34 results about "Toxic dust" patented technology

The invention relates to a device for removing zinc dross in a galvanized wire zinc pot. The device aims at solving the following disadvantages caused due to that the zinc dross in the zinc pot is removed manually at present: as the zinc pot is full of zinc solution, the zinc solution can spill out; the zinc solution can volatilize toxic dust and the temperature is high; therefore, the labor intensity is high, the zinc solution is harmful to human bodies, and potential safety hazards can be incurred. The technical measures of the device are as follows: the device for removing the zinc dross in the galvanized wire zinc pot comprises a supporting post, a guide screw rod connected with the supporting post, a lifting motor, a cantilever structure, a dross scooping mechanism, a PLC controller and a dross pushing mechanism. The device eliminates the potential safety hazards in production, greatly lowers the labor intensity of operating personnel, improves the product quality, lowers the rejection rate and reduces the production cost.

A four-side dust adsorption and easy cleaning workbench comprises four main parts of a transparent dust hood, a tabletop dust absorption system, a workbench frame and a lead powder coarse and fine particle separation system. The transparent dust hood is arranged above the tabletop dust absorption system, the tabletop dust absorption system is on the workbench frame, and the lead powder coarse and fine particle separation system is arranged at the right lower corner of the tabletop dust absorption system. The transparent dust hood surrounds the part above the workbench and the two sides of the workbench to absorb dust from three sides simultaneously; and the dust of the tabletop of the workbench is absorbed by the tabletop dust absorption system. The workbench is used for cutting a battery plate, or assembling the battery plate, producing a lead-acid battery and for other process operations, and also can be used as the indoor workbench of toxic dust or non-toxic dust.

The invention discloses a cleaning process of beryllium oxide ceramic. The process has the following process flow of: preparing oil-removing solution, removing oil with ultrasonic waves, filtering the solution and treating scrap materials, cleaning with flowing water, cleaning with the ultrasonic waves, drying, and taking the beryllium oxide ceramic out. The cleaning process is simple, easy to realize and low in cost; toxic dust attached to the beryllium oxide can be effectively washed off; and the hurt to a human body caused by the beryllium oxide is reduced.

The invention discloses a synthesis method of dibutyltin dilaurate, belonging to the field of organic synthesis. The synthesis method comprises the following steps of: 1, adding lauric acid, dibutyltin dichloride and ethanol into a reactor with a condenser pipe, heating and stirring mixed solution in the reactor, dropping sodium ethoxide-ethanol solution when temperature reaches 50-60DEG C; 2, after the sodium ethoxide-ethanol solution is completely dropped, maintaining the temperature, turning on a cooling water tap after reaction, starting to vacuumize, evaporating ethanol solvent, and stopping vacuumizing and heating when the temperature of the mixed solution in the reactor again reaches 70DEG C and no liquid is distilled off; and 3, conducting separation. By adopting the method of evenly mixing the dibutyltin dichloride instead of dibutyltin oxide with the lauric acid and then dropping sodium ethoxide-ethanol solution to prepare the dibutyltin dilaurate, the step of hydrolyzing dibutyltin dichloride in caustic soda solution is omitted, toxic dust and wastewater are not produced, the environmental and personal health is promoted and water resources are saved.

The invention concerns a system for cleaning electrolytic filtering installations without pressure drop or dismantling of the system. The filtering voltage is maintained at a maximum breakdown-limit value. It consists in equipping each assembly consisting of a tube (4) and a high-voltage electrode (3) with a sound generator (13) arranged at one end to operate it, when the filtering operation is stopped, so as to cause the dust to drop which can then be sucked up by a recovery system consisting of a recovery chamber (14) and an extractor (15). The invention is applicable to all installations involving toxic dust.

The present invention discloses pulse cloth bag type dust removal equipment used on a smelting furnace. The pulse cloth bag type dust removal equipment comprises a cooler (2) communicated with a smelting furnace outlet, wherein the outlet of the cooler (2) is communicated with the inlet of a cyclone sedimentation barrel (3), the outlet of the cyclone sedimentation barrel (3) is communicated with the inlet of a pulse cloth bag type dust removal device (4), and the outlet of the pulse cloth bag type dust removal device (4) is communicated with the inlet of a gas exhaust cylinder (5). With the pulse bag type dust removal equipment of the present invention, a large amount of toxic gases and toxic dust emitting during the smelting process of the smelting furnace can be effectively removed.

The invention relates to a respiratory protective mask, and the mask consists of a base mask body, which is held in position by means of an elastic fastening strap and in which a filter material of a preferably FFP3 quality grade is fitted on a circumferential surface in an air-tight manner; the mask has a circumferential sealing portion which encloses the outer edge of the base mask body and thus ensures a 100% seal of the base mask body with respect to the face skin surface, in particular in the area of the nose and at the chin.

The invention discloses a preparation method for preparing a novel environment-friendly non-toxic dust-free high-quality seashell chalk from waste shells, and the method comprises the following steps: 1, cleaning the waste shells with clear water, bleaching in hydrogen peroxide, and performing drying in an environment of 100 DEG C; 2, crushing the shells dried in the step 1 into 200-300 meshes by using a mechanical stirring crusher, and performing calcining at 900-950 DEG C for 130-150 minutes to obtain calcium oxide powder; 3, introducing carbon dioxide gas at a proper rate on the basis of the step 2, continuously performing heating, and performing reacting to obtain calcium carbonate powder with higher purity; 4, heating glycerol and water according to a ratio of 1: 60 to prepare a milky white solution, and fully mixing the milky white solution with polyvinyl alcohol according to a certain ratio by utilizing the loose and porous structural characteristics of shell powder, so when teachers and students use the chalk, serious damage of dust generated by the chalk to skins and respiratory tracts can be reduced, and the practicability of the seashell chalk is greatly improved.

The invention relates to a method for preparing non-toxic dust-free high-quality shell chalk from discarded shells, belonging to the technical field of production of the teaching tool--chalk. The preparation method comprises the following steps: calcining washed shells at a temperature of 850 DEG C for 120 minutes to obtain calcium oxide powder; introducing carbon dioxide and continuing calcination to obtain high-purity calcium carbonate; and mixing diol and water according to a ratio of 1: 40 to form a water-soluble binder, then carrying out molding in a mold, and performing drying to obtainthe high-quality shell chalk. The chalk prepared by using the method effectively reduces chalk dust in the air, does not corrode the skin of teachers' fingers, and protects the health of teachers andstudents.

The invention provides an environment-friendly treatment device for fluoride and toxic dust in electrolytic aluminum waste gas, and mainly relates to the technical field of treatment of fluoride and toxic dust in electrolytic aluminum waste gas. The environment-friendly treatment device for fluoride and toxic dust in electrolytic aluminum waste gas comprises a box body, a first vertical plate and a second vertical plate are installed in the box body, a motor is installed on one side of the top face of the box body, a stirring shaft is installed at the bottom of a rotating shaft of the motor, stirring plates are installed on the two sides of the bottom of the stirring shaft, a first gas inlet pipe is installed on one side of the box body, a feeding port is formed in one side of the top of the box body, a heating plate is installed at the top of the second cavity, and a first electrode and a second electrode are installed on the two sides of the second cavity correspondingly. The treatment device has the beneficial effects that fluoride and toxic dust in electrolytic aluminum waste gas can be treated, the fluoride and the toxic dust in the electrolytic aluminum waste gas are prevented from being directly discharged into the atmosphere, pollution to the atmosphere is avoided, and environmental protection is improved.

The invention relates to an anti-haze mask, and belongs to the field of medical equipment. The anti-haze mask comprises a mask main body, a mask body connected with the mask main body, a filter disc placement cavity and a drug bag placement cavity which are arranged between the mask main body and the mask body, a filter disc arranged in the filter disc placement cavity, a drug bag arranged in thedrug bag placement cavity, a nose beam depression bar arranged on the inner side of one side of the mask main body, ties symmetrically arranged at both ends of the mask main body and a socket arrangedon one side of the mask body. According to the anti-haze mask, a filter layer is arranged, and can effectively filter out toxic dust integrated into the floating water droplets in haze; a core layernanomaterial membrane is arranged, and can effectively block PM2.5 particles; the drug bag is arranged, and the functions of clearing lung and pharynx are achieved; the anti-haze mask has the advantages of simple structure, convenient replacement, good bacteriostatic effect, long service life, environmental protection and the like.

The invention discloses a mist spraying chamber for removing active or toxic dust particles adhered to the surface of clean clothes in the technical field of mist spraying chambers. The mist spraying chamber comprises a mist spraying chamber, movable doors, a water pump, a heating box, an electric control box, a touch screen, an emergency stop button, a switch, a rotary joint, a servo motor and an exhaust fan, the exhaust fan is arranged on the right side of the outer wall of the top of the mist spraying chamber, the movable doors are arranged on the front side and the rear side of the mist spraying chamber, a mounting frame is arranged in the middle of the outer wall of the right side of the mist spraying chamber, and the water pump, the heating box, the emergency stop button and the touch screen are sequentially arranged on the front end face of the mounting frame from bottom to top. When a worker goes out of a workshop, the worker must pass through the mist spraying chamber, and at the moment, the servo motor can drive a rotating rod, a gear and a steel pipe to rotate, the steel pipe drives a transverse water pipe and vertical water pipes to rotate, a water system is composed of the water pump, a pipeline, a valve, a sensor and the like and supplies water to the mist spraying chamber, a mist spraying system is provided with a fine water mist mode and a large water mist mode, and rotationally-arranged spray heads sufficiently spray water to personnel on the inner sides of the two sets of vertical water pipes.

The invention discloses a preparation method of porous tantalum as a medical metal implant material. The preparation method comprises the steps of: preparing tantalum powder slurry by using tantalum powder and a solution prepared from ethyl cellulose and absolute ethyl alcohol, casting the slurry into organic foams, immersing the organic foams until pores of the organic foams are fully filled with the tantalum powder slurry, then, drying to remove dispersants in the organic foams cast with the tantalum powder slurry, performing degreasing treatment in an inert gas protective atmosphere to remove organic binders and the organic foams, sintering under vacuum to obtain a porous sintered body, annealing under vacuum, and performing conventional treatment to obtain the porous tantalum, wherein the tantalum powder has the average particle size being smaller than 10mum and the oxygen content being smaller than 0.1%. The porous tantalum as the medical metal implant material prepared in the invention has a very good biocompatibility and better mechanical performance, and is particularly suitable for being used as the medical implant material for a connecting component at scapulae, skull and facial bones with tissue trauma and damages. Meanwhile, the preparation method is simple in process and easy to control; and an entire preparation process is harmless and has no pollution and no toxic dust, and the porous tantalum has no side effects to human bodies.

The invention discloses a staged air purification treatment device for workshop dusts, and relates to the technical field of air purification devices. The device comprises a box body, and pretreatment boxes are arranged at two sides of the box body; a filter box and a suction fan are respectively arranged at one side of the box body; the air inlet of the suction fan is communicated with the bottom of the filter box; a nano-bubble generator is arranged at the bottom of the inner wall of the box body; a water pump is arranged at one side of the box body; the water outlet end of the water pump is communicated with a water guiding tube; one end, located at the top of the inner wall of the box body, of the water guiding tube is communicated with an annular conduit; spray heads are arranged on the circumferential side surface of the annular conduit; and PP water is arranged inside the box body. Dusts in workshop air undergo staged filtering and purifying treatment by the pretreatment box and the filter box, and the purified and filtered air in water generates nano-bubbles, and is sufficiently reacted with the PP water to carry out sterilization and disinfection. The device sufficiently removes harmful substances in the air, improves the quality of the workshop air, reduces the harms of toxic dusts to workers' bodies, and protects the working environment of workers.