252results about How to "Low regeneration energy consumption" patented technology

The present invention provides a method for comprehensively treating high salt content organic industrial wastewater, and relates to the field of the organic material preparing technique. The method of the invention mainly comprises the following steps: executing acid-alkali adjustment to the organic wastewater until pH=7-9, preheating to 30-60 DEG C; introducing the wastewater into a triple effect evaporator for executing triple effect evaporation, executing salting out to the evaporated wastewater which is condensed to a certain degree so that the solid and liquid are separated; separating the concentrated liquid for continuing the condensation; when the separated liquid satisfies a certain requirement, atomizing into an incinerator for incinerating and discharging according to the standard, and introducing the triple effect evaporation condensation water into a biochemical treating system. The method of the invention can totally dispose and remove the organic matter in the high salt content organic industrial wastewater so that the high salt content organic industrial wastewater can be charged according to the standard. The method of the invention has the advantages of unique method, simple technical process, easy operation, low operation cost, large treating capacity, low regeneration energy consumption, no easy forming of secondary pollution after abandon, better economic and social benefit, and wide application range. The method of the invention can be widely applied for the treating of the high salt content organic wastewaters of garbage penetrating fluid, dye intermediate wastewater, etc.

The invention discloses a front-end combined purification process used to produce liquefied natural gas from mixed gas richly containing methane, which comprises four unit parts: acid gas removal, drying and dehydration, heavy hydrocarbon removal and demercuration. The mixed gas firstly undergoes a purification treatment through composite amine solution, CO2, H2S and HCN acid gases in the mixed gas are removed to the concentration less than or equal to 20ppm; the moisture in the gas is removed to a dew point at normal pressure less than or equal to minus 70 DEG C through isopiestic drying and dehydration treatment, then heavy hydrocarbon components above C5 are removed to the concentration less than or equal to 10ppm through temperature-changing pressure-changing absorption and purification treatment; finally the mercury content is removed to the value less than or equal to 0.001mu g/Nm<3> through the demercuration of demercuration adsorbent. The process has better purification effect than the conventional process route, improves the utilization rate of the raw materials and decreases the energy consumption during the purification; and the operation indexes of the units are easier to control.

The invention provides a method for treating hydrochloric acid leachate of ferrotitanium materials. The method comprises the following steps of: dividing and burning leached mother liquid which is obtained by leaching the ferrotitanium materials by using hydrochloric acid leaching liquid; recovering hydrogen chloride obtained by burning for regeneration and cyclic utilization of the leaching liquid. By the method provided by the invention, the leachate is divided according to material balance of the leach elements (mainly comprising iron) of the hydrochloric acid leachate; and one part of theleachate after division is burned and the other part of the leachate is directly or indirectly absorbed by the hydrochloric acid to return to the leaching procedure, so that completely closed circuitcirculation is formed. By the method provided by the invention, the defect of overlarge energy consumption in the burning procedure after the ferrotitanium materials are leached by the conventional hydrochloric acid can be overcome and the burning quantity of the leached mother liquid can be reduced by 40 to 55 percent, so that the energy consumption of the whole process can be reduced by 35 to 45 percent. The method has a good industrial application prospect.

The invention provides an active coke gas purifying method and a device thereof with high desulfurization and denitrification efficiency, energy conservation, little resistance of a bed layer, high utilization rate of the space in an absorption tower and low construction cost. The device comprises a main feed inlet and a gas main outlet which are arranged at the upper part of the absorption tower, a main discharge outlet and a gas main inlet which are arranged at the lower part of the absorption tower and an active coke bed layer which is positioned in the absorption tower, and the active coke bed layer is tilted and has an included angle Alpha with the vertical line. The method has the following steps: gas enters the active code bed layer from the gas main inlet, gas in the tilted bed layer is flowed to the top from the bottom; active coke simultaneously enters the active coke bed layer from the main feed inlet, the active coke in the tilted bed layer is flowed to the bottom from the top; the gas is exhausted from the gas main outlet after the fully tilted convection contact is formed between the gas and the active coke, and the active coke after the saturation by absorption can be discharged from the main discharge outlet.

The invention discloses decompression regeneration system and method for a hollow fiber membrane contactor of a carbon dioxide enriched absorbent solution. The method comprises the steps of: heating the carbon dioxide enriched absorbent solution by a heater, and enabling the pressurized carbon dioxide enriched absorbent solution to enter the tube pass of the hollow fiber membrane contactor for regeneration by a booster pump and a liquid flow meter; outputting the obtained barren solution of the absorbent solution after regeneration from the lower end of the tube pass of the hollow fiber membrane contactor; blowing steam by the low temperature generated by a blowing steam generator under the action of a vacuum pump, and feeding the steam from the lower end of the tube pass of the hollow fiber membrane contactor for assisting regeneration; and dewatering the regenerated CO2 by a condenser under the actions of the blowing of the steam with low temperature and the suction of the vacuum pump to obtain the CO2 gas with high concentration. In the invention, the decompression operation is carried out in the membrane contactor for replacing the traditional heating regeneration method, the regeneration energy consumption of the CO2 absorbent solution is reduced, and the problem of high energy consumption of CO2 separation from fire coal and flue gas by using the chemical absorbent method can be solved.

The invention discloses a cage type carbon dioxide adsorption material as well as a preparation method and an application thereof. The preparation method comprises acidation modification of montmorillonite and synthesis of the cage type carbon dioxide adsorption material. In a preparation process of the cage type adsorption material, an impregnation method is adopted, organic matter is directly covered on the inner surface of a mesoporous molecular sieve, the preparation method is simpler in process and low in energy consumption, desorption and regeneration are easy, and energy consumption and cost in an industrial application process can be greatly reduced. Effective loading capacity of organic amine in the composite material is 10-60%, the composite material has good adsorption and desorption capabilities and good stability, as acidified montmorillonite is adopted as a base material, cost is greatly reduced compared with other molecular sieve porous materials, and the requirement of an industrial process, especially removal of carbon dioxide gas in flue gas, to adsorbent material can be met.

The invention discloses a decarburization solution for recovering and removing carbon dioxide gas from the carbon dioxide flooding produced gas of an oilfield, comprising a main absorbing component, an activating component, a corrosion inhibitor, an antioxidant, a defoamer and water, wherein the main absorbing component is K2CO3 or MDEA (methyldiethanolamine); an auxiliary absorbing component is DIPA (diisopropanolamine) or MEA (mono edawnol amine) or MMEA (methyl monoethanolamine) or AEEA (aminoethylethanolamine) or DMEA (dimethylethanolamine); the activating component is DEA (diethanol amine) or PZ (zinc dimethyldithiocarbamate) or AEP (polyoxyethylene potassium dodecyl phosphate) or TETA (triethylene tetramine) or DETA (diethylenetriamine) or TEPA (tetraethylenepentamine) or glycine; the corrosion inhibitor is V2O5; the antioxidant is sodium metavanadate or potassium tartrate; the defoamer is dimethyl silicon oil or hexanol or heptanol or octanol; and the ratio of the main absorbing component to the auxiliary absorbing component to the activating component to the corrosion inhibitor to the antioxidant to the defoamer is (0.2 to 0.3): (0.03 to 0.05): (0.01 to 0.03): (0.005 to 0.008): (0.005 to 0.008): (0.0005 to 0.001).

The invention provides an organic amine solution for capturing low partial pressure carbon dioxide and belongs to the field of a gas isolation technology. The solvent comprises 10-40% of a main absorption component, 5-20% of an auxiliary absorption component, 0.05-1.0% of a corrosion inhibitor, 0.05-1.0% of an antioxidant and 30-90% of a mixed solvent. The main absorption component is one or more components selected from glycinate, polyetheramine, morpholine and its derivative and polyethylene glycol dimetyl ether. The auxiliary absorption component is one or more components selected from diethylaminoethanol, 2-amino-2-methyl-1-propyl alcohol, N-methyldiethanolamine and hydroxyethyl ethylenediamine. The solution provided by the invention has characteristics of little operation loss, high resistance to oxidation, low energy consumption for regeneration and the like. The solvent is mainly used for capturing carbon dioxide in various gas sources, such as fossil fuel tail gas, chemical reaction tail gas, natural gas and the like. The solvent has good social benefit and economic benefit.

The invention relates to a method and a system for reducing consumption in a capturing process of CO2 through chemical absorption, belongs to the fields of energy utilization, energy conservation and environmental protection. Based on the common CO2 capturing process, the method comprises the following steps that: an absorbent in an absorption tower is used for absorbing CO2 in flue gas and forming a pregnant solution, the obtained pregnant solution is divided into two branches, the two branches of pregnant solution is subjected to CO2 separation in two regeneration towers with different pressures, and waste heat generated during a high-pressure desorption process of the pregnant solution is taken as a heat source of a low-pressure desorption process; CO2 air flows mixed with water vapor after treatment by the regeneration towers are treated by multiple stages of gas-liquid separators, condensers and compressors, so that high-pressure liquid-station CO2 is obtained. With the adoption of the method and the system provided by the invention, the heat consumption during the whole desorption process is reduced, so that the efficient desorption of the pregnant solution flows is realized; under the premise that the capturing rate is 92%, the regenerated energy consumption of an optimal system obtained after improvement of the process is 37.84KJ (reduced work)/mol, and is reduced by 19.77% compared with the energy consumption of 47.16KJ (reduced work)/mol before improvement, and therefore, a new method is provided for reducing the energy consumption for capturing the CO2 with the low energy consumption in thermal power plants.

The invention relates to a molecular sieve ceramic membrane material for olefin purification as well as a preparation method and application of the molecular sieve ceramic membrane material. In the molecular sieve ceramic membrane material, the particle sizes of molecular sieve particles supported on the surface of the ceramic material are 0.1-3 [mu]m, and the thickness of a molecular sieve layeris 3-5 [mu]m; during preparation, ceramic material pretreatment, molecular sieve seed crystal pre-coating and sealed crystallization are sequentially carried out; and the molecular sieve ceramic membrane material is used for removing a polar oxygenated compound in a gaseous olefin flow to be 1ppm or below. Compared with the prior art, the molecular sieve ceramic membrane material prepared by the preparation method of the invention has the molecular sieve layer with higher mechanical strength, larger specific surface area and uniform thickness, in addition, the molecular sieve layer has no longitudinal or horizontal cracks, has no air pores in the surface and is high in bonding strength and not easy to fall off; and when the polar oxygenated compound in the olefin flow is adsorbed, the purification depth is 1ppm or smaller, so that not only is the mass transfer resistance lower, but also the energy consumption is lower, and the regeneration capacity is high.

The invention discloses a carbon dioxide capturing system for concentration conversion and electrolysis regeneration. The bottom of an adsorption column is connected with a feed liquid inlet of a crystallizer; the crystallizer is connected with an inlet of an anode zone of an electrolysis regeneration tank; an overflow inlet of the crystallizer is connected with a cathode inlet of the electrolysis regeneration tank; an electrolysis liquid outlet of the electrolysis regeneration tank is connected with an inlet of a stirring type mixing tank; a barren liquor outlet in the bottom of the stirring and mixing tank is connected with a barren liquor inlet in the upper section of an absorption section; a gas outlet of the cathode zone of the electrolysis regeneration tank is connected with a gas inlet of a first cooler; a gas outlet of the anode zone is connected with a gas inlet of an O2/CO2 separator; a CO2 pregnant solution is concentrated, so that a component loading CO2 is concentrated or separated further in the pregnant solution, and based on the electrochemistry principle, the CO2 pregnant solution is electrolyzed to generate hydrogen, oxygen and CO2 gas; the regeneration energy consumption and capturing cost can be reduced maximally; electricity energy, such as house supply or wind and light abandoned electricity can be fully utilized, and the abandoned electricity storage energy conversion, CO2 capturing and chemical engineering utilization are integrated.

The invention discloses an absorbent which gathers carbon dioxide in flue gas or synthesis gas, comprising the following components by weight percentage: 5-25wt% of 2- methylamino (ethanol), 5-25wt% of primary amine, secondary amine or tertiary amine and 60-90% of water. As the 2- methylamino (ethanol) is a secondary amine which has a higher boiling point compared than other secondary amine, the degradation loss of solvent is less. The absorbent of the invention can be used for gathering various normal-pressure gas mixture, such as carbon dioxide in flue gas or synthesis gas discharged by the enterprises of coal-fired power plants, petrochemical industry and the like. The absorbent has large absorbing volume for carbon dioxide at low partial pressure, the regeneration effect is good and the energy consumption for unit carbon dioxide gathering amount is low.

The invention discloses a method and a device for regenerating a vanadium and tungsten denitration catalyst. In the method, low-temperature plasma reinforced liquid phase regeneration is adopted for denitration catalysts of the series of toxic V2O5-WO3(MoO3)/TiO2 used in actual industry. The method mainly comprises active component repair and pore canal structure recovery of the toxic V2O5-WO3(MoO3)/TiO2 catalysts. The device mainly comprises a shell, a discharge electrode, a grounding electrode and a high-voltage pulse power supply. The method and the device for regenerating the vanadium and tungsten denitration catalyst have the advantages that vanadium and tungsten and other active components lost in a use and regeneration process of the catalyst are supplemented; the pore canal structure of the catalyst is dredged, and the specific surface area is increased; the regeneration efficiency of the catalyst is high; and a regeneration process is simple in technology and low in energy consumption.

The invention specifically relates to a high-selectivity compound desulfurizer and a preparation method thereof, belonging to the field of gas purification techniques. The high-selectivity compound desulfurizer comprises the following raw materials by weight: 60-80 parts of N-methyldiethanolamine, 1-3 parts of an eutectic solvent, 10-30 parts of sterically hindered amine, 0.5-1.5 parts of a non-silicon defoaming agent and 4-8 parts of an antioxidant. The compound desulfurizer provided by the invention overcomes the shortcomings of current refinery gas desulfurization processes, and is simple in process and applicable to desulfurization of most refinery acidic gases. According to the invention, N-methyldiethanolamine, the eutectic solvent and sterically hindered amine are compounded, and the supplementation effect and synergism of the above three components enhance the respective desulfurization effect of the components; and the high-selectivity compound desulfurizer has high purification depth, large absorption capacity, low energy consumption for regeneration, environment friendliness and other advantages.

The invention discloses a preparation method of a magnesium oxide-mesoporous carbon composite material. The method is characterized by comprising the following steps: oxidizing the surface of a carbon material by adopting mesoporous carbon as a carrier, so that the carbon material is more likely to adsorb a metal salt solution; eliminating water impurities in pores in a vacuum drying box, so that the pores are adequately opened; adding a magnesium nitride solution onto the carbon material to be completely absorbed; and roasting the carbon material under the inert gas after the solution is completely volatized, so that the magnesium nitride is decomposed into magnesium oxide to be remained in the pores of the mesoporous carbon. The magnesium oxide-mesoporous carbon composite material prepared by the method is high in specific surface area and high in magnesium oxide loading capacity; when being applied to the carbon dioxide adsorption at a high temperature, the magnesium oxide-mesoporous carbon composite material has the following good properties: the adsorption capacity of CO2 at the temperature of 50 to 80 DEG C and the pressure of 0.1MPa to 0.2MPa is 2.0 to 2.5 mmol/g, the adsorption agent can be reduced and regenerated at the temperature of 350 to 500 DEG C, and the magnesium oxide-mesoporous carbon composite material is a CO2 adsorption material with a promising application prospect.

The invention discloses a solid absorbent with high CO2 adsorption capacity and a preparation method thereof. The solid absorbent comprises active components and a carrier; the active components are alkali carbonate and an amino group at the surface of the carrier, and are 15-60% of total quality of the solid absorbent; the molar ratio of the alkali carbonate and the amino group is 1 to (0.5-25); and the carrier is monox, and is 40-85% of total quality of the solid absorbent. The preparation method comprises the following steps of mixing and stirring the materials into emulsion; putting the emulsion into air to form cross-linking gel; putting the gel into a sealed dryer; soaking the gel by ethanol; and drying and screening the gel by a supercritical drying method, so as to prepare the solid absorbent with high CO2 adsorption capacity. The absorbent is low in price, stable in structure, high in carbonic acid conversion ratio, not easy to inactivate, and small in corrosion on equipment, and has certain mechanical strength, and high cyclic utilization rate; and the preparation method of the absorbent is convenient to operate, and low in expenses.

The invention relates to an IGCC (Integrated Gasification Combined Cycle) based pre-combustion CO2 capture system, which comprises a sulfur-resistant conversion device, an MDEA (Methyl Di Ethanol Amine) desulfurization and decarbonization device and a sulfur and carbon separating device, wherein the sulfur-resistant conversion device is used for converting CO in a synthesis gas into a mixed gas consisting mainly of CO2-H2 in a converting furnace, and the MDEA desulfurization and decarbonization device comprises an absorption tower and a desorption tower; the absorption tower is used for receiving the mixed gas in the sulfur-resistant conversion device and for absorbing CO2 and H2S gases, and the desorption tower is used for receiving CO2 and H2S containing rich solution in the absorption tower and for desorbing CO2 and H2S; the sulfur and carbon separating device comprises a desulfurization purifier for receiving the CO2 and H2S gases in the desorption tower; and H2S gas is absorbed by an H2S absorber, and finally the CO2 gas is obtained. According to the IGCC based pre-combustion CO2 capture system, CO2 and H2S are simultaneously removed by a lean solution-half-lean solution MDEA method, so that the absorption rate of CO2 is improved, and the exhaust to air is reduced; and the heat generated by the conversion process of gas is fully utilized to heat MDEA rich solution for regeneration, and the consumption of medium-pressure steam is reduced.

The invention relates to a method and device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets, and provides a method for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets. The method comprises (i) atomizing a methyldiethanolamine solution by ultrasonic atomization to give liquid droplets with a size of 10-15mum; (ii) uniformly mixing the obtained methyldiethanolamine liquid droplets with a gas containing hydrogen sulfide and spraying the mixture into a cyclone within time shorten than one second; (iii) in the cyclone, allowing the methyldiethanolamine liquid droplets to absorb the hydrogen sulfide in the gas while separating the methyldiethanolamine liquid droplets in the cyclone field of the cyclone, and aggregating to form a hydrogen sulfide-rich methyldiethanolamine solution; and (iv) recycling the hydrogen sulfide-rich methyldiethanolamine solution, atomizing by ultrasonic atomization to give liquid droplets, and cyclically using the liquid droplets in the step (ii). Also provided is a device for selectively removing hydrogen sulfide by use of ultrasonically atomized liquid droplets.