Boiler chromium-based decoking and coal saving agent composition and preparation method thereof

Abstract

The invention relates to a coal additive for coal-fried boilers in industries such as electricity generation, thermoelectricity, petroleum, chemical industry, metallurgy and the like and particularly relates to a boiler chromium-based decoking and coal saving agent composition, which is prepared from the following components in parts by weight: 65-80 parts of chromium oxide, 12-20 parts of copper sulfate, 8-13 parts of cerium oxide, 8-13 parts of vanadium pentoxide, 10-16 parts of manganese dioxide, 12-18 parts of potassium permanganate, 6-11 parts of potassium chlorate, 15-22 parts of zinc oxide, 10-15 parts of potassium molybdate, 8-13 parts of cobalt carbonate, 9-15 parts of barium carbonate, 30-40 parts of sodium carbonate, 6-10 parts of ferric trichloride, 40-55 parts of active white attapulgite clay and 0.1-0.3 part of a penetrant JFC. By using the boiler chromium-based decoking and coal saving agent composition, the problems of boiler coking and dust deposition, which are not solved for a long time, of the coal-fried boilers, are solved, the coal saving rate is larger than 4%, the problem that boiler parts are corroded by acidic substances is solved, the service life of a boiler is prolonged, and the atmospheric environment pollution is reduced. The boiler chromium-based decoking and coal saving agent composition is also suitable for deslagging of the coal-fried boilers.

Description

technical field [0001] The invention relates to a coal-fired additive suitable for coal-fired boilers in industries such as power generation, thermoelectricity, petroleum, chemical industry and metallurgy, in particular a boiler chromium-based decoking and coal-saving agent composition. The invention also relates to boiler chromium A preparation method of a coke-removing and coal-saving agent composition. Background technique [0002] 1. Boiler slagging and coking harm to the boiler [0003] According to statistics, my country now has about 500,000 boilers, and the types of coal used in boilers are complex, the origin is wide, and the quality is different. The problem of coking and slagging of boilers has become a major difficulty that plagues the normal operation of boilers. Slagging brings the following hazards to the boiler: [0004] (1) Due to the coking and slagging body thermal conductivity of the boiler heating surface is very small, only 1 / 400 of the metal on the he...

AI Technical Summary

Problems solved by technology

[0005] (2) Coking reduces the cross-sectional area of ​​the flue gas flow, increases the flow resistance, and significantly increases the positive pressure of the furnace

The data show that sulfur is easy to react directly with carbon steel at 300-400°C to form ferrous sulfate, forming high-temperature corrosion. Above 450°C, its damage to the furnace tube is more serious, and ferric sulfate is acidic and easy to absorb moisture. , after the furnace is shut down to cool down, it begins to absorb moisture and deliquescence, forming a strongly acidic corrosive environment on the heating surface, causing the heating surface to be damaged by dilute acid corrosion during shutdown

[0007] (4) Coking and slagging cause incomplete combustion of coal in the boiler, and CO, SO 2 Elevated content, serious pollution to the environment

[0008] (5) Serious slagging and coking will eventually lead to the shutdown of the boiler and manual cleaning of coke. Manual cleaning of coke requires not only sufficient parking time, but also frequent burn and scald accidents, which pose a serious threat to safe production

[0010] 2. Mechanism of coking and slagging on boiler heating surface

[0019] At present, as our country does not have enough financial resources to renovate the boilers, and the coal types cannot meet all the standards, only chemical methods can be used to solve this problem.