CN105174257B - A kind of Kun formulas multiple temperature sections continuous production tunnel kiln - Google Patents
A kind of Kun formulas multiple temperature sections continuous production tunnel kiln Download PDFInfo
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Abstract
The present invention provides a kind of Kun formulas multiple temperature sections continuous production tunnel kiln, including kiln body, atmosphere system, the rollgang for passing through kiln body internal furnace, temperature measuring equipment；Rollgang is used to convey reactant container；Kiln body internal furnace is provided with hearth inner lining, and conveying direction of the burner hearth along reactant container is divided into five areas：Burner air-tight section, preheating zone, heating zone, air-cooled area and water cooling and furnace exhaust gas Mi Qu.The present invention drives reactant container to advance by speed set in advance in burner hearth by the rotation of Kun rods during the course of the reaction, reaches the purpose of successive reaction, not only ensure that the performance of product, also improve production efficiency；The present invention reaches reaction and carried out under an inert atmosphere, avoid the oxidation of material by the control of burner, the air curtain device of stove tail and atmosphere system；Pass through movement of the reactant container in kiln, it is not necessary to heating and cooling are carried out to body of heater every time, so as to reduce energy consumption, reduce production cost.
Description
Technical field
The present invention relates to a kind of Kun formulas multiple temperature sections continuous production tunnel kiln.
Background technology
React for the atmosphere of high temperature, often carried out in kiln.
Such as alkali activation manufacture activated carbon.Alkali activation manufacture activated carbon is typically up to using charcoal or carbide raw material
Multiple temperature sections activation is carried out at a high temperature of 800 more than oC in the presence of the alkali such as potassium hydroxide, sodium hydroxide, obtains specific surface area
Higher activated carbon.Alkali is in fused salt state during due to activation, and must carry out under an inert atmosphere, so to activation equipment
Requirement it is higher, main activation equipment is to press one using closed disposable charging activation, i.e. carbon feedstock and solid base at present
After fixed ratio mixing, it is put into activating container, activating container is pushed into bogie furnace or other heating furnaces, by activating process
It is required that carrying out multiple temperature sections heating, stop heating after activation, activating container is taken out heating furnace after the cooling of certain time.This
The discrete disposable activation method of kind, need to cool to equipment in each discharging, heating is reheated after charging, not only
Mass energy is wasted, and automaticity is poor, and production efficiency is extremely low, while also as the operation of heating and cooling can not be done
To every time it is identical, influence the uniformity and stability of product quality.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of Kun formulas multiple temperature sections continuous production tunnel kiln, both can guarantee that
The execution strictly according to the facts of reaction, ensure the quality of product, moreover it is possible to ensure the efficient and inexpensive of production process.Therefore, the present invention uses
Following technical scheme：
A kind of Kun formulas multiple temperature sections continuous production tunnel kiln, it is characterised in that described device includes kiln body, atmosphere system
Rollgang, the temperature measuring equipment unite, passed through kiln body internal furnace；
Rollgang is used to convey reactant container；
The kiln body internal furnace is provided with hearth inner lining, conveying direction of the burner hearth along reactant container
It is divided into five areas：Burner air-tight section, preheating zone, heating zone, air-cooled area and water cooling and furnace exhaust gas Mi Qu；
The burner air-tight section has the first inert gas seal region in kiln body entrance, in the first inert gas
Sealing area, blown by inert gas and form gas curtain, prevent gaseous exchange inside and outside stove；
The preheating zone provides heat by the heat radiation of heating zone downstream and material is preheated；
Electrical heating elements are provided with the heating zone；
Preheating zone, heating zone kiln body above be respectively provided with exhaust outlet.
The air-cooled area is provided with air inlet duct and exhausting duct, and air inlet duct is configured with air blower；
The water cooling and furnace exhaust gas Mi Qu have water-cooling jacket, and the water cooling and furnace exhaust gas Mi Qu export in kiln body
Place has the second inert gas seal region, in the second inert gas seal region, is blown by inert gas and forms gas curtain, prevents
Gaseous exchange inside and outside stove, also improves cooling effect.
On the basis of using above-mentioned technical proposal, the present invention can also use technical scheme further below：
Conveying direction of the heating zone along reactant container be divided into the first heating region, second plus
Three thermal region, the 3rd heating region heating regions；The temperature controlling range of first heating region is 400 oC-550 oC；The
The temperature controlling range of two heating regions is 600 oC-700 oC；The temperature controlling range 800oC-900 o of second heating region
C；Each heating region is provided with the electrical heating elements matched with temperature controlling range, and first heating region, second add
Thermal region, the 3rd heating region have its temperature measuring equipment and temperature regulating device respectively.
The kiln body has stainless steel double layer jacket structure in air-cooled area, is provided with ventilation duct in chuck, air passes through
Ventilation duct enters air-cooled area from air-cooled area bottom, and the hot-air by heat exchange is discharged from the top portion ventilation road in air-cooled area.
The kiln body is provided with furnace shell, and the furnace shell is connected and composed using the steel plate of multistage bending and molding, steel plate sectional
Place uses sealing welding, angle cleat side thickness 8-10mm between section and section, using bolt-connection, silicon is lined between two steel plates
Rubber slab, again with silica gel putty-painting in seam crossing after connection, it is ensured that the air-tightness of whole body of heater.
The hearth inner lining is located at both sides and top inside burner hearth, is made of thickness 2-3mm 310S stainless steel plates, respectively
Connection transition piece is provided between the inner liner stainless steel plate in section, ensures stainless steel plate free wxpansion in transition piece, and burner hearth
The globality of liner.
The kiln is provided with heat insulation layer in preheating zone and heating zone, and the heat insulation layer is from outside to inside by fibre
The poly- light brick layer of vinylon and cotton blend layer, ceramic fiberboard, mullite is formed.
Stainless steel guide rail ring is provided with the Kun rods of roller-way, for control reactant container in kiln body according to
Rectilinear movement.
The electrical heating elements are using the outer silk heating tube of ceramics, and it is spirally wound on high aluminum pipe by high temperature resistance silk, so
Cover insulation porcelain tube afterwards, finally it is placed in stainless steel seal pipe；To the wiring of electrical heating elements one side, heating in the heating zone
Do sealed wiring chamber in kiln body one side at area.
The atmosphere system includes nitrogen air intake apparatus, and flow is controlled by flowmeter；Burner air-tight section and furnace exhaust gas Mi Qu
Respectively have all the way that inlet channel is connected with nitrogen air intake apparatus, liquidated nitrogen by left and right in burner air-tight section and furnace exhaust gas Mi Qu gas curtain
Gas forms gas curtain；Preheating zone, heating zone and the air cooling zone of body of heater respectively set nitrogen inlet, using burner hearth bottom air inlet, but
It is that airintake direction is downward in burner hearth, each air inlet pipe is provided with flow controller.
Rollgang is divided into multiple moving cells according to the functional areas in burner hearth, and each moving cell uses independent change
Frequency motor ensures that each moving cell speed is adjustable by driving.
Due to using technical scheme, the present invention passes through the rotational band of the Kun rods of rollgang during the course of the reaction
Dynamic reactant container advances by speed set in advance in burner hearth, reaches the purpose of successive reaction, not only ensure that production
The performance of product, also improves production efficiency；The present invention is reached by the control of burner, the air curtain device of stove tail and atmosphere system
Reaction is carried out under an inert atmosphere, avoids the oxidation of material；Pass through movement of the reactant container in kiln, it is not necessary to every
It is secondary that heating and cooling are carried out to body of heater, so as to reduce energy consumption, reduce production cost.
Brief description of the drawings
Fig. 1 is the sectional schematic diagram of apparatus of the present invention.
Fig. 2 is the vertical structure schematic diagram of apparatus of the present invention.
Position and numbering in Fig. 1：1：Heat insulation layer；2:Stove outer covering；3:Hearth inner lining；4：Heating tube；5:Kun rods；6:Become
Frequency motor；7:Thermometer；8：Pallet；9:Guide rail ring；10：Reactant container；11：Air inlet pipe；12：Blast pipe.
Position and numbering in Fig. 2：1：Heat insulation layer；2:Stove outer covering；3:Hearth inner lining；4：Heating tube；5:Kun rods；8：Support
Disk； 10：Reactant container；11：Air inlet pipe；12：Blast pipe；13：Each intersegmental connecting elements of body of heater（13-1：Connect steel
Plate, 13-2：Silica gel plate, 13-3：Bolt）；14：First gas curtain tracheae；15；Second gas curtain tracheae；16：Flowmeter；17：Indifferent gas
Body pipe；18：Cooling air pipe；19：Cooling water inlet.
Specific embodiment
Referring to the drawings.Kun formulas multiple temperature sections continuous production tunnel kiln provided by the present invention includes kiln body, atmosphere system
Rollgang, the temperature measuring equipment 7 unite, passed through kiln body internal furnace.
Rollgang is used to convey reactant container 10；
The kiln body is provided with furnace shell 2, heat insulation layer 1, hearth inner lining 3, is described as follows：
The furnace shell 2 is connected and composed using the steel plate of bending and molding thick multistage 4-5mm, and sealing welding is used at segmentation,
Angle cleat side thickness 8-10mm between section and section, coupled using bolt 13-3, silicane rubber plate is lined between two steel plate 13-1
13-2, again with silica gel putty-painting in seam crossing after connection, it is ensured that the air-tightness of whole body of heater.
The hearth inner lining 3 is located at both sides and top inside burner hearth, using thickness 2-3mm 310S stainless steel plate systems
Into, connection transition piece is provided between the inner liner stainless steel plate in each section, ensures stainless steel plate free wxpansion in transition piece, and
The globality of hearth inner lining.Burner hearth is ensured under the conditions of continuous high temperature, prevents thermal insulation furnace body insulating layer material by corrosive degradation, with
And product quality will not be influenceed because of dust.
The heat insulation layer 1 is from outside to inside by certain thickness cellucotton layer, ceramic fiberboard, the poly- light brick of mullite
Layer is formed, it is ensured that the heat-resisting and heat-insulating property of body of heater.The heat insulation layer 1 is between hearth inner lining 3 and furnace shell 2.
The kiln is provided with heat insulation layer 1 in preheating zone and heating zone, the heat insulation layer 1 be in furnace shell and
Between hearth inner lining 3, it is made up of from outside to inside cellucotton layer, ceramic fiberboard, the poly- light brick layer of mullite.
The Kun rods 5 of the rollgang are made of the х 15 of Φ 100 310S stainless steel tubes, every pipe safety load-bearing about 40
㎏, 2 symmetrical stainless steel guide rail rings 9 are provided with certain position in each Kun rod, the guide rail ring holds appearance with reactant
The angle steel of the bottom of pallet 8 of the lower section of device 10 matches（Reference picture 1）, it is ensured that reactant container 10 moves in stove according to straight line
It is dynamic；
Electrical heating elements in burner hearth are spirally wound on high aluminum pipe using the outer silk heating tube 4 of ceramics by high temperature resistance silk
On, then cover insulation porcelain tube, is finally placed in stainless steel seal pipe；Electrical heating elements one side is connect in the heating zone
Sealed wiring chamber is done in line, the kiln body one side at heating zone.
Temperature measuring equipment 7 uses K-type thermocouple, is arranged at the centre position of each temperature section, sets height as alignment material
Center section.
Conveying direction of the kiln body internal furnace of the present invention along reactant container 10 is divided into five areas：Burner
Air-tight section, preheating zone, heating zone, it is air-cooled go and water cooling and furnace exhaust gas Mi Qu, be described as follows：
The burner air-tight section has the first inert gas seal region in kiln body entrance, in the first inert gas
Sealing area, gas curtain is formed by 14 outside blown inert gas of the first gas curtain pipe, prevents gaseous exchange inside and outside stove；First indifferent gas
The length of body sealing area is depending on air-tightness requires, generally 1m-1.2m.
Heating tube is not set in the preheating zone, material is preheated by the heat radiation of heating zone below, preheating zone
Length is depending on the rotating speed of Kun rods, generally 1m-1.2m.
Conveying direction of the heating zone along reactant container 10 is divided into the first heating region, second
Three heating region, the 3rd heating region heating regions.The temperature controlling range 400oC-550oC of first heating zone, length are
7.5m-8.5m；The temperature controlling range 600oC-700oC of second heating zone, length about 7.5m-8.5m；The temperature of second heating zone
Spend control range 800oC-900oC, length about 5m-6m；Each heating region is provided with the electricity matched with temperature controlling range
Heating element heater.
The air-cooled area is provided with air inlet duct and exhausting duct, and air inlet duct is configured with air blower；Air-cooled area uses 316 stainless steels
Double layer jacket structure, ventilation duct 18 is provided with chuck, air enters in ventilation duct from bottom, and the hot-air by heat exchange is from leading to
Discharged at the top of airduct, be externally provided with air blower in air inlet, area's overall length is 5m-6m.
The water cooling and furnace exhaust gas Mi Qu have water-cooling jacket, overall length 5m-6m, and cooling water enters stainless steel water from bottom
Cold chuck 19, the hot water by heat exchange are discharged at the top of chuck, and inflow has flowmeter and Valve controlling.And the water cooling is simultaneous
Furnace exhaust gas Mi Qu has the second inert gas seal region in kiln body entrance, in the second inert gas seal region, leads to
Cross 15 outside blown inert gas of the second gas curtain pipe and form gas curtain, prevent gaseous exchange inside and outside stove, meanwhile, the opposite reaction of high velocity air
The blow-through of thing container 10, also improves cooling effect.
The atmosphere system is 12 road nitrogen air intake apparatus, and flow, accompanying drawing are controlled by the flowmeter 16 being arranged on outside stove
Label 17 is nitrogen inlet manifold.Burner air-tight section and furnace exhaust gas Mi Qu respectively have air inlet pipeline all the way and nitrogen air intake apparatus, point
Not Yong Yu sealing gland, formed using several air curtains for liquidating of left and right, can effectively prevent the entrance of outside air.In burner hearth
Preheating zone, three heating regions and air cooling zone respectively set two-way nitrogen inlet 11, are connected with nitrogen air intake apparatus；Using stove
Thorax bottom inflow, but airintake direction is downward in burner hearth, each air inlet pipe is provided with flow controller.In the upper of each warm area of kiln
Side, provided with blast pipe 12, the gas in stove is discharged, handled in outdoor.
Rollgang, into six moving cells, is burner air-tight section unit and preheating respectively according to the function distinguishing in burner hearth
Area's unit, the first heating region unit, the second heating region unit, the 3rd heating region unit, air-cooled area's unit and water cooling
And the close area's unit of furnace exhaust gas, each moving cell are driven using independent variable-frequency motor 6, ensure that each moving cell speed can
Adjust, and pass through helical gear passing power.
So, the control of temperature, the control of speed can be passed through（Convey the speed of reactant container 10）To control
Reaction process processed, without the size by changing burner hearth, there is more preferable flexibility.
The control system of the present invention possesses following characteristics：
（1）The regulation of single loop intelligent temperature uses digital display functional control instrument temperature control with control, and instrument is with manually and certainly
Dynamic PID regulations, optimal pid value can be set from motion tracking, while there is temperature-compensating, overtemperature, the disconnected sound and light of alarm such as even；
（2）Temperature control mode is phase shift trigger for thyristor, and 0~98% power output can adjust, and have overtemperature alarm dress
Put；
（3）Temperature control instrument has the disconnected even instruction alarm and protection function of high temperature upper limit alarm, thermocouple；
（4）All control systems are all arranged in electrical control cabinet；
（5）By three heating zones, totally ten two temperature sections form for overall heating zone, are grouped power by A.C. contactor respectively, this
Sample can reduce equipment to be impacted to the transient current of power network, and each temperature section has a set of independent thermometric, temperature-controlling system and temperature
Overtemperature alarm system, detect respectively, control respective temperature section, and when overheating problem occurs for some temperature section temperature, corresponding temperature section
Temperature overtemperature alarm system send sound and light alarm signal immediately, the corresponding temperature section warning light on panel is lighted, buzzer
Send interrupted alarm；
（6）Protection system is conveyed with reactant container, alarm will be provided during failure.
Below by way of activated carbon alkali activation example, the invention will be further described.
By activating process requirements, the Kun rod rotating speeds in each warm area temperature and each area are set, motor power Kun rods is opened and rotates,
The switch of the air inlet in each area including air-tight section is opened, controls inert gas（Nitrogen）Flow, open air-cooled area
Air blower and the cooling water valve in water cooling area.
Weigh the material of constant weight（Carbon feedstock and solid potassium hydroxide mix by a certain percentage）Reactant is put into hold
In container 10, reactant container 10 is placed in the pallet 8 on the guide rail ring 9 for being enclosed on Kun rods 5, it is anti-under the drive of Kun rods
Thing container 10 is answered to enter in burner hearth.Reactant container 10 passes through each warm area heat-activated, finally by air-cooled area and
Kiln is left after the cooling in water cooling area, completes activation.Work reactant container 10 equipped with material can enter one by one
Enter kiln, complete activation, reach the purpose continuously activated.
Below by way of activated carbon surface oxygen-containing group processing example, the invention will be further described.
By handling process requirements, the Kun rod rotating speeds in each warm area temperature and each area are set, motor power Kun rods is opened and rotates,
The switch of the air inlet in each area including air-tight section is opened, controls the flow of high-purity nitrogen, opens the air blast in air-cooled area
Machine and the cooling water valve in water cooling area.
The activated carbon for weighing constant weight is put into reactant container 10, and reactant container 10 is placed in set
In pallet 8 on the guide rail ring 9 of Kun rods 5, reactant container 10 enters in burner hearth under the drive of Kun rods.Reactant is held
Container 10 heats by each warm area, and kiln is finally left after the cooling in air-cooled area and water cooling area, completes at oxygen-containing group
Reason.Work reactant container 10 equipped with material can enter kiln one by one, reach the purpose of continuous processing.
By adjusting the rotating speed of each warm area Kun rods, material in reactant container at such a temperature anti-can be controlled
Between seasonable, meet the requirement of technique；, can be with the cooling degree of control material by adjusting air-cooled area and water cooling area Kun rod rotating speeds.
By designing the height and width of kiln burner hearth, to determine the size of each reactant container so as to reach production
The control of energy.
The continuous production tunnel kiln device, the shortcomings that production efficiency that overcomes existing apparatus is poor, power consumption is big, pass through
Kun axles（Kun rods）Rotation drive reactant container advance by the speed of setting in burner hearth, reach the mesh of continuous processing
, the performance of product is not only ensure that, also improves production efficiency.Pass through burner, the air curtain device of stove tail and atmosphere system
Control, reach reaction and carry out under an inert atmosphere, avoid the oxidation of material.Pass through shifting of the reactant container in kiln
It is dynamic, it is not necessary to heating and cooling are carried out to body of heater every time, so as to reduce energy consumption, reduce production cost.Automatically controlled by control system
The temperature of each warm area and material ensure the execution strictly according to the facts of reaction process in the holdup time of each warm area.
Claims (9)
1. a kind of Kun formulas multiple temperature sections continuous production tunnel kiln, it is characterised in that the tunnel kiln includes kiln body, atmosphere
System, the rollgang for passing through kiln body internal furnace, temperature measuring equipment；
Rollgang is used to convey reactant container；
The kiln body internal furnace is provided with hearth inner lining, and conveying direction of the burner hearth along reactant container is divided
For five areas：Burner air-tight section, preheating zone, heating zone, air-cooled area and water cooling and furnace exhaust gas Mi Qu；
The burner air-tight section has the first inert gas seal region in kiln body entrance, in the first inert gas seal
Region, blown by inert gas and form gas curtain, prevent gaseous exchange inside and outside stove；
The preheating zone provides heat by the heat radiation of heating zone downstream and material is preheated；
Electrical heating elements are provided with the heating zone；
Preheating zone, heating zone kiln body above be respectively provided with exhaust outlet；
The air-cooled area is provided with air inlet duct and exhausting duct, and air inlet duct is configured with air blower；
The water cooling and furnace exhaust gas Mi Qu have water-cooling jacket, and the water cooling and furnace exhaust gas Mi Qu have in kiln body exit
There is the second inert gas seal region, in the second inert gas seal region, blown by inert gas and form gas curtain, prevent in stove
Outer gaseous exchange, also improves cooling effect.
A kind of 2. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the heating zone edge
The conveying direction for reactant container is divided into the first heating region, the second heating region, the 3rd heating region three
Individual heating region；The temperature controlling range of first heating region is 400 DEG C -550 DEG C；The temperature controlling range of second heating region
For 600 DEG C -700 DEG C；800 DEG C -900 DEG C of the temperature controlling range of second heating region；Each heating region is provided with and temperature
The electrical heating elements of control range matching are spent, first heating region, the second heating region, the 3rd heating region have it respectively
Temperature measuring equipment and temperature regulating device.
A kind of 3. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the kiln body
Outer surface is provided with furnace shell, and the furnace shell is connected and composed using the steel plate of multistage bending and molding, and sealing welding is used at steel plate sectional,
Angle cleat side thickness 8-10mm between section and section, using bolt-connection, is lined with silicane rubber plate, is used again after connection between two steel plates
Silica gel putty-painting is in seam crossing, it is ensured that the air-tightness of whole body of heater.
A kind of 4. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the hearth inner lining
Be located at both sides and top inside burner hearth, be made of thickness 2-3mm 310S stainless steel plates, the inner liner stainless steel plate in each section it
Between be provided with connection transition piece, ensure stainless steel plate free wxpansion in transition piece, and the globality of hearth inner lining.
5. a kind of Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the kiln is pre-
Be provided with heat insulation layer in hot-zone and heating zone, the heat insulation layer from outside to inside by cellucotton layer, ceramic fiberboard,
The poly- light brick layer of mullite is formed.
6. a kind of Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that in the Kun rods of roller-way
Stainless steel guide rail ring is provided with, for controlling reactant container in kiln body according to rectilinear movement.
A kind of 7. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the electrical heating member
Part is using the outer silk heating tube of ceramics, and it is spirally wound on high aluminum pipe by high temperature resistance silk, and then cover insulation porcelain tube, finally puts
Put in stainless steel seal pipe；To the wiring of electrical heating elements one side in the heating zone, the kiln body one side at heating zone is done
Sealed wiring chamber.
A kind of 8. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that the atmosphere system
Including nitrogen air intake apparatus, flow is controlled by flowmeter；Burner air-tight section and furnace exhaust gas Mi Qu respectively have inlet channel all the way and nitrogen
Gas air intake apparatus is connected, and gas curtain is formed by the left and right nitrogen that liquidates in burner air-tight section and furnace exhaust gas Mi Qu gas curtain；Body of heater it is pre-
Hot-zone, heating zone and air cooling zone respectively set nitrogen inlet, and using burner hearth bottom air inlet, but airintake direction is in burner hearth
Downwards, each air inlet pipe is provided with flow controller.
A kind of 9. Kun formulas multiple temperature sections continuous production tunnel kiln as claimed in claim 1, it is characterised in that rollgang according to
Functional areas in burner hearth are divided into multiple moving cells, and each moving cell, by driving, is ensured using independent variable-frequency motor
Each moving cell speed is adjustable.
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| CN105174257A (en) | 2015-12-23 |
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