Compressor inlet filter system
By designing a compressor inlet filtration system and using pressure gauges and controllers to manage solenoid valves, the problem of separator blockage caused by tar dust in coke oven gas was solved, achieving normal separation of coke oven gas and stable operation of the production system, reducing raw material waste and energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA JUNZHENG CHEM IND CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-21
AI Technical Summary
The coke oven gas contains impurities such as tar dust, which can cause blockage of the compressor inlet separator, affecting the efficiency of the production system and resulting in raw material waste and increased energy consumption.
A compressor inlet filtration system was designed, including a separator and a filter. The system monitors the pressure using inlet and outlet pressure gauges, controls the solenoid valve to switch the coke oven gas flow path using a controller, and manages the tar using a level gauge and an oil drain valve to ensure normal system operation.
This effectively prevents filter screen clogging, ensures normal separation of coke oven gas, reduces raw material gas venting, and improves the stability and efficiency of the production system.
Smart Images
Figure CN224532927U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor inlet filtration, specifically to a compressor inlet filtration system. Background Technology
[0002] Coke oven gas, an important byproduct of coke production, mainly consists of hydrogen, methane, carbon monoxide, and carbon dioxide, and has extremely high recycling value. To achieve efficient conversion of this resource, the industry widely adopts the process of producing methanol from coke oven gas. The specific process is as follows: coke oven gas first undergoes gas purification to remove some impurities, then undergoes a methane conversion process to adjust the gas composition, and finally, the resulting syngas is directly used for the industrial production of methanol.
[0003] Coke oven gas typically contains significant amounts of impurities such as tar dust and naphthalene. These impurities can easily cause malfunctions in critical equipment during the coke oven gas compression stage. Specifically, the wire mesh of the compressor inlet separator gradually becomes clogged due to impurities. This problem directly leads to a significant decrease in the load on the centrifugal compressor, severely impacting the overall operating efficiency of the production system. Moreover, when the separator becomes clogged, it must be shut down immediately for cleaning. During this period, the coke oven gas cannot enter subsequent pretreatment processes and must be vented through a flare. This method not only results in a serious waste of raw materials for methanol production but also increases the company's energy consumption and environmental burden, becoming a key factor restricting the stable and efficient operation of the coke oven gas-to-methanol process. Utility Model Content
[0004] The purpose of this invention is to provide a compressor inlet filtration system.
[0005] This utility model is implemented by the following technical solution:
[0006] A compressor inlet filtration system includes a separator and a filter. The first inlet of the separator and the inlet of the filter are respectively connected to a coke oven gas inlet pipe, and the exhaust outlet of the separator and the exhaust outlet of the filter are respectively connected to a coke oven gas outlet pipe. The second inlet of the separator is connected to the compressor's second-stage return pipe.
[0007] An inlet pressure gauge and an outlet pressure gauge are installed at the inlet and outlet of the filter, respectively. A first solenoid valve is installed at the first inlet of the separator, and a second solenoid valve is installed at the inlet of the filter. The signal output terminals of the inlet and outlet pressure gauges are connected to the signal input terminals of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminals of the first and second solenoid valves.
[0008] Preferably, the purge gas inlet of the filter is connected to a nitrogen pipe, and the purge gas outlet of the filter is connected to the vent pipe.
[0009] Preferably, a shut-off valve is installed at both the air inlet and the air outlet of the filter.
[0010] Preferably, the second air inlet of the separator and the steam inlet of the filter are respectively connected to a steam pipe.
[0011] Preferably, a first level gauge is installed at the lower part of the separator, a first oil drain pipe is connected to the bottom of the separator, a first oil drain valve is installed on the first oil drain pipe, the signal output terminal of the first level gauge is connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminal of the first oil drain valve.
[0012] Preferably, a second level gauge is installed at the bottom of the filter, a second oil drain pipe is connected to the bottom of the separator, a second oil drain valve is installed on the second oil drain pipe, the signal output terminal of the second level gauge is connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminal of the second oil drain valve.
[0013] The advantages of this invention are as follows: The inlet and outlet pressure gauges are used to detect the pressure at the filter inlet and outlet. If the pressure measured by the inlet and outlet pressure gauges is higher than 0.15 MPa, the controller controls the first solenoid valve to open and the second solenoid valve to close. The coke oven gas enters the separator from the coke oven gas inlet pipe. The separator is used to separate the tar. The filter is removed for maintenance, which ensures that the coke oven gas can pass through the separator to separate the tar and then be sent to the compressor. This avoids the production system from being unable to operate normally due to filter screen blockage and reduces the venting of raw material gas. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is the control principle diagram of this utility model.
[0016] In the diagram: 1. Separator; 2. Filter; 3. Coke oven gas inlet pipe; 4. Coke oven gas outlet pipe; 5. Compressor second-stage return pipe; 6. Inlet pressure gauge; 7. Exhaust pressure gauge; 8. First solenoid valve; 9. Second solenoid valve; 10. Controller; 11. Nitrogen pipe; 12. Vent pipe; 13. Shut-off hand valve; 14. Steam pipe; 15. First level gauge; 16. First oil drain pipe; 17. First oil drain valve; 18. Second level gauge; 19. Second oil drain pipe; 20. Second oil drain valve. Detailed Implementation
[0017] like Figure 1 and Figure 2 As shown, a compressor inlet filtration system includes a separator 1 and a filter 2. The first inlet of the separator 1 and the inlet of the filter 2 are respectively connected to the coke oven gas inlet pipe 3, and the exhaust ports of the separator 1 and the filter 2 are respectively connected to the coke oven gas outlet pipe 4. The second inlet of the separator 1 is connected to the compressor second-stage return pipe 5.
[0018] An inlet pressure gauge 6 and an outlet pressure gauge 7 are installed at the inlet and outlet of the filter 2, respectively. A first solenoid valve 8 is installed at the first inlet of the separator 1, and a second solenoid valve 9 is installed at the inlet of the filter 2. The signal output terminals of the inlet pressure gauge 6 and the outlet pressure gauge 7 are connected to the signal input terminal of the controller 10. The signal output terminal of the controller 10 is electrically connected to the signal output terminals of the first solenoid valve 8 and the second solenoid valve 9.
[0019] During production, the first solenoid valve 8 is closed and the second solenoid valve 9 is open. Coke oven gas enters the filter 2 from the coke oven gas inlet pipe 3. The filter 2 separates the tar from the coke oven gas. The coke oven gas after tar separation is sent to the coke oven gas outlet pipe 4 through the exhaust port, and then sent to the compressor for pressurization. Meanwhile, the coke oven gas in the compressor's second-stage return pipe 5 is sent to the separator 1, where it is further separated from the tar and discharged from the exhaust port. It then merges with the coke oven gas discharged from the filter 2 and is sent to the coke oven gas outlet pipe 4.
[0020] Inlet pressure gauge 6 and outlet pressure gauge 7 are used to detect the pressure at the inlet and outlet of filter 2 and send the signal to controller 10. If the pressure measured by inlet pressure gauge 6 and outlet pressure gauge 7 is higher than 0.15 MPa, the filter screen of filter 2 is severely blocked. Controller 10 controls the first solenoid valve 8 to open and the second solenoid valve 9 to close. Coke oven gas enters separator 1 from coke oven gas inlet pipe 3. Separator 1 is used to separate tar. Filter 2 is removed for maintenance to ensure that coke oven gas can pass through separator 1 normally to separate tar and then be sent to compressor. This avoids the production system from being unable to operate normally due to the blockage of filter screen of filter 2 and reduces the venting of raw material gas.
[0021] The purge gas inlet of filter 2 is connected to nitrogen pipe 11, and the purge gas outlet of filter 2 is connected to vent pipe 12. When maintaining filter 2, high-pressure nitrogen is introduced through nitrogen pipe 11 to remove the tar on the wire mesh and discharge it from vent pipe 12.
[0022] Both the air inlet and exhaust outlet of filter 2 are equipped with shut-off hand valves 13. During maintenance, the shut-off hand valves 13 are used to completely disconnect filter 2 to prevent coke oven gas leakage.
[0023] The second air inlet of separator 1 and the steam inlet of filter 2 are connected to steam pipe 14 respectively. In winter, the temperature of separator 1 and filter 2 is increased by steam to prevent tar from solidifying on the wire mesh.
[0024] A first level gauge 15 is installed at the bottom of the separator 1. A first oil drain pipe 16 is connected to the bottom of the separator 1. A first oil drain valve 17 is installed on the first oil drain pipe 16. The signal output terminal of the first level gauge 15 is connected to the signal input terminal of the controller 10. The signal output terminal of the controller 10 is electrically connected to the signal output terminal of the first oil drain valve 17.
[0025] The first level gauge 15 is used to detect the tar level in the separator 1 and send the signal to the controller 10. When the level reaches the set value, the controller 10 controls the first oil drain valve 17 to open, and the tar in the separator 1 is discharged from the first oil drain pipe 16. When the level reaches the minimum set value, the controller 10 controls the first oil drain valve 17 to close.
[0026] A second level gauge 18 is installed at the bottom of filter 2. A second oil drain pipe 19 is connected to the bottom of separator 1. A second oil drain valve 20 is installed on the second oil drain pipe 19. The signal output terminal of the second level gauge 18 is connected to the signal input terminal of controller 10. The signal output terminal of controller 10 is electrically connected to the signal output terminal of the second oil drain valve 20.
[0027] The second level gauge 18 is used to detect the tar level in the filter 2 and send the signal to the controller 10. When the level reaches the set value, the controller 10 controls the second drain valve 20 to open, and the tar in the filter 2 is discharged from the second drain pipe 19. When the level reaches the minimum set value, the controller 10 controls the second drain valve 20 to close.
[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A compressor inlet filtration system, characterized in that, The system includes a separator and a filter. The first air inlet of the separator and the air inlet of the filter are respectively connected to the coke oven gas inlet pipe, and the exhaust port of the separator and the exhaust port of the filter are respectively connected to the coke oven gas outlet pipe. The second air inlet of the separator is connected to the second-stage return pipe of the compressor. An inlet pressure gauge and an outlet pressure gauge are installed at the inlet and outlet of the filter, respectively. A first solenoid valve is installed at the first inlet of the separator, and a second solenoid valve is installed at the inlet of the filter. The signal output terminals of the inlet and outlet pressure gauges are connected to the signal input terminals of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminals of the first and second solenoid valves.
2. The compressor inlet filtration system according to claim 1, characterized in that, The purge gas inlet of the filter is connected to a nitrogen pipe, and the purge gas outlet of the filter is connected to a vent pipe.
3. The compressor inlet filtration system according to claim 2, characterized in that, Both the air inlet and air outlet of the filter are equipped with shut-off valves.
4. The compressor inlet filtration system according to claim 1, characterized in that, The second air inlet of the separator and the steam inlet of the filter are respectively connected to the steam pipe.
5. The compressor inlet filtration system according to any one of claims 1 to 4, characterized in that, A first level gauge is installed at the bottom of the separator, and a first oil drain pipe is connected to the bottom of the separator. A first oil drain valve is installed on the first oil drain pipe. The signal output terminal of the first level gauge is connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminal of the first oil drain valve.
6. The compressor inlet filtration system according to any one of claims 1 to 4, characterized in that, A second level gauge is installed at the bottom of the filter, and a second oil drain pipe is connected to the bottom of the separator. A second oil drain valve is installed on the second oil drain pipe. The signal output terminal of the second level gauge is connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the signal output terminal of the second oil drain valve.