1499 results about "Nitrogen oxides" patented technology

The invention relates to a boiler combustion optimization control system of a thermal power plant, relates to the technical field of thermal power generation control, and aims to solve the problems of inaccurate multi-source data perception, slow control response and insufficient multi-target collaborative optimization capability under fire coal quality fluctuation and load change. The system comprises a data perception and fusion module, a working condition self-adaptive identification module, a multi-target dynamic optimization decision module and a distributed execution control module, and through multi-source data acquisition and feature extraction, depth time sequence mode identification, multi-target optimization model solving and distributed coordination control, the multi-target dynamic optimization decision module and the distributed execution control module are subjected to multi-source data fusion. Dynamic balance of boiler heat efficiency improvement and nitrogen oxide emission reduction is achieved, and adaptability and control precision of the system under complex working conditions are enhanced.

The invention discloses a method for predicting nitrogen oxide infection change of a plant based on an AI image in the technical field of plant research, and the method comprises the steps: building a dynamic mapping relation of morphological indexes-infection concentration and time; the image morphology of the plant under time lapse and / or other concentrations is directly predicted by inputting the current image of the plant, the plant tissue does not need to be damaged, the whole-stage dynamic monitoring of the same plant from the health state to the pollution stress can be realized through regular image acquisition, the interference of traditional chemical sampling on the plant growth is avoided, and the monitoring accuracy is improved. The method is particularly suitable for rare plant or long-term ecological research, the abstract RGB value and the nitrogen oxide concentration are converted into visual results such as a color gradient diagram and a dynamic feature point evolution curve, non-professionals can rapidly judge the pollution level through color depth and patch distribution, and the environment early warning response time is shortened.

The utility model discloses a lepidolite spodumene roasting flue gas multi-pollutant efficient treatment device which comprises a high-temperature dust removal and denitration integrated tower, a fan, a flue gas deacidification tower and a flue gas heat exchanger, the high-temperature dust removal and denitration integrated tower is communicated with a kiln tail of a roasting kiln, and a cooling section of the flue gas heat exchanger is communicated with the high-temperature dust removal and denitration integrated tower and the fan. Flue gas is subjected to heat exchange in the cooling section and then conveyed to the flue gas deacidification tower through a fan, a gas outlet of the flue gas deacidification tower is communicated with the heating section of the flue gas heat exchanger, the flue gas is subjected to heat exchange with flue gas of the high-temperature dust removal and denitration integrated tower in the flue gas heat exchanger to be heated, and the flue gas is discharged through a chimney communicated with the heating section on the flue gas heat exchanger. The device disclosed by the utility model can be used for cooperatively treating various pollutants including dust, SO2, HF, HCL, nitrogen oxides, dioxin, heavy metals and the like, so that high-efficiency treatment on flue gas is realized, and good economic benefits are achieved.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body and a combustion head, the fire grate body is provided with a mixing cavity and at least two air inlet flow channels, the mixing cavity is provided with a fire opening, the exhaust ends of the at least two air inlet flow channels are communicated with the mixing cavity, and the combustion head is communicated with the mixing cavity. The gas inlet end of each gas inlet flow channel forms an injection opening, each injection opening is used for conveying gas and air to the corresponding gas inlet flow channel, the combustion head is arranged on the fire opening, and the combustion head is provided with a plurality of fire holes communicated with the mixing cavity. According to the technical scheme provided by the invention, the primary air coefficient of the fire grate can be increased, the overall high temperature of the combustion head is prevented, and the flame distribution of the combustion head is more uniform, so that the local high temperature of the combustion head is avoided, the generation of thermal nitrogen oxides can be greatly reduced, and the emission of harmful substances is reduced.

The invention relates to the technical field of industrial measurement, and provides an industrial process soft measurement method and device, a storage medium and computer equipment, and the method comprises the steps: obtaining a historical process data set of a coal-fired boiler, training a dynamic measurement and prediction model based on the historical process data set, and obtaining a trained dynamic measurement and prediction model; acquiring real-time process data of the coal-fired boiler and a working condition weight of a previous moment corresponding to the real-time process data; and inputting the real-time process data and the working condition weight of the previous moment corresponding to the real-time process data into the trained dynamic measurement and prediction model to obtain a real-time nitrogen oxide concentration estimated value. According to the embodiment of the invention, the working condition weight of the previous moment is introduced as model input, so that the dynamic measurement prediction model can effectively capture the dynamic association and evolution rule of the working condition state in the time sequence, and the accuracy and reliability of the real-time soft measurement estimation value of the nitrogen oxide concentration of the coal-fired boiler are effectively improved.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body, the fire grate body is provided with a mixing cavity, a first air inlet flow channel and a second air inlet flow channel, the mixing cavity is provided with an air outlet, and the air inlet end of the first air inlet flow channel is provided with an injection opening used for introducing air and fuel gas; the exhaust end of the first air inlet flow channel is communicated with a mixing cavity, the air inlet end of the second air inlet flow channel is provided with an air inlet used for introducing air, the exhaust end of the second air inlet flow channel is communicated with the first air inlet flow channel, and the second air inlet flow channel is used for jetting flow to the first air inlet flow channel. A jet flow angle is formed between the jet flow direction of the second gas inlet flow channel and the gas conveying direction of the first gas inlet flow channel, and the jet flow angle is larger than 45 degrees and not larger than 70 degrees. And the combustion head part is arranged at the air outlet, and the combustion head part is provided with a fire hole communicated with the mixing cavity. According to the technical scheme provided by the invention, emission of carbon monoxide and nitrogen oxide can be reduced.

The invention discloses a device and a detection method for online oxidation-enrichment-reduction determination of nanogram-level nitrogen isotopes in a solid, and belongs to the technical field of nitrogen isotope analysis. The device comprises an oxidation system, a nitrogen oxide enrichment system, a nitrogen reduction system, a mass spectrum interface system, a stable isotope ratio mass spectrometer and pipelines for connecting all parts of the device. The device provided by the invention greatly reduces the quantitation limit of the nitrogen isotope in the solid sample, can realize high-precision determination of the nanogram-level nitrogen isotope in the solid sample, and has the advantages of simplicity and convenience in operation, high accuracy and the like.

The present invention relates to the technical field of medicine. Specifically, the present invention relates to a KRAS inhibitor compound, a pharmaceutical composition thereof, and a use thereof. Specifically, the present invention relates to a compound as represented by formula (I), or a stereoisomer, tautomer, nitrogen oxide, solvate, metabolite, pharmaceutically acceptable salt, or prodrug of the compound as represented by formula (I). The compound and the pharmaceutical composition thereof provided in the present invention can be used for preparing medicaments for preventing or treating diseases related to KRAS amplification or mutations such as KRAS G12A, KRAS G12C, KRAS G12D, KRAS G12R, KRAS G12S, KRAS G12V, KRAS G13D, or KRAS Q61H, and can especially be used for preparing medicaments for preventing or treating cancer.

The invention discloses a vacuum sputtering preparation process of a multi-layer gradient color film for a streaming media rearview mirror cover plate, and belongs to the technical field of magnetron sputtering coating. The process depends on vacuum sputtering equipment comprising an upper sheet translation table, an upper sheet table, a sheet inlet chamber, a front fine extraction chamber, a front buffer chamber, a first coating chamber, a transition chamber, a second coating chamber, a rear buffer chamber, a rear fine extraction chamber, a sheet outlet chamber, a lower sheet table, a lower sheet translation table and the like. The method comprises the steps of glass substrate pretreatment, vacuum buffer stabilization, preparation of an aluminum layer and a silicon-aluminum alloy layer in a first coating chamber, stress release in a transition chamber, preparation of an aluminum-nitrogen oxide layer in a second coating chamber, post buffer stabilization, sheet discharging and discharging and the like. The technical effects that the color is continuously adjustable, the adhesive force of the film layer is high, the optical and electrical properties are balanced, and the production efficiency is high are achieved.

The invention provides an oxygen vacancy adjustable catalyst for synergistically removing nitrogen oxides and volatile organic compounds as well as a preparation method and application of the oxygen vacancy adjustable catalyst. The catalyst takes natural ore as a raw material, main active components are MnO2 and Fe2O3, and an inert component is mainly SiO2. The catalyst with different oxygen vacancy concentrations is obtained by regulating and controlling the ratio of the active components and the calcining atmosphere, and the catalyst has good catalytic performance of synergistically removing nitrogen oxides and volatile organic compounds. Under the conditions that the volume space velocity (24000 h <-1 >) is high, the concentration of NO and NH3 is 500 ppm, the concentration of toluene is 50 ppm and 5 vol.% O2 / N2, the conversion rate of NO is kept at 80% or above within the range of 90-260 DEG C, and the conversion rate of toluene reaches 50% at the temperature of 114 DEG C and reaches 90% at the temperature of 224 DEG C. The simple preparation method is utilized, ores are selected as active components, the catalyst with the adjustable oxygen vacancy is prepared, and the catalyst is suitable for collaborative purification of NOx and VOCs in flue gas in the industries of coal-fired power plants, cement, metallurgy and the like.

The utility model discloses a smoke imaging device fusing ultraviolet ray and visible light, which comprises an ultraviolet detection module, a visible light detection module and a signal control module, the ultraviolet detection module comprises an ultraviolet telephoto lens, a shading cylinder, an ultraviolet camera and an optical filter device, and the shading cylinder is arranged at the front end of the ultraviolet telephoto lens; the visible light detection module comprises a visible light telephoto lens matched with the ultraviolet telephoto lens and a visible light camera; the visible light detection module is located on one side of the ultraviolet detection module so that ultraviolet light and visible light can be in the same view field. And the signal control module is respectively connected with the ultraviolet detection module and the visible light detection module and is used for receiving information and processing data. The scheme provided by the utility model can solve the problems of poor portability, poor sensitivity, complex operation, limited precision, high cost, short detection distance and the like of the existing technology for monitoring pollutants such as sulfur dioxide, nitrogen oxide and the like, and has great application prospects and social significance.

The invention discloses a multi-angle micro-pipe staged combustion rotational flow gas burner, and relates to the technical field of industrial burners and low-nitrogen combustion. According to the low-nitrogen combustor, the problem that the combustion stability and the nitrogen oxide emission control level are difficult to optimize at the same time due to the fact that an existing low-nitrogen combustor cannot achieve fuel uniform distribution on the microscale is solved. The device comprises an on-duty flame system, a main flame system, an air supply channel and a flue gas recirculation structure, the on-duty flame system realizes multi-angle uniform injection of fuel through a multi-angle fuel distribution device to form stable central on-duty flame; the main flame system realizes fuel grading through an inner and outer ring mixing pipe; the flue gas recirculation structure introduces backflow flue gas into the combustion area through the flaring of the mixing pipe and the entrainment opening of the arc-shaped air sleeve, the backflow flue gas is mixed with air or fuel gas, and the combustion temperature and the oxygen concentration are effectively reduced. Through the synergistic effect of staged combustion and flue gas recirculation, the effects of stable combustion, uniform flame and low NOx emission are achieved.

The invention discloses a nitrogen oxide sensor verification method and device and an engine. Whether a nitrogen oxide sensor has an untrusted fault or not can be judged in time. The nitrogen oxide sensor verification method comprises the following steps: when an oxygen concentration value measured by a target nitrogen oxide sensor is abnormal and oxygen concentration values measured by other nitrogen oxide sensors are normal, triggering a mutual verification mechanism; based on the mutual verification mechanism, calculating an oxygen concentration average value of the target nitrogen oxide sensor and all oxygen concentration average values of all nitrogen oxide sensors; when the absolute value of the difference value between the average oxygen concentration value and the average value of all the oxygen concentrations is larger than a preset threshold value, prompt information about the untrusted fault of the target nitrogen oxide sensor is sent out.

The invention relates to the technical field of boiler combustion control, in particular to a through-flow boiler ultra-low nitrogen combustion control system based on multistage flue gas recirculation. Comprising a flue gas grading circulation unit; the low-nitrogen combustion regulation and control unit is used for realizing staged mixed combustion of fuel and circulating flue gas, and a staged combustion structure is matched with an air-fuel ratio dynamic regulation technology; the working condition parameter sensing unit is used for acquiring boiler combustion and flue gas state parameters in real time, integrating a multi-source sensor module and constructing a multi-dimensional operation parameter set; and the intelligent cooperative control unit is used for coordinating dynamic control of the ultra-low nitrogen combustion process. High-temperature and low-temperature independent flue gas circulation branches are arranged through the flue gas staged circulation unit, and a staged combustion structure of a main combustion section and a re-combustion section of the low-nitrogen combustion regulation and control unit is combined, so that the problem of non-uniform distribution of a hearth temperature field caused by compact combustion space and dramatic change of a flow field of the through-flow boiler can be solved; therefore, the generation of thermal nitrogen oxides is inhibited.

This invention relates to the field of petroleum refining and chemical engineering, and discloses a method for hydrogenating waste tire pyrolysis oil. The method includes the following steps: (1) in the presence of hydrogen, the waste tire pyrolysis oil raw material undergoes a gas-phase desulfurization reaction in a first gas-phase hydrogenation reactor to obtain a gas-phase desulfurization reaction product; (2) the gas-phase desulfurization reaction product is subjected to gas-liquid separation to obtain a gas-phase component and a liquid-phase component; (3) the liquid-phase component is pressurized and mixed with hydrogen, and then subjected to a liquid-phase dearomatics reaction in a second hydrogenation reactor to obtain a liquid-phase dearomatics reaction product; the nitrogen content in the waste tire pyrolysis oil raw material is 3000-10000 μg / g. This method uses waste tire pyrolysis oil from the middle distillate as raw material, achieving deep desulfurization while reducing the removal of nitrogen oxides and monocyclic aromatic hydrocarbon saturation. It also simplifies the overall process flow, reduces the reaction severity, and lowers energy and hydrogen consumption.

The invention discloses a fire grate, a combustor and a water heater, and relates to the technical field of water heaters, the fire grate comprises a fire grate body, the fire grate body is provided with a first air inlet flow channel, a mixing cavity and a fire hole, the first air inlet flow channel is provided with a first air inlet, and the exhaust end of the first air inlet flow channel, the mixing cavity and the fire hole are sequentially communicated; the flow guide part is arranged on the fire grate body, the flow guide part and the fire grate body define a second air inlet flow channel, and the second air inlet flow channel is provided with a second air inlet; the second air inlet flow channel comprises a first flow channel section, a second flow channel section and a third flow channel section which are sequentially arranged from the second air inlet to the mixing cavity, the overflowing sectional area of the first flow channel section is reduced towards the side close to the second flow channel section, and the overflowing sectional area of the second flow channel section is increased towards the side close to the third flow channel section; the third runner section is communicated with the mixing cavity. According to the technical scheme, the air content in the fire grate can be increased, the mixing degree of fuel gas and air is increased, sufficient combustion can be achieved, and the emission amount of nitric oxide in smoke is reduced.

The invention discloses an ammonia escape control system of a selective catalytic reduction denitration system, and relates to the technical field of flue gas denitration of thermal power generating units. Accurate data support is provided for fine adjustment of the ammonia spraying amount by collecting and feeding back the nitrogen oxide concentration at the key position in the flue, so that the area with low local denitration efficiency is identified; meanwhile, the ammonia spraying amount is controlled through independent ammonia supply mother pipes and independent electric control valves on the basis of a plurality of ammonia spraying areas arranged in a matched mode of the measuring unit, a closed-loop control system with the regional nitrogen oxide concentration as a core feedback variable is formed, and each ammonia spraying area can respond independently; the problem of excessive or insufficient ammonia caused by traditional'one-step 'ammonia spraying is avoided, the ammonia spraying uniformity is improved, and the ammonia escape rate and the ammonia salt accumulation degree are reduced.

The invention discloses a multi-stage ammonia-doped combustion nitrogen and carbon reduction system for a coal-fired boiler. The system comprises an ammonia supply device and a boiler, the ammonia supply device is arranged on one outer side of the boiler; a pulverized coal burner, a pure ammonia burner, a first-stage ammonia gas multi-nozzle spray gun, a first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, a flue gas NOX concentration detector, a second-stage ammonia gas multi-nozzle spray gun, a second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun and a platen superheater are arranged in the boiler; the ammonia supply device is respectively connected with the pure ammonia burner, the first-stage ammonia gas multi-nozzle spray gun, the first-stage ammonia-hydrogen mixed gas multi-nozzle spray gun, the second-stage ammonia gas multi-nozzle spray gun and the second-stage ammonia-hydrogen mixed gas multi-nozzle spray gun. According to the invention, the coal-fired unit is subjected to multi-stage blending combustion of ammonia gas and is provided with multi-stage SNCR denitration reaction zones, so that the replacement of zero-carbon fuel ammonia to coal is realized, the requirement on the concentration of nitrogen oxide in front of the inlet of the original SCR device of the unit is met, and a new way is provided for carbon emission reduction of a coal-fired boiler.

The embodiment of the invention provides a low-emission and high-efficiency boiler combustion control and management system, relates to the technical field of low-emission and high-efficiency boiler combustion control and management systems, and aims to solve the problems that the combustion efficiency is reduced and the emission of nitrogen oxides is increased due to poor air-coal matching synergism. The system comprises a sensor array, a data acquisition and preprocessing module, a multivariable coupling analysis engine, a combustion state collaborative decision center and an actuator driving array, and an optimal air-coal ratio set point is generated in real time through deep neural network modeling and a multi-target dynamic optimization algorithm. And the actuating mechanism is driven to cooperatively adjust air supply, fuel and flue gas recirculation, so that cooperative control of high efficiency and low emission is realized.

The invention relates to a cooperative control method and system for lean-burn emission of a marine low-zero carbon fuel engine. The method comprises the steps that real-time in-cylinder pressure and temperature data are collected, and an in-cylinder pressure curve and an in-cylinder temperature curve are obtained through time sequence alignment, filtering denoising and interpolation fitting processing; extracting time sequence data based on the curve, calculating average effective pressure and peak temperature in a cylinder to determine a current load interval, and marking a risk tag sequence; calculating the generation rate of the nitrogen oxides and the particulate matters by matching with reaction condition parameters, and extracting reverse variation characteristics to obtain strong mutual exclusion correlation of the nitrogen oxides and the particulate matters; and based on the associated starting model, predicting and controlling the output oil injection quantity and the air inflow adjusting quantity, calculating the transient time sequence lag quantity through a dynamic lag model, and after superposition, calibrating through a combustion phase matching algorithm to generate an oil injection timing and air inlet valve opening control instruction after transient adjustment. The method is adaptive to the combustion characteristics of low-zero-carbon fuel, emission contradictions are accurately captured, transient emission peak values are avoided, and multi-pollutant collaborative control is achieved.

The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three-way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material.

The invention relates to the technical field of flue gas purification and recovery, in particular to an ultralow emission system and method for chemical looping combustion flue gas. The system comprises a fuel reactor, a flue gas outlet of the fuel reactor is connected with an inlet of a cyclone separator, and a first nitrogen oxide removal unit and a second nitrogen oxide removal unit are sequentially arranged on an outlet flue of the cyclone separator; the outlet flue is sequentially connected with the dust removal unit, the desulfurization unit and the recycling unit, and part of flue gas treated by the dust removal unit is used for diluting a denitration reducing agent in the second nitrogen oxide removal unit and / or returns to the fuel reactor for cyclic utilization; and part of recycled flue gas treated by the recycling unit is at least used for atomization of a denitration reducing agent in the first nitrogen oxide removal unit, and / or returns to the chemical looping coal feeding system. According to the system and the method, a whole-process treatment link of denitration, dust removal, desulfurization and carbon dioxide capture and recovery of the chemical looping combustion flue gas is constructed, corresponding pollutants are accurately removed by each unit, and the flue gas is recycled.

The invention discloses a marine nitrogen oxide reducing agent and a preparation method thereof, and belongs to the technical field of marine nitrogen oxide reducing agents, the preparation method comprises the steps of hydrolytic crystallization, dissolution, filtration, fine filtration and ultrafiltration; the hydrolytic crystallization comprises the following steps: mixing industrial urea and tertiary water, stirring at 73-75 DEG C, cooling for the first time, adding dodecynediol polyoxyethylene ether, cooling for the second time, adding a mixed urea solution with the temperature of 62.5-64 DEG C, cooling for the third time, preserving heat, centrifuging, and collecting a precipitate; the nitrogen oxide reducing agent for the ship is produced by adopting the same production equipment as the nitrogen oxide reducing agent for the automobile, the problem of membrane pollution is not easy to occur in production, the production efficiency is high, the production input cost is low, the production energy consumption is low, and the prepared nitrogen oxide reducing agent for the ship meets the standard requirement.

The invention discloses a method for predicting and optimizing nitrogen oxide emission of an ammonia-hydrogen combustion chamber of a gas turbine, and the method comprises the steps: carrying out the data fusion and preprocessing according to the experimental data and simulation data of the nitrogen oxide emission of the ammonia-hydrogen combustion chamber; constructing a physical information neural network model; training a physical information neural network model according to the training data set; analyzing a chemical reaction path of the nitrogen oxide according to the physical information neural network model; and optimizing the characteristic parameters of the ammonia-hydrogen combustion chamber based on the path contribution degree according to the physical information neural network model. According to the method, the PINN model is established by utilizing experiment and simulation data, the conservation constraint and the reaction path constraint are set, so that the prediction precision of the model on the nitrogen oxide emission is improved, the efficiency and the physical interpretability of the model are improved, the contribution degree of the reaction path is quantified by utilizing the PINN model, the combustion characteristic parameters are quickly searched and optimized, and the efficiency and the physical interpretability of the model are improved. The calculation time is shortened, and the optimization efficiency of the emission prediction of the nitric oxide in the ammonia-hydrogen combustion chamber is improved.

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.

A system is described that enables the purification of COx, SOx, NOx, dioxin and furan, and H2S gases using wet and dry filters in a single chimney, comprising: a nozzle system (2) that sprays a mixture consisting of water, micronized zeolite, ammonia, and boron mineral in fine droplets to perform the first purification of SOx (sulfur oxides), NOx (nitrogen oxides), and COx (carbon oxides) gases entering the chimney (1) from the combustion gas, a zeolite-based dry filter (3) that purifies the dioxin and furan components in the flue gas (B) rising after the first purification, a first continuous measurement system (4) that measures the values of the combustion gas at the entry point to the chimney (1), a second continuous measurement system (5) that measures the values of the combustion gas after the dry filter (3), an Al-supported processor (6) that adjusts the amount of the mixture to be sprayed from the nozzle system (2) based on the comparison of the first continuous measurement system (4) and the second continuous measurement system (5).

The direct-fired machine comprises a direct-fired machine body, a combustor, a recycling assembly and a drainage assembly, the combustor is arranged on one side of the direct-fired machine body, the recycling assembly comprises a conveying pipe arranged on one side of the direct-fired machine body, a box body assembly is arranged at one end of the conveying pipe, a filtering piece is arranged in the box body assembly, and the filtering piece is arranged on the other side of the direct-fired machine body. A water collecting pipe is arranged at the bottom of the box body assembly and arranged at the air inlet end of the combustor. Through the design of the combustor, the conveying pipe, the box body assembly, the filtering piece, the water collecting pipe and the water draining assembly, the arranged combustor has a smoke recycling function, smoke exhausted by the direct-fired machine is recycled through the conveying pipe in the using process, dust and particulate matter in the smoke are filtered through the filtering piece, and the dust and particulate matter in the smoke are filtered through the water collecting pipe; and then the flue gas is conveyed into the combustor, so that the combustor sucks the air and the flue gas and mixes the air and the flue gas, the concentration of oxygen in the air per cubic meter is reduced, and finally emission of nitric oxide is reduced.

The utility model discloses a small nitrogen oxygen compound detection device of gas detection technical field, including mobile detection box, the inside one side of mobile detection box is installed with detection chamber, the outside wall center position of one side of detection chamber is installed with motor, and its structure is reasonable, the utility model discloses the mounting bracket on two groups of purification filter board is by the guiding seat with the sliding mode and is connected in the guiding groove on fixed base, and the mounting plate on fixed base is installed with the exhaust fan of corresponding installation up and down, according to the breather hole on detection chamber, make its air inlet on mobile detection box access to small nitrogen oxygen compound, and the exhaust fan extracts inward, to a certain amount, and the motor controls the baffle and seals the breather hole, reaches the partial small nitrogen oxygen compound existence detection chamber, and can be detected and handled by gas detection sensor, after the small nitrogen oxygen compound of detection is finished, and can be discharged by the exhaust fan to the air outlet.

This invention discloses a denitrification agent for low-temperature denitrification and its preparation method, belonging to the field of denitrification technology. The denitrification agent is prepared using diatomaceous earth as the matrix framework, compounded with calcium chloride, calcium bicarbonate, chitosan, sodium lignosulfonate, and TRIS (tris(hydroxymethyl)aminomethane). The components synergistically optimize the pore structure. Chitosan and sodium lignosulfonate achieve self-assembly through hydrogen bonding and electrostatic attraction. Nitrogen oxides are removed through a dual action of alkaline absorption and electrostatic adsorption. The TRIS can be regenerated and reused after alkali washing. This invention's denitrification agent solves the problems of high reaction temperature, poor low-temperature activity, low efficiency in removing low-concentration nitrogen oxides, and easy ammonia escape in traditional SCR denitrification technology, and can meet the requirements for NO removal in flue gas from power plants. x ≤15mg / m 3 It has ultra-low emission indicators, and features excellent low-temperature activity, high denitrification efficiency, and recyclability. It is suitable for denitrification treatment of low-temperature flue gas in power plants, etc.

The embodiment of the invention provides an ammonia spraying method and device for a photovoltaic glass kiln, electronic equipment and a storage medium, and relates to the field of flue gas treatment, and the method comprises the steps that a fire exchange signal of a target kiln is obtained, and a preset fire exchange control period is started with the fire exchange signal as a time reference; wherein each fire changing control period comprises a plurality of control stages, and each control stage is configured with a preset ammonia spraying adjustment parameter; in any control stage in the fire changing control period, kiln operation parameters at the inlet of the target kiln are obtained in real time; calculating to obtain theoretical pure ammonia demand quantity according to the kiln operation parameters in combination with preset target nitrogen oxide emission concentration; according to the theoretical pure ammonia demand quantity and the ammonia spraying adjusting parameters corresponding to the current control stage, target ammonia water flow is obtained through calculation; and controlling an ammonia spraying regulating valve to perform ammonia spraying operation according to the target ammonia water flow. According to the application, the ammonia spraying amount can be accurately controlled in a time-sharing and segmented manner according to the fire exchange working condition of the photovoltaic glass kiln, so that the denitration efficiency is improved.