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Low-temperature control process for oven baking of annular sleeve kiln

A technology of annular sleeve and oven, applied in the field of temperature control of annular sleeve kiln, can solve difficult temperature control requirements and other problems, achieve the effects of reducing control difficulty, easy implementation, and guaranteed baking quality

Active Publication Date: 2014-03-26
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual operation process, the original oven control method provided by the foreign party is difficult to achieve the temperature control requirement below 350 ° C. Generally, the temperature rises directly to 350-400 ° C after ignition, and the temperature rise gradient exceeds 15 ° C / h

Method used

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  • Low-temperature control process for oven baking of annular sleeve kiln

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Concrete operating method of the present invention comprises the steps:

[0021] (1) Turn on the cooling fan, high temperature fan, drive fan and other equipment, and the combustion chamber has the ignition conditions;

[0022] (2), the discharge speed is controlled at 90 seconds;

[0023] (3) Adjust the driving air pressure to 12-15kpa, adjust the high-temperature fan speed, control the negative pressure of the lower combustion chamber at about -100~-50pa, and control the lime cooling air volume at 4800-5200m / h;

[0024] (4) Control the individual air volume of the lower burner at 140-160 m / h, open the gas valve, manually adjust the gas flow after the burner is ignited successfully, and control the flame to the minimum, so that no flame can be seen from the observation hole of the burner panel, and only faint light can be seen as the standard;

[0025] (5) Observe the rise of the lower combustion chamber, and always keep the negative pressure of the lower combus...

Embodiment 2

[0028] The rest of the steps are the same as in Example 1, the difference lies in the temperature rise method in the low temperature zone of the lower combustion chamber. If the adjustment accuracy cannot be achieved on site, the gas volume can be increased by adjusting the gas manual valve and the temperature rise gradient can be reduced by increasing the lime cooling air volume. To achieve, the lime cooling air volume should not exceed 7000m3 / h.

[0029] The low-temperature control process of the annular sleeve kiln oven of the present invention effectively meets the current domestic sleeve kiln’s temperature requirements for refractory baking when the oven is put into operation, and makes up for the fact that the oven control method provided by the foreign party cannot match the domestic refractory baking temperature. Requirements to match the drawbacks. The control of key parameters by this process control method avoids the phenomenon of large temperature fluctuations caus...

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Abstract

The invention discloses a low-temperature control process for oven baking of an annular sleeve kiln. Equipment such as an opening cooling fan and the like is included. A combustion chamber has ignition conditions as follows: the discharging speed is controlled to be 90 seconds; driving air pressure is adjusted to be 12-15 kpa, the revolving speed of a high temperature fan is adjusted, the negative pressure of a lower combustion chamber is controlled to be about minus 100-50 pa, and the lime cooling air volume is controlled to be 4800-5200 m<3> / h; the single air volume of a lower burner is controlled to be 140-160 m<3> / h, a gas valve is switched on, the gas flow is manually adjusted after the burner is successively ignited, the fire is controlled to be the minimum, the temperature rising condition of the lower combustion chamber is observed, and the negative pressure of the lower combustion chamber is kept to be about minus 100-50 pa constantly, and after the temperature of the lower combustion chamber tends to be stable and the temperature is maintained to be about 50-80 DEG C, the temperature rises according to a temperature rise curve. According to the control process, operation steps are clear and easy to implement, and the control difficulty of an operator in an oven baking process is effectively reduced.

Description

technical field [0001] The invention relates to a temperature control method for an annular sleeve kiln, in particular to a low temperature control process for an annular sleeve kiln oven. Background technique [0002] Annular sleeve kiln is an important tool for calcining lime. It has the characteristics of low heat consumption, high lime activity, simple structure and strong fuel adaptability. Compared with traditional lime kiln, lime is calcined in the annular space, and the airflow The distribution is more uniform, there is no cooling equipment in the kiln, the failure rate is low, and it is easy to maintain. It is suitable for the iron and steel industry to use coke oven gas and calcium carbide, and the chemical industry to use calcium carbide furnace tail gas to produce high-quality lime. [0003] According to the current use of the annular sleeve kiln, it needs to be overhauled every 4-5 years. After each overhaul, the new refractory needs to be baked before use....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
Inventor 鲍亮亮郭占军蔡昌旺
Owner NANJING MEISHAN METALLURGY DEV
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