Multi-layer three-dimensional garbage fly ash treatment device based on asphalt medium

Abstract

The invention discloses a garbage fly ash multi-layer three-dimensional treatment device based on an asphalt medium, and belongs to the technical field of garbage fly ash treatment. The falling disposal unit is arranged above the tank body; the rotating treatment mechanism is positioned below the falling treatment unit; the rotating treatment mechanism is arranged on the tank body, the stirring treatment mechanism is positioned below the rotating treatment mechanism, the cooling treatment mechanism is arranged below the stirring treatment mechanism, and the basic part is arranged on the tank body. Fly ash falling from the garbage fly ash storage tank at the top passes through the falling disposal unit, the rotating disposal mechanism, the stirring disposal mechanism and the cooling disposal mechanism, asphalt is sprayed from different angles and different directions to wrap the fly ash, and interactive mixing of the asphalt and the fly ash is achieved through the multiple mixing assemblies. The heavy metal leaching concentration of the fly ash is remarkably reduced, the heavy metal leaching inhibition rate and the dispersity of the fly ash in asphalt are improved, and finally the treated garbage fly ash-asphalt material is collected by the material storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of garbage fly ash disposal, and in particular to a multi-layer three-dimensional garbage fly ash disposal device based on asphalt medium. Background Art

[0002] Fly ash is a fine particle produced during the incineration of municipal solid waste, mainly composed of inorganic salts, heavy metals (such as lead, cadmium, mercury) and organic pollutants (such as dioxins). Due to its fine particles and large specific surface area, the heavy metals and organic pollutants in fly ash have high mobility and biological toxicity, posing a serious threat to the environment and human health.

[0003] The existing garbage fly ash harmless disposal mainly uses cement or chelating agent and other materials to solidify the fly ash and achieve harmless treatment. The solidification process mainly uses a mixing solidification device, that is, cement or chelating agent is mixed with fly ash through stirring, mixing and other processes to form a solidified body. However, the existing garbage fly ash stirring, mixing and solidification device has the following disadvantages: After the fly ash and the solidifying medium are interactively mixed, the fly ash has a poor dispersion problem inside the solidifying agent, and under the influence of external factors, the fly ash is prone to heavy metal dissolution and infiltration problems; the existing stirring and mixing solidifying devices mostly use simple stirring and mixing, and the solidifying medium's coating of the fly ash is basically a mixed and interactive single-layer coating, and the risk of dissolution and infiltration is prone to occur in the weak areas of the coating. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is that fly ash has a poor dispersion problem inside the curing agent, and the coating of the fly ash by the curing medium is basically a mixed and interactive single-layer coating, and the risk of dissolution and infiltration is prone to occur in the weak area of ​​the coating.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium, which comprises the following steps: Tank; A drop disposal unit is arranged above the tank body, the drop disposal unit comprises a bottom plate, an oleophobic coating arranged on the surface of the bottom plate, an asphalt sprayer arranged on the inner wall of the tank body, and a baffle arranged at the lower end of the bottom plate; the drop disposal unit is a spiral structure, which achieves the purpose of extending the falling time of the garbage fly ash-asphalt material, and prolonging the disposal time and space; A rotating treatment mechanism located below the falling treatment unit, the rotating treatment mechanism comprising a rotating barrel located in the middle of the tank body, an automatic spray head located above the rotating barrel, an air blowing mechanism arranged on the side of the rotating barrel, and a chassis installed below the rotating barrel; A stirring treatment mechanism is located below the rotating treatment mechanism, a cooling treatment mechanism is arranged below the stirring treatment mechanism, and a base member is arranged on the tank body.

[0007] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the bottom inner wall of the rotating barrel is provided with a plurality of protrusions, valves are opened between the protrusions, and a first valve is arranged at the bottom of the rotating barrel.

[0008] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the air blowing mechanism includes an air inlet opened on the inner wall of the tank body, a ventilation pipe connected to the air inlet, and an air outlet connected to the other end of the ventilation pipe; The air blowing mechanism also includes a volute disposed in the middle of the ventilation pipe; An impeller and a bearing connected to the impeller are arranged inside the volute.

[0009] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, wherein: a plurality of air ducts are opened inside the chassis, and access ports are reserved on the surface of the chassis; Wherein, the air guide pipe is connected to the air outlet.

[0010] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the stirring disposal mechanism includes a stirring paddle, a connecting pipe arranged on the side of the stirring paddle, an infrared heater located above the stirring paddle, and a second valve arranged below between the stirring paddles; A disc is arranged at the inner end of the stirring paddle, and the inside of the disc is fixedly connected to the stirring shaft.

[0011] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the cooling disposal mechanism includes a cooling tank arranged below the tank body, a stirring member located above the cooling tank, an asphalt spraying pipe opened on the side of the stirring member, and a liquid nitrogen cooling chamber located outside the cooling tank. The cooling disposal mechanism also includes a delivery port opened on the side of the liquid nitrogen cooling chamber, and a third valve located at the bottom of the cooling tank.

[0012] As a preferred solution of the asphalt medium-based multi-layer three-dimensional disposal device for garbage fly ash described in the present invention, the stirring element includes a rotating paddle arranged on the upper side of the interior of the cooling tank close to the second valve, a connecting shaft for connecting the rotating paddle, and an electric motor arranged on the surface of the cooling tank.

[0013] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the base member includes a stirring device, an asphalt storage chamber located on the side of the upper end of the tank body, and a garbage fly ash storage tank at the upper end of the tank body; The base member also includes an asphalt delivery pipe connected below the asphalt storage chamber, and a material storage tank located at the lower end of the tank body.

[0014] As a preferred solution of the multi-layer three-dimensional disposal device of garbage fly ash based on asphalt medium described in the present invention, wherein: a fourth valve is arranged at the bottom of the garbage fly ash storage tank, and a garbage fly ash feed port is opened above the garbage fly ash storage tank; Wherein, the bottom surface of the garbage fly ash storage tank is inclined; An asphalt feed port is reserved on the outer side of the asphalt storage chamber, a fifth valve is arranged between the asphalt storage chamber and the asphalt delivery pipe, and a sixth valve is arranged between the asphalt storage chamber and the automatic spray head.

[0015] As a preferred solution of the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium described in the present invention, the asphalt delivery pipe is connected to the stirring disposal mechanism through a sixth valve.

[0016] Beneficial effects of the present invention: The device passes the fly ash dropped from the top garbage fly ash storage tank through a falling disposal unit, a rotating disposal mechanism, a stirring disposal mechanism and a cooling disposal mechanism, sprays asphalt-coated fly ash from different angles and directions and realizes interactive mixing of asphalt and fly ash through multiple mixing components, thereby significantly reducing the heavy metal leaching concentration of fly ash, improving the heavy metal leaching inhibition rate and the dispersibility of fly ash in asphalt, and finally the material storage tank collects the disposed garbage fly ash-asphalt material. The disposed garbage fly ash-asphalt material also has a higher potential for resource utilization, and can be used in road construction, building fillers and other fields to achieve efficient utilization of waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic cross-sectional view of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0019] Figure 2A schematic diagram of the structure of a falling disposal unit of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0020] Figure 3 A schematic diagram of the chassis structure of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0021] Figure 4 A top view of a rotating disposal mechanism of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0022] Figure 5 A structural diagram of the blowing mechanism of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0023] Figure 6 A top view of a stirring and disposal mechanism of a multi-layer three-dimensional disposal device for fly ash based on asphalt medium provided in one embodiment of the present invention.

[0024] Figure 7 A top view of a cooling treatment mechanism of a multi-layer three-dimensional treatment device for fly ash based on asphalt medium provided in one embodiment of the present invention.

[0025] Figure 8 A structural diagram of a stirring element of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided in one embodiment of the present invention.

[0026] Among them, 1. tank body; 2. drop disposal unit; 21. bottom plate; 22. oleophobic coating; 23. asphalt sprayer; 24. baffle; 3. rotating disposal mechanism; 31. rotating barrel; 311. bump; 312. valve; 313. first valve; 32. automatic nozzle; 33. blowing mechanism; 331. air inlet; 332. air outlet; 333. ventilation pipe; 334. volute; 3341. impeller; 3342. bearing; 34. chassis; 341. air guide pipe; 342. access port; 4. stirring disposal mechanism; 41. stirring paddle; 411. stirring shaft; 412. disc; 42. connecting pipe ; 43. Infrared heater; 44. Second valve; 5. Cooling disposal mechanism; 51. Cooling tank; 52. Stirring member; 521. Rotating paddle; 522. Connecting shaft; 523. Motor; 53. Asphalt spraying pipe; 54. Liquid nitrogen cooling chamber; 55. Delivery port; 56. Third valve; 6. Basic member; 61. Stirring device; 62. Asphalt storage chamber; 621. Asphalt feed port; 622. Fifth valve; 623. Sixth valve; 63. Garbage fly ash storage tank; 631. Fourth valve; 632. Garbage fly ash feed port; 64. Asphalt delivery pipe; 641. Sixth valve; 65. Material storage tank. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0028] Example 1, reference Figure 1 to Figure 8 , which is the first embodiment of the present invention, provides a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium, and a falling disposal unit 2 is connected to the bottom of the garbage fly ash storage tank 63, and the falling disposal unit 2 is a spiral structure, and a rotating disposal mechanism 3 is installed below the falling disposal unit 2.

[0029] The falling disposal unit 2 preliminarily disposes of the garbage fly ash, and causes the garbage fly ash-asphalt material to spirally fall from the upper part of the falling disposal unit 2 to flow into the bottom through the action of gravity. The garbage fly ash-asphalt material will be intercepted by the baffle 24 and fall into the rotating disposal mechanism 3, and further mix the garbage fly ash and asphalt, thereby avoiding the initial mixing of asphalt and garbage fly ash in the falling disposal unit 2, and the heavy metals in the garbage fly ash cannot be fully disposed of and sealed.

[0030] A group of asphalt sprayers 23 are installed on the side of the drop disposal unit 2. The asphalt sprayers 23 and the bottom plate 21 are fixedly connected to the tank body 1, so that the bottom plate 21 is directly connected to the tank body 1. The bottom plate 21 is circular when viewed from above. A heating rod is set in the bottom plate 21. When heated, the heat is directly transferred to the bottom plate 21 and the asphalt to promote the flow of the asphalt. The material of the heating rod is a ceramic heating element, which has the advantages of rapid heating, high thermal efficiency and long service life, and can adapt to frequent heating and cooling processes. The surface of the bottom plate 21 is covered with a layer of oleophobic coating 22. The oleophobic coating 22 is made of polytetrafluoroethylene (PTFE) material. PTFE has excellent oleophobic properties and chemical stability, can effectively prevent the adhesion of asphalt and oil substances, and has good high temperature resistance and corrosion resistance. The low friction coefficient of the oleophobic coating 22 can also reduce the frictional resistance of the mixture on the base plate, improve the operating efficiency of the device, and protect the base plate 21 from chemical corrosion and mechanical wear, extending the service life of the device, so that the asphalt and garbage fly ash mixture can smoothly reach the rotating disposal mechanism 3 under the action of gravity.

[0031] Preferably, a circle of asphalt storage chamber 62 is welded on the outer edge of the falling disposal unit 2, and the asphalt sprayer 23 obtains asphalt through the asphalt storage chamber 62 and sprays it to the falling disposal unit 2. An electric heating plate is set on the inner wall of the asphalt storage chamber 62 to heat the asphalt, and the material of the electric heating plate is stainless steel, which is not easily corroded by asphalt and has high high temperature resistance. A plurality of smaller heating plates are selected and installed in combination at different positions of the inner wall. The top of the falling disposal unit 2 is connected to the garbage fly ash storage tank 63, and a fourth valve 631 is provided at the bottom of the garbage fly ash storage tank 63. The garbage fly ash in the garbage fly ash storage tank 63 is passed into the falling disposal unit 2 through the fourth valve 631. The bottom surface of the garbage fly ash storage tank 63 is inclined, and a layer of oleophobic coating is provided on the surface of the garbage fly ash storage tank 63, so that the garbage fly ash can fall from the garbage fly ash storage tank 63 into the falling disposal unit 2.

[0032] Better, such as Figure 1 , Figure 3 , Figure 4 as well as Figure 5As shown, the rotating treatment mechanism 3 is surrounded by an asphalt delivery pipe 64 connected to the asphalt storage chamber 62. The asphalt delivery pipe 64 delivers the asphalt in the asphalt storage chamber 62 to the mixing treatment mechanism 4 to further treat the heavy metals in the garbage fly ash. Ventilation pipes 333 are welded to the parts connected to the tank body 1 on both sides of the rotating treatment mechanism 3. The gas is passed into the air guide pipe 341 in the rotating treatment mechanism 3 through the air blowing mechanism 33. The air blowing mechanism 33 uses an impeller 3341 made of high-strength engineering plastics and a volute 334 made of stainless steel. The air blowing mechanism 33 is arranged on the side of the rotating treatment mechanism 3, and provides a stable airflow through the air inlet 331 and the air outlet 332 to ensure the uniform distribution of the garbage fly ash-asphalt material in the rotating barrel 31. Engineering plastics have good corrosion resistance and mechanical strength, while stainless steel has good high temperature resistance and corrosion resistance. The air guide pipe 341 ventilates the gas to the rotating barrel 31 through the valve 312 at the bottom of the rotating barrel 31, so as to spray the garbage fly ash at the bottom of the rotating barrel 31 to the upper layer, and cooperate with the automatic nozzle 32 to further interactively mix and dispose of the heavy metals in the garbage fly ash. The bottom of the rotating barrel 31 is also provided with 8 protrusions 311, and the protrusions 311 and the valves 312 are arranged alternately. The protrusions 311 are provided with the same heating rods as those in the above-mentioned bottom plate 21 to heat the garbage fly ash-asphalt material in the rotating barrel 31. The existence of the protrusions 311 has a certain stirring effect and can increase the surface area of ​​the asphalt and garbage fly ash mixture, so that the automatic nozzle 32 can better dispose of the heavy metals in the sealed garbage fly ash. The automatic nozzle 32 is made of stainless steel. Stainless steel has good corrosion resistance and mechanical strength, and can withstand the spraying of high-temperature asphalt and long-term use. The heating cables are disposed in the inner wall of the rotating barrel 31 in a spiral arrangement. When the rotating barrel 31 rotates, the heating cables can evenly provide heat to the rotating barrel 31 and the garbage fly ash-asphalt material inside.

[0033] Preferably, a chassis 34 is provided under the rotating barrel 31, and the chassis 34 is fixedly connected to the tank body 1 on all sides. Four inlets 342 are provided at the connection to deliver the garbage fly ash-asphalt material in the rotating barrel 31 into the mixing and disposal mechanism 4. When the chassis 34 connected to the tank body 1 near the inlet 342 is close to the inlet 342, its height is inclined from high to low toward the inlet 342 so that the garbage fly ash-asphalt material can better flow to the mixing and disposal mechanism 4.

[0034] When in use, the device is driven by the stirring device 61 to rotate the stirring shaft 411, thereby rotating the rotating barrel 31 in the rotating disposal mechanism 3, and cooperating with the automatic nozzle 32 to complete the disposal and sealing of heavy metals in the garbage fly ash. During the rotation of the rotating barrel 31, the automatic nozzle 32 will continue to spray, and under the action of the blowing mechanism 33, the valve 312 at the bottom will open, and the garbage fly ash-asphalt material at the bottom will be sprayed to the upper layer to receive the spraying and disposal of the automatic nozzle 32, so as to ensure that the garbage fly ash that has not been fully disposed of in the spiral falling disposal unit 2 is further disposed of and sealed. In addition, after the rotation disposal is completed, the first valve 313 set in the rotating barrel 31 will open, so that the garbage fly ash-asphalt material flows to the chassis 34 below the rotating barrel 31, and then flows along the chassis 34 through the inlet 342 to the stirring disposal mechanism 4 below.

[0035] Embodiment 2, as Figure 6 As shown, the bottom of the stirring shaft 411 is connected to the disc 412, and four stirring paddles 41 are arranged outside the disc 412. Four groups of connecting pipes 42 are arranged outside the stirring paddles 41, so that the garbage fly ash-asphalt material in the rotating disposal mechanism 3 can flow into the stirring disposal mechanism 4 for further disposal. The four groups of connecting pipes 42 can cooperate with the asphalt conveying pipe 64. When the garbage fly ash-asphalt material passes into the connecting pipe 42, it is further rushed into the stirring disposal mechanism 4 for further disposal and sealing. The heating cable is arranged in a spiral shape at the bottom of the stirring disposal mechanism 4, so that the stirring disposal mechanism 4 heats the asphalt while stirring to prevent the asphalt from cooling and solidifying. The heating element of the infrared heater 43 above the stirring paddle 41 is a quartz tube heating element, which has a high heating efficiency and a stable infrared emissivity. It heats the asphalt during the stirring process to keep the asphalt in good fluidity. A second valve 44 is arranged at the bottom of the stirring disposal mechanism 4, and the garbage fly ash-asphalt material after stirring and disposal can be sent to the cooling disposal mechanism 5. Two stirring members 52 are arranged on the top of the cooling and disposal mechanism 5 to throw the garbage fly ash-asphalt material flowing out of the stirring and disposal mechanism 4 into the cooling tanks 51 around it.

[0036] like Figure 7 As shown, the outer wall of the cooling tank 51 is connected to a liquid nitrogen cooling chamber 54, which is made of high-strength aluminum alloy. The liquid nitrogen cooling chamber 54 is arranged outside the cooling tank 51, and the temperature of the garbage fly ash-asphalt material can be quickly reduced through the rapid cooling effect of liquid nitrogen, ensuring its rapid solidification. Figure 8 As shown, driven by the motor 523, the connecting shaft 522 rotates to drive the rotating paddle 521 to rotate, thereby subjecting the garbage fly ash-asphalt material dropped from the mixing and disposal mechanism 4 to final mixing and disposal. Two asphalt spraying pipes 53 are arranged on both sides of the mixing element 52, and a third valve 56 is arranged at the bottom of the cooling tank 51. Finally, the garbage fly ash-asphalt material reaches the material storage tank 65 through the third valve 56.

[0037] When in use, after interactive mixing with the garbage fly ash through the falling disposal unit 2 and the rotating disposal mechanism 3, the garbage fly ash-asphalt material flows down from the connecting pipe 42, and at the same time, the sixth valve 641 in the asphalt delivery pipe 64 is opened, and asphalt rushes out from the bottom of the asphalt delivery pipe 64, and the garbage fly ash-asphalt material is rushed into the stirring disposal mechanism 4 for stirring disposal. After the stirring is completed, the second valve 44 at the bottom of the stirring disposal mechanism 4 is opened, and the garbage fly ash-asphalt material flows into the cooling disposal mechanism 5. Two asphalt spraying pipes 53 are arranged on both sides of the stirring member 52, and asphalt is sprayed through the asphalt spraying pipes 53. While the stirring member 52 throws the garbage fly ash-asphalt material to the cooling tank 51, the asphalt spraying pipe 53 sprays asphalt for the final spraying disposal. Finally, under the action of the liquid nitrogen cooling chamber 54, the garbage fly ash-asphalt material in the cooling tank 51 is cooled and condensed into blocks. After the cooling treatment is completed, the third valve 56 at the bottom of the cooling treatment mechanism 5 is opened, and the garbage fly ash-asphalt material falls into the material storage tank 65. After the material storage tank 65 is full, the external sliding door is opened to take out the material storage tank 65.

[0038] Example 3 is the fourth example of the present invention. A certain amount of bag fly ash from a waste incineration power plant was taken to determine its basic components and heavy metal content. After the fly ash was treated by the multi-layer three-dimensional treatment device for waste fly ash based on asphalt medium of the present invention, the waste fly ash-asphalt material after multiple three-dimensional treatment was taken out from the waste fly ash-asphalt material storage tank, and a 40mm×40mm×50mm test block was made to measure the heavy metal leaching concentration. The inhibition rate of heavy metal leaching of waste fly ash by the device was calculated based on the heavy metal leaching concentration of the waste fly ash before and after treatment.

[0039] Comparative Example 1 The fly ash was solidified by cement, and the inhibition rate of heavy metal leaching from fly ash was calculated by the heavy metal leaching concentration of fly ash before and after cement solidification. The fly ash was derived from bag fly ash from a waste incineration power plant in my country, and its basic composition and heavy metal content were determined. The cement type was 42.5# ordinary Portland cement. 200g of cement was added to 1000g of fly ash and stirred in a mixing pot. The fly ash was solidified by cement and injected into a mold with a size of 40mm×40mm×50mm to make a test block. After vibrating and forming on a vibration table, it was cured for 28 days under standard indoor curing conditions (the relative humidity of the curing environment was maintained at above 95%, and the temperature was maintained at 20℃±2℃).

[0040] Comparative Example 2 Asphalt was used to solidify the fly ash, and the inhibition rate of asphalt on the heavy metal leaching of the fly ash was calculated by the heavy metal leaching concentration of the fly ash before and after asphalt solidification. The fly ash was derived from the bag fly ash of a waste incineration power plant in my country, and its basic composition and heavy metal content were determined. The asphalt type was AH-70 heavy traffic road asphalt. 600g of asphalt was added to 1000g of fly ash. An asphalt mixing pot was used with a mixing temperature of 160℃. The asphalt and fly ash were fully stirred and mixed for 3 minutes. Finally, the fly ash-asphalt mortar was poured into a 40mm×40mm×50mm mold to make a test block.

[0041] Comparative Example 3 The fly ash was solidified by chelating agent, and the inhibition rate of heavy metal leaching of fly ash by chelating agent was calculated by the heavy metal leaching concentration of fly ash before and after solidification by chelating agent. The fly ash was derived from bag fly ash of a waste incineration power plant in Guangdong, and its basic components and heavy metal content were determined. The main component of the chelating agent is dimethyl dithiocarbamate. 40g of chelating agent was added to 1000g of fly ash. After the fly ash and chelating agent were fully mixed in a mixer for 10min (temperature controlled at 20-30℃), a test block of 40mm×40mm×50mm was made.

[0042] According to the "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method" (HJ / T300-2007), the heavy metal leaching concentrations of Pb, Cr, Cd, Ni, Cu and Zn in the original fly ash of Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3 were measured. The "Solid Waste Leaching Toxicity Leaching Method Sulfuric Acid Nitric Acid Method" (HJ / T 299-2007) was used to prepare samples and test the heavy metal leaching concentrations of the solidified test blocks in Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3, and the heavy metal leaching concentrations of different samples were obtained. The corresponding heavy metal leaching inhibition rate was calculated using the leaching concentration, where the heavy metal leaching inhibition rate = ( )×100%, C 前 is the heavy metal leaching concentration of fly ash before solidification, C 后 is the heavy metal leaching concentration of solidified fly ash. The test results are shown in Table 1 and Table 2 below: Table 1: Heavy metal leaching concentration of fly ash in Examples and Comparative Examples Table 2: Heavy metal leaching inhibition rate of fly ash in Examples and Comparative Examples According to Table 2, it can be seen that the inhibition rate of leaching of various heavy metal elements in the garbage fly ash of the test blocks prepared after treatment by the present device is significantly improved compared with the inhibition rate of heavy metal leaching in Comparative Example 1 (solidified by cement), Comparative Example 2 (solidified by asphalt) and Comparative Example 3 (solidified by chelating agent), and the average increase is 23.45%, 21.75% and 22.48% respectively. It can be seen that the multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium of the present invention can greatly reduce the leaching of heavy metals in garbage fly ash.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium, characterized by: include, Tank (1); A drop handling unit (2) is arranged above the tank body (1), the drop handling unit (2) comprising a bottom plate (21), an oleophobic coating (22) arranged on the surface of the bottom plate (21), an asphalt sprayer (23) arranged on the inner wall of the tank body (1), and a baffle (24) arranged at the lower end of the bottom plate (21); a rotating handling mechanism (3) located below the falling handling unit (2), the rotating handling mechanism (3) comprising a rotating barrel (31) located in the middle of the tank body (1), an automatic spray head (32) located above the rotating barrel (31), an air blowing mechanism (33) arranged on the side of the rotating barrel (31), and a chassis (34) installed below the rotating barrel (31); A stirring treatment mechanism (4) located below the rotating treatment mechanism (3), a cooling treatment mechanism (5) arranged below the stirring treatment mechanism (4), and a base member (6) arranged on the tank body (1).

2. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 1, characterized in that: The inner wall of the bottom of the rotating barrel (31) is provided with a plurality of protrusions (311), air valves (312) opened between the protrusions (311), and a first valve (313) provided at the bottom of the rotating barrel (31).

3. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 2, characterized in that: The air blowing mechanism (33) comprises an air inlet (331) provided on the inner wall of the tank body (1), a ventilation pipe (333) connected to the air inlet (331), and an air outlet (332) connected to the other end of the ventilation pipe (333); The air blowing mechanism (33) further comprises a volute (334) arranged in the middle of the ventilation pipe (333); An impeller (3341) and a bearing (3342) connected to the impeller (3341) are arranged inside the volute (334).

4. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 3, characterized in that: A plurality of air guide tubes (341) are provided inside the chassis (34), and an access port (342) is reserved on the surface of the chassis (34); Wherein, the air guide pipe (341) is connected to the air outlet (332).

5. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 4, characterized in that: The stirring mechanism (4) comprises a stirring paddle (41), a connecting pipe (42) arranged on the side of the stirring paddle (41), an infrared heater (43) located above the stirring paddle (41), and a second valve (44) arranged below between the stirring paddles (41); A disc (412) is provided at the inner end of the stirring paddle (41), and the interior of the disc (412) is fixedly connected to the stirring shaft (411).

6. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 5, characterized in that: The cooling treatment mechanism (5) comprises a cooling tank (51) arranged below the tank body (1), a stirring member (52) located above the cooling tank (51), an asphalt spraying pipe (53) opened on the side of the stirring member (52), and a liquid nitrogen cooling chamber (54) located outside the cooling tank (51). The cooling treatment mechanism (5) further comprises a delivery port (55) opened on the side of the liquid nitrogen cooling chamber (54), and a third valve (56) located at the bottom of the cooling tank (51).

7. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 6, characterized in that: The stirring member (52) comprises a rotating paddle (521) disposed on the upper side of the interior of the cooling tank (51) close to the second valve (44), a connecting shaft (522) for connecting the rotating paddle (521), and a motor (523) disposed on the surface of the cooling tank (51).

8. The multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 7, characterized in that: The base member (6) comprises a stirring device (61), an asphalt storage chamber (62) located on the side of the upper end of the tank body (1), and a garbage fly ash storage tank (63) at the upper end of the tank body (1); The base member (6) further comprises an asphalt delivery pipe (64) connected below the asphalt storage chamber (62), and a material storage tank (65) located at the lower end of the tank body (1).

9. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 8, characterized in that: A fourth valve (631) is provided at the bottom of the garbage fly ash storage tank (63), and a garbage fly ash feed inlet (632) is provided above the garbage fly ash storage tank (63); Wherein, the bottom surface of the garbage fly ash storage tank (63) is arranged to be inclined; An asphalt feed port (621) is reserved outside the asphalt storage chamber (62), a fifth valve (622) is provided between the asphalt storage chamber (62) and the asphalt delivery pipe (64), and a sixth valve (623) is provided between the asphalt storage chamber (62) and the automatic spray head (32).

10. A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium as claimed in claim 9, characterized in that: The asphalt delivery pipe (64) is connected to the stirring and disposal mechanism (4) via a sixth valve (641).

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