Economic analysis of coal-fired boilers and gas-fired boilers
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Which expert knows the operating costs of 4-ton coal-fired boilers and gas boilers? That is, the same air pressure is generated per hour; how much gas and coal are required? This post was last edited by bobo315 on 2009-3-2 12:36.]
It depends on what price you can get for coal and what price gas is at. If coal costs 900 yuan per ton and gas costs 2 yuan per cubic meter, the costs are roughly the same. Slightly higher pressure
Thank you for your advice. Is there a specific formula for this?
It is directly related to the calorific value of coal and gas, as well as to the efficiency of the boiler! Generally speaking, coal-fired boilers are definitely more economical than gas-fired boilers
Agree with the fourth floor. This is related to the prices of coal and gas, their calorific value, and the thermal efficiency of the boilers. If we really consider it, there are also the transportation and storage of coal, as well as the setup fees for natural gas. However, coal is definitely cheaper than natural gas. If local environmental regulations permit it, coal is still used the most.
The thermal efficiency of coal furnaces is generally quite low, around 70%. In contrast, gas-fired steam boilers have a thermal efficiency of over 85%. For example, the heat required by a 4T boiler is 2,400,000 kcal. The calorific value of coal is 5,000 kcal/kg, while that of natural gas is 8,600 kcal/Nm3. The amount of coal needed is: (2,400,000/70%)/5,000 = 685.7 kg/h. For natural gas, the required amount is: (2,400,000/85%)/8,600 = 328.3 Nm3/h. Other factors to consider include the electricity consumption of fans used for drawing in air and blowing it out, as well as equipment used for feeding coal; labor costs, transportation costs for coal, space requirements, environmental factors, and equipment maintenance costs. When using natural gas, the motor power of the burner for a 4T boiler is 11 kW, so only one person is needed per shift. There are basically no maintenance costs for the burner, aside from cleaning dust from the air intake and the natural gas filter. Using natural gas also results in a more environmentally friendly operation. Another consideration is the cost associated with setting up natural gas pipelines. All of these can be compared by calculating them at local prices