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

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 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 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 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).