Method and device for measurement of concentration and flow of pulverized coal

A measurement method and pulverized coal technology are applied in the field of pulverized coal flow measurement and boiler pulverized coal concentration, which can solve problems such as inaccurate measurement of pulverized coal concentration.

Inactive Publication Date: 2012-07-11
SHANDONG ELECTRIC POWER RES INST +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of inaccurate measurement of pulverized coal concentration in the prior art; to provide a method and device for measuring pulverized coal concentration and flow of pulveriz

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  • Method and device for measurement of concentration and flow of pulverized coal
  • Method and device for measurement of concentration and flow of pulverized coal
  • Method and device for measurement of concentration and flow of pulverized coal

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the drawings and embodiments.

[0037] Measurement method of pulverized coal concentration and pulverized coal flow, combined figure 1 , figure 2 In the figure, the primary air duct 4, measuring point I14, measuring point II15, and measuring point III16 include the following steps:

[0038] 1) On the primary air duct 4, select the air flow parameter measurement point I 14 before the powder conveying air flow and the pulverized coal are mixed, and the mixed air flow parameter measurement point II15. The air flow parameter measurement point I14 before the mixing is set at the pulverized coal and air will be mixed. Before the air flow is stable, the mixed air flow parameter measuring point II 15 is set at the point where the speed of the pulverized coal particles reaches the air flow velocity after the mixing point, and the measuring point II15 is used as the starting point to determine the flow pressur...

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Abstract

The invention discloses a method and a device for measurement of concentration and flow of pulverized coal, which includes steps: firstly, selecting flow parameter measuring point I before mixing of pulverized coal conveying air flow with pulverized coal and flow parameter measuring point II after mixing on a primary air pipeline, wherein the flow parameter measuring point I before mixing is arranged at a flow stable position before mixing of the pulverized coal with air, and the flow parameter measuring point II after mixing is arranged at a position where the pulverized coal speed reaches the flow speed after mixing; determining flow pressure drop measurement pipe section L on a horizontal straight pipeline; and arranging static pressure measuring points for measuring pressure drop of the pipe section at two ends of the pipe section L; secondly, measuring static pressure P1, temperature T1 and full pressure P before mixing; thirdly, measuring static pressure P2 and pressure drop delta PLD; fourthly, calculating flow density 1 before mixing; fifthly, calculating flow speed V1 before mixing, sixthly, calculating pulverized coal concentration mu; and seventhly, calculating pulverized coal flow MP.

Description

Technical field [0001] The invention relates to the technical field of boiler pulverized coal concentration and pulverized coal flow measurement technology, in particular to a method and a measuring device for measuring pulverized coal concentration and pulverized coal flow. Background technique [0002] The distribution of pulverized coal among the burners of a pulverized coal boiler directly affects the safety and economy of the operation of the boiler equipment, and also has an important impact on the nitrogen oxide emission level of the coal-fired boiler. Measuring the concentration of pulverized coal in the primary air duct is an important means to monitor the operation of the burner. For pulverized coal boilers using an intermediate storage pulverized coal system, people used to measure the air flow and temperature before and after the pulverized coal conveyed air and the pulverized coal are mixed, and calculate the pulverized coal concentration in the primary air-pulverize...

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Application Information

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IPC IPC(8): G01F1/34G01N7/00
Inventor 杨兴森董信光侯凡军崔福星
Owner SHANDONG ELECTRIC POWER RES INST
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