108results about How to "Efficient retention" patented technology

The invention discloses a preparation method of a reverse osmosis membrane and the reverse osmosis membrane. The preparation method comprises the following steps: (1) adding polyethersulfone into N, N-dimethylacetamide in a heating and stirring state, and stirring for a period of time after charging is completed, so as to obtain a mixed solution; (2) cooling the mixed solution, continuing to add a pore-foaming agent, and stirring for a period of time after charging is completed to obtain a precursor solution; (3) performing vacuum defoaming treatment on the precursor solution to obtain a membrane casting solution; (4) loading the membrane casting solution on a carrier, and then carrying out gel bath treatment to obtain a base membrane; and (5) performing polyamide treatment on the surface of the base membrane to obtain the reverse osmosis membrane. The preparation method disclosed by the invention is simple in process and low in material cost, and the obtained reverse osmosis membrane has more uniform and more through-type pore structures, higher separation efficiency, more excellent chemical stability and better mechanical properties, can adapt to higher operation pressure, and can continuously and stably operate at higher flux under high pressure.

The invention discloses a machining mold for fastener production and a machining method thereof.The machining mold comprises a mold body, a fixing piece is fixedly arranged on the mold body, a mounting sleeve is arranged on the outer side of the fixing piece in a sleeving mode, a reinforcing piece for abutting against and fixing the fixing piece is arranged on the mounting sleeve, and a feeding pipe is clamped in the fixing piece; a filtering piece for filtering the metal melt is inserted into the feeding pipe; through cooperation of the circulating flow channel and the filtering part, it is ensured that impurities can be efficiently removed in the flowing process of metal melt, meanwhile, pipeline blockage caused by impurity accumulation and metal melt solidification is avoided, the metal melt can flow along the conical surface through a conical barrel and filtering holes in the filtering part, the impurities are effectively intercepted, and the filtering effect is improved. And the C-shaped design of the circulating runner allows filtered impurities and part of the metal melt to enter the feeding pipe again, the runner is kept unblocked, and the design not only prevents accumulation of the impurities, but also avoids solidification of the metal melt through circulating flow.

The invention discloses a preparation method and application of a catalytic membrane based on monatomic iron-manganese oxide, and belongs to the field of catalytic membrane water treatment. The invention aims to solve the problems that a chromium fog inhibitor F-53B in the existing chromium plating wastewater is difficult to degrade, and the degradation rate is greatly reduced when residual PAM and F-53B coexist. The method comprises the following steps: 1, preparing a casting solution; 2, dripping the membrane casting solution into pores of a hollow ceramic membrane substrate and drying; 3, preparing a potassium ferricyanide aqueous phase solution; 4, preparing a manganese acetylacetonate oil phase solution; and 5, dipping the dispensed ceramic membrane substrate in a potassium ferricyanide water-phase solution, dropwise adding a manganese acetylacetonate oil-phase solution into pores of the ceramic membrane substrate subjected to water-phase treatment, and finally calcining. The application comprises the following steps: degrading chlorinated polyfluoroalkyl ether sulfonate; or in the presence of polyacrylamide, the catalyst is used for degrading the chlorinated polyfluoroalkyl ether sulfonate. The preparation method is used for preparation and application of the catalytic membrane based on the monatomic iron-manganese oxide.

The HEPA filter element type waterproof dust collection bag comprises a plastic bag body and a main body plastic part, the plastic bag body is fixedly connected with the back face of the main body plastic part, a dust collection channel and a filter element installation chamber are arranged in the main body plastic part, a front air outlet is formed in the front face of the main body plastic part, and a rear air outlet is formed in the back face of the main body plastic part. A front dust suction opening is formed in the front face of the main body plastic part, a rear dust suction opening is formed in the back face of the main body plastic part, the rear dust suction opening and the rear air outlet are communicated with the interior of the plastic bag body, a filter element made of HEPA filter paper is installed in the filter element installation chamber, and the periphery of the filter element is bonded with the main body plastic part through hot melt adhesive. The HEPA filter element type waterproof dust collection bag is good in waterproof performance, the filtering effect cannot be affected by moisture, and the dust collection bag is convenient to use and long in service life. The filter element formed by the HEPA filter paper is good in filtering effect and can effectively intercept garbage such as dust. The dust collector can be used for absorbing water without worrying that the dust collection bag is affected by moisture.

The invention discloses a modified flocculant and equipment for rapidly removing microplastics in drinking water, and the modified flocculant is a polyaluminum sulfate-titanium tetrachloride-poly dimethyl diallyl ammonium chloride ternary composite flocculant. The pH application range value is increased by compounding with the poly dimethyl diallyl ammonium chloride, the charge neutralization bridging and netting capabilities are enhanced, and the adsorption bridging through a polymer chain is enhanced, so that the flocculant has the advantages of strong flocculation capability, quick demulsification, high settling velocity and small flocculant volume; and the water purifier has very strong purification capacity on fine suspended matters such as micro-plastics in water. Through the special flocculant adding, stirring and precipitation structure design, the removal rate of the micro-plastics is remarkably improved.

The invention discloses an RTK high-precision positioning tamper construction data management method and system, and relates to the field of tamper construction in composite foundation engineering, and the method comprises the following steps: obtaining the GPS positioning data of different working parts of a tamper through a single-machine double-GPS module, and positioning the respective position and height; processing the obtained GPS positioning data by using an RTK technology to obtain high-precision position information; and according to the high-precision position information, whether the position of the rammer deviates from the ramming pile position or not is judged in combination with construction pile position distribution diagram data, and if deviation occurs, alarm information is sent out. Through the design of the single-machine double-GPS module, the position and height information of the rammer body and the rammer can be obtained at the same time, data synchronism is guaranteed, the problems that cost is increased and information synchronization is inconsistent due to the fact that a plurality of devices are used are solved, the overall performance and stability of the devices are improved, and the practicability is high. And the requirement on multi-position information in the construction process is better met.

The utility model discloses rotary evaporation and concentration equipment for liquid fertilizer. The rotary evaporation and concentration equipment comprises a shell, a differential stirring mechanism and a vacuum pump mechanism, the shell comprises a cushioning outer shell, a motor arranged at the bottom of the inner wall of the cushioning outer shell and a rotating barrel arranged over the motor. An upper cover is arranged above the cushioning shell; the motor is fixedly connected with the cushioning shell; the differential stirring mechanism comprises a planetary gear set arranged at the bottom of the inner wall of the rotating barrel and a rotating sleeve arranged on the planetary gear set; a plurality of brackets are arranged on the rotating sleeve, and rotating fan blades are arranged on the brackets; the vacuum pump mechanism comprises an air guide pipe arranged on the upper cover and a vacuum pump arranged at the other end of the air guide pipe; a heating unit is arranged in the cushioning shell and fixedly connected with the cushioning shell. By adopting the unique differential rotation design, the stirring and concentrating efficiency is improved, and the uniformity and stability of liquid in the concentrating process are ensured.

The utility model discloses a sponge city seepage and drainage structure, and relates to the technical field of sponge city construction. The device comprises a foundation, a drainage well is arranged on the foundation, a drainage pipeline is arranged in the foundation and communicated with the drainage well, a well lid is arranged on the top of the drainage well, and an opening and closing adjusting mechanism is arranged on the well lid. By arranging the opening and closing adjusting mechanism, the drainage opening of the well lid can be effectively adjusted, so that the water inlet amount of the drainage well is adjusted, the drainage effect is effectively improved, meanwhile, the filtering basket is arranged under the well lid, impurities carried by the drainage well during drainage can be effectively intercepted, and the drainage well is convenient to use. Therefore, the situation that the drainage pipeline is blocked after sundries enter the drainage well is avoided, and the practicability of the device is greatly improved.

The utility model relates to a kind of environment-friendly sewage sedimentation pretreatment device, it is related to sewage treatment technical field, including pre-sedimentation tank, the upper portion of the pre-sedimentation tank is provided with separation cylinder, the front end of the separation cylinder is installed with sewage inlet pipe in one side, the upper portion of the separation cylinder is installed with separation water outlet pipe, the bottom of the separation cylinder is installed with sludge discharge pipe by connecting pipe, one end of the sludge discharge pipe is equipped with first motor, the other end of the sludge discharge pipe is equipped with sludge discharge port, the inside of the pre-sedimentation tank is equipped with multiple equidistant distribution and parallel inclined plate, the bottom of the pre-sedimentation tank is conical structure, and the bottom of conical structure is equipped with sludge discharge cavity, the lower end of one side of the sludge discharge cavity is installed with second motor, the inside of the sludge discharge pipe and sludge discharge cavity is all installed with auger mechanism, and the scheme solves the problem that a large number of and complex component impurity particles in sewage are not treated directly to deposit, and the problem that the deposition effect is poor and the burden of deposition equipment is increased.

The gas drying device for purification comprises a gas inlet main pipe and two exhaust main pipes, the gas inlet main pipe is connected with two gas inlet branch pipes through a first tee joint, the gas inlet branch pipes are connected with back-flushing exhaust pipes, the gas inlet branch pipes are connected with two drying and purifying mechanisms through second tee joints respectively, the number of the four drying and purifying mechanisms is four, and every two drying and purifying mechanisms form a group. The main exhaust pipes are respectively connected with the two drying and purifying mechanisms in the same group through a fourth tee joint, the two main exhaust pipes are communicated through a backflushing gas inlet pipe, each drying and purifying mechanism comprises three gas treatment units which are connected in series, each gas treatment unit comprises a labyrinth filter and a medium cylinder which are connected with each other, and the gas treatment units are connected through a third tee joint. And the third tee joints at the same positions in the same group of drying and purifying mechanisms are also connected through a side communicating pipe provided with a fourth valve. The device can effectively solve the problem of powder filtration in the molecular sieve dryer, so that the operation efficiency is improved, the pulverization condition of an operation medium can be effectively monitored, and the failure of the molecular sieve dryer is avoided.

The invention relates to the technical field of dry-mixed mortar dust removal, and discloses a dust removal device of a dry-mixed mortar production system.The dust removal device comprises a shell, a rotating frame is fixedly connected to the inner wall of the shell, a sliding rail is rotationally connected to the outer wall of the rotating frame, and before use, a power source of an electric telescopic rod is switched on, and the electric telescopic rod regularly stretches out and draws back; when the electric telescopic rod shrinks, the bottom of the water storage tank inclines towards the left side, the water surface is not changed under the influence of gravity, and therefore the left side edge of the liquid level slides downwards along the left side of the inner wall of the water storage tank; the liquid level sliding downwards carries part of fine particles to make contact with the inner wall of the water storage tank, the viscosity of the fine particles is increased due to contact with water, when the fine particles make contact with the inner wall of the water storage tank, the high-viscosity fine particles adhere to the interior of the water storage tank, and effective interception of the fine particles is achieved through application of the components.

The invention discloses a treatment system for synergistically removing odor substances and a new pollutant PFAS in water and a treatment method thereof. The treatment system comprises a pre-oxidation unit, an algae removal, adsorption and clarification unit, a membrane separation and concentration unit and a destruction unit which are connected in sequence. The pre-oxidation unit is provided with an oxidation pond with a transverse reciprocating dynamic aeration assembly, so that the ozone mass transfer efficiency is improved. The algae removal, adsorption and clarification unit enables a suspended carbon mud bed to periodically expand and contract through a pulse generator so as to strengthen adsorption. The membrane separation and concentration unit adopts a modified polyether sulfone conical-end filtering membrane and is matched with an online cleaning mechanism, so that PFAS is efficiently intercepted, and secondary pollution is avoided. The destroying unit is used for carrying out synergetic high-temperature incineration on the membrane separation concentrated water and the waste carbon mud, and PFAS is thoroughly decomposed at the temperature higher than or equal to 900 DEG C; by optimizing ozone aeration, pulse adsorption, fluorine-free membrane separation and collaborative incineration, efficient collaborative removal of odor substances and new pollutant PFAS and harmless treatment of waste are achieved, the system integration degree is high, the treatment effect is good, and the risk of secondary pollution is avoided.

The invention provides a preparation method of a polyvinyl composite forward osmosis membrane, which comprises the following steps: carrying out interfacial polymerization reaction on a 10-50 mu m polyvinyl membrane, a water phase solution and an oil phase solution, drying, modifying twice, and drying to obtain the forward osmosis membrane. The invention also provides application of the forward osmosis membrane prepared by the preparation method in preparation of emergency water purification equipment. The polyvinyl composite forward osmosis membrane is good and stable in performance and high in water flux, and the water permeation time can be obviously shortened. Besides, the forward osmosis membrane water bag has the advantages of being small in size, low in manufacturing cost, small in mass, easy to carry and capable of being repeatedly used, escherichia coli can be intercepted, harmful substances such as viruses and heavy metal can be efficiently intercepted, and the forward osmosis membrane water bag is suitable for various use scenes.

The application discloses a whitening and freckle-removing composition containing white tomato and chases yellow grass, a preparation method and application thereof, and belongs to the technical field of food, wherein the whitening and freckle-removing composition is composed of white tomato powder and chases yellow grass powder with a weight ratio of 1-3:2-7. The preparation method comprises the following steps: (1) beating, separating, concentrating and drying white tomatoes to obtain white tomato powder; (2) soaking chases yellow grass in acidic water, performing solid-liquid separation, concentrating and drying the obtained clear liquid to obtain chases yellow grass powder; and (3) mixing the white tomato powder and the chases yellow grass powder. The application utilizes the combination of white tomatoes and chases yellow grass, and improves the preparation process of chases yellow grass, so that the two components produce a synergistic effect in inhibiting tyrosinase activity and inhibiting melanin production.

The application discloses a paper-based and pulp molded product strong water-based structure resin composition for constructing a fiber matrix, a kit and a preparation and application method thereof, and belongs to the technical field of papermaking wet end chemistry and pulp molding materials. In response to the global trend of replacing plastic with paper and fluorine-free control of food contact materials, the application aims at the pain point of failure of traditional chemicals in a high recycling pulp proportion and a closed water circulation high conductivity system, and constructs an acrylic polycarboxylic acid polymer and inorganic-organic dual charge buffer synergistic system. The scheme realizes the multiplication effect of physical strength such as breaking and ring pressure and the water resistance and oil resistance barrier performance by a unique crosslinking mechanism at a very low dosage, which is better than conventional enhancement technology on the market. The composition is a full water-based system and does not contain perfluorinated compounds, which ensures complete pulp recycling while giving the product excellent wet stiffness and film-forming density, and provides a green solution with high efficiency, low cost advantage and compliance for the papermaking and pulp molding industry.

This utility model discloses a waste treatment device for isothiazolinone production, relating to the field of isothiazolinone production technology. The waste tank is connected to a first filter, the first filter is connected to a settling tank, the settling tank is connected to a distillation tank, the distillation tank is connected to a degradation tank, the degradation tank is connected to a sedimentation tank, the sedimentation tank is connected to a second filter, the second filter is connected to a nanofiltration membrane device, and the nanofiltration membrane device is connected to a treatment water tank. This device can effectively remove harmful substances from the isothiazolinone production waste, achieving harmless treatment of the waste and also realizing resource recycling to a certain extent, thus possessing good environmental and economic benefits.

The utility model discloses an urban river channel revetment structure integrating landscape and ecological functions, and relates to the technical field of river channel revetments, the urban river channel revetment structure comprises a slope body and green plant modules, a plurality of supporting structures are uniformly arranged on two sides of the slope body along the slope direction, and the top surfaces of the supporting structures are horizontally arranged; the two ends of the bottom wall of each green plant module are erected on the top walls of the two supporting structures at the same height correspondingly. The device has the advantages that the diversity and adaptability of a plant-rock-soil body system in the conventional technology can be improved, and the challenges faced by the plant survival rate and the landscape effect in different water level stages (the wet season, the flat season and the dry season) of a river are effectively solved. And meanwhile, the problem of local water flow accumulation caused by rain wash in a heavy rainfall season and the phenomenon of unstable growth of bank slopes and green plants caused by the problem can be effectively solved.

The invention relates to the technical field of polishing equipment, discloses a polishing machine tool for plastic wheels of toy cars, and aims to solve the problems that the polishing time is long, molten slag scratches hubs, and the polishing quality of the plastic hubs is affected. Through the arrangement of the grinding mechanism and the discharging mechanism, the basic shaping and deburring capacity is provided through a grinding wheel, grinding particles serve as free grinding materials and are continuously bitten into a contact grinding area by two wheel bodies rotating in the same direction at different speeds, the composite effect of rolling grinding, rolling polishing and micro cutting is formed, the grinding quality is greatly improved, and meanwhile, the grinding efficiency is improved. Partial sliding friction is replaced by rolling friction, the grinding heat is greatly reduced, the generation amount of plastic slag is reduced, the influence on the grinding quality of the plastic hub is reduced, in addition, the plastic slag attached to the surface of the grinding wheel is continuously scraped by the grinding particles, self-cleaning of the grinding wheel is achieved, and the common problems that the grinding wheel is prone to sticking, the surface is gelatinized and scratched during plastic grinding are solved.

The utility model discloses a multi-section variable diameter methanol removal distillation tower, and particularly relates to the technical field of methanol distillation towers, the multi-section variable diameter methanol removal distillation tower comprises a supporting assembly, a distillation assembly is fixedly connected to an inner cavity of the supporting assembly, a cooling assembly is fixedly connected to the upper part of the distillation assembly, and a separation assembly is fixedly connected to the left part of the cooling assembly. The lower portion of the separation assembly is fixedly connected with a slag prevention assembly, and the right portion of the supporting assembly is fixedly connected with a heating assembly. According to the multi-section variable-diameter methanol removal distillation tower disclosed by the utility model, the separation of methanol liquid and gas can be realized through the designed separation assembly, the cooled waste gas possibly still contains uncondensed methanol steam or tiny liquid drops, and the uncondensed methanol steam or tiny liquid drops are blown back into the distillation tower through the fan, so that the uncondensed methanol steam or tiny liquid drops can participate in the gas-liquid mass transfer process again and are further separated and recycled; meanwhile, heat carried in the waste gas returns to the tower along with the gas flow, and the heat can partially replace the heating load of the reboiler.

This utility model discloses a heat dissipation and dust prevention device for a frequency converter, including a frequency converter body. The bottom shell of the frequency converter body is provided with a heat dissipation window. It also includes a dust prevention mechanism and a cooling fan. The dust prevention mechanism includes a dust cover, a bent guide tube, a first resistance frame, a second resistance frame, dustproof cotton sheets, and a screw seat. By setting the dust prevention mechanism at the frequency converter body outside the heat dissipation window, together with the cooling fan, a heat dissipation and dust prevention structure is formed. The dust prevention mechanism can effectively trap dust through components such as the dust cover, the first resistance frame, and the dustproof cotton sheets in the second resistance frame, preventing dust from adhering to the cooling fan and fins inside the frequency converter body. Furthermore, the dust cover of the dust prevention structure is equipped with a cooling fan. The cooling fan, together with the bent guide tube, the dust cover, and the side wall air grooves of the first resistance frame and the second resistance frame, form a meandering airflow structure, which intercepts dust while ensuring smooth airflow and ensuring efficient heat dissipation of the frequency converter.

This utility model discloses a pretreatment device for raw materials in the production of high-purity Kathon, relating to the field of Kathon production technology. The inlet of an ultrasonic reactor is connected via pipelines to a methylchloroisothiazolinone raw material tank and a deionized water tank. The outlet of the ultrasonic reactor is connected via a screw pump to a ceramic membrane device. The liquid phase outlet of the ceramic membrane device is connected via pipelines to a distillation column. The top gas phase outlet of the distillation column is connected via pipelines to a light component tank, an organic solvent tank, and a purified methylchloroisothiazolinone tank. This device achieves effective separation and purification of different components, improving product purity, while simultaneously recovering organic solvents and reducing production costs.

The utility model relates to the technical field of wafer type butterfly valves, in particular to a novel alloy wafer type butterfly valve which comprises a valve body, the bottom of the valve body is fixedly connected with an L-shaped block, the inside of the L-shaped block is fixedly connected with a machine frame, one side of the machine frame is fixedly connected with a motor, the output end of the motor is provided with a rotating shaft, and the rotating shaft is connected with the valve body. A rotating shaft is arranged in the valve body, one side of the rotating shaft is connected with a scraping mechanism and a rotating mechanism, a filter screen is arranged in the valve body, one side of the scraping mechanism is fixedly connected with a scraping plate, the scraping plate corresponds to the filter screen, the rotating mechanism corresponds to the filter screen, two sides of the valve body are connected with pipelines, the scraping mechanism comprises a rocker, and the rocker is fixedly connected with the rotating mechanism. The rocker is fixedly connected with the rotating shaft, the other end of the rocker is connected with a square block, the outer side of the square block is connected with an O-shaped block, and one side of the O-shaped block is fixedly connected with a vertical rod.

The invention provides a preparation method of micro-powder-free cobalt hydroxide, belongs to the technical field of lithium ion battery material preparation, and solves the problems that the content of micro powder is high and the synthesis process is difficult to control when the cobalt hydroxide is prepared in the prior art. The method comprises the following operation steps: preparing a solution, carrying out a synthetic reaction, aging, washing, drying and the like, and synthesizing a crimson beta-type cobalt hydroxide product with a product index D0 greater than or equal to 3 microns and regular morphology by controlling the temperature of a synthetic raw material solution at-5 to + 5 DEG C and controlling proper synthesis conditions. The cobalt hydroxide prepared by the method is regular in microstructure, does not contain fine micro-powder particles, and can be used for preparing cobaltosic oxide required by high-voltage lithium cobalt oxide.

The invention discloses a low-energy-consumption microalgae cell separating and harvesting device and method based on plant fibers, and particularly relates to the field of microalgae cell concentration and separation. Comprising a separation box, the separation box communicates with a liquid inlet pipe and an air inlet pipe, the liquid inlet pipe is provided with a first valve, the air inlet pipe is connected with an inflation pump, the separation box communicates with a liquid discharging pipe, the liquid discharging pipe is provided with a second valve, the two sides of the separation box communicate with feeding channels, and the space between the two feeding channels is filled with a plant fiber filtering layer. A fixed plate and a movable plate are arranged in the separation box, a first water passing hole is formed in the fixed plate, a driving assembly used for driving the movable plate to slide in the separation box is arranged on the movable plate, and a second water passing hole is formed in the movable plate. By the adoption of the technical scheme, the problem that an existing device cannot achieve efficient collection and separation of a large number of algae cells in an artificial culture scene or an algae bloom scene of unicellular algae is solved, and resource utilization of natural plant fiber materials and efficient harvesting of the algae cells are achieved.

This utility model provides an automatic feeding bucket for sludge excavation, belonging to the field of excavation bucket technology. It addresses the problems affecting sludge excavation efficiency, increasing operator workload, and hindering the flexibility and convenience of bucket use in practical applications. The bucket includes a main body with two mounting supports fixedly connected to the left and right sides of the upper end of the main body; an adjusting bracket slidably connected to the inner end of the main body; a hydraulic cylinder located on the inner side of the upper end of the main body; a connecting block fixedly connected to the outer end of the hydraulic rod; a guide cylinder fixedly connected to the upper end of the adjusting bracket; a positioning support column coaxially fixedly connected to the outer end of the guide cylinder; and a positioning mounting structure positioned between the positioning support column and the connecting block. This design reduces the frequency of cleaning the bucket body and the subsequent dewatering load, effectively improving sludge excavation efficiency, alleviating operator workload, and enhancing the flexibility and convenience of the bucket in practical applications.

The utility model discloses a PC stone-like water permeable brick, and relates to the technical field of water permeable bricks. The water permeable hole is formed in the brick body, and a filter frame assembly is mounted on the water permeable hole; the water guide groove is annularly formed in the surface of the brick body and communicated with the water permeable holes, and the depth of the water guide groove is gradually increased from the periphery to the middle; the first buckle assembly and the second buckle assembly are arranged on the left face, the right face, the front face and the back face of the brick body respectively and used for left-right splicing and front-back splicing of the adjacent brick bodies respectively. Through the arrangement of the water permeable holes and the water guide grooves which are matched with the peripheries of the water permeable holes and are gradually deepened from the periphery to the middle, water can be drained into underground water in a concentrated mode, and the filtering frame assemblies installed on the water permeable holes can effectively intercept large pollutants such as suspended particles and leaves in rainwater in the rainwater concentrated drainage process. Meanwhile, the filter frame assembly is simple in structure, convenient to mount with the brick body and convenient to clean.

The invention discloses a coal gasification slag-based porous sponge for uranium mine wastewater treatment and a preparation method thereof, relates to the field of radioactive wastewater treatment and solid waste recycling, and aims to solve the technical problems of poor adsorption inertia, poor interface stability and insufficient selectivity of the existing coal gasification slag-based material in strongly acidic uranium mine wastewater. According to the technical key points, the method comprises the following steps: step 1, preparing an alkaline solution, putting the coal gasification slag into the alkaline solution for etching treatment, and collecting the treated coal gasification slag to obtain solid powder A; 2, grinding and mixing the solid powder A and urea, and performing pyrolysis treatment in a nitrogen atmosphere to obtain nitrogen-doped coal gasification slag-based porous sponge B; 3, placing the porous sponge B in a mixed acid solution of nitric acid and hydrochloric acid for carboxylation modification to obtain sponge C with the surface rich in carboxyl; step 4, immersing the sponge C into a PEI aqueous solution; pEI is chemically bonded with the sponge through carboxyl on the sponge C, and the coal gasification slag-based porous sponge is obtained.

The application discloses a fluorine-modified graphene oxide-based aerogel bilayer as well as a preparation method and application thereof, and comprises a graphene oxide-based composite aerogel, wherein a main body of the graphene oxide-based composite aerogel comprises graphene oxide and sodium cellulose or chitosan; one side of the graphene oxide-based composite aerogel is subjected to modification treatment of fluorochlorosilane to provide hydrophobic and oleophobic properties. The preparation method comprises the following steps: preparing a graphene oxide aqueous solution and an aqueous solution of sodium cellulose or chitosan; mixing the graphene oxide solution and the sodium cellulose solution or the chitosan solution; freeze-drying the mixed solution, and then vacuum drying to obtain an aerogel; and using an organic solution containing fluorochlorosilane to infiltrate a non-woven fabric, placing the infiltrated non-woven fabric on a surface of the aerogel, standing, and drying. The graphene oxide-based aerogel is subjected to hydrophobic and oleophobic modification on the upper layer by using fluorochlorosilane, and the lower layer is hydrophilic, so that the graphene oxide-based aerogel has good salt resistance and stain resistance and high evaporation efficiency, and has a wide application prospect in the field of seawater desalination.

The application provides a split-hole plate type grid cleaner and relates to the technical field of water treatment equipment, which solves the technical problems of easy clogging, low interception efficiency and grid residue leakage in the prior art. The device is a split-hole plate type grid cleaner, which comprises a grid mechanism, a plurality of alternately arranged first plates and second plates, a plurality of filter holes respectively arranged on the contact sidewalls of the first plates and the second plates, a box body composed of two symmetrically arranged box plates, a plurality of back-shaped sliding grooves respectively arranged on the opposite inner sidewalls of the two box plates, a cleaning mechanism for automatically cleaning the first plates and the second plates, a conveying system comprising a transmission conveying mechanism and a cleaning conveying mechanism, the transmission conveying mechanism is used for driving the first plates and the second plates to circularly move along the back-shaped sliding grooves, and the cleaning conveying mechanism is used for accelerating the driving of the plates when the plates reach below the cleaning device, so that the first plates and the second plates are separated, and the cleaning device can efficiently clean the surfaces of the plates.