43results about How to "Meet the purification requirements" patented technology

The invention discloses an indoor gas purification device based on discharge plasma, comprising a shell provided with a gas inlet and a gas outlet, wherein a fan, a dielectric barrier corona discharge processing region and a dust collecting region are arranged in the shell between the gas inlet and the gas outlet. According to the indoor gas purification device, more uniform low-temperature plasma is generated by two discharge units which are arranged oppositely, oxidation processing is carried out on harmful gas in the dielectric barrier corona discharge processing region, heteropolarity charge electrocoagulation and processing are carried out on inhalable particles, the inhalable particles are collected in the dust collecting region, and the device has the advantages that no chemical agent and no physical additive are used, no special gas atmosphere exists, the energy consumption is low, indoor gas purification is realized under barometric pressure, and the effect is good.

The invention relates to a chemical purification method, especially to a copper removal method which is suitable for a nickel electrolysis anolyte purification process. The copper removal method provided by the invention is obviously different from a copper removal method by adding anode mud in nickel ore concentrate as follows: a sodium hydrosulphite solution is added in an iron-removed liquid to activate copper ions and increase reaction probability between copper ions and amorphous nickel sulfide; as amorphous nickel sulfide is added into a copper removal tank in a slurry form, labor intensity is reduced, it is convenient to realize automatic control, and stabilization and continuity of the copper removal process are guaranteed; and as copper slag can directly enter a copper melting system, the technology is optimized, flow of copper impurity in the system is shortened, copper slag is processed not by the use of chlorine, and the environment is improved. Through detection, a copper-removed liquid contains 0.4-2.5ppm of copper. Thus, purification requirements are met. The mass ratio of copper to nickel in the copper slag is 15-17. The copper slag can be directly melted to produce anode plates.

The invention relates to a method for purifying montmorillonite from bentonite ore by using double dispersion method; the method adopts the hydrogen peroxide as dispersant of 'I'-shaped structure, then the hydrogen peroxide is fully mixed with the pulp so as to cause the hydrogen peroxide to be completely infiltrated into each film layer of the 'I'-shaped structure, later sodium pyrophosphate dispersant is added and conclusion is opened so as lower the pulp viscosity, ease the impurities gravity settlement, and provide a relatively 'smooth' path for the impurities settlement inside and outside the 'I'-shaped structure. As the added gas dispersant is provided with stronger oxidation, the hydrogen peroxide is decomposed into gas under slightly-heating circumstance, and the gas is expanded for distracting the 'I'-shaped structure so as to cause the hidden impurities to be precipitated due to the loss of support, thereby eliminating a small amount of organic substances in the natural bentonite by oxidation and simultaneously playing a bactericidal action, and purifying montmorillonite by separation as any pollution is not brought. The method is non-toxic, has simple operation process, and can easily achieve batch production.

The invention discloses a foam ceramic composite filtering method for a high-temperature alloy in a centrifugal field. The method comprises the following steps: (1) prefabricating a special-shape refractory ceramic runner combining a sprue and an outlet channel vertical to the sprue, and placing multiple foam ceramic filtering sheets in the outlet channel of the runner; (2) superposing the axis of the sprue on the rotation axis of a centrifuge device; (3) before pouring, preheating the runner and the foam ceramic sheets to over 1000 DEG C; and (4) starting the centrifuge device to rotate the runner, wherein the rotation speed of the centrifuge device ranges from 10 r/min to 3,000 r/min; and pouring the high-temperature alloy melt which passes through the foam ceramic filtering sheets under the action of centrifugal force. The invention has the advantages that: the method is simple and convenient to operate; and after the high-temperature alloy is purified, the removal rate of oxides larger than 1 mu m can reach over 90%, and the purification requirements on the mother alloy or returns of the high-temperature alloy in the manufacturing of modern aircraft engines are completely met.

An iron-based crucible protection composite coating for refined aluminum purification comprises an isolation layer and an abrasion reduction layer. The isolation layer comprises aluminum oxide serving as refractory aggregates and aluminum dihydrogen phosphate serving as bonding agents. The abrasion reduction layer comprises boron nitride serving as refractory aggregates, polyvinyl alcohol serving as thermal expansion buffering agents and aluminum dihydrogen phosphate serving as bonding agents. By means of the composite coating, the problem of cracks of acoating layer caused by large differences between thermal expansion coefficients of coatings formed by single substance and blending agents and the iron crucible in the prior art is solved. The composite coating has the advantages that the strength and the compactness are high, and de-molding can be performed easily.

The invention provides a high-purity minicircle DNA (deoxyribonucleic acid) and a preparation method and application thereof. The preparation method includes the steps: 1) providing a parental plasmid containing a target sequence, wherein the parental plasmid has a specific recombination site, a nucleotide sequence of a skeleton DNA and a nucleotide sequence of the minicircle DNA; 2) transferring the parental plasmid to a host cell, inducing the parental plasmid to generate the minicircle DNA and the skeleton DNA containing the target sequence under the action of site-specific recombination; 3) subjecting the host cell to lysis, and subjecting plasmids to prepurification to obtain mixed plasmids including the minicircle DNA, the parental plasmid containing the target sequence and/or the skeleton DNA containing the target sequence; 4) removing the parental plasmid containing the target sequence and/or the skeleton DNA containing the target sequence from the mixed plasmids according to a tri-spiral purification method to obtain the high-purity minicircle DNA.

The invention relates to a method for segregation purification of metal aluminum. The method comprises the steps of: forming supercooling at the periphery and top of molten aluminum in a vacuum environment by accurately controlling the thermal field of the molten aluminum in a crucible, pushing the solidification interface from the periphery to center and from the top to the bottom by controlling a proper cooling rate, enriching impurity elements in the melt at the bottom center of the crucible by ingredient segregation, and opening a device at the crucible bottom to discharge the unsolidified molten aluminum at the lower part of the crucible when the impurity elements are enriched to a certain degree, so as to purify the solidified metal aluminum; and then keeping heating and repeating the purification process, thus enhancing the purification effect by several times of continuous purification processes with low energy consumption. According to the invention, the purification requirements can be achieved, the purification efficiency is increased and energy is saved.

The invention relates to a zinc and zinc alloy melt foamed ceramic centrifugal compound purification device. A rotatable pouring channel is made from a heat-resisting steel and consists of a sprue and a runner vertical to the sprue, and the runner is multiple symmetrical channels and keeps in balance around a rotational center; and a flow collection groove is also made from the heat-resisting steel, is in an annular structure and is arranged below a water outlet of the rotatable pouring channel, the water outlet of the rotatable pouring channel extends into the flow collection groove by above 20mm, the rotatable pouring channel is coaxially connected with a motor, and the runner of the rotatable pouring channel is respectively connected with multi-stage foamed ceramic filter sheets. The zinc and zinc alloy melt foamed ceramic centrifugal compound purification device has the substantive features and the creativity, is simple, is low in cost, is not in environmental pollution at all and accords with the modernized green production requirements.

The invention belongs to the technical field of sewage treatment, and particularly relates to a floating wetland. The floating wetland comprises a supporting floating platform and a floating assembly; the floating assembly is installed on the side face of the supporting floating platform; the floating assembly comprises a floating platform, a planting pot, a nutrition cylinder and a sealing cover; the floating platform is installed on the side face of the supporting floating platform, the planting pot is fixedly connected to the top face of the floating platform, a plurality of through holes are formed in the bottom face of the planting pot and the bottom face of the floating platform, a plurality of nutrition cylinders are fixedly connected to the bottom face of the planting pot, a plurality of diffusion holes are formed in the side walls of the nutrition cylinders, and sealing covers are installed on the top faces of the nutrition cylinders through bolts; the floating wetland floats in the water body of the river channel, so that tail water can be well degraded, and the land area is not occupied; and the emergent aquatic plants planted in the floating wetland provide a good growth and reproduction environment for microorganisms in a water area, so that a large number of microorganisms are gathered, the gathered microorganisms can quickly and effectively decompose pollutants in water, and the purposes of improving water quality and ecological management are achieved.

The invention provides a dyeing wastewater treatment method, belongs to the technical field of wastewater purification, and solves the problem that in the prior art, flocculating discharge in a flocculating tank is not complete. The purpose of the invention can be achieved through the technical scheme: the dyeing wastewater treatment method comprises the following steps: a, flocculating: draining dyeing wastewater into the flocculating tank, and flocculating; b, performing anaerobic treatment: performing the anaerobic treatment on flocculated water by using an anaerobic hydrolysis and acidification device; c, performing microbial treatment: enabling water obtained after the anaerobic treatment to enter a microbial oxidization tank, and performing microbial treatment; d, performing denitrification treatment: enabling water treated by the microbial oxidization tank to enter a denitrification treatment device, and performing denitrification treatment; e, performing deep treatment: performing deep treatment on water treated by the denitrification treatment device by using a deep treatment device so as to finish dyeing wastewater treatment. The dyeing wastewater treatment method has the advantage of complete flocculating discharge in the flocculating tank.

The invention provides a printing and dyeing waste water treating system and belongs to the technical field of wastewater purification. The printing and dyeing waste water treating system solves the problem that the printing and dyeing waste water treating effect is poor in the prior art. The printing and dyeing waste water treating system comprises a flocculating tank, a denitrification nitrogen removal treating device and a deep treating device. The flocculating tank comprises a settling tank, a water inlet pipe is arranged at the top of one side of the settling tank, a water outlet pipe is arranged at the top of the other side of the settling tank, a settling device is arranged in the settling tank, a water inlet partition plate is vertically arranged in the settling tank, the lower side edge of the water inlet partition plate is fixedly connected with the wall of the settling tank through a supporting beam, the two vertical side edges of the water inlet partition plate are fixedly connected with the wall of the settling tank, the water inlet pipe and the water outlet pipe are communicated with the parts, on the two sides of the water inlet partition plate, of an inner cavity of the settling tank respectively, the settling device is located on the part, between the water inlet partition plate and the water outlet pipe, of the supporting beam and located below an opening of the water outlet pipe, a funnel groove bottom is arranged at the bottom of the settling tank, and a flocculating net assembly is arranged in the funnel groove bottom. The printing and dyeing waste water treating system has the advantage of being good in printing and dyeing waste water treating effect.

The invention provides an improved dye vat, and belongs to the technical field of dyeing. The improved dye vat solves the problems that in the prior art, a dye vat can not be automatically cleaned, and dye liquor can not be automatically treated. The improved dye vat comprises a cylindrical vat body. A circular guide rail is fixed to the end face of the open end of the vat body, a sliding block is arranged on the guide rail and can slide along the guide rail, an extension part extending to the inner side of the vat body is arranged on the sliding block, a cleaning roller is rotationally connected to the extension part and is vertically arranged, the circumferential surface of the cleaning roller is attached to the inner wall of the vat body, and a rotating motor driving the cleaning roller to rotate is arranged on the sliding block. The vat body is further connected with a flocculation basin, the flocculation basin comprises a sedimentation basin, a water inlet pipe is arranged at the top of one side of the sedimentation basin, a water outlet pipe is arranged at the top of the other side of the sedimentation basin, the water inlet pipe is communicated with the vat body through a first water pipe, a sedimentator is arranged in the sedimentation basin, and a water inlet partition plate is vertically arranged in the sedimentation basin. The improved dye vat has the advantages that the dye vat can be automatically cleaned, and dye liquor can be automatically treated.

The invention relates to a process and equipment for removing aluminum by complexing chlorosilane. The low-temperature complexing aluminum removal process, the liquid-phase complexing aluminum removalprocess, the gas-phase complexing process and the high-pressure rectifying aluminum removal process are operated independently or in a combined mode to meet different chlorosilane purification requirements. A chlorosilane mixture filtered by the low-temperature complexing stirring tank filter and raw materials conveyed by the raw material buffer tank enter and exit the heat exchanger for heat exchange through low-temperature complexing aluminum removal, and effective utilization of energy is achieved. The low-temperature complexing aluminum removing agent, the liquid-phase aluminum removing agent and the gas-phase aluminum removing agent are long in service life and obvious in complexing aluminum removing effect. According to the process, various complexing aluminum removing agents can beselected for use, and high complexing aluminum removing performance can be kept under the condition of the technological operation range. The aluminum removal rate of chlorosilane is improved, the content of aluminum chloride in chlorosilane is reduced through the low-temperature complexing aluminum removal process and the liquid-phase complexing aluminum removal process, and finally the contentof aluminum in chlorosilane can be reduced to 0.001 ppm or below through the series gas-phase complexing aluminum removal process and the high-pressure rectification aluminum removal process.

The invention discloses a single type photocatalyst air purifier. The single type photocatalyst air purifier comprises a box and a draught fan arranged in the box. An air inlet is formed in one end of the box, an air outlet is formed in the other end of the box, and a photolysis assembly is arranged in the middle of the box. The photolysis assembly comprises a photocatalyst module and an irradiation device located on the outer side of the photocatalyst module, air flows through the photocatalyst module under the action of the draught fan, an ultraviolet lamp tube is adopted for illumination, VOCs make a photolysis reaction with photocatalyst media, and thus the purification requirements of the VOCs are met. Multiple air purifiers can also be connected in series or in parallel through pipelines, so that series-parallel connection multi-stage photolysis is achieved, the staying time of gas in photolysis chambers is prolonged, and the purification capacity is improved. Besides, adjacent air ventilation holes are distributed in a staggered manner, wind resistance is effectively increased, the staying time of air is longer, reaction time is prolonged, and the purification effect is better.

The invention discloses a pretreatment method and system of syngas for synthetic ammonia. The system comprises a dehydration device, a mercury removal device and a cryogenic separation device; the dehydration device is used for cooling and dehydrating the syngas; the mercury removal device is used for mercury removal and purification of the dehydrated syngas output by the dehydration device; the cryogenic separation device comprises a plate-fin heat exchanger group and is used for cooling the purified syngas output by the mercury removal device and outputting low-temperature purified syngas; and the cryogenic separation device further comprises a gas-liquid separation unit, the gas-liquid separation unit is used for carrying out gas-liquid separation on the low-temperature purified syngasoutput by the plate-fin heat exchanger unit to output low-temperature purified gas, and the low-temperature purified gas is heated by the plate-fin heat exchanger unit to obtain purified syngas for synthetic ammonia. Through reasonable arrangement of part structures, impurities in the syngas for synthetic ammonia are efficiently removed, and the impurity gas is made into a CNG product in a rectification and purification mode to be output, so the additional value of the product is increased; and meanwhile, circulating nitrogen is adopted for pressurization and expansion, so the energy efficiency is improved, and the overall device transformation cost and operation consumption are reduced.