268results about How to "Not easy to cause blockage" patented technology

The grating type pneumatic triphase fluidizing comprehensive absorption tower includes one housing, one gas inlet channel and gas outlet channel in the top of the tower, one rotary defogging and dewatering unit, one stuffing assembly comprising support boards, hold-down boards and stuffing, one coaxial tubular grating member, one liquid distributor with ring sprinkler pipe, one large caliber reverse sprayer inside the gas inlet channel, and one absorbing slurry pond in the bottom of the tower. It features the special grating structure, the regularly arranged stuffing for cyclic fluidizing, the combined foam absorption and stuffing absorption, etc, and has high absorption efficiency, great gas treating amount and other advantages.

The invention discloses a compound vertical flow artificial wetland oxygen increasing system. The system consists of an air compressor, a compound vertical flow artificial wetland, a downlink flow pool and an uplink flow pool; the downlink flow pool which is communicated with the bottom and the uplink flow pool form a compound vertical flow artificial wetland, the bottom of which is provided with at least three emptying tubes which are connected in parallel; the walls of the emptying tubes are provided with through holes; the emptying tubes at the bottom of the downlink flow pool are internally and respectively provided with perforated aeration tubes which are connected in parallel; and one end of the perforated aeration tube is closed, and the other end thereof is connected with an airway which is connected with the air compressor of the ground surface. The invention has simple structure and is provided with emptying tubes at the bottom of the compound vertical flow artificial wetland, conducts intermittent aeration in the emptying tubes at the bottom of the downlink flow tool on the optimized oxygen increasing condition, creates an environment condition of aerobic and anaerobic alternate change which is required by the nitrification and denitrification reactions, and greatly enhances the denitrification effect.

The invention discloses a lightweight slow-release nitrogen and phosphorus removal material and a preparation method and application thereof, and belongs to the field of environment function materialsand sewage treatment. The preparation method comprises the following steps: uniformly mixing cement, pyrite, a foaming agent and a foam stabilizer to obtain dry-mixed mortar; adding water into the dry-mixed mortar, and stirring to prepare the lightweight slow-release nitrogen and phosphorus removal material. The lightweight slow-release nitrogen and phosphorus removal material of the invention has characteristics of high specific surface area, controllable density, high reactivity, easy microbial biofilm formation, slow-release electron donor nitrogen-removal and iron ion phosphorus-removal,etc., can be used as a filling material for sewage treatment fluidized beds and fixed beds, a filling materials for constructed wetlands and in-situ and ex-situ purifying material for polluted water bodies, and has a good purifying effect on pollutants in water, especially on total nitrogen and total phosphorus.

The invention relates to an evaporation technique for liquid sulfur trioxide and belongs to the technical field of chemical industry production. The invention aims to provide an improvement of an evaporation technique for liquid sulfur trioxide, and the working procedure has the characteristics of reasonable technological process and safe production and can fully utilize waste heat of various tail gases. The technique of the invention has the technical scheme that the liquid sulfur trioxide flows through a first pipeline between a liquid sulfur trioxide storage tank and a sulfur trioxide evaporator and is quantitively conveyed to the upper part of the sulfur trioxide evaporator, so that the liquid sulfur trioxide flows down along with a filling material through a distributor in an evaporation mixer; dry gas conveyed through a second pipeline enters the lower part of the sulfur trioxide evaporator after being orderly pressurized and heated, so that the dry gas rises in the sulfur trioxide evaporator and meets the liquid sulfur trioxide in reverse directions, and the liquid sulfur trioxide is evaporated by heating and diluted into gas with certain concentration; and the produced sulfur trioxide gas flows in a cooler through a third pipeline to be cooled, and is absorbed by an absorption tower for later use.

The present invention relates to a sand-proof integrated composite screen pipe and its production method. Said method includes the following several steps: rolling up the sheet with flow-passing holes to obtain cylindrical form, welding and forming to obtain internal and external protective covers; then rolling up the sand-proof filter screen into cylindrical form, and placing the cylindrical filter screen into the above-mentioned external protective cover interior one-layer-by-one-layer, then placing the internal protective cover into the interior of external protective cover, expanding inner hole of internal protective cover to tightly press said several layers of sand-proof filter-screen so as to form integrated filter unit composite sleeve, then making said integrated filter unit composite sleeve be cover-mounted on the central base pipe with several flow-passing holes, using supporting disks to respectively weld two ends of said integrated filter unit composite sleeve and central base pipe so as to obtain the invented sand-proof integrated composite screen pipe.

The invention discloses a preparation method of magnesium-based high-sulfur free-cutting steel. The magnesium-based high-sulfur free-cutting steel comprises the following chemical components in percentage by mass: 0.05-0.50% of C, less than or equal to 0.40% of Si, 1.0-1.7% of Mn, less than or equal to 0.08% of P, 0.15-0.35% of S, 0.0003-0.0020% of Mg, less than 0.0030% of O and the balance of iron and inevitable impurities. A production process comprises the steps of converter or electric furnace smelting, LF refining, continuous casting and rolling, magnesium-containing cored wires are addedat the final stage of refining, the degree of superheat is controlled before wire feeding, the total oxygen content is not higher than 30 ppm, and an intermittent feeding method is adopted. The wirefeeding process is stable, violent splashing is avoided, and the yield of the magnesium element is higher. The product prepared by the preparation method has excellent cutting performance and remarkably improved cutting breaking performance and the abrasion resistance of cutters. The cost of each ton of steel is increased by not more than 10 yuan, and the price advantage is obvious.

The invention provides an automatic filter sieve device and belongs to the field of mechanical equipment. The automatic filter sieve device comprises a filter sieve body, a stock bin and an installation frame. The filter sieve body is provided with a hopper and a discharge groove communicated with the hopper. The filter sieve body and the stock bin are installed on the installation frame, and the stock bin is located below the discharge groove and used for receiving materials flowing out of the discharge groove. The bottom of the stock bin is provided with a discharge outlet where a switch is installed. The switch is used for controlling the discharge outlet to be opened and closed. When the automatic filter sieve device is used for filtering raw materials, the filtered raw materials can be stored in the stock bin so as to be taken and stored conveniently without affecting normal work of the filter sieve.

The invention discloses a vertical flow artificial wetland aerobic denitrification system for intermittent operation. The system comprises an automatic oxygenation system which is connected with a master intake pipe through a water pump. The automatic oxygenation system is characterized by comprising a spray water distributor, wherein the spray water distributor comprises an atomizer and is connected with a water pump; the spray water distributor is horizontally arranged above the vertical flow artificial wetland; porous gas filled tubes and denitrification exhaust pipes, which are uniformly distributed and vertically arranged, are arranged inside the vertical flow artificial wetland; the bottom of the vertical flow artificial wetland is connected with a master drain pipe. An oxygen-enriched environment is provided for a nitrification region at the middle part and the upper part of the wetland through a group of gas filled tubes which are vertically inserted into the artificial wetland; the contact time and the contact area of inflow water and atmosphere are increased through the spray water distributor so as to form oxygen-enriched inflow water; wetland nitrification and denitrification are enhanced; denitrification gas in the denitrification region can be quickly discharged in the water supply process by controlling a switch at the upper end of each denitrification exhaust pipe; wetland denitrification and nitrogen removal are enhanced, and the denitrification effect of the vertical flow artificial wetland is greatly improved.

The invention provides a packing medium for a permeable reactive barrier and application of the packing medium to an aspect of in-situ treatment on underground water nitrate pollution, and a method thereof. The packing medium is formed by evenly mixing polyhydroxyalkanoate and ceramsite with the grain sizes of 4-6.5mm and 5-8mm respectively according to a ratio; raw material components of the packing medium are simple, and simple and easy to obtain. The invention also provides the application of the packing medium to an aspect of treatment on underground water nitrate pollution, in particular to the application to an aspect of in-situ treatment on underground water nitrate pollution. In addition, the invention also provides a method for in situ removal of underground water nitrate pollutants; the method takes a mixture of the polyhydroxyalkanoate and the ceramsite as the packing medium for the permeable reactive barrier. The method has the advantages of being simple and practicable, low in cost, long in service life, and small in secondary pollution, not easily causing aquifer blocking, and the like.

The invention relates to a sewage treatment device. The sewage treatment device comprises a treatment cavity, wherein a rotary motor is arranged on the outer side of the treatment cavity and is connected with a cutting disc through a rotation shaft, the cutting disc is longitudinally arranged in the treatment cavity, the two ends of the cutting disc attach to the inner wall of the treatment cavity, and cutting edges are distributed in the cutting disc. The treatment cavity on the two sides of the cutting disc serve as a water inlet cavity and a water outlet cavity, a water inlet pipe is arranged on the side wall of the water inlet cavity, a water outlet pipe is arranged on the side wall of the water outlet cavity, the water inlet pipe and the water outlet pipe are oppositely arranged, and the disc diameter of the cutting disc is greater than the pipe diameters of the water inlet pipe and the water outlet pipe. A storage tank is arranged at the lower portion of the treatment cavity, and the treatment cavity is in spatial communication with the storage tank. The sewage treatment device utilizes power brought by the water pressure difference between the water inlet pipe and the water outlet pipe and the effects of the cutting edges formed in the cutting disc and the rotary force of the cutting disc to enable sewage to be directly layered in a sewage pipe in the sewage cutting and shattering process, directly cuts and shatters easily-treated sewage, improves the sewage treatment efficiency, ensures the sewage treatment effect and does not easily cause sewage blockage.

The invention discloses a preparation method and application of a sea cucumber-minced fillet compound material for 3D printing. The preparation method includes: using sea cucumbers and fish as the main raw materials, and performing fish raw material preprocessing, fish meat mincing, fish meat rinsing, fish meat dewatering, minced fillet making and compounding to obtain the sea cucumber-minced fillet compound material for 3D printing. The preparation method has the advantages that the sea cucumber-minced fillet gel system for 3D printing is significant to the development of 3D printing using sea cucumber-minced fillet as the raw material; sea cucumber paste is used as the main material to compound with the minced fillet, the thickness of the compounding raw materials can be adjusted favorably, and the printing shape after printing can be kept; nutritional substances in a raw material system can be enriched to balance nutrition; the product nutritional proportion can be improved by regulating raw material proportion according to the body needs of specific people, and the requirements of various consumers can be well satisfied.

The invention discloses a marine multifunctional micro-plastic collecting device comprising a coarse particle filter tube, a fine particle collecting tube and a tail tube, wherein the coarse particlefilter tube, the fine particle collecting tube and the tail tube are sequentially connected from front to back; a flow guide cover is arranged at the front end of the coarse particle filter tube, andthe coarse particle filter tube is arranged at an opening part of the flow guide cover; a coarse particle filter screen is fixed in the rear part of the coarse particle filter tube; flow guide rings are arranged in the coarse particle filter screen; the flow guide rings are of an annular structure; a central concave hole of the flow guide cover is aligned to the middles of the flow guide rings; the flow guide rings are of a streamline structure; a channel between the central concave hole of the flow guide cover and the front ends of the flow guide rings forms a venturi tube shape with two thick ends and the fine middle; a circular channel between the flow guide rings and a channel between the flow guide rings and a shell of the coarse particle collecting tube also form a venturi tube shape; a fine particle filter screen is arranged between the fine particle collecting tube and the tail tube; and a venturi tube shape with two thick ends and a thin middle is formed between the tail partof the fine particle collecting tube and the tail tube. According to the marine multifunctional micro-plastic collecting device in the invention, the micro-plastic rubbish in the lake and the ocean can be collected.

The invention relates to a drying cylinder stripping agent for papermaking and a preparation method thereof. The drying cylinder stripping agent comprises, by weight, 15-80 parts of alkane oil, 20-60parts of an oiliness agent, 5-50 parts of an emulsifier and 2-15 parts of an activator, wherein the oiliness agent is one or more of tall oil fatty acid, tall oil, erucic acid and hydroxyethyl imidazoline oleate, and the emulsifier is one or more of triethanolamine oleate soap, Tween 80, span 80, polyethylene glycol dioleate, polyethylene glycol monooleate and alkylphenol ethoxylates. The drying cylinder stripping agent can thoroughly solve the problem of cylinder sticking in papermaking, keeps a system clean, allows paper sheets to be free of oil spots, and achieves good stripping, lubricating and brightening effects.

The present invention provides a spray head of a dust catcher, which belongs to mechanical technique field.The method resolves the problem of the dust catcher with complicated structure of the spray head, non-uniform water spray and easy jamming of the nozzle and so on.The spray head of the dust catcher includes a cylindraceous head body, a penetrative water-through straight hole in the side wall of the head body, a penetrative nozzle in the bottom of the head body, and the axial line of the water-through straight hole is situated at side of the axial line of the head body.Because both the inlet straight hole and the nozzle have eccentric center structure, so water in the inner cavity of the nozzle body is rotating, and mist grain of water ejected from the nozzle is small for absorbing dust and solid particles fully, therefore the spray head has good effect for removing dust, in addition the spray head is not easily jammed because the nozzle is bigger.

The invention discloses a down-draft biomass fuel gasification furnace which belongs to the technical field of stoves. The down-draft biomass fuel gasification furnace comprises a gasification furnace body which is provided with a hearth and a fire grate at the bottom of the hearth, wherein a gas outlet cavity is formed between the inner wall of the gasification furnace body and the outer wall ofthe hearth; the hearth is provided with a drying region, a cracking region, an oxidation region and a reducing region from top to bottom; a gas outlet pipe, a gas guide mechanism and a carbon monoxide gas filtering mechanism which is used for filtering carbon monoxide gas and guiding the carbon monoxide gas to a combustor for combustion are arranged; one end of the gas outlet pipe is connected with the gasification furnace body and is communicated with the gas outlet cavity, and the other end of the gas outlet pipe is connected with the gas guide mechanism; and the gas guide mechanism is connected with the carbon monoxide gas filtering mechanism through a pipeline. The gasification furnace has the characteristic that: the internal diameter of the hearth is reduced to be less than the internal diameters of both the cracking region and the reducing region on the part corresponding to the oxidation region. The gasification furnace has the advantages of contributing to fully reducing the carbon dioxide gas into carbon monoxide gas, improving the purity of the carbon monoxide gas and preventing the hidden trouble of explosion of the gasification furnace body in case of backfire.

The invention relates to a thread engagement type double-layer combined dedusting cloth bag. The cloth bag comprises an outer bag and an inner bag, wherein the outer bag comprises outer dedusting cloth, an outer frame and an outer retaining ring; the inner bag comprises inner dedusting cloth, an inner frame, an inner retaining ring, a vibrating motor, an electric dedusting grid, a pulse back flushing spray head, a bottom plate, and a motor hood, wherein the electric dedusting grid is arranged at the upper part of the inner bag, the pulse back flushing spray head is arranged in the center of the electric dedusting grid, the bottom plate of the inner bag is arranged on the bottom part of the inner bag, the vibrating motor is arranged on the bottom plate, and the inner bag and the outer bag are connected by using thread engagement. The head engagement type double-layer combined dedusting cloth bag adopts the combined filtering of the double-layer cloth bag and electric dedusting, has the extremely better filtering effect than that of existing dedusting cloth bags, and has the relatively high dedusting capacity due to the combination of pulse air flow and vibration.

The invention provides a portable multifunctional environmental sanitation sweeping device which comprises a control chamber, a dust suction pump, a dust suction pipe, a filter device, a water tank, a dustbin, a green belt trimming device, a pipeline dredging device, a cleaning device, a trolley, a dust suction hood, a dust suction lifting cylinder, a water spraying opening, a water pipe, a water pump and wheels. The wheels are installed on the left and right sides of the lower portion of the trolley respectively. The control chamber is arranged at the upper left portion of the trolley. The pipeline dredging device is installed on the right side of the trolley through a bolt; the green belt trimming device is installed at the right portion of the upper side of the trolley through a bolt. By arranging a purification layer and a screen net, secondary use of cleaning sewage is achieved, the water resource utilization rate is increased, and water pollution is reduced; by arranging a trimmer, the trimming effect is good, and the green belt trimming efficiency is improved; by arranging the belt, the transmission effect is good, overload protection can be achieved, a power motor is not likely to be damaged, use is more convenient, and the device is convenient to use and popularize.