CN117109346B - Steam heat storage tank and heat preservation device thereof - Google Patents
Steam heat storage tank and heat preservation device thereof Download PDFInfo
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- CN117109346B CN117109346B CN202311388019.3A CN202311388019A CN117109346B CN 117109346 B CN117109346 B CN 117109346B CN 202311388019 A CN202311388019 A CN 202311388019A CN 117109346 B CN117109346 B CN 117109346B
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- 238000005338 heat storage Methods 0.000 title claims abstract description 102
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- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical group [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000378 calcium silicate Substances 0.000 claims description 15
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 15
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 15
- 238000004146 energy storage Methods 0.000 claims description 11
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
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- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
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- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- 239000002202 Polyethylene glycol Substances 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
-
- 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
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
-
- 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
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
Abstract
The invention provides a steam heat storage tank and a heat preservation device thereof, wherein the heat preservation device comprises: the vacuum layer is arranged on the outer wall of the steam heat storage tank, wherein a first heat insulation layer is laid from the top of the outer wall of the steam heat storage tank to the highest liquid level, a second heat insulation layer is laid from the highest liquid level of the steam heat storage tank to the lowest liquid level, a third heat insulation layer is laid from the lowest liquid level to the bottom of the steam heat storage tank, and the heat conductivity coefficient of the second heat insulation layer is smaller than that of the first heat insulation layer and smaller than that of the third heat insulation layer; the packaging layer is arranged at the joint between the first heat preservation layer and the third heat preservation layer; and the fourth heat preservation layer is laid outside the vacuum layer, so that the whole heat preservation device is in a high vacuum state. According to the invention, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, so that a non-uniform heat preservation strategy is formed, and heat preservation materials in different areas are different, so that heat insulation and economy are both considered, and the heat loss of the steam heat storage tank is reduced to the greatest extent.
Description
Technical Field
The invention relates to the technical field of heat conduction, in particular to a heat preservation device of a steam heat storage tank and the steam heat storage tank.
Background
The industrial energy consumption is the largest energy consumption industry in China at present, and along with the proposal of the 'carbon neutralization and carbon peak reaching' target, the realization of high-efficiency utilization of energy sources and the reduction of energy source waste are important ways and means for developing low-carbon economy at present. In the high-temperature industrial fields of thermal power, chemical industry, petroleum and the like, redundant heat energy can be stored through a certain medium and utilized as required, so that the contradiction that heat energy supply and demand are not matched in time and space is solved, and the utilization rate of energy is improved. In this process, various heat-insulating devices have been developed in order to reduce heat loss as much as possible.
At present, the heat preservation of the steam heat storage tank is mostly carried out in an integrated heat preservation mode, namely, the change in the pressure vessel is not considered, and various organic, inorganic or nano heat insulation materials are directly wrapped on the whole outer wall. However, the heat loss of each part of the steam heat storage tank is different, if the whole steam heat storage tank is made of heat insulation materials with small heat conductivity, the cost is greatly increased due to the large volume of the steam heat storage tank, and if the steam heat storage tank is made of heat insulation materials with larger heat conductivity, the heat insulation performance cannot be ensured in the area (such as the top) with larger heat loss of the steam heat storage tank although the cost can be reduced to a certain extent.
Therefore, how to provide a heat preservation mode with heat insulation and economy is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a heat preservation device of a steam heat storage tank, which can maximally reduce the heat loss of the steam heat storage tank while considering heat insulation and economy.
The invention also provides a steam heat storage tank.
The technical scheme adopted by the invention is as follows:
an embodiment of a first aspect of the present invention provides a thermal insulation device for a steam heat storage tank, including: the vacuum layer is arranged on the outer wall of the steam heat storage tank, different heat preservation layers are laid in the vacuum layer to the outer wall of the steam heat storage tank according to the liquid level height of the steam heat storage tank, wherein a first heat preservation layer is laid from the top of the outer wall of the steam heat storage tank to the highest liquid level, a second heat preservation layer is laid from the highest liquid level to the lowest liquid level of the steam heat storage tank, a third heat preservation layer is laid from the lowest liquid level to the bottom of the steam heat storage tank, and the heat conductivity coefficient of the second heat preservation layer is smaller than that of the first heat preservation layer; the packaging layer is arranged at the joint of the first heat preservation layer, the second heat preservation layer and the third heat preservation layer so as to isolate materials; and the fourth heat preservation layer is laid outside the vacuum layer, so that the whole heat preservation device is in a high vacuum state.
The heat preservation device of the steam heat storage tank provided by the invention also has the following additional technical characteristics:
according to one embodiment of the invention, the first heat-insulating layer is of a composite multi-layer structure, and the first layer of the first heat-insulating layer is made of composite nano SiO 2 (silicon dioxide, an inorganic compound) aerogel and microporous calcium silicate balls are selected as the second layer.
According to one embodiment of the invention, the second heat-insulating layer is of a multi-layer composite structure, and the first layer of the second heat-insulating layer close to the outer wall is composite nano SiO 2 The second layer is aluminum silicate fiber knitting felt, and the third layer is microporous calcium silicate balls.
According to one embodiment of the invention, the thermal insulation material selected for the third thermal insulation layer is microporous calcium silicate spheres.
According to one embodiment of the invention, the composite nano SiO 2 The aerogel is compounded with inorganic cementing material in the form of slurry, the inorganic cementing material is gypsum and is doped with cement, fly ash and lime to modify the gypsum, and the composite nano SiO 2 The thickness of the aerogel is 4.9cm to 5.1cm.
According to one embodiment of the invention, the thickness of the aluminum silicate fiber needled felt is 9-11cm.
According to one embodiment of the invention, the microporous calcium silicate spheres are fixed in a point contact manner using an adhesive.
According to one embodiment of the invention, the fourth heat preservation layer is sequentially wrapped by aluminum foil, glass fiber paper, glass cloth and nylon net.
According to an embodiment of the present invention, the heat preservation device further includes: the phase-change energy storage layer is laid outside the fourth heat preservation layer.
An embodiment of the second aspect of the present invention provides a steam heat storage tank, which includes the heat preservation device of the steam heat storage tank according to the embodiment of the first aspect of the present invention.
The invention has the following beneficial effects:
1. according to the invention, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, a non-uniform heat preservation strategy is formed, three parts of the outer wall of the steam heat storage tank are subjected to target heat preservation, heat preservation materials in different areas are different, heat insulation performance and economy are both considered, and meanwhile, the heat loss of the steam heat storage tank is reduced to the greatest extent.
2. According to the invention, three layers of composite heat-insulating materials are adopted between the highest liquid level and the lowest liquid level with larger phase change, so that the heat dissipation loss is reduced and the heat energy utilization rate is improved under the condition of less material consumption.
3. According to the invention, the phase-change energy storage layer is added on the outermost layer, so that heat dissipation is stored to the greatest extent, and when the steam load is insufficient, the phase-change layer releases phase-change latent heat as supplement, so that the energy utilization rate is improved.
Drawings
Fig. 1 is a schematic structural view of a thermal insulation device of a steam heat storage tank according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a first insulation layer according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a second insulation layer according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a thermal insulation device of a steam heat storage tank according to another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes a heat preservation device of a steam heat storage tank and the steam heat storage tank according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a thermal insulation device of a steam heat storage tank according to an embodiment of the present invention. As shown in fig. 1, the steam heat storage tank mainly comprises a tank body 1, a steam inlet 2, a safety valve seat 3, an exhaust port 4, a manhole 5, a rolling support 6, a fixed support 7, a drain valve 8, a liquid level meter 9, a circulation guide cylinder 10, a steam nozzle 11 and the like. The heat preservation device includes: a vacuum layer 15, an encapsulation layer 17 and a fourth insulation layer 16.
Wherein, vacuum layer 15 is arranged in the outer wall of steam heat accumulation jar body 1, lay different heat preservation according to steam heat accumulation jar's liquid level height in the outer wall of vacuum layer 15 to steam heat accumulation jar, wherein, steam heat accumulation jar outer wall top to the highest liquid level part lay first heat preservation 12, steam heat accumulation jar's highest liquid level to the lowest liquid level part lay second heat preservation 13, the lowest liquid level is to heat accumulation jar bottom part lay third heat preservation 14, and the heat conductivity of second heat preservation 13 < heat conductivity of first heat preservation 12 < heat conductivity of third heat preservation 14. The encapsulation layer 17 is provided at the junction between the first heat-insulating layer 12, the second heat-insulating layer 13, and the third heat-insulating layer 14 for material isolation. The fourth insulation layer 16 is laid outside the vacuum layer 15 so that the whole insulation device is in a high vacuum state.
Specifically, when the steam load of the steam heat storage tank is smaller than the evaporation capacity of the boiler, redundant steam enters a steam main pipe and branch pipes of the steam heat storage tank through a steam inlet 2, and the steam is sprayed out of a steam nozzle 11 to be contacted with heat carrier water, so that the latent heat of vaporization is released, and the saturated water with a certain pressure is changed into saturated water for storage. In the process of heat filling, the water temperature in the container is increased, the pressure is increased, and the liquid level is increased. When the charging process is finished, the highest liquid level is recorded by the liquid level meter 9. When the steam load is larger than the evaporation capacity of the boiler, the pressure in the steam exhaust pipe in the heat storage tank is reduced, the steam rushes out of the steam exhaust valve to supply heat, the pressure in the container is reduced, the saturated water temperature is higher than the corresponding saturated temperature after depressurization to become superheated steam, residual heat is formed, and the deficiency of air supply is compensated. At this time, the pressure, temperature and water level in the container all decrease. When the exothermic process is finished, the lowest level is recorded with the level gauge 9.
It follows that the charging and discharging of heat in the steam accumulator tank is a dynamic phase change process, with a periodic strong heat and mass exchange between the highest and lowest liquid levels. Therefore, the areas of the highest liquid level and the lowest liquid level of the outer wall of the steam heat storage tank are the portions where the heat dissipation loss is large. In addition, according to the prior art, the water temperature stratification phenomenon exists at the top of the heat storage tank due to the suction and discharge of the steam, which is disadvantageous for the steam heat storage tank, so that the heat dissipation at the top of the heat storage tank is also required to be emphasized. Therefore, according to the invention, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, a non-uniform heat preservation strategy is formed, three parts of the outer wall of the steam heat storage tank are subjected to target heat preservation, heat preservation materials in different areas are different, the material cost is high, the heat conductivity is low, the heat preservation performance is good, and the heat conductivity coefficients of the first to third heat preservation layers 12-14 are considered in combination with the economical efficiency and the heat preservation performance: the heat conductivity coefficient of the second heat preservation layer is less than that of the first heat preservation layer and less than that of the third heat preservation layer. The first heat preservation layer 12, the second heat preservation layer 13 and the third heat preservation layer 14 are isolated by the packaging layer 17, so that material mixing among different heat preservation layers is avoided.
Therefore, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, a non-uniform heat preservation strategy is formed, three parts of the outer wall of the steam heat storage tank are subjected to target heat preservation, heat preservation materials in different areas are different, heat insulation performance and economy are considered, and meanwhile heat loss of the steam heat storage tank is reduced to the greatest extent.
FIG. 2 is a schematic cross-sectional view of a first thermal insulation layer according to an embodiment of the present invention, as shown in FIG. 2, in which the first thermal insulation layer 12 is a composite multi-layer structure, and the first layer 101 of the first thermal insulation layer 12 is a composite nano SiO 2 The second layer 102 of the aerogel, first thermal insulation layer 12 is selected from microporous calcium silicate spheres. The dotted line in FIG. 2 represents the axis of the steam heat storage tank, r A0 Is the outer diameter of the steam heat storage tank; r is (r) A1 The distance from the axis of the steam heat storage tank to the outer wall of the first layer of the first heat preservation layer is set; r is (r) A2 Is the distance r between the axis of the steam heat storage tank and the outer wall of the second layer of the first heat preservation layer A3 Is the distance r between the axis of the steam heat storage tank and the outer wall of the vacuum layer A4 The distance from the axis of the steam heat storage tank to the outer wall of the fourth heat preservation layer.
The second insulating layer 13 may be simplified to be a multilayer cylindrical wall conducting heat. If the heat dissipation of the steam heat storage tank is small under other conditions, the material with small heat conductivity coefficient of the second heat-insulating layer 13 closest to the outer wall of the pressure vessel needs to be selected. From the standpoint of comprehensive economy and thermal insulation performance, the thermal conductivity of the thermal insulation material disposed from the outer wall of the steam heat storage tank to the outside of the second thermal insulation layer 13 should be: lambda (lambda) 1 <λ 2 <λ 3 . As a specific example, fig. 3 is a schematic cross-sectional structure of a second heat-insulating layer according to an embodiment of the present invention, as shown in fig. 3, the second heat-insulating layer 13 is a multi-layer composite structure, and the first layer 201 of the second heat-insulating layer 13 adjacent to the outer wall may be a composite nano SiO 2 The second layer 202 of the second thermal insulation layer can be aluminum silicate fiber knitted felt, and the third layer 203 of the second thermal insulation layer can be microporous siliconAcid calcium balls. The dotted line in FIG. 3 represents the axis of the steam heat storage tank, r B0 The distance from the axis of the steam heat storage tank to the inner wall of the first layer of the second heat preservation layer; r is (r) B1 The distance from the axis of the steam heat storage tank to the outer wall of the first layer of the second heat preservation layer is set; r is (r) B2 Is the distance r between the axis of the steam heat storage tank and the outer wall of the second layer of the second heat insulation layer B3 Is the distance r between the axis of the steam heat storage tank and the outer wall of the third layer of the second heat preservation layer B4 The distance r between the axis of the steam heat storage tank and the outer wall of the vacuum layer B5 Is the distance from the axis of the steam heat storage tank to the outer wall of the fourth heat preservation layer.
In one embodiment of the present invention, the insulating material selected for the third insulating layer 14 is microporous calcium silicate spheres.
It can be appreciated that composite nano SiO 2 Aerogel is SiO 2 Composite thermal insulation material of aerogel and inorganic cementing material. Although SiO 2 Aerogel having extremely low density, extremely small pore size and extremely low insulation coefficient is the best known material for heat insulation but is expensive and impractical for industrial use over large areas, so in one embodiment of the invention, siO 2 The aerogel is embedded into the inorganic cementing material, namely the composite nano SiO 2 The aerogel is compounded with the inorganic gelling material in the form of a slurry.
However, siO 2 When the aerogel is embedded into the inorganic cementing material, the composite material has poor uniformity due to strong hydrophobicity and no chemical bond connection, and the phenomena of floating, agglomeration and crushing appear. To solve this problem, first of all SiO 2 Pretreating aerogel and inorganic cementing materials, placing tetraethoxysilane, absolute ethyl alcohol and deionized water into an conical flask, uniformly stirring, and ultrasonically oscillating for 5min, wherein the mass fractions are 35%, 55% and 10% respectively; adding 1mol/L hydrochloric acid into a bottle to adjust the pH value to 2-3, standing for 2 hours, adding 1mol/L ammonia water to adjust the pH value to be neutral, waiting for the system to reach a gel state, adding polyethylene glycol serving as a surface pretreatment agent with the mass fraction of 10% into a conical bottle, shaking uniformly, and standing for 12 hours to enable SiO to be obtained 2 The aerogel surface is changed from a hydrophobic state to a hydrophilic state and is uniformly dispersedInto aqueous solution to form SiO 2 Aerogel slurries. The inorganic cementing material is gypsum, cement, fly ash and lime are doped into unhardened gypsum, and the mixture is uniformly mixed to form a hydraulic framework, so that the compactness of the gypsum is improved, and the aim of modification is fulfilled, so that the compressive strength and the water resistance of the gypsum are enhanced. Wherein, the mass ratio of gypsum, cement, fly ash and lime is: 65:20:10:5. Thereafter, siO is added 2 The aerogel slurry and the inorganic cementing material are mixed with each other, and the mass ratio is 3:10. Treated composite nano SiO 2 Aerogel is used as a first layer of the first heat preservation layer 12 and the second heat preservation layer 13, and is measured to be compounded with nano SiO 2 Thermal conductivity coefficient lambda of aerogel 1 =0.027 (W/m·k), the thickness can be 4.9 cm-5.1 cm, for example 5cm.
The material of the second layer 202 of the second heat-insulating layer 13 is aluminum silicate fiber knitting felt, and the preparation process of the material is as follows: the aluminum silicate fiber is subjected to deslagging treatment to obtain pure aluminum silicate fiber, and the pure aluminum silicate fiber is subjected to ultrasonic dispersion to obtain uniformly dispersed fiber. Mixing the uniformly dispersed aluminum silicate fibers and the aluminum sol solution, mechanically stirring for 5min, and then vacuum filtering to prepare the aluminum silicate fiber knitted felt. Because the aluminum silicate fiber and the aluminum sol have basically the same composition components, the compatibility is good, the fiber does not participate in the reaction, the mass concentration of the aluminum sol solution is 20%, the mass fraction of the aluminum silicate fiber is 60%, the aluminum sol is polymerized into a three-dimensional network-shaped framework from the original dispersed structure, the aluminum silicate fiber is uniformly coated, and the aluminum silicate fiber can keep better heat insulation performance and mechanical strength at high temperature. In addition, the vacuum pump has a smaller mass and can be arranged in a limited space, namely a vacuum layer. Its heat conductivity coefficient and composite nano SiO 2 Aerogel is slightly larger than that of the steam heat storage tank, but the price is more advantageous, and the temperature is not as high as that of the steam heat storage tank after the first layer 201 of the second heat preservation layer 13 blocks most of heat, so that the steam heat storage tank can play a role in a middle-high temperature section. Measured heat conductivity coefficient lambda of aluminum silicate fiber knitted felt 2 =0.0457 (W/m·k), thickness 9-11cm, e.g. 10cm.
In an embodiment of the present invention, the second layer 202, the second thermal insulation layer of the first thermal insulation layer 1213 and the third heat insulating layer 14, wherein microporous calcium silicate balls are arranged, because the contact mode between the calcium silicate balls is point contact, the flow of the heat insulating layer is easy to occur, and the heat conducting property is affected, so that a small amount of adhesive (such as polydimethylsiloxane) is required to fix the microporous calcium silicate balls in a point contact mode. The thermal conductivity coefficient lambda of the microporous calcium silicate balls is measured 3 The thicknesses of the microporous calcium silicate spheres in the first to third heat insulating layers 12 to 14 were 20cm, 10cm, and 25cm, respectively, =0.12W/(m·k).
In the embodiment of the invention, the fourth heat-insulating layer 16 is wrapped by aluminum foil, glass fiber paper, glass cloth and nylon net in sequence, so that the whole internal system can be in a high vacuum state.
In order to further improve the heat preservation effect, in order to meet the industrial energy-saving requirement and ensure that the temperature of the outer wall of the pipeline does not exceed 50 ℃, according to one embodiment of the present invention, as shown in fig. 4, the heat preservation device of the steam heat storage tank may further include: the phase-change energy storage layer 18, the phase-change energy storage layer 18 is laid outside the fourth heat preservation layer 16.
Specifically, the phase-change material of the phase-change energy storage layer 18 is selected from phase-change microcapsules, and the type of the selected phase-change microcapsules is PF39035 temperature-regulating phase-change microcapsules. Based on the industrial energy-saving requirement, the phase transition temperature interval is 25-60 ℃. The wall material of the phase-change microcapsule is SiO 2 The method has the advantages that the chemical and thermal stability is good, the built-in phase change material can be shaped and coated, leakage is avoided, and the heat storage and release performance of the material is improved; the core material of the phase-change microcapsule can be a binary composite phase-change energy storage medium of n-octadecane and docosane (the mass ratio of n-octadecane to docosane is 6:4). The phase-change microcapsule and the carrier desulfurized gypsum are uniformly stirred according to the mass ratio of 1:1 to form a continuous phase, wherein the heat conductivity coefficient is 0.451W/(m.K) and the thickness is 6cm. The phase change energy storage layer 18 can store the dissipated heat in the form of phase change latent heat, and when the steam load is insufficient, the temperature is reduced, and the energy is released to supplement, so that the temperature of the outer wall of the pipeline can be ensured.
For example, the length of the steam heat storage tankL15m, diameterD3m, the end socket is a hemisphereShape. The heat transfer resistance per unit of the first heat-preserving layer 12 of the steam heat-accumulating tank can be regarded as heat conduction of the multi-layer cylinder wall, the second heat-preserving layer 13 and the third heat-preserving layer 14 are laid in the same way, and the heat transfer resistance per unit of the first heat-preserving layer 12R A The method comprises the following steps:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein r is A0 Is the outer diameter of the steam heat storage tank; r is (r) A1 The distance from the axis of the steam heat storage tank to the outer wall of the first layer of the first heat preservation layer is set; r is (r) A2 Is the distance from the axis of the steam heat storage tank to the outer wall of the second layer of the first heat preservation layer.
The thermal resistance of the vacuum layer 15 of the steam heat storage tank comprises surface radiation thermal resistance, space radiation thermal resistance and heat conduction thermal resistance, and the unit thermal resistance R thereof va The method comprises the following steps:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein the emissivity of the microporous calcium carbonate layer isε 1 The method comprises the steps of carrying out a first treatment on the surface of the The emissivity of the fourth heat preservation layer isε 2 ；X 1,2 Is the angular coefficient, r, between the microporous calcium carbonate layer and the fourth insulation layer 16 A4 Lambda is the distance from the axis of the steam heat storage tank to the outer wall of the fourth heat insulation layer 16 4 Is the heat conductivity coefficient of the fourth heat preservation layer.
Thermal resistance of phase-change energy storage layer of steam heat storage tankR E The method comprises the following steps:
wherein r is E Lambda is the distance from the axis of the steam heat storage tank to the outer side of the phase change energy storage layer 5 Is the heat conductivity coefficient of the phase change energy storage layer.
In summary, according to the heat preservation device of the steam heat storage tank provided by the embodiment of the invention, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, so that a non-uniform heat preservation strategy is formed, three parts of the outer wall of the steam heat storage tank are subjected to target heat preservation, heat preservation materials in different areas are different, heat insulation performance and economy are both considered, and meanwhile, the heat loss of the steam heat storage tank is reduced to the greatest extent.
In addition, the invention also provides a steam heat storage tank, which comprises the heat preservation device of the steam heat storage tank.
According to the steam heat storage tank provided by the embodiment of the invention, through the heat preservation device, different heat preservation layers are adopted according to the liquid level change of the steam heat storage tank, so that a non-uniform heat preservation strategy is formed, three parts of the outer wall of the steam heat storage tank are subjected to target heat preservation, heat preservation materials in different areas are different, heat insulation performance and economy are both considered, and meanwhile, the heat loss of the steam heat storage tank is reduced to the greatest extent.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A thermal insulation device for a steam heat storage tank, comprising:
the vacuum layer is arranged on the outer wall of the steam heat storage tank, different heat preservation layers are laid in the vacuum layer to the outer wall of the steam heat storage tank according to the liquid level height of the steam heat storage tank, wherein a first heat preservation layer is laid from the top of the outer wall of the steam heat storage tank to the highest liquid level, a second heat preservation layer is laid from the highest liquid level to the lowest liquid level of the steam heat storage tank, a third heat preservation layer is laid from the lowest liquid level to the bottom of the steam heat storage tank, and the heat conductivity coefficient of the second heat preservation layer is smaller than that of the first heat preservation layer;
the packaging layer is arranged at the joint of the first heat preservation layer, the second heat preservation layer and the third heat preservation layer so as to isolate materials;
a fourth heat-insulating layer laid on the vacuumThe outer part of the layer is used for leading the whole heat preservation device to be in a high vacuum state; the first heat preservation layer is of a composite multi-layer structure, and the first layer of the first heat preservation layer is made of composite nano SiO 2 The aerogel and the second layer adopt microporous calcium silicate balls; the second heat-insulating layer is of a multi-layer composite structure, and the first layer of the second heat-insulating layer close to the outer wall is composite nano SiO 2 Aerogel, wherein the second layer is aluminum silicate fiber knitted felt, and the third layer is microporous calcium silicate balls; the heat-insulating material selected by the third heat-insulating layer is microporous calcium silicate balls.
2. The thermal insulation device of a steam heat storage tank according to claim 1, wherein the composite nano SiO 2 The aerogel is compounded with inorganic cementing material in the form of slurry, the inorganic cementing material is gypsum, cement, fly ash and lime are doped in the gypsum to modify the gypsum, and the composite nano SiO 2 The thickness of the aerogel is 4.9cm to 5.1cm.
3. The thermal insulation device of a steam heat storage tank according to claim 2, wherein the thickness of the aluminum silicate fiber knitted felt is 9-11cm.
4. A thermal insulation device for a steam heat storage tank according to any one of claims 1 to 3, wherein the microporous calcium silicate balls are fixed in a point contact manner by an adhesive.
5. The thermal insulation device of the steam heat storage tank according to claim 1, wherein the fourth thermal insulation layer is sequentially wrapped by aluminum foil, glass fiber paper, glass cloth and nylon net.
6. The thermal insulation device of a vapor thermal storage tank of claim 1, further comprising: the phase-change energy storage layer is laid outside the fourth heat preservation layer.
7. A steam heat storage tank comprising a thermal insulation device of the steam heat storage tank according to any one of claims 1 to 6.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162791A (en) * | 1984-09-05 | 1986-03-31 | Nippon Kokan Kk <Nkk> | Heat accumulating and heat exchanging device |
| EP0279302A1 (en) * | 1987-02-18 | 1988-08-24 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Layered heat storer |
| JP2009097746A (en) * | 2007-10-15 | 2009-05-07 | Panasonic Corp | Heat storage device |
| CN103759565A (en) * | 2013-12-31 | 2014-04-30 | 河南圣石节能环保工程有限公司 | Phase change heat storage and steam heat storage combined spherical heat accumulator |
| CN105115336A (en) * | 2015-09-07 | 2015-12-02 | 河北艺能锅炉有限责任公司 | Molten salt thermal storage heater |
| CN109323227A (en) * | 2017-09-14 | 2019-02-12 | 山东交通学院 | A kind of steam generator of heat conductivity of vacuum insulation panel variation |
| CN208935657U (en) * | 2018-09-30 | 2019-06-04 | 济南火龙热陶瓷有限责任公司 | A kind of environment-friendly type power plant pipe insulating layer |
| CN110186303A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院理化技术研究所 | Accumulation of heat/cooler |
| CN112082400A (en) * | 2020-09-27 | 2020-12-15 | 广州大学 | Heat exchanger and heat exchanger system |
| CN113375492A (en) * | 2021-05-31 | 2021-09-10 | 中国科学院理化技术研究所 | Vacuum heat-insulation type heat storage/cooling device |
| CN114485244A (en) * | 2022-02-14 | 2022-05-13 | 中国电建集团华东勘测设计研究院有限公司 | Thermal diode, thermal rectifying coating, phase-change heat storage and supply device and heat monitoring method |
| CN114704822A (en) * | 2022-04-21 | 2022-07-05 | 国网江苏省电力有限公司常州供电分公司 | Control method and device of electric heating steam boiler system |
| CN115096120A (en) * | 2022-06-14 | 2022-09-23 | 国网江苏省电力有限公司常州供电分公司 | Parameter design method of steam heat accumulator based on phase change theory |
| CN219454793U (en) * | 2023-03-28 | 2023-08-01 | 浙江嘉熙科技股份有限公司 | Superconductive composite phase-change heat accumulating plate type hot water unit and hot water device |
| US11761711B1 (en) * | 2022-04-21 | 2023-09-19 | Beijing Minli Energy Storage Technology Co., Ltd. | Heat storage and heat release system for molten salt with steam heating |
-
2023
- 2023-10-25 CN CN202311388019.3A patent/CN117109346B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162791A (en) * | 1984-09-05 | 1986-03-31 | Nippon Kokan Kk <Nkk> | Heat accumulating and heat exchanging device |
| EP0279302A1 (en) * | 1987-02-18 | 1988-08-24 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Layered heat storer |
| JP2009097746A (en) * | 2007-10-15 | 2009-05-07 | Panasonic Corp | Heat storage device |
| CN103759565A (en) * | 2013-12-31 | 2014-04-30 | 河南圣石节能环保工程有限公司 | Phase change heat storage and steam heat storage combined spherical heat accumulator |
| CN105115336A (en) * | 2015-09-07 | 2015-12-02 | 河北艺能锅炉有限责任公司 | Molten salt thermal storage heater |
| CN109323227A (en) * | 2017-09-14 | 2019-02-12 | 山东交通学院 | A kind of steam generator of heat conductivity of vacuum insulation panel variation |
| CN208935657U (en) * | 2018-09-30 | 2019-06-04 | 济南火龙热陶瓷有限责任公司 | A kind of environment-friendly type power plant pipe insulating layer |
| CN110186303A (en) * | 2019-05-22 | 2019-08-30 | 中国科学院理化技术研究所 | Accumulation of heat/cooler |
| CN112082400A (en) * | 2020-09-27 | 2020-12-15 | 广州大学 | Heat exchanger and heat exchanger system |
| CN113375492A (en) * | 2021-05-31 | 2021-09-10 | 中国科学院理化技术研究所 | Vacuum heat-insulation type heat storage/cooling device |
| CN114485244A (en) * | 2022-02-14 | 2022-05-13 | 中国电建集团华东勘测设计研究院有限公司 | Thermal diode, thermal rectifying coating, phase-change heat storage and supply device and heat monitoring method |
| CN114704822A (en) * | 2022-04-21 | 2022-07-05 | 国网江苏省电力有限公司常州供电分公司 | Control method and device of electric heating steam boiler system |
| US11761711B1 (en) * | 2022-04-21 | 2023-09-19 | Beijing Minli Energy Storage Technology Co., Ltd. | Heat storage and heat release system for molten salt with steam heating |
| CN115096120A (en) * | 2022-06-14 | 2022-09-23 | 国网江苏省电力有限公司常州供电分公司 | Parameter design method of steam heat accumulator based on phase change theory |
| CN219454793U (en) * | 2023-03-28 | 2023-08-01 | 浙江嘉熙科技股份有限公司 | Superconductive composite phase-change heat accumulating plate type hot water unit and hot water device |
Non-Patent Citations (2)
| Title |
|---|
| 基于ANSYS的小型双罐储热系统模拟研究;李亚楠;杜中玲;陈九法;;发电设备(01);第18-23页 * |
| 基于电蒸汽蓄热锅炉的新能源消纳方法研究;袁俊球 等;机械与电子;全文 * |
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