Device for discharging oil-water mixture at outlet of hydrogen compressor

Abstract

The utility model discloses a device for discharging an oil-water mixture at an outlet of a hydrogen compressor, which is characterized in that a hydrogen pressure gauge and a liquid level meter are arranged on a separator, and a buffer tank pressure gauge is arranged on a buffer tank; a first liquid discharge electromagnetic valve is mounted on the pipeline between the separator and the buffer tank, a second liquid discharge electromagnetic valve is mounted on the liquid discharge pipe, a nitrogen electromagnetic valve is mounted on the nitrogen inlet pipe, and an emptying electromagnetic valve is mounted on the emptying pipe. The buffer tank is additionally arranged for collecting oil and water, the buffer tank is filled with nitrogen which is far lower than the pressure of the separator, after the pressure of the buffer tank rises and the separator has no liquid level, connection between the separator and the buffer tank is cut off, gas is discharged, and then a gas-liquid mixture is discharged. And the risk of fire and explosion accidents caused by high-pressure hydrogen escaping during oil-water mixture discharge is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor field, concretely relates to a hydrogen compressor export oil -water mixture device. BACKGROUND

[0002] In BDO (1,4-butanediol) production, hydrogen is generated in the wet acetylene process, and then is sent to the synthesis process by compressor for pressure boosting to synthesize BDO with BYD (1,4-butynediol). Since the outlet pressure of the second stage of hydrogen compressor is 17-20 MPa, and the outlet pressure of the third stage is 29-31 MPa, part of the organic matter and water will be liquefied in the compression process. However, water content in hydrogen should be avoided in the synthesis of BDO. Therefore, a separator is arranged at the outlet of the second stage and the outlet of the third stage of the compressor to separate the mixed oil-water mixture. The oil-water mixture separated by the separator needs to be discharged frequently. When discharging the oil-water, the bottom gate valve and stop valve of the separator are opened to discharge the liquid. However, it is difficult to accurately determine whether the oil-water mixture in the separator is completely discharged or not. In addition, if a large amount of hydrogen is discharged from the bottom of the separator, frictional heat is generated, which can easily cause fire or explosion accidents. SUMMARY

[0003] The utility model discloses a hydrogen compressor export oil -water mixture device.

[0004] The utility model discloses the following technical scheme:

[0005] A hydrogen compressor export oil -water mixture device, comprising a separator, the gas inlet of the separator is connected with a hydrogen inlet pipe, the gas outlet of the separator is connected with a hydrogen outlet pipe, the liquid outlet of the separator is connected with the liquid inlet of a buffer tank through a pipeline, and the liquid outlet of the buffer tank is connected with a liquid discharge pipe; the top of the buffer tank is further connected with a nitrogen inlet pipe and a vent pipe;

[0006] A hydrogen pressure gauge and a liquid level meter are installed on the separator, and a buffer tank pressure gauge is installed on the buffer tank; a first liquid discharge solenoid valve is installed on the pipeline between the separator and the buffer tank, a second liquid discharge solenoid valve is installed on the liquid discharge pipe, a nitrogen solenoid valve is installed on the nitrogen inlet pipe, and a vent solenoid valve is installed on the vent pipe;

[0007] The signal output ends of the hydrogen pressure gauge, the liquid level meter and the buffer tank pressure gauge are electrically connected with the signal input end of a controller, and the signal output end of the controller is connected with the signal input ends of the first liquid discharge solenoid valve, the second liquid discharge solenoid valve, the nitrogen solenoid valve and the vent solenoid valve respectively.

[0008] Preferably, a pressure regulating valve is further arranged on the nitrogen inlet pipe, and the pressure regulating valve is electrically connected with the signal output end of the controller.

[0009] The utility model discloses a advantage: through increasing buffer tank for collecting oil water, and in the buffer tank fills nitrogen gas below the pressure of separator, after buffer tank pressure rises, separator no liquid level, cut off the connection of separator and buffer tank again, after discharging gas, discharges gas-liquid mixture again, greatly reduces the risk of high-pressure hydrogen gas out of fire, explosion accident when discharging oil water mixture. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is the structure schematic diagram of the utility model;

[0011] Fig. 2 It is the control principle schematic diagram of the utility model.

[0012] In the drawing: separator 1, hydrogen gas inlet pipe 2, hydrogen gas outlet pipe 3, buffer tank 4, liquid discharge pipe 5, nitrogen gas inlet pipe 6, emptying pipe 7, hydrogen gas pressure gauge 8, liquid level meter 9, buffer tank pressure gauge 10, first liquid discharge solenoid valve 11, second liquid discharge solenoid valve 12, nitrogen gas solenoid valve 13, emptying solenoid valve 14, controller 15, pressure regulating valve 16. DETAILED DESCRIPTION

[0013] As Figs. 1-2 Shown, a kind of hydrogen compressor outlet oil water mixture device, including separator 1, the air inlet of separator 1 is connected with hydrogen gas inlet pipe 2, the exhaust port of separator 1 is connected with hydrogen gas outlet pipe, the liquid inlet of the buffer tank 4 is connected with the liquid discharge port of separator 1 by pipeline, the liquid discharge port of buffer tank 4 is connected with liquid discharge pipe 5;Buffer tank 4 top is also connected with nitrogen gas inlet pipe 6 and emptying pipe 7;

[0014] Hydrogen gas pressure gauge 8 and liquid level meter 9 are installed on separator 1, buffer tank pressure gauge 10 is installed on buffer tank 4;First liquid discharge solenoid valve 11 is installed on the pipeline between separator 1 and buffer tank 4, second liquid discharge solenoid valve 12 is installed on liquid discharge pipe 5, nitrogen gas solenoid valve 13 is installed on nitrogen gas inlet pipe 6, emptying solenoid valve 14 is installed on emptying pipe 7;

[0015] The signal output end of hydrogen gas pressure gauge 8, liquid level meter 9 and buffer tank pressure gauge 10 is electrically connected with the signal input end of controller 15, the signal output end of controller 15 is connected with the signal input end of first liquid discharge solenoid valve 11, second liquid discharge solenoid valve 12, nitrogen gas solenoid valve 13 and emptying solenoid valve 14 respectively;

[0016] In production, the hydrogen compressed by the compressor is sent into the separator 1 from the hydrogen inlet pipe 2, the hydrogen therein is sent to the next process from the hydrogen outlet pipe at the top, and the mixed oil-water mixture falls to the bottom of the separator 1; the liquid level meter 9 detects the liquid level of the oil-water mixture in the separator 1 and sends a signal to the controller 15, when the liquid level of the separator 1 reaches the pre-warning liquid level, i.e. 12%, the controller 15 controls the nitrogen electromagnetic valve 13 and the emptying electromagnetic valve 14 to open, the nitrogen is sent into the buffer tank 4 from the nitrogen inlet pipe 6, and the excess air and other gases in the buffer tank 4 are discharged from the emptying pipe 7; at the same time, the hydrogen pressure gauge 8 is used to detect the hydrogen pressure in the separator 1 and sends a signal to the controller 15, and the buffer tank pressure gauge 10 is used to detect the hydrogen pressure in the buffer tank 4 and sends a signal to the controller 15, so as to ensure that the pressure in the buffer tank 4 is lower than the pressure in the separator 1, i.e. 10 MPa, if it is within 10 MPa, the controller 15 controls the nitrogen electromagnetic valve 13 to close, and the emptying electromagnetic valve 14 to open, if the pressure in the buffer tank 4 is higher than the pressure in the separator 1, i.e. 15 MPa, the controller 15 controls the nitrogen electromagnetic valve 13 to open, and continues to inject nitrogen; when the liquid level meter 9 detects that the liquid level in the separator 1 reaches the maximum, i.e. 15%, the controller 15 controls the nitrogen electromagnetic valve 13 to close, the emptying electromagnetic valve 14 to close, and the first liquid discharge electromagnetic valve 11 to open, under the action of the pressure difference, the oil-water mixture in the separator 1 quickly enters the buffer tank 4, when the liquid level meter 9 detects that the liquid level in the separator 1 is 0%, the controller 15 controls the first liquid discharge electromagnetic valve 11 to close, and the emptying pipe 7 to open, so as to discharge the high-pressure gas therein, and the discharged gas is a mixture of nitrogen and a small amount of hydrogen; after the buffer tank pressure gauge 10 detects that the buffer tank pressure gauge 10 decreases to 0.3 MPa, the controller 15 controls the emptying pipe 7 to close, and the second liquid discharge electromagnetic valve 12 to open, so as to send the oil-water mixture therein to the water treatment system.

[0017] During the whole oil-water mixture discharging process, the buffer tank 4 is used to collect the oil-water mixture, and the nitrogen with a pressure far lower than that of the separator 1 is filled in the buffer tank 4, after the pressure of the buffer tank 4 rises and the separator 1 is empty, the connection between the separator 1 and the buffer tank 4 is cut off, the gas is discharged, and then the gas-liquid mixture is discharged, so that the risk of fire and explosion accidents caused by the high-pressure hydrogen gas leaking out during the oil-water mixture discharging process is greatly reduced.

[0018] The nitrogen inlet pipe 6 is further provided with a pressure regulating valve 16, the pressure regulating valve 16 is electrically connected with the signal output end of the controller 15, and during the process of regulating the pressure in the buffer tank 4 to be lower than the pressure in the separator 1 by 10 MPa, the pressure regulating valve 16 can be adjusted to quickly increase or decrease the pressure.

[0019] The above merely describes the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydrogen compressor outlet oil-water mixture device, characterized by, The separator is connected with the hydrogen inlet pipe at the air inlet, connected with the hydrogen outlet pipe at the air outlet, connected with the liquid inlet of the buffer tank at the liquid outlet through the pipeline, and connected with the liquid outlet pipe at the liquid outlet of the buffer tank. The hydrogen pressure gauge, the liquid level gauge and the buffer tank pressure gauge are installed on the separator and the buffer tank respectively. The signal output ends of the hydrogen pressure gauge, the liquid level gauge and the buffer tank pressure gauge are electrically connected with the signal input end of the controller, and the signal output end of the controller is connected with the signal input ends of the first liquid outlet electromagnetic valve, the second liquid outlet electromagnetic valve, the nitrogen electromagnetic valve and the emptying electromagnetic valve respectively.

2. A hydrogen compressor outlet oil-water mixture device according to claim 1, characterized in that, The nitrogen inlet pipe is further provided with a pressure regulating valve, and the pressure regulating valve is electrically connected with the signal output end of the controller.

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