Method for detecting temperature and negative pressure of dust falling chamber of carbon rotary kiln

Abstract

The invention relates to detection and control of process parameters of a dust falling chamber of a rotary kiln, in particular to a method for detecting temperature and negative pressure of a dust falling chamber of a carbon rotary kiln. The method comprises the following steps of: blocking an original measuring point interface, moving a temperature measuring element from the top of the dust falling chamber to an air seal ring at an entrance of the dust falling chamber to perform insertion, and extending a measuring end to a central position of the air seal ring; meanwhile, moving a temperature measuring element at an exit of the dust falling chamber to the upper part of a steel flue at an exit of the dust falling chamber to insertion, and selecting a temperature measuring point at the central position of an exit flue so as to solve the unreal phenomenon of measured data caused by position deviation of the temperature measuring point; moving a negative pressure sampling tube to the air seal ring fixed at the entrance of the dust falling chamber of the rotary kiln, and inserting the sampling tube to a half position of the center of the air seal ring; and meanwhile, moving a negative pressure detection point at the exit of the dust falling chamber to the upper part of the exit flue of the dust falling chamber, wherein the measuring point is at a half position of the center of the flue so as to fully meet the requirement of a production process on negative pressure detection.

Description

technical field [0001] The invention relates to the detection and control of process parameters in a dust-fall chamber of a rotary kiln, in particular to a method for detecting the temperature and negative pressure of the dust-fall chamber of a carbon rotary kiln. Background technique [0002] The carbon calcination process is to calcine the petroleum coke material through a rotary kiln, and roll it into a small kiln through two calcinations, and then send it to the forming raw material warehouse, and add other raw materials to make carbon blocks; After burning again, it will be emptied through the waste heat furnace for secondary utilization, so as to achieve the effect of environmental protection and energy saving. [0003] Temperature measurement: The temperature detection of the dust fall chamber is to insert a temperature measuring element with a length of 1.2 meters at the top of the entrance and exit of the dust fall chamber, and then display it on the secondary instr...

AI Technical Summary

Problems solved by technology

The pressure-measuring steel pipe inserted into the dust-fall chamber melts in a short period of time in the high-temperature state of the dust-fall chamber, resulting in a dead angle in the negative pressure detection of the dust-fall chamber. At this time, the collection of negative pressure detection values ​​cannot reflect the actual negative pressure value of the production process. The design did not consider the problem of the dead angle after the melting of the negative pressure point of the dust fall chamber, which caused the primary instrument to fail to accurately collect the negative pressure value of the dust fall chamber. At this time, the production technicians can only increase the air volume of the waste heat boiler induced fan To meet the negative pressure requirements of the dust-fall chamber, the increase in the induced air volume will inevitably increase the distribution air volume of the rotary kiln and the dust-fall chamber, which will cause the temperature of the rotary kiln and the dust-fall chamber to increase again, making the rotary kiln and the dust-fall chamber operate at high temperature. The service life of rotary kiln and dust drop chamber is shortened

This mode of operation firstly leads to the waste heat boiler induced air volume and rotary kiln gas volume waste. At the same time, the use of ultra-high temperature temperature measuring elements increases production costs, and the long-term high-temperature operation of the dust-fall chamber and rotary kiln shortens the service life.

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