One Question per Day (February 13, 2018)
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What are the grade requirements for total sulfur in coal used for atmospheric pressure fixed-bed gasification? The standard in the 2001 version required ≤1% when a gas desulfurization device was installed; in the 2008 version, ≤0.5% was classified as Grade I, >0.5–1.0 as Grade II, and >1.0–1.5 as Grade III
1 Categories of coal used in atmospheric-pressure fixed-bed gas generators: non-caking bituminous coal and anthracite. 2. The quality of coal used in atmospheric-pressure fixed gas generators must meet the following requirements:
Item | Technical Requirements | Testing Method
---|---|---
Particle size distribution | Bituminous coal: 25–50 mm; Anthracite: 13–25 mm, 25–50 mm | GB189
Minimum proportion of lump coal | Particle size range of 25–50 mm: ≤18%; Particle size range of 25–80 mm: ≤18% | MTI
Ash content | Grade 1: <2.0%; Grade 2: 2.0–3.0% | MTI
Ash content (on a dry basis) | Grade 1: ≤18.0%; Grade 2: >18%–24% | GB212
Total sulfur content (on a dry basis) | ≤2% | GB214
Ash softening temperature (ST) | When ash content (on a dry basis) ≤18%, ST ≥1150°C; when ash content is 18–20%, ST ≥1250°C | GB219
Thermal stability (ST+6) | >60% | GB1573
Crushing strength (>25 mm) | >60% | GB1573
Lignin layer thickness (Y) | Y < 12 mm | GB7561
Calorific value (on a lower heating value basis) | Anthracite: >6500 kcal/kg ； Bituminous coal > 6000 kcal/kg GB213
Item | Technical Requirements | Testing Method
---|---|---
Particle size distribution | Bituminous coal: 25–50 mm; Anthracite: 13–25 mm, 25–50 mm | GB189
Minimum proportion of lump coal | Particle size range of 25–50 mm: ≤18%; Particle size range of 25–80 mm: ≤18% | MTI
Ash content | Grade 1: <2.0%; Grade 2: 2.0–3.0% | MTI
Ash content (on a dry basis) | Grade 1: ≤18.0%; Grade 2: >18%–24% | GB212
Total sulfur content (on a dry basis) | ≤2% | GB214
Ash softening temperature (ST) | When ash content (on a dry basis) ≤18%, ST ≥1150°C; when ash content is 18–20%, ST ≥1250°C | GB219
Thermal stability (ST+6) | >60% | GB1573
Crushing strength (>25 mm) | >60% | GB1573
Lignin layer thickness (Y) | Y < 12 mm | GB7561
Calorific value (on a lower heating value basis) | Anthracite: >6500 kcal/kg ； Bituminous coal > 6000 kcal/kg GB213
Total sulfur of 0.5 or less is classified as grade one； Greater than 0, 5-1 is grade two ； Greater than 1-1.5 is grade 3.
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed. In the 2008 version, ≤0.5% corresponds to Grade I, >0.5–1.0 corresponds to Grade II, and >1.0–1.5 corresponds to Grade III.
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed; in the 2008 version, ≤0.5% was classified as Grade I, >0.5–1.0 as Grade II, and >1.0–1.5 as Grade III
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed. In the 2008 version, ≤0.5% corresponds to Grade I, >0.5–1.0 corresponds to Grade II, and >1.0–1.5 corresponds to Grade III.
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed; in the 2008 version, ≤0.5% was classified as Grade I, >0.5–1.0 as Grade II, and >1.0–1.5 as Grade III
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed; in the 2008 version, ≤0.5% was classified as Grade I, >0.5–1.0 as Grade II, and >1.0–1.5 as Grade III
The standard in the 2001 version required ≤1% when a gas desulfurization device was installed. In the 2008 version, ≤0.5% corresponds to Grade I, >0.5–1.0 corresponds to Grade II, and >1.0–1.5 corresponds to Grade III.
Total sulfur of 0.5 or less is classified as grade one； Greater than 0, 5-1 is grade two ； Greater than 1-1.5 is grade 3.