Spiral solid-gas seal feeding system for rotary kiln

Abstract

The invention belongs to the technical field of rotary kiln sealing devices, and discloses a spiral solid-gas sealing feeding system for a rotary kiln. Comprising a feeding block, a plurality of first material taking hoppers are arranged on the outer wall of the feeding block at equal intervals, and the first material taking hoppers communicate with an inner cavity of a rotary kiln body through first feeding channels arranged in the feeding block; the outer wall of the rotary kiln body is sleeved with the feeding ring, a plurality of second material taking hoppers are arranged on the outer wall of the feeding ring at equal intervals, and the second material taking hoppers communicate with an inner cavity of the rotary kiln body through second feeding channels formed in the feeding ring; the discharging block is arranged at the end of the rotary kiln body and communicates with the outside. And the airtight ring forms a sealing air curtain in the first feeding channel and the second feeding channel. The rotary kiln is compact in structure, convenient to use and high in material conveying efficiency, improves the sealing performance, reduces the air leakage coefficient, adapts to severe working conditions, is convenient to maintain and overhaul, facilitates efficient, safe and stable operation of the rotary kiln, improves the quality and yield of products, and reduces energy consumption and cost.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln sealing devices, in particular to a spiral solid-gas sealing feeding system for a rotary kiln. Background Art

[0002] As a key thermal equipment, the rotary kiln is widely used in many industrial production fields, including building materials, metallurgy, chemicals, and environmental protection, thanks to its significant advantages, including wide raw material adaptability, high reaction intensity, simple equipment structure, and easy operation and maintenance. As a core equipment in many industrial production processes, the sealing performance of the rotary kiln is directly related to whether the production process can meet environmental protection requirements. For example, in a solid waste pyrolysis rotary kiln, if the sealing performance is poor, harmful gases such as dioxins and furans produced by pyrolysis may leak into the atmosphere, seriously polluting the environment. At the same time, the intrusion of outside air may also interfere with the normal progress of the pyrolysis reaction, reduce the quality of the pyrolysis products, and increase energy consumption. This makes the sealing of the inlet and outlet of the rotary kiln a very challenging problem.

[0003] In current industrial practice, commonly used rotary kiln sealing methods include fish scale seals, packing seals, labyrinth seals, etc. However, these traditional sealing technologies have exposed many disadvantages in actual application scenarios. In the fish scale sealing method, when the kiln cylinder is bent and deformed, and a large deflection occurs during operation, the fish scale sealing piece is often difficult to meet the required compensation amount, which in turn leads to serious air leakage and material leakage. In the packing sealing method, both axial packing seals and radial packing seals have obvious defects; although the radial packing arrangement has overcome the problem of tight packing at the top and loose packing at the bottom caused by gravity in the vertical axial seal to a certain extent, its sealing surface is small due to size limitations; and in the long-term operation process, the packing needs to absorb the expansion and stringing of the cylinder, which can easily form a short-circuit channel on the sealing surface, resulting in a significant decrease in the actual sealing performance. However, due to the manufacturing errors, stiffness issues and bending of the cylinder axis of the labyrinth sealing method, the gap between adjacent labyrinth rings cannot be set too small. Otherwise, it is easy to cause wear between the rotating labyrinth rings and the cylinder, resulting in eccentric wear and biting. A larger gap will reduce the sealing effect, which greatly limits the application of this sealing method.

[0004] Therefore, it is urgent to develop a rotary kiln sealing technology that is efficient, reliable and adaptable to complex working conditions. This is not only the key to promoting the advancement of industrial production technology, but also an inevitable requirement for achieving green and sustainable development. Summary of the Invention

[0005] The purpose of the present invention is to provide a spiral solid-gas sealed feeding system for a rotary kiln to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a spiral solid-gas sealed feeding system for a rotary kiln, comprising:

[0007] A feed block, the feed block being arranged at the feed end of the rotary kiln body, a plurality of first hoppers being arranged at equal intervals on the outer wall of the feed block, the first hoppers being connected to the inner cavity of the rotary kiln body through a first feed channel arranged in the feed block;

[0008] A feed ring, the feed ring is sleeved on the outer wall of the rotary kiln body, and a plurality of second hoppers are arranged on the outer wall of the feed ring at equal intervals, and the second hoppers are connected to the inner cavity of the rotary kiln body through a second feed channel arranged in the feed ring;

[0009] a discharge block, the discharge block being arranged at the end of the rotary kiln body and corresponding to the feed block, and the rotary kiln body being connected to the outside world through the discharge block;

[0010] An airtight ring is provided in the first feed channel and the second feed channel, and the airtight ring is connected to high-pressure gas to form a sealed air curtain.

[0011] Preferably, the airtight ring includes a ring body embedded in the first feed channel and the second feed channel, and a plurality of jet holes are axially evenly spaced through the ring body. Air curtain nozzles are embedded in the jet holes, and external high-pressure gas is ejected through the plurality of air curtain nozzles to form a sealed air curtain.

[0012] Preferably, an outer wall cover of the ring body is provided with an air distribution ring, and an air distribution cavity connected to an external high-pressure air source is provided in the air distribution ring, and the high-pressure gas entering the air distribution cavity is ejected through the plurality of air injection holes.

[0013] Preferably, a plurality of return air channels for recovering high-pressure gas are provided through the ring body, the return air channels are staggered with the jet holes, a one-way valve is provided in the return air channels, and the high-pressure gas in the first feed channel and the second feed channel is recovered through the return air channels.

[0014] Preferably, the one-way valve includes a fixed block sealed and fixed in the return air channel, a sliding block is elastically connected to the fixed block, and the sliding block is sealingly and slidingly connected to the return air channel; a return air pipe is slidably connected in the sliding block, and the return air pipe passes through the fixed block and is fixed to the fixed block.

[0015] Preferably, a plurality of air return holes are formed through the air return pipe, and the air return holes are blocked by the sliding block; when the pressure rises and air return is required, the sliding block slides toward the fixed block to expose the air return holes.

[0016] Preferably, a feed port corresponding to the outlets of the first feed channel and the second feed channel is formed through the rotary kiln body, a clearance groove is formed at one end of the feed port facing the rotary kiln body, and a blocking door is provided in the clearance groove.

[0017] Preferably, a discharge hopper is provided on the outer wall of the discharge block, and the discharge hopper is connected to the inner cavity of the rotary kiln body through a discharge channel provided in the discharge block, and the rotation direction of the discharge channel is the same as that of the first feed channel and the second feed channel.

[0018] Preferably, a plurality of support rings are rotatably sleeved on the rotary kiln body, and a plurality of support feet are provided at the bottom ends of the support rings, and the support feet are fixed on the ground.

[0019] Preferably, a storage hopper is provided at the bottom end of the rotary kiln body, and a plurality of storage troughs are provided in the storage hopper, and the storage troughs are respectively provided corresponding to the first hopper and the second hopper.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention discloses a spiral solid-gas sealed feeding system for a rotary kiln, which mainly includes key components such as a feed block, a feed ring, a discharge block and an airtight ring. The feed block and the feed ring are respectively arranged at the feed end and the outer wall of the rotary kiln body, and are used to transport materials to the inner cavity of the rotary kiln. The discharge block is arranged at the end of the rotary kiln body to realize the discharge of materials. The airtight ring is arranged in the feed channel, and a sealed air curtain is formed by passing high-pressure gas to achieve a sealing effect. There are no contact parts, which avoids wear and tear, reduces material costs and maintenance difficulty, and is suitable for high-temperature and dusty environments; the pressure of the sealed air curtain can be adjusted in real time according to the working conditions in the kiln, and reducing air leakage can reduce heat loss, improve energy utilization, and adapt to the complex working environment of the rotary kiln; the sealed air curtain formed by the high-pressure gas ejected by the airtight ring in the first feed channel and the second feed channel will not block the entry and exit of materials, which not only avoids the friction and wear problems of contact sealing, but also significantly improves the sealing effect and reduces the air leakage coefficient; the first feed channel and the second feed channel are both spirally arranged , so that external materials can enter the rotary kiln body without backflow; and the first hopper and the second hopper are connected with the first feeding channel and the second feeding channel respectively. When the rotary kiln body is rotating normally, different materials can be dug out respectively through the first hopper and the second hopper, and enter the rotary kiln body along the spiral first feeding channel and the second feeding channel under the action of gravity. The backflow of the target gas generated is avoided by the airtight ring, and the normal sealing of the sealing component is realized, so that the material can enter the inner cavity of the rotary kiln evenly and continuously, thereby improving the efficiency of material transportation. At the same time, the setting of the discharge block also ensures the smooth discharge of the material, avoiding problems such as blockage.

[0021] The invention has a compact structure, is easy to use, has high material conveying efficiency, improves sealing performance, reduces air leakage coefficient, adapts to adverse working conditions, is convenient for maintenance and overhaul, helps to ensure efficient, safe and stable operation of the rotary kiln, improves product quality and yield, and reduces energy consumption and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of this application. The embodiments and descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0023] Figure 1 This is an axial view of the spiral solid-gas seal feeding system for the rotary kiln of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the second hopper of the present invention;

[0025] Figure 3 Schematic cross-section of the feed ring of the present invention;

[0026] Figure 4 For the present invention Figure 3 A partial enlarged view of middle A;

[0027] Figure 5 Schematic diagram of the structure of the airtight ring of the present invention;

[0028] Figure 6 For the present invention Figure 5 A partial enlarged view of middle B;

[0029] Figure 7 This is a schematic diagram of the one-way valve structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the feed block structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the discharge block of the present invention;

[0032] Figure 10 This is a schematic diagram of the inlet position of the discharge channel of the present invention;

[0033] In the figure: 1, rotary kiln body; 2, feed block; 3, feed ring; 4, discharge block; 5, airtight ring; 11, feed port; 12, clearance slot; 13, blocking door; 14, support ring; 15, support foot; 16, storage hopper; 17, storage trough; 21, first hopper; 22, first feed channel; 31, second hopper; 32, second feed channel; 41, discharge hopper; 42, discharge Material channel; 51, ring body; 52, air jet hole; 53, air curtain nozzle; 54, sealing air curtain; 55, air distribution ring; 56, air distribution cavity; 57, return air channel; 58, one-way valve; 59, fixed block; 510, sliding block; 511, guide hole; 512, guide rod; 513, limit head; 514, limit groove; 515, reset spring; 516, return air pipe; 517, return air hole. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In existing pyrolysis and retorting processes, the application of sealing technology plays a decisive role in the safety, economy and product quality of the entire production process, which is specifically reflected in the following key aspects:

[0036] Preventing material leakage and improving raw material utilization: Pyrolysis and retorting processes involve the decomposition and conversion of various organic raw materials under high temperatures and oxygen-deficient or oxygen-limited conditions. Poor system sealing can lead to raw material leakage, resulting in material loss and increased production costs. For example, in the production of biochar and bio-oil through biomass pyrolysis, leaked biomass cannot fully react, reducing the output of biochar and bio-oil. A well-designed sealing design ensures that raw materials fully participate in the reaction, reducing unnecessary losses, improving raw material utilization, and ultimately boosting production efficiency.

[0037] Ensuring product quality and preventing impurities: The target products generated by pyrolysis and dry distillation typically have specific chemical compositions and physical properties. If outside air or other impurities enter the reaction system through weak seals, they can react with the pyrolysis or dry distillation products. For example, in the production of coke through coal dry distillation, air intrusion can cause oxidation of the coke, reducing its fixed carbon content and strength, and affecting its quality. Strict sealing measures can isolate external interference, maintain the purity of the reaction environment, ensure the quality and consistency of the target products, and enhance product market competitiveness.

[0038] Reduce safety risks and ensure stable production: Pyrolysis and distillation processes are often accompanied by the generation of flammable and explosive gases, such as hydrogen and methane. If the system seal fails, the leaked flammable gas mixes with air to form an explosive mixture. Upon contact with a fire source, it can easily cause an explosion, seriously threatening public safety and equipment safety. Furthermore, the ingress of air can cause the oxygen concentration in the reaction system to increase, triggering violent combustion or even explosion. Reliable sealing technology can effectively prevent the leakage of flammable gases and the intrusion of air, maintaining stable pressure and gas composition in the reaction system, reducing safety risks such as fire and explosion, and ensuring the continuity and stability of the production process.

[0039] Reduce environmental pollution and practice green production: Unsealed systems during pyrolysis and retorting can release harmful gases, such as volatile organic compounds (VOCs) and hydrogen sulfide, into the atmosphere, causing air pollution and harming the surrounding ecosystem and residents' health. By optimizing the sealing structure and using high-performance sealing materials, we can effectively control the fugitive emission of harmful gases, reduce environmental pollution, comply with environmental regulations, help companies achieve green and sustainable development, and enhance their social image and sense of environmental responsibility.

[0040] In summary, sealing technology is a key element in ensuring production safety, improving product quality, reducing costs, and minimizing environmental pollution during pyrolysis and retorting. Innovation and optimization of sealing technology will bring significant technological advancements and economic benefits to pyrolysis and retorting processes, making it highly valuable for patent applications.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figure 1 - Figure 10 As shown, this embodiment provides a spiral solid-gas sealed feeding system for a rotary kiln, comprising:

[0043] The feed block 2 is arranged at the feed end of the rotary kiln body 1. A plurality of first hoppers 21 are arranged at equal intervals on the outer wall of the feed block 2. The first hoppers 21 are connected to the inner cavity of the rotary kiln body 1 through a first feed channel 22 arranged in the feed block 2;

[0044] The feed ring 3 is sleeved on the outer wall of the rotary kiln body 1. A plurality of second hoppers 31 are evenly spaced on the outer wall of the feed ring 3. The second hoppers 31 are connected to the inner cavity of the rotary kiln body 1 through second feed channels 32 provided in the feed ring 3.

[0045] The discharge block 4 is arranged at the end of the rotary kiln body 1 and is arranged corresponding to the feed block 2. The rotary kiln body 1 is connected to the outside through the discharge block 4;

[0046] The airtight ring 5 is arranged in the first feed channel 22 and the second feed channel 32 . The airtight ring 5 is connected to the high-pressure gas and forms a sealed air curtain 54 .

[0047] The present invention discloses a spiral solid-gas sealed feeding system for a rotary kiln. The system mainly comprises a feed block 2, a feed ring 3, a discharge block 4, and an airtight ring 5. The feed block 2 and feed ring 3 are respectively arranged at the feed end and outer wall of the rotary kiln body 1 to convey materials into the inner cavity of the rotary kiln body 1. The discharge block 4 is arranged at the end of the rotary kiln body 1 to discharge materials. The airtight ring 5 is arranged in the feed channel, and a sealing air curtain 54 is formed by introducing high-pressure gas to achieve a sealing effect. There are no contact parts, which avoids wear and tear, reduces material costs and maintenance difficulty, and is suitable for high-temperature and dusty environments. The pressure of the sealing air curtain 54 can be adjusted in real time according to the working conditions in the kiln. Reducing air leakage can reduce heat loss, improve energy utilization, and adapt to the complex working environment of the rotary kiln. The sealing air curtain 54 formed by the high-pressure gas ejected by the airtight ring 5 in the first feed channel 22 and the second feed channel 32 will not block the entry and exit of materials, which not only avoids the friction and wear problems of contact sealing, but also significantly improves the sealing effect and reduces the air leakage coefficient. The first feed channel 22 and the second feed channel 32 are both spirally arranged, so that external objects The material enters the rotary kiln body 1 without backflow, ensuring continuous production; and the first hopper 21 and the second hopper 31 are connected to the first feed channel 22 and the second feed channel 32 respectively. When the rotary kiln body 1 is rotating normally, different materials can be dug out respectively through the first hopper 21 and the second hopper 31, and enter the rotary kiln body 1 along the spiral first feed channel 22 and the second feed channel 32 under the action of gravity. The target gas generated is prevented from flowing back through the airtight ring 5, and the normal sealing of the sealing component is achieved, so that the material can enter the rotary kiln cavity evenly and continuously, improving the efficiency of material transportation. At the same time, the setting of the discharge block 4 also ensures the smooth discharge of the material, avoiding problems such as blockage. The present invention has a compact structure, is easy to use, has high material transportation efficiency, improves sealing performance, reduces air leakage coefficient, adapts to harsh working conditions, is convenient for maintenance and overhaul, and helps to ensure the efficient, safe and stable operation of the rotary kiln, improves the quality and yield of the product, and reduces energy consumption and cost.

[0048] In one embodiment of the present invention, the number of the first hopper 21 and the second hopper 31 is set to be no less than two, and they are arranged at equal axial intervals; the opening direction of the first hopper 21 and the second hopper 31 is the same as the rotation direction of the rotary kiln body 1, which is convenient for digging materials and realizing continuous production.

[0049] In one embodiment of the present invention, the number of the feed ring 3 is set to one, and the feed ring 3 is arranged on a side of the rotary kiln body 1 close to the feed block 2 .

[0050] In a further optimized solution, the airtight ring 5 includes a ring body 51 embedded in the first feed channel 22 and the second feed channel 32. A plurality of air jet holes 52 are axially and evenly spaced through the ring body 51. Air curtain nozzles 53 are embedded in the air jet holes 52. External high-pressure gas is ejected through the plurality of air curtain nozzles 53 to form a sealed air curtain 54. A ring body 51 is provided at each of the ports where the first feed channel 22 and the second feed channel 32 connect to the rotary kiln body 1. Air jet holes 52 are circumferentially arranged on the ring body 51. External high-pressure gas is ejected through the air curtain nozzles 53 in the air jet holes 52, forming a stable sealed air curtain 54 in the inner cavity of the ring body 51, isolating gaseous substances on both sides, enhancing the airtightness of the system, preventing leakage of the high-temperature catalytic target gas in the rotary kiln body 1, and avoiding wear of mechanical seal parts, thereby facilitating maintenance. Added solid materials can smoothly pass through the sealed air curtain 54, eliminating the need for frequent on-off operations and facilitating automated material addition.

[0051] In one embodiment of the present invention, referring to the attached Figure 6 As shown, the through hole of the air curtain nozzle 53 is thin in the middle, which increases the speed and pressure of the gas and facilitates the integration of the shape of the ejected high-pressure gas to form the required sealed air curtain 54. Its working principle refers to the Venturi tube and will not be repeated here.

[0052] As a further optimization, an air distribution ring 55 is provided on the outer wall of the ring body 51. Within the air distribution ring 55 is an air distribution cavity 56 connected to an external high-pressure air source. High-pressure gas entering the air distribution cavity 56 is ejected through a plurality of air jet holes 52. The air distribution ring 55 is provided on the outer wall of the ring body 51. High-pressure gas is uniformly pressurized and distributed through the air distribution cavity 56 before entering the air jet holes 52. This achieves uniform distribution and supply of high-pressure gas, further improving the stability and sealing effect of the sealed air curtain 54.

[0053] To further optimize the solution, the ring body 51 is provided with a plurality of return air channels 57 for recovering high-pressure gas. The return air channels 57 are arranged in a staggered arrangement with the air injection holes 52. A one-way valve 58 is provided in the return air channels 57. The high-pressure gas in the first feed channel 22 and the second feed channel 32 is recovered through the return air channels 57. The return air channels 57 provided on the ring body 51, which are staggered with the air injection holes 52, are used to recover excess high-pressure gas. Recovering excess gas reduces gas source energy consumption, maintains the dynamic balance of the pressure of the sealing air curtain 54, and prevents excessive pressure from affecting material transportation. The one-way valve 58 in the return air channel 57 opens in one direction toward the side of the airtight ring 5. The valve opening pressure is higher than the sealing pressure. When the air pressure in the channel is too high, the one-way valve 58 opens to discharge excess gas and balance the pressure. The discharged gas can be recovered and reused, reducing waste.

[0054] To further optimize the solution, the one-way valve 58 includes a fixed block 59 that is sealed and fixed in the return air channel 57, and a sliding block 510 is elastically connected to the fixed block 59, and the sliding block 510 is sealed and slidingly connected to the return air channel 57; a return air pipe 516 is slidably connected in the sliding block 510, and the return air pipe 516 passes through the fixed block 59 and is fixed to the fixed block 59. The fixed block 59 is fixed in the return air channel 57 and serves as a fixed base for the one-way valve 58, while the sliding block 510 slides in a sealed manner in the return air channel 57. A return spring 515 is provided between the sliding block 510 and the fixed block 59. The return spring 515 is in a compressed state, and its elastic force is the valve-opening pressure of the one-way valve 58; when the pressure in the ring body 51 is higher than the elastic force of the return spring 515, the pressure acting on the sliding block 510 pushes the sliding block 510 to slide toward the fixed block 59, so that the return air pipe 516 is exposed from the sliding block 510 and connected with the inner cavity of the ring body 51, facilitating the discharge of gas from the ring body 51. After the discharge, the pressure in the ring body 51 is reduced and the sliding block 510 is reset under the push of the return spring 515, sealing the return air channel 57 again, thereby achieving dynamic balance of the gas pressure in the ring body 51.

[0055] To further optimize the solution, a plurality of return holes 517 are opened through the return air pipe 516, and the return air holes 517 are blocked by the sliding block 510; when the pressure increases and air needs to be returned, the sliding block 510 slides toward the fixed block 59 to expose the return air holes 517. The end of the return air pipe 516 is sealed. When the one-way valve 58 is in a free state, the end of the return air pipe 516 is flush with the force-bearing surface of the sliding block 510; and a number of return air holes 517 are arranged at equal intervals on the return air pipe 516. When the sliding block 510 is forced to slide toward the fixed block 59, the return air holes 517 are exposed from the sliding block 510, thereby realizing the connection between the inside and outside of the ring body 51 and recovering excess high-pressure gas; the higher the pressure in the ring body 51, the greater the sliding distance of the sliding block 510, the more exposed return air holes 517, and the faster the exhaust speed. As the pressure decreases, the sliding block 510 resets, reducing the number of exposed return air holes 517, reducing the exhaust speed, achieving a dynamic balance of the return air speed, and maintaining the sealing pressure of the airtight ring 5.

[0056] In one embodiment of the present invention, a guide hole 511 is formed through the sliding block 510 , and a guide rod 512 fixed to the fixed block 59 is slidably connected in the guide hole 511 to limit and guide the sliding block 510 .

[0057] In one embodiment of the present invention, the end of the guide rod 512 away from the fixed block 59 is fixedly connected to the limit head 513, and the end of the sliding block 510 away from the fixed block 59 is provided with a limit groove 514 corresponding to the limit head 513, which is used to limit the sliding position of the sliding block 510.

[0058] In one embodiment of the present invention, the return air channel 57 is located on the side of the ring body 51 away from the rotary kiln body 1, so that during the return air process, the recovered gas is isolated by the sealed air curtain 54, thereby preventing the loss of gas generated in the rotary kiln body 1.

[0059] A further optimized solution is provided on the rotary kiln body 1, with a feed port 11 corresponding to the outlets of the first feed channel 22 and the second feed channel 32. A clearance groove 12 is provided on one end of the feed port 11 facing the rotary kiln body 1, and a blocking door 13 is flipped inside the clearance groove 12. The first feed channel 22 and the second feed channel 32 enter through the feed port 11 provided on the rotary kiln body 1, and the clearance groove 12 is coaxially arranged with the feed port 11. The blocking door 13 is flipped in the clearance groove 12 by a torsion spring, and its opening direction faces the inside of the rotary kiln body 1. The blocking door 13 is pushed open when the material passes through, and automatically closes when the feeding stops, preventing the backflow of hot air or dust in the kiln, ensuring that the material can accurately enter the inner cavity of the rotary kiln, and improving the accuracy of the feeding; at the same time, the blocking door 13 effectively prevents the material from leaking when the rotary kiln body 1 rotates, thereby improving the sealing performance of the system.

[0060] In one embodiment of the present invention, the feed port 11 is designed to be elliptical, so as to be easily connected to the first feed channel 22 and the second feed channel 32 and facilitate the passage of materials.

[0061] A further optimization scheme features a discharge hopper 41 on the outer wall of the discharge block 4. This hopper 41 communicates with the inner cavity of the rotary kiln body 1 via a discharge channel 42 disposed within the discharge block 4. The discharge channel 42 has the same rotational direction as the first and second feed channels 22 and 32. The discharge hopper 41 is located on the outer wall of the discharge block 4, and the spiral discharge channel 42 disposed therein has the same spiral direction as the first feed channel 22. This allows the reacted material to be discharged from the discharge channel 42 without the need to flip the rotary kiln body 1. This ensures continuous production within the rotary kiln body 1, reduces material blockage during the discharge process, improves material transportation efficiency, and prevents material residue.

[0062] In one embodiment of the present invention, in order to reduce material discharge residue, the material discharge position of the rotary kiln body 1 is close to the inner wall of the rotary kiln body 1 .

[0063] In one embodiment of the present invention, referring to the attached Figure 10 As shown, the opening position of the discharge channel 42 is at a certain distance from the axis and the inner wall of the rotary kiln body 1. When the rotary kiln body 1 rotates, only when the height of the waste material after the reaction reaches the inlet of the discharge channel 42, the waste material after the reaction enters the discharge channel 42 and is discharged, thereby realizing continuous reaction.

[0064] In a further optimization scheme, several support rings 14 are rotatably mounted on the rotary kiln body 1. Several support legs 15 are located at the bottom ends of the support rings 14 and are fixed to the ground. The support components consisting of the support legs 15 and support rings 14 are primarily used to support and secure the rotary kiln body 1, ensuring its stability and support, and improving the safety and reliability of the system.

[0065] To further optimize the solution, a storage hopper 16 is provided at the bottom of the rotary kiln body 1. Within this hopper 16 are several storage troughs 17, which correspond to the first and second hoppers 21, 31. The storage hopper 16 is an arc-shaped structure, its center concentric with the rotary kiln body 1. The storage troughs 17 correspond to the first and second hoppers 21, 31. Material to be added falls into the storage troughs 17. As the rotary kiln body 1 rotates, the first and second hoppers 21, 31 extract material from the storage troughs 17, enabling automated material addition.

[0066] In one embodiment of the present invention, the sidewalls of the storage trough 17 are inclined to facilitate the gathering of materials into the storage trough 17 .

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A spiral solid-gas sealed feeding system for a rotary kiln, characterized in that: include: A feed block (2), the feed block (2) being arranged at the feed end of the rotary kiln body (1), a plurality of first hoppers (21) being arranged at equal intervals on the outer wall of the feed block (2), the first hoppers (21) being connected to the inner cavity of the rotary kiln body (1) via a first feed channel (22) arranged in the feed block (2); A feed ring (3), the feed ring (3) being sleeved on the outer wall of the rotary kiln body (1), a plurality of second hoppers (31) being arranged at equal intervals on the outer wall of the feed ring (3), the second hoppers (31) being communicated with the inner cavity of the rotary kiln body (1) via a second feed channel (32) arranged in the feed ring (3); a discharge block (4), the discharge block (4) being arranged at the end of the rotary kiln body (1) and corresponding to the feed block (2), the rotary kiln body (1) being in communication with the outside world via the discharge block (4); An airtight ring (5) is provided in the first feed channel (22) and the second feed channel (32), and the airtight ring (5) is connected to high-pressure gas to form a sealed air curtain (54).

2. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 1, characterized in that: The airtight ring (5) includes a ring body (51) embedded in the first feed channel (22) and the second feed channel (32), and a plurality of air jet holes (52) are axially and evenly spaced through the ring body (51). Air curtain nozzles (53) are embedded in the air jet holes (52), and high-pressure gas from the outside is ejected through the plurality of air curtain nozzles (53) to form a sealed air curtain (54).

3. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 2, characterized in that: An air distribution ring (55) is provided on the outer wall of the ring body (51), and an air distribution cavity (56) connected to an external high-pressure air source is provided in the air distribution ring (55). The high-pressure gas entering the air distribution cavity (56) is ejected through the plurality of air injection holes (52).

4. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 2, characterized in that: A plurality of return air channels (57) for recovering high-pressure gas are provided through the ring body (51). The return air channels (57) are staggered with the gas injection holes (52). A one-way valve (58) is provided in the return air channels (57). The high-pressure gas in the first feed channel (22) and the second feed channel (32) is recovered through the return air channels (57).

5. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 4, characterized in that: The one-way valve (58) includes a fixed block (59) sealed and fixed in the return air channel (57); a sliding block (510) is elastically connected to the fixed block (59); the sliding block (510) is in sealed sliding connection with the return air channel (57); a return air pipe (516) is slidably connected in the sliding block (510); the return air pipe (516) passes through the fixed block (59) and is fixed to the fixed block (59).

6. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 5, characterized in that: The air return pipe (516) is provided with a plurality of air return holes (517), and the air return holes (517) are blocked by the sliding block (510); When the pressure rises and air return is required, the sliding block (510) slides toward the fixed block (59) to expose the air return hole (517).

7. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 1, characterized in that: A feed port (11) is provided through the rotary kiln body (1) and is arranged corresponding to the outlets of the first feed channel (22) and the second feed channel (32). A clearance groove (12) is provided at one end of the feed port (11) facing the rotary kiln body (1). A blocking door (13) is provided in the clearance groove (12).

8. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 1, characterized in that: The outer wall of the discharge block (4) is provided with a discharge hopper (41), and the discharge hopper (41) is connected to the inner cavity of the rotary kiln body (1) through a discharge channel (42) provided in the discharge block (4), and the rotation direction of the discharge channel (42) is the same as the rotation direction of the first feed channel (22) and the second feed channel (32).

9. The spiral airtight sealing feeding system for a rotary kiln according to claim 1, characterized in that: A plurality of support rings (14) are rotatably sleeved on a rotary kiln body (1), and a plurality of support legs (15) are provided at the bottom ends of the support rings (14), and the support legs (15) are fixed on the ground.

10. The spiral solid-gas sealed feeding system for a rotary kiln according to claim 1, characterized in that: The bottom end of the rotary kiln body (1) is equipped with a storage hopper (16), and a plurality of storage troughs (17) are provided in the storage hopper (16). The storage troughs (17) are respectively arranged corresponding to the first hopper (21) and the second hopper (31).

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