济南市某区域锅炉房热电联产与烟气余热回收改造研究
发布时间：2019-05-20 09:22
【摘要】：济南某区域锅炉房配备两台75t/h中温中压蒸汽锅炉,生产的蒸汽经过减温减压后输送至周边各小区进行汽水换热,换热后的热水供热用户取暖。一直以来,供热成本居高不下,节能降耗改造迫在眉睫。本文从该锅炉房的能耗分析、节能改造实施方案和节能技术研究等几个方面进行了探讨。一是通过对近三年来的能耗统计数据、锅炉正反平衡效率测试及对连续58天烟气数据的跟踪统计,根据能耗分析方法分析了锅炉房的能耗现状。锅炉运行热效率偏低、供热系统不合理浪费了蒸汽的做功能力、输送管网网损较大、冷凝水未做回收、烟气余热直接排放等问题均是导致该锅炉房能耗偏高的原因。笔者认为该区域锅炉房具有较大的节能潜力,通过进行热电联产改造、汽水首站建设和烟气余热回收改造等项目能够达到节能降耗的目的。二是提出了热电联产改造方案和首站建设方案,具体从设备选型、系统设计和经济效益等几个方面展开了详细阐述,通过对改造方案的经济效益估算可知,热电联产改造项目,盈利高达3936.1(万元/a),投资回收期仅0.21a,建设换热首站回收凝结水的节能回收收益高达1424.07万元/a,投资回收期为1.16a。引进了(火用)分析原理,认为通过(火用)效率的分析可以从技术上进一步研究热电联产的节能效果,并针对相应的热电联产改造方案建立了系统模型,通过(火用)效率计算对小型热电联产相对分产的节能效果进行了分析和探讨。三是对中、低温烟气的余热利用进行了热力学分析和技术研究,对三种常用的余热回收利用方式的节能率进行了计算和分析,认为对于中、低温烟气的余热利用,可以通过各种热交换设备将烟气的热能传递给不同工作介质而加以利用能够到达节能的效果。然后又针对性的提出了详细的烟气余热回收方案及工程实施方案,并进行了经济效益估算,安装烟气余热回收系统后,回收热量的经济收益为165.89万元/a,投资回收期3.32a。
[Abstract]:A boiler room in Jinan is equipped with two 75t/h medium temperature and medium pressure steam boilers. After temperature reduction and decompression, the produced steam is transported to the surrounding districts for steam and water heat transfer, and the hot water heating users after heat transfer. For a long time, the heating cost is high, energy saving and consumption reduction transformation is urgent. This paper discusses the energy consumption analysis of the boiler room, the implementation scheme of energy saving transformation and the research of energy saving technology. First, through the statistical data of energy consumption in the past three years, the positive and negative balance efficiency of boiler and the tracking statistics of 58 days of flue gas data, the present situation of energy consumption of boiler room is analyzed according to the energy consumption analysis method. The low thermal efficiency of boiler operation, the unreasonable waste of steam work capacity in heating system, the large network loss of transportation network, the lack of recovery of condensate water and the direct discharge of waste heat from flue gas are the reasons for the high energy consumption of the boiler room. The author believes that the boiler room in this area has great potential for energy saving, and the purpose of energy saving and consumption reduction can be achieved through the transformation of cogeneration, the construction of steam and water first station and the recovery and transformation of waste heat from flue gas. Second, the transformation scheme of cogeneration and the construction scheme of the first station are put forward, which are expounded in detail from the aspects of equipment selection, system design and economic benefit. Through the estimation of the economic benefit of the transformation scheme, it can be seen that the cogeneration transformation project, The profit is as high as 3936.1 (ten thousand yuan / a), investment recovery period is only 0.21 a, the energy saving recovery income of condensate water recovered at the first heat transfer station is as high as 14.2407 million yuan / a, and the investment recovery period is 1.16 a. The principle of exergy analysis is introduced, and it is considered that the energy saving effect of cogeneration can be further studied from the technical point of view through the analysis of exergy efficiency, and the system model is established for the corresponding transformation scheme of cogeneration. The energy saving effect of relative partial production of small cogeneration is analyzed and discussed by exergy efficiency calculation. Third, the thermodynamic analysis and technical research on the waste heat utilization of medium and low temperature flue gas are carried out, and the energy saving rates of three commonly used waste heat recovery and utilization methods are calculated and analyzed, and it is considered that for the utilization of waste heat of medium and low temperature flue gas, The heat energy of flue gas can be transferred to different working media through various heat exchange equipment, and the effect of energy saving can be achieved. Then the detailed scheme of flue gas waste heat recovery and the project implementation scheme are put forward, and the economic benefits are estimated. After installing the flue gas waste heat recovery system, the economic benefit of heat recovery is 1.6589 million yuan / a. The payback period is 3.32a.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU995;X70
本文编号：2481543
[Abstract]:A boiler room in Jinan is equipped with two 75t/h medium temperature and medium pressure steam boilers. After temperature reduction and decompression, the produced steam is transported to the surrounding districts for steam and water heat transfer, and the hot water heating users after heat transfer. For a long time, the heating cost is high, energy saving and consumption reduction transformation is urgent. This paper discusses the energy consumption analysis of the boiler room, the implementation scheme of energy saving transformation and the research of energy saving technology. First, through the statistical data of energy consumption in the past three years, the positive and negative balance efficiency of boiler and the tracking statistics of 58 days of flue gas data, the present situation of energy consumption of boiler room is analyzed according to the energy consumption analysis method. The low thermal efficiency of boiler operation, the unreasonable waste of steam work capacity in heating system, the large network loss of transportation network, the lack of recovery of condensate water and the direct discharge of waste heat from flue gas are the reasons for the high energy consumption of the boiler room. The author believes that the boiler room in this area has great potential for energy saving, and the purpose of energy saving and consumption reduction can be achieved through the transformation of cogeneration, the construction of steam and water first station and the recovery and transformation of waste heat from flue gas. Second, the transformation scheme of cogeneration and the construction scheme of the first station are put forward, which are expounded in detail from the aspects of equipment selection, system design and economic benefit. Through the estimation of the economic benefit of the transformation scheme, it can be seen that the cogeneration transformation project, The profit is as high as 3936.1 (ten thousand yuan / a), investment recovery period is only 0.21 a, the energy saving recovery income of condensate water recovered at the first heat transfer station is as high as 14.2407 million yuan / a, and the investment recovery period is 1.16 a. The principle of exergy analysis is introduced, and it is considered that the energy saving effect of cogeneration can be further studied from the technical point of view through the analysis of exergy efficiency, and the system model is established for the corresponding transformation scheme of cogeneration. The energy saving effect of relative partial production of small cogeneration is analyzed and discussed by exergy efficiency calculation. Third, the thermodynamic analysis and technical research on the waste heat utilization of medium and low temperature flue gas are carried out, and the energy saving rates of three commonly used waste heat recovery and utilization methods are calculated and analyzed, and it is considered that for the utilization of waste heat of medium and low temperature flue gas, The heat energy of flue gas can be transferred to different working media through various heat exchange equipment, and the effect of energy saving can be achieved. Then the detailed scheme of flue gas waste heat recovery and the project implementation scheme are put forward, and the economic benefits are estimated. After installing the flue gas waste heat recovery system, the economic benefit of heat recovery is 1.6589 million yuan / a. The payback period is 3.32a.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU995;X70
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