9results about How to "Improve denitrification performance" patented technology

The denitration and dust removal integrated biomass grate boiler comprises a second flue, a third flue and a fourth flue which are sequentially connected with an outlet of a hearth, the lower end of the second flue is communicated with the lower end of the third flue, and the upper end of the third flue is connected with the upper end of the fourth flue through a furnace top turning flue. A first platen superheater is arranged at the upper part of the hearth, a second platen superheater is arranged in the second flue, a coiled pipe superheater is arranged in the third flue, and denitration equipment, an economizer and a tail heating surface are sequentially arranged in the fourth flue according to the flowing direction of flue gas; dust removal equipment is arranged in the furnace top turning flue, and the dust removal equipment and denitration equipment are supported on a boiler body steel frame. The dust removal equipment and the denitration equipment are also arranged in the range of the boiler body, so that compared with the prior art, the lengths of the inlet flue and the outlet flue are greatly shortened, the heat dissipation loss is reduced, the boiler efficiency is improved, and the dust removal and denitration effects can be improved; and the floor area is small, and the construction cost is low.

The utility model relates to the technical field of flue gas treatment, in particular to a coking flue gas denitration device, and aims to solve the technical problems that in the prior art, flue gas is sprayed from the upper part to the lower part, the flue gas and an absorbent are not completely reacted and then are exhausted, and the denitration effect is poor. A long hole is formed in the partition plate on one side of the gap, a plurality of spray heads are evenly distributed on the surfaces of the partition plates on the upper side and the lower side of the long hole, each long hole is communicated with a liquid inlet pipe through a corresponding branch pipe, the top wall of the treatment chamber is communicated with an exhaust pipe, waste gas is injected through the lower portion of the treatment chamber, and the flue gas advancing path is prolonged through the partition plates arranged in a staggered mode. A plurality of nozzles are arranged at the upper part and the lower part of the partition plate for spraying to form a plurality of dead-angle-free liquid curtains, flue gas fully reacts with an absorbent through the plurality of liquid curtains, and the absorbent covers the upper surface of the partition plate and downwards flows, so that the contact area between the absorbent and the flue gas is increased, and the denitration effect is greatly improved.

The utility model discloses a boiler denitration agent feeding mechanism, which belongs to the technical field of flue gas denitration, and adopts the technical scheme that the boiler denitration agent feeding mechanism comprises a denitration tower, a controller is arranged on the front side of the surface of the denitration tower, a rotating assembly is arranged in the denitration tower, and the rotating assembly comprises a first bevel gear; a feeding assembly is fixedly connected to the interior of the first bevel gear, and by arranging the feeding assembly, a medicament sprayed from an atomizing nozzle can be annularly and uniformly distributed in the denitration tower, and the uniformly sprayed medicament can be in full contact with nitrogen oxide in flue gas, so that the condition that the concentration of the medicament in a local area is too low or too high is avoided; according to the denitration tower, the rotating assembly is arranged, so that the medicament sprayed from the atomizing spray head can be uniformly sprayed in the denitration tower in a 360-degree annular manner, the medicament can uniformly cover the internal space of the denitration tower, nitrogen oxides at all positions in the denitration tower can be fully contacted with the medicament and react with the medicament, and the denitration effect is further improved.

The utility model discloses an electric calcined coal waste gas denitration device in the technical field of flue gas treatment equipment, which comprises a preheater, a gas inlet is connected above the preheater, a connecting pipe is arranged on one side of the preheater, a pipeline is arranged at one end of the connecting pipe, a main water pipe is arranged on the outer side of the pipeline, a through pipe is arranged above the pipeline, and a gas outlet is formed in the other end of the pipeline. A tower body is arranged at one end of the through pipe, a fan is arranged at the bottom of the tower body, an air outlet is formed in the bottom of the fan, a nozzle pipe is arranged on the inner side of the pipeline, and a first mixer layer and a second mixer layer are arranged on the inner side of the pipeline; a rectifying heater, a first catalyst, a second catalyst, a third catalyst and a standby catalyst are sequentially arranged on the inner side of the tower body, through the arrangement of a heating structure, a mixer and a catalyst structure, nitrate contained in waste gas can be fully mixed, the phenomenon of loss of a large number of reducing agents is avoided, and the denitration effect of the device is further improved.

The invention relates to the technical field of catalyst synthesis, and discloses a catalyst synthesis parameter optimization method and system based on denitration index evaluation, and the method comprises the steps: setting a to-be-selected metal element set, obtaining a test catalyst set based on the to-be-selected metal element set, carrying out the catalytic simulation of the test catalyst set according to a plurality of to-be-denitrated scenes and a denitration performance evaluation standard, and obtaining a catalyst denitration data set, performing deep learning by using the catalyst denitration data set to obtain a catalyst component selection model, and obtaining a target catalyst according to the target scene feature vector and the catalyst component selection model. The design accuracy and denitration performance of the catalyst can be improved, and the development period is remarkably shortened.

The utility model discloses a device for reducing ammonia escape during cement denitration. The device comprises a stirring structure and a vertical movement structure, wherein the stirring structure is arranged at the upper part in an outer cylinder and is used for fully stirring and mixing a cement raw material and a catalyst; the vertical movement structure is used for realizing vertical movement of stirring blades of the stirring structure. The stirring rod drives the limiting wheel to slide on the upper surface of the sliding rail through the connecting plate, when the limiting wheel slides to the convex part of the concave-convex surface of the surface of the sliding rail, the elastic telescopic rod is extruded to enable the stirring blade below to ascend, and when the limiting wheel slides to the concave part of the sliding rail, the elastic telescopic rod is reset to enable the stirring blade to ascend. And the connecting plate and the limiting wheel are extruded downwards, and meanwhile, the stirring blades descend, so that the stirring blades slide up and down while horizontally rotating and stirring in the outer cylinder, and the stirring uniformity and efficiency are remarkably improved, thereby ensuring that a cement raw material and a catalyst are fully mixed, effectively improving the denitration effect and reducing ammonia escape.

The invention discloses a flue gas desulfurization and denitrification energy-saving and environment-friendly device for an industrial boiler, and belongs to the technical field of environment-friendly devices.The flue gas desulfurization and denitrification energy-saving and environment-friendly device comprises a mounting platform and a reactor shell, a reaction cavity, a cleaning cavity and a thermal self-adaption catalysis assembly are arranged in the reactor shell, and a cavity expansion assembly is arranged above the reactor shell; and a flue gas mixing pipe and a discharge pipe are respectively arranged at the end parts of the reactor shell. Through the synergistic effect of the cavity expansion assembly and the cleaning cavity, the reaction space can be dynamically adjusted according to opening and closing of the furnace door of the forging furnace, the denitration activity and the structural stability of the catalytic plug in the furnace door opening period can be maintained by arranging the thermal self-adaptive catalytic assembly, and the denitration efficiency is improved by arranging the cleaning cavity. The multi-stage push cylinder drives the thermal self-adaption catalysis assembly to descend to the cleaning cavity, the high-pressure air nozzle sprays gas to clean the catalysis plug in the descending process, meanwhile, the catalysis plug can be replaced by disassembling the heat preservation clamping plate, and therefore the cleaning and maintaining functions are integrated on a single station, and the working efficiency is improved.

This invention relates to a method for the selective catalytic reduction of NO by ammonia. x This invention relates to a catalyst, its preparation method, and its application, belonging to the field of environmental catalysis and air pollution control technology. The catalyst comprises a support, a main active component, and a modifying agent. The support is selected from SAPO-18 molecular sieve, the main active component is selected from Cu, and the modifying agent is selected from Zr. The space velocity is 88,000 h⁻¹. ‑1 At that time, the ZrCu-SAPO-18 molecular sieve catalyst, within the temperature range of 225–450℃, produced NO x The conversion rate reached over 90%; after hydrothermal treatment at 750℃ for 12 hours, NO was reduced within the range of 175–400℃. x The conversion rate remains above 90%. The catalyst of this invention can be used to remove NO from diesel vehicle exhaust and stationary source flue gas. x Highly efficient removal.

The discharging device for flue gas purification and denitration comprises a purification box, and a purification and denitration mechanism is arranged in the purification box; the purification and denitration mechanism comprises a partition plate, the partition plate is fixed to the purification box and provided with a plurality of through openings, each through opening is provided with a first filter screen, a spraying mechanism is fixed to the upper portion of the partition plate and connected with an external circulating liquid conveying mechanism, and the input end of the circulating liquid conveying mechanism is located below the partition plate and communicated with the interior of the purification box; a treatment tank is mounted at the top of the purification box; the lower end of the treatment tank communicates with the purification box through a conduit; and the upper end of the treatment tank is communicated with the outside through a discharge pipe. The discharge device for flue gas purification and denitration provided by the utility model can improve the flue gas denitration effect.