113results about How to "Good desulfurization and denitrification effect" patented technology

The invention discloses a desulphurization and denitration catalyst. The catalyst comprises the following components by mass percentage: 4 to 18 percent of CuO, 80 to 95 percent of gamma-Al2O3, and 1 to 2 percent of promoter. A method for preparing the catalyst comprises the following steps: (1) adding aluminum isopropoxide into distilled water, stirring the mixture, adding a nitric acid solution into the mixture dropwise, and carrying out the evaporation in the air to obtain a boehmite sol; (2) adding the promoter into a copper nitrate solution, then adding the mixture into the boehmite sol, then adding the nitric acid solution dropwise, stirring the mixed solution for ageing, and aggregating the mixed solution into a semi-gel; and (3) adding the semi-gel dropwise into a gel pool containing ammonia water and liquid paraffin through a dropper, and obtaining the catalyst after ageing, drying and baking. The prepared catalyst can be used for synchronous desulphurization and denitration, and can be regenerated and used cyclically with low raw material cost. As the byproducts can be reutilized, the catalyst brings about no secondary pollution.

The invention relates to a method for simultaneously removing sulfur oxides and nitric oxides in flue gas, which belongs to the technical field of flue gas purification. The method comprises the following steps: spraying water or steam into a flue before flue gas from burning equipment enters a fluidized bed reactor through the flue and controlling the temperature of the flue gas within a range of 90-200 DEG C, wherein the flue gas in the flue contains gas components of O2, H2O, SO2 and NOx; directly jetting CaO and/or Ca(OH)2 into the flue to oxidize NO; and controlling the temperature of the fluidized bed reactor to be between 50 DEG C and 90 DEG C for the flue gas to desulfurize and denitrate in the fluidized bed reactor. In the method, desulfurization and denitration can be simultaneously realized in the same system by adjusting processing steps and controlling a reaction condition. When a molar ratio Ca/(S+0.5N) of calcium to sulfur to nitrogen is 1.3, the removal rate of the SO2 can reach over 85 percent, and the removal rate of the NO can reach over 60 percent.

The invention provides a high-temperature and low-temperature gas-phase composite desulfurization and denitration method. The high-temperature and low-temperature gas-phase composite desulfurization and denitration method comprises the following steps: a) introducing flue gas; b) uniformly distributing the flue gas; c) carrying out flue gas turbulence; enabling the flue gas to penetrate through awater layer concentrated at the bottom of a catalytic contactor to realize sufficient contact between the water layer and a spraying solution; d) carrying out desulfurization and denitration treatment, wherein the spraying solution is a water solution containing NaClO and NaOH; e) removing nitric acid and nitrite in water and mixing the water with an ammonium chloride solution. The desulfurizationand denitration method provided by the invention comprises the following steps: firstly, absorbing NO, SO2 and less NO2 in the flue gas by utilizing the water solution containing the NaClO and the NaOH; then transforming the nitric acid and nitrite ions in the water into nitrogen gas through the ammonium chloride solution to be released. According to the high-temperature and low-temperature gas-phase composite desulfurization and denitration method, very good desulfurization and denitration effects can be realized under a high-temperature or low-temperature condition; the desulfurization anddenitration efficiency can reach 95 percent or more; the method has remarkable beneficial effects and is suitable for being popularized and applied.

The invention discloses an ammonia desulphurization and denitrification process for flue gas by synchronization of complexing absorption and electrolytic regeneration and solves the problem of low absorption liquid regeneration efficiency in an existing synchronous ammonia desulphurization and denitrification process for the flue gas. The technical scheme includes that the flue gas is pressurized and then fed into a concentration tower to realize contact reaction with concentration liquid in the tower, the flue gas discharged from the concentration tower is fed into an absorption tower to realize contact reaction with cyclic absorption liquid in the absorption tower, the concentration liquid at the bottom of the concentration tower is subjected to deferrization through a first electrolytic reactor after reaction and then fed into an ammonium sulfate crystallization system, the absorption liquid at the bottom of the absorption tower is regenerated and then fed back to the upper portion of the absorption tower to serve as the cyclic absorption liquid, the concentration liquid enters an anode chamber of a reaction unit of the first electrolytic reactor to realize oxidation reaction and then enters a cathode chamber to realize a reduction reaction, and an electrolytic solution is discharged through a short outlet connection pipe of the reactor after reaction and fed into the ammonium sulfate crystallization system. The ammonia desulphurization and denitrification process for the flue gas by synchronization of complexing absorption and electrolytic regeneration has the advantages of simplicity, low investment cost and operation cost, high conversion efficiency and effectiveness in deferrization, desulphurization and denitrification.

The invention discloses a denitration-demercuration integrated device and method used in circulating fluidized bed desulfurization of sintering flue gas, belonging to the technical field of desulfurization and denitration of sintering flue gas. The device comprises a CFB reactor, an industrial water tank, a digestion tank, a denitration reduction absorbent tank, a cloth bag dust removal system, aflue gas monitoring system and an electrostatic dust removal system. The method comprises the following steps that firstly, a denitration oxidant component A of is sprayed into a flue located betweenan electrostatic dust collector and a CFB reactor, and can rapidly oxidize a part of NO in flue gas into a high-valence-state multi-nitrogen-oxide mixture easy to absorb by water vapor, and then the high-valence-state multi-nitrogen-oxide mixture enters the CFB reactor; and a denitration reduction absorbent component B is sprayed into the CFB reactor, lime is sprayed into the CFB reactor, and desulfurized and denitrated flue gas undergoes dust removal and is then discharged after being detected by the flue gas monitoring system. The method disclosed by the invention is simple, environment-friendly, circular and pollution-free, and has low operation cost and remarkable economic and environmental benefits.

A flue gas comprehensive cyclic treatment method for two series of sintering systems includes steps: 1) sintering, to be more specific, sintering raw materials in sintering machineS to generate sintering gas; 2) cooling, namely cooling the sintered raw materials in circular cooling machineS; 3) flue gas treatment, to be more specific, after the sintering gas passes through dedusting deviceS, entering a desulfurization and denitrification system to realize treatment, wherein a sintering system A is an activated carbon desulfurization and denitrification system, a system B is a wet desulfurization and denitrification system, and sintering flue gas of the sintering system A is fed into the sintering machine of the sintering system A and the sintering machine of the sintering system B throughtwo cyclic gas branch pipes respectively. In the dry desulfurization and denitrification system, the sulfide concentration is increased while the nitride concentration is reduced, and dry desulfurization and denitrification can be benefited; in the wet desulfurization and denitrification system, the sulfide concentration and the nitride concentration are reduced, and wet desulfurization and denitrification can be benefited. Therefore, energy consumption in industrial production is reduced, and production cost is saved.

The invention relates to a flue gas desulfurization and denitrification method. Preparation raw materials are selected and a removal method comprises the following steps of S1, selecting materials: selecting distilled water and boiling the water; S2, selecting; selecting an FeCl3 solution; S3, dropwise adding the FeCl3 solution into the boiled water; continually boiling until reddish brown liquidis generated, so as to obtain a desulfurization agent; S4, cooling flue gas to 50 to 100 DEG C through a heat exchanger and introducing the flue gas into the obtained desulfurization agent; S5, introducing the flue gas into the obtained denitrification agent and carrying out denitrification reaction; S6, carrying out ultraviolet irradiation and electron beam irradiation on primary desulfurizationand denitrification flue gas at the same time, so as to obtain secondary desulfurization and denitrification flue gas; S7, carrying out water spraying treatment; S8, discharging denitrified coke ovenflue gas through an induced draft fan. By adopting two times of the desulfurization and denitrification method, the removal efficiency is high and pollutants including SO2, NOx and the like in the flue gas can be removed, so that pollutions to the air are reduced, damage to humans is reduced and the humans are healthier.

The invention discloses a deodorization composition used for processing breeding dung and an application thereof. The deodorization composition is prepared from, by mass, 40%-55% of activated biomass supercritical liquidation residue, 15%-25% of activated carbon, 10%-15% of bran and 10%-15% of organic calcium. The deodorization composition can reduce the production of repugnant substances in an animal dung compost process, and the composition is suitable for usage and popularization in organic fertilizer factories and all large farms.

The invention discloses a desulfurization and low-temperature denitration system for clean flue gas emission. The desulfurization and low-temperature denitration system comprises a desulfurization system, a denitration system, a flue gas washing system and a flue gas emission system, wherein the desulfurization system is composed of a desulfurizing absorption tower, a desulfurizing solution preparation system and a desulfurizing solution circulating system; the denitration system is composed of a denitrating absorption tower, an ozone generator and a denitrating solution circulating system; the flue gas washing system comprises a scrubbing tower and a scrubbing water supply system; the flue gas emission system is a chimney; and flue gas from a boiler is sequentially subjected to desulfurization, low-temperature denitration and flue gas scrubbing. The desulfurization and low-temperature denitration system disclosed by the invention has excellent desulfurization, denitration and dust removal effects and can eliminate a 'white smoke' problem caused by the flue gas. Moreover, the system disclosed by the invention solves the problem of secondary pollution in the desulfurization and denitration process and offers help for reducing and eliminating haze.

The invention discloses a device and method for simultaneous desulfurization and denitrification of flue gas under a synergistic effect of vacuum ultraviolet and available chlorine. The method and thedevice are characterized in that an ultraviolet source is adopted for simultaneous radiation of VUV and UVC, and oxygen source gas is subjected to photolysis through VUV waveband photons to generateO3 and ROS; then, the generated O3 and ROS are guided into flue gas and returns near to the ultraviolet source along with the flue gas to take UVC irradiation; an available chlorine oxidation absorbent is mixed in the flue gas, and O3, ROS and the available chlorine oxidation absorbent synergistically play a role in oxidation of NOx and SOx in the flue gas; photochemical reaction of O3 and an available chlorine component in the available chlorine oxidation absorbent is excited through UVC waveband photons to generate more active free radicals to further have reaction with NOx and SOx in the flue gas, so that NO and SO2 in the flue gas can be oxidized into nitrate and sulfate to realize simultaneous desulfurization and denitrification of flue gas.

The invention discloses a flue gas pollutant cooperation removal technology based on electrolysis. The problems are solved that technologies are complex, the pollutant treatment efficiency is low, investment and operation cost are high in present flue gas treatment. The technology comprises steps: flue gas is pressurized and sent to a concentration tower, a reaction is carried out, the flue gas going out from the concentration tower is sent to an absorbing tower and contacts and reacts with a circulating absorption solution sprayed from a spray layer at the upper part of the tower in a reverse manner, and the flue gas after reaction is discharged from the top of the absorbing tower; part of the concentrate at the tower bottom of the concentration tower is subjected to iron removal, then is sent to a ammonium sulfate crystallization system, the flue gas goes into the absorbing tower from a flue gas inlet at the middle part of the absorbing tower, goes through at least one absorbing and electrochemical reaction layer arranged at the upper part of the tower firstly, then contacts and reacts with a circulating absorption solution in a reverse manner, then goes through a filler layer and a spraying layer, and is discharged from a flue gas outlet. The technology is simple, the reaction efficiency is high, the operation and investment cost are low, the system land occupation area is small, and the technology is especially suitable for cooperation treatment of multiple pollutants of sulfur dioxide, nitrogen oxides, fine particles, dioxin and the like.

The invention provides a dust removal, desulfurization and denitrification integrated tower which sequentially comprises a water film dust removing layer, a denitration layer, a desulfuration layer and a steam-water separation layer from bottom to top; the positions of the denitration layer and the desulfuration layer can be exchanged. The invention also provides a dust removal, desulfurization and denitrification integrated system which comprises an air inlet device, a purification device and a recovery device, wherein the air inlet device is connected with the purification device; the purification device is connected with the recovery device. After the dust removal, desulfurization and denitrification integrated tower and the dust removal, desulfurization and denitrification integrated system are used for treating waste material, the pollution is reduced, the reaction raw material is saved, the device is easy to clean, the service life is prolonged, and the production cost is lowered.

The invention belongs to the field of flue gas processing, and especially relates to a dry-method desulphurization denitration integrated treatment method. The dry-method desulphurization denitration integrated treatment method comprises following steps: flue gas is delivered through a deduster for dedusting, and then an atomizer is used for atomization and humidification; after humidification, obtained flue gas is delivered into a desulphurization device containing absorption blocks for 0.5 to 2.5s of treatment so as to achieve complete absorption of SO2; after desulphurization, flue gas is delivered into a photocatalysis oxidation device so as to degrade NOx in flue gas into N2 and O2 and generate a part of O3; a part of NO is converted into NO2 via oxidation with O3 generated via photocatalysis; after photocatalysis decomposition, flue gas is delivered into a denitration device containing absorption blocks, wherein NO2 is absorbed by the absorption blocks completely, and left trace amount of NOx (the concentration of the NOx is 100mg/m<3> or lower), NO2, and O2 are discharged through a chimney. According to the dry-method desulphurization denitration integrated treatment method, low temperature photocatalysis is adopted to reduce waste flue gas treatment cost, and realize high efficiency desulphurization denitration.

The invention provides a flue gas treatment method, and belongs to the technical field of environmental protection equipment. The flue gas treatment method comprises the following treatment steps that: discharged flue gas is dedusted by a deduster and then enters a main flue, and the flue gas accounting for 3-7% of the volume of the dedusted flue gas is drawn out and is cooled and dehumidified tohave a temperature of 60-80 DEG C and a relative humidity of less than 3.5%, and then the flue gas preheats sodium bicarbonate in a grinding device; the preheated sodium bicarbonate powder is heated to 120-200 DEG C and then sprayed directly into the main flue to have a chemical reaction with nitrogen oxides and sulfur oxides in the flue gas; and the flue gas is discharged after washing. The fluegas treatment method can well solve the problems of desulfurization and denitration of low-temperature flue gas, is low in energy consumption, low in equipment cost and wide in application range, andcan not only realize the treatment of low-temperature flue gas, but also can adapt to the treatment of high-temperature flue gas, and sodium bicarbonate powder is directly mixed with the flue gas, sothat compared with spraying a solution, the requirement on equipment is low, and the reaction efficiency is high.

The invention provides a desulfurization and denitrification device and method. The desulfurization and denitrification device comprises a to-be-treated gas inlet (101), a fresh absorbent inlet (102),an absorption reactor (2), an absorption and regeneration mixed reactor (3), an alkali liquor tank (4) and a solid-liquid separator (5). By means of the desulfurization and denitrification device andmethod, continuous desulfurization and denitrification of to-be-treated gas can be realized, solid particles in the to-be-treated gas can be removed, the treatment efficiency is high, content of NOxand SOx in discharged gas is low, no dioxin is produced, and the national environmental protection standard can be met.

The invention discloses a nano composite type coal-saving desulfurization and denitrification additive and belongs to the environmental-friendly coal-saving field. The coal-saving desulfurization and denitrification additive is water dispersible solution and consists of solute and a solvent, wherein the solute comprises the following components in parts by weight: 15-45 parts of nano titanium dioxide, 2-8 parts of rare earth lanthanum and high-alumina bauxite, 1-3 parts of triethanolamine acetate, 25-35 parts of nitrate and 5-10 parts of active carbon fiber; the solvent is deionized water, and the mass percentage concentration of the coal-saving desulfurization and denitrification additive is 10-35%. The nano composite type coal-saving desulfurization and denitrification additive disclosed by the invention has the beneficial effects that the burning condition of coal can be effectively improved, the coal consumption can be reduced, and the emission of main pollutants such as SO2 and NOx is reduced, and also has the advantages of stable performance, convenience in storage, good coal-saving effect, obvious emission reduction, simple use and fast investment return and the like.

A combined desulfurization and denitration method for a novel dry-process cement production line is disclosed. The method includes adding a raw material modifier and a liquid desulfurization and denitration agent which are two parts into the cement production line. The raw material modifier is added at a raw material elevator, and the liquid desulfurization and denitration agent is added at a windpipe among cyclone preheaters C1-C3. The raw material modifier includes 10-98% of a SO2 absorbent, 0.01-30% of an active component promoting SO2 absorption, 0.01-30% of an active component promotinglimestone decomposition, and 0.01-30% of a denitration catalyst adopting clay as a carrier. The liquid desulfurization and denitration agent includes 0.1-25% of ammonia water, 0.1-40% of a urea solution, or a solution mixture of both. The method has technical advantages of good desulfurization and denitration effects, low cost and no secondary pollution.