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Flue gas cleaning system capable of switching pollutant desorption technology and adsorbent regeneration technology and method thereof

A flue gas purification system and adsorbent regeneration technology, which is applied in the field of flue gas purification, can solve the problems of inability to remove multiple pollutants synergistically, no reasonable adsorbent regeneration, and high requirements for manufacturing materials, so as to save equipment investment and operation cost, increase sulfur capacity and use efficiency, good continuity effect

Active Publication Date: 2013-04-03
SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process uses a device that integrates removal and regeneration, but this method is only for SO 2 The removal of various pollutants cannot be carried out synergistically; and this method does not use a reasonable heat source to regenerate the adsorbent. The washing regeneration method requires a large amount of water, and the washing liquid contains acid, which is easy to cause secondary pollution. Corrosiveness, high requirements for equipment manufacturing materials, large investment, and brings certain difficulties to maintenance work

Method used

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  • Flue gas cleaning system capable of switching pollutant desorption technology and adsorbent regeneration technology and method thereof
  • Flue gas cleaning system capable of switching pollutant desorption technology and adsorbent regeneration technology and method thereof
  • Flue gas cleaning system capable of switching pollutant desorption technology and adsorbent regeneration technology and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0108] Such as figure 2 As shown, in this example, the flue gas purification and adsorbent regeneration system is designed for the actual flue gas volume of 200,000 to 300,000 Nm 3 / h small boiler, designed to handle flue gas volume of 300,000 Nm 3 / h, depending on the situation, two radial fixed bed reactors 1 are used in parallel for flue gas treatment, one for removal and one for regeneration. SO in general flue gas components 2 The content is 100~15000mg / Nm 3 , NO x The content is 100~2000mg / Nm 3 , It also contains some toxic heavy metal ions such as mercury and cadmium. The removal temperature is 70-150°C, and the regeneration temperature is 300-450°C; the adsorption catalyst used is columnar activated semi-coke with qualified performance and economic benefits. Through the radial fixed bed reactor 1, remove SO in the flue gas 2 , NO X , mercury, dioxin and other pollutants, and realize the joint removal of multiple pollutants in one adsorption reactor.

[0109] ...

Embodiment 2

[0113] Such as image 3 As shown, in this example, the flue gas purification and adsorbent regeneration system is designed for the actual flue gas volume of 500,000 to 700,000 Nm 3 / h of non-ferrous smelting flue gas, designed to handle flue gas volume of 600,000 Nm 3 / h, depending on the situation, three radial fixed-bed reactors 1 are used in parallel for treatment, two for removal and one for regeneration. SO in general flue gas components 2 The content is 100~15000mg / Nm 3 , NO X The content is 100~2000mg / Nm 3 , It also contains some toxic heavy metal ions such as mercury and cadmium. The removal temperature is 70-150°C, and the regeneration temperature is 300-450°C; the adsorption catalyst used is columnar activated semi-coke with qualified performance and economic benefits. Through the radial fixed bed reactor 1, remove SO in the flue gas 2 , NO X , mercury, dioxin and other pollutants, and realize the joint removal of multiple pollutants in one adsorption reactor...

Embodiment 3

[0124] When the amount of flue gas to be treated increases, more than 3 fixed bed reactors can be used in series / parallel connection by setting the flue gas valve to be purified and the flue gas valve to be purified, such as Figure 4 As shown, the flue gas purification and adsorbent regeneration system designed in this example is used in a coal-fired thermal power unit with a single unit of 600 MW in a coal-fired power plant, and the actual flue gas volume is 1 to 2 million Nm 3 / h, designed to handle flue gas volume of 1.8 million Nm 3 / h, for 8 serial / parallel radial fixed bed reactors 1 pollutant removal process / adsorbent regeneration process switching.

[0125] For the situation that the number of fixed-bed reactors 1 is more than 3, the connection relationship between the flue gas valve to be purified, the clean flue gas valve and the fixed-bed reactor 1 performs the flue gas pollutant removal process, the adsorbent regeneration process and The switching process therebe...

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Abstract

The invention provides a flue gas cleaning system capable of switching a pollutant desorption technology and an adsorbent regeneration technology. The system comprises two or more fixed bed reactors, a regenerative heating device which is used for adsorbent regeneration, and a to-be-cleaned flue gas valve and a flue gas cleaning valve which are used for controlling switching between the pollutant desorption technology and the adsorbent regeneration technology, wherein each of the fixed bed reactor is internally provided with a central tube connected with a flue gas inlet, as well as a first adsorption layer and a second adsorption layer which are used for cleaning flue gas and arranged on the outer side of the central tube; and the upper end of the central tube is connected with a flue gas outlet. The invention further discloses a flue gas cleaning method using the system. The system can be used for performing the flue gas pollutant desorption technology and the adsorbent regeneration technology in one fixed bed reactor, and achieve the switching between the pollutant desorption technology and the adsorbent regeneration technology in the different fixed bed reactors.

Description

technical field [0001] The invention belongs to the field of flue gas purification, and in particular relates to a flue gas purification system and method with switchable pollutant removal process / adsorbent regeneration process, which is suitable for coal-fired thermal power plants, coal-fired boilers, ironmaking sintering machines, Flue gas purification in the fields of nonferrous metallurgy and chemical building materials. Background technique [0002] my country's primary energy is mainly coal. As a non-clean fuel, 84% of coal in my country is directly burned, resulting in soot-based air pollution in my country and producing a large amount of sulfur oxides and nitrogen oxides. and dust, leading to air pollution such as acid rain, greenhouse effect and ozone layer destruction, seriously affecting the living environment of human beings. Activated coke (semi-coke, charcoal) combined with desulfurization and denitrification emerged as an integrated purification technology. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 高继贤李静阎冬杨春琪何永胜洪小松
Owner SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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