Dry quenching primary dust removal coke powder waste heat recovery method and device

Abstract

The invention discloses a dry quenching primary dust removal coke powder waste heat recovery method and device and relates to the field of coke stoves. According to the method, coke dry quenching primary dust removal coke powder sinks in an ash bucket, and the flow of the coke dry quenching primary dust removal coke powder is controlled through an outlet; an ash bucket coke powder level is established, and and a waste heat recovery heat exchange process in triangular distribution is buried under the coke powder at the level; and with the slow discharge of the coke powder, hot coke powder slowly descends, the coke powder descends and flows to be in contact with a heat exchange tube, and the high-temperature coke powder transfers continuous heat to a working medium in the heat exchange tube.The invention further provides a dry quenching primary dust removal coke powder waste heat recovery device. The device comprises a primary dust removal ash bucket barrel 1, a sieve plate 2, a baffle3, a heat exchange pipe 4, a control valve 5, a material level control system 6, a large coke block collecting pipe 7 and two balance valves 8. With the method and device of the invention adopted, intermittent operation of primary dust removal along with glowing coke discharge and alternating temperature load of intermittent operation of glowing coke waste heat recovery are eliminated, so that a waste heat recovery system can continuously and stably operate.

Description

technical field [0001] The invention relates to the field of coke dry quenching of coal coke ovens, in particular to a method and device for recovering waste heat of coke powder with primary dedusting of CDQ, and is especially suitable for a method and device for recovering high-quality waste heat of coke powder with primary dedusting of coke oven CDQ. Background technique [0002] The first dedusting of CDQ in coke oven is to cool the red coke at 900-960℃ with the help of inert circulating gas. fight. At present, the coke powder ash hopper adopts a jacket structure, and a large amount of circulating water is passed into the jacket to cool the red coke coke powder at 900-960°C. Utility Model Patent (Patent No.: 201820161448.5) "A Heat Recovery Device for CDQ Coke Powder" adds a desalinated water system to the circulating water used in the original water-cooled casing structure to recover 900-960 °C red The residual heat of coke powder. Invention patent (patent number: 201...

AI Technical Summary

Problems solved by technology

[0006] The waste heat of red coke coke powder at 900~960℃ is high-quality heat energy. The jacket is a water-cooled inner cylinder to withstand external pressure. The stability of the inner cylinder structure is far lower than the fracture strength of the material, so this part of the coke cannot be recovered with high quality. High-quality thermal energy of the powder

[0007] The intermittent red coke flow brings the stress fatigue problem of alternating temperature to the jacketed water-cooled structure. The damage of fatigue damage is far greater than the damage of tensile strength. Therefore, the safety hazard of the system is very high.

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