Condensate polishing water-saving system for thermal power plant

Abstract

The utility model discloses a kind of condensate water fine treatment operation water-saving system of thermal power plant, including negative resin tank, positive resin tank and pressurizing assembly, negative resin tank is used to remove the anion impurities adsorbed in condensate water;Positive resin tank is used to remove the cation impurities adsorbed in condensate water;Pressurizing assembly includes main pipeline, first branch pipe and second branch pipe, first branch pipe and negative resin tank top interface intercommunication, second branch pipe and positive resin tank top interface intercommunication, main pipeline includes first end, first branch pipe is away from negative resin tank one end and second branch pipe is away from positive resin tank one end convergence after with the first end of main pipeline intercommunication.By the way of passing into oil-free compressed gas medium, the pressure in tank can be significantly improved, the pressurized environment can speed up the discharge speed of wastewater, regenerated liquid, impurities etc. in tank, and thereby reduce water consumption, and shorten the regeneration time.

Description

Technical Field

[0001] This utility model relates to the technical field of water-saving systems for thermal power plants, and more specifically, to a water-saving system for the operation of condensate polishing in thermal power plants. Background Technology

[0002] my country's water shortage problem is becoming increasingly severe, posing a serious challenge to the sustainable development of various industries. Thermal power plants, as major water consumers, account for a significant proportion of industrial water use, and their water use efficiency and water-saving measures are of great importance in alleviating water pressure. According to relevant statistics, water consumption in thermal power plants is mainly concentrated in cooling systems and condensate polishing systems. Traditional polishing systems suffer from numerous water waste problems during operation, which not only increase the operating costs of thermal power plants but also adversely affect the sustainable use of water resources.

[0003] Specifically, traditional condensate treatment systems suffer from several water waste issues during operation: high water consumption during backwashing and forward washing in the resin regeneration process; failure to meet conductivity standards during forward washing necessitates regeneration; and increased discharge of saline wastewater and consumption of demineralized water are also observed. To address these issues, a water-saving condensate treatment system for thermal power plants is proposed. Utility Model Content

[0004] In view of this, the present invention provides a water-saving system for condensate polishing in thermal power plants, which solves at least one technical problem existing in the prior art.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solution: An embodiment of this utility model provides a water-saving system for condensate polishing in thermal power plants, including an anion resin tank, a cation resin tank, and a pressurizing assembly. The anion resin tank is used to remove anionic impurities adsorbed in the condensate; the cation resin tank is used to remove cationic impurities adsorbed in the condensate; the pressurizing assembly includes a main pipe, a first branch pipe, and a second branch pipe. The first branch pipe is connected to the top interface of the anion resin tank, and the second branch pipe is connected to the top interface of the cation resin tank. The main pipe includes a first end, and the ends of the first branch pipes away from the anion resin tank and the second branch pipes away from the cation resin tank converge and connect to the first end of the main pipe.

[0006] Optionally, the pressurization assembly further includes a first valve and a second valve, wherein the first valve is disposed on the first branch pipe and the second valve is disposed on the second branch pipe.

[0007] Optionally, the first valve and the second valve are pneumatic valves.

[0008] Optionally, the pressurization assembly further includes a pressurization section connected to the main pipeline, the pressurization section being used to provide an oil-free compressed gas medium.

[0009] Optionally, the pressurization assembly further includes a first pressure measuring element and a second pressure measuring element, wherein the measuring end of the first pressure measuring element is disposed inside the anion resin tank, and the measuring end of the second pressure measuring element is disposed inside the cation resin tank.

[0010] Optionally, the condensate polishing and water-saving system of the thermal power plant further includes an isolation tank, which is connected to the anion resin tank and the cation resin tank respectively.

[0011] Optionally, the condensate polishing and water-saving system of the thermal power plant further includes a blower, the air outlet of which is connected to the anion resin tank and the cation resin tank respectively.

[0012] Optionally, the condensate polishing and water-saving system of the thermal power plant further includes a flushing water pump, which is connected to the anion resin tank, the cation resin tank and the isolation tank respectively.

[0013] Optionally, the condensate polishing and water-saving system of the thermal power plant further includes an alkali metering tank and an alkali injector, wherein the alkali metering tank is connected to the anion resin tank through the alkali injector.

[0014] Optionally, the water-saving system for condensate polishing in thermal power plants also includes an acid metering tank and an acid injector, wherein the acid metering tank is connected to the cation exchange tank via the acid injector.

[0015] By employing the above technical solution, this utility model has at least the following beneficial effects:

[0016] This application provides a water-saving system for the operation of condensate polishing in thermal power plants. In the rapid discharge of particulate matter from resin washing, a pressurizing component pressurizes the anion resin tank to rapidly drain the resin from the middle and bottom, removing fine particulate matter. Similarly, in the rapid emptying of the anion resin tank of alkaline solution and washed-off particulate matter, the pressurizing component pressurizes the anion resin tank to rapidly drain the resin from the middle and bottom, removing fine particulate matter. Likewise, in the rapid emptying of the cation resin tank of acidic solution and washed-off particulate matter, the pressurizing component pressurizes the cation resin tank to rapidly drain the resin from the middle and bottom, removing fine particulate matter. By introducing an oil-free compressed gas medium, the pressure inside the tank can be significantly increased. This pressurized environment accelerates the discharge of wastewater, regenerated liquid, and impurities from the tank, thereby reducing water consumption and shortening regeneration time. Attached Figure Description

[0017] Figure 1A schematic diagram of a water-saving system for condensate polishing in a thermal power plant, provided as an embodiment of this utility model. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] See also Figure 1 As shown in the embodiments of this application, a water-saving system for condensate polishing in a thermal power plant is provided, including an anion resin tank 100, a cation resin tank 200, and a pressurizing assembly. The anion resin tank 100 is used to remove anionic impurities adsorbed in the condensate; the cation resin tank 200 is used to remove cationic impurities adsorbed in the condensate; the pressurizing assembly includes a main pipe, a first branch pipe, and a second branch pipe. The first branch pipe is connected to the top interface of the anion resin tank 100, and the second branch pipe is connected to the top interface of the cation resin tank 200. The main pipe includes a first end, and the ends of the first branch pipe away from the anion resin tank 100 and the second branch pipe away from the cation resin tank 200 converge and are connected to the first end of the main pipe.

[0023] In the rapid discharge process of particulate matter from resin scrubbing, the anion resin tank is pressurized by a pressurizing component to quickly drain the middle and bottom of the scrubbed resin, removing fine particles. Similarly, in the rapid emptying process of the anion resin tank containing alkali and scrubbed particles, the same process is used. Likewise, in the rapid emptying process of the cation resin tank containing acid and scrubbed particles, the same process is used. By introducing an oil-free compressed gas medium, the pressure inside the tank can be significantly increased. This pressurized environment accelerates the discharge of wastewater, regenerated liquid, and impurities, thereby reducing water consumption and shortening regeneration time.

[0024] In another embodiment, the pressurization assembly further includes a first valve 1 and a second valve 2, with the first valve 1 disposed on a first branch pipe and the second valve 2 disposed on a second branch pipe. The first valve 1 and the second valve 2 are used to pressurize the anion resin tank 100 and the cation resin tank 200 by introducing oil-free compressed gas media.

[0025] In this embodiment, both the first valve 1 and the second valve 2 should be one-way valves to ensure that the gas pressure in the pressurized anion resin tank 100 and cation resin tank 200 remains stable.

[0026] In other embodiments, the types of the first valve 1 and the second valve 2 can be reasonably selected according to the specific working conditions.

[0027] In another embodiment, the first valve 1 and the second valve 2 are pneumatic valves. Pneumatic valves operate very quickly, enabling them to switch from fully open to fully closed or from fully closed to fully open in a short time.

[0028] In another embodiment, the pressurization assembly further includes a pressurization section connected to the main pipeline, the pressurization section being used to provide an oil-free compressed gas medium.

[0029] Specifically, by opening the outlet of the pressurizing unit, the oil-free compressed gas medium enters the main pipe and the first branch pipe sequentially into the anion resin tank 100; or it enters the cation resin tank 200 through the main pipe and the second branch pipe, pressurizing the anion resin tank 100 or the cation resin tank 200. The pressure is used to quickly discharge the liquid in the anion resin tank 100 or the cation resin tank 200, thereby reducing water consumption and time.

[0030] In this embodiment, the oil-free compressed gas medium is oil-free compressed air, and the pressurization unit is a compressed air storage tank. In other embodiments, the oil-free compressed gas medium may also be oil-free compressed nitrogen.

[0031] In another embodiment, the pressurization assembly further includes a first pressure measuring element and a second pressure measuring element, wherein the measuring end of the first pressure measuring element is disposed in the anion resin tank 100, and the measuring end of the second pressure measuring element is disposed in the cation resin tank 200.

[0032] The first pressure measuring device is used to measure the gas pressure inside the anion resin tank, while the second pressure measuring device is used to measure the gas pressure inside the cation resin tank. This is used to control the pressure inside the anion resin tank 100 or the cation resin tank 200 to reach the set value, so as to control the drainage water level inside the tank and prevent the washing resin from being lost due to improper drainage water level control. At the same time, the drainage water level control enables the rapid discharge of acid and alkali liquids and impurities.

[0033] Specifically, when the first pressure measuring device detects that the pressure inside the anion resin tank 100 is less than the set pressure value, or when the second pressure measuring device detects that the pressure inside the cation resin tank 200 is less than the set pressure value, the collected data is fed back to the central controller. The central controller displays a pressure abnormality alarm, and the alarm triggers the suspension of the current process. Compressed air is introduced into the anion resin tank 100 or the cation resin tank 200 through the compressed air storage tank to adjust the pressure to the set value. Then, the central controller triggers the resumption of the current process.

[0034] Specifically, in this embodiment, both the first and second pressure measuring elements are pressure sensors, and the central controller is a computer.

[0035] In another embodiment, the condensate polishing water-saving system in a thermal power plant also includes an isolation tank 300, which is connected to both anion resin tank 100 and cation resin tank 200. In this system, resin separation and regeneration are critical steps. The isolation tank 300 serves to temporarily store a portion of the resin or as an intermediate link in resin transport. Due to the differences in density and chemical properties between cation and anion resins, the cation resin typically lies in the lower layer during separation, while the anion resin lies in the upper layer. Connecting the isolation tank 300 to both anion resin tank 100 and cation resin tank 200 facilitates resin separation, transport, and regeneration operations, reducing the risk of cross-contamination.

[0036] In another embodiment, the water-saving system for condensate polishing in thermal power plants also includes a blower, the blower's outlet of which is connected to both the anion resin tank 100 and the cation resin tank 200. The blower, by forcibly delivering gas, provides sufficient air volume for the scrubbing process, effectively driving water or gas through the resin layer. This blows or washes away impurities, suspended solids, and microorganisms from the resin surface, maintaining the cleanliness and efficient operation of the resin. Simultaneously, under pneumatic conditions, the mixed flow of gas or water enhances the friction between resin particles, further removing dirt adhering to the resin surface. This physical scrubbing action restores the cleanliness of the resin surface, enhancing regeneration and extending its cycle water production.

[0037] In this embodiment, the blower is a Roots blower.

[0038] In another embodiment, the condensate polishing operation water-saving system of the thermal power plant also includes a flushing water pump, which is connected to the anion resin tank 100, the cation resin tank 200 and the isolation tank 300 respectively.

[0039] In another embodiment, the condensate polishing operation water-saving system of the thermal power plant also includes an alkali metering tank and an alkali injector, with the alkali metering tank connected to the anion resin tank 100 via the alkali injector.

[0040] The outlet of the alkali metering tank is connected to the inlet of the alkali injector via a pipe, and the outlet of the alkali injector is connected to the anion resin tank 100 via a pipe for the regeneration of the anion resin.

[0041] When alkali solution is introduced into the anion resin tank 100, the inlet of the flushing water pump is connected to the demineralized water input pipe, and the outlet is divided into two paths, the first path and the second path. The first path is connected to the alkali injector through the alkali regeneration water flow regulating valve. The negative pressure generated by the alkali injector draws in the alkali solution in the alkali metering tank, dilutes it to the concentration of alkali solution required for regeneration, and then sends it into the anion resin tank 100 for regeneration.

[0042] In another embodiment, the condensate polishing operation water-saving system of the thermal power plant also includes an acid metering tank and an acid injector, the acid metering tank being connected to the cation resin tank 200 via the acid injector.

[0043] The outlet of the acid metering tank is connected to the inlet of the acid injector via a pipe, and the outlet of the acid injector is connected to the cation resin tank 200 via a pipe for the regeneration of the cation resin.

[0044] When acid is introduced into the cation exchange resin tank 200, the inlet of the flushing water pump is connected to the demineralized water input pipe, and the outlet is divided into two paths, the first path and the second path. The second path is connected to the acid injector through the acid regeneration water flow regulating valve. The acid injector draws in the acid metering tank through the negative pressure, dilutes it to the acid concentration required for regeneration, and then sends it into the cation exchange resin tank 200 for regeneration.

[0045] The post-replacement cleaning method changes the original cleaning control method of scrubbing-backwashing after replacing anion and cation resins to a method of scrubbing-backwashing with water inlet, bottom rinsing around the perimeter (pressurized drainage), and full water filling. This reduces the water consumption for resin backwashing and forward rinsing demineralized water, while also shortening the drainage time due to increased pressure.

[0046] like Figure 1 As shown, where:

[0047] 001-01 is the pipeline from the alkali injector to the anion resin tank.

[0048] 001-02 are the air supply pipes for the Roots blower.

[0049] 001-03 is the pipeline from the acid injector to the cation resin tank.

[0050] 001-04 are the water supply pipes for the flushing water pump.

[0051] 001-05 are mixed bed resin delivery pipes.

[0052] 001-06 is the drainage ditch leading to the neutralization pond.

[0053] 001-07 refers to the drainage ditch leading to the neutralization pond.

[0054] 001-08 refers to the drainage ditch leading to the neutralization pond.

[0055] The following is a detailed explanation of the specific process of the water-saving system for condensate polishing in thermal power plants:

[0056] Resin scrubbing:

[0057] Lowering the liquid level in the anion resin tank 100: Open the first valve 1 and the middle drain valve 012 on the anion resin tank 100 to drain water until no water is discharged from the middle drain valve 012, then close the first valve 1;

[0058] Air Scrubbing: Open the scrubbing air inlet valve 006 and exhaust valve 009 of the anion resin tank 100, close the middle exhaust valve 012 and the drain valve of the Roots blower outlet pipe, start the Roots blower for scrubbing, and continue for 5 minutes; after scrubbing, turn off the Roots blower, open the drain valve of the Roots blower outlet pipe, and close the scrubbing air inlet valve 006 and exhaust valve 009 of the anion resin tank 100;

[0059] Let stand for 2 minutes;

[0060] Backwash: Open the backwash water inlet valve 004 and backwash outlet valve 010 of the anion resin tank 100, start the flushing water pump for backwashing, and continue for 20 minutes; after backwashing is completed, close the backwash water inlet valve 004, the backwash outlet valve 010 and the flushing water pump.

[0061] Rapid discharge of scrubbing particles: Pressurize the anion resin tank 100 through the pressurization component, open the first valve 1 to pressurize to the set value, and then open the middle drain door 012 and the bottom drain door 015. Under the pressure inside the tank, the scrubbed resin is rapidly drained from the middle and bottom until all the fine particles are discharged. Then close the first valve 1, the middle drain door 012 and the bottom drain door 015.

[0062] Anion resin regeneration

[0063] Anion resin tank 100 drainage and alkali inlet: Open the middle drain door 012, high-level drain door 014 and exhaust door 009 of anion resin tank 100 to drain water until no water is discharged from the high-level drain door 014; at the same time, open the inlet door of the alkali metering tank, and close the inlet door of the alkali metering tank when the liquid level in the alkali metering tank is at the high level.

[0064] Pre-spraying: Open the alkali inlet valve 003 of the anion resin tank 100, and close the intermediate exhaust valve 012 and the exhaust valve 009; open the inlet valve of the alkali injector, and open the manual inlet and outlet valves of the hot water tank; start the flushing water pump and adjust the flow rate to 10t / h;

[0065] Alkali introduction: After 60 seconds, open the outlet door of the alkali metering tank and use the manual outlet door of the hot water tank to adjust the alkali concentration to 3% to 5%. Continue alkali introduction for about 45 minutes.

[0066] Replacement: After the alkali solution has been completely added, close the outlet door of the alkali metering tank and perform replacement for 50 minutes;

[0067] Air scrubbing: Stop the flushing water pump, close the alkali inlet valve 003 and the high-level drain valve 014 of the anion resin tank, open the exhaust valve 009 and the scrubbing air inlet valve 006; close the alkali injector inlet valve; close the Roots blower outlet drain valve, and start the Roots blower to scrub for 5 minutes.

[0068] Backwash water intake: Open the drain valve at the outlet of the Roots blower and turn off the Roots blower; close the scrubbing air inlet valve 006, open the backwash water inlet valve 004 of the anion resin tank 100, start the flushing water pump to carry backwash water in. After the backwash water enters the exhaust valve 009 of the anion resin tank 100, the flushing water pump stops and all valves are closed.

[0069] Rinsing around and at the bottom: Pressurize the anion resin tank 100 through the pressurization component, open the first valve 1 to pressurize to the set value; then open the middle drain door 012 and the bottom drain door 015, and under the pressure inside the tank, quickly drain the resin in the middle and at the bottom until all the fine particles are discharged, and then close the first valve 1, the middle drain door 012 and the bottom drain door 015.

[0070] Full water: Open the positive wash water inlet valve 001 and the exhaust valve 009 of the anion resin tank 100; start the flushing water pump and fill the tank with water until water flows out of the exhaust valve 009;

[0071] Secondary separation: Open the stratification water valve 005 and exhaust valve 009 of the anion resin tank 100, and close the positive wash water inlet valve 001; secondary separation for 5 minutes;

[0072] Secondary separation resin transport: Open the resin door 020 and air door 018 of the isolation tank 300; close the exhaust door 009 of the anion resin tank 100; open the resin outlet door 013 and the stratification water door 005 of the anion resin tank 100; transport for 0.5 minutes.

[0073] Resin pipeline flushing: Open the resin pipeline flushing door 021 of the cation resin tank 200, and close the stratification water door 005 and resin outlet door 013 of the anion resin tank 100; after 2 minutes, open the vent door 009 and resin outlet door 013 of the anion resin tank 100; close the resin door 020 and air door 018 of the isolation tank 300. After flushing for 2 minutes, close the resin outlet door 013 and vent door 009 of the anion resin tank 100, and the resin pipeline flushing door 021 of the cation resin tank 200.

[0074] Anion resin positive washing

[0075] Open the forward wash water inlet valve 001 and bottom drain valve 015 of the anion resin tank 100, start the flushing water pump, and control the forward wash flow rate to 27t / h. Forward wash until the conductivity of the effluent is <5μs / cm, then stop the flushing water pump and close the forward wash water inlet valve 001 and bottom drain valve 015.

[0076] The sequence of air scrubbing, backwashing with water, bottom rinsing, and full water filling can be set with a number of cycles. Compared with the existing method of directly backwashing after air scrubbing, this reduces the consumption of demineralized water and shortens the resin forward washing time, thus reducing the consumption of demineralized water during the forward washing stage.

[0077] Cation resin regeneration

[0078] Draining and Acid Inleting of Cation Resin Tank 200: Open the middle drain valve 032, high drain valve 034 and exhaust valve 029 of cation resin tank 200; drain until no water is discharged from high drain valve 034; at the same time, open the inlet door of acid metering tank, and close the inlet door of acid metering tank when the liquid level in acid metering tank is high.

[0079] Pre-spraying: Open the acid inlet valve 024 of the cation exchange resin tank 200, close the middle exhaust valve 032 and the exhaust valve 029; open the acid injector inlet valve, start the flushing water pump, and adjust the flow rate to 10t / h;

[0080] Acid introduction: After 60 seconds, open the outlet door of the acid metering tank and use the manual outlet door of the acid metering tank to adjust the acid concentration. The concentration should be controlled at around 4% to 6%. Acid introduction takes about 40 minutes.

[0081] Replacement: Close the outlet door of the acid metering tank and perform replacement for 40 minutes;

[0082] Air scrubbing: Stop the flushing water pump, close the acid inlet valve 024 and high exhaust valve 034 of the cation resin tank 200; close the acid injector inlet valve; open the scrubbing air inlet valve 026 and exhaust valve 029 of the cation resin tank 200; close the drain valve of the Roots blower outlet, and start the Roots blower for scrubbing for 5 minutes.

[0083] Backwash water intake: Open the drain valve at the outlet of the Roots blower and turn off the Roots blower; close the scrubbing air inlet valve 026 of the cation resin tank 200; open the backwash inlet valve 025 of the cation resin tank 200, start the flushing water pump to carry backwash water intake, and stop the flushing water pump after the backwash water intake reaches the outlet of the cation resin tank 200, and close all valves.

[0084] Rinsing around and at the bottom: Pressurize the cation resin tank 200 through the pressurizing component and open the second valve 2 to pressurize to the set value; then open the middle drain door 032 and the bottom drain door 035 of the cation resin tank 200, and under the pressure inside the tank, quickly drain the resin after wiping through the middle and bottom until all the fine particles are discharged; then close the second valve 2, the middle drain door 032 and the bottom drain door 035 of the cation resin tank 200.

[0085] Full water: Open the positive wash inlet valve 022 and the exhaust valve 029 of the cation resin tank 200; start the flushing water pump and fill the tank with water until water flows out of the exhaust valve 029;

[0086] This system allows for setting the number of cycles for air scrubbing, backwashing with water inlet, bottom rinsing, and full water filling. Compared to the original system where backwashing is performed directly after air scrubbing, it reduces the consumption of demineralized water and shortens the resin forward washing time, thus reducing the consumption of demineralized water during the forward washing stage.

[0087] Forward wash: Open the forward wash inlet valve 022 and bottom drain valve 035 of the cation exchange resin tank 200; close the backwash inlet valve 025 and exhaust valve 029; start the flushing water pump, control the flow rate at 27t / h, and flush until the conductivity of the effluent is less than 5μs / cm. Then stop the flushing water pump and close the forward wash inlet valve 022 and bottom drain valve 035 of the cation exchange resin tank 200.

[0088] Rapid particulate matter discharge process: A pressurization assembly is added to the anion resin tank 100 and the cation resin tank 200 to pressurize the tanks. After pressurization, the middle discharge door (such as 012, 032) and the bottom discharge door (such as 015, 035) are quickly opened to discharge the fine particulate matter after scrubbing, reducing the number of scrubbing operations and the amount of wastewater.

[0089] Rapid rinsing process: Between resin replacement and the main rinsing stage, compressed air is used to pressurize the tank, accelerating the rinsing process. Through the coordinated operation of the middle and bottom drain doors, rinsing wastewater is quickly discharged, significantly shortening rinsing time and reducing water consumption.

[0090] Water-saving process optimization: In the resin scrubbing, backwashing, displacement, and forward washing stages, pressurization and rapid drainage technologies can quickly achieve qualified water quality for the forward wash effluent, reducing the consumption of demineralized water during backwashing and forward washing. The newly added steps seamlessly integrate with the existing system, achieving water-saving goals without large-scale modifications.

[0091] This application utilizes rapid particulate matter emission and rapid rinsing technologies to reduce the consumption of demineralized water during backwashing and forward washing, quickly achieving qualified effluent quality for forward washing. The optimized process reduces wastewater generation, lowering subsequent wastewater treatment costs. It shortens resin regeneration time and improves the overall system operating efficiency. The newly added pressurization component is compatible with the existing system, simplifying modification and reducing costs. This system features a simple structure, strong compatibility, and low cost, making it significant for improving the water resource utilization efficiency of thermal power plants.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water-saving system for condensate polishing in thermal power plants, characterized in that, include: An anion resin tank (100) and a cation resin tank (200), wherein the anion resin tank (100) is used to remove anionic impurities adsorbed in condensate; and the cation resin tank (200) is used to remove cationic impurities adsorbed in condensate. The pressurization assembly includes a main pipe, a first branch pipe, and a second branch pipe. The first branch pipe is connected to the top interface of the anion resin tank (100), and the second branch pipe is connected to the top interface of the cation resin tank (200). The main pipe includes a first end. The end of the first branch pipe away from the anion resin tank (100) and the end of the second branch pipe away from the cation resin tank (200) converge and are connected to the first end of the main pipe.

2. The water-saving system for condensate polishing in thermal power plants according to claim 1, characterized in that, The pressurization assembly also includes a first valve (1) and a second valve (2), wherein the first valve (1) is disposed on the first branch pipe and the second valve (2) is disposed on the second branch pipe.

3. The water-saving system for condensate polishing in thermal power plants according to claim 2, characterized in that, The first valve (1) and the second valve (2) are pneumatic valves.

4. The water-saving system for condensate polishing in thermal power plants according to claim 1, 2, or 3, characterized in that, The pressurization assembly also includes a pressurization section connected to the main pipeline, which is used to provide an oil-free compressed gas medium.

5. The water-saving system for condensate polishing in thermal power plants according to claim 4, characterized in that, The pressurization assembly further includes a first pressure measuring element and a second pressure measuring element. The measuring end of the first pressure measuring element is disposed inside the anion resin tank (100), and the measuring end of the second pressure measuring element is disposed inside the cation resin tank (200).

6. The water-saving system for condensate polishing in thermal power plants according to claim 5, characterized in that, The water-saving system for condensate polishing in thermal power plants also includes an isolation tank (300), which is connected to the anion resin tank (100) and the cation resin tank (200) respectively.

7. The water-saving system for condensate polishing in thermal power plants according to claim 5, characterized in that, The water-saving system for condensate polishing in thermal power plants also includes a blower, the outlet of which is connected to the anion resin tank (100) and the cation resin tank (200) respectively.

8. The water-saving system for condensate polishing in thermal power plants according to claim 6, characterized in that, The water-saving system for condensate polishing in thermal power plants also includes a flushing water pump, which is connected to the anion resin tank (100), the cation resin tank (200), and the isolation tank (300).

9. The water-saving system for condensate polishing in thermal power plants according to claim 5, characterized in that, The water-saving system for condensate polishing in thermal power plants also includes an alkali metering tank and an alkali injector, wherein the alkali metering tank is connected to the anion resin tank (100) via the alkali injector.

10. The water-saving system for condensate polishing in thermal power plants according to claim 5, characterized in that, The water-saving system for condensate polishing in the thermal power plant also includes an acid metering tank and an acid injector, wherein the acid metering tank is connected to the cation resin tank (200) via the acid injector.

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