CN108644756A - A kind of low-pressure heater draining system - Google Patents
A kind of low-pressure heater draining system Download PDFInfo
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- CN108644756A CN108644756A CN201810768183.XA CN201810768183A CN108644756A CN 108644756 A CN108644756 A CN 108644756A CN 201810768183 A CN201810768183 A CN 201810768183A CN 108644756 A CN108644756 A CN 108644756A
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- low
- hydrophobic
- pressure
- pressure heater
- pipeline
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The application provides a kind of low-pressure heater draining system, include No. 7 low-pressure heaters and No. 8 low-pressure heaters positioned at unit end two-stage, the hydrophobic outlet of No. 7 low-pressure heaters is located at No. 7 low-pressure heater housing bottoms, at the hydrophobic import of No. 8 low-pressure heaters is located on the downside of No. 8 low-pressure heater shell horizontal symmetry axis, hydrophobic outlet is connected to hydrophobic import by pipeline.Pipeline is equipped with adjustable ball valve, and the spool latus rectum that ball valve is adjusted is identical as pipeline drift diameter after valve preceding pipeline latus rectum, valve respectively, and the turning of pipeline is connected to by elbow.Drainage pump is set in hydrophobic exit, bottom is equipped with pressure sensor in No. 7 low-pressure heater shells, and adjustable ball valve, pressure sensor and drainage pump are connect with controller respectively.The problem of by changing the hydrophobic interface position and pipe arrangement of low-pressure heater, can effectively improve blocked drain between last two-stage low-pressure heater, while realizing the adjust automatically of water level, improve the economy of unit.
Description
Technical field
The present invention relates to the hydrophobic technical field of generating set more particularly to a kind of low-pressure heater draining systems.
Background technology
In common fired power generating unit low-pressure heaters at different levels, mainly utilize adjacent surface formula heater vapour side pressure poor,
By pressure it is higher it is hydrophobic flow automatically in the lower heater of pressure, gravity flow step by step is dredged step by step until mixed with main condensate
Water mode, systematic comparison is simple, can improve unit by upper level heater condensate heat disturbance to heat regenerative system
Economy.
The low-pressure heater of existing 300MW units arrangement, wherein be located at the low-pressure heater of last two-stage, No. 7 low pressure add
Hot device and No. 8 low-pressure heaters are total shell settings, and referring to 1, No. 7 low-pressure heaters of attached drawing, normally hydrophobic interface is arranged at No. 8
The top of low-pressure heater shell, the hydrophobic outlet of No. 7 low-pressure heaters and the hydrophobic outlet of No. 8 low-pressure heaters pass through pipeline
Connection.Drain regulating valve is additionally provided on the pipeline, the both sides of drain regulating valve are additionally provided with vacuum maintenance isolating valve, drain regulating valve
The level-one bigger than caliber before regulating valve of caliber afterwards, and first turning after regulating valve is connected using T-type threeway.
However, since normally hydrophobic interface is arranged at the top of No. 8 low-pressure heater shells No. 7 low-pressure heaters, exist
Hydrophobic water-head and the larger problem of the resistance of ducting.Moreover, in the setting of its layout of beam line, No. 8 low-pressure heater vapour side bodies
It is disposed with about 1 meter of high vertical hydrophobic section above, hydrophobic easy generation vaporizes and loses siphonage, and generation can not recycle the pipeline section
The phenomenon that corresponding pressure difference.In addition, the local resistance of T-type threeway is also larger, the resistance of hydrophobic pipeline can be made to increase.It is above-mentioned
Abnormal phenomenon and problem, make low pressure add at the phenomenon that leading to blocked drain between No. 7 low-pressure heaters and No. 8 low-pressure heaters
Hot device is hydrophobic to be run according to design cycle, and partial heat energy cannot be fully and rationally used, and reduce the economy of unit.
Invention content
This application provides a kind of low-pressure heater draining system, to solve between existing unit end two-stage low-pressure heater
There are blocked drain phenomenon, the problem of reducing unit economy.
A kind of low-pressure heater draining system includes No. 7 low-pressure heaters and No. 8 low-pressure heatings positioned at unit end two-stage
Device, the hydrophobic outlets of No. 7 low-pressure heaters are located at No. 7 low-pressure heater housing bottoms, No. 8 low-pressure heaters it is hydrophobic into
At mouth is located on the downside of No. 8 low-pressure heater shells horizontal symmetry axis, the hydrophobic outlet passes through pipe with the hydrophobic import
Road is connected to；
The pipeline is equipped with adjustable ball valve, the spool latus rectum of the adjustable ball valve respectively with valve preceding pipeline latus rectum,
Pipeline drift diameter is identical after valve, and the turning of the pipeline is connected to by elbow；
The hydrophobic exit is equipped with drainage pump, and bottom is equipped with pressure sensor, institute in No. 7 low-pressure heater shells
Adjustable ball valve, the pressure sensor and the drainage pump is stated to connect with controller respectively.
Optionally, the hydrophobic import is located on the downside of No. 8 low-pressure heater shells horizontal symmetry axis, and described hydrophobic
Outlet is longitudinal to flush place.
Optionally, the hydrophobic import is located at the side of No. 8 low-pressure heater shells.
Optionally, the pipeline includes the first tipping tube, standpipe and the second tipping tube, the hydrophobic outlet and described first
Tipping tube is connected to, and the hydrophobic import is connected to second tipping tube, and the standpipe is inclined with described first respectively by elbow
Inclined tube, second tipping tube connection.
Optionally, gas vent is equipped at the hydrophobic water level of No. 7 low-pressure heaters shell highest.
Optionally, the controller includes variable-frequency governor, and the variable-frequency governor is connected with change-over switch, the frequency conversion
Governor is connect with the drainage pump.
Optionally, the flow passage surface of the drainage pump is coated with corrosion-resistant, resistant to corrosion coating.
Technical solution provided by the present application includes following advantageous effects：
The application provides a kind of low-pressure heater draining system, with existing low-pressure heating draining system pipe arrangement phase
Than being arranged the normal hydrophobic hydrophobic interface into No. 8 low-pressure heaters of No. 7 low-pressure heaters in No. 8 low-pressure heater shell water
At on the downside of flat symmetry axis, the hydrophobic water-head between two-stage low-pressure heater is reduced, while decreasing pipe arrangement length, dropped
The on-way resistance of low pipeline and local resistance.It is arranged on connecting pipe and ball valve is adjusted, spool and the bottom of ball valve is adjusted
Plane-plane contact, good airproof performance, and even if ball valve abrasion nor affects on its adjustability, be arranged the spool latus rectum of ball valve respectively with before valve
Pipeline drift diameter is identical after pipeline drift diameter, valve, can reduce the resistance of pipeline.Maintenance isolating valve is not set on the pipeline, it can be into one
Step reduces the resistance of drain water piping, and unit is made more to adapt to variable load operation, improves economy.In addition, being arranged in hydrophobic outlet
Drainage pump can increase hydrophobic fluency, while can be dredged to low-pressure heater by controller, pressure sensor and drainage pump
Water water level automatically adjusts control, realizes the automation of hydrophobic adjustment, helps to improve unit economy.Therefore, the application
A kind of low-pressure heater draining system is provided, can effectively improve blocked drain problem between last two-stage low-pressure heater, while real
The automation of existing hydrophobic water level adjustment, improves the economy of unit.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of schematic diagram of existing low-pressure heater draining system provided by the present application；
Fig. 2 is a kind of schematic diagram of low-pressure heater draining system provided by the embodiments of the present application；
Fig. 3 is a kind of low-pressure heater draining system water level control connection diagram provided by the embodiments of the present application；
Fig. 4 is the schematic diagram of pipeline connection between a kind of hydrophobic interface of low-pressure heater provided by the embodiments of the present application.
Reference sign：1, No. 7 low-pressure heaters, 11, hydrophobic outlet, 12, drainage pump, 13, pressure sensor, 2,8
Number low-pressure heater, 21, hydrophobic import, 3, pipeline, 31, adjustable ball valve, the 32, first tipping tube, 33, standpipe, 34, second inclines
Inclined tube, 4, controller, 41, variable-frequency governor, 42, change-over switch, 5, drain regulating valve, 6, vacuum valve.
Specific implementation mode
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, other drawings may also be obtained based on these drawings.
Attached drawing 2 is please referred to, the figure shows a kind of low-pressure heater draining system schematic diagrames provided by the embodiments of the present application.
A kind of low-pressure heater draining system provided by the present application includes No. 7 low-pressure heaters 1 positioned at unit end two-stage
Hydrophobic outlet 11 with 2, No. 7 low-pressure heaters 1 of No. 8 low-pressure heaters is located at the bottom of No. 71 shells of low-pressure heater, and No. 8 low
The hydrophobic import 21 of heater 2 is pressed to be located at No. 82 shell horizontal symmetry axis downsides of low-pressure heater, No. 7 low-pressure heaters are hydrophobic
Outlet 11 is connected to the hydrophobic import 21 of No. 8 low-pressure heaters 2 by pipeline 3.
The hydrophobic import 21 of No. 8 low-pressure heaters 2 is moved on at one on the downside of No. 82 horizontal symmetry axis of low-pressure heater, into one
Step reduces the water-head of No. 7 low-pressure heaters 1 and No. 82 drain ports of low-pressure heater, while also reducing pipeline between two interfaces
3 length and valve quantity, reduces on-way resistance and the local resistance of drain water piping, improves between two-stage low-pressure heater
Hydrophobic patency.
Pipeline 3 is equipped with adjustable ball valve 31, the spool latus rectum of the adjustable ball valve 31 respectively with valve preceding pipeline latus rectum, valve
Pipeline drift diameter is identical afterwards, and the turning of pipeline 3 is connected to by elbow.It is through-type hydrophobic using lift with existing draining system
Regulating valve 5 is compared, and 31 its spool of revolving adjustable ball valve is that face contacts with bottom surface, has very strong tightness, moreover, i.e.
So that spool is worn, on the controllability of ball valve substantially without influence, there is good applicability.
Existing draining system, according to the rules, the caliber after drain regulating valve are bigger than the caliber before valve, and after regulating valve
First 90 degree of turning must use the T-type threeway with plug, with consume it is hydrophobic vaporization two phase flow function.And it is provided in the application
Low-pressure heater draining system in, be adjusted the spool latus rectum of ball valve 31 respectively with pipeline drift diameter after valve preceding pipeline latus rectum, valve
It is identical, the resistance of pipeline can be reduced, and turning is connected to using elbow, the local resistance of elbow is much smaller than T-type threeway, helps
In reducing hydrophobic local resistance, ensure hydrophobic patency.
In addition, in a kind of low-pressure heater draining system provided by the embodiments of the present application, since ball valve 31 is adjusted
Function is to adjust hydrophobic flow, of less demanding to its tightness, and adjustable ball valve 31 has abrasion during operation, can stop in unit
It is repaired when machine or maintenance, therefore maintenance isolating valve is not set in adjustable 31 both sides of ball valve, help to reduce hydrophobic
The resistance of pipeline promotes patency.Moreover, in the case of maintenance isolating valve is not arranged, unit is run in larger load range
When, No. 71 urgent drain valves of low-pressure heater will not act, and hydrophobic cooling section can also play a role, and unit is made to be suitable for becoming negative
Lotus runs, and has good heat-economy.
Attached drawing 3 is please referred to, the figure shows a kind of low-pressure heater draining system water level controls provided by the embodiments of the present application
Connection diagram processed.
It is equipped with bottom in 12, No. 71 shells of low-pressure heater of drainage pump at hydrophobic outlet 11 and is equipped with pressure sensor 13, it can
Regulation ball valve 31, pressure sensor 13 and drainage pump 12 are connect with controller 4 respectively.
Hydrophobic water level can be monitored using pressure sensor 13, pressure sensor 13 passes the water level information detected
To controller 4, controller 4 can control the rotating speed and adjustable ball valve 31 of drainage pump 12 according to the water level information, to
Control hydrophobic water level.When as higher such as hydrophobic water level, the rotating speed of drainage pump 12 can be accelerated, while controlling and ball valve 31 is adjusted, increased
Hydrophobic flow adjusts hydrophobic water level.Therefore, can automatically adjust to low-pressure heater hydrophobic water level control, realize hydrophobic
The automation of adjustment, helps to improve unit economy.
Low-pressure heater draining system provided by the present application, by the way that No. 7 low-pressure heaters 1 are hydrophobic into No. 8 low-pressure heatings
The hydrophobic interface of device 2 is arranged on the downside of No. 82 shell horizontal symmetry axis of low-pressure heater, No. 7 low-pressure heaters 1 it is hydrophobic go out
Mouth 11 is connected to the hydrophobic import 21 of No. 8 low-pressure heaters 2 by pipeline 3, and is arranged on the connecting pipe 3 and ball valve is adjusted
31, the spool latus rectum that ball valve 31 is adjusted is identical as pipeline drift diameter after valve preceding pipeline latus rectum, valve respectively, to reduce 3 resistance of pipeline
And local resistance, promote hydrophobic smoothness.In addition, drainage pump 12 is set at the hydrophobic outlet 11 of No. 7 low-pressure heaters 1,
Bottom is arranged pressure sensor 13 in shell, and by drainage pump 12, pressure sensor 13, adjustable ball valve 31 with controller 4
Connection, realizes automatically controlling for hydrophobic water level.
Optionally, hydrophobic import 21 is located on the downside of No. 8 low-pressure heater shell horizontal symmetry axis, longitudinal with hydrophobic outlet 11
Flush place.The hydrophobic outlet 11 of i.e. No. 7 low-pressure heaters 1 is longitudinal concordant with the hydrophobic import 21 of No. 8 low-pressure heaters 2, favorably
In reducing hydrophobic water-head, 3 resistance of pipeline is reduced.
Optionally, hydrophobic import 21 is located at the side of No. 82 shells of low-pressure heater.Hydrophobic import 21 is located at No. 8 low pressure and adds
On side housing on the downside of 2 horizontal symmetry axis of hot device, 3 distance of pipeline between hydrophobic outlet 11 is relatively reduced, is reduced thin
Water water-head helps to improve hydrophobic patency.
Attached drawing 4 is please referred to, the figure shows pipelines between a kind of hydrophobic interface of low-pressure heater provided by the embodiments of the present application
The schematic diagram of connection.
Optionally, pipeline 3 includes the first tipping tube 32, standpipe 33 and the second tipping tube 34, and hydrophobic outlet 11 is inclined with first
Inclined tube 32 is connected to, and hydrophobic import 21 is connected to the second tipping tube 34, standpipe 33 by elbow respectively with the first tipping tube 32, second
Tipping tube 34 is connected to.In the embodiment of the present application, first tipping tube 32 and the second tipping tube 34 are what one end slightly tilted down
Pipeline is connected to the hydrophobic import 21 of first 32, No. 8 low-pressure heaters 2 of tipping tube at the hydrophobic outlet 11 of No. 7 low-pressure heaters 1
Connection the second tipping tube 34 in place's can reduce the elbow that uses at hydrophobic import 21 and hydrophobic outlet 11, reduce pipeline 3 resistance and
Local resistance helps to promote hydrophobic fluency.
Optionally, gas vent is equipped at No. 71 hydrophobic water levels of shell highest of low-pressure heater.The effect of the exhaust outlet is removed and is opened
Dynamic exhaust is outer, and when running, hydrophobic water level control is improper, may will produce the phenomenon that low water level destroys water seal, also can be used at this time
The exhaust outlet is exhausted.
Optionally, controller 4 includes variable-frequency governor 41, which is connected with change-over switch 42, becomes frequency modulation
Fast device 41 is connect with the motor of drainage pump 12.Change-over switch 42 between frequency conversion and power frequency for carrying out the method for operation of governor
Conversion.
Optionally, the flow passage surface of drainage pump 12 is coated with corrosion-resistant, resistant to corrosion coating.The coating includes rubber, no
Become rusty steel etc., and flow passage surface is equipped with corrosion-resistant, resistant to corrosion coating, can reduce the generation of the turbid phenomenon of vapour, extends making for drainage pump 12
Use the service life.
The application provides a kind of low-pressure heater draining system, with existing low-pressure heating draining system pipe arrangement phase
Than being arranged the normal hydrophobic hydrophobic interface into No. 8 low-pressure heaters of No. 7 low-pressure heaters in No. 8 low-pressure heater shell water
At on the downside of flat symmetry axis, the hydrophobic water-head between two-stage low-pressure heater is reduced, while decreasing pipe arrangement length, dropped
The low on-way resistance of pipeline.It is arranged on connecting pipe and ball valve is adjusted, the spool and bottom plane-plane contact of ball valve is adjusted, it is close
Envelope property is good, and even if ball valve abrasion nor affects on its adjustability, be arranged the spool latus rectum of ball valve respectively with valve preceding pipeline latus rectum, valve
Pipeline drift diameter is identical afterwards, can reduce the resistance of pipeline.Maintenance isolating valve is not set on the pipeline, drain pipe can be further reduced
The local resistance in road, and unit is made more to adapt to variable load operation, improve heat-economy.In addition, drainage pump is arranged in hydrophobic outlet
Hydrophobic fluency can be increased, while can be to the hydrophobic water level of low-pressure heater by controller, pressure sensor and drainage pump
Automatically adjust control, realizes the automation of hydrophobic adjustment, helps to improve unit economy.Therefore, the application provides one
Kind low-pressure heater draining system, can effectively improve blocked drain problem between last two-stage low-pressure heater, while realizing hydrophobic
The automation of water level adjustment, improves the economy of unit.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include but also include not having so that article or equipment including a series of elements include not only those elements
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited by sentence "including a ..." in the case of more limiting, it is not excluded that in the mistake for including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific implementation mode of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
It should be understood that the application is not limited to the content for being described above and being shown in the accompanying drawings, and can
To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by the accompanying claims.
Claims (7)
1. a kind of low-pressure heater draining system, which is characterized in that include No. 7 low-pressure heaters (1) positioned at unit end two-stage
Hydrophobic outlet (11) with No. 8 low-pressure heaters (2), No. 7 low-pressure heaters (1) is located at No. 7 low-pressure heaters (1) shell
The hydrophobic import (21) of bottom, No. 8 low-pressure heaters (2) is located on the downside of No. 8 low-pressure heaters (2) the shell horizontal symmetry axis
Place, the hydrophobic outlet (11) are connected to the hydrophobic import (21) by pipeline (3)；
The pipeline (3) is equipped with adjustable ball valve (31), the spool latus rectum of the adjustable ball valve (31) respectively with valve front tube
Pipeline drift diameter is identical after road latus rectum, valve, and the turning of the pipeline (3) is connected to by elbow；
Drainage pump (12) is equipped at the hydrophobic outlet (11), bottom is passed equipped with pressure in No. 7 low-pressure heaters (1) shell
Sensor (13), the adjustable ball valve (31), the pressure sensor (13) and the drainage pump (12) respectively with controller (4)
Connection.
2. low-pressure heater draining system according to claim 1, which is characterized in that the hydrophobic import (21) is located at institute
It states on the downside of No. 8 low-pressure heater (2) shell horizontal symmetry axis, longitudinally place is flushed with the hydrophobic outlet (11).
3. low-pressure heater draining system according to claim 1, which is characterized in that the hydrophobic import (21) is located at institute
State the side of No. 8 low-pressure heater (2) shells.
4. low-pressure heater draining system according to claim 1, which is characterized in that the pipeline (3) is inclined including first
Inclined tube (32), standpipe (33) and the second tipping tube (34), the hydrophobic outlet (11) are connected to first tipping tube (32), institute
It states hydrophobic import (21) to be connected to second tipping tube (34), the standpipe (33) is tilted with described first respectively by elbow
Manage (32), second tipping tube (34) connection.
5. low-pressure heater draining system according to claim 1, which is characterized in that No. 7 low-pressure heaters (1) shell
Gas vent is equipped at the hydrophobic water level of body highest.
6. low-pressure heater draining system according to claim 1, which is characterized in that the controller (4) includes frequency conversion
Governor (41), the variable-frequency governor (41) are connected with change-over switch (42), the variable-frequency governor (41) with it is described hydrophobic
Pump (12) connection.
7. low-pressure heater draining system according to claim 1, which is characterized in that the flow passage of the drainage pump (12)
Surface is coated with corrosion-resistant, resistant to corrosion coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768183.XA CN108644756A (en) | 2018-07-13 | 2018-07-13 | A kind of low-pressure heater draining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768183.XA CN108644756A (en) | 2018-07-13 | 2018-07-13 | A kind of low-pressure heater draining system |
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| Publication Number | Publication Date |
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| CN108644756A true CN108644756A (en) | 2018-10-12 |
Family
ID=63751605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810768183.XA Pending CN108644756A (en) | 2018-07-13 | 2018-07-13 | A kind of low-pressure heater draining system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812798A (en) * | 2019-03-11 | 2019-05-28 | 大唐桂冠合山发电有限公司 | 670MW Set Low Pressure Heater draining system |
| CN109812797A (en) * | 2019-03-11 | 2019-05-28 | 大唐桂冠合山发电有限公司 | Low-pressure heater draining system |
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
| CN109812798A (en) * | 2019-03-11 | 2019-05-28 | 大唐桂冠合山发电有限公司 | 670MW Set Low Pressure Heater draining system |
| CN109812797A (en) * | 2019-03-11 | 2019-05-28 | 大唐桂冠合山发电有限公司 | Low-pressure heater draining system |
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