Circular coal pile internal temperature simulation method and system

Abstract

The invention discloses a circular coal pile internal temperature simulation method and system, and belongs to the technical field of digital coal yards. Comprising the following steps: S1, acquiring three-dimensional point cloud data of the surface temperature of the whole coal pile; s2, substituting the surface temperature of the coal pile as an initial value into the coal pile temperature field model of the volume element scale, and obtaining the internal temperature of the coal pile through iterative solution. According to the method, the internal temperature of the coal pile is calculated on the basis of the temperature change physicochemical principle in the natural oxidation process of the coal pile, and finally a temperature field model is generated and visualized according to the calculation result, so that two engineering models of heat transfer brought by gas flow between porous media and heat generated by reaction of coal and air are added on the basis of a heat conduction equation; the multi-physical processes such as chemical reaction, porous medium multi-component seepage and solid heat conduction are simplified, the calculation efficiency can be improved, and the requirement for the calculation speed of an actual engineering project is met.

Description

technical field [0001] The invention belongs to the technical field of digital coal yards, and more particularly relates to a method and system for simulating the internal temperature of a circular coal pile. Background technique [0002] Coal, as one of the indispensable energy sources for human beings, has abundant reserves and good peak-shaving performance in my country, making it still the main force of my country's energy structure for a period of time in the future. As coal prices rise, coal yard management becomes more and more important. Coal will slowly oxidize under natural conditions, and the temperature of the lower layer of the coal pile will gradually rise, and there may even be a risk of spontaneous combustion. Therefore, the temperature of coal is an important indicator directly related to the safety of the coal yard. Quickly and accurately predicting the internal temperature change of coal piles is of great significance for coal yard management. [0003] A...

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Problems solved by technology

Patent CN207650964U fixes the infrared dual-vision thermal imager on the cantilever tape machine, and obtains the temperature of the coal pile by scanning the coal field in all directions. However, the infrared dual-view thermal imager is difficult to accurately measure the internal temperature of the thicker coal pile; patent CN211552908U A device for measuring the temperature and atmosphere inside a coal pile is provided. One end of the measuring rod of the device is connected to a gas sampling unit. The other end is connected to the gas temperature and humidity detection unit. The gas temperature and humidity detection unit is connected to the gas composition detection unit through an external connecting rod. This device has excellent measurement accuracy, but it is still limited by local temperature measurement and cannot measure the overall temperature of the coal pile.

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