A multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium

Abstract

The present invention discloses a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium, which belongs to the technical field of garbage fly ash disposal, and comprises a tank body; a falling disposal unit arranged above the tank body; a rotating disposal mechanism located below the falling disposal unit; a stirring disposal mechanism located below the rotating disposal mechanism, a cooling disposal mechanism arranged below the stirring disposal mechanism, and a base member arranged on the tank body. In the present invention, the fly ash falling from the top of the garbage fly ash storage tank is sprayed with asphalt from different angles and directions through the falling disposal unit, the rotating disposal mechanism, the stirring disposal mechanism, and the cooling disposal mechanism, and the fly ash is coated with asphalt from different angles and directions, and the interactive mixing of asphalt and fly ash is achieved through multiple mixing components, which significantly reduces the heavy metal leaching concentration of the fly ash, improves the heavy metal leaching inhibition rate and the dispersibility of the fly ash in the asphalt, and finally the material storage tank collects the disposed garbage fly ash-asphalt material.

Description

Technical Field

[0001] The present invention relates to the technical field of waste fly ash disposal, and in particular to a multi-layer three-dimensional waste 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. It is primarily composed of inorganic salts, heavy metals (such as lead, cadmium, and mercury), and organic pollutants (such as dioxins). Due to its small size and large surface area, the heavy metals and organic pollutants in fly ash are highly mobile and biotoxic, posing a serious threat to the environment and human health.

[0003] Existing fly ash harmless disposal methods primarily use materials such as cement or chelating agents to solidify the fly ash and achieve harmless treatment. The solidification process primarily utilizes a mixing and solidification device, which mixes the cement or chelating agent with the fly ash through stirring and mixing processes to form a solidified body. However, existing fly ash mixing and solidification devices have the following disadvantages:

[0004] 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 external influences, the fly ash is prone to heavy metal dissolution and infiltration problems; the existing stirring and mixing solidification devices mostly use simple stirring and mixing, and the solidifying medium's wrapping of the fly ash is basically a mixed and interactive single-layer wrapping, and the risk of dissolution and infiltration is prone to occur in the weak areas of the wrapping. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is that fly ash has a poor dispersion problem inside the curing agent, and the solidifying medium's wrapping of the fly ash is basically a mixed and interactive single-layer wrapping, and the risk of dissolution and infiltration is prone to occur in the weak areas of the wrapping.

[0007] 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:

[0008] Tank;

[0009] A drop disposal unit is provided above the tank body, comprising 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 extends the falling time of the fly ash-asphalt material and prolongs the disposal time and space;

[0010] A rotating disposal mechanism located below the falling disposal unit, 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 provided on the side of the rotating barrel, and a chassis installed below the rotating barrel;

[0011] 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.

[0012] 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 provided at the bottom of the rotating barrel.

[0013] As a preferred embodiment of the asphalt medium-based multi-layer three-dimensional disposal device for fly ash of garbage described in the present invention, the air blowing mechanism includes an air inlet provided 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;

[0014] The air blowing mechanism further includes a volute disposed in the middle of the ventilation pipe;

[0015] An impeller and a bearing connected to the impeller are arranged inside the volute.

[0016] 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: multiple groups of air ducts are opened inside the chassis, and access ports are reserved on the surface of the chassis;

[0017] Wherein, the air guide pipe is connected to the air outlet.

[0018] As a preferred embodiment of the asphalt-based multi-layer three-dimensional disposal device for fly ash of garbage of the present invention, the stirring and disposal mechanism includes a stirring paddle, a connecting pipe provided on the side of the stirring paddle, an infrared heater located above the stirring paddle, and a second valve provided below and between the stirring paddles;

[0019] A disc is provided at the inner end of the stirring paddle, and the interior of the disc is fixedly connected to the stirring shaft.

[0020] 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.

[0021] As a preferred solution of the multi-layer three-dimensional disposal device for fly ash based on asphalt medium 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.

[0022] As a preferred embodiment of the asphalt medium-based multi-layer three-dimensional disposal device for garbage fly ash of 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;

[0023] The base member further 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.

[0024] As a preferred embodiment of the asphalt medium-based multi-layer three-dimensional waste fly ash disposal device of the present invention, a fourth valve is provided at the bottom of the waste fly ash storage tank, and a waste fly ash feed port is provided above the waste fly ash storage tank;

[0025] Wherein, the bottom surface of the garbage fly ash storage tank is inclined;

[0026] An asphalt feed port is reserved on the outer side of the asphalt storage chamber, a fifth valve is provided between the asphalt storage chamber and the asphalt delivery pipe, and a sixth valve is provided between the asphalt storage chamber and the automatic sprinkler.

[0027] 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.

[0028] The beneficial effects of the present invention are as follows: the device passes the fly ash falling 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 dispersion 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 higher resource utilization potential and can be used in road construction, building fillers and other fields to achieve efficient utilization of waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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 paying any creative work.

[0030] Figure 1 A schematic cross-sectional view of a multi-layer three-dimensional disposal device for fly ash based on asphalt medium provided in one embodiment of the present invention.

[0031] Figure 2 A schematic structural diagram of a falling disposal unit of a multi-layer three-dimensional disposal device for fly ash based on asphalt medium provided in one embodiment of the present invention.

[0032] 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.

[0033] Figure 4 A top view of the rotating 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.

[0034] Figure 5 This is a structural diagram of the blowing mechanism of a multi-layer three-dimensional disposal device for garbage fly ash based on asphalt medium provided by one embodiment of the present invention.

[0035] Figure 6 A top view of the 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.

[0036] Figure 7 A top view of the cooling mechanism of a multi-layer three-dimensional disposal device for fly ash based on asphalt medium provided in one embodiment of the present invention.

[0037] Figure 8This is a structural diagram of a stirring element of a multi-layer three-dimensional disposal device for fly ash based on asphalt medium provided by one embodiment of the present invention.

[0038] 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

[0039] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0040] Example 1, with reference to Figures 1 to 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, which is connected to the bottom of the garbage fly ash storage tank 63 through a falling disposal unit 2, and the falling disposal unit 2 is a spiral structure, and a rotating disposal mechanism 3 is installed below the falling disposal unit 2.

[0041] The falling disposal unit 2 preliminarily disposes of the fly ash, and causes the 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 fly ash-asphalt material will be intercepted by the baffle 24 and fall into the rotating disposal mechanism 3, and further mix the fly ash and asphalt, thereby avoiding the heavy metals in the fly ash from being fully disposed of and sealed due to the preliminary mixing of asphalt and fly ash in the falling disposal unit 2.

[0042] A set 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. During heating, heat is directly transferred to the bottom plate 21 and the asphalt, promoting 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). PTFE has excellent oleophobic properties and chemical stability, can effectively prevent the adhesion of asphalt and oily 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.

[0043] Preferably, a circle of asphalt storage chamber 62 is welded on the outer edge of the drop disposal unit 2, and the asphalt sprayer 23 obtains asphalt through the asphalt storage chamber 62 and sprays it onto the drop 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 on the inner wall. The top of the drop 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 drop 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 to facilitate the garbage fly ash from the garbage fly ash storage tank 63 to fall into the drop disposal unit 2.

[0044] Better, such as Figure 1 、 Figure 3 、 Figure 4 as well as Figure 5As shown, the rotating disposal mechanism 3 is surrounded by asphalt delivery pipes 64 connected to the asphalt storage chamber 62. The asphalt delivery pipes 64 transport the asphalt in the asphalt storage chamber 62 to the mixing disposal mechanism 4 for further treatment of heavy metals in the garbage fly ash. Ventilation pipes 333 are welded to the parts of the rotating disposal mechanism 3 connected to the tank body 1 on both sides. Gas is introduced into the air guide pipe 341 in the rotating disposal mechanism 3 through the blowing mechanism 33. The blowing mechanism 33 uses an impeller 3341 made of high-strength engineering plastic and a volute 334 made of stainless steel. The blowing mechanism 33 is set on the side of the rotating disposal 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 and 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 duct 341 ventilates the rotating drum 31 through the valve 312 at the bottom of the rotating drum 31, thereby spraying the fly ash at the bottom of the rotating drum 31 toward the upper layer. This, in conjunction with the automatic nozzle 32, further interacts and mixes the heavy metals in the fly ash. The rotating drum 31 also has eight bumps 311 at the bottom. These bumps 311 are staggered with the valves 312. The bumps 311 are equipped with heating rods, similar to those in the base plate 21, to heat the fly ash-asphalt material within the rotating drum 31. The presence of the bumps 311 provides a certain stirring effect and increases the surface area of the asphalt-fly ash mixture, allowing the automatic nozzle 32 to better dispose of the heavy metals trapped in the fly ash. The automatic nozzle 32 is made of stainless steel. Stainless steel has excellent corrosion resistance and mechanical strength, capable of withstanding high-temperature asphalt spraying and long-term use. The heating cables are set in the inner wall of the rotating barrel 31 and arranged in a spiral shape. 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.

[0045] 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. The chassis 34 connected to the tank body 1 near the inlet 342 is tilted from high to low toward the inlet 342 when approaching the inlet 342 so that the garbage fly ash-asphalt material can better flow to the mixing and disposal mechanism 4.

[0046] When in use, this 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 sprinkler 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 sprinkler 32 will continue to spray, and under the action of the blowing mechanism 33, the valve 312 at the bottom will open, spraying the garbage fly ash-asphalt material at the bottom to the upper layer to be sprayed and disposed by the automatic sprinkler 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 rotational disposal is completed, the first valve 313 set in the rotating barrel 31 will open, allowing the garbage fly ash-asphalt material to flow to the chassis 34 below the rotating barrel 31, and then flow along the chassis 34 through the inlet 342 to the stirring disposal mechanism 4 below.

[0047] Example 2, as Figure 6 As shown, the bottom of the stirring shaft 411 is connected to a disc 412. Four stirring paddles 41 are provided on the outside of the disc 412. Four sets of connecting pipes 42 are provided on the periphery of the stirring paddles 41 to facilitate the flow of the fly ash-asphalt material in the rotating disposal mechanism 3 into the stirring disposal mechanism 4 for further disposal. The four sets of connecting pipes 42 can cooperate with the asphalt conveying pipe 64. When the fly ash-asphalt material enters the connecting pipes 42, it is further rushed into the stirring disposal mechanism 4 for further disposal and sealing. A 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 heater, which has high heating efficiency and stable infrared emissivity. It heats the asphalt during the stirring process to maintain good fluidity. A second valve 44 is provided at the bottom of the stirring disposal mechanism 4 to convey the fly ash-asphalt material after stirring and disposal into the cooling disposal mechanism 5. Two stirring members 52 are provided 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.

[0048] 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 set outside the cooling tank 51. Through the rapid cooling effect of liquid nitrogen, the temperature of the garbage fly ash-asphalt material can be quickly reduced to ensure 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 provided on both sides of the stirring member 52, and a third valve 56 is provided 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.

[0049] During use, after interactive mixing with the fly ash through the falling disposal unit 2 and the rotating disposal mechanism 3, the fly ash-asphalt material flows down from the connecting pipe 42. At the same time, the sixth valve 641 in the asphalt delivery pipe 64 opens, and asphalt is flushed out from the bottom of the asphalt delivery pipe 64, flushing the fly ash-asphalt material into the mixing disposal mechanism 4 for mixing and disposal. After the mixing is completed, the second valve 44 at the bottom of the mixing disposal mechanism 4 opens, and the fly ash-asphalt material flows into the cooling disposal mechanism 5. Two asphalt spraying pipes 53 are provided on both sides of the stirring member 52, through which asphalt is sprayed. While the stirring member 52 throws the fly ash-asphalt material toward the cooling tank 51, the asphalt spraying pipes 53 spray asphalt for the final spraying treatment. Finally, under the action of the liquid nitrogen cooling chamber 54, the 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 and the material storage tank 65 is taken out.

[0050] Example 3, the fourth example of the present invention, measured a certain amount of bagged fly ash from a waste incineration power plant to determine its basic composition and heavy metal content. After treating the fly ash using the present invention's multi-layered, three-dimensional fly ash treatment device based on an asphalt medium, the fly ash-asphalt material, after undergoing the multi-layered, three-dimensional treatment, was removed from the fly ash-asphalt material storage tank and fabricated into 40 mm x 40 mm x 50 mm test blocks. The heavy metal leaching concentrations were then measured. The inhibition rate of heavy metal leaching from the fly ash by the device was calculated based on the heavy metal leaching concentrations before and after treatment.

[0051] Comparative Example 1

[0052] Cement was used to solidify fly ash, and the inhibition rate of heavy metal leaching from fly ash was calculated based on the heavy metal leaching concentrations before and after cement solidification. The fly ash was sourced from bagged fly ash from a waste incineration power plant in my country, and its basic composition and heavy metal content were determined. 42.5# ordinary Portland cement was used. 200g of cement was added to 1000g of fly ash and thoroughly mixed in a mixing pot. The cement-solidified fly ash was then poured into a 40mm x 40mm x 50mm mold to produce a test block. After being vibrated on a vibration table and formed, the blocks were cured indoors under standard curing conditions for 28 days (relative humidity maintained above 95% and temperature maintained at 20°C ± 2°C).

[0053] Comparative Example 2

[0054] Asphalt was used to solidify fly ash, and the inhibition rate of heavy metal leaching from fly ash was calculated based on the heavy metal leaching concentrations before and after asphalt solidification. The fly ash was sourced from bagged fly ash from a waste incineration power plant in my country, and its basic composition and heavy metal content were determined. AH-70 heavy-duty road asphalt was used. 600g of asphalt was added to 1000g of fly ash. The asphalt and fly ash were thoroughly mixed in an asphalt mixing kettle at 160°C for 3 minutes. The fly ash-asphalt mortar was then poured into a 40mm x 40mm x 50mm mold to form a test block.

[0055] Comparative Example 3

[0056] A chelating agent was used to solidify fly ash. The inhibition rate of heavy metal leaching from the fly ash was calculated based on the heavy metal leaching concentrations before and after chelating. The fly ash was sourced from bagged fly ash from a waste incineration power plant in Guangdong Province, and its basic composition and heavy metal content were determined. The chelating agent, primarily dimethyldithiocarbamate, was added to 1000g of fly ash. The fly ash and chelating agent were thoroughly mixed in a mixer for 10 minutes (temperature controlled at 20-30°C) before being formed into 40mm×40mm×50mm test blocks.

[0057] The heavy metal leaching concentrations of Pb, Cr, Cd, Ni, Cu and Zn in the raw fly ash of Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3 were determined according to the "Solid Waste Leaching Toxicity Leaching Method - Acetate Buffer Solution Method" (HJ / T300-2007). The solidified test blocks in Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3 were prepared and tested for heavy metal leaching concentrations using the "Solid Waste Leaching Toxicity Leaching Method - Sulfuric Acid and Nitric Acid Method" (HJ / T 299-2007), 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 concentration of heavy metal leaching from solidified fly ash. The test results are shown in Table 1 and Table 2 below:

[0058] Table 1: Heavy metal leaching concentrations of fly ash from examples and comparative examples

[0059]

[0060] Table 2: Heavy metal leaching inhibition rate of fly ash of examples and comparative examples

[0061]

[0062] 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 this 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), with the average increase being 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.

[0063] 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 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 fly ash based on asphalt medium, characterized by: include, Tank (1); A drop handling unit (2) is provided 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) provided on the inner wall of the tank body (1), and a baffle (24) provided at the lower end of the bottom plate (21); A rotating disposal mechanism (3) located below the falling disposal unit (2), the rotating disposal 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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 1, characterized in that: The bottom inner wall of the rotating barrel (31) is provided with a plurality of protrusions (311), an air valve (312) opened between the protrusions (311), and a first valve (313) provided at the bottom of the rotating barrel (31).

3. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to 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) communicating with 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 includes 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 provided inside the volute (334).

4. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 3, characterized in that: A plurality of air ducts (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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 4, characterized in that: The stirring mechanism (4) includes a stirring paddle (41), a connecting pipe (42) provided on the side of the stirring paddle (41), an infrared heater (43) located above the stirring paddle (41), and a second valve (44) provided 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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 5, characterized in that: The cooling treatment mechanism (5) includes 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) also includes 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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 6, characterized in that: The stirring member (52) includes a rotating paddle (521) arranged on the upper side of the interior of the cooling tank (51) near the second valve (44), a connecting shaft (522) for connecting the rotating paddle (521), and a motor (523) arranged on the surface of the cooling tank (51).

8. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 7, characterized in that: The base member (6) includes 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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 8, characterized in that: A fourth valve (631) is provided at the bottom of the waste fly ash storage tank (63), and a waste fly ash feed port (632) is provided above the waste fly ash storage tank (63); Wherein, the bottom surface of the garbage fly ash storage tank (63) is 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. The multi-layer three-dimensional disposal device for fly ash based on asphalt medium according to claim 9, characterized in that: The asphalt delivery pipe (64) is connected to the stirring and disposal mechanism (4) via a sixth valve (641).

Images