CN201094899Y - Superstructure of absorption tower body - Google Patents
Superstructure of absorption tower body Download PDFInfo
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- CN201094899Y CN201094899Y CNU2007200749472U CN200720074947U CN201094899Y CN 201094899 Y CN201094899 Y CN 201094899Y CN U2007200749472 U CNU2007200749472 U CN U2007200749472U CN 200720074947 U CN200720074947 U CN 200720074947U CN 201094899 Y CN201094899 Y CN 201094899Y
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- tower
- bending plate
- absorption tower
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- smoke bending
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Abstract
The utility model discloses an upper structure of an absorption tower. A baffle wall is arranged on the inner wall of the absorption tower and below a net smoke outlet. One side of the tower top that is opposite to the net smoke outlet is shaped like a slope. The sides of a connecting part between the net smoke outlet and the tower body have a gradually shrinking shape. The structure can reduce or eliminate vortexes, optimize the air distribution, effectively improve the effects of air distribution of smoke on the tower top and the tower outlet so as to reduce the system resistance, reduce the power consumption, and effectively improve the performance of downstream equipment (a demister or a smoke gas heat exchanger).
Description
Technical field
The utility model relates to a kind of technology of absorption tower, especially belongs to the superstructure of fume desulfurating absorption tower.
Background technology
The modal two kinds of export structures of present fume desulfurating absorption tower used in metallurgy: flat-tope structure, circular cone structure, but there is following shortcoming:
When flat-tope structure is adopted on the absorption tower (shown in accompanying drawing 1,2), wherein 1 ' is former smoke inlet, and 2 ' for absorbing tower body, and 3 ' is clean exhanst gas outlet, and (A district, B district, C district, D district, E district, F district) has the eddy current appearance at the chart display position.Constantly producing vortex in the vortex, its energy is from main flow, thereby constantly consumes the energy of main flow; Vortex region and near, current gradient on the flow section strengthens, and the main flow energy loss is increased to some extent.Eddy current by the process of constantly taking away and spreading in, aggravated the turbulent fluctuation in the downstream certain limit, should the zone and the energy loss in downstream thereby increased.Because energy loss increases, cause SR to increase, the power consumption of booster fan is increased.
The appearance of eddy current makes the air-flow skewness, influences the service behaviour of components downstream:
If what flue outlet was external is demister, will make the air-flow skewness that enters demister, cause the demist poor effect, thereby flue gas water content is increased, corrode follow-up flue, and the regional area flow velocity is higher on the demister flow section, and the resistance that has also increased demister work is decreased, and has accelerated the wearing and tearing of demister flap.Operation for demister is a kind of threat.
If demister is to be built in the tower, what flue outlet was external is the flue gas heat exchange device, because that air-flow distributes is inhomogeneous, makes in the heat exchanger coefficient of heat transfer inequality everywhere, has greatly influenced flue gas heat exchange efficient.And not only heat exchange is poor in the flow velocity lower in the GGH, and cigarette ash or slurry drops easily deposit; And flow velocity upper zone serious wear, the heat exchange element life-span is short.
When the absorption tower superstructure adopts circular cone structure (as accompanying drawing 3, shown in 4), wherein 1 " is former smoke inlet; 2 " for absorbing tower body; 3 " be clean exhanst gas outlet, this design and arrangement increase the absorption tower height, and correspondingly clean flue height and platform bearing height thereof also increase, thereby the consumption steel are more; Usually need add a large amount of reinforcement structures with the reinforcement rigidity at cat head in addition, thereby further increase weight of equipment, unfavorable to carrying; If in order to make air-flow even, install guide vane additional at upper space, then blade installation and maintenance in the space are relatively more difficult.
Summary of the invention
The purpose of this utility model provides a kind of absorption tower body superstructure, and this structure can reduce or eliminate the existence of eddy current, optimize air-flow and distribute, thereby improve effectively flue gas on tower top and the air-flow distribution effect of tower outlet reduce SR, reduce power consumption.
The purpose of this utility model is achieved in that a kind of absorption tower body superstructure, comprises clean exhanst gas outlet, and a smoke bending plate is installed in the below that is positioned at clean exhanst gas outlet on the inwall of described absorption tower.
Preferably, the side that described cat head is relative with clean exhanst gas outlet is ramped shaped.
Preferably, the angle γ of described slope and horizontal plane is 30 °～45 °, and its horizontal length b is 1/4 tower diameter～3/4 tower diameter.
Preferably, described clean exhanst gas outlet is located at the side of body of the tower, and with cat head on same horizontal plane.
Preferably, the connecting portion side direction of described clean exhanst gas outlet and body of the tower is the convergent shape.
Preferably, described connecting portion is 20 °～30 ° along the both sides of the horizontal cross-section of geometric center lines and the formed angle theta of tangent line and the ε of body of the tower.
Preferably, described smoke bending plate comprises a flap and a lower flap portion on one, and last flap is connected by a vertical plate with lower flap portion; The angle α scope of last flap and tower wall is 45 °～65 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
Preferably, described smoke bending plate comprises a upper curved plate and a lower flap portion, and upper curved plate is connected by a vertical plate with lower flap portion; The angle α scope of upper curved plate and tower wall is 70 °～90 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
Preferably, described smoke bending plate comprises a upper curved plate and a lower flap portion that is connected with upper curved plate; The angle α scope of upper curved plate and tower wall is 70 °～90 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
Preferably, described smoke bending plate comprises a flap and a lower flap portion that is connected with last flap on one, and the angle α scope of last flap and tower wall is 30 °～45 °, and the angular range β of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; And alpha+beta≤90 °; The width e of smoke bending plate≤1/4 tower diameter.
The utility model makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect:
(1) adopts lower resistance air-flow optimization type absorption tower superstructure, reduced the vortex, optimized air current composition, improved flue gas effectively on tower top and the air-flow distribution effect of tower outlet.
(2) because air current composition is optimized, the resistance that has reduced flue gas stream is decreased, thereby has reduced the booster fan power consumption.
(3) after the vortex zone reduced or disappears, it is minimum that flue gas horizontal and vertical air-flow skewness on the cross section reaches;
If A. flue outlet is the external demister, enforcement of the present utility model, can bring very big optimization to the performance of downstream demister, because air-flow is even, make and remove the fog effect increase, reduced the corrosion of rear portion flue, and demister is operated in the safe flow rates, helped the permanent operation of demister and keep high service behaviour.
If B. flue outlet is a heat exchanger, enforcement of the present utility model, the performance of meeting heat exchanging device is brought very big optimization, because air-flow is even, the heat exchange effect is increased, and helps heat exchanger and keeps high service behaviour.
(4) can make the export structure of flue and supporting construction obtain effective simplification, thereby reduce tower height, save rolled steel dosage.
Description of drawings
Fig. 1 is a kind of absorption tower body superstructure schematic diagram of prior art;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the absorption tower body superstructure schematic diagram of another kind of prior art;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is an absorption tower body superstructure schematic diagram of the present utility model;
Fig. 6 is the vertical view of Fig. 5;
Fig. 7 is the schematic diagram of first embodiment of smoke bending plate of the present utility model;
Fig. 8 is the schematic diagram of second embodiment of smoke bending plate of the present utility model;
Fig. 9 is the schematic diagram of the 3rd embodiment of smoke bending plate of the present utility model;
Figure 10 is the schematic diagram of the 4th embodiment of smoke bending plate of the present utility model.
The specific embodiment
As Fig. 5, shown in 6, wherein 1 is former gas approach, and 2 is smoke bending plate, and 3 is clean exhanst gas outlet, and 4 are the top, slope, and 5 for absorbing tower body.Clean exhanst gas outlet 3 is located at the side that absorbs tower body, and the cat head on its upper wall surface and absorption tower is on same horizontal plane.
Change cat head into top, slope 4, the size of the gradient is chosen by numerical simulation optimization, its angle γ scope: 30 °～45 °; Horizontal length b scope: 1/4 tower diameter～3/4 tower diameter.The setting of ramp type top structure greatly reduces the vortex in A district, and the flow of flue gas resistance is decreased and reduced.Make clean exhanst gas outlet 3 and cat head on same level, reduce the vortex in B district and C district.Be positioned on the inwall of absorption tower clean exhanst gas outlet 3 below a smoke bending plate 2 is set, smoke bending plate 2 horizontal section configurations can be trapezoidal, circular arc type or triangle, the perhaps combination of several shapes, its vertical section is fan-shaped as shown in Figure 6, fan-shaped circumference covers the width of clean exhanst gas outlet 3, the smoke bending plate size becomes with the tower diameter, choose by numerical simulation calculation optimization: wherein α is the last flap (or upper curved plate) of smoke bending plate and the angle of tower wall, β is the angle of lower flap portion and tower wall, k is the height of smoke bending plate, and e is the width of smoke bending plate.
As shown in Figure 7, the angle α scope of smoke bending plate: 45 °～65 °; Angle β scope: 30 °～45 °; K≤2m; E≤1/4 tower diameter;
As shown in Figure 8, the angle α scope of smoke bending plate: 70 °～90 °; Angle β scope: 30 °～45 °; K≤2m; E≤1/4 tower diameter;
As shown in Figure 9, the angle α scope of smoke bending plate: 70 °～90 °; Angle β scope: 30 °～45 °; K≤2m; E≤1/4 tower diameter;
As shown in figure 10, the angle α scope of smoke bending plate: 30 °～45 °; Angle β scope: 30 °～45 °; K≤2m; Alpha+beta＜90 °; E≤1/4 tower diameter.
Adopt smoke bending plate can make flue gas flow out the absorption tower smoothly, reduced the vortex in D district.
As shown in Figure 6, clean exhanst gas outlet 3 adopts gradual shrinkage structure, its angle theta and ε equal and opposite in direction, scope: 20 °～30 ° with the side direction of junction, absorption tower; The vortex in E district and F district is also reduced or disappear.
Embodiment 1: certain handles exhaust gas volumn is 900000m
3The sintered flue gas desulfurization device of/h, flue-gas temperature are 110 ~ 150 ℃, wherein SO
2Concentration is 200～600mg/Nm
3, HF concentration is 20～100mg/Nm
3, HCl concentration is 60～180mg/Nm
3, dust concentration is 80～300mg/Nm
3The JBR type desulfurizing tower of independent development is adopted on the absorption tower, absorption tower diameter 15m, and slurries face height is 4.5m.Absorbent adopts 250 order agstones, makes the absorbent slurry of 15%wt, and system moves continuously.Flat-roof structure is adopted on former absorption tower, and former flue gas enters in the absorption tower slurries in each root air jet pipe and slurries pond and reacts and slough SO after supercooling
2After, clean flue gas is discharged from the flat roof type outlet, and demister is placed on outside the outlet of absorption tower.Modification scheme: change the superstructure of original flat roof type into structure of the present utility model, top, slope elevation angle gamma is 45 °, and the slope level is 4m to length b; Adopt smoke bending plate as shown in Figure 7: angle α=60 °; Angle β=45 °; K=1.8m; E=1.8m; The side direction employing gradual shrinkage structure of clean exhanst gas outlet and junction, absorption tower, its angle theta=ε=25 °.After the transformation, the resistance of the whole system 180Pa that descended removes fog effect and improves after testing, through the droplet content after the demist by 75mg/Nm
3Be reduced to 60mg/Nm
3
Embodiment 2: certain handles exhaust gas volumn is 900000m
3The sintered flue gas desulfurization device of/h, flue-gas temperature are 110 ~ 150 ℃, wherein SO
2Concentration is 200～600mg/Nm
3, HF concentration is 20～100mg/Nm
3, HCl concentration is 60～180mg/Nm
3, dust concentration is 80～300mg/Nm
3The JBR type desulfurizing tower of independent development is adopted on the absorption tower, absorption tower diameter 15m, and slurries face height is 4.5m.Absorbent adopts 250 order agstones, makes the absorbent slurry of 15%wt, and system moves continuously.Flat-roof structure is adopted on former absorption tower, and former flue gas enters in the absorption tower slurries in each root air jet pipe and slurries pond and reacts and slough SO after supercooling
2After, clean flue gas is discharged from the flat roof type outlet, and demister is placed on outside the outlet of absorption tower.Modification scheme: change the superstructure of original flat roof type into structure of the present utility model, top, slope elevation angle gamma is 45 °, and the slope level is 4m to length b; Adopt smoke bending plate as shown in Figure 8: angle α=70 °; Angle β=45 °; K=1.8m; E=1.8m; The side direction employing gradual shrinkage structure of clean exhanst gas outlet and junction, absorption tower, its angle theta=ε=25 °.After the transformation, the resistance of the whole system 200Pa that descended removes fog effect and improves after testing, through the droplet content after the demist by 75mg/Nm
3Be reduced to 55mg/Nm
3
Embodiment 3: the small-sized sintering unit of certain 2 200MW adopts flue gas desulfur device, i.e. 2 stoves, one tower, and the flue gas total flow is 1500000Nm
3/ h, flue-gas temperature is 130 ~ 140 ℃, wherein SO
2Concentration is 2000～2500mg/Nm
3, HF concentration is 10～30mg/Nm
3, HCl concentration is 20～60mg/Nm
3, dust concentration is 100～150mg/Nm
3Bubble tower is adopted on the absorption tower, absorption tower diameter 20m, and slurries face height is 5m.Absorbent adopts 325 order agstones, makes the absorbent slurry of 15%wt, and system moves continuously.Flat-roof structure is adopted on former absorption tower, and former flue gas enters in the absorption tower slurries in each root air jet pipe and slurries pond and reacts and slough SO after supercooling
2After, clean flue gas is discharged from the flat roof type outlet, and demister is placed on outside the outlet of absorption tower.Modification scheme: change the superstructure of original flat roof type into structure of the present utility model, top, slope elevation angle gamma is 30 °, and the slope level is 6.9m to length b; Adopt smoke bending plate as shown in Figure 9: angle α=75 °; Angle β=30 °; K=2m; The side direction employing gradual shrinkage structure of clean exhanst gas outlet and junction, absorption tower, its angle theta=ε=25 °.After the transformation, the resistance of the whole system 150Pa that descended removes fog effect and improves after testing, through the droplet content after the demist by 75mg/Nm
3Be reduced to 65mg/Nm
3
Embodiment 4: certain 600MW sintering unit adopts flue gas desulfur device, and the flue gas total flow is 2400000Nm
3/ h, flue-gas temperature is 130 ~ 145 ℃, wherein SO
2Concentration is 2500～2800mg/Nm
3, HF concentration is 15～35mg/Nm
3, HCl concentration is 10～50mg/Nm
3, dust concentration is 100～200mg/Nm
3Bubble tower is adopted on the absorption tower, absorption tower diameter 24.5m, and slurries face height is 5.5m.Absorbent adopts 325 order agstones, makes the absorbent slurry of 15%wt, and system moves continuously.Flat-roof structure is adopted on former absorption tower, and former flue gas enters in the absorption tower slurries in each root air jet pipe and slurries pond and reacts and slough SO after supercooling
2After, clean flue gas is discharged from the flat roof type outlet, and demister is placed on outside the outlet of absorption tower.Modification scheme: change the superstructure of original flat roof type into structure of the present utility model, top, slope elevation angle gamma is 30 °, and the slope level is 8.5m to length b; Adopt triangle smoke bending plate as shown in figure 10: angle α=45 °; Angle β=30 °; K=2m; The side direction employing gradual shrinkage structure of clean exhanst gas outlet and junction, absorption tower, its angle theta=ε=25 °.After the transformation, the resistance of the whole system 170Pa that descended removes fog effect and improves after testing, through the droplet content after the demist by 75mg/Nm
3Be reduced to 60mg/Nm
3
Claims (10)
1. one kind absorbs the tower body superstructure, comprises clean exhanst gas outlet, and it is characterized in that: a smoke bending plate is installed in the below that is positioned at clean exhanst gas outlet on the inwall of described absorption tower.
2. absorption tower body superstructure as claimed in claim 2 is characterized in that: the side that described cat head is relative with clean exhanst gas outlet is ramped shaped.
3. absorption tower body superstructure as claimed in claim 3 is characterized in that: the angle γ of described slope and horizontal plane is 30 °～45 °, and its horizontal length b is 1/4 tower diameter～3/4 tower diameter.
4. as claim 2 or 3 described absorption tower body superstructures, it is characterized in that: described clean exhanst gas outlet is located at the side of body of the tower, and with cat head on same horizontal plane.
5. absorption tower body superstructure as claimed in claim 4 is characterized in that: the connecting portion side direction of described clean exhanst gas outlet and body of the tower is the convergent shape.
6. absorption tower body superstructure as claimed in claim 5 is characterized in that: described connecting portion is 20 °～30 ° along the both sides of the horizontal cross-section of geometric center lines and the formed angle theta of tangent line and the ε of body of the tower.
7. as claim 5 or 6 described absorption tower body superstructures, it is characterized in that: described smoke bending plate comprises a flap and a lower flap portion on one, and last flap is connected by a vertical plate with lower flap portion; The angle α scope of last flap and tower wall is 45 °～65 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
8. as claim 5 or 6 described absorption tower body superstructures, it is characterized in that: described smoke bending plate comprises a upper curved plate and a lower flap portion, and upper curved plate is connected by a vertical plate with lower flap portion; The angle α scope of upper curved plate and tower wall is 70 °～90 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
9. as claim 5 or 6 described absorption tower body superstructures, it is characterized in that: described smoke bending plate comprises a upper curved plate and a lower flap portion that is connected with upper curved plate; The angle α scope of upper curved plate and tower wall is 70 °～90 °, and the angle β scope of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; The width e of smoke bending plate≤1/4 tower diameter.
10. as claim 5 or 6 described absorption tower body superstructures, it is characterized in that: described smoke bending plate comprises a flap and a lower flap portion that is connected with last flap on one, the angle α scope of last flap and tower wall is 30 °～45 °, the angular range β of lower flap portion and tower wall is 30 °～45 °, the height k≤2m of smoke bending plate; And alpha+beta≤90 °; The width e of smoke bending plate≤1/4 tower diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200749472U CN201094899Y (en) | 2007-09-24 | 2007-09-24 | Superstructure of absorption tower body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200749472U CN201094899Y (en) | 2007-09-24 | 2007-09-24 | Superstructure of absorption tower body |
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| Publication Number | Publication Date |
|---|---|
| CN201094899Y true CN201094899Y (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200749472U Expired - Lifetime CN201094899Y (en) | 2007-09-24 | 2007-09-24 | Superstructure of absorption tower body |
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| CN (1) | CN201094899Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779026A (en) * | 2019-11-08 | 2020-02-11 | 哈尔滨锅炉厂有限责任公司 | Rubbish exhaust-heat boiler optimizes flue gas flow field structure |
-
2007
- 2007-09-24 CN CNU2007200749472U patent/CN201094899Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779026A (en) * | 2019-11-08 | 2020-02-11 | 哈尔滨锅炉厂有限责任公司 | Rubbish exhaust-heat boiler optimizes flue gas flow field structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080806 |