282 results about "Carbon particle" patented technology

The invention relates to the technical field of battery negative electrode materials, in particular to irregular spherical porous carbon and a preparation method and application thereof, and a silicon-carbon composite material and a preparation method and application thereof. The liquid phenolic resin is emulsified, compounded, cross-linked and cured under the condition of an oil-soluble and water-soluble compound emulsifier, meanwhile, the shape of the obtained resin is changed in an ultrasonic-assisted mode under the combined action of ultrasonic disturbance and different interfacial tensions, spherical resin is adjusted into irregular spherical resin, and the spherical resin is prepared into the irregular spherical resin. And performing pyrolysis and gas activation to obtain the irregular porous spherical carbon. Compared with spherical carbon, the irregular spherical carbon prepared by the invention has the advantages that on the premise of keeping the strength of the spherical carbon, the irregular spherical carbon can increase the contact area between carbon particles and a binder, and the carbon particles and the binder are not easy to separate, so that the cycling stability of a battery (especially a lithium ion battery) is improved.

The invention relates to the technical field of batteries, in particular to a silicon-carbon negative electrode material and a lithium ion secondary battery. The silicon-carbon negative electrode material comprises silicon-carbon particles, the silicon-carbon particles comprise a matrix, and the matrix comprises a porous carbon matrix and silicon particles located in internal holes of the porous carbon matrix; the porous carbon substrate is provided with open pores and closed pores, the open pores contain silicon particles, the closed pores contain an element K, and based on the total mass of the silicon carbon particles, the mass content of the element K is 50 ppm to 1000 ppm; the silicon-carbon particles comprise halogen, and based on the total mass of the silicon-carbon particles, the mass content of the halogen is 50 ppm to 2000 ppm; the silicon carbon particles and deionized water are mixed according to the mass ratio of 1: 10 to obtain an aqueous solution, the pH value of the aqueous solution at 25 DEG C is pH 1, and the pH 1 is 6-8. Comprising the silicon-carbon negative electrode material disclosed by the invention has the advantages that the expansion rate is improved, and the rate capability and the cycle performance are improved.

The application relates to the technical field of lithium / sodium ion battery negative electrode materials, in particular to a phosphorus-based negative electrode material with a solid electrolyte interface and a preparation method and application thereof, the method comprises the following steps: mixing phosphorus powder, a carbon material and a metal fluoride and performing ball milling to obtain a composite negative electrode material; and performing sieving treatment on the composite negative electrode material to obtain the phosphorus-based negative electrode material. According to the application, the metal fluoride is doped to in-situ construct a solid electrolyte interface with high strength and high lithium ion / electron transmission, so that the cycle stability and the rate performance of the battery are improved. When the lithium ion battery is discharged, the metal fluoride can in-situ construct a solid electrolyte interface rich in fluorinated lithium with high Young's modulus and lithium-metal alloy with high ion / electron conductivity on the surface of phosphorus-carbon particles prior to phosphorus-carbon lithium intercalation, the solid electrolyte interface can enhance the strength of the solid electrolyte interface by means of the fluorinated lithium with high Young's modulus, so as to inhibit the expansion of the phosphorus-carbon negative electrode, and the cycle stability is improved.

The invention discloses a negative electrode material, a negative electrode plate prepared from the negative electrode material, and a secondary battery, and belongs to the technical field of electrochemical energy storage. And the size of the silicon-carbon particles and the thickness of the coating layer are synchronously regulated and controlled based on the particle size difference of the graphite particles, so that the material not only can realize ideal cycle stability when being applied to the negative electrode material of the secondary battery, but also has excellent floating charge performance.

The invention provides a composite silicon-carbon negative electrode material and a preparation method thereof, a negative electrode plate and a battery. The composite silicon-carbon negative electrode material comprises a silicon-carbon composite core, and a gradient pore carbon buffer layer and a dynamic self-healing binder layer which sequentially coat the surface of the silicon-carbon composite core, a branched carbon nanostructure grows in the pore wall of the gradient pore carbon buffer layer, the dynamic self-healing binder layer partially permeates into the pores of the gradient pore carbon buffer layer, the dynamic self-healing binder layer contains dynamic disulfide bonds, and the dynamic self-healing binder layer comprises a composite binder and a conductive high-molecular polymer. According to the invention, the gradient pore buffer layer is arranged on the surface of the silicon-carbon particles, and meanwhile, the self-healing binder containing dynamic disulfide bonds is used for permeation filling, so that three-dimensional cooperative regulation and control of graded dissipation of expansion stress, self-repairing of microcracks and ion / electron dual-path conduction are realized; the three core problems of electrode pulverization caused by volume expansion, interface impedance sharp increase and long circulation capacity attenuation are thoroughly solved.

A method of making porous carbon particles is disclosed. The method includes: (A1) making a solution including a magnesium organic salt composition; (A2) precipitating particles of the magnesium organic salt composition from the solution; (A3) pyrolyzing the particles of the magnesium organic salt composition to form precursor composite particles including carbon and at least one magnesium compound; and (A4) selectively removing the magnesium compound(s) from the precursor composite particles to convert the precursor composite particles to the porous carbon particles. In some implementations, the at least one magnesium compound includes MgO. A related method of forming silicon-carbon composite particles is also disclosed. Porous carbon particles, silicon-carbon composite particles, anode electrodes, lithium-ion rechargeable batteries, and other related processes and components are also disclosed.

The invention discloses straw carbon-based carbon particles and a manufacturing device and method, and relates to the technical field of agricultural ecological environmental protection equipment.The method comprises the following steps that S1, straw is subjected to component separation treatment, and a liquid component, a carbonized precursor rich in lignin and a fiber base material containing cellulose are obtained; s2, performing carbonization treatment on the carbonized precursor to obtain biochar; dissociating the fiber base material to obtain a fiber inner core material; s3, the liquid component serves as an adhesive, the fiber inner core material serves as a particle inner core, biochar serves as a coating outer layer, and carbon particles of a core-shell structure are prepared through a forming technology. Straw is subjected to component separation before carbonization, directional utilization of all components of straw is achieved, compared with an existing mode that straw is directly carbonized and returned to the field, the carbon particles are more environmentally friendly, and the cost is reduced. The carbon particles prepared by the method are beneficial to subsequent fermentation and field application, can reduce the risk of secondary pollution such as dust raising, are beneficial to regulation and control of the soil carbon release process, and improve the comprehensive utilization efficiency of straws.

The invention provides a sodium-ion battery negative pole piece and a sodium-ion battery, and relates to the field of sodium-ion batteries. The negative pole piece comprises a base material, a first hard carbon layer and a second hard carbon layer, the first hard carbon layer is arranged between the base material and the second hard carbon layer; the first hard carbon layer and the second hard carbon layer respectively and independently comprise the following raw materials in percentage by mass: 80-97% of hard carbon particles, 1-8% of a conductive agent, 1-6% of a binder and 1-6% of a dispersing agent, wherein the total mass of the raw materials of the first hard carbon layer and the second hard carbon layer is 100%; wherein the particle size of the hard carbon particles in the first hard carbon layer is larger than that of the hard carbon particles in the second hard carbon layer; the interlamellar spacing of the hard carbon particles in the first hard carbon layer is smaller than the interlamellar spacing of the hard carbon particles in the second hard carbon layer. According to the structural design, differentiated transmission and storage of sodium ions in different active layers are realized, so that the energy density, the rate capability and the cycling stability of the negative electrode material are synergistically optimized, and the comprehensive performance of the sodium ion battery is comprehensively improved.

The invention relates to a primary cathode layer preparation composition comprising a low molecular weight polyacrylic binding agent and carbon particles. The invention also relates to the use of this composition for preparing a cathode, as well as the cathode itself, which can be used for manufacturing secondary battery cells.

The application belongs to the technical field of electrode materials, and particularly relates to a silicon-carbon negative electrode material based on vertical graphene and a preparation method and application thereof. The method comprises the following steps: preparing mixed slurry containing nanosilicon-based material and micrometer graphite material; performing spray drying treatment to obtain silicon-carbon composite particles; performing sintering treatment on the silicon-carbon composite particles under a protective atmosphere, and performing screening to obtain micrometer porous silicon-carbon particles; and performing chemical vapor deposition treatment on the porous silicon-carbon particles under the condition of containing carbon source gas and etching atmosphere, to obtain the silicon-carbon negative electrode material based on vertical graphene. Vertical graphene nanosheets are grown in the internal pores and outer surface of the porous silicon-carbon particles, to form a developed and robust conductive network with high mechanical strength and structural stability, and to relieve the volume expansion of the silicon-based material in the lithium intercalation process. Meanwhile, the problem of low bulk density of the silicon-based material is solved in the secondary granulation process, the volume expansion effect of the silicon-based material is inhibited, and the rate charge-discharge performance is improved.

Carbon particles comprising at least 97 wt% carbon, based on the total weight of the carbon particle, at most 0.2 wt% impurities, based on the total weight of the carbon particle, at least 0.08 wt% boron, based on the total weight of the carbon particle, and at most 0.05 wt% boron carbide, based on the total weight of the carbon particle.

This solid electrolytic capacitor includes a first electrode, a dielectric layer covering at least a part of the first electrode, and a second electrode covering at least a part of the dielectric layer. The second electrode includes a solid electrolyte layer, a conductive carbon layer covering at least a part of the solid electrolyte layer, and a metal particle layer covering at least a part of the carbon layer. The solid electrolyte layer includes a pyrrole electrolytic polymerization layer, the carbon layer includes carbon particles and a binder, and the binder includes rubber particles.

The invention relates to an alloy carbon-based interface layer composite negative electrode with high interface stability and a preparation method and application thereof.The alloy carbon-based interface layer composite negative electrode comprises a lithium-loving alloy and a three-dimensional mixed carbon-based interface framework layer arranged on the surface of the lithium-loving alloy, and the three-dimensional mixed carbon-based interface framework layer comprises a one-dimensional carbon fiber material and a zero-dimensional carbon particle material with the mass ratio being 1: 45-1: 4; according to the lithium-loving alloy, a lithium-loving layer is arranged on the surface of metal lithium, the lithium-loving layer accounts for 0.001 wt.%-20.0 wt.% of lithium metal, in the inert argon atmosphere, the three-dimensional mixed carbon-based interface framework layer and the pressed lithium-loving alloy are attached and rolled, and the carbon-based interface is modified to the surface of the lithium-loving alloy. Compared with the prior art, the preparation method has the advantages that huge volume change in negative electrode side long circulation can be slowed down, the problems of overgrowth of dendrites, loss of active lithium and the like are relieved, and the electrochemical performance and safety of the battery are improved.

The invention discloses a rare earth silicon carbon composite deoxidizer with a double-component design. The deoxidizer comprises the following components in percentage by mass: 20-30% of rare earth silicon iron alloy particles with the particle size of 5-10 mm, 70-80% of carbon particles with the particle size of 1-5 mm, and a binder, wherein the first deoxidizer comprises the following components in percentage by mass: 20-30% of rare earth silicon iron alloy particles with the particle size of 5-10 mm; and the second deoxidizer comprises the following components in percentage by mass: 80-90% of rare earth ferrosilicon alloy particles with the particle size of 5-10 mm, 10-20% of carbon particles with the particle size of 1-5 mm, and the balance of a binder. The invention also discloses a deoxidation method during use. According to the deoxidizing method, the deoxidizing efficiency is high, the cost is low, safety and stability are achieved, deoxidizing products are few, the performance of steel is not affected, and meanwhile the deoxidizing agent capable of replacing expensive aluminum materials and the deoxidizing method capable of being accurately controlled are achieved.

The invention discloses a method for rapidly evaluating the electrochemical performance of a silicon-carbon negative electrode material of a lithium battery, which comprises the following steps of: preparing a dispersing agent A according to a proportion, and stirring and dispersing the dispersing agent A to obtain slurry A; adding a binder B into the slurry A, and performing nanoscale dispersion to obtain slurry B; adding a silicon-carbon single sample and a conductive agent into the slurry B, and uniformly stirring and dispersing to obtain slurry C; coating the slurry C on the surface of a copper current collector, drying and rolling to form a pole piece; and assembling the pole pieces into a CR2032 button cell, and carrying out an electrochemical performance test. According to the invention, accurate and rapid analysis and evaluation of the electrochemical performance of the lithium battery silicon-carbon negative electrode material are realized mainly through design of a nano dispersion process of silicon-carbon particles, matching of a dispersing agent and a binder, rapid testing of the battery and other process designs.

The application discloses a kind of high shielding property graphene conductive ink and preparation method thereof, wherein, the steps of preparation method include: graphene is treated with plasma activation, after being treated with modifier soaking, with deionized water, steric stabilizer ultrasonic dispersion is carried out, and activated graphene dispersion is obtained;Silver-coated carbon particle dispersion is prepared, mixed with amino-modified graphene, deionized water, catalyst I after, adjust pH to 7~8, ultrasonic treatment is carried out, and activated conductive filler is obtained;Silane coupling agent hydrolysate pretreatment polyamide acid resin is added to the activated conductive filler, thixotropic agent, anti-settling agent and leveling agent are preheated to 35~40 DEG C, after high-speed shearing and three-roll mill grinding treatment, high shielding property graphene conductive ink is obtained.Thereby the graphene conductive ink obtained is strong, shielding property is high, and excellent in performance, suitable for spraying or screen printing process.

The present application provides a kind of porous carbon and carbon nanotube combined preparation system and method, including activation fluidized bed, carbonization fluidized bed and carbon nanotube preparation fluidized bed;Activation fluidized bed is filled with energy carbon carrier, after oxygen and activating gas are imported, energy carbon carrier and oxygen occur combustion heat release, make activation fluidized bed temperature rise, first tail gas formed is imported into carbonization fluidized bed filled with carbon particle precursor, carbon particle precursor is carbonized under the action of high temperature carried by first tail gas, and generates carbide particle, and the second tail gas containing C1-C 30 ;Carbide particle is transported to activation fluidized bed, by controlling the gas flow rate of first gas inlet, so that carbide particle is always in the upper part of activation fluidized bed, and makes carbide particle activate in activating gas, and forms porous carbon particle;Second tail gas enters carbon nanotube preparation fluidized bed, and under the action of nanometer metal catalyst, C1-C 30 In it, is converted into carbon nanotube to realize low-cost co-production of porous carbon and carbon nanotube.

The invention relates to an activated carbon washing wastewater zero discharge device and a discharge process thereof. The device comprises a carbon deposition tank, a resin tank, an impurity-removed storage tank, membrane equipment, a concentrated water storage tank, low-temperature evaporation equipment, an aeration stirring barrel, a cloth bag filter, a transfer barrel and an automatic fine filter which are sequentially connected through pipelines. The process comprises the following steps: (1) precipitating activated carbon washing wastewater through a carbon precipitation tank, and removing suspended carbon particles to obtain pretreated wastewater; (2) pumping the pretreated wastewater in the step (1) into a resin tank filled with modified cation exchange resin, and removing cation impurities to obtain an impurity-removed liquid; (3) concentrating and separating the impurity-removed liquid in the step (2) through membrane equipment to obtain concentrated water and fresh water, and recycling the fresh water; (4) concentrating the concentrated water obtained in the step (3) through low-temperature evaporation equipment until the concentration of phosphoric acid is 60% or above to obtain a concentrated solution, and recycling condensed water; and (4) decoloring and filtering the concentrated solution in the step (4) to obtain regenerated pure phosphoric acid, and recycling the regenerated pure phosphoric acid.

The application discloses a silicon carbide crystal growth device and a growth method, and particularly relates to the field of silicon carbide crystal growth. The silicon carbide crystal growth device comprises a crucible, a seed crystal tray, at least one layer of inert metal mesh and a bottom plate; the crucible is electrically connected with a positive electrode or a negative electrode of a first power supply, and the crucible comprises a first area for placing silicon carbide raw materials; the seed crystal tray is arranged above the crucible; the at least one layer of inert metal mesh is arranged between the first area and the seed crystal tray through an electrode rod, and the electrode rod is electrically connected with a positive electrode or a negative electrode of a second power supply; the bottom plate is arranged below the crucible, and the bottom plate is electrically connected with a positive electrode or a negative electrode of a third power supply; wherein at least one of the crucible, the electrode rod and the bottom plate is electrically connected with the first power supply, the second power supply and the third power supply. The silicon carbide crystal growth device can prevent carbon particles from entering the silicon carbide crystal and affecting the quality of the silicon carbide crystal.

The invention discloses a processing method for improving the compaction density of capacitor carbon and the volume specific capacity of an electrode material, and the method comprises the steps: carrying out the grinding and shaping of an activated and pore-formed capacitor carbon raw material, and obtaining the spherical capacitor carbon powder; carrying out washing and roasting pretreatment on the sphere-like capacitance carbon powder to obtain pretreated capacitance carbon; mixing the pretreated capacitor carbon to obtain uniform mixed capacitor carbon powder; and calcining the mixed capacitor carbon powder for 0.5-2 hours at the temperature of 500-900 DEG C in a protective gas atmosphere to finally obtain a capacitor carbon finished product with improved compaction density and volume specific capacity. By accurately controlling particle size distribution and proportion of raw materials and combining a shaping process and a heat treatment process, accumulation gaps among capacitor carbon particles are reduced, and the compaction density is improved; the optimized particle morphology enhances the fluidity of the material and the forming strength of the electrode, so that the volume specific capacity of the electrode material is obviously improved.

The present application relates to a method for extracting magnesium from marine waste plastics and seawater and desalination of seawater, which comprises the following steps: S00, filtering seawater containing waste plastics; S10, wet grinding the solid waste plastics to obtain waste plastic particles, and preparing lime milk simultaneously; S20, mixing the secondary concentrated seawater, the lime milk and the waste plastic particles and adding them into a magnesium hydroxide precipitation tank; S30, after the mixture of the magnesium hydroxide precipitation and the waste plastic particles is dewatered by pressure filtration, the mixture is sent into a calcination pyrolysis furnace to prepare magnesium oxide by calcination; S40, the pyrolysis gas is dewatered and used as a heating fuel gas to generate electricity for recycling, and the remaining part is stored for recycling; S50, the mixture of the magnesium oxide and the carbon particles is used to prepare solid crystalline magnesium and carbon monoxide gas, and the carbon monoxide gas is stored for recycling. The present application has the advantages of comprehensive utilization of marine waste plastics for energy utilization, preparation of desalinated seawater and extraction of magnesium from seawater, and comprehensive utilization of pollutants and low production cost.

The present application belongs to the technical field of fly ash separation, and particularly relates to a fly ash separation device based on fly ash extraction of glass microbeads. The present application comprises a magnetic bead separation assembly, a floating bead separation assembly and a carbon particle flotation assembly, the tailing channel of the carbon particle flotation assembly is communicated with the sink bead discharge pipeline; the discharge port of the magnetic bead separation assembly comprises a magnetic bead outlet and a dry material outlet, the dry material outlet is communicated with the negative pressure cavity of the negative pressure chamber, the water cavity of the negative pressure chamber is communicated with the water tank via the first pressure pump; the floating bead separation assembly comprises a floating bead flotation tank and a liquid inlet tank, the upper impeller and the lower impeller are arranged in the liquid inlet tank, the jet path of the nozzle is horizontally directed to the blade of the upper impeller, the nozzle is arranged at the bottom of the liquid inlet tank, and the overflow port of the floating bead flotation tank constitutes the floating bead outlet. The present application has the advantages of clear and reasonable process flow, effectively ensures the separation efficiency, and can sequentially separate the high-content magnetic beads, floating beads, carbon particles and sink beads according to the process flow, so as to facilitate subsequent processing.

Particle or hadron therapy is used on abnormal tissue using carbon atoms, protons, or helium atoms run through a linear accelerator and then directed at the target in the body. This can be used to treat, for example, atrial fibrillation, ventricular tachycardia, hypertension, seizures, gastrointestinal maladies, etc. Contouring and gating may be used to account for cardiac and respiratory motion, helping reduce collateral damage.

The invention provides a functional dispersant and a preparation method thereof, positive electrode slurry and a positive plate, and relates to the technical field of batteries. The structural formula of the functional dispersant is shown in the specification, in the formula, R1 or R2 is an anchoring group, and the anchoring group comprises a phosphate group, a phosphate group or an amine group and is used for anchoring iron-lithium particles and carbon particles; r3 is a modified binder group and is used for improving the binding power; wherein x, y, z, m and n are positive numbers greater than 1; x is less than or equal to 30000, y is less than or equal to 30000, z is less than or equal to 500, m is less than or equal to 300, n is less than or equal to 500, and the total molecular weight of the functional dispersant is 2000-50000. According to the functional dispersant, a modified binder group is linked to modified PVP, and the modified binder group and a PVP branched chain jointly form a thicker and more stable three-dimensional space protection layer around particles, so that the mechanical stability and integrity of an electrode structure are improved, and the compaction density of a pole piece is improved; and the use amount of a common binder in the positive electrode slurry is reduced, and the addition proportion of the active substance is improved.

The present application relates to the technical field of carbon composite materials, in particular to a concave porous silicon-carbon particle with high ion conductivity and a preparation method thereof. The concave porous silicon-carbon particle is provided with a part of surface concave, forming a crosslinked body of silicon debris and carbon nanomaterials with a continuous boundary and an arc shape. Compared with the prior art, the nanocarbon material in the particle is in an ordered structure, improving the internal conductive and ion transmission capacity of the silicon-carbon particle, and also serving as a buffer structure to absorb the expansion stress of silicon, avoiding the cracking of the silicon-carbon particle and the cracking and falling of the negative electrode.

The present invention aims to provide a method for preparing and applying a hydrotreating protectant for heavy residue oil, belonging to the field of catalyst preparation. The method includes the following steps: preparing an alumina sol and adding spherical carbon particles to the alumina sol; mixing the materials evenly and then forming droplets; drying and calcining the formed material to obtain an alumina support with spherical pores; hydrothermally treating the alumina support with spherical pores in an organic ammonium solution; drying and calcining the treated material to obtain another alumina support; impregnating the alumina support with an impregnation solution containing an active metal component; and drying and calcining the impregnated support to obtain the hydrotreating protectant. The hydrotreating protectant prepared by this method has large surface pores with good permeability and high internal pores that can accommodate metal impurities. This catalyst is suitable for the field of heavy residue oil hydrotreating.

The invention relates to a sludge incineration treatment system, and belongs to the field of sludge treatment. Comprising a sludge feeding system, an incineration system, an ash delivery system and an ash circulation system. By means of the double-sleeve type ash feeding pipeline, the air feeding quality can be improved, the problem that the rear section of a traditional air feeding system is small in pressure and prone to blockage is solved, high-pressure blowing is matched, and the stability of a sludge feeding system is guaranteed. A wear-resistant protective sleeve is additionally arranged at the elbow of the ash conveying pipeline, so that normal operation of equipment is ensured. The sleeve type high-temperature protection pipe is additionally designed, so that the problem of pipeline breakage caused by thermal expansion is completely eradicated; through the design structure of the valve, the flashboard is prevented from being clamped due to the fact that ash residues are accumulated in the supporting plate or gaps. By designing a cooling water line of the cooler, the steam heat efficiency of the circulating fluidized bed boiler is ensured. And an ash circulating system is additionally arranged, carbon particles which are not completely combusted in ash are fed into the hearth again, and the fuel utilization rate is increased.

The invention provides a porous carbon material for high-temperature flue gas filtration, and a preparation method and application thereof, and the preparation method comprises the following steps: mixing carbon powder, a metal oxide and an adhesive to obtain prefabricated carbon particles; sintering the prefabricated carbon granules in a reducing atmosphere to obtain sintered carbon granules; roasting the sintered carbon granules in a chlorine atmosphere to obtain roasted carbon granules and roasted flue gas; the roasted carbon particles are subjected to acid pickling and then dried, and the porous carbon material for high-temperature flue gas filtration is obtained. The mixing mass ratio of the carbon powder to the metal oxide to the adhesive is 1: (0.25 to 0.5): (0.15 to 0.3). The preparation method is simple in steps and convenient to operate. And the prepared porous carbon material has a relatively high specific surface area, and meets the high-performance requirements of the fields of industrial production and the like on a high-temperature flue gas filtering material.

The invention relates to the technical field of kitchen utensils, and discloses a furnace end and a burner. The furnace end comprises a furnace end seat, an injection pipe and a nozzle assembly, wherein the injection pipe is connected to the furnace end seat; a fuel gas flow channel, an air flow channel and a gas mixing cavity are formed in the nozzle assembly, the air flow channel is annularly arranged on the periphery of the fuel gas flow channel, an inlet of the fuel gas flow channel is communicated with the fuel gas supply unit, an inlet of the air flow channel is communicated with the air supply unit, and an outlet of the fuel gas flow channel and an outlet of the air flow channel are both communicated with an inlet of the gas mixing cavity. And an outlet of the gas mixing cavity is communicated with an inlet of the injection pipe. The furnace end can adjust the inlet amount of primary air so as to guarantee sufficient combustion of fuel gas, so that the combustion efficiency is improved, pollutants such as carbon monoxide, black smoke and carbon particles caused by insufficient air inlet amount can be avoided, and pollution to the environment is reduced.