A system and method for pulverizing and feeding activated carbon powder

Abstract

The application provides a pulverizing and feeding system for activated carbon and a use method, which comprises a pulverizing system, a feeding system and a incineration system, the pulverizing system comprises a grinder, a discharging channel is arranged below the grinder, the feeding system comprises a separator and a fan, an air suction port and an air outlet are arranged on the fan, the air suction port is connected to the discharging channel, the air outlet is connected to the separator through a pipeline, a discharging port and a circulating port are arranged on the separator, the circulating port is connected to the grinder through a pipeline, an inlet and an external heat exchanger are arranged on the outer wall of the grinder, a grinding disc, a belt wheel and a grinding roller are arranged in the grinder, the discharging channel is communicated with the grinder and is located below the grinding disc, the water consumption is reduced, the operation cost is effectively reduced, the waste activated carbon directly enters the incineration system without water, the heat value is increased, the water entering the incineration system is avoided, the operation cost is further reduced.

Description

Technical Field

[0001] This invention relates to the field of waste activated carbon treatment technology, specifically to a system and method for pulverizing and feeding activated carbon. Background Technology

[0002] Currently, the common method for treating waste activated carbon is incineration followed by landfill. However, the actual treatment effect is that incineration only removes the adsorbed organic matter; the quality of the activated carbon itself does not decrease significantly. The unburned activated carbon is then landfilled as waste residue. This wastes the calorific value of the activated carbon and greatly increases the cost of waste residue treatment. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a dedicated activated carbon pulverization and feeding system and its usage method. By reducing water consumption, it effectively lowers operating costs. Waste activated carbon enters the incineration system directly without moisture, increasing its calorific value and preventing moisture from entering the incineration system and causing cooling, further reducing operating costs.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A system specifically designed for pulverizing and feeding activated carbon, characterized in that it comprises a pulverizing system, a feeding system, and an incineration system. The pulverizing system includes a mill with a discharge channel installed below it. The feeding system includes a separator and a blower. The blower has an exhaust port and an exhaust port. The exhaust port is connected to the discharge channel, and the exhaust port is connected to the separator via a pipe. The separator has an exhaust port and a circulation port. The circulation port is connected to the mill via a pipe. The mill has an inlet and an external heat exchanger on its outer wall. A grinding disc, pulleys, and grinding rollers are installed inside the mill. The grinding disc and grinding roller are connected by a pulley for transmission. When the waste activated carbon enters the mill through the feed inlet, it is ground by the grinding disc. The discharge channel is connected to the mill and located below the grinding disc. The ground waste activated carbon falls into the discharge channel. After the waste activated carbon falls into the discharge channel, the blower extracts the waste activated carbon through the exhaust port and transports it to the separator through the exhaust port. After separation by the separator, the waste activated carbon larger than the preset particle radius enters the mill again through the circulation port for grinding, while the waste activated carbon smaller than the preset radius is discharged through the discharge port and transported to the incineration system for incineration.

[0006] In the above structure: the present invention proposes a dedicated activated carbon pulverizing and feeding system, including a pulverizing system, a feeding system, and an incineration system. The pulverizing system includes a mill with a discharge channel installed below it. The feeding system includes a separator and a blower. The blower transports the waste activated carbon from the discharge channel to the separator for separation and screening. The discharge channel is located below the mill and communicates with the inside of the mill. An inlet and an external heat exchanger are provided on the outer wall of the mill. A grinding disc, pulleys, and grinding rollers are installed inside the mill. The grinding rollers are driven by a motor. The mill rotates through a belt drive connecting the grinding disc and the grinding roller. When the waste activated carbon enters the mill through the feed inlet, it is ground by the grinding disc. The ground waste activated carbon falls into the discharge channel. After the waste activated carbon falls into the discharge channel, the blower extracts the waste activated carbon through the exhaust port and transports it to the separator through the exhaust port. After separation by the separator, the waste activated carbon particles larger than the preset particle radius re-enter the mill through the circulation port for grinding, while the waste activated carbon particles smaller than the preset radius are discharged through the discharge port and transported to the incineration system for incineration.

[0007] When grinding waste activated carbon in a mill, the squeezing and friction of the grinding discs cause heat to accumulate throughout the grinding area, leading to a temperature rise in the grinding area. At this time, it is necessary to spray cooling liquid onto the grinding area. Currently, the most widely used method is to spray water onto the grinding area and mix the ground waste activated carbon to make a slurry. The resulting slurry enters the slurry tank and is sprayed into the incineration system through a spray gun. However, this invention eliminates the slurry-making step. Specifically, an external heat exchanger is installed around the grinding area of ​​the mill. The external heat exchanger is filled with a heat exchange liquid with good thermal conductivity, such as water, to absorb the temperature of the grinding chamber shell. The grinding disc and grinding rollers are hollow and internally circulate water to absorb the heat generated by the grinding rollers.

[0008] As a preferred embodiment of the present invention, it further includes a return air port, which is located on the outer wall of the mill.

[0009] In the above structure, the mill needs to be equipped with gas protection or form a negative pressure to prevent the organic matter adsorbed in the waste activated carbon from escaping when grinding the waste activated carbon. Therefore, this application has a return air port on the outer wall of the mill to deliver pressurized air into the mill through the return air port.

[0010] As a preferred embodiment of the present invention, it further includes a base bracket, and the discharge channel is fixedly installed above the base bracket.

[0011] In the above structure: the base bracket is used to install and fix the discharge channel to the mill, so as to facilitate its operation.

[0012] As a preferred embodiment of the present invention, it further includes an analyzer connected to a separator.

[0013] In the above structure: the analyzer is used to control the separator to perform separation. Through the separation of the separator, the size of the waste activated carbon after grinding can be effectively distinguished. Waste activated carbon larger than the preset particle radius enters the mill again for grinding through the circulation port, while waste activated carbon smaller than the preset radius particles is discharged through the discharge port.

[0014] As a preferred technical solution of the present invention, it also includes a motor, the output shaft of which is connected to the grinding roller. The grinding roller is driven by the motor, thereby driving the grinding disc to rotate and realize grinding.

[0015] In the above structure: the output shaft of the motor is connected to the grinding roller to provide power to the grinding roller. After being driven by the motor, the grinding roller drives the grinding disc to rotate, thereby realizing the grinding of waste activated carbon.

[0016] As a preferred embodiment of the present invention: the external heat exchanger includes a sealed housing, which is mounted around the outer wall of the mill, and the sealed housing is filled with a heat exchange liquid.

[0017] As a preferred technical solution of the present invention: both the grinding disc and the grinding roller are hollow structures, and the grinding disc and the grinding roller are respectively filled with cooling liquid.

[0018] In the above structure: to achieve heat dissipation in the grinding area of ​​the mill, an external heat exchanger is installed on its outer wall. The external heat exchanger includes a sealed shell, which is installed around the outer wall of the mill. The sealed shell is filled with heat exchange liquid, which can achieve heat exchange in the grinding area, thereby achieving heat dissipation. The grinding disc and grinding roller are both hollow structures, and the grinding disc and grinding roller are filled with cooling liquid, which can further achieve the heat dissipation effect in the grinding area of ​​the mill.

[0019] A method for using a system specifically designed for pulverizing and feeding activated carbon is characterized by the following steps: waste activated carbon is conveyed to a crusher for crushing; the crushed waste activated carbon enters a silo through a sealed pipe; from the silo, it enters a vibrating feeder; the vibrating feeder uniformly and continuously feeds the waste activated carbon into the feed inlet of a mill; the grinding rollers in the mill achieve the purpose of pulverization; the fine powder after grinding the waste activated carbon is carried by the circulating air of the blower to an analyzer for sorting; the waste activated carbon that is too coarse falls back into the mill for regrinding; the qualified waste activated carbon fine powder enters the incineration system for incineration through three methods.

[0020] The first method: qualified waste activated carbon fine powder enters the cyclone feeder with the airflow, is conveyed to the spray gun by the blower, and is discharged into the incineration system for incineration through the spray gun;

[0021] The second method involves directly conveying qualified waste activated carbon powder to the incineration system via a blower for combustion.

[0022] The third method involves qualified waste activated carbon powder falling into a pit, being grabbed by a grab bucket and fed into a chain conveyor, which then transports it to the incineration system for combustion.

[0023] As a preferred technical solution of the present invention: when the crusher is crushing waste activated carbon, oxygen is supplied to the crusher so that the crusher has gas protection or forms negative pressure.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] Compared to the heat dissipation during pulping in existing technologies, this invention uses an external heat exchanger for heat dissipation, which can effectively reduce water consumption and lower operating costs. The waste activated carbon enters the incineration system directly without moisture, increasing its calorific value and preventing moisture from entering the incineration system and causing cooling, further reducing operating costs.

[0026] The advantages of the feeding system in this invention are: low maintenance cost and small initial investment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a system specifically designed for activated carbon pulverization and feeding.

[0028] Figure 2 This is a side view diagram of a system specifically designed for activated carbon pulverization and feeding.

[0029] Figure 3 This is a flowchart specifically designed for activated carbon pulverization and feeding systems.

[0030] List of reference numerals in the attached diagram:

[0031] 1. Mill; 1.1. Feed inlet; 1.2. Grinding disc; 1.3. Pulley; 1.4. Air return port; 1.5. External heat exchanger; 1.6. Grinding roller; 1.7. Analyzer; 2. Separator; 3. Fan; 4. Base support. Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] like Figure 1-2As shown, this invention proposes a dedicated activated carbon pulverizing and feeding system, including a pulverizing system, a feeding system, and an incineration system. The pulverizing system includes a mill 1 with a discharge channel installed below it. The feeding system includes a separator 2 and a blower 3. The blower 3 is equipped with an exhaust port and an exhaust port. The exhaust port is connected to the discharge channel, and the exhaust port is connected to the separator 2 via a pipe. The separator 2 is equipped with an exhaust port and a circulation port. The circulation port is connected to the mill 1 via a pipe. The outer wall of the mill 1 is equipped with an inlet 1.1 and an external heat exchanger 1.5. The mill 1 is equipped with a grinding disc 1.2, a pulley 1.3, and a grinding roller 1. 6. The grinding disc 1.2 and the grinding roller 1.6 are connected by a pulley 1.3 to achieve transmission. When the waste activated carbon enters the mill 1 through the feed port 1.1, it is ground by the grinding disc 1.2. The discharge channel is connected to the mill 1 and is located below the grinding disc 1.2. The ground waste activated carbon falls into the discharge channel. After the waste activated carbon falls into the discharge channel, the blower 3 extracts the waste activated carbon through the exhaust port and transports it to the separator 2 through the exhaust port. After separation by the separator 2, the waste activated carbon with a particle radius larger than the preset particle radius re-enters the mill 1 for grinding through the circulation port, and the waste activated carbon with a particle radius smaller than the preset radius is discharged through the discharge port and transported to the incineration system for incineration.

[0034] The pulverizing system also includes a crusher and a vibrating feeder for crushing and conveying the waste activated carbon in the early stage. The particle hardness of waste activated carbon is generally between 0.3 and 0.8 N / particle, and the skeleton hardness is between 0.35 and 0.85 N / cm2. Therefore, when crushing waste activated carbon, a conventional double-roll crusher can be selected. The crusher needs to be equipped with gas protection or form a negative pressure to prevent the organic matter adsorbed in the waste activated carbon from escaping during crushing. After crushing, the waste activated carbon enters the hopper in a sealed pipe. From the hopper, it enters the vibrating feeder and is fed evenly and continuously into the grinding area of ​​the mill 1. Due to the centrifugal force during rotation, the grinding roller 1.6 swings outward and presses tightly against the grinding ring. The material is fed through the feed port between the grinding roller 1.6 and the grinding ring. The pulverizing purpose is achieved by the rolling of the grinding roller 1.6.

[0035] This invention proposes a dedicated activated carbon pulverization and feeding system, comprising a pulverization system and a feeding system. The pulverization system includes a mill 1 with a discharge channel installed below it. The feeding system includes a separator 2 and a blower 3. The blower 3 transports the waste activated carbon from the discharge channel to the separator 2 for separation and screening. The discharge channel is located below the mill 1 and communicates with its interior. The outer wall of the mill 1 is provided with a feed inlet 1.1 and an external heat exchanger 1.5. Inside the mill 1, a grinding disc 1.2, a pulley 1.3, and a grinding roller 1.6 are installed. The grinding roller 1.6 is driven by a motor to rotate. Communication is established between the grinding disc 1.2 and the grinding roller 1.6. The transmission is achieved through the pulley 1.3. When the waste activated carbon enters the mill 1 through the feed port 1.1, it is ground by the grinding disc 1.2. The ground waste activated carbon falls into the discharge channel. After the waste activated carbon falls into the discharge channel, the blower 3 extracts the waste activated carbon through the exhaust port and transports it to the separator 2 through the exhaust port. After being separated by the separator 2, the waste activated carbon larger than the preset particle radius enters the mill 1 again through the circulation port for grinding, while the waste activated carbon smaller than the preset radius particles is discharged through the discharge port and transported to the incineration system for incineration. After being ground into 500-10 mesh particles, the waste activated carbon enters the feeding system.

[0036] When grinding waste activated carbon in mill 1, the squeezing and friction effect of the grinding disc 1.2 will cause heat to accumulate in the entire grinding area of ​​mill 1, resulting in a rise in the temperature of the grinding area. At this time, it is necessary to spray cooling liquid on the grinding area. The most widely used method is to spray water on the grinding area and mix the ground waste activated carbon to make a slurry. The slurry is then injected into the incineration system through a spray gun into a slurry tank. However, the present invention can eliminate the slurry making step. Specifically, an external heat exchanger 1.5 is installed on the periphery of the grinding area on mill 1. The external heat exchanger 1.5 is filled with a heat exchange liquid with good thermal conductivity, such as water, to absorb the temperature of the grinding chamber shell. The grinding disc 1.2 and the grinding roller 1.6 are hollow and internally circulated with water to absorb the heat generated by the grinding roller 1.6.

[0037] In this embodiment, a return air port 1.4 is also included, which is located on the outer wall of the mill 1. The mill 1 needs to be equipped with gas protection or form a negative pressure to prevent the organic matter adsorbed in the waste activated carbon from escaping during grinding. Therefore, this application provides a return air port 1.4 on the outer wall of the mill 1 to supply pressurized air into the mill 1.

[0038] In this embodiment, a base bracket 4 is also included, and the discharge channel is fixedly installed above the base bracket 4. The base bracket 4 is used to install and fix the discharge channel to the mill 1, facilitating its operation.

[0039] In this embodiment, an analyzer 1.7 is also included, which is connected to the separator 2. The analyzer 1.7 is used to control the separator 2 to perform separation. Through the separation of the separator 2, the size of the ground waste activated carbon can be effectively distinguished. Waste activated carbon larger than the preset particle radius enters the mill 1 again for grinding through the circulation port, while waste activated carbon smaller than the preset radius is discharged through the discharge port.

[0040] In this embodiment, a motor is also included. The output shaft of the motor is connected to the grinding roller 1.6. The grinding roller 1.6 is driven by the motor, thereby causing the grinding disc 1.2 to rotate, thus achieving grinding. The output shaft of the motor is connected to the grinding roller 1.6 to provide power to the grinding roller 1.6. After being driven by the motor, the grinding roller 1.6 drives the grinding disc 1.2 to rotate, thereby achieving the grinding of waste activated carbon.

[0041] In this embodiment: the external heat exchanger 1.5 includes a sealed housing, which is mounted around the outer wall of the mill 1, and the sealed housing is filled with heat exchange liquid.

[0042] Both the grinding disc 1.2 and the grinding roller 1.6 are hollow structures, and each is filled with cooling liquid.

[0043] To achieve heat dissipation in the grinding area of ​​mill 1, an external heat exchanger 1.5 is installed on its outer wall. The external heat exchanger 1.5 includes a sealed shell, which is installed around the outer wall of mill 1. The sealed shell is filled with heat exchange liquid, which can achieve heat exchange in the grinding area and thus heat dissipation. The grinding disc 1.2 and the grinding roller 1.6 are both hollow structures, and the grinding disc 1.2 and the grinding roller 1.6 are respectively filled with cooling liquid, which can further improve the heat dissipation effect in the grinding area of ​​mill 1.

[0044] like Figure 3 As shown, the present invention also proposes a method for using a system for pulverizing and feeding activated carbon, comprising the following steps: waste activated carbon is conveyed to a crusher for crushing; the crushed waste activated carbon enters a silo through a sealed pipe; from the silo, it enters a vibrating feeder; the vibrating feeder uniformly and continuously feeds the waste activated carbon into the feed inlet 1.1 of the mill 1; the grinding rollers 1.6 inside the mill 1 achieve the purpose of pulverization; the fine powder after grinding of the waste activated carbon is carried by the circulating air of the blower 3 to the analyzer 1.7 for sorting; the waste activated carbon that is too coarse falls back into the mill 1 for regrinding; the qualified waste activated carbon fine powder enters the incineration system for incineration through three methods;

[0045] The first method: qualified waste activated carbon fine powder enters the cyclone feeder with the airflow, is conveyed to the spray gun by the blower 3, and is discharged into the incineration system for incineration through the spray gun;

[0046] The second method: qualified waste activated carbon fine powder is directly transported to the incineration system for incineration by blower 3;

[0047] The third method involves qualified waste activated carbon powder falling into a pit, being grabbed by a grab bucket and fed into a chain conveyor, which then transports it to the incineration system for combustion.

[0048] When crushing waste activated carbon, oxygen is supplied to the crusher to provide gas protection or create negative pressure.

[0049] Advantages of a qualified waste activated carbon fine powder conveying method:

[0050] The advantage of the first method is that the waste activated carbon is sprayed out by a spray gun, so the incineration equipment can be freely selected: for example, it can be sprayed from the kiln head of a rotary kiln; from the bottom of the secondary combustion chamber; from the RTO combustion chamber; or from the combustion boiler, which can adapt to different incineration systems.

[0051] The advantages of the second type are: low maintenance costs and low initial investment.

[0052] The advantages of the third option are: minimal initial investment and lowest maintenance costs.

[0053] Compared to the heat dissipation during pulping in the prior art, this invention uses an external heat exchanger 1.5 for heat exchange, which can effectively reduce water consumption and lower operating costs. The waste activated carbon enters the incineration system directly without moisture, increasing its calorific value and preventing moisture from entering the incineration system and causing cooling, further reducing operating costs.

[0054] The advantages of the feeding system in this invention are: low maintenance cost and small initial investment.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any modifications or equivalent changes made based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A method of using a system specifically designed for pulverizing and feeding activated carbon, the system comprising a pulverizing system, a feeding system, and an incineration system, wherein the pulverizing system comprises a mill (1), a discharge channel is installed below the mill (1), the feeding system comprises a separator (2) and a blower (3), the blower (3) is provided with an exhaust port and an exhaust port, the exhaust port is connected to the discharge channel, the exhaust port is connected to the separator (2) via a pipe, the separator (2) is provided with an exhaust port and a circulation port, the circulation port is connected to the mill (1) via a pipe, the outer wall of the mill (1) is provided with an inlet (1.1) and an external heat exchanger (1.5), and a grinding disc (1.2) and a pulley (1.3) are installed inside the mill (1). The grinding roller (1.6) and the grinding disc (1.2) are connected by a pulley (1.3) to achieve transmission. When the waste activated carbon enters the mill (1) through the feed port (1.1), it is ground by the grinding disc (1.2). The discharge channel is connected to the mill (1) and located below the grinding disc (1.2). The ground waste activated carbon falls into the discharge channel. When the waste activated carbon falls into the discharge channel, the blower (3) extracts the waste activated carbon through the exhaust port and transports it to the separator (2) through the exhaust port. After separation by the separator (2), the waste activated carbon with a particle radius larger than the preset particle radius enters the mill (1) again through the circulation port for grinding, and the waste activated carbon with a particle radius smaller than the preset radius is discharged through the discharge port and transported to the incineration system for incineration. The process includes the following steps: waste activated carbon is transported to a crusher for crushing, the crushed waste activated carbon enters the silo through a sealed pipe, and enters the vibrating feeder from the silo. The vibrating feeder feeds the waste activated carbon evenly and continuously into the feed inlet (1.1) of the mill (1). The grinding roller (1.6) in the mill (1) rolls to achieve the purpose of crushing. The fine powder after grinding the waste activated carbon is carried by the circulating air of the blower (3) into the analyzer (1.7) for sorting. The waste activated carbon that is too coarse falls back into the mill (1) for regrinding. The qualified waste activated carbon fine powder enters the incineration system for incineration through three methods. The first type: qualified waste activated carbon fine powder enters the cyclone feeder with the airflow, is transported to the spray gun by the blower (3), and is discharged into the incineration system for incineration through the spray gun; The second method: qualified waste activated carbon fine powder is directly transported to the incineration system for incineration by a blower (3); The third method involves qualified waste activated carbon powder falling into a pit, being grabbed by a grab bucket and fed into a chain conveyor, which then transports it to the incineration system for combustion.

2. The use of a system for pulverizing and feeding activated carbon according to claim 1, characterized in that, When crushing waste activated carbon, inert gas is supplied to the crusher for protection, so that the crusher has gas protection or forms negative pressure.

3. The use of a system for pulverizing and feeding activated carbon according to claim 1, characterized in that, It also includes a return air port (1.4), which is located on the outer wall of the mill (1).

4. The method of using a system for pulverizing and feeding activated carbon according to claim 1, wherein: It also includes a base bracket (4), and the discharge channel is fixedly installed above the base bracket (4).

5. The method of using a system for pulverizing and feeding activated carbon exclusively, as claimed in claim 1, wherein: It also includes an analyzer (1.7), which is connected to the separator (2).

6. The method of using a system for pulverizing and feeding activated carbon exclusively, as claimed in claim 1, wherein: It also includes a motor, the output shaft of which is connected to a grinding roller (1.6). The grinding roller (1.6) is driven by the motor, thereby driving the grinding disc (1.2) to rotate and achieve grinding.

7. The method of using a system for pulverizing and feeding activated carbon exclusively according to claim 1, characterized in that: The external heat exchanger (1.5) includes a sealed housing that is mounted around the outer wall of the mill (1) and is filled with a heat exchange liquid.

8. The method of using a system for pulverizing and feeding activated carbon exclusively according to claim 1, characterized in that: Both the grinding disc (1.2) and the grinding roller (1.6) are hollow structures, and the grinding disc (1.2) and the grinding roller (1.6) are respectively filled with cooling liquid.

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