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48 results about "Post washing" patented technology

Main grid electrode structure of solar cell and preparation method thereof

The invention belongs to the technical field of a solar cell, and particularly relates to a main grid electrode structure of a solar cell and a preparation method thereof. A positive electrode comprises a thin grid silver electrode; metal wires are printed on the metallized thin grid silver electrode; and the metal wires are connected with the silver electrode by adhering points. The preparation method comprises the steps of: by adopting a silk-screen printing process, printing the thin grid silver electrode on the positive surface of a P-type silicon matrix processed by processes of texturing, diffusion, post washing, coating and printing of a back field of a back electrode; and then printing a metal wire main grid electrode on the surface of the metallized silver electrode, wherein the metal wires are connected with the silver electrode together by the adhering points. The main grid electrode structure for the solar cell and the preparation method thereof, which are disclosed by the invention, have the advantages that a copper electrode replaces a positive main grid silver electrode so as to reduce the use quantity of the silver electrode of the positive electrode of the silicon solar cell, thereby reducing production cost of the silicon solar cell; and additionally, the copper electrode is used for replacing burn-through silver paste so as to reduce breakage and replacement of a passive film, improve surface passivation efficiency and improve cell efficiency.
Owner:TAIZHOU LERRISOLAR TECH CO LTD

System for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol

The invention relates to a system for producing 2,3,5,6-4-methoxymethyl-tetrafluorobenzyl alcohol, which comprises a toluene material storage tank, a dimethyl sulfate material storage tank, a diol-alkali aqueous solution storage tank, a first heat exchanger, a mixer, a microchannel reactor, a first-stage layering tank group, a second-stage layering tank group, a washing mixer, a post-washing reaction liquid receiving tank, a second heat exchanger, a continuous desolventizer, a methylbenzene recovery tank, and a final product tank. A preparation process includes the following steps: a diol-alkali aqueous solution is prepared for later use; the diol-alkali aqueous solution is heated, dimethyl sulfate and toluene are mixed and heated, the diol-alkali aqueous solution and the dimethyl sulfate-toluene solution simultaneously enter the reactor and are mixed to react, reaction liquid undergoes layering and washing treatment, the washed reaction liquid is distilled to recover the toluene, and thereby crude benzyl alcohol is obtained. Continuous production is realized, the reaction rate is higher than the conventional reaction rate, the reaction time is short, the efficiency of production is high, the production of the byproduct diether is reduced, production yield is increased, and consumption in production is reduced.
Owner:中山致安化工科技有限公司

Production method of basic cobalt carbonate

The invention discloses a production method of basic cobalt carbonate. The method realizes efficient pollution-free production of basic cobalt carbonate. The production method comprises the following steps of: a, preparing a Na2CO3 solution; b, synthesizing; c, ageing; d, performing primary filter pressing and washing; e, performing secondary filter pressing and washing; and f, drying. The method is simple in technical process and can be used for quickly producing basic cobalt carbonate; meanwhile, the product quality can be adjusted well by controlling the stirring speed, the reaction temperature and the adding speed of cobalt chloride, an effect of uniform particles is achieved, and the content of cobalt can reach 52%; meanwhile, an additive, namely sodium ascorbate, is added into washing water during reaction to prevent oxidization of the product and is easy for filter pressing; and moreover, the content of impurities in the product is reduced by washing the product with deionized water for many times, and post-washing water can be recycled if being treated. Therefore, the whole production flow is simple in operation and low in cost, the production efficiency is increased while the labor intensity is lowered, and moreover, the method is free of environmental pollution and can be used for large-area popularization.
Owner:赣州逸豪优美科实业有限公司

Method of preparing vanadium pentoxide by using vanadium-containing solution

The invention discloses a method of preparing vanadium pentoxide by using a vanadium-containing solution. The method is characterized in that the method consists of the following steps: a pH value of the vanadium-containing solution is adjusted, magnesium chloride and calcium chloride are added, solid-liquid separation is carried out and silicon-phosphorus residues and a solution are obtained; multistage countercurrent extraction is carried out and a load organic phase and a raffinate phase are obtained; a sodium-containing back-extractant and the load organic phase carry out primary washing, and post-washing liquid and a post-washing organic phase are obtained; and an ammonium-containing back-extractant and the post-washing organic phase carry out primary reextraction, and ammonium-containing vanadium-rich liquid and a half-load organic phase are obtained; the post-washing liquid and the half-load organic phase carry out countercurrent reextraction for many times, and sodium-containing vanadium-rich liquid and a no-load organic phase are obtained; pH values of the ammonium-containing vanadium-rich liquid and the sodium-containing vanadium-rich liquid are adjusted, NH4Cl is added, the solid-liquid separation is carried out and ammonium metavanadate is obtained, and ammonium metavanadate is calcined and then vanadium pentoxide with the grade being greater than or equal to 99.5% and vanadium pentoxide with the grade being 99.9% are obtained. The production operation is simple and feasible, the cost is low, and a recovery rate and the purity are high.
Owner:广东省资源综合利用研究所

New method for washing chlorine of nickelous hydroxide

InactiveCN105274333AVersatilitySimplify the slag washing processProcess efficiency improvementAlkaline waterSulfate
The invention discloses a new method for washing chlorine of nickelous hydroxide and related equipment of the new method. The method and equipment are used for continuous washing of the nickelous hydroxide and other solid slag. The equipment is cylindrical, a to-be-washed material inlet and a post-washing water overflow outlet are formed in the upper end of the equipment, and a washed material outlet and a washing water inlet are formed in the lower end of the equipment. Materials flow downwards, washing water flows upwards, and then continuous backwashing is achieved. According to the method, the solid nickelous hydroxide is ground and pulpified to be pumped into the to-be-washed material inlet of the slag washing equipment, and meanwhile alkaline water is pumped into the washing water inlet for slag washing. In the existing nickel wet metallurgy, the influence of the electrodeposition of chlorine on nickel sulfate is very large, chlorine can be generated and pollute the environment, and a pole plate can be corroded. Thus, chlorine washing treatment needs to be carried out on the nickelous hydroxide of a finished product with high chlorine content in the front section. According to the new method, the input expense of the equipment can be reduced, the slag washing water amount is reduced, and cost is reduced; and the slag washing effect can be improved, and the nickel-chlorine ratio is increased.
Owner:夏栋

Method for technically controlling washing twisting of garment products due to weft skewing of fabrics

The invention relates to a method for technically controlling washing twisting of garment products due to weft skewing of fabrics. The method includes steps of (1), starting to shear certain portionsof the fabrics, manufacturing a left trouser leg and a right trouser leg with the sizes of 50*50 cm from each fabric, carrying out pre-washing and post-washing tests and recording pre-washing and post-washing sizes; (2), carrying out pre-washing and post-washing twisting rate tests; (3), adjusting twisting angles; (4), carrying out trouser leg tests on bulk products, carrying out summarizing pieceby piece according to different twisting rates, and adjusting the twisting angles of paper patterns for discharging; (5), adjusting grain lines on the paper patterns according to the twisting rates and twisting directions and adjusting pattern grain lines according to twist in the same direction; (6), discharging the bulk products according to new adjusted grain lines. The certain portions, whichare about to be shorn at the step (1), of each fabric are separated from radial yarn plain edges by the breadths of 5-7 cm. The 1/2 of the sum of the corresponding twisting rates of each left trouserleg and the corresponding right trouser leg is equal to a twisting degree of the corresponding fabric. The method has the advantages that the problem of twisting of ready-made garments can be solvedby the aid of the method, the production and work efficiency can be enhanced, and fabric test and labor costs can be saved; the appearance quality of products can be enhanced, the brand adhesion degrees can be upgraded, and the brand awareness can be improved.
Owner:ZHEJIANG HAIMING IND CO LTD

Method for recovering zinc from acid pickling waste liquid by using solvent extraction

The invention discloses a method for recovering zinc from acid pickling waste liquid by using solvent extraction, and solves a current problem that a high-quality zinc product cannot be obtained fromhigh-concentration acidic waste liquid containing zinc and iron ions. The method comprises the following steps: firstly reducing the acidic waste liquid containing the zinc and iron ions through ironpowder, and reducing ferric iron in solution; after reduction, filtering the acid pickling waste liquid, to obtain zinc extraction pre-liquid; extracting the zinc extraction pre-liquid, to obtain organic raffinate loaded with zinc chloride; performing impurity washing on the loaded organic, to obtain post-washing organic and post-washing water; performing reverse extraction on the post-washing organic, to obtain regenerated organic and zinc reverse extraction rich solution; deoiling the zinc reverse extraction rich solution, and entering a pH adjusting tank, to obtain a zinc dichlorodiammoniaprecipitate in a section of the pH adjusting tank; filtering, drying, and calcining the zinc dichlorodiammonia precipitate, to obtain high-purity anhydrous zinc chloride, and recovering ammonia. The method is capable of acquiring a high-quality anhydrous zinc chloride product from the acidic waste liquid containing the zinc and iron ions.
Owner:桐乡市思远环保科技有限公司

Scandium recovery process

The purpose of the present invention is to recover roughly purified scandium, which is purified to an extent acceptable for a technique for highly purifying scandium, efficiently and without any complicated operation from a neutralization sediment (drainage sediment) generated in neutralizing acid mine drainage which contains a sulfur component. This scandium recovery process includes a washing step (S1) for washing a neutralization sediment (drainage sediment) and a dissolution step (S2) for subjecting the washed sediment obtained in the washing step (S1) to dissolution in an acid. It is preferable that the process further includes a re-dissolution step (S3) for subjecting a dissolution residue which remains after the dissolution in the dissolution step (S2) to dissolution with an acid. In the washing step (S1), it is preferable that the neutralization sediment (drainage sediment) is washed with a washing liquid until the pH of the post-washing liquid generated in the washing step becomes 6 or higher. In the dissolution step (S2), it is preferable that the washed sediment is dissolved in an acid with the system adjusted to pH 1-4.
Owner:SUMITOMO METAL MINING CO LTD

Water basin allowing wastewater to be reused conveniently

The invention discloses a water basin allowing wastewater to be reused conveniently. The water basin comprises a basin body, buttons, connection rods, presser plates, elastic parts, holders, a plurality of plug strips, a base, and a basin foot. The two sides of the upper end of the basin body are symmetrically provided with mounting holes; the buttons are fixed in the mounting holes; the lower endof each button is fixed to the upper end of the corresponding connection rod; the presser plates are fixedly connected to the middle of the connection rods; the holder is fixed outside the basin body; the middle of each holder is provided with a through hole; the connection rods are passed through the through holes of the holders; the presser plates are positioned at the upper ends of the holders; the elastic parts are positioned between the presser plates and the holders; the connection rods are passed through the elastic parts; the lower ends of the connection rods are fixedly connected tothe base; the plug strips are fixed on the base; the bottom plate of the basin body is provided with a plurality of filter holes; the plug strips fit the filter holes and seal them; the basin foot isfixed to the bottom of the basin body to raise the bottom of the basin body; the base is positioned within the basin foot; the basin foot is provided with guide holes to guide the connection rod to move. The water basin allows post-washing wastewater to be reused.
Owner:YANGZHOU UNIV
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