CN203559939U - Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit - Google Patents
Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit Download PDFInfo
- Publication number
- CN203559939U CN203559939U CN201320791004.7U CN201320791004U CN203559939U CN 203559939 U CN203559939 U CN 203559939U CN 201320791004 U CN201320791004 U CN 201320791004U CN 203559939 U CN203559939 U CN 203559939U
- Authority
- CN
- China
- Prior art keywords
- phase flow
- pipe
- ultra supercritical
- supercritical unit
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012071 phase Substances 0.000 title abstract 3
- 230000003134 recirculating effect Effects 0.000 title abstract 3
- 239000012808 vapor phase Substances 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000005514 two-phase flow Effects 0.000 claims description 14
- 230000008016 vaporization Effects 0.000 abstract description 2
- 238000009834 vaporization Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model discloses a recirculating pipe for reducing the vapor-phase flow and the water-phase flow of an ultra supercritical unit. The recirculating pipe for reducing the vapor-phase flow and the water-phase flow of the ultra supercritical unit is applied to a water feeding pump pipe system of a thermal power plant and comprises a pipe, wherein a water feeding pump is connected with a deaerator by the pipe; a minimum flow adjusting valve, an electric gate valve, a check valve and a throttling orifice plate are sequentially arranged between the water feeding pump and the deaerator and on the pipe; and the throttling orifice plate is fixed at an inlet of the deaerator in the pipe. The minimum flow adjusting valve, the electric gate valve and the check valve are sequentially connected to the pipe, the throttling orifice plate is additionally arranged at a connection inlet of the deaerator, the pressure of media at the rear of the minimum flow valve is increased, the vaporization degree of the water feeding medium at the rear of the minimum flow adjusting valve is reduced to the maximum extent, so that vibration of the pipe is avoided, and the washing degree of the pipe is reduced.
Description
Technical field
The utility model relates to a kind of thermal power plant feed water pump pipe-line system, specifically a kind of recirculation conduit that reduces ultra supercritical Unit Steam Water two phase flow.
Background technique
Before the safety check that the feed water pump recirculation conduit of the ultra supercritical unit in thermal power plant is exported by feed water pump, draw, enter oxygen-eliminating device after minimum flow regulating valve, the ducted pressure medium after minimum flow regulating valve is pressed slightly high than oxygen-eliminating device.In current design, one shut-off valve and check valve are only set after minimum flow regulating valve.Due to the huge throttling regulating action of minimum flow regulating valve, feedwater flow is after minimum flow regulating valve, manifold pressure can decline to a great extent, thereby causes that the later ducted water of minimum flow regulating valve vaporizes, and makes to exist in pipeline water and steam two phase flow.The appearance of two phase flow, has not only aggravated the erosion corrosion of working medium to pipeline, reduces the working life of pipeline, and very easily causes pipe vibration, has a strong impact on the safe operation in thermal power plant.
Model utility content
The utility model technical issues that need to address are to provide a kind of recirculation conduit that reduces ultra supercritical Unit Steam Water two phase flow, and it can reduce steam water two phase flow in the later pipeline of minimum flow valve in ultra supercritical unit feed-water pump.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is:
Reduce the recirculation conduit of ultra supercritical Unit Steam Water two phase flow, comprise the pipeline that is communicated with feed water pump and oxygen-eliminating device, on pipeline, minimum flow regulating valve, electric gate valve, check valve and restricting orifice are installed successively between from feed water pump to oxygen-eliminating device, described restricting orifice is fixed on the ingress of oxygen-eliminating device in pipeline.
Further improvement of the utility model is: restricting orifice comprises the base plate of upper plate with throttle orifice and a band outlet, upper plate and base plate are connected to one and between upper plate and base plate, form throttling chamber, and the outlet on throttle orifice and base plate on upper plate is staggeredly arranged.
Further improvement of the utility model is: described outlet is positioned at the central position of base plate, and throttle orifice is positioned at the periphery of upper plate.
Further improvement of the utility model is: the upper end of the upper plate of described restricting orifice is also connected with cylindrical shell, and cylindrical shell upper end is connected with land.
Further improvement of the utility model is: the ingress of described oxygen-eliminating device arranges the connecting tube of flanged dish, is also provided with corresponding flange plate on pipeline, and the land of restricting orifice is fitted between two flange plate and by connecting bolt and is fixedly connected with.
Owing to having adopted technique scheme, the technological progress that the utility model is obtained is:
The utility model is connected to minimum flow regulating valve, electric gate valve, check valve on pipeline in turn, and increase restricting orifice at the access port place of oxygen-eliminating device, improve the pressure medium after minimum flow valve, reduce to greatest extent the vaporization degree to aqueous medium after minimum flow regulating valve, thereby avoid the vibration of pipeline, reduce pipe flushing degree.
Accompanying drawing explanation
Fig. 1 is linkage structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of restricting orifice of the present utility model;
Fig. 3 is the scheme of installation of restricting orifice of the present utility model.
Wherein: 1, feed water pump, 2, minimum flow regulating valve, 3, electric gate valve, 4, check valve, 5, restricting orifice, 6, oxygen-eliminating device, 7, pipeline, 8, flange plate, 9, connecting bolt, 10, connecting tube; 51, land, 52, throttle orifice, 53, upper plate, 54, throttling chamber, 55, outlet, 56, cylindrical shell, 57, base plate.
Embodiment
Below in conjunction with accompanying drawing, as an example of " state's electricity is built and thrown the Inner Mongol first phase 2 × 660MW of Bu Lian power plant of limited energy company ultra supercritical unit engineering " example, the utility model is described in further details:
Reduce the recirculation conduit of ultra supercritical Unit Steam Water two phase flow, comprise the pipeline 7 that is communicated with steam feed pump 1 and oxygen-eliminating device 6, on pipeline 7 from feed water pump 1 to minimum flow regulating valve 2, electric gate valve 3, check valve 4 and restricting orifice 5 are installed oxygen-eliminating device 6 successively.After feedwater recirculation conduit check valve, pipeline specifications is φ 377 × 15, and pipe material is 20 steel.The design pressure of pipeline is 1.4MPa, and temperature is 198.3 ℃, and restricting orifice 5 is fixed on the ingress of the interior oxygen-eliminating device 6 of pipeline 7.Restricting orifice 5 comprises a upper plate 53 and a base plate 57, upper plate 53 and base plate 57 are connected to one and between upper plate and base plate, form throttling chamber 54, the periphery of upper plate 53 is provided with several throttle orifices 52, the central position of base plate arranges an outlet 55, throttle orifice 52 and outlet 55 segment distance that staggers, directly relatively, does not make recirculation water from throttle orifice 52 enters throttling chamber 54, in throttling chamber 54, slightly do to be detained, from exporting 55 discharges.5 of restricting orifices can form pressure drop should be less than the poor of hydraulic pressure in hydraulic pressure and the oxygen-eliminating device in the pipeline before restricting orifice 5.
Upper end at the upper plate 53 of restricting orifice 5 is also connected with cylindrical shell 56, and cylindrical shell 56 upper ends are being fixedly connected with land 51.The ingress of oxygen-eliminating device 6 arranges connecting tube 10, the upper end of connecting tube 10 is welded with flange plate 8, also after being provided with corresponding flange plate 8, two flange plate 8 docking on pipeline 7, the land of restricting orifice 5 51 is fitted between two flange plate 8, then by connecting bolt 9, is fixedly connected with.
When the feedwater recirculation conduit of ultra supercritical unit puts into operation, owing to there being the existence of restricting orifice, the pressure feeding water after minimum flow regulating valve need be greater than restricting orifice pressure drop and oxygen-eliminating device normal operating pressure sum.Feedwater in recirculation conduit is just in unsaturation state like this, thereby avoided the generation of two phase flow.
Claims (5)
1. reduce the recirculation conduit of ultra supercritical Unit Steam Water two phase flow, comprise the pipeline (7) that is communicated with feed water pump (1) and oxygen-eliminating device (6), it is characterized in that: pipeline (7) is upper from feed water pump (1) to minimum flow regulating valve (2), electric gate valve (3), check valve (4) and restricting orifice (5) are installed oxygen-eliminating device (6) successively, and described restricting orifice (5) is fixed on the ingress of the interior oxygen-eliminating device of pipeline (7) (6).
2. the recirculation conduit of reduction ultra supercritical Unit Steam Water two phase flow according to claim 1, it is characterized in that: restricting orifice (5) comprises the upper plate (53) of a band throttle orifice (52) and the base plate (57) of a band outlet (55), upper plate (53) and base plate (57) are connected to one and between upper plate and base plate, form throttling chamber (54), and the outlet (55) on throttle orifice (52) and base plate (57) on upper plate (53) is staggeredly arranged.
3. the recirculation conduit of reduction ultra supercritical Unit Steam Water two phase flow according to claim 2, is characterized in that: described outlet (55) is positioned at the central position of base plate, throttle orifice (52) is positioned at the periphery of upper plate.
4. according to the recirculation conduit of the reduction ultra supercritical Unit Steam Water two phase flow described in claim 2 or 3 any one, the upper end that it is characterized in that the upper plate (53) of described restricting orifice (5) is also connected with cylindrical shell (56), and cylindrical shell (56) upper end is connected with land (51).
5. the recirculation conduit of reduction ultra supercritical Unit Steam Water two phase flow according to claim 4, it is characterized in that the ingress of described oxygen-eliminating device (6) arranges the connecting tube (10) of flanged dish (8), on pipeline (7), be also provided with corresponding flange plate (8), the land (51) of restricting orifice (5) is fitted between two flange plate (8) and is fixedly connected with by connecting bolt (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320791004.7U CN203559939U (en) | 2013-12-05 | 2013-12-05 | Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320791004.7U CN203559939U (en) | 2013-12-05 | 2013-12-05 | Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203559939U true CN203559939U (en) | 2014-04-23 |
Family
ID=50509666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320791004.7U Expired - Lifetime CN203559939U (en) | 2013-12-05 | 2013-12-05 | Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203559939U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747808A (en) * | 2015-03-27 | 2015-07-01 | 华电重工股份有限公司 | Method for Improving Vibration of Recirculation Piping System |
-
2013
- 2013-12-05 CN CN201320791004.7U patent/CN203559939U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747808A (en) * | 2015-03-27 | 2015-07-01 | 华电重工股份有限公司 | Method for Improving Vibration of Recirculation Piping System |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104566331A (en) | Back-pressure type heat regenerative system for combined heat and power generation | |
| CN203559939U (en) | Recirculating pipe for reducing vapor-phase flow and water-phase flow of ultra supercritical unit | |
| CN204061181U (en) | A kind of novel air compressor energy recovery two times heat changing device with control valve | |
| CN205655277U (en) | Water system in small -size power plant boiler start -up | |
| CN203847903U (en) | Noise reduction system of labyrinth ring water supply pipeline of pump storage group | |
| CN204007198U (en) | A kind of water-jet exhaust device for condenser | |
| CN202451477U (en) | Jetting type heat pump without receiving chamber | |
| CN202092115U (en) | System for improving pressure of desuperheating water of superheater | |
| CN104006259A (en) | Pump storage unit labyrinth ring water supply pipe noise reduction system | |
| CN103645047A (en) | Performance testing system for ultra-large displacement safety valve | |
| CN211688281U (en) | Urea hydrolysis ammonia production steam heating system | |
| CN211474199U (en) | Low-temperature power generation device for recovering waste heat of oil refinery | |
| CN211174238U (en) | Drainage system for lower steam exhaust pipeline of low-position arranged water feeding pump steam turbine | |
| CN221462468U (en) | Booster pump based on sewage pump transformation | |
| CN209368949U (en) | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant | |
| CN205191957U (en) | System is eliminated to water hammer buffer and solar collector supply channel water hammer | |
| CN204961277U (en) | A device for reducing pump mechanical seal temperature | |
| CN205370665U (en) | Use heat recovery system at thermodynamic system of steam tur bine biserial high pressure feed water heater | |
| CN104832463A (en) | Ejector system for vacuumizing pressurized water reactor cooling agent system | |
| CN206225467U (en) | A kind of proportioning filling apparatus for alcohol water fuel cell | |
| CN203452970U (en) | High-efficiency environment-friendly hydroelectric power generation system | |
| CN202791940U (en) | Energy-saving type mobile steam supplying device | |
| CN218993372U (en) | Energy-saving transformation system for back pressure type turbine auxiliary machine of industrial self-contained power station | |
| CN202203924U (en) | A hydrogen peroxide feeding device for boiler chemical cleaning in power plants | |
| CN202942650U (en) | Circulating closed concentration tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |
|
| CX01 | Expiry of patent term |