72 results about "Firedamp" patented technology

The invention relates to a coal-gas outburst simulation platform for processing coal-gas outburst simulation researches under different coal bed inclinations, different ground stresses and different gas pressures, and researching the transmission rule and attenuation character of acoustic emission signal in the outburst process. The invention uses a plurality of hydraulic jacks to axially jack coal sample, uses an aeration port to charge gas into the coal sample, and can simulate the protruded stress concentrated zone caused by underground coal face, to simulate the outburst condition of coal and gas. The protruded port of the device via a quick release device can realize mechanical automatic control, to quickly open the protruded port to instantly release pressure at the protruded end and eliminate the effect on the protruding energy by manually opening the protruded port, to simulate on-site protrusion actually.

The invention relates to a highly gassy coal seam group mining gob-side entry retaining Y-shaped ventilation and decompression gas extraction method. The invention is characterized in that: free desorption gas which comes from an adjacent decompression layer and is gathered into a roof plate decompression crack ring and a bottom plate decompression crack ring through crack channels which are formed by mining affection on roof plate coal seam and strata and bottom plate coal seam and strata is extracted in a gob-side entry through an upward extraction gas drill hole which is arranged inside the roof plate decompression crack ring and a downward extraction gas drill hole which is arranged inside the bottom plate decompression crack ring in a roof plate decompression area and a bottom plate decompression area of a gob-side entry retaining gob of a coal face of a primarily extracted coal seam of a highly gassy coal seam group. The highly gassy coal seam group mining gob-side entry retaining Y-shaped ventilation and decompression gas extraction method solves the problem of low extraction rate of the highly gassy low permeability coal seam group, simultaneously solves the ultralimit problem of airflow gas of spatial angles and return airways on the coal face of the primarily extracted coal seam of the highly gassy coal seam group, and realizes extraction utilization of high concentration gas and highly efficient and safe extraction of the highly gassy coal seam group without coal pillars.

The invention discloses a grain-saving type feed replacing the grain to deduce the greenhouse gasses, which is mainly composed of a lees and / or Jerusalem artichoke, drugs reducing the emission of animal waste gas, straws, grazing, tree or normal feeds. The invention, besides suits the normal feeding, is also applicable for multi-functional grain-saving type ''carbon culture'' and ''lees or Jerusalem artichoke;; feed, fuel and ethanol industrial integrating livestock breeding, forest industry and firedamp with compact shaped fuel as ''alcohol to gasline'', ''ordure to electricity'', ''fart to cylinder gas'', ''branch to coal'', ''forest to meats'' co-produced meat, eggs and milk, ethanol and canned firedamp. Farmers, besides using feeding with castoff and planting trees and grasses to resolve the meat demanding in China, also can become the industrial worker for planting ''energy'' by conducting the multi-functional production for reducing the greenhouse gases, which is beneficial for the reusing the castoff, promoting the construction of the energy forest and fast-growing and high-yield plantation with low cost, small investment, simpleness and practicability and conforms to the harmonious circulation between human and nature.

The invention relates to a mine gas long-distance optical fiber laser detector, which comprises a light source and a first coupler and a second coupler which are connected with the light source, wherein, the first coupler is connected in series with the second coupler through a second optical fiber and connected with a reference gas chamber through a fourth optical fiber; light which are emitted from the reference gas chamber is connected with a third photo detector through a fifth optical fiber; one path of the second coupler is connected with a gas sensor probe through a third optical fiber; the other path of the second coupler is connected with a first photo detector through a sixth optical fiber; light which returns back from the gas sensor probe passes through the third optical fiber and the second coupler and then is connected with a second photo detector through a seventh optical fiber; the first photo detector, the second photo detector and the third photo detector are electrically connected with a data acquisition card, and electrical signals are then transmitted to a computer. The mine gas long-distance optical fiber laser detector is mainly used for coal mine gas detection.

Systems and methods for fire and smoke containment and extinguishing are described. Systems may include a fire and smoke containment and extinguishing apparatus including an open recess with one or more walls. The open recess may substantially prevent passage of fire, smoke and fumes. The apparatus may also include one or more seals for closing the open recess, and a fire extinguishing system. Methods for fire and smoke containment and extinguishment may include providing a fire and smoke containment and extinguishing system; inserting an item into the recess of the apparatus; closing the recess; and deploying the fire extinguishing system.

The invention relates to a coal mining method for co-mining gas in a mine. A method for injecting nitrogen in a sealed manner is adopted to close an upper drift and a lower drift of a stope face to ensure that the concentration of gas in a closed space is over 20%, the concentration of oxygen is lower than 12%, so that the explosive hazard of the gas is eliminated, and high-concentration gas in a roadway is drained so as to be utilized. A safety pressure-relief roadway needs to be remained in the mine with dangers of coal and gas outburst, and is used for releasing high-pressure gas generated by coal and gas outburst, and improving disaster resistant capability of the mine. An air regulating system is arranged in the closed space for regulating air, and a worker operates in the closed space under the condition that the safety protection is well done. Due to adoption of the method, the problem of gas explosion is solved fundamentally, the utilization ratio of gas is improved, fire disasters of the coal mine are eliminated fundamentally, the oxidation corrosion of various metal equipments is reduced, and simultaneously the equipment does not have anti-explosion requirements. As workers breathe air carried per se, the occurrence of respiratory occupational diseases is avoided. Therefore, the coal mining method for co-mining gas has extremely large popularization value.

The invention relates to an on-line timing method of mash gas sensor of safety monitoring system for mining, which includes three modes: 1) doing on site alignment calibration of mash gas sensor, that is controlling the mash gas sensor and sending the alignment calibration status messages to the monitoring branch station and the monitoring server out of mine; the monitoring server out of mine displays the mash gas sensor is in alignment calibration condition; then doing on site ventilation alignment calibration and service interruption functional test of the corresponding mash gas sensor, at last ending the alignment calibration condition; setting a mash gas sensor in a alignment calibration condition by the monitoring branch station, then doing on site ventilation alignment calibration and service interruption functional test of the corresponding mash gas sensor, at last ending the alignment calibration condition; setting a mash gas sensor in a alignment calibration condition by the monitoring server out of mine, then doing on site ventilation alignment calibration and service interruption functional test of the corresponding mash gas sensor, at last ending the alignment calibration condition. The invention can shorten the blind zone in monitoring time, in order to improve downhole operation safety and reduce mis-alarming.

The invention relates to a secondary hole sealing device for gas drainage and drilling, consisting of a main air inlet pipe, a control valve, a relief valve and a feeding device, wherein, the main air inlet pipe is directly connected with the feeding device; the control valve and the relief valve are arranged on an inlet pipe of the feeding device in turn. High-pressure gas in a compressed air pipe is adopted as air sources; gas admission is controlled by the control valve; the pressure of inlet gas is reduced to proper pressure by the relief valve; secondary hole sealing materials are blown into a gas drainage drill hole with certain pressure through the feeding device; the drill hole is full of the hole sealing materials under the action of pressure and the hole sealing materials are permeated into cracks on the circumference of the drill hole, and then secondary hole sealing of the gas drainage drill hole is finished. The secondary hole sealing device has the advantages of simple operation, good hole sealing effect, light weight, convenient transportation, safety and reliability, and wide practicability.

The invention discloses a coal bed gas catalysis conversion deoxidation method, which comprises pumping raw material coal bed gas into a deoxidation reactor to do catalysis conversion deoxidation reaction after desulfurizing. The invention is characterized in that water vapour is added in coal bed gas after coal bed gas is desulfurized, and mole ratio of water which is added and firedamp in coal bed gas is led to be H2O/CH4=0.2-0.5. Partial firedamp is conversed to be CO and H2 through adding a little amount of water in coal bed gas, the method increases heat quantity of output gas and improves cold air efficiency of output gas, which is suitable for the fields which have wider heat value adaptation to gas and need to be pressured to higher pressure.

A method and apparatus for controlling and extinguishing subterranean coal fires. Suitable detection and measuring devices are initially used to determine the extent of the fire and develop a plan of extinguishment. Flow control devices are added to all the mine's access points in order to control gas flow into and/or out of the mine. In addition, new access points may be added. Gaseous carbon dioxide is pumped into the mine until a positive pressure is developed (with respect to atmospheric pressure. Pressurized and liquefied carbon dioxide is directed into the area of the combustion face. The liquid carbon dioxide blankets the combustion area with a gas which will not support combustion and absorbs a tremendous amount of heat from the burning coal.

The invention relates to a device and a method for processing waste firedamp liquid, belonging to the field of sewage treatment. The invention solves the problems of high cost of purifying the waste firedamp liquid and easy secondary pollution of the traditional processes for treating the waste firedamp liquid. A separation device is arranged under a firedamp fermentation cylinder, the side wall at the lower end of the firedamp fermentation cylinder is communicated with the separation device by a waste firedamp liquid outlet pipe, a liquid outlet on the side wall of a fermentation tank is communicated with one end of an outlet pipe by a sewage pump, and the other end of the outlet pipe is communicated with the upper end of the firedamp fermentation cylinder. The method comprises the following steps: after filtrated, residuals generated after firedamp fermentation is fermented and then completely flows back to be used for fermenting the firedamp, thereby finishing treatment of the waste firedamp liquid. The device for processing the waste firedamp liquid has the advantages of simple structure, low manufacturing cost, little ground occupation, high strength and convenient construction; the method for processing the waste firedamp liquid by the device is simple and convenient to operate and reduces the purification cost, and the generated firedamp is used as energy, which purifies the environment.

The invention discloses a fire prevention method for a coal gangue mountain. The fire prevention method comprises the steps of: determining a spontaneous combustion fire area in the coal gangue mountain; performing presplitting permeability improvement for the coal gangue mountain in the spontaneous combustion fire area; and performing injection cooling for the coal gangue mountain after the presplitting permeability improvement. The fire prevention method can effectively determine the spontaneous combustion fire area, then performs the permeability improvement and the cooling for the spontaneous combustion fire area of the coal gangue mountain by using a presplitting permeability improvement system, and finally injects a composite inhibition foam material in the spontaneous combustion fire area of the coal gangue mountain by using an injection system, so that a high-temperature point is reduced below a spontaneous combustion fire point of coal gangue, oxygen is isolated, the purpose of preventing coal gangue fire is radically achieved, and the governance effect on the coal gangue mountain is improved.

This invention relates to a biogas production wastewater treatment device and a cycle anaerobic reactor used in the device, which is used for environmental engineering. The device invented consists of a new self-cycle anaerobic reactor and a computer control system. The core self-cycle anaerobic reactor comprises two overlapping anaerobic reaction zones in series, wherein the upper parts of the two reaction zone are established gas-solid-liquid three phase separators respectively. The lower reaction zone is at an extreme high load, while the upper reaction zone is at low load. The three-phase separator sludge can be separated and returned to the main separator by the separator and biogas is collected. Internal reactor is capable of forming self-circle liquid, and can strengthen mass transfer process of organism and granular sludge and improve handling capability. The floor place of the three phase separator is small, high concentration of organic wastewater can be treated and biogas as biological energy can be produced. The device can achieve the scale biogas technology and automated production, and is an ideal scale wastewater treatment and gas production equipment.

The invention provides a liquefied natural gas leakage diffusion fire disaster integrated experimental platform; the platform comprises an experimental field and experimental field peripheral combustible gas alarm devices; the experimental field comprises a liquefied natural gas storage conveying system, a liquid collecting pool experimental system, a measurement control system and a security safeguard system, and the systems are in mutual cooperation; a liquefied natural gas storage tank delivers liquefied natural gas through an thermal insulation hose passing through a firewall, the thermal insulation hose is connected to different liquid pools or liquefied natural gas groove areas; experiments are carried out in the liquid pools and liquefied natural gas grooves, various sensors and infrared cameras are distributed in the experimental field, various experimental data are collected, the liquefied natural gas diffusion temperature field, the methane concentration distribution, the liquefied natural gas combustion temperature field and the thermal radiation field are measured, liquefied natural gas evaporation diffusion characteristics and combustion characteristics are studied in depth, and data supporting is provided for research of liquefied natural gas station yard security layout and liquefied natural gas diffusion fire disaster suppression technologies.

The present invention discloses a treating agent for microbe environmental-protective garbage, which comprises anaerobic bacteria and facultative aerobe. The weight ratio for the anaerobic bacteria and facultative aerobe is 1: .65-1.1; because the composite fostered active bacteria preparation can decompose ammonia gas, nitrogen gas and sulfureted hydrogen and so on, the active preparation can restrict the growth speed of spoilage organisms, block the growth of the myiasis and destroy the hatch of mosquito and fly. So the present invention has the great effects to kill the mosquito and fly, deodorization, and to cure corruption. The duration is much longer; the decreasing ratio for the mosquito and fly in the refuse dump reaches up to 95 percent and the decreasing ratio for the bad smelly reaches up to 80 percent. The present invention can decrease the pollution in the refuse dump, decrease the output of the firedamp and decrease the storage volume for the garbage. Besides, the product has not any side effect and special smelly. The present invention is not dangerous to the health, without producing the garbage and bringing the second pollution. After being used with the present invention, the neighboring environment around the refuse dump can be enhanced greatly.

The invention relates to a ventilation and smoke discharge device for an underground solid garage, which is characterized in that an annular exhaust duct is arranged around each underground parking layer; the annular exhaust duct is provided with parking exhaust outlets corresponding to underground parking stalls; the annular exhaust ducts of all underground parking layers are communicated with one another through underground garage vertical exhaust ducts, and communicated with ground garage exhaust ducts of the ground garages; the top parts of the ground garages are provided with top exhaust ducts connected with the ground garage exhaust ducts; and top exhaust fans are arranged on the top exhaust ducts. In case of a usual working condition, the problem that air quality in the underground solid garage cannot meet the sanitary requirement can be solved by pumping action of exhaust outlets; and operation efficiency of electric equipment in a garage can be improved by ventilation and heat extraction. In case of an accident condition, the ventilation and smoke discharge device can be used for smoke discharge in fire or after fire, smoke can be quickly removed, loss is reduced, and social and economic benefits are obvious. The ventilation and smoke discharge device dislcosed by the invention is convenient to construct, short in period and applicable to large-scale popularization.

The invention discloses a petrol coke delivery system which consists of a sealed petrol coke storage pool, a petrol coke pre-crushing device and material acquiring equipment and is characterized in that the petrol coke pre-crushing device is communicated with the sealed petrol coke storage pool; the material acquiring equipment is partially arranged in the sealed petrol coke storage pool and partially arranged outside the sealed petrol coke storage pool, so that the defects of serious pollution to neighboring environment, damage to health of workers, fire hazards and other unexpected safety accidents caused by coke powder during material grabbing, material discharging as well as grinding and crushing processes in the prior art are overcome.

The invention discloses a hydraulic pressure floating hood type methane tank. A hood body comprises a hood cover, a hood wall and an air tube and is coated on the inner bottom of a container; a distance interlayer is arranged between the hood wall and the wall of the container, the hood body is provided with a device for leading a material liquid into the hood, a device for controlling the height of a plane in hood covers of air storage chambers and a liquid level to be larger than zero, a positioning device for enabling the hood cover to freely float up and down and a device for discharging residue; the height of a feeding port is higher than a zero-pressure liquid surface, and the height of the wall of the hood is at least equal to a value which is obtained via algorithm as follows: a vertical upward cross stress area impulses the maximum output methane pressure in the gas storage chambers and divides the product of an average area of liquid surface cross hood wall and liquid density. According to a buoyancy principle and a simple structure, technical problems including high manufacturing cost of methane tanks, troubles of automatic residue discharging and automatic pressure stabilizing, less gas storage capacity and the like in the prior art are solved. Therefore, people can process a large amount of straw, household garbage and waste with low cost, and meanwhile, reproducible energy firedamp can be obtained.

The invention relates to a multifunctional recycling system for living garbage which comprises a cracking device, a firedamp device, a screening equipment and a burning device; the discharge opening of the cracking device is connected with the feeding opening of the firedamp device through a transmission device; the sediment discharge opening of the firedamp device is connected with the feeding opening of the screening equipment through the transmission device; the discharge opening of the matters on the screen of the screening device is connected with the feeding opening of the burning device through the transmission device; the generated materials of big block can be directly recycled; the magnetic materials which are mainly of iron can be directly used as metallurgical materials; the generated firedamp can be used as fuel gas; the generated mud can be used as the materials for preparing fertilizers, soil modifying agents and building materials ; the generated heavy materials can be used as the building materials or as filling materials. The system effectively utilizes various materials and energies in living garbage and is beneficial to save the treatment cost, reduce the environment pollution and is able to obtain useful materials and energies.

The invention relates to an urban garbage sorting recycling treatment device which comprises a cracking device used for carrying out primary cracking on the garbage after being primarily sorted, a gravity sorting device used for sorting the materials after primary cracking into heavy materials and light materials, a heavy material cracking device used for cracking the heavy materials, a heavy material magnetic separation device used for carrying out magnetic separation on the heavy materials after being cracked and a light material cracking device used for cracking the light materials. The discharge opening of the cracking device is connected with the feed opening of the gravity sorting device; the heavy material discharge opening of the gravity sorting device is connected with the heavy material cracking device; the light material discharge opening of the sorting device is connected with the light material cracking device; the back surface of the heavy material cracking device is provided with the magnetic separation device; the discharge opening of the light material cracking device is connected with a firedamp device. The device takes most urban garbage as the materials that can be recycled and carries out the sorting and treatment on the garbage, which is beneficial to leading most urban garbage to obtain reclamation utilization.

The method is in use for assistant burning of combustion equipment by using combustible gas in ultralow concentration (exhaust gases from coal mine with firedamp less than 1%, marsh gas of containing combustible gas in ultralow concentration, and combustible gas unable to be ignited by small fire generated from procedures of chemical engineering metallurgy). Through pipe, the said combustible gas transported to air inlet of combustion equipment is as combustion-supporting air and assistant fuel of main fuel to enter into firebox of combustion equipment to carry out burning. Features are: simple technique and equipment, reliable, reasonable design, taking full advantage of using energy, and environmental protection.