CN101158286B - Coal mine light concentration mash gas safety conveying method and conveying system - Google Patents
Coal mine light concentration mash gas safety conveying method and conveying system Download PDFInfo
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Abstract
The invention relates to a safe transferring plan and transferring system used for transferring a low-concentration gas in a coal mine. The invention is characterized in that water continuously flows around an inner wall of a ground positive-pressure gas transferring pipeline to form an annular flow, and the low-concentration gas flows in an annular water seal formed by the annular flow, and the gas flow is obstructed by a column water-group arranged at intervals on the gas transferring direction to form an end-face water seal of the gas, then the low-concentration gas forms an intermittent plunger gas flow in the annular water flow and the end-face water seal. The arrangement of the transferring system of the invention is comparatively simple and is easy for operation, and the energy-cost is low and the gas-supply pressure is stable, and the rest gas can be dispelled automatically, so as to guarantee that the extracting pump can work normally with a safe and reliable capability and abetter dehydration effect.
Description
Technical field
The present invention relates to the safety conveying method and the transporting system of gas, more specifically saying so is used for coal mine light concentration mash gas is effectively utilized the safety conveying method and the transporting system of the low concentration gas that is adopted.
Background technique
Coal mine gas is the major hidden danger of Safety of Coal Mine Production always, also is the associated resources and the clear energy sources in coalfield simultaneously, and gas pumping is the approach that effects a permanent cure of control coal mine gas disaster.Coal mine gas is administered scientifically and rationally, exploited and utilizes, both can reduce the coal mine gas disaster accident, transform harm into treasure again, create economic value.
Improvement, exploitation and utilization for coal mine gas all need gas is carried out safe transport, and the low concentration gas difficult point of safe transport especially.
Because concentration range has explosion risk at 5%～16% gas,, be under an embargo usually and directly utilize for security consideration." safety regulations in coal mine " regulation, when coal mine gas utilized, methane concentration must not be lower than 30%.According to statistics, China's coal-mine gas pumping amount in 2005 reaches more than 30 hundred million m
3, wherein 2/3 for methane concentration is lower than 30% low concentration gas, and diffuse by emptying owing to be under an embargo utilization for this part gas, not only wastes resource but also endanger environment, also is the lower main cause of coal mine gas utilization ratio.Yet the gas density that can do work exactly is exactly between 5%～16%, no matter be burning, still detonation is all like this in cylinder, even if high concentration gas or rock gas could form burning and detonation after also must fully mixing with air or contact.
Obviously,, bringing great difficulty, be still in the world a great problem that thoroughly solves as yet so far because of the safety problem that exists in the conveying though coal mine light concentration mash gas can be utilized, developed country is defined in internal combustion type gas electricity concentration all the time＞and 30%.If the conveying of coal mine light concentration mash gas is converted into essential safe type, be undoubtedly the quantum jump in the gas utilization, gas utilization amount and utilization ratio will increase substantially, and social economic benefit will be very remarkable.
At present, carried thin water smoke safe transport mode has been arranged by the coal mine light concentration mash gas essential safe type of type approval test, Xie Yikuang low concentration gas power station, Huainan utilizes the commencement of commercial operation of thin water smoke safe transport, the thin water smoke of its low concentration gas is carried and the generator operation parameter: gas density is 7%～16%, gas pressure is 0.01Mpa, and the source pressure of thin water smoke is 1Mpa.Facts have proved that this is a kind of essential safe type mode of movement, and the low concentration gas generating is more steady than the operation meeting of high concentration gas generating.But thin water smoke safe transport has following problem:
1, dehydration effect directly influences generating efficiency, and thin water smoke safe transport dehydration is difficulty relatively, though after the process secondary dewaters in the practical application, still have water of condensation, refrigeration and whirlwind dehydration can be dealt with problems in theory, but system is too complicated.
2, low concentration gas may be in the range of explosion interval in conveying, forbid to build a jar buffer storage, but owing to have mismatch between gas pumping pump extraction amount and the gas utilization facility utilization, should unnecessary gas be diffused in the practical application, guarantee the supply gas pressure of gas utilization facility again, both can not coordinate each other.
3, the nozzle of thin water smoke safe transport decision atomizing effect, but, easily cause spray nozzle encrustation because the condensed water in the coal mine gas pipeline contains calcium ion, plug nozzle influences atomizing effect, and thin water smoke was lost efficacy.
4, thin water smoke safe transport is used disc type flame trap back-fire relief, and it is little by the gap, and drag losses is big when normally using, in case fouling or dust stop up, will make thrashing.
Theoretical research has obtained proving water vapor safe transport mode.Add the water vapor of 30% above volume fraction in coal mine gas, gas density at all events is worth, and all will lose the characteristic of burning and blast.Utilize this characteristic, can realize the conveying of coal mine light concentration mash gas water vapor essential safe type.Concrete application can be to utilize the waste heat of gas electricity to obtain water vapor, adds in the gas conveyance conduit and goes, to reach the purpose that essential safe type is carried.Utilize the gas electricity utilizing waste heat for refrigeration to obtain cold again, the mixed gas of gas and water vapour is dewatered, recover the character that fires of gas, supply with the gas electricity unit generation.But the system support of practical application is quite complicated, needs equipment waste heat system water vapour system, utilizing waste heat for refrigeration system, and before the running of gas electricity unit starting sufficient water vapour and electric refrigeration plant must be arranged also.Still there is not the practical application example at present.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology deficiency, a kind of air water two-phase flow coal mine light concentration mash gas safety conveying method being provided; The present invention provide simultaneously be provided with simple relatively, easy to operate, energy consumption is low, supply gas pressure is stable, gas more than needed diffuses automatically, can ensure that the extraction pump normally moves, safe and reliable, coal mine light concentration mash gas safety transporting system that dehydration effect is convenient to utilize well.
Technical solution problem of the present invention adopts following technological scheme.
The characteristics of coal mine light concentration mash gas safety conveying method of the present invention are in the malleation gas conveyance conduit of ground, current are around the inwall continuous-flow of conveyance conduit, form annular water flow, low-concentration methane gas is flowing in the formed annular water seal of described annular water flow, along on the throughput direction of described methane gas every one section with column water body airflow partition, form the end face water seal of air-flow, low-concentration methane gas forms intermittent plunger air-flow in described annular water flow and end face water seal.
The structural feature of coal mine light concentration mash gas safety transporting system of the present invention is:
Coal mine gas extraction power equipment adopts Nash hytor, and copper mesh formula flame trap that the damp outlet is provided with by connecting and leading portion backfire controller insert the inlet of Nash hytor;
Carry on the main from the malleation of the gas utilization equipment that exports to of Nash hytor, set gradually an input section moisture trap, the explosion-proof backfire controller of input section, an input section voltage stabilizing bleeding device, gas emptying pipe, control valve, plug flow device and circulating device in the conveying The initial segment of gas pumping pumping plant side;
In low concentration gas air water two-phase flow safe transport pipeline The initial segment leading portion transparent observing pipe is set, the terminal point section is provided with back segment transparent observing pipe;
Set gradually explosion prevention back-fire relief type separator for water and vapor, output section voltage stabilizing bleeding device, measuring apparatus and the back-fire relief release slag extractor that discharges water in the conveying terminal point section of gas utilization equipment side, the discharge water output terminal of slag extractor of back-fire relief release inserts gas utilization equipment, and the backwater of output section moisture trap enters Nash hytor cooling water cycle water pond through return pipe.
Compared with the prior art, the beneficial effect of the inventive method is embodied in:
1, for carry out the mode that the gas malleation is carried from delivery side of pump to the gas utilization device, the gas in the pipeline leaks into outside the pipe easily, is subjected to the influence of ground environment bigger, and the gas after the leakage is met naked light and then might be propagated in the pipeline, and forms catastrophe; Simultaneously, gas utilization equipment also may produce tempering, and the gas that involves in the pipeline produces catastrophe, the normal operation of entail dangers to extraction pump when serious.The mode that the present invention adopts air water two-phase flow malleation to carry can effectively address this problem.The situation of water seal is the mode of movement of essential safe type.Carry circulation and post stream device by means of low concentration gas, low-concentration methane gas forms intermittent plunger air-flow in annular water seal and end face water seal, make low concentration gas lose deflagration behavior, relevant parameters such as the pressure by methane gas and current are set, flow, can effectively guarantee the water seal effect of full pipeline, very easily form and keep.And because G﹠W is two phases, and it is also comparatively convenient to dewater, effect is easy to guarantee.
2, malleation transporting system of the present invention makes it form circulation and plug flow by adjusting supply gas pressure, flow and pressure of supply water, the flow of low concentration gas air water two-phase flow transporting system.Whole transporting system need not additionaling power equipment, transmitting power derives from the Nash hytor outlet pressure, water supply derives from the supporting raw water service pump of Nash hytor, the low concentration gas that air water two-phase flow system carries enter utilize facility before, carry out air-water separation through explosion prevention back-fire relief type separator for water and vapor, the gas source of the gas after the dehydration can directly utilize, the water after the dehydration, flow back to the water pump feed cistern and recycle, that system is provided with is relatively simple, easy operating, energy consumption are low, safe and reliable.
3, system of the present invention discharges gas more than needed automatically by the voltage stabilizing bleeding device, reaches the coupling voluntarily of gas pumping amount and utilization, has realized the effective overpressure protection to pump; Release effect by flame trap, explosion-proof fireproof tempering device and voltage stabilizing bleeding device has realized the effective catastrophe of pump is protected.
4, low concentration gas may be in explosion ratio scope interval in conveying, forbid to build a jar buffer storage, but owing to have mismatch between gas pumping pump extraction amount and the gas utilization facility utilization, unnecessary gas can raise the safe operation that jeopardizes the extraction pump by build-up of pressure.The present invention adopts the voltage stabilizing bleeding device, can unnecessary gas be diffused in actual applications, can guarantee the supply gas pressure that needs of gas utilization facility again, has solved this practical problem safely and effectively.
5, dehydration effect directly influences gas utilization efficient, and refrigeration and whirlwind dehydration can be dealt with problems in theory, but system is too complicated.Explosion prevention back-fire relief type separator for water and vapor of the present invention has adopted the principle of two direction streams of air water to dewater, and has not only improved dehydration effect, helps improving gas utilization efficient, and has the back-fire relief function concurrently, and is more reliable on the safety.
6, the present invention can by in getting working face extraction pipe outlet port, in extraction pipeline outlet port, exploiting field, go into the down-hole mouth at main and be provided with the back-fire relief release slag extractor that discharges water is set respectively.The underground gas extraction pipe network is divided into block, makes it separate,, catastrophe is controlled at minimum zone in case the catastrophe generation can realize multistage back-fire relief.
Description of drawings
Fig. 1 constitutes schematic representation for system of the present invention.
Number in the figure: the explosion-proof backfire controller of 1 input section, 2 input section voltage stabilizing bleeding devices, 3 gas emptying pipe, 4 control valves, 5 plug flow devices, 6 circulating devices, 7 leading portion transparent observing pipes, 8 back segment transparent observing pipes, 9 explosion prevention back-fire relief type separator for water and vapor, 10 output section voltage stabilizing bleeding devices, 11 measuring apparatuss, the 12 back-fire relief releases slag extractor that discharges water, 13 cooling water cycle water ponds, 14 Nash hytors, 15 copper mesh formula flame traps, the explosion-proof backfire controller of 16 leading portions, 17 input section moisture traps, the 18 down-hole back-fire relief releases slag extractor that discharges water.
Fig. 2 is circulating device structural representation in the system of the present invention.
Fig. 3 is plug flow apparatus structure schematic representation in the system of the present invention.
Fig. 4 (a) carries voltage stabilizing bleeding device structural representation for gas malleation in the system of the present invention.
Fig. 4 (b) is Fig. 4 (a) shown device principle of stabilized voltage schematic representation
Fig. 5 is explosion prevention back-fire relief type separator for water and vapor structural representation in the system of the present invention.
Fig. 6 is the slag extractor structural representation that discharges water of back-fire relief release in the system of the present invention.
Embodiment
Referring to Fig. 1, coal mine gas extraction power equipment adopts Nash hytor 14, and copper mesh formula flame trap 15 that the damp outlet is provided with by connecting and leading portion backfire controller 16 insert the inlet of Nash hytor 14; Carry on the main from the malleation of the gas utilization equipment that exports to of Nash hytor 14, set gradually an input section moisture trap 17, the explosion-proof backfire controller 1 of input section, an input section voltage stabilizing bleeding device 2, gas emptying pipe 3, control valve 4, plug flow device 5 and circulating device 6 in the conveying The initial segment of gas pumping pumping plant side; In low concentration gas air water two-phase flow safe transport pipeline, be positioned at The initial segment leading portion transparent observing pipe 7 is set, the terminal point section is provided with back segment transparent observing pipe 8; Set gradually explosion prevention back-fire relief type separator for water and vapor 9, output section voltage stabilizing bleeding device 10, measuring apparatus 11 and the back-fire relief release slag extractor 12 that discharges water in the conveying terminal point section of gas utilization equipment side, the discharge water output terminal of slag extractor 12 of back-fire relief release inserts gas utilization equipment, and the backwater of output section moisture trap 9 enters Nash hytor cooling water cycle water pond 13 through return pipe.
Referring to Fig. 2, the structural type of circulating device is that the gas conveyance conduit of segmentation setting is that inner ring sleeve a4, back segment pipe are that outer ring set a3 forms the mutual intussusception that has the annular space each other with the leading portion pipe in the system, in its intussusception position, be positioned at the ring sparger a7 that the periphery setting of pipeline is communicated with the annular space, water filling hole a1 is set on the ring sparger a7.
In the gas course of conveying, current a2 Automatic water-filling mouth a1 injects, the annular space that forms via outer ring set a3 and inner ring sleeve a4 in ring sparger a7 forms annular water flow a5 and enters the gas conveyance conduit, and on the inwall of gas conveyance conduit, forming moisture film, the gas air-flow a6 of low density flows in moisture film.Spread in the pipeline with the burning things which may cause a fire disaster in the circulation moisture film blocking-up conveyance conduit external environment condition, avoid taking place in the pipeline catastrophe; When the gas conveyance conduit has leakage, at first to leak, this situation is convenient to maintenance and inspection, thereby guarantees the safe transport of low concentration gas.
Referring to Fig. 3, the structural type of plug flow device is the water storage cavity b9 that is provided with suction tude b3 in the system, the top of water storage cavity b9 communicates with water source tube by water filling hole b1, the bottom of water storage cavity b9 is provided with beam pipe b8, on the mouth of pipe of post stream pipe b8, the leading type diaphragm valve is set, the leading type diaphragm valve is to constitute first guide cavity b6 by rubber membrane b5 and sealing cover b4, rubber membrane b5 is positioned at the mouth of pipe top of post stream pipe b8, sealing cover b4 is provided with the water intake b10 that communicates with water storage cavity b9, communicate with syphon tube b2 between sealing cover b4 and post stream pipe b8, the caliber of syphon tube b2 is greater than the diameter of water intake b10.
Current inject water storage cavity b9 through water filling hole b1, and the water intake b10 that upward reserves by sealing cover b4 enters first guide cavity b6, when the water level among the water storage cavity b9 surpasses when being in the mouth of pipe height of syphon tube b2 among the first guide cavity b6, water in the guide cavity b6 of elder generation discharges in beam pipe b8 through syphon tube b2, because the diameter of the water intake b10 that reserves on sealing cover b4 is less than the caliber of syphon tube b2, guide cavity b6 internal cause siphon formerly forms negative pressure, so rubber membrane b5 upwards lifts, the mouth of pipe of beam pipe b8 is beaten mouth, and the water among the water storage cavity b9 forms the post that flows among the gas delivery pipe b11 thereupon and flows b7 in post stream pipe b8.
In the gas course of conveying, this device produces intermittent loose water body plug flow, the low concentration gas that flows in the gas conveyance conduit is divided into segment, flame enters the low concentration gas delivery line and produces catastrophe when avoiding the tempering of gas utilization facility, and then realizes the conveying of coal mine light concentration mash gas air water two-phase flow essential safe type.
Referring to Fig. 4 (a) and Fig. 4 (b), the structural type of voltage stabilizing bleeding device is to be provided with between gas pumping pipe c14 and gas emptying pipe c15 by seal tank outer tube wall c2 in the system, inner tubal wall c19, dividing plate pipe c12, the upright slot type water seal voltage stabilizing bleeding device of the common formation of diffusion jar c3 and exhaust stack c1, in slot type water seal voltage stabilizing bleeding device, the top of the water seal face of being positioned at is provided with the water injection valve c11 that can often open, upper limit position place at water seal face is provided with overflow c8, U type pipe c6 is set in the bottom of the overflow pipe c7 that is communicated with overflow c8, U type pipe c6 is immersed in below the liquid level of pond c5 up with its mouth of pipe, above slot type water seal stable-pressure device, a jar c3 accepts with diffusion, and the top of diffusing tube c3 is inserted emptying pipe c15 by exhaust stack c1 in straight-through mode.
In concrete the enforcement, gas pumping pipe c14, emptying pipe c15, exhaust-valve c16, delivery valve c17 and delivery pipe c18 are set routinely.Seal tank outer tube wall c2 is that the side opening by base disk c10 and gas pumping pipe c14 assembles, on outer tube wall c2, fluviograph c4 should be set, and drain valve c13 is set, the position that pressure-limit valve c9 opens, overflow promptly is in pressure-limit valve c9 in the bottom of outer tube wall c2.
In the working procedure, water injection valve c11 is in normally open, and current enter in the seal tank, flows out automatically when water level c20 is higher than overflow c8, and enters among the c5 of pond through overflow pipe c7 and U type pipe c6, forms continuous periodical feeding.By setting the spilling water height of overflow c8, can adjust the water level c20 of seal tank.
In the slot type water seal principle of stabilized voltage schematic representation shown in Fig. 4 (b), the water level c20 position in the seal tank is the position at place under the normal working.
The supply gas pressure size of gas pumping pipe c14 is to be decided by the resistance of gas utilization delivery pipe c18, increases supply gas pressure, can improve the line transportation distance, but maximum supply gas pressure must be less than 0.2kg, and promptly the maximum outlet pressure of Nash hytor is not more than 0.2kg.
Adopt the slot type water seal to carry out voltage stabilizing, periodical feeding.When supply gas pressure exceeds the steady pressure of seal tank setting, gas passes through from seal tank and discharges from emptying pipe automatically, the water that the gas of discharging is taken away from tank can be by the automatic supply of periodical feeding, and periodical feeding can also prevent from winter to freeze and cause the inefficacy of voltage stabilizing bleeding device.
Referring to Fig. 5, the structural type of explosion prevention back-fire relief type separator for water and vapor is the air water two-phase bolus flow supplying tube d3 that is inclined to set in the system, air water two-phase bolus flow supplying tube d3 enters and is that branch is forked to be divided into two-way output before the explosion prevention back-fire relief type separator for water and vapor knock out drum, one the tunnel is the water stream tube d4 that is connected on its end mouth, and another road is the one-level dehydration gas flow tube d2 that is connected its waist; Be explosion prevention back-fire relief type separator for water and vapor knock out drum back-fire relief tube d1 uprightly is set, one-level dehydration gas flow tube d2 inserts the air flow inlet that is positioned at knock out drum back-fire relief tube d1 upper portion side wall, on the madial wall of air flow inlet, be provided with entering the secondary dehydration plate washer d6 of one-level dehydration air-flow formation block among the knock out drum back-fire relief tube d1, after secondary dehydration baffle plate d6, forming secondary dehydration air-flow d7; Water stream tube d4 inserts in knock out drum back-fire relief tube d1 bottom, and the oral area of dehydration air-flow output tube d5 is arranged on knock out drum back-fire relief tube d1 top, and return pipe d8 is positioned at knock out drum back-fire relief tube d1 sidewall, and the mouth of pipe of return pipe d8 is consistent with the entrance height of one-level dehydration gas flow tube d2.
In concrete the enforcement, in explosion prevention back-fire relief type separator for water and vapor knock out drum back-fire relief tube d1 top or any side, air-flow voltage stabilizing bleeding device valve is set, the port of dehydration air-flow output tube d5 is the voltage stabilizing delivery outlet of air-flow voltage stabilizing bleeding device valve.
Utilize gravity to dewater, and adopt the water-sealed type back-fire relief, the gas relative moisture after the dehydration does not contain water of condensation in 95% ± 3 scope, satisfy the air feed requirement of gas utilization facility fully.
Referring to Fig. 6, the discharge water structural type of slag extractor of back-fire relief release is made up of two-part up and down in the system, and top is flame trap, and the bottom is a tailrace.Wherein, the top flame trap is provided with two air-flow paths up and down.
The middle part of overdraught passage is can be along the two-way mobile dull and stereotyped spool e8 of airflow direction, the both sides of dull and stereotyped spool e8 are respectively established closure plate e9 one, closure plate e9 is provided with circular channel e10, dull and stereotyped spool e8 has two states, the one, dull and stereotyped spool e8 is between the two side stopboard e9 and with two side stopboard e9 and is separated, and the periphery of dull and stereotyped spool e8 and closure plate e9 middle part circular channel form the upper air passage; Another is that dull and stereotyped spool e8 reclines because of impacted with side stopboard e9 formation by air pressure, and the upper air passage is then closed;
The downstream passage is the water seal passage, and is undertaken on the below of overdraught passage, in the downstream passage, be respectively arranged with water injection valve e2, slag-off valve e4 and with the water cavity e3 of overdraught channel connection.
The function of back-fire relief is to utilize the principle of methane gas blast impulse velocity of wave propagation than flame propagation speed.The overdraught passage is a two-way valve, when stream pressure is closed during greater than setting value automatically; The downstream passage adopts water seal, and normal state mash gas extraction gas has been closed the overdraught channel valve by the overdraught passage as producing impact air-flow in the pipeline, and the flame flow of Dao Laiing can only be realized back-fire relief by the water seal passage subsequently.
Bottom tailrace e5 is positioned at the bottom of lower stream of airflow passage, and when the water among the inflow water cavity e3 in the pipeline surpassed water line e12, water flowed into tailrace e5 from water inlet pipe e13, and after the certain water yield of tailrace e5 inner accumulated, dewatering outlet e15 opens automatically with unnecessary water discharging.
In concrete the enforcement, the realization of pressure relief is to be provided with pressure relief opening e6 in the upper air passage, with pressure release film e7 pressure relief opening e6 is formed shutoff, after ducted stream pressure surpasses certain value (be set at usually＞1kg), unload pressing mold e7 by the air pressure bursting, air-flow flows out from the e6 of relief port and reaches the release purpose.Dull and stereotyped spool e8 is provided with 14 suspentions of top suspension, and deslagging is manually to open slag-off valve e4 and to open water injection valve e2 bath deslagging under the state of stopping the supple of gas or steam.Before coming into operation, at first open water injection valve e2 water filling in device, till the dewatering outlet of tailrace e5 e15 begins to discharge water automatically.Install during normal use, the water among the water cavity e3 can be replenished by the ducted water of extraction, and unnecessary water can discharge automatically by the dewatering outlet e15 of tailrace e5.
In concrete the enforcement, the back-fire relief release slag remover that discharges water need be separately positioned in down-hole mining working surface extraction pipe outlet port, extraction pipeline outlet port, exploiting field, and main is gone into down-hole mouth etc.The underground gas extraction pipe network is divided into block.
Claims (8)
1. coal mine light concentration mash gas safety conveying method, it is characterized in that in the malleation gas conveyance conduit of ground, current are around the inwall continuous-flow of conveyance conduit, form annular water flow, low-concentration methane gas is flowing in the formed annular water seal of described annular water flow, along on the throughput direction of described methane gas every one section with column water body airflow partition, form the end face water seal of air-flow, low-concentration methane gas forms intermittent plunger air-flow in described annular water flow and end face water seal.
2. coal mine light concentration mash gas safety transporting system is characterized in that:
Coal mine gas extraction power equipment adopts Nash hytor (14), and copper mesh formula flame trap (15) that the damp outlet is provided with by connecting and leading portion backfire controller (16) insert the inlet of Nash hytor (14);
Carry on the main from the malleation of the gas utilization equipment that exports to of Nash hytor (14), set gradually an input section moisture trap (17), an input section explosion-proof backfire controller (1), an input section voltage stabilizing bleeding device (2), gas emptying pipe (3), control valve (4), plug flow device (5) and circulating device (6) in the conveying The initial segment of gas pumping pumping plant side;
In low concentration gas air water two-phase flow safe transport pipeline The initial segment leading portion transparent observing pipe (7) is set, the terminal point section is provided with back segment transparent observing pipe (8);
Set gradually explosion prevention back-fire relief type separator for water and vapor (9), output section voltage stabilizing bleeding device (10), measuring apparatus (11) and the back-fire relief release slag extractor (12) that discharges water in the conveying terminal point section of gas utilization equipment side, the discharge water output terminal of slag extractor (12) of back-fire relief release inserts gas utilization equipment, and the backwater of explosion prevention back-fire relief type separator for water and vapor (9) enters Nash hytor cooling water cycle water pond (13) through return pipe.
3. coal mine light concentration mash gas safety transporting system according to claim 2, the structural type that it is characterized in that described circulating device (6) is that the gas conveyance conduit of segmentation setting is that inner ring sleeve (a4), back segment pipe are that outer ring set (a3) forms the mutual intussusception that has the annular space each other with the leading portion pipe, in its intussusception position, be positioned at the ring sparger (a7) that the periphery setting of pipeline is communicated with described annular space, water filling hole (a1) is set on the ring sparger (a7).
4. coal mine light concentration mash gas safety transporting system according to claim 2, the structural type that it is characterized in that described plug flow device (5) is the water storage cavity (b9) that is provided with suction tude (b3), the top of water storage cavity (b9) communicates with water source tube by water filling hole (b1), the bottom of water storage cavity (b9) is provided with post stream pipe (b8), on the mouth of pipe of described post stream pipe (b8), the leading type diaphragm valve is set, described leading type diaphragm valve is to constitute first guide cavity (b6) by rubber membrane (b5) and sealing cover (b4), rubber membrane (b5) is positioned at the mouth of pipe top of post stream pipe (b8), sealing cover (b4) is provided with the water intake (b10) that communicates with water storage cavity (b9), between sealing cover (b4) and post stream pipe (b8), (b2) communicates with syphon tube, and the caliber of syphon tube (b2) is greater than the diameter of water intake (b10).
5. coal mine light concentration mash gas safety transporting system according to claim 2, it is characterized in that described input section voltage stabilizing bleeding device is between gas pumping pipe (c14) and gas emptying pipe (c15), setting is by seal tank outer tube wall (c2), inner tubal wall (c19), dividing plate pipe (c12), the common upright slot type water seal voltage stabilizing bleeding device that constitutes of diffusion jar (c3) and exhaust stack (c1), described inner tubal wall (c19) leads directly to extraction pipe (c14), the top of the water seal face of being positioned at is provided with the water injection valve (c11) that can often open, at the upper limit position place of water seal face overflow (c8) is set, bottom at the overflow pipe (c7) that is communicated with overflow (c8) is provided with U type pipe (c6), U type pipe (c6) is immersed in below the liquid level of pond (c5) up with its mouth of pipe, above described seal tank, jar (c3) accepts with diffusion, and the top of diffusion jar (c3) is inserted emptying pipe (c15) by exhaust stack (c1) in straight-through mode.
6. coal mine light concentration mash gas safety transporting system according to claim 2, the structural type that it is characterized in that described explosion prevention back-fire relief type separator for water and vapor (9) is the air water two-phase bolus flow supplying tube (d3) that is inclined to set, described air water two-phase bolus flow supplying tube (d3) enters and is that branch is forked to be divided into two-way output before the explosion prevention back-fire relief type separator for water and vapor knock out drum, one the tunnel is the water stream tube (d4) that is connected on its end mouth, and another road is the one-level dehydration gas flow tube (d2) that is connected its waist; Be explosion prevention back-fire relief type separator for water and vapor knock out drum back-fire relief tube (d1) uprightly is set, described one-level dehydration gas flow tube (d2) inserts the air flow inlet that is positioned at knock out drum back-fire relief tube (d1) upper portion side wall, on the madial wall of air flow inlet, the secondary dehydration baffle plate (d6) that the one-level dehydration air-flow that enters knock out drum back-fire relief tube (d1) is formed block is set; Described water stream tube (d4) inserts the bottom at knock out drum back-fire relief tube (d1), the oral area of dehydration air-flow output tube (d5) is arranged on knock out drum back-fire relief tube (d1) top, return pipe (d8) is positioned at the sidewall of back-fire relief tube (d1), and the mouth of pipe of return pipe (d8) is consistent with the entrance height of described one-level dehydration gas flow tube (d2).
7. coal mine light concentration mash gas safety transporting system according to claim 2 is characterized in that the discharge water structural feature of slag extractor of described back-fire relief release is to be made of top flame trap and bottom tailrace;
Described top flame trap has two air-flow paths up and down, wherein, the middle part of overdraught passage is can be along the two-way mobile dull and stereotyped spool (e8) of airflow direction, one closure plate (e9) respectively established in the both sides of dull and stereotyped spool (e8), closure plate (e9) is provided with circular channel (e10), described dull and stereotyped spool (e8) has two states, the one, dull and stereotyped spool (e8) is between two side stopboards (e9) and with two side stopboards (e9) and is separated, and the circular channel (e10) in the periphery of dull and stereotyped spool (e8) and the closure plate (e9) forms the overdraught passage; Another is that dull and stereotyped spool (e8) reclines the overdraught pathway closure because of impacted with a side stopboard (e9) formation by air pressure; The downstream passage is the water seal passage, and is undertaken on the below of overdraught passage, in described downstream passage, be respectively arranged with water injection valve (e2), slag-off valve (e4) and with the water cavity (e3) of overdraught channel connection;
Described bottom tailrace (e5) is the bottom that is positioned at the downstream passage.
8. coal mine light concentration mash gas safety transporting system according to claim 7, its feature are provided with pressure relief opening (e6) in described overdraught passage; Described dull and stereotyped spool (e8) is to be provided with its top suspension (e14) suspention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101934121A CN101158286B (en) | 2007-11-15 | 2007-11-15 | Coal mine light concentration mash gas safety conveying method and conveying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102486426A (en) * | 2010-12-06 | 2012-06-06 | 淮南矿业(集团)有限责任公司 | Gas pressure measurement device |
| CN102278133B (en) * | 2011-06-29 | 2013-06-05 | 淄博淄柴新能源有限公司 | Individual overflow water seal fire relief and explosion release device |
| CN102996157A (en) * | 2011-09-13 | 2013-03-27 | 淮南矿业(集团)有限责任公司 | Water-level change warning device and coal mine gas extraction system |
| CN102828769B (en) * | 2012-09-20 | 2014-08-20 | 中煤科工集团重庆研究院 | Complete oil receiving, pumping and conveying device for pumping and extracting mine gas |
| CN103016046A (en) * | 2012-12-11 | 2013-04-03 | 山东绿环动力设备有限公司 | Mash gas electricity generating system |
| CN103670493A (en) * | 2013-12-03 | 2014-03-26 | 神华神东保德煤矿 | Ground gas emptying system |
| CN105466736B (en) * | 2016-01-07 | 2018-04-24 | 淄博祥龙测控技术有限公司 | Positive pressure sampling system and the positive pressure sampling pumping plant for sampling system |
| CN106828117A (en) * | 2017-03-31 | 2017-06-13 | 衡阳师范学院 | Device for carrying out energy regenerating in automobile brake |
| CN108643959A (en) * | 2018-03-01 | 2018-10-12 | 杨帅 | Underground coal mine explosion-proof method |
| CN108316963A (en) * | 2018-03-01 | 2018-07-24 | 刘晓靖 | Underground coal mine explosion protection system |
| CN108386231B (en) * | 2018-04-25 | 2024-03-26 | 淮南矿业(集团)有限责任公司 | Abandoned mine gas collecting and utilizing device and using method thereof |
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Application publication date: 20080409 Assignee: ViewSonic energy (Fukang) Coal Industry Co Ltd Assignor: National Engineering Research Center for Gas Controlling of Pingan Mine Contract record no.: 2013990000576 Denomination of invention: Coal mine light concentration mash gas safety conveying method and conveying system Granted publication date: 20100707 License type: Common License Record date: 20130911 |
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