Selection of defoamer for paper industry
The process of papermaking is mainly divided into two major steps, one is to wash the pulp and the other is to copy the paper, no matter that step is inevitable to produce foam, so you need to use defoamer to deal with the defoamer classification there are many.
Pulping process due to the pulp contains fatty acids, resin acids and other natural substances, after cooking liquid, chemical washing will generate fatty acid soap, fatty acid soap and other foaming substances, a large number of bubbles will be followed by the cleaning and transport and bleaching to bring a certain degree of trouble resulting in a decline in pulp quality, so the need to use paper defoamer to deal with. Defoamer for paper industry used in the pulping process mainly hydrocarbon defoamer and silicone emulsion defoamer two categories. This kind of antifoam can quickly eliminate the lignin and some surfactant foam, the use of the effect in the pulp washing time is particularly obvious.
For the paper making process, if the foam generated by the paper making process is not solved, it will lead to paper break, white water level fluctuation, pump frequency fluctuation, etc., which directly affects the stability and quality of paper production. The paper making defoamer can effectively inhibit the white water foaming, while the fibre entrapped in the fine bubbles, the foam on the surface of the pulp can be eliminated. Defoamer can also dissolve the air within the pulp, eliminate the large bubbles on the water surface, which can avoid the formation of holes, reduce the paper breaks and overflow of the pulp storage tank, thus ensuring the loss of pulp fibres and chemicals, so that the uniformity and quality of the paper have been improved.
Defoamer for paper making pulp: mainly used to control the foam generated in alkaline pulping, paper washing, bamboo pulp, cane pulp, neutral pulp, paper pulp, pulp rinsing, screening, bleaching, water treatment, plant fibre pulp production. It has the following characteristics:
1, Antifoam has strong defoaming, foam-breaking sex;.
2、Defoamer can quickly and thoroughly improve the filter drainage.
3、Defoamer can be well dissolved in the black liquor, applicable to the production conditions of the pulp mill.
4、Defoamer can improve rinsing efficiency.
5、Defoamer can reduce salt loss to improve pulp quality.
7, Antifoam raw materials are biodegradable, non-toxic and harmless.
RISE Chemical has years of experience in defoaming in the paper industry, providing targeted defoaming solutions and cost-effective defoaming agents to save defoaming costs for friends in the paper industry.
