Method for eliminating pollution of closed papermaking factory

Abstract

The invention relates to a method for eliminating the pollution of a closed papermaking factory, which is the development in the fields of papermaking, pulping and environmental pollution. The method has the technical characteristics that plant haulms of straws, reed, mulberry shoot, cotton stalks, and the like are cut and pulverized by a bamboo cutter, chaff cutting and dust removing equipment and a pulverizer of an old factory; after being screened, the plant haulms are transmitted in a plant fiber light-electricity-oxygen comprehensive generator to react for 30 minutes so that the pulp is defiberized; after a lignin chromophore and an auxochrome are broken, the pulp is transmitted in a globe digester lined by stainless steel and heated to 120 DEG C, and the temperature is preserved for 30 minutes to 60 minutes so that the pulp is cured; and after being unloaded, the pulp is further defiberized by a pulp grinder with high concentration, screened and deslagged by the prior screening and deslagging equipment as well as re-bleached and dispels by the prior bleaching pool according to the whiteness degree and the defiberized degree of the pulp so as to prepare the qualified pulp. The whole pulping process does not have black liquor, poisonous and harmful substances and total chlorine, and the wastewater is circularly used after being processed and not discharged.

Description

technical field [0001] The invention is a pioneering invention in the fields of papermaking, pulping and environmental protection. Background technique [0002] Traditional papermaking pulping uses alkali cooking and chlorine bleaching to form a large amount of "black liquor" and "white liquor", causing serious water and air pollution. The country has closed down more than 30,000 small and medium-sized papermaking enterprises. However, since the alkali recovery rate is only 80% and the sewage treatment rate is only about 60%, the treatment cost increases by 300-500 yuan per ton of pulp, and the basic investment is 3 10,000 tons of pulp needs 78 million yuan. Using "Plant Fiber Photoelectric Oxygen Comprehensive Generator" (Patent No.: 200620138146.3) to transform the closed pulp mill can achieve less water, less dissolution, no chlorine, waste water reuse after treatment, waste utilization, revitalization the purpose of the asset. Contents of the invention [0003] The ...

AI Technical Summary

Problems solved by technology

[0002] Traditional papermaking pulping uses alkali cooking and chlorine bleaching to form a large amount of "black liquor" and "white liquor", causing serious water and air pollution. The country has closed down more than 30,000 small and medium-sized papermaking enterprises. However, since the alkali recovery rate is only 80% and the sewage treatment rate is only about 60%, the treatment cost increases by 300-500 yuan per ton of pulp, and the basic investment is 3 10,000 tons of pulp needs 78 million yuan