Scale inhibitor for sewage treatment, and preparation method thereof

Abstract

The invention discloses a scale inhibitor for sewage treatment. The scale inhibitor is a copolymer synthesized through a reaction of 2.75-5.34 mass% of maleic anhydride, 1.86-1.93 mass% of sodium p-styrenesulfonate, 0.94-1.21 mass% of hydroxyethyl methylacrylate, 0.45-0.82 mass% of an initiator, 0.45-0.82 mass% of a molecular regulator and 90.11-93.45 mass% of distilled water. The invention also discloses a preparation method of the scale inhibitor. The preparation method comprises the following steps: weighing certain amounts of the maleic anhydride, odium p-styrenesulfonate, hydroxyethyl methacrylate, the molecular regulator and distilled water, heating to dissolve above materials, adding the initiator, and finally carrying out precipitation purification, suction filtration and vacuum drying to finally obtain the finished scale inhibitor. The scale inhibitor disclosed in the invention has the advantages of solving of low scale inhibition efficiency and pollution of nitrogen and phosphorus elements to environment of existing scale inhibitors, avoiding of the problem of reverse osmosis membrane scaling in a water treatment system, simple synthesis method and low cost.

Description

technical field [0001] The invention belongs to the technical field of water treatment chemicals, and in particular relates to a scale inhibitor for sewage treatment, and also relates to a preparation method of the scale inhibitor. Background technique [0002] With the increasing shortage of water resources and the further deterioration of the water quality environment, sewage treatment has become a key research object in the field of environment, and scaling often occurs in various types of sewage, and high scaling will be used in most water treatment technologies. It will seriously affect the instruments and equipment, and then affect its purification effect on sewage. In the water treatment method, the reverse osmosis method has the advantages of saving land area, low operating cost, no secondary pollution, stable effluent water quality and high degree of automation control. It is widely used and has become the main technology of pure water preparation in many industrie...

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Problems solved by technology

[0002] With the increasing shortage of water resources and the further deterioration of the water quality environment, sewage treatment has become a key research object in the field of environment, and scaling often occurs in various types of sewage, and high scaling will be used in most water treatment technologies. serious impact on equipment, etc., which in turn affects its purification effect on sewage

In the water treatment method, the reverse osmosis method has the advantages of saving land area, low operating cost, no secondary pollution, stable effluent water quality and high degree of automation control. It is widely used and has become the main technology for pure water preparation in many industries; however, in the actual operation process, the fouling on the surface of the reverse osmosis membrane will seriously affect the normal and stable operation of the system, deteriorate the quality of the effluent, shorten the service life of the reverse osmosis membrane, Increase the production cost of the enterprise; adding antiscalant is an important means to prevent scaling

[0003] The currently developed environmentally friendly antiscalants such as polyepoxysuccinic acid and polyaspartic acid have unsatisfactory antiscaling effects in practical applications, while phosphorus-containing antiscalants on the market have better Antiscalant effect, but cannot meet the requirements of environmental protection, so it is necessary to provide an antiscalant with good antiscaling effect and environment friendly

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