CN220621945U - Ultralow concentration gas pretreatment system - Google Patents
Ultralow concentration gas pretreatment system Download PDFInfo
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- CN220621945U CN220621945U CN202322329227.8U CN202322329227U CN220621945U CN 220621945 U CN220621945 U CN 220621945U CN 202322329227 U CN202322329227 U CN 202322329227U CN 220621945 U CN220621945 U CN 220621945U
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- emission reduction
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- 238000002156 mixing Methods 0.000 claims abstract description 104
- 230000009467 reduction Effects 0.000 claims abstract description 56
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 238000002203 pretreatment Methods 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 52
- 230000001105 regulatory effect Effects 0.000 claims description 47
- 238000009792 diffusion process Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 8
- 238000011065 in-situ storage Methods 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 6
- 230000000740 bleeding effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 145
- 239000003245 coal Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model provides an ultralow-concentration gas pretreatment system which comprises a pumping pump station, a gas emission reduction utilization device, a blending pretreatment component, a blending post-treatment component and a safety protection subsystem, wherein the pumping pump station is connected with the gas emission reduction utilization device; the downstream of the extraction pump station is connected with a blending pretreatment component; a blending post-treatment component is arranged at the downstream of the blending pre-treatment component; the downstream of the blending post-treatment component is connected with a gas emission reduction utilization device, a safety protection subsystem and a gas emission reduction utilization device. The utility model adopts various control means, equipment redundancy and other methods, and can ensure the absolute safety of the gas emission reduction utilization system.
Description
Technical Field
The utility model relates to an ultralow-concentration gas pretreatment system, and belongs to the technical field of coal mine gas emission reduction and utilization.
Background
Extraction of gas refers to the process of extracting the gas produced from an underground mine or field. There are often large amounts of harmful and flammable gases including methane and the like in mines and oil fields. These gases are generated due to geological structures and biodegradable materials. The concentration of the gas is in the range of 5-16%, and explosion occurs when an open fire is encountered; the high-concentration gas is gas with the gas concentration of more than 25%; the low-concentration gas is gas with a gas concentration lower than 25%. The gas emission of the ultralow-concentration coal mine is huge, and the annual emission of the ultralow-concentration coal mine is more than 400 hundred million cubic meters of pure methane. Because the concentration is low, the safety risk is high, the emission reduction technology is not applicable, and the whole emission forms a huge greenhouse gas emission source. The prior gas pretreatment system mainly adopts conventional configurations such as water removal, filtration, concentration adjustment and the like. The utility model of China with the patent number of CN202222552536.7 discloses a cooling and dehydrating device for gas pretreatment, which can maximally ensure that the gas does not contain water vapor.
However, the inventors of the present utility model found that the prior art had the following problems: the prior gas pretreatment system has no guarantee measure in the aspect of reliability of concentration adjustment, and cannot ensure absolute safety of a gas emission reduction utilization system under the extreme special conditions of few meters, equipment faults and the like. Thus, improvements are needed.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an ultralow-concentration gas pretreatment system, which adopts various control means, equipment redundancy and other methods, and can ensure the absolute safety of a gas emission reduction utilization system.
The utility model is realized by the following technical scheme.
The utility model provides an ultralow-concentration gas pretreatment system which comprises a pumping pump station, a gas emission reduction utilization device, a mixing pretreatment component, a mixing post-treatment component and a safety protection subsystem, wherein the pumping pump station is connected with a gas emission reduction utilization device; the downstream of the extraction pump station is connected with a blending pretreatment component; a blending post-treatment component is arranged at the downstream of the blending pre-treatment component; the downstream of the blending post-treatment component is connected with a gas emission reduction utilization device, a safety protection subsystem and a gas emission reduction utilization device.
The inlet of the safety protection subsystem is arranged in front of the inlet of the gas emission reduction utilization device, and the safety protection subsystem and the gas emission reduction utilization device are arranged in parallel.
The mixing pretreatment component comprises a gas diffusing pipe, an emission reduction system inlet manual valve, a cyclone dehydrator, a first quick cut-off valve, a second quick cut-off valve, a first gas flow regulating valve and a second gas flow regulating valve; the gas diffusion pipe is arranged next to the extraction pump station; the lower part of the gas diffusion pipe is closely connected with an inlet manual valve of the emission reduction system; a cyclone dehydrator is connected to the downstream of the manual valve at the inlet of the emission reduction system; the downstream of the cyclone dehydrator is closely and sequentially connected with a first quick cut-off valve and a second quick cut-off valve; the downstream of the second quick shut-off valve is connected with a first gas flow regulating valve and a second gas flow regulating valve.
A gas diffusion regulating valve is arranged in the middle of the gas diffusion pipe; an automatic water seal relief valve is connected between the lower part of the manual valve at the inlet of the emission reduction system and the upper part of the gas relief pipe; the first gas flow regulating valve and the second gas flow regulating valve are arranged in parallel; the methane concentration sensor before blending is connected between the manual valve at the inlet of the emission reduction system and the cyclone dehydrator; and a gas pressure sensor and a gas flow sensor are sequentially connected between the second quick shut-off valve and the first gas flow regulating valve.
The mixing aftertreatment component comprises a primary mixing blower, a primary mixing mixer, a blower and a quick cut-off valve; a first-stage blending mixer is connected to the downstream of the independently arranged first-stage blending blower; a blower is connected to the downstream of the primary blending mixer; the downstream of the blower is connected with a quick cut-off valve; the downstream of the quick cut-off valve is connected with a gas emission reduction and utilization device of a terminal.
One end of the primary blending mixer is connected with a pipeline after the first gas flow regulating valve and the second gas flow regulating valve are connected in parallel; a methane concentration sensor after primary blending is connected between the other end of the primary blending mixer and the first pipeline of the secondary blending mixer; the second pipeline of the secondary blending mixer is connected with a blending air regulating valve; a second-stage blended methane concentration sensor, a blended flow sensor, a laser in-situ methane concentration sensor and an emergency blending valve are sequentially connected between a third pipeline of the second-stage blending mixer and the blower; the purge relief valve is connected between the blower and the quick disconnect valve.
The safety protection subsystem comprises an emergency inflation valve and a safety protection gas storage tank; an emergency inflation valve is connected between the blowing-off valve and the quick cut-off valve; the emergency inflation valve is connected with a safety protection gas storage tank immediately downstream.
The utility model has the beneficial effects that: by adopting various control means, equipment redundancy and other methods, the safety of the gas emission reduction and utilization device is ensured when any two instruments or equipment below the two instruments or equipment fail; the gas emission reduction device can rapidly release high-pressure safety protection gas when in failure, and a safety gas curtain is rapidly formed at an inlet of the gas emission reduction device to block combustible gas from entering the gas emission reduction device, so that the safety and reliability of the gas emission reduction system are further improved.
Drawings
FIG. 1 is a diagram of an ultra-low concentration gas pretreatment system of the present utility model;
in the figure: the system comprises a 1-extraction pump station, a 2-emission regulating valve, a 3-gas emission pipe, a 4-emission reduction system inlet manual valve, a 5-automatic water seal emission valve, a 6-pre-mixing methane concentration sensor, a 7-cyclone dehydrator, an 8-first quick cut-off valve, a 9-second quick cut-off valve, a 10-gas pressure sensor, a 11-gas flow sensor, a 12-first gas flow regulating valve, a 13-second gas flow regulating valve, a 14-primary mixing blower, a 15-primary mixing mixer, a 16-primary mixing methane concentration sensor, a 17-secondary mixing mixer, a 18-mixing air regulating valve, a 19-secondary mixing methane concentration sensor, a 20-mixing post-flow sensor, a 21-laser in-situ methane concentration sensor, a 22-emergency mixing valve, a 23-blower, a 24-emission valve, a 25-emergency inflation valve, a 26-safety protection gas storage tank, a 27-quick cut-off valve, a 28-gas emission reduction device, a 29-mixing pre-treatment part, a 30-treatment part, a 31-safety sub-treatment part, and a safety sub-treatment part.
Detailed Description
The technical solution of the present utility model is further described below, but the scope of the claimed utility model is not limited to the above.
The first embodiment of the utility model relates to an ultra-low concentration gas pretreatment system shown in fig. 1, which comprises a pumping pump station 1, a gas emission reduction utilization device 28, a mixing pretreatment component 29, a mixing post-treatment component 30 and a safety protection subsystem 31; a blending pretreatment component 29 is connected to the downstream of the extraction pump station 1; downstream of the blending pretreatment unit 29, a blending post-treatment unit 30 is provided; the downstream of the blending post-treatment component 30 is connected with a gas emission reduction device 28, a safety protection subsystem 31 and the gas emission reduction device 28. The extraction pump station 1 is used for extracting gas from a coal seam; the gas emission reduction and utilization device 28 is used for reducing emission of the gas after the concentration treatment is safe; the blending pretreatment unit 29 is used for carrying out preliminary treatment on the gas just extracted; the blending post-treatment component 30 can pump the primarily treated gas into the air for a mixing process to reduce the gas concentration to a safe concentration level.
The inlet of the safety protection subsystem 31 is arranged before the inlet of the gas emission reduction device 28, and the safety protection subsystem 31 and the gas emission reduction device 28 are arranged in parallel. The safety protection subsystem 31 can release the high-pressure safety protection gas as a final safety measure.
The second embodiment of the present utility model is substantially identical to the first embodiment, and is primarily directed to the optimization of the blending pretreatment component. The mixing pretreatment component 29 comprises a gas diffusing pipe 3, an emission reduction system inlet manual valve 4, a cyclone dehydrator 7, a first quick cut-off valve 8, a second quick cut-off valve 9, a first gas flow regulating valve 12 and a second gas flow regulating valve 13; the gas diffusion pipe 3 is arranged next to the extraction pump station 1; the downstream of the gas diffusion pipe 3 is closely connected with an inlet manual valve 4 of the emission reduction system; the downstream of the manual valve 4 of the inlet of the emission reduction system is connected with a cyclone dehydrator 7; the downstream of the cyclone dehydrator 7 is connected with a first quick cut-off valve 8 and a second quick cut-off valve 9 in sequence; a first gas flow regulating valve 12 and a second gas flow regulating valve 13 are connected to the downstream of the second quick shut-off valve 9. The gas diffusing pipe 3 can discharge air and fuel gas in the pipeline, prevent explosive mixed gas from forming in the pipeline, and also can carry out overpressure protection on downstream equipment; the emission reduction system inlet manual valve 4 is used for controlling whether the gas enters an ultralow-concentration gas pretreatment system; the cyclone dehydrator 7 is used for removing free water in the extracted gas, so that the gas is convenient to reduce emission and use; the first quick cut-off valve 8 and the second quick cut-off valve 9 have the same functions, and can absolutely ensure that the gas transmission is cut off through instrument redundancy; the first gas flow regulating valve 12 and the second gas flow regulating valve 13 have the same functions, and can ensure that the gas flow can be regulated under the condition of a certain gas flow regulating valve failure through the redundancy of key parts.
A gas diffusion regulating valve 2 is arranged in the middle of the gas diffusion pipe 3; an automatic water seal diffusion valve 5 is connected between the downstream of the manual valve 4 at the inlet of the emission reduction system and the upper part of the gas diffusion pipe 3; the first gas flow regulating valve 12 and the second gas flow regulating valve 13 are arranged in parallel; the methane concentration sensor 6 before blending is connected between the manual valve 4 at the inlet of the emission reduction system and the cyclone dehydrator 7; a gas pressure sensor 10 and a gas flow sensor 11 are sequentially connected between the second quick shut-off valve 9 and the first gas flow regulating valve 12. The gas diffusing regulating valve 2 can regulate the flow of the pipeline of the gas diffusing pipe 3; the automatic water seal bleeding valve 5 can diffuse redundant gas extraction, and ensure the safety of the system. The methane concentration sensor 6, the gas pressure sensor 10 and the gas flow sensor 11 are used for extracting gas data indexes, so that the system safety is ensured.
The third embodiment of the present utility model is substantially identical to the first embodiment, and is primarily concerned with the optimization of the blending of the aftertreatment component. The blending post-treatment component 30 includes a primary blending blower 14, a primary blending mixer 15, a blower 23, a quick shut-off valve 27; a first-stage blending mixer 15 is connected downstream of the separately arranged first-stage blending blower 14; a blower 23 is connected downstream of the primary blending mixer 15; a quick shut-off valve 27 is connected downstream of the blower 23; a terminal gas emission reduction device 28 is connected to the downstream of the quick shut-off valve 27. The primary blending blower 14 is used to provide pressurized power; the primary blending mixer 15 is used for mixing the extracted gas conveyed from the first gas flow regulating valve 12 with the air conveyed from the primary blending blower 14 in the primary blending mixer 15, so that the concentration of the extracted gas is reduced to below 3%; the blower 23 can boost the pressure of the air after primary blending, the pressure of the air is close to the initial pressure of the extracted gas, and the safety and the reliability of the blended air are improved; the quick cut-off valve 27 is used for quickly cutting off a pipeline in case of failure, so that gas with over-limited concentration is prevented from entering the gas emission reduction and utilization device 28.
One end of the primary mixing mixer 15 is connected with a pipeline after being connected with the first gas flow regulating valve 12 and the second gas flow regulating valve 13 in parallel; a methane concentration sensor 16 after primary blending is connected between the other end of the primary blending mixer 15 and the first pipeline of the secondary blending mixer 17; the second pipeline of the secondary blending mixer 17 is connected with a blending air regulating valve 18; a second-stage blended methane concentration sensor 19, a blended flow sensor 20, a laser in-situ methane concentration sensor 21 and an emergency blending valve 22 are sequentially connected between a third pipeline of the second-stage blending mixer 17 and a blower 23; the purge relief valve 24 is connected between the blower 23 and the quick disconnect valve 27. Part of the fresh air is mixed again with the primary blending gas in the secondary blending mixer 17 through the blending air regulating valve 18, and adjusted to a desired concentration. The two-stage mixed methane concentration sensor 19, the mixed flow sensor 20 and the laser in-situ methane concentration sensor 21 are adopted, so that the redundancy of equipment is increased, and the safety and the reliability of the system are improved; the laser in-situ methane concentration sensor 21 employs a fast response monitor with a response time of less than 1s.
The safety protection subsystem 31 comprises an emergency inflation valve 25 and a safety protection gas storage tank 26; an emergency charging valve 25 is connected between the purge relief valve 24 and the quick cut-off valve 27; immediately downstream of the emergency inflation valve 25 is connected a safety protection gas reservoir 26. The safety protection gas storage tank 26 stores high-pressure safety protection gas; the emergency charging valve 25 and the safety protection gas storage tank 26 are a set of relatively independent safety protection subsystem, and can be automatically started during failure and power failure, so that the safety and reliability of the system are further improved.
Based on the above, a typical working procedure of the present utility model is:
as shown in fig. 1, in the implementation of the utility model, a gas extraction pump station 1 discharges gas extraction into a gas diffusion pipe 3; the manual valve 4 at the inlet of the emission reduction system enters an ultra-low concentration gas pretreatment system, and enters a cyclone dehydrator 7 to remove free water in the extracted gas after being detected by a methane concentration sensor 6 before being mixed; after passing through the first quick cut-off valve 8 and the second quick cut-off valve 9, the gas is subjected to index detection by the gas pressure sensor 10 and the gas flow sensor 11 and then divided into two channels, the two channels are respectively subjected to adjustment by the first gas flow regulating valve 12 and the second gas flow regulating valve 13, and then are combined into one stream to enter the primary blending mixer 15 to be mixed with air sent by the primary blending blower 14, and the extracted gas after primary blending enters the secondary blending mixer 17 to be secondarily mixed with part of air from the blending air regulating valve 18 after being subjected to detection by the methane concentration sensor 16 after primary blending; the secondary mixed extracted gas is sequentially subjected to index monitoring of a secondary mixed methane concentration sensor 19, a mixed flow sensor 20 and a laser in-situ methane concentration sensor 21, then enters a blower 23 for pressurization, so that the air pressure of the secondary mixed extracted gas reaches the air pressure when the gas is just extracted, and finally enters a gas emission reduction utilization device 28 through a quick cut-off valve 27 for final treatment of the gas. When the extraction and utilization amount matching or the closing of the first quick cut-off valve 8 and the second quick cut-off valve 9 can not be realized after the adjustment of the bleeding adjusting valve 2, the automatic water seal bleeding valve 5 is opened to bleed redundant extraction gas, so that the safety of the system is ensured; when a fault occurs, the quick cut-off valve 27 is cut off, the emergency blending valve 22 and the purging and diffusing valve 24 are opened, fresh air enters the pipeline from the emergency blending valve 22, mixed gas is discharged into the atmosphere through the purging and diffusing valve 24, the gas concentration in the pipeline at the upper and downstream of the blower 23 is rapidly reduced, and the safety of a gas emission reduction and utilization system is ensured.
Claims (7)
1. An ultra-low concentration gas pretreatment system, which is characterized in that: comprises a pumping station (1), a gas emission reduction utilization device (28), a mixing pretreatment component (29), a mixing post-treatment component (30) and a safety protection subsystem (31); the downstream of the extraction pump station (1) is connected with a blending pretreatment component (29); a blending post-treatment component (30) is arranged at the downstream of the blending pre-treatment component (29); the downstream of the blending post-treatment component (30) is connected with a gas emission reduction utilization device (28), a safety protection subsystem (31) and the gas emission reduction utilization device (28).
2. The ultra-low concentration gas pretreatment system according to claim 1, wherein: the inlet of the safety protection subsystem (31) is arranged in front of the inlet of the gas emission reduction utilization device (28), and the safety protection subsystem (31) and the gas emission reduction utilization device (28) are arranged in parallel.
3. The ultra-low concentration gas pretreatment system according to claim 1, wherein: the mixing pretreatment component (29) comprises a gas diffusion pipe (3), an emission reduction system inlet manual valve (4), a cyclone dehydrator (7), a first quick cut-off valve (8), a second quick cut-off valve (9), a first gas flow regulating valve (12) and a second gas flow regulating valve (13); the gas diffusion pipe (3) is arranged next to the extraction pump station (1); the downstream of the gas discharging pipe (3) is closely connected with an inlet manual valve (4) of the emission reduction system; a cyclone dehydrator (7) is connected to the downstream of the manual valve (4) at the inlet of the emission reduction system; the downstream of the cyclone dehydrator (7) is closely and sequentially connected with a first quick cut-off valve (8) and a second quick cut-off valve (9); the downstream of the second quick shut-off valve (9) is connected with a first gas flow regulating valve (12) and a second gas flow regulating valve (13).
4. The ultra-low concentration gas pretreatment system according to claim 3, wherein: a gas diffusion regulating valve (2) is arranged in the middle of the gas diffusion pipe (3); an automatic water seal bleeding valve (5) is connected between the downstream of the manual valve (4) at the inlet of the emission reduction system and the upper part of the gas bleeding pipe (3); the first gas flow regulating valve (12) and the second gas flow regulating valve (13) are arranged in parallel; the methane concentration sensor (6) before blending is connected between the manual valve (4) at the inlet of the emission reduction system and the cyclone dehydrator (7); a gas pressure sensor (10) and a gas flow sensor (11) are sequentially connected between the second quick cut-off valve (9) and the first gas flow regulating valve (12).
5. The ultra-low concentration gas pretreatment system according to claim 1, wherein: the blending post-treatment component (30) comprises a primary blending blower (14), a primary blending mixer (15), a blower (23) and a quick cut-off valve (27); a first-stage blending mixer (15) is connected to the downstream of the independently arranged first-stage blending blower (14); a blower (23) is connected to the downstream of the primary blending mixer (15); a quick cut-off valve (27) is connected to the downstream of the blower (23); and a gas emission reduction and utilization device (28) of a terminal is connected to the downstream of the quick cut-off valve (27).
6. The ultra-low concentration gas pretreatment system according to claim 5, wherein: one end of the primary mixing mixer (15) is connected with a pipeline after the first gas flow regulating valve (12) and the second gas flow regulating valve (13) are connected in parallel; a methane concentration sensor (16) after primary blending is connected between the other end of the primary blending mixer (15) and a first pipeline of the secondary blending mixer (17); the second pipeline of the secondary blending mixer (17) is connected with a blending air regulating valve (18); a second-stage mixed methane concentration sensor (19), a mixed flow sensor (20), a laser in-situ methane concentration sensor (21) and an emergency mixing valve (22) are sequentially connected between a third pipeline of the second-stage mixing mixer (17) and the blower (23); the purge relief valve (24) is connected between the blower (23) and the quick shut-off valve (27).
7. The ultra-low concentration gas pretreatment system according to claim 1, wherein: the safety protection subsystem (31) comprises an emergency inflation valve (25) and a safety protection gas storage tank (26); an emergency inflation valve (25) is connected between the blowing-off and diffusing valve (24) and the quick cut-off valve (27); a safety protection gas storage tank (26) is connected to the immediately downstream of the emergency charging valve (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322329227.8U CN220621945U (en) | 2023-08-29 | 2023-08-29 | Ultralow concentration gas pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322329227.8U CN220621945U (en) | 2023-08-29 | 2023-08-29 | Ultralow concentration gas pretreatment system |
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| Publication Number | Publication Date |
|---|---|
| CN220621945U true CN220621945U (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322329227.8U Active CN220621945U (en) | 2023-08-29 | 2023-08-29 | Ultralow concentration gas pretreatment system |
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| Country | Link |
|---|---|
| CN (1) | CN220621945U (en) |
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2023
- 2023-08-29 CN CN202322329227.8U patent/CN220621945U/en active Active
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