Sintering flue gas purification system and method achieving energy conservation and emission reduction

A technology for sintering flue gas, energy saving and emission reduction, applied in chemical instruments and methods, separation methods, nitrous oxide capture, etc., can solve the problems of activated coke damage, energy waste, and large investment in activated coke flue gas purification process, etc. Achieve the effect of reducing consumption, reducing investment and operating costs, and realizing energy recycling

Active Publication Date: 2016-06-22
中冶北方(大连)工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process method still has the phenomenon of exhaust gas containing heat, and the energy cannot be fully recovered.
[0007] (3) Large investment in activated coke flue gas purification process
[0009] (4) Secondary pollution in activated coke flue gas purification process
[0010] There are secondary pollution problems in the activated coke flue gas purification process: such as high SO produced during the regeneration of activated coke 2 When the concentration gas is used to produce concentrated sulfuric acid, there will be waste gas, which contains SOx, sulfuric acid mist, etc.; the activated coke will be damaged during the cycle, and the damaged activated coke will

Method used

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  • Sintering flue gas purification system and method achieving energy conservation and emission reduction
  • Sintering flue gas purification system and method achieving energy conservation and emission reduction
  • Sintering flue gas purification system and method achieving energy conservation and emission reduction

Examples

Experimental program
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Example Embodiment

[0058] Example 1

[0059] An energy-saving emission reduction sintering flue gas purification system, such as figure 2 Shown, including sintering machine 1, sintering machine bottom wind box 2, sintering machine large flue 3, heat exchanger 4, electric precipitator 5, sintering main exhaust fan 6, 1# fan 7, adsorption tower 8, chimney 9, 1 #Belt conveyor 10, 1# bucket elevator 11, 2# bucket elevator 12, regeneration tower 13, vibrating screen 14, sintering machine batching system 15, 2# belt conveyor 16, 3# fan 17, gas combustion Device 18, contact method acid system 19, 4# fan 20, 2# fan 21, flue gas distributor 22;

[0060] Among them, the sintering machine 1 is connected to the bottom wind box 2 of the sintering machine, the bottom wind box 2 of the sintering machine is connected to the large flue 3 of the sintering machine, the large flue 3 of the sintering machine is connected to the sintering main exhaust fan 6, and the sintering main exhaust fan 6 and 1# fan 7 connection, ...

Example Embodiment

[0073] Example 2

[0074] An energy-saving emission reduction sintering flue gas purification system, such as image 3 Shown, including sintering machine 1, sintering machine bottom wind box 2, sintering machine large flue 3, electrostatic precipitator 5, sintering main exhaust fan 6, 1# fan 7, adsorption tower 8, chimney 9, 1# belt conveyor 10. 1# bucket elevator 11, 2# bucket elevator 12, regeneration tower 13, vibrating screen 14, sintering machine batching system 15, 2# belt conveyor 16, 3# fan 17, gas burner 18, contact method Acid system 19, 4# fan 20, 2# fan 21, flue gas distributor 22, dust collector 23;

[0075] Among them, the sintering machine 1 is connected to the bottom wind box 2 of the sintering machine, and the wind boxes at the head and the tail of the bottom wind box 2 of the sintering machine are connected with the dust collector 23, and the remaining wind boxes are connected with the large flue 3 of the sintering machine. The flue 3 is connected to the electro...

Example Embodiment

[0086] Example 3

[0087] The method for purifying sintering flue gas by using the energy-saving and emission-reducing sintering flue gas purification system of Example 1 includes the following steps:

[0088] 1) Heat utilization of flue gas from sintering machine

[0089] The high-temperature flue gas generated by the sintering machine enters the sintering flue through the air box at the bottom of the sintering machine. The flue gas exchanges heat through the heat exchanger, passes through the electric precipitator and the sintering main exhaust fan, and a part of the flue gas is pressurized by the 1# fan to enter the adsorption In the tower, another part of the flue gas is used as the circulating flue gas to enter the pipe at the front end of the 2# fan through the circulating flue gas pipe; adjust the heat exchange by adjusting the water flow in the heat exchanger to ensure that the temperature of the flue gas entering the tower is controlled at 120~ 140℃; after heat exchange, th...

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Abstract

The invention belongs to the technical field of sintering flue gas purification technologies, and provides a sintering flue gas purification system and method achieving energy conservation and emission reduction in order to solve the problems existing in the prior sintering flue gas purification technology. The system comprises a sintering machine, a flue gas distributor, a sintering machine bottom bellows, a sintering machine large gas duct, an electric dust remover, a sintering main exhaust fan, a first fan, a second fan, an adsorption tower, a chimney, a material conveyor and a regeneration tower. Besides, a heat exchanger is arranged in the sintering machine large gas duct of the system, or the system is further provided with a dust remover, and all the devices are connected sequentially through pipelines. The method includes the steps of utilization of flue gas heat of the sintering machine, adsorption of the adsorption tower and regeneration of active coke. According to the system and method, on the basis of effectively controlling the temperature of flue gas, fully utilizing heat-contained exhaust gas, reducing the scale of an active coke flue gas purification device, avoiding secondary pollution and realizing recycling of resources, the investment and operation expenses are lowered.

Description

technical field [0001] The invention belongs to the technical field of sintering flue gas purification, and in particular relates to an energy-saving and emission-reducing sintering flue gas purification system and method. Background technique [0002] A large amount of flue gas is produced during the sintering production process, and substances such as SOx, NOx, particulate matter, heavy metals and dioxins contained in the flue gas pollute the environment. With the increasingly stringent national environmental protection requirements, the technology of comprehensive treatment of multiple pollutants is an inevitable trend in the development of flue gas treatment. The activated coke flue gas purification process can realize low-temperature denitrification on the basis of desulfurization, and has a certain removal effect on dust, heavy metals, dioxins and other pollutants. In addition, the by-product of desulfurization is high-quality sulfuric acid, which can recover sulfur r...

Claims

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Application Information

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IPC IPC(8): F27D17/00B01D53/04
CPCB01D53/04B01D2253/102B01D2257/302B01D2257/40B01D2257/402B01D2257/404B01D2257/70B01D2258/0283B01D2259/4009F27D17/004F27D17/008Y02C20/10
Inventor 万利远郑绥旭丁志伟张奇
Owner 中冶北方(大连)工程技术有限公司
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