Preparation of a descaling and antiscaling agent for ash removal water system

Abstract

The preparation of a kind of descaling and antiscaling agent used in the deashing water system provided by the present invention is prepared raw materials in parts by weight, consisting of 28-35 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 27 parts of polyol phosphate -36 parts, 16-23 parts of glycolic acid, 19-25 parts of pure water; its best preparation: 30 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 30 parts of polyol phosphate, 20 parts of glycolic acid, It is composed of 20 parts of pure water; when preparing, add pure water first, then put its components into the reaction kettle in turn, stir for 40-50 minutes, and control the temperature at 20-35°C to obtain the product; among them, itaconic acid-styrenesulfonic acid- For the synthesis of acrylic acid copolymer, take 10-14 parts of itaconic acid, 5-7 parts of styrenesulfonic acid, 3-5 parts of isopropanol, and 30-38 parts of pure water, put them into the reaction kettle in turn, stir, and heat to 95°C , dropwise add 22-25 parts of acrylic acid and 2 parts of ammonium persulfate solution (dilute with 18 parts of water first), control the dropwise addition within 30 minutes, keep warm for 110-122 minutes, drop to room temperature and discharge, pH value 1.5-2.5 , It can be obtained when it is light yellow transparent liquid. This product is used for descaling and antiscaling of ash removal water in power plants and reinjection water in oil fields, and the dosage is 5-10mg / L.

Description

technical field [0001] The invention relates to a descaling and antiscaling agent for reuse of ash removal water, in particular to the preparation of an efficient descaling and antiscaling agent for a closed circulation system of ash removal water. Background technique [0002] At present, all thermal power plants have generally treated and recycled production wastewater to achieve zero discharge in the wastewater system. The closed loop circulation of ash removal water can not only reduce the pollution of ash removal water to natural water bodies, but also save water. However, for power plants with dry ash removal and wet ash discharge, the scaling problem of the ash removal water backwater is common, often due to the serious scaling of the return water pump, valves and pipelines, the output of the pump is reduced, and the reuse of the ash removal water is endangered in severe cases normal operation of the system. The ash scale is the deposit of the contact reaction betwe...

AI Technical Summary

Problems solved by technology

However, for power plants with dry ash removal and wet ash discharge, the scaling problem of the ash removal water backwater is common, often due to the serious scaling of the return water pump, valves and pipelines, the output of the pump is reduced, and the reuse of the ash removal water is endangered in severe cases normal operation of the system

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