CN111111328A - Spiral dust removal defroster, defogging device and absorption tower - Google Patents
Spiral dust removal defroster, defogging device and absorption tower Download PDFInfo
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- CN111111328A CN111111328A CN202010097336.XA CN202010097336A CN111111328A CN 111111328 A CN111111328 A CN 111111328A CN 202010097336 A CN202010097336 A CN 202010097336A CN 111111328 A CN111111328 A CN 111111328A
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- spiral
- dust
- flue gas
- hollow cavity
- barrel
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- 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
Abstract
The invention discloses a spiral dust and mist removing device, a mist removing device and an absorption tower, which comprise: the flue gas purification device comprises a barrel, wherein a hollow cavity which is used for enabling flue gas to pass through and is communicated with two ends is arranged in the barrel. 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 portion is different from the spiral path of the outer spiral portion. The spiral dust removal demister is arranged into a cylinder body with two communicated ends, the inner wall surface of the cylinder body is detachably connected with the inner threaded part, and the outer threaded part is arranged in the inner threaded part. After the flue gas enters the hollow cavity of the barrel body, 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 are expanded outwards and separated from the flue gas to enter 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, the dust and the fog drops are prevented from being secondarily entrained, and the effect of improving the dedusting and demisting performances is achieved.
Description
Technical Field
The invention belongs to the technical field of flue gas absorption towers, and particularly relates to a spiral dust and mist removing device, a mist removing device and an absorption tower.
Background
The demister is an important part of the desulfurization absorption tower. The defroster is installed in the absorption tower top, and the main effect is that liquid drop and the thick liquid separation of smuggleing secretly in the flue gas avoid the fog drop to get into the chimney and discharge in the atmosphere. The working mechanism is as follows: the fog drops that carry in the flue gas pass through the defroster with certain speed, because inertial action, the fog drops strikes on the defroster blade and is caught the collection, and the fog drops when the entrapment is more and more, falls after reaching certain weight, reentrants desulfurizing tower.
The traditional baffle plate demister comprises a flat plate demister and a ridge demister, and the particle size of removed fog drops is more than 15 mu m; the baffling board defroster is easy scale deposit and is blockked up, and in actual operation, in order to guarantee the normal operation of equipment, need regularly wash, cause desulfurization system waste water volume great. Meanwhile, the traditional baffle plate demister has limited dedusting effect, and if a dedusting device such as a wet electrostatic precipitator and the like is not arranged at the rear end of the desulfurization, the dust concentration at the outlet of the absorption tower is difficult to ensure to be lower than 20mg/Nm3, not to mention that the ultralow emission of 5mg/Nm3 is realized.
Therefore, the dust removal and demisting performance of the demister is improved, and the method has important environmental protection and social significance.
Disclosure of Invention
The invention aims to provide a spiral dust and mist removing device, a mist removing device and an absorption tower so as to improve the dust and mist removing performance.
In order to solve the problems, the technical scheme of the invention is as follows:
the invention relates to a spiral dust and mist eliminator, which comprises:
the smoke-removing device comprises a barrel, wherein a hollow cavity which is used for enabling smoke to pass through and is communicated with two ends is arranged in the barrel;
the inner spiral part is detachably connected in the hollow cavity;
the outer spiral part is detachably connected into the inner spiral part;
the helical path of the inner helical portion is different from the helical path of the outer helical portion.
According to the spiral dust and mist removing device, the inner spiral part comprises a plurality of spiral strips; the spiral strips are respectively connected in the hollow cavity at intervals and attached to the wall, and are matched with the inner wall surface of the hollow cavity to form a spiral water collecting tank.
The spiral dust and mist eliminator comprises an outer spiral part, a first spiral part and a second spiral part, wherein the outer spiral part comprises spiral blades and a rod body; the helical blade is annularly arranged on the rod body; the outer side surface of the spiral blade is connected to the plurality of spiral strips of the spiral water collecting tank in an adherent mode.
According to the spiral dust and mist removal device, the rod body is provided with the through hole communicated with an external cleaning device.
According to the spiral dust and mist removing device, the spiral water collecting groove and the spiral blades are opposite in spiral direction.
The barrel, the inner spiral part and the outer spiral part are made of polypropylene plastics or fiber reinforced plastics.
The invention relates to a demisting device, which comprises a filter plate and the spiral dust and mist eliminator; the filter plate is provided with a plurality of accommodating through holes for accommodating the spiral dust and mist remover; the spiral dust removal demister is arranged in the accommodating through hole.
The absorption tower is provided with the defogging device.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1. in one embodiment of the invention, the demister is arranged into a cylinder body with two communicated ends, the inner wall surface of the cylinder body is detachably connected with an internal thread part, and the internal thread part is internally provided with an external 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 barrel body, the flue gas enters the external thread part and forms a high-speed centrifugal force, so that fog drops and dust contained in the flue gas are expanded outwards and separated from the flue gas to enter 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 through the difference of thread paths, the dust and the fog drops are prevented from being secondarily entrained, and finally the effect of further improving dust removal and demisting is achieved.
2. According to the embodiment of the invention, the rod body is arranged to be the hollow rod body, so that flushing water can be introduced, and the flushing efficiency of the device is improved; on the other hand, the internal thread part and the external thread part can be freely drawn out of the spiral cylinder, so that the maintenance is convenient.
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 the outer helical portion of the present invention;
FIG. 3 is an installation floor plan of the absorber tower of the present invention;
FIG. 4 is a plan view of an installation of an absorption tower of the present invention;
FIG. 5 is another installation floor plan of the absorption tower of the present invention.
Description of reference numerals: 1: an absorption tower; 21: a first-stage ridge demister; 22: a second level ridge mist eliminator; 3: a spiral dust and mist remover; 31: a barrel; 32: an inner spiral portion; 33: an outer spiral portion; 331: a helical blade; 332: a rod body; 4: and supporting the beam.
Detailed Description
The spiral dust and mist eliminator, the mist eliminator and the absorption tower provided by the invention are further described in detail with reference to the attached drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Example one
Referring to fig. 1 and 2, in one embodiment, a spiral dust and mist eliminator 3 comprises: the barrel 31 is provided with a hollow cavity which is used for enabling the two ends of the smoke to be communicated with each other. The inner helical portion 32 is removably connected within the hollow cavity. The outer spiral portion 33 is detachably coupled to the inner spiral portion 32. Meanwhile, the spiral path of the inner spiral portion 32 is different from that of the outer spiral portion 33.
By providing the spiral dust and mist eliminator 3 as a cylindrical body 31 having both ends communicating with each other, an internal thread portion is detachably connected to the inner wall surface of the cylindrical body 31, and an external thread portion is provided in the internal thread 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 31, the flue gas enters the external thread part and forms a high-speed centrifugal force, so that fog drops and dust contained in the flue gas are expanded outwards and separated from the flue gas to enter the threads of the internal thread part, and the fog drops and the dust are blocked by the threads of the internal thread part and flow down along the threads through the difference of thread paths, so that the dust and the fog drops are prevented from being secondarily entrained, and finally, the effects of further improving dust removal and demisting are achieved.
In the present embodiment, the inner spiral portion 32 includes a plurality of spiral strips; the spiral strips are respectively connected in the hollow cavity body at intervals and attached to the wall, and are matched with the inner wall surface of the hollow cavity body to form a spiral water collecting tank. The adherence is connected that the diameter of cavity is slightly less than the external diameter of spiral strip on the horizontal plane promptly, and the spiral strip is packed into the cavity back, directly contacts and realizes fixing through frictional force with the internal face of barrel 31. When maintenance or service is required, the helical strip can be pulled directly out of the barrel 31. In other embodiments, the inner wall surface of the cylinder 31 may also be directly provided with a groove adapted to the spiral strip, the spiral strip is directly plugged into the cylinder 31 and then clamped into the adapted groove, or the spiral strip and the cylinder 31 may be detachably connected through other manners, which is not specifically limited herein.
In the present embodiment, the outer spiral portion 33 includes a spiral blade 331 and a rod body 332; the helical blade 331 is arranged around the rod body 332; the outer side surfaces of the spiral blades 331 are attached to the spiral strips of the spiral water collecting tank. That is, the helical blade 331 is integrally formed with the rod body 332, and the adherent connection of the helical blade 331 is such that the inner diameter of the helical strip is slightly smaller than the diameter of the helical blade 331. Thus, when the screw blade 331 is inserted into the barrel 31 to which the screw is attached, it can be brought into contact with the inner surface of the inner diameter of the screw and fixed by the frictional force of the contact surface. When maintenance or service is required, the helical blade 331 can be pulled directly out of the helical strip. In other embodiments, the inner surface of the helical strip may also be directly provided with a groove adapted to the helical blade 331, the helical blade 331 is directly plugged into the barrel 31 and then is clamped into the groove adapted to the helical strip, or the helical blade 331 and the helical strip may be detachably connected through other manners, which is not limited herein. Of course, the lower end helical radius and the upper end helical radius of the helical blade are the same, and the upper end helical radius may be set smaller than the lower end helical radius, and the specific setting of the helical radius is not limited herein.
Further, a through hole communicating with an external cleaning device is provided on the rod body 332. That is, the rod body 332 is of a hollow structure, and the interior 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 helical water collection groove and the helical blade 331 are helical in opposite directions. If the spiral water collecting tank is designed to be in a reverse rotation mode, the spiral blades 331 are designed to be in a forward rotation mode; of course, the spiral water collecting trough can be designed to be a forward rotation type, and the spiral blades 331 can be designed to be a reverse rotation type, which is not limited herein. When the spiral directions are opposite, the flue gas enters the spiral blades 331 and is then centrifuged at a high speed, and the fog drops and dust separated outwards are blocked by the spiral strips of the reverse spiral water collecting tank and flow out along the spiral strips.
In the present embodiment, the cylinder 31, the inner spiral part 32 and the outer spiral part 33 are made of polypropylene plastic or fiber reinforced plastic, and the cylinder 31, the inner spiral part 32 and the outer spiral part 33 are made of polypropylene plastic or fiber reinforced plastic.
The flue gas purification process in the demister will be further described below.
After entering the spiral blades 331, the flue gas forms a high-speed centrifugal force, so that fog drops and dust contained in the flue gas expand outwards, and are thrown into the spiral water collecting tank after separating from the flue gas; the spiral water collecting groove is opposite to the spiral direction of the spiral blades 331, so that secondary entrainment can be avoided when dust and fog drops contact with flue gas in the downward flowing process, the dust and the fog drops smoothly flow downward along the wall surface of the spiral water collecting groove and return to the slurry pool, and the dust removal and demisting effects are realized. The spiral dust and mist eliminator 3 of the embodiment can effectively remove mist drops smaller than 15 microns and reduce the concentration of the mist drops at the outlet to 20mg/Nm3(ii) a Simultaneously effectively removing dust, and reducing the dust concentration at the outlet to 5mg/Nm3。
Example two
Referring to fig. 4, the demister of the present embodiment includes a filter plate and the spiral dust and mist eliminator 3 of the first embodiment; the filter plate is provided with a plurality of containing through holes for containing the spiral dust and mist eliminator 3, and the spiral dust and mist eliminator 3 is arranged in the containing through holes. The shape of filter plate can adapt to with the cross section of absorption tower to install in the absorption tower and realize sealed, make the flue gas all discharge behind spiral dust removal defroster 3. The number of the receiving 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 of the second embodiment.
When the requirement of dust removal defogging is higher, still can set up one-level ridge defroster 21 and second grade ridge defroster 22 and at least one defogging device respectively according to the flue gas flow direction in the flue. The demisting device is installed through a support beam 4 arranged in the absorption tower 1.
Carry out the defogging in advance by one-level ridge formula defroster 21 and second grade ridge formula defroster 22, carry out meticulous defogging by the defogging device again to further improve the dust removal defogging performance of absorption tower 1, under the prerequisite of guaranteeing 1 export fog droplet concentration of absorption tower, realize effectively getting rid of dust, reach ultralow emission requirement, have important environmental protection and social.
Of course, the absorption tower 1 can also cancel the first-stage ridge demister 21 and the second-stage ridge demister 22, and only adopt the demisting device to remove dust and demist, as shown in fig. 5, two layers of spiral demisting devices are provided in the embodiment, and of course, a plurality of layers of demisting devices can be provided according to specific situations, and no specific limitation is made here.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (8)
1. A spiral dust and mist eliminator, comprising:
the smoke-removing device comprises a barrel, wherein a hollow cavity which is used for enabling smoke to pass through and is communicated with two ends is arranged in the barrel;
the inner spiral part is detachably connected in the hollow cavity;
the outer spiral part is detachably connected into the inner spiral part;
the helical path of the inner helical portion is different from the helical path of the outer helical portion.
2. The spiral dust and mist eliminator of claim 1, wherein said inner spiral section comprises a plurality of spiral bars; the spiral strips are respectively connected in the hollow cavity at intervals and attached to the wall, and are matched with the inner wall surface of the hollow cavity to form a spiral water collecting tank.
3. The spiral dust and mist eliminator of claim 2, wherein said outer spiral section comprises helical blades and a rod; the helical blade is annularly arranged on the rod body; the outer side surface of the spiral blade is connected to the plurality of spiral strips of the spiral water collecting tank in an adherent mode.
4. The spiral dust and mist eliminator of claim 3 wherein said rod body is provided with through holes for communication with an external cleaning device.
5. The spiral dust and mist eliminator of claim 3, wherein said spiral water collection trough and said spiral vanes spiral in opposite directions.
6. The spiral dust and mist eliminator of claim 1, wherein said barrel, said inner spiral section and said outer spiral section are made of polypropylene plastic or fiber reinforced plastic.
7. A demister comprising a filter plate and a plurality of spiral dust and mist eliminators according to any one of claims 1 to 6; the filter plate is provided with a plurality of accommodating through holes for accommodating the spiral dust and mist remover; the spiral dust removal demister is arranged in the accommodating through hole.
8. An absorption tower provided with the demister according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097336.XA CN111111328A (en) | 2020-02-17 | 2020-02-17 | Spiral dust removal defroster, defogging device and absorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010097336.XA CN111111328A (en) | 2020-02-17 | 2020-02-17 | Spiral dust removal defroster, defogging device and absorption tower |
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| Publication Number | Publication Date |
|---|---|
| CN111111328A true CN111111328A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010097336.XA Pending CN111111328A (en) | 2020-02-17 | 2020-02-17 | Spiral dust removal defroster, defogging device and absorption tower |
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| CN (1) | CN111111328A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729508A (en) * | 2020-06-23 | 2020-10-02 | 苍龙集团有限公司 | Mixed induced flow spraying deodorization device |
| CN111744358A (en) * | 2020-06-23 | 2020-10-09 | 苍龙集团有限公司 | Intelligent integrative vortex sprays deodorization equipment |
| CN112933841A (en) * | 2021-02-07 | 2021-06-11 | 华南理工大学 | Secondary-carrying-prevention spiral groove demisting and dedusting device and method |
-
2020
- 2020-02-17 CN CN202010097336.XA patent/CN111111328A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729508A (en) * | 2020-06-23 | 2020-10-02 | 苍龙集团有限公司 | Mixed induced flow spraying deodorization device |
| CN111744358A (en) * | 2020-06-23 | 2020-10-09 | 苍龙集团有限公司 | Intelligent integrative vortex sprays deodorization equipment |
| CN112933841A (en) * | 2021-02-07 | 2021-06-11 | 华南理工大学 | Secondary-carrying-prevention spiral groove demisting and dedusting device and method |
| CN112933841B (en) * | 2021-02-07 | 2022-08-12 | 华南理工大学 | Secondary-carrying-prevention spiral groove demisting and dedusting device and method |
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