Preparation method of cation modified polyacrylamide as well as sewage treatment method

Abstract

The invention discloses a cation modified polyacrylamide water purification agent which is developed to realize flocculating purification of various sewage components, and can optimize the step conditions from preparation to use by aiming at the water purification effect and the application process so as to provide a preparation method of cation modified polyacrylamide as well as a sewage treatment method, which are strong in water purification comprehensive function and simple in process. The preparation method of the cation modified polyacrylamide comprises the following steps: (1) mixing; (2) removing oxygen; (3) stirring; (4) adding a composite initiator; (5) heating until transparent colloid is obtained and stopping heating; and (6) cooling, drying and pulverizing. The sewage treatment method comprises the following steps: (1) adding aluminum polychloride into sewage, and mixing and stirring; (2) adding the cation modified polyacrylamide, and mixing and stirring; (3) performing static flocculation settlement; and (4) filtering, and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of cationic modified polyacrylamide and a sewage treatment method. Background technique [0002] With the rapid improvement of urbanization and industrialization in our country, the total amount of sewage has increased, and the composition of sewage has become increasingly complex. From the perspective of natural environmental protection and sustainable development of the national economy, the relevant national environmental protection discharge standards have become more and more stringent. This reality objectively requires the innovation and upgrading of sewage treatment and environmental protection technology to adapt to it. At present, urban sewage is mainly collected and purified by water treatment plants before being discharged into the natural water system. The core process is the flocculation and sedimentation of sewage components with a spec...

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Problems solved by technology

[0003] At present, the main component of the water purifying agent used in the flocculation and sedimentation process is polymeric inorganic salts such as polyaluminum chloride, and the corresponding cost is relatively low, but the effect is not ideal according to the national environmental assessment standard. Polyacrylamide compounds have been introduced into the composition of water purifiers in recent years, but most of these compounds on the market are simple polyacrylamides with a single polymer unit structure, and there are still many functionalized polyacrylamides for domestic urban sewage treatment. There is a big blank, and the corresponding use effect is not ideal. This has also led to the innovation of water purifiers in recent years, which mainly focuses on the introduction of more compounds and more complex water purifiers.

[0004] Although this type of technology has realized the comprehensive treatment of various sewage components to a certain extent, it should be pointed out that the water purifier itself is also a type of impurities, and its complex components will also cause more residual impurities in the treated water. Therefore, the innovation of water purifiers that deserves more attention should focus on the use of purifiers with the simplest composition to achieve multifunctional treatment of various pollutant components, which requires the development of new water purifiers with a single chemical composition and multiple functions. Combined with the current water purification process, one of the most feasible directions to achieve this requirement is to carry out functional design and preparation of the chemical structure of polyacrylamide from the source and to screen the appropriate use process and conditions to realize the composition of water purification agent and application process. Simplify and improve the purification effect, thus adapting to the national environmental protection regulations and standards

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