (3).

7. A desulfurization wastewater concentration system according to claim 6, characterized in that, The condenser (3) is provided with an atomizing condensation device (9), and the output end of the second heat exchanger (43) is connected to the atomizing condensation device (9) in the condenser (3). The atomizing condensation device (9) is used to atomize and spray out the cooled condensate.

8. A desulfurization wastewater concentration system according to claim 7, characterized in that, The connection between the condenser (3) and the booster fan (5) is located below the atomizing condensation device (9).

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