CN209378469U - Gas distributor and spray-drying installation - Google Patents
Gas distributor and spray-drying installation Download PDFInfo
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- CN209378469U CN209378469U CN201821006860.6U CN201821006860U CN209378469U CN 209378469 U CN209378469 U CN 209378469U CN 201821006860 U CN201821006860 U CN 201821006860U CN 209378469 U CN209378469 U CN 209378469U
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Abstract
The utility model relates to a kind of gas distributor and spray-drying installation, which includes: vertical axis (3)；Circumferential wall (5), the circumferential direction wall extend around the vertical axis (3) and including air inlet openings (7)；First tapered wall (9), first tapered wall are arranged around the vertical axis (3)；One group of guide vane (11), these guide vanes are arranged around the vertical axis (3) and first tapered wall (9)；And admission line (15), the admission line are attached to the air inlet openings (7) of the first tapered wall (9) upstream relative to the overall flow direction for passing through the gas distributor (1).The admission line (15) includes stream aligning section, which aligns section offer aligning stream and enter the air inlet openings (7).
Description
Technical field
The utility model relates to a kind of gas distributor for spray-drying installation, the gas distributor includes: perpendicular
Straight axis；Circumferential wall, the circumferential direction wall extend around vertical axis and including air inlet openings；First tapered wall, first taper
Wall is arranged around the vertical axis；One group of guide vane, these guide vanes are around the vertical axis and the first tapered wall cloth
It sets；And admission line, the admission line are attached to first taper relative to the overall flow direction for passing through gas distributor
The air inlet openings of wall upstream.
The utility model further relates to a kind of include spray dryer room, at least one atomizer and the dispersion of at least one gas
The spray-drying installation of device.
Particularly, the utility model relates to a kind of spray dry absorbingatreatingastep devices and a kind of gas dispersion for this device
Device.
Background technique
Spray-drying installation or spray dryer (also referred to as comvection dryer) are well known in the art and are used for
Many purposes.Thus, for example in food, dairy products and chemical industry, spray dryer is used for by by liquid feedstock and gas
It is ejected into together and comes to provide the granular of drying, graininess and/or powdery product, the gas from liquid feedstock in spray dryer room
Body makes the solvent of liquid feedstock evaporate and may react with charging.
Therefore, spray-drying process can be used for from such as flue gas removing undesired ingredient and providing emission control.
Such as can fossil-fuelled power-plants, trash burner and industrial plants (be such as but not limited to sintering in steel and iron industry and
Pelletizing plant) in removal flue gas and acid contaminant, heavy metal and dust in exhaust gas.Containing acid contaminant (such as SO2,
SO3, HCl and HF) gas be introduced into the spray dryer room of spray-drying installation and be absorbed in as slurry provide
In absorbent, which is to be such as but not limited to be atomized and spray into the calcium hydroxide in the gas stream of the room.It is most of in gas
Acidic components are absorbed into alkali droplet.Gas distribution, slurry flow and drop size are controlled, so that drop is dried to easily
In the stabilization of storage and transport and the powdery product of drying.
When for absorbing ingredient from gas, spray-drying installation is commonly known as spray dry absorbingatreatingastep device, and
Spray dryer room is accordingly called spray dry absorbingatreatingastep room etc..Therefore, the term as used herein " spray drying " and " spraying
Drier " covers " spray dry absorbingatreatingastep " and " spray dryer absorption " respectively.
In order to promote the effective procedure of spray dryer chamber interior, using gas disperser introduces a gas into spray dryer
In room.Influence of the VELOCITY DISTRIBUTION by guide vane of the gas of gas distributor is flowed through, so that when these guide vanes are fitted
When the installation of locality, the whirlpool of dry gas stream is obtained.Further and importantly, guide vane makes gas along gas distributor
The perimeter of outlet be uniformly distributed.
Therefore, gas distributor is used to optimize the gas distribution of spray dryer chamber interior, promotes the mist of gas and charging
Change the optimum contact between drop.
However, traditional spray-drying installation (including their gas distributor), is especially such as used for flue gas emission
The spray-drying installation of control, figure are big, complex and costly.Therefore, the known gas in spray dry absorbingatreatingastep device
Disperser has about 25 tons of weight.
Utility model content
In this context, the purpose of this utility model is mentioned by providing a kind of gas distributor for some process
For the gas distributor and spray-drying installation of weight saving, in this process, has and disperse to constant volume and the gas of performance
The material that device needs is less.
The purpose is realized by the gas distributor for spray-drying installation, and the gas distributor includes: vertical axes
Line；Circumferential wall, the circumferential direction wall extend around vertical axis and including air inlet openings；First tapered wall, first tapered wall are enclosed
It is arranged around the vertical axis；One group of guide vane, these guide vanes are arranged around the vertical axis and first tapered wall；With
And admission line, the admission line are attached in first tapered wall relative to the overall flow direction for passing through the gas distributor
The air inlet openings of trip, the gas distributor are characterized in that the admission line includes stream aligning section, which provides aligning
Stream enters the air inlet openings.First tapered wall is preferably cone and has coning angle.
Gas distributor is usually placed on to the top of spray dryer room, the spray dryer room itself is high construction,
Therefore the entrance of gas distributor is placed in relatively high position.Therefore, it is usually located at beside spray dryer room or is located at and hold
Gas is led to the entry position of gas distributor, the vertical pipe by the vertical pipeline beside the building of spray dryer room of receiving
Road is connected to 90 ° of pipe bend or bend pipe of admission line, and the admission line usually further comprises being connected to gas
The approximate horizontal pipeline member of the air inlet openings of the circumferential wall of disperser.The Known designs for guiding the pipeline of gas distributor into may
The gas turbulence for reaching the very uneven distribution of gas distributor is generated, but known gas distributor is provided with a large amount of guiding
Blade and generally allow for this non-uniform turbulent flow.
The simple stream of air inlet openings setting adjacent to the circumferential wall of gas distributor has aligned section unexpectedly
Allow to the quantity of the guide vane in this group of guide vane of significant reduction, while still being obtained in gas distributor exit
Satisfactory uniform flow distribution.For example, can eliminate half guide vane compared with known gas distributor or eliminate every
One the second guide vane.
In embodiment, the stream aligning section of admission line includes at least one pipeline guide vane.Such pipeline is led
It can be positioned to blade in the pipe bend or bend pipe adjacent with short approximate horizontal pipeline member, the pipeline member is by pipeline
Bending section is connected to the air inlet openings of the circumferential wall of gas distributor.
It should be noted that " approximate horizontal " should be understood compared with vertical direction closer to level side in term
To.Therefore, it includes being less than +/- 45 ° relative to horizontal direction, being less than preferably relative to horizontal direction that term is " approximate horizontal "
+/- 30 ° and be +/- 15 ° of gradient especially with respect to horizontal direction.
In another or further embodiment, the stream aligning section of admission line includes adjacent with air inlet openings straight
Pipe section, the straight pipeline section have hydraulic diameter and are the length of hydraulic diameter at least three times, preferably the straight pipeline
The length of section is greater than four times of hydraulic diameter, and it is highly preferred that the length of the straight section is greater than five times of hydraulic diameter.
It should be noted that the hydraulic diameter Dh of pipeline is defined as:
Dh=4A/P,
Wherein, A is the cross-sectional area of pipeline, and P is the perimeter of pipeline.
Usual gas distributor has can be for example with m3/ h (hour) is the nominal capacity of unit measurement.Around vertical axes
Whole guide vanes of line arrangement have can be with m2For the total surface area of unit measurement.In gas according to the present utility model
In the embodiment of disperser, the ratio between the nominal capacity and the gross area is at least 15000m3/h/m2, preferably described
Ratio is at least 25000m3/h/m2, and the more preferably described ratio is at least 30000m3/h/m2, for example, about 33000m3/h/
m2。
In a further embodiment, the second tapered wall is around the first tapered wall and this group of guide vane arrangement.
In still further embodiments, third tapered wall is arranged between the first tapered wall and the second tapered wall, is mentioned
To first group of guide vane be arranged between the first tapered wall and third tapered wall, and second group of guide vane is arranged in
Between two tapered walls and third tapered wall.It is known which improve the quality of gas distributor distributing gas.Second tapered wall and
At least one of triconic wall preferably has coning angle similar with the coning angle of the first tapered wall.
The outlet of gas distributor extends around the first tapered wall.In the embodiment for including the second tapered wall, outlet exists
Extend between first tapered wall and the second tapered wall.In the embodiment for including third tapered wall, outlet is by third tapered wall point
At the section of two preferred annulars.
In a further embodiment, for the access of the gas flowing in gas distributor towards the first tapered wall and the
Spatially extended between two tapered walls, one group of inlet guide vane is arranged in the access, described group of inlet guide vane packet
Multiple inlet guide vanes are included, each inlet guide vane constitutes a part with up-front periphery, which has
The direction being in tilted layout relative to vertical axis.Position the entrance directing vane having relative to the inclined leading edge direction of vertical axis
Piece makes the overall dimension for reducing gas distributor, to allow further to save material.
In a further embodiment, spatially extended between access the first tapered wall of direction and the second tapered wall, it is described
Access extends from volute road, and between access and admission line, the volute road includes the circumferential wall in the volute road.By
This provides the gas distribution around gas distributor.
In embodiment, volute road provides converging passageway around at least part of vertical axis.Thus it provides and surrounds gas
The gas distribution more evenly of body disperser.
The purpose further pass through it is a kind of include spray dryer room, at least one atomizer and at least one according to this reality
It is realized with the spray-drying installation of novel gas distributor.
In embodiment, at least one atomizer is the rotary atomizer for example with construction known per se.
Detailed description of the invention
Hereinafter, it will be described in further detail by following description of preferred embodiments and referring to attached drawing practical
It is novel, in the accompanying drawings
Fig. 1 is the schematic transparent side view of the prior embodiment of gas distributor；
Fig. 2 is the schematic transparent side view of gas distributor according to the present utility model；
Fig. 3 is the perspective view of gas distributor according to the present utility model, and the multiple portions of admission line are omitted；
Fig. 4 is the top view of the gas distributor of Fig. 3；
Fig. 5 shows the vertical section along the line V-V in Fig. 4；
Fig. 6 is the cross-sectional perspective view of the gas distributor of Fig. 4；
Fig. 7 shows horizontal cross-section shown in the line VII-VII in Fig. 5；
Fig. 8 shows the perspective view of the bottom angled from the gas distributor of Fig. 3；
Fig. 9 be include pipeline guide vane pipe bend transparent view；
Figure 10 be do not include this pipeline guide vane pipe bend transparent view；And
Figure 11 shows prior art gas distributor shown in FIG. 1 and gas according to the present utility model shown in Fig. 2
The variation coefficient of disperser.
Specific embodiment
Fig. 1 shows the prior art gas distributor 101 for spray-drying installation.Gas distributor 101 has perpendicular
Straight axis 103, and circumferential wall 105 extends around vertical axis 103.Circumferential wall includes air inlet openings 107.First tapered wall
109 arrange around vertical axis 103, and two groups of guide vanes 111,113 surround vertical axis 103 and the first tapered wall 109
Arrangement.Admission line 115 is attached to 109 upstream of the first tapered wall relative to the overall flow direction for passing through gas distributor 101
Air inlet openings.
Second tapered wall 117 is arranged around the first tapered wall 109, and third tapered wall 119 is arranged in the first tapered wall
109 and second between tapered wall 117.First group of guide vane 111 be arranged in the first tapered wall 109 and third tapered wall 119 it
Between, second group of guide vane 113 is arranged between the second tapered wall 117 and third tapered wall 119.
Define that ring-shaped inner part exports between the first tapered wall 109 and third tapered wall 119.Arrow 118a indicates gas
It is flowed out by internal vent.Annular, outer outlet is limited between the second tapered wall 117 and third tapered wall 119.Arrow 118b
Instruction gas passes through externally ported outflow.
In the presence of the spatially extended access between the first tapered wall 109 of direction and the second tapered wall 117.One group of entrance guiding
Blade 121 is arranged in the access.This group of inlet guide vane 121 includes multiple inlet guide vanes, each entrance guiding
Blade constitutes a part with generator direction and up-front cylindrical surface.The generator direction and leading edge arrange vertically, therefore
It is parallel to vertical axis 103.
The access extends from the volute road 123 between the access and admission line 115.Volute road 123 includes circumferential
Wall 105, and volute road provides at least part of converging passageway for surrounding vertical axis 103.
Rotary atomizer 125 extends centrally through gas distributor 101 and is projected into 109 lower section of the first tapered wall.
The guide vane 111,113,121 of the different groups of this prior art gas distributor 101 respectively includes a large amount of
Guide vane, and the weight of gas distributor is about 25 tons.Gas distributor 101 has about 310000m3The mark of/h air-flow
Claim capacity, i.e., per hour into the m of the gas under actual temperature and pressure of gas distributor3, it is contemplated that each directing vane
Piece includes a bulk tablet, and for material piece tool there are two opposite side, every side has certain area, three groups of guide vanes 111,113,
121 gross area is about 35.2m2。
In an illustrated embodiment, admission line 115 includes bending section or the bend pipe of short horizontal pipe part 126 and 90 °
127, the bending section or bend pipe are connected to vertical pipeline 128 to supply gas to gas distributor 101.
Fig. 2 to Fig. 8 shows the gas distributor 1 according to the present utility model for spray-drying installation.Gas dispersion
Device 1 has vertical axis 3, and circumferential wall 5 extends around vertical axis 3.Circumferential wall includes air inlet openings 7.First tapered wall 9
It is arranged around vertical axis 3, and two groups of guide vanes 11,13 are arranged around vertical axis 3 and the first tapered wall 9.Air inlet pipe
Road 15 is attached to the air inlet openings of 9 upstream of the first tapered wall relative to the overall flow direction for passing through gas distributor 1.
Second tapered wall 17 is arranged around the first tapered wall 9, and third tapered wall 19 is arranged in the first tapered wall 9 and the
Between two tapered walls 17.First group of guide vane 11 is arranged between the first tapered wall 9 and third tapered wall 19, second group of guiding
Blade 13 is arranged between the second tapered wall 17 and third tapered wall 19.
Define that ring-shaped inner part exports between the first tapered wall 9 and third tapered wall 19.Arrow 18a instruction gas passes through
Internal vent outflow.Annular, outer outlet is limited between the second tapered wall 17 and third tapered wall 19.Arrow 18b indicates gas
Pass through externally ported outflow.
In the presence of the access 20 extended towards the space 22 between the first tapered wall 9 and the second tapered wall 17.One group of entrance is led
It is arranged in the access to blade 21.This group of inlet guide vane 21 includes multiple inlet guide vanes, each entrance guiding
Blade constitutes a part with the periphery in generator direction or leading edge direction 24.The generator direction or leading edge direction quilt
Be arranged as it is inclined, i.e., relative to vertical axis 3 have greater than zero angle α.Angle α shown in the embodiment 30 ° with 60 ° it
Between, especially between 40 ° and 50 °.
Access 20 extends from the volute road 23 between access 20 and admission line 15.Volute road 23 includes circumferential wall 5,
And volute road 23 provides at least part of converging passageway for surrounding vertical axis 3.
Rotary atomizer 25 extends centrally through gas distributor 1 and is projected into 9 lower section of the first tapered wall.
In an illustrated embodiment, admission line 15 includes bending section or the bend pipe 27 of short horizontal pipe part 26 and 90 °,
The bending section or bend pipe are connected to vertical pipeline 28 to supply gas to gas distributor 1.Pipeline guide vane 29 is in air inlet pipe
It is arranged at bend pipe 27 in road 15, to guide the gas for flowing through admission line 15 by bend pipe 27.Such as will further it solve below
It releases, pipeline guide vane 29 is used as stream straightener.
As setting pipeline guide vane 29 alternative solution or supplement, admission line between entrance 7 and bend pipe 27
Part (for example, short horizontal pipe part of the present embodiment) be length l that is straight and having at it be its hydraulic diameter
When at least three times of Dh, stream straightener can be provided.
Fig. 9 and Figure 10 illustrates the stream leveling effect of pipeline guide vane 29.What Fig. 9 showed admission line 15 includes curved
The section of pipe 27 and pipeline guide vane 29.Figure 10 shows identical admission line 15, but pipeline guide vane is omitted.Such as
Shown in Figure 10, when gas flows through admission line 15 as shown in arrow 31, when be not present pipeline guide vane when, along into
The turbulent region that the flowing of feed channel 15 greatly reduces is formed in the downstream of immediately bend pipe 27, as indicated at 33.Such as Fig. 9
Shown, when there are pipeline guide vane 29, compared with the region 33 in Figure 10, the range of region 33' is greatly reduced.In Figure 10
Bigger region 33 causes the gas stream in 27 downstream of bend pipe uneven on the cross-sectional area of admission line 15.It is managed by introducing
Road guide vane 29, with no pipeline guide vane 29 the case where compared with, the gas stream in 27 downstream of bend pipe more evenly or straightens.
Figure 11 show through prior art gas distributor 101 (being denoted as DGR shown in Fig. 1 and in Figure 11) and
The variation coefficient of the corresponding air flow of gas distributor 1 (DGX is denoted as shown in Fig. 2 and in Figure 11) according to the present utility model
Comparison.Figure 11 shows the stream for respectively flowing through in Figure 11 first group of guide vane 11 and 111 for being denoted as " inside " and divides
The comparison that is denoted as the stream of second group guide vane 11 and 113 of " outside " is not flowed through in Figure 11.Ideally, which answers
It should be 0 (zero), and show that respective streams were uniformly distributed around vertical axis 3,103.However, indicated by a little higher than 0 variation coefficient
Small variation is acceptable under normal circumstances.In the current situation, it can be seen that prior art gas distributor 101 is shown
Up to 3% variation coefficient, this is considered acceptable under normal circumstances, but (interior for flowing through first group of guide vane 11
Portion) stream and flow through the stream of second group of guide vane 13 (outside), gas distributor 1 according to the present utility model is shown even
Smaller variation coefficient.
Prior art gas distributor 101 and Fig. 2, Fig. 3 more shown in FIG. 1 are answered to gas distributor 1 shown in Fig. 8
Note that gas distributor 101 and 1 all has 310000m per hour3Nominal capacity (m3/ h) and to across gas distributor
1,101 gas provides identical whirlpool.However, prior art gas distributor 101 has 35.2m2Total directing vane it is unilateral
Product, but since guide vane quantity is reduced, gas distributor 1 according to the present utility model has 9.5m2Total directing vane it is unilateral
Product.Further, since inlet guide vane group has inclined angle alpha, it is possible to which gas distributor 101 is whole compared with the existing technology
The integral diameter of body diameter reduction gas distributor 1.Compared with prior art gas distributor 101, these measures have been gas
The construction of body disperser 1 saves lot of materials, compared with about 25 tons of prior art gas distributor 101 of weight, by gas
The weight of body disperser 1 is reduced to about 13 tons.
The utility model should not be considered limited to embodiment illustrated and described above, but appended power can not departed from
The various modifications and combinations of feature are carried out in the case where the range that benefit requires.
Claims (13)
1. a kind of gas distributor for spray-drying installation, the gas distributor (1) includes: vertical axis (3)；It is circumferential
Wall (5), the circumferential direction wall extend around the vertical axis (3) and including air inlet openings (7)；First tapered wall (9), first taper
Wall is arranged around the vertical axis (3)；First group of guide vane (11), these guide vanes are around the vertical axis (3) and are somebody's turn to do
First tapered wall (9) arrangement；And admission line (15), the admission line is relative to the totality for passing through the gas distributor (1)
Flow direction is attached to the air inlet openings (7) of the first tapered wall (9) upstream, which is characterized in that the admission line (15) packet
Stream aligning section is included, which aligns section and provide the aligning stream for entering the air inlet openings (7).
2. gas distributor according to claim 1, which is characterized in that the stream aligning section of the admission line includes extremely
A few pipeline guide vane (29).
3. gas distributor according to claim 1, which is characterized in that the stream of the admission line (15) aligns section packet
Include the straight pipeline section adjacent with the air inlet openings (7), the straight pipeline section have hydraulic diameter and be the hydraulic diameter extremely
The length (l) of few three times.
4. gas distributor according to claim 1, which is characterized in that the stream of the admission line (15) aligns section packet
Include the straight pipeline section adjacent with the air inlet openings (7), the straight pipeline section have hydraulic diameter and be the hydraulic diameter extremely
Few four times of length (l).
5. gas distributor according to claim 1, which is characterized in that the stream of the admission line (15) aligns section packet
Include the straight pipeline section adjacent with the air inlet openings (7), the straight pipeline section have hydraulic diameter and be the hydraulic diameter extremely
Few five times of length (l).
6. gas distributor according to any one of claim 1 to 5, which is characterized in that the gas distributor (1) has
With m3/ h is the nominal capacity of unit measurement, and all first group of guide vanes (11) arranged around the vertical axis (3),
Second group of guide vane (13) and one group of inlet guide vane (21) have with m2For unit measurement total surface area, and its
In, the ratio between the nominal capacity and the total surface area is at least 15000m3/h/m2。
7. gas distributor according to any one of claim 1 to 5, it is characterised in that the second tapered wall (17), this two
Tapered wall is around first tapered wall and first group of guide vane (11) arrangement.
8. gas distributor according to claim 7, it is characterised in that third tapered wall (19), third tapered wall arrangement
Between first tapered wall (9) and second tapered wall (17), first group of guide vane (11) is arranged in first tapered wall
(9) between the third tapered wall (19), and it is characterized in that second group of guide vane (13), second group of guide vane arrangement
Between second tapered wall (17) and the third tapered wall (19).
9. gas distributor according to claim 7, it is characterised in that: access (20), the access is towards first taper
Space (22) between wall (9) and second tapered wall (17) extends；One group of inlet guide vane (21), this group of entrance directing vane
Piece is arranged in the access (20), and described group of inlet guide vane (21) includes multiple inlet guide vanes, and each entrance is led
The a part with the periphery in the leading edge direction (24) being in tilted layout relative to the vertical axis (3) is constituted to blade.
10. gas distributor according to claim 7, it is characterised in that access (20), the access is towards first taper
Space (22) between wall (9) and second tapered wall (17) extends, and the access (20) extends from volute road (23), the whirlpool
Shape road (23) is located between the access (20) and the admission line (15), and the volute road (23) includes the circumferential wall (5).
11. gas distributor according to claim 10, which is characterized in that the volute road (23), which provides, surrounds the vertical axes
At least part of converging passageway of line (3).
12. a kind of spray-drying installation, which is characterized in that the spray-drying installation includes spray dryer room, at least one mist
Change device and at least one gas distributor according to any one of claim 1 to 5.
13. spray-drying installation according to claim 12, which is characterized in that at least one atomizer is rotary-atomizing
Device (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201870283 | 2018-05-08 | ||
| DKPA201870283 | 2018-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209378469U true CN209378469U (en) | 2019-09-13 |
Family
ID=67868653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821006860.6U Active CN209378469U (en) | 2018-05-08 | 2018-06-27 | Gas distributor and spray-drying installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209378469U (en) |
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2018
- 2018-06-27 CN CN201821006860.6U patent/CN209378469U/en active Active
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