Device and method for removing mercury from boiler flue gas of power station

A technology for power plant boilers and flue gas, which is applied to combined devices, separation methods, chemical instruments and methods, etc., can solve the problems of high operating cost, low investment cost, affecting the comprehensive utilization of fly ash, etc., so as to increase the residence time, improve the Efficiency of mercury removal and effect of reducing operating cost of mercury removal

Inactive Publication Date: 2015-02-18
SHANGHAI BOILER WORKS
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Problems solved by technology

This method is characterized by low investment cost, but high operating cost, and the fly ash discharged from the ash hopper of

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  • Device and method for removing mercury from boiler flue gas of power station
  • Device and method for removing mercury from boiler flue gas of power station

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Embodiment Construction

[0036] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0037] figure 1It is a schematic diagram of a device for removing mercury from flue gas of a power plant boiler provided by the present invention. After the flue gas comes out of the air preheater, it enters the electrostatic precipitator 1 for dust removal. The bottom of the electrostatic precipitator area is provided with a coarse ash hopper 2, which is removed by recycling the electrostatic precipitator. coarse ash and most of the fine ash. The adsorbent is sprayed into the adsorbent injection area 4 between the electrostatic precipitator 1 and the bag filter 6 through the adsorbent injection device 3, and a static mixer 5 is arranged in the adsorbent injection area 4, and the flue gas enters the static mixing After the device 5, the adsorbent is fully dispersed in the flue gas and adsorbs and removes mercury therein. Then th...

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Abstract

The invention relates to a device and a method for removing mercury from a boiler flue gas of a power station, and belongs to the field of air pollutant control. The device disclosed by the invention comprises a dust removal system, an adsorbent injection system, an adsorbent delivery system and an adsorbent regeneration system, wherein an adsorbent injection orifice is formed between an electrostatic dust collector and a bag-type dust remover; the electrostatic dust collector takes charge of collecting coarse ashes and most of fine ashes; and the bag-type dust remover only collects the adsorbent and a few of fine granular fly ashes, and thus the quality of the fly ashes is not affected, and meanwhile, efficient dust collection is achieved. A certain ratio of fine ashes and adsorbent in a fine ash bucket are conveyed to a regeneration device to heat and regenerate in a cycle by using the mercury adsorption property of the fly ashes, and thus cyclic utilization of the adsorbent is achieved; the mercury removal efficiency is increased, and the mercury removal operation cost is obviously lowered.

Description

technical field [0001] The invention relates to a device and a method for removing mercury from flue gas of a power plant boiler, belonging to the field of air pollutant control. Background technique [0002] In recent years, the pollution of trace metal elements caused by rapid industrial development has attracted widespread attention, especially the mercury pollution crisis has become increasingly severe. Mercury, as a major global pollutant, stays in the atmosphere for a long time, is highly toxic, and has a bioaccumulative effect. It not only pollutes the ecological environment, but also enters the human body through breathing, skin contact, diet, etc., seriously endangering human beings. of good health. Mercury is mainly released into the environment through nature and human activities, among which coal combustion is the largest source of pollution emissions from human activities. Coal is the most important primary energy in my country, accounting for 75% of all energ...

Claims

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Application Information

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IPC IPC(8): B01D53/06B01D50/00
Inventor 韩坤坤倪建军肖琨张翔
Owner SHANGHAI BOILER WORKS
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