CN201730779U - System combining solar solar thermal generation and biomass electricity generation - Google Patents
System combining solar solar thermal generation and biomass electricity generation Download PDFInfo
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- CN201730779U CN201730779U CN2010202038689U CN201020203868U CN201730779U CN 201730779 U CN201730779 U CN 201730779U CN 2010202038689 U CN2010202038689 U CN 2010202038689U CN 201020203868 U CN201020203868 U CN 201020203868U CN 201730779 U CN201730779 U CN 201730779U
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Abstract
The utility model relates to a system combining solar solar thermal generation and biomass electricity generation, which is characterized in that the system comprises a solar heat collecting system, a molten salt heat storage system, a biomass combustion system, a thermoelectric conversion system and a control system, wherein the solar heat collecting system comprises a heat collecting field, a solar superheater, a steam generator, a preheater and an oil pump. The molten salt heat storage system comprises a heat exchanger, a molten salt cold tank and a molten salt hot tank. A biomass boiler of the biomass combustion system mainly comprises a water cooling wall, a steam pocket, a steam-water separator and a superheater, and the thermoelectric conversion system comprises a steam turbine, a generator and a converting station. The system combining solar solar thermal generation and biomass electricity generation heats water into 360-380 DEG C superheated steam through a solar system and then heats to 535-545 DEG C through the biomass combustion system to supply to the steam turbine, thereby driving the generator to complete generating process. When receiving power to adjust valleys, the system combining solar solar thermal generation and biomass electricity generation can secondarily store energy for the molten salt heat storage system through using self generation. When at night or the solar conditions are not well, the system combining solar solar thermal generation and biomass electricity generation releases heat energy which is stored in molten salt through a heat exchanger to generate.
Description
Technical field
The utility model relates to a kind of power generation system, particularly about a kind of system that solar energy thermal-power-generating is combined with biomass power generation.
Background technique
Solar energy thermal-power-generating and biomass power generation are that two kinds of important renewable energy are utilized mode, are subjected to countries in the world energy research personnel and pay close attention to.Wherein:
Solar energy thermal-power-generating is to utilize heat collector to convert solar radiant energy to heat energy and generate electricity by thermodynamic cycle process.According to the difference of optically focused mode, solar heat power generation system roughly is divided three classes: groove type line-focusing system, tower system and dish formula system.The commercialization of trough type solar power generation system is the most successful at present, but its light concentrating times is lower, the steam temperature that produces generally is no more than 400 ℃, therefore cause system can only adopt the saturated vapour generating, generating efficiency is lower, and unit can only adopt special-purpose saturated steam turbine, and unit costs an arm and a leg, the rate of fault height; Secondly, because the seasonal variation of solar energy resources is big, overcast and rainy factor such as can't generate electricity continuously, cause the system equipment utilization ratio lower.
Biomass power generation is to carry out heat by crops stem stalk such as burning corn, wheat or the heating steam of forest branch to generate electricity.According to statistics, the calorific value of biomass straw per ton is equivalent to standard coal 50% approximately, and average sulphur content has only 3.8 ‰, and in the regeneration process of biomass straw, the CO of discharging
2The CO that absorbs when regenerating with biomass straw
2Reach Carbon balance, have CO
2The effect of zero-emission.Biomass straw is purchased management easily, belongs to waste and utilizes, and the soot emissions that cause if utilize its generating not only to help reducing the biomass burning stalk also help improving peasant's income.But because the calorific value of living beings own is lower, though adopt single biomass fermentation electric system can guarantee generating in 24 hours, the raw material consumption is huge, and its source and storage occupation of land all have some problems.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides a kind of system that solar energy thermal-power-generating is combined with biomass power generation.
For achieving the above object, the utility model is taked following technological scheme: a kind of system that solar energy thermal-power-generating is combined with biomass power generation is characterized in that: it comprises solar thermal collection system, fused salt heat reservoir, biomass combustion system, thermoelectric conversion system and control system; Described solar thermal collection system comprises the heat collecting field that adopts the groove type line-focusing system, the be linked in sequence heat conductive oil inlet pipeline of solar energy superheater, steam generator, preheater, high temperature oil pump and heat collecting field of the conduction oil export pipeline of described heat collecting field, the heat exchanging tube of described solar energy superheater, steam generator and preheater is connected in series; Described fused salt heat reservoir comprises a heat exchanger, described heat exchanger connects cold jar an of fused salt and fused salt heat jar respectively by pipeline, heat exchanging tube one end of described heat exchanger connects the conduction oil export pipeline of described heat collecting field, and the other end is connected across the inlet/outlet two ends of described high temperature oil pump by another three-way valve; Described biomass combustion system comprises a living beings boiler, the water cooled furnace wall steam ouput of described biomass boiler connects a drum and a steam separator successively, the superheater in the described biomass boiler burner hearth is passed in the outlet of the steam ouput of described steam separator and described solar energy superheater heat exchanging tube after in parallel by pipeline, connect the steam turbine steam inlet of described thermoelectric conversion system; It is 535 ℃ that the described steam turbine of described thermoelectric conversion system adopts the inlet steam temperature, pressure is the high parameter single casing steam turbine of 8.38MPa, the mechanical output terminal of described steam turbine connects a generator, and the electricity that described generator sends is sent into public electric wire net after sending into an electric substation; Two rising pipes of described steam turbine bottom, one the tunnel connects a low-pressure heater and a water pump successively, and another road connects the heat exchanging tube import of preheater of heat exchanging tube, an oxygen-eliminating device, another water pump and the described solar thermal collection system of a vapour condenser, described water pump, a low-pressure heater successively.
Pipeline between the heat exchanger of described fused salt heat reservoir and the fused salt heat jar is provided with an electric heater, and described electric heater connects the output terminal of described thermoelectric conversion system self power generation.
In the flue gas channel of described biomass boiler, be provided with province's coal gas, on the pipeline between described oxygen-eliminating device and the described superheater, a three-way valve is set, the 3rd mouth of described three-way valve connects a pipeline, and described pipeline connects described drum after passing described province coal gas.
Be provided with an air preheater in the flue gas channel in described biomass boiler, the gas piping one end connection in the described air preheater is provided with source of compressed air, and the other end connects the fuel inlet of described biomass boiler.
On the heat conductive tube between described superheater and the described high temperature oil pump, be connected an expansion drum.
Described biomass boiler adopts ∏ shape water-cooled vibrating grate boiler.
The utility model is owing to take above technological scheme, it has the following advantages: 1, the utility model is because after at first adopting the comparatively ripe groove type solar collecting system of technology that water is heated to 360 ℃～380 ℃ formation superheated vapors, resupply biomass boiler and continue to be heated to 535 ℃～545 ℃, therefore not only can make full use of this inexhaustible clean energy resource of solar energy, and can greatly save the consumption of biomass fuel.2, the utility model utilizes the characteristic that biomass boiler can continue to generate electricity, it is limited and can not be in the problem of night and overcast and rainy long-time generating to have solved the solar energy thermal-power-generating stored energy capacitance, not only make the utility model system guarantee power supply continuously in 24 hours, and can participate in the operation of the peak regulation accent paddy of electrical network.3, the utility model is owing to utilize biomass boiler that about 380 ℃ the superheated vapor that conventional solar thermal collection system provided is heated to about 540 ℃, therefore can adopt the steam turbine generator of the high parameter of prior art, and needn't be equipped with special-purpose saturated steam turbine for solar heat power generation system, not only reduce the purchase cost of steam turbine, also improved generating efficiency.Particularly advocate energetically and remove little fired power generating unit, under the situation of the Generator Set that starts, more can make full use of the steam turbine of removing, purchase new equipment and needn't invest separately in present country.4, the utility model is owing to be provided with an electric heater in the fused salt heat reservoir, therefore when night, system accepted electric power accent paddy, system's self power generation can be introduced electric heater fused salt is heated energy storage, so both can guarantee the flame-out steady combustion state of minimum of keeping of biomass boiler, can carry out secondary energy storage for the fused salt heat reservoir again, guarantee to begin in second day generating and solar thermal collection system heat when not enough, the heat energy that is stored by fused salt provides heat for system.The utility model combines solar energy thermal-power-generating and these two kinds of important renewable energy modes of biomass power generation; not only improved generating efficiency effectively; and protected environment well, it can be widely used in the various generating occasions of solar radiation condition and biomass fuel resource preferably that have.
Description of drawings
Fig. 1 is the utility model combines solar energy thermal-power-generating with biomass power generation an electric power station system structural representation
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1, the utility model mainly comprises solar thermal collection system 1, fused salt heat reservoir 2, biomass combustion system 3, thermoelectric conversion system 4 and control system.
Solar thermal collection system 1 of the present utility model mainly comprises heat collecting field 11, solar energy superheater 12, steam generator 13, preheater 14, high temperature oil pump 15 and expansion drum 16.Serial or parallel connection is provided with a plurality of thermal-arrests unit in the heat collecting field 11 of the present utility model, and the groove type line-focusing system class in each thermal-arrest unit and the prior art seemingly comprises equipment (not shown)s such as parabolic slot type reflector, sun tracker and heat collecting pipe.Place in the sun tracker north-south, adopts the uniaxiality tracking mode to follow the tracks of the sun, and solar beam accumulates on each heat collecting pipe through the slot type mirror reflects, with the conduction oil in the heating heat collecting pipe.The conduction oil export pipeline 17 of heat collecting field 11 be connected in series successively solar energy superheater 12, steam generator 13, preheater 14, high temperature oil pump 15, and get back to heat collecting field 11 by heat conductive oil inlet pipeline 18, expansion drum 16 is connected on the pipeline between preheater 14 and the high temperature oil pump 15.Heat exchanging tube in solar energy superheater 12, steam generator 13 and the preheater 14 is connected in series, the heat exchanging tube water inlet of preheater 14 1 ends, and the heat exchanging tube of solar energy superheater 12 1 ends goes out superheated vapor.
Fused salt heat reservoir 2 of the present utility model mainly comprises cold jar 21 of fused salt, fused salt heat jar 22 and heat exchanger 23.Cold jar 21 of the utility model fused salt, fused salt heat jar 22 and heat exchanger 23 are similar with the fused salt heat reservoir in the prior art, the fused salt of its stored can be nitric acid fused salt or other medium, heat exchanger 23 is communicated with cold jar 21 of fused salt and fused salt heat jar 22 respectively by two pipelines 24,25, one end of the heat exchanging tube 26 of heat exchanger 23 connects on the conduction oil export pipeline 17 of solar thermal collection system 1 by a three-way valve 27, and the other end is crossed over by another three-way valve 28 and is connected on the heat conductive oil inlet pipeline 18 at high temperature oil pump 15 two ends.The utility model also is provided with an electric heater 29 at heat exchanger 23 on the pipeline 25 of fused salt heat jar 22.
Biomass combustion of the present utility model system 3 mainly comprises biomass boiler 31, and biomass boiler 31 can adopt the ∏ shape water-cooled vibrating grate boiler in the prior art, also can adopt the boiler of other structural type.Be provided with superheater 32 in the burner hearth, in the flue gas channel of biomass boiler 31, be provided with an economizer 33 and an air preheater 34.The inwall of biomass boiler 31 is a water cooled furnace wall, the top of water cooled furnace wall connects a drum 35, the inlet of drum 35 connects a pipeline, after this pipeline passes economizer 33 as the heat exchanging tube of economizer 33, is connected to the heat exchanging tube entrance point of solar thermal collection system 1 preheater 14 by a three-way valve 36; The outlet of drum 35 connects a steam-water separator 37, and the heat exchanging tube outlet of the outlet of steam-water separator 37 and solar energy superheater 12 is in parallel, enter superheater 32 after, steam turbine 41 steam inlets of connection thermoelectric conversion system 4 are as the driving force of steamer 41 machines.Gas piping one ends in the air preheater 34 connect the source of compressed air that is arranged on the system outside, and the other end connects fuel inlet 38 places of biomass boiler 31, send into the burner hearth internal combustion of boiler with fuel.
In the thermoelectric conversion system 4 of the present utility model, the inlet steam temperature is 535 ℃ in the steam turbine 41 employing prior arts, pressure is the high parameter single casing steam turbine of 8.38MPa, and the equipment of generator 42 and electric substation 43 also all adopts relevant device and the programmed sequence of operations in the prior art.The electricity that generator 42 sends leads up to electric substation 43 to send into public electric wire net 44, and another road connects electric heater 29.In addition, water outlet in steam turbine 41 bottoms is arranged in parallel three pipelines, wherein the first via connects a vapour condenser 45, the heat exchanging tube of vapour condenser 45 connects low-temperature receiver, vapour condenser 45 outlets connect a water pump 46, the outlet of water pump 46 is by the heat exchanging tube of pipeline connection low-pressure heater 47, and the outlet of heat exchanging tube connects oxygen-eliminating device 48; The second the tunnel connects the cavity import of a low-pressure heater 47, and the cavity outlet of low-pressure heater 47 is connected to the inlet of water pump 46 by pipeline; Third Road connects another import of oxygen-eliminating device 48.Oxygen-eliminating device 48 outlets are connected to three-way valve 36 by a water pump 49.
Control system of the present utility model is mainly used in the operation of coordinating solar thermal collection system 1, fused salt heat reservoir 2, biomass combustion system 3, thermoelectric conversion system 4.Concrete control system technician can carry out conventional design as requested, does not repeat them here.
The utility model combines solar heat power generation system with the biomass fermentation electric system, comprise following state during operation:
When (1) generate electricity daytime (fine day), via solar energy superheater 12, steam generator 13 and preheater 14 water of reverse flow is heated up by high temperature oil pump 15, one road conduction oil at the heated conduction oil of heat collecting field and become the superheated vapor of 360～380 ℃ (generally getting 380 ℃); When solar radiation is higher than setting value (prior art), control another road conduction oil by 23 pairs of fused salt heating of heat exchanger, at this moment, cold jar of pump for liquid salts 51 pumps into fused salt heat jar 22 with fused salt for cold jar 21 from fused salt, carry out the energy storage, the conduction oil between three-way valve 27 and the three-way valve 28 in the heat exchanging tube 26 is to flow to three-way valve 28 from three-way valve 27.
Heated water in the water cooled furnace wall of the biomass boiler 31 of biomass combustion system 3, can become steam and enter drum 35 again after steam separator 37 separates, the superheater 32 that enters in the biomass boiler 31 with the superheated vapor that flows out from solar energy superheater 12 heats, heat up and form the superheated vapor of 535～545 ℃ (generally getting 540 ℃), these high temperature and high pressure steams are sent into the steam turbine 41 of thermoelectric conversion system 4 through piping, drive generator 42 and finish power generation process, the electric weight that sends is sent into public electric wire net 44 after electric substation 43.Water in the drum 35 can flow back to the water cooled furnace wall of biomass boiler 31 by pipeline; Be arranged on the interior air preheater 34 of flue gas channel of biomass boiler 31, after the cool air preheating with the outside input, send into the burner hearth internal combustion with fuel.
In thermoelectric conversion system 4, the first via steam of steam turbine 41 outlets flows into vapour condenser 45, be condensed into behind the water and flow into oxygen-eliminating device 48 after entering the heat exchanging tube of low-pressure heater 47 by a water pump 46, the water that flows out from oxygen-eliminating device 48 is behind water pump 49 and three-way valve 36, one the tunnel enters the preheater 14 of solar thermal collection system 1, another road enters the economizer 33 in the biomass boiler 31, sends drum 35 back to after utilizing the waste heat heating in the flue gas channel; The second road vapor stream of steam turbine 41 outlet crosses that the cavity of low-pressure heater 47 is laggard goes into water pump 46; The Third Road steam of steam turbine 41 outlets enters oxygen-eliminating device 45, for the water in the oxygen-eliminating device 45 of flowing through carries out deoxygenation.
When (2) generate electricity night, pipeline in the closure set thermal field 11, heat jar pump for liquid salts 52 is with fused salt cold jar 21 of blowback fused salt from fused salt heat jar 22, carrying out energy discharges, fused salt in the heat exchanger 23 is the heat-conducting oil heating in the heat exchanging tube, and conduction oil carries out heat exchange by solar energy superheater 12, steam generator 13, preheater 14 with steam or water.At this moment, the conduction oil in the heat exchanging tube 26 is to flow to three-way valve 27 from three-way valve 28 between three-way valve 27 and the three-way valve 28.
When (3) rainy weather generated electricity continuously, solar thermal collection system 1 and fused salt heat reservoir 2 quit work, and only depend on biomass combustion system 3 to provide hot steam for thermoelectric conversion system 4 separately.
When the utility model is accepted electric power night and is transferred paddy, biomass boiler 31 will be kept minimum steady combustion state, can utilize self power generation of the present utility model to be the 29 power supply heating fused salts of the electric heater in the fused salt heat reservoir 2, and start cold jar pump for liquid salts 51 and make fused salt flow to fused salt heat jars 22 for cold jar 21 from fused salt, for fused salt heat jars 22 is carried out secondary energy storage; When recovering when public electric wire net 44 is powered, to close electric heater and cold jar of pump for liquid salts 51 again, open heat jar pump for liquid salts 52 and discharge by the heat energy of heat exchanger 23 with fused salt heat jar 22.
The various embodiments described above only are used to illustrate the utility model; wherein the structure of each parts, Placement etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement all should not got rid of outside protection domain of the present utility model.
Claims (11)
1. system that solar energy thermal-power-generating is combined with biomass power generation, it is characterized in that: it comprises solar thermal collection system, fused salt heat reservoir, biomass combustion system, thermoelectric conversion system and control system;
Described solar thermal collection system comprises the heat collecting field that adopts the groove type line-focusing system, the be linked in sequence heat conductive oil inlet pipeline of solar energy superheater, steam generator, preheater, high temperature oil pump and heat collecting field of the conduction oil export pipeline of described heat collecting field, the heat exchanging tube of described solar energy superheater, steam generator and preheater is connected in series;
Described fused salt heat reservoir comprises a heat exchanger, described heat exchanger connects cold jar an of fused salt and fused salt heat jar respectively by pipeline, heat exchanging tube one end of described heat exchanger connects the conduction oil export pipeline of described heat collecting field, and the other end is connected across the inlet/outlet two ends of described high temperature oil pump by another three-way valve;
Described biomass combustion system comprises a living beings boiler, the water cooled furnace wall steam ouput of described biomass boiler connects a drum and a steam-water separator successively, the superheater in the described biomass boiler burner hearth is passed in the outlet of the steam ouput of described steam separator and described solar energy superheater heat exchanging tube after in parallel by pipeline, connect the steam turbine steam inlet of described thermoelectric conversion system;
It is 535 ℃ that the described steam turbine of described thermoelectric conversion system adopts the inlet steam temperature, pressure is the high parameter single casing steam turbine of 8.38MPa, the mechanical output terminal of described steam turbine connects a generator, and the electricity that described generator sends is sent into public electric wire net after sending into an electric substation; Two rising pipes of described steam turbine bottom, one the tunnel connects a low-pressure heater and a water pump successively, and another road connects the heat exchanging tube import of preheater of heat exchanging tube, an oxygen-eliminating device, another water pump and the described solar thermal collection system of a vapour condenser, described water pump, a low-pressure heater successively.
2. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 1, it is characterized in that: the pipeline between the heat exchanger of described fused salt heat reservoir and the fused salt heat jar is provided with an electric heater, and described electric heater connects the output terminal of described thermoelectric conversion system self power generation.
3. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 1, it is characterized in that: in the flue gas channel of described biomass boiler, be provided with an economizer, on the pipeline between described oxygen-eliminating device and the described superheater, a three-way valve is set, the 3rd mouth of described three-way valve connects a pipeline, and described pipeline connects described drum after passing described economizer.
4. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 2, it is characterized in that: in the flue gas channel of described biomass boiler, be provided with an economizer, on the pipeline between described oxygen-eliminating device and the described superheater, a three-way valve is set, the 3rd mouth of described three-way valve connects a pipeline, and described pipeline connects described drum after passing described economizer.
5. as claim 1 or 2 or 3 or 4 described a kind of systems that solar energy thermal-power-generating is combined with biomass power generation, it is characterized in that: be provided with an air preheater in the flue gas channel in described biomass boiler, gas piping one end connection in the described air preheater is provided with source of compressed air, and the other end connects the fuel inlet of described biomass boiler.
6. as claim 1 or 2 or 3 or 4 described a kind of systems that solar energy thermal-power-generating is combined with biomass power generation, it is characterized in that: on the heat conductive tube between described superheater and the described high temperature oil pump, be connected an expansion drum.
7. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 5 is characterized in that: be connected an expansion drum on the heat conductive tube between described superheater and the described high temperature oil pump.
8. as claim 1 or 2 or 3 or 4 described a kind of systems that solar energy thermal-power-generating is combined with biomass power generation, it is characterized in that: described biomass boiler adopts ∏ shape water-cooled vibrating grate boiler.
9. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 5 is characterized in that: described biomass boiler adopts ∏ shape water-cooled vibrating grate boiler.
10. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 6 is characterized in that: described biomass boiler adopts ∏ shape water-cooled vibrating grate boiler.
11. a kind of system that solar energy thermal-power-generating is combined with biomass power generation as claimed in claim 7 is characterized in that: described biomass boiler adopts ∏ shape water-cooled vibrating grate boiler.
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Cited By (18)
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| CN101876299A (en) * | 2010-05-24 | 2010-11-03 | 北京京仪仪器仪表研究总院有限公司 | Method and system for combing solar energy thermal power generation with biomass power generation |
| CN101949369A (en) * | 2010-07-27 | 2011-01-19 | 昆明理工大学 | Low temperature solar energy-biomass energy combined heat and power system |
| CN102305199A (en) * | 2011-07-20 | 2012-01-04 | 徐添贵 | Solar power generator and continuous solar power generation method |
| CN102734940A (en) * | 2011-04-11 | 2012-10-17 | 株式会社日立制作所 | Solar boiler system |
| CN102817657A (en) * | 2012-09-12 | 2012-12-12 | 重庆大学 | Heat pipe technology based organic Rankine cycle low-temperature exhaust heat power generating system |
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| CN104160117A (en) * | 2012-02-15 | 2014-11-19 | 法尔克可再生股份公司 | Plant and method for increasing the efficiency of electric energy production |
| CN105065218A (en) * | 2015-09-02 | 2015-11-18 | 北京工业大学 | Multi-stage single-screw line-focusing solar heat and electricity co-generation system integrating fused salt heat storage |
| CN105804813A (en) * | 2016-05-17 | 2016-07-27 | 国网安徽省电力公司芜湖供电公司 | Method for improving energy storage efficiency of compressed air energy storage system |
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| CN105804813A (en) * | 2016-05-17 | 2016-07-27 | 国网安徽省电力公司芜湖供电公司 | Method for improving energy storage efficiency of compressed air energy storage system |
| CN106152109A (en) * | 2016-06-16 | 2016-11-23 | 赖正平 | The device of gas fuel fused salt integrated boiler thermal release material |
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