SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a solar photothermal-biomass power generation system to solve the technical problem that current power generation system can not compromise solar energy utilization efficiency and stability of electricity generation simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
a solar photo-thermal-biomass power generation system comprising: the device comprises a tower type photo-thermal module and a biomass module; wherein,
the tower type photo-thermal module comprises a heat collection tower, a first molten salt tank, a first heat exchanger, a second heat exchanger and a second molten salt tank which are sequentially connected in a loop manner, and a mirror field for collecting solar rays and reflecting the solar rays to the heat collection tower; the biomass module comprises a biomass boiler, a steam turbine, a cooling water tower, a waste heat utilization device and a steam drum which are sequentially connected in a loop;
the biomass boiler is connected with the first heat exchanger and the waste heat utilization device, and the steam drum is connected with the second heat exchanger.
Further, the first molten salt tank is connected with a first valley electricity utilization device, and the second molten salt tank is connected with a second valley electricity utilization device.
Further, heating devices are arranged in the first molten salt tank and the second molten salt tank.
Further, the heater is an electric heater.
Further, the first molten salt tank is a high-temperature molten salt tank, and the second molten salt tank is a low-temperature molten salt tank.
Further, the first heat exchanger is a high-temperature heat exchanger, and the second heat exchanger is a low-temperature heat exchanger.
Further, the heat collecting tower is also connected with the first heat exchanger and the second heat exchanger simultaneously.
Further, the biomass power generation module also comprises a steam treatment device for collecting water steam and supplying heat to the outside.
Further, the waste heat utilization device is connected with an exhaust gas treatment device.
Further, a water treatment device for supplementing water is connected between the waste heat utilization device and the cooling water tower.
The utility model provides a solar photothermal-biomass power generation system combines use tower solar thermal power generation and biomass power generation, and the fused salt in the fused salt jar is heated to the solar collecting tower utilization mirror field reflection's sunlight, and the fused salt can be directly used for heating and produce steam power generation, and unnecessary high temperature fused salt can be stored and be used for the electricity generation at night, is equipped with two fused salt jars, forms a fused salt circulation process, can be when illumination is sufficient, stores the high temperature fused salt and is used for the electricity generation of power consumption peak period at night to improve the generating efficiency; in addition, the tower type photo-thermal power generation does not need heat conduction oil, so that the energy loss caused by heat exchange between the molten salt and the heat conduction oil is reduced, and the potential danger that the molten salt and the heat conduction oil are combined together is eliminated. Meanwhile, the system comprises a multi-stage heat exchange device, namely a first heat exchanger is used for heating steam, the steam is directly generated or sent to a biomass boiler after the temperature of the steam is increased, a second heat exchanger is used for heating water or steam conveyed by a steam drum, the water is converted into the steam or the heated steam, the steam with a lower temperature is obtained and stored in the steam drum, and then the steam is heated through the biomass boiler or the first heat exchanger, so that a steam circulation process is formed, the generated superheated steam pushes a steam turbine to generate electricity, and the biomass boiler can be combined with the processed straws, municipal refuse and biogas generated by excrement of a large farm and used for heating to generate the superheated steam. Therefore, in the solar photo-thermal-biomass power generation system, the tower photo-thermal power generation temperature is higher, when the illumination is good, the generated steam can directly generate power, when the illumination is poor, if the generated steam has low direct power generation efficiency, the steam can be sent into a biomass boiler to be overheated and heated, and then power is generated after the requirement is met, namely photo-thermal power generation and biomass power generation are combined with fused salt heat storage and peak regulation, so that multiple energy complementation is realized, and the stability and the power generation efficiency of solar photo-thermal and biomass energy power generation can be obviously enhanced.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality or more" means two or more unless specifically limited otherwise.
Referring to fig. 1, a solar photo-thermal biomass power generation system according to an embodiment of the present invention will be described. The solar photo-thermal-biomass power generation system comprises: the solar photovoltaic power generation system comprises a tower type photo-thermal power generation module 1 and a biomass power generation module 2; the tower type photo-thermal power generation module 1 comprises a heat collection tower 12, a first molten salt tank 13, a first heat exchanger 14, a second heat exchanger 15 and a second molten salt tank 16 which are sequentially connected in a loop manner, and a mirror field 11 for gathering solar rays and reflecting the solar rays to the heat collection tower 12; the biomass power generation module 2 comprises a biomass boiler 21, a steam turbine 22, a cooling water tower 24, a waste heat utilization device 26 and a steam drum 27 which are connected in sequence in a loop; the biomass boiler 21 is connected with the first heat exchanger 14 and the waste heat utilization device 26, and the steam drum 27 is connected with the second heat exchanger 25.
The embodiment of the utility model provides an above-mentioned solar photothermal-biomass power generation system uses tower solar thermal power generation and biomass power generation jointly, and heat collecting tower 12 utilizes the sunlight heating fused salt in the fused salt jar of mirror field 11 reflection, and the fused salt can be directly used for heating and produce steam power generation, and unnecessary high temperature fused salt can be stored and be used for the electricity generation at night, is equipped with two fused salt jars, forms a fused salt circulation process, can when illumination is sufficient, stores high temperature fused salt and is used for the electricity generation of power consumption peak period at night to improve generating efficiency; in addition, the tower type photo-thermal power generation does not need heat conduction oil, so that the energy loss caused by heat exchange between the molten salt and the heat conduction oil is reduced, and the potential danger that the molten salt and the heat conduction oil are combined together is eliminated. Meanwhile, the system comprises a multi-stage heat exchange device, namely the first heat exchanger 14 is used for heating steam, the steam is directly generated or sent to the biomass boiler 21 after the temperature of the steam is increased, the second heat exchanger 15 is used for heating water or steam sent by the steam drum 27, the water is converted into the steam or the heating steam, the steam with the lower temperature is obtained and stored in the steam drum 27, then the steam is heated through the biomass boiler 21 or the first heat exchanger 14, a steam circulation process is formed, the generated superheated steam pushes the steam turbine 22 to generate electricity, and the biomass boiler 21 can be combined with the processed straws, municipal waste and biogas generated by excrement of a large farm to generate the superheated steam through heating. Therefore, in the solar photo-thermal-biomass power generation system, the tower photo-thermal power generation temperature is higher, when the illumination is good, the generated steam can directly generate power, when the illumination is poor, if the generated steam has low direct power generation efficiency, the steam can be sent into the biomass boiler 21 to be overheated and heated, and then power is generated after the requirement is met, namely the photo-thermal power generation and the biomass power generation are combined with the fused salt heat storage and peak regulation, so that the multi-energy complementation is realized, and the stability and the power generation efficiency of the solar photo-thermal power generation and the biomass energy power generation can be obviously enhanced.
Further, as a specific embodiment of the solar photothermal-biomass power generation system provided by the present invention, the first molten salt tank 13 is connected with the first valley electricity utilization device 17, and the second molten salt tank 16 is connected with the second valley electricity utilization device 18. When illumination is sufficient, the system can utilize high-temperature molten salt to store energy for power generation at night in the peak period of electricity, and the two valley electricity utilization devices can more effectively improve the energy utilization efficiency.
Further, as a specific embodiment of the solar photo-thermal biomass power generation system provided by the present invention, heating devices (not labeled in the figures) are disposed in the first molten salt tank 13 and the second molten salt tank 16. This two molten salt jars all are equipped with heating device, and the valley electricity of cheap when usable midnight electricity utilization valley heats, then the electricity generation of reuse in the peak period, like this, not only guarantee the good running state of fused salt, more can effectively improve the effect of energy storage peak regulation, further promote the intellectuality of electric wire netting. Further, the heater is an electric heater.
Further, as the utility model provides a solar photothermal-biomass power generation system's a specific implementation mode, first molten salt jar 13 is the high temperature molten salt jar, and second molten salt jar 16 is the low temperature molten salt jar. The high-temperature molten salt tank and the low-temperature molten salt tank are arranged, so that the high-temperature molten salt tank can adapt to various conditions of sufficient or insufficient illumination, can more effectively store high-temperature molten salt, and is used for power generation at night in a power peak period.
In addition, the electric heater in the high-temperature molten salt tank is mainly used for energy storage and heating, the electric heater in the low-temperature molten salt tank is mainly used for preventing molten salt from being solidified due to heat loss caused by heat conduction, convection, heat radiation and the like at the tank bottom, the tank wall, the tank top and the like in long-term operation, the electric heater needs to ensure that the temperature in the tank body is maintained above minus 20 ℃, and the side face of the electric heater is arranged in a space of the tank wall within 1m away from the tank bottom and is provided with a jacket so as to be beneficial to maintenance. 4 100KW electric heaters are arranged in the low-temperature molten salt tank, so that the temperature balance in the whole salt tank is ensured and is higher than-20 ℃, and the molten salt is prevented from being solidified.
Further, as the utility model provides a solar photothermal-biomass power generation system's a specific implementation, first heat exchanger 14 is high temperature heat exchanger, and second heat exchanger 15 is low temperature heat exchanger. The high temperature heat exchanger is connected with the high temperature molten salt tank, and the low temperature heat exchanger is connected with the low temperature molten salt tank, so that a steam circulation process can be better formed, and superheated steam is formed for the biomass boiler 21. Further, the first heat exchanger 14 and the second heat exchanger 15 are fixed tube plate heat exchangers. The fixed tube-plate heat exchanger exchanges heat through the tube plate, and the heat exchange effect is better.
Further, as a specific embodiment of the solar photo-thermal biomass power generation system provided by the present invention, the heat collecting tower 12 is also connected to the first heat exchanger 14 and the second heat exchanger 15 at the same time. When the illumination is insufficient or the biomass energy is insufficient to maintain high-quality power generation in winter, the system can stop power generation according to the current order, and the collected solar energy directly passes through the heat exchanger to supply heat to the city, so that the energy can be more effectively utilized.
Further, as a specific embodiment of the solar photo-thermal biomass power generation system provided by the present invention, the biomass power generation module 2 further includes a steam processing device 23 for collecting steam and supplying heat to the outside. By using the steam treatment device 23, the energy can be fully turned to city heat supply, and the utilization rate of the energy can be further improved. The steam treatment device 23 can be connected to the first heat exchanger 13, the biomass boiler 21 and the steam turbine 22 in order to make full use of the steam produced by these devices.
Further, as a specific embodiment of the solar photo-thermal biomass power generation system provided by the present invention, the waste heat utilization device 26 is connected to a waste gas treatment device 28. In the system, the waste gas can be used for preheating water and air used by the biomass boiler 21, and the waste heat utilization device 26 can fully utilize waste heat to prevent loss; however, the exhaust gas from the biomass boiler 21 is exhausted after being strictly treated by the exhaust gas treatment device 28, so that air pollution can be prevented, and an environmental protection effect can be further achieved.
Further, as a specific embodiment of the solar photo-thermal biomass power generation system provided by the present invention, a water treatment device 25 for water supply is further connected between the waste heat utilization device 26 and the cooling water tower 24. After the system works for a long time, certain moisture loss exists, the water treatment device 25 is used for replenishing water to the system, the power generation system can be prevented from stopping working due to water shortage, and the power generation stability of the system is further improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.