CN2622654Y - Heat reservoir for heat storage radiant tube nozzle - Google Patents
Heat reservoir for heat storage radiant tube nozzle Download PDFInfo
- Publication number
- CN2622654Y CN2622654Y CNU032317255U CN03231725U CN2622654Y CN 2622654 Y CN2622654 Y CN 2622654Y CN U032317255 U CNU032317255 U CN U032317255U CN 03231725 U CN03231725 U CN 03231725U CN 2622654 Y CN2622654 Y CN 2622654Y
- Authority
- CN
- China
- Prior art keywords
- heat storage
- radiant tube
- heat
- regenerator
- accumulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Gas Burners (AREA)
Abstract
The utility model discloses a regenerator used in a regeneration radiant tube burner formed by folded arranged multi layers of metal wire nets which is made of heat-resistant metal wires. Clearance is arranged between the multi layers of metal wire nets. The specific surface area of the regenerator is 1000m<2>/m<3>-1,300m<2>/m<3>. With the novel metal wire net regenerator and matched with proper structure, the defect that the volume of the present regenerator used in a regeneration radiant tube burner is too big to be put into a radiant tube is solved, and the problem that a traditional honeycomb regenerator is easy to be damaged can be overcome. At the same time, the surface temperature of the regeneration radiant tube burner is distributed evenly, which makes the service life of the model prolonged.
Description
Technical field
The utility model relates to a kind of heat storage that is used for the accumulation of heat radiation pipe burner tip, specifically, relates to a kind of heat storage that is used for the use novel metal net of accumulation of heat radiation pipe burner tip.
Background technology
Utilize heat storage to reclaim the sensible heat of burnt gas and be a new technology with the accumulation of heat radiant tube burner technology that it carries out the high temperature preheating of combustion air, burner configuration is at the two ends of radiant tube and make its alternate combustion, makes burnt gas and combustion air alternately be preheating to supplied burner behind the high temperature by heat storage and with combustion air.Even the radiant tube diameter is thin or size is long, also can improve heat transfer efficiency uniformly simultaneously in the radiant tube surface temperature, solved traditional radiation pipe burner tip and existed the radiant tube surface temperature distribution inhomogeneous, the problem that the life-span is short.But existing accumulation of heat radiant tube heat storage is all selected ceramic honeycomb body, because the radiant tube caliber is elongated, guarantee certain specific area, require the honeycomb ceramics wall thickness little, manufacture difficulty is big, in use, there is the problem of easy breakage again in honeycomb ceramics, and the use cost height is owing to will draw high-temperature flue gas, the insulation of pipeline etc. there is higher requirement, causes investment big.
Summary of the invention
The purpose of this utility model is, problem at above-mentioned existing accumulation of heat radiation pipe burner tip existence, adopt the woven wire material to be made into novel heat storage, by optimizing the structure of burner, realized the integrated of burner and heat storage, the woven wire heat storage is difficult for corrupted in use, can realize desirable Temperature Distribution simultaneously, improve the life-span and simplified the structure, solved the problem that original accumulation of heat radiant tube exists.
For reaching above-mentioned purpose, the technical solution of the utility model is as follows:
A kind of heat storage that is used for the accumulation of heat radiation pipe burner tip is characterized in that, is made nettedly by the heating resisting metal silk, and the multiple layer metal silk screen is folded establishes formation, leaves the gap between the multiple layer metal silk screen, and the specific area of described heat storage is 1000m
2/ m
3To 1300m
2/ m
3
Described wire diameter is 2～2.5mm.
Described mesh is 2 * 2mm.
Gap between described each layer net is 2～2.5mm.
By using new type of metal silk screen heat storage, be equipped with suitable structure, it is bulky to have solved existing accumulation of heat radiation pipe burner tip heat storage, can't put into the disadvantage of radiant tube, and overcome the problem that the legacy cellular heat storage damages easily, it is even simultaneously to have accumulation of heat radiation pipe burner tip surface temperature distribution fully, the characteristics that the life-span is long.
Description of drawings
Fig. 1 is the utility model woven wire heat storage body structure schematic diagram;
Fig. 2 uses the radiation pipe burner tip system of novel heat storage for the utility model;
Fig. 3 is the utility model heat accumulation type radiant tube point position schematic diagram.
Description of symbols among the figure
1-air blast 2-air reversing valve
3-woven wire heat storage 4-center gas pipe
5-furnace wall 6-W type radiant tube
7-air-introduced machine 8-chimney
9-coal gas reversal valve 10-burner
11-burner 12-coal gas
The specific embodiment
In order to understand structure of the present utility model, function and effect better, the following preferred embodiment of existing utilization is elaborated also in conjunction with the accompanying drawings.
Consult Fig. 1, the heating resisting metal silk is made by alloy material, and wire diameter is φ 2.5mm, and by being made into silk screen, its mesh is 2 * 2mm, and every net is selected appropriate porosity apart from being 2～2.5mm, makes specific area up to 1300m
2/ m
3(specific area=heat exchange area (m
2)/heat storage volume (m
3)), be higher than honeycomb heat accumulation body, calculate by detailed thermal technology, determine required heat storage quantity, finally, make the drag losses minimum according to the size of radiation pipe burner tip, determine the size of woven wire heat storage, and be installed to burner.Coal gas is center nozzle in burner, on woven wire the perforation and go into, igniter burner and coal gas center nozzle are arranged in parallel.Air is added by the direction vertical with coal gas, in A condition, enter radiant tube and coal gas mixed combustion after the preheating of woven wire heat storage, switch to the B state through certain hour (commutation cycle) system's reversal valve, hot flue gas becomes cold flue gas and discharges behind the wire heat storage.
Combustion air is added by blower fan 1, enter burner 11 through reversal valve 2 and after 3 preheatings of wire heat storage, enter W type radiant tube, coal gas 12 is entered the air mixing after-combustion of W type radiant tube and preheating by center gas pipe 4 behind coal gas reversal valve 9, the flue gas that burning back forms enters reversal valve 2 after by burner 10, be retracted to chimney 8 by air-introduced machine 7 again, be discharged to atmosphere then, above process is the period 1, coal gas reversal valve 9 and air reversing valve 2 enter second round after commutating simultaneously, system is by burner 10 tissue burnings, the flue gas that the burning back forms is extracted out by burner 11, through reversal valve 2, be discharged to atmosphere behind air-introduced machine 7 and the chimney 8, system is in cycle one and cycle two round switchings.
Radiation pipe burner tip system for the novel heat storage of application of Fig. 2, be provided with measuring point layout as the measuring radiation pipe burner surface temperature distribution of Fig. 3, find out by Fig. 3, W radiant tube outer surface has been arranged 16 measuring points altogether, wherein measuring point 1 and measuring point 16 be in the exit of woven wire heat storage, so the temperature of measuring point 1 ' and measuring point 16 has been represented the preheat temperature of combustion air.
Result of the test shows that the surface temperature distribution of the radiation pipe burner tip behind the novel heat storage of use is more even, and radiant tube surface mean temperature difference is 58.1 ℃, and conventional radiation pipe burner tip surface mean temperature difference is 95.5 ℃, and CO content in smoke is 35PPm only, NO
xContent 16PPm.Its exhaust gas temperature is up to 230 ℃, conventional radiation pipe burner tip, exhaust gas temperature under same working condition can be up to 700 ℃, exothermal efficiency is about 75%, and novel radiation pipe burner tip exothermal efficiency is 92.3%, illustrate that its exothermal efficiency improves greatly because the exhaust gas temperature of radiant tube reduces greatly.
The heat storage designing and calculating:
1 initial data
1) high coke mixed gas, calorific value 7356KJ/Km
3
2) combustion air flow 155Km
3/ h;
3) 30 seconds commutation cycles;
4) woven wire heat storage porosity is 40%, and every thickness is 2.5mm;
5) the radiant tube internal diameter is φ 178mm, main burner internal diameter φ 40mm;
6) specific heat ≮ 0.46KJ/Kg of heating resisting metal silk ℃;
7) specific area ≮ 1300m of heating resisting metal silk
2/ m
3
8) density of material 7.87g/cm
3
9) drag losses: when superficial linear velocity in a column is 1 ∽ 1.5m/s, Δ P=10 ∽ 100Pa/ sheet;
10) gas composition (%):
| CO | CH 4 | H 2 | CO 2 | CmHn | N 2 | H 2O |
| 16.67 | 7.09 | 18.78 | 15.62 | 0.96 | 36.70 | 4.18 |
2 burnings are calculated
L
o，o
2＝(0.5CO+0.5H
2+2CH
4+3CmHn)×10
-2＝0.3479 Nm
3/Nm
3
Get n=1.15, then L
n=1.906
∴ V
k＝81×1.906＝154.4 Nm
3/h
3 heat storage weight are calculated
If be 30 seconds commutating period, air preheat to 800 ℃, then preheated air institute calorific requirement is:
Q
k＝V
k×C
k×(800-20)＝154.4/60×0.5×1.3976×(800-20)
＝1402.6 KJ/30S
If the flue-gas temperature into and out of woven wire is 900 ℃ and 800 ℃, then required woven wire weight
G
Net=Q
k* 1.1/[C
Net(900-800)]=1402.6 * 1.1/0.46 (900-800)
＝33.54 Kg/30S
The porosity of getting woven wire is ε=40%, and then the volume of heat storage is
V
Net=G
Net/ ρ
Net(1-40%)=0.00717 m
3/ 30S
4 heat storage body structure sizes
L
Reason=V
Net/ 0.785 (D
2-d
2)=320.38 mm
If every woven wire thickness δ=2.5mm, sheet spacing ι=1.5mm then sheet count n and are:
The n=320.38/2.5=128 sheet gets actual heat storage length
L
Real=128 * 2.5+ (128-1) * 1.5=510.5 mm
5 compare with traditional heat storage
Compare as follows to new woven wire heat storage and traditional heat storage:
The physical parameter of at present common heat storage
| Sequence number | Material | Unit | |
| 1 | The porous cordierite heat storage | KJ/kg.℃ | 0.256～0.293 |
| 2 | Mullite corundum heat storage | KJ/kg.℃ | 0.293～0.33 |
| 3 | The aluminium oxide heat storage | KJ/kg.℃ | 0.293～0.33 |
| 4 | The corundum heat storage | KJ/kg.℃ | 0.293～0.348 |
The specific heat that adopts common heat storage minimum as seen from the above table is 0.256KJ/kg. ℃, and maximum specific heat is 0.348KJ/kg. ℃, takes operating mode identical when using woven wire, is calculated as follows:
G
Blue or green=Q
k* 1.1/[C
Blue or green(900-800)]=1402.6 * 1.1/0.256 (900-800)
＝60.26 Kg/30S
G
Just=Q
k* 1.1/[C
Just(900-800)]=1402.6 * 1.1/0.348 (900-800)
＝44.33 Kg/30S
By result of calculation as seen, weight increases by 79.67% and 32% respectively, this shows that the new woven wire heat storage of employing can be so that the volume of heat storage obviously reduces, simultaneously because its integrated of burner and heat storage of having realized easy to process.
Claims (4)
1, a kind of heat storage that is used for the accumulation of heat radiation pipe burner tip is characterized in that, is made nettedly by the heating resisting metal silk, and the multiple layer metal silk screen is folded establishes formation, leaves the gap between the multiple layer metal silk screen, and the specific area of described heat storage is 1000m
2/ m
3To 1300m
2/ m
3
2, the heat storage that is used for the accumulation of heat radiation pipe burner tip as claimed in claim 1 is characterized in that, described wire diameter is 2～2.5mm.
3, the heat storage that is used for the accumulation of heat radiation pipe burner tip as claimed in claim 1 is characterized in that, described mesh is 2 * 2mm.
4, the heat storage that is used for the accumulation of heat radiation pipe burner tip as claimed in claim 1 is characterized in that, the gap between described each layer net is 2～2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032317255U CN2622654Y (en) | 2003-05-29 | 2003-05-29 | Heat reservoir for heat storage radiant tube nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032317255U CN2622654Y (en) | 2003-05-29 | 2003-05-29 | Heat reservoir for heat storage radiant tube nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2622654Y true CN2622654Y (en) | 2004-06-30 |
Family
ID=34248329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032317255U Expired - Lifetime CN2622654Y (en) | 2003-05-29 | 2003-05-29 | Heat reservoir for heat storage radiant tube nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2622654Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2529285C1 (en) * | 2013-07-30 | 2014-09-27 | Открытое акционерное общество "НПО "Орион" | Combined regenerative heat exchanger |
| CN104456560A (en) * | 2014-10-22 | 2015-03-25 | 北京神雾环境能源科技集团股份有限公司 | Porous-medium radiation tube |
| CN106642126A (en) * | 2017-01-03 | 2017-05-10 | 北京神雾环境能源科技集团股份有限公司 | Intelligent reversing control system, intelligent reversing control method, intelligent radiant tube heat regeneration device and intelligent radiant tube heat regeneration method |
-
2003
- 2003-05-29 CN CNU032317255U patent/CN2622654Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2529285C1 (en) * | 2013-07-30 | 2014-09-27 | Открытое акционерное общество "НПО "Орион" | Combined regenerative heat exchanger |
| CN104456560A (en) * | 2014-10-22 | 2015-03-25 | 北京神雾环境能源科技集团股份有限公司 | Porous-medium radiation tube |
| CN104456560B (en) * | 2014-10-22 | 2017-06-27 | 北京神雾环境能源科技集团股份有限公司 | Porous media radiant tube |
| CN106642126A (en) * | 2017-01-03 | 2017-05-10 | 北京神雾环境能源科技集团股份有限公司 | Intelligent reversing control system, intelligent reversing control method, intelligent radiant tube heat regeneration device and intelligent radiant tube heat regeneration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130529 Granted publication date: 20040630 |