88results about How to "Reduce enrichment costs" patented technology

The invention relates to a process for removing impurities from a lepidolite leaching solution. The process is completed by carrying out impurity removal on alumina twice and adjusting pH values for twice. Lithium salt precipitation products are obtained by adding additives to a lithium sulfate solution after impurity removal, and corresponding refined lithium salts can be prepared as required. The process has the advantages that the cost of impurity removal is low, by-products with high added values can be obtained, the extraction rate of lithium is high, various useful components of lepidolite ores can also be fully utilized when lithium salts are produced, and the recycling of resources is realized.

The invention discloses a high-desalting-rate seawater desalination method based on liquefied natural gas cold energy, which comprises the following steps: sufficiently carrying out indirect heat exchange on liquefied natural gas and a gas-state secondary coolant, and sufficiently carrying out indirect heat exchange on the obtained liquid-state secondary coolant and seawater to obtain ice and concentrated seawater; (2) taking the ice obtained in the step (1), standing under atmospheric pressure until the melting rate of ice is 10-50%, recovering the liquid, and taking the residual ice for later use; (3) crushing the residual ice obtained in the step (2) to obtain ice crystal granules, centrifuging, recovering the liquid, and taking the ice crystal granules for later use; and (4) completely melting the ice crystal granules obtained in the step (3). The invention also discloses a seawater desalination plant based on liquefied natural gas cold energy. The method utilizes the cold energy released in the liquefied natural gas gasification process, comprehensively utilizes the freeze desalting, gravity desalting and centrifuging desalting techniques, has the advantages of simple steps, energy saving and environment friendliness, and enhances the seawater desalting rate on the basis of freeze desalting.

The invention relates to a method for recovering waste heat during processing of a starchy material, which belongs to the technical field of starchy material saccharification. The method for recovering the waste heat during the processing of the starchy material comprises the following steps: boiling and steaming a liquefied starchy emulsion, discharging after the laminar flow and heat preservation, vacuumizing and cooling the discharging to obtain the cooled starchy emulsion, and then recovering the waste heat and condensate water of the secondary steam obtained by vacuumizing through a heat-exchange device. The invention also provides a device special for the method. The method for recovering the waste heat during the processing of starchy material has the advantages of comprehensively recycling the waste heat in the saccharification process of the starchy material, reducing the demands for the condensate water, meeting the requirement of energy saving and emission reduction of the state, and having remarkable economic and social benefits.

The invention relates to the field of preparation of high-quality organic fertilizer by recycling waste, and concentrates biogas slurry to obtain organic fertilizer and reusable water by utilizing the principle of reverse osmosis. The invention particularly relates to a production scheme and a preparation method of converting biogas slurry into organic fertilizer. The production scheme and the preparation method of converting biogas slurry into organic fertilizer are characterized by comprising the following steps: (A) sand filtration treatment: pumping the biogas slurry into a steel tank filled with quartz sand, and filtering out the large dross; (B) reverse osmosis treatment: pressurizing the biogas slurry, and separating water from the biogas slurry by using the principle of reverse osmosis, thereby obtaining the biogas slurry concentrate; (C) ozone sterilization: sterilizing the water obtained through the reverse osmosis with ozone, and recycling the water; (D) addition of effective ingredients: recycling the concentrated biogas slurry, carrying out the chemical examination, and adding corresponding ingredients according to different operating requirements; and (E) fermentation with beneficial bacteria: fermenting the prepared concentrate with beneficial bacteria and packaging.

The invention discloses a reverse osmosis strong brine concentration method and equipment. The concentration method comprises the following processes of (1) a positive osmosis concentration process: using reverse osmosis strong brine as raw material liquid, so that the water in the raw material liquid passes through a positive osmosis film to enter the liquid suction side through the effect of suction liquid, salt in the raw material liquid is intercepted at the raw material liquid side, and the raw material liquid can be concentrated; (2) a film distillation concentration process: conveying the raw material liquid concentrated in the step (1) to a hot side of a film distillation film; performing cooling by circulation water at the cold side of the film distillation film or vacuum suction,so that the water at the hot side passes through the film distillation film in a water vapor form to enter the cold side, the raw material liquid at the hot side loses water, and the raw material liquid is further concentrated. The concentration equipment comprises a positive osmosis device, a film distillation device and a strong brine tank. According to the concentration method and equipment, the positive osmosis is used as the film distillation pretreatment technology to perform deep concentration on the reverse osmosis strong brine, so that the whole energy consumption is reduced; the treatment of the reverse osmosis strong brine and the subsequent resource utilization are realized at low energy consumption and high concentration efficiency.

The invention relates to a traditional Chinese medicine extract and preparation thereof, in particular to a pu-erh tea extract and preparation thereof. The preparation method comprises the following technical means: encapsulation, countercurrent extraction, membrane filtration, centrifugation and the like.

The invention discloses a milk concentrating method and system based on forward osmosis technology. The method comprises the following steps: an original extract liquid permeates and extracts water molecules in raw milk through a forward osmotic process, and concentrated milk and a diluted extract liquid are obtained. The system comprises a raw milk tank, a concentrated forward osmotic membrane unit, a concentrated milk collection tank, a diluted extract liquid regeneration and reuse unit and an original extract liquid tank which are connected. By adopting of the concentrating forward osmoticmembrane unit, the effective ingredients in the milk can be concentrated, the water content of the milk can be reduced, the high-concentration milk can be prepared, and the product quality can be improved; the milk is concentrated by the forward osmotic technology, the solid content of about 60% (30%-70%) can be obtained, and the solid content is higher than that of other low-temperature concentrating technologies.

The invention discloses a method for utilizing critic acid fermentation wastewater and belongs to the technical field of environmental engineering. Based on the characteristic that critic acid fermentation wastewater contains a large amount of degradation-resistant mycelia, high concentration BOD, total nitrogen, and total phosphor, nitrogen and phosphor are removed by a precipitation method, highconcentration BOD is taken as an auxiliary carbon source for a biological nitrogen-removing and phosphor-removing treatment of chemical wastewater, the wastes are converted into valuable resources, and the critic acid fermentation wastewater is utilized. The wastewater discharge of critic acid producing enterprises is reduced, the byproduct benefits are increased, and great economic benefits andsocial benefits are generated.

A low-temperature vacuum thickener relates to the technical field of liquid low-temperature concentration. The invention mainly comprises a heating pot, an evaporating pot, and a condensing pot; the heating pot, the evaporating pot, and the condensing pot of the invention respectively have negative-pressure sealing performance and are connected by pipelines; a steam system is connected to a hot steam inlet of the heating pot; a water-charging pump in series connection with a cooling pipe in the condensing pot is opened; a vacuum pump connected to a vacuum-pumping outlet of the condensing pot is opened; and the system can be used normally. The invention has a simple and reasonable structure, and can concentrate various liquid with different concentrations. The invention can meet the concentration requirements of liquid, maintain original fragrance and colors of the raw material, increase the quality of the concentrate, and reduce concentration cost.

The invention relates to a Chinese medicine extract concentrated film device comprising a material inlet pipe, wherein one end of the material inlet pipe is provided with a material inlet, and the other end is connected with a booster pump; the booster pump is connected with a tubular membrane set through a pipeline; the tubular membrane set comprises an outer pipe and a tubular film core arrangedin the outer pipe; the tubular film core is connected with one end of a return pipeline; and the outer pipe is connected with a discharge pipeline. The device can be widely used in the Chinese medicine extract after being simply processed by a 10-micrometer filter and carry out the concentration below 70 DEG C. The device has the advantages of low cost, high concentration capability and efficiency, easy washing and high temperature resistance.

The invention discloses an extraction method of stevioside. The extraction method comprises the following steps: crushing dry stevia leaves, adding into an extraction tank, then adding water of whichthe mass is several times of that of the stevia, and stirring; adding cellulase, laccase and pectinase into the extraction tank, and extracting while stirring; adding a flocculant into the extractiontank, flocculating, and filtering to obtain a filtrate; adsorbing the filtrate by using macroporous adsorption resin, desorbing by using ethanol, concentrating a desorbed solution, and then performingdesalting desorption by using cationic resin to obtain a secondarily desorbed solution; concentrating the secondarily desorbed solution, and performing spray drying to obtain stevioside powder. Through addition of a mixed enzyme of the cellulase, the laccase and the pectinase into a stevia crushing solution, the addition amount of the water and the number of extractions in the extracting step arereduced, and the extracting yield is 13-32% higher than that when no enzyme is added, and the concentration cost and the operation complexity of a subsequent process are reduced.

The invention discloses a method for preparing a concentrated liquid fertilizer by using wastewater containing livestock excrement. The method comprises the following steps: adding acids to immobilize amino and keep fertilizers; adding quicklime to neutralize excessive acids; performing primary fermentation so as to increase the dissolution degree of organic fertilizers; performing solid-liquid separation; performing negative-pressure concentration; and performing secondary fermentation on a concentrated liquid, thereby obtaining a livestock excrement concentrated liquid fertilizer. The method is simple in concentration process, good in operability and low in concentration cost; the solution degree of fertilizer components in the organic liquid fertilizer is high; due to amino immobilization and fertilizer increase of acids, and alcohol for increasing the dissolution degree of livestock excrement in the wastewater, the organic fertilizers can be relatively thoroughly dissolved in the wastewater, the cost of negative pressure concentration is reduced, the alcohol and the water can be both recycled, and the utilization rate of the livestock excrement is effectively increased; and by adopting the method, wastewater containing livestock excrement generated in the on-scale livestock breeding process can be turned into a high-concentration organic fertilizer, so that wastewater treatment in the on-scale livestock breeding process is solved, and harmonious development of agriculture, on-scale livestock breeding and living environments of people is promoted.

The invention relates to the production of titanium white powder production, and particularly relates to a method for preparing titanium white powder from high-concentration additional crystal seeds. Compared with the existing spontaneous crystal seed method, high-concentration additional crystal seed hydrolysis can be increased by 1.5%, normal water washing can be performed for primary washing and secondary washing, and the pulping Fe content can be also well controlled; and meanwhile, the high-concentration additional crystal seed hydrolysis material has a certain effect of improving pigment performance.

The invention discloses an enrichment device, an enrichment system, a sample manufacturing system and a sample detection system. The enrichment device comprises an enrichment housing, wherein the enrichment housing defines an enrichment cavity for accommodating suction liquid; a suction connecting part which is used for communicating the suction mechanism with the enrichment cavity, so that the enrichment cavity forms negative pressure under the action of a vacuumizing mechanism; and a separation part which is arranged on the enrichment housing, and when negative pressure is formed in the enrichment cavity, a sample can pass through the separation part and form the suction liquid to enter the enrichment cavity, and retentate is retained on the separation part.

The invention relates to a self-born crystal seed for hydrolysis in titanium dioxide production and a preparing method thereof, and belongs to the technical field of chemical engineering. The method includes adding a titanium solution into base water and fully mixing the mixture to obtain self-born crystal seeds. The amount of the base water is calculated to control the total titanium concentration, calculated based on TiO2, of a hydrolysis system to be 155-175 g/L according to the concentration of the initial titanium solution. The base water is prepared by adding sulfuric acid or sodium hydroxide into water and fully mixing the mixture. The dosage of the sulfuric acid or sodium hydroxide meets a condition that when the titanium solution is added into the base water and the amount of theadded titanium solution is 3.0-3.5% of the volume of the total titanium solution, the concentration of sulfuric acid of the whole reaction system is 0.6 +/- 0.02 mol/L. A present process for producingtitanium dioxide self-born crystal seeds through a sulfuric acid method is utilized, the base water amount for initial formation of the self-born crystal seeds and the acidity of a critical point arecontrolled to obtain hydrolysis seeds of a proper amount and proper mass, and pigment titanium dioxide with good structures and excellent performance can be prepared.

The invention relates to the technical field of wet method phosphorus acid concentration and especially provides a concentration method and a concentration apparatus for wet method phosphorus acid. In the apparatus, a concentrated acid precipitation unit is connected to a secondary acid pump; the secondary acid pump is connected to a concentration mechanism; and the concentration mechanism is connected to a finish product acid precipitation unit. With limitation on concentration, specific gravity and solid content of the wet method phosphorus acid fed from a material inlet, and limitation on flow rate and processing time during the treatment process, the method has better wet method phosphorus acid concentration effect than a conventional method. When processing load is 750000 ton, solid content is reduced by 55675.85 ton, and meanwhile, 59140.87 ton of clear acid is avoided from being brought away by solid, so that the yield of concentrated clear acid is increased by about 8%. The method and the apparatus reduce the loss rate of the clear acid and reduce cost.