601 results about "Low emission" patented technology

The invention discloses a ship carbon emission on-line monitoring method, device and equipment, and the method comprises the steps: building a comprehensive emission feature library through collecting infrared absorption spectrum, gas flow and other multi-source emission signals in a ship operation process; eliminating gas cross interference by adopting a spectrum separation analysis technology, and establishing a concentration inversion mechanism to generate an independent monitoring domain; high and low emission working condition modes are identified through working condition relevance evaluation, and intelligent allocation of monitoring resources is achieved; marine environment compensation nodes are established, layered temperature and humidity correction control is implemented, and environment-adaptive ship environment parameters are generated; the multi-stage early warning trigger time is determined by adopting an early warning threshold backward deduction analysis technology, a ship emission monitoring time sequence table and a graded monitoring instruction set are constructed, full-working-condition, all-weather and high-precision intelligent monitoring of ship emission is realized, and reliable technical guarantee is provided for ship environmental protection compliance and marine environmental protection.

The invention provides a PLC-based biomass gasification industrial steam full-automatic intelligent control system and method. The system comprises a data acquisition module, a modeling identification module, a multi-objective optimization module, a rolling prediction control module, a coordination execution module, a self-adaptive correction module and an abnormal fault tolerance and safety control module. The system collects operation data of a feeding system, a gasification furnace, a boiler, a steam-water system and an environmental protection system in real time through a PLC platform, a dynamic coupling model of a combustion side, a steam-water side and an environmental protection side is established, and a multi-target constraint optimization model with stable steam pressure, up-to-standard emission and minimum energy consumption as targets is constructed. According to the invention, unattended operation of the biomass gasification industrial steam system is realized, the system has the advantages of high control precision, low energy consumption, stable emission and strong fault-tolerant capability, and the intelligence and safety of the industrial steam system are obviously improved.

The invention discloses an air-fuel ratio control method for a high-pressure direct injection engine in a diesel-natural gas dual-fuel cylinder, and relates to the technical field of engine control, and the air-fuel ratio control method comprises the following steps: collecting diesel mass flow, natural gas volume flow and natural gas component data, and determining a diesel-natural gas mixing ratio; a basic target air-fuel ratio is obtained by combining the real-time rotating speed of an engine, the load and the diesel oil-natural gas mixing proportion; based on the pressure and temperature of the intake manifold and the rotating speed of the engine, the target air-fuel ratio after model correction is obtained; the working condition load change rate is detected, the pre-optimized air-fuel ratio trajectory MAP is called, and a transient correction target value is generated; calculating the deviation between the transient correction target value and the measured value of the air-fuel ratio sensor and the deviation change rate, and outputting an air-fuel ratio correction value; and the final target air-fuel ratio is calculated and sent to an air flow control valve to execute air inlet adjustment. The method is suitable for engine application scenes requiring high-precision and self-adaptive control to improve combustion efficiency and reduce emission.

The utility model provides an algal-bacterial symbiosis synergistic denitrification reaction device based on anaerobic ammonia oxidation, and relates to the technical field of wastewater treatment. The device comprises a reactor and a plurality of biological ribbons arranged in the reactor, a water inlet and a water outlet are formed in the two ends of the reactor respectively, the biological ribbons are vertically distributed in the reactor in the water flow direction and divide the reactor into a plurality of reaction spaces, and the two ends of the tops of the biological ribbons are fixed to the side wall of the reactor; and the height of the biological ribbon is lower than that of the reactor. The anaerobic ammonia oxidation-phycomycete symbiotic system is introduced into the reactor containing the biological ribbons, low-energy-consumption and low-emission treatment of low-C / N urban domestic sewage is achieved, the biological ribbons are selected as a loading material of the reactor, the interior of the reactor is provided with rich pore structures, and the biological ribbons are loaded on the reactor. A large amount of biological attachment surface area is provided for growth and reproduction of algae and other microorganisms in water, and a large amount of attachment sites and powerful growth conditions are provided, so that the sewage treatment effect is improved.

The invention relates to the technical field of engine control, in particular to an engine combustion control method, device and system based on double oil sprayers and a computer program product. Comprising the steps that when an engine enters a lean-burn working condition and meets a self-learning condition, self-learning of the injection starting angle and the excess air coefficient of an auxiliary oil injector is conducted; ignition advance angle self-learning of the auxiliary fuel injector is carried out; and fuel injection control over the auxiliary fuel injector is conducted on the basis of the injection starting angle, the excess air coefficient and the ignition advance angle obtained through self-learning. And when refined fuel oil control is carried out to achieve the optimal fuel consumption of the engine, the lowest NOx emission requirement under the lean-burn working condition of the engine is met.

The invention discloses a flue gas multi-pollutant cooperative treatment system, a treatment method and application, belongs to the technical field of flue gas purification, and aims to solve the technical problems of short service life and high flue gas requirement of a catalytic filter bag for flue gas treatment. In the treatment system, a catalytic filter bag is arranged in the integrated dust remover; the flue gas inlet section of the dry-process reactor is communicated with an oxidizing agent conveying module for conveying an oxidizing agent into the dry-process reactor, a deacidification agent conveying module for conveying a deacidification agent into the dry-process reactor and an activated carbon conveying module for conveying activated carbon into the dry-process reactor; and the flue gas outlet section of the dry-method reactor is communicated with a reducing agent conveying module for conveying a reducing agent into the integrated dust remover. Compared with the prior art, the process flow can be shortened, the occupied area of equipment is reduced, the power consumption and the consumption of consumables are reduced (economical efficiency), ultralow emission of pollutants (environment friendliness) is guaranteed, the modification cost is low, the service life of the catalytic filter bag is long, operation and maintenance are easy and convenient, and the energy utilization rate is high.

The invention discloses industrial solid waste treatment and resource utilization, and particularly relates to a washing-free sintering resource treatment method for household garbage incineration fly ash. Fly ash which is not washed with water, a silicon-aluminum hardening and tempering agent and solid fuel are mixed according to a specific proportion, granulated and sintered, and dioxin control and heavy metal directional migration are achieved through the temperature gradient of a material layer. According to the invention, low-temperature (1t, 150 DEG C) and low-pollution flue gas is shunted for common purification according to the temperature and component difference of flue gas at each sintering section, and dust (product dust) is returned for utilization; high-temperature (more than or equal to 150 DEG C) and high-pollution flue gas is divided for quenching and activated carbon deep purification, and dust (heavy metal concentrated ash) of the flue gas is sold for metallurgy. According to the invention, the fly ash washing link is thoroughly omitted, and the consumption of the adsorbent and the operation cost are greatly reduced while ultra-low emission is ensured through a flue gas quality-dividing and flow-dividing technology, so that low-cost, thorough harmlessness and high-value recycling of the fly ash are realized.

The invention discloses a strong premixing combustion chamber for restraining combustion noise based on a Helmholtz resonant cavity, and relates to the technical field of energy and power. Air and fuel enter the mixing cavity through corresponding connectors to be strongly premixed, premixed gas enters the hearth to be combusted through slit channels among water cooling channel branch pipes, a water cooling channel array can prevent backfire, the Helmholtz resonant cavity is connected with the hearth through a cavity neck and is provided with an air film cooling channel, the size of the Helmholtz resonant cavity needs to measure combustion noise, and a frequency spectrum is analyzed to obtain characteristic frequency. The neck length, the cross section area and the resonant cavity volume are calculated according to a Helmholtz resonance formula, and the sound absorption effect is verified in combination with a low-order thermoacoustic model. Combustion efficiency is improved through the strong premixing and slit water cooling design, tempering is prevented, NOx is reduced, the diffusion combustion problem is solved, the targeted design resonant cavity is matched with air film cooling, the defects that an existing silencing structure is large in size, poor in adaptation and low in high-temperature reliability are overcome, complex active control is not needed, cost is low, applicability is high, and the application range is wide. And cooperative control of high efficiency, low emission and unstable combustion is realized.

This invention discloses a centrally staged low-emission combustor head with a highly efficient backfire prevention structure, belonging to the technical field of low-emission combustor heads. It includes a pre-combustion stage component, a main combustion stage component, and a backfire prevention structure located between them. The pre-combustion stage component injects its internal fuel through a centrifugal nozzle, forming a solid cone-shaped atomization field. The main combustion stage component injects its internal fuel into the main combustion stage annular channel through a transverse fuel direct injection orifice, forming an annular atomization field that mixes with air in the first-stage radial cyclone separator of the main combustion stage to form a combustible premixed fuel-air mixture. The backfire prevention structure provides a backfire prevention air wall within the annular channel of the main combustion stage. The outlet of the backfire prevention air wall is located on the inner wall of the main combustion stage, and the angle between the outlet of the annular channel and the inner wall of the main combustion stage forms an acute angle, used to prevent the main combustion stage flame from extending upstream into the premixed fuel-air mixture. This invention effectively prevents backfire, thereby preventing safety hazards caused by backfire.

The invention discloses a low-load flue gas recirculation system for a circulating fluidized bed boiler. The low-load flue gas recirculation system comprises a hearth, and one end of a fifth pipeline is fixedly connected to the hearth; according to the invention, a part of flue gas is led out from the opening of the outlet flue of the induced draft fan and is introduced into the fourth pipeline, primary air heated by the first fan heater and the second fan heater is mixed, then pressurized by the first primary air fan and the second primary air fan and heated by the first preheater and the second preheater, and then enters a boiler air chamber; a dynamic parameter adjusting mechanism in the self-adaptive adjusting system adopts a feedforward-feedback composite control structure, the reheating steam temperature can be increased by about 2 DEG C every time the recirculation air volume is increased by 1%, the NOx concentration fluctuation is predicted in real time by applying an LSTM neural network, PID parameters are dynamically corrected through fuzzy reasoning, fuel characteristic changes are adapted, and the reheating steam temperature is increased by about 2 DEG C; and the amount of recycled flue gas is properly adjusted according to the load change to ensure that the unit is in the deep peak regulation load interval, and the unit operates to realize stable ultralow emission of NOx.

The invention provides a low-emission and wide-load coal-fired boiler system based on wall-type wind and ammonia-doped combustion, and the system comprises a combustion environment sensing module which is used for deploying a sensing equipment network and obtaining basic combustion characteristic parameters; the combustion state recognition module is used for carrying out flame stability index extraction, combustion trend prediction and fuzzy reasoning to obtain real-time working condition characteristics; the wall type wind configuration module is used for designing a wall type wind jet flow CFD simulation model and obtaining wall type wind optimal configuration parameters; the differential ammonia doping module is used for constructing an ammonia combustion chemical kinetic model and a three-dimensional mapping query table to obtain a differential graded ammonia doping scheme; the collaborative optimization module is used for comprehensively optimizing the wall type wind optimal configuration parameter differentiation grading ammonia doping scheme; and the performance evaluation module is used for comprehensive performance evaluation and equipment prediction maintenance. According to the invention, environmental data in the boiler can be sensed comprehensively, ultralow emission of pollutants such as NOX and the like is realized, the boiler is kept stable and reaches the standard under large-load fluctuation, and the safety, economic and environment-friendly values of boiler operation are improved.

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 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 application discloses a low-NOx ammonia fuel combustion system based on plasma combustion support X The generated staged ammonia gas combustion system comprises a high-frequency high-voltage power supply, a dielectric barrier plasma generator, a gas distribution system (a blower and an ammonia storage tank), a combustion chamber and a swirler; the dielectric barrier plasma generator comprises a high-voltage electrode, an insulating medium, a swirler and a ground electrode; and the gas distribution system comprises a blower and an ammonia storage tank. The application utilizes dielectric barrier to generate ammonia gas plasma discharge, reduces the difficulty of ammonia gas combustion and improves the stability of ammonia gas combustion; utilizes the swirler to generate rotating airflow and improves the combustion efficiency; utilizes ammonia gas staged combustion to further reduce NOx emission; and the ideal staged ratio is that the volume ratio of ammonia gas plasma to side wall ammonia gas is 20% (10%-30%), so that the ammonia gas plasma can be fully discharged, and the ammonia sprayed from the side wall can also be fully combusted.

The invention provides a flue gas desulfurization and denitrification ultra-low emission DCS control system, belongs to the technical field of flue gas purification, and solves the technical problems that an existing desulfurization and denitrification DCS control system cannot realize deep synergy of desulfurization and denitrification and cannot perform ultra-low emission with accurate prediction and efficient response. The system comprises a boiler, an SCR denitration reactor connected with a flue gas outlet of the boiler, and an air pre-heater fixedly mounted at an outlet of the SCR denitration reactor, wherein an outlet of the air pre-heater is fixedly connected with a dust remover. According to the invention, through the arrangement of the data acquisition assembly and under the action of the collaborative optimization assembly, the system realizes an ammonia escape feedforward-compensation mechanism, the negative coupling between the denitration control unit and the desulfurization control unit is broken, the blockage of ammonium bisulfate is effectively prevented, the reliability of the desulfurization control unit is improved, and the service life of the desulfurization control unit is prolonged. Data acquisition, working condition identification, prediction and energy efficiency optimization are integrated on a unified DCS platform, and closed-loop intelligent control from sensing to decision making to execution is realized.

The low-NOX-emission hydrogen-ammonia fusion micro gas turbine comprises a combustion chamber, a plurality of secondary air inlet holes are formed in the wall face of the combustion chamber, and the secondary air inlet holes are used for feeding part of compressed air and a first path of liquid ammonia fuel into the combustion chamber; a cracking chamber with a cracked gas outlet is arranged in the combustion chamber and located at one end close to the turbine, a catalyst is arranged in the cracking chamber, a second path of liquid ammonia fuel is fed into the cracking chamber, the second path of liquid ammonia fuel is cracked under the action of heat energy of the combustion chamber and the catalyst, and the second path of liquid ammonia fuel is fed into the cracking chamber. And obtained cracked gas enters the combustion chamber through the cracked gas outlet to be combusted. High-temperature flue gas generated by the combustion chamber is used as a heat source, ammonia is catalytically cracked in the combustion chamber of the gas turbine to generate hydrogen-rich mixed gas, the hydrogen-rich mixed gas is introduced into the combustion chamber to serve as a combustion improver, ammonia combustion flame is stabilized, NOX emission is reduced, and meanwhile stepped utilization of energy is achieved.

The invention discloses a forward development and optimization design method for an engine liquid fuel atomization system, and relates to the field of optimization of a spray combustion system.The forward development and optimization design method comprises the steps that a numerical simulation method is adopted to conduct spray simulation, and high-precision transient three-dimensional spray characteristics are calculated; sampling by using a scrambling Holton sampling method, and constructing an initial sample library; constructing an agent model and training to obtain a low-precision agent model; performing multi-objective optimization by using an NSGA-II genetic algorithm based on the model to obtain a Pareto frontier solution; adopting K-means clustering to classify Pareto frontier solutions, select a finite solution set and calculate prediction and simulation errors, if requirements are met, outputting a high-precision proxy model, otherwise, screening potential optimal sample points based on an expected improvement function, and adding the potential optimal sample points into a sample library for retraining; and on the basis of the high-precision agent model, according to the optimization target, structure parameters and injection parameters are reversely deduced. By comprehensively adjusting the structure and working condition parameters, the mixing quality of fuel and air is remarkably improved, the combustion efficiency is improved, and emission is reduced.

The invention discloses a preparation process and application of a photovoltaic solder strip precoating flux, and belongs to the technical field of energy conservation and environmental protection. According to the welding flux, polyurethane modified epoxy resin and photosensitive acrylate serve as matrixes, modified carbon quantum dots, a nano welding-aid active agent and a modified dicyandiamide curing system are introduced, fumed silica, polyether modified organic silicon, a titanate coupling agent, an antioxidant and a flatting agent are compounded, and high-speed dispersion, grinding and vacuum defoaming are conducted to obtain the welding flux. The obtained pre-coated flux forms a coating through precise coating, cross-linking curing is conducted under the UV-LED segmented photocuring and thermocuring conditions, the welding strength of a welding strip and the adhesive force of the coating can be remarkably improved, corrosion resistance is enhanced, VOC emission is reduced, and the pre-coated flux is suitable for large-scale production of efficient and long-life photovoltaic modules.

The invention relates to the field of combustion and waste gas treatment, in particular to an integrated low-NOx self-preheating combustion device. The system comprises a combustor, a controller, a heat exchanger and a waste gas purifier, the combustor provides combustion air and fuel gas for a combustion chamber, the controller ignites mixed gas, the waste gas purifier recycles and purifies waste gas, the heat exchanger preheats the combustion air, and the invention further relates to specific structures and connection modes of various components. According to the device, the technical effects that the heat in the waste gas is effectively recycled to preheat the combustion-supporting air while the kiln is heated, the energy utilization rate is increased, NOx in the waste gas is reduced into N2 and O2 through the purification filter element, and NOx emission is reduced are achieved.

The utility model relates to a thick-thin separation ultra-low emission desulfurization system which comprises a thick tower, a thin tower, a thick liquid circulating pool and a thick liquid circulating pump which are communicated with one another, concentration towers and dilution towers with the corresponding number are correspondingly arranged, one concentration tower corresponds to one dilution tower, a plurality of concentration towers and a plurality of dilution towers are parallel, discharged liquid of all dilution towers enters the same concentrated liquid circulating pool, and concentrated liquid of all concentration towers also enters the same concentrated liquid circulating pool. Gypsum slurry is uniformly discharged from the concentrated liquid circulating pool by a gypsum discharge pump to a public gypsum dehydration system for dehydration; according to the utility model, SO2 in boiler flue gas is eluted by connecting the thick tower and the light tower in series, a plurality of boilers share one thick liquid circulating pool, and a thick-thin separation state of high concentration and low PH value of thick tower slurry and low concentration and high PH value of light tower slurry is kept during operation, so that desulfurization is efficiently graded from the source, the generation concentration of particulate matters in the desulfurization tower is reduced, and the desulfurization efficiency is improved. The method has the advantages of high desulfurization efficiency, low desulfurization agent consumption and the like.

The present application relates to an electron emission cooling thermal protection material and a preparation method and application thereof, and belongs to the technical field of composite materials, and solves the problem that the existing electron emission cooling thermal protection material cannot consider low emission work and high conductivity. The present application provides a preparation method of an electron emission cooling thermal protection material, ceramic matrix powder and conductive reinforcing phase material are homogenized and mixed, then densification forming and high reduction heat treatment are performed to obtain a composite material with a continuous conductive network. The electron emission cooling thermal protection material prepared by the preparation method has excellent comprehensive performance, the emission work is not higher than 3.5 eV, the conductivity can be up to 4.72*10 ‑2 S / m, and is not prone to performance degradation in a high-temperature oxidation environment. After heating and oxidation treatment of the material in air at 1600 DEG C, the emission work decreases by not more than 15% and the conductivity decreases by not more than 10% after 5 minutes of oxidation treatment, and the electron emission cooling can be realized efficiently and sustainably in a severe environment.

The invention relates to the field of gas turbines, in particular to a gas turbine combustion chamber air flow regulating valve which is arranged between a combustion chamber outer casing and a flame tube and comprises a regulating unit and a communicating unit, and an inner channel of the communicating unit is communicated with an air inlet of the flame tube in a sealed mode. A transmission space pointing to the flame tube from the outer casing side of the combustion chamber is formed, the flux of the transmission space is controlled by the adjusting unit to be adjusted by the communicating unit, the communicating unit comprises a valve flange connected to the flame tube, and the other end of the valve flange is fixedly connected with a valve switching section. The end, away from the valve flange, of the valve switching section is fixedly connected with the air inlet flow channel. The air distribution proportion in the combustion chamber can be actively adjusted according to the working condition change of the gas turbine, different combustion requirements under high and low working conditions are met, and the stable working boundary of the low-emission combustion chamber is effectively widened.

This invention relates to a method and system for precise ammonia injection, belonging to the field of flue gas denitrification technology. The method first obtains the performance parameters of the SCR catalyst, establishes an automatic control model including normal and abnormal operating conditions, then selects overall or zoned control of the ammonia injection grid based on the flue gas flow field distribution, calculates the ammonia injection rate by combining inlet flue gas data and catalyst parameters, and performs closed-loop feedback adjustment of the ammonia injection rate using outlet flue gas data. The system includes an automatic control model, a data detection and collection system, a control system, and an ammonia injection grid. The data detection and collection system adopts in-situ rapid measurement technology, which can collect inlet and outlet flue gas parameters in real time. This invention can precisely control the ammonia injection rate, reduce ammonia slip, reduce ammonium salt formation, extend the service life of the catalyst and equipment, and stably meet the ultra-low emission requirements of flue gas.

The application discloses a multi-layer dispersion combustion, high-efficiency energy-saving yellow phosphorus tail gas low-nitrogen burner and a multi-stage combustion method, and belongs to the technical field of energy saving and environmental protection. The mounting flange of the burner is connected with a furnace chamber. The burner comprises a cylinder body, the cylinder body is divided into a fuel cavity and a combustion-supporting cavity which are relatively independent through a transverse partition plate, the fuel cavity is used for conveying yellow phosphorus tail gas, and the combustion-supporting cavity is used for conveying high-pressure and high-speed combustion-supporting air. A center gun is arranged at the center of the cylinder body, an inlet end of the center gun is communicated with the fuel cavity, a plurality of layers of spray gun pipes are arranged, nozzles of a part of the spray gun pipes are staggered in height, and the nozzles of the spray gun pipes are oriented in different directions; a part of the spray gun pipes are provided with rotating blades; an air automatic rotating assembly is arranged at the outer periphery of an outlet end of the center gun and is communicated with the combustion-supporting cavity, and the air automatic rotating assembly is used for automatically and rapidly rotating the combustion-supporting air, so that the combustion-supporting air and the yellow phosphorus tail gas are fully mixed. The application solves the problems of yellow phosphorus tail gas ultra-low NOx and CO emission and yellow phosphorus tail gas blockage.

The utility model discloses a natural ventilation burner of a multi-layer small injection structure. The natural ventilation burner comprises an outer-layer fuel gas channel, a central fuel gas channel, a combustion-supporting air channel and a backflow flue gas channel. According to the utility model, the gas injection structure which is finely and dispersedly arranged is taken as a core, the gas injection structure is divided to be smaller and more dispersedly, flue gas and combustion-supporting air are respectively injected by gas at different positions, and the combustion organization is optimized and the temperature of a reaction area is homogenized in a manner of reducing the injection structure and performing multi-point dispersive arrangement, so that the combustion efficiency is improved. Safe and sufficient combustion under the natural ventilation condition is achieved, and meanwhile low NOx emission is kept.

The utility model discloses an integral dust removal system for a workshop, which relates to the technical field of dust removal and comprises a dust collection pipeline, a bag-type dust remover, an air compressor, an induced draft fan, a spray tower and an exhaust pipeline, the dust collection pipeline is connected into a plurality of stations, an air inlet of the bag-type dust remover is connected with the dust collection pipeline, and the air compressor is communicated with the bag-type dust remover through a pipeline. An air inlet of the induced draft fan is communicated with an air outlet of the bag-type dust collector through a pipeline, an air inlet of the spray tower is communicated with an outlet of the induced draft fan through a pipeline, and the exhaust pipeline is communicated with an air outlet in the top of the spray tower through a pipeline. According to the utility model, cloth bag dust removal and spray tower dust removal are carried out in sequence, high-efficiency dust removal and deep purification can be realized through graded purification, the ultra-low emission requirement is met, and gaseous pollutants are removed at the same time; the system stability is improved; and dust escape and secondary pollution are prevented. The included angle between the dust collection pipeline and the horizontal plane can prevent smoke dust from accumulating in the pipeline due to horizontal laying of the pipeline.

The invention discloses a pre-combustion chamber charge adjusting jet flow flame ignition combustion system, and relates to the technical field of internal combustion engines. The ignition device is arranged on an engine cylinder cover and can extend into the main combustion chamber, and a pre-combustion chamber and a charge adjusting valve are arranged on the ignition device; fuel can be fed into the pre-combustion chamber and the main combustion chamber. The injection end of the pre-combustion chamber extends into the main combustion chamber, and the charge regulating valve can be closed along with the increase of gas pressure in the main combustion chamber so as to separate the main combustion chamber from the pre-combustion chamber, and can also be opened under the action of gas pressure generated by combustion in the pre-combustion chamber so as to communicate the main combustion chamber with the pre-combustion chamber; according to the pre-combustion chamber charge adjusting jet flame ignition combustion system, the charge entering the pre-combustion chamber from the main combustion chamber is adjusted, ignition of the pre-combustion chamber is controlled, jet flame energy is improved, lean combustion of fuel and air is achieved in the main combustion chamber, the heat efficiency of an internal combustion engine is further improved, and NOx emission is reduced.

The application relates to the technical field of infrared stealth, precise thermal control and electromagnetic compatibility, and particularly discloses a film system structure with visible ultra-high reflectivity, middle-infrared and far-infrared low emissivity and microwave high permeability; the medium stack layer has high reflectivity to visible light; the metal microstructure layer has low emissivity to middle-infrared and far-infrared light and high permeability to microwaves; the film system structure has visible light reflectivity greater than 60%, middle-infrared and far-infrared light emissivity lower than 30% and microwave permeability higher than 60%. The application realizes perfect compatibility of infrared stealth and microwave absorption, keeps infrared low emissivity (epsilon < 0.1) and realizes high permeability (greater than 95%) to 1-18GHz microwave bands. The application solves the thermal failure problem of the composite stealth structure, realizes average visible light reflectivity (greater than 95%) through the medium stack layer, greatly reduces the solar heat load and improves the overall optical performance.

The invention provides a rotational flow combustion device capable of achieving low NOx emission, a combustion method and a volume flow calculation method.The rotational flow combustion device capable of achieving low NOx emission comprises a low-temperature cracking area, a rotational flow premixing cavity, a high-temperature catalysis area and a tail gas exhauster which are sequentially arranged in the airflow direction; the top of the low-temperature cracking area is connected with the bottom of the rotational flow premixing cavity, the top of the rotational flow premixing cavity is connected with the bottom of the high-temperature catalytic area, and the top of the high-temperature catalytic area is connected with the bottom of the tail gas discharger; the low-temperature cracking area is used for pre-cracking the input combustible ammonia-doped mixed gas; the rotational flow premixing cavity is used for generating rotational flow gas and generating a backflow area in the high-temperature catalytic area; the high-temperature catalysis area is used for catalyzing combustion flames in the flowing channel and on the wall surface; and the tail gas discharger is used for discharging the combusted tail gas. And by combining the catalytic pre-cracking and catalytic combustion technologies, the combustion effect is improved, and the emission of NOx is reduced.