Antiscaling corrosion inhibitor of boiler and use thereof

Abstract

The invention opened a method of boiler antiscale slow release agent and the employing method. The ingredient of the weight fraction was: EDTMP 2-5g, NaOH 80-120g, NaCO3 180-220, the method was: a. adding one portion of antiscale slow release agent due to the evaporating capacity per ton water, keep the water alkalinity, was 7-8 mgN / L, pH was 10-11.5; b. routinely pollution discharge while the boiler application. Its advantages include no need for factory building and equipment, saving the salt and treating water, no need for assay, low cost, save fuel, yield good ecnomic returns and social returens.

Description

technical field [0001] The invention relates to an antiscaling agent for medium and low pressure boilers and its application method. Background technique [0002] Most of the boiler water in our country uses underground water sources. The water quality contains high calcium and magnesium salts, and the hardness is generally 5-6 mg / l, and the highest can reach 15-16 mg / l. Most of the boilers adopt simple out-of-furnace treatment process, about 20% of the boilers use the caustic soda method, soda ash method and trisodium phosphate method of the Soviet Union in the 1920s and 1930s, and 30% of the boilers use the " For the water treatment process of "three sodium and one glue" (sodium hydroxide, sodium carbonate, trisodium phosphate and tannin extract), 40% of the boilers adopt single-stage sodium ion exchange technology, and 10% of the boiler water is not treated. Due to the backward water treatment process, most boilers scale very quickly, and some boi...

AI Technical Summary

Problems solved by technology

Due to the backward water treatment process, most boilers foul quickly, and some of them are blocked in half a year, and some boiler tubes explode due to fouling, which not only wastes a lot of fuel, but also directly threatens the safety of equipment and people.