Prediction system and method of circulating fluidized bed household garbage incineration boiler NOx discharge
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A technology of domestic waste incineration and circulating fluidized bed, which can be used in combustion methods, forecasting, incinerators, etc., and can solve problems such as low local search efficiency
Active Publication Date: 2017-07-07
ZHEJIANG UNIV
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However, as a random search algorithm, the particle swarm optimization algorithm has ce
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Embodiment 1
[0096] refer to figure 1 , figure 2 , image 3 , Figure 4 The present invention provides a NOx emission prediction system for a circulating fluidized bed domestic waste incineration boiler, comprising a circulating fluidized bed domestic waste incineration boiler, a distributed control system for operating the boiler, a data communication interface, a database and a host computer. The database reads data from the distributed control system through the data communication interface, and is used for training, learning and testing of the upper computer. The upper computer performs data exchange with the distributed control system through the data communication interface. The upper computer includes online learning, online update, Validation part and online prediction part. Specifically include:
[0097] Signal acquisition module. This module is used to collect the operating condition parameters and operating variables of the CFB domestic waste incineration boiler when incin...
Embodiment 2
[0149] refer to figure 1 , figure 2 , image 3 , Figure 4 , a kind of circulating fluidized bed domestic waste incineration boiler NOx emission prediction method provided by the present invention, the method comprises the following steps:
[0150] 1) Analyze the operating mechanism and NOx generation mechanism of the circulating fluidized bed domestic waste incineration boiler, and select the waste feeding amount, coal feeding amount, primary air volume, secondary air volume, flue gas oxygen content, furnace negative pressure, bed layer The temperature and the temperature of the dilute phase zone of the furnace are used as the input variables of the NOx emission prediction model.
[0151] Domestic municipal solid waste is mostly collected in a mixed manner, resulting in complex components of waste entering factories and furnaces. Generally, it mainly includes main components such as kitchen waste, paper, plastic, rubber, fabric, wood, bamboo and inorganic substances, show...
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Abstract
The invention discloses a prediction system and a method of circulating fluidized bed household garbage incineration boiler NOx discharge. An integrated modeling method of a BP neural network algorithm and a multi-swarm particle swarm optimization algorithm introducing a simplex operator is adopted to construct a rapid economic self-adaptive updating system and a method for carrying out real time prediction on the boiler flue gas NOx discharge, so that the tedious complex mechanism modeling work is avoided. A dynamic change characteristic of NOx discharge is represented by utilizing the non-linear dynamic characteristic, the generalization ability and the real time prediction ability of the BP neural network algorithm; an initial weight value and a threshold value of the BP neural network are optimized by utilizing the particle swarm optimization algorithm, and the possibility of reaching a local optimum of the BP neural network in a training process is reduced; the simplex operator and the multi-population migration mechanism are introduced, so that the diversity of the particle swarm optimization algorithm and the local searching ability are improved, and the possibility of reaching the local optimum of the particle swarm optimization algorithm is reduced.
Description
technical field [0001] The invention relates to the field of energy engineering, in particular to a system and method for predicting NOx emissions from a circulating fluidized bed domestic waste incineration boiler. Background technique [0002] Since waste incineration can well realize volume reduction, volume reduction, harmlessness and resource utilization of waste treatment technology, in the past ten years, under the guidance of relevant national industrial policies, the domestic waste incineration industry has achieved vigorous development. Since the 1990s, a number of domestic scientific research institutions have conducted a large number of in-depth studies on the combustion mechanism of municipal solid waste (MSW) in China, and have mastered the combustion characteristics of mixed collection, high moisture, and complex MSW. Based on my country's experience in the development of coal, coal gangue and other inferior fuel circulating fluidized bed (Circulating Fluidized...
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