34results about How to "Improve combustion performance" patented technology

The invention provides a preparation method of modified nano silicon powder wrapped by a polymer, which comprises the following steps: dissolving a polymer PVDF (Polyvinylidene Fluoride) in an organic solvent N-dimethylformamide DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding Si powder, adding the Si powder in three times, and then carrying out magnetic stirring, so that nano metal powder and a polymer solution are fully mixed; the preparation method comprises the following steps: adding an energetic oxidant AP into a polymer solution containing nano Si powder according to a mass ratio of PVDF / AP of 1: 3, magnetically stirring, and carrying out ultrasonic treatment to obtain a precursor solution PVDF / AP / Si; and relevant parameters are set, and the coated and modified shell-core type nano composite metal powder is prepared through a spray granulation method. According to the invention, the yield of the silicon-based compound can be improved, the energy and combustion performance of the compound are improved, and the cost of coating silicon powder is effectively reduced. In addition, the PVDF, the AP and the silicon powder are wrapped according to the optimal proportion, so that the energy release efficiency of the compound Si-coated PVDF / AP reaches the maximum.

The invention discloses an activated carbon adsorbent with high adsorption capacity, and relates to the technical field of activated carbon adsorbents for natural gas bottles, the activated carbon adsorbent comprises the following components: an active component A: a specially treated metal organic framework material accounting for 10-20% of the total adsorbent material; the active component B is high-quality activated carbon which is subjected to secondary activation treatment and accounts for 60-80% of the total adsorbent material; the auxiliary agent C is a composite auxiliary agent composed of inorganic alkali metal salt and organic amine, the content of the auxiliary agent C accounts for 5-15% of the total adsorbent material, the inorganic alkali metal salt in the auxiliary agent C is potassium carbonate, the organic amine in the auxiliary agent C is triethylamine, and the metal organic framework material in the active component A is MOFs. According to the activated carbon adsorbent with the high adsorption capacity, through the synergistic effect of the active component A, the active component B and the auxiliary C, the methane adsorption capacity can be expected to be improved by 30-50%.

The invention relates to a foliar fertilizer for improving combustibility of cigar tobacco leaves and a fertilizing method. The foliar fertilizer comprises the following components in percentage by mass: 0.3%-0.7% of an amino acid magnesium fertilizer, 0.03%-0.07% of seaweed essence, 0.04%-0.07% of a boron fertilizer, 0.02%-0.07% of a zinc fertilizer, 0.02%-0.04% of a molybdenum fertilizer and the balance of water. The foliar fertilizer capable of improving the combustibility of the cigar tobacco leaves is formed by taking the magnesium element as a main component and adding the boron element, the zinc element, the molybdenum element and the natural active substance seaweed essence, and under the matching action of the substances, the combustibility of the cigar tobacco leaves is effectively improved, and the first-class tobacco rate is increased. Therefore, the foliar fertilizer and the fertilizing method provided by the invention can effectively improve the comprehensive combustion performance of the cigar tobacco leaves, promote the sufficient combustion of the tobacco leaves, and also have the effect of increasing the output value.

A firewood-saving stove comprises a stove body, a stove pipe is arranged in the stove body, a plurality of gasification through holes are formed in the wall above the stove pipe, a fire grate and an ash box are sequentially arranged at the lower end of the stove pipe, and an integral stove bottom panel is arranged at the lower end of the stove body and used for sealing the stove body. Through holes with straight edges are formed in the left position, the right position and the rear position of the integral furnace bottom panel, and the through holes are communicated with a cavity between the furnace body and the furnace pipe; a baffle plate is arranged at the straight edge of the through hole and is used for limiting the ash box; a plurality of annular grooves are pressed in the center of the whole furnace bottom panel surrounded by the through holes, a plurality of annular cavities are formed between the annular grooves and the outer bottom face of an ash box placed on the whole furnace bottom panel, and a gap is reserved between the upper end of the ash box and the fire grate. According to the utility model, the integral furnace bottom panel is welded with the furnace body, so that the primary air inlet quantity flowing into the fire grate and the secondary air inlet quantity flowing above the furnace pipe can be more accurately and effectively controlled according to the opening and closing size of the ash box, the combustion is sufficient, the pollution to the environment is reduced, and the operation environment of cooking personnel is better.

This invention discloses a nicotine-resistant pectin lyase mutant and its application in tobacco leaf treatment. Using pectin lyase PL6 as the starting enzyme, this invention designs and optimizes mutation sites, designing single-site saturation mutations based on the two hydrogen bond formation sites between the enzyme and nicotine, Lys-107 and Asp-84, to construct mutants. The pectin lyase mutants D84A and K107R of this invention retain 83.63% and 81.30% of their enzyme activities at a 1% nicotine concentration, respectively. Spraying tobacco leaves with D84A and K107R enzyme solutions significantly improves tobacco leaf quality due to pectin degradation.

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.

This invention provides a biomass fuel and its preparation method, belonging to the field of waste utilization technology. This invention mixes different waste materials to prepare biomass raw materials, and simultaneously utilizes microbial strains to transform the organic flame retardants contained in the waste raw materials into new flammable agents through biochemical reactions. The prepared biomass fuel has high calorific value, low smoke and dust, and excellent combustion performance, making rational use of various waste materials, and is environmentally friendly, efficient, and energy-saving. The results of the embodiments show that the biomass fuel prepared by this invention has a calorific value of 35.6 MJ / kg, a calorific value of 4100 cal / g, a combustion efficiency of 99.1%, and low smoke and dust.

The invention relates to the technical field of sewage treatment and biological energy, and particularly discloses a method for converting sewage into biofuel for power generation. According to the method, a multi-factor synergistic system containing an inducing factor, a phagocytosis factor and a powdered sugar factor is generated through photosynthetic induction, the inducing factor destroys harmful microorganisms, the phagocytosis factor fixes radioactive substances, germs and viruses, and the powdered sugar factor serves as a carbon value locking precursor; organic pollutants are directionally converted into alcohol clean energy carriers by utilizing a multi-factor synergistic system, and meanwhile, fixed capture of the pollutants is completed; the carbon value is locked by a carbon value locking agent to generate a fixed carbon mixture, and the fixed carbon mixture is dehydrated and dried to obtain the high-purity biochar fuel. Unification of harmless treatment and energy utilization of the radioactive sewage is realized, and the limitation that the radioactive sewage cannot be treated in the traditional technology is broken through.

The utility model discloses a kind of coal powder boiler furnace combustion optimization device, it is related to coal powder boiler technical field, including arc clamping plate, hang installation monitoring unit and feeding control unit.The utility model has reliable hang installation monitoring unit, can install the device stably in the outside of boiler furnace, industrial camera obtains the image of furnace internal flame through high-temperature explosion-proof glass, monitoring computer is burned by analyzing the combustion condition and flame spectrum of flame, and then realize the real-time monitoring of the combustion condition in furnace, find digital basis to combustion diagnosis and optimization in combination with combustion related theory;And having reliable feeding control unit, controller is adjusted to the feeding speed of coal powder by the speed of motor one control, to adjust;Controller is adjusted to the spacing between two crushing rollers by hydraulic cylinder, and then control the crushing fineness and combustion effect of coal powder, to complete the adjustment optimization of furnace combustion condition.

The application discloses a cyclone combustion system of a wing wall furnace boiler, wherein the lower furnace, the main combustion area furnace and the upper furnace all comprise a front wall, a right side wall, a back wall and a left side wall; the front wall, the right side wall, the back wall and the left side wall of the main combustion area furnace are all provided with inclined wing walls between two adjacent sides; each of the four wing walls is provided with a wind distribution chamber; each of the four wind distribution chambers is provided with a burnout air device and two or more layers of cyclone pulverized coal burners from top to bottom; the axes of the burner nozzles of the cyclone pulverized coal burners of the same layer in the four wind distribution chambers are arranged in a diagonal line in pairs; and the cyclone pulverized coal burners of the same layer in the four wind distribution chambers are all connected with the same coal mill; the application can improve the self-stable combustion capacity, the uniformity of the airflow in the furnace and the flame fullness, avoid the flame brushing the wall, realize the good combustion air power flow field organization in the furnace, precisely control the smoke temperature deviation, ensure the safe operation of the large-capacity high-parameter boiler and better meet the high-index requirement of the new generation of coal power technology.

The utility model provides a hydrogen supply mechanism of a diesel engine, which relates to the technical field of diesel engines and comprises a shell body, the shell body comprises a left shell, and a first insulating sheet is arranged on one side of the left shell. According to the utility model, the generated hydrogen is supplied into the cylinder of the engine and is mixed with diesel oil for combustion and acting, and the combustion rate of the hydrogen is higher than that of the diesel oil, so that the hydrogen can be quickly ignited and the diesel oil can be quickly ignited after compression ignition, and the combustion performance is improved, so that the diesel oil can be quickly ignited and fully combusted; therefore, harmful substances are reduced, the emission performance of the engine is improved, and environmental protection is facilitated; meanwhile, the combustion product of hydrogen is only water, so that the environment is not polluted; in addition, diesel oil is rapidly ignited and fully combusted through hydrogen, and under the condition that the same power is output, the injected diesel oil fuel is reduced, and the fuel economy of the diesel engine is improved.

The utility model discloses a combined incense and candle bamboo stick core, which belongs to the technical field of incense and candle production, and comprises a plurality of bamboo canes, the bamboo canes are combined to form a cylindrical stick body, the center of the stick body is provided with a combustion hole, the bamboo canes are fixedly connected with one another, the surfaces of the bamboo canes are smooth surfaces, and the cross sections of the bamboo canes are semicircular or fan-shaped. According to the utility model, the rod body consists of a plurality of bamboo strips, so that when a certain single piece is bent under the influence of contraction, the plurality of pieces are mutually balanced, and the bending can be effectively avoided. Through the arrangement of the combustion holes, ventilation is facilitated when the incense or the candle is combusted, so that oxygen is sufficient.

The invention relates to a double heat accumulating type heating furnace and method for ammonia hydrogen-doped combustion, and belongs to the technical field of heat accumulating type heating furnaces. The double heat accumulating type heating furnace comprises a heat accumulating type combustor system, and a fuel channel / flue gas channel and an air channel / flue gas channel are symmetrically arranged on the two sides of a furnace body of the heating furnace; a first heat storage chamber filled with a fuel channel heat storage body is arranged in the fuel channel / flue gas channel, and a second heat storage chamber filled with an air channel heat storage body is arranged in the air channel / flue gas channel; the gas supply system is connected with the fuel channel / flue gas channel and the air channel / flue gas channel through a reversing system, and ammonia fuel and combustion-supporting air are alternately introduced into the gas supply system; the smoke exhaust system is connected with the fuel channel / smoke channel and the air channel / smoke channel through a reversing system and alternately exhausts smoke; and an ammonia decomposition catalyst layer is loaded in the first heat storage chamber. According to the invention, flue gas waste heat is utilized to drive ammonia gas to crack to produce hydrogen, stable combustion and low-nitrogen emission of ammonia-hydrogen mixed fuel are realized, and thus energy conservation and emission reduction of an industrial furnace are realized.

The invention discloses a low-load stable combustion device of a pulverized coal fired boiler, which relates to the field of combustors and comprises nozzles arranged at four corners of the pulverized coal fired boiler, the air inlet ends of the nozzles are connected with pulverized coal pipe elbows, and the air outlet ends of the nozzles are communicated with the interior of the pulverized coal fired boiler. And primary air carrying pulverized coal in the pulverized coal pipe elbow enters from the air inlet end of the nozzle and is discharged into the pulverized coal boiler from the air outlet end of the nozzle. According to the low-load stable combustion device for the pulverized coal fired boiler, primary air is shunted through cooperation of the concentration cover and the light phase groove, pulverized coal entering the gathering pipe can be concentrated under the cooperation effect of the air groove and the gathering cover, the content of the pulverized coal in airflow exhausted from the gathering pipe is higher, the flow speed is higher, and meanwhile under the cooperation of the electric heating strip, the combustion efficiency is improved. According to the pulverized coal boiler, the ignition point of pulverized coal entering the pulverized coal boiler from the gathering pipe is effectively reduced, the ignition point is advanced, the pulverized coal can be better ignited, low-concentration pulverized coal flowing around can be ignited, and therefore better stable combustion can be conducted on the pulverized coal boiler.

The utility model provides a kind of furnace end structure and stove body, including furnace end inner container and furnace end shell, the furnace end inner container cover is located on the furnace end shell, furnace end inner container and furnace end shell bottom are provided with fuel through-hole, the furnace end inner container sequentially includes wind ring, air ring piece, first air ring wall and mixing ring from top to bottom, the bottom of wind ring is connected to the outside edge of air ring piece, the top of first air ring wall is connected to the inside edge of air ring piece, the bottom of first air ring wall is connected to the top of mixing ring, the outside of air ring piece is located on the furnace end shell, air ring piece is provided with multiple first air holes in vertical, the furnace end structure further includes vaporization core, the utility model structure is simple and can realize good combustion effect, realizes the reduction of furnace end cost.

The present invention relates to a jet fuel composition obtained from renewable feedstock comprising, relative to the total volume of the composition: a. 50-90% by volume of at least one paraffin matrix obtained from the hydrotreatment of esters and fatty acids, from the Fischer-Tropsch process or from the process for producing jet fuels from alcohols, and comprising, relative to the total weight of the paraffin matrix, a. 30-90% by volume of at least one paraffin matrix obtained from the hydrotreatment of esters and fatty acids, from the Fischer-Tropsch process or from the process for producing jet fuels from alcohols; the present invention relates to a method for producing a biofuel comprising: a. At least 90% by weight paraffin, b. 10-50% by volume of at least one C8-C16 cycloalkyl derived from the hydrogenation of a C8-C16 aromatic matrix corresponding to a C8-C16 fraction of a biofuel produced by a process for converting at least one C1-C6 bioalcohol into a fuel, b. At least 90% by weight paraffin, b. 10-50% by volume of at least one C8-C16 cycloalkyl derived from the hydrogenation of a C8-C16 aromatic matrix, the invention relates to an aromatic substrate comprising at least 60% by weight, relative to the total weight of the aromatic substrate, of an aromatic compound comprising at least 50% by weight, preferably at least 80% by weight, of benzene substituted with at least m methyl groups, m being an integer from 1 to 3, and optionally with n C2-C5 alkyl groups, n being an integer from 1 to 3, the jet fuel composition comprises from 10 wt% to 49 wt% of a naphthenic compound relative to the total weight of the composition.

This utility model discloses a tangential combustion system for pulverized coal boilers suitable for low-volatile coal types. It includes a boiler body, an air preheater, a secondary air fan, a primary air fan, and multiple coal mills. Each coal mill outlet is connected to multiple pulverized coal pipes. All pulverized coal pipes are connected to pulverized coal burners on the boiler body. Each pulverized coal burner is equipped with a burner air box. The secondary air fan outlet is connected to the burner air box via the air preheater. The primary air fan outlet is divided into two paths: one path connects to the hot primary air duct after passing through the air preheater, and the other path directly connects to the inlet of the hot primary air duct. The hot primary air duct outlet is divided into two paths: one path directly connects to the inlet of each coal mill, and the other path connects to the pulverized coal pipe at the outlet of each coal mill via a bypass hot primary air duct. This utility model can significantly increase the initial temperature of pulverized coal entering the furnace, improving the ignition and stable combustion capabilities of low-volatile coal.

The invention provides a shell of a burner, the burner and a cooking device. The shell comprises a first cavity wall and a second cavity wall, and the first cavity wall is provided with a drainage opening; the second cavity wall and the first cavity wall are encircled to form an accommodating cavity with an opening; the distance between the second cavity wall and the plane where the opening is located is reduced in the first direction. The first direction points from the drainage opening to the second cavity wall. According to the shell provided by the invention, parts of the combustor can be reduced, and the structural complexity of the combustor is reduced.

The invention discloses an intelligent regulation and control system for fuel injection of a fuel engine, and relates to the technical field of electrical control of fuel injection of fuel engines. Comprising an engine operation parameter acquisition module, a real-time working condition intelligent identification module, an oil injection target parameter intelligent resolving module, a working condition self-adaption self-learning module, a fault diagnosis and safety protection module and a full-working-condition data storage module, the other modules are used for sequentially completing working condition recognition, oil injection parameter calculation, electric driving control, in-cylinder combustion monitoring, oil injection parameter closed-loop correction, working condition self-adaptive learning, fault safety protection and full-period data storage, oil injection process regulation and control are achieved through high-precision electric control, and all-working-condition oil saving and consumption reduction are achieved; the device can adapt to full-life-cycle performance change of the engine, guarantees operation safety and emission compliance, and reduces the operation and maintenance cost of equipment.

A carbon dioxide BOG recirculation system for a marine engine integrates a shipborne carbon capture system, a carbon dioxide storage tank, an engine scavenging box, an oxygen concentration sensor and a control unit. The shipborne carbon capture system efficiently captures and recovers carbon dioxide in exhaust gas of the marine engine through the steps of pretreatment, absorption, desorption, compression, liquefaction storage and the like, and the carbon dioxide is liquefied and stored in a carbon dioxide storage tank. The stored carbon dioxide BOG is utilized, and the flow of the BOG introduced into the scavenging box of the engine is accurately adjusted through the pressure control valve, so that the oxygen concentration in the scavenging box is adjusted in real time, the combustion performance of the engine is optimized, the energy utilization efficiency is improved, and greenhouse gas emission is remarkably reduced; and an oxygen concentration sensor in the oxygen concentration control unit works cooperatively with the control unit, so that real-time monitoring and accurate regulation and control of the oxygen concentration are realized. The method not only accords with the development trend of global energy conservation and emission reduction and green shipping, but also helps to promote technical innovation and industrial upgrading of the shipping industry.

The application discloses a pure hydrogen and hydrogen-rich gas turbine burner and a use method thereof, and relates to the field of gas turbines, in particular to a pure hydrogen and hydrogen-rich gas turbine burner and a use method thereof.The burner comprises a nozzle, a nozzle integrated plate and a flame tube. The flame tube is provided with the nozzle integrated plate at one end. The nozzle integrated plate is provided with mounting holes matched with fuel nozzles. The mounting holes can be arranged in a ring shape, a sector shape, a circular shape and the like according to design requirements to realize flexible control of a target of the burner in stages and in zones. The nozzle is arranged in the mounting hole and used for spraying a fuel and air mixture into the flame tube. The burner has the advantages that: by reasonably arranging the nozzles and matching the flame tube, a target flame shape, an anchoring position, a flame temperature and a flame residence time are realized, stable combustion with low NOx emission, no tempering and no thermal acoustic oscillation is effectively realized, and the like. x

The utility model discloses an ignition device of a sintering machine, which belongs to the technical field of metallurgy and is applied to a sintering machine body, a supporting plate is arranged inside the sintering machine body, a connecting shaft is fixedly connected inside the sintering machine body, and two ends of the connecting shaft extend to the outside of the sintering machine body and are movably connected with structural arms. Supporting frames located behind the connecting shaft are fixedly connected to the left end face and the right end face of the sintering machine body correspondingly, first hydraulic rods are movably installed between the supporting frames and the structural arms through hinged supports, and the output ends of the first hydraulic rods stretch out and draw back to drive the structural arms to change the angle, so that the structural arms drive movable plates and supporting plates below; the supporting plate drives the burner to move up and down, the distance between the burner and a sintering raw material layer is changed, it is guaranteed that the distance between the burner and the sintering raw material layer is the same, the burning effect of sintering raw materials is better, and the burner has the advantages of being better in burning effect, low in fuel consumption and high in fuel utilization rate.

The utility model relates to the technical field of electronic atomization devices, and discloses a smoking set which comprises a shell, a smoke tube and a heating assembly. The chimney is positioned in the shell; the heating assembly comprises a heating coil and a heating core; the heating core is located in the heating coil, and the heating coil is used for heating the heating core; the heating cavity comprises an upper containing cavity, a middle containing cavity and a lower containing cavity, the heating core is a heating block, part of the structure of the heating block is located in the upper containing cavity, and at least the other part of the structure of the heating block is located in the lower containing cavity; or the heating core is a heating wire, and the heating wire is filled in the heating cavity. According to the technical scheme, due to the arrangement, the heating core can extend to the area, except the middle space, in the smoking set, tobacco products in the area, except the middle space, in the smoking set can be heated by the heating core, and therefore the heating radiation range of the heating core is wider; therefore, the tobacco products in the smoke tube can be combusted more sufficiently, the combustion effect is better, and the use experience of a user is improved.

The present application relates to the technical field of combustion furnace, provide a kind of based on heat utilization's biomass particle combustion furnace, including the furnace body for particle combustion, the furnace body bottom is fixedly installed with left high right low grate by vertical plate, the grate and furnace body are formed with primary oxygen distribution chamber and secondary oxygen distribution chamber by partition, the furnace body is installed with the inclined guide plate near the right side of grate;It can be understood that, the equipment is by setting water pipe in the interlayer of furnace body and guide plate, and utilize the heat exchanger connected with oxygen distribution pipe to transfer the heat generated by furnace body to oxygen distribution position, to obtain high-temperature air to achieve better combustion.

The utility model discloses an oil gun with a watering emulsification function, which comprises an oil gun body and an atomizer fixedly arranged in the oil gun body, an oil inlet inner sleeve is fixedly arranged in the oil gun body, a water inlet inner sleeve is fixedly arranged in the oil inlet inner sleeve, and a mixing cavity is formed between an oil outlet and the atomizer. Water directly enters the oil gun body through the water inlet inner sleeve, and oil directly enters the oil gun body through the oil inlet inner sleeve and is preliminarily mixed in the mixing chamber in the oil gun body. The mixed oil and water enter the atomizer and then gradually form a fine water-in-oil, gas-in-oil, gas-in-oil and water mixture similar to emulsified oil under the action of compressed air, compared with the prior art, an additional emulsifying device does not need to be arranged to emulsify the oil in advance, the manufacturing cost is relatively low, almost no requirement for the emulsifying maintaining time exists, and the oil-in-oil, gas-in-oil, gas-in-oil and water mixture is suitable for popularization and application. The oil-water separation phenomenon does not need to be worried, a floating agent does not need to be added, and the manufacturing cost is further reduced.

The invention discloses a smelting method for reducing the combustion temperature of a tuyere whirlpool zone in an oxygen-enriched blast furnace, and the method comprises the following steps: preparing a mixed powder for blast furnace injection; taking 88-99 parts by weight of raw coal for injection and 1-12 parts by weight of an additive, grinding the mixed powder for injection after fully mixing; the raw coal for injection is prepared according to 40-50wt% of bituminous coal and 50-60wt% of anthracite; the additive is prepared according to 70-90wt% of blast furnace slag and 10-30wt% of magnesite; the iron-containing raw materials fed into the furnace are loaded into a furnace top material tank ... The iron raw materials include 70-75 parts of sintered ore, 22-29 parts of pelletized ore and 1-3 parts of scrap steel crushing material; the iron-containing raw materials are smelted in a manner of distributing the material on the furnace top from the outer ring to the inner ring and spraying mixed powder through the tuyere; wherein, the oxygen enrichment rate is 14-16%, the standard wind speed is 300-350m / s, the theoretical combustion temperature before the tuyere is 2300-2350℃, the pressure difference in the furnace is 0.160-0.180MPa, the wind temperature is 1200-1300℃, and the coal ratio is 180-250kg / t·Fe.

The application discloses a kind of high flame-retardant waste spinning blanket and production process, belong to waste spinning blanket material technical field, including the following steps: S1, after being recycled, sorting, disinfecting, the nylon waste spinning is again opened and carded, and pretreated fiber is obtained;S2, pretreated fiber is immersed in isopropyl alcohol solution, then 10wt% concentration chloroacetic acid solution is added, and is stirred and reacted at 50-60 DEG C for 1-1.5h, then after deionized water washing, drying, modified fiber is obtained;S3, modified fiber, modified chain extender, amino nano silicon dioxide, diethyl hypophosphite aluminum are mixed uniformly, and are added to melt spinning machine to spin, after combing, paving into net, again after needle punching processing, hot-pressing treatment, high flame-retardant waste spinning blanket is obtained.The application uses nylon waste spinning as base material, and under the synergistic effect of modified chain extender, amino nano silicon dioxide and flame retardant, the tear resistance and flame retardant performance of waste spinning blanket are improved.

The invention discloses a support plate of an RBCC (Radial Basis Combined Cycle) engine using methane fuel, which comprises a central support plate, the central support plate is provided with a gas leading-in hole from top to bottom, the gas leading-in hole is communicated with an external methane and oxygen mixing chamber, the right side of the central support plate is provided with a rocket hole from right to left, the left end of the rocket hole is communicated with the right side of the gas leading-in hole, and the right end of the rocket hole is communicated with the right side of the gas leading-in hole; the gas guide hole is used for guiding mixed high-temperature gas of methane and oxygen entering from the gas guide hole into the combustion chamber; a methane inlet hole is formed in the top of the central supporting plate from top to bottom, and methane outlet holes communicated with the methane inlet hole are formed in the side walls of the two sides of the central supporting plate; the methane inlet hole is communicated with an external methane gas source, and the methane outlet hole is used for spraying methane entering the central support plate from the methane inlet hole into the isolation section, so that the methane enters the combustion chamber for combustion under the ejection of mixed high-temperature gas of methane and oxygen; according to the invention, methane fuel can be used, so that the RBCC engine can work in a wide range.

The hollow spiral incense stick with a long burning time described in this utility model is characterized by comprising a hollow spiral incense stick body extending downwards in a spiral shape, a base connected to the lower end of the hollow spiral incense stick body, and an insert rod, the upper end of which extends into the base and the lower end of which extends out of the base. This utility model eliminates the need for breaking the incense sticks apart during use, reducing unnecessary waste of mosquito coils. It also boasts a long burning time, is safe to use, and the hollow structure effectively reduces drying time and the amount of bamboo sticks used, significantly lowering production costs.

This invention relates to a combustible heat source composition for smoking articles, which does not contain binders or combustion inhibitors, wherein, relative to 100 parts by weight of the solid powder, it contains 1 to 5 parts by weight of a polyol. Smoking articles using a combustible heat source composed of the aforementioned composition are characterized by excellent ignition and flammability.