SIMULATION STUDY ON DIFFUSION AND COLLECTION CHARACTERISTICS OF HIGH TEMPERATURE SMOKE AND DUST IN BLAST FURNACE CAST HOUSE

WANG Hui; ZHANG Pu; ZHU Fa-qiang; ZHUANG Jian-heng

doi:10.13205/j.hjgc.202011020

Volume 38 Issue 11

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(11): 123-129

WANG Hui, ZHANG Pu, ZHU Fa-qiang, ZHUANG Jian-heng. SIMULATION STUDY ON DIFFUSION AND COLLECTION CHARACTERISTICS OF HIGH TEMPERATURE SMOKE AND DUST IN BLAST FURNACE CAST HOUSE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 123-129. doi: 10.13205/j.hjgc.202011020

Citation:

WANG Hui, ZHANG Pu, ZHU Fa-qiang, ZHUANG Jian-heng. SIMULATION STUDY ON DIFFUSION AND COLLECTION CHARACTERISTICS OF HIGH TEMPERATURE SMOKE AND DUST IN BLAST FURNACE CAST HOUSE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 123-129. doi: 10.13205/j.hjgc.202011020

Citation:

WANG Hui, ZHANG Pu, ZHU Fa-qiang, ZHUANG Jian-heng. SIMULATION STUDY ON DIFFUSION AND COLLECTION CHARACTERISTICS OF HIGH TEMPERATURE SMOKE AND DUST IN BLAST FURNACE CAST HOUSE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 123-129. doi: 10.13205/j.hjgc.202011020

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SIMULATION STUDY ON DIFFUSION AND COLLECTION CHARACTERISTICS OF HIGH TEMPERATURE SMOKE AND DUST IN BLAST FURNACE CAST HOUSE

doi: 10.13205/j.hjgc.202011020

WANG Hui^{1,2
,
,},
ZHANG Pu^1,2,
ZHU Fa-qiang^1,2,
ZHUANG Jian-heng^1,3

1. Central Research Institute of Building and Construction Co., Ltd, MCC Group, Beijing 100088, China;
2. Energy-Saving and Environmental Protection Co., Ltd, MCC Group, Beijing 100088, China;
3. Zhanjiang Environmental Protection Operation Management Co., Ltd, MCC Group, Zhanjiang 524000, China

Received Date: 2019-10-31
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

The particulate matters in the unorganized emission of flue gas from the blast furnace cast house has the characteristics of scattered pollution sources, wide pollution range, long time and strong paroxysmal occurrence. Because the hot plume that the airflow above the high-temperature molten iron was greatly affected by the ventilation airflow, the existing dust cover design method couldn’t effectively solve the pollution of high temperature smoke and dust. In this study, a two-phase flow model and a numerical simulation method for the diffusion and trapping process of high temperature smoke and dust, in China’s small and medium-sized blast furnace cast house were established. The simulation results showed that the rising velocity of air flow in front of blast furnace increased first and then decreased, forming a typical confined space thermal plume. Because of the gap between the blast furnace and the dust cover of the tapping hole, the bottom airflow produced upward high-speed airflow on the blast furnace wall under the suction action, which made the dust cover had no trapping effect on the airflow between the dust collector and the blast furnace. When only the roof ventilation was used, the heat that could be carried away by ventilation was reduced, because the roof ventilation volume was two-thirds less than that of natural ventilation, which led to the overall temperature in the cast house on the high side. The temperature of the cast house decreased obviously after adding the dust cover. The overall capture rate of particulate matter by the dust cover could reach 89.66%. However, a large number of particles in front of the main ditch escaped, and the capture rate was only 47.71%. The capture rate of particulate matter released from the rear of the hot metal was 86.34%, because it was far from the dust cover. It caused a wide range of pollution, resulting in the working environment of the cast house was not up to the standard at present.
- cast house,
- high temperature smoke and dust,
- numerical simulation,
- airflow organization,
- trapping

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