Sequencing batch production process for high-temperature desorption and activation regeneration of activated carbon

Abstract

The sequencing batch production process comprises a vertical kiln body, a high-level material level controller and a low-level material level controller are arranged on the vertical kiln body, a feeding port and an exhaust port are formed in the top of the vertical kiln body, a discharging port is formed in the bottom of the vertical kiln body, the feeding port is connected with a quantitative bin through a material pipeline, and the quantitative bin is connected with the exhaust port through a material pipeline. The quantitative bin is connected with a feeding port through a feeding pipeline, the discharging port is connected with a discharging mechanism through a discharging pipeline, the quantitative bin and the discharging mechanism are each provided with an inert gas purging assembly, the feeding port and the discharging port are each provided with a closed valve, the vertical kiln body is divided into an upper part, a middle part and a lower part, the upper part is a preheating area, the middle part is a high-temperature area, and the lower part is a cooling area. According to the invention, a vertical kiln structure is adopted, sequencing batch feeding is adopted, and inert gas is used for creating an anaerobic regeneration environment; gas generated by the gas high-temperature reduction reaction is taken out as carrier gas to take out desorption gas.

Description

Technical Field

[0001] The invention relates to the field of high-temperature desorption and activation regeneration of activated carbon, and in particular to a sequential batch production process for high-temperature desorption and activation regeneration of activated carbon. Background Art

[0002] At present, in projects dealing with environmental protection projects, the broad-spectrum characteristics of granular activated carbon are widely used to adsorb pollutants, such as the adsorption of VCOs and tar in the waste gas industry; and the adsorption of organic matter, color substances, odors, etc. in the wastewater industry. Generally, the desorption temperature of activated carbon should be lower than 120℃~150℃, which is restricted by its physical properties, adsorbed substances, fire safety, site occupation, etc. Even after multiple conventional low-temperature desorption, it is difficult to completely remove the adsorbate. The continuous accumulation of adsorbate leads to a gradual decrease in the subsequent adsorption and desorption efficiency of activated carbon. Especially when the adsorbate contains high boiling point and oil, there are common problems such as easy clogging of activated carbon, low adsorption efficiency, difficulty in desorption and poor safety.

[0003] According to previous fixed activated carbon desorption in an aerobic environment, after supersaturated adsorption of VOCs, when the desorption temperature rises rapidly to 180-200°C, due to uneven heat conduction of the carbon pile, the local temperature is abnormally high, and there is a high probability that the activated carbon will ignite. After multiple tests, it was confirmed that this method is not feasible.

[0004] At present, the desorption of activated carbon is mainly carried out in a rotary kiln structure. However, the desorption and activation of the rotary kiln structure causes uneven accumulation of activated carbon inside, uneven heating, uncontrollable heating time and temperature per unit of activated carbon, and uncontrollable steam volume per unit of activated carbon, resulting in low activated carbon yield and poor activation efficiency.

[0005] Patent CN202021684645.9 discloses a stacked in-situ thermal desorption heating device, which generates heat through a combustion device and conducts heat to a stacked heat sink through a pipe wrapped in an insulating material. The heat sink is distributed and inserted into the adsorbent or other medium that needs to be desorbed to directly heat the material. The defects of this patent are: the volume of the material pile is too large, the thermal conductivity efficiency of the particles is low, the desorption time is long, the energy consumption is high, and the equipment investment cost is high; in a non-anaerobic environment, the adsorbent and the release material have certain flammability, and the local temperature near the heat sink is too high, which poses certain safety hazards. Summary of the invention

[0006] The purpose of the present invention is to provide a high-temperature desorption and activation regeneration sequencing batch production process for activated carbon.

[0007] The innovation of the present invention lies in the use of a vertical kiln structure and batch feeding, so that the activated carbon is evenly distributed in the vertical kiln body, the heating time, heating temperature and gas introduction amount can be accurately controlled, the yield and activity of the activated carbon are greatly improved, and an anaerobic regeneration environment is created with inert gas; the gas generated by the high-temperature reduction reaction of the gas is used as a carrier gas to carry out the desorbed gas.

[0008] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is:

[0009] A high-temperature desorption and activation regeneration sequencing batch production process for activated carbon, characterized in that it comprises a vertical kiln body, the three-dimensional kiln body is provided with a high-level material level controller and a low-level material level controller, the top of the vertical kiln body is provided with a feed port and an exhaust port, the bottom is provided with a discharge port, the feed port is connected to a quantitative bin through a material pipeline, the discharge port is connected to a discharge mechanism through a discharge pipeline, the quantitative bin and the discharge mechanism are both provided with an inert gas purge assembly, the feed port and the discharge port are both provided with a closed valve, the vertical kiln body is divided into an upper heating zone and a lower cooling zone, and the heating zone is provided with a gas inlet pipe;

[0010] When desorbing at high temperature of 200℃-500℃:

[0011] (1) Introduce gas from the gas inlet pipe, turn on the heating zone, and control the temperature of the heating zone between 200 and 500°C;

[0012] (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism;

[0013] (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform desorption treatment. During desorption, the gas is used as a carrier gas to take away the desorbed organic gas and discharge it from the exhaust port. After the set time t, open the sealed valve at the discharge port to start discharging. After the discharge reaches the low-level material level controller and gives a sensing signal, close the sealed valve at the discharge port to stop discharging;

[0014] (4) Steps (2) and (3) are repeated continuously, the activated carbon discharged previously that has not been completely heated and cooled is discarded, and the activated carbon that has been completely heated and cooled is collected.

[0015] Furthermore, the heating zone is divided into a preheating zone and a high temperature zone from top to bottom, and the gas inlet pipe is located in the high temperature zone;

[0016] When desorbing at high temperature of 200℃-500℃:

[0017] (1) Introduce gas from the gas inlet pipe, open the preheating zone and the high temperature zone, control the temperature of the preheating zone at 200±25℃, and control the temperature of the high temperature zone between 300 and 500℃;

[0018] (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism;

[0019] (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform desorption treatment. During desorption, the gas is used as a carrier gas to take away the desorbed organic gas and discharge it from the exhaust port. After the set time t, open the sealed valve at the discharge port to start discharging. After the discharge reaches the low-level material level controller and gives a sensing signal, close the sealed valve at the discharge port to stop discharging;

[0020] (4) Repeat steps (2) and (3) continuously, discard the activated carbon that has not been completely preheated, desorbed and cooled, and collect the activated carbon that has been completely preheated, desorbed and cooled; when activated and regenerated at 800-1000°C:

[0021] (1) Introduce gas from the gas inlet pipe, open the preheating zone and the high temperature zone, control the temperature of the preheating zone at 200±25℃, and control the temperature of the high temperature zone between 800 and 1000℃;

[0022] (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism;

[0023] (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform activation treatment. During activation, the gas is used as an activator and takes away the gas and carbon ash generated by the activation reaction and is discharged from the exhaust port. After a set time t, open the sealed valve at the discharge port to start discharging. After the low-level material level controller gives a sensing signal, close the sealed valve at the discharge port to stop discharging;

[0024] (4) Steps (2) and (3) are continuously repeated, and the activated carbon discharged previously that has not undergone complete preheating, activation and cooling is discarded, while the activated carbon that has undergone complete preheating, desorption and cooling processes is collected.

[0025] Furthermore, during activation regeneration, compressed air is introduced into the high temperature zone to cause an incomplete oxidation reaction.

[0026] Furthermore, the high temperature zone is heated by a heating furnace, which is a regenerative thermal oxidation furnace or a regenerative catalytic combustion furnace.

[0027] Furthermore, the outer wall of the vertical kiln body located in the heating furnace is provided with a plurality of heat exchanger fins. The thermal conductivity of air is very poor (λ=0.022-0.026W / m·K under standard conditions); the heat exchanger fins are extended outside the cavity in the high temperature area to facilitate heat exchange between the hot air and the heat exchanger fins, and convert the heat of the burner flame into an increase in the temperature of the heat exchanger fins.

[0028] Furthermore, the vertical kiln body is provided with a plurality of heat exchanger plates in the high temperature zone. The thermal conductivity of carbon is very poor (λ=0.17-0.28W / m·K under standard conditions). It is difficult to fully heat the carbon in the high temperature zone to the average temperature in a short time, and the only way is to increase the heat exchange contact area; the thermal conductivity of metal is very good (λ=73.3W / m·K under standard conditions). The heat exchanger plates are inserted into the inner cavity to fully contact the activated carbon, which is convenient and fast to convert heat into the overall average temperature rise of the activated carbon, shorten the unit desorption time, and facilitate the flow of carbon in the gravity direction.

[0029] Furthermore, the gas discharged from the exhaust port is dedusted by the high-temperature dust collector and then passed into the pressure gas tank. The inert gas purge component purges the quantitative bin and the discharging mechanism and then the purged gas is passed into the pressure gas tank. The pressure gas tank is then fed with the balancing air volume gas, and the pressure gas tank supplies gas to the heating furnace. The carrier gas and the desorbed gas are returned to the incinerator as supplementary fuel to release energy, and provide heat for the high-temperature zone, so that the system reaches a thermodynamic balance, reduces the system input energy consumption, and the system's waste gas exhaust balancing system, which neither wastes energy nor ensures system safety.

[0030] Furthermore, the preheating zone is preheated by heat exchange tubes. The steam in the preheating zone enters at a low temperature and exits at a high temperature. The temperature at the bottom of the preheating zone near the high temperature zone is higher, which can save energy loss in the high temperature zone. At the same time, the preheating zone is maintained at 200℃±25℃, which can desorb and discharge low-boiling point VOCs organic matter in advance, avoiding concentrated release in a unit time, causing the post-incinerator to stage sudden temperature surge peaks to trigger program alarms, and suppressing safety hazards of the system.

[0031] Furthermore, the gas is air, nitrogen, carbon dioxide or water vapor; the gas is introduced from near the bottom of the high temperature zone; a compressed air inlet pipe is also provided in the high temperature zone, and the compressed air in the compressed air inlet pipe is introduced from the middle section of the high temperature zone.

[0032] Air, nitrogen, carbon dioxide or water vapor can react with carbon to produce:

[0033] 2C+O2==2CO (reaction temperature 700-800℃, insufficient oxygen)

[0034] N2+2C==2CN (reaction temperature 1000℃)

[0035] CO2+C==2CO (reaction temperature 700-1000℃)

[0036] H2O(g)+C==CO+H2 (reaction temperature 800℃-1000℃)

[0037] The gas introduced into the bottom of the high temperature zone is partially used as reducing gas and the other part as carrier gas, which drives high boiling point VOCs, tar mist and high temperature to the upper exhaust port, while isolating the possibility of oxygen from the lower part entering the desorption regeneration zone, thereby improving the safety factor.

[0038] Here, compressed air is used as supplementary oxygen to oxidize the partially reduced active gas to release a large amount of heat, save the energy of the burner, raise the temperature rise curve of the high temperature zone in a short time, and add a control method for manual intervention system:

[0039] 2H2+O2==2H2O+a lot of heat

[0040] 2C+O2==2CO+a lot of heat

[0041] CN is stable and does not react with O2 (replace it with insufficient oxygen).

[0042] Furthermore, the connection between the wall of the preheating zone and the wall of the high temperature zone, and between the wall of the high temperature zone and the wall of the cooling zone are separated by a heat insulation layer. The preheating zone only needs 200℃±25℃ to reach the normal desorption temperature, and its temperature does not need to be too high; the desorption regeneration zone needs to lock the heat to ensure the minimum temperature corresponding to the reduction reaction, and does not allow a large amount of heat loss; the cooling zone needs to be cooled rapidly to 150-200℃, so the benign heat conduction between the walls of each zone needs to be blocked, and the upper and lower connections must be separated by a heat insulation layer.

[0043] The beneficial effects of the present invention are:

[0044] 1. The present invention adopts a vertical kiln structure and batch feeding, so that the activated carbon is evenly distributed in the vertical kiln body, the heating time, heating temperature and gas introduction amount can be accurately controlled, and the yield of activated carbon is greatly improved.

[0045] 2. In the present invention, heat exchange tubes are used for preheating in the preheating zone, and low-cost water vapor can be produced in the heat exchange tubes to desorb organic matter adsorbed in the activated carbon. On the one hand, coking in the high-temperature zone can be avoided, and on the other hand, heat consumption in the high-temperature zone can be reduced.

[0046] 3. In the present invention, the high temperature zone is flexibly adjusted by using external heat or a combination of external heat and internal heat. When desorption is required, external heat is selected, and when regeneration and activation are required, internal heat or internal heat plus external heat is selected.

[0047] 4. The present invention is particularly suitable for the continuous batch centralized regeneration of mobile granular adsorbents, which prolongs the total life of the activated carbon adsorption stage, improves equipment utilization, and facilitates uninterrupted production.

[0048] 5. The present invention can significantly increase the desorption temperature and release more high-boiling-point VOCs pollutants in a shorter unit time.

[0049] 6. Under the premise of ensuring the safe operation of the device, the present invention improves the tolerable desorption temperature of the equipment, thereby expanding the adsorption activation capacity of the granular adsorbent, while reducing the batch frequency of replacing the adsorbent and saving environmental protection operation and maintenance costs.

[0050] 7. The unique design structure of the present invention uses indirect heating of activated carbon to isolate the hot carbon from the air and reduce the potential safety hazard of temperature rise during desorption and regeneration.

[0051] 8. The equipment of the present invention has a compact structure and occupies a small area. It can be attached to the outer wall of the factory building, which is convenient for hoisting into place and shortens the on-site installation period.

[0052] 9. The equipment in the present invention is provided with a segmented control temperature sensor and a material level display, and relies on an integrated program to interlock with the gas quantitative control, with a high degree of mechanical automation and a low failure rate.

[0053] 10. The equipment in the present invention can deal with VOCs waste gas mixed with certain special ingredients, such as waste gas containing grease droplets, metal powder, and floating dust; at the same time, it can also regenerate granular waste activated carbon with a high moisture content from certain sewage treatment plants.

[0054] 11. The equipment in the present invention has high processing efficiency and low failure rate during desorption. The volume of adsorbent processed in a single batch is small, so the amount of concentrated exhaust gas released is also small, which can make the subsequent VOCs incineration treatment equipment miniaturized; the high-temperature zone is placed in the center of the incineration equipment, and the incineration heat energy is cleverly used to continuously heat the high-temperature zone, achieving thermal balance between the two and reducing the output energy consumption of the incinerator.

[0055] 12. The equipment of the present invention has a wide range of applications and can be applied to the regeneration of certain specific types of granular adsorbents, such as activated carbon, molecular sieves, zeolites, etc.

[0056] 13. In the present invention, the carrier gas and the desorbed gas are returned to the incinerator as supplementary fuel to release energy, and provide heat for the high-temperature zone, so that the system reaches a thermodynamic balance, reduces the system input energy consumption, and the system's waste gas exhaust balancing system, which neither wastes energy nor ensures system safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the structure of Example 1.

[0058] Figure 2This is a schematic diagram of the structure of Example 2.

[0059] Figure 3 This is a schematic diagram of the structure of Example 3.

[0060] Figure 4 This is a schematic diagram of the structure of Example 4. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0062] Example 1: Figure 1 As shown, a high-temperature desorption and activation regeneration sequencing batch production process of activated carbon includes a vertical kiln body 1, a high-level material controller 2 and a low-level material controller 3 are provided on the three-dimensional kiln body 1, a feed port 4 and an exhaust port 5 are provided on the top of the vertical kiln body 1, and a discharge port 6 is provided on the bottom, the feed port 4 is connected to a quantitative bin 8 through a material pipeline 7, and the discharge port 6 is connected to a discharge mechanism 9 through a discharge pipeline 6, an inert gas purge component 10 is provided at the quantitative bin 8 and the discharge mechanism 9, and a closed valve 11 is provided at the feed port 4 and the discharge port 6, the vertical kiln body 1 is divided into an upper heating zone and a lower cooling zone 1.3, the heating zone is divided into a preheating zone 1.1 and a high-temperature zone 1.2 from top to bottom, a gas inlet pipe 12 is located in the high-temperature zone 1.2, and the connections between the wall of the preheating zone 1.1 and the wall of the high-temperature zone 1.2, and the wall of the high-temperature zone 1.2 and the wall of the cooling zone 1.3 are separated by a heat insulation layer 20.

[0063] When desorbing at high temperature of 200℃-500℃:

[0064] (1) Introduce gas from the gas inlet pipe 12. The gas is air, nitrogen, carbon dioxide or water vapor. The gas is introduced from the bottom of the high temperature zone 1.2. The preheating zone 1.1 and the high temperature zone 1.2 are opened. The temperature of the preheating zone 1.1 is controlled at 200±25°C. The preheating zone 1.1 is preheated through the heat exchange tube 18. The temperature of the high temperature zone 1.2 is controlled between 300 and 500°C.

[0065] (2) Close the airtight valves 11 at the feed port 4 and the discharge port 6, and first use the inert gas purge assembly 10 to purge the quantitative bin 8 and the discharge mechanism 9;

[0066] (3) Open the sealed valve 11 at the feed port 4 to feed until the high-level material level controller 2 gives a sensing signal to stop feeding, close the sealed valve 11 at the feed port 4, and perform desorption treatment. During desorption, the gas is used as a carrier gas to take away the desorbed organic gas and is discharged from the exhaust port 5. After a set time t, open the sealed valve at the discharge port 6 to start discharging. After the discharge reaches the low-level material level controller 3 and gives a sensing signal, close the sealed valve at the discharge port 6 to stop discharging;

[0067] (4) Repeat steps (2) and (3) continuously, discard the activated carbon that has not been completely preheated, desorbed and cooled, and collect the activated carbon that has been completely preheated, desorbed and cooled; when activated and regenerated at 800°C-1000°C:

[0068] (1) Gas is introduced from the gas inlet pipe 12, and the preheating zone 1.1 and the high temperature zone 1.2 are opened. The temperature of the preheating zone 1.1 is controlled at 200±25°C, and the temperature of the high temperature zone 1.2 is controlled between 800 and 1000°C; the high temperature zone 1.2 is heated by a heating furnace 13, which is a regenerative thermal oxidation furnace or a regenerative catalytic combustion furnace; a plurality of heat exchange fin groups 14 are provided on the outer wall of the vertical kiln body 1 located in the heating furnace 13; a plurality of heat exchange fins 15 are provided inside the vertical kiln body 1 located in the high temperature zone 1.2;

[0069] (2) Close the airtight valves 11 at the feed port 4 and the discharge port 6, and first use an inert gas purge assembly to purge the quantitative bin 8 and the discharge mechanism 9;

[0070] (3) Open the sealed valve 11 at the feed port 4 to feed until the high-level material level controller 2 gives a sensing signal to stop feeding, close the sealed valve 11 at the feed port 4, and perform activation treatment. During activation, the gas is used as an activating agent and takes away the gas and carbon ash generated by the activation reaction and is discharged from the exhaust port 5. After a set time t, open the sealed valve 11 at the discharge port 6 to start discharging. After the discharge reaches the low-level material level controller 3 and gives a sensing signal, close the sealed valve 11 at the discharge port 6 to stop discharging;

[0071] (4) Steps (2) and (3) are continuously repeated, the activated carbon that has not been completely preheated, activated and cooled is discarded, and the activated carbon that has been completely preheated, desorbed and cooled is collected;

[0072] Example 2: Figure 2 As shown, referring to Example 1, a compressed air inlet pipe 19 is further provided at the high temperature zone 1.2, and the compressed air in the compressed air inlet pipe 19 is introduced from the middle section of the high temperature zone 1.2. During activation regeneration, the compressed air is introduced into the high temperature zone 1.2 to cause an incomplete oxidation reaction, releasing a large amount of heat.

[0073] Example 3: Figure 3 As shown, referring to Example 2, the gas discharged from the exhaust port 5 is dedusted by the high-temperature dust collector 16 and then passed into the pressure gas tank 17. The inert gas purge component 10 purges the quantitative bin 8 and the discharging mechanism 9, and the purged gas is passed into the pressure gas tank 17. The balancing air volume gas is then passed into the pressure gas tank 17, and the pressure gas tank 17 supplies gas to the heating furnace 13.

[0074] Example 4: Figure 4As shown, referring to Example 2, the gas discharged from the exhaust port 5 is passed through the deoiler 21 and the high-temperature dust collector 16 for dust removal and then enters the pressure gas tank 17. The inert gas purge component 10 purges the quantitative bin 8 and the discharging mechanism 9, and the purged gas passes through the high-temperature dust collector 16 and then enters the pressure gas tank 17. The balancing air volume gas is then passed into the pressure gas tank 17. The pressure gas tank 17 supplies gas to the heating furnace 13. The high-temperature dust collector 16 is an explosion-proof dust collector.

[0075] The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A high temperature desorption and activation regeneration sequencing batch production process for activated carbon, characterized in that: It comprises a vertical kiln body, on which a high-level material level controller and a low-level material level controller are arranged, a feed port and an exhaust port are arranged on the top of the vertical kiln body, and a discharge port is arranged on the bottom, the feed port is connected to a quantitative bin through a material pipeline, and the discharge port is connected to a discharge mechanism through a discharge pipeline, inert gas purge components are arranged at the quantitative bin and the discharge mechanism, and closed valves are arranged at the feed port and the discharge port, the vertical kiln body is divided into an upper heating zone and a lower cooling zone, and a gas inlet pipe is arranged at the heating zone; When desorbing at high temperature of 200℃-500℃: (1) Introduce gas from the gas inlet pipe, turn on the heating zone, and control the temperature of the heating zone between 200 and 500°C; (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism; (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform desorption treatment. During desorption, the gas is used as a carrier gas to take away the desorbed organic gas and discharge it from the exhaust port. After the set time t, open the sealed valve at the discharge port to start discharging. After the discharge reaches the low-level material level controller and gives a sensing signal, close the sealed valve at the discharge port to stop discharging; (4) Steps (2) and (3) are repeated continuously, the activated carbon discharged previously that has not been completely heated and cooled is discarded, and the activated carbon that has been completely heated and cooled is collected.

2. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 1, characterized in that: The heating zone is divided into a preheating zone and a high temperature zone from top to bottom, and the gas inlet pipe is located in the high temperature zone; When desorbing at high temperature of 200℃-500℃: (1) Introduce gas from the gas inlet pipe, open the preheating zone and the high temperature zone, control the temperature of the preheating zone at 200±25℃, and control the temperature of the high temperature zone between 300 and 500℃; (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism; (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform desorption treatment. During desorption, the gas is used as a carrier gas to take away the desorbed organic gas and discharge it from the exhaust port. After the set time t, open the sealed valve at the discharge port to start discharging. After the discharge reaches the low-level material level controller and gives a sensing signal, close the sealed valve at the discharge port to stop discharging; (4) Steps (2) and (3) are continuously repeated, the activated carbon discharged from the front that has not undergone complete preheating, desorption and cooling is discarded, and the activated carbon that has undergone complete preheating, desorption and cooling is collected; 800-1000℃ activation regeneration: (1) Introduce gas from the gas inlet pipe, open the preheating zone and the high temperature zone, control the temperature of the preheating zone at 200±25℃, and control the temperature of the high temperature zone between 800 and 1000℃; (2) Close the airtight valves at the feed inlet and the discharge port, and first use the inert gas purge assembly to purge the quantitative bin and the discharge mechanism; (3) Open the sealed valve at the feed port to feed until the high-level material level controller gives a sensing signal to stop feeding, close the sealed valve at the feed port, and perform activation treatment. During activation, the gas is used as an activator and takes away the gas and carbon ash generated by the activation reaction and is discharged from the exhaust port. After a set time t, open the sealed valve at the discharge port to start discharging. After the low-level material level controller gives a sensing signal, close the sealed valve at the discharge port to stop discharging; (4) Steps (2) and (3) are continuously repeated, and the activated carbon discharged previously that has not undergone complete preheating, activation and cooling is discarded, while the activated carbon that has undergone complete preheating, desorption and cooling processes is collected.

3. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: During activation and regeneration, compressed air is introduced into the high temperature zone to cause an incomplete oxidation reaction.

4. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The high temperature zone is heated by a heating furnace, which is a regenerative thermal oxidation furnace or a regenerative catalytic combustion furnace.

5. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The outer wall of the vertical kiln body located in the heating furnace is provided with a plurality of heat exchange fin groups.

6. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The vertical kiln body is provided with a plurality of heat exchange fins inside the high temperature zone.

7. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The gas discharged from the exhaust port is dedusted by a high-temperature dust collector and then passed into a pressure gas tank. The inert gas purge component purges the quantitative bin and the discharging mechanism, and the purged gas is passed into the pressure gas tank. The balancing air volume gas is then passed into the pressure gas tank, and the pressure gas tank supplies gas to the heating furnace.

8. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The preheating zone is preheated by heat exchange tubes.

9. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The gas is air, nitrogen, carbon dioxide or water vapor; the gas is introduced from the bottom of the high temperature zone; a compressed air inlet pipe is also provided at the high temperature zone, and the compressed air in the compressed air inlet pipe is introduced from the middle section of the high temperature zone.

10. The high temperature desorption and activation regeneration sequencing batch production process of activated carbon according to claim 2, characterized in that: The connection points between the wall of the preheating zone and the wall of the high-temperature zone, and between the wall of the high-temperature zone and the wall of the cooling zone are separated by a heat insulation layer.

Images