High-concentration brine evaporation system based on magnetic drive pump

Abstract

The utility model relates to the technical field of waste liquid treatment, and discloses a high-concentration brine evaporation system based on a magnetic drive pump. A refrigerant heat exchanger; a water storage tank; and a relay bucket; steam generated in the evaporation tank is input into the refrigerant heat exchanger for heat exchange and finally enters the water storage tank to be condensed into water, flowing steam mixed with part of condensate water enters the relay barrel and is stored, a circulating pipeline is formed between the relay barrel and the circulating pump through acting of the magnetic drive pump, mechanical seal water of the circulating pump can circulate, and the mechanical seal water is recycled. Service is provided for the circulating pump, so that operation is more stable; the circulating pump acts to enable the high-concentration brine to circularly flow between the evaporation tank and the tubular heat exchanger, so that the problem that impurities are deposited at the bottom of the evaporation tank due to excessive evaporation, concentration and salt separation of the high-concentration brine in the evaporation tank can be avoided, the stability of the system is improved, and the high-concentration brine is stably and timely discharged for salt separation; the phenomenon that too much precipitation and scaling are caused in the evaporation tank due to too much salt precipitation of the high-concentration brine is avoided.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, specifically to a high-concentration brine evaporation system based on a magnetic pump. Background Technology

[0002] The boiling point of a medium varies under different pressures. Under low pressure or even vacuum, the boiling point of water decreases, making it easier to evaporate at low temperatures. Evaporators are devices based on this principle that concentrate and reduce the discharge of wastewater or concentrate and purify liquids to be treated. Vacuum evaporators are important chemical equipment. Vacuum evaporation is an evaporation operation performed under vacuum. Under low pressure, the boiling point of the solution decreases, and a large amount of water is evaporated with less vapor. It can be used to treat heat-sensitive materials that are easily decomposed at high temperatures and is commonly used for product separation and concentration. It is widely used in wastewater treatment, pharmaceutical equipment, and other industrial applications.

[0003] The applicant found some existing technologies that can evaporate and concentrate high-concentration brine. However, salt will precipitate during the concentration process of high-concentration brine. If salt precipitation is carried out in the evaporation tank, the tank is prone to structural damage. Excessive salt precipitation will affect the subsequent evaporation and concentration process. Based on this, this utility model provides a high-concentration brine evaporation system based on a magnetic pump that can discharge the feed liquid in a timely and stable manner to precipitate salt. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-concentration brine evaporation system based on a magnetic pump, thereby solving the technical problem that the evaporation and concentration of high-concentration brine in the tank can easily lead to structural damage within the tank.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A high-concentration brine evaporation system based on a magnetic pump includes:

[0007] An evaporator is provided with a raw liquid inlet. The liquid outlet of the evaporator is connected to the liquid inlet of a shell-and-tube heat exchanger. The liquid outlet of the shell-and-tube heat exchanger is connected to the liquid inlet of the evaporator. The connecting pipeline between the liquid outlet of the shell-and-tube heat exchanger and the liquid inlet of the evaporator is connected to a centrifuge. A circulation pump is provided on the connecting pipeline.

[0008] The refrigerant heat exchanger has its refrigerant outlet connected to the refrigerant inlet of the tube heat exchanger via a compressor, the refrigerant outlet of the tube heat exchanger connected to the refrigerant inlet of the refrigerant heat exchanger, and the steam outlet of the evaporator connected to the steam inlet of the refrigerant heat exchanger.

[0009] A water storage tank is connected to the steam outlet of a refrigerant heat exchanger, and a vacuum assembly is installed on the connecting pipeline between the two; and

[0010] The relay tank is connected to the water storage tank and the steam outlet of the refrigerant heat exchanger via a connecting pipe. A circulation pipeline is formed between the relay tank and the circulation pump, and a magnetic pump is installed on the circulation pipeline.

[0011] As a further embodiment of this utility model: the relay tank is connected to the circulation pump through an input pipeline for inputting cooling water into the circulation pump, and the relay tank is connected to the circulation pump through an output pipeline for outputting the heat-exchanged cooling water into the relay tank.

[0012] As a further embodiment of this utility model: an intermediate tank is provided between the refrigerant heat exchanger and the vacuum assembly, and the inlet of the relay tank is connected to the intermediate tank.

[0013] As a further embodiment of this utility model, a baffle is provided between the inlet and outlet of the intermediate tank.

[0014] As a further aspect of this invention, a liquid level sensor is installed inside the intermediate tank.

[0015] The beneficial effects of this utility model are:

[0016] (1) In this utility model, the steam generated in the evaporator is input into the refrigerant heat exchanger for heat exchange, and finally enters the water storage tank through the vacuum component to condense into water. The flowing steam is mixed with some condensate, which enters the relay tank and is stored. After the magnetic pump works, a circulation pipeline is formed between the relay tank and the circulation pump, which allows the mechanical seal water of the circulation pump to circulate, serving the circulation pump and making its operation more stable. The work of the circulation pump makes the high-concentration brine circulate between the evaporator and the shell and tube heat exchanger, which can effectively avoid the problem of excessive salt precipitation and impurity deposition at the bottom of the evaporator due to excessive salt precipitation of high-concentration brine. This improves the stability of the system and realizes the stable and timely discharge of high-concentration brine for salt separation, avoiding the problem of excessive precipitation and scale buildup inside the evaporator due to excessive salt precipitation.

[0017] (2) In this utility model, the intermediate tank can be used to separate the flowing steam into liquid and gas, fully collect the condensate of the steam in the vacuum environment, and then use the collected condensate to cool the circulating pump with a mechanical seal, thereby improving the stability of the evaporation system.

[0018] (3) In this utility model, when the water level in the intermediate tank reaches the threshold, it is drained to avoid the problem of excessive condensate stored in it and the water level being too high, which would cause steam to carry water back through the intermediate tank. It also facilitates the reuse of condensate. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0021] In the diagram: 1. Evaporator; 2. Shell and tube heat exchanger; 3. Circulating pump; 4. Refrigerant heat exchanger; 5. Compressor; 6. Water storage tank; 7. Vacuum assembly; 8. Intermediate tank; 9. Relay tank; 10. Input pipeline; 11. Output pipeline; 12. Magnetic pump. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 As shown, this utility model is a high-concentration brine evaporation system based on a magnetic pump, comprising:

[0024] An evaporator 1 is provided with a raw liquid inlet. The liquid outlet of the evaporator 1 is connected to the liquid inlet of the shell-and-tube heat exchanger 2. The liquid outlet of the shell-and-tube heat exchanger 2 is connected to the liquid inlet of the evaporator 1. The connecting pipeline between the liquid outlet of the shell-and-tube heat exchanger 2 and the liquid inlet of the evaporator 1 is connected to a centrifuge. A circulation pump 3 is provided on the connecting pipeline.

[0025] The refrigerant heat exchanger 4 has its refrigerant outlet connected to the refrigerant inlet of the tube heat exchanger 2 via the compressor 5. The refrigerant outlet of the tube heat exchanger 2 is connected to the refrigerant inlet of the refrigerant heat exchanger 4. The steam outlet of the evaporator 1 is connected to the steam inlet of the refrigerant heat exchanger 4.

[0026] A water storage tank 6 is connected to the steam outlet of a refrigerant heat exchanger 4, and a vacuum assembly 7 is installed on the connecting pipeline between the two; and

[0027] The relay tank 9 is connected to the water storage tank 6 and the steam outlet of the refrigerant heat exchanger 4 via a connecting pipe. The relay tank 9 and the circulating pump 3 form a circulating pipe, and a magnetic pump 12 is installed on the circulating pipe.

[0028] In one embodiment, the vacuum component 7 can be a vacuum centrifugal pump or a water ring vacuum component, as long as a negative pressure environment can be achieved. This embodiment does not impose any specific limitations.

[0029] In practical application, this embodiment uses vacuum assembly 7 to create a negative pressure environment within the evaporator 1, tube heat exchanger 2, and refrigerant heat exchanger 4. High-concentration brine is input into the evaporator 1, and circulation pump 3 circulates the brine between the evaporator 1 and tube heat exchanger 2. The hot refrigerant, after being processed by compressor 5, enters tube heat exchanger 2 to exchange heat with the high-concentration brine, generating steam and concentrate. The hot refrigerant undergoes a phase change to become liquid refrigerant, which is then input into refrigerant heat exchanger 4 for further heat exchange. The refrigerant after heat exchange is then input into compressor 5 to process the refrigerant before returning to the evaporator 1. This cycle continues for concentration and evaporation. The steam generated in evaporator 1 is input into refrigerant heat exchanger 4 for further heat exchange, and finally, the steam is released through vacuum assembly 7. The condensate in the storage tank 6 is mixed with some of the condensate. This condensate enters the relay tank 9 and is stored. The magnetic pump 12 then creates a circulation pipeline between the relay tank 9 and the circulation pump 3, allowing the mechanical seal water of the circulation pump 3 to circulate and making its operation more stable. The circulation pump 3 also causes the high-concentration brine to circulate between the evaporator 1 and the shell-and-tube heat exchanger 2. This effectively prevents excessive salt precipitation and impurity buildup at the bottom of the evaporator 1, thus improving system stability. It also enables stable and timely discharge of high-concentration brine for salt separation, avoiding excessive salt precipitation and scaling inside the evaporator 1.

[0030] like Figure 1 As shown, in a preferred embodiment of the present invention, the relay tank 9 is connected to the circulation pump 3 through the input pipeline 10 for inputting cooling water to the circulation pump 3, and the relay tank 9 is connected to the circulation pump 3 through the output pipeline 11 for outputting the heat-exchanged cooling water to the relay tank 9.

[0031] In one embodiment, an intermediate tank 8 is provided between the refrigerant heat exchanger 4 and the vacuum assembly 7, and the inlet of the relay tank 9 is connected to the intermediate tank 8; a baffle is provided between the inlet and outlet of the intermediate tank 8.

[0032] In practical applications, the intermediate tank 8 in this embodiment can perform gas-liquid separation of the flowing steam, fully collect the condensate of the steam in the vacuum environment, and then use the collected condensate to cool the circulating pump 3 with a mechanical seal, thereby improving the stability of the evaporation system.

[0033] like Figure 1 As shown in the preferred embodiment of this utility model, a liquid level sensor is provided inside the intermediate tank 8.

[0034] In practical applications, when the water level in the intermediate tank 8 reaches the threshold, it is drained to prevent excessive condensate from being stored inside and the water level from being too high, which could cause steam to carry water back through the intermediate tank 8. This also facilitates the reuse of condensate.

[0035] The working principle of this utility model is as follows: In the above embodiments, this utility model provides a high-concentration brine evaporation system based on a magnetic pump. The steam generated in the evaporator 1 is input into the refrigerant heat exchanger 4 for heat exchange, and finally enters the water storage tank 6 through the vacuum component 7 to condense into water. The flowing steam carries some condensate, which enters the relay tank 9 and is stored. The magnetic pump 12 performs work to form a circulation pipeline between the relay tank 9 and the circulation pump 3, which allows the mechanical seal water of the circulation pump 3 to circulate, making its operation more stable. The work of the circulation pump 3 causes the high-concentration brine to circulate between the evaporator 1 and the shell and tube heat exchanger 2, which can effectively avoid the problem of excessive salt precipitation and impurity deposition at the bottom of the evaporator 1 due to the excessive precipitation of high-concentration brine. This improves the stability of the system and achieves stable and timely discharge of high-concentration brine for salt separation, avoiding the problem of excessive precipitation and scaling inside the evaporator 1.

[0036] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A high-concentration brine evaporation system based on a magnetic pump, characterized in that, include: An evaporator (1) is provided with a raw liquid inlet. The liquid outlet of the evaporator (1) is connected to the liquid inlet of the shell-and-tube heat exchanger (2). The liquid outlet of the shell-and-tube heat exchanger (2) is connected to the liquid inlet of the evaporator (1). The connecting pipe between the liquid outlet of the shell-and-tube heat exchanger (2) and the liquid inlet of the evaporator (1) is connected to a centrifuge. A circulation pump (3) is provided on the connecting pipe. The refrigerant heat exchanger (4) has its refrigerant outlet connected to the refrigerant inlet of the tube heat exchanger (2) via the compressor (5), the refrigerant outlet of the tube heat exchanger (2) is connected to the refrigerant inlet of the refrigerant heat exchanger (4), and the steam outlet of the evaporator (1) is connected to the steam inlet of the refrigerant heat exchanger (4). A water storage tank (6) is connected to the steam outlet of a refrigerant heat exchanger (4), and a vacuum assembly (7) is installed on the connecting pipe between the two; and The relay tank (9) is connected to the water storage tank (6) and the steam outlet of the refrigerant heat exchanger (4) via a connecting pipe. The relay tank (9) forms a circulation pipeline with the circulation pump (3), and a magnetic pump (12) is installed on the circulation pipeline.

2. The high-concentration brine evaporation system based on a magnetic pump according to claim 1, characterized in that, The relay tank (9) is connected to the circulation pump (3) through the input pipe (10) for inputting cooling water into the circulation pump (3). The relay tank (9) is connected to the circulation pump (3) through the output pipe (11) for outputting the heat-exchanged cooling water into the relay tank (9).

3. The high-concentration brine evaporation system based on a magnetic pump according to claim 1, characterized in that, An intermediate tank (8) is provided between the refrigerant heat exchanger (4) and the vacuum assembly (7), and the inlet of the relay tank (9) is connected to the intermediate tank (8).

4. A high-concentration brine evaporation system based on a magnetic pump according to claim 3, characterized in that, A baffle is provided between the inlet and outlet of the intermediate tank (8).

5. A high-concentration brine evaporation system based on a magnetic pump according to claim 3, characterized in that, A liquid level sensor is installed inside the intermediate tank (8).

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