CN107165854A - Sealing Water for Feedwater Pump is automatically controlled and retracting device - Google Patents
Sealing Water for Feedwater Pump is automatically controlled and retracting device Download PDFInfo
- Publication number
- CN107165854A CN107165854A CN201710316155.XA CN201710316155A CN107165854A CN 107165854 A CN107165854 A CN 107165854A CN 201710316155 A CN201710316155 A CN 201710316155A CN 107165854 A CN107165854 A CN 107165854A
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- water
- recovery tank
- backwater
- condenser
- main pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 214
- 238000007789 sealing Methods 0.000 title claims abstract description 70
- 238000011084 recovery Methods 0.000 claims abstract description 101
- 230000003020 moisturizing effect Effects 0.000 claims description 58
- 238000002955 isolation Methods 0.000 claims description 48
- 238000012423 maintenance Methods 0.000 claims description 12
- 239000008400 supply water Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000010455 autoregulation Effects 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000002242 deionisation method Methods 0.000 abstract 1
- 238000010977 unit operation Methods 0.000 description 13
- 235000019198 oils Nutrition 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004945 emulsification Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 241000372132 Hydrometridae Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Automatically controlled the invention provides a kind of Sealing Water for Feedwater Pump and retracting device, belong to the water work technical field for the direct or indirect Air-cooled Unit that large-size water-cooling unit and vacuum are changed greatly.It solves the problems such as prior art design is unreasonable.This Sealing Water for Feedwater Pump is automatically controlled and retracting device, the present apparatus and controller are wiredly and/or wirelessly connected, it includes being sealedly attached to the water main pipe of condenser input, output end and backwater main pipe respectively, closed in water main pipe and backwater main pipe and be provided with automatic water-supply adjusting part, backwater main pipe is sealedly attached to recovery tank, and recovery tank is connected with condenser.This Sealing Water for Feedwater Pump is automatically controlled and the advantage of retracting device is：Due to it is existing sealing water return water system Theoretical Design with the deviation of actual operating mode cause sealing water backwater can not freely not reclaim, this partial deionization water can only be arranged outside, the present invention can effectively realize effective automatic recovery to Sealing Water for Feedwater Pump, reduce a large amount of wastes of demineralized water.
Description
Technical field
The water work skill of the direct or indirect Air-cooled Unit changed greatly the invention belongs to large-size water-cooling unit and vacuum
Art field, is automatically controlled and retracting device more particularly, to a kind of Sealing Water for Feedwater Pump.
Background technology
In recent years, developing rapidly with China's power industry, Large Copacity, the thermal power generation unit of high parameter are national each
Ground is built one after another.For the most water chiller of China, its current actual operating state be unit operation during by
In participating in the reasons such as load peak regulation, its load change is larger and unit opens, stops also relatively frequent.And it is wide for NORTHWEST CHINA
For major region, because the serious deficient and country of water resource is for the environmentally friendly requirement of new-built unit, this area's unit is adopted substantially
The steam discharge of Steam Turbine is cooled down with Direct Air-Cooled or the form of indirect air cooling, the operation of direct or indirect Air-cooled Unit is special
Point is that its unit vacuum is influenceed larger by environment temperature and ambient wind velocity, and the changing value of its vacuum short time is in more than 20kPa.It is right
For unit of the feed pump using the form such as screw type mechanical seal of unit, its Sealing Water for Feedwater Pump supplies water and uses hand substantially
Control is moved, the water supply control and recovery of its Sealing Water for Feedwater Pump are influenceed by the factor such as unit load variation and the change of unit vacuum
Larger, it is close that the frequent variation of load and the large-scale change of the vacuum of direct or indirect Air-cooled Unit add feed pump
The normal control of water shutoff backwater and the difficulty of recovery.
The backwater of current Sealing Water for Feedwater Pump uses the design arrangement form of single-stage or multi-stage U-shaped water seal cylinder, a side substantially
The height for the pipeline that the design method of the face sealing water backwater is connected to condenser for the height and backwater of system water seal cylinder will
Ask calculating it is more accurate, and in actual moving process often the height of theoretical calculation with the operating mode deviation ratio in actual moving process
It is larger, cause backwater not smooth or the problems such as water seal cylinder is unable to reach the sealing effectiveness of design.Unit Sealing Water for Feedwater Pump backwater
Demineralized water can not be reclaimed and largely waste by not easily causing feed pump lubricating oil system oil mixed with water, oil emulsification and sealing water freely
The problems such as, and easily cause water seal cylinder can not when sealing water water return water seal cylinder and connection condenser piping highly designs unreasonable
Sealing effectiveness is reached, causes unit to leak vacuum, the economy of unit is influenceed.Meanwhile, traditional single-stage or multi-level water sealed tube are set
The applicability for the direct or indirect Air-cooled Unit that meter form is changed greatly for vacuum in the short time is poor, and it is adjusted and control
Difficulty is bigger, directly affects the security and economy of unit operation.
In order to solve the problem of prior art is present, people have carried out long-term exploration, it is proposed that miscellaneous solution
Scheme.For example, Chinese patent literature discloses a kind of Sealing Water for Feedwater Pump backwater retracting device [application number：
201210427662.8], including Sealing Water for Feedwater Pump return pipe, storage tank, steam exhaust device；It is characterized in that：The storage tank position
In the lower section of feed pump；The Sealing Water for Feedwater Pump return pipe is connected with storage tank water inlet, and water inlet is located at storage tank side
Middle and lower part；In the bottom of storage tank middle position, float-ball type altitude valve is set；Water fender is provided with storage tank, the water fender
Water inlet side below water storage cover plate is fixed on, and it is parallel with the storage tank tank wall where water inlet, and its lower end is less than water inlet
Mouthful and have gap with storage tank bottom；Float-ball type altitude valve is connected with the outlet pipe of storage tank, and the outlet pipe is filled with steam discharge
Put connection；Storage tank has maintenance discharging valve, and storage tank is provided with overflow pipe.
Above-mentioned scheme improves the subproblem of prior art to a certain extent, still, and the program is also at least present
Following defect：Tightness is not high, and the applicability of the direct or indirect Air-cooled Unit changed greatly for vacuum in the short time is poor,
Its adjustment and the difficulty controlled are bigger, the problems such as directly affecting the security and economy of unit operation.
The content of the invention
Regarding the issue above, the present invention provides it is a kind of reasonable in design, change the good feedwater of adaptability to vacuum
Pump seal water is automatically controlled and retracting device.
To reach above-mentioned purpose, present invention employs following technical proposal：The Sealing Water for Feedwater Pump of the present invention is automatically controlled
And retracting device, the present apparatus and controller wiredly and/or wirelessly connect, it include being sealedly attached to respectively condenser input,
The water main pipe and backwater main pipe of output end, it is characterised in that：Closed in water main pipe and backwater main pipe provided with automatic water-supply regulation
Component, backwater main pipe is sealedly attached to recovery tank, and recovery tank is connected with condenser, and recovery tank is provided with its energy in running status
The cistern water level self-regulation structure being tightly connected with condenser, automatic water-supply adjusting part and cistern water level self-regulation structure
It is connected respectively with controller.The automatic tune of the output of Sealing Water for Feedwater Pump is effectively realized in the setting of automatic water-supply adjusting part
Section, so as to improve its applicability changed greatly to vacuum in the short time, the setting of cistern water level self-regulation structure effectively subtracts
The generation of vacuum leak is lacked, the tightness of vacuum system provides guarantor during to improve unit operation security and unit operation
Barrier.
Preferably, automatic water-supply adjusting part includes the output pneumatic control valve in water main pipe, output gas
It is dynamic to be provided between regulating valve and condenser at least one supply water temperature detector, backwater main pipe close to condenser end provided with least
One return water temperature detector, output pneumatic control valve, supply water temperature detector and return water temperature detector respectively with control
Device is wiredly and/or wirelessly connected.Pass through the setting of output pneumatic control valve, supply water temperature detector and return water temperature detector
The output for realizing Sealing Water for Feedwater Pump is automatically adjusted, and especially changes frequent and some emergency episode situations in unit load
Under, can avoid feedwater pump lubricating oilses water inlet because operations staff causes to the sealing water confluent adjustment reason such as not in place,
The problems such as oil emulsification, the security of unit operation is improved, and it is simple in construction, convenient to install and maintain.
Preferably, output pneumatic control valve is provided with least one preceding water supply manual isolation valve away from condenser one end, supplies
Water pneumatic control valve is provided with least one rear water supply manual isolation valve close to condenser one end.Preceding water supply manual isolation valve is with after
The setting of water supply manual isolation valve facilitates the isolation maintenance to the output pneumatic control valve 2 on sealing water water main pipe b.
Preferably, cistern water level self-regulation structure includes the ordinary water level detection of the relative eminence on the inside of recovery tank
Height is provided with the inside of the warning line detector of device, relative lower, recovery tank and higher than the installed position of ordinary water level detector
Position control ball-cock assembly, high position control ball-cock assembly is connected with the overflow pipe on the outside of recovery tank, on the inside of recovery tank and less than police
The installed position for guarding against level switch controls ball-cock assembly provided with low level, and low level controls ball-cock assembly with being connected recovery tank and condenser
Connecting pipe on be connected close to one end of recovery tank, connecting pipe is provided with is isolated from the solidifying manually of recovery tank by condenser
Vapour device isolating valve.The setting of warning line detector and ordinary water level detector improves the automatic early-warning work(of recovery tank water level
Can, the setting of high position control ball-cock assembly and low level control ball-cock assembly not only ensures sealing water backwater amount and the water quantity sucked of condenser 23
Balance, the water level of recovery tank is maintained stabilization, to ensure that the vacuum of condenser 23 is not leaked there is provided ensureing.
Preferably, cistern water level self-regulation structure also includes the moisturizing pipeline with being connected at the top of recovery tank, moisturizing pipeline
Be provided with moisturizing pneumatic control valve, moisturizing pneumatic control valve is wiredly and/or wirelessly connected with controller, recovery tank bottom provided with
Its blow-off line connected, blow-off line is provided with least one manual blowdown isolating valve.Moisturizing pipeline and the pneumatic regulation of moisturizing
The function being automatically replenished into recovery tank can be achieved in the setting of valve.
Preferably, moisturizing pneumatic control valve is provided with least one preceding moisturizing manual isolation valve, moisturizing away from recovery tank one end
Pneumatic control valve is provided with least one rear moisturizing manual isolation valve close to recovery tank one end.Preceding moisturizing manual isolation valve and rear moisturizing
The setting of manual isolation valve facilitates the maintenance of the isolation to the moisturizing pneumatic control valve on moisturizing pipeline.
Preferably, backwater suction cylinder, connection backwater suction cylinder and recovery tank are sealedly connected between recovery tank and condenser
Pipeline be provided with and be used to being isolated from backwater suction cylinder into the manual suction cylinder isolating valve of recovery tank.The setting of water suction cylinder makes to coagulate
Tightness in vapour device is further ensured.
Preferably, backwater suction cylinder is provided with suction cylinder discharge duct, and discharge duct is provided with steam discharge isolating valve.For
System carries out water filling during initially putting into operation to vacuum in condenser suction cylinder 21, ensures the operation of vacuum in condenser suction cylinder full water.
Preferably, it is connected with backwater gland steam exhauster between backwater main pipe and recovery tank top；Close to condenser in backwater main pipe
One end is provided with least one backwater manual isolation valve.The setting of backwater manual isolation valve, is easy to the isolation to backwater main pipe.Backwater
Some vapor when being provided for Gas- liquid two-phase flow in exclusive segment operating mode lower water-back main pipe of gland steam exhauster, to eliminate sealing water
The vapour locking of backwater, ensures the smooth of sealing water backwater.
Preferably, it can be opened when being closed state, maintenance when present apparatus operation is offered at the top of recovery tank and enter recovery tank
Internal artificial detection hole.The setting of artificial detection hole facilitates maintenance and observation recovery tank inner facility especially to recovery tank
Interior high-order control ball-cock assembly and low level control ball-cock assembly, while also allowing for cleaning of the recovery tank during overhaul.
Compared with prior art, this Sealing Water for Feedwater Pump is automatically controlled and the advantage of retracting device is：Due to existing
Sealing water return water system Theoretical Design causes sealing water backwater can not freely not reclaim with the deviation of actual operating mode, and this part is removed
Salt solution can only be arranged outside, and the present invention can effectively realize effective automatic recovery to Sealing Water for Feedwater Pump, reduce a large amount of of demineralized water
Waste, improve the economy of unit operation；Automatic water-supply adjusting part can effectively realize the automatic of Sealing Water for Feedwater Pump output
Control, especially in the case of unit load changes frequent and some emergency episodes, can be avoided because operations staff is to sealing water
The problems such as confluent adjusts the water inlet of feedwater pump lubricating oilses, the oil emulsification that the reason such as not in place is caused, improves the peace of unit operation
Quan Xing；Ball-cock assembly, moisturizing pipeline are controlled by ordinary water level detector, high-order control ball-cock assembly, warning line detector, low level
With moisturizing pneumatic control valve realize to recovery tank water level automatically control so that realizes to sealing water backwater automatic recovery, effectively
Avoid traditional Sealing Water for Feedwater Pump system single-stage or multi-stage U-shaped water seal from running the leakage of the abnormal vacuum system caused,
The tightness of vacuum system when improving economy and the unit operation of unit operation；Overall structure of the present invention is simple, and it is for electricity
Flexibly, while artificial adjustment control is less in the process of running, operation is simple, safety, improves power plant's operation for the arrangement form of factory
Automaticity.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 provides the structural representation in the embodiment of the present invention.
In figure, condenser a, water main pipe b, backwater main pipe c, connecting pipe d, blow-off line e, preceding water supply manual isolation valve
1st, output pneumatic control valve 2, rear water supply manual isolation valve 3, supply water temperature detector 4, return water temperature detector 5, backwater hand
Dynamic isolating valve 6, backwater gland steam exhauster 7, artificial detection hole 8, moisturizing pipeline 9, preceding moisturizing manual isolation valve 10, moisturizing pneumatic control valve
11st, rear moisturizing manual isolation valve 12, overflow pipe 13, ordinary water level detector 14, high-order control ball-cock assembly 15, manual blowdown every
From valve 16, warning line detector 17, recovery tank 18, low level control ball-cock assembly 19, manual suction cylinder isolating valve 20, backwater suction
Cylinder 21, manual condenser isolating valve 22, condenser 23, steam discharge isolating valve 24.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, following examples are to this hair
Bright explanation and the invention is not limited in following examples.
As shown in figure 1, this Sealing Water for Feedwater Pump is automatically controlled and retracting device, the present apparatus and controller is wired and/or nothing
Line is connected, its water main pipe b and backwater main pipe c for including being sealedly attached to condenser a input, output ends respectively, its feature
It is：Closed on water main pipe b and backwater main pipe c and be provided with automatic water-supply adjusting part, backwater main pipe c is sealedly attached to recovery tank
18, recovery tank 18 is connected with condenser 23, and recovery tank 18 can be tightly connected provided with it in running status with condenser 23
Cistern water level self-regulation structure, automatic water-supply adjusting part and cistern water level self-regulation structure are connected with controller respectively,
Automatically adjusting for the output of Sealing Water for Feedwater Pump is effectively realized in the setting of automatic water-supply adjusting part, so as to improve it in short-term
The applicability that interior vacuum is changed greatly, the setting of cistern water level self-regulation structure effectively reduces the generation of vacuum leak,
The tightness of vacuum system provides guarantee during to improve unit operation security and unit operation.
Specifically, automatic water-supply adjusting part here includes the output pneumatic control valve 2 on water main pipe b,
It is provided between output pneumatic control valve 2 and condenser a at least one supply water temperature detector 4, backwater main pipe c close to condensation
Device a ends are provided with least one return water temperature detector 5, output pneumatic control valve 2, supply water temperature detector 4 and return water temperature
Detector 5 is wiredly and/or wirelessly connected with controller respectively, passes through output pneumatic control valve 2, the and of supply water temperature detector 4
The setting of return water temperature detector 5 realizes automatically adjusting for the output of Sealing Water for Feedwater Pump, is especially changed in unit load
In the case of frequent and some emergency episodes, it can avoid making because operations staff adjusts the reason such as not in place to sealing water confluent
Into the water inlet of feedwater pump lubricating oilses, oil emulsification the problems such as, improve the security of unit operation, and simple in construction, installation and maintenance
It is convenient；Here output pneumatic control valve 2 is provided with least one preceding water supply manual isolation valve 1 away from condenser a one end, supplies water
Measure pneumatic control valve 2 and be provided with least one rear water supply manual isolation valve 3, the preceding He of water supply manual isolation valve 1 close to condenser a one end
The setting of water supply manual isolation valve 3 facilitates the isolation inspection to the output pneumatic control valve 2 on sealing water water main pipe b afterwards
Repair；Here cistern water level self-regulation structure includes the ordinary water level detector of the relative eminence located at the inner side of recovery tank 18
14th, the warning line detector 17 of relative lower, the inner side of recovery tank 18 and the installed position for being higher than ordinary water level detector 14
Ball-cock assembly 15 is controlled provided with a high position, high position control ball-cock assembly 15 is connected with the overflow pipe 13 positioned at the outside of recovery tank 18, backwater
Low level control ball-cock assembly 19, low level control ball-cock assembly are provided with the inside of case 18 and less than the installed position of warning line detector 17
19 are connected with being connected one end on the connecting pipe d of recovery tank 18 and condenser 23 close to recovery tank 18, are set on connecting pipe d
There are the manual condenser isolating valve 22 that condenser 23 is isolated to recovery tank 18, warning line detector 17 and ordinary water level detection
The setting of device 14 improves the automatic early-warning function of the water level of recovery tank 18, high position control ball-cock assembly 15 and low level control ball-cock assembly 19
The balance for not only ensureing sealing water backwater amount and the water quantity sucked of condenser 23 is set, the water level of recovery tank 18 is maintained surely
It is fixed, to ensure that the vacuum of condenser 23 is not leaked there is provided guarantee；Here cistern water level self-regulation structure also includes and backwater
The moisturizing pipeline 9 of the top of case 18 connection, moisturizing pipeline 9 is provided with moisturizing pneumatic control valve 11, moisturizing pneumatic control valve 11 and control
Device processed is wiredly and/or wirelessly connected, and the bottom of recovery tank 18 is provided with the blow-off line e communicated therewith, and blow-off line e is provided with least
One manual blowdown isolating valve 16, the setting of moisturizing pipeline 9 and moisturizing pneumatic control valve 11 can be achieved into recovery tank 18 automatically
The function of moisturizing；Here moisturizing pneumatic control valve 11 is provided with least one preceding moisturizing manual isolation valve away from the one end of recovery tank 18
10, moisturizing pneumatic control valve 11 is provided with least one rear moisturizing manual isolation valve 12 close to the one end of recovery tank 18, and preceding moisturizing is manual
The setting of isolating valve 10 and rear moisturizing manual isolation valve 12 facilitates the isolation to the moisturizing pneumatic control valve 11 on moisturizing pipeline 9
Maintenance；Here backwater suction cylinder 21 is sealedly connected between recovery tank 18 and condenser 23, backwater suction cylinder 21 is connected and returns
The pipeline of water tank 18 is provided with the manual suction cylinder isolating valve 20 for being used for that backwater suction cylinder 21 to be isolated to recovery tank 18, water suction
The setting of cylinder 21 makes the tightness in condenser 23 further be ensured；Here backwater suction cylinder 21 is provided with suction
Cylinder discharge duct, discharge duct is provided with steam discharge isolating valve 24, for being aspirated during system initially puts into operation to vacuum in condenser
Cylinder 21 carries out water filling, ensures the operation of vacuum in condenser suction cylinder full water.
Further, here backwater gland steam exhauster 7 is connected between at the top of backwater main pipe c and recovery tank 18；Backwater main pipe c
Upper to be provided with least one backwater manual isolation valve 6 close to condenser a one end, the setting of backwater manual isolation valve 6 is easy to backwater
Main pipe c isolation, portion when being provided for Gas- liquid two-phase flow in exclusive segment operating mode lower water-back main pipe c of backwater gland steam exhauster 7
Divide steam, to eliminate the vapour locking of sealing water backwater, ensure the smooth of sealing water backwater；Here the top of recovery tank 18 offers this
Be closed state during plant running, maintenance when can open into the artificial detection hole 8 inside recovery tank 18, artificial detection hole 8
Set to facilitate maintenance and observe the inner facility of recovery tank 18 and ball-cock assembly 15 especially is controlled and low to the high position in recovery tank 18
Position control ball-cock assembly 19, while also allowing for cleaning of the recovery tank 18 during overhaul.
Operation principle：
The present apparatus should first carry out system water filling before putting into operation first, open what is set on the blow-off line on backwater suction cylinder 21
Manual suction cylinder isolating valve 20 between steam discharge isolating valve 24 and recovery tank 18 and backwater suction cylinder 21, is opened on moisturizing pipeline 9
Moisturizing pneumatic control valve 11, system starts water filling, after blow-off line water breakthrough on backwater suction cylinder 21, illustrates that backwater is aspirated
Cylinder 21 is already filled with water, and the steam discharge isolating valve 24 on the blow-off line on backwater suction cylinder 21 is closed, built in present apparatus vacuum
After vertical and system water filling is finished, the manual condenser isolating valve 22 between backwater suction cylinder 21 and condenser 23 is opened, system is opened
Beginning bringing normally into operation；Water supply process of the present apparatus during bringing normally into operation be：Sealing Water for Feedwater Pump on water main pipe b by setting
Output pneumatic control valve 2 supply water temperature and backwater that are detected by supply water temperature detector 4, return water temperature detector 5
Temperature data automatically adjusts to the sealing water output of feed pump, and the water supply of Sealing Water for Feedwater Pump is general using the solidifying of system
Bear water, pressure general control is 2 to 3MPa, and its return water temperature general control is below 65 DEG C, and supply backwater temperature difference is no more than 10
DEG C, preceding water supply manual isolation valve 1 and rear water supply manual isolation valve 3 are set respectively before and after output pneumatic control valve 2, to convenient
Isolation maintenance to output pneumatic control valve 2；The backwater removal process of Sealing Water for Feedwater Pump is：Backwater passes through backwater main pipe c
Recovery tank 18 is flow to, by setting backwater manual isolation valve 6 on backwater main pipe c, to Sealing Water for Feedwater Pump backwater main pipe c
Isolation, because the backwater of Sealing Water for Feedwater Pump is under actual operating mode and non-aqueous single-phase flow, but steam water interface
Two phase flow, by the backwater gland steam exhauster 7 set at backwater main pipe c to the top of recovery tank 18 or top, for exclusive segment operating mode
Some vapor in lower sealing water backwater main pipe c during Gas- liquid two-phase flow, to eliminate the vapour locking of sealing water backwater, ensures sealing water
Backwater it is smooth, artificial detection hole 8 is set on recovery tank 18, for the high-order control ball-cock assembly 15 and low level in recovery tank 18
Control ball-cock assembly 19 is overhauled and cleaning of the recovery tank 18 during overhaul, and the water level of recovery tank 18 typically maintains to set normally
More than the measuring point of level switch 14, the backwater of Sealing Water for Feedwater Pump is by the swabbing action of the vacuum in condenser 23, automatically
It is recovered in condenser 23, the water level of recovery tank 18 is by controlling the connecting pipe d's between recovery tank 18 and backwater suction cylinder
The low level control ball-cock assembly 19 of opening and closing automatically adjusts, when the water level of recovery tank 18 is higher than setting ordinary water level detector 14
During more than measuring point certain position, low level control ball-cock assembly 19 is shown in a fully open operation, when the water level of recovery tank 18 is less than setting warning water
During the measuring point of bit detector 17, low level control ball-cock assembly 19 is in full off state, and low level controls ball-cock assembly 19 when normally running
Automatically maintain certain aperture, ensure sealing water backwater amount and the balance of the water quantity sucked of condenser 23, when the water level of recovery tank 18 due to
When the suction of the vacuum of condenser 23 causes the water level of recovery tank 18 less than the measuring point for setting ordinary water level detector 14, the water level measuring point
Send the water level low signal of recovery tank 18 to alarm to controller, when the water level of recovery tank 18 continues to reduce and examines less than setting warning line
When surveying the measuring point of device 17, ordinary water level detector 14 sends alarm signal to controller, reminds operations staff to note, while automatically
The moisturizing pneumatic control valve 11 on moisturizing pipeline 9 is opened, recovery tank 18 starts moisturizing, when the water level of recovery tank 18 is normal higher than setting
During the measuring point of level switch 14, moisturizing pneumatic control valve 11 is closed automatically, while alarm signal disappears, because low level control is floating
The installation site of ball valve 19 is less than the installation site for setting warning line detector 17, so low level controls the position of ball-cock assembly 19
All the time it will not be connected with air, be not in the situation of device vacuum leak, under some special operation conditions：Such as recovery tank 18 not
When normal or low level control ball-cock assembly 19 bite occurs and can not closed, due to the swabbing action of the vacuum of condenser 23, recovery tank
18 water level can further decline, when the water level of recovery tank 18 is less than the point for setting warning line detector 17, with recovery tank
The high-order control ball-cock assembly 15 that the overflow pipe 13 of the control water level of recovery tank 18 of 18 connections is opened and closed starts to completely close, it is ensured that return
Water tank 18 is in completely enclosed state, can also now ensure that present apparatus vacuum system is not leaked, simultaneously because condenser 23
Swabbing action, the backwater of Sealing Water for Feedwater Pump can also keep clear, it is to avoid sealing water backwater does not freely cause lubricating oil to intake
The occurrence of, the moisturizing pneumatic control valve 11 on moisturizing pipeline 9 in addition it is front and rear set respectively before moisturizing manual isolation valve
10 and moisturizing pneumatic control valve 11, for the isolation and maintenance to moisturizing pneumatic control valve 11, overflow is set on recovery tank 18
Pipeline 13 and blow-off line e, overflow pipe 13 can connect rhone, automatic overflow during for 18 full water of recovery tank, normal
Water tank 18, by the same atmosphere of overflow pipe 13, has ensured that sealing water backwater pushes back water as nothing and can passed through to operating condition next time
The discrepancy in elevation of system arrangement is smoothly returned in recovery tank 18, and manual blowdown isolating valve 16 is set on blow-off line e, for pair
Blow-off line e blowdown and isolation, manual condenser isolating valve 22 is set between backwater suction cylinder 21 and condenser 23, is easy to
Isolation under emergency is carried out to system；The installation site and arrangement form of the present apparatus are more flexible, for condenser 23
The installation site of pump orifice can be right to play a part of reducing refined condensate treatment amount as far as possible close to its throat position
For the Air-cooled Unit that vacuum is changed greatly, its position can be reduced suitably, as long as ensureing present apparatus actual motion work
The suction height corresponding to the minimum vacuum of condenser 23 under condition.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more used herein condenser a, water main pipe b, backwater main pipe c, connecting pipe d, blow-off line e,
Preceding water supply manual isolation valve 1, output pneumatic control valve 2, rear water supply manual isolation valve 3, supply water temperature detector 4, backwater temperature
Spend detector 5, backwater manual isolation valve 6, backwater gland steam exhauster 7, artificial detection hole 8, moisturizing pipeline 9, preceding moisturizing manual isolation valve
10th, moisturizing pneumatic control valve 11, rear moisturizing manual isolation valve 12, overflow pipe 13, ordinary water level detector 14, high-order control are floating
Ball valve 15, manual blowdown isolating valve 16, warning line detector 17, recovery tank 18, low level control ball-cock assembly 19, manual suction cylinder
The terms such as isolating valve 20, backwater suction cylinder 21, manual condenser isolating valve 22, condenser 23, steam discharge isolating valve 24, but do not arrange
Except the possibility using other terms.It is used for the purpose of more easily describing and explaining the essence of the present invention using these terms；
Any additional limitation is construed as all to disagree with spirit of the present invention.
Claims (10)
1. a kind of Sealing Water for Feedwater Pump is automatically controlled and retracting device, the present apparatus and controller are wiredly and/or wirelessly connected, and it is wrapped
Include and be sealedly attached to condenser respectively（a）The water main pipe of input, output end（b）With backwater main pipe（c）, it is characterised in that：
Described water main pipe（b）With backwater main pipe（c）Upper close is provided with automatic water-supply adjusting part, described backwater main pipe（c）Sealing
It is connected to recovery tank（18）, described recovery tank（18）With condenser（23）Connection, described recovery tank（18）Provided with its
Energy and condenser during running status（23）The cistern water level self-regulation structure being tightly connected, described automatic water-supply adjusting part
It is connected respectively with described controller with cistern water level self-regulation structure.
2. Sealing Water for Feedwater Pump according to claim 1 is automatically controlled and retracting device, it is characterised in that described is automatic
Water supply adjusting part includes being located at water main pipe（b）On output pneumatic control valve（2）, described output pneumatic control valve
（2）With condenser（a）Between be provided with least one supply water temperature detector（4）, described backwater main pipe（c）Upper close condenser
（a）End is provided with least one return water temperature detector（5）, described output pneumatic control valve（2）, supply water temperature detector
（4）With return water temperature detector（5）Wiredly and/or wirelessly it is connected with described controller respectively.
3. Sealing Water for Feedwater Pump according to claim 2 is automatically controlled and retracting device, it is characterised in that described water supply
Measure pneumatic control valve（2）Away from condenser（a）One end is provided with least one preceding water supply manual isolation valve（1）, described output
Pneumatic control valve（2）Close to condenser（a）One end is provided with least one rear water supply manual isolation valve（3）.
4. Sealing Water for Feedwater Pump according to claim 1 is automatically controlled and retracting device, it is characterised in that described water tank
Water auto-regulation structure includes being located at recovery tank（18）The ordinary water level detector of the relative eminence of inner side（14）, relative lower
Warning line detector（17）, described recovery tank（18）Inner side and higher than described ordinary water level detector（14）Installation
Provided with high-order control ball-cock assembly at position（15）, described high-order control ball-cock assembly（15）With positioned at recovery tank（18）Outside overflow
Flow tube road（13）Connection, described recovery tank（18）Inner side and less than described warning line detector（17）Installed position
Ball-cock assembly is controlled provided with low level（19）, described low level control ball-cock assembly（19）Be connected described in recovery tank（18）And condenser
（23）Connecting pipe（d）Upper close recovery tank（18）One end be connected, described connecting pipe（d）It is provided with condenser
（23）It is isolated from recovery tank（18）Manual condenser isolating valve（22）.
5. Sealing Water for Feedwater Pump according to claim 4 is automatically controlled and retracting device, it is characterised in that described water tank
Water auto-regulation structure also includes and recovery tank（18）The moisturizing pipeline of top connection（9）, described moisturizing pipeline（9）On set
There is moisturizing pneumatic control valve（11）, described moisturizing pneumatic control valve（11）Wiredly and/or wirelessly it is connected with described controller,
Described recovery tank（18）Bottom is provided with the blow-off line communicated therewith（e）, described blow-off line（e）It is provided with least one
Manual blowdown isolating valve（16）.
6. Sealing Water for Feedwater Pump according to claim 5 is automatically controlled and retracting device, it is characterised in that described moisturizing
Pneumatic control valve（11）Away from recovery tank（18）One end is provided with least one preceding moisturizing manual isolation valve（10）, described moisturizing gas
Dynamic regulating valve（11）Close to recovery tank（18）One end is provided with least one rear moisturizing manual isolation valve（12）.
7. Sealing Water for Feedwater Pump according to claim 1 is automatically controlled and retracting device, it is characterised in that described backwater
Case（18）With condenser（23）Between be sealedly connected with backwater suction cylinder（21）, the described backwater suction cylinder of connection（21）And backwater
Case（18）Pipeline be provided with and be used for backwater suction cylinder（21）It is isolated from recovery tank（18）Manual suction cylinder isolating valve（20）.
8. Sealing Water for Feedwater Pump according to claim 7 is automatically controlled and retracting device, it is characterised in that described backwater
Suction cylinder（21）Suction cylinder discharge duct is provided with, described suction cylinder discharge duct is provided with steam discharge isolating valve（24）.
9. automatically controlled and retracting device according to any described Sealing Water for Feedwater Pump of claim 1 to 8, it is characterised in that institute
The backwater main pipe stated（c）And recovery tank（18）Backwater gland steam exhauster is connected between top（7）；Described backwater main pipe（c）On lean on
Nearly condenser（a）One end is provided with least one backwater manual isolation valve（6）.
10. Sealing Water for Feedwater Pump according to claim 9 is automatically controlled and retracting device, it is characterised in that described returns
Water tank（18）Top can be opened when being closed state, maintenance when offering present apparatus operation enters recovery tank（18）Internal is artificial
Detection hole（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316155.XA CN107165854B (en) | 2017-05-08 | 2017-05-08 | Automatic control and recovery device for sealing water of water supply pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710316155.XA CN107165854B (en) | 2017-05-08 | 2017-05-08 | Automatic control and recovery device for sealing water of water supply pump |
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| CN107165854A true CN107165854A (en) | 2017-09-15 |
| CN107165854B CN107165854B (en) | 2023-11-14 |
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| CN201710316155.XA Active CN107165854B (en) | 2017-05-08 | 2017-05-08 | Automatic control and recovery device for sealing water of water supply pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542325A (en) * | 2019-09-26 | 2019-12-06 | 岭澳核电有限公司 | Condenser vacuum system of nuclear power station |
| CN114704458A (en) * | 2022-04-02 | 2022-07-05 | 中国电建集团江西省电力设计院有限公司 | 9H cascade closes sealed water system of steam-driven feed pump of circulation gas unit |
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Cited By (3)
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| CN110542325A (en) * | 2019-09-26 | 2019-12-06 | 岭澳核电有限公司 | Condenser vacuum system of nuclear power station |
| CN110542325B (en) * | 2019-09-26 | 2021-03-02 | 岭澳核电有限公司 | Condenser vacuum system of nuclear power station |
| CN114704458A (en) * | 2022-04-02 | 2022-07-05 | 中国电建集团江西省电力设计院有限公司 | 9H cascade closes sealed water system of steam-driven feed pump of circulation gas unit |
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| CN107165854B (en) | 2023-11-14 |
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Address after: 310030 No. 10 West Garden Road, West Lake science and technology economic Park, Xihu District, Hangzhou, Zhejiang Applicant after: HUADIAN ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Address before: 310030 No. 10 West Garden Road, West Lake science and technology economic Park, Xihu District, Hangzhou, Zhejiang Applicant before: Huadian Electric Power Research Institute |
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