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Sintered flue gas dry-method removal method and device

A sintering flue gas removal technology, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as difficult removal of harmful gas and inability to adapt to large-scale changes in flue gas volume.

Active Publication Date: 2008-11-19
FUJIAN LONGKING DSDN ENGINEERING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology is only suitable to meet the desulfurization requirements. Since there are many harmful gases such as heavy metals, dioxins, HCL and HF in the sintering flue gas, it is not easy to remove these harmful gases with this technology and device.
In addition, this technology cannot adapt to the requirements of working conditions with large-scale changes in flue gas volume.

Method used

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  • Sintered flue gas dry-method removal method and device
  • Sintered flue gas dry-method removal method and device

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Embodiment Construction

[0019] figure 1 The shown sintering flue gas dry removal method comprises the following steps:

[0020] 1) When the high-temperature flue gas enters the rapid mixing zone 4, the absorbent is added, and the absorbent is pre-mixed and pretreated with the flue gas in the rapid mixing zone 4 to remove part of SO 2 , SO 3 , heavy metals, dioxins, most HCL, HF gases;

[0021] 2) The flue gas coming out of the rapid mixing zone 4 enters the circulating fluidized reaction zone 7 after being accelerated by the accelerating zone 5, and sprays water at the front end of the circulating fluidized reaction zone 7 to cool down, and continues to remove the residual gas in the circulating fluidized reaction zone 7. SO 2 , SO 3 , heavy metals, dioxin components;

[0022] 3) The purified flue gas enters the gas-solid separator 9 through the outlet flue 8 of the reaction tower, the desulfurization ash is captured by the gas-solid separator 9, and enters the rapid mixing zone 4 through the ci...

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Abstract

The invention discloses a drying removal method and a device for sintering flue gas. When the high-temperature flue gas enters an inlet flue (1) of a rapid mixing zone (4), an absorbent is added for removing a part of harmful gas; the flue gas form the rapid mixing zone (4) enters a circulating fluidization reaction zone (7) after the speed increase by an accelerating zone (5), water spray is carried out at the front end of the circulating fluidization reaction zone (7) for temperature decrease, and the circulating fluidization reaction zone (7) continually removes the residual harmful gas; the purified flue gas enters a gas-solid separator (9) through an outlet flue (8) of a reaction tower and then enters the rapid mixing zone (4) through a circulating fluidization clino slot (12), and the flue gas after the purification is emitted to a chimney (11) through an induced draft fan (10); a clean flue gas re-circulating flue (14) is arranged on an exhaust flue of the induced draft fan (10), and the other end of the clean flue gas re-circulating flue (14) is connected with the inlet flue (1) of the reaction tower.

Description

Technical field [0001] The invention relates to a method for dry removal of sintering flue gas, and also relates to a device used in the method. Background technique [0002] Chinese patent (notification number CN2813075y) discloses such a sintering machine head flue gas desulfurization device, its structural features: the flue, connected to the outlet of the sintering induced draft fan, is used to introduce the desulfurized flue gas; the desulfurization agent feeding device, Set on the flue; a circulating fluidized bed reactor, which includes a bottom flue gas inlet section connected to the flue, an upper straight pipe section, and a Venturi pipe section between the bottom flue gas inlet section and the upper straight pipe section; connecting the flue gas Road, whose inlet is connected to the straight pipe section of the circulating fluidized bed; mechanical separator, which is connected to the outlet of the above-mentioned connecting flue; bag filter, which is connected to...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/81
Inventor 赖毅强徐海军林春源陈燕玲王晓增
Owner FUJIAN LONGKING DSDN ENGINEERING CO LTD
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