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Device and method for simultaneously desulfurizing and denitrating sintering smoke

A technology for desulfurization, denitrification, and sintering flue gas, which is applied in the field of flue gas purification, can solve the problems of complex equipment occupation, and achieve the effects of small footprint, simple process, and high desulfurization and denitration efficiency.

Inactive Publication Date: 2014-07-23
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet desulfurization and denitrification process has problems such as complex equipment and large footprint. At the same time, bubble reactors are rarely used in the field of sintering flue gas pollutant control. This method is not suitable for the transformation of existing processes.

Method used

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  • Device and method for simultaneously desulfurizing and denitrating sintering smoke

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0040]A simultaneous desulfurization and denitrification device for sintering flue gas, the device includes an ozone generator 1, a dilution fan 2, a mixing tank 3, an ozone distributor 4 and an SDA reaction tower 5; the outlets of the ozone generator 1 and the dilution fan 2 are both It is connected with the inlet of the mixing tank 3; the ozone distributor 4 is installed in the flue, and a connection port is arranged outside the flue so that the ozone distributor 4 is connected with the outlet of the mixing tank 3; the SDA reaction tower 5 is arranged on the top of the tower Both the flue gas inlet and the middle part are connected with the flue arranged with the ozone distributor 4 . The flue gas outlet of the SDA reaction tower 5 is connected with a bag filter 6 . An ash hopper 7 is arranged below the bag filter 6 to collect dust. A chimney 8 is arranged behind the bag filter 6 to discharge the purified flue gas. The distance between the flue where the ozone distributor ...

specific Embodiment 1

[0043] The simultaneous desulfurization and denitrification device for sintering flue gas as described above is used to perform desulfurization and denitrification, including the following steps:

[0044] The ozone produced by the ozone generator 1 and the cold air produced by the dilution fan 2 enter the mixing tank 3 for mixing, and then spray into the flue through the ozone distributor 4, and the injected ozone fully contacts with the flue gas to oxidize the NO in the flue gas to high valence NO x (with NO 2 or N 2 o 5 Mainly), the oxidized flue gas enters the SDA reaction tower 5 to react with the injected lime slurry to realize simultaneous removal of sulfur oxides and nitrogen oxides.

[0045] The distance between the flue gas inlet of the control flue at the position where the ozone distributor 4 is arranged and the SDA reaction tower 5 is 30 meters, and the mol ratio of the ozone produced by the ozone generator 1 and the NO in the flue gas is 1.0, and the controlled...

specific Embodiment 2

[0046] The simultaneous desulfurization and denitrification device for sintering flue gas as described above is used to perform desulfurization and denitrification, including the following steps:

[0047] The ozone produced by the ozone generator 1 and the cold air produced by the dilution fan 2 enter the mixing tank 3 for mixing, and then spray into the flue through the ozone distributor 4, and the injected ozone fully contacts with the flue gas to oxidize the NO in the flue gas to high valence NO x (with NO 2 or N 2 o 5 Mainly), the oxidized flue gas enters the SDA reaction tower 5 to react with the injected lime slurry to realize simultaneous removal of sulfur oxides and nitrogen oxides.

[0048] The distance between the flue gas inlet of the control flue at the position where the ozone distributor 4 is arranged and the SDA reaction tower 5 is 25 meters, and the mol ratio of the ozone produced by the ozone generator 1 and the NO in the flue gas is 0.8, and the controlled...

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Abstract

The invention discloses a device and a method for simultaneously desulfurizing and denitrating sintering smoke. The device comprises an ozone generator, a dilution fan, a mixing tank, an ozone distributor and an SDA (Strand Displacement Amplification) reaction tower, wherein outlets of the ozone generator and the dilution fan are connected with an inlet of a mixing tank; the ozone distributor is mounted in a smoke channel; ozone is uniformly distributed in the smoke channel; a connection opening is formed in the outer part of the smoke channel, so that the ozone distributor is connected with an outlet of the mixing tank; a smoke inlet of the SDA reaction tower is connected with the smoke channel with the ozone distributor; ozone generated by the ozone generator and cold air generated by the dilution fan are introduced into the mixing tank, mixed and then sprayed into the smoke channel through the ozone distributor; NO in the smoke is oxidized into high-valence NOx; the oxidized gas enters the SDA reaction tower and reacts with sprayed lime slurry, and thus simultaneously sulfur oxides and nitric oxide are removed. The device and the method are simple in process, excellent in performance, obvious in economic benefit and wide in application prospects.

Description

technical field [0001] The invention belongs to the field of flue gas purification, in particular to a device and method for simultaneous desulfurization and denitrification of sintering flue gas, and more particularly to a device and method for simultaneous desulfurization and denitration of flue gas from steel sintering. Background technique [0002] Sulfur dioxide and nitrogen oxides are the key precursors of haze air pollution. my country's iron and steel industry SO 2 The emissions are second only to power plant boilers and industrial boilers, ranking third. NO x The emissions are second only to power plant boilers and cement kilns, ranking third. SO emissions from the steel industry 2 and NO x More than 50% of it comes from the sintering process. In 2012, the "Steel Sintering and Pelletizing Industry Air Pollutant Emission Standard" began to be officially implemented. Compared with the original standard, this standard is SO 2 Emission standards have been greatly...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/60B01D53/80B01D46/02
CPCY02A50/20
Inventor 朱廷钰王丽英徐文青赵瑞壮周璇刘文刘莉常治铁张庆文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI