Heat recovery coke oven fixed cover type machine side dust-removing technique

Abstract

The invention relates to a heat recycling coke oven fixed cover side dust removing technics. The fixed dust-collector hood is equipped in upper part of the oven gate of each hole. The fixed dust-collector hood, the guiding pipe, the constant close guiding pipe, the dust-collecting dried pipe at top, the oven group switching valve, the connecting pipe form passage of the soot. Under effect of timing dust-removing ventilator group, the soot collected by the fixed dust-collector hood is purified by bag dust-catcher through entering said passage. The gas purified is discharged to air via chimney.The technics can effectively collect and purifie soot at heat recycling coke oven side, improve work condition and prevents it from environment pollution.

Description

technical field [0001] The invention relates to a machine-side dedusting process for heat recovery coke ovens (also called non-recovery coke ovens when coke oven flue gas waste heat is not recycled), which is mainly used in machine-side dedusting of various heat recovery coke ovens newly built, rebuilt and expanded. Side dusting. Background technique [0002] On the machine side of the heat recovery coke oven, from the opening of the furnace door, during the whole process of coke pushing and coal charging to the closing of the furnace door, a large amount of smoke and dust will overflow from the coke oven hearth, especially during the coal charging process. The amount of smoke and dust is the largest. Heat recovery The smoke and dust overflowing from the furnace side of the coke oven machine has the following characteristics: 1. The smoke and dust overflowing from the furnace is periodic. The heat recovery coke oven is operated under negative pressure. There is no smoke an...

AI Technical Summary

Problems solved by technology

The heat recovery coke oven is operated under negative pressure. There is no smoke and dust overflow from the furnace door under normal coking operation. It is carried out according to a certain cycle, and there is a certain time interval between two adjacent coke pushing and coal charging; 2. The duration of smoke and dust overflowing in the furnace is relatively long. It usually takes 6 to 10 minutes for the whole process of coal to close the furnace door; 3. The temperature of the smoke and dust is relatively high, and the maximum temperature of the smoke and dust produced by the direct combustion of gas (and a small amount of coal) and air in the furnace can reach above 800 °C; 4. The composition of the flue gas is relatively complex, and the flue gas contains NO x , SO x , tar, BSO, BaP, coal dust, coke dust, CO 2 , coal ash and water vapor and other harmful substances and impurities; 5. The smoke and dust overflowing from the furnace has a large diffusion surface and is difficult to capture

[0003] In view of the above-mentioned characteristics of heat recovery coke oven dust, there are no effective treatment measures at present, which has become a bottleneck problem restricting the promotion and use of heat recovery coke oven technology. Therefore, the dust removal problem of heat recovery coke oven needs to be solved urgently

Images