4results about How to "Increase pulp yield" patented technology

This invention provides a low-cost and environmentally friendly papermaking pulping process, comprising the following steps: S1. Pretreatment of papermaking fiber plant raw materials. S2. Oxy-alkali cooking: The pretreated papermaking fiber plant raw materials are mixed with an aqueous sodium carbonate solution, and cooked for 0.5–5 hours using oxygen as an oxidant. Then, sodium hydroxide is added, and cooking continues for 0.3–2 hours. Finally, the pulp and black liquor are separated by pressing. S3. Black liquor treatment: The black liquor is mixed with fiber waste, pressed, and burned as biomass fuel. S4. Recovery and causticization. This papermaking pulping process uses sodium carbonate and a small amount of sodium hydroxide for staged oxy-alkali pulping, and the generated black liquor is mixed with fiber waste and burned to recover sodium carbonate and heat, reducing the causticization rate and pulping costs.

The present application relates to the technical field of tailings treatment of cold grinding machine, in particular to a fine screen tailings treatment system, which comprises a grinding roller arranged in the cold grinding machine body, a liquid discharge opening arranged in the cold grinding machine body, an output pipe arranged at the output end of the material pumping body, and a spiral pulp extruder arranged on the surface of the material guide frame; the beneficial effects are as follows: firstly, the wood pulp tailings are extruded by the spiral pulp extruder and then enter the cold grinding machine body, then the wood pulp tailings enter the cold grinding machine body and then flow out through the liquid discharge opening, so that the subsequent papermaking finished product pool is convenient, the unqualified tailings are returned to the cold grinding machine body through the cooperation of the material pumping body, the material conveying pipe and the output pipe, and then the tailings are secondarily ground by the grinding roller or the output pipe is connected to the side of the spiral pulp extruder to make the tailings circulate again, the purpose is to improve the wood chip pulp yield and reduce the production cost, and the problem of low utilization rate of actual wood pulp is avoided.

A kind of paper pulp mechanical pressurization preparation system, the system includes pulper, cooking device, washing device, screening device, bleaching device, concentration device, pulper, cooking device, pulp filter press, washing device, screening device, bleaching device and concentration device are sequentially connected installation, washing device is made of three to five stage washing machine, wherein still including pulp filter press;Pulp filter press is connected and installed at the rear end of cooking device or the front end of any stage washing machine in the first three stages of washing device.The system of the utility model improves the pulp yield of paper pulp pulping, wood raw material conversion rate, environmental protection and the quality and value of paper pulp.

This invention relates to the field of pulping and cooking, and discloses a pulping and cooking system, including a cooking pot, a pumping unit, and a receiving tank. The receiving tank includes a white liquor tank, a warm black liquor tank, and a hot black liquor tank. The white liquor tank contains white liquor, the warm black liquor tank contains warm black liquor, and the hot black liquor tank contains hot black liquor. The cooking pot is connected to the white liquor tank, the warm black liquor tank, and the hot black liquor tank, respectively, to reduce cooking time and increase pulp yield.