Air injection device and activated carbon production device

Abstract

The present invention relates to an air injection device and an activated carbon production device, wherein the air injection device comprises an air injection pipe and an air mixer connected to the air injection pipe, an air outlet is provided at the end of the air injection pipe, and an air baffle is provided in front of the air outlet in the direction from the air injection pipe to the air mixer. The air injection device of the present invention can ensure that air is uniformly delivered to the activated carbon production device, eliminate the phenomenon of oxygen deficiency or over-oxygen combustion at various points in the device, and ensure uniform and sufficient activation of materials.

Description

Technical Field

[0001] The invention belongs to the field of activated carbon production, and in particular relates to an air injection device and an activated carbon production device comprising the air injection device. Background Art

[0002] SLEP furnace (Slep furnace) activation method is a method of alternately activating using water vapor and flue gas as activators. The carbon particles can be dislocated and mixed in the process of moving from top to bottom in the furnace, so the activation effect is uniform. This type of furnace has the advantages of no need for external fuel, long furnace service life, stable activation process conditions, uniform product quality, good adsorption performance, etc. It is superior to other forms of activation furnaces in terms of product quality, energy consumption, economic benefits, three wastes treatment, etc. It is an ideal furnace for producing high-quality granular activated carbon.

[0003] However, the prior art uses SLEP furnaces in combination with water vapor and flue gas as activators, which results in complex process control, large temperature fluctuations, low output, high consumption, uneven product quality, large product limitations, poor material cooling effects, serious material sloshing, and long activation time.

[0004] For example, patent CN205907042U discloses a high-efficiency activation furnace, which has an activation chamber, and an air duct and a steam duct are arranged on the inner wall of the activation chamber, and air and steam are respectively sent into the activation chamber through the air duct and the steam duct 15. The air duct is provided with a plurality of first nozzles, and the first nozzles are arranged tangentially along the inner wall of the activation chamber. The air duct 14 is connected to the fan through a main air duct. The patent ensures that the air enters tangentially along the inner wall of the activation chamber through the tangential arrangement of multiple nozzles to ensure that the material is fully burned.

[0005] However, the structure of this patent is complex, the position requires high precision, and it cannot ensure that the air ejected through the first nozzle enters the activation chamber evenly, which can easily cause overoxygen or hypoxia in the activation chamber, resulting in unstable combustion in the activation chamber, and often incomplete combustion or overburning, resulting in poor performance or even unqualified activated carbon produced. Summary of the invention

[0006] The object of the present invention is to solve the above-mentioned problems and to provide an air injection device and an activated carbon production device comprising the air injection device to solve the problem of oxygen deficiency or excessive oxygen combustion in the activated carbon production device.

[0007] To achieve the above-mentioned purpose, the present invention provides an air injection device, including an air injection pipe and an air mixer connected to the air injection pipe, an air outlet hole is provided at the end of the air injection pipe, and an air deflector is provided on the front side of the air outlet hole along the direction from the air injection pipe to the air mixer.

[0008] According to one aspect of the present invention, the air injection pipe includes a conveying portion and a pressurizing portion which are sequentially connected, and the air outlet is provided at a terminal end of the pressurizing portion.

[0009] According to an aspect of the present invention, the inner diameter of the pressurizing portion gradually decreases in a direction away from the conveying portion.

[0010] According to one aspect of the present invention, the air injection device further comprises an air duct located after the air mixer and connected to the air mixer, and a plurality of air distribution ports are provided on the air duct.

[0011] According to one aspect of the present invention, the plurality of air distribution ports are symmetrically arranged about the air injection pipe.

[0012] According to one aspect of the present invention, the diameters of the plurality of air distribution ports gradually increase as they extend toward both sides of the air injection pipe.

[0013] According to one aspect of the present invention, the air deflector may be configured as an arc-shaped baffle, a triangular baffle or a trapezoidal baffle.

[0014] According to one aspect of the present invention, the air injection device further includes a heat insulating material disposed outside the air injection pipe and the air mixer.

[0015] The present invention also provides an activated carbon production device including an air injection device, including two half-furnaces, each half-furnace including a furnace body, a heat storage chamber, an upper flue connecting the furnace body and the heat storage chamber, and a lower flue connected to the combustion chamber of the furnace body, in which a preheating section, a supplementary carbonization section, an activation section and a cooling section are arranged in sequence from top to bottom, and the air injection device is respectively arranged in the supplementary carbonization section and / or the activation section.

[0016] According to one aspect of the present invention, the activated carbon production device further comprises a DCS control system, a flow regulating valve is provided on the air injection pipe, and the DCS control system is used to control the flow regulating valve.

[0017] According to one aspect of the present invention, the product channel width of the activation section is set to 15-80 mm.

[0018] According to one aspect of the present invention, the cooling section is provided with a forced cooler, and the forced cooler comprises at least one of the following: a circulating water cooling channel and an air cooling channel.

[0019] According to one aspect of the present invention, the ratio of the height of the supplementary carbonization section to the height of the activation section is 1:5.

[0020] According to one aspect of the present invention, the regenerator of the activated carbon production device further comprises an activator injection device, and the activator injection device comprises an injection pipe, the injection pipe is provided with an activator inlet, and the injection pipe is also provided with a catalyst inlet.

[0021] According to one aspect of the present invention, the end of the injection pipe opposite to the activator inlet is closed, and a plurality of injection holes are provided along the length direction of the injection pipe.

[0022] According to one aspect of the present invention, the gaps between the injection holes gradually increase along the length direction in a direction away from the activator inlet.

[0023] According to one aspect of the present invention, the injection pipe extends into the heat storage chamber, the activator inlet and the catalyst inlet are located outside the heat storage chamber, and the injection hole is located in the heat storage chamber and arranged toward the bottom of the heat storage chamber.

[0024] According to one aspect of the present invention, heat storage bricks are provided inside the heat storage chamber and above the injection pipe, and a distributor is provided between the heat storage bricks and the injection pipe.

[0025] According to one aspect of the present invention, the heat storage bricks are grid-shaped heat storage bricks built inside the heat storage chamber.

[0026] According to one aspect of the present invention, the distributor is an activator distribution column arranged above the injection pipe and under the heat storage brick.

[0027] According to one aspect of the present invention, the activator distribution bar is made of heat storage bricks.

[0028] According to one aspect of the present invention, the outer wall of the heat storage chamber is provided with a heat insulating material.

[0029] According to one aspect of the present invention, the reaction temperature of the activation stage is 900° C.-980° C., the pressure of the activating agent is 0.4-0.6 MPa, and the flow rate is 1500-2500 kg / h.

[0030] According to one aspect of the present invention, the air flow rate of the air injection device is 1000-1500m 3 / h, wind pressure 2000-3000Pa.

[0031] According to one aspect of the present invention, the activating agent is water vapor or flue gas or a mixture of water vapor and flue gas.

[0032] The air injection device of the present invention adds an air baffle at the front end of the air injection pipe, so that the air intake can be effectively decelerated, diffused and baffled, and the air flow rate and direction can be effectively controlled. This is conducive to ensuring that the air can finally enter the activated carbon production device evenly, avoiding the phenomenon of hypoxia or over-oxygen combustion in the furnace body, solving the problem of large temperature fluctuations at various points and uneven material activation, ensuring the full activation of the material, and improving the performance of the activated carbon.

[0033] In the air injection device of the present invention, air enters through the air injection pipe, passes through the pressurizing part where the airflow is blocked and pressurized due to the gradual reduction in the pipe diameter, and then the airflow is injected into the air mixer. Due to the effect of the air deflector, the air is decelerated and dispersed, and enters the air mixer with a gradually increasing inner diameter, so that the air is decelerated and mixed again, and then evenly enters the air duct, and is evenly delivered to the activated carbon production device through multiple air distribution ports on the air duct.

[0034] In the air injection device of the present invention, the multiple air distribution ports on the air duct are arranged symmetrically about the air injection pipe axis, and extend along the position of the air injection pipe to both sides thereof, and the diameters of the multiple air distribution ports gradually increase. Such arrangement is more conducive to the uniformity and distribution of the air flow derived from the air mixer, and the gradual increase in the diameters of the multiple air distribution ports further ensures that the air output volume away from the air mixer outlet will not be reduced due to the decrease in air flow rate, thereby avoiding the problem of uneven combustion or even burning materials caused by the difficulty in controlling the air flow rate and uniformity in the prior art.

[0035] The activated carbon production device of the present invention is further provided with a forced cooler at the cooling section, and the forced cooler includes a circulating water cooling channel and an air cooling channel. Such a configuration can reduce the material temperature to less than or equal to 100°C, compared with the original activated carbon production device with a steel channel cooler, thereby avoiding the defect that the original activated carbon production device with a steel channel cooler can only reduce the material temperature to 200-350°C, resulting in damaged product quality and high equipment burnout rate.

[0036] In the activated carbon production device of the present invention, the injection pipe of the activator injection device is also provided with a catalyst inlet, and the catalyst inlet is located outside the heat storage chamber. Such a configuration allows the catalyst to be added to the injection pipe through the catalyst inlet, so that the catalyst and the activator enter the activation section together, which is beneficial to optimizing the reaction effect of the activator and the raw carbon, and improving various properties of the final activated carbon.

[0037] In the activated carbon production device of the present invention, a spray hole is provided on the spray pipe, and the spray hole is arranged toward the bottom of the heat storage chamber. Such an arrangement enables the activator to first move downward to contact the bottom of the heat storage chamber and then move upward, which is beneficial to slow down the diffusion of the activator, thereby facilitating the control of the flow rate and uniformity of the activator, so that the activator is heated evenly.

[0038] In the activated carbon production device of the present invention, grid-shaped refractory bricks are built inside the heat storage chamber as heat storage bricks, which can increase the heat exchange capacity of the activator, that is, the heat exchange efficiency, stabilize the temperature of the activator, and react more fully with the carbonized material. At the same time, it is also beneficial to lower the temperature of the flue gas from the upper flue.

[0039] In the activated carbon production device of the present invention, the activator injection device is controlled by a DCS control unit so that the injection amount of the activator is matched with the furnace pressure of the cooling half furnace to achieve interlocking. The furnace pressure of the cooling half furnace of the activated carbon production device is set, and the injection amount of the activator is automatically adjusted by the DCS to achieve intelligent control of the activator injection amount.

[0040] The activated carbon production device of the present invention is supplemented with air injection devices respectively arranged in the carbonization section and / or activation section on the furnace body, and an air deflector is added to the front end of the air injection pipe, so that the incoming air can be effectively decelerated, diffused, and deflected, and effective control of the air flow rate and direction can be achieved. It is beneficial to ensure that the air can eventually enter the furnace body of the activated carbon production device evenly, ensure the full activation of the material, improve the performance of the activated carbon, increase the output of the activated carbon, and stabilize the indicators. It avoids the phenomenon of hypoxia or over-oxygen combustion in the furnace body, solves the problems of large temperature fluctuations at various points and uneven activation of materials. In addition, the air injection device of the present invention is controlled by a DCS control system, and the air consumption can be automatically adjusted by the DCS to ensure stable air distribution, which can save air consumption, while ensuring process stability and reducing the difficulty of process control. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A cross-sectional view schematically showing an air injection device according to one embodiment of the present invention;

[0042] Figure 2 A right side view schematically showing an air injection device according to an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of an activated carbon production device according to an embodiment of the present invention;

[0044] Figure 4 The schematic diagram shows a product channel diagram of an activated carbon production device according to an embodiment of the present invention;

[0045] Figure 5 A schematic front view of a forced cooler according to an embodiment of the present invention is shown;

[0046] Figure 6 Schematically showing a left side view of a forced cooler according to one embodiment of the present invention;

[0047] Figure 7A cross-sectional view schematically showing a regenerator and an activator injection device according to one embodiment of the present invention;

[0048] Figure 8 Schematically showing a side view of a regenerator and an activator injection device according to one embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0051] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0052] like Figure 1 As shown, according to one embodiment of the present invention, the air injection device of the present invention includes an air injection pipe 61 and an air mixer 62 connected to the air injection pipe 61. Figure 1 As shown, an air inlet is arranged at one end of the air injection pipe 61, and an air outlet is arranged at the end thereof. An air deflector 63 is arranged in front of the air outlet in the direction from the air injection pipe 61 to the air mixer 62.

[0053] The air injection device of the present invention adds an air baffle 63 at the front end of the air injection pipe 61, so that the air intake can be effectively decelerated, diffused, and baffled, and the air flow rate and direction can be effectively controlled. This is conducive to ensuring that the air can finally enter the activated carbon production device evenly, avoiding the occurrence of hypoxia or over-oxygen combustion in the device, solving the problems of large temperature fluctuations at various points and uneven material activation, ensuring the full activation of the material, and improving the performance of the activated carbon.

[0054] like Figure 1As shown, according to an embodiment of the present invention, the air injection pipe 61 of the present invention comprises a conveying portion 611 and a pressurizing portion 612 which are connected in sequence, and the air outlet is arranged at the end of the pressurizing portion 612. Specifically, in this embodiment, the air injection pipe 61 comprises a conveying portion 611 which is a cylindrical section and a pressurizing portion 612 which is a conical section, and the inner diameter of the pressurizing portion 612 gradually decreases in a direction away from the conveying portion 611, so that the pressurization effect on the air can be achieved.

[0055] Combination Figure 1 and Figure 2 As shown, the air injection device of the present invention further includes an air duct 64 located after the air mixer 62 and connected to the air mixer 62 , and a plurality of air distribution ports 641 are provided on the air duct 64 .

[0056] In the air injection device of the present invention, air enters through the air injection pipe 61, passes through the pressurizing part 612 and is pressurized because the air flow is blocked due to the gradual reduction in the pipe diameter. Due to the action of the air deflector 63, the air is decelerated and dispersed, and enters the air mixer 62 with a gradually increasing inner diameter, so that the air is decelerated and mixed, and then evenly enters the air duct 64, and is evenly delivered to the activated carbon production device through multiple air distribution ports 641 on the air duct 64.

[0057] According to one embodiment of the present invention, a plurality of air distribution ports 641 on the air duct 64 are arranged symmetrically about the axis of the air injection pipe 61. And extending along the position of the air injection pipe 61 to both sides thereof, the diameters of the plurality of air distribution ports 641 gradually increase. Such an arrangement is conducive to the uniformity of air flow, and avoids the problem of uneven combustion or even burning materials caused by the difficulty in controlling the air flow rate and uniformity in the prior art. Of course, according to the concept of the present invention, the air duct can also be arranged on one side or staggered, but the size of the air distribution holes needs to be adjusted. The above symmetrical arrangement has the best effect and a simple structure.

[0058] According to an embodiment of the present invention, the inner diameter of the air mixer 62 gradually increases in a direction away from the air injection pipe 61. In this way, after the air is blocked by the air baffle 63 and decelerated, diffused, and baffled, the air is further evenly mixed in the air mixer 62 and moves toward the air duct 64.

[0059] According to the concept of the present invention, the arrangement of the air deflector 63 of the present invention is not limited, and the arrangement may be an arc-shaped baffle, a triangular baffle, a trapezoidal baffle or other devices capable of achieving air deflection.

[0060] Combination Figure 1 and Figure 2 As shown, the air injection device further includes a heat insulating material 65 disposed outside the air injection pipe 61 and the air mixer 62 .

[0061] Combination Figure 1-Figure 3 As shown, the present invention also discloses an activated carbon production device including the above-mentioned air injection device. The activated carbon production device of the present invention includes a furnace body, which is divided into two symmetrically arranged left and right half furnaces, namely a heating half furnace and a cooling half furnace, and the heating half furnace and the cooling half furnace each include a preheating section A, a supplementary carbonization section B, an activation section C and a cooling section D in sequence from top to bottom, that is, the overall structure of the furnace body of the present invention is the same as that of a conventional SLEP furnace. The activated carbon production device of the present invention also includes a heat storage chamber F and an upper flue 14 connecting the furnace body and the heat storage chamber F, and a lower flue 15 connected to the combustion chamber of the furnace body.

[0062] In the activated carbon production device of the present invention, the air injection device 6 of the present invention is respectively arranged in the supplementary carbonization section B and the activation section C of the furnace body. The activated carbon production device of the present invention also includes a DCS control system for controlling the air injection device 6. Specifically, a flow regulating valve is arranged on the air injection pipe 61. The DCS control system is used to control the flow regulating valve, and the air injection amount is matched with the temperature of each point as a linkage, and the opening of the flow regulating valve is automatically adjusted as the temperature rises and falls.

[0063] Combination Figure 3 and Figure 4 As shown, the width of the product channel 8 of the activation section C of the activated carbon production device of the present invention is set to 15-80 mm. Specifically, the size of the product channel 8 can be controlled to be 15-80 mm by adjusting the size and position of the furnace core brick 7 to achieve the production of activated carbon with a particle size of 1.5-10 mm.

[0064] Combination Figure 3 , Figure 5 and Figure 6 As shown, the activated carbon production device of the present invention is further provided with a forced cooler 9 at the cooling section 4, and the forced cooler 9 includes at least one of the following: a circulating water cooling channel and an air cooling channel. In this embodiment, the forced cooler 9 includes a circulating water cooling channel and an air cooling channel. Such a configuration, compared with the original activated carbon production device being a steel channel cooler, can reduce the material temperature to less than or equal to 100°C, avoiding the defect that the original activated carbon production device being a steel channel cooler can only reduce the material temperature to 200-350°C, resulting in damaged product quality and a high equipment burnout rate.

[0065] Reference Figure 3 As shown, in the present invention, the height ratio of the supplementary carbonization section B to the activation section C is 1:5. This arrangement increases the proportion of the activation section C in the furnace body, which is beneficial to improving the activation effect of the material, shortening the activation time, and improving the product quality.

[0066] Combination Figure 3 and Figure 7As shown, the regenerator F of the activated carbon production device of the present invention is also provided with an activator injection device, such as Figure 7 As shown, the activator injection device of the present invention includes an injection pipe 1. According to one embodiment of the present invention, the injection pipe 1 is a cylindrical tube, and an activator inlet 11 is provided at one end for conveying the activator, and the activator is water vapor or flue gas or a mixture of water vapor and flue gas. In the present invention, a catalyst inlet 12 is also provided on the injection pipe 1, which is used to convey the activator and add the catalyst through the catalyst inlet 12. According to the concept of the present invention, the catalyst added through the catalyst inlet 12 can be an alkaline reaction liquid such as sodium hydroxide and potassium hydroxide. Since the catalyst inlet 12 is provided on the injection pipe 1, the catalyst can be added to the injection pipe 1, so that the catalyst enters the subsequent reaction section together with the activator, which is beneficial to optimize the reaction effect of the activator and the carbonized material and improve the various properties of the final activated carbon.

[0067] like Figure 7 As shown, along the length direction of the injection pipe 1, the end of the injection pipe 1 opposite to the activator inlet 11 is a closed end. A plurality of injection holes 13 are provided on the injection pipe 1. The plurality of injection holes 13 are provided along the length direction of the injection pipe 1, which is conducive to the uniform injection of the activator, thereby facilitating the uniform heating of the activator.

[0068] According to one embodiment of the present invention, the intervals between adjacent injection holes 13 gradually increase along the length direction in the direction away from the activator inlet 11, so as to further ensure the uniformity of the activator. Of course, according to the concept of the present invention, the intervals between adjacent injection holes 13 can also be set to gradually decrease in the direction away from the activator inlet 11, and multiple injection holes 13 can also be arranged at equal intervals, and the intervals can also gradually increase or decrease from the middle to both sides, or the intervals can first increase and then decrease.

[0069] According to the concept of the present invention, the shape of the injection hole 13 of the present invention is not limited, and can be set to a circular hole, a square hole, a triangular hole, etc.

[0070] Combination Figure 7 and Figure 8 As shown, the heat storage chamber of the present invention is used to heat the activator sprayed by the activator spraying device and store heat energy. Specifically, the spray pipe 1 extends into the heat storage chamber, the activator inlet 11 and the catalyst inlet 12 of the spray pipe 1 are both located outside the heat storage chamber, and the spray hole 13 on the spray pipe 1 is located in the heat storage chamber. The activator is added to the spray pipe 1 through the activator inlet 11 and sprayed into the heat storage chamber through the spray hole 13. The heat storage chamber of the present invention is provided with heat storage bricks 2, which are used to heat the activator sprayed into the heat storage chamber after heat storage.

[0071] According to one embodiment of the present invention, the injection hole 13 on the injection pipe 1 of the present invention is arranged toward the bottom of the heat storage chamber, that is, Figure 7 As shown, in this embodiment, the injection hole 13 is arranged on the lower side of the injection pipe 1. In this way, after the activator is ejected through the injection hole 13, it is first sprayed to the bottom of the heat storage chamber and then moves upward, thereby having a certain deceleration, diffusion, and deflection effect on the activator. After deceleration, diffusion, and deflection, the activator moves toward the heat storage brick 2, which is beneficial to the flow uniformity of the activator and ensures the uniformity of heating.

[0072] According to other embodiments of the present invention, the injection hole 13 of the present invention can also be arranged on the upper side or the front and rear sides of the injection pipe 1. In this case, a baffle can be arranged in the heat storage chamber to decelerate and diffuse the activator. Of course, according to the concept of the present invention, while the injection hole 13 is arranged on the lower side of the injection pipe 1 toward the bottom of the heat storage chamber, a baffle can also be arranged at the same time to enhance the deceleration and baffle effects.

[0073] like Figure 7 As shown, in the heat storage chamber of the present invention, a distributor 3 is provided between the heat storage brick 2 and the injection pipe 1, which is used to evenly distribute the activator to the heat storage brick 2 to heat the activator.

[0074] According to one embodiment of the present invention, the distributor of the present invention is configured as an activator distribution column located above the injection pipe 1 and below the heat storage brick 2. In this embodiment, the activator distribution column is vertically arranged above the injection pipe 1 and is built with heat storage bricks. According to the concept of the present invention, the distributor 3 is not limited to the above form and can be any device that can achieve the distribution function.

[0075] In the heat storage chamber of the present invention, a distributor 3 is arranged between the injection pipe 1 and the heat storage brick 2. After the activator is ejected through the injection hole 13, it is first sprayed to the bottom of the heat storage chamber, and after being decelerated, diffused, and deflected, it moves upward uniformly in the heat storage chamber through the distribution effect of the distributor 3, and the heat storage brick 2 in the heat storage chamber is used to achieve uniform heating of the activator.

[0076] Combination Figure 7 and Figure 8 As shown, according to one embodiment of the present invention, three activator injection devices are arranged in the heat storage chamber at equal intervals. Of course, according to the concept of the present invention, the number and position of the activator injection devices are not limited, and can be determined according to factors such as the size of the heat storage chamber.

[0077] According to one embodiment of the present invention, the outer wall of the heat storage chamber of the present invention is provided with a heat insulating material 4. Such a configuration can improve safety on the one hand, and on the other hand, can prevent the heat in the heat storage chamber from dissipating through the outer wall of the heat storage chamber, which is conducive to ensuring the heating effect of the activator. According to one embodiment of the present invention, the heat storage chamber of the present invention is also provided with an inspection manhole 5, and the inspection manhole 5 is lined with a heat insulating material.

[0078] In the present invention, the activator injection device is controlled by a DCS control unit. Specifically, a regulating valve is provided at the activator inlet 11 of the injection pipe 1, and the DCS control system interlocks the regulating valve with the furnace pressure of the furnace body. The injection amount of the activator is interlocked with the furnace pressure of the cooling half furnace, and the furnace pressure of the cooling half furnace is set, and the injection amount of the activator is automatically adjusted by the DCS, so as to realize intelligent control of the activator dosage.

[0079] Combination Figure 3 , Figure 7 and Figure 8 As shown, in this embodiment, the heat storage bricks 2 in the heat storage chamber can be high-alumina refractory bricks or clay refractory bricks. Laying grid-shaped refractory bricks inside the heat storage chamber can increase the heat exchange capacity of the activator, that is, the heat exchange efficiency, stabilize the temperature of the activator, and react more fully with the carbonized material. At the same time, it is also beneficial to lower the temperature of the flue gas from the upper flue 14.

[0080] The process flow of producing activated carbon using the activated carbon production device of the present invention is as follows:

[0081] After the raw materials are screened, those that meet the particle size requirements enter the feeding bin trolley 18 through the feeding device, and the feeding bin trolley 18 moves to the feed port E to feed the activated carbon production device furnace body. After the materials enter the furnace body, they need to pass through the preheating section A to slowly heat the raw materials and reserve enough materials. After that, they are supplemented in the carbonization section B through the special-shaped bricks heated by high-temperature flue gas to radiate heat to the raw materials and continue to supplement carbonization. After that, they enter the activation section C, and the activator and the raw materials directly react chemically in the activation channel. After the activation is completed, they are cooled to a certain temperature in the cooling section D and then sent to the packaging process through the conveying device. The activator enters the activator injection device from the bottom of the regenerator F and is sprayed toward the bottom of the regenerator. After deflection and diffusion, it passes upward through the distributor and the grid-shaped refractory bricks inside the regenerator F (1000-1050℃) for heat exchange and enters the cooling half furnace. After heat exchange, it enters the supplementary carbonization section B through the upper flue 14 to the activation section C, and then passes through the combustion chamber and enters the heating half furnace. By adding air to each point in the heating half furnace, the flue gas temperature is increased, and it passes through the activation section C and the supplementary carbonization section B into the upper flue 14. After completing the heat exchange from the top to the bottom of the regenerator F, it is sent to the waste heat boiler from the exhaust gas outlet by the exhaust fan for incineration. After incineration, the flue gas is purified by the bag filter and the desulfurization and denitrification device and discharged through the chimney in a qualified manner. The cold furnace and the hot furnace are switched regularly to complete the heating of the activator and the heat supplement of the regenerator F.

[0082] Specifically, the above-mentioned raw materials include carbonized materials, raw coal, wood or carbonized or uncarbonized carbon-containing materials. The raw materials can be screened by vibrating linear screens, drum screens and other screening tools with the function of sorting different particle sizes. The feeding and discharging devices include conveying devices with conveying capacity such as belt conveyors, bucket elevators, and scraper conveyors. A switch mechanism and rollers are provided under the bunker of the feeding silo, and the various material channels of the activated carbon production device are fed by movement. According to one embodiment of the present invention, there is a water seal groove or material seal on the top of the activated carbon production device to stabilize the system pressure and prevent the overflow of toxic and harmful gases.

[0083] In the present invention, the reaction temperature of the activation section C is 900-980°C, the activator and the raw material directly react chemically, the activator reacts most intensely with the raw material in this temperature range, and the activation effect is best. In the present invention, the pressure of the activator is 0.4-0.6MPa, and the flow rate is 1500-2500kg / h.

[0084] In the present invention, the air flow rate of the air injection device is 1000-1500m 3 / h, wind pressure 2000-3000Pa. The furnace pressure of the heating half furnace is 40-100Pa, and the furnace pressure of the cooling half furnace is 60-120Pa.

[0085] The activated carbon production device of the present invention breaks the limitations of the existing SLEP furnace in producing activated carbon through the improvement of the above structure. Specifically, the 14-24mm product channel of the general activated carbon furnace is suitable for producing briquette carbon, raw coal crushed carbon and small particle carbon with a particle size less than 4mm, and the activated carbon production device of the present invention has strong compatibility. The above-mentioned activated carbon of various specifications with a particle size less than or equal to 10mm can be produced by the activated carbon production device of the present invention.

[0086] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An activated carbon production device comprising an air injection device, characterized in that: The invention comprises two half furnaces, each half furnace comprises a furnace body, a regenerator, an upper flue connecting the furnace body and the regenerator, and a lower flue connected to the combustion chamber of the furnace body, wherein the air injection device is respectively arranged in the supplementary carbonization section and / or the activation section; The air injection device comprises an air injection pipe (61) and an air mixer (62) connected to the air injection pipe (61); an air outlet is provided at the end of the air injection pipe (61); and an air baffle (63) is provided in front of the air outlet in a direction from the air injection pipe (61) to the air mixer (62); The inner diameter of the air mixer (62) gradually increases in a direction away from the air injection pipe (61); The air baffle (63) can be configured as an arc-shaped baffle, a triangular baffle or a trapezoidal baffle.

2. The activated carbon production device according to claim 1, characterized in that: The air injection pipe (61) comprises a conveying part (611) and a pressurizing part (612) which are connected in sequence, and the air outlet is arranged at the end of the pressurizing part (612).

3. The activated carbon production device according to claim 2, characterized in that: The inner diameter of the pressurizing portion (612) gradually decreases in a direction away from the conveying portion (611).

4. The activated carbon production device according to claim 1 or 3, characterized in that: The air injection device further comprises an air duct (64) located after the air mixer (62) and connected to the air mixer (62), wherein the air duct (64) is provided with a plurality of air distribution ports (641).

5. The activated carbon production device according to claim 4, characterized in that: The plurality of air distribution ports (641) are symmetrically arranged about the air injection pipe (61).

6. The activated carbon production device according to claim 5, characterized in that: Extending along the location of the air injection pipe (61) toward both sides thereof, the diameters of the plurality of air distribution ports (641) gradually increase.

7. The activated carbon production device according to claim 1, characterized in that: The air injection device further includes a heat insulating material (65) disposed outside the air injection pipe (61) and the air mixer (62).

8. The activated carbon production device according to claim 1, characterized in that: The activated carbon production device further comprises a DCS control system, and a flow regulating valve is provided on the air injection pipe (61), and the DCS control system is used to control the flow regulating valve.

9. The activated carbon production device according to claim 1, characterized in that: The product channel width of the activation section is set to 15-80 mm.

10. The activated carbon production device according to claim 1, characterized in that: The cooling section is provided with a forced cooler, and the forced cooler comprises at least one of the following: a circulating water cooling channel and an air cooling channel.

11. The activated carbon production device according to claim 1, characterized in that: The ratio of the height of the supplementary carbonization section to the height of the activation section is 1:

5.

12. The activated carbon production device according to claim 1, characterized in that: The regenerator of the activated carbon production device also includes an activator injection device, which includes an injection pipe (1), the injection pipe (1) is provided with an activator inlet (11), and the injection pipe (1) is also provided with a catalyst inlet (12).

13. The activated carbon production device according to claim 12, characterized in that: The end of the injection pipe (1) opposite to the activator inlet (11) is closed, and a plurality of injection holes (13) are provided along the length direction of the injection pipe (1).

14. The activated carbon production device according to claim 13, characterized in that: In a direction away from the activator inlet (11), the gaps between the injection holes (13) gradually increase along the length direction.

15. The activated carbon production device according to claim 14, characterized in that: The injection pipe (1) extends into the heat storage chamber, the activator inlet (11) and the catalyst inlet (12) are located outside the heat storage chamber, and the injection hole (13) is located in the heat storage chamber and is arranged toward the bottom of the heat storage chamber.

16. The activated carbon production device according to claim 15, characterized in that: Heat storage bricks (2) are arranged inside the heat storage chamber and above the injection pipe (1), and a distributor (3) is arranged between the heat storage bricks (2) and the injection pipe (1).

17. The activated carbon production device according to claim 16, characterized in that: The heat storage bricks (2) are grid-shaped heat storage bricks built inside the heat storage chamber.

18. The activated carbon production device according to claim 16, characterized in that: The distributor (3) is an activator distribution column arranged above the injection pipe (1) and below the heat storage brick (2).

19. The activated carbon production device according to claim 18, characterized in that: The activator distribution bar is made of heat storage bricks.

20. The activated carbon production device according to claim 12, characterized in that: The outer wall of the heat storage chamber is provided with a heat insulating material (4).

21. The activated carbon production device according to claim 1, characterized in that: The reaction temperature of the activation stage is 900°C-980°C, the pressure of the activating agent is 0.4-0.6MPa, and the flow rate is 1500-2500kg / h.

22. The activated carbon production device according to claim 12, characterized in that: The air flow rate of the air injection device is 1000-1500m 3 / h, wind pressure 2000-3000Pa.

23. The activated carbon production device according to claim 21, wherein the activating agent is water vapor or flue gas or a mixture of water vapor and flue gas.

Images