104results about How to "Rapid dilution" patented technology

The invention relates to a condensed multi-enzyme medical cleaning agent. The cleaning agent contains surfactants, a detergent auxiliary agent, a solubilizing agent, an enzymic preparation, a foam inhibitor and a preservative, wherein the surfactants are a non-ion surfactant and an anion surfactant. The cleaning agent comprises the following formula components in percentage by weight: 5 to 10 percent of alkoxyl fatty alcohol, 3 to 5 percent of alkyl polylucoside, 5 to 10 percent of alkanol polyether, 5 to 10 percent of sodium xylene sulfonate, 0.5 to 1.5 percent of sodium sulfate, 0.5 to 1 percent of calcium chloride, 2 to 4 percent of disodium ethylene diaminetetraacetate, 5 to 10 percent of hydrogenated castor oil, 6 to 12 percent of dipropylene glycol monomethyl ether, 5 to 10 percent of glycerol, 2 to 6 percent of proteinase, 1 to 5 percent of amylase, 1 to 5 percent of lipase, 0.5 to 1 percent of cellulase, 0.1 to 0.5 percent of methylparaben and propyl hydroxybenzoate preservative, 0.1 percent of essence, 0.1 percent of pigment and the balance of deionized water. Through the cleaning agent, all the biological residues adhered in and out of a medical apparatus can be quickly and effectively decomposed and cleaned and aluminum oxide playing a role in protection on the metal surface layer is not damaged.

A method and system for inactivating harmful organisms (e.g., red tide algae and dinoflagellates). The method includes the steps of supplying ambient air to a conditioning unit to generate conditioned air; passing the conditioned air to an ozone generator to generate ozone; mixing the ozone with water, from a water source, that contains the harmful organisms to generate ozonated water; delivering the ozonated water back to the water source to achieve dilution of the harmful organisms; at least partially isolating the water source from external water to prevent quick dilution of the ozonated water; and continually circulating water in the water source through the mixing step. The harmful organisms are inactivated by exposure to the ozone.

The invention discloses a biological oil spilling dispersing agent which is used for emulsifying spilled oil by a surfactant and performing biological repair quickly by using related microbes when oil spilling accidents occur in the process of oil exploitation, oil transportation and oil storage and a preparation method of the biological oil spilling dispersing agent. When the oil spilling accidents occur, the oil spilling dispersing agent is one of common methods for emergent treatment at present, but the conventional chemical oil spilling dispersing agent product has the defects of more consumption of chemical reagents, low degradation speed of the spilled oil and long periods of treatment time and the defect that pollutants can be transferred but cannot be degraded in the process of treating oil spilling leakage. Aiming at the defects, the novel biological oil spilling dispersing agent which contains the surfactant and is used for degrading oil spilling microbial strains quickly is developed. Compared with the conventional oil spilling dispersing agent, the biological oil spilling dispersing agent has the obvious advantages of energy conservation, consumption reduction, environment friendliness, emission reduction, direct reduction in pollution and the like and is quick, simple and convenient when applied to the oil spilling accidents. The microbial inoculum capable of degrading the spilled oil quickly has the advantages of high stability, high spilled oil degradation activity, high growth speed and no secondary pollution to the environment. The biological oil spilling dispersing agent and the preparation method thereof can also be applied to on-site biological repair during the emergent leakage pollution accidents of other various petrochemical products.

The invention discloses a fire-proof and water-proof evacuating and escaping elevator, which overcomes the defect that the traditional elevator always becomes a smoke and fire spreading channel in a fire disaster and the operation of the elevator is affected. The fire-proof and water-proof evacuating and escaping elevator comprises an elevator hoistway, a machine room, a fire-proof hall door and a car and has the technical key point that a fire control water pipe, a hoistway air supply duct and water guidance equipment composed of a water chute and a water duct communicated with the water chute are arranged in the elevator hoisway; a fire control shower nozzle connected with the first control water pipe is fixed on the upper part of the fire-proof hall door or the ceiling of the hall of an elevator waiting hall; the top of the car is provided with an air purification device for conveying fresh air into the car; the projection surfaces of the fire control water pipe, the hoistway air supply duct and the water guidance equipment in vertical direction are respectively positioned outside a car projection surface; and each landing in the elevator hoistway is provided with a temperature detection sensor. The fire-proof and water-proof evacuating and escaping elevator has the advantages of simple structure and reasonable layout, can reliably operate at the early stage of the fire disaster so as to quickly and safely perform the evacuating and rescuing functions, fire-fighting equipment of the elevator conforms to the standard specifications, and the fire-proof and water-proof performance is improved greatly.

The invention relates to a mud sand separation device used for water conservancy projects. The mud sand separation device comprises a mud sand transmission chamber, a stirring mixing chamber, a mud sand separation chamber, a mud filtering box, a sand filtering box, a mud collecting box, a sand collecting box, a first water collecting box, and a second water collecting box. The combination of the above parts is capable of realizing successive mud removing and mud and sand separation, increasing efficiency, and reducing operation cost. High pressure water is adopted, so that high speed stirring of mud sand and water is realized, mud concentration is reduced, and filter plates are protected from being blocked. Mud sand separation of water conservancy projects is realized at high efficiency and low energy consumption.

The invention discloses a multi-liquid proportioned mixing device. The multi-liquid proportioned mixing device comprises a first liquid storage tank, a second liquid storage tank and a liquid storage vessel, wherein the first liquid storage tank is used for storing first liquid, the second liquid storage tank is used for storing second liquid, and the liquid storage vessel is in pipeline connection with the first liquid storage tank and the second liquid storage tank respectively; a first valve and a first flow meter are sequentially connected between the first liquid storage tank and the liquid storage vessel in a pipeline connection manner, and a second valve and a first metering pump are sequentially connected between the second liquid storage tank and the liquid storage vessel in the pipeline connection manner. The multi-liquid proportioned mixing device further comprises an automatic control device which is used for acquiring first flow signals of the first flow meter and controlling the first metering pump to quantitatively output the second liquid according to the first flow signals. According to the multi-liquid proportioned mixing device disclosed by the invention, flow meters and metering pumps are respectively mounted on a plurality of pipelines, and outputs of the metering pumps are controlled proportionally in a manner of acquiring data of the flow meters by the control device, so that the rapid dilution and proportioned mixing of a variety of liquids are realized, and the concentration of the mixed liquid is stable.

The invention provides a scalable multiple-proportion dilution microfluidic chip. The microfluidic chip is composed of a cover sheet and a substrate, the upper layer is the cover sheet provided with asquare wave micro flow channel network structure, the lower layer is the flat substrate, and the upper-layer cover sheet and the lower-layer substrate form a closed micro flow channel network throughbonding; two sample inlets and N sample outlets located in both ends of the micro flow channel are connected with soft guide pipes outside, wherein N is an integer >= 1, and N outlets represent a dilution level of a liquid sample to be diluted; a reagent sample to be diluted and a diluent in a micro-syringe are added into the sample inlets through a micro injection pump under a constant positivepressure, respectively, and the soft guide pipes at the sample outlets are connected with a collection device of a sample after multiple-proportion dilution to form the microfluidic chip; each sampleinlet is provided with one filter tank, and the interior of each filter tank is provided with a row of same rectangular stop blocks with a certain interval; each-level dilution module is composed of amixed flow channel and a connecting flow channel, and lengths of the mixed flow channel and the connecting channel are fixed; and rectangular baffles arranged in a staggered manner are arranged at the corner of the interior of the square wave mixed flow channel in each-level dilution zone.

The present invention relates to a gelatin derivative having an organic compound as a graft chain and a high-molecular weight micelle containing the gelatin derivative. As the organic compound, a low molecular weight compound such as succinic acid, ethylenediamine, etc., or a high-molecular weight compound such as polyethylene glycol, polylactic acid, etc. can be used. The high-molecular weight micelle can be used as a pharmaceutical composition excellent in control of sustained release or targeting property by carrying it on a drug, etc. Also, the gelatin derivative can be an excellent adhesion preventing membrane by crosslinking it.

The invention discloses a device for achieving constant-volume proportional dilution. The device comprises a constant-volume tube, a quantifying loop, a mixing bottle, an air pump and a solenoid valve assembly; liquid to be diluted and diluting liquid are pumped to the constant-volume tube and the quantifying loop separately through a pressure difference generated by switching on or switching off the air pump and the solenoid valve assembly, and the mixing bottle is used for mixing the liquid to be diluted and the diluting liquid. The invention discloses a method for achieving constant-volume proportional dilution. A novel constant-volume tube and quantifying loop combining technology and an air pump and solenoid valve combining technology are introduced, and online rapid and precise dilution of various water sources such as ground surface water, sewage and industrial waste water is achieved.

The mixed aeration type biological treating system features that there are one circular biochemical pond set beside the mixing pond, which has one inside ejector and two overflow grooves in the top including one connected to the mixing pond via an outside circulating pipe; one first stage air floating pond connected to the other overflow groove and to the mixing pond via a sewage reflux pipe; one second stage air floating pond connected to the first stage air floating pond; one blower connected to the circular biochemical pond via ventilating pipeline; and one shallow aeration pipe in the outlet of the ventilating pipeline. The present invention has combined inside-pond circulation and outside-pond circulation, greatly raised impact resistance, and increased chemical-adding coagulating and air floating pond for raised treating capacity.

The invention relates to a method for diluting concentrated sulfuric acid with a mixture of ice and water in the preparation of graphite oxide, which comprises the following steps: firstly take graphite powder and place it in a first reaction vessel, then add concentrated sulfuric acid and stir; add high Potassium manganate and stirring; the first reaction vessel is heated in a water bath at 30 to 40°C; the mixed reactant in the first reaction vessel is added to the second reaction vessel containing a deionized ice-water mixture and stirred; Add hydrogen peroxide dropwise into the second container until no bubbles are generated; filter the insoluble matter in the suspension and wash them several times with dilute hydrochloric acid and deionized water; Dry at room temperature in the box, and obtain graphite oxide after vacuum drying. The method of the invention has the advantages of rapidity, simple and stable process, low requirement on equipment and is suitable for large-scale production.

A device for controlling airflow between a clean room (1) and an adjacent room (2) is described. Channels (10, 6) lead from the rooms (1, 2) to a common junction (8). A ventilation channel (9) is leading from the common junction (8) for feeding or carrying off air. In the channel (10) from the clean room (1) is included a resistor element for the airflow, while the channel (6) from the adjacent room (2) has low hydraulic impedance.

The invention relates to a self-crosslinking macromolecular dust suppressant and a preparation method thereof and belongs to the technical field of environmental pollution improvement and particularly relates to the self-crosslinking macromolecular dust suppressant and the preparation method thereof. The self-crosslinking macromolecular dust suppressant is characterized by being prepared by taking styrene (St) as a hard monomer, ethyl acrylate (EA), 2-ethyl hexyl acrylate (2-EHA) as a soft monomer, introducing acrylic acid (AA) and acrylamide (AM) as a functional monomer, diacetone-acryloamide (DAAM) and adipic dihydrazide (ADH) as a self-crosslinking monomer, taking persulfate as an initiator, alkyl diphenyl ether disulfonate (DSB) as an emulsifier and allyloxyl nonylphenol ether ammonium sulfate (DNS-86) as a reactive emulsifier by virtue of a seed emulsion polymerization method. The self-crosslinking macromolecular dust suppressant provided by the invention has excellent wear resistance, water resistance, resistance to acid and base and corrosion resistance and is an environment-friendly green product.

The invention relates to a preparation technique of a wound dressing, which is characterized by comprising steps as follows: acrylic sulfonate monomers and acrylic amide monomers are used as crosslinking polymerization materials, glycerol is used as a plasticizer, and unsaturated double-bond bifunctional ester monomers are used as a crosslinking agent; ultraviolet polymerization crosslinking is carried out to obtain an aquagel material; and the aquagel is combined with a substrate to obtain the wound dressing. The preparation technique of the wound dressing is reasonable, and has good operational controllability. The invention can implement high tensile resistance of the wound dressing and no adhesion characteristic of the wound; the wound dressing has good water absorptivity, has good characteristics of preventing external contamination and bacteria entry; and the aquagel used by the wound dressing can also be used as a pharmaceutical vector to perform the functions of embedding and carrying drugs.

A method is provided for making inexpensive synthetic inorganic resins that are stable, mix easily with water and may be conveniently diluted to form an easy-to-use paste for commercial applications. The method uses environmentally friendly techniques to provide improved efficiencies in the commercial production of these resins. The resins are produced by the partial reaction of phosphoric acid with sparsely-soluble oxides, or sparsely-soluble oxide minerals, that are added to the phosphoric acid under controlled conditions. In certain specific embodiments, methods are provided for modifying synthetic inorganic resins so as to produce rapid-setting phosphate cements and ceramics having high flexural strength. Unique synthetic inorganic resin formulations are also disclosed. These formulations are phosphate-mineral based, non-volatile, tend to be non-flammable, do not contain any hazardous inorganic or organic compounds, and are chemically stable at relatively high temperatures, yet they are less expensive than most commercially available organic synthetic polymeric resins.

The invention discloses a smoke diluting device which comprises a smoke collecting chamber, an air collecting chamber, a smoke diluting chamber, a first piston and a second piston, wherein the smoke collecting chamber is provided with a smoke inlet valve and a smoke outlet valve; the air collecting chamber is provided with an air inlet valve and an air outlet valve; the smoke diluting chamber is provided with an outlet; the smoke collecting chamber is communicated with the smoke diluting chamber by the smoke outlet valve; the air collecting chamber is communicated with the smoke diluting chamber by the air outlet valve; the first piston is arranged in the smoke collecting chamber and is in fit with the smoke collecting chamber; and the second piston is arranged in the air collecting chamber and is in fit with the air collecting chamber. The smoke diluting device is simple to operate, is low in price, can conveniently and rapidly carry out smoke collection and dilution and is convenient for sampling and detection of a small-range smoke analysis meter; and moreover, the smoke diluting device has no special requirements on smoke components, is influenced a little by oil stain, particles and corrosive gas and is suitable for rapid dilution, sampling and analysis on the smoke components in various high-concentration smoke.

An insect attractant and eradicant composition providing two part insect control. Insects are drawn to a centralized attractant and as such removes their presence, annoyance, and harm from areas surrounding the attractant. The insecticidal properties associated with the attractant and eradicant composition then immobilizes and kills the insects for terminal removal from the area. The composition is made from essential oils and common household components for a non-toxic formulation to humans and animals, but retaining high insecticide effectiveness. The design of the composition and the dispenser provide for continuous and effective attractant properties through extreme deployment conditions and a dispenser that is capable of small to large numbers of insects. The composition was developed for commercial agricultural use, and is well suited for residential, agriculture, and other commercial and non-commercial applications as it is a safe and benign composition of non-toxic essential oils and other common household components.

The invention relates to a cathartic device used in rectum part, which comprises: a pressurize device, an one-way valve, a gas inlet tube, a liquid storage pot, a control valve, a liquid outlet tube and a liquid inlet interface; and it has a rod ejector with at least two liquid ejectors. The invention can be used in hospital or common family, to quickly soften fecal blocks; and it gives a downward rotational pushing force; and it has washing function, to clean the rectum, to recover activity of rectum. And it can be used as cleaner at other parts.

The invention provides a set of three-sludge recycling treatment technology which comprises the following steps: adding three sludge and a flocculating agent into a centrifuge for centrifugation; conveying the obtained dry sludge into a thick sludge pump, and conveying the obtained sewage into a sewage treatment plant for recycling treatment; injecting a water flow into the thick sludge pump so as to convert the dry sludge into three sludge with the water content of 93-94%; conveying the three sludge with the water content of 93-94% into a sludge mixing tank, and then conveying the three sludge into a sludge circulating pump from the sludge mixing tank; outputting the uniformly stirred three sludge by the sludge circulating pump; conveying the uniformly stirred three sludge and water vapor together into a three-sludge dispersion device so as to tear and disperse the uniformly stirred three sludge into tiny droplets; and conveying the tiny droplets as a large vapor blowing medium into a joint coking device to finish a coking process. The technology provided by the invention has the following beneficial effects: tiny droplets are obtained through centrifugation, stirring and dispersion, and the droplets can serve as a large vapor blowing medium and enter the joint coking device for recycling; and through the design, all three sludge can be recycled at low cost, and the aims of energy conservation and emission reduction are achieved.

The invention discloses an automatic agitator, which comprises a base, the base and a screw are perpendicularly assembled, a first motor is connected to the screw through a coupling, a slider is mounted on the screw, a second motor is fixed on the slider, a flange is connected to the second motor, an agitating shaft is fixed on the flange, and the agitating shaft is connected to agitating blades.A lower limiter and an upper limiter are fixed on the screw. The automatic agitator has the advantages that the step motor and the screw joint act to move the slider up and down; moreover, motor agitation is fast and uniform; the blades used can efficiently and quickly dilute liquid to be uniform; furthermore, a vortex can be formed in a barrel, so that the liquid in the barrel can be uniformly mixed; and the automatic agitator has a simple structure, and is safe, quick and efficient to use.

The invention relates to the technical field of adhesives, and discloses a graphite-based high-strength heat-conducting epoxy resin adhesive and a preparation method thereof. The adhesive comprises the following components in parts by weight: bisphenol A type epoxy resin, calcium carbonate, modified graphite, composite glass fibers, 1, 4-butanediol diglycidyl ether, a curing agent polydiphenyl substituted cetane dicarboxylic anhydride, a curing accelerator pyridine and absolute ethyl alcohol. The preparation method comprises the following steps: performing ultrasonic oscillation dispersion onmodified graphite to obtain a graphite suspension; adding bisphenol A epoxy resin, calcium carbonate, composite glass fibers and 1, 4-butanediol diglycidyl ether into the graphite suspension, and uniformly mixing to obtain a premix; and adding polydiphenyl substituted hexadecane dicarboxylic anhydride and pyridine into the premix, pouring into a metal mold, and standing while keeping the temperature, thereby obtaining the graphite-based high-strength heat-conducting epoxy resin adhesive. The adhesive prepared by the method has high mechanical strength and excellent heat-conducting property, and the application range of the epoxy resin adhesive is expanded.

The invention provides a ventilation method for high gas extra-long tunnel construction. The ventilation method for the high gas extra-long tunnel construction comprises the steps that the ventilationmethod is divided into two stages for ventilation according to a construction progress; a first stage, specifically, before a ventilating shaft is completed, a forced ventilation mode is adopted in an outlet work area and a tunnel middle inclined shaft work area; a second stage, specifically, after the ventilating shaft is completed, the ventilation mode of inlet and outlet work areas of two endsof a tunnel is not changed, and a jet fan is additionally added in a hole to reinforce return air according to the construction progress; and a creative ventilation mode of self-shaft suction type ventilation and self-inclined shaft exhaust air is adopted in the tunnel middle inclined shaft work area, and the jet fan is additionally added in the hole according to the construction progress of thework surface of the two ends of the inclined shaft work area, so that polluted air is discharged from a self-inclined shaft through the jet fan. Two types of the ventilation modes are matched reasonably through different stages and different work areas, the ventilation effect is improved, and the construction cost can be greatly reduced. And meanwhile, the personal safety of constructors is ensured by arranging a wind power locking and tile power locking system.

The invention relates to a biological wastewater treatment device implementing a stirring operation by using anaerobic gas, which adopts a circulating-closed channel structure, and comprises a water inlet channel, a plug-flow device, an aeration mixing system, an anaerobic gas pressurization device, a mud-water separation device and an anaerobic gas emission device. The biological wastewater treatment device disclosed by the invention is mainly characterized in that a mud-water mixture in the biological wastewater treatment device is stirred by using the reflux of anaerobic gas generated by the metabolism of microbes in the biological wastewater treatment device, so that the settlement of activated sludge is prevented and an anaerobic environment is created, thereby creating a good external environment for biochemical reactions. Because the biological wastewater treatment device adopts a closed channel structure, an anaerobic gas collecting cavity can be formed on a liquid surface, thereby facilitating the collection of anaerobic gas; and the plug-flow device is arranged in the channel, so that the mud-water mixture can be fully circulated, and coming water can be diluted, thereby reducing the impact of loads of the coming water on a microbe system.

The invention discloses a culture sewage processing system based on EGSB anaerobic reactor. The processing system comprises a screen tank, a fine grain screening device, a PH adjusting tank, an oil insulation adjusting tank, a water volume adjusting tank, an EGSB anaerobic reactor, a tower-type biological filter, an oxidation pond and a subsurface flow constructed wetland which are in series connection in order. The EGSB anaerobic reactor comprises a water distributing device, a reaction region, a three-phase separator and a water collection region which are arranged from bottom to top in order, and also comprises a reaction region partition device. The reaction region partition device comprises an adjustable lifter pipe and a perforated pipe communicated with the lifter pipe vertically. The reaction is divided into a first sludge region above the perforated pipe and a second sludge region with the position of the perforated pipe as a boundary. The reaction region partition device also comprises a lifter driving device driving the lifter pipe to go up and down in the reaction region. The lifter pipe is connected with a sewage backflow circulating pipe. A circulating pump is arranged on the sewage backflow circulating pipe. Scale marks indicating the going-up-and-down distance of the adjustable lifter pipe are arranged on the adjustable lifter tube.

The invention discloses an explosion-proof electric control hydraulic actuating mechanism and a working method thereof. A mounting cavity is formed in a protection box, a first sealing gasket is fixedly connected to the inner wall of the mounting cavity, a mounting base is fixedly connected to the bottom of the mounting cavity, a first mounting hole is formed in the middle of the bottom surface ofthe mounting cavity, a hydraulic pipe is fixedly mounted in the first mounting hole, a first sealing groove is formed in the bottom of the mounting base, the first sealing groove is communicated withthe top end of the hydraulic pipe, four first through holes are formed in the top of the first sealing groove, every two of the four first through holes are symmetrically formed about the transversecenter line of the mounting base, and after the above structure is adopted, the electric control hydraulic actuating mechanism can prevent gas leakage and explosion in time through a first hydraulic mechanism and a second hydraulic mechanism, warn related personnel through an arranged alarm, release carbon dioxide gas in time, reduce the gas concentration and avoid dangers.

The invention relates to a condensed multi-enzyme medical cleaning agent. The cleaning agent contains surfactants, a detergent auxiliary agent, a solubilizing agent, an enzymic preparation, a foam inhibitor and a preservative, wherein the surfactants are a non-ion surfactant and an anion surfactant. The cleaning agent comprises the following formula components in percentage by weight: 5 to 10 percent of alkoxyl fatty alcohol, 3 to 5 percent of alkyl polylucoside, 5 to 10 percent of alkanol polyether, 5 to 10 percent of sodium xylene sulfonate, 0.5 to 1.5 percent of sodium sulfate, 0.5 to 1 percent of calcium chloride, 2 to 4 percent of disodium ethylene diaminetetraacetate, 5 to 10 percent of hydrogenated castor oil, 6 to 12 percent of dipropylene glycol monomethyl ether, 5 to 10 percent of glycerol, 2 to 6 percent of proteinase, 1 to 5 percent of amylase, 1 to 5 percent of lipase, 0.5 to 1 percent of cellulase, 0.1 to 0.5 percent of methylparaben and propyl hydroxybenzoate preservative, 0.1 percent of essence, 0.1 percent of pigment and the balance of deionized water. Through the cleaning agent, all the biological residues adhered in and out of a medical apparatus can be quickly and effectively decomposed and cleaned and aluminum oxide playing a role in protection on the metal surface layer is not damaged.

The invention belongs to the technical field of processing of meal replacement powder, and particularly relates to a production method of wholegrain meal replacement powder. The method comprises the following steps: (1) matching and taking raw materials, wherein according to weights of black rice, soybeans, oats, sweet potatoes, hawthorns and inulin, the components are weighed; (2) conducting cleaning and stir-frying, wherein the raw materials in the step (1) are cleaned and dried, the raw materials are stir-fried individually, and stir-frying temperature of the stir-frying process is 150-180DEG C; (3) conducting drying and grinding, wherein raw materials in the step (2) are subjected to classified drying, ground into 100-200 meshes by a cooled ultra-fine grinder at controlled temperatureof 25 DEG C separately, and are subjected to classified storage; and (4) conducting mixing and packaging, wherein according to a ratio, obtained powder is produced, and is placed into a vacuum stirrer for even mixing, a mixed raw material is placed in package balls (1) for packaging, and then the package balls are packed into a packaging tank. The package balls can effectively prevent the phenomena that after meal replacement powder absorbs moisture, nutrients lose, the taste of the meal replacement powder is reduced, and the meal replacement powder is liable to be stuck to an outer package to cause deformation, and even goes bad.

The invention discloses a silicon carbide epitaxial growth device. The epitaxial growth device comprises a gas supply system, the gas supply system comprises a front-end module and a rear-end module, the front-end module is used for accessing reaction gas, the output of the front-end module is connected with the rear-end module, and a gas path of the rear-end module is provided with a branch flow path matched and corresponding to at least one reaction gas type, the number of flow paths of each branch flow path is equal to the number of gas inlet cavities n of the multi-cavity spray head device, each gas path branch is provided with a pressure controller and (n-1) flow controllers, and the rear end module is used for adjusting reaction gas, carrier gas or protective gas before the multi-cavity spray head device is introduced. The flow of the gas path branches in the gas supply system is set and determined by the n-1 MFCs, and the gas flow of the path where the PC is mounted is equal to the difference between the total gas inlet flow of the front parts of the branches and the total flow of the branches where the MFCs are mounted, so that the problem that the total flow of the inlet does not accord with the total flow of the outlet is solved.