System for purifying flue gas and recovering sulfur and technique

A technology for flue gas purification and sulfur recovery, which is applied in the fields of chemical process technology and equipment, air purification and environmental protection equipment, and can solve the problem of limited height, large-scale and flue gas processing capacity, centripetal motion, centrifugal motion is not clear, heat energy recovery and utilization Incomplete functions, etc., to achieve the effect of integrated utilization and recovery of thermal energy, stable and fast transportation, and saving equipment investment and operating costs

Inactive Publication Date: 2008-10-01
SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flue gas flux purified by the cross-flow moving bed adsorber with rectangular cross-section is lower than that of the cylindrical radial bed, and the centripetal and centrifugal motions are not clear; the particle layer of the cylindrical desulfurization moving bed adsorber is thicker, and the pressure drop is higher. The gas distribution components and particle movement control components need to be improved to improve the uniformity of axial gas distribution and reduce the particle wear rate and particle velocity gradient when moving down; the single-stage desulfurization of the adsorber leads to low utilization efficiency of the adsorbent, and the desulfurization rate and The flue gas treatment capacity needs to be improved; the heat

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  • System for purifying flue gas and recovering sulfur and technique
  • System for purifying flue gas and recovering sulfur and technique

Examples

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Embodiment 1

[0064] (10) Example 1: SO 2 Removal and purification and sulfur recovery

[0065] In this example, the flue gas purification and sulfur recovery system is designed to be used on a single-unit 600MW supercritical coal-fired unit in a coal-fired power plant. The flue gas volume of the coal-fired unit is 1.8×10 6 m 3 / h, the designed flue gas volume is 2.0×10 6 m 3 / h, single adsorber 1 treatment, design flue gas space velocity 1000h -1 . SO in flue gas components 2 The content is 1000-4000ppm, NO x The content is 200-800ppm, the adsorption temperature is 120-150°C, and the desorption temperature is 350-450°C; the adsorbent used is ZL50 columnar desulfurization and denitrification activated carbon with a diameter of 5mm produced by Shanxi Xinhua Environmental Protection (Chemical) Co., Ltd., or a 10mm diameter activated carbon ZL100 columnar desulfurization and denitrification activated carbon. The upper and lower sections of the single adsorber 1 are equivalent to the tr...

Embodiment 2

[0068] (11) Example 2: Broad-spectrum purification of sulfur and nitrogen double depletion and sulfur recovery

[0069] In this example, the flue gas purification and sulfur recovery system is designed to be used on a single-unit 600MW supercritical coal-fired unit in a coal-fired power plant. The flue gas volume of the coal-fired unit is 1.8×10 6 m 3 / h, the designed flue gas volume is 2.0×10 6 m 3 / h, single adsorber 1 treatment, SO in flue gas components 2 The content is 1000-4000ppm, NO xThe content is 200-800ppm, CO 2 The gas content is about 13%, and it also contains some toxic heavy metal ions such as mercury and cadmium, which are harmful smoke and dust. Design two working conditions: Working condition 1 is flue gas air velocity 1000h -1 At this time, the adsorption temperature, desorption temperature, design parameters and activated carbon loading are the same as in Example 1; working condition 2 is flue gas space velocity 500h -1 , At this time, the adsorption...

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Abstract

The invention provides a flue gas purification and sulphur recovery system and a process, comprising an adsorber, a desorber, an adsorbent delivery system, a heat energy integrated recovery system and a carbon powder separation and recovery system; meanwhile, suitable processing methods are adopted. The adsorber adopts a single-device dual-section radial staggered moving bed shaped like a reversed u and selective wide spectrum purification; the desorber adopts an axial reflux moving bed to realize the integrated recovery and utilization of the heat energy, regeneration of the adsorbent and the recovery of sulphur resource; the adsorbent adopts dense phase pneumatic conveying, thus leading the system to run continuously and stably; the flue gas purification and the sulphur recovery are realized by the carbon-based column-shaped or sphere-shaped desulfurization and denitration adsorbent. The system effectively integrates the energy-saving, exhaust and consumption reduction and resource recovery and utilization together, and has the advantages of high-effect wide spectrum purification and sulphur resource recovery, good gas distribution, grain movement and low pressure reduction, integrated recovery and utilization of heat energy, delivering the absorbent with no mechanical parts, continuous and stable operation of system, saving equipment investment and operation expense, etc.

Description

technical field [0001] The invention is a method for treating SO in coal-burning flue gas, sintering machine flue gas, metal smelting waste gas, sulfuric acid production tail gas, waste incineration and fuel oil waste gas. 2 , NO x The moving bed resource flue gas purification and sulfur recovery system and process for broad-spectrum purification of heavy metal ions and harmful smoke dust belong to air purification and environmental protection equipment, chemical process technology and equipment. Background technique [0002] SO2 is contained in flue gas and waste gas discharged from coal-fired power plants, metal smelters, coal-fired boiler plants, waste incineration and fuel oil processes 2 , SO 3 , NO x , heavy metal ions, harmful smoke and dust, causing acid rain hazards, ozone layer destruction, greenhouse effect, photochemical smog, human health hazards, building corrosion, etc., seriously endangering human production and life, and causing huge economic losses. Glo...

Claims

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Application Information

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IPC IPC(8): B01D53/04C01B31/20C01B31/18C01B17/56C01B32/40C01B32/50
CPCY02P20/50
Inventor 王金福高继贤王铁峰程易金涌
Owner SHANGHAI LONGKING ENVIRONMENTAL PROTECTION
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