Heat pump system for treating high-salt waste liquid

Abstract

The utility model provides a heat pump system for treating high-salt waste liquid, and relates to the technical field of waste liquid treatment. A first containing cavity and a pipe body communicated with the first containing cavity are formed in an evaporation tank, the first containing cavity is used for containing high-salt waste liquid, a second containing cavity is formed between the pipe wall of the pipe body and the inner wall of the evaporation tank, and an opening is formed in the top of the pipe body. A first coil pipe of the refrigerant loop is located in the first containing cavity and makes contact with the high-salt waste liquid so that the high-salt waste liquid can be boiled and evaporated. A second coil pipe of the cold water module is wound on the outer wall of the pipe body, and the two ends of the second coil pipe are connected with the cold water assembly, so that cooling liquid in the cold water assembly flows through the second coil pipe to absorb heat of steam. According to the technical scheme, an outdoor unit structure is omitted, the cold water module is additionally arranged, the second coil pipe of the cold water module is used for heat exchange, cooling capacity is provided, the comprehensive energy efficiency is improved by 5%-10%, and the waste liquid treatment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, and in particular to a heat pump system for treating high-salt waste liquid. Background Technology

[0002] In general, to avoid environmental harm from high-salt waste liquid, it is treated by placing it in an evaporator for low-temperature evaporation. Heat pump systems for treating high-salt waste liquid typically use air-cooled condensers to remove excess heat, but this technology has low energy efficiency. Therefore, there is an urgent need to design a heat pump system for treating high-salt waste liquid that can improve energy efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a heat pump system for treating high-salt waste liquid, thereby solving the technical problem of low energy efficiency in existing heat pump systems.

[0004] Specifically, this utility model provides a heat pump system for treating high-salt waste liquid, comprising:

[0005] An evaporator has a first receiving cavity and a tube communicating with the first receiving cavity. The first receiving cavity is used to contain high-salt waste liquid. A second receiving cavity is defined between the tube wall and the inner wall of the evaporator. The top of the tube is provided with an opening.

[0006] The refrigerant circuit includes a compressor and a first coil connected to the compressor. The first coil is located in the first receiving cavity and is in contact with the high-salt waste liquid to cause the high-salt waste liquid to boil and evaporate. The vapor generated after the high-salt waste liquid evaporates enters from the opening between the pipe body and the evaporator.

[0007] The chilled water module includes a chilled water assembly and a second coil. The second coil is wound around the outer wall of the pipe body and its two ends are respectively connected to the chilled water assembly, so that the coolant in the chilled water assembly flows through the second coil to absorb the heat of the steam.

[0008] Optionally, the cooling water assembly includes a fan and a coolant storage tank. The coolant storage tank stores the coolant and has an inlet and an outlet. The coolant enters the second coil from the outlet, absorbs heat, and then returns to the coolant storage tank from the inlet. The fan is used to dissipate heat from the coolant.

[0009] Optionally, the refrigerant circuit further includes a third coil, which is wound around the outer wall of the pipe body and connected to the compressor, and the third coil is located downstream of the first coil.

[0010] Optionally, the refrigerant circuit further includes a fourth coil, which is located upstream of the third coil and connected to the first coil;

[0011] The heat pump system also includes:

[0012] An ejector, connected to the second receiving cavity inside the evaporator, is used to extract the condensate formed by the condensation of the steam;

[0013] A water storage tank, connected to the jet injector, is used to store the condensate. The fourth coil is located inside the water storage tank and is used to cool the condensate.

[0014] Optionally, the heat pump system further includes:

[0015] A first water pump, connected to the ejector and the water storage tank, is used to provide water flow to the ejector, causing the ejector to generate negative pressure.

[0016] The second water pump is connected to the water storage tank and is used to turn on when the condensate reaches a preset amount, so as to discharge the condensate in the water storage tank.

[0017] Optionally, the heat pump system further includes:

[0018] The water inlet path is connected to the first receiving cavity and includes at least one first switching valve, which is configured to deliver the high-salt waste liquid into the first receiving cavity when it is open;

[0019] The drainage path is connected to the bottom of the first receiving cavity and includes a third water pump and a second switching valve. The third water pump and the second switching valve are configured to open simultaneously to discharge the high-salt waste liquid in the first receiving cavity.

[0020] Optionally, the heat pump system further includes:

[0021] The bypass circuit includes an interconnected solenoid valve and a pressure bypass valve, both of which are connected to the compressor.

[0022] Optionally, it also includes:

[0023] The first water level sensor is installed inside the first accommodating cavity;

[0024] The second water level sensor is installed inside the first accommodating cavity and located below the first water level sensor. Both the first and second water level sensors are used to monitor the water level of the high-salt waste liquid.

[0025] In this invention, the evaporator has a first receiving cavity and a tube communicating with the first receiving cavity. The first receiving cavity is used to contain high-salt waste liquid. A second receiving cavity exists between the tube wall and the inner wall of the evaporator, and the top of the tube has an opening. The first coil of the refrigerant circuit is located in the first receiving cavity and is in contact with the high-salt waste liquid to cause it to boil and evaporate. The second coil of the chilled water module is wound around the outer wall of the tube, and its two ends are connected to the chilled water assembly, allowing the coolant in the chilled water assembly to flow through the second coil, thereby absorbing the heat from the steam. This technical solution eliminates the air-cooled condenser, adds a chilled water module, and utilizes the second coil of the chilled water module for heat exchange, improving overall energy efficiency by 5%-10% and reducing waste liquid treatment costs.

[0026] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0027] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0028] Figure 1 This is a schematic structural diagram of a heat pump system according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 A schematic diagram of the refrigerant flow in the heat pump system shown.

[0030] Figure 3 yes Figure 1 A schematic diagram of the drainage flow direction of the evaporator in the heat pump system shown.

[0031] Figure 4 yes Figure 1 The diagram shows a schematic of the water inlet flow direction for the evaporator in the heat pump system.

[0032] Figure label:

[0033] 100-Heat pump system, 10-Compressor, 11-First coil, 12-Third coil, 13-Fourth coil, 14-Water storage tank, 15-Ejector, 16-First water pump, 17-Second water pump, 18-Solenoid valve, 19-Pressure bypass valve, 20-Chilled water module, 21-Chilled water assembly, 22-Second coil, 211-Coolant storage tank, 212-Fan, 30-Evaporator, 31-First receiving cavity, 32-Pipe body, 33-Second receiving cavity, 40-First switching valve, 50-Second switching valve, 60-Third water pump, 70-First water level sensor, 80-Second water level sensor, 90-Oil separator. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0037] Unless otherwise expressly specified and limited, the terms "connection," "installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] Figure 1 This is a schematic structural diagram of a heat pump system 100 for treating high-salt waste liquid according to an embodiment of the present invention. Figure 2 yes Figure 1 The diagram shows a schematic flow of refrigerant in the heat pump system 100. Figure 2 The arrows in the diagram indicate the direction of refrigerant flow. For example... Figures 1 to 2 As shown, in one embodiment, a heat pump system 100 for treating high-salt waste liquid includes an evaporator 30, a refrigerant circuit, and a chilled water module 20. The evaporator 30 has a first receiving cavity 31 and a pipe 32 communicating with the first receiving cavity 31. The first receiving cavity 31 is used to contain the high-salt waste liquid. A second receiving cavity 33 is defined between the pipe wall of the pipe 32 and the inner wall of the evaporator 30. The top of the pipe 32 has an opening. The refrigerant circuit includes a compressor 10 and a first coil 11 connected to the compressor 10. The first coil 11 is located within the first receiving cavity 31 and is in contact with the high-salt waste liquid to cause the high-salt waste liquid to boil and evaporate. The vapor generated after the high-salt waste liquid evaporates enters from the opening between the pipe 32 and the evaporator 30. The chilled water module 20 includes a chilled water assembly 21 and a second coil 22. The second coil 22 is wound around the outer wall of the pipe body 32 and its two ends are respectively connected to the chilled water assembly 21 so that the coolant in the chilled water assembly 21 flows through the second coil 22 to absorb the heat of the steam.

[0040] This embodiment eliminates the air-cooled condenser and adds a chilled water module 20. The second coil 22 of the chilled water module 20 is used for heat exchange, which improves the overall energy efficiency by 5%-10% and reduces the cost of waste liquid treatment.

[0041] In some embodiments, the cooling water assembly 21 includes a fan 212 and a coolant storage tank 211. The coolant storage tank 211 stores coolant and has an inlet and an outlet. The coolant enters the second coil 22 from the outlet, absorbs heat, and then returns to the coolant storage tank 211 from the inlet. The fan 212 is used to dissipate heat from the coolant in the coolant storage tank 211. See also Figure 1 The inlet and outlet of the coolant storage tank 211 are connected to the second coil 22. The coolant flows from the outlet of the coolant storage tank 211 into the second coil 22, and after absorbing heat, it returns to the coolant storage tank 211 from the inlet.

[0042] In some embodiments, the refrigerant circuit further includes a third coil 12, which is wound around the outer wall of the tube body 32 and connected to the compressor 10. The third coil 12 is located downstream of the first coil 11. The refrigerant in the third coil 12 can condense the vapor that has evaporated.

[0043] In some embodiments, the refrigerant circuit further includes a fourth coil 13, which is located upstream of the third coil 12 and connected to the first coil 11. The heat pump system 100 also includes an ejector 15 and a water storage tank 14. The ejector 15 communicates with a second receiving cavity 33 within the evaporator 30 and is used to extract condensate formed by steam condensation. The water storage tank 14 is communicated with the ejector 15 and is used to store condensate. The fourth coil 13 is located within the water storage tank 14 and is used to cool the condensate. This embodiment allows for the recovery of condensate.

[0044] In some embodiments, the heat pump system 100 further includes a first water pump 16 and a second water pump 17. The first water pump 16 is connected to the ejector 15 and the water storage tank 14 to provide water flow to the ejector 15, causing the ejector 15 to generate negative pressure. The second water pump 17 is connected to the water storage tank 14 and is activated when the condensate reaches a preset amount to discharge the condensate in the water storage tank 14. Here, the first water pump 16 provides water flow to the ejector 15, causing the ejector 15 to generate negative pressure. The ejector 15 draws condensate from the evaporator 30 into the water storage tank 14. The refrigerant in the fourth coil 13 evaporates and absorbs heat, further drawing condensate from the second receiving cavity 33 to ensure the working state of the ejector 15. This is because the pressure inside the ejector 15 is extremely low; excessively hot water would flash, reducing the extraction rate. The cooling module 20 provides additional cooling capacity to maintain the temperature of the liquid in the water storage tank 14 and stabilize the vacuum state of the water storage tank 14. The lower the water temperature, the better the vacuum effect in the water storage tank 14. When there is enough condensate in the water storage tank 14, the second water pump 17 turns on to drain the condensate from the water storage tank 14. The preset amount can be determined according to specific design requirements.

[0045] Figure 3 yes Figure 1 The diagram shows a schematic flow direction of the evaporator 30 in the heat pump system 100. Figure 4 yes Figure 1 The diagram shows the schematic water inlet flow direction of the evaporator 30 in the heat pump system 100. Figure 3 and Figure 4 The arrows in the diagram indicate the direction of flow of the high-salt wastewater. For example... Figure 3 and Figure 4As shown, in some embodiments, the heat pump system 100 further includes an inlet water path and a drain water path. The inlet water path communicates with the first receiving cavity 31 and includes at least one first switching valve 40, which is configured to deliver high-salt waste liquid into the first receiving cavity 31 when open. The drain water path communicates with the bottom of the first receiving cavity 31 and includes a third water pump 60 and a second switching valve 50, which are configured to open simultaneously to discharge the high-salt waste liquid from the first receiving cavity 31.

[0046] In some embodiments, the heat pump system 100 further includes a bypass circuit, which includes an interconnected solenoid valve 18 and a pressure bypass valve 19, both of which are connected to the compressor 10. The bypass circuit provided in this embodiment can protect the compressor 10, regulate system capacity, and improve operational stability.

[0047] In some embodiments, the refrigerant circuit further includes an oil separator 90, which is disposed upstream of the first coil 11 for separating the refrigerant and lubricating oil.

[0048] In some embodiments, the heat pump system 100 further includes a first water level sensor 70 and a second water level sensor 80. The first water level sensor 70 is installed within a first receiving cavity 31. The second water level sensor 80 is installed within the first receiving cavity 31 and located below the first water level sensor 70. Both the first and second water level sensors 70 are used to monitor the water level of the high-salt waste liquid. When the water level of the high-salt waste liquid drops to the height of the second water level sensor 80 (which can be understood as the lowest water level), the second water level sensor 80 triggers a water replenishment signal. When the water level of the high-salt waste liquid rises to the height of the first water level sensor 70, the first water level sensor 70 triggers a stop water intake signal.

[0049] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A heat pump system for treating high-salt waste liquid, characterized in that, include: An evaporator has a first receiving cavity and a tube communicating with the first receiving cavity. The first receiving cavity is used to contain high-salt waste liquid. A second receiving cavity is defined between the tube wall and the inner wall of the evaporator. The top of the tube is provided with an opening. The refrigerant circuit includes a compressor and a first coil connected to the compressor. The first coil is located in the first receiving cavity and is in contact with the high-salt waste liquid to cause the high-salt waste liquid to boil and evaporate. The vapor generated after the high-salt waste liquid evaporates enters from the opening between the pipe body and the evaporator. The chilled water module includes a chilled water assembly and a second coil. The second coil is wound around the outer wall of the pipe body and its two ends are respectively connected to the chilled water assembly, so that the coolant in the chilled water assembly flows through the second coil to absorb the heat of the steam.

2. The heat pump system according to claim 1, characterized in that, The cooling water assembly includes a fan and a coolant storage tank. The coolant storage tank stores the coolant and has an inlet and an outlet. The coolant enters the second coil from the outlet, absorbs heat, and then returns to the coolant storage tank from the inlet. The fan is used to dissipate heat from the coolant.

3. The heat pump system according to claim 1, characterized in that, The refrigerant circuit also includes a third coil, which is wound around the outer wall of the tube body and connected to the compressor. The third coil is located downstream of the first coil.

4. The heat pump system according to claim 3, characterized in that, The refrigerant circuit also includes a fourth coil, which is located upstream of the third coil and connected to the first coil. The heat pump system also includes: An ejector, connected to the second receiving cavity inside the evaporator, is used to extract the condensate formed by the condensation of the steam; A water storage tank, connected to the jet injector, is used to store the condensate. The fourth coil is located inside the water storage tank and is used to cool the condensate.

5. The heat pump system according to claim 4, characterized in that, The heat pump system also includes: A first water pump, connected to the ejector and the water storage tank, is used to provide water flow to the ejector, causing the ejector to generate negative pressure. The second water pump is connected to the water storage tank and is used to turn on when the condensate reaches a preset amount, so as to discharge the condensate in the water storage tank.

6. The heat pump system according to claim 5, characterized in that, The heat pump system also includes: The water inlet path is connected to the first receiving cavity and includes at least one first switching valve, which is configured to deliver the high-salt waste liquid into the first receiving cavity when it is open; The drainage path is connected to the bottom of the first receiving cavity and includes a third water pump and a second switching valve. The third water pump and the second switching valve are configured to open simultaneously to discharge the high-salt waste liquid in the first receiving cavity.

7. The heat pump system according to claim 6, characterized in that, The heat pump system also includes: The bypass circuit includes an interconnected solenoid valve and a pressure bypass valve, both of which are connected to the compressor.

8. The heat pump system of claim 7, wherein, Also includes: The first water level sensor is installed inside the first accommodating cavity; The second water level sensor is installed inside the first receiving cavity and located below the first water level sensor. Both the first and second water level sensors are used to monitor the water level of the high-salt waste liquid.

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