31results about How to "Improve out-of-stock efficiency" patented technology

The invention provides a flue gas denitrification agent and a preparation method thereof, which comprises the following raw materials according to weight percentage: 5-10% of urea, 5-10% of ganoderma acid, 1-3% of carboxymethyl cellulose sodium, pyrolusite Powder 20-40%, the balance is water. Preparation method: Weigh urea, ganoderma acid, sodium carboxymethylcellulose, pyrolusite powder and water according to the ratio, and then mix and stir until viscous material is formed. The denitrification agent has high desulfurization and denitrification efficiency and long operation time.

The invention belongs to the technical field of environment-friendly construction and in particular relates to a factory flue gas desulfurization and denitrification device for the environment-friendly construction. Aiming at the problems that the design structure is simple, the denitrification efficiency is low and the desulfurization efficiency is low, the invention provides the following scheme: the factory flue gas desulfurization and denitrification device comprises a denitrification chamber, wherein a gas inlet is formed in the middle position of a bottom outer wall of the denitrification chamber; the top of a peripheral inner wall of the gas inlet is connected with a second filtering screen plate through a fastening bolt; the bottoms of inner walls at four sides of the denitrification chamber are connected with a transition pipe through fastening bolts; ammonia gas spraying nozzles, which are distributed at an equal distance, are connected with the outer wall at one side, far away from the denitrification chamber, of the transition pipe through fastening bolts. According to the factory flue gas desulfurization and denitrification device for the environment-friendly construction, the contact efficiency between ammonia gas and flue gas is improved, a catalyst is sufficiently utilized and the denitrification efficiency is improved; the ammonia gas which does not react completely is effectively filtered and subsequent equipment is prevented from being damaged by the ammonia gas; a condition that the deposition concentration of Ca(OH)2 slurry is not uniform is effectivelyavoided; sufficient mixing and contact of ammonia gas and the flue gas is ensured and the desulfurization efficiency is improved.

A desulfurization and denitrification system and method for sintering flue gas, including a mixing and granulating device, a main smoke exhaust pipeline, an electrostatic precipitator, a ring cooler, a bypass valve, an activated carbon absorption tower, a bag filter, and an activated carbon storage bin and chimneys. Add an induced draft fan, heat recovery cover and hot air pipe above the ring cooler, and add a urea solution tank on the mixing and granulating device. Mix the urea solution into the sintering mixture at a ratio of 0.5 to 3%, and the NH produced by thermal decomposition of urea 3 and SO in the sintering flue gas 2 The reaction produces ammonium sulfate, and the excess NH 3 with SO 2 On the contrary, it is discharged along the main exhaust pipe; the induced draft fan transfers the recovered waste heat of the annular cooler into the pipeline between the electrostatic precipitator and the activated carbon absorption tower through the hot air pipe, and heats the sintering flue gas to above 150°C to accelerate the NH 3 Reaction efficiency with NOx in sintering flue gas. The invention can greatly improve the destocking efficiency, realize simultaneous desulfurization and denitrification of sintering flue gas, and make the concentration of nitrogen oxides in the outlet flue gas less than 300mg / m 3 .

The invention provides a doped Hollandite type titanium oxide ammonia catalytic selective reduction nitrogen oxide (NH3-SCR) denitrified monolithic catalyst, and relates to the environmentally-friendly technology in the field of catalytic science and energy saving. The catalyst is characterized in that: a honeycomb cordierite ceramic material serving as a base material and gamma-Al2O3 serving as a carrier carry Anatase crystal TiO2 powder at first, and then carry Hollandite structured titanium oxide (V-HOL) of an active component framework vanadium ion (V5+), wherein the contents of gamma-Al2O3 and TiO2 are 5-15 weight percent and 5-10 weight percent respectively; the V-HOL is 5-20 weight percent; and the molar ratio of V / Ti is between 0 and 0.20. According to the monolithic catalyst, at a broad temperature window of between 100 and 450 DEG C, the conversion rate to NOx by using NH3 as a reducing agent is more than 85 percent, and the selectivity to N2 is more than 95 percent. The catalyst is suitable for controlling emission of nitric oxides.

The invention discloses a novel cathode and anode electro-catalysis synergistic flue gas denitration method, which belongs to the technical field of atmospheric treatment. According to the method disclosed by the invention, NO in the flue gas is oxidized into high-valence NOx which is easily dissolved in a water body by utilizing active matters generated by anodic oxidation; NOx absorbed by the water phase is converted into nitrite and nitrate, meanwhile, dissolved nitrate nitrogen can be converted into nitrogen or ammonium on the cathode through the catalytic reduction effect, and the generated ammonium can be finally oxidized into nitrogen by hypochlorous acid generated by anode electrolysis. According to the system, the solution is lifted to the top of the reaction device through the lifting pump and forms spray through the spraying device, so that the contact time and the contact area of NO and the solution are further increased, and the treatment efficiency is improved.

The invention discloses temperature adjustable three-way pipe boiler SCR denitration equipment, which comprises a flue gas channel, wherein the surface of the flue gas channel is provided with a gas inlet pipe, a three-way pipe is installed on the top end of the gas inlet pipe, one end of the three-way pipe is connected to a steam heater through a pipeline, and one side of the steam heater is provided with an electromagnetic valve. According to the present invention, one side of the flue gas channel is provided with the steam heater through the gas inlet pipe, and when the temperature of the gas in the flue gas channel does not achieve a specified temperature value, the electromagnetic valve on one side of the steam heater is opened to allow the flue gas to enter the steam heater, such that the flue gas is treated by the steam heater to increase the temperature of the flue gas, and the temperature of the flue gas is increased to the temperature range required for the denitration so asto improve the flue gas denitration efficiency; and the first flue gas heat exchanger, the second flue gas heat exchanger and the third flue gas heat exchanger are arranged on one end of the steam heater, such that the flue gas denitration efficiency can be accelerated when the flue gas temperature is higher than a specified temperature region.

The invention discloses a porous ammonia spraying device used for a W-flame boiler high-temperature reduction zone and relates to porous ammonia spraying devices. The problems that an existing turbulent burner W-flame boiler is high in NOx emission and low in denitration efficiency are solved. The porous ammonia spraying devices are hollow spheres; a plurality of swinging exhaust air spraying nozzles are sequentially arranged on the upper portion of the front side wall of a lower hearth in the horizontal direction; a plurality of swinging graded air spraying nozzles are sequentially arranged in the middle of the front side wall of the lower hearth in the horizontal direction; a plurality of swinging first-grade overfire air spraying nozzles are arranged on a rear boiler arch in the horizontal direction; a plurality of swinging second-grade overfire air spraying nozzles are sequentially arranged in the middle of an upper hearth in the circumferential direction; the multiple porous ammonia spraying devices are sequentially arranged on the lower portion of the upper hearth in the circumferential direction and are the hollow spheres; and a plurality of round holes are machined in the positions, below the center faces K of the porous ammonia spraying devices, of the spheres, so that multi-azimuth and multi-angle direct ammonia spraying is formed. The porous ammonia spraying device is used for ammonia spraying on the W-flame boiler high-temperature reduction zone.

The invention relates to a titanium oxide-loaded vanadium-molybdenum composite oxide high-efficiency denitrification monolithic catalyst and a preparation method thereof, and relates to a control technology for catalytic selective reduction of nitrogen oxides (NOx) in the fields of catalysis, environmental protection and energy saving. It is characterized in that the honeycomb cordierite ceramic material is used as the matrix, the γ-Al2O3 is used as the first carrier, the Anatase crystal form TiO2 is used as the second carrier, and the active component includes V2O5-MoO3 composite oxide as the active component. Wherein the contents of γ-Al2O3 and TiO2 are respectively 5-15wt% and 5-10wt%, V2O5-MoO3 is 1-10wt%, and the molar ratio of V / Mo is between 0-0.20. In the wide temperature window of 80-450 DEG C, the monolithic catalyst of the present invention uses NH3 as the reducing agent to convert NOx to not less than 85%, and the selectivity to N2 is greater than 90%.

The invention relates to an integrated flue gas desulfurization and denitrification agent and an application method thereof. The invention is characterized in that the flue gas desulfurization and denitrification agent comprises the following ingredients: a desulfurizing agent, an iron-based denitration catalyst, an activator and a suspending agent. By using an alkaline substance as a desulfurizing agent, using the desulfurization product sulfite as a reducing agent and using the iron-based denitration catalyst as an active reaction factor, simultaneous removal of sulfur dioxide and nitrogen oxide in flue gas is realized in a the gas-liquid-solid three-phase homogenization suspension state, wherein NOx is reduced into nitrogen; and a reacted absorption liquid is activated by the use of an acid solution and a suspending agent is supplemented and then the mixture is sent by a circulating pump into a reaction tower for recycling. The method is simple to operate. By the method, desulphurization efficiency is 99% and above, denitration efficiency is 90% and above, and the desulfurization and denitrification effect is good. The materials are recycled, thus greatly reducing the operating cost of desulfurization and denitrification. The product has obvious economic advantages and can be used for treatment of flue gas or tail gas of various industrial boilers and industrial furnaces.

Relating to the catalytic science and environmental protection technology in the field of energy saving, the invention provides a doped todorokite-type manganese oxide denitration integral catalyst for selective catalytic reduction of NOx by ammonia (NH3-SCR). The catalyst is characterized by taking honeycomb cordierite ceramic material as the matrix and gamma-A1203 as the carrier. The ceramic material is firstly loaded with anatase crystal TiO2 powder, and then loaded with the active component of skeleton vanadium ion (V<5+>) todorokite-structured manganese oxide (V-TMO). Wherein, the contents of gamma-A1203 and TiO2 are 5-15wt% and 5-10wt% respectively, V-TMO accounts for 5-20wt%, and the mol ratio of V to Mn ranges from 0-0.20. The integral catalyst of the invention, at a broad temperature window ranging from 100-450DEG C, can transform NOx at a rate of more than 85% with NH3 as the reducing agent, and has a selectivity of over 95% for N2. The integral catalyst provided in the invention is suitable for controlling the discharge of nitrogen oxides.

The invention discloses a modified urea denitration agent which is prepared from the following three parts: (1) 100.0 parts by mass of urea; (2) 0.5-10.0 parts by mass of high polymers such as polyethylene glycol, polyacrylic acid, sodium polyacrylate and polyvinyl alcohol; and (3) 0.1-10.0 parts by mass of a modified component. The modified component is a silicon dioxide microcapsule loading titanyl sulfate or titanyl sulfate and zinc sulfate or manganese sulfate and / or aluminum sulfate. The denitration rate of the denitration agent at 750-1050 DEG C can reach 83.2%-99.0%. The compound denitration agent is simple in preparation method, and can be widely applied to high temperature gas denitration in a thermal power plant, a waste incineration plant, etc.

The invention discloses a novel cathode-anode electrocatalysis cooperative flue gas denitrification method, which belongs to the technical field of atmospheric treatment. The method of the present invention utilizes the active matter produced by anodic oxidation to oxidize NO in the flue gas into high-valence NOx that is easily soluble in water, and the NOx absorbed by the water phase is converted into nitrite and nitrate, and the dissolved nitrate nitrogen can be It is converted to nitrogen or ammonium by catalytic reduction on the cathode, and the ammonium produced can be finally oxidized to nitrogen by the hypochlorous acid generated by electrolysis at the anode. The system uses a lifting pump to lift the solution to the top of the reaction device, and forms a spray through the spray device, which further increases the contact time and contact area between NO and the solution, and improves the treatment efficiency.

The invention belongs to the field of biomass fluidized bed combustion, and specifically discloses a biomass fluidized bed direct combustion system and a denitrification method thereof, which includes a biomass fluidized bed boiler, a cyclone separator, a feeding reactor, and a waste heat boiler , flue gas purification device and air distribution device, the lower end of the biomass fluidized bed boiler is provided with a first feeder and slag discharge pipe, and the upper side is provided with a denitrification device; the cyclone separator is arranged at the upper end of the biomass fluidized bed boiler, and It is connected with the feeding reactor; the upper end of the feeding reactor is provided with an exhaust pipe, and the lower end is provided with a feeding pipe. Both the exhaust pipe and the feeding pipe are connected with the biomass fluidized bed boiler, and the feeding reactor is also provided with The second feeder; one end of the waste heat boiler is connected to the cyclone separator, and the other end is connected to the flue gas purification device; the air distribution device is used to supply air to the biomass fluidized bed boiler. The invention optimizes the problem of low denitrification efficiency in the traditional biomass combustion boiler, has high denitrification efficiency, and reduces operating costs at the same time.

The invention relates to an intelligent air supply control method, equipment and storage medium. The method includes: analyzing historical data and obtaining a fan output baseline function through actual load dynamic tests; according to the actual load of coal-fired thermal power units and the fan output baseline function Obtain the initial value of the total output of the blower, and set the initial output value of each blower according to the initial value of the total output of the blower, so that each blower operates according to the initial output value; according to the oxygen amount calibration result of the oxygen amount PID calibrator, obtain the blower's The correction range of the initial value of the total output, and correct the initial output value of each blower according to the correction range of the initial value of the total output, so that each blower operates according to the corrected output value; when the actual load of the coal-fired thermal power unit changes , adjust the output value of each blower according to the current oxygen amount. The invention solves the problem of inaccurate measurement of air volume due to the air supply control strategy of the coal-fired thermal power unit, which is unsafe and uneconomical.

The invention discloses an efficient denitrified integral catalyst of a stationary source, which relates to a control technique of catalytic selective reducing nitric oxides (NOx) in the fields of catalyzation, environmental protection and energy saving and is characterized in that honeycomb cordierite ceramics are used as matrixes; gamma-Al2O3 is used as a first carrier; anatase crystal TiO2 is used as a second carrier; and a manganese oxide molecular sieve (V-OMS) of framework vanadium ions (V<5+>) is used as an active component, wherein contents of the gamma-Al2O3 and the TiO2 are respectively 5wt% to 15wt% and 5wt% to 15wt%; the content of the V-OMS is 5wt% to 20wt%; and the molar ratio of V to Mn is between 0 and 0.20. On a window with wide temperature of 80 DEG C to 450 DEG C, the conversion ratio of the NOx of the integral catalyst of the invention by using NH3 as a reducing agent is not less than 85%; and the selectivity of N2 is larger than 90%. The integral catalyst is suitable for controlling the discharge of nitrogen oxides of the stationary source (boiler).