197results about How to "No churn" patented technology

The invention relates to temperature adjusting humidity adjusting coating and a preparation method thereof. The temperature adjusting and humidity adjusting coating comprises thermal insulation undercoat, phase transition energy storage intermediate coat and heat conduction humidity adjusting finish. The undercoat insulates heat, and the phase transition energy storage intermediate coat transmits indoor energy through the finish and stores energy through the phase transition, and thereby effectively adjusting indoor temperature. The phase transition energy storage intermediate coat and the humidity adjusting function of the finish impart the whole coating temperature adjusting and humidity adjusting function. In addition, the temperature adjusting and humidity adjusting coating has the advantages of being fireproof, waterproof, antifouling, mechanical, capable of eliminating peculiar smell, sterilizing, insulating heat, removing sound, protecting environment and the like. The temperature adjusting and humidity adjusting coating is applicable to various kinds of constructional coating.

Two-way cement-soil mixer is a kind of construction machinery equipment suitable for soft soil foundation treatment. The mixer consists of body (1), power transmission system (2), outer drill rod (3), inner drill rod (4), drill bit ( 5) Composition, wherein the power transmission system is located on the upper part of the fuselage (1), the inner drill rod (4) is located in the outer drill rod (3), and the inner drill rod (4) and the inner drill rod in the power transmission system (2) The rod power transmission system connection flange (211) is connected, the outer drill rod (3) is connected with the outer drill rod power transmission system connection flange (25), and the drill bit (5) is located at the bottom of the inner drill rod (4). The machine is easy to construct, easy to operate, and easy to master. The two-axis two-way rotation drives two sets of mixing blades to rotate in two directions at the same time, which can ensure the mixing amount of cement slurry in the pile body, and there will be no slurry phenomenon; at the same time, it can ensure that the pile body cement The soil is fully stirred evenly to ensure the quality of the pile and the quality of the pile body; the efficiency is more than doubled.

The present invention discloses an acidic high sulfate organic wastewater treatment process and apparatus. The present invention belongs to the technical field of wastewater treatment. The specific process comprises the steps of: (1) neutralization and precipitation treatment: using lime milk to adjust PH of wastewater, and forming CaSO4 precipitation separated from the water; (2) first-stage anaerobic treatment, entering the first-stage anaerobic treatment after neutralization and precipitation treatment, introducing nitrogen into the bottom of an anaerobic reactor with stirring and blowing off, parsing H2S from an aqueous phase into a gas phase above a liquid level, introducing the H2S in the gas phase to a dry desulfurizer for desulfurization, and re-introducing the sulfur removed nitrogen into the first-stage anaerobic reactor for recycling through a blower; and (3) second-stage anaerobic treatment, introducing the sulfur removed wastewater into a second-stage anaerobic reactor to complete an anaerobic methane production reaction, and taking second-stage anaerobic effluent into an aerobic reaction tank for further processing. According to treatment process disclosed by the present invention, inhibition and toxic effects generated by the SO42- and S2- to the anaerobic biological treatment can be effectively reduced, and sewage treatment effects can be improved.

The invention provides a method for producing lactic acid by using glycerin and a special catalyst for the production of the lactic acid by using the glycerin. The catalyst provided by the invention is obtained by loading 0.1 to 30 mass parts of an active ingredient onto 100 mass part of carrier, wherein active ingredient is (1) Pt or (2) a composite of Pt and other noble metals. The catalyst can be used in the production of the lactic acid by using the glycerin. In the presence of the catalyst of the invention, the glycerin can be converted into the lactic acid effectively under a mild reaction condition. The catalyst of the invention has the advantages of high activity and selectively, easy preparation, low price, easy industrialization, long service life, loss prevention and good application prospective.

The invention relates to a method for processing ready-to-eat clams, which comprises the following steps: firstly, selecting pollution-free alive clams, temporarily breeding the clams, then washing the clams, and removing shells through steaming to obtain integral clam meat; and using the clam meat as a raw material, performing high temperature baking for sterilization after washing, draining away the water, salting, and dehydrating; then vacuumizing and sealing the clam meat; and performing secondary sterilization on the clam meat to obtain the ready-to-eat clams. The method better keeps the completeness and the nutrient content of the clam meat and the clam meat can be eaten after opening the package. The method is simple and easy to perform, the processed clam product has no nutrient loss, and the color and luster of the product is natural, thus the convenience for eating the clam is improved. The ready-to-eat production clam can be stored for six months to one year at normal temperature, the cost can be saved, and the product is easy to store and circulate.

The invention discloses a bio-preparation method for production of high-purity xylo-oligosaccharide and coproduction of arabinose and xylose. The method comprises the following steps of: washing hemicellulose-enriched biomass, performing size mixing pretreatment, adding xylanase, performing enzymolysis, and separating and purifying to obtain mixed liquid glucose; concentrating the mixed liquid glucose until the mass concentration is 50 to 70 percent, and performing chromatographic separation to sequentially obtain AD phase, BD phase, CD phase and BD phase, and concentrating the BD phase to obtain a high-purity xylo-oligosaccharide syrup liquid product; concentrating the CD phase, mixing with cellulosic materials, drying, and crushing to prepare fiber feed; performing yeast fermentation on the AD phase to remove glucose, removing impurities, purifying, concentrating and performing chromatographic separation to obtain the high-purity xylose liquid and arabinose liquid; concentrating the xylose liquid, crystallizing, separating and drying to obtain crystallized xylose; and concentrating arabinose liquid, crystallizing, separating and drying to obtain crystallized arabinose. The invention also provides a bio-preparation method for arabinose and xylose.

The invention discloses a core shell catalyst by taking hydrotalcite as a shell and a molecular sieve as a core as well as a preparation and an application thereof. According to the invention, divalent metal source and aluminum species in a core-shell molecular sieve are used for forming a hydrotalcite compound on the surface of the molecular sieve, and the core-shell structure molecular sieve by taking the molecular sieve as the core and the petal hydrotalcite as the shell is formed; after the molecular sieve is reduced, the nano-grade metal-modified molecular sieve catalyst having uniform size, high dispersibility, excellent heat stability and high universality is obtained, and can be used for a catalytic reaction for hydrogenation synthesis of m-dinitrobenzene to obtain m-phenylenediamine. compared with the prior art, the preparation process is simple, the metal atom utilization rate is high, applied metal source is almost completely reacted, no loss is generated, cost is reduced, and pollution on environment is reduced, industrial production is easy, and a series of different metal-modified molecular sieve catalysts can be prepared according to the modifiable character of the composition elements of the hydrotalcite and diversity of a topological structure of the molecular sieve.

The invention discloses a fire protection foam system for a fire truck. The fire protection foam system comprises a water pot and a foam liquid pot which are used for storing fire protection media, a water pump and a foam pump which are used for pumping the fire protection media, a fire nozzle for outputting the fire protection media, a foam uniformly mixing tube and an air compressor, wherein the outlet of the foam uniformly mixing tube is communicated with the inlet of the fire nozzle, and the inlet of the foam uniformly mixing tube is respectively communicated with the liquid outlet of thewater pump and the liquid outlet of the foam pump; and the compressed air outlet of the air compressor is communicated with the inlet of the foam uniformly mixing tube. The fire protection foam system for the fire truck is provided with compressed air supply equipment; when the fire protection foam system is used, the compressed air and mixed liquid of water and foams firstly enter the foam uniformly mixing tube and are pre-foamed and then jetted by the fire protection fire nozzle with low water consumption. On the basis of the fire protection foam system, the invention also provides the firetruck, which comprises a chassis, a lifting arm frame, a working platform and the fire protection foam system for the fire truck; and the working platform is connected with the chassis through the lifting arm frame.

The invention relates to an application of a nickel-based catalyst in preparation of hydrogen through hydrazine decomposition, and concretely provides a load-type nickel-based catalyst prepared from nickel-containing mixed hydroxide or carbonate as a precursor. The catalyst is composed of Ni-M / X, wherein M is one or several metal components selected from Co, Fe, Cu, Zn, Rh, Ru, Pd, Pt, Ir, X is a metal oxide, The load capacity of Ni is 5-90wt%. Addition of the metal M is selectable, and X can be a monocomponent oxide or mixed oxides. The catalyst has characteristics of high reaction activity and good selectivity. Hydrazine or hydrazine hydrate can be decomposed rapidly to prepare hydrogen under action of the catalyst in a condition of 0-100 DEG C, and the selectivity can reach the highest 100%. The catalyst has good stability. Provided is a method for preparing clean hydrogen without CO. The raw materials of the catalyst are easily available, the technology is simple, and the catalyst has good application prospects.

The invention relates to the technical field of fine chemical engineering and discloses a catalyst for preparing isosorbide by utilizing celluloses and a preparation method of the catalyst. The catalyst is a bifunctional catalyst comprising a solid acid loading metal. The bifunctional catalyst disclosed by the invention can be used for realizing the process of catalyzing the celluloses to obtain the isosorbide under the reaction condition that no inorganic liquid acid is added, and avoiding the corrosion problem of equipment caused by using the inorganic liquid acid, and is easy to recycle; the maximum conversion rate of the celluloses can reach 100%, and the maximum selectivity of the isosorbide can reach 55%; the catalyst has very high stability under the existing reaction condition, still maintains the catalytic performance without loss after being cycled for ten times and has low requirements on equipments; and the catalyst is suitable for the existing common industrial production conditions and has very good application prospect.

The invention relates to a health-care food and relative production, especially a deer blood powder capsule and relative production, wherein said production comprises that: putting more than 400deals dried micro deer blood powder into capsule, whose water content is lower than 3%; a, checking, washing and breaking in water, freezing at -26--28Deg. C, putting into disc; b, freezing at freezer for 25-28h, taking out; c, grinding powder to more than 400deals; d, disinfecting and packing into capsule. The invention can hold nourishment, with long quality period.

The invention relates to the technical field of fine chemical engineering and discloses a method for preparing isosorbide based on cellulose. The method comprises the following steps of: adding a cellulose raw material into an airtight high-pressure reactor containing enough water, wherein the reaction pressure is 1-12 MPa, and the reaction temperature is 180-300DEG C; and carrying out hydrolysis, hydrogenation and hydration reactions in water for 0.5-48 hours in the presence of a catalyst to obtain the isosorbide. The catalyst is a metal / solid acid bifunctional catalyst and has the addition amount of 0.03-2.0g / g cellulose. The method disclosed by the invention has low corrosion to equipment as no inorganic liquid acid needs to be added, and is low in cost, simple in reaction system and easy to industrialize; and the catalyst is long in service life and free of loss.

The invention relates to a polymer catalytic membrane containing a palladium metal activity functional layer prepared based on the technology of layer-by-layer self assembly and a preparation method thereof, which belongs to the field of catalytic membranes. According to the invention, polyacrylonitrile (PAN) powder, polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP) are dissolved in N,N-dimethyl formamide (DMF), and a PAN flat base membrane is prepared by using a phase inversion process; then the PAN membrane is soaked in a NaOH solution for treatment, which allows surface of the membrane to hydrolyze so as to produce carboxyl groups, thereby enabling the surface of the membrane to carry negative electric charges; a polyethyleneimine (PEI) solution and a potassium chloropalladate K2PdCl4 solution are fully mixed and react for a certain period of time so as to obtain a coordination compound of polyethyleneimine-palladium (PEI-Pd(II)); the treated flat base membrane is alternatively soaked in a solution containing the PEI-Pd(II) coordination compound and a polystyrene sulfonate (PSS) solution for self-assembly of functional layers on the surface of the membrane, and the amount of the assembled layers is controlled; and finally, the membrane obtained after assembly is soaked in a potassium borohydride KBH4 solution, Pd(II) is reduced to be Pd0, and the PAN catalytic membrane containing the palladium metal particle active layer is prepared.

The invention discloses a microwave resonant atomizer (2) for an electronic cigarette. The microwave resonant atomizer comprises an oil storage unit (21), an atomizing unit (22), an upper cover plate(23) and a suction nozzle (24), wherein a microwave resonant cavity (221) is formed in the internal space of the atomizing unit (22); and a coupling hole (225) is formed in the side wall of the microwave resonant cavity (221), and the outer side wall of the microwave resonant cavity (221) with the coupling hole (225) can be covered with an energy coupling (224). When being applied to the electronic cigarette, the microwave resonant atomizer has the advantages that instant heating is realized, the efficiency is high, heat uniformity is good, non-contact atomization is realized, the low temperature sterilization of tobacco tar can be realized, and the like.

The invention discloses a microwave resonant cavity (221) for an electronic cigarette. The microwave resonant cavity is of a cylinder shape, wherein a second oil guiding component (223) is arranged inthe microwave resonant cavity (221) along the axial direction; and a coupling hole (225) is formed in the side wall of the microwave resonant cavity (221). When being applied to the electronic cigarette, the microwave resonant cavity has the advantages that instant heating is realized, the efficiency is high, heat uniformity is good, non-contact atomization is realized, the low temperature sterilization of tobacco tar can be realized, and the like.

The protective oil and grease is prepared with the materials including lithium hydroxide hydrate, dodecahydroxyl stearic acid, stearic acid, composite antirust agent, composite antioxidant, filming agent, solid stuffing and base oil. It has excellent waterproof performance, antioxidation, anticorrosion, lubricant performance, adhesion performance, salt mist resistance and weather resistance and low cost, and may be smeared directly. The present invention may be used in long term protection of connecting parts and fastening parts in railway, outdoor crown block, crane, etc.

The invention relates to a method of circumgyrating motor end winding laid band, it characterized in that: heating the laid band, the method is: armature is mounded on the machine tool; the laid band is strapped as it is rotated on end part of the armature loop; adopting calorifier to heat laid band directly; the advantages of the invention are that quantity of glue of laid band on loop end part can not be lost.

The invention relates to the technical field of lactic acid preparation and particularly relates to a method for preparing lactic acid through catalyzing glycerol by a supported catalyst. According to the method, the selectivity of lactic acid can reach 70-90%, and the conversion ratio of glycerol can reach 72-100%. The method is characterized in that reaction is carried out on glycerol which serves as a raw material in a high-pressure reactor under anaerobic and alkali source provided alkaline conditions in the presence of supported copper oxide which serves as a catalyst, thereby obtaining lactic acid, wherein a support of the supported copper oxide catalyst contains metal oxides, including MgO, ZrO2, TiO2, CeO2 and ZnO, activated charcoal or hydroxyapatite; the supported copper oxide catalyst is easy to prepare, low in cost and relatively long in service life. The method has the advantages that the reaction temperature and reaction pressure are low, the catalyst activity is high, the selectivity is good, the reaction rate is high, and the process flow is safe and environmental-friendly and the like, so that the industrial prospect is good.

The invention relates to a sulfonated coal loaded TiO2 photocatalyst and a preparation method thereof. A supported nanocrystal TiO2 photocatalyst taking semicoke sulfonated coal as a substrate is prepared through a microwave-liquid phase deposition method by taking high-polymer semi-organic matter sulfonated coal as a carrier and titanium sulfate as a titanium source, wherein the semicoke sulfonated coal as the carrier has the particle size of 0.15-0.3mm. The process comprises primary microwave radiation, centrifugal separation, multiple washing and suction filtration, secondary microwave radiation, ultrasonic wave washing and tertiary microwave radiation. The sulfonated coal loaded TiO2 photocatalyst prepared by the invention is better in adsorption property, high in photocatalytic performance, convenient to recycle, free of loss, incapable of weakening the photocatalytic performance, and suitable for wastewater treatment. The preparation method is simple in process, easy to operate, free of pollution and the like so as to be suitable for industrial production.

The invention provides a tank bottom sludge discharging device for an oilfield sedimentation tank. A tank body is provided with a sludge bearing bottom plate and a sludge collection chamber, the sludge collection chamber is connected with a sludge discharging pump, a sedimentation tank center pipe is connected with a center support connected with a driven gear, the driven gear is in meshed connection with a driving gear, a shaft of the driving gear is connected with a gear motor through a coupling, the gear motor is fixedly connected with a sleeving pipe outside the tank top, four groups of frameworks are fixedly and radially connected around a shaft of the driven gear, bottoms of the frameworks are connected with sludge scraping plates. Sludge is discharged through a tank bottom sludge removal system, the problem of sludge sedimentation at the tank bottom is solved, sludge is discharged thoroughly, no dead zone exists, water resources are saved, the device adopts a mechanical structure and is stable in operation and reliable in performance, a mechanical part of the tank bottom of the sedimentation tank is free of welding structures, a bolt fastening connection method is adopted, an ultrasonic interface sensor is arranged, the automatic tank bottom sludge removal system sets parameters such as the starting frequency, the working time and the like of the device through programs, sludge collection and sludge discharging are controlled automatically and regularly through the programs, and full-automatic operation of the system is realized.

The invention relates to an instant sea food, in particular to an instant abalone with soup and a preparation method thereof. The instant abalone with the soup uses abalone meat and an abalone soup as raw materials and is prepared by the following steps: heating and seasoning the abalone meat, mixing the treated abalone meat with the prepared abalone soup according to the weight ratio of 0.1-0.3 for encapsulation, and then sterilizing, wherein the abalone meat is chosen from fresh and alive Haliotis Discus Hannai Ino. By carrying multistage heating and seasoning on the abalone meat with purpose-made seasonings, the instant abalone with the soup maintains the original flavor of the abalone and the completeness in shape, loses no nutriment, and has full mouthfeel and intense fragrance; the mated soup in the package facilitates the circulation and carrying, and provides multiple eating options; no preservative and the like are added in the treating process; and the instant abalone with the soup is sterilized, has the advantages of convenient eating, rich nutrition and health care, and can be stored for 12 months based on shelf life validation tests.

The invention relates to a titanium sponge loading TiO2 photocatalyst and a preparation method thereof. The titanium sponge loading TiO2 photocatalyst is prepared by purifying raw materials and carrying out oxidation reaction under the reaction temperature of 75-250 DEG C and the reaction atmospheric pressure of 2-10 with porous foam metal titanium sponge as a carrier and a titanium source. The photocatalyst has the advantages of large specific surface area, strong adsorbability, higher photocatalytic performance both under UV lights and in the sun, recovery and repeated recycle without photocatalytic activity declining, simple procedure, safe operation, little equipment investment, low production cost, no secondary pollution and the like and is particularly suitable for waste water treatment.

The invention provides a hydrolysis catalyst for cellulose hydrolysis, which can be used for catalyzing and hydrolyzing cellulose into glucose at high selectivity. At 160 DEG C, the hydrolysis ratio of catalyst to cellulose approaches 70%, the hydrolysis capacity is good, and the catalytic efficiency is high. Compared with the reported catalyst, the catalyst of the invention has the advantages of simple preparation and low price. When the catalyst is used for catalyzing cellulose hydrolysis reaction, hydrogen gas does not need to be added additionally, and no noble metals exist, thus the price is low. The invention is characterized in that the precursor of the silicon source can be at least one of the following silicon-containing compounds: tetraethoxysilane (TEOS), tetrapropoxysilane (TPOS), tetramethoxysilane (TMOS) or sodium silicate (Na2SiO3); and the cellulose can be at least one of the following celluloses: microcrystalline cellulose and natural cellulose.

The invention discloses a preparation process of conditioning steak which comprises the following steps: pre-processing a raw material, then adding the ground beef to a vacuum tumbler for rolling, adding the prepared ingredients for seasoning, performing sterilization and lamination, rapidly placing the moulded beef into a cold warehouse for rapid freezing for 30-40 min at the temperature of -30DEG C, wherein after quick freezing, the center temperature of the product must reach -18 DEG C, demoulding the beef after quick freezing and unfreezing the beef, and cutting the beef into pieces, after the sliced steak is qualified, performing vacuum packaging on the finished product and storing the product at the temperature of -18 DEG C. The preparation process utilizes a recombination technology of the beef to process the conditioning steak, and the recombinant meat is recombined and re-formed by means of recombination technology, and sold after being frozen, and the process not only can improve the utilization rate of the minced meat, but also enriches the product types of the steak.

The invention relates to a floating bed catalytic ozonation reactor and a method therewith for treating waste water. A floating catalyst bed assembly is installed in the reactor and is formed by an upper fixing frame, a lower fixing frame and a hanging rope. A porous annular plate is arranged on the hanging rope. One end of a flexible floating catalyst is fixed on the porous annular plate. A water distributing device is arranged above the reactor and is used for uniformly distributing waste water to all parts. An air inlet pipe and a water distributor are arranged under the reactor and are used for uniformly diffusing gas. In the invention, by means of the light-weight flexible fiber-like catalyst arranged on the floating bed, the catalyst is uniformly distributed in the space of the reactor, and with disturbance of ozone bubbles, the reactor is improved in gas-solid-liquid mass transfer efficiency and ozone utilization rate, is reduced in system resistance, and can decompose and mineralize refractory organic substances in waste water effectively.

The invention discloses micro-power municipal sewage treatment equipment which comprises a tank body as well as a micro-power aeration system, wherein a water inlet tube and a water outlet tube are respectively arranged at the upper parts of two sides of the tank body; a partitioning plate parallel to the tank wall is arranged on one side of the tank body, close to the water inlet tube; the partitioning plate is used for partitioning the tank body into a water inlet area and a reaction area of which the bottoms are mutually communicated; an active sludge layer, a suspension filler layer, a light ceramsite layer and a clean water layer are sequentially arranged in the reaction area from bottom to top in sequence; the micro-power aeration system comprises an aeration pipeline arranged on the active sludge layer, an aerator connected with the aeration pipeline and a power device arranged outside the tank body and used for supplying power to the aerator. The invention further discloses a process for sewage treatment by using the equipment. The equipment and the process disclosed by the invention have the advantages of good treatment effect, high efficiency in nitrogen and phosphorus removal, sludge loss prevention, sludge dead angle prevention, small occupied area, investment preservation, low operation cost, low energy consumption, convenience in operation and management, flexibility in process and the like.

The invention provides a liquid vacuum concentration device and method. The liquid vacuum concentration device comprises a box, an evaporation chamber, a separation chamber, a condenser and a vacuum pump, wherein the box is provided with an internal space; the evaporation chamber is provided with a liquid inlet and a liquid outlet, liquid enters the evaporation chamber through the liquid inlet and is heated in the evaporation chamber, and finally concentrated liquid is discharged outside through the liquid outlet; the separation chamber is communicated with the evaporation chamber through fluid, liquid and bubbles generated by heating the liquid enter the separation chamber from the evaporation chamber to achieve gas and liquid separation in the separation chamber, and liquid obtained after gas and liquid separation flows back to the evaporation chamber from the separation chamber; gas obtained after gas and liquid separation enters the condenser from the separation chamber and is condensed into condensed water in the condenser; by means of the vacuum pump, the evaporation chamber, the separation chamber and the condenser are in the vacuum state. By means of the liquid vacuum concentration device, original components can be kept not to be lost, and energy consumption is low.

The invention discloses a preservation method of dendrobium officinale. The preservation method includes the following steps that after being picked, the fresh dendrobium officinale is subjected to impurity removal treatment, wherein impurity removal treatment is completed within 1 h after the dendrobium officinale is picked; the dendrobium officinale is cooled to 1 DEG C-3 DEG C; the dendrobium officinale is cleaned at 1 DEG C-3 DEG C and then drained off; the cut end of the dendrobium officinale is dipped in 1-methylcyclopropene for 70 s-100 s and then taken out; the dendrobium officinale is fumigated through a preservative at 1 DEG C-3 DEG C, wherein fumigation time is kept within 16 h-20 h; the dendrobium officinale is placed in a constant-temperature preservation box to be preserved. The preservation method is good in preservation effect, long in preservation time, easy to implement and low in cost.

The invention relates to a health-care food and relative production, especially a deer blood powder capsule and relative production, wherein said production comprises that: putting more than 400deals dried micro deer blood powder into capsule, whose water content is lower than 3%; a, checking, washing and breaking in water, freezing at -26--28Deg. C, putting into disc; b, freezing at freezer for 25-28h, taking out; c, grinding powder to more than 400deals; d, disinfecting and packing into capsule. The invention can hold nourishment, with long quality period.

The invention discloses an energy-saving furnace with a cyclone generating device, aiming to provide an energy-saving furnace with more complete mixing and combustion, more stable combustion, higher safety and better energy-saving effect. The invention comprises a furnace (6), a furnace chamber (1), a mesh furnace core (2), a blower fan (3), and a cyclone generator. The upper part of the furnace chamber (1) is a gas and air rotating mixing zone (21), and the lower part is The air intake area (22), the mesh furnace core (2) is arranged above the gas and air rotating mixing area (21) in the furnace chamber (1), the fan (3) communicates with the air intake area (22), and the furnace chamber ( 1) There is a gas channel (4) extending into the gas and air rotating mixing area (21), and the cyclone generating device includes several air outlet nozzles (51) arranged in the gas and air rotating mixing area (21). (51) are distributed in a circle and inclined in the same direction. The air outlet nozzle (51) is a passage connecting the air intake area (22) and the gas and air rotating mixing area (21). The air outlet direction of the air outlet nozzle (51) is uniform Either clockwise or counterclockwise. The invention can be widely used in the field of stoves.