319 results about "Direct combustion" patented technology

The invention discloses a gas-solid two-phase flow numerical simulation method for bidirectional coupling of non-spherical particles and a flow field, and belongs to the technical field of biomass fuel utilization, and the method comprises the following steps: constructing a flow field model in Fluent, and correspondingly setting an initial boundary condition of the flow field; setting initialization conditions of non-spherical particles in the UDF; establishing an inertial coordinate system and a particle coordinate system, and coupling the two coordinate systems; and obtaining a translational motion table / rotational motion characterization equation, determining the position and direction of the particles by solving the two equations, correcting flow field parameters by using the positions and direction of the particles, and iteratively calculating particle motion parameters to realize bidirectional coupling of the non-spherical particles and the flow field. According to the numerical simulation method, through Fluent-UDF numerical simulation, the interaction between the non-spherical particles and the flow field can be accurately simulated, the accuracy of gas-solid two-phase flow numerical simulation is guaranteed, understanding of the complex process of direct combustion coupling of biomass particles of a coal-fired boiler is deepened, and theoretical support is provided for optimization of combustor design and the combustion process.

The invention discloses a method for preparing methanol from carbon dioxide by coupling biomass direct combustion with wind, light, green and hydrogen. The method comprises the following steps: feeding biomass into a biomass boiler through a screw feeder and a trestle for direct combustion to obtain flue gas with high carbon dioxide content; the flue gas is treated to generate carbon dioxide gas with the pressure ranging from 1.4 MPaG to 1.6 MPaG; the method comprises the following steps: mixing carbon dioxide gas and hydrogen according to a molar ratio of about 1: 3, and compressing the mixture into 9.0 MPaG synthesis gas through a synthesis gas compressor; the synthesis gas flows to a gas-gas heat exchanger for heat exchange and temperature rise, and then is introduced into a methanol synthesis tower to form a material; the materials are subjected to heat exchange and cooling through a gas-gas heat exchanger and then flow to a high-pressure flash tank to be separated to form first gas and first liquid; the first liquid flows to a low-pressure flash tank to be separated to form second gas and second liquid conveyed to a crude methanol rectifying tower; separating and purifying the crude methanol in a rectifying tower to form methanol, fusel and overhead gas flowing to the biomass boiler; the utilization rate of the biomass carbon is improved.

The invention discloses a multi-fuel combustion gas boiler coupling biomass direct combustion power generation method, and belongs to the field of biomass utilization. According to the method, after basic characteristics, combustion characteristics and dynamic characteristics of fuel are analyzed, a numerical model is established; then, calculating the numerical model of the blending combustion biomass fuel, and determining the optimal biomass fuel fineness, nozzle position and blending combustion proportion; and according to a numerical simulation result, corresponding process system design optimization and combustion adjustment measure formulation are carried out. According to the method, on the basis of raw material basic physicochemical and combustion characteristic analysis, a coal-biomass-coke oven gas large-difference fuel multi-element mixed combustion model is constructed, and on the basis of numerical simulation calculation, safe and stable mixed combustion of biomass fuel in the positive-pressure direct-fired pulverized coal boiler for large-proportion mixed combustion of surplus coal / coke oven gas of an iron and steel plant is achieved.

The invention relates to the field of gas combustion, and discloses an ultralow-concentration gas heat storage type direct combustion incinerator which comprises a first gas storage tank, an adsorption assembly, a second gas storage tank and a combustor, the adsorption assembly comprises a rack, an upper cover plate and a lower cover plate are arranged on the rack, and the axis of the upper cover plate and the axis of the lower cover plate are vertically arranged; a vertically-arranged rotating body is rotationally installed between the upper cover plate and the lower cover plate, a rotating shaft formed at the rotating installation position is in power connection with a motor, at least three installation holes are formed in the end face of the rotating body in a penetrating mode, the installation holes are formed in the circumferential direction of the rotating body in an array mode, and activated carbon is arranged in each installation hole. The end face of the upper cover plate is provided with a gas inlet, an air outlet and a gas outlet which are communicated with the three mounting holes respectively, when the motor drives the rotating body to rotate, the mounting hole communicated with the gas inlet can be sequentially communicated with the air outlet and the gas outlet, the end face of the lower cover plate is provided with a heat exchange opening, and the heat exchange opening and the gas outlet are coaxial.

The invention relates to the technical field of energy utilization, in particular to a system and method for preparing green methanol from biomass coupled green hydrogen, and the system comprises a water electrolysis hydrogen production device, a biomass gasification device, a biomass direct combustion device, a biomass power generation device and a methanol synthesis device, oxygen generated by the water electrolysis hydrogen production device is communicated with the biomass gasification device, hydrogen generated by the water electrolysis hydrogen production device, and the biomass gasification device and the biomass direct combustion device are communicated with the methanol synthesis device; and the biomass direct combustion device is connected with the biomass power generation device. According to the system for preparing the green methanol by coupling the biomass and the green hydrogen, the biomass is converted into the green methanol, high-value utilization of biomass resources can be achieved, and convenient conditions can be provided for long-distance conveying of products and absorption of wind, light and green electricity.

The invention discloses a car bottom type carbon roasting furnace, which belongs to the technical field of heat treatment furnaces, and comprises a furnace car and a fixed furnace body arranged above the furnace car, the top of the fixed furnace body is provided with a circulating fan, the left side of the circulating fan is provided with a spraying device, and the two sides of the circulating fan are provided with a plurality of combustion nozzles side by side. A smoke exhaust pipeline for exhausting smoke is arranged at the tail part of the fixed furnace body; a heat preservation and insulation module is further arranged in the fixed furnace body. A furnace door and a water-cooling door frame are arranged on the front portion of the fixed furnace body. According to the invention, a smoke combustion mode of saggar-exhaust pipe-storage tank-combustor is completely abandoned, and a mode of discharging smoke volatile matter to the incinerator for direct combustion is adopted, so that the comprehensive energy consumption is below 3.6 * 10 < 6 > kJ, and the energy consumption level of a domestic ring type roasting furnace is completely reached. Meanwhile, the gas leakage amount is extremely small, the temperature distribution in the furnace is uniform, the product homogeneity is good, and operation automation, temperature control precision, fuel utilization maximization and finished product high normalization are achieved.

The utility model discloses a solid oxide fuel cell (SOFC) system combined with a Stirling engine, and belongs to the technical field of SOFC systems. The device comprises an SOFC electric pile, the SOFC electric pile comprises a fuel input end, an air input end and a tail gas output end, the fuel input end is connected with a reformer, the air input end is connected with an air pump, and the tail gas output end is connected into a combustor of a Stirling engine; the air pump is divided into two paths to be connected into the air input end, one path is connected into the air input end after passing through the heat dissipation end of the Stirling engine, and the other path is directly connected into the air input end; and waste gas generated by the Stirling engine is introduced into the reformer to provide heat for the reformer. According to the utility model, tail gas generated by the SOFC electric pile is introduced into the Stirling engine for direct combustion, so that energy waste is avoided, meanwhile, the control valve is arranged for shunting air, the flow of air in different paths is controlled to control the power of the system, and energy is saved.

The disclosed embodiments provide a temperature controlled charcoal grill and smoker that enables users to better control the cooking and smoking temperature relative to previous solutions. In some embodiments, for example, a user may place a divider in the interior of a fuel basket to coarsely adjust the amount and type of solid fuel used to heat a food-cooking enclosure of the temperature controlled charcoal grill and smoker. In addition, the user can also position a heat deflector tent above one or more heat transfer openings in a grease tray to further adjust the cooking and smoking temperature. Further still, the user can provide even finer control (including closed-loop control) over the cooking and smoking temperature using a controller that controls the speed of a fan that directs combustion air into the fuel basket.

The invention discloses an environment-friendly automatic purification integrated treatment system for copper processing, a cleaning device is used for cleaning and filtering flue gas conveyed by a gas collecting hood, the cleaning device comprises a partition plate, a smoke outlet barrel is arranged on the partition plate, the lower end of the smoke outlet barrel is communicated with a lower cavity formed by partition of the partition plate, and the lower end of the smoke outlet barrel is communicated with a smoke outlet. Fan blades are rotationally arranged at the bottom of the cleaning box, a plurality of atomizing nozzles are arranged at the top of the smoke outlet barrel, and a demister is arranged at the top of each atomizing nozzle; the filtering device is used for filtering harmful gas in the cleaned flue gas; flue gas sequentially passes through a cleaning device used for cleaning dust particles and emulsion in the flue gas, a filtering device used for primarily filtering impurity particles in the flue gas, a combustion device used for directly combusting organic gas in the flue gas and an activated carbon adsorption device used for adsorbing and filtering harmful gas in the combusted flue gas. Final products of the flue gas are water and carbon dioxide, and the emission of the flue gas meets the emission standard.

The utility model discloses an oily sludge integrated pyrolysis treatment system which comprises a pyrolysis outer furnace and a pyrolysis inner furnace fixedly arranged in the pyrolysis outer furnace, a bottom bracket is fixedly arranged at the bottom of the inner wall of the pyrolysis outer furnace, and a heating mechanism is fixedly mounted on the bottom bracket; the top end of the pyrolysis outer furnace is fixedly provided with a stirring mechanism for fully heating the oily sludge, one side of the top end of the pyrolysis inner furnace is fixedly communicated with a pyrolysis gas guide pipe, and one end of the pyrolysis gas guide pipe is fixedly provided with a purifier. According to the integrated pyrolysis treatment system for the oily sludge, the improved heating mechanism is adopted, pyrolysis gas generated by pyrolysis is directly guided into the spray combustion assembly to be directly combusted together with liquefied gas, on one hand, the use amount of the liquefied gas in the pyrolysis process can be reduced, more energy is saved, on the other hand, the pyrolysis gas does not need to be condensed and recycled, and the cost is reduced. And the complexity and difficulty of the pyrolysis process are reduced, the safety is higher, and more energy-saving and environment-friendly effects are achieved.

The utility model discloses a processing device for biomass direct-combustion coupling power generation, which relates to the field of biomass direct-combustion coupling power generation and comprises a crushing bin, a stock bin, a conveying piece and matched parts, the interior of the stock bin is divided into a feeding bin and a discharging bin through a transverse sieve plate, and the transverse sieve plate is connected with an inclined sieve plate to form a sieving channel; a conveying piece on the outer side of the crushing bin drives a claw hook to convey large-particle materials in the feeding bin back to the crushing bin, and the large-particle materials are matched with crushing teeth to achieve circulating crushing. And an electric heating wire is matched with a heat preservation layer, so that material caking is avoided. Through grading screening, directional circulation crushing and anti-blocking and anti-caking design, the device can efficiently complete biomass pretreatment, material uniformity and device stability are improved, energy consumption and maintenance cost are reduced, and the device is suitable for the direct-combustion coupling power generation pretreatment link of biomass such as wood and straw.

The invention provides an oil, gas, coke and electricity coupling co-production process of low-rank coal, and relates to the technical field of comprehensive utilization of coal, the oil, gas, coke and electricity coupling co-production process comprises the following steps: raw material pretreatment: taking power coal or low-rank coal as a raw material, drying and crushing, and inputting into a dry distillation device; destructive distillation and pyrolysis: pyrolyzing the raw materials by a destructive distillation device to produce raw gas and high-temperature red coke; gas purification and tar separation: purifying and separating the raw gas to obtain chemical products such as coal tar and purified gas; the purified coal gas is divided into two paths, one path flows back to the dry distillation device to serve as a combustion heating heat source, and the other path serves as a product to be sold or used for producing chemical products such as methanol and LNG; directly combusting the red coke: directly inputting the high-temperature red coke into a boiler device for combustion without a coke quenching process; the high-temperature red coke can be separated into coke particles and coke foam by the screening device before entering the boiler device, the coke particles are sold as products, and the coke foam is input into the boiler device for combustion; the low-rank coal is effectively and fully utilized through the co-production process for steam and electric power production.

The invention relates to the technical field of natural gas vehicles, in particular to a parking warm air system of a gas vehicle and a parking warm air control method. The parking warm air system comprises a gas tank, a combustion chamber and a fan assembly, wherein the fan assembly is used for conveying air to the combustion chamber; the air supply pipeline is used for circularly supplying air into the vehicle room, and a heat exchange channel is arranged between the air supply pipeline and the combustion chamber; the temperature sensor is used for monitoring the real-time indoor temperature of the vehicle; and the control assembly is used for adjusting the opening degree of the electromagnetic valve and the gas supply rate of the fan assembly according to the real-time temperature of the vehicle, the target temperature and the pressure parameter in the gas tank. Natural gas is directly extracted from the gas tank, and direct combustion is carried out through the combustion chamber, so that the heating requirement of a driver during rest is met. Furthermore, according to the warm air system, the opening degree of the electromagnetic valve and the rotating speed of the fan can be adjusted according to the pressure in the fuel gas tank, and sufficient combustion and even heating of fuel gas parking warm air are achieved.

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

The present application relates to waste gas treatment technical field, especially to a kind of direct combustion incinerator water seal fire stopper anti-backfire system and application, including incinerator, combined combustor, waste gas source, waste gas fan, water seal fire stopper main body, desalted water source, desalted water injection component, boundary butterfly valve, waste gas pipeline first hand valve, waste gas pipeline second hand valve, waste gas pipeline third hand valve, waste gas pipeline fourth hand valve, flammable alarm instrument LEL, waste gas pipeline switch valve, water seal fire stopper air inlet pipeline, water seal fire stopper air outlet pipeline and water seal fire stopper burst disc;Water seal fire stopper air inlet pipeline and water seal fire stopper air outlet pipeline are all arranged on water seal fire stopper main body, waste gas source is connected with waste gas fan by pipeline, solve the technical problem that the anti-backfire mode in prior art encounters deflagration backfire or high concentration waste gas impact, fire resistance reliability is insufficient, easily failure due to filter element damage, cannot effectively block flame back to upstream pipeline and device.

The invention belongs to the technical field of environmental protection, and particularly relates to a direct-fired incinerator based on environmental protection, which comprises a transfer component, and a feeding component is arranged at the top of the transfer component; the top of the incinerator is provided with an adapter sleeve box; the exhaust component is arranged at the bottom of the transfer component and is used for exhausting internal dried water vapor; the transfer part comprises a container, and transfer cutting grooves are formed in the left side and the right side of an inner cavity of the container. According to the device, most of water in collected garbage can be removed through an air blowing plate, then the garbage is subjected to fine drying treatment through an upper dryer, and at the moment, the garbage can be flatly laid on the upper surface of a built-in transmission belt under the vibration effect of an internal vibration component; therefore, the problem that residual water in the stacked garbage cannot be dried is solved, the garbage subsequently thrown into the incinerator is ensured to be in a relatively dry state, and the problem that the garbage cannot be fully combusted due to water interference is avoided.

A cooking grill has a cooking chamber containing a cooking grate, a solid fuel fire pit beneath the cooking chamber, a fire chimney interposing the fire pit and the cooking chamber, a fuel hopper attached to a fuel chute directing solid fuel from the hopper into the firepit by gravity, and a fan directing combustion air into the fire pit.

The application discloses a pool fire simulator and simulation method based on gas real fire simulation technology, which comprises a gas cylinder group, a gas conveying pipeline, a simulation oil pool, a rectifying sand layer and a pulse electronic igniter, the simulation oil pool is internally provided with the rectifying sand layer, a plurality of gas guide channels are formed in the rectifying sand layer, the gas cylinder group is connected with the input end of the gas guide channel through the gas conveying pipeline, a controllable gas electronic valve is arranged on the gas conveying pipeline, the simulation oil pool is additionally provided with the pulse electronic igniter outside, and the ignition end of the pulse electronic igniter is located above the output end of the gas guide channel; and the rectifying sand layer is made of steel sand. In the application, the gas real fire simulation is used, and the gas is used as a gas source, compared with direct combustion transformers, the smoke gas amount is small, the system is more environmentally friendly, and through the arrangement of the rectifying sand layer, the transformer oil fire rapid heating can be simulated to the maximum extent, and the combustion characteristics of the actual transformer oil fire are embodied.

A pressurized gasification device adopting heat storage and supply comprises a pure oxygen pipe, a pulverized coal pipe, a cyclone combustion cylinder, a heat storage device I, a heat storage device II, a gasification agent pipe, a temperature detector, a high-pressure fan, a gasification agent nozzle, a gasification furnace, a gasification furnace grate, a coal bunker, a coal lock, a coal lock upper valve, a coal lock lower valve, a chilling chamber and a slag pool. High-temperature flue gas generated by pure oxygen combustion of pulverized coal enters the heat storage device for heat storage, heat is transmitted to a gasifying agent and then is fed into the gasification furnace, the situation that conventional air combustion influences the efficiency of the gasification furnace and direct combustion of lump coal in the gasification furnace is avoided, the operation cost of the gasification furnace is reduced, meanwhile, heat is provided for the gasification furnace in an external heat supply mode, and energy is saved. The operation flexibility of the gasifier is improved.

A direct combustion incinerator with ultra-low nitrogen oxide emission, a VOCs front wall nozzle is arranged at the front end of the incinerator body, a furnace front nozzle is arranged at intervals on the front outer wall of the incinerator body, and an incinerator exhaust chamber is installed, a VOCs air inlet pipe is arranged on the front end surface of the incinerator exhaust chamber, the entire incinerator is wrapped with a combustion-supporting air chamber, a combustion-supporting air inlet pipe is arranged on the combustion-supporting air chamber, and a VOCs circumferential nozzle, a cooling medium nozzle, a shallow oxidation zone nozzle and a deep oxidation zone nozzle arranged in an annular manner are arranged on the incinerator body in sequence, the entire furnace is divided into a reduction zone, a cooling zone, a shallow oxidation zone and a deep oxidation zone, the start-up burner is connected to the furnace, the exhaust gas pipeline is connected to the exhaust gas chamber, and the exhaust gas enters the furnace through the nozzle and the nozzle for combustion. The air inlet is connected to the wind chamber, and the combustion-supporting air is sprayed into the furnace through the nozzle to provide the required air volume for the exhaust gas combustion and ensure the burnout rate. The incinerator is equipped with a cooling medium nozzle for spraying a cooling agent to maintain the temperature field in the furnace within the operating temperature range.

The present invention provides a sulfur-fixing additive for high-sulfur coal and a preparation method thereof. The sulfur-fixing additive for high-sulfur coal provided by the present invention comprises the following components by weight: 6-7 parts of calcium oxide, 2-3 parts of zinc chloride and (3-4 parts of magnesium oxide). The sulfur-fixing additive is mixed with raw coal in a weight percentage of 90-94% of raw coal and 6-10% of the sulfur-fixing additive, and then placed in an inert atmosphere for heating and pyrolysis, with a heating rate of 10°C / min and a termination temperature of 900°C, to obtain direct combustion of semi-coke, and to achieve sulfur-fixing and emission reduction during combustion. The sulfur-fixing additive for high-sulfur coal of the present invention can significantly reduce the release of sulfur oxides, and can significantly improve the high-temperature sulfur-fixing effect of the sulfur-fixing agent and the thermal efficiency of coal combustion, and has great prospects for promotion and application.

The present invention discloses a roller changing method for a direct-fired section of a horizontal annealing furnace, relates to the technical field of horizontal annealing furnaces, and solves the problems of long operation time and jamming of rollers and sinking strip steel when replacing furnace rollers in a direct-fired furnace. The method comprises stopping the vehicle for cooling; connecting a roller changing tool to the drive side shaft end of the furnace roller to be removed and synchronously moving it to the operation side until the furnace roller to be removed is moved out of the furnace and the roller changing tool is inserted into the furnace; connecting the roller changing tool to the drive side shaft end of the furnace roller to be installed and synchronously moving it to the drive side, and controlling the roller changing tool so that the protrusion lifts the strip steel in the annealing furnace until the furnace roller to be installed moves into place. The roller changing tool has the advantages of simple structure, convenient implementation and low cost. This scheme can realize the rapid replacement of furnace rollers without jamming, solves the jamming problem of sinking strip steel and new rollers, and the operator can complete the roller changing work without entering the furnace. The parking time and the number of times the furnace cover is opened are reduced as a whole, and the normal production of the production line is guaranteed, which has economic value.

The utility model discloses a flare gas recovery device which comprises a Venturi tube, a flare liquid separation tank, a flare head, a pressure relief pipe, a fuel gas compressor, a supply pipeline and an output pipeline, an inlet of the flare liquid separation tank is used for receiving flare gas, a gas phase outlet of the flare liquid separation tank is communicated with the flare head through the pressure relief pipe, a first one-way valve is arranged on the pressure relief pipe, and a second one-way valve is arranged on the fuel gas compressor. The input end of the gas compressor is connected with a supply pipeline, the output end of the gas compressor is connected with an output pipeline, the input end of the Venturi tube is communicated with the output pipeline through a first bypass pipe, the suction end of the Venturi tube is communicated with the output end of the torch liquid separation tank through a second bypass pipe, and the output end of the Venturi tube is communicated with the supply pipeline through a third bypass pipe. A second one-way valve is arranged on the third bypass pipe, a fourth bypass pipe communicated with the input end of the torch liquid separation tank is arranged on the supply pipeline, and a pressure control valve is arranged on the fourth bypass pipe. According to the device, flare gas can be recycled, and direct combustion emission of the flare gas is reduced.

The utility model discloses an air re-return device of a multi-section type direct combustion furnace, which comprises a recovery machine shell, a recovery assembly is fixedly arranged on one side of the recovery machine shell, the recovery assembly comprises a recovery base and a recovery seat, one side of the top end of the recovery base is fixedly connected with the bottom end of the recovery seat, and a length plate is rotatably connected in the recovery seat. A recycling cover is fixedly installed on one side of the length plate, a lifting groove is formed in one side of the inner wall of the recycling machine shell, and the middle of the lead screw is in threaded connection with a lifting block in sliding connection with the lifting groove. The recovery cover collects oxygen or air injected into the multi-section direct combustion furnace, the oxygen or the air is purified through the filter plate and then flows back into the multi-section direct combustion furnace through the release spraying plate on the release mechanism, the injected oxygen or part of the air makes full contact with materials, waste of the oxygen or the air is avoided, and the machining cost of the multi-section direct combustion furnace is reduced.

The invention belongs to the technical field of coal mine gas treatment devices, and particularly discloses a coal mine gas treatment device which comprises a gas distribution device, a gas storage device, a combustion device and a first valve. The gas distribution device is provided with a first gas inlet, a first gas outlet and a second gas outlet, clean gas is conveyed to the gas distribution device through the first gas inlet, the gas storage device is provided with a second gas inlet and a third gas outlet, and the second gas inlet is communicated with the first gas outlet; the combustion device comprises a direct combustion chamber and a medium heat storage oxidation chamber, the direct combustion chamber is communicated with the third gas outlet and the second gas outlet, the medium heat storage oxidation chamber is communicated with the second gas outlet, and when the concentration of clean gas in the gas distribution device is higher than the preset concentration, the second gas outlet is communicated with the direct combustion chamber; when the concentration of clean gas in the gas shunting device is lower than the preset concentration, the second gas outlet is communicated with the medium heat storage oxidation chamber; the first valve communicates with the third gas outlet and the direct combustion chamber, and the treatment convenience and efficiency are improved.

The invention relates to a method for operating an internal combustion engine (10) with a gaseous fuel. The method comprises the compression of combustion air by means of a compressor (12) of the internal combustion engine (10). Furthermore, the method includes the introduction of the compressed combustion air into a main combustion chamber (14) of a cylinder (16) of the internal combustion engine (10) during an intake stroke of the cylinder (16). The method also includes the option of operating the internal combustion engine (10) in a first injection mode (M1) or in a second injection mode (M2).In the first injection mode (M1), the gas fuel is injected directly into the compressed combustion air in the main combustion chamber (14) of the cylinder (16) during the intake stroke by means of a direct injection device (18), whereas in the second injection mode (M2), the gas fuel is injected directly into the compressed combustion air in the main combustion chamber (14) of the cylinder (16) during a compression stroke by means of the direct injection device (18). Furthermore, the invention also relates to an internal combustion engine (10) for carrying out the method and to a motor vehicle with such an internal combustion engine (10).

The application discloses a kind of lost foam casting tail gas electric heating combustion processing device, air inlet pipeline, with the tail gas discharge port of lost foam casting production line is sealed connection by flange, for the treatment gas generated in casting process is transported to pretreatment module;While pipeline inner wall is equipped with anticorrosive coating and guide vane;Pretreatment module is connected with the outlet end of air inlet pipeline and the air inlet end of direct combustion module, for dust removal to treatment gas;Heat recovery module and the outlet end of direct combustion module and the air inlet end of deep treatment module are detachably connected by flange, for recovering high-temperature tail gas waste heat discharged by direct combustion module and realizing energy recycling.The application has the beneficial effects of ensuring gas emission, reducing heat exchange efficiency decay, reducing maintenance energy consumption, reducing dust deposition and pressure loss, prolonging equipment service life, low manufacturing cost, not easy to damage and simple maintenance operation.

The invention discloses a ship BOG compressor parallel operation system and a control method thereof.The ship BOG compressor parallel operation system is characterized in that when a ship main engine gas mode is initially started, one compressor is adopted for independently supplying gas to a ship main engine, and the other compressor is adopted for independently supplying gas to a gas combustion unit for use; by adopting the control strategy, waste caused by direct combustion of natural gas is reduced, stable operation of a fuel gas mode of the marine main engine can be guaranteed, and the marine main engine is more stable in fuel gas mode. BOG formed by natural volatilization of the fuel tank or the liquid cargo tank is used for main engine combustion to the maximum extent, BOG combustion is avoided or reduced as much as possible, and therefore the operation economical efficiency of the LNG liquid cargo ship or the fuel ship is achieved.

The present invention belongs to the technical field of gas direct-fired heating devices, and in particular, is a gas direct-fired superconducting partition-type high-efficiency purification heating device, including a heat exchange box, a sandwich square box installed in the heat exchange box, a heat storage body installed inside the sandwich square box, one end of the sandwich square box is connected to a burner mounting seat, and one end of the burner mounting seat is fixed with an oxygen-type gas burner. The present invention adopts partition-type heat storage heating, long channel heat exchange, progressive heat release and other structures to ensure efficient transmission of heat energy and that the circulating hot air will not be thermally decomposed and carbonized in the heating area to produce a large amount of pollutants. The built-in furnace avoids the loss of heat energy during transportation. The use of a dual-channel combustion-supporting air oxygen combustion system and a gas-to-gas heat exchange device controls the amount of nitrogen oxides produced while incinerating a large amount of harmful polluting gases. The waste heat is also reasonably and effectively reused, solving the problem of the difficulty in recycling low-temperature waste heat.

The invention relates to a method for operating an internal combustion engine using ammonia as fuel, wherein the ammonia is split into at least a hydrogen-nitrogen mixture by means of a cracker, and wherein, when starting the internal combustion engine, a gas containing at least hydrogen is first supplied from a starting storage tank to avoid a starting delay due to the splitting of the ammonia, and then the hydrogen-nitrogen mixture split at the cracker is supplied to the internal combustion engine. The invention further relates to a quick-start device and an internal combustion engine for the direct combustion of ammonia. The invention avoids the disadvantages of the prior art and ensures a low-emission and direct start (quick start) without lengthy preheating measures in an internal combustion engine using ammonia as the sole fuel.