43results about How to "Save on sewage charges" patented technology

The present invention discloses an attapulgite clay textile sizing slurry and its production process. Its composition includes (by wt%) 40.0-56.0% of purified attapulgite clay, 23.0-26.0% of water-soluble polyacrylic acid, 18.0-23.0% of carbonyl diamide, 3.0-6.0% of sodium carboxymethyl cellulose, 0-1.5% of hydrolyzed polyacrylonitrile, 0-1.5% of emulsible oil, 0-2.0% of sodium carbonate and 0-0.0003% of polyethylene glycol oxide. Its production process includes the following steps: (1), ore dressing, pulverizing and purification; (2), mixing all the raw materials according to mixing ratio, kneading and pelleting; and (3), shearing, rolling so as to obtain the finished product material.

The invention relates to a method for treating atrazine-containing pesticide wastewater, which is characterized by comprising: pumping pesticide wastewater into a neutralization pool; adding inorganic acid to regulate pH between 7 and 8; allowing the obtained product to enter a coagulation-sedimentation pool; putting in coagulant for coagulation; allowing the obtained product to enter a sand filter; performing filtration; allowing the obtained product to enter a reduced-pressure evaporation system of a water-collecting pool; discharging condensate which is repeatedly evaporated and concentrated and then is subjected to activated carbon adsorption into a recycled-water storage pool; allowing reactor-bottom residual liquid of evaporated and concentrated under reduced pressure to enter a salting-out tank and cooling the reactor-bottom residual liquid to form salt; and periodically transporting salt slag to a solid waste treatment plant for final treatment. The method has the advantages of realizing the zero wastewater discharge of pesticide production processes, performing safe disposal on solid pollutants, ensuring environmental safety, effectively solving the problem that the wastewater produced during pesticide production is difficult to treat, saving a large amount of cost for pollution discharge, reducing environmental pollution and having high economic and environmental benefit.

The invention provides a comprehensive reutilization system of heating boiler wastewater. The system comprises a wastewater collection tank; a precipitate filtering unit receiving the wastewater from the wastewater collection tank and carrying out precipitate filtering treatment of the wastewater, wherein the precipitate filtering unit comprises a precipitating pool positioned at the bottom of the precipitate filtering unit, an automatic alkali addition device positioned on the precipitate pool, a mixing pool positioned above the automatic alkali addition device and used for mixing alkali added wastewater with a medicine, and a water purifying pool positioned above the mixing pool; an automatic medicine device which is connected with the mixing pool and inputs the medicine to the mixing pool; and a concentrating pool for pumping clean water from a clean water pool. The comprehensive reutilization system has the advantages of wastewater recycle efficiency improvement and cost saving.

The invention relates to an electroplating reclaimed water recycling and treating system, comprising a control device, a preposed adjusting system, an ultrafiltering treating system and a reverse osmosis treating system, wherein the preposed adjusting system, the ultrafiltering treating system and the reverse osmosis treating system are mutually communicated, the preposed adjusting system comprises an ORP (Oxidation-Reduction Potential) adjusting system and a PH adjusting device; the ORP adjusting system comprises an ORP adjusting tank, a reducing agent metering pump, a reducing agent tank and a stirrer; the ulatrafiltering system comprises a water pump, a quartz sand filter, a precise filter and an ultrafiltering membrane assembly; and the reverse osmosis system comprises a water pump, an active carbon filter, a scale inhibitor adding device, a safety filter, a first section of high-pressure pump, a second section of high-pressure pump, a reverse osmosis membrane assembly and a water purified tank. By adopting a device combining membrane separation and the filter to treat the electroplating reclaimed water, the invention has the advantages of favorable treatment effect, low operation cost, convenient operation and capability of long-term continuous operation; and in addition, the invention meets the requirements of environmental protection and cleaning electroplating, not only reduces the pollution and saves the production cost, but also can fully utilize water resources and protect the environment.

The invention discloses a phosphorus-free, fluorine-free and heavy metal-free phosphorus displacing agent and a preparation method thereof. The phosphorus displacing agent is prepared from the following raw materials in percentage by weight: 1-28% of salt, 1- 15% of acid, 1-15% of alkali, 0.1-5% of additive, 0.1-9% of screening agent and the balance of tap water. The preparation method comprises the following steps of: a, preparing the materials; b, preparing the screening agent; c, preparing the additive; d, adding the balance of tap water into a plastic reaction kettle, heating and cooling the mixed solution, adding the acid and adding the alkali to regulate a pH value to 4 to 6; e, adding the additive; and f, adding the screening agent, and filtering the mixture to obtain a filtrate product. By the phosphorus-free, fluorine-free and heavy metal-free phosphorus displacing agent and the preparation method thereof, the phosphorus-free, fluorine-free and heavy metal-free raw materials are adopted, waste water produced in production and using processes does not contain pollutants such as phosphorus, fluorine, heavy metals and the like, is not required to be purified and can be directly discharged, and hazardous solid wastes are avoided, so pollution to the environment and damages to human bodies are avoided, pollution discharge cost is greatly saved and the protection of an ecological environment is facilitated; and when the phosphorus displacing agent is used, a film formed on the surface of the product is uniform, compact, continuous, highly adhesive and highly anticorrosive, and the phosphorus displacing agent can completely replace a bonderite.

The invention discloses a method for reducing the generation of waste water in the clean production of papermaking. Part of the dilute white water produced in the process enters the paper stock dilution process for repeated use with concentrated white water, and part of it enters a white water filter for filtering treatment, and the remaining dilute white water is After adding softener, it is input into paper pulp for use; after dilute white water is processed by white water filter, the ultra-clear water produced enters the ultrafiltration process; the concentrated liquid produced by the ultra-filtration process is used for starch gelatinization in the surface sizing process, and the produced clear water enters directly Reverse osmosis process: The ultrapure water produced by the reverse osmosis process is used in the press section process, and at the same time, a trace amount of inorganic salt concentrate is generated as waste water for treatment. The method for reducing waste water in papermaking clean production of the present invention, by realizing water softening and purification in papermaking production process, eliminates Ca 2+ , Mg 2+ , The system accumulation of DCS realizes the clean production of papermaking and the micro treatment and discharge of papermaking wastewater.