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A device and method for online integrated continuous and rapid determination of moisture and ash

A rapid determination of moisture, applied in measuring devices, by removing certain components to weigh, analyze materials, etc., can solve the problems of high price, long measurement time, non-representative, etc., to improve productivity and work Efficiency, fast measurement speed, and improved reliability

Active Publication Date: 2021-06-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is the testing standard for all measuring instruments, but it has the disadvantages of cumbersome operation, continuous measurement of moisture and ash, and long time consumption. It cannot realize rapid and continuous sample measurement, and cannot satisfy the rapid determination of some parameters in the process of process testing.
The industrial analyzer used in the laboratory can continuously measure moisture, ash, and volatile matter in a variety of ways, but the measurement time is long, taking 1-2 hours, and it takes longer to measure samples with high water content and difficult to burn through in the actual industry , the accuracy is poor; and only samples <100mg can be analyzed, which is not representative
However, foreign instruments with high measurement capacity are relatively expensive and take a long time to measure, which is not suitable for industrial requirements.

Method used

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  • A device and method for online integrated continuous and rapid determination of moisture and ash
  • A device and method for online integrated continuous and rapid determination of moisture and ash
  • A device and method for online integrated continuous and rapid determination of moisture and ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The determination of the moisture and ash content of the Shenmu bituminous coal used in the experiment includes the following steps:

[0041] (1) Before the start of the test, use a standard thermocouple to calibrate the temperature range first, measure the moisture at about 150°C, measure the ash at about 820°C, determine the position of the elevator, and record it by the computer;

[0042] (2) Put the distribution plate groove in the reaction tube, adjust the gas (nitrogen or air) flow rate (20ml / min), the mesh number of the raw coal is below 2.5mm, select the distribution plate groove with an aperture of 0.7cm, and determine the analytical balance Zero point, take out the groove.

[0043] (3) Place about 700mg of crude coal sample in the corundum hanging basket in the device, automatically read the initial mass of the sample, put it into the groove of the distribution plate selected in step (2), raise it to a temperature range of 150°C, and The inlet pipe feeds nitr...

Embodiment 2

[0050] For the determination of the moisture and ash content of the generated slag samples with high water content, select the slag samples with large water content in step (2), select the distribution plate groove of 0.5 cm, and determine the zero point of the balance, and the rest of the steps are the same as in Example 1. The measurement time is <30min, and the comparison between the measured results and the national standard is as follows:

[0051] Table 2

[0052]

Embodiment 3

[0054] For most of the fine powder samples smaller than 0.5 mm, a 1 cm distribution plate groove is selected in step (2) to determine the zero point of the analytical balance, and the rest of the steps are the same as in Example 1. The measurement time is <10min, and the comparison between the measured results and the national standard is as follows:

[0055] table 3

[0056]

[0057] The comparison of three examples shows that the device of the present invention measures a large number of solid samples faster than the national standard method, and can provide data for continuous industrial test operation; for samples with coarser particles, the error is greater and the time-consuming is longer.

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Abstract

The invention discloses an on-line integrated continuous rapid determination device and method for moisture and ash content. The rapid determination device for moisture and ash content in the present invention is mainly composed of lifting parts, heating parts, temperature control parts, sample weighing parts, device support frame and numerical control parts , easy to get, cheap. The measurement method is to place the crude sample in a large corundum hanging basket, place the corresponding distribution plate groove, the hanging basket is in the temperature range of about 150°C, heat it with nitrogen gas until the quality is constant, and then send the sample into the temperature range of about 820°C, Switch the air until the quality is constant, automatically draw the weight loss curve, and get the moisture and ash content. The whole process is completed within half an hour depending on the sample. The invention has the advantages of being able to measure the moisture and ash of a large sample size (≥100mg) in real time in a large-scale process, with fast measurement speed (powdered coal samples can be completed within ten minutes), convenient operation and low equipment cost.

Description

technical field [0001] The invention relates to an on-line integrated continuous rapid determination device and method for moisture and ash, specifically for solid samples such as coal, coke, fine powder, ash, etc. Device and method for continuous rapid determination. Background technique [0002] During various coal and biomass-related industrial and process tests, it is necessary to monitor the moisture and ash content of the material in real time in order to quickly calculate the carbon balance, and then adjust the corresponding process conditions to improve the yield and work efficiency. The larger the weight of the sample taken, the stronger the representativeness, but the corresponding measurement time is longer. The present invention is designed to solve this problem in fast real-time industrial sample moisture and ash analysis. The determination of moisture and ash is based on the national standard GB / T212. The determination principle is: under a certain time and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04G01N5/045
Inventor 宋双双李勇博王志青董立波黄戒介房倚天
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI