All-stage coal spontaneous combustion experimental system

Abstract

The invention discloses a full-stage coal spontaneous combustion experimental system. The system comprises a furnace A and a furnace B, inner walls of the furnace A and the furnace B are respectively provided with a heating device, a reaction tank is arranged in a hearth of the furnace A, a gas inlet is formed in the furnace bottom of the furnace A, and the gas inlet passes through the bottom wall of the reaction tank; a loading crucible is arranged in a hearth of the furnace B, a gas inlet is formed in the middle of the side wall of the furnace B; an air generator is respectively connected with the gas inlets of the furnace A and the furnace B through a gas buffer device; the upper parts of the furnace A and the furnace B are respectively provided with a gas outlet, and the gas outlets are connected with a monitor. The coal spontaneous combustion in a deep burying state, a shallow burying state and a plurality of ventilating states can be simulated by designing two experimental modes.

Description

technical field [0001] The invention relates to a coal spontaneous combustion experiment technology, in particular to an all-stage coal spontaneous combustion experiment system. Background technique [0002] The coal spontaneous combustion test bench is a similar simulation experiment technology for the coal spontaneous combustion process established in the 1990s. According to the amount of coal used in the experiment, the coal spontaneous combustion experimental furnace can be divided into two types: large experimental furnace and small experimental furnace. Large-scale experimental furnaces use a large amount of coal, ranging from hundreds of kilograms to more than ten tons. The oxidation of coal produces a lot of heat and is easy to accumulate, so that the coal can reach the critical temperature of spontaneous combustion at a lower temperature, but it is time-consuming, expensive, and expensive. It is difficult to become a routine test means and method due to many interf...

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Problems solved by technology

[0012] Due to its large size and large amount of coal, the large-scale coal spontaneous combustion test bench has certain advantages in simulating the actual situation of coal spontaneous combustion, but it inevitably has the disadvantages of long test period, poor repeatability, and many interference factors, which makes it difficult to test different coals. The simulation and comparative study of different species, different origins, and different occurrences are more difficult

Moreover, the existing large-scale coal spontaneous combustion test bench also has the problem that the design maximum temperature is low temperature, and it is impossible to simulate the whole stage of coal spontaneous combustion

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