Resource Recycling System for Co-disposal of Municipal Solid Waste Incineration Fly Ash, Sludge and Biogas Residue

Abstract

The present application relates to a resource utilization system for the collaborative treatment of waste incineration fly ash, sludge and biogas residue, which comprises a mixed hydrothermal treatment device, a compression device, a pyrolysis device and a rotary kiln device connected in sequence; the mixed hydrothermal treatment device comprises a kettle body with an upper opening, a cover body for plugging the upper opening of the kettle body, a rotating cylinder, a rotating pipe, a heat transfer oil conveying assembly, a first driving assembly for driving the rotation of the rotating cylinder and a second driving assembly for driving the rotation of the rotating pipe, and the heat transfer oil conveying assembly is used for conveying heat transfer oil into the rotating pipe; an upper auger and a lower auger are respectively arranged at the upper and lower parts of the rotating pipe, a plurality of stirring pipes arranged along the radial direction of the rotating cylinder are arranged at the outer side part of the middle of the rotating cylinder, a diversion arc piece is arranged at one end of the stirring pipe located in the inner cavity of the rotating cylinder, a conical piece is arranged at the other end of the stirring pipe, and an annular discharge gap is arranged between the outer edge of the conical piece and the port of the stirring pipe. The present application can improve the hydrothermal treatment effect.

Description

Technical Field

[0001] The present application relates to the field of fly ash treatment technologies, and in particular to a resource utilization system for the collaborative disposal of municipal solid waste incineration fly ash, sludge, and biogas residue. Background Art

[0002] With the rapid increase in the number and scale of municipal solid waste incineration plants, the generation of municipal solid waste incineration fly ash has also increased rapidly. By 2020, the generation of fly ash in China has exceeded 10 million tons.

[0003] Currently, the main method is to landfill fly ash after cement solidification or stabilization with chelating agents. However, fly ash contains a high concentration of chlorine, which is likely to cause the solidified body to crack, reduce the structural strength, increase the permeability, and cannot contain the long-term leaching toxicity of heavy metals. Organic pollutants such as dioxins and furans have not been safely and effectively treated either.

[0004] Therefore, in the process of fly ash treatment, it is crucial to perform dechlorination and desalination, eliminate dioxins, and stabilize and solidify heavy metals.

[0005] The existing technology for fly ash treatment is as follows: first, mix fly ash with sludge and biogas residue to obtain a mixed slurry; perform hydrothermal treatment on the mixed slurry to obtain a hydrothermal treatment product; perform solid-liquid separation on the hydrothermal treatment product by means of pressure filtration to obtain a hydrothermally pressure-filtered solid; add biomass to the hydrothermally pressure-filtered solid to form a pyrolysis mixture, and pyrolyze the pyrolysis mixture to obtain a pyrolysis residue, which is landfilled as general solid waste or used as an inorganic material.

[0006] The existing hydrothermal treatment device includes a high-pressure reaction kettle and an internal stirring mechanism. During use, transfer the material mixture of sludge, biogas residue, and fly ash to the high-pressure reaction kettle. Before the reaction kettle is heated up, introduce an inert gas to form an inert atmosphere. During the reaction process, use electric heating for heating, and the stirring mechanism stirs the material, thereby completing the hydrothermal treatment reaction.

[0007] However, due to the large viscosity of the material mixture of sludge, biogas residue, and fly ash, it is difficult for the existing stirring mechanism to achieve uniform mixing of the mixture of sludge, biogas residue, and fly ash, resulting in a low hydrothermal treatment effect. Summary of the Invention

[0008] In order to improve the hydrothermal treatment effect, the present application provides a resource utilization system for the collaborative disposal of municipal solid waste incineration fly ash, sludge, and biogas residue.

[0009] The resource utilization system for the collaborative disposal of municipal solid waste incineration fly ash, sludge, and biogas residue provided by the present application adopts the following technical solutions:

[0010] A resource utilization system for the collaborative disposal of waste incineration fly ash, sludge and biogas residue, comprising a mixed hydrothermal treatment device, a compression device, a pyrolysis device and a rotary kiln device connected in sequence; the mixed hydrothermal treatment device includes a kettle body with an upper opening, a cover body for sealing the upper opening of the kettle body, a rotating cylinder, a rotating pipe, a heat transfer oil conveying component, a first driving component for driving the rotating cylinder to rotate and a second driving component for driving the rotating pipe to rotate. The rotating cylinder is coaxially arranged with the kettle body, and feeding ports are arranged at both the upper and lower ends of the rotating cylinder. The rotating pipe is coaxially arranged with the rotating cylinder, and the driving directions of the first driving component and the second driving component are opposite. The heat transfer oil conveying component is used for conveying heat transfer oil into the rotating pipe; an upper auger and a lower auger are respectively arranged at the upper and lower parts of the rotating pipe. The upper auger is used for conveying the materials in the upper part of the inner cavity of the kettle body into the rotating cylinder, and the lower auger is used for conveying the materials in the lower part of the inner cavity of the kettle body into the rotating cylinder. A plurality of stirring pipes arranged along the radial direction of the rotating cylinder are arranged at the outer side part of the middle of the rotating cylinder. The stirring pipes are communicated with the inner cavity of the rotating cylinder. A diversion arc piece is arranged at one end of the stirring pipe located in the inner cavity of the rotating cylinder, and a conical piece is arranged at the other end of the stirring pipe. The tip of the conical piece faces the middle of the stirring pipe, and an annular discharge gap is arranged between the outer edge of the conical piece and the port of the stirring pipe.

[0011] By adopting the above technical solution, during use, the materials are put into the kettle body through the upper opening of the kettle body, and then the cover body is covered. The rotating cylinder and the rotating pipe on the cover body enter the kettle body together. The kettle body is closed, and then the first driving component and the second driving component are started simultaneously. The rotating cylinder and the rotating pipe rotate in opposite directions. At this time, the rotating pipe drives the upper auger and the lower auger to rotate together, so as to convey the upper materials and the lower materials in the inner cavity of the kettle body to the middle position of the rotating cylinder for preliminary mixing. Moreover, under the action of the upper auger and the lower auger, the materials in the middle of the rotating cylinder have pressure, and the pressured materials will overflow into the stirring pipes in the middle of the rotating cylinder. During the rotation of the rotating cylinder, the diversion arc piece shovels the materials in the middle of the rotating cylinder into the stirring pipes. Then, under the dual action of pressure and centrifugal force, the materials in the stirring pipes move axially along the stirring pipes to the conical piece and are sprayed out under pressure from the discharge gap. The sprayed and diffused materials are secondarily mixed with the materials in the kettle body. At the same time, the stirring pipes rotate together with the rotating cylinder, and the stirring pipes can finally stir the secondarily mixed materials.

[0012] In this way, by setting the rotating cylinder, the rotating pipe, the upper auger, the lower auger, the stirring pipes and the arc-shaped cover, three cyclic actions of preliminary mixing, secondary mixing and final stirring of the materials can be carried out. Compared with the existing simple stirring, the mixing effect of the materials can be greatly improved, thereby improving the hydrothermal treatment reaction effect.

[0013] Furthermore, by conveying heat transfer oil into the rotating tube through the heat transfer oil conveying assembly, the rotating tube can be heated to heat the material in the core of the rotating cylinder, thereby improving the heating uniformity and further improving the hydrothermal treatment reaction effect.

[0014] Optionally, the stirring tubes are arranged at intervals along the axial direction of the rotating cylinder, the rotating cylinder is provided with a sleeve, the stirring tubes are connected to the sleeve in a radially sliding manner along the rotating cylinder, a return spring is provided between the rotating cylinder and the stirring tubes, and the return spring is used to force the stirring tubes to slide in a direction toward the axis of the rotating cylinder.

[0015] By adopting the above technical scheme, firstly, under the dual effects of pressure and centrifugal force, when the material in the stirring tube moves axially along the stirring tube to the conical part, the high-pressure material exerts pressure on the conical part, and the pressure forces the stirring tube to slide outward relative to the rotating cylinder, and the reset spring accumulates energy. Moreover, when the rotation speed of the rotating cylinder and the stirring tube is reduced, the centrifugal force is reduced, and the reset spring releases potential energy, forcing the stirring tube to slide inward relative to the rotating cylinder, thereby realizing intermittent reciprocating sliding of the stirring tube, thereby changing the injection and discharge position of the material, so as to facilitate uniform mixing with the materials in various parts of the kettle body.

[0016] Secondly, since the axial positions of the stirring tubes are different, the amounts of materials entering the stirring tubes are different, and therefore the mass of the materials in the stirring tubes is different, the centrifugal forces are different, and the telescopic displacements of the stirring tubes are different, so that the materials sprayed from the stirring tubes can be simultaneously diffused to the inside of the materials in various parts of the kettle body, thereby further improving the mixing uniformity.

[0017] Optionally, the elastic coefficients of the return springs corresponding to the stirring tubes are different.

[0018] By adopting the above technical solution, under the action of the same pressure and centrifugal force, the elastic coefficients of the return springs are different, and the telescopic displacements of the stirring tubes are different. Therefore, during the reciprocating telescopic process, each stirring tube will alternately move along the radial direction of the rotating cylinder, so that the materials sprayed by each stirring tube will intersect, thereby further improving the mixing effect.

[0019] Optionally, a first rotating joint is provided on the outer rotating sleeve of the rotating tube, and stirring blades corresponding to the stirring tubes are fixed on the outer peripheral surface of the first rotating joint, and the first rotating joint is used to transport the heat transfer oil in the rotating tube to the inside of the stirring blades.

[0020] By adopting the above technical solution, firstly, stirring blades are provided to stir the materials in the rotating cylinder to improve the stirring and mixing degree, and secondly, the heating of the stirring blades is provided to improve the hydrothermal treatment effect.

[0021] Optionally, the heat-conducting oil delivery assembly includes an inlet pipe, a return pipe, a delivery pump, and a solenoid valve. An oil inlet passage and an oil return passage are provided in the rotating pipe. The outlet of the oil inlet passage communicates with the inlet of the oil return passage. A second rotary joint is rotatably sleeved on the upper end of the rotating pipe. The inlet pipe communicates with the inlet of the oil inlet passage through the second rotary joint, and the return pipe communicates with the outlet of the oil return passage through the second rotary joint. The stirring blade includes a cylinder body, a telescopic sheet body, and a conical piston made of rubber material. One end of the cylinder body is fixed to the outside of the first rotary joint. The inner cavity of the cylinder body communicates with the oil return passage through the first rotary joint. The telescopic sheet body is slidably connected to the cylinder body. The conical piston is fixed to the end of the telescopic sheet body. The inner conical surface of the conical piston faces the stirring pipe. A driving spring is fixedly connected between the conical piston and the conical member. The conical member is made of an elastic material. A limiting support rod is fixed at the pipe orifice of the stirring pipe. The outer edge of the conical member abuts against the limiting support rod.

[0022] By adopting the above technical solution, first, the solenoid valve closes the return pipe, and the delivery pump injects heat-conducting oil into the rotating pipe. The heat-conducting oil will enter the cylinder body through the second rotary joint. The heat-conducting oil in the inner cavity of the cylinder body will push the telescopic sheet body towards the stirring pipe. At the same time, the conical piston moves towards the stirring pipe. During the movement of the conical piston, the material in the middle of the rotating cylinder is pushed into the stirring pipe, and the material in the stirring pipe is pressurized at the same time to increase the injection speed and diffusion range of the material in the stirring pipe.

[0023] Secondly, the delivery pump stops working, and the solenoid valve conducts the return pipe. At this time, there is no pressure in the cylinder body, and the driving spring releases its elastic potential energy. The conical piston moves away from the stirring pipe to the initial position, thereby realizing the reciprocating movement of the conical piston to achieve reciprocating pressurization.

[0024] Thirdly, during the movement of the conical piston, the driving spring is compressed, and the elastic force of the driving spring is applied to the middle of the conical member, forcing the conical member to move outwards. At this time, the limiting support rod abuts against the conical member to prevent the conical member from moving outwards. The conical member deforms, and the outer edge of the conical member expands outwards, and the discharge gap decreases, that is, at a certain pressure, the flow path decreases and the flow rate is faster, thereby increasing the injection speed and diffusion range of the material.

[0025] Optionally, the conical member includes a contact circular plate and a plurality of rubber sheets. A plurality of inclined support plates are integrally formed at the outer diameter of the contact circular plate. The support plates are uniformly arranged along the circumference of the contact circular plate. The two sides of the rubber sheet are respectively fixedly connected to the support plates on both sides.

[0026] By adopting the above technical solution, the support plates can deform and deflect relative to the contact circular plate, and the distance between adjacent support rods changes with the deformation, thereby realizing the elastic deformable characteristic of the conical member.

[0027] Optionally, a plurality of diversion grooves are provided on the surface of the rubber sheet and arranged radially along the conical member.

[0028] By adopting the above technical solution, the spraying direction of the material can be guided, so as to achieve a centralized mixing effect.

[0029] Optionally, a rotating rod is rotatably connected to the end of the stirring blade. The rotating rod is coaxially arranged with the stirring tube, and the end of the rotating rod is fixedly connected to the conical member; a plurality of paddle protrusions are arranged on the inner conical surface of the conical member and are evenly distributed in a circumferential direction.

[0030] By adopting the above technical solution, under the dual action of pressure and centrifugal force, when the material in the stirring tube moves axially along the stirring tube to the conical member, the high-pressure material exerts pressure on the conical member, and this pressure is converted into a driving force forcing the conical member to rotate by the paddle protrusions, so that the material can be sprayed out in an arc shape along the gap between adjacent paddle protrusions, thereby improving the diffusion uniformity of the material and thus improving the material mixing effect.

[0031] Optionally, the conical member is made of rubber material.

[0032] By adopting the above technical solution, according to different pressures, the deformation degree of the conical member is different, and the size of the discharge gap is also different, so that the flow rate and flow velocity of the material can be adaptively controlled.

[0033] Optionally, a compression spring is arranged on the inner conical surface of the conical member. The compression spring is arranged radially along the conical member, and both ends of the compression spring are fixedly connected to the outer edge of the conical member. The compression spring forces the outer edge of the conical member to abut against the inner wall of the stirring tube.

[0034] By adopting the above technical solution, by arranging the compression spring, the deformation recovery speed of the conical member can be improved, so as to reduce the occurrence of the situation that the conical member fails due to excessive deformation.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. By arranging the rotating cylinder body, the rotating tube, the upper auger, the lower auger, the stirring tube and the arc-shaped cover, three cyclic actions of preliminary mixing, secondary mixing and final stirring of the material can be carried out. Compared with the existing simple stirring, the material mixing effect can be greatly improved, thereby improving the hydrothermal treatment reaction effect;

[0037] 2. By arranging the sliding characteristics of the stirring tube and the return spring, and utilizing the pressure and centrifugal force received by the material, the intermittent reciprocating sliding of the stirring tube is realized, so as to change the spraying and discharging position of the material, so as to be uniformly mixed with the materials in each part of the kettle body;

[0038] 3. By setting the elastic coefficients of different return springs, the telescopic displacement amounts of each mixing tube are made different, so that during the reciprocating telescopic process of each mixing tube, an alternating movement in the radial direction of the rotating cylinder body occurs, thereby enabling the materials ejected by each mixing tube to form an intersection, and further improving the mixing effect;

[0039] 4. Through the pressurization of the heat-conducting oil, during the movement of the conical piston, the material in the middle of the rotating cylinder body is pushed into the mixing tube, and at the same time, the material in the mixing tube is pressurized to increase the ejection speed and diffusion range of the material in the mixing tube. Description of the Drawings

[0040] Figure 1 It is the process operation diagram of each device in Embodiment 1.

[0041] Figure 2 It is the cross-sectional view of the hybrid hydrothermal treatment device in Embodiment 1.

[0042] Figure 3 It is the partial cross-sectional view of the rotating tube in Embodiment 1.

[0043] Figure 4 It is the schematic diagram of the mixing tube in Embodiment 1.

[0044] Figure 5 It is Figure 2 The partial enlarged view at A in

[0045] Figure 6 It is the cross-sectional view of the hybrid hydrothermal treatment device in Embodiment 2.

[0046] Figure 7 It is Figure 6 The partial enlarged view at B in

[0047] Figure 8 It is the cross-sectional view of the hybrid hydrothermal treatment device in Embodiment 3.

[0048] Figure 9 It is the partial cross-sectional view of the rotating tube in Embodiment 3.

[0049] Figure 10 It is the cross-sectional view of the conical part in Embodiment 3.

[0050] Figure 11 It is the front view of the conical part in Embodiment 3.

[0051] Figure 12 It is the cross-sectional view of the hybrid hydrothermal treatment device in Embodiment 4.

[0052] Figure 13 It is the front view of the conical part in Embodiment 4.

[0053] Description of reference numerals: 1, rotating cylinder; 2, rotating pipe; 3, stirring pipe; 5, first driving assembly; 6, second driving assembly; 7, stirring blades; 10, kettle body; 101, discharge port; 11, connecting rod; 12, rotating pipe; 13, sleeve; 20, cover body; 201, perforation; 21, upper auger; 22, lower auger; 23, oil inlet channel; 24, oil return channel; 25, first rotary joint; 30, discharge gap; 31, guiding arc plate; 311, limiting support rod; 312, compression spring; 32, conical part; 321, abutting circular plate; 322, support plate; 323, rubber sheet; 324, guiding groove; 325, paddle protrusion; 33, connecting rod; 34, convex ring; 35, return spring; 61, fuel tank; 62, oil inlet pipe; 63, oil return pipe; 64, transfer pump; 65, solenoid valve; 66, second rotary joint; 71, cylinder block; 72, telescopic sheet body; 73, conical piston; 74, driving spring; 75, rotating rod. Detailed implementation manners

[0054] The following further elaborates on this application Figure 1-13 in conjunction with the attached drawings.

[0055] Embodiment 1 of this application discloses a resource utilization system for the collaborative treatment of municipal solid waste incineration fly ash, sludge, and biogas residue.

[0056] Referring to Figure 1 , the resource utilization system for the collaborative treatment of municipal solid waste incineration fly ash, sludge, and biogas residue includes a hybrid hydrothermal treatment device, a compression device, a pyrolysis device, and a rotary kiln device that are connected in sequence.

[0057] First, the preliminarily mixed material of fly ash, sludge, and biogas residue is put into the hybrid hydrothermal treatment device. During the hydrothermal treatment process, since the fly ash contains a high content of chlorides, mixing with the high-moisture sludge and biogas residue can efficiently leach out the high content of chlorides and soluble heavy metals in the fly ash. Moreover, the fly ash and the sludge and biogas residue are mixed at high temperature, which is conducive to wetting the fly ash and increasing the solubility of chlorides at the same time. The chlorides dissolved in the fly ash act as a dehydration conditioner for the sludge and biogas residue, changing the structure of the sludge and biogas residue colloid and destroying the stability of the colloid, so as to achieve the rapid breaking of the water-containing cells in the sludge and biogas residue and greatly improve the sludge dewatering efficiency.

[0058] Furthermore, during the hydrothermal process, the dechlorination reaction of dioxins in the fly ash will be promoted. At the same time, the inorganic components in the fly ash and the sludge and biogas residue further catalyze the hydrothermal degradation process of dioxins, realizing the efficient detoxification and decomposition of dioxin-like substances.

[0059] The material after hydrothermal treatment enters the compression device. The compression device can adopt a filter press to perform solid-liquid separation through pressure filtration to obtain hydrothermally filtered solids.

[0060] Then the filter press solid is put into a pyrolysis device at a pyrolysis temperature of 400-600 degrees Celsius, and the effect of free radicals in the biomass pyrolysis process and the curing performance of the pyrolysis porous carbon are utilized to further increase the residual content of heavy metal elements in the pyrolysis residue, achieve deep curing and detoxification of heavy metal elements, and greatly reduce the leaching of heavy metals in the pyrolysis residue. In this embodiment, tea residue is used as pyrolysis biomass.

[0061] The pyrolysis residue is put into a rotary kiln device for high-temperature sintering to obtain expanded clay clinker, which can be used to prepare microbial carbon source. In addition, during the high-temperature sintering process, dioxins in the pyrolysis residue can be effectively decomposed and heavy metals can be melted and solidified.

[0062] like Figure 2 As shown, the mixed hydrothermal treatment device includes a kettle body 10 with an upper opening, a cover body 20 for sealing the upper opening of the kettle body 10, a rotating cylinder 1, a rotating tube 2, a heat transfer oil delivery component, a first driving component 5 for driving the rotating cylinder 1 to rotate, and a second driving component 6 for driving the rotating tube 2 to rotate.

[0063] The lower end of the kettle body 10 is provided with a discharge port 101, the rotating cylinder 1 is coaxially arranged with the kettle body 10, and the upper and lower ends of the rotating cylinder 1 are provided with feed ports. The upper end of the rotating cylinder 1 is fixedly connected with a rotating tube 12 through a connecting rod 11. The rotating tube 12 passes through a through hole 201 on the cover body 20, and the rotating tube 12 is rotatably connected to the cover body 20. The first driving component 5 can be a combination of a driving motor and a gearbox, and drives the rotating tube 12 to rotate by gear transmission.

[0064] The rotating tube 2 is coaxially arranged with the rotating cylinder 1, and the upper end of the rotating tube 2 passes through the rotating tube 12, and the rotating tube 2 is relatively rotated with the rotating tube 12. The second driving assembly 6 can be a combination of a driving motor and a gearbox, and drives the rotating tube 2 to rotate by gear transmission. In addition, the driving directions of the first driving assembly 5 and the second driving assembly 6 are opposite, that is, the rotating directions of the rotating tube 2 and the rotating cylinder 1 are opposite.

[0065] The heat transfer oil delivery assembly is used to deliver heat transfer oil into the rotating tube 2, specifically, as follows Figure 2 , Figure 3 As shown, the thermal oil delivery assembly includes an oil tank 61, an oil inlet pipe 62, an oil return pipe 63, a delivery pump 64 and a solenoid valve 65, wherein one end of the oil inlet pipe 62 and the oil return pipe 63 are both connected to the oil tank 61, the delivery pump 64 is arranged on the oil inlet pipe 62, and the solenoid valve 65 is arranged on the oil return pipe 63 to control the on-off of the oil return pipe 63.

[0066] An oil inlet passage 23 and an oil return passage 24 are provided inside the rotating pipe 2. The outlet of the oil inlet passage 23 is communicated with the inlet of the oil return passage 24. A second rotating joint 66 is rotatably sleeved on the upper end of the rotating pipe 2. The inlet pipe 62 is communicated with the inlet of the oil inlet passage 23 through the second rotating joint 66, and the return pipe 63 is communicated with the outlet of the oil return passage 24 through the second rotating joint 66.

[0067] In this way, the heat-conducting oil can circulate inside the rotating pipe 2 to heat the materials in the core of the rotating cylinder 1. And in this embodiment, heating wires (not shown in the figure) are also clamped on the inner wall of the kettle body 10 to heat the materials in the kettle body 10.

[0068] As Figure 2 、 Figure 4 shown, an upper auger 21 and a lower auger 22 are respectively fixed to the upper and lower parts of the rotating pipe 2. The upper auger 21 is used to convey the materials in the upper part of the inner cavity of the kettle body 10 into the rotating cylinder 1, and the lower auger 22 is used to convey the materials in the lower part of the inner cavity of the kettle body 10 into the rotating cylinder 1.

[0069] A plurality of stirring pipes 3 arranged radially along the rotating cylinder 1 are fixed to the outer side of the middle part of the rotating cylinder 1. The stirring pipes 3 are arranged at intervals along the axial direction of the rotating cylinder 1. The stirring pipes 3 are communicated with the inner cavity of the rotating cylinder 1. A guide arc piece 31 is provided at one end of the stirring pipe 3 located in the inner cavity of the rotating cylinder 1. The inner arc surface of the guide arc piece 31 faces the rotating direction, that is, during the rotation of the rotating cylinder 1, the guide arc piece 31 rotates accordingly, and the guide arc piece 31 shovels the materials in the middle of the rotating cylinder 1 into the stirring pipe 3.

[0070] As Figure 2 、 Figure 5 shown, a conical member 32 is provided at one end of the stirring pipe 3 away from the guide arc piece 31. Specifically, the conical member 32 is made of metal, and the conical member 32 is fixedly connected to the inner wall of the stirring pipe 3 through a connecting rod 33; the conical member 32 is conical, the conical member 32 is coaxially arranged with the stirring pipe 3, the tip of the conical member 32 faces the middle of the stirring pipe 3, and the outer diameter of the conical member 32 is smaller than the inner diameter of the stirring pipe 3, so that an annular discharge gap 30 is provided between the outer edge of the conical member 32 and the port of the stirring pipe 3.

[0071] In use, the material is put into the kettle body 10 through the opening on the kettle body 10, and then the cover body 20 is covered. The rotating cylinder 1 and the rotating pipe 2 on the cover body 20 enter the kettle body 10 together. The kettle body 10 is closed, and then the first driving component 5 and the second driving component 6 are started simultaneously. The rotating cylinder 1 and the rotating pipe 2 rotate in opposite directions. During this process, the rotating pipe 2 drives the upper auger 21 and the lower auger 22 to rotate together, so as to convey the upper material and the lower material in the inner cavity of the kettle body 10 to the middle position of the rotating cylinder 1, where preliminary mixing is carried out. And, under the action of the upper auger 21 and the lower auger 22, the material in the middle of the rotating cylinder 1 has a conveying pressure due to this action, and the pressured material will overflow into the stirring pipe 3 in the middle of the rotating cylinder 1. And during the rotation of the rotating cylinder 1, the guiding arc piece 31 shovels the material in the middle of the rotating cylinder 1 into the stirring pipe 3. Therefore, under the dual action of pressure and centrifugal force, the material in the stirring pipe 3 will move axially along the stirring pipe 3 to the conical part 32 and be ejected under pressure from the discharge gap 30. The sprayed and diffused material is secondarily mixed with the material in the kettle body 10. At the same time, the stirring pipe 3 rotates together with the rotating cylinder 1, and the stirring pipe 3 can finally stir the secondarily mixed material.

[0072] Therefore, three cyclic actions of preliminary mixing, secondary mixing and final stirring of the material are carried out, and an internal circulation is formed in the kettle body 10, and the above three actions are cycled in sequence, so as to greatly improve the mixing effect of the material, thereby improving the hydrothermal treatment reaction effect.

[0073] Embodiment 2

[0074] The difference between Embodiment 2 and Embodiment 1 is that, as Figure 6 、 Figure 7 shown, the rotating cylinder 1 is provided with a sleeve 13, and the stirring pipe 3 is slidably connected to the sleeve 13 along the radial direction of the rotating cylinder 1. And, a return spring 35 is sleeved on the part of the stirring pipe 3 located in the inner cavity of the rotating cylinder 1. The elastic coefficients of the return springs 35 corresponding to each stirring pipe 3 are different. A convex ring 34 is fixed on the outer peripheral surface of the stirring pipe 3. One end of the return spring 35 abuts against the convex ring 34, and the other end of the return spring 35 abuts against the inner wall of the rotating cylinder 1. The return spring 35 is used to force the stirring pipe 3 to slide along the direction towards the axis of the rotating cylinder 1.

[0075] During the process that the material in the stirring pipe 3 moves axially along the stirring pipe 3 to the conical part 32, under the dual action of pressure and centrifugal force, the high-pressure material exerts a pressure on the conical part 32, and this pressure forces the stirring pipe 3 to slide outwards relative to the rotating cylinder 1 (the return spring 35 stores energy).

[0076] And when the rotation speeds of the rotating cylinder 1 and the stirring pipe 3 are reduced, the centrifugal force is reduced, and the return spring 35 releases its potential energy, forcing the stirring pipe 3 to slide inwards relative to the rotating cylinder 1.

[0077] That is, by controlling the rotation speed of the rotating cylinder 1 and the rotation speed of the rotating pipe 2, the telescopic movement of the stirring pipe 3 can be controlled, so that the stirring pipe 3 can perform intermittent reciprocating sliding, thereby changing the ejection position of the material, so as to facilitate uniform mixing with the materials at various parts in the kettle body 10.

[0078] Secondly, since the amount of material moving axially toward the middle in the rotating cylinder 1 is also different, the amount of material in the stirring pipes 3 at each axial position entering the rotating cylinder 1 is different. Therefore, the mass of the material in each stirring pipe 3 is different, the magnitude of the centrifugal force is different, and the telescopic displacement of the stirring pipe 3 is different. Moreover, under the action of the same pressure and centrifugal force, due to the different elastic coefficients of the return springs 35, the telescopic displacement of the stirring pipe 3 is also different, so that within the same time, the materials ejected from each stirring pipe 3 can simultaneously diffuse into the materials at various parts of the kettle body 10, thereby further improving the mixing uniformity.

[0079] Example 3

[0080] The difference between Example 3 and Example 1 is that, as Figure 8 , Figure 9 shown, a first rotating joint 25 is rotatably sleeved on the outside of the rotating pipe 2, and the first rotating joints 25 are arranged at intervals along the axial direction. A stirring blade 7 corresponding to the stirring pipe 3 is fixed on the outer peripheral surface of the first rotating joint 25. In this embodiment, the heat-conducting oil can enter the stirring blade 7 through the rotating pipe 2, so that the stirring blade 7 can not only improve the stirring and mixing degree, but also further heat the material.

[0081] Specifically, the stirring blade 7 includes a cylinder body 71, a telescopic sheet body 72 and a conical piston 73 made of rubber. One end of the cylinder body 71 is fixed on the outside of the first rotating joint 25, and the inner cavity of the cylinder body 71 is communicated with the oil return passage 24 through the first rotating joint 25. The telescopic sheet body 72 is hermetically and slidably connected with the cylinder body 71.

[0082] As Figure 8 , Figure 10 shown, the conical piston 73 is fixed at the end of the telescopic sheet body 72, the inner conical surface of the conical piston 73 faces the stirring pipe 3, and a driving spring 74 is fixedly connected between the conical piston 73 and the conical member 32.

[0083] As Figure 11As shown, the conical member 32 is made of an elastic material. Specifically, the conical member 32 includes an abutting circular plate 321 and a plurality of rubber sheets 323. One end of the driving spring 74 is fixedly connected to the abutting circular plate 321. A plurality of inclined support plates 322 are integrally formed at the outer diameter of the abutting circular plate 321. The support plates 322 are uniformly arranged along the circumference of the abutting circular plate 321. Both sides of the rubber sheet 323 are fixedly connected to the support plates 322 on both sides, thus forming the conical member 32 in a conical shape. Moreover, a plurality of flow guiding grooves 324 are formed on the surface of the rubber sheet 323 along the radial direction of the conical member 32.

[0084] As Figure 8 shown, a limiting support rod 311 is fixed at the nozzle of the stirring tube 3. The limiting support rod 311 is arranged along the radial direction of the stirring tube 3. The outer edge of the conical member 32 abuts against the limiting support rod 311.

[0085] First, start the solenoid valve 65 to cut off the return oil pipe 63. The delivery pump 64 injects heat-conducting oil into the rotating tube 2. The pressurized heat-conducting oil will enter the cylinder block 71 through the second rotating joint 66. The heat-conducting oil in the inner cavity of the cylinder block 71 will push the telescopic sheet body 72 and the conical piston 73 towards the stirring tube 3. During the movement of the conical piston 73, the material in the middle of the rotating cylinder 1 will be pushed into the stirring tube 3, and the material in the stirring tube 3 will be pressurized to increase the injection speed and diffusion range of the material in the stirring tube 3. Moreover, during this process, the driving spring 74 is compressed, and the elastic force of the driving spring 74 is applied to the middle of the conical member 32, forcing the conical member 32 to move outwards. At this time, the limiting support rod 311 abuts against the conical member 32 to prevent the outward movement of the conical member 32, causing the conical member 32 to deform, and the outer edge of the conical member 32 expands outwards, and the discharge gap 30 is further reduced to increase the injection flow rate, thereby increasing the injection speed and diffusion range of the material.

[0086] When the conical piston 73 moves to the end of the stroke, the delivery pump 64 stops working, and the solenoid valve 65 conducts the return oil pipe 63. At this time, there is no pressure in the cylinder block 71, and the driving spring 74 releases its elastic potential energy, forcing the conical piston 73 to move away from the stirring tube 3 to the initial position, thus realizing the reciprocating movement of the conical piston 73 to achieve reciprocating pressurization.

[0087] Example 4

[0088] The difference between Example 4 and Example 3 is that, as Figure 12 and Figure 13 shown, the stirring blade 7 is a sheet body with a hollow inner cavity. The inner cavity of this sheet body is communicated with the oil return passage 24 of the rotating tube 2. Moreover, a rotating rod 75 is rotatably connected to the end of the stirring blade 7. The rotating rod 75 is coaxially arranged with the stirring tube 3. The other end of the rotating rod 75 is fixedly connected to the center of the conical member 32.

[0089] The conical member 32 is made of rubber, and a plurality of blade protrusions 325 are arranged on the inner conical surface of the conical member 32 in a circumferentially uniform manner; moreover, a compression spring 312 is arranged on the inner conical surface of the conical member 32, the compression spring 312 is arranged along the radial direction of the conical member 32, and both ends of the compression spring 312 are fixedly connected to the outer edge of the conical member 32. The compression spring 312 is in a state of arching outwards. Therefore, the elastic force of the compression spring 312 will force the outer edge of the conical member 32 to abut against the inner wall of the stirring tube 3.

[0090] During the process that the high-pressure material moves axially along the stirring tube 3 to the conical member 32, the high-pressure material applies pressure to the conical member 32, and this pressure is converted into a driving force that forces the conical member 32 to rotate by itself through the blade protrusions 325, so that the material can be ejected in an arc shape along the gaps between adjacent blade protrusions 325, thereby improving the diffusion uniformity of the material and thus improving the material mixing effect.

[0091] Moreover, the elastic force of the compression spring 312 can improve the deformation recovery speed and rigidity of the conical member 32, thereby reducing the occurrence of the situation where the conical member 32 fails due to excessive deformation.

[0092] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A resource utilization system for the collaborative disposal of waste incineration fly ash, sludge and biogas residue, characterized in that: It includes a hybrid hydrothermal treatment device, a compression device, a pyrolysis device, and a rotary kiln device connected in sequence; the hybrid hydrothermal treatment device includes a kettle body (10) with an upper opening, a cover body (20) for sealing the upper opening of the kettle body (10), a rotating cylinder (1), a rotating pipe (2), a heat transfer oil conveying assembly, a first driving assembly (5) for driving the rotation of the rotating cylinder (1), and a second driving assembly (6) for driving the rotation of the rotating pipe (2). The rotating cylinder (1) is coaxially arranged with the kettle body (10), and feeding ports are provided at both the upper and lower ends of the rotating cylinder (1). The rotating pipe (2) is coaxially arranged with the rotating cylinder (1), and the driving directions of the first driving assembly (5) and the second driving assembly (6) are opposite. The heat transfer oil conveying assembly is used to convey heat transfer oil into the rotating pipe (2); an upper auger (21) and a lower auger (22) are respectively provided at the upper and lower parts of the rotating pipe (2). The upper auger (21) is used to convey the materials in the upper part of the inner cavity of the kettle body (10) into the rotating cylinder (1), and the lower auger (22) is used to convey the materials in the lower part of the inner cavity of the kettle body (10) into the rotating cylinder (1). A plurality of stirring pipes (3) arranged radially along the rotating cylinder (1) are provided at the outer side of the middle part of the rotating cylinder (1). The stirring pipes (3) communicate with the inner cavity of the rotating cylinder (1). A guiding arc piece (31) is provided at one end of the stirring pipe (3) located in the inner cavity of the rotating cylinder (1), and a conical piece (32) is provided at the other end of the stirring pipe (3). The tip of the conical piece (32) faces the middle of the stirring pipe (3), and an annular discharge gap (30) is provided between the outer edge of the conical piece (32) and the port of the stirring pipe (3); each of the stirring pipes (3) is arranged at intervals along the axial direction of the rotating cylinder (1). A sleeve (13) is provided on the rotating cylinder (1), and the stirring pipe (3) is slidably connected with the sleeve (13) along the radial direction of the rotating cylinder (1). A return spring (35) is provided between the rotating cylinder (1) and the stirring pipe (3). The return spring (35) is used to force the stirring pipe (3) to slide along the direction towards the axis of the rotating cylinder (1); the elastic coefficients of the return springs (35) corresponding to each of the stirring pipes (3) are different.

2. The resource utilization system for co-disposing of waste incineration fly ash, sludge and biogas residue according to claim 1, wherein: A first rotating joint (25) is rotatably sleeved on the outer side of the rotating pipe (2), and stirring blades (7) corresponding to the stirring pipes (3) one by one are fixed on the outer peripheral surface of the first rotating joint (25). The first rotating joint (25) is used to convey the heat transfer oil in the rotating pipe (2) into the inside of the stirring blades (7).

3. The resource utilization system for the collaborative treatment of waste incineration fly ash, sludge and biogas residue according to claim 2, characterized in that: The heat-conducting oil conveying assembly includes an inlet pipe (62), a return pipe (63), a conveying pump (64) and a solenoid valve (65). An oil inlet passage (23) and an oil return passage (24) are provided in the rotating pipe (2). The outlet of the oil inlet passage (23) is communicated with the inlet of the oil return passage (24). A second rotating joint (66) is rotatably sleeved on the upper end of the rotating pipe (2). The inlet pipe (62) is communicated with the inlet of the oil inlet passage (23) through the second rotating joint (66). The return pipe (63) is communicated with the outlet of the oil return passage (24) through the second rotating joint (66). The stirring blade (7) includes a cylinder body (71), a telescopic sheet body (72) and a conical piston (73) made of rubber. One end of the cylinder body (71) is fixed to the outside of the first rotating joint (25). The inner cavity of the cylinder body (71) is communicated with the oil return passage (24) through the first rotating joint (25). The telescopic sheet body (72) is slidably connected with the cylinder body (71). The conical piston (73) is fixed to the end of the telescopic sheet body (72). The inner conical surface of the conical piston (73) faces the stirring pipe (3). A driving spring (74) is fixedly connected between the conical piston (73) and the conical member (32). The conical member (32) is made of an elastic material. A limiting support rod (311) is fixed at the pipe orifice of the stirring pipe (3). The outer edge of the conical member (32) abuts against the limiting support rod (311).

4. The resource utilization system for co-disposing waste incineration fly ash, sludge and biogas residue according to claim 3, wherein: The conical member (32) includes a contact circular plate (321) and a plurality of rubber sheets (323). A plurality of inclined support plates (322) are integrally formed at the outer diameter of the contact circular plate (321). The support plates (322) are uniformly arranged along the circumference of the contact circular plate (321). The two sides of the rubber sheet (323) are respectively fixedly connected with the support plates (322) on both sides.

5. The resource utilization system for the co-disposal of waste incineration fly ash, sludge and biogas residue according to claim 4, characterized in that: A plurality of diversion grooves (324) are formed on the surface of the rubber sheet (323) and are arranged radially along the conical member (32).

6. The resource utilization system for the co-disposal of waste incineration fly ash, sludge and biogas residue according to claim 2, characterized in that: A rotating rod (75) is rotatably connected to the end of the stirring blade (7). The rotating rod (75) is coaxially arranged with the stirring pipe (3). The end of the rotating rod (75) is fixedly connected with the conical member (32). A plurality of paddle protrusions (325) are arranged on the inner conical surface of the conical member (32) and are uniformly arranged in a circle.

7. The resource utilization system for the coordinated disposal of waste incineration fly ash, sludge and biogas residue according to claim 6, characterized in that: The conical member (32) is made of rubber.

8. The resource utilization system for the collaborative treatment of waste incineration fly ash, sludge and biogas residue according to claim 7, characterized in that: A compression spring (312) is arranged on the inner conical surface of the conical member (32). The compression spring (312) is arranged radially along the conical member (32). The two ends of the compression spring (312) are fixedly connected with the outer edge of the conical member (32). The compression spring (312) forces the outer edge of the conical member (32) to abut against the inner wall of the stirring pipe (3).

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