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A device for removing arsenic and mercury in flue gas and a method for removing arsenic and mercury

A flue gas and removal technology, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., to achieve the effect of low cost

Active Publication Date: 2015-10-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the simultaneous prevention and control methods and devices for the two most harmful heavy metal elements, arsenic and mercury, in flue gas emissions.

Method used

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  • A device for removing arsenic and mercury in flue gas and a method for removing arsenic and mercury

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Embodiment Construction

[0024] The method and device of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] see figure 1 , a device for simultaneously removing arsenic and mercury in flue gas by using magnetic beads in fly ash and calcium-rich ash, including: furnace 1, denitrification system 2, dust collector 3, desulfurization system 4, chimney 5, magnetic separation separator 6. Mechanical screening machine 7. High temperature regeneration furnace 8. Injection system 9. On the conventional flue gas pollutant control device of the power plant, the present invention adds four sets of systems, including magnetic bead separation, calcium-rich ash separation, Magnetic beads and calcium-rich ash activation regeneration, injection, adsorption arsenic and catalytic oxidation demercury and other links of the circulation device.

[0026] The high-temperature regeneration furnace 8 of the device can also be removed, but the removal efficiency of t...

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Abstract

The invention discloses a device of removing arsenic and mercury in flue gas. The device comprises a denitration system, a dust remover, a magnetic separator, a mechanical screening machine and an injection system, wherein the denitration system is connected to a hearth, the outlet of the denitration system is connected to the inlet of the dust remover, the dust remover is connected to the magnetic separator and the mechanical screening machine, and the magnetic separator and the mechanical screening machine are connected to a pipeline at the front of the inlet of the denitration system through the injection system. The invention further discloses a method of recycling magnetic beads and calcium-rich ash in fly ash, and simultaneously removing the arsenic and the mercury in the flue gas by utilizing the device. According to the method provided by the invention, the gaseous arsenic in the flue gas is effectively removed, the elemental mercury in the flue gas is subjected to catalytic oxidation, and the method and the device of simultaneously removing two heavy metal pollutants containing the arsenic and the mercury in the flue gas can be provided; the magnetic beads and the calcium-rich ash are recycled.

Description

technical field [0001] The invention belongs to the field of emission control of coal-burning flue gas pollutants, in particular to a method for simultaneously removing two heavy metal pollutants, arsenic and mercury, in flue gas by using self-owned magnetic beads and calcium-rich ash in cheap coal-burning fly ash Apparatus and methods. Background technique [0002] Arsenic and mercury are extremely harmful global pollutants with strong bioaccumulation, carcinogenic and teratogenicity, and are major environmental problems that threaten human health and ecological security. The consumption of a large amount of coal around the world has made coal burning the most important source of man-made emissions of arsenic and mercury. The United Nations Environment Program assessment report in 2005 pointed out that the direct emissions of mercury to the atmosphere from human sources in China were 825.2 tons, of which the anthropogenic mercury emissions were mainly from coal burning, ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/88B01D53/83B01D53/64B01D53/46B01D53/96
Inventor 张凯华张冬雪张锴
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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