CN112076719A - Improved multi-hearth furnace for activated carbon regeneration and application - Google Patents
Improved multi-hearth furnace for activated carbon regeneration and application Download PDFInfo
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- CN112076719A CN112076719A CN202010823662.4A CN202010823662A CN112076719A CN 112076719 A CN112076719 A CN 112076719A CN 202010823662 A CN202010823662 A CN 202010823662A CN 112076719 A CN112076719 A CN 112076719A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000011069 regeneration method Methods 0.000 title claims abstract description 27
- 230000008929 regeneration Effects 0.000 title claims abstract description 25
- 230000004913 activation Effects 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000001994 activation Methods 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000003763 carbonization Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 2
- 210000000038 chest Anatomy 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000009467 reduction Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
- B01J20/3466—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase with steam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/39—Apparatus for the preparation thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to an improved multi-hearth furnace for activated carbon regeneration, which comprises a furnace body, a feeding hole, an air outlet, a discharging hole, a middle shaft device, a transmission device, a steam spray pipe and a burner, wherein the furnace body is arranged along the vertical direction, the feeding hole and the air outlet are arranged at the upper part of the furnace body at intervals, the discharging hole is arranged at the lower part of the furnace body, and the steam spray pipe and the burner are arranged on the side wall of the furnace body; a plurality of hearths are arranged in the furnace body at intervals along the vertical direction; the lower part of the middle shaft device is connected with a transmission device, the transmission device can drive the middle shaft device to rotate, and the middle shaft device can realize the overturning and propelling of materials in the furnace chamber. The multi-hearth furnace has the advantages of more reasonable structural design, realization of uniform and high-efficiency activation reaction, energy conservation and emission reduction, shortening of activation time, reduction of regeneration cost, effective improvement of activated carbon activation efficiency, reduction of water vapor consumption, control of temperature uniformity of the furnace chamber, reduction of energy consumption, and integral improvement of the operating speed and reliability of the multi-hearth furnace.
Description
Technical Field
The invention belongs to the technical field of high-temperature pyrolysis furnaces, and particularly relates to an improved multi-hearth furnace for activated carbon regeneration and application.
Background
The activated carbon is widely applied to environmental protection, industry and civilian aspects due to unique adsorbability, but because the activated carbon is easily saturated in the using process and loses the adsorbability, the enterprise cost is increased if the activated carbon is directly replaced, meanwhile, because the activated carbon can not realize the complete degradation and elimination of pollutants, the pollutants are only transferred and enriched, if the waste activated carbon is directly treated, the secondary pollution to the environment can be caused, the resource waste can also be caused, and therefore, the economic and environmental win-win development of activated carbon regeneration can be realized.
The heat regeneration method in the activated carbon regeneration method is a mature and widely applied method, the heat regeneration process is that the activated carbon is treated under certain conditions (such as drying and carbonization) and then is activated, the activation process is mainly characterized in that activated gas (such as water vapor) reacts with unstable coke remained in activated carbon pores at high temperature to empty the activated carbon pore passages and restore the activity, and most of common multi-hearth furnaces directly spray the water vapor into the activation furnace or onto the surface of a hearth material through a pipeline to realize the contact probability of the water vapor and the carbon so as to ensure the activated carbon to be activated.
However, the prior art has the following defects:
(1) the method for injecting the water vapor into the furnace cavity mainly realizes the activation process by increasing the water vapor content in the activation atmosphere in the whole activation furnace, so that the water vapor consumption is larger, the regeneration energy consumption is large, and more exhaust gas is discharged.
(2) And water vapor is sprayed to the surface of the hearth material, the activation process is realized by turning over the material by means of rake teeth in the furnace and the surface probability, but the surface temperature of the regenerated carbon and the activation reaction are uneven easily caused by directly spraying the water vapor to the surface of the material.
There is therefore a need for one or more associated apparatus or methods.
Through searching, no patent publication related to the present patent application has been found.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an improved multi-hearth furnace for activated carbon regeneration and application thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the improved multi-hearth furnace for activated carbon regeneration comprises a furnace body, a feed inlet, an air outlet, a discharge outlet, a middle shaft device, a transmission device, a steam spray pipe and a burner, wherein the furnace body is arranged along the vertical direction, the feed inlet and the air outlet are arranged at the upper part of the furnace body at intervals, the discharge outlet is arranged at the lower part of the furnace body, and the steam spray pipe and the burner are arranged on the side wall of the furnace body;
a plurality of hearths are arranged in the furnace body at intervals along the vertical direction, a plurality of furnace chambers are formed by the plurality of hearths and the furnace body, and blanking ports are arranged on adjacent hearths in a staggered manner;
the middle shaft device is coaxially arranged with the furnace body, the lower part of the middle shaft device is connected with the transmission device, the transmission device can drive the middle shaft device to rotate, and the middle shaft device can realize the overturning and propelling of materials in the furnace chamber.
The middle shaft device comprises a hollow shaft with a jacket, cantilevers and pushing and stirring teeth, the hollow shaft penetrates through the furnace body in the vertical direction and is coaxial with the furnace body, the hollow shaft is provided with correspondingly staggered cantilever groups in different furnace chambers in the vertical direction, each cantilever group comprises cantilevers, the number of the cantilevers in each layer of furnace chamber is not less than two, and more than two cantilevers in the same layer of furnace chamber are uniformly distributed and spaced on the same plane of the middle shaft in the circumferential direction; the pushing and stirring teeth are connected and arranged below the cantilever.
Moreover, the cantilever is fixedly connected to the hollow shaft through a pin, and the pushing and stirring teeth are clamped and fixed on the cantilever;
the multi-hearth furnace further comprises a cooling fan, the lower portion of the hollow shaft of the middle shaft device is connected with the cooling fan, the cooling fan can blow air into the hollow shaft, and the cooling fan cools the middle shaft device through blowing air into the hollow shaft.
And the furnace chamber at least comprises a furnace chamber capable of realizing the drying, carbonization and activation processes of the activated carbon.
And the burner is arranged on the furnace body outside the furnace chamber, and the hot smoke spraying direction of the burner is opposite to the material rotating direction.
And, adjacent furnace chamber staggered arrangement combustor, when same furnace chamber lateral wall need set up a plurality of combustors, a plurality of combustors on this furnace chamber lateral wall along the circumferencial direction equipartition interval setting.
The furnace hearth comprises a furnace hearth II and a furnace hearth I, the furnace hearth I and the furnace hearth II are arranged in a staggered mode along the vertical direction, a plurality of blanking ports are uniformly distributed on the furnace hearth I at intervals along the circumferential direction and close to the inner wall of the furnace body, a blanking port is arranged in the center of the furnace hearth II, and the blanking port and the middle shaft device are arranged coaxially;
the steam spray pipe is arranged on a furnace body outside the activation furnace chamber and comprises a steam pipeline I and a steam pipeline II/spray gun, the steam pipeline I is arranged below the hearth I, and the steam pipeline II/spray gun is arranged below the hearth II.
Moreover, the hearth has a self-supporting structure;
the steam pipeline I is an annular steam pipeline, a plurality of gas injection pipes are arranged on the inner circular wall of the annular steam pipeline, nozzles are arranged at outlets of the gas injection pipes, the number of the gas injection pipes and the number of the nozzles are the same as that of blanking ports of the hearth I, the nozzles are arranged below the blanking ports, and the nozzles are arranged right opposite to the blanking ports;
a control valve is arranged between the gas ejector pipe and the nozzle;
the steam pipeline II comprises a plurality of steam pipes, a nozzle is arranged at the outlet of each steam pipe, and the steam pipes are uniformly distributed and spaced below the hearth II;
and the plurality of steam pipelines are all provided with control valves.
The material of the nozzles is high-temperature-resistant material, the nozzles spray steam in a fan shape, the steam sprayed by the nozzles of the steam pipeline I is in a fan shape, the width of the fan shape is smaller than 60% of the width of the curtain formed by the feeding port, and the width of the fan shape sprayed by the nozzles of the steam pipeline II is not smaller than 30% of the width of the curtain of the blanking port;
the spraying direction of the nozzle and the blanking direction of the blanking port are arranged in a declining way at an acute angle.
The application of the improved activated carbon regeneration multi-hearth furnace in the aspect of activated carbon regeneration is described.
The invention has the advantages and effects that:
1. the multi-hearth furnace has the advantages of more reasonable structural design, realization of uniform and high-efficiency activation reaction, energy conservation and emission reduction, shortening of activation time, reduction of regeneration cost, effective improvement of activated carbon activation efficiency, reduction of water vapor consumption, control of temperature uniformity of the furnace chamber, reduction of energy consumption, and integral improvement of operating speed and reliability of the multi-hearth furnace.
2. The multi-hearth furnace has the advantages that the strong staggered mixing is formed by spraying water vapor at a high speed and forming the material curtain of the upper hearth blanking port, the convection and contact probability of the water vapor on the surface of the activated carbon is increased, meanwhile, the materials and the water vapor are in staggered collision, the extrusion of activated gas into (residual carbon after carbonization) holes can be quickly realized, and the gasification reaction probability of the residual carbon is improved. The multi-hearth furnace not only improves the activated carbon activation reaction speed and uniformity, but also improves the utilization efficiency of water vapor, reduces the water vapor consumption and realizes the purposes of high efficiency, stability and energy conservation of the multi-hearth furnace.
3. In order to improve the contact efficiency of the activated carbon and the steam, the steam nozzles arranged at each blanking port of the hearth are obliquely arranged downwards.
4. The invention increases the heat conduction efficiency of the activation furnace chamber, improves the temperature uniformity of the furnace chamber, and the burner on the activation furnace chamber is obliquely arranged.
5. According to the invention, the steam lower-inclined jet orifice is arranged at the position corresponding to the hearth feed opening, so that the cross flow and the downstream flow of the material and the steam can be staggered, the atmosphere layering of the activation cavity can be realized, the proper steam content of the activation atmosphere close to the material layer can be ensured to ensure the material contact, and the whole steam consumption, energy consumption and waste gas discharge can be reduced.
6. The invention can form a steam protective film on the surface of the activated carbon by spraying the steam on the surface of the activated carbon in a staggered way, thereby reducing the local high-temperature radiation of the activated carbon by a burner and reducing the over-fast activation reaction rate and uneven activation caused by high local temperature.
7. The gas mixing cyclone type turbulent flow state formed by obliquely jetting the combustion flue gas is in counter-current with the rotation direction of the stirring materials of the middle shaft device, so that the gas-solid counter-current is increased, the probability of extruding the activated gas into the pores of the activated carbon is easier, and the activation time is reduced.
Drawings
FIG. 1 is a schematic view of a structural connection of the multiple hearth furnace of the present invention;
FIG. 2 is a schematic view of the steam injection at the lower part of the hearth I of FIG. 1;
FIG. 3 is a schematic view of the steam injection under hearth II of FIG. 1.
Detailed Description
The present invention will be further described with reference to specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The raw materials used in the invention are conventional commercial products unless otherwise specified; the methods used in the present invention are conventional in the art unless otherwise specified.
An improved multi-hearth furnace for activated carbon regeneration is shown in fig. 1, fig. 2 and fig. 3, and comprises a furnace body 3, a feeding hole 1, an air outlet 2, a discharging hole 13, a middle shaft device, a transmission device 14, a steam spray pipe and a burner 12, wherein the furnace body is arranged along the vertical direction, the feeding hole and the air outlet are arranged at the upper part of the furnace body at intervals, the discharging hole is arranged at the lower part of the furnace body, and the steam spray pipe and the burner are arranged on the side wall of the furnace body;
a plurality of hearths are arranged in the furnace body at intervals along the vertical direction, a plurality of furnace chambers 18 are formed by the plurality of hearths and the furnace body, and blanking ports are arranged on the adjacent hearths in a staggered manner;
the middle shaft device is coaxially arranged with the furnace body, the lower part of the middle shaft device is connected with the transmission device, the transmission device can drive the middle shaft device to rotate, and the middle shaft device can realize the overturning and propelling of materials in the furnace chamber.
In this embodiment, the middle shaft device includes a hollow shaft 6 with a jacket, cantilevers 7 and pushing and stirring teeth 8, the hollow shaft penetrates through the furnace body along the vertical direction and is coaxial with the furnace body, the hollow shaft is provided with correspondingly staggered cantilever groups along the vertical direction and in different furnace chambers, each cantilever group includes cantilevers, the number of the cantilevers in each furnace chamber is not less than two, and more than two cantilevers in the same furnace chamber are uniformly distributed and spaced on the same plane on the middle shaft along the circumferential direction; the pushing and stirring teeth are connected and arranged below the cantilever.
Preferably, the cantilever is fixedly connected to the hollow shaft through a pin, and the pushing and stirring teeth are clamped and fixed on the cantilever.
In this embodiment, the multi-hearth furnace further includes a cooling fan 15, the lower portion of the hollow shaft of the central shaft device is connected to the cooling fan, the cooling fan can blow air into the hollow shaft, and the cooling fan cools the central shaft device by blowing air into the hollow shaft.
In this embodiment, the furnace chamber includes at least a furnace chamber capable of performing processes such as drying, carbonization, and activation of activated carbon.
In this embodiment, the hearth comprises a hearth II 4 and a hearth I5, the hearth I and the hearth II are staggered in the vertical direction, a plurality of blanking ports 19 are uniformly distributed on the hearth I at intervals along the circumferential direction and close to the inner wall of the furnace body, and a blanking port 17 is arranged in the center of the hearth II and is coaxial with the middle shaft device;
the steam spray pipe is arranged on a furnace body outside the activation furnace chamber and comprises a steam pipeline I9 and a steam pipeline II/spray gun 16, the steam pipeline I is arranged below the hearth I, and the steam pipeline II/spray gun is arranged below the hearth II.
Preferably, the hearth has a self-supporting (e.g. arched) structure.
Preferably, steam conduit I is annular steam conduit, set up a plurality of jet-propelled pipes on the circular steam conduit inner circular wall, the jet-propelled pipe export sets up nozzle 10, and the quantity of jet-propelled pipe and nozzle is the same with the blanking mouth quantity of hearth I, and this nozzle sets up in the below of blanking mouth, and this nozzle just sets up to the blanking mouth.
Preferably, a control valve 11 is arranged between the gas lance and the nozzle.
Preferably, the steam pipeline II comprises a plurality of (such as 3) steam pipes, a nozzle is arranged at the outlet of each steam pipe, and the steam pipes are uniformly distributed and arranged at intervals below the furnace bed II.
Preferably, the plurality (e.g. 3) of vapor pipes are each provided with a control valve.
Preferably, the nozzle is made of high-temperature-resistant materials, the nozzle sprays steam in a fan shape, the steam sprayed from the nozzle of the steam pipeline I is in a fan shape, the width of the fan shape is smaller than 60% of the width of a curtain formed by the feeding port, and the width of the fan shape sprayed from the nozzle of the steam pipeline II is not smaller than 30% of the width of the curtain of the blanking port.
Preferably, the spraying direction of the nozzle and the blanking direction of the blanking port are inclined at an acute angle.
The specific nozzle configuration or slope for the vapor nozzle I configuration is varied so long as the configuration achieves all the benefits and controls.
For the vapor nozzle II configuration, a different type of lance or other means sufficient to achieve all the benefits may be used in place of the above configuration and need not necessarily be 3 in number, and any suitable number and arrangement may be used.
In this embodiment, the burners are disposed on the furnace body outside the furnace chamber, and a corresponding number of burners can be disposed according to the requirements of the benefit of activated carbon regeneration and the control condition, and the hot flue gas ejection direction of the burners is opposite to the material rotation direction.
Any suitable number and arrangement of burners may be used, as long as all benefits and controls are achieved for the burners, and the number need not be 3 as shown in the figure.
Preferably, the burners are staggered in adjacent furnace chambers, and when a plurality of burners are required to be arranged on the same furnace chamber side wall, the plurality of burners on the furnace chamber side wall are uniformly arranged at intervals along the circumferential direction.
Preferably, the setting angle of the burner is adjusted and improved according to the matching of the nozzle of the steam pipeline.
The multi-hearth furnace is improved aiming at the traditional multi-hearth furnace activation design scheme, and the precise layered control of the activation atmosphere is carried out on the materials entering the activation furnace chamber on the basis of the traditional design. Meanwhile, the water vapor nozzle can be adjusted and the opening of the valve can be adjusted according to the feeding amount of the multi-hearth furnace and the pushing and stirring tooth pushing (the rotating speed of the middle shaft device) feeding speed, so that the content of the activated gas can be flexibly controlled, the structure can easily and efficiently realize the contact probability of residual carbon and the activated gas, the ideal treatment effect is achieved, and each gas injection pipe is provided with automatic closing/stopping operation.
In conclusion, the device can effectively improve the activated carbon activation efficiency, reduce the water vapor consumption, control the temperature uniformity of the furnace chamber, reduce the energy consumption and integrally improve the operation speed and the reliability of the multi-chamber furnace.
The working operation principle of the improved multi-hearth furnace for activated carbon regeneration is as follows:
granular activated carbon falls into a hearth in a furnace chamber from a feeding hole, a rake arm and a pushing and stirring tooth are driven by the rotation motion of a middle shaft device, solid materials are mechanically pushed under the action of the pushing and stirring tooth and gradually move to the middle of the hearth from the outer side of the hearth, finally fall into the next layer of hearth from a middle hole of the hearth, then the materials are continuously pushed on the layer of hearth by the pushing and stirring tooth and gradually move to the outer side of the hearth from the middle of the hearth, and then fall into the third layer of hearth from a blanking hole on the outer side of the hearth. Repeating the steps, the material moves slowly from top to bottom, and the drying, carbonizing and activating processes are completed in the moving process.
Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments disclosed.
Claims (10)
1. The utility model provides an improved generation's regenerated many thorax stove of active carbon which characterized in that: the multi-hearth furnace comprises a furnace body, a feed inlet, an air outlet, a discharge outlet, a middle shaft device, a transmission device, a steam spray pipe and a burner, wherein the furnace body is arranged along the vertical direction, the feed inlet and the air outlet are arranged at intervals on the upper part of the furnace body, the discharge outlet is arranged on the lower part of the furnace body, and the steam spray pipe and the burner are arranged on the side wall of the furnace body;
a plurality of hearths are arranged in the furnace body at intervals along the vertical direction, a plurality of furnace chambers are formed by the plurality of hearths and the furnace body, and blanking ports are arranged on adjacent hearths in a staggered manner;
the middle shaft device is coaxially arranged with the furnace body, the lower part of the middle shaft device is connected with the transmission device, the transmission device can drive the middle shaft device to rotate, and the middle shaft device can realize the overturning and propelling of materials in the furnace chamber.
2. The improved multi-hearth furnace for activated carbon regeneration according to claim 1, characterized in that: the middle shaft device comprises a hollow shaft with a jacket, cantilevers and pushing and stirring teeth, the hollow shaft penetrates through the furnace body in the vertical direction and is coaxial with the furnace body, the hollow shaft is provided with correspondingly staggered cantilever groups in different furnace chambers in the vertical direction, each cantilever group comprises cantilevers, the number of the cantilevers in each layer of furnace chamber is not less than two, and more than two cantilevers in the same layer of furnace chamber are uniformly distributed and spaced on the same plane of the middle shaft in the circumferential direction; the pushing and stirring teeth are connected and arranged below the cantilever.
3. The improved multi-hearth furnace for activated carbon regeneration according to claim 2, characterized in that: the cantilever is fixedly connected to the hollow shaft through a pin, and the pushing and stirring teeth are fixedly clamped on the cantilever;
or the multi-hearth furnace further comprises a cooling fan, the lower part of the hollow shaft of the middle shaft device is connected with the cooling fan, the cooling fan can blow air into the hollow shaft, and the cooling fan cools the middle shaft device by blowing air into the hollow shaft.
4. The improved multi-hearth furnace for activated carbon regeneration according to claim 1, characterized in that: the furnace chamber at least comprises a furnace chamber capable of realizing the drying, carbonization and activation processes of the active carbon.
5. The improved multi-hearth furnace for activated carbon regeneration according to claim 1, characterized in that: the combustor is arranged on the furnace body outside the furnace chamber, and the hot smoke spraying direction of the combustor is opposite to the material rotating direction.
6. The improved multi-hearth furnace for activated carbon regeneration according to claim 1, characterized in that: the adjacent furnace chambers are alternately provided with burners, and when a plurality of burners are required to be arranged on the side wall of the same furnace chamber, the plurality of burners on the side wall of the furnace chamber are uniformly arranged at intervals along the circumferential direction.
7. The improved activated carbon regenerating multi-hearth furnace according to any one of claims 1 to 6, characterized in that: the furnace hearth comprises a furnace hearth II and a furnace hearth I, the furnace hearth I and the furnace hearth II are arranged in a staggered mode along the vertical direction, a plurality of blanking ports are uniformly distributed on the furnace hearth I at intervals along the circumferential direction and close to the inner wall of the furnace body, a blanking port is arranged in the center of the furnace hearth II, and the blanking port and the middle shaft device are arranged coaxially;
the steam spray pipe is arranged on a furnace body outside the activation furnace chamber and comprises a steam pipeline I and a steam pipeline II/spray gun, the steam pipeline I is arranged below the hearth I, and the steam pipeline II/spray gun is arranged below the hearth II.
8. The improved multi-hearth furnace for activated carbon regeneration according to claim 7, wherein: the hearth has a self-supporting structure;
the steam pipeline I is an annular steam pipeline, a plurality of gas injection pipes are arranged on the inner circular wall of the annular steam pipeline, nozzles are arranged at outlets of the gas injection pipes, the number of the gas injection pipes and the number of the nozzles are the same as that of blanking ports of the hearth I, the nozzles are arranged below the blanking ports, and the nozzles are arranged right opposite to the blanking ports;
a control valve is arranged between the gas ejector pipe and the nozzle;
the steam pipeline II comprises a plurality of steam pipes, a nozzle is arranged at the outlet of each steam pipe, and the steam pipes are uniformly distributed and spaced below the hearth II;
and the plurality of steam pipelines are all provided with control valves.
9. The improved multi-hearth furnace for activated carbon regeneration according to claim 8, wherein: the material of the nozzle is high temperature resistant material, the nozzle sprays water vapor in a fan shape, the water vapor sprayed by the nozzle of the steam pipeline I is in a fan shape, the width of the fan shape is smaller than 60% of the width of the curtain formed by the feeding opening, and the width of the fan shape sprayed by the nozzle of the steam pipeline II is not smaller than 30% of the width of the curtain of the feeding opening;
the spraying direction of the nozzle and the blanking direction of the blanking port are arranged in a declining way at an acute angle.
10. Use of an improved activated carbon regeneration multi-hearth furnace as claimed in any one of claims 1 to 9 for activated carbon regeneration.
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| CN112717906A (en) * | 2021-01-21 | 2021-04-30 | 南京凯美科环境科技有限公司 | Turnover mechanism for pyrolysis hearth of regenerated activated carbon |
| CN114192127A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Feeding propulsion device for activated carbon regeneration |
| CN114192128A (en) * | 2021-12-13 | 2022-03-18 | 温州一霖再生资源有限公司 | Activated carbon regeneration equipment with exhaust-heat boiler |
| CN114471499A (en) * | 2022-02-07 | 2022-05-13 | 天津天一爱拓科技有限公司 | High-efficiency regeneration system and method for high-salt-content wood powder activated carbon |
| CN114534705A (en) * | 2022-02-07 | 2022-05-27 | 天津天一爱拓科技有限公司 | Multi-hearth furnace activated carbon regeneration system and method |
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