Most people will choose to coal fired boiler prices south africa "from coal to gas," This is mainly because natural gas has the advantage of this type of energy significant environmental characteristics and higher clean energy. However, the road from coal to gas boiler was not always smooth, many users are using coal-fired boilers, the face of high "coal to gas" and post-investment costs are very hesitant.
Through estimation: If the exhaust gas temperature of 150 ℃, when the excess air ratio from 1.5 to 3.0 cases, the combustion is generally bituminous coal, anthracite coal fired boiler prices south africas, heat losses from about 5% to 10%, reducing the thermal efficiency of the boiler nearly 5 percentage points. While the chain grate boiler excess air ratio was mainly due to leakage caused by the grate, but also accounted for a large proportion of the furnace leakage, strict plugging wind, to improve boiler thermal efficiency, reduce coal consumption, save energy resources it is very significant. Before plugging the wind, the first thing leakage test boiler.
Personnel and to avoid faulty gas coal fired boiler prices south africa gas boiler prone to some fault in the use of the process in order to avoid it fails, we have to understand some of the considerations when using. When using a gas boiler, we should always carry out its care and maintenance of local failure timely maintenance and replacement, make sure it is working properly. Circulation pump pressure constant, the current increases and the flow drops, deterioration of the thermally conductive fluid, the viscosity increased, should be replaced or regenerated. New heat transfer fluid as a result of decomposition of aqueous or excluded gases in the system, should immediately open the vent valve of the exhaust gas. When the current is lower than normal circulation pump, the circulation pump efficiency is decreased, the flow rate decline may be heating pipes plug fouling, and should be cleaned. Low temperature liquid phase heat carrier outlet of the furnace, for lack of heat, and the exhaust gas temperature exceeds 300 ℃, the main problem is the fouling, soot blowing should be. As low exhaust gas temperature, the main issue is burning, mainly lack of the wind. Although the pressure furnace, the blast volume is not open, the furnace temperature is low, combustion insufficient strength. We should focus on rear seal machine check furnace slag, dust, etc. whether closing the ash outlet is good, with or without cold air leakage into large. Before and after the filter differential pressure increases, the pump inlet pressure drops, the filter may be stuck, the opening of the bypass, disassemble and clean the filter. Grate stuck. The reason is often broken or grate grate fall loose pins; coal grate has stuck to metallic inclusions; arched grate; slag filter (Eagles iron) sink tip and the grate stuck. Processing method: reverse hand grate plate debris removal, replacement breaking grate after the start, then jammed as startup, stop the rotation of the reasons detailed inspection to resolve. The iron eagle sink, both sides can pull the fire door pull hook n. Grate stop turning, it may be too loose chain, and sprocket meshing well, or badly worn sprocket, and chain-linked bad; the adjustment screws on both sides to re-adjust the tension grate, if still does not work, you need to exchange sprocket.
In mid-June this year, Hebei Province issued a notice regarding the development of gas-fired coal fired boiler prices south africa nitrogen oxides (referred to as NOx) governance, in order to further deepen the boiler pollution control, reduction of nitrogen oxide emissions, improving air quality, will gradually nitrogen oxides exceeded boiler discharged for investigation and control work, high nitrogen oxide emissions from the original (150mg / Nm3 or above) is reduced to 30mg / Nm3. City, Hebei Province is located in the Yili Dairy Co., Ltd. to respond positively to governance EPA gas boiler NOx reduction, and led the way, three of the company's existing 15 steam tons / hour (t / h) gas steam boilers for low-nitrogen emissions transformation.