Common ways of boiler renovation
Common ways of boiler renovation
1. Boiler flue gas waste heat recovery
The exhaust temperature of industrial boilers is generally high, above 180 ℃, which not only pollutes the environment but also wastes valuable flue gas waste heat resources. By using heat pipe heat exchange technology, this contaminated flue gas waste heat resource can be effectively recovered, which can be used to preheat boiler combustion air, preheat boiler feedwater, or directly generate hot water.
2. Repair of boiler coal conveying device
At present, all floor standing boilers use raw coal, and most of them are forward rotating chain grate boilers. On the grate, obstructing the intake of the boiler affects combustion. The bucket type coal feeding is converted into layered coal feeding, and the raw coal blocks and final coal are filtered through a gravity filter through a grate. From bottom to top. Promote air intake, improve combustion conditions, increase coal consumption, and achieve a coal saving rate of 5% to 20% based on the carbon content of the slag. According to the condition of the furnace before the renovation, the worse the energy-saving effect, the higher the effect. The project investment is small, the energy-saving effect is high, and the recycling speed is fast.
3. Boiler oxygen enriched combustion technology
Generally, if the flame temperature of the boiler is not sufficient, the carbon content of the coal slag is too high, the Ringman blackness of the flue gas cannot meet the standard, the combustion efficiency of the boiler is not high, and the power output of the boiler is insufficient, you can consider using oxygen rich combustion technology to increase the oxygen content of the combustion air and make the fuel combustion more complete. Reduce air coefficient, exhaust gas emissions after combustion, increase flame temperature, reduce exhaust blackness, save energy by 5% to 15%, and increase boiler output by more than 10%. The energy-saving and environmental protection advantages of oxygen enriched combustion technology are very good, with a project investment payback period of less than one year.
4. Internal renovation and adjustment of boilers
In most cases, coal-fired boilers are purchased for a short period of time and have a relatively long service life, so each configuration can support boiler operation. Gas conversion, biomass conversion, electricity conversion, fuel conversion, etc. only require the replacement of individual boiler configurations, and only the boiler body and some configurations need to be retained, which is relatively convenient.