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Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism

A crank-slider mechanism and swirl burner technology are applied in measuring devices, temperature measurement of moving fluids, heat measurement, etc., which can solve problems such as lack of basis for adjusting the air distribution of burners, and ensure combustion stability and prevent The effect of burning loss and preventing fire

Pending Publication Date: 2020-12-18
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When the traditional swirl burner organizes pulverized coal to burn, since it is not equipped with a measuring device for the ignition distance of the pulverized coal, the adjustment of the air distribution of the burner is generally based on the recommended value from experience or visually measuring the ignition distance of the pulverized coal through the burner, lacking the adjustment of the air distribution of the burner in accordance with

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  • Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism
  • Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism
  • Swirl burner pulverized coal ignition distance measuring device based on slider-crank mechanism

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] The ignition process of the pulverized coal flow in the utility boiler is roughly divided into three stages, which are the preparation stage before ignition, the combustion stage and the burnout stage, and the whole process is completed within about 2 seconds. The lowest temperature corresponding to when the pulverized coal starts to ignite is called the pulverized coal ignition temperature, and the engineering definition is greater than 800°C as the pulverized coal ignition temperature. Generally, the pulverized coal flow at the outlet of the swirl burner catches fire at about 300mm to 500mm away from the burner, and it should not exceed 500mm, but it should not be lower than 300mm.

[0034] The crank, connecting rod, and tie rod form the crank slider mechanism, and the motion state of each component is described when the crank rotates 360° clockwise....

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Abstract

A swirl burner pulverized coal ignition distance measuring device based on a slider-crank mechanism comprises a centering slider-crank mechanism and a sleeve, the sleeve is arranged in a central air duct of a swirl burner and can move along the central air duct, one end of the sleeve is connected with the slider-crank mechanism, and a plurality of thermocouples are evenly arranged at the other endof the sleeve in the circumferential direction. The centering slider-crank mechanism comprises a crank, a connecting rod and a pull rod, one end of the crank is connected with the connecting rod, theconnecting rod is connected with the pull rod, and a displacement sensor is arranged on the pull rod. By arranging the slider-crank mechanism, the crank rotates to drive the sleeve provided with thethermocouple to reciprocate circularly, the temperature of the nozzle of the burner can be tested flexibly on line, and the ignition distance of pulverized coal airflow at the outlet of the burner ismeasured through the displacement sensor, so that an operator can carry out air distribution optimization and adjustment work in real time, and the combustion stability of the burner can be ensured.

Description

technical field [0001] The invention belongs to the field of boiler burners for coal-fired power plants, and in particular relates to a coal powder ignition distance measuring device for swirl burners based on a crank slider mechanism. Background technique [0002] The main function of the burner of coal-fired power plant boiler is to organize the sufficient mixing of fuel and air, timely ignition and stable combustion. According to the fluidity of the outlet airflow, it can be divided into straight-flow burners and swirl burners. The outlet jet of the direct-flow burner is a non-rotating direct-flow jet, which is generally arranged as a four-corner tangential combustion method; the outlet jet of the swirl burner rotates while moving forward in a spiral motion, and is generally arranged as a wall-type hedging combustion method. The swirl burner is composed of a central air nozzle, a pulverized coal nozzle, an inner secondary air channel, and an outer secondary air channel. ...

Claims

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Application Information

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IPC IPC(8): G01K7/02G01K13/02G01K1/14G01B21/02
CPCG01B21/02G01K1/146G01K7/02G01K13/02
Inventor 杨辉杨珍党小建刘超党黎军张宇博沈植
Owner XIAN THERMAL POWER RES INST CO LTD
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