Shell粉煤氣化工藝激冷循環(huán)氣系統(tǒng)抗腐蝕改進
作者/來源：項愛娟，劉品濤(河南煤業(yè)化工集團中原大化公司 濮陽 457004)化肥工業(yè) 日期： 2014-12-15 點擊率：1624
摘 要：介紹和分析了Shell粉煤氣化工藝在生產(chǎn)實際應用中激冷循環(huán)氣系統(tǒng)存在的腐蝕問題及其對裝置高負荷長周期穩(wěn)定運行的影響情況。提出了解決腐蝕問題的改進措施，即：增設旁路提高操作溫度，避免在接近露點溫度下運行；在管線上增設伴熱管；增加停車處理的吹掃次數(shù)并延長吹掃時間，以排盡系統(tǒng)內(nèi)的積水；氣水分離器的除霧器絲網(wǎng)材質(zhì)改為Incoloy825等。實際運行結果證明改進效果明顯。
關鍵詞：Shell粉煤氣化；激冷循環(huán)氣；抗腐蝕；改進
Improvement on Corrosion Resistance of Chilled Circulation Gas System in Shell Pulverized Coal Gasification Process
Xiang Aijuan，Liu Pintao
(Zhongyuan Dahua Co.，Ltd.of He′nan Coal Chemical Industry Group Co.，Ltd. Puyang 457004)
Abstract：A presentation and an analysis are given in actual production by the Shell pulverized coal gasification process with relation to the corrosion problem in the chilled circulation gas system and its effect on the unit under high-load stable operation for a long period.Improvement measures are proposed for solving the corrosion problem，i.e.，the addition of a bypass to raise the working temperature，so as to prevent operation near the dew point；the addition of a steam tracing to the pipeline；the increase in sweeping times and sweeping length of time for shut-down treatment，so as to empty the water accumulated in the system；the change of the wire mesh material of the demister in the gas-water separator to Incoloy825.The actual operation results show that the effect of improvement is remarkable.
Key words：Shell pulverized coal gasification；chilled circulation gas；cor....
