A continuous transfer microwave high temperature apparatus for treating fly ash

Abstract

The application discloses a continuous transmission microwave high-temperature equipment for treating fly ash, which comprises a reaction cavity, an inlet and an outlet arranged at the right end and the left end of the reaction cavity respectively, wherein the inlet is provided with an inlet microwave suppression channel and the outlet is provided with an outlet microwave suppression channel, and the inlet microwave suppression channel and the outlet microwave suppression channel are used for preventing microwave leakage; a belt conveying mechanism installed in the reaction cavity; a sealed feeding system comprising a closed stock bin, a quantitative feeding device and an isolation structure, wherein the quantitative feeding device is connected between the closed stock bin and the inlet microwave suppression channel, and the isolation structure is arranged at the inlet microwave suppression channel; and a microwave generating coupling system used for heating fly ash in the reaction cavity, which is installed at the top of the reaction cavity. The application meets the requirements of continuous feeding stability and reaction cavity sealing, and effectively avoids problems such as gas backflow, microwave leakage and dust escape.

Description

Technical Field

[0001] This invention belongs to the field of waste treatment equipment, specifically relating to a continuous transmission microwave high-temperature device for treating fly ash. Background Technology

[0002] As the scale of municipal solid waste incineration continues to expand, the amount of incineration fly ash and other powdery byproducts generated is increasing, making the engineering demand for their stabilization / high-temperature treatment and resource utilization increasingly prominent.

[0003] Microwave heating, characterized by rapid temperature rise, volumetric heating, and high energy efficiency, has been widely used in the thermal treatment of solid waste. To meet the demands of continuous and large-scale applications, related equipment is gradually evolving from intermittent to continuous operation, particularly towards continuous processing via belt conveyors. However, in the continuous high-temperature processing of municipal solid waste incineration fly ash, existing belt microwave processing equipment still has shortcomings in areas such as continuous sealed feeding and discharging, microwave suppression at the inlet / outlet, controllable atmosphere and pressure, and uniform temperature field. The stability and safety of continuous operation at high temperatures (e.g., above 300°C) still need improvement.

[0004] For example, patent CN105222582A discloses a microwave and electric hybrid heating high-temperature device, which includes a furnace body, a microwave system, a heat preservation system, a temperature measurement system, a feeding and discharging system, a material conveying system, a gas control system, a cooling system and a PLC control system. The furnace body is made of heat-resistant metal or graphite. The microwave system (11) is located on the top of the furnace body. A blind plate is installed at the connection position between the waveguide (10) of the microwave system (11) and the furnace body.

[0005] The patent with publication number CN106334508A discloses a continuous transmission type focusing microwave reactor, which includes a reaction device, a transmission device, a power supply device, and a support device. The power supply device includes a metal reflective surface, a radiating horn, a coaxial transmission line, a waveguide coaxial converter, and a microwave source. The metal reflective surface is disposed on the inner wall of the top surface of the metal cavity. The microwave source is connected to the radiating horn through the coaxial transmission line and the waveguide coaxial converter. The radiating horn is fixed on the side wall of the metal cavity.

[0006] Both of the above microwave heating devices have the following shortcomings: 1. Insufficient sealing under continuous feeding conditions. The use of a simple feeding structure or a single isolation method makes it difficult to simultaneously meet the requirements of feeding stability and reaction chamber sealing during continuous feeding, easily leading to problems such as gas backflow and dust escape.

[0007] 2. High risk of microwave leakage at inlets and outlets. The inlets and outlets are mostly open or simply closed structures, without effective microwave suppression structures for continuous conveyor belt operation, posing a safety hazard of microwave leakage along the inlet and outlet directions.

[0008] 3. Uneven layering of powder materials leads to uneven heating. For materials such as fly ash from municipal solid waste incineration, the lack of effective layering and thickness control structures can easily lead to uneven material distribution on the conveyor belt, resulting in localized overheating or underheating.

[0009] 4. Microwave heating methods are limited and temperature distribution is difficult to control. Centralized or single-zone microwave heating methods make it difficult to control heating in different zones according to the different stages of material transportation, affecting heating uniformity and processing efficiency.

[0010] 5. Limited gas regulation capability. Insufficient consideration is given to gas regulation within the reaction chamber, making it difficult to flexibly switch between inert gas, slightly positive pressure, or slightly negative pressure conditions, which is detrimental to the safe and stable operation of the high-temperature continuous processing. Summary of the Invention

[0011] To address the shortcomings of existing technologies, this invention provides a continuous transmission microwave high-temperature device for treating fly ash, comprising a reaction chamber with an inlet and an outlet corresponding to its right and left ends. The inlet has an inlet microwave suppression channel, and the outlet has an outlet microwave suppression channel, both used to prevent microwave leakage. The device includes a belt conveyor installed inside the reaction chamber; a sealed feeding system comprising a sealed hopper, a metering device, and an isolation structure, wherein the metering device is connected between the sealed hopper and the inlet microwave suppression channel, and the isolation structure is located at the inlet microwave suppression channel; a microwave generating coupling system for heating the fly ash inside the reaction chamber, the microwave generating coupling system being installed at the top of the reaction chamber; a gas regulating system for regulating the gas inside the reaction chamber, wherein the inert gas supply pipeline of the gas regulating system is connected to the reaction chamber, the sealed feeding system, and the outlet microwave suppression channel; and a tail gas collection system for maintaining the gas pressure inside the reaction chamber, the tail gas collection system being connected to the reaction chamber with the connection point near the left end of the reaction chamber.

[0012] A preferred embodiment of the continuous transmission microwave high-temperature device for treating fly ash in this invention is as follows: the end of the outlet microwave suppression channel is equipped with a cooling section and a flexible, heat-resistant, sealed discharge structure. After the fly ash has reacted, it passes through the cooling section to cool down before being discharged from the flexible, heat-resistant, sealed discharge structure. Furthermore, the isolation structure is a two-stage airlock isolation structure, and a flexible, heat-resistant, sealed feed structure is provided at the end of the inlet microwave suppression channel. The flexible, heat-resistant, sealed discharge structure and the flexible, heat-resistant, sealed feed structure work together to effectively seal dust and microwaves inside the reaction chamber, minimizing the possibility of leakage.

[0013] A preferred embodiment of the continuous transmission microwave high-temperature equipment for treating fly ash in this invention is as follows: the belt conveyor mechanism includes a high-temperature resistant conveyor belt, support rollers, a tensioning mechanism, and an anti-deviation guide structure. Multiple support rollers are provided, all arranged parallel to the bottom of the reaction chamber and the bottom of the cooling section. The high-temperature resistant conveyor belt is rotatably connected to the outside of the tensioning mechanism and all the support rollers. A spreading and layering shaping structure is provided at the feed end of the high-temperature resistant conveyor belt. The belt conveyor mechanism is used to carry and continuously transport municipal solid waste incineration fly ash, and combined with the spreading and layering shaping structure, controls the thickness of the fly ash layer on the high-temperature resistant conveyor belt, making the material distribution more uniform. Specifically, the spreading and layering shaping structure includes multiple rotating rollers rotatably connected inside the reaction chamber. Each rotating roller has a telescopic motor and a rotary motor connected to both ends. The telescopic shaft of each telescopic motor is coaxially connected to one end of the corresponding rotating roller through a bearing. The rotating shaft of each rotary motor is coaxially connected to the spline hole at the other end of the corresponding rotating roller through a spline shaft. All rotating rollers are evenly distributed along the moving direction of the high-temperature resistant conveyor belt. The outer surface of each rotating roller is covered with hair bundles, and the hair bundles of each adjacent two rotating rollers are staggered. From the feed end to the discharge end, the length of the hair bundles of all rotating rollers increases sequentially.

[0014] A preferred embodiment of the continuous transmission microwave high-temperature equipment for treating fly ash in this invention is as follows: the sealed silo is equipped with an arch-breaking device, and the end of the quantitative feeding device is equipped with a transition buffer chamber, which is connected to an inert gas supply pipeline. The inert gas supply pipeline is equipped with an air blowing / air extraction interface, which simultaneously introduces inert gas and extracts air, achieving sealing and air isolation under continuous feeding conditions, forming an isolation space inside the reaction chamber, and further preventing microwave leakage and air backflow.

[0015] A preferred embodiment of the continuous transmission microwave high-temperature device for treating fly ash in this invention is as follows: The microwave generation coupling system includes multiple microwave generator units, each connected to the inner cavity of the reaction chamber via a waveguide coupling structure. Each microwave generator unit and its corresponding waveguide coupling structure form an independent structure. All microwave generator units are arranged in zones along the length of the reaction chamber, corresponding to the preheating zone, main reaction zone, and heat preservation and homogenization zone, respectively, achieving zoned microwave heating. Furthermore, all microwave generator units are modular and detachable, facilitating maintenance and replacement. The waveguide coupling structure introduces microwave energy into the reaction chamber, enabling zoned and targeted heating.

[0016] The preferred embodiment of the continuous transmission microwave high-temperature device for treating fly ash in this invention is that the cross-sectional shape of both the outlet microwave suppression channel and the inlet microwave suppression channel is serpentine. The outlet and inlet microwave suppression channels increase the path required for materials to enter and exit the reaction chamber, and, combined with a flexible, heat-resistant sealing structure, greatly reduce the probability of material, microwave, and other contaminant spillage.

[0017] A preferred embodiment of the continuous transmission microwave high-temperature device for treating fly ash in this invention is as follows: the exhaust gas collection system includes an exhaust gas pipe and an exhaust fan installed inside the exhaust gas pipe. The exhaust fan regulates the internal air pressure of the reaction chamber to maintain a slightly positive or slightly negative pressure operating state.

[0018] The beneficial effects of the continuous transmission microwave high-temperature device for treating fly ash in this invention are as follows: 1. Suppression channels are provided at the inlet and outlet respectively, and in conjunction with a sealed feeding system and a sealed discharge structure, the fly ash from municipal solid waste incineration is continuously and quantitatively fed. This satisfies the requirements of continuous feeding stability and the sealing of the reaction chamber, effectively avoiding problems such as gas backflow, microwave leakage, and dust escape.

[0019] 2. The gas regulation system and the exhaust gas collection system work together to control the gas pressure inside the reaction chamber. The gas pressure regulation has a fast response speed and can easily achieve flexible switching between inert gas, slightly positive pressure or slightly negative pressure conditions, which is conducive to the safe and stable operation of the high-temperature continuous processing process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the continuous transmission microwave high-temperature device for treating fly ash in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the continuous transmission microwave high-temperature device for treating fly ash in this invention. Figure 2 ; Figure 3 In this invention Figure 1 Three-dimensional reaction chamber Figure 1 ; Figure 4 In this invention Figure 1 Three-dimensional reaction chamber Figure 2 ; Figure 5In this invention Figure 3 Internal structure diagram; Figure 6 This is a schematic diagram of the rotating roller in this invention.

[0022] Reference numerals in the attached diagram: 1. Main frame; 2. Sealed feeding system; 3. Inlet microwave suppression channel; 4. Reaction chamber; 5. Microwave generation coupling system; 6. Gas conditioning system; 7. Outlet microwave suppression channel; 8. Control and safety system.

[0023] 201. Sealed silo; 202. Quantitative feeding device; 203. Transition buffer silo; 204. Double-stage airlock isolation structure; 205. Arch breaking device; 206. Air blowing / exhausting interface; 302. Flexible high-temperature resistant sealed feeding structure; 401. Shielding shell; 402. Resonant cavity; 403. Insulation layer; 404. High-temperature resistant conveyor belt; 405. Support rollers; 406. Tensioning mechanism; 407. Anti-deviation guide structure; 408. Spreading and... Layered shaping structure; 4081, rotating roller; 4082, telescopic motor; 4083, rotary motor; 4084, bearing; 4085, splined shaft; 4086, wool bundle; 409, guide roller; 410, tension spring; 501, microwave generator unit; 502, waveguide coupling structure; 601, inert gas supply pipeline; 602, exhaust pipe; 603, induced draft device; 702, cooling section; 703, flexible, heat-resistant, sealed discharge structure. Detailed Implementation

[0024] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0025] like Figure 1As shown, this embodiment provides a continuous transmission microwave high-temperature device for treating fly ash, including a reaction chamber 4. The reaction chamber 4 adopts a rectangular cavity structure, and is supported on the ground by a frame body 1. The reaction chamber 4 body consists of a shielding shell 401, a heat insulation layer 403, and a heat-resistant lining from the outside to the inside. A resonant cavity 402 for microwave reaction is provided between the shielding shell 401 and the heat insulation layer 403. The shielding shell 401 is made of metal, and the heat-resistant lining is made of high-temperature resistant material. An inlet and an outlet are provided at the right and left ends of the reaction chamber 4, respectively. The inlet has an inlet microwave suppression channel 3, and the outlet has an outlet microwave suppression channel 7. Both the inlet microwave suppression channel 3 and the outlet microwave suppression channel 7 are used to prevent microwave leakage. The inlet microwave suppression channel 3 and the outlet microwave suppression channel 7 adopt the same structure; specifically, the cross-sectional shape of both the outlet microwave suppression channel 7 and the inlet microwave suppression channel 3 is serpentine. This serpentine structure, with its winding and meandering shape, significantly increases the path required for materials to enter and exit the reaction chamber 4, which helps reduce the probability of spillage of materials, microwaves, and other contaminants.

[0026] To reduce the probability of leakage of contaminants such as microwaves and dust, this embodiment adds a sealed feeding system 2 to the feeding end of the inlet microwave suppression channel 3. The specific structure of the sealed feeding system 2 is as follows: like Figure 2 As shown, the sealed feeding system 2 includes a sealed silo 201, a quantitative feeding device 202, and an isolation structure. The quantitative feeding device 202 is connected between the sealed silo 201 and the inlet microwave suppression channel 3, and the isolation structure is located at the inlet microwave suppression channel 3. The isolation structure is a double-stage airlock isolation structure 204, and a flexible, heat-resistant sealed feeding structure 302 is provided at the end of the inlet microwave suppression channel 3. Simultaneously, a cooling section 702 and a flexible, heat-resistant sealed discharge structure 703 are provided at the end of the outlet microwave suppression channel 7. After the reaction, the fly ash passes through the cooling section 702 for cooling and then is discharged from the flexible, heat-resistant sealed discharge structure 703. The flexible, heat-resistant sealed discharge structure 703 and the flexible, heat-resistant sealed feeding structure 302 are used in conjunction with the inlet and outlet microwave suppression channels 3 to effectively seal dust and microwaves inside the reaction chamber 4. Compared to common open / simple closed feeding and discharging structures, this is more suitable for leakage suppression in continuous belt-type processes, significantly reducing the probability of external leakage. Among them, the flexible heat-resistant sealed discharge structure 703 and the flexible heat-resistant sealed feed structure 302 can be made of flexible heat-resistant sealing curtains or inert gas curtains, which can better prevent microwave leakage and air backflow.

[0027] The sealed silo 201 is equipped with an arch-breaking device 205 inside, and the end of the quantitative feeding device 202 is equipped with a transition buffer silo 203. The quantitative feeding device 202 is a weightless screw feeder. The arch-breaking device 205 and the quantitative feeding device 202 work together to achieve continuous and stable feeding of fly ash from municipal solid waste incineration.

[0028] like Figure 2 As shown, the belt conveyor mechanism inside the reaction chamber 4 includes a high-temperature resistant conveyor belt 404, support rollers 405, a tensioning mechanism 406, and an anti-deviation guide structure 407. Multiple support rollers 405 are provided, and all support rollers 405 are arranged parallel to the bottom of the reaction chamber 4 and the bottom of the cooling section 702. The high-temperature resistant conveyor belt 404 is rotatably connected to the tensioning mechanism 406 and the outer side of all support rollers 405. The tensioning mechanism 406 consists of a guide roller 409 and a tension spring 410. The two ends of the tension spring 410 are connected between the guide roller 409 and the shielding shell 401. The tension of the tension spring 410 causes the guide roller 409, located inside the high-temperature resistant conveyor belt 404, to tighten the high-temperature resistant conveyor belt 404, thereby maintaining effective tension on the high-temperature resistant conveyor belt 404. The feeding end of the high-temperature resistant conveyor belt 404 is equipped with a spreading and layering shaping structure 408. The belt conveyor mechanism is used to carry and continuously transport the fly ash from municipal solid waste incineration. Combined with the spreading and layering shaping structure 408, the thickness of the fly ash spread on the high-temperature resistant conveyor belt 404 is controlled, resulting in a more uniform material distribution and improved heating uniformity. To further ensure uniform heating of the material, this embodiment includes a microwave generation coupling system 5 inside the reaction chamber 4. The specific structure of the spreading and layering shaping structure (408) and the microwave generation coupling system 5 is as follows: like Figures 3 to 6As shown, the spreading and layering shaping structure 408 includes three rotating rollers 4081 rotatably connected inside the reaction chamber 4, but not limited to three; the number of rotating rollers 4081 can be adjusted according to actual needs. Each rotating roller 4081 has a telescopic motor 4082 and a rotary motor 4083 connected to both ends. The telescopic shaft of each telescopic motor 4082 is coaxially connected to one end of the corresponding rotating roller 4081 via a bearing 4084. While the telescopic motor 4082 drives the corresponding rotating roller 4081 to extend and retract, the presence of the bearing 4084 ensures that the telescopic shaft drives the rotating roller 4081 to move back and forth linearly without affecting the rotation of the rotating roller 4081; that is, extension and rotation do not affect each other. Each rotating motor 4083 has its shaft coaxially connected to the spline hole at the other end of the corresponding rotating roller 4081 via a splined shaft 4085. The rotating motor 4083 drives the corresponding rotating roller 4081 to rotate forward or backward. Since the splined shaft 4085 can slide axially relative to the spline hole, the rotation of the rotating roller 4081 is not affected by the reciprocating linear sliding of the rotating roller 4081. All rotating rollers 4081 are evenly distributed along the moving direction of the high-temperature resistant conveyor belt 404. The outer surface of each rotating roller 4081 is covered with bristle bundles 4086, and the bristle bundles 4086 of each adjacent rotating roller 4081 are staggered. Specifically, multiple sets of bristle bundles 4086 are evenly distributed axially on each rotating roller 4081. The bristles are made of wear-resistant and corrosion-resistant flexible materials (such as nylon, rubber, or polyurethane). The length of the bristle bundles 4086 of each rotating roller 4081 is slightly greater than the expected fly ash accumulation thickness at the current position. The bristle bundles 4086 on adjacent shafts are staggered to cover the entire width of the conveyor belt.

[0029] Each of the aforementioned rotating rollers 4081 employs a composite motion structure combining rotation and reciprocating linear movement. This structure provides the following advantages: The rotating bristles 4086 break up clumps or piles of fly ash, restoring it to a loose state. Because the bristles 4086 generate lateral force upon contact with the fly ash, and adjacent rotating rollers 4081 rotate in opposite directions while the rollers 4081 move laterally in a reciprocating linear motion, the fly ash is pushed from the accumulation point to both sides or in a uniform direction, achieving lateral distribution adjustment. Furthermore, from the feed end to the discharge end, the length of the bristles 4086 on all rotating rollers 4081 increases sequentially. This sequential increase in bristle length allows the expected fly ash accumulation thickness of each rotating roller 4081 to decrease gradually in a stepwise manner until the expected fly ash accumulation thickness of the last rotating roller 4081 is closer to the actual fly ash accumulation thickness. This reduces the difficulty of smoothing the fly ash on the last rotating roller 4081, effectively distributing the smoothing difficulty evenly across the three rotating rollers 4081, resulting in a better smoothing effect. The continuous action of three sets of hair bundles 4086 causes the fly ash to be gradually flattened in the direction of movement of the high-temperature resistant conveyor belt 404, eventually forming a thin layer of uniform thickness.

[0030] Traditional scrapers are rigid and fixed, prone to material jamming or wear. In contrast, this spreading and layering shaping structure 408 utilizes flexible rotating bristles 4086, effectively leveling the material without damaging the high-temperature resistant conveyor belt 404, making it particularly suitable for fine-particle, easily airborne fly ash. Three rotating rollers 4081 work synergistically, with staggered arrangement and counter-rotating rotation, forming a three-dimensional dynamic leveling field, avoiding localized accumulation caused by unidirectional pushing and achieving uniformity across the entire width. The rotation speed of each roller 4081 is independently adjustable, allowing for optimization of operating parameters for different flow rates and fly ash characteristics, thus broadening its applicability. Combined with a closed reaction chamber 4, dust prevention is integrated; the closed structure combined with dust collection meets environmental protection requirements and avoids secondary pollution.

[0031] like Figure 2 As shown, the microwave generation coupling system 5 is installed on the top of the reaction cavity 4. The microwave generation coupling system 5 includes multiple microwave generator units 501. The specific number of microwave generator units 501 is determined according to the length of the reaction cavity 4, and each microwave generator unit 501 is connected to the inner cavity of the reaction cavity 4 through a waveguide coupling structure 502. That is, the microwave generator units 501 adopt multiple independent microwave units (each with a microwave power of 1.5kW) connected in parallel. Each microwave unit is a modular and detachable structure, connected to the reaction cavity 4 through a waveguide. The microwave units are staggered along the length of the reaction cavity 4 to improve the uniformity of microwave energy distribution and facilitate maintenance. All the microwave generator units 501 are arranged in zones along the length of the reaction cavity 4, corresponding to the preheating zone, the main reaction zone, and the heat preservation and homogenization zone of the reaction cavity 4, respectively, to achieve zoned microwave heating.

[0032] like Figure 2 As shown, this embodiment also includes a gas regulation system 6, which is used for filling inert gas and venting air. Specifically, inert gas supply pipes 601 are connected to the reaction chamber 4, the sealed feeding system 2, and the outlet microwave suppression channel 7, and are specifically connected to the transition buffer chamber 203 of the sealed feeding system 2. Each connection is equipped with a blow-in / exhaust port 206, which allows inert gas to be introduced while air is extracted, achieving sealing and air isolation under continuous feeding conditions, forming an isolation space inside the reaction chamber 4, and further preventing microwave leakage and air backflow.

[0033] In addition, such as Figure 2 As shown, this embodiment also includes an exhaust gas collection system, which includes an exhaust pipe 602 and an exhaust fan 603 installed inside the exhaust pipe 602. The exhaust pipe 602 is connected to the top of the reaction chamber 4 and is close to the left end of the reaction chamber 4. The exhaust fan adjusts the air pressure inside the reaction chamber 4 to maintain a slightly positive or slightly negative pressure operating state.

[0034] like Figure 1As shown, this embodiment also includes a control and safety system 8, which is electrically connected to the belt conveyor mechanism, the microwave generating coupling system 5, and the gas regulating system 6. The control and safety system 8 is connected to the microwave power of the belt conveyor mechanism and the microwave generating coupling system 5, and the positive or negative pressure regulation of the gas regulating system 6. If any parameter becomes abnormal, the protection mechanism of the control and safety system 8 is immediately triggered, stopping the heating operation and ensuring the safe operation of the equipment.

[0035] The continuous transmission microwave high-temperature equipment provided in this embodiment is adapted to the sealed feeding and atmosphere isolation of fly ash from municipal solid waste incineration under continuous operation. It employs a combination of "transition buffer chamber 203 + double-stage airlock isolation + inert gas / extraction interface," maintaining a stable atmosphere in the reaction chamber 4 during continuous feeding and reducing the risk of dust escape and gas backflow. The microwave leakage risk is lower under continuous feeding conditions: a labyrinthine microwave suppression channel is set at the inlet and outlet, coupled with a durable and flexible seal (optional inert gas curtain), making it more suitable for leakage suppression in continuous belt-type processes compared to common open / simple closed feeding / discharging structures. Heating uniformity is better and controllability is stronger: the spreading and layering shaping structure 408 stabilizes the spreading thickness, and the chamber is divided into a preheating zone / main reaction zone / heat preservation and homogenization zone along the conveying direction. Combined with a zoned and controllable microwave generator unit 501, the material receives a more matched energy input at different stages, reducing local overheating / underheating. Meanwhile, it offers enhanced operational safety and adaptability: the multi-point inert gas interface + exhaust gas collection port + induced draft device 603 can switch and maintain inert atmosphere, micro-positive pressure or micro-negative pressure, adapting to the safety requirements and exhaust gas organization and emission requirements in the high-temperature treatment process of fly ash.

[0036] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A continuous transmission microwave high-temperature device for treating fly ash, characterized in that: The reaction chamber (4) includes a feed inlet and a discharge outlet at the right and left ends of the reaction chamber (4), respectively. The feed inlet is provided with an inlet microwave suppression channel (3) and the discharge outlet is provided with an outlet microwave suppression channel (7). Both the inlet microwave suppression channel (3) and the outlet microwave suppression channel (7) are used to prevent leakage. Includes a belt conveyor mechanism installed inside the reaction chamber (4); The sealed feeding system (2) includes a sealed silo (201), a quantitative feeding device (202) and an isolation structure. The quantitative feeding device (202) is connected between the sealed silo (201) and the inlet microwave suppression channel (3), and the isolation structure is located at the inlet microwave suppression channel (3). Includes a microwave generating coupling system (5) for heating fly ash inside the reaction chamber (4), the microwave generating coupling system (5) being installed on top of the reaction chamber (4); It includes a gas regulation system (6) for regulating the gas inside the reaction chamber (4), wherein the inert gas supply pipeline (601) of the gas regulation system (6) is connected to the reaction chamber (4), the sealed feeding system (2) and the outlet microwave suppression channel (7), respectively; Includes an exhaust gas collection system for maintaining the internal pressure of the reaction chamber (4), the exhaust gas collection system being connected to the reaction chamber (4) with the connection point near the left end of the reaction chamber (4).

2. The continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The reaction chamber (4) consists of a shielding shell (401), a heat insulation layer (403), and a heat-resistant inner lining, from the outside to the inside. A resonant cavity (402) for microwave reaction is provided between the shielding shell (401) and the heat insulation layer (403).

3. The continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The end of the microwave suppression channel (7) is provided with a cooling section (702) and a flexible heat-resistant sealed discharge structure (703). After the fly ash has been reacted, it passes through the cooling section (702) to cool down and then is discharged from the flexible heat-resistant sealed discharge structure (703).

4. The continuous transmission microwave high-temperature device for treating fly ash according to claim 3, characterized in that: The belt conveyor mechanism includes a high-temperature resistant conveyor belt (404), support rollers (405), a tensioning mechanism (406), and an anti-deviation guide structure (407). Multiple support rollers (405) are provided, and all support rollers (405) are arranged in parallel along the bottom of the reaction chamber (4) and the bottom of the cooling section (702). The high-temperature resistant conveyor belt (404) is rotatably connected to the outside of the tensioning mechanism (406) and all support rollers (405). The feed end of the high-temperature resistant conveyor belt (404) is provided with a material spreading and layering shaping structure (408) located above the high-temperature resistant conveyor belt (404).

5. A continuous transmission microwave high-temperature device for treating fly ash according to claim 4, characterized in that: The spreading and layering shaping structure (408) includes multiple rotating rollers (4081) rotatably connected inside the reaction chamber (4). Each rotating roller (4081) has a telescopic motor (4082) and a rotary motor (4083) connected to both ends. The telescopic shaft of each telescopic motor (4082) is coaxially connected to one end of the corresponding rotating roller (4081) through a bearing (4084). The rotating shaft of each rotary motor (4083) is coaxially connected to the spline hole at the other end of the corresponding rotating roller (4081) through a spline shaft (4085). All rotating rollers (4081) are evenly distributed along the moving direction of the high-temperature resistant conveyor belt (404). Each rotating roller (4081) has a hair bundle (4086) distributed on its outer surface, and the hair bundles (4086) of each two adjacent rotating rollers (4081) are staggered. From the feed end to the discharge end, the length of the hair bundles (4086) of all rotating rollers (4081) increases sequentially.

6. The continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The sealed silo (201) is equipped with an arch-breaking device (205) inside, and the end of the quantitative feeding device (202) is equipped with a transition buffer silo (203), which is connected to the inert gas supply pipeline (601).

7. A continuous transmission microwave high-temperature device for treating fly ash according to claim 6, characterized in that: The isolation structure is a two-stage airlock isolation structure (204), and a flexible, heat-resistant, sealed feeding structure (302) is provided at the end of the inlet microwave suppression channel (3).

8. The continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The microwave generating coupling system (5) includes a microwave generator unit (501), and multiple microwave generator units (501) are provided. Each microwave generator unit (501) is connected to the inner cavity of the reaction cavity (4) through a waveguide coupling structure (502).

9. A continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The cross-sectional shape of both the outlet microwave suppression channel (7) and the inlet microwave suppression channel (3) is serpentine.

10. A continuous transmission microwave high-temperature device for treating fly ash according to claim 1, characterized in that: The exhaust gas collection system includes an exhaust pipe (602) and an exhaust fan (603) installed inside the exhaust pipe (602).

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