化工进展 ›› 2021, Vol. 40 ›› Issue (4): 2138-2144.DOI: 10.16085/j.issn.1000-66113.2020-1026
收稿日期:
2020-06-18
出版日期:
2021-04-05
发布日期:
2021-04-14
通讯作者:
樊俊杰
作者简介:
邓加晓(1994—),女,硕士研究生,研究方向为洁净煤技术。E-mail:基金资助:
DENG Jiaxiao(), FAN Junjie(), ZHANG Bei, REN Zhiyuan
Received:
2020-06-18
Online:
2021-04-05
Published:
2021-04-14
Contact:
FAN Junjie
摘要:
采用立式管式炉对淖毛湖原煤和洗煤进行热解,利用电感耦合等离子体-原子发射光谱(ICP-AES)、X射线衍射(XRD)等检测手段研究了淖毛湖煤在不同热解温度下碱金属钠的析出特性及不同赋存形态之间的迁移转化规律。结果表明:乙酸铵洗煤和盐酸洗煤的不溶钠在热解过程中会向乙酸铵溶钠和酸溶钠转化,其中钠的挥发性呈现增加的趋势,释放量在3%~24%;而水洗煤在热解过程中钠会从水溶态、乙酸铵溶态和酸溶态向不溶态和气相迁移转化。原煤中钠主要以水溶态为主,在热解过程中水溶钠会向其他形态转化,其中钠的挥发性先减少后增加,在600℃达到最低。低温下钠的挥发来自乙酸铵溶钠的分解,高温下水溶钠和酸溶钠会进入气相,使得原煤和洗煤在800℃时钠的挥发速率增加。
中图分类号:
邓加晓, 樊俊杰, 张蓓, 任志远. 淖毛湖煤在热解过程中钠的迁移转化规律[J]. 化工进展, 2021, 40(4): 2138-2144.
DENG Jiaxiao, FAN Junjie, ZHANG Bei, REN Zhiyuan. Migration and transformation of sodium in the pyrolysis of Naomaohu coal[J]. Chemical Industry and Engineering Progress, 2021, 40(4): 2138-2144.
工业分析 | 元素分析 | ||||||||
---|---|---|---|---|---|---|---|---|---|
Mad | Aad | Vad | FCad | Nad | Cad | Had | Sad | Oad | |
3.25 | 6.93 | 46.22 | 43.6 | 0.84 | 67.16 | 5.09 | 0.25 | 16.48 |
表1 淖毛湖煤工业分析和元素分析(质量分数)单位:%
工业分析 | 元素分析 | ||||||||
---|---|---|---|---|---|---|---|---|---|
Mad | Aad | Vad | FCad | Nad | Cad | Had | Sad | Oad | |
3.25 | 6.93 | 46.22 | 43.6 | 0.84 | 67.16 | 5.09 | 0.25 | 16.48 |
CaO | Fe2O3 | SiO2 | Al2O3 | Na2O | MgO | K2O | SO3 | CuO |
---|---|---|---|---|---|---|---|---|
30.92 | 8.22 | 29.28 | 15.07 | 2.94 | 1.16 | 0.38 | 8.26 | 0.15 |
表2 淖毛湖煤灰分分析(质量分数) (%)
CaO | Fe2O3 | SiO2 | Al2O3 | Na2O | MgO | K2O | SO3 | CuO |
---|---|---|---|---|---|---|---|---|
30.92 | 8.22 | 29.28 | 15.07 | 2.94 | 1.16 | 0.38 | 8.26 | 0.15 |
原煤/μg.g-1 | 水洗煤/% | 乙酸铵洗煤/% | 盐酸洗煤/% |
---|---|---|---|
3150.4 | 43.2 | 28.3 | 18.1 |
表3 原煤以及洗选煤中钠的含量(质量分数)
原煤/μg.g-1 | 水洗煤/% | 乙酸铵洗煤/% | 盐酸洗煤/% |
---|---|---|---|
3150.4 | 43.2 | 28.3 | 18.1 |
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