Closed circulating device for cooling demineralized water of thermal power generating unit

Abstract

The invention relates to the technical field of demineralized water treatment devices, in particular to a thermal power generating unit cooling demineralized water closed circulation device which comprises a base, and a cation exchanger and an anion exchanger are fixedly installed on the two sides of the front end of the upper end face of the base respectively. The water inlet end of the top of the back face of the cation exchanger communicates with a water guide pipe, the water outlet end of the cation exchanger communicates with the water inlet end of the top of the back face of the anion exchanger through a guide pipe, a second valve is arranged on the guide pipe, and a hole is formed in the top of the anion exchanger and communicates with a liquid inlet pipe. The two sides of the end, away from the anion exchanger, of the liquid inlet pipe communicate with a solution communicating pipe and a clear water communicating pipe correspondingly, and the water outlet end of the bottom of the back face of the anion exchanger communicates with a drainage pipe. The cooling effect of the generator set is guaranteed, and through automatic control and resource recovery design, the regeneration effect of resin is optimized, and the service life of the resin is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of desalted water treatment devices, in particular to a closed-type circulation device for cooling desalted water of a thermal power unit. Background Art

[0002] The closed-loop desalinated cooling water system (referred to as closed cooling water) is an important component of a thermal power plant. It is mainly responsible for cooling the main and auxiliary equipment of the generator set. The closed cooling water system usually uses desalted water as the cooling medium to ensure water quality and avoid scaling and corrosion problems. This system usually includes a closed water pump, a cooler, a control cabinet, and related pipes and valves. The design and operation of the closed cooling water system is crucial to ensure the safe, stable and economical operation of the generator set.

[0003] At present, when treating desalted water, a pretreatment system is required to remove impurities and pollutants in the raw water to ensure the effect of subsequent treatment and the service life of the resin. At the same time, the ion exchange system uses ion exchange resin to remove soluble salts in the water, and further removes residual ions through a mixed bed to obtain high-quality pure water. However, when the system is working, if the resin in the ion exchange system becomes saturated, the treatment effect will be reduced. Therefore, a closed circulation device for cooling desalted water of a thermal power unit is needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a closed-type circulation device for cooling desalted water of a thermal power unit, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a closed-loop circulation device for cooling desalted water of a thermal power unit, comprising a base, a cation exchanger and an anion exchanger are fixedly installed on both sides of the front end of the upper end surface of the base, a water storage tank is arranged at the rear end of the upper end surface of the base, a water inlet end at the top of the back of the cation exchanger is connected and installed with a water guide pipe, a pump body is connected and installed at the rear end of the water guide pipe, and the pump body is connected and installed at the bottom of the water storage tank, a water outlet end of the cation exchanger is connected and installed with the water inlet end at the top of the back of the anion exchanger through a conduit, a second valve is arranged on the conduit, a hole is opened at the bottom of the front of the cation exchanger and connected and installed with a return liquid pipe; a hole is opened at the top of the anion exchanger and connected and installed with a liquid inlet pipe, a solution connecting pipe and a clean water connecting pipe are connected and installed on both sides of one end of the liquid inlet pipe away from the anion exchanger, a drain pipe is connected and installed on the water outlet end at the bottom of the back of the anion exchanger, and a sewage pipe is vertically connected and installed on the drain pipe.

[0006] Preferably, the water storage tank is fixedly mounted on the rear end of the upper end surface of the base by a mounting frame, holes are respectively opened on both sides of the top of the water storage tank and a water inlet pipe and a water replenishment pipe are installed in communication therewith, a liquid level gauge is installed in communication therewith on one side of the front of the water storage tank, an overflow pipe is installed in communication therewith on the upper side of the other side of the front of the water storage tank, and a waste discharge pipe is installed in communication therewith on the bottom of the other side of the front of the water storage tank.

[0007] In the design, the water storage tank is fixed to the rear end of the upper end surface of the base through a mounting frame. This design can ensure the stability of the water storage tank and facilitate maintenance. The water inlet pipe and water replenishment pipe are respectively arranged on both sides of the top of the water storage tank. This layout makes the water inlet and water replenishment operations more convenient. In addition, a liquid level gauge is installed on one side of the front of the water storage tank to facilitate real-time monitoring of the water level and ensure the safe operation of the system. The overflow pipe and waste pipe are respectively arranged on the top and bottom of the other side of the water storage tank. These designs help to automatically overflow when the water level is too high, and conveniently discharge waste liquid when necessary.

[0008] Preferably, a control cabinet is fixedly mounted on one side of the front of the mounting frame, and the control cabinet is electrically connected to the pump body.

[0009] In the design, the control cabinet is fixedly installed on the front side of the mounting frame and is electrically connected to the pump body. This design makes the control of the entire system more centralized and convenient. The operator can easily monitor and adjust the working status of the pump body at the control cabinet, which improves the automation of the system and the simplicity of operation.

[0010] Preferably, the end of the overflow pipe facing away from the water storage tank is connected to the waste pipe, and an eighth valve is provided on the waste pipe on the side of the overflow pipe opposite to the water storage tank.

[0011] In the design, the overflow pipe is not only connected to the waste pipe of the water storage tank, but also has an eighth valve on the waste pipe on the opposite side of the water storage tank. This design allows operators to control waste discharge as needed, improving the flexibility of the system and its adaptability to different working conditions.

[0012] Preferably, the water conduit is provided with a first valve, and the first valve is fixedly mounted at one end of the water conduit close to the cation exchanger.

[0013] In the design, the first valve on the water pipe is fixedly installed at one end close to the cation exchanger. This layout allows the operator to accurately control the water flow entering the cation exchanger, thereby optimizing the regeneration effect of the resin and extending its service life.

[0014] Preferably, the ends of the solution connecting pipe and the clean water connecting pipe facing away from the liquid inlet pipe are connected and installed with the acid-base solution delivery mechanism and the cleaning water delivery mechanism respectively, and the solution connecting pipe and the clean water connecting pipe are respectively provided with a fourth valve and a fifth valve.

[0015] In the design, the design of the solution connecting pipe and the clean water connecting pipe further improves the efficiency of the system. They are connected to the acid and alkali solution delivery mechanism and the cleaning water delivery mechanism respectively, and are respectively provided with a fourth valve and a fifth valve. This design allows the regeneration and cleaning processes to be controlled independently, improving the flexibility of operation and the operating efficiency of the system.

[0016] Preferably, one end of the liquid return pipe away from the cation exchanger is connected and installed with the acid-base solution recovery mechanism, and a third valve is provided on the liquid return pipe.

[0017] In the design, the design of the return pipe reflects the consideration of environmental protection and resource recovery. It is connected to the acid and alkali solution recovery mechanism and is equipped with a third valve, so that the acid and alkali solution used in the resin regeneration process can be recovered and reused, reducing the discharge of chemical waste liquid and reducing the impact on the environment.

[0018] Preferably, a seventh valve is provided on the sewage pipe, and a sixth valve is provided on the drainage pipe on the side of the sewage pipe away from the anion exchanger.

[0019] The seventh and sixth valves on the sewage and drainage pipes provide precise control for the sewage and drainage of the system. The setting of these valves allows operators to control the discharge time and amount of waste liquid according to actual needs, which helps to maintain the cleanliness and efficient operation of the system.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, soluble salts in water are effectively removed by the coordinated use of a cation exchanger and an anion exchanger. The cation exchanger removes cations in water, and the anion exchanger removes anions, and the synergistic effect of the two improves the desalination efficiency. When the resin is saturated, the resin is regenerated through an acid-base solution delivery mechanism and a cleaning water delivery mechanism. During the regeneration process, the regeneration effect of the resin is ensured by controlling the concentration, flow rate and time of the regeneration agent, thereby extending the service life of the resin. The design of the water storage tank makes the water inlet and water replenishment operations more convenient, and the water level is monitored in real time by a liquid level gauge to ensure the safe operation of the system. The overflow pipe and waste discharge pipe design of the water storage tank help to overflow automatically when the water level is too high, and to conveniently discharge waste liquid when necessary, thereby improving the flexibility of the system and its adaptability to different working conditions. The control cabinet is electrically connected to the pump body, making the control of the entire system more centralized and convenient. The operator can easily monitor and adjust the working state of the pump body at the control cabinet, thereby improving the automation of the system and the ease of operation. The return pipe is connected to the acid and alkali solution recovery mechanism, and is controlled by the third valve, so that the acid and alkali solution used in the resin regeneration process can be recovered and reused, reducing the discharge of chemical waste liquid and reducing the impact on the environment. The design of the first valve on the water pipe, the second valve on the conduit, and the fourth and fifth valves on the solution connecting pipe and the clean water connecting pipe provides precise control for the water flow control of the system, optimizes the regeneration effect of the resin and prolongs its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the water storage tank connection structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection structure of the anion exchanger and the cation exchanger of the present invention;

[0025] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0026] Figure 5 It is a system flow chart of the present invention.

[0027] In the figure: 1, base; 2, cation exchanger; 21, water pipe; 211, first valve; 22, conduit; 221, second valve; 3, anion exchanger; 31, liquid return pipe; 311, third valve; 32, liquid inlet pipe; 321, solution connecting pipe; 3211, fourth valve; 322, clean water connecting pipe; 3221, fifth valve; 33, drain pipe; 331, sixth valve; 34, sewage pipe; 341, seventh valve; 4, water storage tank; 41, water inlet pipe; 42, water supply pipe; 43, overflow pipe; 44, waste pipe; 441, eighth valve; 45, liquid level meter; 46, control cabinet; 47, pump body; 48, mounting frame. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] like Figures 1 to 5 As shown, an embodiment of the present invention is a closed-type circulation device for cooling demineralized water of a thermal power unit, comprising a base 1, a cation exchanger 2 and an anion exchanger 3 are fixedly installed on both sides of the front end of the upper end of the base 1, a water storage tank 4 is provided at the rear end of the upper end of the base 1, a water inlet end of the top of the back of the cation exchanger 2 is connected and installed with a water guide pipe 21, a pump body 47 is connected and installed at the rear end of the water guide pipe 21, and the pump body 47 is connected and installed at the bottom of the water storage tank 4, the water outlet end of the cation exchanger 2 is connected and installed with the water inlet end of the top of the back of the anion exchanger 3 through a conduit 22, a second valve 221 is provided on the conduit 22, a hole is opened at the bottom of the front of the cation exchanger 2 and connected and installed with a return pipe 31; a hole is opened at the top of the anion exchanger 3 and connected and installed with a liquid inlet pipe 32, a solution connecting pipe 321 and a clean water connecting pipe 322 are connected and installed on both sides of one end of the liquid inlet pipe 32 away from the anion exchanger 3, a drain pipe 33 is connected and installed on the water outlet end of the bottom of the back of the anion exchanger 3, and a sewage pipe 34 is vertically connected and installed on the drain pipe 33.

[0031] Specifically, by using the cation exchanger 2 and the anion exchanger 3 in combination, soluble salts in water can be effectively removed. The cation exchanger 2 removes cations in water, and the anion exchanger 3 removes anions, and the synergistic effect of the two improves the desalination efficiency. When the resin is saturated, the resin is regenerated by the acid-base solution delivery mechanism and the cleaning water delivery mechanism. During the regeneration process, the regeneration effect of the resin is ensured by controlling the concentration, flow rate and time of the regeneration agent, thereby extending the service life of the resin. The design of the water storage tank 44 makes the water inlet and water replenishment operations more convenient, and the water level is monitored in real time by the liquid level meter 45 to ensure the safe operation of the system. The overflow pipe 43 and the waste pipe 44 of the water storage tank 4 are designed to help overflow automatically when the water level is too high, and to conveniently discharge waste liquid when necessary, thereby improving the flexibility of the system and its adaptability to different working conditions. The control cabinet 46 is electrically connected to the pump body 47, making the control of the entire system more centralized and convenient. The operator can easily monitor and adjust the working state of the pump body 47 at the control cabinet 46, thereby improving the automation of the system and the ease of operation. The return pipe 31 is connected to the acid-base solution recovery mechanism and is controlled by the third valve 311, so that the acid-base solution used in the resin regeneration process can be recovered and reused, reducing the discharge of chemical waste liquid and reducing the impact on the environment. The design of the first valve 211 on the water pipe 21 and the second valve 221 on the conduit 22, as well as the fourth valve 3211 and the fifth valve 3221 on the solution connecting pipe 321 and the clean water connecting pipe 322, provides precise control for the water flow control of the system, optimizes the regeneration effect of the resin and prolongs its service life. Through these designs, the device not only improves the water quality of the desalted water and ensures the cooling effect of the generator set, but also improves the ease of operation and the environmental protection performance of the system through automatic control and resource recovery design.

[0032] Embodiment 2

[0033] In order to facilitate the accurate control of the liquid level in the water storage tank, Figure 1 , Figures 2 to 3 As shown, in this embodiment, the water storage tank 4 is fixedly installed on the rear end of the upper end surface of the base 1 by a mounting frame 48, holes are respectively opened on both sides of the top of the water storage tank 4 and connected and installed with a water inlet pipe 41 and a water replenishment pipe 42, a liquid level gauge 45 is connected and installed on one side of the front of the water storage tank 4, a hole is opened on the upper side of the other side of the front of the water storage tank 4 and connected and installed with an overflow pipe 43, and a hole is opened at the bottom of the other side of the front of the water storage tank 4 and connected and installed with a waste pipe 44.

[0034] In the design, the water storage tank 4 is fixed to the rear end of the upper end surface of the base 1 by a mounting frame 48. This design can ensure the stability of the water storage tank 4 and facilitate maintenance. A water inlet pipe 41 and a water replenishment pipe 42 are respectively provided on both sides of the top of the water storage tank 4. Such a layout makes the water inlet and replenishment operations more convenient. In addition, a liquid level gauge 45 is installed on one side of the front of the water storage tank 4 to facilitate real-time monitoring of the water level and ensure the safe operation of the system. An overflow pipe 43 and a waste pipe 44 are respectively provided on the top and bottom of the other side of the water storage tank 4. These designs help to automatically overflow when the water level is too high, and to conveniently discharge waste liquid when necessary.

[0035] Furthermore, a control cabinet 46 is fixedly mounted on one side of the front of the mounting frame 48 , and the control cabinet 46 is electrically connected to the pump body 47 .

[0036] In the design, the control cabinet 46 is fixedly mounted on the front side of the mounting frame 48 and is electrically connected to the pump body 47. This design makes the control of the entire system more centralized and convenient, and the operator can easily monitor and adjust the working state of the pump body 47 at the control cabinet 46, thereby improving the automation of the system and the simplicity of operation.

[0037] Furthermore, one end of the overflow pipe 43 away from the water storage tank 4 is connected and installed with the waste pipe 44 , and an eighth valve 441 is provided on the waste pipe 44 on the side opposite to the water storage tank 4 of the overflow pipe 43 .

[0038] In the design, the overflow pipe 43 is not only connected to the waste pipe 44 of the water storage tank 4, but also an eighth valve 441 is provided on the waste pipe 44 on the side opposite to the water storage tank 4. This design allows the operator to control the waste discharge as needed, thereby improving the flexibility of the system and its adaptability to different working conditions.

[0039] Embodiment 3

[0040] In order to control the amount of water entering the anion and cation exchanger when the equipment is in use, and to effectively clean and discharge the sewage after the resin is regenerated, such as Figure 1 and Figure 2 As shown, in this embodiment, a first valve 211 is provided on the water conduit 21 , and the first valve 211 is fixedly installed at one end of the water conduit 21 close to the cation exchanger 2 .

[0041] In the design, the first valve 211 on the water pipe 21 is fixedly installed at one end close to the cation exchanger 2. This layout allows the operator to accurately control the water flow entering the cation exchanger 2, thereby optimizing the regeneration effect of the resin and extending its service life.

[0042] Furthermore, the ends of the solution connecting pipe 321 and the clean water connecting pipe 322 facing away from the liquid inlet pipe 32 are connected to the acid-base solution delivery mechanism and the cleaning water delivery mechanism respectively, and the solution connecting pipe 321 and the clean water connecting pipe 322 are respectively provided with a fourth valve 3211 and a fifth valve 3221.

[0043] In the design, the design of the solution connecting pipe 321 and the clean water connecting pipe 322 further improves the efficiency of the system. They are connected to the acid-base solution delivery mechanism and the cleaning water delivery mechanism respectively, and are respectively provided with a fourth valve 3211 and a fifth valve 3221. This design allows the regeneration and cleaning processes to be independently controlled, improving the flexibility of operation and the operating efficiency of the system.

[0044] Furthermore, one end of the liquid return pipe 31 away from the cation exchanger 2 is connected to the acid-base solution recovery mechanism, and a third valve 311 is provided on the liquid return pipe 31 .

[0045] In the design, the design of the liquid return pipe 31 reflects the consideration of environmental protection and resource recovery. It is connected to the acid and alkali solution recovery mechanism and is provided with a third valve 311, so that the acid and alkali solution used in the resin regeneration process can be recovered and reused, reducing the discharge of chemical waste liquid and reducing the impact on the environment.

[0046] Furthermore, a seventh valve 341 is provided on the sewage pipe 34 , and a sixth valve 331 is provided on the drainage pipe 33 at the side of the sewage pipe 34 away from the anion exchanger 3 .

[0047] In the design, the design of the seventh valve 341 and the sixth valve 331 on the sewage pipe 34 and the drainage pipe 33 provides precise control for the sewage and drainage of the system. The setting of these valves allows the operator to control the discharge time and amount of waste liquid according to actual needs, which helps to maintain the cleanliness and efficient operation of the system.

[0048] When the present invention is used, raw water is introduced into the pretreatment system, and impurities such as suspended matter, colloids, and organic matter in the water are removed by filtering, adsorption, and other methods, and it is ensured that the pretreated water quality meets the water inlet requirements of the ion exchanger. The pretreated water is injected into the water storage tank 4, and the first valve 211 is opened to allow the pretreated water to be pressurized by the pump body 47 and flow into the cation exchanger 2 through the water conduit 21. The resin in the cation exchanger 2 absorbs cations in the water, and the treated water flows into the anion exchanger 3 through the conduit 22. The second valve 221 on the conduit 22 is kept open to ensure smooth water flow. The resin in the anion exchanger 3 absorbs anions in the water to further purify the water quality. The water treated by the ion exchanger is discharged through the drain pipe 33, and if necessary, it needs to be treated by a mixed bed to remove residual ions.

[0049] When the resin is saturated, it needs to be regenerated. At this time, the first valve 211, the fifth valve 3221, the sixth valve 331 and the seventh valve 341 are closed, and the third valve 311 and the fourth valve 3211 are opened to allow the high-concentration acid or alkali solution to flow into the liquid inlet pipe 32 through the solution connecting pipe 321, and then the solution is allowed to enter the cation exchanger 2 and the anion exchanger 3 through the conduit 22, so as to regenerate the resin. During the regeneration process, the regeneration effect of the resin is ensured by controlling the concentration, flow rate and time of the regenerant. After the regeneration is completed, the third valve 311 and the fourth valve 3211 are closed, and the fifth valve 3221 and the seventh valve 341 are opened, so that flushing water is introduced through the clean water connecting pipe 322 to flush the resin to remove the residual regenerant and impurities, and the waste liquid that cannot be recovered is discharged through the sewage pipe 34. When the equipment is running, the water level in the water storage tank 4 is monitored by the liquid level meter 45 to ensure the normal operation of the system. The eighth valve 441 on the sewage pipe 44 is opened as needed to prepare for the waste discharge needs during the operation of the system.

Claims

1. A closed-loop desalted water cooling device for a thermal power unit, comprising a base (1), a cation exchanger (2) and an anion exchanger (3) being fixedly mounted on both sides of the front end of the upper end surface of the base (1), and a water storage tank (4) being disposed at the rear end of the upper end surface of the base (1), characterized in that: The water inlet end at the top of the back side of the cation exchanger (2) is connected and installed with a water guide pipe (21), the rear end of the water guide pipe (21) is connected and installed with a pump body (47), the pump body (47) is connected and installed at the bottom of the water storage tank (4), the water outlet end of the cation exchanger (2) is connected and installed with the water inlet end at the top of the back side of the anion exchanger (3) through a conduit (22), the conduit (22) is provided with a second valve (221), the bottom of the front side of the cation exchanger (2) is opened and connected and installed with a liquid return pipe (31); The anion exchanger (3) has an opening at the top and is connected to a liquid inlet pipe (32). The liquid inlet pipe (32) is connected to a solution connecting pipe (321) and a clean water connecting pipe (322) on both sides of one end away from the anion exchanger (3). A drainage pipe (33) is connected to the water outlet at the bottom of the back of the anion exchanger (3). A sewage pipe (34) is vertically connected to the drainage pipe (33).

2. A closed-cycle desalted water cooling device for thermal power units according to claim 1, characterized in that: The water storage tank (4) is fixedly mounted on the rear end of the upper end surface of the base (1) via a mounting frame (48); holes are respectively opened on both sides of the top of the water storage tank (4) and connected with a water inlet pipe (41) and a water supply pipe (42); a liquid level gauge (45) is connected and installed on one side of the front of the water storage tank (4); a hole is opened on the top of the other side of the front of the water storage tank (4) and connected with an overflow pipe (43); and a hole is opened on the bottom of the other side of the front of the water storage tank (4) and connected with a waste pipe (44).

3. A closed-type circulation device for cooling desalted water of a thermal power unit according to claim 2, characterized in that: A control cabinet (46) is fixedly mounted on one side of the front of the mounting frame (48), and the control cabinet (46) is electrically connected to the pump body (47).

4. A closed-type circulation device for cooling desalted water of a thermal power unit according to claim 2, characterized in that: The end of the overflow pipe (43) facing away from the water storage tank (4) is connected to the waste pipe (44) and an eighth valve (441) is provided on the waste pipe (44) on the side of the overflow pipe (43) opposite to the water storage tank (4).

5. A closed-cycle desalted water cooling device for thermal power units according to claim 1, characterized in that: The water conduit (21) is provided with a first valve (211), and the first valve (211) is fixedly mounted on one end of the water conduit (21) close to the cation exchanger (2).

6. A closed-type circulation device for cooling demineralized water of a thermal power unit according to claim 1, characterized in that: The ends of the solution connecting pipe (321) and the clean water connecting pipe (322) facing away from the liquid inlet pipe (32) are connected to the acid-base solution delivery mechanism and the cleaning water delivery mechanism respectively, and the solution connecting pipe (321) and the clean water connecting pipe (322) are respectively provided with a fourth valve (3211) and a fifth valve (3221).

7. A closed-type circulation device for cooling demineralized water of a thermal power unit according to claim 1, characterized in that: The end of the liquid return pipe (31) away from the cation exchanger (2) is connected to the acid-base solution recovery mechanism, and a third valve (311) is provided on the liquid return pipe (31).

8. A closed-type circulation device for cooling demineralized water of a thermal power unit according to claim 1, characterized in that: The sewage pipe (34) is provided with a seventh valve (341), and the drainage pipe (33) on the side of the sewage pipe (34) away from the anion exchanger (3) is provided with a sixth valve (331).

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