45results about How to "Synergistic removal" patented technology

The invention relates to an absorption liquid which is used for desulfurization, denitration and demercuration integrated and coordinated in a jet bubbling method, and comprises limestone slurry with the mass concentration of 5 percent to 30 percent. Furthermore, a strong oxidizer is added into the limestone slurry.

An integral device of garbage burning and waste gas purifying is prepared as setting primary air inlet at bottom of boiler and garbage / lime powder inlet at middle ¿C bottom of boiler, connecting boiler top to cyclone through flue pipe, connecting cyclone bottom to material feedback mechanism with its bottom being connected to boiler bottom, connecting cyclone top to cooling tower bottom through flue pipe and setting water spraying nozzle opposite to flowing direction of smoke, connecting cooling tower top to bag ¿C type collector through neck flue pipe with inlets of iron fly ash and activated carbon, setting purified gas outlet and filtering material layer on bag ¿C type collector.

The invention discloses an electrostatic cooperative pollutant removing method and device. The method comprises the following steps: firstly, conveying exhaust gas to an electrostatic dust collector for dust removal in advance, thus removing more than 90% of particles in the exhaust gas; secondly, generating low-temperature plasmas by a low-temperature plasma generating system, oxidizing and degrading pollutants in the exhaust gas subjected to dust removal in advance; thirdly, sucking or adsorbing the exhaust gas processed in the second step with a calcium oxide powder spraying method; fourthly, conveying the exhaust gas processed in the third step and used calcium oxide powder to a high-frequency impulse power supply electrostatic dust collector. The device is simple in system, compact in structure, high in pollutant removal efficiency, little in equipment investment, small in occupied space and low in operating cost.

A device of purifying waste gas of garbage ¿C burning is prepared as setting smoke inlet at top end of cooling tower; setting water spraying nozzle opposite to flowing direction of smoke; setting S form flue pipe between cooling tower bottom and top of bag ¿C type collector; setting lime powder inlet at bottom section of said flue pipe, iron fly ash inlet at middle section of said flue pipe and activated carbon inlet at top section of said flue pipe; setting filter material layer in bag ¿C type collector and setting purified gas outlet at top side of bag ¿C type collector.

The invention discloses a water-saving and energy-saving ammonia desulphurization ultra-clean discharge system and process capable of preventing ammonia from escaping from aerosol. The system comprises a slurry disturbance system, a cooling concentration crystallization system, a sulfur oxide absorption system, an ammonia capture system, a washing purification system and a crystal particle enlarging system, circulating spray liquid of the desulfurizing tower from bottom to top adopts solutions with different components, and the concentration gradient is decreased progressively so that the desulfurizing efficiency is effectively improved, escape of aerosol and ammonia is avoided, and the phenomena of trailing and falling of ammonia-process desulfurized flue gas are eliminated. Different technologies such as multi-stage cyclone coupling, packing, a demister, an efficient cyclone water film dust collector and a wire mesh demister are combined, optimization of the distribution condition offlue gas in the tower is achieved, the retention reaction time of the flue gas is prolonged, further coagulation of fine particles and trapping of slurry droplets are promoted, the flue gas is washedthrough low-temperature washing liquid of the external cooling tower, cooperative removal of the fine particles is achieved, and ultra-clean emission is achieved.

The invention relates to an additive and a preparation method thereof, in particular to a composite additive for synergic removal of various pollutants and a preparation method thereof. In the composite additive for synergic removal of various pollutants and the preparation method thereof, the composite additive comprises the following components in parts by weight: 50 to 65 parts of a composite synergistic agent, 10 to 25 parts of high-efficiency cosolvent, 5 to 15 parts of high-efficiency oxidizing agent, 1 to 5 parts of high-efficiency anti-foaming agent, and 1 to 5 parts of high-efficiency corrosion inhibitor. The composite additive has the advantages of reasonable formula design, capability of removing various pollutants, good stain removal effect, energy-conservation performance and environmental friendliness, low cost, stable product quality, reasonable process design, and simple and easily operable method.

The invention relates to a high-humidity flue gas purifying device, which is used for purifying flue gas with water steam and fine particulate matters. The high-humidity flue gas purifying device comprises a heat exchange tube and a turbulence structure, wherein the flue gas can flow through a surface of the heat exchange tube and the turbulence structure, a refrigerant flows in the heat exchange tube, the water steam in the flue gas can be condensed on the surface of the heat exchange tube and surfaces of the fine particulate matters so as to form a water film and liquid drops, the turbulence structure has a bending part, and the flue gas can flow through the bending part and forms a turbulent flow, so that the liquid drops and the fine particulate matters are collided and agglomerated so as to be acquired and removed.

The invention discloses a high-voltage narrow-pulse discharge and semi-dry process type cooperative pollutant control method and a high-voltage narrow-pulse discharge and semi-dry process type cooperative pollutant control device. The method comprises the following steps: (1) conveying dedusted flue gas to a high-voltage narrow-pulse discharge reactor through a flue gas inlet, and monitoring the concentrations of sulfur dioxide and nitric oxide at the flue gas inlet; (2) setting an energy input value of the high-voltage narrow-pulse discharge reactor according to the concentrations of the sulfur dioxide and the nitric oxide, and oxidizing and degrading the dedusted flue gas in the high-voltage narrow-pulse discharge reactor; (3) conveying the oxidized and degraded flue gas into a semi-dry process desulfurization system, absorbing or adsorbing the flue gas by quick lime or slaked lime, and removing original pollutants and newly-generated pollutants. Through the method and the device, a plurality of pollutants can be cooperatively removed. The method and the device have the advantages of high removal efficiency, flexibility in regulation, simple system, small occupied space and low investment.

The invention relates to a method for synergically removing simple substance mercury and hydrogen sulfide from hot coal gas, which comprises the following steps: charging oxygen into unpurified coal gas with 50-300 DEG C so that the weight of oxygen is 0.8-1.7 times of that of hydrogen sulfide in the coal gas; and introducing the coal gas into an adsorber filled with adsorbent at volume space velocity of 1000-3000h<-1>, and adsorbing for 2.5-3 hours. The invention has the advantages of low cost and no secondary pollution.

The invention discloses a medium/low temperature mesoporous nitrogen oxide and dioxin removal catalyst and a preparation method thereof. According to the catalyst, a mesoporous carbon-silicon composite material is adopted as a carrier, and one or more of vanadium pentoxide, tungsten oxide, cerium oxide and manganese oxide are adopted as active components. The catalyst disclosed by the invention iscapable of effectively achieving synergetic removal of NOx and dioxin within a medium/low temperature range of 180-300 DEG C, and in addition, the catalyst disclosed by the invention has the advantages of being large in specific surface area, ordered in pore height, small in active metal particle size and uniform in active metal particle size distribution.

The invention discloses an MCFB fuel gas purifying device capable of jointly removing various pollutants, which comprises a connecting flue, a primary fuel gas uniform distribution device, a secondary fuel gas uniform distribution device, a Venturi, multistage humidification and activation devices, a dust catcher, an ash circulation device, a draught fan, a fluidized bed reactor, a Venturi diffuser and a composite absorbent preparation device, wherein the lower end of the fluidized bed reactor is sequentially connected with the Venturi diffuser, the Venturi, the secondary fuel gas uniform distribution device, the primary fuel gas uniform distribution device and the connecting fuel; the upper part of the fluidized bed reactor is sequentially connected with the dust catcher and the draught fan; the bottom part of the dust catcher is connected with the Venturi diffuser through the ash circulation device; the multistage humidification and activation devices are arranged in the fluidized bed reactor and the Venturi diffuser; and the composite absorbent preparation device is connected with the Venturi diffuser. The multistage humidification and activation technology of the invention improves the pollutant purification efficiency, solves the problem of adhesion and blockage of materials in a tower, and realizes joint, high-efficiency and low-consumption removal of various pollutants in fuel gases.

The invention discloses a bifunctional catalyst for synergistic purification of nitrogen oxides and volatile organic compounds and a preparation method of the bifunctional catalyst. The catalyst comprises a carrier and an active component, wherein the active component comprises a transition metal oxide. According to the bifunctional catalyst for synergetic purification of nitrogen oxides and volatile organic compounds provided by the invention, the transition metal oxide is used as the active component and is attached to the carrier, so synergetic removal of VOCs and NOx can be realized, highremoval rate and high selectivity of a target product are realized, reaction temperature is reduced, reaction energy consumption is lowered, and production cost is reduced.

The invention provides a flue gas ammonia process desulfurization, denitrification and decarbonization system device and method, the system device comprises a desulfurization and denitrification tower, a decarbonization tower and an ammonia gas escape recovery tower which are connected in sequence along a flue gas flowing direction, so that NOx, SO2 and CO2 in flue gas respectively react with ammonia in absorption liquid to generate ammonium nitrate, ammonium sulfate and ammonium bicarbonate, and the ammonium nitrate, the ammonium sulfate and the ammonium bicarbonate are separated from the absorption liquid. The method can be used for producing ammonium salt compound fertilizer to realize resource utilization; the system device further comprises a crystallization tower, a pyrolyzer and a washing tower, liquid discharged from the liquid outlet of the decarburization tower can be crystallized to obtain ammonium bicarbonate, and then the ammonium bicarbonate is pyrolyzed and washed, so that ammonia gas can be recycled to obtain ammonia water for circulation, and CO2 can be obtained for industrial utilization. A crystallization mother solution generated by crystallization is used as a desulfurization and denitrification absorption solution to be introduced into a desulfurization and denitrification tower for desulfurization and denitrification treatment; the system device and the method provided by the invention not only can realize collaborative removal of various pollutants, but also can realize resource recycling.

The invention discloses a preparation method of a catalyst for synergistic removal of hydrogen sulfide and elemental mercury in garbage gasification pollutants, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps of: selecting an MCM-41 molecular sieve as a raw material, and introducing a hydrophobic group SiH4 to modify the outer surface of the molecular sieve; then removing a template agent by using a certain amount of anhydrous ethanol/HCl; introducing an -SH group to modify the inner surface of the molecular sieve; and then loading a salt solution of lanthanum, cerium and iron in the modified molecular sieve, performing drying, and then conducting high temperature roasting to obtain the multi-metal oxide molecular sieve composite material used for researching the synergistic control of garbage pyrolysis gasification pollutants. The prepared catalyst has good adsorption capacity and regeneration capacity within the temperature range of 150DEG C-200DEG C, H2S and Hg<0> can be efficiently and synergistically removed, and compared with the prior art, multiple pollutants are purified at the same time, and the investment cost and the operation cost can be effectively reduced.

The invention discloses a hydrate-based particulate matter/waste gas synergistic removal system and method. Particulate matters/coking waste gas can be synthesized into a gas hydrate by utilizing R134a, so that particulate matters/coking waste gas synergistic removal can be realized in a pollution-free and low-energy-consumption manner. The system comprises a waste heat recovery device, a hydratefirst-stage dust removal tower, a solid-liquid separation first-stage tower, a hydrate second-stage dust removal tower, a solid-liquid separation second-stage tower, a hydrate decomposition tank, a gas-solid separation tower and a low-temperature fractionation device. According to the system, various harmful substances such as heavy metals and coking waste gas can be removed while particulate matters are removed, compared with an existing particulate matter control and waste gas treatment device, a hydrate method device is greatly simplified, various pollutants can be effectively removed, andenergy conservation and environment protection are achieved.

The invention relates to a method and a device for removing chlorine-containing organic pollutants in flue gas through a combination of ozone catalysis with a wet process. The method comprises the following steps: introducing to-be-treated flue gas and ozone into a reaction unit, and carrying out a catalytic ozonation reaction under the action of a catalyst; allowing oxidized flue gas to enter anabsorption unit to remove soluble pollutants so as to obtain clean flue gas. The invention provides a technology for efficiently, thoroughly and stably degrading chlorine-containing organic pollutantsin flue gas at a low temperature, an ozone coupled catalysis mode is adopted for conversion of the chlorine-containing organic pollutants into HCl, Cl2, CO2 and H2O , and then wet-process alkali liquor absorption is conducted so as to achieve a removal effect of 90% or more.

The invention relates to a method for preparing a synergistic desulfurization and denitrification agent for a cement kiln by recycling hazardous waste and solid waste. The method comprises the following steps: (1) mixing a crushed waste SCR (Selective Catalytic Reduction) denitrification catalyst, electrolytic manganese residues and carbide slag according to a certain mass ratio; (2) carrying out coarse grinding on the mixed material; and (3) adding an auxiliary agent into the material subjected to coarse grinding according to a certain proportion, and performing fine grinding to obtain the desulfurization and denitrification agent. According to the invention, nitrogen oxide and sulfur dioxide in the cement kiln tail gas can be synergistically removed, the emission standard is met, escape ammonia generated by an SNCR system can be eliminated, and increasingly strict ammonia escape supervision requirements are met; dangerous waste and solid waste can be treated while the desulfurization and denitrification cost is reduced, and resource reutilization is performed to create an environment-friendly value. Dust and waste liquid are not additionally generated, the technological process is easy to operate, and equipment and land occupation are not newly added.