Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content

A flue gas oxygen content and monitoring device technology, applied in sampling devices and other directions, can solve problems such as shortening the service life of equipment, insufficient sampling representativeness, inaccurate measurement data, etc., to ensure long-term reliable use, compact structure, and reliable operation. Effect

Inactive Publication Date: 2015-08-19
苏靖 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

This method has problems such as insufficient sampling representativeness, the fly ash in the flue is easy to block the conduction hole, and the oxygen meter is easy to wear and tear, which easily leads to inaccurate measurement data and shortens the service life of the equipment.

Method used

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  • Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content
  • Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content

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Embodiment Construction

[0018] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0019] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature relative to another element or feature shown in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described ...

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Abstract

The invention discloses an gas-exhaust-type online monitoring method for oxygen content. A bypass is arranged on the outer side of a flue and is used for connecting flues in front of or behind a coal economizer or an air preheater; air current is educed out of the flues by means of the pressure difference between the a front flue and the a rear flue; after the air current is subjected to ash removing by a cyclone separator, the oxygen content in the air current is online measured by an oxygen meter, and separated fly ash is fed back to the flues; the air current is automatically educed out of the flues by using the pressure difference between the front part and the rear part of the coal economizer or the air preheater in each flue, and the oxygen content is monitored outside the flues. The invention also provides a gas-exhaust-type online monitoring device for the oxygen content, which is used for realizing the method.

Description

technical field [0001] The invention relates to an on-line monitoring method for measuring the oxygen content of flue gas of a boiler, and an on-line monitoring device for the flue gas content. Background technique [0002] The oxygen content in flue gas of coal-fired boilers in thermal power plants is also called the excess air coefficient, which is an important indicator to measure the operation and combustion efficiency of boilers. Reasonable control of the oxygen content of boiler flue gas is conducive to improving the economy of boiler and generator set operation. At present, thermal power plants generally use electrochemical methods for measurement, and the zirconia oxygen meter is directly inserted in the flue for monitoring. This method has problems such as insufficient sampling representativeness, easy blockage of conduction holes by fly ash in the flue, and easy wear and tear of the oxygen meter, which easily leads to inaccurate measurement data and shortens the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
Inventor 苏靖单茂祥
Owner 苏靖
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