54 results about "Toxic waste" patented technology

The invention belongs to the technical field of a VO2 low-dimensional structure growth process, and particularly relates to a chemical vapor deposition preparation method for realizing a natural bending VO2 nanowire with a controllable curvature radius. According to the method, a chemical vapor deposition system formed by a sliding rail type tube furnace is selected, a Si / SiO2 substrate is selected as a substrate, V2O5 powder is taken as a precursor, and controllable preparation of the bent VO2 nanowires with different curvature radiuses is successfully realized by comprehensively regulating and controlling growth parameters of chemical vapor deposition (CVD); the bottleneck that only conventional linear VO2 nanowires can be prepared through an existing chemical vapor deposition method is broken through. The bent VO2 nanowires with different curvature radiuses, which are prepared by the method disclosed by the invention, are relatively high in quality, good in crystallinity and uniformity, excellent in MIT characteristic and special in mechanical property. The method has the advantages of simplicity in operation, high repeatability, no toxic waste gas emission and the like, and is beneficial to large-scale popularization and application.

The invention provides a welding and ultrasonic flaw detection synchronous operation device and method, and relates to the technical field of welding. The welding and ultrasonic flaw detection synchronous operation device comprises an electromagnetic eddy current generation module, a sound field regulation and control module, a magnetic-sound composite suspension unit, a distributed edge decision network and a defect in-situ repair module, and the electromagnetic eddy current generation module is composed of an annular array superconducting coil, a high-frequency power source with the output frequency of 1 kHz to 1 MHz and a programmable phase controller. And the phase controller can adjust the current phase difference between the adjacent coils to be 15-90 degrees. According to the technology, welding and nondestructive testing can be synchronized, the integration degree is high, the efficiency is greatly improved, real-time monitoring and in-situ accurate repairing of defects can be achieved, traditional reworking defects are avoided, technological parameters are adjusted in a self-adaptive mode through intelligent cooperative control, the state of a molten pool is optimized, non-contact machining is adopted, energy consumption and material waste are reduced, no toxic waste is discharged, and the method is suitable for industrial production. And the green manufacturing concept is met.

The present application relates to coke oven gas purification desulfurization and dehydrocyanation technical field, especially to a kind of closed molten sulfur collection system and process.It includes multiple molten sulfur kettles (1) connected in parallel by pipeline, also includes multiple buffer tanks (3), multiple inclined pipes (7) and a sulfur receiving disc (10);Each molten sulfur kettle (1) is connected with respective buffer tank (3) by pipeline, buffer tank (3) is connected with one end of inclined pipe (7) by pipeline;The other end of multiple inclined pipes (7) is merged into a main pipe, and the main pipe is connected with the sulfur receiving disc (10).Sulfur collection after molten sulfur kettle is completely closed, effectively avoid toxic waste gas, sulfur dust and molten sulfur splashing to bring harm to workers;At the same time, sulfur collection process can realize unmanned operation on site, save labor cost.

The invention discloses a waste gas recovery and treatment combined device for traditional Chinese medicine forging and a control method of the waste gas recovery and treatment combined device, and belongs to the technical field of traditional Chinese medicine forging. An observation window for observation is fixedly mounted on a door plate of the calcining furnace; a door plate of the calcining furnace is fixedly connected with a visual detection assembly for observing the color of gas in the calcining furnace; the top of the calcining furnace is fixedly connected with a thermocouple for temperature monitoring; the top of the calcining furnace is connected with an adjustable gas outlet assembly for controlling gas discharge; the adjustable gas outlet assembly is respectively connected with a fifth gas outlet pipe for directly discharging gas, a sulfur recovery assembly for recovering sulfur and an adsorption assembly for adsorbing sulfur dioxide, and the gas outlet ends of the sulfur recovery assembly and the adsorption assembly are fixedly connected with the fifth gas outlet pipe. According to the invention, recovery and treatment of toxic waste gas are realized, and harm of toxic waste gas to human body and nature is reduced to a great extent.

The present application relates to the technical field of fine chemical product synthesis, and in particular to a synthesis method of 3-chloropropynyl co-production of p-chlorobenzaldehyde, which comprises the following steps: mixing propargyl alcohol, a solvent, an ionic liquid catalyst, a cocatalyst DMF and a polymerization inhibitor p-tert-butyl catechol, heating and slowly adding p-chlorobenzylidene dichloride dropwise into the mixture, collecting the generated 3-chloropropynyl crude product at the tail gas outlet, cooling after the reaction is completed, and sequentially reducing pressure rectification of 3-chloropropynyl, the remaining propargyl alcohol and the solvent, and p-chlorobenzaldehyde product through a rectification tower. The present application solves the problems of using toxic and hazardous chemicals chlorinating agent in the production of existing 3-chloropropynyl, and generating a large amount of toxic waste acid gas or low-value byproducts, and the problem of low utilization rate of chlorine atom in the existing direct hydrolysis method of p-chlorobenzaldehyde, and reduces environmental pollution.

The invention relates to the technical field of waste gas recovery treatment equipment, and discloses urea-formaldehyde resin curing agent synthesis waste gas recovery equipment which comprises a treatment tank body, a smearing assembly is fixedly mounted in the middle of an inner cavity of the treatment tank body, and the smearing assembly comprises an outer frame with the bottom movably sleeved with a grid assembly; and a driving motor is fixedly installed in the middle of the inner cavity of the outer frame, the bottom of the outer surface of the driving motor is fixedly sleeved with an inner spraying piece, and the inner spraying piece comprises a smearing plate with the bottom end making contact with the top end of the grid assembly. According to the urea resin curing agent synthesis waste gas recovery equipment, a smearing assembly and a structure on the smearing assembly are arranged, under the surface tension effect of liquid, chemical agents can be reserved in meshes in a grid assembly, when toxic waste gas penetrates through the grid assembly from bottom to top, the toxic waste gas can make contact with and react with the chemical agents reserved in the meshes, and therefore the toxic waste gas can be recycled. Compared with chemical agent spraying, the mode has the advantage that the effective utilization rate of chemical agents is high.

The invention discloses a method for detecting lead plaster components of a waste lead-acid storage battery. The invention relates to the technical field of waste storage battery resourceful treatment and detection, the method comprises preparation and calibration of an EDTA standard solution, and continuous determination of the content of lead oxide, lead sulfate, metal lead and lead dioxide in lead plaster, through use of formic acid, ammonium carbonate and other reagents and combination of an ultrasonic-assisted extraction technology, the dissolution efficiency is significantly improved, and the content of lead oxide, lead sulfate, metal lead and lead dioxide in the lead plaster is determined. The reaction time is greatly shortened; the selective dissolution of the metal lead is realized by accurately controlling the low-temperature condition and the reaction time, and the interference of lead dioxide is effectively avoided; according to the method, by optimizing a reagent system and introducing ultrasonic-assisted extraction, the dosage of strong acid and the emission of toxic wastes are greatly reduced, the method is more environment-friendly while the result accuracy is ensured, and the method is clear in operation flow, good in reproducibility and suitable for rapid and reliable determination of the components of the lead paste in an industrial recovery scene.

The invention discloses a fusion magnet recovery cable surface continuous chromium removal system and method, and relates to the technical field of superconducting material surface treatment.The fusion magnet recovery cable surface continuous chromium removal system comprises a polishing module which comprises a rough polishing brush and a fine polishing brush; the positioning tool module is used for overturning and lifting the superconducting cable base body; the intelligent control unit is used for parameter setting and process control; the ultrasonic cleaning device is used for removing residual abrasive dust and surface pollutants after polishing; a nitrogen protection system; provided is a thickness gauge. Efficient chromium removal is achieved through the double-stage polishing process, the chromium removal rate is increased, the plied yarn scratch depth is reduced, meanwhile, mechanical chromium removal is adopted to replace a chemical method, environment friendliness is achieved, no toxic waste liquid is discharged, meanwhile, an intelligent control unit is integrated, accurate control over process parameters and automatic abrasion compensation are achieved, and the method is suitable for various superconducting cable types and has wide application prospects. The system is particularly suitable for preparing a superconducting cable connector terminal of a nuclear fusion device, and is convenient to maintain and remarkable in economic benefit due to modular design of equipment.

The present application relates to the technical fields of coated sand core making, in particular to a sand shooting machine for forklift accessory mold forming, comprising a sand shooting machine body, sand shooting heads, and a feeding table, wherein the sand shooting machine body is provided with the feeding table and a plurality of sand shooting heads, the sand shooting heads are provided with sand shooting nozzles, the feeding table can move in the vertical direction, the feeding table is provided with an upper mold at the bottom end, the sand shooting machine body is provided with a lower mold, the upper mold and the lower mold are matched to form a mold for forming coated sand, the sand shooting heads and the sand shooting nozzles are matched to spray coated sand into the mold, and the sand shooting heads and the feeding table are provided with a waste gas removal device. When the coated sand in the mold is heated to produce toxic waste gas during the working process of the sand shooting machine, the waste gas removal device can automatically remove the toxic waste gas.

The utility model relates to the technical field of waste gas disinfection and purification, in particular to a waste gas discharge disinfection and purification device of a medical vacuum unit, which comprises a discharge pipeline, a first clamp in contact with the rear of the discharge pipeline, internal threads arranged on the inner side of the rear of the first clamp, and an air inlet filter group spirally connected with the inner side of the rear of the first clamp. The air inlet filter group comprises a first extension pipe, a second extension pipe, external threads and filter cotton, the outer side of the second extension pipe is in contact with a second hoop, and the rear of the inner side of the second hoop is in contact with an epoxy resin shell; through design cooperation, the device can purify toxic waste gas entering a discharge pipeline, filter cotton of an air inlet filter set blocks dust with large particles in the waste gas, and then the dust is discharged through plasma ozone generated by a plasma ozone generator and positive and negative currents generated by a discharge negative electrode and a high-voltage discharge tungsten needle. And waste gas entering the epoxy resin shell can be purified.

The invention discloses a preparation method of a compact membrane of a metal material, and solves the problems that a traditional passivation method can generate toxic waste liquid and is high in operation cost. The preparation method comprises the steps that the metal material is sequentially unfolded and hung, then surface degreasing cleaning is conducted, after cleaning is completed, a first-level skin film is generated on the surface, and finally a repairing skin film is generated on the surface of the metal material where the first-level skin film is generated. The preparation method is simple, only an alkali cleaning agent, air and deionized water are used in the preparation process, environmental protection and low cost are achieved, and the corrosion resistance is greatly improved compared with a traditional passivation technology.

The utility model relates to gas purification equipment technical field especially relates to a waste gas filter tank and gas washing equipment, and the device contains: fixedly arranged on the air inlet pipe of jar body, the air outlet end of air inlet pipe communicates with the inner chamber top of jar body for transmission toxic waste gas, the air outlet pipe is fixedly arranged on jar body, and the air inlet end of air outlet pipe communicates with the inner chamber top of jar body, the water supply pipe is fixedly arranged on jar body, and the output end of water supply pipe communicates with the inner chamber of jar body for transmission cooling water to the inner chamber of jar body, the shunt pipe is arranged in the air outlet end of air inlet pipe for the shunting of toxic waste gas that air inlet pipe output has carried out. The utility model discloses by adopting shunt pipe and shunt formation multiple small air current with toxic waste gas, to increase the contact area of toxic waste gas and cooling water, and then enhance the heat exchange efficiency of cooling water to toxic waste gas and the capture effect of solid phase particulate impurities, solved the low problem of cooling efficiency in the prior art.

The invention discloses environment-friendly silicon carbide seed crystal treatment equipment which comprises a driving motor, a driving cylinder, a water storage tank, a top plate and a bottom plate, wherein a first belt pulley is mounted at the output end of the driving motor; the driving cylinder is mounted on a U-shaped frame; the water storage tank is mounted on a base; a protective cover is installed at the upper end of the top plate in a sealed mode, an output shaft of the driving motor is rotationally connected with the protective cover through a third sealed bearing, and the output end of the driving cylinder is connected with the protective cover. A plurality of groups of splines are rotationally arranged on the top plate through first sealing bearings, the splines are spirally arranged, a second belt pulley is mounted at the upper end of each spline, and the first belt pulley and the second belt pulley are connected through a toothed belt; and a movable pipe is arranged on each spline in a sliding manner. According to the equipment, seed crystals are immersed in deionized water for micropore treatment so as to realize rough treatment on the surfaces of the seed crystals, the operation is convenient and simple, the safety is high, toxic waste liquid is not generated, and the equipment is environment-friendly.

The utility model relates to the technical field of gas purification equipment, in particular to waste gas treatment equipment which comprises a collecting tank, a first partition plate and a gas guide hole, a first water solution is pre-stored in the collecting tank; the first partition plate is fixedly arranged on the top wall of an inner cavity of the collecting tank in the height direction of the collecting tank and divides the inner cavity of the collecting tank into a first collecting chamber and a second collecting chamber, the top of the inner cavity of the first collecting chamber is communicated with the air inlet end of the collecting tank, and the upper portion of the inner cavity of the second collecting chamber is communicated with the air outlet end of the collecting tank. The air guide hole is formed in the first partition plate, located in the bottom of the inner cavity of the collecting tank and communicated with the first collecting chamber and the second collecting chamber. According to the utility model, the first partition plate provided with the gas guide hole is arranged in the first collection chamber of the collection tank, and particulate matters mixed in waste gas can be effectively captured by utilizing the first aqueous solution stored in the collection tank, so that the defect of poor capturing effect on powder mixed in toxic waste gas in the prior art is overcome.

A device for addressing normal cyclic limb / hoof loading that causes devastating consequences in a horse at risk for SLL or suffering from acute laminitis. Weight force / ground reaction force interaction is cyclically loaded and offloaded to enhance perfusion of the supporting lamellar apparatus, solar corium, and other hoof structures with nutrient laden blood and removal of the lymph fluid with toxic waste products. The device causes a forced cyclic hoof motion of the loaded or unloaded patient in a lateral recumbency pained hoof. The motion is applied to hydraulically force or enhance the tissue perfusion of the hoof's internal structures and enhance or reestablish normal health of the hoof. Various externally applied forces are utilized, including mechanical, electrical, hydraulic, and other manners, to increase the reduced or non-existent cyclic loading of the limb. The device can be used to measure / record movement and adjust cyclic frequencies and range of motion.

The utility model discloses magnetic density separation equipment for classifying electronic waste particles, which relates to the technical field of electronic waste treatment and comprises a bottom plate, and four supporting legs and two supporting plates are fixedly connected to the upper surface of the bottom plate. Superconducting magnets fixed to the supporting legs at the corresponding positions and a plurality of rotating rods rotationally connected with the supporting plates at the corresponding positions are arranged above the bottom plate. According to the device, various metals mixed in electronic wastes can be effectively separated at the same time through the paramagnetism of the magnetic fluid and the density difference of different metals, compared with other traditional schemes, the process steps are greatly shortened, and compared with a traditional method depending on chemical reagents or high-temperature smelting, physical separation does not need to use strong acid, cyanide or high temperature, and the cost is reduced. Separation is achieved only through physical fields such as a magnetic field and water flow, so that emission of toxic waste water and waste gas is remarkably reduced, the environmental protection treatment cost of enterprises is reduced, and meanwhile workers are prevented from making direct contact with heavy metal and harmful chemical substances.

The utility model discloses a drying device for electromagnetic wire processing, which comprises a drying box, one end of the drying box is fixedly provided with an electromagnetic wire cleaning structure, and the other end of the drying box is fixedly provided with a waste gas treatment device. According to the electromagnetic wire drying device, the sponge arranged at the outlet of the electromagnetic wire is used for adsorbing coating which is not dried outside the electromagnetic wire, and the elastic scraping plate can be used for scraping bumps generated when the electromagnetic wire is impregnated, so that agglomerated blocks fall into the collecting box through rectangles on the fixing plate, and the drying effect of the electromagnetic wire can be improved; a waste gas treatment device is installed, an arranged induced draft fan can pump out toxic waste gas produced during drying, an arranged activated carbon plate can effectively adsorb toxic gas, the gas penetrates through the lower portion of a connecting frame through a partition plate, then waste heat carried in the gas can be transmitted to water in a water storage tank, and the water is heated; and then drying hot air can be recycled, and resources are saved.

The invention discloses a preparation method and application of composite ferrite-loaded magnetic calcium sulfate whiskers, and the preparation method comprises the following steps: pretreating electroplating wastewater with ferrous sulfate, then adding ferroferric oxide nanoparticles, mixing and stirring, adding calcium oxide, aging, and then carrying out solid-liquid separation and drying to obtain the composite ferrite-loaded magnetic calcium sulfate whiskers. The magnetic calcium sulfate whisker loaded with the composite ferrite nanoparticles is obtained; in addition to Cr < 6 + > and Cr < 3 + >, the electroplating wastewater also contains at least one of Ni < 2 + >, Cu < 2 + >, Mn < 2 + >, Fe < 2 + > and Fe < 3 + >. According to the method, heavy metal ions in the electroplating wastewater can be directly converted into reusable and practical solid chemicals, meanwhile, no toxic waste is generated, no new pollution is caused, and carbonyl sulfide in gas can be effectively removed through the obtained solid chemicals.

The invention discloses a circulating printing oven, and relates to the technical field of printing equipment, the circulating printing oven comprises an oven cover and an oven body, one side of the oven cover is rotatably connected with one side of the oven body, the other side of the oven cover is movably connected with the other side of the oven body through an opening and closing air cylinder, and a plurality of air blowing openings evenly distributed in the length direction of the whole cover body are formed in the oven cover. The side edge of the drying oven body is provided with an opening allowing printed matter to pass through, the air blowing opening is connected to a heat collection box through an air inlet pipe, the heat collection box is connected to a centrifugal fan, the centrifugal fan is connected to a circulating air pipe, and the circulating air pipe is a three-way pipe and is connected to the space in the drying oven body and external air. And a waste discharge port is formed in the oven cover. The circulating printing drying oven is uniform and efficient in drying, the adjusting performance is improved, the circulating printing drying oven is provided with a heat energy circulating and heat recycling structure, heat loss is small, waste can be discharged, and accumulation of water vapor and toxic waste gas is avoided.

The invention relates to the technical field of animal brain tissue sampling, in particular to a low-temperature perfusion device which is characterized in that a recycling groove is formed in the edge of an operation plate, the bottom face of the recycling groove is hollowed out, a binding plate and two stacked low-temperature perfusion assemblies are arranged above the operation plate, and the recycling assembly is arranged in an operation frame; and an operation cooling plate is mounted below the binding plate. The using method of the low-temperature perfusion device comprises the steps that after the limb binding pieces are adjusted, an experimental animal is bound to the upper portion of the binding plate, the two low-temperature perfusion assemblies are filled with a PBS solution and a PFA solution, and then the two low-temperature perfusion assemblies are controlled to conduct PBS solution and PFA solution perfusion on the experimental animal. According to the low-temperature perfusion device, the perfusion function, the low-temperature function and the toxic waste liquid recovery function are integrated, the overall use efficiency of the low-temperature perfusion device is higher, the safety of operators and the environment are better protected, and more importantly, perfusion can be accurately conducted at the small liquid perfusion speed through the ingenious design of the low-temperature perfusion assembly.

The invention discloses a continuous environment-friendly decorative black-plated steel strip based on magnetron sputtering and a preparation method of the continuous environment-friendly decorative black-plated steel strip, and belongs to the technical field of metal material surface treatment.The preparation method comprises the following steps that firstly, vacuum ion bombardment pretreatment is conducted on the steel strip; 2, argon and acetylene gas are introduced into reel-to-reel magnetron sputtering equipment, and a chromium target and / or a titanium target are / is adopted for sputtering; thirdly, a chromium carbide bottom layer and a titanium carbide surface layer are sequentially deposited; and 4, controlling the color and the performance of the plating layer by regulating and controlling the gas proportion, the sputtering power, the film layer thickness and the winding speed. Inert gas sputtering is adopted, no toxic waste liquid is discharged, and the RoHS standard is met; and the film layer is compact, strong in adhesive force and uniform in thickness, and the deviation is controlled within + / -1.2%.

According to the method and system for treating the polycarbonate production waste salt, the pyrolysis temperature is controlled in a two-stage microwave pyrolysis mode of low-temperature pyrolysis and high-temperature pyrolysis, generation of toxic waste gas is reduced, and the ecological environment is protected; in addition, all waste salt is purified and utilized, and the pyrolysis efficiency is improved. High-temperature decomposition waste gas generated in the high-temperature pyrolysis process is treated in a quenching cooling mode, the time of the high-temperature decomposition waste gas in the range of 200-500 DEG C is shortened, secondary generation of dioxin waste gas is reduced, meanwhile, heat is recycled, and waste gas treatment energy consumption is reduced.

The invention discloses a method for preparing an environment-friendly brick from waste incineration fly ash, belongs to the technical field of waste incineration fly ash recycling and reusing, and aims to solve the problems that fly ash needs to be added as a raw material component for brick making, but the fly ash is often enriched with various heavy metal substances, so that the ecological environment and human health are harmed. According to the invention, the waste incineration fly ash is used as a core raw material and is matched with the components such as the cement, the rice hull ash, the ceramic waste and the silica fume, fly ash does not need to be added in the whole process, ecological and health risks caused by enrichment of heavy metals in the fly ash are avoided from the source, the rice hull ash and the ceramic waste are non-toxic wastes, and after the rice hull ash is subjected to refined treatment, the cost is low. Rich silicon dioxide can participate in cement hydration reaction, the interface structure of the brick body is optimized, the overall compactness is improved, the ceramic waste forms stable aggregate after being subjected to multi-stage crushing, brick body framework support is enhanced, shrinkage deformation is reduced, and the environment-friendly brick has excellent compressive strength and breaking strength through the synergistic effect of the silicon dioxide and the ceramic waste and other raw materials.

The invention provides a synthesis method of an ether compound, which is characterized in that a compound as shown in a formula (1) is used as a raw material and reacts in an organic solvent under the action of triethylamine hydrobromide (Et3N.HBr) to generate the ether compound as shown in the formula (1). According to the method provided by the invention, the Et3N.HBr which is low in price, easy to obtain and commercialized is adopted as the accelerant, and direct cross etherification between two alcohol molecules is realized under a mild reaction condition. According to the method, water is used as a unique by-product, so that toxic wastes and a large amount of inorganic salt wastes generated in the prior art are fundamentally avoided; meanwhile, the method has wide substrate applicability, can be efficiently compatible with various complex enol substrates including alkali-sensitive groups, acid-sensitive groups and secondary alcohol and tertiary alcohol structures, is simple and convenient to operate, does not need special equipment, and provides an efficient, economic, environment-friendly and easy-to-scale new way for synthesis of ether compounds.

Electrochemistry is used to generate active nitrating species from nitrate salt in situ in an aprotic solvent to eliminate acidic and / or toxic waste streams associated with the production of energetic materials. The systems / methods perform alcohol nitration without using nitric acid and / or sulfuric acid. As a result, the systems / methods may be operated under milder conditions (e.g., room temperature and ambient pressure). In addition, the disclosed systems / methods offer high product selectivity via controlling electrolysis potential. The electrochemical synthetic method is scalable, highly amenable to continuous processing and can make use of inexpensive feedstocks, making the systems / methods well-suited to large-scale manufacture.

The preparation method comprises the following steps: mixing a silicon raw material with an oxidizing agent, a lithium source, a carbon source and an additive auxiliary material, then carrying out a hydrothermal reaction, and finally carrying out high-temperature carbonization to obtain the lithium silicate in-situ modified silicon-carbon composite negative electrode material. The composite material is composed of a lithium silicate in-situ modified silicon core and a carbon shell, and a carbon coating layer with the thickness of 20-30 nm is generated on the silicon surface. According to the method, the green and environment-friendly principle is followed in the raw material selection and preparation process, toxic waste is not generated, and the requirement of sustainable development is met. And the prepared finished product material has high purity, so that the battery performance can be improved, and the service life of the battery can be prolonged. The method is simple in preparation process, simple and convenient in required equipment operation, relatively low in manufacturing cost and suitable for industrial large-scale production.

The invention relates to a toxic waste gas diffusion monitoring method and system based on machine learning, and the method comprises the following steps: S1, collecting environment index data in real time through a gas sensor and a meteorological sensor disposed in a monitoring area, the environment index data at least comprising pollutant concentration, wind speed, wind direction, environment temperature and humidity; s2, a pollution source feature vector P = (p1, p2) is constructed based on the environmental index data collected in the step S1, p1 represents a pollutant emission intensity index calculated according to real-time monitoring data, and p2 represents a type identifier obtained based on pollutant chemical component analysis; s3, calculating a risk degree score of each monitoring point by adopting an improved entropy weight-TOPSIS comprehensive evaluation algorithm; s4, according to the risk degree score obtained through calculation, toxic waste gas diffusion early warning information is generated in combination with a double-threshold judgment mechanism, and therefore environmental pollution and safety accidents caused by toxic waste gas leakage are better prevented.

The invention discloses a silicon carbide seed crystal surface roughening treatment process which comprises the following steps: S1, placing a silicon carbide seed crystal to be treated on a bearing frame in a treatment tank and fixing the silicon carbide seed crystal; s2, adding deionized water into the treatment tank until the seed crystals are completely immersed; s3, a driving device is started, and the multiple rotary drill bits are driven to rotate at the same time; s4, the drill bit is controlled to move downwards, so that the drill bit makes contact with the seed crystal bonding surface, and a plurality of evenly-distributed micropores are drilled in the surface of the seed crystal bonding surface; s5, after drilling is completed, the seed crystals are taken out of the treatment tank, and surface roughening treatment is completed; and S6, washing the treated seed crystal with deionized water, and drying. According to the equipment, seed crystals are immersed in deionized water for micropore treatment so as to realize rough treatment on the surfaces of the seed crystals, the operation is convenient and simple, the safety is high, toxic waste liquid is not generated, and the equipment is environment-friendly.

The utility model discloses a waste gas recovery treatment device in a molecular sieve raw powder exchange process and an exchange device, and relates to the field of chemical waste gas treatment, the waste gas recovery treatment device comprises an absorption tank and an adsorption tower, the absorption tank and the adsorption tower are sequentially communicated, and the gas inlet end of the absorption tank is communicated with a primary waste gas conveying pipe; the first-stage waste gas conveying pipe is used for sucking waste gas generated by the blending tank into the absorption tank, the gas outlet end of the absorption tank is communicated with the gas inlet end of the adsorption tower through a second-stage waste gas conveying pipe, and the second-stage waste gas conveying pipe is used for sucking gas exhausted by the absorption tank into the adsorption tower. Two-stage treatment is carried out on toxic waste gas generated during preparation of the exchange liquid, toxic substances and pollutants are separated out, qualified air capable of being directly discharged is obtained, the waste gas generated during preparation of the exchange liquid is well treated, and pollution caused by the fact that the waste gas is directly discharged into the air is avoided.

The invention discloses a method for preparing molybdenum disulfide-rich residues from molybdenite, and belongs to the technical field of metallurgical extraction. The method for preparing the molybdenum disulfide-rich residues from molybdenite comprises the following steps that molybdenite powder, sodium phosphate powder and borax powder are added into a containing cavity of a graphite crucible, and smelting raw materials are obtained; the smelting raw materials are smelted in a vacuum or argon atmosphere and then cooled, and residues are obtained; and the residues are sequentially subjected to water soaking and citric acid soaking and then washed and dried, and residues rich in molybdenum disulfide are obtained. The preparation method disclosed by the invention can avoid the generation of strong-toxicity waste liquid, and residues rich in molybdenum disulfide can be obtained in an environment-friendly and efficient manner.