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Optimization system and method for sootblowing of circulating fluidized bed boiler

A circulating fluidized bed and boiler soot blowing technology, which is applied in the directions of fluidized bed combustion equipment, combustion methods, and fuel burned in a molten state, can solve the problems of shortening the life of the heating surface, over-blowing, under-blowing, etc.

Inactive Publication Date: 2016-09-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Application Information

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Problems solved by technology

Nowadays, boilers in power plants mostly use regular soot blowing. Due to the complex factors of soot on the heating area, problems of under-blowing and over-blowing often occur.
Under-blowing will lead to low heat transfer efficiency, which will affect the efficiency of the boiler; frequent soot blowing will not only consume a lot of energy, but also cause damage to the heating surface of the boiler due to abrasion and thermal stress, shorten the life of the heating surface, and increase the efficiency of blowing. Ash installation maintenance fee

Method used

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  • Optimization system and method for sootblowing of circulating fluidized bed boiler
  • Optimization system and method for sootblowing of circulating fluidized bed boiler
  • Optimization system and method for sootblowing of circulating fluidized bed boiler

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Embodiment 1

[0119] Taking a 300MW circulating fluidized bed boiler as the research object, two load intervals of 200MW~250MW and 250MW~300MW were studied respectively. The data communication module collected 3600 sets of data under different load sections, and the sampling time was 1s. 1000 groups are used as training samples, and 100 groups are used as test samples. In the test of the two-stage load, the overall effect of the 250MW~300MW load section is better.

[0120] In the 250MW ~ 300MW load segment, set 7 fruit fly groups, that is, 7 adjustable variables (see Table 1), the number of fruit flies in each group is 40, and the number of iterations is 100. Based on the ε-fuzzy tree method FFG 、FF S 、FF K , T py , η Boiler The model has a small error, the relative error of the training sample is 0.27%, 0.19%, 0.21%, 0.36%, 0.15%, and the relative error of the prediction sample is 1.17%, 0.98%, 1.01%, 1.23%, 1.15% %. Among them, the boiler efficiency η Boiler With the oriented optim...

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Abstract

The invention relates to an optimization system and method for sootblowing of a circulating fluidized bed boiler. A heat-delivery surface pollution factor monitoring module is used for establishing a predictive model of pollution factors of an overheater or a reheater, pollution factors of an economizer, pollution factors of an air preheater, exhaust gas temperature and boiler efficiency by an epsilon-fuzzy tree method through process data which is read by a data communication module from a DCS; then a heat-delivery surface pollution factor optimizing module uses the exhaust gas temperature and the boiler efficiency as guiding and adopts an improved drosophila optimization algorithm for optimizing a predictive value in the heat-delivery surface pollution factor monitoring module so that an optimal set value with adjustable variables is obtained, and the optimal adjustable variable value is transmitted to the DCS through the data communication module so that the operation of site equipment is guided; a heat-delivery surface sootblowing decision-making module is used for setting a critical pollution factor value through real-time monitored situations, and when the monitored heat-delivery surface pollution factors exceed critical pollution factors, sootblowing of a heat-delivery surface is guided. According to the optimization system and method disclosed by the invention, the purposes of energy-saving sootblowing and sootblowing as required are fundamentally achieved.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed soot blowing, in particular to a circulating fluidized bed boiler soot blowing optimization system and method. Background technique [0002] my country is a big country in energy consumption and pollutant gas emissions, and its characteristics are: a large amount, a large share, and continues to grow. The energy consumption structure is dominated by coal, and thermal power generation mainly relies on coal, which has brought serious environmental pollution problems. Therefore, developing clean coal power generation technology, improving power generation efficiency, and reducing pollution emissions has become an important strategic decision for the sustainable development of my country's energy and economy. Circulating fluidized bed combustion technology is a new type of high-efficiency, low-pollution clean combustion technology. It has the unique advantages of combustible low-qua...

Claims

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Application Information

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IPC IPC(8): F23C10/28F23J3/00
CPCF23C10/28F23J3/00
Inventor 张文广张越刘吉臻曾德良牛玉广高明明房方杨婷婷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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