Water extraction from high moisture lignite by means of efficient integration of waste heat and water recovery technologies with flue gas pre-drying system

被引：42
作者：
Han, Xiaoqu [1 ,2 ]
Yan, Junjie [1 ]
Karellas, Sotirios [2 ]
Liu, Ming [1 ]
Kakaras, Emmanuel [2 ]
Xiao, Feng [3 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
[2] Natl Tech Univ Athens, Lab Steam Boilers & Thermal Plants, Heroon Polytech 9, Athens 15780, Greece
[3] China Power Engn Consulting Grp Corp, Northeast Elect Power Design Inst, Changchun 130021, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2017年 / 110卷
基金：
中国国家自然科学基金;
关键词：
Lignite; Flue gas pre-drying; Waste heat utilization; Water recovery; Economic analysis; FIRED POWER-PLANT; OPEN PULVERIZING SYSTEM; LOW-PRESSURE ECONOMIZER; LATENT-HEAT; THERMODYNAMIC ANALYSIS; DRYING PROCESS; EXCHANGER; DESIGN; BOILER; SPRAY;
D O I：
10.1016/j.applthermaleng.2016.08.178
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The flue gas pre-dried lignite-fired power system (FPLPS) integrates the fan mill flue gas dryer with an open pulverizing system and yields an increase of the boiler efficiency. Particularly, the dryer exhaust gas contains a large amount of vapor removed from high moisture lignite, which exhibits great potential for waste heat and water recovery. Two available options are considered to realize the extraction of water from lignite: the low pressure economizer (LPE) for water-cooled units and the spray tower (SPT) integrated with heat pump for air-cooled units. This paper aims at evaluating the energy saving and water recovery potentials of the FPLPS integrated with both schemes. Results showed that the plant efficiency improvement of the FPLPS at base case varied from 1.14% to 1.47% depending on the moisture content of raw lignite. The water recovery ratio and plant efficiency improvement in the optimal LPE scheme were 39.4% and 0.20%, respectively. In contrast, 83.3% of water recover ratio and 110.6 MWth heat supply were achieved in the SPT system. Both schemes were economically feasible with discounted payback periods of around 3 years. Moreover, parametric analysis was conducted to examine the economic viability of both schemes with different lignite types and market factors. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：442 / 456
页数：15
相关论文
共 54 条
[1]   Investigation of technical and economic aspects of pre-dried lignite utilisation in a modern lignite power plant towards zero CO2 emissions [J].
Agraniotis, Michalis ;
Koumanakos, Antonis ;
Doukelis, Aggelos ;
Karellas, Sotirios ;
Kakaras, Emmanuel .
ENERGY, 2012, 45 (01) :134-141
[2]   INVESTIGATION OF PRE-DRYING LIGNITE IN AN EXISTING GREEK POWER PLANT [J].
Agraniotis, Michalis ;
Karellas, Sotirios ;
Violidakis, Ioannis ;
Doukelis, Aggelos ;
Grammelis, Panagiotis ;
Kakaras, Emmanuel .
THERMAL SCIENCE, 2012, 16 (01) :283-296
[3]   Analysis of a heat recovery system of the spray-drying process in a soy protein powder plant [J].
Ai, Songhui ;
Wang, Baolong ;
Li, Xianting ;
Shi, Wenxing .
APPLIED THERMAL ENGINEERING, 2016, 103 :1022-1030
[4]   Water spray for pre-cooling of inlet air for Natural Draft Dry Cooling Towers - Experimental study [J].
Alkhedhair, Abdullah ;
Guan, Zhiqiang ;
Jahn, Ingo ;
Gurgenci, Hal ;
He, Suoying .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2015, 90 :70-78
[5]   Waste heat and water recovery opportunities in California tomato paste processing [J].
Amon, Ricardo ;
Maulhardt, Mike ;
Wong, Tony ;
Kazama, Don ;
Simmons, Christopher W. .
APPLIED THERMAL ENGINEERING, 2015, 78 :525-532
[6]  
[Anonymous], TOPMERET MOD TECHN H
[7]   Utilisation of waste heat from exhaust gases of drying process [J].
Arsenyeva, Olga P. ;
Cucek, Lidija ;
Tovazhnyanskyy, Leonid L. ;
Kapustenko, Petro O. ;
Savchenko, Yana A. ;
Kusakov, Sergey K. ;
Matsegora, Oleksandr I. .
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING, 2016, 10 (01) :131-138
[8]   Thermodynamic analysis and comparison of retrofitting pre-drying concepts at existing lignite power plants [J].
Atsonios, Konstantinos ;
Violidakis, Ioannis ;
Agraniotis, Michalis ;
Grammelis, Panagiotis ;
Nikolopoulos, Nikos ;
Kakaras, Emmanuel .
APPLIED THERMAL ENGINEERING, 2015, 74 :165-173
[9]   Evaluation of retrofitting a conventional natural gas fired boiler into a condensing boiler [J].
Che, DF ;
Liu, YH ;
Gao, CY .
ENERGY CONVERSION AND MANAGEMENT, 2004, 45 (20) :3251-3266
[10]   Condensing boiler applications in the process industry [J].
Chen, Qun ;
Finney, Karen ;
Li, Hanning ;
Zhang, Xiaohui ;
Zhou, Jue ;
Sharifi, Vida ;
Swithenbank, Jim .
APPLIED ENERGY, 2012, 89 (01) :30-36
123456