42results about How to "Increase burn rate" patented technology

The invention discloses a static forest fire risk assessment method and system based on multi-source data and a remote sensing technology. The method comprises the following steps: establishing an index system of a target area and carrying out data acquisition; the collected data are preprocessed; calculating influence factors and index weights by using the preprocessed data, determining spatial and temporal distribution of calculation results of different influence factors, and calculating a comprehensive factor result by using each single influence factor according to a set weight; and evaluating the forest fire risk based on the obtained comprehensive factor result, and realizing dynamic monitoring of the forest fire risk value. According to the method, the accuracy and the real-time performance of forest fire space-time risk prediction are improved; and theoretical support is provided for follow-up forest fire risk prevention and control of electric power companies.

The invention discloses a grate-rotary kiln pellet process biomass-hydrogen-based fuel gas composite heat supply method, which comprises the following operation steps A, B and C in a grate-rotary kiln pellet production process: A: mixing biomass charcoal and a pellet material for pelletizing; b, the biomass solid fuel and the hydrogen-based fuel gas are injected into the rotary kiln at the same time; and C, fuel gas and / or air are / is injected to the joint of the chain grate machine and the rotary kiln head so as to regulate and control the oxygen content and temperature of the flue gas of the second preheating section. According to the method, under the condition that normal production of the pellets is not affected, due to the fact that a renewable, clean and low-carbon fuel structure is fully adopted, the number of CO2 and gas pollutants generated by combustion of fossil fuel is remarkably reduced.

The invention discloses a liquid catalyst and a coal combustion efficiency improvement detection system thereof, and belongs to the technical field of coal chemical industry, the catalyst comprises active metal ions and other combustion performance adjusting substances, the activation energy of coal combustion can be reduced, and the combustion rate can be improved. Furthermore, according to the use requirement that the characteristics of all coal types are matched with the adaptability of the catalyst, in order to further optimize the proportion of all formulas of the catalyst, the invention provides a detection system for improving the coal combustion efficiency of the catalyst, the detection system comprises a plurality of test chambers, and the coal combustion efficiency of the catalyst is improved by accurately adjusting the test environment of the coal powder and the catalyst. According to the method, a high consistency test is provided, and a batch circulating test is adopted, so that the improvement effect of the catalyst on combustion of different coal types is quickly and efficiently verified, and the optimal proportion value of each component in the catalyst to a specific coal type is determined.

The invention relates to a blast furnace coal injection optimization control method based on injection speed comparison and a blast furnace coal injection system, which are characterized in that based on blast furnace coal injection process requirements, logic design is carried out on remote automatic coal injection control requirements, and the opening degrees of a fluidizing valve and a gulp valve are automatically adjusted, so that the coal injection quantity required by a uniform injection blast furnace is met; the pulverized coal combustion rate and the molten iron quality are improved. A centralized control function picture is developed, a one-key input automation mode is achieved, and meanwhile the actual coal injection amount is monitored in real time. The blast furnace coal injection system is additionally provided with a safety early warning mechanism, alarm reminding is carried out when the air supply flow and the tank pressure exceed an early warning line, and the system safety is greatly improved.

The present application belongs to the technical field of internal combustion engine, and particularly relates to a kind of alcohol hydrogen fusion engine precombustion chamber system and its control method.Alcohol hydrogen fusion engine precombustion chamber system includes the engine main body with the main combustion chamber and precombustion chamber being communicated with each other, and also includes methanol supply unit, hydrogen production unit, hydrogen delivery control unit, exhaust gas recirculation unit and main control unit;Main control unit collects engine operating parameters and judges current working condition, and adjusts methanol supply path, hydrogen supply path, precombustion chamber working mode, hydrogen production unit heating mode and on-off state of exhaust gas recirculation unit according to working condition.The present application can realize engine full-condition combustion performance optimization without complex auxiliary device, and also considers cold start reliability, high and low load combustion stability and operation energy efficiency, to improve the whole machine operation reliability and transient response capability.

The utility model provides a heating device for detecting the distillation range of crude benzene in a laboratory, which comprises a combustion head provided with a gas spray hole and a gasification pipe arranged above the combustion head, the input end of the gasification pipe is communicated with a liquid storage bottle with a pump through a main liquid supply pipe, and the output end of the gasification pipe is connected with a gas inlet of the combustion head. The combustor is characterized in that a pre-combustion disc is arranged on the periphery of the combustion head, the pre-combustion disc is communicated with the liquid storage bottle with the pump through a secondary liquid supply pipe, and a gas pressurization assembly is arranged in the combustion head. The gasification pipe is firstly heated through heat energy generated by combustion of fuel on the pre-combustion disc, so that the gasification pipe has good gasification capacity in the initial combustion stage of the combustion head, the problem that the initial distillation time is difficult to control due to insufficient heat value in the initial stage is effectively solved, and the combustion rate is improved by arranging the fuel gas pressurization assembly in the combustion head; the distillation speed required by crude benzene distillation can be quickly achieved, and the accuracy of crude benzene distillation range detection is ensured.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

The utility model relates to the technical field of cigarette combustion cone falling detection, and discloses a cigarette combustion cone falling detection device. The detection device comprises a detection assembly (1), an exhaust fan (204), a cigarette holder (303) and a camera (305). The detection assembly (1) comprises a box body and an infrared distance sensor (102); the cigarette holder (303) and the infrared distance sensor (102) are located in the box body, and the infrared distance sensor (102) is configured to test the length of a cigarette in the box body; the camera (305) is mounted at the top of the box body and is used for shooting the combustion condition of the cigarettes in the box body in real time; the exhaust fan (204) is in airflow communication with the cigarette holder (303) to extract smoke generated by cigarette combustion. According to the application, a to-be-detected cigarette can be mounted on the mounting block through the mounting pipe and the cigarette holder, the combustion rate of the cigarette can be accelerated through suction force generated by the exhaust fan, and the falling of a cigarette combustion cone can be quickly detected in cooperation with the camera and the infrared distance sensor.

This invention discloses a graphene oxide / carbon nanotube-based coal combustion catalyst, its preparation method, and its applications, belonging to the field of catalytic combustion technology for efficient coal utilization. First, graphene oxide is used as a carrier, and then carbon nanotubes and manganese oxide are grown on its surface in a one-step process using condensation and redox reactions, followed by co-firing with coal. The graphene oxide / carbon nanotube-based combustion catalyst prepared by this invention effectively improves combustion efficiency, reduces the ignition temperature of coal, and lowers the reaction activation energy, resulting in significant economic benefits and broad application prospects.

The present invention belongs to the field of coal energy technology, and in particular to a catalytic improver for raw coal combustion, which is composed of a mixture of metal oxides, iron-containing compounds, metal carboxylates, alumina, rare earths and water, and is characterized in that: the metal oxides include Al 2 O 3 , Fe 2 O 3 , Fe 3 O 4 and MnO 2 ; Iron compounds include FeCl 3 and FeCl 2 ; Metal carboxylates include Mg(CH 3 COO 2 and Na 2 C 2 O 4 ; Alumina is Al 2 O 3 ·3H 2 O; rare earth is La(NO 3 ) 3 The present invention can effectively improve the combustion characteristics of coal, greatly improve the reactivity and combustibility of coal, thereby improving the combustion efficiency of raw coal, reducing energy consumption, and effectively reducing SO in exhaust gas. 2 , CO, and NOx contents, thereby achieving the effect of energy conservation and emission reduction. During boiler operation, the boiler thermal efficiency is increased by 3.11%-3.98%, and the coal saving rate reaches 4-12%, which has good economic benefits.

The present invention relates to a flipping mechanical grate for garbage incineration treatment, which discloses that a fixed beam is installed on a grate frame, a movable beam is installed on the side of the fixed beam, grates are installed on the fixed beam and the movable beam, a window is arranged on the grate of the fixed beam, a flipping grate sheet is installed in the grate window, a grate sheet shifting rod is installed on the grate frame below the fixed beam, the top of the grate sheet shifting rod is hinged with the bottom of the flipping grate sheet, a grate sheet transmission shaft is installed on the grate frame through a bearing seat, one end of the grate sheet transmission shaft is connected to the grate sheet shifting rod, and the other end is installed with a grate sheet swing arm; a grate sheet hydraulic cylinder is installed on the grate frame, and the telescopic end of the grate sheet hydraulic cylinder is hinged with the bottom of the grate sheet swing arm. The advantages of the present invention are that it is suitable for high-moisture garbage water combustion treatment, the garbage is flipped during the combustion process to improve the combustion condition, so that the garbage is fully and completely burned, and the burnout rate is improved, which has a positive effect on the volume reduction and resource utilization of garbage incineration treatment.

The present invention relates to the technical field of coal-fired power generation boilers, and specifically to a high-efficiency preheating type coal-fired power generation boiler, comprising a boiler body, a coal mill for preparing coal powder, a burner for burning coal powder to heat the inner cavity of the boiler body, an air preheater arranged at the tail end of the flue of the boiler body for collecting flue gas heat, and a heat mixing device for secondary drying and heating the coal powder prepared by the coal powder machine, wherein the coal mill is connected to the burner through a coal powder pipeline, the coal mill is connected to the air preheater through a hot air pipeline, the heat mixing device is arranged in the coal powder pipeline, and the hot mixing device introduces the hot air in the hot air pipeline into the hot mixing device through a hot air branch pipe to perform secondary drying and heating on the coal powder flowing through the coal powder pipeline. The present invention utilizes the hot air generated by the air preheater to perform secondary drying and heating on the coal powder, thereby improving the combustion rate of the coal powder in the boiler.

The invention discloses a multi-time ignition module capable of adjusting the ignition energy level and a multi-time ignition control method. The multi-time ignition module comprises a power supply module, an ECU input signal processing module, a primary current sampling module, a secondary voltage sampling module, an MCU processing module and an ignition IGBT. According to the multi-time ignition control method, in one ignition control period, after an ignition control signal sent by an ECU is received, whether multi-time ignition is started or not is judged firstly, if not, only single-time ignition is executed, and if yes, whether energy-level-free control multi-time ignition or energy-level-adjustable multi-time ignition is executed continues to be judged. In the energy-level-adjustable multi-time ignition mode, the control signals of the corresponding levels are output to the ignition IGBT according to the different stages of the T2 pulse width parameter so as to control the primary side current of the ignition coil, and then the ignition coil can conduct different-energy-level control during multi-time ignition, so that the fuel oil combustion rate is increased, tail gas emission is reduced, the engine power is improved, and the energy-level-adjustable multi-time ignition mode is achieved. The service life of the ignition coil is prolonged.

This invention discloses a direct injection mixing intake structure for an LNG gas engine, comprising a multi-point injection module. The multi-point injection module includes a guide vane, an intake manifold, a mixer, and nozzles. The intake manifold is connected to the guide vane, the mixer is located in the intake channel of the intake manifold, and the nozzles are mounted on the guide vane and connected to the mixer. Several sets of guide vanes from the multi-point injection modules are sequentially connected in series to form a gas passage. The nozzles of each set of multi-point injection modules inject the gas from the gas passage into the mixer of their respective multi-point injection module, where it mixes with air supplied to the intake manifold of that multi-point injection module to form a mixed gas. Each set of multi-point injection modules corresponds one-to-one with each cylinder of the gas engine, effectively ensuring that the mixed gas drawn into each cylinder maintains a uniform and stable air-fuel ratio.

The invention relates to an alkylation modified carbon-based solid waste coupling direct combustion method, which comprises the following steps: firstly, mixing carbon-based solid waste powder and a tetrahydrofuran solvent, pretreating the carbon-based solid waste powder, introducing N2, stirring for 30 minutes, slowly adding a tetrahydroammonium hydroxide aqueous solution, adding 1-bromobutane, and carrying out alkylation reaction, the method comprises the following steps: adding a tetrahydrofuran solvent into carbon-based solid waste powder, grafting an alkyl group on a functional group on the surface of the carbon-based solid waste powder, adding a diluted hydrochloric acid aqueous solution until the mixed solution is neutral, removing the tetrahydrofuran solvent in the alkylation reaction process by using a rotary evaporator so that only the carbon-based solid waste powder and a reaction product thereof remain in the solution, adding a methanol aqueous solution, and carrying out Soxhlet extraction to obtain the carbon-based solid waste powder. The carbon-based solid waste powder is subjected to vacuum drying, the collected carbon-based solid waste powder subjected to surface alkylation modification and primary air are introduced into a hearth through a combustor to be directly combusted, the combustion temperature is 1500 DEG C, the retention time in the furnace is 2 s, and the advantages of efficient combustion and low nitrogen emission can be achieved.

This invention provides an oxygen supply mechanism for a pulverized coal combustion device, comprising an oxygen-enriched channel, a central body, and a control component. One end of the oxygen-enriched channel is a nozzle extending through the pulverized coal channel, while the other end is located outside the pulverized coal channel and connected to an oxygen evaporation device. The nozzle includes a gradually expanding section that points outward along the axial direction of the nozzle, with its inner diameter gradually increasing. The central body is adjustable within the nozzle along its axial direction, forming an annular flow channel between the central body and the inner wall of the nozzle. One end of the control component is connected to the central body, and the other end extends to the outside of the pulverized coal channel. This oxygen supply mechanism allows for adjustment of the annular flow channel area by changing the position of the central body, enabling flexible control of the oxygen flow rate. This ensures optimal mixing of pulverized coal and oxygen under different load conditions and pulverized coal concentrations.

The utility model relates to the technical field of pulverized coal combustion, and discloses a device for improving the combustion rate of pulverized coal in a kiln, which comprises a main body mechanism. By arranging the flange connector, the device can be connected with an external pulverized coal storage device through the flange connector, so that pulverized coal can flow into the preheating cylinder through the conveying cylinder by means of the flange connector, the heater is started to release heat, and the heat is transmitted out from the heating port and penetrates through the filter screen to fill the whole preheating cylinder; at the moment, a motor is started, a rotating shaft rotates through the motor, and a shaft rod and a spiral blade which are connected with the rotating shaft are driven to rotate through rotation of the rotating shaft, so that the pulverized coal in the preheating cylinder is stirred, and when the pulverized coal is stirred, heat transmitted from a heating port can uniformly act on the surface of the pulverized coal, so that the pulverized coal is uniformly heated; and after the pulverized coal is preheated, the threaded bolt below the preheating cylinder is screwed out, and the pulverized coal can naturally flow out of the discharge port due to the pointed cone shape of the preheating cylinder.

The present invention discloses a hydrogen-oxygen mixed gas generating device, which comprises a box body and a gas generating system arranged in the box body, wherein the gas generating system comprises a water tank and a plurality of electrode plates arranged close to one side of the water tank, an insulator is arranged between each two of the electrode plates, one side of the water tank and the plurality of electrode plates are each provided with at least one gas flow hole and at least one liquid flow hole, the gas flow holes of two adjacent electrode plates are arranged staggered with each other and the liquid flow holes of two adjacent electrode plates are arranged staggered with each other, the liquid flow holes are connected to the water tank and each of the electrode plates to form an electrolyte channel, and the gas flow holes are connected to the water tank and each of the electrode plates to form an oxygen channel. The present invention can increase the combustion speed of fossil fuels, help fossil fuels burn, and effectively reduce the emission of nitrogen oxides and carbon dioxide during combustion.

The utility model relates to the field of kitchen utensils, and particularly discloses a pot support and a kitchen range. The pot support comprises an energy gathering ring, an energy gathering cover and a corner piece; the energy-gathering cover is arranged on the inner peripheral side of the energy-gathering ring, the energy-gathering cover comprises an annular plane part, the annular plane part extends from the inner peripheral surface of the energy-gathering ring to the inner peripheral side of the energy-gathering ring, the energy-gathering cover is detachably connected to the corner piece, the cooker comprises the pot support, and the pot support is placed on the cooker through the lower supporting leg of the corner piece. The pot support is beneficial to improving heat exchange with the pot bottom and improving the combustion rate, and the energy gathering cover is detachable and convenient to clean.

The application discloses a cutting synergist for liquefied petroleum gas and a preparation method thereof, and belongs to the technical field of cutting synergists. The cutting synergist is prepared by mixing the following components with the mass content: an alkyl ferrocene mixture 5-8%, n-octane 6-10%, ethylene glycol monoethyl ether 8-10%, isooctyl nitrate 10-15%, acetone 15-25%, and 200# solvent oil 25-45%. The application is a high-efficiency energy-saving synergist for cutting liquefied petroleum gas, and the performance of the liquefied petroleum gas after the addition of the synergist can reach and exceed the cutting performance level of the original petroleum gas and acetylene gas, and the liquefied petroleum gas can completely replace acetylene gas, natural gas and pure propane to be used as industrial gas for metal cutting. The product performance exceeds that of natural gas, industrial propane and the same kind of synergists on the market, and has a wide application prospect, and is a great breakthrough of industrial gas in the industrial field of China.

The invention discloses a method for improving the burning rate of an end-combustion solid propellant. The method comprises the following steps: preparing a pure silver mesh belt; cutting the prepared pure silver mesh belt to obtain a rectangular strip-shaped pure silver mesh belt; the rectangular strip-shaped pure silver mesh belt is pretreated; embedding the pretreated rectangular strip-shaped pure silver mesh belt into the end combustion solid propellant in the direction perpendicular to the combustion surface; and after demolding, shearing and removing redundant pure silver mesh belts at the two ends of the end-combustion solid propellant to obtain the end-combustion solid propellant embedded with the pure silver mesh belts so as to improve the combustion speed of the end-combustion solid propellant. According to the method, the pure silver mesh belt is embedded in the end-combustion solid propellant, the area of a rapid heat dissipation path is increased, and heat is transferred from a combusted part to an uncombusted part, so that the combustion surface of the end-combustion solid propellant is enlarged, the combustion speed of the end-combustion solid propellant is increased, and the service life of the end-combustion solid propellant is prolonged. The problems that in an existing technical scheme, the burning speed of an end-burning solid propellant is limited in increasing amplitude, burning is uneven, and a single silver wire is prone to being snapped are solved.

The invention provides a high-energy high-burning-rate hydroxyl-terminated polybutadiene propellant containing coated aluminum powder and DAP-4 and a preparation method of the high-energy high-burning-rate hydroxyl-terminated polybutadiene propellant. Comprising the following components in percentage by mass: 16 wt.% of hydroxyl-terminated polybutadiene, 18 wt.% of coated aluminum powder, 54 wt.% of ammonium perchlorate, 10 wt.% of high-energy explosive and 2 wt.% of toluene diisocynate. The invention further relates to a preparation method of the high-energy high-burning-rate hydroxyl-terminated polybutadiene propellant containing the coated aluminum powder and the DAP-4. The DAP-4 adopted by the invention is a high-energy explosive with extremely high combustion rate, and the combustion rate of the DAP-4 is 3-5 times of that of RDX, HMX or CL-20; therefore, the DAP-4 is applied to the hydroxyl-terminated polybutadiene propellant, so that the combustion rate of the propellant can be improved. The hydroxyl-terminated polybutadiene propellant prepared by the invention has the characteristics of high energy and high burning rate.

The invention discloses an intake valve seat ring which is used for improving the performance of an engine. The seat ring comprises a seat ring body, a baffle ring and a baffle, the seat ring body is installed on a cylinder cover of an engine, and a round hole face, a first inclined face and a second inclined face are arranged on an inner ring of the seat ring body. The round hole surface, the first inclined surface and the second inclined surface are sequentially connected; the baffle ring is arranged at one end of the seat ring body and is connected with the circular hole surface; the baffle is arranged on the inner ring of the baffle ring and used for blocking part of inlet gas so as to increase the flow speed of the inlet gas of the engine; the inner diameter of the baffle ring is the same as that of the seat ring body, and the outer diameter of the baffle ring is smaller than that of the seat ring body.

The invention relates to a methanol M100 spark-ignition type marine engine, and belongs to the technical field of engines. Comprising an engine body. The system further comprises a control system, an ignition system and a methanol supply system. The control system is responsible for operation control of the whole engine. The methanol supply system supplies methanol to the methanol rail, the methanol passes through the methanol rail and then is atomized in the intake manifolds of the cylinders, and combustible mixed gas is formed by the methanol and pressurized air and enters the cylinders. And after the mixed gas enters each cylinder, a sparking plug contained in the ignition system ignites the combustible mixed gas to do work. By optimizing key technologies such as a combustion system, a control system and a safety system, efficient, clean and safe operation of the methanol M100 spark-ignition engine is achieved.

The application discloses an engine combustion control method, and relates to the technical field of engine control, which comprises the following steps: obtaining a current intercooled mixture temperature at an outlet of an intercooler; when the current intercooled mixture temperature is less than a preset temperature threshold, controlling engine coolant to flow into the intercooler through a heating passage to heat the mixture in the intercooler by using the engine coolant; determining a target ignition angle corresponding to the current intercooled mixture temperature from a preset mapping relationship between the intercooled mixture temperature and the ignition angle based on the current intercooled mixture temperature; and controlling an ignition device to perform an ignition action based on the target ignition angle. The application actively heats the low-temperature mixture by using the engine coolant and synchronously corrects the ignition angle, thereby improving the mixture atomization quality and the combustion rate under a low-temperature working condition, improving the combustion stability, and improving the thermal efficiency of the engine.

An efficient gas stove fire cover structure comprises an outer ring fire cover and a center fire cover, and outer ring inclined fire spraying holes and outer ring vertical fire holes are formed in the outer ring fire cover; inner ring inclined fire spraying holes and inner ring vertical fire holes are formed in the central fire cover; the outer ring inclined fire spraying holes and the inner ring inclined fire spraying holes are arranged in an outwards inclined manner at an angle of 45-60 degrees; the outer ring vertical fire holes and the inner ring vertical fire holes spray flames upwards in the vertical direction. The multi-layer fire ring has the advantages that the multi-layer fire ring covers more combustion areas, and the pot bottom is heated more comprehensively and evenly. And the inclined fire spraying holes and the vertical fire holes are mutually coordinated and matched, so that gas is more fully mixed, the combustion rate is improved, and remarkable energy-saving and environment-friendly effects are achieved.

The invention relates to the technical field of coal new energy, and particularly discloses a fire coal catalyst. The fire coal catalyst is prepared from the following raw materials in parts by weight: 12 to 22 parts of diethanolisopropanolamine, 25 to 35 parts of triethanolamine, 10 to 20 parts of diesel oil, 1 to 5 parts of desulfurizer and 1 to 5 parts of combustion-supporting filler, the combustion-supporting filler comprises the following raw materials: activated carbon, ethanol and lanthanum oxide. According to the diesel oil disclosed by the invention, all components in the catalyst can be uniformly dispersed, and diethanolisopropanolamine and triethanolamine can instantaneously shorten the ignition time, so that a combustion-supporting effect is achieved; the lanthanum oxide is dissolved by the ethanol, so that the lanthanum oxide is loaded on the activated carbon, and the formed combustion-supporting filler not only has a better combustion-supporting effect, but also can reduce the emission of oxynitride by matching with the desulfurizing agent, so that the obtained coal-fired catalyst not only has higher thermal efficiency, but also has smaller pollution to the environment.

The invention discloses a spark-ignition type methanol engine with low pollutant emission, which relates to the technical field of methanol engines, and comprises four groups of engine cylinders, a vaporizer is mounted on each group of engine cylinders, the back of each engine cylinder is connected with an exhaust pipe, a liquid adding pipe is mounted on the outer side of each vaporizer, and the spark-ignition type methanol engine further comprises a fuel pressurizing assembly, the piston is arranged on an engine cylinder; the fuel pressurizing assembly comprises a combustion chamber, the combustion chamber is located in the middle of the engine cylinder, a piston part is slidably connected into the combustion chamber, a hot fire head is fixed to the top of an inner cavity of the engine cylinder, a first gas conveying pipe is fixed into the engine cylinder, and the top of the first gas conveying pipe communicates with a fixing barrel. And the top of the fixing barrel communicates with a second gas conveying pipe, a one-way valve is fixed to the top of the inner wall of the fixing barrel, a second notch is formed in the engine air cylinder, methanol is pressurized, sufficient combustion can be promoted, and then emission of pollutants is reduced.

The utility model provides a kind of coal powder conveying preheating device, comprising: pneumatic conveying pipeline, the pneumatic conveying pipeline is connected to blast furnace;Hot air source, the pneumatic conveying pipeline is connected with hot air source;Air pump, the air pump is arranged on pneumatic conveying pipeline, the air pump is arranged between hot air source and blast furnace;Screw feeder, the discharge port of screw feeder is connected with pneumatic conveying pipeline, discharge port is arranged between air pump and blast furnace, the feed inlet of screw feeder is connected with coal powder bin, and heat exchange module or heating module is arranged outside screw feeder.Further, heat exchanger is arranged outside the screw feeder, and hot air or blast furnace waste gas is circulated in the heat exchanger.The coal powder conveying preheating device provided by the utility model can directly heat coal powder, ensure the temperature of coal powder during pneumatic conveying, improve the heating effect of coal powder during pneumatic conveying and improve the combustion rate of coal powder in blast furnace.

The invention discloses a moisture-proof smokeless firework propellant powder and a preparation method thereof. The moistureproof smokeless firework propellant comprises the following components in percentage by mass: 0.5-2% of a dispersing agent, 5-20% of an oxidizing agent ammonium perchlorate, 85-90% of an energetic high polymer material containing nitrocellulose, 1-3% of a centralite, 0.5-2% of liquid paraffin and 0.5-1% of an emulsifying agent, and is prepared by adopting a liquid paraffin emulsification coating method. The preparation method is simple, and the prepared damp-proof smokeless firework propellant powder has the advantages of high burning rate, good stability and excellent damp-proof performance, can be stored for a long time, and can be applied to producing opening powder and propellant powder of fireworks and crackers.