Wastewater treatment defoamer of those knowledge
Due to the rapid growth of urban population, industrial wastewater treatment problems are becoming more and more prominent. The paper mill wastewater emissions are large, so the national standards for wastewater discharge is also very strict control, which makes some paper mills in the wastewater discharge must be carried out when the wastewater treatment.
Many factories say that in the process of wastewater treatment, there is often foam, which will affect the growth of organisms in the water, and the operation of the treatment process. To address this problem, just add the wastewater treatment defoamer when treating wastewater can be a good solution to a series of problems brought about by the foam.
Wastewater treatment defoamer, has a good defoaming speed, can be a long-lasting inhibition of foam. Foaming system for many industries are very good. For example, pharmaceutical, paper, leather printing and dyeing city sewage treatment process and chemical cleaning of the foam generated by the industry. Wastewater treatment defoamer using environmentally friendly formulations, the product itself is non-toxic and harmless, does not affect the characteristics of bacterial reproduction.
Wastewater treatment defoamer is a kind of high-efficiency defoamer, which is mainly made of modified silicone polyether and modified siloxane compound refined by special technology.
What are the characteristics of paper defoamer?
The process of papermaking is mainly divided into two major steps, one is the washing of pulp and the other is the paper copying, whether that step is inevitable foam, so you need to use antifoam agent to deal with, antifoam agent 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 foam will be followed by cleaning and transport and bleaching to bring a certain degree of trouble resulting in a decline in the quality of the pulp, and therefore the need to use antifoam agent to deal with. Defoamer used in the pulp process mainly hydrocarbon defoamer and silicone emulsion defoamer two categories. This kind of defoamer can quickly eliminate the foam generated by lignin and some surfactants, and the effect is especially obvious in the pulping and washing.
For the papermaking process, if you do not solve the papermaking process foam, it will lead to paper breaks, white water level fluctuations, pump frequency fluctuations, etc., directly affecting the stability and quality of paper production. The paper defoamer can effectively inhibit 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 pulp:
It is mainly used to control foam generated in alkaline pulping, paper washing, bamboo pulp, cane pulp, neutral pulping, paper pulp, pulp rinsing, screening, bleaching, water treatment, and plant fibre pulp production. Has the following characteristics:
1, strong defoaming and foam-breaking properties;.
2, fast and thorough improvement of filter drainage.
3, very good mutual solubility in black liquor, applicable to the production conditions of pulp mills.
4、Improve rinsing efficiency.
5、Reduce salt loss and improve pulp quality.
6, Reduce the content of bleaching chemicals, to meet the environmental requirements.
7, The raw material is biodegradable, non-toxic and harmless.
Defoamer for paper making and paper copying:
Paper defoamer for paper making is used in paper making white water; it can eliminate the surface foam containing rosin gum, the air bubbles adsorbed on the fibres in water, the surface foam of the white water system with modified starch in water, the foam in the water of the system containing polyacrylamide retention aid, and the surface foam of the white water system containing AKD emulsion. Its characteristics are mainly:
1, fast defoaming speed, long foam suppression time;.
2, good dispersibility, dynamic defoaming, does not contain silicon.
3, has good product stability.
What factors affect the defoaming effect of defoamer?
Defoamers are widely used in various industries, the type of defoamer is divided into oil-based and water-based, different industries use different kinds of defoamers. Paper defoamer can effectively control the pulp, foam overflow and improve the quality of paper. It is widely used in paper making system defoaming, and can also be used in paper making sewage treatment, antifreeze, distillation system defoaming.
Specialising in defoamers, focusing on foam problems in various industries
