106results about How to "Not easy to wash away" patented technology

The invention discloses a self-cementing leaking stoppage agent and a leaking stoppage method. The self-cementing leaking stoppage agent is prepared from the following ingredients in percentage by mass: 25 to 35 percent of acrylamide monomers, 0.1 to 0.5 percent of cross-linking agents, 0.2 to 0.5 percent of sodium carbonate, 20 to 25 percent of bentonite, 2 to 5 percent of high-molecular polymers, 3 to 5 percent of pre-cross-linking gel particles, 30 to 35 percent of fine-mesh calcium carbonate, 5 to 8 percent of fiber and 0.1 to 0.5 percent of initiators; the raw materials are uniformly mixed, and the self-cementing leaking stoppage agent is obtained. The self-cementing leaking stoppage agent has the advantages that the formation temperature is used, so that a polymerization reaction is taken among molecules; a rubber plug with certain water absorption expansion performance and compressive strength is formed, so that a leakage layer is blocked.

The invention relates to a microbe dredging agent. A porous zeolite is employed as a carrier; and mixed bacteria of actinomycetes, nitrosomonas eutropha, nitrobacter winogradskyi, paracoccus pantotrophus and bacillus megaterium, in a certain proportion, are used as dredging bacteria. The five specific dredging bacteria form a ''cell family'', which, through mutual conversion metabolism, not only can play a role of water purification in an oxygen-rich water area, but also can play a role of biological decomposition and conversion in a low-oxygen even anoxic environment (e.g. water-bed mud) andsalty water area (e.g. gulf), so as to purify sewage and improve water quality. The invention employs a porous zeolite with a high absorptivity as a fixed carrier of the dredging bacteria, so that the dredging bacteria are more firmly fixed and not easily flushed by water; because the zeolite is apt to sinking, the microbe dredging agent of the invention is especially suitable for water-bed dredging of river and lake, etc. In addition, the preparation method of the microbe dredging agent of the invention has mild conditions, a simple technology and advantages of low production costs and benefit for popularization and application.

The invention discloses a resin type nanoparticle latex blocking agent for drilling fluids. The blocking agent comprises raw materials in parts by weight as follows: 20 parts of alkenyl benzene, 15 parts of acrylate, 1 part of acrylates and 10 parts of hard inorganic materials, wherein the mass ratio of short-chain monomers to long-chain monomers in acrylate monomers is 3:1. The blocking agent is a composite product of the inorganic materials and organic materials, combines the hard materials with soft materials, has a higher blocking rate and is wide in particle size distribution and wider in application range; the rheological property of the drilling fluids are seldom influenced after the blocking agent is added to the drilling fluids, the blocking capacity of the drilling fluids can be remarkably improved, and the filter loss of the drilling fluids is reduced.

The invention discloses a cement-polyurethane composite grouting process capable of blocking water fast. The cement-polyurethane composite grouting process includes the steps of a, performing engineering exploration, to be more specific, designing a plurality of holes after the optimal reaction positions of polyurethane grout are determined according to the stratum cracks or the flowability of flowing water, wherein the holes should communicate water leakage points as much as possible or penetrate a plurality of stratum cracks to allow one hole to penetrate multiple stratums; b, drilling; c, grouting, to be more specific, simultaneously and alternately grouting the polyurethane grout and cement grout into all holes, using the instant foaming and curing feature, which uses water to stop water, of the polyurethane grouted first to stop and block water, using the cement grout grouted later to stop the backflow of the polyurethane so as to form a structure with grouted holes and front blocking and back protection, and repeatedly and alternately grouting for multiple times until water burst is blocked; d, continuing grouting for a certain period of time after the water burst is blocked to guarantee that blocking is completed. By the arrangement, the cement-polyurethane composite grouting process is simple in procedures, capable of blocking water fast, and capable of integrating blocking and reinforcing.

The invention discloses a steel reinforcement cage used for flood fighting and emergency rescues. Four identical equilateral-triangle net frames are assembled into a regular tetrahedron, and borders of the equilateral-triangle net frames are formed by welding deformed steel bars; a steel bar net piece is welded between the borders of each equilateral-triangle net frame, lugs are welded to the borders of each equilateral-triangle net frame, and the borders are connected through bolts. The steel reinforcement cage can be directly thrown to the position above a breach of a dam when used for blocking the breached dam, and then stones and sandy soil are thrown; or stones and sandy soil can be placed into the steel reinforcement cage used for flood fighting and emergency rescues, then the steel reinforcement cage is thrown to the position above the breach of the dam, and then stones and sandy soil are thrown till the breach of the dam is blocked. Due to the fact that the regular tetrahedron structure is adopted, the steel reinforcement cage can be inserted into soil easily; the steel reinforcement cage has extremely good stability and is not prone to being washed away by flood water and capable of effectively blocking stones and sandy soil and blocking the breach of the dam rapidly.

The invention relates to the field of bioremediation of rivers, and in particular relates to a composite microbial preparation for watershed bioremediation as well as a preparation method and application thereof. The microbial preparation comprises active ingredients including bacillus natto, candida utilis and rhodopseudomonas palustris which are mixed together in a volume fraction ratio of 1:1:1; the microbes for water treatment are combined with zeolite to prepare a comprehensive preparation for water treatment; the specific gravity of the obtained comprehensive preparation for water treatment is greater than that of water, so that the obtained comprehensive preparation for water treatment quickly sinks to the bottom of water and can not be washed away by water flow easily; the zeolite is used as a carrier for the microbes to grow, and can provide certain nutrition substances required by growth for the microbes while adsorbing pollutants, and the microbes attached to the zeolite perform decomposition and anabolism on the pollutants to ensure that the zeolite restores the adsorptive property, so that a virtuous cyclic process is formed. The microbial agent provided by the invention can adapt to fresh water and seawater environments at the same time, and has an effective bioremediation effect on watercourses of certain coastal cities, wherein the water quality of the watercourses has fresh water and seawater alternating conditions along with seasonal changes.

The invention relates to a pressure-bearing lost circulation additive for a drilling fluid and for stably bearing pressure on a smooth fracture leakage wall surface. The lost circulation additive is composed of 10%-20% of damping material, 45%-50% of bridging material and 35%-40% of filling material by weight, wherein the damping material is an industrial metal screen, having the size of the damping material is 1.0*1.0mm to 3.0*3.0 mm and the thickness of the damping material is about 0.5 mm; the bridging material is calcium carbonate particles, and the standard mesh number of the screening mesh product of the bridging material is lower than 20 meshes; the filling material is a mixture composed of calcium carbonate powder and flexible graphite powder; the calcium carbonate powder is further divided into three grades to realize multi-grade filling and to form a compact shielding layer; and the mesh number of the flexible graphite is greater than 150, and the anti-pressure ability of a bridge plug section is improved. With the pressure-bearing lost circulation additive for the drilling fluid and for stably bearing pressure on the smooth fracture leakage wall surface disclosed by the invention, leak stoppage success rate and bearing pressure for smooth fracture leakage can be improved, leakage stoppage failure due to complexity is reduced, the benefits of exploring and developing a bored well are improved; and the preparation process of the lost circulation additive is simple and convenient, the source of the materials of the lost circulation additive is broad, and the lost circulation additive is easy to spread and apply.

The invention discloses a water heater comprising an outer casing and an inner container arranged in the outer casing and a thermal insulation layer positioned between the inner container and the outer casing; the water heater further comprises a controller and a display which is connected with the controller; a temperature sensor which is connected with the controller is arranged on the outer surface of the inner container which is close to one end of a heating pipe, and the temperature sensor transmits real-time measured temperature values to the controller. The invention provides the water heater, thereby facilitating the maintenance and the replacement of the temperature sensor in the water heater and being capable of accurately measuring water temperature of the water heater.

The invention discloses special fertilizer for oil-tea trees and a preparation method thereof. The special fertilizer is prepared from the following raw materials and components in parts by dry weight: 20-25 parts of cassava stem, 15-20 parts of bagasse, 30-50 parts of livestock and poultry manure, 5-6 parts of plant ash, 5-8 parts of fish bone meal, 4-6 parts of nitrogen-phosphorus-potassium compound fertilizer, 3-5 parts of calcium superphosphate, 1-2 parts of water-retaining agent and 0.5-1 part of microbial preparation. The special fertilizer for the oil-tea trees is prepared according toa process flow of raw-material pretreatment, initial material mixing, composting fermentation and decomposition, remixing and fertilizer granulation. The special fertilizer for the oil-tea trees is applied in a proper time and a proper amount according to the growth rules of oil tea, and has the advantages that the fertilizer efficiency of oil-tea planting is improved, the slow-release period of nutrients is prolonged, so that the quality and the oil yield of the oil tea are improved.

The invention belongs to the technical field of sewage treatment, discloses an ammonia nitrogen removal bacterium agent, and aims to provide an ammonia nitrogen removal bacterium agent which is high in ammonia nitrogen removal efficiency and can recycle bacterium removal agents and fillers. The technical scheme includes that compound bacterium agents are cured on the fillers and comprise heterotrophic nitrification bacteria, bacillus and denitrifying bacteria.

The invention discloses a garbage collection and processing equipment for lake and river channel treatment. The garbage collection and processing equipment includes floating plates and cross beams, the two ends of the cross beams are both connected with the floating plates, the bottoms of the floating plates are connected with counterweight net barrels, and load-bearing floating plates are connected to the ends, far away from the cross beams, of the bottoms of the floating plates. When an impeller rotates, garbage in water is turned upwards, the garbage can be attached to the side faces of a net frame, and subsequent collection is facilitated. The garbage on the side face of the net frame can be scraped away by a net plate, the garbage can be treated in time, and meanwhile, the net frame can conduct normal filtering without being blocked. During rotation of the net plate, several cutting blades on the side face of the net plate cut and crush the garbage, the size of the garbage is reduced, transportation of the net plate and storage of a storage box are facilitated, and the occupied space is saved. The width of the river channel or the lake surface is too large, multiple interception devices can be installed according to the actual situation, the multiple cross beams can be used in cooperation to improve the garbage removing efficiency, and dead spots for cleaning are not proneto being left.

The invention relates to a flood-fighting special bag, able to be used to fill and close up dike breach and piping place and also to be used as temporary reinforcing sub-dike for a weaker dike in flood seasons, and having good filling and closing effect and also able to be used as emergency lifeboat, and comprising a material storage bag in the middle to carry closing fillings and an air bag on two sides of the material storage bag to expand after charged, where the material storage bag and air bag are made of flexible waterproof material, the upper side of the material storage bag is provided with a feed inlet / outlet able to be opened and closed, and the outside of the storage bag is provided with a fixed rope; and the air bag is provided with an air inlet. As the flood falls, it only needs to discharge the air from the air bag and pour out the fillings, so as to be able to be recovered, convenient to recover and save manpower, material resources, and financial resources, especially able to race against the most valuable time for food fighting and relief providing.

The invention discloses a constant-temperature patch clamp cell recording system which comprises a cell operating table, a cell recording tank, a perfusion device, a constant-temperature dish, a constant-temperature column and a constant-temperature machine, wherein the cell recording tank is arranged on the cell operating table; the perfusion device is connected to the cell recording tank; the constant-temperature dish is matched with the cell recording tank; the constant-temperature column is at least arranged on the perfusion device; the constant-temperature machine is connected with the constant-temperature column and the constant-temperature dish. The constant-temperature patch clamp cell recording system disclosed by the invention has the benefits that as the constant-temperature column is arranged outside a perfusion tube, when a perfusate in the perfusion tube flows through a water holding chamber of the constant-temperature column, the heat is conducted through warm water in the water holding chamber, so that the perfusate in the perfusion tube meets the experiment temperature requirements; in the experiment process, by matching of a water bah of the constant-temperature dish and the cell recording tank, the temperature stabilities of a cell and a reagent in the experiment process are ensured in a water bath manner of circulating constant-temperature water in the cellexperiment process, ohmic heating is not required, and shapes of experimental square waves cannot be interfered, so that experimental data are more realistic, more accurate and more reliable.

The invention relates to a plant planting method for a boulder beach. The method at least includes the following steps that the species to be planted is selected; a planting season is selected; a vegetation restoration position is determined; soil preparation is carried out; planting is carried out; later maintenance is carried out. The method has the advantages that the species quickly roots through chemotropism of a root system, and roots firmly grasp a gravel and sand mixture under the roots, so that the ground holding performance of a plant is high, and continuous vegetation restoration is achieved; the structure of a planting hole is changed in the depth direction through excavation and landfill of the planting hole, gravel on the surface of the planting hole is the same as that of the original earth surface after landfill, it is avoided that turning causes upward moving of particulates in the excavation process, and the soil conservation function is extremely high; a U-type stone ridge protective band is arranged on the outer side of the planting hole to reduce impact on vegetations when flood peaks come and can intercept part of sand when water recedes, and the functions of vegetation protecting and deposition promotion promotion are achieved; according to the planting method, the proper local species suitable for growth is selected, measures are adjusted to local conditions, cost is low, and the vegetation coverage degree of a boulder beach area can be quickly increased.

The invention discloses an organic-inorganic composite water plugging reinforcement material and a preparation method thereof. The material consists of a component A and a component B, wherein the component A comprises the following ingredients by weight percent: 97-99% of water glass, 0.5-1.5% of a chain extension cross-linking agent, 0.2-0.6% of an organo-metallic catalyst, and 0.3-0.9% of an amine catalyst; the component B comprises the following ingredients by weight percent: 65-75% of crude MDI, 0-8% of PPG (polypropylene glycol)-2000, 2-10% of polyether triol 330N, 14-23% of a diluent and 1-2% of a foam stabilizer; the mass ratio of the component A to the component B is 1:(0.7-1.2). The preparation method comprises the following steps: mixing the ingredients of the component B according to the weight percent, leaving the mixture to stand for 12 hours, adding the component A, and uniformly stirring, so as to obtain the water plugging reinforcement material which is high in strength, good in environment friendliness and durability, non-flammable, and low in cost. According to the invention, the limitation problem that a polyurethane water plugging material can be used for reinforcement or plugging of a small amount of leakage water only.

The invention discloses a belt type roller magnetic separator. The belt type roller magnetic separator comprises a redirecting roller, a left machine frame, a conveying belt, a rain spraying gradient slurry dispersing sieve, a belt conveying bracket, a conveying belt lower carrier roller, an upper flusher, an electric roller and a right bracket and is characterized in that: a plurality of groove-shaped high-strength magnet carrier roller devices are arranged below the conveying belt on the upper layer. The high-strength magnet carrier roller devices can magnetize patterned belts completely above the devices, and iron powder in the slurry is sucked by the magnetized patterned belts and falls into pits of the patterned belts. After the patterned belts upstream enters a non-magnetic region, all the iron concentrate powder falls into an iron concentrate powder bank and are collected, so that the magnetic separation efficiency is greatly improved. The belt type roller magnetic separator has the advantages of large conveying quantity, high collecting capacity, capacity of reducing washing of slurry on the adsorbed iron powder, high magnetic separation efficiency, high yield, high iron powder adsorption capacity, resource saving, simple structure and easiness in assembly, and is ideal equipment for extracting iron concentrate powder through iron ore magnetic separation and tailings treatment.

The invention provides a detersive waterproof polishing car-washing solution to overcome the disadvantages of a single function, a great number of washing and waxing procedures and great consumption of time, labor, energy and water of traditional car-washing solutions. The detersive waterproof polishing car-washing solution provided by the invention is neutral, nonirritant to the skin, noncorrosive to the coating of a car and free of pollution to environment; after a car is washed by using the car-washing solution, a modified amino silicon oil film is tightly adhered on the surface of the body of the car, has water resistance and brightness and is not prone to yellowing under the action of ultraviolet light; and the detersive waterproof polishing car-washing solution is applicable to cars of various colors, including white cars.

The invention relates to a crevasse plugging system and plugging method. The crevasse plugging system comprises a hanging bridge used for being suspended above a crevasse; the hanging bridge is provided with a plurality of pile holes, and a stopping pile rod is arranged in each pile hole in a penetrating manner; the lower end of each stopping pile rod is used for being inserted into a riverbed ofthe crevasse; and the crevasse plugging system further comprises a water stopping piece abutting against the stopping pile rod in the flood flowing direction to stop flood. Due to the fact that the two ends of the hanging bridge are correspondingly fixed to the two sides of the crevasse, a channel for an operator to pass through is formed, and it is avoided that a person performs operation in theflood; each hanging plate, suspending above the crevasse, of the hanging bridge is provided with the stopping pile rod in a penetrating manner, and the stopping pile rods are used for being inserted into the riverbed; the water stopping piece is placed on the side, close to the inner side of the crevasse, of each stopping pile rod; each water stopping piece is limited due to stopping by the corresponding stopping pile rod, and a role of stopping the flood temporarily can be played; and at the moment, soil and stone, sand bags and other filler are thrown into the side, backing onto the riverbed, of the water stopping pieces, and washing away by the flood is not likely to be caused, the crevasse plugging time is shortened, and the work efficiency is improved.

The invention discloses a lotus root digging machine with a self-cleaning structure. The lotus root digging machine comprises a horizontal base, wherein three independent and adjacent cavities are formed in the base, a support frame is arranged at the upper end surface of the base, a water suction pump and a diesel engine are arranged on the support frame, the diesel engine is used for driving the water suction pump to work, a water inlet and a water outlet of the water suction pump are respectively connected with a first pipeline and a second pipeline, one end of the first pipeline extends into a second cavity, an opening of the first pipeline is positioned just under the interior of the second cavity and is provided with a blade mounting seat, blades sleeve the blade mounting seat, a water tank is arranged at one end of the second cavity along the length direction, one end of the second pipeline is connected with the water tank, and spraying nozzles are uniformly arranged at the lower end of the water tank. The lotus root digging machine has the advantages that the structure is simple, and the convenience in use is realized; the mud, sand, water grasses and the like around a water suction pipe can be timely cleaned in the working process of the lotus root digging machine, the blockage problem of a filtering net is solved, the normal working of the water suction pump is guaranteed, the service life is prolonged, the cost is reduced, and the working efficiency of the lotus root digging machine is improved.

The invention relates to a dome repairing method that drills some deep holes on the dome by jack hammer or drilling machine, adds mixture vegetation in it and plants climbing plant on it, and uses the haulm of the plants to cover the dome. The method has little engineering work load, and the nutritive layer is not easy to be swept away, and it could also fix the dome.

The invention provides a resistance changing agent for changing soil resistance. The resistance changing agent is characterized by comprising a composite powder preparation for electric conduction. The composite powder preparation comprises the following raw materials by weight: 5-15 parts of graphite, 1-10 parts of mineral glue, 1-10 parts of resin, 1-10 parts of conductive cement, 1-10 parts of metal powder and 1-6 parts of industrial salt. In soil resistance changing, the resistance changing agent further comprises water. Furthermore the weight ratio between the water and the composite powder preparation is 33-100:16-48. The resistance changing agent can be well kept in the clearances among soil, gravels and rocks for effectively enlarging a conductive range next to a grounding member, thereby sufficiently discharging lightning current to ground when lightning occurs. Furthermore the resistance changing agent has relatively high solidifiability and is not easily washed away by rainwater. The resistance changing agent is totally composed of natural mineral materials and causes no pollution to soil, crops and plants.

The invention relates to the field of extinguishing materials, in particular to a dissolving-resisting-type foam extinguishing agent. The dissolving-resisting-type foam extinguishing agent is high inenvironment-friendly degree. The components of the dissolving-resisting-type foam extinguishing agent comprise, by mass, 40-60 parts of alkyl glycoside foaming agents, 10-20 parts of carbon hydrogen surfactants, 15-20 parts of biological polysaccharide, 6-15 parts of antifreeze agents, 4-6 parts of foam stabilizers, 4-6 parts of wetting agents and 20-40 parts of pure water. The dissolving-resisting-type foam extinguishing agent has the good foaming characteristic which is mainly shown in dense and lasting foams, the stacking speed is high, and contact of comburent and air can be quickly isolated. In addition, the dissolving-resisting-type foam extinguishing agent adopts the nonhazardous chemical raw materials and accordingly is small in pollution to the environment.

The invention relates to a folding protection wall capable of being removed quickly, which comprises at least two unit protection walls, wherein each unit protection wall comprises two side meshes and two edge meshes, two vertical edges of the two side meshes are connected with two vertical edges of the two edge meshes respectively in a foldable way, and an inner lining is arranged in each unit protection wall. The folding protection wall is characterized in that bottom meshes are arranged among bottom edges of the side meshes and the edge meshes, wherein each bottom mesh comprises a first half mesh and a second half meshes which are both rectangular, have the same length and as long as the horizontal length of each edge mesh, one long edge of each of the first half mesh and the second half mesh are respectively connected with bottom edges of adjacent two meshes in a foldable way. When the folding protection wall is in use, the adjacent edges of the first half mesh and the second half mesh are overlapped, and the two ends of each overlapped edge are both connected with a hoisting steel rope. The folding protection wall has a wide application range and can be used as a protection wall of a temporary protecting embankment for fighting against flood or a protection wall of a military target.

The invention discloses a natural water artificial fish spawning nest setting system which comprises an overwater floating object intercepting and distributing device, a front end fixing device, a plurality of lifting fixing devices and a plurality of fish spawning nest units. The natural water artificial fish spawning nest setting system solves the problems of large artificial fish spawning nest placement setting area limit, short artificial fish spawning nest service life, poor artificial fish spawning nest use effect, high management difficulty and the like in the prior art, and has the advantages of simple structure, wide applicable range, capabilities of effectively reducing overwater floating object accumulation and setting artificial fish spawning nests at the stream segments with torrential water flow, large water level height changes, hard bottom sand sediments and the like.

The invention discloses a long-acting specific compound fertilizer for a granulated sugar coconut tree and a preparation method thereof. The long-acting specific compound fertilizer for the granulated sugar coconut tree comprises the following raw materials by dry weight: 16-18 parts of granulated sugar coconut tree stem leaf powder, 8-10 parts of macadamia nut shell particles, 8-10 parts of bagasse, 10-12 parts of poultry excrement, 5-6 parts of plant ash, 1-2 parts of humic acid, 17-18 parts of urea, 14-15 parts of a calcium magnesium phosphate fertilizer, 10-11 parts of potassium chloride, 1-2 parts of a water-retaining agent, and 0.5-1 part of a microbial preparation. The long-acting specific compound fertilizer is prepared by the following technical processes: pre-treating raw materials, compositing, fermenting to be maturity, adding the raw materials, uniformly mixing, and pelleting the fertilizer. The long-acting specific compound fertilizer has the slow release function, is used for the granulated sugar coconut tree specifically, and is capable of reducing the frequency of the fertilization, and reducing the fertilization labor cost.

The invention relates to a spleen tonifying and damp clearing herbal tea prescription. The spleen tonifying and damp clearing herbal tea prescription comprises, by weight, 15g of poria cocos, 15g of common yam rhizome, 15g of semen coicis, 10g of roasted malt, 15g of bighead atractylodes rhizome, 10g of pericarpium citri reticulatae, 10g of angelica sinensis, 15g of radix puerariae, 15g of astragalus membranaceus, 18g of talc, 10g of costus Saussure lappa, 10g of endothelium corneum gigeriae galli and 6g of liquorice. The spleen tonifying and damp clearing herbal tea prescription gives priority to conditioning and nourishing and has efficacy of clearing damp to remove heat, tonifying spleen to eliminate dampness and tonifying spleen to supplement qi.

The invention discloses an intelligent system for on-line analysis of sewage, wherein the method comprises a sewage collection module and a sewage analysis module for on-line analysis of the sewage collection module; the intelligent system also includes an image monitoring module, a water flow monitoring module, a PLC control module and a rotating protection mechanism; an image analysis module isused for on-line analysis of the surrounding environment on a water surface at an intelligent system mounting position by the image monitoring module; the PLC control module is used for receiving processed data of the image analysis module and processed data of the water flow monitoring module; when the PLC control module determines that an object, having the speed and volume exceeding the set threshold, on the water surface is close to the intelligent system or when the PLC control module receives information that the water flow speed exceeds the set threshold, the PLC control module controlsthe rotating protection mechanism to rotatingly protect the intelligent system. With changing of a forced position of the intelligent system, the intelligent system cannot be easily washed away by water flow, and can monitor the movement speed and size of a foreign body on the water surface of the installation part.

The invention discloses a device and a method used for removing lead ions in industrial wastewater via gamma-polyglutamic acid adsorption. The device comprises a reaction tank, a water inlet tank, and a dosing tank; the water inlet tank is connected with one side of the reaction tank via a water inlet pipe, and the opposite side is provided with a water outlet pipe; the top surface and the bottom surface of the reaction tank are provided with vertical upper baffle plates and vertical lower baffle plates alternately; the interior of the reaction tank is divided into a plurality of communicated reaction chambers by the upper baffle plates and the lower baffle plates; and each of the reaction chambers is communicated with the dosing tank via a pipeline. According to the method, in feeding of lead-containing waste liquid, a prepared gamma-polyglutamic acid (gamma-PGA) solution is delivered into a reaction system via a plurality of points, full contact of gamma-PGA with the lead-containing waste liquid is realized with continuous slow flowing of the lead-containing waste liquid in the reaction tank, lead ions are adsorbed continuously, flocculation is realized, and precipitation of lead ions to the bottom of the reaction tank under gravity action is realized; the lead-containing liquid is treated in two chambers, and then is delivered into a next reaction chamber via one lower baffle plate, so that one reaction period of the lead-containing liquid is completed; and water can be discharged after three above repeated reaction periods.

The invention discloses a small piping cramming device. The small piping cramming device comprises a steel hollow ball (1), a high-strength fiber cable (2) and a plug body (3). According to the small piping cramming device, the structure is simple, and utilization is convenient; the steel hollow ball is sucked into piping through suction generated by the piping, suction is conducted to the plug body through the high-strength fiber cable, and the plug body is pulled to accurately enter the piping; the plug body is provided with an alloy strut, a hard rubber plug body and a soft rubber outer layer with an air sac, the alloy strut can bear tensile force of flotation leading, and the plug body is guaranteed to have relatively good strength; design of threads and a check block is adopted, so that the device is firmer; the hard rubber plug body is a main body for cramming the piping, so that cramming can be guaranteed firm; the soft rubber outer layer with the air sac can better fill clearances between the hard rubber plug body and the irregular piping wall and is not liable to wash away; and a flared flange can block small gaps around the piping, and the piping cramming effect is improved.

The invention provides a precise fertilizing mechanism of a rice transplanter. The precise fertilizing mechanism of the rice transplanter comprises a frame, a fertilizer storage box, a fertilizing pipe, an opener and a fertilizer feeding mechanism. The fertilizer storage box is arranged on the frame, the feeding end of the fertilizing pipe is connected to a fertilizer outlet of the fertilizer storage box while the discharge end is connected to the back end of the opener; a flexible auger is arranged in the fertilizing pipe, and the upper end of the flexible auger is connected to a power device. The fertilizing precision of the flexible auger is far higher than that of a fertilizing mechanism of an air blower, and the flexible auger is flexible and sensitive. The whole fertilizing pipe can fertilize dynamically and the flexible auger can deform, so that the mechanism is more conveniently placed and mounted.