A boiler water treatment device for thermal power plants
The boiler water treatment device for thermal power plants, which integrates pretreatment, softening, and fine treatment units, solves the problem of the lack of multi-stage purification in existing devices, achieves efficient purification and stable supply of boiler water, and ensures the safe operation of the boiler and the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG AISIJI MASCH MFG CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-03
AI Technical Summary
Existing boiler water treatment equipment in thermal power plants lacks a continuous multi-stage purification process, which cannot effectively remove impurities such as suspended solids, hardness substances and dissolved salts from the water, making it difficult to meet the stringent requirements of boilers for influent water quality.
A water treatment system integrating a pretreatment unit, a softening unit, and a fine treatment unit was designed. Through components such as a bar screen filter, a multi-media filter, a sodium ion exchanger, and a reverse osmosis membrane device, combined with a PLC controller, automated monitoring is achieved, and a continuous multi-stage purification process is constructed to perform preliminary purification, hardness reduction, and deep filtration on the raw water to ensure that the water quality meets the boiler water standards.
It achieves efficient and stable purification of boiler water, reduces the risk of scaling, extends the service life of boilers, reduces operation and maintenance costs, and ensures the safe and stable operation of thermal power plants.
Smart Images
Figure CN224450480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of auxiliary equipment for thermal power plant boilers, specifically a water treatment device for thermal power plant boilers. Background Technology
[0002] In the operation of thermal power plants, boilers are one of the core pieces of equipment. Their normal operation is directly related to the power generation efficiency and safety of the power plant. The quality of boiler water has a crucial impact on the boiler's operating status. If the water contains a lot of impurities, hardness substances (such as calcium and magnesium ions), and other harmful components, these substances will form scale on the boiler's heating surfaces during operation, reducing heat transfer efficiency, increasing energy consumption, causing boiler corrosion, shortening the boiler's service life, and even potentially leading to safety accidents.
[0003] The existing patent document CN219860917U discloses a wastewater treatment device for boilers in thermal power plants. This utility model uses a concentrated reagent box to add concentrated reagents for a concentration and precipitation reaction. Finally, a centrifugal dewatering machine separates the wastewater after the concentration and precipitation reaction, allowing the sludge and dust to be discharged from the waste pipe for cleaning. The clean water flows through the clean water pipe into the clean water disinfection tank for quality inspection. After passing the inspection, the water is reused, thus achieving a relatively complete wastewater treatment, saving water resources and protecting the environment.
[0004] However, existing boiler water treatment equipment in thermal power plants is not conducive to forming a continuous multi-stage purification process. The existing boiler water treatment equipment mainly relies on a concentration reagent box to complete the concentration and sedimentation reaction, and then separates the water through a centrifugal dewatering machine. This equipment focuses more on the purification and recycling of wastewater and does not have a graded treatment unit such as pretreatment, softening, and fine treatment. Therefore, it cannot carry out progressive treatment of raw water from preliminary purification to deep softening and then to high-precision filtration. It cannot specifically remove various impurities such as suspended solids, hardness substances and dissolved salts in the water, and it is difficult to meet the stringent requirements of boilers for the quality of incoming water. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] The purpose of this invention is to provide a boiler water treatment device for thermal power plants, in order to solve the problem mentioned in the background art that existing boiler water treatment devices for thermal power plants are not convenient for forming a continuous multi-stage purification process.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model provides the following technical solution: a boiler water treatment device for thermal power plants, comprising a pretreatment unit, a softening unit, a fine treatment unit, and a control unit, wherein the pretreatment unit is connected to the softening unit via a pipeline;
[0009] The softening unit is connected to the refining unit via a pipe, and the control unit is electrically connected to the pretreatment unit, the softening unit, and the refining unit respectively.
[0010] As a further improvement to the above solution, the pretreatment unit includes a raw water tank, a bar screen filter, and a multi-media filter connected in sequence. The outlet of the raw water tank is connected to the inlet of the bar screen filter through a pipe, and the outlet of the bar screen filter is connected to the inlet of the multi-media filter through a pipe.
[0011] As a further improvement to the above scheme, the multi-media filter is provided with an activated carbon layer, a quartz sand layer and an anthracite coal layer from top to bottom.
[0012] As a further improvement to the above solution, the softening treatment unit includes a sodium ion exchanger, the inlet of which is connected to the outlet of a multi-media filter via a pipe, and sodium ion exchange resin is disposed inside the sodium ion exchanger.
[0013] As a further improvement to the above solution, the sodium ion exchanger is connected to a regeneration device, which includes a salt tank and a regeneration pump. The salt tank is connected to the inlet of the regeneration pump via a pipe, and the outlet of the regeneration pump is connected to the sodium ion exchanger via a pipe.
[0014] As a further improvement to the above solution, the fine treatment unit includes a security filter, a reverse osmosis membrane device, and a high-pressure pump. The inlet of the security filter is connected to the outlet of the sodium ion exchanger via a pipe, the outlet of the security filter is connected to the inlet of the high-pressure pump via a pipe, and the outlet of the high-pressure pump is connected to the inlet of the reverse osmosis membrane device via a pipe.
[0015] As a further improvement to the above solution, the control unit includes a PLC controller and a touch screen. The PLC controller is electrically connected to the preprocessing unit, the softening unit, and the fine processing unit, respectively, and the touch screen is electrically connected to the PLC controller.
[0016] As a further improvement to the above solution, each pipeline is equipped with a solenoid valve and a flow meter, both of which are electrically connected to the control unit. The pretreatment unit, softening unit, and fine treatment unit are all equipped with a drain port at the bottom, and a drain valve is installed on the drain port.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. This boiler water treatment device for thermal power plants integrates a pretreatment unit, a softening unit, a fine treatment unit, and a control unit to construct a coherent and efficient water treatment system. The pretreatment unit first purifies the raw water to remove obstacles for subsequent treatment. The softening unit specifically reduces the hardness of the water to reduce the risk of boiler scaling from the source. The fine treatment unit performs deep purification to ensure that the water quality meets the stringent standards for boiler water. The control unit coordinates the operation of each unit to achieve automated control of the entire process. This integrated design allows each unit to perform its own function while working closely together, ensuring both the depth and precision of water treatment and improving the stability and efficiency of system operation. It also significantly reduces the cost of manual intervention and provides reliable water quality assurance for the safe and stable operation of thermal power plant boilers.
[0019] 2. The boiler water treatment device of this thermal power plant uses the sodium ion exchanger in the softening unit to exchange sodium ion exchange resin with calcium and magnesium ions in the water, which can reduce the hardness of the water and prevent scale formation caused by hardness substances during boiler operation. At the same time, the matching regeneration device can restore the activity of the exchange resin in time, ensuring the continuous effectiveness of softening treatment and extending the service life of the boiler.
[0020] 3. The boiler water treatment device of this thermal power plant further intercepts fine particles through the security filter of the fine treatment unit to prevent them from damaging the reverse osmosis membrane. Combined with the high-pressure pump to provide power to the reverse osmosis membrane device, the device utilizes the high-precision filtration characteristics of the reverse osmosis membrane to deeply remove dissolved salts, microorganisms and other harmful components from the water, so that the treated water quality meets the boiler's high-standard water requirements.
[0021] 4. The boiler water treatment device of this thermal power plant, through the PLC controller of the control unit and the solenoid valves, flow meters and other devices on each treatment unit and pipeline, realizes the automated monitoring and regulation of the entire water treatment process. Operators can conveniently view the equipment operating status and set parameters through the touch screen, reducing manual operation, improving treatment efficiency and stability, and reducing operation and maintenance costs. Attached Figure Description
[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0023] Figure 2 This is a schematic diagram of the frame structure of this utility model;
[0024] Figure 3 This is a three-dimensional structural diagram of the pretreatment unit of this utility model;
[0025] Figure 4 This is a three-dimensional structural diagram of the softening treatment unit and the fine treatment unit of this utility model.
[0026] In the diagram: 1. Pretreatment unit; 2. Softening unit; 3. Fine treatment unit; 4. Control unit; 5. Raw water tank; 6. Bar screen filter; 7. Multi-media filter; 8. Activated carbon layer; 9. Quartz sand layer; 10. Anthracite layer; 11. Sodium ion exchanger; 12. Regeneration device; 13. Brine tank; 14. Regeneration pump; 15. Security filter; 16. Reverse osmosis membrane device; 17. High-pressure pump; 18. PLC controller; 19. Touch screen. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a boiler water treatment device for thermal power plants, including a pretreatment unit 1, a softening unit 2, a fine treatment unit 3 and a control unit 4, wherein the pretreatment unit 1 is connected to the softening unit 2 through a pipeline;
[0029] The softening unit 2 is connected to the refining unit 3 via a pipe, and the control unit 4 is electrically connected to the pretreatment unit 1, the softening unit 2 and the refining unit 3 respectively.
[0030] Pretreatment unit 1 can perform preliminary purification of raw water. In softening treatment unit 2, sodium ion exchange resin is used to replace calcium and magnesium ions in the water to reduce hardness. Fine treatment unit 3 first intercepts fine particles, and then pressurizes the water to flow through reverse osmosis membrane to intercept dissolved salts and microorganisms, producing high-purity water. Control unit 4 uses a PLC controller combined with solenoid valves and flow meters to monitor and automatically adjust the operating parameters of each unit in real time to ensure that the treated water meets the boiler water requirements.
[0031] The pretreatment unit 1 includes a raw water tank 5, a bar screen filter 6, and a multi-media filter 7 connected in sequence. The outlet of the raw water tank 5 is connected to the inlet of the bar screen filter 6 through a pipe, and the outlet of the bar screen filter 6 is connected to the inlet of the multi-media filter 7 through a pipe. The multi-media filter 7 contains, from top to bottom, an activated carbon layer 8, a quartz sand layer 9, and an anthracite layer 10. The softening unit 2 includes a sodium ion exchanger 11. The inlet of the sodium ion exchanger 11 is connected to the outlet of the multi-media filter 7 through a pipe. The sodium ion exchanger 11 contains sodium ion exchange resin. The sodium ion exchanger 11 is connected to a regeneration device 12. The regeneration device 12 includes a brine tank 13 and a regeneration pump 14. The brine tank 13 is connected to the inlet of the regeneration pump 14 through a pipe, and the outlet of the regeneration pump 14 is connected to the sodium ion exchanger 11 through a pipe.
[0032] When using this device for boiler water treatment in thermal power plants, the raw water first enters the raw water tank 5 of the pretreatment unit 1 for temporary storage, and then is transported to the bar screen filter 6 through pipelines. The bar screen filter 6 intercepts large particulate impurities (such as silt, debris, etc.) in the raw water. The pre-purified water flows into the multi-media filter 7. In the multi-media filter 7, the water flows from top to bottom through the activated carbon layer 8, the quartz sand layer 9, and the anthracite layer 10. The activated carbon layer 8 adsorbs organic matter, odors, and some pigments in the water. The quartz sand layer 9 and the anthracite layer 10 further filter suspended particles and colloids, completing the pretreatment. The pre-treated water enters the sodium ion exchanger 11 of the softening treatment unit 2 through pipelines. The calcium and magnesium ions in the water undergo a displacement reaction with the sodium ion exchange resin, reducing the hardness of the water and preventing boiler scaling. When the adsorption capacity of the sodium ion exchange resin decreases, the control unit 4 starts the regeneration device 12. The regeneration pump 14 transports the brine in the brine tank 13 to the sodium ion exchanger 11, regenerating the resin and restoring its exchange capacity.
[0033] The fine treatment unit 3 includes a security filter 15, a reverse osmosis membrane device 16, and a high-pressure pump 17. The inlet of the security filter 15 is connected to the outlet of the sodium ion exchanger 11 through a pipe, and the outlet of the security filter 15 is connected to the inlet of the high-pressure pump 17 through a pipe. The outlet of the high-pressure pump 17 is connected to the inlet of the reverse osmosis membrane device 16 through a pipe. The control unit 4 includes a PLC controller 18 and a touch screen 19. The PLC controller 18 is electrically connected to the pretreatment unit 1, the softening treatment unit 2, and the fine treatment unit 3, respectively. The touch screen 19 is electrically connected to the PLC controller 18. Each pipe is equipped with a solenoid valve and a flow meter, both of which are electrically connected to the control unit 4. The pretreatment unit 1, the softening treatment unit 2, and the fine treatment unit 3 are all equipped with drain outlets at the bottom, and drain valves are installed on the drain outlets.
[0034] After softening, the water enters the fine treatment unit 3. First, it passes through the security filter 15 to remove fine particles and colloids, protecting downstream equipment. Then, under the pressure of the high-pressure pump 17, the water flows into the reverse osmosis membrane device 16. The reverse osmosis membrane removes dissolved salts, microorganisms, and other impurities from the water, producing high-purity water. Throughout the process, the PLC controller 18 of the control unit 4 monitors the water flow status in real time through the solenoid valves and flow meters on the pipeline, and automatically adjusts the operating parameters of each unit (such as inlet flow rate, equipment start-up and shutdown). Operators can view the operating data and make manual interventions through the touch screen 19. In addition, the drain ports at the bottom of the pretreatment unit 1, softening unit 2, and fine treatment unit 3 can periodically discharge impurities. The drain valve controls the draining process to ensure that each unit operates continuously and stably, ultimately making the treated water meet the boiler water requirements.
[0035] Working Principle: When using this device for boiler water treatment in thermal power plants, raw water first enters the raw water tank 5 of pretreatment unit 1 for temporary storage, and then is transported through pipelines to the bar screen filter 6. The bar screen filter 6 intercepts large particulate impurities (such as silt, debris, etc.) in the raw water. The pre-purified water flows into the multi-media filter 7. In the multi-media filter 7, the water flows from top to bottom through the activated carbon layer 8, the quartz sand layer 9, and the anthracite layer 10. The activated carbon layer 8 adsorbs organic matter, odors, and some pigments in the water. The quartz sand layer 9 and the anthracite layer 10 further filter suspended particles and colloids, completing the pretreatment. The pre-treated water enters the sodium ion exchanger 11 of softening unit 2 through pipelines. Calcium and magnesium ions in the water undergo a displacement reaction with the sodium ion exchange resin, reducing the water hardness and preventing boiler scaling. When the adsorption capacity of the sodium ion exchange resin decreases, the control unit 4 starts the regeneration device 12, and the regeneration pump 14 delivers salt... The brine in tank 13 is transported to sodium ion exchanger 11 to regenerate the resin and restore its exchange capacity. The softened water then enters fine treatment unit 3, where it first passes through security filter 15 to remove fine particles and colloids, protecting downstream equipment. Subsequently, under the pressure of high-pressure pump 17, the water flows into reverse osmosis membrane device 16, where the reverse osmosis membrane removes dissolved salts, microorganisms, and other impurities, producing high-purity water. Throughout the process, the PLC controller 18 of control unit 4 monitors the water flow status in real time through solenoid valves and flow meters on the pipeline, automatically adjusting the operating parameters of each unit (such as inlet flow rate, equipment start-up and shutdown). Operators can view the operating data and make manual interventions through touch screen 19. In addition, the drain outlets at the bottom of pretreatment unit 1, softening unit 2, and fine treatment unit 3 can periodically discharge impurities, and the drain valve controls the draining process to ensure continuous and stable operation of each unit, ultimately ensuring that the treated water meets the boiler water requirements.
[0036] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.
Claims
1. A water treatment apparatus for a boiler of a thermal power plant, characterized in that: It includes a pretreatment unit (1), a softening treatment unit (2), a fine treatment unit (3), and a control unit (4), wherein the pretreatment unit (1) is connected to the softening treatment unit (2) via a pipeline; The softening unit (2) is connected to the fine treatment unit (3) via a pipe, and the control unit (4) is electrically connected to the pretreatment unit (1), the softening unit (2) and the fine treatment unit (3) respectively.
2. A device for water treatment of a boiler of a thermal power plant according to claim 1, characterized in that: The pretreatment unit (1) includes a raw water tank (5), a bar screen filter (6) and a multi-media filter (7) connected in sequence. The outlet of the raw water tank (5) is connected to the inlet of the bar screen filter (6) through a pipe, and the outlet of the bar screen filter (6) is connected to the inlet of the multi-media filter (7) through a pipe.
3. A device for water treatment of a boiler of a thermal power plant according to claim 2, characterized in that: The multi-media filter (7) is provided with an activated carbon layer (8), a quartz sand layer (9) and an anthracite coal layer (10) arranged from top to bottom.
4. A boiler water treatment device for thermal power plants according to claim 1, characterized in that: The softening unit (2) includes a sodium ion exchanger (11), the inlet of which is connected to the outlet of a multi-media filter (7) via a pipe, and sodium ion exchange resin is provided inside the sodium ion exchanger (11).
5. A device for water treatment of a boiler of a thermal power plant according to claim 4, characterized in that: The sodium ion exchanger (11) is connected to a regeneration device (12), which includes a salt tank (13) and a regeneration pump (14). The salt tank (13) is connected to the inlet of the regeneration pump (14) through a pipe, and the outlet of the regeneration pump (14) is connected to the sodium ion exchanger (11) through a pipe.
6. A device for water treatment of a boiler of a thermal power plant according to claim 1, characterized in that: The fine treatment unit (3) includes a security filter (15), a reverse osmosis membrane device (16), and a high-pressure pump (17). The inlet of the security filter (15) is connected to the outlet of the sodium ion exchanger (11) through a pipe. The outlet of the security filter (15) is connected to the inlet of the high-pressure pump (17) through a pipe. The outlet of the high-pressure pump (17) is connected to the inlet of the reverse osmosis membrane device (16) through a pipe.
7. A device for water treatment of a boiler of a thermal power plant according to claim 1, characterized in that: The control unit (4) includes a PLC controller (18) and a touch screen (19). The PLC controller (18) is electrically connected to the pre-processing unit (1), the softening unit (2) and the fine processing unit (3) respectively. The touch screen (19) is electrically connected to the PLC controller (18).
8. A device for water treatment of a boiler of a thermal power plant according to claim 1, characterized in that: Each pipeline is equipped with a solenoid valve and a flow meter. The solenoid valve and the flow meter are electrically connected to the control unit (4). The pretreatment unit (1), the softening treatment unit (2), the fine treatment unit (3), and the bottom are all equipped with a drain port, and the drain port is equipped with a drain valve.