31results about How to "Ease of Disposal" patented technology

The invention relates to a rinsing air purification technology and in particular relates to a cold-hot type rinsing air purification device using a multilayer staggered spray mode. The cold-hot type rinsing air purification device using the multilayer staggered spray method comprises a water storage tank, a spray tank, a water supply pipe, a water pump and an exhaust fan, wherein the water storage tank comprises a wastewater storage tank, a clear water storage tank, an electronic refrigerator, an electronic heater, an isolation plate and a wastewater filtration screen; the spray tank comprises a spray tank shell, a spray plate, a spray pipe, an air inlet, an air outlet and an air filtration screen; the spray plate, the spray pipe, the air inlet, the air outlet and the air filtration screen are arranged in a tank body; due to the adoption of the multilayer staggered spray method and a curve air flowing path, an equipment resource can be used to the greatest extent; air is fully sprayed and washed, so that the best purification effect can be achieved; the temperature of the air in a room can be adjusted according to the requirement during purifying of the air; the device can be used as an indoor moving air purifier, can be mounted on the wall to be used as an air purification window, and can be applied to spray purification towers for purifying industrial waste gas generated during waste incineration; the defects that a filter element is blocked and parts are frequently replaced can be avoided.

A method of manufacturing a polarizer is provided that makes it possible to virtually simultaneously perform a contact of a hydrophilic polymer film with liquid and stretch of the hydrophilic polymer film in a width direction by a tenter method, or the like, using a small and simple manufacturing equipment. A method of manufacturing a polarizer includes a width direction stretching process for stretching a hydrophilic polymer film 1 in the width direction, which is continuously supplied, by gripping both ends in a width direction thereof with grip means 2 and moving the grip means 2 in a longitudinal direction of the film 1 as well as by bringing the film 1 into contact with liquid and also moving the grip means 2, which grips at least one of both ends in the width direction of the film 1, outwardly in the width direction of the film 1; and a dyeing process for dyeing the film 1 by a dichroic material. In the width direction stretching process, a contact with the liquid is carried out by at least one of spraying and coating of the liquid, and the width direction stretching process is carried out in at least one of the dyeing process and a process other than the dyeing process.

The invention discloses novel environment-friendly water-washable ink and a preparation method thereof. The ink is prepared from, by weight, 20%-60% of water-soluble resin, 10%-50% of acrylic copolymer resin emulsion, 10%-15% of titanium dioxide, 0.5%-1.5% of a dispersing agent, 0%-0.5% of an antifoaming agent, 0.1%-1.5% of a wetting agent, 0.1%-1% of silicon dioxide, 5%-18% of an alcohol-water mixed solvent and 0.1%-1% of an amination reagent. The water-soluble resin is one or two of water-soluble acrylic resin and waterborne polyurethane. The water-soluble resin, the acrylic copolymer resinemulsion and the amination reagent are mixed to be uniform, then the alcohol-water mixed solvent is added, then the dispersing agent and silicon dioxide are added, the mixture is continuously stirred,titanium dioxide is added, the materials are mixed to be uniform, then filtering is carried out, the wetting agent is added to filtrate, ammonium hydroxide is added for adjusting the pH value, and the novel environment-friendly water-washable ink is obtained. The environment-friendly water-washable ink is low in cost and excellent in printing performance and environment-friendly performance, andthe preparation method is simple and easy to use and popularize.

The invention relates to a dry sludge receiving and conveying process and a sludge drying system thereof. The sludge drying system comprises a disc dryer and a condenser, wherein steam inlets are formed in the two sides of the outer wall of the disc dryer, a sludge outlet is formed in one side of the outer wall of the disc dryer, a steam condensation outlet is formed in one side of the outer wall of each steam inlet, and a driving motor is arranged on one side of the outer wall of the disc dryer. Compared with the prior art, the process and the system have the following beneficial effects that sludge and sewage are separated in the disc dryer to dry the sludge so as to conveniently discharge the sludge, and the sewage is separated and enters the cyclone separator firstly, so that wastewater, dust and waste gas are separated respectively; and particle impurities in the sewage are removed, the sewage with dust filtered out is conveyed into the condenser, waste gas in the sewage is volatilized and connected to the incineration fan to be utilized and treated, and the rest of the sewage is output from the lower end to be subjected to stage treatment.

The invention discloses a curing device for processing carbon fiber products. The curing device comprises a sealing ring, a cover, a hinge, a curing tank, an iron curing liner, a cooling pipe, a cooling liquid pipe joint, a heater, a wind guide cover, a fan, a control panel, a supporting base, a carbon fiber product curing processing taking-placement removal rack structure, a wastewater discharging anti-pollution treatment cylinder structure and a curing air exhaust protection pressure relief pipe structure. The sealing ring is hinged to the periphery of the inner wall of the cover. The coveris installed on the left end of the curing tank through the hinge. According to the curing device, by arranging mobile wheels, a U-shaped wheel base, a removal rack, a hollowed-out supporting plate, acarbon fiber product placement plate, a removal handle and adsorption blocks, the cured carbon fiber products are conveniently taken, placed and removed out, and convenience is provided for operation. By arranging adsorption balls, a connection pipe, a cleaning cover, a wastewater treatment cylinder, an anti-pollution adsorption core and a mechanical valve, the cooled wastewater is conveniently discharged and can be adsorbed, and thus environmental pollution is avoided.

The invention relates to the technical field of industrial waste gas treatment, in particular to environment-friendly industrial waste gas treatment equipment. The equipment comprises a bottom plate; a box, a tank and a plasma purifier are fixedly mounted at the top of the bottom plate; an air suction pipe is fixedly mounted on the left side of the box; a first valve is fixedly mounted on the surface of the air suction pipe; an activated carbon plate is arranged in the box; and placing grooves are formed in the two sides of the top of the box, and limiting rods are arranged in the placing grooves. The environment-friendly industrial waste gas treatment equipment has the advantages that discharged waste gas can be in full contact with liquid, the activated carbon adsorption plate in the equipment can be replaced, and the waste gas treatment efficiency is improved, and the problem that when existing waste gas treatment equipment is used, discharged waste gas is not in sufficient contact with liquid, and an activated carbon adsorption plate in the equipment is inconvenient to replace after the equipment is used for a period of time, so that the waste gas treatment efficiency is reduced is solved.

This invention will provide the consumer with a sanitary and effective means of preparing. This invention also makes it easy to discard and clean-up the by-products associated with the preparation of such foods through its waste disposal enclosure bags. The Disposable Cutting Board has a sturdy-base surface designed to work on a flat surface of the same size or larger and / or in conjunction with a preexisting cutting board. The sturdy base surface is structured to withstand the cutting, slicing, dicing and other means necessary in the preparation of and serving of food products. The Disposable Cutting Board has a leak resistant waste disposal enclosure bag, which secures the disposable cutting board for easy one step clean-up- just close the fastener, for discard of-the by-products together with the Disposable Cutting Board.

The invention provides a method and a device for eliminating an interference signal in an SAR image. The method comprises the following steps: converting an SAR complex data image into a distance frequency domain image; performing interference detection on the distance frequency domain image, and dividing the distance frequency domain image according to an interference detection result to obtain afirst sub-image containing interference information and a second sub-image not containing interference information; performing difference operation on the first sub-image and the second sub-image toobtain a third image only containing interference information; carrying out change detection processing on the first sub-image and the second sub-image to obtain an interference change image, carryingout denoising processing to obtain a fourth image of an interference position binary image, and carrying out matching processing on the third image and the fourth image to obtain a fifth image only containing interference information and positions; and obtaining an SAR image after interference removal based on the SAR complex data image and the fifth image. Through the method for eliminating theinterference signal, a high-precision SAR image with high process signal fidelity for eliminating the interference signal can be obtained.

The invention discloses a fecal incontinence drainage control device. The device comprises a cannula, a first air bag cavity, an inflation control structure, a control valve structure and an air inletstructure, wherein a top end of the cannula is provided with a fecal inlet, an outer surface of an upper end of the cannula is provided with a side hole, the first air bag cavity is fixedly arrangedoutside the cannula, a second air bag cavity is arranged above the first air bag cavity, and the control valve structure is arranged inside a tail end of the cannula, the tail end of the cannula is connected with a nut, a tail end of a drainage bag is connected with a defecation tube, and an outer surface of the defecation tube is sleeved with a defecation control structure. The device can be clamped in anus of a patient through the expansion of the first air bag cavity and the second air bag cavity, so that the device can be stably installed in the anus of the patient, discomfort of the patient caused by a fact that long foreign matters are inserted into rectum of the patient can be avoided, and comfort of the patient in use can be improved through the expansion and clamping of the air bag structure.

The invention relates to an extrusion device capable of removing waste for producing hollow bricks. The device comprises a base, a containing cavity is formed above the base, a working table is arranged at the upper end of the containing cavity, a waste removing groove is formed in the center of the working table, a waste tank is arranged right below the waste removing groove, supporting columns are arranged at the four corners of the working table, a bottom plate is arranged above the center of the working table, a top plate is fixed at the top ends of the supporting columns, first telescopicrods are fixed on the two sides of the bottom plate, a second hydraulic cylinder is arranged at the end of the first telescopic rod on the right side, an extrusion female die is arranged right abovethe bottom plate, supporting rods are arranged on the two sides of the extrusion female die, a connecting piece is arranged at the ends of the supporting rods, a second telescopic rod is connected tothe connecting piece in the vertical direction, an extrusion male die corresponding to the extrusion female die is arranged on the top plate, and the extrusion male die is connected to the top plate through a first hydraulic telescopic rod. The device has the advantages of being simple in structure, convenient and rapid in waste removing, convenient to operate and high in practicability.

The invention discloses a porous fiber material carrier and a preparation method thereof. A fiber material is put in water for cleaning and then is put in ethyl alcohol for soaking, then thorough flushing is performed with ethyl alcohol, the fiber material is dried, smashed and mixed and then is added into a 3D printer for heating and melting, a carrier digital model file is used as a basis, a 3D printing technology is applied to prepare the carrier in a layer-by-layer printing mode. The invention also discloses application of an anaerobic expanded granular sludge bed added with the porous fiber material carrier in treatment of ethyl alcohol waste water. The reactor operation is stable in the starting process of a reactor, the problem of sudden acidification does not occur, the starting time is obviously shortened, the sludge amount in effluent is obviously decreased, the effluent is approximately clarified, and accordingly later discharge treatment is promoted.

The invention provides a surface degreaser of an engine noise elimination assembly and a preparation method of the surface degreaser. The surface degreaser comprises 15-17 parts of sodium dodecyl benzene sulfonate, 17-19 parts of sodium ethoxylated alkyl sulfate, 15-16 parts of nonyl phenol alkylphenol polyoxyethylene, 16-18 parts of cocoanut fatty acid diethanolamide, 14-15 parts of rhamnolipid,14-15 parts of alkyl glycoside, 16-18 parts of zinc vitriol, 18-22 parts of sodium tripolysilicate, 17-20 parts of sodium citrate, 16-18 parts of tributyl citrate, 14-15 parts of benzotriazole, 15-16parts of polydimethylsiloxane and 14-15 parts of polyaspartic acid. By means of a surfactant included in the surface degreaser, the emulsification function is enhanced, the surface tension can be reduced, permeability can be enhanced, the cleaning effect to the noise elimination assembly can be improved, the surface of the noise elimination assembly is not damage during cleaning, and surface smoothness can be enhanced.

The invention discloses a non-phosphorus environment-friendly metal degreasing agent, comprising 30%-50% of a degreasing agent, 0.5%-1.5% of a defoaming agent, 1%-10% of a foaming agent, 1%-5% of a surface active agent and the balance of a complexing agent. The invention also discloses a production method of the non-phosphorus environment-friendly metal degreasing agent; and the method comprises steps of: evenly mixing the degreasing agent, the defoaming agent and the complexing agent, then adding the foaming agent and the surface active agent, and stirring until a completely uniform state to obtain the powdery non-phosphate environment-friendly metal degreasing agent. The invention also discloses a usage method of the non-phosphorus environment-friendly metal degreasing agent; and the usage method comprises the following steps: preparing a lotion; adding the metal to be washed into a washing trough, and washing the metal; and washing the metal with clear water. The metal degreasing agent provided by the invention has good cleaning effect on oil on surface of black metal, little corrosiveness, and insusceptibility to corrosion; the waste cleaning agent is convenient for treatment and beneficial to environmental protection; and the preparation process is simple and at low cost.

The invention provides a multifunctional polyurethane reaction kettle condensation recovery device which comprises a reaction kettle body, a gas phase outlet pipe, an alcohol-water separator, a connecting pipe head, a gas guide pipe, a condenser, a condensate water guide pipe, a flow guide pipe, a butt joint and a buffer tank, and the upper outlet of the reaction kettle body is in threaded connection with the gas phase outlet pipe; and the upper end of the gas phase outlet pipe is in threaded connection with the alcohol-water separator. The arrangement of the gas phase valve, the antifouling adsorption box, the adsorption net, the exhaust fan, the dismounting cover, the exhaust pipe and the impurity filtering net is beneficial to exhaust treatment of waste gas, environmental pollution is avoided, gas in the reaction kettle body is exhausted by opening the gas phase valve, and deep adsorption and filtration are performed through the adsorption net in the antifouling adsorption box, thegas can be discharged after being filtered by the impurity filtering net in the exhaust pipe; the exhaust efficiency can be improved through the exhaust fan, the exhaust effect is guaranteed, cleaningcan be conducted by taking down the dismounting cover and the exhaust pipe, and maintenance is convenient.

The invention discloses an enameled flat wire production method. A vertical modular production line is employed for producing an enameled felt wire. The vertical modular production line is arranged on an enameled flat wire production line. The vertical modular production line comprises a line laying device, a cleaning air drying device, a paint coating device, a catalytic device, a baking device, a strength intensifying device and a take-up device. The line laying device is connected with the paint coating device through the cleaning air drying device, the rear side of the paint coating device is provided with the catalytic device and the baking device which are mutually independent, and the rear side of the catalytic device and the rear side of the baking device are connected with the take-up device through the strength intensifying device. According to the invention, different modules are combined for producing the enameled flat wire according to different insulation paints, coating modes and strength requirements. The enameled flat wire production method employs modular combination, reasonably segments each process, realizes fictionalization, carries out cordwood system matching, and realizes production of different enameled flat wires.

The invention relates to the technical field of food waste treatment, and discloses a food production waste treatment device which comprises a treatment bin, a supporting seat is fixedly mounted on the outer surface of the treatment bin, and a base plate is fixedly mounted at the bottom of the supporting seat. According to the garbage treatment device for food production, cutter teeth are arranged on the outer surfaces of stirring blades, when a motor is started, a power rod works to enable the stirring blades to rotate, the cutter teeth crush garbage in a treatment bin, and the situation that large garbage is inconvenient to discharge and treat is avoided; and the waste water can be discharged, the situation that a large amount of dirty water remains in the treatment bin to damage the power rod is avoided, by arranging a filter plate, waste with the crushing size reaching the standard can be filtered, the remaining waste continues to be crushed till the waste can pass through the filter plate, and the waste reaching the standard is discharged through a discharging pipe.

The invention relates to the technical field of smelting flue gas treatment, and further discloses a quenching collection and treatment system based on smelting flue gas. The system comprises a filterbox, a treatment box and an alkali liquor storage pool, the top end of the filter box is fixedly connected with a connecting box; a first mounting block is arranged in the connecting box; two first rotating rods are rotationally connected into the first mounting block through a rotating shaft; one end of each of the two first rotating rods is rotatably connected with a second rotating rod, a hydraulic cylinder is fixedly installed on the side wall of the connecting box, the output end of the hydraulic cylinder is fixedly connected with a fixing piece, and a rotating shaft between the first rotating rods and the second rotating rods is fixedly connected into the fixing piece. According to the quenching collection and treatment system based on the smelting flue gas, dust in the flue gas canbe continuously filtered, the filtering strength of a filtering net can be guaranteed while the filtering efficiency is guaranteed, atomization is more uniform, the concentration is enough to absorbsulfur dioxide, and the flue gas can be well cooled.

The invention relates to the technical field of power distribution network engineering, and discloses a power distribution network engineering cost compilation and audit application system which comprises an engineering cost system, the output end of the engineering cost system is electrically connected with the input end of a processor, and the output end of the output end of the processor is electrically connected with the input end of a display terminal. The project cost system internally comprises an article classification module, a quantity statistics module, a unit price statistics module, a total price summation module and other fee statistics modules. And the output ends of the article classification module, the quantity statistics module, the unit price statistics module, the total price summation module and the other fee statistics module are electrically connected with the input ends of different data arrangement modules. According to the application system, poorer data canbe sorted out, and external personnel can conveniently eliminate and process larger difference values, so that the auditing work of the data is effectively completed, the disorder of the data is effectively avoided, and the data can be conveniently distinguished and processed.

A power plant for generating electrical energy comprising: - means for generating electrical energy from fossil fuels, biomass or biogas, - means for extracting and storing carbon dioxide from flue gases produced in the power plant, characterized in consisting in - an electrolysis plant for converting stored carbon dioxide into other substances, - a control device for controlling the electrolysis plant, said control device being designed such that said control device obtains current electricity price data and, when the electricity price falls below When the electricity price threshold is reached, the electrolysis equipment is operated, and when the electricity price exceeds the electricity price threshold, the electrolysis equipment is turned off.

The invention provides intelligent sewage treatment comprehensive equipment which comprises a sewage treatment box, supporting legs, a drain valve, an intelligent control screen, a connecting pipe, achemical feeding hopper, a box cover, a stirring motor, a stirring shaft and an auger, and the supporting legs are longitudinally connected to the four corners of the bottom of the sewage treatment box through bolts; and the drain valve is in threaded connection with an outlet in the middle of the bottom of the sewage treatment box. By arranging a water inlet, a protective cover, a water inlet hopper, a connecting seat with a counter bore, a lifting rod and a plastic sundry filtering net bag, filtering of plastic sundry is facilitated, pipeline blockage is avoided, the treatment effect is guaranteed, and when sewage enters the protective cover through the water inlet, the sewage is guided in through the water inlet hopper, impurities such as plastic sundry or other impurities can be filtered out through the plastic sundry filtering net bag, complete treatment is ensured; and during cleaning, the lifting rod and the plastic sundry filtering net bag can be lifted out by taking down the protective cover, cleaning or replacement can be conducted, and operation is convenient.

The invention discloses a sewer sludge cleaning device. The sewer sludge cleaning device comprises a tank. A lifting transmission cavity is formed in the tank. The sewer sludge cleaning device is characterized in that the positions, on the left and right sides of the lifting transmission cavity, of the tank are symmetrically provided with storage grooves with downward openings. Fixing devices forsupporting the tank are arranged in the storage grooves. A lifting motor is fixedly mounted on the rear sidewall of the lifting transmission cavity. The lifting motor is connected with a lifting control device. Lifting racks extending up and down and penetrating through the tank are slidably mounted on the left and right sidewalls of the lifting transmission cavity. The rear sidewall of the lifting transmission cavity is rotatably provided with gear shafts in bilateral symmetry. Lifting gears are fixedly mounted on the gear shafts. The lifting gears are in engaged connection with the lifting racks. The lifting racks penetrate through the tank to be fixedly connected with an auxiliary tank on the lower side of the tank.

The invention discloses a self-cleaning air dust removal device, and relates to the technical field of dust removal devices.The self-cleaning air dust removal device comprises a machine body, a flow guide pipe is fixedly connected to the right side in the machine body, the right side of the upper end of the flow guide pipe penetrates through the right surface of the machine body, and an air inlet is formed in a pipe opening in the right end of the flow guide pipe; the dust removal device has the beneficial effects that the filter cartridge is vibrated through pulse airflow on the pulse valve, the situation that dust in air is difficult to filter by the filter cartridge due to the fact that excessive dust is accumulated on the filter cartridge can be effectively prevented, the dust is collected in the dust storage box in a centralized mode, and the dust removal effect is improved through the combination of the dust discharge pipe and the vibrator. And moreover, through the notches formed between the filter cartridges, the dust separated from the filter cartridges can directly fall into the lower end of the interior of the machine body, so that the dust is effectively prevented from falling onto the dust removal component to influence the dust removal effect.

The invention relates to the technical field of medical cause display prevention and treatment, and discloses a high-brightness backlight double-lampshade structure upper lampshade accurate positioning jig. According to the embodiment, a limiting pin is pulled, a rotating shaft is driven to rotate through rotation of a rotating handle, so that a rotating wheel is driven to drive a screw to rotate through a belt, and a fixing base can be adjusted in the horizontal direction through a supporting rod; the dust suction device is matched with the air filtering device to work, dust on the surface of the lampshade and the surface of the lamp holder can be sucked, in the embodiment, through matched work of the dust exhaust device and the sealing device, dust collected in the collecting box can be conveniently treated and discharged, in the embodiment, supporting legs in the height adjusting device rotate, height adjustment is conducted along a threaded sleeve, and the dust exhaust efficiency is improved. The supporting legs are used for supporting, the whole device can be stably supported, and stable work of the device is guaranteed.

The invention discloses a porous fiber material carrier and a preparation method thereof. A fiber material is put in water for cleaning and then is put in ethyl alcohol for soaking, then thorough flushing is performed with ethyl alcohol, the fiber material is dried, smashed and mixed and then is added into a 3D printer for heating and melting, a carrier digital model file is used as a basis, a 3D printing technology is applied to prepare the carrier in a layer-by-layer printing mode. The invention also discloses application of an anaerobic expanded granular sludge bed added with the porous fiber material carrier in treatment of ethyl alcohol waste water. The reactor operation is stable in the starting process of a reactor, the problem of sudden acidification does not occur, the starting time is obviously shortened, the sludge amount in effluent is obviously decreased, the effluent is approximately clarified, and accordingly later discharge treatment is promoted.

The invention relates to a production process for preparing a supramolecular acidification system from glyphosate wastewater, which uses hydroxypropyl-β-cyclodextrin as the main body, glyphosate or diglyphosate as the object, and is assembled under multi-stage normal pressure Reaction and multi-stage vacuum evaporation, concentration to obtain supramolecular acidification system. The production process of using glyphosate wastewater to prepare a supramolecular acidification system can not only completely recycle glyphosate resources, but also effectively protect the environment. The prepared supramolecular acidification products can be used in the fracturing process of oilfield well sites to realize resource utilization Utilization has found a new way out for refractory nitrogen and phosphorus-containing wastewater. At the same time, the condensate produced by the production process of using glyphosate wastewater to prepare the supramolecular acidification system contains almost no refractory metal salts, which is convenient for direct discharge and treatment, and saves treatment costs.

The invention discloses a polyethylene bio-carrier and an application of the polyethylene bio-carrier to sewage treatment. Linear low-density polyethylene serves as a main frame material, the polyethylene, sugarcane residue and activated carbon are mixed according to proportion, and die-casting molding is implemented. The sugarcane residue is flushed by ethyl alcohol, dried and crushed. The activated carbon is selected from common powdery activated carbon in the market. The cost of the bio-carrier is greatly reduced, and the bio-carrier is applied to aerobiotic and anaerobic biological treatment processes. The bio-carrier is high in bio-film culturing speed, process stability is enhanced, starting time of a process is obviously shortened, sludge amount in drained water is obviously reduced, and the drained water is close to clear, so that later drainage treatment is facilitated.

The invention discloses an easy-to-use urinary catheterization nursing device for urinary surgery. The device comprises a sickbed, a self-cleaning structure and a connecting structure; a position driving adjusting structure is arranged on the outer edge of the sickbed; a urine storage box is fixed to the lower end of the sickbed; the self-cleaning structure is fixed to the right side of the urinestorage box; a communicating catheter is connected to the upper right end of the urine storage box; the connecting structure is connected to the tail end of the communicating catheter; and a storing and cleaning structure is arranged outside the connecting structure. Through arrangement of medical cotton pads, medical alcohol can be adsorbed and stored, then a certain disinfection effect can be achieved on the connecting structure placed on the device through the medical alcohol, so that it is guaranteed that a urethral catheter cannot be polluted when the connecting structure is connected with the urethral catheter. The urethral catheter of a patient can be conveniently connected through the connecting structure, urine discharged by the patient can be conveniently received, and meanwhile,a large amount of urine can be stored through the urine storage box, so that the problem that a caregiver frequently cleans a urine bag for the patient can be avoided.

The invention discloses a polyethylene bio-carrier and an application of the polyethylene bio-carrier to sewage treatment. Linear low-density polyethylene serves as a main frame material, the polyethylene, sugarcane residue and activated carbon are mixed according to proportion, and die-casting molding is implemented. The sugarcane residue is flushed by ethyl alcohol, dried and crushed. The activated carbon is selected from common powdery activated carbon in the market. The cost of the bio-carrier is greatly reduced, and the bio-carrier is applied to aerobiotic and anaerobic biological treatment processes. The bio-carrier is high in bio-film culturing speed, process stability is enhanced, starting time of a process is obviously shortened, sludge amount in drained water is obviously reduced, and the drained water is close to clear, so that later drainage treatment is facilitated.