CN110906309A - Nozzle tube panel device with angle for water-cooling wall of spiral tube ring - Google Patents
Nozzle tube panel device with angle for water-cooling wall of spiral tube ring Download PDFInfo
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- CN110906309A CN110906309A CN201911227242.3A CN201911227242A CN110906309A CN 110906309 A CN110906309 A CN 110906309A CN 201911227242 A CN201911227242 A CN 201911227242A CN 110906309 A CN110906309 A CN 110906309A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
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Abstract
A spout tube panel device for a spiral tube ring water-cooling wall with an angle belongs to the technical field of boiler spout tube panel manufacturing, and mainly aims to solve the problems that a 1000MW ultra-supercritical pi-shaped boiler water-cooling wall is arranged by adopting a vertical tube ring and a wall type double-tangent circular burner, working medium flow is unstable, heat deviation among tubes is large, a water-cooling wall deforms, over-temperature leakage and the like under the working condition of low-load operation of the vertical tube ring.
Description
Technical Field
The invention belongs to the technical field of boiler nozzle tube panel manufacturing, and particularly relates to a nozzle tube panel device with an angle for a spiral tube coil water-cooling wall.
Background
The ultra-supercritical power generation technology is a new generation technology for upgrading and upgrading the power industry in China and reducing the technical and equipment gap between the ultra-supercritical power generation technology and developed countries, and an ultra-supercritical power generation unit is a main unit form for power industry production in China in the future. The development of the ultra-supercritical power generation technology is the most practical and rapid way to form the capability of providing a new generation of main equipment for the power industry of China in a short time and realize clean coal power generation in a standardized way. With the continuous and rapid development of economy in China, the demand on the electric power market is increased, so that the active development of a 1000MW ultra-supercritical boiler with high efficiency and energy conservation is imperative.
The water-cooled wall of the existing 1000MW ultra-supercritical pi-shaped furnace is arranged by adopting a vertical tube ring and a wall type double-tangent circular burner, and the vertical tube ring has the problems of unstable working medium flow, large thermal deviation between tubes, deformation of the water-cooled wall, over-temperature leakage and the like under the low-load operation working condition.
Disclosure of Invention
The invention provides a nozzle tube panel device for a spiral tube ring water-cooled wall with an angle, aiming at solving the problems that a 1000MW ultra-supercritical pi-shaped furnace water-cooled wall adopts a vertical tube ring and a wall type double-tangent circular burner, and the vertical tube ring has unstable working medium flow, large thermal deviation between tubes, water-cooled wall deformation, over-temperature leakage and the like under the working condition of low-load operation.
A spout tube panel device with an angle for a water-cooling wall of a spiral tube ring comprises a curved tube panel group, a comb-shaped plate, a flange plate and two sealing plates;
the curved tube panel group comprises an upper tube panel, a middle tube panel and a lower tube panel, the upper tube panel, the middle tube panel and the lower tube panel are sequentially arranged from top to bottom, the contact part of the middle tube panel with the upper tube panel and the lower tube panel is connected through continuous spot welding, a comb-shaped plate is fixedly connected to the lower tube panel, a flange plate is fixedly connected to the bent tubes of the upper tube panel and the lower tube panel, a first bent tube group, a second bent tube group, a third bent tube group, a fourth bent tube group, a fifth bent tube group and a sixth bent tube group are all arranged on the middle tube panel, each bent tube group is formed by spirally bending a plurality of tubes in the middle tube panel, and the comb-shaped plate is fixedly connected to the upper tube panel, the middle tube panel and the lower tube panel;
the curved tube panel group is arranged along an angle a with the horizontal line, the comb-shaped plate is fixedly connected to the curved tube panel group, the flange plate is fixedly connected to the curved tube panel group through bolts, each sealing plate is arranged on one side of the flange plate, one end of each sealing plate is fixedly connected with one side of the flange plate, the other end of each sealing plate is fixedly connected with a steel plate closest to the sealing plate, and an included angle between the central line of a nozzle formed on the second curved tube panel group and the vertical direction of the water-cooled wall is an angle b;
furthermore, the first elbow pipe group comprises eight groups of elbow pipes, each eight elbow pipe is a group, the diameter of the cross section of each group of eight elbow pipes is 38mm, the eight groups of elbow pipes are averagely divided into two parts, the two parts are horizontally arranged up and down, the lengths of the upper elbow pipe from inside to outside are 5514mm, 5729mm, 5957mm and 6179mm respectively, and the lengths of the lower elbow pipe from inside to outside are 5829mm, 6042mm, 6262mm and 6446mm respectively;
further, the second elbow group comprises sixteen groups of elbows, each eight elbow group is a group, the diameter of the cross section of the eight elbows in each group is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are horizontally arranged up and down oppositely, the lengths of the upper elbows from inside to outside are 4692mm, 4926mm, 5112mm, 5314mm, 5535mm, 5733mm, 5933mm and 6131mm respectively, and the lengths of the lower elbows from inside to outside are 4999mm, 5222mm, 5454mm, 5660mm, 6157mm, 6357mm, 6555mm and 6755mm respectively;
furthermore, the third elbow group comprises sixteen groups of elbows, each eight elbow group is a group, the diameter of the cross section of the eight elbows in each group is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are horizontally arranged up and down oppositely, the lengths of the upper elbows from inside to outside are 4958mm, 5180mm, 5416mm, 5314mm, 5960mm, 6159mm, 6356mm and 6555mm respectively, and the lengths of the lower elbows from inside to outside are 4650mm, 4880mm, 5061mm, 5259mm, 5483mm, 5681mm, 5881mm and 6079mm respectively;
furthermore, the fourth bend pipe group comprises twenty-three groups of bend pipes, each group of the eight bend pipes is a group, the cross section diameter of each group of the eight bend pipes is 38mm, each group of the twenty-three groups of the bend pipes is divided into three parts which are horizontally arranged from top to bottom, the first part comprises 8 groups of bend pipes, the lengths of each group of the bend pipes from inside to outside are 4434mm, 4623mm, 4843mm, 5056mm, 5256mm, 5476mm, 5674mm and 5872mm respectively, the second part comprises 8 groups of the bend pipes, the lengths of each group of the bend pipes from inside to outside are 4435mm, 5403mm, 5604mm, 5803mm, 6001mm, 6200mm, 6399mm and 6598mm respectively, the third part comprises 7 groups of the bend pipes, and the lengths of each group of the bend pipes from inside to outside are 4434mm, 5197mm, 5424mm, 6414mm, 6625mm, 6823mm and 7021mm respectively;
further, the fifth elbow group comprises sixteen groups of elbows, each eight elbow is one group, the diameter of the cross section of each group of eight elbows is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are horizontally arranged up and down oppositely, the lengths of the upper elbows from inside to outside are 4984mm, 5199mm, 5427mm, 5619mm, 6158mm, 6356mm, 6555mm and 6754mm respectively, and the lengths of the lower elbows from inside to outside are 4676mm, 4914mm, 5109mm, 5322mm, 5535mm, 5734mm, 5932mm and 6132mm respectively;
further, the sixth elbow group comprises eight groups of elbows, each eight elbow group is one group, the diameter of the cross section of each group of eight elbows is 38mm, the eight groups of elbows are averagely divided into two parts, the two parts are arranged horizontally and oppositely, the lengths of the upper elbows from inside to outside are 5388mm, 5606mm, 5833mm and 6041mm respectively, and the lengths of the lower elbows from inside to outside are 5701mm, 5925mm, 6149mm and 6348mm respectively.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the existing device, the device provided by the invention changes the nozzle tube panel of the vertical tube coil water-cooled wall of the prior 1000MW ultra-supercritical boiler into the nozzle tube panel of the spiral tube coil water-cooled wall, and the nozzle and the water-cooled wall form a certain included angle, thereby fully playing the characteristics of the spiral water-cooled wall, ensuring stable working medium flow and small inter-tube heat under the working condition of low load operation, and effectively preventing the problems of deformation and over-temperature leakage of the water-cooled wall.
2. Compared with the existing device, the device provided by the invention has the advantages that the plurality of bent pipes are added in the existing nozzle device, the original nozzle is divided into a plurality of small nozzles, the nozzle device is ensured to form a uniform aerodynamic field and heat load distribution, and the deviation between the temperature field of the flue gas at the outlet of the hearth and the temperature of the working medium at the outlet of the water-cooled wall is reduced.
3. Compared with the existing device, the device provided by the invention has the advantages that the heat absorption deviation between adjacent tubes in the curved tube panel is small, the combustion interference resistance is strong, the distribution throttling ring at the inlet of the water-cooled wall can not be arranged, the assembly process is reduced, the device is suitable for the requirement of variable pressure operation of the boiler, and the sufficient mass flow rate can be maintained under low load.
Drawings
FIG. 1 is a schematic isometric view of a curvilinear tube panel assembly of the present invention;
FIG. 2 is a schematic top view of a panel assembly of the present invention;
FIG. 3 is a schematic view showing the structure of a flange plate and a sealing plate according to the present invention;
FIG. 4 is a front view of the present invention;
FIG. 5 is a side view of the panel assembly of the present invention;
FIG. 6 is a schematic top view of the position distribution of the present invention in a double-tangential boiler plant.
In the figure, 1 an upper tube panel, 2 a middle tube panel, 3 a lower tube panel, 4 comb plates, 5 flange plates, 6 sealing plates, 7 a first bent tube group, 8 a second bent tube group, 9 a third bent tube group, 10 a fourth bent tube group, 11 a fifth bent tube group and 12 a sixth bent tube group.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 5, and the angled spout tube panel device for the water-cooled wall of the spiral tube coil comprises a curved tube panel group, a comb-shaped plate 4, a flange plate 5 and two sealing plates 6;
the curved tube panel group comprises an upper tube panel 1, a middle tube panel 2 and a lower tube panel 3, the upper tube panel 1, the middle tube panel 2 and the lower tube panel 3 are sequentially arranged from top to bottom, the contact part of the middle tube panel 2 with the upper tube panel 1 and the lower tube panel 3 is connected through continuous spot welding, a comb-shaped plate 4 is fixedly connected onto the lower tube panel 3, a flange plate 5 is fixedly connected onto the bent tubes of the upper tube panel 1 and the lower tube panel 3, a first bent tube group 7, a second bent tube group 8, a third bent tube group 9, a fourth bent tube group 10, a fifth bent tube group 11 and a sixth bent tube group 12 are all arranged on the middle tube panel 2, each bent tube group is formed by spirally bending a plurality of tubes in the middle tube panel 2, and the comb-shaped plate is fixedly connected onto the upper tube panel, the middle tube panel and the lower tube panel;
the utility model discloses a water-cooled wall, including curved tube panel group, comb-shaped plate 4 rigid coupling, flange plate 5, every closing plate 6, the spout central line that curved tube panel group was followed and is a angle with water flat line and arranges, 4 rigid couplings of comb-shaped plate are on curved tube panel group, flange plate 5 passes through the bolt rigid coupling on curved tube panel group, every closing plate 6 sets up the one side at flange plate 5, the one end of every closing plate 6 and one side fixed connection of flange plate 5, the other end of every closing plate 6 and apart from its nearest steel sheet fixed connection, the spout central line that forms is the angle b with the.
In this embodiment, the curve tube panel group is along being the angle a with the water flat line and arranging, the angle at angle a is 23.391, the spout central line that forms on the curve tube panel group is the angle b with the contained angle of water-cooling wall vertical direction, the angle at angle b is 27, pass through the band steel between the adjacent curve tube in the curve tube panel group, billet and round steel are connected and are sealed the spout tube panel that forms the ultra supercritical boiler of 1000MW, be equipped with two spouts on every 1000MW ultra supercritical boiler's the four sides wall respectively, and two spouts set up relatively, the spout excircle is fixed through annular steel and band steel in the curve tube panel group.
In this embodiment, the contact points of the middle tube panel 2 and the upper and lower tube panels 1 and 3 are connected by continuous spot welding, so that the connection is convenient for adjustment during installation by workers.
The second embodiment is as follows: the present embodiment is described with reference to fig. 5, and is further limited to the first elbow group 7 according to the second embodiment, in the present embodiment, the first elbow group 7 includes eight groups of elbows, each eight elbow group is a group, the cross-sectional diameter of each group of eight elbows is 38mm, the eight groups of elbows are equally divided into two parts, the two parts are horizontally arranged, the lengths of the upper elbows from inside to outside are 5514mm, 5729mm, 5957mm and 6179mm, and the lengths of the lower elbows from inside to outside are 5829mm, 6042mm, 6262mm and 6446 mm. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: the second bending pipe group 8 according to the second embodiment is further defined with reference to fig. 5, in this embodiment, the second bending pipe group 8 includes sixteen groups of bending pipes, each group of eight bending pipes is a group, the cross-sectional diameter of each group of eight bending pipes is 38mm, the sixteen groups of bending pipes are equally divided into two parts, the two parts are horizontally arranged up and down, the lengths of the upper bending pipe from inside to outside are 4692mm, 4926mm, 5112mm, 5314mm, 5535mm, 5733mm, 5933mm and 6131mm, and the lengths of the lower bending pipe from inside to outside are 4999mm, 5222mm, 5454mm, 5660mm, 6157mm, 6357mm, 6555mm and 6755mm, respectively. Other components and connection modes are the same as those of the first embodiment.
The fourth concrete implementation mode: the third elbow group 9 according to the fourth embodiment is further defined with reference to fig. 5, in the present embodiment, the third elbow group 9 includes sixteen groups of elbows, each of the eight elbows is a group, the cross-sectional diameter of each of the eight elbows in each group is 38mm, the sixteen groups of elbows are equally divided into two parts, the two parts are horizontally arranged, the lengths of the upper elbows from inside to outside are 4958mm, 5180mm, 5416mm, 5314mm, 5960mm, 6159mm, 6356mm and 6555mm, the lengths of the lower elbows from inside to outside are 4650mm, 4880mm, 5061mm, 5259mm, 5483mm, 5681mm, 5881mm and 6079mm, respectively. Other components and connection modes are the same as those of the first embodiment.
The fifth concrete implementation mode: referring to FIG. 5, this embodiment is further limited to the fourth elbow set 10 according to the fifth embodiment, in this embodiment, the fourth elbow set 10 includes twenty-three groups of elbows, each of the eight elbows is a group, the cross-sectional diameter of each group of eight elbows is 38mm, the twenty-three groups of elbows are divided into three parts which are horizontally arranged from top to bottom, the first part includes eight groups of elbows, the lengths of each group of elbows from inside to outside are 4434mm, 4623mm, 4843mm, 5056mm, 5256mm, 5476mm, 5674mm and 5872mm, the second part includes 8 groups of elbows, the lengths of each group of elbows from inside to outside are 4435mm, 5403mm, 5604mm, 5803mm, 6001mm, 6200mm, 6399mm and 6598mm, the third part includes 7 groups of elbows, the lengths of each group of elbows from inside to outside are 4434mm, 5403mm, 5424mm, 5114 mm, 5424mm, 6625mm and 6425 mm respectively, 6823mm and 7021 mm. Other components and connection modes are the same as those of the first embodiment.
The sixth specific implementation mode: the fifth bending pipe group 11 according to the fourth embodiment is further defined with reference to fig. 5, in the present embodiment, the fifth bending pipe group 11 includes sixteen groups of bending pipes, each group of eight bending pipes is a group, the cross-sectional diameter of each group of eight bending pipes is 38mm, the sixteen groups of bending pipes are equally divided into two parts, the two parts are horizontally arranged up and down, the lengths of the upper bending pipe from inside to outside are 4984mm, 5199mm, 5427mm, 5619mm, 6158mm, 6356mm, 6555mm and 6754mm, the lengths of the lower bending pipe from inside to outside are 4676mm, 4914mm, 5109mm, 5322mm, 5535mm, 5734mm, 5932mm and 6132mm, respectively. Other components and connection modes are the same as those of the first embodiment.
The seventh embodiment: the sixth bending pipe group 12 according to the fourth embodiment is further defined with reference to fig. 5, in the present embodiment, the sixth bending pipe group 12 includes eight groups of bending pipes, each group of eight bending pipes is a group, the cross-sectional diameter of each group of eight bending pipes is 38mm, the eight groups of bending pipes are equally divided into two parts, the two parts are horizontally arranged, the upper bending pipe is 5388mm, 5606mm, 5833mm and 6041mm long from inside to outside, and the lower bending pipe is 5701mm, 5925mm, 6149mm and 6348mm long from inside to outside. Other components and connection modes are the same as those of the first embodiment.
It can be seen from the above detailed description that when the elbow groups are arranged from top to bottom, each elbow in the elbow groups is sequentially arranged at an angle a with the horizontal plane along the length direction of the elbow, the more elbows are arranged in the elbow group closer to the center, the smaller elbows are arranged in the elbow group closer to the two ends, the reason is that when the working medium and the flue gas are dispatched along the nozzle, the temperature of the flue gas passing through the middle part of the nozzle and the temperature of the working medium are higher than the temperature of the flue gas passing through the two ends and the temperature of the working medium, the prior nozzle device is divided to ensure that the nozzle device forms uniform aerodynamic field and heat load distribution, reduce the deviation between the temperature field of the flue gas at the outlet of the hearth and the temperature of the working medium at the outlet of the water-cooled wall, therefore, the number of the pipes in the elbow pipe group positioned in the middle of the nozzle is increased, and the increased thickness is used for better absorbing the temperature of the flue gas and the working medium discharged through the middle of the nozzle, so that the temperature uniformity of the flue gas and the working medium flowing through each area in the nozzle device is ensured.
The present invention is not limited to the above embodiments, and any person skilled in the art can make many modifications and equivalent variations by using the above-described structures and technical contents without departing from the scope of the present invention.
Claims (7)
1. The utility model provides a spout tube panel device that is used for coil water-cooling wall area angle, its characterized in that: the nozzle tube panel device comprises a curve tube panel group, a comb-shaped plate (4), a flange plate (5) and two sealing plates (6);
the curved tube panel group comprises an upper tube panel (1), a middle tube panel (2) and a lower tube panel (3), the upper tube panel (1), the middle tube panel (2) and the lower tube panel (3) are sequentially arranged from top to bottom, the middle tube panel (2) is connected with the contact part of the upper tube panel (1) and the lower tube panel (3) through continuous spot welding, a comb-shaped plate (4) is fixedly connected onto the lower tube panel (3), a flange plate (5) is fixedly connected onto the bent tubes of the upper tube panel (1) and the lower tube panel (3), a first bent tube group (7), a second bent tube group (8), a third bent tube group (9), a fourth bent tube group (10), a fifth bent tube group (11) and a sixth bent tube group (12) are arranged on the middle tube panel (2), each bent tube group is formed by spirally bending a plurality of tubes in the middle tube panel (2), and the comb-shaped plate (4) is fixedly connected onto the upper tube panel (1), A middle tube panel (2) and a lower tube panel (3),
the utility model discloses a water-cooled wall of a water-cooled wall, including curved tube panel group, comb plate (4) rigid coupling, flange plate (5) pass through the bolt rigid coupling on curved tube panel group, every closing plate (6) set up the one side at flange plate (5), the one end of every closing plate (6) and one side fixed connection of flange plate (5), the other end of every closing plate (6) and its nearest steel sheet fixed connection apart from, the spout central line that forms on the curved tube panel group is the b angle with the contained angle of water-cooled wall vertical direction.
2. The nozzle tube panel device with the angle for the water-cooled wall of the spiral tube ring as claimed in claim 2, wherein: the first elbow pipe group (7) comprises eight groups of elbow pipes, each eight elbow pipe is a group, the diameter of the section of each group of eight elbow pipes is 38mm, the eight groups of elbow pipes are averagely divided into two parts, the two parts are horizontally arranged up and down, the lengths of the upper elbow pipe from inside to outside are 5514mm, 5729mm, 5957mm and 6179mm respectively, and the lengths of the lower elbow pipe from inside to outside are 5829mm, 6042mm, 62mm and 6446mm respectively.
3. The angled nozzle tube panel assembly for the water-cooled wall of the coil of a spiral tube as claimed in claim 3, wherein: the second elbow group (8) comprises sixteen groups of elbows, each eight elbow group is a group, the section diameter of the eight elbows in each group is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are horizontally arranged up and down oppositely, the lengths of the upper elbows from inside to outside are 4692mm, 4926mm, 5112mm, 5314mm, 5535mm, 5733mm, 5933mm and 6131mm respectively, and the lengths of the lower elbows from inside to outside are 4999mm, 5222mm, 5454mm, 5660mm, 6157mm, 6357mm, 6555mm and 6755mm respectively.
4. The angled nozzle tube panel assembly for the water-cooled wall of the coil of the spiral tube as set forth in claim 4, wherein: the third elbow group (9) comprises sixteen groups of elbows, each eight elbow is one group, the section diameter of the eight elbows in each group is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are arranged horizontally and oppositely, the lengths of the upper elbow from inside to outside are 4958mm, 5180mm, 5416mm, 5314mm, 5960mm, 6159mm, 5056mm and 6555mm respectively, and the lengths of the lower elbow from inside to outside are 4650mm, 4880mm, 5061mm, 5259mm, 5483mm, 5681mm, 5881mm and 6379 mm respectively.
5. The nozzle tube panel device with the angle for the water-cooled wall of the spiral tube ring as claimed in claim 5, wherein: the fourth elbow group (10) comprises twenty-three groups of elbows, each eight elbow group is a group, the section diameter of each group of eight elbows is 38mm, the twenty-three groups of elbows are divided into three parts which are horizontally arranged from top to bottom, the first part comprises 8 groups of elbows, the length of each group of elbows from inside to outside is 4434mm, 4623mm, 4843mm, 5056mm, 5256mm, 5476mm, 5674mm and 5872mm respectively, the second part comprises 8 groups of elbows, the length of each group of elbows from inside to outside is 4435mm, 5403mm, 5604mm, 5803mm, 6001mm, 6200mm, 6399mm and 6598mm respectively, the third part comprises 7 groups of elbows, and the length of each group of elbows from inside to outside is 4434mm, 5197mm, 5424mm, 6414mm, 6625mm, 6823mm and 7021mm respectively.
6. The nozzle tube panel device with the angle for the water-cooled wall of the spiral tube ring as claimed in claim 1, wherein: the fifth elbow group (11) comprises sixteen groups of elbows, each eight elbow is a group, the cross-section diameter of the eight elbows in each group is 38mm, the sixteen groups of elbows are averagely divided into two parts, the two parts are horizontally arranged up and down oppositely, the lengths of the upper elbows from inside to outside are 4984mm, 5199mm, 5427mm, 5619mm, 6158mm, 6356mm, 6555mm and 6754mm respectively, and the lengths of the lower elbows from inside to outside are 4676mm, 4914mm, 5109mm, 5322mm, 5535mm, 5734mm, 5932mm and 6132mm respectively.
7. The nozzle tube panel device with the angle for the water-cooled wall of the spiral tube ring as claimed in claim 1, wherein: the sixth bent pipe group (12) comprises eight groups of bent pipes, each eight bent pipe is a group, the diameter of the cross section of each group of eight bent pipes is 38mm, the eight groups of bent pipes are averagely divided into two parts, the two parts are arranged horizontally and oppositely, the lengths of the upper bent pipe from inside to outside are 5388mm, 5606mm, 5833mm and 6041mm respectively, and the lengths of the lower bent pipe from inside to outside are 5701mm, 5925mm, 6149mm and 6348mm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911227242.3A CN110906309B (en) | 2019-12-04 | 2019-12-04 | Nozzle tube panel device with angle for water-cooling wall of spiral tube ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911227242.3A CN110906309B (en) | 2019-12-04 | 2019-12-04 | Nozzle tube panel device with angle for water-cooling wall of spiral tube ring |
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| CN110906309A true CN110906309A (en) | 2020-03-24 |
| CN110906309B CN110906309B (en) | 2021-07-20 |
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| CN201911227242.3A Active CN110906309B (en) | 2019-12-04 | 2019-12-04 | Nozzle tube panel device with angle for water-cooling wall of spiral tube ring |
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Cited By (1)
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| CN112815294A (en) * | 2021-02-02 | 2021-05-18 | 哈尔滨锅炉厂有限责任公司 | Novel boiler membrane type wall tube panel space behavior size positioning tool and method |
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| CN110906309B (en) | 2021-07-20 |
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