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System and method for measuring pulverized coal concentration and speed deviation of boiler pulverized coal pipeline

A technology of pulverized coal pipeline and speed deviation, applied in the field of electric power, can solve the problems of poor sensitivity and low measurement accuracy, and achieve the effect of high reliability

Pending Publication Date: 2021-12-03
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the ultrasonic method, it is easily disturbed by the complex measurement environment, the measurement accuracy is low, and the sensitivity is poor

Method used

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  • System and method for measuring pulverized coal concentration and speed deviation of boiler pulverized coal pipeline
  • System and method for measuring pulverized coal concentration and speed deviation of boiler pulverized coal pipeline

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] ginseng figure 1 , figure 2 As shown, this embodiment provides a system for measuring the pulverized coal concentration and velocity deviation of the boiler pulverized coal pipeline, including a mixing unit and a measuring unit;

[0025] The mixing unit includes a luminous powder powder drop pipe 3 for connecting with the coal drop pipe 4 (holes are opened on the coal drop pipe). An adjustment door 2 for adjusting the amount of falling powder, and a lighting device for the luminescent powder to absorb light is arranged in the luminescent powder silo 1;

[0026] The measuring unit includes a section of transparent pipe 6 arranged on the primary powder pipe 5 (a s...

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Abstract

The invention relates to a system and a method for measuring pulverized coal concentration and speed deviation of a boiler pulverized coal pipeline. The system comprises a mixing unit and a measuring unit. The mixing unit comprises a luminous powder falling pipe used for being connected with the coal falling pipe, the luminous powder falling pipe is connected with a luminous powder bin, the luminous powder bin is provided with an adjusting door used for adjusting the powder falling amount, and a lighting device used for light absorption of luminous powder is arranged in the luminous powder bin. The measuring unit comprises a section of transparent pipeline arranged on the primary powder pipe, high-speed cameras are arranged on the periphery of the outer side of the transparent pipeline, and the high-speed cameras are connected with the control module and the image processing unit. The flow and flow velocity of the pulverized coal airflow can be accurately measured by using one set of equipment under the condition that the pulverized coal airflow is not contacted, and the reliability is relatively high. And after the flow, namely the flow velocity, of the pulverized coal airflow is measured, an operator can adjust the flow and the flow velocity of each branch pulverized coal pipe according to a measurement result, so that safe and stable operation of the boiler is ensured.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a system and method for measuring the pulverized coal concentration and velocity deviation of a boiler pulverized coal pipeline. Background technique [0002] In the pulverized coal boiler of the power station, the primary wind carries the pulverized coal through the primary powder tube into the boiler for combustion. Since several primary powder pipes corresponding to the same pulverizer have different orientations and thus have different resistances, there will be deviations in the flow velocity and flow rate of the pulverized coal airflow in each pulverized pipe, which will lead to deflection of combustion in the furnace and further cause A series of problems such as uneven internal heat load, insufficient pulverized coal combustion, overheating of the heating surface, etc., and the natural phenomenon of powder accumulation in the primary powder pipe due to the low flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 赵斯楠
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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