Multifunctional dirty removing agent for boiler

Abstract

The invention relates to a dirty removing agent, in particular to the dirty removing agent for a boiler. The dirty removing agent is non-toxic and free of pollution, and has descaling and rust removal functions. The dirty removing agent is prepared by the following raw materials in parts by weight: N,N-dimethyldodecylamine-N-oxide sol, triethanolamine, sodium hexametaphosphate, propionic acid, butyric acid, polyacrylic acid, formic acid and water in a ratio of 6-20:3-12:1-10:0.5-5:2-10: 20-30:0.1-0.5:80-100. The dirty removing agent is safe and free of corrosion, low in metal corrosion rate in a washing process, almost free of any corrosion damage on the boiler and high in descaling ratio, is capable of effectively dissolving scales in various types, is strong in water dissolubility capability, and has double functions of descaling and rust removal. Waste liquid has no pollution, the dirty removing agent is non-toxic and free of damage; the washing waste liquid has no damage to animals and plants; and direct discharge of the washing waste liquid cannot pollute the environment.

Description

technical field [0001] The invention relates to a descaling agent, in particular to a boiler descaling agent which is non-toxic, non-polluting, and has functions of descaling and rust removal. Background technique [0002] After the boiler runs for a long time, scale and rust problems will inevitably occur. After the boiler is scaled, it will cause safety accidents: the scaling is very harmful to the safe operation of the boiler, and it is easy to cause overheating deformation, blisters, cracks, etc. of the boiler heat transfer surface. Safety accidents such as leaks, pipe bursts and even explosions cause significant economic losses to enterprises. In addition, the boiler scale will increase the energy consumption cost: the boiler scale will greatly increase the operating energy consumption, and 1 mm of scale can consume 8-10% more energy, which will greatly increase the production cost of the enterprise. Nowadays, in order to prevent boiler scaling, the ordinary pickling ...

AI Technical Summary

Problems solved by technology

[0002] After a long period of boiler operation, scale and rust problems inevitably appear. Scaling of the boiler will cause safety accidents: scaling is very harmful to the safe operation of the boiler, and it is easy to cause overheating and deformation of the boiler heat transfer surface, bulging, cracks, Safety accidents such as leaks, pipe bursts and even explosions have caused major economic losses to the company

In addition, boiler scaling will increase energy consumption costs: boiler scaling will greatly increase operating energy consumption, and 1 mm of scale can consume 8-10% more energy, which will greatly increase the production cost of the enterprise

Nowadays, in order to prevent boiler fouling, the ordinary pickling boiler method is generally selected. The ordinary pickling boiler method has many technical disadvantages: 1. It is highly corrosive and shortens the service life of the boiler. The corrosion and hydrogen permeation of the boiler metal caused by the pickling solution Damage, resulting in increased maintenance costs and shortened service life of the boiler

Improper pickling operation is likely to cause serious corrosion accidents such as serious thinning of boiler pressure parts, leakage and perforation, hydrogen embrittlement cracks, etc., and make the boiler scrapped in advance

2. The cleaning rate is low, and it is ineffective for insoluble scale

Pickling can only clean carbonate scale, but it cannot clean the refractory scale such as sulfate and silicide that are commonly found on the heat transfer surface of boilers