CN210799058U - Steam-water double-pressure waste heat power generation system - Google Patents
Steam-water double-pressure waste heat power generation system Download PDFInfo
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- CN210799058U CN210799058U CN201921334640.0U CN201921334640U CN210799058U CN 210799058 U CN210799058 U CN 210799058U CN 201921334640 U CN201921334640 U CN 201921334640U CN 210799058 U CN210799058 U CN 210799058U
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Abstract
A steam-water double-pressure waste heat power generation system is characterized in that a first generator is connected with a steam turbine, high-pressure steam flows into the steam turbine to do work, is converted into hot water in a steam condenser and flows into a hot water tank; the second generator is connected with an expander, the expander is connected with an evaporator, a preheater, an organic working medium condenser and an organic working medium pump, the evaporator is further connected with a steam-water dual-pressure waste heat boiler, the preheater is further connected with a hot water tank, heat exchange is carried out in the evaporator through organic working medium and low-pressure hot water, the organic working medium steam flows into the expander to do work, the organic working medium steam after doing work is converted into organic working medium liquid through the organic working medium condenser, the hot water tank is connected with the steam-water dual-pressure waste heat boiler, the steam-water dual-pressure waste heat boiler is further connected with a deaerator, the deaerator is respectively connected with the steam-water dual-pressure waste heat boiler through a third water pump and a fourth water pump, and hot water in the deaerator can flow back to the steam-water dual-pressure waste heat boiler and.
Description
Technical Field
The utility model relates to a cogeneration system field especially relates to a two pressure cogeneration system of soda.
Background
The steam-water dual-pressure waste heat boiler has wide application in the industrial flue gas waste heat utilization technology, high-pressure steam and low-pressure hot water can be simultaneously arranged in the steam-water dual-pressure waste heat boiler, but the high-efficiency use of the high-pressure steam and the low-pressure hot water is difficult to simultaneously carry out in the single-pressure waste heat power generation technology, the flash evaporation waste heat power generation technology and the dual-pressure waste heat power generation technology which are widely adopted at present. In the single-pressure waste heat power generation technology, due to the limitation of single pressure, the exhaust gas temperature of the waste heat boiler is higher, and waste heat resources in the exhaust gas cannot be fully utilized; the flash evaporation waste heat power generation technology utilizes high-pressure hot water to obtain low-pressure saturated steam through the decompression flash tank, and the steam turbine is mended to generate electricity, and a large amount of saturated steam are mended and are required the steam turbine to increase suddenly in the through flow area behind the steam supplementing point, and this causes the loss of steam turbine increase efficiency to reduce, and here while the hot-water pump circulation volume is big, and the pump lift is high, and power consumption is big. According to the double-pressure waste heat power generation technology, the main steam pressure is limited by multiple factors of narrow-point temperature difference, outlet temperature and low-pressure steam supplement quantity, the main steam pressure is generally selected to be 1.6Mpa and cannot be further improved, the efficiency of a steam turbine is improved by limitation, and therefore the generated energy is influenced to a certain degree. In summary, in the prior art, it is difficult to simultaneously and efficiently utilize the heat of high-pressure steam and low-pressure hot water in the steam-water dual-pressure waste heat boiler, so that the heat in the steam-water dual-pressure waste heat boiler is wasted, and the utilization rate of waste heat energy is reduced.
SUMMERY OF THE UTILITY MODEL
For solving the problem that be difficult to carry out high-efficient utilization simultaneously to high-pressure steam and the hydrothermal heat of low pressure among the two pressure exhaust-heat boiler of soda, the utility model provides a two pressure exhaust-heat power generation systems of soda.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a steam-water dual-pressure waste heat power generation system utilizes high-pressure steam and low-pressure hot water in a steam-water dual-pressure waste heat boiler to respectively drive a first generator and a second generator to generate power, wherein a steam turbine is connected to the first generator, the steam turbine is connected with the steam-water dual-pressure waste heat boiler through a high-pressure steam pipeline, so that the high-pressure steam flows into the steam turbine to do work, a steam condenser, a first water pump and a hot water tank are sequentially connected to an outlet of the steam turbine, and the steam after the work is converted into the hot water in the steam condenser and flows into the hot water tank;
the second generator is connected with an expander, the expander is connected with an organic circulating pipeline for the organic working medium to circularly flow, the organic circulating pipeline is connected with an evaporator, a preheater, an organic working medium condenser and an organic working medium pump, the evaporator is also connected with a steam-water double-pressure waste heat boiler, and the preheater is also connected with a hot water tank, so that low-pressure hot water and the organic working medium in the evaporator and the preheater sequentially exchange heat and then flow into the hot water tank; the organic working medium steam flows into an expansion machine to do expansion work by exchanging heat in an evaporator through an organic working medium and low-pressure hot water, the organic working medium steam flowing out of the expansion machine is cooled through an organic working medium condenser, the organic working medium steam after expansion work is converted into organic working medium liquid, heat exchange is carried out in a preheater through the organic working medium liquid and the low-pressure hot water, and the preheated organic working medium flows back into the evaporator so as to realize the cyclic evaporation work of the organic working medium;
the hot water tank is connected with the steam-water double-pressure waste heat boiler through the second water pump, the steam-water double-pressure waste heat boiler is further connected with the deaerator, hot water in the hot water tank enters the steam-water double-pressure waste heat boiler to be preheated and then flows into the deaerator, an outlet of the deaerator is connected with the steam-water double-pressure waste heat boiler through the third water pump and the fourth water pump respectively, the hot water in the deaerator can flow back to the steam-water double-pressure waste heat boiler and is converted into high-pressure steam and low-pressure hot water respectively, and therefore cyclic utilization of the high-pressure steam and the low-pressure.
Preferably, the steam condenser and the organic working medium condenser are connected with cooling pipelines, the cooling pipelines are connected with a cooling tower for providing cooling media for the cooling pipelines, and the cooling pipelines are further connected with a fifth water pump.
Preferably, the organic working medium is pentafluoropropane.
Preferably, the deaerator is connected with a water jet air ejector, the water jet air ejector is connected with the water tank through a water return pipe, and the water return pipe is connected with a sixth water pump, so that water flow in the water tank enters the water jet air ejector and is returned to the water tank after being flushed out along with gas in the deaerator by the water jet air ejector.
Preferably, the top of the deaerator is connected with a water ring vacuum pump.
Preferably, the steam-water dual-pressure waste heat boiler is connected with the steam drum, so that hot water in the steam-water dual-pressure waste heat boiler can flow into the steam drum, is converted into high-pressure steam in the steam drum, and then flows back to the steam-water dual-pressure waste heat boiler.
Preferably, a steam seal heater is connected between the first water pump and the hot water tank.
According to the technical scheme, the beneficial effects of the utility model are that:
the utility model makes the high pressure steam in the steam-water dual-pressure waste heat boiler flow into the steam turbine to do work, and the steam after doing work is converted into hot water through the steam condenser and flows into the hot water tank; the low-pressure hot water flows into the evaporator and the preheater and exchanges heat with the organic working medium in the evaporator and the preheater, so that the organic working medium is heated and converted into steam and enters the expansion machine to do work, the steam turbine and the expansion machine can respectively drive the generator to generate electricity, and the low-pressure hot water after heat exchange also flows into the hot water tank; the hot water in the hot water tank flows back to the steam-water dual-pressure waste heat boiler to be preheated, and then flows back to the steam-water dual-pressure waste heat boiler again after being deoxidized by the deaerator and is respectively converted into high-pressure steam and low-pressure hot water, so that the high-pressure steam and the low-pressure hot water can be recycled, the heat in the steam-water dual-pressure waste heat boiler can be efficiently utilized, and compared with the existing single-pressure waste heat power generation system, the utility model discloses can reduce the exhaust gas temperature of the boiler; compared with the prior flash evaporation waste heat utilization technology, the utility model can reduce the steam humidity of the last stage of the steam turbine, greatly improve the safety of the steam turbine and prolong the service life of the steam turbine; compared with the existing double-pressure waste heat power generation technology, the utility model can improve the main steam parameters of the boiler without being limited by the optimal temperature and pressure, thereby improving the initial parameters of the steam turbine, improving the efficiency of the steam turbine, reducing the volume of the steam turbine, reducing the civil engineering cost and enhancing the flexibility of the system; to sum up, the utility model discloses a carry out high-efficient utilization simultaneously to high-pressure steam and the hydrothermal heat of low pressure in the two pressure exhaust-heat boilers of soda, promoted the utilization ratio to the surplus heat energy among the two pressure exhaust-heat boilers of soda.
Drawings
Fig. 1 is a schematic view of the present invention.
The labels in the figure are: 1. steam-water double-pressure waste heat boiler, 2, a steam drum, 3, a steam turbine, 4, a first generator, 5, a steam condenser, 6, a first water pump, 7, a steam seal heater, 8, a hot water tank, 9, a second water pump, 10, a deaerator, 11, a fourth water pump, 12, a third water pump, 13, an expander, 14, a second generator, 15, an organic working medium condenser, 16, an organic working medium pump, 17, a preheater, 18, an evaporator, 19, a cooling tower, 20 and a fifth water pump.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
the utility model provides a two pressure exhaust-heat power generation systems of soda, utilizes the two pressure exhaust-heat boiler 1 of soda to drive first generator 4 and second generator 14 respectively and generate electricity with low pressure hot water, be connected with steam turbine 3 on the first generator 4, steam turbine 3 is connected with two pressure exhaust-heat boiler 1 of soda through the high pressure steam pipeline, makes high pressure steam flow into and does work in steam turbine 3, has connected gradually steam condenser 5, first water pump 6 and hot-water tank 8 on the steam turbine 3 export, makes the steam after the work convert hot water and flow into hot-water tank 8 in steam condenser 5, still is connected with gland sealing heater 7 between first water pump 6 and the hot-water tank 8, can utilize the heat after doing work to steam turbine 3 through gland sealing heater 7.
The second generator 14 is connected with an expander 13, the expander 13 is connected with an organic circulating pipeline for the organic working medium to circularly flow, the organic circulating pipeline is connected with an evaporator 18, a preheater 17, an organic working medium condenser 15 and an organic working medium pump 16, in the embodiment, the organic working medium adopts pentafluoropropane, the evaporator 18 is also connected with the steam-water dual-pressure waste heat boiler 1, the preheater 17 is also connected with the hot water tank 8, so that low-pressure hot water and the organic working medium in the evaporator 18 and the preheater 17 sequentially exchange heat and then flow into the hot water tank 8; the organic working medium steam flows into the expansion machine 13 to do expansion work by exchanging heat in the evaporator 18 through the organic working medium and the low-pressure hot water, the steam condenser 5 and the organic working medium condenser 15 are connected with cooling pipelines which are connected with a cooling tower 19 used for providing cooling medium for the cooling pipelines, the cooling pipelines are also connected with a fifth water pump 20, the organic working medium steam flowing out of the expansion machine 13 is cooled through the organic working medium condenser 15, the organic working medium steam after expansion work is converted into organic working medium liquid, heat exchange is carried out in the preheater 17 through the organic working medium liquid and the low-pressure hot water, and the preheated organic working medium flows back into the evaporator 18 to realize the cyclic evaporation work of the organic working medium.
The hot water tank 8 is connected with the double-steam-water-pressure waste heat boiler 1 through the second water pump 9, the double-steam-water-pressure waste heat boiler 1 is further connected with the deaerator 10, hot water in the hot water tank 8 enters the double-steam-water-pressure waste heat boiler 1 to be preheated and then flows into the deaerator 10, the deaerator 10 is connected with the water jet air extractor, the water jet air extractor is connected with the water tank through a water return pipe, a sixth water pump is connected onto the water return pipe, water flow in the water tank enters the water jet air extractor, the water jet air extractor returns to the water tank along with gas in the deaerator 10 after rushing out, an outlet of the deaerator 10 is connected with the double-steam-water-pressure waste heat boiler 1 through the third water pump 12 and the fourth water pump 11 respectively, hot water in the deaerator 10 can flow back to the double-steam-water-pressure waste heat boiler 1 and. The steam-water dual-pressure waste heat boiler 1 is connected with the steam drum 2, so that hot water in the steam-water dual-pressure waste heat boiler 1 can flow into the steam drum 2, is converted into high-pressure steam in the steam drum 2, and then flows back to the steam-water dual-pressure waste heat boiler 1.
When the steam-water double-pressure waste heat boiler works, high-pressure steam in the steam-water double-pressure waste heat boiler 1 flows into the steam turbine 3 to do work, so that the first generator 4 is driven to generate electricity, the high-pressure steam after doing work in the steam turbine 3 flows into the steam condenser 5 and exchanges heat with a cooling medium provided by the cooling tower 19 for cooling, and the high-pressure steam is converted into hot water and flows into the hot water tank 8 under the drive of the first water pump 6; the low-pressure hot water in the steam-water dual-pressure waste heat boiler 1 flows into the evaporator 18 and the preheater 17 in sequence, meanwhile, the organic working medium flows into the preheater 17 and then flows into the evaporator 18 under the drive of the organic working medium pump 16, so that the organic working medium exchanges heat with the low-pressure hot water in the preheater 17 and the evaporator 18 in sequence and is converted into organic working medium steam in the evaporator 18, the organic working medium steam flows into the expander 13 for acting, the second generator 14 can be driven to generate electricity, the organic working medium steam which does work in the expander 13 flows into the organic working medium condenser 15 and exchanges heat with a cooling medium provided by the cooling tower 19 for cooling, the organic working medium steam is converted into liquid and flows into the preheater 17 and the evaporator 18 again, and cyclic utilization and continuous acting are realized; the low-pressure hot water flows into the hot water tank 8 after flowing out of the preheater 6, the hot water in the hot water tank 8 flows into the steam-water dual-pressure waste heat boiler 1 under the drive of the second water pump 9 to be preheated, and then flows into the deaerator 10 from the steam-water dual-pressure waste heat boiler 1 to be deaerated, the deaerated hot water flows back to the steam-water dual-pressure waste heat boiler 1 under the drive of the third water pump 12 and the fourth water pump 11 respectively, and is converted into high-pressure steam and low-pressure hot water respectively and then is sent out from the steam-water dual-pressure waste heat boiler 1 again, so that the high-pressure steam and the low-pressure hot water are recycled at the same time, and the hot water is prevented from being; the steam-water double-pressure waste heat boiler 1 is connected with a steam drum 2, and hot water is converted into high-pressure steam through the steam drum 2 and then flows back to the steam-water double-pressure waste heat boiler 1.
Claims (7)
1. The utility model provides a two pressure waste heat power generation systems of soda, utilizes the two pressure waste heat boiler (1) of soda high-pressure steam and low pressure hot water to drive first generator (4) and second generator (14) respectively and generate electricity which characterized in that: the steam turbine (3) is connected to the first generator (4), the steam turbine (3) is connected with the steam-water double-pressure waste heat boiler (1) through a high-pressure steam pipeline, high-pressure steam flows into the steam turbine (3) to do work, a steam condenser (5), a first water pump (6) and a hot water tank (8) are sequentially connected to the outlet of the steam turbine (3), and the steam after the work is done is converted into hot water in the steam condenser (5) and flows into the hot water tank (8);
the second generator (14) is connected with an expander (13), the expander (13) is connected with an organic circulating pipeline for organic working media to flow circularly, the organic circulating pipeline is connected with an evaporator (18), a preheater (17), an organic working medium condenser (15) and an organic working medium pump (16), the evaporator (18) is also connected with the steam-water dual-pressure waste heat boiler (1), the preheater (17) is also connected with the hot water tank (8), and low-pressure hot water and the organic working media sequentially exchange heat in the evaporator (18) and the preheater (17) and then flow into the hot water tank (8); the organic working medium steam flows into an expansion machine (13) to do expansion work by exchanging heat in an evaporator (18) through the organic working medium and low-pressure hot water, the organic working medium steam flowing out of the expansion machine (13) is cooled through an organic working medium condenser (15), the organic working medium steam after expansion work is converted into organic working medium liquid, the organic working medium liquid and the low-pressure hot water exchange heat in a preheater (17), and the preheated organic working medium flows back into the evaporator (18) to realize the cyclic evaporation work of the organic working medium;
the hot water tank (8) is connected with the double-pressure steam-water waste heat boiler (1) through the second water pump (9), the double-pressure steam-water waste heat boiler (1) is further connected with the deaerator (10), hot water in the hot water tank (8) enters the double-pressure steam-water waste heat boiler (1) to be preheated and then flows into the deaerator (10), an outlet of the deaerator (10) is connected with the double-pressure steam-water waste heat boiler (1) through the third water pump (12) and the fourth water pump (11) respectively, hot water in the deaerator (10) can flow back to the double-pressure steam-water waste heat boiler (1) and is converted into high-pressure steam and low-pressure hot water respectively, and therefore cyclic utilization of the high-pressure steam and the low-pressure hot water is.
2. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: and the steam condenser (5) and the organic working medium condenser (15) are connected with cooling pipelines, the cooling pipelines are connected with a cooling tower (19) for providing cooling media into the cooling pipelines, and the cooling pipelines are also connected with a fifth water pump (20).
3. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: the organic working medium is pentafluoropropane.
4. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: the deaerator (10) is connected with a water jet air ejector, the water jet air ejector is connected with the water tank through a water return pipe, and a sixth water pump is connected to the water return pipe, so that water flow in the water tank enters the water jet air ejector and is returned to the water tank after being flushed out along with gas in the deaerator (10) by the water jet air ejector.
5. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: the top of the deaerator (10) is connected with a water ring vacuum pump.
6. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: the steam-water dual-pressure waste heat boiler (1) is connected with the steam drum (2), so that hot water in the steam-water dual-pressure waste heat boiler (1) can flow into the steam drum (2), is converted into high-pressure steam in the steam drum (2), and then flows back to the steam-water dual-pressure waste heat boiler (1).
7. The steam-water dual-pressure waste heat power generation system according to claim 1, characterized in that: a steam seal heater (7) is connected between the first water pump (6) and the hot water tank (8).
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| CN201921334640.0U CN210799058U (en) | 2019-08-16 | 2019-08-16 | Steam-water double-pressure waste heat power generation system |
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| CN201921334640.0U CN210799058U (en) | 2019-08-16 | 2019-08-16 | Steam-water double-pressure waste heat power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781025A (en) * | 2020-12-29 | 2021-05-11 | 哈尔滨锅炉厂有限责任公司 | Direct-flow steam-water system for waste heat boiler and use method thereof |
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2019
- 2019-08-16 CN CN201921334640.0U patent/CN210799058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781025A (en) * | 2020-12-29 | 2021-05-11 | 哈尔滨锅炉厂有限责任公司 | Direct-flow steam-water system for waste heat boiler and use method thereof |
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