CN220531208U - Wet flue gas desulfurization gas-liquid equipartition device - Google Patents
Wet flue gas desulfurization gas-liquid equipartition device Download PDFInfo
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- CN220531208U CN220531208U CN202322070715.1U CN202322070715U CN220531208U CN 220531208 U CN220531208 U CN 220531208U CN 202322070715 U CN202322070715 U CN 202322070715U CN 220531208 U CN220531208 U CN 220531208U
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- uniform distribution
- liquid uniform
- liquid
- distribution device
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- 239000007788 liquid Substances 0.000 title claims abstract description 98
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 40
- 230000023556 desulfurization Effects 0.000 title claims abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000003546 flue gas Substances 0.000 title claims abstract description 24
- 238000009827 uniform distribution Methods 0.000 claims abstract description 78
- 238000010521 absorption reaction Methods 0.000 claims abstract description 40
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 18
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 20
- 239000007791 liquid phase Substances 0.000 description 7
- 239000002002 slurry Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a wet desulfurization gas-liquid uniform distribution device, which comprises a plurality of gas-liquid uniform distribution units, wherein each gas-liquid uniform distribution unit is connected with each other to form a planar structure and is fixedly arranged between a flue gas inlet and a lowest spraying layer and/or between spraying layers in an absorption tower; the equipartition unit is the ripple plate structure, a plurality of through-holes have been seted up on the ripple plate. Through the structural arrangement of the wet desulfurization gas-liquid uniform distribution device, a stable liquid-holding layer can be formed above the gas-liquid uniform distribution device, and the adaptability to gas-liquid load changes is improved.
Description
Technical Field
The utility model belongs to the technical field of wet flue gas desulfurization, and particularly relates to a wet desulfurization gas-liquid uniform distribution device.
Background
At present, limestone-gypsum wet desulfurization is the most widely applied in the flue gas desulfurization process of large-scale thermal power plants in China, and a sulfur dioxide absorption system in the process is the core of the whole desulfurization process system and mainly comprises equipment such as an absorption tower, a slurry circulating pump, an oxidation fan and the like. The absorption tower is of a countercurrent spray structure, the bottom is a slurry pool, the middle part is a spray washing area, and the upper part is provided with a demister. The spray washing area is generally provided with a plurality of spray layers, and when the flue gas ultra-low emission or the desulfurization efficiency requirement is high, a single-layer or multi-layer gas-liquid uniform distribution device is generally adopted.
The gas-liquid uniform distribution device is a plate with small holes or long slits, so that the slurry sprayed by the absorption tower can form a liquid-holding layer with a certain height above the gas-liquid uniform distribution device, the rising flue gas in the absorption tower is promoted to be uniformly distributed, the mixed flow of the flue gas is relieved, the friction turbulence generated by the rising of the flue gas is overcome, the short circuit of the flue gas is prevented, the sulfur-containing and dust-containing flue gas and the desulfurization slurry are enabled to fully contact and react, the gas-liquid two-phase mass transfer is enhanced, and the desulfurization efficiency and the collaborative dust removal efficiency of the absorption tower are improved.
The gas-liquid uniform distribution device of the mainstream in the industry is of a planar structure, for example, the gas-liquid uniform distribution device of the patent technology of U.S. Pat. No. 4263021 disclosed in 1981 by U.S. B & W adopts a horizontal steel plate for hole opening. However, the vapor-liquid uniform distribution device with the planar structure has the following defects: the gas phase and the liquid phase pass through the same hole, so that the smoke resistance is high; the liquid-holding layer is easy to be unstable in height and small in operation elasticity.
Disclosure of Invention
The utility model aims at: in order to overcome the problems in the prior art, the utility model discloses a wet desulfurization gas-liquid uniform distribution device, and by the structural arrangement of the wet desulfurization gas-liquid uniform distribution device, a relatively stable liquid-holding layer can be formed above the gas-liquid uniform distribution device, so that the adaptability to gas-liquid load changes is improved.
The aim of the utility model is achieved by the following technical scheme:
the wet desulfurization gas-liquid uniform distribution device comprises a plurality of gas-liquid uniform distribution units, wherein each gas-liquid uniform distribution unit is connected with each other to form a planar structure and is fixedly arranged between a flue gas inlet and a lowest spraying layer and/or between spraying layers in an absorption tower; the equipartition unit is the ripple plate structure, a plurality of through-holes have been seted up on the ripple plate.
According to a preferred embodiment, the corrugated plate has a sinusoidal structure.
According to a preferred embodiment, the diameter of the through holes in the crest area of the corrugated plate is smaller than or equal to the diameter of the through holes in the trough area.
According to a preferred embodiment, the distance between the through holes in the wave crest region of the corrugated plate is smaller than or equal to the distance between the through holes in the wave trough region.
According to a preferred embodiment, the sinusoidal wave height h is 50mm to 300mm and the half wavelength b is 50mm to 400mm.
According to a preferred embodiment, when the liquid-gas ratio in the absorption tower is small, the wave height takes a low value and the half wavelength takes a high value; when the liquid-gas ratio is large, the wave height takes a high value and the half wavelength takes a low value.
According to a preferred embodiment, the corrugated plate is made of a corrosion-resistant and wear-resistant material, and the thickness delta is in the range of 2-6 mm.
According to a preferred embodiment, adjacent through holes are arranged in triangular end positions or square end positions.
According to a preferred embodiment, each through hole on the corrugated plate is of a round hole structure, and the diameter of each hole is 20-70 mm; the aperture ratio range of the through holes on the corrugated plate is 30% -60%.
According to a preferred embodiment, the wet desulfurization gas-liquid uniform distribution device further comprises a first fixed connecting piece, a second fixed connecting piece, a third fixed connecting piece and a supporting beam; the supporting beam is erected in the absorption tower and is fixed on the wall of the absorption tower; each gas-liquid uniform distribution unit is fixedly connected with the supporting beam through a first fixed connecting piece, the adjacent gas-liquid uniform distribution units are mutually connected through a second fixed connecting piece, and the gas-liquid uniform distribution unit close to the wall of the absorption tower is connected with the wall of the absorption tower through a third fixed connecting piece.
The foregoing inventive concepts and various further alternatives thereof may be freely combined to form multiple concepts, all of which are contemplated and claimed herein. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The utility model has the beneficial effects that:
the wet desulfurization gas-liquid uniform distribution device can improve the flue gas flow field in the absorption tower, enhance the mass transfer effect of gas and liquid phases, improve the desulfurization efficiency by 2-8%, and improve the synergistic dedusting efficiency of the absorption tower by 5-10%.
The wet desulfurization gas-liquid uniform distribution device adopts the corrugated plate structure, gas mainly passes through the wave crest and the holes at the side, and liquid mainly falls from the holes of the wave trough, so that the smoke resistance of the gas-liquid uniform distribution device can be reduced by 50-300Pa compared with that of a flat plate gas-liquid uniform distribution device.
The wet desulfurization gas-liquid uniform distribution device adopts the corrugated plate structure, so that the height of the formed liquid holding layer is more stable, and the adaptability to gas-liquid load changes can be improved.
Drawings
FIG. 1 is a schematic diagram of a wet desulfurization gas-liquid uniform distribution device;
FIG. 2 is a schematic diagram showing a top view structure of a gas-liquid uniform distribution unit in the wet desulfurization gas-liquid uniform distribution device of the present utility model;
FIG. 3 is a schematic view along the direction A of the gas-liquid uniform distribution unit in FIG. 2;
FIG. 4 is a diagram showing the arrangement of through holes in a gas-liquid uniform distribution unit in the wet desulfurization gas-liquid uniform distribution device of the present utility model;
wherein, 1-gas-liquid equipartition unit, 2-first fixed connection spare, 3-second fixed connection spare, 4-third fixed connection spare, 5-supporting beam, 6-absorption tower wall.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, in the present utility model, if a specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, position relationship, power source relationship, etc. related to the present utility model can be known by those skilled in the art without any creative effort.
Referring to fig. 1 to 4, there is shown a wet desulfurization gas-liquid uniform distribution device including a plurality of gas-liquid uniform distribution units 1, a first fixed connection member 2, a second fixed connection member 3, a third fixed connection member 4, and a support beam 5.
Preferably, each gas-liquid uniform distribution unit 1 is connected with each other to form a planar structure and is fixedly arranged between a flue gas inlet and the lowest spraying layer and/or between spraying layers in the absorption tower. The number of each gas-liquid uniform distribution unit 1 is customized according to the diameter of the absorption tower, so that the convenience of transportation and on-site assembly is ensured while the structural strength is ensured.
Further, the gas-liquid uniform distribution unit 1 can be provided with one or more layers in the absorption tower according to the process requirement.
Preferably, the support beam 5 is erected in the absorption tower and is fixed on the wall 6 of the absorption tower; each gas-liquid uniform distribution unit 1 is fixedly connected with a supporting beam 5 through a first fixed connecting piece 2, the adjacent gas-liquid uniform distribution units 1 are mutually connected through a second fixed connecting piece 3, and the gas-liquid uniform distribution unit 1 close to the absorption tower wall 6 is connected with the absorption tower wall 6 through a third fixed connecting piece 4.
Preferably, the gas-liquid uniform distribution unit 1 is a corrugated plate structure, and a plurality of through holes are formed in the corrugated plate. Each through hole is used for the circulation of gas and/or liquid.
Further, the corrugated plate has a sinusoidal structure. In the embodiment, the wave height h of the sinusoidal curve is 50-300 mm, and the half wavelength b is 50-400 mm.
When the liquid-gas ratio in the absorption tower is small, the wave height takes a low value and the half wavelength takes a high value; when the liquid-gas ratio is large, the wave height takes a high value and the half wavelength takes a low value.
When the absorption tower operates, the flue gas flows from bottom to top, the slurry sprayed by the spraying layer flows from top to bottom, and the gas and the liquid are in countercurrent contact. As the flue gas passes through the through holes of the gas-liquid uniform distribution unit 1, the flue gas can be distributed more uniformly, most of the gas flow velocity is in the average flow velocity range, the bias flow of the flue gas is prevented, and the flue gas flow field in the absorption tower is improved.
Preferably, the diameter of the through holes in the wave crest area of the corrugated plate is smaller than or equal to the diameter of the through holes in the wave trough area. The distance between the through holes in the wave crest region on the corrugated plate is smaller than or equal to the distance between the through holes in the wave trough region.
Further, the heights of the liquid holding layers above the corrugated plate type gas-liquid uniform distribution unit 1 are different, the height of the liquid holding layer in the wave crest area is minimum, and the liquid holding layers are arranged based on the corresponding aperture, so that smoke mainly passes through holes in the wave crest area, and liquid mainly falls off through holes in the wave trough area. Compared with a gas-liquid uniform distribution device with a planar structure, the total flow area of gas and liquid phases is increased, so that the smoke resistance of the gas-liquid uniform distribution device can be reduced, the overall resistance of an absorption tower system is further reduced, and the power consumption of a draught fan of a power plant is saved.
Therefore, the corrugated plate type gas-liquid uniform distribution unit 1 improves the circulation mode of gas and liquid phases, so that the height of a liquid holding layer formed above the gas-liquid uniform distribution unit 1 is more stable, and the operation elasticity of the absorption tower is increased. The flue gas strengthens the mass transfer effect of the gas phase and the liquid phase through the liquid-holding layer, prolongs the contact time of the gas phase and the liquid phase in the absorption tower, and improves the desulfurization efficiency and the collaborative dust removal efficiency of the absorption tower.
Preferably, the corrugated plate is made of 2205 duplex stainless steel or other corrosion and wear resistant material. The thickness delta of the corrugated plate ranges from 2 mm to 6mm.
Preferably, each through hole on the corrugated plate is of a round hole structure, and the diameter range of the open hole is 20-70 mm; the aperture ratio range of the through holes on the corrugated plate is 30% -60%.
Preferably, as shown with reference to fig. 4, adjacent through holes are arranged in triangular end point positions or square end point positions.
Examples
Taking a limestone-gypsum wet desulfurization project as an example, the following will be described with reference to fig. 1 to 4:
the absorber of this example was circular and had a diameter of 12 meters. The corresponding gas-liquid uniform distribution device is round as a whole, the gas-liquid uniform distribution units 1 are connected through the second fixed connecting piece 3 during installation, the gas-liquid uniform distribution units 1 are connected with the supporting beam 5 through the first fixed connecting piece 2, and are connected with the absorption tower wall 6 through the third fixed connecting piece 4.
The gas-liquid uniform distribution device of the embodiment consists of 108 gas-liquid uniform distribution units 1, 184 sets of first fixed connecting pieces 2, 378 sets of second fixed connecting pieces 3 and 80 sets of third fixed connecting pieces 4.
The bottom of the gas-liquid uniform distribution unit 1 adopts a corrugated plate structure, and uniform holes are formed in the corrugated plate.
The holes of the unit modules of the gas-liquid uniformly-distributing device are circular, the holes are arranged according to regular triangles, the included angle alpha=60 degrees, the aperture D=35 mm, the aperture ratio is 38%, and the center distance l=57 mm.
The gas-liquid uniform distribution unit 1 is made of 2205 duplex stainless steel.
The thickness of the gas-liquid uniform distribution unit 1 is 3mm.
The corrugation of the corrugated plate is sinusoidal, the wave height h=200mm, and the half wavelength b=300mm.
The installation position of the gas-liquid uniform distribution device is between the flue gas inlet of the absorption tower and the lowest spraying layer, and is positioned 2000mm above the flue gas inlet and 1800mm below the lowest spraying layer.
The single set of fixed connecting pieces consists of bolts, nuts and gaskets, wherein the first fixed connecting piece 2 consists of 1M 12 multiplied by 60 bolts, 2 matched nuts and 2 gaskets; the second fixed connecting piece 3 consists of 1M 12 x 20 bolt, 2 matched nuts and 2 gaskets; the third fixed connection 4 consists of 1M 12 x 50 bolt and 2 mating nuts and 2 shims. The bolt and the nut are made of 2205 duplex stainless steel, and the gasket is made of butyl rubber.
The wet desulfurization gas-liquid uniform distribution device can improve the flue gas flow field in the absorption tower, enhance the mass transfer effect of gas and liquid phases, improve the desulfurization efficiency by 2-8%, and improve the synergistic dedusting efficiency of the absorption tower by 5-10%.
The wet desulfurization gas-liquid uniform distribution device adopts the corrugated plate structure, gas mainly passes through the wave crest and the holes at the side, and liquid mainly falls from the holes of the wave trough, so that the smoke resistance of the gas-liquid uniform distribution device can be reduced by 50-300Pa compared with that of a flat plate gas-liquid uniform distribution device.
The wet desulfurization gas-liquid uniform distribution device adopts the corrugated plate structure, so that the height of the formed liquid holding layer is more stable, and the adaptability to gas-liquid load changes can be improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The wet desulfurization gas-liquid uniform distribution device is characterized by comprising a plurality of gas-liquid uniform distribution units (1),
the gas-liquid uniform distribution units (1) are connected with each other to form a planar structure which is fixedly arranged between a flue gas inlet and a lowest spraying layer and/or between spraying layers in the absorption tower;
the gas-liquid uniform distribution unit (1) is of a corrugated plate structure, and a plurality of through holes are formed in the corrugated plate.
2. The wet desulfurization gas-liquid uniform distribution device according to claim 1, wherein the corrugated plate has a sinusoidal structure.
3. The wet desulfurization gas-liquid uniform distribution device according to claim 1 or 2, wherein the diameter of the through holes in the crest region of the corrugated plate is equal to or smaller than the diameter of the through holes in the trough region.
4. The wet desulfurization gas-liquid uniform distribution device according to claim 1 or 2, wherein the distance between the through holes in the crest region of the corrugated plate is smaller than or equal to the distance between the through holes in the trough region.
5. The wet desulfurization gas-liquid uniform distribution device according to claim 2, wherein the sinusoidal wave height h is 50 mm-300 mm and the half wavelength b is 50 mm-400 mm.
6. The wet desulfurization gas-liquid uniform distribution device according to claim 5, wherein when the liquid-gas ratio in the absorption tower is less than 25, the wave height h is 50 mm-150 mm, and the half wavelength b is 200 mm-400 mm; when the liquid-gas ratio is more than or equal to 25, the wave height h is 150-300 mm, and the half wavelength b is 50-200 mm.
7. The wet desulfurization gas-liquid uniform distribution device according to claim 1, wherein the corrugated plate is made of corrosion-resistant and wear-resistant materials, and the thickness delta is in the range of 2-6 mm.
8. The wet desulfurization gas-liquid uniform distribution device according to claim 1, wherein adjacent through holes are arranged in a triangular end position or a square end position.
9. The wet desulfurization gas-liquid uniform distribution device according to claim 1 or 8, wherein each through hole on the corrugated plate is of a round hole structure, and the diameter of the open hole is 20-70 mm; the aperture ratio range of the through holes on the corrugated plate is 30% -60%.
10. The wet desulfurization gas-liquid uniform distribution device according to claim 1, further comprising a first fixed connecting piece (2), a second fixed connecting piece (3), a third fixed connecting piece (4) and a supporting beam (5);
the supporting beam (5) is erected in the absorption tower and is fixed on the wall (6) of the absorption tower;
each gas-liquid uniform distribution unit (1) is fixedly connected with a supporting beam (5) through a first fixed connecting piece (2), the adjacent gas-liquid uniform distribution units (1) are mutually connected through a second fixed connecting piece (3), and the gas-liquid uniform distribution units (1) close to the absorption tower wall (6) are connected with the absorption tower wall (6) through a third fixed connecting piece (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322070715.1U CN220531208U (en) | 2023-08-03 | 2023-08-03 | Wet flue gas desulfurization gas-liquid equipartition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322070715.1U CN220531208U (en) | 2023-08-03 | 2023-08-03 | Wet flue gas desulfurization gas-liquid equipartition device |
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| Publication Number | Publication Date |
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| CN220531208U true CN220531208U (en) | 2024-02-27 |
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| CN202322070715.1U Active CN220531208U (en) | 2023-08-03 | 2023-08-03 | Wet flue gas desulfurization gas-liquid equipartition device |
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| CN (1) | CN220531208U (en) |
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