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Coal using standard for ordinary pressure fixed bed gasifier


Project

Technical Requirements

Test Method

Size grading

Soft coal: 13-25.25-50.50-100.25-80mm

Blind coal: 6-13.13-25.25-50mm

GB189

The undersize fraction of the lump coal

25-100mm particle size fraction≤15%

25-50mm particle size fraction≤18%

25-80mm particle size fraction≤18%

MT-1

Refuse content

Class A<2.0%

Class B 2.0-3.0%

MT-1

Ash content (dry basis)

Class A≤18%

Class B>18.0-24.0%

GB212

Total sulfur (dry basis)

≤2.0%

GB214

Coal softening humidity(ST)

ST ≥1250℃,but when the ash content (dry basis) is less than or equal to 18.0%, ST≥1150℃.

GB219

Thermostability(ST+6)

  

   >60.0%

GB1573

Crushing strength(>25mm)

   >60.0%

GB7561

Glue layer thickness(Y)

Furnace without stirring apparatus Y <12mm

Furnace without stirring apparatus Y <16mm

GB479

Calorific value (application of the basal position)

Blind coal:  Q>23.0MJ/kg

Soft coal: Q>21.0MJ/kg

GB213


In the table, GB is a national unit and MT is the standard of the Ministry of Coal.