CN209084739U - Sealing Water for Feedwater Pump system - Google Patents
Sealing Water for Feedwater Pump system Download PDFInfo
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- CN209084739U CN209084739U CN201821691404.XU CN201821691404U CN209084739U CN 209084739 U CN209084739 U CN 209084739U CN 201821691404 U CN201821691404 U CN 201821691404U CN 209084739 U CN209084739 U CN 209084739U
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- water
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- feedwater
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Abstract
The utility model relates to a kind of Sealing Water for Feedwater Pump systems.Sealing Water for Feedwater Pump system described in the utility model includes coagulator, condensate pump, oxygen-eliminating device, feed pump and the sealing element being mounted on feed pump for passing sequentially through pipeline connection, it further include drain tank, drainage pump, the condensate pump is also connected to the water inlet of sealing element, the water outlet of the sealing element is connected to the water inlet of drain tank, and the drain tank is connected to by drainage pump with oxygen-eliminating device.Sealing Water for Feedwater Pump system described in the utility model has the advantages that cost is relatively low, cooling effect is preferable, improves feed water quality to protect boiler, improve steam quality, deaerator level adjustment more conveniently.
Description
Technical field
The utility model relates to thermal power plant design fields, more particularly to a kind of Sealing Water for Feedwater Pump system.
Background technique
Feed pump is the important ancillary equipment of steam turbine, and rotating mechanical energy is changed into the pressure energy and kinetic energy of water supply by it,
Condensed water in oxygen-eliminating device is sent to boiler to provide the water supply under required pressure to boiler.
In order not to allow the water in feed pump to pass through feed pump axis and mechanical sealing member between gap leak, just from condensation
Jellyfish pipe or demineralized water main pipe draw a water source as sealing water.Further, since the water in feed pump is with certain high temperature
Water, this temperature can pass to bearing by the shaft or pump housing metal of pump, increase the temperature of bearing, in order to control this temperature
Unofficial biography, so sealing water also plays cooling effect.And when sealing water passes through sealing element, water exists with the high-speed rotation of axis
Moisture film is formed between axis and sealing element, prevents axis here and sealing element direct friction.
For the post-processing of sealing water, existing power plant generallys use following three kinds of technical solutions: 1, draining into sealing water
Trench；2, by vacuum in condenser to coagulator；3, by vacuum in condenser to the preposition pump intake of feed pump.For technical solution 1, make
At serious waste, unit make-up water percentage index is caused to occupy high.For technical solution 2, although having recycled the heat of sealing water absorption,
It is to be easy to cause the condensing water temperature for sealing feed pump higher, reduces sealing water to the cooling effect of feed pump.For
Technical solution 3, sealing water do not carry out deoxygenation processing, are easily damaged boiler.
In addition, being removed for Medium & small size power plant if the sealing water design of the mechanical seal of feed pump uses
Salt water not only increases demineralized water water workload, increases demineralized water water producing cost, and demineralized water is sealed by water supply pump machine
It leaks into pump, and be back to oxygen-eliminating device by pumping low-pressure end, causes deaerator level adjustment inconvenient.If deaerator level adjusts not
It is good, it is easy to cause oxygen-eliminating device to be easy full water overflow waste deaerated water.
Therefore, existing Sealing Water for Feedwater Pump system still has further improved space.
Utility model content
Based on this, the purpose of the utility model is to provide a kind of Sealing Water for Feedwater Pump system, have cost is relatively low,
Cooling effect is preferable, improves feed water quality to protect boiler, deaerator level adjustment more conveniently advantage.
A kind of Sealing Water for Feedwater Pump system includes the coagulator for passing sequentially through pipeline connection, condensate pump, oxygen-eliminating device, water supply
Pump and be mounted on the sealing element on feed pump, further include drain tank, drainage pump, the condensate pump also with the water inlet of sealing element
Mouth connection, the water outlet of the sealing element are connected to the water inlet of drain tank, and the drain tank is connected by drainage pump and oxygen-eliminating device
It is logical.
Compared with the existing technology, Sealing Water for Feedwater Pump system described in the utility model is using condensed water as water supply pump machine
The sealing water of tool sealing, reduces demineralized water water production, reduces water producing cost.Again since condensed water inherently utilizes condensate pump
Beating will not influence to oxygen-eliminating device so condensed water will not influence feed pump water supply even if condensed water can be leak into feed pump
The water level of oxygen-eliminating device adjusts.Then, sealing water is recycled by drain tank, it is on the one hand that the sealing water for absorbing sealing element heat is timely
It takes away, helps to improve cooling effect, on the other hand send sealing water to drain tank rather than send to coagulator or feed pump
Preposition pump intake helps to further improve cooling effect, it helps extend the service life of drainage pump, oxygen-eliminating device, and
Help to improve drainage pump, the working efficiency of oxygen-eliminating device, working effect.Finally, carrying out deoxygenation processing, recycling sealing to sealing water
The heat that water is absorbed into helps to improve the working efficiency of oxygen-eliminating device, is also beneficial to energy saving.It is dredged in addition, sealing water enters
The workload of deaerator level adjusting can be reduced after water tank, it is energy saving.
Further, the drain tank is also used to be connected to steam drainage pipeline.
By adopting the above technical scheme, the water of drain tank is that SCR heating steam drainage (saturated water) water temperature is higher, hydrophobic direct
Oxygen-eliminating device is returned with drainage pump, is easy that oxygen-eliminating device is made to generate spontaneous boiling phenomenon.Because the hydrophobic vapour of oxygen-eliminating device hydrophobic ought be entered
Change the steam generated to meet or more than oxygen-eliminating device vapour needs, then the water supply in oxygen-eliminating device can be made with regard to spontaneous boiling.Oxygen-eliminating device is certainly
Raw boiling consequence: 1, making oxygen-eliminating device pressure is more than service pressure, and super high pressure accident occurs when serious；2, make separation in oxygen-eliminating device
Gas is difficult to escape out, deteriorates deaerating effect；3, it causes steam turbine steam extraction to reduce heat loss and increases unit economy reduction.Cause
This, it is higher hydrophobic to reduce temperature using the lower sealing water of temperature, helps avoid the spontaneous boiling of oxygen-eliminating device, it helps
Extend drainage pump and machine seals service life.Meanwhile hydrophobic heat has also been recycled, the working efficiency of oxygen-eliminating device is helped to improve,
Be conducive to workload that is energy saving, and efficiently reducing deaerator level adjusting.
Further, further include sweet-water tank, desalination water pump, the sweet-water tank by desalination water pump and sealing element into
Mouth of a river connection.
By adopting the above technical scheme, it is spare to do to provide mostly a kind of Sealing Water for Feedwater Pump system, convenient for the maintenance of coagulator
Or maintenance.
Further, the sweet-water tank also passes through desalination water pump and is connected to the water inlet of oxygen-eliminating device.
By adopting the above technical scheme, for adjusting the water level of oxygen-eliminating device.
Further, the sweet-water tank passes through desalination water pump again and is connected to the water inlet of coagulator.
The water of coagulator is supplemented when by adopting the above technical scheme, for Qi Jiqian, low water level, bypath system also drops when running
Condensing water temperature in low coagulation device.
It further, further include sealing condensed water main pipe, and using the coagulator of at least two groups, the condensation
Water pump, every group of the coagulator pass through condensate pump and are connected to sealing condensed water main pipe, and condensation jellyfish is used in the sealing
The water inlet of pipe access sealing element.
By adopting the above technical scheme, when there is coagulator to damage or overhaul, guarantee also working there are also other coagulators,
Facilitate the normal operation in maintenance power plant.
Further, then including Sealing Water for Feedwater Pump pipe, the sweet-water tank passes sequentially through desalination water pump, water supply pump seal
Water pipe is connected to the water inlet of sealing element, the sealing with condensed water main pipe by Sealing Water for Feedwater Pump pipe access sealing element into
The mouth of a river
In order to better understand and implement, according to the present invention will be described in detail below with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of former condensate system；
Fig. 2 is the structural schematic diagram of the Sealing Water for Feedwater Pump system of the utility model；
Appended drawing reference:
10, coagulator；11, condensate pump；12, condensed water main pipe；13, sealing condensed water pipe；14, sealing condensation
Jellyfish pipe；15, Sealing Water for Feedwater Pump pipe；20, oxygen-eliminating device；30, feed pump；31, sealing element；40, boiler；50, sweet-water tank；
51, desalination water pump；52, demineralized water main pipe；53, demineralized water pipe；60, drain tank；61, drainage pump；62, steam drainage pipeline.
Specific embodiment
A kind of Sealing Water for Feedwater Pump system, referring to Fig. 1 and Fig. 2, including two coagulator 10, two condensate pumps
11, oxygen-eliminating device 20, feed pump 30, boiler 40, sweet-water tank 50, desalination water pump 51, the sealing element 31 being mounted on feed pump 30.
Wherein, the corresponding condensate pump 11 of a coagulator 10, and the water inlet of the water outlet access condensate pump 11 of coagulator 10
Mouthful.The water outlet of condensate pump 11 accesses condensed water main pipe 12, and is connected to by the condensed water main pipe 12 with oxygen-eliminating device 20.Together
When, brine tank is filled with demineralized water to oxygen-eliminating device 20 to adjust 20 water level of oxygen-eliminating device by desalination water pump 51, and brine tank is also logical
It crosses desalination water pump 51 and supplements water to coagulator 10.Then, oxygen-eliminating device 20 carries out deoxygenation processing to condensed water, the condensed water after deoxygenation
Boiler 40 is sent by feed pump 30.
Referring to Fig. 1 and Fig. 2, a kind of Sealing Water for Feedwater Pump system further includes drain tank 60, drainage pump 61.Each condensate pump
11 water outlet also picks out the sub- pipe 13 of a sealing condensed water, and every sealing is equipped with a valve with the sub- pipe 13 of condensed water.Often
The sub- pipe 13 of root sealing condensed water is incorporated into a sealing condensed water main pipe 14, is also set in the sealing in condensed water main pipe 14
There is a valve.Sealing condensed water main pipe 14 is linked into Sealing Water for Feedwater Pump pipe 15, also sets on the Sealing Water for Feedwater Pump pipe 15
There is a valve.Condensed water is drained to the sealing element 31 of feed pump 30 by Sealing Water for Feedwater Pump pipe 15.From the sealing element of feed pump 30
The condensed waters of 31 outflows flow to drain tank 60, and drain tank 60 hydrophobic is sent what is be collected by drainage pump 61 to oxygen-eliminating device 20.
Further, referring to Fig. 1 and Fig. 2, it is hydrophobic to recycle that drain tank 60 is also used to be connected to steam drainage pipeline 62.
Referring to Fig. 1 and Fig. 2, the water outlet of desalination water pump 51 picks out an elimination salt water main pipe 52, and demineralized water main pipe 52 will be removed
Salt water leads to oxygen-eliminating device 20 and coagulator 10.In addition, picking out the sub- pipe 53 of a demineralized water, demineralized water in demineralized water main pipe 52
Sub- pipe 53 is linked into Sealing Water for Feedwater Pump pipe 15.Also, a valve also is provided on the sub- pipe 53 of demineralized water.
The course of work: when normal work, firstly, opening valve, sealing condensed water of the sealing on the sub- pipe 13 of condensed water
The valve of valve, Sealing Water for Feedwater Pump pipe 15 in main pipe 14.Then, condensed water flows to the sealing of feed pump 30 from coagulator 10
The cavity of part 31.Then, condensed water is flowed out from sealing element 31, and drain tank 60 recycles the condensed water.Finally, condensed water is mixed with hydrophobic
It closes, is squeezed into oxygen-eliminating device 20 after mixing by drainage pump 61.When coagulator 10 overhauls, firstly, closing sealing condensed water
The valve on valve, sealing condensed water main pipe 14 on pipe 13, opens valve, the Sealing Water for Feedwater Pump pipe of the sub- pipe 53 of demineralized water
15 valve.Then, demineralized water flows to the cavity of the sealing element 31 of feed pump 30 from sweet-water tank 50.Then, demineralized water is from close
Sealing 31 flows out, and drain tank 60 recycles the demineralized water.Finally, demineralized water is mixed with hydrophobic, squeezed into after mixing by drainage pump 61
In oxygen-eliminating device 20.
Compared with the existing technology, Sealing Water for Feedwater Pump system described in the utility model realizes feed pump at lower cost
The sealing of mechanical sealing member, and cooling effect preferably, be less likely to be damaged boiler, deaerator level adjustment it is more convenient.In addition,
In the case where realizing the hydrophobic heat of high efficiente callback, moreover it is possible to be effectively prevented from oxygen-eliminating device and generate spontaneous boiling phenomenon.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.
Claims (7)
1. a kind of Sealing Water for Feedwater Pump system, coagulator (10), condensate pump (11), deoxygenation including passing sequentially through pipeline connection
Device (20), feed pump (30) and the sealing element (31) being mounted on feed pump (30), it is characterised in that: further include drain tank
(60), drainage pump (61), the condensate pump (11) are also connected to the water inlet of sealing element (31), and the sealing element (31) goes out
The mouth of a river is connected to the water inlet of drain tank (60), and the drain tank (60) is connected to by drainage pump (61) with oxygen-eliminating device (20).
2. Sealing Water for Feedwater Pump system according to claim 1, it is characterised in that: the drain tank (60) is also used to be connected to
Steam drainage pipeline (62).
3. Sealing Water for Feedwater Pump system according to claim 1, it is characterised in that: further include sweet-water tank (50), desalination
Water pump (51), the sweet-water tank (50) are connected to by desalination water pump (51) with the water inlet of sealing element (31).
4. Sealing Water for Feedwater Pump system according to claim 3, it is characterised in that: the sweet-water tank (50) is also by removing
Brine pump (51) is connected to the water inlet of oxygen-eliminating device (20).
5. Sealing Water for Feedwater Pump system according to claim 4, it is characterised in that: the sweet-water tank (50) is again by removing
Brine pump (51) is connected to the water inlet of coagulator (10).
6. according to the described in any item Sealing Water for Feedwater Pump systems of claim 3 to 5, it is characterised in that: further include sealing with solidifying
It bears water main pipe (14), and using the coagulator (10), the condensate pump (11) of at least two groups, every group of the condensation
Device (10) is connected to sealing condensed water main pipe (14) by condensate pump (11), and the sealing is connect with condensed water main pipe (14)
Enter the water inlet of sealing element (31).
7. Sealing Water for Feedwater Pump system according to claim 6, it is characterised in that: again include Sealing Water for Feedwater Pump pipe
(15), the sweet-water tank (50) pass sequentially through desalination water pump (51), Sealing Water for Feedwater Pump pipe (15) and sealing element (31) into
The mouth of a river connection, it is described sealing with condensed water main pipe (14) by feed pump (30) seal water pipe (15) access sealing element (31) into
The mouth of a river.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821691404.XU CN209084739U (en) | 2018-10-18 | 2018-10-18 | Sealing Water for Feedwater Pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821691404.XU CN209084739U (en) | 2018-10-18 | 2018-10-18 | Sealing Water for Feedwater Pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209084739U true CN209084739U (en) | 2019-07-09 |
Family
ID=67119682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821691404.XU Active CN209084739U (en) | 2018-10-18 | 2018-10-18 | Sealing Water for Feedwater Pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209084739U (en) |
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2018
- 2018-10-18 CN CN201821691404.XU patent/CN209084739U/en active Active
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