A distillation system for recovering cold

Abstract

This application relates to a distillation system for cold energy recovery, belonging to the field of waste liquid treatment technology. The distillation system includes: an evaporation kettle, comprising an evaporation chamber and a cooling chamber connected to each other; a waste liquid separation component, comprising a compressor, a first coil, a condenser, a second coil, and an evaporator connected in sequence to form a closed loop, wherein the first coil is disposed in the evaporation chamber to evaporate the waste liquid into steam, and the second coil is disposed in the cooling chamber to condense the steam into distilled water; and a cold energy recovery component, comprising a first water tank connected to the cooling chamber and a third coil disposed in the water tank, wherein the third coil is connected between the first coil and the condenser, and the third coil is used to absorb the cold energy of the distilled water in the first water tank. This application recovers the cold energy from the distilled water by exchanging heat between the distilled water cooled in the cooling chamber and the refrigerant before entering the condenser, thereby effectively reducing cold energy loss and lowering the cost of waste liquid treatment.

Description

Technical Field

[0001] This utility model relates to a distillation system for cold energy recovery, belonging to the field of waste liquid treatment technology. Background Technology

[0002] Evaporation is a commonly used waste liquid treatment process. It involves evaporating waste liquid at high temperature to form steam, and then condensing the steam with a refrigerant to form distilled water, thereby achieving waste liquid separation. However, the temperature of the distilled water after condensation with a refrigerant is usually lower than the temperature of the refrigerant before it enters the condenser, resulting in a loss of cooling capacity and increasing the cost of waste liquid treatment. Therefore, it is urgent to design a distillation system that can recover cooling capacity. Utility Model Content

[0003] The purpose of this invention is to provide a distillation system for recovering cold energy to solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a distillation system for cold energy recovery, the distillation system comprising:

[0005] An evaporator, comprising an evaporation chamber and a cooling chamber that are interconnected;

[0006] The waste liquid separation assembly includes a compressor, a first coil, a condenser, a second coil, and an evaporator connected in sequence to form a closed loop. The first coil is disposed in the evaporation chamber to evaporate the waste liquid into steam, and the second coil is disposed in the cooling chamber to condense the steam into distilled water.

[0007] The cold energy recovery assembly includes a first water tank communicating with the cooling chamber and a third coil disposed within the water tank. The third coil is connected between the first coil and the condenser and is used to absorb the cold energy of distilled water in the first water tank.

[0008] Furthermore, the distillation system also includes a second water tank and a fourth coil disposed within the second water tank, the second water tank being connected between the cooling chamber and the first water tank, and the fourth coil being connected between the second coil and the condenser.

[0009] Furthermore, the distillation system also includes an oil separator, which is connected between the first coil and the compressor. A straight-through pipeline is provided between the oil separator and the fourth coil, and a solenoid valve is provided on the straight-through pipeline.

[0010] Furthermore, the distillation system also includes a first water pump and a second water pump, wherein the first water pump is connected between the second water tank and the first water tank, and the second water pump is connected between the cooling chamber and the first water tank.

[0011] Furthermore, the distillation system also includes an ejector disposed between the cooling chamber and the first water tank, and the second water pump is connected to the cooling chamber through the ejector.

[0012] Furthermore, the distillation system also includes a water level sensor, which is installed in the evaporation chamber and is used to monitor the water level of the waste liquid in the evaporation chamber.

[0013] Furthermore, the distillation system also includes a water inlet pipe and a drain pipe, the water inlet pipe being connected to the evaporation chamber and the drain pipe being connected to the first water tank.

[0014] Furthermore, a slag discharge port is provided at the bottom of the evaporation chamber.

[0015] The beneficial effects of this utility model are as follows: By setting up a first water tank and a third row of pipes, the distilled water cooled by the cooling chamber is heat-exchanged with the refrigerant before entering the condenser, and the coldness in the distilled water is recovered, thereby reducing the temperature of the refrigerant before entering the condenser, thus reducing the heat release cost of the condenser, effectively reducing the loss of coldness, and at the same time reducing the cost of waste liquid treatment.

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a cold energy recovery distillation system according to an embodiment of this application;

[0018] Figure 2 for Figure 1 Refrigerant flow diagram of the distillation system. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0021] Furthermore, 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium.

[0023] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Please refer to Figures 1 to 2 The present application discloses a cold energy recovery distillation system, which includes an evaporator 10, a waste liquid separation component 20, and a cold energy recovery component 30. The evaporator 10 includes an evaporation chamber 11 and a cooling chamber 12 that are interconnected.

[0025] The waste liquid separation assembly 20 includes a compressor 21, a first coil 24, a condenser 22, a second coil 25 and an evaporator 23 connected in sequence to form a closed loop. The first coil 24 is disposed in the evaporation chamber 11 to evaporate the waste liquid to form steam, and the second coil 25 is disposed in the cooling chamber 12 to condense the steam to form distilled water.

[0026] The cold energy recovery assembly 30 includes a first water tank 31 connected to the cooling chamber and a third coil 32 disposed within the water tank. The third coil 32 connects the first coil 24 and the condenser 22, and is used to absorb the cold energy of the distilled water in the first water tank 31. In most cases, the temperature of the refrigerant flowing from the first coil 24 to the third coil 32 is higher than the temperature of the distilled water after condensation in the cooling chamber. By setting up the first water tank 31, heat exchange is achieved between the condensed distilled water and the refrigerant flowing from the first coil 24 to the third coil 32, thereby recovering the cold energy of the condensed distilled water and effectively reducing the temperature of the refrigerant before it enters the condenser 22.

[0027] In one embodiment, the distillation system further includes a second water tank 50 and a fourth coil 26 disposed within the second water tank 50. The second water tank 50 is connected between the cooling chamber 12 and the first water tank 31, and the fourth coil 26 is connected between the second coil 25 and the condenser 22. This arrangement facilitates two-stage cooling and condensation of the distilled water in conjunction with the cooling chamber 12 when cold energy recovery is not required, thereby improving condensation efficiency.

[0028] In one embodiment, the distillation system further includes an oil separator 29, which is connected between the first coil 24 and the compressor 21. A straight-through pipe 27 is provided between the oil separator 29 and the fourth coil 26, and a solenoid valve 28 is installed on the straight-through pipe 27. The oil separator 29 is used to separate the refrigerant and lubricating oil. When high-temperature distilled water is required, the straight-through pipe 27 can facilitate the supply of high-temperature and high-pressure refrigerant to the fourth coil 26 to regulate the temperature of the distilled water.

[0029] In one embodiment, the distillation system further includes a first water pump 60 and a second water pump 70. The first water pump 60 is connected between the second water tank 50 and the first water tank 31, and the second water pump 70 is connected between the cooling chamber and the first water tank 31. The first water pump 60 and the second water pump 70 are configured to facilitate the delivery of distilled water to the first water tank 31 or the second water tank 50.

[0030] In one embodiment, the distillation system further includes an ejector 40 disposed between the cooling chamber and the first water tank 31, and a second water pump 70 connected to the cooling chamber via the ejector 40. This allows the first water pump 60 to generate negative pressure in the ejector 40 to draw distilled water from the cooling chamber.

[0031] In one embodiment, the distillation system further includes a water level sensor 15, which is disposed within the evaporation chamber 11. The water level sensor 15 is used to monitor the water level of the waste liquid within the evaporation chamber 11. When the water level of the waste liquid drops to the height of the water level sensor 15 (i.e., when the water level is at its lowest value), the water level sensor 15 triggers a signal to replenish the waste liquid.

[0032] In one embodiment, the distillation system further includes a water inlet pipe 13 and a drain pipe 33. The water inlet pipe 13 is connected to the evaporation chamber 11, and the drain pipe 33 is connected to the first water tank 31. The water inlet pipe 13 facilitates the replenishment of waste liquid, and the drain pipe 33 facilitates the discharge of distilled water after separation.

[0033] In one embodiment, the bottom of the evaporation chamber 11 is also provided with a slag discharge port 14 to facilitate the discharge of waste liquid residue after separation of distilled water.

[0034] This application sets up a first water tank and a third row of pipes to exchange heat between the distilled water cooled by the cooling chamber and the refrigerant before it enters the condenser, thereby recovering the cold energy in the distilled water, reducing the temperature of the refrigerant before it enters the condenser, thus reducing the heat release cost of the condenser, effectively reducing cold energy loss, and at the same time reducing the cost of waste liquid treatment.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A distillation system for recovering cold energy, characterized in that, The distillation system includes: An evaporator, comprising an evaporation chamber and a cooling chamber that are interconnected; The waste liquid separation assembly includes a compressor, a first coil, a condenser, a second coil, and an evaporator connected in sequence to form a closed loop. The first coil is disposed in the evaporation chamber to evaporate the waste liquid into steam, and the second coil is disposed in the cooling chamber to condense the steam into distilled water. The cold energy recovery assembly includes a first water tank communicating with the cooling chamber and a third coil disposed within the water tank. The third coil is connected between the first coil and the condenser and is used to absorb the cold energy of distilled water in the first water tank.

2. The cold energy recovery distillation system as described in claim 1, characterized in that, The distillation system further includes a second water tank and a fourth coil disposed within the second water tank. The second water tank is connected between the cooling chamber and the first water tank, and the fourth coil is connected between the second coil and the condenser.

3. The cold energy recovery distillation system as described in claim 2, characterized in that, The distillation system also includes an oil separator, which is connected between the first coil and the compressor. A straight-through pipeline is provided between the oil separator and the fourth coil, and a solenoid valve is provided on the straight-through pipeline.

4. The cold energy recovery distillation system as described in claim 2, characterized in that, The distillation system also includes a first water pump and a second water pump, wherein the first water pump is connected between the second water tank and the first water tank, and the second water pump is connected between the cooling chamber and the first water tank.

5. The cold energy recovery distillation system as described in claim 4, characterized in that, The distillation system also includes an ejector, which is disposed between the cooling chamber and the first water tank, and the second water pump is connected to the cooling chamber through the ejector.

6. The cold energy recovery distillation system as described in claim 1, characterized in that, The distillation system also includes a water level sensor, which is installed in the evaporation chamber and is used to monitor the water level of the waste liquid in the evaporation chamber.

7. The cold energy recovery distillation system as described in claim 1, characterized in that, The distillation system also includes a water inlet pipe and a drain pipe, the water inlet pipe being connected to the evaporation chamber and the drain pipe being connected to the first water tank.

8. The cold energy recovery distillation system as described in claim 7, characterized in that, The bottom of the evaporation chamber is also provided with a slag discharge port.

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