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  • Two stage hot gas coal gasifier
  • Two stage hot gas coal gasifier
  • Two stage hot gas coal gasifier
  • Two stage hot gas coal gasifier
  • Two stage hot gas coal gasifier

Two Stage Hot Gas Coal Gasifier

Quantities can be customized

  • Introduction
  • Working Principle
  • Features
  • Parameter
  • Inquiry
Double stage coal gasifier(diameter 2m,2.4,2.6m,3.2m,3.4m,3.6m,4m,gas output from 2000Nm3/h to 14,000Nm3/h). Two-Stage Coal Gasifier is specially designed for the gasification of bituminous coal with higher gas heat value than that of single-stage coal gasifier and it has good environmental protection performance. Tar is removed from coal in the pyrolysis to form free flowing light oil, which can be recycled with extensive application.
Put the 40~60mm coal into the coal bin by the lifting equipment, and then the program controlled coal feeder charging the coal into the double stage gasifier . The air blower blowing the mixed air and steam as the gasification agent, from the air and steam mix chamber at the bottom of the gasifier.
The gasification agent reacted with 1200°Ctemperature semicoke at the gasifying section of the gasifier, and generated the combustible gas.The component of the gas is CO is about 31~33%, H2 is about 9~10%, CH4 is about 0.4%~0.5% meanwhile at the carbonize section of the gasifier, utilize the waste heat of the down stage gas make the carbonizing to generate CO is about 29~31%.H2 is about 17~19%, CH4 is about 1~3%, CnHm is about 0.2~0.4% combustible gas.The coal gas temperature of the carbonization section is around 100~150C, the gas flow through the electric detarrer to get rid of the dust and tar,and then flow into the gas main. The water and tar gathered from the bottom of the detarrer was sending to the tar tank.
The coal gas temperature of the gasifying section is around 550~600°C, flow through the cyclone dust catcher to removing the big granular dust, and then flow into the gas main.
The two stage gas was combined at the gas main, and its temperature is around 150~250C. The hot gas removing tar technology takes full advantage of the sensible heat of the gas.And it is a good choice for there is less demanding for the gas cleanness requirement.
 
1. It is with high and stable calorific, large elasticity of operation, high degree of automation, low labor strength.
2. Two-stage coal gasifier do not make environmental pollution, significantly saving water, covering small area, low cost for long term operation.
3. According to different customers’ requirements, we can use mechanical or hydraulic, with good permeability effect. It is suitable for bituminous coal gasification process.
Model (mm) CG3Q2.0 CG9Q2.4 CG3Q2.6 CG3Q3.0 CG3Q3.2 CG3Q3.4 CG3Q3.6 CG3Q4.0
Chamber diameter (m) 2.0 2.4 2.6 3.0 3.2 3.4 3.6 4.0
Chamber sectional area (m2) 3.14 4.52 5.35 7.07 8.04 9.08 10.18 12.57
Water jacket heated area (m2) 12.28 14.62 15.82 18.07 19.36 24.60 28.50 36.00
Suitable coal series Non-caking or weak-caking bituminous coal, coal property should comply with
the coal quality used in gas gasifier in GB-9143 ordinary pressure fixed bed.
Binding and Non-binding bitumite, old brown coal, partial gass coal.
Fuel granularity (mm) 20~40, 25~50, 30~60
Fuel consumption (kg/h) 840-920 920-1040 1350-1650 1800-2200 2000-2400 2200-2600 2400-2900 3200-4100
Air consumption quantity(m3/kg.coal) 2.0-2.5 2.0-2.5 2.0-2.5 2.0-2.5 2.0-2.5 2.0-2.5 2.0-2.5 2.0-2.5
Steam consumption quantity(m3/kg.coal) 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5
Gasifying agent Air ,steam Coal gasification is the process of producing coal gas, a type of syngas–
a mixture of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2) and water
vapour (H2O)–from coal and water. Coal gas, which is a combustible gas, was
traditionally used as a source of energy for municipal lighting and heat before the
advent of industrial-scale production of natural gas, while the hydrogen obtained
from gasification can be used for various purposes such as making ammonia,
powering a hydrogen economy, or upgrading fossil fuels.
Gas yield (Nm³/h) 2500-2800 3600-4200 4200-5200 6000-6500 6500-8000 7900-9500 9200-11500 11300-14500
Gas calorific value (Kj/Nm³)
Gas heat value(KJ/m3) upside
Gas heat value(KJ/m3) downside
7100-7500
5016-5643
Gas outlet pressure(KPa) upside
Gas outlet pressure(KPa) downside
<1
<1.5
<1
<1.5
<1
<1.5
<1
<1.5
<1
<1.5
<1
<1.5
<1
<1.5
<1
<1.5
Gas outlet temperature upside
Gas outlet temperature downside
100-150
500-600
100-150
500-600
100-150
500-600
100-150
500-600
100-150
500-600
100-150
500-600
100-150
500-600
100-150
500-600
Max hearth blast pressure (KPa) 5-6 5-6 5-6 5-6 5-6 5-6 5-6 5-6
Saturation temperature (℃) 50-65 50-65 50-65 50-65 50-65 50-65 50-65 50-65
Steam seal pressure of poking hole (KPa) <294 <294 <294 <294 <294 <294 <294 <294
Water jacket steam output(kg/h) 300 400 450 500 550 600 650 800
Water jacket steam pressure(MPa) <0.294 <0.294 <0.294 <0.294 <0.294 <0.294 <0.294 <0.294
Stoker driving device Hydraulic drive
Hydraulic drive power (kw) 7.5x2 7.5x2 7.5x2 11x2 11x2 11x2 15x2 18.5x2
Ash pan rotational speed (r/m) 2.97 2.97 1.5 1.5 1.5 1.5 1.2 1.2
Slag discharged form Wet-type, automatic discharging

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