The raw coal contains 4.95% sulfur and 0.023% chlorine, and is used for gasification
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The raw coal contains 4.95% sulfur and 0.023% chlorine; it is used for gasification. What considerations should be taken into account when selecting materials for the system?
High sulfur content and high chlorine levels are the most troublesome issues in gasification. High sulfur content tends to lower the pH of the ash water; in addition to causing corrosion, it also reduces the solubility of silica gel. Excess amounts of silica gel can cause the ash water in the sedimentation tank to turn white, and single-component cationic polyacrylamide has a poor effect on the flocculation and sedimentation of silica gel. The consequence of high chloride levels is an increase in chloride ions in graywater and blackwater. The temperature in graywater systems can reach up to 300 degrees. Such high temperatures, combined with highly polarized chloride ions, increase corrosion in the system, especially in stainless steel materials. To reduce chlorides in the graywater system, the best approach is to increase wastewater discharge. I look forward to the emergence of good technologies!