Visual detection method of pulverized coal combustion ratio
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A technology of pulverized coal combustion rate and detection method, which is applied in the direction of using combustion for chemical analysis, etc., can solve the problem of low coal combustion rate and achieve accurate results of combustion rate
Inactive Publication Date: 2015-07-08
UNIV OF SCI & TECH LIAONING
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[0005] The purpose of the present invention is to provide a visual detection method for the combustion performance of pulverized coal, which preheats the pulverized coal sample and the pulverized coal carrier gas respectively, and solves the problem that the low temperature carrier gas is wrapped in the coal by setting an observation hole on the side wall of the burner. Around the pulverized coal particles, it affects the temperature rise of pulverized coal and causes the problem of low pulverized coal combustion rate, and it can also monitor and analyze the pulverized coal combustion situation in real time
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Embodiment 1
[0024] A kind of anthracite was selected as the test sample, and its industrial analysis and elemental analysis results are shown in Table 1, respectively.
[0025] Table 1 Industrial analysis of anthracite samples, wt%
[0026]
[0027] The steps of a visual detection method for pulverized coal combustion rate are as follows:
[0028] (1) Place the lumpy coal sample in a constant temperature drying oven at 105°C to dry for 4 hours, then use a sealed vibrating pulverizer to crush the coal sample, crush and sieve the coal sample to below 200 mesh (0.074mm), as the Test samples. Open all the electromagnetic valves 2 (①, ②, ③, ④, ⑤) of the device, use the air in the carrier gas preheating furnace 3 as the carrier gas for injecting pulverized coal, and close the electromagnetic valves at both ends of the pulverized coal carrier gas preheating furnace. Valves ① and ② preheat the pulverized coal carrier gas through the heating furnace, and preheat the pulverized coal carrier ga...
Embodiment 2
[0052] A kind of bituminous coal was selected as the test sample, and its industrial analysis and elemental analysis results are shown in Table 3, respectively.
[0053] Table 3 Industrial Analysis and Elemental Analysis of Bituminous Coal Samples
[0054]
[0055] The steps of a visual detection method for pulverized coal combustion rate are as follows:
[0056] (1) Crush the lumpy coal sample through a sealed vibrating pulverizer, and select coal powder below 200 mesh (0.074mm) as the test sample. First, open the electromagnetic valve 2 (①, ②, ③, ④, ⑤) of the device, and feed air into the preheating furnace 3 as the carrier gas for injecting pulverized coal for preheating. When the pulverized coal carrier gas preheating furnace is full of gas Finally, close the electromagnetic valves ① and ② at both ends of the pulverized coal carrier gas preheating furnace, and enter the pulverized coal to be burned into the pulverized coal preheating device 4 through the pulverized coa...
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Abstract
The invention discloses a visual pulverized coal combustion performance detection method for monitoring and analyzing pulverized coal combustion condition in real time. The method comprises the following steps: preheating a pulverized coal sample to 50-400 DEG C; preheating pulverized coal carrier gas to 50-400 DEG C; spraying the pulverized coal into a combustor by using gas produced by pressure difference in a pipeline; visualizing the pulverized coal combustion process, recording the pulverized coal combustion process through a camera; cooling flue gas; collecting unburned pulverized coal; collecting the flue gas and computing the pulverized combustion ratio. Through the adoption of the visual pulverized coal combustion performance detection method, the pulverized coal sample and the pulverized coal carrier gas are respectively pre-heated, the pulverized coal combustion process is visual; the combustion ratio of the pulverized coal is computed respectively through a flue gas component analysis method and an ash content quality balance method, the combustion performance of the coal sample is represented by using the average value of the combustion ratios obtained by the two method, and the obtained combustion ratio result is more accurate.
Description
technical field [0001] The invention relates to the field of measuring the combustion rate of pulverized coal, in particular to a visual detection method for the combustion rate of pulverized coal. Background technique [0002] Coal is currently the most widely used fossil fuel in various industrial productions. Its applications involve many industrial fields such as locomotives, coking, gasification and power generation, and it is also one of the main sources of electricity. At present, the most widely used method of coal resources is still combustion, and coal will produce a large amount of CO during the combustion process. 2 Greenhouse gas, sulfur in coal burns to form SO 2 Minerals form fly ash and enter the atmosphere as particulate pollutants. Therefore, a large amount of coal burning will cause serious pollution to the environment. With the massive consumption of coal resources year by year, high-quality coal resources with good combustibility and high calorific val...
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