Top temperature control method for vertical co-firing lime kiln

Abstract

The embodiment of the invention provides a top temperature control method for a vertical co-firing lime kiln. The top temperature control method comprises the following steps: constructing a top temperature control function by taking the kiln bottom air volume adjustment amount in a vertical co-firing lime kiln as an adjustment object; and adjusting the kiln bottom air volume according to change conditions, wherein the change conditions specifically comprise top temperature change and stone feeding amount change, wherein PID dynamic adjustment is performed based on temperature change and kilnconditions, dynamic adjustment of an air volume adjustment coefficient is performed according to the stone feeding amount change and the kiln conditions, and finally the kiln bottom air inlet volume is obtained through calculation so as to achieve fine control of the top temperature of the lime kiln. According to the method, the accuracy and the timeliness of lime kiln top temperature control canbe improved, the optimal control over the lime kiln top temperature is achieved, and the lime kiln calcining area is stabilized, so that the lime kiln calcining quality is improved, and coke consumption is reduced.

Description

technical field [0001] The invention belongs to the field of temperature control, in particular to a top temperature control method for a vertical mixed-fired lime kiln. Background technique [0002] The production process of the vertical mixed-fired lime kiln consists of three parts: raw material feeding, air entering the kiln, and calcination and ash output. [0003] Batching and feeding: limestone and coke are mixed according to the proportion and put into the hanging stone bucket, lifted to the top of the kiln by the hoist and sprinkled into the kiln. The production cycle of the lime kiln is 1 hour, and the amount of stone loaded in 1 hour is the production load of the lime kiln; [0004] Air enters the kiln: the air enters the kiln through the air duct at the bottom of the kiln through the blower, and the air intake can be adjusted by the frequency converter; [0005] Calcination ash: Limestone is calcined in the kiln for 18-24 hours, preheated, calcined, and cooled to...

AI Technical Summary

Problems solved by technology

[0012] 1. The above stone quantity is used as the main adjustment method, which is easy to cause fluctuations in production load

[0013] 2. The adjustment is relatively extensive and not fine enough

[0014] 3. The influence of air intake is not fully considered

[0015] 4. It is mainly manually adjusted by the operator, and the control effect is unstable

Images