CN201132100Y - Trough and tube gas-liquid distribution apparatus for packed tower - Google Patents
Trough and tube gas-liquid distribution apparatus for packed tower Download PDFInfo
- Publication number
- CN201132100Y CN201132100Y CNU2007200983520U CN200720098352U CN201132100Y CN 201132100 Y CN201132100 Y CN 201132100Y CN U2007200983520 U CNU2007200983520 U CN U2007200983520U CN 200720098352 U CN200720098352 U CN 200720098352U CN 201132100 Y CN201132100 Y CN 201132100Y
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- vertical load
- distributing trough
- cell body
- liquid distributor
- bearing
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Abstract
The utility model relates to a groove tube gas-liquid distribution device suitable for a filled tower. Vertical load bearing distributing grooves and a horizontal liquid distributing tube form a disk shaped groove tube bank, movable supporting structure is respectively adopted between the groove and the tube, the groove and the tower wall, and the tube and the tower wall, so that the groove and the tube, the groove and the tower wall, and the tube and the tower wall can make mutually relative movement. When the device or the tower structure, especially the vertical load bearing distributing grooves with large span are deformed because of heat expansion and cold contraction, the connection relations allow the change of the relative position among the structures, overall translation can be achieved when the deformation is large, and thus the groove body, the tube wall, the tower wall or the tower structure at stress concentration positions can be effectively avoided from being damaged. Besides the liquid distribution function, the vertical load bearing distributing grooves of the device are also endowed with the function of supporting the device, therefore, not only the axial height of the device is reduced, but also the reduction of the construction cost of the tower structure and the device is favorable. The device has the advantages of deformation resistance, low axial height, convenient disassembly, assembly and maintenance.
Description
Technical field
The utility model belongs to packed tower, relates to a kind of barrel gas-liquid distribution apparatus that is applicable to the filler tower.
Background technology
High performance gas-liquid distribution apparatus is to give full play to carrier performance, improves the assurance of filler mass-transfer efficiency and production capacity.For many years tower is obtained remarkable progress with the research and development of gas-liquid distribution apparatus, in design with use and be gradually improved.The version of existing gas-liquid distribution apparatus is a lot, can reduce slot type, disc type, tubular type, injecting type and combined type, though the gas-liquid distribution apparatus of each version is in the liquid distribution dot density, cloth liquid mode, cloth liquid uniformity, the uniformity that cloth liquid is formed, pressure drop, technical performances such as anti-stifled ability differ from one another, but the internal structure connection of said apparatus is all adopted the structure that is rigidly connected with device and being connected of tower wall.Because it is not rarely seen that tower structure and gas-liquid distribution apparatus exist the apparatus structure that difference caused of coefficient of thermal expansion and contraction to be out of shape the apparatus structure distortion of large-scale tower particularly, and the malformation of device is to cause one of basic reason of its operational efficiency reduction.In addition, the axial dimension of above-mentioned gas-liquid distribution apparatus is bigger, has also increased the cost of tower structure and device itself.
Summary of the invention
The utility model is to have ability of anti-deformation difference and the bigger technical problem of axial dimension that large stuffing tower exists with the gas-liquid distribution apparatus now in order to solve, and discloses the barrel gas-liquid distribution apparatus that is applicable to the filler tower that a kind of ability of anti-deformation is strong, axial dimension is less.
The utility model is taked following technical scheme for solving existing tower with the above-mentioned technical problem that the gas-liquid distribution apparatus exists: this gas-liquid distribution apparatus is by liquid distributor, the distributing trough that cell body and bottom land constitute is formed, it is characterized in that: the vertical load-bearing distributing trough of each that be arranged in parallel, its two ends are provided with the load-bearing supporting construction that makes it to be supported horizontally inside the tower wall and this distributing trough is slided along its long axis direction, vertically be provided with between the load-bearing distributing trough and be communicated with it, isometric horizontal liquid distributor uniformly-spaced arranged side by side, each isometric horizontal liquid distributor is respectively equipped with and makes it to be supported horizontally inside pairing vertical load-bearing distributing trough and make this isometric horizontal liquid distributor along its supporting construction in axial sliding, be respectively equipped with between one side of each vertical load-bearing distributing trough and the tower wall and be communicated with it, not isometric horizontal liquid distributor uniformly-spaced arranged side by side, each not an end of isometric horizontal liquid distributor be provided with and make it to be supported horizontally inside pairing vertical load-bearing distributing trough and make this not isometric horizontal liquid distributor along its supporting construction in axial sliding, other end sealing also is provided with and makes it to be supported horizontally inside the tower wall and along its translation supporting construction that radially slides, the cell body of described each vertical load-bearing distributing trough is made of outer cell body and interior cell body respectively, the bottom land of interior cell body is provided with the gas rising passway, in described each vertical load-bearing distributing trough, the cell body wall lower, transverse of water jacket long axis of body direction uniformly-spaced is provided with the liquid distribution hole, described each bottom surface isometric and not isometric horizontal liquid distributor body is provided with vertical tube connector respectively at interval, each tube connector is connected with horizontal cloth liquid arm, and the bottom surface of each cloth liquid arm body uniformly-spaced is provided with the liquid distribution hole.
The utility model can also be taked following technical measures:
Its shape of interior cell body of described each vertical load-bearing distributing trough is identical with outer cell body, the inside groove body thickness and equal highly at least outer cell body thickness and the height, its two ends, two side of inside groove long axis of body direction are provided with the stiffener that is connected in outer cell body two ends, are provided with liquid at interval between stiffener bottom and the bottom land.
The trench bottom integral body of its interior cell body of described each vertical load-bearing distributing trough is the gas rising passway.
The trench bottom of its interior cell body of described each vertical load-bearing distributing trough constitutes the gas rising passway by the through hole that is spacedly distributed.
Described each isometric, that axis not isometric horizontal liquid distributor is positioned at vertical load-bearing distributing trough bottom.
Described supporting construction be the cell body of vertical load-bearing distributing trough be provided with it be communicated with, by the fastening sliding sleeve of flange, two pipe ends of isometric horizontal liquid distributor and the corresponding pipe end and the sliding sleeve of isometric horizontal liquid distributor are not slidably engaged.
Described supporting construction is that isometric horizontal liquid distributor is made of two pipeline sections, the outboard end of two pipeline sections is respectively equipped with the flange that is connected in pairing vertical load-bearing distributing trough, each pipeline section is connected with pairing vertical load-bearing distributing trough respectively, pipe end between two pipeline sections is fixed with inner sleeve, and another pipe end and inner sleeve are slidably engaged.
Described translation supporting construction is the gripper shoe that the tower wall is provided with the horizontal support axle of band, and the sealing pipe end of isometric horizontal liquid distributor is not provided with and laterally supports the orifice plate that axle is slidably engaged.
Described translation supporting construction is that the tower wall is provided with the laterally gripper shoe of support axle of band, laterally the support axle is provided with a collar, the sealing pipe end of isometric horizontal liquid distributor is not provided with the minor axis concentric with it, and this minor axis is provided with another collar, and this collar fixes with the collar that laterally supports axle.
The beneficial effects of the utility model and advantage are: this gas-liquid distribution apparatus is connected to form and is dish type barrel group by each vertical load-bearing distributing trough, horizontal liquid distributor, between its groove and the pipe, between groove and the tower wall, between the Guan Yuta wall, adopt the flexible connection form, make between groove and pipe, groove and Ta Bi, the Guan Yuta wall be connected to become can relative motion annexation.When each bigger vertical load-bearing distributing trough of this device or tower structure, particularly span distortion occurs because of expanding with heat and contract with cold, above-mentioned annexation will allow interstructural relative position to change, dish type barrel group can integral translation when distortion was big, thereby can effectively avoid stress to concentrate the cell body at position or tube wall or tower wall or tower structure destroyed, guarantee the stable of operational efficiency.The vertical load-bearing distributing trough of each of this device is except that having cloth liquid function, also give the weight-bearing function that it supports this device, the intensity of its cell body and load-bearing supporting construction can satisfy the condition of load-bearing, therefore this device can save essential spandrel girder structure usually, the axial height of this device is obviously reduced, help reducing the cost of tower structure and device itself.Each barrel member of this device also has percent opening height, good rigidity, no leakage, the uniform characteristics of cloth liquid.The utility model and existing gas-liquid distribution apparatus relatively has anti-deformation and axial height is low, be convenient to the outstanding advantage of dismounting and maintenance can be widely used in industrial circles such as chemical industry, petrochemical industry, ethene, oil refining.
Description of drawings
Accompanying drawing 1 is the example structure schematic diagram.
Accompanying drawing 2 is the vertical load-bearing distributing trough of embodiment structural representations.
Accompanying drawing 3 is the isometric horizontal liquid distributor structural representations of embodiment.
Accompanying drawing 4 is Fig. 3 a-a section enlarged diagrams.
Accompanying drawing 5 is Figure 1A portion structural profile enlarged drawings.
Accompanying drawing 7 is vertical load-bearing distributing trough example structure schematic diagrames.
Accompanying drawing 8 is Fig. 7 b-b cross-sectional view.
Accompanying drawing 9 is Fig. 7 c-c cross-sectional view.
Accompanying drawing 10 is isometric horizontal liquid distributor supporting construction embodiment generalized sections.
Accompanying drawing 11 is not isometric horizontal liquid distributor translation supporting construction example structure schematic diagrames.
Accompanying drawing 12 is that Figure 11 D is to schematic diagram.
Number in the figure: 1 vertical load-bearing distributing trough, the outer cell body of 1-1, cell body in the 1-2,1-2 ' stiffener, 1-3 bottom land, 1-4 are crossed liquid at interval, 2 isometric horizontal liquid distributors, 2-1 inner sleeve, 3 not isometric horizontal liquid distributors, 4 load-bearing supporting constructions, 4-1 axle sleeve, 4-2 supporting disk axle, the 4-3 intermediate plate, 5 translation supporting constructions, 5-1 gripper shoe, 5-2 connects orifice plate, and 5-3 laterally supports axle, the 5-4 collar, the 5-5 minor axis, 6 supporting constructions, 6-1 ring flange, the 6-2 sliding sleeve, the 6-3 screw, 7 gas rising passwaies, 8 cloth liquid arms, 9 liquid distribution holes, 10 communicating pipes.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing thereof the utility model is described in detail.
Embodiment is this gas-liquid distribution apparatus that is disposed at the packed tower of 7 meters of nominal dimension tower diameters as shown in Figure 1.This device two vertical load-bearing distributing troughs 1 that be arranged in parallel, its two ends are provided with the load-bearing supporting construction 4 that makes it to be supported horizontally inside the tower wall and this distributing trough is slided along its long axis direction.Be provided with 15 isometric horizontal liquid distributors 2 uniformly-spaced arranged side by side between two vertical load-bearing distributing troughs 1, the two ends of each liquid distributor are provided with and make it to be supported horizontally inside pairing vertical load-bearing distributing trough 1 and can make it along its supporting construction 6 in axial sliding.Be respectively equipped with 15 not isometric horizontal liquid distributors 3 uniformly-spaced arranged side by side between one side of two vertical load-bearing distributing troughs 1 and the tower wall, the medial extremity of each liquid distributor is provided with and makes it to be supported horizontally inside pairing vertical load-bearing distributing trough 1 and can make it along its supporting construction 6 in axial sliding.Each not the outside blind end of isometric horizontal liquid distributor be provided with and make it to be supported horizontally inside the tower wall and make this liquid distributor along its translation supporting construction 5 that radially slides.For helping cloth liquid effect, the bottom that each of present embodiment is isometric, axis not isometric horizontal liquid distributor is positioned at vertical load-bearing distributing trough 1.
As shown in Figure 2, the cell body of the vertical load-bearing distributing trough 1 of each of embodiment is made of outer cell body 1-1, interior cell body 1-2 and bottom land 1-3, and the inside groove shape is identical with outer cell body, is the liquid storage space between the inside and outside cell body.Trench bottom integral body between the interior cell body 1-2 is gas rising passway 7.
The cell body wall lower, transverse of outer cell body 1-1 and interior cell body 1-2 long axis direction is solid matter liquid distribution hole 9 uniformly-spaced.
The outer cell body 1-1 of the vertical load-bearing distributing trough 1 of each of embodiment, interior cell body 1-2 and bottom land 1-3 adopt thick 6mm corrosion resistant plate compacting welding to make, outer cell body 1-1 flute length is 6100mm, groove width 320mm, and the groove height is 520mm, interior cell body 1-2 and outer cell body 1-1 are contour, and 9 apertures, liquid distribution hole are 4mm.
Among Fig. 2, vertically the load-bearing supporting construction 4 of load-bearing distributing trough 1 is the two axle sleeve 4-1 of 30mm by each aperture that is provided with, distributing trough two ends and constitutes with supporting disk axle 4-2 that two axle sleeve 4-1 are slidably engaged, and each supporting disk axle 4-2 is anchored on the two intermediate plate 4-3 that are weldingly fixed on the tower wall by screw respectively.The vertical load-bearing distributing trough of embodiment be shaft type, have enough bearing capacities.
Shown in Fig. 1,3,4, the bottom surface of the isometric horizontal liquid distributor 2 of each of embodiment is provided with vertical communicating pipe 10 respectively at interval, is connected with horizontal cloth liquid arm 8 each communicating pipe respectively.The bottom surface of each cloth liquid arm 8 is provided with the liquid distribution hole 9 of 4 bell mouth shapes respectively at interval.
The isometric horizontal liquid distributor 2 long 2360mm of embodiment, external diameter is 50mm, cloth liquid arm 8 long 320mm, external diameter is 15mm.
The outside blind end of each not isometric horizontal liquid distributor 3 of embodiment constitutes the outer rim of coincideing with tower wall shape shown in Fig. 1 arc dotted line, the length of each not isometric horizontal liquid distributor 3 does not wait by 200 to 2360mm, cloth liquid arm, communicating pipe structure be same as isometric horizontal liquid distributor 2 shown in Figure 3.
The supporting construction 6 at each isometric horizontal liquid distributor 2 two ends of embodiment as shown in Figure 5.
As shown in Figure 5, the two ends of each isometric horizontal liquid distributor 2 are provided with the sliding sleeve 6-2 in the supporting construction 6 respectively, and each sliding sleeve is anchored on load-bearing distributing trough 1 by flange 6-1 and attachment screw 6-3 respectively, and sliding sleeve is communicated with load-bearing distributing trough 1.The pipe end and the sliding sleeve of isometric horizontal liquid distributor are slidably engaged.Supporting construction 6 can prevent that the fluid seepage phenomenon from appearring in related junction surface, also is convenient to the dismounting maintenance of liquid distributor simultaneously.
Supporting construction 6 shown in Figure 5 also is used for the medial extremity of the not isometric horizontal liquid distributor 3 of Fig. 1 and the vertically support and connection between the load-bearing distributing trough 1.
The translation supporting construction 5 of each not isometric horizontal liquid distributor 3 outside blind end of embodiment as shown in Figure 6.
As shown in Figure 6, the tower wall is provided with the gripper shoe 5-1 of the horizontal support axle of band 5-3, and the sealing pipe end of not isometric horizontal liquid distributor 3 is provided with and laterally supports the orifice plate 5-2 that axle is slidably engaged.
Vertical load-bearing distributing trough 1 of the present utility model can also adopt structure shown in Fig. 7,8,9.
Shown in Fig. 7,8,9, the vertical load-bearing distributing trough 1 that constitutes by outer cell body 1-1, interior cell body 1-2 and bottom land 1-3, be the liquid storage space between its inside and outside cell body, the physical dimension of outer cell body 1-1 is identical with embodiment 1, and interior cell body 1-2 adopts thick 8mm corrosion resistant plate compacting welding to make, and height is greater than outer cell body.The two ends of interior cell body 1-2 long axis direction two side are respectively equipped with the stiffener 1-2 ' that is connected in outer cell body two ends, are provided with liquid 1-4 at interval between stiffener 1-2 ' bottom and the bottom land 1-3.Thicken the bearing capacity that the interior cell body increased and stiffener 1-2 ' can obviously improve each vertical load-bearing distributing trough 1.
Among Fig. 7,8,9, the bottom land 1-3 between the interior cell body 1-2 is provided with the gas rising passway 7 that is made of the single through hole that is spacedly distributed.
The supporting construction 6 of isometric horizontal liquid distributor of the present utility model can also adopt structure shown in Figure 10.
As shown in figure 10, each isometric horizontal liquid distributor 2 is made of two pipeline sections, and the outboard end of two pipeline sections is welded with flange 6-1 respectively, and each flange is anchored on pairing vertical load-bearing distributing trough 1 by screw, and each pipeline section is connected with pairing vertical load-bearing distributing trough respectively.Pipe end between two pipeline sections is fixed with inner sleeve 2-1, and another pipe end and inner sleeve are slidably engaged.Because the scalable slip of isometric horizontal liquid distributor that two pipeline sections constitute, therefore isometric horizontal liquid distributor 2 can move along its axis.
The translation supporting construction of the not isometric horizontal liquid distributor 3 of the utility model can also adopt structure shown in Figure 11,12.
Shown in Figure 11,12, the tower wall is provided with the laterally gripper shoe 5-1 of support axle 5-3 of band, and laterally the support axle is provided with a collar 5-4, and the sealing pipe end of not isometric horizontal liquid distributor 3 is provided with the minor axis 5-5 concentric with it, this minor axis is provided with another collar 5-4, and this collar is fixing with the collar bottom welding of laterally supportting axle.This translation supporting construction embodiment can also realize that it moves axially when realizing the moving radially of isometric horizontal liquid distributor not.
Claims (9)
1, a kind of barrel gas-liquid distribution apparatus that is applicable to the filler tower, by liquid distributor, the distributing trough that cell body and bottom land constitute is formed, it is characterized in that: the vertical load-bearing distributing trough of each that be arranged in parallel, its two ends are provided with the load-bearing supporting construction that makes it to be supported horizontally inside the tower wall and this distributing trough is slided along its long axis direction, vertically be provided with between the load-bearing distributing trough and be communicated with it, isometric horizontal liquid distributor uniformly-spaced arranged side by side, each isometric horizontal liquid distributor is respectively equipped with and makes it to be supported horizontally inside pairing vertical load-bearing distributing trough and make this isometric horizontal liquid distributor along its supporting construction in axial sliding, be respectively equipped with between one side of each vertical load-bearing distributing trough and the tower wall and be communicated with it, not isometric horizontal liquid distributor uniformly-spaced arranged side by side, each not an end of isometric horizontal liquid distributor be provided with and make it to be supported horizontally inside pairing vertical load-bearing distributing trough and make this not isometric horizontal liquid distributor along its supporting construction in axial sliding, other end sealing also is provided with and makes it to be supported horizontally inside the tower wall and along its translation supporting construction that radially slides, the cell body of described each vertical load-bearing distributing trough is made of outer cell body and interior cell body respectively, the bottom land of interior cell body is provided with the gas rising passway, in described each vertical load-bearing distributing trough, the cell body wall lower, transverse of water jacket long axis of body direction uniformly-spaced is provided with the liquid distribution hole, described each bottom surface isometric and not isometric horizontal liquid distributor body is provided with vertical tube connector respectively at interval, each tube connector is connected with horizontal cloth liquid arm, and the bottom surface of each cloth liquid arm body uniformly-spaced is provided with the liquid distribution hole.
2, barrel gas-liquid distribution apparatus according to claim 1, it is characterized in that: its shape of interior cell body of described each vertical load-bearing distributing trough is identical with outer cell body, the inside groove body thickness and equal the water jacket body thickness highly at least and the height, its two ends, two side of inside groove long axis of body direction are provided with the stiffener that is connected in outer cell body two ends, are provided with liquid at interval between stiffener bottom and the bottom land.
3, barrel gas-liquid distribution apparatus according to claim 1 is characterized in that: the trench bottom integral body of its interior cell body of described each vertical load-bearing distributing trough is the gas rising passway.
4, barrel gas-liquid distribution apparatus according to claim 1 is characterized in that: the trench bottom of its interior cell body of described each vertical load-bearing distributing trough constitutes the gas rising passway by the through hole that is spacedly distributed.
5, barrel gas-liquid distribution apparatus according to claim 1 is characterized in that: described each isometric, that axis not isometric horizontal liquid distributor is positioned at vertical load-bearing distributing trough bottom.
6, barrel gas-liquid distribution apparatus according to claim 1, it is characterized in that: described supporting construction be the cell body of vertical load-bearing distributing trough be provided with it be communicated with, by the fastening sliding sleeve of flange, two pipe ends of isometric horizontal liquid distributor and the corresponding pipe end and the sliding sleeve of isometric horizontal liquid distributor are not slidably engaged.
7, barrel gas-liquid distribution apparatus according to claim 1, it is characterized in that: described supporting construction is that isometric horizontal liquid distributor is made of two pipeline sections, the outboard end of two pipeline sections is respectively equipped with the flange that is connected in pairing vertical load-bearing distributing trough, each pipeline section is connected with pairing vertical load-bearing distributing trough respectively, pipe end between two pipeline sections is fixed with inner sleeve, and another pipe end and inner sleeve are slidably engaged.
8, barrel gas-liquid distribution apparatus according to claim 1 is characterized in that: described translation supporting construction is the gripper shoe that the tower wall is provided with the horizontal support axle of band, and the sealing pipe end of isometric horizontal liquid distributor is not provided with and laterally supports the orifice plate that axle is slidably engaged.
9, barrel gas-liquid distribution apparatus according to claim 1, it is characterized in that: described translation supporting construction is that the tower wall is provided with the laterally gripper shoe of support axle of band, laterally the support axle is provided with a collar, the sealing pipe end of isometric horizontal liquid distributor is not provided with the minor axis concentric with it, this minor axis is provided with another collar, and this collar fixes with the collar that laterally supports axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200983520U CN201132100Y (en) | 2007-12-06 | 2007-12-06 | Trough and tube gas-liquid distribution apparatus for packed tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200983520U CN201132100Y (en) | 2007-12-06 | 2007-12-06 | Trough and tube gas-liquid distribution apparatus for packed tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201132100Y true CN201132100Y (en) | 2008-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200983520U Expired - Fee Related CN201132100Y (en) | 2007-12-06 | 2007-12-06 | Trough and tube gas-liquid distribution apparatus for packed tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201132100Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698570A (en) * | 2012-06-26 | 2012-10-03 | 天津天大天久科技股份有限公司 | Composite feed pipe of packed tower |
| CN103386209A (en) * | 2012-05-08 | 2013-11-13 | 中国石油化工集团公司 | Inner sleeve plate structure for plate-type fractionating tower |
| CN103386210A (en) * | 2012-05-08 | 2013-11-13 | 中国石油化工集团公司 | Inner sleeve plate structure of packed fractionating tower |
| CN106984141A (en) * | 2017-06-07 | 2017-07-28 | 宁夏龙江化工科技有限公司 | A kind of spray absorber |
-
2007
- 2007-12-06 CN CNU2007200983520U patent/CN201132100Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103386209A (en) * | 2012-05-08 | 2013-11-13 | 中国石油化工集团公司 | Inner sleeve plate structure for plate-type fractionating tower |
| CN103386210A (en) * | 2012-05-08 | 2013-11-13 | 中国石油化工集团公司 | Inner sleeve plate structure of packed fractionating tower |
| CN103386210B (en) * | 2012-05-08 | 2015-01-21 | 中国石油化工集团公司 | Inner sleeve plate structure of packed fractionating tower |
| CN103386209B (en) * | 2012-05-08 | 2015-05-13 | 中国石油化工集团公司 | Inner sleeve plate structure for plate-type fractionating tower |
| CN102698570A (en) * | 2012-06-26 | 2012-10-03 | 天津天大天久科技股份有限公司 | Composite feed pipe of packed tower |
| CN102698570B (en) * | 2012-06-26 | 2014-08-20 | 天津天大天久科技股份有限公司 | Composite feed pipe of packed tower |
| CN106984141A (en) * | 2017-06-07 | 2017-07-28 | 宁夏龙江化工科技有限公司 | A kind of spray absorber |
| CN106984141B (en) * | 2017-06-07 | 2019-08-06 | 宁夏龙江化工科技有限公司 | A kind of spray absorber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20161206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |