CN207247204U - A kind of radiation tube heater - Google Patents
A kind of radiation tube heater Download PDFInfo
- Publication number
- CN207247204U CN207247204U CN201721312981.9U CN201721312981U CN207247204U CN 207247204 U CN207247204 U CN 207247204U CN 201721312981 U CN201721312981 U CN 201721312981U CN 207247204 U CN207247204 U CN 207247204U
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- end socket
- combustion chamber
- burner
- tube
- central tube
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Abstract
It the utility model is related to a kind of radiation tube heater, including burner 1 and double-P type radiant tube 2, the double-P type radiant tube includes central tube, two side pipes, three-way pipe, four-way pipes, the central tube is connected with one end of two side pipes by three-way pipe, three interfaces of the four-way pipe connect the other end of central tube and two side pipes respectively, remain an interface and connect the burner；The emission direction of the burner and central tube are coaxial；The burner includes Gas Pipe, end socket and combustion chamber；The combustion chamber is respectively provided with throat structure with end socket, and the end socket is located at the burner port of export；Combustion chamber is passed through from the centre of end socket, is stitched between outer surface and the throat structure of end socket formed with a ring, and the throat structure of combustion chamber and the throat structure of end socket combine to form two-stage guiding.The present apparatus is being realized in the high-power burner of configuration, while cost of investment is greatly reduced, also can effectively be reduced radiation combustion inner pipe temperature, be improved tube wall temperature uniformity, and realize low NOx drainage.
Description
Technical field
The utility model belongs to burner arts, is related to a kind of radiation tube heater.
Background technology
Radiation tube heater has relatively broad application in non-oxidation Field of Heat-treatment, wherein widely used
There are straight connector formula radiant tube and W type radiant tubes.Since heat treatment process requires height to temperature accuracy, straight connector is radiant tube and W
Type radiation tube heater uses pulse burning control technique mostly, and each heating unit has supporting combustion controller, fire defector
A series of auxiliary devices such as device, automatic stop valve, hand-operated valve；And straight connector formula radiant tube is limited be subject to swept area, W type spokes
Penetrate pipe to be limited be subject to head and the tail temperature uniformity requirement, provisioned burner power is unsuitable excessive, and a heat-treatment furnace needs to match somebody with somebody
The burner and auxiliary device of substantial amounts are put, cost of investment is very high.
Using double-P type radiant tube, burner power can be increased on the premise of certain swept area is ensured, so as to fulfill
Burner and auxiliary device quantity are reduced, reduces the purpose of input.But, it is necessary to control in the practical operation after burner power increase
The NOx emission index of system radiation combustion inner pipe, while also to ensure radiant tube tube wall temperature uniformity, prevent that local temperature is excessive
Influence thermal treatment quality or directly result in radiant tube deformation, burn；Solving problem above still has certain technical difficulty.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of radiation tube heater, realize high-power in configuration
Burner, while cost of investment is greatly reduced, also can effectively reduce radiation combustion inner pipe temperature, improve tube wall temperature uniformity,
And realize low NOx drainage.
To reach above-mentioned purpose, the utility model provides following technical solution：
A kind of radiation tube heater, including burner 1 and double-P type radiant tube 2, the double-P type radiant tube include central tube,
Two side pipes, three-way pipe, four-way pipes, the central tube are connected with one end of two side pipes by three-way pipe, the four-way pipe
Three interfaces connect the other end of central tube and two side pipes respectively, remain an interface and connect the burner；The spray of the burner
Outgoing direction is coaxial with central tube；The burner includes Gas Pipe, end socket and combustion chamber；The combustion chamber is respectively provided with necking with end socket
Structure, the end socket are located at the burner port of export；Combustion chamber is passed through from the centre of end socket, between outer surface and the throat structure of end socket
Stitched formed with a ring, a combustion air part flows into double-P type radiant tube from circumferential weld, and another part enters combustion chamber in combustion chamber
After participating in reaction double-P type radiant tube is being flowed into from combustion chamber；The throat structure of combustion chamber and the throat structure of end socket combine to be formed
Two-stage is oriented to.
Further, the trunnion axis of the end socket, central tube and four-way pipe is coaxial that the end socket is erected across four-way pipe
Straight axis.
Further, the necking angle of the combustion chamber is A1；The scope of the necking angle A 2 of end socket is A1~120 °, its
In, the scope of A1 is 60 °~90 °.
Further, partition is disposed with the circumferential weld, the quantity of partition is no less than 2, is distributed in circumferential weld.
Further, separate part sectional area account for whole circumferential weld sectional area ratio be 1/4~2/3.
Further, a diameter of D1 of the central tube, a diameter of D2, D2=0.7~0.9D1 of side pipe.
Further, the combustion chamber includes entrance, interlude, the outlet section set gradually, and the interlude is necking
Structure.
Further, the entrance, outlet section are straight section.
The beneficial effects of the utility model are：A kind of radiation tube heater of the utility model is in supporting high-power burning
While mouth, flue gas self-loopa multiplying power can be effectively improved and reduce partial combustion intensity, effectively control localized hyperthermia and radiation
Tube wall temperature uniformity, it is ensured that heating quality, reduces NOx emission.
Brief description of the drawings
In order to make the purpose of this utility model, technical solution and beneficial effect clearer, the utility model provides as follows
Attached drawing illustrates：
Fig. 1 is a kind of radiation tube heater structure diagram of the utility model；
Fig. 2 is various gas flow schematic diagrams；
Fig. 3 is the sectional view along M-M of Fig. 2.
Embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
A kind of radiation tube heater as shown in Figure 1, including burner 1 and double-P type radiant tube 2, burner 1 use self-preheating
Formula high combustion rate burner, the double-P type radiant tube includes central tube 2-1, two side pipe 2-2, three-way pipe 2-3, four-way pipe 2-4, described
Central tube 2-1 is connected with one end of two side pipe 2-2 by three-way pipe 2-3, and three interfaces of the four-way pipe 2-4 connect respectively
The other end of central tube 2-1 and two side pipe 2-2, remain an interface and connect the burner 1；The emission direction of the burner 1 with
Central tube 2-1 is coaxial；The burner 1 includes Gas Pipe 1-5, end socket 1-1 and combustion chamber 1-2；The combustion chamber 1-2 and end socket 1-
1 is respectively provided with throat structure, and the end socket 1-1 is located at 1 port of export of burner；Combustion chamber 1-2 is passed through from the centre of end socket 1-1, appearance
1-4 is stitched formed with a ring between the throat structure of face and end socket 1-1, a combustion air part flows into double-P type spoke from circumferential weld 1-4
Pipe 2 is penetrated, another part enters combustion chamber 1-2 and flowing into double-P type radiant tube from combustion chamber 1-2 after combustion chamber 1-2 participates in reaction
2.The throat structure of combustion chamber 1-2 and the throat structure of end socket 1-1 combine to form two-stage guiding.
In the present embodiment, the burner end socket 1-1, central tube 2-1, the burner interface of four-way pipe 2-4 are coaxial.End socket 1-1
Across the vertical axis of four-way pipe 2-4.It is parallel with central tube 2-1 for horizontal axis in Fig. 1, by four-way pipe 2-4 centers,
The vertical axis for four-way pipe 2-4 vertical with horizontal axis, end socket 1-1 just cross over the vertical axis of four-way pipe 2-4, can be with
Ensure good injection power, guiding flue gas effect is good.If end socket 1-1 is too rearward, nozzle front space is too big, momentum loss
Greatly, the guiding function of jet-stream wind is deteriorated；Too forward, smoke backflow area circulation area ratio is small, and the exhaust gas volumn of guiding is also limited.
Preferably, the necking angle of the combustion chamber 1-2 is A1；The scope of the necking angle A 2 of end socket for A1~
120 °, wherein, the scope of A1 is 60 °~90 °.The combustion chamber 1-2 includes entrance, interlude, the outlet section set gradually,
The interlude is throat structure, and entrance, outlet section are straight section.
As further improvement of this embodiment, partition 1-3 is disposed with the circumferential weld 1-4, the quantity for separating 1-3 is many
In 2, it is distributed in circumferential weld 1-4.Preferably, the ratio that the sectional area of partition part accounts for whole circumferential weld 1-4 sectional areas is 1/4
~2/3.
Preferably, a diameter of D1 of the central tube 2-1, a diameter of D2, D2=0.7~0.9D1 of side pipe 2-2.
Under working status, portion of air enters after combustion chamber 1-2 participates in combustion reaction and is entering double-P type radiant tube 2, separately
Portion of air is directly entered double-P type radiant tube 2 from circumferential weld 1-4, and combustion reaction is continued to participate in double-P type radiant tube 2, realizes
Researched of Air Staging Combustion Burning Pulverized Coal；In combustion chamber and fuel a degree of combustion reaction occurs for air, forms high-temperature gas, and in combustion chamber
1-2 neckings effect is lower to be sprayed at a high speed, while forms stronger back pressure so that also higher flow velocity sprays into air from circumferential weld 1-4
Double-P type radiant tube 2；A part of cigarette self-preheating burner discharge of combustion product gases in double-P type radiant tube 2, another part is then in height
The circulation in double-P type radiant tube 2 under the action of fast jet-stream wind.
The throat structure of combustion chamber 1-2 and the throat structure of end socket 1-1 combine to form two-stage guiding, and guiding flue gas is in double P
Circulation in type radiant tube 2.The primary cycle of the throat structure guiding flue gas of end socket 1-1, in the spray of circumferential weld 1-4 high-speed air flows
Penetrate under effect, flue gas flows back to form primary cycle close to end socket 1-1 outer walls, and primary cycle flue gas is mixed with circumferential weld 1-4 air, greatly
Width reduces oxygen concentration, realizes the low oxygen combustion of the second level；The throat structure guiding flue gas secondary cycle of combustion chamber 1-2, is firing
Under the jet-action for burning room 1-2 outlets high-speed flow, outer wall of the flue gas close to combustion chamber 1-2 neckings part, which flows back, to be formed two level and follows
Ring, secondary cycle flue gas follow the high-speed flow of the outlet of combustion chamber 1-2 together flow forward, increase gas flow, can be with
Reduce the ignition temperature of single-stage combustion and control localized hyperthermia, improve temperature uniformity, can also further reduce and be sprayed from burning
The concentration of the unfinished reacting gas gone out, reduces the intensity of second level burning, plays and elongates flame and improve temperature uniformity
Purpose.Self-loopa of the flue gas in radiant tube, greatly improves actual motion flue gas flow, advantageously reduces heating unit and is heating
During flue gas overall temperature drop amplitude, advantageously reduce the temperature difference of central tube 2-1 and side pipe 2-2, improve radiant tube heating dress
The uniformity of overall heat flow density and the temperature control precision of heating region put.
Finally illustrate, preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, in the form and details can make it various changes, without departing from the utility model claims book institute
The scope of restriction.
Claims (8)
1. a kind of radiation tube heater, including burner 1 and double-P type radiant tube 2, it is characterised in that：The double-P type radiant tube bag
Central tube, two side pipes, three-way pipe, four-way pipes are included, the central tube is connected with one end of two side pipes by three-way pipe, described
Three interfaces of four-way pipe connect the other end of central tube and two side pipes respectively, remain an interface and connect the burner；It is described
The emission direction of burner and central tube are coaxial；The burner includes Gas Pipe, end socket and combustion chamber；The combustion chamber and end socket are equal
With throat structure, the end socket is located at the burner port of export；Combustion chamber is passed through from the centre of end socket, the necking of outer surface and end socket
Stitched between structure formed with a ring, a combustion air part flows into double-P type radiant tube from circumferential weld, and another part enters combustion chamber
After participating in reaction in combustion chamber double-P type radiant tube is being flowed into from combustion chamber；The throat structure of combustion chamber and the throat structure of end socket
Combination forms two-stage guiding.
2. radiation tube heater according to claim 1, it is characterised in that：The end socket, central tube and four-way pipe
Trunnion axis be it is coaxial, the end socket cross over four-way pipe vertical axis.
3. radiation tube heater according to claim 1, it is characterised in that：The necking angle of the combustion chamber is A1；
The scope of the necking angle A 2 of end socket is A1~120 °, wherein, the scope of A1 is 60 °~90 °.
4. radiation tube heater according to claim 1, it is characterised in that：Partition is disposed with the circumferential weld, is separated
Quantity be no less than 2, be distributed in circumferential weld.
5. radiation tube heater according to claim 4, it is characterised in that：The sectional area of partition part accounts for whole circumferential weld
The ratio of sectional area is 1/4~2/3.
6. radiation tube heater according to claim 1, it is characterised in that：The a diameter of D1, Bian Guan of the central tube
A diameter of D2, D2=0.7~0.9D1.
7. radiation tube heater according to claim 1, it is characterised in that：What the combustion chamber included setting gradually enters
Mouth section, interlude, outlet section, the interlude is throat structure.
8. radiation tube heater according to claim 7, it is characterised in that：The entrance, outlet section are straight section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721312981.9U CN207247204U (en) | 2017-10-12 | 2017-10-12 | A kind of radiation tube heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721312981.9U CN207247204U (en) | 2017-10-12 | 2017-10-12 | A kind of radiation tube heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207247204U true CN207247204U (en) | 2018-04-17 |
Family
ID=61891101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721312981.9U Active CN207247204U (en) | 2017-10-12 | 2017-10-12 | A kind of radiation tube heater |
Country Status (1)
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| CN (1) | CN207247204U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654495A (en) * | 2017-10-12 | 2019-04-19 | 重庆赛迪热工环保工程技术有限公司 | A kind of radiation tube heater |
-
2017
- 2017-10-12 CN CN201721312981.9U patent/CN207247204U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654495A (en) * | 2017-10-12 | 2019-04-19 | 重庆赛迪热工环保工程技术有限公司 | A kind of radiation tube heater |
| CN109654495B (en) * | 2017-10-12 | 2024-01-23 | 重庆赛迪热工环保工程技术有限公司 | Radiant tube heating device |
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