The device adopts a new fin structure technology with low thermal resistance and high heat transfer coefficient. The heat exchange efficiency is 20% higher than that of traditional equipment. The use of self-developed heat-insulated combustion chambers improves the utilization of coal and can save energy by more than 15%. In the high temperature zone, high temperature resistant special metal materials are used as liners, and the service life is more than double that of similar products. The device's heat output temperature reaches 300°C to 500°C, and the thermal efficiency is over 85%. At the same time, because the equipment uses coal, oil, gas, vegetation, straw, waste, etc. as fuel, the indirect heat exchange can directly output clean hot air, which can replace the current steam heat exchanger, heat transfer oil heat exchanger and electric heaters and other traditional model. It is understood that hot air furnaces are widely used as important drying equipment in the chemical, metallurgical and food industries.
1. Wear-resisting steel plate is composed of two parts: low carbon steel plate and alloy wear-resisting layer. The alloy wear-resisting layer is generally 1/3~1/2 of the total thickness. When working, the matrix provides comprehensive properties such as strength, toughness and plasticity to resist external forces, and the alloy wear layer provides the wear resistance to meet the requirements of specified working conditions.
2, wear-resisting steel plate alloy wear-resisting layer and substrate is metallurgical combination. Through special equipment, the use of automatic welding process, the high hardness self-protection alloy welding wire evenly welded on the substrate, composite layer number of one layer to two layers or even multilayer, composite process due to the alloy shrinkage ratio is different, uniform transverse crack, which is the remarkable characteristics of wear-resistant steel plate.
3, the gold wear-resistant layer is mainly chromium alloy, but also add manganese, molybdenum, niobium, nickel and other alloy components, metallographic structure in the carbide fiber distribution, fiber direction and surface vertical. The microhardness of carbide can reach HV1700-2000, and the surface hardness can reach HRC58-62. Alloy carbide has strong stability at high temperature, maintain high hardness, but also has good oxidation resistance, under 500℃ completely normal use.
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