Impurity removing system for Chinese art paper black liquor

Abstract

The invention belongs to the technical field of Chinese art paper production and particularly relates to an impurity removing system for Chinese art paper black liquor. The impurity removing system comprises a filtering unit, wherein the filtering unit comprises a tubular frame and a filter screen attached to the frame and is arranged above a filtrate pool, a black liquor inlet pipe is communicated with a tubular cavity of the filtering unit, and the filtrate pool is connected with a black liquor treatment system. By adopting the scheme, the effective area of the filter screen is increased without frequent replacement of the filter screen or frequent filter residue clearing, the working amount is decreased, and the filtering efficiency is also improved; the sustainability of a follow-up black liquor treatment system is improved by arranging the filtrate pool, and the situation is avoided that the black liquor treatment system stops operating due to filter screen replacement. By adopting the impurity removing system, solid impurities in black liquor are fully filtered, the phenomena are avoided that solid impurities scale on a plate sheet of a heating device in the black liquor treatment process and an atomizing spray gun is blocked, and the impurity content in an obtained material after black liquor treatment is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of rice paper production, and in particular relates to a system for removing impurities from rice paper black liquor. Background technique [0002] In the production process of rice paper, a large amount of black liquor will be produced through steaming and cooking of sandalwood bark, and the main components of black liquor, lignin and pentose sugar, will be recovered through steps such as concentration, heating and evaporation. The applicant filed an invention patent application titled "A Processing System for Xuan Paper Black Liquor" on November 20, 2018 (it also applied for a utility model patent on the same day), which disclosed a method for processing black liquor and using it in solid form The treatment system for recovering lignin, pentose and other substances, in which the black liquor needs to pass through the atomization spray gun before entering the main tower. In order to speed up the processing ...

AI Technical Summary

Problems solved by technology

[0003] But in actual production, because except containing soluble lignin, pentose etc. in the black liquor, there are also solid impurities such as a large amount of sandalwood bark shells, endothelial fibers, etc., when these solid impurities pass through the heating equipment, they will form on the plates of the heating equipment. The scale will affect the heating effect, and it is easy to block the nozzle when it enters the atomizing spray gun, which seriously hinders the normal operation of the black liquor treatment system, and these sandalwood bark and inner skin fibers enter the recovered solid material, which also affects the solid material. Subsequent processing

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