19 results about "Low temperature combustion" patented technology

The invention relates to the technical field of gas production materials, and discloses preparation and application of a high-nitrogen energetic gas production material, triazole has high-energy and multi-nitrogen characteristics, nitryl compounds have high energy, and the combination of triazole and nitryl compounds enables the gas production material to have the characteristics of large gas production rate, low-temperature combustion, less harmful gas and the like; the molecular structure contains a large number of N-N, C-N and C = N bonds and has high enthalpy of formation, meanwhile, the content of C and H in the molecule is low, the density of the energetic material can be improved, the electronegativity of nitrogen and oxygen atoms in the structure is high, and the energetic material is a painful energetic material and has high safety in the using process; compared with similar gas production materials, the prepared gas production material has the advantages that the gas production rate is greatly increased, the amount of solid residues is greatly reduced, the added adhesive has no corrosivity, the prepared gas production material is good in fluidity, the external additive can play a role in slagging, and the residues are not prone to being sprayed out.

The utility model discloses a fuel gas energy-saving system of a chopped yarn vibration oven. The fuel gas energy-saving system comprises the chopped yarn vibration oven, a chopped waste gas subsystem, a chopped combustion subsystem and a control subsystem, the chopped waste gas subsystem comprises a waste gas pipe network, dust removal equipment, waste gas purification equipment, a heat recovery pipeline, a fan and a heat exchanger; the short-cut combustion subsystem comprises a combustion fan, a low-temperature combustor, a cabinet, an air return port, a combustion chamber, an air mixing chamber, a high-temperature fan and an air supply port. The combustion-supporting air quantity is accurately controlled, the combustion efficiency is improved, and gas waste is reduced; high-temperature and low-temperature waste air is introduced for shunting and clean waste air is recycled, so that the energy loss in the heat exchange process is reduced; by introducing the efficient heat exchange device, the temperature of combustion-supporting air is increased, the temperature of waste air is reduced, and energy consumption is reduced; an intelligent integrated system is introduced, and automatic and digital management and control are achieved through a temperature control and energy management system.

This invention discloses the application of a carbon-modified noble metal catalyst in the low-temperature combustion of propane or mixed alkanes. The carbon-modified noble metal catalyst is prepared by adding sodium hydroxide solution dropwise to a cerium salt solution, mixing, and reacting to obtain a cerium dioxide support. The cerium dioxide support is then impregnated in an equal volume of noble metal salt solution, dried, and calcined. The calcined product and glucose are added to deionized water, mixed, and subjected to a hydrothermal reaction, followed by drying and calcination to obtain the final product. In this invention, carbon species exist in the form of doping or interstitial filling, inducing lattice distortion and a high concentration of surface oxygen vacancies in the support, significantly improving the mobility of lattice oxygen and the reactivity. Simultaneously, the interfacial carbon species optimize the microelectronic environment of the active center through strong electron interactions, maintaining the low valence state of Ru and the metallic states of Pt and Pd. This catalyst effectively avoids the shielding effect of the carbon layer and exhibits excellent catalytic combustion activity and stability for propane and mixed alkanes at low temperatures.

A gas generant composition for passive inflatable restraint systems (e.g., airbags) for automobiles is provided that comprises a melamine oxalate compound. The gas generant may be a cool burning gas generant composition that comprises a melamine oxalate compound, a co-fuel, such as guanidine nitrate, and an oxidizer, such as basic copper nitrate. The gas generant composition has advantageous combustion properties, including a maximum flame temperature at combustion (Tc) of ≤about 1700K (1,427° C.), a linear burn rate of ≥about 18 mm per second at a pressure of about 10 megapascals (MPa), a gas yield of the gas generant composition of ≥about 5.7 moles / 100 cm3, and a linear burn rate pressure exponent of ≤about 0.35.

The utility model relates to a low-nitrogen marsh gas torch which comprises a marsh gas tank and a combustion chamber which are communicated with each other, and gas is subjected to low-temperature combustion in the combustion chamber; and the screening part is arranged between the biogas digester and the combustion chamber, and non-combustible gas is fed into the biogas digester through the screening part. According to the utility model, the combustion chamber, the biogas digester and the screening part are communicated in a closed-loop manner, so that nitrogen flowing out of the biogas digester can enter the biogas digester again after being screened out, thereby forming a cyclic utilization effect, avoiding the complexity of continuously manufacturing the nitrogen, and improving the production efficiency. Therefore, the whole biogas treatment process can be smoothly carried out.

The invention discloses a low-temperature and high-temperature fan-shaped flame ultralow-nitrogen combustion burner which is characterized in that a burner block is arranged on the lower side of a body, a gas inlet and smoke exhaust channel is arranged on the upper portion of the body and communicated with a combustion channel of the burner block, and an ignition device is used for ignition; a central gas pipe is arranged, the front end of the central gas pipe is a central gas nozzle communicated with the combustion channel, and a central gas pipe control valve is arranged on the central gas pipe; a plurality of peripheral fuel nozzles are arranged on the burner block and connected with the front end of the first gas pipe, and all the peripheral fuel nozzles are located on the same side of the diameter of the central gas nozzle. According to the ultra-low-nitrogen combustion burner, all the peripheral fuel nozzles are located on the same side of the diameter of the central fuel gas nozzle and arranged on the single side, an incomplete combustion area of the peripheral combustion nozzles is formed on the single side of the surface of the burner block during combustion, and the ultra-low-nitrogen combustion burner has excellent low-temperature performance of inhibiting CO generation during low-temperature combustion; and the catalyst has excellent high-temperature performance for preventing generation of NOx during high-temperature combustion.

The present disclosure describes a biomass fuel production system with which it is possible to suppress the cost of producing biomass solid fuel.　This biomass solid fuel production system comprises first fuel production equipment configured to produce a first biomass solid fuel, and second fuel production equipment configured to produce a second biomass solid fuel. The first fuel production equipment includes: a first heating device configured to heat a first biomass raw material to generate the first biomass solid fuel; a first combustion furnace configured to combust a first pyrolysis gas generated by heating the first biomass raw material in the first heating device to generate a first combustion gas; and a first flow path configured to introduce a first low-temperature combustion gas that, of the first combustion gas, is discharged from the first heating device after heating of the first biomass raw material into the second fuel production equipment in order for the first low-temperature combustion gas to be used in production of the second biomass solid fuel.

To provide a diesel fuel oil composition that combines excellent ignition performance, combustion performance at low temperature, low-temperature fluidity, and fuel consumption performance.SOLUTION: A diesel fuel oil composition comprises a hydrotreated vegetable oil and at least one base material selected from desulfurized straight-run gas oil, dewaxed gas oil, and desulfurized kerosene, wherein a content of the hydrotreated vegetable oil based on a total amount of the composition is 0.1 volume percent or more and less than 70.0 volume percent, and the diesel fuel oil composition satisfies all of the following requirements: (1) a cetane number exceeding 58.0, (2) a pour point of -17.5°C or lower, (3) a cold filter plugging point of -10°C or lower, and (4) a gross calorific value exceeding 37000 J / cm3. A method for producing the diesel fuel oil composition is also provided.SELECTED DRAWING: None

This invention discloses a VOCs organic waste gas treatment device, specifically relating to the field of VOCs organic waste gas treatment technology. The device includes a housing, with support legs fixedly connected to the four corners of the lower end of the housing. A filter separation assembly is jointly arranged at the lower end of the housing and the upper part of the inner cavity. An exhaust demisting mechanism is fixedly installed on one side of the housing, and an intake combustion mechanism is installed on one side of the filter separation assembly. A vibration assembly is arranged in the inner cavity of the housing below the filter separation assembly. This VOCs organic waste gas treatment device effectively reduces the energy consumption of the device by combining low-temperature combustion pretreatment with waste heat recycling and solution absorption. It also avoids the limited treatment effect and by-product pollution problems associated with single combustion processes, making the treatment of organic waste gas more stable and efficient, and solving the shortcomings of traditional processes in terms of limited purification and energy waste from the source.

The invention discloses a treatment method and device for smelting nitrogen oxide through a secondary copper pyrogenic process. Timed and quantitative feeding is changed into temperature and nitrogen oxide NOx index feeding; a large amount of nitrogen oxidation is generated when the temperature exceeds 1300 DEG C in the post-melting stage of original timed and quantitative feeding, the peak value reaches 1900 mg / M < 3 >, and SNCR is difficult to treat and reach the standard; the method comprises the following steps: feeding a regenerated copper raw material into an anode furnace, detecting data of temperature in the furnace and nitrogen oxide NOx, controlling the temperature in the furnace to be 800-1100 DEG C, feeding the regenerated copper raw material in time once the temperature rises to be more than 1100 DEG C or the nitrogen oxide NOx reaches the emission index of more than 70%, stopping feeding when the emission nitrogen oxide NOx is reduced to be 20-30% of the emission index, and continuing to work for smelting; and the previous procedure is circulated until the whole smelting process is finished, and generation of thermal NOx is reduced through low-temperature combustion. The method has the beneficial effects that the generation of nitrogen oxides NOx is reduced and controlled through the temperature control source, and the denitration efficiency is improved.

The invention relates to the technical field of preparation of white carbon black by combustion of rice husks, in particular to a method for preparing white carbon black by combustion of rice husks and a horizontal circulating fluidized bed boiler. The amount of air is in the range of 75-95% of the theoretical combustion air amount required by combustion of the rice husks, and the temperature in the combustion chamber is controlled in the temperature range of 650-750 DEG C; in the first separation stage, a first product rich in white carbon black generated by low-temperature combustion of rice husks in the combustion chamber is collected through a first separator arranged at the downstream of the combustion chamber, and the remaining first flue gas flows to the burnout chamber; according to the manufacturing method for preparing the white carbon black by combustion of the rice hulls, the oxygen supply amount in the combustion chamber of the horizontal circulating fluidized bed boiler is limited to inhibit complete combustion of the rice hulls, the combustion temperature is controlled to be lower than 750 DEG C, amorphous silicon dioxide is reserved in rice hull ash, and then qualified white carbon black is manufactured on a large scale at low cost.

The utility model discloses a low-temperature combustion tube, a combustor and an oven. The low-temperature combustion tube comprises a tubular combustion tube body, a first fire outlet hole group and a plurality of second fire outlet hole groups are formed in the upward side wall of the combustion tube body; the first fire outlet hole group is used for arranging and discharging fire in the length direction of the combustion tube body; the second fire outlet hole sets are arranged at intervals in the length direction of the combustion tube body so that an airflow area can be formed between every two adjacent second fire outlet hole sets, and the second fire outlet hole sets are used for conducting arrangement fire outlet in the width direction of the combustion tube body. By the adoption of the scheme, fire is emitted in the length direction of the combustion tube body through the first fire outlet hole set, fire outlet covering in the width direction is achieved with the assistance of the multiple second fire outlet hole sets arranged at intervals, and effective air supply and heat dissipation of the first fire outlet hole set and the second fire outlet hole sets can be achieved under the arrangement of the airflow area; according to the low-temperature combustion tube, the combustor and the oven, combustion is complete, and the temperature of the combustion tube body is lower.

A method of controlling a fuel mix for use in a combustion system, the fuel mix comprising different types of combustible fuels with different carbon content. The method involves controlling the composition of the fuel mix in order to minimise or reduce the carbon content of the fuel mix and / or of emissions produced by combustion of the fuel mix. The method involves minimising the use of high combustion temperature fuels and maximising the use of low temperature combustion fuels. The method involves converting feedstock into high temperature combustion fuels.

The invention provides low-temperature combustion aromatherapy and a preparation method thereof. The low-temperature combustion aromatherapy comprises the following components: vegetable wax, a porous material, a low-temperature additive, an aromatic and vegetable oil, the vegetable oil comprises coconut oil and palm kernel oil; the low-temperature additive comprises absolute ethyl alcohol and / or glycerol. In the low-temperature combustion aromatherapy, the vegetable wax has a low combustion point, the porous material can increase the surface area of the material, promote uniform volatilization of fuel and avoid local high temperature, the low-temperature additive can reduce the combustion temperature through evaporation heat absorption, and by using the vegetable wax, the porous material, the vegetable oil and the low-temperature additive, the low-temperature combustion aromatherapy effect is improved. And the combustion temperature can be effectively reduced.

Disclosed is a method of controlling fuel mix for use in a combustion engine, the method comprising mixing two different fuels of different carbon content to minimise or reduce the carbon content of the fuel mix and / or emissions produced by the combustion engine based on the operating condition of the engine. The method may include minimising the use of high combustion temperature fuels and maximising the use of low temperature combustion fuels. The method may involve converting feedstock into high temperature combustion fuels.

The invention discloses a device and method for instantaneously regulating and controlling the mixing ratio of double fuels in real time through a single fuel injector, the device comprises a first fuel control assembly, a second fuel control assembly, a fusion fuel injector and a controller, two installation platforms are arranged on the upper middle portion of a shell of the fusion fuel injector and used for installing the two fuel control assemblies, and the controller is connected with the first fuel control assembly and the second fuel control assembly. Therefore, an integrated device is formed; the first fuel control assembly and the second fuel control assembly control opening and closing of the oil inlet channel by controlling the ball valve, and therefore the mixing proportion of fuel in the fusion fuel mixing chamber is determined. In the invention, the internal combustion engine can operate in a high-temperature combustion mode based on direct injection of fusion fuel near a top dead center; multi-mode combustion which is compatible with various low-temperature combustion and conventional high-temperature combustion and operates in a full working condition range can be realized, and stable switching in a cycle can be realized; a fuel supply system is simplified, the cost of the engine is reduced, meanwhile, the combustion efficiency is improved, and pollutant emission is reduced.

The present application relates to hot blast stove technical field, specifically relates to low nitrogen combustion hot blast stove of multiple type fuel, be provided with solid-liquid gas three in one combustor in hot blast stove and be connected with hot blast chamber, three modes, air all adopts preheated air and mixed air intake mode of circulating tail gas, realize oxygen deficiency and low temperature combustion, gas passes through mixed chamber three stage air distribution, realizes uniform mixing, carries out fluidization to solid fuel, guarantees combustion effect, carries out atomization to liquid fuel, makes it fully burn, and adopts fine structure, improves combustion efficiency, guarantees combustion effect and prevents blockage, guarantees the stable operation of combustor, the air of combustor is combusted in two sections through hot blast chamber, the mode of segmented combustion, effectively reduces combustion temperature, reduces the generation of high temperature combustion nitrogen, realizes low nitrogen combustion and emission, the present application is reasonable in design, stable in operation, realizes low nitrogen combustion of solid-liquid gas three types of fuel, makes the applicability of hot blast stove wider, also meets the requirements of environmental protection and times.

The application provides an energy-carrying combined cycle heat pump system and belongs to the technical field of heat pumps. The system comprises a low-grade fuel passage, a fuel passage, an air passage, a primary-stage gas passage, a gas passage, an evaporator, a heater, a booster pump, a throttle valve, a steam generator, an ejector, a circulating working medium passage, a low-temperature heat medium passage, and a high-temperature heat medium passage. The low-grade fuel passage is connected with a low-temperature combustion chamber. The fuel passage is connected with a high-temperature combustion chamber. The air passage is connected with the low-temperature combustion chamber through a compressor. The low-temperature combustion chamber is connected with the high-temperature combustion chamber through the primary-stage gas passage. The high-temperature combustion chamber is connected with the outside through the gas passage. The evaporator is connected with the ejector through the circulating working medium passage. The steam generator is connected with the ejector through the high-pressure steam inlet. The ejector is connected with the heater through the medium-pressure cold steam passage. The heater is connected with the steam generator through the booster pump and is connected with the evaporator through the throttle valve. The heater is connected with the outside through the high-temperature heat medium passage. The evaporator is connected with the outside through the low-temperature heat medium passage. The gas turbine is connected with the compressor and the second compressor and transmits power, thereby forming the energy-carrying combined cycle heat pump system.