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Method for measuring temperature of rotary cement kiln and method and device for online detection of temperature field of rotary cement kiln

A cement rotary kiln and measurement method technology, applied in the direction of measuring devices, thermometers, thermometer applications, etc., can solve the problems of inability to accurately measure high Ca-based solid phase gas phase temperature, etc., achieve wide application range, simple equipment, and reduce NOx emissions Effect

Active Publication Date: 2014-02-05
北京汉能清源科技有限公司
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a cement rotary kiln temperature measurement method and an online temperature field detection method and device, the purpose of which is to accurately measure the flame temperature field in the furnace on-line, thereby solving the problem of the existing cement rotary kiln. The online field measurement method of the flame temperature in the rotary kiln cannot accurately measure the high Ca-based solid phase and high CO in the furnace 2 Technical issues with gas phase temperature

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  • Method for measuring temperature of rotary cement kiln and method and device for online detection of temperature field of rotary cement kiln
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  • Method for measuring temperature of rotary cement kiln and method and device for online detection of temperature field of rotary cement kiln

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0050] The method for measuring the temperature of a cement rotary kiln provided by the invention includes two parts: off-line calibration and on-line detection.

[0051] The offline calibration part includes the following steps:

[0052] (a1) Calculation of the absorption coefficient of the solid-phase Ca-based dispersion medium.

[0053] In the cement rotary kiln used for calibration, the ra...

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Abstract

The invention discloses a method for measuring the temperature of a rotary cement kiln and a method and device for online detection of the temperature field of the rotary cement kiln. The method for measuring the temperature of the rotary cement kiln comprises the steps that an offline calibration portion establishes a mapping relational table of gas phase each-component gas-solid absorption coefficient correction coefficients and the temperature by considering gas-solid two-phase radiation characteristics inside the rotary cement kiln; an online detection portion selects one set of gas-solid absorption coefficient correction coefficients from the mapping relational table obtained by the offline calibration portion by testing monochrome radiation intensity and gas phase component molar volume quotients, so that the calculated theoretical monochrome radiation intensity and the detected actual monochrome radiation intensity are closest, and the corresponding temperature is the temperature to be measured. The invention further discloses the method and device for online detection of the temperature field of the rotary cement kiln by applying the method for measuring the temperature. According to the method for measuring the temperature of the rotary cement kiln and the method and device for online detection of the temperature field of the rotary cement kiln, the measuring result is accurate, the temperature field inside the rotary cement kiln can be globally analyzed, excessive temperature of materials of a burning zone and deteriorating combustion conditions are avoided, and heating-power-type NOx emission caused by the excessively-high temperature is reduced.

Description

technical field [0001] The invention belongs to the field of cement rotary kiln temperature control, and more specifically relates to a cement rotary kiln temperature measurement method and an online temperature field detection method and device. Background technique [0002] The temperature field distribution in the cement rotary kiln is of great significance to the combustion efficiency of the rotary kiln and the pollutant emission of thermal NOx. On the premise of ensuring the quality of cement clinker, the combustion adjustment technology based on the controllable temperature field has always been the key technology restricting the development of the cement industry at home and abroad. [0003] A method for continuous temperature measurement of a cement rotary kiln is disclosed in Chinese Utility Model Patent Specification CN95216824. This method mainly uses a contact-type high-temperature thermocouple to measure the temperature at a certain point in the rotary kiln. I...

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Application Information

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IPC IPC(8): G01K13/00
Inventor 陈东林张欣禹张昊刘富刚张永谋
Owner 北京汉能清源科技有限公司
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