Oven-drying working process for coke dry quenching system

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...

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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. Dry situation

[0006] 2. In the gas drying stage, due to the poor control of the ratio of coke oven gas and air, flameout is prone to occur during the gas drying stage, and the refractory material of the CDQ furnace cannot be heated according to the temperature-rising crystal transformation curve, which may easily cause the refractory material to break or damaged

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