WO2018068616A1 - Four d'activation de charbon actif et procédé de production de charbon actif - Google Patents

Four d'activation de charbon actif et procédé de production de charbon actif Download PDF

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Publication number
WO2018068616A1
WO2018068616A1 PCT/CN2017/102562 CN2017102562W WO2018068616A1 WO 2018068616 A1 WO2018068616 A1 WO 2018068616A1 CN 2017102562 W CN2017102562 W CN 2017102562W WO 2018068616 A1 WO2018068616 A1 WO 2018068616A1
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Prior art keywords
passage
furnace body
combustion passage
combustion
activated carbon
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PCT/CN2017/102562
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English (en)
Chinese (zh)
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张西进
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张西进
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Publication of WO2018068616A1 publication Critical patent/WO2018068616A1/fr
Priority to PH12019500765A priority Critical patent/PH12019500765A1/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/39—Apparatus for the preparation thereof

Definitions

  • the invention relates to the field of activated carbon production equipment and activated carbon production process, and more particularly to an activated carbon activation furnace and a method for producing activated carbon.
  • the physical method is to first prepare the activated carbon by placing the raw materials (high-quality coal, nut shell, charcoal, etc.) in a closed furnace body, smoldering and carbonizing, and then introducing an appropriate amount of steam to activate.
  • the raw material generally sawdust
  • a chemical agent phosphoric acid, zinc chloride, etc.
  • the production of activated carbon equipment by physical methods in China is generally a traditional vertical activation furnace, an external heat type converter, a liner rotary furnace, an internal heat positive pressure rotary furnace, and an internal heat direct combustion type activation furnace.
  • a heating furnace for an activated carbon production facility the application relates to a heating furnace for an activated carbon production facility, including a heating furnace body, a heating furnace The body comprises a casing, a furnace body axially disposed inside the casing, and an insulation layer disposed between the casing and the outer furnace body, the furnace body comprising an outer furnace body and an inner furnace body, and between the outer furnace body and the inner furnace body
  • the utility model comprises a closed cavity, wherein the cavity is provided with a plurality of heating components, one end of the inner furnace body is a feeding port, and the other end is a discharging port, and the heating furnace body is provided with
  • the setting of the heat insulation layer effectively reduces the heat loss of the heating furnace; the heating material is used to heat the raw material of the activated carbon in the inner furnace body, thereby avoiding problems such as excessive weight of the internal heat type heating furnace and excessive power consumption; and the heating assembly adopts several groups. Several heating components can achieve different temperature control of the heating temperature of the raw materials in the inner furnace body according to actual processing requirements.
  • the production capacity and quality of activated carbon are low: because the furnace body can not be sealed well, the combustible gas which is heated by the material is easy to be directly burned in the area where the material is placed, resulting in a large increase in the amount of carbonized material or activated carbon ablation.
  • the production capacity and quality of activated carbon increase the consumption of raw materials and energy consumption.
  • the existing activation furnace has a limited amount of feed per unit time, and the activated carbon production capacity cannot be further significantly improved, and the added raw materials are always accumulated in the lower part of the activation furnace due to gravity. It is difficult to fully contact with steam, resulting in poor activation and reducing the quality of activated carbon.
  • the invention provides an activated carbon activation furnace and a method for producing activated carbon.
  • the activated carbon activation furnace and the activated carbon production method of the invention can improve the safety of the activated carbon production process to a certain extent and improve the quality of the activated carbon produced.
  • the activated carbon activation furnace of the present invention comprises a furnace body, a material inlet device and a discharge mechanism, wherein the material inlet device is in communication with a feed port of the furnace body, and the discharge mechanism and the discharge of the furnace body
  • the mouth is connected, and the furnace body is provided with a combustion passage communicating with the inside of the furnace body.
  • the combustion passage is filled with air, the inside of the furnace body is in a negative pressure state and the air pressure in the combustion passage is lower than the inside of the furnace body.
  • the combustion passage is arranged along the length direction of the furnace body, the first end of the combustion passage is close to the feed inlet of the furnace body and communicates with the heat exchange mechanism through the pipeline, and the tail of the combustion passage The end is close to the discharge opening of the furnace body and its opening is provided.
  • the furnace body is internally separated by at least two material passages, the material passages are arranged along the length direction of the furnace body, and steam is passed through each material passage.
  • the furnace body comprises an outer cylinder body, and at least two sections of the sub-pillar support members are circumferentially arranged along the inner wall of the outer cylinder and enclose a combustion passage, and the adjacent two sections of the sub-tank support members A material passage is formed between the inner wall of the outer cylinder and the outer wall of the combustion passage.
  • each of the sub-storage support members includes a sub-storage support column and a sub-storage support plate, one end of the sub-storage support column is connected with the inner wall of the outer cylinder, and the sub-pillar support column is further One end is connected with the sub-storage support plate, the sub-storage support plate is a curved plate, and the sub-storage support plate disposed along the circumferential direction encloses a circular combustion passage with a radial cross-section at a central position inside the furnace body.
  • a section of the material passage is defined between two adjacent sub-station support columns, the inner wall of the outer cylinder and the outer wall of the combustion passage in the circumferential direction of the furnace body; a plurality of sub-tank support members are arranged along the length direction of the furnace body to form a sub-storage support Pieces.
  • a sub-female buckle is connected between two sub-station support members adjacent to each other in the circumferential direction of the furnace body and two sub-tank support members adjacent to each other along the longitudinal direction of the furnace body. Together, the joint gap between them is sealed with glue.
  • the end of the combustion passage is connected with a retaining ring, and the inner wall of the retaining ring is fixed to the outer wall of the combustion passage.
  • the first end of the combustion passage is sequentially connected to a steam generator, a dust remover and a chimney through a pipe, and the smoke inlet end or the smoke outlet end of the steam generator is provided with
  • the steam outlet of the steam generator is connected to the steam distribution mechanism through a pipeline
  • the steam distribution mechanism includes a plurality of steam nozzles, and at least one steam nozzle is connected in each material passage;
  • the mechanism includes a plurality of air tubes, the plurality of air tubes are distributed along the length of the combustion passage, and each of the air tubes is correspondingly communicated with the interior of the combustion passage through a branch support.
  • the material feeding device supplies material through a feeding mechanism
  • the discharging mechanism adopts a screw conveyor
  • the outer cylinder is driven to rotate by a transmission device thereon.
  • the first end of the combustion passage is provided with a rotary joint
  • two sides of the bottom of the outer cylinder are respectively provided with a support
  • the outer cylinder adjusts the relative heights of the two supports through the support adjusting device;
  • the inner wall of the outer cylinder is provided with an insulation layer and a refractory layer from the inside to the outside, and the refractory layer is made of a refractory castable;
  • the branch support is made of a composite material of silicon nitride and silicon carbide;
  • Each steam nozzle has a steam flow valve, and each air tube is provided with an air flow valve, and the furnace body is provided with a temperature measuring device at different positions along the length direction, the steam flow valve, the air flow Both the valve and the temperature measuring device are connected to a computer.
  • the activated carbon production method of the invention preheats the rotary activation furnace before the start of the production of the activated carbon, and the activated carbon production comprises the following steps:
  • Step A providing a combustion passage and at least two material passages in the activation furnace, the at least two material passages are disposed around the combustion passage, and the combustion passage and the material passage are connected to the inside of the activation furnace;
  • Step B respectively, the materials are sent into the material passages through the material inlet device, and steam is respectively introduced into the respective material passages, and the materials are discharged after being activated by the discharging mechanism;
  • Step C opening the induced draft fan in communication with the combustion passage, so that the inside of the activation furnace is in a negative pressure state and the air pressure in the combustion passage is lower than that in the activation furnace, so that the evolved gas in each material passage is introduced into the combustion passage after being heated, and is combusted.
  • the air passing through the passage is mixed and burned;
  • Step D heat generated by combustion in the combustion passage, heat radiation, heat conduction to materials in each material passage;
  • Step E passing the flue gas generated by the combustion in the combustion passage into the steam generator, and after the heat exchange, the generated steam is subsequently used, and the remaining flue gas is discharged after being dusted;
  • step B, step C, step D, and step E are repeated until the production of activated carbon is completed.
  • the furnace body is provided with a combustion passage communicating with the inside of the furnace body, and the gas pressure in the combustion passage is lower than the furnace The inside of the body, so that the combustible gas which is thermally precipitated inside the furnace body is directly sucked from the inside of the furnace body into the combustion passage, and is mixed and burned with the air passing through the combustion passage, and on the other hand, the physical production of activated carbon in the furnace body is provided.
  • the gas pressure in the combustion passage is lower than the inside of the furnace body, the gas source from which the material is heated is continuously sucked into the combustion passage or burned or discharged, and the gas flows in one direction from the inside of the furnace body to the combustion passage.
  • the air passing through the combustion passage cannot reach the inside of the furnace body, so the area where the material inside the furnace body is placed is in an oxygen-deficient state, and the combustible gas which is thermally precipitated from the material cannot be directly burned in the area where the material inside the furnace body is placed, thereby avoiding the carbonized material.
  • the activated carbon is ablated, which improves the productivity and quality of the activated carbon, reduces the consumption of raw materials and energy consumption; and since the gas pressure in the combustion passage is lower than the inside of the furnace body, there is no need to worry that the flue gas in the combustion passage breaks into the interior of the furnace body. Contaminant material.
  • the inside of the furnace body is set to a negative pressure state, even if a high-temperature gas detonation phenomenon occurs due to a sudden rise in the gas pressure inside the furnace body, the detonation flame is difficult to escape from the furnace due to the buffering action of the negative pressure state inside the furnace body.
  • the body seal is sprayed and burned, which greatly avoids the safety accident caused by the burning of the furnace body seal.
  • the inside of the furnace body is divided into at least two material passages, and since the material passages are divided into a plurality of materials, the materials fed from the feed inlet of the furnace body are evenly distributed in the respective material passages, each The thickness of the material layer in the material channel is moderate and reasonable, and the activation furnace adopts low-incline rotation.
  • Each material channel is repeatedly rotated up and down, the number of times of material turning in the furnace is increased, the material is turned more fully, and the frequency and time of steam contact with the material. The increase is greatly improved, the optimal activation effect is achieved, and the quality of the activated carbon is improved.
  • the amount of the feed per unit time is greatly increased compared with the past, and the amount of the activated carbon is significantly increased. The capacity of activated carbon.
  • At least two sections of the sub-storage support members are circumferentially disposed along the inner wall of the outer cylinder and enclose a combustion passage, and are supported by the sub-pillar support members to form a combustion passage, and the adjacent two-stage sub-chamber support members and the outer cylinder body
  • the wall and the outer wall of the combustion passage enclose a material passage, and the combustion passage and the material passage surrounded by the above structure are adopted, wherein the combustion passage is supported between the plurality of material passages, and the structural stability is good.
  • each of the sub-storage support members is arranged and composed of a plurality of sub-storage support members along the length direction of the furnace body.
  • the joint gap between the adjacent two sub-tank supports is sealed with glue, clay
  • the activation furnace is used for the first time, it is thermally solidified to provide a good sealing effect.
  • each steam nozzle has a steam flow valve
  • each air tube is provided with an air flow valve
  • the furnace body is provided with a temperature measuring device at different positions along the length direction, and the steam flow valve
  • the air flow valve and the temperature measuring device are all connected with the computer, and the computer intelligent control system is used.
  • the temperature data of each section of the furnace body is adopted.
  • the measurement and control of the body speed and other data realizes the intelligent control management of the whole process of production.
  • the combustion passage is placed at the center of the furnace body, and the material passage is evenly distributed around the combustion passage, which is favorable for uniform radiation heating of each material passage, stabilizes the heating temperature of the material, and improves the activation effect of the material;
  • the high-temperature flue gas after combustion in the channel passes through the steam generated by the steam generator to meet the steam demand in the production process.
  • the entire production process does not require an external heat source, which greatly reduces the energy consumption.
  • the material evolved gas and then passed through the combustion. After heat exchange, dust removal and purification, it solves the pollution problem caused by the evolved gas and meets the green environmental protection standard.
  • FIG. 1 is a schematic structural view of an activated carbon activation furnace of Embodiment 1;
  • Figure 2 is a cross-sectional view showing the structure of the furnace body of Figure 1 in the radial direction;
  • Embodiment 3 is a schematic structural view of a single sub-station support member in Embodiment 2;
  • FIG. 4 is a schematic right side view of the outer cylinder body in the third embodiment
  • Fig. 5 is a flow chart showing a method for producing activated carbon of Example 4.
  • the activated carbon activation furnace of the embodiment includes a furnace body, a material inlet device 13 and a discharge mechanism 15, and the material inlet device 13 communicates with the feed port of the furnace body, and the discharge mechanism 15 and the furnace
  • the discharge port of the body is connected, and the combustion chamber 6 is provided with a combustion passage 6 communicating with the inside of the furnace body.
  • the combustion passage 6 is filled with air, the inside of the furnace body is in a negative pressure state and the air pressure in the combustion passage 6 is lower than the inside of the furnace body.
  • the level and method of the process cannot completely seal the area between the furnace bodies. Therefore, the combustible gas which is thermally precipitated by the material is likely to be directly burned in the area where the material is placed, thereby causing a large increase in the amount of carbonized material or activated carbon ablation, and reducing the activated carbon.
  • the production capacity and quality increase the consumption of raw materials and energy consumption, but in the present embodiment, the above problems are completely avoided, as follows:
  • the furnace body is provided with a combustion passage 6 communicating with the interior of the furnace body (the four walls of the combustion passage 6 divide the combustion passage 6 and the area where the material inside the furnace body are placed into two relatively independent regions), and the combustion passage
  • the gas pressure in the gas is lower than the inside of the furnace body, so that the combustible gas which is thermally precipitated inside the furnace body is directly sucked from the inside of the furnace body into the combustion passage 6, and is mixed with the air passing through the combustion passage 6, and burned.
  • the utility model provides a heat source for the production of activated carbon by the physical method inside the furnace body, specifically, heat radiation and heat transfer generated by combustion in the combustion passage 6 to the material; on the other hand, since the gas pressure in the combustion passage 6 is lower than the inside of the furnace body, the material is thermally precipitated. The gas is continuously sucked into the combustion passage 6 or burned or discharged.
  • the gas flows unidirectionally from the inside of the furnace body to the combustion passage 6, so that the air passing through the combustion passage 6 cannot reach the inside of the furnace body, so the inside of the furnace body
  • the area where the material is placed is in anoxic state, and the combustible gas which is thermally precipitated from the material cannot be directly burned in the area where the material inside the furnace body is placed, avoiding carbonized material or active
  • the charcoal is ablated, which improves the productivity and quality of the activated carbon, reduces the consumption of raw materials and energy consumption; and since the gas pressure in the combustion passage 6 is lower than the inside of the furnace body, there is no need to worry that the flue gas in the combustion passage 6 breaks into the interior of the furnace body. And the pollutants.
  • the change in the amount of gas generated may cause instability of the gas pressure (that is, the carbonization material may be heated unevenly, etc., causing a change in the gas production in the furnace, thereby causing instability of the gas pressure), and the sudden rise of the gas pressure may cause
  • the high-temperature gas deflagration causes safety hazards such as the burning of the furnace body seal.
  • the sealing performance at the rotary joint is relatively poor.
  • the inside of the furnace body is set to a negative pressure state, so even if a high temperature gas detonation phenomenon occurs due to a sudden rise in pressure inside the furnace body, the buffer of the internal negative pressure state of the furnace body is buffered. The flame of the detonation is difficult to be ejected from the seal of the furnace body, which greatly avoids the safety accident caused by the burning of the seal of the furnace body.
  • the combustion passage 6 is disposed along the longitudinal direction of the furnace body, the first end of the combustion passage 6 is close to the feed inlet of the furnace body and communicates with the heat exchange mechanism through the pipeline, and the tail end of the combustion passage 6 is close to the furnace body.
  • the discharge port and its opening are set.
  • the combustion passage 6 is disposed along the longitudinal direction of the furnace body, so that the combustion passage 6 heats the material inside the furnace body along the length direction of the furnace body, thereby improving the heating effect of the material; the first end of the combustion passage 6 passes through the pipeline and The heat exchange mechanism is connected to heat recovery of the high-temperature flue gas after combustion in the combustion passage 6, thereby improving energy utilization efficiency; the first end of the combustion passage 6 extends to the feed port of the furnace body, and the tail end of the combustion passage 6 extends to the furnace The discharge opening of the body, and the opening end of the combustion passage 6 is arranged, so that the combustible gas which is thermally precipitated inside the furnace body is collected in the direction in which the material moves, and then passes into the tail end of the combustion passage 6, which is beneficial to the flammable gas more smoothly. It is burned into the combustion passage 6.
  • the orientation of the first end and the trailing end of the combustion passage 6 can be reversed, and the collection of the combustible gas in the combustion passage 6 can also be achieved; and the head end of the combustion passage 6 can also be
  • the tail ends are respectively connected to the heat exchange mechanism through the pipeline, and cut or dig holes at a certain portion in the middle of the combustion passage 6 to form an opening for extracting the combustible gas, and the collection of the combustible gas in the combustion passage 6 can also be realized.
  • combustion passage 6 communicates with the inside of the furnace body, and the flue gas after combustion inside the combustion passage 6 passes through the heat exchange mechanism to recover heat, if the person skilled in the art is inspired by it,
  • the structural form and the embodiment similar to the technical solution are not creatively designed, and are all within the scope of protection of the present invention.
  • the furnace body is separated by at least two material passages 5, and the material passages 5 are arranged along the length direction of the furnace body, and steam is passed through each of the material passages 5.
  • the existing activation furnace has a limited amount of feed per unit time, so the activated carbon production capacity cannot be further significantly improved, and the added raw materials are always accumulated in the lower part of the activation furnace due to gravity, and it is difficult to fully contact with the steam, resulting in poor activation effect and reduced activated carbon. quality.
  • the inside of the furnace body is divided into at least two material passages 5, and the material passages 5 are arranged along the length direction of the furnace body, and the materials fed from the feed inlet of the furnace body are evenly distributed in the respective material passages 5.
  • the production capacity and quality of activated carbon can be significantly improved. The specific reasons are as follows: There is only one large material passage in the existing activation furnace, and the materials are added according to the specified amount. Although the activation furnace can rotate, a large amount of materials always accumulate due to gravity. In the lower part of the activation furnace, a thicker material layer is formed in the lower part of the activation furnace.
  • the above problem can be improved to some extent, as follows: the interior of the furnace body is divided into at least two material passages 5, and the material passages 5 are divided into a plurality of materials, which are fed from the feed inlet of the furnace body.
  • each material passage 5 The materials are evenly distributed in each material passage 5, and the thickness of the material layer in each material passage 5 is moderate and reasonable, and the activation furnace is rotated at a low inclination, and each material passage 5 is repeatedly rotated up and down, and the number of times the material is turned in the furnace Increase, material turnover The movement is more sufficient, the number and time of contact between the steam and the material is greatly increased, the optimal activation effect is achieved, and the quality of the activated carbon is improved.
  • the feeding amount per unit time is greatly increased compared with the past (because the material channel 5 is divided into a plurality of parts, under the same total feeding amount condition, The mixing of materials and steam is significantly improved, providing conditions for increasing the total amount of feed per unit time; although the feed amount of single material passage 5 is relatively small, the total amount of feed for all material passages 5 is relatively significantly increased), in theory
  • the interior of the furnace body is divided into The 8 material channels 5 have a total amount of feed per unit time of 2 to 3 times, which significantly increases the capacity of activated carbon.
  • the furnace body in the embodiment comprises an outer cylinder 1 which is rolled from a steel plate.
  • the inner wall of the outer cylinder 1 is provided with an insulation layer 2 and a refractory layer 3 from the inside to the outside, and the conventional activation furnace
  • refractory bricks are used as the refractory layer 3, and the refractory bricks will expand under high temperature conditions, and vibration will occur during the rotation of the activation furnace, which easily causes loosening of the refractory bricks and deformation of the furnace body.
  • the refractory layer 3 is made of refractory castable, so that the refractory layer 3 has excellent performances such as high temperature resistance and high strength, thereby improving the reliability and service life of the equipment.
  • the furnace body comprises an outer cylinder body 1, and at least two sections of the sub-chamber support member 4 are circumferentially arranged along the inner wall of the outer cylinder body 1 and enclose a combustion passage 6, two adjacent sections of the sub-chamber support member 4 and the outer cylinder body.
  • a material passage 5 is defined between the inner wall and the outer wall of the combustion passage 6. Referring to FIG. 2, in the present embodiment, the combustion passage 6 and the plurality of material passages 5 are surrounded by a plurality of sub-storage support members 4.
  • At least two sub-storage support members 4 are circumferentially disposed along the inner wall of the outer cylinder 1
  • the combustion passage 6 is supported by the sub-pillar support 4 to form a combustion passage 6, and the adjacent two-stage sub-station support 4, the inner wall of the outer cylinder 1 and the outer wall of the combustion passage 6 enclose a material passage 5, which is surrounded by the above structure.
  • the combustion passage 6 and the material passage 5 are formed, wherein the combustion passage 6 is supported between the plurality of material passages 5, and the structural stability is good.
  • the multi-segment sub-station support member 4 constituting the combustion passage 6 and the material passage 5 can be an integrated structure, which is integrally formed and molded at one time, and is convenient to manufacture.
  • the first end of the combustion passage 6 is connected to the steam generator 10, the dust remover 11 and the chimney 12 through a pipeline, and the air inlet end and or the smoke outlet end of the steam generator 10 are provided with an induced draft fan 9 (specifically, this embodiment)
  • An inlet fan 9 is disposed on the inlet end and the outlet end of the steam generator 10, and the induced draft fan 9 disposed at the inlet end of the steam generator 10 is mainly used to make the inside of the furnace body a negative pressure state and the combustion passage 6
  • the air pressure is lower than the inside of the furnace body, and the induced draft fan 9 disposed at the cigarette end of the steam generator 10 is mainly used for discharging the flue gas after the heat exchange, and the steam outlet of the steam generator 10 is connected to the steam distribution mechanism 7 through the pipeline.
  • the steam distribution mechanism 7 includes a plurality of steam nozzles, and at least one steam nozzle is introduced in each material passage 5; in this embodiment, after combustion in the combustion passage 6
  • the high-temperature flue gas passes through the steam generated by the steam generator 10 to meet the steam demand in the production process, and the entire production process does not require external heat energy, which greatly saves production cost and reduces energy consumption; and the high-temperature flue gas passes through the steam generation.
  • Heat, dust collector emissions purification 11 solve the problem of smoke pollution on the environment, to achieve the environmental protection standards.
  • the air distribution mechanism 8 includes a plurality of An air tube, a plurality of air tubes are distributed along the length of the combustion passage 6, and each air tube is correspondingly communicated with the interior of the combustion passage 6 through a sub-tank support member 4, thereby solving the seal caused by the air tube passing through the rear end of the combustion passage 6. , bending deformation, maintenance difficulties and other issues.
  • the supply of air at different positions in the combustion passage 6 can be controlled to adjust the intensity of the flame in the combustion passage 6, thereby adjusting the temperature distribution in the furnace to better meet the needs of the production process and improve product quality.
  • the material feeding device 13 supplies material through the feeding mechanism 14, the discharging mechanism 15 adopts a screw conveyor, and the outer cylinder 1 is driven to rotate through the transmission device 16 thereon.
  • the first end of the combustion passage 6 is provided with a rotary joint 18, and the outer cylinder
  • the two sides of the bottom of the body 1 are respectively provided with a support, and the relative heights of the two supports are adjusted by the support adjusting device 17.
  • the support near the inlet of the furnace body is higher than the feed away from the furnace body.
  • the support at the mouth and the relative height of the two supports are arranged such that the outer cylinder 1 is inclined as a whole, so that the material is gradually pushed into the discharge mechanism 15 in the outer cylinder 1 with the rotation of the outer cylinder 1.
  • Each steam nozzle has a steam flow valve, and each air tube is provided with an air flow valve, and the furnace body is provided with temperature measuring devices, steam flow valves, air flow valves and temperature measuring at different positions along the length direction.
  • the devices are all connected to a computer.
  • the computer intelligent control system is used to measure and control the temperature data of each section of the furnace body, the quantity of the in-furnace material, the steam flow rate, the air flow rate, and the rotational speed of the outer cylinder body 1 according to different types of materials produced by the activated carbon. The intelligent control management of the whole process of production has been realized.
  • the activated carbon activation furnace of the present embodiment has the same structure as that of Embodiment 1, and further:
  • each of the sub-station support members 4 includes a sub-storage support column 401 and a sub-storage support plate 402.
  • One end of the sub-storage support column 401 is connected to the inner wall of the outer cylinder body 1, and the other end of the sub-storage support column 401 is divided into points.
  • the warehouse support plates 402 are connected, the sub-storage support plates 402 are curved plates, and the sub-storage support plates 402 disposed along the circumferential direction enclose a circular combustion passage 6 in a radial horizontal direction at the inner center position of the furnace body, along the circumferential direction of the furnace body
  • a pair of adjacent sub-storage support columns 401, an inner wall of the outer cylinder 1 and an outer wall of the combustion passage 6 enclose a section of a material passage 5;
  • a plurality of sub-tank support members 4 are arranged along the length of the furnace body and form a section.
  • the warehouse support member 4 specifically, in the embodiment, the length of the combustion passage 6 is set to 12 to 20 meters, the inner diameter is set to 0.4 to 1.0 meters, and the height of the material passage 5 is set to 0.2 to 0.5 meters.
  • the combustion passage 6 is placed at the center of the furnace body, and the material passage 5 is evenly distributed around the combustion passage 6, which is favorable for uniform radiation heating of the material passages 5, stabilizes the heating temperature of the material, and improves the activation effect of the material;
  • the high-temperature flue gas after combustion in 6 is steamed by steam generator 10 to meet the steam demand in the production process.
  • the entire production process does not require an external heat source, which greatly reduces energy consumption.
  • the material evolved gas after combustion Through heat exchange, dust removal and purification, the problem of environmental pollution caused by the evolved gas is solved, and the green environmental protection standard is reached.
  • the inventor Since the metal material has good sealing performance without severe deformation, the inventor initially tends to use the metal material to make the combustion passage 6 or the material passage 5, but in the actual use of the activation furnace, the inside of the furnace body is 900. High temperature around the temperature, after a period of use, almost all metal materials (such as high temperature stainless steel) Both the material channel 5 and the combustion channel 6 have problems such as bending, deformation, cracking, gas leakage, and fracture, which are difficult to meet the needs of use. How to find a high-temperature resistant metal material suitable for the internal use of the activation furnace is a key research topic in the early stage of the inventor, but the inventors did not find a suitable high temperature resistant metal material after investing a lot of manpower and material resources.
  • the sub-storage support member 4 is made of a composite material of silicon nitride and silicon carbide, and has the properties of high temperature resistance, high strength, good toughness, good oxidation resistance and thermal conductivity, and greatly improves the reliability of the device. Service life.
  • each of the sub-storage support members 4 is arranged and arranged along the length direction of the furnace body by a plurality of sub-storage support members 4, and adopts such a modular (fragmented) structure form, and there are adjacent modules.
  • the better deformation buffer can prevent the assembled material passage 5 and the combustion passage 6 from being broken due to deformation, greatly improving the structural stability and reliability of the material passage 5 and the combustion passage 6, and greatly improving the reliability of the equipment. Sex and age.
  • the two sub-station support members 4 adjacent to the circumferential direction of the furnace body are connected by a female snap ring and the joint gap between them is sealed by a glue, and the adjacent two bins can be separated by the sub-female buckle.
  • the support members 4 are relatively fixed together, and even when a relatively severe thermal expansion and contraction occurs, the female snap fasteners can form a certain buffer to prevent the two adjacent split support members 4 from falling off due to stress deformation or
  • the connection gap between the adjacent two sub-station supports 4 is sealed by a glue, and the cement is thermally solidified when the activation furnace is used for the first time, which is a good seal. effect.
  • the structure and assembly method of the above-mentioned sub-female connection and the glue seal seem to be simple, it has been confirmed by the inventors on several occasions that the two cooperate with each other to improve the structural stability of the material passage 5 and the combustion passage 6. And ensure the corresponding sealing of the material passage 5 and the combustion passage 6.
  • the activated carbon activation furnace of the present embodiment is used for the physical production of activated carbon. Therefore, in the process of heat activation of the material in the material passage 5, it is necessary to ensure that the material passage 5 has a good regional sealing performance to avoid materials.
  • the heated precipitation gas directly in the material passage 5 generates a combustion reaction to ablate the carbonized material or the activated carbon, thereby affecting the productivity and quality of the activated carbon.
  • the material passage 5 prepared by using the sub-station support member 4 has good sealing performance, but the distance It is better to meet the requirements of the physical method for producing the activated carbon for the sealing performance of the material passage 5, and there is still room for further improvement.
  • the material passage 5 made by using the plurality of sub-pillar support members 4 in this embodiment must be In combination with the structure in the present embodiment that the inside of the furnace body is in a negative pressure state and the gas pressure in the combustion passage 6 is lower than the inside of the furnace body, because the two cooperate When used, the combustible gas which is heated by the material can be sucked into the combustion passage 6 from the inside of the furnace body, and the air is mixed in the combustion passage 6 to be burned to ensure that the material passage 5 is in an oxygen-deficient state.
  • the air and the flue gas in the combustion passage 6 cannot be mixed into the material passage 5, thereby directly satisfying the extremely high requirement of the physical method for producing the activated carbon for the sealing performance of the material passage 5, thereby ensuring the structural stability of the material passage 5 and the combustion passage 6. Sex, improve equipment life, reduce costs, and ensure the production capacity and quality of activated carbon.
  • the activated carbon activation furnace of the present embodiment has the same structure as that of Embodiment 2, and further:
  • the end of the combustion passage 6 is connected to a retaining ring 19, and the inner wall of the retaining ring 19 is fixed to the outer wall of the combustion passage 6.
  • the material passage 5 located at the upper end of the combustion passage 6 is easy to be used for the gas in the material passage 5 when it is sucked into the combustion passage 6 due to the accumulation of the material at the bottom thereof. It is brought into the combustion passage 6, and by the installation of the retaining ring 19, the material accumulated in the material passage 5 which is rotated to the upper end of the combustion passage 6 can be blocked from being directly dropped into the combustion passage 6.
  • the activated carbon activation furnace in the third embodiment is preheated before the start of activated carbon production, and the activated carbon production includes the following steps:
  • Step A a combustion passage 6 and at least two material passages 5 are disposed in the activation furnace, and the at least two material passages 5 are disposed around the combustion passage 6, and the combustion passage 6 and the material passage 5 are communicated with the activation furnace;
  • Step B The materials are respectively sent into the material passages 5 through the material feeding device 13, and steam is respectively introduced into the respective material passages 5. After the materials are activated, the materials are discharged through the discharging mechanism 15;
  • Step C opening the induced draft fan 9 communicating with the combustion passage 6 so that the inside of the activation furnace is in a negative pressure state and the air pressure in the combustion passage 6 is lower than that in the activation furnace, so that the evolved gas in each material passage 5 is introduced into the combustion passage 6 after being heated. Internally mixed with and combusted with air passing through the combustion passage 6;
  • Step D heat generated by combustion in the combustion passage 6 is thermally radiated and thermally conducted to materials in the respective material passages 5;
  • Step E the flue gas generated by the combustion in the combustion passage 6 is introduced into the steam generator 10, and after the heat exchange, the generated steam is subsequently used, and the remaining flue gas is discharged after being dusted;
  • step B, step C, step D, and step E are repeated until the production of activated carbon is completed.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

Un four d'activation de charbon actif et un procédé de production de charbon actif, qui se rapportent au domaine des dispositifs de production de charbon actif et des technologies de production de charbon actif. La sécurité d'un processus de production de charbon actif peut être améliorée dans une certaine mesure, le four d'activation peut fonctionner de façon stable pendant une longue période, et la qualité et la capacité productive du charbon actif produit peuvent être considérablement améliorées. Le four d'activation de charbon actif comprend un corps de four, un dispositif d'entrée de matériau (13), et un mécanisme de décharge de matériau (15). Un passage de combustion (6) communiquant avec l'intérieur du corps de four est disposé dans le corps de four. De l'air est introduit dans le passage de combustion (6). L'intérieur du corps de four est dans un état de pression négative, et la pression d'air dans le passage de combustion (6) est inférieure à celle dans le corps de four. Le procédé de production de charbon actif comprend les étapes suivantes : étape A, agencement d'un passage de combustion (6) et de passages de matériau (5); étape B, introduction de vapeur dans les passages de matériau (5); étape C, introduction du gaz dégagé dans les passages de matériau (5), dans le passage de combustion (6); étape D, chauffage de matériaux dans les passages de matériau (5); et étape E, introduction de gaz de combustion générés lors de la combustion dans un générateur de vapeur (10) pour l'échange de chaleur. Le four d'activation de charbon actif et le procédé de production de charbon actif sont principalement utilisés pour la production de charbon actif.
PCT/CN2017/102562 2016-10-14 2017-09-21 Four d'activation de charbon actif et procédé de production de charbon actif WO2018068616A1 (fr)

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CN113041714A (zh) * 2021-02-07 2021-06-29 大同新成欣荣新材料科技有限公司 一种用于人防空气净化过滤器的活性炭的生产设备

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