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Flue gas denitration and desulfurization technology with energy-saving effect

A desulfurization process and flue gas technology, which is applied in the field of flue gas denitration and desulfurization process, can solve the problems such as the inability to perform circulating spraying of lye, heat loss of flue gas, waste of energy, etc., so as to save resources, improve utilization rate, and prevent environmental pollution Effect

Inactive Publication Date: 2019-03-22
天津浩创节能环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, the temperature range of the flue gas discharged from the coke oven is 200-300°C, which is relatively high. During the denitrification and desulfurization process, the flue gas is generally desulfurized first and then denitrified. After desulfurization, the temperature of the flue gas will be greatly reduced. Most of the heat in the flue gas is lost, and when denitrification is performed, a heater is required to heat the denitrification tower, which wastes energy. The lye in some desulfurization towers cannot be circulated and sprayed, wasting resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An energy-saving flue gas denitrification and desulfurization process, comprising the following steps:

[0036] S1: Flue gas dust removal

[0037] Pass the flue gas into the flue gas dust removal device, filter the dust in the flue gas through the dust removal device, collect the filtered dust, and clean the collected dust regularly;

[0038] S2: Catalytic reduction method denitrification

[0039] Heat the inside of the denitrification tower, and discharge the flue gas after dedusting into the denitrification tower. The temperature of the flue gas is 200-300 ℃, which can increase the temperature in the denitrification tower and help SCR denitrification. The catalyst in the denitrification tower is SO in flue gas 2 Carry out reduction, the water generated during the reduction process is filtered through the filter layer and then discharged;

[0040] S3: waste heat recovery

[0041] The flue gas after denitrification is discharged into the waste heat boiler, and the w...

Embodiment 2

[0050] An energy-saving flue gas denitrification and desulfurization process, comprising the following steps:

[0051] S1: Flue gas dust removal

[0052] Pass the flue gas into the flue gas dust removal device, filter the dust in the flue gas through the dust removal device, collect the filtered dust, and clean the collected dust regularly;

[0053] S2: Catalytic reduction method denitrification

[0054] Heat the inside of the denitrification tower, and discharge the flue gas after dedusting into the denitrification tower. The temperature of the flue gas is 200-300 ℃, which can increase the temperature in the denitrification tower and help SCR denitrification. The catalyst in the denitrification tower is SO in flue gas 2 Carry out reduction, the water generated during the reduction process is filtered through the filter layer and then discharged;

[0055] S3: waste heat recovery

[0056] The flue gas after denitrification is discharged into the waste heat boiler, and the w...

Embodiment 3

[0065] An energy-saving flue gas denitrification and desulfurization process, comprising the following steps:

[0066] S1: Flue gas dust removal

[0067] Pass the flue gas into the flue gas dust removal device, filter the dust in the flue gas through the dust removal device, collect the filtered dust, and clean the collected dust regularly;

[0068] S2: Catalytic reduction method denitrification

[0069] Heat the inside of the denitrification tower, and discharge the flue gas after dedusting into the denitrification tower. The temperature of the flue gas is 200-300 ℃, which can increase the temperature in the denitrification tower and help SCR denitrification. The catalyst in the denitrification tower is SO in flue gas 2 Carry out reduction, the water generated during the reduction process is filtered through the filter layer and then discharged;

[0070] S3: waste heat recovery

[0071]The flue gas after denitrification is discharged into the waste heat boiler, and the wa...

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PUM

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Abstract

The invention relates to a flue gas denitration and desulfurization technology with an energy-saving effect. The flue gas denitration and desulfurization technology comprises the following steps: S1)removing flue gas dust; S2) adopting a catalytic reduction method for denitration; S3) recovering waste heat; S4) performing wet desulphurization. According to the invention, desulphurization is performed after denitration, so that heat in flue gas can be fully utilized, denitration can be boosted and energy can be saved; and meanwhile, waste heat in flue gas is recycled and reused, so that temperature of gas discharged after denitration and desulfurization is relatively low; water generated during denitration process is filtered, so that environment can be prevented from being polluted; alkali liquor during desulfurization process can be circularly sprayed, so that the use ratio of alkali liquor can be increased and resource can be saved.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to an energy-saving flue gas denitrification and desulfurization process. Background technique [0002] Generally, the temperature range of the flue gas discharged from the coke oven is 200-300°C, which is relatively high. During the denitrification and desulfurization process, the flue gas is generally desulfurized first and then denitrified. After desulfurization, the temperature of the flue gas will be greatly reduced. Most of the heat in the flue gas is lost, and after denitrification, a heater is required to heat the denitrification tower, which wastes energy. The lye in some desulfurization towers cannot be sprayed circularly, wasting resources. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art and provide a flue gas denitrification and desulfurization process with energy saving effect. [0004] In order to ach...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01D53/86B01D53/78B01D53/50B01D46/30B01D53/56
CPCB01D46/30B01D53/50B01D53/78B01D53/8625B01D53/96B01D2255/20707B01D2255/20723B01D2255/20769B01D2255/20776B01D2258/0283
Inventor 田晓亮田永军田浩
Owner 天津浩创节能环保设备有限公司