Oven-drying working process for coke dry quenching system

A technology of CDQ and CDQ, which is applied in the oven process field of CDQ system, can solve the problems of cracking of refractory materials, inability to timely and accurately judge the drying condition of CDQ, and temperature rise, etc., so as to prolong the service life , The effect of shortening the start-up time of the oven

Active Publication Date: 2012-01-04
CHONGQING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. In the warm air drying stage, due to the large difference between the water temperature of the boiler header and the temperature of the steam drum, the boiler system trembles, and it is easy to damage the boiler and cause steam to mix into the drying air, so that it is impossible to judge the drying of the CDQ furnace in a timely and accurate manner...

Method used

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  • Oven-drying working process for coke dry quenching system
  • Oven-drying working process for coke dry quenching system
  • Oven-drying working process for coke dry quenching system

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: As shown in the figure, the CDQ system oven start-up process includes the following steps:

[0027] Step 1, warm air drying CDQ furnace,

[0028] Step 2, after step 1 is finished, carry out gas drying CDQ,

[0029] Step 3. After step 2 is completed, put red coke into the CDQ furnace to raise the temperature of the refractory material to 1050°C at a rate of 30°C / h, and complete the oven operation. During this process, nitrogen gas is continuously fed into the CDQ furnace Replace the combustible gas in the furnace, and replace the combustible gas to avoid the explosion hazard caused by the accumulation of combustible gas; put in red coke to heat up the CDQ furnace, and transfer the test data before the official work of the CDQ furnace to ensure the smooth operation of the CDQ furnace Carry out; of course, in specific implementation, the heating rate of the refractory material in this step can also be other values ​​within the range of <30°C / h, and the final...

Embodiment 2

[0039]Embodiment 2: As shown in the figure, the CDQ system oven start-up process includes the following steps:

[0040] Step 1, warm air drying CDQ furnace,

[0041] Step 2, after step 1 is finished, carry out gas drying CDQ,

[0042] Step 3. After step 2 is completed, put red coke into the CDQ furnace to raise the temperature of the refractory material to 1000°C at a rate of 25°C / h to complete the oven operation. During this process, nitrogen gas is continuously fed into the CDQ furnace Replace the combustible gas in the furnace, and replace the combustible gas to avoid the explosion hazard caused by the accumulation of combustible gas; put in red coke to heat up the CDQ furnace, and transfer the test data before the official work of the CDQ furnace to ensure the smooth operation of the CDQ furnace conduct;

[0043] Described step 1 comprises the following operations:

[0044] a. The air is passed into the boiler, and the boiler uses low-pressure steam to heat the air, and...

Embodiment 3

[0052] Embodiment 3: As shown in the figure, the CDQ system oven start-up process includes the following steps:

[0053] Step 1, warm air drying CDQ furnace,

[0054] Step 2, after step 1 is finished, carry out gas drying CDQ,

[0055] Step 3. After step 2 is completed, red coke is loaded into the CDQ furnace to raise the temperature of the refractory material to 950°C at a rate of 20°C / h, and the oven operation is completed. During this process, nitrogen gas is continuously fed into the CDQ furnace Replace the combustible gas in the furnace, and replace the combustible gas to avoid the explosion hazard caused by the accumulation of combustible gas; put in red coke to heat up the CDQ furnace, and transfer the test data before the official work of the CDQ furnace to ensure the smooth operation of the CDQ furnace conduct;

[0056] Described step 1 comprises the following operations:

[0057] a. The air is passed into the boiler, and the boiler uses low-pressure steam to heat ...

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PUM

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Abstract

The invention discloses an oven-drying working process for a coke dry quenching system. The process comprises the following steps: step 1, drying a dry quenching oven with warm wind; step 2, drying the dry quenching oven with coal gas after the step 1 is finished; and step 3, after the step 2 is finished, putting red-hot coke in the dry quenching oven so that a refractory material is heated to 950-1050 DEG C at the speed of less than or equal to 30 DEG C/h, thereby completing the oven-drying operation. According to the oven-drying working process for the coke dry quenching system, in the warmwind drying process, the temperature of a boiler collecting box is in conformity with the temperature of a steam pocket, thus the gap generated due to the tremble of the boiler when an airlift pump works is avoided so that boiler steam can not be intermixed with dry air, thereby correctly and timely judging the drying condition of the dry quenching oven; and in the coal gas drying stage, the refractory material is heated according to a heating crystal form conversion curve through reasonably controlling the coal gas-air proportion and heating speed, thereby avoiding the conditions that mixed coal gas extinguishes, the refractory material is broken or damaged, and the like. Thus, by the process disclosed by the invention, the service life of the dry quenching oven refractory material can be prolonged, the safe work of a boiler system can be ensured and the service life of the boiler system is prolonged, and oven-drying working time can be shortened at the same time.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to an oven process of a CDQ system. Background technique [0002] Before the CDQ oven is put into production, it is necessary to dry the furnace body to separate out the moisture of the refractory material in the furnace, and to raise the temperature of the furnace body, so as to connect with the furnace temperature when red coke is loaded into normal production, so as to prevent the refractory masonry from cracking or damage. [0003] In the prior art, the CDQ system oven start-up process is divided into three stages. The first stage is the warm air drying stage, the main purpose of which is to separate out the moisture of the refractory material in the CDQ furnace; the second stage is the gas drying stage. In the furnace stage, it is necessary to prevent the cracking or damage of the refractory masonry; the third stage is the red coke casting stage. This stage is mainly to continu...

Claims

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Application Information

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IPC IPC(8): C10B39/02
Inventor 刘杰
Owner CHONGQING IRON & STEEL CO LTD
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