CN117823369A - Photo-thermal type energy carrying and single-working-medium combined cycle steam power device - Google Patents
Photo-thermal type energy carrying and single-working-medium combined cycle steam power device Download PDFInfo
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Abstract
The invention provides a photo-thermal energy carrying single-working-medium combined cycle steam power device, and belongs to the technical field of thermodynamics and thermal power. The outside is provided with a fuel channel which is communicated with the heating furnace, the outside is provided with an air channel which is communicated with the heating furnace through a heat source regenerator, the heating furnace is provided with a fuel gas channel which is communicated with the outside through the heat source regenerator, the compressor is provided with a first steam channel which is communicated with the second expander through the regenerator, the second expander is provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is provided with a second steam channel which is communicated with the heating furnace, the condenser is communicated with the heating furnace through a booster pump and the evaporator, the heating furnace is provided with a steam channel which is communicated with the evaporator through a solar heat collecting system, the expander and the regenerator, and the evaporator is provided with a low-pressure steam channel which is divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the photo-thermal energy carrying single-working-medium combined cycle steam power device.
Description
Technical field:
the invention belongs to the technical field of thermodynamics and thermal dynamics.
The background technology is as follows:
photo-thermal, fuel, and conventional heat resources represented by industrial waste heat and geothermal heat can realize thermal work; different system devices are constructed by adopting the same or different thermal power principles, and corresponding construction cost is paid, so that the conversion of photo-thermal, fuel or conventional thermal resources into mechanical energy is realized; therefore, it is of positive interest to try to reduce the number of thermal power devices.
The improvement of the photo-thermal temperature is an important direction of solar energy utilization and development, and the higher the photo-thermal temperature is, the corresponding construction cost is obviously increased; the method is limited by factors such as working principle, working medium property, material property, safety and the like, the temperature difference irreversible loss exists in the application process of photo-thermal, and the temperature difference irreversible loss exists in the fuel combustion process; the conventional heat resources represented by industrial waste heat and geothermal heat have room for improving the heat efficiency, but under the traditional technical condition, the heat efficiency is difficult to obtain breakthrough improvement.
In order to increase the thermal efficiency, it is necessary to bring the circulating medium to as high a temperature as possible after the high-temperature load is obtained; however, at this time, the temperature of the circulating working medium discharged by the high-temperature expander is increased, the heat discharge is increased, and the heat transfer temperature difference loss in the thermodynamic system is increased, which has an adverse effect on the improvement of the heat-variable work efficiency.
Based on the principle of simply, actively, safely and efficiently utilizing energy to obtain power, the invention provides a photo-thermal energy carrying and single-working-medium combined cycle steam power device which has reasonable thermodynamic perfection and high cost performance and has reasonable flow, simple structure and obviously reduced systematic temperature difference irreversible loss of the thermal power device.
The invention comprises the following steps:
the invention mainly aims to provide a photo-thermal type energy carrying and single-working-medium combined cycle steam power device, and the specific invention is described as follows:
1. the photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with the heating furnace, the outside is also provided with an air channel which is communicated with the heating furnace through a heat source regenerator, the heating furnace is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator, the compressor is provided with a first steam channel which is communicated with the second expander through the regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the heating furnace, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, the evaporator is also provided with a steam channel which is communicated with the heating furnace, the heating furnace is also provided with a steam channel which is communicated with the expander through a solar heat collecting system, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor and the booster pump and transmits power.
2. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with the heating furnace, the outside is also provided with an air channel which is communicated with the heating furnace through a heat source regenerator, the heating furnace is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator, the compressor is provided with a first steam channel which is communicated with the second expander through the regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the heating furnace, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the heating furnace, the heating furnace is also provided with a steam channel which is communicated with the expander through a solar heat collecting system, the expander is also provided with a steam channel which is communicated with the evaporator through the regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor and the booster pump and transmits power.
3. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collecting system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with the heating furnace, the outside is also provided with an air channel which is communicated with the heating furnace through a heat source regenerator, the heating furnace is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator, the compressor is provided with a first steam channel which is communicated with the second expander through the regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the heating furnace through the second regenerator, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, the evaporator is further provided with a steam channel which is communicated with the heating furnace through the second regenerator, the heating furnace is also provided with a steam channel which is communicated with the expander through a solar heat collecting system, the expander is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor and the booster pump and transmits power.
4. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collecting system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with the heating furnace, the outside is also provided with an air channel which is communicated with the heating furnace through a heat source regenerator, the heating furnace is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator, the compressor is provided with a first steam channel which is communicated with the second expander through the regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the heating furnace through the second regenerator, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, the evaporator is further provided with a steam channel which is communicated with the heating furnace through the second regenerator, the heating furnace is also provided with a steam channel which is communicated with the expander through a solar heat collecting system, the expander is further provided with a low-pressure steam channel which is communicated with the evaporator through the regenerator after the second regenerator, and the evaporator is further provided with the low-pressure steam channel which is divided into two paths, namely the first path which is communicated with the compressor and the second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor and the booster pump and transmits power.
5. A photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed by adding a second booster pump and a low-temperature heat regenerator in any one of the photo-thermal type energy carrying and single-working-medium combined cycle steam power devices in the 1 st to 4 th, adjusting the communication of a condenser with a condensate pipe and the booster pump to the communication of the condenser with the condensate pipe and the low-temperature heat regenerator through the second booster pump, adding a steam extraction channel to the compressor to be communicated with the low-temperature heat regenerator, and communicating the low-temperature heat regenerator with the condensate pipe and the booster pump.
6. A photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed by adding a second evaporator and a diffusion pipe in any one of the photo-thermal type energy carrying and single-working-medium combined cycle steam power devices in the 1 st, the 3 rd and the 4 th, adjusting the communication between a low-pressure steam channel of a regenerator and the evaporator to be the communication between the low-pressure steam channel of the regenerator and the second evaporator through the evaporator, adjusting the communication between the low-pressure steam channel of the second expander and the evaporator to be the communication between the low-pressure steam channel of the second expander and the second evaporator through the evaporator, adjusting the communication between the low-pressure steam channel of the evaporator and the compressor respectively to be the low-pressure steam channel of the second evaporator and the compressor respectively, adjusting the communication between the condensate pipe of the condenser and the evaporator to be the condensate pipe of the condenser and the second evaporator through the booster pump, and then adjusting the communication between the second evaporator and the diffusion pipe to be the wet steam channel of the second evaporator.
7. The photo-thermal type energy carrying and single-working-medium combined cycle steam power device is characterized in that in the photo-thermal type energy carrying and single-working-medium combined cycle steam power device in the 2 nd step, a second evaporator and a diffuser pipe are added, the communication between an expander with a low-pressure steam channel and the evaporator is adjusted to be that the expander with the low-pressure steam channel is communicated with the second evaporator through the evaporator, the communication between the second expander with the low-pressure steam channel and the evaporator is adjusted to be that the second expander with the low-pressure steam channel is communicated with the second evaporator through the evaporator, the evaporator with the low-pressure steam channel is respectively communicated with the compressor and the condenser, the condenser with a condensate pipe is adjusted to be that the condenser with the condensate pipe is communicated with the second evaporator through the booster pump, and then the second evaporator with a wet steam channel is communicated with the evaporator through the diffuser pipe, so that the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
8. The photo-thermal energy carrying and single-working-medium combined cycle steam power device is characterized in that in any one of the photo-thermal energy carrying and single-working-medium combined cycle steam power devices in the 1 st to 7 th, an expansion speed increaser is added and replaces an expansion machine, a second expansion speed increaser is added and replaces a second expansion machine, a dual-energy compressor is added and replaces a compressor, a newly added diffuser pipe is added and replaces a booster pump, and the photo-thermal energy carrying and single-working-medium combined cycle steam power device is formed.
9. The photo-thermal type energy carrying and single-working-medium combined cycle steam power device is characterized in that in any one of the photo-thermal type energy carrying and single-working-medium combined cycle steam power devices in the 1 st to 8 th, a fuel channel communicated with a heating furnace from outside is omitted, a heat source regenerator is omitted, an air channel communicated with the heating furnace from outside through the heat source regenerator is omitted, a gas channel communicated with the outside through the heat source regenerator from the heating furnace is omitted, a heat source heat exchanger is added to replace the heating furnace, and a heat source medium channel is also communicated with the outside to form the photo-thermal type energy carrying and single-working-medium combined cycle steam power device.
Description of the drawings:
fig. 1 is a schematic thermodynamic system diagram of a photo-thermal energy carrying single-working-medium combined cycle steam power plant according to the 1 st principle.
Fig. 2 is a schematic thermodynamic system diagram of a photo-thermal energy carrying single-working-medium combined cycle steam power plant according to the invention.
FIG. 3 is a schematic thermodynamic system diagram of a combined cycle steam power plant with a single working medium for photo-thermal energy generation according to the present invention.
Fig. 4 is a schematic thermodynamic system diagram of a photo-thermal energy co-single-working-medium combined cycle steam power plant according to the 4 th principle.
Fig. 5 is a schematic thermodynamic system diagram of a photo-thermal energy co-single-working-medium combined cycle steam power plant according to the invention.
FIG. 6 is a schematic thermodynamic system diagram of a combined cycle steam power plant with a single working medium for photo-thermal energy generation according to the present invention.
Fig. 7 is a schematic thermodynamic system diagram of a photo-thermal energy co-single-working-medium combined cycle steam power plant according to the invention.
Fig. 8 is a schematic thermodynamic system diagram of an 8 th principle thermodynamic system of a photo-thermal energy carrying single-working-medium combined cycle steam power plant according to the present invention.
In the figure, a 1-expander, a 2-second expander, a 3-compressor, a 4-booster pump, a 5-regenerator, a 6-condenser, a 7-evaporator, an 8-heating furnace, a 9-heat source regenerator, a 10-solar heat collection system, a 11-second regenerator, a 12-second booster pump, a 13-low temperature regenerator, a 14-second evaporator, a 15-diffuser pipe and a 16-heat source heat exchanger are arranged; a-expansion speed increaser, B-second expansion speed increaser, C-dual-energy compressor and D-newly added diffuser.
The following brief description is given here about the photo-thermal and solar heat collection system:
(1) Solar heat collection systems, also known as solar heating systems, refer to heating systems that utilize a heat collector to convert solar radiant energy into high temperature heat (simply referred to as photo-thermal), which can be used to provide a driving heat load to a thermodynamic cycle system; it is mainly composed of heat collector and related necessary auxiliary facilities.
(2) Types of solar energy collection systems include, but are not limited to: (1) the concentrating solar heat collection system mainly comprises a groove type system, a tower type system and a butterfly type system at present; (2) the non-concentrating solar heat collecting system has solar pond, solar chimney and other systems.
(3) There are two main types of heat supply modes of solar heat collection systems at present: (1) the high-temperature heat energy converted by solar energy is directly supplied to a heated medium flowing through a solar heat collection system; (2) the high-temperature heat energy converted from solar energy is firstly supplied to the working medium of the self-circulation loop, and then the working medium is supplied to the heated medium flowing through the solar heat collection system through the heat exchanger.
The specific embodiment is as follows:
it is to be noted that the description of the structure and the flow is not repeated if necessary; obvious procedures are not described. The invention is described in detail below with reference to the drawings and examples.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 1 is realized by the following steps:
(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with a heating furnace 8, the outside is also provided with an air channel which is communicated with the heating furnace 8 through a heat source regenerator 9, the heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator 9, the compressor 3 is provided with a first steam channel which is communicated with a second expander 2 through a regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with an evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the heating furnace 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through a booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the heating furnace 8, the heating furnace 8 is also provided with a steam channel which is communicated with the expander 1 through a solar heat collecting system 10, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the regenerator 5, and the evaporator 7 is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 is connected to the compressor 3 and transmits power.
(2) In the flow, external fuel enters the heating furnace 8, external air enters the heating furnace 8 after absorbing heat and raising temperature through the heat source regenerator 9, fuel and air are mixed in the heating furnace 8 and combusted to generate fuel gas with higher temperature, the fuel gas releases heat in steam flowing through the heating furnace 8, and then the fuel gas releases heat and lowers temperature through the heat source regenerator 9 and is discharged outwards; part of low-pressure steam discharged by the evaporator 7 enters the compressor 3 to be boosted and heated to a certain extent and then is divided into two paths, wherein the first path is subjected to heat absorption and heating through the heat regenerator 5 and is subjected to depressurization and work through the second expander 2 and then is provided for the evaporator 7, and the second path is subjected to heat absorption and heating through the heating furnace 8 after the second path is continuously boosted and heated; the condensate discharged by the condenser 6 is boosted by the booster pump 4, is heated and vaporized by the heat absorption of the evaporator 7, and then enters the heating furnace 8 to absorb the heat and raise the temperature; steam discharged by the heating furnace 8 is subjected to heat absorption and temperature rise through the solar heat collection system 10, reduced in pressure and work through the expander 1, released in heat and temperature reduction through the heat regenerator 5, and then provided for the evaporator 7; the low-pressure steam discharged by the heat regenerator 5 and the second expander 2 flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to raise the pressure and the temperature, and the second path enters the condenser 6 to release heat and condense; the fuel provides driving heat load through the heating furnace 8, the solar energy provides driving heat load through the solar heat collecting system 10, the cooling medium takes away low-temperature heat load through the condenser 6, and the air and the fuel gas take away discharging heat load through the inlet and outlet heating furnace 8; work output by the expander 1 and the second expander 2 is provided for the compressor 3 and external power, or work output by the expander 1 and the second expander 2 is provided for the compressor 3, the booster pump 4 and external power, so that the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 2 is realized by the following steps:
(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with a heating furnace 8, the outside is also provided with an air channel which is communicated with the heating furnace 8 through a heat source regenerator 9, the heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator 9, the compressor 3 is provided with a first steam channel which is communicated with a second expander 2 through a regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with an evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the heating furnace 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through a booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the heating furnace 8, the heating furnace 8 is also provided with a steam channel which is communicated with the expander 1 through a solar heat collecting system 10, the expander 1 is further provided with a low-pressure steam channel which is communicated with the evaporator 7 after the heat regenerator 5 is communicated with the evaporator 1, and the low-pressure steam channel is further divided into two paths, namely the first path which is communicated with the compressor 3 and the second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 is connected to the compressor 3 and transmits power.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the steam discharged by the solar heat collection system 10 enters the expander 1 to perform depressurization and work, flows through the regenerator 5 to release heat and cool to a certain extent, enters the expander 1 to continue depressurization and work, and then is provided for the evaporator 7 to form the photo-thermal energy carrying and single-working-medium combined cycle steam power device.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 3 is realized by the following steps:
(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collection system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with the heating furnace 8, the outside is also provided with an air channel which is communicated with the heating furnace 8 through a heat source regenerator 9, the heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator 9, the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the heating furnace 8 through the second regenerator 11 after the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, the evaporator 7 is also provided with a steam channel which is communicated with the heating furnace 8 through the second regenerator 11, the heating furnace 8 is also provided with a steam channel which is communicated with the expander 1 through the solar heat collection system 10, and the expander 1 is also provided with a low-pressure steam channel which is divided into two paths, namely the first path which is communicated with the compressor 3 and the second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 is connected to the compressor 3 and transmits power.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the high-pressure steam discharged from the evaporator 7 and the compressor 3 flows through the second regenerator 11 to absorb heat and raise temperature, and is then supplied to the heating furnace 8; the low-pressure steam discharged by the expander 1 flows through the second heat regenerator 11, the heat regenerator 5 and the evaporator 7 to release heat and cool gradually, and then respectively enters the compressor 3 to raise the pressure and raise the temperature and enters the condenser 6 to release heat and condense, so that the photo-thermal energy carrying single-working-medium combined cycle steam power device is formed.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 4 is realized by the following steps:
(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collection system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with a heating furnace 8, the outside is also provided with an air channel which is communicated with the heating furnace 8 through a heat source regenerator 9, the heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator 9, the compressor 3 is provided with a first steam channel which is communicated with a second expander 2 through a regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with an evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the heating furnace 8 through a second regenerator 11, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through a booster pump 4, the evaporator 7 is also provided with a steam channel which is communicated with the heating furnace 8 through a second regenerator 11, the heating furnace 8 is also provided with a steam channel which is communicated with the expander 1 through a solar heat collection system 10, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the regenerator 5 after the second regenerator 11 is also communicated with the evaporator 7, and the low-pressure steam channel is divided into two paths-namely the first path 3 which is communicated with the compressor 3 and the second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 is connected to the compressor 3 and transmits power.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the high-pressure steam discharged from the evaporator 7 and the compressor 3 flows through the second regenerator 11 to absorb heat and raise temperature, and is then supplied to the heating furnace 8; the steam discharged by the solar heat collection system 10 enters the expander 1 to perform decompression and work, flows through the second heat regenerator 11 to release heat and reduce temperature to a certain extent, enters the expander 1 to continue decompression and work, flows through the heat regenerator 5 to release heat and reduce temperature, and then is supplied to the evaporator 7 to form the photo-thermal energy carrying single-working-medium combined cycle steam power device.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 5 is realized by the following steps:
(1) Structurally, in the photo-thermal type energy carrying single-working-medium combined cycle steam power device shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, a condensate pipe of a condenser 6 is communicated with a booster pump 4, the condenser 6 is communicated with a low-temperature heat regenerator 13 through a second booster pump 12, a steam extraction channel is additionally arranged on a compressor 3 and is communicated with the low-temperature heat regenerator 13, and the low-temperature heat regenerator 13 is communicated with the booster pump 4 through a condensate pipe.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 6 flows through the second booster pump 12 to be boosted and then enters the low-temperature regenerator 13 to be mixed with the extracted steam from the compressor 3, absorbs heat and heats up, and the extracted steam is released to form condensate; condensate of the low-temperature heat regenerator 13 flows through the booster pump 4 to boost pressure, and then enters the evaporator 7 to absorb heat to raise temperature and vaporize; the low-pressure steam discharged by the heat regenerator 5 and the second expander 2 flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to raise the pressure and the temperature, and the second path enters the condenser 6 to release heat and condense; the low-pressure steam enters the compressor 3 to be boosted and heated to a certain extent, and then is divided into two paths, namely a first path is provided for the low-temperature heat regenerator 13, and a second path is further divided into two paths, namely a first path is provided for the heat regenerator 5 and a second path enters the heating furnace 8 after being boosted and heated, so that the photo-thermal energy carrying same-single-working-medium combined cycle steam power device is formed.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 6 is realized by the following steps:
(1) In the combined cycle steam power plant with the photo-thermal energy and the single working medium shown in fig. 1, a second evaporator and a diffuser pipe are added, the communication between a low-pressure steam channel of the heat regenerator 5 and the evaporator 7 is adjusted to be that the low-pressure steam channel of the heat regenerator 5 is communicated with the second evaporator 14 through the evaporator 7, the communication between the low-pressure steam channel of the second expander 2 and the evaporator 7 is adjusted to be that the low-pressure steam channel of the second expander 2 is communicated with the second evaporator 14 through the evaporator 7, the communication between the low-pressure steam channel of the evaporator 7 and the compressor 3 and the condenser 6 is respectively adjusted to be that the low-pressure steam channel of the second evaporator 14 is respectively communicated with the compressor 3 and the condenser 6, the communication between the condenser 6 and the condenser 6 through the booster pump 4 and the evaporator 7 is adjusted to be that the condensate channel of the condenser 6 is communicated with the second evaporator 14 through the booster pump 4 and then the wet steam channel of the second evaporator 14 is communicated with the evaporator 7 through the diffuser pipe 15.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 6 is boosted by the booster pump 4, is absorbed by the second evaporator 14 to be warmed, partially vaporized and accelerated, is reduced in speed and boosted by the diffuser pipe 15, and then enters the evaporator 7 to absorb heat and vaporize; low-pressure steam discharged by the heat regenerator 5 and the second expander 2 is gradually released and cooled through the evaporator 7 and the second evaporator 14, and then respectively enters the compressor 3 to be boosted and heated and enters the condenser 6 to be released and condensed, so that the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
The photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 7 is realized by the following steps:
(1) Structurally, in the photo-thermal type energy carrying and single-working-medium combined cycle steam power device shown in fig. 1, an expansion speed increaser A is added to replace an expansion machine 1, a second expansion speed increaser B is added to replace a second expansion machine 2, a dual-energy compressor C is added to replace a compressor 3, a new diffusion pipe D is added to replace a booster pump 4.
(2) In the flow, compared with the photo-thermal energy carrying and single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: part of low-pressure steam discharged by the evaporator 7 enters the dual-energy compressor C to be boosted, heated and decelerated to a certain extent and then is divided into two paths, wherein the first path is subjected to heat absorption and heating through the heat regenerator 5, and the second path is subjected to depressurization, work and acceleration through the second expansion speed increaser B and then is provided for the evaporator 7, and the second path is subjected to heat absorption and heating through the heating furnace 8 after the second path is subjected to continuous boosting and heating; condensate discharged by the condenser 6 flows through the newly added diffuser pipe D to be reduced in speed and boosted, flows through the evaporator 7 to absorb heat and raise temperature and vaporize, and then enters the heating furnace 8 to absorb heat and raise temperature; steam discharged by the heating furnace 8 is subjected to heat absorption and temperature rise through the solar heat collection system 10, is subjected to depressurization and speed reduction through the expansion speed increaser A, is subjected to heat release and temperature reduction through the heat regenerator 5, and is then provided for the evaporator 7; the low-pressure steam discharged by the heat regenerator 5 and the second expansion speed increaser B flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the dual-energy compressor C to raise the pressure and raise the temperature and reduce the speed, and the second path enters the condenser 6 to release heat and condense; the work output by the expansion speed increaser A and the second expansion speed increaser B is provided for the dual-energy compressor C and external power to form the photo-thermal type energy carrying single-working-medium combined cycle steam power device.
The photo-thermal energy source carrying and single-working-medium combined cycle steam power device shown in fig. 8 is realized by the following steps:
in the photo-thermal type energy carrying single-working-medium combined cycle steam power device shown in fig. 1, a fuel channel which is externally communicated with a heating furnace 8 is omitted, a heat source regenerator 9 is omitted, an air channel which is externally communicated with the heating furnace 8 through the heat source regenerator 9 is omitted, a fuel gas channel which is externally communicated with the heating furnace 8 through the heat source regenerator 9 is omitted, a heat source heat exchanger 16 is added to replace the heating furnace 8, and the heat source heat exchanger 16 and a heat source medium channel are also communicated with the outside; the heat source medium flows through the heat source heat exchanger 16 and provides driving heat load, so that the photo-thermal energy source carrying the single-working-medium combined cycle steam power plant is formed.
The photo-thermal energy source carrying single-working-medium combined cycle steam power device has the following effects and advantages:
(1) The photo-thermal and fuel (especially low grade fuel) or photo-thermal and conventional heat resources share the integrated thermal power system, the thermal power systems of different driving energy sources are combined into one, the construction cost of the thermal power system is saved, and the cost performance is high.
(2) And the cross type and cross grade energy carrying is realized between the photo-thermal and fuel or between the photo-thermal and the conventional heat resource, so that the temperature difference loss is reduced, and the thermodynamic perfection is high.
(3) The photo-thermal and fuel/photo-thermal and conventional heat resources provide driving heat load links, the temperature difference loss is small, and the thermodynamic perfection is high.
(4) The fuel (especially low-grade fuel) or the conventional heat resource plays a larger role by means of photo-heat, and the utilization value of the high-temperature photo-heat converted into mechanical energy is obviously improved.
(5) The driving heat load realizes graded utilization in the single-working-medium combined cycle, obviously reduces irreversible loss of temperature difference, and has high heat-changing work efficiency and thermodynamic perfection.
(6) The fuel or the conventional heat resource can be used for or is beneficial to reducing the pressure boosting ratio of the combined cycle, improving the flow of the circulating working medium, and being beneficial to constructing a large-load photo-thermal type energy carrying and single-working-medium combined cycle steam power device.
(7) The utilization degree of the temperature difference in the back heating link between gases (steam) is high, and the heat-changing work efficiency is improved.
(8) And in the regenerative link between the gas (steam) working medium and the liquid working medium, the flow rate of the gas working medium is large, the temperature change interval is relatively narrow, the irreversible loss of the temperature difference is reduced, and the heat-variable work efficiency is improved.
(9) By utilizing the characteristics of working media, the temperature difference utilization level in the heat transfer process is obviously improved by adopting a simple technical means, and the heat efficiency is improved.
(10) And a plurality of heat regeneration technical means are provided, so that the coordination of the device in the aspects of power, thermal efficiency, step-up ratio and the like is effectively improved.
(11) The flow is reasonable, the structure is simple, and the scheme is rich; the method is beneficial to improving the reasonable utilization level of energy and expanding the application range of the photo-thermal type energy carrying and single-working-medium combined cycle steam power device.
Claims (9)
1. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with a heating furnace (8), the outside is also provided with an air channel which is communicated with the heating furnace (8) through a heat source regenerator (9), the heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator (9), the compressor (3) is also provided with a first steam channel which is communicated with a second expander (2) through the regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the heating furnace (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through a booster pump (4), the evaporator (7) is also provided with a steam channel which is communicated with the heating furnace (8), the heating furnace (8) is also provided with a steam channel which is communicated with the expander (1) through a solar heat collecting system (10), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the regenerator (5), and the evaporator (7) is also provided with a low-pressure steam channel which is divided into two paths, namely the first path is communicated with the compressor (3) and the second path is communicated with the condenser (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, the expander (1) is connected with the compressor (3) and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3) and the booster pump (4) and transmits power.
2. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator and a solar heat collection system; the outside is provided with a fuel channel which is communicated with a heating furnace (8), the outside is also provided with an air channel which is communicated with the heating furnace (8) through a heat source regenerator (9), the heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator (9), the compressor (3) is provided with a first steam channel which is communicated with a second expander (2) through the regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with an evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the heating furnace (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through a booster pump (4), the evaporator (7) is also provided with a steam channel which is communicated with the heating furnace (8), the heating furnace (8) is also provided with a steam channel which is communicated with the expander (1) through a solar heat collecting system (10), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) after the evaporator (7) is also communicated with the evaporator (5) by itself, and the low-pressure steam channel is also communicated with the evaporator (6) through two paths which are respectively communicated with the first evaporator (3) and the second path (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, the expander (1) is connected with the compressor (3) and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3) and the booster pump (4) and transmits power.
3. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collecting system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with a heating furnace (8), the outside is also provided with an air channel which is communicated with the heating furnace (8) through a heat source regenerator (9), the heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator (9), the compressor (3) is also provided with a first steam channel which is communicated with a second expander (2) through a regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with an evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the heating furnace (8) through a second regenerator (11), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through a booster pump (4), the evaporator (7) is also provided with a steam channel which is communicated with the heating furnace (8) through the second regenerator (11), the heating furnace (8) is also provided with a steam channel which is communicated with the expander (1) through a solar heat collection system (10), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the second regenerator (11) and the evaporator (7) is also communicated with the second regenerator (6), and the low-pressure steam channel (7) is also communicated with the second regenerator (3) through the second regenerator and the second regenerator (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, the expander (1) is connected with the compressor (3) and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3) and the booster pump (4) and transmits power.
4. The photo-thermal energy carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a heating furnace, a heat source heat regenerator, a solar heat collecting system and a second heat regenerator; the outside is provided with a fuel channel which is communicated with a heating furnace (8), the outside is also provided with an air channel which is communicated with the heating furnace (8) through a heat source regenerator (9), the heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the heat source regenerator (9), the compressor (3) is also provided with a first steam channel which is communicated with a second expander (2) through a regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with an evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the heating furnace (8) through a second regenerator (11), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through a booster pump (4), the evaporator (7) is also provided with a steam channel which is communicated with the heating furnace (8) through a second regenerator (11), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through a second regenerator (11), and the evaporator (7) is also provided with the low-pressure steam channel which is communicated with the second evaporator (7) through a second regenerator (11), and the evaporator (6) is also communicated with the second evaporator (3) through the low-pressure channel; the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, the expander (1) is connected with the compressor (3) and transmits power to form a photo-thermal energy carrying single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3) and the booster pump (4) and transmits power.
5. A photo-thermal type energy carrying and single-working-medium combined cycle steam power device is characterized in that a second booster pump and a low-temperature heat regenerator are added in any one of the photo-thermal type energy carrying and single-working-medium combined cycle steam power devices in claims 1-4, a condensate pipe line of a condenser (6) is communicated with the booster pump (4) and is adjusted to be communicated with the low-temperature heat regenerator (13) through the second booster pump (12), a steam extraction channel is additionally arranged in a compressor (3) and is communicated with the low-temperature heat regenerator (13), and the low-temperature heat regenerator (13) is communicated with the booster pump (4) through the condensate pipe line, so that the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
6. In the combined cycle steam power device with the single working medium, according to any one of the claims 1, 3 and 4, a second evaporator and a diffusion pipe are added, a low-pressure steam channel of a regenerator (5) is communicated with the evaporator (7) and is regulated to be communicated with the second evaporator (14) through the evaporator (7), the low-pressure steam channel of a second expander (2) is communicated with the evaporator (7) and is regulated to be communicated with the second evaporator (14) through the evaporator (7), the low-pressure steam channel of the evaporator (7) is communicated with the second evaporator (14) through the evaporator (7), the low-pressure steam channel of the second evaporator (14) is respectively communicated with the compressor (3) and the condenser (6), a condensate pipe of the condenser (6) is communicated with the evaporator (7) through a pressure boost pump (4) and is regulated to be communicated with the condenser (6) through the pressure boost pump (4) and is communicated with the second evaporator (14), and then the condensate pipe of the condenser (6) is communicated with the single working medium through the evaporator (14) through the pressure boost pump (4) and is communicated with the evaporator (14), and the single working medium is communicated with the evaporator (14) through the single working medium.
7. In the photo-thermal type energy carrying and single-working-medium combined cycle steam power device, a second evaporator and a diffuser pipe are added in the photo-thermal type energy carrying and single-working-medium combined cycle steam power device, the low-pressure steam channel of an expander (1) is communicated with the evaporator (7) and is adjusted to be communicated with the second evaporator (14) through the evaporator (7), the low-pressure steam channel of the second expander (2) is communicated with the evaporator (7) and is adjusted to be communicated with the second evaporator (2) through the evaporator (7), the low-pressure steam channel of the evaporator (7) is respectively communicated with the compressor (3) and the condenser (6) and is adjusted to be communicated with the second evaporator (14) through the low-pressure steam channel of the second evaporator (14), the condensate pipe of the condenser (6) is communicated with the second evaporator (14) through the booster pump (4) and is adjusted to be communicated with the condenser (6) through the condensate pipe (4) and the second evaporator (14), and the condensate pipe of the condenser (6) is communicated with the second evaporator (14) through the second evaporator (14) and the single-working-medium combined cycle steam power device is formed.
8. In the photo-thermal type energy carrying and single-working-medium combined cycle steam power device, an expansion speed increaser (A) is added and replaces an expansion machine (1), a second expansion speed increaser (B) is added and replaces a second expansion machine (2), a dual-energy compressor (C) is added and replaces a compressor (3), a newly added diffuser pipe (D) is added and replaces a booster pump (4), so that the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
9. The photo-thermal type energy carrying and single-working-medium combined cycle steam power device is characterized in that in any one of the photo-thermal type energy carrying and single-working-medium combined cycle steam power devices in claims 1-8, a fuel channel communicated with a heating furnace (8) from outside is omitted, a heat source regenerator (9) is omitted, an air channel communicated with the heating furnace (8) from outside through the heat source regenerator (9) is omitted, a fuel gas channel communicated with the outside through the heat source regenerator (9) from the heating furnace (8) is omitted, a heat source heat exchanger (16) is added to replace the heating furnace (8), the heat source heat exchanger (16) is also communicated with the outside through a heat source medium channel, and the photo-thermal type energy carrying and single-working-medium combined cycle steam power device is formed.
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