Purifying device for air discharged from compressor

Abstract

The utility model relates to an air purification device for a compressor, and belongs to the field of compressor equipment. Comprising a cryogenic heat exchanger and a separation tank, a shell pass inlet of the cryogenic heat exchanger is connected with a compressor nitrogen sealing emptying pipeline, and a shell pass outlet of the cryogenic heat exchanger is connected with the upper middle portion of the separation tank; an emergency emptying pipeline is arranged at the top of a shell pass of the cryogenic heat exchanger, a separation tank emptying line is arranged at the top of the separation tank, and the separation tank emptying line is connected behind an emergency emptying control valve; the separation tank is provided with a liquid level meter, the bottom of the separation tank is provided with a recovery line and a separation tank bottom valve, the recovery line is connected with a recovery pump, the recovery pump is connected with a gasifier, and the gasifier is connected with an inlet pipeline of the compressor. According to the utility model, compressed materials are effectively recycled, and the peculiar smell of field exhaust gas is reduced.

Description

Technical Field

[0001] The utility model relates to a compressor air purification device, belonging to the field of compressor equipment. Background Art

[0002] During the current operation of the compressor, due to the sealing effect of the sealing ring and the operating time, some compressed materials are injected into the nitrogen sealing side. Due to the properties of the compressed materials, the nitrogen venting cannot be incorporated into the torch and can only be discharged on site, resulting in odor in the venting and material loss. Summary of the Invention

[0003] According to the background problem, the problem to be solved by the present invention is:

[0004] The compressed material enters the nitrogen-sealed side, causing odor in the vent and material loss.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A compressor exhaust air purification device comprises a cryogenic heat exchanger and a separation tank, wherein the shell inlet of the cryogenic heat exchanger is connected to the compressor nitrogen sealing vent line and is provided with a cryogenic heat exchanger inlet valve, and the shell outlet of the cryogenic heat exchanger is connected to the upper middle part of the separation tank and is provided with a cryogenic heat exchanger outlet valve; the top of the cryogenic heat exchanger shell is provided with an emergency vent line and an emergency vent control valve, the top of the separation tank is provided with a separation tank vent line and a separation tank vent valve, and the separation tank air defense line is connected to the emergency vent control valve; the separation tank is provided with a liquid level gauge, the bottom of the separation tank is provided with a recovery line and a separation tank bottom valve, the recovery line is connected to a recovery pump, the recovery pump is connected to a vaporizer, and the vaporizer is connected to the compressor inlet pipeline.

[0007] Preferably, the gasifier may be a static gasifier or a steam gasifier.

[0008] Preferably, the tube side of the cryogenic heat exchanger is chilled brine.

[0009] Preferably, the separation tank body is further provided with a liquid level gauge, and the liquid level gauge is electrically connected to the recovery pump.

[0010] The separation tank and recovery pump must be kept cold to prevent the loss of cooling capacity provided by the cryogenic heat exchanger. This could lead to the compressed material re-vaporizing and mixing with the seal gas, rendering the device ineffective. The temperature of the chilled brine in the cryogenic heat exchanger tubes should be selected based on the properties of the compressed material. Depending on the actual operating conditions, a static vaporizer or steam vaporizer should be used.

[0011] The nitrogen vent air from the compressor is cooled through a cryogenic heat exchanger, the material is liquefied, and separated in a separation tank. The liquid at the bottom of the separation tank is transported to the vaporizer through a recovery pump, and after vaporization, it is recovered to the compressor inlet to recover the material; the gas at the top of the separation tank is discharged on-site, and the compressed material in the discharge gas is greatly reduced, so the odor is greatly reduced.

[0012] The beneficial effects of the utility model are:

[0013] The utility model effectively recovers compressed materials and reduces the odor of exhaust gas on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 for

[0015] In the figure: 1 is the compressor; 2 is the cryogenic heat exchanger; 3 is the separation tank; 4 is the recovery pump; 5 is the vaporizer; 11 is the compressor inlet pipeline; 21 is the cryogenic heat exchanger inlet valve; 22 is the cryogenic heat exchanger outlet valve; 23 is the emergency vent control valve; 31 is the separation tank vent valve; 32 is the separation tank bottom valve; 33 is the liquid level gauge. DETAILED DESCRIPTION

[0016] Example 1

[0017] A compressor exhaust air purification device includes a cryogenic heat exchanger 2 and a separation tank 3, wherein the shell side inlet of the cryogenic heat exchanger 2 is connected to the nitrogen sealed venting pipeline of the compressor 1 and is provided with a cryogenic heat exchanger inlet valve 21, and the shell side outlet of the cryogenic heat exchanger 2 is connected to the upper and middle part of the separation tank 3 and is provided with a cryogenic heat exchanger outlet valve 22; an emergency venting pipeline is provided at the top of the shell side of the cryogenic heat exchanger 2 and an emergency venting control valve 23 is provided, and a separation tank venting line is provided at the top of the separation tank 3 and a separation tank venting valve 31 is provided, and the separation tank air defense line is connected to the emergency venting control valve 23; a recovery line is provided at the bottom of the separation tank 3 and a separation tank bottom valve 32 is provided, the recovery line is connected to a recovery pump 4, the recovery pump 4 is connected to a vaporizer 5, and the vaporizer 5 is connected to the compressor inlet pipeline 11.

[0018] The gasifier 5 may be a steam gasifier.

[0019] The tube side of the cryogenic heat exchanger 2 is chilled brine.

[0020] Example 2

[0021] A compressor exhaust air purification device includes a cryogenic heat exchanger 2 and a separation tank 3, wherein the shell side inlet of the cryogenic heat exchanger 2 is connected to the nitrogen sealed venting pipeline of the compressor 1 and is provided with a cryogenic heat exchanger inlet valve 21, and the shell side outlet of the cryogenic heat exchanger 2 is connected to the upper and middle part of the separation tank 3 and is provided with a cryogenic heat exchanger outlet valve 22; an emergency venting pipeline is provided at the top of the shell side of the cryogenic heat exchanger 2 and an emergency venting control valve 23 is provided, and a separation tank venting line is provided at the top of the separation tank 3 and a separation tank venting valve 31 is provided, and the separation tank air defense line is connected to the emergency venting control valve 23; a recovery line is provided at the bottom of the separation tank 3 and a separation tank bottom valve 32 is provided, the recovery line is connected to a recovery pump 4, the recovery pump 4 is connected to a vaporizer 5, and the vaporizer 5 is connected to the compressor inlet pipeline 11.

[0022] The gasifier 5 may be a static gasifier.

[0023] The tube side of the cryogenic heat exchanger 2 is chilled brine.

[0024] The separation tank 3 is further provided with a liquid level gauge 33 , and the liquid level gauge 33 is electrically connected to the recovery pump 4 .

[0025] Compared with Example 1, Example 2 adds a liquid level gauge 33 to the separation tank 3, which can better control the external collection of the recovery pump 4 and improve the stability of the device operation. In addition, both Example 1 and Example 2 can effectively recover the compressed material and reduce the odor of the on-site exhaust gas.

Claims

1. A compressor air purification device, characterized in that: The invention comprises a cryogenic heat exchanger (2) and a separation tank (3), wherein the shell side inlet of the cryogenic heat exchanger (2) is connected to the nitrogen sealing venting pipeline of the compressor (1) and is provided with a cryogenic heat exchanger inlet valve (21), and the shell side outlet of the cryogenic heat exchanger (2) is connected to the middle and upper part of the separation tank (3) and is provided with a cryogenic heat exchanger outlet valve (22); an emergency venting pipeline is provided at the top of the shell side of the cryogenic heat exchanger (2) and is provided with an emergency venting control valve (23); a separation tank venting line is provided at the top of the separation tank (3) and is provided with a separation tank venting valve (31); the separation tank air defense line is connected to the rear of the emergency venting control valve (23); a recovery line is provided at the bottom of the separation tank (3) and is provided with a separation tank bottom valve (32); the recovery line is connected to a recovery pump (4), the recovery pump (4) is connected to a vaporizer (5), and the vaporizer (5) is connected to the compressor inlet pipeline (11).

2. A compressor exhaust air purification device according to claim 1, characterized in that: The gasifier (5) may be a static gasifier or a steam gasifier.

3. A compressor exhaust air purification device according to claim 1, characterized in that: The tube side of the cryogenic heat exchanger (2) is filled with refrigerated brine.

4. A compressor exhaust air purification device according to claim 1, characterized in that: The separation tank (3) is further provided with a liquid level meter (33), and the liquid level meter (33) is electrically connected to the recovery pump (4).

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