CN207065546U - Station boiler feedwater pump machine water shutoff frock - Google Patents
Station boiler feedwater pump machine water shutoff frock Download PDFInfo
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- CN207065546U CN207065546U CN201720804970.6U CN201720804970U CN207065546U CN 207065546 U CN207065546 U CN 207065546U CN 201720804970 U CN201720804970 U CN 201720804970U CN 207065546 U CN207065546 U CN 207065546U
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- heat exchanger
- feed pump
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Abstract
It the utility model is related to a kind of station boiler feedwater pump machine water shutoff frock.Water source after the deoxygenation of the utility model local use is as mechanical seal of feed pump cooling water, and utilize pump discharge pressure itself, deaerated water is depressurized and cooled by the pressure-reducing valve of cooler, heat exchanger, introduce the cooling-water duct of the terminal seal apparatus of feed pump two, as the cooling flushing water of mechanical seal, the technical problem of dissolved oxygen is introduced back into due to picking water shutoff outside so as to solve.Regulating valve is provided with the water side of cooler to the connecting line between the entrance point of cooling-water duct, for adjusting cooling water flow.Cooler preferably uses coil heat exchanger, coil heat exchanger is a kind of dividing wall type heat exchanger, this heat exchanger is that metal tube is turned around into the various shapes being adapted with container, and it is immersed in the liquid in container, the advantages of coil heat exchanger is simple in construction, high pressure can be born, can be manufactured with resistant material.
Description
Technical field
It the utility model is related to a kind of station boiler feedwater pump machine water shutoff frock.
Background technology
The effect of station boiler feed pump is will to be delivered to pot after the boiler feedwater boosting after thermal deaerator deoxygenation
Stove drum, to the continuous moisturizing of boiler, steam water-level is maintained, ensures safe operation of the boiler.Feed pump operating condition is characterized in：Work
Pressure high (being realized by multi-stage impeller, high rotating speed), temperature high (temperature is the saturation temperature under oxygen-eliminating device operating pressure), easy vapour
Change, important auxiliary equipment of the feed pump as boiler, once blowing out accident will be caused by breaking down, so being typically arranged with standby
Pump.
During boiler feedwater handling process, deoxygenation is a very the key link.Oxygen is water supply system and boiler main
Want corrosive substance, should be removed rapidly to water oxygen, otherwise it can corrode the feed water system of boiler and part (economizer and
Header, water screen tube and header etc.), corrosion product iron oxide can enter in pot, in deposition or attachment boiler tube wall and heating surface,
The iron dirt for forming indissoluble and conducting heat bad, causes local overheating to damage heat exchanger tube；Corrosion can also cause inner-walls of duct appearance point to cheat,
Resistance coefficient increases.When corrosive pipeline is serious, it may occur that pipeline burst accident.National regulation evaporation capacity is more than or equal to 2 tons per small
When steam boiler and water temperature be more than or equal to all required deoxygenation of 95 DEG C of hot-water boilers.
Feed pump is because operating pressure and temperature are high, and working speed is high, to ensure tight reliable sealing, frequently with dynamic
The mechanically-sealing apparatus of static-ring structure, the dynamic and static ring of mechanically-sealing apparatus is using materials such as wear-resisting, good heat conductivity carborundum
Matter, to prevent machine from sealing the damage of part overtemperature, the washing water of certain pressure need to be passed through, in factory site application, is accessed
The cooling water of industrial colling or high-quality demineralized water as mechanical seal, its work water temperature are usually between 5~30 DEG C, are realized
Preferable cooling effect.But industrial colling or demineralized water due to access is handled without deoxygenation, this strand of water is into by oxygen
The carrier brought into, the boiler feedwater for causing deoxygenation qualified are mixed into dissolved oxygen again.
Such as the Medium pressure cycle fluidized-bed combustion boiler used in certain factory is to being≤15 micrograms per litres to the requirement of water-soluble oxygen index
(ppb), during operation debugging, it is qualified (≤15 micrograms per litre) to go out water-soluble oxygen using hand-held dissolved oxygen meter detection oxygen-eliminating device, but detect
The water sample of boiler feed pipe, dissolved oxygen reach 0.5mg/L (i.e. 500 μ g/L), remote hypervisor index prescribed limit.Hair through the application
After person of good sense's analysis and research, it is determined as that the dissolved oxygen amount that feed pump machine sealing flushing water is brought into causes boiler feedwater Excessive Dissolved Oxygen, through in short-term
Between close machine water shutoff checking, it is thus identified that the correctness of analysis.
Utility model content
Technical problem to be solved in the utility model is：A kind of station boiler feedwater pump machine water shutoff frock is provided, solved
Water shutoff is picked due to outer and the problem of be introduced back into dissolved oxygen.
Technical scheme is used by solve above-mentioned technical problem the utility model：Station boiler feedwater pump machine water shutoff work
Dress, including the feed pump of thermal deaerator water side is connected to, the mechanically-sealing apparatus of feed pump is equipped with cooling-water duct, gives
Intake pipe is connected with the outlet pipe of water pump, the water side connection cooler of intake pipe, the water side of cooler is connected to cooling
The entrance point of aquaporin, the intake chamber of the port of export connection feed pump of cooling-water duct.
It is further：The port of export of the cooling-water duct of the mechanically-sealing apparatus of feed pump high-pressure side is balanced by water pump
Pipe connects the intake chamber of feed pump；The port of export of the cooling-water duct of the mechanically-sealing apparatus of feed pump low-pressure end directly with feedwater
The intake chamber of pump is connected.
It is further：Tune is provided with the water side of cooler to the connecting line between the entrance point of cooling-water duct
Save valve.
It is further：Cooler is equipped with coil heat exchanger.
The beneficial effects of the utility model are：Water source after local use deoxygenation cools down as mechanical seal of feed pump
Water, and pump discharge pressure itself is utilized, deaerated water is depressurized and cooled by the pressure-reducing valve of cooler, heat exchanger, introduces feedwater
The cooling-water duct of the terminal seal apparatus of pump two, as the cooling flushing water of mechanical seal, so as to solve due to the outer water shutoff that picks
And it is introduced back into the technical problem of dissolved oxygen.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Marked in figure：1- feed pumps, 2- cooling-water ducts, 3- intake pipes, 4- coolers, 5- water pumps balance pipe, 6- regulations
Valve.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model includes the feed pump 1 for being connected to thermal deaerator water side, the machinery of feed pump 1
Sealing device is equipped with cooling-water duct 2, and intake pipe 3, the water side connection of intake pipe 3 are connected with the outlet pipe of feed pump 1
Cooler 4, the water side of cooler 4 are connected to the entrance point of cooling-water duct 2, the port of export connection feedwater of cooling-water duct 2
The intake chamber of pump 1.Preferably, the port of export of the cooling-water duct 2 of the mechanically-sealing apparatus of the high-pressure side of feed pump 1 is put down by water pump
The pipe 5 that weighs connects the intake chamber of feed pump 1；The port of export of the cooling-water duct 2 of the mechanically-sealing apparatus of the low-pressure end of feed pump 1 is direct
It is connected with the intake chamber of feed pump 1.
For convenience of regulation cooling water flow, the water side of cooler 4 to the connecting tube between the entrance point of cooling-water duct 2
Regulating valve 6 is provided with road.
Cooler 4 preferably uses coil heat exchanger.Coil heat exchanger is a kind of dividing wall type heat exchanger, this heat exchanger
It is that metal tube is turned around into the various shapes being adapted with container, and is immersed in the excellent of coil heat exchangers in the liquid in container
Point is simple in construction, can bear high pressure, can be manufactured with resistant material.
Claims (4)
- The pump machine water shutoff frock 1. station boiler feeds water, including it is connected to the feed pump (1) of thermal deaerator water side, feed pump (1) mechanically-sealing apparatus is equipped with cooling-water duct (2), it is characterised in that：Water intaking is connected with the outlet pipe of feed pump (1) Manage (3), the water side connection cooler (4) of intake pipe (3), the water side of cooler (4) is connected to entering for cooling-water duct (2) Mouth end, the intake chamber of the port of export connection feed pump (1) of cooling-water duct (2).
- The pump machine water shutoff frock 2. station boiler as claimed in claim 1 feeds water, it is characterised in that：Feed pump (1) high-pressure side The port of export of the cooling-water duct (2) of mechanically-sealing apparatus connects the intake chamber of feed pump (1) by water pump balance pipe (5)；Give Intake chamber of the port of export of the cooling-water duct (2) of the mechanically-sealing apparatus of water pump (1) low-pressure end directly with feed pump (1) is connected It is logical.
- The pump machine water shutoff frock 3. station boiler as claimed in claim 1 feeds water, it is characterised in that：The water side of cooler (4) Regulating valve (6) is provided with to the connecting line between the entrance point of cooling-water duct (2).
- 4. the station boiler feedwater pump machine water shutoff frock as described in any one in claims 1 to 3, it is characterised in that：Cooling Device (4) is equipped with coil heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804970.6U CN207065546U (en) | 2017-07-04 | 2017-07-04 | Station boiler feedwater pump machine water shutoff frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804970.6U CN207065546U (en) | 2017-07-04 | 2017-07-04 | Station boiler feedwater pump machine water shutoff frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207065546U true CN207065546U (en) | 2018-03-02 |
Family
ID=61508021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720804970.6U Active CN207065546U (en) | 2017-07-04 | 2017-07-04 | Station boiler feedwater pump machine water shutoff frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207065546U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502983A (en) * | 2020-04-24 | 2020-08-07 | 安徽晋煤中能化工股份有限公司 | Self-sealing water device for pump |
-
2017
- 2017-07-04 CN CN201720804970.6U patent/CN207065546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502983A (en) * | 2020-04-24 | 2020-08-07 | 安徽晋煤中能化工股份有限公司 | Self-sealing water device for pump |
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