37 results about "Dimethyl disulfide" patented technology

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 5-chloro-2-methyl-4-isothiazoline-3-ketone. N,N'-dimethyl-3,3'-dithiodipropionamide is mixed with ethyl acetate, cooled to 8-10 DEG C, and chlorine is added in stages, and the reaction is continued after the chlorine is passed; the adding mode of the chlorine is as follows: in the first stage, 25-30% of the chlorine is passed in 0.5h while maintaining the temperature of the reaction system at 10-12 DEG C; in the second stage, 25-30% of the chlorine is passed in 1h while maintaining the temperature of the reaction system at 13-14 DEG C; and in the third stage, the remaining chlorine is passed in 1.5h while maintaining the temperature of the reaction system at 15-18 DEG C. The application controls the generation of 5-chloro-2-methyl-4-isothiazoline-3-ketone by controlling the adding amount of the chlorine and the reaction temperature, and improves the yield of 5-chloro-2-methyl-4-isothiazoline-3-ketone.

An oral care composition is provided and includes a natural flavor extract, a sulfur source such as dimethyl disulfide, a stannous ion source, and a soluble metal ion source that prevents the formation of methyl mercaptan. The natural flavor extract may contain dimethyl disulfide as an impurity. The soluble metal ion source may include a metal salt, a metal oxide, or a combination thereof, and the soluble metal ion source may include a copper ion source, a silver ion source, a zinc ion source, or combinations thereof.

The application provides a preparation method of methyl sulfonic acid, which is obtained by reacting raw material dimethyl disulfide with nitrogen oxide, air and water in a certain proportion. The method has high raw material utilization rate, is green and environment-friendly, and is easy to be industrialized. By controlling the content of methyl methyl sulfonate and 1-methyl-2-((methylsulfonyl) methyl) disulfane in the dimethyl disulfide, the colority of the separated product is lower, and the melting range of the product is narrower.

The invention relates to the technical field of chemical preparation, and discloses a process for preparing lithium sulfide through hydrogenation of dimethyl disulfide or di-tert-butyl polysulfide, which comprises the following steps: preparation of hydrogen sulfide: in a first reactor, carrying out hydrogenation reaction on an organic sulfur source and hydrogen in the presence of a hydrogenation catalyst to generate hydrogen sulfide mixed gas; the organic sulfur source is dimethyl disulfide or di-tert-butyl polysulfide; synthesis of lithium sulfide: introducing the hydrogen sulfide mixed gas into a second reactor filled with lithium source slurry for reaction to generate lithium sulfide; the lithium source slurry comprises a lithium source and a cosolvent; the lithium source is lithium hydroxide or lithium carbonate. A two-step process of hydrogen sulfide preparation and lithium sulfide synthesis separation is adopted, hydrogen sulfide is prepared by hydrogenation of an organic sulfur source in the first reactor and then conveyed to the second reactor to participate in synthesis, high-purity lithium sulfide is obtained through the scheme, and the content of polysulfide is extremely low.

The invention discloses sinorhizium xinjiangense APXJHT24-1 which has the functions of promoting growth and inhibiting aspergillus flavus, and the preservation number of the sinorhizium xinjiangense APXJHT24-1 is CCTCC (China Center for Type Culture Collection) M 2026229. According to the invention, the integration of two major functions of'generation of a characteristic antibacterial volatile matter of dimethyl disulfide 'and'efficient symbiotic nitrogen fixation' on a single strain is realized in Sinkiang Sinkiang rhizobium for the first time. The dimethyl disulfide released by the strain can accurately down-regulate expression of toxin synthesis key genes and spore development core genes in the aspergillus flavus, so that efficient bacteriostasis is realized on the molecular level. Through one-time inoculation, the strain can synchronously achieve the dual purposes of growth promotion and nitrogen fixation and source bacteriostasis at the rhizosphere ecological niche of the peanuts. Especially aiming at the biological characteristics of overground flowering and underground fruiting of peanuts, a lasting biological fumigation protection layer can be formed in a soil microenvironment in a legume development critical period.

The invention relates to a quantitative analysis method for determining trace dimethyl sulfide impurities in a dimethyl disulfide product, a high performance liquid chromatograph-variable wavelength detector is adopted for analysis, and the specific analysis method comprises the following steps: preparing a standard solution and a sample to be detected; and detecting the components of the sample to be detected by adopting a liquid chromatography system-variable wavelength detector (VWD). Wherein the detection conditions are as follows: a C18 chromatographic column, a quaternary pump and an automatic sampling system are adopted, a mobile phase A is ultrapure water, a mobile phase B is acetonitrile, the flow velocity is 0.8-1.2 mL / min, and the column temperature is 30-40 DEG C. According to the present invention, the strong ultraviolet response of DMDS is inhibited by using the high water phase environment, and the retention behavior and the peak shape of DMS are improved by using the solvation effect of the synergist so as to achieve the efficient separation of the main component and the trace impurity; in actual sample determination, the method successfully detects the residual trace DMS in the industrial grade disulfide, the result is stable and reliable, and the method is suitable for product quality control and process optimization.

The application provides application of n-methyl-n-pentyl thiourea as a collector in a sulfur-oxygen mixed copper-cobalt ore and a synchronous flotation method, and relates to the technical field of flotation. In view of problems of the traditional sulfur-then-oxygen process, such as a complicated process, a complex process, and influence of changes of oxidation and sulfidation rates on the flotation effect of the sulfidized copper-cobalt ore, the application provides a new flotation process and reagent, does not need to use a sulfidation agent for sulfidation, simultaneously floats and sulfidizes and oxidizes the copper-cobalt ore, and simultaneously floats the oxidized and sulfidized copper-cobalt ore by using an activator sodium dimethyl dithiocarbamate and a chelate collector n-methyl-n-pentyl thiourea. The flotation process of the application is simple, efficient, clean and efficient, and provides a new method, a new process and a new way for the flotation of the complex sulfur-oxygen mixed copper-cobalt ore.

The invention provides a carbon-coated nickel-chromium catalyst with an external sulfur source and a preparation method and application thereof, and the preparation method comprises the following steps: A) dissolving and mixing a nickel source, a chromium source and a carbon source in water, and removing a solvent to obtain a precursor; b) pyrolyzing the precursor in a protective atmosphere to obtain a catalyst precursor; and C) mixing the catalyst precursor with a sulfur source solution to obtain the carbon-coated nickel-chromium catalyst with the additional sulfur source, a sulfur source in the sulfur source solution comprises one or more of dimethyl sulfoxide, thioacetamide, thiourea, dimethyl disulfide, dimethyl sulfide and p-fluorothiophenol. According to the invention, a pre-sulfurization strategy of adding an organic sulfur source is innovatively adopted, so that the catalyst is endowed with low-temperature high efficiency, high selectivity and strong engineering suitability, and a bottom layer support is provided for kiloton-level industrial amplification.

The invention discloses a Karl Fischer moisture determination method for sulfur-containing organic compounds, and belongs to the technical field of chemical analysis. The method comprises the following steps: adding absolute methanol, imidazole and an inhibitor (selected from N-substituted maleimide or acrylate compounds) into a titration system, then adding a sample, and titrating with a pyridine-containing Karl-Fischer reagent to the end point. The inhibitor can effectively capture reducing sulfur species and eliminate interference of the reducing sulfur species on iodine. Experiments show that for sulfur-containing samples such as 2, 2-dimethylthiopropane, dimethyl sulfide, dimethyl disulfide and the like, the deviation reduction rate of the method is more than 60% compared with that of a traditional method; the method is easy and convenient to operate, high in accuracy and suitable for moisture analysis of sulfur-containing organic matter in the fields of petrifaction, pharmacy and the like.

Examples of a biocide composition include an activated halogen compound selected from the group consisting of 2,2-dibromo-3-nitrlopropionamide; 2-bromo-2-nitropropane-1,3-diol; and 1,2-dibromo-2,4-dicyanobutane; benzisothiazolin-3-one; a pyridine-N-oxide selected from the group consisting of zinc pyrithione and sodium pyrithione; and a carbamate derivative selected from the group consisting of 3-iodo-2-propynyl butyl carbamate; zinc bis(dimethyldithiocarbamate); and bis(dimethyl carbamoyl) disulfide.

The invention relates to a method preparing a carbonated alcoholic beverage having an ethanol content of 2-12% ABV and a water content of at least 80 wt.%, said method comprising combining: • 0.03-10 parts by weight of beer distillate having an ethanol content of 50-98 wt.% and comprising 200-2,000 mg / kg of amyl alcohols, the beer distillate containing ethyl acetate and amyl alcohols in a weight ratio of ethyl acetate : amyl alcohols of less than 1:30; • 2-30 parts by weight of ethanolic liquid having an ethanol content of 25-100 wt.%; • 0.3-10 parts by weight of fruit juice concentrate; • 0.2-1.2 parts by weight of carbon dioxide; • 60-90 parts by weight of water. The beverage obtained by this method has a unique appealing taste. The beer distillate is an essential component of the beverage. The beer distillate combines a high ethanol content with a high content of amyl alcohols and other beer flavour components having a boiling point in the range of 80-210 °C, such as isoamyl acetate, ethyl caproate, furfural, linalool and dimethyl disulfide.

The application belongs to the field of gas sensors, discloses a kind of indium oxide composite material based on palladium doping and its preparation method and application, its preparation process is to utilize indium nitrate, anhydrous ethanol, ammonia, deionized water to prepare indium oxide material, then doping palladium ion in indium oxide solution to obtain palladium ion doped indium oxide solution, using sodium borohydride reduction, centrifugal to obtain palladium doped indium oxide composite material, then prepare into gas sensor.The application can effectively solve the problems of high activation energy required for pure indium oxide gas sensor reaction and lack of selectivity of pure semiconductor surface to sulfide by improving the design of key process flow of preparation method, and realizes the detection of dimethyl disulfide gas.

The invention relates to a method preparing a carbonated alcoholic beverage having an ethanol content of 2-12% ABV and a water content of at least 80 wt.%, said method comprising combining: · 0.03-10 parts by weight of beer distillate having an ethanol content of 50-98 wt.% and comprising 200-2,000 mg / kg of amyl alcohols; · 2-30 parts by weight of ethanolic liquid having an ethanol content of 25-100 wt.%; · 0.3-10 parts by weight of fruit juice concentrate; · 0.2-1.2 parts by weight of carbon dioxide; · 60-90 parts by weight of water. The beverage obtained by this method has a unique appealing taste. The beer distillate is an essential component of the beverage. The beer distillate combines a high ethanol content with a high content of amyl alcohols and other beer flavour components having a boiling point in the range of 80-210 °C, such as isoamyl acetate, ethyl caproate, furfural, linalool and dimethyl disulfide.

An oral care composition is provided and includes a hops extract, where the hops extract includes dimethyl disulfide, a stannous ion source, and a stabilizing system including a Michael acceptor. The Michael acceptor has an alpha, beta-unsaturated carbonyl group. The alpha, beta-unsaturated carbonyl group can include an aldehyde, a ketone, a cyclic ketone, or a combination thereof.

The invention belongs to the technical field of fermentation engineering, and particularly relates to Wickerhamomyces anomalus JG-WA1 and application thereof in aroma-enhancing fruit wine. A strain of aroma-enhanced Wickerhamomyces anomalus JG-WA1 is screened from distiller's yeast, apple juice is inoculated with the strain for primary fermentation, then saccharomyces cerevisiae is inoculated for secondary fermentation, and the aroma-enhanced fruit wine is prepared. The content of unpleasant odor substances such as acetone, 4-methyl-1-pentanol, 2-butanol, dimethyl disulfide, 3-hexanone and the like with pungent smell of alcohol or mildew odor and the like in the fruit wine is obviously reduced, while the content of 2-pentanol, ethyl propionate, propyl acetate, 3-methyl-2-pentanone, 3-pentene-2-ketone, hexyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, 2-octanone, 2, 3-pentanone, ethyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate and ethyl hexanoate is obviously reduced. The content of fruit flavor components such as 2, 3-dimethylpyrazine is greatly increased, the brewed apple wine is obvious in ester flavor and transparent and bright in color, and the flavor quality is obviously improved.

The present application relates to the technical field of microbial strains and the technical field of soybean seed coat fermentation, in particular to a Pediococcus sp. of Pteropus sp. and application thereof in improving the flavor of soybean seed coat, wherein the Pediococcus sp. of Pteropus sp. is Pediococcus sp. of Pteropus sp. BL-2 (Lactococcus petauri BL-2) , which is preserved in China Center for Type Culture Collection with a preservation number of CCTCC NO: M 20252253. The Pediococcus sp. of Pteropus sp. BL-2 of the present application not only has significant antioxidant activity, but also can significantly increase the content of 3-hydroxy-2-butanone (acetoin) with a pleasant buttery flavor in soybean seed coat and significantly reduce the content of isovaleric acid, 2-methyl-2-pentenal and dimethyl disulfide and other substances with strong irritating odor after fermentation of soybean seed coat, thereby effectively improving the flavor of soybean seed coat.

This invention discloses a method for preparing methanesulfonic acid with low sulfate residue. The method includes the following steps: in a batch reactor, using dimethyl disulfide with a dimethyl polysulfide content of less than 350 ppm, preferably less than 220 ppm, as raw material, the reaction is carried out in the presence of a catalyst and an oxidant; after the reaction is terminated, the reaction solution is post-treated to obtain methanesulfonic acid. This invention solves the problem of high sulfate content in the product methanesulfonic acid by controlling the dimethyl polysulfide content in the raw material, resulting in a higher quality product and a significant reduction in the content of heavy component impurities. This not only improves the product yield but also simplifies the deweighting process or reduces energy consumption.

The invention discloses a low-temperature lithium-sulfur battery based on monatomic catalysis and organic sulfur electrolyte and a preparation method of the low-temperature lithium-sulfur battery. The low-temperature lithium-sulfur battery comprises a lithium negative electrode, a sulfur-carbon positive electrode, an organic sulfur added electrolyte and a monatomic catalyst modified diaphragm, and organic sulfur comprises dimethyl disulfide, tert-butyl disulfide, diphenyl disulfide, p-p-toluene disulfide, bis (2-nitrophenyl) disulfide, dibenzyl disulfide, diallyl disulfide, 4, 4 '-dipyridyl disulfide, 2, 2'-dithiobipyridine, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature lithium-sulfur battery is one or more of 1, 1 '-dithiobis (caprolactam), 3, 3'-dithiobis (1-propanesulfonic acid) disodium salt, 2, 2 '-[dithiobis (methylene)] difuran, 3, 3'-dithiobis (propionitrile) and carbon disulfide. And the organic sulfur is added into the electrolyte to generate an intermediate product organic polysulfide through interaction between the organic sulfur and the polysulfide so as to realize depolymerization of polysulfide clusters in a low-temperature environment.

The invention relates to the technical field of hydrogenation catalyst sulfuration, and particularly discloses a sulfuration method of a hydrogenation catalyst. The vulcanization method comprises the following steps: S1, dispersing dimethyl disulfide and an additive in cyclohexane to obtain vulcanized oil; s2, filling a hydrogenation catalyst, heating and drying in a nitrogen atmosphere, injecting vulcanized oil, heating and vulcanizing, vulcanizing in three stages, naturally cooling to 140-150 DEG C, switching nitrogen purging, cooling to room temperature, and storing the catalyst for later use; compared with the prior art, according to the vulcanization method, the additive is added to play a bridging role in the vulcanization process, the vulcanization effect is improved, and therefore the stability of the overall catalytic activity is guaranteed.

The present application relates to a kind of converter gas desulfurization purification process.Converter gas raw gas is first treated by TSA, then enters hydrolysis desulfurization tower for desulfurization;Desulfurized gas enters deoxidation reactor for deoxidation, and the purified gas after deoxidation is divided into two parts, one part is pressurized by circulating fan and goes to beat cycle;One part is cooled to 40 DEG C after converter gas heat exchange, water cooling and goes to decarburization;The gas after decarburization is directly into desulfurization tower to remove trace COS, CS2, then enters fine desulfurization tower to remove trace mercaptan and dimethyl disulfide.By this process, it can meet the technical requirements of sulfur content less than 0.1mg / Nm 3 , oxygen content is less than 30ul / L, the process has the characteristics of simple flow, high desulfurization purification degree, low investment and operating cost.

The invention discloses a method for preparing malathion by adopting a solid acid catalyst, and belongs to the technical field of organophosphorus pesticide synthesis. O, O-dimethyl dithiophosphoric acid and diethyl maleate are used as raw materials, solid acid is used as a catalyst, and addition reaction is performed to prepare malathion; the solid acid is selected from one or more of ethylenediaminetetraacetic acid, sulfonated carbon, sulfate zirconium oxide and silicon-aluminum oxide. The process provided by the invention breaks through the technical bottleneck of catalyst selection in malathion synthesis, solves the environmental protection pain point and the efficiency bottleneck in the prior art through innovative application of specific solid acid, and has the advantages of recoverable catalyst, high raw material conversion rate, excellent product purity, simple process, low energy consumption and the like. The method does not need to greatly transform the existing industrial production device, can be directly popularized and applied, can effectively reduce the production cost, reduce the environmental pollution and improve the product competitiveness, is suitable for large-scale production of agricultural, hygiene and epidemic prevention and medicinal malathion, and has wide industrial application prospects and remarkable economic, social and environmental benefits.

A method for producing methylsulfonic acid with a low sulfate residue, comprising the steps of: reacting dimethyl disulfide, which has a dimethyl polysulfide content of less than 350 ppm, preferably less than 220 ppm, as a raw material in a kettle reactor in the presence of a catalyst and an oxidizing agent; and, after the reaction is complete, post-treating the reaction solution to obtain methylsulfonic acid. By controlling the dimethyl polysulfide content in the raw material, the problem of high sulfate content in the methylsulfonic acid product can be solved, resulting in a high-quality product with a significantly reduced heavy impurity content. This not only improves the product yield but also contributes to simplifying the heavy impurity removal process and reducing energy consumption.

This invention discloses a process for improving the yield strength of wind turbine main shafts. The chemical composition of the main shaft steel, by mass percentage, includes: C 0.38–0.45%, Si 0.20–0.40%, Mn 0.50–0.80%, Cr 0.90–1.20%, Mo 0.15–0.25%, Ni 0.40–0.60%, Cu≤0.05%, P≤0.010%, S≤0.002%, O≤0.0015%, N≤0.006%, H≤0.0002%, with the balance being Fe and unavoidable impurities. The tempering method includes normalizing pretreatment, austenitizing heating, pre-cooling treatment, PAG quenching liquid staged cooling, and tempering. During the tempering stage, a nitrogen-ethanol-dimethyl disulfide mixed atmosphere is pulsedly injected into the furnace. After the dimethyl disulfide decomposes at high temperature, it reacts with Mn in the steel to form a dispersed MnS nano-precipitate phase on the surface. This invention enables the main shaft steel to achieve a room temperature yield strength ≥750 MPa, an impact energy ≥150 J at -40℃, and excellent resistance to hydrogen-induced cracking, thus meeting the long-term use requirements of large-megawatt offshore wind turbines under complex operating conditions.

The invention provides a methyl mercaptan oxidation catalyst and a preparation method thereof, and the method comprises the following steps: treating attapulgite powder with a strong alkali solution, and roasting to obtain purified attapulgite powder; preparing an active metal precursor solution, wherein active metal comprises alkaline earth metal, cerium and rare earth metal; dipping the purified attapulgite powder in an active metal precursor solution, and roasting to obtain catalyst powder; and mixing the catalyst powder with a binder, shaping, and carrying out secondary roasting to obtain the methyl mercaptan oxidation catalyst. The methyl mercaptan oxidation catalyst provided by the invention can effectively catalyze and oxidize methyl mercaptan to produce dimethyl disulfide, and is high in catalytic efficiency and high in product yield; meanwhile, the catalyst disclosed by the invention has certain water resistance, and can prevent moisture in feed gas from influencing the yield of dimethyl disulfide.

The invention belongs to the technical field of synthesis of rubber auxiliaries, and relates to a method for preparing high-crystal-form TMTD (tetramethylthiuram disulfide) through seed crystal induced hydrogen peroxide-chlorine step-by-step oxidation. Heating the sodium dimethyl dithiocarbamate solution, and then dropwise adding a hydrogen peroxide solution containing organic acid to generate TMTD microcrystals. Chlorine is slowly introduced into a system containing the seed crystal until the PH of the system is reduced to 1.0-2.0, and a reaction solution is obtained; and carrying out a neutralization reaction on the reaction liquid, directionally crystallizing, filtering, washing and drying to obtain a TMTD product. Through a step-by-step oxidation process, accurate control of the reaction process is realized, and side reactions are effectively inhibited. The in-situ generated TMTD microcrystal is used as a seed crystal, so that the crystal morphology and particle size distribution of a final product are remarkably improved. The whole process is mild in condition, simple to operate and suitable for industrial production.

The invention discloses a method for detecting methyl methylthiosulfonate in methanesulfonic acid, which comprises the following steps: hydrolyzing methyl methylthiosulfonate to generate methyl mercaptan, oxidizing the methyl mercaptan into dimethyl disulfide, and detecting whether the methanesulfonic acid contains methyl methylthiosulfonate and the content of methyl methylthiosulfonate according to the recovery rate of the dimethyl disulfide. The detection method is simple, methyl mercaptan is directionally generated from methyl methylthiosulfonate under the alkaline mild condition, side reactions are few, the reaction conversion rate is easy to control, methyl mercaptan can be precisely dimerized into dimethyl disulfide under the mild oxidizing agent, no excessive chemical degree oxidation by-products exist, and the method is suitable for industrial production. Whether methyl thiosulfonate exists in methanesulfonic acid or not and the content of methyl thiosulfonate can be accurately detected.

The present application belongs to the technical field of rare earth hydrometallurgy, and particularly relates to a purifying agent for treating a lead-containing rare earth solution and an application method. The purifying agent comprises the following raw materials in parts by weight: a sulfur source 5-30 parts, a magnesium source 3-15 parts, and water 40-95 parts; the sulfur source is any one or a combination of two of sodium dimethyl dithiocarbamate and sodium diethyl dithiocarbamate, and sodium pentathiocarbonates; the magnesium source is any one of magnesium chloride, magnesium sulfate, and magnesium nitrate. The present application improves the temperature and acidity application range of the purifying agent, reduces the cooling and neutralization cost of the rare earth solution, utilizes the insolubility of the purifying agent to avoid the residue of excessive purifying agent in the rare earth solution, forms a magnesium polysulfide carbonate salt, improves the ability of magnesium to replace lead ions, and ensures that the lead content in the rare earth solution is removed to a qualified level.

The invention discloses bradyrhizobium japonicum APFJPT-23-4 which has dual functions of promoting plant growth and strongly inhibiting aspergillus flavus and toxin synthesis, and an application of the bradyrhizobium japonicum APFJPT-23-4. The invention further discloses a preparation method of the bradyrhizobium japonicum APFJPT-23-4. The preservation number of the strain is CCTCC (China Center For Type Culture Collection) M 20253050. According to the invention, the technical limitation of single function of the existing rhizobium is broken through, and the integration of dual functions of symbiotic nitrogen fixation and growth promotion and volatile inhibition of aspergillus flavus growth, spore production and toxin production is realized in the same strain for the first time. By inoculating the strain, the growth and nodulation of peanut plants can be remarkably promoted; meanwhile, the released volatile key effector molecule-dimethyl disulfide can efficiently inhibit the development of aspergillus flavus and the synthesis of toxins. The invention provides a brand new microbial resource and technical scheme with proprietary intellectual property rights for synchronously realizing green yield increase of crops and field source prevention and control of mycotoxin in the same microbial system.

The invention discloses an efficient dimethyl disulfide rectification separation device, and belongs to the technical field of rectification separation. Aiming at the problem that the internal structure of a light component removal tower in the existing product is easily blocked by impurities and needs to be frequently maintained, the invention provides the following technical scheme: the light component removal tower comprises two rectifying tower units, a filter main body and a tower bottom conveying pump main body, the rectifying tower unit on the left side serves as a light component removal unit, and the rectifying tower unit on the right side serves as a refining unit. The liquid collecting mechanism is arranged to replace an existing liquid collector, a retention plate is arranged on the liquid collecting mechanism and used for reinforcing retention of impurities mingled in liquid, a sleeve is arranged in a hole for liquid passing, a hole is formed in the high position of the sleeve, so that the liquid passes at the high position, a spraying piece is arranged upwards in the liquid distribution mechanism, and the liquid distribution efficiency is improved. Therefore, the service life of the equipment is prolonged, the manual maintenance frequency is reduced, the burden of workers is relieved, and the product processing efficiency of the equipment is improved.