CN201137931Y - Spray attemperator for circulating fluid bed boiler - Google Patents
Spray attemperator for circulating fluid bed boiler Download PDFInfo
- Publication number
- CN201137931Y CN201137931Y CNU2007201382278U CN200720138227U CN201137931Y CN 201137931 Y CN201137931 Y CN 201137931Y CN U2007201382278 U CNU2007201382278 U CN U2007201382278U CN 200720138227 U CN200720138227 U CN 200720138227U CN 201137931 Y CN201137931 Y CN 201137931Y
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- China
- Prior art keywords
- desuperheater
- sleeve
- barrel
- direct
- sleeve barrel
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Abstract
The utility model relates to a water spraying desuperheater which is used in a circulating fluidized bed boiler and belongs to the technical field of boiler devices and the desuperheater is used to solve the problem that the desuperheater holds pressure. The desuperheater comprises a barrel body, a sleeve barrel, a baffle plate and a jet tube, wherein the sleeve barrel is located in the barrel body and is positioned through a screw bolt, the baffle plate is located between the sleeve barrel and the barrel body, the jet tube is traversed through the sleeve barrel and the barrel body along the radial direction, and after the desuperheater is improved, the sleeve barrel is an isodiametric straight barrel shape. The desuperheater cancels a bronchia structure of the sleeve barrel of the desuperheater sleeve barrel and simultaneously improves the nozzle shape and the arranging mode of the jet tube, thereby the problems that the desuperheater holds the pressure and the temperature of a collecting box of a low temperature is over high are solved, the pressure difference of the boiler is lowered from original 1.2 to 1.3MPa ( with full load) to 0.3 to 0.4MPa, the temperature of a collecting box of a low temperature can be controlled within 440 degrees, and an operating steam turbine with limit full load is increased from original 22MW.h to 25.5MW.h.
Description
Technical field
The utility model relates to a kind of boiler component, especially for the direct-contact desuperheater of CFBB, belongs to the boiler plant technical field.
Background technology
Attemperator is the register that is used on the steam pipeline of CFBB.A kind of direct-contact desuperheater structure commonly used as shown in Figure 2, its main composition comprises stack shell 1, sleeve 3, jet pipe 2, the stack shell two ends are welded on the steam pipeline, the sleeve middle part is provided with trunnion 8, jet pipe 2 is by passing in the trunnion, high-temperature vapour is by flowing through in the sleeve, and the water that sprays in the jet pipe mixes with steam, and the big I of control injection flow rate reaches the temperature adjustment purpose.This ordinary construction attemperator is used in a kind of 130t/h CFBB (inferior high temperature, sub-high pressure, single drum horizontal formula, single burner hearth, natural circulation boiler) time, find to have following point after operation after a while: drum is too big to the pressure reduction of remittance vapour collection case, when causing the pressure of admission turbine also not reach rated pressure, drum pressure just surpasses the amount pressure of drum, even reaches the safety valve popping pressure.Because can't reach the initial steam pressure of steam turbine, have to reduce steam turbine load for safety in production, make the boiler can not oepration at full load.In addition, the serious overtemperature of low temperature superheater collection case, it is 447 ℃ that low temperature superheater calculates wall temperature, and medium temperature is 437 ℃, and low temperature superheater outlet collection oven temperature, degree reaches 480 ℃ during boiler operatiopn, brings very big potential safety hazard to production like this.At above-mentioned situation, all data of this boiler are analyzed, find the cause out on direct-contact desuperheater, the trunnion place of direct-contact desuperheater sleeve builds the pressure, cause the pressure reduction on both sides to strengthen, and all steam flow rates are significantly less than design load before causing direct-contact desuperheater, steam increases at intraductal retention time, thereby the whole overtemperatures of the jet chimney before attemperator, the low temperature superheater outlet collection case overtemperature that focuses on attemperator is the most serious.
Summary of the invention
The utility model is used to solve the defective of above-mentioned prior art and provides a kind of can effectively the elimination to build the pressure phenomenon and then improve the direct-contact desuperheater that is used for CFBB that steam turbine operation is loaded.
The alleged problem of the utility model solves by the following technical programs:
A kind of direct-contact desuperheater that is used for CFBB, comprise stack shell, sleeve, dividing plate and jet pipe in the formation, sleeve is arranged in stack shell by the bolt location, and dividing plate is between sleeve and stack shell, jet pipe radially passes sleeve and stack shell, and its special feature is: described sleeve 3 is isometrical straight-tube shape.
The above-mentioned direct-contact desuperheater that is used for CFBB, described jet pipe 2 is provided with nozzle 7, and nozzle is positioned at jet pipe on the face of gas flow direction, and nozzle form is the little outer big bellmouth in lining, and the bellmouth angle is 30 degree.
The above-mentioned direct-contact desuperheater that is used for CFBB is set up back-up ring 4, and back-up ring is positioned at bolt 6 other air-flow effect one sides that are subjected to.
The above-mentioned direct-contact desuperheater that is used for CFBB, the distance between described dividing plate 5 and the sleeve axial centre is 100～120mm.
The above-mentioned direct-contact desuperheater that is used for CFBB, described nozzle is provided with two row, 6 of every row.
The utility model produces the problem that builds the pressure at existing direct-contact desuperheater the attemperator structure is improved, the throat tubular construction of cancellation attemperator sleeve, entire sleeve is designed to isometrical straight-tube shape, for solving, improved the nozzle form and the arrangement mode of jet pipe simultaneously because of cancelling trunnion to the influence that water spray and vapor mixing are produced.Through above-mentioned improvement, efficiently solving and building the pressure and low temperature superheater outlet collection oven temperature, is spent high problem, boiler pressure reduction is reduced to 0.3～0.4Mpa by former 1.2～1.3MPa (during the band full load), low temperature superheater outlet collection oven temperature, degree can be controlled in 440 ℃, Boiler Steam is exerted oneself and is brought up to 130t/h by original 105t/h, amount oepration at full load steam turbine is increased to 25.5MW.h by 22MW.h per hour originally.As seen, adopt CFBB of the present utility model, can reduce operating cost, bring considerable economic, and eliminated potential safety hazard to enterprise.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a direct-contact desuperheater structural representation before improving;
Fig. 3 is the jet pipe schematic diagram;
Fig. 4 is the local enlarged diagram of jet pipe.
Label is expressed as follows in the accompanying drawing: 1. stack shell; 2. jet pipe; 3. sleeve; 4. back-up ring; 5. dividing plate; 6. bolt, 7. nozzle; 8. trunnion.
The specific embodiment
Referring to Fig. 1, comprise stack shell 1, sleeve 3, dividing plate 5 and jet pipe 6 in the formation of the present utility model, sleeve is arranged in stack shell, and the position of the relative stack shell of sleeve is limited by two groups of bolts, every group of three bolts, each bolt 6 is closing sleeve radially.Dividing plate is between sleeve and stack shell, and it has completely cut off the gas passage between sleeve and the stack shell.Jet pipe radially passes sleeve and stack shell, and jet pipe 2 is provided with nozzle 7.Be the solution problem that builds the pressure, the utility model is cancelled the throat tubular construction of former attemperator sleeve, and entire sleeve is designed to isometrical straight-tube shape.Throat's cancellation of sleeve, can influence the mixed effect of water spray and steam, cause thermal deviation to strengthen easily, for addressing this problem, the utility model further improves jet pipe, referring to Fig. 1, Fig. 2, Fig. 3, the nozzle of jet pipe is positioned on the gas flow face, and nozzle is provided with two row, 6 of every row, totally 12, nozzle is the little outer big bellmouth in lining, and this bellmouth angle is 30 degree.
Still referring to Fig. 1, the utility model is a stress of improving sleeve, has adjusted the position of dividing plate 5, and the distance of adjusting between rear bulkhead 5 and the sleeve axial centre is 100～120mm.In addition, set up back-up ring 4, back-up ring is positioned at the left side of bolt 6, and promptly bolt is subjected to a side of air-flow effect, and is bolt strained to reduce.
Claims (5)
1. direct-contact desuperheater that is used for CFBB, comprise stack shell, sleeve, dividing plate and jet pipe in the formation, sleeve is arranged in stack shell and is located by bolt, dividing plate is between sleeve and stack shell, jet pipe radially passes sleeve and stack shell, it is characterized in that: described sleeve (3) is isometrical straight-tube shape.
2. the direct-contact desuperheater that is used for CFBB according to claim 1, it is characterized in that: described jet pipe (2) is provided with nozzle (7), nozzle is positioned at jet pipe on the face of gas flow direction, and nozzle form is the little outer big bellmouth in lining, and the bellmouth angle is 30 degree.
3. the direct-contact desuperheater that is used for CFBB according to claim 2 is characterized in that: set up back-up ring (4), back-up ring is positioned at other air-flow effect one side that is subjected to of bolt (6).
4. according to claim 1, the 2 or 3 described direct-contact desuperheaters that are used for CFBB, it is characterized in that: the distance between described dividing plate (5) and the sleeve axial centre is 100～120mm.
5. the direct-contact desuperheater that is used for CFBB according to claim 4 is characterized in that: described nozzle is provided with two row, 6 of every row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201382278U CN201137931Y (en) | 2007-12-13 | 2007-12-13 | Spray attemperator for circulating fluid bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201382278U CN201137931Y (en) | 2007-12-13 | 2007-12-13 | Spray attemperator for circulating fluid bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201137931Y true CN201137931Y (en) | 2008-10-22 |
Family
ID=40038618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201382278U Expired - Lifetime CN201137931Y (en) | 2007-12-13 | 2007-12-13 | Spray attemperator for circulating fluid bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201137931Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103097817A (en) * | 2010-09-02 | 2013-05-08 | 西门子公司 | Line having a safety system |
| CN105526579A (en) * | 2014-09-28 | 2016-04-27 | 付开领 | Venturi desuperheater |
| CN107709880A (en) * | 2015-04-02 | 2018-02-16 | 爱默生伏尔甘控股有限责任公司 | Attemperator system |
| 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 |
-
2007
- 2007-12-13 CN CNU2007201382278U patent/CN201137931Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103097817A (en) * | 2010-09-02 | 2013-05-08 | 西门子公司 | Line having a safety system |
| CN103097817B (en) * | 2010-09-02 | 2015-04-01 | 西门子公司 | Line having a safety system |
| CN105526579A (en) * | 2014-09-28 | 2016-04-27 | 付开领 | Venturi desuperheater |
| CN107709880A (en) * | 2015-04-02 | 2018-02-16 | 爱默生伏尔甘控股有限责任公司 | Attemperator system |
| CN107709880B (en) * | 2015-04-02 | 2019-10-25 | 艾默生伏尔甘控股有限公司 | Attemperator system |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081022 |