35results about How to "Improve filter strength" patented technology

The invention relates to a method for preparing ammonium sulfate by continuous conversion of phosphogyspum with a polycrystalline method, belonging to the technical fields of resource comprehensive utilization and chemical industry, and relates to a method for producing ammonium sulfate by conversion of phosphogyspum with a polycrystalline method based on a byproduct phosphogyspum in a (sulfuric acid) wet phosphoric acid industry as a main raw material. The production process comprises the following steps: (1) pretreating the raw material of phosphogyspum discharged in the wet phosphoric acid industry so as to obtain purified phosphogyspum; (2) absorbing ammonia and carbon dioxide with a ammonia-sulfate-containing primary lotion which is produced by washing a calcium carbonate filter cake with water in a filtration process in a carbonation tower so as to produce an ammonia sulfate and carbonate solution; (3) connecting a calcium carbonate polycrystalline nucleus generator with a multiple-tank or multiple-partition groove type reactor with a stirrer in series to constitute a conversion crystallizer; (4) filtering a reaction material slurry discharged from the conversion crystallizer so as to obtain a filter cake and filtrate containing 38-40% by weight of ammonium sulfate; (5) carrying out secondary countercurrent washing on the filter cake obtained in the step (4) with clear water, and feeding the ammonia-sulfate-containing primary lotion to the carbonation tower for absorbing gas ammonia and carbon dioxide so as to produce an ammonia sulfate and carbonate liquid; and (6) neutralizing and decarburizing the filtrate containing ammonium sulfate from the step (4) with sulfuric acid, then centrifugally separating so as to obtain a crystal containing wet ammonium sulfate, separating out a mother liquid, carrying out cycle concentration on the mother liquid, and drying the crystal containing wet ammonium sulfate so as to obtain a finished product ammonium sulfate.

The invention discloses a method for improving the performance of dihydrate wet methods phosphoric acid reaction stuff, which comprises the following steps: Classify treating the stuffs by a classifier, the ardealite crystal size of classification bottom current is: the proportion of particles of +40 um size is 90%-95%, 100 um size is 50%-65%, +150 um size is 20%-35%. Filtering and washing the classification bottom current in a filter. The ardealite crystal size of classification overflow is: the proportion of particles of -40 um size is 80%-85%, -100 um size is 100%. Growing and increasing further have the classification overflow in a seed crystal reaction tank and entering the next classified cycle. Taking the ardealite filtrated and washed to the slag ground, and taking the diluted phosphoric acid to the storage tank, returning the preliminary filter liquid and 1st cleaning solution to the reaction tank, and quadratic countercurrent washing the 2nd cleaning solution in the filter.

The invention relates to a sanding room dust removal cabinet. The sanding room dust removal cabinet comprises a cabinet body and a control device, wherein the cabinet body is provided with a top wall, a side wall and a base, the top wall is provided with a fan, a water accumulation tank is arranged above the base, the cabinet body is provided with a dust removal chamber, the dust removal chamber is formed by the base, partial side wall and a separation device which is arranged in the cabinet body, a filter device is arranged in the dust removal chamber, the side wall of the dust removal chamber is provided with a dust absorption port, the filter device consists of a primary filter device and a secondary filter device, the primary filter device is a water-curtain filter device, the secondary filter device is a water mist filter device, a water supply system for supplying a water source to the filter device is arranged in the dust removal chamber, and a precipitate discharging device is arranged in the water accumulation tank. By adopting the sanding room dust removal cabinet, the dust can be thoroughly filtered, the filter intensity is high, and the dust removal efficiency is also high.

The invention relates to a water purifier, and particularly relates to a faucet water purifier. The faucet water purifier comprises a base and a shell, wherein the periphery of the lower end of the shell is connected with the base via threads; a filter core of which the upper end is propped against the top of the shell is arranged in the shell; a water outlet tip of the lower end of the filter core extends into a water outlet pipe in the base and is in water-sealing connection with the base; an up-turning intake pipe communicated with an internal hollow cavity of the shell is also arranged at one side end of the base; fluid flowing into the intake pipe is filtered by the filter core and then flows out from the water outlet pipe; the water outlet pipe is communicated with an arc faucet through a corner-shaped joint; and a high magnetic block and weight increasing blocks which are arranged on two sides of the high magnetic block are also embedded into the lower part, at two sides of the intake pipe and the water outlet pipe, of the base. The faucet water purifier is compact in structure, and high in purifying efficiency.

The present invention proposes a method and equipment for extracting phosphate rock with 93%-98% concentrated sulfuric acid to produce phosphoric acid. Sulfuric acid and phosphate rock pulp are respectively added to two series-connected cylindrical reaction tanks of equal volume according to a certain ratio. The reaction tank is equipped with several sulfuric acid distributors and surface coolers, as well as a single central stirring paddle with large circulation. The cold air passes over the surface of the slurry thrown by the surface cooler and the sulfuric acid distributor, and the cold air is heated and humidified, thereby taking away the water vapor and removing the heat of reaction. The extraction reaction is carried out in two reaction tanks at the same time, and the operating conditions of the two tanks can be controlled separately, which is more conducive to the decomposition of phosphate rock and the coarse crystallization; the sulfuric acid is easy to disperse and more uniform under the sprinkler of the sulfuric acid distributor, and will not produce local A lot of SO 4 2- excess. The invention has strong adaptability to phosphate rock and can effectively improve the P 2 o 5 Improve the extraction rate, improve the crystallization of calcium sulfate dihydrate, and improve the filtration strength.

The invention relates to a method for producing concentrated superphosphate and coproducing calcium chloride through medium and low grade phosphorite, which comprises: firstly, using hydrochloric acid to perform acidolysis on powdered rock phosphate 1 which is medium and low grade powdered rock phosphate with the particle diameter of less than or equal to 1,165 mu m; secondly, performing partial extraction, namely performing countercurrent extraction on an acidolysis solution obtained in the first step, wherein P2O5 entering an organic phase accounts for 50 to 90 percent of the total mass of P2O5; thirdly, performing washing and back-extraction on the organic phase in the second step, and concentrating a back extract acid to prepare concentrated phosphoric acid; fourthly, performing neutralization reaction on a residual aqueous phase in the second step and lime cream, performing solid-liquid separation after the reaction is over, washing filter cakes to obtain calcium hydrophosphate, and performing evaporation, concentration and drying on filtrate to obtain the calcium chloride; and fifthly, using the concentrated phosphoric acid obtained in the third step to perform acidolysis onpowdered rock phosphate 2 which is medium and low grade powdered rock phosphate with the particle diameter of less than or equal to 74 mu m, adding the calcium hydrophosphate prepared in the fourth step for reaction after the acidolysis reaction is over, and drying reaction products to obtain the concentrated superphosphate after the reaction is over.

An automatic rainwater collection and reuse processing device provided by the present invention includes a drainage pipe, a connecting unit and a filtering unit. A filter unit is provided; the present invention can solve the problem that "generally, when rainwater is collected, the rainwater is mostly flowed into the water collection chamber through the drain pipe, and because the drain pipe and the water collection chamber cannot be fixed, it is easy to cause rainwater to splash out, and The rainwater needs to be manually transferred to the storage tank, and the rainwater in the water collection chamber cannot be completely discharged, so that the rainwater is easy to cause corrosion on the inner wall of the water collection chamber; after the current rainwater is collected, most of it is not filtered. Putting it into use, because rainwater contains a lot of microelements is not suitable for crops, and rainwater is easily mixed with impurities during the collection process, so it is easy to cause damage to crops” and other issues.