Condensation wet type electric compound flue gas purification process
A flue gas purification process and flue gas technology, applied in the direction of combined devices, chemical instruments and methods, and separation of dispersed particles, can solve problems such as large water consumption, easy blockage, and large white smoke, and achieve the solution of large white smoke and promote capture. Integrate and achieve the effect of ultra-low emission
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Embodiment 1
[0034] The coagulation wet electricity composite flue gas purification process provided by the present invention comprises the following steps,
[0035] Step a: passing the flue gas to be treated into a wet desulfurization device for desulfurization, demisting and preliminary dust removal;
[0036] Step b: Pass the flue gas obtained in step a to the wet electrostatic precipitator for deep purification, remove particulate matter and SO in the flue gas 3 aerosol;
[0037] Step c: the flue gas obtained in step b is condensed and dehydrated through a heat exchange condenser, and SO in the flue gas is removed 3 , soluble salts and mercury;
[0038] Step d: the flue gas obtained after step c is discharged through a chimney.
[0039] Such as figure 1 As shown, the wet desulfurization device 1 communicates with the wet electrostatic precipitator 3 through the inlet flue 2, the inlet flue 2 is located above the wet desulfurization device 1, and its entrance is connected to the top ...
Embodiment 2
[0049] On the basis of Example 1, the process was further improved. In order to save water resources and realize water recycling and reuse, the condensed water obtained in step c was sent to a wet desulfurization device as flushing water for recycling and reuse. For water-scarce areas, the environmental and economic benefits are more obvious.
[0050] In order to achieve water recycling and reuse, such as figure 1 As shown, a liquid collecting tank 8 is provided at the bottom of the wet electrostatic precipitator, and the liquid collecting tank 8 is a cone bucket with an opening width of 1.5-3.0 m and a height of 1.0-1.5 m. In particular, the liquid collection tank 8 is connected to the water treatment tank 10 through pipelines, and the water treatment tank 10 is connected to the upper side of the wet desulfurization device 1 through pipelines. Washing pumps 9 are respectively installed on the pipelines between the water treatment tank 10 and the wet desulfurization device 1 ...
Embodiment 3
[0052] On the basis of embodiment 1 or 2, such as figure 1 As shown, at the bottom of the wet electrostatic precipitator 3, an air distribution device 4 with the functions of diversion, flow equalization and pre-dust removal is provided. Further, the air distribution device 4 includes a deflector plate 4.1 matching the inner diameter of the wet electrostatic precipitator 3, such as image 3 As shown, the deflector plate 4.1 is provided with a plurality of regular hexagonal air flow holes 4.2, and the air flow holes 4.2 are arranged in a honeycomb shape with a side length of 0.10-0.18m and a depth of 0.20-0.35m. The flue gas circulation area increases, thereby reducing the flow velocity and prolonging the residence time, which is conducive to improving the dust removal effect. The flue gas entering the wet electrostatic precipitator 3 from the inlet flue 2 first passes through the air distribution device 4, and the air distribution device 4 plays the role of diversion, flow eq...
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Abstract
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