CN204573990U - Height adds urgent Draining hook ease vapour system - Google Patents
Height adds urgent Draining hook ease vapour system Download PDFInfo
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- CN204573990U CN204573990U CN201520244075.4U CN201520244075U CN204573990U CN 204573990 U CN204573990 U CN 204573990U CN 201520244075 U CN201520244075 U CN 201520244075U CN 204573990 U CN204573990 U CN 204573990U
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- urgent
- height
- hydrophobic
- ease
- drain valve
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Abstract
The utility model discloses and a kind of highly add urgent Draining hook ease vapour system, comprise height and add urgent hydrophobic ease vapour device; Its cylindrical shell upper surface is provided with ease steam ports, and cylindrical shell lower surface is provided with hydrophobic discharge outlet; Be provided with several height in the middle part of cylindrical shell and add urgent hydrophobic water inlet pipe.High-pressure heater also adds urgent drain valve by height and adds urgent hydrophobic water inlet pipe with height and be connected; Height is added urgent hydrophobic ease vapour device and is connected with the inlet end of oxygen-eliminating device by ease steam ports; Height is added urgent hydrophobic ease vapour device and is connected with the water inlet end of oxygen-eliminating device by hydrophobic discharge outlet.The outlet pressure of the urgent drain valve of pressure heater is brought up to 1MPa by 0.005MPa by the utility model, and after the urgent drain valve of high-pressure heater, in pipe, the flow velocity range of decrease of steam water two phase flow is then 99.6%, 99.6%, 99.8% respectively; Reduce significantly steam water two phase flow to the erosive wear degree of urgent valve plug of drain valve and valve seat, extend the service life of urgent drain valve, improve the tightness of urgent drain valve.
Description
Technical field
The utility model relates to the urgent draining system of high-pressure heater, and more particularly it is high-pressure heater urgent Draining hook ease vapour system.
Background technology
In the investigation of thermal power plant, find that the containment vessel temperature of the urgent drain water piping of some unit high-pressure heaters is higher, illustrate that high-pressure heater urgent draining system leakage phenomenon is comparatively general.
The fired power generating unit of China's comparatively early design adopts vertical high pressure heater (as shown in Figure 1), be arranged in steam turbine building, urgent drain water piping set by each high-pressure heater is merged into a urgent drain water piping and is connected to the regular unloading container being arranged in boiler area after urgent drain valve, when its function is the vapour side water level superelevation when high-pressure heater, during the tube brakes of particularly high-pressure heater, open urgent drain valve fast, reduce high-pressure heater water level, occur through the accident of extraction line refluence admission turbine to avoid hydrophobic (feedwater).After the valve of the urgent drain valve of high-pressure heater of design like this, pipeline is long, and is two phase flow, very easily vibrates.Afterwards, by merge urgent drain water piping nearby reconfiguration to the drainage pipeline of condenser recirculated water.
After the eighties stone transverse electric factory introduces the designing technique of 300MW and 600MW unit produced in USA and study EBASCO company (as shown in Figure 2), high-pressure heater mostly is horizontal, is arranged in deaerator bay, the urgent drain water piping of each high-pressure heater is also no longer merged into a urgent drain water piping after urgent drain valve, but causes the urgent hydrophobic development unit of the high-pressure heater being arranged in steam turbine building and condenser UNICOM (or causing the knapsack type hydrophobic development unit arranging condenser separately) separately.300MW and above capacity unit (comprise and adopt the 1000MW unit of single-row high-pressure heater) the urgent drain valve of high-pressure heater must be arranged near the urgent hydrophobic development unit of high-pressure heater, to prevent the pipe vibration caused by steam water two phase flow.Usually, the maintenance vacuum isolating valve often opened is established in the downstream of the urgent drain valve of high-pressure heater, but this isolating valve, is very serious by washing away of steam water two phase flow, and unit overhauls urgent drain valve when transporting to be difficult to close this isolating valve, tight.Sometimes, the maintenance isolating valve, often opened also is established in the upstream of the urgent drain valve of high-pressure heater.
The large multiple table of change (1000MW unit) of high-pressure heater saturated Draining hook dilatation volume
As seen from the above table, the hydrophobic of the urgent draining system of high-pressure heater of conventional design drains into the hydrophobic development unit be connected with condenser, when urgent drain valve standard-sized sheet in valve with valve after steam water two phase flow flow velocity in pipe all very high, very large scouring force (steam and water bursting power) is produced to spool and valve seat, makes it wearing and tearing.In fact, initially open with the flow velocity of the steam water two phase flow in the gap flowing through spool and valve seat close to dwell period higher at urgent drain valve, more severe to the erosive wear of spool and valve seat.Therefore, steam water two phase flow erosive wear spool and valve seat are the main causes that the urgent draining system of high-pressure heater causing conventional design leaks.
If the outlet pressure of urgent for high-pressure heater drain valve is brought up to 0.1MPa (a) by 0.005MPa (a), in the pipe after the urgent drain valve of 1000MW unit high-pressure heater, the flow velocity range of decrease of steam water two phase flow is then more than 95%.Therefore, the urgent draining system of high-pressure heater is as shown in Figure 1 such, the outlet pressure of urgent drain valve is higher than atmospheric pressure, the erosive wear degree of steam water two phase flow to spool and valve seat can be reduced significantly, extend the service life of urgent drain valve significantly, improve the tightness of urgent drain valve.Visible, the urgent draining system of high-pressure heater of China's comparatively early design is hydrophobic, and not drain into the hydrophobic development unit be connected with condenser more suitable.
Summary of the invention
The purpose of this utility model is for solving the urgent hydrophobic drain valve of existing high-pressure heater by the washing away of steam water two phase flow, impaired serious problem and the height that provides adds urgent Draining hook ease vapour system.
The utility model realizes by following technical scheme:
Height adds urgent Draining hook ease vapour system, comprises three (can be not limited to three) high-pressure heaters, and wherein the first high-pressure heater adds normal drain valve by the first height and is connected with the input of the second high-pressure heater; Described second high-pressure heater adds normal drain valve by the second height and presses the input of heater to be connected with third high; Described third high pressure heater adds normal drain valve by third high and is connected to normal hydrophobic pipeline.
There is height to add urgent hydrophobic ease vapour device and comprise cylindrical shell; Described cylindrical shell is vertical cylinder; Described cylindrical shell upper surface is provided with ease steam ports, and described cylindrical shell lower surface is provided with hydrophobic discharge outlet; Be provided with several height in the middle part of described cylindrical shell and add urgent hydrophobic water inlet pipe; Described height adds urgent hydrophobic water inlet pipe and be evenly arranged three in the middle part of described cylindrical shell; Described height adds the water inlet being provided with opening upwards in urgent hydrophobic water inlet pipe and the dewatering orifice that Open Side Down.
Heater also adds urgent drain valve respectively by the first height to described first high-pressure heater, described second high-pressure heater, described third high pressure, the second height adds urgent drain valve, third high adds urgent drain valve and adds urgent hydrophobic water inlet pipe with described height and be connected;
Described height is added urgent hydrophobic ease vapour device and is connected with the inlet end of oxygen-eliminating device by described ease steam ports; Described height is added urgent hydrophobic ease vapour device and is connected with the water inlet end of described oxygen-eliminating device by described hydrophobic discharge outlet.
Further, the admission end of described oxygen-eliminating device is also connected with steam turbine by extraction line.
Again further, described hydrophobic discharge outlet is also connected with high-pressure heater feedwater piping by boiler feed pump.
The outlet pressure of urgent for high-pressure heater drain valve is about brought up to 1MPa (a) by 0.005MPa (a) by the utility model, and after the urgent drain valve of first, second, third high-pressure heater of 1000MW unit, in pipe, the flow velocity range of decrease of steam water two phase flow is then 99.6%, 99.6%, 99.8% respectively.Therefore, if the promptly hydrophobic of high-pressure heater is drained into the pressure type flash vessel suitable with oxygen-eliminating device pressure, then can reduce by a larger margin steam water two phase flow to the erosive wear degree of urgent valve plug of drain valve and valve seat, extend the service life of urgent drain valve, improve the tightness of urgent drain valve.
Accompanying drawing explanation
Fig. 1 is the urgent draining system of 200MW domestic super-pressure unit high-pressure heater.
Fig. 2 is the urgent draining system of high-pressure heater of conventional design.
Fig. 3 is the structural representation that height adds urgent hydrophobic ease vapour device.
Fig. 4 is urgent hydrophobic ease vapour system () schematic diagram of high-pressure heater.
Fig. 5 is urgent hydrophobic ease vapour system (two) schematic diagram of high-pressure heater.
Fig. 6 is urgent hydrophobic ease vapour system (three) schematic diagram of high-pressure heater.
In figure: high-pressure heater 1; First high-pressure heater 11; Second high-pressure heater 12; Third high pressure heater 13; Height adds urgent drain valve 2; First height adds urgent drain valve 21; Second height adds urgent drain valve 22; Third high adds urgent drain valve 23; Height adds urgent hydrophobic ease vapour device 3; Cylindrical shell 31; Ease steam ports 32; Hydrophobic draining button 33; Height adds urgent hydrophobic water inlet pipe 34; Water inlet 341; Dewatering orifice 342; Oxygen-eliminating device 4; Boiler feed pump 5; Height adds normal drain valve 6; First height adds normal drain valve 61; Second height adds normal drain valve 62; Third high adds normal drain valve 63; Condenser 7; Height adds urgent hydrophobic development unit 8; Normal hydrophobic pipeline A (being connected to oxygen-eliminating device); Urgent hydrophobic output B (being connected to regular unloading container); High-pressure heater feedwater piping C (being connected to feedwater to high-pressure heater input); Steam turbine gas pipeline D (coming from extracted steam from turbine).
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, but this embodiment should not be construed restriction of the present utility model, only for example, simultaneously by illustrating that advantage of the present utility model will become clearly and easy understand.
As shown in drawings, height adds urgent Draining hook ease vapour system, comprises three high-pressure heaters 1, and wherein the first high-pressure heater 11 adds normal drain valve 61 by the first height and is connected with the input of the second high-pressure heater 12; Second high-pressure heater 12 adds normal drain valve 62 by the second height and presses the input of heater 13 to be connected with third high; Third high pressure heater 13 adds normal drain valve 63 by third high and is connected to normal hydrophobic pipeline A, is connected to oxygen-eliminating device 4 by normal hydrophobic pipeline A.In actual production activity, three high-pressure heaters 1 can be not limited only to.
There is height to add urgent hydrophobic ease vapour device 3 and comprise cylindrical shell 31; Cylindrical shell 31 is vertical cylinder; Cylindrical shell 31 upper surface is provided with ease steam ports 32, and cylindrical shell 31 lower surface is provided with hydrophobic discharge outlet 33; Be provided with several height in the middle part of cylindrical shell 31 and add urgent hydrophobic water inlet pipe 34; Height adds urgent hydrophobic water inlet pipe 34 and be evenly arranged three in the middle part of cylindrical shell 31; Height adds the water inlet 341 being provided with opening upwards in urgent hydrophobic water inlet pipe 34 and the dewatering orifice 342 that Open Side Down.
Respectively by the first height, first high-pressure heater 11, second high-pressure heater 12, third high pressure heater 13 also adds that urgent drain valve 21, second height adds urgent drain valve 22, third high adds urgent drain valve 23 and adds urgent hydrophobic water inlet pipe 34 with height and be connected.
Height is added urgent hydrophobic ease vapour device 3 and is connected with the inlet end of oxygen-eliminating device 4 by ease steam ports 32; Height is added urgent hydrophobic ease vapour device 3 and is connected with the water inlet end of oxygen-eliminating device 4 by hydrophobic discharge outlet 33.
In appeal scheme, the admission end of oxygen-eliminating device 4 is also connected with steam turbine by extraction line D, height add urgent hydrophobic ease vapour steam turbine is taken out come steam enter oxygen-eliminating device 4 in the lump.
Optionally, hydrophobic discharge outlet 33 is also connected with high-pressure heater feedwater piping C by boiler feed pump 5, height is added drainage pump in urgent hydrophobic ease vapour device 3 after dilatation to high-pressure heater 1.
Add in urgent hydrophobic ease vapour device 3 at height after the urgent Draining hook of native system high-pressure heater and vaporize, the hydrophobic inflow oxygen-eliminating device 4 water tank bottom after vaporization, the steam after vaporization floats through steam escape tube and flows into the steam dome of oxygen-eliminating device 4.Obviously, height adds the operating pressure of the rear pressure of urgent drain valve 2 a little more than oxygen-eliminating device 4, valve is interior is very little with the steam water two phase flow flow velocity in pipe after valve compared with the urgent draining system of the high-pressure heater of conventional design, the spool of urgent drain valve 2 is added to height and valve seat erosive wear little, the tightness that height adds urgent drain valve 2 is good.During unit operation, both spool and the valve seat generation mild wear of the urgent drain valve of high-pressure heater had been made, in addition the high pressure reduction little (downstream pressure is high) adding urgent drain valve 2 and bear, the urgent hydrophobic leakage rate of high-pressure heater is also fewer than conventional system a lot.
In addition, when the urgent drain valve of high-pressure heater occurs to leak, leak the carbonated drink after hydrophobic vaporization and all enter oxygen-eliminating device 4, urgent hydrophobic cold source energy is not had compared with conventional system, the urgent draining system of high-pressure heater can be reduced and leak the unit hear rate increased, improve the heat-economy of unit operation.
When the height of 1000MW unit first high-pressure heater 11 add urgent drain valve 2 open time, urgent hydrophobic amount about squeezes the amount of drawing gas of the oxygen-eliminating device 4 heat-setting water of 70% by the flash steam of the confluent estimation of 10%.Therefore, the height of the first high-pressure heater 11 that vaporization rate is large adds urgent drain valve 2 when opening, and the saturated vapor in oxygen-eliminating device 4 can not blow back into steam turbine.
For the urgent draining system of novel high-pressure heater, the safety valve of oxygen-eliminating device 4, overflow pipe and high high water level discharge water and should consider that high-pressure heater promptly dredges water mitigation, and the high high water level of oxygen-eliminating device 4 discharges water and should drain into boiler starting hydrophobic expanding container 8.
During to the Transformation of Unit of having gone into operation, the high urgent hydrophobic ease vapour system of novel high-pressure heater adding urgent hydrophobic ease vapour device 3 of the band shown in Fig. 6 can be adopted.This system high pressure heater is promptly hydrophobic adds the hydrophobic down-comer arranged into oxygen-eliminating device 4 after vaporizing in urgent hydrophobic ease vapour device 3 at height, and the steam after vaporization flows into oxygen-eliminating device 4 through steam pipeline (trace).Drain temperature after ease vapour is slightly higher than the feed temperature after deoxygenation, notes adjusting relevant operating mode, cavitation can not occur during to ensure that mixed feedwater flows into fore pump.
Below do not elaborate and be prior art.
Claims (3)
1. height adds urgent Draining hook ease vapour system, it is characterized in that: comprise three high-pressure heaters (1), wherein the first high-pressure heater (11) adds normal drain valve (61) by the first height and is connected with the input of the second high-pressure heater (12); Described second high-pressure heater (12) adds normal drain valve (62) by the second height and presses the input of heater (13) to be connected with third high; Described third high pressure heater (13) adds normal drain valve (63) by third high and is connected to normal hydrophobic pipeline (A);
There is height to add urgent hydrophobic ease vapour device (3) and comprise cylindrical shell (31); Described cylindrical shell (31) is vertical cylinder; Described cylindrical shell (31) upper surface is provided with ease steam ports (32), and described cylindrical shell (31) lower surface is provided with hydrophobic discharge outlet (33); Described cylindrical shell (31) middle part is provided with several height and adds urgent hydrophobic water inlet pipe (34); Described height adds urgent hydrophobic water inlet pipe (34) and has been evenly arranged three at described cylindrical shell (31) middle part; Described height adds the water inlet (341) being provided with opening upwards in urgent hydrophobic water inlet pipe (34) and the dewatering orifice (342) that Open Side Down;
Described first high-pressure heater (11), described second high-pressure heater (12), described third high pressure heater (13) also adds urgent drain valve (21) respectively by the first height, the second height adds urgent drain valve (22), third high adds urgent drain valve (23) and adds urgent hydrophobic water inlet pipe (34) with described height and be connected;
Described height is added urgent hydrophobic ease vapour device (3) and is connected with the inlet end of oxygen-eliminating device (4) by described ease steam ports (32); Described height is added urgent hydrophobic ease vapour device (3) and is connected with the water inlet end of described oxygen-eliminating device (4) by described hydrophobic discharge outlet (33).
2. height according to claim 1 adds urgent Draining hook ease vapour system, it is characterized in that: the admission end of described oxygen-eliminating device (4) is also connected with steam turbine by extraction line (D).
3. height according to claim 2 adds urgent Draining hook ease vapour system, it is characterized in that: described hydrophobic discharge outlet (33) is also connected with high-pressure heater feedwater piping (C) by boiler feed pump (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520244075.4U CN204573990U (en) | 2015-04-21 | 2015-04-21 | Height adds urgent Draining hook ease vapour system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520244075.4U CN204573990U (en) | 2015-04-21 | 2015-04-21 | Height adds urgent Draining hook ease vapour system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204573990U true CN204573990U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520244075.4U Withdrawn - After Issue CN204573990U (en) | 2015-04-21 | 2015-04-21 | Height adds urgent Draining hook ease vapour system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204573990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748100A (en) * | 2015-04-21 | 2015-07-01 | 中国电力工程顾问集团中南电力设计院有限公司 | High-pressure heater emergency draining depressurization steam escaping system |
-
2015
- 2015-04-21 CN CN201520244075.4U patent/CN204573990U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748100A (en) * | 2015-04-21 | 2015-07-01 | 中国电力工程顾问集团中南电力设计院有限公司 | High-pressure heater emergency draining depressurization steam escaping system |
| CN104748100B (en) * | 2015-04-21 | 2016-06-29 | 中国电力工程顾问集团中南电力设计院有限公司 | Height adds urgent Draining hook ease vapour system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150819 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |