49results about How to "Increase desorption" patented technology

The invention belongs to gas content experiment equipment in a coal bed of a coal mine, and particularly relates to a double-purpose vapor and electric-heating three-shaft desorption and permeation test device. An upper pressing cap (7) is connected with the upper end of a sleeve (26) of a three-shaft pressure chamber (6) by threads; a lower pressing cap (10) is connected with the lower end of the sleeve (26) by threads; a coal sample (28) is mounted in the middle of the sleeve (26); an upper pressing head (27) is mounted above the coal sample (28); a lower pressing head (25) is mounted below the coal sample (28); a baffle (8) is mounted on the connection part of the sleeve (26) on the upper pressing head (27) and the upper pressing cap (7); a piston (5) is mounted at a step of the upper pressing head (27); a thermocouple sensor (9) is mounted in a lower pressing cap hole (10-1); an electric heater (30) is arranged on the upper pressing head (27) and the coal sample (28); a vapor channel (21) is arranged in the upper pressing head (27), the lower pressing head (25) and the coal sample (28); and an upper pressing head hole (27-1) is connected with a methane gas bottle (15) through a pipeline (18) and a pressure adjusting valve (13), so that the gas absorption amount is reduced, and the gas desorption amount and the gas permeation amount in the coal bed can be increased.

The invention discloses a method for strengthening regional gas extraction through hydro-thermal coupling fracturing. The method comprises steps as follows: firstly, a main fracturing hole, branch fracturing holes and lead holes are sequentially formed in a coal seam roadway through construction, the main fracturing hole is formed in the central position of an equilateral triangle, the opening positions of the branch fracturing holes are distributed at three vertexes of the equilateral triangle separately, the borehole bottom locations of the branch fracturing holes are converged in a center line of the equilateral triangle, the lead holes are located in a circle with the main fracturing hole serving as a center of the circle, and the radius of the circle is 5-15 m; fracturing equipment comprises water injection equipment and a powder injection device, and the water injection comprises an intelligent water tank and a fracturing pump. Quicklime powder in the powder injection device is injected into the main fracturing hole and the branch fracturing holes through underground air pressure; the water injection equipment performs hydraulic fracturing on the main fracturing hole, the quicklime powder is carried by high-pressure water to enter cracks, meanwhile, the quicklime powder and water have a thermal reaction to generate a large amount of heat, and hydro-thermal coupling fracturing is realized; with the implementation of the method for strengthening the regional gas extraction through the hydro-thermal coupling fracturing, the regions influenced by fracturing are increased, the concentration of extracted gas is increased, the effect is remarkable, and demands of work such as regional gas treatment in a coal mine site and the like are met.

The invention relates to a composite decarburization solution for capturing carbon dioxide in mixed gas, belonging to the technical field of carbon dioxide gas capture. It relates to a composite decarburization solution, which is composed of solvent benzyl alcohol, phenyl alcohol, N-methylpyrrolidone or a mixture thereof, main absorption component MEA, auxiliary absorption components EDA, DETA and TETA, active components PZ and 2, 3-butanedione, the corrosion inhibitor is sodium chromate, and the antioxidant is sodium metavanadate and copper carbonate. Since the composite decarburization liquid uses a mixed solvent, it not only improves the absorption capacity, purification degree and desorption rate of carbon dioxide, expands the reaction temperature range, but also reduces the volume of the desorption tower, greatly reduces regeneration energy consumption, and reduces equipment investment and operating costs. The invention is mainly used for capturing carbon dioxide in various chemical reaction tail gas, ore decomposition gas, combustion flue gas, natural gas, city gas and biogas, and has broad application prospects.

The invention discloses a method for coal uncovering in a cross cut by hydrothermal coupling based coal fracturing. The method includes: sequentially constructing a main fracturing hole, branched fracturing holes and guide holes in a rock stratum roadway section, wherein the main fracturing hole is formed in the center of an equilateral triangle, hole starting positions of the branched fracturing holes are arranged at three vertexes of the equilateral triangle while hole finishing positions of the same meet at a central line of the equilateral triangle, the guide holes are positioned on a circle taking the main fracturing hole as a circle center and with radius of 5-15m, and herein fracturing equipment comprises water injection equipment composed of an intelligent water tank and a fracturing pump and a powder injector; injecting quicklime powder in the powder injector into the main fracturing hole and the branched fracturing holes through underground air pressure; hydraulically fracturing the main fracturing hole through the water injection equipment, wherein the quicklime powder carried by high-pressure water enters fractures and thermally reacts with water to generate a lot of heat to realize coal uncovering in the cross cut through hydrothermal coupling based coal fracturing. By the method, ground stress and gas pressure of pre-uncovering coal seams are lowered, safety effect is remarkable, and cost is low.

The embodiment of the invention discloses a recovery device and method of shale gas, and relates to the technical field of energy extraction. The recovery device comprises a controller, a hole detection mechanism, an inherent frequency detection mechanism and a vibration generating mechanism; the inherent frequency detection mechanism detects the inherent frequency of a destination layer where perforation holes are located and sends the inherent frequency to the controller; through artificial intelligence control, the vibration frequency of the vibration generating mechanism is adjusted to enable the destination layer to resonate, under a resonant state, methane molecules adsorbed on the surface of a shale matrix are induced to be desorbed, thus the desorbed gas amount is increased, and meanwhile micro fractures continue being generated along the shale bedding surface and continuously extend towards the far end; the permeability of shale of the part is effectively improved, and then the recovery rate of unconventional natural gas is increased; and the condition for generating pressure expansion can further be caused in the shale, thus the tail ends of micropores in the shale continue being fractured and expanded internally to form shale gaps and cracks, and the diffusion and desorption processes of the shale gas are accelerated so as to increase the recovery rate of a shale gaswell.

The invention discloses a reinforced gas extraction method based on a phase change pulse wave. The method comprises the following steps of: firstly, constructing phase change cracking holes on the roadway side of a vertical coal seam, respectively constructing pulse induction holes at 10m positions of the two ends of the phase change cracking holes, arranging phase change cracking pipes in the phase change cracking holes, arranging a gas extraction pipe and a pulse sensor in the pulse induction holes, connecting the pulse sensor with a monitoring station, connecting the phase change cracking pipes with a liquid carbon dioxide storage station through a pressure reducer, connecting the pressure reducer with a pulse frequency modulator through a cable, changing a liquid carbon dioxide phase into gaseous carbon dioxide by controlling the pressure reducer, entering the gaseous carbon dioxide into the phase change cracking holes to crack the coal seam to generate a crack, controlling the pulse wave frequency modulator, so that the gaseous carbon dioxide generates a pulse effect and the gaseous carbon dioxide generates pulse wave crack on the coal seam, and realizing the reinforced gas extraction based on the phase change pulse wave. Through the reinforced gas extraction method based on the phase change pulse wave, the gas desorption amount is large, the gas extraction effect is obvious, the success rate is high, the cost is low, and the needs of gas control and other work in a coal mine field area are met.

The invention provides a composite amine absorbent for absorbing sulfur dioxide and a preparation method thereof, belonging to the field of gas purification and recovery, and the composite amine absorbent comprises the following components in percentage by mass: 30-50% of piperazine and derivatives thereof, 0.5-10% of an activator, 1-5% of a pH corrosion inhibiting solution, 0.1-0.5% of a defoaming agent and the balance of water. The preparation method comprises the following steps of: adding the piperazine and derivatives thereof, the activator, the pH corrosion inhibitor and the defoaming agent into the water according to a certain proportion, dissolving and stirring uniformly. The composite amine for absorbing the sulfur dioxide gas adopts the piperazine as an absorbent main body, and has the characteristics of low viscosity and strong sulfur dioxide absorption selectivity; the saturated absorption capacity can reach 2.6 mol/mol of amine, and the composite amine absorbent has a highdesorption capacity of 1.53 mol/mol. Compared with that of absorption solutions commonly used in industry, the desorption capacity of the composite amine absorbent after multiple absorption can stillreach more than 98%. In addition, the composite amine absorbent is added with a pH slow release liquid to reduce the corrosivity of the amine absorbent to equipment.

Disclosed is a preparation method of a solid adsorption material for biogas decarburizing purification. The preparation method includes pretreating NKA-9, to be specific, filling a resin column with NKA-9, washing NKA-9 with deionized water until generating out-flowing water without any white turbidity; soaking NKA-9 with HNO3 solution, washing NKA-9 with deionized water until generating out-flowing water with neutral pH value; drying cleaned NKA-9 in an oven until its weight is constant; loading organic amine to NKA-9; weighing BPEI, dissolving BPEI completely with stirring at the room temperature by taking absolute methanol as a solvent; weighing pretreated NKA-9 and pouring the same into BPEI dissolved solution, further adding absolute methanol to wash NKA-9 on the wall of a container;stirring systematically until the solvent volatilizes completely; subjecting residues to vacuum drying in a vacuum drying box to obtain the solid adsorption material. The solid adsorption material hashigh adsorption capacity and high stability in adsorption-desorption circulation.

The invention discloses an infrared method for improving a coal bed gas extraction rate. The infrared method for improving the coal bed gas extraction rate comprises the following steps of (1) measuring coal bed physicochemical properties and primarily designing a plurality of groups of infrared parameter schemes; (2) digging a bottom extraction channel or a top extraction channel along a coal bed, punching a transformation hole from the bottom extraction channel or the top extraction channel to the coal bed and arranging extraction drilling holes in the lateral side of the transformation hole; (3) placing an infrared radiation pipe at a coal bed section of the transformation hole, sealing the transformation hole and the extraction drilling holes, directly connecting the extraction drilling holes to a gas extraction pipeline and connecting an infrared control line of the infrared radiation pipe to an infrared controller; (4) opening the infrared controller and continuously irradiating the coal bed through infrared light waves; (5) selecting an optimal parameter scheme with the extraction amount, the extraction concentration and the extraction rate being served as judgment criterions and adjusting an infrared parameter of an integral extraction area construction unit to be an optimal parameter scheme. The infrared method for improving the coal bed gas extraction rate can increase the coal bed gas desorption volume.

The invention relates to a low-energy-consumption desorption system and a low-energy-consumption desorption method for carbon dioxide through cooperation of a catalyst and an external field. Rich liquor absorbing CO2 is conveyed through a rich liquor conveying pump, and the rich liquor and barren liquor conveyed through a barren liquor conveying pump after desorption are subjected to heat exchange in a barren liquor and rich liquor heat exchanger to be heated; the heated rich solution enters a desorption tower, the regenerated barren solution is vaporized by a microwave reboiler and then provides desorption energy for the rich solution in the desorption tower, the barren solution vaporized by the microwave reboiler is in reverse contact with the rich solution, and the contact area sequentially comprises a filler area with an ultrasonic strengthening area and a catalytic area with the ultrasonic strengthening area from top to bottom; the desorbed gas mixture is cooled by a gas-liquid cooler, and liquid obtained after gas-liquid separation by a gas-liquid separator is continuously injected into the desorption tower for circulation; and the energy consumption is reduced by more than 40%. The low-energy-consumption desorption of the carbon dioxide is realized under the action of the catalyst cooperating with the external fields such as the ultrasonic field/microwave electromagnetic field.

The invention discloses a method for strengthening gas extraction through cooperation of hydraulic punching and cave building and steam injection, which comprises the following steps: firstly, drilling a layer-crossing drill hole in a coal seam, injecting high-pressure water into the drill hole for hydraulic punching, so as to form a punching hole in the drill hole, and forming a plurality of cracks around the punching hole; then discharging residues and waste water in the punching hole through a gas-slag separator, and extracting gas; after gas extraction is conducted for a certain time, high-temperature and high-pressure steam is injected into the punching hole, the high-temperature and high-pressure steam exchanges heat with the coal seam after entering the punching hole, the steam enters cracks of the coal seam to further apply pressure, and the cracks of the coal seam are further expanded and developed to achieve secondary fracturing after being subjected to the effects of high temperature and high pressure; and finally, under the multiple actions of high-temperature hydraulic punching, secondary fracturing of high-temperature and high-pressure steam and reduction of coal seam adsorbability, yield increase of gas extraction is achieved. According to the method, the coal seam gas extraction effect can be effectively improved and lasts for a long time, and meanwhile the workload of drilling construction is reduced.

The invention discloses a coal seam heating and pulverized coal removing method. The method comprises the following steps that firstly, the length of a coal seam to be subjected to thermal recovery isL, a ground control center, a generator and a ground wire winding vehicle are arranged on the ground above the coal seam, an intelligent cable winch is arranged on the ground wire winding vehicle, ahigh-temperature-resistant tensile cable is wound around the intelligent cable winch, and a first tension sensor is arranged at the wire outlet end of the intelligent cable winch; and n hollow pipeline robot groups are assembled, one end of the high-temperature-resistant tensile cable is connected with the generator, and the other end of the high-temperature-resistant tensile cable is connected with the rearmost hollow pipeline robot group. In conclusion, the method is high in automation degree, convenient to operate and good in pulverized coal removing effect, and the coalbed methane mining efficiency is improved.

The invention discloses a carbon tank desorption mechanism for a motor vehicle. The carbon tank desorption mechanism comprises a carbon tank, an air filter and an engine supercharger mounted in the motor vehicle, and a Venturi tube, wherein the air filter is connected with an air inlet pipe and an air outlet pipe; the engine supercharger is provided with an air inlet end and an air outlet end; theVenturi tube comprises a shell; the shell comprises an air inlet pipe segment, a desorption pipe segment and an exhaust pipe segment; the air inlet pipe segment of the Venturi tube is connected withthe air outlet end of the engine supercharger; the exhaust pipe segment of the Venturi tube is connected with the air outlet pipe of the air filter; the desorption pipe segment of the Venturi tube isconnected with the carbon tank. The carbon tank desorption mechanism has lower negative influence on an engine, and has a better desorption effect. The Venturi tube is made by one-time injection molding, so that the sealing performance is much more greatly enhanced than before, the defective rate is greatly reduced, and the overall cost of the product is lowered.

The invention provides a pipeline robot used for coal seam heating and pulverized coal removing. The pipeline robot used for coal seam heating and pulverized coal removing comprises a ground wire winding vehicle, a generator, a ground control center and a plurality of groups of hollow pipeline robot sets, an intelligent cable winch is arranged on the ground wire winding vehicle, and a high-temperature-resistant tensile cable is wound on the intelligent cable winch; a plurality of groups of pipeline robots are connected through resistance wires. According to the pipeline robot used for coal seam heating and pulverized coal removing, the multiple groups of pipeline robots are connected through resistance wires, each group of pipeline robots form a relatively sealed space through forms of high-temperature-resistant air bags, electric valve sealing and the like, a high-temperature water-gas mixture generated by heating fracturing water flow by utilizing the resistance wires is pressed intoa coal seam, gas desorption is increased, the permeability of the coal seam is improved, reinforced extraction of the coal-bed methane is realized; and moreover, the multiple groups of pipeline robots have the function of removing pulverized coal, so that the gas production efficiency and the gas production rate of a coal-bed gas well are improved.