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A comprehensive flue gas treatment system, method and application of a sintering plant

A comprehensive treatment and flue gas technology, applied in the field of flue gas treatment, can solve the problems of unreasonable energy utilization, neglect of interrelation and influence of sintering system, etc., and achieve the effects of low cost, heat reduction and thermal efficiency improvement.

Active Publication Date: 2017-11-07
BEIJING JINGCHENGKELIN ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the researches on sintering technology in our country only focus on one of them, ignoring the interrelationship and influence of these as sintering systems.
Considering any aspect alone will result in unreasonable energy utilization

Method used

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  • A comprehensive flue gas treatment system, method and application of a sintering plant
  • A comprehensive flue gas treatment system, method and application of a sintering plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a comprehensive flue gas treatment system in a sintering plant, the schematic diagram of which is shown in figure 1As shown, the system includes a sintering machine 1, a cooling machine 2, an SCR denitrification device 3, a desulfurization device 4, a first dust removal device 5, a second dust removal device 6, a heat exchanger 7, a first fan 8, a second fan 9, The third fan 10, the fourth fan 11, the waste heat boiler 12 and the chimney 13;

[0046] The high-sulfur high-temperature flue gas outlet of the sintering machine 1 is connected to the inlet of the heat exchanger 7 through the SCR denitrification device 3 and the first dust removal device 5 through the pipeline, and the outlet of the heat exchanger 7 is connected to the desulfurization device 4 through the pipeline. The inlet is connected, the outlet of the desulfurization device 4 is connected with the inlet of the heat exchanger 7 through the pipeline, and the outlet of the heat excha...

Embodiment 2

[0051] This embodiment provides a method for comprehensive treatment of flue gas in a sintering plant. This method is realized by using the system provided in Embodiment 1. The process flow chart is as follows figure 2 As shown, the method includes the following steps:

[0052] Sintering plant flue gas includes sintering machine flue gas and cooling machine flue gas; sintering machine flue gas is divided into high-sulfur high-temperature flue gas and low-sulfur low-temperature flue gas, which are treated separately.

[0053] The temperature of the high-sulfur high-temperature flue gas is relatively high, usually about 230°C, and the high-sulfur high-temperature flue gas is introduced into the SCR denitrification device 3 for SCR denitrification treatment; the denitrified flue gas is dedusted by the first dust removal device 5 (After the high-sulfur high-temperature flue gas has been denitrified and dedusted, its temperature is about 220°C), it enters the heat exchanger 7, and...

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Abstract

The invention provides a system and a method for comprehensive treatment for flue gas of a sintering plant, and an application. The method comprises the following steps: sequentially carrying out denitration treatment and dust removal treatment on the high-sulphur-content high-temperature flue gas, then cooling the high-sulphur-content high-temperature flue gas subjected to the denitration treatment and the dust removal treatment, then carrying out desulfuration treatment on the high-sulphur-content high-temperature flue gas, and finally heating the flue gas subjected to the desulfuration treatment and then discharging the flue gas; carrying out dust removal treatment on the low-sulphur-content low-temperature flue gas, and then discharging the flue gas subjected to the treatment; cooling the high-temperature section flue gas in a waste heat boiler, and then circulating the high-temperature section flue gas to a cooling material chamber of a cooler; leading a part of the low-temperature section flue gas to a space above a sintering material layer of a sintering machine; and leading a part of the low-temperature section flue gas to a return air duct of the waste heat boiler. According to the invention, flue gas waste heat recovery, flue gas dust removal, flue gas desulfuration, flue gas denitration and hot air sintering are considered as a whole, waste heat is furthest recovered and reasonably distributed and reutilized while the flue gas is cleaned, the heat efficiency of a sintering system is increased, and then energy conservation and emission reduction are realized.

Description

technical field [0001] The invention relates to a comprehensive flue gas treatment system, method and application of a sintering plant, belonging to the technical field of flue gas treatment. Background technique [0002] my country's steel production ranks first in the world for many years in a row, but the energy consumption and emission levels in the steel production process are far higher than the world's advanced level. Therefore, there is a huge potential for energy conservation and emission reduction. Iron ore sintering ranks second in energy consumption and first in emissions in the production process of iron and steel enterprises in my country, so it plays a decisive role in energy conservation and emission reduction in the iron and steel industry. The efficient recovery and utilization of waste heat resources in the sintering process is one of the main directions and ways to reduce the energy consumption of the sintering process. Therefore, it is of great signific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00
CPCY02P10/25Y02P80/15
Inventor 杨源满焦红蕾杨明华胡建红王元新
Owner BEIJING JINGCHENGKELIN ENVIRONMENTAL PROTECTION TECH