CN209726157U - 670MW Set Low Pressure Heater draining system - Google Patents
670MW Set Low Pressure Heater draining system Download PDFInfo
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- CN209726157U CN209726157U CN201920303108.6U CN201920303108U CN209726157U CN 209726157 U CN209726157 U CN 209726157U CN 201920303108 U CN201920303108 U CN 201920303108U CN 209726157 U CN209726157 U CN 209726157U
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Abstract
The utility model discloses a kind of 670MW Set Low Pressure Heater draining systems, No. 7 low-pressure heaters and No. 8 low-pressure heaters including unit end two-stage, the first hydrophobic import is provided at the top of No. 7 low-pressure heaters, the first hydrophobic import is connected to the hydrophobic outlet of the low-pressure heater of upper level by first pipe, and the middle side edge of No. 7 low-pressure heaters is provided with the first hydrophobic outlet；The side of No. 8 low-pressure heaters is provided with the second hydrophobic import and the second hydrophobic outlet, the height and position of the second hydrophobic outlet is lower than the described second hydrophobic import, height of the first hydrophobic outlet apart from level ground is higher than height of the described second hydrophobic import apart from level ground, and the first hydrophobic outlet passes through second pipe and the described second hydrophobic inlet communication.The utility model can effectively avoid the features such as blocked drain and hydrophobic water auto-regulation.
Description
Technical field
The utility model relates to the hydrophobic fields of generating set.More specifically, the utility model relates to a kind of 670MW units
Low-pressure heater draining system.
Background technique
Datang laurel Heshan electricity generating corporation, Ltd's 670MW supercritical coal-fired units were gone into operation in 2011, boiler SG-
2129/25.4-M6301 the overcritical transformation direct current cooker of type, steam turbine be N670-24.2/566/566 type it is overcritical, it is primary in
Between reheating, single shaft, three cylinders, four steam discharge, double back pressures, condensing turbine, generator be QFSN-670-2 type hydrogen cooled generator, volume
Determine power 670MW.Using 7 grades of extraction feedwater heat regenerative systems, it is equipped with 3 high-pressure heaters, 4 low-pressure heaters and 1 deoxygenation
Device.No. 5/6, No. 7/8 low-pressure heater be it is horizontal, double-flow surface-type, water chamber and shell are using being welded to connect.No. 5, No. 6 it is low
Add using the five, the six grades of steam extractions, be external heater, No. 7, No. 8 low-pressure heaters be assembly, 7A/7B, No. 8A/8B it is low
Pressure heater is placed on condenser throat using the seven, the eight grades of steam extractions, is built-in heater.As shown in Figure 1, No. 7, No. 8 it is low
The top of the hydrophobic import setting shell of heater is pressed, the hydrophobic outlet of No. 7 low-pressure heaters is arranged in the middle part of side, and No. 7
The hydrophobic outlet of low-pressure heater is connect by drain water piping with the hydrophobic import of No. 8 low-pressure heaters, and hydrophobic water level is increased
Difference and pipeline resistance are not able to satisfy still hydrophobic after making 7A/7B, 8A/8B low-pressure heater normally hydrophobic valve opening reaching 100%
It needs.7A/7B, 8A/8B low-pressure heater can only open emergent drain door due to blocked drain, and unit heat consumption is caused to increase,
Extraction cycle efficiency reduces, and has seriously affected the economy of unit.
Utility model content
One purpose of the utility model is to solve at least the above problems and/or defect, and provide and at least will be described later
The advantages of.
The utility model is to provide a kind of 670MW Set Low Pressure Heater draining system there are one purpose, can make
It is hydrophobic to flow automatically step by step, it avoids that blocked drain occurs.
In order to realize these purposes and other advantages according to the present utility model, provides a kind of 670MW unit low pressure and add
Hot device draining system, No. 7 low-pressure heaters and No. 8 low-pressure heaters including unit end two-stage,
No. 7 low-pressure heaters are horizontal setting, be provided at the top of No. 7 low-pressure heaters first it is hydrophobic into
Mouthful, the middle side edge of No. 7 low-pressure heaters is provided with the first hydrophobic outlet；
No. 8 low-pressure heaters are horizontal setting, be provided on the side wall of No. 8 low-pressure heaters second it is hydrophobic into
The height and position of mouth and the second hydrophobic outlet, the second hydrophobic outlet is lower than the described second hydrophobic import, and described first is hydrophobic
It exports the height apart from level ground and is higher than height of the described second hydrophobic import apart from level ground, the first hydrophobic outlet
Pass through second pipe and the described second hydrophobic inlet communication.
Preferably, the first normal hydrophobic pitch is provided on the second pipe.
Preferably, the second pipe includes the first standpipe, the second standpipe and transverse tube, first standpipe and described the
One hydrophobic outlet connection, second standpipe are connect with the described second hydrophobic import, and the transverse tube setting adds in No. 7 low pressure
The lower section of hot device and No. 8 low-pressure heaters, the transverse tube are connect with first standpipe and the second standpipe respectively by elbow.The
Two pipelines shorten second by being connected to the second hydrophobic import behind the lower section of No. 7 low-pressure heaters and No. 8 low-pressure heaters
The length of pipeline, and make hydrophobic be flowed into No. 8 low-pressure heaters under gravity.
Preferably, steam-water two-phase flow drainer is provided on the second pipe, the steam-water two-phase flow drainer is set
It sets in the normal hydrophobic pitch water discharging direction side, the water discharging direction side of the steam-water two-phase flow drainer is provided with isolation
Valve, No. 7 low-pressure heaters are provided with gas phase hole on the side wall at bottom level 2/3-3/4, and the gas phase hole passes through
Phase transition tube is connect with the vapour signal port of the steam-water two-phase flow drainer, is provided with steam gate valve on the phase transition tube.By setting
Steam-water two-phase flow drainer is set, realizes the water level in No. 7 low-pressure heaters of automatic adjustment.
Preferably, the bottom of the steam-water two-phase flow drainer is provided with level sensing transmitter, and described second is hydrophobic
Exit is provided with to carry out according to water yield of the level sensing transmitter liquid level signal detected to the described second hydrophobic outlet
The controller of control, the controller include single-chip microcontroller, memory and electronically controlled proportional valve, and the electronically controlled proportional valve is arranged described
Second hydrophobic exit, the memory are pre-stored with liquid level H1, H2 and H3, the single-chip microcontroller and the level sensing pick-up
Device, memory and electronically controlled proportional valve be electrically connected, wherein the single-chip microcontroller is to the level sensing transmitter to transmitting
Liquid level h is judged, if liquid level h < H1, the single-chip microcontroller control the electronically controlled proportional valve door and open 25%；If liquid level H1≤liquid
Position h≤liquid level H2, the single-chip microcontroller control electronically controlled proportional valve opens 50%, if liquid level H2≤liquid level h≤liquid level H3, the monolithic
Machine controls electronically controlled proportional valve and opens 75%, if liquid level H3≤liquid level h, the single-chip microcontroller control electronically controlled proportional valve open 100%.It is logical
Control electronically controlled proportional valve and level sensing transmitter are crossed, the liquid level in No. 8 low-pressure heaters is automatically adjusted, makes No. 8 low-pressure heatings
Device maintains normal fluid level.
Preferably, be provided with bypass duct on the second pipe, the bypass duct be connected to isolating valve and
The two sides of normal hydrophobic pitch are equipped with the hydrophobic pitch of bypass on the bypass duct.By the way that bypass duct is arranged, it is convenient for vapour-liquid
The maintenance of two phase flow steam trap and the continuous service of equipment.
Preferably, one way stop peturn valve is provided on the second pipe, the one way stop peturn valve is arranged in the isolation
The water outlet side of valve.
The utility model is include at least the following beneficial effects: the setting of the second of No. 8 low-pressure heaters the hydrophobic import is high
Degree makes the hydrophobic of No. 7 low-pressure heaters that can flow into No. 8 naturally lower than the height of the first hydrophobic outlet of No. 7 low-pressure heaters
In low-pressure heater, the negative height difference of second pipe beginning and terminal room is made to become positive value, reduce pipeline local resistance and rubbed along journey
Wipe resistance；By single-chip microcontroller and electronically controlled proportional valve, the liquid level in No. 8 low-pressure heaters is automatically adjusted, makes No. 8 low-pressure heater dimensions
Hold normal fluid level.The utility model can effectively avoid the features such as blocked drain and hydrophobic water auto-regulation.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural representation of No. 7 low-pressure heaters (7A, 7B) and No. 8 low-pressure heaters (8A, 8B) in the prior art
Figure；
Fig. 2 is the pipeline connection schematic diagram of the utility model No. 7 low-pressure heaters and No. 8 low-pressure heaters；
Fig. 3 is the pipeline connection schematic diagram of the utility model No. 7 low-pressure heaters and No. 8 low-pressure heaters.
1, first pipe；2, hydrophobic outlet；3, the hydrophobic entrance of No. 7 low-pressure heaters；4, No. 8 low-pressure heaters is hydrophobic
Entrance, 5, drain water piping；6, the first hydrophobic import；7, the first hydrophobic outlet；8, the second hydrophobic import；9, the second hydrophobic outlet；
10, second pipe；11, steam-water two-phase flow drainer；12, steam gate valve；13, bypass duct；14, hydrophobic pitch is bypassed；15, every
From valve；16, normal hydrophobic pitch；17, electronically controlled proportional valve；20, the first hydrophobic pitch.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Embodiment
As Figure 2-3, a kind of 670MW Set Low Pressure Heater draining system, No. 7 low pressure including unit end two-stage add
Hot device and No. 8 low-pressure heaters,
No. 7 low-pressure heaters are horizontal setting, the cross sections of No. 7 low-pressure heaters be it is semi-circular, described No. 7
The first hydrophobic import 6 is provided at the top of low-pressure heater, the first hydrophobic import 6 is dredged with the low-pressure heater of upper level
Water out is connected to by first pipe, and the middle side edge of No. 7 low-pressure heaters is provided with the first hydrophobic outlet 7；
The cross section of No. 8 low-pressure heaters is semi-circular, the horizontal side that No. 7 low-pressure heaters are arranged in
Surrounding cross section with No. 7 low-pressure heaters is circular structure, and the side of No. 8 low-pressure heaters is provided with second and dredges
The height and position of water inlet 8 and the second hydrophobic outlet 9, the second hydrophobic outlet 9 is lower than the described second hydrophobic import 8, described
First hydrophobic 7 height apart from level ground of outlet is higher than height of the described second hydrophobic import 8 apart from level ground, and described the
One hydrophobic outlet 7 is connected to by second pipe 10 with the described second hydrophobic import 8.
On the basis of the above embodiments, in one embodiment, it is normal thin that first is provided on the second pipe 10
Water pitch 16.
On the basis of the above embodiments, in one embodiment, the second pipe 10 is stood including the first standpipe, second
Pipe and transverse tube, first standpipe are connect with the described first hydrophobic outlet 7, second standpipe and the described second hydrophobic import 8
The lower section of No. 7 low-pressure heaters and No. 8 low-pressure heaters is arranged in connection, the transverse tube, and the transverse tube passes through elbow point
It is not connect with first standpipe and the second standpipe.Second pipe 10 passes through under No. 7 low-pressure heaters and No. 8 low-pressure heaters
It is connected to the second hydrophobic import 8 behind side, shortens the length of second pipe 10, and makes hydrophobic to be flowed under gravity
In No. 8 low-pressure heaters.
On the basis of the above embodiments, in one embodiment, stream-liquid two-phase flow is provided on the second pipe 10
The side of normal hydrophobic 16 water discharging direction of pitch, the vapour is arranged in steam trap 11, the steam-water two-phase flow drainer 11
The water discharging direction side of liquid two-phase steam trap 11 is provided with isolating valve 15, and No. 7 low-pressure heaters are apart from bottom level 2/
Gas phase hole is provided on the side wall at place, the gas phase hole passes through the vapour of phase transition tube and the steam-water two-phase flow drainer 11
Signal port connects, and is provided with steam gate valve 12 on the phase transition tube.When the water level in No. 7 low-pressure heaters rises, vapour amount letter
Number reduce, steam-water two-phase flow drainer is passed to by phase transition tube, in steam-water two-phase flow drainer liquid level rise, hydrophobic displacement
Increase, finally makes the water level decreasing in No. 7 low-pressure heaters；Conversely, when the water level decreasing in No. 7 low-pressure heaters, vapour amount
Signal increases, and passes to steam-water two-phase flow drainer by phase transition tube, and the liquid level in steam-water two-phase flow drainer reduces, hydrophobic row
Output is reduced, and increase the water level in No. 7 low-pressure heaters, to reach No. 7 low-pressure heater water level purposes of control.
On the basis of the above embodiments, in one embodiment, the bottom of the steam-water two-phase flow drainer is provided with
Level sensing transmitter, the second hydrophobic exit are provided with according to level sensing transmitter liquid level signal detected to institute
The controller that the water yield of the second hydrophobic outlet is controlled is stated, the controller includes single-chip microcontroller, memory and automatically controlled ratio
Valve 17, the electronically controlled proportional valve are arranged in the described second hydrophobic exit, and the memory is pre-stored with liquid level H1, H2 and H3,
The single-chip microcontroller and the level sensing transmitter, memory and electronically controlled proportional valve 17 are electrically connected, wherein the single-chip microcontroller pair
The level sensing transmitter judges the liquid level h transmitted, if liquid level h < H1, the single-chip microcontroller control the electricity
It controls proportion valve and opens 25%；If liquid level H1≤liquid level h≤liquid level H2, the single-chip microcontroller control electronically controlled proportional valve open 50%,
It is described if liquid level H3≤liquid level h if liquid level H2≤liquid level h≤liquid level H3, the single-chip microcontroller control electronically controlled proportional valve open 75%
Single-chip microcontroller controls electronically controlled proportional valve and opens 100%.It is detected in steam-water two-phase flow drainer by using level sensing transmitter 19
SEA LEVEL VARIATION, with by electronically controlled proportional valve 17 in time, automatically adjust No. 8 low-pressure heaters in liquid levels, avoid No. 7 low pressure
Hydrophobic water level in heater and No. 8 low-pressure heaters is too high or too low, guarantees the safe operation of equipment；Become by level sensing
The liquid level variation in device detection steam-water two-phase flow drainer is sent, electronically controlled proportional valve door is timely adjusted according to liquid level change information
Opening degree keeps the water level regulation of No. 8 low-pressure heaters more sensitive.
On the basis of the above embodiments, in one embodiment, it is provided with bypass duct 13 on the second pipe 10,
The bypass duct 13 is connected to the two sides of isolating valve 15 and normal hydrophobic pitch 16, is equipped on the bypass duct 13
Bypass hydrophobic pitch 14.By the way that bypass duct 13 is arranged, convenient for the maintenance of steam-water two-phase flow drainer 11 and continuing for equipment
Operation.
On the basis of the above embodiments, in one embodiment, it is provided with one way stop peturn valve on the second pipe, institute
State the water outlet side that the isolating valve is arranged in one way stop peturn valve.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization.It can be applied to various fields suitable for the present invention completely.For those skilled in the art,
Other modifications may be easily implemented.Therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (7)
1. a kind of 670MW Set Low Pressure Heater draining system, No. 7 low-pressure heaters and No. 8 low pressure including unit end two-stage
Heater, which is characterized in that
No. 7 low-pressure heaters are horizontal setting, are provided with the first hydrophobic import, institute at the top of No. 7 low-pressure heaters
The middle side edge for stating No. 7 low-pressure heaters is provided with the first hydrophobic outlet；
No. 8 low-pressure heaters are horizontal setting, and the side wall of No. 8 low-pressure heaters is provided with the second hydrophobic import and the
Two hydrophobic outlets, the height and position of the second hydrophobic outlet are lower than the described second hydrophobic import, the first hydrophobic outlet away from
Height from level ground is higher than the height of level ground with a distance from the described second hydrophobic import, and the first hydrophobic outlet passes through the
Two pipelines and the described second hydrophobic inlet communication.
2. 670MW Set Low Pressure Heater draining system according to claim 1, which is characterized in that the second pipe
On be provided with the first normal hydrophobic pitch.
3. 670MW Set Low Pressure Heater draining system according to claim 1, which is characterized in that the second pipe
Including the first standpipe, the second standpipe and transverse tube, first standpipe is connected with the described first hydrophobic outlet, second standpipe and
The lower section of No. 7 low-pressure heaters and No. 8 low-pressure heaters, institute is arranged in the second hydrophobic import connection, the transverse tube
Transverse tube is stated to connect with first standpipe and the second standpipe respectively by elbow.
4. 670MW Set Low Pressure Heater draining system according to claim 2, which is characterized in that the second pipe
On be provided with steam-water two-phase flow drainer, the steam-water two-phase flow drainer setting is in the normal hydrophobic pitch water discharging direction one
Side, the water discharging direction side of the steam-water two-phase flow drainer are provided with isolating valve, and No. 7 low-pressure heaters are apart from bottom height
Gas phase hole is provided on side wall at degree 2/3-3/4, the gas phase hole passes through phase transition tube and the steam-water two-phase flow drainer
Vapour signal port connects, and is provided with steam gate valve on the phase transition tube.
5. 670MW Set Low Pressure Heater draining system according to claim 4, which is characterized in that the vehicle repair major
The bottom of stream steam trap is provided with level sensing transmitter, and the second hydrophobic exit is provided with according to level sensing transmitter
The controller that liquid level signal detected controls the water yield of the described second hydrophobic outlet, the controller include monolithic
Machine, memory and electronically controlled proportional valve, in the described second hydrophobic exit, the memory is pre-stored for the electronically controlled proportional valve setting
There are liquid level H1, H2 and H3, the single-chip microcontroller and the level sensing transmitter, memory and electronically controlled proportional valve are electrically connected,
In, the single-chip microcontroller judges the liquid level h transmitted the level sensing transmitter, if liquid level h < H1, the list
Piece machine controls the electronically controlled proportional valve door and opens 25%；If liquid level H1≤liquid level h≤liquid level H2, the single-chip microcontroller control automatically controlled ratio
Example valve opens 50%, if liquid level H2≤liquid level h≤liquid level H3, the single-chip microcontroller control electronically controlled proportional valve opens 75%, if liquid level
H3≤liquid level h, the single-chip microcontroller control electronically controlled proportional valve open 100%.
6. 670MW Set Low Pressure Heater draining system according to claim 5, which is characterized in that the second pipe
On be provided with bypass duct, the bypass duct is connected to the two sides of isolating valve and normal hydrophobic pitch, the shunt valve
Bypass hydrophobic pitch is installed on road.
7. 670MW Set Low Pressure Heater draining system according to claim 5, which is characterized in that the second pipe
On be provided with one way stop peturn valve, the water outlet side of the isolating valve is arranged in the one way stop peturn valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920303108.6U CN209726157U (en) | 2019-03-11 | 2019-03-11 | 670MW Set Low Pressure Heater draining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920303108.6U CN209726157U (en) | 2019-03-11 | 2019-03-11 | 670MW Set Low Pressure Heater draining system |
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| Publication Number | Publication Date |
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| CN209726157U true CN209726157U (en) | 2019-12-03 |
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| CN201920303108.6U Active CN209726157U (en) | 2019-03-11 | 2019-03-11 | 670MW Set Low Pressure Heater draining system |
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Cited By (1)
| 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 |
-
2019
- 2019-03-11 CN CN201920303108.6U patent/CN209726157U/en active Active
Cited By (1)
| 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 |
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