Flue gas comprehensive cyclic treatment method and treatment device for two series of sintering systems

A flue gas recycling and cyclic processing technology, applied in gas processing, separation methods, chemical instruments and methods, etc., can solve the problems of increased investment, high environmental protection costs, and increased energy consumption.

Active Publication Date: 2019-04-05
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the current dual-series sintering system, due to the large output, the amount of flue gas produced is also large, and the corresponding amount of harmful substances in the flue gas will increase. In this way, the cost of environmental protection will become higher and higher, and the investment will also increase. also increased

Method used

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  • Flue gas comprehensive cyclic treatment method and treatment device for two series of sintering systems
  • Flue gas comprehensive cyclic treatment method and treatment device for two series of sintering systems
  • Flue gas comprehensive cyclic treatment method and treatment device for two series of sintering systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] A dual-series sintering system flue gas comprehensive circulation treatment method, the sintering system includes A sintering system 1 and B sintering system 2, the method includes the following steps:

[0120] 1) Sintering process: The sintering material is loaded into the sintering machine in A sintering system 1 and B sintering system 2 respectively, and then the sintering material on the sintering machine is ignited and burned through the ignition furnace installed at the front of the sintering machine, and then introduced from the ring cooling The hot air of the machine is used for combustion-supporting sintering; the air above the sintering machine is drawn into the sintering material on the sintering machine independently by the main exhaust fan A103 of A sintering system 1 and the main exhaust fan B203 of B sintering system 2; The flue gas generated by the sintering machine enters the large flue A10102 in the A sintering system 1, and the flue gas generated by th...

Embodiment 2

[0128] Repeat Example 1, except that 60 (vol)% of the flue gas in the large flue A10102 is sent to the activated carbon desulfurization and denitrification system 104 . 20 (vol)% of the flue gas in the large flue A10102 is delivered to the flue gas circulation hood of the sintering machine A in the A sintering system 1 . 20 (vol)% of the flue gas in the large flue A10102 is delivered to the flue gas circulation hood of the sintering machine B in the B sintering system 2 .

Embodiment 3

[0130] Repeat Example 2, except that 70 (vol)% of the flue gas in the large flue A10102 is sent to the activated carbon desulfurization and denitrification system 104 . 15 (vol)% of the flue gas in the large flue A10102 is delivered to the flue gas circulation hood of the sintering machine A in the A sintering system 1 . 15 (vol)% of the flue gas in the large flue A10102 is delivered to the flue gas circulation hood of the sintering machine B in the B sintering system 2 .

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Abstract

A flue gas comprehensive cyclic treatment method for two series of sintering systems includes steps: 1) sintering, to be more specific, sintering raw materials in sintering machineS to generate sintering gas; 2) cooling, namely cooling the sintered raw materials in circular cooling machineS; 3) flue gas treatment, to be more specific, after the sintering gas passes through dedusting deviceS, entering a desulfurization and denitrification system to realize treatment, wherein a sintering system A is an activated carbon desulfurization and denitrification system, a system B is a wet desulfurization and denitrification system, and sintering flue gas of the sintering system A is fed into the sintering machine of the sintering system A and the sintering machine of the sintering system B throughtwo cyclic gas branch pipes respectively. In the dry desulfurization and denitrification system, the sulfide concentration is increased while the nitride concentration is reduced, and dry desulfurization and denitrification can be benefited; in the wet desulfurization and denitrification system, the sulfide concentration and the nitride concentration are reduced, and wet desulfurization and denitrification can be benefited. Therefore, energy consumption in industrial production is reduced, and production cost is saved.

Description

technical field [0001] The invention relates to a flue gas circulation method of a sintering system, in particular to a comprehensive flue gas circulation method of a double-series sintering system, which belongs to the technical field of sintering flue gas treatment. Background technique [0002] As the iron and steel sintering plant mainly produces sinter, the sinter is used for blast furnace ironmaking. In the iron and steel sintering plant, the main process is to batch iron concentrate, flux, fuel and other raw materials, then mix and granulate, and then enter the sintering machine for sintering. After sintering, it is crushed and screened to obtain sintered ore. During sintering, air is sucked from the upper part of the sintering machine into the material of the sintering machine by the fan and ignited with the fuel in the material for sintering. The dust collector goes to the desulfurization and denitrification system, and the flue gas is discharged after desulfurizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02B01D53/78B01D53/86B01D49/00B01D53/70F23J15/06F23J15/00F23J15/02
CPCB01D49/00B01D53/02B01D53/70B01D53/78B01D53/8628B01D53/8631B01D2251/2062B01D2253/102B01D2257/206B01D2257/302B01D2257/40F23J15/003F23J15/02F23J15/022F23J15/06
Inventor 周志安李康周晓青代友训
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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