An integrated device for flue gas desulfurization, efficiency improvement, dust removal and dehydration

A technology of flue gas and dust collector, which is applied in the field of treatment devices for saturated wet flue gas after wet desulfurization in thermal power plants, which can solve the problems of non-standard emission and achieve the effect of increasing desulfurization efficiency

Active Publication Date: 2018-04-13
NANTONG YATAI ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In 2014, the National Development and Reform Commission proposed an action plan for the upgrading and transformation of coal power energy conservation and emission reduction, and proposed that the concentration of air pollutants emitted by coal-fired power generation units should basically reach the emission limits of gas turbine units (that is, under the condition of a reference oxygen content of 6%, the emission of soot, sulfur dioxide, nitrogen oxides, etc. The emission concentration of pollutants is not higher than 10, 35, and 50 mg / m3 respectively), and the existing desulfurization equipment, if not modified, cannot meet the emission standards

Method used

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  • An integrated device for flue gas desulfurization, efficiency improvement, dust removal and dehydration
  • An integrated device for flue gas desulfurization, efficiency improvement, dust removal and dehydration
  • An integrated device for flue gas desulfurization, efficiency improvement, dust removal and dehydration

Examples

Experimental program
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Effect test

Embodiment 1

[0019] like figure 1 As shown, the device is installed on the top of the desulfurization tower. It is a shell-and-tube heat exchanger, and the two ends are sealed with tube sheets. The cold air inlet 2 and the cold air outlet 3 are both ends of the flue gas desulfurization efficiency improvement, dust removal, and dehydration integrated equipment. welding.

[0020] like figure 2 As shown, a certain number of dust removal heat exchange tubes 4 are distributed in the middle of the flue gas desulfurization efficiency improvement, dust removal, and dehydration integrated equipment, and the outer shell is the desulfurization tower cylinder.

[0021] like Figure 4 It is a cross-sectional view of a dust removal heat exchange tube 4. The desulfurized flue gas enters from the lower part of the flue gas desulfurization efficiency improvement, dust removal, and dehydration integrated equipment, and enters the dust removal heat exchange tube 4 for treatment. The treated gas is process...

Embodiment 2

[0025] like image 3 The integrated equipment for flue gas desulfurization, efficiency improvement, dust removal and dehydration shown is based on Example 1

[0026] A cover plate 8 is installed on the top or / and bottom of the dust removal heat exchange tube 4 through a hinge structure, and the cover plate 8 is made of a material with a lower density. The cover plate 8 is in a normally open state under the action of smoke due to its light weight during normal operation. When the flue gas flow rate is lower than the preset design flow rate, the partial cover plate 8 is selected to be closed according to the percentage of the actual flow rate and the design flow rate. Several cover plates 8 can be formed into a group for collective control, and the cover plates 8 are closed by feeding compressed air into the actuator 9 . In this way, it can be ensured that the flow rate of the flue gas in the dust removal heat exchange tube 4 will not be too low, thereby ensuring the efficienc...

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Abstract

The present invention relates to a treatment device for saturated wet flue gas after wet desulfurization in a thermal power plant; in particular, it relates to an integrated device for flue gas desulfurization, dust removal, and dehydration, which includes at least one dust removal heat exchange tube, and the gas is exchanged by the dust removal heat exchange tube. The lower end of the tube enters and the upper end exits. It is characterized in that: a swirl plate is set at the entrance of the dust removal heat exchange tube, a venturi tube dust collector is set at the upper end of the swirl plate, and a swirl plate is set at the outlet of the dust removal heat exchange tube. The flow tube is equipped with a combination of multi-stage cyclone device + Venturi tube dust collector in the tube. The invention has the advantages that the moisture in the flue gas can be recovered and the sulfur emission of the flue gas can be reduced.

Description

technical field [0001] The invention belongs to a flue gas treatment system for removing thermal power plants, in particular to a treatment device for saturated wet flue gas after wet desulfurization in thermal power plants. Background technique [0002] In order to meet the requirements of the newly promulgated "Emission Standards of Air Pollutants for Coal-fired Power Plants" (GB 13223-2011), almost all power plant boilers need to be equipped with desulfurization devices. Most of the desulfurization devices in my country use wet desulfurization. This method desulfurization reaction The speed is fast, the efficiency is high, and the utilization rate of desulfurization additives is high, and the desulfurization rate can reach 90%, so that the emission of sulfur dioxide can meet the relevant requirements. But at the same time, the flue gas will take away a lot of water after passing through the desulfurization system. The annual drainage of a 600MW unit is about 1.5 million to...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01D53/78B01D53/50B01D50/00
CPCB01D53/50B01D53/78B01D2247/10B01D2258/0283B01D2259/124B01D50/40
Inventor王德荣聂金龙
OwnerNANTONG YATAI ENG TECH