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Integrated device and method for denitration and dioxin removal of sintering flue gas and utilization of waste heat

A technology for removing dioxins and sintering flue gas, which is applied in the field of sintering flue gas denitrification and dioxin removal and sintering flue gas waste heat utilization, sintering flue gas denitrification, dioxins, and waste heat utilization integrated devices, which can solve operating costs High, energy consumption and other issues, to achieve the effect of prolonging life

Inactive Publication Date: 2018-05-29
ZHONGYE-CHANGTIAN INT ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high energy consumption and high operating cost in the above-mentioned prior art, the purpose of the present invention is to provide a device that integrates sintering flue gas denitrification, dioxin removal and waste heat utilization with less energy consumption and lower operating cost. method

Method used

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  • Integrated device and method for denitration and dioxin removal of sintering flue gas and utilization of waste heat
  • Integrated device and method for denitration and dioxin removal of sintering flue gas and utilization of waste heat
  • Integrated device and method for denitration and dioxin removal of sintering flue gas and utilization of waste heat

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Embodiment approach

[0069]According to the first embodiment of the present invention, an integrated device for sintering flue gas denitrification, dioxin removal and waste heat utilization is provided:

[0070] An integrated device for sintering flue gas denitration and dioxin removal and waste heat utilization, the device includes a sintering cooler 1 and a flue gas pipeline L1 communicating with the sintering cooler 1 . According to the flue gas flow direction, the flue gas pipeline L1 is equipped with a high-parameter superheater 2, a first high-parameter evaporator 3, an ammonia injection grid 4, an SCR reactor 5, a second high-parameter evaporator 6, and a low-parameter superheater. 7, high-parameter economizer 8, low-parameter evaporator 9 and low-parameter economizer 10. The device also includes a high-parameter drum 10 and a low-parameter drum 11 arranged at the side of the flue gas pipeline L1. The outlet 1002 of the low-parameter economizer 10 is connected to the first inlet 1201 of th...

Embodiment 1

[0108] like figure 1 , an integrated device for sintering flue gas denitrification, dioxin removal and waste heat utilization, the device includes a sintering cooler 1 and a flue gas pipeline L1 communicating with the sintering cooler 1 . According to the flue gas flow direction, the flue gas pipeline L1 is equipped with a high-parameter superheater 2, a first high-parameter evaporator 3, an ammonia injection grid 4, an SCR reactor 5, a second high-parameter evaporator 6, and a low-parameter superheater. 7, high-parameter economizer 8, low-parameter evaporator 9 and low-parameter economizer 10. The device also includes a high-parameter drum 11 and a low-parameter drum 12 arranged at the side of the flue gas pipeline L1. The outlet 1002 of the low-parameter economizer 10 is connected to the first inlet 1201 of the low-parameter drum 12 . The first outlet 1202 of the low parameter drum 12 is connected to the inlet 901 of the low parameter evaporator 9 . The outlet 902 of the ...

Embodiment 2

[0126] Repeat Example 1, just as image 3 , the vertical cooler A1 is provided with a first radiant heat recovery device F01 below the tower top cover 103 and close to the tower body top cover 103 . At the front end of the hot air outlet 108, a second radiant heat recoverer F01a is provided. like Figure 10 , the first radiant heat recovery device F01 adopts a fan-shaped hollow plate. like Figure 11 , the second radiant heat recovery device F01a adopts a tube-and-tube heat exchanger.

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Abstract

The invention provides an integrated device and method for denitration and dioxin removal of sintering flue gas and utilization of waste heat. The device comprises a sinter cooling machine and a fluegas pipeline which communicates with the sinter cooling machine; the flue gas pipeline is provided with a high-parameter superheater, a first high-parameter evaporator, an ammonia injection grid, an SCR reactor, a second high-parameter evaporator, a low-parameter superheater, a high-parameter coal economizer, a low-parameter evaporator and a low-parameter coal economizer in the flue gas flow direction in sequence; and the device further comprises a high-parameter boiler barrel and a low-parameter boiler barrel which are arranged on the side of the flue gas pipeline. According to the integrateddevice provided by the invention, sintering untreated gas enters a denitration system after passing through the sinter cooling machine and sinter for heat exchange, and NOx-containing flue gas does not need to be additionally heated; the cost for dioxin removal by SCR denitration is reduced, and meanwhile the utilization rate of the waste heat of the sinter is improved.

Description

technical field [0001] The invention relates to a process for denitrification and dioxin removal of sintering flue gas and waste heat utilization of sintering flue gas, in particular to an integrated device and method for denitrification and dioxin removal of sintering flue gas and waste heat utilization, which belongs to the environmental protection and waste heat utilization of steel sintering production field. technical background [0002] Sintering production is one of the most important process units in modern steel production, and it is also a major polluter in the steel industry. Sintering process NO X Emissions account for about X Dioxins from sintering and electric furnaces in the iron and steel industry accounted for 50% of the total emissions, accounting for 25.9% of the country's total dioxin emissions. With the increasing environmental protection requirements in our country, not only for sintering flue gas dust and SO 2 emissions are more stringent, while th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00
CPCF27D17/004F27D17/008Y02P10/25
Inventor 徐忠
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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