CN110975848A - Method for regenerating activated carbon of vehicle-mounted activated carbon regeneration system - Google Patents
Method for regenerating activated carbon of vehicle-mounted activated carbon regeneration system Download PDFInfo
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- 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
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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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
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
Abstract
The invention relates to an active carbon regeneration method of a vehicle-mounted active carbon regeneration system in the technical field of active carbon regeneration, which respectively comprises the following steps: the regeneration process of the active carbon, the post-combustion process of the high-temperature flue gas, the cooling process and the dust removal and discharge process. According to the activated carbon regeneration method, the heating regeneration furnace of the activated carbon and the high-temperature flue gas harmless emission reduction treatment system are integrated on the experiment vehicle, so that harmless treatment and emission of flue gas generated in regeneration are realized while activated carbon regeneration and recovery are realized, and the applicability is strong.
Description
Technical Field
The invention relates to the technical field of activated carbon regeneration, in particular to a method for regenerating activated carbon of a vehicle-mounted activated carbon regeneration system.
Background
The activated carbon is porous carbon subjected to activation treatment, has strong adsorption capacity, and has been applied to the fields of military affairs, chemical engineering, environmental protection and the like for hundreds of years. The active carbon can be used in the first-level, second-level and third-level treatment processes in the treatment of industrial wastewater. For industrial wastewater with complex pollution components, several treatment processes are combined for treatment in most cases, and activated carbon is often applied to final advanced treatment in the combined process.
The coal granular carbon and the powdered carbon which can be used for water treatment have the same effect, but the granular carbon is not easy to lose and easy to regenerate and reuse, and is suitable for a water treatment process which has light pollution and runs continuously, while the powdered carbon is not easy to recover at present and is generally disposable, generally used as solid dangerous waste after being adsorbed and saturated, and has high cost. Therefore, some enterprises applying activated carbon are beginning to use granular carbon to replace powdered carbon, and recycling activated carbon through a regeneration device is used to reduce the cost.
The regeneration of the activated carbon means that the adsorption substances adsorbed in the micropores of the activated carbon are removed by a physical or chemical method on the premise of not destroying the original structure of the activated carbon, and the adsorption capacity of the activated carbon is recovered so as to be repeatedly used. At present, the following measures are mainly adopted in the aspect of activated carbon regeneration: thermal regeneration, chemical regeneration, biological regeneration, electrochemical regeneration, ultrasonic regeneration, and catalytic wet oxidation regeneration. These methods are characterized by each, and some are still in research stage, and are not really applied to engineering practice.
The heating regeneration has the advantages of high regeneration rate, short regeneration time and the like, so the mature activated carbon regeneration technology has practical application value and competitive advantage in the advanced treatment of wastewater.
Disclosure of Invention
The invention provides a method for regenerating active carbon of a vehicle-mounted active carbon regeneration system aiming at the regeneration requirement of granular active carbon in the prior art, so that the regeneration and the recycling of the granular active carbon are realized, and the field applicability is strong.
The vehicle-mounted active carbon regeneration system comprises a regeneration furnace, a rear combustion chamber, a quench tower, a bag-type dust remover and an induced draft fan, wherein the regeneration furnace, the rear combustion chamber, the quench tower, the bag-type dust remover and the induced draft fan are arranged in a movable carriage; the regenerative furnace is internally provided with a plurality of layers of hearths from top to bottom in sequence, each hearth is provided with a blanking channel, the center of each hearth penetrates through a hollow central shaft, the central shaft is provided with a rake for pushing materials from the center to the periphery or from the periphery to the center in a turnover way corresponding to the upper side of each hearth, the blanking channels on each adjacent hearth are alternately arranged along the central shaft and the periphery of the hearth, the bottom of the central shaft extends out of the bottom of the regenerative furnace and is connected with a speed reducer, the upper side of each layer of hearths is provided with a burner, the inlet end of each burner is provided with a gas supply branch and an air supply branch respectively, the air supply branch is connected with a fan, the gas supply branch is used for connecting a gas pipeline on the treatment site, the top of the regenerative furnace is provided with a gas discharge port, the gas discharge port is connected with a post combustion chamber through a smoke discharge pipeline and is used for fully burning the smoke discharged from the, and then the waste gas is subjected to dust removal treatment by a bag-type dust remover and then is discharged or enters a deep tail gas treatment system, and the induced draught fan is used for negative pressure suction of the regeneration furnace and the bag-type dust remover.
In order to facilitate heating and regeneration of the activated carbon, the activated carbon regeneration furnace is respectively provided with a drying section, a baking section and an activation section from top to bottom, each section is provided with at least one layer of furnace beds, burners and a temperature control system are respectively arranged between the furnace beds, a fuel supply pipeline and an air supply pipeline which are connected with each burner are respectively connected with a fuel control valve and an air control valve, and a plurality of steam nozzles are uniformly distributed above the furnace beds of the activation section in the circumferential direction.
In order to facilitate the cooling of the central shaft, a cooling channel is arranged in the hollow cavity of the central shaft, a cooling air inlet is arranged at the bottom of the central shaft, and a cooling air outlet is arranged at the top of the central shaft and is connected with a branch pipeline of the induced draught fan.
In order to facilitate the sufficient combustion of all components in the post combustion chamber and realize the harmless treatment of high-temperature flue gas, the inlet end of the post combustion chamber is connected with a combustion-supporting device, the rear side of the combustion-supporting device is provided with a flue gas buffer cavity, and the capacity of the flue gas buffer cavity is 2-5 times of the maximum smoke discharge per second designed for the regeneration furnace.
In order to facilitate the sufficient cooling of the flue gas, an atomizing spray gun is arranged in the quenching tower and used for cooling the flue gas discharged by the post-combustion chamber.
In order to further realize the aim of regenerating and recycling the activated carbon, the method for regenerating the activated carbon by adopting the vehicle-mounted activated carbon regeneration system comprises the following steps: respectively comprises the following processes: the method comprises the following steps of (1) an active carbon regeneration process, a high-temperature flue gas post-combustion process, a cooling process and a dust removal and discharge process; the activated carbon regeneration process comprises the following steps:
step 1: respectively connecting the water, electricity and gas circuits of the vehicle-mounted activated carbon regeneration system to water, electricity and gas supply branches of each site; preheating is started, and each section of the regenerating furnace is heated to 650 ℃ at the speed of 25-30 ℃/hour;
step 2: adding saturated activated carbon to a feed inlet of a regeneration furnace according to a rated flow, and starting a speed reducer to drive a central shaft at a rotating speed of 0.5-3 rpm so as to drive a rake; simultaneously, starting an induced draught fan to maintain the micro negative pressure of-100 to-200 pa in the regeneration furnace so as to ensure that the oxygen content in the regeneration furnace is kept at a lower level and prevent the activated carbon from absorbing oxygen, and simultaneously, the environment of the micro negative pressure is convenient for the high-temperature flue gas generated in the furnace to be discharged from a discharge port at the top of the furnace in time;
and step 3: adjusting the air inlet flow of each burner to ensure that the temperature of each section in the regenerating furnace is as follows: the temperature of the drying section is 300-400 ℃, so that the moisture contained in the activated carbon can be fully evaporated; the temperature of the drying section is 500-600 ℃, organic adsorbates in the activated carbon pores can be further evaporated or carbonized, the temperature of the activation section is 850-1000 ℃, and the steam sprayed in the activation section is combined to completely remove the organic components remained in the activated carbon so as to recover the adsorption performance of the activated carbon;
and 4, step 4: starting a steam nozzle of the activation section, and feeding materials to the feed inlet according to a weight ratio of 1: 0.8-1.2 spraying steam; the activated carbon contains a certain amount of residual carbon in pores, and generates C + H with introduced water vapor in the activation process2O→CO+H2Is eliminated and product H is obtained2Further burning to release heat and provide heating energy for the inner part of the furnace;
and 5: sampling the activated carbon discharged from the first batch of the bottom of the regenerating furnace after passing through the cooling tank to detect the iodine value, judging whether the iodine value of the regenerated activated carbon is recovered to more than 80%, storing the regenerated activated carbon which meets the requirement in the carbon storage tank for temporary storage, returning the discharged material of the cooling tank to the feed end of the regenerating furnace if the iodine value of the activated carbon does not meet the requirement, simultaneously reducing the feed quantity of the saturated activated carbon at the inlet end and/or reducing the rotating speed of the central shaft, and repeating the processes from the step 1 to the step 5 until the iodine value of the discharged activated carbon meets the standard requirement. Through the cyclic detection and debugging process, the performance of the regenerated active carbon can be ensured, and the regeneration process meeting the field requirement can be debugged.
According to the activated carbon regeneration method, the heating regeneration of the activated carbon and the emission reduction treatment system for harmlessness of high-temperature flue gas are integrated on the test vehicle, so that the harmlessness treatment and emission of the flue gas generated in the regeneration are realized while the regeneration and recovery of the activated carbon are realized, the applicability is strong, the activated carbon regeneration method can be used in a field connection mode after being assembled and connected in advance according to the use requirements of customers, and the flexibility of the use field is strong; the vehicle-mounted activated carbon regeneration system is highly integrated, the requirement on the space of equipment on a use site is low, the internal pipeline does not need to be disassembled, and the vehicle-mounted activated carbon regeneration system can start to operate after being sent to a customer site and connected with necessary water, electricity and fuel pipelines, so that a large amount of construction and installation cost and precious time are saved for the customer; for customers using less total amount of active carbon, the active carbon regeneration method of the vehicle-mounted regeneration furnace system can be directly transported to the site for connection and use, so that the equipment investment is saved, the waste saturated carbon can be regenerated and reused on site, the effect of recycling is achieved, multiple purposes are achieved, and the method is convenient and rapid; for customers who have potential intention to invest in large-scale activated carbon regeneration devices, the development of the activated carbon regeneration method of the vehicle-mounted regeneration furnace system can realize feasibility tests on line, know the regeneration effect of the activated carbon on the spot and acquire related reference data, provide feasibility basis for investment decision items of the large-scale regeneration system and reduce the risk of item investment.
In order to ensure that the regenerated activated carbon meets the performance requirements after regeneration, the initial value of the rotating speed of the central shaft driven by the speed reducer in the step 2 is 3rpm, whether the rotating speed of the central shaft is reduced and the feeding amount is reduced is determined according to the iodine value detection result of the regenerated activated carbon in the step 5, if the iodine value of the regenerated activated carbon detected from the discharge end of the cooling tank in the step 5 is unqualified, the rotating speed of the central shaft is reduced by 0.5rpm, the feeding amount is reduced by one fifth, the processes in the steps 1-5 are carried out again until the iodine value of the regenerated activated carbon is qualified, and continuous activated carbon regeneration is carried out according to the qualified technological process.
In order to fully burn the harmful components of the high-temperature smoke, the high-temperature smoke is combusted from the middle regeneration fire grate to the post combustion chamber, the air input of the combustion-supporting device is adjusted, so that the combustible in the high-temperature smoke is fully combusted, and the detection temperature in the buffer chamber is ensured to be 750-850 ℃.
Further, the gas injection quantity of the atomizing spray gun in the quenching tower is adjusted, so that the temperature of the gas discharged from the discharge port of the quenching tower is lower than 200 ℃.
Drawings
Fig. 1 is a schematic diagram of an on-board activated carbon regeneration system of the present invention.
Fig. 2 is a plan view of an in-vehicle installation of the on-vehicle activated carbon regeneration system of the present invention.
Wherein, 1, a regeneration furnace; 101 a feed inlet; 102 a discharge hole; 103 a central axis; 104 a burner; 105 air supply branch; 106 gas supply branch; 107 flue gas discharge ports; 2 a post combustion chamber; 3 a quench tower; 4, a bag-type dust collector; 5 inducing a fan; 6 air supply fan.
Detailed Description
Example 1
As shown in fig. 1 and 2, the vehicle-mounted activated carbon regeneration system of the present invention comprises a regeneration furnace 1, a post combustion chamber 2, a quench tower 3, a bag-type dust collector 4 and an induced draft fan 5 which are installed in a mobile compartment, wherein the top of the regeneration furnace is provided with a feed inlet 101, the bottom of the regeneration furnace is provided with a discharge outlet 102, and a cooling tank and a carbon storage tank are sequentially connected below the discharge outlet 102; a plurality of layers of hearths are distributed in the regeneration furnace 1 from top to bottom in sequence, each hearth is respectively provided with a blanking channel, the center of each hearth penetrates through a hollow central shaft 103, the upper side of each hearth corresponding to the central shaft 103 is provided with a rake for pushing materials from the center to the periphery or from the periphery to the center in an overturning way, when the rake rotates along with the central shaft 103, the materials on the hearths can be turned over, the blanking channels on each adjacent hearth are alternately arranged along the central shaft 103 and the peripheral side of the hearth, the bottom of the central shaft 103 extends out of the bottom side of the regeneration furnace and is connected with a speed reducer, the upper side of each layer of hearth is provided with a burner 104, the inlet end of each burner 104 is respectively provided with a gas supply branch 106 and an air supply branch 106, the air supply branch 106 is connected with a fan 6, the gas supply branch 106 is used for connecting with a gas pipeline on a treatment site, the top of the regeneration furnace is provided with a smoke discharge port 107, the, high-temperature flue gas discharged after combustion in the post-combustion chamber 2 is cooled by a quench tower 3, then is subjected to dust removal treatment by a bag-type dust remover 4, and is discharged or enters an advanced tail gas treatment system, and an induced draft fan 5 is used for negative pressure suction of the regenerative furnace 1 and the bag-type dust remover 4. In addition, necessary monitoring instrument and control valve parts are arranged on the inlet and/or the outlet of each connecting pipeline, and a measuring probe and a display panel are arranged above each hearth in the regeneration furnace.
In order to facilitate the heating regeneration of the activated carbon, the regeneration furnace 1 of this embodiment is provided with a drying section, a baking section and an activation section from top to bottom, each section is provided with at least one hearth, burners 104 and a temperature control system for controlling the temperature of each hearth are respectively arranged between the hearths, a gas supply pipeline 106 and an air supply pipeline 105 connected with each burner 104 are respectively connected with a gas control valve and an air control valve for controlling the gas and air supply amount according to the temperature of each hearth, a plurality of steam nozzles are circumferentially distributed above the hearths of the activation section and connected with a field steam pipeline for providing steam for activated carbon, and a steam control valve is arranged on the steam pipeline for controlling the steam flow according to the treatment amount of the activated carbon.
In order to facilitate the cooling of the central shaft 103, a cooling channel is arranged in the hollow cavity of the central shaft 103, a cooling air inlet is arranged at the bottom of the central shaft 103, the cooling air inlet is connected with an air supply branch 105, and a cooling air outlet is arranged at the top of the central shaft and is connected with a branch pipeline of the induced draft fan.
In order to facilitate the sufficient combustion of each harmful component in the post combustion chamber and realize the harmless treatment of the high-temperature flue gas, the inlet end of the post combustion chamber 2 is connected with a combustion-supporting device 201, the rear side of the combustion-supporting device 201 is provided with a flue gas buffer cavity, the capacity of the flue gas buffer cavity is 2-5 times of the maximum smoke discharge per second of the design of the regenerative furnace, so as to ensure that the high-temperature flue gas stays in the post combustion chamber for more than 2 seconds and realize the sufficient mixing and combustion of the gas; in addition, in order to fully cool the flue gas, an atomizing spray gun is arranged in the quenching tower 3 and used for cooling the flue gas discharged by the post-combustion chamber.
According to the vehicle-mounted activated carbon regeneration system, the heating regeneration furnace of activated carbon and the harmless emission reduction treatment system of the regenerated high-temperature flue gas are integrated on the test vehicle, so that the flue gas generated in regeneration is subjected to harmless treatment and emission while the activated carbon is regenerated and recovered, the applicability is strong, the test vehicle can be driven to the field for connection after being assembled and connected in advance according to the use requirements of customers, and the flexibility of the use field is strong; the vehicle-mounted activated carbon regeneration system is highly integrated, the requirement on the space of equipment on a use site is low, the internal pipeline does not need to be disassembled, and the vehicle-mounted activated carbon regeneration system can start to operate after being sent to a customer site and connected with necessary water, electricity and fuel pipelines, so that a large amount of construction and installation cost and precious time are saved for the customer; for customers using less total amount of active carbon, the vehicle-mounted regeneration furnace system can be directly transported to the site for connection, so that the equipment investment is saved, the in-situ regeneration decrement of the waste saturated carbon can be realized, the effect of recycling is achieved, and the vehicle-mounted regeneration furnace system has multiple purposes and is convenient and rapid; for customers who have potential intention to invest in large-scale activated carbon adsorption regeneration devices, the vehicle-mounted regeneration furnace system can be used for realizing feasibility tests on line, the regeneration effect of activated carbon can be known on the spot, relevant reference data can be obtained, and project feasibility is decided according to actual results so as to reduce the risk of project investment.
Example 2
The embodiment is a method for regenerating activated carbon by using the vehicle-mounted activated carbon regeneration system of embodiment 1, and the method specifically comprises the following steps: the regeneration process of the active carbon, the post-combustion process of the high-temperature flue gas, the cooling process and the dust removal and discharge process.
Firstly, the activated carbon regeneration process comprises the following specific steps:
step 1: respectively connecting water, electricity and gas circuits of a vehicle-mounted activated carbon regeneration system to water, electricity and gas supply branches of each site, starting preheating after the instruments and meters display normal conditions after starting, and heating each section of the regeneration furnace to 650 ℃ at the speed of 25-30 ℃/hour;
step 2: lifting and feeding materials through a lifting mechanism on site, adding saturated activated carbon to a feed inlet of a regeneration furnace according to rated flow, feeding materials at the maximum rated flow when starting, and starting a speed reducer to drive a central shaft at a rotating speed of 3rpm so as to drive a rake; simultaneously starting an induced draught fan to maintain the micro negative pressure of-100 to-200 pa in the regeneration furnace so as to ensure that the oxygen content in the regeneration furnace is kept at a lower level and prevent the activated carbon from absorbing oxygen, and simultaneously, the environment of the micro negative pressure is convenient for the high-temperature smoke generated in the furnace to be discharged from a discharge port at the top of the furnace in time;
and step 3: the inlet gas flow rates of the burners 104 are adjusted so that the temperatures in the various sections of the regenerator are: the temperature of the drying section is 300-400 ℃, so that the moisture contained in the activated carbon can be fully evaporated; the temperature of the drying section is 500-600 ℃, organic adsorbates in the activated carbon pores can be further evaporated or carbonized, the temperature of the activation section is 850-1000 ℃, and the steam sprayed in the activation section is combined to completely remove the organic components remained in the activated carbon so as to recover the adsorption performance of the activated carbon;
and 4, step 4: after the material reaches the activation section, a steam nozzle of the activation section is opened, and the weight ratio of the material fed into the feed inlet to the steam is 1: 0.8-1.2 spraying steam; because the active carbon contains a certain amount of residual carbon in pores, the active carbon and the introduced water vapor generate C + H in the activation process2O→CO+H2The reaction is purged and product H2Further burning to release heat and provide heating energy for the inner part of the furnace;
and 5: when the first batch of regenerated activated carbon is discharged from the bottom of the regeneration furnace after starting up, sampling is carried out after passing through a cooling tank for iodine value detection, whether the iodine value of the regenerated activated carbon is recovered to be more than 80% is judged, and the regenerated activated carbon which meets the requirements is temporarily stored in a carbon storage tank or is packed by a field packing device; and if the iodine value of the activated carbon does not meet the requirement, returning the discharged material of the cooling tank to the feed end of the regenerating furnace, simultaneously reducing the feed amount of saturated activated carbon at the inlet end and/or simultaneously regulating the rotating speed of the central shaft to be reduced by 0.5rpm every time the rotating speed is reduced, reducing the feed amount by one fifth every time the rotating speed is reduced every time the rotating speed is repeated, and repeating the processes from the step 1 to the step 5 until the iodine value of the discharged activated carbon meets the standard requirement. Through the cyclic detection and debugging process, the performance of the regenerated active carbon can be ensured to meet the regeneration requirement, and the regeneration process meeting the field requirement can be debugged.
In the high-temperature flue gas post-combustion process, the high-temperature flue gas discharged from the top of the regeneration furnace to a post-combustion chamber is adjusted according to the smoke discharge amount of a flue gas outlet, the gas input of a combustion-supporting device is adjusted according to the volume ratio of the flue gas amount, the gas amount and the air amount of 1:1, so that the combustible substances in the high-temperature flue gas are fully combusted, the temperature in a buffer chamber is ensured to be 750-850 ℃ higher, and the full contact combustion of various organic substances and combustible substances in the high-temperature flue gas is realized; cooling the post-combustion emissions through a quench tower, and adjusting the gas injection quantity of an atomizing spray gun to ensure that the temperature of the gas discharged from the exhaust port of the quench tower is lower than 200 ℃; the cooled emissions are subjected to dust removal and emission reduction treatment by a cloth bag filter, and can be further connected with an advanced tail gas treatment system additionally arranged on the site for deeper harmless treatment.
The activated carbon regeneration method of the embodiment has the following processing advantages when used in the field,
1) the fuel consumption is low, the regeneration of the multi-stage furnace consumes 150Nm3/T carbon (measured by natural gas);
2) the maximum amount of saturated dry carbon treated by the small-sized regenerating furnace per day can reach 1 ton, and the small-sized regenerating furnace can be directly put into use on site; can also be used as the test equipment of the large-scale activated carbon retreatment system in the early stage;
3) the loss rate of the active carbon in the regeneration process is not more than 8 percent;
4) the recovery rate of the iodine value of the regenerated carbon can reach 80 percent.
Claims (5)
1. A method for regenerating activated carbon of a vehicle-mounted activated carbon regeneration system comprises the following steps: respectively comprises the following processes: the method comprises the following steps of (1) an active carbon regeneration process, a high-temperature flue gas post-combustion process, a cooling process and a dust removal and discharge process; the regeneration system of the on-vehicle activated carbon comprises: the activated carbon regeneration furnace, the post combustion chamber, the quench tower, the bag-type dust collector and the induced draft fan are arranged in the movable carriage, a feed port is formed in the top of the regeneration furnace, a discharge port is formed in the bottom of the regeneration furnace, and a cooling tank and a carbon storage tank are sequentially connected below the discharge port; the regenerative furnace is internally provided with a plurality of layers of hearths from top to bottom in sequence, each hearth is provided with a blanking channel, the center of each hearth penetrates through a hollow central shaft, the central shaft is provided with a rake for pushing materials from the center to the periphery or from the periphery to the center in a turnover way corresponding to the upper side of each hearth, the blanking channels on each adjacent hearth are alternately arranged along the central shaft and the periphery of the hearth, the bottom of the central shaft extends out of the bottom side of the regenerative furnace and is connected with a speed reducer, the upper side of each layer of hearths is provided with a burner, the inlet end of each burner is provided with a gas supply branch and an air supply branch respectively, the air supply branch is connected with a fan, the gas supply branch is used for connecting a gas pipeline on the site treatment, the top of the regenerative furnace is provided with a gas discharge port, the gas discharge port is connected with a post combustion chamber through a smoke discharge pipeline and is used for fully burning the smoke discharged from, and then the waste gas is subjected to dust removal treatment by a bag-type dust remover and then is discharged or enters a deep tail gas treatment system, and the induced draught fan is used for negative pressure suction of the regeneration furnace and the bag-type dust remover.
2. The method of activated carbon regeneration of an on-board activated carbon regeneration system according to claim 1, wherein the activated carbon regeneration process comprises the steps of:
step 1: respectively connecting the water, electricity and gas circuits of the vehicle-mounted activated carbon regeneration system to water, electricity and gas supply branches of each site; preheating is started, and each section of the regenerating furnace is heated to 650 ℃ at the speed of 25-30 ℃/hour;
step 2: adding saturated activated carbon to a feed inlet of a regeneration furnace according to a rated flow, and starting a speed reducer to drive a central shaft at a rotating speed of 0.5-3 rpm so as to drive a rake; simultaneously starting an induced draught fan to maintain the micro negative pressure of-100 to-200 pa in the regeneration furnace;
and step 3: adjusting the air inlet flow of each burner to ensure that the temperature of each section in the regenerating furnace is as follows: the temperature of the drying section is 300-400 ℃, the temperature of the baking section is 500-600 ℃, and the temperature of the activation section is 850-; the regeneration furnace is provided with a drying section, a baking section and an activation section from top to bottom, each section is provided with at least one layer of hearth, burners and a temperature control system are arranged among the hearths, a fuel supply pipeline and an air supply pipeline connected with the burners are connected with a fuel control valve and an air control valve respectively, and a plurality of steam nozzles are uniformly distributed above the hearths of the activation section in the circumferential direction;
and 4, step 4: starting a steam nozzle of the activation section, and feeding materials to the feed inlet according to a weight ratio of 1: 0.8-1.2 spraying steam;
and 5: sampling the activated carbon discharged from the first batch of the bottom of the regenerating furnace after passing through the cooling tank to detect the iodine value, judging whether the iodine value of the regenerated activated carbon is recovered to more than 80%, storing the regenerated activated carbon which meets the requirement in the carbon storage tank for temporary storage, returning the discharged material of the cooling tank to the feed end of the regenerating furnace if the iodine value of the activated carbon does not meet the requirement, simultaneously reducing the feed quantity of the saturated activated carbon at the inlet end and/or simultaneously reducing the rotating speed of the central shaft, and repeating the processes from the step 1 to the step 5 until the iodine value of the discharged activated carbon meets the standard requirement.
3. The method for regenerating activated carbon according to claim 2, wherein the initial value of the rotation speed of the central shaft driven by the speed reducer in the step 2 is 3rpm, whether the rotation speed of the central shaft is reduced and the feeding amount is reduced is determined according to the detection result of the iodine value of the regenerated activated carbon in the step 5, if the iodine value of the regenerated activated carbon detected from the discharge end of the cooling tank in the step 5 is unqualified, the rotation speed of the central shaft is reduced by 0.5rpm, the reduction amount of the feeding amount per cycle is not more than one fifth, the processes of the steps 1 to 5 are carried out again until the iodine value of the regenerated activated carbon is qualified, and the continuous activated carbon regeneration is continued according to the qualified process.
4. The method for regenerating the activated carbon according to claim 1, wherein an inlet end of the rear combustion chamber is connected with a combustion-supporting device, a flue gas buffer cavity is arranged at the rear side of the combustion-supporting device, and the capacity of the flue gas buffer cavity is 2-5 times of the maximum smoke discharge per second of the design of the regenerating furnace; in the high-temperature flue gas after-combustion process, the regeneration fire grate is arranged to the after-combustion chamber, the air input of the combustion-supporting device is adjusted, and a part of air is supplemented, so that the combustible in the high-temperature flue gas is fully combusted, and the detection temperature in the buffer chamber is ensured to be 750-850 ℃.
5. The method for regenerating activated carbon according to claim 6, wherein an atomizing spray gun is arranged in the quenching tower for cooling the flue gas discharged from the post-combustion chamber, and the amount of the atomizing spray gun in the quenching tower is adjusted during the cooling process, so that the temperature of the gas discharged from the outlet of the quenching tower is lower than 200 ℃.
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Cited By (2)
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| CN112791718A (en) * | 2021-04-14 | 2021-05-14 | 山东泰亚环保科技有限公司 | Movable vehicle-mounted activated carbon regeneration device |
| CN113813940A (en) * | 2021-09-29 | 2021-12-21 | 江苏科仕达实验室环保科技有限公司 | Saturated activated carbon activation regeneration treatment process and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112791718A (en) * | 2021-04-14 | 2021-05-14 | 山东泰亚环保科技有限公司 | Movable vehicle-mounted activated carbon regeneration device |
| CN113813940A (en) * | 2021-09-29 | 2021-12-21 | 江苏科仕达实验室环保科技有限公司 | Saturated activated carbon activation regeneration treatment process and control method |
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