Energy-saving carbonization system for activated carbon

Abstract

An energy-saving carbonization system for activated carbon comprises a rotary kiln, a preheating chamber, a boiler chamber, a steam pipeline, a flue gas pipeline, a drying chamber, a belt conveyor and a negative pressure pipeline, a feeding port of the rotary kiln is adjacent to the preheating chamber so as to add preheated activated carbon into the rotary kiln, the boiler chamber is adjacent to the preheating chamber, one end of the steam pipeline is communicated with the boiler chamber, and the other end of the steam pipeline is communicated with the flue gas pipeline. The other end of the steam pipeline is communicated with the rotary kiln so as to introduce steam into the rotary kiln, one end of the flue gas pipeline is communicated with the rotary kiln, the other end of the flue gas pipeline is communicated with the drying chamber, the drying chamber is provided with a flue gas interlayer, high-temperature flue gas is introduced into the flue gas interlayer so as to increase the temperature of the drying chamber through the high-temperature flue gas, and the belt conveyor is located in the drying chamber. The negative pressure pipeline is located above the belt conveyor, one end of the negative pressure pipeline is communicated with the drying chamber, the other end of the negative pressure pipeline is communicated with the boiler chamber so that gas can be introduced into the boiler chamber for combustion, and the boiler chamber is further communicated with the smoke interlayer through a pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to activated carbon processing technical field especially relates to a kind of activated carbon energy-saving carbonization system. BACKGROUND

[0002] The production process of activated carbon includes raw material coal crushing, kneading, granulation, carbonization, activation. After carbonization and activation process, activated carbon can be packaged and sold after cooling. The carbonization of activated carbon is the process of heating organic raw materials (nut shells, coal, wood, etc.) under the condition of air isolation to reduce non-carbon components. For example, in the manufacture of activated carbon, solid carbonaceous materials (such as coal, wood, hard fruit shells, fruit pits, resins, etc.) are usually carbonized at 600-900℃ under the condition of air isolation. The raw material is heated and decomposed in a sealed, oxygen-free environment, and hydrogen and other substances are volatilized to leave carbon, while forming countless micropores, i.e. completing the carbonization process. Activated carbon is generally transported by belt conveyor from the granulation process to the carbonization process. In the transportation process, some volatile substances of activated carbon itself are exposed to the air. At the same time, the moisture content of the granulated activated carbon is high, and it is easy to deform or break when subjected to external force before or during carbonization. SUMMARY

[0003] Therefore, it is necessary to provide an activated carbon energy-saving carbonization system that can dry the activated carbon after the granulation process and reduce the emission of volatile substances, while effectively utilizing the heat energy and volatile substances in the carbonization furnace to reduce energy waste and environmental pollution.

[0004] An activated carbon energy-saving carbonization system includes a rotary kiln, a preheating chamber, a boiler chamber, a steam pipeline, a flue gas pipeline, a drying chamber, a belt conveyor, and a negative pressure pipeline. The feed inlet of the rotary kiln is adjacent to the preheating chamber to add the preheated activated carbon to the rotary kiln. The boiler chamber is adjacent to the preheating chamber. One end of the steam pipeline is in communication with the boiler chamber, and the other end of the steam pipeline is in communication with the rotary kiln to pass water vapor into the rotary kiln. One end of the flue gas pipeline is in communication with the other end of the flue gas pipeline, and the other end of the flue gas pipeline is in communication with the drying chamber. The drying chamber is provided with a flue gas interlayer, and high-temperature flue gas is passed into the flue gas interlayer to increase the temperature of the drying chamber by high-temperature flue gas. The belt conveyor is located in the drying chamber to dry the activated carbon. The negative pressure pipeline is located above the belt conveyor, one end of the negative pressure pipeline is in communication with the drying chamber, and the other end of the negative pressure pipeline is in communication with the boiler chamber to pass gas into the boiler chamber for combustion. The boiler chamber is also in communication with the flue gas interlayer through a pipeline to send flue gas into the boiler chamber for combustion.

[0005] Preferably, the boiler chamber includes a steam drum and a combustion chamber. The steam drum is connected with the steam pipeline, the combustion chamber is connected with the negative pressure pipeline, and the combustion chamber is also connected with the flue gas interlayer of the drying chamber through a pipeline.

[0006] Preferably, the flue gas interlayer is provided with a serpentine coil, the gas inlet of the serpentine coil is connected with the flue gas pipeline, and the gas outlet of the serpentine coil is connected with the combustion chamber through a pipeline.

[0007] Preferably, the negative pressure pipeline comprises a branch pipeline, a collecting pipeline and a negative pressure fan, the gas inlet of the branch pipeline is connected with the drying chamber, the gas outlet of the branch pipeline is connected with one end of the collecting pipeline, the other end of the collecting pipeline is connected with the combustion chamber, and the negative pressure fan is arranged on the collecting pipeline.

[0008] Preferably, the rotary kiln comprises a feeding section, a carbonization section and a discharging section, the flue gas pipeline is communicated with the feeding section of the rotary kiln, the steam pipeline is communicated with the discharging section of the rotary kiln, and the carbonization section is located in the middle of the rotary kiln.

[0009] Preferably, the preheating chamber is provided with a screw conveyor to control the conveying amount of the activated carbon, the bottom of the preheating chamber is inclined to the feeding port of the rotary kiln, and the screw rod of the screw conveyor is parallel to the bottom of the preheating chamber, so that the activated carbon is conveyed conveniently.

[0010] Beneficial effects: The activated carbon energy-saving carbonization system of the utility model utilizes the high-temperature flue gas in the carbonization process to dry the activated carbon on the belt conveyor, thereby improving the hardness of the activated carbon. Then, the combustible gas in the high-temperature flue gas is used as fuel to heat water into steam, thereby providing raw materials for the carbonization process. The utility model also utilizes the volatile combustible gas generated in the activated carbon drying process as fuel for the boiler chamber. The boiler chamber and the rotary kiln are adjacent to the preheating chamber, and the heat conducted by the boiler chamber and the rotary kiln can preheat the activated carbon, thereby reducing energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a preferable angle structure schematic view of the activated carbon energy-saving carbonization system of the utility model.

[0012] Figure 2 It is another preferable angle structure schematic view of the activated carbon energy-saving carbonization system of the utility model.

[0013] In the drawing: activated carbon energy-saving carbonization system 10, rotary kiln 20, feeding section 201, carbonization section 202, discharging section 203, preheating chamber 30, combustion chamber 402, steam pipeline 50, flue gas pipeline 60, drying chamber 70, flue gas interlayer 701, belt conveyor 80, negative pressure pipeline 90, branch pipeline 901, collecting pipeline 902. DETAILED DESCRIPTION

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0015] Please refer to Figure 1 and Figure 2 The active carbon energy-saving carbonization system 10 comprises a rotary kiln 20, a preheating chamber 30, a boiler chamber, a steam pipeline 50, a flue gas pipeline 60, a drying chamber 70, a belt conveyor 80 and a negative pressure pipeline 90. The rotary kiln 20 is adjacent to the preheating chamber 30 to add the preheated active carbon into the rotary kiln 20. The boiler chamber is adjacent to the preheating chamber 30. One end of the steam pipeline 50 is communicated with the boiler chamber, and the other end of the steam pipeline 50 is communicated with the rotary kiln 20 to pass the water vapor into the rotary kiln 20. One end of the flue gas pipeline 60 is communicated with the drying chamber 70, and the other end of the flue gas pipeline 60 is communicated with the drying chamber 70. The drying chamber 70 is provided with a flue gas interlayer 701. The high-temperature flue gas is passed into the flue gas interlayer 701 to increase the temperature of the drying chamber 70 by the high-temperature flue gas. The belt conveyor 80 is located in the drying chamber 70 to dry the active carbon. The negative pressure pipeline 90 is located above the belt conveyor 80. One end of the negative pressure pipeline 90 is communicated with the drying chamber 70, and the other end of the negative pressure pipeline 90 is communicated with the boiler chamber to pass the gas into the boiler chamber to be combusted. The boiler chamber is also communicated with the flue gas interlayer 701 through a pipeline to pass the flue gas into the boiler chamber to be combusted.

[0016] The rotary kiln 20 of the present application is used for carbonization of the active carbon. The present application uses the water vapor to participate in the carbonization process of the active carbon in a high-temperature environment. The carbonization process of the rotary kiln 20 is an exothermic process, and the heat energy provided can make the active carbon complete the carbonization. The high-temperature flue gas generated in the carbonization process is rich in combustible components, such as hydrogen and carbon monoxide.

[0017] The preheating chamber 30 of the present application is used for preheating of the active carbon. The granulated active carbon enters the preheating chamber 30 after being conveyed by the belt conveyor 80, and the heat conduction of the rotary kiln 20 and the boiler chamber is used to preheat the active carbon. Thus, the carbonization time of the active carbon is reduced, and part of the energy consumption can also be reduced.

[0018] The boiler chamber of the present application is used to combust the flue gas of the rotary kiln 20 and the volatile combustible substances of the drying chamber 70 to provide heat by generating water vapor.

[0019] The steam pipeline 50 of the present application is used to convey the steam of the boiler chamber to the rotary kiln 20 to participate in the carbonization process.

[0020] The flue gas pipeline 60 is used for passing the high-temperature flue gas of the rotary kiln 20 into the flue gas interlayer 701 of the drying chamber 70, thereby providing heat for drying the activated carbon after granulation.

[0021] The drying chamber 70 is used for drying the activated carbon after granulation, and reducing the escape of organic volatile substances into the atmosphere.

[0022] The belt conveyor 80 is used for conveying the activated carbon after granulation into the rotary kiln 20 for carbonization.

[0023] The negative pressure pipeline 90 is used for leading the volatile substances in the activated carbon after drying into the boiler chamber. The gas entering the boiler chamber through the negative pressure pipeline 90 is not only combustible gas, but also oxygen, thereby realizing the process of sufficient combustion.

[0024] In order to better utilize the heat in the flue gas, an insulation layer can be arranged on the outer wall of the drying chamber 70.

[0025] In a preferred embodiment, the boiler chamber comprises a steam drum and a combustion chamber 402, the steam drum is connected with the steam pipeline 50, the combustion chamber 402 is connected with the negative pressure pipeline 90, and the combustion chamber 402 is further connected with the flue gas interlayer 701 of the drying chamber 70 through a pipeline.

[0026] The steam drum is used for generating water vapor, which is the structure of a conventional boiler, and the utility model will not be described in detail.

[0027] In a preferred embodiment, the flue gas interlayer 701 is provided with a serpentine coil pipe, the gas inlet of the serpentine coil pipe is connected with the flue gas pipeline 60, and the gas outlet of the serpentine coil pipe is connected with the combustion chamber 402 through a pipeline.

[0028] The serpentine coil pipe can increase the residence time of the high-temperature flue gas in the flue gas interlayer 701, thereby fully utilizing the heat in the high-temperature flue gas.

[0029] In a preferred embodiment, the negative pressure pipeline 90 comprises branch pipelines 901, a collecting pipeline 902 and a negative pressure fan, the gas inlet of the branch pipeline 901 is connected with the drying chamber 70, the gas outlet of the branch pipeline 901 is connected with one end of the collecting pipeline 902, the other end of the collecting pipeline 902 is connected with the combustion chamber 402, and the negative pressure fan is arranged on the collecting pipeline 902.

[0030] In a preferred embodiment, the rotary kiln 20 comprises a feeding section 201, a carbonization section 202 and a discharging section 203, the flue gas pipeline 60 is communicated with the feeding section 201 of the rotary kiln 20, the steam pipeline 50 is communicated with the discharging section 203 of the rotary kiln 20, and the carbonization section 202 is located in the middle of the rotary kiln 20. In this way, the water vapor can fully participate in the carbonization process, and the existence of a large amount of unreacted steam in the flue gas pipeline 60 is avoided.

[0031] In a preferred embodiment, a screw conveyor is arranged in the preheating chamber 30 to control the feeding amount of the activated carbon, the bottom of the preheating chamber 30 is inclined to the feeding port of the rotary kiln 20, and the screw rod of the screw conveyor is parallel to the bottom of the preheating chamber 30 to facilitate the feeding of the activated carbon.

[0032] The screw conveyor is started when the rotary kiln 20 needs to be fed, and is stopped when the rotary kiln 20 does not need to be fed.

[0033] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the present application, and those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope of the present application.

Claims

1. An energy-saving activated carbon carbonization system, characterized in that: The system includes a rotary kiln, a preheating chamber, a boiler chamber, a steam pipe, a flue gas pipe, a drying chamber, a belt conveyor, and a negative pressure pipe. The feed inlet of the rotary kiln is adjacent to the preheating chamber to add preheated activated carbon. The boiler chamber is adjacent to the preheating chamber. One end of the steam pipe is connected to the boiler chamber, and the other end is connected to the rotary kiln to introduce steam. One end of the flue gas pipe is connected to the drying chamber, and the other end is connected to the drying chamber. The drying chamber has a flue gas jacket, into which high-temperature flue gas is introduced to raise the temperature of the drying chamber. The belt conveyor is located inside the drying chamber to dry the activated carbon. The negative pressure pipe is located above the belt conveyor, with one end connected to the drying chamber and the other end connected to the boiler chamber to introduce gas for combustion. The boiler chamber is also connected to the flue gas jacket via a pipe to send flue gas into the boiler chamber for combustion.

2. The activated carbon energy-saving carbonization system as described in claim 1, characterized in that: The boiler room includes a steam drum and a combustion chamber. The steam drum is connected to a steam pipeline, and the combustion chamber is connected to a negative pressure pipeline. The combustion chamber is also connected to the flue gas jacket of the drying chamber through a pipeline.

3. The activated carbon energy-saving carbonization system as described in claim 2, characterized in that: The flue gas interlayer is equipped with a serpentine coil, the inlet of which is connected to the flue gas duct, and the outlet of which is connected to the combustion chamber via a duct.

4. The activated carbon energy-saving carbonization system as described in claim 2, characterized in that: The negative pressure pipeline includes branch pipelines, a main pipeline, and a negative pressure fan. The air inlet of the branch pipeline is connected to the drying chamber, the air outlet of the branch pipeline is connected to one end of the main pipeline, the other end of the main pipeline is connected to the combustion chamber, and the negative pressure fan is installed on the main pipeline.

5. The activated carbon energy-saving carbonization system as described in claim 1, characterized in that: The rotary kiln includes a feeding section, a carbonization section, and a discharge section. The flue gas pipe is connected to the feeding section of the rotary kiln, and the steam pipe is connected to the discharge section of the rotary kiln. The carbonization section is located in the middle of the rotary kiln.

6. The activated carbon energy-saving carbonization system as described in claim 1, characterized in that: The preheating chamber is equipped with a screw conveyor to control the amount of activated carbon conveyed. The bottom of the preheating chamber is inclined towards the feed inlet of the rotary kiln, and the screw of the screw conveyor is parallel to the bottom of the preheating chamber to facilitate the conveying of activated carbon.

Images