35 results about "Trichloroethylene" patented technology

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 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 application discloses low-cost sulfidized nano zero-valent iron synthesized by using pyrite as raw material and application thereof. The low-cost sulfidized nano zero-valent iron is obtained by using cheap pyrite powder as raw material, adding a small amount of anhydrous FeCl3, and through ball milling, drying and hydrogen reduction. The pyrite powder to which a small amount of anhydrous FeCl3 is added is ball milled by using zirconia ball milling beads which are easy to clean but not easy to be polluted, and then the sulfidized nano zero-valent iron is prepared after drying and reduction. By adjusting parameters such as ball powder ratio, FeCl3 addition amount, heating rate and holding time, the low-cost sulfidized nano zero-valent iron with a particle size of 200-300 nm, zero-valent iron content accounting for more than 90% of total iron content and preparation cost being 11% of that of a laboratory liquid-phase synthesis method is prepared. The material can effectively degrade trichloroethylene (TCE) and florfenicol (FF), has a small hydrogen production amount and a high electron efficiency. The preparation method is simple and easy to operate, has a low cost and has a large-scale production prospect, the degradation performance of pollutants is close to that of the laboratory-prepared sulfidized nano zero-valent iron, and far exceeds that of nano zero-valent iron, and therefore the material has a prospect of being applied to actual groundwater pollution remediation.

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.

There is provided a method for producing chlorofluorobutane (CFB) by forming chlorinated butadiene by dimerizing trichloroethylene (TCE) and fluorinating hydrogen atoms of the chlorinated butadiene. Trichloroethylene (TCE) is dimerized by using a dimer represented by the following formula (1) as a solvent and in the presence of a free radical generating agent at a temperature of 100° C. or higher. Hexachlorobutadiene (C4Cl6) is produced from the above dimer by chlorination and dehydrochlorination reaction, and further, the chlorofluorobutane (CFB) is produced by fluorinating the hexachlorobutadiene.

The invention belongs to the technical field of ceramic precursors, and particularly relates to a silicon-boron-carbon-nitrogen ceramic precursor with a main chain containing alkynyl and a preparation method of the silicon-boron-carbon-nitrogen ceramic precursor. Comprising the following steps: (1) dropwise adding an n-butyllithium solution into an ether solvent, stirring, continuously dropwise adding trichloroethylene, and reacting to obtain an alkynyl dilithium salt turbid solution; (2) adding boron trichloride into the alkynyl dilithium salt turbid solution to carry out primary dechlorination polycondensation reaction, and dropwise adding dichlorosilane to carry out secondary dechlorination polycondensation reaction after the reaction is completed; (3) adding hexamethyldisilazane into the system in the step (2) to carry out an end-capping reaction, collecting supernate after the reaction is finished, and distilling at normal pressure to remove the solvent, so as to obtain a silicon-boron-carbon-nitrogen ceramic precursor crude product; and (4) dissolving the silicon-boron-carbon-nitrogen ceramic precursor crude product in an organic solvent, carrying out dialysis treatment, and carrying out atmospheric distillation on the solution in a dialysis membrane to remove the solvent so as to obtain the silicon-boron-carbon-nitrogen ceramic precursor with the main chain containing alkynyl, and the ceramic yield of the silicon-boron-carbon-nitrogen ceramic precursor in the high-temperature ceramization process can reach more than 70%.

A kind of high permeability warm recycling agent permeability evaluation method and index for in-place hot recycling technology, comprising the following steps: mixing aged asphalt with new asphalt, adding warm mixing agent to develop warm mixing, to prepare warm asphalt;In the flowing state of warm asphalt, use brass or stainless steel ball with diameter of 15mm to uniformly dip asphalt, and let it cool and solidify naturally;Wrap with recycling agent mixed with tracer, stand at room temperature for 12h to let it penetrate into asphalt layer naturally;Dissolve asphalt layer layer by layer with trichloroethylene, extract the solution, and then test the extract by FTIR, the peak area of tracer gradually decreases with the depth of layer from the infrared spectrum absorption peak, and the penetration concentration attenuation equation of recycling agent is obtained by fitting the data of layer, so that the permeability of warm recycling agent can be evaluated.The present application is simple and easy to operate, can quickly detect the penetration performance of warm recycling agent, and has good application prospect.

The application provides a method for optimizing and controlling the reduction efficiency of trichloroethylene by in-situ bio-sulfidized zero-valent iron, selects zero-valent iron with particle sizes of 2 μm, 7 μm and 23 μm, and a dosage of 10 g; selects xanthan gum modified micron iron slurry with masses of 1.5 g, 3.0 g and 6.0 g; collects water medium with a buried depth of 2-3 m, enriches and domesticates trichloroethylene-tolerant and SO4 2‑ reduction function, the water medium sample is collected, and the microorganism domestication is performed within 24 hours; the xanthan gum modified zero-valent iron slurry and the domesticated bacteria liquid are injected into an in-situ groundwater remediation simulation device. ‑ Through the technical scheme of the application, the synergistic effect of multiple microorganisms is achieved, the degree of trichloroethylene dechlorination in the presence of natural electron acceptor NO3 ‑ is improved, the influence of toxic by-products is reduced, the electron selectivity is enhanced, the long-term performance of zero-valent iron is strengthened, finally the reduction path of "chemical dechlorination and biological denitrification" is realized, and the application prospect is good.

This invention relates to a carboxymethyl cellulose-modified nanomaterial of zero-valent iron, its preparation method, and its application in the remediation of trichloroethylene-contaminated water or groundwater. The material is prepared by mixing sodium carboxymethyl cellulose with a water-soluble ferrous salt in a deoxygenated aqueous phase, followed by reduction with an oxygen-free sodium borohydride aqueous solution under nitrogen protection. The sodium carboxymethyl cellulose forms a coating layer on the surface of the zero-valent iron through carboxylate groups, distributing the zero-valent iron particles on the carboxymethyl cellulose framework or the coating layer surface. Scanning electron microscopy analysis shows that the zero-valent iron particles are mainly distributed in the range of 80-150 nm; the zeta potential measured in anhydrous ethanol dispersion is -47 mV. The material is added at 0.5-5.0 g / L to trichloroethylene-contaminated water or groundwater and reacted under sealed, light-protected conditions at pH 6.0-8.0 and a temperature of 20-35°C for the reduction and dechlorination treatment of trichloroethylene.

The invention provides a purification treatment system for acetylene chlorination tail gas in industrial production of trichloroethylene, and relates to the technical field of tail gas treatment systems. A purification treatment system for acetylene chlorination tail gas in industrial production of trichloroethylene comprises a vacuum pump, an after-cooler, an absorption tower, an alkaline tower, a tail gas fan and a combustion furnace, the inlet end of the after-cooler is communicated with the gas outlet end of the vacuum pump, and the outlet end of the after-cooler is communicated with the gas inlet end of the absorption tower; the gas outlet end of the absorption tower is communicated with the gas inlet end of the alkaline washing tower; the gas outlet end of the alkaline washing tower is communicated with the gas inlet end of the tail gas fan; the gas outlet end of the tail gas fan communicates with the combustion furnace. By adopting the method, the problem that VOC generated by acetylene chlorination tail gas in the production process exceeds the standard can be solved, tail water is not generated any more, and the output of salt-containing organic wastewater is greatly reduced.

This invention relates to the field of road engineering, specifically to a method for identifying the asphalt-mineral powder interface transition zone based on a dynamic shear rheometer. The method includes: preparing an asphalt-trichloroethylene solution; preparing asphalt mastic and separating free asphalt based on the asphalt-trichloroethylene solution and filtered mineral powder; performing a first elution on the asphalt mastic to obtain an asphalt sample; repeating the asphalt mastic elution process n times; determining the asphalt film thickness of each asphalt sample; conducting a dynamic shear rheological test on each asphalt sample; calculating and plotting the complex shear modulus master curve based on the complex shear modulus, the time-temperature equivalence principle, the WLF equation, and the CAM model; identifying the first asphalt sample whose complex shear modulus master curve shows a significant change trend relative to the previous eluted sample, and obtaining the asphalt-mineral powder interface transition zone thickness based on the asphalt film thickness of the asphalt sample with the significant change trend. This invention accurately identifies the thickness of the asphalt-mineral powder interface transition zone.

This invention relates to the field of trichloroethylene technology and discloses a trichloroethylene distillation separation apparatus and method, including a desorption tower bottom tank. The output end of the desorption tower bottom tank is connected to a low-boiling tower, and the output end of the low-boiling tower is connected to a low-boiling tower reflux tank and a trichloroethylene tower, wherein the output end of the low-boiling tower reflux tank is connected to the input end of the low-boiling tower, and the output end of the trichloroethylene tower is connected to a TCE tower reflux tank and a TCE intermediate tank. In this invention, a trichloroethylene distillation separation method is implemented by designing a TCE stirred tank and adding silver ammonia solution and color-changing silica gel inside the stirred tank to remove acidic impurities contained in trichloroethylene during the distillation process. This achieves secondary purification of trichloroethylene after the distillation process, reducing the likelihood of decomposition and instability of trichloroethylene during actual use, which can corrode the surface of cleaned devices and cleaning equipment, directly damaging the performance of the devices and the cleaning equipment.

The invention discloses a high-entropy alloy catalyst for catalytic conversion of multi-component VOCs and a preparation method of the high-entropy alloy catalyst, and belongs to the field of catalytic chemistry and environmental chemistry. The PdCuNiInMo nano particles are loaded on the nano SiO2 carrier, and the PdCuNiInMo / SiO2 catalyst is formed by roasting in an atmosphere containing H2. The preparation method comprises the following steps: preparing the PdH nano particles by a solvothermal method, forming the PdCuNiInMo nano particles by a hydrothermal synthesis method, and finally loading the PdCuNiInMo nano particles on the nano SiO2 carrier by an impregnation method. And roasting the loaded catalyst in an H2 atmosphere, so as to form the PdCuNiInMo / SiO2 catalyst. The PdCuNiInMo / SiO2 catalyst prepared by the invention has good catalytic activity and selectivity on mixed VOCs (Volatile Organic Compounds) of trichloroethylene and ethanol, and has a good application prospect in the field of catalysis.

The invention belongs to the technical field of groundwater remediation, and relates to a method for remedying chlorohydrocarbon polluted groundwater by coupling ozone micro-nano bubbles with a circulating well, which comprises the following steps: installing a circulating well in a simulation tank, filling the tank with medium sand to simulate a groundwater aquifer medium, then introducing trichloroethylene sewage with a set concentration, and constructing a groundwater pollution simulation system; ozone micro-nano bubbles are generated; and coupling the ozone micro-nano bubbles with the aerodynamic circulation well to carry out underground water remediation. According to the method, volcanic rock is used as a catalyst, ozone micro-nano bubbles and a pneumatic circulating well technology are creatively fused, and typical chlorinated hydrocarbon-trichloroethylene polluted underground water is treated in a targeted mode. Experimental comparison shows that compared with traditional hydrogen peroxide or metal salt catalysis, the method has the advantages that on the basis of saving the cost, the remediation period can be remarkably shortened, the pollutant removal rate is increased, secondary pollution is reduced, the underground water remediation process is accelerated, the dual goals of energy conservation and high efficiency are achieved, and the method has important practical application value and wide popularization prospects.

The invention discloses a sulfur-nickel zero-valent iron material for deep hydrogenolysis dechlorination based on a high-valence sulfur source and application, and belongs to the field of environmental remediation materials. According to the method, a one-step ball milling process is adopted, an iron source, a nickel source and a high-valence sulfur source are subjected to co-ball milling, and the sulfur-nickel co-doped ball-milled zero-valent iron material is prepared. Compared with a conventional material using a low-valence sulfur source, the high-valence sulfur source is introduced, so that the microstructure and the surface chemical state of the material can be remarkably regulated and controlled, the degradation path of the chlorinated hydrocarbon is effectively changed, the chlorinated hydrocarbon is mainly degraded through a deep reduction hydrogenolysis path, and the degradation efficiency of the chlorinated hydrocarbon is improved. And a beta-elimination way which easily generates toxic by-products such as dichloroethylene and vinyl chloride is not used. The material shows more thorough dechlorination capability and higher electronic efficiency in the remediation of chlorinated hydrocarbon pollutants such as trichloroethylene, meanwhile, the dissolution amount of nickel ions is kept extremely low, and the material is environment-friendly. The invention provides a novel technical approach for developing a novel efficient and stable chlorohydrocarbon repair material without accumulation of byproducts.

This application relates to the technical field of distillation and purification equipment, and discloses an electronic-grade trichloroethylene purification production apparatus, including a distillation column. The distillation column has multiple longitudinally equidistantly arranged trays fixed inside. Several overflow frames are fixedly installed on the top of the trays, and a guide plate is fixedly installed at the bottom of the trays directly below the overflow frames. Gas guide pipes are fixedly installed on both sides of the bottom of the trays, and several gas guide grooves are opened on both sides of the gas guide pipes. The vapor flowing out through the gas guide pipes forms a cross-shaped contact mass transfer with the liquid film flowing vertically downwards along the guide plate. The cross-shaped flow generates high-frequency turbulent disturbances, causing continuous breakage and recombination of the gas-liquid interface, significantly shortening the mass transfer boundary layer thickness, reducing mass transfer resistance, and allowing for faster heat exchange after the liquid film is cut into a thin layer by the gas flow, reducing the risk of decomposition due to localized overheating. This apparatus is suitable for the high-efficiency distillation and purification of trichloroethylene.

The invention relates to the technical field of batteries, in particular to an aluminum air battery and a preparation method thereof. The aluminum air battery comprises an aluminum anode base material, trichloroethylene, a degreasing acid etching solution, an alkali etching solution, a copper foil, a diffusion layer, a catalyst layer, an electrolyte, a polytetrafluoroethylene film and a battery shell, the method comprises the steps that an aluminum anode base material is obtained, and the surface of the aluminum anode base material is pretreated; preparing an air electrode; preparing an electrolyte, obtaining concentrated sulfuric acid, distilled water and an acid-resistant container material, slowly adding the concentrated sulfuric acid into the acid-resistant container with the distilled water, and stirring and mixing; the aluminum anode, the air electrode and the electrolyte are assembled in sequence; carrying out in-situ activation treatment on the assembled aluminum air battery; carrying out packaging treatment on the aluminum air battery; in the aspect of the aluminum anode, the aluminum oxide film can be removed, the aluminum oxide film is effectively prevented from being formed again, the aluminum can be in full contact with the electrolyte, the oxidation reaction of the aluminum is smoothly carried out, and the discharge performance and the energy efficiency of the power battery are improved.

The invention discloses a normal-temperature bionic reductive dehalogenation suspension system and a preparation method and application thereof.The normal-temperature bionic reductive dehalogenation suspension system is formed by mixing nitrogen-rich biochar, patina and cobalt hydroxide according to the mass ratio of 1: (1-5): (0.8-3.8) in a water phase at the normal temperature, nitrogen functional groups in the nitrogen-rich biochar and cobalt hydroxide are utilized to synergistically construct a cobalamin-like structure, active hydrogen is generated and stabilized in situ, and the suspension system is obtained. The patina provides reducing iron species, participates in electron transfer, can form heterojunctions with cobalt hydroxide, and can also be directly adsorbed in a nitrogen structure of bone black, so that the reaction is efficiently carried out, the patina has enzyme-like catalysis characteristics, efficient reduction and dehalogenation of halogenated organic pollutants such as trichloroethylene are realized, the reaction conditions are mild, and the method is suitable for industrial production. Meanwhile, acetylene can be directionally converted into ethylene and ethane.

The present invention is directed to systems and methods for removing trichloroethane (TCA), trichloroethene (TCE), and 1,4-dioxane (1,4-D) from contaminated water and wastewater. The system and methods relying on catalyst reduction of TCA and TCE, and the reduced products are degraded by microorganisms that are capable of biodegrading ethane and 1,4-D. In certain embodiments, a catalyst film comprises precious nanoparticles with diameters of 5-40 nm and a biofilm comprising microorganisms that are capable of degrading ethane and 1,4-D are used in a dual-reactor system to remove TCA, TCE, and 1,4-D from contaminated water and wastewater.

The invention relates to the technical field of boiler cleaning, and particularly provides a boiler oil dirt treating agent and a preparation method thereof.The boiler oil dirt treating agent is prepared from graphene oxide, alginic acid, sophorolipid, decyl glucoside, tea saponin, coconut oil, D-limonene, butyl cellosolve and potassium sorbate. According to the boiler oil dirt treating agent and the preparation method thereof, the boiler oil dirt treating agent is environmentally friendly and mild, pollution emission of traditional washing agents such as steam kerosene, trichloroethylene and a fluorinating agent is reduced, all the components are combined, and the oil dirt removing effect of the boiler oil dirt treating agent is achieved.

The invention discloses a method for determining the content of an anti-rut agent Mobil 8000 in an asphalt mixture, which comprises the following steps: firstly, carrying out Soxhlet extraction on a mixture of asphalt and Mobil 8000 by using a trichloroethylene solvent to obtain an extracted residue Mobil 8000, then determining the mass and particle size distribution of the extracted residue Mobil 8000, and determining the content of the anti-rut agent Mobil 8000 in the asphalt mixture according to the content of the anti-rut agent Mobil 8000. And finally, according to the mass of the extracted residue Mobil 8000 and the extraction rate corresponding to each particle size, calculating the mass of the doped Mobil 8000 in the asphalt sample through a formula. The method has the advantages of simple equipment, convenience in operation, high accuracy and important application value.

The application relates to the field of organic synthesis, in particular to a preparation method of trichlorotrifluoroethane and trifluoroacetic acid, which comprises the following steps: adding trichloroethylene, a catalyst and anhydrous hydrogen fluoride into a pressure kettle, stirring, slowly heating and performing a fluorination reaction, stopping the fluorination reaction, not releasing the hydrogen chloride gas generated in the reaction process, and cooling to-33 DEG C to 0 DEG C; introducing chlorine gas into the reaction kettle, closing the valve of the pressure kettle, slowly heating and reacting, controlling the temperature in the kettle at 30-40 DEG C after the reaction is completed, slowly releasing the gas in the kettle into alkali water absorption, finally discharging the remaining liquid from the bottom valve of the kettle, and adding the liquid into the alkali water for quenching; adding water, standing and separating, and taking the lower oily substance as a trichlorotrifluoroethane crude product; and performing rectification to obtain a finished product. The application can avoid separation and purification of a low-boiling-point fluorination intermediate 1,1,1-trifluoro-2-chloroethane, avoid loss of the intermediate in a post-treatment operation process, and simplify the operation.

The invention discloses a light-cured resin system for additive manufacturing of SiBCN ceramic and a preparation method thereof, and the light-cured resin system for additive manufacturing of SiBCN ceramic comprises the following raw material components: vinyl-containing polyborosilazane, mercaptan, a light absorbing agent, a free radical capturing agent and a photoinitiator. The preparation method of the vinyl-containing polyborosilazane comprises the following step: carrying out reaction on dichloromethylsilane, trichloroethylene-based silane, boron trichloride and hexamethyldisilazane, wherein the molar ratio of the raw materials is 10: (3-7): (3-7): (30-51). The light-cured resin system for additive manufacturing of the SiBCN ceramic can complete printing forming of high-precision polyborosilazane through DLP 3D printing equipment, the SiBCN ceramic prepared through pyrolysis generates equal-proportion shrinkage of about 50%, the sintered ceramic is free of warping and cracking, the original printed basic shape is maintained, and preparation of the SiBCN ceramic in a complex shape is achieved.

The application discloses a microwave-sensitive nickel slag composite asphalt pavement material, which comprises the following components in percentage: 70%-80% of nickel slag aggregate, specifically including 40%-45% of nickel slag coarse aggregate and 30%-35% of nickel slag fine aggregate; 5%-6% of base asphalt; 5%-7% of wave-absorbing modifier; and 6%-7% of mineral powder. A microwave-sensitive nickel slag composite asphalt pavement material preparation method is used for preparing the microwave-sensitive nickel slag composite asphalt pavement material, and comprises the following steps: S1, preparing raw materials of each component according to a preset proportion; S2, pre-treating the nickel slag to obtain nickel slag coarse aggregate and nickel slag fine aggregate; S3, modifying the wave-absorbing agent, ultrasonically dispersing ferromagnetic powder and silane coupling agent in trichloroethylene, and obtaining surface functionalized wave-absorbing modifier after removing the solvent; S4, adding the nickel slag aggregate obtained in S2, the wave-absorbing agent obtained in S3 and the mineral powder into the heated base asphalt in sequence, and then performing high-speed shearing stirring to obtain a mixture; and S5, performing compression molding on the mixture obtained in S4, and controlling the void ratio to be 3%-6%.

The present invention relates to a method for assaying the quantity of hydroxyl functions present in a polyol, the method comprising the following steps: (i) acetylating the hydroxyl functions of the polyol into ester functions by reacting the polyol with acetic anhydride in excess; (ii) hydrolyzing the mixture of acetylated polyol, acetic anhydride and acetic acid obtained at the end of step (i); and (iii) assaying by potentiometry the acetic acid obtained at the end of step (ii), the acetylation step (i) being carried out in the presence of at least one 4-dialkylaminopyridine catalyst of formula (1) or one of the salts thereof: wherein R and R', which are identical or different, are C1-C6 alkyl groups, or R and R' together form a C2-C6 ring, in the presence of at least one solvent selected from toluene, and in the presence of at least one cosolvent selected from xylene, anisole, benzene, chlorobenzene, bromobenzene, cyclohexane, octane, heptane, dichloromethane, dichloroethane, trichloroethane, carbon tetrachloride, trichloroethylene, chloroform, acetonitrile, dimethylformamide, dimethylacetamide, ethyl acetate, acetone, pyridine.

The present invention belongs to the technical field of wastewater treatment. Disclosed are a conductive material-loaded bio-electrochemical system device for removing a trichloroethylene contaminant, and a method. Wastewater to be treated containing trichloroethylene is introduced into a bio-electrochemical system device inoculated with a dechlorination mixed microbiota; microorganisms colonize the surface of a cathode carbon brush to form an electroactive dechlorinating biofilm; electrons flow through an external circuit to a cathode so as to be used by the microorganisms; nano-magnetite and activated carbon enhance the reductive dechlorination of trichloroethylene by enhancing electron transfer. The present invention can completely convert trichloroethylene to ethylene and completely reduce 500 μM of trichloroethylene within 12-15 days, couples electrochemical technology with microbial dechlorination technology, and has the advantages of low cost, environmental friendliness and in-situ repairability.

The application discloses a cleaning method and device for asphalt mortar and mortar test moulds, which comprises the following steps: freezing the test moulds after the test is finished and the test moulds are attached with asphalt binders; knocking off the big asphalt on the test moulds after the freezing; then, storing the test moulds in a refrigerator for a period of time; then, oscillating the test moulds; cleaning the test moulds under the oscillation condition after the test moulds are oscillated for a period of time; and repeatedly oscillating and cleaning the test moulds to obtain the cleaned test moulds. The application can clean the asphalt attached to the test moulds without using the cleaning agents such as kerosene, gasoline and trichloroethylene, so that the health of the test personnel is not harmed, and no industrial waste liquid needs to be treated, and the application is more environment-friendly.

The application discloses a method for regenerating biochar adsorbing trichloroethylene, which comprises the following steps: 1) mixing a Micrococcus halophilus bacterial solution and biochar adsorbing trichloroethylene in a culture medium solution, adding nutrients required for growth of the microorganism to the mixed solution, and degrading and removing trichloroethylene adsorbed on the biochar under anaerobic conditions; and 2) performing solid-liquid separation on the biochar after degradation and removal of trichloroethylene and the Micrococcus halophilus bacterial solution, so as to realize regeneration of the biochar. The application adopts the Micrococcus halophilus to degrade and regenerate the biochar adsorbing trichloroethylene, can degrade trichloroethylene pollutants adsorbed on the biochar, can regenerate the biochar, can make high adsorption performance of the biochar on organic pollutants be kept for a long time, can be applied to remediation of groundwater halogenated hydrocarbon pollutants for a long time, can reduce consumption of material resources, can reduce biochar use and groundwater remediation cost, can reduce secondary pollution, and has good economic and environmental benefits.

The utility model discloses a microwave catalytic cracking device for treating trichloroethylene waste gas, and belongs to the field of trichloroethylene waste gas treatment devices. Comprising a cracking tank provided with a gas inlet for introducing waste gas and a gas outlet for discharging gas; the microwave catalysis box is arranged in the cracking tank; the filter layer is arranged on the side, close to the gas inlet, of the microwave catalysis box, and waste gas sequentially passes through the filter layer and the microwave catalysis box; the brush assembly comprises a rotating shaft barrel arranged in the cracking tank, and one end of the rotating shaft barrel penetrates through the filtering layer; the mounting plate is fixedly arranged in the cracking tank; the brush is arranged on the rotating shaft barrel; and the dust blocking piece is arranged directly facing the brush. The microwave catalytic cracking device for treating trichloroethylene waste gas has the beneficial effects that dust is prevented from directly entering the microwave catalytic box through the arranged filter layer, dust on the surface of the filter layer can be swept through the arranged brush and the arranged dust blocking piece, and dust can be removed through the arranged dust suction pipe; and dust gathered by the brush can be sucked away.

The utility model discloses a superhigh polyethylene microporous diaphragm high -efficient trichloroethylene condenser, including condenser body, the upper portion of condenser body is provided with the pipe of entering for trichloroethylene import, the lower portion of condenser body is provided with the pipe of leading out away from the pipe of entering, is located the inside of condenser body and is opened to have condensing cavity, the inside of condensing cavity is provided with superhigh polyethylene microporous diaphragm, is located the pipe of leading out and is provided with elastic snap -fit assembly, the lower portion of pipe of leading out is connected with condensing pipe, and the connecting end of condensing pipe and pipe of leading out is provided with the buckling assembly of cooperation with elastic snap -fit assembly, wherein, the connecting end of condensing pipe is connected to the elastic snap -fit assembly of pipe of leading out through buckling assembly, and condensing pipe is connected with pipe of leading out. The utility model discloses a combination through elastic snap -fit assembly and buckling assembly, has realized the quick connection and disassembly of condensing pipe and pipe of leading out, need not help the tool, and the operation is simple and quick, has improved the installation and maintenance efficiency of equipment significantly.