CN108977245B - Aerobic and anaerobic microorganism combined treatment system and method for gas in mine goaf - Google Patents
Aerobic and anaerobic microorganism combined treatment system and method for gas in mine goaf Download PDFInfo
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- CN108977245B CN108977245B CN201810759271.3A CN201810759271A CN108977245B CN 108977245 B CN108977245 B CN 108977245B CN 201810759271 A CN201810759271 A CN 201810759271A CN 108977245 B CN108977245 B CN 108977245B
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/04—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by injection or suction, e.g. using pipettes, syringes, needles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/06—Fluids used for spraying
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/59—Biological synthesis; Biological purification
Abstract
The invention discloses a system and a method for the combined treatment of aerobic and anaerobic microorganisms for gas in a mine goaf. The system comprises an aerobic methane-oxidizing bacteria agent spraying system and an anaerobic methane-oxidizing bacteria agent spraying system; the components comprise a storage tank of methane-oxidizing bacteria agent, a pressure pump, a spraying pipe network, a nozzle and the like; the storage tank of the methane-oxidizing bacteria agent is connected with the input end of the pressure pump, the output end of the pressure pump is connected with the spraying pipe network, and the spraying pipe network is connected with the nozzle to form a spraying system. The method comprises the following steps: (1) cultivating aerobic and anaerobic methane-oxidizing bacteria; (2) the aerobic methane oxidation bacteria agent spraying pipe network system is arranged; (3) the anaerobic methane oxidation bacteria agent spraying pipe network system is arranged; (4) regularly spraying methane-oxidizing bacteria and culture solution; (5) and (5) effect inspection. According to the invention, methane oxidizing bacteria agent and culture solution thereof are regularly sprayed to the goaf, and methane is removed by utilizing microbial metabolism, so that the gas danger of the goaf is reduced.
Description
Technical Field
The invention relates to a system and a method for the combined treatment of aerobic and anaerobic microorganisms for gas in a mine goaf, belonging to the technical field of coal mine gas treatment.
Background
The rapid and sustainable development of the economy of China has more and more large demand on coal. At present, shallow coal resources are nearly exhausted, and many coal mines begin to enter deep mining. Along with the increase of the mining depth, gas disasters become more serious day by day, and the difficulty of coal mine gas control is increasing continuously. And after the working surface is recovered, the roof rock stratum falls to form a goaf, the range of the goaf is large, and the goaf is continuously increased along with the recovery of the working surface. Meanwhile, the residual coal in the goaf is continuously oxidized under the influence of air leakage and gas extraction, a heat storage environment exists, spontaneous combustion occurs after the temperature condition is met, gas explosion in the goaf is caused, and serious accidents are caused, so the goaf is a key area for preventing and controlling gas disasters in the underground coal mine.
At present, the main treatment technology of coal mine gas in China is the prediction of coal seam gas content and emission quantity, mine ventilation, mine gas drainage and four-in-one comprehensive outburst prevention measures. The method mainly comprises the steps of gas drainage at an upper corner, high-concentration pressure relief gas drainage at a goaf by drilling a mining face air return roadway, high-position gas drainage at a mining face, high-concentration gas drainage at the goaf by drilling on the ground and the like. Although the effect is obvious, because the geological structure of the coal seam is complex and the air permeability of the coal seam is poor in China, the gas disaster in the coal mine goaf is still not thoroughly controlled, and heavy and extra-large gas accidents happen occasionally. In recent years, with the continuous development of scientific technology, the research result of microbial technology is getting larger and larger, and the technology for degrading coal mine gas by using microbial technology is increasingly paid attention by scholars at home and abroad.
Disclosure of Invention
The invention aims to provide a system and a method for treating gas in a mine goaf by combining aerobic microorganisms and anaerobic microorganisms.
In the invention, the methane-oxidizing bacteria are microorganisms taking methane as the only carbon source and energy source, the methane is oxidized into methanol under the action of Methane Monooxygenase (MMO), and the methanol is further oxidized into formaldehyde. Part of the formaldehyde produced is synthesized into cellular material via the serine pathway or via the pentose diphosphate pathway. The other part of formaldehyde is converted into formic acid under the action of formaldehyde dehydrogenase, and the formic acid is further oxidized and decomposed into CO2And H2And returning the O to the atmospheric carbon reservoir.
The invention provides a combined treatment system for aerobic and anaerobic microorganisms of gas in a mine goaf, which comprises an aerobic methane-oxidizing bacteria agent spraying system and an anaerobic methane-oxidizing bacteria agent spraying system;
the aerobic methane oxidation bacteria agent spraying system comprises a storage tank of the aerobic methane oxidation bacteria agent, a pressure pump, a spraying pipe network and a nozzle, wherein the storage tank of the aerobic methane oxidation bacteria agent is arranged on the return air crossheading flat rail car and is connected with the input end of the pressure pump, the output end of the pressure pump is connected with the spraying pipe network, and the spraying pipe network is connected with the nozzle arranged at the rear part of the hydraulic support;
anaerobic methane oxidation bacteria agent sprinkling system is including arranging the first anaerobic methane oxidation bacteria agent sprinkling system in the air inlet crossheading and arranging the second anaerobic methane oxidation bacteria agent sprinkling system in the return air crossheading:
a. the first anaerobic methane oxidation bacteria agent spraying system comprises a storage tank of a first anaerobic methane oxidation bacteria agent, a first anaerobic pressure pump, a first anaerobic spraying pipe network and a nozzle, wherein the storage tank of the first anaerobic methane oxidation bacteria agent is arranged at the corner of the air inlet main roadway close to the working face, the storage tank is connected with the input end of the first anaerobic pressure pump, the output end of the first anaerobic pressure pump is connected with the first anaerobic spraying pipe network, and the first anaerobic spraying pipe network is connected with the nozzle;
b. the second anaerobism methane-oxidizing bacteria microbial inoculum sprinkler system includes the storage tank of second anaerobism methane-oxidizing bacteria microbial inoculum, second anaerobism force (forcing) pump, pipe network and nozzle are sprayed to the second anaerobism, the storage tank of second anaerobism methane-oxidizing bacteria microbial inoculum arranges that it is close to the working face corner in the big lane of return air, this storage tank links to each other with the input of second anaerobism force (forcing) pump, the pipe network is sprayed with the second anaerobism to second anaerobism force (forcing) pump output, the pipe network is sprayed with the nozzle to the second anaerobism and links to each other.
The spraying pipe network is formed by nesting an inner layer and an outer layer, the outer layer is a water pipe added with an antistatic agent, the inner layer is a stainless steel pipe, and a rotatable piston valve is arranged in the joint of the injection pipe and the spray head.
The inner layer of the spraying pipe network is a bacteria liquid injection pipe, and the outer layer is a culture liquid injection pipe. When the spraying system injects the methane oxidizing bacteria agent, the rotatable piston valve is opened outwards under the influence of the injection pressure of the bacteria liquid injection pipe, and the bacteria liquid enters the spray head through the pipeline interface, so that the bacteria liquid is sprayed; when the spraying system injects the culture solution, the rotatable piston valve is closed inwards under the influence of the injection pressure of the culture solution injection pipe, and the culture solution enters the spray head through the pipeline interface, so that the culture solution is sprayed.
In the spraying pipe network, the coal pillars of the air inlet crossheading and the air return crossheading on the working face are respectively slotted 200-400 mm away from the top plate, one spray head is arranged at intervals of 20-30 m, and the distance between the spray head and the roadway side is 100-300 mm.
The invention provides a spraying method for treating gas in a coal mine goaf by adopting the system, which comprises the following steps:
i, cultivating aerobic and anaerobic methane oxidation bacteria: collecting the gas enrichment data of the goaf of the target coal mine, and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria which meet the gas treatment requirement of the target coal mine;
II, arranging an aerobic methane oxidation bacterium agent spraying pipe network system: arranging a storage tank, a pressure pump, a spraying pipe network and a nozzle of an aerobic methane oxidation bacterium agent in a hydraulic support and a return air crossheading of a target coal mine preparation working surface;
III, anaerobic methane oxidation bacteria agent spraying pipe network system arrangement: arranging a storage tank, a pressure pump, a spraying pipe network and a nozzle of an anaerobic methane oxidation bacterium agent on the wall of an air inlet main roadway, the wall of an air inlet gateway roadway, an air return main roadway and the wall of an air return gateway roadway of a target coal mine preparation working face;
IV, periodically spraying a methane-oxidizing bacterium agent and a culture solution: spraying the microbial inoculum obtained in the step I and corresponding culture solution into the goaf through a spraying pipe network system under certain pressure; the injection pressure is 3-6 MPa, and the spraying process is as follows: according to the cycle, firstly injecting a microbial inoculum and then injecting a culture solution;
v, effect inspection: the gas content in the goaf is detected through the beam tube system, and the biological control effect of the gas in the goaf is determined.
The spraying method specifically comprises the following steps:
(1) collecting existing data of gas in a target coal mine goaf, and collecting data of gas enrichment, distribution and concentration in an important way;
(2) respectively screening and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria from the soil environment around the wetland and the coal mine by taking the concentration range of the gas in the goaf of the target coal mine as an enrichment condition;
(3) the arrangement process of the aerobic methane oxidation bacteria agent spraying pipe network system in the target mine is as follows: a storage tank and a pressure pump of the aerobic methane oxidation bacterium agent are arranged on a return air crossheading flat-plate railcar of a working face of a target mine and move to supply liquid along with the propulsion of the working face; the spraying pipe network is arranged on the working face of a target mine and in the return air gateway and is respectively arranged along the tracks of the working face hydraulic support and the return air gateway flat rail car; the nozzles are arranged on a spraying pipe network at the position of the working face hydraulic support and face the goaf;
(4) the arrangement process of the anaerobic methane oxidation bacteria agent spraying pipe network system in a target mine is as follows: anaerobic methane oxidation fungus agent sprinkler system is including arranging the first anaerobic methane oxidation fungus agent sprinkler system in the air inlet crossheading and arranging the second anaerobic methane oxidation fungus agent sprinkler system in the return air crossheading:
a. the storage tank and the pressure pump of the first anaerobic methane-oxidizing bacteria agent are respectively arranged at the corner of an air inlet roadway of a target mine, which is far away from a working face air inlet crossheading, and supply liquid for a first spraying pipe network of the air inlet crossheading, and the first anaerobic spraying pipe network is arranged in the wall of the air inlet crossheading, is slotted before stoping is started and is embedded into the first anaerobic spraying pipe network; the nozzle is arranged above the first anaerobic spraying pipe network of the air inlet crossheading and faces the goaf;
b. a storage tank and a pressure pump of a second anaerobic methane-oxidizing bacteria agent are respectively arranged at the corner of the return airway of the target mine, which is far away from the return air gateway of the working face, and supply liquid for a second spraying pipe network of the return air gateway, and the second anaerobic spraying pipe network is arranged in the wall of the tunnel of the return air gateway, is slotted before the start of stoping and is embedded into the second anaerobic spraying pipe network; the nozzle is arranged above the second anaerobic spraying pipe network of the air inlet crossheading and faces the goaf;
(5) spraying: the anaerobic spraying system and the aerobic spraying system synchronously spray;
after stoping is started, the nozzle is kept in an open state, and aerobic methane oxidizing bacteria is sprayed to a goaf near a working face periodically;
sequentially opening nozzles of an anaerobic methane oxidation bacterium agent spraying pipe network system along with the advance of the working face, and periodically spraying the anaerobic methane oxidation bacterium agent to the goaf;
(6) effect inspection, namely selecting 1-2 sampling points every 30-50 m according to various parameters of a target mine goaf and embedding the sampling points into a monitoring pipeline; the gas content in the goaf is detected by a beam tube monitoring system every working day, so that the biological control effect is determined.
In the spraying method, when the aerobic methane oxidation bacterium agent or the anaerobic methane oxidation bacterium agent and the culture solution are regularly sprayed, the time is controlled as follows: and respectively injecting the methane-oxidizing bacteria agent and the culture solution for 1-3 h in the first working day of the first week every month, and then injecting the culture solution for 1-3 h in the first working day of the third week every month, wherein the cycle is one month.
Further, the injection amount of the methane-oxidizing bacteria agent and the culture solution is 0.5-1 m3The injection amount of a single spray head culture solution is 1-3 m3The injection pressure is 3-6 Mpa.
The invention has the beneficial effects that:
(1) the method effectively solves the problem of gas accumulation in the goaf by utilizing the characteristic that methane is grown by using methane oxidizing bacteria as a unique carbon source and energy and utilizing the biodegradation of the methane oxidizing bacteria to the methane, and provides an effective way for preventing and controlling gas disasters in the goaf of the coal mine.
(2) The harm of microorganisms to the environment is small, and the greenhouse effect of methane is 20-30 times of that of carbon dioxide, so that methane is converted into microorganism life substances and fixed under the action of methane oxidizing bacteria, and the methane-oxidizing bacteria have an important effect on reducing the methane content in the atmosphere and relieving the global greenhouse effect.
(3) According to the invention, aerobic and anaerobic methane oxidizing bacteria are respectively utilized to carry out biodegradation on the gas in the oxygen-rich area close to the working surface of the goaf and the gas in the suffocation area deep in the goaf, so that the full coverage from the aerobic area to the anoxic area of the goaf is realized, the gas removal effect on the goaf is obvious, and the gas danger of the goaf can be reduced, thereby realizing biological treatment of the gas in the goaf.
Drawings
FIG. 1 is a schematic diagram of the arrangement of a spraying pipe network of a working face for backup mining of the technology for treating gas in a coal mine goaf by using microorganisms;
FIG. 2 is a schematic diagram of a longitudinal section structure of a rotatable piston for injecting microbial inoculum and culture solution respectively by using 1 pipeline in the present invention;
FIG. 3 is a sectional view of a rotatable piston for injecting microbial inoculum and culture solution separately using 1 pipe according to the present invention, taken along the line I-I of FIG. 2;
in the figure, 1, an air inlet lane, 2, a storage tank of a first anaerobic methane oxidation bacterium agent, 3, a first anaerobic pressure pump, 4, an air return lane, 5, an air inlet crossheading, 6, a return air crossheading, 7, a first anaerobic spraying pipe network, 8, a first anaerobic spraying nozzle, 9, a working surface, 10, a goaf, 11, a pressure pump, 12, a storage tank of an aerobic methane oxidation bacterium agent, 13, a spraying pipe network, 14, a hydraulic support, 15, a nozzle, 16, a storage tank of a second anaerobic methane oxidation bacterium agent, 17, a second anaerobic pressure pump, 18, a second anaerobic spraying pipe network, 19, a second anaerobic spraying system nozzle, 20, a rotatable piston valve, 21, a water pipe, 22 and a stainless steel pipe.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
as shown in fig. 1, 2 and 3, the system for treating gas in a mine goaf by combining aerobic microorganisms and anaerobic microorganisms comprises an aerobic methane-oxidizing bacteria agent spraying system and an anaerobic methane-oxidizing bacteria agent spraying system.
The aerobic methane oxidation bacteria agent spraying system is composed of a storage tank 12 of an aerobic methane oxidation bacteria agent, a movable pressure pump 11, a working surface spraying pipe network 13, a nozzle 15 arranged behind a hydraulic support and the like, wherein the storage tank 12 of the aerobic methane oxidation bacteria agent arranged on the return air crossheading 6 flat track car is connected with the input end of the movable pressure pump 11, the output end of the movable pressure pump 11 is connected with the working surface spraying pipe network 13, and the spraying pipe network is connected with the nozzle 15 behind the hydraulic support to form the aerobic methane oxidation bacteria agent spraying system.
Anaerobic methane oxidation bacteria agent sprinkling system is including arranging the first anaerobic methane oxidation bacteria agent sprinkling system at air inlet crossheading 5 and arranging the second anaerobic methane oxidation bacteria agent sprinkling system at return air crossheading 6:
a. the first anaerobic methane oxidation bacteria agent spraying system comprises a storage tank 2 of a first anaerobic methane oxidation bacteria agent, a first anaerobic pressure pump 3, a first anaerobic spraying pipe network 7, a first anaerobic spraying nozzle 8 and the like, wherein the storage tank 2 of the first anaerobic methane oxidation bacteria agent, which is arranged at a position 50m away from a corner of a 133 fully mechanized caving face of an air intake tunnel 1, is connected with the input end of the first anaerobic pressure pump 3, the output end of the first anaerobic pressure pump 3 is connected with the first anaerobic spraying pipe network 7, and the first anaerobic spraying pipe network 7 is connected with the first anaerobic spraying nozzle 8 to form the first anaerobic methane oxidation bacteria agent spraying system;
b. the second anaerobic methane oxidation bacteria agent spraying system comprises a second anaerobic methane oxidation bacteria agent storage tank 16, a second anaerobic pressure pump 17, a second anaerobic spraying pipe network 18, a second anaerobic spraying system nozzle 19 and the like, the second anaerobic methane oxidation bacteria agent storage tank 16 arranged at the position of the 4 th air return roadway away from the corner of the 133 th fully mechanized caving face by 50m is connected with the input end of the second anaerobic pressure pump 17, the output end of the second anaerobic pressure pump 17 is connected with the second anaerobic spraying pipe network 18, and the second anaerobic spraying pipe network 18 is connected with the second anaerobic spraying system nozzle 19 to form the second anaerobic methane oxidation bacteria agent spraying system.
The outer layer of the spraying pipe network is a water pipe 21 added with an antistatic agent, the inner layer is a stainless steel pipe 22, the inner layer and the outer layer are nested, and a rotatable piston valve 20 is arranged in the joint of the injection pipe and the spray head. The inner layer is a bacteria liquid injection pipe, and the outer layer is a culture liquid injection pipe. When the spraying system is injected with the methane-oxidizing bacteria agent, the rotatable piston valve 20 rotates outwards to the joint with the outer pipeline under the influence of the injection pressure of the inner pipe, and the bacteria liquid enters the spray head through the pipeline interface, so that the bacteria liquid is sprayed; when the spraying system injects the culture solution, under the influence of the injection pressure of the outer pipe, the rotatable piston valve rotates inwards to the joint with the inner layer pipeline, and the culture solution enters the spray head through the pipeline interface, so that the culture solution is sprayed.
The spraying pipe network is provided with slots and nozzles, the air inlet and return air crossheading coal pillars on the working face are respectively provided with a slot 300 mm away from the top plate, the nozzles are arranged every 25 m, and the nozzles are 200 mm away from the roadway side.
The method for carrying out spraying treatment by adopting the aerobic and anaerobic microorganism combined treatment system for the gas in the mine goaf comprises the following steps:
i, cultivating aerobic and anaerobic methane oxidation bacteria: collecting the gas enrichment data of the goaf of the target coal mine, and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria which meet the gas treatment requirement of the target coal mine;
II, arranging an aerobic methane oxidation bacterium agent spraying pipe network system: a hydraulic support 14 of a target coal mine preparation working surface 9, a storage tank 12 of an aerobic methane oxidation bacterium agent, a pressure pump 11, a spraying pipe network 13, a nozzle 15 and the like are arranged in a return air crossheading 6;
III, anaerobic methane oxidation bacteria agent spraying pipe network system arrangement: a storage tank 2 of a first anaerobic methane oxidation bacteria agent, a first anaerobic booster pump 3, a first anaerobic spray pipe network 7, a first anaerobic spray nozzle 8 and the like are arranged on the walls of an air inlet lane 1, an air inlet gateway 5 lane, an air return lane 4 and an air return gateway 6 lane of a target coal mine preparation working surface 9;
IV, periodically spraying a methane-oxidizing bacterium agent and a culture solution: spraying the microbial inoculum obtained in the step I and corresponding culture solution into the goaf 10 through a spraying pipe network system under certain pressure;
v, effect inspection: the gas content in the goaf is detected through the beam tube system, and the biological control effect of the gas in the goaf is determined.
The spraying method adopting the spraying system for the aerobic and anaerobic microorganism combined treatment of the gas in the mine goaf specifically comprises the following steps:
(1) collecting existing data of gas in a target coal mine goaf, and collecting data such as gas enrichment, distribution and concentration in an important way;
(2) respectively screening and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria from environments such as wetland, coal mine surrounding soil and the like by taking the concentration range of the gas in the target coal mine goaf as an enrichment condition;
(3) the arrangement of the aerobic methane oxidation bacteria agent spraying pipe network system in a target mine is as follows: a storage tank 12 and a pressure pump 11 of the aerobic methane oxidation bacterium agent are arranged on the flat-bed rail car of the return air gateway 6 of the working face of the target mine and move to supply liquid along with the propulsion of the working face 9; the spraying pipe network 13 is arranged in the target mine working face 9 and the return air crossheading 6 and is respectively arranged along the working face hydraulic support 14 and the return air crossheading 6 flat rail car track; the nozzle 15 is arranged on the spraying pipe network behind the working face hydraulic support 14 and faces the goaf 10, is normally opened after stoping begins, and regularly sprays aerobic methane oxidation bacteria agent to the goaf near the working face.
(4) The arrangement of the anaerobic methane oxidation bacteria agent spraying pipe network system in a target mine is as follows: anaerobic methane oxidation bacteria agent sprinkling system is including arranging the first anaerobic methane oxidation bacteria agent sprinkling system at air inlet crossheading 5 and arranging the second anaerobic methane oxidation bacteria agent sprinkling system at return air crossheading 6:
a. the storage tank 2 and the first anaerobic pressure pump 3 of the first anaerobic methane-oxidizing bacteria agent are respectively arranged at the position, 50m away from the corner of an air inlet crossheading of a 133 fully mechanized caving face 9, of an air inlet roadway 1 of a target mine, supply liquid for a first anaerobic spray pipe network 7 of the air inlet crossheading 5, the first anaerobic spray pipe network 7 is arranged in the wall of the roadway of the air inlet crossheading 5, and is grooved before stoping is started and embedded into the first anaerobic spray pipe network 7; the first anaerobic spraying nozzles 8 are arranged on the first anaerobic spraying pipe network 7 of the air inlet crossheading, face the goaf 10, are opened in sequence along with the advance of the working face, and periodically spray anaerobic methane oxidation bacteria on the goaf;
b. a storage tank 16 of a second anaerobic methane-oxidizing bacteria agent and a second anaerobic pressure pump 17 are respectively arranged at the position of 50m away from the air return gateway corner of the 133 fully mechanized caving face 9 of the target mine air return tunnel 4 and supply liquid for a second anaerobic spray pipe network 18 of the air return gateway 6, the second anaerobic spray pipe network 18 is arranged in the wall of the air return gateway 6, a groove is formed before the stoping is started, and the second anaerobic spray pipe network 18 is buried; and the second anaerobic spraying system nozzle 19 is arranged on the air inlet crossheading second anaerobic spraying pipe network 18, faces the goaf 10, is opened in sequence along with the propulsion of the working face, and periodically sprays anaerobic methane oxidation bacteria on the goaf.
(5) The methane-oxidizing bacteria agent and the culture solution are regularly sprayed, the methane-oxidizing bacteria agent and the culture solution are respectively injected into the first working day of the first week of each month for 2 hours, then the culture solution is injected into the first working day of the third week for 2 hours, and each month is a cycle. The cycle can be ended after a plurality of times.
(6) Methane-oxidizing bacteria agent and culture solution are injected, and the injection amount of single-nozzle bacteria solution is 1m3Per, the injection amount of the culture solution of a single nozzle is 2 m3The injection pressure was 4 MPa.
(7) And (4) effect inspection, namely selecting 1 sampling point every 40m according to each parameter of the goaf of the target mine and burying the sampling points into the monitoring pipeline. The gas content in the goaf is detected by a beam tube monitoring system every working day, so that the biological control effect is determined.
By adopting the method, aerobic and anaerobic methane oxidizing bacteria carry out biodegradation on gas in an oxygen-rich area close to a working face of the goaf and a suffocation area deep in the goaf, so that the goaf is completely covered from an aerobic area to an anoxic area, the gas in the goaf is obviously removed, the gas danger in the goaf can be reduced, and the biological treatment of the gas in the goaf is realized.
Claims (9)
1. An aerobic and anaerobic microorganism combined treatment system for mine goaf gas is characterized in that: comprises an aerobic methane oxidation bacterium agent spraying system and an anaerobic methane oxidation bacterium agent spraying system; the aerobic methane oxidation bacterium agent spraying system comprises a storage tank for the aerobic methane oxidation bacterium agent, a pressure pump, a spraying pipe network and a nozzle; the anaerobic methane oxidation bacteria agent spraying system comprises two groups of spraying pipe networks, wherein each group of spraying pipe networks comprises a storage tank for the anaerobic methane oxidation bacteria agent, an anaerobic pressure pump, an anaerobic spraying pipe network and a nozzle;
the aerobic methane oxidation bacteria agent spraying system comprises a storage tank, a pressure pump, a spraying pipe network and a nozzle of the aerobic methane oxidation bacteria agent, wherein the storage tank of the aerobic methane oxidation bacteria agent is arranged on a return air crossheading flat rail car, the storage tank is connected with the input end of the pressure pump, the output end of the pressure pump is connected with the spraying pipe network, and the spraying pipe network is connected with the nozzle arranged at the rear part of the hydraulic support.
2. The system for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas according to claim 1, wherein: anaerobic methane oxidation bacteria agent sprinkling system is including arranging the first anaerobic methane oxidation bacteria agent sprinkling system in the air inlet crossheading and arranging the second anaerobic methane oxidation bacteria agent sprinkling system in the return air crossheading:
a. the first anaerobic methane oxidation bacteria agent spraying system comprises a storage tank of a first anaerobic methane oxidation bacteria agent, a first anaerobic pressure pump, a first anaerobic spraying pipe network and a nozzle, wherein the storage tank of the first anaerobic methane oxidation bacteria agent is arranged at the corner of the air inlet main roadway close to the working face, the storage tank is connected with the input end of the first anaerobic pressure pump, the output end of the first anaerobic pressure pump is connected with the first anaerobic spraying pipe network, and the first anaerobic spraying pipe network is connected with the nozzle;
b. the second anaerobism methane-oxidizing bacteria microbial inoculum sprinkler system includes the storage tank of second anaerobism methane-oxidizing bacteria microbial inoculum, second anaerobism force (forcing) pump, pipe network and nozzle are sprayed to the second anaerobism, the storage tank of second anaerobism methane-oxidizing bacteria microbial inoculum arranges that it is close to the working face corner in the big lane of return air, this storage tank links to each other with the input of second anaerobism force (forcing) pump, the pipe network is sprayed with the second anaerobism to second anaerobism force (forcing) pump output, the pipe network is sprayed with the nozzle to the second anaerobism and links to each other.
3. The system for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas according to claim 1, wherein: the spraying pipe network is formed by nesting an inner layer and an outer layer, the outer layer is a PVC pipe added with an antistatic agent, the inner layer is a stainless steel pipe, and a rotatable piston valve is arranged in the joint of the spraying pipe network and the spray head.
4. The system of claim 3 for the aerobic and anaerobic microorganism combined treatment of mine goaf gas, wherein: the inner layer of the spraying pipe network is a bacteria liquid injection pipe, and the outer layer is a culture liquid injection pipe.
5. The system for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas according to claim 1, wherein: the spraying pipe network is formed by slotting on the walls of the roadway on the two sides of the air inlet crossheading and the air return crossheading, the coal pillars of the air inlet crossheading and the air return crossheading on the working face are respectively slotted 200-400 mm away from the top plate, one spray head is arranged at intervals of 20-30 m, and the distance between each spray head and the roadway side is 100-300 mm.
6. An aerobic and anaerobic microorganism combined treatment method for mine goaf gas, which adopts the aerobic and anaerobic microorganism combined treatment system for mine goaf gas as claimed in any one of claims 1-5, and is characterized in that: the method comprises the following steps:
i, cultivating aerobic and anaerobic methane oxidation bacteria: collecting the gas enrichment data of the goaf of the target coal mine, and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria which meet the gas treatment requirement of the target coal mine;
II, arranging an aerobic methane oxidation bacterium agent spraying pipe network system: arranging a storage tank, a pressure pump, a spraying pipe network and a nozzle of an aerobic methane oxidation bacterium agent in a hydraulic support and a return air crossheading of a target coal mine preparation working surface;
III, anaerobic methane oxidation bacteria agent spraying pipe network system arrangement: arranging a storage tank, a pressure pump, a spraying pipe network and a nozzle of an anaerobic methane oxidation bacterium agent on the wall of an air inlet main roadway, the wall of an air inlet gateway roadway, an air return main roadway and the wall of an air return gateway roadway of a target coal mine preparation working face;
IV, periodically spraying a methane-oxidizing bacterium agent and a culture solution: spraying the microbial inoculum obtained in the step I and corresponding culture solution into the goaf through a spraying pipe network system under certain pressure;
the injection pressure is 3-6 MPa, and the spraying process is as follows: according to the cycle, firstly injecting a microbial inoculum and then injecting a culture solution;
v, effect inspection: the gas content in the goaf is detected through the beam tube system, and the biological control effect of the gas in the goaf is determined.
7. The method for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas as claimed in claim 6, wherein: the method comprises the following steps:
(1) collecting existing data of gas in a target coal mine goaf, and collecting data of gas enrichment, distribution and concentration in an important way;
(2) respectively screening and culturing aerobic methane-oxidizing bacteria and anaerobic methane-oxidizing bacteria from the soil environment around the wetland and the coal mine by taking the concentration range of the gas in the goaf of the target coal mine as an enrichment condition;
(3) the arrangement process of the aerobic methane oxidation bacteria agent spraying pipe network system in the target mine is as follows: a storage tank and a pressure pump of the aerobic methane oxidation bacterium agent are arranged on a return air crossheading flat-plate railcar of a working face of a target mine and move to supply liquid along with the propulsion of the working face; the spraying pipe network is arranged on the working face of a target mine and in the return air gateway and is respectively arranged along the tracks of the working face hydraulic support and the return air gateway flat rail car; the nozzles are arranged on a spraying pipe network at the position of the working face hydraulic support and face the goaf;
(4) the arrangement process of the anaerobic methane oxidation bacteria agent spraying pipe network system in a target mine is as follows: anaerobic methane oxidation fungus agent sprinkler system is including arranging the first anaerobic methane oxidation fungus agent sprinkler system in the air inlet crossheading and arranging the second anaerobic methane oxidation fungus agent sprinkler system in the return air crossheading:
a. the storage tank and the pressure pump of the first anaerobic methane-oxidizing bacteria agent are respectively arranged at the corner of an air inlet roadway of a target mine, which is far away from a working face air inlet crossheading, and supply liquid for a first spraying pipe network of the air inlet crossheading, and the first anaerobic spraying pipe network is arranged in the wall of the air inlet crossheading, is slotted before stoping is started and is embedded into the first anaerobic spraying pipe network; the nozzle is arranged above the first anaerobic spraying pipe network of the air inlet crossheading and faces the goaf;
b. a storage tank and a pressure pump of a second anaerobic methane-oxidizing bacteria agent are respectively arranged at the corner of the return airway of the target mine, which is far away from the return air gateway of the working face, and supply liquid for a second spraying pipe network of the return air gateway, and the second anaerobic spraying pipe network is arranged in the wall of the tunnel of the return air gateway, is slotted before the start of stoping and is embedded into the second anaerobic spraying pipe network; the nozzle is arranged above the second anaerobic spraying pipe network of the air inlet crossheading and faces the goaf;
(5) spraying: the anaerobic spraying system and the aerobic spraying system synchronously spray;
after stoping is started, the nozzle is kept in an open state, and aerobic methane oxidizing bacteria is sprayed to a goaf near a working face periodically;
sequentially opening nozzles of an anaerobic methane oxidation bacterium agent spraying pipe network system along with the advance of the working face, and periodically spraying the anaerobic methane oxidation bacterium agent to the goaf;
(6) effect inspection, namely selecting 1-2 sampling points every 30-50 m according to various parameters of a target mine goaf and embedding the sampling points into a monitoring pipeline; the gas content in the goaf is detected by a beam tube monitoring system every working day, so that the biological control effect is determined.
8. The method for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas as claimed in claim 7, wherein: when the aerobic methane oxidation bacteria agent or the anaerobic methane oxidation bacteria agent and the culture solution are regularly sprayed, the time is controlled as follows: and respectively injecting the methane-oxidizing bacteria agent and the culture solution for 1-3 h in the first working day of the first week every month, and then injecting the culture solution for 1-3 h in the first working day of the third week every month, wherein the cycle is one month.
9. The method for the aerobic and anaerobic microorganism combined treatment of the mine goaf gas as claimed in claim 8, wherein: the methane oxidation bacterium agent and the culture solution are injected, and the injection amount of the bacterium solution of a single spray head is 0.5-1 m3The injection amount of a single spray head culture solution is 1-3 m3The injection pressure is 3-6 MPa.
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| CN111472831A (en) * | 2020-04-16 | 2020-07-31 | 山东科技大学 | Biological stopping agent for preventing coal from spontaneous combustion and preparation method thereof |
| CN113738436B (en) * | 2021-09-22 | 2023-05-26 | 太原理工大学 | Old-goaf coal bed gas ground extraction oxygen consumption microorganism fire prevention and extinguishing system and method |
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