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Coking coal cascade preheating process and equipment

A technology of coking coal and cascade, applied in the field of coking, can solve the problems of complex production operation control, difficult separation of smoke and dust, poor operation stability, etc., and achieve the effects of saving coking heat consumption, reducing diffusion resistance and improving fluidity.

Pending Publication Date: 2021-12-31
大连科力一诺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the coal preheating and coking production of the above-mentioned coking plants, problems such as high energy consumption, difficult separation of smoke and dust, large equipment and poor operation stability have been exposed in the coal fluidized preheating process technology; hot flue gas is used as the heat carrier for The oxygen content in the hot flue gas needs to be strictly controlled during coal fluidized preheating to prevent coal dust explosion in the flue gas, and there are problems of complex production operation control and poor safety
Due to the existence of the above problems, each preheated coal coking oven was forced to stop production after running for a period of time

Method used

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  • Coking coal cascade preheating process and equipment
  • Coking coal cascade preheating process and equipment
  • Coking coal cascade preheating process and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment discloses a cascade preheating process and equipment for coking coal, the structure of which is as follows Figure 1-4 As shown, it includes: coal feed tank 11, feeding screw 12, cross-domain two-phase flow humidifier, gravity moving bed dryer, coal preheating plate heat exchanger 4, first inertial dust collector 51, first humidification multiple Tube dust collector 52, first fan 53, humidity control cyclone separator 55, humidity control heater 54, second inertial dust collector 61, second humidity control multi-pipe dust collector 62, second fan 63, drying cyclone separator 64 , dry heater 65, heat conduction oil pump 71, heat conduction oil heater 72, water washing tower 8 and coal bunker 9; Described cross-domain two-phase flow humidifier comprises air flow vertical pipe 21 and spouted bed 22; Described air flow vertical pipe A spouted bed 22 is installed on the top of the 21, and the diameter ratio of the air flow vertical pipe 21 to the spouted bed...

Embodiment 2

[0053] This embodiment discloses a coking coal cascade preheating process, using the coking coal cascade preheating equipment described in Embodiment 1, including the following steps:

[0054] Step 1, the mixed and pulverized coking coal is sent to the coal feed tank 11, and the coal feed in the coal feed tank 11 is sent to the air flow vertical pipe 21 of the cross-domain two-phase flow coal humidifier through the feeding screw 12, and the superheated Steam is used as the heat carrier of the cross-domain two-phase flow coal humidifier, that is, superheated steam is passed into the bottom of the air flow vertical pipe 21, and the air flow vertical pipe 21 transports the coal material to the upper spouted bed 22, and the large particle coal material and Impurities are deposited at the bottom of the airflow vertical pipe 21, and are returned to the coal preparation system through the conveying equipment. The gas-solid material in the airflow vertical pipe 21 is in the airflow co...

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Abstract

The invention provides a coking coal cascade preheating process and equipment. The bottom of a coal trough of the coking coal cascade preheating equipment is connected with the lower part of an airflow vertical pipe through a feeding spiral, and the lower part of a spouted bed is connected with a gravity moving bed dryer; the gravity cross-flow dryer, the plate-type indirect dryer, the angular tube counter-flow dryer, the coal preheating plate-type heater and the coal bunker are sequentially arranged from top to bottom. According to the method, the coking coal preheating process is decomposed into three cascade preheating procedures of humidifying, drying and preheating according to the characteristic that the physical properties of coal materials in all stages are different in the coking coal preheating process. By adopting the coking coal cascade preheating process disclosed by the invention, the coking coal containing 10-12% of water can be humidified, dried and preheated in stages under the condition of air isolation, and finally the coking coal is preheated to 180-200 DEG C and is loaded into the preheating coal bunker; and the coal charging car charges the preheated coal in the preheated coal bunker into a coke oven carbonization chamber for coking.

Description

technical field [0001] The invention relates to coking technology, in particular to a cascaded coking coal preheating process and equipment. Background technique [0002] Coking coal preheating technology is a technology that preheats coking coal to 150-250°C before charging it into the coke oven for coking. In the 1960s, in order to reduce the amount of main coking coal in coking coal and reduce the heat consumption of coking in the coking industry of the world, the United Kingdom, Germany, the United States and other countries carried out research on coking coal preheating technology. A variety of preheated coal coking processes have been developed, mainly including Simcar method, Precarbon method, and Caoltek method. Fu, Zhang Jiadai) made a corresponding introduction to the above process. In the above-mentioned coal preheating technology, high-temperature flue gas is generally used as a heat carrier, and the coal material is dried and preheated in a fluidized rapid pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/10B01D50/00
CPCC10B57/10Y02P20/129
Inventor 戴成武于才渊毕秋实王晓光
Owner 大连科力一诺环保科技有限公司