Effects of Slurry Prepared by Adding Oily Sludge and Wastewater on GE Gasification Process

Gasification of slurry prepared by oily sludge and wastewater can effectively reduce pollutant emissions, lower environmental risks and achieve wastes recycling. The effects of oily sludge and wastewater on GE (General Electric Company) gasification process were discussed, and adverse effects of chlorine and ash on GE gasification process were analyzed and corresponding control measures were brought forward. The results showed that when the slurry fresh water is replaced entirely by electric desalting wastewater, RO (Reverse Osmosis) concentrated water and circulating water drainage, the Cl- content of coal-water-slurry will increase by 67.1%, 274.1% and 105.6% respectively, which results in reducing cycling water from ash wastewater treatment system, increasing the purification system load and raising up the corrosion hazard of equipment and pipelines; when adding 5% oil tank sediment, scum and waste activated sludge, the ash content will increase by 7.46%, 0.44% and 5.92% respectively, which aggravates the abrasion of devices and pipelines and easily leads to slag and clog in the gasifier furnace and the outlet.