What Is a Gas Forge?

Gas furnace is an ideal secondary energy equipment for various heating furnaces and industrial kilns in machinery, metallurgy, chemical industry, light industry, building materials, glass and other industries.

Single-stage gas stove	Two-stage gas stove
Single gasification	Gasification and carbonization
Low gasification efficiency and low thermal efficiency	Gasification efficiency is relatively high, thermal efficiency is 3-5% higher than single stage
Low gasification intensity	Higher gasification intensity, 5% higher than single stage
Widely used coal, anthracite, coke, weak sticky coal, lignite	The scope of application of coal is small, old brown coal, young bituminous coal and weak sticky coal
Producing a calorific value gas	Production of two calorific value gas
High operating requirements and large fluctuations in furnace conditions	Stable furnace condition, not easy to cause burn-through and partial furnace
High temperature cracking produces heavy tar containing asphaltenes	Low viscosity tar produced by low-temperature carbonization
When producing cold gas, the phenol content in the washing water is large and the treatment is complicated	In the production of cold gas, if the lower stage gas is rapidly cooled, the washing water has a low phenol content and is easy to handle. The amount of condensate is small and easy to handle.
The requirements for entering the coal are not as strict as those of the two-stage gas generator	Strict requirements for entering coal, lower limit rate 10%
Less investment	Higher investment
Large footprint	Small footprint

Single-stage gas generator, also known as one-stage gas generator or single-stage gas generator, has the characteristics of large gas production, complete gasification, strong adaptability to coal types, high calorific value of gas, easy operation and high safety performance. The prominent problem of single-stage gas stove is:

The types of coal for gas stoves are: long-flame coal, non-sticky coal, weakly sticky coal, 1/2 medium sticky coal, gas coal, 1/3 coking coal, lean coal and anthracite.

The quality of coal for gas stoves must meet the following requirements:

Item		skills requirement	experiment method
grain degree Minute level	bituminous coal	13 ~ 25, 25 ~ 50 mm 50 ~ 100, 25 ~ 80 mm	GB189
	anthracite	6 ~ 13, 13 ~ 25 mm 25 ~ 50mm	MTI
Lump coal lower limit rate		50 ~ 100mm granularity 15%;	MTI
		25 ~ 50mm granularity level 18%;
		25 ~ 80mm granularity level 18%;
Rate		Level <2.0%	GB 212
		Level 2.0 ~ 3.0%
Ash content (dry basis)		Level 1 18%	GB 214
		Level 2> 18 ~ 24%
Total sulfur (dry basis)		2%	GB 219
Softening temperature of coal ash (ST)		ST1150 at ash (dry basis) 18%
		When ash (dry basis)> 18 ~ 20%, ST1250
Thermal stability (ST + 6)		> 60%	GB 1573
Breaking strength (> 25mm)		> 60%	GB 7561
Colloidal layer thickness (Y)		Generator without stirring device, Y <12mm	GB 479
		Generator has stirring device, Y <16mm
Calorific value (application base low)		Anthracite> 23MJ / kg (> 5500 kcal / kg)	GB 213
		Bituminous coal> 21MJ / kg (> 5000 kcal / kg)