Coal-fired boilers and gas-fired boilers
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Under the same process conditions, in 2017 a 6T coal-fired boiler was used with a daily gas consumption of 42T, while in 2018 a 6T gas-fired boiler was used with a daily gas consumption of 52T
I don’t understand what you mean. Are you saying that the steam produced by coal-fired boilers is better than that produced by gas-fired boilers?
Yes, in 2017 the same products were manufactured using the same processes and equipment, with a daily steam consumption of around 42 T (on average). In 2018, gas boilers were installed, and the daily steam consumption increased to 52 T. Could everyone help analyze the reasons for this?
Yes, in 2017 the same products were manufactured using the same processes and equipment, with a daily steam consumption of around 42 T (on average). In 2018, gas boilers were installed, and the daily steam consumption increased to 52 T. Could you help analyze the reasons for this?
Are the steam pressure and steam temperature the same?
First, I need to ask how you measured this amount of steam Is it the same flow meter? If the flow rate is fine, are the steam parameters consistent? What does this have to do with what fuel the furnace uses? If you say that the fuel cost incurred varies, then that is what distinguishes one boiler from another; it’s a matter of boiler efficiency.
I would like to ask how much more the cost is after the replacement
If the amount of steam used increases while the production volume remains unchanged, it indicates that the efficiency of steam heat exchange has decreased or there is a leak in the steam system. It is necessary to check the operation of the steam traps in the system; failure to remove condensate in a timely manner can lead to reduced heat exchange efficiency, and in such cases, the traps may need to be replaced.
I would like to ask everyone again: under the same steam flow rate, if the delivery pressure is different, will the heat energy also be different?
The difference in enthalpy of saturated steam at those different pressures is quite large
For comparison, the cost of consumption can be calculated and then used for comparison; for example, what is the cost of producing one unit of steam with a coal-fired boiler under the same conditions, and what is the cost of producing one unit of steam with a gas-fired boiler?