A device and method for rapidly detecting coal ash and calorific value

Abstract

The invention provides a device and method for rapidly detecting the ash content and the heat value of coal. The device comprises an oxygen bomb, a pressure detection unit, a high-pressure control unit, a throttle unit, a CO2 detection unit, a PLC (Programmable Logic Controller) control unit, a host computer, an electronic analysis balance and a power supply. According to the device and method for rapidly detecting the ash content and the heat value of coal, the method comprises the following steps: confirming the ash content according to a mass ratio before and after coal combustion, confirming a high-level heat value of a coal dry basis according to the concentration of CO2 and peak pressure after pressure is stabilized, confirming a low-level heat value of a coal air dried basis according to the high-level heat value of the coal dry basis, and confirming a low-level heat value of a coal received basis according to the low-level heat value of the coal air dried basis, and the like. The device and the method are low in testing environment requirement and rapid and stable in testing.

Description

technical field [0001] The invention belongs to the field of coal quality detection and analysis, and in particular relates to a device and method for rapidly detecting ash content and calorific value of coal quality samples. Background technique [0002] The industrial analysis of coal is an important index to understand the characteristics of coal quality, and it is also the basic standard for evaluating coal quality. According to the calculation results of moisture, ash, volatile matter and fixed carbon in coal measured by industrial analysis, sulfur content, and calculation of calorific value, the nature and type of coal can be preliminarily judged. The processing and utilization effects of various coals and their industrial uses. The various data measured by industrial analysis are physical and chemical indicators that determine the direction of the coal industry. The industrial analysis results that can truly reflect the characteristics of coal itself have reliable g...

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Problems solved by technology

[0003] The existing technology uses a muffle furnace to measure the ash content. In the actual test, in order to achieve the effect, it is necessary to repeat the measurement many times. The test requirements are high and the test time is long, which is not conducive to rapid measurement.

[0004] The prior art uses a calorimeter to measure the calorific value. The specific method is to measure it in an oxygen bomb calorimeter. A certain amount of coal sample is taken and burned completely in an oxygen bomb calorimeter filled with oxygen. In a container with a certain amount of water, the heat released after the coal sample is burned will increase the temperature of the oxygen bomb calorimetry thermal system, and the calorific value can be calculated by measuring the temperature rise of the water. This method needs to be measured in water. The measuring equipment is not easy to move and is limited to use in the laboratory, which has high requirements on the test environment and is not conducive to fast real-time measurement

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