2987 results about "Nitrogen oxides" patented technology

The invention relates to the technical field of industrial flue gas purification, and discloses a flue gas denitration pollution reduction and carbon reduction method and system based on model prediction control. The method comprises the following steps: collecting flue gas data through a sensor to obtain a flue gas distribution state; the state is processed through a preset model, and a nitrogen oxide concentration predicted value is determined; judging a regulation and control demand based on the predicted value and generating an adjustment coefficient sequence; calculating an opening value of an ammonia spraying distributor by adopting a particle swarm optimization algorithm, and determining ammonia spraying amount distribution; a control instruction is sent according to ammonia spraying amount distribution, and a temperature uniformity index is evaluated based on temperature feedback data; adjusting optimization algorithm parameters according to the indexes, and generating an optimized ammonia spraying strategy; updating the predicted value and determining the stable range of the denitration efficiency; verifying the ammonia escape concentration in the stable range to obtain a system performance index; and forming a continuous regulation and control sequence according to cyclic feedback of the indexes. According to the invention, accurate dynamic regulation and control of ammonia spraying amount are realized, denitration efficiency and system stability are effectively improved, and the risk of ammonia escape is significantly reduced.

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 provides a nitrogen oxide incineration equipment control method for drying carbonization, which comprises the following steps: acquiring combustion characteristic data of high-humidity sludge blocks in a fluidized bed incinerator, and extracting nitrogen oxide peak intensity, occurrence time, duration and peak shape steep degree to obtain a parameter set; real-time load data of the induced draft fan are obtained, the hearth negative pressure stability fluctuation range is analyzed in combination with the adjustment value, and if fluctuation exceeds a preset safety range, the load adjustment amplitude of the induced draft fan is calculated, and a load adjustment curve is generated; a multi-actuator cooperative control time sequence model is constructed based on the load adjustment curve and the adjustment value, the nitrogen oxide peak generation time and the duration are fused, the cooperative adjustment time sequence of secondary air supply and the draught fan load is calculated, and a control instruction is generated; and a control instruction is transmitted to a fluidized bed incinerator executing mechanism, the opening state of the tuyere and the air volume ratio are adjusted, the load of the induced draft fan is updated, and the adjusted hearth operation parameters are continuously monitored.

According to the dynamic traffic environment monitoring method and device provided by the embodiment of the invention, the mobile sampling of pollutants such as particulate matters, nitrogen oxides and carbon monoxide is realized by constructing a power-assisted bicycle environment monitoring and collecting network. And the cloud computing platform performs abnormal value identification based on time sequence clustering, constructs a pollutant concentration distribution model through a multivariate convolutional neural network, and generates diffusion trend prediction in combination with a pollutant migration model. And intelligent scheduling of monitoring resources is realized by adopting a deep reinforcement learning algorithm, and an optimized inspection scheme is generated according to the pollution risk level, the vehicle position and the electric quantity. According to the method, the defects of the traditional technology in the aspects of monitoring coverage, data analysis, resource scheduling and the like are effectively overcome, and the accuracy and the practical value of traffic environment monitoring are remarkably improved.

The invention discloses a small waste incineration full-automatic control system and method, and particularly relates to the technical field of solid waste treatment.The method comprises the following steps that waste throwing is recognized through infrared induction, a preheating device is started to heat a combustion chamber, and the heating intensity is adjusted in real time; when the temperature reaches a preset threshold value, the air volume, the feeding time and the combustion time are controlled according to the garbage type, and stable combustion is achieved; the concentration of carbon monoxide, nitric oxide and particulate matter in tail gas is monitored in the whole process, and combustion parameters are automatically adjusted when the emission limit value is close; after combustion is finished, slag is automatically discharged according to the amount of slag; meanwhile, temperature and emission data are collected and uploaded to a remote terminal, and full-process intelligent control and environment-friendly management are achieved; the whole-process automatic control is realized, and the manual dependence is reduced; combustion efficiency and adaptability are improved through an intelligent model; an emission prediction and feedback mechanism is introduced to ensure that the tail gas is environmentally friendly and reaches the standard, and the system stability and the intelligent level are enhanced.

The invention discloses a denitration system inlet nitric oxide disturbance and super-emission control method and system, and the method comprises the steps: adjusting the operation oxygen amount and the over fire air ratio in real time based on the measured values of the carbon monoxide concentration and the nitric oxide concentration of the denitration system inlet; based on denitration system operation data, combining actual sampling delay time to carry out sample data alignment and construct a training sample set; constructing a prediction model based on the training sample set, obtaining a nitrogen oxide concentration prediction value of the inlet of the denitration system through the prediction model, and updating the prediction model in real time; based on the difference between the average value of the outlet nitrogen oxide concentration of each partition and a set value and the difference between the concentration value of the nitrogen oxide at the outlet of the denitration system and the set value, and by combining the predicted value of the nitrogen oxide concentration at the inlet of the denitration system, treatment measures after the nitrogen oxide concentration super-emission are set in a segmented mode. The control performance of the denitration system can be improved, the ammonia spraying amount is reduced, the ammonia escape concentration is reduced, and the system automation input rate is increased.

The invention discloses a tail gas self-treatment low-emission zero-carbon ammonia hydrogen engine system and a control method, and the tail gas self-treatment low-emission zero-carbon ammonia hydrogen engine system comprises a pure ammonia flameless combustion ammonia decomposition system, a NOx decomposition system, an ammonia hydrogen engine, an air source and an ammonia gas source. The NOx decomposition system utilizes a thermal decomposition technology of nitrogen oxide to realize the reutilization of waste heat of combustion tail gas of the pure ammonia hedging type flameless combustion furnace and decompose the nitrogen oxide in the engine tail gas into nitric oxide, and the ammonia-hydrogen engine utilizes the combustion of the engine to do work, so that the tail gas of the pure ammonia hedging type flameless combustion furnace can be recycled, and the nitrogen oxide in the tail gas of the pure ammonia hedging type flameless combustion furnace can be recycled. Heat utilization of ammonia gas is achieved, and combustion-supporting tail gas needed by the pure ammonia opposite-flushing type flameless combustion furnace is generated.

The present invention relates to magnetic, catalytically active, and radiosensitizing nanoparticles (NanoXcats) and the method for their production. A method is disclosed for the production of functionalized greigite nanoparticles with a narrowband size distribution (10-30 nm) for use in multimodal cancer therapy. NanoXcats are superparamagnetic Fe3S4 nanoparticles whose surfaces are equipped with polar functional groups. The surface structures of NanoXcats are suitable for conjugation with, or for covalent or electrostatic binding of, active substances, which may be cancer drugs, cell growth inhibitors, or NO donors. Due to the EPR effect, NanoXcats are preferentially internalized by tumor cells. The targeted accumulation of NanoXcats in tumor tissue is achieved by an external inhomogeneous magnetic field. NanoXcats exhibit enhanced catalytic activity in tumor cells.The catalytic activity of intracellular NanoXcats can be triggered, controlled, and enhanced by low-dose X-rays. Surface-bound drugs are additionally activated in tumor cells by the catalytic activity of NanoXcats. NanoXcats act as superoxide dismutase, nitric oxide synthase, and Fenton catalyst. They catalyze, for example, reactions of the superoxide anion radical to hydrogen peroxide, of L-arginine to NO, and of hydrogen peroxide to the hydroxyl radical.

The invention relates to an SSZ-39 molecular sieve and preparation and application thereof.The preparation method comprises the following steps that 1, after water, an alkali source and a template agent are mixed, mesoporous Y zeolite and a silicon source are added, the mixture is stirred to be uniform, and the mixture is aged to be in a white gel shape; (2) transferring the obtained white gel into a reaction kettle, carrying out crystallization treatment, and filtering, washing, drying and calcining a crystallized product to obtain a Na-SSZ-39 molecular sieve; (3) carrying out ammonium ion exchange on the Na-SSZ-39 molecular sieve, filtering, washing, drying and calcining to obtain an H-SSZ-39 molecular sieve; and (4) carrying out copper ion exchange on the H-SSZ-39 molecular sieve, filtering, washing, drying and calcining to obtain the Cu-SSZ-39 catalyst. Aluminum used in the method is provided by mesoporous Y zeolite, the pure-phase SSZ-39 molecular sieve can be synthesized in a wide gel range, the crystallization time is shortened to 24 h, and after copper ion exchange, the pure-phase SSZ-39 molecular sieve shows high denitration activity in the selective catalytic reduction reaction of nitrogen oxide ammonia.

The invention provides a method for rapidly detecting the content of nitrogen oxides in air. The method comprises the following steps: acquiring original signal data of nitrogen oxides in air in a target detection area in real time through a plurality of nitrogen oxide sensors; performing noise reduction filtering processing on the original signal data to generate target signal data; performing signal drift compensation correction on the target signal data based on a preset sensor calibration model to generate standardized concentration data; performing space-time correlation analysis on the standardized concentration data through a nitrogen oxide concentration prediction algorithm model in combination with environment parameter data collected in real time to generate a target prediction concentration value; and comparing the target predicted concentration value with a preset concentration standard threshold value based on a fuzzy logic judgment algorithm, and constructing a detection report. The whole process from data acquisition to report generation is intelligent, and the detection flexibility is remarkably improved.

The invention discloses an efficient pulsating heat pipe air pre-heater gas stove, and relates to the technical field of gas stoves. The air pre-heater comprises an air pre-heater body, a pulsating heat pipe and an air supply pipeline, the pulsating heat pipe is embedded in an inner cavity of the air pre-heater body, and the bottom of the air pre-heater body communicates with the top of the air supply pipeline; the air pre-heater body comprises a heat insulation radiation cavity and an air pre-heating cavity. The heat transfer efficiency of the pulsating heat pipe is far higher than that of traditional metal heat conduction, heat of high-temperature flue gas can be rapidly absorbed, waste heat loss is reduced, the heat efficiency is improved, secondary air is heated through the air preheater, the temperature of the secondary air is increased, the combustion temperature is increased, gas combustion is more sufficient, emission of carbon monoxide and nitric oxide is reduced, and the energy-saving and environment-friendly effects are achieved. The pulsating heat pipe has the unique advantages of being small and exquisite in structure, flexible in arrangement and efficient in heat transfer, and the heat efficiency of the gas stove is effectively improved through the L-shaped pulsating heat pipe heat insulation air pre-heater structure.

The embodiment of the invention discloses a dynamic collaborative optimal selection control method for denitration of a garbage incinerator, and relates to the technical field of garbage incineration treatment. The method comprises the steps that operation parameters, collected in real time, of the garbage incinerator are obtained and preprocessed; based on the mechanism of waste incineration and denitration reaction and in combination with historical operation data, a dynamic model of the denitration process of the waste incinerator is established, and the denitration process is described by adopting an autoregressive moving average model; according to the preprocessed operation parameters and the established dynamic model, the working conditions of the garbage incinerator are recognized and classified in real time; multivariable model predictive control is adopted to make a cooperative control strategy; and outputting the formulated cooperative control strategy to execution mechanisms of the denitration system and the incineration system. According to the method, the denitration efficiency can be improved, nitrogen oxide emission can be accurately controlled, and the ammonia escape rate and the denitration cost can be reduced.

The invention relates to the technical field of flue gas purification, in particular to a nitrogen oxide and dioxin efficient synergistic removal and discharge system which comprises a pretreatment frame and an advanced treatment frame, the pretreatment frame is arranged at the upper end of the advanced treatment frame, and a removal mechanism, a transition air cylinder and an activated carbon storage cylinder are sequentially arranged in the pretreatment frame; local parts of the bottoms of the transition air cylinder and the activated carbon storage cylinder extend into the advanced treatment frame, and a reaction cylinder II is arranged in the advanced treatment frame and corresponds to the activated carbon storage cylinder up and down; the efficient synergistic removal of nitrogen oxides and dioxin is realized through the synergistic treatment of a two-stage layered structure, dynamic mixing deacidification and dynamic adsorption optimization, and meanwhile, the adaptability of equipment to complex working conditions is improved through an adjustable transmission assembly.

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a water-hydrogen combined supply internal combustion engine which comprises a first power generation unit driven by hydrogen and air combusted by a hydrogen internal combustion engine unit. The gas recovery unit converts water vapor in exhausted gas into liquid water through a condensation driving module and drives the second power generation unit at the same time; the fuel supply unit adjusts the hydrogen injection amount through a generated adjusting instruction based on multi-dimensional data detected by the monitoring unit and processed by the data processing unit and the confidence decision-making unit, and then generation of nitric oxide is inhibited. Condensate water recovery and combustion control of the hydrogen internal combustion engine are deeply combined, the actual exhaust humidity is reversely deduced by monitoring the flow of the condensate water, the gas detection error tolerance range is dynamically corrected, the hydrogen-oxygen combustion ratio judgment result is linked, safety amplitude limiting control over hydrogen fuel supply is achieved, and nitrogen oxide generation of the hydrogen internal combustion engine is reduced.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

A method of capturing carbon dioxide, including providing a particle containing magnesium oxide, calcium oxide, or a combination thereof; and providing a mixture gas to contact the particle, wherein the mixture gas includes water vapor, carbon dioxide, and nitrogen oxide, and the particle captures the carbon dioxide to form a carbonated particle and a treated gas. The mixture gas has a relative humidity of 25% to 95%, a nitrogen oxide concentration of 20 ppm to 2000 ppm, and a carbon dioxide concentration of 0.05% to 15%.

The invention discloses a low-emission gas-fired boiler combustion device and method, the low-emission gas-fired boiler combustion device comprises an air premixing assembly, a combustion assembly and a burnout assembly, the air premixing assembly communicates with the combustion assembly, and the combustion assembly communicates with the burnout assembly; the air premixing assembly comprises a mixing tank, a premixing chamber, an air inlet pipe, a fuel gas inlet pipe, a first air distribution plate, two limiting rings, a rotating shaft, mixing blades and a driving impeller; the air inlet pipe and the fuel gas inlet pipe are both installed on the lower surface of the premixing chamber. Fuel gas and air are premixed in the premixing chamber, then gas preliminarily mixed in the premixing chamber flows into the mixing tank to be secondarily mixed, the fuel gas can be evenly distributed in the main combustion chamber after being evenly mixed, and therefore the situation that the concentration of the fuel gas in a local area is too high or too low is avoided; the uniform fuel gas distribution enables the combustion process to be more uniform, and the condition that the temperature of part of flames is relatively high does not exist, so that the generation rate and the generation amount of nitrogen oxides are reduced.

The invention discloses a salt-containing waste gas and waste liquid incinerator system and a control method thereof.The system comprises a vertical incinerator, the vertical incinerator comprises a combustor and an incinerator body which are vertically arranged in sequence from top to bottom, and the combustor is connected with a waste liquid pipeline, a natural gas pipeline and a first waste gas pipeline; a secondary combustion-supporting air annular air bellow, a primary cooling air annular air bellow and a secondary cooling air annular air bellow are sequentially arranged on the furnace body part from top to bottom, and the upper area of the primary cooling air annular air bellow on the furnace body is an incineration area; the area between the upper area of the secondary cooling air annular air bellow on the furnace body and the primary cooling air annular air bellow is a primary cooling area; and the lower area of the secondary cooling air annular bellows on the furnace body is a secondary cooling area. According to the incinerator system, aiming at various waste gases and salt-containing waste liquids, the incineration system can be automatically controlled, molten salt blockage is avoided, nitrogen oxide emission during operation of the whole incineration system can reach 30 mg / Nm < 3 > or below, and energy conservation and environmental protection are achieved.

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 invention relates to the technical field of flue gas denitration, and discloses an efficient dust and nitrate integrated SCR denitration system and method in a high-temperature and low-dust environment. A lower high-temperature dust removal unit containing a gradient three-dimensional porous metal fiber filtering element and an upper SCR denitration reactor located at the downstream of the lower high-temperature dust removal unit containing a multi-layer vanadium-titanium honeycomb type catalyst module are arranged in the upper SCR denitration reactor; the ammonia spraying module sprays ammonia to the upstream or the interior of the SCR reactor; and the intelligent control module controls the ammonia spraying and dust removal unit to remove dust, comprises a catalyst characteristic identification sub-module, a working condition disturbance prediction sub-module and a collaborative optimization control sub-module, and realizes an optimization decision of a final ammonia spraying instruction. High-temperature dust removal and SCR denitration are integrated in the integrated box body, so that the compactness of the system structure is realized; front efficient dust removal provides a clean flue gas environment for the catalyst, the service life of the catalyst is effectively prolonged, and the denitration efficiency is guaranteed; and the intelligent control module ensures the accuracy and self-adaption of ammonia spraying operation, and the removal rate of nitrogen oxides and the operation economy are remarkably improved.

The invention discloses process equipment and method for high-temperature nitrogen-free sintered magnesia, and belongs to the technical field of high-temperature combustion of industrial kilns, and the process equipment is composed of a calcining kiln, a bag-type dust collector, an induced draft fan, a gas cooler, a gas mixer, a liquid oxygen storage tank, a gasifier, PLC control equipment and a high-pressure fan. The oxygen content in the mixed gas is controlled to be 21-25%, artificial nitrogen-free combustion-supporting air is obtained to replace air to complete sintering of magnesia, air is not used, 79% of nitrogen components in the air are prevented from entering a combustion system, discharged tail gas is reduced by more than 2 / 3, heat loss in smoke is reduced, nitrogen oxide is not generated, catalytic reduction denitration is not needed, and the production cost is reduced. As the flue gas does not need to be heated, the energy consumption cost is saved. The concentration of carbon dioxide in discharged flue gas can reach more than 90%, liquid carbon dioxide is prepared through pressurization, and waste is turned into wealth.

The invention discloses a coal mine safety information intelligent monitoring system applying an industrial internet, and relates to the technical field of intelligent monitoring. During operation of the system, multi-source data are collected from equipment and subjected to primary processing, and data from different sources are subjected to space-time matching and association by using a data fusion technology; and obtaining a coal mine safety information early warning index Yjzs after calculation, analyzing the stress change and risk of the underground rock stratum, and simulating and predicting the chemical risk in the mine by processing the hydrogen sulfide diffusion rate and nitrogen oxide concentration gradient data and adopting a computational fluid dynamics (CFD) chemical reaction rate model. And monitoring and evaluating behaviors of coal miners and operation conditions of equipment, comparing a coal mine safety information early warning index Yjzs with a preset warning threshold value M and a danger threshold value N, generating a corresponding strategy scheme according to a comparison result, and dynamically adjusting the threshold value to adapt to different mine conditions and safety standards.

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 combustor and gas equipment, and relates to the technical field of gas equipment. Wherein the burner comprises a fire grate and an injection device, and the fire grate is provided with an air inlet; the injection device is installed at an air inlet of the fire grate and provided with an injection channel and a fuel gas channel arranged outside the injection channel, the injection channel is provided with an air inlet end, an air outlet end and a fuel gas introduction port, the air inlet end of the injection channel is used for inputting air, the fuel gas introduction port is communicated with the fuel gas channel, the air outlet end of the injection channel is communicated with the air inlet, and the fuel gas introduction port is communicated with the fuel gas channel. The gas-air mixer is used for conveying gas-air mixture into the fire grate. According to the technical scheme, fuel gas and air can be mixed more sufficiently, sufficient combustion can be achieved, and emission of nitric oxide is reduced.

A method of capturing carbon dioxide, including providing a particle containing magnesium oxide, calcium oxide, or a combination thereof; and providing a mixture gas to contact the particle, wherein the mixture gas includes water vapor, carbon dioxide, and nitrogen oxide, and the particle captures the carbon dioxide to form a carbonated particle and a treated gas. The mixture gas has a relative humidity of 25% to 95%, a nitrogen oxide concentration of 20 ppm to 2000 ppm, and a carbon dioxide concentration of 0.05% to 15%.

The invention relates to the technical field of fire coal additives, in particular to a high-efficiency coal saving agent and a preparation method thereof. The coal saving agent is prepared from the following raw materials in percentage by mass: 7-14% of an oxygen supply agent, 5-12% of a combustion improver, 5-13% of a catalyst, 0.1-1% of industrial waste residues, 1-3% of a desulfurization additive, 1-2% of a dispersing agent and the balance of deionized water, wherein the catalyst is a Ce-Mn / TiO2 catalyst, and the catalyst is a TiO2 catalyst; the industrial waste slag is selected from at least one of cold-rolled iron oxide slag, nickel slag or steel slag; the desulfurization additive is selected from at least one of calcium acetate, calcium oxide or calcium carbonate. The coal-saving agent can effectively improve the combustion characteristic of coal, improve the combustion efficiency and the combustion effect, and realize the efficient coal-saving effect under the condition of low mixing amount; meanwhile, desulfurization and denitrification can be achieved, emission of sulfide and nitric oxide is reduced, and environmental pollution can be prevented and controlled.

To provide a control device and a control method for internal combustion engine which can perform control such that amounts of discharge of nitrogen oxide and ammonia satisfy limit values even when an environment condition changes.SOLUTION: A control device for an internal combustion engine includes: a nitrogen oxide acquiring unit for acquiring an amount of nitrogen oxide in exhaust gas discharged from the internal combustion engine; an ammonia amount acquiring unit for acquiring an amount of ammonia in the exhaust gas discharged from the internal combustion engine; and a flow rate control unit which gives a flow adjustment instruction to adjust a flow rate of combustion gas directed to the internal combustion engine, to a flow rate adjustment device which adjusts a flow rate of combustion gas introduced into the internal combustion engine, such that the nitrogen oxide amount acquired by the nitrogen oxide amount acquiring unit and the ammonia amount acquired by the ammonia amount acquiring unit do not exceed threshold values in a state where the internal combustion engine is being operated in a mixed combustion operation mode using both liquid fuel and ammonia gas as fuel.SELECTED DRAWING: Figure 1

The invention relates to the technical field of bypass ventilation denitration systems, and discloses an intelligent bypass ventilation SCR (Selective Catalytic Reduction) coupling SNCR (Selective Non-Catalytic Reduction) denitration system which comprises a smoke chamber, a cyclone cylinder, a precise ammonia spraying system, an air mixing chamber, a cooling fan, a cold air valve, a dust collection chamber, an SCR reactor, an exhaust fan, a chimney, a stock bin, a bin pump, a compressed air system and an intelligent control system, the air inlet is connected with the smoke chamber, and the feed opening is connected with the bin pump. Under any working condition, NOx emission at a chimney outlet can reach the standard, the ammonia water consumption is lowest, the denitration effect is good, the investment cost is low, the problem that NOx emission of the kiln tail chimney is unstable and prone to exceeding the standard is solved, the catalyst abrasion and blocking risk can be greatly reduced, the catalyst dosage is small, the maintenance cost is low, and the method is suitable for industrial production. And long-term stable operation of the system is realized.

The invention provides a multi-mode split hybrid propulsion system of a compact high-temperature fuel cell jet engine. The problems that a traditional aviation gas turbine engine is low in heat efficiency, high in oil consumption rate and high in nitrogen oxide emission amount are solved. The device comprises a propelling system, a transmission system and a lubricating system, the propelling system adopts parallel double shafts; the two connecting shafts can transmit power through a transmission system, so that two working modes of the ducted fan are realized; and the lubricating system feeds lubricating oil to all shaft systems on the shaft. The high-temperature solid oxide fuel cell system supplies power to the motor through the direct current conversion device, then the motor drives the ducted fan, and the total efficiency and the total thrust of the hybrid propulsion system are improved. The hydrogen-rich combustion chamber and the hydrogen-poor combustion chamber are additionally arranged on the structure, so that the problem that the high-temperature solid oxide fuel cell needs a heat exchanger with a complex pipeline to preheat fuel is solved.

The invention discloses a flue gas low-temperature denitration treatment device for environmental protection, and relates to the technical field of flue gas low-temperature denitration treatment. Comprising a shell, a rotating block is installed at the top end of the shell through a motor, a sleeve is arranged on the surface of the rotating block in a limiting sliding mode, an airflow adjusting assembly is installed at the top end in the sleeve, and a first through plate is installed on the inner wall of the shell and located below the sleeve. According to the invention, through the arrangement of the sleeve, the adjusting plate, the first through plate and the gas flow adjusting assembly, the flow velocity of gas in the shell can be increased, and the uniform distribution of flue gas in the denitration reactor is ensured, so that the full contact of atomized ammonia gas in a reducing agent and nitrogen oxides (NOx) in the flue gas is facilitated, and the phenomenon that the local concentration is too high or too low is reduced; the flow velocity of the flue gas is kept consistent, so that local temperature fluctuation or reactant retention time difference caused by uneven flow velocity can be avoided, and the denitration reaction is ensured to be carried out under the optimal condition.