Desulphurization-denitration integrated method and apparatus for low temperature flue gas

A technology for desulfurization, denitrification, and low-temperature flue gas, which is applied to chemical instruments and methods, gas treatment, and separation methods. The effect of desulfurization and denitrification ability, improvement of removal efficiency and reduction of operation cost

Active Publication Date: 2017-06-16
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve H 2 o 2 When the oxidation flue gas is simultaneously desulfurized and denitrified, the utilization efficiency of the liquid phase feed is low, and the H 2 o 2 Insufficient activity; large amount of ozone oxidized flue gas, incomplete absorption when the amount is low, and unreasonable arrangement of the oxidation process lead to high operating costs for pollutant removal. A method and device for integrating low-temperature flue gas desulfurization and denitrification are provided.

Method used

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  • Desulphurization-denitration integrated method and apparatus for low temperature flue gas
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  • Desulphurization-denitration integrated method and apparatus for low temperature flue gas

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Embodiment 1

[0031] Such as figure 1 As shown, the structural schematic diagram of the first embodiment of the present invention is given. The method for the integration of low-temperature flue gas desulfurization and denitrification shown is composed of a plasma desulfurization and denitrification device and an ozone oxidation desulfurization and denitrification device. The plasma desulfurization and denitrification device consists of The plasma generator 1 is configured, and the plasma generator 1 is installed at the front end of the flue 5 . The ozone oxidation desulfurization and denitrification device is composed of a gas tank 2, a regulating valve 3, and an ozone generator 4. A cavity or oxygen is stored in the gas tank 2 as a gas source for preparing ozone. The regulating valve 3 is arranged on the gas tank 2 and the ozone generator On the pipeline between the devices 4, in order to realize the adjustment of the gas flow. The ozone generated by the ozone generator 4 is passed into ...

Embodiment 2

[0034] Such as figure 2 As shown, the structural schematic diagram of the second embodiment of the present invention is given. The integrated method of low-temperature flue gas desulfurization and denitrification shown is composed of a plasma desulfurization and denitrification device, a hydrogen peroxide catalytic activation desulfurization and denitrification device, and a plasma desulfurization and denitrification device. It consists of a plasma generator 1 and is installed at the front end of the flue. The hydrogen peroxide catalytically activated desulfurization and denitrification device is composed of a hydrogen peroxide storage tank 7, a feed pump 8, a heater 9, a carrier gas tank 10, a fan 11, a preheater 12, and a catalyst device 13. Liquid hydrogen peroxide is stored in the hydrogen peroxide storage tank 7. The feed pump 8 is used to pump the liquid hydrogen peroxide in the hydrogen peroxide storage tank 7 into the heater 9, and the heater 9 is used to heat the hyd...

Embodiment 3

[0038] Such as image 3 As shown, the structural schematic diagram of the third embodiment of the present invention is given. The integrated method of low-temperature flue gas desulfurization and denitrification shown is composed of a hydrogen peroxide catalytic activation desulfurization and denitrification device and an ozone oxidation desulfurization and denitrification device. The hydrogen peroxide catalytic activation desulfurization and denitrification device The device is arranged at the front end of the ozone oxidation desulfurization and denitrification device. The ozone oxidation desulfurization and denitrification device is the same as that in Embodiment 1, and the hydrogen peroxide catalytic activation desulfurization and denitrification device is the same as that in Embodiment 2, and will not be repeated here.

[0039] During the working process, the flue gas first removes most of the SO by hydroxyl radicals and hydrogen peroxide 2 and a small amount of NO, this ...

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Abstract

The invention provides a desulphurization-denitration integrated method for low temperature flue gas. Two or three apparatuses selected from a group consisting of a plasma desulphurization-denitration apparatus, a hydrogen-peroxide catalytic-activation desulphurization-denitration apparatus and an ozone oxidation desulphurization-denitration apparatus are integrated onto a to-be-treated flue. In a scheme which employs the plasma desulphurization-denitration apparatus, the plasma desulphurization-denitration apparatus is arranged at the forefront of the flue; and in the condition that the hydrogen-peroxide catalytic-activation desulphurization-denitration apparatus and the ozone oxidation desulphurization-denitration apparatus both exist, the hydrogen-peroxide catalytic-activation desulphurization-denitration apparatus is located at the front end. According to the method provided by the invention, two or three technologies selected from a group consisting of a plasma desulphurization-denitration technology, a H2O2 catalytic-activation desulphurization-denitration technology and an ozone advanced-oxidation desulphurization-denitration technology are applied in one scheme, and the three desulphurization-denitration technologies can be cooperated and adjusted according different conditions of flue gas, so the removal efficiency of NOx is improved, and desulphurization-denitration operation cost is reduced.

Description

technical field [0001] The present invention relates to a method and device for desulfurization and denitrification, and more specifically, to a method and device for integrating low-temperature flue gas desulfurization and denitrification. Background technique [0002] Nitrogen oxides and sulfur oxides produced by fossil fuel combustion are the main components of air pollutants. They can form acid rain and photochemical smog, and can lead to severe haze weather, which is very harmful to living organisms. Such pollutants have seriously affected human life and health and the living environment, so controlling and eliminating the emissions of nitrogen oxides and sulfur oxides is an urgent need for people. [0003] At present, ammonia selective catalytic reduction (SCR) technology is widely used in flue gas denitrification at high temperature (300-400°C), which requires the temperature of flue gas to be kept at 300-400°C to maintain the activity of the catalyst. Limestone-gyps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/60
CPCB01D53/32B01D53/60B01D53/75B01D2258/0283Y02A50/20
Inventor 张昭良蔡连国李壮壮辛颖李倩
Owner UNIV OF JINAN
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