Method for cooperatively controlling multiple pollutants of flue gas by using charge adsorbent strengthened electric bag device
A collaborative control and adsorbent technology, which is applied in the direction of chemical instruments and methods, combined devices, separation methods, etc., can solve the problem of low utilization rate of mercury removal and fine particle capture, increase in the structure size of the dust removal device, and difficulty in evenly distributing the adsorbent and other problems, to achieve the effect of removing heavy metals, increasing the structural size, and low operating costs
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Embodiment 1
[0039] Such as figure 1 As shown, the prepared adsorbent is first placed in the adsorbent container 1, the adsorbent is sent into the spray gun 3 by compressed air 2, the adsorbent is charged by the high voltage power supply 4, and then the positively charged adsorbent is charged by the spray gun 3 Adsorbent insulating spray pipe 5 sprays into the electro-bag junction area 7 between the electro-area 6 (electrostatic precipitator area) and the bag area 8 (bag-type precipitator area). The positively charged adsorbent and the negatively charged dust, heavy metals and condensable substances in the flue gas pass through the electric zone to coagulate to form large particle size particles. Large particle size particles are captured by the filter bag when the flue gas passes through the bag area 8 . The clean flue gas passes through the bag area and is discharged from the outlet, while the captured large-size particles fall off from the filter bag, are treated by the adsorbent recov...
Embodiment 2
[0044] The device and method are the same as those in Example 1, except that magnesium oxide powder with a particle size of 40-60 μm is added in a proportion of 30% while spraying on the iron-titanium adsorbent. The results show that after the adsorbent is mixed with magnesium oxide, the concentration of soot in the outlet flue gas can be reduced to 10mg / m 3 around, the removal rate of mercury remains basically the same, but the SO 3 The removal efficiency can be increased to about 92%. It can be seen that the mixed use of adsorbent and magnesium oxide can significantly improve the removal efficiency of various pollutants.
Embodiment 3
[0046] The device and method are the same as examples 1 and 2, and the experiment is carried out mainly on the recovery and separation of the adsorbent. A standard cyclone separator with a diameter of 250 mm is used to process the mixture of adsorbent and fine particles collected in the bag area. According to the result analysis, after the adsorbent is separated by two high-speed cyclones, the fine particles attached to the surface can basically be stripped off and collected separately from the adsorbent through inertial separation. The sorbent can be reused.
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