CN204555719U - The energy-saving denitrating system of a kind of sinter fume - Google Patents
The energy-saving denitrating system of a kind of sinter fume Download PDFInfo
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- CN204555719U CN204555719U CN201520196356.7U CN201520196356U CN204555719U CN 204555719 U CN204555719 U CN 204555719U CN 201520196356 U CN201520196356 U CN 201520196356U CN 204555719 U CN204555719 U CN 204555719U
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- flue
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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
- Y02P10/25—Process efficiency
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model discloses the energy-saving denitrating system of a kind of sinter fume, comprises denitrification apparatus, heat exchanger, circulating fan and ammonifying device.The utility model makes full use of the waste heat of sintering process, realizes sinter fume NO_x Reduction by Effective, and Mist heat recovering.The utility model can significantly reduce sintered fume nitric oxide discharge capacity, improves the waste heat recovery level of sintering process.
Description
Technical field
The utility model relates to sintering process environmental protection and energy conserving system, is specifically related to a kind of energy-saving denitration technique for steel enterprise sintering technique and device.
Background technology
At present, in steel manufacture process, the energy consumption of sintering circuit accounts for 12% of total energy consumption, be only second to Iron-smelting, occupy second, containing a large amount of nitrogen oxide in the flue gas that sintering process is discharged, according to iron and steel, pelletizing industrial air pollution thing discharge standard (GB28662-2-12), sinter fume need carry out denitration process.The denitrating technique of current maturation is SCR method, and required flue-gas temperature is 300 ~ 380 DEG C, but the flue gas of sintering is 100 ~ 150 DEG C, therefore as directly carried out denitration to sinter fume, then needs to consume a large amount of coal gas to add heat smoke, will significantly increase the energy consumption of sintering." the online method of denitration in sintering process " invention (CN1286314A), mainly increase the adhesive aids such as granulated sugar at the blending process of SINTERING PRODUCTION, this method operating cost raises greatly; " a kind of method removing nitrogen oxide in sinter fume " invention (CN101053749A), the method adds the compound containing ammonia in sinter mixture, described releases ammonia containing amide in sintering process, be nitrogen by the reduction of nitrogen oxide in sinter fume, although this method can remove nitrogen oxide, there is operating cost high problem equally." sinter fume denitration and bootstrap system " invention (CN204202411U), mainly rear of sintering machine bellows high-temperature flue gas is passed through heat exchanger, add the flue gas hankering leading portion bellows, thus reach the requirement carrying out the denitration of SCR technique, centering leading portion bellows flue gas carries out denitration, adopt in this way, due to the thermal Finite of flue gas, only can carry out denitration process to about 20% exhaust gas volumn that sintering process produces, the nitrogen oxide contained by the flue gas in addition in rear of sintering machine bellows is suitable with middle leading portion flue gas content." a kind of method sintering denitrating system and remove nitrogen oxide " invention (CN103157356A), the method adopted is in sintering process, bellows flue gas high for sintering machine nitrogen-containing oxide concentration is drawn, by adding natural gas, return corresponding sintering charge level, with the nitrogen oxide generation chemical reaction in flue gas, thus realize denitration, the method operating cost is higher, and denitration efficiency is low.This is because in sintering process, nitrogen oxide in sinter fume is fuel type, the amount of nitrogen oxides of each bellows flue gas is substantially identical, natural gas is adopted to come the nitrogen oxides reduction efficiency comparatively end, natural gas only can reduce the thermal NO in flue gas, and the amount of nitrogen oxides in sinter fume is very low.
Summary of the invention
The purpose of this utility model: being exactly to overcome the deficiencies in the prior art, providing a kind of sinter fume energy-saving denitrating system.The utility model adopts sinter fume round-robin method, nitrogen oxide in flue gas is carried out attached collection, improve the temperature of sinter fume simultaneously, and by reclaiming the hot waste gas of low temperature central cooler, the temperature of further raising sinter fume, thus low cost meets the technological requirement of SCR denitration, realizes SCR technique and carries out denitration to sinter fume, improve denitration efficiency, and waste heat recovery is carried out to the high-temperature flue gas after denitration.
Technical scheme: for solving the problems of the technologies described above, the energy-saving denitrating system of a kind of sinter fume of the present utility model, comprises leading portion separator valve in sintering machine, central cooler, large flue, circulating fan, large flue, sintering machine stage casing fan housing, sintering machine back segment fan housing, denitration flue, large flue posterior segment separator valve, middle hot precipitator, denitrator, heat exchanger, electric cleaner, main exhauster.Sintering machine large flue is established leading portion separator valve and large flue posterior segment separator valve in large flue; Stage casing fan housing and back segment fan housing is established above sintering pallet; Large flue between middle leading portion separator valve and posterior segment separator valve establishes stage casing circulation airduct and damper, large flue connects sintering machine back segment fan housing by stage casing circulation airduct, intercycle blower fan established by circulation airduct in stage casing, large flue after the separator valve of posterior segment establishes denitration flue, and denitration flue is connected with electric cleaner; Denitration flue is established denitrator, heat exchanger.
The energy-saving denitrating system preferred version of a kind of sinter fume of the present utility model, for establish central cooler low-temperature zone petticoat pipe in central cooler low-temperature zone, central cooler warm-air pipe is established by central cooler low-temperature zone petticoat pipe; Described central cooler warm-air pipe is connected with sintering machine stage casing fan housing, back segment fan housing.
Preferred version of the present utility model is that leading portion establishes leading portion fan housing above sintering pallet, mends air door, front ammonifying device before leading portion fan housing is established.
Preferred version of the present utility model mends air door and middle ammonifying device, ammonifying device after sintering machine back segment fan housing is established in establishing on the fan housing of sintering machine stage casing.
Preferred version of the present utility model is that denitrator adopts SCR denitration device.
Preferred version of the present utility model is that heat exchanger adopts waste heat boiler.
Preferred version of the present utility model is hot precipitator and damper in establishing on denitration flue; Middle hot precipitator is set to multitube Ceramic dust collector.
Preferred version of the present utility model is that the large flue between large flue posterior segment separator valve and electric cleaner adopts porcelain enamel steel tube.
Preferred version of the present utility model is that the denitration flue between heat exchanger and electric cleaner adopts porcelain enamel steel tube.
Preferred version of the present utility model is that the large flue between middle leading portion separator valve and main exhauster establishes first section of separator valve, between middle leading portion separator valve and first section of separator valve, large flue establishes leading portion circulation airduct, leading portion circulation airduct establishes leading portion circulating fan and damper, and large flue is connected with stage casing fan housing by leading portion circulation airduct.
Technological process of the present utility model: by circulating fan, the flue gas of leading portion bellows in sintering machine is extracted out the fan housing sending into rear of sintering machine, and mix with the hot waste gas of central cooler low-temperature zone, improve the wind-warm syndrome of rear of sintering machine charge level, and by the attached collection of flue gas nitride of middle leading portion bellows to tail bellows large flue, flue gas in tail large flue not only nitrogen-containing oxide, and temperature also reaches the requirement of SCR technique, then this high temperature, the flue gas of high nitride is admitted to denitration flue, then enter middle hot precipitator and carry out dedusting, flue gas after dedusting, send into denitrator and carry out denitration, high-temperature flue gas after denitration sends into heat exchanger heat exchange, flue gas after heat exchange is sent into electric cleaner and is carried out further dedusting, then desulfurization is sent to.
Sintering machine leading portion fan housing, stage casing fan housing and back segment fan housing increase ammonifying device, and carries out ammonification, sintering machine achieves SNCR and SCR combined denitration technique, reach degree of depth denitration object.
The utility model beneficial effect is:
1) utilize the waste heat of sintering process to carry out denitration, save a large amount of coal gas.
2) sintering process waste heat recovery level is improved.
3) at sintering production process, realize SNCR and SCR combined denitration technique, reach degree of depth denitration object.
Accompanying drawing explanation
Fig. 1 is the energy-saving denitrating system schematic diagram of a kind of sinter fume of the utility model;
1, stage casing circulation airduct 2, large flue 3, intercycle blower fan 4, middle leading portion separator valve 5, leading portion fan housing 6, front benefit air door 7, front ammonifying device 8, stage casing fan housing 9, middle benefit air door 10, back segment fan housing 11, central cooler warm-air pipe 12, central cooler low-temperature zone petticoat pipe 13, denitration flue 14, posterior segment separator valve 15, middle hot precipitator 16, denitrator ammonifying device 17, denitrator 18, heat exchanger 19, first section of separator valve, 20, leading portion circulating fan 21, electric cleaner 22, main exhauster
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the energy-saving denitrating system of a kind of sinter fume of the present utility model, mainly comprise sintering machine, central cooler, large flue (2), intercycle blower fan (3), leading portion separator valve (4) in large flue, sintering machine stage casing fan housing (8), sintering machine back segment fan housing (10), denitration flue (13), large flue posterior segment separator valve (14), middle hot precipitator (15), denitrator (17), heat exchanger (18), electric cleaner (21), main exhauster (20), leading portion separator valve (4) and large flue posterior segment separator valve (14) in sintering machine large flue (2) upper installation large flue, large flue is divided into three sections, middle leading portion separator valve is arranged on 1/3 bellows place before sintering machine, and posterior segment separator valve is arranged on sintering machine back segment 1/3 bellows place, first 1/3 section of sintering pallet, leading portion fan housing (5) is installed, leading portion fan housing is installed and mends air door (6) and ammonifying device (7), in the middle of sintering machine, 1/3 section stage casing fan housing (8) is installed, mends air door (9) upper installation of stage casing fan housing (8), 1/3 section back segment fan housing (10) is installed at sintering machine rear portion, large flue between middle leading portion separator valve (4) and posterior segment separator valve (14) installs stage casing circulation airduct (1), by the stage casing airduct (1) that circulates, large flue (2) is connected with sintering machine back segment fan housing (10), at stage casing circulation airduct (1) upper installation intercycle blower fan (3), air door is installed into out, for regulating the air quantity of circulating fan in the import and export of intercycle blower fan, large flue between middle leading portion separator valve (4) and main exhauster is installed first section of separator valve (19), first section of separator valve (19) and in before large flue (2) is upper between separator valve (4) installs leading portion circulation airduct, leading portion circulation airduct is installed leading portion circulating fan (20), large flue is connected with sintering machine stage casing fan housing (8) by leading portion circulation airduct, and turnover adjustment doors installed by leading portion circulating fan.
Large flue after posterior segment separator valve (14) is installed denitration flue (13), denitration flue (13) is connected with electric cleaner (21); Hot precipitator (15), denitrator (17), heat exchanger (18) during denitration flue is installed.Installing ring cold low-temperature zone petticoat pipe (12) in central cooler low-temperature zone, is connected with sintering machine stage casing fan housing (8), back segment fan housing (10) at upper installing ring cold warm-air pipe (11) the central cooler warm-air pipe (11) of central cooler low-temperature zone petticoat pipe (12).Denitrator (17) adopts SCR denitration device, is provided with board-like catalytic converter device in denitrator.Heat exchanger (18) adopts waste heat boiler.Deduster (15) adopts multitube Ceramic dust collector.Large flue between large flue posterior segment separator valve (14) and electric cleaner (21) adopts porcelain enamel steel tube.Denitration flue (13) between heat exchanger (18) and electric cleaner (21) adopts porcelain enamel steel tube.
Ammonifying device after sintering machine back segment fan housing is installed.
The utility model system cloud gray model flow process: the flue gas of sintering machine leading portion bellows is sent into fan housing (8) in the middle of sintering machine by leading portion circulation airduct by leading portion circulating fan (20), mix with central cooler low-temperature zone hot waste gas, improve temperature and the oxygen content of the hot blast for sintering, for sintering machine stage casing sintering, and the nitrogen oxide in middle bellows flue gas is made to have carried out attached collection, intercycle blower fan (3) is by the flue gas of bellows in the middle of sintering machine, sintering machine back segment fan housing is sent into by the stage casing airduct (1) that circulates, mix with the hot waste gas of central cooler low-temperature zone, improve temperature and the oxygen content of the hot blast for sintering, sinter for sintering machine back segment, sintering machine back segment enters the flue gas of large flue, and not only temperature is high, and due to the attached collection of the nitrogen oxide in the flue gas in stage casing, amount of nitrogen oxides in flue gas is also higher, after first this part flue gas is admitted to the dedusting of multitube Ceramic dust collector, then send in denitrator, nitrogen oxide in flue gas is under catalyst action, nitrogen is generated with anti-biochemical reaction of ammonia, realize denitrating flue gas, flue gas after denitration is sent into waste heat boiler and is carried out heat exchange production steam, after heat exchange, flue gas sends into electric cleaner dedusting after mixing with the using smoke from big gas duct of sintering machine leading portion, finally send into desulphurization system and carry out desulfurization.Sintering machine leading portion, stage casing, by directly carrying out ammonification at the ammonifying device of leading portion fan housing (5) and stage casing fan housing (8), adopt SNCR method to carry out denitration to sintering machine leading portion and stage casing.
The present embodiment is SNCR and SCR combined denitration, and can realize the denitration of the sinter fume degree of depth, denitration efficiency can reach more than 60%, and does not need to heat sinter fume.
The above is only preferred embodiment of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection model of the present utility model.
Claims (10)
1. the energy-saving denitrating system of sinter fume, comprise sintering machine, central cooler, large flue (2), intercycle blower fan (3), leading portion separator valve (4) in large flue, sintering machine stage casing fan housing (8), sintering machine back segment fan housing (10), denitration flue (13), large flue posterior segment separator valve (14), middle hot precipitator (15), denitrator (17), heat exchanger (18), electric cleaner (21), main exhauster (22), it is characterized in that: described establishes leading portion separator valve (4) and large flue posterior segment separator valve (14) in large flue on sintering machine large flue (2), described establishes stage casing fan housing (8) and back segment fan housing (10) above sintering pallet, the described large flue between middle leading portion separator valve (4) and posterior segment separator valve (14) establishes stage casing circulation airduct (1) and damper, large flue (2) by stage casing circulate airduct (1) connect sintering machine back segment fan housing (10), stage casing circulation airduct (1) is established intercycle blower fan (3), the described large flue after posterior segment separator valve (14) establishes denitration flue (13), and large flue (2) is connected with electric cleaner (21) by denitration flue (13), described establishes denitrator (17), heat exchanger (18) on denitration flue (13).
2. the energy-saving denitrating system of a kind of sinter fume according to claim 1, it is characterized in that: described establishes central cooler low-temperature zone petticoat pipe (12) in central cooler low-temperature zone, and central cooler low-temperature zone petticoat pipe (12) is established central cooler warm-air pipe (11); Described central cooler warm-air pipe (11) is connected with sintering machine stage casing fan housing (8), back segment fan housing (10).
3. the energy-saving denitrating system of a kind of sinter fume according to claim 1, it is characterized in that: described leading portion above sintering pallet establishes leading portion fan housing (5), before leading portion fan housing (5) is established, mend air door (6), front ammonifying device (7).
4. the energy-saving denitrating system of a kind of sinter fume according to claim 1, is characterized in that: described establish on the fan housing of sintering machine stage casing in mend air door (9) and middle ammonifying device; Described establishes rear ammonifying device on sintering machine back segment fan housing (10).
5. the energy-saving denitrating system of a kind of sinter fume according to claim 1, is characterized in that: described denitrator (17) is SCR denitration device.
6. the energy-saving denitrating system of a kind of sinter fume according to claim, is characterized in that: described heat exchanger (18) is waste heat boiler.
7. the energy-saving denitrating system of a kind of sinter fume according to claim 1, is characterized in that: described establishes damper and middle hot precipitator (15) on denitration flue (13); Described middle hot precipitator (15) is multitube Ceramic dust collector.
8. the energy-saving denitrating system of a kind of sinter fume according to claim 1, is characterized in that: the described large flue between large flue posterior segment separator valve (14) and electric cleaner (21) adopts porcelain enamel steel tube.
9. the energy-saving denitrating system of a kind of sinter fume according to claim 1, is characterized in that: the described denitration flue (13) between heat exchanger (18) and electric cleaner (21) adopts porcelain enamel steel tube.
10. the energy-saving denitrating system of a kind of sinter fume according to claim 1, it is characterized in that: the described large flue between middle leading portion separator valve (4) and main exhauster establishes first section of separator valve (19), between middle leading portion separator valve (4) and first section of separator valve (19), large flue establishes leading portion circulation airduct, leading portion circulation airduct is established leading portion circulating fan (20) and damper, and large flue (2) is connected with stage casing fan housing (8) by leading portion circulation airduct.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520196356.7U CN204555719U (en) | 2015-03-31 | 2015-03-31 | The energy-saving denitrating system of a kind of sinter fume |
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| CN201520196356.7U CN204555719U (en) | 2015-03-31 | 2015-03-31 | The energy-saving denitrating system of a kind of sinter fume |
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| CN204555719U true CN204555719U (en) | 2015-08-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792186A (en) * | 2015-03-31 | 2015-07-22 | 孙慕文 | Sintering flue gas energy-saving type denitrification system |
| CN107930396A (en) * | 2017-11-28 | 2018-04-20 | 中南大学 | A kind of method for sintering fume centralized high-efficiency desulfurization denitration |
-
2015
- 2015-03-31 CN CN201520196356.7U patent/CN204555719U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792186A (en) * | 2015-03-31 | 2015-07-22 | 孙慕文 | Sintering flue gas energy-saving type denitrification system |
| CN107930396A (en) * | 2017-11-28 | 2018-04-20 | 中南大学 | A kind of method for sintering fume centralized high-efficiency desulfurization denitration |
| CN107930396B (en) * | 2017-11-28 | 2020-03-24 | 中南大学 | Method for concentrated and efficient desulfurization and denitrification of sintering flue gas |
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Granted publication date: 20150812 Effective date of abandoning: 20161012 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |