Lithium bromide unit low-temperature water energy-saving circulating system

Abstract

The utility model provides a lithium bromide unit low-temperature water energy-saving circulating system, which relates to the technical field of lithium bromide units and comprises a lithium bromide unit, a gas distributor, a cold utilization device, a low-temperature water circulating pump, a low-level water tank and a high-level water tank. The output end of the low-temperature water inlet pipe is connected with a lithium bromide unit, a low-temperature water outlet of the lithium bromide unit is connected with a low-temperature water outlet pipe, and the output end of the low-temperature water outlet pipe is connected with a gas distributor; in the low-temperature water circulation period, low-temperature water return water of cooling equipment directly enters the low-temperature water circulation pump and is conveyed to the lithium bromide unit, a low-temperature water outlet pipe of the unit is connected with the gas distributor, and condensed gas can be discharged into the high-level water tank through the gas distributor and the exhaust pipe and is discharged out of the system, so that the condition of abnormal pressure of the circulation system is prevented; air binding of the low-temperature water circulating pump is avoided, safe operation of production is guaranteed, pump operation power is saved, and the electricity-saving effect is obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium bromide units, in particular to a low-temperature water energy-saving circulation system of a lithium bromide unit. Background Art

[0002] Adopting desalted water low-temperature cold carrier cooling technology, gas phase pressure catalytic synthesis-distillation produces carbon disulfide and dimethyl sulfide, and other sulfur chemical products. The low-temperature circulating water process during production is (closed loop): low-temperature circulating pump outlet → lithium bromide unit (cooling unit) → crude refining condenser (using cold unit) → return water main pipe → low-temperature circulating pump inlet; the circulation path of the low-temperature water system during self-water replenishment and degassing is: circulating pump outlet → lithium bromide unit (cooling unit) → gas separator (degassing equipment) → degassing main pipe → high-level water tank → water replenishment main pipe → circulating pump inlet;

[0003] The average nominal diameter of the low-temperature water circulation pipeline is DN300, and the low-temperature water circulation volume is 400m 3 / h~600m 3 / h, the average flow rate of low-temperature water in the low-temperature water circulation pipe is between 1.8m / s and 2.0m / s. The average temperature of low-temperature water during production is about 7°C. Low-temperature return water enters from the top of the low-level water tank and maintains a certain liquid level. Low-temperature water enters the low-temperature circulation water pump from the bottom of the low-level water tank and enters the lithium bromide unit for cooling; the inlet pressure drop loss of the low-temperature circulation water pump in this process is about 15-18m, resulting in energy loss and energy waste of the low-temperature circulation water pump. Therefore, the utility model proposes a low-temperature water energy-saving circulation system for a lithium bromide unit to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a low-temperature water energy-saving circulation system for a lithium bromide unit, which prevents abnormal pressure in the circulation system and avoids air binding of the low-temperature water circulation pump, thereby ensuring safe operation of production, while saving pump operating power and having obvious electricity saving effects.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a lithium bromide unit low-temperature water energy-saving circulation system, including a lithium bromide unit, a gas distributor, a cold-using device, a low-temperature water circulation pump, a low-level water tank and a high-level water tank, the output end of the low-temperature water circulation pump is connected to a low-temperature water inlet pipe, and the output end of the low-temperature water inlet pipe is connected to the lithium bromide unit, the low-temperature water outlet of the lithium bromide unit is connected to a low-temperature water outlet pipe, and the output end of the low-temperature water outlet pipe is connected to the gas distributor, the low-temperature water outlet of the gas distributor is connected to a low-temperature water discharge pipe, and the output end of the low-temperature water discharge pipe is connected to the cold-using device, the discharge end of the cold-using device is connected to a low-temperature water return pipe, and the output end of the low-temperature water return pipe is connected to the input end of the low-temperature water circulation pump;

[0006] A connecting pipe is connected between the lower end of the high-level water tank and the low-temperature water return pipe, an exhaust pipe is connected between the exhaust port of the gas distributor and the upper end of the high-level water tank, the low-temperature water return pipe is connected to the first pipe and the second pipe, and the low-level water tank is connected between the first pipe and the second pipe.

[0007] A further improvement is that the low-temperature water circulation pump, the lithium bromide unit, the gas distributor and the refrigeration equipment are connected in series.

[0008] A further improvement is that a steam inlet and a condensate outlet are provided on one side of the lithium bromide unit, and a circulating water inlet and a circulating water outlet are provided on the other side of the lithium bromide unit.

[0009] A further improvement is that an overflow port is provided above one side of the high-level water tank, and an exhaust port and a water replenishment port are provided at the top of the high-level water tank.

[0010] A further improvement is that a liquid level alarm is provided on one side of the high-level water tank, and a liquid level meter is provided on the other side of the high-level water tank, and the signal output end of the liquid level meter is electrically connected to the liquid level alarm.

[0011] A further improvement is that one end of the first pipe away from the low-temperature water return pipe is connected to the lower side of the low-level water tank, and one end of the second pipe away from the low-temperature water return pipe is connected to the top of the low-level water tank.

[0012] A further improvement is that valves are provided on the first pipeline, the second pipeline, and the low-temperature water return pipe at a position between the first pipeline and the second pipeline.

[0013] A further improvement is that a low-temperature water filter is provided on the low-temperature water return pipe.

[0014] The beneficial effects of the utility model are:

[0015] 1. During the low-temperature water circulation period, the utility model uses the low-temperature water return water of the cooling equipment to directly enter the low-temperature water circulation pump and transport it to the lithium bromide unit. The low-temperature water outlet pipe of the unit is connected to the gas separator. The condensed gas can be discharged into the high-level water tank through the gas separator and the exhaust pipe and discharged outside the system, thereby preventing the occurrence of abnormal pressure in the circulation system, avoiding air binding of the low-temperature water circulation pump, ensuring the safe operation of production, and saving the pump operating power and electricity saving effect.

[0016] 2. The high-level water tank of the utility model is provided with a liquid level alarm and a liquid level gauge, which can monitor the internal liquid level at any time. The bottom of the high-level water tank is connected to the low-temperature water return pipe through a connecting pipe, so as to realize the automatic replenishment of the circulating medium of the low-temperature water circulation system and ensure the inlet kinetic energy of the low-temperature water circulation pump at the same time, making it more reliable to use.

[0017] 3. The utility model can adjust the low-level water tank or use the return water supply of the cold equipment through the switching of the valves on the first pipeline and the second pipeline, change the inlet pipeline of the low-temperature water circulation pump, and filter the water with the low-temperature water filter, with diversified functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model.

[0019] Among them: 1. Lithium bromide unit; 2. Gas distributor; 3. Refrigeration equipment; 4. Low-temperature water circulation pump; 5. Low-level water tank; 6. High-level water tank; 7. Low-temperature water inlet pipe; 8. Low-temperature water outlet pipe; 9. Low-temperature water discharge pipe; 10. Low-temperature water return pipe; 11. Connecting pipe; 12. Exhaust pipe; 13. First pipeline; 14. Steam inlet; 15. Condensate outlet; 16. Circulating water inlet; 17. Circulating water outlet; 18. Overflow port; 19. Exhaust port; 20. Water replenishment port; 21. Liquid level alarm; 22. Liquid level meter; 23. Second pipeline; 24. Valve; 25. Low-temperature water filter. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0021] Embodiment 1

[0022] according to Figure 1 As shown, this embodiment proposes a low-temperature water energy-saving circulation system for a lithium bromide unit, comprising a lithium bromide unit 1, a gas distributor 2, a cooling device 3, a low-temperature water circulation pump 4, a low-level water tank 5 and a high-level water tank 6, the output end of the low-temperature water circulation pump 4 is connected to a low-temperature water inlet pipe 7, and the output end of the low-temperature water inlet pipe 7 is connected to the lithium bromide unit 1, the low-temperature water outlet of the lithium bromide unit 1 is connected to a low-temperature water outlet pipe 8, and the output end of the low-temperature water outlet pipe 8 is connected to the gas distributor 2, the low-temperature water outlet of the gas distributor 2 is connected to a low-temperature water discharge pipe 9, and the output end of the low-temperature water discharge pipe 9 is connected to the cooling device 3, the discharge end of the cooling device 3 is connected to a low-temperature water return pipe 10, and the output end of the low-temperature water return pipe 10 is connected to the input end of the low-temperature water circulation pump 4;

[0023] A connecting pipe 11 is connected between the lower end of the high-level water tank 6 and the low-temperature water return pipe 10, an exhaust pipe 12 is connected between the exhaust port of the gas distributor 2 and the upper end of the high-level water tank 6, the low-temperature water return pipe 10 is connected to a first pipe 13 and a second pipe 23, and the low-level water tank 5 is connected between the first pipe 13 and the second pipe 23.

[0024] The low-temperature water circulation pump 4 is connected in series with the lithium bromide unit 1, the gas distributor 2, and the cooling equipment 3 through pipelines to form a closed circulation loop. The bottom of the high-temperature water tank 6 is connected to the inlet of the low-temperature water circulation pump 4 through a pipeline, and the gas distributor 2 is connected to the top of the high-level water tank 6 through a pipeline. The gas distributor 2 is made of stainless steel and has a volume of 0.5m 3 , pressure resistance 0.6MPa, the top of the gas distributor 2 is connected to the 2m 3 The top of the high-level water tank 6 is connected, and the side of the gas separator 2 is connected to the cold equipment 3 through a pipeline. The low-temperature water first passes through the lithium bromide unit 1. After cooling, the circulation volume of the low-temperature water is reduced, and a small amount of gas can smoothly enter the high-level water tank 6 from the gas separator 2 and be discharged to the outside of the system through the high-level water tank 6. This prevents the occurrence of abnormal pressure in the circulation system, avoids air binding of the low-temperature water circulation pump 4, and ensures smooth production. The high-level water tank 6 is set at a position higher than the cold equipment 3, and the bottom of the high-level water tank 6 is connected to the inlet pipe of the low-temperature water circulation pump 4 through a pipeline, so as to realize the automatic replenishment of the circulating medium of the low-temperature water circulation system and ensure the inlet kinetic energy of the low-temperature water circulation pump 4.

[0025] The low temperature water circulation pump 4, lithium bromide unit 1, gas distributor 2 and cold equipment 3 are connected in series. One side of the lithium bromide unit 1 is provided with a steam inlet 14 and a condensate outlet 15 for steam entry and condensate discharge, and the other side of the lithium bromide unit 1 is provided with a circulating water inlet 16 and a circulating water outlet 17 for circulating water entry and discharge.

[0026] An overflow port 18 is provided above one side of the high-level water tank 6 for discharging excess water, and an exhaust port 19 and a water replenishment port 20 are provided on the top of the high-level water tank 6. Condensed gas can be discharged into the high-level water tank 6 through the gas separator 2 and the exhaust pipe 12. The exhaust port 19 is used to discharge condensed gas, and the water replenishment port 20 is used to replenish water to the high-level water tank 6.

[0027] A liquid level alarm 21 is provided on one side of the high-level water tank 6, and a liquid level meter 22 is provided on the other side of the high-level water tank 6, and the signal output end of the liquid level meter 22 is electrically connected to the liquid level alarm 21. The liquid level alarm 21 and the liquid level meter 22 are provided on the high-level water tank 6, and the internal liquid level can be monitored at any time. The bottom of the high-level water tank 6 is connected to the low-temperature water return pipe 10 through the connecting pipe 11, so as to realize the automatic replenishment of the circulating medium of the low-temperature water circulation system, and at the same time ensure the inlet kinetic energy of the low-temperature water circulation pump 4, so that it is more reliable to use.

[0028] Embodiment 2

[0029] according to Figure 1As shown, this embodiment proposes a low-temperature water energy-saving circulation system for a lithium bromide unit, comprising a lithium bromide unit 1, a gas distributor 2, a cooling device 3, a low-temperature water circulation pump 4, a low-level water tank 5 and a high-level water tank 6, the output end of the low-temperature water circulation pump 4 is connected to a low-temperature water inlet pipe 7, and the output end of the low-temperature water inlet pipe 7 is connected to the lithium bromide unit 1, the low-temperature water outlet of the lithium bromide unit 1 is connected to a low-temperature water outlet pipe 8, and the output end of the low-temperature water outlet pipe 8 is connected to the gas distributor 2, the low-temperature water outlet of the gas distributor 2 is connected to a low-temperature water discharge pipe 9, and the output end of the low-temperature water discharge pipe 9 is connected to the cooling device 3, the discharge end of the cooling device 3 is connected to a low-temperature water return pipe 10, and the output end of the low-temperature water return pipe 10 is connected to the input end of the low-temperature water circulation pump 4;

[0030] A connecting pipe 11 is connected between the lower end of the high-level water tank 6 and the low-temperature water return pipe 10, an exhaust pipe 12 is connected between the exhaust port of the gas distributor 2 and the upper end of the high-level water tank 6, the low-temperature water return pipe 10 is connected to a first pipe 13 and a second pipe 23, and the low-level water tank 5 is connected between the first pipe 13 and the second pipe 23.

[0031] The low-temperature water circulation pump 4 is connected in series with the lithium bromide unit 1, the gas distributor 2, and the cooling equipment 3 through pipelines to form a closed circulation loop. The bottom of the high-temperature water tank 6 is connected to the inlet of the low-temperature water circulation pump 4 through a pipeline, and the gas distributor 2 is connected to the top of the high-level water tank 6 through a pipeline. The gas distributor 2 is made of stainless steel and has a volume of 0.5m 3 , pressure resistance 0.6MPa, the top of the gas distributor 2 is connected to the 2m 3 The top of the high-level water tank 6 is connected, and the side of the gas separator 2 is connected to the cold equipment 3 through a pipeline. The low-temperature water first passes through the lithium bromide unit 1. After cooling, the circulation volume of the low-temperature water is reduced, and a small amount of gas can smoothly enter the high-level water tank 6 from the gas separator 2 and be discharged to the outside of the system through the high-level water tank 6. This prevents the occurrence of abnormal pressure in the circulation system, avoids air binding of the low-temperature water circulation pump 4, and ensures smooth production. The high-level water tank 6 is set at a position higher than the cold equipment 3, and the bottom of the high-level water tank 6 is connected to the inlet pipe of the low-temperature water circulation pump 4 through a pipeline, so as to realize the automatic replenishment of the circulating medium of the low-temperature water circulation system and ensure the inlet kinetic energy of the low-temperature water circulation pump 4.

[0032] One end of the first pipe 13 away from the low-temperature water return pipe 10 is connected to the lower side of the low-level water tank 5, and one end of the second pipe 23 away from the low-temperature water return pipe 10 is connected to the top of the low-level water tank 5. Valves 24 are provided on the first pipe 13, the second pipe 23, and the low-temperature water return pipe 10 at the position between the first pipe 13 and the second pipe 23. A low-temperature water filter 25 is provided on the low-temperature water return pipe 10. When in use, the low-level water tank 5 can be adjusted or the return water supply of the cooling device 3 can be used by switching the valves on the first pipe 13 and the second pipe 23, changing the inlet pipeline of the low-temperature water circulation pump 4, and filtering the water with the low-temperature water filter 25, and the functions are diversified.

[0033] During the low-temperature water circulation period, the utility model uses the low-temperature water return water of the cold equipment 3 to directly enter the low-temperature water circulation pump 4 and transport it to the lithium bromide unit 1. The low-temperature water outlet pipe 8 of the unit is connected to the gas separator 2. The condensed gas can be discharged into the high-level water tank 6 through the gas separator 2 and the exhaust pipe 12 and discharged outside the system, thereby preventing the abnormal pressure of the circulation system, avoiding the gas binding of the low-temperature water circulation pump 4, ensuring the safe operation of production, and saving the pump operation power and power saving effect. In addition, the high-level water tank 6 is provided with a liquid level alarm 21 and a liquid level meter 22, which can monitor the internal liquid level at any time. The bottom of the high-level water tank 6 is connected to the low-temperature water return pipe 10 through a connecting pipe 11, realizing the automatic replenishment of the circulating medium of the low-temperature water circulation system, and ensuring the inlet kinetic energy of the low-temperature water circulation pump 4, and the use is more reliable. At the same time, this product can adjust the low-level water tank 5 or the return water supply of the cold equipment 3 through the valve switching on the first pipeline 13 and the second pipeline 23, change the inlet pipeline of the low-temperature water circulation pump 4, and cooperate with the low-temperature water filter 25 to filter the water, and the function is diversified.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lithium bromide unit low-temperature water energy-saving circulation system, comprising a lithium bromide unit (1), a gas distributor (2), a cooling device (3), a low-temperature water circulation pump (4), a low-level water tank (5) and a high-level water tank (6), characterized in that: The output end of the low-temperature water circulation pump (4) is connected to a low-temperature water inlet pipe (7), and the output end of the low-temperature water inlet pipe (7) is connected to the lithium bromide unit (1); the low-temperature water outlet of the lithium bromide unit (1) is connected to a low-temperature water outlet pipe (8), and the output end of the low-temperature water outlet pipe (8) is connected to a gas distributor (2); the low-temperature water outlet of the gas distributor (2) is connected to a low-temperature water discharge pipe (9), and the output end of the low-temperature water discharge pipe (9) is connected to a cooling device (3); the discharge end of the cooling device (3) is connected to a low-temperature water return pipe (10), and the output end of the low-temperature water return pipe (10) is connected to the input end of the low-temperature water circulation pump (4); A connecting pipe (11) is connected between the lower end of the high-level water tank (6) and the low-temperature water return pipe (10), an exhaust pipe (12) is connected between the exhaust port of the gas distributor (2) and the upper end of the high-level water tank (6), the low-temperature water return pipe (10) is connected to a first pipe (13) and a second pipe (23), and the low-level water tank (5) is connected between the first pipe (13) and the second pipe (23).

2. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 1, characterized in that: The low-temperature water circulation pump (4), the lithium bromide unit (1), the gas distributor (2) and the cooling equipment (3) are connected in series.

3. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 1, characterized in that: A steam inlet (14) and a condensate outlet (15) are provided on one side of the lithium bromide unit (1), and a circulating water inlet (16) and a circulating water outlet (17) are provided on the other side of the lithium bromide unit (1).

4. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 1, characterized in that: An overflow port (18) is provided above one side of the high-level water tank (6), and an exhaust port (19) and a water replenishment port (20) are provided at the top of the high-level water tank (6).

5. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 4, characterized in that: A liquid level alarm (21) is provided on one side of the high-level water tank (6), and a liquid level meter (22) is provided on the other side of the high-level water tank (6), and a signal output end of the liquid level meter (22) is electrically connected to the liquid level alarm (21).

6. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 1, characterized in that: One end of the first pipe (13) away from the low-temperature water return pipe (10) is connected to the lower side of one side of the low-level water tank (5), and one end of the second pipe (23) away from the low-temperature water return pipe (10) is connected to the top of the low-level water tank (5).

7. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 6, characterized in that: Valves (24) are provided on the first pipeline (13), on the second pipeline (23), and on the low-temperature water return pipe (10) at a position between the first pipeline (13) and the second pipeline (23).

8. A lithium bromide unit low-temperature water energy-saving circulation system according to claim 7, characterized in that: The low-temperature water return pipe (10) is provided with a low-temperature water filter (25).

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