CN204233971U - A kind of flue gas desulfurization demister airflow uniform distribution assembly - Google Patents
A kind of flue gas desulfurization demister airflow uniform distribution assembly Download PDFInfo
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- CN204233971U CN204233971U CN201420644967.9U CN201420644967U CN204233971U CN 204233971 U CN204233971 U CN 204233971U CN 201420644967 U CN201420644967 U CN 201420644967U CN 204233971 U CN204233971 U CN 204233971U
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- uniform distribution
- airflow uniform
- flue gas
- gusset
- airflow
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- 238000009827 uniform distribution Methods 0.000 title claims abstract description 155
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000003546 flue gas Substances 0.000 title claims abstract description 69
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 20
- 230000023556 desulfurization Effects 0.000 title claims abstract description 20
- 239000011148 porous material Substances 0.000 claims description 9
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 16
- 239000003517 fume Substances 0.000 abstract description 7
- 239000007787 solid Substances 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 6
- 239000003595 mist Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a kind of flue gas desulfurization demister airflow uniform distribution assembly, comprise board-like airflow uniform distribution unit and the uniform unit of tube-sheet type.Structure of the present utility model effectively can regulate the velocity flow profile of flue gas in absorption tower, make by the flue gas flow rate of demister section more even, fully improve the demisting efficiency of demister, finally reduce units consumption, reduce the dust content of fume emission, there is the significance of energy-saving and emission-reduction.Under same flue gas flow condition, use the utility model effectively can improve the demisting efficiency of mist separator of desulfurization, reduce solid dust and the droplet content of absorption tower outlet further, discharge clean flue gas.
Description
Technical field
The utility model relates to environmental technology field, relates to a kind of flue gas desulfurization demister airflow uniform distribution assembly particularly, is mainly used in wet method fume desulfurizing system.
Background technology
In wet method fume desulfurizing system, flue gas in desulfurizing tower, after spraying layer fully contacts with absorbent slurry, the SO in flue gas
2absorbed by slurries and remove, fraction slurries is under the effect of air-flow simultaneously, upwards flows with flue gas with the form of droplet, and after demister removes, clean flue gas is exported by absorption tower and discharges.Because the velocity flow profile of flue gas in absorption tower is extremely uneven, when local flue gas flow rate is higher, flue gas carries drop amount will be aggravated; Meanwhile, too high flue gas flow rate also can make demister demisting efficiency reduce, and causes demister to lose efficacy or blocking.Demister lost efficacy or after blocking, adsorption tower smoke resistance will be caused obviously to increase, and units consumption strengthens; Simultaneously, not by droplet that demister effectively removes, can with flue gas through absorption tower outlet discharge, heat exchanger behind absorption tower or flue surfaces form gypsum dirt, descend slowly and lightly after even being discharged by chimney breast at periphery, formed " gypsum rain ", the solid dust pollutant load in fume emission process is significantly raised.
Utility model content
Utility model object: for overcoming the deficiencies in the prior art, this use is novel provides a kind of flue gas desulfurization demister airflow uniform distribution assembly, effectively can solve the problems such as the blocking of absorption tower demisting device, heat exchanger or flue surfaces gyrpseous scale, gypsum rain, meanwhile, the solid dust pollutant load in fume emission process can be reduced.
Technical scheme: for achieving the above object, the utility model provides a kind of flue gas desulfurization demister airflow uniform distribution assembly, comprises board-like airflow uniform distribution unit and the uniform unit of tube-sheet type, wherein,
Described board-like airflow uniform distribution unit comprises the first gusset and the first airflow uniform distribution plate, described first gusset surface offers the first plate hole, described first airflow uniform distribution plate is arranged between described first gusset with identical level height, is threaded connection fixing between described first airflow uniform distribution plate and the first gusset;
Described tube-sheet type airflow uniform distribution unit comprises the second gusset, airflow uniform distribution pipe and the second airflow uniform distribution plate, the surface of described second gusset is provided with pore and the second plate hole, pore and the second orifice plate be arranged in parallel respectively, are respectively used to the gentle second airflow uniform distribution plate of airflow uniform distribution pipe described in fixed support; Described airflow uniform distribution pipe is arranged between described second gusset with identical level height; Described second airflow uniform distribution plate is arranged between described second gusset with identical level height, adopts thread connecting mode to fix between described airflow uniform distribution pipe and the second gusset and between the second airflow uniform distribution plate and the second gusset; Described airflow uniform distribution pipe is arranged at the top of described second airflow uniform distribution plate;
Before described board-like airflow uniform distribution unit and the uniform unit of tube-sheet type are arranged at demister in mode parallel with one another.
Airflow uniform distribution pipe and air-flow uniform board all can reach the effect of airflow uniform distribution, both operation principles are all by changing flue gas circulation path, increase flue gas local circulating resistance, regulate the flow field state of flue gas, make flue gas flow through the flow velocity of demister section relatively uniform.Both are difference, airflow uniform distribution pipe regulates local circulating resistance by adjustable pipe spacing, and airflow uniform distribution plate can regulate local circulating resistance by change distance between plates and angle of inclination, flow of flue gas direction can be changed by regulating angle of inclination simultaneously, uniform flue gas flow rate can be made under the condition of more lower resistance loss.By airflow uniform distribution pipe is fixedly connected with corresponding gusset in the mode be threaded with air-flow uniform board, be convenient to dismounting on the one hand, the gap between gap between airflow uniform distribution pipe and airflow uniform distribution plate and angle of inclination can be regulated on the other hand easily, thus the layout of this tube-sheet type air-flow even distributor can be adjusted according to different operating conditions.
Preferably, the space between the first described plate hole, between pore and between the second plate hole is 20mm ~ 160mm.Described space distance depends on the size of flue gas flow rate, and when flue gas flow rate is large, it is smaller that this space distance should be established, and namely increases pipe/plate density of setting, thus increases smoke flow resistance, and flue gas flow rate is reduced; When flue gas flow rate hour, it is larger that this space distance should be established, and namely reduces pipe/plate density of setting, thus reduce smoke flow resistance, makes flue gas flow rate become large, thus make the flue gas flow rate flowing through demister interface in absorption tower relatively uniform.Because the flow velocity in absorption tower is tending towards even, the slurries total amount of carrying in the flue gas upwards flowed reduces, this make flue gas enter mist separator of desulfurization slurries amount reduce, significantly can alleviate the load of demister; Meanwhile, uniform flue gas flow rate, also makes the demisting efficiency of demister significantly promote, and thus, the blocking probability of demister and demister export the amount of solid of carrying to be reduced greatly.
The first described gusset and the height of the second gusset are 200mm ~ 600mm, and thickness of slab is 10mm ~ 50mm.
The number of described first gusset and the second gusset is at least 2, when airflow uniform distribution pipe/plate is oversize, in order to strengthen the stability of airflow uniform distribution pipe and air-flow uniform board further, can increase some gussets wherein and being fixed.
Described airflow uniform distribution pipe is the pipe of external diameter 40 ~ 150mm, thickness of pipe wall 4 ~ 10mm.
Described first airflow uniform distribution plate and the second airflow uniform distribution plate are the flat board of width 40mm ~ 240mm, wall thickness 4mm ~ 10mm, the two ends of described first airflow uniform distribution plate and the second airflow uniform distribution plate are respectively the first cylindrical tube with spiral lamination and the second cylindrical tube, described first cylindrical tube and the second cylindrical tube are connected with the first plate hole and the second plate hole threaded engagement respectively, and the length of described first cylindrical tube and the second cylindrical tube is 150 ~ 300mm.
According to the flow condition of actual flue gas, described airflow uniform distribution pipe and described second airflow uniform distribution plate can adopt multilayer to arrange, space distance is between layers 20mm ~ 100mm.
Described first airflow uniform distribution plate, airflow uniform distribution pipe and the second airflow uniform distribution plate are respectively apart from the edge 20 ~ 50mm of corresponding gusset surrounding.
Described first gusset, the second gusset, the first airflow uniform distribution plate, airflow uniform distribution pipe and the second airflow uniform distribution plate are acrylic resin or strengthen improvement polyacrylic resin material and be made.
Adjacent board-like airflow uniform distribution unit and the uniform unit of tube-sheet type adopt clamp to fix.
In actual applications, first according to the size of flue size design gusset and the length of air-flow uniform board and airflow uniform distribution pipe, flue gas flow rate and velocity flow profile situation in flue is known by analog result, thus determine space distance between airflow uniform distribution plate and between airflow uniform distribution pipe and need the number of plies of airflow uniform distribution plate/pipe that arranges, assembling tube-sheet type airflow uniform distribution device, before being then arranged at the demister in flue by the tube-sheet type airflow uniform distribution device assembled.When operating mode changes, regulated the angle of inclination of gap or uniform board by the gentle stream uniform board of the equal stringing of swirling eddy.
Structure of the present utility model effectively can regulate the velocity flow profile of flue gas in absorption tower, make by the flue gas flow rate of demister section more even, fully improve the demisting efficiency of demister, finally reduce units consumption, reduce the dust content of fume emission, there is the significance of energy-saving and emission-reduction.
Beneficial effect: in the spray void tower of wet desulphurization, flue gas from bottom to top flows, the impact that effect of boundary layer and adsorption tower smoke due to limit, absorption tower wall are imported and exported, causes flue gas to flow in tower very uneven.After corresponding airflow uniform distribution device is installed before demister, at flow velocity higher position, reduce the inclination angle of distance between plates or plate, namely layout density or the inclined degree of plate is increased, the resistance of flow of flue gas is increased, and in flow velocity lower, increase the inclination angle of distance between plates or plate, namely layout density or the inclined degree of plate is increased, the resistance of flow of flue gas is reduced, the velocity of flue gas of former High Velocity Area is made to reduce like this, the flue gas flow rate in low flow velocity district increases, thus it is relatively uniform to reach in absorption tower the flue gas flow rate flowing through demister section, make this place's velocity variance≤± 5.0%.Because the flow velocity in absorption tower is tending towards even, the slurries total amount of carrying in the flue gas upwards flowed reduces, this make flue gas enter mist separator of desulfurization slurries amount reduce, significantly can alleviate the load of demister; Simultaneously, uniform flue gas flow rate, also the demisting efficiency of demister is made significantly to promote, thus, the blocking probability of demister and demister export the amount of solid of carrying to be reduced greatly, obviously can alleviate the generation of " gypsum rain " phenomenon of wet desulphurization, effectively solve heat exchanger or flue surfaces gyrpseous scale problem, reduce the solid dust pollutant load in fume emission process further.
Accompanying drawing explanation
Fig. 1 is the structural representation of board-like airflow uniform distribution unit of the present utility model;
Fig. 2 is the side view of board-like airflow uniform distribution unit of the present utility model;
Fig. 3 is the structural representation of the first airflow uniform distribution plate of board-like airflow uniform distribution unit;
Fig. 4 is the structural representation of tube-sheet type airflow uniform distribution unit of the present utility model;
Fig. 5 is the side view of tube-sheet type airflow uniform distribution unit;
Fig. 6 is the structural representation of the second airflow uniform distribution version of tube-sheet type airflow uniform distribution unit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model patent is further described.
As shown in Fig. 1 ~ 7, flue gas desulfurization demister airflow uniform distribution assembly of the present utility model comprises board-like airflow uniform distribution unit and the uniform unit of tube-sheet type, this Plant arrangement is before desulfurizing tower demister at different levels, and clear distance 400mm ~ 1000mm between demister, demister form can be flat or ridge type.Board-like airflow uniform distribution unit and the uniform unit of tube-sheet type adopt when conbined usage clamp to carry out parallel connection and fix.
Wherein, board-like airflow uniform distribution unit comprises the first gusset 1 and the first airflow uniform distribution plate 2, first gusset 1 surface offers the first plate hole 3, first airflow uniform distribution plate 2 is arranged between the first gusset 1 with identical level height, is threaded connection fixing between the first airflow uniform distribution plate 2 and the first gusset 1.Above-mentioned parts are poly-third resin (PP) material, also can be to strengthen to improve acrylic resin (PPHG) material.Space distance between first plate hole 3 is 50mm (this distance can regulate according to actual flue gas flow rate situation); First airflow uniform distribution plate 2 can be set to multilayer, and distance is between layers 30mm.As shown in Figure 3, the first airflow uniform distribution plate 2 is the flat board of width 100mm, and wall thickness 8mm, length is 1500mm.The two ends of the first airflow uniform distribution plate 2 are the first cylindrical tube 9 with spiral lamination, and this cylindrical tube 9 is connected with the first plate hole 3 threaded engagement, and cylindrical tube 9 length is 200mm.First gusset 1 is highly 400mm, thickness of slab 15mm.
As shown in Figure 2, first airflow uniform distribution plate 2 is apart from edge about the 20 ~ 40mm of the first gusset 1, distance Edge Distance is crossed young pathbreaker and is caused airflow uniform distribution plate to be difficult to fix on gusset, easy damage or come off, distance Edge Distance is crossed senior general and is caused distance between plates between two groups of airflow uniform distribution devices excessive, is unfavorable for the control of airflow uniform distribution.
As shown in Figure 4, the surface that tube-sheet type airflow uniform distribution unit comprises the second gusset 4, airflow uniform distribution pipe 5 and the second airflow uniform distribution plate 6, second gusset 4 is provided with pore 7 and the second plate hole 8, is respectively used to the gentle second airflow uniform distribution plate 6 of fixed support airflow uniform distribution pipe 5; Airflow uniform distribution pipe 5 is arranged between the second gusset 4 with identical level height; Second airflow uniform distribution plate 6 is arranged between the second gusset 4 with identical level height, adopts thread connecting mode to fix between airflow uniform distribution pipe 5 and the second gusset 4 and between the second airflow uniform distribution plate 6 and the second gusset 4; Airflow uniform distribution pipe 5 is arranged at the top of the second airflow uniform distribution plate 6; Above-mentioned three kinds of parts are poly-third resin (PP) material equally, also can be to strengthen to improve acrylic resin (PPHG) material.
As shown in Figure 5, the space distance between pore 7 and between the second plate hole 8 is 50mm (this distance can regulate according to actual flue gas flow rate situation); Distance between airflow uniform distribution pipe 2 layers and the second airflow uniform distribution plate 6 layers is 30mm.Angle between second airflow uniform distribution plate 6 and horizontal plane realizes by rotating this second airflow uniform distribution plate 6.As shown in Figure 6, the flat board of the width 100mm of the second airflow uniform distribution plate 6, wall thickness 8mm, length is 1500mm.The two ends of the second airflow uniform distribution plate 6 are be connected with the second orifice plate 8 threaded engagement with the second cylindrical tube 10, second cylindrical tube 10 of spiral lamination, and the length of the second cylindrical tube 10 is 250mm.Airflow uniform distribution pipe 5 is external diameter
pipe, wall thickness 8mm, length is 1500mm.The two ends of airflow uniform distribution pipe 5 and the second airflow uniform distribution plate 6 all protrude from the outside 50mm of the second gusset 4.Second gusset 4 is highly 400mm, thickness of slab 15mm.Second airflow uniform distribution plate 6 and airflow uniform distribution pipe 5, apart from edge about the 20 ~ 40mm of the second gusset 4, are crossed young pathbreaker apart from Edge Distance and are caused airflow uniform distribution plate or airflow uniform distribution pipe to be difficult to fix on gusset, easily damage or come off; Distance Edge Distance cross senior general to cause between two airflow uniform distribution devices distance between plates or tube pitch excessive, be unfavorable for the control of airflow uniform distribution.
In the process that reality uses, design according to absorption tower, the real data measured, adopt flow dynamics analysis software, analog computation goes out gas flowfield distribution situation in absorption tower, determine the size of gusset and the length of air-flow uniform board and airflow uniform distribution pipe further, total principle is at flow velocity higher position, reduce pipe, distance between plates, namely pipe is increased, the layout density of plate, swirling eddy uniform board simultaneously, airflow uniform distribution plate inclination angle is made to become large, thus the resistance of flow of flue gas is increased, and in flow velocity lower, increase pipe, distance between plates, namely pipe is reduced, the layout density of plate, swirling eddy uniform board simultaneously, the inclination angle of airflow uniform distribution plate is diminished, reduce smoke flow resistance, the velocity of flue gas of former High Velocity Area is made to reduce like this, the flue gas flow rate in low flow velocity district increases, thus it is relatively uniform to reach in absorption tower the flue gas flow rate flowing through demister section.The change of tube pitch can by optionally installing or not installing airflow uniform distribution pipe to realize in the pore of correspondence.
Such as, in the application, before being arranged at demister after board-like for group airflow uniform distribution unit and the parallel connection of tube-sheet type airflow uniform distribution unit, because tube-sheet type airflow uniform distribution unit has larger resistance, so by described tube-sheet type airflow uniform distribution cell layout in the higher region of flue gas flow rate, and by board-like airflow uniform distribution cell layout in the lower region of flue gas flow rate, simultaneously, can according to concrete operating mode, flue gas flow rate is regulated further by regulating the number of the inclination angle of airflow uniform distribution plate or adjustment airflow uniform distribution plate or airflow uniform distribution pipe, the flue gas entering demister is uniformly distributed, the demisting efficiency of demister is significantly promoted.Not only reduce the blocking probability of demister, also greatly reduce demister and export the amount of solid of carrying.
The above is only the preferred embodiment of the utility model patent; be noted that for those skilled in the art; under the prerequisite not departing from the utility model patent principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the utility model patent.
Claims (10)
1. a flue gas desulfurization demister airflow uniform distribution assembly, is characterized in that, comprises board-like airflow uniform distribution unit and the uniform unit of tube-sheet type, wherein,
Described board-like airflow uniform distribution unit comprises the first gusset (1) and the first airflow uniform distribution plate (2), described first gusset (1) surface offers the first plate hole (3), described first airflow uniform distribution plate (2) is arranged between described first gusset (1) with identical level height, is threaded connection fixing between described first airflow uniform distribution plate (2) and the first gusset (1);
Described tube-sheet type airflow uniform distribution unit comprises the second gusset (4), airflow uniform distribution pipe (5) and the second airflow uniform distribution plate (6), the surface of described second gusset (4) is provided with pore (7) and the second plate hole (8), pore (7) and the second orifice plate (8) be arranged in parallel respectively, are respectively used to the gentle second airflow uniform distribution plate (6) of airflow uniform distribution pipe (5) described in fixed support; Described airflow uniform distribution pipe (5) is arranged between described second gusset (4) with identical level height; Described second airflow uniform distribution plate (6) is arranged between described second gusset (4) with identical level height, adopts thread connecting mode to fix between described airflow uniform distribution pipe (5) and the second gusset (4) and between the second airflow uniform distribution plate (6) and the second gusset (4); Described airflow uniform distribution pipe (5) is arranged at the top of described second airflow uniform distribution plate (6);
Before described board-like airflow uniform distribution unit and the uniform unit of tube-sheet type are arranged at demister in mode parallel with one another.
2. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, it is characterized in that, the space between described the first plate hole (3), between pore (7) and between the second plate hole (8) is 20mm ~ 160mm.
3. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, is characterized in that, described the first gusset (1) and the height of the second gusset (4) are 200mm ~ 600mm, and thickness of slab is 10mm ~ 50mm.
4. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, is characterized in that, the number of described first gusset (1) and the second gusset (4) is at least 2.
5. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, is characterized in that, the pipe that described airflow uniform distribution pipe (5) is external diameter 40 ~ 150mm, thickness of pipe wall 4 ~ 10mm.
6. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, it is characterized in that, the flat board that described first airflow uniform distribution plate (2) and the second airflow uniform distribution plate (6) are width 40mm ~ 240mm, wall thickness 4mm ~ 10mm, the two ends of described first airflow uniform distribution plate (2) and the second airflow uniform distribution plate (6) are respectively the first cylindrical tube (9) with spiral lamination and the second cylindrical tube (10), described first cylindrical tube (9) is connected with the first plate hole (3) and the second plate hole (8) threaded engagement respectively with the second cylindrical tube (10), the length of described first cylindrical tube (9) and the second cylindrical tube (10) is 150 ~ 300mm.
7. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, it is characterized in that, described airflow uniform distribution pipe (5) and described second airflow uniform distribution plate (6) adopt multilayer to arrange, space distance is between layers 20mm ~ 100mm.
8. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, it is characterized in that, described first airflow uniform distribution plate (2), airflow uniform distribution pipe (5) and the second airflow uniform distribution plate (6) are respectively apart from the edge 20 ~ 50mm of corresponding gusset surrounding.
9. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, it is characterized in that, described first gusset (1), the second gusset (4), the first airflow uniform distribution plate (2), airflow uniform distribution pipe (5) and the second airflow uniform distribution plate (6) are acrylic resin or strengthen improvement polyacrylic resin material and be made.
10. flue gas desulfurization demister airflow uniform distribution assembly according to claim 1, is characterized in that, adjacent board-like airflow uniform distribution unit and the uniform unit of tube-sheet type adopt clamp to fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420644967.9U CN204233971U (en) | 2014-10-30 | 2014-10-30 | A kind of flue gas desulfurization demister airflow uniform distribution assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420644967.9U CN204233971U (en) | 2014-10-30 | 2014-10-30 | A kind of flue gas desulfurization demister airflow uniform distribution assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204233971U true CN204233971U (en) | 2015-04-01 |
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ID=52763527
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|---|---|---|---|
| CN201420644967.9U Expired - Fee Related CN204233971U (en) | 2014-10-30 | 2014-10-30 | A kind of flue gas desulfurization demister airflow uniform distribution assembly |
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| Country | Link |
|---|---|
| CN (1) | CN204233971U (en) |
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| C14 | Grant of patent or utility model | ||
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