CN107606597B - Sleeve seat type water spraying desuperheater - Google Patents
Sleeve seat type water spraying desuperheater Download PDFInfo
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- CN107606597B CN107606597B CN201710931942.5A CN201710931942A CN107606597B CN 107606597 B CN107606597 B CN 107606597B CN 201710931942 A CN201710931942 A CN 201710931942A CN 107606597 B CN107606597 B CN 107606597B
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Abstract
The invention discloses a sleeve seat type water spraying attemperator, which comprises a cylinder body, wherein an inner bushing is arranged in the cylinder body, and the cylinder body is fixedly connected with the lower end of a body tube seat. The invention improves the application range of the water spray attemperator by the sleeve seat and the nozzle reinforced protective tube which are completely sealed and provided with the outer, middle and inner three-layer pipe orifices, enhances the safety and reliability of the water spray attemperator in the operation process, has simple structure, is convenient to manufacture and assemble and is convenient to maintain.
Description
Technical Field
The invention relates to a desuperheater water spraying device, in particular to a sleeve seat type water spraying desuperheater which is used in a re-superheater system of a power station boiler.
Background
Attemperators are important devices used to regulate the steam temperature of steam boilers. In a thermal power plant, if a desuperheater is not provided, the steam temperature at the outlet of the boiler cannot be controlled within the rated range, and parts such as a steam turbine of the boiler and the like can be damaged or cause serious accidents. The regulation of the steam temperature can be divided into two main categories: flue gas side conditioning and steam side conditioning. The water spray attemperator is the main means of regulating the steam temperature on the steam side.
FIG. 1 shows a schematic structure of a single tube seat flange type water spraying attemperator device of a boiler. The thin-wall inner bushing 2 is arranged in the cylinder body 1 of the water spraying attemperator, so that the thermal shock of incompletely atomized attemperation water drops on the inner wall of the thick-wall header or the connecting pipeline is avoided, and when thicker attemperation water drops onto the inner bushing 2, the water drops are quickly gasified due to small heat accumulation inertia of the inner bushing 2, and the thermal stress generated on the inner bushing 2 is not large. The inner bushing 2 is connected with the cylinder body 1 by a fixing bolt 4 near the nozzle, the original nozzle pipe 5 is directly connected with the body pipe seat 6 by a flange connection pair, and the direction of the original nozzle pipe 5 is consistent with the direction of air flow in the cylinder body 1. The defects are that: when the device runs, the nozzle device can vibrate in a cantilever manner, the nozzle device is easy to break, the temperature reduction water is sprayed out from the break, and cracks can be formed between the inner bushing 2 and the cylinder body 1 due to temperature difference stress; and the broken nozzle head, if flowing into the hot-face tube with the air flow, may cause tube explosion. The flange connection pair consisting of the flange 7, the flange cover 8, the stud bolts 9 and the nuts 10 is liable to leak during operation of the desuperheater and is unsuitable for use in a water spray desuperheater in a high-temperature and high-pressure operation state.
The traditional sleeve seat type water spraying attemperator is formed by connecting two composite tube seats in series, each composite tube seat is provided with an inner layer of tube orifice and an outer layer of tube orifice, the nozzle reinforcing protection tube and the nozzle tube are respectively connected in series through the composite tube seats, the assembly procedure is that a layer of tube in the composite tube seat is assembled with the nozzle and the nozzle tube, the assembly assembled by the nozzle tube is sleeved into the assembly assembled by the outer layer of tube orifice of the composite tube seat and the nozzle reinforcing protection tube, and the composite sleeve seat assembled with elements such as the nozzle is welded with the attemperator body tube seat. The composite sleeve seat type water spraying attemperator formed by connecting two composite sleeve seats in series has the advantages of complex structure, low structural strength of the composite sleeve seat, low application range of design temperature and design pressure, complex assembly process and inconvenient operation.
Disclosure of Invention
The invention aims to solve the technical problems that: the sleeve seat type water spraying attemperator has the advantages of being simple in structure, convenient to assemble, convenient to maintain, good in high-temperature resistance and pressure resistance, and solving the problems that the traditional sleeve seat type water spraying attemperator is complex in structure, low in strength, low in design temperature and design pressure, complex in assembly procedure, inconvenient to operate and unsuitable for being used in the water spraying attemperator in a high-temperature high-pressure running state.
In order to solve the technical problems, the technical scheme of the invention provides a sleeve seat type water spraying attemperator, which comprises a barrel body, wherein an inner bushing is arranged in the barrel body, and the barrel body is fixedly connected with the lower end of a main body pipe seat.
Preferably, one end of the inner bushing is fixedly connected with the cylinder body in the axial direction of the attemperator through a fixing bolt, the other end of the inner bushing is a free end capable of freely expanding, and the position, which can be used for supporting and positioning in the radial direction of the inner bushing, is connected with the cylinder body through a supporting bolt.
Preferably, the lower end of the nozzle pipe is provided with a fixed positioning annular steel plate, and the fixed positioning annular steel plate is connected with the nozzle reinforcing protection pipe.
Preferably, the fixed positioning annular steel plate is a terminal fixed supporting block.
Preferably, at least one coaxial positioning steel plate is arranged between the nozzle reinforcing protective tube and the body tube seat, and the coaxial positioning steel plate and the body tube seat are coaxially fixed; the coaxial positioning steel plate and the nozzle reinforcing protection tube are uniformly distributed in the circumferential direction and welded in the same way for coaxial positioning.
Preferably, the number of nozzles is at least 1.
Preferably, the direction of the nozzle and the nozzle reinforcing protective tube is consistent with the direction of the air flow in the cylinder.
Preferably, the end part of the nozzle pipe is arranged in the inner bushing, and the cylinder body and the inner bushing are provided with openings at the position of the body pipe seat.
Preferably, the end part of the nozzle pipe is arranged outside the inner bushing, the nozzle is opposite to the opening of the inner bushing, and the cylinder body is provided with an opening at the position of the body tube seat.
Preferably, the nozzle tube is a flute-shaped tube with a blind end and a plurality of holes.
The invention adopts a sleeve seat with an outer layer of pipe orifices, an inner layer of pipe orifices and an outer layer of pipe orifices of the sleeve seat are respectively connected with the pipe orifices of the main body pipe seat, the nozzle reinforcing pipe orifice and the nozzle pipe orifice to form a combined sleeve seat with good sealing property, the sleeve seat bears high-pressure welding ports, only one layer of pipe orifices outside the sleeve seat and one butt welding port of the main body pipe seat are in butt welding ports, and the butt welding ports of the pipe orifices of the other middle layer and the inner layer are all non-pressure welding ports. The leakage defect and low-temperature low-pressure use limitation of the original flange connection mode are avoided, the structural strength of the sleeve seat is enhanced while design elements are simplified, the application range of the design temperature and the design pressure of the water spraying attemperator is improved, and the recoil force born by the nozzle reinforcing protection tube and the scouring force brought by steam are effectively transmitted to the body tube seat and the barrel body. The nozzle reinforcing protective tube can effectively protect and fix the nozzle and the nozzle tube connected with the nozzle reinforcing protective tube, strengthen the recoil force of the nozzle during operation, play a supporting role, avoid the possibility of vibration of a cantilever of the nozzle device during operation, ensure that the nozzle device is not broken, and avoid steam from directly flushing the nozzle and the nozzle tube. The invention is suitable for running at high temperature and high pressure, and has better high temperature resistance and pressure resistance. During assembly, the inner, middle and outer three-layer pipe orifices of the sleeve seat, the nozzle pipe, the nozzle reinforcing protection pipe and the attemperator body pipe seat are welded in sequence, the operation procedure is reasonable and convenient, and the assembly efficiency is improved.
The invention improves the application range of the water spray attemperator by the sleeve seat and the nozzle reinforced protective tube which are completely sealed and provided with the outer, middle and inner three-layer pipe orifices, enhances the safety and reliability of the water spray attemperator in the operation process, has simple structure, is convenient to manufacture and assemble and is convenient to maintain.
Drawings
FIG. 1 is a schematic diagram of a conventional single tube holder flanged water spray attemperator;
FIG. 2 is a schematic illustration of a sleeve-seat water spray attemperator with one end of a nozzle tube positioned within an inner liner;
FIG. 3 is a schematic view of a sleeve-seat water spray attemperator with one end of a nozzle tube outside an inner liner;
fig. 4 is a cross-sectional view of the A-A plane of fig. 3.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Example 1
The invention relates to a sleeve seat type water spray attemperator, which is shown in figure 2, and comprises a cylinder body 1, wherein an inner bushing 2 is arranged in the cylinder body 1, and the inner bushing 2 is fixed and supported and positioned on the cylinder body 1 through a fixing bolt 4 and a supporting bolt 3. One end of the inner liner 2 is fixed in the axial direction of the attemperator by a fixing bolt 4, and the other end of the inner liner 2 is a free end which can be freely expanded. The radial direction of the inner bushing 2 is supported and positioned by the support bolts 3 at other proper positions of the inner bushing 2. The cylinder body 1 and the inner bushing 2 are provided with matched openings at the corresponding positions of the body tube seat 6, the lower end of the body tube seat 6 is fixedly connected with the cylinder body 1, and the body tube seat 6 is arranged above one end of the cylinder body 1. The nozzle tube 16 is inserted into the body tube holder 6, and the tip end portion of the nozzle tube 16 is placed in the inner liner 2, and the tip end portion of the nozzle tube 16 is connected to the nozzle 14. In order to enhance the stability of the nozzle pipe 16, a fixing and positioning annular steel plate 15 for fixing the nozzle pipe 16 may be additionally arranged below the nozzle pipe 16. The outer sides of the nozzle pipe 16 and the nozzle 14 are sleeved with a nozzle reinforcing protective pipe 13, at least one coaxial positioning steel plate 17 is arranged between the outer circumferential surface of the nozzle reinforcing protective pipe 13 and the inner wall of the body pipe seat 6, the coaxial positioning steel plate 17 is coaxially fixed with the body pipe seat 6, and the coaxial positioning steel plate 17 and the nozzle reinforcing protective pipe 13 are uniformly distributed in the circumferential direction and are coaxially positioned. The upper end mouth of pipe of the sleeve seat 11 with the outer middle and inner three-layer mouth of pipe is connected with an external water spraying pipeline, the lower end of the sleeve seat 11 with the outer middle and inner three-layer mouth of pipe is coaxially arranged, and the upper end of the nozzle pipe 16, the upper end of the nozzle reinforcing protection pipe 13 and the upper end of the body pipe seat 6 are respectively communicated with the inner layer, the middle layer and the outer layer mouth of pipe of the sleeve seat 11 with the outer middle and inner three-layer mouth of pipe in sequence to form a novel sleeve seat. The lower end of the nozzle reinforcing protective tube 13 is provided with a notch so as to coaxially assemble the nozzles 14, the number of the nozzles 14 is at least 1, a plurality of nozzles 14 can be used in series according to the increase of the water spraying amount, the tail end of the nozzle 14 at the lowest stage is a blind end, the nozzle tube 16 is connected with the nozzle 14 and sleeved into the nozzle reinforcing protective tube 13 during assembly, the upper end of the nozzle tube 16 is welded with the inner layer tube orifice of the sleeve seat 11 with the middle and inner three-layer tube orifices, after shooting is qualified, the nozzle reinforcing protective tube 13 is welded with the connecting welded mouth of the middle layer tube orifice of the sleeve seat 11 with the middle and inner three-layer tube orifices, and the fixed positioning annular steel plate 15 is welded with the nozzle reinforcing protective tube 13 after effectively locking the nozzle 14, so that the nozzle 14 is not easy to fall off. The sleeve seat equipped with elements such as a nozzle 14 is sleeved into the body tube seat 6 of the desuperheater, and finally the outer tube opening of the sleeve seat 11 with the middle and inner three-layer tube openings is welded with the body tube seat 6 of the desuperheater. During assembly, the direction of the nozzle 14 and the direction of the nozzle reinforcing protective tube 13 are ensured to be consistent with the direction of air flow in the cylinder body 1.
The lower end of the sleeve seat 11 with the outer middle and inner three layers of nozzles is coaxially provided with the three layers of nozzles which are staggered layer by layer, so that the sleeve seat is convenient to be communicated with the nozzle of the nozzle pipe 16, the nozzle of the nozzle reinforcing protection pipe 13 and the nozzle of the body tube seat 6 from inside to outside in sequence for welding assembly and flaw detection shooting.
Example 2
As shown in fig. 3 and 4, in the present embodiment, the tip end portion of the nozzle pipe 16 is located inside the cylinder 1 and outside the inner liner 2, and is a blind end, and a plurality of holes are formed in the tip end portion to form a flute-shaped tubular nozzle 14. The coaxially positioned steel plate 17 may be replaced with a projection of the outer circumferential surface of the nozzle reinforcing guard tube 13.
Otherwise, the same as in example 1 was used.
Claims (10)
1. The utility model provides a sleeve seat formula water spray desuperheater, includes barrel (1), is equipped with inner liner (2) in barrel (1), the barrel (1) is connected fixedly with the lower extreme of body tube socket (6), its characterized in that, body tube socket (6) inside coaxial nozzle reinforcing protection tube (13) and nozzle pipe (16) that are equipped with, the outside of nozzle pipe (16) is located to nozzle reinforcing protection tube (13) cover, body tube socket (6) upper end, nozzle reinforcing protection tube (13) upper end and nozzle pipe (16) upper end are linked together with the outside of the three-layer mouth of pipe (11) lower extreme in the outband respectively in proper order, the upper end mouth of pipe of the three-layer mouth of pipe (11) in the outband meets with outside spray pipe, the tip portion of nozzle pipe (16) is located in barrel (1), be equipped with nozzle (14) on the tip of nozzle pipe (16).
2. A water jet desuperheater of a casing base type according to claim 1, characterized in that one end of the inner bushing (2) is fixedly connected with the cylinder (1) in the axial direction of the desuperheater by a fixing bolt (4), the other end of the inner bushing (2) is a free end which can be freely expanded, and the position of the inner bushing (2) which can be supported and positioned in the radial direction is connected with the cylinder (1) by a supporting bolt (3).
3. A telescopic water spray attemperator according to claim 1, characterized in that the lower end of the nozzle pipe (16) is provided with a fixed positioning annular steel plate (15), the fixed positioning annular steel plate (15) being connected with the nozzle reinforcing protection pipe (13).
4. A telescopic water jet desuperheater according to claim 3, characterized in that the fixed positioning ring-shaped steel plate (15) is a terminal fixed support block.
5. A sleeve-seat type water spray attemperator as claimed in claim 1, wherein at least one coaxial positioning steel plate (17) is placed between the nozzle reinforcing protection tube (13) and the body tube seat (6), and the coaxial positioning steel plate (17) is coaxially fixed with the body tube seat (6); the coaxial positioning steel plate (17) and the nozzle reinforcing protection tube (13) are uniformly distributed in the circumferential direction and welded and coaxially positioned.
6. A cartridge-type water spray attemperator as claimed in claim 1, wherein said number of nozzles (14) is at least 1.
7. A telescopic water spray desuperheater according to claim 1, characterized in that the direction of the nozzle (14) and the nozzle reinforcing protection tube (13) is consistent with the direction of the air flow in the cylinder (1).
8. A telescopic water jet desuperheater as claimed in claim 1, characterized in that the tip of the nozzle pipe (16) is arranged in the inner liner (2), and the cylinder (1) and the inner liner (2) are provided with openings at the position of the body pipe seat (6).
9. A telescopic water spray desuperheater according to claim 1, characterized in that the tip of the nozzle pipe (16) is arranged outside the inner lining (2), the nozzle (14) is directed towards the opening of the inner lining (2), and the cylinder (1) is provided with openings at the position of the body pipe seat (6).
10. A telescopic water jet desuperheater as claimed in claim 1, characterized in that the nozzle pipe (16) is a blind-ended perforated flute-like tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710931942.5A CN107606597B (en) | 2017-10-09 | 2017-10-09 | Sleeve seat type water spraying desuperheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710931942.5A CN107606597B (en) | 2017-10-09 | 2017-10-09 | Sleeve seat type water spraying desuperheater |
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| Publication Number | Publication Date |
|---|---|
| CN107606597A CN107606597A (en) | 2018-01-19 |
| CN107606597B true CN107606597B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710931942.5A Active CN107606597B (en) | 2017-10-09 | 2017-10-09 | Sleeve seat type water spraying desuperheater |
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| CN (1) | CN107606597B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345467A (en) * | 2019-07-31 | 2019-10-18 | 上海锅炉厂有限公司 | A kind of desuperheater internal cover drum supporting device and installation method |
| CN110425514A (en) * | 2019-08-22 | 2019-11-08 | 威立雅（哈尔滨）热电有限公司 | Superheated steam temperature reduction device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201662056U (en) * | 2009-11-30 | 2010-12-01 | 上海锅炉厂有限公司 | Water spraying device of desuperheater |
| CN201724207U (en) * | 2010-04-09 | 2011-01-26 | 上海锅炉厂有限公司 | Spray attemperator with improved liner structure |
| CN102588947A (en) * | 2012-02-29 | 2012-07-18 | 哈尔滨锅炉厂有限责任公司 | Temperature reducer of 350MW tangential firing supercritical boiler reheater and temperature reducing method of temperature reducer |
| CN102650425A (en) * | 2012-05-30 | 2012-08-29 | 上海锅炉厂有限公司 | Composite bushing type water spraying desuperheater |
| CN202769637U (en) * | 2012-06-22 | 2013-03-06 | 上海锅炉厂有限公司 | Composite bushing type direct contact desuperheater |
| CN207514891U (en) * | 2017-10-09 | 2018-06-19 | 上海锅炉厂有限公司 | A kind of casing A seating direct-contact desuperheater |
-
2017
- 2017-10-09 CN CN201710931942.5A patent/CN107606597B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201662056U (en) * | 2009-11-30 | 2010-12-01 | 上海锅炉厂有限公司 | Water spraying device of desuperheater |
| CN201724207U (en) * | 2010-04-09 | 2011-01-26 | 上海锅炉厂有限公司 | Spray attemperator with improved liner structure |
| CN102588947A (en) * | 2012-02-29 | 2012-07-18 | 哈尔滨锅炉厂有限责任公司 | Temperature reducer of 350MW tangential firing supercritical boiler reheater and temperature reducing method of temperature reducer |
| CN102650425A (en) * | 2012-05-30 | 2012-08-29 | 上海锅炉厂有限公司 | Composite bushing type water spraying desuperheater |
| CN202769637U (en) * | 2012-06-22 | 2013-03-06 | 上海锅炉厂有限公司 | Composite bushing type direct contact desuperheater |
| CN207514891U (en) * | 2017-10-09 | 2018-06-19 | 上海锅炉厂有限公司 | A kind of casing A seating direct-contact desuperheater |
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| CN107606597A (en) | 2018-01-19 |
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