Dual-alkali flue gas desulfurization device and desulfurization method

A desulfurization equipment and dual-alkali process technology, applied in the field of atmospheric environmental protection, can solve the problems of unsuccessful sodium sulfite regeneration, increased sodium hydroxide input, unsustainable desulfurization efficiency, etc., to eliminate scaling blockage in the tower, avoid huge waste, Small footprint effect

Inactive Publication Date: 2010-11-10
COAL IND JINAN DESIGN & RES
View PDF5 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, through the follow-up investigation of the dual-alkali desulfurization projects in recent years, it is found that after long-term operation, the dual-alkali desulfurization process generally has the shortcomings of fouling in the absorption tower and uns

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dual-alkali flue gas desulfurization device and desulfurization method
  • Dual-alkali flue gas desulfurization device and desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment includes an absorption tower 1, a liquid caustic soda storage tank 10, a quicklime powder bin 11, and the quicklime powder bin 11 is sequentially connected with a lime slurry tank 12, an oxidation regeneration tank 2, a primary sedimentation tank 3, a secondary sedimentation tank 4 and a circulation tank 5. The bottom of the absorption tower 1 is provided with pipelines leading to the oxidation regeneration tank 2, the secondary sedimentation tank 4 and the circulation tank 5 respectively, and the circulation tank 5 is provided with an absorption tower circulation pump 6 leading to the upper part of the absorption tower 1, and the primary sediment The bottom outlets of pool 3 and secondary sedimentation tank 4 lead to horizontal vacuum belt filter 8 through gypsum slag pump 7; oxidation regeneration tank 2 is connected with oxidation fan 9; There is a mixing tank.

[0017] D...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a dual-alkali flue gas desulfurization device and a desulfurization method. The dual-alkali flue gas desulfurization device comprises an absorption tower, a liquid alkali storage tank and a quick lime powder cabin, wherein the quick lime powder cabin is communicated with a lime slurry tank, an oxidation recovery tank, a primary sedimentation tank, a secondary sedimentation tank and a circulating tank in turn; the bottom of the absorption tower is provided with pipes leading to the oxidation recovery tank, the secondary sedimentation tank and the circulating tank; and an absorption tower circulating pump leading to the upper part of the absorption tower is arranged in the circulating tank. The desulfurization process comprises the following steps of: pumping NaOH solution into the absorption tower by using a pump to fully contact a flue gas so as to ensure that sulfur dioxide reacts with NaOH to produce NaHSO3 solution; discharging the NaHSO3 solution into the oxidation recovery tank from the absorption tower; simultaneously, adding Ca(OH)2 slurry into the oxidation recovery tank to produce the calcium sulfite precipitate; and producing a CaSO4 sediment through an oxidation effect of the air provided by an oxidation blower. The device and the method have the advantages of completely eliminating the possibility of fouling and blocking in the tower, having high desulfurization efficiency and low operating cost and preventing huge waste of a desulfurizing agent.

Description

(1) Technical field [0001] The invention relates to a double-alkali flue gas desulfurization device and a desulfurization method, belonging to the technical field of atmospheric environment protection. (2) Background technology [0002] At present, the large-scale boiler equipment desulfurization project of my country's coal-fired power plants has been basically completed, and most professional desulfurization companies turn their attention to flue gas desulfurization of small and medium-sized units. The desulfurization process of small and medium-sized units is also developing continuously. The dual-alkali desulfurization process occupies a large proportion in the market due to its advantages of high desulfurization efficiency and low operating cost. [0003] However, through the follow-up investigation of the dual-alkali desulfurization projects in recent years, it is found that after long-term operation, the dual-alkali desulfurization process generally has the shortcomin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D53/78B01D53/50C04B11/26
Inventor 陈公卫杨恒凯陆阳刘军马继德张新
Owner COAL IND JINAN DESIGN & RES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap