Method for identifying type of fuel on line

Abstract

The invention provides a new method for identifying the type of a fuel on line, which comprises the following steps: extracting primary characteristic values of a time domain and a frequency domain of a flame from a radiation signal of the flame; subjecting the primary characteristic values first to data preprocessing to change the primary characteristic values into irrelevant orthogonalized characteristic value data, approximating the nonlinear function relationship between the characteristic value data and the fuel types with two layers of neural networks with nonlinear hidden layers to make the output of the neuron of an output layer between 0 and 1, and showing the degree of the similarity of a combusting fuel to a fuel of some type. The primary characteristic values extracted by the method are subjected data preprocessing before being input into the neural networks, so the method can use more useful characteristic information while obviously reducing the complexity of the networks, can increase the training speed of the neural networks and reduce the training time of the neural networks, and also can greatly increase the success rate of fuel type identification.

Description

technical field

[0001] The invention relates to a method for identifying fuel types, in particular to an online identification method for fuel types. The invention belongs to the technical field of boiler fuel type identification methods. Background technique

[0002] China is the world's largest coal producer and consumer, and coal-fired thermal power plants dominate my country's power industry. Due to economic and other reasons, power plants often use different types of coal, and some also burn or add to burn biomass. Coal and biomass are collectively referred to as fuel here. However, there are many types of fuels in the coal storage yard (or fuel pile) of the power plant, and the stacking of various fuels is random, so the type of fuel is usually unknown and unpredictable during combustion. Due to the frequent changes of fuel types, it becomes very difficult to detect and control the combustion situation in the combustion furnace. In severe cases, even vicious acciden...

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