CN102759109A - Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method - Google Patents
Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method Download PDFInfo
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- CN102759109A CN102759109A CN201210268147XA CN201210268147A CN102759109A CN 102759109 A CN102759109 A CN 102759109A CN 201210268147X A CN201210268147X A CN 201210268147XA CN 201210268147 A CN201210268147 A CN 201210268147A CN 102759109 A CN102759109 A CN 102759109A
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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
Abstract
The invention relates to an air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and a heat exchange method. A coal gas inlet pipe and a coal gas outlet pipe both extend into a flue gas duct to be communicated with a coal gas exchange pipe; two ends of the flue gas duct are sealed and fixedly arranged on the coal gas exchange pipe; the coal gas exchange pipe and an air duct on the left end are connected through a middle closure plate; an air blast pipe vertically extends into the flue gas duct to be smoothly converted into an L shape and fixed on the middle closure plate; the air duct is connected to a finned heat exchange pipe with inner and outer fins structure; a choke plug is fixed on the right end of the finned heat exchange pipe; the middle duct in the center of the finned heat exchange pipe is connected to an L-shaped air jetting pipe; and the air jetting pipe penetrates through the air duct downwards. The radiation pipe burner heat exchanger is divided into two parts of an air heat exchange and a coal gas heat exchange through the middle closure plate to realize both preheating of air and coal gas; through entrainment and reflux of combustion flue gas, the air preheating temperature is greatly improved, the discharge of a combustion product of nitric oxides is reduced; as the double finned pipes heat exchanger and a coal gas light pipe heat exchanger are used in a matching way, the heat exchange efficiency is greatly improved.
Description
Technical field
The present invention relates to technical field of heat exchange devices, relate in particular to a kind of and the supporting use of radiation pipe burner tip, air and gas double pre-heating heat-exchanger rig and method.
Background technology
In the metal heat treatmet field, for fear of flame and product directly contact or since technology to the demand of special atmosphere, the method that adopts radiant tube to carry out indirect has obtained application more and more widely.Radiant tube is general to adopt supporting with it radiation pipe burner tip to heat, and radiation pipe burner tip is made up of heat exchanger and main burner two parts usually.Heat exchanger comes warm-up combustion-supporting air through the waste heat recovery to self flue gas, and main burner is then organized air and gas-fired through structural design, regulates flame profile, control radiant tube surface temperature uniformity.
Development along with the radiant tube heating technique; In the design of heat exchanger structure; Following several kinds of patterns are arranged usually: the heat exchanger of inside and outside twin fin structure is adopted in (1); Promptly the structural shape of fin is added in the inboard and outside simultaneously at heat exchanger, or strengthens the heat exchange effect in the mode that the heat exchanger tube table adds pitted skin.Usually under 1000 ℃ flue-gas temperature, this heat exchanger can be with air preheat to 400 ℃, and heat exchange efficiency is relatively poor; (2) stroke jet structure heat exchanger such as, this heat exchanger adopts the jet flow stroke to add the structural shape of finned tube more, and promptly the heat exchanger outer tube is provided with finned tube, and interior pipe adopts the multiple-pass jet structure to improve the heat exchange effect.Under 1000 ℃ flue-gas temperature, air can be preheating to more than 500 ℃, and exhaust gas temperature drops to below 600 ℃, and heat exchange efficiency is higher.(3) the return-flow structure heat exchanger is entrainmented in employing, and this heat exchanger entrainments reflux through adding flue gas, and flue gas is entrainmented in the combustion air; Under 1000 ℃ flue-gas temperature; Air preheating temperature can reach 650 ℃, and discharged nitrous oxides reduces significantly, and the thermal efficiency is very high.
Existing radiation pipe burner tip heat exchanger is on structural design; All only only considered combustion air is carried out preheating; Do not consider coal gas is carried out preheating; Under the exhaust gas temperature of existing radiant tube (500-700 ℃), can utilize the flue gas after the heat exchange that coal gas is carried out preheating fully, realize the two preheatings of space gas of radiation pipe burner tip.
Summary of the invention
The technical problem that the present invention will solve provides a kind of air and gas double pre-heating, two-pass yi word pattern structure, band air outlet slit jet flow are entrainmented the radiation pipe burner tip heat exchanger and the heat-exchange method of structure.
The present invention addresses the above problem the technical scheme that is adopted to be:
The two preheating fin tube type radiation pipe burner tip heat exchangers of a kind of space gas is characterized in that: be provided with smoke tube, coal gas heat exchanger tube, gas-pipe line by outer toward interior concentric locking collar; Gas inlet pipe and gas outlet tube stretch into vertically all that smoke tube is inner to communicate with the coal gas heat exchanger tube, gas-pipe line closed at both ends and be arranged on the center of coal gas heat exchanger tube through bracing or strutting arrangement; The air conduit of coal gas heat exchanger tube and right-hand member links to each other through middle closure plate; L type air blast pipe vertically passes smoke tube, coal gas heat exchanger tube and gas-pipe line, and horizontal ends is passed the gas-pipe line right-hand member and is fixed on the middle closure plate, is communicated with the air conduit on right side; Air conduit is turned right and is stretched out the fin heat exchange pipe that smoke tube connects inside and outside twin fin structure, and the right-hand member of fin heat exchange pipe is plug fixedly; The intermediate conductor left end at fin heat exchange pipe center connects L type air jet pipe, and the air jet pipe is passed down through air conduit; The intermediate conductor right-hand member is through plug and fin heat exchange pipe and the outer air heat exchange regional connectivity of air conduit inner air jet pipe; The external vertical of smoke tube is provided with smoke outlet tube.
By technique scheme, the air conduit on burner heat exchanger right side can stretch into the smoke outlet tube in the radiant tube, and the exhanst gas outlet external diameter of pipe is greater than the external diameter of fin heat exchange pipe and air conduit, and is communicated with smoke tube.
By technique scheme, tapered the dwindling of lower end flow jeting port of air jet pipe.
By technique scheme, the coal gas heat exchanger tube is fixed on the smoke tube inwall through bracing or strutting arrangement.
By technique scheme, inside and outside fin is arranged 36-54 along the axial even tube wall interlaced arrangement of heat exchanger tube based on the every circle of heat exchanger tube diameter.
According to such scheme, plug is a water conservancy diversion shape structure, and the end cap inboard is provided with the circulation road that is communicated with fin heat exchange pipe and air conduit and intermediate conductor, and fixes with fin heat exchange pipe.
According to such scheme, the special-shaped flange that the right-hand member setting of smoke tube links to each other with radiant tube; The upper flanges dish of abnormity flange is shorter than the lower end ring flange, on the ring flange of lower end gripper shoe is set, and is provided with the installing hole that is connected usefulness with radiant tube simultaneously, and special-shaped flange and smoke tube continuous welding are fixed.
Adopt the heat-exchange method of above-mentioned heat exchanger; It is characterized in that: special-shaped flange is connected with radiant tube; The radiant tube inside of packing into, the air heat exchange zone of heat exchanger; Fin heat exchange pipe and radiant tube inwall laterally form exhaust gases passes, and the flow jeting port of air jet pipe is vertically concentric with the combustion air conduit, and flow jeting port outer rim and radiant tube inwall form and entrainment exhaust gases passes;
Combustion air gets into from the air blast pipe; Get into fin heat exchange pipe through air conduit and through air conduit speed-raising back; After flue gas carried out heat exchange outside the fin heat exchange pipe, the process plug returned and flows into the air jet pipe through intermediate conductor, sprays to radiant tube at a high speed through flow jeting port; Utilize the negative pressure of spraying formation that flue gas is entrainmented the backflow back and get into the combustion air conduit downwards, and burn after the air duct completion mixing through combustion air conduit and main burner; After coal gas gets into from the gas inlet pipe; Through the elongated circular passage speed-raising between gas-pipe line and coal gas heat exchanger tube; And carrying out heat exchange through the flue gas between coal gas heat exchanger tube and smoke tube, the preheating gas after the heat exchange is then sent into main burner through gas outlet tube and is burnt;
The flue gas that burning is produced is then successively through the air heat exchange side exhaust gases passes between fin heat exchange pipe and radiant tube inwall; Air heat exchange in air heat exchange zone and air conduit earlier; Get into the coal gas heat exchange zone in the smoke tube then; With the coal gas heat exchange in the coal gas heat exchanger tube, the flue gas after the heat exchange is discharged from smoke outlet tube.
The beneficial effect of the invention:
1, " yi word pattern " or linear pattern two-pass structure design of heat exchanger are divided into air heat exchange and two parts of coal gas heat exchange through middle closure plate with heat exchanger, realize the two preheatings of space gas of radiation pipe burner tip heating;
2, preheated air outlet jet structure design through the backflow of entrainmenting to combustion product gases, can significantly improve air preheating temperature, reduces the discharging of combustion product nitrogen oxide, reduces the discharging of pollutant;
3, air twin fin tubular construction heat exchanger and coal gas light-pipe structure heat exchanger are used, and have promoted the recovery to the combustion product gases sensible heat greatly, and exhaust gas temperature significantly reduces, and exchanger heat efficient significantly improves.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is air jet pipe and the matching used structural representation of radiant tube;
Fig. 4 is and main burner and the matching used structural representation of radiant tube.
Among the figure: 1-plug, 2-fin heat exchange pipe, 3-intermediate conductor, 4-air jet pipe, 5-air conduit; Closure plate in the middle of the 6-, 7-abnormity flange, 8-air blast pipe, 9-smoke tube, 10-smoke outlet tube; 11-gas inlet pipe, 12-coal gas heat exchanger tube, 13-gas-pipe line, 14-gas outlet tube, 15-radiant tube heat exchanger interface; The 16-flow jeting port, 17-combustion air conduit, 18-heat exchanger, 19-radiant tube, 20-master's burner.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present invention is done further explanation.
Referring to Fig. 1-4, the two preheating fin tube type radiation pipe burner tip heat exchangers of the space gas of implementing according to the present invention entrainment the radiation pipe burner tip heat exchanger of structure for two-pass yi word pattern structure, band air outlet slit jet flow, can carry out air and gas double pre-heating.It comprises plug 1, adopts water conservancy diversion shape structural design, and the hot investment casting moulding is fixing through continuous sealing welding and fin heat exchange pipe 2.Fin heat exchange pipe 2 is heat resisting steel hot investment casting moulding, inside and outside twin fin structural design, and inside and outside fin is adjusted every circle according to the heat exchanger tube diameter and is arranged that 36-54 is not waited along the axial even tube wall interlaced arrangement of heat exchanger tube.Adopt sealing welding continuously to fix between the fin heat exchange pipe 2.Air jet pipe 4 elbows are fixed with being positioned at fin heat exchange pipe 2 RC intermediate conductor 3 welding, and pass from air conduit 5 downwards.Air jet pipe 4 adopts numerical control fine finishining moulding, accurately controls through curved shape, caliber and ejection length to the preheated air outlet, guarantees reasonably to spray flow velocity.Abnormity flange 7 adopts stainless-steel sheet machine-shaping, and special-shaped flange 7 is provided with gripper shoe, is provided with simultaneously with radiant tube 19 to be connected with installing hole (as shown in Figure 4), and special-shaped flange 7 is fixed with the termination continuous welding of smoke tube 9; Smoke tube 9 adopts seamless steel pipe machine-shaping; Be vertically installed with smoke outlet tube 10, gas inlet pipe 11, gas outlet tube 14 and air blast pipe 8 on the tube wall; Smoke outlet tube 10 is fixed with smoke tube 9 continuous weldings; Air blast pipe 8 is slick and sly L type; The L type is vertically held from the reservation perforate of smoke tube 9 and is vertically penetrated, and passes the gas-pipe line 13 of coal gas heat exchanger tube 12 and innermost layer successively, and L type horizontal ends is passed gas-pipe line 13 right side plugs to the right and is connected with the center, left side of middle closure plate 6; The outer ledge of middle closure plate 6 and the welding of the inwall of coal gas heat exchanger tube 12 are fixing, and air conduit 5 inner spaces on middle closure plate 6 right sides are air heat exchange zone; Gas inlet pipe 11 and gas outlet tube 14 each reservation perforate since smoke tube 9 vertically penetrate and are connected with coal gas heat exchanger tube 12 respectively, and smoke tube 9 inboards are coal gas heat exchange zone from the zone that middle closure plate 6 is turned left.
Coal gas heat exchanger tube 12 is the stainless steel light-pipe structure, and coal gas heat exchanger tube 12 left and right sides are equipped with closure plate, closure plate 6 in the middle of the closure plate on right side is; On middle closure plate 6 right sides, coal gas heat exchanger tube 12 is fixed with intermediate conductor 3 continuous weldings, and middle closure plate 6 separates about air heat exchange zone and coal gas heat exchange zone.Gas-pipe line 13 is positioned at the heat exchanger tube centermost, for the left and right sides is equipped with the sealed tube of plug, gas-pipe line 13 through around the bracing frame and the spot welding of coal gas heat exchanger tube that are uniformly distributed with fix.Thus, the elongated annular space that gas-pipe line 13 and coal gas heat exchanger tube are 12 can be accelerated heat exchange efficiency with the coal gas speed-raising that feeds.
Embodiment when Fig. 3 has provided air jet pipe 4 and radiant tube 19 supporting uses.Radiant tube 19 inside of packing into, heat exchanger air heat exchange zone; Fin heat exchange pipe 2 forms exhaust gases passes with radiant tube 19 inwalls; The flow jeting port 16 of air jet pipe 4 is concentric with combustion air conduit 17, and flow jeting port 16 outer rims and radiant tube 19 inwalls form and entrainment exhaust gases passes, through the negative pressure that flow jeting port 16 combustion air high velocity jet form flue gas are entrainmented backflow; Entrainment the flue gas and the combustion air blending of entering, and send into radiant tube 19 combustion sides through combustion air conduit 17.Entrainment the backflow effect through flue gas, the combustion air preheat temperature can reach 650 ℃.
The embodiment of heat exchanger when Fig. 4 has provided with main burner 20 and radiant tube 19 supporting uses.Heat exchanger abnormity flange 7 is connected with radiant tube 19 heat exchanger sides, and main burner 20 is connected with radiant tube 19 combustion sides through bolt.Fin heat exchange pipe 2 forms air heat exchange side exhaust gases passes with radiant tube 19 inwalls; Form the smoke backflow passage between flow jeting port 16 outer rims of air jet pipe 4 and radiant tube 19 inwalls, the pipeline section between main burner 20 and radiant tube 19 inwalls forms combustion air and entrainments the flue gas hybrid channel.Combustion air gets into from air blast pipe 8; Get into fin heat exchange pipe 2 through air conduit 5 and through air conduit 5 speed-raising backs; After carrying out heat exchange with fin heat exchange pipe 2 outside flue gases; Return through intermediate conductor 3 inflow air jet pipes 4 through plug 1; And through flow jeting port 16 at a high speed to radiant tube 19 ejections, utilize and spray the negative pressure that forms and flue gas is entrainmented the back of refluxing get into combustion air conduit 17 downwards, and accomplish through the air duct of combustion air conduit 17 and main burner 20 and to burn after mixing.After coal gas gets into from gas inlet pipe 11; The elongated circular passage speed-raising that process gas-pipe line 13 and gas heat exchanger tube are 12; And carrying out heat exchange through the flue gas of 9 of coal gas heat exchanger tube 12 and smoke tubes, the preheating gas after the heat exchange is then sent into main burner 20 through gas outlet tube 14 and is burnt.The flue gas that burning is produced is then successively through the air heat exchange side exhaust gases passes between fin heat exchange pipe 2 and radiant tube 19 inwalls; Air heat exchange in air heat exchange zone and air conduit 5 earlier; Get into the coal gas heat exchange zone in the smoke tube 9 then; With the coal gas heat exchange in the coal gas heat exchanger tube 12, the flue gas after the heat exchange is discharged from smoke outlet tube 10.
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 do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.
Claims (8)
1. the two preheating fin tube type radiation pipe burner tip heat exchangers of space gas is characterized in that: be provided with smoke tube, coal gas heat exchanger tube, gas-pipe line by outer toward interior concentric locking collar; Gas inlet pipe and gas outlet tube stretch into vertically all that smoke tube is inner to communicate with the coal gas heat exchanger tube, gas-pipe line closed at both ends and be arranged on the center of coal gas heat exchanger tube through bracing or strutting arrangement; The air conduit of coal gas heat exchanger tube and right-hand member links to each other through middle closure plate; L type air blast pipe vertically passes smoke tube, coal gas heat exchanger tube and gas-pipe line, and horizontal ends is passed the gas-pipe line right-hand member and is fixed on the middle closure plate, is communicated with the air conduit on right side; Air conduit is turned right and is stretched out the fin heat exchange pipe that smoke tube connects inside and outside twin fin structure, and the right-hand member of fin heat exchange pipe is plug fixedly; The intermediate conductor left end at fin heat exchange pipe center connects L type air jet pipe, and the air jet pipe is passed down through air conduit; The intermediate conductor right-hand member is through plug and fin heat exchange pipe and the outer air heat exchange regional connectivity of air conduit inner air jet pipe; The external vertical of smoke tube is provided with smoke outlet tube.
2. radiation pipe burner tip heat exchanger according to claim 1; It is characterized in that: the air conduit on burner heat exchanger right side can stretch into the smoke outlet tube in the radiant tube; The exhanst gas outlet external diameter of pipe is greater than the external diameter of fin heat exchange pipe and air conduit, and is communicated with smoke tube.
3. radiation pipe burner tip heat exchanger according to claim 1 and 2 is characterized in that: tapered the dwindling of lower end flow jeting port of air jet pipe.
4. radiation pipe burner tip heat exchanger according to claim 3 is characterized in that: the coal gas heat exchanger tube is fixed on the smoke tube inwall through bracing or strutting arrangement.
5. according to claim 1 or 2 or 4 described radiation pipe burner tip heat exchangers, it is characterized in that: outer fin is arranged 36-54 along the axial even tube wall interlaced arrangement of heat exchanger tube according to the every circle of heat exchanger tube diameter.
6. radiation pipe burner tip heat exchanger according to claim 5 is characterized in that: plug is a water conservancy diversion shape structure, and the end cap inboard is provided with the circulation road that is communicated with fin heat exchange pipe and air conduit and intermediate conductor, and fixes with fin heat exchange pipe.
7. according to claim 1 or 2 or 4 or 6 described radiation pipe burner tip heat exchangers, it is characterized in that: the special-shaped flange that the right-hand member setting of smoke tube links to each other with radiant tube; The upper flanges dish of abnormity flange is shorter than the lower end ring flange, on the ring flange of lower end gripper shoe is set, and is provided with the installing hole that is connected usefulness with radiant tube simultaneously, and special-shaped flange and smoke tube continuous welding are fixed.
8. one of require the heat-exchange method of described radiation pipe burner tip heat exchanger based on aforesaid right; It is characterized in that: special-shaped flange is connected with radiant tube; The radiant tube inside of packing into, the air heat exchange zone of heat exchanger; Fin heat exchange pipe and radiant tube inwall laterally form exhaust gases passes; The flow jeting port of air jet pipe is vertically concentric with the combustion air conduit, and flow jeting port outer rim and radiant tube inwall form and entrainment exhaust gases passes;
Combustion air gets into from the air blast pipe; Get into fin heat exchange pipe through air conduit and through air conduit speed-raising back; After flue gas carried out heat exchange outside the fin heat exchange pipe, the process plug returned and flows into the air jet pipe through intermediate conductor, sprays to radiant tube at a high speed through flow jeting port; Utilize the negative pressure of spraying formation that flue gas is entrainmented the backflow back and get into the combustion air conduit downwards, and burn after the air duct completion mixing through combustion air conduit and main burner; After coal gas gets into from the gas inlet pipe; Through the elongated circular passage speed-raising between gas-pipe line and coal gas heat exchanger tube; And carrying out heat exchange through the flue gas between coal gas heat exchanger tube and smoke tube, the preheating gas after the heat exchange is then sent into main burner through gas outlet tube and is burnt;
The flue gas that burning is produced is then successively through the air heat exchange side exhaust gases passes between fin heat exchange pipe and radiant tube inwall; Air heat exchange in air heat exchange zone and air conduit earlier; Get into the coal gas heat exchange zone in the smoke tube then; With the coal gas heat exchange in the coal gas heat exchanger tube, the flue gas after the heat exchange is discharged from smoke outlet tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210268147XA CN102759109A (en) | 2012-07-31 | 2012-07-31 | Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method |
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| CN201210268147XA CN102759109A (en) | 2012-07-31 | 2012-07-31 | Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216864A (en) * | 2016-08-13 | 2016-12-14 | 江苏标新工业有限公司 | A kind of radial canal preheater assembly welding method |
| CN104807359B (en) * | 2014-01-28 | 2017-12-08 | 南京圣诺热管有限公司 | Built-in multistage jet flow tubular type fin heat exchange pipe and its manufacturing process |
| CN113531527A (en) * | 2021-06-24 | 2021-10-22 | 鞍钢股份有限公司 | High-efficient heat exchanger and combustor of gas radiant tube |
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| JP2006029638A (en) * | 2004-07-13 | 2006-02-02 | Toho Gas Co Ltd | Radiant tube burner |
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| CN102418936A (en) * | 2011-12-08 | 2012-04-18 | 中冶南方(武汉)威仕工业炉有限公司 | Air injecting and backflow flue gas entraining heat exchanger for radiant tube combustion device |
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2012
- 2012-07-31 CN CN201210268147XA patent/CN102759109A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006029638A (en) * | 2004-07-13 | 2006-02-02 | Toho Gas Co Ltd | Radiant tube burner |
| CN201581106U (en) * | 2009-10-26 | 2010-09-15 | 北京京杰锐思技术开发有限公司 | Gas radiating tube heating furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807359B (en) * | 2014-01-28 | 2017-12-08 | 南京圣诺热管有限公司 | Built-in multistage jet flow tubular type fin heat exchange pipe and its manufacturing process |
| CN106216864A (en) * | 2016-08-13 | 2016-12-14 | 江苏标新工业有限公司 | A kind of radial canal preheater assembly welding method |
| CN113531527A (en) * | 2021-06-24 | 2021-10-22 | 鞍钢股份有限公司 | High-efficient heat exchanger and combustor of gas radiant tube |
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Application publication date: 20121031 |