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Prediction system and method for heat efficiency of circulating fluidized bed boiler

A circulating fluidized bed and boiler thermal efficiency technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as low degree of automation, difficulty in fully exploiting boiler energy-saving potential, and lack of predictive systems and methods

Inactive Publication Date: 2013-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most circulating fluidized bed boilers have the characteristics of low degree of automation and relying on manual experience for operation, which makes it difficult to fully tap the energy-saving potential of boilers. An important reason for this situation is the lack of reasonable prediction systems and methods

Method used

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  • Prediction system and method for heat efficiency of circulating fluidized bed boiler
  • Prediction system and method for heat efficiency of circulating fluidized bed boiler
  • Prediction system and method for heat efficiency of circulating fluidized bed boiler

Examples

Experimental program
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Effect test

Embodiment 1

[0133] refer to figure 1 , figure 2 , a circulating fluidized bed boiler thermal efficiency prediction system, including a field intelligent instrument 2 connected to a circulating fluidized bed boiler 1, a data interface 3, a database 4, a control station 5 and a host computer 6, and the field intelligent instrument 2 is connected to a field bus , the data bus is connected with the data interface 3, and the data interface 3 is connected with the database 4, the control station 5 and the upper computer 6, and the upper computer 6 includes:

[0134] The standardization processing module 7 is used to collect historical records of operating condition variables and operating variables from the database, form a training sample matrix X of independent variables, and collect corresponding historical records of excess air coefficient, exhaust gas temperature difference, and carbon content of fly ash , form the dependent variable training sample matrix Y, and standardize the training...

Embodiment 2

[0192] refer to figure 1 , figure 2 , a circulating fluidized bed boiler thermal efficiency prediction method, the prediction method includes the following steps:

[0193] 1) Collect the historical records of operating condition variables and operating variables from the database to form the training sample matrix X of the independent variables, and collect the corresponding historical records of excess air coefficient, exhaust gas temperature difference, and carbon content in fly ash to form the dependent variable training Sample matrix Y, standardize the training sample matrix X, Y, so that the mean value of each variable is 0, the variance is 1, and the standardized independent variable training sample matrix X is obtained * (n×p), 3 normalized dependent variable training sample vectors (k=1,2,3), the following process is used to complete:

[0194] 1.1) Find the mean:

[0195] x ‾ j = ...

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Abstract

The invention discloses a prediction system and method for the heat efficiency of a circulating fluidized bed boiler. The system comprises a field intelligent instrument which is connected with the circulating fluidized bed boiler, a data base, a data interface, a control station and an upper computer; the field intelligent instrument is connected with the control station, the data base and the upper computer, and the upper computer comprises a normalization processing module which is used for collecting training samples of key variables from the data base to perform normalization processing, a prediction mechanism forming module which is used for establishing a prediction module, a prediction execution module which is used for predicting the heat efficiency according to operation conditions of the circulating fluidized bed boiler and set operating variables, a model updating module, a signal acquisition module and a result display module. According to the prediction system and method, the heat efficiency is predicted according to the operation conditions of the circulating fluidized bed boiler and the operating variables, so that suggestion and guidance of operation are facilitated, the heat efficiency of the circulating fluidized bed boiler is improved, and a foundation is laid for further optimization of the operation efficiency.

Description

technical field [0001] The invention relates to the field of energy engineering, in particular to a system and method for predicting thermal efficiency of a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed boilers have the advantages of less pollutant emissions, wide fuel adaptability, and strong load regulation capabilities. In recent years, they have been more and more widely used in electric power, heating and other industries. With the increasing shortage of energy and the continuous enhancement of people's awareness of energy conservation and environmental protection, users urgently need to tap the operating potential of the boiler unit to improve the operating efficiency of the unit. However, most circulating fluidized bed boilers have the characteristics of low degree of automation and relying on manual experience, which makes it difficult to fully tap the energy-saving potential of boilers. An important reason for this situati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 刘兴高吴家标
Owner ZHEJIANG UNIV