CN201001994Y - Wave shaped baffle type defroster - Google Patents
Wave shaped baffle type defroster Download PDFInfo
- Publication number
- CN201001994Y CN201001994Y CNU2006201652075U CN200620165207U CN201001994Y CN 201001994 Y CN201001994 Y CN 201001994Y CN U2006201652075 U CNU2006201652075 U CN U2006201652075U CN 200620165207 U CN200620165207 U CN 200620165207U CN 201001994 Y CN201001994 Y CN 201001994Y
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- Prior art keywords
- demister
- assembly
- flue gas
- demister assembly
- order
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 63
- 239000003546 flue gas Substances 0.000 claims description 63
- 238000011144 upstream manufacturing Methods 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 17
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 239000003595 mist Substances 0.000 claims description 13
- 238000005406 washing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- Separating Particles In Gases By Inertia (AREA)
Abstract
The utility model discloses a defogger, comprising the first class defogger (1), the second class defogger (2), the supporting beam (3) that supports the two-class defoggers, and the washing water system. The first class defogger (1) and the second class defogger (2) respectively consist of the adjacent display in rows of a plurality of first class defogger members (11) and second class defogger members (21) which have V-shaped profiles. The central line (41) of the first class defogger members (11) is in the same direction with the flume speed of the upper course of the first class defogger members; the central line (42) of the second class defogger members (21) is in the same direction with the flume speed of the lower course of the second class defogger members. The utility model can make the flows of flume in the paths of the defogger leaves on both sides of the V-shaped defogger members equal to each other, avoiding the problems of second-time entrainment or low capability of defogging. The defogging capability of the defogger is effectively improved.
Description
Technical field
The utility model relates to a kind of demister that is used for divided gas flow drop and tiny solid particle, especially a kind of Wave baffle type mist eliminator.
Background technology
Demister is used for separating residual drop and/or the particle through the washed flue gas in absorption tower, is installed in the top on absorption tower usually, sets gradually the two-stage demister along the direction of flow of flue gas, and every grade of demister is made up of several demister assemblies.The common at present Wave baffle type mist eliminator that adopts, each demister assembly is made up of some demister blades with wavy curve shape, keep certain spacing between the demister blade, interlobate passage has constituted the effective coverage of demist, when the flue gas that contains drop and/or particle enters the interlobate passage of demister, because the deviation of streamline is realized gas-liquid separation under the effect of inertia force, the part drop impinges upon on the demister blade and is captured down.There is the problem of a critical speed in this Wave baffle type mist eliminator, promptly easily produces the reentrainment of droplet when too high (surpassing critical gas velocity) when flue gas flow rate, and pressure drop is increased, the energy consumption increase.Though flue gas flow rate is crossed and lowly can not produced reentrainment, the demist ability is relatively poor.Therefore must be controlled at flue gas flow rate in the OK range except that fog effect for reaching preferably.
Result of study shows that reentrainment is controlled by a space reentrainment criterion numeral, promptly
, as seen, for specific treatment media, reentrainment criterion numeral and superficial velocity U
gBiquadratic proportional, R
nBe higher than certain critical value, reentrainment will take place, for the demister blade of given shape, single demister unit the flue gas flow that reentrainment does not take place of the maximum that can pass through be certain.
For the absorption tower of especially flue gas desulfurization industry of flue gas process field, mostly reach the large cylinder-shaped container of more than 30 meter of tens of meters height for diameter, velocity of flue gas and the direction diverse location in the cross section has very big difference.Yet existing demister design all adopts each demister unit to design according to the average discharge of homogeneous, does not consider through-flow exhaust gas volumn of each demister and situation inequality in the actual motion.
For the demister unit of V-arrangement or inverted V-shaped, when the actual flow direction of flue gas departs from the center line of demister, the through-flow exhaust gas volumn difference of demister blade path that just can cause two sides of V-arrangement demister unit, cause the reentrainment of a side excessive, and opposite side demist ability is relatively poor, thereby the overall performance of demister is relatively poor.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of Wave baffle type mist eliminator, when adopting this demister, the through-flow exhaust gas volumn of demister blade path of two sides of V-arrangement demister assembly is equated, avoid occurring phenomenons such as reentrainment or demist ability be relatively poor, improve the demist ability of demister.
For solving the problems of the technologies described above, demister of the present utility model comprises the first order demister that is arranged in the absorption tower 100, second level demister, support the brace summer and the flushing water system of this two-stage demister, first order demister and second level demister are made up of first order demister assembly and second level demister assembly adjacent layout in a row that the section of some is similar V-arrangement respectively, wherein the center line of first order demister assembly is consistent with the velocity of flue gas direction of this demister assembly upstream, and the center line of second level demister assembly is consistent with the velocity of flue gas direction in this demister assembly downstream.
Near the center line 41 of described first order demister assembly 11 100 axis, absorption tower and the center line 42 of second level demister assembly 21 coincide with the center line on absorption tower 100 respectively, described coincidence can overlap with the center line on absorption tower 100 is actual mutually respectively for the center line 42 of the center line 41 of first order demister assembly 11 and second level demister assembly 21, also can coincide with the center line on absorption tower 100 after by translation for the center line 42 of the center line 41 of first order demister assembly 11 and second level demister assembly 21, the center line 42 that is the center line 41 of first order demister assembly 11 and second level demister assembly 21 is consistent with the centerline direction on absorption tower 100, near the center line 41 of the first order demister assembly 11 the 100 tower walls of absorption tower and the center line 42 of second level demister assembly 21) respectively with the center line on absorption tower 100 intersecting at an angle.
By changing the placement location of demister assembly, adjust the direction of first and second grades of demister assembly center lines, make the center line of first order demister consistent with the velocity of flue gas direction of this demister assembly upstream, the center line of second level demister assembly is consistent with the velocity of flue gas direction in this demister assembly downstream, the placement direction that is the demister assembly is respectively with the incoming flow of flue gas with go flow path direction to coordinate mutually, such design makes the flue gas treating capacity of two sides of each V-arrangement assembly of first order demister equate, avoid causing a side of assembly to cause serious reentrainment owing to through flow velocity between blade is excessive, opposite side then causes the relatively poor situation of demist ability to take place owing to through flow velocity between blade is too small, improve the whole structure of demister; For the demister of the second level, because the centerline direction of its assembly is consistent with the direction that flue gas flows out, this grade demister plays a part the part water conservancy diversion when satisfying defrosting function, the drop that backflow that the downstream appearance of minimizing demister blade causes because of outer boundary retrains and vortex cause is carried phenomenon by secondary, improve demist efficient, reduced the pressure drop of flue gas simultaneously through demister.
Relative spread pattern for first order demister assembly and second level demister assembly can be diversified, and promptly the section of two-stage demister assembly can be arranged relative to each other, also can be to arrange in the same manner mutually.Concrete, typical arrangement form can have following four kinds, and promptly the section V-arrangement opening of first order demister assembly is carried the direction of flue gas incoming flow, and the section V-arrangement opening of second level demister assembly is in face of the direction of flue gas incoming flow; The section V-arrangement opening of first order demister assembly is in face of the direction of flue gas incoming flow, and the section V-arrangement opening of second level demister assembly is carried the direction of flue gas incoming flow; The section V-arrangement opening of first order demister assembly and second level demister assembly is all carried the direction of flue gas incoming flow; The section V-arrangement opening of first order demister assembly and second level demister assembly is all in face of the direction of flue gas incoming flow.
The supporting construction of first and second grades of demister assemblies can adopt the unified brace summer of considering, also can adopt separately the brace summer of design respectively.
In order to improve except that fog effect, and prevent that solid particulate matter from stopping up the interlobate passage of demister, demister designs at different levels have rinse water arrangement, promptly in the upstream and downstream of first order demister and the second level demister wash tub pipe is set respectively and washes, said here upstream and downstream only represents flue gas for demister position at different levels.Rinse water arrangement is made up of some groups of wash tub pipes, and the nozzle of some is set on every wash tub pipe, and each nozzle is provided with certain flow and coverage, to guarantee the having flushing water of some to cover in each zone on demister surface.
The supporting construction of flushing water can be considered together with the supporting construction of demister assembly, and independent demister flushing water supporting construction also can be set.
In order to reach the technique effect of above-mentioned demister, promptly according to the arrangement form of the V-shaped demister assembly of the different designs section of velocity attitude everywhere of lateral cross section in the reactor, the center line of each demister assembly of first order demister is consistent with the velocity of flue gas direction of this demister assembly upstream, and the center line of each demister assembly of second level demister is consistent with the velocity of flue gas direction in this demister assembly downstream; Can adopt following concrete steps:
Step 1: at first the method for employing experiment and numerical computations is determined the VELOCITY DISTRIBUTION situation in demister upstream and downstream cross section under void tower (promptly only the not placing demister) condition;
Step 2: the cross section is divided into several control areas according to the span of brace summer, VELOCITY DISTRIBUTION in each control area is carried out statistical analysis, obtain its average velocity attitude and size, thus the velocity magnitude and the direction that draw the incoming flow of demister upstream and downstream respectively and go to flow;
Step 3: according to the velocity attitude that above-mentioned steps 2 is determined, tentatively determine the placement direction of demister assembly, simultaneously in conjunction with the effect of handling object and requirement, calculate the demist area, thereby determine the layout of demister;
Step 4: arrange according to the demister that above-mentioned steps 3 is determined, the flow field 4 in the reactor behind the placement demister is analyzed, draw the VELOCITY DISTRIBUTION situation in demister upstream and downstream cross section, calculate the through-flow exhaust gas volumn of each V-arrangement demister dual-side;
Step 5: till circulation repetition above-mentioned steps 2,3 and the 4 through-flow exhaust gas volumns until V-arrangement demister dual-side equate.
Description of drawings
Fig. 1 is the vertical cross section partial enlarged drawing that adopts two-stage demister structure according to prior art.
Fig. 2 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of first embodiment of the present utility model.
Fig. 3 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of second embodiment of the present utility model.
Fig. 4 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of the 3rd embodiment of the present utility model.
Fig. 5 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of the 4th embodiment of the present utility model.
Fig. 6 is the vertical cross section partial enlarged drawing according to the reactor head of having placed the two-stage demister under certain flue gas condition of this practical firewood type first embodiment.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the vertical cross section partial enlarged drawing that adopts two-stage demister structure according to prior art, for simplicity, one of them complete demister system unit only is shown, comprise first order demister 1 and second level demister 2, every grade of demister 1 or 2 is made up of first order demister assembly 11 and second level demister assembly 21 adjacent layouts in a row that the section of some is similar V-arrangement respectively, first order demister assembly 11 and second level demister assembly 21 shared supporting constructions 3, the upstream and downstream of first and second grades of demisters is furnished with corresponding flushing water system separately, the flushing water system of one secondary demister is respectively by some groups of wash tub pipes 14,24 form, every wash tub pipe 14, the nozzle of some is set on 24, each nozzle is provided with certain flow and coverage, to guarantee the having flushing water of some to cover in each zone on demister surface.Wash tub pipe adopts cutting ferrule 13,23 fixing, and is connected with flushing water brace summer 12,22, and flushing water brace summer 12,22 is fixed on the brace summer 3 of demister.The center line 42 of the center line 41 of first order demister assembly 11, second level demister assembly 21 and the center line 40 of whole demister unit overlap mutually.
When such design departs from the center line 40 of demister when the actual flow direction of flue gas, the through-flow exhaust gas volumn difference of demister blade path that just can cause two sides of V-arrangement demister unit, it is the interior through-flow exhaust gas volumn difference of demister blade of the center line both sides of first order demister 1 demister assembly 11, one side exhaust gas volumn is excessive and a side exhaust gas volumn is too small, cause the reentrainment of a side excessive, and opposite side demist ability is relatively poor, thereby the overall performance of demister is relatively poor.
Fig. 2 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of first embodiment of the present utility model.For simplicity, one of them complete demister system unit only is shown, comprise first order demister 1 and second level demister 2, every grade of demister 1 or 2 is made up of first order demister assembly 11 and second level demister assembly 21 adjacent layouts in a row that the section of some is similar V-arrangement respectively, first order demister assembly 11 and second level demister assembly 21 shared supporting constructions 3, the upstream and downstream of first and second grades of demisters is furnished with corresponding flushing water system separately, the flushing water system of one secondary demister is respectively by some groups of wash tub pipes 14,24 form, every wash tub pipe 14, the nozzle of some is set on 24, each nozzle is provided with certain flow and coverage, to guarantee the having flushing water of some to cover in each zone on demister surface.Wash tub pipe adopts cutting ferrule 13,23 fixing, and is connected with flushing water brace summer 12,22, and wash water brace summer 12,22 is fixed on the brace summer 3 of demister.Wherein the center line 41 of first order demister assembly 11 is consistent with the velocity of flue gas direction of this demister assembly upstream, and the center line 42 of second level demister assembly 21 is consistent with the velocity of flue gas direction in this demister assembly downstream.
Because the center line 41 of first order demister assembly 11 is consistent with the velocity of flue gas direction of this demister assembly upstream, the center line 42 of second level demister assembly 21 is consistent with the velocity of flue gas direction in this demister assembly downstream, the placement direction that is the demister assembly is respectively with the incoming flow of flue gas with go flow path direction to coordinate mutually, such design makes the flue gas treating capacity of two sides of first order demister 1 each V-arrangement assembly equate, avoid causing a side of assembly to cause serious reentrainment owing to through flow velocity between blade is excessive, opposite side then causes the relatively poor situation of demist ability to take place owing to through flow velocity between blade is too small, improve the whole structure of demister; For second level demister 2, because the centerline direction of its assembly is consistent with the direction that flue gas flows out, this grade demister plays a part the part water conservancy diversion when satisfying defrosting function, the drop that backflow that the downstream appearance of minimizing demister blade causes because of outer boundary retrains and vortex cause is carried phenomenon by secondary, improve demist efficient, reduced the pressure drop of flue gas simultaneously through demister.
Relative spread pattern for first order demister assembly and second level demister assembly can be diversified, and promptly the section of two-stage demister assembly can be arranged relative to each other, also can be to arrange in the same manner mutually.Concrete, typical arrangement form can have following four kinds, Fig. 1 has provided first embodiment of the present utility model, and promptly the section V-arrangement opening of first order demister assembly 11 is carried the direction of flue gas incoming flow, and the section V-arrangement opening of second level demister assembly 21 is in face of the direction of flue gas incoming flow; Fig. 3,4 and 5 has provided other several arrangement forms respectively.
Fig. 3 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of second embodiment of the present utility model.The characteristics of this layout are the direction of the section V-arrangement opening of first order demister assembly 11 in face of the flue gas incoming flow, and the section V-arrangement opening of second level demister assembly 21 is carried the direction of flue gas incoming flow.
Fig. 4 has then provided the vertical cross section partial enlarged drawing of the employing two-stage demister structure of the 3rd embodiment of the present utility model.The characteristics of this layout are the directions that the section V-arrangement opening of first order demister assembly 11 and second level demister assembly 21 is all carried the flue gas incoming flow.
Fig. 5 is the vertical cross section partial enlarged drawing of the employing two-stage demister structure of the 4th embodiment of the present utility model.The characteristics of this layout are that the section V-arrangement opening of first order demister assembly 11 and second level demister assembly 21 is all in face of the direction of flue gas incoming flow.
The supporting construction of first order demister 1 and second level demister 2 can adopt the unified brace summer of considering 3, also can adopt separately the brace summer of design respectively.The supporting construction 12,22 of flushing water can be considered together with the brace summer 3 of demister assembly, independent demister flushing water supporting construction also can be set.This kind conversion all drops on protection domain of the present utility model.
In order to reach the technique effect of above-mentioned demister, promptly according to the arrangement form of the V-shaped demister assembly of the different designs section of velocity attitude everywhere of lateral cross section in the reactor, the center line 41 of each demister assembly 11 of first order demister 1 is consistent with the velocity of flue gas direction of these demister assembly 11 upstreams, and the center line 42 of each demister assembly 21 of second level demister 2 is consistent with the velocity of flue gas direction in these demister assembly 21 downstreams; Can adopt following concrete steps:
Step 1: at first the method for employing experiment and numerical computations is determined the VELOCITY DISTRIBUTION situation in demister upstream and downstream cross section under void tower (promptly only the not placing demister) condition;
Step 2: the cross section is divided into several control areas according to the span of brace summer, VELOCITY DISTRIBUTION in each control area is carried out statistical analysis, obtain its average velocity attitude and size, thus the velocity magnitude and the direction that draw the incoming flow of demister upstream and downstream respectively and go to flow;
Step 3: according to the velocity attitude that above-mentioned steps 2 is determined, tentatively determine the placement direction of demister assembly, simultaneously in conjunction with the effect of handling object and requirement, calculate the demist area, thereby determine the layout of demister;
Step 4: arrange according to the demister that above-mentioned steps 3 is determined, the flow field 4 in the reactor behind the placement demister is analyzed, draw the VELOCITY DISTRIBUTION situation in demister upstream and downstream cross section, calculate the through-flow exhaust gas volumn of each V-arrangement demister dual-side;
Step 5: till circulation repetition above-mentioned steps 2,3 and the 4 through-flow exhaust gas volumns until V-arrangement demister dual-side equate.
Fig. 6 is the vertical cross section partial enlarged drawing according to the reactor head of having placed the two-stage demister under certain flue gas condition of the utility model first embodiment.The top of (reactor) is provided with first order demister 1 and second level demister 2 on the absorption tower, the arrow of demister upstream and downstream is represented the flue gas direction supposed, its direction is carried out zone division and homogenizing according to numerical computations and experiment test result according to the position of brace summer, the direction direction of the demister assembly center line of each corresponding region is respectively with the incoming flow of flue gas with go flow path direction consistent, the center line 41 that is first order demister assembly 11 is consistent with the velocity of flue gas direction of this demister assembly upstream, and the center line 42 of second level demister assembly 21 is consistent with the velocity of flue gas direction in this demister assembly downstream.Such design makes the flue gas treating capacity of two sides of first order demister 1 each V-arrangement assembly equate, improves the whole structure of demister; Second level demister 2 plays a part the part water conservancy diversion when satisfying defrosting function, the drop that backflow that the downstream appearance of minimizing demister blade causes because of outer boundary retrains and vortex cause is carried phenomenon by secondary, improve demist efficient, reduced the pressure drop of flue gas simultaneously through demister.
The utility model is not limited to the above-mentioned specific embodiment, as long as the center line 41 of first order demister group 11 is consistent with the velocity of flue gas direction of this demister assembly upstream, and center line 42 and this demister assembly of second level demister assembly 21
The downstream
Velocity of flue gas direction unanimity, no matter which kind of form demister assembly 11,21 and flushing water adopt support,, all drop on protection domain of the present utility model no matter also how many levels demister adopts.
Claims (8)
1, a kind of Wave baffle type mist eliminator, comprise the first order demister (1) that is arranged in the absorption tower (100), second level demister (2), support the brace summer (3) and the flushing water system of this two-stage demister, first order demister (1) and second level demister (2) are made up of first order demister assembly (11) and second level demister assembly (21) adjacent layout in a row that the section of some is similar V-arrangement respectively, it is characterized in that: the center line (41) of described first order demister assembly (11) is consistent with the velocity of flue gas direction of this demister assembly upstream, and the center line (42) of second level demister assembly (21) is consistent with the velocity of flue gas direction in this demister assembly downstream.
2, according to the described Wave baffle type mist eliminator of claim 1, it is characterized in that: near the center line (41) of described first order demister assembly (11) axis, absorption tower (100) and the center line (42) of second level demister assembly (21) coincide with the center line of absorption tower (100) respectively, near the center line (41) of the first order demister assembly (11) the tower wall of absorption tower (100) and the center line (42) of second level demister assembly (21) respectively with the center line of absorption tower (100) intersecting at an angle.
3, according to claim 1 or 2 described Wave baffle type mist eliminators, it is characterized in that: the section of described first order demister assembly (11) and second level demister assembly (21) is arranged relative to each other.
4, according to claim 1 or 2 described Wave baffle type mist eliminators, it is characterized in that: the section of described first order demister assembly (11) and second level demister assembly (21) is arranged mutually in the same manner.
5, according to the described Wave baffle type mist eliminator of claim 3, it is characterized in that: the section V-arrangement opening of described first order demister assembly (11) is carried the direction of flue gas incoming flow, and the section V-arrangement opening of second level demister assembly (21) is in face of the direction of flue gas incoming flow.
6, according to the described Wave baffle type mist eliminator of claim 4, it is characterized in that: the section V-arrangement opening of described first order demister assembly (11) is in face of the direction of flue gas incoming flow, and the section V-arrangement opening of second level demister assembly (21) is carried the direction of flue gas incoming flow.
7, according to claim 1,2 or 5 described Wave baffle type mist eliminators, it is characterized in that: the section V-arrangement opening of described first order demister assembly (11) and second level demister assembly (21) is all carried the direction of flue gas incoming flow.
8, according to claim 1,2 or 5 described Wave baffle type mist eliminators, it is characterized in that: the section V-arrangement opening of described first order demister assembly (11) and second level demister assembly (21) is all in face of the direction of flue gas incoming flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201652075U CN201001994Y (en) | 2006-12-21 | 2006-12-21 | Wave shaped baffle type defroster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201652075U CN201001994Y (en) | 2006-12-21 | 2006-12-21 | Wave shaped baffle type defroster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201001994Y true CN201001994Y (en) | 2008-01-09 |
Family
ID=39037537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201652075U Expired - Fee Related CN201001994Y (en) | 2006-12-21 | 2006-12-21 | Wave shaped baffle type defroster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201001994Y (en) |
-
2006
- 2006-12-21 CN CNU2006201652075U patent/CN201001994Y/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |