Dry quenching exhaust gas generation and combustion heating method

Abstract

The invention discloses a dry quenching exhaust gas generation and combustion heating method. The method comprises the following steps: (1), clean gas is combusted to generate exhaust gas, and the exhaust gas is cooled through heat absorption to become low-temperature exhaust gas; (2), coke is subjected to dry-quenching cooling through the low-temperature exhaust gas; (3), high-temperature combustible exhaust gas is generated in the dry quenching process; (4), the high-temperature combustible exhaust gas is introduced to a main inner flame path and a lower section auxiliary inner flame path; (5), air is replenished to the main inner flame path and the lower section auxiliary inner flame path to enable the high-temperature combustible exhaust gas to combust; (6), the high-temperature combustible exhaust gas in the lower section auxiliary inner flame path flows to the main inner flame path through bypassing after being subjected to primary air-replenishing combustion, so as to be mixed with the high-temperature combustible gas and burnt exhaust gas in the main inner flame path; (7), air is replenished again to the middle upper part of the main inner flame path, and the mixture gas is combusted again; (8), exhaust gases after secondary air-replenishing combustion are mixed among the main inner flame paths and upper section auxiliary inner flame paths; and (9), the exhaust gas is finally discharged. According to the invention, the high-temperature combustible exhaust gas generated by dry quenching is combusted, and an extra heating device is not needed.

Description

technical field [0001] The invention relates to a method for generating combustible high-temperature waste gas and burning and heating, in particular to a method for generating and burning dry-quenching waste gas. 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 inventors to explore and innovate a complete set of continuous...

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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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