44results about How to "Save process water" patented technology

The invention discloses a method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in an evaporation manner and a device of the method. The method particularly includes steps that agglomeration liquor prepared by desulfuration wastewater, high polymer adhesive and wetting agent is sprayed into an inlet flue of an electric precipitator and is evaporated by the aid of heat of flue gas, in an evaporation process, the wetting agent promotes dust to enter drops of the agglomeration liquor, the high polymer adhesive is connected with PM2.5 via a polymer chain with polar groups, the grain diameter of the PM2.5 is prompted to be enlarged, so that the PM2.5 can be gathered by the follow-up electric precipitator, the desulfuration wastewater is evaporated completely, suspended matters and dissolvable pollutants in the wastewater are converted into solid to be dissolved out, and the suspended matters and the dissolvable pollutants in the wastewater, together with dust in the flue gas, are gathered by the electric precipitator. The device consists of a boiler, an air preheater, the electric precipitator, a desulfurizing tower, a hydraulic cyclone, a desulfuration wastewater clarification tank and an agglomeration liquor preparation tank, and a double-fluid atomizing nozzle is arranged in the flue between the air preheater and the electric precipitator.

The invention discloses an integrated flue gas treatment device and method. The device comprises flue gas treatment equipment, ozone supply equipment, hydrogen peroxide supply equipment, evaporation and concentration equipment, cyclic sedimentation equipment and the like, wherein the flue gas treatment equipment comprises an ozone spray oxidation reaction layer, a hydrogen peroxide spray oxidation reaction layer, an absorber spray area, a slurry circulation area and a dust and mist removal area; both the ozone spray oxidation reaction layer and the hydrogen peroxide spray oxidation reaction layer are arranged in the absorber spray area; the dust and mist removal area is positioned above the absorber spray area; both the evaporation and concentration equipment and the cyclic sedimentation equipment are arranged in the flue gas treatment equipment. The device and the method disclosed by the invention are suitable for comprehensive treatment of flue gas containing SO2, NOX, Hg and dust and resource utilization of liquid waste in coal fired boilers, iron and steel sintering machines, pellets, industry kiln stoves and the like.

The invention discloses a desizing, enzyme-washing and bleaching integrated one-bath process which includes the steps of (1), adding water and denim garments in an industrial washing machine and starting steam-heating; (2), stopping the steam-heating; (3), adding in desizing and enzyme-washing two-in-one enzyme powder for processing; (4), adding in blenching enzymes for processing; (5), discharging working fluid in the industrial washing machine; (6), adding in water to wash denim garments in the industrial washing machine; (7), discharging bath foam in the industrial washing machine, and (8) dewatering and drying the denim garments to obtain the desized, enzyme-washed and bleached denim garments. By the desizing, enzyme-washing and bleaching integrated one-bath process, denim garments are processed with excellent and unique washing effect, while energy saving and environmental protection are achieved during processing. The desizing, enzyme-washing and bleaching integrated one-bath process is a good choice for washing of denim garments.

The invention discloses a production process of glutamic acid and monosodium glutamate, which comprises the following steps: firstly, evaporating and concentrating fermentation liquid; after concentrated sulfuric acid is added for isoelectric operation, cooling to 5-15 DEG C; obtaining an alpha-crystalline glutamic acid crystal suspension after primary separation, primary crystal washing, secondary separation and secondary crystal washing; regulating the pH value to be 4.0-5.0 at 80-90 DEG C, cooling to 35 DEG C, and obtaining a beta-crystalline glutamic acid crystal through filtration and separation, wherein the beta-crystalline glutamic acid crystal can be dried by air flow to obtain glutamic acid products, and the beta-crystalline glutamic acid crystal can be continuously neutralized and refined to obtain monosodium glutamate products; carrying out cyclone precipitation on primary mother liquid after primary separation, removing protein in supernatant liquid by flocculation air flotation process, and drying the protein to obtain bacterial protein powder; and carrying out ion exchange on the deproteinized clear liquid to prepare compound fertilizer. The extraction method of the glutamic acid provided by the invention fundamentally reduces the generation of waste water, improves the extraction yield and the product quality, reduces the amount of water for exchanging ions and washing columns to the minimum, and has higher production efficiency and lower production cost.

The invention discloses a method for realizing zero discharge of whole factory wastewater. The method comprises the following steps: collecting the whole factory wastewater by a wastewater collecting device (1), guiding the collected wastewater into a wet flue gas desulfurization device (2), performing heat exchanging and contacting with a high-temperature dry flue gas coming into the wet flue gas desulfurization device (2), humidifying the flue gas by evaporating part of the water in the wastewater and discharging from the top part of the wet flue gas desulfurization device (2); and discharging the concentrated wastewater along with the desulfurization wastewater from the wet flue gas desulfurization device (2). The invention additionally discloses a system adopting the method for realizing zero discharge of the whole factory wastewater, wherein the system comprises the wastewater collecting device (1), the wet flue gas desulfurization device (2) and the desulfurization wastewater zero discharge device (3) which are in turn connected. The method and the system have the following beneficial effects that a large volume of the wastewater is evaporated and decreased through the high-temperature flue gas in the wet flue gas desulfurization device, so that the heat utilization of the waste high-temperature flue gas is realized and the wastewater volume processed by the zero discharge device is reduced, and then the land occupation, the investment and the running cost of the desulfurization wastewater zero discharge device are all reduced.

The invention relates to a method for synthesizing betaine, which is characterized in that the method uses trimethylamine and chloroacetic magnesium at the molar ratio of 1.02-1.03:1 for amination and synthesis; the reaction temperature of synthesis is controlled between 40 and 60 DEGC; the optimum reaction temperature is controlled between 53 and 55 DEG C; a pH value is controlled to be between 8 and 9; synthesis time is between 2.5 and 5 hours; continuous feeding and continuous discharging are adopted; and the feeding and discharging of reaction are regulated and controlled by use of a pH meter. The method has the advantages of eliminating frequent operation for feeding, synthesis and discharging during batch production, as well as unsafe factors possibly caused by the frequent operation, increasing production yield, treating and recycling water after the concentration of betaine solution and reducing the waste of freshwater resources.

The invention relates to tubers, in particular to a tapioca starch residue separation system, which comprises a raw material cleaning machine, disintegrators, a residue-starch tank, vertical sieves, sieve cleaners, filter presses and the like. Raw materials are cleaned and crushed by a primary disintegrator and a secondary disintegrator to flow into the residue-starch tank, disintegrated residue slurry is sent by a lifting pump from the residue-starch tank to a higher primary vertical sieve, the residue slurry is separated by the primary vertical sieve, dense starch solution passes through a primary sieve cleaner to enter a raw starch tank, the separated tapioca residue is subjected to filter pressing by a primary filter press, dense starch solution and screen washing water after filter pressing pass through the primary sieve cleaner to enter the raw starch tank, fine residue passing through the primary sieve cleaner automatically flows back to the residue-starch tank, the tapioca residue after primary filter pressing enters a stirring tank to be mixed with clear water, and secondary vertical sieving, filter pressing and sieve cleaning are operated as the primary process. Reclaimed water is recyclable, the tapioca residue after secondary filter pressing is dried or directly sold, and the problems that the existing potato starch-residue separation process is complex, large in occupied space and high in operating cost are solved.

The invention relates to a method for preparing a benzoin product in a mother liquor recycling manner, and belongs to the technical field of preparation processes of chemical products. The method comprises the following steps: sequentially and proportionally adding reaction mother liquor, benzaldehyde, water, hydrocyanic acid, a cationic surface active agent, a phase transfer catalyst, a dispersing agent and an inorganic salt which are obtained in a reaction process in the preparation of the benzoin product into a reaction kettle; stirring and heating to 45 DEG C to 65 DEG C; adding the cationic surface active agent and reacting for 1.0 to 2.0 hours in a heat preservation manner; adding the cationic surface active agent, heating to 55 DEG C to 70 DEG C and reacting for 1.5 to 2.5 hours in the heat preservation manner until the finishing of the reaction; separating a crude benzoin solid product, washing with an ethanol solution and drying so as to obtain a white crystalline product, wherein separated filtrate is the reaction mother liquor; and collecting and weighing the reaction mother liquor so as to serve as a reaction solvent for recycling. The method has the characteristics of being simple in production process, high in benzoin product yield, good in benzoin product quality, low in production cost and convenient for industrial production.

The invention provides a process for preparing fatty acid through low pressure continuous hydrolytic decomposition, wherein the water-oil weight ratio is 5-30:100, the pump output pressure is controlled between the range of 0.02-0.5MPa, preferably between 0.1-0.4MPa, the raw materials are subjected to heat transfer through heat exchanger and are charged into heating-furnace to be heated to 250-500 deg. C and enter reactor, reacting for 2-30 minutes and the reaction product is led out, the fatty acid is obtained by straight distillation of separated crude fatty acid or fuel gas.

The invention discloses a process for dispersing fly ash fibers by using foam and a method for preparing an ultra-light fly ash fiber thermal insulation material by using the process. Cement clinker, a foaming agent and a small amount of water are stirred for air entraining to form foam, and fly ash fibers are dispersed by volume formed by the foam to form a light structure. Compared with the traditional fiber pulping, papermaking and filter pressing forming process, the process has the advantage that the water consumption and drying energy consumption are obviously reduced. The fly ash fiber thermal insulation material prepared by the process has good apparent density consistency. The material is waterproof and fireproof, and can work in an environment below 650 DEG C for a long time. The apparent density of the material is between 0.08 g/cm < 3 > and 0.15 g/cm < 3 >, the heat conductivity coefficient of the material is between 0.035 W/(m.K) and 0.043 W/(m.K), and the material has good mechanical strength under dry and wet conditions. And more than 50 times of circulating freezing and thawing can be borne.

The invention discloses a system for zero discharge of waste water in the whole plant, comprising a waste water collection device (1) for collecting waste water in the whole plant, a flue gas wet desulfurization device (2) and a desulfurization waste water zero discharge device (3). The discharge pipe of the device (1) is connected to the flue gas wet desulfurization device (2) through a pipeline, and the liquid discharge pipe of the flue gas wet desulfurization device (2) used to discharge the desulfurization wastewater is connected to the desulfurization wastewater zero through the pipeline. discharge device (3). The beneficial effects of the present invention are: using the high-temperature flue gas in the flue gas wet desulfurization device to evaporate and reduce the original large amount of wastewater, so as to realize the heat utilization of the waste high-temperature flue gas and reduce the amount of wastewater treated by the zero-emission device, As a result, the land occupation, investment and operating costs of the desulfurization wastewater zero discharge device are all low.

The invention relates to a sintering and pelletizing flue gas ultralow emission device and method. The technology of an MGGH heat collector, a limestone-gypsum method desulfurization tower, a wet type electrostatic dust collector, a flue gas condensation deacidification device, an MGGH heater, a GGH, a direct combustion type combustor and SCR denitration is adopted. The tray and the flow guide ring are arranged in the desulfurization tower, so that flue gas is uniformly distributed, the desulfurization efficiency is improved, and sulfur dioxide and dust are greatly removed; a set of flue gas deacidification demister system is arranged at an outlet section of the wet-type electric precipitator, the temperature of flue gas is reduced by more than 4 DEG C, sulfuric acid mist in the flue gas is condensed and separated out, a large amount of sulfuric acid mist and other salt substances are removed, and system equipment blockage caused by substances such as acid mist and the like of subsequent equipment is prevented; according to the denitration system disclosed by the invention, the built-in combustors are uniformly arranged in the flue, the heating is uniform, the coal gas consumption is reduced, and the static mixer is arranged at the inlet of the denitration reactor, so that the uniformity of an ammonia-flue gas flow field is ensured, and the denitration efficiency is improved.

The invention discloses a process for producing sodium carbonate, aluminum oxide and blended cement from red mud. The process comprises the following steps: diluting red mud to obtain diluted red mud,feeding the diluted red mud into an a-stage washing unit, feeding the diluted red mud into a carbonization unit A for reaction, feeding the reacted diluted red mud into a b-stage washing unit for washing, feeding the diluted red mud into a filtering unit, filtering to obtain low-sodium red mud, and mixing and grinding the low-sodium red mud and lime to obtain blended cement; in the process, collecting washing water that is used for washing red mud in the b-stage washing unit, feeding the washing water into the a-stage washing unit for a-stage washing; collecting the washing water that is usedfor washing the red mud in the a-stage washing unit; delivering one part of the washing water to an m-stage evaporation and concentration unit, then sending the washing water to a carbonization unitB, introducing the washing water to a filtering and washing unit, separating out aluminum hydroxide and liquid sodium carbonate in the filtering and washing unit, drying and burning aluminum hydroxideto obtain aluminum oxide, and making liquid sodium carbonate pass through n evaporation and concentration units and an evaporation and drying unit to obtain sodium carbonate.