Method and device for supplying heat carrier gas to preset combustion chamber of oxygen-enriched combustion internal heating type coal low-temperature dry distillation furnace

Abstract

The invention discloses a heat carrier gas supplying method and device for a preset combustion chamber of an oxygen-enriched combustion internal heating type coal low-temperature dry distillation furnace, and belongs to the field of low-temperature dry distillation in the coal chemical industry. A furnace body is additionally arranged outside the dry distillation furnace to serve as a preset combustion chamber, oxygen-enriched air and low-temperature dry distillation gas are combusted in the combustion chamber, a certain amount of adjusting gas is added to enter the combustion chamber to be mixed with combustion products, the temperature of the combustion products is adjusted to a target value needed by dry distillation, and hot carrier gas is formed to enter the dry distillation furnace to provide heat for the low-temperature dry distillation process of coal. Wherein the form of the furnace body can be a distributed preset combustion chamber or a centralized preset combustion chamber. According to the invention, stable large-equivalence-ratio combustion of low-temperature dry distillation gas and oxygen-enriched air can be realized on the basis of an original dry distillation furnace, hot carrier gas with uniform temperature and components is provided for the dry distillation furnace, and the technical problems of non-uniform temperature at each fire hole, over-temperature and slag bonding at the fire hole are solved.

Description

technical field [0001] The invention belongs to the field of low-temperature dry distillation of coal chemical industry, and in particular relates to a method and device for supplying heat carrier gas to a combustion chamber of a preset combustion chamber of an oxygen-enriched combustion internal heat type coal low-temperature dry distillation furnace. Background technique [0002] Low-temperature dry distillation is an effective method to achieve graded and quality-separated utilization of low-metamorphic coal. The existing coal low-temperature carbonization process mainly adopts an internal heating type vertical furnace, which uses coal gas and air to enter from the lower part of the furnace body, and burns in the fire channel to generate high-temperature gas, which is discharged from the fire hole and enters the carbonization section to provide heat for the coal low-temperature carbonization process. During this process, the raw coal is fed from the upper part of the furn...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a method and device for supplying heat carrier gas to the preset combustion chamber of an oxygen-enriched combustion internal heat coal low-temperature carbonization furnace, which can solve the problem of directly implementing oxygen-enriched combustion in the carbonization furnace. The local temperature of the fire channel is too high, the fire hole is slagged, the air flow and temperature distribution in the furnace are uneven, the furnace condition fluctuates, it is difficult to go straight, and the quality of the retort product is unstable.

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