Phosphorus-free treatment agent for boiler water as well as preparation and application of treatment agent

Abstract

The invention relates to a phosphorus-free treatment agent for boiler water as well as preparation and application of the treatment agent. The treatment agent is prepared from the following raw material components in percentages by mass: 16-30% of modified polyaspartic acid, 10-20% of N-(3,4-dihydroxyphenethyl)acrylamide, 10-16% of a pH regulator, 3-8% of a deoxidant, 2-6% of a film-forming auxiliary agent, and the balance of deionized water. The treatment agent is prepared by the following steps: adding the deionized water into a reaction kettle according to the mass percentage content, adding the modified polyaspartic acid and the N-(3,4-dihydroxyphenethyl)acrylamide, performing full and uniform stirring, sequentially adding the deoxidant, the film-forming auxiliary agent and the pH regulator, performing heating to 50-65 DEG C, performing constant-temperature stirring for 20-30 min, and performing natural cooling to room temperature to obtain the treatment agent. In practical application, when the treatment agent is prepared, the components are calculated and added according to an actual water volume of a boiler, and the addition amount is 10-20 g / t. Compared with the prior art,the treatment agent provided by the invention is applied to medium and high-pressure boiler water systems, overcomes various negative effects caused by the use of a phosphate, reduces the blowdown rate of the boiler, saves energy, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of boiler water treatment, and relates to a phosphorus-free boiler water treatment agent and its preparation and application. Background technique [0002] As we all know, the boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, and can also be converted into mechanical energy through a steam power device, or converted into electrical energy through a generator. However, in practical applications, under high temperature and high pressure environment, boiler water as an energy transfer medium, a small amount of colloid, calcium, iron and other impurities in the dissolved water are easy t...

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Problems solved by technology

However, this kind of reagent has certain disadvantages: it has high requirements on the system load, and when the system load increases, the phenomenon of "phosphate disappearing" will occur, which is actually caused by the deposition of insoluble phosphate on the furnace wall. Moreover, it will cause local free alkali to rise and cause alkali corrosion problems. At the same time, with the further improvement of environmental protection requirements, the discharge of phosphate has become a bottleneck problem in production and operation, which will cause great pressure on the environmental protection of enterprises.