A kind of energy storage type solar steam boiler adopting Molten Salt Heat Transfer heat accumulation
Technical field
The utility model relates to solar utilization technique, particularly a kind of energy storage type solar steam boiler adopting Molten Salt Heat Transfer heat accumulation.
Background technology
In technical field of solar utilization technique, do not see that can select according to varying environment can not mode of heating at present, good in economic efficiency, environmental protection and energy saving, and drop into and solar energy steam boiler that operating cost is low.Along with energy scarcity, how effective exploitation utilizes solar energy, becomes the problem thought and expect to solve always.
Utility model content
The blank that the utility model exists according to above-mentioned field and demand, the utility model provides a kind of energy storage type solar steam boiler adopting Molten Salt Heat Transfer heat accumulation, and can ensure in different environments to continue to provide steam, technical scheme is as follows:
Adopt an energy storage type solar steam boiler for Molten Salt Heat Transfer heat accumulation, it is characterized in that:
Comprise heat transfer heat-storage medium carrier pipe, heating plant, high temperature melting salt cellar, output device and low-temperature molten salt tank; Described heat transfer medium conveyance conduit is return capable of circulation, and successively with heating plant, high temperature melting salt cellar, output device connect, and is communicated with described low-temperature molten salt tank inside;
Heat transfer medium in described heat transfer medium conveyance conduit and the heat-storage medium in high temperature melting salt cellar are composite fused salt;
Described heating plant is for collecting solar energy with the heat transfer medium in heat transfer medium conveyance conduit;
Described heat transfer medium conveyance conduit is provided with circulating pump, and described circulating pump is used for providing power for institute's heat transfer medium circulates in described heat transfer medium carrier pipe way;
Heat transfer medium in described heat transfer medium conveyance conduit absorbs heat successively from heating plant, then to high temperature melting salt cellar, output device heat release, a part of heat is stored in high temperature melting salt cellar, part heat heated the water flowed through in output device, and the heat transfer medium after release heat energy flows in described low-temperature molten salt tank; Heat transfer medium in low-temperature molten salt tank starts next recuperated cycle flow back into described heating plant under the power of circulating pump after;
Described output device comprises the steam generator and preheater that are connected successively by described heat transfer medium conveyance conduit; Under using state, heat transfer medium enters described preheater after steam generator flows out, and finally gets back in heating plant or heat transfer medium buffer container; Described steam generator is for becoming water vapour by the hot water heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described preheater is used for providing hot water to described steam generator; The heat of described preheater preheats hot water partly or entirely derives from the waste heat in the heat transfer medium flowed through.
In steam boiler in the utility model, heating plant is for assembling solar energy as thermal source, energy-conserving and environment-protective.The solar energy that heat transfer unit (HTU) absorbs according to different environmental requirements, can select different mode of heatings.In boiler, a high temperature melting salt cellar is provided with in the downstream of heating plant, the heat energy that the illumination good period is collected can partly be stored in high temperature melting salt cellar, preheating water to be heated in part circulating-heating output device is to export steam, heat transfer medium after heat release is got back in low-temperature molten salt tank, the period that illumination is good, the heat transfer medium reclaimed in low-temperature molten salt tank is pumped to heating plant position and described heating plant carries out heat exchange heat absorption.The period that illumination is bad, under the power of circulating pump, the heat-storage medium in high temperature melting salt cellar is sent to output device heating produces steam.In the utility model, adopting heat transfer/storage media is composite fused salt, has thermal conductivity factor good, the focus that storage density is large, both be applicable to heat transfer and be also applicable to heat accumulation, serviceability temperature is high, and efficiency is high, the output steam that also can continue when not having sunlight can be ensured, good in economic efficiency, environmental protection and energy saving.
Described heating plant is selected from slot type, tower, linear Fresnel formula employing solar light-heat power-generation gathering solar device.
Heat transfer medium conveyance conduit between described heating plant to described high temperature melting salt cellar is provided with valve 1;
The nearly heating plant one end of heat transfer medium conveyance conduit between described low-temperature molten salt tank and described heating plant is provided with valve 2.For closing/opening the closed circuit that heat transfer medium conveyance conduit is formed.
Further, also be provided with one section and can avoid valve 2, described heat transfer medium is also delivered directly to cold heat transfer media conveyance conduit with described high-temperature molten salt tank connected heat transfer medium conveyance conduit from described low-temperature molten salt tank by heating plant and valve 1, and described cold heat transfer media conveyance conduit is provided with valve 3.This pipeline arranges valve 3 so that open and close.Valve-off 3 when illumination is good, illumination difference or night Open valve 3 to utilize the heat of the storage in high-temperature molten salt tank.
Described heat transfer heat-storage medium is preferred quartz sand composite fused salt in quartz sand composite fused salt the utility model, sees number of patent application 201310732738.2,201310040070.5, quartz sand composite fused salt described in 201310040909.5.There is the advantage reducing fused salt use cost.Those skilled in the art also can adopt the fused salt with approximate characteristic having and report in prior art as heat transfer heat-storage medium.
In above-mentioned arbitrary boiler, described preheater is also connected with oxygen-eliminating device.For except oxygen contained in anhydrating, ensure feed water quality, make the pipeline of boiler flow passage component and heat-exchange system and equipment from corrosion, increase the service life.
To sum up, the utility model has the advantage of following several respects:
1. the utility model adopts the heat that provides of solar energy assembled as thermal source, energy-conserving and environment-protective.Three kinds of modes can be adopted to provide thermal source: slot type, Jing Chang that is tower, linear Fresnel formula solar light-heat power-generation mode assemble solar energy.According to different environmental requirements, different mode of heatings can be selected.
2. the utility model utilizes Molten Salt Heat Transfer heat accumulation, and fused salt serviceability temperature is high, and efficiency is high, good in economic efficiency, environmental protection and energy saving.The composite fused salt that heat accumulating preferably utilizes our company to invent, thermal conductivity factor is good, and storage density is large.
3. the utility model utilizes two tank to carry out heat accumulation, ensureing the confession steam that also can continue when not having sunlight, improve the utilization rate of boiler.
Accompanying drawing explanation
Fig. 1. for generation of the energy storage type solar steam copper of the employing Molten Salt Heat Transfer heat accumulation of the present utility model of steam;
Wherein 1-heat transfer medium conveyance conduit, 2-heating plant, 3-high temperature melting salt cellar, 4-1 steam generator, 4-2 preheater, 5-low-temperature molten salt tank, 6-circulating pump, 7-1 valve 1,7-2 valve 2,7-3 valve 3,8-oxygen-eliminating device, 9-cold heat transfer media conveyance conduit.
Detailed description of the invention
As shown in Figure 1, a kind of energy storage type solar steam boiler adopting Molten Salt Heat Transfer heat accumulation that the utility model provides, is characterized in that:
Comprise heat transfer medium feed track 1, heating plant 2, high temperature melting salt cellar 3, output device and low-temperature molten salt tank 5; Described heat transfer medium conveyance conduit 1 is return capable of circulation, and successively with heating plant 2, high temperature melting salt cellar 3, output device are interchangeable thermally to connect, and is communicated with described low-temperature molten salt tank 5 inside;
Heat transfer medium in described heat transfer medium conveyance conduit 1 and the heat-storage medium in high temperature melting salt cellar 3 are composite fused salt;
Described heating plant 2 is for collecting solar energy to heat the heat transfer medium in described heat transfer medium conveyance conduit 1;
Described heat transfer medium conveyance conduit 1 is provided with circulating pump 6, and described circulating pump 6 is for providing power for described heat transfer medium circulates in described heat transfer medium conveyance conduit 1;
Heat transfer medium in described heat transfer medium conveyance conduit 1 absorbs heat successively from heating plant 2, then to high temperature melting salt cellar 3, output device heat release, a part of heat is stored in high temperature melting salt cellar 3, the water flowed through in part heat heating output device, the heat transfer medium after release heat energy flows in described low-temperature molten salt tank 5; Heat transfer medium in low-temperature molten salt tank 5 flow back in described heating plant and starts next recuperated cycle under the power of circulating pump;
Described output device comprises the steam generator 4-1 and 4-2 preheater that are connected successively by described heat transfer medium conveyance conduit; Under using state, heat transfer medium enters described preheater after steam generator flows out, and finally gets back in heating plant or heat transfer medium buffer container; Described steam generator is for becoming water vapour by the hot water heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described preheater is used for providing hot water to described steam generator; The heat of described preheater preheats hot water partly or entirely derives from the waste heat in the heat transfer medium flowed through.
In steam boiler in the utility model, heating plant is for assembling solar energy as thermal source, energy-conserving and environment-protective.The solar energy that heat transfer unit (HTU) absorbs according to different environmental requirements, can select different mode of heatings.In boiler, a high temperature melting salt cellar is provided with in the downstream of heating plant, the heat energy that the illumination good period is collected can partly be stored in high temperature melting salt cellar, preheating water in part circulating-heating output device is to export steam, heat transfer heat-storage medium after heat release is got back in low-temperature molten salt tank, the period that illumination is good, the heat transfer heat-storage medium reclaimed in low-temperature molten salt tank is pumped to heating plant position and described heating plant carries out heat exchange heat absorption.The period that illumination is bad, under the power of circulating pump, utilize the high-temperature molten salt stored in high temperature melting salt cellar, heat is sent to output device.In the utility model, heat transfer heat-storage medium is fused salt, has thermal conductivity factor good, the focus that storage density is large, both be applicable to heat transfer and be also applicable to heat accumulation, serviceability temperature is high, and efficiency is high, the output steam that also can continue when not having sunlight can be ensured, good in economic efficiency, environmental protection and energy saving.
Described heating plant 2 is selected from slot type, tower, linear Fresnel formula employing solar light-heat power-generation gathering solar device.
Heat transfer medium conveyance conduit 1 between described heating plant 2 to described high temperature melting salt cellar 3 is provided with valve 17-1; Nearly heating plant 2 one end of heat transfer medium conveyance conduit 1 between described low-temperature molten salt tank 5 and described heating plant 2 is provided with valve 27-2.The closed circuit that valve is formed for closing/opening heat transfer medium conveyance conduit.
Further, also be provided with one section and can avoid valve 27-2, described heat transfer medium is also delivered directly to cold heat transfer media conveyance conduit 9 with described high-temperature molten salt tank connected heat transfer medium conveyance conduit 1 from described low-temperature molten salt tank by heating plant 2 and valve 17-1, and described cold heat transfer media conveyance conduit 9 is provided with valve 37-3.This pipeline arranges valve 3 so that open and close.Valve-off 3 when illumination is good, illumination difference or night Open valve 3 to utilize the heat of the storage in high-temperature molten salt tank.
Described heat transfer/heat-storage medium is quartz sand composite fused salt.In the utility model, preferred quartz sand composite fused salt, is shown in number of patent application 201310732738.2,201310040070.5, quartz sand composite fused salt described in 201310040909.5.There is the advantage reducing fused salt use cost.Those skilled in the art also can adopt the fused salt with approximate characteristic having and report in prior art as heat transfer heat-storage medium.
In above-mentioned arbitrary boiler, described preheater is also connected with oxygen-eliminating device 8.For except oxygen contained in anhydrating, ensure feed water quality, make the pipeline of boiler flow passage component and heat-exchange system and equipment from corrosion, increase the service life.
To sum up, the utility model has the advantage of following several respects:
1. the utility model adopts the heat that provides of solar energy assembled as thermal source, energy-conserving and environment-protective.Three kinds of modes can be adopted to provide thermal source: slot type, Jing Chang that is tower, linear Fresnel formula solar light-heat power-generation mode assemble solar energy.According to different environmental requirements, different mode of heatings can be selected.
2. the utility model utilizes Molten Salt Heat Transfer heat accumulation, and fused salt serviceability temperature is high, and efficiency is high, good in economic efficiency, environmental protection and energy saving.The composite fused salt that heat accumulating preferably utilizes our company to invent, thermal conductivity factor is good, and storage density is large.
3. the utility model utilizes two tank to carry out heat accumulation, ensureing the confession steam that also can continue when not having sunlight, improve the utilization rate of boiler.