Household garbage incineration fly ash microwave heating device with homogenization mechanism

Abstract

The utility model relates to domestic waste incineration fly ash processing technical field especially relates to a kind of domestic waste incineration fly ash microwave heating device with homogenization mechanism, including heating assembly, and heating assembly includes: microwave heating cavity top is provided with inlet; The inside of microwave heating cavity is provided with stirring assembly, and stirring assembly includes: stirring motor is set fixed in the top of microwave heating cavity;Stirring shaft is set in the output end of stirring motor;First horizontal rotating shaft is symmetrical to the outside of stirring shaft;Transmission part is set between stirring shaft and first horizontal rotating shaft;Stirring paddle is symmetrically fixed to the outside of first horizontal rotating shaft;Second horizontal rotating shaft is symmetrical to the outside of stirring shaft;Scraper is set fixed to one end of second horizontal rotating shaft;Bottom horizontal rotating shaft is set in the bottom of stirring shaft;Bottom stirring paddle is symmetrically fixed to the outside of bottom horizontal rotating shaft, and fly ash is mixed by stirring assembly, the inside wall of microwave heating cavity inner cavity is scraped, solve the problem that fly ash sticks wall and fly ash is unevenly heated.

Description

Technical Field

[0001] This utility model relates to the field of municipal solid waste incineration fly ash treatment technology, and in particular to a microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism. Background Technology

[0002] Municipal solid waste incineration fly ash is a secondary pollutant produced by waste-to-energy plants. It often contains heavy metals (such as Pb, Cd, and Hg), persistent organic pollutants (such as dioxins), and unburned carbon. Dioxins in waste incineration fly ash can be degraded by microwave heating, but the problem of uneven heating of waste incineration fly ash affects the treatment effect of dioxins.

[0003] Microwave heating is an "endogenous heating" method that uses electromagnetic waves to cause the molecules inside a substance to vibrate at high frequency (billions of times per second), generating heat through molecular friction. It has advantages such as fast heating speed, high energy utilization rate, and selective heating.

[0004] Existing microwave heating and stirring devices for municipal solid waste incineration fly ash suffer from problems such as fly ash clumping or sticking to the walls. Therefore, this invention proposes a microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism to solve the problems of uneven heating and sticking to the walls when microwave heating municipal solid waste incineration fly ash. Utility Model Content

[0005] The purpose of this invention is to provide a microwave heating device for fly ash from municipal solid waste incineration with a homogenization mechanism, so as to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is: A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism includes a heating assembly. The heating assembly includes: a feed inlet at the top of a microwave heating cavity; a base located at the bottom outer side of the microwave heating cavity; a hydraulic discharge valve located at the bottom outer side of the base; a discharge hopper located at the bottom of the hydraulic discharge valve; and a cooling conveying spiral located at the bottom of the hydraulic discharge valve. An agitation assembly is disposed inside the inner cavity. The agitation assembly includes: a stirring motor fixed at the top of the microwave heating cavity and located to one side of the feed inlet; a stirring shaft located at the output end of the stirring motor and inside the inner cavity; a first horizontal rotating shaft symmetrically located outside the stirring shaft; a transmission component located between the stirring shaft and the first horizontal rotating shaft; stirring blades symmetrically fixed outside the first horizontal rotating shaft; a second horizontal rotating shaft symmetrically located outside the stirring shaft and below the first horizontal rotating shaft; a scraper fixed at one end of the second horizontal rotating shaft and located on the inner wall of the inner cavity; a bottom horizontal rotating shaft located at the bottom of the stirring shaft; and bottom stirring blades symmetrically fixed outside the bottom horizontal rotating shaft.

[0007] Optionally, the transmission component includes: a first driving wheel symmetrically fixed to the outside of the stirring shaft; a second driving wheel symmetrically fixed to the outside of the stirring shaft and located below the first driving wheel; and a driven wheel that cooperates with the first driving wheel and the second driving wheel at one end of the first horizontal rotating shaft.

[0008] Optionally, the inner cavity is provided with a protective sleeve that mates with the transmission component.

[0009] Optionally, the inner cavity of the microwave heating cavity is a quartz tubular structure with a diameter of 0.5m to 1m, a height of 1m to 5m, and a wall thickness of 10mm to 30mm.

[0010] Optionally, the number of the first horizontal rotating shafts per layer is set to multiple sets; the number of the bottom horizontal rotating shafts is set to multiple sets.

[0011] Optionally, the stirring blades are one or more combinations of multiple rhombuses, multiple quadrilaterals, multiple triangles, and multiple circles, with the center of the stirring blades being hollow, and the bottom horizontal rotating shaft being one of the following shapes: sawtooth, rhombus, quadrilateral, triangular, and circular.

[0012] Optionally, the microwave heating cavity includes an inner cavity and an outer cavity, with a cover at the top; a waveguide symmetrical to the outer side of the outer cavity; and a magnetron disposed on one side of the waveguide.

[0013] Optionally, a thermocouple is provided on the outer side of the outer cavity, with the wiring terminals of the thermocouple located on the outer side of the outer cavity and the temperature measuring end of the thermocouple located on the outer wall of the inner cavity. The wiring terminals of the thermocouple are electrically connected to the temperature control device.

[0014] Compared with the prior art, the beneficial effects of this utility model are: By starting the stirring motor, the stirring motor drives the stirring shaft to rotate. The rotating stirring shaft drives the first horizontal rotating shaft to rotate longitudinally through the transmission component. The longitudinally rotating first horizontal rotating shaft drives the stirring blades to rotate, stirring and mixing the fly ash, thereby achieving uniform microwave heating of the fly ash. At the same time, the rotating stirring shaft drives the scraper and bottom stirring blades on the second horizontal rotating shaft and the bottom horizontal rotating shaft to rotate. The rotating scraper can scrape the inner wall of the inner cavity, solving the problem of fly ash sticking to the wall.

[0015] The microwave heating cavity has an inner cavity and an outer cavity. The electromagnetic waves generated by the microwave source first enter between the inner cavity and the outer cavity and then diffuse. The diffused microwaves penetrate the quartz tube and enter the inner cavity to heat the fly ash from the incineration of municipal solid waste. The rotating scraper refracts or reflects the penetrating microwaves, further dispersing the microwaves and avoiding high concentration of microwave field energy, thus achieving uniform distribution of microwave field energy and uniform microwave heating of fly ash. Attached Figure Description

[0016] 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 of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the transmission component in this application; Figure 3 This is a top view of the transmission component in this application. Figure label: 1. Heating assembly; 11. Microwave heating cavity; 111. Inner cavity; 112. Outer cavity; 113. Top cover; 114. Waveguide; 115. Magnetron; 116. Thermocouple; 117. Temperature control device; 12. Feed inlet; 13. Base; 14. Hydraulic discharge valve; 15. Discharge hopper; 16. Cooling conveyor screw; 2. Stirring assembly; 21. Stirring motor; 22. Stirring shaft; 23. First horizontal rotating shaft; 24. Transmission component; 241. First driving wheel; 242. Second driving wheel; 243. Driven wheel; 25. Protective sleeve; 26. Stirring blade; 27. Second horizontal rotating shaft; 28. Scraper; 29. ​​Bottom horizontal rotating shaft; 291. Bottom stirring blade. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Given that the existing technology has the problem of uneven heating of fly ash, which leads to fly ash agglomeration or sticking to the wall.

[0021] like Figure 1-3 As shown, this utility model embodiment provides a microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism, including a heating assembly 1. The heating assembly includes: a microwave heating cavity 11 with a feed inlet 12 at the top; a base 13 disposed at the bottom outer side of the microwave heating cavity 11; a hydraulic discharge valve 14 disposed at the bottom outer side of the base 13; a discharge hopper 15 disposed at the bottom of the hydraulic discharge valve 14; and a cooling conveying spiral 16 disposed at the bottom of the hydraulic discharge valve 14. A stirring assembly 2 is disposed inside the inner cavity 111. The stirring assembly 2 includes: a stirring motor 21 fixed to the top of the microwave heating cavity 11 and located on one side of the feed inlet 12; and a stirring shaft 22 disposed at the bottom of the microwave heating cavity 11. The output end of the stirring motor 21 is located inside the inner cavity 111; the first horizontal rotating shaft 23 is symmetrical to the outside of the stirring shaft 22; the transmission component 24 is disposed between the stirring shaft 22 and the first horizontal rotating shaft 23; the stirring blade 26 is symmetrically fixed to the outside of the first horizontal rotating shaft 23; the second horizontal rotating shaft 27 is symmetrical to the outside of the stirring shaft 22 and is located below the first horizontal rotating shaft 23; the scraper 28 is disposed and fixed to one end of the second horizontal rotating shaft 27 and is located on the inner side wall of the inner cavity 111; the bottom horizontal rotating shaft 29 is disposed at the bottom of the stirring shaft 22; the bottom stirring blade 291 is symmetrically fixed to the outside of the bottom horizontal rotating shaft 29.

[0022] In use, fly ash from municipal solid waste incineration is fed into the microwave heating chamber 111 through the feed inlet 12. The fly ash is then microwave-heated by the microwave heating chamber 11. Simultaneously, the stirring motor 21 is started, driving the stirring shaft 22 to rotate. The rotating stirring shaft 22 drives the first horizontal rotating shaft 23 to rotate longitudinally through the transmission component 24. The longitudinally rotating first horizontal rotating shaft 23 drives the stirring blade 26 to rotate longitudinally, stirring and mixing the fly ash to achieve uniform microwave heating. At the same time, the rotating stirring shaft 22 drives the scraper 28 and the bottom stirring blade 291 on the second horizontal rotating shaft 27 and the bottom horizontal rotating shaft 29 to rotate. The rotating scraper 28 can scrape the inner wall of the microwave heating chamber 111, solving the problem of fly ash sticking to the wall. After heating and stirring to reach the set temperature and residence time, the hydraulic unloading valve 14 is activated in conjunction with the cooling conveying screw 16 to discharge the fly ash.

[0023] Specifically, the mixing blades in the same layer have a 90-degree angle between them to ensure that the blades do not interfere with each other when the first horizontal rotating shaft rotates.

[0024] Specifically, the scraper 28 has a curved arc structure with an inner cavity 111 of equal diameter; the rotation areas of the scrapers 28 between different layers overlap, ensuring that all areas of the inner wall of the inner cavity 111 can be scraped, thus solving the problem of fly ash sticking to the wall.

[0025] Furthermore, the transmission component 24 includes: a first driving wheel 241 symmetrically fixed to the outside of the stirring shaft 22; a second driving wheel 242 symmetrically fixed to the outside of the stirring shaft 22 and located below the first driving wheel 241; a driven wheel 243 is provided at one end of the first horizontal rotating shaft 23 to cooperate with the first driving wheel 241 and the second driving wheel 242; the stirring shaft 22 is fixedly connected to the first driving wheel 241 and the second driving wheel 242; the first driving wheel 241 and the second driving wheel 242 are connected to the driven wheel 243 by meshing teeth, so that the driven wheel will not deviate; the rotation of the stirring shaft 22 drives the driving wheel to rotate; the rotation of the driving wheel drives the driven wheel 243 to rotate; and thus drives the first horizontal rotating shaft 23 to rotate longitudinally.

[0026] Furthermore, the inner cavity 111 is provided with a protective sleeve 25 that cooperates with the transmission component 24 to prevent the transmission component from contacting fly ash and to prevent ash accumulation from clogging and affecting rotation.

[0027] Furthermore, the inner cavity 111 of the microwave heating cavity 11 is a quartz tubular structure with a diameter of 0.5m to 1m, a height of 1m to 5m, a wall thickness of 10mm to 30mm, and a distance of 5-30cm between the inner cavity 111 and the outer cavity 112 to ensure uniform distribution of microwave field energy.

[0028] Furthermore, the number of first horizontal rotation shafts 23 per layer is set to multiple sets, and the number of layers of the first horizontal rotation shafts 23 is set to multiple; the number of bottom horizontal rotation shafts 29 is set to multiple sets.

[0029] Furthermore, the stirring blade 26 is one or more combinations of multiple rhombuses, quadrilaterals, triangles, and circles. The middle of the stirring blade 26 is hollow, and the bottom horizontal rotating shaft 29 is one of the following shapes: serrated, rhomboid, quadrilateral, triangular, or circular, which reduces the stirring resistance.

[0030] Furthermore, the microwave heating cavity 11 includes: an inner cavity 111 and an outer cavity 112, with a cover 113 on its top; a waveguide 114 symmetrical to the outside of the outer cavity 112; and a magnetron 115 disposed on one side of the waveguide 114.

[0031] Furthermore, a thermocouple 116 is provided on the outer side of the outer cavity 112, which is divided into three parts: upper, middle and lower. The wiring terminals of the thermocouple 116 are located on the outer side of the outer cavity 112, and the temperature measuring end of the thermocouple 116 is located on the outer wall of the inner cavity 111. The wiring terminals of the thermocouple 116 are electrically connected to the temperature control device 117.

[0032] Specifically, the electromagnetic waves generated by the magnetron 115 are transmitted through the waveguide 114 to the space between the inner cavity 111 and the outer cavity 112, and then diffuse. The diffused microwaves penetrate the quartz tube and enter the inner cavity 111 to heat the fly ash from the municipal solid waste incineration. The rotating scraper 28 refracts or reflects the penetrating microwaves, further dispersing them and avoiding high concentration of microwave field energy. This achieves a uniform distribution of microwave field energy, thereby ensuring the uniformity of microwave heating of the fly ash. Specifically, the temperature difference between the thermocouple 116 (middle) and the thermocouple 116 (bottom) is less than or equal to 2℃.

[0033] Specifically, a heating temperature is set by the temperature control device 117. After fly ash is added to the inner cavity, microwave heating and stirring motor 21 are started to begin microwave heating. Once the temperature measured by thermocouple 116 reaches the set temperature, it is fed back to the temperature control device 117, which then stops heating through program control. When the temperature of thermocouple 116 drops to 5°C below the set temperature, it is fed back to the temperature control device again, and microwave heating is started again through program control to ensure that the temperature of fly ash in the inner cavity 111 is maintained at the set temperature.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism, comprising a heating component (1), wherein the heating component (1) comprises: The microwave heating cavity (11) is provided with an inner cavity (111) and an outer cavity (112), and a feed inlet (12) is provided at its top. The base (13) is located at the bottom outer side of the microwave heating cavity (11); A hydraulic unloading valve (14) is located on the outer bottom of the base (13); The unloading hopper (15) is located at the bottom of the hydraulic unloading valve (14); A cooling conveying spiral (16) is disposed at the bottom of the microwave heating cavity (11); The feature is that a stirring assembly (2) is provided inside the inner cavity (111), and the stirring assembly (2) includes: A stirring motor (21) is fixed to the top of the microwave heating cavity (11) and located on one side of the feed inlet (12); A stirring shaft (22) is disposed at the output end of the stirring motor (21) and located inside the inner cavity (111); The first horizontal rotation axis (23) is symmetrical about the outside of the stirring axis (22); A transmission component (24) is disposed between the stirring shaft (22) and the first horizontal rotating shaft (23). The outer side of the stirring shaft (22) is symmetrically provided with protective sleeves (25) that cooperate with the transmission component (24) and the first horizontal rotating shaft (23). The stirring blades (26) are symmetrically fixed to the outside of the first horizontal rotating shaft (23); The second horizontal rotating shaft (27) is symmetrical to the outside of the stirring shaft (22) and is located below the first horizontal rotating shaft (23); The scraper (28) is fixed to one end of the second horizontal rotating shaft (27) and located on the inner wall of the microwave heating cavity (111); A bottom horizontal rotating shaft (29) is located at the bottom of the stirring shaft (22); The bottom stirring blades (291) are symmetrically fixed to the outside of the bottom horizontal rotating shaft (29).

2. The microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 1, characterized in that, The transmission component (24) includes: The first drive wheel (241) is symmetrically fixed to the outside of the stirring shaft (22); The second driving wheel (242) is symmetrically fixed to the outside of the stirring shaft (22) and located below the first driving wheel (241). One end of the first horizontal rotating shaft (23) is provided with a driven wheel (243) that cooperates with the first driving wheel (241) and the second driving wheel (242).

3. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 2, characterized in that, The inner cavity (111) is provided with a protective sleeve (25) that cooperates with the transmission component (24).

4. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 1, characterized in that, The inner cavity (111) of the microwave heating cavity (11) is a quartz tubular structure with a diameter of 0.5m to 1m, a height of 1m to 5m, and a wall thickness of 10mm to 30mm.

5. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 1, characterized in that, The number of the first horizontal rotating shaft (23) per layer is set to multiple sets; the number of the bottom horizontal rotating shaft is set to multiple sets.

6. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 1, characterized in that, The stirring blade (26) is one or more combinations of multiple rhombuses, multiple quadrilaterals, multiple triangles, and multiple circles. The middle of the stirring blade (26) is hollow. The bottom horizontal rotating shaft (29) is one of the following shapes: sawtooth, rhombus, quadrilateral, triangle, and circle.

7. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 1, characterized in that, The microwave heating cavity (11) includes: The inner cavity (111) and the outer cavity (112) are provided with a cover (113) on their tops; Waveguide (114), symmetrical about the outside of the external cavity (112); A magnetron (115) is disposed on one side of the waveguide (114).

8. A microwave heating device for municipal solid waste incineration fly ash with a homogenization mechanism according to claim 7, characterized in that, A thermocouple (116) is provided on the outside of the outer cavity (112). The wiring terminal of the thermocouple (116) is located on the outside of the outer cavity (112), and the temperature measuring end of the thermocouple (116) is located on the outer wall of the inner cavity (111). The wiring terminal of the thermocouple (116) is electrically connected to the temperature control device (117).

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