CN107543150A - Multi-level phase change heat accumulating type high-temperature air burning energy saver - Google Patents
Multi-level phase change heat accumulating type high-temperature air burning energy saver Download PDFInfo
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- CN107543150A CN107543150A CN201710953169.2A CN201710953169A CN107543150A CN 107543150 A CN107543150 A CN 107543150A CN 201710953169 A CN201710953169 A CN 201710953169A CN 107543150 A CN107543150 A CN 107543150A
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- heat
- heat storage
- burner
- temperature
- phase change
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
A kind of multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention, described device include：Reversal valve, heat storage, burner, fuel inlet and combustion chamber.Reversal valve connects air intlet and offgas outlet, and any switching laws between air intlet and offgas outlet；Heat storage is connected with reversal valve；Heat storage includes the first heat storage and the second heat storage, and the first heat storage is connected by reversal valve with air intlet or offgas outlet；Second heat storage is connected by reversal valve with offgas outlet or air intlet, and burner is connected with heat storage；Fuel inlet is connected with burner；Combustion chamber is connected with burner.The device can effectively utilize fume afterheat, improve the stability of burner flame.Meanwhile the heat-exchanger rig is simple in construction, easily transformation, related phase-change material can be changed according to different operating modes.
Description
Technical field
The invention belongs to combustion energy saving technical field, more particularly to a kind of multi-level phase change heat accumulating type high-temperature air burning to save
Device.
Background technology
In recent years, as national governments are to the pay attention to day by day of efforts at environmental protection, all risen in worldwide pollution administration,
The motion of environmental protection.New green technology and product continues to bring out, while is also constantly be generated new problem.Coal dust firing exists
Critical role, and the always emphasis and difficult point of pollution administration are accounted in disposal of pollutants.
Boiler thermal output how is improved, saves the energy, reduces soot emissions, is effective solution China's energy and environmental problem
Important step.And in this link, it is key point to improve efficiency of combustion.To solve the above problems, using third generation heat accumulating type
Combustion technology is undoubtedly a selection well.
Regenerative combustion technology is the combustion technology of latest generation, is third generation combustion technology.For the first generation and second
For the low situation of the burner hearth heat utilization efficiency of combustion technology, third generation heat accumulating type high temperature air combustion technology is various anti-with that can improve
The advantages of answering the heat utilization efficiency and reaction temperature, the quality and grade of reduction fuel of device, is advantageously implemented low oxygen and low nitrogen burning, together
When can reduce the generation of atmospheric haze.The burner hearth heat utilization efficiency of third generation regenerative combustion technology is up to 86%, systematic heat utilization
Rate is up to more than 94%.
The key of third generation regenerative combustion technology is the utilization of heat storage.The heat storage of existing regenerative combustion technology
It with the materials such as refractory brick, these heat-storing materials is to store heat by material sensible heat to be.Because sensible heat accumulation of heat has energy
The shortcomings that density is small, range of temperature is big so that third generation regenerative combustion technology exist reversal valve commutation frequently, burner combustion
Burn the shortcomings that unstable.
The content of the invention
In order to solve the above problems, the invention provides a kind of multi-level phase change heat accumulating type high-temperature air burning energy saver,
Described device includes：
Reversal valve, the reversal valve connect air intlet and offgas outlet respectively；
Heat storage, the heat storage are connected with the reversal valve, by caused flue gas accumulation of heat in combustion chamber, and
The gas entered through the air intlet is heated；The reversal valve is in the air intlet and the tail gas
Any switching laws between outlet, make that air intlet connects with heat storage or offgas outlet connects with heat storage；
Burner, the burner are connected with the heat storage；
Fuel inlet, the fuel inlet connect the burner；
Combustion chamber, the combustion chamber are connected with the burner.
Further, the heat storage includes the first heat storage and the second heat storage, and first heat storage passes through described
Reversal valve is connected with the air intlet or the offgas outlet；Second heat storage passes through the reversal valve and the tail gas
Outlet or air intlet connection.
Further, the burner includes the first burner and the second burner, first burner and first heat storage
Connection；Second burner is connected with second heat storage；First burner and second burner are connected to oil
Air cock.
Preferably, the heat storage is multi-level phase change heat storage.
Further, the heat storage includes multiple thermal storage units, and the thermal storage unit includes high-temperature heat accumulation unit, medium temperature
Thermal storage unit, low-temperature heat accumulating unit.
Further, the high-temperature heat accumulation unit is equipped with high temperature phase change material (pcm), and the medium temperature regenerator unit is equipped with medium temperature phase
Become material, the low-temperature heat accumulating unit is equipped with low-temperature phase-change material, the high-temperature heat accumulation unit, medium temperature regenerator unit and low temperature
Thermal storage unit is arranged in order in the heat storage according to along flow of flue gas direction, temperature sequence.
Further, both sides are provided with multiple spoilers inside the heat storage.
Further, gap is provided between the phase-change material in the thermal storage unit, the flowing for flue gas.
Further, the phase-change material in the thermal storage unit is supported by accumulation of heat support and laid.
Preferably, the connecting rod and side support that the accumulation of heat support includes horizontal positioned support plate, placed vertically,
Multiple support plates by the connecting rod vertical direction interval connect, the side support be placed in the support plate it
Between, and be connected with the connecting rod, the connecting rod and the side support form the stereoscopic grid being layered, and the support plate is set
It is placed in each layer and places phase-change material.
A kind of the advantages of multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention, is：
1. the device of the present invention is a kind of more efficient regenerative combustion system using fume afterheat.
2. using multistage latent-heat storage body in the device of the present invention, phase change heat storage material can be changed according to actual conditions,
Temperature control is more flexible, and pre-heated gas temperature is more steady.
3. the phase-change material that heat storage uses in the present invention is cheap for fuse salt solid-liquid sizing phase-change material, cost
It is low.
4. the phase-change material storage density in the multi-level phase change heat storage used in the present invention is big, heat accumulation time length, commutation
Valve need not frequently commutate.
5. the phase-change material in the present invention has the characteristics of phase transition temperature is constant, it is ensured that the temperature of preheated air compared with
Relative constancy in the long time, so that the flame of burner is more steady.
Brief description of the drawings
Fig. 1 is the schematic diagram of multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention.
Fig. 2 is the structural representation of heat storage of the present invention.
Fig. 3 is the structural representation of accumulation of heat support of the present invention.
1- air intlets, 2- reversal valves, the heat storages of 3- first, 4- oil and gas switch, the burners of 5- first, 6- combustion chambers, 7-
Two burners, the heat storages of 8- second, 9- offgas outlets, 10- high-temperature heat accumulations unit, 11- medium temperature regenerators unit, 12- low-temperature heat accumulating lists
Member, 13- flat brackets, 14- connecting rods, 15- side supports.
Embodiment
Below with reference to accompanying drawing, the multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention is carried out further
Ground describes in detail.
The structural representation of multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention according to Fig. 1, this
Invention includes air intlet 1, reversal valve 2, the first heat storage 3, oil and gas switch 4, the first burner 5, combustion chamber 6, the second burner
7th, the second heat storage 8, offgas outlet 9.The reversal valve 2 connects air intlet 1 and offgas outlet 9, and in the air intlet 1
With described 9 any switching laws of offgas outlet；The heat storage is connected with the reversal valve 2, and the heat storage includes the first accumulation of heat
The heat storage 8 of body 3 and second, first heat storage 3 pass through the reversal valve 2 and the air intlet 1 or the offgas outlet 9
Connection；Second heat storage 8 is connected by the reversal valve 2 with the offgas outlet 9 or the air intlet 1.The combustion
Burn room 6 to be connected with the burner, the burner includes the first burner 5 and the second burner 7, first burner 5 and described first
Heat storage 3 connects；Second burner 7 is connected with second heat storage 8；First burner 5 and second burner 7 divide
Oil and gas switch 4 is not connected with.
The structural representation of heat storage of the present invention according to Fig. 2, the heat storage includes multiple thermal storage units, described
Thermal storage unit includes high-temperature heat accumulation unit 10, medium temperature regenerator unit 11, low-temperature heat accumulating unit 12.Heretofore described high-temperature heat accumulation
Unit 10 is equipped with high temperature phase change material (pcm), and the medium temperature regenerator unit 11 is equipped with medium temperature phase-change material, the low-temperature heat accumulating unit 12
Equipped with low-temperature phase-change material, the high-temperature heat accumulation unit 10, medium temperature regenerator unit 11 and low-temperature heat accumulating unit 12 are in the storage
It is arranged in order from top to bottom according to along flow of flue gas direction, temperature sequence in hot body.Also, heretofore described heat storage
Internal both sides are provided with multiple spoilers.Gap is provided between the thermal storage unit, the flowing for flue gas.In the present invention
There is the phase-change material of a variety of sizings in heat storage, because traditional phase-change material is the relatively low inorganic salt materials of thermal conductivity factor, because
This, the phase-change material positioned at each row in thermal storage unit is staggered so as to improve the heat transfer effect of heat storage.And this
The spoiler set in invention is then to improve the heat transfer effect between flue gas and phase-change material.
The structural representation of accumulation of heat support of the present invention according to Fig. 3, accumulation of heat is provided with the outside of the thermal storage unit
Support.The connecting rod 14 and side support 15 that the accumulation of heat support includes horizontal positioned support plate 13, placed vertically, it is multiple
The support plate 13 is connected by the connecting rod 14 at vertical direction interval, and the side support 15 is placed in the support plate
Between 13, and it is connected with the connecting rod 14.Block sizing phase-change material in the present invention is lain on the support plate 13, is
Prevent the flue gas that volume of phase-change material is flowed from blowing, the side of phase-change material stopped by side support 15.Described support is put down
Plate 13, side support 15 and connecting rod 14 use resistant to elevated temperatures stainless steel.
It is an object of the invention to propose a kind of multi-level phase change heat accumulating type high-temperature air burning energy saver, the device can be with
Fume afterheat effectively is utilized, improves the stability of burner flame.The heat-exchanger rig is simple in construction simultaneously, easily transformation, related phase
Becoming material can be changed according to different operating modes.Because phase-change material just has, storage density is big, phase transition temperature is constant, phase variant
The advantages that product change is small so that it is big that the heat-accumulating burner solves the air temperature variations scope of gas commutation frequently, after preheating
The problem of caused burner flame combustion instability.Also, all phase-change materials are all sizing phase-change materials in the present invention, its
In solid-liquid phase transition process, shape keeps constant, the situation that will not be flowed, and corrosivity is small.
A kind of running of multi-level phase change heat accumulating type high-temperature air burning energy saver of the present invention is：Normal temperature air leads to
Cross gas feed 1 and enter 2 reversal valves, now, the reversal valve 2 is commutated by solid line in Fig. 1.Enter right side first afterwards to store
Hot body 3, now being stored in the latent heat storage material of the first heat storage 3 has heat, and gas at normal temperature after first heat storage 3 by being added
Heat enters the first burner 5.Now, the oil and gas switch 4 positioned at right side is open-minded, and the oil and gas import 4 positioned at left side is closed, fuel oil or combustion
Gas is then entered in the first burner 5 of right side by right side oil and gas switch 4, is mixed with heated gas and is burnt in combustion chamber 6.
Gas after burning is then entered in the second heat storage 8 of left side by the second burner of left side 7.Now, fume afterheat is stored in a left side
In the second heat storage of side 8.Tail gas after being cooled enters in reversal valve 2 after being come out from the second heat storage 8, through the row of offgas outlet 9
Go out.
Until in the first heat storage of right side 3 after the heat release of latent heat heat accumulating, the reversal valve 2 is then such as Fig. 1
Commutated shown in middle dotted line, now, normal temperature air is entered in reversal valve 2 by gas feed 1, is entered left side second afterwards and is stored
In hot body 8, now second heat storage 8 has stored heat, and normal temperature air then enters after second heat storage 8 is preheated
In the second burner of left side 7.Now, left side oil and gas switch 4 is open-minded, and fuel oil or combustion gas then enter left side by left side oil and gas switch 4
In second burner 7, mix with heated gas and burnt in combustion chamber 6.Gas after burning is then burnt by right side first
Mouth 5 enters in the first heat storage 3 of right side.Now, fume afterheat is stored in the first heat storage 3 of right side, the tail after being cooled
Gas enters in reversal valve 2 after being come out from the first heat storage 3, is discharged through offgas outlet 9.Reciprocation cycle uses as stated above.
According to an embodiment of the invention, by controlling the oil and gas switch 4 of the left and right sides, can control correspondingly
The working condition of heat storage.Heretofore described the first heat storage 3 and the second heat storage 8 can also be to multiple combustions
Room 6 is burnt to be preheated.
High temperature phase change material (pcm) in the present invention is the sizing solid-liquid phase-change material that phase transition temperature is 600-900 DEG C.Such as：
61Na2SO4- 39MgO, phase transition temperature are 884 DEG C；62Na2SO4-38SiO2, phase transition temperature is 858 DEG C；54LiF-46MgO, phase transformation
Temperature is 849 DEG C；24Na2CO3-26BaCO3- 50MgO, phase transition temperature are 686 DEG C；54MgCl2-48SiO2, phase transition temperature 714
℃；45NaF-15MgF-40MgO, phase transition temperature are 832 DEG C；40LiF-20MgF2- 40MgO, phase transition temperature are 746 DEG C.
Medium temperature phase-change material in the present invention is the sizing solid-liquid phase-change material of 300-600 DEG C of phase transition temperature.Such as：
53Li2SO4- 47MgO, phase transition temperature are 577 DEG C；63KOH-37SiO2, phase transition temperature is 400 DEG C；33.6Na2CO3-
26.4Li2CO3- 40MgO, phase transition temperature are 496 DEG C；33MgCl2- 12.24KCl-11.76NaCl-40MgO, phase transition temperature are
380℃；18.15NaCl-13.2KCl-23.65LiCl-45MgO, phase transition temperature are 346 DEG C；24.44BaCl2-13.2KCl-
15.95CaCl2- 48MgO, phase transition temperature are 551 DEG C；MgCl2- NaCl, phase transition temperature are 435 DEG C.
Low-temperature phase-change material in the present invention is the sizing solid-liquid phase-change material of 100-300 DEG C of phase transition temperature.Such as：
41.8KCl-19.2ZnCl2- 40MgO, phase transition temperature are 235 DEG C；29NaNO3-29KNO3- 42MgO, phase transition temperature are 220 DEG C；
40LiNO3-60 diatomite, phase transition temperature are 250 DEG C；55ZnCl-45MgO, phase transition temperature are 280 DEG C；52AlCl3- 48MgO,
Phase transition temperature is 190 DEG C.
Because sizing phase-change material makes simply, its size can be made according to actual conditions.
Hereinafter, the behaviour in service of corresponding phase-change material under different waste heat supply temperatures will be illustrated by two embodiments.
Embodiment one
1. high-temperature shaping phase-change material is 24Na used by the present embodiment2CO3-26BaCO3- 50MgO, medium temperature sizing phase
Change material is 33.6Na2CO3-26.4Li2CO3- 40MgO, low-temperature shaped phase-change material are 29NaNO3-29KNO3-42MgO.Three kinds
The size of phase-change material is 170 × 100 × 40mm, and the clearance distance between phase-change material is 10mm.
2. combustion gas (methane) and air are entered into the first burner 5 by the first heat storage 3 and burnt in combustion chamber 6.
3. the tail gas after burning enters the second heat storage 8, waste heat is stored into the phase of the second heat storage 8 with heat accumulating heat exchange
Become in material.
4. when the exhaust temperature come out from the second heat storage 8 is higher than 200 DEG C, change reversal valve 2, while open second and burn
Mouth 7；Now the phase-change material in normal temperature air and the second heat storage 8 carries out heat exchange heating, with combustion gas (methane) in combustion chamber 6
Burning；
5. the tail gas after burning enters the phase transformation material that the first heat storage 3 is stored into the first heat storage 3 with heat accumulating heat exchange
In material.
6. when the exhaust temperature come out from the first heat storage 3 is higher than 200 DEG C, change reversal valve 2.
Reciprocating operation as stated above.
Embodiment two
1. high-temperature shaping phase-change material is 45NaF-15MgF-40MgO used by the present embodiment, medium temperature sizing phase transformation material
Expect for 33MgCl2- 12.24KCl-11.76NaCl-40MgO, low-temperature shaped phase-change material are 52AlCl3-48MgO.Three kinds of phase transformations
The size of material is 170 × 100 × 40mm, and the clearance distance between phase-change material is 10mm.
2. combustion gas (methane) and air are entered into the first burner 5 by the first heat storage 3 and burnt in combustion chamber 6.
3. the tail gas after burning enters the second heat storage 8, waste heat is stored into the phase of the second heat storage 8 with heat accumulating heat exchange
Become in material.
4. when the exhaust temperature come out from the second heat storage 8 is higher than 150 DEG C, change reversal valve 2, while open second and burn
Mouth 7；Now the phase-change material in normal temperature air and the second heat storage 8 carries out heat exchange heating, with combustion gas (methane) in combustion chamber 6
Burning；
5. the tail gas after burning enters the phase transformation material that the first heat storage 3 is stored into the first heat storage 3 with heat accumulating heat exchange
In material.
6. when the exhaust temperature come out from the first heat storage 3 is higher than 150 DEG C, change reversal valve 2.
Reciprocating operation as stated above.
The embodiment one and embodiment two provided in the present invention, employs different phase-change materials and carries out heat exchange accumulation of heat, enter
And reflect for different waste heat supply temperatures, it is necessary to which applying working condition could be met using different phase-change materials.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be any
Combined in an appropriate manner in individual or multiple embodiments or example.In addition, in the case of not conflicting, the technology of this area
Different embodiments or example and the feature of different embodiments or example described in this specification can be combined by personnel
And combination.
Claims (10)
1. a kind of multi-level phase change heat storing type energy-saving device, it is characterised in that described device includes：
Reversal valve, the reversal valve connect air intlet and offgas outlet respectively,
Heat storage, the heat storage are connected with the reversal valve, by caused flue gas accumulation of heat in combustion chamber, and to through the sky
The gas that gas import enters is heated；Reversal valve any switching laws between the air intlet and the offgas outlet, make
Air intlet connects with heat storage or offgas outlet connects with heat storage；
Burner, the burner are connected with the heat storage；
Fuel inlet, the fuel inlet connect the burner；
Combustion chamber, the combustion chamber are connected with the burner.
2. multi-level phase change heat storing type energy-saving device according to claim 1, it is characterised in that the heat storage includes first
Heat storage and the second heat storage,
First heat storage is connected by the reversal valve with the air intlet or the offgas outlet；
Second heat storage is connected by the reversal valve with the offgas outlet or the air intlet.
3. multi-level phase change heat storing type energy-saving device according to claim 1 or 2, it is characterised in that the burner includes the
One burner and the second burner,
First burner is connected with first heat storage；
Second burner is connected with second heat storage；
First burner and second burner are connected to oil and gas switch.
4. multi-level phase change heat storing type energy-saving device according to claim 1 or 2, it is characterised in that the heat storage is more
Level phase-transition heat-storage body.
5. multi-level phase change heat storing type energy-saving device according to claim 4, it is characterised in that the heat storage includes multiple
Thermal storage unit,
The thermal storage unit includes high-temperature heat accumulation unit, medium temperature regenerator unit, low-temperature heat accumulating unit.
6. multi-level phase change heat storing type energy-saving device according to claim 5, it is characterised in that
The high-temperature heat accumulation unit is equipped with high temperature phase change material (pcm),
The medium temperature regenerator unit is equipped with medium temperature phase-change material,
The low-temperature heat accumulating unit is equipped with low-temperature phase-change material,
The high-temperature heat accumulation unit, medium temperature regenerator unit and low-temperature heat accumulating unit are in the heat storage according to along flow of flue gas
Direction, temperature sequence are arranged in order.
7. multi-level phase change heat storing type energy-saving device according to claim 5, it is characterised in that both sides inside the heat storage
Multiple spoilers are installed.
8. multi-level phase change heat storing type energy-saving device according to claim 5, it is characterised in that the phase in the thermal storage unit
Become storeroom and be provided with gap, the flowing for flue gas.
9. multi-level phase change heat storing type energy-saving device according to claim 5, it is characterised in that the phase in the thermal storage unit
Become material and placement is supported by accumulation of heat support.
10. multi-level phase change heat storing type energy-saving device according to claim 9, it is characterised in that the accumulation of heat support includes
Horizontal positioned support plate, the connecting rod and side support placed vertically,
Multiple support plates are connected by the connecting rod at vertical direction interval,
The side support is placed between the support plate, and is connected with the connecting rod,
The connecting rod and the side support form the stereoscopic grid of layering, and the support plate is arranged at each layer and places phase
Become material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710953169.2A CN107543150A (en) | 2017-10-13 | 2017-10-13 | Multi-level phase change heat accumulating type high-temperature air burning energy saver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710953169.2A CN107543150A (en) | 2017-10-13 | 2017-10-13 | Multi-level phase change heat accumulating type high-temperature air burning energy saver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107543150A true CN107543150A (en) | 2018-01-05 |
Family
ID=60967825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710953169.2A Pending CN107543150A (en) | 2017-10-13 | 2017-10-13 | Multi-level phase change heat accumulating type high-temperature air burning energy saver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107543150A (en) |
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2017
- 2017-10-13 CN CN201710953169.2A patent/CN107543150A/en active Pending
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