CN102900662A - Water-feeding pump seal water return water recovery device - Google Patents
Water-feeding pump seal water return water recovery device Download PDFInfo
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- CN102900662A CN102900662A CN2012104276628A CN201210427662A CN102900662A CN 102900662 A CN102900662 A CN 102900662A CN 2012104276628 A CN2012104276628 A CN 2012104276628A CN 201210427662 A CN201210427662 A CN 201210427662A CN 102900662 A CN102900662 A CN 102900662A
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Abstract
The invention provides a water-feeding pump seal water return water recovery device, belongs to the technical field of water-feeding pump seal water return water recovery devices of heat power plants and aims to solve the technical problem of water ejection of water-feeding pump seal water or air leakage of a steam discharge device. The water-feeding pump seal water return water recovery device comprises a water-feeding pump seal water return water pipe, a water storage tank and a steam discharge device and is characterized in that the water storage tank is connected with the water-feeding pump seal water return water pipe through a pipeline and is positioned below water-feeding pumps; and a float ball type water level control valve is arranged in the water storage tank. The water level control valve controls the quantity of water which flows into the steam discharge device according to the water level in the water storage tank, so that the water level in the water storage tank is kept at a safe water level, and the phenomena of the water ejection and the air leakage are effectively avoided.
Description
Technical field
The invention belongs to Power Plant Feedwater pump seal water backwater recovering device technical field, be specifically related to Sealing Water for Feedwater Pump backwater recovering device.
Background technique
Power plant adopts the feed water pump group of helix structure shaft end seal, and its sealing water backwater is without the pressure natural drainage, and draining must be unimpeded.As being obstructed because certain reason causes draining, then can cause Sealing Water for Feedwater Pump backwater chamber full water, thereby cause intaking in the feed water pump oil, affect the feed water pump safe operation.The basic demand that guarantees the normal operation of Sealing Water for Feedwater Pump system therefore the draining of feed water pump backwater is unimpeded.Sealing Water for Feedwater Pump backwater water quality, water temperature satisfy steam exhaust device moisturizing requirement, are used therefore it can be imported steam exhaust device.But be negative pressure in the steam exhaust device under the running state, the Sealing Water for Feedwater Pump water return pipeline is directly linked to each other with steam exhaust device and can cause blank together with the air intake steam exhaust device sealing water backwater.Former design multilevel water seal is serially connected in the Sealing Water for Feedwater Pump backwater to the pipeline of steam exhaust device for this reason, prevents that steam exhaust device is blank.
But in actual motion; because the exhaust steam pressure of air-cooled unit excursion can reach 30kPa; theory analysis and practical operation situation show; three grades of water seals are difficult to adapt to the excursion of exhaust steam pressure; Sealing Water for Feedwater Pump often occurring emits water or steam exhaust device blank; had a strong impact on unit safety operation, the Sealing Water for Feedwater Pump backwater can't normally be reclaimed, made unit make-up water percentage severe overweight.
Summary of the invention
The objective of the invention is for solving deficiency of the prior art, a kind of strong adaptability, stable high Sealing Water for Feedwater Pump backwater recovering device are provided.
This invention is to solve the problems of the technologies described above the technological scheme of taking to be:
Sealing Water for Feedwater Pump backwater recovering device comprises Sealing Water for Feedwater Pump return pipe, water storage box, steam exhaust device; It is characterized in that: described water storage box is positioned at the below of feed water pump; Described Sealing Water for Feedwater Pump return pipe is communicated with the water storage box water intake, and water intake is positioned at water storage box one side middle and lower part; In middle position, water storage box bottom the float-ball type altitude valve is set; Be provided with manger board in the water storage box, this manger board is fixed in water intake one side below the water storage box cover plate, and parallel with the water storage box tank wall at water intake place, and its lower end is lower than water intake and with gapped at the bottom of the water storage box case; The float-ball type altitude valve is communicated with the outlet pipe of water storage box, and this outlet pipe is communicated with steam exhaust device; Water storage box has the maintenance discharging valve, and water storage box is provided with spill pipe.
The characteristics of described float-ball type altitude valve are: comprise the valve seat in ball float, connecting rod, valve pocket, the valve pocket; Be connected with certain free gap between described connecting rod and the ball float, namely allow ball float that suitable lateral displacement is arranged; Described valve pocket top is provided with spacing plug, leaves certain matching gap between valve pocket and the valve seat, is provided with some circles water inlet along circumference on the tube wall of valve seat bottom, and the valve seat lower end is connected with outlet pipe.
The present invention compared with prior art has following beneficial effect:
The present invention adopts water storage box and altitude valve to have following beneficial effect:
1), good adaptability is arranged: the Sealing Water for Feedwater Pump backwater that can satisfy simultaneously under the various operating conditionss of one or more feed water pump of same unit reclaims requirement, can realize fully comprising start and stop without the operation operation;
2), have fabulous working stability: the vacuum in condenser device is without the bite phenomenon;
3), can realize the zero-emission trench of sealing water;
4) long working life, repair and maintenance is easy.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is altitude valve structural representation of the present invention.
Among the figure: 1-feed water pump; 2-sealing water backwater row ground-based duct; 3-Sealing Water for Feedwater Pump return pipe; 4-manger board; 5-water intake; 6-discharging valve; 7-float-ball type altitude valve; 8-outlet pipe; 9-steam exhaust device; 10-spill pipe; 11-ball float; 12-connecting rod; 13-valve seat; 14-valve pocket; 15-water inlet; 16-spacing plug.
Embodiment
As shown in Figure 1, Sealing Water for Feedwater Pump backwater recovering device comprises Sealing Water for Feedwater Pump return pipe 3, water storage box, steam exhaust device 8; Be characterized in: described water storage box is positioned at the below of feed water pump 1; Described Sealing Water for Feedwater Pump return pipe 3 is communicated with water storage box water intake 5, and water intake 5 is positioned at water storage box one side middle and lower part; In middle position, water storage box bottom float-ball type altitude valve 7 is set; Be provided with manger board 4 in the water storage box, this manger board is fixed in water intake one side below the water storage box cover plate, and parallel with the water storage box tank wall at water intake 5 places, and its lower end is lower than water intake 5 and with gapped at the bottom of the water storage box case; Float-ball type altitude valve 7 is communicated with the outlet pipe 8 of water storage box, and this outlet pipe is communicated with steam exhaust device 9; Water storage box has maintenance discharging valve 6, and water storage box is provided with spill pipe 10;
As shown in Figure 2, described float-ball type altitude valve 7 comprises the valve seat 13 in ball float 11, connecting rod 12, valve pocket 14, the valve pocket; Be connected with certain free gap between described connecting rod 12 and the ball float 11, namely allow ball float that suitable lateral displacement is arranged; Described valve pocket top is provided with spacing plug 16, leaves certain matching gap between valve pocket 14 and the valve seat 13, is provided with some circles water inlet 15 along circumference on the tube wall of valve seat bottom, and the valve seat lower end is connected with outlet pipe 8.
Using method and working principle:
During this invention work, sealing water in the feed water pump backwater chamber enters in the water storage box in stress-free situation naturally, after water level arrives the working water bit line, altitude valve is progressively opened, be inhaled in the steam exhaust device 9 through outlet pipe 8 under the suction function of water in the water storage box in steam exhaust device 9, when water level is low altitude valve close fully or aperture less, when water level is higher, ball float increases, the aperture of altitude valve progressively strengthens, after water level arrived the overflow water bit line, the water in the water storage box flowed out by spill pipe 10; When water storage box is stopped using maintenance, close the feed water pump back-water valve (BWV), and the valve on the opening encapsulation water backwater row ground-based duct 2, open maintenance discharging valve 6 and bleed off Yu Shui.
Claims (2)
1. Sealing Water for Feedwater Pump backwater recovering device comprises Sealing Water for Feedwater Pump return pipe (3), water storage box, steam exhaust device (8); It is characterized in that: described water storage box is positioned at the below of feed water pump (1); Described Sealing Water for Feedwater Pump return pipe (3) is communicated with water storage box water intake (5), and water intake (5) is positioned at water storage box one side middle and lower part; In middle position, water storage box bottom float-ball type altitude valve (7) is set; Be provided with manger board (4) in the water storage box, this manger board is fixed in water intake one side below the water storage box cover plate, and parallel with the water storage box tank wall at water intake (5) place, and its lower end is lower than water intake (5) and with gapped at the bottom of the water storage box case; Float-ball type altitude valve (7) is communicated with the outlet pipe (8) of water storage box, and this outlet pipe is communicated with steam exhaust device (9); Water storage box has maintenance discharging valve (6), and water storage box is provided with spill pipe (10).
2. according to Sealing Water for Feedwater Pump backwater recovering device claimed in claim 1, it is characterized in that: described float-ball type altitude valve (7) comprises the valve seat (13) in ball float (11), connecting rod (12), valve pocket (14), the valve pocket; Be connected with certain free gap between described connecting rod (12) and the ball float (11), namely allow ball float that suitable lateral displacement is arranged; Described valve pocket top is provided with spacing plug (16), leaves certain matching gap between valve pocket (14) and the valve seat (13), is provided with some circles water inlet (15) along circumference on the tube wall of valve seat bottom, and the valve seat lower end is connected with outlet pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104276628A CN102900662A (en) | 2012-10-31 | 2012-10-31 | Water-feeding pump seal water return water recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104276628A CN102900662A (en) | 2012-10-31 | 2012-10-31 | Water-feeding pump seal water return water recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102900662A true CN102900662A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104276628A Pending CN102900662A (en) | 2012-10-31 | 2012-10-31 | Water-feeding pump seal water return water recovery device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102900662A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257564A (en) * | 1993-03-03 | 1994-09-13 | Toshiba Corp | High-pressure drain pump shaft sealing facility |
| JPH07128487A (en) * | 1993-10-29 | 1995-05-19 | Toshiba Corp | Shaft sealing water recovery device for draining pump of supply water heater |
| JP2008180159A (en) * | 2007-01-25 | 2008-08-07 | Chugoku Electric Power Co Inc:The | Sealing water recovery facility and sealing water recovery method |
| CN101571141A (en) * | 2009-06-10 | 2009-11-04 | 中国电力工程顾问集团西南电力设计院 | Sealed water recovery system of feed pump |
| CN202954958U (en) * | 2012-10-31 | 2013-05-29 | 忻州广宇煤电有限公司 | Recovering device for return sealing water of water feeding pumps |
-
2012
- 2012-10-31 CN CN2012104276628A patent/CN102900662A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257564A (en) * | 1993-03-03 | 1994-09-13 | Toshiba Corp | High-pressure drain pump shaft sealing facility |
| JPH07128487A (en) * | 1993-10-29 | 1995-05-19 | Toshiba Corp | Shaft sealing water recovery device for draining pump of supply water heater |
| JP2008180159A (en) * | 2007-01-25 | 2008-08-07 | Chugoku Electric Power Co Inc:The | Sealing water recovery facility and sealing water recovery method |
| CN101571141A (en) * | 2009-06-10 | 2009-11-04 | 中国电力工程顾问集团西南电力设计院 | Sealed water recovery system of feed pump |
| CN202954958U (en) * | 2012-10-31 | 2013-05-29 | 忻州广宇煤电有限公司 | Recovering device for return sealing water of water feeding pumps |
Non-Patent Citations (3)
| Title |
|---|
| 施缤: "给水泵密封水回收装置的研制和应用", 《华北电力技术》 * |
| 梅文涛: "旺隆热电厂给水泵密封水回水***改造", 《科技传播》 * |
| 雷耀武等: "锅炉电动给水泵密封水回收***改造", 《西北电力技术》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130130 |