Preheating device of coal as fired in coal pyrolysis furnace
A preheating device and coal pyrolysis technology, which is applied in the heating of coke ovens, coke ovens, coke oven parts, etc., can solve the problems of temperature reduction and no utilization of hot waste gas.
Inactive Publication Date: 2014-01-29
SHANXI XINLI ENERGY TECH
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Problems solved by technology
[0003] However, most coal pyrolysis furnaces (coke ovens) currently on the market use intermittent coking. Coal pyrolysis furnaces will generate a large amount of hot waste gas, which is often discharged directly to the atmosphere, and the hot waste gas is not fully utilized. The temperature of the furnace coal will drop during the transportation process
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[0028] The specific embodiment of the coal preheating device of the coal pyrolysis furnace of the present invention is mainly introduced in detail in the second section of the third part below.
[0029] Part 1 Furnace Coal Proportion and Preparation
[0030] The coal pyrolysis furnace involved in the present invention can obtain cokes of different grades according to different proportions of coals fed into the furnace.
[0031] The steps are as follows: 1) 5 kinds of different coals are selected, which are respectively gas coal, fat coal, coking coal, one-third coking coal and lean coal. 2) Gas coal 20%~40%; fat coal 10%~20%; coking coal 10%~20%; one-third coking coal 15%~30%; lean coal 10%~15%, first mix and then sieve Broken until the broken particles reach below 5mm to form coal into the furnace. Of course, the coal pyrolysis furnace of the present invention is equally applicable to coal into the furnace with other proportions and particle sizes, and does not constitute a ...
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The invention discloses a preheating device of coal as fired in a coal pyrolysis furnace. The preheating device comprises a furnace body, a waste gas chamber, more than one waste gas preheating channel and preheaters; the furnace body is divided into an inner, middle and outer wall bodies, the waste gas chamber is formed at the inner wall body, a waste gas gathering loop is formed between the middle wall body and the outer wall body, a main waste gas outlet is arranged in the waste gas gathering loop, the waste gas preheating channel passes through the inner and middle wall bodies to communicate the waste air chamber with the waste gas gathering loop, a plurality of preheating chambers are partitioned between the inner wall body and the middle wall body, and the preheaters are respectively arranged in each preheating chamber; and the bottom of the waste gas chamber is provided with a hot waste gas inlet channel, hot waste gas after combustion enters from the hot waste gas inlet channel, enters the waste gas gathering loop through the waste gas preheating channel and is finally discharged out from the main waste gas outlet of the waste gas gathering loop. In the preheating device, the coal as fired falling into the preheater is preheated by using the hot waste gas, and simultaneously the temperature of the hot waste gas also can be reduced so as to achieve the purpose of utilizing own exhaust heat of the hot waste gas.
Description
technical field [0001] The invention relates to a preheating device, in particular to a device for preheating coal fed into the furnace by utilizing hot waste gas after combustion in a coal pyrolysis furnace. Background technique [0002] In the coal pyrolysis technology, it is hoped that the coal entering the furnace will maintain a certain temperature before entering the carbonization chamber of the coal pyrolysis furnace, so that better grade coke can be smelted. [0003] However, most coal pyrolysis furnaces (coke ovens) currently on the market adopt batch-type coking, and coal pyrolysis furnaces will generate a large amount of hot waste gas, which is often discharged directly to the atmosphere without making full use of the hot waste gas. The temperature of the furnace coal will decrease again during the transportation process. [0004] This prompts the inventors to consider and develop a device that can utilize the hot waste gas after combustion in the coal pyrolysis ...
Claims
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IPC IPC(8): C10B57/08C10B29/00C10B57/00
Inventor 王新民左晓鸣
Owner SHANXI XINLI ENERGY TECH