A device for measuring mercury content in coal

Abstract

The invention provides a coal mercury content measuring device. The coal mercury content measuring device comprises a flowmeter, a converter for Hg2+, a mercury analyzer, an A / D converter, an industrial personal computer and a smoke generator, wherein the flowmeter and the converter for Hg2+ are connected with the mercury analyzer by use of conduits; the smoke generator comprises a smoke generation furnace and a gas fuel supply system which comprises a CO gas tank, an O2 gas tank, a mixed gas chamber and fuel nozzles; the fuel nozzles are symmetrically arranged on the inner wall of the smoke generation furnace; a holder is mounted at the bottom of the smoke generation furnace; a coal sample vessel is arranged above the holder and a coal sample is put into the coal sample vessel; a thermocouple is arranged on the top of the smoke generation furnace and a flow through hole is formed in the top of the smoke generation furnace; the flow through hole is connected with the flowmeter by use of a conduit. The coal mercury content measuring device has the advantages of simplicity and convenience in calibration, large measurement range, short detection time and the like; the coal mercury content measuring device is capable of realizing quick measurement on the mercury content in the coal and is especially suitable for measuring the mercury content in the commercial coal.

Description

technical field [0001] The invention relates to a measuring device for mercury content in coal, which belongs to the technical field of coal quality inspection. Background technique [0002] my country is a large coal trading country. In 2013, coal imports were 327 million tons, accounting for nearly 9% of the country's annual coal consumption. At present, from a macro perspective, the control of coal quality is still based on the principle of "high quality and high price" and relies on the market's spontaneous adjustment. The buyers and sellers of commercial coal often only pay attention to conventional industrial analysis indicators such as moisture, ash, and sulfur that affect coal pricing. , less attention has been paid to the content of harmful trace elements such as Hg and Pb in coal. For long-distance transported coal, especially imported coal, it is necessary to strengthen the detection and supervision of trace elements. The "Interim Measures for Commercial Coal Qua...

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Problems solved by technology

For example, the national standard GB / T 16659-2008 and the patent CN101839900B all use this measurement method. The main disadvantages of chemical digestion are: first, it is not convenient to configure different concentrations and types of chemical reagents; The measurement often takes several hours or even a day; the measurement gas chambers of the usual mercury analyzers are all fixed lengths, so when calibrating, it is necessary to configure at least three standard samples of different concentrations (the more the calibration effect is, the better), In addition, when measuring low concentrations, it is often necessary to cooperate with other techniques such as amalgam enrichment to achieve the measurement effect, which is not simple enough

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