CN117366622A - Biogas combustion system comprising biogas pressure regulator - Google Patents
Biogas combustion system comprising biogas pressure regulator Download PDFInfo
- Publication number
- CN117366622A CN117366622A CN202210765396.3A CN202210765396A CN117366622A CN 117366622 A CN117366622 A CN 117366622A CN 202210765396 A CN202210765396 A CN 202210765396A CN 117366622 A CN117366622 A CN 117366622A
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- CN
- China
- Prior art keywords
- biogas
- pressure regulator
- gas collecting
- gas
- water tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- 230000003020 moisturizing effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a biogas combustion system comprising a biogas pressure regulator, which mainly solves the technical problems that the current biogas combustion system is unstable in biogas production and is easy to cause flameout or insufficient in combustion. The technical scheme of the invention is as follows: the utility model provides a marsh gas combustion system that contains marsh gas pressure regulator, includes anaerobic reactor, marsh gas torch, characterized by: the methane tank also comprises a pressure regulator, wherein an air inlet of the pressure regulator is connected with a methane pipeline of the anaerobic reactor, an air outlet of the pressure regulator is connected with a main pipe of the torch, and the main pipe of the torch is connected with the methane torch. The invention is mainly used for wastewater biogas treatment.
Description
Technical Field
The invention relates to a methane combustion system, in particular to a methane combustion system comprising a methane pressure regulator.
Background
The anaerobic sewage treatment can produce methane, the main component of which is methane, is a clean fuel, and can be used for a methane boiler or power generation. Biogas production is related to the amount of treated water and the COD concentration in the wastewater. Biogas generated by anaerobic treatment is firstly temporarily stored in a biogas storage cabinet and then sent to each biogas utilization facility. In addition, the biogas generator is also matched with a biogas torch, and is responsible for biogas combustion when the biogas yield is excessive or the biogas utilization facility is overhauled, so that the direct discharge of the atmosphere is avoided.
However, for some projects with low wastewater yield and low organic matter concentration, the biogas amount generated by anaerobic treatment is low and the utilization value is low, so that only a matched torch is needed for direct combustion, and a control mode of biogas-water-sealed tank-torch is generally adopted. However, because the biogas production is unstable, the torch is easy to flameout or insufficient in combustion. The biogas storage cabinet is arranged to increase buffering and maintain stable combustion of the torch, but the control system of the biogas storage cabinet pressure or material level and the torch ignition valve and the main valve is required to be increased.
Disclosure of Invention
The invention aims to provide a biogas combustion system comprising a biogas pressure regulator, which mainly solves the technical problems that the current biogas combustion system is unstable in biogas production and is easy to cause flameout or insufficient in combustion of a torch.
The technical scheme of the invention is as follows: the utility model provides a marsh gas combustion system that contains marsh gas pressure regulator, includes anaerobic reactor, marsh gas torch, characterized by: the methane tank also comprises a pressure regulator, wherein an air inlet of the pressure regulator is connected with a methane pipeline of the anaerobic reactor, an air outlet of the pressure regulator is connected with a main pipe of the torch, and the main pipe of the torch is connected with the methane torch.
The pressure regulating device comprises a water tank, an overflow port is arranged at the upper side of the water tank, an overflow weir capable of regulating the height is arranged at the overflow port, and an overflow groove is arranged at the overflow port. The overflow groove is provided with an overflow groove water outlet, and the top of the overflow groove is provided with a vent. The water tank below sets up the outlet, sets up the gas collecting channel in the middle of the water tank, and the outer wall and the water tank top welded fastening of gas collecting channel, gas collecting channel lower part and water tank intercommunication. The top of the gas collecting hood is provided with a methane outlet. The lateral part of the gas collecting hood is provided with a water supplementing port. An air inlet cover is arranged in the water tank and is welded and fixed with the inner wall of the gas collecting cover by virtue of a plurality of connecting plates at the outer side of the air inlet cover. An air inlet pipe is arranged at the top of the air inlet cover and penetrates through the upper part of the air collecting cover to be connected with a methane inlet. The lower part of the air inlet hood is communicated with the air collecting hood, and inverted U-shaped door openings are arranged at intervals on the edge of the lower part.
The horizontal cross sections of the water tank, the gas collecting hood and the gas inlet hood are square or round, and are generally round for convenient construction welding. The central axes of the water tank, the gas collecting hood and the gas inlet hood are coincident.
In order to ensure smooth water flow, a space is reserved between the lower edge of the gas collecting hood and the bottom of the water tank. The lower edge of the air inlet cover is higher than the lower edge of the air collecting cover, so that methane can be prevented from entering the top of the water tank from the lower edge of the air collecting cover. The inner wall of the gas collecting hood is provided with a gap with the outer wall of the gas inlet hood so as to ensure that gas can smoothly pass through. The upper space of the gas collecting hood can buffer the gas quantity.
In order to facilitate welding, a manhole is arranged at the top of the gas collecting hood, an air outlet is arranged on the manhole, and the manhole is connected with a flange of the gas collecting hood.
The top of the water tank is provided with a sight glass, so that the liquid level of the water tank can be observed. The bottom of the water tank can be provided with a lower margin bolt seat for fixing the device.
The outlet pipeline of the anaerobic reactor is provided with a pressure transmitter for measuring the biogas pressure of the pipeline.
And a bypass pipe is arranged at the upstream of the pressure regulator and connected with a torch ignition tube, and the torch ignition tube is connected with a methane torch. The bypass line is provided with an automatic control valve (ignition valve). The pipe diameter of the torch ignition pipe is smaller than that of the main pipe of the torch.
The main pipe and the ignition pipe are provided with flame arresters, and the marsh gas torch is provided with an igniter and a flame detection device and is connected with the pressure transmitter through an ignition control module.
The beneficial effects of the invention are as follows: through addding and containing the pressure regulator, through the setting of air inlet hood, gas collecting hood, water tank internal water level and overflow weir, through the matching of biogas capacity and water level, guarantee the steady output of marsh gas. Thereby avoiding flameout or insufficient combustion of the torch. The opening and closing of the biogas main pipeline are controlled through the pressure regulator, so that the automatic control of a biogas combustion system is simplified, and the potential safety hazard caused by failure of the self-control valve is reduced; the upper part of the pressure regulator gas collecting cover is provided with a certain space, so that the buffer of a pipeline between the pressure regulator and the flare on the change of the gas quantity is increased, and the stable combustion of the methane flare is facilitated; the lower edge of the pressure regulator air inlet cover is provided with an inverted U-shaped air outlet, compared with the traditional water seal air inlet pipe, the air outlet area can be changed along with the air quantity, the air outlet is stable, and excessive water is prevented from being discharged at the moment of air outlet; the pressure regulator is provided with the water tank, compared with a traditional water sealed tank, the water storage capacity is increased, and water seal failure caused by untimely water supplementing is avoided.
Drawings
FIG. 1 is a schematic diagram of a system according to the present invention.
Fig. 2 is a schematic right side view of the structure of the pressure regulator of the present invention.
Fig. 3 is a schematic top view of the structure of the pressure regulator of the present invention.
Fig. 4 is a sectional view A-A of fig. 3.
Fig. 5 is a sectional view of B-B of fig. 2.
In the figure: 1-anaerobic reactor, 2-marsh gas torch, 3-pressure regulator, 301-water tank, 302-overflow tank, 303-overflow tank outlet, 304-overflow weir, 305-outlet, 306-vent, 307-gas collecting hood, 308-marsh gas outlet, 309-water supplementing port, 310-gas inlet hood, 311-gas inlet pipe, 312-inverted U-shaped door opening, 313-manhole, 314-sight glass, 315-gas outlet, 316-connecting plate, 317-marsh gas inlet, 318-overflow port, 4-torch main pipe, 5-pressure transmitter, 6-self-control valve, 7-flame arrester, 8-igniter, 9-flame detection device.
Detailed Description
Referring to fig. 1-5, a biogas combustion system comprising a biogas pressure regulator comprises an anaerobic reaction 1, a biogas torch 2 and a pressure regulator 3, wherein an air inlet of the pressure regulator 3 is connected with a biogas pipeline of the anaerobic reactor 1, an air outlet of the pressure regulator 3 is connected with a main torch pipe 4, and the main torch pipe 4 is connected with the biogas torch 2.
The pressure regulating device 3 comprises a water tank 301, an overflow port 318 is arranged on the upper side of the water tank 301, the overflow port 318 is provided with an overflow weir 304 with adjustable height, and the overflow port 318 is provided with an overflow groove 302. The overflow trough 302 is provided with an overflow trough drain outlet 303, and the top of the overflow trough 302 is provided with a vent 306. A water outlet 305 is arranged below the water tank 301, a gas collecting hood 307 is arranged in the middle of the water tank 301, the outer wall of the gas collecting hood 307 is welded and fixed with the top of the water tank 301, and the lower part of the gas collecting hood 307 is communicated with the water tank 301. The top of the gas collection cover 307 is provided with a methane outlet 308. A water supplementing port 309 is provided on the side of the gas collecting hood 307. The water tank 301 is internally provided with an air inlet cover 310, and the air inlet cover 310 is welded and fixed with the inner wall of the gas collecting cover 307 by virtue of a plurality of connecting plates 316 at the outer side of the air inlet cover 310. The top of the air inlet hood 310 is provided with an air inlet pipe 311 which passes through the upper part of the gas collecting hood 307 and is connected with a methane inlet 317. The lower part of the air inlet cover 310 is communicated with the air collecting cover 307, and inverted U-shaped door openings 312 are arranged at intervals on the edge of the lower part.
The horizontal cross sections of the water tank 301, the gas collecting hood 307 and the gas inlet hood 310 are square or circular, and are generally circular for convenient construction welding. The central axes of the water tank 301, the gas collecting hood 307 and the gas inlet hood 310 coincide.
The working principle of the pressure regulator is as follows: firstly, water is fully filled into the overflow port 303 through the water supplementing port 309, and at the moment, the water level in the air inlet cover 310, the air collecting cover 307 and the water tank 301 is at the same height as the overflow weir 304. When the biogas enters, the pressure on the upper part of the gas inlet cover 310 increases to force the water level in the gas inlet cover 310 to drop, and the lower edge of the gas inlet cover 310 and the lower edge of the gas collecting cover 307 are communicated with the water tank 301, so that the water in the gas collecting cover 307 is finally discharged from the overflow port 303 of the water tank 301. When the water level in the air intake cover 310 falls below the inverted U-shaped door opening 312, the biogas breaks the water seal, enters the upper part of the gas collecting cover 307 from the inverted U-shaped door opening 312, and finally is discharged from the gas outlet 315. The larger the biogas amount is, the lower the water level in the air inlet cover 310 is, the larger the area of the inverted U-shaped door opening 312 through which biogas can pass is, and the stable output of biogas can be ensured. If the outlet line of the gas collection hood 307 is open to the atmosphere at this time, the water level in the gas collection hood 307 remains at the same level as the weir 304. If there is a certain pressure in the outlet pipe of the gas collecting hood 307, the water level in the gas collecting hood 307 is forced to drop, and the water is discharged from the overflow port 303. When intake air is reduced or stopped, water returns from the water tank 301 to the gas collection shroud 307 and the intake shroud 310. The difference in height between inverted U-shaped gate opening 312 and weir 304 determines the pressure that the gas burst seal needs to overcome.
To ensure that the water flow is clear, the lower edge of the gas collection cover 307 is spaced from the bottom of the water tank 301. The lower edge of the air inlet cover 310 is higher than the lower edge of the air collecting cover 307, so that biogas can be prevented from entering the top of the water tank 301 from the lower edge of the air collecting cover 307. The inner wall of the gas collecting hood 307 has a gap with the outer wall of the gas inlet hood 310 to ensure smooth passage of gas. The upper space of the gas collection cover 307 can buffer gas.
For convenience in welding, a manhole 313 is arranged at the top of the gas collecting hood 307, a gas outlet 315 is arranged on the manhole 313, and the manhole 313 is connected with the gas collecting hood 307 through a flange.
The top of the water tank 301 is provided with a sight glass 314 to allow for viewing of the water tank level. The bottom of the water tank 301 can be provided with a foot bolt seat for fixing the device.
The outlet pipeline of the anaerobic reactor 1 is provided with a pressure transmitter 5 for measuring the biogas pressure of the pipeline.
And a bypass pipe is arranged at the upstream of the pressure regulator 3 and connected with a flare ignition tube, and the flare ignition tube is connected with the methane flare 2. The bypass line is provided with a self-controlled valve 6 (ignition valve). The pipe diameter of the torch ignition pipe is smaller than that of the main pipe of the torch.
The main pipe and the ignition pipe are provided with flame arresters 7, and the marsh gas torch 2 is provided with an igniter 8 and a flame detection device 9 and is connected with the pressure transmitter 5 through an ignition control module.
Biogas combustion system operation principle: the operation of the biogas torch 2 is automatically controlled by the biogas pressure. If the pressure reaches the set value, the self-control valve 6 is automatically opened, the igniter 8 is automatically started, and a small fire (auxiliary burner) is ignited. The flame monitoring device 9 will detect the burning situation of the flame and will give an alarm if no flame is detected. If the biogas yield is larger than the combustion amount of small fire, the biogas pressure can rise, when the biogas pressure reaches a certain value, the pressure regulator 3 is broken through to seal water, the biogas enters a main pipe of the torch, and the small fire ignites the large fire (main burner). Then the pressure of the methane slowly drops to a certain value, the methane in the main pipeline of the torch is disconnected, the big fire extinguishes, and the small fire continues to burn. When the biogas pressure is reduced to a set value, the self-control valve 6 is closed, and the biogas torch 2 is extinguished.
Claims (10)
1. The utility model provides a marsh gas combustion system that contains marsh gas pressure regulator, includes anaerobic reactor, marsh gas torch, characterized by: the methane tank also comprises a pressure regulator, wherein an air inlet of the pressure regulator is connected with a methane pipeline of the anaerobic reactor, an air outlet of the pressure regulator is connected with a main pipe of the torch, and the main pipe of the torch is connected with the methane torch.
2. A biogas combustion system comprising a biogas pressure regulator according to claim 1, characterized in that: the pressure regulating device comprises a water tank, an overflow port is formed in an opening at the upper side of the water tank, an overflow weir capable of regulating the height is arranged at the overflow port, and an overflow groove is arranged at the overflow port; the overflow groove is provided with an overflow groove water outlet, and the top of the overflow groove is provided with a vent; the water tank below sets up the outlet, sets up the gas collecting channel in the middle of the water tank, and the outer wall and the water tank top welded fastening of gas collecting channel, gas collecting channel lower part and water tank intercommunication, and the gas collecting channel top has the marsh gas export, and the gas collecting channel lateral part sets up the moisturizing mouth, and the inside inlet hood that sets up of water tank, a plurality of connecting plates and gas collecting channel inner wall welded fastening of gas inlet hood dependence its outside are gone up to the inlet hood top, and the gas inlet hood top has the intake pipe, passes gas collecting channel upper portion and connects the marsh gas import, and the gas collecting channel lower part communicates, and lower part border interval sets up the U-shaped door opening that falls.
3. A biogas combustion system comprising a biogas pressure regulator according to claim 2, characterized in that: the horizontal sections of the water tank, the gas collecting hood and the gas inlet hood are square or round.
4. A biogas combustion system comprising a biogas pressure regulator according to claim 2, characterized in that: the central axes of the water tank, the gas collecting hood and the gas inlet hood are coincident.
5. A biogas combustion system comprising a biogas pressure regulator according to claim 2, characterized in that: the lower edge of the gas collecting hood is higher than the lower edge of the gas collecting hood, and a gap is reserved between the inner wall of the gas collecting hood and the outer wall of the gas collecting hood.
6. A biogas combustion system comprising a biogas pressure regulator according to claim 2, characterized in that: the top of the gas collecting hood is provided with a manhole, the manhole is provided with an air outlet, and the manhole is connected with a flange of the gas collecting hood.
7. A biogas combustion system comprising a biogas pressure regulator according to claim 2, characterized in that: the top of the water tank is provided with a sight glass.
8. A biogas combustion system comprising a biogas pressure regulator according to claim 1, characterized in that: and a pressure transmitter is arranged on an outlet pipeline of the anaerobic reactor.
9. A biogas combustion system comprising a biogas pressure regulator according to claim 1, characterized in that: and a bypass pipe is arranged at the upstream of the pressure regulator and connected with a flare ignition tube, the flare ignition tube is connected with a methane flare, an automatic control valve is arranged on a bypass pipeline, and the pipe diameter of the flare ignition tube is smaller than that of a main pipe of the flare.
10. A biogas combustion system comprising a biogas pressure regulator according to claim 1, characterized in that: the main pipe and the ignition pipe are provided with flame arresters, and the marsh gas torch is provided with an igniter and a flame detection device and is connected with the pressure transmitter through an ignition control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210765396.3A CN117366622A (en) | 2022-07-01 | 2022-07-01 | Biogas combustion system comprising biogas pressure regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210765396.3A CN117366622A (en) | 2022-07-01 | 2022-07-01 | Biogas combustion system comprising biogas pressure regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117366622A true CN117366622A (en) | 2024-01-09 |
Family
ID=89402733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210765396.3A Pending CN117366622A (en) | 2022-07-01 | 2022-07-01 | Biogas combustion system comprising biogas pressure regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117366622A (en) |
-
2022
- 2022-07-01 CN CN202210765396.3A patent/CN117366622A/en active Pending
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