Method for preheating coal as fired by hot exhaust gas and regenerating active coke by hot exhaust gas

Abstract

The invention discloses a method for preheating coal as fired by hot exhaust gas and regenerating active coke by hot exhaust gas. The method comprises the following steps that 1, hot exhaust gas obtained by combustion enters into an exhaust gas chamber from a hot exhaust gas feeding passage of a preheating device, then enters into an exhaust gas gathering annular passage by an exhaust gas preheating passage, and then is discharged from a main exhaust gas outlet of the exhaust gas gathering annular passage, wherein the hot exhaust gas obtained by combustion can transmit heat to the exhaust gas preheating passage and an inner wall in discharging, can heat air in a preheating chamber so that coal as fired falling into the preheating device is preheated, and simultaneously can be cooled after being discharged from the exhaust gas chamber; and 2, the cooled hot exhaust gas enters into an exhaust gas evaporation pipe net by a hot exhaust gas inlet pipe of an active coke regenerator; saturated active coke in a regenerator shell is heated and evaporated into unsaturated active coke by the exhaust gas evaporation pipe net; and then the cooled hot exhaust gas is discharged by a hot exhaust gas discharge pipe. The method provided by the invention realizes preheating of coal as fired and evaporation heating of active coke by hot exhaust gas obtained by combustion.

Description

technical field [0001] The invention relates to a method for preheating coal into a furnace and regenerating active coke, in particular to a method for preheating coal with hot waste gas and regenerating active coke. 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 continu...

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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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