CN205373424U - Industrial furnace waste heat recovery system - Google Patents
Industrial furnace waste heat recovery system Download PDFInfo
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- CN205373424U CN205373424U CN201620042128.9U CN201620042128U CN205373424U CN 205373424 U CN205373424 U CN 205373424U CN 201620042128 U CN201620042128 U CN 201620042128U CN 205373424 U CN205373424 U CN 205373424U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model provides an industrial furnace waste heat recovery system. The system includes: industrial furnace body (1), industry boiler burner (11), high temperature draught fan (2), wherein, industrial furnace body (1) with industry combustor (11) series connection, burning furnace body exhaust part high temperature flue gas quilt is fired in industry introduce high temperature draught fan (2) in industry boiler burner (11). The utility model discloses a set up the high temperature draught fan, utilize the high temperature draught fan with partial high temperature flue gas and air mixing to reduce the oxygen content in the mist, make the mist get into fuel charge in the industry boiler burner again, make it be in burning oxygendeficient state under, thus nitrogen oxide's (NOX) effluent concentration among the reduction combustion processes.
Description
Technical field
This utility model relates to Industrial Stoves high-temperature flue gas waste heat recovery field, is specifically related to a kind of Waste heat recycling system of industrial furnaces.
Background technology
Current China atmospheric environment situation is very severe, and economic development is increasingly sharp-pointed with the contradiction of resource environment, people's environmental pollution strong reaction.Regional air heavily contaminated phenomenon is on the rise, and the frequency occurred is increasing, has a strong impact on and restrict socioeconomic sustainable development, and the threat people's is healthy.In the face of so severe Environmental Protection Situation, national environmental protection portion issued, in 2012, " key area prevention and control of air pollution " the 12 " planning " given an written reply through State Council, and by nitrogen oxides (hereinafter referred to as NOX) incorporate total amount reduction of discharging system as new performance assessment criteria.
NOXIt it is the general designation of all nitrogen oxides.The NO produced in combustion processXAs one of petrochemical heating furnace major pollutants discharged, its mechanism of production and hazardness are progressively recognized by the mankind.NOX(typically refer to NO2) hazardness mainly damage the deep respiratory tract of people, severe one can cause necropneumonia；NOXMucosa, nervous system and hemopoietic system all there is infringement；Suck higher concentration NOXPossibly even cause suffocating and dying.
In prior art, generally in combustion with burning after the two stage take measures to reduce the NO of heating furnaceXDischarge value.
Reduce NO in combustionXMajor measure be adopt low NOXBurner, so-called low NOXBurner is exactly increase the optimization means such as air classification, fuel staging and flue gas recirculation on the basis of original conventional burners, slows down the severe degree in combustion process, reduces the temperature of flame high-temperature region, reduces NOXGrowing amount, thus reducing NOXThe purpose of discharge.
Reduce NO after combustionXMajor measure be adopt SCR (the selective catalytic denitrification process) or SNCR (selective non-catalytic denitration) method.SCR method is invented in the 1950's by Engelhard company of the U.S. and is applied for a patent, and realizes industrialization in 20 century 70s, is worldwide widely used and develops rapidly afterwards.SCR method is to spray into ammonia (NH in the flue gas of catalyst upstream3) or other suitable reducing agents, utilize catalyst by the NO in flue gasXIt is converted into nitrogen (N2) and water (H2O) a technology.SNCR method is to spray into NH in flue gas stream continuously3Or carbamide makes NO when high temperature on-catalyticXIt is transformed into nitrogen (N2) and water (H2O) technique.
But low NO as aboveXBurner method, SCR method and SNCR method equipment cost in implementation process is all higher, the industrial furnace especially Some Domestic built up, and carries out reducing NO according to above-mentioned three kinds of methodsXDischarge transformation needs the content related to all sufficiently complex, and the transformation cycle is long, and must carry out under shutdown conditions, therefore many industrial furnaces do not possess transformation condition.Therefore, design one can carry out under non-shutdown conditions, and reforming content is simple, and the cycle is short, the reduction NO that cost is lowXResidual neat recovering system and Application way just seem there is very much engineering significance.
Utility model content
For solving the above-mentioned problems in the prior art, the utility model proposes a kind of Waste heat recycling system of industrial furnaces.
The utility model proposes a kind of Waste heat recycling system of industrial furnaces, described system includes: industrial furnace body；Industrial furnace burner；High temperature draught fan；Wherein, described industrial furnace body and described industrial furnace burner are connected in series, and the part high-temperature flue gas that described industrial furnace body is discharged is introduced in described industrial furnace burner by described high temperature draught fan.
Alternatively, described system can also include: air inlet scoop, and described air inlet scoop can introduce air in described industrial furnace burner.
Alternatively, described system can also include: air-blaster, and the air from described air inlet scoop can be introduced in described industrial furnace burner by described air-blaster.
Alternatively, described system can also include: self-discharging chimney, and the partial fume that described industrial furnace body is discharged can be discharged by described self-discharging chimney.
Alternatively, described system can also include: high-temperature flue gas air-introduced machine, and the partial fume that described industrial furnace body is discharged can enter described self-discharging chimney after passing through described high-temperature flue gas air-introduced machine.
Alternatively, described system can also include: air preheater, and air is introduced in described industrial furnace burner after described air preheater preheats；The part high-temperature flue gas that described industrial furnace body is discharged can be discharged after described air preheater cools down.
Alternatively, described system can also include: the first measuring instrument, it is possible to monitoring enters the oxygen content in the gas of described high temperature draught fan.
Alternatively, described system can also include: the second measuring instrument, it is possible to monitoring enters the oxygen content in the gas of described industrial furnace burner.
Alternatively, described system can also include: the 3rd measuring instrument, it is possible to monitoring enters the oxygen content in the air of described air-blaster.
This utility model is by arranging high temperature draught fan, high temperature draught fan is utilized to be mixed with air by part high-temperature flue gas, to reduce the oxygen content in mixing gas, mixing gas is made to enter supply fuel in industrial furnace burner again, burn under the state being at oxygen deprivation, thus reducing nitrogen oxides (NO in combustion processX) concentration of emission.
Accompanying drawing explanation
In conjunction with the drawings this utility model exemplary embodiment is described in more detail, of the present utility model above-mentioned and other purpose, feature and advantage will be apparent from, wherein, in utility model exemplary embodiment mode, identical reference number typically represents same parts.
Fig. 1 illustrates the schematic diagram of a kind of Waste heat recycling system of industrial furnaces according to an embodiment of the present utility model.
Description of reference numerals
1-industrial furnace body, 2-high temperature draught fan, 3-air-blaster, 4-high-temperature flue gas air-introduced machine, 5-air inlet scoop, 6-self-discharging chimney, 7-the first measuring instrument, 8-the second measuring instrument, 9-the 3rd measuring instrument, 10-air preheater, 11-industrial furnace burner
Detailed description of the invention
System described in this utility model may include that industrial furnace body；Industrial furnace burner；High temperature draught fan, wherein, described industrial furnace body and described industrial furnace burner are connected in series, and the part high-temperature flue gas that described industrial furnace body is discharged is introduced in described industrial furnace burner by described high temperature draught fan.
In present embodiment, high temperature draught fan can be connected by ventilation shaft with industrial furnace body and industrial furnace burner, fuel can be placed in industrial furnace burner, air enters supply fuel in industrial furnace burner by air draught pipeline and burns, the high-temperature flue gas generated after burning is discharged through the process of flue gas ventilation shaft from industrial furnace body, a portion can be introduced in air draught pipeline by high temperature draught fan and mix with air, and mixed gas jointly enters in industrial furnace burner and again burns.This industrial furnace burner is particular design, normal combustion when it can make fuel be in oxygen content wherein lower than content of oxygen in air.Owing to mix with air by the high-temperature flue gas after burning, oxygen content in mixed gas reduces, and makes to burn under the state that fuel is in oxygen deprivation, such that it is able to nitrogen oxides (NO in reduction combustion processX) concentration of emission.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: air inlet scoop.Air inlet scoop is connected by air draught pipeline with industrial furnace burner.Air inlet scoop can be arranged at a port of air draught pipeline.Can aid in draw air in air draught pipeline by arranging air inlet scoop, thus the fuel being supplied in industrial furnace burner burns.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: air-blaster.Air-blaster can be arranged on the air draught pipeline between air inlet scoop and industrial furnace burner, to accelerate the flowing velocity of air entrance industrial furnace burner.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: self-discharging chimney.Self-discharging chimney is connected by flue gas ventilation shaft with industrial furnace body.Self-discharging chimney can be arranged at a port of flue gas ventilation shaft.The flue gas that fuel generates after burning in industrial furnace burner is after industrial furnace body is discharged, a part is introduced in air draught pipeline by high temperature draught fan and mixes with air, mixed gas enters supply fuel combustion in industrial furnace burner jointly, another part enters self-discharging chimney through flue gas ventilation shaft, and then enters air.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: high-temperature flue gas air-introduced machine.High-temperature flue gas air-introduced machine can be arranged on the flue gas ventilation shaft between self-discharging chimney and industrial furnace body, to accelerate the flowing velocity of flue gas entrance self-discharging chimney.This high-temperature flue gas air-introduced machine can tolerable temperature be that the high-temperature flue gas of more than 300 DEG C passes through.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: air preheater.Air preheater can be arranged on the air draught pipeline between air-blaster and industrial furnace burner, for instance can relatively close air-blaster.Air can first pass through air preheater before entering industrial furnace burner, and so that air to be preheated, the high-temperature flue gas that the air after preheating introduces with high temperature draught fan mixes, and jointly enters supply fuel combustion in industrial furnace burner after mixing again.It is also possible to air preheater is connected with flue gas ventilation shaft, so that the part high-temperature flue gas that industrial furnace body is discharged can also be discharged after described air preheater cools down.Air is preheated by the waste heat after so can utilizing burning, can waste heat be reclaimed on the one hand, reduces wasting of waste heat, burning can be promoted on the other hand through the air of preheating, improve ignition temperature, reduce loss of the inadequacy burning for chemistry mechanics reason, and then obtain effectively energy-conservation purpose.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: the first measuring instrument.First instrumentation can be disposed in proximity to the position, gas access of high temperature draught fan, enters the oxygen content in the gas of high temperature draught fan with real-time monitoring.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: the second measuring instrument.Second instrumentation can be disposed in proximity to the position, gas access of industrial furnace burner, enters the oxygen content in the gas of industrial furnace burner with real-time monitoring.
In one embodiment, Waste heat recycling system of industrial furnaces can also include: the 3rd measuring instrument.3rd measuring instrument can be arranged between air inlet scoop and air-blaster, for instance near the position, gas access of air-blaster, enters the oxygen content in the gas of air-blaster with real-time monitoring.
This utility model is by arranging high temperature draught fan, high temperature draught fan is utilized to be mixed with air by part high-temperature flue gas, to reduce the oxygen content in mixing gas, mixing gas is made to enter supply fuel in industrial furnace burner again, burn under the state being at oxygen deprivation, thus reducing nitrogen oxides (NO in combustion processX) concentration of emission.
Embodiment
It is more fully described preferred embodiment of the present utility model below with reference to accompanying drawings.Although accompanying drawing shows preferred embodiment of the present utility model, however, it is to be appreciated that may be realized in various forms this utility model and should do not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are to make this utility model more thorough and complete, and scope of the present utility model can intactly be conveyed to those skilled in the art.
Fig. 1 illustrates the schematic diagram of a kind of Waste heat recycling system of industrial furnaces according to an embodiment of the present utility model.It is connected by ventilation shaft between each parts.As it is shown in figure 1, this system includes: industrial furnace body 1；Industrial furnace burner 11；High temperature draught fan 2, wherein, described industrial furnace body 1 is connected in series with described industrial burner 11, and the part high-temperature flue gas that described industrial furnace body 1 is discharged is introduced in described industrial furnace burner 11 by described high temperature draught fan 2.High temperature draught fan 2 is connected by ventilation shaft with industrial furnace body 1 and industrial furnace burner 11, fuel is placed in industrial furnace burner 11, air enters supply fuel in industrial furnace burner 11 by air draught pipeline and burns, the high-temperature flue gas generated after burning is discharged through the process of flue gas ventilation shaft from industrial furnace body 1, a portion can be introduced in air draught pipeline by high temperature draught fan 2 and mix with air, and mixed gas jointly enters in industrial furnace burner 11 and again burns.This industrial furnace burner 11 is particular design, normal combustion when it can make fuel be in oxygen content wherein lower than content of oxygen in air.Owing to mix with air by the high-temperature flue gas after burning, oxygen content in mixed gas reduces, and makes to burn under the state that fuel is in oxygen deprivation, such that it is able to nitrogen oxides (NO in reduction combustion processX) concentration of emission.
In the present embodiment, Waste heat recycling system of industrial furnaces also includes: air inlet scoop 5, air-blaster 3.Air inlet scoop 5 is connected by air draught pipeline with industrial furnace burner 11.Air inlet scoop 5 is arranged at a port of air draught pipeline.Can aid in draw air in air draught pipeline by arranging air inlet scoop 5, thus the fuel being supplied in industrial furnace burner 11 burns.Air-blaster 3 is arranged on the air draught pipeline between air inlet scoop 5 and industrial furnace burner 11, to accelerate the flowing velocity of air entrance industrial furnace burner 11.
In the present embodiment, Waste heat recycling system of industrial furnaces also includes: self-discharging chimney 6, high-temperature flue gas air-introduced machine 7.Self-discharging chimney 6 is connected by flue gas ventilation shaft with industrial furnace body 1.Self-discharging chimney 6 is arranged at a port of flue gas ventilation shaft.The flue gas that fuel generates after burning in industrial furnace burner 11 is after industrial furnace body 1 is got rid of, a part is introduced in air draught pipeline by high temperature draught fan 2 and mixes with air, mixed gas enters supply fuel combustion in industrial furnace burner 11 jointly, another part enters self-discharging chimney 6 through flue gas ventilation shaft, and then enters air.High-temperature flue gas air-introduced machine 7 is arranged on the flue gas ventilation shaft between self-discharging chimney 6 and industrial furnace body 1, to accelerate the flowing velocity of flue gas entrance self-discharging chimney 6.This high-temperature flue gas air-introduced machine 7 can tolerable temperature be that the high-temperature flue gas of more than 300 DEG C passes through.
In the present embodiment, Waste heat recycling system of industrial furnaces also includes: air preheater 10.Air preheater 10 can be arranged on the air draught pipeline between air-blaster 3 and industrial furnace burner 11, for instance can relatively close air-blaster 3.Air can first pass through air preheater 10 before entering industrial furnace burner 11, and so that air to be preheated, the high-temperature flue gas that the air after preheating introduces with high temperature draught fan 2 mixes, and jointly enters supply fuel combustion in industrial furnace burner 11 after mixing again.Meanwhile, as shown in Figure 1, it is also possible to air preheater 10 is connected with flue gas ventilation shaft, so that the part high-temperature flue gas that industrial furnace body 1 is discharged can also be discharged after described air preheater 10 cools down.Air is preheated by the waste heat after so can utilizing burning, can waste heat be reclaimed on the one hand, reduces wasting of waste heat, burning can be promoted on the other hand through the air of preheating, improve ignition temperature, reduce loss of the inadequacy burning for chemistry mechanics reason, and then obtain effectively energy-conservation purpose.
In the present embodiment, Waste heat recycling system of industrial furnaces also includes: first measuring instrument the 7, second measuring instrument the 8, the 3rd measuring instrument 9；First instrumentation 7 can be disposed in proximity to the position, gas access of high temperature draught fan 2, enters the oxygen content in the gas of high temperature draught fan 2 with real-time monitoring；Second instrumentation 8 can be disposed in proximity to the position, gas access of industrial furnace burner 11, enters the oxygen content in the gas of industrial furnace burner 11 with real-time monitoring；3rd measuring instrument 9 can be arranged between air inlet scoop 5 and air-blaster 3, for instance near the position, gas access of air-blaster 3, enters the oxygen content in the gas of air-blaster 3 with real-time monitoring.
This utility model is by arranging high temperature draught fan, high temperature draught fan is utilized to be mixed with air by part high-temperature flue gas, to reduce the oxygen content in mixing gas, mixing gas is made to enter supply fuel in industrial furnace burner again, burn under the state being at oxygen deprivation, thus reducing nitrogen oxides (NO in combustion processX) concentration of emission.
Additionally, for the industrial combustion furnace having been provided with residual neat recovering system, it is only necessary to after the mode of operation in original system is natural ventilating status by forced ventilation state transfer, according to this utility model, it is transformed.Then have only to increase a high temperature draught fan for the industrial combustion furnace being not provided with residual neat recovering system.Few compared to replacing industrial furnace burner or SCR, SNCR method reforming content in prior art, and cost puts into low.
Technique scheme is the exemplary embodiment of the present invention, for those skilled in the art, the utility model discloses on the basis of application process and relative theory, it is easy to make various types of improvement or deformation, it is not limited solely to the structure described by the above-mentioned specific embodiment of this utility model, therefore previously described mode is simply preferred, and does not have restrictive meaning.
Claims (9)
1. a Waste heat recycling system of industrial furnaces, it is characterised in that described system includes:
Industrial furnace body (1)；
Industrial furnace burner (11)；
High temperature draught fan (2),
Wherein, described industrial furnace body (1) and described industrial furnace burner (11) are connected in series, and the part high-temperature flue gas that described industrial furnace body (1) is discharged is introduced in described industrial furnace burner (11) by described high temperature draught fan (2).
2. Waste heat recycling system of industrial furnaces according to claim 1, it is characterised in that described system also includes:
Air inlet scoop (5), described air inlet scoop (5) introduces air in described industrial furnace burner (11).
3. Waste heat recycling system of industrial furnaces according to claim 2, it is characterised in that described system also includes:
Air-blaster (3), described air-blaster (3) will introduce in described industrial furnace burner (11) from the air of described air inlet scoop (5).
4. Waste heat recycling system of industrial furnaces according to claim 1, it is characterised in that described system also includes:
Self-discharging chimney (6), the partial fume that described industrial furnace body (1) is discharged is discharged by described self-discharging chimney (6).
5. Waste heat recycling system of industrial furnaces according to claim 4, it is characterised in that described system also includes:
High-temperature flue gas air-introduced machine (4), the partial fume that described industrial furnace body (1) is discharged enters described self-discharging chimney (6) afterwards by described high-temperature flue gas air-introduced machine (4).
6. according to the Waste heat recycling system of industrial furnaces one of claim 2-5 Suo Shu, it is characterised in that described system also includes:
Air preheater (10), air is introduced in described industrial furnace burner (11) after described air preheater (10) preheats；The part high-temperature flue gas that described industrial furnace body (1) is discharged is discharged after described air preheater (10) cools down.
7. Waste heat recycling system of industrial furnaces according to claim 1, it is characterised in that described system also includes:
First measuring instrument (7), monitoring enters the oxygen content in the gas of described high temperature draught fan (2).
8. Waste heat recycling system of industrial furnaces according to claim 1, it is characterised in that described system also includes:
Second measuring instrument (8), monitoring enters the oxygen content in the gas of described industrial furnace burner (11).
9. Waste heat recycling system of industrial furnaces according to claim 3, it is characterised in that described system also includes:
3rd measuring instrument (9), monitoring enters the oxygen content in the air of described air-blaster (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620042128.9U CN205373424U (en) | 2016-01-15 | 2016-01-15 | Industrial furnace waste heat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620042128.9U CN205373424U (en) | 2016-01-15 | 2016-01-15 | Industrial furnace waste heat recovery system |
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| CN205373424U true CN205373424U (en) | 2016-07-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869911A (en) * | 2017-11-17 | 2018-04-03 | 北京拓首能源科技股份有限公司 | A kind of energy-saving and emission-reduction gas supply-discharge system of tubular heater |
| CN116026159A (en) * | 2022-12-26 | 2023-04-28 | 山东京博石油化工有限公司 | Oxygen-matching combustion process system of heating furnace |
| CN117287985A (en) * | 2023-09-28 | 2023-12-26 | 荣成伽耶船业有限公司 | Hydrogen preheating furnace waste heat recovery system |
-
2016
- 2016-01-15 CN CN201620042128.9U patent/CN205373424U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107869911A (en) * | 2017-11-17 | 2018-04-03 | 北京拓首能源科技股份有限公司 | A kind of energy-saving and emission-reduction gas supply-discharge system of tubular heater |
| CN116026159A (en) * | 2022-12-26 | 2023-04-28 | 山东京博石油化工有限公司 | Oxygen-matching combustion process system of heating furnace |
| CN116026159B (en) * | 2022-12-26 | 2024-05-31 | 山东京博石油化工有限公司 | Oxygen-matching combustion process system of heating furnace |
| CN117287985A (en) * | 2023-09-28 | 2023-12-26 | 荣成伽耶船业有限公司 | Hydrogen preheating furnace waste heat recovery system |
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