CN205404055U - System for improve two backpressure condenser vacuum leak detection efficiency - Google Patents
System for improve two backpressure condenser vacuum leak detection efficiency Download PDFInfo
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- CN205404055U CN205404055U CN201620139962.XU CN201620139962U CN205404055U CN 205404055 U CN205404055 U CN 205404055U CN 201620139962 U CN201620139962 U CN 201620139962U CN 205404055 U CN205404055 U CN 205404055U
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- pressure condenser
- vacuum
- vacuum pump
- condenser
- low pressure
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Abstract
The utility model discloses a system for improve two backpressure condenser vacuum leak detection efficiency, the system includes high -pressure condenser and low pressure condenser, the high pressure condenser passes through vacuum pump package A evacuation, the low pressure condenser passes through vacuum pump package C evacuation, during the operation high pressure condenser and low pressure condenser pass through the pipeline and communicate each other install one on the pipeline between high pressure condenser and the low pressure condenser and be used for the third stop valve that opens circuit, increase a set of vacuum pump package B simultaneously, vacuum pump package B is connected, is connected with high -pressure condenser vacuum tube way through the second stop valve through first stop valve and low pressure condenser vacuum tube way respectively. The utility model discloses utilize the characteristics that set up of two backpressure condenser vacuum systems self, need not increase equipment, determine the leak source through the method of operation of controlling the vacuum pump and in two backpressure condensers one side, carry out corresponding to the one side that has the leak source and look for, reduce work load, improve the vacuum greatly and look for efficiency hourglass, practiced thrift the measuring cost.
Description
Technical field
This utility model relates to a kind of system improving double pressure condenser vacuum leakage detection efficiency.
Background technology
Vacuum System Tightness of Steam Turbines is one of principal economic indicators of examination generating set, and it directly affects the economical operation of generating set.Vacuum tightness declines, and can operating unit be adversely affected.At present, large-sized unit is all configuration double pressure condenser.Double; two back pressures refer to that steam turbine has the exhaust casing of two different pressures, and such steam turbine is called double; two back pressure turbine, and corresponding condenser is called double pressure condenser, as shown in Figure 1.
The defective reason of unit vacuum tightness is that incondensable gas leaks into Steam Side of Condenser, and the purpose of vacuum system leakage detection finds the leakage point in vacuum system to block, and then improves the tightness of vacuum.Owing to Steam Turbine vacuum system is comparatively huge, the disguise of leak source is bigger, all negative pressure systems being connected with vacuum system are likely to cause leakage, affect the tightness of unit, the unit of especially high-power, double pressure condenser, its vacuum system is doubled than the complexity of single back pressure unit vacuum system, so the lookup of leak source is also more thorny.The method of current vacuum leakage detection is when finding unit vacuum tightness difference, and the vacuum system of double pressure condenser is investigated one by one, and owing to double pressure condenser vacuum system is extremely complex, the efficiency of vacuum leakage detection is very low.
Summary of the invention
The purpose of this utility model proposes a kind of system improving double pressure condenser vacuum leakage detection efficiency, it is when unit vacuum tightness is defective, propose a kind of for the system improving double pressure condenser vacuum leakage detection efficiency, native system can improve the efficiency of vacuum leakage detection, save the on-the-spot leakage detection time, improve safety and the economy of unit operation.
To achieve these goals, the technical solution of the utility model is:
A kind of system for improving double pressure condenser vacuum leakage detection efficiency, including high pressure condenser and low pressure condenser, described high pressure condenser passes through vacuum pump group A evacuation, described low pressure condenser passes through vacuum pump group C evacuation, during operation, described high pressure condenser and low pressure condenser are interconnected by pipeline, wherein, pipeline between described high pressure condenser and low pressure condenser is installed the 3rd stop valve for open circuit, increase by one group of vacuum pump group B simultaneously, described vacuum pump group B is connected with low pressure condenser vacuum-pumping pipeline respectively through the first stop valve, it is connected with high pressure condenser vacuum-pumping pipeline by the second stop valve.
Scheme is further: one group of vacuum pump group B of described increase, is the appendage vacuum pump group that carries of double pressure condenser.
Scheme is further: described first stop valve, the second stop valve, the 3rd stop valve are Electronic control stop valve.
The beneficial effects of the utility model:
What this utility model utilized double pressure condenser vacuum system self arranges feature, without increasing equipment, judge that leak source is in double pressure condenser side by controlling the method for operation of vacuum pump, the side having leak source is searched targetedly, reduce workload, it is greatly improved vacuum and looks for efficiency leakage, save testing cost.
Below in conjunction with drawings and Examples, invention is described in detail.
Accompanying drawing explanation
Fig. 1 is this utility model system schematic.
Detailed description of the invention
A kind of system for improving double pressure condenser vacuum leakage detection efficiency, as shown in Figure 1: include high pressure condenser and low pressure condenser, described high pressure condenser passes through vacuum pump group A evacuation, described low pressure condenser passes through vacuum pump group C evacuation, during operation, described high pressure condenser and low pressure condenser are interconnected by pipeline, wherein, pipeline between described high pressure condenser and low pressure condenser is installed the 3rd stop valve (valve 3) for detecting open circuit, increase by one group of vacuum pump group B simultaneously, described vacuum pump group B is connected with low pressure condenser vacuum-pumping pipeline respectively through the first stop valve (valve 1), it is connected with high pressure condenser vacuum-pumping pipeline by the second stop valve (valve 2).
In embodiment: power plant operationally, adopts a dual-purpose received shipment row mode: vacuum pump group A, vacuum pump group C run, and respectively low pressure condenser, high pressure condenser are carried out evacuation, and valve 1, valve 2 are closed, and vacuum pump group B is standby.When vacuum tightness is defective, open vacuum pump group B, open valve 1, keep valve 2 to close.Therefore, one group of vacuum pump group B of described increase, is the appendage vacuum pump group that carries of double pressure condenser；Native system takes full advantage of the existing device of power plant, is filled and becomes detection equipment and use.
In embodiment: described first stop valve, the second stop valve, the 3rd stop valve are electronic control
Stop valve processed.
Described system is when high pressure condenser and low pressure condenser normal operation, it is first shut off the 3rd stop valve by mutually isolated to high pressure condenser and low pressure condenser, close the first stop valve and the second stop valve, vacuum pump group A and vacuum pump group C extracting vacuum simultaneously also keeps high pressure condenser and low pressure Condenser Vacuum Pressure stable, then the first stop valve is opened, the second stop valve is kept to close, start vacuum pump group B and vacuum pump group C and extract low pressure condenser vacuum simultaneously, observe low pressure condenser vacuum situation, if now low pressure condenser vacuum improves, illustrate that low pressure condenser has leak source to need maintenance further, if now low pressure condenser vacuum is constant, illustrate that low pressure condenser is without leak source；Then the first stop valve is closed, open the second stop valve, vacuum pump group B and vacuum pump group A extracts high pressure condenser vacuum simultaneously, observe high pressure condenser vacuum situation, if now high pressure condenser vacuum improves, illustrate that high pressure condenser has leak source to need maintenance further, if now high pressure condenser vacuum is constant, illustrate that high pressure condenser is without leak source.
Described system is without increasing vacuum meter, and utilize the steam gauge of work to observe, described observation low pressure condenser vacuum situation or observation high pressure condenser vacuum situation are to observe the change of the existing steam gauge working steam pressure of condenser, when increasing vacuum pump group B and participating in evacuation simultaneously, if working steam pressure declines illustrates that the vacuum of condenser improves, condenser has gas leakage point, if the vacuum of the constant explanation condenser of working steam pressure is not changed in, condenser does not leak gas a little.
In system: one group of vacuum pump group B of described increase, it it is the appendage vacuum pump group that carries of double pressure condenser.
In system: described observation is that personnel on site faces observation directly.
Said system method can be described as:
(1) first passing through valve 3 shown in closedown Fig. 1, isolated double pressure condenser vapour side, become independent heat transfer system, both sides are UNICOM no longer.After valve 3 cuts out, the pressure change inside high and low back pressure condenser would not interfere with each other.
(2) open vacuum pump group B, open valve 1, keep valve 2 to close.Being thus that low pressure condenser is carried out evacuation by vacuum pump group B, vacuum pump group C, vacuum pump group A is to high pressure condenser evacuation.Now check low-pressure side condenser pressure P1Variation tendency；
(3) turning off valve 1, open valve 2, be thus that low pressure condenser is carried out evacuation by vacuum pump group C, vacuum pump group A, vacuum pump group B are to high pressure condenser evacuation.Now check high-pressure side condenser pressure P2Variation tendency；
(4) when completing step (2), if low pressure condenser pressure P1Continue to reduce, illustrate that there is leak source low pressure condenser side；If low pressure condenser pressure P1Constant, illustrate that low pressure condenser side is without leak source；
(5) when completing step (3), if high pressure condenser pressure P2Continue to reduce, illustrate that there is leak source high pressure condenser side；If high pressure condenser pressure P2Constant, illustrate that high pressure condenser side is without leak source.
By above-mentioned 5 steps, it is possible to judge that leak source is at which side condenser, reduces the workload of half, greatly improves the efficiency of vacuum leakage detection work accurately.
Claims (3)
1. the system being used for improving double pressure condenser vacuum leakage detection efficiency, including high pressure condenser and low pressure condenser, described high pressure condenser passes through vacuum pump group A evacuation, described low pressure condenser passes through vacuum pump group C evacuation, during operation, described high pressure condenser and low pressure condenser are interconnected by pipeline, it is characterized in that, pipeline between described high pressure condenser and low pressure condenser is installed the 3rd stop valve for open circuit, increase by one group of vacuum pump group B simultaneously, described vacuum pump group B is connected with low pressure condenser vacuum-pumping pipeline respectively through the first stop valve, it is connected with high pressure condenser vacuum-pumping pipeline by the second stop valve.
2. system according to claim 1, it is characterised in that one group of vacuum pump group B of described increase, is the appendage vacuum pump group that carries of double pressure condenser.
3. system according to claim 1, it is characterised in that described first stop valve, the second stop valve, the 3rd stop valve are Electronic control stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620139962.XU CN205404055U (en) | 2016-02-25 | 2016-02-25 | System for improve two backpressure condenser vacuum leak detection efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620139962.XU CN205404055U (en) | 2016-02-25 | 2016-02-25 | System for improve two backpressure condenser vacuum leak detection efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205404055U true CN205404055U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620139962.XU Expired - Fee Related CN205404055U (en) | 2016-02-25 | 2016-02-25 | System for improve two backpressure condenser vacuum leak detection efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486471A (en) * | 2016-02-25 | 2016-04-13 | 中国大唐集团科学技术研究院有限公司华东分公司 | Method and system for improving vacuum leak finding efficiency of double back-pressure condensers |
-
2016
- 2016-02-25 CN CN201620139962.XU patent/CN205404055U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486471A (en) * | 2016-02-25 | 2016-04-13 | 中国大唐集团科学技术研究院有限公司华东分公司 | Method and system for improving vacuum leak finding efficiency of double back-pressure condensers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160727 Termination date: 20210225 |