32results about How to "Reduce process water consumption" patented technology

The invention discloses a production method of folacin without sewage discharge and a technological process thereof comprises crude product production, acid dissolution process, alkali dissolution process and refining process. The sewage discharge is reduced to zero, meeting the requirements of national environment protection and saving water and cost. The production method of the invention leadsthe yield of crude products to be increased from the original 80 percent to present 85 percent, thus improving product yield so as to decrease waste and improve the rate of production.

The invention discloses a preparation method of high-purity 2,4-D. The preparation method comprises the following steps: (1) preparing 2,4-bitionolate; (2) enabling chloroacetic acid and the 2,4-bitionolate to directly react under the alkaline condition to obtain 2,4-D sodium salt; (3) achieving pressure filtration and acidification of the 2,4-D sodium salt to form a 2,4-D crude product; (4) rinsing- pressure-filtering and drying the 2,4-D crude product to obtained to the high-purity 2,4-D product. The preparation method provided by the invention can effectively reduce the process water consumption, simplify the process steps, greatly shorten the reaction time and improve the product yield.

The invention provides an application method and a process for a biological extraction agent in oily sludge treatment. Lemon olefins are adopted for treating oily sludge at the bottoms of tanks for petroleum, petrochemical and coal chemical industries, impurity oily sludge of pipelines and soil polluted by the oily sludge; the application method and the process are used for treating the oily sludge of different types, extracting petroleum from oil sand, and the like. The application method and the process disclosed by the invention are also suitable for extracting crude oil in oil sand, have the characteristics of high recovery rate, low energy consumption and short soil second ploughing time, and have no secondary pollution to environment.

The invention relates to an enzyme preparation or a biological preparation applied in the processing industry of starch wheat and specifically to a starch wheat compound enzyme. The starch wheat compound enzyme is prepared by uniformly mixing the following raw materials expressed in mass percent: 10 to 15% of cellulose, 15 to 30% of xylanase, 5 to 15% of mannanase, 5 to 10% of pectase and 30 to 60% of wheat flour. The invention also relates to a method of applying the compound enzyme in preparation of starch wheat and vital gluten. The method comprises a Martine production process and is characterized in that during making of dough, a wheat compound enzyme is added into water used for making the dough, addition amount of the wheat compound enzyme is 0.01% to 0.03% of the amount of the wheat flour, then the wheat compound enzyme and the water are uniformly mixed under stirring and finally a prescribed amount of flour is added to make the dough. Compared with the traditional Martine production process, the method provided in the invention has the following advantages: separation of starch from vital gluten can be accelerated, water consumption in making the dough and in washing can be reduced, production yield of vital gluten can be increased by 4.2 to 5%, and water consumption in the method is reduced by about 20%.

The invention relates to a method for preparing ferrous sulfate, which uses low toxicity and nonflammable methylene chloride instead of highly toxic, flammable and explosive organic reagents such as chlorinated benzene as an extraction agent, and uses a decanter for extraction, which can effectively Improve the efficiency of extraction and separation, reduce the amount of extractant, remove the organic impurities in the acid through extraction, reduce the impurity content in the acid, so that the obtained sulfuric acid solution can be directly used to prepare ferrous sulfate, and the prepared ferrous sulfate product The quality has reached GB10631‑89 industrial superior product.

The invention provides a method for producing fatty acid by continuous hydrolysis at low pressure. The weight ratio of water to oil is 5-30:100. After exchanging heat, enter the heating furnace to heat to 250-500°C and then enter the reactor. After reacting in the reactor for 2-30 minutes, the reaction product is drawn out, and the crude fatty acid and fuel gas are obtained after separation or directly distilled to obtain fatty acid. The present invention reduces the operating pressure by changing the temperature conditions of hydrolysis, thereby reducing the pressure level of the whole system equipment, shortening the process route, reducing process water consumption, reducing the water system load and sewage discharge intensity; removing the glycerin recovery system, reducing energy consumption and production costs ; Shorten the reaction time and greatly increase the production capacity of the device.

The invention relates to a spade heat-treatment medium recovery device. The device comprises a conveying chain, a sprinkler device, a salt bath groove, a bleaching chamber, an immersing and diluting tank, a fresh water spray chamber and a three-level cooling pool. The salt bath groove is a heat-treatment iso-quenching bath provided with nitrate; the bleaching chamber for washing and diluting work pieces, the immersing and diluting tank and the fresh water spray chamber are arranged in a triangular shape, wherein the bottom of the bleaching chamber and the upper part of the immersing and diluting tank are provided with osculums of tail water in turn, and a washing recovery pipeline is communicated with an one-level recovering pool; three recovery pools constitute the three-level cooling pool which is arranged under the ground. The recovery steps are as follows: hoisting the work pieces on the conveying chain and entering the work pieces to the salt bath groove provided with the nitrate to carry out heat-treatment iso-quenching; then carrying out three-level washing and leading the fresh water tail water to enter the one-level recovery pool to be naturally cooled; and at last, recovering the medium in the three-level recovery pool. The device can use the residual heat of a heating furnace, and has the advantages of convenient operation, saved energy, simple recovery process, closed circulated process and no pollution.