CN103574632A - Baffle board radiant tube burner heat exchanger and heat exchange method - Google Patents
Baffle board radiant tube burner heat exchanger and heat exchange method Download PDFInfo
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- CN103574632A CN103574632A CN201310590185.1A CN201310590185A CN103574632A CN 103574632 A CN103574632 A CN 103574632A CN 201310590185 A CN201310590185 A CN 201310590185A CN 103574632 A CN103574632 A CN 103574632A
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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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Abstract
The invention relates to a baffle board radiant tube burner heat exchanger and a heat exchange method. A plurality of fin baffle boards are arranged on the periphery of a finned tube and are axially distributed on the finned tube at intervals in an up-down staggered mode, and each fin baffle board is half-moon-shaped and can be arranged in a tube diameter of a radiant tube so that the finned tube, the fin baffle boards and the inner wall of the radiant tube form primary baffling flue gas channels surrounding each other up and down in a staggered mode; the outer side of the finned tube is provided with an outer fin, and the height of the fin baffle boards is higher than that of the outer fin. The flue gas channels are lengthened greatly through the fin baffle boards and flue gas baffle boards, flue gas is baffled twice in the heat exchange process, and the flue gas heat exchange distance is lengthened; the flue gas circulation face is enlarged due to the internal and external staggered cross-shaped structure of fins on the finned tube; flue gas heat transmission is uniform by means of bar-shaped fins on the inner side of a double-fin type ball head and bar-shaped fins on the outer side of the double-fin type ball head. Heat exchange efficiency is high, and service life of the double-fin type ball head and the whole heat exchanger is effectively prolonged.
Description
Technical field
The present invention relates to technical field of heat exchange devices, relate in particular to a kind of and radiation pipe burner tip matching used baffle plate type radiation pipe burner tip heat exchanger and heat-exchange method.
Background technology
In recent years, along with the lifting to product quality and performance requirement, radiant tube heating technique at home metal heat treatmet field had obtained promotion and application more and more widely.The domestic research for radiant tube heating technique is also more and more deep, for the requirement of radiation pipe burner tip waste heat recovery, pollutant emission, heating quality and burning control accuracy, improves constantly.On radiation pipe burner tip flue gas waste heat recovery, completed the transition to more efficient heat exchange modes such as fin type heat exchange and injection heat transfers by original pipe type heat transfer, radiation pipe burner tip also develops into even triple-travel heat exchange of two-pass by original one-stroke heat exchange, air preheating temperature, flue gas waste heat recovery rate further improves.
Radiation pipe burner tip heat exchanger is in structural design, conventionally adopt following design form and heat-exchange method: (1) air side heat exchange adopts fin tube type or injection heat transfer pattern more, by adding finned tube or be used for increasing heat transfer effect by air high speed jet in heat exchanger air duct inner side, generally, under the flue-gas temperature of 1000 ℃, finned heat exchanger can be by air preheat to 400 ℃, and jet structure heat exchanger can be by air preheat to 500 ℃.(2) on heat exchanger stroke, by original one-stroke heat exchange to even triple-travel heat exchange transition of two-pass.By original radiant tube intraductal heat exchange, to increasing radiant tube heat transfer outside a tube, developed.The air preheating temperature of two-pass heat exchange can reach 600 ℃, and the thermal efficiency is higher.(3) in fume side heat exchange design, one-stroke is more to select finned tube or the heat exchange of pitted skin pattern, and two-pass is more selected the form of fin tube type heat exchange and light pipe heat exchange combination, and flue gas is direct current in radiant tube and heat exchanger.
Existing radiation pipe burner tip heat exchanger is in structural design, fume side is direct current channel heat exchange, being flue gas directly flows out along radiant tube and heat exchanger inwall or heat exchanger inner gas passage, and all adopt comparatively simple tubular type, pitted skin or finned design to carry out heat exchange, fume side heat exchange still has larger room for promotion, can further improve air preheating temperature by increasing flue gas heat exchange effect completely, reduce exhaust gas temperature, improve temperature efficiency and the thermal efficiency of radiant tube heat exchanger.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of baffle plate type radiation pipe burner tip heat exchanger is provided, and this heat exchanger carries out baffling to flue gas, has significantly increased the current journey of smoke gas flow, improves air preheating temperature, reduces exhaust gas temperature, effectively raises heat transfer effect.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of baffle plate type radiation pipe burner tip heat exchanger, comprise two parts of built-in heat exchange portion and external heat exchange portion, built-in heat exchange portion mainly comprises the dipteron chip bulb of finned tube, finned tube end, the left end of finned tube connects intermediate conductor, in finned tube, be provided with hot air duct, the left end of hot air duct is fixedly connected with air-spray pipe, and the jet end of air-spray pipe passes from middle catheter wall; The right-hand member of intermediate conductor and external heat-exchanging pipe are fixed; External heat exchange portion mainly comprises smoke tube, inner external heat-exchanging pipe, the external heat-exchanging pipe inside center arranging of the smoke tube external air conduit that suspends, and smoke tube termination connects special-shaped flange; The left end of smoke tube is smoke outlet tube fixedly, right-hand member fixed air blast pipe, and air blast pipe penetrates from smoke tube, external heat-exchanging pipe, external air conduit from outside to inside successively, and fixing respectively with smoke tube, external heat-exchanging pipe, external air conduit; It is characterized in that: outer the placing at finned tube is provided with a plurality of fin deflection plates, a plurality of fin deflection plates are lower staggered being distributed on finned tube vertically, each fin deflection plate is semilune and the caliber that can be placed in radiant tube, make finned tube, fin deflection plate and radiant tube inwall form upper and lower alternative ring around a baffling exhaust gases passes; Finned tube arranged outside has outside fin, and fin deflection plate height protrudes from outside fin.
By technique scheme, on external heat-exchanging pipe, be provided with a plurality of flue gas deflection plates, a plurality of flue gas deflection plates are staggered being distributed on external heat-exchanging pipe vertically up and down, each flue gas deflection plate is semilune and the caliber that can be placed in smoke tube, make external heat-exchanging pipe, flue gas deflection plate and smoke tube inwall form upper and lower alternative ring around secondary baffling exhaust gases passes.
By technique scheme, flue gas deflection plate and fin deflection plate be equi-spaced apart distribution separately vertically all, and is 4-8.
By technique scheme, finned tube inner side also arranges inner side fin, and inner side fin and outside fin are the staggered pattern of cross and arrange; Inner side fin is unilateral to be axially in line and to arrange many rows along finned tube, and different rows' inner side fins circumferentially encircle in corresponding formation mutually at each; Outside fin unilateral vertical with finned tube axis is also arranged to a plurality of outer shrouds along finned tube external circumferential.
By technique scheme, the outside fin of finned tube is at 14-18 fin of each outer shroud distribution, and inner side fin encircles a distribution 36-54 fin in each.
By technique scheme, dipteron chip bulb is dome-type structure, is distinguished many inner side strip fins of radial arrangement and many outside strip fins along sphere bus by top to bottom.
By technique scheme, inner side strip fin and outside strip fin are respectively distributed with 8-10 bar.
By technique scheme, dipteron chip bulb, finned tube adopt heat resisting steel hot investment casting moulding.
Adopt the heat-exchange method of above-mentioned baffle plate type radiation pipe burner tip heat exchanger, baffle plate type radiation pipe burner tip heat exchanger is connected with radiation pipe burner tip; Air-spray pipe is placed in the combustion air duct inlet of radiant tube, and main burner is connected with radiant tube igniting side; Finned tube and radiant tube inwall form exhaust gases passes, and main burner and radiant tube inwall form combustion air and entrainment flue gas hybrid channel;
It is characterized in that: exhaust gases passes is significantly lengthened by fin deflection plate and flue gas deflection plate, in heat transfer process, flue gas is carried out to baffling twice, lengthen flue gas heat exchange distance; And by fin deflection plate and flue gas deflection plate, flue gas flow direction is controlled;
Utilize the inside and outside staggered decussate texture of fin on finned tube that flue gas circulating face is increased; Utilize the inside and outside side strip fin of dipteron chip bulb that flue gas is conducted heat evenly.
In said method, specifically comprise the steps:
The flue gas that main burner combustion produces is passed to heat exchanger import along radiant tube tube side, along dipteron chip bulb and finned tube, enters heat exchanger, by the iris action of fin deflection plate, forms a baffling flue gas carry out heat exchange along fin deflection plate; Flue gas enters intermediate conductor after dipteron chip bulb and finned tube heat exchange, and wherein part of smoke is entrainmented and entered hybrid channel and send into main burner combustion by the high velocity jet effect of preheated air; Another part flue gas enters external heat exchange portion, by being arranged on flue gas deflection plate on external heat-exchanging pipe, continuing to be staggered to form up and down secondary baffling flue gas and carries out heat exchange, discharges after completing two-pass heat exchange from smoke outlet tube;
Inner side air, turns back and flows to air-spray pipe along the hot air duct in finned tube along intermediate conductor ejection after the inner side fin of finned tube and the inner side strip fin and outside flue gas heat exchange of dipteron chip bulb;
Air enters from air blast pipe, by external air conduit, enter external heat exchange portion, after completing heat exchange by external heat-exchanging pipe and secondary baffling flue gas, by intermediate conductor, enter finned tube, along the Clearance Flow between fin inside finned tube and hot air duct and an outside baffling flue gas, carry out after heat exchange, pass through again the inner side strip fin heat exchange of dipteron chip bulb, return afterwards and enter hot air duct and flow into air-spray pipe and complete inner heat transfer process;
The hot-air that flows into air-spray pipe sprays at a high speed by flow jeting port, utilize to spray after the negative pressure forming is entrainmented backflow to flue gas to enter radiant tube combustion air conduit, and the air duct by combustion air conduit and main burner burns after completing mixing; The flue gas that produces of burning after covering whole radiant tube tube side successively by dipteron chip bulb, finned tube, intermediate conductor, external heat-exchanging pipe, from smoke outlet tube, discharge again after completing the two-pass heat exchange with air.
With respect to prior art, beneficial effect of the present invention is:
1, baffle plate type heat exchanger structure design, carries out baffling by flue gas in radiation pipe burner tip heat exchanger, has significantly increased the current journey of smoke gas flow, has improved heat transfer effect, effectively reduces exhaust gas temperature;
2, the inside and outside staggered decussate texture design of the fin on finned tube, inner side is along air duct direct motion layout, and outside, along flue gas baffling direction direct motion layout, has effectively increased heat transfer area and heat transfer coefficient, and air preheating temperature has improved nearly 80 ℃;
3, dipteron chip ball head structure design, has effectively increased outside heat-transfer effect in bulb, has reduced the destruction of high-temperature flue gas entry to bulb, has effectively extended the service life of dipteron chip bulb and heat exchanger integral body.
Accompanying drawing explanation
Fig. 1 is radiation pipe burner tip heat exchanger structure schematic diagram of the invention process.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the partial structurtes schematic diagram while being used in conjunction with the finned tube of fin deflection plate and radiant tube.
Fig. 4 is radiation pipe burner tip heat exchanger of the present invention and main burner and the radiant tube structural representation while supporting the use.
In figure: 1-dipteron chip bulb, strip fin outside 1.1-, strip fin inside 1.2-, 2-finned tube, fin inside 2.1-, fin outside 2.2-, 2.3-fin deflection plate, 3-hot air duct, 4-air-spray pipe, 5-intermediate conductor, 6-abnormity flange, 7-external heat-exchanging pipe, 8-flue gas deflection plate, 9-smoke tube, the external air conduit of 10-, 11-smoke outlet tube, 12-air blast pipe, 13-radiant tube, the main burner of 14-.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of baffle plate type radiation pipe burner tip heat exchanger.This heat exchanger comprises two parts of built-in heat exchange portion and external heat exchange portion, and wherein built-in heat exchange portion comprises finned tube 2, plays the dipteron chip bulb 1 of end part plug effect, the finned tube 2 being welded and fixed with dipteron chip bulb 1 continuous sealing.The two ends, left and right of finned tube 2 are connected with end part plug 1 with intermediate conductor 5 respectively, are provided with hot air duct 3 in finned tube 2.
As shown in figs. 1 and 3, dipteron chip bulb 1 is dome-type structure, adopts heat resisting steel hot investment casting moulding; Along sphere generatrix direction by top to bottom respectively strip fin 1.2 and outside strip fin 1.1 inside radial arrangement, inner side strip fin 1.2 and outside strip fin 1.1 are respectively distributed with 8-10 bar.
As Fig. 1-3, finned tube 2 is heat resisting steel hot investment casting moulding, and the interior outside of finned tube 2 is provided with fin, and inner side fin 2.1 is the staggered pattern of cross with outside fin 2.2 and arranges; Inner side fin 2.1 is unilateral to be axially in line and to arrange many rows along finned tube 2, and different rows' inner side fins 2.1, at each circumferential ring in corresponding formation mutually, encircle 36-54 fin of distribution in each; Outside fin 2.2 is unilateral vertical with finned tube 2 axis and along finned tube 2 external circumferential, be arranged to a plurality of outer shrouds, 14-18 fin of each outer shroud distribution.
Outer the placing of described finned tube 2 is provided with a plurality of fin deflection plates 2.3, and as shown in Figure 2, a plurality of fin deflection plates 2.3 are staggered being distributed on finned tube 2 up and down, and flue gas flow direction is carried out to baffling; Fin deflection plate 2.3 is arranged in the gap of outside fin 2.2; Each fin deflection plate 2.3 is semilune or semi-circular and the caliber that can be placed in radiant tube, for stainless steel laser excision forming, as shown in Figure 3, fin deflection plate 2.3 is 5 (also can need to convert setting to fin deflection plate 2.3 numbers according to baffling length, as 4-8), 5 fin deflection plates 2.3 up and down staggered equi-spaced apart are distributed on finned tube 2, and fin deflection plate 2.3 is arranged in the gap of outside fin 2.2 and protrudes from outside fin 2.2.
Machine-shaping after described hot air duct 3 employing hot investment castings, it is suitable by the reasonable control of spout precision is guaranteed to spray flow velocity, the left end of hot air duct 3 is welded and fixed and connects air-spray pipe 4, and the jet end of air-spray pipe 4 passes from intermediate conductor 5 walls.The two ends, left and right of described intermediate conductor 5 are welded and fixed with external heat-exchanging pipe 7 and finned tube 2 respectively.
Described external heat exchange portion comprises the external air conduit 10 that smoke tube 9, the inner external heat-exchanging pipe 7 arranging of smoke tube 9 and external heat-exchanging pipe 7 inside center suspend, the special-shaped flange 6 of smoke tube 9 terminations.
Abnormity flange 6 is stainless-steel sheet machine-shaping, is provided with radiant tube installing hole, heat exchanger gripper shoe on special-shaped flange 6, and special-shaped flange 6 is fixed with smoke tube 9 continuous weldings.Described smoke tube 9 adopts seamless steel pipe machine-shaping, has exhanst gas outlet pore, air air intake pore, and smoke outlet tube 11 continuous weldings are fixed on exhanst gas outlet pore place; Air blast pipe 12 penetrates from the reserved air air intake pore of smoke tube 9, and is welded and fixed with smoke tube 9, external heat-exchanging pipe 7 and external air conduit 10 respectively from outside to inside.
Described external heat-exchanging pipe 7 is stainless-steel seamless pipe machine-shaping, near smoke outlet tube 11 ends, is provided with plug, and the other end is also that right-hand member is connected with intermediate conductor 5; External air conduit 10 is positioned at the center of external heat-exchanging pipe 7 inside, and right-hand member and air intlet pipe 12 are welded and fixed.On described external heat-exchanging pipe 7, be provided with a plurality of flue gas deflection plates 8, a plurality of flue gas deflection plates 8 are staggered is up and down distributed in (principle and structure are with fin deflection plate 2.3) on external heat-exchanging pipe 7, and flue gas flow direction is carried out to baffling; Flue gas deflection plate 8 is stainless steel laser excision forming, for semilune or semi-circular structure and can be placed in the caliber of smoke tube 9; As shown in Figure 1, flue gas deflection plate 8 is 5, and 5 flue gas deflection plates 8 up and down staggered equi-spaced apart are distributed on external heat-exchanging pipe 7, also can need to converts setting to flue gas deflection plate 8 numbers according to baffling length, as individual in 4-8.
As shown in Figure 3 and Figure 4, when radiation pipe burner tip heat exchanger of the present invention supports the use with main burner 14 and radiant tube 13: special-shaped flange 6 is connected with radiant tube 13 heat exchanger sides, air-spray pipe 4 is placed in the combustion air duct inlet of radiant tube 13, and main burner 14 is connected with radiant tube 13 igniting sides by bolt.Finned tube 2 forms exhaust gases passes with radiant tube 13 inwalls, by finned tube 2 fin deflection plate 2.3 above and radiant tube 13 inwalls form upper and lower alternative ring around an approximate spiral baffling exhaust gases passes, by 2.3 pairs of flue gas flow directions of fin deflection plate of setting on finned tube 2, control.Main burner 14 forms combustion air and entrainments flue gas hybrid channel with radiant tube 13 inwalls.
The flue gas that main burner 14 burnings produce is passed to heat exchanger import along radiant tube tube side, along dipteron chip bulb 1 and finned tube 2, enter heat exchanger, by the iris action of fin deflection plate 2.3, along finned tube 2 outside fin deflection plates 2.3 form upper and lower cross-current to, exhaust gases passes is significantly lengthened by baffling effect.Flue gas enters intermediate conductor 5 after dipteron chip bulb 1 and finned tube 2 heat exchange, and wherein part of smoke is entrainmented and entered hybrid channel and send into 14 burnings of main burner by the high velocity jet effect of preheated air; Another part flue gas enters external heat exchange portion, by being arranged on flue gas deflection plate 8 on external heat-exchanging pipe 7, continuing to be staggered to form up and down secondary baffling flue gas and carries out heat exchange, discharges after completing two-pass heat exchange from smoke outlet tube 11.
Inner side air along intermediate conductor 5(with reference to Fig. 1) ejection is through after the inner side fin 2.1 of finned tube 2 and the inner side strip fin of dipteron chip bulb 1 1.2 and outside flue gas heat exchange, along the hot air duct 3 in finned tube 2, turn back and flow to air-spray pipe 4
Air enters from air blast pipe 12, by external air conduit 10, enter external heat exchange portion, after completing heat exchange by external heat-exchanging pipe 7 and secondary baffling flue gas, by intermediate conductor 5, enter finned tube 2, Clearance Flow along 3 of finned tube 2 inner side fins 2.1 and hot air ducts is carried out after heat exchange with an outside baffling flue gas, pass through again inner side strip fin 1.2 heat exchange of dipteron chip bulb 1, return afterwards and enter hot air duct 3 and flow into air-spray pipe 4(as shown in Figure 3) complete inner heat transfer process.The hot-air that flows into air-spray pipe 4 sprays at a high speed by flow jeting port, after the negative pressure utilize to spray forming is entrainmented backflow to flue gas, enter radiant tube 13 combustion air conduits, and the air duct by combustion air conduit and main burner 14 burns after completing mixing.The flue gas that produces of burning after covering whole radiant tube tube side successively by dipteron chip bulb 1, finned tube 2, intermediate conductor 5, external heat-exchanging pipe 7, from smoke outlet tube 11, discharge again after completing the two-pass heat exchange with air.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of the claims in the present invention and equivalent technologies thereof, the intent of the present invention also comprises these changes and is out of shape interior.
Claims (10)
1. a baffle plate type radiation pipe burner tip heat exchanger, comprise two parts of built-in heat exchange portion and external heat exchange portion, built-in heat exchange portion mainly comprises the dipteron chip bulb of finned tube, finned tube end, the left end of finned tube connects intermediate conductor, in finned tube, be provided with hot air duct, the left end of hot air duct is fixedly connected with air-spray pipe, and the jet end of air-spray pipe passes from middle catheter wall; The right-hand member of intermediate conductor and external heat-exchanging pipe are fixed; External heat exchange portion mainly comprises smoke tube, inner external heat-exchanging pipe, the external heat-exchanging pipe inside center arranging of the smoke tube external air conduit that suspends, and smoke tube termination connects special-shaped flange; The left end of smoke tube is smoke outlet tube fixedly, right-hand member fixed air blast pipe, and air blast pipe penetrates from smoke tube, external heat-exchanging pipe, external air conduit from outside to inside successively, and fixing respectively with smoke tube, external heat-exchanging pipe, external air conduit; It is characterized in that: outer the placing at finned tube is provided with a plurality of fin deflection plates, a plurality of fin deflection plates are lower staggered being distributed on finned tube vertically, each fin deflection plate is semilune and the caliber that can be placed in radiant tube, make finned tube, fin deflection plate and radiant tube inwall form upper and lower alternative ring around a baffling exhaust gases passes; Finned tube arranged outside has outside fin, and fin deflection plate height protrudes from outside fin.
2. baffle plate type radiation pipe burner tip heat exchanger according to claim 1, it is characterized in that: on external heat-exchanging pipe, be provided with a plurality of flue gas deflection plates, a plurality of flue gas deflection plates are staggered being distributed on external heat-exchanging pipe vertically up and down, each flue gas deflection plate is semilune and the caliber that can be placed in smoke tube, make external heat-exchanging pipe, flue gas deflection plate and smoke tube inwall form upper and lower alternative ring around secondary baffling exhaust gases passes.
3. baffle plate type radiation pipe burner tip heat exchanger according to claim 2, is characterized in that: flue gas deflection plate and fin deflection plate be equi-spaced apart distribution separately vertically all, and is 4-8.
4. according to the baffle plate type radiation pipe burner tip heat exchanger one of claim 1-3 Suo Shu, it is characterized in that: finned tube inner side also arranges inner side fin, inner side fin and outside fin are the staggered pattern of cross and arrange; Inner side fin is unilateral to be axially in line and to arrange many rows along finned tube, and different rows' inner side fins circumferentially encircle in corresponding formation mutually at each; Outside fin unilateral vertical with finned tube axis is also arranged to a plurality of outer shrouds along finned tube external circumferential.
5. baffle plate type radiation pipe burner tip heat exchanger according to claim 4, is characterized in that: the outside fin of finned tube is at 14-18 fin of each outer shroud distribution, and inner side fin encircles a distribution 36-54 fin in each.
6. according to one of claim 1-3 or the baffle plate type radiation pipe burner tip heat exchanger described in 5, it is characterized in that: dipteron chip bulb is dome-type structure, along sphere bus, by top, to bottom, distinguished many inner side strip fins of radial arrangement and many outside strip fins.
7. baffle plate type radiation pipe burner tip heat exchanger according to claim 6, is characterized in that: inner side strip fin and outside strip fin are respectively distributed with 8-10 bar.
8. according to the baffle plate type radiation pipe burner tip heat exchanger described in one of claim 1-3 or 5 or 7, it is characterized in that: dipteron chip bulb, finned tube adopt heat resisting steel hot investment casting moulding.
9. adopt the heat-exchange method of one of the claims described baffle plate type radiation pipe burner tip heat exchanger, baffle plate type radiation pipe burner tip heat exchanger is connected with radiation pipe burner tip; Air-spray pipe is placed in the combustion air duct inlet of radiant tube, and main burner is connected with radiant tube igniting side; Finned tube and radiant tube inwall form exhaust gases passes, and main burner and radiant tube inwall form combustion air and entrainment flue gas hybrid channel;
It is characterized in that: exhaust gases passes is significantly lengthened by fin deflection plate and flue gas deflection plate, in heat transfer process, flue gas is carried out to baffling twice, lengthen flue gas heat exchange distance; And by fin deflection plate and flue gas deflection plate, flue gas flow direction is controlled;
Utilize the inside and outside staggered decussate texture of fin on finned tube that flue gas circulating face is increased; Utilize the inside and outside side strip fin of dipteron chip bulb that flue gas is conducted heat evenly.
10. method according to claim 9, is characterized in that: specifically comprise the steps:
The flue gas that main burner combustion produces is passed to heat exchanger import along radiant tube tube side, along dipteron chip bulb and finned tube, enters heat exchanger, by the iris action of fin deflection plate, forms a baffling flue gas carry out heat exchange along fin deflection plate; Flue gas enters intermediate conductor after dipteron chip bulb and finned tube heat exchange, and wherein part of smoke is entrainmented and entered hybrid channel and send into main burner combustion by the high velocity jet effect of preheated air; Another part flue gas enters external heat exchange portion, by being arranged on flue gas deflection plate on external heat-exchanging pipe, continuing to be staggered to form up and down secondary baffling flue gas and carries out heat exchange, discharges after completing two-pass heat exchange from smoke outlet tube;
Inner side air, turns back and flows to air-spray pipe along the hot air duct in finned tube along intermediate conductor ejection after the inner side fin of finned tube and the inner side strip fin and outside flue gas heat exchange of dipteron chip bulb;
Air enters from air blast pipe, by external air conduit, enter external heat exchange portion, after completing heat exchange by external heat-exchanging pipe and secondary baffling flue gas, by intermediate conductor, enter finned tube, along the Clearance Flow between fin inside finned tube and hot air duct and an outside baffling flue gas, carry out after heat exchange, pass through again the inner side strip fin heat exchange of dipteron chip bulb, return afterwards and enter hot air duct and flow into air-spray pipe and complete inner heat transfer process;
The hot-air that flows into air-spray pipe sprays at a high speed by flow jeting port, utilize to spray after the negative pressure forming is entrainmented backflow to flue gas to enter radiant tube combustion air conduit, and the air duct by combustion air conduit and main burner burns after completing mixing; The flue gas that produces of burning after covering whole radiant tube tube side successively by dipteron chip bulb, finned tube, intermediate conductor, external heat-exchanging pipe, from smoke outlet tube, discharge again after completing the two-pass heat exchange with air.
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| WO2018079482A1 (en) * | 2016-10-28 | 2018-05-03 | 株式会社トウネツ | Immersion-type burner heater and molten-metal holding furnace |
| CN109790980A (en) * | 2016-09-29 | 2019-05-21 | 杰富意钢铁株式会社 | The manufacturing method of heat exchanger, radiant tube type heating device and heat exchanger |
| CN110327742A (en) * | 2019-08-05 | 2019-10-15 | 巢湖云海镁业有限公司 | A kind of exhaust gas absorption device of aluminum alloy die casting production |
| CN112303625A (en) * | 2020-10-09 | 2021-02-02 | 北京科技大学 | Gas radiant tube heat exchanger |
| US11020796B2 (en) | 2016-10-28 | 2021-06-01 | Tounetsu Co., Ltd. | Immersion-type burner heater and molten-metal holding furnace |
| CN114110642A (en) * | 2021-12-08 | 2022-03-01 | 沃睿迪(广东)科技有限公司 | Smart city environment-friendly heat supply system and method |
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| CN107084391A (en) * | 2017-06-08 | 2017-08-22 | 中冶京诚(扬州)冶金科技产业有限公司 | A kind of air preheating type radiant tube burner |
| CN110327742A (en) * | 2019-08-05 | 2019-10-15 | 巢湖云海镁业有限公司 | A kind of exhaust gas absorption device of aluminum alloy die casting production |
| CN112303625A (en) * | 2020-10-09 | 2021-02-02 | 北京科技大学 | Gas radiant tube heat exchanger |
| CN114110642A (en) * | 2021-12-08 | 2022-03-01 | 沃睿迪(广东)科技有限公司 | Smart city environment-friendly heat supply system and method |
| CN114110642B (en) * | 2021-12-08 | 2022-11-08 | 中建三局绿色产业投资有限公司 | Smart city environment-friendly heat supply system and method |
| CN114739129A (en) * | 2022-04-08 | 2022-07-12 | 郑州沃特节能科技股份有限公司 | Drying system based on heat recovery is recycled |
| CN114739129B (en) * | 2022-04-08 | 2023-09-26 | 郑州沃特节能科技股份有限公司 | Drying system based on waste heat recovery and recycling |
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Address after: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: Zhongye South (Wuhan) Thermal Engineering Co., Ltd. Address before: 430223 No. 33, University Garden Road, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: WISDRI (Wuhan) WIS Industrial Furnace Co., Ltd. |