CN107543423A - A kind of novel energy-conserving flue gas processing method and system - Google Patents
A kind of novel energy-conserving flue gas processing method and system Download PDFInfo
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- CN107543423A CN107543423A CN201711050800.4A CN201711050800A CN107543423A CN 107543423 A CN107543423 A CN 107543423A CN 201711050800 A CN201711050800 A CN 201711050800A CN 107543423 A CN107543423 A CN 107543423A
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- flue gas
- flue
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- 239000003546 flue gas Substances 0.000 title claims abstract description 92
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000003672 processing method Methods 0.000 title claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 30
- 239000000779 smoke Substances 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 41
- 239000002918 waste heat Substances 0.000 claims description 22
- 238000006477 desulfuration reaction Methods 0.000 claims description 19
- 230000023556 desulfurization Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 9
- 238000009766 low-temperature sintering Methods 0.000 claims description 9
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 239000003721 gunpowder Substances 0.000 abstract description 3
- 239000003517 fume Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a kind of novel energy-conserving flue gas processing method and system, flue gas containing nitre is sent directly into perpendicular cold kiln, utilize the hot properties of perpendicular cold kiln discharge flue gas, sintering gas containing the smoke of gunpowder is heated to window temperature, realize the direct denitration of discharge flue gas, the heating before denitration in conventional flue gas processing method is avoided, the energy has been saved, also simplify smoke processing system.
Description
Technical field
It is especially a kind of to discharge flue gas when perpendicular cold kiln reduces sintered material temperature the invention belongs to sintering machine system field
Denitration process method and system.
Background technology
It is means relatively advanced in mineral material or building material cooling using perpendicular cold kiln cooling solid material, and existing
In technological means, the high-temperature gas for erecting cold kiln discharge is discharged after partial heat energy is utilized by high-temperature boiler through processing to air,
Though this process make use of the heat energy of discharge flue gas, in denitrification process behind also need that gas is carried out to be heated to SCR
The window temperature of denitrating technique, this can make it that energy usage amount improves in the processing procedure of flue gas；
SCR denitration technique has certain window temperature, due in sintering machine large flue in different bellows flue gas temperature
Difference, NO, SO2Content is different, and low-temperature flue gas can be exported close to igniter one end, and its interior smoke SO 2 content is relatively low, and NO contains
Amount is higher, and high-temperature flue gas can be exported close to the one end in sintered material exit, and its interior smoke SO 2 content is higher, and NO contents
It is relatively low, and experiment obtains after testing, the low-temperature flue gas that sintering machine is discharged is passed through into perpendicular cold kiln cools down to sintered material, erects cold
The flue gas of kiln gas outlet discharge is probably at 400 DEG C or so, just within the scope of the window temperature of SCR denitration technique, and the portion
Divide the lucky NO contents of flue gas higher, the present invention utilizes this principle, and the flue gas of perpendicular cold kiln discharge is directly utilized into SCR denitration technique
Denitration is carried out, the step of gas is reheated to the window temperature is avoided, has saved the energy.
The content of the invention
In view of this, the present invention is directed to propose a kind of novel energy-conserving flue gas processing method and system, are discharged using perpendicular cold kiln
The hot properties of flue gas, the direct denitration technique of flue gas is realized, the heating operation to flue gas is avoided, has saved the energy.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of novel energy-conserving smoke processing system, including sintering machine, flue, sintered material conveying equipment, perpendicular cold kiln
With SCR denitration unit；
The sintered material outlet of the sintering machine heat passes through sintered material conveying equipment and the sintered material for erecting cold kiln
Entrance is connected, and sintered material is sent into and erects cold kiln by sintered material conveying equipment by sintering machine；
Bellows in the large flue of sintering machine close to igniter one end are provided with first outlet, and the first outlet passes through cigarette
Feed channel is connected with erecting the air inlet of cold kiln；
The gas outlet for erecting cold kiln is connected by flue with the air inlet of the SCR denitration unit.
Further, the novel energy-conserving smoke processing system also includes afterburner, and heating dress is provided with the afterburner
Put, heating flows through flue gas in the afterburner, and to adjust SCR window temperature, the air inlet of the afterburner passes through fume pipe
Road is connected with the first outlet, and the gas outlet of the afterburner is connected by flue with erecting the flue at cold kiln gas outlet
It is logical.
Further, the novel energy-conserving smoke processing system also includes waste heat boiler and Turbo-generator Set, described remaining
The air inlet of heat boiler is connected by flue with the gas outlet of the SCR denitration unit, the Turbo-generator Set connection
On the pipeline of the waste heat boiler.
Further, the novel energy-conserving smoke processing system also includes SDA desulfurization units, the large flue of the sintering machine
The bellows of interior close sintered material exit end are provided with second outlet, and the air inlet of the SDA desulfurization units passes through fume pipe
Road is connected with the second outlet, and the gas outlet of the waste heat boiler is connected by the flue at flue and second outlet
It is logical.
Further, the novel energy-conserving smoke processing system also includes chimney, and the entrance of the chimney passes through fume pipe
Road is connected with the gas outlet of the SDA desulfurization units.
Further, the novel energy-conserving smoke processing system also includes controller, the air inlet of the SCR denitration unit
Place is provided with temperature sensor, is provided with flow control valve at the air inlet of afterburner, the temperature sensor and flow control valve with
Controller signals connect.
A kind of novel energy-conserving flue gas processing method, this method is in sintering machine sintered material, the situation of perpendicular cold kiln cooling material
Lower use, comprises the following steps：
(1) the low-temperature sintering flue gas in the large flue of sintering machine in the bellows of igniter one end is passed through perpendicular cold kiln
Air inlet so that erect cold kiln and use the low-temperature sintering flue gas cooling sintered material at this；
(2) flue gas of perpendicular cold kiln gas outlet discharge is passed through to the air inlet of SCR denitration unit, that is, utilizes SCR denitration unit
It is directly the discharge denitrating flue gas of perpendicular cold kiln.
Further, it is passed through in the step (2) in the flue gas of SCR denitration unit air inlet and is mixed with low-temperature sintering flue gas
Sintering flue gas after afterburner heats, to adjust the temperature for being passed through SCR denitration unit air inlet flue gas.
Further, temperature sensor is provided with the air inlet of the SCR denitration unit in the step (2), afterburner
Flow control valve is provided with air inlet, the temperature sensor and flow control valve are connected with controller signals, controller control
Into the flue gas flow of afterburner.
Further, the novel energy-conserving flue gas processing method also includes step (3), and the flue gas after denitration is passed through into waste heat
Boiler generates electricity, i.e., connects the gas outlet of SCR denitration unit with the air inlet of waste heat boiler.
Further, the novel energy-conserving flue gas processing method also includes step (4), will be close in the large flue of sintering machine
High temperature sintering flue gas in the bellows of sintered material exit end is passed through SDA desulfurization lists after being mixed with the flue gas that waste heat boiler is discharged
First desulfurization, is most discharged through chimney afterwards.
Relative to prior art, novel energy-conserving flue gas processing method of the present invention and system have the advantage that：
(1) novel energy-conserving flue gas processing method of the present invention and system, the high temperature that flue gas is discharged using perpendicular cold kiln are special
Property, sintering gas containing the smoke of gunpowder is heated to window temperature, realizes the direct denitration of discharge flue gas, avoids conventional fume treatment side
Heating in method before denitration, has saved the energy, also simplify smoke processing system.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the novel energy-conserving smoke processing system figure described in the embodiment of the present invention.
Description of reference numerals：
1- sintering machines；11- igniters；12- first outlets；13- second outlets；14- sintered materials export；2- fume pipes
Road；3- sintered material conveying equipments；4- erects cold kiln；5-SCR denitration units；6- afterburners；7- waste heat boilers；8- steam turbine generators
Group；9-SDA desulfurization units；10- chimneys.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, the present invention includes sintering machine 1, flue 2, sintered material conveying equipment 3, perpendicular cold kiln 4 and SCR
Denitration unit 5；
The sintered material outlet 14 of the heat of sintering machine 1 passes through sintered material conveying equipment 3 and the sintered material entrance for erecting cold kiln 4
It is connected, sintered material is sent into perpendicular cold kiln 4 by sintered material conveying equipment 3 by sintering machine 1；
Bellows in the large flue of sintering machine 1 close to the one end of igniter 11 are provided with first outlet 12, and first outlet 12 is logical
Cross flue 2 with erect cold kiln 4 air inlet be connected, it is relatively low using wind the temperature inside the box at first outlet 12, NO contents compared with
High flue gas cooling sintered material in perpendicular cold kiln 4；
The gas outlet for erecting cold kiln 4 is connected by flue 2 with the air inlet of SCR denitration unit 5, utilizes first outlet 12
Locate flue gas when cooling down sintered material in erecting cold kiln 4, erect the flue-gas temperature excluded at the cold gas outlet of kiln 4 in SCR denitration technique
In the range of window temperature, and the flue gas NO contents discharged at first outlet 12 are higher, therefore direct by erecting the flue gas discharged in cold kiln 4
The denitration of SCR denitration unit 5 is passed through, avoids in denitrating technique to the heating process of gas, has saved the energy.
Novel energy-conserving smoke processing system also includes afterburner 6, and heater is provided with afterburner 6, and heating flows through the benefit
Flue gas in hot device 6, the air inlet of the afterburner 6 are connected by flue 2 with first outlet 12, the outlet of the afterburner 6
Mouth is connected by flue 2 with erecting the flue 2 at the cold gas outlet of kiln 4, when the temperature containing the smoke of gunpowder that perpendicular cold kiln 4 is discharged is spent
When high or too low, the flue gas of the discharge of first outlet 12 is heated by afterburner 6, and by the flue gas after heating with erecting the cold row of kiln 4
The flue gas mixing gone out, to adjust the flue-gas temperature of input SCR denitration unit 5, ensures the normal and abundant progress of denitrification process.
Novel energy-conserving smoke processing system also includes waste heat boiler 7 and Turbo-generator Set 8, the air inlet of waste heat boiler 7
It is connected by flue 2 with the gas outlet of SCR denitration unit 5, Turbo-generator Set 8 is connected on the pipeline of waste heat boiler 7.
Novel energy-conserving smoke processing system also includes SDA desulfurization units 9, close to sintered material in the large flue of sintering machine 1
The bellows for exporting 14 one end are provided with second outlet 13, and the air inlet of SDA desulfurization units 9 passes through flue 2 and second outlet
13 connections, the gas outlet of waste heat boiler 7 are connected by flue 2 with the flue 2 at second outlet 13, i.e. waste heat boiler
The flue gas of discharge mixes with the flue gas discharged at second outlet before SDA desulfurization units, then passes to SDA desulfurization unit desulfurization,
It ensure that all flue gases in sintering machine by draining into air again after desulfurization process, reduce the SO in air2Pollution.
Novel energy-conserving smoke processing system also includes chimney 10, and the entrance of chimney 10 passes through flue 2 and SDA desulfurization lists
The gas outlet connection of member 9.
Blower fan is respectively equipped with first outlet 12 and second outlet 13, is arranged to extract the flue gas in bellows to flue
Go out.
Novel energy-conserving smoke processing system also includes controller, and TEMP is provided with the air inlet of SCR denitration unit 5
Device, flow control valve is provided with the air inlet of afterburner 6, and the temperature sensor and flow control valve connect with controller signals
Connect, controller controls the flue gas circulation in afterburner 6 by temperature sensor and flow control valve, realizes SCR denitration unit 5
Flue gas flows into the real-time regulation of temperature at air inlet.
A kind of novel energy-conserving flue gas processing method, this method is in sintering machine sintered material, the situation of perpendicular cold kiln cooling material
Lower use, comprises the following steps：
(1) the low-temperature sintering flue gas in the large flue of sintering machine 1 in the bellows of the one end of igniter 11 is passed through perpendicular cold
The air inlet of kiln 4 so that perpendicular cold kiln 4 uses the low-temperature sintering flue gas cooling sintered material at this；
(2) flue gas of the perpendicular cold gas outlet of kiln 4 discharge is passed through to the air inlet of SCR denitration unit 5, that is, utilizes SCR denitration list
Member 5 is directly the discharge denitrating flue gas of perpendicular cold kiln 4.
Be passed through in step (2) in the flue gas of the air inlet of SCR denitration unit 5 be mixed with low-temperature sintering flue gas through afterburner 6 plus
Sintering flue gas after heat, to adjust the temperature for being passed through the air inlet flue gas of SCR denitration unit 5.
Temperature sensor is provided with the air inlet of SCR denitration unit 5 in step (2), is provided with the air inlet of afterburner 6
Flow control valve, the temperature sensor and flow control valve are connected with controller signals, and controller control enters afterburner 6
Flue gas flow, controller are controlled the flue gas circulation in afterburner 6 by temperature sensor and flow control valve, realize that SCR takes off
Flue gas flows into the real-time regulation of temperature at the air inlet of nitre unit 5.
Novel energy-conserving flue gas processing method also includes step (3), and the flue gas after denitration is passed through into waste heat boiler 7 and generated electricity, i.e.,
The gas outlet of SCR denitration unit 5 is connected with the air inlet of waste heat boiler 7.
Novel energy-conserving flue gas processing method also includes step (4), will be exported in the large flue of sintering machine 1 close to sintered material
High temperature sintering flue gas in the bellows of one end is passed through the desulfurization of SDA desulfurization units 9 after being mixed with the flue gas that waste heat boiler 7 is discharged, most
Discharged by chimney 10.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
- A kind of 1. novel energy-conserving smoke processing system, it is characterised in that：Including sintering machine (1), flue (2), sintered material Conveying equipment (3), erect cold kiln (4) and SCR denitration unit (5)；The sintered material outlet of sintering machine (1) heat passes through sintered material conveying equipment (3) and the sintering for erecting cold kiln (4) Material inlet is connected, and sintered material is sent into and erects cold kiln (4) by sintered material conveying equipment (3) by sintering machine (1)；Bellows in the large flue of sintering machine (1) close to igniter (11) one end are provided with first outlet (12), and described first goes out Mouth (12) is connected by flue (2) with erecting the air inlet of cold kiln (4)；The gas outlet for erecting cold kiln (4) is connected by flue (2) with the air inlet of the SCR denitration unit (5).
- 2. novel energy-conserving smoke processing system according to claim 1, it is characterised in that：Also include afterburner (6), it is described Heater is provided with afterburner (6), heating flows through the flue gas in the afterburner (6), and the air inlet of the afterburner (6) passes through cigarette Feed channel (2) is connected with the first outlet (12), and the gas outlet of the afterburner (6) passes through flue (2) and perpendicular cold kiln (4) Flue (2) connection at gas outlet.
- 3. novel energy-conserving smoke processing system according to claim 1, it is characterised in that：Also include waste heat boiler (7) and Turbo-generator Set (8), the air inlet of the waste heat boiler (7) pass through flue (2) and the SCR denitration unit (5) Gas outlet is connected, and the Turbo-generator Set (8) is connected on the pipeline of the waste heat boiler (7).
- 4. novel energy-conserving smoke processing system according to claim 3, it is characterised in that：Also include SDA desulfurization units (9), the bellows in the large flue of the sintering machine (1) close to sintered material exit end are provided with second outlet (13), described The air inlet of SDA desulfurization units (9) is connected by flue (2) with the second outlet (13), the waste heat boiler (7) Gas outlet is connected by flue (2) with the flue (2) at second outlet (13) place.
- 5. novel energy-conserving smoke processing system according to claim 2, it is characterised in that：Also include controller, the SCR Temperature sensor is provided with the air inlet of denitration unit (5), flow control valve, the temperature are provided with the air inlet of afterburner (6) Sensor and flow control valve are connected with controller signals.
- 6. a kind of novel energy-conserving flue gas processing method, this method cools down material in sintering machine (1) sintered material, perpendicular cold kiln (4) Used under situation, it is characterised in that：Comprise the following steps：(1) the low-temperature sintering flue gas in the large flue of sintering machine (1) in the bellows of igniter (11) one end is passed through perpendicular cold The air inlet of kiln (4) so that erect cold kiln (4) and use the low-temperature sintering flue gas cooling sintered material at this；(2) flue gas of perpendicular cold kiln (4) gas outlet discharge is passed through to the air inlet of SCR denitration unit (5), that is, utilizes SCR denitration list First (5) are directly the discharge denitrating flue gas of perpendicular cold kiln (4).
- 7. novel energy-conserving flue gas processing method according to claim 6, it is characterised in that：SCR is passed through in the step (2) Sintering flue gas of the low-temperature sintering flue gas after afterburner (6) heating is mixed with the flue gas of denitration unit (5) air inlet, to adjust Section is passed through the temperature of SCR denitration unit (5) air inlet flue gas.
- 8. novel energy-conserving flue gas processing method according to claim 7, it is characterised in that：SCR in the step (2) takes off Temperature sensor is provided with the air inlet of nitre unit (5), flow control valve is provided with the air inlet of afterburner (6), the temperature passes Sensor and flow control valve are connected with controller signals, flue gas flow of the controller control into afterburner (6).
- 9. novel energy-conserving flue gas processing method according to claim 6, it is characterised in that also including step (3), by denitration Flue gas afterwards is passed through waste heat boiler (7) generating, i.e., connects the air inlet of the gas outlet of SCR denitration unit (5) and waste heat boiler (7) It is logical.
- 10. novel energy-conserving flue gas processing method according to claim 9, it is characterised in that：Also include step (4), will burn High temperature sintering flue gas in the large flue of knot machine (1) in the bellows of sintered material exit end is discharged with waste heat boiler (7) Flue gas mixing after be passed through SDA desulfurization units (9) desulfurization, most afterwards through chimney (10) discharge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711050800.4A CN107543423A (en) | 2017-10-31 | 2017-10-31 | A kind of novel energy-conserving flue gas processing method and system |
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| CN201711050800.4A CN107543423A (en) | 2017-10-31 | 2017-10-31 | A kind of novel energy-conserving flue gas processing method and system |
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ID=60968267
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726873A (en) * | 2017-11-10 | 2018-02-23 | 钢研晟华科技股份有限公司 | A kind of sintering flue gas is segmented and utilized perpendicular cold kiln emission reduction sulphur, the method for nitrogen oxides |
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| US4536211A (en) * | 1982-05-18 | 1985-08-20 | Sumitomo Metal Industries, Ltd. | Waste gas circulation method and system for sintering apparatus |
| CN105333748A (en) * | 2015-12-09 | 2016-02-17 | 北京京诚科林环保科技有限公司 | Comprehensive treatment system and method for sintering plant flue gas and application |
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| CN106524771A (en) * | 2015-09-10 | 2017-03-22 | 钢研晟华工程技术有限公司 | Technical method for denitration of sintering flue gas |
| CN107131770A (en) * | 2017-04-17 | 2017-09-05 | 钢研晟华工程技术有限公司 | A kind of agglomeration for iron mine waste heat recovery collaboration emission reduction SOXAnd NOXMethod |
| CN207635881U (en) * | 2017-10-31 | 2018-07-20 | 天津天丰双林节能环保科技有限公司 | A kind of novel energy-conserving smoke processing system |
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2017
- 2017-10-31 CN CN201711050800.4A patent/CN107543423A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4536211A (en) * | 1982-05-18 | 1985-08-20 | Sumitomo Metal Industries, Ltd. | Waste gas circulation method and system for sintering apparatus |
| CN106524771A (en) * | 2015-09-10 | 2017-03-22 | 钢研晟华工程技术有限公司 | Technical method for denitration of sintering flue gas |
| CN105333748A (en) * | 2015-12-09 | 2016-02-17 | 北京京诚科林环保科技有限公司 | Comprehensive treatment system and method for sintering plant flue gas and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107726873A (en) * | 2017-11-10 | 2018-02-23 | 钢研晟华科技股份有限公司 | A kind of sintering flue gas is segmented and utilized perpendicular cold kiln emission reduction sulphur, the method for nitrogen oxides |
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Application publication date: 20180105 |