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528 results about "Gas explosion" patented technology

A gas explosion is an explosion resulting from mixing a gas, typically from a gas leak, with air in the presence of an ignition source. In household accidents, the principal explosive gases are those used for heating or cooking purposes such as natural gas, methane, propane, butane.In industrial explosions many other gases, like hydrogen, as well as evaporated (gaseous) gasoline (American ...

Carbon dioxide fracturing device

A carbon dioxide fracturing device comprises an energy relief head, a constant-pressure energy relief piece, a main pipe and a filling head, wherein the energy relief head and the filling head are respectively screwed with the two ends of the main pipe; a filling channel leading to a filling cavity of the main pipe and a thimble capable of opening and closing the filling channel are arranged on the filling head; an energy relief channel is arranged on the energy relief head; one end of the energy relief channel leads to the filling cavity of the main pipe, and the other end of the energy relief channel leads to the outside of the carbon dioxide fracturing device; the constant-pressure energy relief piece is arranged between the energy relief channel of the energy relief head and the filling cavity of the main pipe in a sealed manner; a heating device is arranged in the filling cavity of the main pipe; and the constant-pressure energy relief piece fractures when the heating device heats up and gasify liquid carbon dioxide in the filling cavity of the main pipe and the carbon dioxide gas expands to a certain pressure. The carbon dioxide fracturing device can replace detonators and explosives, which are frequently used in mine mining, avoids gas explosion caused by open fire to realize safety production of mines, can also enable coal to pre-split in the gas exhausting and mining process, effectively increases the air permeability of coal beds and improves the gas exhausting and mining efficiency of coal beds.
Owner:河北亿科金属制品有限公司

Carbon dioxide mining device

The invention discloses a carbon dioxide mining device. The carbon dioxide mining device comprises an energy release head, a fixed pressure energy release sheet, a main pipe and a filling head, wherein the energy release head and the filling head are respectively fastened at the two ends of the main pipe; a filling passage and an ejector pin are arranged on the filling head; the filling passage is led to a main pipe filling chamber, and the ejector pin is used for opening and closing the filling passage; an energy release passage is formed in the energy release head; one end of the energy release passage is led to the main pipe filling chamber; the other end of the energy release passage is led outside the carbon dioxide mining device; the fixed pressure energy release sheet is arranged between the energy release passage of the energy release head and the main pipe filling chamber in a sealed way; a heating device is arranged in the main pipe filling chamber; and the fixed pressure energy release sheet is fractured when liquid carbon dioxide filled into the main pipe filling chamber is heated, gasified and expanded to a certain pressure by the heating device. The carbon dioxide mining device disclosed by the invention can be used instead of common detonators and explosives in mine mining; gas explosion caused by fire explosion is avoided and safety production of the mine is also achieved; and a coal body can be also pre-cracked in the gas mining process, so that the air permeability of a coal layer is effectively improved, and the gas mining efficiency of the coal layer is increased.
Owner:CCTEG CHINA COAL RES INST

Production process of natural gas by using paddy hull

The invention relates to a production technique utilizing rice hulls to produce natural gas, which solves the problem of economically and effectively utilizing the rice hulls which are rich resources and biological materials. The technique of the invention essentially comprises the following steps: 1. Pulse gas explosion is carried out to the rice hulls and more than 90 percent of hemicelluloses in products of gas explosion are hydrolyzed while more than 85 percent of celluloses are isolated and puffed; 2. two-phase anaerobic fermentation is carried out to the products of gas explosion, thus respectively obtaining methane and acid liquor; and 3. desulfurization is carried out to the methane, thus obtaining the natural gas of the rice hulls. The technique of the invention pertains to anaerobic fermentation and has little manpower and low management cost; compared with the biomass heat energy transformation modes, such as cellulosic ethanol, biomass methanol, biological oil, pyrolytic bio-oil, biomass hydrogen production, wheat straw power generation, and the like, the transformable heat energy of biological natural gas is the highest; the technique of the invention pertains to a closed internal recycling system, which is environmentally friendly and has no pollution and high economic benefit.
Owner:浙江格义清洁能源技术有限公司

Pipeline transporting spiral crushing device for solid waste and household garbage

The invention belongs to the technical field of garbage disposal equipment and discloses a pipeline transporting spiral crushing device for solid waste and household garbage. The pipeline transporting spiral crushing device for the solid waste and the household garbage is used for solving the problems that because a direct recycling manner is adopted for scenic spots, stations, airports and other sites which are huge in waste amount and require instantaneous recycling in the prior art, a conveying pipeline can be blocked easily, and the gas explosion noise can be caused easily. The pipeline transporting spiral crushing device for the solid waste and the household garbage comprises a machine body which is provided with a feeding bin; the lower end of the feeding bin is communicated with a feeding channel; the lower end of the feeding channel is communicated with a spiral crushing barrel; the lower end of the spiral crushing barrel is communicated with a conveying pipeline of a matched pneumatic waste recycling system; a hollow rotating shaft is arranged in the spiral crushing barrel; spiral blades are arranged on the periphery of the hollow rotating shaft; a plurality of through grooves formed in the axial direction of the hollow rotating shaft are formed in the circumferential wall of the hollow rotating shaft; a core shaft capable of rotating along with the hollow rotating shaft and capable of moving up and down along the hollow rotating shaft is arranged in the hollow rotating shaft in a sleeved manner; and the core shaft is connected with a plurality of longitudinal cutters capable of sliding up and down in the through grooves.
Owner:浙江易顺通科技有限公司

Oil-gas explosive critical parameter testing device and method

The invention discloses an oil-gas explosive critical parameter testing device. The oil-gas explosive critical parameter testing device comprises an explosion reaction pipe, an inert gas supply device, a vacuum pump, a gas analyzer and an ignition device. The invention provides the explosive critical parameter testing device with a high-energy ignition source, which is used for simulating an actual volatilization state of oil gas in an oil tank and uses the online gas analyzer to test an explosive critical parameter, aiming at the problems that the conventional explosive testing device is lack of guiding and practical values of detection data and the like. The oil-gas explosive critical parameter testing device uses a sealing pipeline with a cross section which has an area equivalent to an area between primary seal and secondary seal of the conventional oil storage tank with the volume of 100,000 cubic meters as an explosion reaction pipe; the oxygen concentration and an oil gas concentration of mixed gas inside the pipeline can be respectively controlled by introducing nitrogen and oil gas; an electric sparkle firing and igniting test is carried out; and the explosive strength of the mixed gas, and the oxygen concentration value and the oil gas concentration value before explosion can be tested, so that the upper limit and the lower limit of the oil gas explosions under different oxygen concentrations can be found out. Therefore, the safe section of the oil-gas mixed gas can be found out.
Owner:VITALONG FIRE SAFETY GRP

Hydraulic cutting and gas explosion combined enhancing extraction method for fracturing coal body in drill hole

The invention discloses a hydraulic cutting and gas explosion combined enhancing extraction method for fracturing a coal body in a drill hole. The hydraulic cutting and gas explosion combined enhancing extraction method is suitable for high-efficiency extraction of underground gas of a coal mine. The enhanced extraction method comprises the following steps: firstly, forming a slot by using a hydraulic cutting technology, relieving the pressure and increasing permeability, and desorbing and gushing gas; secondly, pressing air into a sealed drill hole by using an air pump, wherein the air and the gushed gas from the drill hole form gas mixed gas with the concentration of 9-10 percent; detonating the mixed gas by an ignition device to form an explosive shock wave; fracturing the coal body under the guiding action of the slot. The slot provides a greater explosion space, so that the power of explosion is enhanced and a fracture network in the coal body can be fully constructed; besides, the adsorption potential of gas can be remarkably reduced and the desorption and the flowing of the gas are promoted by the heat effect generated by explosion, so that the aim of enhancing the gas extraction of a coal bed with high-concentration gas and low permeability is achieved. The enhanced extraction method has the advantages of safety, reliability, low cost, simplicity, feasibility, time conservation and force conservation; the influence range of effective pressure relief of single holes can be remarkably widened, and the extraction rate of the gas in the coal bed is increased by over 80 percent.
Owner:CHINA UNIV OF MINING & TECH

Lignite drying and carbonization quality-improving tower with reciprocating and turning-back rolling bed

The invention relates to a lignite drying and carbonization quality-improving device, in particular to a lignite drying and carbonization quality-improving tower with a reciprocating and turning-back rolling bed. In the quality-improving tower, a drying and carbonization reaction chamber is surrounded by a furnace lining; the top of the reaction chamber is provided with a coal conduit, and the inside of the reaction chamber is divided into multiple layers of drying chambers and multiple layers of carbonization chambers from top to bottom; each drying chamber and each carbonization chamber areprovided with an air inlet and an air outlet for introducing and discharging drier or carbonization agent; and each inclined reciprocating grate is installed in each drying chamber and each carbonization chamber, the inclination directions of the reciprocating grates form staggered arrangement from top to bottom, each reciprocating grate is provided with an eccentric drive device, an interlay barrier below the tail part of each reciprocating grate is provided with an interlayer coal seal, a coke quenching tank is connected to the lower part of the interlay coal seal of the carbonization chamber at the bottom layer, and a coal discharging screw conveyer is arranged at the bottom part of the coke quenching tank. The invention solves the problems of raised dust and gas explosion, poor coal layer air permeability, low gas-solid heat transfer efficiency, raw coal burst, nonuniform coal layer temperature and poor regulation and control maneuverability for different sections existing in the traditional lignite drying and carbonization device.
Owner:NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Movable split-type refuge chamber

InactiveCN102003206AAnti-collapseWith heating, drying and humidity adjustmentSafety equipmentsFood storageEngineering
The invention relates to a movable split-type refuge chamber, belonging to the technical field of life saving apparatus. The movable split-type refuge chamber is characterized by comprising a transfer chamber, a main chamber and an auxiliary chamber; the movable transfer chamber and the main chamber which are combined by sealing joints and the movable auxiliary chamber and the main chamber which are combined by sealing joints form the refuge chamber; a transfer chamber body is provided with a front chamber door, the main chamber body is provided with a side chamber door, and the auxiliary chamber is provided with a life saving chamber door; and the refuge chamber is provided with an environment monitoring device, a power supply, a communication telephone, an oxygen gas steel cylinder and/or a food storage device. The movable split-type refuge chamber has the advantages of collapse resistance, gas explosion resistance, sealing of the influx of underground noxious gas, adjustment of temperature and humidity, automatic oxygen supply, free arrangement and combination, favorable air tightness and heat insulation effect, simpleness of installation, convenience and flexibility, investment saving, and ability to provide a set of complete life assurance system for escaping persons on site, and the like.
Owner:天津市天矿电器设备有限公司

Enhanced extraction method for fracturing coal body by multistage gas explosion in drill hole

The invention discloses an enhanced extraction method for fracturing a coal body by multistage gas explosion in a drill hole. The enhanced extraction method is suitable for high-efficiency extraction of underground gas of a coal mine. Air is pressed in a sealed drill hole by using an air pump; the air and gas gushed from the drill hole form gas mixed gas with the concentration of 9-10 percent; the mixed gas is detonated by an ignition device to form an explosive shock wave for fracturing the coal body around the drill hole; the later-stage explosion is realized on the basis of the previous-stage explosion, so that cracks of the coal body around the drill hole are further expanded; besides, the shock wave compress the coal body to form a greater explosion space, and the power of explosion is enhanced. By multistage explosion, a fracture network in the coal body can be fully constructed; besides, the adsorption potential of gas can be remarkably reduced and the desorption and the flowing of the gas are promoted by the heat effect generated by explosion, so that the aim of enhancing the gas extraction of a coal bed with high-concentration gas and low permeability is achieved. The enhanced extraction method has the advantages of low cost, simplicity, feasibility, time conservation and force conservation; the influence range of effective pressure relief of single holes can be remarkably widened, and the extraction rate of the gas in the coal bed is increased by over 60 percent.
Owner:CHINA UNIV OF MINING & TECH

A raw material pretreatment method for improving the dissolution rate of active ingredients of medicinal plants

The invention discloses a raw material gas explosion pretreatment method for improving the dissolution rate of active ingredients of medicinal plants. The method comprises the following steps of: putting materials preimpregnated in water or aqueous solution into a high-pressure container, sealing, introducing a medium, keeping the temperature between 40 and 250 DEG C for 0.5 to 30 minutes, releasing pressure quickly, and discharging the materials in the high-pressure container to a normal-pressure container to obtain materials which are subjected to gas explosion pretreatment, wherein the medium is one or a combination of two of air, carbon dioxide, ozone, liquid nitrogen, nitrogen, water vapor and supercritical CO2. On the basis of the bioactivity of the active ingredients of the medicinal plants, various medium combination gas explosion modes in the low-temperature and high-pressure state are adopted selectively to ensure the treatment strength of the materials, and the dissolution rate of the active ingredients is improved on the premise that the active ingredients are not damaged to improve the utilization rate of raw materials; and the method is quick, simple, economic, high in adaptation degree and wide in selective range, and pollution is avoided, so the method is a significant path for realizing high-value utilization of the medicinal plants.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Coal mining method for co-mining gas in mine

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.
Owner:CHINA UNIV OF MINING & TECH

Method for determining explosion limit of multicomponent mixed gas

The invention relates to a method for determining explosion limit of multicomponent mixed gas. The conventional physical and chemical parameters and the mixture ratio of pure gas are adopted to build corresponding explosion limit prediction models aiming at different classes of multicomponent mixed gas, and the built models are utilized to predict the explosion limit of unknown mixed gas. The method comprises the following steps of: 1, collection of modeling samples of the multicomponent mixed gas and the explosion limit data of the multicomponent mixed gas; 2, classified processing of the modeling samples of the multicomponent mixed gas; 3, determination of the physical and chemical parameters and collection of the data; 4, building of the prediction models; 5, confirmation and correction of the models; 6, and application of the prediction models. The explosion limit is an important indicator for measuring the explosion risk of the mixed gas, and a predicting method for researching the explosion limit of the multicomponent mixed gas has importance for the prediction and monitor of the gas explosion. The method is sample and has high prediction accuracy, and the invention provides a simple, fast, accurate and reliable predicting method for predicting the explosion limit of the multicomponent mixed gas.
Owner:NANJING UNIV OF TECH

Research method of ultralow temperature gas explosion experiment under ultralow temperature environment

The invention discloses a research method of an ultralow temperature gas explosion experiment under an ultralow temperature environment. The research method comprises the following steps: firstly, vacuumizing an exploding tank; secondly, charging a combustible gas to be detected into the exploding tank and cooling; and finally, igniting the combustible gas to be detected, and acquiring and storing the explosion characteristic parameter data in the exploding tank. The research method has the following advantages: aiming at the research method of the ultralow temperature gas explosion experiment under the ultralow temperature environment, the problem that an ultralow temperature gas explosion experiment method can be carried out under the ultralow temperature environment is mainly solved; and aiming at detecting explosion limit of the combustible gas under the ultralow temperature environment, detection and experiment research work for the parameters of the combustible gas under the ultralow temperature environment, such as exploding pressure and pressure ascent rate and the like. The research method of the ultralow temperature gas explosion experiment under the ultralow temperature environment mainly aims at detecting the explosion limit of coal bed methane under the ultralow temperature environment by a cryogenic liquefying process and detecting the exploding characteristic parameters of other industrial combustible gases under the ultralow temperature environment.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD

Exploder for exploding high-pressure gas or/and liquid or supercritical fluid through pressurization

InactiveCN102226675AAchieve explosionRush out quicklyBlastingEngineeringHigh pressure
The invention relates to an exploder for exploding high-pressure gas or/and liquid or supercritical fluid through pressurization, which comprises a high-pressure-resistant container, a heating source body or a pressurizing body and a filling substance, wherein the heating source body or the pressurizing body is internally or externally arranged at any side wall or the lower part of the high-pressure-resistant container of the exploder; at least an explosion slice or pressure release valve is arranged in the high-pressure-resistant container; the gas or liquid or supercritical fluid in the high-pressure-resistant container is pressurized by adopting a self-mounted heat source or an external pressurization device, thus the explosion slice is fractured when the gas or the liquid capable of being gasified or the supercritical fluid is released from the high-pressure-resistant container to reach the control pressure of the selected explosion slice or pressure release valve; the high-pressure gas in the high-pressure-resistant container rapidly bursts out, thereby realizing the explosion of the high-pressure gas; no naked fire exists; the high-pressure-resistant container can bear high pressure and high temperature and can be repeatedly used, thereby lowering the cost; no polluted gas or chemical substance is released to be friendly and safe to the environment; the explosion pressure is controlled by the explosion slice or pressure release valve; and the exploder is applied to various occasions which apply explosives and is particularly convenient to use in coal mines or mines with gas outburst.
Owner:李光武 +2
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