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A device for activating flue gas mercury removal agent and its application

A flue gas and electrode activation technology, which is applied in the flue gas mercury removal agent activation device and the flue gas mercury emission control field, can solve the problems of increased usage, secondary pollution, and high activity, saving equipment costs and improving energy. , the effect of low cost

Active Publication Date: 2015-10-14
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If elemental bromine and elemental iodine are used, although zero-valent mercury can be converted more effectively, their activity is high, which may cause secondary pollution, and if halides such as bromide or iodide are used, their activity is low. Its mercury removal efficiency is bound to increase its usage, which will also lead to secondary pollution

Method used

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  • A device for activating flue gas mercury removal agent and its application
  • A device for activating flue gas mercury removal agent and its application
  • A device for activating flue gas mercury removal agent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment adopts a circular stainless steel cylinder with an internal diameter of 150mm as the main body of the mercury removal agent activation device, and its length is 2100mm. The length of the new activation electrode outer cylinder is 1800mm, and the length of the inner cylinder is 2400mm. The angular distance is 51mm, and the distance between the tip and the inner wall of the mercury removal activation device is 49.5mm. An air heating device is installed upstream of the mercury removal activation device, and the hot simulated flue gas ([NO]=200ppm, [Hg 0 ] = 20μg / m 3 , [SO 2 ]=1000ppm, the rest is hot air at 150℃ heated by electric furnace) at 40m 3 The flow rate of / h is continuously passed into the flue. The mercury removal agent uses gaseous hydrogen chloride, and the injection concentration is 10ppmv. First of all, without turning on the high-voltage power supply, by detecting the concentration of zero-valent mercury in the tail gas before and after ...

Embodiment 2

[0034] The device and method are the same as in Example 1, except that the mercury removal agent is changed to gaseous hydrogen bromide, and after hydrogen bromide is sprayed into the flue gas, the concentration in the simulated flue gas is 2ppmv. When no voltage is applied, the removal efficiency of zero-valent mercury in the flue gas is 10%; gradually adjust the voltage to 8.0kV, the removal efficiency of zero-valent mercury reaches about 80%; further adjust the voltage to 9.0kV, zero-valent mercury The removal efficiency of mercury reached about 95%.

Embodiment 3

[0036] Such as Figure 1~3 As shown, a device for activating a mercury removal agent for flue gas, the device includes a mercury removal agent storage tank 1, a flow controller 2, a mercury removal agent delivery pipe 3, a mercury removal agent activation device 4, a power connection line 7, High-voltage power supply 8, ground wire 9, the mercury removal agent storage tank 1 is connected to the mercury removal agent activation device 4 through the mercury removal agent delivery pipe 3, and a flow controller 2 is arranged on the mercury removal agent delivery pipe,

[0037]The mercury removal agent activating device 4 includes a cylindrical casing made of metal, an activation electrode 5 placed inside the casing, and activating device covers 6 provided on the top and bottom of the casing. The activation electrode 5 is composed of an electrode outer tube 10 and an electrode inner tube 11; the electrode outer tube 10 is made of metal, and its shape is a star-shaped columnar struc...

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Abstract

The invention relates to a smoke mercury removal agent activation device and application thereof. The device comprises a mercury removal agent storage tank (1), a flow controller (2), a mercury removal agent conveying pipe (3), a mercury removal agent activator (4), a power connection wire (7), a high voltage power supply (8) and a grounding wire (9), wherein the mercury removal agent storage tank (1) is connected to the mercury removal agent activator (4) through the mercury removal agent conveying pipe (3), the flow controller (2) is arranged on a pipeline of the mercury removal agent conveying pipe (3), the mercury removal agent activator (4) is connected with the high voltage power supply (8) through the power connection wire (7) and is connected with a ground wire through the grounding wire (9), and a smoke inlet is arranged at the bottom of the mercury removal agent activator (4) while a smoke outlet is arranged at the top of the mercury removal agent activator (4). Compared with the prior art, the smoke mercury removal agent activation device can remarkably improve the activity and the mercury removal efficiency of a mercury removal agent and is also capable of lowering the usage amount of the mercury removal agent and the possible risk of secondary pollution.

Description

technical field [0001] The invention relates to a flue gas mercury emission control technology in the field of environmental protection, in particular to a device for activating a flue gas mercury removal agent and its application. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection and the hazards of mercury, more and more countries have begun to pay attention to the pollution of heavy metal mercury. In October 2013, an international convention on mercury is about to be signed. As the world's largest mercury emitter, my country is facing severe pressure to reduce mercury emissions. [0003] The current international mainstream flue gas mercury removal technology mainly sprays activated carbon or oxidant into the flue gas to remove zero-valent mercury (Hg 0 ) adsorption into particulate mercury (Hg p ) or oxidized to divalent mercury (Hg 2+ ), and then the converted particulate mercury (Hg p ) or divalent mer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/64B01D53/76
Inventor 瞿赞晏乃强
Owner SHANGHAI JIAOTONG UNIV
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