Water purification equipment for water circulation system and water circulation system

Abstract

The utility model relates to the field of industrial water purification, in particular to water purification equipment for a water circulation system and the water circulation system. The water purification equipment comprises a water circulation module and a heat recovery module. The water circulation module comprises a circulation water tank (1) and an evaporation water tank (7) connected with the circulation water tank (1) through a water conveying pipe (11). The heat recovery module comprises an evaporator (4) arranged in the circulation water tank, a condenser (9) arranged in the evaporation water tank and a compressor (6) connected with the evaporator and the condenser. Circulating water with waste heat firstly enters the circulating water tank and is in contact with the evaporator in the circulating water tank, the waste heat in the circulating water is absorbed by the evaporator, and part of the circulating water then flows into the evaporation water tank and is heated and evaporated by the condenser in the evaporation water tank, so that distilled purified water is obtained. The waste heat in the industrial circulating water body can be efficiently utilized through the heat recovery module, and the waste heat is directly utilized in the water body purification equipment to purify the water body, so that the energy cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of industrial water purification, in particular to a water purification equipment for water circulation system. On this basis, the utility model further relates to a water circulation system using the water purification equipment. BACKGROUND

[0002] Due to the increasing severity of water resource shortage and environmental problems, industrial water treatment has gradually become an important link in industrial production. By using water circulation purification equipment, industrial enterprises can effectively reduce the dependence on fresh water resources, reduce water resource waste, and realize closed-loop utilization of circulating water. This not only helps to save water resources, but also helps to reduce pollution of surrounding water bodies caused by industrial production, thereby saving environmental costs of industrial production. In the prior art, the impurities and various metal salt ions in the closed-loop water circulation system will gradually clog the pipeline during long-term use. At the same time, for difficult industrial wastewater, using traditional adsorption method, catalytic electrolysis method and other sewage treatment methods will greatly increase the operation cost of the process, and the waste heat resources in the industrial wastewater cannot be recycled.

[0003] Chinese utility model patent CN 217350870 U discloses a circulating water purification device, wherein the flocculating agent is used to mix with the circulating water to be treated, so as to flocculate and settle the impurities in the water body, and a heat exchanger is arranged to absorb the waste heat in the circulating water. However, the flocculation and settlement using the flocculating agent in the utility model requires a large-scale equipment to realize, and cannot treat the metal salt ions dissolved in water. At the same time, only the heat exchanger is arranged, and the waste heat is not directly utilized. The heat loss in each link of heat conduction will lead to poor waste heat utilization efficiency.

[0004] Therefore, a water purification equipment capable of treating the metal salt ions dissolved in water and efficiently and completely utilizing the heat energy in the circulating water body is needed. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problem of how to efficiently utilize the heat energy in the industrial circulating water body and purify the metal salt ions dissolved in the circulating water.

[0006] In order to achieve the above-mentioned purpose, in the first aspect, the utility model provides a water purification equipment for water circulation system, which comprises a water circulation module and a heat recovery module. The water circulation module comprises a circulating water tank and an evaporation water tank, wherein the circulating water tank is connected with the evaporation water tank through a water conveying pipe, and the position of the water conveying pipe connected with the circulating water tank is located at the bottom of the circulating water tank. The heat recovery module comprises an evaporator arranged in the circulating water tank, a condenser arranged in the evaporation water tank, and a compressor connecting the evaporator and the condenser.

[0007] Preferably, the circulating water tank also includes an inlet disposed on one side wall and an outlet disposed on the other side wall opposite to the inlet.

[0008] Preferably, a filter element is fixedly installed inside the circulating water tank, which divides the inner cavity of the circulating water tank into upper and lower spaces.

[0009] Preferably, the inlet is below the filter element and the outlet is above the filter element.

[0010] Preferably, the evaporators are evenly distributed above and below the filter elements.

[0011] Preferably, the evaporation tank further includes a cooling spire disposed on its top and a water collection tray disposed below the cooling spire.

[0012] Preferably, the water collection tray is connected to the circulating water tank via a return water pipe connected to its bottom.

[0013] Preferably, the circulating water tank and the evaporation water tank are also equipped with inspection ports.

[0014] Preferably, the evaporation tank also includes an emergency pressure relief port located on its top casing.

[0015] Secondly, this utility model also provides a water circulation system, which includes the water purification equipment for the water circulation system described above.

[0016] The heat recovery module in the above technical solution can efficiently utilize the waste heat in industrial circulating water and directly use this waste heat in the water purification equipment of this utility model to help purify the water, thus avoiding the waste of waste heat during the transmission process. When the circulating water with waste heat enters the water purification equipment, it first enters the circulating water tank with an evaporator inside. The refrigerant in the evaporator absorbs the heat in the circulating water and evaporates, then enters the compressor for further pressurization, and is then sent to the condenser. Part of the circulating water flows from the circulating water tank into the evaporation water tank through the water supply pipe and comes into contact with the condenser in the evaporation water tank. The refrigerant in the condenser solidifies upon contact with the condenser and releases heat, releasing the waste heat collected from the entire circulating water body and the heat converted from the work done by the compressor into the circulating water in the evaporation water tank. This heats and evaporates the circulating water containing dissolved metal salt ions, thereby obtaining distilled water free of metal salt ions after distillation and purification. The technical solution of this application uses a heat recovery module to recover all the waste heat in the circulating water and use it to heat part of the circulating water entering the evaporation tank. The compressor in the heat recovery module can not only recover the waste heat in the circulating water, but also provide heat for the distillation purification process of the evaporation circulating water in the evaporation tank. In addition, the purification equipment of this application uses distillation purification, which can distill the circulating water containing dissolved metal salt ions into pure water, avoiding the problem of metal salt ions precipitating and depositing in the water pipeline and causing blockage. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 is the overall structure schematic diagram of one embodiment of the present application.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1, circulating water tank; 2, filter; 3, water inlet; 4, evaporator; 5, water outlet; 6, compressor; 7, return pipe; 8, evaporative water tank; 9, condenser; 10, water collecting tray; 11, water delivery pipe; 12, cooling sharp top; 13, access hole; 14, emergency pressure relief port. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be further described in detail below in combination with the drawings and examples. The detailed description of the following examples and drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, and the present application can be implemented in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0022] It should be noted that in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Techniques, methods, and equipment known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and equipment should be considered as part of the specification.

[0024] The purpose of the present application is to solve the problem of how to efficiently utilize the heat energy in the industrial circulating water body and purify the dissolved metal salt ions in the circulating water.

[0025] To achieve the above purpose, in a first aspect, as Figure 1The utility model provides a water body purification equipment for water circulation system, including water circulation module and heat recovery module. Water circulation module includes circulating water tank 1 and evaporative water tank 8, wherein circulating water tank 1 is connected with evaporative water tank 8 through water delivery pipe 11, and the position of water delivery pipe 11 connected with circulating water tank 1 is located at the bottom of circulating water tank 1. Heat recovery module includes evaporator 4 arranged in circulating water tank 1, condenser 9 arranged in evaporative water tank 8 and compressor 6 connecting evaporator 4 and condenser 9.

[0026] Through the heat recovery module in the technical scheme, the waste heat in the industrial circulating water body can be efficiently utilized, and the waste heat is directly used in the water body purification equipment to help water purification, so that the waste of waste heat in the transmission process is avoided. When the circulating water with waste heat enters the water body purification equipment, it first enters the circulating water tank 1 provided with the evaporator 4, the refrigerant in the evaporator 4 absorbs the heat in the circulating water and evaporates, and is further pressurized in the compressor 6 and then delivered into the condenser 9. Part of the circulating water flows from the circulating water tank 1 into the evaporative water tank 8 through the water delivery pipe 11 and contacts the condenser 9 in the evaporative water tank 8, the refrigerant in the condenser 9 is condensed and releases heat, and the waste heat collected from the entire circulating water body and the heat converted by the compressor 6 are released into the circulating water in the evaporative water tank 8, so that the circulating water containing metal salt ions is heated and evaporated, thereby obtaining distilled water containing no metal salt ions after distillation purification. In the technical scheme of the present application, the heat recovery module is used to recover the waste heat in all circulating water for heating part of the circulating water entering the evaporative water tank 8, the compressor 6 in the heat recovery module not only recovers the waste heat in the circulating water, but also provides heat for the distillation and purification process of the evaporative circulating water in the evaporative water tank 8, and the purification equipment uses the distillation and purification method to distill the circulating water containing metal salt ions into pure water, avoiding the problem of blockage caused by the precipitation of metal salt ions in the water pipeline.

[0027] The heat transferred from the circulating water tank 1 to the evaporative water tank 8 by the heat recovery module includes not only the heat absorbed by the circulating water in the circulating water tank 1, but also the energy transferred by the compressor 6 when compressing the refrigerant. By setting the compressor, the heat recovery module can not only utilize the waste heat in the circulating water, but also adjust the heat released by the condenser in the evaporative water tank by adjusting the power of the compressor, thereby adjusting the distillation and purification speed in the evaporative water tank.

[0028] Preferably, the evaporator 4 and the condenser 9 can be shell and tube heat exchangers made of titanium alloy. By choosing titanium alloy, the anti-corrosion requirement in the industrial circulating water treatment can be met, and the evaporator 4 and the condenser 9 can be prevented from being corroded by the corrosive industrial wastewater. Moreover, the titanium alloy has excellent heat exchange performance, which can improve the working efficiency of the evaporator 4 and the condenser 9, thereby improving the working efficiency of the water body purification device.

[0029] Preferably, the compressor 6 can be a heat pump compressor. In the industrial water circulation system, the temperature of the circulating water entering the water body purification device is relatively stable. By using a heat pump compressor for a specific temperature range, the efficiency of the compressor can be improved, thereby improving the utilization rate of the waste heat of the circulating water. At the same time, the compressor 6 can be ensured to operate stably under the working condition of long-time operation, thereby ensuring that the water body purification device can operate stably for a long time.

[0030] Preferably, as shown in Figure 1 the circulating water tank 1 further comprises a water inlet 3 arranged on one side wall thereof and a water outlet 5 arranged on the other side wall opposite to the water inlet 3. The industrial wastewater enters the water circulation system through the water inlet 3 and is discharged through the water outlet 5 after being purified. By arranging the water inlet 3 and the water outlet 5 oppositely, the water circulation module can ensure that the circulating water can circulate in the water circulation module.

[0031] Preferably, a filter 2 is fixedly arranged in the circulating water tank 1, which divides the inner cavity of the circulating water tank 1 into two spaces. By the filter 2, the circulating water entering the circulating water tank 1 through the water inlet 3 can be filtered, so as to filter out the solid impurities therein for further purification treatment.

[0032] Preferably, as shown in Figure 1 the filter 2 can be a module composed of multiple nanofiltration membranes. By the filter 2 composed of semi-permeable membranes, the metal ion salts in the circulating water can be filtered at the same time when the solid impurities in the circulating water are filtered, so as to purify the circulating water and make the content of the metal ion salts reach the standard required by industrial production.

[0033] Preferably, the water inlet 3 is below the filter 2, and the water outlet 5 is above the filter 2. When the circulating water enters the circulating water tank 1 through the water inlet 3, the circulating water is first contained in the space below the filter 2. When the circulating water fills the space below the filter 2, the circulating water flows to the space above the filter 2 through the filter 2. The circulating water passing through the filter 2 can be discharged from the circulating water tank 1 through the water outlet 5 arranged above the filter 2. By arranging the water inlet 3 and the water outlet 5 respectively, it can be ensured that the circulating water entering the circulating water tank 1 can only be discharged through the water outlet 5 after being filtered by the filter 2, thereby avoiding the unfiltered circulating water being directly discharged from the water body purification device.

[0034] Preferred, such as Figure 1 As shown, the evaporators 4 are evenly distributed above and below the filter element 2. When the circulating water flows in the circulating water tank 1, it is in contact with the evaporators 4 throughout its entire journey, thus increasing the contact time between the evaporators 4 and the circulating water. The evaporators 4, distributed above and below the filter element 2, help the condenser 4 absorb more heat from the circulating water by increasing the contact time between the circulating water and the condenser 4, thereby making more complete use of the waste heat resources in the circulating water and avoiding waste of these resources.

[0035] When this water purification equipment is working, a portion of the circulating water in the circulating water tank 1 is purified and discharged by the filter element 2 using a semi-permeable membrane, while the remaining circulating water enters the evaporation tank 8 for evaporation. However, all the waste heat from the circulating water is utilized within the circulating water tank 1. This setup maximizes the utilization of waste heat in the circulating water by using all the waste heat in the circulating water for the distillation purification process in the evaporation tank 8. Simultaneously, the semi-permeable membrane filter element 2 purifies the circulating water without consuming energy, saving on the operating costs of this water purification equipment.

[0036] Preferred, such as Figure 1 As shown, the evaporation tank 8 also includes a cooling peak 12 at its top and a water collection tray 10 below the cooling peak 12. When this water purification equipment is working, the circulating water in the circulating water tank 1 that meets the standards after being filtered by the filter element 2 is discharged through the outlet. The unfiltered circulating water enters the evaporation tank 8 through the water supply pipe 11 at the bottom of the circulating water tank 1, and is heated and evaporated by the condenser 9 in the evaporation tank 8. The steam generated by evaporation rises to the cooling peak 12, collects at the tip of the cooling peak 12 and is cooled, condensing into liquid water that falls into the water collection tray 10 below the cooling peak 12. Through the cooling peak 12 and the water collection tray 10, the water vapor generated by the heat exchange module utilizing waste heat in the evaporation tank 8 can be condensed into pure water and collected, thereby completing the purification of the circulating water.

[0037] Preferred, such as Figure 1 As shown, the water collection tray 10 is connected to the circulating water tank 1 via a return water pipe 7 connected to its bottom. When the water purification equipment is working, and condensed purified water is collected in the water collection tray 10, the purified water in the water collection tray 10 can enter the circulating water tank 1 through the return water pipe 7 and be discharged from the circulating water tank through the outlet 5. Through the return water pipe 7, the purified water can be discharged from the water purification equipment, allowing the purified water to continue to participate in the industrial water circulation.

[0038] Preferred, such as Figure 1As shown, the circulating water tank 1 and the evaporation water tank 8 are also respectively provided with an inspection opening 13. When the water purification equipment fails or a certain amount of solute is precipitated from the water in the evaporation water tank 8 due to too high concentration, the equipment can be shut down and the inspection opening 13 is opened, the water in the circulating water tank 1 and the evaporation water tank 8 is all pumped out, and then corresponding maintenance or repair work is manually performed. By providing the inspection opening 13, the maintenance and repair of the equipment can be conveniently performed manually, and the precipitated circulating water solute in the evaporation water tank 8 can be cleaned when necessary, so that the equipment can be stably operated for a long time.

[0039] Preferably, as shown in the drawings, Figure 1 As shown, the evaporation water tank 8 also includes an emergency pressure relief opening 14 provided on the top of the tank. The distillation method is used to purify the circulating water in the evaporation water tank 8. When the equipment fails and the pressure in the evaporation water tank 8 is too high and exceeds the safe operating range, the emergency pressure relief opening 14 can be opened to release the pressure in the evaporation water tank 8, so as to prevent production safety problems and even equipment scrapping.

[0040] In a second aspect, the utility model also provides a water circulation system, which comprises the above-mentioned water purification equipment for a water circulation system. By using the above-mentioned water purification equipment, the water circulation system can purify impurities in the circulating water and greatly reduce the energy consumed for purifying the circulating water, thereby saving the operation cost of the water circulation system.

[0041] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with a preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the above-mentioned disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes do not deviate from the technical solution of the utility model. Any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the utility model are still within the scope of the technical solution of the utility model.

[0042] It should be noted that the structures, proportions, sizes and the like shown in the drawings of the present specification are only used to cooperate with the disclosed content, so that persons skilled in the art can understand and read, and do not limit the implementation conditions of the utility model. Therefore, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose of the utility model, should still be within the scope of the disclosed technical content of the utility model.

Claims

1. A water body purification apparatus for a water circulation system, characterized by, The application relates to a water circulation system, which comprises: a water circulation module, which comprises a circulating water tank (1) and an evaporative water tank (8), wherein the circulating water tank (1) is connected with the evaporative water tank (8) through a water delivery pipe (11) connected with the bottom of the circulating water tank (1); and a heat recovery module, which comprises an evaporator (4) arranged in the circulating water tank (1), a condenser (9) arranged in the evaporative water tank (8) and a compressor (6) connecting the evaporator (4) and the condenser (9).

2. The water body purification apparatus for a water circulation system according to claim 1, characterized by, The circulating water tank (1) further comprises a water inlet (3) arranged on one side wall thereof and a water outlet (5) arranged on the other side wall opposite to the water inlet (3).

3. The water body purification apparatus for a water circulation system according to claim 2, characterized by, The circulating water tank (1) is fixedly provided with a filter (2) in the inner cavity, which divides the inner cavity of the circulating water tank (1) into two spaces.

4. The water body purification apparatus for a water circulation system according to claim 3, characterized by, The water inlet (3) is below the filter (2), and the water outlet (5) is above the filter (2).

5. The water body purification apparatus for a water circulation system according to claim 3, characterized by, The evaporators (4) are uniformly distributed above and below the filter (2).

6. The water body purification apparatus for a water circulation system according to claim 1, wherein The evaporative water tank (8) further comprises a cooling pointed top (12) arranged on the top thereof and a water collecting disc (10) arranged below the cooling pointed top (12).

7. The water body purification apparatus for a water circulation system according to claim 6, characterized by, The water collecting disc (10) is connected with the circulating water tank (1) through a water return pipe (7) connected with the bottom of the water collecting disc (10).

8. The water body purification apparatus for a water circulation system according to claim 1, wherein The circulating water tank (1) and the evaporative water tank (8) are further respectively provided with an inspection opening (13).

9. The water body purification apparatus for a water circulation system according to claim 1, wherein The evaporative water tank (8) further comprises an emergency pressure relief opening (14) arranged on the top tank body thereof.

10. A water circulation system characterized by, The application further relates to a water body purification device for a water circulation system. The application further relates to a water body purification device for a water circulation system.

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