CN203259028U - Double-backpressure-condenser vacuum pumping system - Google Patents
Double-backpressure-condenser vacuum pumping system Download PDFInfo
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- CN203259028U CN203259028U CN 201320210639 CN201320210639U CN203259028U CN 203259028 U CN203259028 U CN 203259028U CN 201320210639 CN201320210639 CN 201320210639 CN 201320210639 U CN201320210639 U CN 201320210639U CN 203259028 U CN203259028 U CN 203259028U
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- vavuum pump
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- 238000005086 pumping Methods 0.000 title abstract 5
- 230000000740 bleeding effect Effects 0.000 claims description 33
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000010977 unit operation Methods 0.000 description 4
- 230000009191 jumping Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model relates to a double-backpressure-condenser vacuum pumping system which comprises a high backpressure condenser, a low backpressure condenser and vacuum pumps. Exhaust tubes with valves are respectively led by an inner ring and an outer ring of the high backpressure condenser. The two exhaust tubes are connected with an air suction port of the first vacuum pump after being joined. Exhaust tubes with valves are respectively led by an inner ring and an outer ring of the low backpressure condenser. The two exhaust tubes are connected with an air suction port of the second vacuum pump after being joined. By the adoption of the double-backpressure-condenser vacuum pumping system, the problem that double backpressure can not be formed in an existing double-backpressure-condenser vacuum pumping system because the pressure of the high backpressure condenser is similar to the pressure of the low backpressure condenser is solved, the double backpressure effect of the high backpressure condenser and the low backpressure condenser and the vacuum degree of a unit are obviously improved, operating stability and economy of the unit are greatly improved, and the double-backpressure-condenser vacuum pumping system is ideal matching equipment of a condensing turbo generator unit.
Description
Technical field
The utility model relates to the condensing steam turbine generator group, relates in particular to a kind of double pressure condenser pumped vacuum systems.
Background technology
Four overcritical 600MW condensing steam turbine generator groups that certain power plant's first phase is installed, main frame is CLN600-24.2/566/566 type three cylinders four exhaust turbines that Harbin Turbine is produced, the double pressure condenser that supporting Harbin Turbine is produced, the condenser model is the N-33000-2 type, adopt two back pressures, Double-casing, the single process structure.Condenser Design back pressure: average back pressure 4.9kPa, summer condition back pressure 11.8kPa, low-pressure side back pressure 4.4kPa, high-pressure side back pressure 5.4kPa.Every unit is installed three vavuum pumps.According to design data, the pressure gap between the 600MW unit high and low pressure condenser is generally about 1KP, and its average pressure will be a little less than single back pressure condenser, so two back pressure unit outline aspect performance driving economy is better than single back pressure unit.
The line arrangement of existing double pressure condenser pumped vacuum systems as shown in Figure 1, exhaust tube divides two-way to draw from the inside and outside circle of the high pressure condenser gas area of finding time, behind restricting orifice, enter the low pressure condenser, converge with the inside and outside circle exhaust tube of low pressure condenser respectively, and then draw from the low pressure condenser, and respectively behind an isolating door, be aggregated into female pipe of bleeding, link to each other with three vacuum pump inlets respectively at last.
According to existing double pressure condenser pumped vacuum systems arrangement, the incondensable gas of high-pressure side condenser will be extracted out through low-pressure side.Because two condensers link to each other by vacuumizing communicating pipe, pressure tends to be balanced, and causes the pressure reduction of high and low pressure condenser less, off-design value far away.In the design, in order to improve both sides pressure reduction, limit simultaneously air extraction amount in the high pressure condenser, prevent that high pressure condenser rate of air sucked in required is excessive and squeeze the low pressure condenser and bleed, vacuumize at the high and low pressure condenser restricting orifice (condenser inner) has been installed communicating pipe, and the adjustment door (condenser is outside) that increased in parallel with restricting orifice, to carry out correspondingly fine tuning.
And in actual motion, when parameter reached standard, the high and low pressure condenser vacuum still had larger departing from design load, and the comprehensive adjustment of declarative section discharge orifice board size and adjustment door is existing problems still, needed continuation to test by adjusting valve opening.Although so can realize in theory by the method for adjusting throttle diameter and adjustment door aperture; but must just can obtain only state through the test of many times adjustment if change restricting orifice or adjust valve opening; and each test group that must take this opportunity is shut down and just can be adjusted; so the difficulty in the actual middle realization that puts into operation of unit is very large, greatly affected economy and the stability of unit operation.
The utility model content
The purpose of this utility model provides a kind of double pressure condenser pumped vacuum systems, can't form the problem of the two back pressures of design because the high and low pressure condenser pressure is close to solve existing double pressure condenser pumped vacuum systems, two back pressure effects and the unit vacuum of high and low pressure condenser are significantly improved, thereby greatly improve stability and the economy of unit operation.
Double pressure condenser pumped vacuum systems of the present utility model, comprise high pressure condenser, low pressure condenser, vavuum pump, the inside and outside circle of described high pressure condenser is respectively drawn one and is with valvular exhaust tube, after converging, this two exhaust tube is connected with the air entry of the first vavuum pump, the inside and outside circle of described low pressure condenser is respectively drawn one and is with valvular exhaust tube, is connected with the air entry of the second vavuum pump after this two exhaust tube converges.
Preferably, on the exhaust tube that the inside and outside circle of described high pressure condenser is drawn with valve be vacuum gate valve, on the exhaust tube that the inside and outside circle of described low pressure condenser is drawn with valve be vacuum gate valve.
Preferably, the inner ring of described high pressure condenser is connected by the inner ring tube connector with the inner ring of low pressure condenser, be serially connected with restricting orifice on this inner ring tube connector and adjust door, the outer ring of described high pressure condenser is connected by the outer ring tube connector with the outer ring of low pressure condenser, is serially connected with restricting orifice on this outer ring tube connector and adjusts door.
Preferably, in the described high pressure condenser, after converging, the exhaust tube that draw the outer ring is connected in female pipe of bleeding, and be connected with the air entry of the first vavuum pump by this female pipe of bleeding, in the described low pressure condenser, after converging, the exhaust tube that draw the outer ring also is connected in same female pipe of bleeding, and be connected with the air entry of the second vavuum pump by this female pipe of bleeding, the air entry of the 3rd vavuum pump is connected with female pipe of bleeding of being connected between vavuum pump with described the first vavuum pump, and between the 3rd vavuum pump and the first vavuum pump, be provided with valve on female pipe of bleeding between the 3rd vavuum pump and the second vavuum pump.
Preferably, between described the 3rd vavuum pump and the first vavuum pump, the upper valve that arranges of female pipe of bleeding between the 3rd vavuum pump and the second vavuum pump is motor-driven valve.
The utility model is by arranging the exhaust tube of high and low pressure condenser separately, be that the high and low pressure condenser adopts the mode of bleeding separately, thereby effectively having eliminated the shared mother that bleeds manages and interactional phenomenon, so that incoagulable gas can obtain more fully pump drainage in the high pressure condenser, and then improved two back pressure effects of double pressure condenser, greatly improved the economy of unit operation;
Further, in the high pressure condenser, after converging, the exhaust tube that draw the outer ring is connected in female pipe of bleeding, and be connected with the air entry of the first vavuum pump by this female pipe of bleeding, in the low pressure condenser, after converging, the exhaust tube that draw the outer ring also is connected in same female pipe of bleeding, and be connected with the air entry of the second vavuum pump by this female pipe of bleeding, the air entry of the 3rd vavuum pump is connected with female pipe of bleeding of being connected between vavuum pump with the first vavuum pump, and between the 3rd vavuum pump and the first vavuum pump, be provided with valve on female pipe of bleeding between the 3rd vavuum pump and the second vavuum pump, the 3rd vavuum pump is made stand-by pump, when the first vavuum pump or the second vavuum pump jumping pump, joined the 3rd vavuum pump, joined simultaneously the contact valve on corresponding female pipe of bleeding, when the first vavuum pump or the second vacuum pump inlet pressure are lower than required value, joined the 3rd vavuum pump, join simultaneously the contact valve on corresponding female pipe of bleeding, thereby provide reliable assurance for the safe and stable operation of unit;
Further, when with two on the adjustment door in the utility model and the female pipe of bleeding contact valve openings, the utility model can also the method for operation basic the same with existing double pressure condenser pumped vacuum systems move, and therefore, the method for operation of the present utility model is relatively flexible.
Description of drawings
Fig. 1 is the structural representation of existing double pressure condenser pumped vacuum systems;
Fig. 2 is the structural representation of double pressure condenser pumped vacuum systems of the present utility model.
Among the figure:
1. high pressure condenser; 2. low pressure condenser; 3. vacuumize communicating pipe; 4. restricting orifice; 5. adjust door; 6. air compressor machine; 7. closure plate; 8. exhaust tube; 9. the mother that bleeds manages; 10. motor-driven valve; 11. the first vavuum pump; 12. the 3rd vavuum pump; 13. the second vavuum pump; 101,201. inner rings; 102,202. outer rings.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
Such as Fig. 1～shown in Figure 2, the double pressure condenser pumped vacuum systems of present embodiment comprises high pressure condenser 1, low pressure condenser 2, vavuum pump, the inside and outside circle of high pressure condenser 1 is respectively drawn one and is with valvular exhaust tube 8, after converging, this two exhaust tube is connected with the air entry of the first vavuum pump 11, the inside and outside circle of low pressure condenser 2 is respectively drawn one and is with valvular exhaust tube 8, is connected with the air entry of the second vavuum pump 13 after this two exhaust tube converges.
As preferably, on the exhaust tube that the inside and outside circle of high pressure condenser 1 is drawn with valve be vacuum gate valve, on the exhaust tube that the inside and outside circle of low pressure condenser is drawn with valve be vacuum gate valve.
As preferably, original restricting orifice 4 in condenser pipeline inside is moved on to the outside, be connected in series with the adjustment door 5 of former parallel connection, to add closure plate 7 isolated with taking pipeline behind the restricting orifice 4 away, the inner ring 101 that is high pressure condenser 1 is connected by the inner ring tube connector with the inner ring 201 of low pressure condenser 2, serial connection restricting orifice 4 and adjustment door 5 on this inner ring tube connector, the outer ring 102 of high pressure condenser 1 is connected by the outer ring tube connector with the outer ring 202 of low pressure condenser 2, serial connection restricting orifice 4 and adjustment door 5 on this outer ring tube connector.
As preferably, in the high pressure condenser 1, after converging, the exhaust tube that draw the outer ring is connected in female pipe 9 of bleeding, and be connected with the air entry of the first vavuum pump 11 by this female pipe 9 of bleeding, in the low pressure condenser 2, after converging, the exhaust tube that draw the outer ring also is connected in female pipe 9 of bleeding, and be connected with the air entry of the second vavuum pump 13 by this female pipe 9 of bleeding, the air entry of the 3rd vavuum pump 12 and the first vavuum pump 11 be connected between vavuum pump female pipe of bleeding of 13 and be connected, and 11 in the 3rd vavuum pump 12 and the first vavuum pump, be provided with valve on female pipe 9 of bleeding that the 3rd vavuum pump 12 and the second vavuum pump are 13.
As preferably, the valve that arranges on female pipe 9 of bleeding that 11 in the 3rd vavuum pump 12 and the first vavuum pump, the 3rd vavuum pump 12 and the second vavuum pump are 13 is motor-driven valve 10.
The course of work of the present utility model is as follows: when normally moving, close two contact valves on female pipe of bleeding, the high pressure condenser is bled by the first vavuum pump, the low pressure condenser is bled by the second vavuum pump, the 3rd vavuum pump is as the shared stand-by pump of the first vavuum pump and the second vavuum pump, and namely the high and low pressure condenser is bled respectively; When the first vavuum pump or the second vavuum pump jumping pump, joined the 3rd vavuum pump, joined simultaneously corresponding contact valve; When the first vavuum pump or the second vacuum pump inlet pressure are lower than required value, joined the 3rd vavuum pump, join simultaneously corresponding communicating door, thereby provide reliable assurance for the safe and stable operation of unit.
If open two contact valves and adjust door, the method for operation is basic the same with existing double pressure condenser pumped vacuum systems, and three vavuum pumps can be for subsequent use each other.
The utility model has solved existing double pressure condenser pumped vacuum systems can't form the two back pressures of design because the high and low pressure condenser pressure is close problem, two back pressure effects and the unit vacuum of high and low pressure condenser are significantly improved, thereby have greatly improved stability and the economy of unit operation.
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (5)
1. double pressure condenser pumped vacuum systems, it is characterized in that: comprise high pressure condenser, low pressure condenser, vavuum pump, the inside and outside circle of described high pressure condenser is respectively drawn one and is with valvular exhaust tube, after converging, this two exhaust tube is connected with the air entry of the first vavuum pump, the inside and outside circle of described low pressure condenser is respectively drawn one and is with valvular exhaust tube, is connected with the air entry of the second vavuum pump after this two exhaust tube converges.
2. double pressure condenser pumped vacuum systems according to claim 1, it is characterized in that: on the exhaust tube that the inside and outside circle of described high pressure condenser is drawn with valve be vacuum gate valve, on the exhaust tube that the inside and outside circle of described low pressure condenser is drawn with valve be vacuum gate valve.
3. double pressure condenser pumped vacuum systems according to claim 1, it is characterized in that: the inner ring of described high pressure condenser is connected by the inner ring tube connector with the inner ring of low pressure condenser, be serially connected with restricting orifice on this inner ring tube connector and adjust door, the outer ring of described high pressure condenser is connected by the outer ring tube connector with the outer ring of low pressure condenser, is serially connected with restricting orifice on this outer ring tube connector and adjusts door.
4. double pressure condenser pumped vacuum systems according to claim 1, it is characterized in that: in the described high pressure condenser, after converging, the exhaust tube that draw the outer ring is connected in female pipe of bleeding, and be connected with the air entry of the first vavuum pump by this female pipe of bleeding, in the described low pressure condenser, after converging, the exhaust tube that draw the outer ring also is connected in same female pipe of bleeding, and be connected with the air entry of the second vavuum pump by this female pipe of bleeding, the air entry of the 3rd vavuum pump is connected with female pipe of bleeding of being connected between vavuum pump with described the first vavuum pump, and between the 3rd vavuum pump and the first vavuum pump, be provided with valve on female pipe of bleeding between the 3rd vavuum pump and the second vavuum pump.
5. double pressure condenser pumped vacuum systems according to claim 4 is characterized in that: the upper valve that arranges of female pipe of bleeding between described the 3rd vavuum pump and the first vavuum pump, between the 3rd vavuum pump and the second vavuum pump is motor-driven valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320210639 CN203259028U (en) | 2013-04-24 | 2013-04-24 | Double-backpressure-condenser vacuum pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320210639 CN203259028U (en) | 2013-04-24 | 2013-04-24 | Double-backpressure-condenser vacuum pumping system |
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| CN203259028U true CN203259028U (en) | 2013-10-30 |
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| CN 201320210639 Expired - Fee Related CN203259028U (en) | 2013-04-24 | 2013-04-24 | Double-backpressure-condenser vacuum pumping system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296554A (en) * | 2014-10-10 | 2015-01-21 | 张邵波 | Steam condensing type power station steam condenser chamber vacuumizing system |
| CN104990427A (en) * | 2015-07-30 | 2015-10-21 | 大唐桂冠合山发电有限公司 | System improving vacuum-pumping efficiency of double-backpressure condenser |
| CN106052414A (en) * | 2016-06-28 | 2016-10-26 | 中广核工程有限公司 | Condenser vacuum-pumping system and method |
| CN110542326A (en) * | 2019-09-25 | 2019-12-06 | 双良节能系统股份有限公司 | A direct air-cooled steam system and its control method for extracting non-condensable gas |
| CN111504081A (en) * | 2020-04-08 | 2020-08-07 | 中国电建集团河北省电力勘测设计研究院有限公司 | Many backpressure condenser vacuum pumping system of turbo generator set |
-
2013
- 2013-04-24 CN CN 201320210639 patent/CN203259028U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296554A (en) * | 2014-10-10 | 2015-01-21 | 张邵波 | Steam condensing type power station steam condenser chamber vacuumizing system |
| CN104990427A (en) * | 2015-07-30 | 2015-10-21 | 大唐桂冠合山发电有限公司 | System improving vacuum-pumping efficiency of double-backpressure condenser |
| CN106052414A (en) * | 2016-06-28 | 2016-10-26 | 中广核工程有限公司 | Condenser vacuum-pumping system and method |
| CN106052414B (en) * | 2016-06-28 | 2018-05-29 | 中广核工程有限公司 | Evacuation system for steam condenser and condenser vacuum pumping method |
| CN110542326A (en) * | 2019-09-25 | 2019-12-06 | 双良节能系统股份有限公司 | A direct air-cooled steam system and its control method for extracting non-condensable gas |
| CN111504081A (en) * | 2020-04-08 | 2020-08-07 | 中国电建集团河北省电力勘测设计研究院有限公司 | Many backpressure condenser vacuum pumping system of turbo generator set |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20170424 |