CN206572848U - A kind of device for drying carbon black - Google Patents
A kind of device for drying carbon black Download PDFInfo
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- CN206572848U CN206572848U CN201720225154.XU CN201720225154U CN206572848U CN 206572848 U CN206572848 U CN 206572848U CN 201720225154 U CN201720225154 U CN 201720225154U CN 206572848 U CN206572848 U CN 206572848U
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- carbon black
- heat exchanger
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- blade dryer
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Abstract
The utility model is related to carbon black production technology field, purpose is to provide a kind of device for drying carbon black, the device for drying carbon black, including reducing-and-cooling plant, blade dryer, air heat exchanger, cyclone dust collectors, sack cleaner, air-introduced machine and hot air heat exchanger, blade dryer is provided with material toggling part and feeding screw, material toggling part is provided with exhaust outlet, the discharge directions of exhaust outlet and the blanking direction of feeding screw are into 60 °~90 °, blade dryer is provided with offgas outlet, reducing-and-cooling plant respectively with blade dryer, air heat exchanger is connected with hot air heat exchanger, offgas outlet, cyclone dust collectors, sack cleaner and air-introduced machine are sequentially connected, hot air heat exchanger is connected with sack cleaner.The beneficial effects of the utility model are：The superheated steam of exhaust outlet discharge makes wet carbon black become loose, and mobility is stronger；Tail gas supplements part hot-air before sack cleaner is entered, it is to avoid sack cleaner pastes bag.
Description
Technical field
The utility model is related to carbon black production technology field, more particularly to a kind of device for drying carbon black.
Background technology
The technique for preparing carbon black is a lot, such as oven process, spray-on process, lamp black method, channel process, cracking process, acetylene method and plasma
Method, raw material used mainly has ethylene bottom oil, coal tar, Catalytic Cracking Residual Oil etc..Currently, the present situation of China's production of carbon black is former
Material is short, product stability is poor, technology ＆ equipment level is backward, scope of the enterprise is small, production capacity is low.In recent years, in
State's carbon black industry has been carried out with larger-scale unit, the technology-intensive technological transformation being characterized, to reduce the consumption of fuel oil.
Petrochemical industry heavy oil (residual oil) gas processed is to produce one at high temperature using heavy oil (or residual oil), oxygen, steam as raw material
Carbonoxide and hydrogen, are generated with certain carbon black waste residue.To avoid generation environment from polluting, petrochemical industry is made to heavy oil (residual oil)
The carbon black waste residue that gas process is produced generally takes washing, the method for filtering to separate it from system, and carbon black waste residue is passed through
High-performance conductive carbon black products can be turned into by crossing after drying, so that turn waste into wealth, the consumption of fuel oil when greatling save production carbon black.
The drying plant of current wet carbon black generally uses roller and blade dryer, using between exhaust combustion or saturated vapor
Connect heating to be dried, but find in production, during being dried to high moisture content carbon black, obtained carbon black finished product is easily tied
Block, moisture content are uneven, carbon black structure is destroyed, have a strong impact on carbon black mass.Therefore, how to improve carbon black products quality is drying
During key issue.
Utility model content
The purpose of this utility model is to overcome drawbacks described above, and there is provided a kind of drying efficiency is high, carbon black products quality is good
Device for drying carbon black.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of device for drying carbon black, including reducing-and-cooling plant, blade dryer, air heat exchanger, cyclone dust collectors, cloth
Bag dust collector, air-introduced machine and hot air heat exchanger, the feed end of the blade dryer are provided with material toggling part and feeding screw, institute
Material toggling part is stated provided with exhaust outlet, the feed opening of the exhaust outlet correspondence feeding screw is set, the exhaust side of the exhaust outlet
Set to the blanking direction with feeding screw is angled, the angle ranging from 60 °~90 °, the blade dryer is provided with tail
Gas is exported, and the reducing-and-cooling plant is connected with blade dryer, air heat exchanger and hot air heat exchanger respectively, and the tail gas goes out
Mouth, cyclone dust collectors, sack cleaner and air-introduced machine are sequentially connected, the outlet of the hot air heat exchanger and entering for sack cleaner
Mouth is connected.
The beneficial effects of the utility model are：Wet carbon black is transported to blade dryer by feeding screw, by
Flash distillation is dispelled by the superheated steam discharged on the exhaust outlet of material toggling part before the extruding that chain-drive section is dried to blade and one is lost
Divide moisture, make carbon black loose, improve the mobility of carbon black, while residence time of the wet carbon black in drying chain-drive section is reduced,
Carbon black caking is avoided, extrudes and destroys carbon black structure, the drying efficiency for improving carbon black also improves carbon black products quality；Flash distillation is dry
Carbon black after dry is by the drying of blade dryer, and the moisture evaporated is carried over tail after being heated through air heat exchanger with hot-air
Gas is exported, and into later stage tail gas treatment stage, reduces the pollution to environment；Tail gas passes through heat before sack cleaner is entered
Wind heat exchanger is heated to outside cold air, supplements a part of hot-air, by exhaust temperature control on dew point, it is to avoid
Sack cleaner paste bag, is easy to the collection of carbon black in cyclone dust collectors and sack cleaner.
Brief description of the drawings
Fig. 1 is that (arrow represents corresponding gas in figure for the top view of the utility model embodiment device for drying carbon black structure chart
The flow direction of body, condensed water or carbon black).
Fig. 2 is the front view of the blade dryer of the utility model embodiment device for drying carbon black.
Label declaration：
1- reducing-and-cooling plants；2- blade dryers；3- cyclone dust collectors；4- sack cleaners；5- air-introduced machines；6- hot blasts
Heat exchanger；7- material toggling parts；8- feeding screws；9- air heat exchangers；10- offgas outlets；11- flashes mouthful；12- condensate drainings；
13- feed openings；14- star-shaped discharge valves；The valves of 15- first；The valves of 16- second；The valves of 17- the 3rd；The valves of 18- the 4th；21- shells
Body；22- blades；71- steel pipes；72- exhaust outlets.
Embodiment
To describe technology contents of the present utility model, construction feature, the objects and the effects in detail, below in conjunction with implementation
Mode simultaneously coordinates accompanying drawing to be explained in detail.
The design of the utility model most critical is：The mistake that carbon black is discharged before not dried on the exhaust outlet of material toggling part
Vapours dispels flash distillation, improves the mobility of carbon black；A part of hot-air is supplemented to tail gas by hot air heat exchanger, it is to avoid
Sack cleaner pastes bag.
Refer to Fig. 1-2, the device for drying carbon black of the present embodiment, including reducing-and-cooling plant 1, blade dryer 2, air
Heat exchanger 9, cyclone dust collectors 3, sack cleaner 4, air-introduced machine 5 and hot air heat exchanger 6, the feed end of the blade dryer 2
Material toggling part 7 and feeding screw 8 are provided with, the material toggling part 7 is provided with exhaust outlet 72, the correspondence of the exhaust outlet 72 spiral charging
The feed opening 13 of device 8 is set, the discharge directions of the exhaust outlet 72 and the angled setting in the blanking direction of feeding screw 8, institute
Angle is stated for 60 °~90 °, the blade dryer 2 is provided with offgas outlet 10, the reducing-and-cooling plant 1 respectively with blade
Dryer 2, air heat exchanger 9 are connected with hot air heat exchanger, the offgas outlet 10, cyclone dust collectors 3, the and of sack cleaner 4
Air-introduced machine 5 is sequentially connected, and the outlet of the hot air heat exchanger 6 is connected with the import of sack cleaner 3.
The course of work of the present utility model is：Superheated steam is passed through into reducing-and-cooling plant 1, superheated steam subtracts in desuperheat
It is changed into the high 0.7Mpa of heat exchanger effectiveness, 165 DEG C of saturated vapor after the pressure and temperature reducing effect of pressure device 1.Saturated vapor is divided into
Three tunnels are connected with blade dryer 2, air heat exchanger 9 and hot air heat exchanger 6 respectively by pipeline；Into in blade dryer 2
Saturated vapor be used for the wet carbon black of indirectly heat；Saturated vapor in air inlet heat exchanger 9, which is used to heat, enters blade drying
Air in machine 2；It is used for the air that heat external enters in hot air heat exchanger 6 into the saturated vapor in hot air heat exchanger 6, heat
Air is used to supplement air to sack cleaner 4, it is to avoid the paste bag of sack cleaner 4；Material toggling part 7 is passed through overheat by pipeline and steamed
Vapour, superheated steam is discharged by the exhaust outlet 72 on material toggling part 7, for being delivered to feeding screw 8 in blade dryer 2
Carbon black is steamed so that carbon black is dispelled by superheated steam and becomes fluffy.
During wet carbon black is delivered to blade dryer 2 from feeding screw 8, it can be crossed on material toggling part 7 be vented first
The superheated steams of the discharge of mouth 72 are dispelled, and wet carbon black loses portion of water during directly being contacted with superheated steam, so that
So that wet carbon black becomes more fluffy, mobility is stronger, it is to avoid extruding of the head of blade dryer 2 to wet carbon black；By dialling
The wet carbon black of preliminarily dried continues forward with blade dryer 2 after materials and parts 7, and by saturated vapor in blade dryer 2
Indirectly heat, after the moisture that wet carbon black is evaporated is heated through air heat exchanger 9, with tail gas of the hot-air by blade dryer 2
Blade dryer 2 is taken in outlet 10 out of；Wet carbon black after stay long enough, reaches set in advance in blade dryer 2
Blade dryer 2 is flowed out by the flash mouthful 11 of blade dryer 2 after moisture, into packaging area.
The all gas that wet carbon black is produced in drying course, including wet carbon black evaporate a small amount of water vapour, overheat steam
Steam, hot-air and the part of entrainment carbon black that vapour is produced etc. is referred to as tail gas.Tail gas passes through pipeline in the presence of air-introduced machine 5
Into cyclone dust collectors 3, a part of carbon black is removed；The exhaust temperature come out from cyclone dust collectors 3 can reduce a part, to avoid
Sack cleaner 4 pastes bag, and before sack cleaner 4 is entered, one is supplemented by the cold air of the heat external of hot air heat exchanger 6
Part hot blast is into tail gas, it is ensured that the temperature of tail gas is at 115-125 DEG C.Tail gas is further removed after entering sack cleaner 4
Carbon black therein, reaches after dust emission standard, passes through 20m high chimney emission.
It was found from foregoing description, the beneficial effects of the utility model are：Wet carbon black is transported to by feeding screw
During blade dryer, the overheat discharged before the extruding of chain-drive section is dried by blade on the exhaust outlet of material toggling part
Steam is dispelled, and during directly being contacted with superheated steam, loses portion of water, is made carbon black loose, is become more fluffy
Pine, mobility is stronger, while reducing residence time of the wet carbon black in drying chain-drive section, it is to avoid carbon black lumps, extrudes and destroy
Carbon black structure, improves the drying efficiency of carbon black, also improves carbon black products quality；Carbon black after preliminarily dried is dried by blade
The contact drying of machine, the moisture evaporated is carried over offgas outlet after being heated through air heat exchanger with hot-air, into later stage tail
In the gas disposal stage, reduce the pollution to environment；After tail gas enters cyclone dust collectors and sack cleaner in the presence of air-introduced machine,
It is collected into a part of superior in quality carbon black；Tail gas is before sack cleaner is entered, by hot air heat exchanger to the cold of outside
Air is heated, and supplements a part of hot-air to sack cleaner, by exhaust temperature control on dew point, it is to avoid cloth
Bag dust collector pastes bag, is easy to the collection of carbon black in cyclone dust collectors and sack cleaner.
Further, the material toggling part 7 is a steel pipe 71, and one end of the steel pipe 71 is connected with outside pipeline, described
The other end of steel pipe 71 is the closing mouth of pipe, and the exhaust outlet 72 is set along the axis direction parallel to steel pipe 71.
Further, the material toggling part 7 is arranged on the lower section of feeding screw 8, and the material toggling part 7 is fed perpendicular to spiral
Device 8 is set, and the distance between the material toggling part 7 and feeding screw 8 is 8-10cm.
Further, the length of the exhaust outlet 72 and the feed opening 13 of feeding screw 8 are parallel to the axis of steel pipe 71
Equal length or the length of exhaust outlet 72 are more than length of the feed opening 13 parallel to the axis of steel pipe 71 of feeding screw 8.
Seen from the above description, exhaust outlet is set along the parallel axis direction with steel pipe, and the length of exhaust outlet is more than etc.
In feeding screw feed opening parallel to the length of steel pipe axis, set while material toggling part is vertical with the feed opening of feeding screw
Put so that the superheated steam of exhaust outlet discharge is vertical with the wet carbon black discharged from feed opening, it is ensured that wet carbon black and superheated steam
Fully contact, the contact area of wet carbon black and superheated steam is maximum, and drying efficiency is high.
Further, it is described to be provided with the first valve 15 with material toggling part 7.
Seen from the above description, the amount of superheated steam in material toggling part is entered by the first Valve controlling, so as to control exhaust
The temperature of the superheated steam of mouth discharge, makes temperature control not destroy the temperature of carbon black structure.
Further, the blade dryer 2 includes setting respectively on blade 22 and housing 21, the blade 22 and housing 21
There is chuck, the reducing-and-cooling plant 1 is connected by pipeline with blade 22 and housing 21.
Seen from the above description, it is passed through into the chuck on blade and housing and carries out pressure and temperature reducing work through reducing-and-cooling plant
Saturated vapor after, contact drying, the heat exchange effect of saturated vapor and carbon black are carried out to the carbon black entered in blade dryer
Rate is maximum, improves carbon black drying efficiency.
Further, in addition to condensate draining 12, the desuperheat water inlet phase of the condensate draining 12 and reducing-and-cooling plant 1
Even, the condensate draining 12 is connected with the condensing water conduit of blade dryer 2, hot air heat exchanger 6 and air heat exchanger 9.
Seen from the above description, the condensation that blade dryer, hot air heat exchanger and air heat exchanger are produced after heat exchange
Water is all back in condensate draining by connected condensing water conduit respectively, and the condensed water of whole system is back to use desuperheat and subtracted
Pressure device, as the moisturizing of reducing-and-cooling plant, recycles water resource, accomplishes that the energy makes full use of.
Further, the reducing-and-cooling plant 1 by pipeline respectively with blade dryer 2, air heat exchanger 9 and hot blast
Heat exchanger 6 is connected, on the pipeline between the reducing-and-cooling plant 1 and blade dryer 2, air heat exchanger 9 and hot air heat exchanger 6
It is respectively equipped with the second valve 16, the 3rd valve 17 and the 4th valve 18.
Seen from the above description, by the second valve, the 3rd valve and the 4th valve can realize respectively to blade dryer,
The amount for the saturated vapor being passed through in air heat exchanger and hot air heat exchanger is controlled, so as to control blade dryer, air to change
Temperature in hot device and hot air heat exchanger.
Further, the bottom of the cyclone dust collectors 3 and sack cleaner 4 is respectively equipped with star-shaped discharge valve 14.
Seen from the above description, star-shaped discharge valve is a kind of performance stabilization, simple and efficient conveying equipment, is unloaded by star-like
Material valve is realized carries out discharging to the carbon black collected in cyclone dust collectors and sack cleaner, simple to operate, it is easy to accomplish.
Fig. 1-2 is refer to, embodiment one of the present utility model is：
A kind of device for drying carbon black, including reducing-and-cooling plant 1, blade dryer 2, air heat exchanger 9, cyclone dust collectors
3rd, sack cleaner 4, air-introduced machine 5 and hot air heat exchanger 6, the feed end of the blade dryer 2 are provided with material toggling part 7 and spiral
Feeder 8, the material toggling part 7 is provided with exhaust outlet 72, and the feed opening 13 of the correspondence of exhaust outlet 72 feeding screw 8 is set,
The discharge directions of the exhaust outlet 72 and the angled setting in the blanking direction of feeding screw 8, the angle ranging from 60 °~90 °, institute
Material toggling part 7 is stated for a steel pipe 71, one end of the steel pipe 71 is connected with outside pipeline, the other end of the steel pipe 71 is closing
The mouth of pipe, the steel pipe 71 passes through the feed opening 13 of feeding screw 8, and the length of the steel pipe 71 is 420mm, a diameter of 32mm,
The feed opening 13 of the feeding screw 8 is the cuboid of upper and lower opening, and the size of opening is 400 × 300mm, the exhaust outlet
72 are set along the axis direction parallel to steel pipe 71, and the material toggling part 7 is arranged on the lower section of feeding screw 8, the material toggling part 7
Set perpendicular to feeding screw 8, the distance between the material toggling part 7 and feeding screw 8 is 10cm, the length of the exhaust outlet 72
Degree and the equal length of the feed opening 13 of feeding screw 8 parallel to the axis of steel pipe 71, as 400mm or 300mm, the blade
Dryer 2 be provided with offgas outlet 10, the reducing-and-cooling plant 1 respectively with blade dryer 2, air heat exchanger 9 and hot blast
Heat exchanger is connected, and the offgas outlet 10, cyclone dust collectors 3, sack cleaner 4 and air-introduced machine 5 are sequentially connected, and the hot blast is changed
The outlet of hot device 6 is connected with the import of sack cleaner 3.
It refer to shown in Fig. 1-2, embodiment two of the present utility model is：
The present embodiment is further to material toggling part 7 and blade dryer 2 etc. on the basis of embodiment one to be improved, described
Material toggling part 7 is provided with the first valve 15, and first valve 15 is used for the amount for the superheated steam for controlling exhaust outlet 12 to discharge, described
The length of exhaust outlet 72 is more than length 20mm of the feed opening 13 parallel to the axis of steel pipe 71 of feeding screw 8, and the blade dries
Dry machine 2 includes being respectively equipped with chuck on blade 22 and housing 21, the blade 22 and housing 21, and the reducing-and-cooling plant 1 leads to
Piping is connected with blade 22 and housing 21, and the reducing-and-cooling plant 1 is changed with blade dryer 2, air heat exchanger 9 and hot blast
The second valve 16, the 3rd valve 17 and the 4th valve 18, in addition to condensate draining 12, institute are respectively equipped with pipeline between hot device 6
State condensate draining 12 with the desuperheat water inlet of reducing-and-cooling plant 1 to be connected, the condensate draining 12 and blade dryer 2, hot blast
Heat exchanger 6 is connected with the condensing water conduit of air heat exchanger 9.
In summary, the device for drying carbon black that the utility model is provided, wet carbon black is transported to oar by feeding screw
Leaf dryer, dispels flash distillation by the superheated steam discharged on the exhaust outlet of material toggling part before the extruding by blade and loses one
Part moisture, makes carbon black loose, improves the mobility of carbon black, while reducing wet carbon black when drying the stop of chain-drive section
Between, it is to avoid carbon black lumps, extrudes and destroy carbon black structure, and the drying efficiency for improving carbon black also improves carbon black products quality；Dial
Materials and parts exist in steel pipe form, and exhaust ports design is set into along the parallel axis direction with steel pipe, and the length of exhaust outlet is more than
Equal to feeding screw feed opening parallel to steel pipe axis length, while material toggling part is vertical with the feed opening of feeding screw
Set so that the superheated steam of exhaust outlet discharge is vertical with the wet carbon black discharged from feed opening, it is ensured that wet carbon black and superheated steam
Abundant contact, the contact area of wet carbon black and superheated steam is maximum, the expansion drying efficiency high of wet carbon black, and blown under this state
The degree of dissipating is maximum；Material toggling part, blade dryer, the control of the input of air heat exchanger and the steam in hot air heat exchanger pass through phase
Answer the valve set on pipeline to be controlled, temperature control is not being destroyed the temperature of carbon black structure；Charcoal after expansion drying
The contact drying for the saturated vapor being passed through in chuck on black process blade and housing, drying effect is good；Blade drier
The hot-air that the moisture evaporated afterwards is produced after being heated through air heat exchanger is carried over offgas outlet, into later stage vent gas treatment
In the stage, reduce the pollution to environment；Tail gas is entered before sack cleaner is entered by hot air heat exchanger to outside cold air
Row heating, supplements a part of hot-air, by exhaust temperature control on dew point, it is to avoid sack cleaner paste bag；Pass through star
Type discharge valve is realized carries out discharging to the carbon black collected in cyclone dust collectors and sack cleaner, simple to operate, it is easy to accomplish, just
The collection of carbon black in cyclone dust collectors and sack cleaner；Blade dryer, hot air heat exchanger and air heat exchanger are by changing
The condensed water produced after heat is all back in condensate draining by connected condensing water conduit respectively, the condensed water of whole system
Reducing-and-cooling plant is back to use, as the moisturizing of reducing-and-cooling plant, water resource is recycled, accomplishes that the energy makes full use of.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical fields, are similarly included in scope of patent protection of the present utility model.
Claims (9)
1. a kind of device for drying carbon black, it is characterised in that：Including reducing-and-cooling plant, blade dryer, air heat exchanger, whirlwind
Deduster, sack cleaner, air-introduced machine and hot air heat exchanger, the feed end of the blade dryer are provided with material toggling part and spiral
Feeder, the material toggling part is provided with exhaust outlet, and the feed opening of the exhaust outlet correspondence feeding screw is set, the exhaust outlet
Discharge directions and feeding screw blanking direction it is angled set, the angle ranging from 60 °~90 °, the blade dryer
Offgas outlet is provided with, the reducing-and-cooling plant is connected with blade dryer, air heat exchanger and hot air heat exchanger respectively, institute
State offgas outlet, cyclone dust collectors, sack cleaner and air-introduced machine to be sequentially connected, outlet and the cloth bag of the hot air heat exchanger are removed
The import of dirt device is connected.
2. device for drying carbon black according to claim 1, it is characterised in that：The material toggling part is a steel pipe, the steel pipe
One end be connected with outside pipeline, the other end of the steel pipe is the closing mouth of pipe, axle of the exhaust outlet edge parallel to steel pipe
Line direction is set.
3. device for drying carbon black according to claim 2, it is characterised in that：The material toggling part is arranged on feeding screw
Lower section, the material toggling part is set perpendicular to feeding screw, and the distance between the material toggling part and feeding screw is 8-10cm.
4. device for drying carbon black according to claim 3, it is characterised in that：The length and feeding screw of the exhaust outlet
Feed opening parallel to steel pipe axis equal length or exhaust outlet length be more than feeding screw feed opening parallel to steel
The length of pipe axis.
5. device for drying carbon black according to claim 1, it is characterised in that：The material toggling part is provided with the first valve.
6. device for drying carbon black according to claim 1, it is characterised in that：The blade dryer includes blade and shell
Chuck is respectively equipped with body, the blade and housing, the reducing-and-cooling plant is connected by pipeline with blade and housing.
7. device for drying carbon black according to claim 1, it is characterised in that：Also include condensate draining, the condensate draining
It is connected with the desuperheat water inlet of reducing-and-cooling plant, the condensate draining and blade dryer, hot air heat exchanger and air heat-exchange
The condensing water conduit of device is connected.
8. device for drying carbon black according to claim 1, it is characterised in that：The reducing-and-cooling plant is distinguished by pipeline
It is connected with blade dryer, air heat exchanger and hot air heat exchanger, the reducing-and-cooling plant and blade dryer, air heat-exchange
The second valve, the 3rd valve and the 4th valve are respectively equipped with pipeline between device and hot air heat exchanger.
9. device for drying carbon black according to claim 1, it is characterised in that：The cyclone dust collectors and sack cleaner
Bottom is respectively equipped with star-shaped discharge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225154.XU CN206572848U (en) | 2017-03-09 | 2017-03-09 | A kind of device for drying carbon black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225154.XU CN206572848U (en) | 2017-03-09 | 2017-03-09 | A kind of device for drying carbon black |
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| Publication Number | Publication Date |
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| CN206572848U true CN206572848U (en) | 2017-10-20 |
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ID=60056556
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720225154.XU Expired - Fee Related CN206572848U (en) | 2017-03-09 | 2017-03-09 | A kind of device for drying carbon black |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062803A (en) * | 2017-03-09 | 2017-08-18 | 福建省环境工程有限公司 | A kind of device for drying carbon black |
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2017
- 2017-03-09 CN CN201720225154.XU patent/CN206572848U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062803A (en) * | 2017-03-09 | 2017-08-18 | 福建省环境工程有限公司 | A kind of device for drying carbon black |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |