33results about How to "Improve denitrification efficiency" patented technology

This invention discloses a flue gas denitrification device and method for thermal power plants. The flue gas denitrification device includes: a primary cyclone separator, a secondary electrostatic precipitator, a denitrification tower, a steam heating assembly, and a control module. The secondary electrostatic precipitator is located downstream of the primary cyclone separator in the flue gas flow direction. The denitrification tower is connected to the secondary electrostatic precipitator via a conveying pipe. One end of the conveying pipe is connected to the outlet of the secondary electrostatic precipitator, and the other end is connected to the inlet of the denitrification tower. A temperature sensor is installed on the conveying pipe. The steam heating assembly is used to introduce steam into the conveying pipe. According to this invention, the flue gas denitrification device for thermal power plants effectively removes large and fine dust particles, eliminates the risk of dust clogging and poisoning of the denitrification catalyst, improves the uniformity and efficiency of the denitrification reaction, and avoids dust clogging of the atomizing nozzles, thereby improving denitrification efficiency.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

The application discloses a kind of suitable for SCR denitration ammonia injection device and device, including ammonia injection pipe and the ammonia injection port of setting at ammonia injection pipe end, ammonia injection pipe includes ammonia main pipeline, branch pipeline and branch pipeline;Along ammonia main pipeline circumferential direction, equidistantly there are several branch pipelines;In branch pipeline, equidistantly and parallelly there are several vertical branch pipeline branch pipelines;Several branch pipelines are in the same plane, plane vertical branch pipeline;In branch pipeline, there is vertical plane ammonia injection port;Ammonia injection port gas outlet direction is same with ammonia main pipeline inner gas flow direction.The ammonia injection device suitable for SCR denitration designed in the application, including branch pipeline and branch pipeline, ammonia injection pipeline because each part branch pipe length is small, and the difference of branch pipeline diameter is not big, so it can reduce the flow resistance of ammonia in pipeline.

The utility model belongs to the field of flue gas denitration, especially is involved in a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas. In order to realize emission reduction, the utility model provides a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas, the denitration system includes flue, denitration reactor, flue gas on-line monitor, pure ammonia gas adding system for adding pure ammonia gas to flue and automatic control system;Pure ammonia gas adding system includes the ammonia supply line for conveying pure ammonia gas, flow regulating valve and ammonia gas flowmeter are equipped on ammonia supply line, the downstream end of ammonia supply line is equipped with pure ammonia nozzle located in flue and located in the downstream of flue gas on-line monitor;Automatic control system is used to control the opening of flow regulating valve according to the flow and nitrogen oxide concentration of original flue gas. Directly add pure ammonia gas to original flue gas, and dilute pure ammonia gas using original flue gas, thereby saving the energy consumed by dilution fan and reducing the amount of flue gas finally discharged.

This utility model relates to the field of wastewater treatment technology and discloses a denitrification deep bed filter, including a filter structure. A diversion component and a water storage tank are installed at the top of the tank's interior. An inlet pipe is installed on the outer surface of the tank and on one side of the water storage tank. A drive component is installed on the outer surface of the tank and at the lower end of the inlet pipe. The cleaning component includes a rotating shaft and an external rod installed on the outer surface of the rotating shaft. The outer surface of the external rod is equipped with a carbon fiber brush. When cleaning the filter media, a motor operates, and the rotating shaft installed at one end of the connecting shaft also rotates, driving the external rod to rotate. This facilitates the rotation of the external rod within the filter media, expanding the cleaning range of the filter media. The carbon fiber brush contacts the filter media, and the rotating carbon fiber brush facilitates cleaning of the filter media, preventing impurities from adhering to the surface of the filter media and affecting the water treatment effect.

This utility model relates to an ammonia fuel regenerative combustion device, belonging to the field of energy conservation and emission reduction. It includes an ammonia fuel regenerative chamber and a combustion-supporting chamber, both connected to the furnace via connecting ports. The ammonia fuel regenerative chamber is equipped with a three-way reversing valve for introducing ammonia fuel and discharging flue gas. The ammonia fuel regenerative chamber contains an ammonia cracking regenerative body, a denitrification reducing agent injector, and a denitrification regenerative body. The porosity of both the ammonia cracking and denitrification regenerative bodies gradually decreases along the flue gas outflow (ammonia inflow) direction. The combustion-supporting chamber has a combustion-supporting gas inlet. The angle of the denitrification reducing agent injector is adjustable. An ammonia cracking catalyst is mounted on the ceramic skeleton of the ammonia cracking regenerative body. An SCR reduction catalyst is mounted on the ceramic skeleton of the denitrification regenerative body. This utility model can improve flame stability, increase ammonia cracking efficiency and denitrification efficiency, and reduce NO₂ levels in the combustion device. x Emissions will be reduced to achieve zero carbon emissions from the heating furnace.

This utility model relates to the field of wastewater treatment technology and discloses a biochemical treatment device for high COD and high ammonia nitrogen wastewater. It includes an anaerobic tank, a primary A tank, a primary O tank, a secondary A tank, a secondary O tank, and a UF device connected in sequence. A water seal trough is installed at the outlet of the anaerobic tank, and the water seal trough is connected to the primary A tank via a pipe. A gas stirring device is installed at the bottom of the sealed primary A tank, and the gas stirring device is connected to the outlet of a stirring blower. The top of the primary A tank is sealed, and the top of the sealed primary A tank is connected to the inlet of the stirring blower via a pipe. In this utility model, biogas generated by anaerobic digestion is introduced as the carbon source for denitrification in the sealed secondary A tank, improving the utilization rate of carbon sources within the wastewater and saving the cost of external carbon source supplementation. The large amount of heat generated by aerobic biochemical treatment is used to heat the anaerobic circulating influent through a heat exchanger, increasing the temperature of the anaerobic tank while simultaneously decreasing the temperature of the aerobic tank, achieving energy reuse and enabling the system to achieve a "cost reduction and efficiency improvement" effect.

This invention relates to the field of flue gas purification technology, and discloses a denitrification system and method. The system includes a flue gas duct, a recovery device, a temperature control device, and a denitrification device, with the flue gas duct connected sequentially to each device. The flue gas duct is used to introduce the flue gas to be denitrated; the recovery device is used to recover moisture from the flue gas; the temperature control device is used to regulate the temperature of the flue gas; and the denitrification device is used to separate nitrogen oxides from the flue gas. This invention removes moisture from the flue gas beforehand through the recovery device, avoiding the adverse effects of moisture on the denitrification catalyst; the temperature control device regulates the flue gas to a suitable reaction temperature, improving denitrification efficiency; and the denitrification device catalytically reduces nitrogen oxides, achieving efficient and stable denitrification treatment. The entire system has a compact structure and a reasonable process, effectively avoiding ammonia escape and equipment blockage problems in traditional ammonia-based denitrification methods while achieving efficient denitrification, offering advantages such as energy saving, environmental protection, and stable operation.

The application discloses a selective catalytic reduction flue gas heating device, which comprises a flue gas transmission main line and a combustion furnace chamber, the output end of the combustion furnace chamber is inserted into the flue gas transmission main line, a furnace chamber collector and a burner are arranged in the combustion furnace chamber, a control valve is arranged at the input end of the flue gas transmission main line, a main line collector is arranged in the flue gas transmission main line, and the heating device further comprises a collection system, a data analysis system, a control module and a heater. The selective catalytic reduction injection pipe is directly connected to the obliquely-inserted combustion furnace chamber, is used for direct combustion of the burner, the high-temperature flue gas generated by combustion is mixed with the flue gas of the main line of the internal combustion engine to improve the flue gas temperature of the internal combustion engine, the prepared flue gas heating device is compact in structure, convenient to arrange, simple in preparation process, low in cost, convenient to maintain, can adjust the power of the burner according to different exhaust pipe diameters, and is high in thermal efficiency and economic benefits.

The application provides a coal-fired boiler in-furnace denitration method based on multi-element data fusion, and belongs to the technical field of nitrogen oxide control of coal-fired boilers, which can at least partially solve the problem of low denitration efficiency and low reducing agent utilization rate under wide load conditions caused by the fact that the SNCR denitration in the prior art only relies on temperature field data. The application comprises: arranging a plurality of layers of double-fluid atomizing lances and smoke temperature monitoring probes and CO measuring point probes along the height direction of the boiler furnace; monitoring the cross-sectional temperature field data of each layer of lances in real time; constructing a digital twin model of the NOx concentration field and the CO concentration field based on numerical simulation and machine learning; determining the target operating lance layer within the preset temperature window according to the cross-sectional temperature field data; calculating and correcting the input amount of each lance according to the NOx value and the CO value; and performing feedback adjustment according to the tail flue NOx monitoring data. The application fuses the multi-element data of the temperature field, the NOx concentration field and the CO concentration field, and effectively improves the SNCR denitration efficiency and the reducing agent utilization rate under wide load conditions.

The application discloses a bismuth-nickel-iron composite oxide catalyst, a preparation method and application. A bismuth source, a nickel source and an iron source are dissolved in a mixed solvent of ethanol and ethylene glycol, and then are fully stirred to obtain a mixed solution; oil amine and urea are added into the mixed solution, and after ultrasonic mixing, the mixture is moved to a polytetrafluoroethylene reaction kettle for a solvothermal reaction; after the reaction solution is cooled, the product is washed, dried and calcined, and finally the bismuth-nickel-iron composite oxide catalyst is obtained. The application prepares a spinel nanometer catalyst with stable performance, the NO removal rate of which reaches 90% at 175 DEG C, the denitration efficiency of which is as high as 100% at 225 DEG C, the medium-low temperature denitration performance of which is excellent, and the catalyst has the characteristics of high CO-SCR denitration efficiency and magnetic recyclability. In addition, proper bismuth doping is beneficial to improving the sulfur resistance of the nickel-iron catalyst, and thus the catalyst has a wide application prospect.

The utility model discloses an accurate ammonia spraying device for a denitration system, which relates to the technical field of denitration and comprises a denitration tank and an upper cover, an ammonia spraying box is arranged at the center of the upper cover, the lower end of the ammonia spraying box is connected with a vertically downward ammonia adding cylinder, and the ammonia adding cylinder extends downwards into the denitration tank and coincides with the central axis of the denitration tank. A mounting circular truncated cone device is fixedly connected to the lower end of the ammonification cylinder, a stirring device is rotatably connected to the mounting circular truncated cone device, a vertically-arranged adjusting device is slidably connected to the mounting circular truncated cone device, the adjusting device comprises a first piston column and a second piston column, and the first piston column and the second piston column are connected through a connecting plate; waste gas adding devices are arranged on the two sides of the ammonia spraying box, each waste gas adding device comprises an air pump, the lower end of each air pump is connected with a vertically-downward ventilation cylinder, and the ammonia adding cylinders and the ventilation cylinders are in sliding sealing connection with a first piston column and a second piston column correspondingly. The denitration efficiency is improved.

The utility model discloses a movable filter sieve built in a cement denitration tower, which comprises two filter plates and a catalyst plate, and the catalyst plate is arranged between the two filter plates and is used for filtering after a denitration catalyst is catalyzed; the filter sieve comprises a catalyst fixing frame and two filter plate fixing frames, the two filter plate fixing frames are movably mounted at the upper end and the lower end of the catalyst fixing frame through hinges, and the corresponding filter plates are clamped in the filter plate fixing frames, so that the filter plates on the filter sieve are convenient to mount and replace. A traditional integrated filter sieve is arranged to be of a split structure, the filter plate fixing frames are movably connected to the two sides of the catalyst fixing frame through the hinges, and then the filter plates are clamped and installed in the filter plate fixing frames, so that the filter plates are convenient to replace and clean in the denitration process, and the denitration efficiency is improved. Therefore, the flue gas denitration efficiency and denitration quality in the cement denitration tower are improved.

The utility model discloses a kind of precision ammonia injection SCR denitration systems, the system includes flue, ammonia injection mixer, rotary denitration box and control system.Ammonia injection mixer is located in flue, including multiple ammonia injection mixing units, each unit is equipped with reducing pipe, coil pipe, cavity, ammonia gas distribution pipe and nozzle.Catalyst grid plate rotatable is equipped in denitration box, is divided into denitration chamber and replacement chamber by partition plate, cooperation sealing assembly realizes catalyst replacement without stopping machine.The utility model is compact in structure, ammonia injection is uniform, and it is strong to prevent blockage, and catalyst online replacement can be realized, suitable for coal-fired power plant, industrial boiler and the like flue gas denitration scene.

This invention discloses a catalytic device for denitrification treatment of ship exhaust gas, belonging to the field of exhaust gas treatment technology. The catalytic device for denitrification treatment of ship exhaust gas includes a denitrification container and an inlet pipe and an outlet pipe respectively disposed at both ends of the denitrification container. It also includes: an ammonia injection assembly disposed at the top of the denitrification container; a denitrification section disposed inside the denitrification container, the denitrification section including a rotating frame and a plurality of catalyst blocks evenly arranged circumferentially on the rotating frame; and a flow guide section disposed inside the denitrification container and between the ammonia injection assembly and the denitrification section. This invention achieves dynamic and uniform mixing of ammonia and flue gas through the combined rotation and oscillation motion of the ammonia injection ring and the reciprocating oscillation of the flow guide plate. By having the catalyst blocks work alternately driven by the rotating frame, combined with mechanical cleaning by a flexible scraper and backflushing of flue gas from the leeward side, the catalyst achieves self-cleaning and balanced load, extending catalyst life, reducing back pressure, reducing ammonia escape, and improving denitrification efficiency and operational stability.

This invention provides a method for preparing a biological denitrification composite carbon source for wastewater treatment plants, belonging to the field of wastewater treatment. The method includes the following steps: 1. Crushing kitchen waste residue, treating it in boiling water, cooling it, and then fermenting it to obtain a carbon source fermentation broth; 2. Filtering the carbon source fermentation broth, adding an accelerator and straw fragments to the liquid-phase carbon source broth to obtain a liquid-phase carbon source, mixing the liquid-phase carbon source and solid-phase carbon source evenly, and crushing them to obtain a carbon source mixture; 3. Spraying an alkenylated polyvinyl alcohol solution onto the surface of the carbon source mixture, molding it, and drying it to obtain the aforementioned biological denitrification composite carbon source for wastewater treatment plants. The biological denitrification composite carbon source prepared by this invention can simultaneously and slowly release the solid and liquid components in the carbon source fermentation broth, and also promotes the effective utilization of the carbon source by denitrifying bacteria, exhibiting good denitrification utilization.

The utility model relates to flue gas treatment field of atmospheric pollution control industry, concretely relates to a desulfurization dust removal denitration integrated equipment. The desulfurization dust removal denitration integrated equipment includes: support separation structure, which separates desulfurization dust removal denitration integrated equipment into three layers of upper, middle and lower in vertical direction, separates into middle area and peripheral area in horizontal direction, denitration chamber is arranged in middle layer middle area, exhaust port is arranged in middle layer middle area, below denitration chamber, air inlet is arranged in lower layer middle area, below exhaust port, N desulfurization filter chambers are symmetrically arranged in middle layer peripheral area, peripheral of denitration chamber and exhaust port, S ash bucket is arranged in lower layer peripheral area, upper box gas chamber is arranged in upper layer area, and N desulfurization filter chambers of the peripheral area and denitration chamber of middle area are communicated. The utility model discloses desulfurization dust removal denitration integrated equipment, and the land area is small, and the investment is saved.

The invention discloses a self-adaptive ammonia spraying device for flue gas denitrification, relates to the technical field of flue gas denitrification environmental protection, and is used for improving the denitrification efficiency. In the device, a cooperative control framework of static hardware matching and dynamic software adjustment is constructed by the flue gas denitration self-adaptive ammonia spraying device, so that complex online mechanical adjustment is converted into external fluid control, and the problems of jamming and abrasion in a high-temperature and high-dust environment are solved by utilizing a fixed gap unit without a movable component; therefore, the long-term operation reliability of the flue gas denitration self-adaptive ammonia spraying device is improved. And meanwhile, by combining the fusion calculation of the AI model on the multi-source data and a double-level intelligent diagnosis early warning mechanism, the dual self-adaption of the ammonia spraying strategy on the space non-uniformity and the time change is realized, so that the denitration efficiency is improved on the premise of improving the stability of the flue gas denitration self-adaptive ammonia spraying device.

The invention relates to the technical field of environmental catalysis, and discloses a denitration catalyst with high denitration efficiency and a preparation method thereof.The denitration catalyst takes TiO2-WO3-SiO2 as a composite carrier, V2O5 as a main active component and CuO and CeO2 as auxiliary active components, and the denitration catalyst comprises, by mass, 1.5%-3.0% of V2O5, 2.0%-4.0% of CuO, 1.0%-2.5% of CeO2, 5.0%-8.0% of WO3, 3.0%-5.0% of SiO2 and the balance TiO. By optimizing the ratio of the composite carrier and the loading mode of the active components, the specific surface area and the number of active sites of the catalyst are remarkably increased, the NOx adsorption and activation capacity of the catalyst is enhanced, and the catalyst has excellent sulfur resistance, water resistance and thermal stability. The preparation method is simple in process, controllable in cost, good in repeatability and suitable for industrial large-scale production.

This invention provides a flue gas denitrification method in which flue gas is contacted with a corrugated plate catalyst in the presence of ammonia for denitrification treatment. The corrugated plate catalyst includes a support and active components, wherein the active components include oxides of cerium, vanadium, and tungsten. The mass ratio of cerium oxide to the support is (5-20):100, the mass ratio of vanadium oxide to the support is (0.5-10):100, and the mass ratio of tungsten oxide to the support is (1-12):100. This method has the advantages of high denitrification efficiency and good stability, effectively reducing pollutant emissions.

The application discloses a device and method for preventing catalyst blockage in an SCR reactor, which divides a cross section of the SCR reactor into a plurality of grid units along an X direction and a Y direction, arranges a first layer of guide plates composed of a plurality of guide plates capable of rotating at an angle along the X direction, a second layer of guide plates composed of a plurality of guide plates capable of rotating at an angle along the Y direction and a plurality of flue gas flow rate detection devices in the reactor; along the airflow direction, the first layer of guide plates, the second layer of guide plates, an SCR catalyst layer and the flue gas flow rate detection devices are sequentially arranged, and the flue gas flow rate detection devices are arranged at the center positions of each grid unit and used for detecting the flue gas flow rate after passing through the catalyst bed layer. The application measures the airflow speed of different grid areas, judges the catalyst blockage condition of the area, increases the flue gas flow rate of the area by adjusting the corresponding guide plate of the area, thereby flushing away the existing dust, preventing the catalyst from being further blocked and improving the SCR denitration efficiency.

The utility model discloses a marine SCR denitration reactor relates to marine exhaust gas treatment equipment technical field, including the reaction box, one end of reaction box is installed and penetrates the air inlet pipe, the outer wall of air inlet pipe is installed with the injection device, and the part of injection device inserts in the inside of air inlet pipe, the utility model discloses, through setting two groups of porous distribution board in the inside of reaction box, makes the exhaust gas even distribution through porous distribution board, through setting catalyst device, under the cooperation of multilayer catalyst module and two group vertical concave seat, the multilayer catalytic module is removed from the inside of reaction box conveniently, and the convenient installation, dismount and replacement, and the certain interval is left between catalyst module in multilayer catalyst module, to guarantee that exhaust gas can fully contact catalyst reaction, and under the cooperation of injection device and static mixer, can greatly improve the efficiency of denitration reaction.

The invention discloses a honeycomb vanadium-based denitration catalyst and a preparation method thereof, and belongs to the technical field of denitration catalysts. The catalyst is prepared from the following components in percentage by mass: 0.1%-4% of ammonium metavanadate, 2%-5% of ammonium tungstate, 3%-10% of nanoscale titanium powder, 3%-4.5% of a pore forming agent, 1%-2.5% of a binder and the balance of titanium dioxide, the particle size of the nanoscale titanium powder ranges from 50 nm to 100 nm. The nanoscale titanium powder is introduced, and the oxidation exothermic peak of the nanoscale titanium powder is controlled to be matched with the decomposition temperature of ammonium metavanadate in the calcining process, so that the mechanical strength (the axial compressive strength is greater than or equal to 5.0 MPa) is remarkably improved while the high aperture ratio (greater than or equal to 70%) and the thin-wall structure (0.3-0.8 mm) are maintained, and the problem that an existing catalyst is difficult to consider high aperture ratio, thin wall and high strength at the same time is solved.

The utility model belongs to the technical field of catalyst dust removal, and particularly relates to a boiler flue gas SCR denitration dust removal uniform distributor which comprises a flue gas discharge pipe, an impurity removal assembly comprises a dust removal settling chamber communicated with the flue gas discharge pipe, a dust removal grating is connected in the dust removal settling chamber, and a soot blower is installed in the dust removal settling chamber. The soot blower and the dust removal grid are correspondingly arranged, the SCR reactor is connected to the bottom of the flue gas discharge pipe, a gas inlet port of the SCR reactor is communicated with the flue gas discharge pipe, and the ash discharge assembly is connected to the outer side of the dust removal settling chamber and is arranged corresponding to an ash discharge port of the dust removal settling chamber. Large particles and viscous substances in the flue gas are blocked on the surface of the dust removal grid, most dust is output to the dust discharge port along the inclination angle of the dust removal grid under the action of gravity, and a small part of unstripped dust is blown off by the installed soot blower regularly, so that the cleanliness of the input flue gas is ensured.

This invention discloses a high-temperature, high-dust-content flue gas purification device, relating to the field of flue gas purification technology. The device includes an adjustable purification structure comprising multiple ceramic filter elements. SCR catalyst components are coated on the surface of each ceramic filter element. A swirling ammonia injection grille is installed at the inlet end of each ceramic filter element. An attitude adjustment mechanism is connected to the purification structure. A PLC control system is electrically connected to the attitude adjustment mechanism, which controls the ceramic filter elements of the purification structure to switch between vertical, inclined, and parallel settings. In the vertical setting, flue gas passes through the filter element in a straight line from top to bottom or bottom to top. In the inclined setting, flue gas passes through obliquely, forming a "Z"-shaped path. In the horizontal setting, flue gas flows laterally through the filter element, and particulate matter is deposited downwards under gravity. This invention solves the problem of low removal efficiency of fine particulate matter, achieving highly efficient purification of high-temperature, high-dust-content flue gas, and is particularly suitable for treating high-emission flue gas under complex operating conditions.

The invention discloses a structure and method for preventing urea crystallization of a marine engine SCR system, and relates to the technical field of engines. According to the structure and method for preventing urea crystallization of the marine engine SCR system, a mixing pipe, an inclined plate, a perforated plate and a urea spray gun are included, the inclined plate is arranged at the position of the axis in the mixing pipe and used for exciting turbulent flow, the perforated plate is located on the rear side of the inclined plate and used for evenly distributing a flow field, and the urea spray gun sprays urea into the optimized flow field. According to the method, composite structure parameters are optimized through CFD flow field simulation to adapt to marine working conditions; the flow field is cooperatively regulated through the composite structure, the evaporation rate of urea liquid drops is larger than or equal to 98%, the wall impact rate is smaller than or equal to 1%, crystallization is eradicated from the source, ship rolling and pitching and engine full-load fluctuation are adapted, the NOx conversion efficiency is larger than or equal to 90%, the exhaust back pressure rise is smaller than or equal to 5 kPa, extra energy consumption is not needed, the reliability of an SCR system is greatly improved, and the operation and maintenance cost is reduced.

The invention discloses a system for co-processing nitrogen-containing antibiotic mushroom dregs and synchronously denitrifying in a cement kiln and a use method thereof, which can realize harmlessness and recycling of hazardous wastes. Nitrogen-containing antibiotic mushroom dregs are quantitatively fed into a stepped gasification furnace, high-temperature hot flue gas at the tail of a cement kiln provides gasification energy for the stepped gasification furnace, nitrogen-containing organic matter in the mushroom dregs is converted into gasified gas mainly containing NHH, and the NHH can be directly used as a denitration reducing agent. An SNCR denitration process is coupled in a gasified gas conveying path, NH generated by gasification and ammonia water sprayed by SNCR form a combined reducing agent system, and the use amount of SNCR ammonia water is reduced. Part of cement raw materials are introduced into the stepped gasification furnace, and coking can be avoided while the gasification temperature field in the furnace is adjusted. Through the synergistic process of mushroom residue gasification, gasified gas denitration, residue combustion and raw material regulation, the environmental risk of mushroom residues is broken, and harmlessness and recycling of the mushroom residues are achieved.

This utility model discloses a high-efficiency SNCR denitrification device for a waste incinerator, including a reactor body. The reactor body has flue gas channels at both ends, with an inlet and an outlet at each end. A fixed frame is mounted on the top of the reactor body, and a spray assembly is mounted on the fixed frame. The spray assembly includes a mounting plate, a drive source, an output shaft, a moving guide rail, a support plate, spray pipes, and multiple sets of symmetrically arranged spray heads. The output shaft is connected to a deflection plate, which is connected to a connecting rod. A contact wheel is rotatably mounted on the connecting rod, and the contact wheel can contact one side of the support plate. The drive source drives the deflection plate to rotate, which in turn pushes the support plate along the moving guide rail via the contact wheel, causing the spray heads to move and spray in the area above the furnace, improving the uniformity and utilization rate of the denitrification agent coverage.

This invention discloses a static mixer and an SCR flue gas denitrification ammonia injection mixing system. The static mixer is installed in the flue and includes multiple static mixing components, a groove, and a second row of ash pipes. Each static mixing component includes: a narrowing section, which is a hollow tubular structure with an upper opening area smaller than its lower opening area; a guide section located above the narrowing section; and at least one turbulence section, which is a concave hollow structure with an upper opening located below or inside the narrowing section, with its bottom connected to the first row of ash pipes. The first row of ash pipes is used to discharge dust from the turbulence section into the flue. This invention can improve the uniformity of ammonia mixing with flue gas while removing dust from the flue gas, thereby mitigating blockage of ammonia nozzles, catalyst bed pores in flue gas denitrification technology, and downstream equipment, thus reducing ammonia escape and effectively overcoming a series of problems caused by ammonia escape.

The utility model belongs to the technical field of sewage treatment, and particularly provides an arc-shaped water inlet weir of a denitrification filter tank, which comprises a weir body and a weir plate, the weir plate is fixed on the weir body, the weir plate is an arc-shaped plate, the upper end of the weir plate is tangent to the water inlet flow direction of an upstream water body, and the lower end of the weir plate extends below the water surface of a downstream water body; and the perforation rate of the weir plate is gradually increased along the water flow direction. The water inlet weir structure can effectively reduce water drop reoxygenation, reduce the adding amount of a carbon source, realize uniform water distribution and improve the denitrification efficiency.