A kind of energy storage type solar superheated steam boiler adopting heat-conducting oil
Technical field
The utility model relates to solar utilization technique, particularly a kind of energy storage type solar superheated steam boiler adopting heat-conducting oil.
Background technology
Superheated steam life and industrial production in purposes widely.Current superheated steam boiler generally adopts natural gas, fuel oil, and electrical heating provides heat, but fuel cost is too high, and produces environmental pollution.Solar boiler becomes first-selection prepared by industrial steam.Such as, but there are some defects to be solved in current solar boiler, can only work by day, and makes utilization rate of equipment and installations reduce.For addressing this problem, some solar boiler combines at night and adopts electrically heated mode to improve boiler operating efficiency; On the other hand, current boiler generally adopts fused salt as heat transfer medium, but fused salt due to freezing point higher, if the lower or piping loop insufficient pressure by the water initial temperature that heats, fused salt easily solidifies or causes circulating line to block in heating surface crystallization etc. in heat circulating system with after water heat exchange; The third aspect, current solar boiler product is higher for environmental requirement, and the low operating cost that causes of efficiency is high under some conditions.Although but there is these problems, due to its inexhaustible feature, how Efficient Development utilizes solar energy, is still worth people to go to explore.
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, can ensure in different environments to continue to provide superheated steam, and operating cost is low, be not easy to cause line clogging, concrete scheme is as follows:
Adopt an energy storage type solar superheated steam boiler for heat-conducting oil, it is characterized in that:
Comprise and connect following a few part in closed circuit successively by heat transfer medium conveyance conduit: heating plant, heat transfer medium buffer container, heat-storing device and output device;
Described heating plant is for collecting solar energy and heating heat transfer medium;
Described heat transfer medium conveyance conduit is used for the heat transfer medium carrying heat energy to heat-storing device and output device conveying;
Described heat-storing device is used for splendid attire heat-storage medium;
Described heat transfer medium buffer container is used for heat transfer medium in closed circuit described in splendid attire;
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 conveyance conduit;
Described heat transfer medium conveyance conduit is used for heat transfer medium to be delivered to described heat-storing device and described output device from described heating plant, described heat-storage medium is heated, and make described output device export hot water or steam or superheated steam, finally the heat transfer medium conveying after release heat energy is got back in heating plant or described output device;
Described heat transfer medium is conduction oil;
Described output device comprises the superheated steam generator, steam generator and the preheater that are connected successively by described heat transfer medium conveyance conduit; Under using state, heat transfer medium enters steam generator after superheated steam generator flows out, and then enters described preheater, finally gets back in heating plant or heat transfer medium buffer container; Described superheated steam generator is for becoming superheated steam by the Steam Heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described steam generator is for becoming steam by the hot water heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described preheating device is used for the hot water providing preheating 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 boiler of the present utility model, be provided with heat transfer medium buffer container, for buffer system pressure oscillation, play the effect of voltage stabilizing off-load, when in system, heat conduction oil pressure slightly changes, the pressure stability of system can be ensured, pump can not be opened frequently because of the change of pressure, improve the security of system and the service life of equipment.Heat transfer medium adopts conduction oil, is also provided with heat-storing device, for splendid attire heat-storage medium.Can be that there is the fused salt of heat storage function, conduction oil or other phase-change material for heat-storage medium of the present utility model.Conduction oil flow in closed circuit and successively with heating plant, heat-storing device, output device generation heat exchange; Time sunny, after conduction oil obtains heat energy from heating plant, flow through heat-storing device and make heat-storage medium wherein obtain heat energy storing, flow through and take hot output device and make water wherein be heated into hot water, water vapour, superheated steam; Conduction oil freezing point is low, is not easy frozen plug.Night or sunlight weak time, the heat that in heat-storing device, heat-storage medium stores can reasonable time section in provide heat to conduction oil thus ensure that conduction oil to continue in closed circuit flowing and heat hot water, water vapour, superheated steam.The circulating pump of quantity abundance pipeline in closed circuit is also equipped with, for conduction oil provides circulation power.
The utility model utilizes fused salt store heat, ensures the confession superheated steam that also can continue when not having sunlight, good in economic efficiency, environmental protection and energy saving.Fused salt is in the price of heat transfer medium and have absolute advantage in service life; Fused salt specific heat is large, and storage density is large, and early stage, equipment investment cost was low; Low to the requirement of heat accumulation equipment.Adopt conduction oil to conduct heat simultaneously, produce very little pressure while very high operating temperature can be obtained, namely greatly can reduce operating pressure and the safety requirements of high-temperature heating system, improve the reliability of system and equipment; The process requirements of different temperatures heating, cooling can be met in wider temperature range, or realize high-temperature heating and subcooled technological requirement with same conduction oil simultaneously in same system.Namely the complexity of system and operation can be reduced; Eliminate water treatment system and equipment, improve system thermal efficiency, decrease the maintenance workload of equipment and pipeline.Namely initial cost and the operating cost of heating system can be reduced; In brief, under low pressure can conduct heat, improve the security of system.
In boiler of the present utility model, in described output device, comprise superheated steam generator, steam generator and preheater, the heat of steam generator and preheater can be originated and the heat transfer medium in the closed circuit of this boiler fully, also can partly originate and the preheating of the heat transfer medium in this steam-generating circuit, or a set of steam-generating circuit system similar with the utility model in addition that be equipped with is used for providing steam or hot water simultaneously, this is a heat exchanger for generation of the output device in the steam generator system of preheating water in addition simply, for providing preheating water to steam generator.
Preferred described heating plant is selected from slot type, tower, linear Fresnel formula solar light-heat power-generation gathering solar device.Different heating plants can be selected under various circumstances, make boiler of the present utility model not by the restriction of environment for use.
Heat transfer medium conveyance conduit between preferred described heating plant to described heat transfer medium buffer container is provided with valve 1; The nearly heating plant one end of heat transfer medium conveyance conduit between described output device and described heating plant is provided with valve 2.Valve 1 or valve 2 are for regulating flow path or the flow velocity of conduction oil in closed circuit.
Preferably being also provided with one section can avoid valve 2, heating plant and valve 1, and by the heat transfer medium conveyance conduit that output device is directly communicated with described heat transfer medium buffer container, this section of heat transfer medium conveyance conduit is provided with valve 3.This pipeline, in conjunction with valve 1 and 2 use, night or sunlight too weak time, valve-off 1 and 2, Open valve 3, makes conduction oil not flow through heating plant, reduce heat loss, directly between all the other devices, form closed circuit, utilize the heat energy storage of heat-storing device to prepare steam.
Preferred described 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.
Preferred described heat exchanger 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.
In sum, the solar energy superheated steam boiler that the utility model provides, adopt the mode heat supply of solar light-heat power-generation focused solar energy, the collecting efficiency of system is high, can improve the utilization rate of the energy.Energy-storage system is set, guarantee system can 24 hours sustaining temperature superheated steam is provided; Utilize the quartz sand composite fused salt energy storage of single tank and our unit's research and development, from equipment and material, all reduce early investment cost, and single tank makes the control of system more simple.Put double loop heating system, be reduced in thermal losses when utilizing the energy heat supply stored night, also can reduce the power consumption of Heat-transfer Oil Pump.Have the loop can closing output device when solar energy by day, the system of guarantee can preheating fast.
Beneficial effect
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 fused salt store heat, and what ensure also to continue when not having sunlight provides superheated steam, good in economic efficiency, environmental protection and energy saving.Adopt conduction oil to conduct heat, be not easy to cause line clogging, boiler attendance cost is low.
3. the utility model utilizes single tank to carry out static heat accumulation, and heat accumulating can utilize the quartz sand composite fused salt of our company's utility model, reduces the cost of investment at initial stage.
Accompanying drawing explanation
The energy storage type solar superheated steam boiler schematic diagram of Fig. 1 employing heat-conducting oil of the present utility model;
1-heat transfer medium conveyance conduit, 2-heating plant (heat collector), 3-heat transfer medium buffer container (conduction oil surge tank), 4-heat-storing device (fused salt holding vessel) and 5-1 superheated steam generator, 5-2 steam generator, 5-3-preheater, 6-circulating pump, 7-1 valve 1,7-2 valve 2,7-3 valve 3,8-oxygen-eliminating device
Detailed description of the invention
As shown in Figure 1, the energy storage type solar steam boiler of the employing heat-conducting oil that the utility model provides, comprise and connect following a few part in closed circuit successively by heat transfer medium conveyance conduit 1: heating plant 2, heat transfer medium buffer container 3, heat-storing device 4 and output device; Described heating plant 2 is for collecting solar energy and heating heat transfer medium; Described heat transfer medium conveyance conduit 1 is for carrying the heat transfer medium of heat energy to heat-storing device 4 and output device 5 conveying; Described heat-storing device 4 is for splendid attire heat-storage medium; Described heat transfer medium buffer container 3 is for heat transfer medium in closed circuit described in splendid attire; Described heat transfer medium conveyance conduit is provided with circulating pump 6, and described circulating pump is used for providing power for described heat transfer medium circulates in described heat transfer medium conveyance conduit 1; Described heat transfer medium conveyance conduit 1 is for being delivered to described heat-storing device 4 and described output device by heat transfer medium from described heating plant, described heat-storage medium is heated, and make output device export steam, finally heating plant 2 or described heat transfer medium buffer container 3 are got back in the heat transfer medium conveying after release heat energy; Described heat transfer medium is conduction oil; Described output device comprises the superheated steam generator 5-1, steam generator 5-2 and the preheater 5-3 that are connected successively by described heat transfer medium conveyance conduit; Under using state, heat transfer medium enters steam generator 5-2 after superheated steam generator 5-1 flows out, and then through described preheater 5-3, finally gets back in heating plant 2 or heat transfer medium buffer container 3; Described superheated steam generator 5-1 is for becoming superheated steam by the Steam Heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described steam generator 5-2 is for becoming steam by the hot water heating be provided after the heat that absorbs described heat transfer medium and carry and exporting; Described preheater 5-3 is used for the hot water providing preheating to described steam generator 5-2; The heat of described preheater 5-3 preheating hot water partly or entirely derives from the waste heat in the heat transfer medium flowed through.
The heat transfer medium buffer container arranged in steam generator system of the present utility model is for buffer system pressure oscillation, play the effect of voltage stabilizing off-load, when in system, heat conduction oil pressure slightly changes, the pressure stability of system can be ensured, pump can not be opened frequently because of the change of pressure, improves the security of system and the service life of equipment.Heat transfer medium adopts conduction oil, is also provided with heat-storing device, for splendid attire heat-storage medium.Can be that there is the fused salt of heat storage function, conduction oil or other phase-change material for heat-storage medium of the present utility model.Conduction oil flow in closed circuit and successively with heating plant, heat-storing device, output device generation heat exchange; Time sunny, after conduction oil obtains heat energy from heating plant, flow through heat-storing device and make heat-storage medium wherein obtain heat energy and store, flow through and take hot output device acquisition superheated steam; Conduction oil freezing point is low, is not easy frozen plug.Night or sunlight inadequate time, the heat that in heat-storing device, heat-storage medium stores can reasonable time section in provide heat to conduction oil thus ensure that conduction oil to continue in closed circuit flowing and produces superheated steam.The circulating pump of quantity abundance pipeline in closed circuit is also equipped with, for conduction oil provides circulation power.
The utility model utilizes fused salt store heat, and what ensure also to continue when not having sunlight provides superheated steam, good in economic efficiency, environmental protection and energy saving.Fused salt specific heat is large, and storage density is large, and early stage, equipment investment cost was low; Low to the requirement of heat accumulation equipment.Adopt conduction oil to conduct heat simultaneously, under the condition of almost normal pressure, can obtain very high operating temperature; The process requirements of different temperatures heating, cooling can be met in wider temperature range, or realize high-temperature heating and subcooled technological requirement with same conduction oil simultaneously in same system, namely can reduce the complexity of system and operation; Eliminate water treatment system and equipment, improve system thermal efficiency, decrease the maintenance workload of equipment and pipeline.
In boiler of the present utility model, described output device comprises the superheated steam generator, steam generator and the preheater that are connected successively; Under using state, heat transfer medium enters steam generator after superheated steam generator flows out, and then enters described preheater, finally gets back in heating plant or heat transfer medium buffer container; The origin of heat of the steam that described steam generator produces partly can derive from the preheating of the heat transfer medium in this steam-generating circuit, or be equipped with a set of steam-generating circuit system similar with the utility model in addition simultaneously, output device in this other set of system comprises steam generator and preheater, and the superheated steam generation generator 5-1 be specifically designed to superheated steam boiler of the present utility model provides steam.
Heat transfer medium in the origin of heat of the preheating of preheater 5-3 described in boiler of the present utility model hot water and the closed circuit of this boiler, also can partly originate and the preheating of the heat transfer medium in this steam-generating circuit, or be equipped with a set of hot-water boiler closed circuit system similar with the utility model in addition simultaneously, output device in this other set of system is a heat exchanger simply, be specifically designed to the preheater in the superheated steam boiler shown in the utility model Fig. 1, and provide hot water to steam generator.
In some embodiments, preferred described heating plant 2 is selected from slot type, tower, linear Fresnel formula employing solar light-heat power-generation gathering solar device.Different heating plants can be selected under various circumstances, make boiler of the present utility model not by the restriction of environment for use.Tower relatively more applicable vacant lot area is comparatively large, and solar energy resources is better, and the place that hot water demand is larger; It is not fine that slot type is relatively applicable to sunlight resource, and vacant lot area is less, the area that soil is comparatively smooth, and linear Fresnel formula does distributed urbanite water consumption being applicable to, the area that up-front investment cost budgeting is less.
In some embodiments, the heat transfer medium conveyance conduit between preferred described heating plant 2 to described heat transfer medium buffer container is provided with 7-1 valve 1; The nearly heating plant one end of heat transfer medium conveyance conduit between described output device and described heating plant 1 is provided with 7-2 valve 2.Valve 1 or valve 2 are for regulating flow path or the flow velocity of conduction oil in closed circuit.
In some embodiments, preferably being also provided with one section can avoid valve 2, heating plant 2 and valve 1, and by the heat transfer medium conveyance conduit 1 that output device 5 is directly communicated with described heat transfer medium buffer container 3, this section of heat transfer medium conveyance conduit 1 is provided with 7-3 valve 3.This pipeline, in conjunction with valve 1 and 2 use, night or sunlight too weak time, valve-off 1 and 2, Open valve 3, makes conduction oil not flow through heating plant, reduce heat loss, directly between all the other devices, form closed circuit, utilize the heat energy storage of heat-storing device to prepare hot water.
In some embodiments, preferred described 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.
In most of embodiment, described heat exchanger 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.
In sum, the solar heat homogeneous solution-type reactor that the utility model provides, adopt the mode heat supply of solar light-heat power-generation focused solar energy, the collecting efficiency of system is high, can improve the utilization rate of the energy.Energy-storage system is set, guarantee system can 24 hours sustaining temperature superheated steam is provided; Utilize the quartz sand composite fused salt energy storage of single tank and our unit's research and development, from equipment and material, all reduce early investment cost, and single tank makes the control of system more simple.Put double loop heating system, be reduced in thermal losses when utilizing the energy heat supply stored night, also can reduce the power consumption of Heat-transfer Oil Pump.Have the loop can closing output device when solar energy by day, the system of guarantee can preheating fast.