Nozzle wind speed measurement system and method suitable for cold state test of pulverized coal burner

A technology of pulverized coal burner and wind speed measurement, which is applied in the direction of measuring fluid speed by pressure difference, can solve the problems of inconvenient maintenance or adjustment, deviation of measurement results, complicated measurement device, etc., to avoid test work, reliability and accuracy. High, improve the effect of operating reliability

Active Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0011] From the above analysis, it can be seen that the measurement of the burner nozzle wind speed can effectively judge and analyze the thermal combustion status of the boiler, but the current field measurement by the testers into the furnace has harsh environment and high labor intensity for the testers. However, some existing me

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  • Nozzle wind speed measurement system and method suitable for cold state test of pulverized coal burner
  • Nozzle wind speed measurement system and method suitable for cold state test of pulverized coal burner
  • Nozzle wind speed measurement system and method suitable for cold state test of pulverized coal burner

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Embodiment

[0062] The #3 boiler in a power plant of Huadian Group is a subcritical, intermediate reheating, forced circulation drum boiler with an evaporation capacity of 1025t / h. The air nozzles are arranged at intervals, and the pulverizing system is a direct blowing type equipped with 6 medium-speed coal mills. The boiler burner adopts the early American CE technology, and the NOx emission concentration is relatively high. In order to meet the latest national pollutant emission standards for thermal power plants, the low-nitrogen burner is modified. The structure and layout of the modified burner are shown in Figure 7 , after the transformation was completed, an intelligent nozzle wind speed measurement system was used during the cold test.

[0063] In the process of boiler overhaul, the power plant adopts the lifting platform 1 to ensure a faster construction progress in the furnace to facilitate the up and down construction in the furnace and to ensure higher construction safety (c...

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Abstract

The invention discloses a nozzle wind speed measurement system and method suitable for a cold state test of a pulverized coal burner. The nozzle wind speed measurement system comprises a nozzle wind speed measurement device, a data collection and data processing system and a mobile platform system; a wing-shaped wind measurement element of the nozzle wind speed measurement device is used for sending measured signals to a multi-channel integrated micro pressure transmitter of the data collection and data processing system through a connecting pipe; the multi-channel integrated micro pressure transmitter is used for sending the signals to a distributed data collection plate; a cursor sensor which is arranged in the mobile platform system is used for sending measured signals to the distributed data collection plate; the distributed data collection plate is used for sending the data to a data collection instrument for data processing in a unified mode and transmitting the data to a computer for further processing; the computer is used for sending an instruction to a lifting platform controller of the mobile platform system. According to the nozzle wind speed measurement system and method suitable for the cold state test of the pulverized coal burner, the all-around automatic measurement, recording and data processing on the nozzle wind speed in the cold state test is achieved and the high-strength and dangerous test work of testers in the harsh test environment is completely avoided.

Description

technical field [0001] The invention relates to an intelligent nozzle wind speed measurement system and method suitable for the cold state test of a pulverized coal burner. Background technique [0002] Among the various power generation methods in our country, coal-fired thermal power generation is still the main one. Among the main units of 300MW and 600MW, the boilers of most units adopt the tangential combustion method. [0003] For large utility boilers with tangential combustion, the measurement of nozzle wind speed before hot start is a time-saving, labor-saving and efficient test method, which can be used to determine the uniformity of air distribution in the boiler combustion system; The air volume characteristics of the damper baffle; determine the fluid dynamic characteristics of the burner; understand the mixing of primary and secondary air, etc. However, the commonly used test method at present is: the tester uses a hand-held anemometer to measure the nozzle wi...

Claims

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Application Information

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IPC IPC(8): G01P5/14
Inventor 董信光胡志宏郝卫东崔福兴刘豪杰
Owner STATE GRID CORP OF CHINA
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