CN114659399B - thermal shock resistance solid heat storage device - Google Patents
thermal shock resistance solid heat storage device Download PDFInfo
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- CN114659399B CN114659399B CN202210384840.7A CN202210384840A CN114659399B CN 114659399 B CN114659399 B CN 114659399B CN 202210384840 A CN202210384840 A CN 202210384840A CN 114659399 B CN114659399 B CN 114659399B
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- heat storage
- spherical
- heat accumulator
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- 238000005338 heat storage Methods 0.000 title claims abstract description 123
- 239000007787 solid Substances 0.000 title claims abstract description 39
- 230000035939 shock Effects 0.000 title claims abstract description 31
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 93
- 239000000395 magnesium oxide Substances 0.000 claims description 53
- 239000000843 powder Substances 0.000 claims description 51
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 46
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 24
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000007767 bonding agent Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 229920005610 lignin Polymers 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910000856 hastalloy Inorganic materials 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 10
- 238000005485 electric heating Methods 0.000 abstract description 9
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 13
- 238000005245 sintering Methods 0.000 description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 230000008646 thermal stress Effects 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052596 spinel Inorganic materials 0.000 description 4
- 239000011029 spinel Substances 0.000 description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a thermal shock resistant solid heat storage device, and relates to a thermal shock resistant solid heat storage device. The invention aims to solve the problem of low service life of the existing solid heat accumulating electric heating device. The process is as follows: the thermal shock resistant solid heat storage device sequentially comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom; the upper end heat storage element sequentially comprises an upper positioning base, a spherical heat storage body and an upper fixing clamp cover from top to bottom; the lower end heat storage element sequentially comprises a lower fixing clamp cover, a spherical heat accumulator and a lower positioning base from top to bottom; the middle heat storage element comprises an upper fixing clamp cover, a spherical heat storage body and a lower fixing clamp cover from top to bottom in sequence; the upper positioning base is fixedly connected with the upper fixing clamp cover; the lower positioning base is fixedly connected with the lower fixing clamp cover; the upper fixing clamp cover is fixedly connected with the lower fixing clamp cover. The invention is used in the field of thermal shock resistance solid heat storage.
Description
Technical Field
the invention relates to a thermal shock resistant solid heat storage device.
Background
The solid energy storage technology is adopted to carry out electric heat accumulation in the valley electricity time, and the electric heat accumulation is applied to building heating, so that the electric power peak shaving of the power grid and the reduction of the user heating operation cost are both of great value.
The solid heat storage components adopted by the solid heat storage electric heating devices in the market at present all take magnesium oxide as a main material, and fully utilize the characteristics of high temperature resistance, large specific heat capacity and excellent heat conduction performance of the magnesium oxide. However, magnesium oxide also has the problems of larger thermal expansion coefficient and poor thermal shock resistance, so that excessive thermal stress is easily generated in the heat storage material in the high-low temperature circulation process, when the local thermal stress is larger than the local material strength limit, the microstructure in the material is torn, after multiple high-low temperature circulation, excessive microcracks accumulated in the material can cause obvious attenuation of heat storage and release performance, and the whole solid heat storage electric heating device cannot be normally used, so that the service life of the solid heat storage electric heating device is seriously influenced.
Disclosure of Invention
The invention aims to solve the problems that the solid heat storage components adopted by the existing solid heat storage electric heating device all use magnesium oxide as a main material, have larger thermal expansion coefficient and poor thermal shock resistance, and the service life of the solid heat storage electric heating device is low, and provides the thermal shock resistance solid heat storage device.
the thermal shock resistant solid heat storage device sequentially comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom; n is a positive integer;
The upper end heat storage element sequentially comprises an upper positioning base, a spherical heat storage body and an upper fixing clamp cover from top to bottom;
The lower end heat storage element sequentially comprises a lower fixing clamp cover, a spherical heat accumulator and a lower positioning base from top to bottom;
the middle heat storage element comprises an upper fixing clamp cover, a spherical heat storage body and a lower fixing clamp cover from top to bottom in sequence;
The upper positioning base is fixedly connected with the upper fixing clamp cover and used for fixing the spherical heat accumulator;
The lower positioning base is fixedly connected with the lower fixing clamp cover and used for fixing the spherical heat accumulator;
the upper fixing clamp cover and the lower fixing clamp cover are fixedly connected and used for fixing the spherical heat accumulator;
the spherical heat accumulator is tangent to the upper positioning base, and is intersected with the upper fixing clamp cover;
The spherical heat accumulator is tangent to the lower positioning base, and is intersected with the lower fixing clamp cover;
the spherical heat accumulator is intersected with the upper fixing clamp cover, and the spherical heat accumulator is intersected with the lower fixing clamp cover.
The beneficial effects of the invention are as follows:
The invention provides a solid heat storage component with excellent thermal shock resistance, which selects a spherical heat storage body, improves the thermal shock resistance of the heat storage body by utilizing the characteristic of optimal thermal shock resistance of the spherical shape, and improves the thermal shock resistance of the heat storage body by adding proper amount of ferric oxide fine powder and nanometer monoclinic zirconia respectively from the aspects of improving the bonding strength of a magnesium oxide grain boundary and forming proper amount of microcracks, thereby solving the problem of obvious attenuation of long-term service performance of a household solid heat storage electric heating device and greatly prolonging the service life of the household solid heat storage electric heating device.
The principle of the heat accumulator raw material selection and firing process is as follows: the method is characterized in that sintered magnesia particles, sintered magnesia fine powder, zirconia fine powder and ferric oxide fine powder are used as main raw materials for manufacturing the heat accumulator, wherein the sintered magnesia particles are used as aggregate, and the characteristics of high temperature resistance, large specific heat capacity and large heat conductivity of the magnesia are fully utilized to ensure the heat accumulation and release performance of the solid heat accumulator; the main function of the sintered magnesia fine powder is to fully mix with zirconia fine powder and ferric oxide fine powder, so that each additive material is uniformly distributed in the product and fully plays a role; the zirconia micropowder is fully mixed and then uniformly distributed at the grain boundary of the magnesia crystal grain to form a solid solution with magnesia, so that the magnesia crystal lattice is activated, the sintering of the magnesium heat storage part is promoted, meanwhile, in the high-temperature sintering process, the zirconia undergoes volume change due to the crystal form transformation, so that microcracks are generated in the material, and the microcracks can absorb thermal stress in the thermal shock process, so that the thermal shock resistance of the solid heat storage part is improved; wherein, the magnesium spinel is formed with the surrounding magnesium oxide in the sintering process of the fine iron oxide powder, and the magnesium spinel is distributed around the magnesium oxide grain boundary, so that the bonding strength of the grain boundary can be improved, the thermal stress resistance of the solid heat storage part is enhanced, and the thermal shock resistance of the solid heat storage part is improved.
The structural design principle of the solid heat storage component is as follows: according to the invention, the spherical heat accumulator is selected, the characteristic that the spherical shape is the optimal shape of the thermal shock resistance is fully utilized, the thermal shock resistance of the heat accumulator is effectively improved, the spherical heat accumulator is positioned and fixed by utilizing the positioning base and the fixing clamp cover, the positioning base is a metal base and a heat-preserving base with lower heat conductivity, the heat of the heat accumulator is saved, the fixing clamp cover is made of a high heat-conducting metal material, and the heat exchange of a convection heat exchange surface is facilitated; meanwhile, the solid heat storage component utilizes the characteristic of a spherical shape, the heat exchange area of a heat convection surface is larger, the spherical protrusions can effectively disturb air flow, heat convection is enhanced, heat convection efficiency is greatly improved, and the heat conduction and heat transfer area of the heat conduction and heat transfer part is smaller because the spherical shape is the shape with the smallest specific surface area, so that the heat conduction and heat transfer efficiency of the heat storage body is reduced, and the external surface temperature of the device is reduced.
Drawings
FIG. 1 is a plan view of a thermal storage element;
FIG. 2 is a side sectional view of a solid heat storage member;
FIG. 3 is a side cross-sectional view of an end heat storage element;
FIG. 4 is a partial side cross-sectional view of an end heat storage element;
FIG. 5 is a side cross-sectional view of an intermediate portion thermal storage element;
FIG. 6 is a partial side cross-sectional view of a middle portion thermal storage element;
FIG. 7 is a schematic view of an end heat storage element
FIG. 8 is a schematic view of an intermediate portion heat storage element
Fig. 9 is an application diagram of a heat storage water heating device, 7 is a heat insulation layer, 8 is a heat storage rotor, 9 is an electric heating wire, 10 is a rack, 11 is a water outlet pipe, 12 is a water inlet pipe, 13 is a heat exchanger, 14 is an air duct, and 15 is a high-temperature centrifugal fan;
fig. 10 is a view showing the application of the heat storage hot air apparatus.
Detailed Description
The first embodiment is as follows: the thermal shock resistant solid heat storage device comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom in sequence; n is a positive integer;
The upper end heat storage element comprises an upper positioning base 1, a spherical heat accumulator 5 and an upper fixing clamp cover 2 from top to bottom in sequence;
The lower end heat storage element comprises a lower fixing clamp cover 4, a spherical heat accumulator 5 and a lower positioning base 3 from top to bottom in sequence;
The middle heat storage element comprises an upper fixed clamping cover 2, a spherical heat accumulator 5 and a lower fixed clamping cover 4 from top to bottom in sequence;
the upper positioning base 1 is fixedly connected with the upper fixing clamp cover 2 and is used for fixing the spherical heat accumulator 5;
The lower positioning base 3 is fixedly connected with the lower fixing clamp cover 4 and is used for fixing the spherical heat accumulator 5;
The upper fixing clamp cover 2 and the lower fixing clamp cover 4 are fixedly connected and used for fixing the spherical heat accumulator 5;
The spherical heat accumulator 5 is tangent to the upper positioning base 1, and the spherical heat accumulator 5 is intersected with the upper fixing clamp cover 2;
the spherical heat accumulator 5 is tangent to the lower positioning base 3, and the spherical heat accumulator 5 is intersected with the lower fixing clamp cover 4;
the spherical heat accumulator 5 is intersected with the upper fixing clamp cover 2, and the spherical heat accumulator 5 is intersected with the lower fixing clamp cover 4.
The structural design principle of the solid heat storage component is as follows: according to the invention, the spherical heat accumulator is selected, the characteristic that the spherical shape is the optimal shape of the thermal shock resistance is fully utilized, the thermal shock resistance of the heat accumulator is effectively improved, the spherical heat accumulator is positioned and fixed by utilizing the positioning base and the fixing clamp cover, the positioning base is a metal base and a heat-preserving base with lower heat conductivity, the heat of the heat accumulator is saved, the fixing clamp cover is made of a high heat-conducting metal material, and the heat exchange of a convection heat exchange surface is facilitated; meanwhile, the solid heat storage component utilizes the characteristic of a spherical shape, the heat exchange area of a heat convection surface is larger, the spherical protrusions can effectively disturb air flow, heat convection is enhanced, heat convection efficiency is greatly improved, and the heat conduction and heat transfer area of the heat conduction and heat transfer part is smaller because the spherical shape is the shape with the smallest specific surface area, so that the heat conduction and heat transfer efficiency of the heat storage body is reduced, and the external surface temperature of the device is reduced.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that the upper positioning base 1 and the lower positioning base 3 are heat-insulating fixed bases placed in a high-temperature-resistant metal base.
Other steps and parameters are the same as in the first embodiment.
and a third specific embodiment: the difference between this embodiment and the first or second embodiment is that the upper fixing clip cover 2 and the lower fixing clip cover 4 are high temperature resistant and high thermal conductivity metal cover shells with circular holes according to the size requirement of the spherical heat accumulator 5.
Other steps and parameters are the same as in the first or second embodiment.
the specific embodiment IV is as follows: the difference between the embodiment and one to three embodiments is that the two ends of the upper positioning base 1, the upper fixing clamp cover 2, the lower positioning base 3 and the lower fixing clamp cover 4 are provided with rolled 90-degree edges;
the upper positioning base 1 is fixedly connected with the 90-degree edges rolled out at the two ends of the upper fixing clamp cover 2 through screws 6, and is used for fixing the spherical heat accumulator 5;
The lower positioning base 3 is fixedly connected with the 90-degree edges rolled out at the two ends of the lower fixing clamp cover 4 through screws 6, and is used for fixing the spherical heat accumulator 5;
The upper fixing clamp cover 2 and the lower fixing clamp cover 4 are fixedly connected through screws 6, and the edges of 90 degrees rolled out from the two ends of the upper fixing clamp cover and the lower fixing clamp cover are used for fixing the spherical heat accumulator 5.
Other steps and parameters are the same as in one to three embodiments.
fifth embodiment: the first to fourth embodiments are different from the first to fourth embodiments in that the high-temperature-resistant metal base is made of hastelloy (or cast steel);
The heat-insulating fixed base is made of composite silicate heat-insulating materials.
Other steps and parameters are the same as in one to four embodiments.
specific embodiment six: this embodiment differs from one to five of the embodiments in that the high thermal conductivity metal cap shell is made of cast steel.
Other steps and parameters are the same as in one of the first to fifth embodiments.
Seventh embodiment: the first difference between this embodiment and the specific embodiment is that the spherical heat storage body 5 is prepared by the following steps:
Weighing 60 parts of sintered magnesia granular aggregate, 22-34 parts of sintered magnesia fine powder, 0-6 parts of zirconia fine powder, 6-12 parts of ferric oxide fine powder and 4 parts of bonding agent according to parts by weight;
The spherical heat accumulator is formed by taking magnesium oxide as a main material, adding zirconium oxide and ferric oxide as auxiliary materials and sintering at high temperature;
step two, pre-stirring the sintered magnesia particle aggregate and a bonding agent (lignin liquid);
step three, mixing and stirring the sintered magnesia fine powder, the zirconia fine powder and the ferric oxide fine powder, pouring the mixture into the aggregate stirred in the step two, and stirring and mixing the mixture;
Pouring the materials mixed in the step three into a spherical mold (the radius of the spherical mold is 10-100 mm, a spherical heat accumulator is manufactured every 10mm different in radius, and 10 spherical heat accumulators with different radii are all manufactured), and pressing and forming under a four-column oil press;
Step five, placing the pressed sample in a constant temperature drying oven for drying and taking out;
and step six, preserving the heat of the dried sample in a high-temperature muffle furnace to obtain the spherical heat accumulator 5.
the principle of the heat accumulator raw material selection and firing process is as follows:
The method is characterized in that sintered magnesia particles, sintered magnesia fine powder, zirconia fine powder and ferric oxide fine powder are used as main raw materials for manufacturing the heat accumulator, wherein the sintered magnesia particles are used as aggregate, and the characteristics of high temperature resistance, large specific heat capacity and large heat conductivity of the magnesia are fully utilized to ensure the heat accumulation and release performance of the solid heat accumulator; the main function of the sintered magnesia fine powder is to fully mix with zirconia fine powder and ferric oxide fine powder, so that each additive material is uniformly distributed in the product and fully plays a role; the zirconia micropowder is fully mixed and then uniformly distributed at the grain boundary of the magnesia crystal grain to form a solid solution with magnesia, so that the magnesia crystal lattice is activated, the sintering of the magnesium heat storage part is promoted, meanwhile, in the high-temperature sintering process, the zirconia undergoes volume change due to the crystal form transformation, so that microcracks are generated in the material, and the microcracks can absorb thermal stress in the thermal shock process, so that the thermal shock resistance of the solid heat storage part is improved; wherein, the magnesium spinel is formed with the surrounding magnesium oxide in the sintering process of the fine iron oxide powder, and the magnesium spinel is distributed around the magnesium oxide grain boundary, so that the bonding strength of the grain boundary can be improved, the thermal stress resistance of the solid heat storage part is enhanced, and the thermal shock resistance of the solid heat storage part is improved.
Other steps and parameters are the same as in the first embodiment.
Eighth embodiment: the difference between the embodiment and one to seven of the embodiments is that the particle size of the 0.088mm < sintered magnesia particle aggregate is less than 1mm, the particle size of the sintered magnesia fine powder is less than or equal to 0.088mm, the zirconia fine powder is nano monoclinic zirconia, the particle size of the ferric oxide fine powder is less than or equal to 0.076mm, and the aggregate with smaller particle size and the fine powder are favorable for uniform material distribution after mixing, so that the thermal shock resistance of the product can be effectively improved.
other steps and parameters are the same as those of one of the first to seventh embodiments.
Detailed description nine: this embodiment differs from one to eight embodiments in that the binding agent is a lignin solution having a mass fraction of 3%.
other steps and parameters are the same as in one to eight of the embodiments.
Detailed description ten: this embodiment differs from one of the first to ninth embodiments in that the spherical mold in the fourth step is one or more spherical molds having a radius of 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100 mm.
other steps and parameters are the same as in one of the first to ninth embodiments.
The following examples are used to verify the benefits of the present invention:
Embodiment one:
The thermal shock resistant solid heat storage device sequentially comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom;
The upper end heat storage element comprises an upper positioning base (1), a spherical heat storage body (5) and an upper fixing clamp cover (2) from top to bottom in sequence;
The lower end heat storage element comprises a lower fixing clamp cover (4), a spherical heat accumulator (5) and a lower positioning base (3) from top to bottom in sequence;
the middle heat storage element comprises an upper fixing clamp cover (2), a spherical heat storage body (5) and a lower fixing clamp cover (4) from top to bottom in sequence;
An upper fixing clamp cover (2) in the upper end heat storage element is used as an upper fixing clamp cover (2) of an intermediate heat storage element adjacent to the upper end heat storage element;
a lower fixing clamp cover (4) in the lower end heat storage element is used as a lower fixing clamp cover (4) of an intermediate heat storage element adjacent to the lower end heat storage element;
the upper positioning base (1) is fixedly connected with the upper fixing clamp cover (2) and is used for fixing the spherical heat accumulator (5);
The lower positioning base (3) is fixedly connected with the lower fixing clamp cover (4) and is used for fixing the spherical heat accumulator (5);
the upper fixing clamp cover (2) and the lower fixing clamp cover (4) are fixedly connected and used for fixing the spherical heat accumulator (5);
The spherical heat accumulator (5) is tangential to the upper positioning base (1), and the spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2);
The spherical heat accumulator (5) is tangential to the lower positioning base (3), and the spherical heat accumulator (5) is intersected with the lower fixed clamping cover (4);
The spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2), and the spherical heat accumulator (5) is intersected with the lower fixing clamp cover (4);
the spherical heat accumulator (5) is prepared according to the following steps:
Weighing 60 parts of sintered magnesia granular aggregate, 22-34 parts of sintered magnesia fine powder, 0-6 parts of zirconia fine powder, 6-12 parts of ferric oxide fine powder and 4 parts of bonding agent according to parts by weight;
The spherical heat accumulator is formed by taking magnesium oxide as a main material, adding zirconium oxide and ferric oxide as auxiliary materials and sintering at high temperature;
Step two, pre-stirring the sintered magnesia particle aggregate and a binder (lignin liquid) for 10min;
Step three, mixing and stirring the sintered magnesia fine powder, the zirconia fine powder and the ferric oxide fine powder for 15min, pouring the mixture into the aggregate after stirring in step two, and stirring and mixing for 30min;
Pouring the materials mixed in the step three into a spherical mold (the radius of the spherical heat accumulator is 10-100 mm, and a spherical heat accumulator is manufactured every 10mm different in radius, and the total of 10 spherical heat accumulators with different radii) and pressing and forming under 600MPa under a four-column oil press;
step five, placing the pressed sample in a constant temperature drying oven at 80 ℃ for drying for 1-3 hours, and taking out;
and step six, burning the dried sample in a high-temperature muffle furnace at 1400-1600 ℃ for 5 hours to obtain the spherical heat accumulator (5).
Embodiment two:
The thermal shock resistant solid heat storage device sequentially comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom;
The upper end heat storage element comprises an upper positioning base (1), a spherical heat storage body (5) and an upper fixing clamp cover (2) from top to bottom in sequence;
The lower end heat storage element comprises a lower fixing clamp cover (4), a spherical heat accumulator (5) and a lower positioning base (3) from top to bottom in sequence;
the middle heat storage element comprises an upper fixing clamp cover (2), a spherical heat storage body (5) and a lower fixing clamp cover (4) from top to bottom in sequence;
An upper fixing clamp cover (2) in the upper end heat storage element is used as an upper fixing clamp cover (2) of an intermediate heat storage element adjacent to the upper end heat storage element;
a lower fixing clamp cover (4) in the lower end heat storage element is used as a lower fixing clamp cover (4) of an intermediate heat storage element adjacent to the lower end heat storage element;
the upper positioning base (1) is fixedly connected with the upper fixing clamp cover (2) and is used for fixing the spherical heat accumulator (5);
The lower positioning base (3) is fixedly connected with the lower fixing clamp cover (4) and is used for fixing the spherical heat accumulator (5);
the upper fixing clamp cover (2) and the lower fixing clamp cover (4) are fixedly connected and used for fixing the spherical heat accumulator (5);
The spherical heat accumulator (5) is tangential to the upper positioning base (1), and the spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2);
The spherical heat accumulator (5) is tangential to the lower positioning base (3), and the spherical heat accumulator (5) is intersected with the lower fixed clamping cover (4);
The spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2), and the spherical heat accumulator (5) is intersected with the lower fixing clamp cover (4);
the spherical heat accumulator (5) is prepared according to the following steps:
Weighing 60 parts of sintered magnesia granular aggregate, 26 parts of sintered magnesia fine powder, 5 parts of zirconia fine powder, 9 parts of ferric oxide fine powder and 4 parts of bonding agent according to parts by weight;
The spherical heat accumulator is formed by taking magnesium oxide as a main material, adding zirconium oxide and ferric oxide as auxiliary materials and sintering at high temperature;
Step two, pre-stirring the sintered magnesia particle aggregate and a binder (lignin liquid) for 10min;
Step three, mixing and stirring the sintered magnesia fine powder, the zirconia fine powder and the ferric oxide fine powder for 15min, pouring the mixture into the aggregate after stirring in step two, and stirring and mixing for 30min;
Pouring the materials mixed in the step three into a spherical mold (the radius of the spherical heat accumulator is 10-100 mm, and a spherical heat accumulator is manufactured every 10mm different in radius, and the total of 10 spherical heat accumulators with different radii) and pressing and forming under 600MPa under a four-column oil press;
step five, placing the pressed sample in a constant temperature drying oven at 80 ℃ for drying for 1-3 hours, and taking out;
And step six, the dried sample is subjected to heat preservation in a high-temperature muffle furnace for 5 hours at 1550 ℃ (the material is fully sintered and no chemical reaction which can generate adverse effects occurs), so that the spherical heat accumulator (5) is obtained.
Embodiment III:
The thermal shock resistant solid heat storage device sequentially comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom;
The upper end heat storage element comprises an upper positioning base (1), a spherical heat storage body (5) and an upper fixing clamp cover (2) from top to bottom in sequence;
The lower end heat storage element comprises a lower fixing clamp cover (4), a spherical heat accumulator (5) and a lower positioning base (3) from top to bottom in sequence;
the middle heat storage element comprises an upper fixing clamp cover (2), a spherical heat storage body (5) and a lower fixing clamp cover (4) from top to bottom in sequence;
An upper fixing clamp cover (2) in the upper end heat storage element is used as an upper fixing clamp cover (2) of an intermediate heat storage element adjacent to the upper end heat storage element;
a lower fixing clamp cover (4) in the lower end heat storage element is used as a lower fixing clamp cover (4) of an intermediate heat storage element adjacent to the lower end heat storage element;
the upper positioning base (1) is fixedly connected with the upper fixing clamp cover (2) and is used for fixing the spherical heat accumulator (5);
The lower positioning base (3) is fixedly connected with the lower fixing clamp cover (4) and is used for fixing the spherical heat accumulator (5);
the upper fixing clamp cover (2) and the lower fixing clamp cover (4) are fixedly connected and used for fixing the spherical heat accumulator (5);
The spherical heat accumulator (5) is tangential to the upper positioning base (1), and the spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2);
The spherical heat accumulator (5) is tangential to the lower positioning base (3), and the spherical heat accumulator (5) is intersected with the lower fixed clamping cover (4);
The spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2), and the spherical heat accumulator (5) is intersected with the lower fixing clamp cover (4);
the spherical heat accumulator (5) is prepared according to the following steps:
Weighing 60 parts of sintered magnesia granular aggregate, 22-34 parts of sintered magnesia fine powder, 0-6 parts of zirconia fine powder, 6-12 parts of ferric oxide fine powder and 4 parts of bonding agent according to parts by weight;
The spherical heat accumulator is formed by taking magnesium oxide as a main material, adding zirconium oxide and ferric oxide as auxiliary materials and sintering at high temperature;
Step two, pre-stirring the sintered magnesia particle aggregate and a binder (lignin liquid) for 10min;
Step three, mixing and stirring the sintered magnesia fine powder, the zirconia fine powder and the ferric oxide fine powder for 15min, pouring the mixture into the aggregate after stirring in step two, and stirring and mixing for 30min;
Pouring the materials mixed in the step three into a spherical mold with the radius of 30mm, and pressing and forming under 600MPa under a four-column oil press;
step five, placing the pressed sample in a constant temperature drying oven at 80 ℃ for drying for 1-3 hours, and taking out;
and step six, burning the dried sample in a high-temperature muffle furnace at 1400-1600 ℃ for 5 hours to obtain the spherical heat accumulator (5).
The present invention is capable of other and further embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. the utility model provides a thermal shock resistance solid heat accumulation device which characterized in that: the device comprises an upper end heat storage element, N middle heat storage elements and a lower end heat storage element from top to bottom in sequence; n is a positive integer;
The upper end heat storage element comprises an upper positioning base (1), a spherical heat storage body (5) and an upper fixing clamp cover (2) from top to bottom in sequence;
The lower end heat storage element comprises a lower fixing clamp cover (4), a spherical heat accumulator (5) and a lower positioning base (3) from top to bottom in sequence;
the middle heat storage element comprises an upper fixing clamp cover (2), a spherical heat storage body (5) and a lower fixing clamp cover (4) from top to bottom in sequence;
the upper positioning base (1) is fixedly connected with the upper fixing clamp cover (2) and is used for fixing the spherical heat accumulator (5);
The lower positioning base (3) is fixedly connected with the lower fixing clamp cover (4) and is used for fixing the spherical heat accumulator (5);
the upper fixing clamp cover (2) and the lower fixing clamp cover (4) are fixedly connected and used for fixing the spherical heat accumulator (5);
The spherical heat accumulator (5) is tangential to the upper positioning base (1), and the spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2);
The spherical heat accumulator (5) is tangential to the lower positioning base (3), and the spherical heat accumulator (5) is intersected with the lower fixed clamping cover (4);
The spherical heat accumulator (5) is intersected with the upper fixing clamp cover (2), and the spherical heat accumulator (5) is intersected with the lower fixing clamp cover (4);
The upper positioning base (1) and the lower positioning base (3) are heat-insulating fixed bases placed in a metal base;
The upper fixing clamp cover (2) and the lower fixing clamp cover (4) are metal cover shells with circular holes according to the size requirement of the spherical heat accumulator (5);
The two ends of the upper positioning base (1), the upper fixing clamp cover (2), the lower positioning base (3) and the lower fixing clamp cover (4) are provided with rolled 90-degree edges;
The upper positioning base (1) and the 90-degree edges rolled out from the two ends of the upper fixing clamp cover (2) are fixedly connected through screws (6) and are used for fixing the spherical heat accumulator (5);
the lower locating base (3) and the 90-degree edges rolled out from the two ends of the lower fixing clamp cover (4) are fixedly connected through screws (6) and are used for fixing the spherical heat accumulator (5);
The upper fixing clamp cover (2) and the lower fixing clamp cover (4) are fixedly connected through screws (6) at the edges of 90 degrees rolled out at the two ends, and are used for fixing the spherical heat accumulator (5);
The metal base is made of Hastelloy;
the heat-insulating fixed base is made of composite silicate heat-insulating materials;
the metal cover shell is made of cast steel;
the spherical heat accumulator (5) is prepared according to the following steps:
Weighing 60 parts of sintered magnesia granular aggregate, 22-34 parts of sintered magnesia fine powder, 0-6 parts of zirconia fine powder, 6-12 parts of ferric oxide fine powder and 4 parts of bonding agent according to parts by weight;
Step two, pre-stirring the sintered magnesia particle aggregate and the bonding agent for 10min;
The bonding agent is lignin liquid;
step three, mixing and stirring the sintered magnesia fine powder, the zirconia fine powder and the ferric oxide fine powder for 15min, pouring the mixture into the aggregate stirred in the step two, and stirring and mixing for 30min;
Pouring the materials mixed in the step three into a spherical mold with the radius of 30mm, and pressing and forming under 600MPa under a four-column oil press;
step five, placing the pressed sample in a constant temperature drying oven at 80 ℃ for drying for 1-3 hours, and taking out;
step six, burning the dried sample in a high-temperature muffle furnace at 1400-1600 ℃ for 5 hours to obtain a spherical heat accumulator (5);
The granularity of the sintered magnesia particle aggregate is less than 1mm and less than or equal to 0.088mm, the granularity of the sintered magnesia fine powder is less than or equal to 0.076mm, and the zirconia fine powder is nano monoclinic zirconia;
The bonding agent is lignin solution with mass fraction of 3%;
The spherical mold in the fourth step is one or more of spherical molds with the radius of 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm and 100 mm.
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| CN202648488U (en) * | 2012-06-06 | 2013-01-02 | 厦门霓阳环保科技有限公司 | Ceramic plate heat accumulator |
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