O<sub>2</sub>/CO<sub>2</sub>气氛下稻秆添加磷酸二氢铵对固钾及灰熔融特性的研究

王茜; 韩奎华; 李辉; 齐建荟; 路春美

O₂/CO₂气氛下稻秆添加磷酸二氢铵对固钾及灰熔融特性的研究

山东大学能源与动力工程学院燃煤污染物减排国家工程实验室, 山东济南 250061

基金项目: 国家自然科学基金(51206096);济南高校自主创新基金(201401275)。

详细信息

通讯作者:
韩奎华,E-mail:hankh@163.com

中图分类号: TK6
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出版历程
- 收稿日期: 2015-03-19
- 修回日期: 2015-07-01
- 刊出日期: 2015-08-30

Influence of ammonium dihydrogen phosphates additive on potassium fixation capacity and ash fusibility for rice straw combustion in an O₂/CO₂ atmosphere

National Engineering Laboratory for Coal-Burning Pollutants Emission Reduction, School of Energy and Power Engineering, Shandong University, Jinan 250061, China

摘要

摘要: 研究了21%O₂/79%CO₂气氛下,磷酸二氢铵对稻秆不同温度下的固钾能力及对灰熔融性的影响。利用电感耦合等离子体发射光谱(ICP-AES)、X射线衍射(XRD)以及扫描电子显微镜(SEM)等检测手段,对稻秆燃烧灰中K元素含量、产物物相以及微观形貌进行分析。固定床燃烧固钾实验表明,添加NH₄H₂PO₄能够有效提高稻秆固钾率,900℃下稻秆自身固钾率为14.65%,添加NH₄H₂PO₄后固钾率为68.79%,可以有效抑制生物质燃烧过程中碱金属以气态形式析出,并缓解了灰结渣现象。700℃燃烧条件下NH₄H₂PO₄和钾反应的主要产物为KPO₃;900℃下反应的主要产物为高熔点物质K₂CaP₂O₇,从微观形貌可以看出NH₄H₂PO₄能够抑制灰颗粒的烧结,添加NH₄H₂PO₄能有效提升稻秆灰熔点。
- 生物质 /
- O₂/CO₂燃烧 /
- 磷酸二氢铵 /
- 碱金属
Abstract: Particle agglomeration, fouling on the heating surface and other issues are closely related to the alkali metals during biomass thermo-chemical conversion. The potassium fixation ability and ash fusing characteristics in the combustion of rice straw (RS) added with ammonium dihydrogen phosphate (NH₄H₂PO₄) were studied in a 21%O₂/79%CO₂ atmosphere. The reaction residue from the experiment in a drop tube furnace was analyzed with inductively coupled plasma atomic emission spectrometer (ICP-AES), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The potassium retention ratio of co-combustion of RS and NH₄H₂PO₄ is higher than that of RS alone, especially at 900℃, and the retention ratio increases from 14.65% to 68.79%. The reaction between NH₄H₂PO₄ and alkali metals in rice straw leads to the formation of KPO₃ at 700 ℃ and K₂CaP₂O₇ at 900℃, which is a high melting point compound. SEM analysis on residue indicates the agglomeration is inhibited, and the ash fusion temperature of RS is increased by adding NH₄H₂PO₄. These results can be helpful to the research and development of high-alkali biomass clean utilization process.
- biomass /
- O₂/CO₂ combustion /
- ammonium dihydrogen phosphate /
- alkali metals

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参考文献(21)

周志强.中国能源现状、发展趋势及对策[J]. 能源与环境, 2008, (6): 9-10. (ZHOU Zhi-qiang. Energy situation, development trend and countermeasures of China[J]. Energy Environ, 2008, (6): 9-10.)

MYÖHÄNEN K, HYPPÄNEN T, PIKKARAINEN T, ERIKSSON T, HOTTA A. Near zero CO₂ emissions in coal firing with oxy-fuel circulating fluidized bed boiler[J]. Chem Eng Technol, 2009, 32(3): 355-363.

JORDAL K, ANHEDEN M, YAN J, STRÖMBERG L. Oxyfuel combustion for coal-fired power generation with CO₂ capture-opportunities and challenges[J]. Greenhouse Gas Control Technol, 2005: 201-209.

STURGEON D W, CAMERON E D, FIZGERALD F D. Demonstration of an oxyfuel combustion system[J]. Energy Procedia, 2009, 1(1): 471-478.

李全林. 新能源与可再生能源[M]. 长沙: 东南大学出版社, 2008. (LI Quan-lin. New energy and renewable energy[M]. Changsha: Southeast University Press, 2008.)

NIELSEN H P, FRANDSEN F J, DAM-JOHANSEN K, BAXTER L L. The implications of chlorine-associated corrosion on the operation of biomass-fired boilers[J]. Prog Energy Combust Sci, 2000, 26(3): 283-298.

STEENARI B M, LUNDBERG A, PETTERSSON H, WILEWSKA-BIEN M, ANDERSSON D. Investigation of ash sintering during combustion of agricultural residues and the effect of additives[J]. Energy Fuels, 2009, 23(11): 5655-5662.

WANG L, SKREIBERG O, BECIDAN M. Investigation of additives for preventing ash fouling and sintering during barley straw combustion[J]. Appl Therm Eng, 2014, 70(2): 1262-1269.

马孝琴, 丛晓霞, 秦建光, 骆仲泱, 方梦祥, 余春江. 添加剂对稻秆燃烧过程中碱金属形态分布的影响[J]. 河南农业大学学报, 2009, 43(3): 296-301. (MA Xiao-qin, CONG Xiao-xia, QIN Jian-guang, LUO Zhong-yang, FANG Meng-xiang, YU Chun-jiang. Effects of additives to morphology and distribution of alkalimetals during straw combustion[J]. J Henan Agric Univ, 2009, 43(3): 296-301.)

马孝琴, 秦建光, 骆仲泱, 余春江, 方梦祥, 岑可法. 添加剂对稻草灰熔融特性影响的实验研究[J]. 浙江大学学报(工学版), 2010, 44(8): 1573-1578. (MA Xiao-qin, QIN Jian-guang, LUO Zhong-yang, YU Chun-jiang, FANG Meng-xiang, CEN Ke-fa. Effects of additives on fusion characteristic of ashes during rice straw combustion [J]. J Henan Agric Univ, 2010, 44(8): 1573-1578.)

韩奎华, 齐建荟, 李辉, 路春美. 磷酸二氢铵脱除气相氯化钾的模拟与实验[J]. 化工学报, 2014, 65(3): 1093-1098. (HAN Kui-hua, QI Jian-hui, LI Hui, LU Chun-mei. Simulation and experiments of removal process of gaseous KCl by ammonium dihydrogen phosphate[J]. CIESC J, 2014: 65(3): 1093-1098.)

李琳娜, 任强强, 李诗媛, 吕清刚. 富磷添加剂对麦秆燃烧过程中碱金属迁移转化行为的影响[J]. 中国电机工程学报, 2013, 33(26): 41-47. (LI Lin-na, REN Qiang-qiang, LI Shi-yuan, LÜ Qing-gang. Behavior of alkali metals during combustion of wheat straw with phosphorus-rich additives[J]. Proc CSEE, 2013, 33(26): 41-47.)

KNUDSEN T N, JENSEN P A, DAM-JOHANSEN K. Transformation and release to the gas phase of Cl K and S during combustion of annual biomass[J]. Energy Fuels, 2004, 18(5): 1385-1399.

WESTBERG H M, BYSTRÖM M, LECKNER B. Distribution of potassium, chlorine, and sulfur between solid and vapor phases during combustion of wood chips and coal[J]. Energy Fuels, 2003, 17(1): 18-28.

KNUDSEN J N, JENSEN P A, DAM-JOHANSEN K. Transformation and release to the gas phase of Cl, K, and S during combustion of annual biomass[J]. Energy Fuels, 2004, 18(5): 1385-1399.

齐建荟. 磷酸二氢铵对生物质燃烧、固钾和灰熔融特性的影响研究. 济南: 山东大学, 2015. (QI Jian-hui. Effect of ammonium dihydrogen phosphate on biomass combustion potassium retention and ash fusibility characteristics. Jinan: Shandong University, 2015.)

LI H, HAN K H, WANG Q, LU C M. Influence of ammonium phosphates on gaseous potassium release and ash-forming characteristics during combustion of biomass[J]. Energy Fuels, 2015, 29(4): 2555-2563.

ZHOU B, ZHOU H, WANG J, WANG J Y, CEN K F. Effect of temperature on the sintering behavior of Zhundong coal ash in oxy-fuel combustion atmosphere[J]. Fuel, 2015, 150: 526-537.

陈连梅, 王中华, 陈天朗. 偏磷酸钾制备方法研究[J]. 化学研究与应用, 2004, 16(6): 854-856. (CHEN Lian-mei, WANG Zhong-hua, CHEN Tian-lang. A study on preparation method of KPO₃[J]. Chem Res Appl, 2004, 16(6): 854-856.)

CHEN C, ZHAO C, LIANG C. Calcination and sintering characteristics of limestone under O₂/CO₂ combustion atmosphere[J]. Fuel Process Technol, 2007, 88(2): 171-178.

NOVAKOVIC A, VAN LITH S C, FRANDSEN F J, JENSEN P A, HOLGERSEN L B. Release of potassium from the systems K-Ca-Si and K-Ca-P[J]. Energy Fuels, 2009, 23(7): 3423-3428.

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