Fire-resistant and wear-resistant coating for circulating fluidized bed boiler and preparation method thereof

Abstract

The invention relates to anti-abrasion paint, in particular to an anti-abrasion fireproof paint for a circulating fluidized bed boiler and a preparation method of the anti-abrasion fireproof paint. The anti-abrasion fireproof paint comprises a binding agent and a powder material; the binding agent is prepared from, by weight, 52-57 parts of SiO2, 40-42 parts of K2O and 4-5 parts of Na2O; the powder material is prepared from, by weight, 53-58 parts of Al2O3, 36-40 parts of SiO2, 1.5-1.8 parts of Fe2O3, 1.6-1.9 parts of CaO, 1.3-1.7 parts of K2O, 1.3-1.7 parts of Na2O, 1.3-1.7 parts of TiO2 and 1.3-1.7 parts of ZrO2. The anti-abrasion fireproof paint can be cured naturally at a normal temperature, can be sintered at a high furnace temperature to form a ceramic with a compact, smooth and hard surface and is excellent in high-temperature abrasion resistance and high sulfur corrosion resistance. In addition, the anti-abrasion fireproof paint is free of scaling, blistering and shedding at a high temperature and extremely excellent in performance of bonding to substrate surfaces and thermal shock resistance.

Description

technical field [0001] The invention relates to an anti-wear coating, in particular to a refractory anti-wear coating for a circulating fluidized bed boiler and a preparation method thereof. Background technique [0002] In recent years, circulating fluidized bed boilers have been widely used in power generation and heating companies due to their environmental protection, energy saving, and high efficiency characteristics. The serious wear and tear of the "pipe" has led to frequent accidents such as tube explosion and shutdown, which have caused great losses to the production and safety of the enterprise. At present, the anti-wear measures for the "four tubes" of fluidized bed boilers are mainly supersonic arc spraying, mechanism welding and other technologies, but these technologies generally have disadvantages such as numerous construction equipment, complicated processes, high cost, and long construction period, such as arc spraying Only about 25 square meters can be con...

AI Technical Summary

Problems solved by technology

[0002] In recent years, circulating fluidized bed boilers have been widely used in power generation and heating companies due to their environmental protection, energy saving, and high efficiency characteristics. The severe wear and tear of the "pipe", resulting in frequent accidents such as tube explosion and shutdown, which caused great losses to the production and safety of the enterprise

At present, the anti-wear measures for the "four tubes" of fluidized bed boilers are mainly supersonic arc spraying, mechanism welding and other technologies, but these technologies generally have disadvantages such as numerous construction equipment, complicated processes, high cost, and long construction period, such as arc spraying Only about 25 square meters can be constructed a day, and the cost per square meter is about 1,300 yuan, while each equipment for metal deposition can only construct about 2 square meters per day, and the cost is as high as 7,000 yuan per square meter, which is obviously in line with the requirements of thermal power production. It cannot adapt to the characteristics of short maintenance period and low cost of the boiler

Images