Top temperature control method for vertical co-firing lime kiln

A control method and lime kiln technology are applied in the field of top temperature control of a vertical mixed-burning lime kiln, which can solve the problems of insufficient consideration of the influence of air intake, unstable control effect, fluctuation of production load, etc., so as to improve the accuracy and Timeliness, optimized control, stable effect of calcination zone

Inactive Publication Date: 2020-04-14
ZHEJIANG SUPCON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 extensi

Method used

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  • Top temperature control method for vertical co-firing lime kiln
  • Top temperature control method for vertical co-firing lime kiln
  • Top temperature control method for vertical co-firing lime kiln

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Specifically, the embodiment of this application proposes a top temperature control method for a vertical mixed-fired lime kiln, such as figure 1 shown, including:

[0066] 11. Construct the top temperature control function with the kiln bottom air volume adjustment in the vertical mixed-fired lime kiln as the adjustment object;

[0067] 12. Periodically monitor the change of top temperature in the vertical mixed-fired lime kiln, and adjust the air volume at the bottom of the kiln according to the historical value of the top temperature combined with the constraints of the air volume step.

[0068] In practice, the present invention is mainly used for the top temperature control of the vertical mixed-fired lime kiln in the industrial production process. According to the production process data such as the lime kiln top temperature, material loading (limestone), and kiln bottom air intake, combined with the kiln working conditions, the lime kiln top temperature is finel...

Embodiment 2

[0125] In the first embodiment, the control method for calculating the air intake at the bottom of the kiln based on the change of the top temperature is given to realize the control of the top temperature. The air intake is calculated in order to realize the control method of top temperature control.

[0126] Specifically include:

[0127] 131. Periodically monitor the amount of stone loaded in the vertical mixed-fired lime kiln, and calculate the change in the amount of stone loaded at the current moment and the previous moment;

[0128] 132. Calculate the adjustment value of the kiln bottom air volume matching the load change according to the change value of the stone loading amount.

[0129] Wherein, the adjustment value of air volume at the bottom of the kiln according to the change value of the stone loading amount proposed in step 132 is calculated to match the load change, including:

[0130] The control method proposed in this example is based on the adjustment meth...

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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...

Claims

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Application Information

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IPC IPC(8): C04B2/12
CPCC04B2/12
Inventor 陈武金晓明
Owner ZHEJIANG SUPCON TECH
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