CN214403691U - Inside and outside spraying of direct air cooling unit pipeline is carried vacuum apparatus jointly - Google Patents
Inside and outside spraying of direct air cooling unit pipeline is carried vacuum apparatus jointly Download PDFInfo
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- CN214403691U CN214403691U CN202022776580.7U CN202022776580U CN214403691U CN 214403691 U CN214403691 U CN 214403691U CN 202022776580 U CN202022776580 U CN 202022776580U CN 214403691 U CN214403691 U CN 214403691U
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- pipeline
- air cooling
- steam
- steam exhaust
- pipe
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- 238000001816 cooling Methods 0.000 title claims abstract description 85
- 238000005507 spraying Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000007921 spray Substances 0.000 claims description 17
- 239000012267 brine Substances 0.000 claims description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 7
- 238000010612 desalination reaction Methods 0.000 claims 2
- 150000003839 salts Chemical class 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000011033 desalting Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Abstract
The utility model discloses an inside and outside joint spraying vacuum extractor of direct air cooling unit pipeline, including the steam turbine, the steam turbine afterbody is equipped with the steam turbine low pressure jar, and steam exhaust device is connected to the steam turbine low pressure jar, and steam exhaust device divide into upper steam exhaust device and lower steam exhaust device through the baffle, and upper steam exhaust device passes through steam exhaust pipe and connects the air cooling island, is equipped with a plurality of pipeline atomizer in the steam exhaust pipeline, and pipeline atomizer passes through pipeline atomizer water supply pipe and connects except that the salt water pump, and except that the salt water pump is connected to the salt water pump, and steam exhaust pipeline passes through steam exhaust pipeline drain pipe and connects lower steam exhaust device. The utility model discloses a backpressure reducing device equipment is few, and the system is simple, and the maintenance cost is low, and the operation degree of difficulty is low, and the investment is little, can make full use of water resource, is fit for promoting and applies at direct air cooling power plant.
Description
Technical Field
The utility model belongs to the technical field of thermal power, a jointly spray vacuum extractor inside and outside direct air cooling unit pipeline is related to.
Background
The proportion of thermal power in the energy ratio is still the first place, while the proportion of air cooling units in the thermal power units is up to more than 20%, and the water-saving advantage enables the air cooling units to be widely constructed in arid water-deficient areas in the northwest of China and become electric energy pillars in the areas. The air cooling units are mainly divided into two types, namely direct air cooling and indirect air cooling. Both air cooling units eventually release heat to the air, and therefore, the air cooling units are severely affected by environmental conditions. The temperature change range of the whole year in the area of the direct air cooling unit is large, the direct air cooling unit is extremely cold in winter and high in summer, the operation condition is severe, the fluctuation range of the operation parameters of the unit is large, problems are easy to generate, and the operation and maintenance difficulty is large.
At present, the performance degradation phenomenon of the cold end of a steam turbine unit adopting a direct air cooling system generally exists, particularly in summer, the unit often limits load promotion due to the fact that fine processing overtemperature operation is caused by overhigh back pressure, and the load limitation not only reduces the income of a power plant, but also enables the unit to face the risk of power grid examination. The existing method for improving the performance of the direct air cooling cold end mainly comprises the modes of increasing a peak cooling system, expanding the capacity of an air cooling island, increasing a peak condenser by utilizing the cooling allowance of an auxiliary machine and the like, the modes are huge in cost consumption, long in cost recovery period and low in economic benefit, especially the modes need enough fields for placing corresponding equipment and systems, and the methods are not optimal for general air cooling power plants.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an inside and outside combination spraying of direct air cooling unit pipeline carries vacuum apparatus, the equipment that the reduction back pressure that has solved existence among the prior art needs is complicated, problem with high costs.
The utility model provides a technical scheme who adopts is, a vacuum device is carried to inside and outside joint spraying of direct air cooling unit pipeline, including the steam turbine, the steam turbine afterbody is equipped with the steam turbine low pressure jar, and steam exhaust device is connected to the steam turbine low pressure jar, and steam exhaust device divide into steam exhaust device and lower steam exhaust device through the baffle, goes up steam exhaust device and passes through steam exhaust pipe connection air cooling island, is equipped with a plurality of pipeline atomizer in the steam exhaust pipeline, and pipeline atomizer passes through pipeline atomizer water supply pipe and connects the brine removal pump, and the brine removal pump is connected the brine removal case, and steam exhaust pipeline passes through steam exhaust pipeline drain pipe and connects lower steam exhaust device.
The utility model discloses a characteristics still lie in:
the air cooling island comprises a steam distribution pipe connected with a steam exhaust pipeline, the steam distribution pipe is connected with one ends of a plurality of pairs of radiators, the other ends of the radiators are connected with a condensed water pipe, and the condensed water pipe is connected with a lower steam exhaust device through a pipeline.
The lower steam exhaust device is connected with an air cooling island atomizing water pump through a pipeline, and the air cooling island atomizing water pump is connected with an air cooling island atomizing nozzle positioned below each pair of radiators through a pipeline.
A stop valve is arranged between the desalting water pump and the pipeline atomizing nozzle.
A flow meter is arranged between the desalting water pump and the pipeline atomizing nozzle.
The type and the number of the pipeline atomizing nozzles are the same as those of the air cooling island atomizing nozzles.
And the pipelines at two sides of the air cooling island atomizing water pump are respectively provided with a stop valve.
The utility model has the advantages that: the utility model relates to an inside and outside combination spraying vacuum extractor of direct air cooling unit pipeline passes through the dilatation of air cooling island, and it is little to utilize transformation systems such as auxiliary engine cooling surplus increase peak condenser to provide one set of investment for the power plant, and the water consumption is low, and area is little direct air cooling system cold junction optimizing system can effectively reduce the unit backpressure, improves the unit area load capacity, reduces electric wire netting examination pressure, improves the economic nature of whole factory.
Drawings
Fig. 1 is a schematic structural view of the inside and outside combined spray vacuum extractor of the pipeline of the direct air cooling unit of the present invention;
fig. 2 is a schematic view of a three-dimensional structure of a hollow cooling island of the internal and external combined spray vacuum extractor of the pipeline of the direct air cooling unit.
In the figure, 1, a low-pressure cylinder of a steam turbine, 2, a steam exhaust device, 3, a steam exhaust pipeline, 4, a pipeline atomizing nozzle, 5, a demineralized water pump, 6, a demineralized water tank, 7, a steam exhaust pipeline drain pipe, 8, a steam distribution pipe, 9, a radiator, 10, a condensed water pipe, 11, an air cooling island atomizing water pump, 12, an air cooling island atomizing nozzle and 13, an air cooling fan.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a direct air cooling unit pipeline internal and external combined spraying vacuum-pumping device, as shown in figure 1, including the steam turbine, the steam turbine afterbody is equipped with steam turbine low pressure cylinder 1, steam turbine low pressure cylinder 1 connects exhaust apparatus 2, exhaust apparatus 2 divide into upper steam discharging device and lower steam discharging device through the baffle, upper steam discharging device connects the air cooling island through exhaust pipe 3, be equipped with a plurality of pipeline atomizer 4 in the exhaust pipe 3 middle section, pipeline atomizer 4 connects except that salt water pump 5 through pipeline atomizer water supply pipe, be equipped with stop valve and flowmeter on pipeline atomizer 4 water supply pipe, except that salt water pump 5 connects except that salt water tank 6, exhaust pipe 3 connects lower steam discharging device through exhaust pipe drain pipe 7;
the air cooling island comprises a steam distribution pipe 8 connected with the steam exhaust pipeline 3, the steam distribution pipe 8 is connected with one ends of a plurality of pairs of radiators 9, the other ends of the radiators 9 are connected with condensate pipes 10, each pair of radiators 9 downwards form an included angle smaller than 180 degrees, the condensate pipes 10 are connected with a lower steam exhaust device through pipelines, the steam distribution pipe 8 is respectively communicated with each pair of radiators 9, and each radiator 9 is communicated with the condensate pipe 10 at the bottom of the radiator;
the lower steam exhaust device is connected with an air cooling island atomizing water pump 11 through a pipeline, the water pump ensures that the water pressure at the outlet of an air cooling island atomizing spray head 12 reaches more than 1MPa, the air cooling island atomizing water pump 11 is connected with the air cooling island atomizing spray heads 12 positioned below each pair of radiators 9 through pipelines, the pipeline is connected with each air cooling island atomizing spray head 12 through a water supply pipeline, each water supply pipeline is provided with a stop valve, the pipelines at two sides of the air cooling island atomizing water pump 11 are provided with stop valves, and an air cooling fan 13 is further arranged below the air cooling island atomizing spray heads 12;
the type and the number of the pipeline atomizer 4 and the air cooling island atomizer 12 are the same, so that the system water is prevented from silting up, and long-term operation is facilitated;
the utility model relates to an effect of main part is respectively among the inside and outside combination spraying vacuum extractor of direct air cooling unit pipeline:
1. the pipeline atomization nozzle water supply pipeline penetrates through the wall of the steam exhaust pipeline to be connected with the demineralized water pump, and the wall of the steam exhaust pipeline needs to be strictly sealed by using a sealing material, so that the negative pressure in the steam exhaust pipeline prevents vacuum leakage, so that excessive condensed gas of the system is avoided, and the heat exchange effect is influenced;
2. the purpose of arranging a plurality of pipeline atomizing nozzles in the middle section of the steam exhaust pipeline is that the middle section is positioned at a low position, if water in the nozzles cannot be completely atomized and is condensed into water drops, the water drops can be directly discharged from a low point to a lower steam exhaust device through a steam exhaust pipeline drain pipe, and the operation of a subsequent system is not influenced;
3. the air cooling island atomizing water pump is arranged to be used for returning steam turbine exhaust steam to the lower steam discharging device in a liquid state after the steam turbine exhaust steam is condensed into the liquid state through heat dissipation in the air cooling island, the liquid level of the lower steam discharging device is increased due to the water amount of an atomizing nozzle in a pipeline, and redundant water needs to be discharged out of the system, so that the air cooling island atomizing water pump is arranged to pump the redundant water in the lower steam discharging device to the bottom of each pair of radiators in the air cooling island and the area of an air outlet of an air cooling fan, the water is changed into an easily-evaporated form through the atomizing nozzle, the heat is evaporated and absorbed at the outer side of the air cooling island radiators, the temperature of air dry balls is reduced, and the heat dissipation capacity of the air cooling island radiators is improved;
the utility model relates to a vacuum device is carried in inside and outside joint spraying of direct air cooling unit pipeline, its working process as follows: the steam turbine low pressure cylinder exhausts steam to the upper steam exhaust device, when the exhaust steam passes through the middle section of the exhaust pipeline, demineralized water in the demineralized water tank is pumped by a demineralized water pump and is supplied to a pipeline atomizing spray head through a pipeline atomizing spray head, the demineralized water is atomized, part of the atomized demineralized water is evaporated to absorb the heat of the exhaust steam and then enters the air cooling island along with the exhaust steam, part of the atomized demineralized water still flows back to the steam exhaust device through a drain pipe of the steam exhaust pipeline, the liquid in the lower steam exhaust device passes through an air cooling island atomizing water pump to an air cooling island atomizing spray head arranged between each pair of radiator and the air cooling fan, the liquid is evaporated after atomization, the environmental heat is absorbed, the temperature of an environmental dry bulb is reduced, and part of the water is not recycled.
Examples
By taking a 300 MW-level direct air cooling unit as an example, calculation is carried out, when the water spraying temperature in the exhaust pipeline is 35 ℃, the back pressure is 25kPa, and the environmental temperature is 35 ℃, the water spraying in the exhaust pipeline can reduce the back pressure by about 4 kPa; and the air side water spray of the air cooling island can reduce the ambient temperature by about 3.5 ℃, and the back pressure can be reduced by about 4kPa by looking up the performance curve of the air cooling island. In conclusion, the system can reduce the backpressure of the 300 MW-level air cooling unit by about 8kPa, the effect is obvious, the full load of the unit can be ensured under the condition of not overtemperature during fine treatment in summer, the operating pressure of a power plant is greatly reduced, and the condition that the unit is checked by a power grid due to insufficient load is avoided.
The utility model relates to a vacuum device is carried in inside and outside joint spraying of direct air cooling unit pipeline, its beneficial effect lies in: the cold end optimization device of the direct air cooling system is small in investment, water consumption and occupied area, can effectively reduce the back pressure of the unit, improves the on-load capacity of the unit, reduces the examination pressure of a power grid, and improves the economy of the whole plant.
Claims (7)
1. The utility model provides an inside and outside combination spraying of direct air cooling unit pipeline carries vacuum apparatus, a serial communication port, including the steam turbine, the steam turbine afterbody is equipped with steam turbine low pressure jar (1), steam extraction device (2) are connected in steam turbine low pressure jar (1), steam extraction device (2) divide into steam extraction device and lower steam extraction device through the baffle, go up steam extraction device and connect the air cooling island through exhaust pipe (3), be equipped with a plurality of pipeline atomizer (4) in exhaust pipe (3), pipeline atomizer (4) are connected except that brine pump (5) through pipeline atomizer water supply pipe, except that brine pump (5) are connected and are removed brine tank (6), steam extraction pipe (3) are connected down steam extraction device through exhaust pipe drain pipe (7).
2. The internal and external combined spray vacuum extractor of the direct air cooling unit pipeline according to claim 1, wherein the air cooling island comprises a steam distribution pipe (8) connected with the steam exhaust pipeline (3), the steam distribution pipe (8) is connected with one end of a plurality of pairs of radiators (9), the other end of the radiators (9) is connected with a condensed water pipe (10), and the condensed water pipe (10) is connected with a lower steam exhaust device through a pipeline.
3. The combined spray vacuum-pumping device inside and outside the pipeline of the direct air cooling unit according to claim 2, characterized in that the lower steam exhaust device is connected with an air cooling island atomizing water pump (11) through a pipeline, and the air cooling island atomizing water pump (11) is connected with an air cooling island atomizing nozzle (12) positioned below each pair of radiators (9) through a pipeline.
4. The combined spray vacuum extractor inside and outside the pipeline of the direct air cooling unit according to claim 1, wherein a stop valve is arranged between the desalination water pump (5) and the pipeline atomizing nozzle (4).
5. The combined spray vacuum extractor inside and outside the pipeline of the direct air cooling unit as claimed in claim 1, wherein a flow meter is provided between the desalination water pump (5) and the pipeline atomizing nozzle (4).
6. The internal and external combined spray vacuum extractor of the direct air cooling unit pipeline according to claim 1, characterized in that the type and the number of the pipeline atomizer (4) and the air cooling island atomizer (12) are the same.
7. The internal and external combined spray vacuum extractor of the direct air cooling unit pipeline according to claim 3, characterized in that the pipelines at both sides of the air cooling island atomizing water pump (11) are provided with stop valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776580.7U CN214403691U (en) | 2020-11-26 | 2020-11-26 | Inside and outside spraying of direct air cooling unit pipeline is carried vacuum apparatus jointly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776580.7U CN214403691U (en) | 2020-11-26 | 2020-11-26 | Inside and outside spraying of direct air cooling unit pipeline is carried vacuum apparatus jointly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214403691U true CN214403691U (en) | 2021-10-15 |
Family
ID=78036414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022776580.7U Expired - Fee Related CN214403691U (en) | 2020-11-26 | 2020-11-26 | Inside and outside spraying of direct air cooling unit pipeline is carried vacuum apparatus jointly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214403691U (en) |
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2020
- 2020-11-26 CN CN202022776580.7U patent/CN214403691U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |