3 results about "Potassium bisulfite" patented technology

The utility model provides a sodium hydrosulfide solution decolorizing device, and belongs to the technical field of sodium hydrosulfide solution processing. Comprising a reaction kettle, a stirring shaft is rotatably connected in the reaction kettle, and two round pipes fixedly penetrate through a kettle cover of the reaction kettle. Through the arrangement of the annular box, the inner dispersion boxes and the outer dispersion boxes, a potassium hydrogen sulfite solution flows into the annular box after passing through the round pipe, flows to the positions of the inner dispersion boxes and the outer dispersion boxes, is primarily dispersed by the inner dispersion boxes and the outer dispersion boxes, and is discharged from the bottoms of the inner dispersion boxes and the outer dispersion boxes; the discharged potassium bisulfite solution flows to a splitter plate of the shunting assembly and is shunted again by the splitter plate, and the splitter plate slowly rotates along with the stirring shaft in the shunting process, so that the dispersing area of the potassium bisulfite solution is increased, the potassium bisulfite solution is dispersed and then mixed with the sodium hydrosulfide solution, the stirring time for mixing the potassium bisulfite solution and the sodium hydrosulfide solution is shortened, and the stirring efficiency is improved. The reaction rate of the two is increased, so that the decolorization efficiency of the sodium hydrosulfide solution is improved.

The invention discloses a discharge aiding agent for oil well fracturing and a production method, and relates to the technical field of production of discharge aiding agents. Comprising the following components in parts by weight: 80-95 parts of a basic solution, 0.3-0.9 part of a viscosity modifier, 3-5 parts of a cracking agent, 0.2-0.5 part of a modified dispersant, 6-8 parts of a diethylenetriamine cross-linking agent, 1-3 parts of an acidifying agent, 0.3-0.6 part of a protective agent and 10-30 parts of a modified filler prefabricated solution, the modified dispersant is a lignin modifier obtained by sulfonating and modifying lignin with potassium bisulfite; the modified filler prefabricated liquid is prepared by coating and modifying quartz sand with polytetrafluoroethylene and acrylic resin; the quartz sand is coated with polytetrafluoroethylene and acrylic resin to form a double-layer coating structure with a firm inner layer and a flowing outer layer, so that the mechanical strength, the stability and the high-temperature resistance of the discharge aiding agent are enhanced, and the discharge rate and the discharge aiding rate of the discharge aiding agent are improved.

The application belongs to the technical field of potassium sulfite preparation, and discloses a potassium sulfite preparation system and a preparation method. The preparation system comprises: an absorber, which is used for forming an absorption solution containing potassium bisulfite by controlling the pH of a solution to be less than or equal to 6 through a potassium hydroxide absorption method; an oxygen removal device, whose inlet is connected with the outlet of the absorber; a regulating tank, which is connected with the outlet of the oxygen removal device, is used for supplementing potassium hydroxide and controlling the pH of a solution to be greater than or equal to 8, and obtains a potassium sulfite solution through a reaction; an evaporation crystallizer, whose inlet is connected with the outlet of the regulating tank; a solid-liquid separator, whose inlet is connected with the outlet of the evaporation crystallizer, is used for separating a slurry after crystallization into potassium sulfite solids and a crystallization mother liquor; and a dryer, which is used for drying the potassium sulfite solids to obtain a potassium sulfite product. The application can solve the problems of the influence of carbon dioxide on the quality of the potassium sulfite product and the oxidation of the potassium sulfite, and can improve the purity of the potassium sulfite product.