CN111780604B - Basalt fiber thermal oxidizer heat accumulator - Google Patents
Basalt fiber thermal oxidizer heat accumulator Download PDFInfo
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- CN111780604B CN111780604B CN202010483861.5A CN202010483861A CN111780604B CN 111780604 B CN111780604 B CN 111780604B CN 202010483861 A CN202010483861 A CN 202010483861A CN 111780604 B CN111780604 B CN 111780604B
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- basalt fiber
- heat accumulator
- basalt
- fiber bundle
- thermal oxidizer
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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
- 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
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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
- F28D2020/0004—Particular heat storage apparatus
- F28D2020/0017—Particular heat storage apparatus the heat storage material being enclosed in porous or cellular or fibrous structures
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- 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)
- Woven Fabrics (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a basalt fiber thermal oxidizer heat accumulator, which comprises: the heat accumulator with a cubic structure adopts a woven device taking basalt fibers as basic units, the interior of the heat accumulator is formed by arranging elliptic cylindrical basalt fiber bundle groups, and a main flow passage is formed among the bundle groups; the single basalt fiber bundle group is formed by arranging basalt fiber bundles, and a secondary flow channel is formed between the bundles; the single basalt fiber bundle is formed by twisting the basalt fibers in a specific twisting number after the basalt fibers in micron order are tightly arranged. The invention can process gas under the condition of larger flow rate, the gas processing capacity of the heat accumulator with the same volume in unit time is greatly improved, the system obtains better stability, and the volume of the heat accumulator required for achieving the same processing capacity is obviously reduced, thereby ensuring that the whole occupied area of the RTO device is smaller, and being beneficial to the practical application of the device.
Description
Technical Field
The invention relates to the technical field of heat storage, in particular to a basalt fiber thermal oxidizer heat accumulator.
Background
The problem of environmental pollution caused by industrial development is of great concern, wherein waste gas generated in the production process is one of the greatest causes of pollution. Effective treatment of industrial waste gas is an essential part of the establishment of a sustainable society. At present, for the purification of volatile organic waste gas, RTO is an energy-saving system with mature technology and common application, has high purification efficiency and thermal efficiency, and is suitable for treating organic waste gas with various components and concentrations. In RTO, the thermal storage medium is a key technology that affects its operating performance and economic efficiency.
At present, in practical application, a honeycomb ceramic medium is generally adopted as a heat storage material to be installed in an RTO (regenerative thermal oxidizer), and the honeycomb ceramic medium has the advantages of good durability, small pressure loss, stable operation and the like, but the longitudinal flow and the flow velocity of fluid are low, the gas treatment capacity of the unit fluid cross section in unit time is not large enough, and the service life of a honeycomb body is short. Therefore, there is significant engineering and economic value in developing an RTO that employs a novel thermal mass to overcome these disadvantages.
The basalt fiber is a high-performance inorganic fiber prepared from basalt ore naturally existing in the earth crust through high-temperature melting and wire drawing processes, and has the advantages of wide raw materials, low energy consumption in the production process, no pollution, economy and environmental friendliness. The basalt fiber has good high-temperature stability, excellent mechanical property and high energy storage density, and has great potential when being applied to the thermal engineering field. However, the low thermal conductivity is a limiting condition in the application direction, and the heat transfer enhancement needs to be carried out by certain means.
Disclosure of Invention
The invention aims to solve the technical problem of providing a basalt fiber thermal oxidizer heat accumulator, which has small integral occupied area and is beneficial to the practical application of the device.
In order to solve the technical problem, the invention provides a basalt fiber thermal oxidizer heat accumulator, which comprises: the heat accumulator with a cubic structure adopts a woven device taking basalt fibers as basic units, the interior of the heat accumulator is formed by arranging elliptic cylindrical basalt fiber bundle groups, and a main flow passage is formed among the bundle groups; the single basalt fiber bundle group is formed by arranging basalt fiber bundles, and a secondary flow channel is formed between the bundles; the single basalt fiber bundle is formed by twisting the basalt fibers in a specific twisting number after the basalt fibers in micron order are tightly arranged.
Preferably, the heat accumulator has a basic unit of basalt fiber with a diameter of 5 to 25 μm.
Preferably, the basalt fiber is twisted into a basalt fiber bundle having a diameter d of 1 to 10mm with a twist number of 5 to 200 twists.
Preferably, the distance S between the basalt fiber bundles in the direction perpendicular to the flow channel11.2-4d, parallel flow channel direction spacing S2The two-stage flow channels are arranged in the same row as 1.2-4d to form a secondary flow channel.
Preferably, n (value 10-200) basalt fiber bundles are arranged to form a long shaft D1＝(n-1)×S1+ D, minor axis D2＝(n-1)×S2+ d of basalt fiber bundle group in an elliptical cylindrical shape.
Preferably, the basalt fiber bundle groups are arranged at a distance (0.3-8) D in the vertical flow passage direction1Between the parallel flow passage directions (0.3-8) D2The fork rows are arranged to form the main flow channel.
Preferably, the two ends of the basalt fiber bundle are fixed, and are tensioned into a chord structure by applying prestress.
Preferably, the basalt fiber bundle group is arranged in a direction perpendicular to the flowing direction of the gas, and two ends of the basalt fiber bundle group are hinged and fixed on the shell, so that the gas flows in a transverse sweeping mode.
The invention has the beneficial effects that: (1) the basalt fiber has good chemical corrosion resistance, can ensure environmental compatibility and durability in application scenes such as combustible waste gas treatment and the like, has excellent fire resistance and high-temperature stability, has a wide working temperature range, can still retain certain strength and higher elastic modulus even at 800 ℃, has good dimensional stability, and can meet the use requirement under the RTO high-temperature condition; (2) the basalt fiber bundle is twisted, so that the stress consistency of the basalt fiber is improved, the mechanical property and the service life of the basalt fiber bundle are further improved, the basalt fiber bundle is a flexible device, the mechanical strength is high, the elasticity and the toughness are good, and the basalt fiber bundle is allowed to deform greatly during working, so that the release of temperature stress is facilitated, and the service life is prolonged due to the fact that the temperature stress generated under the high-temperature working condition is small; (3) the basic heat storage and exchange unit of the heat accumulator is a low-dimensional device, the biot number is very low, the solid thermal resistance is negligible, and the internal temperature distribution tends to be consistent, so that the heat transfer from the inside of the device to the surface is fast; (4) the low-dimensional device adopts a woven device, and tiny bulges similar to fins are formed on the surface of the low-dimensional device, so that a heat transfer boundary layer is damaged, and the heat transfer effect is enhanced; (5) the exhaust gas sweeps across the basalt fiber bundles for heat exchange, the fluid-solid surface heat exchange coefficient is increased, the specific surface area of the basalt fiber bundle group is large, the fluid-solid heat exchange is enhanced, gaps among the basalt fiber bundle groups are large, and the gas after heat exchange can be quickly discharged; (6) can be at the handled gas under the great velocity of flow condition, the same volume heat accumulator obtains promoting greatly at unit interval gas handling capacity, and the system obtains better stability, and for reaching the same handling capacity, required heat accumulator volume has obvious reduction to make the holistic area of RTO device less, do benefit to the practical application of device.
Drawings
FIG. 1 is a top view of a thermal mass structure according to the present invention.
FIG. 2 is a schematic view of the structure of a single basalt fiber bundle group according to the present invention.
FIG. 3 is a schematic view of the structure of a single basalt fiber bundle of the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, a basalt fiber thermal oxidizer heat accumulator comprising: the heat accumulator with a cubic structure adopts a woven device taking basalt fibers as basic units, the interior of the heat accumulator is formed by arranging elliptic cylindrical basalt fiber bundle groups, and a main flow passage is formed among the bundle groups; the single basalt fiber bundle group is formed by arranging basalt fiber bundles, and a secondary flow channel is formed between the bundles; the single basalt fiber bundle is formed by twisting the basalt fibers in a specific twisting number after the basalt fibers in micron order are tightly arranged.
The basic unit of the heat accumulator is basalt fiber with the diameter of 5-25 mu m.
Twisting the basalt fiber into a basalt fiber bundle with the diameter d of 1-10mm by the twist number of 5-200 twists.
Space S between basalt fiber bundles in direction of vertical flow channel11.2-4d, parallel flow channelSpacing S in the direction2The two-stage flow channels are arranged in the same row as 1.2-4d to form a secondary flow channel.
Arranging n (value 10-200) basalt fiber bundles to form a long shaft D1＝(n-1)×S1+ D, minor axis D2＝(n-1)×S2+ d of basalt fiber bundle group in an elliptical cylindrical shape.
The distance (0.3-8) D between basalt fiber bundle groups in the direction of vertical flow channel1Between the parallel flow passage directions (0.3-8) D2The fork rows are arranged to form the main flow channel.
Two ends of the basalt fiber bundle are fixed, and prestress is applied to the basalt fiber bundle to be tensioned into a chord structure. The basalt fiber bundle is a flexible device, and can weaken the temperature stress inside the device through larger deformation; the fluid-solid heat exchange can be strengthened by the vibration of the strings, the thickness of the thermocline is shortened, the reversing period of the heat accumulator is prolonged, and the service life of the RTO can be prolonged.
The basalt fiber bundle group is arranged in a direction perpendicular to the flowing direction of the gas, and two ends of the basalt fiber bundle group are hinged and fixed on the shell, so that the gas flows in a transverse sweeping mode.
Claims (8)
1. A basalt fiber thermal oxidizer heat accumulator, comprising: the heat accumulator with a cubic structure adopts a woven device taking basalt fibers as basic units, the interior of the heat accumulator is formed by arranging elliptic cylindrical basalt fiber bundle groups, and a main flow passage is formed among the bundle groups; the single basalt fiber bundle group is formed by arranging basalt fiber bundles, and a secondary flow channel is formed between the bundles; the single basalt fiber bundle is formed by twisting the basalt fibers in a specific twisting number after the basalt fibers in micron order are tightly arranged.
2. The basalt fiber thermal oxidizer heat accumulator of claim 1, wherein the primary unit of the heat accumulator is basalt fiber having a diameter of 5-25 μm.
3. The basalt fiber thermal oxidizer heat accumulator of claim 1, wherein the basalt fiber is twisted into a basalt fiber bundle having a diameter d of 1 to 10mm with a twist count of 5 to 200 twists.
4. The basalt fiber thermal oxidizer heat accumulator of claim 3, wherein the basalt fiber bundles are separated by a vertical flow path spacing S11.2-4d, parallel flow channel direction spacing S2The two-stage flow channels are arranged in the same row as 1.2-4d to form a secondary flow channel.
5. The basalt fiber thermal oxidizer heat accumulator of claim 4, wherein the n basalt fiber bundles are arranged to form a major axis D1＝(n-1)×S1+ D, minor axis D2＝(n-1)×S2+ d of basalt fiber bundle group in elliptic cylinder shape, wherein n takes 10-200.
6. The basalt fiber thermal oxidizer heat accumulator of claim 5, wherein the basalt fiber bundle groups are separated by a vertical flow path dimension distance (0.3-8) D1Between the parallel flow passage directions (0.3-8) D2The fork rows are arranged to form the main flow channel.
7. The basalt fiber thermal oxidizer heat accumulator of claim 1, wherein the basalt fiber bundle is fixed at both ends and tensioned into a chord structure by applying a pre-stress.
8. The basalt fiber thermal oxidizer heat accumulator of claim 1, wherein the basalt fiber bundle group is oriented perpendicular to the gas flow direction and is hingedly attached at both ends to the housing such that the gas flows in a cross-flow pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010483861.5A CN111780604B (en) | 2020-06-01 | 2020-06-01 | Basalt fiber thermal oxidizer heat accumulator |
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| CN202010483861.5A CN111780604B (en) | 2020-06-01 | 2020-06-01 | Basalt fiber thermal oxidizer heat accumulator |
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| CN111780604A CN111780604A (en) | 2020-10-16 |
| CN111780604B true CN111780604B (en) | 2021-10-29 |
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| CN113390092A (en) * | 2021-07-06 | 2021-09-14 | 东南大学 | Basalt fiber bundle thermal oxidizer |
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| EP0531255A3 (en) * | 1991-08-21 | 1993-07-14 | Oleg Knieza | Packing elements for mass- and/or heaterexchange |
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| RU2013156110A (en) * | 2013-12-18 | 2015-06-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Юго-Западный государственный университет" (ЮЗГУ) | ROTARY WATER SUPPLY SYSTEM |
| CN106122686A (en) * | 2016-08-31 | 2016-11-16 | 苏州维艾普新材料股份有限公司 | A kind of vacuum heat insulation materials and core |
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| CN109437731A (en) * | 2018-11-06 | 2019-03-08 | 江南大学 | A kind of basalt fibre TGXG concrete and preparation method thereof |
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2020
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| CN111780604A (en) | 2020-10-16 |
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