Poly-light heat-preservation plastic concrete for energy conservation of gasification furnace and power boiler, and production process thereof

Abstract

The invention relates to poly-light heat-preservation plastic concrete for energy conservation of a gasification furnace and a power boiler. The poly-light heat-preservation plastic concrete comprisesthe following raw materials in percentage by weight: 20-35% of expandable polystyrene spheres, 5-10% of perlite, 30-35% of fly ash, 5-15% of floating bead powder, 10-20% of an expanding agent, and 15-25% of a binder, wherein the raw materials are used as basic raw materials. The poly-light heat-preservation plastic concrete further comprises, on the basis of the total amount of the basic raw materials, 0.1%-0.15% of engineering fibers, 0.15%-0.2% of a water reducing agent, 0.5%-1% of an ageing agent and 0.1%-0.15% of a curing agent. The poly-light heat-preservation plastic concrete has the advantages of being high in compression strength, low in heat conductivity coefficient, low in heating permanent linear change rate and the like, and the performances of related products of the poly-light heat-preservation plastic concrete reach the national standard and are remarkably superior to the performances of similar products, wherein a volume density is 400-600 kg/m<3>, a heat conductivitycoefficient (350 DEG C) is 0.075-0.10 W/(m.K), compression strength is 1.2-1.8 MPa (110 DEG C * 24 h) and 1.1-1.5 MPa (800 DEG C * 3 h), and a heating permanent linear change (700 DEG C * 3 h) is +/-1.0%.

Description

technical field [0001] The invention relates to a polylight heat-insulating plastic concrete for energy saving of gasifiers and power station boilers and a production process thereof, belonging to the technical field of refractory materials. Background technique [0002] Gasifier, also known as coal-to-gas CFB circulating fluidized bed gasifier, is one of the key large-scale equipment for coal-to-gas gasification plants in the coal chemical industry. Power plant boilers, or CFB circulating fluidized bed boilers in power plants, refer to medium and large boilers in power plants that provide a specified quantity and quality of steam to steam turbines, and are one of the main thermal equipment in thermal power plants. The refractory materials in gasifiers and power station boilers play the role of heat insulation, energy saving, wear resistance and fire resistance. The quality of the refractory materials determines the safety, stability and service life of the entire system dev...

AI Technical Summary

Problems solved by technology

[0003] Due to the large volume of gasification furnaces and power plant boilers, the height generally reaches tens of meters. In addition to refractory bricks for the inner wall and top of the boiler, poly-light heat-preserving plastic concrete is also used when building bricks. The inner wall of the whole boiler is formed and dried. It is used after curing. Due to the burning of the refractory layer during the working process of the boiler, periodic replacement and rebuilding are required. However, the local burning of the refractory layer often leads to overall rebuilding, resulting in increased costs. One is the abnormal burning of local refractory bricks. , the other is due to the burning loss of the refractory layer formed by poly light heat insulation plastic concrete

However, at present, the compressive strength of poly-light insulation plastic concrete used in medium and low-temperature thermal equipment such as gasifiers and power plant boilers is low, resulting in a short service life and requiring frequent repairs or replacements, which affects the normal operation of the boiler and consumes a lot of energy. Manpower and financial resources, and the temperature of the outer wall of the equipment is relatively high, even reaching above 150°C, the energy consumption is relatively large, and the working environment is harsh

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