System for monitoring boiler efficiency of thermal power station on line based on identification of calorific capacity of fire coal
A technology for power station boilers and monitoring systems, applied in the field of monitoring systems, can solve problems such as insufficiency and deviation between boiler efficiency and actual values, and achieve the effects of easy data, good versatility and robustness, and low requirements for actual measurement systems
Inactive Publication Date: 2013-05-01
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
However, this technology uses the industrial analysis data of coal combustion, and adopts the method of setting values for the low calorific value of coal combustion. For units with large fluctuations in coal combustion, there is a certain gap between the boiler efficiency calculated by this method and the actual value. Deviation, can not meet the requirements of a more accurate higher step
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[0041] This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0042] The boiler in this embodiment satisfies the following conditions:
[0043] 1. The boiler is HG-1025 / 17.3-WM18 type, the boiler load is 300MW, the boiler adopts subcritical, natural circulation, one intermediate reheating, double arch single furnace, "W" flame combustion mode, double flue at the tail, flue gas Baffle temperature adjustment, balanced ventilation, solid slag discharge, open-air layout, all-steel suspended drum furnace;
[0044] 2. The combustion and heat transfer processes in the furnace can be approximately considered separately;
[0045] 3. The external heat flow of the heat exchanger is evenly distributed along the tube length and circumference;
[0046] 4. The metal of the heat e...
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The invention discloses a system for monitoring the boiler efficiency of a thermal power station on line based on identification of calorific capacity of fire coal in the technical field of information processing. The system comprises a data acquisition module, a data preprocessing module, a coal and smoke characteristic module and a boiler efficiency computation module. The method comprises the following steps of: connecting an object linking and embedding (OLE) for process control (OPC) interface and a distributed control system server to acquire the required actual operating data of a unitand storing the data in a real-time database of an upper computer; preprocessing the real-time data in an upper computer system, performing dynamic energy balance of a smoke side and a working mediumside on all heating sides of a boiler, and identifying the actual calorific capacity of fire coal in a hearth by a soft measurement method to acquire the corrected actual lower heating value of the fire coal; correcting fire coal elementary composition involving efficiency calculation by using everyday coal quality industrial analysis data; and finally, monitoring the boiler efficiency on line.
Description
technical field [0001] The invention relates to a monitoring system in the technical field of information processing, in particular to an online monitoring system for thermal power plant boiler efficiency based on coal-fired calorific value identification, which can be widely used in coal-fired power plant boilers and industrial boilers. Background technique [0002] Today, as energy conservation and environmental protection are increasingly valued, thermal power plants, as large energy consumers related to my country's national economy and people's livelihood, how to reduce energy consumption and emissions as much as possible on the basis of ensuring safe production has become a very urgent problem for them. [0003] As the key equipment for the operation of coal-fired thermal power plants, boilers are also the focus of energy saving and consumption reduction in power plants. The adjustment and optimization of combustion is an effective means to improve boiler efficiency and...
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IPC IPC(8): G01K17/00
Inventor 王景成史元浩王斌吕鹏宏宋燕赵广磊
Owner SHANGHAI JIAOTONG UNIV