41results about How to "High purification precision" patented technology

The invention belongs to the technical field of catalysts and especially provides a wide-temperature high-efficiency NOx removal catalyst for ammonia selective catalytic reduction and a preparation method thereof. The catalyst consists of an active component, an auxiliary agent and a carrier. The weight of the active component accounts for 2%-10% of the weight of the catalyst, and the weight of the auxiliary agent accounts for 0.5%-7% of the weight of the catalyst. The active component is composed of a cupric oxide and/or a manganese oxide; the auxiliary agent is a mischmetal, a rare earth oxide or a transition metal oxide; and the carrier is Al2O3 or TiO2-Al2O3. The catalyst is particularly prepared by the steps of a drying operation and a roasting operation at a proper temperature. An NOx removal process at a wide temperature zone ranging from 100 DEG C to 400 DEG C can be achieved by the catalyst of the invention; meanwhile, the catalyst can be repeatedly used in normal after being washed and regenerated for several times in a nitrate tail gas denitration technology, and the catalytic intensity and the denitration performance are not decreased obviously. The catalyst of the invention is industrialized and has excellent industrial application prospect.

The invention discloses a device for purifying polysilicon by using a high energy beam, comprising a vacuum chamber, a vacuum electromagnetic induction smelting unit, an electron beam smelting unit, a plasma smelting unit and a directional solidification unit. The vacuum electromagnetic induction smelting unit is arranged on a concave surface of the vacuum chamber; an A electron gun of the electron beam smelting unit is arranged on a left inclined plane of the vacuum chamber and a B electron gun is arranged on a right inclined plane of the vacuum chamber; an A plasma gun of the plasma smelting unit is arranged on a left shell body of the vacuum chamber and a B plasma gun is arranged on a right shell body of the vacuum chamber; a connecting base of the directional solidification unit is arranged on a separator of the vacuum chamber; the invention aims at providing a device for purifying the polysilicon by using the high energy beam which integrates four technologies of the vacuum electromagnetic induction smelting, the plasma smelting, the electron beam smelting and the directional solidification; the purifying device carries out vacuum electromagnetic induction smelting, plasma smelting, electron beam smelting and directional solidification sequentially for silicon metal of 99.9 percent to obtain the polysilicon with a purity of 99.9999 percent which is used for producing solar batteries. The invention solves the defects of large equipment input, high cost, large energy consumption and serious environmental pollution in the prior chemical methods for producing solar grade silicon.

This invention relates to variable voltage absorbing separating recovery method of vinyl chloride and acetylene mixed gas. Each absorbing tower through the variable absorbing cycle process of absorbing, inverse disperse, evacuation and final boosting procedures is done. The mixed gas is processed at least two variable voltage absorbing unit, discharged gas processed by front unit in turn entering next nearby absorbing unit to get vinyl chloride and acetylene product gas. at least two absorbing tower are contained in each variable voltage absorbing unit, absorbing agent in the first tower at least contains alumina, at least one of average aperture 1-3mm silica gel or molecular sieve is contained in last variable voltage absorbing unit. This method is propitious to process mixed gas that contain more C2H3Cl and C2H2, it can make C2H3Cl and C2H2 concentrate 2-200 times, and make C2H3Cl and C2H2 be separately separated, recovered and used by the mixed gas. C2H3Cl and C2H2 in detergent effluent gas can reach environmental protection request.

The invention discloses a method for preparing cyclopentene and cyclopentene of high purity by using coarse pentadiene got from petroleum cracking ethylene by-product carbon five separation. Feeding the coarse pentadiene into extraction tower in existence of polymerization inhibitor, getting mixing material of cyclopentene and cyclopentane in the tower top, extracting agent and pentadiene being in the tower still; feeding the material got in tower top to the first fractionating tower, stipping light component in tower top, getting mixing material of cyclopentene and cyclopentane in the tower still; feeding the material got from the first fractionating tower still into the second fractionating tower, getting cyclopentene of above 99% in tower top, and cyclopentane in tower still; feeding the material got from the second fractionating tower still into the third fractionating tower, steeping the heavy component in the tower still and getting the cyclopentane product in tower top. The invention employs extractive distillation method and is characterized by the high extraction accuracy, stable product quality and easy for industrial production.

The present invention relates to intelligent oil-containing sewage treatment equipment for cleaning oil-containing sewage. It includes an emulsion-breaking atomizer and an oil-water separator. The described emulsion-breaking atomizer is characterized by that its upper portion is equipped with a feedwater pipe, an oil-discharging pipe and a sensor, its top portion is equipped with an air-discharging pipe and its bottom portion is equipped with a liquor-discharging pipe which can be used for discharging liquor into the oil-water separator. The bottom portion of said emulsion-breaking atomizer also is equipped with a drain pipe and its centre possesses a resilient device on which a micropore tube is set. The upper portion of the above-mentioned oil-water separator is equipped with a liquor-feeding pipe, an oil-discharging pipe and a sensor, the described liquor-feeding pipe is connected with the above-mentioned liquor-discharging pipe, its top portion is equipped with an air-discharging pipe, its lower portion is equipped with a clean water pipe and its bottom portion possesses a drain pipe.

The invention discloses a production process of high-purity gold, and relates to the technical field of metal refining. The production process comprises the following steps that: S1, gold is dissolvedin aqua regia, wherein crude gold is added to aqua regia and dissolved to make a solution, and after nitrate is removed, filtering is conducted to obtain a crude gold solution; S2, reduction is conducted, wherein a reducing agent is added to the crude gold solution obtained in S1, filtering is conducted to obtain primary fine gold powder, and the primary fine gold powder is washed with pure wateruntil the primary fine gold powder is neutral; S3, acid leaching is conducted, wherein the primary fine gold powder obtained in S2 is put into a nitric acid solution, soaked and then filtered, and pure fine gold powder is obtained; and S4, gold smelting is conducted, wherein the pure fine gold powder obtained in S3 is washed with pure water, dried, inspected, and used for preparing the high-purity gold product through ingot casting after being inspected to be qualified. The production process has the technical effects of high production safety, short process flow period and good controllability.

The invention discloses a new technology and a system for preparing high-purity carbon monoxide by temperature control transformation and a system. The new technology includes the steps: buffering storage, compressing water rings, exhausting dust by a wet method, compressing gas, firstly purifying, secondly purifying, desorbing CO2, concentrating CO, refining CO and filling. By the new technology, feed gas is roughly purified by temperature control transformation to refine carbonic oxide, the new technology solves the problem of high cost of a traditional refining method of formamide decomposition, formic acid decomposition and the like and is simple in refining process, high in refining precision, low in cost and convenient to use.

The invention discloses lead paste purification equipment for lead-acid battery recovery and a purification method of the lead paste purification equipment. The lead paste purification equipment comprises a workbench, a purification box is fixedly arranged on the table top of the workbench, a material taking mechanism is fixedly arranged on one side of the back face of the workbench and located above the purification box, and a spiral conveyor, a feeding frame and a feeding tank are arranged on the right side of the workbench; the feeding end of the spiral conveyor is connected with a discharging port of the feeding frame, the discharging end of the spiral conveyor is connected with a feeding port of the feeding tank, and the feeding tank is connected with the purification box through a communicating pipe. A plurality of purification cavities are formed in the purification box, purification frames are arranged in the purification cavities, and a plurality of purification cylinders are arranged on the purification frames; in other words, a flocculating agent is added into the purification box, so that the lead plaster solution enters the purification cylinder in the purification box, precipitation of the lead plaster solution is realized in the purification cylinder, precipitation of the lead plaster in the purification box belongs to an independent environment is realized, oscillation is reduced, and purification precision is improved.

The invention discloses a gas filter applicable to a float type pneumatic measuring instrument. The gas filter comprises a gas filter shell, a water guide plate, a flow guide plate, a multifunctional switch, a gas pipe, a gas source input joint, a gas filter shell cover, a gas source output joint, a filtration plate, a bolt, a filter element, an upper hollow bolt, a sliding block, a spring, a lower hollow bolt, a water discharging bolt, a bracket, an anti-explosion plate and a pressure gage. The gas filter is characterized in that the multifunctional switch is arranged; when the multifunctional switch is in one position, gas enters the gas filter through the switch; after the multifunctional switch is rotated by 180 degrees, the gas filter is connected with the atmosphere, the water flows into a water storage chamber from the gas filter; the gas is filtered for three times in the gas filter through crude, middle and high filtration cups of the filter element and the filtration plate; the anti-explosion plate is capable of effectively avoiding the harm to the human body and equipment when accidents happen; and three filters which are connected in series can guarantee the quality of the filtered air.

The invention relates to the blending extraction process of rhubarb and monkshood in compound Chinese medicine Xiaokening. The blending extraction process of the rhubarb and the monkshood comprises the following steps: mixed powder of the rhubarb and the monkshood is dipped in 6-15 times water for 2-8 hours; and then soak pollution is extracted twice under the assistance of microwave; after extraction liquid is centrifugal and filtered, double extractive supernatant fluids are combined and concentrated till the concentration of drug ingredients is 0.05-0.5g/ml, added with a macroporous resin column for adsorption; firstly, the macroporous resin column is washed with water, and then eluted with ethanol with gradient concentrations; ethanol eluent with 50-80 % of concentration is combined; ethanol is recycled; the blending extractive of the rhubarb and the monkshood is prepared by concentration. The blending extraction process organically combines the microwave assistance extraction process and the macromolecule absorption process and has the technology characteristics of high extraction rate and high purification precision. As the production is safe, reliable, and free from contamination, and the production line composition is simple, the investment is saved.

The invention provides a system and method for preparing methanol by deeply purifying coke oven gas, and belongs to the field of coke oven gas purification. The pre-washing tower is arranged as a supergravity rotating device, so that the coke oven gas subjected to benzene removal can be subjected to primary impurity removal in the pre-washing tower through a supergravity rotating technology, harmful substances such as dust, benzene, tar, naphthalene, ammonia and sulfur in the coke oven gas are deeply removed, and the problem that the stable operation of a system is influenced after sulfur and ammonia in the coke oven gas exceed the standard is solved; and the problems that tar and naphthalene in the coke oven gas can cause blockage of a compression system, and the operation cost of fine desulfurization is increased due to abnormal coarse desulfurization are solved. Through pretreatment, the coke oven gas does not need to be desulfurized after returning to the coke oven, so that the investment of a flue gas desulfurization device and the generation of desulfurization waste liquid can be reduced. The hydrogen-carbon ratio of the synthesis gas is adjusted through a conversion technology to ensure that hydrogen and carbon in the coke oven gas can be utilized to the maximum extent, so that the yield of methanol can be increased.

The present invention discloses a spherical graphite purification furnace, which comprises a thermal insulation housing, a top cover, a bracket, a rotation shaft and a base, and is characterized in that the inner wall of the thermal insulation housing is provided with an infrared heating layer, the thermal insulation housing and the top cover are movably connected and are fixed by using a snapping buckle, the thermal insulation housing is spherical, both ends of the thermal insulation housing are connected to the rotation shaft, the outer side of the rotation shaft is connected to the bracket, and the bottom portion of the bracket is connected to the base. According to the present invention, with the rotation shaft, the spherical graphite purification furnace can rotate during the working, such that the heating area is uniform, and the purification precision is high; and with the control panel, the rotation speed of the rotation shaft and the temperature of the infrared heating layer of the spherical graphite purification furnace can be precisely controlled, such that the graphite purification precision is improved, and after completing the purification, the inclination angle of the spherical graphite purification furnace can be controlled so as to conveniently collect or pour out the purified graphite.

The invention discloses a centrifugal type preposed filtering device. The filtering device comprises a top plate, and a bottom plate and side plates which are fixedly connected with the top plate. The filtering device also comprises a filtering unit, wherein the filtering unit comprises blade hole plates, blind plates and Z-shaped groove plates; one side edge of each blade hole plate coincides with one edge of the corresponding blind plate, the lower end part of the coinciding edge of the blind plate is connected with one Z-shaped groove plate through a rivet, and the other side edge of the blade hole plate is connected with another blind plate adjacent to the blind plate; the blind plates and the blade hole plates are sequentially connected to form an M-shaped structure. Since the filtering device is made from galvanized plates or stainless steel plates and the distribution of filtering holes conforms to the gas flowing principle, the filtering device has the advantages of being high in purification efficiency, free form replacement of filtering elements, low in operation resistance and convenient to clean and maintain.

The invention relates to the technical field of potassium feldspar machining, and discloses a potassium feldspar tailing purifying device and a purifying process based on the potassium feldspar tailing purifying device. The potassium feldspar tailing purifying device comprises a sorting machine body, and a distributor is arranged in the sorting machine body. A feeding device is arranged on the upper portion of the distributor. The feeding device comprises a feeding tank and a feeding pipe, and a plurality of guide plates are arranged in the feeding pipe. A plurality of gears capable of rotating are arranged at the ends of the guide plates side by side. A feeding plate corresponding to the distributor is arranged on the inner wall of the sorting machine body, a clearance is arranged betweenthe lowest guide plate and the upper surface of the distributor, and the height of the clearance ranges from 10 mm to 20 mm. According to the potassium feldspar tailing purifying device, raw materials can be divided and arranged on the distributor side by side, and therefore the problem that the raw materials are uneven in distribution and are even stacked together is avoided, and the detection accuracy can be improved. When the lower portions of the gears are clamped, the raw materials are in contact with the upper portions or sides of the gears, the gears can be driven to rotate, and therefore the raw materials clamped on the lower portions of the gears are moved, and the problem of material clamping is solved. According to the potassium feldspar tailing purifying device and the purifying process based on the potassium feldspar tailing purifying device, the detection efficiency is improved, and the detection accuracy is improved.

The invention relates to a water quality purification tank system, comprising a water inlet, a water outlet, a first purification tank, a second purification tank and a third purification tank, wherein the interior of the first purification tank is provided with at least two layers of first filter screen, one side of the lower end of the first purification tank is provided with an air inlet, water supply pipes are arranged among the first purification tank, the second purification tank and the third purification tank, water outlet ends of the water supply pipes are located at the upper ends of tank bodies, water inlet ends of the water supply pipes are located at the lower ends of the tank bodies, the water supply pipes are provided with a first-grade detection gauge and a second-grade detection gauge, the interior of the second purification tank is provided with a plurality of adsorption balls with a certain diameter, the interior of the third purification tank is provided with at least two layers of second filter screen, and the water outlet is positioned at the upper end of the third purification tank. The water quality purification tank system has a simple structure and is reasonably designed; through arrangement of the first purification tank, the second purification tank and the third purification tank, multistage multistep purification and high purification precision of water can be realized.

The invention provides a surfactant P-1000 formula, and a surfactant P-1000 is high in purification precision and convenient to operate. The surfactant P-1000 comprises 1000 parts of PEG1000, 196 parts of MA, 800 parts of E-51, 196 parts of phosphoric acid, 12 parts of tetrabutylammonium bromide and 60 parts of water. The surfactant P-1000 with the formula disclosed by the invention is high in purification precision, convenient to manufacture and operate and low in cost.

The invention belongs to the technical field of preparation of isomeric stearic acid, and in particular relates to a method for preparing isomeric stearic acid by means of freezing crystallization andfractionation. According to the low temperature performance of the isomeric stearic acid, aliphatic carboxylic acid subjected to a polymer reaction is put into a low-temperature cold storage, so thatcrystals of the isomeric stearic acid can be obtained; in separation and purification processes, heating steps are fewer, so that less hot steam is produced in the purification process; compared withthe existing separation and purification steps, the method is more environmentally friendly; furthermore, the method is less in number of used equipment and simple to operate, thus being both lower in economic cost and labor cost.