309results about How to "Improve desorption efficiency" patented technology

The invention discloses a nitrogen purging-assisted organic exhaust gas recycling method through the pressure swing adsorption of adsorbent resin. The organic exhaust gas recycling method comprises the following steps: (1) adsorption, namely performing adsorption when exhaust gas including volatile organic compounds (VOCs) enters an adsorber filled with the macroporous adsorption resin by a gas collection system; (2) desorption, namely vacuumizing the adsorbent resin in the adsorber and purging the adsorbent resin by using nitrogen in an auxiliary manner to desorb the adsorbed VOCs from the adsorbent resin to obtain the desorbed gas; and (3) recycling, namely condensing or absorbing the desorbed gas to recycle the VOCs. The adsorbent adopted by the method disclosed by the invention is the macroporous adsorption resin, the surface of the macroporous adsorption resin has no catalytic performance and has the characteristics of being easy to regenerate, high in mechanical strength, great in volumetric adsorption capacity and the like. A adsorption technique assisted by nitrogen purging in vacuum at normal temperature is high in adsorption efficiency and has the very excellent recycling effect on VOCs gas which can be easily oxidized and hydrolyzed or is high in solubility.

The invention relates to a recovering method and a recovering system for hydrocarbon and other volatile organic matters in refineries, chemical plants, large bulk plants, refuelling stations and the like. Oil gas is absorbed by two sections of stuffing in an absorption tower and then enters two activated carbon adsorption towers which run alternately; the oil gas reaches the standard after being absorbed by activated carbon, and then is discharged to the air; after the substance that is generated after desorption of the activated carbon is condensed and treated through oil-water separation, the obtained hydrocarbon liquid is conveyed to a storage tank, generated sewage is conveyed to a sewage treatment device to be treated, and a small amount of gas that is not condensed returns to the absorption tower; solvent that absorbs oil gas enters a desorption tower so as to desorb solvent and oil gas; and the hydrocarbon liquid is conveyed to the storage tank to be stored. The method and the system, which are provided by the invention, have the characteristics of smaller investment, longer operation period of equipment, high oil gas recovery rate and simple technological process.

A fuel vapor processor has a fuel tank, a canister, a vapor pipe, a recovery pipe, an air pipe, a suction device, a vapor pipe valve, an air pipe valve, and a pressure regulator. The vapor pipe leads fuel vapor generated in the fuel tank to the canister for trapping the fuel vapor in the canister. The recovery pipe recoveries the fuel vapor desorbed from the canister into the fuel tank. The air pipe communicates the canister with the atmosphere. The suction device is disposed on the recovery pipe for desorbing the fuel vapor trapped in the canister. The pressure regulator is communicated with the air pipe between the air pipe valve and the canister in order to allow gas flow from the atmosphere toward the canister. During desorption of the fuel vapor due to the suction device, the vapor pipe valve and the air pipe valve are closed, and negative pressure is kept in the canister such that the fuel vapor is desorbed from the canister and fresh air is led into the canister via the pressure regulator.

The invention discloses a sampling adsorption pipe and heat desorber, wherein the sampling adsorption pipe is composed of reducing steel pipe with middle displaying thick diameter pipe; the adsorbent is filled with the thick diameter pipe with glass or quartz hair filling with two ends of adsorbent; two ends of sampling adsorption pipe is thin diameter pipe separately; one end of thin diameter pipe is an outlet pipe, which connects the thick diameter pipe stickly; the other end of thin diameter pipe is inlet pipe, which connects the thick diameter pipe through cap; the heat desorber is a metal block of internal heating bar with a cavity in the middle of metal block to contain the sampling adsorption pipe; the other end of heat desorber contains groove position to allocate the sampling adsorption pipe; when desorbed, the heat desorber is heated to preset temperature, which contains the thick diameter pipe of sampling adsorption pipe in the cavity to heat; the nut is inserted in the groove position of heat desorber, which takes the desorbed sample in the gas chromatograph analysis column.

A sulfur-transferring catalyst comprises a cerium oxide of 2í½30úÑ by weight as the active component and a spinel compound of 70í½98úÑ by weight containing magnetium and aluminum as the carrier. The spinel compound containing magnetium and aluminum comprises MgO of 5í½70úÑ, Al2O3 of 30í½ 95%, an oxide of a rare earth element of 0í½15 úÑ except cerium, V2O5 of 0í½10úÑ,relative to the total weight of the compound. Moreover, the invention provides a method of producing the catalyst. The sulfur-transferring catalyst has a high efficiency of absorbing and desorbing SO x.

The present invention relates to an adsorbent using the porous organic-inorganic hybrid material(s) containing iron having a large surface area and a high pore volume, in particular, a water adsorbent. Also, it relates to an adsorbent that can be used in humidifiers, dehumidifiers, coolers/heaters, a refrigerating machine or an air conditioner, etc., which can easily absorb or desorb at 100° C. and below, and has a great adsorption amount per weight of the adsorbent.

Also, the present invention relates to a novel preparation method of porous organic-inorganic hybrid material(s), in particular, a preparation method characterized by not using hydrofluoric acid, porous organic-inorganic hybrid material(s) prepared by said preparation method, and a use as an adsorbent thereof.

The present invention provides a canister mounted in a vehicle to reduce the discharge of fuel gas and, more particularly, a canister with a heater configured such that fuel gas adsorbed onto active carbon filled in the canister is more easily desorbed from the active carbon and introduced into an engine. The canister with the heater according to the present invention includes a canister housing including a tank port and a purge port, which are provided at the top thereof, and a plurality of inlet holes provided on one side thereof to introduce air; and a heater connected to the top of the plurality of inlet holes of the canister housing and including an air port provided at the top thereof, an open bottom, and a heater module provided therein.

An enzyme-catalyzed desorption process for releasing CO₂ gas from an ion-rich solution containing bicarbonate ions includes providing carbonic anhydrase in the ion-rich solution such that in a desorption unit the carbonic anhydrase is allowed to flow with the ion-rich solution while promoting conversion of the bicarbonate ions into CO₂ gas and generating an ion-depleted solution and releasing the CO₂ gas and the ion-depleted solution from the desorption unit. A CO₂ capture process includes contacting a CO₂-containing gas with a solution in an absorption unit, to convert CO₂ into ions; feeding an ion-rich solution to a desorption unit wherein carbonic anhydrase is present within the ion-rich solution to generate an ion-depleted solution and, preferably, recycling the ion-depleted solution. Methods of decreasing the CO₂ desorption temperature in a desorption unit, decreasing the CO₂ desorption reactor size, and decreasing the CO₂ desorption energy input in a desorption unit, are also described.

A method and an apparatus for desorption and a dehumidifier are provided in the present invention, in which an electrical potential is applied to electrodes disposed on both ends of an absorbing material so as to desorb the substances absorbed within the absorbing material whereby the absorbing material is capable of being maintained for cycling the absorbing operation. By means of the method and the apparatus of the present invention, the desorbing efficiency can be enhanced and the energy consumption can be reduced during desorption.

The invention discloses an organically-polluted soil remediation method which refers to a conveyer, a rotary kiln, a roasting furnace wall, a roasting chamber, a material inlet, a material outlet, a heating channel, a heating channel heat inlet, a heating channel heat outlet, a polluting gas outlet, a combustion furnace, a combustion furnace gas inlet, a combustion furnace heat outlet, a bag deduster, a bag deduster air inlet, a bag deduster smoke outlet, a soil particle outlet, an exhaust fan, a chimney, a deacidification device, a cooler, a cooler feed port, a cooler hot air outlet and a cooler discharge port. Since indirect heating desorption is adopted, hot air and soil are not in direct contact, energy consumption is low, desorption efficiency is high, and the soil can be thoroughly remedied; separated organic pollutants enter the combustion furnace to be completely combusted and decomposed by enriched oxygen, as a result, exhausted air quantity is small, secondary pollution is not caused, energy is saved, efficiency is improved, and investment is low.

The invention discloses a method for manufacturing desulfurization denitration activated carbon by using waste activated carbon. The method comprises the steps of grinding, mixing, pelleting, drying and regeneration. In the step of grinding, waste carbon is ground into powder, and the through put of the powder passing through a sieve of 180-240 meshes according to the grain fineness is 98%; in the step of mixing, 68-80% of waste activated carbon, 18-30% of tar and 2% of potassium hydroxide or magnesium oxide are prepared in percentage by weight; in the step of pelleting, the carbon paste is prepared into particles of which the particle diameter is 2-10mm; in the step of drying, the cylindrical particles are dried; and in the step of regeneration, the waste activated carbon cylindrical particles are added into an internal-heated rotary furnace for heating without air, the temperature is controlled between 820 and 900 DEG C, the time is 30-40 minutes, and water vapor is introduced into the furnace. According to the method, a powdery waste activated carbon source can be recycled, and can be recycled for four times or more after being treated by the process provided by the invention, and finally, the carbon with too high ash content can be recycled as sewage treatment carbon.

The invention discloses a cold and hot type adsorption-desorption device and an adsorption-desorption method thereof, belonging to a device and a method for treating organic waste gas. The device comprises an adsorption tank which is provided with an opening used for leading in waste gas and vacuumizing, a clean gas outlet, a tube pass inlet used for leading in cold medium or hot medium and a tubepass outlet used for leading out cold medium or hot medium; the adsorption tank is internally provided with tube arrays which are evenly distributed in the adsorption tank, and the two ends of the tube arrays are respectively communicated with the tube pass inlet and the tube pass outlet; a shell pass of the adsorption tank is internally filled with adsorbing medium which surrounds the tube arrays; and the adsorption tank also carries out low temperature adsorption and high temperature desorption operations. In the invention, the adsorption tank is provided with tube arrays, and cold medium or hot medium can be led into the tube arrays, thus realizing low temperature adsorption and high temperature desorption operations, reducing the level of vacuumizing, saving energy consumption, substantially reducing requirements on the device in the desorption process, improving the adsorption and desorption efficiency, prolonging the service life of the adsorption medium and saving production cost.

The invention relates to an adsorption purification unit for recycling organic solvent from waste gas, comprising a shell and an active carbon bed layer filled in the shell, the side wall of the shell is provided with an air inlet and an air outlet, the two ends of the active carbon bed layer are provided with electrodes, an elastic compacting device is arranged between the shell and the active carbon bed layer, the active carbon bed layer is internally provided with electric couplers, and the electrodes and the electric couplers are respectively connected with an electrothermal controllers. In the invention, granular active carbon is adopted as adsorbent, the loading density is high, the adsorption capacity is high, the work cycle is long, the loss caused by loading density of activated carbon fibers and frequent adsorption-desorption switching on equipment can be avoided, the replacement cycle of the adsorbent is long, and the maintenance cost is low; the recycled solvent contains no water, the purity is high, and the quality is high, thus the solvent can be directly recycled for production; no waste water is produced, no secondary pollution is caused, and discharge reaching thestandard can be realized; the energy consumption is low, the operating cost is low, and the adsorption purification unit can be applied to recycling of high-boiling point solvent, thus the application field of solvent recycling equipment is expanded.

The invention relates to an automatic high-efficiency energy-saving purification system for industrial volatilizable organic pollutants, which is characterized in that: (1) both opposite side walls of an active carbon bed body of an adsorption bed are set into side walls with hollow structures, an active carbon clapboard is set into an active carbon clapboard with a hollow structure, the active carbon clapboard with the hollow structure is communicated with the side walls with the hollow structures, and the two side walls with the hollow structures are respectively provided with a hot air inlet and a hot air outlet; and (2) a catalytic combustion bed is connected with a plate-type heat exchanger, and the plate-type heat exchanger is connected with the hot air inlets on the side walls withthe hollow structures of the adsorption bed through an adsorption bed heating fan. The automatic high-efficiency energy-saving purification system for the for industrial volatilizable organic pollutants has a simple and reasonable structure, can effectively reduce energy consumption, improve the purifying rate, prolong the service life of a catalyst, shorten the desorption process time, improve the purifying efficiency and reduce the operating cost, and is safe and reliable.

The invention relates to an organic waste gas treatment system and a treatment method thereof. The organic waste gas treatment system comprises a plurality of organic waste gas supply devices (1), anadsorption and desorption device (2), a catalytic combustion device (3) and a control device (4); and the adsorption and desorption device (2) comprises a first adsorption and desorption chamber (11)and a second adsorption and desorption chamber (12) which are used alternately, the catalytic combustion device (3) comprises a wind dividing cutting heat exchanging part (28), a heat storage part (37) and a catalytic combustion part (40), the control device (4) comprises a frequency converter (46) controlling the flow velocity or the flow quantity, a constant temperature control unit enabling a preset temperature, a first rising temperature, a second rising temperature and a heating temperature of heating of a burner to be constant within a preset range, and a treatment unit (78) which is connected with the frequency converter (46) and the constant temperature control unit (47). The treatment method automatically conducts high-efficiency purification treatment on a plurality of organic waste gas sources simultaneously, the heat is utilized maximumly, and the purifying effect is stable.

The invention relates to an adsorbent for removing sulfate ions contained in a water body as well as preparation and application thereof. The adsorbent is a poly (m-phenylenediamine) adsorbent obtained through chemical oxidation polymerization reaction at room temperature by taking m-phenylenediamine as a monomer and ammonium persulfate as an oxidant. The poly (m-phenylenediamine) adsorbent disclosed by the invention has the advantages of simple synthetic process, low cost, good removing effect on sulfate radicals contained in the water body, adsorption quantity reaching more than 107 mg.g<-1> and no secondary pollution; by means of the poly (m-phenylenediamine) adsorbent disclosed by the invention, the treatment effect on waste water with sulfate ion concentration lower than 500 mg.L<-1> can reach more than 95 percent, adsorption rate is high, and adsorption equilibrium can be achieved within 10 minutes; in addition, multiple adsorption results indicate that the desorption rate of poly (m-phenylenediamine) is about 95 percent, and the poly (m-phenylenediamine) can be effectively recycled.

An evaporated fuel treatment apparatus is mounted in a vehicle having an engine, a fuel tank storing fuel for the engine, and a battery, the evaporated fuel treatment apparatus adsorbing evaporated fuel in the fuel tank on an adsorbent in a canister container, desorbing the evaporated fuel adsorbed on the adsorbent therefrom during engine running, and directing the evaporated fuel to an intake passage of the engine. The adsorbent in the canister is heated by heat generated by the battery.

A method for combining integrated drilling and slotting with oscillating thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coal seam areas. A number of slots are formed within a thermal injection/extraction borehole by means of integrated drilling and slotting technology; a steam generator, is then used to three high-pressure, cyclically temperature-changing steam into said borehole; the steam passing through a spinning, oscillating-pulse jet nozzle forms an oscillating superheated steam, heating the coal body. The present method overcomes the limitations of simple permeability-increasing techniques, the slotting by means of hydraulic. pressure significantly increasing the pressure relief range of a single borehole and forming a fracture network that provides channels for passage of the superheated steam, while oscillating variation in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of the two enhances the efficiency of gas desorption and extraction.