32results about How to "Reduce pollution factor" patented technology

The invention discloses a deaminizing treatment method of medium-concentration and low-concentration ammonia-nitrogen wastewater under high COD (Chemical Oxygen Demand), salt content and heavy metal content. The method comprises the following steps: regulating pH of ammonia-nitrogen wastewater to be about 10 through alkali liquor to convert ammonium ions (NH<4+>) in the wastewater into volatile NH3; removing metal ions by flocculent precipitation and filtering; preprocessing wastewater through a cartridge filter; feeding the wastewater into a hydrophobic membrane, wherein the wastewater is fed through the inside bottom part of the membrane, and an acid absorption solution is fed through the outside bottom part of the membrane; enabling NH3 to penetrate the hydrophobic membrane by dissolving and diffusing in order to be absorbed by the acid solution outside the membrane, and thus reaching the purpose of removing ammonia nitrogen. According to the deaminizing treatment method, the water treated is of complex quantity; ammonia nitrogen in wastewater can be efficiently removed under high COD, high salt content and high heavy metal content conditions; and the method is simple, small in equipment investment, low in operation cost, and has a good treatment effect.

The invention provides an environment-friendly anti-scaling nano-ceramic membrane coating and a preparation method of the environment-friendly anti-scaling nano-ceramic membrane coating, belonging to the field of functional coating. The formula of the environment-friendly anti-scaling nano-ceramic membrane coating contains the ingredients as follows: 15-65% of aluminum sol, 15-65% of silica sol, 4-20% of silane monomers, 3-27% of pigments, 3-27% of fillers and 5-25% of anti-settling agent. The preparation method includes the step as follows: respectively weighing aluminum sol, silane monomers, pigments, fillers and anti-settling agent in corresponding weight, and then conducting mixing, high-speed dispersion and grinding, wherein the ground mixture serves as component a; weighting silica sol in corresponding weight, wherein the silica sol serves as component b; and mixing the component a with the component b, and sanding and curing the mixture, thus obtaining the -ceramic membrane coating. On the basis of inorganic membrane forming materials, the hydrophobic characteristic of the coating is regulated by changing the types and the ratio of the silane monomers, so that the environment-friendly anti-scaling nano-ceramic membrane coating achieves good bonding property with a transport device and also can effectively prevent scaling or biological rooting; and simultaneously the nano-ceramic membrane coating has the quality of a enamel surface, excellent decoration, safety and innocuity, thus being an environment-friendly coating.

The invention provides a new method for bleaching straw weaving, which belongs to the technical field of straw weaving bleaching and dyeing, and comprises the following steps: S1, activation pretreatment: adding straw weaving to a reactor, then adding an aqueous solution of surfactant I, and adjusting the pH of the solution to 4.5- 5.5, soaking activation pretreatment after heating up; S2, soaking and cleaning with water; S3, bleaching treatment: soak the straw weaving in the bleach solution, adjust the pH of the solution to 10-12, and perform a bleaching treatment after heating up; adjust the pH of the solution to 9 with inorganic alkali ~10, carry out secondary bleaching treatment; wherein, the bleaching agent solution is prepared from a composite hydrogen peroxide stabilizer, surfactant II, water and hydrogen peroxide; S4, add water to soak and wash several times until the hydrogen peroxide is detected to be qualified, take out The straw is dried to obtain the bleached straw. The method reduces the sewage treatment cost, is convenient to operate and easy to control, and is suitable for industrial production.

The invention provides a method for preparing a naphthalene series water reducing agent. The method comprises the following steps of naphthalene fusion, sulphonation reaction, steam hydrolysis naphthalene removal, recovery and reuse of naphthalene, condensation reaction and neutral reaction. Compared with the conventional production technology, the process of the invention has the advantages that: the consumption of sulfuric acid is reduced by adjusting a material charging ratio of sulfuric acid to material naphthalene at the step of sulphonation reaction; the step of the recovery and reuse of naphthalene is added, so that the raw materials are fully utilized; and in the following step of neutral reaction, only a small amount of alkali solution is added and the addition of calcium hydroxide is unnecessary, so that the filter step is eliminated, and deposition loss and entrainment loss of the products are avoided.