CN208419709U - A kind of steam turbine of thermal power plant afterheat utilizing system - Google Patents
A kind of steam turbine of thermal power plant afterheat utilizing system Download PDFInfo
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- CN208419709U CN208419709U CN201821020806.7U CN201821020806U CN208419709U CN 208419709 U CN208419709 U CN 208419709U CN 201821020806 U CN201821020806 U CN 201821020806U CN 208419709 U CN208419709 U CN 208419709U
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Abstract
The utility model discloses a kind of steam turbine of thermal power plant afterheat utilizing systems, it include: steam turbine, the first hydrophobic regulating device, the second hydrophobic regulating device, booster pump, it is sequentially communicated in the first afterheat heat exchanger of primary air fan and boiler, the first air preheater and coal pulverizer, is sequentially communicated in pressure fan and the second afterheat heat exchanger of boiler and the second air preheater；First afterheat heat exchanger cold source entrance and primary air fan outlet, the first afterheat heat exchanger waste heat thermal source inlet and exhaust steam in steam turbine outlet, the first afterheat heat exchanger waste heat thermal source outlet are connected to the first air preheater First air entrance；Second afterheat heat exchanger cold source entrance and pressure fan outlet, the second afterheat heat exchanger waste heat thermal source inlet and exhaust steam in steam turbine outlet, the second afterheat heat exchanger waste heat thermal source outlet are connected to the second air preheater Secondary Air entrance.Exhaust steam in steam turbine waste heat is used for heating boiler First air and Secondary Air by the utility model, realizes the effective use of exhaust steam in steam turbine waste heat.
Description
Technical field
The utility model belongs to Reheating System in Thermal Power Plant technical field more particularly to a kind of steam turbine of thermal power plant UTILIZATION OF VESIDUAL HEAT IN
System.
Background technique
Currently, the fire coal in boiler generates heat by being mixed and burned with First air and Secondary Air in thermal power plant,
Water supply is heated into high temperature and high pressure steam, high temperature and high pressure steam does work in steam turbine becomes steam exhaust after power generation, and steam exhaust is air-cooled
Condensed water is condensed into island, condensed water is pressurizeed by booster pump, and backheat is carried out in regenerator becomes water supply, and water supply is again introduced into
Boiler completes circulation.In above-mentioned power generation process, the heat of steam exhaust accounts for about 50% that water supply absorbs total amount of heat in the boiler, in order to
Maintain back pressure, it is necessary to fall these heat losses, and in the prior art, electric energy production is constantly consumed using the blower in Air-Cooling Island
A large amount of wind exchanges heat to enhance, and causes greatly energy dissipation.
And for boiler, the wind-warm syndrome of First air and Secondary Air is higher, and boiler efficiency is higher, the economy of entire unit
Performance is better.But in current power plant, First air and Secondary Air are directly derived from atmosphere, and wind-warm syndrome can only be with environment temperature
Degree variation, thus makes the economic performance of entire unit with seasonal fluctuation, cannot be effectively controlled.
Utility model content
In order to solve the above problem, the utility model provides a kind of steam turbine of thermal power plant afterheat utilizing system, realizes steamer
The effective use of machine exhaust steam residual heat improves boiler efficiency.
In order to achieve the above object, the utility model is resolved using following technical scheme.
A kind of steam turbine of thermal power plant afterheat utilizing system, comprising: be sequentially communicated the outlet in primary air fan and the combustion of boiler
The first afterheat heat exchanger, the first air preheater and coal pulverizer between coal entrance are sequentially communicated the outlet in pressure fan and boiler
The second afterheat heat exchanger and the second air preheater and steam turbine between combustion air inlet, the first hydrophobic regulating device, second
Hydrophobic regulating device and booster pump；The cold source entrance of first afterheat heat exchanger and the primary air fan outlet, it is described
The waste heat thermal source inlet of first afterheat heat exchanger is by the steam exhaust outlet of steam exhaust fairlead and the steam turbine, and described first
The waste heat thermal source outlet of afterheat heat exchanger is connected to the First air entrance of first air preheater, first afterheat heat exchanger
Cold source outlet is connected to the condensation water inlet of the described first hydrophobic regulating device, the First air outlet of first air preheater and institute
State the First air entrance connection of coal pulverizer；The cold source entrance of second afterheat heat exchanger and the outlet of the pressure fan,
The waste heat thermal source inlet of second afterheat heat exchanger passes through the steam exhaust outlet of steam exhaust fairlead and the steam turbine, described
The waste heat thermal source outlet of second afterheat heat exchanger is connected to the Secondary Air entrance of second air preheater, the second waste heat heat exchange
The cold source outlet of device is connected to the condensation water inlet of the described second hydrophobic regulating device；The condensation of the first hydrophobic regulating device
Water out and the condensation water out of the second hydrophobic regulating device are connected to the water inlet of the booster pump respectively, the pressurization
The water outlet of pump is connected to the admission port of the boiler.
Steam turbine of thermal power plant afterheat utilizing system according to the present utility model, primary air fan and pressure fan are respectively from atmosphere
Suck air and be used as First air and Secondary Air, and First air by primary air fan into the first afterheat heat exchanger, steam turbine it is weary
After vapour is exchanged heat in the first afterheat heat exchanger by steam exhaust fairlead into the first afterheat heat exchanger, First air and steam exhaust, once
Air temperature increases, and into the first air preheater, after the heating of the first air preheater, enters coal pulverizer with certain temperature, coal dust from
The coal-fired entrance of coal pulverizer enters, and First air carries coal dust and enters boiler, participates in burning, and after the heat exchange of the first afterheat heat exchanger
Steam exhaust be condensed into condensed water and enter pot as boiler feedwater then after booster pump pressurizes into the first hydrophobic regulating device
Furnace.Secondary Air enters the second afterheat heat exchanger by pressure fan, and the steam exhaust of steam turbine enters the second waste heat by steam exhaust fairlead
After heat exchanger, Secondary Air and steam exhaust heat exchange, into the second air preheater, after heating by the second air preheater, it is directly entered boiler ginseng
With burning, and the steam exhaust after the heat exchange of the second afterheat heat exchanger is condensed into condensed water into the second hydrophobic regulating device, then passes through
After booster pump pressurization, enter boiler as boiler feedwater.Wherein, the waste heat of steam exhaust passes through the first afterheat heat exchanger and the second waste heat
Heat exchanger transfer participates in burning after First air and the raising of Secondary Air temperature to First air and Secondary Air into boiler.This is practical new
Type is designed by structure, and the exhaust steam residual heat of steam turbine is used for heating boiler First air and Secondary Air, realizes exhaust steam in steam turbine
The effective use of waste heat improves steam turbine power and boiler efficiency, effectively increases the economic performance of thermal power plant.
In addition, steam turbine of thermal power plant afterheat utilizing system provided by the utility model can have following supplementary technology spy
Sign:
Preferably, the steam exhaust fairlead is also connected with Air-Cooling Island, the condensation water out of the Air-Cooling Island with it is described
The water inlet of booster pump is connected to.
Steam turbine of thermal power plant afterheat utilizing system according to the present utility model, steam exhaust fairlead are also connected with Air-Cooling Island, empty
The condensation water out of cool island is connected to the water inlet of booster pump, makes to enter the weary of the first afterheat heat exchanger and the second afterheat heat exchanger
Steam flow amount reduces, to guarantee in unit steam flow matches everywhere.
Preferably, the first hydrophobic regulating device and the second hydrophobic regulating device are respectively drain regulating valve
Or multilevel water seal.
Steam turbine of thermal power plant afterheat utilizing system according to the present utility model, the first hydrophobic regulating device and the second hydrophobic tune
Regulating device is respectively drain regulating valve or multilevel water seal, for adjusting hydrophobic flow to control the water level of afterheat heat exchanger, make into
Enter in the condensed water of drain regulating valve or multilevel water seal without vapour.
Preferably, being provided with valve on the steam exhaust fairlead.
Steam turbine of thermal power plant afterheat utilizing system according to the present utility model is provided with valve on the steam exhaust fairlead,
Allow system and adjusts the steam exhaust flow into two afterheat heat exchangers according to the heat demand of First air and Secondary Air.
Preferably, first air preheater is connected with temperature regulating device.
Preferably, the temperature regulating device is temperature control valve.
Steam turbine of thermal power plant afterheat utilizing system according to the present utility model, the first air preheater connect temperature control valve, make to enter
Air temperature of coal pulverizer is constant, guarantees that boiler thermal efficiency is stablized.
Detailed description of the invention
The utility model is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is a kind of structural schematic diagram of embodiment of the steam turbine of thermal power plant afterheat utilizing system of the utility model；
In Fig. 1: No. 1 machines；2 pressure fan；3 first afterheat heat exchangers；4 second afterheat heat exchangers；5 first air preheaters；
501 temperature regulating devices；6 second air preheaters；7 coal pulverizers；8 boilers；9 steam turbines；The 10 first hydrophobic tune of hydrophobic regulating device 11 second
Regulating device；12 booster pumps；13 Air-Cooling Islands；14 steam exhaust fairleads；1401 valves.
Specific embodiment
With reference to Fig. 1, the steam turbine of thermal power plant afterheat utilizing system of the utility model includes: to be sequentially communicated in primary air fan 1
Outlet and boiler 8 coal-fired entrance between the first afterheat heat exchanger 3, the first air preheater 5 and coal pulverizer 7, be sequentially communicated
The second afterheat heat exchanger 4 and the second air preheater 6 and steamer between the outlet of pressure fan 2 and the combustion air inlet of boiler 8
Machine 9, the first hydrophobic regulating device 10, the second hydrophobic regulating device 11 and booster pump 12；The cold source entrance of first afterheat heat exchanger 3
Pass through steam exhaust fairlead 14 and steam turbine 9 with the waste heat thermal source inlet of 1 outlet of primary air fan, the first afterheat heat exchanger 3
Steam exhaust outlet, the waste heat thermal source outlet of the first afterheat heat exchanger 3 are connected to the First air entrance of the first air preheater 5, and first
The cold source outlet of afterheat heat exchanger 3 is connected to the condensation water inlet of the first hydrophobic regulating device 10, the First air of the first air preheater 5
Outlet is connected to the First air entrance of coal pulverizer 7；The cold source entrance of second afterheat heat exchanger 4 and the outlet of pressure fan 2, the
The waste heat thermal source inlet of two afterheat heat exchangers 4 passes through the steam exhaust outlet of steam exhaust fairlead 14 and steam turbine 9, and the second waste heat changes
The waste heat thermal source outlet of hot device 4 is connected to the Secondary Air entrance of the second air preheater 6, the outlet of the cold source of the second afterheat heat exchanger 4 with
The condensation water inlet of second hydrophobic regulating device 11 is connected to；The condensation water out and the second hydrophobic tune of first hydrophobic regulating device 10
The condensation water out of regulating device 11 is connected to the water inlet of booster pump 12 respectively, the water supply of the water outlet and boiler 8 of booster pump 12
Mouth connection.
In the embodiment above, primary air fan 1 and pressure fan 2 suck air as First air and secondary from atmosphere respectively
Wind, and First air enters the first afterheat heat exchanger 3 by primary air fan 1, the steam exhaust of steam turbine 9 is entered by steam exhaust fairlead 14
After first afterheat heat exchanger 3, First air and steam exhaust exchange heat in the first afterheat heat exchanger 3, one time air temperature is increased, into first
Air preheater 5 enters coal pulverizer 7, coal-fired entrance of the coal dust from coal pulverizer 7 after the heating of the first air preheater 5 with certain temperature
Carry coal dust into, First air and enter boiler 8, participate in burning, and the steam exhaust after the heat exchange of the first afterheat heat exchanger 3 be condensed into it is solidifying
It bears water and enters the first hydrophobic regulating device 10, then after the pressurization of booster pump 12, enter boiler 8 as 8 water supply of boiler.Secondary Air
Enter the second afterheat heat exchanger 4 by pressure fan 2, the steam exhaust of steam turbine 9 enters the second waste heat by steam exhaust fairlead 14 and exchanges heat
After device 4, Secondary Air and steam exhaust heat exchange, into the second air preheater 6, after heating by the second air preheater 6, it is directly entered the ginseng of boiler 8
With burning, and into the second hydrophobic regulating device 11, then the steam exhaust after the heat exchange of the second afterheat heat exchanger 4 is condensed into condensed water
After the pressurization of booster pump 12, enter boiler 8 as 8 water supply of boiler.Wherein, the waste heat of steam exhaust passes through 3 He of the first afterheat heat exchanger
Second afterheat heat exchanger 4 passes to First air and Secondary Air, and First air and Secondary Air temperature enter boiler 8 after increasing and participate in combustion
It burns.The utility model is designed by structure, and the exhaust steam residual heat of steam turbine 9 is used for 8 First air of heating boiler and Secondary Air, is realized
The effective use of 9 exhaust steam residual heat of steam turbine improves 9 power of steam turbine and 8 efficiency of boiler, effectively increases the economy of thermal power plant
Performance.
In addition, steam turbine of thermal power plant afterheat utilizing system provided by the utility model can have following additional embodiment:
With reference to Fig. 1, one embodiment according to the present utility model, steam exhaust fairlead 14 is also connected with Air-Cooling Island 13, air-cooled
The condensation water out on island 13 is connected to the water inlet of booster pump 12.
In the embodiment above, steam exhaust fairlead 14 is also connected with Air-Cooling Island 13, the condensation water out of Air-Cooling Island 13 and increasing
The water inlet of press pump 12 is connected to, and reduces the steam exhaust flow for entering the first afterheat heat exchanger 3 and the second afterheat heat exchanger 4, to protect
Demonstrate,prove steam flow matches everywhere in unit.
With reference to Fig. 1, one embodiment according to the present utility model, the first hydrophobic regulating device 10 and the second hydrophobic adjusting are filled
Setting 11 is respectively drain regulating valve or multilevel water seal.
In the embodiment above, the first hydrophobic regulating device 10 and the second hydrophobic regulating device 11 are respectively drain regulating valve
Or multilevel water seal makes to enter drain regulating valve or multilevel water seal for adjusting hydrophobic flow to control the water level of afterheat heat exchanger
Condensed water in be free of vapour.
With reference to Fig. 1, one embodiment according to the present utility model is provided with valve 1401 on steam exhaust fairlead 14.
In the embodiment above, it is provided with valve 1401 on steam exhaust fairlead 14, allows system according to First air and two
The heat demand of secondary wind adjusts the steam exhaust flow into two afterheat heat exchangers.
With reference to Fig. 1, one embodiment according to the present utility model, the first air preheater 5 is connected with temperature regulating device 501.
With reference to Fig. 1, one embodiment according to the present utility model, temperature regulating device 501 is temperature control valve.
In the embodiment above, the first air preheater 5 connects temperature control valve, keeps an air temperature into coal pulverizer 7 constant, protects
8 thermal efficiency of boiler is demonstrate,proved to stablize.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the art
Novel spirit and scope.If in this way, these modification and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (6)
1. a kind of steam turbine of thermal power plant afterheat utilizing system characterized by comprising be sequentially communicated going out in primary air fan (1)
The first afterheat heat exchanger (3), the first air preheater (5) and coal pulverizer (7) between mouth and the coal-fired entrance of boiler (8), successively connect
Lead to the second afterheat heat exchanger (4) and the second air preheater between the outlet in pressure fan (2) and the combustion air inlet of boiler (8)
(6) and steam turbine (9), the first hydrophobic regulating device (10), the second hydrophobic regulating device (11) and booster pump (12)；
The cold source entrance and the primary air fan (1) outlet of first afterheat heat exchanger (3), the first waste heat heat exchange
The waste heat thermal source inlet of device (3) is by the steam exhaust outlets of steam exhaust fairlead (14) and the steam turbine (9), and described more than first
The waste heat thermal source outlet of heat exchanger (3) is connected to the First air entrance of first air preheater (5), the first waste heat heat exchange
The cold source outlet of device (3) is connected to the condensation water inlet of the described first hydrophobic regulating device (10), first air preheater (5)
First air outlet is connected to the First air entrance of the coal pulverizer (7)；
The cold source entrance of second afterheat heat exchanger (4) and the outlet of the pressure fan (2), the second waste heat heat exchange
The waste heat thermal source inlet of device (4) is by the steam exhaust outlets of steam exhaust fairlead (14) and the steam turbine (9), and described more than second
The waste heat thermal source outlet of heat exchanger (4) is connected to the Secondary Air entrance of second air preheater (6), the second waste heat heat exchange
The cold source outlet of device (4) is connected to the condensation water inlet of the described second hydrophobic regulating device (11)；
The condensation water out of the first hydrophobic regulating device (10) and the condensed water of the second hydrophobic regulating device (11) go out
Mouth is connected to the water inlet of the booster pump (12) respectively, the water outlet of the booster pump (12) and the water supply of the boiler (8)
Mouth connection.
2. steam turbine of thermal power plant (9) afterheat utilizing system according to claim 1, which is characterized in that the steam exhaust is drawn
Pipe (14) is also connected with Air-Cooling Island (13), and the condensation water out of the Air-Cooling Island (13) and the water inlet of the booster pump (12) connect
It is logical.
3. steam turbine of thermal power plant (9) afterheat utilizing system according to claim 1, which is characterized in that described first is hydrophobic
Regulating device (10) and the second hydrophobic regulating device (11) are respectively drain regulating valve or multilevel water seal.
4. steam turbine of thermal power plant (9) afterheat utilizing system according to claim 1, which is characterized in that the steam exhaust is drawn
Valve (1401) are provided on pipe (14).
5. steam turbine of thermal power plant (9) afterheat utilizing system according to claim 1, which is characterized in that described first is empty pre-
Device (5) is connected with temperature regulating device (501).
6. steam turbine of thermal power plant (9) afterheat utilizing system according to claim 5, which is characterized in that the temperature regulating device
It (501) is temperature control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821020806.7U CN208419709U (en) | 2018-06-29 | 2018-06-29 | A kind of steam turbine of thermal power plant afterheat utilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821020806.7U CN208419709U (en) | 2018-06-29 | 2018-06-29 | A kind of steam turbine of thermal power plant afterheat utilizing system |
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| Publication Number | Publication Date |
|---|---|
| CN208419709U true CN208419709U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821020806.7U Expired - Fee Related CN208419709U (en) | 2018-06-29 | 2018-06-29 | A kind of steam turbine of thermal power plant afterheat utilizing system |
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| CN (1) | CN208419709U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140870A (en) * | 2020-01-17 | 2020-05-12 | 中国电力工程顾问集团西北电力设计院有限公司 | Low-quality heat utilization system of machine furnace |
| CN113074408A (en) * | 2021-05-14 | 2021-07-06 | 西安热工研究院有限公司 | Air system and method for loss application of cold end of air cooling unit |
-
2018
- 2018-06-29 CN CN201821020806.7U patent/CN208419709U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140870A (en) * | 2020-01-17 | 2020-05-12 | 中国电力工程顾问集团西北电力设计院有限公司 | Low-quality heat utilization system of machine furnace |
| CN113074408A (en) * | 2021-05-14 | 2021-07-06 | 西安热工研究院有限公司 | Air system and method for loss application of cold end of air cooling unit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20190122 Termination date: 20190629 |