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Rotary kiln start method

A technology of rotary kiln and kiln tail, applied in the field of rotary kiln start-up, can solve the problems of uneven heating, poor fluidity, blocked pipes, etc., and achieve the effect of reducing the use time, ensuring the service life and high tolerance rate

Inactive Publication Date: 2016-06-22
HUNAN CHUANGYUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the related art, the starting method of the rotary kiln is to use coal tar alone to start the kiln. The disadvantage is that it will cause waste of resources or even start-up failure after flameout due to poor fluidity or blockage of pipelines by impurities in the oil; It uses the flow of air to heat the rotary kiln, resulting in uneven heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for starting a rotary kiln is divided into four heating stages, including the following steps:

[0014] Step 1. In the first heating stage, ignite the kiln and heat the kiln head of the rotary kiln by injecting coal tar combustion. The first heating stage includes five stages of temperature rise - heat preservation - temperature rise - heat preservation - temperature rise, so that the rotary kiln can follow the set When the temperature of the rotary kiln is heated to 120°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 48 hours of heat preservation. When the temperature of the rotary kiln is heated to 240°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 48 hours of heat preservation. Until the temperature of the rotary kiln is heated to 300°C; the heating rate of the heating stage is 10°C / hour and the time of the single holding stage is longer than that of the single heating stage....

Embodiment 2

[0019] A method for starting a rotary kiln, comprising the steps of:

[0020] Step 1. In the first heating stage, ignite the kiln and heat the kiln head of the rotary kiln by injecting coal tar combustion. The first heating stage includes five stages of temperature rise - heat preservation - temperature rise - heat preservation - temperature rise, so that the rotary kiln can follow the set When the temperature of the rotary kiln is heated to 130°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 50 hours of heat preservation; when the temperature of the rotary kiln is heated to 250°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 50 hours of heat preservation Until the temperature of the rotary kiln is heated to 310° C.; the heating rate of the heating stage is 16° C. / hour and the time of the single holding stage is longer than that of the single heating stage.

[0021] Step 2. In the second heatin...

Embodiment 3

[0025] A method for starting a rotary kiln, comprising the steps of:

[0026] Step 1. In the first heating stage, ignite the kiln and heat the kiln head of the rotary kiln by injecting coal tar combustion. The first heating stage includes five stages of temperature rise - heat preservation - temperature rise - heat preservation - temperature rise, so that the rotary kiln can follow the set When the temperature of the rotary kiln is heated to 110°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 45 hours of heat preservation. When the temperature of the rotary kiln is heated to 230°C, stop the temperature rise and turn to heat preservation, and continue to heat up after 45 hours of heat preservation. Until the temperature of the rotary kiln is heated to 290°C; the heating rate of the heating stage is 6°C / hour and the time of the single holding stage is longer than that of the single heating stage.

[0027] Step 2. In the second heating st...

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PUM

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Abstract

The invention provides a rotary kiln starting method which includes the steps of firstly, igniting to bake a kiln, and using coal tar spraying combustion to heat the rotary kiln; secondly, adding petroleum coke to assist rotary kiln heating; thirdly, gradually reducing the supply of coal tar until the rotary kiln is heated only by the petroleum coke; fourthly, using the petroleum coke to heat the rotary kiln to the calcination temperature to complete rotary kiln starting. Compared with the prior art, the rotary kiln starting method is high in tolerance rate, free of equipment modification, and good and even in heat transfer effect, overall kiln baking time is reduced, and the service life of the rotary kiln is prolonged.

Description

【Technical field】 [0001] The invention relates to the field of anode carbon, in particular to a method for starting a rotary kiln. 【Background technique】 [0002] In the related art, the starting method of the rotary kiln is to use coal tar alone to start the kiln. The disadvantage is that it will cause waste of resources or even start-up failure after flameout due to poor fluidity or blockage of pipelines by impurities in the oil; It uses the flow of air to heat the rotary kiln, resulting in uneven heating. [0003] Therefore, it is necessary to provide a new method for starting the rotary kiln to overcome the above technical problems. 【Content of invention】 [0004] The technical problem to be solved by the present invention is to provide a stable and uniform heating method for starting the rotary kiln. [0005] A method for starting a rotary kiln is divided into four heating stages, including the following steps: [0006] Step 1. In the first heating stage, ignite th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/42
Inventor 卿中华谭有峰吴胜辉刘诚学
Owner HUNAN CHUANGYUAN NEW MATERIALS