Cement vertical kiln calcination temperature and its corresponding deepness center insertion measuring device

Abstract

The invention relates to concrete vertical kiln burning temperature and its corresponding depth centered insertion measuring device. It includes centered insertion probe, probe drive gear, electric control cabinet, electromotor, and power supply. Its features are that the probe is set thermocouple; the probe drive gear is motive mechanical drive for centre gripping probe component; the electric control cabinet includes electromotor positive and negative rotating control circuit component, depth display control instrument, temperature display control instrument, and depth transducer which is connected with depth display control instrument and mechanical drive gear; thermocouple is connected with temperature display control instrument; the electromotor positive and negative rotating control circuit component is respectively connected with temperature and depth display control instruments, electromotor and power supply. Its advantages are that it can realize contacting type continuous measurement for vertical kiln center burning temperature and its corresponding depth, supply exact data timely, guide the production rightly, and improve concrete clinker quality.

Description

technical field [0001] The invention relates to the measurement of the calcining temperature and depth of a cement kiln, in particular to a central insertion measuring device for the calcining temperature and corresponding depth of a cement vertical kiln. Background technique [0002] Cement shaft kiln is a cylindrical vertical calcination continuous production device. Fuel and materials are uniformly mixed to make balls, which are sprinkled into the kiln from the top of the kiln. The balls move from top to bottom by their own weight and are discharged at the bottom of the kiln; air for combustion is blown into the kiln from the bottom of the kiln, It passes through countercurrent and is discharged from the kiln roof. The material calcination process, from top to bottom, consists of six stages: drying, preheating, decomposition, solid phase reaction, firing and cooling. The temperature increases gradually in the first five stages, reaching the highest temperature of 1450°C...

AI Technical Summary

Problems solved by technology

The existing cement shaft kiln material combustion temperature and its corresponding depth measurement are mostly set up two sets of circularly distributed thermocouples in the refractory bricks of the kiln body, and judge according to the temperature of the refractory bricks fed back by the thermocouples and the height of the bricks. The calcination temperature and corresponding depth of the material in the kiln, but because the temperature of the material is different from the periphery to the center on the same level in the kiln, this measurement method cannot accurately reflect the temperature and depth of the material in the center of the kiln, and cannot grasp the calcination zone. True shape, resulting data cannot be used to guide production

At present, there are also devices that measure from the center of the shaft kiln. For example, in the patent ZL200320125783.3 "Cement Shaft Kiln Firing Zone Center Insertion Measurement Device" provides a free-fall method that directly inserts a steel probe from the center of the shaft kiln to penetrate the kiln. It is a device for measuring the position of the primer by automatically lifting the probe to reset it until the material is fired with a hard bottom. This device can directly obtain the measurement data of the shaft kiln center, but it is limited to the measurement of a single parameter (depth), and it is a method for measuring the position of the bottom fire during the calcination process. The measurement of the depth of a specific stage (sintering zone) cannot reflect continuous and complete measurement data because it is intermittent and instantaneous. Once the process is adjusted according to the test results, the test verification needs to be inserted again. The entire operation process is not intuitive and consumes a lot of time. Time, its real-time tracking, poor operability and guidance, especially the need to stop the material to measure, directly affects the production stability of the cement shaft kiln, but has a negative impact on the product quality

So up to now, how to realize accurate real-time measurement, scientifically control the production of cement shaft kiln, prevent kiln accidents caused by the position of the primer higher than the interface or radial shrinkage cracks below the interface, and improve the quality of clinker products are still the industry's attention.

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