CN106318326A - Furnace slag and paraffin type composite phase change heat storage material - Google Patents
Furnace slag and paraffin type composite phase change heat storage material Download PDFInfo
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- CN106318326A CN106318326A CN201510342477.2A CN201510342477A CN106318326A CN 106318326 A CN106318326 A CN 106318326A CN 201510342477 A CN201510342477 A CN 201510342477A CN 106318326 A CN106318326 A CN 106318326A
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- Prior art keywords
- heat
- slag
- paraffin
- phase change
- storing material
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
A furnace slag and paraffin type composite phase change heat storage material is characterized in that the material comprises a uniform molten dry furnace slag powder and paraffin mixture, and is prepared through transferring the mixture into a vacuum reaction kettle and carrying out vacuum pumping treatment. The material can be widely applied to the fields of recycling of industrial waste heat, solar energy and resident building heating. The phase change time of the material is 45 min ahead of the phase change of paraffin, the phase change latent heat of the material can reach 172.6 J/g, and the phase change temperature is about 52 DEG C; and waste furnace slag is adopted as a paraffin supporting material, so the waste furnace slag is recycled, the furnace slag utilization rate is improved, energy saving and environmental protection effects are reached, the heat conduction coefficient of paraffin is improved (by 28%), the energy level of the heat storage material is increased, and the production cost of the heat storage material is reduced to 2.5 yuan/kg.
Description
Technical field
The present invention relates to heat-storing material field, particularly to a kind of composite phase change heat-accumulation material.
Background technology
At present, increasingly reduce at nonrenewable resources, under severe situation that problem of environmental pollution becomes increasingly conspicuous,
Require technical staff's research and development to the new forms of energy of high-efficiency cleaning, and the cycling and reutilization to the industrial waste energy
The innovation of technology seems the most urgent.And the heat storage technology arisen at the historic moment, then become main research in recent years clear
One of important technical of the utilization of clean high efficiency of energy, resources conservation and environmental conservation.
Paraffin is the most stable a kind of heat conduction phase change heat storage material, its nontoxic, non-corrosiveness, more without supercool and
Chromatography phenomenon；But it but exists that heat conductivity is little, rate of heat transfer is low and the defect such as amount of stored heat is low.Existing skill
Art mainly by the method for single infiltration, adds the metal of various form, graphite or rib in paraffin
Sheets etc. are as backing material and then overcome drawbacks described above.But, make with metal material, fin or graphite etc.
The technique preparing composite phase change heat-accumulation material for backing material is considerably complicated, relatively costly, and some are rare
Expensive metal, is just difficult to again recycle once after adding heat-storing material, thus exacerbates the wasting of resources
And environmental pollution.
Slag is the block waste residue produced after coal burns in boiler, the work that its current discharge capacity of Ye Shi China is bigger
One of industry waste residue.Rich in Multimetal oxide in slag, such as SiO2、Al2O3、FeO、Fe2O3、CaO、
TiO2Deng, if arbitrarily stacking, abandoning, not only can cause environmental pollution, and also result in the waste of resource.
At present, slag mainly as baking bricks, building block and the making material of cement, its utilization rate is extremely low.
Summary of the invention
The cost that the invention aims to solve existing composite phase change heat-accumulation material is high, and the utilization of resources
The technical problem such as unreasonable, and then provide one and can solve above-mentioned technical problem, again can be with industrial slags
Slag, paraffin wax type composite phase change heat-accumulation material as backing material.
The present invention solves technical problem and the technical scheme is that
Slag, paraffin wax type composite phase change heat-accumulation material, including the drying oven ground-slag of the molten condition of mix homogeneously
With the mixture of paraffin, then prepare after carrying out evacuation process in said mixture is transferred to vacuum response still.
By implementing technique scheme, industrial slags is merged with paraffin with the form of drying oven ground-slag,
Just it is avoided that both occur the phenomenon of chromatography upon mixing, carries out evacuation process and then can improve both melt
Closing performance, final is to prepare accumulation of heat good, the stable present invention to have established technical foundation.Next, this
Bright transformation time can shift to an earlier date 45min than the transformation time of paraffin, and latent heat of phase change can reach
172.6J/g, phase transition temperature is at about 52 DEG C.Meanwhile, using Waste Slag as the backing material of paraffin, no
But Waste Slag recycling can be made, metal-oxide contained in reasonably make use of slag, improves
The utilization rate of slag, serves the effect of energy-conserving and environment-protective, but also the heat conductivity that improve paraffin (carries
High by 28%), add the energy dynamics of heat-storing material, decrease the production cost of heat-storing material, its cost
It is only 2.5 yuan/kg.And in vacuum response still, carry out the method for evacuation process and existing single infiltration side
Method is compared, and slag more can be made perfectly to disperse to be fixed in paraffin, enhance the amalgamation of slag and paraffin
Energy.
As optimal mixed proportion, in the technical program, drying oven ground-slag is 3:1 with the mass ratio of paraffin.
One as drying oven ground-slag is preferred, and in the technical program, drying oven ground-slag is first to be led to by industrial slags
Cross after circulation slag crusher carries out pulverizing and cross 20～25 mesh sieves, then carry out dry grinding and crossing 400 by grinder
After mesh sieve, then prepare after continuous heating in muffle furnace.More particularly, by grinder carry out dry grinding 1～
After 1.5 hours, after 400 mesh sieves.Temperature in muffle furnace can also be maintained at 180～200 DEG C of scopes
In, and continuous heating 8～10 hours.The impurity such as moisture contained in drying oven ground-slag now are minimum, real
Show the purpose of purification, further increase the fusion performance of pulverized slag and paraffin.
One as olefin material is preferred, and in the technical program, melting point of paraffin wax is 55～65 DEG C.This fusing point
Interior olefin material can effectively discharge substantial amounts of latent heat, is suitable for the thermal storage equipment of civilian demand.
One as drying oven ground-slag and mineral wax mixture is preferred, and in the technical program, mixture is by mixing
After drying oven ground-slag and heating paraffin to molten condition, first it is carried out mechanical agitation, then carries out ultrasound wave
Prepare after stirring.More particularly mechanical agitation 30～50min.After can also is that mechanical agitation, by molten
The temperature of state mixture is held in more than 75 DEG C, then carries out ultrasonic stirring 25～40min.Now mixture
Mixing abundant, uniform, it is possible to promote pulverized slag preferably to disperse to be fixed on melted evacuation processing stage
In the paraffin of state, lay a good foundation for the fusion both promoting.
Preferred as vacuum treated one, in the technical program the temperature in vacuum response still control 75～
80 DEG C, pressure controls 2～10pa, and carries out evacuation 60～90min.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further details.
Existing composite phase change heat-accumulation material has multiple, generally there is complicated process of preparation, high in cost of production technology
Problem.As, ceramic-like composite phase change heat-accumulation material, its thermal capacitance is 0.836J/g/K, but does not have latent
Heat；And metal class composite phase change heat-accumulation material, its latent heat typically 50～200J/g, but relatively costly,
Generally 10～80 yuan/kg；PVC class composite phase change heat-accumulation material, its latent heat is relatively low, about 50/g, becomes
This is higher, about 20 yuan/kg.
Industrial slags is mainly blended in molten with the form of drying oven ground-slag by the technology design of the present invention uniformly
Melt in the paraffin of state, and the mixture of the molten condition of both mix homogeneously is transferred in vacuum response still
Carry out evacuation process, and then make slag preferably disperse to be fixed in paraffin, thus improve slag and stone
The fusion performance of wax, finally prepares low cost, the composite phase change heat-accumulation material that heat storage performance is good, stable.
Below by way of two preparation embodiments, illustrate the present invention:
Embodiment 1
Industrial slags is pulverized by circulation slag crusher, after crossing the prepared broken slag of 20 mesh sieves simultaneously
Go successively to grinder carry out dry grinding 1 hour and cross 400 mesh sieves and prepare pulverized slag.Again pulverized slag is transferred to
It is purified in muffle furnace, it is desirable to the internal temperature of muffle furnace is 180 DEG C of also continuous heating 8 hours, heats it
After by drying oven ground-slag holding chamber temperature environmental drying preserve.
Secondly, weigh drying oven ground-slag that mass ratio is 3:1 and the paraffin that fusing point is 55 DEG C is stand-by.When by stone
When wax is heated to complete melting state, places into drying oven ground-slag and proceed to be heated to molten condition, now
Carry out mechanical agitation 30min, afterwards the temperature of molten condition mixture is maintained at 75 DEG C, then carries out 25min
Ultrasonic stirring, at this moment both are the most by evenly mixing.
Finally, the mixture of mix homogeneously is transferred in vacuum response still carry out evacuation process, will simultaneously
Temperature in vacuum response still controls at 75 DEG C, and pressure controls at 2pa, and carries out evacuation 60min and prepare
Complete.The most just can inject preparing complete composite phase change heat-accumulation material in corresponding container molding.
Embodiment 2
Industrial slags is pulverized by circulation slag crusher, after crossing the prepared broken slag of 25 mesh sieves simultaneously
Go successively to grinder carry out dry grinding 1.5 hours and cross 400 mesh sieves and prepare pulverized slag.Again pulverized slag is shifted
It is purified to muffle furnace, it is desirable to the internal temperature of muffle furnace is 200 DEG C of also continuous heating 10 hours, adds
After heat, drying oven ground-slag holding chamber temperature environmental drying is preserved.
Secondly, weigh drying oven ground-slag that mass ratio is 3:1 and the paraffin that fusing point is 65 DEG C is stand-by.When by stone
When wax is heated to complete melting state, places into drying oven ground-slag and proceed to be heated to molten condition, now
Carry out mechanical agitation 50min, afterwards the temperature of molten condition mixture is maintained at 100 DEG C, then carries out 40min
Ultrasonic stirring, at this moment both are the most by evenly mixing.
Finally, the mixture of mix homogeneously is transferred in vacuum response still carry out evacuation process, will simultaneously
Temperature in vacuum response still controls at 80 DEG C, and pressure controls at 10pa, and carries out evacuation 90min and prepare
Complete.The most just can inject preparing complete composite phase change heat-accumulation material in corresponding container molding.
The present invention prepared by an any of the above described detailed description of the invention, its transformation time is than the phase transformation of paraffin
Time can shift to an earlier date 45min, and latent heat of phase change can reach 172.6J/g, and phase transition temperature is at about 52 DEG C.Its
Secondary, the present invention, using Waste Slag as the backing material of paraffin, not only can make Waste Slag recycling,
Improve the utilization rate of slag, serve the effect of energy-conserving and environment-protective, but also improve the heat conductivity of paraffin
(improve 28%), adds the energy dynamics of heat-storing material, decreases the production cost of heat-storing material, its
Cost is only 2.5 yuan/kg.
Claims (10)
1. slag, paraffin wax type composite phase change heat-accumulation material, it is characterised in that: include the molten of mix homogeneously
The drying oven ground-slag of state and the mixture of paraffin, then take out in said mixture is transferred to vacuum response still
Prepare after application of vacuum.
2. heat-storing material as claimed in claim 1, it is characterised in that: drying oven ground-slag and the quality of paraffin
Ratio is 3:1.
3. heat-storing material as described in claim 1 or 2, it is characterised in that: drying oven ground-slag is by work
After industry slag first passes through circulation slag crusher carries out pulverizing and cross 20～25 mesh sieves, then carried out by grinder
After dry grinding and crossing 400 mesh sieves, then prepare after continuous heating in muffle furnace.
4. heat-storing material as claimed in claim 3, it is characterised in that: by grinder carry out dry grinding 1～
After 1.5 hours, after 400 mesh sieves.
5. heat-storing material as claimed in claim 3, it is characterised in that: the temperature in muffle furnace is maintained at
In the range of 180～200 DEG C, and continuous heating 8～10 hours.
6. as described in claim 1 or 2 heat-storing material, it is characterised in that: melting point of paraffin wax be 55～
65℃。
7. as described in claim 1 or 2 heat-storing material, it is characterised in that: mixture be by mixing after
Drying oven ground-slag and heating paraffin to molten condition, first it is carried out mechanical agitation, then carries out ultrasound wave and stir
Prepare after mixing.
8. heat-storing material as claimed in claim 7, it is characterised in that: mechanical agitation 30～50min.
9. heat-storing material as claimed in claim 7, it is characterised in that: after mechanical agitation, by molten condition
The temperature of mixture is held in more than 75 DEG C, then carries out ultrasonic stirring 25～40min.
10. heat-storing material as described in claim 1 or 2, it is characterised in that: the temperature in vacuum response still
Degree controls at 75～80 DEG C, and pressure controls 2～10pa, and carries out evacuation 60～90min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342477.2A CN106318326A (en) | 2015-06-18 | 2015-06-18 | Furnace slag and paraffin type composite phase change heat storage material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342477.2A CN106318326A (en) | 2015-06-18 | 2015-06-18 | Furnace slag and paraffin type composite phase change heat storage material |
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| CN106318326A true CN106318326A (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510342477.2A Pending CN106318326A (en) | 2015-06-18 | 2015-06-18 | Furnace slag and paraffin type composite phase change heat storage material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011868A (en) * | 2017-03-08 | 2017-08-04 | 北京交通大学 | A kind of paraffin/iron tailings Ceramic Composite phase-changing energy storage material and its melting impregnation preparation method |
| CN107099275A (en) * | 2017-04-28 | 2017-08-29 | 中南大学 | A kind of preparation method of blast furnace slag base composite phase-change heat accumulating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104550A (en) * | 2006-07-14 | 2008-01-16 | 宁波荣山新型材料有限公司 | Building wall phase change energy-storage type polymer thermal insulating mortar and preparation method thereof |
| CN101928551A (en) * | 2010-07-15 | 2010-12-29 | 盐城师范学院 | Higher alcohols co-blending composite phase change energy storage material and preparation method thereof |
-
2015
- 2015-06-18 CN CN201510342477.2A patent/CN106318326A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104550A (en) * | 2006-07-14 | 2008-01-16 | 宁波荣山新型材料有限公司 | Building wall phase change energy-storage type polymer thermal insulating mortar and preparation method thereof |
| CN101928551A (en) * | 2010-07-15 | 2010-12-29 | 盐城师范学院 | Higher alcohols co-blending composite phase change energy storage material and preparation method thereof |
Non-Patent Citations (1)
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| 丁玉玺等编著: "《水力贮灰场灰坝渗流与稳定》", 28 February 2013, 中国电力出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011868A (en) * | 2017-03-08 | 2017-08-04 | 北京交通大学 | A kind of paraffin/iron tailings Ceramic Composite phase-changing energy storage material and its melting impregnation preparation method |
| CN107011868B (en) * | 2017-03-08 | 2020-08-14 | 北京交通大学 | Melting infiltration preparation method of paraffin/iron tailing ceramic composite phase change energy storage material |
| CN107099275A (en) * | 2017-04-28 | 2017-08-29 | 中南大学 | A kind of preparation method of blast furnace slag base composite phase-change heat accumulating |
| CN107099275B (en) * | 2017-04-28 | 2019-10-15 | 中南大学 | A kind of preparation method of blast furnace slag base composite phase-change heat accumulating |
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Application publication date: 20170111 |