... in printing,6. production: 30,000-80,000 per year7. fuel: natural gas, liquefied petroleum gas, gas8. skimming form: 2-lebel ... ), which is equivalent to the heat value of usual fuel oil and fuel gas and has higher value in use; Currently, the ... waste gas of color coating are: active carbon adsorption, thermal combustion method, catalyzer (accelerant) purification method etc; It has been proofed ...