Spiral dedusting demister, demisting device and absorption tower

A spiral dust removal and mist eliminator technology, which is applied in the field of spiral dust removal mist eliminators, mist removal devices and absorption towers, can solve the problems of limited dust removal effect, large amount of waste water in the desulfurization system, difficulty in dust concentration at the outlet of the absorption tower, etc., to achieve convenient Overhaul and maintenance, improve the effect of dust removal and mist removal, and improve flushing efficiency

Pending Publication Date: 2020-05-08
斯蒙赫尔(上海)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional baffle demisters include flat plate demisters and roof ridge demisters, and the particle size of the removed mist is above 15 μm; baffle demisters are prone to fouling and clogging. In actual operation, in order to ensure that the equipment Normal operation requires regular flushing, resulting in a large amount of wastewater in the desulfurization system
At the same time, the traditional baffle plate demister has limited dust removal effect. If there is no dust removal device such as wet electrostatic precipitator at the back end of desulfurization, it is difficult to ensure that the dust concentration at the outlet of the absorption tower is lower than 20mg / Nm3, let alone achieve a super high level of 5mg / Nm3. low emission

Method used

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  • Spiral dedusting demister, demisting device and absorption tower
  • Spiral dedusting demister, demisting device and absorption tower
  • Spiral dedusting demister, demisting device and absorption tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 and figure 2 , In one embodiment, a spiral dust and mist eliminator 3 includes: a cylinder body 31, and a hollow cavity is provided in the cylinder body 31 for communicating with both ends for the flue gas to pass through. The inner spiral part 32 is detachably connected in the hollow cavity. The outer spiral portion 33 is detachably connected to the inner spiral portion 32 . Meanwhile, the helical path of the inner helical portion 32 is different from the helical path of the outer helical portion 33 .

[0031] By setting the spiral dust and mist remover 3 as a cylindrical body 31 connected at both ends, the inner threaded part is detachably connected to the inner wall surface of the cylindrical body 31, and an outer threaded part is arranged in the inner threaded part. At the same time, the helical paths of the internally threaded portion and the externally threaded portion are different. When the flue gas enters the hollow cavity of the cylinder body...

Embodiment 2

[0040] see Figure 4 , the demisting device of the present embodiment comprises a filter plate and the spiral dust and mist eliminator 3 in the above-mentioned embodiment one; the filter plate is provided with a plurality of accommodating through holes for accommodating the spiral dust and mist eliminator 3, and the spiral dust and mist eliminator 3 The demister 3 is arranged in the receiving through hole. The shape of the filter plate can be adapted to the cross-section of the absorption tower, so that it can be installed in the absorption tower and sealed, so that the flue gas can be discharged after passing through the spiral dust and mist eliminator 3. The number of accommodating through holes on the filter plate can also be set according to the required air flow and the cross-sectional area of ​​the absorption tower.

Embodiment 3

[0042] see image 3, an absorption tower 1 of this embodiment is provided with the demisting device in the second embodiment above.

[0043] When the required dust and fog removal requirements are relatively high, a primary roof type mist eliminator 21 and a secondary roof type mist eliminator 22 and at least one mist removal device can also be installed in the flue according to the flow direction of the flue gas. The demisting device is installed through the support beam 4 arranged in the absorption tower 1 .

[0044] Pre-defogging is carried out by the first-level ridge-type demister 21 and the second-level ridge-type demister 22, and then fine demisting is carried out by the demister device, so as to further improve the dust and mist removal performance of the absorption tower 1, and ensure that the absorption tower 1 Under the premise of the outlet droplet concentration, the effective removal of dust and ultra-low emission requirements are achieved, which has important en...

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PUM

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Abstract

The invention discloses a spiral dedusting demister, a demisting device and an absorption tower. The spiral dedusting demister comprises a barrel, and a hollow cavity which is used for allowing flue gas to pass through and has two communicated ends is formed in the barrel. An inner spiral part is detachably connected into the hollow cavity. An outer spiral part is detachably connected into the inner spiral part. Meanwhile, the spiral path of the inner spiral part is different from that of the outer spiral part. The spiral dedusting demister is arranged to be a barrel with the two ends communicated, the inner wall face of the barrel is detachably connected with an internal thread part, and an external thread part is arranged in the internal thread part. Smoke enters the hollow cavity of thebarrel; the smoke enters the external thread part and forms high-speed centrifugal force, so that fog drops and dust contained in the smoke expand outwards, are separated from the smoke, enter threads of the internal thread part, are blocked by the threads of the internal thread part and flow down along the threads, the dust and the fog drops are prevented from being carried for the second time,and the effect of improving the dedusting and demisting performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of flue gas absorption towers, and in particular relates to a spiral dust and mist eliminator, a mist removal device and an absorption tower. Background technique [0002] The demister is an important part of the desulfurization absorption tower. The demister is installed above the absorption tower, and its main function is to separate the entrained liquid droplets and slurry in the flue gas, so as to prevent the mist droplets from entering the chimney and being discharged into the atmosphere. Its working mechanism is: the mist carried by the flue gas passes through the demister at a certain speed. Due to the inertia, the mist hits the blades of the demister and is trapped. When more and more mist is collected , falls down after reaching a certain weight, and enters the desulfurization tower again. [0003] Traditional baffle demisters include flat plate demisters and roof ridge demisters, and the particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D45/16
CPCB01D45/16
Inventor 朱晓欣吴永杰戴永阳
Owner 斯蒙赫尔(上海)环保科技有限公司
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