30results about How to "Achieve integrated removal" patented technology

The invention discloses a coupling filler autotrophic denitrification biofilter and application and belongs to the technical field of sewage treatment. Pyrrhotite, sulfur and a carbon source are utilized to be mixed and coupled according to certain proportion; then the materials are put into a reactor, and the autotrophic denitrification biofilter can be formed after inoculating biofilm formation;sewage flows through the biofilter, and nitrogen and phosphorus in the water are removed. The biofilter disclosed by the invention has the advantages of simpleness, easiness, practicability and shortbiofilm formation time; when the biofilter is utilized to treat nitrogen and phosphorus containing sewage, hydraulic retention time is only 0.5 to 3 h, and yielding water can meet a requirement; furthermore, the biofilter has the advantages of excellent nitrogen and phosphorus removal effect, low cost and suitability for engineering application.

The invention discloses a chemical agglomeration promoter for removing fire coal fine particulate matters. The chemical agglomeration promoter is prepared from poly-dimethyl-diallyl-ammonium chloride, sorbitan fatty acid ester and water, wherein the mass percent of poly-dimethyl-diallyl-ammonium chloride is 0.001%-0.01%; and the mass percentage of the sorbitan fatty acid ester is 0.001%-0.1%. The invention also discloses an application method of the chemical agglomeration promoter. The chemical agglomeration promoter is capable of effectively promoting fine particles in a gas flue to agglomerate and flocculate to form large particles, and carrying out integral removal on heavy metals in a flue gas; the efficiency of a dust remover for removing fine particulate matters is improved; and the environment problem is effectively relieved.

The invention provides a chemical agglomeration promoter.The chemical agglomeration promoter is prepared from, by mass, 0.001%-0.01% of polyethyleneimine, 0.001%-0.1% of tween-80 and the balance water.The chemical agglomeration promoter is wide in raw material source, low in price, environmentally friendly, simple in chemical composition, simple and fast in synthesis process and free of harm to the environment; the agglomeration effect on fine particulate matter is significant, and the fine particulate matter emission of a coal-fired power plant can be reduced by 60% or above; besides, the chemical agglomeration promoter does not contain acid matter, and thus corrosion to flue equipment can be avoided; moreover, as most toxic heavy metals are gathered on fine particulate matter, heavy metals can be integrally removed with the chemical agglomeration promoter.

The invention provides a fuel and gas-fired boiler oxygen-enriched combustion smoke nearly-zero-emission power generation system. The fuel and gas-fired boiler oxygen-enriched combustion smoke nearly-zero-emission power generation system is composed of a boiler, an air bellow, an air separation device, a burner, a multi-stage heat exchanger, a recirculating fan, an induced draft fan, a dehydration device, an SO2 separation device, a CO2 capturing device, a N2 separator, a NOx reaction device and the like. The concentration of oxygen of secondary air is changed so as to ensure that fuel and gas catch fire in time, burn stably and burn out, the boiler efficiency is improved, and adaptability of the boiler to loads is enhanced. By recycling water steam, SO2, NOx, CO2 and the like brought by burning smoke of fuel and gas, integrated desorption of harmful gas and trace elements in smoke is achieved; meanwhile, the temperature of exhausted smoke is reduced to approach the atmosphere temperature, nearly-zero emission of burning smoke is achieved, the environment is protected, and maximum utilization of resources is also achieved.

The invention relates to a method and device for integrally removing multiple pollutants in tail gas through plant ash seriflux. The method comprises the steps that plant ash seriflux is adopted for independently or jointly oxidize and remove SO2, NOx, Hg, H2S, HCl and HF in tail gas of a combustion or chemical device; tail gas containing SO2, NOx, Hg, H2S, HCl and HF from a boiler or kiln or chemical device is cooled and enters a rotary absorption reactor; soluble or acid gas SO2, NO2, Hg2+, H2S, HCl and HF can be directly washed and absorbed by a solution, and indissolvable gas NO and Hg0 can be absorbed by a solution after being pre-oxidized or oxidized by an additive into NO2, HNO2, HNO3 and Hg2+. According to the method, resource utilization can be achieved for solid waste produced by biomass burning, multiple pollutants can be integrally removed, the purpose of dealing with waste by waste is achieved, secondary pollution is avoided in the whole removal process, and the market development and application prospect is wide.

The invention provides a flue gas system for ultra-clean treatment of cement kiln exhaust gas. The flue gas system includes an oxidative denitration reactor, a CFB absorption tower, a bag filter, a process water system, an absorbent preparation and supply system, a desulfurization ash circulation and conveying system and a chimney. The process water system includes a process water tank, a water pump, a desulfurization spray gun and a digestion spray gun. An absorbent preparation system includes a quick lime bin, a dry digester, a cyclone separator, a buffer bin and a slaked lime bin. The desulfurization ash circulation and conveying system includes an air chute and a bin pump. A dry type coupling desulfurization and denitrification technology is adopted, nitrogen oxides and sulfur oxides in flue gas can be effectively removed, to meet national regulations on ultra-low emission of flue gas pollutants, the flue gas system is free of waste water or secondary pollution, and a by-product can be utilized.

The invention relates to a rotation, confluence and agglomeration tower and a method for agglomeration dedusting by adopting the rotation, confluence and agglomeration tower. The rotation, confluence and agglomeration tower comprises a cylindrical tower body, at least one flow guide pipe used for leading in flue gas is arranged on the lower portion of the tower body, each flow guide pipe is connected with the tower body in a tangent manner, and a flue gas outlet is arranged at the top of the tower body; multiple spray layers used for blowing and jetting agglomeration liquid are arranged in the tower body from bottom to top in sequence, and a rotational flow device used for enabling flue gas to form a turbulence state after passing is arranged at least between the two bottommost spray layers. Good agglomeration and dedusting effect can be achieved, subsequent dedusting burden is alleviated effectively, the subsequent dedusting process can even be cancelled, the national flue gas emission standard is met, and meanwhile equipment investment and running cost are lowered.

The invention provides a desulphurization catalyst, and a preparation method and applications thereof. The desulphurization catalyst is charcoal loaded with active substances, and the active substances comprise iron, cobalt, and molybdenum. According to the preparation method, charcoal is taken as a base material of the desulphurization catalyst, the desulphurization catalyst is invented based ona plurality of sulfides to be removed in gas source, and integrated removing of carbonyl sulfur, mercaptan, and hydrogen sulfide in gas source can be realized under the same technology condition. In desulphurization process using the desulphurization catalyst, hydrolysis is not needed, pre-refining hydrogen sulfide removing is not needed, carbonyl sulfur and hydrogen sulfide are converted into elemental sulfur through one-step catalytic oxidation, mercaptan is oxidized into polysulfides, and the desulphurization catalyst is a green environment-friendly industrial desulphurization catalyst.

The invention discloses a method and a device for removing multi-component pollutants in flue gas based on a supergravity technology, and the method is characterized in that NOx, SO2 and Hg < 0 > pollutants in the flue gas are synchronously removed by using a multi-component absorption liquid under the condition of a supergravity rotating packed bed; and the absorption liquid and the flue gas are in cross-flow contact in a high gravity field, so that the aim of synchronously removing multi-component pollutants in the flue gas is fulfilled. The supergravity rotating packed bed is composed of a shell, a filler for strengthening gas-liquid mass transfer, a filler base and a motor, the filler for strengthening gas-liquid mass transfer is composed of metal wires, the metal wires are arranged in a crossed mode to form a rhombic hole-shaped net, and the area of rhombic holes is 0.6-0.8 cm < 2 >; in the radial direction, the metal wires arranged in the crossed mode are in a corrugated shape. The supergravity rotating packed bed is used as a gas-liquid reaction place, so that the mass transfer process can be enhanced, and the removal efficiency of pollutants is greatly improved; the method has the advantages of being low in cost, good in economic performance, small in occupied area, capable of achieving resource recycling and the like.

The invention provides an active coke combined desulfurization and denitrification system and method based on pre-oxidation. The system comprises a pre-oxidation system arranged on a flue, an absorption system and a chimney, wherein the absorption system and the chimney are sequentially arranged at an outlet of the flue; wherein the pre-oxidation system comprises an H2O2 storage tank and an ultrasonic atomizer which are connected in sequence, and a compressed gas tank connected with an inlet of the ultrasonic atomizer, and an outlet of the ultrasonic atomizer is connected into the flue; the absorption system comprises an absorption tower; wherein the absorption tower adopts a sectional cross-flow flue gas purification adsorption tower, and comprises a gas outlet chamber and a gas inlet chamber which are isolated up and down, and a middle gas chamber communicating with the gas outlet chamber and the gas inlet chamber from the middle; active coke is arranged in the adsorbent layer forming the middle gas chamber, the lower section corresponding to the gas inlet chamber is a desulfurization section, the upper section corresponding to the gas outlet chamber is a denitration section, andan ammonia spraying device is arranged in the middle gas chamber; a gas inlet chamber of the absorption tower is connected with a flue outlet and the gas outlet chamber of the absorption tower is connected with the chimney.

The invention relates to the field of air pollution control, in particular to a preparation method of a denitration and demercuration catalyst, and a catalyst prepared by the method. The preparation method of the denitration and demercuration catalyst comprises the following steps of: putting H40N10O41W12 and NH4VO3 into a solvent, performing stirring and dissolving, then adding TiO2 and Mn(NO3)2 into the obtained mixed solution, and continuously performing stirring to obtain viscous liquid; and sequentially drying, calcining and grinding the viscous liquid to obtain the denitration and demercuration catalyst, wherein the mass ratio of H40N10O41W12 to NH4VO3 to TiO2 is (6-20):(1-18):158, and the mass ratio of Mn(NO3)2 to NH4VO3 is (6-48):1. The problem that the denitration and demercuration efficiency is low due to the fact that the activity temperature window of a traditional commercial vanadium-tungsten-titanium catalyst is too high and seriously deviates from the oxidation conversion temperature and denitration temperature window of Hg<0> is solved.

The invention relates to a pulse charge intensification-filtration catalysis integrated flue gas purification device and a method.The device comprises a gas inlet flue, a flue pulse discharger, a catalysis and filtration integrated reactor and a gas outlet flue; the gas inlet flue is arranged on the lower middle portion of the catalysis and filtration integrated reactor, the flue pulse discharger is arranged in the gas inlet flue, and an ash hopper, a flue gas turbulence device, a catalytic filter pipe, a blowback air pipe and a top catalytic reaction layer are respectively arranged in the catalysis and filtration integrated reactor from bottom to top. The invention further provides a flue gas purification method using the device, and the flue gas purification method comprises the steps of (1) pulse charging, (2) coagulation, (3) filtration catalysis and (4) NH3 decomposition. The flue gas purification device has the advantages that PM2.5, NOx, VOCs, heavy metal mercury and other pollutants can be removed at the same time, filtration resistance is reduced, membrane holes are prevented from being blocked, NH3 escape is effectively controlled, and the ultra-low emission and environment-friendly emission requirements are met.

The invention discloses a flue gas treatment system which comprises a reaction device and a pressurizing device; the reaction device is arranged at the top end of the pressurizing device through a pipeline, the front end of the reaction device is communicated with a heat exchange device, one end of the pressurizing device is communicated with a washing tank, the top end of the washing tank is communicated with an ammonia water tank, and the bottom end of the washing tank is communicated with a compression device; one end of the compression device is communicated with a crystallizing tank; a structural carbon plate is arranged in the reaction device, the structural carbon plate is fixed in the reaction device through a mounting frame structure; heated liquid can be discharged through an inner cylinder for use for other purposes, and gas after heat exchange enters the reaction device for next operation, so that simpleness and convenience are achieved; the heat in the gas can be fully absorbed, energy waste is avoided, and oxidizing gas entering branch pipes reacts with sulfur-containing compounds in flue gas; and meanwhile, chemical adsorption is generated between the structural carbon plate and SO2, oxidation products of NO and HgO are adsorbed at the same time, and the purpose of removing pollutants is achieved.

The invention provides a pre-oxidation and wet catalysis combined desulfurization and denitrification system and method. The pre-oxidation and wet catalysis combined desulfurization and denitrification system comprises a pre-oxidation system arranged on a flue, an absorption system arranged at an outlet of the flue, and a catalyst feeding system and a chimney which are connected with the absorption system respectively, wherein the front oxidation system comprises an H2O2 storage tank and an ultrasonic atomizer which are connected in sequence, and a compressed gas tank connected with an inlet of the ultrasonic atomizer; an outlet of the ultrasonic atomizer is connected into the flue; the absorption system comprises an absorption tower; the absorption tower adopts a wet spraying tower, and aslurry pool for containing alkaline absorption liquid is arranged at the bottom of the absorption tower; a flue gas inlet of the absorption tower is connected with a flue outlet which is connected with a chimney; the catalyst feeding system comprises a catalyst storage tank and a catalyst conveying pump; the catalyst storage tank is connected with the slurry pool through a catalyst conveying pump; and a catalyst for realizing synergistic removal of SO2 and NO2 in the alkaline absorption liquid is contained in the catalyst storage tank.

The invention provides a desilicication and hardness removal integrated device and method, and relates to the technical field of wastewater treatment. According to the device disclosed by the invention, the regulating tank, the hardness removal tank, the silicon removal tank, the coagulation tank, the flocculation tank and the sedimentation tank are integrated, so that high-silicon and high-hardness wastewater is subjected to mud-water separation in the same sedimentation tank after hardness removal and desilicication. The method comprises the following steps: sequentially adding sodium hydroxide, sodium carbonate, a desiliconization agent, a coagulant and a flocculant into an adjusting tank, a hardness removal tank, a silicon removal tank, a coagulation tank and a flocculation tank, staying in each tank for a period of time and then entering a sedimentation tank, obtaining clarified desiliconized hardness-removed wastewater at an outlet at the upper part of the sedimentation tank, and obtaining sludge containing a hardness-removed product and a desiliconized product at the bottom of the sedimentation tank. According to the invention, the integration degree is high, the number of coagulation tanks, flocculation tanks and sedimentation tanks is reduced, the process flow is simplified, the removal rates of hardness and silicon in the high-silicon and high-hardness wastewater respectively reach 95% and 90%, the requirements of downstream inflow water quality are met, and the method is a rapid and efficient desilicication and hardness removal method and is suitable for industrial application.

The invention discloses a mercury-sulfur-carbon synergetic integrated removal dust removal system, which comprises an absorbent injection system, a dust removal system, an ash conveying system and a magnetic adsorbent recovery and reuse system, a plurality of dry powder spray guns are arranged on the absorbent injection system, the dry powder spray guns are arranged in an inlet flue of the dust removal system, and the magnetic adsorbent recovery and reuse system is arranged on the dust removal system. The ash conveying system comprises an ash conveying mechanism and a magnetic separation device, an ash discharge port of the dust removal system is connected with an inlet of the ash conveying mechanism, the magnetic separation device is used for magnetically separating out a magnetic adsorbent in fly ash conveyed by the ash conveying mechanism, and an outlet of the magnetic separation device is connected with an inlet of the magnetic adsorbent recycling system. And an outlet of the magnetic adsorbent recycling system is connected to the absorbent injection system. The system can realize integrated removal of dust, sulfur, mercury and carbon, and is small in occupied area, low in cost and more suitable for large-scale engineering popularization.