Explosion-proof oil gas recovery condensing unit

Abstract

The utility model relates to an anti-explosion oil gas recovery condensing unit in the field of cryogenic storage equipment. The anti-explosion oil gas recovery condensing unit comprises an anti-explosion water-cooling water chilling unit, an anti-explosion freezing pump, a freezing water tank, a cooling water pump, a cooling water tank, a closed cooling tower or an air cooler and an oil gas heat exchanger. According to the anti-explosion oil-gas recovery condensing unit, through mutual cooperation of the anti-explosion water-cooling water chilling unit, the anti-explosion freezing pump, the freezing water tank, the cooling water pump, the cooling water tank, the closed cooling tower or the air cooler, the oil-gas heat exchangers and the like, circulation of multiple modes of refrigeration and defrosting of the two oil-gas heat exchangers can be achieved, the problem of low-temperature frosting is solved, the refrigeration and heat exchange efficiency is improved, and the energy consumption is reduced. And the stable operation of the system is ensured.

Description

Technical Field

[0001] This utility model relates to an explosion-proof oil and gas recovery condenser unit, and more particularly to a dual-channel oil and gas recovery unit with defrosting function. Background Technology

[0002] Most oil and gas recovery devices on the market use Freon hot defrosting, which is unstable and often results in poor defrosting effect, unsatisfactory cooling effect, and unstable oil and gas recovery intake. This leads to changes in the refrigeration load in the evaporator of the refrigeration system, resulting in unstable operation of the refrigeration system. Over time, this causes the refrigeration compressor to operate under unstable conditions, affecting the refrigeration effect. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an energy-saving, safe, and stable explosion-proof oil and gas recovery condenser unit, which solves the problem of low-temperature frosting.

[0004] This utility model is achieved through the following technical solution:

[0005] An explosion-proof oil-gas recovery condensing unit includes an explosion-proof water-cooled chiller, an explosion-proof refrigeration pump, a chilled water tank, a cooling water pump, a cooling water tank, a closed cooling tower or air cooler, and an oil-gas heat exchanger.

[0006] The explosion-proof water-cooled chiller unit includes an evaporator and a condenser. The inlet end of the evaporator is connected to the outlet end of the chilled water tank via an explosion-proof refrigeration pump. The outlet end of the evaporator is connected to the inlet end of the oil-gas heat exchanger. The inlet end of the condenser is connected to the outlet end of the cooling water tank via a cooling water pump. The outlet end of the condenser is connected to the inlet end of the oil-gas heat exchanger, the inlet end of the chilled water tank, and the inlet end of the cooling water tank, respectively.

[0007] The inlet of the chilled water tank is connected to the outlet of the oil-gas heat exchanger.

[0008] The inlet end of the cooling water tank is connected to the outlet end of the closed cooling tower or air cooler.

[0009] The inlet of the closed cooling tower or air cooler is connected to the outlet of the condenser, the outlet of the evaporator, and the outlet of the oil-gas heat exchanger, respectively.

[0010] In order to achieve two circulation modes, namely refrigeration and defrosting, the oil-gas heat exchanger includes oil-gas heat exchanger A and oil-gas heat exchanger B connected in parallel.

[0011] To enable the switching between cooling and defrosting in oil-gas heat exchangers A and B, a first valve is installed on the connecting pipe between the outlet of the evaporator and the inlet of oil-gas heat exchanger A, and a second valve is installed on the connecting pipe between the outlet of the evaporator and the inlet of oil-gas heat exchanger B. A third valve is installed on the connecting pipe between the outlet of the condenser and the inlet of oil-gas heat exchanger A, a fourth valve is installed on the connecting pipe between the outlet of the condenser and the inlet of a closed-circuit cooling tower or air cooler, and a twelfth valve is installed on the connecting pipe between the outlet of the condenser and the inlet of oil-gas heat exchanger B. A seventh valve is installed on the connecting pipe between the outlet of the condenser and the inlet of the chilled water tank. An eighth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the cooling water tank; an eleventh valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the chilled water tank, and a thirteenth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the cooling water tank; a fifth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A and the inlet end of the closed cooling tower or air cooler, and a sixth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A and the inlet end of the chilled water tank; a tenth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B and the inlet end of the closed cooling tower or air cooler, and a ninth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B and the inlet end of the chilled water tank.

[0012] The beneficial effects of this utility model are: the explosion-proof oil and gas recovery condensing unit, through the cooperation of explosion-proof water-cooled chiller, explosion-proof refrigeration pump, chilled water tank, cooling water pump, cooling water tank, closed cooling tower or air cooler and oil and gas heat exchanger, can realize multiple circulation modes of refrigeration and defrosting of two oil and gas heat exchangers, solve the problem of low temperature frosting, improve refrigeration and heat exchange efficiency, and ensure the stable operation of the system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the explosion-proof oil and gas recovery condenser unit of this utility model. Detailed Implementation

[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0015] like Figure 1The explosion-proof oil-gas recovery condensing unit shown includes an explosion-proof water-cooled chiller unit, an explosion-proof refrigeration pump 18, a chilled water tank 16, a cooling water pump 19, a cooling water tank 17, a closed-circuit cooling tower or air cooler 20, and an oil-gas heat exchanger. The explosion-proof water-cooled chiller unit includes an evaporator 14 and a condenser 15. The oil-gas heat exchanger includes an oil-gas heat exchanger A21 and an oil-gas heat exchanger B22. The closed-circuit cooling tower or air cooler 20 serves as a heat dissipation device. Hot water is output from the condenser 15, and cold water is output from the evaporator 14. The cold water is used to cool the exhaust gas in the oil-gas heat exchanger and to cool the compressor. It is also used to supply hot water for defrosting.

[0016] Specifically, the inlet end of the evaporator 14 is connected to the outlet end of the chilled water tank 16 via an explosion-proof refrigeration pump 18, and the outlet end of the evaporator 14 is connected to the inlet ends of the oil-gas heat exchanger A21 and the oil-gas heat exchanger B22 respectively. A first valve 1 is installed on the connecting pipe between the outlet end of the evaporator 14 and the inlet end of the oil-gas heat exchanger A21, and a second valve 2 is installed on the connecting pipe between the outlet end of the evaporator 14 and the inlet end of the oil-gas heat exchanger B22.

[0017] Specifically, the inlet of the condenser 15 is connected to the outlet of the cooling water tank 17 via a cooling water pump 19. The outlet of the condenser 15 is connected to the inlets of the oil-gas heat exchangers A21 and B22, the inlet of the chilled water tank 16, the inlet of the cooling water tank 17, and the inlet of the closed-loop cooling tower or air cooler 20. A third valve 3 is installed on the connecting pipe between the outlet of the condenser 15 and the inlet of the oil-gas heat exchanger A21, and a fourth valve is installed on the connecting pipe between the outlet of the condenser 15 and the inlet of the closed-loop cooling tower or air cooler 20. A twelfth valve 12 is installed on the connecting pipe between the outlet end of the condenser 15 and the inlet end of the oil-gas heat exchanger B22; a seventh valve 7 is installed on the connecting pipe between the outlet end of the condenser 15 and the inlet end of the chilled water tank 16; an eighth valve 8 is installed on the connecting pipe between the outlet end of the condenser 15 and the inlet end of the cooling water tank 17; an eleventh valve 11 is installed on the connecting pipe between the outlet end of the condenser 15 and the inlet end of the chilled water tank 16; and a thirteenth valve 13 is installed on the connecting pipe between the outlet end of the condenser 15 and the inlet end of the cooling water tank 17.

[0018] Specifically, a fifth valve 5 is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A21 and the inlet end of the closed cooling tower or air cooler 20, and a sixth valve 6 is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A21 and the inlet end of the chilled water tank 16; a tenth valve 10 is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B22 and the inlet end of the closed cooling tower or air cooler 20, and a ninth valve 9 is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B22 and the inlet end of the chilled water tank 16.

[0019] It should be noted that the above valves are made of stainless steel or other solenoid valves that can operate stably under ultra-low temperature conditions of -80℃.

[0020] The unit's operation mainly involves four steps: cooling and defrosting via oil-gas heat exchanger A21, and cooling and defrosting via oil-gas heat exchanger B22. The specific workflow is as follows:

[0021] When in operation, the chilled water pump and cooling water pump start working, and the specific valves open are as follows:

[0022] Refrigeration of oil-gas heat exchanger A: Open the first valve 1 and the sixth valve 6, and chilled water enters the oil-gas heat exchanger A21 from the outlet of the evaporator 14 to cool the oil and gas and perform oil-gas recovery. Open the fourth valve 4, and keep the other valves closed. The cooling water is pumped by the cooling water pump 19 from the cooling water tank 17 to the condenser 15. After passing through the condenser 15, it enters the closed cooling tower or air cooler 20 through the fourth valve 4 for heat dissipation, and then returns to the cooling water tank 17.

[0023] Defrosting of oil-gas heat exchanger A: Open valves 2 and 9, and simultaneously open valves 4 and 7 to begin cooling of oil-gas heat exchanger B22. Open valve 4 for cooling water circulation, and open valve 7 to drain the water inside oil-gas heat exchanger A21. After draining for a period of time, begin normal defrosting of oil-gas heat exchanger A. Close valve 4, open valves 3 and 8, close valve 7, and simultaneously close other valves. After defrosting of oil-gas heat exchanger A21 is complete, close valve 3, open valve 4, and open valve 8 to drain the inside of oil-gas heat exchanger A21. After draining, close valve 8 to begin cooling of oil-gas heat exchanger B22.

[0024] For oil-gas heat exchanger B refrigeration: Open valves 2 and 9, and valve 4; close all other valves.

[0025] Defrosting of oil-gas heat exchanger B: Open valve 1, valve 6, and valve 4, and simultaneously open valve 11. Open valve 11 to purge the contents of oil-gas heat exchanger B22. After purging for a period of time, close valve 4 and valve 11, and open valve 12 and valve 10 to defrost oil-gas heat exchanger B22. After defrosting, open valve 4, close valve 12 and valve 10, and open valve 13 to purge the hot water in the heat exchanger. After purging the heat exchanger, close valve 13 to begin cooling oil-gas heat exchanger A21.

[0026] This cycle of defrosting and cooling is then repeated.

[0027] The embodiments described above are merely examples 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 modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An explosion-proof oil and gas recovery condensing unit, characterized by: This includes explosion-proof water-cooled chillers, explosion-proof chilled water pumps, chilled water tanks, cooling water pumps, cooling water tanks, closed-circuit cooling towers or air coolers, and oil-gas heat exchangers. The explosion-proof water-cooled chiller unit includes an evaporator and a condenser. The inlet end of the evaporator is connected to the outlet end of the chilled water tank via an explosion-proof refrigeration pump. The outlet end of the evaporator is connected to the inlet end of the oil-gas heat exchanger. The inlet end of the condenser is connected to the outlet end of the cooling water tank via a cooling water pump. The outlet end of the condenser is connected to the inlet end of the oil-gas heat exchanger, the inlet end of the chilled water tank, and the inlet end of the cooling water tank, respectively. The inlet of the chilled water tank is connected to the outlet of the oil-gas heat exchanger. The inlet end of the cooling water tank is connected to the outlet end of the closed cooling tower or air cooler. The inlet of the closed cooling tower or air cooler is connected to the outlet of the condenser, the outlet of the evaporator, and the outlet of the oil-gas heat exchanger, respectively.

2. The explosion-proof oil and gas recovery condensing unit of claim 1, wherein: The oil-gas heat exchanger includes oil-gas heat exchanger A and oil-gas heat exchanger B connected in parallel.

3. The explosion-proof oil and gas recovery condensing unit of claim 2, wherein: A first valve is installed on the connecting pipe between the outlet end of the evaporator and the inlet end of the oil-gas heat exchanger A, and a second valve is installed on the connecting pipe between the outlet end of the evaporator and the inlet end of the oil-gas heat exchanger B.

4. The explosion-proof oil and gas recovery condensing unit of claim 3, wherein: A third valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the oil-gas heat exchanger A; a fourth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the closed cooling tower or air cooler; and a twelfth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the oil-gas heat exchanger B.

5. The explosion-proof oil and gas recovery condensing unit of claim 4, wherein: A seventh valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the chilled water tank, and an eighth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the chilled water tank.

6. The explosion-proof oil and gas recovery condensing unit of claim 5, wherein: An eleventh valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the chilled water tank, and a thirteenth valve is installed on the connecting pipe between the outlet end of the condenser and the inlet end of the chilled water tank.

7. The explosion-proof oil and gas recovery condensing unit of claim 6, wherein: A fifth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A and the inlet end of the closed cooling tower or air cooler, and a sixth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger A and the inlet end of the chilled water tank.

8. The explosion-proof oil and gas recovery condensing unit of claim 7, wherein: A tenth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B and the inlet end of the closed cooling tower or air cooler, and a ninth valve is installed on the connecting pipe between the outlet end of the oil-gas heat exchanger B and the inlet end of the chilled water tank.

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