Low-carbon papermaking method

Abstract

The invention belongs to the field of papermaking and particularly relates to a low-carbon papermaking method which aims to solve the problems about raw materials, environments and energy sources in the development of papermaking industries in China. The low-carbon papermaking method specifically comprises the following steps of: in order to realize low-carbon papermaking, comprehensively taking crop straws as an energy source to produce secondary high-pressure steam to generate power and taking the crop straws as raw materials to make paper pulp and separate the paper pulp, pollutant black liquid and bleaching effluent; and making various paper through the paper pulp, preparing sodium ligninsulfonate from the pollutant black liquid, and preparing anhydrous calcium chloride from chlorine-containing bleaching sewage. The low-carbon papermaking method disclosed by the invention has the advantages of realizing low-carbon papermaking ecological industry, circular economy, and CP (cleaner production) zero emission by virtue of the comprehensive utilization of the straws, and solves the problems about the raw materials, the environment and the energy sources in the development of the papermaking industries.

Description

[0001] technical field [0002] The invention belongs to the field of papermaking, and in particular relates to a low-carbon papermaking method using crop stalks. . Background technique [0003] my country lacks wood resources, and domestic pulp is less than one-tenth of the amount used in papermaking, which is far from meeting the growing material and cultural needs of the Chinese people. In the half century after the founding of the People's Republic of China, my country's paper industry has gone through a development path of straw pulp papermaking with "grass fiber as the main raw material and small papermaking as the main body". Since Cai Lun invented papermaking, straw pulp papermaking in my country has a history of nearly 2,000 years. Especially after the founding of the People's Republic of China, "walking the road of its own industrial development" has accumulated rich experience in straw pulp papermaking. The paper made of straw pulp and a small amount of other p...

AI Technical Summary

Problems solved by technology

It has been 27 years since our country proposed the integration of forestry and paper, and the per capita paper consumption has doubled several times, but until now the paper plantation has only accounted for 2% of the original plan, and the domestic wood pulp has zero growth, which is useless.

Images