CN111111328B - A spiral dust removal and demister, a demister device and an absorption tower - Google Patents
A spiral dust removal and demister, a demister device and an absorption tower Download PDFInfo
- Publication number
- CN111111328B CN111111328B CN202010097336.XA CN202010097336A CN111111328B CN 111111328 B CN111111328 B CN 111111328B CN 202010097336 A CN202010097336 A CN 202010097336A CN 111111328 B CN111111328 B CN 111111328B
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- China
- Prior art keywords
- spiral
- demister
- dust
- flue gas
- hollow cavity
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- 239000000428 dust Substances 0.000 title claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003595 mist Substances 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000012719 wet electrostatic precipitator Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a spiral dust removal demister, a demisting device and an absorption tower, which comprise the following components: the cylinder is internally provided with a hollow cavity for communicating two ends of the flue gas. The inner spiral part is detachably connected in the hollow cavity. The outer spiral part is detachably connected in 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 as a cylinder body with two ends communicated, the inner wall surface of the cylinder body is detachably connected with the inner thread part, and the outer thread part is arranged in the inner thread part. After the flue gas enters the hollow cavity of the cylinder, the flue gas enters the external thread part and forms high-speed centrifugal force, so that fog drops and dust contained in the flue gas expand outwards, the flue gas is separated from the threads of the internal thread part, the fog drops and the dust 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 secondarily entrained, and the effect of improving the dust removal and defogging performance is achieved.
Description
Technical Field
The invention belongs to the technical field of flue gas absorption towers, and particularly relates to a spiral dust removal demister, a demisting device and an absorption tower.
Background
Demisters are important components of desulfurization absorber towers. The demister is arranged above the absorption tower and mainly used for separating entrained liquid drops and slurry in the flue gas, so that the mist drops are prevented from entering a chimney and being discharged into the atmosphere. The mist droplets carried in the flue gas pass through the demister at a certain speed, and due to the inertia effect, the mist droplets strike the demister blades and are trapped, and when more and more trapped mist droplets reach a certain weight, the trapped mist droplets fall down and enter the desulfurizing tower again.
The traditional baffle plate demister comprises a flat plate type demister and a ridge type demister, the particle size of the removed fog drops is more than 15 mu m, the baffle plate demister is easy to scale and block, in actual operation, in order to ensure normal operation of equipment, the baffle plate demister needs to be washed regularly, and the waste water amount of a desulfurization system is large. Meanwhile, the traditional baffle plate demister has limited dedusting effect, and if the rear end of desulfurization is not provided with a wet electrostatic precipitator and other dedusting devices, the concentration of dust at the outlet of the absorption tower is difficult to ensure to be lower than 20mg/Nm3, so that 5mg/Nm3 of ultra-low emission is realized.
Therefore, the dedusting and demisting performance of the demister is improved, and the demister has important environmental protection and social significance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a spiral dedusting demister, a demisting device and an absorption tower so as to improve dedusting and demisting performances.
In order to solve the problems, the technical scheme of the invention is as follows:
the invention relates to a spiral dust and mist remover, which comprises:
the cylinder body is internally provided with a hollow cavity for communicating two ends of the flue gas;
the inner spiral part is detachably connected in the hollow cavity;
the outer spiral part is detachably connected in the inner spiral part;
the helical path of the inner helical portion is different from the helical path of the outer helical portion.
The inner spiral part comprises a plurality of spiral strips, and the spiral strips are respectively connected in the hollow cavity at intervals and in an adhering manner and are matched with the inner wall surface of the hollow cavity to form a spiral water collecting groove.
The outer spiral part comprises a spiral blade and a rod body, the spiral blade is annularly arranged on the rod body, and the outer side surface of the spiral blade is in wall-attached connection with a plurality of spiral strips of the spiral water collecting tank.
According to the spiral dust-removing demister, the rod body is provided with the through hole communicated with the external cleaning device.
In the spiral dedusting demister disclosed by the invention, the spiral water collecting grooves and the spiral blades are opposite in spiral direction.
The invention relates to a spiral dust-removing demister, the cylinder body, the inner spiral part and the outer spiral part are made of polypropylene plastics or fiber reinforced plastics.
The demisting device comprises a filter plate and the spiral dedusting demister, wherein a plurality of accommodating through holes for accommodating the spiral dedusting demister are formed in the filter plate, and the spiral dedusting demister is arranged in the accommodating through holes.
The absorption tower is provided with the demisting device.
By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:
1. according to the demister, the demister is arranged as the cylinder body with two communicated ends, the inner threaded portion is detachably connected to the inner wall surface of the cylinder body, and the outer threaded portion is arranged in the inner threaded portion. Meanwhile, the spiral paths of the internal thread part and the external thread part are different. After the flue gas enters the hollow cavity of the cylinder, the flue gas enters the external thread part and forms high-speed centrifugal force, so that fog drops and dust contained in the flue gas expand outwards, the flue gas is separated from threads of the internal thread part, the fog drops and the dust are blocked by the threads of the internal thread part and flow down along the threads through different thread paths, the dust and the fog drops are prevented from being secondarily entrained, and finally the effect of further improving dust removal and defogging is achieved.
2. According to the embodiment of the invention, the rod body is arranged as the hollow rod body and is used for passing through flushing water, so that the flushing efficiency of the device is improved, and on the other hand, the internal thread part and the external thread part can be freely pulled out of the spiral cylinder, so that the device is convenient to overhaul and maintain.
Drawings
FIG. 1 is a schematic view of a spiral dust and mist eliminator of the present invention;
FIG. 2 is a schematic view of an outer spiral of the present invention;
FIG. 3 is a mounting elevation view of the absorber tower of the present invention;
FIG. 4 is a plan view showing the installation of the absorber tower of the present invention;
Fig. 5 is another installation floor plan view of the absorption tower of the present invention.
The reference numerals indicate 1 an absorption tower, 21 a primary ridge type demister, 22a secondary ridge type demister, 3 a spiral dedusting demister, 31 a cylinder, 32 an inner spiral part, 33 an outer spiral part, 331 spiral blades, 332 a rod body and 4 a supporting beam.
Detailed Description
The spiral dedusting demister, the demisting device and the absorption tower provided by the invention are further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims.
Example 1
Referring to fig. 1 and 2, in one embodiment, a spiral dust and mist eliminator 3 includes a cylinder 31, and a hollow cavity communicating two ends for passing flue gas is provided in the cylinder 31. The inner screw 32 is removably attached within the hollow cavity. The outer screw portion 33 is detachably connected to the inner screw portion 32. Meanwhile, the spiral path of the inner spiral part 32 is different from that of the outer spiral part 33.
The spiral dedusting demister 3 is provided with a cylinder 31 with two communicated ends, an inner thread part is detachably connected on the inner wall surface of the cylinder 31, and an outer thread part is arranged in the inner thread part. Meanwhile, the spiral paths of the internal thread part and the external thread part are different. After the flue gas enters the hollow cavity of the cylinder 31, the flue gas enters the external thread part and forms high-speed centrifugal force, so that fog drops and dust contained in the flue gas expand outwards, the flue gas is separated from the threads of the internal thread part, the fog drops and dust are blocked by the threads of the internal thread part and flow down along the threads through the different thread paths, the dust and the fog drops are prevented from being secondarily entrained, and finally the effect of further improving dust removal and defogging is achieved.
In this embodiment, the inner spiral portion 32 includes a plurality of spiral strips, and the plurality of spiral strips are respectively spaced and connected in the hollow cavity in an adhering manner, and cooperate with the inner wall surface of the hollow cavity to form a spiral water collecting tank. The wall-attached connection means that the diameter of the hollow cavity is slightly smaller than the outer diameter of the spiral strip on the horizontal plane, and the spiral strip is directly contacted with the inner wall surface of the cylinder 31 and fixed by friction force after being arranged in the hollow cavity. When repair or maintenance is required, the spiral strip can be pulled out directly from the cylinder 31. In other embodiments, the inner wall surface of the cylinder 31 may be directly provided with a groove adapted to the spiral strip, and the spiral strip is directly plugged into the cylinder 31 and then is clamped into the adapted groove, or the spiral strip and the cylinder 31 may be detachably connected in other manners, which is not limited herein.
In this embodiment, the outer spiral part 33 includes a spiral blade 331 and a rod 332, the spiral blade 331 is annularly disposed on the rod 332, and the outer side surface of the spiral blade 331 is attached to a plurality of spiral strips of the spiral water collecting tank. I.e. the screw blade 331 is integrally provided with the rod body 332, and the wall-attached connection of the screw blade 331 is such that the inner diameter of the screw bar is slightly smaller than the diameter of the screw blade 331. Thus, when the spiral vane 331 is inserted into the cylinder 31 having the spiral strip mounted thereon, it is possible to contact with the inner surface of the inner diameter of the spiral strip and fix the spiral strip by friction force of the contact surface. When repair or maintenance is required, the spiral vane 331 may be pulled directly from the spiral strip. In other embodiments, the inner surface of the spiral strip may be directly provided with a groove corresponding to the spiral blade 331, and the spiral blade 331 is directly plugged into the cylinder 31 and then is clamped into the groove corresponding to the spiral strip, or the spiral blade 331 and the spiral strip may be detachably connected in other manners, which is not limited herein. Of course, the lower end spiral radius and the upper end spiral radius of the spiral blade are the same, and of course, the upper end spiral radius may be set smaller than the lower end spiral radius, and the specific setting of the spiral radius is not limited here.
Further, the rod body 332 is provided with a through hole communicating with an external cleaning device. That is, the rod body 332 is of a hollow structure, and the inside of the rod body is connected with a flushing device for cleaning gypsum slurry attached to equipment, so that the flushing efficiency of the device and the operation performance of the absorption tower 1 are further improved.
Preferably, the spiral water collection grooves and the spiral blades 331 are in opposite spiral directions. If the spiral water collecting tank is in a reverse rotation design, the spiral blade 331 is in a forward rotation design, or the spiral water collecting tank can be in a forward rotation design, and the spiral blade 331 is in a reverse rotation design, which is not limited herein. When the spiral directions are opposite, the flue gas enters the spiral blade 331 and is centrifuged at a high speed, and mist drops and dust separated outwards are blocked by the spiral strips of the reverse spiral water collecting grooves and flow out along the spiral strips.
In the present embodiment, the cylinder 31, the inner screw 32 and the outer screw 33 are a cylinder 31, an inner screw 32 and an outer screw 33 made of polypropylene plastic or fiber reinforced plastic.
The flow of flue gas in the demister is further elucidated below.
The smoke enters the spiral blade 331 to form a high-speed centrifugal force, so that fog drops and dust contained in the smoke expand outwards and are separated from the smoke to be thrown into the spiral water collecting groove, the spiral direction of the spiral water collecting groove is opposite to that of the spiral blade 331, the phenomenon of secondary entrainment caused by contact between the dust and the fog drops in the downward flowing process and the smoke can be avoided, and the dust and the fog drops smoothly flow downwards along the wall surface of the spiral water collecting groove to return to the slurry pool, so that the effects of dust removal and defogging are achieved. The spiral dedusting demister 3 can effectively remove fog drops smaller than 15 mu m, reduce the fog drop concentration at the outlet to 20mg/Nm 3, and simultaneously effectively remove dust, and reduce the dust concentration at the outlet to 5mg/Nm 3.
Example two
Referring to fig. 4, the demisting device of the present embodiment includes a filter plate and the spiral dedusting demister 3 in the first embodiment, where a plurality of accommodating through holes for accommodating the spiral dedusting demister 3 are provided on the filter plate, and the spiral dedusting demister 3 is disposed in the accommodating through holes. The shape of the filter plate can be adapted to the cross section of the absorption tower so as to be arranged in the absorption tower and realize sealing, and the flue gas is discharged after passing through the spiral dust removal demister 3. The number of the containing through holes on the filter plate can also be set according to the required ventilation and the cross-sectional area of the absorption tower.
Example III
Referring to fig. 3, an absorption tower 1 of the present embodiment is provided with the demister apparatus of the second embodiment described above.
When the required dedusting and demisting requirements are high, a primary roof-ridge demister 21, a secondary roof-ridge demister 22 and at least one demisting device can be respectively arranged in the flue according to the flow direction of the flue gas. The demister is installed by means of a support beam 4 arranged in the absorption tower 1.
The primary ridge type demister 21 and the secondary ridge type demister 22 are used for pre-demisting, and the demisting device is used for fine demisting, so that the dedusting and demisting performance of the absorption tower 1 is further improved, the dust is effectively removed on the premise that the concentration of fog drops at the outlet of the absorption tower 1 is guaranteed, the ultra-low emission requirement is met, and the device has important environmental protection and social significance.
Of course, the absorption tower 1 may be provided with a primary ridge type demister 21 and a secondary ridge type demister 22, and only a demister is used for dedusting and demisting, as shown in fig. 5, in this embodiment, a two-layer spiral demister is provided, and of course, a multi-layer demister may be provided according to the specific situation, which is not particularly limited herein.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.
Claims (5)
1. A spiral dust and mist eliminator, comprising:
the cylinder body is internally provided with a hollow cavity for communicating two ends of the flue gas;
the inner spiral part is detachably connected in the hollow cavity;
the outer spiral part is detachably connected in the inner spiral part;
the spiral path of the inner spiral part is different from the spiral path of the outer spiral part;
the inner spiral part comprises a plurality of spiral strips, wherein the spiral strips are respectively connected in the hollow cavity at intervals and in an adhering way and are matched with the inner wall surface of the hollow cavity to form a spiral water collecting groove;
The outer spiral part comprises a spiral blade and a rod body, wherein the spiral blade is annularly arranged on the rod body, and the outer side surface of the spiral blade is adhered to and connected with a plurality of spiral strips of the spiral water collecting tank;
the spiral water collecting grooves and the spiral blades are opposite in spiral direction.
2. The spiral dust and mist eliminator as set forth in claim 1, wherein the rod body is provided with a through hole communicating with an external cleaning device.
3. The spiral dust and mist eliminator of claim 1 wherein the cylinder, the inner spiral portion and the outer spiral portion are of polypropylene plastic or fiber reinforced plastic.
4. A demisting device, which is characterized by comprising a filter plate and a plurality of spiral dedusting demisters as claimed in any one of claims 1-3, wherein the filter plate is provided with a plurality of accommodating through holes for accommodating the spiral dedusting demisters, and the spiral dedusting demisters are arranged in the accommodating through holes.
5. An absorption tower, wherein a demister apparatus according to claim 4 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097336.XA CN111111328B (en) | 2020-02-17 | 2020-02-17 | A spiral dust removal and demister, a demister device and an absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097336.XA CN111111328B (en) | 2020-02-17 | 2020-02-17 | A spiral dust removal and demister, a demister device and an absorption tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111111328A CN111111328A (en) | 2020-05-08 |
| CN111111328B true CN111111328B (en) | 2025-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010097336.XA Active CN111111328B (en) | 2020-02-17 | 2020-02-17 | A spiral dust removal and demister, a demister device and an absorption tower |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111744358B (en) * | 2020-06-23 | 2022-09-09 | 苍龙集团有限公司 | Intelligent integrative vortex sprays deodorization equipment |
| CN111729508B (en) * | 2020-06-23 | 2022-09-09 | 苍龙集团有限公司 | Mixed induced flow spraying deodorization device |
| CN112169449A (en) * | 2020-09-30 | 2021-01-05 | 江阴市启吉环保设备有限公司 | A high-efficiency double-coil bundle dust and mist eliminator |
| CN112933841B (en) * | 2021-02-07 | 2022-08-12 | 华南理工大学 | A kind of anti-secondary carrying device and method for removing mist and dust with spiral groove |
| CN114349096B (en) * | 2021-12-27 | 2025-07-01 | 哈尔滨工大金涛科技股份有限公司 | Multi-layer demisting flash evaporator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101099920A (en) * | 2006-07-06 | 2008-01-09 | 王国华 | Integration dust-removing and desulfurizing device |
| CN205760167U (en) * | 2016-07-05 | 2016-12-07 | 中节能六合天融环保科技有限公司 | A kind of high-effective dust-removing demister in desulfuration absorbing tower |
| CN108057281A (en) * | 2017-12-20 | 2018-05-22 | 佛山市创世汇知识产权服务有限公司 | A kind of Archimedian screw filter device |
| CN211987524U (en) * | 2020-02-17 | 2020-11-24 | 斯蒙赫尔(上海)环保科技有限公司 | Spiral dust removal defroster, defogging device and absorption tower |
-
2020
- 2020-02-17 CN CN202010097336.XA patent/CN111111328B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101099920A (en) * | 2006-07-06 | 2008-01-09 | 王国华 | Integration dust-removing and desulfurizing device |
| CN205760167U (en) * | 2016-07-05 | 2016-12-07 | 中节能六合天融环保科技有限公司 | A kind of high-effective dust-removing demister in desulfuration absorbing tower |
| CN108057281A (en) * | 2017-12-20 | 2018-05-22 | 佛山市创世汇知识产权服务有限公司 | A kind of Archimedian screw filter device |
| CN211987524U (en) * | 2020-02-17 | 2020-11-24 | 斯蒙赫尔(上海)环保科技有限公司 | Spiral dust removal defroster, defogging device and absorption tower |
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| CN111111328A (en) | 2020-05-08 |
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