Cold-immersion mechanical pulping process for xyloid raw materials

Abstract

The invention discloses a new paper making pulping technology of wood raw material cold-maceration machinery, which comprises the following steps: 1. grinding wood raw material into yarn or dividing yarn through grinding-abrading machine; 2. proceeding cold immersing the raw material in the pool for 1-3 h; 3. washing and shoving; 4. dosing and heating two segmented high-density pulp to bleach; 5. keeping temperature to bleach; 6. washing to extract white to produce high-whiteness paper. The invention saves energy without waste water and gas, which produces high-quality low-cost paper for paper making industry.

Description

1. Technical field: [0001] The invention relates to a new pulping and papermaking process, in particular to a new process for pulping clean pulped woody raw materials by cold soaking and mechanical pulping. 2. Background technology: [0002] Papermaking is one of China's four great inventions, with a history of more than 1,800 years. However, my country's pulping technology is far behind foreign countries. Some papermaking companies have introduced a large number of foreign equipment and technologies. Now, my country is also the largest waste paper producer. Importing countries, and the imported waste paper contains a lot of highly polluting garbage paper, which is polluting our own homes and rivers, lakes, and lakes. According to statistics, in 2005, my country's waste paper imports reached 15 million tons. [0003] At present, the production capacity of wood pulp in our country is relatively low, and some of the pulping technologies still used are foreign pulping methods su...

AI Technical Summary

Problems solved by technology

Kraft pulping has been banned by German authorities and resisted by people since it was born in Germany, because it is a pulping method with high pollution, high energy consumption and low pulp yield; CTMP pulping method Although the pollution is small, the investment is high, the energy consumption is high, the pulp yield is high, and the whiteness is low; the equipment of APMP pulping process is lower than that of CTMP, but it is also a high energy-consuming pulping method, and the whiteness reaches 73- 75 degrees, but the pulp has a high yellowing value

[0004] I have applied for a Chinese invention patent, the patent number is 2005100436308, "Broad-leaved wood cold soaking environmental protection rapid pulping process", its shortcomings are: first, the pulping process is complicated; second, it is only for broad-leaved plants pulping