Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation

A catalytic oxidation, desulfurization and denitrification technology, applied in the fields of chemical technology and gas pollutant treatment, can solve the problems of explosion and low oxidation efficiency, and achieve the effect of improving the removal rate, enhancing the oxidation efficiency and reducing the concentration

Active Publication Date: 2013-12-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve H 2 o 2 Oxidation efficiency is low, and defects such as explosion may occur, providing a H-based 2 o 2 The device and method for simultaneous desulfurization and denitrification of flue gas by catalytic oxidation, the present invention makes further improvements on the basis of CN102327735, adding H 2 o 2 Catalytic decomposition device that makes H 2 o 2 Decomposition produces hydroxyl radicals, greatly increasing NO X and SO 2 removal rate, reducing the H 2 o 2 possibility of explosion

Method used

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  • Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation
  • Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation
  • Device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation

Examples

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Effect test

Embodiment 1

[0044] A H-based 2 o 2 A device for simultaneous desulfurization and denitrification of flue gas by catalytic oxidation, the device includes H 2 o 2 Tank 1, Syringe Pump 2, H 2 o 2 Nozzle 3 and H 2 o 2 Catalytic decomposition device 4, air blower 5 and active material nozzle 6; The H 2 o 2 Storage tank 1 is connected to syringe pump 2, and syringe pump 2 is connected to H 2 o 2 Nozzle 3 connected, H 2 o 2 Nozzle 3 installed with H 2 o 2 Inside the catalytic decomposition unit 4, H 2 o 2 One end of the catalytic decomposition device 4 is connected to the air blower 5, and the other end is connected to the active material nozzle 6 (such as figure 1 figure 2 ). h 2 o 2 into H via syringe pump 2 2 o 2 The catalytic decomposition device 4 reacts with the catalyst to produce a large amount of active substances. The active material is injected into the flue through the active material nozzle 6 along with the air from the air blower 5 to oxidize SO 2 and NO X ...

Embodiment 2

[0047] Such as Figure 4 As shown, the difference from Example 1 is that in the H 2 o 2 A preheating device 7 is arranged between the catalytic reaction device 4 and the blower 5, and the preheating device 7 is a shell-and-tube heat exchanger or a plate heat exchanger or a tube-sheet heat exchanger or a volumetric heat exchanger, etc., the The preheating device 7 mainly heats up the bypass airflow, and the bypass airflow with a higher temperature is more conducive to H 2 o 2 The dispersion of the solution on the surface of the catalyst also makes it easier for the active species and H on the surface of the catalyst to 2 o 2 The solution is injected into the flue, and the hot air flow of the preheating device comes from the flue gas.

[0048] When using the system of Example 2 to perform desulfurization and denitrification operations, wherein, H 2 o 2 The number of moles of solution injected is twice the number of moles of NO, and the oxidation time is 1 second. In this ...

Embodiment 3

[0050] Such as Image 6 As shown, the difference from Example 1 is that in the H 2 o 2 The outside of the catalytic reaction device 4 wraps a heating device 8, the heating device 8 is electric heating or steam heating or flue gas heating, etc., and the heating device 8 is mainly for H 2 o 2 The catalytic decomposition device heats up to make the H 2 o 2 Decomposition accelerates to produce more active substances, and more active substances are injected into the flue along with the bypass airflow to oxidize NO X and SO 2 . The electric heating or steam heating energy comes from the outside, and the flue gas in the flue gas heating comes from the part before the dust collector.

[0051] When using the system of Example 3 for desulfurization and denitrification operations, wherein, H 2 o 2 The number of moles of the injected amount of NO is twice the number of moles of NO, and the oxidation time is 1 second. In this embodiment, the flue gas temperature in the flue is 120...

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Abstract

The invention provides a device and method for smoke simultaneous desulfurization and denitrification based on hydrogen peroxide catalytic oxidation (H2O2). The H2O2 is sprayed into an H2O2 catalytic decomposition device through an injection pump and reacts with catalysts, a large amount of active matter is generated, the active matter is injected into a smoke channel along with a bypass air flow from an air blower in a blowing mode and reacts with sulfur dioxide (SO2) and oxynitride (NOX) in smoke to generate sulfuric acid and nitric acid. The sulfuric acid, the nitric acid and pollutants left in the smoke enter an ammonia absorption tower, and finally two kinds of important chemical fertilizer, namely ammonium sulfate and ammonium nitrate are generated. The device and method are suitable for smoke simultaneous desulfurization and denitrification in large, medium and small size boiler and reconstruction application of built combustion equipment, and the NOX and SO2 can be removed at the same time.

Description

technical field [0001] The invention belongs to the technical fields of chemical technology and gas pollutant treatment, and specifically relates to a H-based 2 o 2 A device and method for simultaneous desulfurization and denitrification of flue gas by catalytic oxidation. Background technique [0002] In recent years, my country's SO 2 and NO X The emissions of the pollutants are increasing day by day, and the pollution it brings is becoming more and more serious, and has produced a series of problems: the acid rain and photochemical smog formed by them seriously threaten human health and destroy the ecological environment. These pollutants have seriously affected the the lives of the people and the development of the national economy. Therefore, the control SO 2 and NO X emissions are imminent. [0003] At present, the combination of wet flue gas desulfurization (WFGD) and selective catalytic denitrification (SCR) is widely used in my country to desulfurize and deni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/60
CPCY02A50/20
Inventor 钟秦丁杰
Owner NANJING UNIV OF SCI & TECH
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