180 results about "Biodiesel" patented technology

The invention relates to the field of biodiesel catalytic materials, and particularly discloses a catalyst for kitchen waste oil, a preparation method and biodiesel. The catalyst for the kitchen waste oil is prepared from a Fe3O4-SiO2-Pr < 3 + > nano-particle carrier and a lipase solution, the catalyst is prepared from a Pr (NO3) 3 solution doped with Pr < 3 + > being 0.88-0.92 wt%, the lipase solution is a pseudomonas lipase solution with the concentration being 22-28 mg / mL, and the pH is 7.0; the preparation method comprises the following steps: preparing Fe3O4 nanospheres, coating the surfaces of the Fe3O4 nanospheres with SiO2 layers, dipping the Fe3O4 nanospheres in a Pr (NO3) 3 solution, carrying out calcination treatment to obtain a Fe3O4-SiO2-Pr < 3 + > nanoparticle carrier, placing the carrier in a lipase solution, carrying out adsorption fixation, and separating out the carrier to obtain the catalyst. The catalyst is used for processing biodiesel and has the advantages of being easy to recycle, high in loading capacity, low in activity loss and good in stability.

The invention discloses a method for efficiently preparing a fatty acid type anti-wear agent based on biodiesel, which comprises the following steps: freezing and crystallizing the raw material biodiesel, filtering, evaporating and dealcoholizing, carrying out enzyme hydrolysis, insulating and layering, and rectifying under reduced pressure to finally obtain the fatty acid type anti-wear agent. Wherein the fatty acid composition of the crude methyl ester can be directionally regulated and controlled through freezing crystallization and filtering processes; through the synergistic effect of enzyme hydrolysis reaction and high-vacuum rectification separation coupling, efficient production of the fatty acid anti-wear agent prepared from biodiesel is achieved, the production period is greatly shortened, and the product quality is improved. According to the technology disclosed by the invention, the high-quality fatty acid type anti-wear agent can be produced economically, greenly, efficiently and stably, and the acid value of the product is stabilized between 198-203mgKOH / g oil and meets the Q / SHCG 57-2017 standard. The method has the advantages of low raw material requirement, wide application range, high production efficiency, high product quality, reproducible and reusable catalyst and the like, and is suitable for industrial production.

The invention relates to the technical field of catalysts, and particularly discloses a Ni-Cu-CeO2 / ZrO catalyst for improving oxidation stability of biodiesel and a preparation method of the Ni-Cu-CeO2 / ZrO catalyst. The invention discloses a Ni-Cu-CeO2 / ZrO catalyst for improving oxidation stability of biodiesel. The Ni-Cu-CeO2 / ZrO catalyst comprises a carrier, an active component and an auxiliary agent, the carrier is a CeO2-ZrO2 composite oxide; the active components are Ni and Cu; ni accounts for 3-5 wt% of the mass of the catalyst, and Cu accounts for 1-3 wt% of the mass of the catalyst; the auxiliary agent is La2O3; the preparation method comprises the following steps: firstly preparing the CeO2-ZrO2 carrier by adopting a coprecipitation method, then impregnating nickel nitrate, copper nitrate and lanthanum nitrate in an isopyknic manner, and then carrying out stepped roasting to obtain the catalyst. The catalyst has high catalytic activity and stability, unsaturated fatty acid ester in biodiesel can be removed, the oxidation stability of the biodiesel is improved, and the cost of the catalyst is lower than that of a noble metal catalyst.

The invention belongs to the field of biofuel preparation through grease hydrogenation, and provides a catalyst for biofuel preparation through waste grease one-step hydrogenation and a preparation method of the catalyst. The catalyst is a non-supported NixMoyWz-kHY catalyst, and the preparation method of the catalyst comprises the following steps: uniformly mixing a nickel source, a molybdenum source and a tungsten source according to a certain proportion, adding deionized water and a reaction aid ethylene glycol, dissolving, heating, stirring, adding an ammonia water-ethanolamine mixed solution, complexing, steaming until the pH value of the solution is 7-8, and filtering to obtain the catalyst. And adding a certain amount of HY molecular sieve powder, methyl cellulose (MC) and citric acid into the solution, filtering the reaction solution, drying the filter cake at 120 DEG C, performing extrusion molding, and roasting to obtain the catalyst. The catalyst provided by the invention effectively solves the problems of high oxygen content, difficulty in deep isomerization and the like in the waste oil and fat, has the functions of hydrodeoxygenation, cracking and isomerization at the same time, and realizes one-step conversion of the waste oil and fat into biological aviation kerosene and biodiesel. Besides, the non-supported catalyst adopted by the invention has high-activity center density, the problems of aging and shedding of the carrier are not needed to be worried about, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

The utility model relates to the technical field of biodiesel production, in particular to a catalyst separation and recovery device for converting waste oil and fat into biodiesel, which comprises a separation tank. A feed pipe is fixedly connected to the rear position at the upper end of the separation tank, a waste discharge pipe is fixedly connected to the middle position at the lower end of the separation tank, two observation windows are fixedly connected to the front surface of the separation tank, and two adjusting components are arranged at the front position at the upper end of the separation tank. The adjusting components include a positioning sleeve, a connecting seat, a threaded sleeve, a first bevel gear, a second bevel gear, an electric motor, a threaded pipe, a connecting block, a positioning block, a discharge pipe, a first suction pipe, a second suction pipe, a positioning rod and a limiting block; the threaded pipe is driven to lift through the adjusting components, so as to adjust the heights of the first suction pipe and the second suction pipe, so that the floating oil and esterified glycerol can be accurately sucked, the separation quality of the esterified glycerol is effectively improved, the purity of the catalyst recovery is further improved, and the waste of the esterified glycerol is avoided.

The application discloses a method for preparing a hydrogenation deoxidation intermediate by using conjugated fatty acids and application thereof, and belongs to the technical field of oil production biofuel. The method comprises the following steps: (1) subjecting conjugated fatty acids and a dienophilic monomer to a Diels-Alder addition reaction to obtain an addition product; and (2) removing unreacted raw materials from the addition product, so that the hydrogenation deoxidation intermediate is obtained. The method breaks the traditional idea of deoxidation first and isomerization later, and instead adopts the idea of "structure modification first and hydrogenation deoxidation later" to prepare the hydrogenation deoxidation intermediate, so that the hydrogenation isomerization process can be omitted, the generation of cracking products is reduced, the content of isomerization products in the biodiesel is significantly improved, and higher-quality biofuel is obtained.

The present application provides a kind of biodiesel drilling fluid and its preparation method and application, the biodiesel drilling fluid includes the combination of water phase, oil phase, emulsifier, wetting agent, organic soil, filtrate reducer and quicklime, and the oil phase is biodiesel;With the biodiesel as oil phase, water phase and other additives are matched, so that the biodiesel drilling fluid obtained has the advantages of environmental protection, low price, low biological toxicity and easy degradation;And under the low addition amount of emulsifier, stable water-in-oil emulsion can still be formed, and it also has the advantages of low oil-water ratio, high viscosity and shear, strong rock-carrying capacity, good rheological property and good suspension stability.

The application discloses a kind of bifunctional catalyst and its application in microwave-assisted preparation of biodiesel, belong to catalysis technical field.The application introduces cobalt metal in ZIF-8 skeleton, when MOFs derivative is prepared by calcination, the introduction of transition metal can construct magnetic center, adjust the magnetic loss ability of derivative material, so that the prepared catalyst has strong wave-absorbing performance under 2.45GHz industrial microwave field, can effectively absorb microwave energy and convert it into heat energy, thereby improving the energy utilization efficiency of reaction system, and finally improving the catalytic performance of catalyst, further improve the preparation efficiency of microwave-assisted biodiesel, and has good application value and prospect in catalysis technical field.

A drilling fluid composition is provided herein. The drilling fluid composition comprises biorenewable components, such as a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil. The drilling fluid composition is thus more environmentally friendly than conventional, petroleum-based alternatives. Water-based and oil-based drilling fluids comprising the drilling fluid composition are also provided as are methods of lubricating a borehole (e.g., a downhole well) utilizing the drilling fluid composition.

The invention relates to the technical field of biofuels, and discloses an aviation kerosene biological alternative fuel based on multi-objective optimization, which is characterized in that a comprehensive selection index system comprising density, kinematic viscosity, thermodynamic characteristics (lower calorific value and hydrogen-carbon ratio) and molecular weight is established based on a multi-objective optimization model constructed by a genetic algorithm; the invention discloses a biological fuel formula for replacing RP-3 aviation kerosene by optimizing the design of biological alternative fuel components, the biological alternative fuel is prepared from the following components in parts by volume: 70-80 parts of second-generation biodiesel, 10-15 parts of tetrahydrofuran and 7-15 parts of isopropanol, the components are easy to obtain, the production process is simple, and the biological alternative fuel is suitable for large-scale production. The second-generation biodiesel, tetrahydrofuran and isopropanol are used as raw materials, the obtained biofuel has low kinematic viscosity, the low calorific value reaches 43 MJ / kg or above, the physicochemical property of the biofuel is similar to that of RP-3 aviation kerosene, and the biofuel has good substitutability and wide popularization value.

The utility model discloses a kind of deep-frying smoke exhaust heat recovery structure, it is related to heat recovery field.The utility model includes: water storage component, the inside of water storage component is equipped with heat exchange component, one end of heat exchange component is equipped with smoke inlet pipe, the other end of heat exchange component is equipped with separation component, the inner wall of separation component is slidably cooperated with two filter components.The utility model is filtered to flue gas by being equipped with filter component, waste oil is separated from smoke, play the role of purifying flue gas, waste oil is stored in oil tank, so that staff can secondary processing to waste oil, for producing biodiesel or other industrial use, so not only recycle heat energy, but also realize the resource utilization of waste oil, improve overall economic benefit;Through the heat exchange component of being equipped with, heat is introduced into water storage component, water source in water storage component is heated for standby, greatly improve the utilization of heat.

The invention relates to a method for removing free fatty acids and optionally water from the oils and fats used for the production of biodiesel and from the crude esters produced during the production of biodiesel by extracting the free fatty acids with a mixture of basic organic nitrogen compounds and water as an extraction agent.

The present invention provides a method for producing biodiesel fuel containing saturated hydrocarbons as a main component under relatively mild conditions using vegetable oils or animal fats as a raw material. [Solution] This is a method for producing biodiesel fuel from vegetable oils or animal fats, comprising a decarboxylation step in which carbon dioxide is removed from ester groups in the vegetable oils or animal fats using a decarboxylation catalyst to produce hydrocarbons, and a hydrogenation step in which the resulting hydrocarbons are hydrogenated using a hydrogenation catalyst to produce diesel fuel consisting of saturated hydrocarbons, wherein the decarboxylation step and the hydrogenation step are carried out in the stated order, and each of the decarboxylation step and the hydrogenation step is carried out under a pressure of 0.2 MPa or less.

The utility model belongs to the technical field of biodiesel lipase recovery, and particularly relates to a biodiesel lipase recovery centrifugal machine which comprises a horizontal spiral screen centrifugal machine body and a flow gathering bin, the top end of a feeding pipe of the horizontal spiral screen centrifugal machine body is fixedly connected with a communicating pipe, one end of the communicating pipe is fixedly connected with a feeding storage tank, and the other end of the communicating pipe is fixedly connected with a discharging storage tank. An isolation bin is fixedly connected to the inner wall of the feeding storage tank, a feeding notch is formed in the side wall of the feeding storage tank, an upper thin liquid feeding pipe is fixedly connected to the side wall of the horizontal spiral screen centrifugal machine body, a dilution suction pump is installed on the upper thin liquid feeding pipe, and a circulating dilution pipe is installed on the side wall of the upper thin liquid feeding pipe; the upper thin liquid feeding pipe, the dilution suction pump and the circulating dilution pipe are matched to suck low-concentration liquid and convey the low-concentration liquid to the feeding position of the feeding pump, and the low-concentration liquid and the high-concentration liquid are mixed, so that the concentration of the liquid conveyed to the feeding pipe of the horizontal spiral screen centrifuge body can be effectively reduced.

The invention relates to the technical field of biodiesel, in particular to high-calorific-value biodiesel based on a modified formula and a preparation method thereof.The preparation method comprises the following steps that S1, catering waste grease is pretreated, and pretreated catering waste grease is obtained; s2, carrying out esterification treatment on the pretreated catering waste grease, and adopting a composite treatment agent in the treatment process to obtain a crude product; s3, the crude product is subjected to catalytic cracking quality improvement, and a cracking product is obtained; s4, carrying out hydrogenation saturation treatment on the cracking product to obtain a mixed alkane product; and S5, carrying out purification and fractionation on the mixed alkane product to obtain the high-calorific-value biodiesel. According to the invention, after oil and alcohol are adsorbed into the spaces, the concentration of reactants is locally improved, and the reactants are limited around acidic sites, so that the reaction efficiency is greatly improved, the conversion efficiency of the biodiesel is effectively improved, and the calorific value performance of the biodiesel is further improved.

The application discloses a waste oil and fat biological continuous skid-mounted type biodiesel preparation equipment, which comprises a casing, a stirring barrel is rotationally connected to the top surface of the casing, a feeding hole is formed in the top surface of the stirring barrel, a plurality of first heaters are installed on the circumferential outer side of the stirring barrel, and a plurality of stirring assemblies are installed in the stirring barrel. The application realizes the purposes of efficient crushing, uniform fusion and sufficient reaction of soapstock, and also realizes the purposes of slowly eccentric rotating of the sedimentation barrel driven by the eccentric shaft, forming an alternating flow field, promoting the three-phase separation of oil, water and slag, and strengthening the sedimentation effect, shortening the sedimentation period through the micro-vibration mechanism. The knocking vibration mechanism is used for reducing the hanging material of the barrel wall, improving the stirring efficiency and guaranteeing the sufficiency of the reaction. The hollow rotating shaft, the transfer cylinder and the nozzle are used for guaranteeing the accurate dispersion of the reagent, saving the reagent consumption and improving the reaction quality.

The invention discloses equipment for preparing pure biodiesel and relates to the field of pure biodiesel preparation.The equipment comprises a tank body, a tank cover is arranged at the upper end of the tank body, a material conveying pipeline is arranged at the front end of the outer portion of the tank body, a support is arranged outside the tank body, and a base is arranged at the bottom of the support; the equipment comprises a support, an upper cap is arranged at the top of the support, a motor body is arranged on one side of the upper cap, a driving wheel is arranged at the top of the motor body, and the driving wheel is sleeved with a conveying belt. The built-in toothed ring frame drives the arc-shaped rack and the mixing barrel to move around the stirring blades, the symmetrical conical structure of the mixing barrel can stir materials in the tank body in a surrounding mode, and the collision strips outside the mixing barrel can crush particles with large hardness in the materials, so that the materials are rapidly crushed, and the material pretreatment efficiency is improved.

The application discloses a solid-phase preparation method of sulfonated chitosan membrane and application of the sulfonated chitosan membrane in catalytic biodiesel preparation, and the sulfonated chitosan membrane is prepared by the following steps: chitosan powder is suspended in a dispersant in which a sulfonating agent is dissolved to perform a sulfonating reaction, sulfonated chitosan powder is obtained through solid-liquid separation, the sulfonated chitosan powder is dissolved in a membrane solvent to prepare a casting membrane liquid, the casting membrane liquid is naturally cast on a glass surface to form a membrane, and the sulfonated chitosan membrane is obtained after drying and removing the membrane solvent. The sulfonated chitosan membrane is added into a mixed solution of fatty acid and methanol, and after stirring and heating for a period of time, the sulfonated chitosan membrane is taken out, and biodiesel is obtained after removing methanol from the solution. The sulfonated chitosan membrane prepared by the application has the advantages of fast mass transfer rate, high catalytic efficiency and easy separation, and under the conditions of an alcohol / oil ratio of 10:1, a reaction temperature of 65 DEG C, a catalyst dosage of 5wt%, and a reaction time of 3h, the esterification rate reaches 92.29%. Under the same conditions, the esterification rates of powdered chitosan and commercially available macroporous ion exchange resin are 57.73% and 33.0% respectively.

A combustion head assembly for a burner that reduces combustion byproduct and oil pooling on a flame ring stabilizer or air diffuser element during normal operational cycling. The polymeric bushing directs away or prevents a non-combusted fuel in the fuel line interior portion from the nozzle end after a combustion cycle, and is fabricated from a polymeric material having thermal / electrical insulating properties, which is resistant to decomposition, dissolution, or breakdown when exposed to No. 2 fuel oil, biodiesel fuel oil, such as fluoropolymers, including PTFE (Teflon), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), ethylene-based fluoropolymers (ETFE / ECTFE), and / or polyvinylidene fluoride (PVDF), polyether ether ketones (PEEK), polyphenylene sulfide (PPS), and / or fluoroelastomers (FKM), or acrylonitrile butadiene styrene (ABS). The polymeric bushing is situated within a fuel line interior portion behind a nozzle element, having a channel or bore extending from end to end and in fluid communication with the nozzle element opening.

The present application provides a method for improving the yield of biodiesel, comprising: contacting and reacting low-acid-value oil and fat with monohydric alcohol in the presence of metal oxide or sulfide catalyst, characterized in that carboxylic acid or high-acid-value oil and fat is additionally added. The method of the present application can effectively solve the problem of low activity of various metal oxide or metal sulfide catalysts when used for preparing biodiesel from low-acid-value oil raw materials, expand the application range of oxide or sulfide catalysts, obtain high-yield biodiesel at lower temperature and pressure, and greatly reduce the investment in devices since the reaction is carried out at low pressure.

This invention relates to a method for producing biodiesel from beef tallow obtained from slaughter by-products. Specifically, it concerns how to pretreat the beef tallow using pressure distillation and filtration, then mix it with alcohols and a basic catalyst under optimized conditions for esterification, followed by a systematic post-processing procedure to produce high-quality biodiesel. According to the manufacturing method of this invention, the pretreatment conditions, reaction conditions, and post-processing are all optimized, thereby enabling the economical production of high-quality biodiesel with high yield.

The utility model relates to the technical field of purification devices, and discloses a methyl palmitate multiple purification device for biodiesel, which comprises an equipment bottom plate, the upper surface of the equipment bottom plate is fixedly connected with a purification box, and the inner wall of the purification box is fixedly connected with a bracket, a driving motor, a stirring structure and a heater. The methyl palmitate filtering device is reasonable in structure, methyl palmitate is melted through the heater, the methyl palmitate can be filtered through the upper-layer filter plate, the melted methyl palmitate flows into the upper surface of the lower-layer filter plate, impurities contained in the methyl palmitate are purified and filtered for multiple times, and the purity of the methyl palmitate is improved. A pressing plate moves downwards to flatten methyl palmitate through a lifting hydraulic rod, the methyl palmitate is cooled through a refrigeration plate to be shaped, the methyl palmitate can be quantitatively and uniformly discharged through an electromagnetic valve, the methyl palmitate is cooled and shaped, and a push plate moves rightwards through a collecting hydraulic rod, so that the methyl palmitate is uniformly discharged. Methyl palmitate needs to be manually collected after being purified and shaped, and time and labor are wasted.

The application discloses an open supercritical carbon dioxide energy storage system and an operation method thereof, which comprises a thermal power plant unit, a supercritical carbon dioxide energy storage unit, a calcium carbonate heat storage unit and a microalgae unit; carbon dioxide discharged from the thermal power plant unit is used as a working medium of the supercritical carbon dioxide energy storage; the supercritical carbon dioxide energy storage unit can store surplus power during a wind energy and solar energy power generation peak period; the calcium carbonate heat storage unit can store compression heat in a compression process and solar heat, and the stored heat is used for preheating before supercritical carbon dioxide expansion; the microalgae unit can use the discharged carbon dioxide after work is finished as raw material of a microalgae reaction to generate biodiesel; during the wind energy and solar energy power generation peak period, the energy storage time can be prolonged, and the supercritical carbon dioxide can be sealed to the seabed, so that the problems of high carbon emission of the thermal power plant and randomness and fluctuation of the wind energy and the solar energy are solved.

The invention relates to the technical field of biological catalysis, in particular to cyclodextrin-metal organic framework immobilized lipase, a preparation method and application of the cyclodextrin-metal organic framework immobilized lipase in grease catalysis. The cyclodextrin-metal organic framework immobilized lipase provided by the invention is simple in preparation process and controllable in cost, and has the advantages of high catalytic efficiency, good stability, strong reusability and the like; when the catalyst is applied to a grease catalytic reaction, the reaction condition is mild, the product is easy to separate, and the catalyst can be widely applied to the industrial fields of food processing, biodiesel preparation, fine chemical engineering and the like, and has remarkable economic value and social benefit.

The application relates to the technical field of wastewater treatment, and particularly discloses an oil-water separation membrane for biodiesel wastewater and a preparation method thereof. The preparation method of the oil-water separation membrane for biodiesel wastewater comprises the following preparation steps: S1: uniformly mixing expanded graphite and carbon nanotubes, and heating at a constant temperature for 3-6 min to obtain a composite material; S2: in the composite material, dropwise adding methyl methacrylate and N,N'-methylene bisacrylamide to obtain a modified composite material; S3: stirring and dissolving hydroxyethyl cellulose and polyvinyl alcohol in water, then uniformly stirring methyl methacrylate and methacrylic acid butyl ester, and then adding an initiator, the modified composite material, ethyl acetate and water to react to obtain a separation membrane material; and S4: preparing a coating solution containing a certain concentration of the separation membrane material, coating the coating solution on a substrate, and drying to obtain the oil-water separation membrane. The oil-water separation membrane prepared by the application has the advantages of high-efficiency separation of biodiesel wastewater.

A drilling fluid composition is provided herein. The drilling fluid composition comprises biorenewable components, such as a polymerized biorenewable oil and at least one of biodiesel and a nonpolymerized biorenewable oil. The drilling fluid composition is thus more environmentally friendly than conventional, petroleum-based alternatives. Water-based and oil-based drilling fluids comprising the drilling fluid composition are also provided as are methods of lubricating a borehole (e.g., a downhole well) utilizing the drilling fluid composition.

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device in a biodiesel synthesis process, the waste gas treatment device comprises a bottom plate, a gas inlet pipe and an exhaust pipe, a flushing assembly is arranged on the surface of the bottom plate, and the flushing assembly comprises a first sealing box fixedly connected to the upper surface of the bottom plate and a plurality of heat conduction rods arranged in the first sealing box; the upper surface of the first sealing box is fixedly connected with a second sealing box, and the upper surface of the bottom plate is fixedly connected with a circular shell. Waste heat of waste gas is recovered through the heat conduction rod in the gas inlet pipe, water in the first sealing box is heated to generate pressurized water vapor, the pressurized water vapor is stored in the second sealing box, the high-temperature and high-pressure water vapor is used for flushing the wire mesh demister, viscous impurities such as glycerin and polymers can be accurately softened and stripped, and the flushing effect is better than that of common clear water; and meanwhile, waste heat recovery can reduce the temperature of waste gas in the gas inlet pipe, a foundation is laid for a subsequent condensation procedure, extra energy consumption for preparing a flushing heat source is not needed, and the energy-saving and blockage-clearing practicability is achieved.

The invention relates to a kitchen garbage recycling method which comprises the following steps: pretreating kitchen garbage to obtain a kitchen garbage oil phase, a kitchen garbage liquid phase and a kitchen garbage solid phase; placing the eggs on the surface of wheat bran for hatching to obtain larvae; inoculating the larvae on the surface of the kitchen waste solid phase for breeding, and adding solid residues to obtain a solid mixture; and separating the solid mixture to obtain adults and fecula. The kitchen garbage is fed by insects and is converted into various high-value products: the insect protein can replace conventional feeds such as fish meal and soybean meal, so that the pressure of feed resources is relieved; the insect fat can be used for producing biodiesel or cosmetic raw materials; the insect sand is a high-quality organic fertilizer and can effectively improve the soil fertility. And finally, efficient conversion and sustainable cyclic utilization of the kitchen garbage are realized.

The utility model belongs to the technical field of waste heat recovery, and provides a biodiesel waste heat recovery system. The utility model relates to a biodiesel waste heat recovery system, which comprises a connecting group pipe, a liquid inlet pipe and a liquid outlet pipe, one end of the connecting group pipe is communicated with the biodiesel power machine; one end of the plate heat exchanger is communicated with the other end of the connecting group pipe; the plate heat exchanger comprises a mounting rack, a fixed plate, a heat exchange plate and an adjusting plate; the fixing plate is mounted at one end of the mounting rack, and the adjusting plate is mounted on the mounting rack; the plurality of heat exchange plates are respectively mounted on the mounting rack; wherein the mounting rack comprises a fixed rod and a communicating pipe; wherein one end of the fixing rod is fixedly mounted on the fixing plate, and the other end of the fixing rod is detachably mounted on the adjusting plate; and two ends of the communicating pipe are respectively communicated with the liquid inlet pipe and the liquid outlet pipe.