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Double-alkaline semi-dry flue gas desulfurization device and technique thereof

A desulfurization device, semi-dry technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of high operating costs and low desulfurization efficiency, and achieve low operating costs, low consumption, and high activity. Effect

Active Publication Date: 2012-05-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high operating cost of double-alkali flue gas desulfurization technology and low desulfurization efficiency of semi-dry flue gas desulfurization technology, and then provide a double-alkali semi-dry flue gas desulfurization device and craft

Method used

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  • Double-alkaline semi-dry flue gas desulfurization device and technique thereof
  • Double-alkaline semi-dry flue gas desulfurization device and technique thereof
  • Double-alkaline semi-dry flue gas desulfurization device and technique thereof

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the first desulfurization device of this embodiment includes a slaked lime slurry preparation device 1, a caustic soda solution preparation device 2, a mixed slurry preparation device 3, a slaked lime slurry pipe 4, a caustic soda solution pipe 5, a mixed slurry pipe 6, and a desulfurization tower 8. Multiple atomizing nozzles 9, dust removal equipment 11, material conveyor 12, gas flow pipe 13, exhaust pipe 14 and multiple pressure pipes with gas control valves matching the number of atomizing nozzles 9 7. The hydrated lime slurry preparer 1 communicates with the mixed slurry preparer 3 through the slaked lime slurry pipe 4, the caustic soda solution preparer 2 communicates with the mixed slurry preparer 3 through the caustic soda solution pipe 5, and the plurality of atomizing nozzles 9 Arranged in the desulfurization tower 8 along the height direction of the desulfurization tower 8, the...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination figure 1 Describe this embodiment, the difference between this embodiment and specific embodiment 1 is that the desulfurization device also has a plurality of process water supply pipes 15 and a plurality of valves 16, and the number of process water supply pipes 15 and valves 16 is the same as that of the branch pipe 6-2 The number of each process water supply pipe 15 is installed on the corresponding branch pipe 6-2 and communicated with the branch pipe 6-2. A valve 16 is installed on each process water supply pipe 15. Such setting facilitates the adjustment of the mass concentration of the mixed slurry. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific implementation mode three: combination figure 2To illustrate this embodiment, the second desulfurization device of this embodiment includes a slaked lime slurry preparation device 1, a caustic soda solution preparation device 2, a mixed slurry preparation device 3, a slaked lime slurry pipe 4, a caustic soda solution pipe 5, a mixed slurry pipe 6, a plurality of Atomizing nozzle 9, dedusting equipment 11, gas flow pipe 13, exhaust pipe 14 and a plurality of pressure pipes 7 with gas control valves matching the number of atomizing nozzles 9, the slaked lime slurry preparation device 1 The slaked lime slurry pipe 4 communicates with the mixed slurry preparation device 3, the caustic soda solution preparation device 2 communicates with the mixed slurry preparation device 3 through the caustic soda solution pipe 5, and the plurality of atomizing nozzles 9 are along the length direction of the exhaust gas pipeline 10 Arranged in the flue gas exhaust pipe 10, the mi...

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Abstract

The invention provides a double-alkaline semi-dry flue gas desulfurization device and a technique thereof, and relates to a double-alkaline flue gas desulfurization device and a technique thereof. The invention aims at solving the problems of high operating cost of the existing double-alkaline flue gas desulfurization technology and low desulfurization efficiency of the existing semi-dry flue gasdesulfurization technology. A first desulfurization device is provided with an atomizing nozzle which is arranged inside a desulfurizing tower, and solid particles in a dust-removing device is sent back into the desulfurizing tower by a material transmission device; a first desulfurization technique adopts the first desulfurization device and leads the desulfurization process to be carried out inthe desulfurizing tower; a second desulfurization device is provided with an atomizing nozzle which is arranged inside a flue gas discharge pipeline, and the solid particles are precipitated in the dust-removing device; and a second desulfurization technique adopts the second desulfurization device and leads the desulfurization process to be carried out in the flue gas discharge pipeline. The invention realizes the desulfurization efficiency of 85-90%, ensures the consumption quantity of sodium hydroxide to be less than 15%, and has low operating cost.

Description

technical field [0001] The invention relates to a double-basic flue gas desulfurization device and process, belonging to the technical field of flue gas desulfurization technology. Background technique [0002] Currently, SO 2 Emission reduction is an urgent task in my country's air pollution control work. SO in large thermal power plants 2 Emission reduction technologies are mainly imported technologies, more than 85% of which are limestone-gypsum wet methods. This method has high desulfurization efficiency and stable operation, but the construction cost is high and the operation power consumption is large, so it is not suitable for industrial boilers burning medium and low sulfur coal, whose evaporation capacity is below 670t / h. [0003] The existing double-alkali flue gas desulfurization technology has low investment, and the double-alkali method includes the sodium-calcium double-alkali method (NaOH-Ca(OH) 2 ), magnesium-calcium double-alkali method (MgO-Ca(OH) 2 ),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 高建民高继慧杜谦吴少华谢敏栾积毅秦裕琨
Owner HARBIN INST OF TECH