46results about How to "Does not affect quality" patented technology

The invention discloses a mixed randomization privacy protection method of social network data dissemination. The mixed randomization privacy protection method includes the steps that top points V of an undirected graph G(V,E) for expressing social network data are divided into a set Vk and a set Vr according to degree numbers with k-anonymity as a condition, wherein the set Vk comprises the points with the degree numbers meeting the k-anonymity condition, and the set Vr comprises the points with the degree numbers not meeting the k-anonymity condition; the points in the set Vk are not processed; randomization protection processing is carried out on the points in the set Vr. According to the mixed randomization privacy protection method, an existing k-anonymity method and an existing randomization method are combined, the number of users of the social network is not changed, influences on the nature and the quality of data provided for third parties are small, the processing process is simple, and the processing speed is high; after processing is carried out, the social network data of each person can be in one of the two following protection states: the degree natures are not changed, and the social network data of the person are located in other at least k persons same as the person in degree nature, or the degree natures are changed; relocation attacks with structure background knowledge can be prevented through the protection, and the demands of the users of the social network for the privacy safety are met.

The invention discloses a salmonella phage LPSE34. The preservation number of the salmonella phage LPSE34 is CCTCC NO 2018121. The phage is a broad-spectrum salmonella phage and can crack drug-tolerant salmonellas, it is identified that the phage belongs to myoviridae, and the phage is named as LPSE34. The phage LPSE34 is stable in titer at the pH of 4-12 and the temperature of 30-60 DEG C. The invention further discloses application of the salmonella phage in food, especially in chicken and ham systems; and in addition, the invention further discloses a compound edible coating film formed bytaking the phage as an antibacterial substance to be combined with sodium alginate, and compared with antibiotics and chemical preservatives, the phage cannot affect the texture and flavor of food andhas the characteristics of high specificity, no residue and safety. The salmonella phage LPSE34 can serve as a bacteriocidal substance/the antibacterial substance to control pollution of food-borne pathogens to the food and is a very promising biological agent for guaranteeing the food safety.

The invention provides a soil cadmium passivant which comprises the following raw materials in parts by weight: 30-85% of red mud, 10-70% of rape stalk, less than or equal to 10% of lime, less than or equal to 5% of phosphatic fertilizer, and less than or equal to 1% of zinc, wherein when pH of soil is greater than 6, the lime is equal to 0%. The soil cadmium passivant aims at reducing effective cadmium in the soil; the main raw materials belong to recycled wastes; the consumption of the auxiliary materials is less; the total cost is very low; the pretreatment of the raw materials is very simple, convenient and easy; special treatment processes such as chemical method modification are not required; the passivant can be obtained only by simple air drying, crushing, screening and mixing; the technology is simple; an application method of a passivant product is relatively simple; the passivation on soil cadmium is higher; the passivant has specificity and is wide in application scope; secondary pollution cannot be generated on the soil; the quality and the yield of crops cannot be influenced; the content of effective cadmium in the soil can be reduced effectively; and the passivant is suitable for various moderately and slightly polluted soil types.

The present invention relates to a nasal spray containing sodium pyruvate and a preparation method thereof, belonging to the field of medical technology, being characterized in that: the nasal spray containing sodium pyruvate comprises the following components: sodium pyruvate, pyruvic acid, an isoosmotic adjusting agent, a preservative and water. Because the sodium pyruvate is capable of alleviating nasal obstruction and inflammation caused by rhinitis, a medical fluid provided in the invention can be made into a nasal spray medical fluid which is capable of entering nasal cavities by adopting a portable spraying device. The nasal spray medical fluid is particularly suitable for cleaning and removing harmful pollutants in nasal passages, paranasal sinuses and mucosal cilia and is capable of being used in nursing after a nasal cavity operation, relieving rhinostegnosis and reducing respiratory tract irritation and risks of infection. By adding the pyruvic acid to form a buffer solution, tingling caused by using the flushing fluid to wash the cavities can be reduced, and inflammation is alleviated. Allergic symptoms can be prevented or gradually alleviated for the people of special professional who often use the product provided in the invention to wash and care nasal cavities.

The invention discloses an aluminum alloy welding process and belongs to the technical field of metal welding. The aluminum alloy welding process comprises the following steps: (1) a welding area of the surface of an aluminum alloy plate is put into a cleaning fluid for ultrasonic cleaning and then dried; (2) the welding area of the to-be-welded aluminum alloy plate is heated to 150-200 DEG C; (3) the welding area of the to-be-welded aluminum alloy plate is heated to 750-830 DEG C, a degasifier is sprayed to the welding area of the aluminum alloy plate, and the aluminum alloy plate is welded with a special aluminum alloy welding wire; (4) the welded part of the aluminum alloy plate is subjected to solid solution at the temperature of 300-450 DEG C, and the aluminum alloy plate is subjected to degasification treatment through ultrasonic waves; (5) the welded part of the aluminum alloy plate after solid solution treatment is transferred to cold water and cooled to the room temperature; (6) clearing and removal of welding powder or slag are performed. With the adoption of the aluminum alloy welding process, the pore problem can be effectively solved, and incomplete fusion, incomplete penetration and cracking phenomena are unlikely to occur.

The invention discloses an adapting card for peripheral component interface (PCI) Express X16 to compact peripheral component interconnect (CPCI) Express X16. The adapting card comprises an impedance control circuit board, an adapting circuit board, a PCI Express X16 interface, a CPCI Express signal socket, a CPCI Express power socket, a double-row hole socket, a bent pin double-row plug, a connecting block and a baffle plate, wherein the CPCI Express signal socket and the adapting circuit board are connected with the upper part of the impedance control circuit board; a PCI Express X16 interface is formed in the lower part of the impedance control circuit board; the bent pin double-row plug is arranged on the left middle part of the impedance control circuit board; and the CPCI Express power socket and the bent pin double-row plug are arranged on the adapting circuit board. The quality and the efficiency of a signal are not affected, the application range of the current PCI Express X16 slot is expanded, the difficulty and the cost for the development of a CPCI Express X16 interface card are greatly reduced, and the adapting card is simple in structure and convenient to use.

The invention relates to a color and impurity removal technique, particularly a method for removing color and impurities from concentrated phospholipid. The method comprises the following steps: putting concentrated phospholipid in a closed vessel, and adding filter aid and decolorant into the vessel containing concentrated phospholipid; stirring at 50-130 DEG C under the negative pressure of 0.09-0.05 MPa in a vacuum state for 40 minutes; and after finishing stirring, carrying out pressure filtration. The filter aid is one or more of puffed soybean meal, perlite, kieselguhr and silica gel, and accounts for 1-15% of the concentrated phospholipid; and the decolorant is activated carbon, and accounts for 1-15% of the concentrated phospholipid. The invention adopts a physical method to implement color and impurity removal on the concentrated phospholipid at specific temperature in a vacuum environment, has the advantage of low equipment investment, is safe and convenient to operate in production, and can not influence the quality and properties of the concentrated phospholipid.

The invention relates to an oil adjuvant of inactivated vaccine. The oil adjuvant consists of white oil for injection and mannitol olein which are mixed in volume proportion of 90:10 to 100:8. The oil adjuvant of the inactivated vaccine has the advantages that: 1) the oil adjuvant of the inactivated vaccine is convenient for use, the process for manufacturing the inactivated vaccine is simplified, the inactivated vaccine is manufactured by one step in stead of three steps at present, and the cost of the vaccine is reduced; 2) the oil adjuvant of the inactivated vaccine is almost nontoxic, the content of aromatic hydrocarbon of the white oil used in the invention is low and is less than 50ppm, after the vaccine is injected into an animal body, the vaccine causes very small erythema and does not influence the quality and the appearance of meat; and 3) the oil adjuvant of the inactivated vaccine has low viscosity coefficient, has low resistance for pushing a pin when being used for animal epidemic prevention injection and is convenient for injecting.

The invention discloses a nano graphite modified powdery demolding agent for valve casting and relates to the technical field of demolding agent production. The nano graphite modified powdery demolding agent is prepared by the following raw materials in part by mass: 60-70 parts of polyethylene wax powder, 15-18 parts of nano graphite powder, 12-15 parts of calcined kaolin, 10-13 parts of cork powder, 8-10 parts of titanium dioxide, 6-9 parts of beef tallow, 5-7 parts of silica micropowder, 4-6 parts of carboxymethyl chitosan, 3-4 parts of concentrated hydrochloric acid, 2-3 parts of dodecanedioic acid, 40-45 parts of normal heptane, 25-30 parts of methylbenzene and 60-70 parts of water. The nano graphite improved powdery demolding agent is good in demolding effect, demolding can be implemented after a valve is fully cooled and shaped, size accuracy and surface quality of the valve are not affected, and the nano graphite improved powdery demolding agent is long in service life.

The invention discloses a nano bentonite improved pasty demolding agent for valve casting and relates to the technical field of demolding agent production. The nano bentonite improved pasty demolding agent is prepared by the following raw materials in part by mass: 70-80 parts of methyl silicone oil, 12-15 parts of nano bentonite, 15-18 parts of zeolite powder, 10-14 parts of calcium carboante, 8-11 parts of lard, 6-9 parts of mica powder, 3-5 parts of abietic acid, 2-4 parts of laurel wax, 1-2 parts of alkyl naphthalene sulfonate, 2-4 parts of concentrated nitric acid, 10-12 parts of methyl ethyl ketone, 20-30 parts of alcohol and 50-60 parts of water. The nano bentonite improved pasty demolding agent is good in demolding effect, demolding can be implemented after a valve is fully cooled and shaped, size accuracy and surface quality of the valve are not affected, and the nano bentonite improved pasty demolding agent is long in service life.

The invention discloses a nano titanium dioxide improved pasty demolding agent for valve casting and relates to the technical field of demolding agent production. The nano titanium dioxide improved pasty demolding agent is prepared by, by mass, 70-80 parts of methyl silicone oil, 15-20 parts of nano titanium dioxide, 12-15 parts of talcum powder, 10-13 parts of diatomite, 8-10 parts of gas-phase silica, 6-9 parts of abietic acid, 5-8 parts of vaseline, 4-6 parts of alkyl naphthalene sulfonate, 3-5 parts of lard, 2-4 parts of concentrated nitric acid, 10-12 parts of methyl ethyl ketone, 20-30 parts of alcohol and 50-60 parts of water. The nano titanium dioxide improved pasty demolding agent is good in demolding effect, demolding can be realized after a valve is fulled cooled and shaped without having influence on size accuracy and surface quality of the valve, and the nano titanium dioxide improved pasty demolding agent is long in service life.

The invention discloses a protective method for the hearth of a rotary hearth furnace used for the direct reduction of the vanadium titano-magnetite. A common refractory material is laid on the lower part of the hearth of the rotary hearth furnace; titanium slag obtained from a directly reduced metallic pellet which is subjected the electric furnace fusion and separation is crushed to 2 to 10mm and is laid on the refractory material on the surface of the hearth of the rotary hearth furnace. A soft hearth working surface is formed by the titanium slag between the refractory material on the surface of the hearth of the rotary hearth furnace and the reduced furnace charge; and then the preset thickness of the soft hearth working surface is reduced due to the loss, and the crushed titanium slag can be loaded into the hearth of the rotary hearth furnace. As the titanium slag has a higher fusion point, the vanadium titano-magnetite can be prevented from being atomized and sticking to the hearth in the 1,300 to 1,400 DEG C direct reduction process during use. As the hearth is a loose and soft hearth, the vanadium titano-magnetite does not stick to the hearth even with expansion. Therefore, the method has the advantages of protecting the hearth and a screw discharger, protecting the titanium slag from being polluted by the refractory material, bringing about the cycle use of the titanium slag, reducing the furnace maintenance cost, and having obvious economic and social benefits.

The invention discloses a rigid wall connection part of a scaffold. The rigid wall connection part comprises a scaffold straight barrel, wherein a fixed plate is arranged at one end of the scaffold straight barrel; the scaffold straight barrel is vertical to the fixed plate; a nut is arranged on the inner side of the fixed plate; the nut and an inner hole of the scaffold straight barrel are concentric; and the nut is internally provided with a thread connection rod which extends to the outer side of the fixed plate. With the adoption of the manner, according to the rigid wall connection part of the scaffold, a hole is drilled in a side face of a concrete beam, and one end of the thread connection rod is fixed in the hole by using glue; the scaffold straight barrel is rotated, and the fixed plate is stuck and fixed onto the side face of the concrete beam by virtue of the matching of the nut and the thread connection rod; the scaffold straight barrel extends outwards in a manner of being vertical to the fixed plate, so that the scaffold is convenient to erect, the structure strength is high and the safety is guaranteed; and the construction cost is reduced, and the construction and quality of a wall surface are not influenced.

The invention provides a recovery and reutilization method of cyclohexylamine in a CBS production technology. The method comprises the following steps: A)synthesis of a rubber promoter CBS; B)adding a CBS crude product obtained in the step A) in a centrifuge spin dryer for performing solid-liquid separation; C)distilling a mother liquor obtained in the step B) to obtain a cyclohexylamine aqueous solution with a certain content; D)determining the proportion of the recovered cyclohexylamine so as to determinate the cyclohexylamine content; and E)adding the cyclohexylamine aqueous solution with the certain content in proportion in an oxidation kettle for next reaction. The method has the beneficial effect that cyclohexylamine in the mother liquor can be recovered through a distillation mode, the recovered cyclohexylamine is placed in the oxidation kettle for continuous reaction, and the product purity and quality can not be influenced. The method is capable of increasing the raw material utilization rate, reducing the product raw material cost and increasing the enterprise profit margin.

The invention discloses lotus seed extra-thin noodles with health care efficacy and a manufacturing method thereof. The manufacturing method comprises the following steps: using whole lotus seed meal through ultrahigh pressure treatment, water, flour, salt, tapioca flour and edible oil as raw materials, kneading dough, mixing the edible oil with the dough, mixing the flour with the dough, cutting the dough into small dough, stretching the dough to form noodles, performing solar energy-heat pump combined drying, and packaging the noodles to obtain the lotus seed extra-thin noodles with the health care efficacy. With application of the manufacturing method disclosed by the invention, as the lotus seed whole flour through ultrahigh pressure treatment is added to the flour, the manufactured extra-thin noodles are unique in flavor, and further have the effects of tranquilizing mind by nourishing the heart, tonifying the kidney and nourishing spleens; meanwhile, the lotus seeds are subjected to the ultrahigh pressure treatment, and the content of resistant starch therein can be greatly increased, so as to achieve certain effects of regulating intestinal microecological balance and improving the gastrointestinal function; on the other hand, the solar energy-heat pump combined drying technology is used to greatly shorten sun-curing time and avoid the phenomena that in the conventional extra-thin noodles sun-curing process, the extra-thin noodles are yellow and degraded in quality due to environment pollution and weather effect, so that the lotus seed extra-thin noodles are more sanitary and safer.

The invention provides a preparing method of a plastic packing film capable of preventing stewed beef and mutton from becoming bad and relates to the technical field of food packaging. The preparing method is finished by the following steps: step 1, selecting and preparing materials; step 2, carrying out dissolving and preparing rubber; and step 3, carrying out coating and making the film. The preparing method has the beneficial effects that the shelf life of the stewed beef and mutton is prolonged, and a preservative does not need to be added into stewed beef and mutton products, so that the physical health of consumers can not be affected, and taste and quality can not be affected either.

The invention relates to a composite moisturizing and curing film with effects of adhering prevention and easy stripping. The composite moisturizing and curing film consists of an outer plastic thin film layer, a water absorbing mixing layer and a composite material layer, wherein the water absorbing mixing layer is arranged at the inner side of the outer plastic thin film layer, and is made of water absorbing material and an adhesive; the composite material layer is arranged at the inner side of the water absorbing mixing layer, and is formed by hotly pressing a thin film and a nonwoven cloth. The composite moisturizing and care film has the advantages that the adhesion is prevented, the stripping is easy, the moisturizing and curing effects are good, the strength is high, and the construction speed is high.

The invention discloses a production technology for promoting the acid resistance of double caramel color. During a second pressurized reaction in the reaction process of double caramel color, a halogen-free solid super acid taking a metal oxide or SO4<2-> as an accelerant is added as a catalyst; after the reaction of double caramel color is finished, materials are cooled to 70 DEG C, polymerization inhibitors are added in the stirring process, and the polymerization inhibitors are ferric trichloride and copper chloride. According to the production technology, the acid resistance of double caramel color can be improved effectively by using the specific solid super acid and the specific polymerization inhibitors, the production technology is effectively applicable to higher acid requirement, and the quality and preparation of beverage cannot be influenced.

The invention provides an outer sealant for insulating glass, which comprises the following components in parts by mass: 30-50 parts of modified butyl rubber, 20-25 parts of silicone glue, 35-45 parts of polyisobutylene, and 10 parts of polyvinyl alcohol ‑20 parts, 15‑25 parts of borax, 2‑12 parts of adhesive, 1‑4 parts of plasticizer, 2‑3 parts of colorant. The outer channel sealant for insulating glass of the present invention has extremely low water vapor transmission rate, which can prevent the dew point phenomenon of insulating glass, and the present invention has higher anti-ultraviolet ability, better adhesion and elastic recovery rate, and can improve overall The performance of insulating glass has great practical value.

The invention discloses high-early-activity phosphorus slag powder and a preparation method thereof, and belongs to the technical field of inorganic cementing materials. The preparation method comprises the following steps: mixing phosphate ore, silica, coke and a glass body structure regulator to form a mixture, heating the mixture to 800-900 DEG C, keeping the temperature for 5-10 minutes, then continuously heating to 1300-1400 DEG C for co-melting, and carrying out water quenching treatment on molten slag after co-melting. The prepared phosphorus slag powder has the advantage of high early activity, the preparation method is simple, the energy consumption in the technological process is low, and the economic benefit of preparation is improved.

A method for preservation of broken-down wall conidial powder of ganoderma lucidum comprises a step (1) of evenly mixing 5-10 weight parts of glucose oxidase powder and 2-5 weight parts of grape seed procyanidin powder; a step (2) of adding the mixed powder into 1000000 weight parts of to-be-broken-down wall ganoderma lucidum conidial powder and performing uniform mixing, and then causing the mixture to undergo crushing broken-down wall treatment; and a step (3) of performing vacuum packaging on the product obtained in the step (2). Since a trace amount of glucose oxidase and grape seed procyanidin are added into the broken-down wall conidial powder of ganoderma lucidum and vacuum packaging is performed, it can be guaranteed that the broken-down wall conidial powder of ganoderma lucidum maintains activity, rancidification does not occur easily, and the guarantee period of the broken-down wall conidial powder of ganoderma lucidum is effectively extended. The method has the advantages that steps are simple, trace-amount adding is performed, and a preservation effect is good.

The invention discloses dendrobium nobile dark tea and a preparation method thereof. The dendrobium nobile dark tea comprises the following components in parts by weight: 30-45 parts of coarse dark tea, 10-15 parts of dendrobium officinale, 6-10 parts of codonopsis pilosula and 10-15 parts of black tartary buckwheat, and is prepared by the following steps: performing pile fermentation, adding lucid ganoderma bacteria, and performing secondary fermentation. According to the preparation method disclosed by the invention, the dendrobium officinale and the dark tea are organically combined, and the codonopsis pilosula and the black tartary buckwheat are reasonably matched, so that the formula has the effects of tonifying qi, nourishing yin, strengthening the spleen, nourishing the stomach andeffectively enhancing the immunity of organisms. The preparation method comprises the following steps: firstly, mixing raw material components of the dark tea, dendrobium officinale, codonopsis pilosula and black tartary buckwheat for primary pile fermentation, and then adding the lucid ganoderma bacteria for secondary microbial fermentation. Results show that the dendrobium nobile dark tea prepared by two times of fermentation shows strong lipid-lowering, weight-losing and blood sugar-lowering effects, and can effectively reverse abnormal glucose tolerance of patients at the early stage of diabetes mellitus.

The invention relates to a refining method of propylene oxide, and mainly solves the problem of low yield of propylene oxide in the prior art. The refining method comprises the following steps: (a) introducing a reaction product from an epoxidation reactor into a propylene separation tower, obtaining a first material flow from the tower top, and obtaining a second material flow from the tower bottom; (b) introducing the first material flow into a propylene stripping tower, obtaining a third material flow from the tower top, and obtaining a fourth material flow from the tower bottom; (c) introducing the third material flow into a propylene oxide absorption tower, contacting the third material flow with an absorber in a countercurrent contact mode, obtaining a fifth material flow from the tower top, obtaining a sixth material flow from the tower bottom, and returning the sixth material flow to the first separation tower; and (d) introducing the fourth material flow into a propylene oxide refining tower, fully contacting the fourth material flow with an adsorber filled in the propylene oxide refining tower, and obtaining the product namely propylene oxide from the tower top. The provided refining method well solves the abovementioned problem and can be used to refine propylene oxide in industrial production.

The invention discloses a preparation method of a sildenafil intermediate. The method comprises the steps of by taking 2-amino-5-sulfonic benzoic acid as an initial raw material, firstly carrying out BOC protection on amino, then chloridizing with thionyl chloride, reacting with N-methyl piperazine, and removing BOC in an acidic environment so as to obtain 2-amino-5-(4-methyl piperazine-1-sulfonyl)-benzoic acid; and then diazotizing and brominating, and etherifying by using ethyl alcohol to obtain a target product. The 2-amino-5-(4-methylpiperazine-1-yl sulfonyl)-benzoic acid is subjected to a diazotization reaction, amino is converted into bromine, then ethyl alcohol is used for etherification, bromoethane and dimethyl sulfate which are high in toxicity are prevented from being used, green and environment-friendly effects are achieved, and large-scale production is facilitated.

The invention provides a network audio and video transmission and display method and a network audio and video transmission and display device. The network audio and video transmission and display method includes acquiring signal sources from an input end, synchronously encrypting and coding the signal sources to obtain audio and video information on desktops of computers and raw information of the desktops, decrypting and decoding the synchronously encrypted and coded audio and video information of the desktops and storing the decrypted and decoded audio and video information of the desktops in caches; performing audio and video restoration on the decrypted and decoded audio and video information in the caches according to the raw information of the desktops and storing the restored audio and video information in the caches; converting the restored audio and video information in the caches into digital audio and video information; outputting the digital audio and video information to a display terminal. The network audio and video transmission and display method and the network audio and video transmission and display device have the advantages of wide signal source range, zero display cards for display terminal equipment, unconstrained transmission distance, high quality of outputted images, low cost and simplicity in use.

The invention discloses a high-purity quartziferous silicon core for improving energy efficiency of a polycrystalline silicon reduction furnace, the silicon core is arranged to be of a hollow structure and is made of a high-purity quartziferous material, the high-purity quartziferous silicon core is a hollow silicon core, and the high-purity quartziferous silicon core replaces an original solid silicon core in the polycrystalline silicon reduction furnace. The high-purity quartziferous silicon core is prepared by taking high-purity crystal quartz with the purity of 99.99% or above as a raw material and using a colloid treatment method; the defects that a traditional solid silicon core is small in diameter and limited in deposition area can be effectively overcome, the chemical vapor deposition speed of polycrystalline silicon is greatly increased, and the energy efficiency of a polycrystalline silicon reduction furnace is improved.

The invention discloses a smoke tail gas backflash energy-saving device and a method, which belong to the filed of energy-saving devices, wherein a fan is arranged on a main flue outlet of a baking furnace, smoke tail gas in a main flue is lead into a burner by the fan, an outlet of the burner is connected with a first pipeline inlet, a first pipeline outlet is connected with a heat energy recover main pipeline inlet, a heat energy recover main pipeline outlet is connected with a smoke exhaust pipeline inlet, the side wall of the heat energy recover main pipeline is provided with a plurality of interfaces, and the interfaces are connected with a flue high temperature section of the baking furnace. The smoke tail gas backflash energy-saving device can reduce above 30 percent of gas dosage in the baking furnace, and smoke tail gas which is discharged into the atmosphere is superior to the national standard.

The present invention discloses an automatic production line and a production technology for sweet potato nutritional meal powder. According to a conveying direction of materials, the automatic production line successively comprises a washing device used for washing fresh sweet potatoes and not destroying epidermis of the sweet potatoes, a slicing device used for slicing the sweet potatoes, a cooking device used for cooking sweet potato slices to be well-done, a first cooling device used for cooling the cooked sweet potato slices, a drying device used for drying the fresh sweet potato slices, a second cooling device used for cooling the dried sweet potato slices, a crushing device used for crushing the cooled sweet potato slices and a dry powder body mixing device used for mixing sweet potato powder and nutritional powder. The automatic production line can automatically combine the produced cooked sweet potato powder and the other nutritional powder to form the nutritional meal powder and is high in degree of automation.

The present invention provides a fertilizer proportioning method for effectively reducing the content of heavy metal cadmium in tobacco leaves, which includes transplanting tobacco seedlings in tobacco fields slightly polluted with cadmium according to their natural growth period, applying special base fertilizer for tobacco, and topping tobacco leaves with low quality. Removal of foot leaves, follow-up management of diseases and insect pests, and field moisture management; after applying tobacco-specific base fertilizer, dissolve potassium carbonate and dipotassium hydrogen phosphate in water for two topdressings, and apply potassium carbonate 5g/plant and phosphoric acid for the first topdressing Dipotassium hydrogen 2.5g/plant, and the second topdressing application of potassium carbonate 7.5g/plant and dipotassium hydrogen phosphate 3.5g/plant. The purpose of the invention is to reduce the cadmium content in the tobacco leaves and weaken the harm of smoking to the human body. The invention adopts common fertilizers, has low cost, can significantly reduce the cadmium content of tobacco leaves in acidic soil only by fertilizing, has a wide range of applications, does not cause secondary pollution to soil, and does not affect the quality and yield of tobacco leaves.

The invention belongs to an industrial chemical field, more concretely a reaction vessel vacuum system device field used in the industrial chemical field. A reaction vessel vacuum system comprises a reaction vessel and an air machine, wherein a buffer tank is arranged between the reaction vessel and the air machine, and the buffer tank is a sealed hollow tank. The reaction vessel vacuum system employing a technology scheme of the invention, can prevent water in a pump connected with the air machine from going into the reaction vessel through the air machine, in order to ensure reaction quality reaction safety of internal substances in the reaction vessel, and can prevent the substances or impurities in the reaction vessel from going into the air machine with air flow in a reaction process, in order to ensure normal work of the air machine.