Pre-treatment system of pulping waste liquid

A technology for pulping waste liquid and pretreatment, applied in the field of papermaking and pulping, can solve problems such as high cost, and achieve the effects of improving alkali recovery rate, improving use efficiency and saving materials

Active Publication Date: 2019-07-26
GOLD EAST PAPER JIANGSU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a pretreatment system for pulping waste liquid, which can improve the problems of high cost caused by adjusting the pH value of pulping waste liquid in the prior art, and improve the recycling rate of waste liquid

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  • Pre-treatment system of pulping waste liquid

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0011] refer to figure 1 and figure 2 , an embodiment of the pretreatment system of the pulping waste liquid in the present invention, wherein the pulping waste liquid is acidic, and the pretreatment system of the pulping waste liquid is arranged before the evaporation system 20 of the pulping waste liquid, and an embodiment of the pretreatment system includes The first green liquid pipeline 11 and the adjustment control device 12 . One end of the first gre...

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Abstract

The invention embodiment provides a pre-treatment system of pulping waste liquid. The pulping waste liquid is slightly acidic, the pre-treatment system is arranged before an evaporation system of thepulping waste liquid, and comprises a first green liquid pipeline, and an adjusting controlling device; one end of the first green liquid pipeline is connected with a first pipeline which is used forintroduction of the pulping waste liquid into the evaporation system, and the other end is connected with an original green liquid pipeline, and is used for introducing the green liquid from the original green liquid pipeline into the first pipeline, so that the pH value of the pulping waste liquid is adjusted to a preset valve; the adjusting controlling device is arranged on the first green liquid pipeline and / or the first pipeline, and is used for adjusting and controlling the adding amount of the green liquid, so that the pH value of the pulping waste liquid is capable of satisfying presetrequirements before entering into the evaporation system. The above pre-treatment method is capable of reducing cost, and increasing recycling rate of the pulping waste liquid.

Description

technical field [0001] The invention relates to the field of papermaking and pulping, in particular to a pretreatment system for pulping waste liquid. Background technique [0002] With the development of the economy, people's demand for paper is getting stronger and stronger, and the papermaking industry and papermaking technology have also been developed rapidly, but the environmental pollution caused by the papermaking industry still plagues people for a long time. Pulping waste liquor in papermaking is the main source of pollution. Pulping waste liquid is directly discharged into rivers and oceans, which will cause eutrophication in local waters and destroy the original ecological balance. [0003] At present, the pulping waste liquid will be recycled, such as alkali recovery, etc., but due to the strong acid corrosion of the pulping waste liquid, it is easy to cause problems such as equipment and pipeline corrosion, resulting in the condensed water after the pulping wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/28
CPCC02F1/043C02F1/048C02F1/66C02F2103/28C02F2209/06
Inventor 陈卫国李松庄晓俊
Owner GOLD EAST PAPER JIANGSU
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