CN101915421B

CN101915421B - Radiant tube combustor

Info

Publication number: CN101915421B
Application number: CN2010102626878A
Authority: CN
Inventors: 吴懋林
Original assignee: CHANGSHU BURNER FACTORY Co Ltd
Current assignee: CHANGSHU BURNER FACTORY Co Ltd
Priority date: 2010-08-25
Filing date: 2010-08-25
Publication date: 2012-01-11
Anticipated expiration: 2030-08-25
Also published as: CN101915421A

Abstract

The invention relates to a radiant tube combustor and belongs to supporting facility of heating or annealing furnaces. The radiant tube combustor comprises an installation fixing plate, a radiant tube with a first patching base and a second patching base, a combustion air preheating mechanism fixed to the installation fixing plate together with the first patching base, a combustion mechanism fixed to the installation fixing plate together with the second patching base and arranged parallel to the combustion air preheating mechanism, and a hot air transition mechanism arranged between the combustion air preheating mechanism and the combustion mechanism. The radiant tube combustor is characterized in that the combustion air preheating mechanism comprises a fume discharge shell, a group of heat exchange tubes, a fume discharge shell fixed base, a fume pipe and a spacer bush, wherein each heat exchange tube is provided with an air inlet and an air outlet. The radiant tube combustor has the advantages of reducing the temperature of discharged fume so as to be beneficial to environment protection and saving energy consumed by the combustion mechanism.

Description

Radiant tube burner

Technical field

The invention belongs to the auxiliary facility technical field of heating or annealing furnace, be specifically related to a kind of radiant tube burner.

Background technology

Radiant tube burner below being not limited to, given an example such as the application on steel band continuous annealing furnace, Continuous Hot Dip Galvanizing Line reductive annealed oven, metal smelting furnace, metallic heat treating furnace and the various vertical and horizontal chamber furnace (oven) very extensively.Radiant tube burner mainly by the body of heater that is commonly referred to mounting plate fixedly wallboard, radiant tube, combustion air preheating mechanism, hot-air transition mechanism and combustion mechanism constitute, said structure can be seen in by the specification and the accompanying drawing of the disclosed radiant tube heater of Chinese utility model patent Granted publication CN201162030Y.The technical essential of CN201162030Y is that the back segment at the radiant tube of W type or U type is in the radiant tube pipeline section of the fourth line journey that flows to of burning gases an insert to be set; Use the complex heat transfer coefficient that is embodied in Instructions Page 2 the 4th to the 6th capable raising pipe of being put down in writing; The tube outer wall temperature is improved, improves the uniformity etc. of the temperature of tube outer wall.But this patent does not describe the detailed structure of combustion air preheating mechanism (patent is claimed the combustion air preheater), hot-air transition mechanism (patent is claimed bellows) and combustion mechanism (patent is claimed combustion system) and operation principle etc.

Be no lack of in patent documentation about the structure of combustion air preheating mechanism and be seen in; The radiant tube heat exchanger that typically provides like CN2295983Y; This patent scheme is provided with the heat exchanger fin with the body axially parallel in the radiant tube body, get into burner after the combustion air that the external world is got into is preheated to 350-450 ℃; And for example CN201163160Y that recommend with the heat exchanger matching used band inside and outside fin of radiation pipe burner tip; This patent scheme and aforesaid CN2295983Y structurally have similarity; Different is all to be processed with fin on the inside and outside wall body of CN201163160Y with heat exchanger tube; That is to say the runner that changes the combustion air in the shell side by the inner fin on the outer tube; So that combustion air obtains and the heat exchange effect of interior pipe, promptly the combustion air in the shell side (passage between the inner and outer pipes) is heated by the elevated temperature heat flue gas in the interior pipe (tube side).And CN2395983Y is provided with radial heat exchanger fin at the inwall of interior pipe, improves the heat exchange effect to the combustion air in the shell side by radial heat exchanger fin, specifically can be referring to Instructions Page 3 the 2nd to the 9th row of this patent.It is thus clear that these two patents all are to design according to the thinking that people are accustomed to, and promptly improve the heat exchange effect to combustion air by fin.But, facts have proved temperature increase that fin structure can not make combustion air degree to expectation, aforesaid CN2295983Y with air preheat to 350-450 ℃, and CN201163160Y with air preheat to 370-420 ℃.

Structure about combustion mechanism can be seen in patent documentation equally; Representative as CN2688011Y disclosed a kind of carborundum pharoid, publication number CN101266041A has disclosed a kind of radiation pipe burner tip and CN201269527Y has recommended the radiant tube nozzle; The characteristics of first patent in these three patented technologies are to adopt carborundum tube as heater outer tube (being the burner outer tube); Can improve the heat resistance of heater outer tube; Then two patents can embody the secondary mixing combination burning of air-flow; But the installation and maintenance (for example removing carbon) of combustion mouth is all cumbersome; Especially, owing to after the hot-air transition mechanism is introduced combustion mechanism, can not arrive the combustion mouth with the eddy flow state in advance through the combustion air after the preheating of combustion air preheating mechanism, so combustion air can not embody desirable mixed effect with mixing of combustion gas.

Summary of the invention

Top priority of the present invention is to provide a kind of radiant tube burner that helps making the combustion air preheating mechanism to improve the preheat temperature of combustion air preheating used both energy savings to reduce the exhaust temperature of useless flue gas.

Another task of the present invention be to provide a kind of help to make the hot-air transition mechanism that the air capacity that causes combustion mechanism is implemented to regulate and have the good adaptability of expanding with heat and contract with cold and use embody and combustion air preheating mechanism and combustion mechanism between the lasting radiant tube burner that connects effect.

Another task of the present invention be to provide a kind of be of value to making the hot-air that is incorporated into combustion mechanism by the hot-air transition mechanism arrive gas nozzle and using with the eddy flow state improve with the mixed effect of combustion gas and promote the radiant tube burner of efficiency of combustion.

Accomplish top priority of the present invention for embodying; Technical scheme provided by the invention is: a kind of radiant tube burner; Comprise mounting plate, have first matching seat and second matching seat radiant tube, take the fixing combustion air preheating mechanism of said first matching seat and mounting plate, take said second matching seat and combustion mechanism of with said combustion air preheating mechanism parallel that fix and be connected the hot-air transition mechanism between combustion air preheating mechanism and the combustion mechanism with mounting plate; Be characterised in that: said combustion air preheating mechanism comprises smoke discharging housing, one group of heat exchanger tube, smoke discharging housing holder, smoke exhaust pipe and spacer that respectively has air inlet and gas outlet; The smoke discharging housing has first, second and connects end and the 3rd connect end, and first connects end is used for being connected with useless flue gas fairlead pipeline, and second connects and hold and said hot-air transition mechanism connects; And the 3rd connect end and fix with smoke discharging housing holder; One end of one group of heat exchanger tube is placed in the radiant tube tube chamber of radiant tube, and the other end is positioned at the shell chamber of smoke discharging housing, and smoke discharging housing holder and said mounting plate are fixed; Said first matching seat is fixed on the said the 3rd and connects between end and the smoke discharging housing holder; Smoke exhaust pipe be positioned at said first connect end cavity volume, the smoke exhaust pipe tube chamber of this smoke exhaust pipe communicates with the radiant tube tube chamber of described radiant tube, the outer wall of smoke exhaust pipe and first connects between the inwall of end and constitutes the first air inlet air flue that a usefulness supplies outside air to introduce; And constitute the second air inlet air flue that communicates with the said first air inlet air flue between the inwall of the outer wall of the base portion of smoke exhaust pipe and said smoke discharging housing; Spacer is located in the shell chamber of smoke discharging housing, is connected with described one group of heat-exchange tube, in the spacer chamber of this spacer, axially is installed with a demarcation strip; One side of this demarcation strip constitutes air inlet half chamber; Air inlet half chamber communicates with the said second air inlet air flue, and communicates with the air inlet of said heat-exchange tube, and the opposite side of demarcation strip constitutes return-air half chamber; Return-air half chamber and said second connects end and communicates, and communicates with the gas outlet of said heat-exchange tube.

For embodying another task of the present invention of accomplishing; Technical scheme provided by the present invention is: described hot-air transition mechanism comprises having first adapter, second adapter, expansion sleeve and the thermal air current quantity regulating device of taking over the chamber; One end of first adapter and an end of expansion sleeve are tightly connected, and the other end and described second of first adapter connects end and is tightly connected, and the cavity volume that the tube chamber and second of first adapter connects end communicates; Second takes over the other end that is formed in expansion sleeve; And be tightly connected with described combustion mechanism, expansion sleeve is a corrugated nozzle, and the thermal air current quantity regulating device is arranged on described first and takes over.

Accomplish another task of the present invention for embodying, technical scheme provided by the invention is: described combustion mechanism comprises the combustion gas valve seat, has hot-air sleeve pipe, hot-air sleeve pipe holder, gas service pipe, igniter, gas nozzle cover, gas nozzle and the flow perturbation device of first, second adapting flange and hot-air introducing interface, and the combustion gas valve seat is fixedly connected with first adapting flange of hot-air sleeve pipe; And communicate with the hot-air chamber of hot-air sleeve pipe, second adapting flange of hot-air sleeve pipe and hot-air sleeve pipe holder are fixed, and hot-air sleeve pipe holder and said mounting plate are fixed; Described second matching seat is fixed between second adapting flange and the hot-air sleeve pipe holder; Said hot-air is introduced interface and is extended on the wall body of warm-air pipe, connects with described hot-air transition mechanism, and gas service pipe is positioned at said hot-air chamber; One end of this gas service pipe constitutes a combustion gas valve seat connector; This combustion gas valve seat connector is fixed with said combustion gas valve seat and is communicated with combustion gas air admission hole on the combustion gas valve seat, and the other end of gas service pipe reaches in the described radiant tube, and at the fixing described gas nozzle of this end; The gas nozzle cover is fixed in the radiant tube; Described gas nozzle is positioned at the gas nozzle cover, and igniter is positioned at said hot-air chamber, and an end and said combustion gas valve seat are fixed; The other end is stretched in the radiant tube; And be equipped with an igniter head, igniter head is corresponding with said gas nozzle, and the flow perturbation device is nested with rotationally on described gas service pipe; And be stretched in the radiant tube, corresponding with described gas nozzle cover.

In a concrete embodiment of the present invention, described one group of heat-exchange tube is collected at together, and the shape of each heat-exchange tube all is n shape.

In another concrete embodiment of the present invention, described thermal air current quantity regulating device comprises adjustment frid, axle of the air door, axle of the air door control stick and air door, and an end of adjustment frid is fixed on described first and takes over; The other end constitutes cantilever end; And offer an adjustment groove, an end of axle of the air door is arranged on said first rotationally and takes over, and is stretched in the described adapter chamber; The other end is connected with the axle of the air door control stick; And the axle of the air door control stick matches with described adjustment groove through setscrew nut, and air door is positioned at described adapter chamber, and fixes with described axle of the air door.

In another concrete embodiment of the present invention; Described flow perturbation device comprises moving casing, spring and eddy flow tray; Spring and moving casing are nested with on described gas service pipe, wherein: an end bearing of spring is on described combustion gas valve seat connector, and the other end is bearing in an end of moving casing; Eddy flow tray is fixed on the other end of moving casing, and corresponding with described gas nozzle cover.

In another concrete embodiment of the present invention, be fixed with one group of nozzle cage feet on the outer wall of said gas nozzle cover, the inwall of each nozzle cage feet and described radiant tube is fixed.

Also have among the concrete embodiment of the present invention, constitute spinning disk on the described eddy flow tray at interval.

more of the present invention and among concrete embodiment, described spinning disk with the radiation morphosis on described eddy flow tray.

In of the present invention and then concrete embodiment, described radiant tube be shaped as W shape or U-shaped.

Technical scheme provided by the invention is owing to done improvement to the structure of combustion-supporting gas preheating mechanism; Heat-exchange tube has been substituted the fin in the prior art; The temperature of combustion air is heated to more than 500 ℃; Both can reduce the useless flue-gas temperature that effluxes and help protecting environment, can practice thrift the used energy of combustion mechanism again.

Description of drawings

Fig. 1 is a concrete example structure figure of radiant tube burner of the present invention.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the application examples sketch map of radiant tube burner shown in Figure 1 of the present invention.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more; The applicant general combines accompanying drawing to elaborate with the mode of embodiment below; But the description to embodiment all is not the restriction to the present invention program, any according to the present invention design done only for pro forma but not substantial equivalent transformation all should be regarded as technical scheme category of the present invention.

Please provide the mounting plate 1 that constitutes radiant tube burner of the present invention referring to Fig. 1 and Fig. 2, this mounting plate 1 obviously is used for body of heater fixing, more properly says, in use, the mounting plate 1 and the opening of the furnace chamber of body of heater is fixed.In order to ensure fixed effect, constitute eaves board 11 in a side of mounting plate 1 (this side under user mode towards body of heater).The shape of radiant tube 2 both can be W shape (also can claim M shape), also can be U-shaped (also can claim n shape), no matter but which kind of shape all has two end points, and one of them end points is the smoke discharging end, and another end points is a heat supply end.For the ease of making public understanding; The applicant is defined as first with the smoke discharging end and connects end; This first connect the end have one first matching seat 21, be used for being fixedly connected with the following combustion air preheating mechanism 3 that also will detail, in like manner aforesaid heat supply end is defined as second and connects end; This second connects end and has one second matching seat, 22, the second matching seats 22 and be used for being connected with the following combustion mechanism that equally also will specify 5.Shown in figure, first, second matching seat 22 all is stretched over a side of mounting plate 1, thereby makes the middle part of the body of radiant tube 2 be positioned at the opposite side of mounting plate 1; When putting into using; The central region of body is positioned at burner hearth, and then can know, first matching seat 21 is essentially an adpting flange; And the spaced apart first adpting flange hole 211 that is provided with on first matching seat 21; In like manner, second matching seat 22 in fact also is an adpting flange, and on second Connection Block 21 the spaced apart second adpting flange hole 221 that is provided with.The radiant tube tube chamber 23 of radiant tube 2 communicates with combustion mechanism 5 with combustion-supporting gas preheating mechanism 3, and wherein: an end that communicates with combustion mechanism 5 is a fire end, and the middle part then is a radiant section, and an end that communicates with combustion air preheating mechanism 3 is the smoke evacuation section.

As the main points of technical scheme of the present invention, the combustion air preheating mechanism 3 that provides has the strong point of the corresponding construction in the remarkable excellent prior art, is embodied in can make more than the extraneous air heat exchange of introducing to 500 ℃.Preferably provided by the invention but not combustion air preheating mechanism 3 that definitely be limited to comprises that smoke discharging housing 31, one group are to gather heat-exchange tube 32, smoke discharging housing holder 33, smoke exhaust pipe 34 and the spacer 35 that state combines; Smoke discharging housing 31 is essentially a three-way body; Because have first, second connect the end the 311,312 and the 3rd connect the end 313; First, second connects the both sides that end lays respectively at smoke discharging housing 31; And both are corresponding substantially; The 3rd connects the end that end 313 then is positioned at smoke discharging housing 31, wherein: first connect end 311 far-end constitute one first mounting flange 3111, and on first mounting flange 3111 the spaced apart first mounting flange hole 31111 that is provided with.According to known general knowledge, first mounting flange 3111 connects with the useless flue gas fairlead that is used for flue gas is discharged.Aforesaid second connects end 312 far-end constitutes one second mounting flange 3121, and one group of first hold-down screw 31211 of these second mounting flange, 3121 usefulness is connected with the following hot-air transition mechanism 4 that also will be described in detail.The aforesaid the 3rd connects end 313 directly constitutes a mounting flange; Connect the 3rd that end is spaced apart on 313 to be provided with one group of second mounting flange hole 3131; Fixing with smoke discharging housing holder 33 with one group of second hold-down screw 31311, smoke discharging housing holder 33 is preferably fixing with the mode and the mounting plate 1 of welding.First matching seat 21 of aforesaid radiant tube 2 connects between end 313 and the smoke discharging housing holder 33 corresponding to the 3rd.Shown in figure; Connect end 313 matched ends at smoke discharging housing holder the 33 and the 3rd and constitute the first holder flange 331; The spaced apart first holder flange hole 3311 that is provided with on the first holder flange 331; The first adpting flange hole 211 and the first holder flange hole, 3311 backs that aforesaid second hold-down screw 31311 penetrates on the second mounting flange hole 3131, first matching seat 21 successively are fixing with the clamp nut 3132 of signal among the figure, connect between the end 313 and first holder flange 331 thereby first matching seat 21 is clamped in second reliably.One group of heat-exchange tube 32 forms and is collected at version together, and its (heat-exchange tube 32) end is presented in the radiant tube tube chamber 23 of radiant tube 2, and the other end then is arranged in the shell chamber of smoke discharging housing 31.Each heat-exchange tube 31 has an air inlet 321 and a gas outlet 322.The spacer 35 of one cylindrical body is arranged in the smoke discharging housing 31, and axial restraint has one piece of demarcation strip 351 in this spacer 35, by this demarcation strip 351 with the cavity volume of spacer 35 by axially being divided into air inlet half chamber 3511 and return-air half chamber 3512.Aforesaid air inlet 321 communicates with air inlet half chamber 3511, and aforesaid gas outlet 322 communicates with return-air half chamber 3512., advance, return-air mouth the 321, the 322nd in above-mentioned explanation and combine Fig. 1 to know by the applicant, respectively be opened in advancing on the spacer 35, return-air hole coincides.Smoke exhaust pipe 34 is positioned at aforesaid first and connects end 311 cavity volume; The outer wall of this smoke exhaust pipe 34 and first connects between end 311 the inwall and is formed with the space; Constitute the first air inlet air flue 342a by this space (also can claim the space); Extraneous air is introduced from this first air inlet air flue 342a, constitutes passage (also can claim the space) between the inwall of the outer wall of the base portion of smoke exhaust pipe 34 and smoke discharging housing 31, becomes the second air inlet air flue 342b by this tunnel-shaped; This second air inlet air flue 342b both communicated with the aforesaid first air inlet air flue 342a, communicated with air inlet half chamber 3511 again.The smoke exhaust pipe tube chamber 341 of aforesaid smoke exhaust pipe 34 communicates with radiant tube tube chamber 23; High-temperature waste flue gas in the radiant tube tube chamber 23 is drawn from discharge flue 343 entering smoke exhaust pipe tube chambers 341 and by useless flue gas fairlead; Meanwhile;, that is to say heat-exchange tube 32 heat exchange by high-temperature flue gas, one group of heat transferred is shaped as the U-shaped heat-exchange tube 32 of (also can claim n shape) by high-temperature waste flue gas; To being incorporated into the combustion air heating in the tube chamber of heat-exchange tube 32 by first, second air inlet air flue 342a, 342b, air inlet half chamber 3511 and air inlet 321 successively; Air after the heating 322 gets into return-airs half chamber 3512 from the gas outlet of heat-exchange tube 32, get in return-air half chamber 3512 high temperature (more than 500 ℃) hot-air through second connect end 312 blow vent 3122 get into second and connect the cavity volume of end 312, and then get into hot-air transition mechanism 4; Both communicated because second connects end 312 cavity volume, communicated with hot-air transition mechanism 4 again with return-air half chamber 3512.Aforesaid discharge flue 343 is formed between the outer wall of inwall and spacer 35 and heat-exchange tube 32 of base portion of smoke exhaust pipe 34.

The air of hot-air transition mechanism 4 after with 3 preheatings of combustion air preheating mechanism flows to combustion mechanism 5; The hot-air transition mechanism 4 that the present invention program recommends comprises first, second adapter 41,42, expansion sleeve 43 and air flow adjusting apparatus 44; Second of the smoke discharging housing 31 of first adapter 41 and aforesaid combustion air preheating mechanism 3 connects end 312 matched ends (right-hand member shown in Figure 1) and constitutes one the 3rd mounting flange 412; Aforesaid second mounting flange 3121 is fixing with the 3rd mounting flange 412 by one group of first hold-down screw 31211; The cavity volume that the adapter chamber 411 and aforesaid second of first adapter 41 connects end 312 communicates; First adapter 41 constitutes one the 4th mounting flange 413 equally with expansion sleeve 43 matched ends (left end shown in Figure 1), is fixedly connected with expansion sleeve 43 with one group of the 3rd hold-down screw 4131.Second takes over 42 one constitutes on the expansion sleeve 43; Second take over 42 with below the combustion mechanism 5 matched ends that also will detail constitute one the 5th mounting flange 421, by one group of the 4th hold-down screw 4211 the 5th mounting flange 421 is fixedly connected with combustion mechanism 5.Expansion sleeve 43 is a bellows; Has the adaptability that changes expanding with heat and contract with cold; That is to say that expansion sleeve 43 has the function of fine adjustment, help to make hot-air transition mechanism 4 and combustion air preheating mechanism 3 and with combustion mechanism 5 between be connected the ultimate attainment embodiment of effect.Air flow adjusting apparatus 44 is located at first and takes on 41; This air flow adjusting apparatus 44 comprises adjustment frid 441, axle of the air door 442, axle of the air door control stick 443 and air door 444; One end of adjustment frid 441 is to weld, to rivet or to be fixed on the outer wall of first adapter 41 with securing member such as screw; The other end constitutes the cantilever end of level, and constitutes a kink at this end, on this kink, offers the adjustment groove 4411 of an arc.Axle of the air door control stick 443 is provided on the adjustment groove 4411 through setscrew nut 4431, and an end of axle of the air door 442 is arranged on first rotationally and takes on 41, and is arranged in adapter chamber 411, and the other end of axle of the air door 442 is connected with axle of the air door control stick 443.Air door 444 is positioned at takes over chamber 411, and fixing with axle of the air door 442.Just can drive air door 444 by axle of the air door 442 through operation (operation up or down) and rotate corresponding angle axle of the air door control stick 443; Use the amount of the combustion air that adjustment introduced by combustion air preheating mechanism 3, so that suitable with the mixing ratio of the gas quantity of combustion mechanism 5.

Emphasis is seen Fig. 1; Combustion mechanism 5 provided by the invention comprises combustion gas valve seat 51, hot-air sleeve pipe 52, hot-air sleeve pipe holder 53, gas service pipe 54, igniter 55, gas nozzle cover 56, gas nozzle 57 and flow perturbation device 58; Combustion gas valve seat 51 has one the 6th mounting flange 514; Be fixedly connected with hot-air sleeve pipe 52 with one group of the 5th hold-down screw 5141; In combustion gas valve seat 51, offer combustion gas air admission hole 511, observe fenestra 512 and igniter hole 513, combustion gas air admission hole 511 is connected with source of the gas such as natural gas storage tank pipeline, observes in the fenestra 512 for example pyroceram eyeglass of the transparent body is set.Hot-air sleeve pipe 52 constitutes one first adapting flange 522 towards an end of combustion gas valve seat 51; This first adapting flange 522 is fixedly connected with the 6th mounting flange 514 by aforesaid the 5th hold-down screw 5141; Hot-air sleeve pipe 52 constitutes one second adapting flange 523 towards an end of hot-air sleeve pipe holder 53; The spaced apart fixing screw hole 5231 that is provided with on this second adapting flange 523; Be fixedly connected with hot-air sleeve pipe holder 53 by one group of the 6th hold-down screw 52311, the fixed form of hot-air sleeve pipe holder 53 and mounting plate 1 is with the description to smoke discharging housing holder 33.Constitute one second holder flange 531 at smoke discharging housing holder 53 towards an end of hot-air sleeve pipe 52, spaced apartly on the second holder flange 531 be provided with one group of second holder flange hole 5311.Second matching seat 22 of aforesaid radiant tube 2 is between second adapting flange 523 and the second holder flange 531; More properly say; After aforesaid one group of the 6th hold-down screw 52311 penetrates fixing screw hole 5231, the second adpting flange hole 221 and the second mounting flange hole 5311 successively, just can second matching seat 22 of radiant tube 2 be fixed, and limit clamp nut 52312.One end of gas service pipe 54 is positioned at the hot-air chamber 521 of hot-air sleeve pipe 52; And has a combustion gas valve seat connector 541 in this end end; Combustion gas valve seat connector 541 is connected with aforesaid combustion gas valve seat 5; And communicate with the passage of combustion gas air admission hole 511, the combustion gas of being introduced by combustion gas air admission hole 511 gets into gas service pipe 54; The other end of gas service pipe 54 is stretched in the radiant tube tube chamber 23 of radiant tube 2.One end of igniter 55 is fixing with the igniter hole 513 on the combustion gas valve seat 51 through igniter holder 552, and the other end of igniter 55 is stretched in the radiant tube tube chamber 23, is furnished with an igniter head 551 at this end.Gas nozzle cover 56 is positioned at radiant tube tube chamber 23, is equipped with one group of nozzle cage feet 562 with the interval state on the outer wall of this gas nozzle cover 56, and each nozzle cage feet 562 is fixed with the inwall of radiant tube tube chamber 23.Gas nozzle 57 is fixed on the gas outlet end of gas service pipe 54; Promptly be fixed on gas service pipe 54 and be stretched over the end end in the radiant tube tube chamber 23; Because the setting of gas nozzle cover 56, thereby make gas nozzle 57 be positioned at the gas nozzle mantle cavity 561 of gas nozzle cover 56.Flow perturbation device 58 movably is located on the gas service pipe 54; This flow perturbation device 58 comprises moving casing 581, spring 582 and eddy flow tray 583; Spring 582 all is nested with on gas service pipe 54 with moving casing 581; Wherein: an end of spring 582 contacts with the end face of aforesaid combustion gas valve seat connector 541, and the other end contacts with the end face of moving casing 581, and eddy flow tray 583 also can be described as cyclone disk or cyclone; Be fixed on the end of moving casing 581; On this eddy flow tray 583, at interval constitute one group of (being illustrated as three) spinning disk 831, the hot-air that enters into hot-air chamber 521 when eddy flow tray 583 by disturbance, thereby the mixed effect of hot-air and combustion gas is improved.

The position placed in the middle of the length direction of aforesaid hot-air sleeve pipe 52 has a hot-air and introduces interface 524; First adapter, the 42 matched ends that this hot-air is introduced interface 524 and aforesaid hot-air transition mechanism 4 constitute one the 7th mounting flange 5241, by aforesaid one group of the 4th hold-down screw 422 the 5th mounting flange 421 are fixedly connected with the 7th mounting flange 5241.When connecting, add sealing ring between aforesaid all flanges.

Ask for an interview Fig. 3; From top to down is provided with the radiant tube burner that three covers are made up of radiant tube 2, combustion air preheating mechanism 3, hot-air transition mechanism 4 and the combustion mechanism 5 of structure shown in Figure 1 on mounting plate 1; Hence one can see that, and structure shown in Figure 1 can be provided with on same piece of mounting plate 1 according to the quantity that needs.In addition, though the radiant tube 2 of signal is a W shape among Fig. 1 and Fig. 2, can be U-shaped fully.Also know product steel band process between neighbouring radiant tube 2 for example of treating radiation heating according to Fig. 3, by 2 pairs of steel band radiation heatings of radiant tube or claim baking.

The applicant combines Fig. 1 to Fig. 3 to describe operation principle of the present invention; Fuel gas such as liquefied gas or natural gas are caused the combustion gas valve seat 51 of combustion mechanism 5 by pipeline; The combustion gas air admission hole 511 interior combustion gas that enter into combustion gas valve seat 51 cause gas nozzle 57 through gas service pipe 54, at this moment, and igniter 55 igniting; Overlap 56 internal combustion at gas nozzle, to radiant tube 2 heating.Meanwhile; The high-temperature waste flue gas that burning produces is drawn by the end with first matching seat 21 of radiant tube 2; Owing to be furnished with combustion air preheating mechanism 3 at this end; Therefore high-temperature waste flue gas is when smoke exhaust pipe 34 is discharged; To heat-exchange tube 32 heating; The outside air (also can claim oxygen) that enters into air inlet half chamber 3511 through first, second air inlet air flue 342a, 342b is heated in the process that the air inlet 321 from heat-exchange tube 32 gets into arrival gas outlet 322, back; It is that high-temperature hot air more than 500 ℃ gets into return-air half chamber 3512 that heated temperatures makes, the high-temperature hot air in return-air half chamber 3512 through blow vent 3122 get into first connect end 312 cavity volume, more successively through first of hot-air transition mechanism 4 take over 41 adapter chamber 411, second take over 42 and hot-air introduce the hot-air chamber 521 that interface 524 gets into hot-air sleeve pipes 52; Under the state of disturbance of the flow-disturbing dish 583 of flow perturbation device 58, in the gas nozzle mantle cavity 561 of entering gas nozzle cover 56, burn with combustion gas mixing.In said process, combustion air preheating mechanism 3 can be to the desirable heating of combustion air, and both can reduce the temperature of outer waste discharge flue gas and helped protecting environment, but energy savings again; Hot-air transition mechanism 4 had both had the adaptability of the good compensation of expanding with heat and contract with cold, and had the adjusting to combustion air again; Combustion mechanism 5 has combustion gas and air mixes the strong point of promoting combustion efficiency.

Claims

1. radiant tube burner; Comprise mounting plate (1), have first matching seat (21) and second matching seat (22) radiant tube (2), take the fixing combustion air preheating mechanism (3) of said first matching seat (21) and mounting plate (1), take said second matching seat (22) and combustion mechanism (5) of with said combustion air preheating mechanism (3) parallel that fix and be connected combustion air preheating mechanism (3) with mounting plate (1) and combustion mechanism (5) between hot-air transition mechanism (4); It is characterized in that: said combustion air preheating mechanism (3) comprises smoke discharging housing (31), one group of heat-exchange tube (32), smoke discharging housing holder (33), smoke exhaust pipe (34) and spacer (35) that respectively has air inlet (321) and gas outlet (322); Smoke discharging housing (31) has first, second and connects end (311,312) and the 3rd and connect end (313); First connects end (311) is used for being connected with useless flue gas fairlead pipeline; Second connects end (312) connects with said hot-air transition mechanism (4); And the 3rd to connect end (313) and smoke discharging housing holder (33) fixing; One end of one group of heat-exchange tube (32) is placed in the radiant tube tube chamber (23) of radiant tube (2); The other end is positioned at the shell chamber of smoke discharging housing (31); Smoke discharging housing holder (33) is fixing with said mounting plate (1); Said first matching seat (21) is fixed on the said the 3rd and connects between end (313) and the smoke discharging housing holder (33); Smoke exhaust pipe (34) be positioned at said first connect end (311) cavity volume, the smoke exhaust pipe tube chamber (341) of this smoke exhaust pipe (34) communicates with the radiant tube tube chamber (23) of described radiant tube (2), the outer wall of smoke exhaust pipe (34) and first connects and constitutes one between the inwall of end (311) and be used to the first air inlet air flue (342a) that supplies outside air to introduce; And constitute the second air inlet air flue (342b) that communicates with the said first air inlet air flue (342a) between the inwall of the outer wall of the base portion of smoke exhaust pipe (34) and said smoke discharging housing (31); Spacer (35) is located in the shell chamber of smoke discharging housing (31), is connected with described one group of heat-exchange tube (32), in the spacer chamber of this spacer (35), axially is installed with a demarcation strip (351); One side of this demarcation strip (351) constitutes air inlet half chamber (3511); Air inlet half chamber (3511) communicates with the said second air inlet air flue (342b), and communicates with the air inlet (321) of said heat-exchange tube (32), and the opposite side of demarcation strip (351) constitutes return-air half chamber (3512); Return-air half chamber (3512) and said second connects end (312) and communicates, and communicates with the gas outlet (322) of said heat-exchange tube (32).

2. radiant tube burner according to claim 1; It is characterized in that described hot-air transition mechanism (4) comprises that having first of adapter chamber (411) takes over (41), second adapter (42), expansion sleeve (43) and the thermal air current quantity regulating device (44); One end of first adapter (41) and an end of expansion sleeve (43) are tightly connected; The other end and described second of first adapter (41) connects end (312) and is tightly connected; And the cavity volume that the adapter chamber and second of first adapter (41) connects end (312) communicates, and second takes over the other end that (42) are formed in expansion sleeve (43), and is tightly connected with described combustion mechanism (5); Expansion sleeve (43) is a corrugated nozzle, and thermal air current quantity regulating device (44) is arranged on described first and takes on (41).

3. radiant tube burner according to claim 1; It is characterized in that described combustion mechanism (5) comprises combustion gas valve seat (51), have first, second adapting flange (522,523) and hot-air introduced interface (524) hot-air sleeve pipe (52), hot-air sleeve pipe holder (53), gas service pipe (54), igniter (55), gas nozzle cover (56), gas nozzle (57) and flow perturbation device (58); Combustion gas valve seat (51) is fixedly connected with first adapting flange (522) of hot-air sleeve pipe (52); And communicate with the hot-air chamber (521) of hot-air sleeve pipe (52), second adapting flange (523) of hot-air sleeve pipe (52) is fixing with hot-air sleeve pipe holder (53), and hot-air sleeve pipe holder (53) is fixing with said mounting plate (1); Described second matching seat (22) is fixed between second adapting flange (523) and the hot-air sleeve pipe holder (53); Said hot-air is introduced interface (524) and is extended on the wall body of warm-air pipe (52), connects with described hot-air transition mechanism (4), and gas service pipe (54) is positioned at said hot-air chamber (521); One end of this gas service pipe (54) constitutes a combustion gas valve seat connector (541); This combustion gas valve seat connector (541) and said combustion gas valve seat (51) are fixing and communicate with combustion gas air admission hole (511) on the combustion gas valve seat (51), and the other end of gas service pipe (54) reaches in the described radiant tube (2), and at the fixing described gas nozzle (57) of this end; Gas nozzle cover (56) is fixed in the radiant tube (2); Described gas nozzle (57) is positioned at gas nozzle cover (56), and igniter (55) is positioned at said hot-air chamber (521), and an end and said combustion gas valve seat (51) are fixing; The other end is stretched in the radiant tube (2); And be equipped with igniter head (551), igniter head (551) is corresponding with said gas nozzle (57), and flow perturbation device (58) is nested with rotationally on described gas service pipe (54); And be stretched in the radiant tube (2), corresponding with described gas nozzle cover (56).

4. radiant tube burner according to claim 1 it is characterized in that described one group of heat-exchange tube (32) is collected at together, and the shape of each heat-exchange tube (32) all is n shape.

5. radiant tube burner according to claim 2; It is characterized in that described thermal air current quantity regulating device (44) comprises adjustment frid (441), axle of the air door (442), axle of the air door control stick (443) and air door (444); One end of adjustment frid (441) is fixed on described first and takes on (41), and the other end constitutes cantilever end, and offers an adjustment groove (4411); One end of axle of the air door (442) is arranged on said first rotationally and takes on (41); And be stretched in the described adapter chamber (411), the other end is connected with axle of the air door control stick (443), and axle of the air door control stick (443) matches with described adjustment groove (4411) through setscrew nut (4431); Air door (444) is positioned at described adapter chamber (411), and fixing with described axle of the air door (442).

6. radiant tube burner according to claim 3; It is characterized in that described flow perturbation device (58) comprises moving casing (581), spring (582) and eddy flow tray (583); Spring (582) and moving casing (581) are nested with on described gas service pipe (54); Wherein: an end bearing of spring (582) is on described combustion gas valve seat connector (541); And the other end is bearing in an end of moving casing (581), and eddy flow tray (583) is fixed on the other end of moving casing (581), and corresponding with described gas nozzle cover (56).

7. radiant tube burner according to claim 3 is characterized in that being fixed with one group of nozzle cage feet (562) on the outer wall of said gas nozzle cover (56), and each nozzle cage feet (562) is fixed with the inwall of described radiant tube (2).

8. radiant tube burner according to claim 6 is characterized in that described eddy flow tray (583) upward constitutes spinning disk (5831) at interval.

9. radiant tube burner according to claim 8, it is characterized in that described spinning disk (5831) with the radiation morphosis on described eddy flow tray (583).

10. according to claim 1 or 3 or 7 described radiant tube burners, what it is characterized in that described radiant tube (2) is shaped as W shape or U-shaped.