System and method for deep coupling zero-emission deep treatment and recycling of high and low salt water in coal-fired power plant

Abstract

The invention provides a coal-fired power plant high-low salt water deep coupling zero-emission deep treatment recycling method which comprises the following steps: step 1, feeding backwashing water of a fine treatment iron and manganese removal filter into an industrial wastewater storage pool A, and feeding mixed bed regeneration wastewater low salt water into an industrial wastewater storage pool B, feeding the mixed bed regeneration wastewater high-salinity water into an industrial wastewater storage pool C for storage; different-quality recovery is realized according to the water quality condition; step 2, feeding into an industrial wastewater treatment system for treatment, and step 3, treating the backwashing water of the fine treatment iron and manganese removal filter and the low-salt water of the mixed bed regeneration wastewater by the industrial wastewater treatment system to obtain low-salt water, feeding the low-salt water into the iron and manganese removal filter by utilizing a lifting pump after passing through a clean water tank to secondarily remove iron and manganese which influence the operation of a desulfurization system, feeding into a desulfurization system for replenishing water; and 4, the mixed bed regeneration wastewater high-salinity water obtained after industrial wastewater treatment is fed into a hot-process zero-emission system through a lifting pump, and treatment of the high-salinity water and recycling of water resources are achieved.

Description

Technical Field

[0001] The present invention relates to the field of high and low brine reuse in coal-fired power plants, and in particular to a system and method for deep coupling zero-emission deep treatment and reuse of high and low brine in coal-fired power plants. Background Art

[0002] Mixed bed regeneration wastewater is generally treated before being discharged in compliance with discharge standards, or used as make-up water for desulfurization after treatment. However, this also causes discoloration of the desulfurization by-product gypsum. Moreover, the entry of high-salt water increases the ion content of the desulfurization system, leading to incomplete sulfur oxidation, affecting desulfurization efficiency, and a sharp increase in desulfurization wastewater.

[0003] Reverse osmosis can be used to replace zero discharge for deep treatment of mixed bed regeneration wastewater, but it needs to be set up separately. Generally, the mixed bed regeneration cycle is 45 days, which will cause long-term shutdown of reverse osmosis and make reverse osmosis maintenance difficult.

[0004] In non-zero emission coal-fired power plants, the three types of water, namely, backwash water from the fine treatment iron and manganese removal filter, high-salt water from the mixed bed regeneration wastewater, and low-salt water, are mixed and treated using conventional industrial wastewater treatment methods. They are then discharged after meeting the standards, which can basically achieve normal treatment. However, there are certain environmental risks and a large amount of low-salt water resources are wasted (each time the mixed bed is regenerated, a large amount of desalted water is required for flushing).

[0005] In zero-emission coal-fired power plants, the three types of water, namely, fine treatment iron and manganese removal backwash water, mixed bed regeneration wastewater, high brine and low brine, are mixed and treated with conventional industrial wastewater, all of which are used as make-up water for desulfurization. However, the fine treatment iron and manganese removal backwash water and the fine treatment mixed bed regeneration high and low brine contain a large amount of iron and manganese ions, which cause the desulfurization slurry to change color, which affects the desulfurization efficiency in small amounts and the byproduct gypsum to change color, affecting the sales of gypsum. At the same time, the high brine enters the desulfurization system directly without any treatment, resulting in a significant increase in the ion content of the desulfurization slurry, resulting in insufficient dissolution of calcium and sulfur dioxide, and poor absorption of sulfur dioxide by the desulfurization system, affecting the desulfurization efficiency. In addition, since the oxidation of iron and manganese ions also requires oxygen, sulfur oxidation is incomplete, affecting the quality of gypsum. Due to the entry of a large number of ions, the desulfurization system needs to increase the discharge of wastewater, and the desulfurization wastewater increases dramatically. Summary of the invention

[0006] In order to solve the above problems, the present invention discloses a system and method for deep coupling zero-emission deep treatment and reuse of high and low brine in coal-fired power plants. The conventional industrial wastewater treatment system is improved by finely treating the iron and manganese removal backwash water, the high brine of mixed bed regeneration wastewater, and the low brine of mixed bed regeneration wastewater. The backwash water and the low brine are filtered through the iron and manganese removal filter and directly reused to the desulfurization system. The high brine of mixed bed regeneration wastewater is discharged into the built desulfurization wastewater treatment facility, thereby achieving reuse.

[0007] A method for deep treatment and reuse of high and low brine in a coal-fired power plant with zero discharge coupled deep treatment comprises the following steps:

[0008] Step 1: Reconstruct the drainage pipelines of the backwash water of the fine iron and manganese removal filter, the low-salt water of the mixed bed regeneration wastewater, and the high-salt water of the mixed bed regeneration wastewater, and send the backwash water of the fine iron and manganese removal filter to the industrial wastewater storage tank A, the low-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank B, and the high-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank C for storage; and according to the water quality conditions, the industrial wastewater storage tank body and equipment must be subjected to corresponding anti-corrosion to achieve quality-based recovery; after the mixed bed regeneration is completed, drain the water first, then fill it with water, and then drain it again. This part of the water is discharged to the high-salt water industrial wastewater storage tank to minimize the amount of high-salt water.

[0009] A method for reducing the salt content of low-salt water. After the mixed bed is regenerated, the mixed bed is first filled with water, and this part of the water is discharged to the high-salt industrial wastewater storage tank. Instead of directly flushing with a large amount of water after regeneration. That is, a part of the water is sacrificed, and it is fully mixed with the inside of the mixed bed and discharged as high-salt water. After that, it is flushed with a large amount of water. At this time, the salt content of the low-salt water produced is significantly reduced, and its pH is close to neutral, which can reduce the subsequent acid and alkali consumption of the low-salt water in the mixed bed regeneration. Saving reagents is a small matter. What is more important is to reduce the salt ions of this part of water and improve the reuse value of this part of water.

[0010] Step 2: The water in industrial wastewater storage tank A, industrial wastewater storage tank B, and industrial wastewater storage tank C is sent to the industrial wastewater treatment system through the outlet pipe for treatment.

[0011] Step 3: The water treated by the industrial wastewater treatment system from the backwash water of the fine treatment iron and manganese removal filter and the low-salt water of the mixed bed regeneration wastewater is collectively referred to as low-salt water. After passing through the clean water tank, it is pumped into the iron and manganese removal filter to remove the iron and manganese that affect the operation of the desulfurization system for a second time, and then sent to the desulfurization system for water replenishment;

[0012] Step 4: The high-salt water of mixed bed regeneration wastewater is sent into the thermal zero-emission system through a lifting pump after industrial wastewater treatment to achieve the treatment of high-salt water and the reuse of water resources.

[0013] Furthermore, the process flow of the industrial wastewater treatment system is as follows: the outlet pipe is connected to the PH adjustment tank through a water pump; the PH adjustment tank is used to adjust the acid-base balance; the PH adjustment tank is connected to the reaction tank, and the outlet pipe of the reaction tank is connected to the flocculation tank; the flocculation tank is connected to the clarifier, and the liquid outlet of the clarifier is connected to the final neutralization tank and the clean water tank; the final neutralization tank and the clean water tank adopt a rotary overflow design; the volume ratio of the clean water tank and the final neutralization tank is 4:1, and the final neutralization tank is regularly cleaned with a submersible lift pump.

[0014] Furthermore, according to the characteristics of the three types of water quality, an automatic valve is set at the outlet of each industrial wastewater storage tank, and different dosing methods and residence times are adopted; the residence time adopts the method of lifting pump 1 adjusting its manual valve or lifting pump 1 frequency conversion to change the treated water flow rate.

[0015] The pH of mixed bed regeneration low brine is neutral, and only a small amount of acid or alkali needs to be added to reach pH 6-9. Sometimes, no acid or alkali needs to be added, and the pH is between 6-9. The mixed bed regeneration low brine has the largest water volume. After each regeneration, a large amount of water is required for flushing, so the flow rate is large each time. Although the treatment flow rate is large, the water quality in the clean water pool is also the best.

[0016] The mixed bed regeneration high-salt water is the mixed bed regeneration acid wastewater and alkaline wastewater (two wastewaters, one acidic and one alkaline). The industrial wastewater storage tank C is used to allow it to achieve maximum acid-base self-balance. During operation, self-balance cannot be achieved generally, which is mainly caused by the metering deviation of the mixed bed regeneration acid and alkali and the on-site operation error. A certain amount of acid and alkali must be added to adjust the pH, but the water volume is not large. It is the source of the high-salt water behind the lifting pump 2 and has no reuse value. Thermal zero-emission treatment is carried out.

[0017] The backwash water for fine treatment of iron and manganese removal contains a large amount of suspended matter and a certain amount of iron and manganese ions. It must be aerated and oxidized in the industrial wastewater storage tank A to oxidize the iron and manganese ions and convert them into suspended matter. In the subsequent treatment, certain flocculants and coagulants are added, and the treatment flow rate is reduced to allow them to fully precipitate. Its general PH is neutral, and only the PH needs to be tested. If it exceeds, a small amount of acid and alkali is added. If the precipitation of iron and manganese ions is incomplete, the gypsum in the desulfurization system will turn red, affecting the sales of gypsum and also affecting the desulfurization efficiency of a small amount.

[0018] Furthermore, a conductivity meter is installed behind the lifting pump of the clean water pool, and the salt content in the water is determined by the conductivity meter. When it is higher than the set value, it is judged as high-salt water and is treated by a zero-discharge system. Otherwise, it is filtered through an iron and manganese removal filter and then reused.

[0019] Furthermore, the conductivity value is generally set at around 20ms / cm to reduce the fresh water ratio in the drying system, reduce heat consumption and save energy.

[0020] Furthermore, the final neutralization tank is cleaned regularly using a submersible lift pump.

[0021] Furthermore, since the backwashing cycle of the fine treatment iron and manganese removal filter and the mixed bed regeneration are relatively long, the industrial wastewater treatment equipment needs to be emptied each time the water quality filter backwashing and the mixed bed regeneration water are switched; the PH adjustment tank, reaction tank, flocculation tank, clarifier, clean water tank, and final neutralization tank are emptied. The emptying method: The PH adjustment tank, reaction tank, flocculation tank, and clarifier are all equipped with bottom drain valves, and the bottom sediment is first discharged to the pit sludge pool. The sludge pool will be transported to the sludge treatment room for centralized dehydration, and the upper clean water will be discharged back to the original industrial wastewater storage tank.

[0022] A high- and low-brine deep coupling zero-emission deep treatment and reuse system for a coal-fired power plant comprises an industrial wastewater storage tank A, an industrial wastewater storage tank B and an industrial wastewater storage tank C; wherein the water outlets of the industrial wastewater storage tank A, the industrial wastewater storage tank B and the industrial wastewater storage tank C are all connected to a main water outlet pipe through automatic valves, and the main water outlet pipe is connected to a pH adjustment tank, a reaction tank, a flocculation tank, a clarifier, a clean water tank and a final neutralization tank in sequence through a lift pump 1; the outlet of the clean water tank is connected to a lift pump 2; the discharge port of the lift pump 2 is provided with a low-brine water outlet pipe and a high-brine water outlet pipe, wherein the low-brine water outlet pipe is connected to an iron and manganese removal filter; and the high-brine water outlet pipe is connected to a thermal zero-emission system.

[0023] Among them, industrial wastewater storage tank A, industrial wastewater storage tank B and industrial wastewater storage tank C are used to store the backwash water of the iron and manganese removal filter that needs to be finely treated, the low-salt water of the mixed bed regeneration wastewater and the high-salt water of the mixed bed regeneration wastewater respectively.

[0024] The final neutralization tank and clean water tank adopt a rotary overflow design.

[0025] Beneficial effects of the present invention:

[0026] 1. The refined treatment of backwash water for iron and manganese removal, high-salt mixed bed regeneration wastewater, and low-salt mixed bed regeneration wastewater were achieved, and water resources were recycled.

[0027] 2. Solved a series of problems caused by the fine treatment of iron and manganese removal backwash water and fine treatment mixed bed regeneration water reused in the desulfurization system, iron and manganese, etc.

[0028] 3. Coupled with the zero emission system of coal-fired power plants, the high-salt water in the mixed bed regeneration wastewater is treated and reused to avoid the adverse effects of high-salt water on the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 , process flow chart of the present invention.

[0030] List of reference numerals:

[0031] 1-fine treatment of iron and manganese removal backwash water; 2-mixed bed regeneration low brine; 3-mixed bed regeneration high brine; 4-industrial wastewater storage tank A; 5-industrial wastewater storage tank B; 6-industrial wastewater storage tank C; 7-atmosphere; 8-Roots blower; 9-PH adjustment tank; 10-reaction tank; 11-flocculation tank; 12-clarifier; 13-final neutralization tank; 14-clean water tank; 15-low brine; 16-low brine; 17-iron and manganese removal filter; 18-recycling to desulfurization system replenishment; 19-thermal zero emission. DETAILED DESCRIPTION

[0032] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] like Figure 1 As shown, Figure 1 The parts list is as follows:

[0034]

[0035]

[0036] A method for deep coupling zero-emission deep treatment and reuse of high and low brine in a coal-fired power plant according to this embodiment includes the following steps:

[0037] Step 1: Reconstruct the drainage pipelines of the backwash water of the fine iron and manganese removal filter, the low-salt water of the mixed bed regeneration wastewater, and the high-salt water of the mixed bed regeneration wastewater, and send the backwash water of the fine iron and manganese removal filter to the industrial wastewater storage tank A, the low-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank B, and the high-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank C for storage; and according to the water quality conditions, the industrial wastewater storage tank body and equipment must be subjected to corresponding anti-corrosion to achieve quality-based recovery; after the mixed bed regeneration is completed, drain the water first, then fill it with water, and then drain it again. This part of the water is discharged to the high-salt water industrial wastewater storage tank to minimize the amount of high-salt water.

[0038] Since the backwashing cycle of the fine treatment iron and manganese removal filter and the mixed bed regeneration are relatively long, the industrial wastewater treatment equipment needs to be emptied every time the water quality filter backwashing and the mixed bed regeneration water are switched; the PH adjustment tank, reaction tank, flocculation tank, clarifier, clean water tank, and final neutralization tank are emptied. The emptying method: the PH adjustment tank, reaction tank, flocculation tank, and clarifier are all equipped with bottom drain valves, and the bottom sediment is first discharged to the pit sludge tank. The sludge tank will be transported to the sludge treatment room for centralized dehydration, and the upper clean water will be discharged back to the original industrial wastewater storage tank; the final neutralization tank is regularly cleaned with a submersible lift pump.

[0039] Step 2: The water in industrial wastewater storage tank A, industrial wastewater storage tank B, and industrial wastewater storage tank C is sent to the industrial wastewater treatment system through the outlet pipe for treatment. The process flow of the industrial wastewater treatment system is as follows: the outlet pipe is connected to the PH adjustment tank through a water pump; the PH adjustment tank is used to adjust the acid-base balance; the PH adjustment tank is connected to the reaction tank, and the outlet pipe of the reaction tank is connected to the flocculation tank; the flocculation tank is connected to the clarifier, and the outlet of the clarifier is connected to the final neutralization tank and the clean water tank; the final neutralization tank and the clean water tank adopt a rotary overflow design; the volume ratio of the clean water tank to the final neutralization tank is 4:1; according to the characteristics of the three water qualities, an automatic valve is set at the outlet of each industrial wastewater storage tank, and different dosing methods and residence times are adopted; (the residence time adopts the method of adjusting the manual valve of the lifting pump 1 or the frequency conversion method of the lifting pump 1 to change the treated water flow.)

[0040] A conductivity meter is installed behind the lifting pump of the clean water pool to determine the salt content in the water. When it is higher than the set value, it is judged as high-salt water and is treated with a zero-discharge system. Otherwise, it is filtered through an iron and manganese removal filter and then reused; the conductivity value is set at 20ms / cm.

[0041] Step 3: The water treated by the industrial wastewater treatment system from the backwash water of the fine treatment iron and manganese removal filter and the low-salt water of the mixed bed regeneration wastewater is collectively referred to as low-salt water. After passing through the clean water tank, it is pumped into the iron and manganese removal filter to remove the iron and manganese that affect the operation of the desulfurization system for a second time, and then sent to the desulfurization system for water replenishment;

[0042] Step 4: The high-salt water of mixed bed regeneration wastewater is sent into the thermal zero-emission system through a lifting pump after industrial wastewater treatment to achieve the treatment of high-salt water and the reuse of water resources.

[0043] A mixed bed regeneration high and low brine deep treatment and reuse system for a coal-fired power plant comprises an industrial wastewater storage tank A4, an industrial wastewater storage tank B5 and an industrial wastewater storage tank C6; the industrial wastewater storage tank A4, the industrial wastewater storage tank B5 and the industrial wastewater storage tank C6 are respectively used to store backwash water 1 of an iron and manganese removal filter to be finely treated, low brine 2 of mixed bed regeneration wastewater and high brine 3 of mixed bed regeneration wastewater.

[0044] The outlets of industrial wastewater storage tank A4, industrial wastewater storage tank B5 and industrial wastewater storage tank C6 are all connected to the main outlet pipe through automatic valves, and the main outlet pipe is connected to the pH adjustment tank 9, the reaction tank 10, the flocculation tank 11, the clarifier 12, the clean water tank 14 and the final neutralization tank 13 in sequence through the lifting pump 1; the outlet of the clean water tank 14 is connected to the lifting pump 2; the discharge port of the lifting pump 2 is provided with a low-salt water outlet pipe 15 and a high-salt water outlet pipe 16, wherein the low-salt water outlet pipe 15 is connected to the iron and manganese removal filter 17; the high-salt water outlet pipe 15 is connected to the thermal zero emission system 19.

[0045] In this embodiment, the backwash water of the iron and manganese removal filter is finely treated. Generally, backwashing is performed once every 45 days. The ion content is relatively low, about 0.1ms / cm in the Yangtze River region. The mixed bed is generally regenerated by controlling the acid concentration at 4-5% and the alkali concentration at 3-4%. After regeneration, it is discharged and then flushed with a large amount of water. The discharged wastewater and the initial flushing water (3-10 minutes) after regeneration are defined as high-salt water of mixed bed regeneration wastewater, and its conductivity is as high as 100ms / cm or more. The large amount of flushing in the later period is low-salt water of mixed bed regeneration wastewater, which is generally about 1-5ms / cm after mixing.

[0046] List of main equipment for zero emission (low temperature flash concentration + evaporation drying) construction and industrial wastewater upgrading and transformation of a coal-fired power plant:

[0047]

[0048]

[0049]

[0050]

[0051]

[0052] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A method for deep coupling zero-emission deep treatment and reuse of high and low brine in a coal-fired power plant, characterized by: The following steps are involved: Step 1: Reconstruct the drainage pipelines of the backwash water of the fine iron and manganese removal filter, the low-salt water of the mixed bed regeneration wastewater, and the high-salt water of the mixed bed regeneration wastewater. Send the backwash water of the fine iron and manganese removal filter to the industrial wastewater storage tank A, send the low-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank B, and send the high-salt water of the mixed bed regeneration wastewater to the industrial wastewater storage tank C for storage; and carry out corresponding anti-corrosion on the industrial wastewater storage tank and equipment according to the water quality to achieve quality-based recovery; Step 2: The water in industrial wastewater storage tank A, industrial wastewater storage tank B, and industrial wastewater storage tank C is sent to the industrial wastewater treatment system through the outlet pipe for treatment. Step 3: The water treated by the industrial wastewater treatment system from the backwash water of the fine treatment iron and manganese removal filter and the low-salt water of the mixed bed regeneration wastewater is collectively referred to as low-salt water. After passing through the clean water tank, it is pumped into the iron and manganese removal filter to remove the iron and manganese that affect the operation of the desulfurization system for a second time, and then sent to the desulfurization system for water replenishment; Step 4: The high-salt water of mixed bed regeneration wastewater is sent into the thermal zero-emission system through a lifting pump after industrial wastewater treatment to achieve the treatment of high-salt water and the reuse of water resources.

2. According to claim 1, a method for deep coupling zero-emission deep treatment and reuse of high and low brine in a coal-fired power plant, characterized in that: The process flow of the industrial wastewater treatment system is as follows: the outlet pipe is connected to the PH adjustment tank through a water pump; the PH adjustment tank is used to adjust the acid-base balance; the PH adjustment tank is connected to the reaction tank, and the outlet pipe of the reaction tank is connected to the flocculation tank; the flocculation tank is connected to the clarifier, and the outlet of the clarifier is connected to the final neutralization tank and the clean water tank; the final neutralization tank and the clean water tank adopt a rotary overflow design; the volume ratio of the clean water tank and the final neutralization tank is 4:

1.

3. According to claim 2, a method for deep coupling zero-emission deep treatment and reuse of high and low brine in a coal-fired power plant is characterized by: According to the characteristics of the three types of water quality, an automatic valve is set at the outlet of each industrial wastewater storage tank, and different dosing methods and residence times are adopted; the residence time adopts the method of adjusting the manual valve of lift pump 1 or the method of frequency conversion of lift pump 1 to change the treated water flow rate.

4. The method for deep coupling zero-discharge deep treatment and reuse of high and low brine in a coal-fired power plant according to claim 2 is characterized by: A conductivity meter is installed behind the lifting pump of the clean water pool to determine the salt content in the water. When it is higher than the set value, it is judged as high-salt water and is treated with a zero-discharge system. Otherwise, it is filtered through an iron and manganese removal filter and reused.

5. The method for deep coupling zero-discharge deep treatment and reuse of high and low brine in a coal-fired power plant according to claim 4 is characterized by: The conductivity value was set at 20 ms / cm.

6. The method for deep coupling zero-discharge deep treatment and reuse of high and low brine in a coal-fired power plant according to claim 2 is characterized by: The final neutralization tank is cleaned regularly using a submersible lift pump.

7. The method for deep coupling zero-discharge deep treatment and reuse of high and low brine in a coal-fired power plant according to claim 1 is characterized by: Since the backwashing cycle of the fine treatment iron and manganese removal filter and the mixed bed regeneration are relatively long, the industrial wastewater treatment equipment needs to be emptied each time the water quality filter backwashing and the mixed bed regeneration water are switched; the PH adjustment tank, reaction tank, flocculation tank, clarifier, clean water tank, and final neutralization tank are emptied. The emptying method: The PH adjustment tank, reaction tank, flocculation tank, and clarifier are all equipped with bottom drain valves, and the bottom sediment is first discharged to the pit sludge pool. The sludge pool will be transported to the sludge treatment room for centralized dehydration, and the upper clean water will be discharged back to the original industrial wastewater storage tank.

8. A high and low salt water deep coupling zero discharge deep treatment and reuse system for coal-fired power plants, characterized by: The invention comprises an industrial wastewater storage tank A (4), an industrial wastewater storage tank B (5) and an industrial wastewater storage tank C (6); wherein the outlets of the industrial wastewater storage tank A (4), the industrial wastewater storage tank B (5) and the industrial wastewater storage tank C (6) are all connected to a main outlet pipe through automatic valves, and the main outlet pipe is connected to a pH adjustment tank (9), a reaction tank (10), a flocculation tank (11), a clarifier (12), a clean water tank (14) and a final neutralization tank (13) in sequence through a lift pump 1; the outlet of the clean water tank (14) is connected to a lift pump 2; the discharge port of the lift pump 2 is provided with a low-salt water outlet pipe (15) and a high-salt water outlet pipe (16), wherein the low-salt water outlet pipe (15) is connected to an iron and manganese removal filter (17); and the high-salt water outlet pipe (15) is connected to a thermal zero-emission system (19).

9. A coal-fired power plant high and low brine deep coupling zero-discharge deep treatment and reuse system according to claim 8, characterized in that: Industrial wastewater storage tank A (4), industrial wastewater storage tank B (5) and industrial wastewater storage tank C (6) are used to store the backwash water of the iron and manganese removal filter (1) to be refined, the low-salt water of the mixed bed regeneration wastewater (2) and the high-salt water of the mixed bed regeneration wastewater (3), respectively.

10. A coal-fired power plant high and low brine deep coupling zero discharge deep treatment and reuse system according to claim 8, characterized in that: The final neutralization tank (13) and the clean water tank (14) adopt a rotary overflow design.

Images