Heat storage and heat exchange method for coal pyrolysis furnace combustion heater

Abstract

The invention discloses a heat storage and heat exchange method for a coal pyrolysis furnace combustion heater. The method comprises the following steps that: firstly, after hot waste gas in a first combustion chamber enters a second combustion chamber, the hot waste gas is discharged out from a second burnt waste gas exhaust branch pipe through the heat absorbing and temperature decreasing of a second heat accumulator in a second heat accumulation cavity; secondly, when the coal gas in the second combustion chamber is burnt, air enters the second combustion chamber through the second heat accumulation cavity and is heated by the second heat accumulator to become hot air for the combustion supporting of the coal gas in the second combustion chamber; and simultaneously, the hot waste gas after combustion in the second combustion chamber enters the first combustion chamber and is discharged out from a first burnt waste gas exhaust branch pipe through the heat absorbing and temperature decreasing of a first heat accumulator in a first heat accumulation cavity; and thirdly, the first step and the second step are carried out alternately and circularly. The method can heat air entering a gas chamber and also can carry out heat storage by using the hot waste gas after the combustion of the coal gas so that the coking cost is saved without extra heat source.

Description

technical field [0001] The invention relates to an air heating method for a gas heating device, in particular to a heat storage and heat exchange method for a gas heater that utilizes raw coal gas generated during coal pyrolysis to recycle and purify clean gas for combustion. Background technique [0002] At present, most coal pyrolysis furnaces (coke ovens) on the market adopt batch-type coking, and the process steps such as the proportion of coal into the furnace, dehydration, coal feeding, preheating, carbonization, coke reforming, and CDQ are relatively independent and cannot be carried out. Continuous production, low production efficiency; In addition, the raw coal gas produced in the coal pyrolysis process contains many useful components, such as H 2 S, HCH and other acid gases, NH 3 Alkaline gas, tar, benzene, naphthalene, washing oil and other organic substances do not have a complete process for exporting, recovering and purifying raw gas. [0003] This impels the...

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Problems solved by technology

[0002] Most coal pyrolysis furnaces (coke ovens) currently on the market adopt batch-type coking. Coke upgrading, dry quenching and other process steps are relatively independent, continuous production cannot be carried out, and production efficiency is low; in addition, the raw coal gas generated during coal pyrolysis contains many useful components, such as H2S , HCH and other acid gases, NH3 basic gas, tar, benzene, naphthalene, washing oil and other organic substances, there is no complete process for exporting, recycling and purifying raw gas

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