Gas water-oil separation conveying system

Abstract

The utility model discloses a gas water-oil separation conveying system, which is characterized in that outlets of a first oil tank and a second oil tank are connected with an inlet of an oil drain pump through pipelines, and an outlet of the oil drain pump is connected with an oil drain pipe; a first oil-water interface meter is mounted at the bottom of the first oil tank, and a second oil-water interface meter is mounted at the bottom of the second oil tank; a first oil drain valve is installed on the pipeline between the first oil groove and the oil drain pump, a second oil drain valve is installed on the pipeline between the second oil groove and the oil drain pump, a first water drain valve is installed on the pipeline between the first water drain pump and the water drain pipe, and a second water drain valve is installed on the pipeline between the second water drain pump and the water drain pipe. The whole water drainage and oil drainage process is automatically controlled, oil caused by manual judgment and operation errors can be prevented from being sent back to a gas water system, and normal operation of the system is guaranteed.

Description

Technical field:

[0001] The utility model relates to the field of coal gasification, in particular to a coal gas water-oil separation and transportation system. Background technology:

[0002] During the coal gasification process, the washing, cooling and waste heat reuse of raw coal gas will produce a large amount of gas water, which contains a large amount of tar, light oil, phenol, ammonia and other substances. Therefore, the treatment of coal gas water needs to be equipped with a coal gas water treatment device as an auxiliary device supporting the coal gasification technology. The high oil content in the coal gas water is a common problem in the coal gas water treatment process. Since the circulation volume of the coal gas water device is large and a large amount of oil is produced during the coal gasification process, the oil in the coal gas water is easily adhered to the equipment or the inner wall of the pipeline after mixing with coal dust, causing blockage of the equipment and pipelines, seriously affecting the operation cycle of the heat exchanger and the deacidification tower of the phenol-ammonia recovery system, resulting in an increase in the operation cost of the device, so the oil needs to be separated.

[0003] During the oil recovery process, the gas water is sent to the oil-water separator, where the oil and water are separated by gravity sedimentation, and then sent to the first oil tank and the second oil tank respectively through the overflow port at the top. After sedimentation again in the first oil tank and the second oil tank, the gas water at the bottom is first sent back to the gas-water system, and then the oil is sent to the tank area for storage. During this process, workers need to judge whether the liquid in the first oil tank and the second oil tank should be discharged to the gas-water system or the tank area according to the liquid level, and perform related operations. However, due to manual judgment and errors in operation, the oil is sent back to the gas-water system, which in turn increases the oil content in the gas water, affecting the normal operation of the system. Utility model content:

[0004] The utility model aims to provide a gas, water and oil separation and transportation system.

[0005] The utility model is implemented by the following technical solutions:

[0006] A gas water-oil separation and transportation system comprises a first oil tank and a second oil tank, wherein the outlets of the first oil tank and the second oil tank are respectively connected to the inlets of a first drainage pump and a second drainage pump through pipelines, and the outlets of the first drainage pump and the second drainage pump are both connected to a drainage pipe through pipelines; the outlets of the first oil tank and the second oil tank are both connected to the inlet of an oil drainage pump through pipelines, and the outlet of the oil drainage pump is connected to the oil drainage pipe;

[0007] A first liquid level gauge is installed on the top of the first oil tank, a second liquid level gauge is installed on the top of the second oil tank, a first oil-water interface gauge is installed on the bottom of the first oil tank, and a second oil-water interface gauge is installed on the bottom of the second oil tank;

[0008] A first oil drain valve is installed on the pipeline between the first oil tank and the oil drain pump, a second oil drain valve is installed on the pipeline between the second oil tank and the oil drain pump, a first drain valve is installed on the pipeline between the first drain pump and the drain pipe, and a second drain valve is installed on the pipeline between the second drain pump and the drain pipe;

[0009] The signal output ends of the first oil-water interface meter and the second oil-water interface meter are electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the first drain pump, the second drain pump, the first oil drain valve, the second oil drain valve, the first drain valve and the second drain valve.

[0010] Preferably, the outlet of the first drain pump is also connected to the oil drain pipe through a pipeline, and a first switching valve is installed on the pipeline between the first drain pump and the oil drain pipe; the outlet of the second drain pump is also connected to the oil drain pipe through a pipeline, and a second switching valve is installed on the pipeline between the second drain pump and the oil drain pipe; a component analyzer is installed on the drain pipe;

[0011] The signal output end of the component analyzer is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the first switching valve and the second switching valve.

[0012] Preferably, it also includes a nitrogen sealing purge pipe, which is connected to the drain pipe and the oil drain pipe through a pipeline, and a shut-off valve is installed on the pipeline between the nitrogen sealing purge pipe and the drain pipe and the oil drain pipe.

[0013] The advantages of the utility model are as follows: the entire drainage and oil discharge process is automatically controlled, which can prevent the oil generated by manual judgment and operating errors from being sent back to the gas and water system, thereby ensuring the normal operation of the system; in the process of discharging gas and water, if the component analyzer detects that the oil content in the gas and water exceeds the standard, the oil-containing gas and water will be sent to the tank area to ensure that the high-oil gas and water will not be sent back to the gas and water, thereby ensuring the normal operation of the system. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of a control circuit of the utility model.

[0016] In the figure: a first oil tank 1, a second oil tank 2, a first drain pump 3, a second drain pump 4, a drain pipe 5, an oil drain pump 6, an oil drain pipe 7, a first oil-water interface meter 8, a second oil-water interface meter 9, a first oil drain valve 10, a second oil drain valve 11, a first drain valve 12, a second drain valve 13, a controller 14, a first switching valve 15, a second switching valve 16, a component analyzer 17, a nitrogen sealing purge pipe 18, a shut-off valve 19, a first liquid level gauge 20, and a second liquid level gauge 21. Specific implementation method:

[0017] like Figure 1 and Figure 2 As shown, a gas water-oil separation and transportation system comprises a first oil tank 1 and a second oil tank 2, wherein the outlets of the first oil tank 1 and the second oil tank 2 are respectively connected to the inlets of a first drainage pump 3 and a second drainage pump 4 through pipelines, and the outlets of the first drainage pump 3 and the second drainage pump 4 are both connected to a drainage pipe 5 through pipelines; the outlets of the first oil tank 1 and the second oil tank 2 are both connected to the inlet of an oil drainage pump 6 through pipelines, and the outlet of the oil drainage pump 6 is connected to an oil drainage pipe 7;

[0018] A first liquid level gauge 20 is installed on the top of the first oil tank 1, a second liquid level gauge 21 is installed on the top of the second oil tank 2, a first oil-water interface gauge 8 is installed on the bottom of the first oil tank 1, and a second oil-water interface gauge 9 is installed on the bottom of the second oil tank 2; a first oil drain valve 10 is installed on the pipeline between the first oil tank 1 and the oil drain pump 6, a second oil drain valve 11 is installed on the pipeline between the second oil tank 2 and the oil drain pump 6, a first drain valve 12 is installed on the pipeline between the first drain pump 3 and the drain pipe 5, and a second drain valve 13 is installed on the pipeline between the second drain pump 4 and the drain pipe 5; the signal output ends of the first oil-water interface gauge 8 and the second oil-water interface gauge 9 are electrically connected to the signal input end of the controller 14, and the signal output end of the controller 14 is electrically connected to the signal input ends of the first drain pump 3, the second drain pump 4, the first oil drain valve 10, the second oil drain valve 11, the first drain valve 12 and the second drain valve 13;

[0019] When in use, gas water is injected into the oil-water separator, and the oil is discharged from the top overflow port to the first oil tank 1 and the second oil tank 2. After settling in the first oil tank 1 and the second oil tank 2, the gas water at the bottom is first discharged, and the gas water in the first oil tank 1 and the second oil tank 2 is respectively sent to the gas water treatment system through the first drainage pump 3 and the second drainage pump 4. After the water at the bottom is drained, the oil is sent to the tank area for storage through the oil drainage pump 6;

[0020] The first oil-water interface meter 8 and the second oil-water interface meter 9 detect the oil-water interface in the first oil tank 1 and the second oil tank 2 respectively, and the first liquid level meter 20 and the second liquid level meter 21 detect the liquid level in the first oil tank 1 and the second oil tank 2 respectively;

[0021] Taking the first oil tank 1 as an example, when the first liquid level meter 20 detects that the liquid level in the first oil tank 1 reaches the highest liquid level, the controller 14 controls the first drainage pump 3 to start, the first drainage valve 12 to open, the first oil drainage valve 10 to close, and the first oil tank 1 starts to drain gas and water. After the gas and water are drained, the first oil-water interface meter 8 detects the oil-water interface of the first oil tank 1, and the controller 14 controls the first drainage pump 3 to close, the first drainage valve 12 to close, the first oil drainage valve 10 to open, and the first oil tank 1 starts to drain oil; the control process of the second oil tank 2 is the same; while the first oil tank 1 is draining water, the second oil tank 2 can drain oil without interfering with each other; the entire drainage and oil drainage process is automatically controlled, which can prevent the oil generated by manual judgment and operating errors from being sent back to the gas and water system, thereby ensuring the normal operation of the system.

[0022] The outlet of the first drain pump 3 is also connected to the oil drain pipe 7 through a pipeline, and a first switching valve 15 is installed on the pipeline between the first drain pump 3 and the oil drain pipe 7; the outlet of the second drain pump 4 is also connected to the oil drain pipe 7 through a pipeline, and a second switching valve 16 is installed on the pipeline between the second drain pump 4 and the oil drain pipe 7; a component analyzer 17 is installed on the drain pipe 5;

[0023] The signal output end of the component analyzer 17 is electrically connected to the signal input end of the controller 14, and the signal output end of the controller 14 is electrically connected to the signal input ends of the first switching valve 15 and the second switching valve 16;

[0024] The component analyzer 17 is used to detect the composition of the liquid in the drain pipe 5. During the process of draining gas and water, if the component analyzer 17 detects that the oil content in the gas and water exceeds 50% and lasts for more than 1 minute, the controller 14 controls the first switching valve 15 and the second switching valve 16 to open at the same time, and controls the first drain valve 12 and the second drain valve 13 to close at the same time, so that the oil-containing gas water is sent to the tank area, ensuring that the high-oil gas water will not be sent back to the gas water, thereby ensuring the normal operation of the system.

[0025] It also includes a nitrogen sealed purge pipe 18, which is connected to the drain pipe 5 and the oil drain pipe 7 through a pipeline, and a shut-off valve 19 is installed on the pipeline between the nitrogen sealed purge pipe 18 and the drain pipe 5 and the oil drain pipe 7; when there is no gas, water or oil transportation, the shut-off valve 19 is opened to inject medium-pressure nitrogen into the drain pipe 5 and the oil drain pipe 7 to ensure that VOCs in the oil tank area and gas water will not flow back.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas water-oil separation and transportation system, characterized in that: The utility model comprises a first oil tank and a second oil tank, wherein the outlets of the first oil tank and the second oil tank are respectively connected to the inlets of the first drainage pump and the second drainage pump through pipelines, and the outlets of the first drainage pump and the second drainage pump are both connected to the drainage pipe through pipelines; the outlets of the first oil tank and the second oil tank are both connected to the inlet of the oil drain pump through pipelines, and the outlet of the oil drain pump is connected to the oil drain pipe; A first liquid level gauge is installed on the top of the first oil tank, a second liquid level gauge is installed on the top of the second oil tank, a first oil-water interface gauge is installed on the bottom of the first oil tank, and a second oil-water interface gauge is installed on the bottom of the second oil tank; A first oil drain valve is installed on the pipeline between the first oil tank and the oil drain pump, a second oil drain valve is installed on the pipeline between the second oil tank and the oil drain pump, a first drain valve is installed on the pipeline between the first drain pump and the drain pipe, and a second drain valve is installed on the pipeline between the second drain pump and the drain pipe; The signal output ends of the first oil-water interface meter, the second oil-water interface meter, the first liquid level meter and the second liquid level meter are electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the first drain pump, the second drain pump, the first oil drain valve, the second oil drain valve, the first drain valve and the second drain valve.

2. A gas-water-oil separation and transportation system according to claim 1, characterized in that: The outlet of the first drain pump is also connected to the oil drain pipe through a pipeline, and a first switching valve is installed on the pipeline between the first drain pump and the oil drain pipe; the outlet of the second drain pump is also connected to the oil drain pipe through a pipeline, and a second switching valve is installed on the pipeline between the second drain pump and the oil drain pipe; a component analyzer is installed on the drain pipe; The signal output end of the component analyzer is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the first switching valve and the second switching valve.

3. A gas-water-oil separation and transportation system according to claim 1 or 2, characterized in that: It also includes a nitrogen sealing purge pipe, which is connected to the drain pipe and the oil drain pipe through a pipeline, and a cut-off valve is installed on the pipeline between the nitrogen sealing purge pipe and the drain pipe and the oil drain pipe.

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