Method for reducing water-soluble chemical oxygen consumption in reconstruction tobacco leaf production white water through papermaking method

Abstract

The invention discloses a method for reducing water-soluble chemical oxygen consumption in reconstruction tobacco leaf production white water through a papermaking method, and the method comprises the steps of weighing 3-8% of goods wood pulp in amounts of weight according to a reconstruction tobacco leaf raw materials formula in an extraction operation and putting the goods wood pulp in a waterpower pulper; adding hot water to untwine so as to prepare a goods wood pulp slurry whose quality concentration is no more than 10%; controlling absolute dry addition of the goods wood pulp by an electronic flowmeter; conveying the goods wood pulp to a tobacco raw material extractor through a slag and slurry pump and mixing the goods wood pulp with the tobacco raw material evenly; and extracting to obtain a mixed operation product of the reconstruction tobacco leaf raw material and the goods wood pulp; filtering most extract from the product and then putting the product in a compressor for squeezing to realize solid-liquid separation. The liquid is used as a reconstruction tobacco leaf production extract to take away most organic component from the tobacco raw material, and is coated to the reconstruction tobacco leaf product again through a subsequent condensation production operation; and the solid is treated with operations like slurry beating and paper making to obtain a reconstruction tobacco leaf film base. The problems like high thick white water chemical oxygen consumption in paper making section, high load in a processing system, and high cost in water treatment to meet the water discharge standard are solved.

Description

technical field [0001] The invention belongs to the technical field of reconstituted tobacco leaf production by papermaking method. Background technique [0002] The production of reconstituted tobacco leaves by papermaking method is to use tobacco leaf fragments, tobacco stems and other non-tobacco fibers produced in the process of cigarette processing as mixed raw materials, after solvent extraction and concentration of the extract, it is used as a coating solution, and the extracted solids are processed by the papermaking method. Production processes such as beating, copying and molding, coating liquid backcoating, drying and cutting, etc., to obtain reconstituted tobacco leaves that can be used by the cigarette industry. [0003] Tobacco sheets, tobacco stems and tobacco stems, which are the main raw materials for the production of reconstituted tobacco leaves by the papermaking method, are mainly extracted with hot water at 70-85°C as a solvent during the production pro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies in the prior art, to provide a method for reducing the water-soluble chemical oxygen consumption in white water for the production of reconstituted tobacco leaves by papermaking method, so as to solve the chemical consumption of concentrated white water in the production process of reconstituted tobacco leaves by papermaking method. High oxygen content, high load on the treatment system, and high operating costs for water treatment to meet discharge standards