Why should defoamer be added to the paper pulping process?
Due to the rapid growth of urban population, the problem of industrial wastewater treatment is becoming more and more prominent. Paper mills discharge a large amount of wastewater, so the national wastewater discharge standards are strictly controlled, which makes it necessary for some paper mills to treat their wastewater when discharging it. Many mills report that air bubbles often occur during the treatment of wastewater, which affects water reproduction and the operation of the process. In order to solve this problem, a series of problems can be well solved by simply adding a wastewater treatment defoamer when treating wastewater.
Wastewater treatment defoamer with good defoaming speed and long-lasting foam suppression. Foaming system for a number of industries are very good. For example, pharmaceutical, paper, leather printing and dyeing city sewage treatment process and chemical cleaning foam generated by the industry. The wastewater treatment defoamer is an environmentally friendly formula, which is harmless and does not interfere with mushroom growth. The wastewater treatment defoamer is a highly efficient defoamer made of modified silicone polyethers compounded with modified siloxanes using a special process.
In the process of papermaking pulp, as 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 cleaning and transportation and bleaching to bring some trouble resulting in a decline in pulp quality, so the need to use defoamers to deal with. Pulping process used in the paper pulp defoamer mainly hydrocarbon defoamer and silicone emulsion type defoamer two categories. This type of antifoam agent can quickly lignin and some surfactants generated by the foam treatment, the use of the effect in the pulping and washing of the pulp 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 defoamer can effectively inhibit the white water foaming, while for the fine bubbles between the fiber entrainment, the foam on the surface of the pulp can be dealt with. Antifoam agent can also dissolve the air within the pulp, deal with the surface of the large bubbles, so you can avoid the formation of holes, reduce the paper breaks and overflow of the pulp storage tank, thus ensuring the loss of pulp fibers and chemicals, so that the uniformity and quality of the paper have been improved.
Paper Pulp Defoamer mainly used in controlling the foam generated in the production of alkaline pulping, paper washing, bamboo pulp, cane pulp, neutral pulping, pulp, pulp rinsing, screening, bleaching, water treatment, plant fiber pulp.
Paper pulp defoamer has the following characteristics:
1, defoamer 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 and improve pulp quality.
6、Defoamer can reduce the content of bleaching chemicals, to meet the environmental requirements.
7, Defoamer raw materials are biodegradable and harmless.
