CN106568331B - A kind of large size suspension kiln and its production technology - Google Patents
A kind of large size suspension kiln and its production technology Download PDFInfo
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- CN106568331B CN106568331B CN201610910437.8A CN201610910437A CN106568331B CN 106568331 B CN106568331 B CN 106568331B CN 201610910437 A CN201610910437 A CN 201610910437A CN 106568331 B CN106568331 B CN 106568331B
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- 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
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Abstract
The present invention relates to a kind of large-scale suspension kiln and its production technology, suspension kiln calcination system is made of multistage pre- hot cyclone separator, calcination reactor, intermediate separator and multistage cooling cyclone separator；Multistage pre- hot cyclone separator is divided into multigroup, and admission line, discharge duct in every group between pre- hot cyclone separator at different levels are to be connected in series with, and the air inlet of the pre- hot cyclone separator between group and group, discharge duct are to be connected in parallel；The cooling cyclone separator of multistage is divided into multigroup, air inlet, exhaust, charging and discharge pipe in every group between cyclone separator at different levels, which are all made of, to be connected in series with, and air inlet, exhaust, charging and the discharge pipe of the cooling cyclone separator between group and group, which are all made of, to be connected in parallel.The present invention is grouped using multiple small dimension cyclone separators, and simultaneously, the mode that is combined of series connection realize that the enlargement of suspension kiln effectively reduces the overall height of suspension kiln under the premise of ensuring separative efficiency, reduce system operation resistance, control is built and operating cost.
Description
Technical field
The present invention relates to cement and refractories industry suspension roasting kiln more particularly to a kind of large-scale suspension kiln and its
Production technology.
Background technology
Suspension roasting technology is widely used for the calcining technology of cement industry and refractories industry.With the hair of industry
Exhibition and science and technology progress, the continuous increase of industrial production scale, requirement of the manufacturing enterprise to furnace equipment specification, ability also by
Gradually improve.Therefore, the technological development of large-scale suspension kiln is trend of the times.
Suspension kiln calcination system is mainly by pre- hot cyclone separator, calcination reactor, intermediate separator and cooling whirlwind point
It is formed from device.It is to carry out ratio enlargement by the specification of existing small scale equipment according to the design custom of traditional large-scale kiln,
It rearranges again.But for suspension kiln, after multicyclone apparatus size increases, separative efficiency can be made to be declined, made
It is wasted at system energy.Gas pipeline between cyclone separators at different levels increases with equipment and is lengthened so that entire kiln system
Drag losses increase, and increase the power consumption of wind turbine.Since each equipment is arranged in a vertical direction in suspension kiln, kiln body and workshop are all very
Height, and the increase of equipment size can greatly increase the factory building height of suspension kiln, for super-high buildings, height often increases by one meter
Its construction cost can also increase considerably, therefore in large-scale suspension kiln development process, and it is that control is built rationally to control kiln body height
It is set as this key.
Invention content
The present invention provides a kind of large-scale suspension kiln and its production technologies, are grouped using multiple small dimension cyclone separators,
And simultaneously, the mode that is combined of series connection realize the enlargement of suspension kiln, under the premise of ensuring separative efficiency, effectively reduce and suspend
The overall height of kiln reduces system operation resistance, to control construction and operating cost.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of large size suspension kiln, the suspension kiln are removed by source material delivery system, calcination system, Finished Product Transport System and smoke evacuation
Dirt system forms；The calcination system is by multistage pre- hot cyclone separator, calcination reactor, intermediate separator and multistage cooling rotation
Wind separator group at；Wherein：
Multistage pre- hot cyclone separator is divided into multigroup, and every group is made of several pre- hot cyclone separators；Feedstock transportation
The feeding device of system is connect with the feed pipe before the pre- hot cyclone separator of level-one, the feed pipe of multistage pre- hot cyclone separator
Road is sequentially connected in series；And in every group pre- hot cyclone separator at different levels the feed pipe row with the pre- hot cyclone separator of next stage respectively
Feed channel connects；Drainage line in every group between cyclone separator at different levels is connected in series with, the exhaust of the pre- hot cyclone separator of each group
It is sequentially connected bag filter, induced-draft fan and chimney after pipe end parallel connection, intermediate separation is connected after admission line head end parallel connection
The smoke discharging pipe of device；
The cooling cyclone separator of multistage is divided into multigroup, and every group is made of several cooling cyclone separators；It is each in every group
Feed pipe and discharge pipe between the cooling cyclone separator of grade are to be connected in series with, and each cooling cyclone separator in every group
The feed pipe that discharge duct cools down cyclone separator with upper level respectively is connect, and final stage cooling cyclone separator goes out in every group
Pipe material is separately connected the discharging belt conveyer of Finished Product Transport System；The admission line connection of final stage cooling cyclone separator in every group
External cooling wind pipeline；In each group calcination reactor burner is connected after the discharge duct parallel connection of first order cooling cyclone separator
Secondary Air entrance；In each group the feed pipe of the cooling cyclone separator of the first order respectively with the discharge pipe of intermediate separator
Connection.
Flowmeter is set on admission line before every group of pre- hot cyclone separator, the first order preheats cyclonic separation in every group
Regulating valve is set on the discharge duct of device.
It is connected by inverted U pipeline between the calcination reactor and intermediate separator.
It is mounted on level-sensing device on the pre- hot cyclone separator, cooling cyclone separator, is respectively mounted back on discharge pipe
Turn discharge valve, thermometric, pressure instrumentation are respectively mounted on admission line and discharge duct.
A kind of production technology of large size suspension kiln, gas flows from bottom to top in system, is finally gone out by kiln top row；Material by
Kiln top is added, and flows from top to bottom, is finally discharged from kiln bottom；Material and gas are in counter-current flow in kiln；It specifically includes as follows
Step：
1) material is added by kiln top, after pre- hot cyclone separator preheatings at different levels, by the pre- hot cyclone separator of final stage
Discharge nozzle is flow in calcination reactor；
2) material after preheating enters in calcination reactor, and fuel passes through the burner infeed mounted on calcination reactor lower part
And it burns；Material comes into full contact with heat exchange with the flue gas that burning generates in calcination reactor, completes calcining；Flue gas drives material together
It flows up, intermediate separator is entered after inverted U pipeline；
3) after material enters intermediate separator completion cyclonic separation together with flue gas, material is multiple by intermediate separator bottom
Discharge nozzle branches in each group cooling cyclone separator；Heat smoke is diverted to each group preheating by intermediate separator smoke exhausting pipe at top road
In cyclone separator；
4) cooling air is pumped by system negative pressure in cooling cyclone separator, and material is in each group cooling cyclone separator
It is discharged after the cooling air eddy flow cooling in cooling cyclone separators at different levels, into Finished Product Transport System；Each group cools down whirlwind
After the cooling air cooling material of separator, finally summarize into calcination reactor, participates in burning as auxiliary air；
5) in system operation, the front and back pressure difference of cyclone separator is preheated/cooled down by adjusting valve regulation each group, is ensured
The gas flow for flowing through every group of preheating/cooling cyclone separator is consistent.
Compared with prior art, the beneficial effects of the invention are as follows：
1) by that will preheat, the grouping of cooling cyclone separator, so that the gas into each group cyclone separator is shunted, drop
Low gas flow, reduces the structure size of every grade of cyclone separator, the separative efficiency higher of the cyclone separator of small dimension,
And groups of small dimension cyclone separator can effectively reduce the overall height of suspension kiln；
2) it preheats, for air-flow to flow parallel, total pressure head is in each group cyclone separator between cooling cyclone separator each group
Maximum differential pressure rather than each group pressure difference summation, and the pressure difference of small dimension cyclone separator is smaller, therefore, groups of small rule in parallel
Lattice cyclone separator total pressure head smaller, system resistance are lower；
3) pre- hot cyclone separator uses the flowing heat transfer mode of high solid-gas ratio, therefore kiln discharge exhaust gas temperature is lower；
4) cooling cyclone separator uses the flowing heat transfer mode of low solid-gas ratio, therefore kiln discharge temperature of charge is lower.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of large-scale suspension kiln of the present invention.
Fig. 2 is a kind of dimensional structure diagram of large-scale suspension kiln of the present invention.
Fig. 3 is the instrumentation points distribution map of the pre- hot cyclone separator of single group.
In figure：The pre- hot cyclone separator 4.4# of the pre- hot cyclone separator 3.3# of the pre- hot cyclone separator 2.2# of 1.1# are pre-
Pre- 7. calcination reactor of hot cyclone separator, 8. intermediate separators of the pre- hot cyclone separator 6.6# of hot cyclone separator 5.5#
9.1# cools down cyclone separator 10.2# cooling cyclone separator 11.3# cooling cyclone separators 12.4# and cools down cyclonic separation
Device 13.5# cooling cyclone separator 14.6# cooling cyclone separator 15.7# cooling cyclone separators 16.8# cools down whirlwind
Separator 17.9# cooling cyclone separators 18. turn round 19. discharging belt conveyer of discharge valve, 20. regulating valve, 21. bag-type dust
24. feeding device of device 22. induced-draft fan, 23. chimney, 25. inverted U pipeline T1. temperature instrumentation P1. pressure instrumentation FT. flows
Count LA. level-sensing devices
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of large-scale suspension kiln of the present invention, the suspension kiln is by source material delivery system, calcining
System, Finished Product Transport System and smoke discharging dust removing system composition；The calcination system is by multistage pre- hot cyclone separator 1-6, calcining
Reactor 7, intermediate separator 8 and multistage cooling cyclone separator 9-17 compositions；Wherein：
Multistage pre- hot cyclone separator 1-6 is divided into multigroup, and every group is made of several pre- hot cyclone separators；Raw material is defeated
The feeding device 24 of system is sent to be connect with the feed pipe before the pre- hot cyclone separator of level-one, multistage pre- hot cyclone separator 1-6
Feed pipe be sequentially connected in series；And in every group pre- hot cyclone separator at different levels feed pipe respectively with next stage preheating whirlwind point
Discharge duct connection from device；Drainage line in every group between cyclone separator at different levels is connected in series with, and each group preheats cyclonic separation
Bag filter 21, induced-draft fan 22 and chimney 23 are sequentially connected after the discharge duct end parallel connection of device, admission line head end is in parallel
The smoke discharging pipe of intermediate separator 8 is connected afterwards；
The cooling cyclone separator 9-17 of multistage is divided into multigroup, and every group is made of several cooling cyclone separators；Every group
Feed pipe and discharge pipe between interior cooling cyclone separator at different levels are to be connected in series with, and each cooling cyclonic separation in every group
The feed pipe that the discharge duct of device cools down cyclone separator with upper level respectively is connect, and final stage cools down cyclone separator in every group
Discharge pipe be separately connected the discharging belt conveyer 19 of Finished Product Transport System；The air inlet pipe of final stage cooling cyclone separator in every group
The external cooling wind pipeline of road connection；In each group calcination reactor is connected after the discharge duct parallel connection of first order cooling cyclone separator
The Secondary Air entrance of 7 burners；In each group the feed pipe of the cooling cyclone separator of the first order respectively with intermediate separator 8
Discharge pipe connects.
Set flowmeter FT on admission line before every group of pre- hot cyclone separator, first order preheating whirlwind point in every group
From setting regulating valve 20 on the discharge duct of device.
It is connected by inverted U pipeline 25 between the calcination reactor and intermediate separator.
It is mounted on level-sensing device LA on the pre- hot cyclone separator, cooling cyclone separator, is respectively mounted on discharge pipe
Discharge valve 18 is turned round, thermometric, pressure instrumentation T1, P1 are respectively mounted on admission line and discharge duct.
A kind of production technology of large size suspension kiln, gas flows from bottom to top in system, is finally gone out by kiln top row；Material by
Kiln top is added, and flows from top to bottom, is finally discharged from kiln bottom；Material and gas are in counter-current flow in kiln；It specifically includes as follows
Step：
1) material is added by kiln top, after pre- hot cyclone separator 1-6 preheatings at different levels, by the pre- hot cyclone separator of final stage
6 discharge nozzle is flow in calcination reactor 7；
2) material after preheating enters in calcination reactor 7, and fuel passes through the burner confession mounted on 7 lower part of calcination reactor
Enter and burns；Material comes into full contact with heat exchange with the flue gas that burning generates in calcination reactor 7, completes calcining；Flue gas drives material
It flows up together, intermediate separator 8 is entered after inverted U pipeline 25；
3) after material enters the completion cyclonic separation of intermediate separator 8 together with flue gas, material is more by 8 bottom of intermediate separator
A discharge nozzle branches in each group cooling cyclone separator；Heat smoke is diverted to each group by 8 smoke exhausting pipe at top road of intermediate separator
In pre- hot cyclone separator；
4) cooling air is pumped by system negative pressure in cooling cyclone separator, and material is in each group cooling cyclone separator
It is discharged after the cooling air eddy flow cooling in cooling cyclone separators at different levels, into Finished Product Transport System；Each group cools down whirlwind
After the cooling air cooling material of separator, finally summarize into calcination reactor 7, participates in burning as auxiliary air；
5) in system operation, the front and back pressure difference that each group preheated/cooled down cyclone separator is adjusted by regulating valve 20, is protected
The gas flow that card flows through every group of preheating/cooling cyclone separator is consistent.
The computational methods of each specification of equipment size of suspension kiln calcination system are as follows：
1) suspension kiln systematic air flow is calculated according to suspension kiln yield, heat consumption, fuel value, according to material size, severe
And gas severe determines the Geldart-D particle flow velocity of material, and then determine 7 internal diameter of calcination reactor；It is forged according to material of different grain size
Residence time needed for burning, determine the height of calcination reactor 7.
2) according to system off gas amount and pre- hot cyclone separator 1-6 packet counts, determine every group of pre- hot cyclone separator into
Throughput, according to the air inlet operating mode of the pre- hot cyclone separator of suspension kiln, gas flow rate usually takes 18~25m/s, thereby determines that pre-
The inlet size of hot cyclone separator 1-6, pre- hot cyclone separator 1-6 use efficient cyclone separator, according to inlet size and
The proportionality coefficient of each section, it may be determined that the structure size of rest part.
3) according to cooling air quantity needed for the load of every group of cooling cyclone separator and temperature computation, cooling rotation is similarly acquired
The import of wind separator 9-17 and remaining structure size.
As shown in figure 3, being respectively mounted level-sensing device LA on cyclone separators at different levels, revolution discharge valve is respectively mounted on discharge pipe
18, according to material position situation in cyclone separators at different levels, suitably adjusts it and turn round the discharging speed of discharge valve 18.Admission line, row
Temperature instrumentation T1, pressure instrumentation P1 are respectively mounted in feed channel, it, can be true by detecting the inlet and outlet pressure of cyclone separators at different levels
Whether its fixed Gas-particle Flows are smooth, and fuel quantity, air capacity and feeding quantity can be suitably adjusted by temperature detection.
Flowmeter FT, the row of every group of most upper level cyclone separator are installed on the admission line of every group of pre- hot cyclone separator
It is mounted on regulating valve 20 in feed channel, the front and back pressure difference of the pre- hot cyclone separator of each group is adjusted by regulating valve 20, ensures stream
The gas flow for crossing the pre- hot cyclone separator of each group is consistent.
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment】
As shown in Figure 1 and Figure 2, in the present embodiment, (1#-6# is pre- for the pre- hot cyclone separators at different levels in suspension kiln calcination system
Hot cyclone separator) 3 groups are divided into, every group is made of 2 cyclone separators；The pre- hot cyclone separators of wherein 1# and 6# are one
Group, 2# and the pre- hot cyclone separators of 5# are one group, and 3# and the pre- hot cyclone separators of 4# are one group.Preheating whirlwind point at different levels in every group
It is to be connected in series with from admission line, the discharge duct between device, the admission line of the pre- hot cyclone separator between group and group, exhaust
Pipeline is to be connected in parallel.
Cooling cyclone separators at different levels are also divided into 3 groups, and every group is made of 3 cooling cyclone separators；Wherein 1#,
It is one group that 2#, 3#, which cool down cyclone separator, and it is one group that 4#, 5#, 6#, which cool down cyclone separator, and 7#, 8#, 9# cool down cyclone separator
It is one group.Admission line, discharge duct, feed pipe and discharge pipe in every group between cyclone separator at different levels are all made of series connection
Connection, admission line, discharge duct, feed pipe and the discharge pipe of the cooling cyclone separator between group and group are all made of simultaneously
Connection connection.
Material is sent into pre- 1 air inlets of hot cyclone separator of 1# by feeding device, with heat smoke in the pre- hot cyclone separators of 1#
Inward turning flow separation passes through the pre- hot cyclone separators 2~6 of 2#~6# successively after the pre- hot cyclone separator discharge nozzle discharges of 1#, complete
At preheating.Enter in calcination reactor 7 after preheating, heat exchange is come into full contact with the flue gas for generation of burning in calcination reactor, completes
Calcining.Fuel drives material together to upstream by the burner infeed mounted on calcination reactor lower part, the flue gas for generation of burning
It is dynamic, intermediate separator 8 is entered after inverted U pipeline.After material completes cyclonic separation with flue gas in intermediate separator 8,
Material is branched to by the multiple discharge nozzles in bottom in each group cooling cyclone separator again.Cooling rotation of the material of shunting in respective group
It cools down with cooling air eddy flow in wind separator, is discharged by discharging belt conveyer 19 after cooling cyclone separator coolings at different levels, into
Enter Finished Product Transport System.
Cooling air is pumped into each group by system negative pressure and cools down in cyclone separator, finally summarizes to enter after cooling material and forge
It burns in reactor, participates in burning as auxiliary air.Flue gas and material in calcination reactor after burning enter intermediate point together
From device, heat smoke is diverted to by intermediate separator smoke exhausting pipe at top road in the pre- hot cyclone separator of each group after cyclonic separation.Each
Summarize from after group inward eddy preheating and expel from kiln, through bag filter 21, induced-draft fan 22, air is emitted into from chimney 23.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of large size suspension kiln, the suspension kiln is by source material delivery system, calcination system, Finished Product Transport System and smoke evacuation dedusting
System forms；It is characterized in that, the calcination system by multistage pre- hot cyclone separator, calcination reactor, intermediate separator and
The cooling cyclone separator composition of multistage；Wherein：
Multistage pre- hot cyclone separator is divided into multigroup, and every group is made of several pre- hot cyclone separators；Source material delivery system
Feeding device connect with the feed pipe before the pre- hot cyclone separator of level-one, the feed pipe of multistage pre- hot cyclone separator according to
Secondary series connection；And in every group pre- hot cyclone separator at different levels the feed pipe exhaust pipe with the pre- hot cyclone separator of next stage respectively
Road connects；Drainage line in every group between cyclone separator at different levels is connected in series with, the discharge duct of the pre- hot cyclone separator of each group
It is sequentially connected bag filter, induced-draft fan and chimney after the parallel connection of end, intermediate separator is connected after admission line head end parallel connection
Smoke discharging pipe；
The cooling cyclone separator of multistage is divided into multigroup, and every group is made of several cooling cyclone separators；It is at different levels cold in every group
But the feed pipe between cyclone separator and discharge pipe are and are connected in series with, and in every group each cooling cyclone separator exhaust
The feed pipe that pipeline cools down cyclone separator with upper level respectively is connect, the discharge nozzle of final stage cooling cyclone separator in every group
Road is separately connected the discharging belt conveyer of Finished Product Transport System；The admission line connection of final stage cooling cyclone separator is external in every group
Cooling wind pipeline；In each group the two of calcination reactor burner is connected after the discharge duct parallel connection of first order cooling cyclone separator
Secondary wind entrance；The feed pipe of the cooling cyclone separator of the first order connects with the discharge pipe of intermediate separator respectively in each group
It connects.
2. a kind of large-scale suspension kiln according to claim 1, which is characterized in that before every group of pre- hot cyclone separator
It sets flowmeter on admission line, regulating valve is set on the discharge duct of the pre- hot cyclone separator of the first order in every group.
3. a kind of large-scale suspension kiln according to claim 1, which is characterized in that the calcination reactor and intermediate separator
Between connected by inverted U pipeline.
4. a kind of large-scale suspension kiln according to claim 1, which is characterized in that the pre- hot cyclone separator, cooling rotation
It is mounted on level-sensing device on wind separator, revolution discharge valve is respectively mounted on discharge pipe, is pacified on admission line and discharge duct
Fill thermometric, pressure instrumentation.
5. a kind of production technology of large-scale suspension kiln according to claim 1, which is characterized in that in system gas from it is lower to
Upper flowing is finally gone out by kiln top row；Material is added by kiln top, is flowed from top to bottom, is finally discharged from kiln bottom；Material and gas exist
It is in counter-current flow in kiln；Specifically comprise the following steps：
1) material is added by kiln top, after pre- hot cyclone separator preheatings at different levels, by the discharging of the pre- hot cyclone separator of final stage
Pipe is flow in calcination reactor；
2) material after preheating enters in calcination reactor, and fuel is fed and fired by the burner mounted on calcination reactor lower part
It burns；Material comes into full contact with heat exchange with the flue gas that burning generates in calcination reactor, completes calcining；Flue gas drives material upward together
Flowing, intermediate separator is entered after inverted U pipeline；
3) after material enters intermediate separator completion cyclonic separation together with flue gas, material is by the multiple dischargings in intermediate separator bottom
Pipe branches in each group cooling cyclone separator；Heat smoke is diverted to each group by intermediate separator smoke exhausting pipe at top road and preheats whirlwind
In separator；
4) cooling air is pumped by system negative pressure in cooling cyclone separator, and material is in each group cooling cyclone separator through each
It is discharged after cooling air eddy flow cooling in the cooling cyclone separator of grade, into Finished Product Transport System；Each group cools down cyclonic separation
After the cooling air cooling material of device, finally summarize into calcination reactor, participates in burning as auxiliary air；
5) in system operation, the front and back pressure difference of cyclone separator is preheated/cooled down by adjusting valve regulation each group, ensures to flow through
The gas flow of every group of preheating/cooling cyclone separator is consistent.
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| CN108046282A (en) * | 2017-12-12 | 2018-05-18 | 瑞泰科技股份有限公司 | A kind of method for calcinating of kaolin superfine powder |
| CN110327708B (en) * | 2019-08-02 | 2021-08-31 | 浙江蓝天除尘设备有限公司 | Series multi-mode bag-type dust collector |
| CN112661422B (en) * | 2021-01-27 | 2024-02-06 | 辽宁荣邦科技有限公司 | Energy-saving flash suspension kiln system |
| CN112939002B (en) * | 2021-01-28 | 2023-01-31 | 天津水泥工业设计研究院有限公司 | Flexibly-adjustable high-activity metakaolin preparation system and preparation method |
| CN112944901B (en) * | 2021-01-28 | 2022-11-08 | 天津水泥工业设计研究院有限公司 | Suspension calcining modification furnace capable of reducing height and heat recovery system |
| CN112897542B (en) * | 2021-01-28 | 2022-12-13 | 天津水泥工业设计研究院有限公司 | Process and device for low-temperature rapid calcination modification of kaolin |
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