Kiln coating hanging equipment for hazardous waste rotary kiln

Abstract

The utility model discloses kiln coating hanging equipment for a hazardous waste rotary kiln, and belongs to the technical field of hazardous waste treatment. Comprising a rotary kiln body, a conveying unit connected with a feeding port of the rotary kiln body, a burner arranged at the tail of the rotary kiln body and a temperature control unit used for controlling the temperature of a kiln coating. The temperature in the kiln is monitored in real time through the online infrared thermal imager, the interior and the exterior of the kiln are cooled in an internal and external collaborative cooling mode, the cooling efficiency is remarkably improved, the kiln body is prevented from being damaged due to high temperature, and accurate control over the temperature in the kiln is achieved; by optimizing the design of the material conveying unit, the temperature control unit and the air duct system, the defects of existing kiln coating equipment in the aspects of refractory material feeding, temperature control and cooling efficiency are overcome, the kiln coating equipment has the advantages of being uniform in feeding, accurate in temperature control, efficient in cooling, reliable in operation, convenient to maintain and the like, the operation efficiency of the hazardous waste rotary kiln is remarkably improved, and the service life of the hazardous waste rotary kiln is remarkably prolonged. And the operation cost is reduced, and wide application prospects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of hazardous waste treatment technology, specifically to a kiln lining device for a hazardous waste rotary kiln. Background Technology

[0002] Hazardous waste treatment is an important issue in the field of environmental protection. Rotary kilns, as a highly efficient hazardous waste treatment device, are widely used in hazardous waste incineration, pyrolysis, and resource utilization. During the operation of a rotary kiln, the inner wall of the kiln needs to be coated with a layer of refractory material to protect the kiln body from damage caused by high temperatures and chemical corrosion.

[0003] Kiln lining refers to the process of forming a protective layer of refractory material on the inner wall of a rotary kiln. This lining protects the kiln body from damage caused by high temperatures, chemical corrosion, and mechanical wear, extending the kiln's service life and improving its operating efficiency and safety. This necessitates the use of kiln lining equipment.

[0004] However, existing kiln coating equipment has the following problems:

[0005] First, uneven temperature distribution inside the kiln, with localized overheating or undercooling, can affect the quality of the kiln lining and may even cause it to crack or peel off.

[0006] Secondly, the cooling method is singular and cannot achieve coordinated internal and external cooling, resulting in low cooling efficiency and easy damage to the kiln body due to high temperature. Utility Model Content

[0007] To address the aforementioned problems, this utility model discloses a kiln lining device for a hazardous waste rotary kiln.

[0008] The technical solution of this utility model is: a kiln lining device for a hazardous waste rotary kiln, comprising a rotary kiln body, a conveying unit connected to the feed inlet of the rotary kiln body, a burner located at the tail of the rotary kiln body, and a temperature control unit for controlling the kiln lining temperature.

[0009] The temperature control unit includes a hollow snap-fit ​​ring located at the feed inlet of the rotary kiln body and connected to the conveying unit; an exhaust fan that is connected to the inside of the hollow snap-fit ​​ring through a first air duct and has an electromagnetic valve at the connection point; an online infrared thermal imager located on the outer wall of the rotary kiln body; two mounting outer rings sleeved on both sides of the outside of the rotary kiln body; and multiple second air ducts located between the two mounting outer rings and connected to the inside of the two mounting outer rings.

[0010] The second air duct has multiple through-holes on the side near the main body of the rotary kiln, and the mounting outer ring is connected to the exhaust fan through the third air duct.

[0011] Furthermore, the material conveying unit includes a horizontal material conveying cylinder connected to the hollow snap-fit ​​ring, a spiral material conveying roller disposed inside the horizontal material conveying cylinder, a rotary motor driving the spiral material conveying roller to rotate, and a vertical hopper that is connected through the upper end of the horizontal material conveying cylinder. A discharge control valve is provided at the connection between the vertical hopper and the horizontal material conveying cylinder.

[0012] Explanation: When refractory material is added to the rotary kiln body through the feeding unit, the rotating motor drives the spiral feeding roller to rotate. At the same time, the discharge control valve is opened, allowing the refractory material in the vertical hopper to fall into the horizontal feeding cylinder. It is then transported to the feed inlet of the rotary kiln body by the spiral feeding roller, ensuring that the refractory material is delivered evenly and continuously to the feed inlet of the rotary kiln body. This avoids inconsistent kiln lining thickness caused by uneven feeding. By adjusting the discharge control valve, the amount of refractory material added can be precisely controlled to adapt to different working conditions and improve the accuracy and quality of kiln lining.

[0013] Furthermore, the inner wall of the hollow fastening ring is provided with multiple air jet columns along the circumference. The air jet columns have a mesh structure, and the inner wall of the hollow fastening ring is connected to an annular protective net through connecting columns.

[0014] Explanation: When the refractory material enters the rotary kiln body through the hollow interlocking ring, the temperature of the rotary kiln body is monitored in real time by an online infrared thermal imager. When it is necessary to control the temperature reduction, air is injected from all directions through various jet columns on the inner wall of the hollow interlocking ring to cool the interior of the rotary kiln body, ensuring uniform temperature distribution inside the kiln and avoiding local overheating. It has the advantages of precise temperature control and rapid cooling, which not only improves the efficiency and quality of kiln lining but also reduces operating costs. At the same time, since the jet columns have a mesh structure, it further ensures uniform temperature distribution inside the kiln. In addition, the ring-shaped protective netting blocks the jet columns, preventing direct contact between the refractory material and the jet columns and causing blockage, thus improving the reliability of equipment operation.

[0015] Furthermore, filter boxes are respectively provided at the connection between the first air duct and the exhaust fan, and at the connection between the third air duct and the exhaust fan, and cleaning windows are provided on the side walls of the filter boxes.

[0016] Explanation: When cooling the interior of the rotary kiln, the exhaust fan first draws outside air into the filter box to remove impurities, and then sends it into the rotary kiln body through the first air duct for internal cooling. It then sends the air into each of the second air ducts through the third air duct for external cooling. This dual cooling method, which cools both the interior and exterior simultaneously, can significantly improve cooling efficiency and prevent damage to the rotary kiln body due to high temperatures. Combined with real-time temperature monitoring by an online infrared thermal imager, the exhaust fan and air duct system can adjust the air volume and speed as needed to ensure that the temperature is always within the optimal range.

[0017] Furthermore, the mounting outer ring is formed by two interlocking arc-shaped outer rings, and each of the second air ducts is movably connected to the corresponding side wall of the arc-shaped outer ring.

[0018] Note: The installation outer ring is limited to two interlocking arc-shaped outer rings. This modular design makes it easier to replace the entire installation outer ring. At the same time, the second air duct is movably connected to the corresponding arc-shaped outer ring sidewall, which facilitates partial replacement of a certain second air duct without dismantling the entire device. The modular and movable connection design makes maintenance faster and more convenient, ensuring that the equipment can be restored to normal operation as soon as possible.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a kiln lining device for a hazardous waste rotary kiln. Through the coordinated operation of the spiral conveying rollers and discharge control valve in the material conveying unit, it ensures the uniform and continuous delivery of refractory material to the main feed inlet of the rotary kiln, avoiding inconsistent kiln lining thickness caused by uneven material feeding and improving kiln lining quality. By using an online infrared thermal imager to monitor the kiln temperature in real time and employing a coordinated internal and external cooling method to cool both the inside and outside of the kiln, it significantly improves cooling efficiency, prevents kiln damage due to high temperatures, achieves precise temperature control within the kiln, avoids localized overheating or undercooling, and ensures uniform sintering of the kiln lining. Through optimized design of the material conveying unit, temperature control unit, and air duct system, it overcomes the shortcomings of existing kiln lining devices in refractory material feeding, temperature control, and cooling efficiency. It features uniform feeding, precise temperature control, efficient cooling, reliable operation, and easy maintenance, significantly improving the operating efficiency and service life of hazardous waste rotary kilns, reducing operating costs, and has broad application prospects. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the installation structure of the second air duct of this utility model between the two mounting outer rings;

[0023] Figure 3 This is a side view of the installation of the second air duct of this utility model;

[0024] Figure 4 This is a structural schematic diagram of the hollow fastening ring of this utility model.

[0025] Among them, 1-rotary kiln body, 2-material conveying unit, 20-horizontal material conveying cylinder, 21-spiral material conveying roller, 22-rotary motor, 23-vertical hopper, 230-emission control valve, 3-burner, 4-temperature control unit, 40-hollow fastening ring, 400-jet column, 401-connecting column, 402-ring protective net, 41-exhaust fan, 410-first air duct, 411-solenoid valve, 42-online infrared thermal imager, 43-installation outer ring, 430-third air duct, 431-arc outer ring, 44-second air duct, 440-through air outlet, 45-filter box, 450-cleaning window. Detailed Implementation

[0026] Example 1: As Figure 1 As shown, a kiln lining device for a hazardous waste rotary kiln includes a rotary kiln body 1, a material conveying unit 2 connected to the feed inlet of the rotary kiln body 1, a burner 3 located at the tail of the rotary kiln body 1, and a temperature control unit 4 for controlling the kiln lining temperature. The burner 3 adopts existing technology, such as a Duoflex burner.

[0027] like Figure 2 , 3 As shown, the temperature control unit 4 includes a hollow snap-fit ​​ring 40 located at the feed inlet of the rotary kiln body 1 and connected to the conveying unit 2; an exhaust fan 41 that is connected to the hollow snap-fit ​​ring 40 through a first air duct 410 and has a solenoid valve 411 at the connection point; an online infrared thermal imager 42 located on the outer wall of the rotary kiln body 1; two mounting outer rings 43 fitted on both sides of the outside of the rotary kiln body 1; and ten second air ducts 44 located between the two mounting outer rings 43 and connected to the inside of the two mounting outer rings 43. The solenoid valve 411, the exhaust fan 41, and the online infrared thermal imager 42 all adopt existing technologies. For example, the solenoid valve 411 can be a general-purpose solenoid valve of model SMC VQZ, the exhaust fan 41 can be an exhaust fan of model BM-Papst W2E200, and the online infrared thermal imager 42 can be a thermal imager of model Optris PI 640.

[0028] The second air duct 44 has 20 through air outlet holes 440 on the side near the main body 1 of the rotary kiln, and the outer ring 43 is connected to the exhaust fan 41 through the third air duct 430.

[0029] like Figure 1As shown, the material conveying unit 2 includes a horizontal conveying cylinder 20 connected to a hollow fastening ring 40, a spiral conveying roller 21 disposed within the horizontal conveying cylinder 20, a rotary motor 22 driving the spiral conveying roller 21 to rotate, and a vertical hopper 23 connected through the upper end of the horizontal conveying cylinder 20. A discharge control valve 230 is provided at the connection between the vertical hopper 23 and the horizontal conveying cylinder 20 to ensure that the refractory material is uniformly and continuously conveyed to the feed inlet of the rotary kiln body 1, avoiding inconsistent kiln lining thickness caused by uneven feeding. By adjusting the discharge control valve 230, the amount of refractory material added can be precisely controlled to adapt to different working conditions and improve the accuracy and quality of kiln lining. The spiral conveying roller 21, rotary motor 22, and discharge control valve 230 all adopt existing technologies. For example, the spiral conveying roller 21 can be a model LS200 spiral conveying roller, the rotary motor 22 can be a model M2QA100 rotary motor, and the discharge control valve 230 can be a model Burkert. 6213 emission control valve;

[0030] like Figure 4 As shown, the inner wall of the hollow fastening ring 40 is provided with 16 air jet columns 400 along the circumference. The air jet columns 400 have a mesh structure, and the inner wall of the hollow fastening ring 40 is connected to an annular protective net 402 through connecting columns 401. When the refractory material enters the rotary kiln body 1 through the hollow fastening ring 40, the temperature of the rotary kiln body 1 is monitored in real time by an online infrared thermal imager 42. When it is necessary to control the temperature reduction, air is injected from all directions through the air jet columns 400 on the inner wall of the hollow fastening ring 40 to cool the inside of the rotary kiln body 1, ensuring uniform temperature distribution inside the kiln and avoiding local overheating. It has the advantages of precise temperature control and rapid cooling, which not only improves the efficiency and quality of kiln coating, but also reduces operating costs. At the same time, since the air jet columns 400 have a mesh structure, it further ensures uniform temperature distribution inside the kiln. In addition, the annular protective net 402 blocks the air jet columns 400, preventing the refractory material from directly contacting the air jet columns 400 and causing blockage, thus improving the reliability of equipment operation.

[0031] like Figure 1As shown, filter boxes 45 are respectively provided at the connection between the first air duct 410 and the exhaust fan 41 and at the connection between the third air duct 440 and the exhaust fan 41. The side wall of the filter box 45 is provided with a cleaning window 450. When cooling the inside of the rotary kiln body 1, the exhaust fan 41 first draws the outside air into the filter box 45 to remove impurities, and then sends it into the rotary kiln body 1 through the first air duct 410 for internal cooling. It also sends it into each of the second air ducts 44 through the third air duct 440 for external cooling of the rotary kiln body 1. Through the dual cooling method of simultaneous internal and external cooling, the cooling efficiency can be significantly improved, and the rotary kiln body 1 can be prevented from being damaged by high temperature. Combined with the real-time temperature monitoring of the online infrared thermal imager 42, the exhaust fan 41 and the air duct system can adjust the air volume and air speed as needed to ensure that the temperature is always in the optimal range. The filter box 45 adopts existing air filtration equipment, such as the Hi-Flo II filter box.

[0032] like Figure 3 As shown, the mounting outer ring 43 is formed by two interlocking arc-shaped outer rings 431, and each second air duct 44 is snapped or bolted to the side wall of the corresponding arc-shaped outer ring 431. The mounting outer ring 43 is limited to two interlocking arc-shaped outer rings 431. This modular design makes it easier to replace the entire mounting outer ring 43. At the same time, the second air duct 44 is movably connected to the side wall of the corresponding arc-shaped outer ring 431, which facilitates partial replacement of a certain second air duct 44 without dismantling the entire equipment. The modular and movable connection design makes maintenance faster and more convenient, ensuring that the equipment can be restored to normal operation as soon as possible.

[0033] This embodiment describes a method for using a kiln lining device for a hazardous waste rotary kiln, comprising the following steps:

[0034] S1. Start the burner 3 to preheat the inner wall of the rotary kiln body 1. Drive the spiral conveyor roller 21 to rotate through the rotary motor 22. At the same time, open the discharge control valve 230 to let the refractory material in the vertical hopper 23 fall into the horizontal conveyor cylinder 20 and be conveyed to the feed port of the rotary kiln body 1 by the action of the spiral conveyor roller 21.

[0035] S2. When the refractory material enters the rotary kiln body 1 through the hollow connecting ring 40, the temperature of the rotary kiln body 1 is monitored in real time by the online infrared thermal imager 42. When it is necessary to control the temperature reduction, the exhaust fan 41 first draws the outside air into the filter box 45 to remove impurities. Then, it is first sent into the hollow connecting ring 40 through the first air duct 410. The air is then sprayed into the rotary kiln body 1 from all directions through the jet columns 400 on the inner wall of the hollow connecting ring 40 to cool the inside of the rotary kiln body 1. The air is then sent into the second air ducts 44 through the third air duct 440 to cool the outside of the rotary kiln body 1.

[0036] S3. The refractory material forms a uniform kiln skin on the inner wall of the rotary kiln body 1. The rotary kiln body 1 operates at high temperature, which causes the kiln skin to solidify and sinter.

Claims

1. A hanging clinker apparatus for a hazardous waste rotary kiln, characterized by, The rotary kiln body (1), the material conveying unit (2) connected with the feeding port of the rotary kiln body (1), the burner (3) arranged at the tail of the rotary kiln body (1), and the temperature control unit (4) for controlling the temperature of the kiln skin; The temperature control unit (4) comprises a hollow buckle ring (40) arranged at the feeding port of the rotary kiln body (1) and connected with the material conveying unit (2), an air extractor (41) connected with the inside of the hollow buckle ring (40) through a first air duct (410) and provided with an electromagnetic valve (411) at the connection position, an online infrared thermal imager (42) arranged on the outer wall of the rotary kiln body (1), two installation outer rings (43) sleeved on both sides of the rotary kiln body (1), and a plurality of second air ducts (44) arranged between the two installation outer rings (43) and penetrating through the inside of the two installation outer rings (43). A plurality of through air holes (440) are arranged on the second air duct (44) close to one side of the rotary kiln body (1), and the installation outer ring (43) is connected with the air extractor (41) through a third air duct (430).

2. A hanging clinker device for a hazardous waste rotary kiln according to claim 1, wherein The material conveying unit (2) comprises a horizontal material conveying cylinder (20) connected with the hollow buckle ring (40), a spiral material conveying roller (21) arranged in the horizontal material conveying cylinder (20), a rotary motor (22) for driving the spiral material conveying roller (21) to rotate, and a vertical material bin (23) connected with the upper end of the horizontal material conveying cylinder (20), wherein the connection position of the vertical material bin (23) and the horizontal material conveying cylinder (20) is provided with a discharge control valve (230).

3. A hanging refractory device for a hazardous waste rotary kiln according to claim 1 wherein, A plurality of jet columns (400) are arranged on the inner wall of the hollow buckle ring (40) in the circumferential direction, the jet column (400) is a mesh structure, and the inner wall of the hollow buckle ring (40) is connected with an annular protective net (402) through a connecting column (401).

4. A hanging refractory device for a hazardous waste rotary kiln according to claim 1 wherein, The connection position of the first air duct (410) and the air extractor (41) and the connection position of the third air duct (430) and the air extractor (41) are respectively provided with a filter box (45), and the side wall of the filter box (45) is provided with a cleaning window (450).

5. A hanging refractory device for a hazardous waste rotary kiln according to claim 1 wherein, The installation outer ring (43) is formed by mutually buckling two arc-shaped outer rings (431), and each second air duct (44) is movably connected with the side wall of the corresponding arc-shaped outer ring (431).

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