潘文杰,樊盼盼,王洋,高艳春,樊晓婷,李翔宇,鲍卫仁,王建成
PAN Wenjie,FAN Panpan,WANG Yang,GAO Yanchun,FAN Xiaoting,LI Xiangyu,BAO Weiren,WANG Jiancheng

• 1:太原理工大学省部共建煤基能源清洁高效利用国家重点实验室
• 2:太原理工大学煤科学与技术教育部重点实验室
• 3:太原理工大学大气复合污染识别与控制山西省重点实验室
• 4:环境科学与工程学院

摘要(Abstract)：

煤气化过程中产生的气化渣的处置问题日趋严重。气化渣中的残余炭具有较发达的孔隙结构和较大的比表面积，具有制备活性炭和其他高附加值碳材料的潜质。通过水介重力分选方法得到高品质气化渣分离炭后，采用配煤法制备脱硫活性焦，可实现气化渣的高附加值利用。通过单因素试验法及正交试验法考察在气化渣分离炭高掺比条件下配煤种类、比例及炭化、活化工艺条件对脱硫活性焦结构和性能影响。研究表明，气化渣分离炭在掺入比例为50%时，活性焦的最佳配煤组成为：焦煤29%、长焰煤8%、煤沥青13%;最佳炭化条件为：升温速率5℃/min、炭化温度700℃、炭化时间30 min;最佳活化条件为：活化温度900℃、升温速率8℃/min、活化时间120 min、活化水量1.0 mL/(g·h)。利用固定床反应装置对气化渣基脱硫活性焦进行脱硫和再生性能评价，在最佳配方和工艺条件下，公斤级试验制备的脱硫活性焦耐磨强度为97.26%,耐压强度为696.3 N(实测值),灰分为11.66%,碘吸附值为378.78 mg/g,脱硫值为28.5 mg/g,满足脱硫用煤质颗粒活性炭指标A型优级品的技术指标且再生性能良好。以气化渣分离炭作为碳源制备脱硫活性焦在大幅降低活性焦生产成本的同时，也为气化渣的高值化利用提供了一条可行途径，对气化渣的减量化、资源化、高值化利用具有重要意义。
The problem of disposal of coal gasification slag produced in the coal gasification process is becoming increasingly serious. Residual carbon in the gasification slag developed pore structure and large specific surface area, which had the potential to prepare activated carbon and other high value-added carbon materials, and the full utilization of residual carbon could realize the sustainable use of carbon resources. After obtaining high quality separated carbon by water-mediated gravity separation, gasification residue-based desulfurization activated coke was prepared by coal blending method based on gasification residue separated carbon, which could realize the high value-added utilization of gasification residue. The effects of coal type, coal ratio, carbonization and activation process conditions on the structure and performance of desulfurization activated coke under the condition of high mixing ratio of gasification residue separated carbon was investigated by one-way and orthogonal experiments respectively. The study showed that the optimal coal composition of activated coke for gasification residue separated carbon at a blending ratio of 50% was 29% coking coal, 8% long-flame coal, and 13% coal pitch; The optimal carbonization conditions were as follows: heating rate of 5 ℃/min, carbonization temperature of 700 ℃ and carbonization time of 30 min; The optimal activation conditions were: activation temperature 900 ℃, heating rate 8 ℃/min, activation time 120 min, activated water volume 1.0 mL/(g·h). Evaluation of desulphurisation and regeneration performance of gasified slag-based desulphurisation activated coke using a fixed-bed reaction unit. Under the optimal formulation and process conditions, the desulfurization activated coke prepared in the kilogram experiments had an abrasion strength of 97.26%, a compressive strength of 696.3 N(measured value), an ash content of 11.66%, an iodine adsorption value of 378.78 mg/g, and a desulfurization value of 28.5 mg/g, which meet the requirements for desulfurization of coal particles. Technical specifications of A-type good grade of coal granular activated carbon for desulphurisation was satisfed and regeneration performance was good. The preparation of desulfurisation activated coke using gasification residue separated carbon as carbon source significantly reduces the production cost of activated coke, and at the same time provides a feasible way for the high value utilisation of gasification residue, which is of great significance for the reduction, resourcing and high value utilisation of gasification residue.

关键词(KeyWords)： 气化渣;脱硫活性炭/焦;配煤法;炭化;活化
gasification slag;desulfurization activated carbon/coke;coal blending method;carbonization;activation

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2022YFB101604)

作者(Author): 潘文杰,樊盼盼,王洋,高艳春,樊晓婷,李翔宇,鲍卫仁,王建成
PAN Wenjie,FAN Panpan,WANG Yang,GAO Yanchun,FAN Xiaoting,LI Xiangyu,BAO Weiren,WANG Jiancheng

DOI: 10.13226/j.issn.1006-6772.CPC24011101

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