Device for recycling waste heat of device and discharging water outwards

Abstract

The utility model discloses a device utilizing device waste heat to recover external drainage, and relates to the technical field of industrial drainage, the device comprises a water recovery assembly and a deslagging assembly, three flash evaporation concentration assemblies are arranged between the water recovery assembly and the deslagging assembly, the water recovery assembly comprises a pure water tank, a first heat exchanger and a second heat exchanger, a pure water connector is formed in one side of the pure water tank, a first input end of the first heat exchanger is provided with an outer drainage connector, a second input end of the first heat exchanger is communicated with a flash evaporation condensate pipe, a first output end of the first heat exchanger is communicated with a first communicating pipe, and a second input end of the second heat exchanger is provided with a steam connector. The first output end of the second heat exchanger is communicated with a concentration pipe; the waste heat recovery device can fully utilize waste heat of a production device to recover moisture of discharged water, achieves the effects of improving the energy utilization rate and reducing heat loss, and has high practical value.

Description

A waste heat recovery and external drainage device Technical Field

[0001] This utility model relates to the field of industrial drainage technology, specifically to an external drainage device that utilizes waste heat recovery. Background Technology

[0002] Industrial wastewater refers to the discharge of wastewater generated during industrial production processes. This wastewater may contain various pollutants from manufacturing, processing, cleaning, cooling, and other processes. A key characteristic of industrial wastewater is its complex and variable composition, which depends on the type of industry and its production processes.

[0003] Based on the above, the inventors have discovered the following problems: In current industrial production, a large amount of wastewater is discharged, the water utilization rate is low, a large amount of raw water needs to be added to the production, and the waste heat of the main production equipment cannot be effectively utilized, resulting in a large amount of heat loss.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an external drainage device that utilizes waste heat recovery, in order to achieve a more practical purpose. Summary of the Invention

[0005] The purpose of this invention is to provide a waste heat recovery and external drainage device to solve the problems mentioned in the background art.

[0006] An external drainage device for waste heat recovery from an apparatus includes a water recovery component and a slag discharge component. Three flash evaporation and concentration components are located between the water recovery component and the slag discharge component. Each water recovery component includes a pure water tank, a first heat exchanger, and a second heat exchanger. A pure water inlet is provided on one side of the pure water tank. An external drainage inlet is provided at the first input end of the first heat exchanger. A flash condensate pipe is connected to the second input end of the first heat exchanger. The second output end of the first heat exchanger is connected to the pure water tank, and a first connecting pipe is connected to the first output end of the first heat exchanger. The other end of the first connecting pipe is connected to the first input end of the second heat exchanger. A steam inlet is provided at the second input end of the second heat exchanger. A concentration pipe is connected to the first output end of the second heat exchanger, and the second output end of the second heat exchanger is connected to the pure water tank.

[0007] By adopting the above technical solution, three flash concentration components are installed between the water recovery component and the slag discharge component. This facilitates the flash concentration of the external drainage by the three flash concentration components, making it easy to recover the water in the external drainage. A pure water interface is opened on one side of the pure water tank, which facilitates the collection of pure water recovered during the operation of the device. The pure water interface is connected to an external pipeline for easy use of the recovered pure water. The setting of the first heat exchanger facilitates the connection between the external drainage interface and the external pipeline, allowing the external drainage to enter the first heat exchanger and exchange heat with the flash condensate generated during the operation of the flash concentration components. The flash condensate is preheated before being discharged into the pure water tank for collection. The other end of the first connecting pipe is connected to the first input end of the second heat exchanger, facilitating the flow of the preheated external drainage into the second heat exchanger. The setting of the second heat exchanger facilitates the connection of the steam interface to the external pipeline, allowing the waste heat steam of the production device to enter the second heat exchanger to heat the external drainage. The heated external drainage is then fed into the flash concentration component from the inside of the concentration pipe for concentration and recovery. The condensate generated after steam heat exchange is discharged into the pure water tank for collection.

[0008] Furthermore, the flash concentration assembly includes a flash tank and a third heat exchanger. A liquid inlet is provided at the bottom of one side of the flash tank. The liquid inlet of the flash tank near the water recovery assembly is connected to one end of the concentration tube. A seed interface is provided at the top of one side of the flash tank.

[0009] By adopting the above technical solution, the liquid inlet of the flash tank near the water recovery component is connected to one end of the concentration pipe, and a seed interface is opened on the top side of the flash tank to facilitate the external drainage after heating to enter the flash tank for flash concentration. The seed interface facilitates the entry of calcium carbonate powder into the flash concentration component, which helps to prevent scaling.

[0010] Furthermore, a discharge pump and a vacuum pump are provided on one side of the third heat exchanger. The input end of the discharge pump is connected to the bottom end of the flash tank, and the output end of the discharge pump is connected to the first input end of the third heat exchanger.

[0011] By adopting the above technical solution, the discharge pump facilitates the pumping of the concentrated liquid after flash evaporation inside the flash tank into the third heat exchanger for heat exchange.

[0012] Furthermore, the vacuum pump input is connected to the top of the flash tank, and the vacuum pump output is connected to the second input of the third heat exchanger.

[0013] By adopting the above technical solution, the vacuum pump can be set up to draw the flash tank into a vacuum and pump the flash steam generated by the flash tank into the third heat exchanger for heat exchange.

[0014] Furthermore, the first output end of the third heat exchanger is provided with a concentrate interface, which is connected to the liquid inlet interface of the adjacent flash tank.

[0015] By adopting the above technical solution, the concentrated liquid interface is connected to the liquid inlet interface of the adjacent flash tank, which facilitates the interconnection of the three flash concentration components. The concentrated liquid heated by the flash steam is then fed into the adjacent flash tank for further flash concentration.

[0016] Furthermore, the second output end of the third heat exchanger is provided with a flash condensate interface, which is connected to the flash condensate pipe.

[0017] By adopting the above technical solution, the flash condensate is connected to the flash condensate pipe through the flash condensate interface, which facilitates the flash condensate generated by the flash concentration component to be introduced into the first heat exchanger for preheating of the external drainage.

[0018] Furthermore, the slag discharge assembly includes a powder tank, the input end of which is connected to a second connecting pipe, and the other end of the second connecting pipe is connected to the concentrate interface of an adjacent third heat exchanger.

[0019] By adopting the above technical solution, the other end of the second connecting pipe is connected to the concentrated liquid interface of the adjacent third heat exchanger, which facilitates the introduction of the concentrated liquid after being concentrated by the three flash evaporation concentration components into the powder tank.

[0020] Furthermore, the powder tank is equipped with a stirrer inside, a slag discharge port is opened at the bottom of the powder tank, and a recycling tank is connected to one side of the powder tank.

[0021] By adopting the above technical solution, the agitator facilitates the stirring of the powder tank, suspending the calcium carbonate powder inside the concentrate. Calcium carbonate with attached sparingly soluble salts is discharged from the slag discharge port, while calcium carbonate without attached sparingly soluble salts overflows into the recovery tank with the concentrate.

[0022] Furthermore, a clear liquid interface is provided at the top of one side of the recycling tank, and a reflux pump is provided at the bottom of the recycling tank, with the input end of the reflux pump connected to the bottom of one side of the recycling tank.

[0023] By adopting the above technical solution, the setting of the clear liquid interface and the return pump facilitates the sedimentation of the concentrated solution mixed with calcium carbonate inside the recovery tank, and the supernatant is discharged as waste liquid from the clear liquid interface.

[0024] Furthermore, the output end of the reflux pump is connected to a reflux pipe, one end of which is connected to the seed interface, and a dispensing interface is provided at the top of one end of the reflux pipe.

[0025] By adopting the above technical solution, one end of the reflux pipe is connected to the seed interface, and a dosing interface is opened at the top of one end of the reflux pipe, which facilitates the reflux pump to pump the precipitated calcium carbonate to the flash tank near the water recovery component for recycling. The dosing interface is connected to the external pipeline, which facilitates the replenishment of calcium carbonate to the device.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: Three flash concentration components are provided between the water recovery component and the slag discharge component, facilitating flash concentration of the external drainage and convenient water recovery. A pure water interface is provided on one side of the pure water tank, allowing for the collection of pure water recovered during device operation. This pure water interface connects to an external pipeline for convenient use of the recovered pure water. The first heat exchanger facilitates connection between the external drainage interface and the external pipeline, allowing the external drainage to exchange heat with the flash condensate generated by the flash concentration components. The flash condensate preheats the external drainage before being discharged into the pure water system. The wastewater is collected in a tank and connected to the first input end of the second heat exchanger through the other end of the first connecting pipe. This facilitates the flow of preheated wastewater into the second heat exchanger. The second heat exchanger is designed to allow the steam interface to connect to external pipes, enabling the waste heat steam from the production unit to be fed into the second heat exchanger to heat the wastewater. The heated wastewater is then fed into the flash concentration module through the concentration pipe for concentration and recovery. The condensate generated after steam heat exchange is discharged into a pure water tank for collection. This invention can fully utilize the waste heat of the production unit to recover the water content of the wastewater, thereby improving energy utilization and reducing heat loss. It has high practical value. Attached Figure Description

[0027] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0028] Figure 1 is a three-dimensional structural schematic diagram of an external drainage device for waste heat recovery of the present invention.

[0029] Figure 2 is a three-dimensional structural diagram of the water recycling component of this utility model;

[0030] Figure 3 is a three-dimensional structural diagram of the flash evaporation component of this utility model;

[0031] Figure 4 is a three-dimensional structural diagram of the slag discharge component of this utility model.

[0032] In the diagram: 101, Water recovery assembly; 10101, Pure water tank; 10102, First heat exchanger; 10103, Second heat exchanger; 10104, Pure water inlet; 10105, External drain inlet; 10106, Flash condensate pipe; 10107, Steam inlet; 10108, First connecting pipe; 10109, Concentration pipe; 102, Flash concentration assembly; 10201, Flash tank; 10202, Liquid inlet inlet; 10203, Drain... Pump outlet; 10204, vacuum pump; 10205, third heat exchanger; 10206, concentrate interface; 10207, flash condensate interface; 10208, seed crystal interface; 103, slag discharge assembly; 10301, powder tank; 10302, second connecting pipe; 10303, slag discharge interface; 10304, recovery tank; 10305, reflux pump; 10306, clear liquid interface; 10307, ​​reflux pipe; 10308, dosing interface. Detailed Implementation

[0033] 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.

[0034] Please refer to Figures 1-4. This utility model provides a technical solution: a waste heat recovery device for external drainage, including a water recovery component 101 and a slag discharge component 103. Three flash concentration components 102 are arranged between the water recovery component 101 and the slag discharge component 103. The arrangement of these three flash concentration components 102 between the water recovery component 101 and the slag discharge component 103 facilitates flash concentration of the external drainage, enabling convenient recovery of the water content. The water recovery component 101 includes a pure water tank 10101, a first heat exchanger 10102, and a second heat exchanger 10103. The pure water tank 10101... A pure water inlet 10104 is provided on one side of the device, which is connected to the pure water tank 10101. This facilitates the collection of pure water recovered during the operation of the device by the pure water tank 10101. The pure water inlet 10104 is connected to an external pipeline for convenient use of the recovered pure water. The first heat exchanger 10102 has an external drain inlet 10105 at its first input end. The second input end of the first heat exchanger 10102 is connected to a flash condensate pipe 10106. The second output end of the first heat exchanger 10102 is connected to the pure water tank 10101, and the first output end of the first heat exchanger 10102 is connected to a first connecting pipe 10108. The first heat exchanger 10102 is designed to facilitate connection between the external drain port 10105 and an external pipe, allowing external drain water to flow into the first heat exchanger 10102 and exchange heat with the flash condensate generated by the flash evaporation and concentration unit 102. The flash condensate, after preheating the external drain water, is then discharged into the pure water tank 10101 for collection. The other end of the first connecting pipe 10108 is connected to the first input end of the second heat exchanger 10103, facilitating the flow of preheated external drain water into the second heat exchanger 10103. The second heat exchanger 10102... The second input end of the 03 is equipped with a steam interface 10107. The first output end of the second heat exchanger 10103 is connected to a concentration pipe 10109, and the second output end of the second heat exchanger 10103 is connected to a pure water tank 10101. The setting of the second heat exchanger 10103 facilitates the connection of the steam interface 10107 to an external pipeline, and facilitates the introduction of waste heat steam from the production unit into the second heat exchanger 10103 to heat the external drainage. After heating, the external drainage is introduced from the inside of the concentration pipe 10109 into the flash concentration component 102 for concentration and recovery. The condensate generated after steam heat exchange is discharged into the pure water tank 10101 for collection.

[0035] The flash concentration assembly 102 includes a flash tank 10201 and a third heat exchanger 10205. A liquid inlet 10202 is located at the bottom of one side of the flash tank 10201. The liquid inlet 10202 near the water recovery assembly 101 is connected to one end of the concentration pipe 10109. A seed crystal interface 10208 is located at the top of one side of the flash tank 10201. The seed crystal interface 10208 facilitates the flow of heated external drainage into the flash tank 10201 for flash concentration. The seed crystal interface 10208 also facilitates the entry of calcium carbonate powder into the flash concentration assembly 102, preventing scaling.

[0036] The third heat exchanger 10205 is equipped with a discharge pump 10203 and a vacuum pump 10204 on one side. The input end of the discharge pump 10203 is connected to the bottom end of the flash tank 10201, and the output end of the discharge pump 10203 is connected to the first input end of the third heat exchanger 10205. The discharge pump 10203 facilitates the pumping of the concentrated liquid after flash evaporation inside the flash tank 10201 into the third heat exchanger 10205 for heat exchange.

[0037] The vacuum pump 10204 has its input end connected to the top of the flash tank 10201 and its output end connected to the second input end of the third heat exchanger 10205. The vacuum pump 10204 is designed to evacuate the flash tank 10201 to a vacuum and pump the flash vapor generated by the flash evaporation of the flash tank 10201 into the third heat exchanger 10205 for heat exchange.

[0038] The third heat exchanger 10205 has a concentrate interface 10206 at its first output end. The concentrate interface 10206 is connected to the liquid inlet interface 10202 of the adjacent flash tank 10201. The connection between the concentrate interface 10206 and the liquid inlet interface 10202 of the adjacent flash tank 10201 facilitates the interconnection of the three flash concentration components 102. The concentrate heated by the flash steam is then fed into the adjacent flash tank 10201 for further flash concentration.

[0039] The third heat exchanger 10205 has a flash condensate interface 10207 at its second output end. The flash condensate interface 10207 is connected to the flash condensate pipe 10106. The connection between the flash condensate interface 10207 and the flash condensate pipe 10106 facilitates the flow of the flash condensate generated by the flash concentration component 102 into the first heat exchanger 10102 for preheating of the external drainage.

[0040] The slag discharge assembly 103 includes a powder tank 10301. The input end of the powder tank 10301 is connected to a second connecting pipe 10302. The other end of the second connecting pipe 10302 is connected to the concentrate interface 10206 of the adjacent third heat exchanger 10205. The connection between the other end of the second connecting pipe 10302 and the concentrate interface 10206 of the adjacent third heat exchanger 10205 facilitates the flow of the concentrate after being concentrated by the three flash concentration assemblies 102 into the powder tank 10301.

[0041] The powder tank 10301 is equipped with an agitator inside and a slag discharge port 10303 at the bottom. A recovery tank 10304 is connected to one side of the powder tank 10301. The agitator facilitates the stirring of the powder tank 10301, so that the calcium carbonate powder is suspended in the concentrate. Calcium carbonate with attached sparingly soluble salts is discharged from the slag discharge port 10303, while calcium carbonate without attached sparingly soluble salts overflows into the recovery tank 10304 with the concentrate.

[0042] The recovery tank 10304 has a clear liquid interface 10306 at the top of one side and a reflux pump 10305 at the bottom of one side. The input end of the reflux pump 10305 is connected to the bottom of one side of the recovery tank 10304. The clear liquid interface 10306 and the reflux pump 10305 facilitate the precipitation of the concentrated solution mixed with calcium carbonate inside the recovery tank 10304, and the supernatant is discharged as waste liquid from the clear liquid interface 10306.

[0043] The reflux pump 10305 has a reflux pipe 10307 connected to its output end. One end of the reflux pipe 10307 is connected to the seed crystal interface 10208, and a dispensing interface 10308 is provided at the top of one end of the reflux pipe 10307. By connecting the reflux pipe 10307 to the seed crystal interface 10208 and providing the dispensing interface 10308 at the top of one end of the reflux pipe 10307, ​​the reflux pump 10305 can pump the precipitated calcium carbonate to the flash tank 10201 near the water recovery component 101 for internal circulation. The dispensing interface 10308 is connected to an external pipeline for convenient replenishment of calcium carbonate to the device.

[0044] Specifically, the working principle of this waste heat recovery external drainage device is as follows: During use, the first heat exchanger 10102 facilitates connection of the external drainage interface 10105 to an external pipeline, allowing the external drainage to flow into the first heat exchanger 10102 and exchange heat with the flash condensate generated by the flash evaporation and concentration component 102. After preheating the external drainage, the flash condensate is discharged into the pure water tank 10101 for collection. The other end of the first connecting pipe 10108 is connected to the first input end of the second heat exchanger 10103, facilitating the flow of the preheated external drainage into the second heat exchanger 10103. The second heat exchanger 10103 also facilitates connection of the steam interface 10107 to an external pipeline, allowing the waste heat steam from the production unit to flow into the second heat exchanger. Heat exchanger 10103 heats the external drainage. The heated drainage flows from the inside of concentration pipe 10109 into flash concentration component 102 for concentration and recovery. The condensate generated after steam heat exchange is discharged into pure water tank 10101 for collection. A pure water interface 10104 is provided on one side of pure water tank 10101 to facilitate the collection of pure water recovered during the operation of the device. Pure water interface 10104 is connected to an external pipeline for convenient use of the recovered pure water. The liquid inlet 10202 of flash tank 10201, which is close to water recovery component 101, is connected to one end of concentration pipe 10109. A seed interface 10208 is provided at the top of one side of flash tank 10201 to facilitate the flow of heated external drainage. Flash concentration is performed inside flash tank 10201. Seed interface 10208 facilitates the entry of calcium carbonate powder into flash concentration component 102, preventing scaling. Discharge pump 10203 pumps the concentrated liquid from flash tank 10201 into third heat exchanger 10205 for heat exchange. Vacuum pump 10204 evacuates flash tank 10201 to a vacuum and pumps the flash vapor generated by flash evaporation into third heat exchanger 10205 for heat exchange. Concentrate interface 10206 connects to the inlet interface 10202 of adjacent flash tank 10201, allowing the three flash concentration components 102 to be connected in series. The concentrated liquid, heated by flash steam, is fed into an adjacent flash tank 10201 for further flash concentration. It is connected to the flash condensate pipe 10106 via the flash condensate inlet 10207, allowing the flash condensate generated by the flash concentration assembly 102 to be preheated by the external drainage in the first heat exchanger 10102. The other end of the second connecting pipe 10302 is connected to the concentrated liquid inlet 10206 of the adjacent third heat exchanger 10205, allowing the concentrated liquid from the three flash concentration assemblies 102 to be fed into the powder tank 10301. A stirrer in the powder tank 10301 ensures the calcium carbonate powder remains suspended within the concentrated liquid. Calcium carbonate with attached sparingly soluble salts is discharged from the slag outlet 10303.Calcium carbonate without attached sparingly soluble salts overflows with the concentrate into the recovery tank 10304. The presence of a clear liquid inlet 10306 and a reflux pump 10305 facilitates the sedimentation of the concentrate containing calcium carbonate within the recovery tank 10304. The supernatant is discharged as waste liquid from the clear liquid inlet 10306 and connected to the seed crystal inlet 10208 at one end via a reflux pipe 10307. A dispensing port 10308 is located at the top of one end of the reflux pipe 10307, ​​allowing the reflux pump 10305 to pump the precipitated calcium carbonate to the flash tank 10201 near the water recovery assembly 101 for recycling. The dispensing port 10308 connects to an external pipeline for convenient replenishment of calcium carbonate to the system.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for recovering waste water using the waste heat of a device, characterized by, The system includes a water recovery assembly (101) and a slag discharge assembly (103). Three flash concentration assemblies (102) are located between the water recovery assembly (101) and the slag discharge assembly (103). The water recovery assembly (101) includes a pure water tank (10101), a first heat exchanger (10102), and a second heat exchanger (10103). A pure water inlet (10104) is provided on one side of the pure water tank (10101). An external drain inlet (10105) is provided at the first input end of the first heat exchanger (10102), and a flash condensate pipe (10106) is connected to the second input end of the first heat exchanger (10102). The second output end of the first heat exchanger (10102) is connected to the pure water tank (10101), and the first output end of the first heat exchanger (10102) is connected to the first connecting pipe (10108). The other end of the first connecting pipe (10108) is connected to the first input end of the second heat exchanger (10103). The second input end of the second heat exchanger (10103) is provided with a steam interface (10107). The first output end of the second heat exchanger (10103) is connected to a concentration pipe (10109), and the second output end of the second heat exchanger (10103) is connected to the pure water tank (10101).

2. The waste heat recovery and external drainage device according to claim 1, characterized in that, The flash concentration assembly (102) includes a flash tank (10201) and a third heat exchanger (10205). The flash tank (10201) has a liquid inlet (10202) at the bottom of one side. The liquid inlet (10202) of the flash tank (10201) near the water recovery assembly (101) is connected to one end of the concentration tube (10109). The flash tank (10201) has a seed crystal interface (10208) at the top of one side.

3. The device according to claim 2, characterized in that, The third heat exchanger (10205) is provided with a discharge pump (10203) and a vacuum pump (10204) on one side. The input end of the discharge pump (10203) is connected to the bottom end of the flash tank (10201), and the output end of the discharge pump (10203) is connected to the first input end of the third heat exchanger (10205).

4. The device according to claim 3, characterized in that, The input end of the vacuum pump (10204) is connected to the top of the flash tank (10201), and the output end of the vacuum pump (10204) is connected to the second input end of the third heat exchanger (10205).

5. The waste heat recovery and external drainage device according to claim 4, characterized in that, The third heat exchanger (10205) has a concentrated liquid interface (10206) at its first output end, and the concentrated liquid interface (10206) is connected to the liquid inlet interface (10202) of the adjacent flash tank (10201).

6. The device according to claim 5, wherein, The third heat exchanger (10205) has a flash condensate inlet (10207) at its second output end, which is connected to the flash condensate pipe (10106).

7. The waste heat recovery and external drainage device according to claim 1, characterized in that, The slag discharge assembly (103) includes a powder tank (10301), the input end of which is connected to a second connecting pipe (10302), and the other end of the second connecting pipe (10302) is connected to the concentrate interface (10206) of the adjacent third heat exchanger (10205).

8. The waste heat recovery and external drainage device according to claim 7, characterized in that, The powder tank (10301) is equipped with a stirrer inside, and a slag discharge port (10303) is opened at the bottom of the powder tank (10301). A recycling tank (10304) is connected to one side of the powder tank (10301).

9. The device according to claim 8, characterized in that, The top of one side of the recycling tank (10304) is provided with a clear liquid interface (10306), and the bottom of the recycling tank (10304) is provided with a reflux pump (10305), the input end of which is connected to the bottom of one side of the recycling tank (10304).

10. A waste heat recovery and external drainage device according to claim 9, characterized in that, The output end of the reflux pump (10305) is connected to a reflux pipe (10307). One end of the reflux pipe (10307) is connected to the seed interface (10208), and a dispensing interface (10308) is opened at the top of one end of the reflux pipe (10307).

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