58results about How to "Reduce production water consumption" patented technology

The invention belongs to an industrial utilization method of aeolian sand in desert, in particular to a method for preparing feldspar powder concentrate by mineral separation of aeolian sand in desert. The method comprises an early-stage ferrum-removal process, a middle-stage feldspar flotation separation process and a later-stage ferrum-removal process. The early-stage ferrum-removal process comprises the following specific steps: firstly, carrying out dry magnetic separation on the aeolian sand in the desert; carrying out reselection and separation on the concentrate obtained after dry magnetic separation; carrying out powerful scrubbing and sizing-desliming on the concentrate obtained after reselection and separation; and carrying out wet magnetic separation to obtain the ferrum-removal concentrate for the middle-stage feldspar flotation separation process, and carrying out the later-stage ferrum-removal process on the feldspar mineral aggregate obtained in the middle-stage feldspar flotation separation process to finally obtain the feldspar powder concentrate. The processes of the invention have the advantages of water conservation, reduced energy consumption and low cost, and can fully utilize the existing aeolian sand resources to produce the high-quality feldspar powder concentrate.

The invention discloses a method for processing acorn starch, which comprises the following steps: crushing acorn kernel into one fourth to one eighth size of the original kernel; removing tannin in the acorn kernel by adopting an ultrasound assisted three-stage countercurrent leaching process, wherein the process conditions of each stage in the ultrasound assisted three-stage countercurrent leaching is that: the ratio of material to water is 1:5-1:6; the temperature is 40 to 45 DEG C; the time is 50 to 60 min; the ultrasonic power is 262 to 454 W, and the frequency is 25.6 to 47.6 kHz; bleaching with water which is two times of the acorn kernel, and pulping, dehydrating and bleaching to remove impurities; finally, drying wet acorn starch for 60 to 80 minutes under the conditions that the vacuum degree is 0.08 to 0.09 MPa and the temperature is 50 to 60 DEG C by adopting vacuum drying technology and device to, and crushing and screening to obtain pure acorn starch products with the water content of lower than 12 percent and the tannin content of only 0.175 percent. The method for processing the acorn starch has the advantages of low water consumption in production, low wastewater emission and short production cycle, wherein the time used in each cycle is about four hours.

The invention relates to an advanced treatment method of yeast waste water, the advanced treatment method of yeast waste water is characterized in that the following steps are included: the inorganic flocculant is added in yeast waste water biochemical water after biochemical treatment, and quickly stirred in a stirring rotation rate ranging from 300 to 600 revolutions per minute; wherein, the inorganic flocculant is aluminium salt or iron salt, and the adding amount of the inorganic flocculant complies with that: 11to 15mM Fe3+ or Al3+ is added into a gram COD of yeast waste water; and then the organic flocculant is added and stirred; the organic flocculant is cation type polyacrylamide, 2 to 10 milligrams of organic flocculant is added in each liter of yeast waste water biochemical water; after stirring, the mixture enters into the settling pond for separating the solid from the liquid as well as settling the flocculation; the supernatant solution is directly discharged or further removed the COD and the chrominance by active carbon absorption. The invention has advantages of high removal rate of COD and chrominance.

The invention provides a method for treating rubber vulcanization accelerator wastewater by combination of MVR (mechanical vapor recompression) evaporation and chemical treatment. The method comprises the steps of putting wastewater into a first effect evaporator of the MVR, heating steam until the evaporating temperature of a vapor phase is 80 to 100 DEG C, evaporating supplied material wastewater and enabling the salt concentration of same to reach 15 percent to 25 percent; adding the wastewater with 15 percent to 25 percent of salt concentration by evaporating into a stirring tank with a stirring function for performing acid adjustment and adjusting the pH to 1 to 5, performing filter pressing and recycling resin after mixing and sedimenting for 30 to 60 min; adding alkali into the wastewater after filter pressing and adjusting the pH to 6 to 8, then entering into a second effect evaporator of the MVR for concentration, and separating salt by a centrifugal machine; the combination of the most energy-efficient MVR evaporation technology and chemical treatment is adopted, industrial salt which can be exported can be obtained, COD (Chemical Oxygen Demand) of the wastewater is greatly reduced, the effluent standard can be met after post processing; the COD of condensation water by MVR evaporation is very low and the condensation water can be reused for production, the water consumption of production is lowered, and the production cost is saved.

The invention discloses a method for recycling water in laver processing. The method includes a process of recycling the water produced by a laver processing machine, and a process of adopting the recycled water as the raw material to produce beverage. The process of cycling the water produced by the laver processing machine comprises the following steps: draining the water into a flow splitting tank by a draining pipe of the laver processing machine; automatically adjusting a switch valve to be switched on by virtue of the flow in a water outlet when the water in the flow splitting tank is accumulated to be higher than the water outlet; pumping the water to a material inlet of the laver processing machine by a water pump; automatically adjusting the switch valve to be switched off once the water circulating volume reaches a set volume; draining the water from another water outlet; filtering the water, and transferring the water into an ultrahigh-temperature instant sterilizer to sterilize; and then storing the water into a storage tank and sealing after the sterilizing. The process of adopting the recycled water as the raw material to produce beverage comprises the following steps: taking the sterilized circulating water as the raw material; and mixing the sterilized circulating water with auxiliary materials; filtering by a beverage filter; transferring water into the ultrahigh-temperature instant sterilizer to sterilize; and then filling by a filling machine after sterilizing. The laver residues obtained by filtering can be used as feeds or vegetable fertilizers.

The invention relates to the technical field of methionine, and particularly discloses a production technology of L-methionine. According to the production technology of L-methionine, L-methionine adopts DL-methionine as a raw material and is prepared through biological enzyme resolution; and stereospecificity of amino-acylase is L type, amino-acylase can perform resolution on chemosynthetic N-acetylDL-amino acid, and L-methionine is prepared through a series of biochemical treatment according to the characteristic of amino-acylase. According to the invention, a non-aqueous solution acylation technology is adopted, acylation yield is increased to 126%-128%, the enzymatic resolution period is shortened to 35 hours, a fluxing agent is recycled, sewage discharge is reduced, and the total yield of L-methionine production reaches 82%.

The invention relates to the technical field of metallurgy, in particular to an oxygen-free cooling and residual heat recovering method for a magnetizing-roasted iron ore product. The method comprises the following steps: feeding a magnetizing-roasted high-temperature material being 800-850 DEG C and 8-25 millimeters in granularity from the upper part of a vertical cooler; introducing blast furnace gas of which the CO or H2 volume content is not greater than 30 percent from the lower part of the vertical cooler, and controlling the flow rate of the high blast coal gas at 0.8-1.5 m/s; performing heat exchange between the high-temperature material and the blast coal gas in the vertical cooler during inverse flow, wherein the temperature of the high-temperature material is lowered below 200 DEG C, and the temperature of the blast coal gas is raised to 700-750 DEG C. The magnetizing-roasted high-temperature material undergoes secondary oxidation in a cooling process, and can undergo secondary micro-reduction in the cooling process in the cooler, so that the quality of the magnetizing-roasted iron ore product is improved. Meanwhile, the over-reduction of the material is prevented, and cyclic utilization of residual heat is realized.

The invention relates to a method for producing a biological organic fertilizer from wheat straw. The method comprises the following steps: crushing the wheat straw to be less than 50mm; spraying a bacterial liquid onto the crushed wheat straw, uniformly mixing, controlling the water content to be within 70-85% and the pH value to be 7; turning over when the temperature of the material is risen to be 50 DEG C, and controlling the fermentation temperature to be 50-70 DEG C and the fermentation time to be 5-15 days; when the compost size of the fertilizer is collapsed by 1/3-1/2 at the final fermentation point, drying the fertilizer in air, so as to obtain the biological organic fertilizer. As the bacterial liquid is used in biological organic fertilizer fermentation production, the composting time is shortened, the water amount for production is reduced, no toxicity, harm or odor is generated, the environment is not polluted, the nutrients can be maintained, the content of organic matters in the fertilizer is increased, and the quality of the fertilizer is improved.

The invention discloses a nitro-cotton cotton pulp dewatering method, relates to the technical field of nitro-cotton production, and provides a nitro-cotton cotton pulp dewatering method in which the nitro-cotton loss amount is little during dewatering. The nitro-cotton cotton pulp dewatering method comprises the following steps that 1, heavy impurities and iron chips in cotton pulp are removed; 2, the cotton pulp concentration is adjusted by adopting a concentrator to enable the concentration of cotton materials in the cotton pulp to be increased to 8%-15%; 3, the cotton pulp is conveyed to a horizontal sedimentation centrifuge; 4, the horizontal sedimentation centrifuge is started to perform solid-liquid separation on the nitro-cotton cotton pulp, and the working parameters of the horizontal sedimentation centrifuge are as followed: the rotating speed of a main engine ranges from 2000 r/min to 2500 r/min, the differential speed is 20 r/min, and the internal circle diameter of a water fender is 179 mm. According to the nitro-cotton cotton pulp dewatering method, it can be guaranteed that the wastewater solid content of a nitro-cotton product with the very small particle size is smaller than or equal to 2%o after dewatering is performed, and compared with an existing dewatering technology, the wastewater solid content is significantly decreased, and the product yield is increased.

The invention provides a process for enzymatic preparation of gelatin. The process comprises steps of crushing bone grains, conducting acid pickling, extracting gel, filtering the gel, concentrating the gel and sterilizing the gel, wherein the step of acid pickling is implemented by the following operations: mixing a bone grain raw material with water according to a weight ratio of 1 to (1-5), controlling a pH value at 1-2.5, conducting soaking for 6-10h, removing a liquid phase by virtue of centrifugal separation, and collecting solid materials settled on a rotary drum wall. The process provided by the invention, compared with a conventional gelatin process by virtue of an alkaline method, can shorten a production cycle, greatly improve efficiency and improve the quality stability of the gelatin.

The invention belongs to the technical field of alga chemical production and relates to a comprehensive treatment method for recycling waste calcium water and waste acid obtained through algin production. The comprehensive treatment method comprises 1, removing suspended solids in waste calcium water, 2, adding a calcium removal agent into the waste calcium water to remove calcium and carrying out settlement, 3, removing impurities in the supernatant, directly utilizing the supernatant as return water, adding calcium carbonate into the waste acid for a reaction so that a calcium chloride solution is obtained and adding hydrochloric acid into the calcium chloride solution so that a calcium chloride mass concentration is at least 12%, and 4, filtering the calcium chloride solution and directly utilizing the filtered calcium chloride solution in an algin solution calcification process in algin production. The comprehensive treatment method solves the problem that the existing waste water treatment process has high settlement difficulty and a high cost and produces a large amount of calcium salt wastes. The comprehensive treatment method realizes comprehensive recycle of algin processing waste water.

The invention relates to a rotating disc type micro-grid assembly for a backwash-free dynamic membrane. The rotating disc type micro-grid assembly comprises a circular-disc shaped filter tank, wherein the interior of the filter tank is a micro-grid cavity; the rotating disc type micro-grid assembly is characterized in that a micro-grid base material is an outer micro-grid; the filter tank is an outer filter tank; a central water outlet pipe perpendicular to a disc surface of the outer filter tank is arranged on a circle center part of the outer filter tank; a water outlet rotating disc which is matched with the central water outlet pipe in a sliding mode is sleeved on the central water outlet pipe; clamping discs which are fixedly connected with the central water outlet pipe and are fixed on two sides of the outer micro-grid are respectively sleeved on two sides of the water outlet rotating disc; a circular-disc shaped inner filter tank which is connected with the water outlet rotating disc is arranged in the outer filter tank coaxially; teeth are circumferentially arranged outside the inner filter tank; a disturbance water catchment channel is arranged in the outer filter tank; a transmission gear engaged with the teeth are arranged in the outer filter tank; a rotational vibration attenuation brush plate of which a plurality of brush hairs are in contact with the back side of the outer micro-grid is arranged on the inner micro-grid surface which covers the disc surface of a water receiving disc; and a disturbance water drainage nozzle is arranged on the bottom of the outer filter tank. The rotating disc type micro-grid assembly has the advantages of stability in yielding water quality, high flux, high water production rate and simplified facilities.

Traditional yellow wine production relates to extremely complicated technical processes such as rice soaking, rice steaming, cylinder filling, yeast adding, fermentation, filtering, boiling and ageing, during which large amounts of labor is required for transporting materials from one container to another, the rice soaking process can produce a large amount of rice milk, resulting in a COD (chemical oxygen demand) up to 53000 mg/L, accordingly waste of crops and environmental pollution are caused. Therefore, the invention relates to an energy-saving and water-saving yellow wine production device integrating rice soaking, rice steaming and fermentation. The energy-saving and water-saving yellow wine production device is characterized in that 1) rice soaking is performed in a cycling spraying manner, which, compared with traditional flooding type rice soaking manners, can save water by more than 1/2, and meanwhile, rice milk can be completely utilized to achieve zero discharge; 2) rice soaking period is shortened to 1-2 hours, so that losses of raw material rice during rice soaking can be significantly reduced; 3) rice soaking, rice steaming and fermentation are performed in situ through one device, so that material conveying strength can be significantly reduced, energy sources, labor, facilities and rice soaking and washing water can be saved, and meanwhile production lands can also be saved.

The invention discloses a high-efficiency and energy-saving manganese washing process without arranging a tailing pond and polluting the environment. The mined manganese slime is broken by a manganese slime breaking machine and then is washed by a manganese slime manganese-washing machine to obtain manganese ore, the water for washing the manganese slime enters a tailing slime water collecting tank and separated through a tailing treatment machine, the clean water is reused and the slime is back filled. The invention has the advantages that: firstly, the manganese washing is locally carried out after mining the manganese ore, therefore, the link of manganese ore slime transport is reduced and the production and transportation cost is reduced; secondly, water resources are saved and the pollution to the environment is also avoided due to the recycling of the manganese washing water; thirdly, no tailing pond is required, not only the land occupation is little, but also the original potential safety hazard of production of the tailing pond is overcome and the construction investment is reduced; and fourthly, the manganese slime breaking machine is additionally arranged, therefore, the problem that the large manganese slime cannot enter the machine before or the damage to the manganese washing machine is great is solved, and the ore washing efficiency is greatly improved by 35 percent than the original process efficiency.

The invention discloses a plastic master batch, a conical double screw extruding machine, and an injection moulding production processing process line. The gas-barrier degradable plastic master batchis composed of, by weight, 50 to 55 parts of polyhydroxyalkanoate PHA, 15 to 20 parts of polylactic acid PLA, 2 to 3 parts of feather powder, 0.2 to 0.5 part of epoxy soybean oil, 0.2 to 0.5 part of dioctyl adipate, 0.5 to 0.8 part of glycidyl methacrylate (GMA), 0.5 to 0.8 part of alpha-alkyl cyanoacrylate, 1.0 to 1.3 parts of zinc oxide, and 1.0 to 1.5 parts of graphene. The injection moulding production processing process line using the gas-barrier degradable plastic master batch comprises an injection moulding machine Z; the back part of the injection moulding machine Z is provided with injection moulding moulds including an injection moulding mould A; a plastic product is produced using the injection moulding moulds, and then is placed on a product conveyor belt D using a product clamp C; and the product clamp C is arranged on a three dimensional rotating mechanical arm.

The invention discloses a method for preparing carboxyl-type amphoteric starch in one step by a semi-dry process, which is characterized in that: firstly adding a cationic reagent 3-chloro-2-hydroxypropyl-trimethylammonium chloride to carry out etherification reaction on the original starch, After the etherification reaction, directly add the anionizing reagent monochloroacetic acid to carry out the carboxymethylation reaction. Both anionization and cationization reactions are carried out in one kettle to prepare carboxy-type amphoteric starch in one step, and the production process is uninterrupted. The invention can effectively solve the shortcomings of wet process and dry process. Cationic and anionic groups are connected in the same starch chain, so that the product has the characteristics of cationic starch and anionic starch, and various performances are improved; the reaction time can be shortened from 8 hours to 6 hours; due to the shortened process, energy saving and consumption reduction, so that The product cost can be saved by about 12%.