A preparation system for activated coke particles

Abstract

A preparation system for activated coke particles, comprising an automatic feeding device, a rotary kiln, a screening device and a packaging device which are connected in sequence, a temperature detection unit, a gas nozzle, an image acquisition unit and a control unit which are respectively connected to the outside of the rotary kiln; the material input volume in the image acquired by the image acquisition unit is less than one-half of the input volume, the temperature of the material and the inner wall of the rotary kiln is between 800 °C and 850 °C, and the control unit determines that the material enters the activation stage. When the temperature of the temperature detection unit is lower than 800 °C, the area near the temperature detection unit is a low-temperature area, and the control unit controls the gas nozzle near the temperature detection unit in the low-temperature area to introduce air in real time, and heat is generated by the exothermic reaction of oxygen and carbon monoxide in the air to compensate for the temperature of the low-temperature area with the heat generated by the exothermic reaction. The present invention adopts the method of air compensation to perform air compensation on the low-temperature area, so that the activated coke produced by the activation of the material is more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of preparing activated coke by rotary kiln, and more specifically, to a system for preparing activated coke particles using a rotary kiln. Background Art

[0002] Activated coke is a new product developed in recent years. The raw material semi-coke is transported to the activated coke rotary kiln silo through a belt trestle, fed to the activated coke rotary kiln through a vibrating feeder, and the product activated coke is obtained through external heat high-temperature activation. The activated coke is cooled to 50°C by circulating water, transported to a screening machine through a belt trestle for large-particle activated coke, and the fine particles are sent to a grinding machine, which grinds the fine-particle product into a qualified product. The classified products are respectively fed into the finished product packaging line for packaging. The activated coke produced by this process has the advantages of high iodine value and high yield.

[0003] In the prior art, many activated coke preparations use rotary kilns. The physical activation reaction of semi-coke and water vapor in the rotary kiln is an endothermic reaction, which results in uneven preparation of activated coke in the rotary kiln.

[0004] Therefore, the problems existing in the prior art need to be further improved and developed. Summary of the Invention

[0005] (1) Object of the Invention: To solve the problems existing in the above prior art, the object of the present invention is to provide a system for preparing activated coke particles, which can provide a device for more uniform activation of activated coke preparation and can produce high-quality activated coke particles.

[0006] (2) Technical Solution: To solve the above technical problems, the present technical solution provides a system for preparing activated coke particles, including an automatic feeding device, a rotary kiln, a screening device, and a packaging device connected in sequence. Among them, the rotary cylinder of the rotary kiln includes a cylindrical heat-insulating layer and a cylindrical outer shell wrapping the heat-insulating layer. A plurality of gas distribution pipelines are arranged between the outer wall of the heat-insulating layer and the outer shell, and a plurality of temperature detection units, gas nozzles, and image acquisition units are arranged on the inner wall of the heat-insulating layer;

[0007] The temperature detection unit, gas nozzle, and image acquisition unit are respectively connected to a control unit outside the rotary kiln;

[0008] When the volume of the material after combustion in the image collected by the image acquisition unit is less than one-half of the input volume, and the temperature of the material and the inner wall of the rotary kiln is between 800°C and 850°C, the control unit determines that the material enters the activation stage, and the control unit controls the gas nozzle to input water vapor to the material for activation. The water vapor activation generates carbon monoxide, which is an endothermic reaction;

[0009] During the material activation stage, when the temperature detected by the temperature detection unit is lower than 800 °C, the area near the temperature detection unit is a low-temperature area, and the control unit controls the gas nozzle near the temperature detection unit in the low-temperature area to introduce air in real time. The heat released by the exothermic reaction between oxygen and carbon monoxide in the air is used to compensate for the temperature of the low-temperature area.

[0010] The preparation system of the activated coke particles, wherein the rotary furnace includes a rotary cylinder body, a furnace tail, a furnace head, and a gas loading device; the furnace tail of the rotary furnace is connected to an automatic feeding device, and the material enters the rotary cylinder body from the furnace tail; the furnace head is connected to the gas loading device.

[0011] The preparation system of the activated coke particles, wherein each group of gas distribution pipelines includes two gas distribution pipelines, including a steam input pipeline and an air input pipeline; the gas spray group is a double nozzle, including a first nozzle and a second nozzle; the first nozzle is connected to the steam input pipeline, and the second nozzle is connected to the air input pipeline.

[0012] The preparation system of the activated coke particles, wherein the temperature detection unit, the gas nozzle, and the image acquisition unit are integrally arranged on the mounting plate; the mounting plates are evenly arranged on the radial circumference of the inner wall of the rotary cylinder body insulation layer and evenly arranged in the axial direction of the inner wall of the rotary cylinder body insulation layer.

[0013] The preparation system of the activated coke particles, wherein one mounting plate is arranged every 60 degrees in the radial direction of the inner wall of the rotary cylinder body, and one mounting plate is arranged every 30 cm in the axial direction of the inner wall of the rotary body.

[0014] The preparation system of the activated coke particles, wherein a cylindrical gas nozzle is provided to cover the first nozzle and the second nozzle and form a gas accommodation space, and the injection holes of the gas nozzle are arranged on the side wall so that the steam and / or air are sprayed parallel to the material layer.

[0015] The preparation system of the activated coke particles, wherein the first nozzle and the second nozzle face the radial direction of the rotary cylinder body, and the openings face the center of the rotary cylinder body.

[0016] The preparation system of the activated coke particles, wherein the image acquisition unit is an infrared camera, and the control unit observes the temperature of the surface layer of the material through the infrared camera; when it is observed that there is a low-temperature area with a temperature lower than 800 °C and a specified area on the surface layer of the material, the control unit controls the lifting device near the low-temperature area to pop out and lift the material; at the same time, the control unit controls a plurality of second nozzles facing the low-temperature area to input air.

[0017] The described preparation system for activated coke particles, wherein the lifting device includes a lifting plate and a push-pull unit connected to the lifting plate. The push-pull unit includes a slide rail fixed on an arc-shaped base and a slider fixed on the lifting plate. The slider is connected to a retracting device, and the retracting device uses a spring and a control chain to pull the slider between fixed positions.

[0018] (III) Beneficial effects: The preparation system for activated coke particles provided by the present invention first judges whether the material enters the activation process through image acquisition and analysis, as well as temperature acquisition, and uses the control unit to make the judgment. After the material enters the steam activation, the air compensation method is adopted to compensate the air in the low-temperature area, making the activated coke produced by the material activation more uniform. In addition, for the low-temperature area of the present invention, a lifting device can also be used to lift the material to promote the combustion and activation of the material. Finally, the nozzles for inputting steam and air in the present invention are improved to be submerged in the material, so that the steam and air can be completely immersed in the material, making the activation more sufficient. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a preparation system for activated coke particles of the present invention;

[0020] Figure 2 is a schematic structural diagram of the rotary kiln of the present invention;

[0021] Figure 3 is a schematic structural diagram of the automatic control part in the preparation system for activated coke particles of the present invention;

[0022] Figure 4 is a schematic internal structure diagram of the rotary kiln of the present invention;

[0023] Figure 5 is a schematic structural diagram of the lifting device of the present invention;

[0024] Figure 6 is a schematic structural diagram of the gas nozzle of the present invention. Detailed Embodiments

[0025] The following further describes the present invention in detail with reference to the preferred embodiments. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is clearly capable of being implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0026] The drawings are schematic diagrams of the embodiments of the present invention. It should be noted that this drawing is only for illustration and is not drawn according to the condition of equal proportion, and should not be used to limit the actual scope of protection required by the present invention.

[0027] A preparation system for activated coke particles provided by the present invention, as Figure 1 shown, includes an automatic feeding device, a rotary kiln 100, a screening device, a grinding device, and a packaging device connected in sequence. The automatic feeding device mixes lignite and semi-coke in a certain proportion, for example, the weight ratio of lignite to semi-coke is 1:3.59, to obtain the material of the activated coke raw material, and feeds the material into the rotary kiln 100 through a screw feeding device. After the material is activated in the rotary kiln, activated coke particles are prepared. The activated coke particles are continuously discharged from the discharging device at the furnace head end, and are made into finished products through the screening device, the grinding device, and the packaging device.

[0028] A preparation system for activated coke particles of the present invention includes an automatic feeding device, a rotary kiln, a screening device, and a packaging device connected in sequence. The rotary cylinder of the rotary kiln includes a cylindrical heat preservation layer and a cylindrical outer shell wrapping the heat preservation layer. A plurality of gas distribution pipelines are arranged between the outer wall of the heat preservation layer and the outer shell, and a plurality of temperature detection units, gas nozzles, and image acquisition units are arranged on the inner wall of the heat preservation layer. The temperature detection unit, the gas nozzle, and the image acquisition unit are respectively connected to a control unit outside the rotary kiln. The volume of the material after combustion in the image collected by the image acquisition unit is less than one-half of the input volume, and the temperature of the material and the inner wall of the rotary kiln is between 800 °C and 850 °C. The control unit determines that the material enters the activation stage, and the control unit controls the gas nozzle to input water vapor to activate the material. The water vapor activation generates carbon monoxide, which is an endothermic reaction. During the material activation stage, when the temperature of the temperature detection unit is lower than 800 °C, the area near the temperature detection unit is a low-temperature area, and the control unit controls the gas nozzle near the temperature detection unit in the low-temperature area to continuously introduce air, and the oxygen in the air reacts with carbon monoxide to generate heat, and the heat generated by the exothermic reaction compensates for the temperature in the low-temperature area.

[0029] The rotary kiln 100, as Figure 2 shown, includes a rotary cylinder 110, a furnace tail 120, a furnace head 130, and a gas loading device 140; the furnace tail of the rotary kiln is connected to the automatic feeding device, and the material enters the rotary kiln 100 from the furnace tail 120; the furnace head 130 is connected to the gas loading device 140, as Figure 2 shown. The gas loading device 140 can input air, water vapor, or a mixed gas of air and water vapor into the rotary cylinder 110 of the rotary kiln through a pipeline. The gas enters the rotary cylinder 110 of the rotary kiln from the furnace head and is finally discharged into the chimney through incineration at the furnace tail. During the whole process, the material and the gas flow in opposite directions to complete the combustion carbonization and activation of the material, and high-quality activated coke particles are obtained. The gas loading device 140 includes a steam production unit and an air input unit.

[0030] The rotary cylinder 110 of the rotary kiln of the present invention is about 20 to 30 meters long, about 2.5 meters in diameter, and has a material load of 8 to 10 tons. The rotary kiln is an internal heating type rotary kiln, which provides heat energy through the combustion of materials, and completes the carbonization and activation processes within the same rotary cylinder.

[0031] As Figure 4 shown, the rotary cylinder 110 of the rotary kiln includes a cylindrical heat preservation layer 111 and a cylindrical outer shell 112 that wraps the heat preservation layer. A plurality of gas distribution pipelines are arranged between the outer wall of the heat preservation layer and the outer shell. A number of temperature detection units, gas nozzles and image acquisition units are arranged on the inner wall of the heat preservation layer 111. The gas distribution pipelines on the outer wall of the heat preservation layer pass through the heat preservation layer and are connected to the gas nozzles. Preferably, the present invention includes multiple groups of gas distribution pipelines, and each group of gas distribution pipelines includes two gas distribution pipelines, including a steam input pipeline and an air input pipeline. Other gases can also be input through the steam input pipeline and the air input pipeline according to needs, and the present invention does not make any restrictions. The image acquisition unit of the present invention is preferably an infrared camera.

[0032] The inclination angle of the rotary cylinder of the rotary kiln of the present invention should be between 17 degrees and 19 degrees. By rotating the rotary cylinder, the function of stirring the materials is realized, so that the materials are fully contacted, mixed, convected, burned, etc. with the gas, and the materials move forward slowly under the action of the material force, and come out from the furnace head of the rotary cylinder of the rotary kiln to complete the preparation of activated coke.

[0033] In the present invention, a plurality of lifting devices 113 are embedded in the inner wall of the heat preservation layer 111 of the rotary cylinder 110. Under the control of the control unit, the lifting plates 210 of the lifting devices 113 are pushed out from the inner wall of the heat preservation layer and lift the materials, playing the role of lifting and stirring the materials; after the lifting function of the lifting plates 210 is completed, the control unit controls the lifting plates 210 of the lifting devices 113 to contract back to the space between the heat preservation layer and the outer shell. The materials rotate and advance in the rotary cylinder 110, and the control unit 115 obtains the temperature values of the temperature detection units on the inner wall of the heat preservation layer in real time to obtain the temperature values on the contact surface between the materials and the inner wall of the heat preservation layer in real time.

[0034] The temperature detection unit, gas nozzle, image acquisition unit and material lifting device 113 of the present invention are respectively connected to the control unit 115 outside the rotary kiln. As Figure 3 shown, it belongs to the automatic control part of the activated coke particle preparation system.

[0035] Preferably, a temperature detection unit, a gas nozzle and an image acquisition unit are uniformly arranged on the inner wall of the heat preservation layer 111. For the convenience of construction, the temperature detection unit, the gas nozzle and the image acquisition unit of the present invention can be integrally arranged on the mounting plate 114 for convenient integral installation. The mounting plates are uniformly arranged in the radial and axial directions on the inner wall of the rotary cylinder. One mounting plate is arranged every 60 degrees in the radial direction of the inner wall of the rotary cylinder, and one mounting plate is arranged every 30 cm in the axial direction of the inner wall of the rotary body. The uniform arrangement of the mounting plates of the present invention is to collect rich temperature signals and image signals through the uniformly arranged temperature detection unit and image acquisition unit, so as to precisely control the gas sent into the rotary cylinder of the rotary furnace by the gas nozzle through the control unit and improve the production quality of activated coke. The present invention also provides a lifting device embedded near each mounting plate, which is used to control the movement state of the lifting device through the control unit to precisely stir the activated coke material during the preparation process, so as to improve the uniformity of the activated coke and reduce the useless stirring of the lifting device at the same time. The distance between the lifting device and the mounting plate is preferably 10 cm.

[0036] The lifting device 113, such as Figure 5 shown, includes a lifting plate 210 and a push-pull unit 220 connected to the lifting plate. The push-pull unit 220 includes a slide rail 222 fixed on an arc-shaped base 221 and a slider 211 fixed on the lifting plate. One end of the arc-shaped base 221 is connected to the inner wall of the heat preservation layer so that the lifting plate 210 passes through the mounting plate 114, and the other end is fixed on the inner wall of the outer shell. The arc-shaped base 221 is consistent with the rotation direction of the rotary cylinder 110 from the side connected to the mounting plate to the side connected to the outer shell. The side of the arc-shaped base connected to the mounting plate is higher than the side of the arc-shaped base connected to the outer shell.

[0037] A first fixed position 223 and a second fixed position 224 are arranged on the slide rail 222 of the arc-shaped base 221. The lifting plate 210 realizes the sliding of the slider on the slide rail 222 through the expansion and contraction of a spring 212 on the slider 211, and realizes the sliding of the slider 211 from the first fixed position 223 to the second fixed position 224. The first fixed position 223 and the second fixed position 224 are adapted to the slider on the lifting plate. The first fixed position 223 is used to retract the lifting plate 210 into the heat preservation layer, and the second fixed position 224 is used to push the lifting plate 210 out of the heat preservation layer.

[0038] On the slide rail 222 of the arc-shaped base 221, a first fixed position 223 and a second fixed position 224 are provided. The lifting plate 210 realizes the sliding of the slider on the slide rail 222 through the expansion and contraction of the spring 212 on the slider 211, and realizes the sliding of the slider 211 from the first fixed position 223 to the second fixed position. The first fixed position 223 and the second fixed position 224 are adapted to the slider on the lifting plate. The first fixed position 223 is used to retract the lifting plate 210 into the heat preservation layer, and the second fixed position 224 is used to push the lifting plate 210 out of the heat preservation layer.

[0039] At one end of the arc-shaped base 221 fixedly connected to the outer shell, a retracting device is provided. The retracting device uses a spring and a control chain 233 to pull the slider between the fixed positions. The retracting device includes a reel 231, a rotating motor 232, and a control chain 233. The rotating motor 232 is fixed on the arc-shaped edge of one end of the arc-shaped base 221 fixedly connected to the outer shell, and the rotating shaft of the rotating motor 232 is parallel to the end of the arc-shaped base 221 connected to the outer shell. The reel 231 is fixedly connected to the rotating shaft of the rotating motor 232 and is on the same straight line as the rotating shaft of the rotating motor 232. The reel 231 is provided with two groups of partition plates 234. Each group of partition plates 234 includes two partition plates 234. On the reel 231 between the two partition plates 234 of each group, the control chain 233 is respectively wound. The control chains 233 between the two groups of partition plates 234 are respectively opposite to both sides of one end of the spring 212 connected to the slider 211. One ends of the two control chains 233 are fixedly connected to the reel 231, and the other ends are respectively correspondingly connected to one end of the spring 212 connected to the slider 211.

[0040] The partition plates 234 are respectively fixed on the arc-shaped base 221, and through holes corresponding to the reel 231 are respectively provided on the partition plates 234. The reel 231 sequentially passes through the through holes on the plurality of partition plates 234. A protective pad can be provided on the through holes to avoid friction between the reel 231 and the partition plates 234 and increase the service life of the partition plates. The through holes of the partition plates 234 play a synchronous supporting role for the reel 231.

[0041] When it is necessary to eject the lifting plate 210, the rotating motor 232 rotates in the direction of releasing the control chain 233 to ensure that the spring 212 ejects the lifting plate 210. When it is necessary to retract the lifting plate 210, the rotating motor 232 rotates in the opposite direction (the direction of retracting the control chain 233) to ensure that the slider 211 retracts the lifting plate and fixes the slider 211 at the first fixed position 223. The first fixed position 223 and the second fixed position 224 are respectively provided with fixing blocks and regulating support frames, and the regulating support frames receive control commands from the control unit 115 to realize the pushing out or retracting of the fixing blocks. The regulating support frame can be a telescopic frame, which is not specifically limited here.

[0042] The control unit of the present invention acquires the image obtained by the image acquisition unit. The image acquisition unit preferably uses an infrared camera to collect and detect the temperature of the material in the rotary cylinder 110. The infrared thermal imager preferably can use the YZSG-FL-II-B type high-temperature industrial video acquisition system for strip steel heating furnaces.

[0043] The control unit uses the temperature detection unit and the infrared camera to comprehensively detect the temperature of the material in the rotary cylinder. The temperature detection unit real-time collects the temperature of the part where the material contacts the rotary cylinder, and the infrared camera real-time collects the temperature distribution on the surface of the material.

[0044] The control unit controls the gas pipelines, the types of ventilation, and the ventilation volume of the gas nozzles in the rotary furnace cylinder according to the volume and temperature distribution of the material in the rotary cylinder to adjust the carbonization reaction and / or activation reaction of the activated coke in the rotary furnace.

[0045] The control unit acquires the real-time image in the rotary cylinder and divides the real-time image in the rotary cylinder into two parts. Starting from the furnace tail of the rotary cylinder and moving in the furnace head direction, it is divided into: a carbonization part and an activation part. The gas nozzles in the carbonization part are filled with air, and the gas nozzles in the activation part are filled with water vapor. And under the condition of air supplement, through the double nozzles, water vapor and air are simultaneously introduced.

[0046] The air in the carbonization part makes the material burn and heat up. There will be a mixed gas of part of the air and water vapor in the mixing part. The activation part is filled with water vapor, and through the way of air compensation, the air is input through the double nozzles.

[0047] A gas pipeline is laid in the space between the heat-insulating layer of the rotary cylinder body and the outer shell of the present invention. A gas nozzle is arranged on the inner wall of the heat-insulating layer of the rotary cylinder body. The gas nozzle is connected to the gas pipeline, and the gas nozzle is installed on the mounting plate. The gas nozzle can be a double nozzle. At this time, each group of gas distribution pipelines includes two gas distribution pipelines, which is convenient for adjusting the input amount of the mixed gas in the rotary cylinder body. Each group of gas distribution pipelines of the present invention includes a double gas distribution pipeline, including a water vapor input pipeline and an air input pipeline. The water vapor input pipeline is connected to a vapor production unit through a water vapor valve, and the other end of the water vapor input pipeline is connected to a first nozzle; the air input pipeline is connected to an air input unit, one end of the air input pipeline is connected to an air input device through an air valve, and the other end of the air input pipeline is connected to a second nozzle. The control unit controls the gas input of the first nozzle and the second nozzle by controlling the opening and closing of the water vapor valve and the air valve.

[0048] In the present invention, the first nozzle 410 and the second nozzle 420 are covered by a cylindrical gas spray head 430, as Figure 6 shown. The gas spray head 430 covers the first nozzle 410 and the second nozzle 420 and forms a gas accommodation space. The first nozzle 410 and the second nozzle 420 face the radial direction of the rotary cylinder body, and the openings face the center of the rotary cylinder body. The spray holes 431 of the gas spray head 430 are arranged on the side wall, so that water vapor and / or air are sprayed parallel to the material layer, that is, sprayed along the horizontal line of the material, which can make the input water vapor and / or air completely immerse in the material, contact the activated coke material layer as much as possible, and reduce the gas penetration through the activated coke material layer; at the same time, it can also prevent the material from blocking the gas nozzle.

[0049] During the activation process of the activated coke material in the rotary furnace of the present invention, the present invention can analyze the combustion image and combustion temperature of the material particles, and improve the quality of the activated coke by means of air compensation during the activation process. The activation of the activated coke particles in the rotary furnace of the present invention is mainly carried out by water vapor activation and air compensation to improve the uniformity of the activation process of the activated coke. The detailed process is as follows:

[0050] The water vapor activation of activated coke particles is a chemical reaction between carbon and water vapor. The chemical formula of the chemical reaction is:

[0051] C+H2O----→H2+CO-131kJ

[0052] The main component of the activated coke particles is carbon. The above chemical reaction is the water gas reaction of carbon gasification. This activation reaction is an endothermic reaction - cooling effect, and external heat supply should be provided, so superheated steam is mostly used; the combustible reaction gas water gas generated burns to recover heat, which can balance the heat supply.

[0053] Steam activation is slow and stable, and excellent activated coke particles can be obtained. Oxygen will cause the carbon surface to burn off and reduce the finished product yield of carbon. To reduce the amount of oxygen mixed in, the air mixed in should be minimized as much as possible. Steam activation is carried out under oxygen isolation conditions at 750°C to 950°C.

[0054] In addition, the air (oxygen) activation reaction, that is, the chemical process of carbon reacting with oxygen, is as follows:

[0055] C + O2 → CO2 + 386.2 kJ (below 600°C)

[0056] 2C + O2 → 2CO + 225.6 kJ (800 - 900°C)

[0057] The above two chemical reactions are both exothermic reactions and can be carried out at relatively low temperatures. The ratio of the two products CO and CO2 increases with the increase of temperature.

[0058] The control unit of the present invention monitors the real-time image of the material in the rotary cylinder through an infrared camera and a temperature detection unit, including the volume and temperature of the material. When the material enters the inside of the rotary cylinder, the control unit controls the opening of the air valve corresponding to the gas nozzle within the length of the cylinder in contact with the material, and the material burns in contact with the air and enters the carbonization stage; when the volume of the material burned is one-half of the input volume, the control unit determines that the material enters the activation stage, the control unit opens the steam valve and closes the air valve, and the material enters the activation stage.

[0059] When the volume of the material after burning is less than one-half of the input volume, and the temperature of the material and the inner wall of the rotary furnace is between 800°C and 850°C, the control unit controls and determines that the material enters the activation stage, and the gas nozzle performs heat balance adjustment in real time during the activation process of the material through a precise air compensation method.

[0060] During the activation stage of the material, when the temperature of the temperature detection unit is lower than 800°C, the area near the temperature detection unit is a low-temperature area. The control unit controls the second nozzle near the temperature detection unit in the low-temperature area to introduce air in real time, compensates the air in the low-temperature area through the air compensation method, and the introduced air causes the reaction of CO + 02. The heat generated by the exothermic reaction of oxygen in the air with carbon monoxide compensates the temperature of the low-temperature area in the furnace.

[0061] In addition, the control unit observes the temperature of the surface layer of the material through an infrared camera. If a low-temperature area larger than a specified area is observed on the surface layer of the material, that is, it is found that the temperature of the agglomerated large activated coke granular material is lower than 800 °C, the control unit of the present invention controls the lifting plates near the low-temperature area to pop up and lift the material. At the same time, the control unit controls a plurality of second nozzles facing the low-temperature area to input air, so that most of the material can be burned after contacting with water vapor and oxygen, providing heat for the furnace while obtaining uniform activated coke particles.

[0062] The amount of air input by the second nozzle controlled by the control unit of the present invention is related to the temperature and area of the monitored low-temperature area. The present invention uses the second nozzle to compensate for the added air, preferably in a multi-stage pressure-decreasing inflation method. For example, for a low-temperature area of 40 square centimeters and 800 °C on the surface layer of the material, the present invention inflates with 0.25 MPa at a speed of 0.02 cubic meters per second for 5 minutes; then inflates with 0.2 MPa at a speed of 0.016 cubic meters per second for 5 minutes; finally, inflates with 0.15 MPa at a speed of 0.01 cubic meters per second for 5 minutes for air compensation.

[0063] A system for preparing activated coke particles provided by the present invention first judges whether the material enters the activation process through image acquisition and analysis, and temperature acquisition, and uses the control unit. After the material enters the steam activation, an air compensation method is adopted to compensate for the air in the low-temperature area, making the activated coke produced by the material activation more uniform; in addition, for the low-temperature area, the present invention can also use a lifting device to lift the material to promote the combustion and activation of the material; finally, the nozzles for inputting steam and air of the present invention are improved to be submerged in the material, so that the steam and air can be completely immersed in the material, making the activation more sufficient.

[0064] The above content is an illustration of the preferred embodiments of the present invention, which can help those skilled in the art understand the technical solution of the present invention more fully. However, these embodiments are only examples and cannot be considered that the specific implementation manners of the present invention are limited to the descriptions of these embodiments. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions and transformations can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A preparation system for activated coke particles, comprising an automatic feeding device, a rotary kiln, a screening device and a packaging device connected in sequence, characterized in that, The rotating cylinder of the rotary kiln includes a cylindrical heat-insulating layer and a cylindrical outer shell that wraps the heat-insulating layer. A plurality of gas distribution pipelines are arranged between the outer wall of the heat-insulating layer and the outer shell. A number of temperature detection units, gas nozzles, and image acquisition units are arranged on the inner wall of the heat-insulating layer; The temperature detection units, gas nozzles, and image acquisition units are respectively connected to a control unit outside the rotary kiln; In the image collected by the image acquisition unit, the volume of the burned material is less than one-half of the input volume. The temperature of the material and the inner wall of the rotary kiln is between 800 °C and 850 °C. The control unit determines that the material enters the activation stage. The control unit controls the gas nozzles to input water vapor to activate the material. The activation of water vapor generates carbon monoxide, which is an endothermic reaction; During the activation stage of the material, when the temperature of the temperature detection unit is lower than 800 °C, the area near the temperature detection unit is a low-temperature area. The control unit controls the gas nozzles near the temperature detection unit in the low-temperature area to continuously introduce air in real time. The oxygen in the air reacts with carbon monoxide to generate heat, and the heat generated by the exothermic reaction compensates for the temperature in the low-temperature area.

2. The preparation system of an activated coke particle according to claim 1, characterized in that, The rotary kiln includes a rotating cylinder, a furnace tail, a furnace head, and a gas loading device; the furnace tail of the rotary kiln is connected to an automatic feeding device, and the material enters the rotating cylinder from the furnace tail; the furnace head is connected to the gas loading device.

3. The preparation system of activated coke particles according to claim 2, characterized in that Each group of gas distribution pipelines includes two gas distribution pipelines, including a water vapor input pipeline and an air input pipeline; the gas nozzle group is a double nozzle, including a first nozzle and a second nozzle; the first nozzle is connected to the water vapor input pipeline, and the second nozzle is connected to the air input pipeline.

4. The preparation system of activated coke particles according to claim 3, characterized in that, The temperature detection units, gas nozzles, and image acquisition units are integrally arranged on a mounting plate; the mounting plates are evenly arranged on the radial circumference of the inner wall of the heat-insulating layer of the rotating cylinder and are evenly arranged axially on the inner wall of the heat-insulating layer of the rotating cylinder.

5. The preparation system of an activated coke particle according to claim 4, characterized in that, One mounting plate is arranged every 60 degrees in the radial direction of the inner wall of the rotating cylinder, and one mounting plate is arranged every 30 cm in the axial direction of the inner wall of the rotating cylinder.

6. The preparation system of activated coke particles according to claim 3, characterized in that, A cylindrical gas nozzle is provided to cover the first nozzle and the second nozzle and form a gas accommodation space. The injection holes of the gas nozzle are arranged on the side wall, so that water vapor and / or air are sprayed parallel to the material layer.

7. The preparation system of activated coke particles according to claim 6, characterized in that The first nozzle and the second nozzle face the radial direction of the rotating cylinder, and the openings face the center of the rotating cylinder.

8. The preparation system of an activated coke particle according to claim 5, characterized in that, The image acquisition unit is an infrared camera. The control unit observes the temperature of the surface layer of the material through the infrared camera; when it is observed that there is a low-temperature area with a temperature lower than 800 °C and a specified area greater than the specified area on the surface layer of the material, the control unit controls the raising device near the low-temperature area to pop out and raise the material; at the same time, the control unit controls a plurality of second nozzles facing the low-temperature area to input air.

9. The preparation system of an activated coke granule according to claim 8, characterized in that, The raising device includes a lifting plate and a push-pull unit connected to the lifting plate. The push-pull unit includes a slide rail fixed on an arc-shaped base and a slider fixed on the lifting plate. The slider is connected to a retracting device, and the retracting device uses a spring and a control chain to pull the slider between fixed positions.

Images