CN105202937A - Cavitation-free low-noise condenser vacuumizing energy-saving device - Google Patents
Cavitation-free low-noise condenser vacuumizing energy-saving device Download PDFInfo
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- CN105202937A CN105202937A CN201510654776.XA CN201510654776A CN105202937A CN 105202937 A CN105202937 A CN 105202937A CN 201510654776 A CN201510654776 A CN 201510654776A CN 105202937 A CN105202937 A CN 105202937A
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Abstract
The invention discloses a cavitation-free low-noise condenser vacuumizing energy-saving device. The device comprises an air sucking pipeline, a manual valve, a pneumatic butterfly valve, a variable-frequency high-pressure-difference dry type lobe pump, an automatic-adjustment spraying device, a first condenser, a vacuum breaking device, a variable-frequency cone two-stage pump, a separator, a second condenser, a constant-pressure variable-frequency control device, a silencing machine box and a check valve. The air amount inside the condensers changes irregularly, the pumping speed and compression ratio can be automatically adjusted when environment temperature is increased, a system is prevented from tripping and being shut down or a standby pump is prevented from being started, system reliability is improved, energy consumption is lowered, cavitation and accidental shutdown water return are prevented, a scaling problem is solved, and noise pollution is effectively reduced.
Description
Technical field
The invention belongs to vacuum pumping technology field, relate to a kind of Vacuumization energy-saving device, especially a kind of condenser Vacuumization energy-saving device without cavitation low noise.
Background technology
Thermal power plant condenser vacuum extractor, traditional design is the design of single-stage water ring vacuum pump group, injector or Roots's water ring combination pump group.In use, described device can not regulate pumping speed and pressure ratio automatically, and efficiency low energy consumption is large; Not solving the problem that vacuum plant can raise along with suction temperature, pump Inner eycle water temperature raises, easily there is cavitation in vavuum pump inside, causes pumping speed and vacuum pressure to decline; Do not have noise reduction measure, described device noise even can reach more than 100 decibels.
Application number be 201310006450.7 and 201310485878.4 Chinese patent disclose a kind of devices and methods therefor maintaining thermal power plant condenser vacuum, adopt the combined system of air cooling lobe pump+water ring vacuum pump, solve single water ring vacuum pump pumping speed and pressure problem affected by environment, energy-saving effect is comparatively obvious.But when condenser internal leakage tolerance change greatly, temperature rise increase time, system can trip or start stand-by pump, cause shut down or energy consumption increase; Although the gas after temperature rise is lowered the temperature through interconderser, but just ensure the pumping speed of water ring vacuum pump after suction water ring vacuum pump as far as possible, unresolved vavuum pump problem of cavitation, vacuum pressure and pumping speed is caused to decline, impeller fracture can be there is time serious, and can fouling be there is in condenser and water ring vacuum pump, cause that component wear, electric current increase, rate of air sucked in required declines; From lectotype selection and structural design, do not consider the noise problem of integral device, common air cooling lobe pump when inspiratory capacity fluctuates noise even more than 100 decibels; And this maintenance equipment does not have vacuum breaking device, instant cut-off or water when shutting down in water ring vacuum pump can return in lobe pump and system, cause lobe pump internal gear emulsification of lubricant.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, a kind of condenser Vacuumization energy-saving device without cavitation low noise is provided.
The object of the invention is to be achieved through the following technical solutions:
This kind, without the condenser Vacuumization energy-saving device of cavitation low noise, is comprised cabinet and to be arranged in cabinet and the suction line, Pneumatic butterfly valve, the frequency conversion High Pressure Difference dry type lobe pump that are connected by pipeline successively, automatically to regulate spray equipment, the first condenser, frequency conversion cone two-stage pump, separator and check-valves; Pipeline between described frequency conversion cone two-stage pump and the first condenser is also connected with vacuum breaking device; The second condenser is connected with between frequency conversion cone two-stage pump and separator; Described frequency conversion cone two-stage pump and frequency conversion High Pressure Difference dry type lobe pump are all connected with constant pressure frequency conversion control device.
Further, the hand-operated valve thoroughly cut off also is installed between suction line and Pneumatic butterfly valve.
Further, above-mentioned Pneumatic butterfly valve connects the air entry of frequency conversion High Pressure Difference dry type lobe pump; The exhaust outlet of frequency conversion High Pressure Difference dry type lobe pump connects the hot import automatically regulating spray equipment; Cold outlet connection first condenser of described automatic adjustment spray equipment, described first condenser connects vacuum breaking device, and vacuum breaking device connects the air inlet of frequency conversion cone two-stage pump, and the exhaust outlet of frequency conversion cone two-stage pump connects the air inlet of separator; Described separator divides two-way to connect: the exhaust outlet of a road separator connects the hot import of the second condenser, and the cold outlet of the second condenser connects the water supplement port of cone two-stage pump, and the exhaust outlet of another road separator connects check-valves; Described check-valves connects exhaust main road.
Above-mentioned constant pressure frequency conversion control device is arranged on quiet case.Described cabinet is quiet case.
Above-mentioned vacuum breaking device forms the automatic air-breathing vacuum breaking device of negative pressure by negative pressure electromagnetic actuator, dust guard, silencer.
Above-mentioned frequency conversion High Pressure Difference dry type lobe pump is provided with twisting blade profile rotor, is that " low pulse " spatters the lobe pump expanding runner at described frequency conversion High Pressure Difference dry type lobe pump.
The signal access DCS control system of the condenser vacuum that above-mentioned constant pressure frequency conversion control device detects pressure transmitter, automatically actual vacuum P2 is converted in DCS control system inside, the operating frequency reconciling frequency converter is outputed signal with the difference MV=P2-P1 between the vacuum P1 of the need of production of vacuum P2 and setting, compression ratio between frequency conversion High Pressure Difference dry type lobe pump and frequency conversion twin-stage cone vavuum pump during automatic adjustment airflow fluctuation, to reach vacuum pumping speed required under low energy consumption.
The present invention has following beneficial effect:
Condenser Vacuumization energy-saving device without cavitation low noise of the present invention is when the irregular change of the inner tolerance of condenser, environment temperature raise; can automatically regulate pumping speed and compression ratio; prevent system trip from shutting down or stand-by pump startup; improve system reliability; reduce energy consumption; prevent cavitation and hang-up from returning water, solve scale problems, effectively reduce noise pollution.And automatically regulate spray equipment 5 owing to being provided with, effectively prevent in condenser and water ring vacuum pump and fouling can occur, cause the generation that component wear, electric current increase, rate of air sucked in required declines.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the operation logic schematic diagram of the embodiment of the present invention.
Wherein: 1. suction line, 2. hand-operated valve, 3. Pneumatic butterfly valve, 4. frequency conversion High Pressure Difference dry type lobe pump, 5. automatically regulate spray equipment, 6. the first condenser, 7. vacuum breaking device, 8. frequency conversion cone two-stage pump, 9. separator, 10. the second condenser, 11. constant pressure frequency conversion control device, 12. cabinets, 13. check-valves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1: the condenser Vacuumization energy-saving device without cavitation low noise of the present invention, comprise cabinet 12 and to be arranged in cabinet 12 and the suction line 1, Pneumatic butterfly valve 3, the frequency conversion High Pressure Difference dry type lobe pump 4 that are connected by pipeline successively, automatically to regulate spray equipment 5, first condenser 6, frequency conversion cone two-stage pump 8, separator 9 and check-valves 13; Pipeline between described frequency conversion cone two-stage pump 8 and the first condenser 6 is also connected with vacuum breaking device 7; The second condenser 10 is connected with between frequency conversion cone two-stage pump 8 and separator 9; Described frequency conversion cone two-stage pump 8 and frequency conversion High Pressure Difference dry type lobe pump 4 are all connected with constant pressure frequency conversion control device 11.
Concrete annexation is as follows:
Pneumatic butterfly valve 3 connects the air entry of frequency conversion High Pressure Difference dry type lobe pump 4; The exhaust outlet of frequency conversion High Pressure Difference dry type lobe pump 4 connects the hot import automatically regulating spray equipment 5; Cold outlet connection first condenser 6 of described automatic adjustment spray equipment 5, described first condenser 6 connects vacuum breaking device 7, and vacuum breaking device 7 connects the air inlet of frequency conversion cone two-stage pump 8, and the exhaust outlet of frequency conversion cone two-stage pump 8 connects the air inlet of separator 9; Described separator 9 points of two-way connect: the exhaust outlet of a road separator 9 connects the hot import of the second condenser 10, and the cold outlet of the second condenser 10 connects the water supplement port of cone two-stage pump 8, and the exhaust outlet of another road separator 9 connects check-valves 13; Described check-valves 13 connects exhaust main road.
In most preferred embodiment of the present invention, the hand-operated valve 2 thoroughly cut off also is installed between suction line 1 and Pneumatic butterfly valve 3.Constant pressure frequency conversion control device 11 is arranged on quiet case 12.Described cabinet 12 is quiet case.Vacuum breaking device 7 forms the automatic air-breathing vacuum breaking device of negative pressure by negative pressure electromagnetic actuator, dust guard, silencer.Frequency conversion High Pressure Difference dry type lobe pump 4 is provided with twisting blade profile rotor, is that " low pulse " spatters the lobe pump expanding runner at described frequency conversion High Pressure Difference dry type lobe pump 4.
The signal access DCS control system of the condenser vacuum that above-mentioned constant pressure frequency conversion control device 11 detects pressure transmitter, automatically actual vacuum P2 is converted in DCS control system inside, the operating frequency reconciling frequency converter is outputed signal with the difference MV=P2-P1 between the vacuum P1 of the need of production of vacuum P2 and setting, compression ratio between frequency conversion High Pressure Difference dry type lobe pump 4 and frequency conversion twin-stage cone vavuum pump 8 during automatic adjustment airflow fluctuation, to reach vacuum pumping speed required under low energy consumption.
If Fig. 2 is operation logic schematic diagram of the present invention, be below the functional interpretation of each parts of the present invention:
Hand-operated valve 2: thorough and system shutdown.
Pneumatic butterfly valve 3: realize the action of system automatic start-stop linked switch.
Frequency conversion High Pressure Difference dry type lobe pump 4: be different from common air cooling lobe pump.Its inside is special twisting blade profile rotor and has " low pulse " to spatter the lobe pump expanding runner at exhaust ports design, the pressure fluctuations amplitude of exhaust moment can be reduced, reduce aerodynamic noise and temperature rise from energy source, realize noise reduction environment-friendly function together with quiet case 12; Described lobe pump is dry pump, and pumping speed is fast, not easily influenced by ambient temperature, can accelerate condenser vacuum pumping rate; Make use of frequency conversion cone two-stage vacuum pump 8 pumping speed when decaying to minimum, the feature that described lobe pump pumping speed is maximum, improve operating efficiency, installed power can drop to 1/8 of legacy equipment.
Automatic adjustment spray equipment 5: avoid condenser and water ring vacuum pump fouling; Automatically regulate spray by vacuum pressure, reduce the delivery temperature of frequency conversion High Pressure Difference dry type lobe pump 4.
First condenser 6: carry out reducing temperature twice to by the gas after spraying cooling, gas volume is made to be reduced to below half, ensure that gas does not reach the temperature conditions of cavitation after sucking frequency conversion cone two-stage vacuum pump 8, thus solve problem of cavitation, increase work efficiency.
Vacuum breaking device 7: the automatic air-breathing vacuum breaking device of a kind of negative pressure be made up of negative pressure electromagnetic actuator, dust guard, silencer, equipment break down or power-off time, pressure reduction between balance lobe pump 4 and frequency conversion cone two-stage vacuum pump 8, prevent the water in water ring vacuum pump from returning in lobe pump 4 and system, cause lobe pump internal gear emulsification of lubricant.
Frequency conversion cone two-stage vacuum pump 8: as the fore pump of lobe pump 4, carries to system forvacuum the gas that lobe pump 4 is discharged, and the unique texture sat by secondary buck configuration in pump and cone wind, is reduced compression ratio, solve problem of cavitation further.
Separator 9, second condenser 10: jointly form the working solution enclosed ring circulatory system with frequency conversion cone vavuum pump 8, reduces the waste at water source.
Constant pressure frequency conversion control device 11: the signal access DCS control system of the condenser vacuum that pressure transmitter detects, automatically actual vacuum P2 is converted in DCS inside, the operating frequency reconciling frequency converter is outputed signal by the difference (MV=P2-P1) between the vacuum P1 of the need of production of P2 and setting, compression ratio between frequency conversion High Pressure Difference dry type lobe pump 4 and frequency conversion twin-stage cone vavuum pump 8 during automatic adjustment airflow fluctuation, to reach vacuum pumping speed required under low energy consumption.
Cabinet 12: the 1-2-3 subharmonic that high speed pump brings high-frequency pneumatic fundamental frequency noise to produce, is absorbed by the double-layer sound-absorption sponge of super-silent cabinet internal layer, makes noise be reduced to less than 75 decibels, efficiently solve the defect that existing vavuum pump group noise is high.
Check-valves 13: break down or power-off time, instantaneously by pump group and atmospheric isolation, destroy vacuum in pump group by vacuum breaking device 7, prevent water in water ring vacuum pump from returning frequency conversion High Pressure Difference dry type lobe pump 4 and system.
The present invention is a kind of condenser Vacuumization energy-saving device without cavitation low noise, also can be applicable to the environment of other similar operating condition, solution serious cavitation erosion, the problem that energy consumption is large, noise is large.
The present invention is not limited to above-mentioned detailed description of the invention, and person skilled in art is not when departing from the spirit and scope of technical solution of the present invention, and the amendment carry out this programme or equivalent replacement, also should fall into the protection domain of claim of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (8)
1. the condenser Vacuumization energy-saving device without cavitation low noise, it is characterized in that, comprise cabinet (12) and to be arranged in cabinet (12) and the suction line (1), Pneumatic butterfly valve (3), frequency conversion High Pressure Difference dry type lobe pump (4) that are connected by pipeline successively, automatically to regulate spray equipment (5), the first condenser (6), frequency conversion cone two-stage pump (8), separator (9) and check-valves (13); Pipeline between described frequency conversion cone two-stage pump (8) and the first condenser (6) is also connected with vacuum breaking device (7); The second condenser (10) is connected with between frequency conversion cone two-stage pump (8) and separator (9); Described frequency conversion cone two-stage pump (8) and frequency conversion High Pressure Difference dry type lobe pump (4) are all connected with constant pressure frequency conversion control device (11).
2. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, is characterized in that, is also provided with the hand-operated valve (2) thoroughly cut off between suction line (1) and Pneumatic butterfly valve (3).
3. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, is characterized in that, described Pneumatic butterfly valve (3) connects the air entry of frequency conversion High Pressure Difference dry type lobe pump (4); The exhaust outlet of frequency conversion High Pressure Difference dry type lobe pump (4) connects the hot import automatically regulating spray equipment (5); Cold outlet connection first condenser (6) of described automatic adjustment spray equipment (5), described first condenser (6) connects vacuum breaking device (7), vacuum breaking device (7) connects the air inlet of frequency conversion cone two-stage pump (8), and the exhaust outlet of frequency conversion cone two-stage pump (8) connects the air inlet of separator (9); Described separator (9) point two-way connects: the exhaust outlet of a road separator (9) connects the hot import of the second condenser (10), the cold outlet of the second condenser (10) connects the water supplement port of cone two-stage pump (8), and the exhaust outlet of another road separator (9) connects check-valves (13); Described check-valves (13) connects exhaust main road.
4. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, is characterized in that, constant pressure frequency conversion control device (11) is arranged on quiet case (12).
5. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, is characterized in that, described cabinet (12) is quiet case.
6. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, is characterized in that, described vacuum breaking device (7) forms the automatic air-breathing vacuum breaking device of negative pressure by negative pressure electromagnetic actuator, dust guard, silencer.
7. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, it is characterized in that, described frequency conversion High Pressure Difference dry type lobe pump (4) is provided with twisting blade profile rotor, is that " low pulse " spatters the lobe pump expanding runner described frequency conversion High Pressure Difference dry type lobe pump (4).
8. the condenser Vacuumization energy-saving device without cavitation low noise according to claim 1, it is characterized in that, the signal access DCS control system of the condenser vacuum that described constant pressure frequency conversion control device (11) detects pressure transmitter, automatically actual vacuum P2 is converted in DCS control system inside, the operating frequency reconciling frequency converter is outputed signal with the difference MV=P2-P1 between the vacuum P1 of the need of production of vacuum P2 and setting, compression ratio between frequency conversion High Pressure Difference dry type lobe pump (4) and frequency conversion twin-stage cone vavuum pump (8) during automatic adjustment airflow fluctuation, to reach vacuum pumping speed required under low energy consumption.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510654776.XA CN105202937B (en) | 2015-10-10 | 2015-10-10 | A kind of condenser Vacuumization energy-saving device without cavitation low noise |
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| CN201510654776.XA CN105202937B (en) | 2015-10-10 | 2015-10-10 | A kind of condenser Vacuumization energy-saving device without cavitation low noise |
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| CN105202937B CN105202937B (en) | 2017-06-20 |
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Cited By (4)
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| CN105865219A (en) * | 2016-04-19 | 2016-08-17 | 刘子旺 | Multi-stage hot-pressing type vacuum pumping system |
| WO2018010536A1 (en) * | 2016-07-12 | 2018-01-18 | 上海伊莱茨真空技术有限公司 | Three-level roots water-ring intelligent frequency conversion control vacuum system and control method therefor |
| CN107830742A (en) * | 2017-12-04 | 2018-03-23 | 武汉艾德沃泵阀有限公司 | A kind of system complete equipment that vacuum is kept for steam-condenser of thermal power plants |
| CN109813137A (en) * | 2019-03-13 | 2019-05-28 | 西安热工研究院有限公司 | A kind of vacuum pump system that can be contributed according to suction air capacity adjustment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109813137A (en) * | 2019-03-13 | 2019-05-28 | 西安热工研究院有限公司 | A kind of vacuum pump system that can be contributed according to suction air capacity adjustment |
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