Solar and steam hybrid power generation system

Abstract

Solar and steam hybrid power generation system including a solar steam generator, an external steam regulator, a turboset, and a power generator. A steam outlet end of the solar steam generator is connected to a steam inlet of the turboset. A steam outlet end of the external steam regulator is connected to the steam inlet of the turboset. A steam outlet of the turboset is connected to the input end of a condenser, and the output end of the condenser is connected to the input end of a deaerator. The output end of the deaerator is connected to the input end of a water feed pump. The output end of the water feed pump is connected to a circulating water input end of the solar steam generator. The output end of the water feed pump is connected to a water-return bypass of the external steam.

Claims

1. A solar and external steam hybrid power generation system, comprising: a) a solar steam generator for generating a steam by using solar energy; b) an external steam regulator, the external steam regulator comprising a heat exchanger; c) a turboset; d) a power generator, the power generator being coupled to the turboset; e) a condenser; f) a deaerator; g) a water feed pump; h) a first regulating valve; i) a second regulating valve; j) a first switch valve; k) a second switch valve; l) a third switch valve; m) a fourth switch valve; and n) a water-return bypass; wherein: a steam outlet end of the solar steam generator is connected to a steam inlet of the turboset via the first regulating valve for sending the steam to the turboset; the external steam regulator is adapted to receive an industrial waste steam and regulate a pressure and a temperature of the industrial waste steam; the second regulating valve is adapted to adjust a flow rate of the industrial waste steam in real-time according to an intensity of sunlight; a steam outlet end of the external steam regulator is also connected to the steam inlet of the turboset via the second regulating valve and the second switch valve for sending the industrial waste steam to the turboset; a steam outlet of the turboset is connected to an input end of the condenser, and an output end of the condenser is connected to an input end of the deaerator; an output end of the deaerator is connected to an input end of the water feed pump; an output end of the water feed pump is connected to a circulating water input end of the solar steam generator via the first switch valve; and the output end of the water feed pump is further connected to the water-return bypass via the fourth switch valve.

2. The system of claim 1, further comprising a third regulating valve, a water supply pump, and a soft water storage tank, wherein a water outlet of the soft water storage tank is connected to a water inlet of the deaerator via the water supply pump, and a first pipe connecting the water outlet of the soft water storage tank and the water inlet of the deaerator is provided with the third regulating valve and the third switch valve.

3. The system of claim 2, wherein a second pipe is connected to the steam inlet of the turboset; and a pressure manometer and a thermometer are connected to the second pipe.

4. The system of claim 3, wherein the solar steam generator comprises an overhead solar boiler and a plurality of heliostats matching therewith; an output end of a heat pipe of the overhead solar boiler is connected to the steam inlet of the turboset via the first regulating valve; and an input end of the heat pipe of the overhead solar boiler is connected to the output end of the water feed pump via the first switch valve.

5. The system of claim 2, wherein the solar steam generator comprises an overhead solar boiler and a plurality of heliostats matching therewith; an output end of a heat pipe of the overhead solar boiler is connected to the steam inlet of the turboset via the first regulating valve; and an input end of the heat pipe of the overhead solar boiler is connected to the output end of the water feed pump via the first switch valve.

6. The system of claim 1, wherein the solar steam generator comprises an overhead solar boiler and a plurality of heliostats matching therewith; an output end of a heat pipe of the overhead solar boiler is connected to the steam inlet of the turboset via the first regulating valve; and an input end of the heat pipe of the overhead solar boiler is connected to the output end of the water feed pump via the first switch valve.

7. A solar and external steam hybrid power generation system, comprising: a) a solar steam generator, the solar steam generator comprising an overhead solar boiler, a plurality of heliostats; and a regenerative heat exchanger; b) an external steam regulator the external steam regulator comprising a heat exchanger; c) a turboset; d) a power generator, the power generator being coupled to the turboset; e) a condenser; f) a deaerator; g) a water feed pump; h) a first regulating valve; i) a second regulating valve; j) a first switch valve; k) a second switch valve; l) a third switch valve; m) a fourth switch valve; n) a fifth switch valve; o) a water-return bypass; and p) a heat pump; wherein: the external steam regulator is adapted to receive an industrial waste steam and regulate a pressure and a temperature of the industrial waste steam; the regenerative heat exchanger is adapted to generate a steam; a steam outlet end of the external steam regulator is connected to a steam inlet of the turboset via the second regulating valve and the second switch valve; a steam outlet of the turboset is connected to an input end of the condenser, and an output end of the condenser is connected to an input end of the deaerator; an output end of the deaerator is connected to an input end of the water feed pump; an output end of the water feed pump is further connected to the water-return bypass via the fourth switch valve; an output end of a heat pipe of the overhead solar boiler is connected to a thermal medium inlet of the regenerative heat exchanger via the fifth switch valve, and a thermal medium outlet of the regenerative heat exchanger is connected to an input end of the heat pipe of the overhead solar boiler via the heat pump; a steam outlet of the regenerative heat exchanger is connected to the steam inlet of the turboset via the first regulating valve; and a circulating water inlet of the regenerative heat exchanger is connected to the output end of the water feed pump via the first switch valve.

8. The system of claim 7, further comprising a third regulating valve, a water supply pump, and a soft water storage tank, wherein a water outlet of the soft water storage tank is connected to a water inlet of the deaerator via the water supply pump, and a first pipe connecting the water outlet of the soft water storage tank and the water inlet of the deaerator is provided with the third regulating valve and the third switch valve.

9. The system of claim 8, wherein a second pipe is connected to the steam inlet of the turboset; and a pressure manometer and a thermometer are connected to the second pipe.

10. A solar and external steam hybrid power generation system, comprising: a) a solar steam generator; b) an external steam regulator the external steam regulator comprising a heat exchanger; c) a turboset, the turboset comprising a steam inlet and a steam outlet; d) a power generator, the power generator being coupled to the turboset; e) a condenser; f) a deaerator; g) a water feed pump; h) a first regulating valve; i) a second regulating valve; j) a first switch valve; k) a second switch valve; l) a third switch valve; m) a fourth switch valve; and n) a water-return bypass; wherein: the external steam regulator is adapted to receive an industrial waste steam and regulate a pressure and a temperature of the industrial waste steam; a steam outlet end of the solar steam generator is connected to a steam inlet of the turboset via the first regulating valve; a steam outlet end of the external steam regulator is also connected to the steam inlet of the turboset via the second regulating valve and the second switch valve; a steam outlet of the turboset is connected to an input end of the condenser, and an output end of the condenser is connected to an input end of the deaerator; an output end of the deaerator is connected to an input end of the water feed pump; an output end of the water feed pump is connected to a circulating water input end of the solar steam generator via the first switch valve; the output end of the water feed pump is further connected to the water-return bypass via the fourth switch valve; the solar steam generator comprises a plurality of solar vacuum heat pipes and a plurality of trough type parabolic reflectors matching therewith; output ends of the solar vacuum heat pipes are connected to the steam inlet of the turboset via the first regulating valve; and input ends of the solar vacuum heat pipes are connected to the output end of the water feed pump via the first switch valve.

11. The system of claim 10, further comprising a third regulating valve, a water supply pump, and a soft water storage tank, wherein a water outlet of the soft water storage tank is connected to a water inlet of the deaerator via the water supply pump, and a first pipe connecting the water outlet of the soft water storage tank and the water inlet of the deaerator is provided with the third regulating valve and the third switch valve.

12. The system of claim 11, wherein a second pipe is connected to the steam inlet of the turboset; and a pressure manometer and a thermometer are connected to the second pipe.

13. A solar and external steam hybrid power generation system, comprising: a) a solar steam generator, the solar steam generator comprising a plurality of solar vacuum heat pipes, a plurality of trough type parabolic reflectors; and a regenerative heat exchanger; b) an external steam regulator the external steam regulator comprising a heat exchanger; c) a turboset; d) a power generator, the power generator being coupled to the turboset; e) a condenser; f) a deaerator; g) a water feed pump; h) a first regulating valve; i) a second regulating valve; j) a first switch valve; k) a second switch valve; l) a third switch valve; m) a fourth switch valve; n) a fifth switch valve; o) a water-return bypass; and p) a heat pump; wherein: the external steam regulator is adapted to receive an industrial waste steam and regulate a pressure and a temperature of the industrial waste steam; the regenerative heat exchanger is adapted to generate a steam; a steam outlet end of the external steam regulator is connected to a steam inlet of the turboset via the second regulating valve and the second switch valve; a steam outlet of the turboset is connected to an input end of the condenser, and an output end of the condenser is connected to an input end of the deaerator; an output end of the deaerator is connected to an input end of the water feed pump; an output end of the water feed pump is further connected to the water-return bypass via the fourth switch valve; output ends of solar vacuum heat pipes are connected to a thermal medium inlet of the regenerative heat exchanger via the fifth switch valve, and a thermal medium outlet of the regenerative heat exchanger is connected to input ends of the solar vacuum heat pipes via the heat pump; a steam outlet of the regenerative heat exchanger is connected to the steam inlet of the turboset via the first regulating valve; and a circulating water inlet of the regenerative heat exchanger is connected to the output end of the water feed pump via the first switch valve.

14. The system of claim 13, further comprising a third regulating valve, a water supply pump, and a soft water storage tank, wherein a water outlet of the soft water storage tank is connected to a water inlet of the deaerator via the water supply pump, and a first pipe connecting the water outlet of the soft water storage tank and the water inlet of the deaerator is provided with the third regulating valve and the third switch valve.

15. The system of claim 14, wherein a second pipe is connected to the steam inlet of the turboset; and a pressure manometer and a thermometer are connected to the second pipe.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic diagram of a solar and external steam hybrid power generation system according to Example 1 of the invention, in which, an overhead solar boiler matching heliostats directly supplies steam for a turboset;

(2) FIG. 2 is a schematic diagram of a solar and external steam hybrid power generation system according to Example 2 of the invention, in which, an overhead solar boiler matching heliostats indirectly supplies steam for a turboset through heat exchange;

(3) FIG. 3 is a schematic diagram of a solar and external steam hybrid power generation system according to Example 3 of the invention, in which, solar vacuum heat pipes matching trough type parabolic reflectors directly supplies steam for a turboset; and

(4) FIG. 4 is a schematic diagram of a solar and external steam hybrid power generation system according to Example 4 of the invention, in which, solar vacuum heat pipes matching trough type parabolic reflectors indirectly supplies steam for a turboset through heat exchange

DETAILED DESCRIPTION OF THE EMBODIMENTS

(5) For further illustrating the invention, experiments detailing a solar and external steam hybrid power generation system are described below. It should be noted that the following examples are intended to describe and not to limit the invention.

Example 1

(6) As shown in FIG. 1, a solar and external steam hybrid power generation system primarily comprises: a solar steam generator, an external steam regulator 15, a turboset 2, and a power generator 1 coupled to the turboset 2, a condenser 5, a deaerator 6, a water feed pump 7, a soft water storage tank 9, and a water supply pump 8, which are assembled by pipes and valves. The valves comprise a first switch valve 16, a second switch valve 19, a third switch valve 21, a fourth switch valve 23, and a fifth switch valve 17 for controlling connection and disconnection of the pipes, and a first regulating valve 18, a second regulating valve 20, and a third regulating valve 22 for regulating the flow rate in the pipes.

(7) The solar steam generator further comprises an overhead solar boiler 13 and a plurality of heliostats 14 matching therewith. The heliostats 14 are capable of tracing the sun to enable the sunlight to always concentrate on a heat pipe of the overhead solar boiler 13. An output end of the heat pipe of the overhead solar boiler 13 is connected to a high pressure steam inlet 3 of the turboset 2 via the fifth switch valve 17 and the first regulating valve 18. A steam outlet end of the external steam regulator 15 is also connected to the high pressure steam inlet 3 of the turboset 2 via the second regulating valve 20 and the second switch valve 19. A second pipe close to the high pressure steam inlet 3 of the turboset 2 is provided with a pressure manometer P and a thermometer T for directly displaying pressure and temperature parameters of the steam.

(8) A low pressure steam outlet 4 of the turboset 2 is connected to an input end of the condenser 5, and an output end of the condenser 5 is connected to an input end of the deaerator 6. A water outlet of the soft water storage tank 9 is connected a water inlet of the deaerator 6 via a water supply pump 8. The third regulating valve 22 and the third switch valve 21 are disposed on a first pipe connecting the water outlet of the soft water storage tank 9 and the water inlet of the deaerator 6 for controlling the open and close of a water supply pipe and the volume of the supplying water. An output end of the deaerator 6 is connected to an input end of the water feed pump 7; and an output end of the water feed pump 7 is connected to an input end of the heat pipe of the overhead solar boiler 13 via the first switch valve 16, thereby forming a circulation loop of the solar steam generator. The output end of the water feed pump 7 is further connected to a water-return bypass 11 of the external steam via the fourth switch valve 23, thereby forming a circulation loop for the work of the external steam.

(9) Working process of the solar and external steam hybrid power generation system of Example 1 is as follows: in daytimes when the sunlight is abundant, the second switch valve 19 and the fourth switch valve 23 are close, the first switch valve 16, the third switch valve 21, and the fifth switch valve 17 are open, and the system runs at a concentrating solar thermal power generation state. At the time, the heliostats 14 trace the sunlight and concentrate the thermal energy of the sunlight on the heat pipe of the overhead solar boiler 13 to heat the circulating water therein to form a high temperature and high pressure steam. The high temperature and high pressure steam is output from the heat pipe of the overhead solar boiler 13, regulated by the first regulating valve 18 to reach a rated pressure and a rated temperature, and transported to the turboset 2 to do work for generating power. Steam after doing work is cooled by the condenser 5 to form normal pressure and low temperature water at approximately 40° C. which is transported to the deaerator 6 for removal of the dissolved oxygen and then transported back to the heat pipe of the overhead solar boiler 13 via the water feed pump 7 for a next circulation. Meanwhile, surface water or well water is collected, preliminarily purified, treated by a chemical water treatment plant for removing calcium and magnesium ions therein, and transported and stored in the soft water storage tank 9. When water is required to be supplied, soft water is sucked by the water supply pump 8, a flow rate of the water is then regulated by the third regulating valve 22, and the soft water is transported to the deaerator 6 for supplementing the water loss.

(10) At night or in rainy and cloudy days, the first switch valve 16, the third switch valve 21, and the fifth valve 17 are close, the first regulating valve 18 and the third regulating valve 22 stay at zero positions, the second switch valve 19 and the fourth switch valve 23 are open, and the system runs at the external steam power generation state. An external waste steam is introduced to the external steam regulator 15 for decreasing pressure and temperature or increasing pressure and temperature according to practical working condition of the waste steam, then fine regulated by the second regulating valve to reach the rated pressure and rated temperature, and transported to the turboset 2 to do work. The steam after doing work is cooled by the condenser 5 to form normal pressure and low temperature water at approximately 40° C. which is transported to the deaerator 6 for removal of the dissolved oxygen and then transported back to the external waste steam source via the water feed pump 7 and the water-return bypass 11 of the external steam or transported and stored in the soft water storage tank 9.

Example 2

(11) As shown in FIG. 2, a solar and external steam hybrid power generation system primarily comprises: a solar steam generator, an external steam regulator 15, a turboset 2, and a power generator 1 coupled to the turboset 2, a condenser 5, a deaerator 6, a water feed pump 7, a soft water storage tank 9, and a water supply pump 8, which are assembled by pipes and valves. The valves comprise a first switch valve 16, a second switch valve 19, a third switch valve 21, a fourth switch valve 23, and a fifth switch valve 17 for controlling connection and disconnection of the pipes, and a first regulating valve 18, a second regulating valve 20, and a third regulating valve 22 for regulating the flow rate in the pipes.

(12) The solar steam generator further comprises an overhead solar boiler 13 and a plurality of heliostats 14 matching therewith. The heliostats 14 are capable of tracing the sun to enable the sunlight to always concentrate on a heat pipe of the overhead solar boiler 13. An output end of a heat pipe of the overhead solar boiler 13 is connected to a thermal medium inlet of a regenerative heat exchanger 12 via the fifth switch valve 17, and a thermal medium outlet of the regenerative heat exchanger 12 is connected to an input end of the heat pipe of the overhead solar boiler 13 via a heat pump 10. The thermal medium is a mixed solution comprising biphenyl and diphenyl oxide filled in the regenerative heat exchanger 12 provided with a heat insulation layer. When the thermal medium absorbs heat, a temperature thereof increases to approximately 400° C., which is enough to be used for heat exchange to produce high temperature and high pressure steam. A steam outlet of the regenerative heat exchanger 12 is connected to the high pressure steam inlet 3 of the turboset 2 via the first regulating valve 18. A steam outlet end of the external steam regulator 15 is also connected to the high pressure steam inlet 3 of the turboset 2 via the second regulating valve 20 and the second switch valve 19. A second pipe close to the high pressure steam inlet 3 of the turboset 2 is provided with a pressure manometer P and a thermometer T for directly displaying pressure and temperature parameters of the steam.

(13) A low pressure steam outlet 4 of the turboset 2 is connected to an input end of the condenser 5, and an output end of the condenser 5 is connected to an input end of the deaerator 6. A water outlet of the soft water storage tank 9 is connected a water inlet of the deaerator 6 via a water supply pump 8. The third regulating valve 22 and the third switch valve 21 are disposed on a first pipe connecting the water outlet of the soft water storage tank 9 and the water inlet of the deaerator 6 for controlling the open and close of a water supply pipe and the volume of the supplying water. An output end of the deaerator 6 is connected to an input end of the water feed pump 7; and an output end of the water feed pump 7 is connected to a circulating water inlet of the regenerative heat exchanger 12 via the first switch valve 16, thereby forming a circulation loop of the solar steam generator. The output end of the water feed pump 7 is further connected to a water-return bypass 11 of the external steam via the fourth switch valve 23, thereby forming a circulation loop for the work of the external steam.

(14) Working process of the solar and external steam hybrid power generation system of Example 2 is as follows: in daytimes when the sunlight is abundant, the second switch valve 19 and the fourth switch valve 23 are close, the first switch valve 16, the third switch valve 21, and the fifth switch valve 17 are open, and the system runs at a concentrating solar thermal power generation state. At the time, the heliostats 14 trace the sunlight and concentrate the thermal energy of the sunlight on the heat pipe of the overhead solar boiler 13 to enable the thermal medium therein, the mixed solution comprising biphenyl and diphenyl oxide, to absorb heat. The mixed solution comprising biphenyl and diphenyl oxide heated to approximately 400° C. flows to the regenerative heat exchanger 12 via the fifth switch valve 17 and exchanges heat with the circulating water in another pipe of the regenerative heat exchanger 12. Thus, the temperature of the mixed solution comprising biphenyl and diphenyl oxide gradually decreases, approximately 245° C. after flowing out of the regenerative heat exchanger 12. The mixed solution comprising biphenyl and diphenyl oxide is transported back to the heat pipe of the overhead solar boiler 13 by the drive of the heat pump 10, for a next circulation of solar energy absorption. The circulating water in the regenerative heat exchanger 12 is transformed into the high temperature and high pressure steam after the heat exchange with the high temperature mixed solution comprising biphenyl and diphenyl oxide. The high temperature and high pressure steam is output from the regenerative heat exchanger 12, regulated by the first regulating valve 18 to reach a rated pressure and a rated temperature, and then transported to the turboset 2 to do work. Steam after doing work is cooled by the condenser 5 to form normal pressure and low temperature water at approximately 40° C. which is transported to the deaerator 6 for removal of the dissolved oxygen and then transported back to the regenerative heat exchanger 12 for heat exchange via the water feed pump 7, thereby forming high temperature and high pressure steam again. Meanwhile, surface water or well water is collected, preliminarily purified, treated by chemical water treatment plant for removing calcium and magnesium ions therein, and transported and stored in the soft water storage tank 9. When water is required to be supplied, soft water is sucked by the water supply pump 8, a flow rate of the soft water is then regulated by the third regulating valve 22, and the soft water is transported to the deaerator 6 for supplementing the water loss.

(15) At night or in rainy and cloudy days, the first switch valve 16, the third switch valve 21, and the fifth valve 17 are close, the first regulating valve 18 and the third regulating valve 22 stay at zero positions, the second switch valve 19 and the fourth switch valve 23 are open, and the system runs at the external steam power generation state. An external waste steam is introduced to the external steam regulator 15 for decreasing pressure and temperature or increasing pressure and temperature according to practical working condition of the waste steam, then fine regulated by the second regulating valve to reach the rated pressure and rated temperature, and transported to the turboset 2 to do work. The steam after doing work is cooled by the condenser 5 to form normal pressure and low temperature water at approximately 40° C. which is transported to the deaerator 6 for removal of the dissolved oxygen and then transported back to the external waste steam source via the water feed pump 7 and the water-return bypass 11 of the external steam or transported and stored in the soft water storage tank 9.

Example 3

(16) As shown in FIG. 3, a structure of a solar and external steam hybrid power generation system is basically the same as that shown in FIG. 1 except for some slight variations that the solar steam generator comprises a plurality of solar vacuum heat pipes 13′ and a plurality of trough type parabolic reflectors 14′ matching therewith. Output ends of the solar vacuum heat pipes 13′ are connected to the high pressure steam inlet 3 of the turboset 2 via the fifth switch valve 17 and the first regulating valve 18. Input ends of the solar vacuum heat pipes 13′ are connected to the output end of the water feed pump 7 via the first switch valve 16. Working processes of the two solar and external steam hybrid power generation systems are basically the same, so that it will not be repeatedly illustrated herein.

Example 4

(17) As shown in FIG. 4, a structure of a solar and external steam hybrid power generation system is basically the same as that shown in FIG. 2 except for some slight variations that the solar steam generator comprises a plurality of solar vacuum heat pipes 13′ and a plurality of trough type parabolic reflectors 14′ matching therewith. Output ends of solar vacuum heat pipes 13′ are connected to a thermal medium inlet of a regenerative heat exchanger 12 via a fifth switch valve 17. A thermal medium outlet of the regenerative heat exchanger 12 is connected to input ends of the solar vacuum heat pipes 13′ via a heat pump 10. A steam outlet of the regenerative heat exchanger 12 is connected to the high pressure steam inlet 3 of the turboset 2 via the first regulating valve 18. A circulating water inlet of the regenerative heat exchanger 12 is connected to the output end of the water feed pump 7 via the first switch valve 16. Working processes of the two solar and external steam hybrid power generation systems are basically the same, so that it will not be repeatedly illustrated herein.

(18) While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.