CN207894257U - Heat exchange shaft kiln - Google Patents
Heat exchange shaft kiln Download PDFInfo
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- CN207894257U CN207894257U CN201820090355.8U CN201820090355U CN207894257U CN 207894257 U CN207894257 U CN 207894257U CN 201820090355 U CN201820090355 U CN 201820090355U CN 207894257 U CN207894257 U CN 207894257U
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Abstract
This technology, which provides, to carry out heat exchange to the material of different grain size size, the continuous blanking of energy, flue gas resistance is small, effective stock column height height can be adjusted, nothing gets stuck, material leakage, the heat exchange shaft kiln of Air Leakage, including cylinder, on cylinder top, feeding device and exhaust apparatus are set, in cylinder lower part, device for discharging is set, cylinder at least one abrupt-change cross section between feeding device and device for discharging, size is smaller in the horizontal direction for the cylinder lumen on abrupt-change cross section top, size is larger in the horizontal direction for the cylinder lumen of the abrupt-change cross section lower part, when material flows downward, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part；The supply air line outlet that the gas medium of heat exchange is carried out with material is communicated with cavity.As preheater in use, it further includes smoke-box, tremie pipe and rotary kiln, the import of supply air line is communicated with smoke-box, and rotary kiln exhaust end is communicated with smoke-box；The outlet of device for discharging is attached across the tremie pipe of smoke-box, is communicated with rotary kiln feed end.
Description
Technical field
This technology is related to the heat exchange shaft kiln that can material preheated or is heated or cooled, and is preheated especially with waste heat
The preheater of material.
Background technology
Existing hydraulic push rod type vertical preheater is to push material to carry out under interval by moving repeatedly for hydraulic push rod
Material is entered by transporting slot in rotary kiln, while the high-temperature tail gas of rotary kiln is entered by transporting slot in preheater, to preheater
Material preheated.Heat resistance concrete " bridge " above hydraulic push rod is due to for a long time in high temperature, the ring of compression (lime stone)
It under border, is often easily damaged or even collapses, the phenomenon that material leakage easily occur.Hydraulic push rod is easy to get stuck simultaneously, leaks out serious.And
Since transhipment slot available ventilation sectional area is small, high-temperature tail gas flowing velocity is fast, and system resistance is big, effective bed of material in preheater
It highly relatively low (about 2000mm) and cannot adjust, the material that granularity is 20-50mm can only be preheated, it especially cannot be to 1-
The small particles material of 15mm preheats.High-temperature tail gas enters the flue gas that preheater is carried out with material after heat exchange and passes through in rotary kiln
The flue-gas temperature being discharged at the top of preheater often 380 DEG C of ＞, heat utilization rate is relatively low.Because flue-gas temperature is higher, needed before dedusting
Setting up cooler to flue gas or mixing cold wind reduces flue-gas temperature, requires the type selecting of deduster and air-introduced machine big after mixing cold wind, increases
The investment of sack cleaner and air-introduced machine, also increases power consumption and the cost of production run.
Invention content
The purpose of this technology is to provide a kind of simple structure, can carry out heat exchange to the material of different grain size size, especially
It is to be suitable for the small material that granularity is 1-15mm, can continuous blanking, flue gas resistance is small, and effective stock column height is high and can root
Be adjusted according to material size, without get stuck, the heat exchange shaft kiln of material leakage, Air Leakage, this heat exchange shaft kiln may be used as plus
Either dry or preheating material is also used as cooling material to heat.As preheater in use, discharge flue-gas temperature is low, it is not necessarily to
Cooling i.e. dust removal is carried out to discharge flue gas.
Heat exchange shaft kiln described in this technology, including cylinder are arranged on cylinder top for dosing material into cylinder
Feeding device and exhaust apparatus for tail gas to be discharged, in cylinder lower part, discharging of the setting for material in cylinder to be discharged fills
It sets, at least one abrupt-change cross section of the cylinder between feeding device and device for discharging, the cylinder lumen on the abrupt-change cross section top
Size is smaller in the horizontal direction, and size is larger in the horizontal direction for the cylinder lumen of the abrupt-change cross section lower part, material in cylinder to
When lower flowing, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part；For conveying heat exchange is carried out with material
Gas medium supply air line outlet communicated with the cavity.There are many constructions of the abrupt-change cross section, as long as material is in cylinder
When flowing downward, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part.There are many devices for discharging, only
Want the unloader that can control flow that can bear high-temperature material that can use.
As being further improved to the heat exchange shaft kiln, feeding device includes charge pipe and distributing device；Distributing device
Outlet end for up-small and down-big bullet or plate column structure, charge pipe is located at cylinder top center, and and cylinder
Inside communicates, and distributing device is located at the lower section of charge pipe outlet；When charging, material is formd below distributing device to be arrived naturally
The non-material area reached forms the space that material cannot reach naturally in cylinder top peripheral.Preferably, feeding device is relative to cylinder
It moves up and down.
As being further improved to the heat exchange shaft kiln, in cylinder, between feeding device and device for discharging also
Tripper is set；The tripper is up-small and down-big bullet or plate column structure, and using tubular axis as symmetry axis axis pair
Claim；The non-material area that material cannot reach naturally is formd below tripper, the bottom end mounting height of tripper is less than gas supply
Tube outlet.
As being further improved to the heat exchange shaft kiln, exhaust apparatus includes the space phase with cylinder top peripheral
Logical fume pipe, the fume pipe with deduster, air-introduced machine, chimney by being connected.
As being further improved to the heat exchange shaft kiln, it further includes smoke-box, tremie pipe and rotary kiln, the confession
The import of air pipe is communicated with smoke-box, and rotary kiln exhaust end (i.e. rotary kiln tail end) is communicated with smoke-box；The device for discharging goes out
Mouth is attached across the tremie pipe of smoke-box, is communicated with rotary kiln feed end (i.e. rotary kiln tail end).The heat exchange shaft kiln is one at this time
Kind vertical preheater and rotary kiln exhaust gas UTILIZATION OF VESIDUAL HEAT IN shaft kiln.
The advantageous effect of this technology：
1. material is entered by charge pipe in cylinder, due to having distributing device below charge pipe, so rectangular under distributing device
At the non-material area 21 of not material；Due to the presence of charge pipe, also forming material in cylinder top peripheral cannot arrive naturally
The space 22 reached.
Due to the setting of distributing device, cavity structure and tripper, communicated in the mixing of empty intracavity gas, pressure is equal
, so the high-temperature flue-gas being easily achieved in cavity is equal；When high-temperature flue gas rises through material bed from cavity, reach
The stroke approximately equal of the horizontal cross-section high-temperature flue gas of the same height, the material resistance approximately equal encountered, so high in kiln
Warm flue gas is similar to isobaris surface in the section of sustained height, and high-temperature flue gas is easy to close in same height section flow and flow rate
Patibhaga-nimitta etc. uniformly requires to realize temperature.
Similarly, due to the setting of distributing device, cavity structure and tripper, the material of sustained height horizontal cross-section is gone downwards to
Up to cavity and tripper apart from approximately equal, mutually squeezing that stress is approximate consistent, the speed of materials downward is approximate consistent,
Therefore, the biography received heat approximately equal of material and flue gas heat exchange, to realize uniformity, the consistency of material heat exchange,
There is basic guarantee to material heat exchange product quality.
2. material forms the distribution of taper slope surface shape in tripper, tripper controls the bed of material of material taper slope surface shape distribution
Thickness, the speed or material of material the downlink residence time in furnace chamber body are then controlled by device for discharging, this is just more advantageous to
Ensure the quality of heat exchange product.
Obviously, the flue-gas temperature highest in cavity, the environment temperature highest residing for tripper taper slope surface material, high temperature
Flue gas rise through it is material bed after, material local environment temperature is minimum at distributing device.Since (1) vertical effective capacity of kiln is big, leads to
Wind area is big, and air velocity is low；(2) resistance is not generated substantially to flue gas when the material of tripper taper slope surface is heated；(3) discharging
Device continuous discharge, so the continuous downward movement of material in heat exchange shaft kiln, movement material ratio stands resistance of the material to air-flow
It greatly reduces.So the resistance of the shaft kiln is low, the height of stock column, the inventory bigger and heat exchanger time of heat exchange can be improved
It is longer, to improve the efficiency of heat exchange.As preheater in use, the exhaust temperature of flue gas is preheated than conventional hydraulic push rod
Device is low.It is reached in the cavity 23 formed at abrupt-change cross section by the gas medium that supply air line is sent into, is used as preheater
When, material is heated not only through heat radiation mode with material, also extends through the bed of material directly by mainly being handed over advection heat with material
It changes mode to heat material, so material heating is abundant.The cavity 23 formed at the same abrupt-change cross section can be one or more
A, a plurality of cavities circumferentially can be connected to form an annular.
3. feeding device is moved up and down relative to cylinder, thus it is possible to vary the height of material in cylinder, to adapt to different-grain diameter
Material.The more relatively large material of geometric dimension, smaller to the resistance of air-flow, the time of heat transfer and mass transfer inside material needs
It grows, the relatively small material of geometric dimension is just big to the resistance of air-flow, and the time of heat transfer and mass transfer inside material needs
It is shorter.Therefore, to meet the requirement of materialbeds comminution and heat exchange, for large-sized material, charge pipe and distributing device relative to
The position of cylinder can be higher, and material is with regard to more in such cylinder.For the material of small particle, charge pipe and distributing device phase
Can be lower for the position of cylinder, material just lacks in such cylinder.Although in this way, large-sized material specific surface area
It is small, but stock column is high (bed of material is thick in other words) in cylinder, and heat exchanger time is long；Although small particle material large specific surface area, cylinder
Interior stock column is low (bed of material is thin in other words), and heat exchanger time is short, can reach and need heat exchange effect.The heat exchange shaft kiln is used as
When preheater, the material stock column height of preheating is 3 times of conventional hydraulic push-down vertical preheater up to 6 meters or more, and material heat is handed over
The time changed is also 3 times of conventional pre-heater, and can be adjusted according to the needs the height of stock column, is adapted to 1-80mm differences
The material (traditional necessary 20mm or more materials) of grain size section.
4. when using rotary kiln exhaust gas waste-heat material, rotary kiln passes through smoke-box, tremie pipe, supply air line and preheater
Linking, the high-temperature tail gas of rotary kiln enter preheater by smoke-box, supply air line；Under material in preheater passes through after being preheated
Expects pipe enters in rotary kiln；Transhipment slot discharge port of the available ventilation sectional area of supply air line than hydraulic push rod type vertical preheater
Sectional area (discharge port is also air inlet) is big many, and the high-temperature tail gas of rotary kiln enters that preheater is more unimpeded, and crushing is low, preheating
Effect is good, and the thermal efficiency is high, therefore kiln type yield higher on year-on-year basis.
5. when as preheater, the flue-gas temperature of discharge is relatively low, generally at 180-240 DEG C or so, with conventional hydraulic
Push rod preheater is compared, and the investment of multitube cooler is eliminated；Also, due to changing air leakage phenomena, deduster, air-introduced machine and
The configuration specification of its motor about reduces 30%, to reduce equipment investment, reduces operating cost and power consumption.
6. common hydraulic push rod vertical preheater, material just moves when hydraulic push rod resting period sexual act, preheater
Resistance it is big, stock column height cannot be high, and the time of heat exchange is shorter, and exhaust emissions temperature is relatively high, leaks out serious, system is thrown
Provide bigger, the failure rate of equipment is also relatively high, and operating cost is relatively high, and the application is as a kind of continuously vertical pre- without push rod
Hot device, without the operation component, reliable for operation such as hydraulic push rod, failure rate is low, the service life of mechanical equipment and refractory material is big
It is big to extend.The refractory material of main part ensures that 10 years nothings need to change.Material after preheating is controllable by heat safe feeder
In the quantitative and even feeding rotary kiln of system, moving component is few, thus failure greatly reduces.
7. refractory material description is few, conveniently build by laying bricks or stones and repair and maintenance.
8. since effective capacity of kiln bigger is found in heat exchange, time of heat exchange more fully, without air leakage phenomena and
Smog discharge temperature is lower, so the thermal efficiency of the present invention greatly improves.
9. the material kind and its geometry that adapt to are in extensive range, 20-50mm lump materials are not only adapted to, also may be used
To adapt to 1-15mm small particles materials；Product variety is adaptable, lime stone, lime, burnt dolomite, blast furnace granulated slag, semi-coke,
The nonmetal mineral products such as coke, the metallic mineral products such as iron ore are all suitable for；
10. the instrument such as corresponding temperature, pressure, flow, gas componant, high temperature TV, metering are arranged in heat exchange vertical kiln system
And valve, PLC, it is easy to realize automation, intellectualized operation.
Description of the drawings
Fig. 1 is a kind of front view of vertical preheater (cylinder lumen on abrupt-change cross section top is taper)；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the front view of another vertical preheater (cylinder lumen on abrupt-change cross section top is straight tube shape)；
Fig. 4 be the various vertical preheaters of third front view (cylinder lumen on abrupt-change cross section top be taper, tripper,
Distributing device is plate)；
In figure, feeding chamber 1, charge pipe 2, fume pipe 3, rotary kiln 4, cylinder 5, distributing device 6, smoke-box 7, supply air line 8,
Tripper 9, supporting leg 10, tremie pipe 11, the cylinder lumen 12 on abrupt-change cross section top, the cylinder lumen 13 of abrupt-change cross section lower part unload
Material mouth 14, high-temperature material feeder 15, material-level detecting device 16, temperature sensor 17, material 18, non-material area 21, space 22 are empty
Chamber 23, dead zone 24, suspension cable or sunpender 25.
Specific implementation mode
For ease of illustration facilitate, now using preheater as illustrating case.It is used to carry out lime stone referring to described in Fig. 1,2
Feeding chamber 1 from material 18 to cylinder, charge pipe 2 and distributing device for dosing is arranged in the vertical preheater of preheating, 5 top of cylinder
6.Two material-level detecting devices 16 of detection height are provided on feeding chamber 1.The outlet end of charge pipe is located at cylinder top center
Position, and with communicated in cylinder, distributing device be located at charge pipe outlet lower section.Charge pipe 2 can stretch relative to cylinder
To change length (being equivalent to charge pipe can move up and down relative to cylinder).Distributing device 6 is up-small and down-big bullet, is passed through
Suspension cable or sunpender 25 are suspended at the top of upper shell, can adjust suspension cable or sunpender 25 to change distributing device relative to the upper and lower of cylinder
Then position rigidly fixes again.
In the middle part of cylinder between distributing device and high-temperature material feeder, there are one abrupt-change cross section, the abrupt-change cross section tops
Cylinder lumen 12 size is smaller in the horizontal direction, size is larger in the horizontal direction for the cylinder lumen 13 of the abrupt-change cross section lower part,
When material flows downward in cylinder, the sky that material cannot reach naturally is formed below abrupt-change cross section, at inner barrel periphery
Chamber 23.There are many constructions for forming abrupt-change cross section, as long as material flows downward in cylinder, under abrupt-change cross section, in cylinder
The cavity that material cannot reach naturally is formed at portion periphery.For example, under the cylinder lumen 12 on abrupt-change cross section top can be
Up big and down small taper (as Figure 1 and Figure 4) is held, can also be straight tube shape (such as Fig. 3).When 12 lower end of cylinder lumen is taper,
The heat exchange for being conducive to air-flow and material is more uniform.
Shown in Fig. 1, Fig. 4, there is the dead zone 24 being connected with cavity 23 above abrupt-change cross section, is conducive to increase in this way
The volume of cavity 23.
The tail end of lime rotary kiln 4 stretches into a smoke-box 7, and the import of supply air line 8 is communicated with smoke-box, supply air line 8
Outlet is communicated with the cavity 23 at abrupt-change cross section.Present case supply air line is 2, and the outlet of supply air line is circumferentially uniform in cylinder
Distribution.The discharge port 14 of cylinder body bottom connects high-temperature material feeder (device for discharging) 15, and the outlet of high-temperature material feeder 15 passes through
Tremie pipe 11 across smoke-box is extend into the tail end of rotary kiln 4.
Tripper 9 is also set up in cylinder, between feeding device and device for discharging, which is up-small and down-big taper
Body, and using tubular axis as symmetry axis axial symmetry；The bottom end mounting height of tripper is less than the outlet of supply air line 8, by solid
The supporting leg 10 being scheduled on cylinder supports.
Material is entered by feeding chamber, charge pipe in cylinder, due to having distributing device below charge pipe, so under distributing device
Side forms the non-material area 21 of not material；Due to the presence of charge pipe, also forming material in cylinder top peripheral cannot be certainly
The space 22 so reached；Periphery at the top of upper shell is connected with fume pipe 3.Fume pipe 3 is communicated with space 22, and and dedusting
Device, air-introduced machine, chimney are connected.On supply air line 8 and it is provided with temperature sensor 17 at the top of cylinder, detection is respectively used to and supplies
The temperature of high-temperature tail gas in air pipe 8 and the flue-gas temperature of discharge.
The application is one kind continuously without push rod vertical preheater.When preheater is run, the material in feeding chamber 1 passes through charging
Pipe 2 is added in preheater, is drawn off from discharge port 14 by high-temperature material feeder, then enters rotary kiln 4 by tremie pipe 11
It is interior.Under the action of air-introduced machine, out of, the high-temperature tail gas of rotary kiln discharge enters rotary kiln smoke-box 7, pass through gas supply
Pipeline 8 enters in preheater, and after material heat exchange, the fume pipe 3 by being connected with deduster, air-introduced machine is discharged.
The main distinction of vertical preheater shown in Fig. 4 and vertical preheater shown in Fig. 1 is：Tripper 9 in Fig. 4 is
Hollow platy structure, 9 mounting height of tripper are less than the outlet of supply air line；Distributing device 6 is platy structure.
The application and the main distinction of conventional hydraulic push rod vertical preheater are as follows.The application without push rod preheater,
Not only the thermal efficiency greatly improves, but also reliable for operation, can be owner save writing investment, can also substantially reduce operation at
This.
The comparison of two kinds of preheaters：
。
Claims (6)
1. heat exchange shaft kiln, including cylinder are arranged the feeding device for dosing material into cylinder on cylinder top and are used for
The exhaust apparatus that tail gas is discharged, device for discharging of the setting for material in cylinder to be discharged in cylinder lower part, it is characterized in that：
Cylinder at least one abrupt-change cross section between feeding device and device for discharging, the cylinder lumen on the abrupt-change cross section top is in level
Direction size is smaller, and size is larger in the horizontal direction for the cylinder lumen of the abrupt-change cross section lower part, and material flows downward in cylinder
When, the cavity that material cannot reach naturally is formed at abrupt-change cross section lower part；For conveying the gas for carrying out heat exchange with material
The supply air line outlet of medium is communicated with the cavity.
2. heat exchange shaft kiln as described in claim 1, it is characterized in that：Feeding device includes charge pipe and distributing device；Distributing device
Outlet end for up-small and down-big bullet or plate column structure, charge pipe is located at cylinder top center, and and cylinder
Inside communicates, and distributing device is located at the lower section of charge pipe outlet；When charging, material is formd below distributing device to be arrived naturally
The non-material area reached forms the space that material cannot reach naturally in cylinder top peripheral.
3. heat exchange shaft kiln as claimed in claim 2, it is characterized in that：Feeding device is moved up and down relative to cylinder.
4. heat exchange shaft kiln as described in claim 1, it is characterized in that：In cylinder, between feeding device and device for discharging also
Tripper is set；The tripper is up-small and down-big bullet or plate column structure, and using tubular axis as symmetry axis axis pair
Claim；The non-material area that material cannot reach naturally is formd below tripper, the bottom end mounting height of tripper is less than gas supply
Tube outlet.
5. heat exchange shaft kiln as claimed in claim 2, it is characterized in that：Exhaust apparatus includes the space phase with cylinder top peripheral
Logical fume pipe, the fume pipe with deduster, air-introduced machine, chimney by being connected.
6. heat exchange shaft kiln as described in claim 1, it is characterized in that：It further includes smoke-box, tremie pipe and rotary kiln, the confession
The import of air pipe is communicated with smoke-box, and rotary kiln exhaust end is communicated with smoke-box；The outlet of the device for discharging is attached across smoke-box
Tremie pipe, communicated with rotary kiln feed end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820090355.8U CN207894257U (en) | 2018-01-18 | 2018-01-18 | Heat exchange shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820090355.8U CN207894257U (en) | 2018-01-18 | 2018-01-18 | Heat exchange shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207894257U true CN207894257U (en) | 2018-09-21 |
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ID=63545325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820090355.8U Active CN207894257U (en) | 2018-01-18 | 2018-01-18 | Heat exchange shaft kiln |
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| CN (1) | CN207894257U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050855A (en) * | 2018-01-18 | 2018-05-18 | 南京苏冶钙业技术有限公司 | Heat exchange shaft kiln |
-
2018
- 2018-01-18 CN CN201820090355.8U patent/CN207894257U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050855A (en) * | 2018-01-18 | 2018-05-18 | 南京苏冶钙业技术有限公司 | Heat exchange shaft kiln |
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