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Combined emission-reducing device for multiple pollutants in flue gas caused by iron-ore sintering and use method thereof

A technology for sintering flue gas and combined emission reduction, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of reducing nitrogen oxide emissions and reducing the types of pollutants, and achieve the effect of promoting effective reduction

Inactive Publication Date: 2019-01-18
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of fewer types of pollutants in the sintering process in the prior art, and to provide a joint emission reduction device for various pollutants in iron ore sintering flue gas and its use method; Dry-mix fuel particles with a small diameter and a small amount of quicklime particles to prepare a modified fuel. Mixing the modified fuel into the sinter mixture can effectively reduce the emission of nitrogen oxides; Effective emission reduction; and a desulfurization tower is installed to realize the joint emission reduction of various pollutants in the sintering process

Method used

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  • Combined emission-reducing device for multiple pollutants in flue gas caused by iron-ore sintering and use method thereof
  • Combined emission-reducing device for multiple pollutants in flue gas caused by iron-ore sintering and use method thereof
  • Combined emission-reducing device for multiple pollutants in flue gas caused by iron-ore sintering and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as Figure 1~2 As shown, a combined emission reduction device for multiple pollutants in iron ore sintering flue gas according to the present invention includes a fuel modification unit, a sintering trolley 700 and a flue gas treatment unit. The fuel modification unit includes a hopper, a crusher 920, a dry mixer 930 and a mixer 940; the hopper includes a quicklime hopper 911, and a high-temperature dryer is arranged on the hopper to generate high temperature to dry the quicklime in the hopper, and the quicklime hopper 911 and The discharge port of the fuel hopper 912 is set above the crusher 920; the discharge end of the crusher 920 is connected to the feed end of the dry mixer 930; a vibrating screen is arranged below the crusher 920, and a diameter The sieve hole is 0.3mm-5mm; the discharge end of the dry mixer 930 is set correspondingly to the feed end of the mixer 940, and a dryer is installed in the dry mixer 930 to dry the inner wall of the dry mixer. The d...

Embodiment 2

[0058] The basic content of this embodiment is the same as that of Example 1, except that the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in step (1) is: 1 to 1.86, the particle size of the fuel in this embodiment The composition is shown in Table 2, wherein the mass ratio of the fuel with particle size less than 1.0 mm to the fuel with particle size greater than 1.0 mm in this embodiment is 1.

[0059] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 5.

[0060] The particle size composition of the fuel of table 2 embodiment 2

[0061]

Embodiment 3

[0063] The basic content of this embodiment is the same as that of Example 1, except that the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in step (1) is: 1 to 1.86, the particle size of the fuel in this embodiment The composition is shown in Table 3, wherein the mass ratio of the fuel with a particle size of less than 1.0 mm to the fuel with a particle size greater than 1.0 mm in this embodiment is 1.5.

[0064] Put the mixed material on the trolley, ignite the mixed material, ventilate and sinter, and detect the NO in the sintering flue gas in the main sintering flue gas pipeline X content, and recorded as shown in Table 5.

[0065] The particle size composition of the fuel of table 3 embodiment 3

[0066]

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Abstract

The invention discloses a combined emission-reducing device for multiple pollutants in flue gas caused by iron-ore sintering and a use method thereof and relates to the technical field of emission reduction of pollutants from sintering. The combined emission-reducing device comprises a fuel modifying unit, a sintering bogie and a flue-gas treating unit, wherein the fuel modifying unit comprises ahopper, a crusher, a dry mixing machine and a mixer; the hopper is arranged above the crusher, and the dry mixing machine and the mixer are arranged behind the crusher; an electrostatic dust remover and a desulfurizing tower are arranged in a main flue of the sintering bogie. The combined emission-reducing device disclosed by the invention has the beneficial effects that quick lime is adopted formodifying the fuel by the fuel modifying unit to obtain modified fuel, and after the modified fuel is added into mixture, effective emissin reduction of NOx from sintering can be realized; in addition, by arrangement of the electrostatic dust remover and the desulfurizing tower in the main flue, effective emission reduction of fine particles and SO2 of the flue gas caused by sintering can be realized and further combined emission reduction of multiple pollutants in the sintering process can be realized.

Description

technical field [0001] The invention relates to the technical field of emission reduction of sintering pollutants, and more specifically relates to a combined emission reduction device for various pollutants in iron ore sintering flue gas and a method for using the same. Background technique [0002] The iron ore sintering process is a very important process in the current iron and steel production process. It bears the heavy responsibility of blast furnace ironmaking raw material processing. However, the sintering process is also a major pollutant emitter in the iron and steel industry, and its harm to the environment cannot be ignored. For example, NOx, SO emitted from the sintering process 2 and air pollutants such as fine particles. [0003] At present, the situation of NOx emission in the sintering process is particularly severe. A large amount of NOx emission is an important reason for the formation of photochemical smog and acid rain, causing serious harm to the ecol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10B01D53/50B01D53/86B01D53/56B01D51/02B03C3/00B03C3/017F27D17/00
CPCB01D51/02B01D53/50B01D53/8628B01D2258/0283B03C3/00B03C3/017C10L9/10C10L2290/141C10L2290/24C10L2290/28F27D17/008
Inventor 春铁军龙红明李家新穆固天朱梦飞余正伟王平孟庆民狄瞻霞魏汝飞代梦博秦立浩
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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