491results about How to "Fully purified" patented technology

The invention relates to a process for preparing 4,4'-dichlorodiphenylsulfone, in particular to a process for preparing 4,4'-dichlorodiphenylsulfone employing a sulfoxide oxidation method. The process comprises the following steps: carrying out friedel-crafts reaction with chlorobenzene and thionyl chloride under the action of a catalyst to obtain the 4,4'-dichlorodiphenylsulfone; dissolving the obtained 4,4'-dichlorodiphenylsulfone with a solvent; adding hydrogen peroxide and carrying out oxidation reaction to obtain a 4,4'-dichlorodiphenylsulfone crude product; carrying out secondary oxidation refining on the obtained 4,4'-dichlorodiphenylsulfone crude product; and finally preparing high-purity 4,4'-dichlorodiphenylsulfone. The purity of the 4,4'-dichlorodiphenylsulfone purified by the refining process is greater than 99.5%; the refining yield is greater than 98.5%; and the process completely meets the synthesis requirements of high-performance polymers.

The invention provides a supercritical steam oxidization test device, which is characterized by comprising a fluid control assembly; the fluid control assembly is connected to a water treatment assembly and a reaction container assembly through a pipeline respectively; the water treatment assembly is connected to the reaction container assembly through a pipeline; the fluid control assembly, the water treatment assembly and the reaction container assembly commonly form a medium circular flow loop; the reaction container assembly is arranged in a heating furnace; temperatures of the heating furnace and the reaction container assembly are controlled by a temperature control system; and the fluid control assembly and the temperature control system are monitored by a data monitoring assembly.The supercritical steam oxidization test device provided by the invention is a test device capable of simulating a high-temperature high-pressure steam environment of a (ultra) supercritical power station boiler and relates to a whole set of technical solution. The device has the advantages of being low in manufacture difficulty, high in economical efficiency, allaround in function, simple and convenient for operation, precise for control, safe and reliable and is applied to being widely popularized and used in laboratories and can satisfy requirements of scientific researches and engineeringtests.

The invention discloses an air purification part, which comprises a filtering unit used for filtering polluted air, a catalyzing and degrading unit capable of generating ozone and carrying out a light-catalyzed reaction so as to catalyze and degrade the filtered air, and an ozone decomposition and purification unit used for purifying the ozone in the catalyzed and degraded air and releasing the purified air. The invention further discloses a device with an air self-purification function. The air purification part and the device fully develop the advantages of the low energy consumption and high degradation rate of vacuum ultraviolet catalysis, fully degrade the polluted air and perform advanced purification on secondary pollutants and unnecessary ozone produced by the polluted air in combination with ozone catalyzing and degrading technology, thereby reducing the damage of the polluted air to the environment and providing a more healthier working environment for workers.

The invention discloses a preparation method of high-quality glycerin monostearate. The method comprises the steps of reacting hydrogenated palm oil and glycerol under strong base catalysis to generate ester, and carrying out four-stage distillation to obtain high-quality glycerin monostearate. The acid value of the product is reduced to below 0.4, the freezing point is raised to 64-66 DEG C, the quality of the product is improved, and the difficulty of the prior art is overcome. Besides, the problems in the prior art that the pipeline is blocked by slag produced in the distillation process, the production efficiency is lowered, the product quality is reduced, the production is discontinuous and the processing efficiency is low resulting from scaling of an evaporating surface and a condensing surface are solved. Glycerol and hydrogenated palm oil can be recycled, so that the cost is low, the yield is high, the product quality is improved, and the whole processing controllability is high. The high-quality glycerin monostearate is suitable for industrial production.

The invention discloses a multifunctional air purifier comprising a purifier main body. A dust collection filter screen is installed on the lower portion of the inner side of the purifier main body. A humidification conveying water pipe connected with the dust collection filter screen is installed on the outer side of the purifier main body and is provided with a humidification water pump. The other end of the humidification conveying water pipe is connected to the bottom of a water tank. A motor support is arranged on the upper side of the dust collection filter screen and in the purifier main body. A double shaft extension motor is installed in the middle of the motor support. A blade is installed at the lower end of a motor shaft of the double shaft extension motor. The motor support is further provided with an electric heating wire. A baffle plate is installed at the upper end of the double shaft extension motor. An air guide cover is further installed between the baffle plate and the motor support. An air purification assembly is installed on the upper side of the baffle plate and in the purifier main body. The multifunctional air purifier is compact in structure and multiple in function, the effects of purification, disinfection, humidification, dehumidification and warm keeping effects can be conducted indoors, and application and popularization are convenient.

The invention discloses a sandwich-type polycrystalline diamond compact and a preparation method thereof and a used binding agent. The binging agent is made through matching of Co powders, Ni powders, TaC powders and B powders according to a certain proportion. The sandwich-type polycrystalline diamond compact comprises two layers of cemented carbide matrixes and a polycrystalline diamond layer arranged between the two layers of cemented carbide matrixes. The polycrystalline diamond layer and diamond powders are matched in a certain proportion through the binding agent, the polycrystalline diamond layer and the substrate are composited with each other through high-temperature high-pressure sintering, and a superhard composite material with three layers of materials is formed. The cemented carbide layers play the role of a protecting layer, the stress state of the compact when the polycrystalline diamond layer is drilled in is improved, and tipping is avoided. The nanocrystalline metal binding agent can facilitate sintering in high temperature and high pressure, so that the boding density between the diamond (D-D bond) is improved, a good sintering promoting function is achieved, forming of a tough sintering body is facilitated, the impact toughness, the wear-resisting performance and the heat-resisting performance of the sandwich-type polycrystalline diamond compact are increased, and the technological difficulty of high-wearing feature and high impact toughness of the polycrystalline compact is overcome.

The invention discloses a high-temperature dust-removing and coke-removing integrated purifying process of biomass crude gas and provides a new process for high-efficiency purification of biomass high-temperature gas at low cost. The process comprises a high-temperature gas heat exchanger (A), a high-temperature gas purifier (B), a Venturi pulse back-blowing system (C), a gas preheater (D) and an electric-heating insulation system (E), wherein the five sets of equipment operate cooperatively to form a set of complete high-temperature gas purifying integrated device; a filtering medium in the high-temperature gas purifier is a modified ceramic membrane dust-removing pipe. When filtering cakes on the outer surface of the modified dust-removing pipe are deposited to certain thickness, deposited ash can be back-blown into an ash discharging hopper box for collection by the Venturi pulse back-blowing system. The high-temperature dust-removing and coke-removing integrated purifying process disclosed by the invention has the advantages that high-efficiency separation and integrated treatment of ash and coke components in biomass gas are realized; the dust-removing temperature is low so as to be beneficial to reducing the manufacturing cost of the equipment and prolonging the service life; biomass ash side products with commercial value are produced while the high-efficiency purification of the biomass crude gas is realized; the process flow is simple and flexible, the operation is simple, the purification cost is low and the suitability for industrial production is achieved.

The invention provides an electrochemical polishing device for the inner surface of a long and thin pipeline and belongs to the field of precise non-traditional machining. The structure of the electrochemical polishing device comprises a control terminal module, a power supply system, a monitoring module and a processing main body, wherein the control terminal module has a function of displaying each current environmental parameter of the device; a monitoring system comprises the monitoring module for monitoring each environmental parameter. The electrochemical polishing device disclosed by the invention adopts a tool electrode with a spiral slot structure; during polishing, the tool electrode performs axial linear reciprocating movement and rotary motion to realize full controllable perturbation of a fluid inside the pipeline and take away air bubbles and processing precipitates generated during processing, so that electrolytic reaction on the inner surface of the long and thin pipeline is performed uniformly; a vacuum pump is used for sucking out electrolyte from the bottom end of the pipeline so as to prevent ejection of the electrolyte during processing; the electrolyte is fully purified by an electrolyte circulating filtration system, so the service life of the electrolyte is prolonged; the temperature of the electrolyte can be regulated and controlled in real time by an electrolyte heating system, so that the polishing effect is improved.

The invention discloses a household air purifying device. The household air purifying device comprises a frame body, an air inlet device, a rotary device, an air outlet tube, a first filter device, a second filter device and a water inlet tube, wherein a first through hole, a second through hole, a first filter screen and a sealing ring are arranged on the frame body; the air inlet device comprises the air inlet tube, an air blower and an air valve; the rotary device comprises a bracket, a motor, a rotary shaft, a rotary block, a filter ring, a first filter board and a second filter board; the first filter device comprises a body, a sealing block, a second filter screen and a third filter screen; the second filter device comprises an inclined plate, a filter vertical plate and a connecting plate; a fixing block which is horizontally arranged is arranged on the water inlet tube; the right surface of the fixing block is fixedly connected with the inner surface of the frame body; the left end of the fixing block is fixedly connected with the water inlet tube. The household air purifying device can be used for sufficiently purifying air in a room, is good in purifying effect, high in purifying efficiency and capable of quickly purifying air in the room, so that excessive polluted air is prevented from being absorbed, and the body health of a family is protected.

The invention relates to the field of cereal drying, and in particular relates to a cereal drying machine. The cereal drying machine comprises a drying tower (1) and a heat pump (2) which is communicated with the drying tower (1) and is used for providing hot air for the drying tower, wherein the heat pump (2) comprises a pump shell (3) and an evaporator (4) arranged in the pump shell; the cereal drying machine is characterized by further comprising a dust collection room (5) which is communicated with the drying tower (1) and is used for collecting waste air discharged by the drying tower; and a defrosting heating device is arranged on the evaporator (4). The cereal drying machine can efficiently filter the discharged waste air, and the phenomenon that cold air is generated at an air outlet where the evaporator is positioned during defrosting of the evaporator is avoided.

The invention relates to a wastewater treatment method, in particular to a pretreatment method for epoxy resin desalinization wastewater. The pretreatment method comprises the following steps of: storing desalinization wastewater in a wastewater storage tank, naturally settling for 1 day to precipitate epoxy resin with larger particle size, discharging epoxy resin precipitate at the bottom of the wastewater storage tank, pumping supernatant to a reaction kettle, adjusting the pH value to 11-13, heating, stirring for 1-3h while maintaining the temperature at 70-120 DEG C, introducing steam for at least 30min, condensing and recovering volatile gas with a condenser, pumping reaction liquid to a settling tank, carrying out plate-frame pressure filtration to remove gelatinized epoxy resin, and pumping filtrate to a multi-effect evaporator for concentration by evaporation. By adopting the process provided by the invention, epoxy resin, epoxy chloropropane, methyl isobutyl ketone and other impurities in the desalinization wastewater are effectively removed, the wastewater is sufficiently purified before entering the multi-effect evaporator, and the problems that the multi-effect evaporator pipeline is easy to block and the distilled water is high in COD (Chemical Oxygen Demand) are solved.

The invention discloses a tea oil filtering device and relates to the technical field of filtering equipment. The tea oil filtering device comprises a filtering barrel; the filtering barrel comprises an oil feeding pipe, an oil discharging pipe, a first filtering hopper and a second filtering hopper; the first filtering hopper has a conical structure with an opening at bottom; the first filtering hopper and the second filtering hopper both have netted structures; an oil residue box is moveably arranged at the bottom of the second filtering hopper. Three-layer filtering operation is arranged for the tea oil filtering device, so that tea oil is fully purified and filtered; with a backflow mechanism, the filtering efficiency is high; the practicability and the flexibility are high.

It is an object of the present invention to provide a method for isolating biopolymers, which is capable of simultaneously isolating many types of biopolymers from a single biological sample under the same conditions. The present invention provides a method for isolating biopolymers, which comprises repeating at least twice a process consisting of: (1) a step of preparing at least two vessels each containing a carrier retaining a substance having an affinity for a target biopolymer; then simultaneously introducing a single sample solution containing the target biopolymer into at least the two vessels, and then allowing said sample solution to come into contact with said carrier, so that the target biopolymer can be adsorbed on said carrier; (2) a step of discharging said sample solution from said vessels; and (3) a step of stirring the discharged sample solution.

The invention discloses a composite culturing device and method suitable for an urban household.The culturing device comprises a fishpond and a soilless cultivation plantation bed located above the fishpond; an inclined plane and a containing cavity are formed in the fishpond, and a connecting pipe, a pump, an output pipe and a water return pipe are connected between the containing cavity and the soilless cultivation plantation bed; an overflow opening is formed in the upper edge of the soilless cultivation plantation bed, and the inner diameter of the water return pipe is smaller than that of the output pipe; cover plates are arranged on the soilless cultivation plantation bed in a covering mode; solar panels are arranged on the cover plates, the outer surface of the fishpond and the outer surface of the soilless cultivation plantation bed, the solar panels are connected with an accumulator, and the accumulator is connected to the pump through a controller.The culturing method comprises the steps that water in the fishpond is pumped into the soilless cultivation plantation bed through the pump, and water is purified in the soilless cultivation plantation bed and flows back into the fishpond.According to the composite culturing device and method suitable for the urban household, residual bait and excrement of aquatic animals are decomposed through water circulation and microorganisms, nutrient is provided for plants, and the water flowing back into the fishpond is purified through plant root systems and the action of the microorganisms.

The invention discloses a device system for purifying by utilizing a gas separation membrane. The device system comprises a mixing device, a pretreatment unit and three gas separation membrane units, wherein two ends of the mixing device are respectively communicated with a raw material gas and the pretreatment unit; a gas passes through the pretreatment unit and enters a gas inlet of the first gas separation membrane unit; an impermeable gas of the first gas separation membrane unit is communicated with a gas inlet of the second separation membrane unit; impermeable gases of the first and second gas separation membrane units pass through a mixed flow tank, and are communicated with a gas inlet of the third separation membrane unit; an impermeable gas outlet of the third separation membrane unit is provided with a backpressure control valve, and is communicated with a gas inlet of the mixing device for cyclic purification; the impermeable gas of the second separation membrane unit is a tail gas; the permeable gas of the third separation membrane unit is a product gas. According to the invention, three membrane units are used for purifying independently so as to completely purify gases, such as helium, hydrogen, carbon dioxide, and the recycling rate is relatively high; the device system is simple and compact in structure, and is applied to industrial production.

The present invention discloses an acid waste gas recycling and purification device. The device mainly includes a gas collecting hood, a fan, a condensate recycling bin, an absorption and purification tower, a circulating spray pump and a gas pipeline. The gas collecting hood, the fan, the condensate recycling bin and the absorption and purification tower are connected successively by the gas pipeline. A liquid collecting hopper and an acid liquid discharge orifice tube are arranged at the bottom of the condensate recycling bin. A liquid storage tank is arranged at the bottom of the absorption and purification tower. A dosing orifice is arranged on the liquid storage tank. A plurality of spray devices are arranged at the middle part of the absorption and purification tower, filling layers are arranged under each of the spray device and the filling layers are activated carbon fiber layers or granular activated carbon layers. The spray device and the circulating spray pump are connected and another end of the circulating spray pump is connected to the liquid storage tank. A demister is arranged at the uppermost part within the absorption and purification tower, and an air outlet is arranged at the top end of the absorption and purification tower and is connected to a chimney. The acid waste gas recycling and purification device is capable of recycling and using acid mist, good in purification effect, stable in performance, low in power consumption, easy in maintenance and easy in operation.

The invention discloses a gas-solid-liquid separation and purification system for agricultural and forestry biomass material gasified gas. The gas-solid-liquid separation and purification system comprises four parts of a dry dedusting system, a wet washing system, a condensation separation system and a purification and dehumidification system. The dry dedusting system comprises a gas feeding pipe, a cyclone separator and a gravity check valve. The wet washing system comprises a spray tower, a washing tower, a cooling circulation tank matched with the washing tower, a mesh belt-type slag remover and an in-line pump. The condensation separation system comprises a tubular screw-type condenser, a cooling tower, a water tank and an in-line pump. The purification and dehumidification system comprises a wire gauze filter, a blower fan and a purification tower. The gas-solid-liquid separation and purification system is scientific and reasonable, utilizes the tubular screw-type condenser to replace a coil tube-type condenser, a return tube-type or a needle tube-type condenser, and is convenient for use and maintenance. Through the gas-solid-liquid separation and purification system, gas produced by biomass pyrolysis can be fully separated and purified thereby reaching requirements on gas for an internal combustion engine and on gas feeding of an internal combustion engine, and continuous and stable gas feeding is formed.

The invention discloses an air purifier with a cleaning function. The air purifier comprises a frame body, a pulling device, a filtering device, a cleaning device, a humidifying device and a material collecting box, wherein the frame body is provided with first through holes, second through holes, supporting blocks and universal wheels; the pulling device comprises a fixed block, a first connecting rod, a second connecting rod, a holding rod, a spring and a positioning block; the filtering device comprises a supporting plate, a supporting column, an outer filter screen, an inner filter screen, a fan, an upper filter screen and a partition plate; the cleaning device comprises cylinders, pushing rods, pushing blocks and cleaning rings; the humidifying device comprises a fixed ring and a sponge cushion; the material collecting box is annular and is positioned inside the frame body; the lower surface of the supporting plate is propped against the upper surface of the material collecting box; the upper end of each pushing rod is connected with the corresponding cylinder. According to the air purifier, dust on the filter screens can be cleaned, so that the purification effect of the air purifier can be maintained for a long time, and the service life of the air purifier is prolonged.

The invention discloses an environmental-friendly dust collecting room for a grain drier, which comprises a box body (1), wherein a filter screen group used for dividing an inner cavity of the box body (1) into an upper chamber (1.1) and a lower chamber (1.2) is set inside the box body (1); the lower chamber (1.2) is provided with an inlet (1.3); the upper chamber (1.1) is provided with an outlet (1.4) used for the discharged waste gas inside the lower chamber after the waste gas passes through the filter screen group; and the environmental-friendly dust collecting room for the grain drier is characterized in that the filter screen group comprises an initially filtering filter screen and a top-layer filter mechanism (5) set above the initially filtering filter screen. The invention provides an environmental-friendly dust collecting room for a grain drier that is capable of filtering waste gas discharged from the grain drier with high efficiency to eliminate dust particles and impurities in the waste gas.

The invention discloses an LED ultraviolet self-disinfection mask. The mask comprises a mask body covering the outer side of the mouth and the nose of a human body, and a fixing part connected with the left side and the right side of the mask body. The mask body comprises a filter body and a shell on the periphery of the filter body. The filter body comprises an annular support, an annular lamp panel is arranged on the inner wall of the support, a deep ultraviolet LED is arranged on the lamp panel, and a nano photocatalytic filter screen is fixed to the inner side of the support. An air inletand outlet is formed in the front side of the shell, a main board is arranged in the shell, the main board is electrically connected with the lamp panel, and the shell protrudes forwards so that a cavity can be defined by the shell, the nano photocatalytic filter screen and the human face. Bacteria are killed through photocatalysis of the deep ultraviolet LED, filtration and sterilization are conducted through the silver ion filter screen, and adsorption and sterilization are conducted through activated carbon, so that viruses are killed more thoroughly, air entering a human body and air exhaled by the human body can be fully purified, air flowing in two directions is disinfected air, and cross infection of respiratory diseases is avoided.

The invention discloses an air conditioner with an air purification device, wherein the periphery of an air inlet of the air conditioner is movably connected with the air purification device, and the air purification device can selectively block the air inlet. The air conditioner is to integrate the prior air conditioner and an air purifier into a whole, and the air purification device is separated from the air inlet when the temperature and the humidity of indoor air need to be adjusted, thereby ensuring adequate air intake; when the cleanliness of the indoor air needs to be adjusted, the air purification device covers and blocks the air inlet, and can completely and effectively purify the indoor air due to the fact that the temperature and the humidity do not need to be adjusted at this time.

The invention discloses a device and method for purifying poisonous and harmful organic pollutants by using an electromagnetic collaborative enhanced biological packed tower, and belongs to the field of pollution control of difficultly treated high-concentration poisonous and harmful organic pollutants. The method for treating the poisonous and harmful organic pollutants, which is disclosed by the invention comprises the steps: domestication of a bactericide; preparation of reactor packing; biofilm formation of reactor packing; and treatment of poisonous and harmful organic pollutants. According to the method disclosed by the invention, the defect that the degradation efficiency is affected by concentrated falling easily caused by aging when the biofilm process runs are overcome by utilizing an electromagnetic collaborative technology; the bactericide with a rapid growth rate and high degradation efficiency of poisonous and harmful organic pollutants is cultured; meanwhile, the content of dissolved oxygen in a reactor system is improved, so that the mass transfer rate of matter in gas and liquid phases is enhanced, and thus the degradation reaction probability of the poisonous and harmful organic pollutants is increased, and the organic matter is fully purified.

The invention discloses a flue gas purifying system and a method. The system comprises a feed bin, a reaction tower and a deduster, wherein, the feed bin is used for transporting the garbage to a garbage incinerator when the garbage amount meets the primary combustion amount of the garbage incinerator; the reaction tower is connected with the garbage incinerator by a pipeline to be used for the flue gas to react with the lime slurry ejected from a rotary sprayer; the deduster is connected with the reaction tower by the pipeline to be used for dedusting of the flue gas treated by the reaction tower. The system of the invention is high in safety, simple in operation, high in purification efficiency and durable in use.

The invention discloses an indoor ventilation and air purifying circulating system. The system is characterized in that an air purifier and an air cylinder are controlled by a controller to externallydischarge air flow for a certain period of time every time when the system is started to conveniently blow dust in the air purifier and air cylinder outdoors, dust in the equipment is prevented fromentering indoors, indoor air quality is improved, and the problem that dust enters indoors is relieved. When air is discharged outwards, blades can be driven to rotate by the air flow, dust shaking balls at the ends of the blades can be touched to allow internal filter nets to shake and deform to achieve the dust removing on inner layer filter nets, dust on the inner layer filter nets can be effectively removed to improve the dust removing effect of the equipment and prevent dust from attaching to the filter nets, when the air flow is controlled to internally discharged by the controller, rotation preventing elastic nets can be prevented from bending in the direction towards the blades by the air flow, the shielding of the blades is achieved, the rotation of the blades is prevented, the dust on the filter nets can be prevented from being shaken indoors when the air flow is circulated indoors, and therefore the ventilation purifying effect is ensured.

The invention relates to an anaerobic reactor for treating waste water containing emulsified liquid. The height-diameter ratio of a tank body is greater than 3; an inlet water distributor is arranged at the bottom part of the tank body; the anaerobic reactor is provided with a granular sludge region which is suspended at the lower part of the tank body and a floccus sludge region which is suspended at the upper part of the granular sludge region; the surface loading of a deposit chamber of a triphase separator is not higher than 0.5m<3> / m<2>.h; and an outer circulating system is adopted. Because of the coexistence of the granular sludge region and the floccus sludge region of the anaerobic reactor, the COD (chemical oxygen demand) removal rate of the waste water containing the emulsified liquid is improved to more than 60%, the subsequent waste water processing technology pressure is reduced, the total effluent quality of a whole waste water treating system can reach the standard, and the operation cost of the whole waste water treating system is lowered.

The invention discloses a gravity type air scrubbing filter pool which comprises a pool body (1), a clean water storehouse (2) and a filter bin (3), wherein an overflow opening (4) is formed in the clean water storehouse (2); the filter bin (3) is connected with an external raw water pool through a water feeding pipe (5); a filter layer (6) is arranged at the lower part of the filter bin (3) and is arranged on a multihole filter plate (7); an aeration coil pipe (8) is arranged on the lower side of the multihole filter plate (7) and is connected with an external air source through a compressed air interface (9) in the pool body (1); a communicating pipe (10) for communicating the clean water storehouse (2) and the filter bin (3) is arranged on the pool body (1); and a lower interface of the communicating pipe (10) is positioned on the pool body (1) on the lower side of the multihole filter plate (7). By combining air-water bottom-to-top backwashing and water top-to-bottom well washing, the gravity type air scrubbing filter pool is good in cleaning effect and low in production cost, improves the production efficiency and is suitable for popularization and use.

The invention relates to a vertical axis self-dumping separator provided with a drum (1) in which a disk stack (3) consisting of several discs (4) is arranged, wherein a product to be centrifuged is introducible through a supply pipe (6) and a distributor (7) in a centrifugal chamber (2) which is surrounded by the drum (1), at least two or several ribs (17) are provided in a solid matter chamber (15) disposed outside of the disc stack and a gap between the ribs (17) and the internal wall of the drum (1) is equal to or greater three millimetres.

The invention relates to a method for purifying a diamond or cubic boron nitride abrasive. The method comprises the following steps: adding sodium hydroxide and potassium hydroxide to diamond or cubic boron nitride containing pyrophyllite silicate, hexagonal boron nitride and silicon oxide; stirring the sodium hydroxide and the potassium hydroxide as well as the diamond or cubic boron nitride for reaction; controlling an internal temperature at 130-150 DEG C and controlling an external temperature range at 240-250 DEG C; 2-4 hours later, closing a heating system; and discharging a product through a discharging product. Through the adoption of the method provided by the invention, product quality is absolutely guaranteed; in addition, uniformity is kept in stirring; a fact that purity reaches reaches requirements of purifying reaction consistency is guaranteed; impurities and incomplete reaction phenomenon are avoided; the sodium hydroxide and the potassium hydroxide are saved by 70 % according to process statistics; the comprehensive cost is reduced by 50 %; and very good promotion and application values are obtained.