CN108267009A - Grate hot-air system - Google Patents
Grate hot-air system Download PDFInfo
- Publication number
- CN108267009A CN108267009A CN201810257409.XA CN201810257409A CN108267009A CN 108267009 A CN108267009 A CN 108267009A CN 201810257409 A CN201810257409 A CN 201810257409A CN 108267009 A CN108267009 A CN 108267009A
- Authority
- CN
- China
- Prior art keywords
- section
- preheating
- cold machine
- hot
- ring cold
- 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.)
- Granted
Links
- 238000001035 drying Methods 0.000 claims abstract description 40
- 238000005422 blasting Methods 0.000 claims abstract description 22
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 6
- 238000007605 air drying Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 7
- 230000000505 pernicious effect Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000005453 pelletization Methods 0.000 description 5
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/005—Systems for reclaiming waste heat including pyrolising the waste gases
Abstract
The invention belongs to pellet production technical fields, more particularly, to a kind of grate hot-air system, it is characterized in that II section of preheating preheats II section and rear II section of preheating including preceding, mixing heat smoke in preceding II section of preheating is sent by hot air duct I to down-draft drying zone, the mixing heat smoke preheated afterwards in II section is sent by hot air duct II to I section of the preheating, III section of ring cold machine is connected by hot air duct III with the bellows of blasting drying period, III section of ring cold machine is connected by hot air duct IV with the upper cover of blasting drying period, deflector hole there are two being set on partition wall between III section of II section of ring cold machine and ring cold machine.It is of the invention rationally to be recycled using the heat of grate itself, that is, reduce system and convert cold blast rate, and can be to I section of effective concurrent heating of progress of preheating, the pernicious gas for not only having reduced the consumption of Pipeline Heating Furnace fuel but also having reduced due to burning and generating.
Description
Technical field
The invention belongs to pellet production technical field, more particularly, to a kind of grate hot-air system.
Background technology
In pelletizing production technique, grate-rotary kiln-ring cold machine has been the design technology of comparative maturity, hot wind
System is also that comparative maturity is perfect, from being continued to use always at the beginning of design to present.But as equipment enlarging, energy conservation and environmental protection require
Gradually upgrading and the rise of belt machine pelletizing, the deficiency and drawback of chain winding hot-air system start to reveal.
Original hot-air system is：The hot-air that III section of ring cold machine enters grate forced air drying by wind turbine and pipeline
In section, by pelletizing air after cooling by blasting drying period upper cover and pipeline, outdoor is discharged to by deduster and wind turbine；Ring cold machine
II section of hot-air enters grate by pipeline and preheats I section；The hot-air that I section of ring cold machine enters rotary kiln by pipeline
It is interior；Heat smoke in rotary kiln enters grate by kiln hood and preheats II section；Heat smoke in II section of preheating by pipeline and
Wind turbine enters grate down-draft drying zone；The flue gas of I section of down-draft drying zone and preheating is discharged to by pipeline, deduster and wind turbine
It is outdoor.
With the design of equipment enlarging, grate preheats II section and increasingly grows, so II section of leading portion of preheating and preheating II
There are temperature differences for section back segment（About at 100 DEG C or so）, the flue-gas temperature of entire II section of mixing of preheating is 500 DEG C -550 DEG C, this
Part heat smoke enters down-draft drying zone by pipeline.But due to the limitation of pelletizing burst temperature, enter down-draft drying zone
Interior flue gas will be less than 400 DEG C, so according to previous design, to be designed on the pipeline for enter down-draft drying zone several groups convert it is cold
Air-valve can just enter down-draft drying zone by dropping to 400 DEG C from the flue-gas temperature for preheating II section 500 DEG C -550 DEG C.It is this to set
Meter, not only adds additional the cold blast rate of system, causes the increase of main induced draft fan air quantity, and then increase the processing of desulphurization system
Ability.The heat smoke for preheating II section of different temperatures simultaneously does not obtain effective rationally utilization, causes the waste of heat.
The exhaust gas temperature excluded from blasting drying period upper cover generally at 60 DEG C -80 DEG C, so low temperature easily pipeline,
The damage for causing mechanical equipment is disclosed in deduster and wind turbine.In the design of previous hot-air system, from down-draft drying zone pipeline
On separate a pipeline and enter in blasting drying period upper cover, the heat smoke of down-draft drying zone（350℃-400℃）Introduce drum
In wind dryer section upper cover.But with the upgrading of environmental requirement, the partial fume from down-draft drying zone is due to wherein containing sulphur, institute
It cannot be directly discharged into air with the exhaust gas of blasting drying period, it is necessary to be handled by flue gas desulfurization, this certainly will increase desulfurization
The processing capacity of system causes the waste of investment.
The hot air temperature of III section of discharge of ring cold machine is generally at 100 DEG C -200 DEG C, and the temperature one that blasting drying period needs
As at 200 DEG C or so, concurrent heating is carried out to this partial air and meet the requirement of blasting drying period.In previous design, lead to
Heating furnace is often added on pipeline, air is heated by heating furnace combustion gas.This design, although it is cold effectively to increase ring
The hot air temperature that III section of machine, but the consumption of additional fuel is the increase in, while also increase the generation of pernicious gas.
Invention content
Grate self heat is rationally utilized the object of the present invention is to provide a kind of, reduces Pipeline Heating Furnace fuel consumption
The grate hot-air system generated with pernicious gas.
The purpose of the present invention is what is realized by following technical proposals：
The grate hot-air system of the present invention, including grate, the rotary kiln being connected with this grate is connected with this rotary kiln
The ring cold machine connect, connects the connecting pipe between the grate, rotary kiln and ring cold machine, and the grate is done including air blast
II section of dry section, down-draft drying zone, I section of preheating and preheating, the ring cold machine include I section of ring cold machine, II section of ring cold machine, ring cold machine
III section and IV section of ring cold machine, it is characterised in that II section of the preheating includes II section of preceding preheating and rear II section of preheating, pre- before described
Mixing heat smoke in II section of heat is sent by hot air duct I, the deduster I being arranged on the hot air duct I and backheat wind turbine I
To the down-draft drying zone, it is described after mixing heat smoke in II section of preheating by hot air duct II, be arranged on the hot wind
Deduster II and backheat wind turbine II on pipeline II are sent to I section of the preheating,
III section of the ring cold machine passes through hot air duct III, the drum dry-air blast machine being arranged on the hot air duct III and the air blast
The bellows of dryer section are connected, and III section of the ring cold machine is connected by hot air duct IV with the upper cover of the blasting drying period
It connects,
Deflector hole there are two being set on partition wall between III section of II section of the ring cold machine and ring cold machine.
II section of the preceding preheating is 1.5 with II segment length ratio of rear preheating:1-2.5:1.
It is equipped on the hot air duct I and converts low temperature valve.
Electricity is equipped on the hot air duct IV and at the thermocouple interlocking in the upper cover of the blasting drying period
Dynamic butterfly valve.
The a diameter of 750mm-850mm of the deflector hole.
Advantages of the present invention：
（1）Preheating is divided into two sections for II section by the grate hot-air system of the present invention, the heat smoke of different temperatures is passed through different
Pipeline and wind turbine are sent respectively to the I section of leading portion in down-draft drying zone and preheating, that is, reduce system converts cold blast rate, reduces main air inducing
The flow of machine also reduces the treating capacity of desulphurization system；The heat of back segment high-temperature flue gas is rationally utilized simultaneously, to I section of preheating
Concurrent heating is carried out, particularly when bloodstone is roasted（Bloodstone is to provide it by auxiliary burning nozzle burning in preheating section
Required heat and exhaust gas volumn）, can reduce preheating I section auxiliary burning nozzle fuel consumption；
（2）The grate hot-air system of the present invention mends blasting drying period discharge air using the hot-air of III section of ring cold machine
Heat not only prevents the exposure of mechanical equipment, most importantly carries out concurrent heating using hot-air, without adding for pernicious gas ingredient
Enter, the exhaust gas of blasting drying period can be directly discharged to by deduster in air；
（3）The grate hot-air system of the present invention is by the deflector hole on II section of ring cold machine and III section of partition wall of ring cold machine, by ring
Hot-air in II section of cold is blended into III section of ring cold machine, and the hot air temperature of III section of ring cold machine is improved on source, can be with
Less with or without Pipeline Heating Furnace, the consumption of fuel is not only saved, while decrease the discharge of pernicious gas.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
The specific embodiment further illustrated the present invention below in conjunction with the accompanying drawings.
As shown in Figure 1, the grate hot-air system of the present invention, including grate, the rotary kiln being connected with this grate
6, the ring cold machine being connected with this rotary kiln 6 connects the connecting pipe between the grate, rotary kiln 6 and ring cold machine, described
Grate include blasting drying period 1, down-draft drying zone 2, preheating I section 3 and preheating II section, the ring cold machine include ring cold machine
IV section 11 of I section 7, II section 8 of ring cold machine, III section 10 of ring cold machine and ring cold machine, it is characterised in that II section of the preheating includes preceding pre-
II section 5 of II section 4 of heat and rear preheating, it is described before mixing heat smoke in II section 4 of preheating by hot air duct I 12, be arranged on it is described
Deduster I 13 and backheat wind turbine I 14 on hot air duct I 12 are sent to the down-draft drying zone 2, are preheated in II section 5 after described
Mixing heat smoke pass through hot air duct II 15, the deduster II 16 being arranged on the hot air duct II 15 and backheat wind turbine II
17 send to I section 3 of the preheating,
III section 10 of the ring cold machine by hot air duct III 19, the drum dry-air blast machine 20 being arranged on the hot air duct III 19 with
The bellows of the blasting drying period 1 are connected, and the ring cold machine passes through hot air duct IV 18 and the forced air drying for III section 10
The upper cover of section 1 is connected, and ring cold machine III section of 10 design, two hot air ducts, hot-air is sent by two hot air ducts to chain respectively
In 1 bellows of grate apparatus for forced section and in the upper cover of blasting drying period 1.
Set that there are two deflector hole 21, deflector holes on the partition wall 9 between III section 10 of II section 8 of the ring cold machine and ring cold machine
21 a diameter of 750mm-850mm, high-temperature hot air（About 700 DEG C or so）Ring is entered for II 8 sections by ring cold machine by deflector hole 21
In III section 10 of cold.
II section 4 of the preceding preheating and rear II section of 5 length ratio of preheating are 1.5：1-2.5:1, optimal proportion 2：1.
It is equipped on the hot air duct I 12 and converts low temperature valve, convert low temperature valve according to different pelletizing burst temperatures come regulation pipe
Temperature in road.
It is set on the hot air duct IV 18 and at the thermocouple interlocking in the upper cover of the blasting drying period 1
There is an electric butterfly valve, the thermocouple in 1 upper cover of blasting drying period shows the temperature in 1 upper cover of blasting drying period, general temperature control
More than dew point.
Preheating is divided into two sections for II section by the grate hot-air system of the present invention, the heat smoke of different temperatures is passed through different
Pipeline and wind turbine are sent respectively to I section of 3 leading portion in down-draft drying zone 2 and preheating, that is, reduce system converts cold blast rate, are reduced master and are drawn
The flow of wind turbine also reduces the treating capacity of desulphurization system；The heat of back segment high-temperature flue gas is rationally utilized simultaneously, to preheating I
Section 3 carries out concurrent heating, particularly when bloodstone is roasted（Bloodstone is provided by auxiliary burning nozzle burning in preheating section
Its required heat and exhaust gas volumn）, can reduce preheating I section 3 auxiliary burning nozzle fuel consumption；It is in addition, of the invention
Air is discharged to blasting drying period 1 using III section 10 of hot-air of ring cold machine and carries out concurrent heating, not only prevents the exposure of mechanical equipment,
Concurrent heating most importantly is carried out using hot-air, without the addition of pernicious gas ingredient, the exhaust gas of blasting drying period 1 can pass through
Deduster is directly discharged in air；Furthermore grate hot-air system of the invention passes through in II section 8 of ring cold machine and ring cold machine III
Hot-air in II section 8 of ring cold machine is blended into III section 10 of ring cold machine, on source by the deflector hole 21 on the partition wall 9 of section 10
The hot air temperature that III section 10 of raising ring cold machine, can lack with or without Pipeline Heating Furnace, not only save the consumption of fuel, together
When decrease the discharge of pernicious gas.
Claims (5)
1. a kind of grate hot-air system, including grate, the rotary kiln being connected with this grate is connected with this rotary kiln
Ring cold machine, connect the connecting pipe between the grate, rotary kiln and ring cold machine, the grate includes forced air drying
II section of section, down-draft drying zone, I section of preheating and preheating, the ring cold machine include I section of ring cold machine, II section of ring cold machine, ring cold machine III
IV section of section and ring cold machine, it is characterised in that II section of the preheating preheats II section and rear II section of preheating, the preceding preheating including preceding
Mixing heat smoke in II section by hot air duct I, the deduster I being arranged on the hot air duct I and backheat wind turbine I send to
The down-draft drying zone, it is described after preheating II section in mixing heat smoke by hot air duct II, be arranged on the hot blast pipe
Deduster II and backheat wind turbine II on road II are sent to I section of the preheating,
III section of the ring cold machine passes through hot air duct III, the drum dry-air blast machine being arranged on the hot air duct III and the air blast
The bellows of dryer section are connected, and III section of the ring cold machine is connected by hot air duct IV with the upper cover of the blasting drying period
It connects,
Deflector hole there are two being set on partition wall between III section of II section of the ring cold machine and ring cold machine.
2. grate hot-air system according to claim 1, it is characterised in that II section of the preceding preheating preheats II with rear
Segment length ratio is 1.5:1-2.5:1.
3. grate hot-air system according to claim 1, it is characterised in that cold equipped with converting on the hot air duct I
Valve.
4. grate hot-air system according to claim 1, it is characterised in that on the hot air duct IV and be located at
Electric butterfly valve is equipped at thermocouple interlocking in the upper cover of the blasting drying period.
5. grate hot-air system according to claim 1, it is characterised in that a diameter of 750mm- of the deflector hole
850mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257409.XA CN108267009B (en) | 2018-03-27 | 2018-03-27 | Hot air system of chain grate machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257409.XA CN108267009B (en) | 2018-03-27 | 2018-03-27 | Hot air system of chain grate machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108267009A true CN108267009A (en) | 2018-07-10 |
| CN108267009B CN108267009B (en) | 2023-12-12 |
Family
ID=62777999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810257409.XA Active CN108267009B (en) | 2018-03-27 | 2018-03-27 | Hot air system of chain grate machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108267009B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068225A (en) * | 2019-06-05 | 2019-07-30 | 中冶北方（大连）工程技术有限公司 | A kind of grate upper cover hot-air system and temperature control method |
| CN110068224A (en) * | 2019-06-05 | 2019-07-30 | 中冶北方（大连）工程技术有限公司 | The off-gas recovery of grate down-draft drying zone and preheating section utilizes and exhaust system |
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| CN104831056A (en) * | 2015-03-17 | 2015-08-12 | 北京首钢国际工程技术有限公司 | Preheating and roasting method of chromium concentrate pellet |
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| CN207991270U (en) * | 2018-03-27 | 2018-10-19 | 中冶北方（大连）工程技术有限公司 | Grate hot-air system |
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| CN101817648A (en) * | 2010-04-27 | 2010-09-01 | 贾会平 | Method and equipment for calcining materials |
| KR20120084781A (en) * | 2010-08-18 | 2012-07-30 | 바오샨 아이론 앤 스틸 유한공사 | Process and system for calcining fine lime |
| CN102032797A (en) * | 2010-11-23 | 2011-04-27 | 北京世纪源博科技有限责任公司 | Enhanced heat exchange device for sinter of circular cooler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068225A (en) * | 2019-06-05 | 2019-07-30 | 中冶北方（大连）工程技术有限公司 | A kind of grate upper cover hot-air system and temperature control method |
| CN110068224A (en) * | 2019-06-05 | 2019-07-30 | 中冶北方（大连）工程技术有限公司 | The off-gas recovery of grate down-draft drying zone and preheating section utilizes and exhaust system |
| CN110068225B (en) * | 2019-06-05 | 2024-03-29 | 中冶北方（大连）工程技术有限公司 | Hot air system of upper cover of chain grate machine and temperature adjusting method |
| CN110068224B (en) * | 2019-06-05 | 2024-04-02 | 中冶北方（大连）工程技术有限公司 | Flue gas recycling and discharging system of air draft drying section and preheating section of chain grate machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108267009B (en) | 2023-12-12 |
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