Large-particle coke combustion characteristic testing system

Abstract

The invention discloses a large-particle coke combustion characteristic testing system, and belongs to the technical field of experimental equipment. The testing system comprises a furnace body and abracket for supporting the furnace body, the testing system further comprises a workbench, a lifting device, a water cooling device and an air inlet and equalizing device. The boiler body is divided into the three sections of heating areas, the highest heating temperature of the upper section of heating area and the lower section of heating area is 1350 DEG C, the highest heating temperature of the middle section of heating area is 1600 DEG C, and the large-particle combustion high-temperature requirement of the grate-fired boiler can be actually simulated. The lifting speed and the lifting height of the fuel are controlled by adopting a double-guide-rail lifting platform so as to simulate the processes of heating, burning and burnout of the fuel of the grate-fired boiler after the fuel enters the boiler. The testing system disclosed by the invention can effectively solve the technical problems existing in researching the reaction characteristics of coal coke by adopting a thermogravimetric analyzer at present, provides theoretical support for optimizing the combustion of the grate-fired boiler, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of experimental equipment, and relates to an experimental device for studying the combustion reaction characteristics of coal char, in particular to a large-particle coal char combustion characteristic testing system. Background technique [0002] There are a large number of industrial boilers in my country. As of 2018, the total number of industrial boilers in my country is about 390,000. The number of coal-fired chain boilers in industrial boilers is huge. According to literature records, the number of coal-fired chain boilers was nearly 300,000 in 2010. With the With the implementation of the "Comprehensive Improvement Project for Energy Conservation and Environmental Protection of Coal-fired Boilers" and the implementation of the "coal-to-gas" project, the number of gas-fired boilers has increased and some small chain boilers have been removed, but the number of existing chain boilers still occupies an imp...

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Problems solved by technology

[0003] The coal particle size of the bed-fired coal-fired boiler is relatively large, and the maximum coal particle size of 30-40mm can be burned. However, due to the influence of the effective diffusion coefficient of the ash layer and the decline in the coke reaction characteristics during the combustion of large particles, the layer-fired boilers are common. Problems such as high carbon content in ash

At present, thermogravimetric analysis is mostly used to study the combustion reaction characteristics of coal char, but the maximum particle weight of thermogravimetric analyzers is generally about 2 mg, and it is affected by the heating rate (generally less than 50°C / min) and the maximum temperature (generally 1200°C). , can not directly reflect the reaction characteristics of large particles of coal char

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