37results about How to "Achieve the purpose of concentration" patented technology

The invention discloses a high-salt wastewater evaporation concentration method and device, belonging to the technical field of high-salt wastewater treatment. The method comprises a process of heating high-salt wastewater for evaporation and concentration. The method is characterized by comprising the following steps: carrying out oriented scale formation before heating the high-salt wastewater, heating the high-salt wastewater by using a surface-type heat exchanger, and evaporating the heated high-salt wastewater by using a mechanical draught cooling tower, wherein the heat medium water adopted in the surface-type heat exchanger is circulating cooling water flowing out of the steam condenser. The circulating cooling water of the condenser is utilized to perform heat exchange and heating on the high-salt wastewater, and the heated high-salt wastewater is sent into the mechanical draught cooling tower for evaporation, thereby lowering the heat loss of the circulating cooling water of the condenser, enhancing the cooling efficiency of the condenser, and lowering the high-salt wastewater treatment cost.

The invention discloses a preparation method of a flat membrane for sludge concentration, and belongs to the fields of sludge concentration flat membranes. The method comprises the following steps: sequentially adding a solvent, a pore-foaming agent, a surface active agent and polyvinylidene fluoride (PVDF) into a wild-mouth bottle according to certain ratio, and meanwhile performing stirring, soas to uniformly mix the materials, then putting the wild-mouth bottle into a 50 to 80 DEG drying oven, and timely stirring every day, so as to obtain a uniformly mixed casting solution, uniformly coating the casting solution onto a non-woven fabric base material through a flat film blade, soaking non-woven fabric into a coagulating bath, so as to perform phase transformation, soaking a flat membrane into glycerinum, then treating the flat membrane, and performing normal temperature drying treatment, so as to obtain a PVDF membrane used for sludge concentration treatment. The PVDF membrane hasthe characteristics of high flux, high strength and low pollution rate, can ensure that water yielding is stable when being applied to a flat membrane sludge concentration reactor, and properly meetsthe requirement on sludge concentration.

The invention relates to a bitter herbs polysaccharide extraction method. The method comprises the steps of dry crushing, ultrasonic extraction, reduced pressure concentration, ethanol precipitation, dialysis and vacuum drying. The extraction method has the advantages of simplicity, low cost and stable process. The bitter herbs polysaccharide extraction method improves the content of bitter herbs polysaccharide to 0.53% and the purity of the bitter herbs polysaccharide to 82% by optimizing the technological parameters, such as crushing particle size, ultrasonic extraction parameters and semi-permeable membrane permeation size.

The invention discloses a multi-level light alkali evaporating unit. The multi-level light alkali evaporating unit is characterized by comprising first to fourth level shell-and-tube heat exchangers and first to fourth level steam separators, wherein the first to fourth level shell-and-tube heat exchangers are sequentially connected through valves, the first to fourth level shell-and-tube heat exchangers are correspondingly connected with the first to fourth level steam separators in a one-to-one correspondence, a vaporized alkaline liquor in the shell-and-tube heat exchanger is conveyed to the corresponding steam separator to separate the steam and the liquid, the liquid separated by each level of the steam separator is conveyed back to the correspondingly connected shell-and-tube heat exchanger, the separated steam is conveyed to the next level of the shell-and-tube heat exchanger, and a concentrated alkali is output from the fourth level shell-and-tube heat exchanger. The multi-level light alkali evaporating unit increases the efficiencies of evaporation, concentration and recovery of the light alkali, greatly saves the energies, reduces the cost, is more efficient and energy-saving, and brings more benefits for an enterprise.

The invention discloses a hydropower coproduction system capable of performing gradient utilization of flue gas waste heat concentrated solutions and a working method of the hydropower coproduction system, and belongs to the field of energy resources and power. The hydropower coproduction system is characterized in that the heat quantity of flue gas (1) is absorbed by an inorganic salt dilute solution (2) in a heater (9), so that waste heat recovering is realized; the heated dilute solution enters a humidifying tower (10) to transfer heat and mass to low-temperature dry air (3); when the temperature of the air (3) is raised, the moisture content of the air (3) is increased, then the air (3) enters a heat exchanger (13) to transfer heat and mass to an organic working medium (4); the temperature of the air (3) is reduced, and the moisture is deposited; the low-temperature air (3) enters a gas-liquid separator (14); and the separated air enters the humidifying and packing tower (10) againthrough a fan (15) to start the next circulation. The hydropower coproduction system disclosed by the invention utilizes the differences of moisture loading capacity of the air in different temperatures, through the direct contact of air-dilute solution in the humidifying tower, heat and mass transferring is performed, and the concentration of the inorganic salt dilute solution is realized; the gradient utilization of energy is realized, the utilization rate is high, and the energy saving effect is good.

The invention discloses a novel tea juice concentration method. The method includes the following steps of S1, preparation of raw materials, wherein tea components are extracted with hot water, a tea juice stock solution with the solid content of 0.8%-3% is obtained through at least one-time pre-filtration with a 300-500-mesh filter screen or a filter bag, and the tea juice stock solution with the set volume is put into a raw material tank; S2, preparation of a drawing liquid, wherein a salt solution or saccharide solution with the osmotic pressure greater than 3.5 Mpa is prepared into the drawing liquid, and the drawing liquid with the set volume is put into a drawing liquid tank; S3, concentration, wherein a raw material circulating pump is started to convey the stock solution into a forward osmosis membrane module, a drawing liquid circulating pump is started to convey the drawing liquid into the forward osmosis membrane module at the same time, the temperature is controlled at 10-30 DEG C, the pressure is controlled at 0-2 bar, the circulating flow rate of the stock solution is 20-120 L / h, the circulating flow rate of the drawing liquid is 10-50 L / h, and concentrated tea juice with the soluble solid concentration of 30-60% is obtained 40-120 minutes after running. According to the method, the tea juice is concentrated by utilizing a forward osmosis membrane technology, there is no external pressure for driving in the forward osmosis membrane concentration process, the energy consumption is small, the contamination degree of a membrane surface is small, and flavor substances and nutrient substances in the tea juice can be retained.

The invention discloses a method of gradient in-series membrane concentration for a bone extract liquid. A device for the method is provided with: a micro-filtering concentration system, which includes a first circulating flow path having a ceramic membrane filter, wherein the first circulating flow path is used for performing micro-filtration circulating concentration through the first circulating flow path to obtain a micro-filtered concentrate; a primary reverse osmosis concentrating system, which includes a second circulating flow path having a primary reverse osmosis membrane filter, wherein the second circulating flow path is used for performing primary reverse osmosis circulating concentration to the filtrate to prepare a primary concentrate; and a secondary reverse osmosis concentrating system, which includes a third circulating flow path having a secondary reverse osmosis membrane filter, wherein the third circulating flow path is used for performing secondary reverse osmosis circulating concentration to the primary concentrate to obtain a secondary concentrate. The method concentrates the bone extract liquid with reduction on energy consumption, and greatly reduces loss of nutrients and flavor substances in the bone extract liquid.

The invention belongs to the technical field of graphene, and particularly relates to a preparation method of a graphene-based photocatalytic material. The preparation method comprises the following steps: adding graphene and a dispersing agent into deionized water, and adding hydrochloric acid and ammonia gas for performing a microwave reaction to obtain an ammonified graphene solution; adding zinc acetate into ethanol water, introducing ammonia gas for performing an aeration backflow reaction, and performing a reduced-pressure distillation reaction and a constant-pressure standing reaction to obtain a thick liquid; then, dropwise adding the thick liquid into the ammonified graphene solution, meanwhile, performing the microwave reaction to obtain a photocatalytic dilute solution, and performing a secondary reduced-pressure distillation on the photocatalytic dilute solution to obtain the graphene photocatalytic material. According to the preparation method, the graphene is introduced,so that the visible light absorbing performance of a catalyst is improved effectively; meanwhile, the separation between photoexcitation electrons and holes is facilitated, so that the quantum efficiency is increased.

The invention provides a flat plate falling film type freeze concentrator and a freeze concentration method thereof. The flat plate falling film type freeze concentrator comprises a shell, and the interior of the shell is divided by heat conducting separation plates into a falling film freezing chamber, a temperature control chamber and a concentrated liquid collecting chamber. The heat conducting separation plate between the temperature control chamber and the falling film freezing chamber is a falling film freezing plate, and the heat conducting separation plate between the concentrated liquid collecting chamber and the falling film freezing chamber is an ice water collecting plate. A solid-liquid separating net opening enabling the falling film freezing chamber and the concentrated liquid collecting chamber to be communicated is formed in the end, close to the falling film freezing plate, of the ice water collecting plate. A solution inlet pipe, a concentrated liquid recycling pipe, a solution pump and a storage tank are communicated for backflow. According to the flat plate falling film type freeze concentrator and the freeze concentration method thereof, a falling film mode is adopted for cooling capacity exchange, the flowing speed of a falling film solution is scientifically controlled, the pre-cooling temperature of the solution and the temperature of a secondary refrigerant are precisely controlled, and ice on a falling film frozen face grows in a single ice crystal mode as much as possible, so that the formed ice layer is little in entrained solute and effective ingredient loss.

The invention relates to an electrodialysis membrane recovery process for acid wastewater in viscose fiber spinning, and belongs to the technical field of electrodialysis membrane recovery. The process comprises steps of: pretreatment of low-concentration acid wastewater, pretreatment of an acid bath after spinning, arrangement of electrodialysis membrane components, entrance of electrodialysis membrane components to the acid bath after spinning, ion transfer, and acid bath reuse. Acid wastewater in viscose fiber spinning is treated through the specific electrodialysis membrane recovery process, sulfuric acid and zinc sulfate in the low-concentration of acid wastewater is effectively recovered, the acid bath after spinning achieves the requirements of the acid bath before spinning and is reused, and consumption of alkaline substances and discharge of salt substances are reduced.

The invention discloses a preparation method of a flat membrane for sludge concentration, and belongs to the fields of sludge concentration flat membranes. The method comprises the following steps: sequentially adding a solvent, a pore-foaming agent, a surface active agent and polyvinylidene fluoride (PVDF) into a wild-mouth bottle according to certain ratio, and meanwhile performing stirring, soas to uniformly mix the materials, then putting the wild-mouth bottle into a 50 to 80 DEG drying oven, and timely stirring every day, so as to obtain a uniformly mixed casting solution, uniformly coating the casting solution onto a non-woven fabric base material through a flat film blade, soaking non-woven fabric into a coagulating bath, so as to perform phase transformation, soaking a flat membrane into glycerinum, then treating the flat membrane, and performing normal temperature drying treatment, so as to obtain a PVDF membrane used for sludge concentration treatment. The PVDF membrane hasthe characteristics of high flux, high strength and low pollution rate, can ensure that water yielding is stable when being applied to a flat membrane sludge concentration reactor, and properly meetsthe requirement on sludge concentration.

The invention belongs to the technical field of graphene, and specifically relates to a preparation method of a graphene-based photocatalytic material. Graphene and a dispersant are added to deionized water, and hydrochloric acid and ammonia gas are added to carry out microwave reaction to obtain an ammoniated graphene solution; acetic acid Zinc is added to ethanol water, and ammonia gas is introduced to carry out aeration and reflux reaction, vacuum distillation reaction and constant pressure standing reaction to obtain a viscous liquid; Catalyze the dilute solution, and finally carry out the second vacuum distillation reaction on the photocatalyzed dilute solution to obtain the graphene photocatalytic material. In the present invention, the introduction of graphene effectively improves the absorption capacity of the catalyst for visible light and at the same time promotes the separation of photoexcited electrons and holes, thereby improving quantum efficiency.

The invention discloses ultrahigh cross-linked resin SX-01 and a preparation method thereof. The ultrahigh cross-linked resin SX-01 is prepared by sufficiently swelling chloromethylated polystyrene resin in nitroethylbenzene the weight of which is 3-8 times that of chloromethylated polystyrene resin; after swelling, adding an amination reagent the weight of which is 2-5 times that of chloromethylated beads, then adding ferric trichloride the weight of which is 10-30% that of the chloromethylated beads to be used as a Friedel catalyst, carrying out Friedel-Crafts and crosslinking reaction at the temperature of 100-150 DEG C, stopping reaction when the content of residual chlorine in the resin is 1-3%, cooling and filtering resin spheres after the reaction is finished, washing with ethanol and distilled water, and carrying out vacuum drying. The invention also discloses a new method for separating pyrimidine nucleotide by utilizing the resin. According to the new method, an adsorption column is adopted for adsorbing and separating uridylic acid, so that dosage of acid and base in an operation process can be reduced, and discharge of waste water can be reduced.

The invention discloses a method for concentrating bone extract with gradient serial membranes, comprising: providing a microfiltration concentration system, the microfiltration concentration system includes a first circulation flow path with a ceramic membrane filter; The extract is concentrated by microfiltration circulation to obtain a microfiltration concentrate; a first-stage reverse osmosis concentration system is provided, and the first-stage reverse osmosis concentration system includes a second circulation flow path with a first-stage reverse osmosis membrane filter; using the second circulation flow path Concentrate the filtrate with a reverse osmosis cycle to obtain a concentrated liquid; provide a secondary reverse osmosis concentration system, the secondary reverse osmosis concentration system includes a third circulation flow path with a secondary reverse osmosis membrane filter; use the third circulation The flow path performs secondary reverse osmosis cycle concentration on the primary concentrated liquid to obtain the secondary concentrated liquid. The invention achieves the purpose of concentrating the bone extract under the condition of reducing energy consumption, and greatly reduces the loss of nutrition and flavor substances of the bone extract.

The invention discloses a high-salt wastewater evaporation concentration method and device, belonging to the technical field of high-salt wastewater treatment. The method comprises a process of heating high-salt wastewater for evaporation and concentration. The method is characterized by comprising the following steps: carrying out oriented scale formation before heating the high-salt wastewater, heating the high-salt wastewater by using a surface-type heat exchanger, and evaporating the heated high-salt wastewater by using a mechanical draught cooling tower, wherein the heat medium water adopted in the surface-type heat exchanger is circulating cooling water flowing out of the steam condenser. The circulating cooling water of the condenser is utilized to perform heat exchange and heating on the high-salt wastewater, and the heated high-salt wastewater is sent into the mechanical draught cooling tower for evaporation, thereby lowering the heat loss of the circulating cooling water of the condenser, enhancing the cooling efficiency of the condenser, and lowering the high-salt wastewater treatment cost.

The invention provides a device for recovering high-concentration hydrochloric acid from chlorine-containing tail gas, which comprises a chlorine-containing tail gas supply system, a water supply system, a circulating absorption system, a secondary absorption system and a product storage and filling system, the circulating absorption system is respectively connected with the chlorine-containing tail gas supply system, the water supply system, the secondary absorption system and the product storage and filling system, and the secondary absorption system is also respectively connected with the water supply system and the product storage and filling system. The method is reasonable in design and simple to operate, the problem that a large amount of low-concentration waste hydrochloric acid is generated in the treatment process of chlorine-containing tail gas such as hydrogen chloride, boron trichloride and silicon tetrachloride is solved, and the concentration of waste acid is effectively increased to the industrial grade; the concentrated hydrochloric acid can be used for steel pickling and other processes, and can also be used for subsequent purification processes, so that the purity of the hydrochloric acid is further improved.

The application discloses a network node monitoring method. The method includes acquiring a set of network nodes to be monitored; dividing the set of network nodes into a first preset number of neighborhoods according to a first preset rule, wherein each of the neighborhoods includes a second preset number of networks A node; determining a node in each of the neighborhoods according to a second preset rule as a monitoring node, where the monitoring node is used to monitor other network nodes in the neighborhood where the monitoring node is located. The present application also provides a network node monitoring system implementing the above network node monitoring method. This application solves the technical problems of lack of pertinence in monitoring, huge amount of calculation and work, and high monitoring cost due to the adoption of a "1-to-1" monitoring method in the related art.