CN109237466A - A kind of triplet furnace core with smoke backflow - Google Patents
A kind of triplet furnace core with smoke backflow Download PDFInfo
- Publication number
- CN109237466A CN109237466A CN201810762502.6A CN201810762502A CN109237466A CN 109237466 A CN109237466 A CN 109237466A CN 201810762502 A CN201810762502 A CN 201810762502A CN 109237466 A CN109237466 A CN 109237466A
- Authority
- CN
- China
- Prior art keywords
- smoke
- combustion chamber
- flue gas
- triplet
- furnace core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
Abstract
The present invention relates to a kind of triplet furnace core with smoke backflow, including combustion chamber, heat exchanger tube, the first collection smoke box, the second collection smoke box, smoke reflux device.Pass through smoke reflux device, being several times as much as the smoke backflow of raw flue gas amount into burner hearth, flue gas initial temperature is reduced to 750 DEG C or so from 1950 DEG C, furnace exit temperature is at 700 DEG C or less, the service life of furnace core can be extended, increasing exhaust gas volumn accelerates flue gas flow rate in heat exchanger tube, and flow velocity quickening can be such that heat exchange enhances, and improves heat exchange efficiency.
Description
Technical field
The present invention relates to the common drying equipment field of paint industry more particularly to a kind of triplet furnaces with smoke backflow
Core.
Background technique
Such as Fig. 1, traditional triplet furnace core, fuel is burnt by burner 801 in burning, and the flue gas of generation passes through collection cigarette
Case 802 enters heat exchanger tube 803, by heat convection, transfers heat to 803 inner wall of heat exchanger tube and conducts to pipe outer wall, drying
The circulation air of room skims over heat exchange pipe outer wall, siphons away thermal temperature by heat convection with heat exchange pipe outer wall and increases, to drying room
Workpiece is heated.Outdoor is discharged by chimney 804 in flue gas.It can be burnt simultaneously according to drying room heat demand amount proportion adjustment
Device 801, to guarantee the stabilization of drying room temperature.Flame situation can be observed by flame-observing hole 805 in burning, wherein triplet
Arrow inside furnace core represents the flow direction of flue gas.
About 1950 DEG C of the adiabatic combustion temperature of natural gas, combustor about exists in busy hour flue gas temperature of hearth outlet
900 DEG C, burner hearth wall surface mean temperature works long hours about at 800 DEG C, and the requirement to burner hearth material is very high, even if using
06Cr25N i20 material, for a long time under 800 DEG C of high temperature and aerobic environment, the service life also be will be greatly reduced.
Summary of the invention
It is an object of the present invention to realize in place of solving the above deficiencies in the existing technologies flue gas initial temperature
750 DEG C or so are reduced to from 1950 DEG C, furnace exit temperature is at 700 DEG C or less.
To achieve the above object, the present invention provides a kind of triplet furnace core with smoke backflow, including combustion chamber, heat exchange
Pipe, the first collection smoke box, the second collection smoke box, smoke reflux device；The rear end of heat exchanger tube is located at collection smoke box connection burning by first
The rear end of room, the front end of heat exchanger tube connect the rear end of smoke reflux device, the left end of smoke reflux device by the second collection smoke box
The front end of combustion chamber is connected, the flue gas that combustion chamber generates is transmitted to heat exchanger tube, the partial fume of heat exchanger tube by the first collection smoke box
Combustion chamber is flowed back by smoke reflux device.
Preferably, smoke reflux device includes that flue gas blows chamber and smoke extraction chamber；Flue gas blows chamber connection the second collection smoke box, cigarette
Air-blowing send it is intracavitary be provided with smoke backflow blower, by from second collection smoke box flue gas be blown into smoke extraction chamber；Smoke extraction chamber is provided with
First control switch, the first control switch, smoke outlet and time mouth return mouth and connect combustion chamber, and the first control switch is for controlling
System row is used for exhaust gas volumn of the row of control to exhaust outlet to the exhaust gas volumn for returning mouth, the second control switch.
Preferably, temperature measuring equipment is additionally provided on combustion chamber, temperature measuring equipment is for measuring flue gas initial temperature.
Preferably, it is additionally provided with sight burner on combustion chamber, sees burner for observing the indoor flame conditions that burn.
Preferably, the front end of combustion chamber is connected with burner.
The present invention is by circulating fan, being several times as much as the smoke backflow of raw flue gas amount into burner hearth, flue gas is initially warm
Degree is reduced to 750 DEG C or so from 1950 DEG C, and furnace exit temperature hereinafter, can extend the service life of furnace core, is increased at 700 DEG C
Exhaust gas volumn accelerates flue gas flow rate in heat exchanger tube, and flow velocity quickening can be such that heat exchange enhances, and improves heat exchange efficiency.
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of traditional triplet furnace core；
Fig. 2 is a kind of triplet furnace core schematic perspective view with smoke backflow provided in an embodiment of the present invention；
Fig. 3 is a kind of top view of the triplet furnace core with smoke backflow provided in an embodiment of the present invention；
Fig. 4 is a kind of triplet furnace core operation principle schematic diagram with smoke backflow provided in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, technical scheme of the present invention will be described in further detail.
Such as Fig. 2 and Fig. 3, a kind of triplet furnace core with smoke backflow provided in an embodiment of the present invention, including combustion chamber 1,
Heat exchanger tube 3, the first collection smoke box 2, the second collection smoke box 4 and smoke reflux device, wherein the rear end of heat exchanger tube 3 is located at by first
Collecting the rear end that smoke box 2 connects combustion chamber 1, the front end of heat exchanger tube 3 connects the rear end of smoke reflux device by the second collection smoke box 4,
The front end of the left end connection combustion chamber 1 of smoke reflux device, the flue gas that combustion chamber 1 generates are transmitted to by the first collection smoke box 2 and are changed
The partial fume of heat pipe 3, heat exchanger tube 3 flows back into combustion chamber 1 by smoke reflux device.
In one example, smoke reflux device includes that flue gas blows chamber 5 and smoke extraction chamber 6；Flue gas blows the connection of chamber 5 second
Collect smoke box 4, flue gas, which blows, is provided with smoke backflow blower 51 in chamber 4, the flue gas from the second collection smoke box 4 is blown into smoke extraction chamber
6；Smoke extraction chamber 6 is provided with back mouth 61, smoke outlet 62, the first control switch 63 and the second control switch 64, returns mouth 61 and connects
Combustion chamber 1, the first control switch 63 for control row to return mouth 61 exhaust gas volumn, the second control switch 64 for control arrange to
Return the exhaust gas volumn of mouth 62.
In one example, temperature measuring equipment 14 is additionally provided on combustion chamber 1, temperature measuring equipment 14 is initially warm for measuring flue gas
Degree.
In one example, it is additionally provided on combustion chamber 1 and sees burner 13, it is indoor for observing the burning to see burner 13
Flame conditions.
In one example, the front end of combustion chamber 1, which is provided with, connects burner opening 12, for being connected with burner, burner
Flame is inputted to combustion chamber 1.
In one example, pressure relief opening 11, gas leakage to combustion chamber or the unsuccessful combustion of igniting are additionally provided on combustion chamber 1
Gas enters combustion chamber, and when purging unclean, when igniting, in combustion chamber may detonation, pressure moment becomes larger, and pressure relief opening 11 is used
Carry out pressure release to protect combustion chamber.
In one example, the inside of combustion chamber 1 is provided with isolation chamber 15 close to one end of burner, which can be with
By flame and it is back to the smoke gas isolating come, prevents flue gas from influencing the burning of flame.
If the curved arrow in Fig. 4 shows the flow trace of flue gas, the flue gas that combustion chamber 1 generates is by the first collection cigarette
Case 2, flow to heat exchanger tube 3 and the second collection smoke box 4 transfers heat to 3 inner wall of heat exchanger tube and conduct extremely by heat convection
Pipe outer wall, the circulation air of drying room skim over heat exchange pipe outer wall, siphon away thermal temperature liter by heat convection with heat exchange pipe outer wall
Height heats drying room workpiece.Flue gas from heat exchanger tube 3 is blown to row by the smoke backflow blower 51 of smoke reflux device
Smoke chamber 6 controls the exhaust gas volumn for flowing back into combustion chamber 1 by the first control switch 63 in smoke extraction chamber 6.
By circulating fan, being several times as much as the smoke backflow of raw flue gas amount into burner hearth, and the temperature of the flue gas to flow back
About 250 DEG C, flue gas initial temperature is reduced to 750 DEG C or so from 1950 DEG C, furnace exit temperature is at 700 DEG C hereinafter, burner hearth
Wall surface mean temperature is about 400 DEG C, is substantially reduced compared with conventional furnace core temperature is not added, therefore can extend the service life of furnace core.
Meanwhile although temperature reduces, the flue gas of reflux also contains great heat, and a part for flowing back into burner hearth as heat source is changed together
Circulated air outside heat pipe exchanges heat；Accelerate flue gas flow rate in heat exchanger tube moreover, increasing exhaust gas volumn, flow velocity quickening can make
Heat exchange enhancing, improves heat exchange efficiency.The thermal efficiency of traditional triplet furnace core is generally 85% or so, and smoke backflow triplet
The heat exchange efficiency of furnace core is by calculating, and in the practical application at several project scenes, the thermal efficiency is more than 88%.
Above specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Illustrate, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (5)
1. a kind of triplet furnace core with smoke backflow, which is characterized in that including combustion chamber, heat exchanger tube, the first collection smoke box, second
Collect smoke box, smoke reflux device；
The rear end of the heat exchanger tube is located at collection smoke box by described first and connects the rear end of the combustion chamber, before the heat exchanger tube
End connects the rear end of the smoke reflux device by the second collection smoke box, described in the left end of the smoke reflux device connects
The front end of combustion chamber, the flue gas that the combustion chamber generates are transmitted to the heat exchanger tube, the heat exchange by the first collection smoke box
The partial fume of pipe flows back into the combustion chamber by the smoke reflux device.
2. triplet furnace core according to claim 1, which is characterized in that the smoke reflux device includes that flue gas blows chamber
And smoke extraction chamber；
The flue gas blows chamber connection the second collection smoke box, the flue gas blow it is intracavitary be provided with smoke backflow blower, in the future
The smoke extraction chamber is blown into from the flue gas of the second collection smoke box；
The smoke extraction chamber is provided with the first control switch, the first control switch, smoke outlet and returns mouth, and described time mouth connects institute
Combustion chamber is stated, first control switch is used for exhaust gas volumn of the row of control to described time mouth, and second control switch is used for
Exhaust gas volumn of the control row to the exhaust outlet.
3. triplet furnace core according to claim 1, which is characterized in that it is additionally provided with temperature measuring equipment on the combustion chamber,
The temperature measuring equipment is for measuring flue gas initial temperature.
4. triplet furnace core according to claim 1, which is characterized in that be additionally provided with sight burner, institute on the combustion chamber
It states and sees burner for observing the indoor flame conditions of burning.
5. triplet furnace core according to claim 1, which is characterized in that the front end of the combustion chamber is connected with burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810762502.6A CN109237466A (en) | 2018-07-12 | 2018-07-12 | A kind of triplet furnace core with smoke backflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810762502.6A CN109237466A (en) | 2018-07-12 | 2018-07-12 | A kind of triplet furnace core with smoke backflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109237466A true CN109237466A (en) | 2019-01-18 |
Family
ID=65072548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810762502.6A Pending CN109237466A (en) | 2018-07-12 | 2018-07-12 | A kind of triplet furnace core with smoke backflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109237466A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369396A (en) * | 2008-09-26 | 2012-03-07 | 气体产品与化学公司 | Process temperature control in oxy/fuel combustion system |
| CN102636037A (en) * | 2011-02-09 | 2012-08-15 | 中外炉工业株式会社 | Energy recovery device |
| CN204943454U (en) * | 2015-07-02 | 2016-01-06 | 山东建筑大学 | The flue gas waste heat recovery of natural gas oxygen-enriched combustion furnace and recirculation thermoregulating system |
| CN106679184A (en) * | 2017-02-27 | 2017-05-17 | 广东万家乐燃气具有限公司 | Smoke-recyclable gas instantaneous water heater |
-
2018
- 2018-07-12 CN CN201810762502.6A patent/CN109237466A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369396A (en) * | 2008-09-26 | 2012-03-07 | 气体产品与化学公司 | Process temperature control in oxy/fuel combustion system |
| CN102636037A (en) * | 2011-02-09 | 2012-08-15 | 中外炉工业株式会社 | Energy recovery device |
| CN204943454U (en) * | 2015-07-02 | 2016-01-06 | 山东建筑大学 | The flue gas waste heat recovery of natural gas oxygen-enriched combustion furnace and recirculation thermoregulating system |
| CN106679184A (en) * | 2017-02-27 | 2017-05-17 | 广东万家乐燃气具有限公司 | Smoke-recyclable gas instantaneous water heater |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |