Dilution and addition device of liquid caustic soda for waste paper deinking

Abstract

The invention provides a device for diluting and adding liquid caustic soda for waste paper deinking, which comprises a concentrated liquid caustic storage tank and a liquid caustic adding pump in fluid communication with the concentrated liquid caustic storage tank, and also includes a The liquid alkali dilution equipment between the liquid alkali adding pump, it includes: a water storage tank; a mixer, including a liquid inlet and a liquid outlet, and the liquid inlet and the water storage tank and the concentrated liquid alkali storage tank are respectively passed through the water delivery pipeline and the delivery pipe. The alkali pipeline is in fluid communication; the liquid alkali transfer pump is arranged on the alkali transport pipeline, and is used to pump the concentrated liquid alkali in the concentrated liquid alkali storage tank to the mixer; the weak liquid alkali storage tank includes the weak liquid alkali inlet It is in fluid communication with the weak liquid alkali outlet, the weak liquid alkali inlet is in fluid communication with the liquid outlet of the mixer, and the weak liquid alkali outlet is in fluid communication with the liquid alkali adding pump. The device of the invention can avoid the problems of traditional equipment corrosion and liquid caustic leakage, reduces the cost and improves the deinking effect.

Description

technical field [0001] The invention relates to the technical field of papermaking, and more particularly relates to a device for diluting and adding liquid caustic soda for waste paper deinking. Background technique [0002] The waste paper deinking line workshop usually uses liquid caustic soda with a mass fraction of about 30%. However, due to the relatively low concentration of this kind of liquid caustic soda, the amount of liquid caustic soda used is relatively large, resulting in high purchase and transportation costs for liquid caustic soda. high. In order to solve the problem of high transportation costs, some deinking workshops use liquid caustic soda with a mass fraction of about 50%, but the concentration of liquid caustic soda is high and the corrosion is strong. lead to safety hazards. In addition, when using thicker liquid caustic soda, since there are many stations for adding liquid caustic in the deinking line, (for example) three adding pumps add at diffe...

AI Technical Summary

Problems solved by technology

[0002]The waste paper deinking line workshop usually uses liquid caustic soda with a mass fraction of about 30%. Large, resulting in high transportation costs for the purchase and use of liquid caustic soda

In order to solve the problem of high transportation costs, some deinking workshops use liquid caustic soda with a mass fraction of about 50%. However, the concentration of liquid caustic soda is high and the corrosion is strong. lead to safety hazards

In addition, when using thicker liquid caustic soda, since there are many stations for adding liquid caustic in the deinking line, (for example) three adding pumps are added at different positions, so the amount of liquid caustic in each station is relatively small, which leads to the liquid caustic soda in the pipeline Fluctuations in the flow rate are large, especially easy to cause the pH value of the system to be unstable, which will further affect the ability of the deinking and concentration equipment and the quality of the deinking pulp

Images