Papermaking is one of the four great inventions of ancient China. The development of modern papermaking technology has greatly improved the output and quality of all kinds of paper. However, the rapid development of the paper industry has also brought serious pollution to the water body. The paper industry has a long history of foam problems, especially when it comes to pulp and paper wastewater treatment. In order to solve this problem, defoamer manufacturers have developed a new type of polyether modified silicone defoamer, which can effectively solve the foaming problem of papermaking wastewater
In the alkali pulping process, after the resin acid is saponified, the saponified resin acid flows into the biological processor, and after the compressed air is introduced, many yellow foams are generated and float around. When treating wastewater, the resulting foam will reduce the treatment effect of wastewater, cause loss and splashing of wastewater, and cause pollution to the environment. For example, in wastewater treatment, surface aeration can form a large number of bubbles, which hinders the smooth progress of oxygenation, thus hindering the normal operation of the bioreactor and also hindering the normal operation of the bioreactor. It can be seen that the foam in the papermaking wastewater not only affects the operation of the sewage treatment facility, but also directly affects the environment of the water body. Therefore, the treatment of paper wastewater foam has become very important, and polyether modified silicone defoamer, as a high-efficiency defoamer, has the advantages and characteristics of other non-silicone defoamers.
2. Polyether modified silicone defoamer has the advantages of these two types of defoamers.
Polysiloxane defoamer has fast defoaming speed, low surface tension and no physiological toxicity, but its foam inhibition is poor, water solubility is poor, and it is difficult to play a role under high temperature and strong alkali conditions. The polyether defoamer has a good affinity for water, high temperature resistance, and strong alkali resistance, but its defoaming and foam inhibition effects are not ideal.
Polyether modified silicone defoamer is to introduce polyether segments into polysiloxane segments to improve their hydrophilicity and form self-emulsificationAt the same time, the hydrophilicity of the polyether segment can also reduce the affinity and solubility of polysiloxane to the oil phase, so that it has the advantages of the first two defoamers, which not only reduces the surface tension of the two defoamers, but also improves the dispersion of water, makes full use of the synergy between the two, and achieves the purpose of better defoaming and foam suppression effect.
The above content is provided by the "defoamer source manufacturer", if you need **, please indicate the source.