33results about How to "Improve anti-clogging performance" patented technology

The invention discloses injection molding equipment and an injection molding method thereof, and belongs to the technical field of injection molding. The injection molding equipment comprises a counter, an injection molding machine and a forming mold, one end of the counter is provided with the forming mold, the other end is provided with the injection molding machine, one end of the injection molding machine abuts against the forming mold, the other end is provided with a hopper, and a heating mechanism is arranged between the two ends; an injection molding machine comprises a first injection molding section, a driving section, a pushing section, a second injection molding section and a nozzle which are sequentially connected and communicated, the nozzle abuts against a forming mold, and a hopper is arranged on the first injection molding section; the injection molding equipment has a very good homogenizing effect on molten plastic, can remove insoluble impurities or incompletely molten raw materials contained in fluid, can play a very good filtering role, avoids blockage, prolongs the service life of the injection molding equipment, improves the production efficiency of the injection molding equipment, and protects the precision and stability of the injection molding equipment.

The invention relates to a preparation method of recycled aggregate pervious concrete, which comprises the following steps: sequentially crushing and screening waste concrete to obtain waste stone powder with the particle size of less than 0.075 mm and coarse aggregate with the particle size of 5-30 mm; the method comprises the following steps: washing and drying waste stone powder, adding glass powder and sodium hydroxide, and reacting to obtain a sodium silicate alkali activator; the preparation method comprises the following steps: firstly, adding coarse aggregate into a magnesium alginate aqueous solution, soaking until the coarse aggregate absorbs water to be saturated, sequentially adding sodium polyacrylate, mango butter and hydrogenated polyisobutene during soaking, stirring and mixing, then introducing carbon dioxide gas for carbonization, and carrying out post-treatment after carbonization is finished, so as to obtain recycled aggregate; and mixing the cement, the slag powder, the alkali activator, the machine-made sand, the recycled aggregate, the polycarboxylate superplasticizer and water to obtain the pervious concrete. The invention provides a preparation method for completely replacing natural coarse aggregate of the pervious concrete with the recycled aggregate, and the slag powder is used for replacing cement in a large proportion to serve as a cementing material, so that the high-strength and high-permeability all-waste aggregate green pervious concrete material can be prepared.

The application discloses a flushable anti-dripping flow adjustable pressure compensation irrigation device and a use method. The irrigation device comprises an irrigation device shell, a water inlet section is arranged at the upper end of the irrigation device shell, a water outlet section is arranged at the lower end of the irrigation device shell, an energy absorber is arranged in the irrigation device shell, a pressure compensation block and a labyrinth flow channel are arranged in the energy absorber, the pressure compensation block is fixed above the labyrinth flow channel through a first clamping groove, the energy absorber is divided into an upper cavity and a lower cavity, the upper cavity is communicated with the water inlet section, the lower cavity is communicated with the water outlet section, and the upper cavity and the lower cavity are connected through a flow guide groove. The irrigation device can adjust the flow size according to the needs of crops during drip irrigation, prevent dripping when water supply is stopped, clean impurities and restore the performance of the irrigation device when the irrigation device is blocked by impurities in water.

The utility model relates to the technical field of acid gas treatment, in particular to a multi-stage treatment system for acid gas, which comprises a first-stage alkaline tower, a second-stage alkaline tower, a dehydration facility and an activated carbon adsorption facility which are connected in sequence, the device disclosed by the utility model has the beneficial effects that the two stages of alkaline washing towers are connected in series, so that the total gas-liquid contact area is increased, and the removal efficiency of acid gas is improved; through the dense design of nozzles on the periphery of the tower body, the liquid film coverage rate of the tower wall area is increased, gas escape is avoided, and the alkali washing efficiency is further improved; the Pall ring packing is made of CPVC materials, the corrosion resistance is better than that of traditional PP materials, the service life is prolonged, meanwhile, the packing layer is high in anti-blocking capacity, and the shutdown cleaning frequency is reduced.

The present invention relates to the technical field of coal sample detection in mines, and in particular to a collection device for coal sample detection in mines. The device includes a data acquisition module and a bidirectional airflow module, and the bidirectional airflow module includes an airflow regulating device; the data acquisition module is used to obtain different types of parameter data in the external protection drill pipe at each moment in the current time period, and the current time period is the time period in the process of coal sampling in mines; the airflow regulating device is used to process the acquired parameter data, and determine the degree of blockage in the external protection drill pipe in the current time period; based on the degree of blockage in the external protection drill pipe in the current time period, the intensity of the input airflow at the next moment is determined and adjusted accordingly. The present invention realizes real-time clearing of blockage in the collection device for coal sample detection in mines.

The invention relates to the technical field of irrigation, in particular to a water, fertilizer and gas integrated irrigation system and method. The irrigation system includes: a support assembly; the water supply assembly is arranged on the supporting assembly; the water supply assembly is provided with a water suction assembly and a water supply port; the water absorption assembly is suitable for being connected with a water source, and the water supply port is suitable for being connected with an irrigation pipe network; the fertilizer supply assembly is arranged on the supporting assembly; the fertilizer supply assembly is connected with the water absorption assembly; the micro-nano bubble assembly is provided with a water inlet pipe and a water outlet pipe; the water inlet pipe and the water outlet pipe are both connected with the water supply assembly; the electric control assembly is in communication connection with the water supply assembly, the fertilizer supply assembly and the micro-nano bubble assembly at the same time. The energy generated when the micro-nano bubbles are broken is utilized, the boundary of the irrigation emitter and a drip irrigation pipe network can be scoured, the anti-blocking performance of the irrigation emitter is enhanced, and the uniformity of irrigation is not affected by micro-nano air entrapping.

The invention relates to the technical field of waste gas treatment equipment, and discloses waste gas purification equipment for a PE pipe production line, the waste gas purification equipment comprises a zeolite rotating wheel, the zeolite rotating wheel comprises a front cylinder and a rear cylinder, the front cylinder and the rear cylinder are internally and movably connected with a front rotating wheel and a rear rotating wheel which keep rotating respectively, and a separation cavity is formed between the rear rotating wheel and the front rotating wheel; a front adsorption cavity, a front desorption cavity and a front cooling cavity are arranged between the front barrel and the separation cavity, a rear adsorption cavity, a rear desorption cavity and a rear cooling cavity are arranged between the separation cavity and the rear barrel, the front adsorption cavity and the rear adsorption cavity are connected in series, and the end part of the front adsorption cavity is communicated with waste gas through an adsorption pipe. According to the waste gas purification equipment for the PE pipe production line, a tandem type double-rotating-wheel structure is adopted, high-boiling-point pollutants are preferentially adsorbed and borne through the front rotating wheel, and adjustable internal reflux and differential rotating speed design are matched, so that the problem of zeolite pore channel blockage is solved, meanwhile, the concentration multiple of low-concentration waste gas is greatly increased, and the service life of the waste gas is prolonged. And stable self-heating operation of the catalytic oxidation furnace is ensured.

This invention belongs to the field of industrial filter cloth technology, and discloses an anti-clogging polyester monofilament filter cloth and its preparation method. By passing untwisted polyester multifilament bundles through a first coating liquid, each monofilament has a double hydrophobic interface; the multifilaments are twisted to form the weft, and the polyester monofilaments form the warp in a woven filter cloth; after calendering, the filter cloth is coated with a second coating liquid to form a hydrophilic coating. The resulting anti-clogging polyester monofilament filter cloth solves the technical bottlenecks of easy clogging and low filtration efficiency in polyester monofilament filter cloths. When filtering slurry, the liquid easily forms a hydration layer on the hydrophilic layer of the filter surface, preventing intercepted particles from directly adhering to the filter surface, thereby improving the filter cloth's anti-pollution and anti-clogging capabilities. The double hydrophobic interface in the fiber gaps within the multifilament allows infiltrated oil, water, ultrafine particles, colloids, etc., to quickly detach, making them less likely to adhere and accumulate inside the fibers, maintaining smooth filtration and effectively reducing the resistance of the filter press operation. This filter cloth is easy to unload, has a significant anti-clogging effect, a long service life, and high filtration efficiency.

A method for preparing a hydrodemetallization catalyst, belonging to the field of catalyst preparation technology, includes the following steps: impregnating spherical carbon particles with an iron-containing solution and drying them; mixing the dried carbon particles uniformly with alumina sol and forming droplets; drying and calcining the formed products to obtain an iron-modified alumina support; immersing the iron-modified alumina support in an organic ammonium solution for a first and second hydrothermal treatment; drying and calcining the treated products to obtain a treated alumina support; impregnating the treated alumina support with an active component impregnation solution; drying and calcining the impregnated support to obtain the hydrodemetallization catalyst. The catalyst prepared by this method exhibits high dehydrogenation, Ni removal, and V removal activity, while also possessing high tolerance for metal impurities. This catalyst is particularly suitable for the hydrotreating of heavy oil with high Ni impurity content.

The application is suitable for the field of drip irrigation equipment, and provides a micro-gravity variable water irrigator and an irrigation method thereof. First, water flows into the flow channel part through the water inlet of the water irrigator, the water flow in the flow channel part is disturbed by the side wall micro-protrusion structure, the water flow energy dissipation is increased, under the condition of ultra-low pressure water head (0.5-1 m), that is, with the help of small position difference of water source, the traditional power energy is not needed, and the water irrigator can be laid for a long distance; the preferential flow channel structure of the micro-gravity water irrigator does not have a low-speed area, the anti-blocking performance is greatly improved, and the dependence of the drip irrigation system on water source filtration is reduced; in addition, different working pressures can be used to realize various scene applications such as irrigation, salt pressing and underground drip irrigation, and the problems that the traditional water irrigator and drip irrigation belt cannot be effectively applied under the condition of limited traditional power energy and complex water quality in the rainwater collection irrigation area in China are solved.

The application discloses a kind of microfluidic enhanced red mud slurry simultaneous desulfurization carbon sequestration methods, belong to industrial flue gas pollution control and bulk industrial solid waste resource utilization technical field.Simultaneous desulfurization carbon sequestration of red mud slurry method in prior art relies on complex high-temperature modification, mass transfer efficiency is low, particle is easy to block, reactor is difficult to enlarge technical problem, the application adopts wet ultrafine pretreatment combined with serpentine microchannel reactor technology, by red mud in-situ activation and flow field synergistic control realizes flue gas efficient simultaneous desulfurization carbon sequestration.The application process is simple, low in cost, stable in operation, provides a new technical approach for red mud bulk solid waste resource utilization and industrial flue gas pollution reduction and carbon sequestration collaborative management.

The utility model discloses a kind of nozzle replacement structure for live cleaning spray gun, belong to live cleaning spray gun technical field, and its technical solution main point includes spray gun structure, the surface of the spray gun structure is provided with first limit ring, the left side of the spray gun structure is provided with nozzle structure, the surface of the nozzle structure is provided with second limit ring, the surface of the first limit ring is clamped with first limit frame, the inner wall of the first limit frame is clamped with the surface of second limit ring, the inner wall of the nozzle structure is clamped with filter mechanism, it is solved that the nozzle replacement structure of the existing live cleaning spray gun is more using thread connection, needs repeatedly to be positioned and to be twisted when installing maintenance, replacement efficiency is lower, and it is easy to cause uneven force to lead to connection site abrasion, nozzle is easy to loosen even drop when high pressure operation, simultaneously, nozzle is blocked in cleaning medium in long-term use, it is more troublesome when subsequent maintenance, the problem of affecting the working efficiency of live cleaning spray gun.

The utility model is applicable to the technical field of sewage treatment, and provides an anti-blocking point type water distributor for an IC reactor, which comprises a water distribution structure arranged in an IC reaction tank, the water distribution structure comprises a water distribution main pipe, the water distribution main pipe penetrates out of the IC reaction tank and then is connected with a water inlet pipe, and the water inlet pipe is connected with a filter; wherein backwashing structures are arranged on the water distribution main pipe and the water inlet pipe; when the backwashing structure of the water distribution main pipe is opened, a pressure difference exists between the IC reaction tank and the water distribution main pipe, and the pressure of the IC reaction tank is greater than that of the water distribution main pipe. In conclusion, the anti-blocking capability of the point type water distributor of the IC reaction tank is remarkably improved, the maintenance cost of equipment is reduced, the service life of the equipment is prolonged, the downtime is reduced, and the sewage treatment efficiency is improved.

The invention provides a water-saving irrigation device for agriculture and forestry crops. The agricultural and forestry crop water-saving irrigation device comprises a cyclone desanding mechanism, a lamination filtering mechanism and a net type filtering mechanism, the top of the cyclone desanding mechanism is connected with one end of a first water pipe, the other end of the first water pipe is connected with the bottom end of the lamination filtering mechanism, the top of the lamination filtering mechanism is connected with one end of a second water pipe, and the other end of the second water pipe is connected with the net type filtering mechanism. The other end of the second water pipe extends into the net type filtering mechanism; the cyclone desanding mechanism is used for removing silt particles with the particle size larger than 0.05 mm, and the combined filtering precision of the laminated filtering mechanism and the net type filtering mechanism is 120-150 meshes. The water-saving irrigation device for agriculture and forestry crops has the advantages of being capable of effectively treating high-sediment water sources, high in anti-blocking capacity and capable of achieving online cleaning.

The present application provides a kind of ecological purification method for treating aquaculture tail water, and is sequentially provided with multifunctional drainage ditch, ecological oxidation dam, stable sedimentation pond, continuous biological filter pond and composite purification bed along the direction of aquaculture tail water flow.The garbage intercepting device, ecological revetment and buffer zone are arranged in the multifunctional drainage ditch;The ecological weir, ecological frame, fixed pile, water collecting wall and lifting pump are arranged in the ecological purification dam;The floating plant area, multiple interception and purification devices and aeration device are arranged in the stable sedimentation pond;The culture area is arranged in the continuous biological filter pond, and after the water flow passes through multiple aeration biological filter areas, it enters the effluent area uniformly;The composite purification bed includes plants, improved substrate layer, purification layer, filtration and water collection layer, impermeable layer and effluent area.The method can effectively remove the refractory pollutants and toxic and harmful substances in aquaculture tail water, has low construction cost, small land area, low operation and maintenance cost, and the effluent can be resource utilization.

The invention provides a leachate lift pump system with a multi-stage dynamic filtration and anti-blocking structure and a control method, and the leachate lift pump system comprises a reverse rotation cutting mechanism, a first-stage coarse filtration device, a forward crushing mechanism, a second-stage precise filtration device, a vortex centrifugal separation device and a main driving unit which are sequentially arranged in the leachate lifting direction, the main driving unit drives a main pump impeller of the leachate lifting pump system and a forward crushing mechanism coaxially connected with the pump impeller to rotate through a main pump motor; the percolate lift pump system further comprises a vibration monitoring module, viscosity monitoring modules arranged at the pump inlet of the main pump and the percolate flow channel, pressure difference monitoring modules arranged at the filtering devices, a flow monitoring module arranged at the pump outlet of the main pump and a liquid level monitoring module arranged at the percolate collecting pool. The vortex centrifugal separation device is used for separating solid substances and liquid substances of the percolate through centrifugal force of flowing of the percolate; the device is provided with a bionic anti-blocking conveying structure, has a screening and separating function, and can realize efficient multi-stage dynamic filtering and crushing.

This invention relates to the field of construction technology in pebble-rich water-bearing areas, and more specifically, to a construction method for buildings in such areas. The method involves first digging drainage ditches around higher elevations to intercept surface water; then, integrating high and low elevation areas for unified excavation of the foundation pit, utilizing natural elevation differences and a gravity-fed drainage system using perforated UPVC pipes and graded crushed stone; setting up temporary water-retaining embankments and implementing staggered construction from high to low elevations, with closed-loop dedicated drainage channels at the junctions to direct water flow; installing prefabricated waterproof concrete collection wells in low-lying areas, forming a closed-loop waterproof system with foundation brick formwork and flexible waterproof membrane; and finally, constructing crushed stone drainage blind paths along the surrounding wall foundations and backfilling. This invention achieves continuous, all-weather, non-powered water control, ensuring the stability of the foundation pit slopes and zero leakage in the main structure. This invention is mainly applied to the construction of buildings in pebble-rich water-bearing areas.

The utility model belongs to brine resource comprehensive utilization technical field especially relates to a kind of calcium type brine acid method extraction bromine system, it is by acidification blowing bromine unit, absorption desulfurization unit and bromine evaporation unit composition bromine element separation purification system;The absorption desulfurization unit is by primary defoaming module, absorption module, caustic wash module and secondary defoaming module composition gas and solution's recycling system;The defoaming structure in primary defoaming module, secondary defoaming module is one or two combinations in multilayer wire mesh defoaming structure, multistage baffle defoaming structure.The utility model first proposes "two-stage defoaming-two-stage absorption-gas circulation" synergistic technology, can effectively prevent calcium sulfate precipitation formation, improve production continuity;Efficient absorption and recycling sulfur dioxide, reduce cost;Promote bromine extraction efficiency and purity, reduce waste gas emission, with economic benefit and environmental benefit.

The utility model discloses an anti-blocking sewage pump which can synchronously act with the running rhythm of a diaphragm pump under the control of a driving assembly through two groups of plungers arranged in a pump body. When the diaphragm pump sucks water, the driving assembly ensures that one group of plungers opens the water inlet and closes the water outlet at the same time, so that external impurities can be effectively prevented from flowing back into the pump cylinder in the water sucking process, more sewage can be sucked in, and in the drainage stage, the other group of plungers opens the water outlet at proper time to ensure that the sewage is discharged smoothly, so that the service life of the diaphragm pump is prolonged. Meanwhile, the water inlet is closed, and backflow or invasion of external substances caused by pressure fluctuation in the drainage process is prevented. Through the design, a water inlet channel and a water outlet channel can be always kept unobstructed in the operation process of the pump, so that the risk of blockage is greatly reduced, the service life of equipment is prolonged, and an efficient and reliable solution is provided for sewage treatment under various complex working conditions.

The present invention relates to the technical field of laminated filters, and in particular to a filter laminate and a filter. The filter laminate provided by the present invention comprises: a laminate body, a plurality of flow guides and a flow channel structure. The flow guides are distributed in an array on the laminate body along a first direction and a second direction, and are arranged along the surface protrusions of the laminate body, and two adjacent flow guides are arranged at intervals; the shortest distance between two adjacent flow guides in the second direction is a first spacing, and the shortest distance between two adjacent flow guides in the second direction of the next group in the first direction is a second spacing, and the first spacing is greater than the second spacing; the flow channel structure comprises a plurality of first flow channels and a plurality of second flow channels arranged in an alternating manner, the first flow channel is extended along the first direction and arranged between two adjacent flow guides in the second direction, and the second flow channel is extended along the second direction and arranged between two adjacent flow guides along the first direction, thereby improving the filtering efficiency of the filter laminate.

The present application relates to the industrial waste gas treatment technical field, disclose the heat accumulation type thermal incinerator waste gas treatment material and preparation method thereof of anti silicon blockage, the material is made of kaolin, talc, calcined alumina matrix and pre-synthesized magnesium stabilized aluminum titanate clinker, monoclinic zirconium oxide, lithium feldspar modifier, the preparation method includes: the raw material is made into dry powder mixture, water ball milling pressure filtration is used to prepare mud cake, the plastic mud section is prepared by adding organic additives vacuum mud preparation; Extrusion molding is honeycomb green body with 10-13 cpsi of hole density and 1.4-1.6mm of wall thickness; Sintering at 1390-1410 DEG C, then quenching at 1100 DEG C to 700 DEG C interval control 5-8 DEG C / min rate. The present application uses the chemical inertia of monoclinic zirconium oxide to block silicon corrosion, and lithium feldspar promotes surface densification, combined with clinker and matrix thermal expansion mismatch and quenching process induced microcrack toughening, solves the problem of channel blockage and thermal shock cracking of heat accumulator under the working condition of waste gas containing silicon.

The invention discloses a compressor shell structure and a compressor cooling system, and relates to the field of compressor structures and cooling, the compressor shell structure comprises a shell body outside a compressor, and the upper portion and the lower portion of the shell body are provided with an upper cover and a lower cover respectively; cooling channels are formed between the upper cover and the machine shell body and between the lower cover and the machine shell body respectively, the internal structure of each cooling channel is of a snakelike groove structure, a compressor inlet and a compressor outlet are formed in the machine shell body, and cooling inlets and cooling outlets of the cooling channels are formed in the upper cover and the lower cover respectively. The upper part and the lower part of the casing body are respectively provided with the cooling channels of the snakelike grooves capable of circulating the cooling liquid, so that the anti-blocking performance of the casing is improved, the structure can be directly arranged in the casing structure, the purpose of ensuring the cooling effect can be achieved, and the purpose of preventing blockage after scaling to lose the cooling effect can also be achieved.

The application relates to the technical field of waste gas treatment, and discloses a VOCs waste gas treatment device and method for memory strip processing, wherein the VOCs waste gas treatment device for memory strip processing comprises a purification tower, an input pipe arranged below the outer side of the purification tower, a clean input pipe arranged above the outer side of the purification tower, a clean output pipe arranged at the bottom of the purification tower, an adsorption assembly arranged in the purification tower, and a cleaning auxiliary assembly. The VOCs waste gas treatment device for memory strip processing is provided with the cleaning auxiliary assembly, hot air flows through the air vent first during desorption, then passes through the activated carbon plate, impurities adsorbed previously are purified, meanwhile, the open air vent slides on the surface of the activated carbon plate in sequence, full coverage of the activated carbon plate is realized, the hot air can uniformly flow through each part of the activated carbon plate, full desorption is realized, and the hot air is prevented from preferentially flowing through the part with smoother flow, so that the desorption effect of the part with serious blockage is reduced.

The invention discloses a drain board adopting a regenerated plastic composite core board and a preparation method of the drain board, and belongs to the technical field of drain boards. The drainage plate comprises a regenerated plastic composite core plate, a filter membrane, a reinforcing sleeve and a splicing structure. The core plate takes regenerated polypropylene as a base material, glass fiber powder and a compatilizer are added to enhance the performance, and a trapezoidal drainage channel is arranged to improve the compression resistance and drainage stability. The filter membrane is made of regenerated polyester non-woven fabric and is mechanically meshed with the core plate through a needling composite process. According to the invention, high-value utilization of waste plastic is realized, the production cost is remarkably reduced, excellent mechanical properties and drainage stability are ensured, and the composite material is suitable for projects such as roadbeds, gardens, building foundation pits and the like.

The utility model discloses a kind of double-outlet bifurcated labyrinth flow passage irrigator, including the water inlet pipe being connected with drip irrigation pipe, the water inlet pipe is connected with the water inlet of irrigator body, the water inlet output end both sides are respectively connected with a bifurcated labyrinth flow passage input end, the bifurcated labyrinth flow passage output end is connected with water outlet pipe through water outlet;The flow passage of the utility model's irrigator is bifurcated labyrinth flow passage, hydraulic performance is excellent, with pressure compensation performance, flow passage is divided into main flow passage and bifurcated flow passage, anti-blocking performance is better, and irrigator is provided with left and right two water outlets, can simultaneously irrigate two rows of crops;Secondly, irrigator structure is simple, convenient to prepare, low in cost, it is convenient for large-scale production, more suitable for large area, long distance drip irrigation operation.

The utility model discloses a post-treatment catalytic silencer which comprises a catalytic silencer body, a nozzle, an injection pipe, a cooling liquid inlet pipe and a cooling liquid return pipe. One end of the nozzle is mounted on the catalytic silencer body and faces the interior of the catalytic silencer body; one end of the injection pipe is connected with the other end of the nozzle, and the other end of the injection pipe is used for being connected with an injection pump; one end of the cooling liquid inlet pipe is connected with the other end of the nozzle, and the other end of the cooling liquid inlet pipe is used for being connected with a cooling liquid supply mechanism; one end of the cooling liquid return pipe is connected with the other end of the nozzle, and the other end of the cooling liquid return pipe is used for being connected with the cooling liquid supply mechanism. Therefore, the after-treatment catalytic silencer is simple and reasonable in structure, a whole vehicle can be conveniently connected with a pipeline, the anti-blocking capacity of the nozzle is improved, and the risk of urea crystallization is reduced.

The utility model relates to the technical field of paving devices, in particular to a modularized combined type permeable paving device which comprises a permeable paving frame, the inner wall of the permeable paving frame is fixedly connected with two partition plates which are arranged in a crossed mode, and two symmetrical grooves are formed in the top face of the permeable paving frame. The permeable paving device has the advantages that through the collaborative design of the metal filter screen and the groove, the problem that traditional permeable paving is easy to block due to impurities is effectively solved. The metal filter screen is installed at the top of the permeable paving frame in an embedded mode, and large impurities such as fallen leaves and silt can be effectively intercepted and prevented from entering the groove. A plurality of independent filtering areas are formed by the cross structures of the partition plates, so that even if a local filter screen is blocked, other areas can still keep a normal drainage function. Through the communication design of the drainage holes and the grooves, it is ensured that filtered rainwater can be rapidly drained, the anti-blocking capacity of the paving device is remarkably improved through the multi-layer filtering system, and the maintenance period of the system is prolonged.

The invention discloses a composite permeable reactive barrier material based on a lanthanum-iron-magnesium-aluminum modified silicon-based porous medium and application of the composite permeable reactive barrier material, and relates to the technical field of environmental restoration. A composite permeable reactive barrier material based on a lanthanum-iron-magnesium-aluminum modified silicon-based porous medium comprises a reactive medium filled in a permeable reactive barrier, the reactive medium is composed of a phosphorus removal material, a heavy metal curing material and a microbial activator, and the surface of each component is coated with a slow release layer; wherein the phosphorus removal material is a silicon-based porous medium modified by lanthanum, iron, magnesium and aluminum elements. Compared with the prior art, according to the prepared composite reactive barrier system, through the synergistic effect of multi-component materials, phosphorus, heavy metal and organic matter in underground water are efficiently and synchronously removed, and the problems that a traditional medium is single in remediation target and prone to blockage are solved. Due to the specific design of the slow-release layer, the structural stability and the long-term effect of the material are remarkably enhanced, and the microbial activity and the extremely high pollutant removal efficiency can still be maintained in a low-temperature environment.

The utility model relates to the field of electromagnetic valves, and discloses an anti-blocking electromagnetic valve element assembly which comprises a valve rod and a first connecting ring, a threaded rod is fixedly installed at the bottom end of the valve rod, the center of the threaded rod and the center of the valve rod are located on the same straight line, and a plurality of fixing rings are fixedly connected to the surface of the valve rod; a plurality of water flow channels and connecting ports are formed in the surface of the valve rod, a second connecting ring is slidably mounted at one end of the first connecting ring, a mounting frame is clamped to one end of the first connecting ring and one end of the second connecting ring, and a shielding net is fixedly connected to the inner wall of the mounting frame; the first connecting ring and the second connecting ring are mounted on the surface of the valve rod, the mounting frame is clamped to one end of the first connecting ring and one end of the second connecting ring, and the shielding net is mounted on the inner wall of the mounting frame, so that water flow entering the fixing ring is filtered by means of the shielding net, and the anti-blocking capacity of the valve element assembly is effectively improved.