CN204254581U - Boiler flexible seal device - Google Patents
Boiler flexible seal device Download PDFInfo
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- CN204254581U CN204254581U CN201420636483.XU CN201420636483U CN204254581U CN 204254581 U CN204254581 U CN 204254581U CN 201420636483 U CN201420636483 U CN 201420636483U CN 204254581 U CN204254581 U CN 204254581U
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Abstract
The utility model provides a kind of boiler flexible seal device, described device comprises wire netting cover layer, flexible seal layer and fixed part, wherein: described flexible seal layer comprises the ceramic fibre material layer being no less than 3 layers, bonding by adhesive between adjacent 2 layers of ceramic fibre material layer; Described wire netting cover layer covers above outermost ceramic fibre material layer; The ceramic fibre material layer of inner side is bonding with the boiler component outer surface that needs seal by adhesive; Described wire netting cover layer and flexible seal layer are fixedly attached to the boiler component needing sealing by described fixed part.The utility model is by above-mentioned technological means, and the fortune of Absorbable rod boiler 20 ~ 600 DEG C of temperature difference stops the steel plate deformed caused in process, thus the problem such as leakage cigarette, leakage ash, heat radiation that solution prior art causes because of alternating thermal stress.
Description
Technical field
The utility model relates to boiler seal technical field, especially, relates to a kind of boiler flexible seal device.
Background technology
Pulverized-coal fired boiler flexible sealing is key position in whole boiler operatiopn, also be the most easily occur leaking out, leaking ash, heat radiation, the boiler roof sealing of existing boiler is generally in physical seal mode, bottom steel plate sealing (as place through walls can adopt steel plate structure of seal box), again with hard material sealings such as refractory mortar, castable refractory, insulated pouring material, then the rock cotton board of semi-rigid, rock wool or silicate aluminum board, aluminium silicate wool is used, paste with binding agent, or entirety is again with wire netting, wipe one's face with flame retardant coating.When after boiler puts into operation if there is the Vibration Condition under the condition of high temperature, hard steel plate is out of shape after can be made to be heated, cause refractory material and semi hard insulating material be full of cracks, shell, stop causing owing to restoring to the original state in process in boiler fortune and leak the problem such as cigarette, leakage ash, heat radiation, not only boiler thermal output can be reduced, and the dust flown upward affects production environment; In addition, top dust stratification overtemperature, safeguards also can to normal boiler maintenance and bring difficulty.
Utility model content
The utility model provides a kind of boiler flexible seal device, for solve prior art because of the temperature distortion of boiler hard steel plate cause sealing thermal insulation material chap, shell cause leakage cigarette, leak ash, heat radiation problem.
In order to solve the problem, the utility model discloses a kind of boiler flexible seal device, comprise wire netting cover layer, flexible seal layer and fixed part, wherein: described flexible seal layer comprises the ceramic fibre material layer being no less than 3 layers, bonding by adhesive between adjacent 2 layers of ceramic fibre material layer; Described wire netting cover layer covers above outermost ceramic fibre material layer; The ceramic fibre material layer of inner side is bonding with the boiler component outer surface that needs seal by adhesive; Described wire netting cover layer and flexible seal layer are fixedly attached to the boiler component needing sealing by described fixed part; Gross thickness>=the 60mm of described ceramic fibre material layer, density>=128kg/m
3, tensile strength>=70KPa, heat resisting temperature>=1000 DEG C; Adhesive strength>=the 3MPa of described adhesive, heat resisting temperature>=1000 DEG C.
Preferably, described flexible seal layer comprises 3 layers of ceramic fibre material, and the thickness of described three layers of ceramic fibre material layer is respectively 25mm, 13mm, 25mm by order from top to bottom.
Preferably, described flexible seal layer also comprises nickel chromium manganese steel stratum reticulare, and described nickel chromium manganese steel stratum reticulare is between any 2 layers of ceramic fibre material layer.
Preferably, when the described boiler component needing to seal is planar structure, described fixed part is stainless steel lag screws; The quantity of the stainless steel lag screws that every square metre of described wire netting cover layer is arranged is no less than 12, and by presetting aligned transfer; One end and the described boiler component sealed that needs of every root steel nail are fixed, and the other end is fixed through flexible seal layer and described metal nerve of a covering; When the described boiler component needing to seal is column construction, described fixed part is that stainless steel is tied up.
Preferably, described wire netting cover layer is stainless (steel) wire, and the mesh shape of described stainless (steel) wire is rhombus, square, oval or circular.
Preferably, the described boiler component of sealing that needs comprises: wall superheater, Late reworking, high temperature superheater, high temperature reheater, low temperature superheater wear push pipe position, low-temperature reheater wears ceiling position, column pipe wears ceiling position, ceiling position worn by front bag wall, front crossover sites, water-cooling wall both sides and position, roof tube junction, front-back wall and ceiling junction; Wherein: described flexible seal layer and wire netting cover layer are 250 ~ 500mm in the extended length of the boiler component horizontal direction needing sealing, are 250 ~ 700mm in short transverse extended length; Described ceramic fibre material adopts the paving mode of the individual layer fissure of displacement, interlayer tooled joint, and fissure of displacement distance is not less than 50mm, and seam crossing adopts adhesive bonding; Connected by fourth of the twelve Earthly Branches ring between described wire netting, the lap of splice is not less than 50mm.
Compared with prior art, the utility model has the following advantages:
The swell increment of the flexible seal layer (i.e. ceramic fibre material) that the utility model preferred embodiment comprises is not less than 60mm, therefore the steel plate deformed stopping causing in process in the fortune of boiler 20 ~ 600 DEG C of temperature difference can be absorbed by this flexible seal layer, thus the thorough problem such as leakage cigarette, leakage ash, heat radiation solving prior art and cause because of alternating thermal stress.
Accompanying drawing explanation
Fig. 1 is that the utility model boiler flexible seal device is for sealing structural representation during front crossover sites;
Fig. 2 is that the utility model boiler flexible seal device is for sealing structural representation during pendant superheater;
Fig. 3 is that the utility model boiler flexible seal device is for sealing structural representation during two-stage superheater entrance;
Fig. 4 is that the utility model boiler flexible seal device is for sealing structural representation when rear water column pipe and two-stage superheater outlet;
Fig. 5 is that the utility model boiler flexible seal device is for sealing structural representation during reheater outlet;
Fig. 6 is that the utility model boiler flexible seal device is for sealing structural representation during pendant reheater pipe;
Fig. 7 is that the utility model boiler flexible seal device is for structural representation when tube panel after burner hearth and flue antetheca pipe;
Fig. 8 is that the utility model boiler flexible seal device is for sealing structural representation when primary superheater outlet and rear pass mid-board;
Fig. 9 is that the utility model boiler flexible seal device is for sealing structural representation when ceiling and both walls.
Detailed description of the invention
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
In description of the present utility model, it will be appreciated that, term " interior ", " outward ", " centre ", " top ", " end ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.The implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In addition, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
With reference to Fig. 1 ~ 9, show the utility model boiler flexible seal device be applied to respectively front crossover sites, pendant superheater, two-stage superheater entrance, two-stage superheater outlet and rear water column pipe, reheater outlet, pendant reheater pipe, tube panel and flue antetheca pipe after burner hearth, primary superheater outlet and rear pass mid-board, ceiling and both walls time structural representation, comprise flexible seal layer 1, wire netting cover layer 3 and fixed part, wherein:
Flexible seal layer 1 comprises the ceramic fibre material layer 11 being no less than 3 layers, bonding by adhesive phase 12 between adjacent 2 layers of ceramic fibre material layer 11; The ceramic fibre material layer 11 of inner side is bonding with the boiler component outer surface that needs seal by adhesive phase 12;
The displacement that during for guaranteeing hot, expansion of metal coefficient difference in each position, junction causes is adjusted by multi-layer fiber, is absorbed, need flexible seal layer 1 intactly can absorb the expansion of Three-bearing, at each position, place through walls needs the swell increment absorbed to be no less than 60mm, the swell increment absorbed is needed to be not less than 120mm at the seam crossing of front crossover sites, roof tube and both walls, thoroughly to solve the air leakage phenomena that boiler plant causes because of hot alternation (start and stop stove and operating 20 ~ 600 DEG C of temperature difference) stress.For this reason, the index request of flexible sealing layer material is comprised in this preferred embodiment: the gross thickness>=60mm of ceramic fibre material layer, density>=128kg/m
3, tensile strength>=70KPa, heat resisting temperature>=1000 DEG C (preferred heat resisting temperature>=1260 DEG C); Adhesive strength>=the 3MPa of adhesive phase 12, heat resisting temperature>=1000 DEG C.In addition, ceramic fibre material and adhesive also should have stronger corrosion-resistant, antiscour, thermal shock resistance.
Wire netting cover layer 3 covers above outermost ceramic fibre material layer 11;
Wire netting cover layer 3 in the present embodiment can prevent flexible seal layer 1 from suffering external impact, increases the rigid of sealing device; Wire netting cover layer 3 preferably adopts stainless (steel) wire, and the mesh shape of steel mesh can be rhombus, square, oval, circular or other shapes.
For improving sealing effectiveness further, flexible seal layer 1 and wire netting cover layer 3 are 250 ~ 500mm in the extended length of the boiler component horizontal direction needing sealing, are 250 ~ 700mm in short transverse extended length; In addition, ceramic fibre material adopts the paving mode of the individual layer fissure of displacement, interlayer tooled joint, and fissure of displacement distance is not less than 50mm, and seam crossing adopts adhesive bonding; Connected by fourth of the twelve Earthly Branches ring between wire netting, the lap of splice is not less than 50mm.
Fixed part is used for wire netting cover layer 3 and flexible seal layer 1 being fixedly attached to the boiler component needing sealing;
When the boiler component needing sealing is planar structure, fixed part is stainless steel lag screws 21 (see accompanying drawing 1 ~ 9); The quantity of the stainless steel lag screws 21 that every square metre of wire netting cover layer 3 is arranged is no less than 12, and by presetting aligned transfer (can staggered pattern be adopted according to field condition, also can adopt other arrangement modes); One end of every root steel nail 21 is fixed with needing the boiler component sealed, and the other end is fixed through flexible seal layer 1 and wire netting cover layer 3; About the fixed form of stainless steel lag screws, according to site operation ambient conditions, can adopt welding manner, other also can be adopted to be fixedly connected with mode, and the utility model will not limit; In addition, about the boiler component of planar structure, flexible seal layer 3 can arrange 3 layers of ceramic fibre material layer 11, and the thickness of every layer of ceramic fibre material layer is respectively 25mm, 13mm, 25mm by order from top to bottom.
When the boiler component needing sealing is column construction, fixed part is that 22 (see accompanying drawing 2 ~ 5 and accompanying drawings 8) tied up by stainless steel, utilizes stainless steel to tie up 22 and flexible seal layer 2 and wire netting cover layer 3 is firmly bundled on boiler cylindrical part.
About ceramic fibre material paving mode, preferred employing seamlessly transits, naturally shaping form of construction work, clogs at irregular position ceramic fibre material dipping adhesive.
In a further preferred embodiment, for improving the bulk strength of sealant further, can also arrange nickel chromium manganese steel stratum reticulare 13 in the centre of flexible seal layer 1, this nickel chromium manganese steel stratum reticulare 13 can be arranged between any 2 layers of ceramic fibre material layer 11, as shown in Figure 1.
It should be noted that, said apparatus embodiment belongs to preferred embodiment, and involved parts might not be that the utility model is necessary.
Below, illustrate and comprise the technological process that the utility model adopts above-mentioned boiler flexible seal device and seals boiler associated components:
Step one, clears up pre-job site; Guarantee pre-construction area neat and tidy, clear up job site barrier simultaneously, cleaning site area must be greater than construction part area;
Step 2, at working face or the upper soldering stainless steel steel nail (its Main Function is fixing diamond pattern stainless (steel) wire) of secondary seal plate (box).Steel nail length is about 120mm, and its spacing is 20 ~ 25cm, and in staggered arranged (according to field condition), every square meter must not be less than 12, and removes clean by welding slag etc.;
Steel nail requires that two-sided welding is firm, and it should be noted that can not in pressure-containing member or stressed member (as all kinds of column pipe, bar etc.) striking, welding.
Step 3, uses ceramic fibre to fill between pipe, all smears fiber binder between ceramic fibre material and between ceramic fibre material and tube wall;
Step 4, adopt at the ceramic fibre sealant at boiler body expansion point place (grey position of leaking out) and seamlessly transit, naturally shaping mode, must not adopt tile mode; Position through walls, both walls, front wall and irregular position flexible sealing adopt the filling of ceramic fiber cotton dipping high-temperature agglomerant;
Wherein,
(1) adopt fire-resistant high-performance adhesive, serviceability temperature reaches 1000 DEG C; The density of ceramic fibre is 128Kg/m3, heat resisting temperature 1260 DEG C.
(2) plane position adopts high-temperature adhesives bonded ceramics fibrous material (ceramic fiber blanket), requires that laying is no less than 3 layers, all smears fiber binder between every layer of ceramic fibre and between ceramic fibre and tube wall; Smearing of fiber binder evenly must all cover ceramic fibre contact surface, consistency of thickness, smears fiber binder equally in ceramic fibre side face seam place; Ceramic fibre laying depth is respectively 25mm, 13mm, 25mm.2.8.2 high temperature binder must be smeared between every layer of ceramic fiber cotton and between ceramic fiber cotton and working metal face.
(3) ceramic fibre material adopts the paving mode of the individual layer fissure of displacement, interlayer tooled joint.Fissure of displacement distance is not less than 50mm and seam crossing also needs to smear high temperature binder.
(4) require compacting between every layer, smooth, firmly, the fissure of displacement bonds.
Step 5, lays rhombus stainless (steel) wire at ceramic fibre material outer surface, and it act as and prevents sealing surface from suffering external impact, increasing rigidity intensity.Steel mesh is as the criterion to cover swelling fiber sealant completely, and steel mesh overlap joint is no less than 50mm;
Wherein, adopt special fourth of the twelve Earthly Branches ring to connect between steel mesh, use square check steel disc, circular gasket is weldingly fixed on steel nail.
Step 6, is fixed to steel mesh and ceramic fibre material on boiler component.
The other end of the steel nail be welded in advance on working face is welded on steel mesh, and in the short transverse of pipe row with steel wire through outside steel mesh being fastened between pipe, every Guan Yizha, tube pitch is greater than 100mm, and every 50mm must tie up.
It should be noted that, the enforcement of the utility model flexible sealing scheme can not destroy boiler original project organization and function, retains the metal sealing box 7 (see accompanying drawing 1 and accompanying drawing 6) of former boiler design, metal sealing plate 6 (see accompanying drawing 9) and castable refractory 5 (see accompanying drawing 3 ~ 5 and accompanying drawing 9) etc.
Concrete, the sealing technology for boiler different parts is described as follows:
See accompanying drawing 1, show the sealed structural representation of front crossover sites, this embodiment carries out flexible sealing on virgin metal seal box 7, and ceramic fibre material layer 11 is laid using leakage point as central point.For improving integral sealing intensity further, in the middle of flexible seal layer 1, be provided with Ni-Cr-Mn steel mesh 13; About the extended length of sealing device, total extended length is 2700mm, wherein, extended length in right part in the figure right side of water-cooling wall upper collecting chamber 8 (namely) level and short transverse is 250mm, extended length in figure in bottom left section level and short transverse is 500mm, and the extended length in figure in upper left level and short transverse is respectively 500mm and 700mm.
See accompanying drawing 2, show the sealed structural representation of pendant superheater, this position has 14 comb screens, because pipe trestle column is larger, so adopt single row of tubes sealing means, wherein, the flexible seal layer 1 of steam pipe 4 adopts stainless steel lag screws 21 to fix, and the flexible seal layer 1 at tube panel position adopts wire binding 22 to fix.In addition, the extended length of flexible seal layer 1 in level and short transverse is 250mm.
See accompanying drawing 3, show the sealed structural representation of two-stage superheater entrance, this position has 44 tube panels, because pipe trestle column is comparatively large, so vertical direction adopts single row of tubes sealing means; For ensureing the globality of sealing, horizontal direction adopts integral sealing mode (sealing on former castable refractory 5).Wherein, the flexible seal layer 1 of castable refractory 5 adopts stainless steel lag screws 21 to fix, and the flexible seal layer 1 at tube panel position adopts wire binding 22 to fix.In addition, the extended length of flexible seal layer 1 in level and short transverse is 250mm.
See accompanying drawing 4, show the sealed structural representation of two-stage superheater outlet and rear water column pipe, this position has 88 tube panels, and vertical direction adopts single row of tubes sealing means; For ensureing the globality of sealing, horizontal direction adopts integral sealing mode (sealing on former castable refractory 5).The extended length of flexible seal layer 1 in level and short transverse is 250mm.
See accompanying drawing 5, show the sealed structural representation of reheater outlet, this position has 117 tube panels, and vertical direction adopts single row of tubes sealing means, and the extended length in short transverse is 450mm; For ensureing the globality of sealing, horizontal direction adopts integral sealing mode (sealing on former castable refractory 5), and the extended length in horizontal direction is 250mm.
See accompanying drawing 6, show the sealed structural representation of pendant reheater pipe, in order to not destroy virgin metal hermetically-sealed construction, in the integral sealing layer done by former seal box.
See accompanying drawing 7, show the sealed structural representation of stove breech tube panel and flue antetheca pipe, for ensureing the globality of sealing, horizontal direction adopts integral sealing mode.
See accompanying drawing 8, show the sealed structural representation of primary superheater outlet and rear pass mid-board, the extended length of flexible seal layer 1 in level and short transverse is 250mm.
See accompanying drawing 9, show the sealed structural representation of ceiling and both walls, this embodiment carries out flexible sealing on virgin metal sealing plate 6, adopts inside and outside integral sealing mode, outer side seal 400mm, inner side all seals 300mm (extended length) in short transverse and horizontal direction.Ni-Cr-Mn steel mesh 13 can be installed additional in the flexible seal layer 1 of leaking serious position according to field condition.In addition, position, right angle can be clogged with ceramic fibre material dipping adhesive.
Each embodiment in this description all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to a kind of boiler flexible seal device provided by the utility model and method, be described in detail, apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (6)
1. a boiler flexible seal device, it is characterized in that, comprise wire netting cover layer, flexible seal layer and fixed part, wherein: described flexible seal layer comprises the ceramic fibre material layer being no less than 3 layers, bonding by adhesive between adjacent 2 layers of ceramic fibre material layer; Described wire netting cover layer covers above outermost ceramic fibre material layer; The ceramic fibre material layer of inner side is bonding with the boiler component outer surface that needs seal by adhesive; Described wire netting cover layer and flexible seal layer are fixedly attached to the boiler component needing sealing by described fixed part; Gross thickness>=the 60mm of described ceramic fibre material layer, density>=128kg/m
3, tensile strength>=70KPa, heat resisting temperature>=1000 DEG C; Adhesive strength>=the 3MPa of described adhesive, heat resisting temperature>=1000 DEG C.
2. boiler flexible seal device as claimed in claim 1, it is characterized in that, described flexible seal layer comprises 3 layers of ceramic fibre material, and the thickness of described three layers of ceramic fibre material layer is respectively 25mm, 13mm, 25mm by order from top to bottom.
3. boiler flexible seal device as claimed in claim 1, it is characterized in that, described flexible seal layer also comprises nickel chromium manganese steel stratum reticulare, and described nickel chromium manganese steel stratum reticulare is between any 2 layers of ceramic fibre material layer.
4. boiler flexible seal device as claimed in claim 1, is characterized in that: when the boiler component of described needs sealing is planar structure, described fixed part is stainless steel lag screws; The quantity of the stainless steel lag screws that every square metre of described wire netting cover layer is arranged is no less than 12, and by presetting aligned transfer; One end and the described boiler component sealed that needs of every root steel nail are fixed, and the other end is fixed through flexible seal layer and described metal nerve of a covering; When the described boiler component needing to seal is column construction, described fixed part is that stainless steel is tied up.
5. boiler flexible seal device as claimed in claim 4, it is characterized in that, described wire netting cover layer is stainless (steel) wire, and the mesh shape of described stainless (steel) wire is rhombus, square, oval or circular.
6. boiler flexible seal device as claimed in claim 1, it is characterized in that, the described boiler component of sealing that needs comprises: wall superheater, Late reworking, high temperature superheater, high temperature reheater, low temperature superheater wear push pipe position, low-temperature reheater wears ceiling position, column pipe wears ceiling position, ceiling position worn by front bag wall, front crossover sites, water-cooling wall both sides and position, roof tube junction, front-back wall and ceiling junction; Wherein: described flexible seal layer and wire netting cover layer are 250 ~ 500mm in the extended length of the boiler component horizontal direction needing sealing, are 250 ~ 700mm in short transverse extended length; Described ceramic fibre material adopts the paving mode of the individual layer fissure of displacement, interlayer tooled joint, and fissure of displacement distance is not less than 50mm, and seam crossing adopts adhesive bonding; Connected by fourth of the twelve Earthly Branches ring between described wire netting, the lap of splice is not less than 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636483.XU CN204254581U (en) | 2014-10-30 | 2014-10-30 | Boiler flexible seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636483.XU CN204254581U (en) | 2014-10-30 | 2014-10-30 | Boiler flexible seal device |
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| Publication Number | Publication Date |
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| CN204254581U true CN204254581U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420636483.XU Expired - Fee Related CN204254581U (en) | 2014-10-30 | 2014-10-30 | Boiler flexible seal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786775A (en) * | 2018-08-28 | 2018-11-13 | 湖北君集水处理有限公司 | A kind of modularization Powdered Activated Carbon regenerating furnace of flexible connection |
-
2014
- 2014-10-30 CN CN201420636483.XU patent/CN204254581U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786775A (en) * | 2018-08-28 | 2018-11-13 | 湖北君集水处理有限公司 | A kind of modularization Powdered Activated Carbon regenerating furnace of flexible connection |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171030 |