11results about How to "Reduce white pollution" patented technology

The seedling transplanting device for afforestation comprises a first covering plate and a second covering plate, a first inner check ring and a second inner check ring which are used for surrounding the periphery of a seedling are arranged in the middle of a disc structure formed by the first covering plate and the second covering plate, the first inner check ring is fixedly connected with the first covering plate, and the second inner check ring is fixedly connected with the second covering plate. The first inner check ring is fixedly connected with the first covering plate, the second inner check ring is fixedly connected with the second covering plate, a first outer check ring is fixed to the upper surface of the first covering plate, the first outer check ring and the first inner check ring are concentrically arranged, a second outer check ring is fixed to the upper surface of the second covering plate, and the second outer check ring and the second inner check ring are concentrically arranged. A plurality of first water leakage holes are evenly formed in the upper surface of the first covering plate, a plurality of second water leakage holes are evenly formed in the upper surface of the second covering plate, and the water supplementing device has the advantages that under the condition that the temperature and humidity of the roots of nursery stocks are maintained, water supplementing around the roots of the nursery stocks is not affected, and the working efficiency of water supplementing is improved.

The invention provides a solvent-free polyurethane two-component adhesive for a single composite film. The solvent-free polyurethane two-component adhesive comprises a component A and a component B, the component A is formed by carrying out first reaction on a first raw material system comprising polyisocyanate, first polyether polyol and a first hydroxyl-terminated polymer; the component B is formed by carrying out a second reaction on a second raw material system comprising polyester polyol with side groups, second polyether polyol, a second hydroxyl-terminated polymer and a coupling agent; the component A and the component B are compounded according to the molar ratio of functional groups-NCO to functional groups-OH being (1.8-2.5): 1. The solvent-free type polyurethane two-component adhesive has excellent peel strength; and the solvent-free polyurethane two-component adhesive does not contain a solvent, so that the interference of the solvent on the recovery process of the single-material composite membrane is avoided, and the white pollution is reduced.

The invention relates to a preparation method of a composite material, in particular to a preparation method of an optimized PLA / PBS (polylactic acid / poly (butylene succinate) / PBS (polybutylene succinate) composite material based on an interface strengthening compatibilization reaction, which is characterized in that dried PLA, PBS, a high-efficiency compatilizer, an initiator and an antioxidant are subjected to melt blending through a twin-screw extruder to prepare the PLA-based composite material. Epoxy groups in the used high-efficiency compatilizer can react with terminal hydroxyl groups in a PLA / PBS blending system to regulate and control microstructures of PLA and PBS systems, so that the compatibility between PLA and PBS is effectively improved. The process is simple and convenient to operate, and compared with a pure PLA / PBS blend, the obtained modified blend shows excellent impact strength, elongation at break and light transmittance, is easy for industrial large-scale production, and has good economic benefits and wide application prospects.

This invention relates to a method for preparing polylactic acid (PLA) by straw fermentation coupled with lactide ring-opening polymerization, belonging to the field of biomass resource utilization and bio-based polymer materials technology. To address the problems of high energy consumption and low sugar conversion rate in existing PLA preparation methods using crop straw, this invention provides a method for preparing PLA by straw fermentation coupled with lactide ring-opening polymerization. The method involves crushing the straw, pre-treating it with dilute acid coupled with steam explosion, washing and drying it, adding a complex cellulase and Lactobacillus pentosus LB-1 seed culture, and simultaneously saccharifying and fermenting under controlled temperature and pH to obtain a lactic acid fermentation broth. The fermentation broth undergoes multi-stage filtration, ion exchange, and concentration to obtain refined lactic acid, which is then prepolymerized, depolymerized, and distilled to obtain L-lactide. After purification, an initiator and antioxidant are added, and ring-opening polymerization, extraction, and drying are performed under nitrogen protection to obtain pure PLA. This invention features efficient and low-energy straw pretreatment, high sugar-acid conversion rate during fermentation, precise purification, stable polymerization, and low cost, making it a green and economical method using straw as raw material.

The invention discloses a microfiller for culturing sewage treatment aerobic granular sludge and a preparation method of the microfiller, belongs to the technical field of sewage treatment, and relates to the microfiller for culturing the sewage treatment aerobic granular sludge. The invention aims to solve the problems of long granulation time and poor stability in the prior art. The microfiller for culturing the aerobic granular sludge for sewage treatment is prepared by uniformly mixing one or more of straw powder, beneficial metal salt and red mud with plastic particles, heating, melting and granulating to obtain fine particles rich in organic matters, and aging the fine particles rich in organic matters by ultraviolet light. According to the microfiller disclosed by the invention, an internal core of the aerobic granular sludge is formed in a form of rapid colonization of microorganisms, and a novel aerobic granular sludge system with a stable core is formed through induction, so that the bottleneck problems of long granulation time (2-5 months) and poor stability existing in an aerobic granular sludge technology at present are solved.

The utility model relates to a device for pre-burying a lifting lug. The device comprises a connecting assembly, comprising a first connecting piece and a second connecting piece which are oppositely arranged; a clamping assembly; the clamping assembly is fixedly arranged at the bottom of the connecting assembly and comprises a first clamping plate and a second clamping plate; one ends of the first clamping plate and the second clamping plate are rotationally connected through a hinge device, and the other ends are suitable for clamping lifting lugs; a link device; the driving assembly is assembled between the first connecting piece and the second connecting piece and used for driving the first clamping plate and the second clamping plate to be opened or closed; the device is ingenious in design, is used for quickly and safely pre-burying the lifting lug, can perfectly replace traditional pearl wool or foam, provides a lifting space for a hook, is durable, can be used for multiple times, is simple to operate and is light and convenient, and the surface of a pit taken out after the lifting lug is pre-buried is smooth and attractive, so that the working efficiency is improved, and the labor intensity of workers is reduced. And the labor cost is reduced.

The utility model provides a kind of HNSPS low energy consumption external wall external thermal insulation system, it is related to external wall thermal insulation technical field, including base wall, adhesive layer, thermal insulation layer and protective layer;Base wall includes concrete wall or masonry wall;Adhesive layer includes bonding mortar and anchor bolt, bonding mortar is located base wall outside;Thermal insulation layer is HNSPS insulation board, thermal insulation layer is located between adhesive layer and the protective layer of outermost layer.The utility model has the beneficial effects of: reasonable in design, simple structure, safe and reliable, improve the fire performance of system, reduce the fire occurrence in the use process of the product.

The present invention relates to the technical field of polymer composite materials, and discloses an asphalt pavement anti-rutting modifier and its preparation method and application, which is composed of the following raw materials in parts by weight: 100 parts of carbon nanotube-loaded basalt fiber hybrid, 20-50 parts of organic wax warm mix, 0.5-1 parts of dispersant, and 0.5-1 parts of antioxidant: step one, basalt fiber degumming: putting basalt fiber into a heating furnace, heating to 300°C, keeping warm for 1h, and removing its surface impregnant; step two, preparation of catalyst-loaded basalt fiber; step three, preparation of carbon nanotube-loaded basalt fiber hybrid. The basalt fiber in the asphalt pavement anti-rutting modifier provided by the present invention has a high specific surface area, has a high temperature resistance effect on asphalt, and the interconnection between carbon nanotubes can construct a three-dimensional network in asphalt, improve the interface compatibility between basalt fiber and asphalt matrix, and improve the high temperature anti-rutting performance and permanent deformation resistance of the modified asphalt composite material.

The application provides a residual film recycling machine and belongs to the technical field of agricultural land preparation machinery. The machine comprises a main frame body, a first support frame is installed at the bottom of one side of the main frame body, spring bodies are installed at the top of both sides of the first support frame, and an electric telescopic rod is installed at the bottom of the first support frame. The soil loosening and stem collecting mechanism and the stem conveying and soil vibrating mechanism are arranged. The soil loosening and stem collecting mechanism can be used to quickly collect the stems and leaves of high-ridge crops such as strawberries after the fruits are harvested when the land is prepared in high-ridge fields. Meanwhile, the soil covering the residual film on both sides of the residual film is loosened, which provides convenience for the subsequent residual film recycling operation. The stem conveying and soil vibrating mechanism conveys the stems and leaves to the top of the device after the stems and leaves are collected, and the stems and leaves are effectively separated from the soil residues by means of the vibration generated by the movement of the device during the conveying process.

The utility model provides a transplanting cup, and relates to the technical field of tobacco planting. The transplanting cup comprises a first cup body and a second cup body, and the first cup body is cylindrical; the second cup body movably covers the upper end of the first cup body; wherein the first cup body and the second cup body are matched to form a protection space, the protection space has an adjusting state and a protection state, when the protection space is in the protection state, the second cup body completely covers the upper end of the first cup body, and the second cup body is moved so that the protection space can be switched to the adjusting state from the protection state. According to the transplanting cup, on the premise that the tobacco seedling protection effect is guaranteed, the requirements of the tobacco seedlings for temperature and humidity in different growth stages, different environments and different weather states are met adaptively.

The utility model provides a kind of agricultural special grass-preventing cloth of PET flat yarn, it relates to grass-preventing cloth technical field, including grass-preventing cloth main part, grass-preventing cloth main part from top to bottom including waterproof heat preservation layer, woven cloth layer, slow-release layer and waterproof flow drip layer, the flat yarn woven from the flat yarn made of recycled PET bottle piece of woven cloth layer. The first side and the third side of grass-preventing cloth main part are evenly provided with fixed rope, fixed block and sealing sleeve, the fixed block side is equipped with the slot, the slot inside one side wall is fixedly connected with elastic clamping block, the sealing sleeve inside sleeve joint has the mouth rope. The flat yarn made of recycled PET bottle piece is used for weaving the woven cloth layer of grass-preventing cloth, so that the grass-preventing cloth produced has the ultraviolet resistance, antioxidant property of PET material, and mechanical strength is superior to PP, simultaneously without chemical additive, and tensile strength is high.