CN110486709A - A kind of nuclear power station steam generator drainage - Google Patents
A kind of nuclear power station steam generator drainage Download PDFInfo
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- CN110486709A CN110486709A CN201910753353.1A CN201910753353A CN110486709A CN 110486709 A CN110486709 A CN 110486709A CN 201910753353 A CN201910753353 A CN 201910753353A CN 110486709 A CN110486709 A CN 110486709A
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- water
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
Abstract
This application involves steam turbine for nuclear power station auxiliary system technical fields, more particularly to a kind of nuclear power station steam generator drainage, mainly include heat-exchange device, remove salt bed, filter device, water seal arrangement, condensing plant and throttling set, wherein, throttling set is set on the pipeline between water seal arrangement and condensing plant, for carrying out throttling control to the pure water of decline segment pipe output, to increase the hydraulic pressure in decline segment pipe and reduce the siphonage inside decline segment pipe.Due to being provided with throttling set on the pipeline between water seal arrangement and condensing plant, throttling control effectively can be carried out to the pure water flowed through using the throttling set, by the siphonage for increasing the hydraulic pressure in water seal arrangement in decline segment pipe to reduce inside decline segment pipe, to eliminate the abnormal sound and water hammer at the top of water seal arrangement or in decline segment pipe.
Description
Technical field
The present invention relates to steam turbine for nuclear power station auxiliary system technical fields, and in particular to a kind of nuclear power station steam generator row
Dirty system.
Background technique
Nuclear energy power generation is a kind of important new energy power generation technology, with the chemical energy of nuclear fission energy proxy mineral fuel, with
Nuclear reactor and steam generator replace the boiler of thermal power generation, is generated electricity with steam drive steam turbine.Currently, nuclear power unit
It mainly include the equipment such as nuclear reactor, steam generator, steam turbine, generator and power regulation and control system, wherein steam hair
Raw device drainage (APG for short system) is a circuit system closely related with steam generator, carry collection and
The sewage effluent of steam generator is handled to recycle heat and to be multiplexed the function of secondary circuit water.It is given in steam generator secondary side
In water, secondary circuit make-up water or Steam Condenser Leak bring impurity can be concentrated with the continuous evaporation of water supply and remain in steaming
In vapour generator, the operation water quality of the secondary side water of steam generator is destroyed, it is therefore necessary to carry out blowdown.
Under normal conditions, the normal function of APG system is to collect and handle the hydrophobic of steam generator, carries out chemistry and puts
Penetrating property processing, by hydrophobic Water-quality control in limit value, to be used further to secondary circuit or to be discharged into environment.In APG system with steaming
The secondary side of vapour generator is connected directly part to containment penetration subparticipation containment barrier function；In containment,
There is the by-pass line for leading to core sampling system on the blow-off line of every steam generator；Outside containment, every steam
The blow-off line of generator is pooled to a main pipe, carries out hydrophobic purified treatment hence into APG system.
However, can have some abnormal phenomenons toward contact, such as pipe vibration, pipe memory in APG system operation
In abnormal sound etc., especially at the inverted-loop tube (structure is equivalent to a water seal) on the pipeline of condenser, such phenomenon is especially bright
It is aobvious.If such phenomenon long-term existence, it will cause Pipeline damage, it is also possible to bring the potential threats such as shutdown inspection, shutdown maintenance.
Nuclear energy power generation all has nuclear energy technology, safe O&M and emergency scheduling compared to other power production processes, production process
Harsh requirement, some serious Nuclear Power Accidents for destroying ecological environment tighten one's nerve constantly by the staff of nuclear power station, it is necessary to
Guarantee the absolute safety of nuclear power production.Therefore, the misoperation phenomenon of discovery APG system and high maintenance are maintenances in time
The beneficial project of nuclear power unit safe operation, brings help to the maintenance work of nuclear power station.
Summary of the invention
The present invention solves the technical problem of in the pipe vibration how avoided in steam generator blowdown system, pipe
There are the abnormal phenomenon of abnormal sound, with the safe running performance of maintenance system as far as possible.In order to solve the above technical problems, the application provides
A kind of nuclear power station steam generator drainage includes:
Heat-exchange device is connect with the drain water piping of steam generator, and the heat-exchange device is for sending out the steam
Hydrophobic being cooled down to export cooling water of raw device generation, so that the hydrophobic temperature is reduced under preset temperature；
Except salt bed, it is attached with the heat-exchange device, for receiving the cooling water of the heat-exchange device output, and
The salinity dissolved in the cooling water is removed to export demineralized water；
Filter device, with described except salt bed is connect, for receiving the demineralized water except salt bed output, and to the desalination
Water carries out salt particle filtering to export pure water；
Water seal arrangement, rising segment pipe and decline segment pipe including top connection；The rising segment pipe and the mistake
Device connection is filtered, for receiving the pure water of the filter device output, and forms water seal to maintain the heat-exchange device extremely
The hydraulic pressure in pipeline between the water seal arrangement；
Condensing plant is connect with the decline segment pipe of the water seal arrangement, for receiving the decline segment pipe output
Pure water, and the pure water is condensed to export condensed water, the condensed water is for being back to the steam generator
Water work to be re-used；
Throttling set, on the pipeline between the water seal arrangement and the condensing plant, for the descending branch
The pure water of pipeline output carries out throttling control, to increase the hydraulic pressure in the decline segment pipe and reduce the decline segment pipe
Internal siphonage.
The water seal arrangement is inverted U-shaped, and both ends have opening, and inside is equipped with the chamber with the open communication at both ends,
The rising segment pipe is formed on the opening of one end to top, and the decline segment pipe is formed on opening to the top of the other end；It is described
Pure water is used to flow into from the opening of one end and flow out from the opening of the other end；The range of the absolute altitude of the water seal arrangement is 10-
29m。
The throttling set is orifice plate, and the orifice plate is set to the water inlet end of the condensing plant with described pure to what is flowed through
Water purification carries out throttling control；The diameter of pipeline where the aperture of the orifice plate is less than the orifice plate.
The throttling set is main road valve, the main road valve be set to the water seal arrangement and the condensing plant it
Between pipeline minimum point at；The main road valve is used to save the pure water flowed through when changing the aperture of itself
Flow control.The absolute altitude of the main road valve is 0m.
The throttling set is bypass valve, and the bypass valve is set to the decline segment pipe and ascent stage pipe
Between road；The bypass valve is used to carry out throttling control to the pure water flowed through when opening.The bypass valve
Absolute altitude is 10m.The absolute altitude of the condensing plant is 5m.
The heat-exchange device includes the first cooler and the second cooler being set side by side, and first cooler is non-
Regenerative heat exchange structure, second cooler are regenerative heat exchange structure；It is described hydrophobic into first cooler
Or make the temperature of itself will be down under 56 DEG C after second cooler.
The heat-exchange device and the pipeline except between salt bed are equipped with control valve, the control valve for pair
By the cooling water carry out decompression or flow control；
The water inlet end except salt bed is equipped with first filter, and the first filter is used for described except salt bed to entering
Cooling water is filtered for the first time, to filter out the impurity in the cooling water；
Row in parallel therewith is equipped on the first filter, the connecting pipe for removing salt bed and the filter device
Dirty pipeline, the blow-off line are equipped with the first valve and the second valve and set between first valve and the second valve
There is the first sewage draining exit；First valve is used to discharge the cooling water when opening, and second valve is used for
The pure water is discharged when opening；
The low side of the decline segment pipe in the water seal arrangement is equipped with third valve and the second sewage draining exit, the third
Valve is used to discharge the pure water when opening；
The water outlet of the condensing plant to the pipeline between the water work of the steam generator adds equipped with low pressure
Hot device and feed-water deaerator, the condensed water that the low-pressure heater is used to export the condensing plant heats, described to give
Water oxygen-eliminating device is used to remove the oxygen in the condensed water after heating.
The beneficial effect of the application is:
It mainly include heat-exchange device, desalination according to a kind of nuclear power station steam generator drainage of above-described embodiment
Bed, filter device, water seal arrangement, condensing plant and throttling set, wherein the drain water piping of heat-exchange device and steam generator
Connection, for by steam generator generate it is hydrophobic cooled down to export cooling water so that hydrophobic temperature be reduced to it is pre-
If temperature under；Except salt bed and heat-exchange device are attached, for receiving the cooling water of heat-exchange device output, and remove
The salinity dissolved in cooling water is to export demineralized water；Filter device is connect with salt bed is removed, for receiving the desalination for removing salt bed output
Water, and salt particle filtering is carried out to export pure water to demineralized water；Water seal arrangement includes the rising segment pipe of top connection under
Segment pipe drops, which connect with filter device, the pure water exported for receiving filter device, and formation water seal with
Maintain the hydraulic pressure in heat-exchange device to the pipeline between water seal arrangement；The decline segment pipe of condensing plant and water seal arrangement connects
It connects, for receiving the pure water of decline segment pipe output, and pure water is condensed to export condensed water, condensed water is used for back
The water work of steam generator is flow to be re-used；Throttling set is set to the pipe between water seal arrangement and condensing plant
On road, for carrying out throttling control to the pure water of decline segment pipe output, to increase hydraulic pressure and the reduction in decline segment pipe
Decline the siphonage inside segment pipe.In a first aspect, due to being provided on the pipeline between water seal arrangement and condensing plant
Throttling set effectively can carry out throttling control to the pure water flowed through using the throttling set, by increasing water seal arrangement
Hydraulic pressure in middle decline segment pipe reduces the siphonage inside decline segment pipe, to eliminate at the top of water seal arrangement or decline
Abnormal sound and water hammer in segment pipe；Second aspect, since the water inlet end in condensing plant is provided with orifice plate as throttling set,
And the aperture of orifice plate be less than the orifice plate where the diameter of pipeline can be with so that pure water generates throttle effect when flowing through orifice plate
The internal pressure for declining segment pipe in water seal arrangement is effectively raised, to offset the siphonage inside pipeline, and then eliminates water
Abnormal sound and water hammer in seal apparatus；The third aspect, due to being set at the minimum point of the pipeline between water seal arrangement and condensing plant
Main road valve has been set as throttling set, which carries out pure water when playing the aperture for changing itself
Throttle the effect controlled, then when water hammer occurs for the decline segment pipe of water seal arrangement, so that it may by turning down the main road
Valve declines the internal pressure of segment pipe to raise, and can effectively cancel out siphonage, eliminates abnormal sound and water hammer；Four directions
Face, due to being provided with bypass valve between decline segment pipe and rising segment pipe as throttling set, so that pure water flow
It is directly reached through the bypass valve in decline segment pipe, the top of water seal arrangement is needed not move through, so that water seal arrangement be effectively relieved
The air pressure inside at top realizes the function of offsetting siphonage inside pipeline, eliminate abnormal sound and water hammer；5th aspect, due to setting
The absolute altitude for setting condensing plant is 5m, so that overpressure required when pure water is by decline segment pipe arrival condensing plant increases
Add, to inhibit to decline the siphonage inside segment pipe, achievees the purpose that eliminate abnormal sound and water hammer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of nuclear power station steam generator blowdown system in the application；
Fig. 2 is the structural schematic diagram of nuclear power station steam generator blowdown system in the first specific embodiment；
Fig. 3 is the structural schematic diagram of nuclear power station steam generator blowdown system in second of specific embodiment；
Fig. 4 is the structural schematic diagram of nuclear power station steam generator blowdown system in the third specific embodiment；
Fig. 5 is the structural schematic diagram of nuclear power station steam generator blowdown system in the 4th kind of specific embodiment.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
In APG system, inverted-loop tube is often equipped on the pipeline of condenser, the highest point of the inverted-loop tube can be set
In+29.00m (relative to height above sea level), it is filtered it is hydrophobic flowed upwardly into from the side of inverted-loop tube and through the other side to flowing down
Out, final return water is to condenser.The side that this structure of inverted U pipe causes it to flow upwardly into is equivalent to a water seal, water seal
Purpose be to guarantee to make upstream in steam generator blowdown system stoppage in transit event to avoid up-stream system from being evacuated or empty
At system above atmospheric pressure, the high water level of water seal can be located at the above 12m of filter absolute altitude.Here inverted U pipe is APG
One of key device of system, to the pressure adjustment process of APG system middle and upper reaches pipeline, to the water supply of steam generator, hydrophobic
Adjustment process, and the safe and stable operation process of entire nuclear power unit is all played a crucial role.It is sent out in steam
In the operational process of raw device drainage (APG system), since the change of the hydrophobic flow in upstream or hydraulic pressure often makes inverted U
Water hammer occurs for the inside of pipe, especially in the descending branch of inverted-loop tube, can be generated in pipeline at this time it is clear it is audible " crack "
Clear and melodious abnormal sound.In fault detection operation at the scene, using reflectoscope inspection it can be found that there are one at the top of inverted-loop tube
The headroom for determining volume may indicate that there are two phase flows with descending branch at the top of inverted-loop tube by analysis, and the vapour of two phase flow is again
It is secondary be condensed into water during form water hammer.It is thus regarded that water hammer causes scene to have clear and melodious abnormal sound, pipe vibration
Main cause.The generation of the phenomenon that avoid water hammer from causing pipe vibration increase, trommel, piping failure, provides here
A kind of technical solution is transformed existing steam generator blowdown system.
So, the inventive concept of technical scheme is: in the operation of steam generator blowdown system (APG system)
Cheng Zhong, it is necessary to water seal arrangement (i.e. inverted-loop tube) is set to form water seal, avoid the front-end pipelines of water seal arrangement be evacuated or
Emptying guarantees that APG system is in atmospheric pressure or more；However, the upper end position meeting at the top of water seal arrangement and decline segment pipe
Water hammer is formd during being condensed into water again due to the vapour of two phase flow, brings abnormal sound and damage to threaten for decline segment pipe.
Generate water hammer immediate cause be at the top of inverted-loop tube and decline segment pipe memory two-phase flow phenomenon, essence the reason is that
Overpressure deficiency in the top and decline segment pipe of inverted U pipe causes the siphonage inside pipeline to enhance.To overcome water
The steam generator blowdown system of nuclear power station is transformed in water hammer in seal apparatus, the technical program, utilizes setting
Throttling set throttling control effectively is carried out to the pure water flowed through, pass through increase water seal arrangement in decline segment pipe in water
It presses to reduce the siphonage inside decline segment pipe, to eliminate the abnormal sound and water at the top of water seal arrangement or in decline segment pipe
Hammer.
Embodiment one,
Referring to FIG. 1, the application discloses a kind of nuclear power station steam generator drainage, water in pipeline can be effectively prevented
The generation of hammer phenomenon, the nuclear power station steam generator drainage 1 mainly include heat-exchange device 11, except salt bed 12, filtering dress
13, water seal arrangement 14, condensing plant 15 and throttling set 16 are set, is illustrated separately below.
Heat-exchange device 11 is connect with the drain water piping of steam generator, which is used for steam generator
The hydrophobic of generation is cooled down to export cooling water, by the refrigerating function of heat-exchange device 11 hydrophobic temperature is reduced to
Under preset temperature.
Except salt bed 12 and heat-exchange device 11 are attached, for receiving the cooling water of the output of heat-exchange device 11, and go
Except the salinity dissolved in cooling water is to export demineralized water.
Filter device 13 is carried out with except salt bed 12 is connect for receiving the demineralized water for removing salt bed 12 and exporting, and to demineralized water
Salt particle is filtered to export pure water.
Water seal arrangement 14 includes the rising segment pipe 141 and decline segment pipe 142 of top connection；Wherein, rise segment pipe
141 connect with filter device 13, for receiving the pure water of the output of filter device 13, and form water seal to maintain heat-exchange device
Hydraulic pressure in 11 to the pipeline between water seal arrangement 14.It is appreciated that it is higher than the position of filter device 13 to rise segment pipe 141
Many out, the pure water that gravity causes to rise in segment pipe 141 forms hydraulic pressure to upstream line, when this hydraulic pressure is conducive to
It carves ground to maintain to fill up water in upstream line, and the situation for being evacuated or emptying is avoided to occur.
Condensing plant 15 is connect with the decline segment pipe 142 of water seal arrangement 14, for receiving the decline output of segment pipe 142
Pure water, and pure water is condensed to export condensed water, the condensed water exported here is for being back to steam generator
Water work is to be re-used.
Throttling set 16 is set on the pipeline between water seal arrangement 14 and condensing plant 15, for decline segment pipe 142
The pure water of output carries out throttling control, to increase the hydraulic pressure in decline segment pipe 142 and reduce the rainbow inside decline segment pipe
Suction effect.
In the present embodiment, water seal arrangement is inverted U-shaped, and both ends have opening, and inside is equipped with to be connected with the opening at both ends
Logical chamber, opening to the top of one end, which is formed, rises segment pipe 141, and decline segment pipe is formed on opening to the top of the other end
142.So, it is used to flow into from the opening of one end and flow out from the opening of the other end by the pure water that filter device 13 exports.
In the present embodiment, it in order to guarantee that water seal arrangement 14 forms effective inner pipe water pressure to upstream line, can be set
The range of the absolute altitude of water seal arrangement 14 is 10-29m, it is therefore preferable to 22m or 29m.
It should be noted that main road valve 162, bypass valve 163 involved in the present embodiment can be according to actual needs
And flexible configuration, be such as configured to room temperature work use pipe valve shape valve, cock and ball valve, gated type valve, rotation open shape
Valve, butterfly valve, slide valve shape valve, here with no restrictions.
It should be noted that " absolute altitude " involved in the present embodiment refers between mean sea level and somewhere highest point (face)
Vertical range.The datum level of China's measurement absolute altitude, is the annual sea level of the Huanghai Sea, traditionally claims absolute altitude to " height above sea level ".
In first specific embodiment, referring to fig. 2, orifice plate 161 is set by throttling set 16, the orifice plate 161 setting
In the water inlet end of condensing plant 15 to carry out throttling control to the pure water flowed through.What needs to be explained here is that the hole of orifice plate 161
Diameter can be set to the diameter less than 161 place pipeline of orifice plate；For example, orifice plate then can be set when the diameter of pipeline is 39mm
161 aperture is a standard value in 10-30mm.
It should be noted that orifice plate is the principle by throttling set, the detection member of measurement liquid, gas and steam flow
Part.Standard orifice plate is one piece of sheet metal with circular opening, circular hole wall and orifice plate front end face into right angle, hole board shaft when installation
The heart is concentric with conduit axis.In actual application, orifice plate has international standard (ISO 5167), as long as measuring hole board ends pressure
Difference can calculate the flow value with certain accuracy by this standard.So no longer orifice plate is described in detail here.
In second specific embodiment, referring to Fig. 3, main road valve 162 is set by throttling set 16, the main road valve
162 are set at the minimum point of the pipeline between water seal arrangement 14 and condensing plant 15.In this way, the main road valve 162 can be real
The function of throttling control is carried out when changing the aperture of itself now to the pure water flowed through.In order to reach better restriction effect,
The absolute altitude that main road valve 162 can be set is 0m.
In third specific embodiment, referring to fig. 4, bypass valve 163 is set by throttling set 16, the bypass valve
It is set to decline segment pipe and rises between segment pipe.In this way, the bypass valve 163 may be implemented when opening (such as full gate)
The function of throttling control is carried out to the pure water flowed through.In order to realize higher throttling control effect, bypass valve can be set
163 absolute altitude is 10m, so that corresponding 1 standard atmospheric pressure 101.325kpa at absolute altitude 10m, meets in upstream line
Overpressure requirement.
In the 4th specific embodiment, referring to Fig. 5, the absolute altitude that condensing plant 15 can be set is 5m, increases descending branch
Pure water in pipeline 142 is delivered to the pressure of condensing plant 15.
It should be noted that any one specific embodiment in above-named four specific embodiments can be constituted
One complete technical solution, and individually carried out in nuclear power station steam generator drainage (i.e. APG system) using.Appoint
What technical solution effectively can carry out throttling control to the pure water flowed through in use, to increase water seal
Decline the hydraulic pressure in segment pipe 142 in device 14 to reduce the siphonage inside decline segment pipe 142, final elimination water seal dress
Set 14 tops or abnormal sound and water hammer in decline segment pipe.
It will be understood to those skilled in the art that in order to realize a kind of preferable technical effect, in a further embodiment
Above-named four embodiments can be used to nuclear power station steam generator drainage 1, constitute system as described in Figure 4
Structure.Technical staff can respectively adjust orifice plate 161, main road valve 162, bypass valve 163, condensing plant 15 accordingly
Section, jointly come increase in water seal arrangement 14 decline segment pipe 142 in hydraulic pressure come reduce decline segment pipe 142 inside siphon work
With the final abnormal sound and water hammer eliminated at the top of water seal arrangement 14 or in decline segment pipe.
In order to enable nuclear power station steam generator drainage 1 has good blowdown performance, and offset except water seal arrangement
Water hammer plays positive influence in 14, in the present embodiment can also to heat-exchange device 11, except salt bed 12, water seal arrangement 14,
The structure of condensing plant 15 or connection management improve, and are described as follows.
Further, heat-exchange device 11 may include the first cooler 111 and the second cooler 112 being set side by side,
Here the first cooler 111 uses non-regenerative heat exchange structure, and the second cooler 112 uses regenerative heat exchange structure.
So, hydrophobic to make the temperature of itself be (i.e. default down to 56 DEG C later into the first cooler 111 or the second cooler 112
Temperature) under, for guaranteeing that cooling water enters except enabling to after salt bed 12 carry out normal desalination work except salt bed 12.
Further, heat-exchange device 11 and except the pipeline between salt bed 12 be equipped with control valve 17, the control valve
17 for carrying out decompression or flow control to the cooling water passed through, it is preferable that the aperture of control valve is arranged, so that control valve
1.4MPa.g is not to be exceeded in 17 downstream pressure.
Further, except the water inlet end of salt bed 12 is equipped with first filter 18, which is used to remove entrance
The cooling water of salt bed is filtered for the first time, to filter out the impurity in cooling water.In this way, removing the front-end pipelines and rear end pipe of salt bed 12
Road is respectively arranged with first filter 18 and filter device 13, is filtered respectively to the demineralized water of the cooling water of input, output
Processing, guarantees higher effluent quality.
Nearly ground, in first filter 18, in parallel therewith except being equipped on the connecting pipe of salt bed 12 and filter device 13
Blow-off line (see the pipeline where appended drawing reference 191,192), which is equipped with the first valve 191 and the second valve
192 and between the first valve 191 and the second valve 192 be equipped with the first sewage draining exit 193.It is possible to switch when needed
First valve 191 or the second invention 192, so that the first valve 191 is used to pass through the 193 pairs of coolings of the first sewage draining exit when opening
Water is discharged, but also the second valve 192 is used to discharge pure water by the first sewage draining exit 193 when opening.
Further, the low side of the decline segment pipe 142 in water seal arrangement 14 is equipped with third valve 194 and the second sewage draining exit
195.It is possible to switch third valve 194 when needed, so that third valve 194 is used to carry out pure water when opening
Discharge.
Further, the water outlet of condensing plant 15 to the pipeline between the water work of steam generator is equipped with low pressure
Heater 196 and feed-water deaerator 197.So, low-pressure heater 196 here is used for the condensed water exported to condensing plant 15
It is heated, the condensed water after preheating is delivered to feed-water deaerator 197；Here feed-water deaerator 197 is for removing heating
The oxygen in condensed water afterwards.Then, the water after deoxygenation is delivered to the water flowed through by high-pressure heater by main feed pump
Carrying out secondary preheating can so realize so that higher water is transmitted to steam generator by regulating valve to APG system
The condensed water of output is re-used.
It will be understood to those skilled in the art that for the steam generator of nuclear power unit, also being answered referring to Fig. 1-5
Auxiliary feedwater storage box should be equipped with for it, it is therefore an objective to send out in the insufficient situation of condensate return of APG system output for steam
Raw device moisturizing, and the water in auxiliary feedwater storage box is delivered to by steam generator by auxiliary feed water pump and regulating valve.In addition,
For the steam generator of nuclear power unit, the steam generated reaches main steam bypass system, Huo Zhejing by isolating valve
It crosses isolating valve and reaches steam turbine generator.Since auxiliary feedwater process, turbine generator process are all the common with suit of nuclear power unit
It sets, so being no longer described in detail here.
It will be understood to those skilled in the art that can effectively eliminate nuclear power by the technical solution in above example
The running abnormal sound of steam generator blowdown system of standing and water hammer, and specifically bring following positive application effect:
(1) due to being provided with throttling set on the pipeline between water seal arrangement and condensing plant, the throttling set is utilized
Throttling control effectively can be carried out to the pure water flowed through, be subtracted by increasing the hydraulic pressure in water seal arrangement in decline segment pipe
Siphonage inside small decline segment pipe, to eliminate the abnormal sound and water hammer at the top of water seal arrangement or in decline segment pipe.
(2) since the water inlet end in condensing plant is provided with orifice plate as throttling set, and the aperture of orifice plate is less than institute
The diameter of pipeline can be raised effectively in water seal arrangement so that pure water generates throttle effect when flowing through orifice plate where stating orifice plate
Decline the internal pressure of segment pipe, to offset the siphonage inside pipeline, and then eliminates abnormal sound and water in water seal arrangement
Hammer
(3) due to being provided with main road valve at the minimum point of the pipeline between water seal arrangement and condensing plant as section
Device is flowed, the main road valve is enabled to carry out throttling control to pure water when playing the role of changing the aperture of itself, then
When water hammer occurs for the decline segment pipe of water seal arrangement, so that it may raise decline segment pipe by turning down the main road valve
Internal pressure, can effectively cancel out siphonage, eliminate abnormal sound and water hammer.
(4) due to being provided with bypass valve between decline segment pipe and rising segment pipe as throttling set, so that
Pure water flows through the bypass valve and directly reaches in decline segment pipe, the top of water seal arrangement is needed not move through, to be effectively relieved
Air pressure inside at the top of water seal arrangement realizes the function of offsetting siphonage inside pipeline, eliminate abnormal sound and water hammer.
(5) since the absolute altitude of setting condensing plant is 5m, so that pure water reaches condensing plant when institute by decline segment pipe
The overpressure needed greatly increases, to inhibit to decline the siphonage inside segment pipe, reaches the mesh for eliminating abnormal sound and water hammer
's.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of nuclear power station steam generator drainage characterized by comprising
Heat-exchange device is connect with the drain water piping of steam generator, and the heat-exchange device is used for the steam generator
The hydrophobic of generation is cooled down to export cooling water, so that the hydrophobic temperature is reduced under preset temperature；
It except salt bed, is attached with the heat-exchange device, for receiving the cooling water of the heat-exchange device output, and removes
The salinity dissolved in the cooling water is to export demineralized water；
Filter device connect with described except salt bed, for receiving the demineralized water exported except salt bed, and to the demineralized water into
Row salt particle is filtered to export pure water；
Water seal arrangement, rising segment pipe and decline segment pipe including top connection；The rising segment pipe and the filtering fill
Connection is set, for receiving the pure water of filter device output, and forms water seal to maintain the heat-exchange device to described
The hydraulic pressure in pipeline between water seal arrangement；
Condensing plant is connect with the decline segment pipe of the water seal arrangement, for receiving the pure of the decline segment pipe output
Water, and the pure water being condensed to export condensed water, the condensed water be used to be back to the steam generator to
Wetting system is to be re-used；
Throttling set, on the pipeline between the water seal arrangement and the condensing plant, for the decline segment pipe
The pure water of output carries out throttling control, to increase the hydraulic pressure in the decline segment pipe and reduce inside the decline segment pipe
Siphonage.
2. nuclear power station steam generator drainage as described in claim 1, which is characterized in that the water seal arrangement is U
Shape structure, both ends have opening, and inside is equipped with the chamber with the open communication at both ends, and opening to the top of one end is formed on described
Segment pipe is risen, the decline segment pipe is formed on opening to the top of the other end；The pure water is used to flow into from the opening of one end
And it is flowed out from the opening of the other end；The range of the absolute altitude of the water seal arrangement is 10-29m.
3. nuclear power station steam generator drainage as claimed in claim 2, which is characterized in that the throttling set is hole
Plate, the orifice plate are set to the water inlet end of the condensing plant to carry out throttling control to the pure water flowed through；The hole
The diameter of pipeline where the aperture of plate is less than the orifice plate.
4. nuclear power station steam generator drainage as claimed in claim 2, which is characterized in that the throttling set is main road
Valve, the main road valve are set at the minimum point of the pipeline between the water seal arrangement and the condensing plant；The master
Road valve is used to carry out throttling control to the pure water flowed through when changing the aperture of itself.
5. nuclear power station steam generator drainage as claimed in claim 4, which is characterized in that the absolute altitude of the main road valve
For 0m.
6. nuclear power station steam generator drainage as claimed in claim 2, which is characterized in that the throttling set is bypass
Valve, the bypass valve are set between the decline segment pipe and the rising segment pipe；The bypass valve is used for
Throttling control is carried out to the pure water flowed through when opening.
7. nuclear power station steam generator drainage as claimed in claim 6, which is characterized in that the absolute altitude of the bypass valve
For 10m.
8. such as nuclear power station steam generator drainage of any of claims 1-7, which is characterized in that the condensing
The absolute altitude of device is 5m.
9. such as nuclear power station steam generator drainage of any of claims 1-7, which is characterized in that the heat is handed over
Changing device includes the first cooler and the second cooler being set side by side, and first cooler is non-regenerative heat exchange knot
Structure, second cooler are regenerative heat exchange structure；The hydrophobic entrance first cooler or second cooling
Make after device the temperature of itself will be down under 56 DEG C.
10. such as nuclear power station steam generator drainage of any of claims 1-7, which is characterized in that the heat
Switch and the pipeline except between salt bed are equipped with control valve, and the control valve is for the cooling to passing through
Water carries out decompression or flow control；
The water inlet end except salt bed is equipped with first filter, and the first filter is used for the cooling to salt bed is removed described in
Water is filtered for the first time, to filter out the impurity in the cooling water；
Sewage pipe in parallel therewith is equipped on the first filter, the connecting pipe for removing salt bed and the filter device
Road, the blow-off line are equipped with the first valve and the second valve and are equipped with the between first valve and the second valve
One sewage draining exit；First valve is used to discharge the cooling water when opening, and second valve is for opening
When the pure water is discharged；
The low side of the decline segment pipe in the water seal arrangement is equipped with third valve and the second sewage draining exit, the third valve
For being discharged when opening to the pure water；
The water outlet of the condensing plant to the pipeline between the water work of the steam generator is equipped with low-pressure heater
And feed-water deaerator, the condensed water that the low-pressure heater is used to export the condensing plant heat, the water supply removes
Oxygen device is used to remove the oxygen in the condensed water after heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753353.1A CN110486709A (en) | 2019-08-15 | 2019-08-15 | A kind of nuclear power station steam generator drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753353.1A CN110486709A (en) | 2019-08-15 | 2019-08-15 | A kind of nuclear power station steam generator drainage |
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| Publication Number | Publication Date |
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| CN110486709A true CN110486709A (en) | 2019-11-22 |
Family
ID=68551333
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910753353.1A Pending CN110486709A (en) | 2019-08-15 | 2019-08-15 | A kind of nuclear power station steam generator drainage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570430A (en) * | 2020-04-24 | 2020-08-25 | 岭东核电有限公司 | Nuclear power station generator stator cooling system and anaerobic demineralized water flushing and replacing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570430A (en) * | 2020-04-24 | 2020-08-25 | 岭东核电有限公司 | Nuclear power station generator stator cooling system and anaerobic demineralized water flushing and replacing method thereof |
| CN111570430B (en) * | 2020-04-24 | 2022-04-19 | 岭东核电有限公司 | Nuclear power station generator stator cooling system and anaerobic demineralized water flushing and replacing method thereof |
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