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

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...

AI Technical Summary

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, the thermocouples installed under normal circumstances are only used during the start-up process to ensure the observation of temperature changes during feeding. The real-time detection of the furnace temperature of the multi-nozzle opposed coal-water slurry gasifier has always been a bottleneck problem.

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