Coal mine production + heating purchase 2 sets of 4 tons gas-fired steam boiler technical parameters

 Coal mine production needs steam, wellhead heating and office dormitory area heating in winter need heating. The project user unit plans to purchase two 4-ton gas fired steam boilers to meet production and heating needs. The following is an introduction to the technical parameters of gas boilers.

4 tons of gas-fired steam boiler technical parameters

Gas steam boiler technical parameter table
name	unit	value	Remark
Boiler rated evaporation	t/h	4
work pressure	MPa	1.25
Rated steam temperature	℃	≥190
Feed water temperature	℃	≥20
Radiation heating area	m	≥11
convection heating area	m	≥84
Tail heated area	m	≥21
boiler efficiency	%	≥91
Hydrostatic test pressure	MPa	1.65
water volume	m	≥5
adaptive fuel	/	light oil, natural gas
fuel low calorific value	MJ/Nm	≥35.438
fuel consumption	Nm /h	≤334
burning method	/	micro positive pressure chamber combustion
exhaust temperature	℃	≤135.75
Excess Air Coefficient at Smoke Exhaust	/	≥1.15
Stable operating range	%	80-100

Environmental protection requirements indicators (use of natural gas)

1) Smoke emission concentration: 0mg/m³;

2) SO2 emission concentration: 0mg/m³;

3) Nitrogen and oxygen emission concentration: 50mg/m³;

4) Single noise: ≤85 decibels.