A non-gas dry quenching method

Abstract

The invention provides a non-gas coke dry quenching method. Red coke which comes out of a coke oven and is at the temperature of 950-1050 DEG C is rolled and conveyed in a closed red coke cooling quasi boiler system after entering the closed red coke cooling quasi boiler system. Heat transfer of red coke and the red coke cooling quasi boiler system is directly achieved by transferring heat carried by red coke to the red coke cooling quasi boiler system in a radiative transfer mode. Red coke is cooled in the rolling and conveying process, and cooled low-temperature coke is output. Coke quenching is conducted through the closed red coke cooling quasi boiler system, draft is very low, only a trace of air enters the closed red coke cooling quasi boiler system when coke is conveyed without introducing N2 for cooling, power consumption generated when N2 system circulation is run by a conventional coke dry quenching system is eliminated, and dust removal and other processing do not need to be conducted on gas subjected to heat exchange.

Description

technical field [0001] The invention relates to a non-gas dry coke quenching method, which is suitable for the utilization of waste heat of red coke after coke is discharged from a coke plant, and belongs to the technical field of emerging strategic industries for energy saving and emission reduction. Background technique [0002] At present, there are two technologies for coke quenching: one is N 2 CDQ technology, the so-called dry coke quenching (Coke Dry Quenching, abbreviated as CDQ), is to use cold nitrogen, an inert gas, to exchange heat with hot coke in the coke oven, and the inert circulating gas in the CDQ After cooling the red coke, the high-temperature circulating gas that has absorbed the heat of the red coke passes through the primary dust collector to remove coarse coke powder and then enters the boiler. The boiler absorbs heat to generate steam, and the cooled inert circulating gas passes through the secondary dust collector to remove fine coke powder , and t...

AI Technical Summary

Problems solved by technology

If the fixed ammonium salt is not released well, it will increase the ash content of the coke, mainly because the malodorous gas cannot be controlled, which will cause great harm to people and the environment, and the coke line equipment will be severely corroded.

[0003] In short, CDQ adopts N 2 It is heat transfer and exchange of red coke heat through forced convection heat transfer, the efficiency is low, and a small amount of air will leak into the negative pressure section of the gas circulation system, O 2 Passing through the red coke layer will react with coke to generate CO 2 , CO 2 In the high-temperature zone of the coke layer, it will be reduced to CO again. With the increase of the number of cycles, the concentration of CO in the circulating gas is getting higher and higher, and the H produced by coke pyrolysis 2 , CO, CH 4 etc. are also flammable and explosive components. Therefore, during CDQ operation, the concentration of flammable components in the circulating gas should be controlled below the explosion limit. Generally, it is necessary to continuously fill the gas circulation system with N 2 , to dilute the combustible gas to produce N 2 The cost of energy consumption is high, and the complexity of system equipment such as system dust removal reduces the reliability of the system, and the release of a corresponding amount of circulating gas will also cause environmental pollution and potential safety hazards of combustible gases; wet coke quenching obviously still turns the heat of red coke into volatilization The water vapor is scattered into the atmosphere, wasting water resources, and the quality of coke is also reduced.

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