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Optimization control method of temperature gradient inside rotary kiln

A gradient optimization, internal temperature technology, applied in rotary drum furnaces, furnaces, lighting and heating equipment, etc., can solve problems such as uneven temperature distribution, and achieve the effect of stabilizing product quality and reducing fuel consumption

Active Publication Date: 2015-02-11
北京和隆优化科技股份有限公司
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Problems solved by technology

[0004] The problem to be solved by the present invention is to invent a method for optimizing the temperature gradient in the rotary kiln, which solves the problem of uneven temperature distribution in the rotary kiln, achieves ideal temperature control in the kiln as a whole, reduces fuel consumption, and stabilizes product quality

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  • Optimization control method of temperature gradient inside rotary kiln

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Embodiment Construction

[0011] The raw material flow rate F1 is used as the input of the fuel flow setter, and the output of the setter is a function of the input variable F1, which is set according to the design data or operating experience; △T12 is the temperature difference between the kiln head and the kiln tail, △T12SP is the setting value of the temperature difference controller at the kiln head and kiln tail, T2SP and T2 are the setting value and measured value of the kiln tail temperature controller respectively, the output of the fuel flow setter and the output of the temperature difference controller at the kiln head and kiln tail, and the kiln tail The temperature controller outputs the sum of the three as the set value of the fuel flow controller, and the fuel flow F2 as the measured value of the fuel flow controller. Each controller adopts the PID control algorithm to realize the closed-loop control of the fuel flow; the kiln head kiln The value range of the ratio P of the tail temperatur...

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Abstract

The invention relates to an optimization control method of temperature gradient inside a rotary kiln. The closed-ring control of the negative pressure in the kiln is realized according to the change in temperature of a kiln tail and the temperature change rate, and the closed-ring control of the air flow is realized according to the negative pressure and the load. The optimization control method effectively solve the quality problems of products caused by unreasonable distribution of the temperature field in the rotary kiln, and the fuel insufficient combustion problems caused by unreasonable temperature gradient in the rotary kiln, so as to reduce the fuel consumption and stabilize the quality of the products.

Description

technical field [0001] The invention relates to the technical field of industrial rotary kiln control, in particular to a method for optimizing the temperature gradient inside the rotary kiln. Background technique [0002] Rotary kiln is an important process equipment in metallurgy, building materials, cement and other industries. The rotary kiln process device usually includes multi-stage cyclone preheater, rotary kiln and cooler and other equipment. It is a continuous rotating cylindrical kiln body placed at an angle. From the kiln tail to the kiln head, it is divided into three temperature zones, namely the preheating zone, the calcining zone and the cooling zone. Since different materials have different process requirements for the length and temperature of preheating zone, calcination zone and cooling zone, which are directly related to product output, quality, raw material consumption and cost, etc., therefore, temperature control in the rotary kiln is very important....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/42
Inventor 于现军王孝伟
Owner 北京和隆优化科技股份有限公司
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