CN105953211A - Steam turbine and boiler united regenerative system and method - Google Patents
Steam turbine and boiler united regenerative system and method Download PDFInfo
- Publication number
- CN105953211A CN105953211A CN201610462845.1A CN201610462845A CN105953211A CN 105953211 A CN105953211 A CN 105953211A CN 201610462845 A CN201610462845 A CN 201610462845A CN 105953211 A CN105953211 A CN 105953211A
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- CN
- China
- Prior art keywords
- boiler
- air
- flue gas
- steam turbine
- feedwater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
Abstract
The invention discloses a steam turbine and boiler united regenerative system and method. The steam turbine and boiler united regenerative system comprises a boiler, wherein the boiler has a flue gas channel which can output flue gas and an air channel which can input air; a plurality of flue gas heat exchangers are arranged on the flue gas channel; a plurality of air heat exchangers are arranged on the air channel; the boiler is further connected with a water supply channel; all levels of regenerative heaters, including a low pressure heater, an oxygen extractor and a high pressure heater, are arranged on the water supply channel; the plurality of flue gas heat exchangers on the flue gas channel communicate with a water distribution channel; and the water distribution channel communicates with the plurality of air heat exchangers on the air channel. According to the steam turbine and boiler united regenerative system, the flue gas with different temperature levels is used for heating supplied water with proper temperature levels, and the supplied water with different temperature levels is used for gradually heating air, so that the reasonable and gradient utilization of energy is achieved, parameters are comprehensively matched and optimized, and the cycle economy of a whole plant is improved; and the steam turbine and boiler united regenerative system can replace heat exchange devices such as an air heater and a low-pressure economizer, and the system arrangement is simplified.
Description
[technical field]
The invention belongs to field of thermal power, be specifically related to a kind of steam turbine and unified boiler heat regenerative system and method.
[background technology]
The thermodynamic cycle in thermal power plant uses the Rankine cycle with backheat with the water vapour of thermal process again.Wherein heat regenerative system realizes
Feedwater stepped heating, to improve the economy of steam turbine thermodynamic cycle.And boiler side uses economizer, air preheater, steam air heater
Deng to the heater of different temperatures grade, gas energy is utilized, and realize the stepped heating of air.Have been developed that at present
Some technology heat the air of boiler side and the UTILIZATION OF VESIDUAL HEAT IN of flue gas is optimized, and achieve certain energy-saving effect.But, with
The accurate match of temperature at different levels is compared by Steam Turbine Regenerative System, the air of boiler side, the utilization to energy figure of the flue gas heat exchange process
Still there are optimization potentiality, thus there is certain energy saving space.
[summary of the invention]
It is an object of the invention to overcome above-mentioned deficiency, it is provided that steam turbine and unified boiler heat regenerative system and method, it is simple to boiler side
Fume afterheat and the heating process to air carry out level-density parameter optimization, thus improve the economy of whole thermodynamic cycle.
In order to achieve the above object, steam turbine and unified boiler heat regenerative system, including boiler, boiler has the cigarette that can export flue gas
Gas passage and can the air duct of input air, exhaust gases passes is provided with some flue gas heat-exchange units, if being provided with on air duct
Dry air heat exchanger, boiler is also associated with to aquaporin, to arranging bleeder heater at different levels on aquaporin, comprise low-pressure heater,
Oxygen-eliminating device and high-pressure heater, some flue gas heat-exchange units of exhaust gases passes are connected with water distribution passage, on water distribution passage and air duct
Some air heat exchangers connection.
Described connected with some flue gas heat-exchange units by water distribution system to aquaporin.
Described connected with some air heat exchangers by water distribution system to aquaporin.
Described low-pressure heater is arranged on the front end of water supply system, and high-pressure heater is arranged on the rear end of water supply system, and oxygen-eliminating device is arranged
Between low-pressure heater and high-pressure heater.
Steam turbine and the method for unified boiler backheat, comprise the following steps:
Step one, the high-temperature flue gas that boiler produces is discharged by exhaust gases passes；
Step 2, the feedwater of water distribution passage is heated by high-temperature flue gas by the flue gas heat-exchange unit of exhaust gases passes；
Step 3, air heated by the feedwater of water distribution passage by the air heat exchanger of air duct, thus reach steam turbine with
The function of unified boiler backheat.
In described step 2, feedwater is by being allocated to the water distribution system between aquaporin and exhaust gases passes, by temperature and flow
Measuring, in making each feedwater match exhaust gases passes, feedwater is heated by corresponding position, and high-temperature flue gas adds from high temperature to low temperature successively
Feedwater in hot water distribution passage, the order of heating is contrary with to the water (flow) direction in aquaporin.
In described step 3, feedwater is by being allocated to the water distribution system between aquaporin and air duct, by temperature and flow
Measuring, in making each feedwater match air duct, air is heated by corresponding position.
Compared with prior art, the present invention utilizes the feedwater of the flue gas proper temperature grade of different temperatures grade, and utilizes difference
The feedwater stepped heating air of temperature grade, it is achieved energy reasonable graduation utilizes, and completes the comprehensive matching optimization of parameter, improves full factory and follow
Ring economy, the heat transmission equipment such as the alternative steam air heater of the present invention, low-pressure coal saver, simplified system is arranged.
Further, the present invention realizes the reasonable distribution feedwater flow by air and flue system and temperature by water distribution system.
[accompanying drawing explanation]
Fig. 1 is the system construction drawing of invention.
[detailed description of the invention]
Below in conjunction with the accompanying drawings invention is described further.
Seeing Fig. 1, steam turbine and unified boiler heat regenerative system include that boiler 1, boiler 1 have the exhaust gases passes that can export flue gas
2 and can the air duct 3 of input air, exhaust gases passes 2 is provided with some flue gas heat-exchange units 4, air duct 3 is arranged
Having some air heat exchangers 5, boiler 1 is also associated with, to aquaporin 6, to arranging bleeder heater at different levels on aquaporin 6, comprising
Low-pressure heater 7, oxygen-eliminating device 8 and high-pressure heater 9, some flue gas heat-exchange units 4 of exhaust gases passes 2 are connected with water distribution passage 10
Logical, water distribution passage 10 connects with the some air heat exchangers 5 on air duct 3, if to aquaporin 6 by water distribution system 10 and
Dry flue gas heat exchanger 4 connects, and is connected with some air heat exchangers 5 by water distribution system 10 to aquaporin 6, low-pressure heater 7
Being arranged on the front end of water supply system, high-pressure heater 9 is arranged on the rear end of water supply system, and oxygen-eliminating device 8 is arranged on low-pressure heater 7
And between high-pressure heater 9.
Steam turbine and the method for unified boiler backheat, comprise the following steps:
Step one, the high-temperature flue gas that boiler 1 produces is discharged by exhaust gases passes 2；
Step 2, the feedwater of water distribution passage 10 is heated by high-temperature flue gas by the flue gas heat-exchange unit 4 of exhaust gases passes 2, feedwater
By being allocated to the water distribution system 10 between aquaporin 6 and exhaust gases passes 4, by temperature and the measurement of flow, make each feedwater
In matching exhaust gases passes, feedwater is heated by corresponding position, and high-temperature flue gas heats water distribution passage 10 from high temperature to low temperature successively
In feedwater, the order of heating is contrary with to the water (flow) direction in aquaporin 6；
Step 3, air heated by the feedwater of water distribution passage 10 by the air heat exchanger 5 of air duct 3, and feedwater is passed through
It is allocated to the water distribution system 10 between aquaporin 6 and air duct 3, by temperature and the measurement of flow, makes each feedwater coupling
In air duct, feedwater is heated by corresponding position, thus reaches the function of steam turbine and unified boiler backheat.
The water distribution system related in technological process is the combination of a series of valve and pipeline, and by temperature, flow measurement, it is achieved stream
In journey, each equipment feed temperature and flow mates.
Claims (7)
1. steam turbine and unified boiler heat regenerative system, it is characterised in that including boiler (1), boiler (1) has can export cigarette
The exhaust gases passes (2) of gas and can the air duct (3) of input air, exhaust gases passes is provided with some flue gas heat-exchange units on (2)
(4), air duct (3) being provided with some air heat exchangers (5), boiler (1) is also associated with to aquaporin (6), feedwater
Passage arranges bleeder heater at different levels on (6), comprises low-pressure heater (7), oxygen-eliminating device (8) and high-pressure heater (9), cigarette
Some flue gas heat-exchange units (4) of gas passage (2) are connected with water distribution passage (10), water distribution passage (10) and air duct (3)
On some air heat exchangers (5) be connected.
Steam turbine the most according to claim 1 and unified boiler heat regenerative system, it is characterised in that described to aquaporin (6)
Connected with some flue gas heat-exchange units (4) by water distribution system (10).
Steam turbine the most according to claim 1 and unified boiler heat regenerative system, it is characterised in that described to aquaporin (6)
Connected with some air heat exchangers (5) by water distribution system (10).
Steam turbine the most according to claim 1 and unified boiler heat regenerative system, it is characterised in that described low-pressure heater (7)
Being arranged on the front end of water supply system, high-pressure heater (9) is arranged on the rear end of water supply system, and oxygen-eliminating device (8) is arranged on low pressure and adds
Between hot device (7) and high-pressure heater (9).
5. steam turbine and the method for unified boiler backheat, it is characterised in that comprise the following steps:
Step one, the high-temperature flue gas that boiler (1) produces is discharged by exhaust gases passes (2)；
Step 2, the feedwater of water distribution passage (10) is added by high-temperature flue gas by the flue gas heat-exchange unit (4) of exhaust gases passes (2)
Heat；
Step 3, air heated by the feedwater of water distribution passage (10) by the air heat exchanger (5) of air duct (3),
Thus reach the function of steam turbine and unified boiler backheat.
Steam turbine the most according to claim 5 and the method for unified boiler backheat, it is characterised in that in described step 2,
Feedwater is by being allocated to the water distribution system (10) between aquaporin (6) and exhaust gases passes (4), by temperature and the survey of flow
Amount, in making each feedwater match exhaust gases passes, feedwater is heated by corresponding position, and high-temperature flue gas heats from high temperature to low temperature successively
Feedwater in water distribution passage (10), the order of heating is contrary with to the water (flow) direction in aquaporin (6).
Steam turbine the most according to claim 5 and the method for unified boiler backheat, it is characterised in that in described step 3,
Feedwater is by being allocated to the water distribution system (10) between aquaporin (6) and air duct (3), by temperature and the survey of flow
Amount, in making each feedwater match air duct, air is heated by corresponding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462845.1A CN105953211A (en) | 2016-06-22 | 2016-06-22 | Steam turbine and boiler united regenerative system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462845.1A CN105953211A (en) | 2016-06-22 | 2016-06-22 | Steam turbine and boiler united regenerative system and method |
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| Publication Number | Publication Date |
|---|---|
| CN105953211A true CN105953211A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610462845.1A Pending CN105953211A (en) | 2016-06-22 | 2016-06-22 | Steam turbine and boiler united regenerative system and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11337009A (en) * | 1998-05-22 | 1999-12-10 | Mitsubishi Heavy Ind Ltd | Flash type deaerator |
| CN201606865U (en) * | 2010-01-22 | 2010-10-13 | 西安热工研究院有限公司 | Hydrophily type boiler smoke removal afterheat recycling device |
| CN202432505U (en) * | 2012-01-29 | 2012-09-12 | 河北省电力勘测设计研究院 | Flue gas waste heat recovery utilization system of coal burning boiler |
| CN105157010A (en) * | 2015-09-02 | 2015-12-16 | 上海理工大学 | Coal-fired power generation system based on bypass flue at tail part of boiler |
| CN205807385U (en) * | 2016-06-22 | 2016-12-14 | 西安热工研究院有限公司 | Steam turbine and unified boiler heat regenerative system |
-
2016
- 2016-06-22 CN CN201610462845.1A patent/CN105953211A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11337009A (en) * | 1998-05-22 | 1999-12-10 | Mitsubishi Heavy Ind Ltd | Flash type deaerator |
| CN201606865U (en) * | 2010-01-22 | 2010-10-13 | 西安热工研究院有限公司 | Hydrophily type boiler smoke removal afterheat recycling device |
| CN202432505U (en) * | 2012-01-29 | 2012-09-12 | 河北省电力勘测设计研究院 | Flue gas waste heat recovery utilization system of coal burning boiler |
| CN105157010A (en) * | 2015-09-02 | 2015-12-16 | 上海理工大学 | Coal-fired power generation system based on bypass flue at tail part of boiler |
| CN205807385U (en) * | 2016-06-22 | 2016-12-14 | 西安热工研究院有限公司 | Steam turbine and unified boiler heat regenerative system |
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Application publication date: 20160921 |
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