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Multi-stage dense-phase synergistic absorption system suitable for high-concentration pollutant high-fluctuation flue gas

An absorption system and absorption tower technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of poor deacidification effect, short contact time, and low utilization rate of removers, and achieve increased treatment. volume, the effect of increasing capacity

Pending Publication Date: 2022-07-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited height of the tower body, the lye entering the tower body will be discharged out of the tower body from the smoke outlet after a short contact with the flue gas. Reduce pollution to the atmosphere
[0003] The existing dry-type deacidification reaction tower also has uneven flue gas flow field in the tower, which is not conducive to the mixing of deacidification agent and flue gas, the residence time of deacidification agent is short, sedimentation occurs in the tower, and the utilization rate of removal agent is low And other issues

Method used

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  • Multi-stage dense-phase synergistic absorption system suitable for high-concentration pollutant high-fluctuation flue gas
  • Multi-stage dense-phase synergistic absorption system suitable for high-concentration pollutant high-fluctuation flue gas
  • Multi-stage dense-phase synergistic absorption system suitable for high-concentration pollutant high-fluctuation flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] like figure 1 As shown, in this embodiment, the multi-stage absorption tower system includes four absorption towers 4 , specifically a first-stage absorption tower 41 , a second-stage absorption tower 42 , a third-stage absorption tower 43 and a fourth-stage absorption tower 44 . Each stage of the absorption tower includes an air inlet and an air outlet, which are connected in series from the first-stage absorption tower to the fourth-stage absorption tower, that is, the air outlet of the first-stage absorption tower is connected to the air inlet of the second-stage absorption tower, and the second-stage The air outlet of the absorption tower is connected to the air inlet of the three-stage absorption tower.

[0075] The multistage absorption tower system includes a new ash bin 1 for storing the deacidification agent. Described deacidification agent comprises calcium carbonate, calcium oxide, calcium hydroxide, sodium carbonate, the mixture of two or more substances in...

Embodiment 2

[0085] The difference from Example 1 is that the setting of the stirring device is different. Each stage of the tower body is provided with a co-gravity flow area and a counter-gravity flow area, and the co-gravity flow area is equipped with a vertical stirring device. The stirring rate of the device is 0~910r / min, and the stirring radius is 0~4.5m. Fluctuation, frequency conversion dynamically adjusts the speed to match the change of flue gas; there is a horizontal stirring device in the counter-gravity flow area, the stirring speed of the device is 0 ~ 570r / min, the stirring radius is 0 ~ 3m, the frequency conversion dynamically adjusts the speed to match the change of material circulation .

[0086] The system of Embodiment 1 is adopted below (the number of absorption towers varies), and is described in conjunction with specific examples.

experiment example 1

[0087] Experimental example 1, using a 4-stage absorption tower, the acid gases HF, HCl, SO in the original flue gas2 As shown in the table, the water content of flue gas is 40%, 200 mesh calcium hydroxide is used as deacidification agent (moisture content 8%), the height of the tower is 12m, the length of the spoiler component is 5.6m, and the inclination angle is +65 °, the purification efficiency is above 95%.

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Abstract

The multi-stage multi-cycle absorption tower comprises more than two absorption towers, a bag-type dust collector, a humidifying device and a new ash bin, each absorption tower is provided with a gas inlet and a gas outlet, the gas outlet of the previous absorption tower is communicated with the gas inlet of the next absorption tower, and the absorption towers are sequentially communicated in series; the new ash bin is communicated with the first absorption tower, and a humidifying device is arranged between the new ash bin and the first absorption tower; the last absorption tower is communicated with an inlet of a bag-type dust collector, the bag-type dust collector is arranged above the absorption tower, and a dust hopper of the bag-type dust collector is communicated with the absorption tower through a humidifying device. The absorption tower is suitable for high-temperature, high-concentration, high-fluctuation and high-humidity acid-containing and dust-containing flue gas, particularly industrial furnace waste gas, hazardous waste treatment and the like.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a multi-stage absorption system, and more particularly, to a multi-stage multi-cycle absorption system with multi-point humidification and multi-point ash discharge. Background technique [0002] In recent years, the control of air pollution has always been a research hotspot. The flue gas produced by industrial kilns and hazardous waste incineration contains acid gases, dioxins, heavy metals and other harmful gases. If these harmful gases are not treated, It will cause serious pollution to the environment. Therefore, flue gas deacidification is very necessary. The traditional deacidification device generally includes a tower body arranged vertically, the bottom and top of the tower body are respectively provided with a smoke inlet and a smoke outlet, and the side wall of the tower body above the smoke inlet is provided with an lye nozzle. When this deacidification d...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/40B01D53/75B01D53/18B01D53/14B01D46/02B01D50/60B01D53/04
CPCB01D53/80B01D53/40B01D53/75B01D53/18B01D53/1406B01D46/02B01D53/04B01D2257/706B01D2257/2064B01D2258/0283B01D2258/0291B01D2251/404B01D2251/602B01D2253/102
Inventor 苏伟邢奕梁宝瑞宋存义张洪硕
Owner UNIV OF SCI & TECH BEIJING
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