All materials used in methanol production can be recycled exhaust
SINGAPORE Bloomberg, Dushanzi ethylene plant recovery of surplus low pressure methane, and carbon dioxide gas emissions analysis delivered to methanol plant as raw material, so that the production of materials used methanol plant is recycling all waste. April 27, according to the statistics, the monthly savings of more than 240 million cubic meters of natural gas (standard state, the same below), the monthly cost more than 250 million.
The annual output of 30,000 tons of ethylene plant methanol plant using natural gas low-pressure methanol synthesis process, due to tight supply of natural gas, methanol plant has been unable to reach full capacity, the device yield and low yield, high energy consumption. In 2009 with one million tons Dushanzi ethylene plant started production, there is a surplus situation ethylene plant exhaust, old liberated areas ethylene gas low-pressure methane and ethylene fuels no where; hydrogen plant transformation is put into use analytical gas emissions torch; old liberated ethylene plant alkali waste sent to New vinyl, the spent caustic oxidation unit outage, ethylene glycol unit surplus of carbon dioxide, into the atmosphere.
To reduce the losses caused by exhaust emissions, combined with methanol plant process characteristics, the plant built a recycling plant, running at full capacity, so that each year ethylene plant to reduce the surplus to the low pressure flare methane, fuel gas and analytical gas about 39.9 million cubic meters, while annual reduction of about 4.62 million cubic meters of carbon dioxide emissions.
Gas utilization project implementation and put into use, so that four shares of the ethylene plant tail gas recovery and utilization of the full, and the elimination of the methanol plant capacity due to inadequate gas supply device conflict, after the change of methanol feedstock, natural gas consumption to zero, a annual savings of 29.82 million cubic meters of natural gas, cost 31.31 million yuan each year, creating considerable economic benefits.
