CN214371836U - Automatic vacuum device for gain of condenser - Google Patents
Automatic vacuum device for gain of condenser Download PDFInfo
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- CN214371836U CN214371836U CN202120257528.2U CN202120257528U CN214371836U CN 214371836 U CN214371836 U CN 214371836U CN 202120257528 U CN202120257528 U CN 202120257528U CN 214371836 U CN214371836 U CN 214371836U
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Abstract
The utility model discloses an automatic vacuum apparatus for condenser gain, include: the air inlet of the first-stage roots vacuum pump is used for connecting saturated vapor discharged by a condenser, the air inlet of the second-stage roots vacuum pump is connected with the exhaust port of the first-stage roots vacuum pump, the exhaust port of the second-stage roots vacuum pump is connected with the air inlet of the third-stage roots vacuum pump through a boosting condensation tank, the air inlet of the backing pump is connected with the exhaust port of the third-stage roots vacuum pump, the exhaust port of the backing pump is connected with the air inlet of a gas-liquid separator, and the exhaust port of the gas-liquid separator is communicated with outside air. The utility model discloses an ability of bleeding and limit vacuum do not receive the influence of temperature, not only can aspirate non-condensable gas in the condenser, can also partially aspirate saturated vapor simultaneously to reduce the load of condenser, improve the vacuum.
Description
Technical Field
The utility model belongs to the condenser field especially relates to an automatic vacuum apparatus for condenser gain.
Background
With the rapid development of economy in China, the energy conservation and emission reduction also face unprecedented challenges. How to ensure sustainable development and achieve the energy-saving and emission-reducing aims of reducing the total energy consumption of domestic production of a unit by about 20% and reducing the total emission of main pollutants by 10%, all levels of research organizations for the energy-saving and emission-reducing technology of electric power need to be established, and new energy-saving technologies and new energy-saving products of power generation equipment are actively developed.
At present, most of vacuum pumping equipment of a steam turbine set of a coal-fired gas turbine is provided with two sets of 50% capacity common water ring vacuum pumps on a steam side vacuum pumping system of a condenser. When the machine set is in normal operation, one set of the machine set is in operation, and the other set of the machine set is in standby. When the unit is started, the two vacuum pumps are put into operation together, so that the required vacuum degree can be established more quickly, the starting time of the unit is shortened, the equipment establishes vacuum at the initial starting stage of the unit, and the vacuum is maintained in normal operation. But has the following disadvantages: (1) the vacuum pump is unreasonable in design, and vacuum establishment and vacuum maintenance are integrated, so that the energy consumption is high and the system stability is poor in the operation process of the unit; (2) the adopted liquid ring vacuum pump has high power consumption and low efficiency which is generally only about 30 percent; (3) the air exhaust performance of the vacuum pump is limited by the rising of the temperature of working water, and particularly when the temperature is high in summer, the air exhaust performance of the vacuum pump is far away from a design value, so that the vacuum of the condenser is further reduced, the economy of the condenser is reduced, and meanwhile, cavitation is generated inside the water ring type vacuum pump due to the gasification problem, so that equipment is damaged, and even accidents occur.
Because the vacuum degree of the liquid ring pump and the efficiency of the condenser are influenced by saturated steam and are influenced by the ambient temperature, the efficiency of the generator is related to the vacuum degree of the condenser, and according to the analysis of the national electric power research institute, the coal consumption of the unit of the power plant can be reduced by about 4.8g/kW.h when the vacuum degree of the unit of the power plant is improved by 1 percent. In practical application, namely under the condition of equal coal consumption and gas consumption, the steam condenser can increase the generated energy by 1.2 percent when the vacuum degree is improved by 1 percent.
In summary, the existing device has an unobvious energy-saving effect, or has low power generation efficiency in summer, that is, low energy utilization efficiency. Therefore, a proper condenser gain vacuum device is needed, and the device has high energy-saving and economic values.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides an automatic vacuum apparatus for condenser gain can be when summer ambient temperature is higher, can be at equal steam turbine load, equal water temperature under, under not improving the energy consumption, can effectively improve the vacuum.
In order to realize the purpose, the utility model discloses a technical scheme be:
an automated vacuum device for condenser gain comprising: the air inlet of the first-stage roots vacuum pump is used for connecting saturated vapor discharged by a condenser, the air inlet of the second-stage roots vacuum pump is connected with the exhaust port of the first-stage roots vacuum pump, the exhaust port of the second-stage roots vacuum pump is connected with the air inlet of the third-stage roots vacuum pump through a boosting condensation tank, the air inlet of the backing pump is connected with the exhaust port of the third-stage roots vacuum pump, the exhaust port of the backing pump is connected with the air inlet of a gas-liquid separator, and the exhaust port of the gas-liquid separator is communicated with outside air.
Preferably, the backing pump is a dry vacuum pump or a vapor jet pump.
Preferably, the pressure-boosting condensation tank comprises an upper tank and a lower tank, the upper tank is communicated with the lower tank through an external guide pipe, an exhaust port of the upper tank is connected with an air inlet of the three-stage roots vacuum pump, and a liquid outlet of the lower tank is connected with a water inlet of the gas-liquid separator.
More preferably, be equipped with first solenoid valve on the stand pipe, the lower floor jar passes through the second solenoid valve and connects the external gas, be equipped with the third solenoid valve on the leakage fluid dram pipeline of lower floor jar, the lower floor jar is equipped with level sensor, level sensor is used for when detecting the condensate of lower floor jar reachs the liquid level of settlement, to first solenoid valve, second solenoid valve and third solenoid valve send the signal of telecommunication and then control first solenoid valve closes with second solenoid valve, third solenoid valve open.
Preferably, the liquid outlet of the gas-liquid separator is connected with a condensate water return pipeline through a centrifugal pump.
Preferably, a pneumatic shutoff valve, an electric regulating valve and a first pressure transmitter are arranged on an air inlet pipeline of the primary roots vacuum pump.
The optimization effect brought by the optimal scheme is that the pneumatic shutoff valve is used for automatically closing to ensure the safety of the condenser when equipment fails; the electric regulating valve is used for controlling the opening of the air inlet valve, adjusting the air suction capacity and constantly controlling the vacuum degree. The first pressure transmitter monitors the pressure value of an air inlet pipeline of the primary Roots vacuum pump in real time.
Preferably, a temperature transmitter and a second pressure transmitter are arranged on an exhaust port pipeline of the secondary roots vacuum pump and are used for monitoring the pressure and the temperature of saturated steam exhaust in real time; and the gas-liquid separator is provided with a liquid level transmitter for monitoring the liquid level in the gas-liquid separator in real time.
Preferably, an adjustable air valve is arranged on an air inlet pipeline of the three-stage roots vacuum pump and used for sucking the outside air.
The optimization effect that this preferred scheme brought is that the air valve can pump the air of trace, makes the carminative medium of tertiary roots vacuum pump belong to unsaturated humid air to get into subsequent dry vacuum pump, and can not when compressing, appear a large amount of condensate water and lead to equipment to break down.
Compared with the prior art, the beneficial effects of the utility model are that:
1. a automatic vacuum apparatus for condenser gain pass through multistage roots vacuum pump and a backing pump's structure for the air exhaust ability and the extreme vacuum of device do not receive the influence of temperature, the air exhaust ability of the liquid ring pump who adopts in the traditional scheme is far exceeded to the ability of bleeding simultaneously, not only can suck the condenser in the non-condensable gas, can also partly suck saturated vapor simultaneously, thereby reduce the load of condenser, improve vacuum.
2. A installed power that is used for automatic vacuum apparatus of condenser gain will be less than original liquid ring pump, realize the gain effect of electricity generation.
3. A a large amount of comdenstion water that is arranged in condenser gain's automatic vacuum apparatus's the condensing tank that steps up can produce in handling saturated vapor is convenient for in time handle, can not consequently cause the trouble of equipment.
Drawings
Fig. 1 is a schematic structural view of an automatic vacuum device for condenser gain according to the present invention.
Wherein, 1, a first-stage roots vacuum pump; 2. a second-stage Roots vacuum pump; 3. a three-stage Roots vacuum pump; 4. a dry vacuum pump; 5. a pressure boosting condensation tank 51, an upper tank 52 and a lower tank; 6. a gas-liquid separator; 7. a guide tube; 8. a first solenoid valve; 9. a second solenoid valve; 10. a third electromagnetic valve; 11. a liquid level sensor; 12. a centrifugal pump; 13. a pneumatic shut-off valve; 14. an electric control valve; 15. a first pressure transmitter; 16. a second pressure transmitter; 17. a temperature transmitter; 18. a liquid level transmitter; 19. an air valve.
Detailed Description
For a better understanding of the present invention, the contents of the present invention will be further clarified below with reference to the accompanying drawings and examples, but the present invention is not limited to the following examples.
Examples
As shown in fig. 1, an automated vacuum device for condenser gain comprises: one-level roots vacuum pump 1, second grade roots vacuum pump 2, tertiary roots vacuum pump 3 and a backing pump, the air inlet of one-level roots vacuum pump 1 is used for connecting condenser exhaust saturated vapor, the air inlet of second grade roots vacuum pump 2 is connected with one-level roots vacuum pump 1's gas vent, second grade roots vacuum pump 2's gas vent is connected with tertiary roots vacuum pump 3's air inlet through a condensing tank 5 that steps up, the air inlet and the gas vent of tertiary roots vacuum pump 3 of backing pump are connected, the air inlet of vapour and liquid separator 6 is connected to the gas vent of backing pump, the gas vent intercommunication outside air of vapour and liquid separator 6, the leakage fluid dram of vapour and liquid separator 6 passes through centrifugal pump 12 and is connected with the condensate water return pipe. The backing pump is a dry vacuum pump 4 or a vapor jet pump, and in this embodiment, the dry vacuum pump 4 is used.
The pressure-boosting condensation tank 5 comprises an upper tank 51 and a lower tank 52, the upper tank 51 is communicated with the lower tank 52 through an external guide pipe 7, an exhaust port of the upper tank 51 is connected with an air inlet of the three-stage Roots vacuum pump 3, and a liquid outlet of the lower tank 52 is connected with a water inlet of the gas-liquid separator 6. Be equipped with first solenoid valve 8 on the stand pipe 7, lower floor's jar 52 is connected the external gas through second solenoid valve 9, is equipped with third solenoid valve 10 on the leakage fluid dram pipe way of lower floor's jar 52, and lower floor's jar 52 is equipped with level sensor 11, and level sensor 11 is used for when the condensate that detects lower floor's jar 52 reachs the liquid level of settlement, sends the signal of telecommunication to first solenoid valve 8, second solenoid valve 9 and third solenoid valve 10 and then controls first solenoid valve 8 to close and second solenoid valve 9, third solenoid valve 10 open.
The air inlet pipeline of the primary Roots vacuum pump 1 is provided with a pneumatic shutoff valve 13, an electric regulating valve 14 and a first pressure transmitter 15. The pneumatic shutoff valve 13 is used for automatically closing to ensure the safety of the condenser when equipment fails; the electric regulating valve 14 is used for controlling the opening of the air inlet valve, and is used for regulating air suction capacity and constantly controlling vacuum degree. The first pressure transmitter 15 monitors the pressure value of the air inlet pipeline of the primary roots vacuum pump 1 in real time.
A temperature transmitter 17 and a second pressure transmitter 16 are arranged on an exhaust port pipeline of the secondary Roots vacuum pump 2 and are used for monitoring the pressure and the temperature of the exhaust of the saturated water vapor in real time; and the gas-liquid separator 6 is provided with a liquid level transmitter 18 for monitoring the liquid level in the gas-liquid separator 6 in real time.
The air inlet pipeline of the three-stage Roots vacuum pump 3 is provided with an adjustable air valve 19 for sucking the external air and sucking the trace air, so that the exhausted medium of the three-stage Roots vacuum pump 3 belongs to unsaturated wet air and enters the subsequent dry vacuum pump 4, and the equipment cannot break down due to a large amount of condensed water during compression.
The working flow of the automatic vacuum device for the gain of the condenser in the embodiment is as follows, and the primary roots vacuum pump 1 extracts saturated steam from the condenser. Through experimental tests, when the air exhaust capacity of the primary roots vacuum pump 1 is about 4 times that of a liquid ring pump equipped in the traditional scheme, the installed power is about 50% of that of the original liquid ring pump, and the vacuum degree of 500-1000Pa can be improved under the same condition through a large number of tests.
The secondary roots vacuum pump 2 is communicated with the primary roots vacuum pump 1, the compressed gas pressure coming out of the secondary roots vacuum pump 2 is increased by 15-20kpa compared with the air inlet pressure of the primary roots vacuum pump 1, the boiling point temperature of water is higher than the ambient temperature by about 8-10 degrees according to the pressure-temperature curve of saturated vapor pressure, and the saturated vapor can be effectively condensed by cooling water at normal temperature, so that more condensed water is obtained.
The second-stage roots vacuum pump 2 is then communicated with the pressure boosting condensation tank 5, the water vapor coming out of the second-stage roots vacuum pump 2 enters the upper tank 51 of the pressure boosting condensation tank 5, the first electromagnetic valve 8 on the guide pipe 7 is in an open state at the moment, the upper tank 51 is communicated with the lower tank 52, and the condensate flows into the lower tank 52. When the liquid level sensor 11 detects that the condensate in the lower tank 52 reaches a set liquid level, the first electromagnetic valve 8 is controlled to be closed, the upper tank 51 and the lower tank 52 are cut off, the second electromagnetic valve 9 and the third electromagnetic valve 10 are opened simultaneously, air is supplemented into the lower tank 52, vacuum is broken, and the condensate is conveyed into the gas-liquid separator 6 through the third electromagnetic valve 10 by using pressure.
The water vapor discharged from the exhaust port of the upper tank 51 of the pressure boosting condensation tank 5 enters the three-stage Roots vacuum pump 3, the exhaust pressure is further increased by compression and temperature rise to reach about 30kpa, and finally the dry vacuum pump 4 is adopted for pumping, because the gas pressure from the pressure boosting condensation tank 5 is higher, the temperature is inevitably increased after the gas is compressed by the three-stage Roots vacuum pump 3, and the gas is ensured to be changed into unsaturated gas. At this time, the air inlet pipeline of the three-stage roots vacuum pump 3 is also provided with an adjustable air inlet valve 19 for sucking external trace air, so that the exhausted medium of the three-stage roots vacuum pump 3 belongs to unsaturated wet air and enters the subsequent dry vacuum pump 4, and the equipment cannot be failed due to a large amount of condensed water during compression.
Unsaturated wet air from the three-stage Roots vacuum pump 3 enters a dry vacuum pump 4, is compressed and then enters a gas-liquid separator 6, is cooled by condensation, is cooled again to saturated vapor, is condensed to recover partial vapor, passes through the gas-liquid separator 6, is directly discharged, and the recovered condensed water and the condensed water recovered by the pressure-boosting condensation tank 5 are sent back to the original condensed water return pipeline through a centrifugal pump 12.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. An automated vacuum device for condenser gain, comprising: the air inlet of the first-stage roots vacuum pump is used for connecting saturated vapor discharged by a condenser, the air inlet of the second-stage roots vacuum pump is connected with the exhaust port of the first-stage roots vacuum pump, the exhaust port of the second-stage roots vacuum pump is connected with the air inlet of the third-stage roots vacuum pump through a boosting condensation tank, the air inlet of the backing pump is connected with the exhaust port of the third-stage roots vacuum pump, the exhaust port of the backing pump is connected with the air inlet of a gas-liquid separator, and the exhaust port of the gas-liquid separator is communicated with outside air.
2. An automated vacuum apparatus for condenser gain according to claim 1, wherein the backing pump is a dry vacuum pump or a steam jet pump.
3. The automated vacuum device for condenser augmentation as claimed in claim 1, wherein the pressure-boosting condensate tank comprises an upper tank and a lower tank, the upper tank and the lower tank are communicated through an external guide pipe, an exhaust port of the upper tank is connected with an air inlet of the three-stage roots vacuum pump, and a liquid outlet of the lower tank is connected with a water inlet of the gas-liquid separator.
4. The automatic vacuum device for the condenser gain according to claim 3, wherein a first electromagnetic valve is arranged on the guide pipe, the lower layer tank is connected with external air through a second electromagnetic valve, a third electromagnetic valve is arranged on a drain pipe of the lower layer tank, a liquid level sensor is arranged on the lower layer tank, and the liquid level sensor is used for sending electric signals to the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve when detecting that condensate of the lower layer tank reaches a set liquid level so as to control the first electromagnetic valve to be closed and the second electromagnetic valve and the third electromagnetic valve to be opened.
5. The automated vacuum device for condenser gaining as claimed in claim 1 wherein the drain of the gas-liquid separator is connected to the condensate return pipe by a centrifugal pump.
6. The automated vacuum apparatus for condenser gaining as claimed in claim 1, wherein the air inlet pipe of the primary roots vacuum pump is provided with a pneumatic shut-off valve and an electric control valve, and a first pressure transmitter.
7. The automated vacuum device for the condenser gain according to claim 1, wherein a temperature transmitter and a second pressure transmitter are arranged on an exhaust pipeline of the secondary roots vacuum pump and are used for monitoring the pressure and the temperature of the exhaust of saturated steam in real time; and the gas-liquid separator is provided with a liquid level transmitter for monitoring the liquid level in the gas-liquid separator in real time.
8. The automated vacuum device for condenser gaining as claimed in claim 1, wherein the air inlet pipe of the three-stage roots vacuum pump is provided with an adjustable air valve for sucking the outside air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257528.2U CN214371836U (en) | 2021-01-29 | 2021-01-29 | Automatic vacuum device for gain of condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120257528.2U CN214371836U (en) | 2021-01-29 | 2021-01-29 | Automatic vacuum device for gain of condenser |
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| Publication Number | Publication Date |
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| CN214371836U true CN214371836U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120257528.2U Active CN214371836U (en) | 2021-01-29 | 2021-01-29 | Automatic vacuum device for gain of condenser |
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| CN (1) | CN214371836U (en) |
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2021
- 2021-01-29 CN CN202120257528.2U patent/CN214371836U/en active Active
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