soot, smoke, and carbon monoxide) while too much results in heat lost due to the increased flue gas flowthus lowering the overall boiler fuel-to-steam efficiency. The table relates stack readings to boiler performance. Steam Motors Compressed Air Flue Gas Analyzers The percentage of oxygen in the flue gas can be measured by inexpensive gas-absorbing test
Improve Your Boilers Combustion Efficiency
Under the rated load conditions, the proposed flow rate in the smoke duct of a small gas boiler is as follows: 1. The smoke duct with larger flow resistance, take a smaller value. 2. For a long horizontal flue, to prevent ash accumulation, the speed of smoke under rated load should not be less than 7-8m/s. 3. When the ash content of fuel is high, in order to prevent wear, the speed of smoke should not be
Natural gas boilers operate at lower excess air (O2) and a different airflow requirement for stoichiometric combustion. Coal fired boilers normally operate with 3-3.5% O2 (about 20% excess air). Whereas natural gas boilers normally operate at 1-1.5% O2 (about 7% excess air).? Steam and exit gas temperatures. Upon switching from coal to natural gas, heat transfer characteristics of a boiler will be impacted.
How Much Gas Does Your Boiler Consume? | 128 Plumbing
combustibles (fuel, soot, smoke, and carbon monoxide), while too much results in heat lost due to the increased flue gas flowthus lowering the overall boiler fuel-to-steam efficiency. The table relates stack readings to boiler performance. On well-designed natural gas
Dec 08, 2015 · The most commonly found causes of restricted flue gas passages are soot and rust. To prevent damage from temporary conditions we have installed a flame roll-out switch to shutoff the TES unit when the heat build-up indicates a roll-out condition.
Aug 22, 2019 · Common causes of a boiler overheating include: Build-up of limescale; Blockage in the system; Fault with the pump; Thermistor issue; Now lets take a look at each of these causes in more detail. Build-up of limescale. Limescale build-up on the heat exchanger can restrict the flow of water and lead to your boiler overheating.