CN202757126U - Radiant tube nozzle heat exchanger with finned pipe - Google Patents
Radiant tube nozzle heat exchanger with finned pipe Download PDFInfo
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- CN202757126U CN202757126U CN201220373278XU CN201220373278U CN202757126U CN 202757126 U CN202757126 U CN 202757126U CN 201220373278X U CN201220373278X U CN 201220373278XU CN 201220373278 U CN201220373278 U CN 201220373278U CN 202757126 U CN202757126 U CN 202757126U
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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 utility model relates to a radiant tube nozzle heat exchanger with a finned pipe. Both a gas inlet pipe and a gas outlet pipe extend into a smoke guide pipe to be communicated with a gas heat exchange pipe. Two ends of the gas guide pipe are closed, and the gas guide pipe is suspended and fixed on the gas heat exchange pipe. The gas heat exchange pipe is connected with an air guide pipe through a middle blind. An air inlet pipe extends into the smoke guide pipe, is smoothly bent into an L shape and is fixed to the middle blind. The air guide pipe extends rightwards out of the smoke guide pipe to be connected with a finned heat exchange pipe with inner and outer fins. A plug is fixed at the right end of the finned heat exchange pipe. An L-shaped air jet pipe is connected to the left end of a middle guide pipe at the center of the finned heat exchange pipe. The air jet pipe penetrates down through the air guide pipe. Air heat exchange areas at right and left ends of the middle guide pipe are communicated with each other. A smoke outlet pipe is disposed outside the smoke guide pipe. Air can be preheated by smoke to preheat gas. Combusting smoke is entrained to reflow, so that air preheating temperature is increased greatly and emission of combustion products, namely nitride oxides, is decreased.
Description
Technical field
The utility model relates to technical field of heat exchange devices, relates in particular to that a kind of and radiation pipe burner tip support the use, air and gas double pre-heating heat-exchanger rig.
Background technology
In the metal heat treatmet field, for fear of flame directly contact with product or since technique to the demand of special atmosphere, the method that adopts radiant tube to carry out indirect has obtained using 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 comprised of heat exchanger and main burner two parts usually.Heat exchanger comes warm-up combustion-supporting air by the waste heat recovery to self flue gas, and main burner is then organized air and gas-fired by 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 pattern is arranged usually: (1) adopts the heat exchanger of inside and outside twin fin structure, namely the structural shape of fin is added in and the outside inboard at heat exchanger simultaneously, or strengthens heat transfer 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) the 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 namely the heat exchanger outer tube arranges finned tube, and inner tube adopts the multiple-pass jet structure to improve heat transfer 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 by 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 decrease, the thermal efficiency are very high.
Existing radiation pipe burner tip heat exchanger is on structural design, all 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.
The utility model content
The technical problems to be solved in the utility model provides a kind of air and gas double pre-heating, two-pass yi word pattern structure, entrainments the radiation pipe burner tip heat exchanger with finned tube of structure with the air outlet slit jet flow.
The utility model is to address the above problem the technical scheme that adopts to be:
A kind of radiation pipe burner tip heat exchanger with finned tube is characterized in that: by outer smoke tube, coal gas heat exchanger tube, the gas-pipe line of being arranged with toward in; Gas inlet pipe and gas outlet tube all stretch into smoke tube inside and communicate gas-pipe line closed at both ends and unsettled being fixed on the coal gas heat exchanger tube with the coal gas heat exchanger tube; The air conduit of coal gas heat exchanger tube and right-hand member links to each other by middle closure plate; The air blast pipe stretch into behind the smoke tube inside round and smooth transfer L-type to and be fixed in the middle of on the closure plate, be 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 air heat-exchange regional connectivity of intermediate conductor right-hand member and left end; The outer setting smoke outlet tube of smoke 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 smoke outlet tube external diameter 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 by bracing or strutting arrangement.
By technique scheme, 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.
According to such scheme, plug is water conservancy diversion shape structure, and end cap is provided with the circulation road that is communicated with fin heat exchange pipe and air conduit and intermediate conductor, and the continuous sealing welding is fixed 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 simultaneously the installing hole that is connected usefulness with radiant tube, and special-shaped flange and smoke tube continuous welding are fixed.
When adopting above-mentioned heat exchanger to carry out heat exchange: 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 enters from the air blast pipe, by air conduit and through entering fin heat exchange pipe after the air conduit speed-raising, after flue gas carries out heat exchange outside the fin heat exchange pipe, the process plug returns and flows into the air jet pipe through intermediate conductor, spray to radiant tube at a high speed by flow jeting port, the negative pressure that utilize to spray forms is entrainmented to reflux to flue gas and is entered the combustion air conduit under backward, and burns after finishing mixing by the air duct of combustion air conduit and main burner; After coal gas enters 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 by 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 by gas outlet tube and is burnt;
The flue gas that burning produces is then successively by the air heat-exchange side exhaust gases passes between fin heat exchange pipe and radiant tube inwall, the air heat-exchange of elder generation in air heat-exchange zone and air conduit, then enter the coal gas heat exchange zone in the smoke tube, 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.
With respect to prior art, the beneficial effects of the utility model:
1, " yi word pattern " or linear pattern two-pass structure heat exchanger design is divided into air heat-exchange and two parts of coal gas heat exchange by middle closure plate with heat exchanger, realizes the two preheatings of space gas of radiation pipe burner tip heating;
2, preheated air outlet jet structure design by 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 in conjunction with, and have promoted greatly the recovery to the combustion product gases sensible heat, and exhaust gas temperature significantly reduces, and exchanger heat efficient significantly improves.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
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, closure plate in the middle of the 5-air conduit, 6-, 7-abnormity flange, 8-air blast pipe, the 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, 16-flow jeting port, 17-combustion air conduit, the 18-heat exchanger, 19-radiant tube, 20-master's burner.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
Referring to Fig. 1-4, the radiation pipe burner tip heat exchanger with finned tube according to the utility model is implemented entrainments the radiation pipe burner tip heat exchanger of structure for two-pass yi word pattern structure, with the 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 with fin heat exchange pipe 2 by the continuous sealing welding.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 continuous sealing to be welded and fixed between the fin heat exchange pipe 2.Air jet pipe 4 elbows be positioned at fin heat exchange pipe 2 RC intermediate conductors 3 and be welded and fixed, and pass from air conduit 5 downwards.Air jet pipe 4 adopts numerical control fine finishining moulding, accurately controls by 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 round and smooth L-type, L-type is vertically held from the reservation perforate of smoke tube 9 and is vertically penetrated, pass successively the gas-pipe line 13 of coal gas heat exchanger tube 12 and innermost layer, the 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 inwall of coal gas heat exchanger tube 12 are welded and fixed, and air conduit 5 inner spaces on middle closure plate 6 right sides are the 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 center, is equipped with the sealed tube of plug for the left and right sides, and gas-pipe line 13 is fixed by uniform bracing frame and the spot welding of coal gas heat exchanger tube all around.Thus, the elongated annular space that gas-pipe line 13 and coal gas heat exchanger tube are 12 can with the coal gas speed-raising that passes into, be accelerated heat exchange efficiency.
Fig. 3 has provided the embodiment when air jet pipe 4 supports the use with radiant tube 19.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, flow jeting port 16 outer rims and radiant tube 19 inwalls form and entrainment exhaust gases passes, by the negative pressure that flow jeting port 16 combustion air high velocity jet form flue gas is entrainmented backflow, entrainment the flue gas and the combustion air blending that enter, and send into radiant tube 19 combustion sides by combustion air conduit 17.Entrainment the backflow effect by flue gas, the combustion air preheat temperature can reach 650 ℃.
The embodiment of heat exchanger when Fig. 4 has provided and supported the use with main burner 20 and radiant tube 19.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 by 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 enters from air blast pipe 8, by air conduit 5 and through entering fin heat exchange pipe 2 after air conduit 5 speed-raisings, 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 pass through flow jeting port 16 at a high speed to radiant tube 19 ejections, the negative pressure that utilize to spray forms is entrainmented to reflux to flue gas and is entered combustion air conduit 17 under backward, and burns after finishing mixing by the air duct of combustion air conduit 17 and main burner 20.After coal gas enters 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 by 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 by gas outlet tube 14 and is burnt.The flue gas that burning produces is then successively by the air heat-exchange side exhaust gases passes between fin heat exchange pipe 2 and radiant tube 19 inwalls, the air heat-exchange of elder generation in air heat-exchange zone and air conduit 5, then enter the coal gas heat exchange zone in the smoke tube 9, 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 domain of the present utility model is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and not break away from scope and spirit of the present utility model the utility model.If these changes and distortion belong in the scope of the utility model claim and equivalent technologies thereof, then intention of the present utility model also comprises these changes and is out of shape interior.
Claims (7)
1. the radiation pipe burner tip heat exchanger with finned tube is characterized in that: by outer smoke tube, coal gas heat exchanger tube, the gas-pipe line of being arranged with toward in; Gas inlet pipe and gas outlet tube all stretch into smoke tube inside and communicate gas-pipe line closed at both ends and unsettled being fixed on the coal gas heat exchanger tube with the coal gas heat exchanger tube; The air conduit of coal gas heat exchanger tube and right-hand member links to each other by middle closure plate; The air blast pipe stretch into behind the smoke tube inside round and smooth transfer L-type to and be fixed in the middle of on the closure plate, be 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 air heat-exchange regional connectivity of intermediate conductor right-hand member and left end; The outer setting smoke outlet tube of smoke 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 smoke outlet tube external diameter 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, it is characterized in that: the coal gas heat exchanger tube is fixed on the smoke tube inwall by bracing or strutting arrangement.
5. according to claim 1 and 2 or 4 described radiation pipe burner tip heat exchangers, it is characterized in that: 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, it is characterized in that: plug is water conservancy diversion shape structure, end cap is provided with the circulation road that is communicated with fin heat exchange pipe and air conduit and intermediate conductor, and the continuous sealing welding is fixed with fin heat exchange pipe.
7. 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 according to claim 1 and 2 or 4 or 6 described radiation pipe burner tip heat exchangers; 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 simultaneously the installing hole that is connected usefulness with radiant tube, and special-shaped flange and smoke tube continuous welding are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220373278XU CN202757126U (en) | 2012-07-31 | 2012-07-31 | Radiant tube nozzle heat exchanger with finned pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220373278XU CN202757126U (en) | 2012-07-31 | 2012-07-31 | Radiant tube nozzle heat exchanger with finned pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202757126U true CN202757126U (en) | 2013-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220373278XU Expired - Fee Related CN202757126U (en) | 2012-07-31 | 2012-07-31 | Radiant tube nozzle heat exchanger with finned pipe |
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| Country | Link |
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| CN (1) | CN202757126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111423A (en) * | 2021-12-03 | 2022-03-01 | 青岛新力通热工科技有限公司 | Manufacturing process of flue gas bipolar heat exchanger for radiant tube burner |
-
2012
- 2012-07-31 CN CN201220373278XU patent/CN202757126U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111423A (en) * | 2021-12-03 | 2022-03-01 | 青岛新力通热工科技有限公司 | Manufacturing process of flue gas bipolar heat exchanger for radiant tube burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20140731 |
|
| EXPY | Termination of patent right or utility model |