A low-temperature evaporation system for waste liquid

Abstract

The utility model discloses a kind of waste liquid low-temperature evaporation systems, including evaporator, inlet is equipped on the evaporator, inlet is equipped with liquid inlet valve, the bottom end of the evaporator is equipped with discharge port, discharge port is equipped with discharge assembly, low-temperature heating assembly is equipped in the evaporator, the upper end of the evaporator is equipped with gas outlet, the gas outlet is equipped with the cooling assembly for being communicated with for cooling steam.The device can effectively waste temperature evaporation, and waste liquid is low-temperature evaporation, waste liquid can effectively prevent the chemical position in waste liquid from reacting under the condition of high temperature in low-temperature environment, and the device can also discharge steam and evaporate substance, facilitate subsequent reuse.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a low-temperature evaporation system for waste liquid. Background Technology

[0002] Wastewater is generated during the production of battery separators. This wastewater contains harmful substances such as grease, trichloroethylene, flocculants, impurities, and emulsifiers. Therefore, the wastewater needs to be evaporated to remove water impurities and collect other impurities.

[0003] However, existing evaporation devices often involve continuous heating of wastewater. While this can effectively evaporate the water in the wastewater, the high temperature during evaporation can cause other chemical substances contained within the wastewater to react. Utility Model Content

[0004] (a) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a low-temperature evaporation system for waste liquid. This device can effectively evaporate waste at high temperatures and perform low-temperature evaporation of waste liquid. Evaporation of waste liquid at low temperatures can effectively prevent chemical reactions in waste liquid at high temperatures. In addition, the device can also discharge steam and substances that cannot be evaporated, which is convenient for subsequent reuse.

[0006] (II) Technical Solution

[0007] This utility model provides a low-temperature evaporation system for waste liquid, including an evaporation box. The evaporation box is provided with a feed inlet and a liquid inlet valve. The bottom of the evaporation box is provided with a discharge outlet and a discharge assembly. The evaporation box is provided with a low-temperature heating assembly. The top of the evaporation box is provided with a gas outlet and a cooling assembly for cooling the steam is connected to the gas outlet.

[0008] Preferably, the discharge assembly includes a discharge pipe, a drain valve, and a drain pump. The discharge pipe is connected to and communicates with the discharge port. The discharge pipe is equipped with a drain valve. The inlet end of the drain pump is connected to and communicates with the end of the discharge pipe away from the evaporator.

[0009] Preferably, the cooling component includes an air outlet pipe, a shell-and-tube heat exchanger, and a liquid outlet pipe. One end of the air outlet pipe is connected to and communicates with the air outlet, and the other end of the air outlet pipe is connected to and communicates with the air inlet of the shell-and-tube heat exchanger. One end of the liquid outlet pipe is connected to and communicates with the liquid outlet of the shell-and-tube heat exchanger, and the other end of the liquid outlet pipe is connected to a cooling water tank via a vacuum pump.

[0010] Preferably, the low-temperature heating component includes a coil and a heat transfer pipe. The evaporator is provided with a coil, and the evaporator is provided with a first opening and a second opening that are interconnected with both ends of the coil. The two ends of the heat transfer pipe are connected to and interconnected with the first opening and the second opening, respectively. A condenser and a compressor are respectively provided on the heat transfer pipe. The heat transfer pipe is connected to the condenser and the compressor, respectively. The compressor is located at the end near the first opening. A liquid vaporization unit is provided between the condenser and the compressor. The liquid vaporization unit is connected to the condensate of the shell-and-tube heat exchanger.

[0011] Preferably, the liquid vaporization unit includes a shell-and-tube heat exchanger, the heat transfer tube is connected to the shell-and-tube heat exchanger, the shell-and-tube heat exchanger is located between the condenser and the compressor, the condensate outlet of the shell-and-tube heat exchanger is connected to the inlet of the shell-and-tube heat exchanger through a first connecting pipe, and the condensate inlet of the shell-and-tube heat exchanger is connected to the outlet of the shell-and-tube heat exchanger through a second connecting pipe.

[0012] Preferably, two liquid level sensors are provided at intervals on the upper and lower sides of the inner wall of the evaporator.

[0013] Preferably, the inner wall of the evaporator is provided with a third opening and a fourth opening, the third opening is provided with a vent valve, the fourth opening is connected to a feed pipe, and the feed pipe is provided with a defoaming valve.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0015] In this invention, the device can effectively evaporate waste at high temperature and evaporate waste liquid at low temperature. Evaporation of waste liquid at low temperature can effectively prevent chemical reactions in waste liquid at high temperature. In addition, the device can also discharge steam and substances that cannot be evaporated, which is convenient for subsequent reuse. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a low-temperature evaporation system for waste liquid proposed in this utility model.

[0017] Reference numerals in the attached diagram: 1. Evaporator; 2. Inlet valve; 3. Outlet pipe; 4. Drain valve; 5. Drain pump; 6. Outlet pipe; 7. Shell and tube heat exchanger; 8. Vacuum pump; 9. Cooling water tank; 10. Heat transfer pipe; 11. Condenser; 12. Compressor; 13. Shell and tube heat exchanger; 14. First connecting pipe; 15. Second connecting pipe; 16. Inlet pipe; 17. Vent valve; 18. Defoaming valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 As shown, the present invention proposes a low-temperature evaporation system for waste liquid, including an evaporation tank 1, an inlet on the evaporation tank 1, an inlet valve 2 at the inlet, an outlet at the bottom of the evaporation tank 1, a discharge assembly at the outlet, a low-temperature heating assembly inside the evaporation tank 1, and an outlet at the top of the evaporation tank 1, which is connected to a cooling assembly for cooling the steam.

[0022] In this invention, when the device is needed, waste liquid can be introduced into the evaporator 1 by opening the inlet valve 2. The waste liquid in the evaporator 1 is then evaporated at a low temperature by the low-temperature heating component. The evaporated liquid is discharged through the outlet and the vapor is cooled by the cooling component, thereby collecting or discharging it. After the waste liquid is evaporated, any solvents or substances in the waste that cannot be evaporated are discharged through the discharge component at the outlet. This device can effectively evaporate waste at a high temperature and perform low-temperature evaporation of waste liquid. Evaporation of waste liquid at a low temperature can effectively prevent chemical reactions in the waste liquid at high temperatures. The device can also discharge vapor and substances that cannot be evaporated, facilitating subsequent reuse.

[0023] In an optional embodiment, the discharge assembly includes a discharge pipe 3, a drain valve 4, and a drain pump 5. The discharge pipe 3 is connected to and communicates with the discharge port. The discharge pipe 3 is equipped with a drain valve 4. The inlet end of the drain pump 5 is connected to and communicates with the end of the discharge pipe 3 away from the evaporator 1. The drain valve 4 can effectively control the opening and closing of the discharge pipe 3, so that the liquid that cannot be evaporated in the evaporator 1 can be effectively discharged under the action of the drain pump 5.

[0024] In an optional embodiment, the cooling assembly includes an exhaust pipe 6, a tubular heat exchanger 7, and a liquid outlet pipe. One end of the exhaust pipe 6 is connected to and communicates with the exhaust port, and the other end of the exhaust pipe 6 is connected to and communicates with the inlet end of the tubular heat exchanger 7. One end of the liquid outlet pipe is connected to and communicates with the liquid outlet end of the tubular heat exchanger 7, and the other end of the liquid outlet pipe is connected to a cooling water tank 9 via a vacuum pump 8. The tubular heat exchanger 7 can effectively cool and liquefy the vapor from the waste liquid, so that it enters the cooling water tank 9 for collection under the action of the vacuum pump 8.

[0025] In an optional embodiment, the low-temperature heating component includes a coil and a heat transfer pipe 10. The evaporator 1 is provided with the coil, and the evaporator 1 has a first opening and a second opening that communicate with both ends of the coil. The two ends of the heat transfer pipe 10 are connected to and communicate with the first opening and the second opening, respectively. A condenser 11 and a compressor 12 are respectively provided on the heat transfer pipe 10. The heat transfer pipe 10 communicates with the condenser 11 and the compressor 12, respectively. The compressor 12 is located at the end near the first opening, and a liquid vaporization unit is provided between the condenser 11 and the compressor 12. The liquid vaporization unit is connected to the condensate of the shell-and-tube heat exchanger 7. The temperature of the gas compressed by the compressor 12 will rise, but the temperature rise is limited. Thus, the gas compressed by the compressor 12 continuously passes through the coil, which can realize the evaporation of the waste liquid in the evaporator 1. Since the temperature of the gas passing through the coil will gradually decrease, the temperature of the coil will not continue to rise, thereby achieving low-temperature evaporation of the waste liquid and preventing the temperature inside the evaporator from rising continuously. The gas passing through the coil enters the condenser 11 and will be re-liquefied. The liquefied liquid passes through the liquid vaporization unit, is re-vaporized, and is compressed again to form a complete cycle operation.

[0026] In an optional embodiment, the liquid vaporization unit includes a shell-and-tube heat exchanger 13, with the heat transfer pipe 10 connected to the shell-and-tube heat exchanger 13. The shell-and-tube heat exchanger 13 is located between the condenser 11 and the compressor 12. The condensate outlet of the shell-and-tube heat exchanger 7 is connected to the inlet of the shell-and-tube heat exchanger 13 via a first connecting pipe 14, and the condensate inlet of the shell-and-tube heat exchanger 7 is connected to the outlet of the shell-and-tube heat exchanger 13 via a second connecting pipe 15. During low-temperature evaporation of the liquid, the compressor 12... Compressed gas enters the coil, thereby evaporating the waste liquid in the evaporator 1. After passing through the coil, the gas enters the condenser 11, where it cools the liquid. The liquefied liquid then enters the shell-and-tube heat exchanger 13, further cooling the condensate in the shell-and-tube heat exchanger 7. During the cooling process, the liquefied liquid is re-vaporized and passes through the compressor 12 again, completing a cycle. Thus, the shell-and-tube heat exchanger 13 can both cool the condensate in the shell-and-tube heat exchanger 7 and perform the vaporization of the liquefied liquid, effectively saving energy.

[0027] In an optional embodiment, two liquid level sensors are provided at intervals on the inner wall of the evaporator 1. The two liquid level sensors can effectively monitor the waste liquid content in the evaporator 1, thereby enabling more precise control of the operation of the device.

[0028] In an optional embodiment, the inner wall of the evaporator 1 is provided with a third opening and a fourth opening. The third opening is provided with a vent valve 17, and the fourth opening is connected to a feed pipe 16. The feed pipe 16 is provided with a defoaming valve 18. The defoaming valve 18 can effectively control the opening and closing of the fourth opening, so that defoaming agent can be added into the evaporator 1 through the feed pipe 16. This effectively prevents a large number of water bubbles from appearing during the evaporation process of the waste liquid, which would affect the evaporation effect. Furthermore, the device can effectively control the third opening through the vent valve 17, thereby effectively preventing pressure relief when the gas pressure in the evaporator 1 is too high, thus effectively improving the safety performance of the device.

[0029] All valves mentioned in the above application can be solenoid valves, and the specific installation method and subsequent connection structure of the sensor designed in the application are existing technologies, so they are not described in detail in this application.

[0030] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A low-temperature evaporation system for waste liquid, characterized in that, The system includes an evaporator with a feed inlet and a liquid inlet valve. The bottom of the evaporator has a discharge outlet with a discharge assembly. A low-temperature heating element is located inside the evaporator. An exhaust outlet is located at the top of the evaporator and is connected to a cooling assembly for cooling the steam. The cooling assembly includes an exhaust pipe, a tubular heat exchanger, and a liquid outlet pipe. One end of the exhaust pipe is connected to the exhaust outlet and the other end is connected to the inlet of the tubular heat exchanger and the liquid outlet pipe is connected to the outlet of the tubular heat exchanger. The other end of the liquid pipe is connected to the cooling water tank via a vacuum pump; the low-temperature heating component includes a coil and a heat transfer pipe. The evaporator is equipped with a coil, and the evaporator is provided with a first opening and a second opening that are connected to both ends of the coil. The two ends of the heat transfer pipe are connected to the first opening and the second opening, respectively, and are interconnected. The heat transfer pipe is equipped with a condenser and a compressor, respectively, and is connected to the condenser and the compressor. The compressor is located at the end near the first opening. A liquid vaporization unit is provided between the condenser and the compressor, and the liquid vaporization unit is connected to the condensate of the shell-and-tube heat exchanger.

2. The waste liquid low-temperature evaporation system according to claim 1, characterized in that, The discharge assembly includes a discharge pipe, a drain valve, and a drain pump. The discharge pipe is connected to and communicates with the discharge port. The discharge pipe is equipped with a drain valve. The inlet end of the drain pump is connected to and communicates with the end of the discharge pipe away from the evaporator.

3. The waste liquid low-temperature evaporation system according to claim 1, characterized in that, The liquid vaporization unit includes a shell-and-tube heat exchanger, the heat transfer tube is connected to the shell-and-tube heat exchanger, the shell-and-tube heat exchanger is located between the condenser and the compressor, the condensate outlet of the shell-and-tube heat exchanger is connected to the inlet of the shell-and-tube heat exchanger through a first connecting pipe, and the condensate inlet of the shell-and-tube heat exchanger is connected to the outlet of the shell-and-tube heat exchanger through a second connecting pipe.

4. The waste liquid low-temperature evaporation system according to claim 1, characterized in that, The evaporator has two liquid level sensors spaced at intervals on the inner wall.

5. The waste liquid low-temperature evaporation system according to claim 1, characterized in that, The evaporator has a third opening and a fourth opening on its inner wall. The third opening is equipped with a vent valve, and the fourth opening is connected to a feed pipe. The feed pipe is equipped with a defoaming valve.

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