All articles for this topic or copying prohibited uploaded to other sites

Keywords: furnace gas furnace gas composition of the dust, moisture H2S tar solids

The so-called furnace furnace out of gas, coal is gasified in the gas generated by the reaction furnace, gas furnace exit from exporting gas without purification. The combustible gas from a single gas components (CO, H2, CH4), gaseous alkanes (CmHn), H2S, incombustible gas composition (CO2, N2, O2) and tar vapor, dust and solid particles and water vapor formed.
1, gas composition and gas calorific value gas
Gasification of bituminous coal, coal with higher levels of CO, but also a small amount of CmHn, gas calorific value is also higher; gasification anthracite, CO and CH4 concentrations are low when compared to bituminous coal gasification, gas calorific value ie lower; when lignite gasification, CO content is low, but the H2 and CH4 is relatively higher, gas calorific value is higher, however, the gasification of lignite low yield of only 2Nm3/kg (coal) , while bituminous coal or anthracite gasification, gasification yield of 3 ~ 3.5 Nm3/kg (coal).

Table 1, when several coal gasification and gas calorific value of the gas composition

2 H2S in gas
How much gas in the H2S content of sulfur and how much coal gasification, generally sulfur coal for 80% of the state into H2S gas, 20% of the sulfur remains in the ash.
3, Tar in gas
The tar content in the gas is related to the proportion of volatile matter in the coal, When Anthracite is gasified, there is little tar in the gas, When gasification bituminous coal, the tar production in the gas is 2% to 6% of the coal consumption.
4, Moisture in gas
Gas in the water vapor from the undecomposed portion of the cryogenic distillation of coal pyrolysis of coal in water and water, in general, the gasification of bituminous coal, anthracite coal in the water about 0.06kg/Nm3, the gasification of lignite When the gas in the water is higher, up to 0.13 ~ 0.27kg/Nm3.
5, Solid particles of dust in gas
Solid particles of dust in the gas (i.e., with the object), it is the thermal stability of the coal into the furnace in the powder-containing lump rate, and the gasification furnace strength, particle size distribution of coal into the furnace, coal seam thickness and other factors For, in general, the gas in the amount of solid particles of dust coal into the furnace 4% by weight to 6%.

Table 2 type of coal gasification gas in the water, tar, dust, solids content