Temperature measurement device for radiant tube of rotary kiln

Abstract

The invention provides a temperature measurement device for a radiant tube of a rotary kiln, and belongs to the technical field of temperature measurement. The device comprises a rotary kiln housing,the radiant tube, a temperature measurement conduit and a thermocouple, wherein the radiant tube is located in the rotary kiln housing, and is parallel to the central axis of the rotary kiln housing.The temperature measurement conduit passes through the rotary kiln housing, and the thermocouple is disposed in the temperature measurement conduit, and passes through the temperature measurement conduit along the axis. The temperature measurement conduit and the thermocouple are perpendicular to the radiant tube. The central axis of the temperature measurement conduit is tangent to the outer wallof the radiant tube. A temperature measurement probe of the thermocouple is guided by the temperature measurement conduit to make contact with the radiant tube. The device is simple and practical, and can accurately measure the temperature of the radiant tube in the rotary kiln.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and in particular relates to a temperature measurement device of a rotary kiln radiant tube. Background technique [0002] Measuring the temperature of objects, measuring the temperature of the rotary kiln space or fixed objects are all existing technologies, but it is difficult to measure the temperature of the radiant tube in the rotary kiln. The radiant tube is a mechanism for heating materials in the rotary kiln. From normal temperature to high temperature (such as 900 degrees), or from high temperature to normal temperature, accompanied by thermal expansion and contraction, several or dozens of temperature measuring devices are installed along the axis of the rotary kiln, especially from the fixed point of the radiant tube, the length From a distance of several meters, tens of meters, or even more than one hundred meters, a certain point on the radiant tube changes with tempe...

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Problems solved by technology

[0002] Measuring the temperature of objects, measuring the temperature of the rotary kiln space or fixed objects are all existing technologies, but it is difficult to measure the temperature of the radiant tube in the rotary kiln. The radiant tube is a mechanism for heating materials in the rotary kiln. From normal temperature to high temperature (such as 900 degrees), or from high temperature to normal temperature, accompanied by thermal expansion and contraction, several or dozens of temperature measuring devices are installed along the axis of the rotary kiln, especially from the fixed point of the radiant tube, the length From a distance of several meters, tens of meters, or even more than one hundred meters, a certain point on the radiant tube changes with temperature, compared with the corresponding point on the rotary kiln shell along the axis, the displacement changes greatly, and several Ten millimeters, or even hundreds of millimeters of displacement, if the thermocouple probe is fixed on the radiant tube, then the temperature measuring device fixed between the radiant tube and the shell of the rotary kiln is often damaged, and the temperature measurement work cannot be continued

[0003] The patent with the publication number CN203240885A discloses a temperature measuring device in a rotary kiln. It is made of a through hole in the rotary kiln shell, and an anti-oxidation heat-resistant steel that extends into the rotary kiln shell is installed on the through hole. The protective cover is connected with a thermocouple from the outside to the inside. However, this device can measure the temperature of a certain space in the rotary kiln, but it cannot measure the temperature of the radiant tube in the rotary kiln.

[0004] The patent with the publication number CN205119787U discloses a temperature measurement system in a rotary kiln, which includes: a fluorescent coating on the outer wall of the rotary kiln, a laser emitter, a fluorescent receiver, a spectrometer, a photoelectric multiplier hall, an image sensor, and a computer main control The units are connected sequentially by optical fiber, however, this device is not practical for rotary kilns with high temperature, dust and coal tar gas, because the dust and tar will block the laser

[0005] The patent with the publication number CN204705412U discloses a rotary kiln clinker temperature infrared measuring instrument device, which is installed on the side of the kiln hood, and is introduced into the channel through the opening of the kiln hood, and quartz glass is installed at the channel exit, and the optical path of the infrared measuring instrument passes through the quartz window. The temperature of the clinker is shot to the falling clinker at the exit, and then the temperature of the clinker is measured. The measurement accuracy is high. However, this device uses an infrared measuring instrument. It is inevitable that infrared light will be blocked

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