84results about How to "Reduce the amount of washing water" patented technology

A steam generation apparatus for a washing machine includes: a case having an accommodating space for storing water; a heater disposed inside the case to heat the water stored in the case; and a heater overheating prevention unit for cutting off power of the heater when the heater is overheated above the set temperature, so that a fire and deflection of a case can be prevented by preventing overheating of the heater by cutting off power being supplied to the heater when the heater is overheated due to malfunctions of a water level sensor or a clogged spray nozzle or a clogged flow passage.

The invention provides a method for preparing germanium dioxide (GeO2). According to the embodiment of the invention, the method comprises the following steps: hydrolyzing the germanium tetrachloride(GeCl4) in a fully-closed hydrolysis reactor to obtain the hydrolysis product of the GeCl4, centrifuging and filtering the hydrolysis product of the GeCl4 to obtain the GeO2 and the filtrate, and cleaning the GeO2 by high-purity water to obtain the high-purity GeO2 and the cleaning solution. According to the embodiment of the invention, the GeO2 hydrolyzing, filtrating and washing method and device have the advantages of high degree of automation, high GeO2 hydrolysis yield, good solid-liquid centrifugal separation effect, low production costs, less metal loss and environment friendliness.

The invention relates to a production method and device of fine-grained low-chloride rare earth carbonate. The production method is mainly characterized in that rare earth chloride and a carbonate solution are added in a concurrent flow feeding way on a designed special precipitation reaction device, the spatial separation of a reaction zone and a crystallization zone is realized by controlling the feeding speed and discharging speed and controlling the aging time of rare earth carbonate, and thus the double purposes of directly obtaining a fine-grained low-chloride rare earth carbonate product from a hydrochloric acid medium by precipitation and realizing continuous production are achieved. By adopting the production method and device provided by the invention, the fine-grained rare earth carbonate product with the chloride content of less than 50ppm can be directly obtained from the hydrochloric acid medium by using cheap ammonium bicarbonate, the precipitation reaction device has a simple structure, and the continuous production can be realized.

The invention relates to high-purity iron phosphate used for producing a lithium ion battery positive-pole material and a preparation method thereof. The preparation method is characterized by comprising the following steps: taking ferrous salt and carbonate as raw materials; reacting to generate intermediate product ferrous carbonate precipitation, wherein, the ferrous carbonate is easy to filter, and the foreign ions are easy to wash; filtering and recovering ammonium sulfate; dissolving the ferrous carbonate precipitation; adding oxidant for oxidizing; regulating the pH value of the solution; heating and preserving the temperature for a certain time to obtain the iron phosphate precipitation; filtering, drying and precipitating to obtain the high-purity iron phosphate; and mixing and calcining the high-purity iron phosphate, the lithium source and the carbon source to obtain the lithium ion battery positive-pole material with excellent electrochemistrical performance. By using the method provided by the invention, the impurity content in the iron phosphate is effectively lowered, the process time is shortened, the energy consumption is reduced, and the cost and the consumption of the raw materials are lowered; and the filter liquor is easy to recover, and the production cost is very low, thus being beneficial for large-scale production in scaled industry.

The invention discloses a phthalonitrile-terminated fluorine structure-containing poly(arylene ether nitrile) oligomer, a phthalonitrile-terminated fluorine structure-containing poly(arylene ether nitrile) condensate, and a preparation method of the oligomer. The phthalonitrile-terminated fluorine structure-containing poly(arylene ether nitrile) oligomer has chain segments with different lengths and a large-volume side group structure, so the oligomer has a low melting point and a good dissolvability, can be dissolved in DMF, NMP and other strong polar solvents, and also can be dissolved in THF, dichloromethane and a toluene and acetonitrile mixed solvent. The phthalonitrile-terminated fluorine structure-containing poly(arylene ether nitrile) condensate has excellent heat stability and mechanical performances, the 5% decomposition temperature in a nitrogen atmosphere is 499-528 DEG C, the residue mass rate at 1000 DEG C is 69-73.2%, and the bending strength is higher than 500 MPa. Thepreparation method of the phthalonitrile-terminated fluorine structure-containing poly(arylene ether nitrile) oligomer is simple and controllable, and can be applied to industrial production.

The invention relates to the field of printing and dyeing, particularly to an activated dye low-alkaline dyeing method for a black regenerated cellulose fiber cheese. The method comprises the steps of pretreatment, dyeing, fixing and follow-up treatment; in addition, low alkaline is adopted in the dyeing and fixing processes and the working procedures are reduced. Therefore, the dyeing temperature of the regenerated cellulose fiber is reduced; the alkaline dosage for dyeing the regenerated cellulose fiber is lowered; the method is simple to operate, short in technical duration, and low in alkaline content in the dyeing waste water, can reduce the dosage of glacial acetic acid for neutralization in the follow-up procedure, lowers washing water volume, saves energy and reduces emission, improves the color fastness of the cheese, and lowers the dyeing cost.

The invention discloses a method for ultrasonic-assisted extraction of olive pomace oil. The method comprises the following steps: 1, preparing an olive pomace oil raw material; 2, adding n-hexane to the olive pomace oil raw material, and carrying out ultrasonic-assisted extraction to obtain crude olive pomace oil; 3, carrying out waterless washing long-mixing depickling treatment on the crude olive pomace oil to obtain depickled olive pomace oil; 4, dehydrating the depickled olive pomace oil to obtain dehydrated olive pomace oil; 5, respectively carrying out primary decoloring and secondary decoloring treatment on the dehydrated olive pomace oil to obtain double decolored olive pomace oil; and 6, deodorizing the double decolored olive pomace oil to obtain finished olive pomace oil. The method for ultrasonic-assisted extraction of olive pomace oil has the advantages of simple process, safety, environmental protection, high efficiency, fastness, good oil quality and high oil yield, and is suitable for small-lot production of the olive pomace oil.

The invention discloses a refining method of Idesia polycarpa edible oil, relating to the technical field of refining of Idesia polycarpa oil. The refining method comprises the steps of: 1) preparation of Idesia polycarparaw oil; 2) degumming treatment; 3) depickling treatment; 4) decoloring treatment; 5) debitterizing treatment; 6) deodorizing treatment; and 7) filtration to obtain the finished Idesia polycarpa oil. The refining method of the Idesia polycarpa edible oil has the advantages of safety, environment protection, high oil yield and impurity free, and improves the quality of the Idesia polycarpa oil.

The invention discloses a production method of spherical basic cobalt carbonate with a controllable particle size, and the production method comprises the following general steps of: (1) preparing ofa solution; (2) magnetic inducing nucleation; (3) grain growth; (4) filter pressing and washing; and (5) drying. According to the method, nucleation supersaturation is reduced by applying of an external magnetic field during the synthesis of the basic cobalt carbonate, the induction nucleation period is shortened, and a large amount of basic cobalt carbonate crystal nuclei are instantly formed inthe solution; meanwhile, the quality of the product can be well adjusted by controlling the stirring speed, the reaction temperature and the adding speed of a cobalt liquid, so that the effects of uniform particles and spherical morphology are achieved, and the cobalt content can reach more than 52%. The basic cobalt carbonate product has standard normal distribution of particle size, uniform particle size and good fluidity, and the maximum D50 exceeds 40mu m, the uniformity and stability of the particle size of large-scale continuous produced spherical basic cobalt carbonate can be realized,and the production method simple process, easy operation and low cost, and provides a high-quality raw material for the production of high-end lithium batteries.

The invention provides a mineral separation method for separating calcium and magnesium in medium-low-grade phosphorite, a urea ammonium nitrate calcium-magnesium fertilizer and an ammonium magnesiumsulfate nitrate fertilizer, and relates to the technical field of mineral separation. The mineral separation method comprises the following steps: sequentially carrying out crushing, calcining, digesting, leaching decalcification and leaching magnesium removing on medium-low-grade phosphorite, wherein the decalcified filtrate obtained by leaching decalcification separation is subjected to concentration and synthesis to prepare a urea ammonium nitrate calcium-magnesium fertilizer, and/or the magnesium-removed filtrate obtained by leaching magnesium removing separation is subjected to concentration and granulation to obtain an ammonium magnesium sulfate nitrate fertilizer. The low-magnesium phosphate concentrate produced through the mineral separation method can meet the requirement for producing a nitrophosphate fertilizer with a low nitrogen-phosphorus ratio while a full-water-soluble urea calcium magnesium ammonium nitrate fertilizer and/or a magnesium ammonium sulfate fertilizer are/is produced as a byproduct, so that phosphorus, calcium and magnesium elements in medium-low-grade phosphorite are recycled.

The invention discloses a method for filtering and separating red mud in a sintering process, and relates to a method for separating and washing red mud dissolved out from alumina production by the sintering process. A rubber belt filter is adopted to filter the red mud dissolved out in the sintering process; and the method is characterized in that: in the filtering and separating process, after the dissolved-out red mud enters the rubber belt filter, the red mud is subjected to solid-liquid separation first, and filter liquor which is crude solution is subjected to silicon removal; and the red mud separated from the crude solution continuously moves ahead on the filter along with belt filter cloth, and cleaning solution is injected to the red mud after the separation for washing separation. The method can effectively realize quick separation of the red mud dissolved out in the sintering process, reduce secondary reaction loss in a process of dissolving out and separating clinker, and improve the dissolution rate of alumina. Meanwhile, the water quantity for washing the red mud is reduced, the limitation to the sedimentation capacity of the red mud is eliminated, and the concentration of the crude solution after the red mud is separated can be greatly improved, so the production efficiency of the alumina by the sintering process is improved.

The present invention discloses a method for producing low chlorine high purity magnesia by taking hydrated magnesium chloride or a magnesium chloride solution and soda ash as raw materials. The method includes utilizing two filter devices (belt vacuum filter machine) having best washing effect as a washing device, at the same time performing slurrying washing twice, and using a filter device (a centrifugal machine) with best dehydrating effect for dehydration treatment. When the water content is reduced to less than 65%, basic magnesium carbonate is obtained, and then dried and calcined to get the high purity magnesia product with Cl less than 0.07% (by mass percentage). The method enables the magnesia product to reach the class of national superior products, and helps to reduce the amount of washing water and the energy consumption for drying.

The invention relates to a method for quickly determining ash content in a sulfenamide vulcanization accelerator, the method comprises the following steps: using a conductivity meter to determine the conductivity of deionized water to obtain conductivity C1 of the deionized water at 25 DEG C, taking a sulfenamide accelerator sample, adding the sample into the deionized water, mixing evenly, then standing for 2min-10min to prepare a sample solution, and then using the conductivity meter to determine the conductivity of the sample solution to obtain conductivity C2 of the sample solution at 25 DEG C; and according to a formula W=K2(C2-K1*C1)*% to calculate the ash content in the sulfenamide vulcanization accelerator; the method for quickly determining the ash content in the sulfenamide vulcanization accelerator is simple and practicable and is convenient to operate, and the detection time is short; and through use of the method, the ash content determination of a single sample takes about 10 min, the ash content determination of batch sample takes about 5 min-8 min, compared with a method specified in national standard GB/T11409, the detection time is substantially shortened, the ash content being qualified or not can be quickly calculated only with the need of detection of the conductivity, a detection process is rigorous with a small error, and detection results are accurate and intuitive.

The invention discloses a filtering and washing device which is composed of a hollow reactor, first filtering pipes, a stirring device, a material inlet, water inlets, a tail gas exhaust pipe, a filtering pipe opening, a material outlet, a liquid exhaust pipe and a liquid collecting pipe, wherein the first filtering pipes and the stirring device are arranged in the reactor; the material inlet, the water inlets, the tail gas exhaust pipe, the filtering pipe opening, the material outlet, the liquid exhaust pipe and the liquid collecting pipe are arranged outside the reactor; the filtering pipe opening is formed in the outer wall of the reactor; one ends of the first filtering pipes respectively extend into the reactor; the parts of the first filtering pipes, which extend into the reactor, are hollow pipes with through holes formed in the pipe walls; filtering cloth or filtering bags are tightly wrapped on the outer peripheries of the hollow pipes with the through holes formed in the pipe walls; the other ends of the first filtering pies are respectively fixed on the filtering pipe opening through flanges and are connected with the external liquid exhaust pipe. The filtering and washing device provided by the invention has a favorable filtering and washing effect, and is few in water washing quantity, and filtering cakes are loose, and pipeline delivery is convenient; enclosed operation is realized, and the production environment is improved; the impurity content is low; the product quality is good.

The invention relates to a centrifugal filtering method of paste juice in a cane sugar factory. The centrifugal filtering method comprises the following steps: (1) transporting paste juice obtained ina settling pond in a settling manner to a number-I centrifugal machine, separating the paste juice, transporting obtained filtered juice into a filtered juice box, and discharging obtained paste slaginto a paste slag and water stirring tank; (2) adding water into the mud slag and water stirring tank, and stirring; (3) transporting a material in the mud slag and water stirring tank to a number-IIcentrifugal machine, separating solids and liquid, transporting obtained filtered juice into a filter juice box, mixing the obtained filtered juice with the filtered juice in step (1), then transporting to a concentrating tank, and transporting obtained filtered paste to be used for producing organic fertilizer or feed, wherein the water content of the obtained filtered paste is less than 55 percent, and a sugar degree of the filtered paste is less than 4.5 percent. By adopting the method, the solids and the liquid of the paste juice in the cane sugar factory can be rapidly separated, the treatment time of the materials is shortened, the production efficiency is increased, the cane sugar loss of the filtered paste is reduced, the washing water amount is reduced, the energy is saved, the further comprehensive utilization of the filtered paste can be promoted, and the problems that the water content of the filtered paste is high, the filtered paste is difficult to transport and the clean production of the environment is influenced can be solved.

The invention discloses a preparation method for high-activity trimanganese tetraoxide. The preparation method comprises the following steps: S1, mixing electrolytic manganese metal powder with a catalyst, carrying out wetting to form slurry, adding the slurry into warm deionized water to form a suspension, continuously introducing oxygen or pure air, and carrying out a stirring reaction; S2, starting an ultrasonic generator for treatment, adding a activator, and carrying out a reaction for 1.8-5 h to obtain the suspension slurry of high-activity trimanganese tetraoxide, wherein ultrasonic intensity is adjusted within the range of 20 kHz-40 kHz during the reaction; and S3, performing concentration, washing, dehydrating and drying to obtain the high-activity trimanganese tetraoxide. The method of the invention has the advantages of short production cycle, low cost, small environmental pollution and good safety, and can prepare high-activity trimanganese tetraoxide.