38results about How to "Increase desorption rate" patented technology

A slotting induced-flow pressure-relief anti-reflection method for a complicated seam is suitable for gas control of high-gas high-ground-stress complicated seam regions, can improve the gas permeability and gas desorption rate of coal, solves the difficult problems of low exhausting and mining efficiencies of coal-bed gas, high drilling construction load and the like, and realizes efficient gas exhausting and mining as well as fast outburst elimination of the complicated seam. High-pressure water is jetted into drilled holes to cut and destroy the coal in a rotary manner, and the coal in the radial direction of the drilled holes is destroyed and disturbed, so that buckling failures of the coal are induced and the coal and the gas are enabled to be spouted out of the drilled holes, as a result, the gas expansion energy of the coal is released, coal cracks are expanded and the exposure surface area of the coal is increased. therefore, the gas exhausting and mining efficiencies of coal are improved, coal and gas burst risks are eliminated, the effective influence range of drilling gas exhausting and mining is improved by 1-3 times, the air permeability coefficient of coal around the drilled holes is improved by 100-200 times, the drilling methane gas exhausting and mining quantity is improved by 2-5 times within hundreds of meters, and the outburst elimination time of the coal bed is shortened by 30-50 percent. The slotting induced-flow pressure-relief anti-reflection method for the complicated seam has very good field application value and social benefits.

The invention provides a thermal exploiting system and method for coalbed methane. The thermal exploiting system for the coalbed methane comprises a set of gas injecting system and a set of gas exploiting system; the gas injecting system comprises a gas heater, a booster pump, a high-temperature steam generator, a gas mixing box, two valves, a water storage tank, a water pumping pump and a ventilating pipeline; and the gas exploiting system comprises two gas exploiting pipelines and two valves. High temperature mixed gas is injected through the gas injecting system, heat is transferred to a coalbed, so that the temperature of the coalbed is increased to 50-80 DEG C, free energy of coalbed methane is improved and acting force between molecules is destroyed, the gas absorbed in a coalbed gap and on the surface of coal is desorbed, and the coalbed methane is obtained.

The invention relates to an automatic reinjection water heating production increasing process of a coal-bed gas well. The process comprises the following steps: A, performing precipitation and filtration treatment on produced liquid once or for more times to remove more than 95 percent of solid particles; B, heating the treated clear liquid through solar energy to increase the water temperature to 60-90 DEG C; C, injecting hot water into a shaft through a hot water reinjection pipeline, extending the hot water reinjection pipeline to the space below a coal bed through an oil sleeve annulus and increasing the temperature of the original shaft liquid to over 20 percent; D, circularly performing the steps. The process has the advantages that the heat energy is injected into the shaft liquid in a hot water injection mode and the brownian motion of coal dust in the shaft liquid is increased so as to increase the divergence of the coal dust in the water, favorably reduce the concentration of the coal dust and discharge the coal dust, besides a part of heat energy is transferred to a coal-bed gas storage layer of an immediate vicinity of a wellbore, so that the free energy of the coal-bed gas can be increased to increase the desorption rate of the coal-bed gas, and meanwhile the gas is expanded on heating, so that a seepage passage can be expanded, the permeability of a reservoir stratum is improved and the production increase of the coal-bed gas is realized.

The invention relates to a coal reservoir water locking damage control method, which comprises the following steps that:1, a ground coal-bed gas well subjected to fracturing transformation is selected; 2, reservoir coal samples are collected on sites, and the contact angle of water on the coal sample surface is tested in an indoor position; 3, quickly penetrating agents T and chlorine dioxides are added into fracturing fluid, the concentration of the quickly penetrating agents T is selected according to the contact angle of the water on the coal sample surface, and the concentration of the chlorine dioxide is selected according to the coal rank of the coal samples (the metamorphism degree of the coal samples); 4, after the quickly penetrating agents T and the chlorine dioxides are added, the uniformly stirred fracturing fluid can be used as ahead fluid, or is used as sand-carrying fluid to be subjected to joint hydraulic fracturing with non-active water fracturing fluid, and 20 to 30 cubic meters of active water fracturing fluid needs to be pumped between the ahead fluid and the sand-carrying fluid for isolation; and 5, the fracturing fluid return and discharging can start only after at least 3 hours from the hydraulic fracturing completion. The coal reservoir water locking damage control method has the advantages that the capillary resistance and the surface tension of a coal-bed gas reservoir layer are reduced; the reservoir layer water locking damage is reduced; the coal-bed gas reservoir layer is favorably protected; and the coal-bed gas recovery rate is favorably improved.

The invention belongs to the technical field of space flight and aviation life support and environmental control, particularly relates to an integrated combined treatment device and method for non-consumption type carbon dioxide and water. The device comprises an air supply unit, an adsorption and desorption unit, and necessary control valves, connection pipelines and control systems, wherein the adsorption and desorption unit is an integrated separator and is divided into a lower adsorber and an upper adsorber; a hydrophobic carbon dioxide hollow fiber molecular sieve in the lower adsorber is used as an adsorbent and is used for adsorbing the carbon dioxide in gas; a mesoporous zeolite hollow fiber molecular sieve in the upper adsorber is used as an adsorbent and is used for adsorbing the water in the gas; a desorption device is arranged between the lower adsorber and the upper adsorber and is used for performing heating and regeneration on the used adsorbent. A plurality of integrated separators can be provided, which are connected in parallel or series to operate. The device can effectively realize integrated treatment of the carbon dioxide and the water in a cabin, and can reduce the weight and the power consumption of a system and the consumable supply demand.

The invention belongs to the technical field of treatment of low-concentration ammonia-nitrogen wastewater and discloses a method for achieving stable nitrosation of low-concentration ammonia-nitrogenwastewater. The method comprises the following steps: (1) introducing low-concentration ammonia-nitrogen wastewater into a fixed-bed reactor filled with an ammonia-nitrogen adsorbent for adsorbing, then inoculating the wastewater with nitration sludge for carrying out biofilm formation culturing after finishing adsorbing; (2) discharging wastewater, introducing the low-concentration ammonia-nitrogen wastewater for adsorbing, stopping supplying water when the ammonia-nitrogen concentration in the discharged water is close to a discharge limit value and finishing adsorbing; (3) adding alkali into the fixed-bed reactor after finishing adsorbing, aerating, increasing the temperature, carrying out biochemical desorption under an internal circulation condition and discharging regenerated liquid; (4) introducing the low-concentration ammonia-nitrogen wastewater into the fixed-bed reactor again for adsorbing; (5) finishing adsorbing and carrying out biochemical desorption according to step (3); and (6) circulating steps (4) and (5). The method is capable of achieving stable nitrosation of the low-concentration ammonia-nitrogen wastewater; meanwhile, the regenerated liquid contains high-concentration nitrite nitrogen, so that the subsequent denitrification treatment cost can be reduced.

The invention provides a reinforced desorption method of an acidic gas. The method is characterized in that inner groove-shaped micro-channels are introduced to a micro-channel reactor, and desorption process reinforcement of a carbon dioxide absorption liquid is carried out under 0.1-1MPa at 90-160DEG C for 0.01-100s. The micro-reactor comprises a plate heat exchange unit and a plate desorption unit, and the plate desorption unit is formed by the parallel inner groove-shaped micro-channels. The method can realize carbon dioxide desorption in an extremely short time, prevent absorbent overheating and reduce the volume of evaporated water, and has a small size in order to greatly reduce the energy and material consumption in the desorption process of the carbon dioxide absorption liquid and the occupied area. The energy consumption, the material consumption and the occupied area of the reinforced desorption method are respectively 20% or above lower than those of traditional tower desorption systems.

The invention discloses an intelligent constant temperature and ultrasonic wave promoting desorption integrated coal sample tank and a using method thereof. The coal sample tank comprises a tank bodyand a tank cover, the tank cover is provided with an exhaust pipe, and the exhaust pipe is provided with a gas flow meter and an air exhaust valve. A temperature regulating inner container is arrangedon the inner wall of the tank body, and a thermal insulating layer is further arranged between the temperature regulating inner container and the inner wall of the tank body. A temperature sensor isinstalled in the tank body, and an intelligent temperature control device is installed on the side wall of the tank body. The temperature regulating inner container and the temperature sensor are bothelectrically connected with the intelligent temperature control device. According to the intelligent constant temperature and ultrasonic wave promoting desorption integrated coal sample tank and theusing method thereof, intelligent dynamic regulation and ultrasonic wave desorption promotion of the temperature inside the tank body can be performed for arbitrary downhole temperature, and adsorption gas in a coal sample is evenly oscillated, so that the gas desorption rate in the coal sample is accelerated, the desorption is more complete, and the determination of gas content in underground coal samples is more accurate.

The invention discloses a vacuum thermal regeneration method of saturated activated carbon for adsorbing VOCs (Volatile Organic Compounds), which comprises the following processes: in a vacuum environment of 10Pa-100Pa, heating the activated carbon for adsorbing the VOCs to 280-350 DEG C, preserving heat for 20-40 minutes, and then breaking vacuum when the activated carbon is cooled to 100 DEG C or below along with a furnace, so as to realize regeneration of the activated carbon for adsorbing the VOCs. Compared with a traditional thermal desorption method and an existing vacuum regeneration method, the method has the advantages that the desorption efficiency is higher, the desorption speed is higher, meanwhile, the pore size distribution of the activated carbon is improved, the number of micropores is increased, and the activated carbon can be recovered to 95% or above of the adsorption performance of new activated carbon after being regenerated for 10 times.

The invention belongs to the technical field of life support and environmental control in spaceflight and aviation and particularly relates to a non-consumptive type device and method for removing multisource trace harmful gases. The non-consumptive type device comprises an air feeding unit and an adsorbing and desorbing unit, and also comprises necessary parts, namely a control valve, a connecting pipeline and a control system, wherein the adsorbing and desorbing unit is an integrated separator, and comprises a lower adsorber and an upper adsorber; the lower adsorber adopts a large-aperture hydrophobic type hollow fiber molecular sieve as an adsorbent for adsorbing toxic and harmful gases in raw gas; the upper adsorber adopts a small-aperture hydrophobic type hollow fiber molecular sieve as an adsorbent for adsorbing a little amount of toxic and harmful gas molecules with smaller particle diameter and water; a desorbing device is arranged between the upper adsorber and the lower adsorber and is used for heating and regenerating the used adsorbent. Multiple integrated separators can be arranged in parallel or in series for operation. The non-consumptive type device has the advantages that broad-spectrum comprehensive removal of multisource trace harmful gases in a cabin can be effectively realized, and the weight, the power consumption and consumable supplementing need of the system are reduced.