198 results about "Vinyl chloride" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention belongs to the technical field of new materials, and discloses a polyolefin dissolving agent as well as a preparation method and application thereof. The cleaning agent is composed of modified long-carbon-chain imidazole dinitrile amine salt, modified long-carbon-chain imidazole long-carbon-chain anion salt, betaine salt, imidazole acetate, imidazole long-carbon-chain anion salt, quaternary ammonium long-carbon-chain anion salt, imidazole bis (fluorosulfonyl) imide salt, imidazole hexafluorophosphate and long-carbon-chain anion and cation liquid. Under the condition of 180-210 DEG C, polyolefin (PP or PE) with the molecular weight of 50-8 million can be dissolved by adopting the polyolefin dissolving agent disclosed by the invention, and effective extrusion can be realized by adopting a twin-screw extruder after dissolution. After PP / PE powder is dissolved by adopting the polyolefin dissolving agent disclosed by the invention, sheet casting or spinning is carried out, casting sheets or PP / PE fibers are washed by using ethanol / dichloromethane / hydrocarbon / tetrachloroethylene to remove ionic liquid, and a polyolefin diaphragm or polyolefin fibers can be prepared.

Natural renewable resources are used as raw materials, efficient and environment-friendly catalytic performance is achieved through multi-stage optimization, coconut shells, fruit shells, reeds and wood chips are used as base materials in the process, a channel template is introduced after fine crushing, a graded pore structure is constructed, and the mercury-free catalyst is prepared. Dynamic extrusion forming and program temperature control carbonization-activation technologies are adopted to form an active carbon skeleton with a high specific surface area, a pulsating pressure impregnation system is innovatively designed, ultrasonic vibration is combined to strengthen copper chloride solution permeation, deep and uniform loading of active components is realized, and a mixed pickling process is developed in a matched manner. Metal impurities are efficiently removed through the synergistic effect of hydrochloric acid and citric acid, and the obtained catalyst has three-dimensional through pore channels and high-activity component dispersity, can replace a traditional mercury-containing catalyst to be applied to the fields of vinyl chloride synthesis and the like, remarkably reduces the risk of environmental pollution, improves the reaction selectivity and prolongs the service life of the catalyst, and is suitable for industrial production. And a technical support is provided for green transformation of the chemical industry.

The embodiment of the invention provides a polymer binder, a preparation method thereof and an all-solid-state sulfide lithium battery. The polymer binder is a modified polyvinylidene fluoride-trifluorochlor oethylene copolymer, and chlorine in the modified polyvinylidene fluoride-trifluorochlor oethylene copolymer is partially or completely substituted by bromine and / or iodine; in the modified polyvinylidene fluoride-trifluorochlor oethylene copolymer, the molar ratio of a corresponding repeating unit of polyvinylidene fluoride to a corresponding repeating unit of trifluorochlor oethylene is (1-9): (9-1); in the modified polyvinylidene fluoride-trifluorochlor oethylene copolymer, the weight of chlorine is a, the weight of bromine and / or iodine is b, and b / (a + b) * 100% is equal to 1%-100%. The technical effect of improving the cycling stability and safety of the battery is achieved, and then the technical problems that when a traditional binder is applied to the all-solid-state sulfide lithium battery, the interface is unstable, the binding power is insufficient, and the traditional binder reacts with electrolyte are solved.

The invention belongs to the technical field of RAP recycled asphalt mixtures, and particularly relates to a high-dosage RAP recycled asphalt mixture for alpine regions and a preparation method of the high-dosage RAP recycled asphalt mixture. The high-dosage RAP recycled asphalt mixture for the alpine region is characterized by comprising the following components in percentage by mass: 50-60% of RAP, 3-6% of mineral powder, 1-3% of new asphalt, 1-2% of a composite regenerant, 1-2% of a modifier and the balance of a new aggregate, the composite regenerant is composed of pine tar, plant-based epoxy ester oil, cashew nut shell oil and a penetrant. The modifier is prepared from regenerated low-density polyvinyl chloride, hyperbranched epoxy resin and liquid polybutadiene rubber coated waste rubber powder. According to the technical scheme provided by the invention, the technical problems of poor low-temperature performance, water stability and freeze-thaw cycle stability when a high-dosage RAP recycled asphalt mixture is used in an alpine region are solved.

The invention discloses a mineral-based easily-recyclable compostable water-based barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating takes water as a carrier, and is composed of a biodegradable film forming system and a designed graded lamellar mineral system composed of three minerals with different sizes and morphologies. The mineral system comprises flaky kaolin with specific morphology and size, non-asbestos grade flaky talc and fully stripped sodium montmorillonite. A mineral sheet layer forms a compact parallel spreading barrier path in a coating through a specific coating and drying curing process, and excellent water vapor and oxygen barrier, water resistance and oil resistance are realized under the low dry weight of 8-15g / m by combining with a pH value response type reversible cross-linking system. The coating system does not contain polyvinylidene chloride and perfluoroalkyl and polyfluoroalkyl substances. The paper-based material coated with the coating is easy to defibrillate and recover under the standard alkaline warm water condition, the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirement.

The invention discloses a high-performance anti-interference low-voltage cable, which relates to the technical field of power transmission equipment, and is technically characterized by comprising a conductor core, an insulating layer, a shielding layer, a buffer layer and an outer sheath which are sequentially and coaxially arranged from inside to outside, the conductor core is made of a plurality of strands of tinned copper wires through a double stranding process of bunch stranding and compound stranding; the insulating layer coats the outer side of the conductor core; the shielding layer is of a double-layer structure and comprises an inner-layer aluminum-plastic composite belt and an outer-layer tinned copper wire braid layer, and an aluminum layer of the aluminum-plastic composite belt faces the inner side and is in equipotential connection with the conductor core. A layer of conductive carbon fiber cloth is wrapped on the outer side of the braid layer; the buffer layer is filled between the shielding layer and the outer sheath, and a plurality of aramid fiber reinforcing ribs are uniformly embedded in the buffer layer along the axial direction of the cable; the thickness of the outer sheath is made of a weather-resistant polyvinyl chloride material added with an ultraviolet light absorber and an anti-aging agent, and the inner surface of the outer sheath is provided with an anti-skid groove. And a nano montmorillonite filler is uniformly dispersed in the outer sheath.

The invention provides a method for preparing anti-permeation anti-corrosion filler by using waste rubber and anti-corrosion paint, and belongs to the technical field of paints.The method comprises the steps that the waste rubber is smashed and sieved to obtain rubber particles, then the rubber particles are sequentially subjected to acid pickling, alkali washing and water washing and dried, then the rubber particles are added into tetrachloroethylene to be chlorinated, flocculent products are removed through an air blowing rotary furnace, and the anti-permeation anti-corrosion filler is obtained; and adding the rubber particles into tetrachloroethylene again for chlorination, carrying out bubbling operation, and draining to obtain the anti-permeation and anti-corrosion filler. The chlorine content of the impermeable anticorrosive filler prepared by the method is increased, the corrosion resistance is enhanced, and an anticorrosive coating prepared from the filler can effectively solve the problem of diffusion of water molecules, also can effectively inhibit permeation and migration of corrosive medium chloride ions, and can greatly improve the impermeability.

The invention discloses an intelligent safety monitoring and dynamic risk management and control system and method for a polyvinyl chloride polymerization section. The system comprises a sensing and execution layer, a reliable transmission and safety network layer, a digital twinning and intelligent center layer, an algorithm and service center and a business application layer, and an intelligent digital twinborn body which deeply interacts and is fused with a physical working section is constructed, so that fundamental transformation from passive response to active early warning, from experience driving to data and model driving, and from single-point monitoring to global collaboration is realized. According to the invention, an autonomous intelligent closed loop of perception-mapping-diagnosis-decision-control is realized, so that the safety production level of the workshop section is comprehensively improved.

The present invention provides a sound insulation coating, a preparation method thereof and a sound insulation coating. The sound insulation coating of the present invention comprises a styrene-acrylic emulsion, an inorganic filler, an organic sound insulation filler, a porous drying accelerating filler and a drainage drying accelerating fiber, and the organic sound insulation filler comprises at least one of acrylonitrile-butadiene rubber powder, ethylene-propylene rubber powder, polyurethane powder, acrylonitrile foamed microspheres, polyvinylidene chloride foamed microspheres and acrylate foamed microspheres. The present invention also provides a preparation method of the sound insulation coating and a sound insulation coating.

The invention relates to the technical field of gas adsorption materials, in particular to a plasma modified UiO-66-NH2 / activated carbon composite filter material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding activated carbon into a UiO-66-NH2 precursor solution, vacuumizing in a vacuum drying oven for 1-3 hours, then transferring into a reaction kettle, heating to 80-120 DEG C, reacting for 20-25 hours, cooling to room temperature, washing and drying to obtain a UiO-66-NH2 / activated carbon composite material; and placing the UiO-66-NH2 / activated carbon composite material in a plasma reactor, and carrying out plasma treatment by taking H2 / Ar as a working gas to obtain the plasma-modified UiO-66-NH2 / activated carbon composite material. According to the invention, UiO-66-NH2 is loaded in the activated carbon, so that the effects of increasing the specific surface area of the activated carbon and developing a microporous structure are achieved, the adsorption capacity of low-concentration trichloro ethylene reaches 281 mg / g, and the UiO-66-NH2 loaded activated carbon is a filter material for effectively adsorbing trichloro ethylene (TCE).

The invention discloses an application and a method for preventing and controlling longhorn beetles by using a disotropic agent, and belongs to the technical field of prevention and control of agricultural pest longhorn beetles. The component of the lysimachia christinae disruption agent is trans-9-tetradecene-2, 2-difluoroacetate, and the disruption effect of the lysimachia christinae disruption agent is superior to that of a lysimachia christinae disruption pheromone disruption substance under the same dosage. According to the isotropic agent, 100-200 mg of trans-9-tetradecene-2, 2-difluoroacetate is dissolved in liquid chlorinated paraffin and added into a polyvinyl chloride (PVC) capillary tube to be prepared into isotropic filaments, 30-60 isotropic filaments are arranged per mu in the using process, and the result shows that the field lasting period of the isotropic filaments is longer than 3 months, and the isotropic rate is larger than 80%. The isotropic agent disclosed by the invention can be used for remarkably interfering the mating of male and female jettilonghorn beetles, is safe to the environment and natural enemies, is simple to operate, can be used for preventing and treating the pests in a large area, and has important significance on comprehensive treatment of the jettilonghorn beetles.

The invention discloses a method for treating a metal surface through ethylene glycol butyl ether after a fire disaster. The treatment method comprises the following steps that modified ethylene glycol butyl ether is prepared; sequentially adding modified ethylene glycol butyl ether serving as a main chemical solution into the reaction kettle according to the quantitative percentage, and carrying out mixed reaction; standing the mixed chemical solution in the step S2 for 10-20 minutes, and adding water to dilute the mixed solution according to the remaining percentage of the volume of the reaction kettle; the ethylene glycol butyl ether is modified and serves as a main component of the cleaning solution, the sodium phosphate, the epichlorohydrin, the sodium pyrophosphate and the trichloroethylene are mixed according to a proper proportion, a proper amount of water is added for dilution, and the cleaning solution is obtained. Dirt formed by fire disasters on the metal surface can be effectively removed, and metal objects cannot be damaged.

The invention relates to a pretreatment method for chemical recovery of waste plastics. The pretreatment method comprises the following steps: determining the production quantity of the waste plastics to be pretreated; measuring the weight part ratio of polyvinyl chloride in the waste plastics to be pretreated; the weight of polyvinyl chloride in the to-be-pretreated waste plastic is obtained, and the weight of polyvinyl chloride in the to-be-pretreated waste plastic is the product of the production amount of the to-be-pretreated waste plastic and the weight part ratio of polyvinyl chloride; preparing a treatment agent with a set weight, wherein the set weight is equal to the weight of the obtained polyvinyl chloride; and putting the determined production quantity of the waste plastics and the prepared treatment agent into a screw extrusion device, and carrying out extrusion molding under the condition of 180-350 DEG C to complete the pretreatment of chemical recovery of the waste plastics. The waste plastic is subjected to high-temperature extrusion pretreatment, so that PVC is decomposed at high temperature, generated chlorine is removed by using calcium oxide or calcium carbonate, the chlorine removal rate can reach 99.999%, and the removal rate is high.

The application discloses resin-coated urea slow-release fertilizer, a preparation method and application thereof, and first prepares resin-coated urea slow-release fertilizer, adopts polystyrene, polyethylene, talcum powder and starch mixture to be dispersed and heated in tetrachloroethylene to prepare coating liquid, then sprays the coating liquid on the surface of dried urea after pretreatment, and with evaporation of the solvent, a resin layer is formed on the particle, and the resin-coated urea slow-release fertilizer is obtained. The resin-coated urea can simulate atmospheric nitrogen deposition, and can more truly simulate the nitrogen deposition mode.

The application provides a method for preparing anti-permeation anticorrosive filler from waste rubber and anticorrosive paint, and belongs to the technical field of paint, which comprises the following steps: crushing and sieving waste rubber to obtain rubber particles, then sequentially performing acid pickling, alkali washing and water washing, and drying, then adding the rubber particles into tetrachloroethylene for chlorination, then removing flocculent products by using a blast rotary furnace, then adding the rubber particles into tetrachloroethylene again for chlorination and performing bubbling operation, and then draining to obtain the anti-permeation anticorrosive filler. The anti-permeation anticorrosive filler prepared by the method has improved chlorine content and enhanced corrosion resistance, the anticorrosive coating prepared by using the filler can effectively solve the diffusion problem of water molecules, can effectively inhibit the permeation and migration of corrosion medium chloride ions, and can greatly improve the anti-permeation performance.

The invention discloses a concrete curing device and a curing method thereof. The curing device comprises a movable frame; the curing mechanism is arranged and used, so that water or a perchloro-ethylene resin solution can be guided into a first curing barrel and a second curing barrel correspondingly, and the two kinds of stored curing liquid are guided out and sprayed to the concrete pavement to be cured through cooperation with a T-shaped collecting pipe and a connecting hose correspondingly to be subjected to curing operation; the second maintenance barrel can be conveniently expanded, so that the requirement for expanded storage of corresponding maintenance liquid can be met, the practicability is high, in addition, convenience is provided for rotation and reset of an arc-shaped shielding plate, an atomization spray pipe nozzle can be shielded during the idle period of the maintenance device, the phenomenon that later use is affected due to dust accumulation and blockage is avoided, and the maintenance efficiency is improved. And the atomizing spray pipe can be rotated to the advancing side for shielding protection during use, so that the atomizing spray pipe is prevented from being impacted and damaged.

The utility model relates to the technical field of polyvinyl chloride particle production equipment, and discloses cutting equipment for medical polyvinyl chloride particle production, which comprises an equipment shell, the inner wall of the equipment shell is fixedly connected with a mounting plate, the inner wall of the equipment shell is fixedly connected with a guide plate, the inner wall of the equipment shell is provided with a mounting assembly, and the guide plate is fixedly connected with the mounting assembly. And the inner wall of the equipment shell is rotationally connected with a traction roller. The cutting equipment for medical polyvinyl chloride particle production is provided with a mounting groove, a mounting block, a fixing plate, a fixing handle, a round groove, a spring, a round head, a fixing groove, a cleaning brush and a fixing bolt, the round head abuts against the mounting groove through the elastic force of the spring, so that the mounting block is mounted more stably and is not prone to loosening, the mounting block can be pulled out by pulling the fixing handle, and the cleaning brush is convenient to use. Operation is simple and convenient, the cleaning brush can be independently detached and replaced, the cost for replacing the cleaning brush is reduced, and the requirements of people are met.

The invention relates to a preparation method and application of a polypropylene effect master batch, the polypropylene effect master batch can be used for preparing a spraying-free polypropylene product, a special flow line effect is brought through one-time injection molding, and the appearance effect of the product is improved. The polypropylene effect master batch is prepared through a skin-core co-extrusion process and has a skin-core structure, and the skin-core structure resin raw materials comprise an ethylene-trifluorochlor oethylene copolymer, polypropylene random copolymer, a pigment dispersing aid, a pigment, an antioxidant and a lubricant; the core layer structure resin is prepared from the following raw materials: poly (4-methyl-1-pentene), polypropylene random copolymer, ethylene acrylic acid copolymer, pigment, antioxidant and lubricant. By controlling the skin-core structure of the polypropylene effect master batch, the polypropylene effect master batch and the polypropylene resin are subjected to cold mixing and injection molding in proportion, and the spraying-free polypropylene product with the special flow line effect can be prepared.

The invention relates to the technical field of dry cleaning machines, in particular to a dry cleaning machine door opening air purification and regeneration system which comprises a negative pressure gas capturing device and a carbon adsorber, the gas capturing device comprises a negative pressure gas suction port, a negative pressure gas suction channel and a catalytic device, and the negative pressure gas suction port is formed in the circumferential direction of a door frame of a dry cleaning machine; the negative-pressure air suction channel is communicated with the negative-pressure air suction port and the catalytic device, the catalytic device is communicated with the carbon adsorber through an air pipeline, a steam heating pipe, an electric heating pipe, a heat pump and a cold pump are arranged in the catalytic device, and through multi-stage temperature regulation (condensation and heating), the treatment effect on gaseous tetrachloroethylene is remarkably improved; the stainless steel container is filled with granular activated carbon powder, has high specific surface area and good adsorption performance, and can effectively adsorb gaseous tetrachloroethylene, so that the concentration of the tetrachloroethylene in the barrel is reduced to 2g / m < 3 > or below.

The invention provides an oxygen barrier layer, a preparation method of the oxygen barrier layer and a flexible resin plate with textured flat-top lattice points on the surface, polymer particles are formed by in-situ polymerization of polyurethane resin containing free isocyanate monomers and oxygen barrier resin containing hydroxyl in an organic solvent, and solid filler does not need to be additionally added; the molar content of hydroxyl in the oxygen inhibitor resin is greater than the molar content of isocyanate in the isocyanate monomer, so that the oxygen inhibitor is excessive, and the oxygen inhibitor resin, the polyurethane resin and the flatting agent which do not participate in the reaction jointly participate in film formation. Raw materials of the oxygen barrier layer can be dissolved in a mainstream commercially available flexographic flushing medium, such as an organic solvent containing tetrachloroethylene / n-butyl alcohol or a high-end environment-friendly developing solution containing terpene or commercially available Shanghai sensitive morning, and a photopolymerization reaction does not occur. After exposure, laser ablation and plate washing by a flexible plate washing medium, the flexible resin plate with the flat-top lattice points with the sand meshes on the surface is prepared, and the oxygen barrier layer is completely removed without residues in the plate washing process.

The present invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, comprising the following steps:provide a reactor containing a liquid reaction medium comprising waterintroduce in said reactor ethylene monomers and fluorinated monomers, said fluorinated monomers being selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof,pressurize the reactor,initiate polymerization feeding into said reactor a redox initiator comprising an oxidising agent and a reducing agent, wherein said reducing agent in said redox couple initiator is free from sulphur atoms having an oxidation number of 4 or below, wherein the reaction medium is free of fluorinated surfactants.

The invention provides a staged self-adaptive control method for a drying process of a polyvinyl chloride fluidized bed, and relates to the technical field of polyvinyl chloride chemical production process control. Wherein in the constant-speed drying stage, model reference adaptive control (MRAC) is adopted, and the hot air temperature is dynamically adjusted to stabilize the drying rate; model predictive control (MPC) is adopted in the speed reduction drying stage, and accurate water content regulation and control and energy consumption optimization are achieved through predictive optimization. According to the invention, the influence of water content fluctuation of fed materials and hot air temperature interference in the PVC drying process can be effectively resisted, so that the water content of PVC is stably reduced, and the fluctuation of the water content in the drying process is reduced.

The present invention relates to systems and methods for catalytic removal of oxidized contaminants (for example, nitrite, chromate, chlorate, trichloroethene, CFC-11, 4-nonylphenol, RDX, and perfluorooctanoate) from water and wastewater. In some aspects, the catalytic method of removing oxidized contaminants comprises using precious metal nanoparticles as catalysts to reduce the oxidized contaminants.

The present invention relates to a method for resource utilization of waste alkali and waste hydrochloric acid produced as by-products of a tetrachloroethylene heavy component incineration device, comprising the following steps: (1) filtering the waste alkali and waste hydrochloric acid produced as by-products of the tetrachloroethylene heavy component incineration device respectively to obtain a waste alkali filtrate and a waste hydrochloric acid filtrate; (2) subjecting the waste hydrochloric acid obtained in step (1) to organic matter degradation treatment and filtering again; (3) neutralizing the waste alkali filtrate and the waste hydrochloric acid; (4) introducing the neutralized brine obtained in step (3) into a clarification tank, filtering the clarified supernatant to obtain a filtrate; and (5) subjecting the filtrate in step (4) to adsorption treatment and then A / O oxidation treatment to obtain a brine with a COD of less than 100 mg / L. The present invention not only solves the problem that waste hydrochloric acid containing organic matter is difficult to treat, but also solves the problem that the brine generated after acid-base neutralization is directly discharged and wastes resources, thereby reducing environmental pollution, turning waste into treasure, and reducing production costs for enterprises.

The utility model discloses a reaction system for continuously preparing pentachloropropane and tetrachloropropane, which comprises a reaction kettle, a heat exchanger, a static mixer and a Venturi ejector which are connected in sequence, the reaction kettle comprises a reaction kettle body, a stirring device, a magnetic attraction device and a cooling and heating device, wherein the stirring device, the magnetic attraction device and the cooling and heating device are respectively arranged on the reaction kettle body. According to the utility model, iron powder is skillfully fixed in the reaction kettle and is uniformly distributed, so that a larger contact area between liquid and solid phases is provided, the formation of a divalent iron complex is accelerated, and an effective catalyst is supplemented for a reaction system in time. A large amount of circulating liquid can quickly remove reaction heat, and after newly added carbon tetrachloride and auxiliaries are uniformly mixed, vinyl chloride or ethylene gas is uniformly dissolved in the circulating liquid through the venturi ejector, so that the vinyl chloride or the ethylene gas reacts quickly.

The invention relates to a method for measuring the concentration of tetrachloroethylene in water, which comprises the following steps: (1) detecting a standard working solution of tetrachloroethylene by using a high performance liquid chromatograph to obtain a standard working curve of the tetrachloroethylene absorption peak area and absolute concentration of the standard working solution of tetrachloroethylene; (2) detecting a water sample to be detected by using the high performance liquid chromatograph to obtain the tetrachloroethylene absorption peak area of the water sample to be detected; a mobile phase used in the detection of the high performance liquid chromatograph comprises an organic phase and ultrapure water, and the volume ratio of the organic phase to the ultrapure water is (70-90): (30-10); the detection wavelength of the detection is 212 to 216 nm; the temperature of a column oven of the high performance liquid chromatograph is 35-40 DEG C. According to the method disclosed by the invention, the peak appearance time is short, the separation effect of the detected main peak and the impurity peak is good, the fitting degree of the obtained standard working curve is high, the separation degree of the main peak and the impurity peak in the detection of an actual water sample containing tetrachloroethylene is high, and the detection result is reliable.

The present invention relates to the technical field of plastic crushing equipment, and particularly relates to a pulverizing and recycling equipment for polyvinyl chloride materials, including a feeding bin, on which a movable plate and racks located on both sides of the movable plate are slidably installed. A gear ring is provided on the rotating shaft of the movable plate, and the gear ring is used to cooperate with the racks when following the rotation of the movable plate to guide the upward movement of the movable plate. A support member is provided at the bottom of the movable plate, and an adjusting lever is connected to the bottom of the support member; a crushing chamber, on which a crushing roller and a water spray pipe facing the crushing roller are provided. A water pump communicating with the water spray pipe is provided at the bottom of the crushing chamber, and a control valve is provided between the water pump and the water spray pipe. The control valve is used to control the opening of the water spray pipe. The water pump is connected to the crushing roller through a belt pulley assembly. A limit post elastically installed is provided on the rotating shaft of the crushing roller, and the limit post is used to drive the belt pulley assembly when the crushing roller rotates rapidly. The present invention can adjust the crushing speed of the crushing roller, effectively prevent waste products from falling from the conveying equipment and the feeding bin, and is safer.

A novel process for ensuring adequate adhesion between a ketone ethylene ether (KEE) and liquid polyvinyl chloride (PVC) roofing membrane and rubberized tape. The process can be used for roofing membrane repair, maintenance, and reinforcement. The present process uses a plasticizer primer comprising phthalate to coat the KEE / PVC roofing membrane, which has been shown to improve the adhesion to rubberized tape, allowing for good adhesion and increasing the lifespan of the repair, maintenance, and reinforcements.

The application relates to the technical field of wastewater treatment, in particular to a vinyl chloride production method and a production device. The vinyl chloride production method comprises the following steps: taking hydrogen chloride, oxygen and ethylene as main raw materials to generate high-temperature gas containing dichloroethane through an oxychlorination reaction; cooling the high-temperature gas by using a quenching medium, wherein the quenching medium does not contain alkaline substances; separating dichloroethane A from the cooled gas; adding lye into first wastewater; precipitating metal ions in second wastewater and adsorbing organic matters in the second wastewater; performing steam stripping on third wastewater to obtain fourth wastewater and dichloroethane B; generating vinyl chloride monomer by using dichloroethane, wherein the dichloroethane comprises the dichloroethane A and the dichloroethane B; mixing the fourth wastewater and an oxidizing agent to perform catalytic oxidation treatment. The application can solve the problem that wastewater treatment is difficult in VCM production, improve the plugging problem of a wastewater stripping tower and solve the problem that a difficult biochemical treatment system is unstable.