The burning circle in the furnace is unreasonable, the aerodynamic field is poor, the flame is unevenly distributed in the combustion chamber, and the furnace wall is washed away, causing the furnace interior temperature to be high. The furnace bottom pipe and the bottom steel girder etc. have long-term corrosion under high temperature conditions, and the strength of the metal after thermal fatigue is greatly reduced. The technical energy-saving measures to reduce fuel chemistry and smoke loss have been replaced by hand-fired furnaces. The chemical loss of the fuel is limited by the type of furnace, mainly due to the chemical losses of fly ash and leakage coal. The main factors affecting this are the furnace level and the furnace. Row form and whether there is a secondary wind. Therefore, 1) improve the boiler operator's operating level; (2) choose a suitable grate, not only to reduce the leakage of coal without making the grate resistance is too large; (3) increase the secondary air, so that combustibles and air are fully mixed, reduce the gas , Incomplete combustion of solid heat loss. To reduce this part of the loss, an air preheater can be used to increase the air entering the furnace and the air temperature into the paint box.
Because the top of the furnace is a reinforced concrete structure, the use of fire-retardant fiber insulation as the insulation layer causes the average temperature of most furnace tops in the high-temperature stage to increase, and the heat storage increases. The internal rebar inside the furnace is heavily oxidized, shortening the service life of the furnace top. On the basis of a significant improvement in heating quality, the heating capacity of the heating furnace has been increased, and its fuel consumption has achieved a fuel consumption of 33 kg per ton of steel, setting a record high. In general, the corrosion resistance of stainless steel is better, followed by cast iron and carbon steel. Conductive parts are generally copper and aluminum. Copper has better chemical stability than aluminum, and it can also produce an oxide protective film on the surface to prevent corrosion. However, copper is extremely susceptible to corrosion in the environment of acetylene and ammonia, and aluminum is in these environments compared with copper. It has its unique corrosion resistance.
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