CN216347907U - Cold end optimization comprehensive efficiency improving device for thermal power generating unit - Google Patents
Cold end optimization comprehensive efficiency improving device for thermal power generating unit Download PDFInfo
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- CN216347907U CN216347907U CN202122526465.9U CN202122526465U CN216347907U CN 216347907 U CN216347907 U CN 216347907U CN 202122526465 U CN202122526465 U CN 202122526465U CN 216347907 U CN216347907 U CN 216347907U
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Abstract
The utility model discloses an optimized comprehensive efficiency-improving device for a cold end of a thermal power generating unit, which comprises a jet entrainment processor, a liquid separator, a water seal secondary separator, a condensation unit, a primary U-shaped water seal, a secondary condensate water seal and a steam exhaust device, wherein the jet entrainment processor is connected with the steam exhaust device and an air cooling island; the jet flow entrainment processor is connected with a water replenishing pipeline through an electric adjusting valve, an electric butterfly valve and a manual valve, the jet flow entrainment processor is connected with the condensation unit and the air inlet of the vacuum pump through a liquid separator, and the hot water outlet of the liquid separator is connected with the water seal secondary separator; the water seal secondary separator is connected with the steam exhaust device through a manual valve and a U-shaped water seal. The non-condensed gas enters the primary vacuum generator and the vacuum pump, and the condensed liquid is discharged into the exhaust device, so that the heat is discharged into the exhaust device, and the vacuum state in the condenser is ensured.
Description
Technical Field
The utility model relates to the technical field of energy conservation and environmental protection, in particular to a cold end optimization comprehensive efficiency improving device for a thermal power generating unit.
Background
At present, most cold end systems of power plants in China have the problem of high energy consumption. In northern areas, the temperature difference between winter and summer and day and night is large, so that the volume flow of the gas-steam mixture to be extracted from the air-cooled condenser is large, and if the gas-steam mixture cannot be extracted in time by a vacuum-pumping system, the heat exchange effect of the air-cooled condenser can be greatly reduced. Most notably, the condenser is used as an important device of a cold end system, and people tend to underestimate the influence on energy consumption caused by vacuum deterioration caused by vacuum pumping equipment, and pay more attention to the influence of steam parameters on the thermal efficiency of a unit. According to statistics, in a power plant in China, the problem that 30 ten thousand of unit condensers are low in vacuum is the most serious, and the vacuum is 3% -6% lower than the design value. In addition, the larger the unit, the more significant the benefit of cold end system improvements.
In fact, the vacuum pump with better efficiency cannot completely suck, boost and discharge the gas in the condenser, the vacuum of the condenser can only be infinitely close to the ultimate vacuum of the water ring vacuum pump, and the theoretical vacuum can never be reached, which indicates that a part of gas always exists in the condenser, and the influence of the gas on the ambient temperature is particularly great. According to the gas state equation, the temperature of the condenser cooling water is low in winter, so that the temperature of the gas reserved on the steam side of the condenser is low, the volume of the condenser is reduced, the volume of the condenser is unchanged, the vacuum of the condenser is relatively good, and otherwise, the vacuum of the condenser is relatively poor. Similarly, when the load is low, because the exhaust steam quantity of the low-pressure cylinder is reduced, the cooling water quantity of the condenser is unchanged, the outlet water temperature of the cooling water of the condenser is reduced, the temperature of the gas reserved on the steam side of the condenser is also reduced, the volume of the condenser is unchanged, the vacuum of the condenser is relatively good, and otherwise, the vacuum of the condenser is relatively poor. Similarly, when the load is high, the exhaust temperature of the condenser rises, so that the volume of gas reserved in the condenser is expanded by heating, partial space of the condenser is occupied, and finally the vacuum of the condenser is reduced to some extent. In the prior art, the vacuum of the condenser is maintained at a low level due to the high temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect that the vacuum of a condenser is maintained at a lower level due to higher temperature in the prior art, and provides an optimized comprehensive efficiency improving device for the cold end of a thermal power unit.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an optimized comprehensive efficiency-improving device for a cold end of a thermal power generating unit comprises a jet entrainment processor, a liquid separator, a water seal secondary separator, a condensing unit, a primary U-shaped water seal, a secondary condensate water seal and a steam exhaust device, wherein the jet entrainment processor is connected with the steam exhaust device and an air cooling island;
the jet flow entrainment processor is connected with a water replenishing pipeline through an electric adjusting valve, an electric butterfly valve and a manual valve, the jet flow entrainment processor is connected with the condensation unit through a liquid separator, and a hot water outlet of the liquid separator is connected with the water seal secondary separator;
the water seal secondary separator is connected with the steam exhaust device through a manual valve and a U-shaped water seal, and the water seal secondary separator is connected with the condensate water tank through a manual valve, a shielded pipeline pump, an electric adjusting valve and a check valve.
The condensation unit comprises a primary vacuum generator, a primary condenser, a secondary vacuum generator and a secondary condenser, wherein the primary vacuum generator is connected with the jet entrainment processor through a liquid separator, the primary vacuum generator and the secondary vacuum generator are connected with an auxiliary steam main pipe through a manual valve, an electric adjusting valve and an electric butterfly valve, the primary condenser is connected with an open circulating water inlet pipe through the manual valve, the primary condenser is respectively connected with the primary vacuum generator and the secondary vacuum generator through the manual valve and condenses a large amount of water vapor from the primary vacuum generator, the condensed water flows into a primary U-shaped water seal through a primary water inlet of the primary condenser, the number of the primary condensers is two, the secondary condenser is communicated with the secondary vacuum generator and a vacuum pump exhaust pipe and condenses partial steam brought by the secondary vacuum generator, and the condensed water is discharged into a steam exhaust device through a secondary water conveying port of the secondary condenser and a secondary condensate water seal.
Preferably, the first-stage condenser is connected with the second-stage condenser through a manual valve, and the second-stage condenser is connected with the open type circulating water return pipe through the manual valve.
Preferably, the liquid separator and the first-stage condenser are connected with the steam exhaust device through a first-stage U-shaped water seal, and the second-stage condenser is connected with the steam exhaust device through a second-stage condensate water seal.
Preferably, the electric regulating valve is electrically connected with an automatic control system.
Compared with the prior art, the utility model has the beneficial effects that:
1. after the device is put into use, the condensable part in the mixed gas is condensed inside the jet entrainment processor when passing through the jet entrainment processor, and the subsequent gas-steam mixture supplements the jet entrainment processor to ensure that the inside of the jet entrainment processor reaches a balanced state, so that the vacuum equipment increases the suction amount of the non-condensable gas.
2. Noncondensable gas is through getting into one-level vacuum generator and vacuum pump in, the gaseous discharge in the vacuum pump, the gas input in the one-level vacuum generator is condensed in the one-level condenser, liquid after the condensation passes through one-level U type water seal and gets into the exhaust apparatus, and one-level condenser quantity is two, the work efficiency of the device has been accelerated, gas after handling through the one-level condenser is carried to the second grade condenser, liquid after the condensation passes through the second grade condensate water seal and discharges to the exhaust apparatus in, make the device bulk temperature maintain a lower level, vacuum state in the condenser is guaranteed.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
In the figure: 1 jet entrainment treater, 2 knockout, 3 water seal secondary separators, 4 one-level vacuum generators, 5 one-level condensers, 6 two-level vacuum generators, 7 two-level condensers, 8 one-level U-shaped water seals, 9 two-level condensate water seals, 10 steam exhaust devices, 11 electric adjusting valves, 12 electric butterfly valves, 13 manual valves, 14 moisturizing pipelines, 15U-shaped water seals, 16 auxiliary steam main pipes, 17 open circulating water inlet pipes, 18 one-level water outlets, 19 two-level water outlets, 20 open circulating water return pipes, 21 condensing water tanks, 22 shielded pipeline pumps, 23 check valves, 24 air cooling islands and 25 vacuum pump exhaust pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the optimized comprehensive efficiency-improving device for the cold end of the thermal power generating unit comprises a jet entrainment processor 1, a liquid separator 2, a water seal secondary separator 3, a condensation unit, a primary U-shaped water seal 8, a secondary condensate water seal 9 and an exhaust device 10, wherein the jet entrainment processor 1 is connected with the exhaust device 10 and an air cooling island 24; the jet entrainment processor 1 is connected with a water replenishing pipeline 14 through an electric adjusting valve 11, an electric butterfly valve 12 and a manual valve 13, the jet entrainment processor 1 is connected with a condensation unit through a liquid separator 2, and a hot water outlet of the liquid separator 2 is connected with a water seal secondary separator 3; the water seal secondary separator 3 is connected with the steam exhaust device 10 through a manual valve 13 and a U-shaped water seal 15, and the water seal secondary separator 3 is connected with the condensate water tank 21 through the manual valve 13, a shielded pipeline pump 22, an electric adjusting valve 11 and a check valve 23.
The further primary vacuum generator 4 and the secondary vacuum generator 6 continuously pump out the non-condensable gas from the liquid separator 2 under the steam jet action of the auxiliary steam main pipe 16 to form vacuum.
The further condensation unit comprises a first-stage vacuum generator 4, a first-stage condenser 5, a second-stage vacuum generator 6 and a second-stage condenser 7, wherein the first-stage vacuum generator 4 is connected with the jet entrainment processor 1 through a liquid separator 2, the first-stage vacuum generator 4 and the second-stage vacuum generator 6 are connected with an auxiliary steam main pipe 16 through a manual valve 13, an electric adjusting valve 11 and an electric butterfly valve 12, the first-stage condenser 5 is connected with an open circulating water inlet pipe 17 through the manual valve 13, the first-stage condenser 5 is respectively connected with the first-stage vacuum generator 4 and the second-stage vacuum generator 6 through the manual valve 13 and condenses a large amount of water vapor from the first-stage vacuum generator 4, condensed water flows into a first-stage U-shaped water seal 8 through a first-stage water inlet 18 of the first-stage condenser 5, the number of the first-stage condensers 5 is two, and the second-stage condenser 7 is communicated with the second-stage vacuum generator 6 and a vacuum pump exhaust pipe 25, and part of steam brought by the secondary vacuum generator 6 is condensed, and the condensed water is discharged into a steam exhaust device 10 through a secondary water conveying port 19 of a secondary condenser 7 and a secondary condensate water seal 9.
The further primary condenser 5 is connected with the secondary condenser 7 through a manual valve 13, and the secondary condenser 7 is connected with an open circulating water return pipe 20 through the manual valve 13.
The further liquid separator 2 and the first-stage condenser 5 are connected with a steam exhaust device 10 through a first-stage U-shaped water seal 8, and the second-stage condenser 7 is connected with the steam exhaust device 10 through a second-stage condensate water seal 9.
The further electric regulating valve 11 is electrically connected with an automatic control system, and the electric regulating valve is intelligent PID automatic regulation based on model prediction.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (5)
1. The optimized comprehensive effect-improving device for the cold end of the thermal power generating unit is characterized by comprising a jet entrainment processor (1), a liquid separator (2), a water seal secondary separator (3), a condensation unit, a primary U-shaped water seal (8), a secondary condensate water seal (9) and a steam exhaust device (10), wherein the jet entrainment processor (1) is connected with the steam exhaust device (10) and an air cooling island (24);
the jet flow entrainment processor (1) is connected with a water replenishing pipeline (14) through an electric adjusting valve (11), an electric butterfly valve (12) and a manual valve (13), the jet flow entrainment processor (1) is connected with a condensation unit through a liquid separator (2), and a hot water outlet of the liquid separator (2) is connected with a water seal secondary separator (3);
the water seal secondary separator (3) is connected with the steam exhaust device (10) through a manual valve (13) and a U-shaped water seal (15), and the water seal secondary separator (3) is connected with the condensation water tank (21) through the manual valve (13), a shielded pipeline pump (22), an electric adjusting valve (11) and a check valve (23).
2. The cold end optimization comprehensive efficiency improving device for the thermal power generating unit as claimed in claim 1, wherein the condensing unit comprises a primary vacuum generator (4), a primary condenser (5), a secondary vacuum generator (6) and a secondary condenser (7), the primary vacuum generator (4) is connected with the jet entrainment processor (1) through a liquid separator (2), the primary vacuum generator (4) and the secondary vacuum generator (6) are both connected with an auxiliary steam main pipe (16) through a manual valve (13), an electric adjusting valve (11) and an electric butterfly valve (12), the primary condenser (5) is connected with an open circulating water inlet pipe (17) through the manual valve (13), the primary condenser (5) is respectively connected with the primary vacuum generator (4) and the secondary vacuum generator (6) through the manual valve (13) and condenses a large amount of water vapor from the primary vacuum generator (4), condensate water flows into a one-level U-shaped water seal (8) through a one-level water conveying port (18) of a one-level condenser (5), the number of the one-level condenser (5) is two, a second-level condenser (7) is communicated with a second-level vacuum generator (6) and a vacuum pump to exhaust a large air pipe (25), partial steam brought by the second-level vacuum generator (6) is condensed, and condensed water is discharged into an exhaust device (10) through a second-level water conveying port (19) of the second-level condenser (7) through a second-level condensate water seal (9).
3. The cold end optimization comprehensive efficiency improving device for the thermal power generating unit as claimed in claim 2, wherein the primary condenser (5) and the secondary condenser (7) are connected through a hand valve (13), and the secondary condenser (7) is connected with an open circulating water return pipe (20) through the hand valve (13).
4. The cold end optimization comprehensive efficiency improving device for the thermal power generating unit as claimed in claim 2, wherein the liquid separator (2) and the primary condenser (5) are connected with the steam exhaust device (10) through a primary U-shaped water seal (8), and the secondary condenser (7) is connected with the steam exhaust device (10) through a secondary condensate water seal (9).
5. The cold end optimization comprehensive efficiency improving device for the thermal power generating unit as claimed in claim 1, wherein the electric regulating valve (11) is electrically connected with an automatic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122526465.9U CN216347907U (en) | 2021-10-20 | 2021-10-20 | Cold end optimization comprehensive efficiency improving device for thermal power generating unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122526465.9U CN216347907U (en) | 2021-10-20 | 2021-10-20 | Cold end optimization comprehensive efficiency improving device for thermal power generating unit |
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| Publication Number | Publication Date |
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| CN216347907U true CN216347907U (en) | 2022-04-19 |
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| CN202122526465.9U Active CN216347907U (en) | 2021-10-20 | 2021-10-20 | Cold end optimization comprehensive efficiency improving device for thermal power generating unit |
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2021
- 2021-10-20 CN CN202122526465.9U patent/CN216347907U/en active Active
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