Soft measurement method for fire box temperature of multi-nozzle opposed coal water slurry gasification furnace

A furnace temperature and coal-water slurry technology, which is applied in the energy industry and chemical engineering fields, can solve the problems of short working life of high temperature thermocouples of temperature measuring elements and difficulty in real-time detection of bottlenecks.

Active Publication Date: 2011-09-07
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

Under the action of high temperature (1300~1600℃), high pressure (3.0~6.4MPa), strong corrosive environment and strong air flow, the working life of the high temperature thermocouple of the temperature measuring element is very short
Since it is impossible to frequently replace the thermocouples on site,

Method used

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  • Soft measurement method for fire box temperature of multi-nozzle opposed coal water slurry gasification furnace
  • Soft measurement method for fire box temperature of multi-nozzle opposed coal water slurry gasification furnace
  • Soft measurement method for fire box temperature of multi-nozzle opposed coal water slurry gasification furnace

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Embodiment

[0109] In July 2010, a multi-nozzle opposed coal-water slurry gasifier (such as the device shown in the patent No. 200520047515.3) for nearly 270 hours of operation results of the soft sensor model is as follows Figure 4 shown. The solid line in the figure is the actual measurement data, and the dotted line is the prediction result of the soft sensor model, and the data interval is one hour. Compared with the actual measurement results, the maximum absolute error of the prediction results of the furnace temperature soft sensor model is 4.97%, and the relative error is less than ±5%. Within the allowable range of the error, the accuracy of the prediction results can be guaranteed, and the performance in trend prediction higher accuracy rate.

[0110] In August 2010, the multi-nozzle opposed coal-water slurry gasifier (such as the device shown in the patent number 200520047515.3) has four feeds: the median value of the coal slurry entering the furnace is: 12.5m3 / h, 12m3 / h, 12m...

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Abstract

The invention relates to a soft measurement method for fire box temperature of a multi-nozzle opposed coal water slurry gasification furnace. The method comprises the following steps of: choosing a plurality of measurable process status auxiliary variables, including dried basis coal, oxygen flux at furnace entrance center, coal to oxygen ratio and content of H2, Co and CH4 synthesized at an exit, as input variables of a soft measurement model; simultaneously, acquiring practical operation data of an industrial device, and preprocessing the acquired data; and based on a BP artificial neural network, choosing a 6*6*1 three-layer network topology to train the model through a Levenberg-Marquardt learning algorithm so as to implement the soft measurement for the fire box temperature of the multi-nozzle opposed coal water slurry gasification furnace. The soft measurement technology can provide effective fire box temperature information for the multi-nozzle opposed coal water slurry gasification furnace so as to guide optimal running operations in a gasification process, and the method is also suitable for the soft measurement for the fire box temperature of coal water slurry gasification furnaces of other prior technologies.

Description

technical field [0001] The invention relates to a soft sensing method in the field of energy industry and chemical engineering. Specifically, it is a soft measurement method for the furnace temperature of a multi-nozzle opposed coal-water slurry gasifier. Background technique [0002] my country is rich in coal resources but scarce in oil and gas resources. This special energy resource structure determines that coal will be the main energy source in my country for a long time. However, the overall efficiency of my country's coal utilization rate is low and the pollution is serious. Coal gasification technology is an important way to efficiently and cleanly utilize coal resources. my country's entrained bed coal gasification was completely monopolized by the US GE gasification technology (formerly Texaco technology) in the early period of the "Tenth Five-Year Plan". With the support of the national science and technology plan, the multi-nozzle opposed coal-water slurry gas...

Claims

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Application Information

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IPC IPC(8): G01K13/00G06N3/08C10J3/72
Inventor 钱锋钟伟民程辉杜文莉李杰孔祥东
Owner EAST CHINA UNIV OF SCI & TECH
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