Waste salt microwave pyrolysis device

Abstract

The utility model provides a waste salt microwave pyrolysis device. The waste salt microwave pyrolysis device comprises a pyrolysis furnace body, a stirring and conveying mechanism, a microwave generating mechanism and an atmosphere mechanism rack, the pyrolyzing furnace body comprises a furnace shell, a material separating plate is arranged in the furnace shell, and the furnace shell is divided into a microwave chamber and a pyrolyzing chamber by the material separating plate; the stirring and conveying mechanism comprises a stirring shaft, a stirring rod and a stirring rake which are arranged in the pyrolysis chamber, and the stirring shaft is connected with the motor; the microwave generating mechanism comprises a plurality of microwave magnetrons and microwave waveguides which are arranged in the microwave cavity; the atmosphere mechanism comprises an air inlet, a lower exhaust port and an upper exhaust port, the air inlet is connected with the inert gas storage tank, and the lower exhaust port and the upper exhaust port are connected with the fan. According to the device, microwaves are used as a heat source, the stirring and conveying mechanism can dynamically turn over materials, the materials are uniformly heated and fully pyrolyzed, waste salt is uniformly heated in a stirring and conveying state, organic matters in the waste salt are pyrolyzed, the pyrolysis efficiency is improved, and meanwhile, the waste salt is prevented from being molten and coked.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrolysis, and specifically, to a microwave pyrolysis device for waste salt. Background Art

[0002] Waste salt mainly comes from various chemical production processes. A large amount of chemical waste salt is a pain point in the development of the chemical industry. Waste salt has the characteristics of complex composition and high content of organic toxic substances. The treatment methods for high-salt waste liquid mainly include a pretreatment stage, including air flotation, oil separation, sedimentation, electrolysis, adsorption, separation, oxidation and other links, and then achieve harmless treatment through evaporation, concentration, crystallization, pyrolysis incineration and other links. Among them, the harmless treatment in links such as pyrolysis incineration is the key to the refinement and recycling of waste salt. The pyrolysis of waste salt is a process of decomposing the organic pollutants and leaching toxicity carried by the waste salt after heating the waste salt in an oxygen-free environment to a certain temperature.

[0003] The pyrolysis devices used in the existing waste salt pyrolysis process have problems such as uneven temperature, difficult temperature control, and uneven heating of waste salt. Too low local temperature will lead to insufficient pyrolysis of organic matter, while too high local temperature can cause waste salt to melt and coke, which is not conducive to discharging waste salt and is not conducive to later resource utilization. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a microwave pyrolysis device for waste salt, which uses microwave as a heat source to uniformly heat waste salt in a stirring and conveying state, pyrolyze the organic matter in the waste salt, improve the pyrolysis efficiency and prevent waste salt from melting and coking.

[0005] The utility model provides a microwave pyrolysis device for waste salt, including a pyrolysis furnace body, a stirring and conveying mechanism, a microwave generating mechanism, an atmosphere mechanism and a frame, wherein:

[0006] The pyrolysis furnace body includes a furnace shell. The lower part of the furnace shell is a pyrolysis chamber, and its upper part is a microwave chamber. A partition plate is provided between the pyrolysis chamber and the microwave chamber. An inlet is provided on the upper side of one end of the furnace shell. A feeder is provided above the inlet, and a feed hopper is connected above the feeder. An outlet is provided on the lower side of the other end of the furnace shell, and a receiving funnel is provided below the outlet;

[0007] The stirring and conveying mechanism includes a stirring shaft arranged in the pyrolysis chamber. A plurality of stirring rods are arranged on the stirring shaft. Stirring rakes are arranged at both ends of the stirring rods. One end of the stirring shaft is connected to the power output end of the motor through a belt;

[0008] The microwave generating mechanism includes a plurality of microwave magnetrons arranged on the microwave chamber. A microwave waveguide is connected to the microwave magnetrons, and the microwave waveguide is arranged inside the microwave chamber;

[0009] The atmosphere mechanism includes an air inlet and a lower exhaust port provided on the side wall of the pyrolysis chamber and an upper exhaust port provided on the upper wall of the microwave chamber. The air inlet is connected to an inert gas storage tank through an air inlet pipe, and the lower exhaust port and the upper exhaust port are connected to a fan through an exhaust pipe;

[0010] The frame includes a support frame. There are a fixed support seat and a movable adjustment seat between the support frame and the furnace shell. The height of the movable adjustment seat is higher than that of the fixed support seat. The fixed support seat is fixedly connected to the frame, and the movable adjustment seat is movably installed on the frame.

[0011] Preferably, the pyrolysis chamber includes a feeding section, a heating section, a cooling section, and a discharging section connected in sequence. A feeder is provided on the upper side of the feeding section, and a receiving hopper is provided on the lower side of the discharging section. Bellows are respectively provided at the discharging port of the feeder, the discharging port of the feeding hopper, and the feeding port of the receiving hopper.

[0012] Preferably, a cooling jacket is provided on the outer wall of the cooling section, and a cooling coil is provided inside the cooling jacket.

[0013] Preferably, every two adjacent stirring rods are perpendicular to each other, and the stirring rakes at both ends of the same stirring rod incline in different directions.

[0014] Preferably, the fixed support seat includes a fixed bottom plate. A group of fixed support plates are vertically provided on the fixed bottom plate. The upper ends of the fixed support plates are movably equipped with first rotating seats, and the fixed support plates and the first rotating seats are connected by first pins; the movable adjustment seat includes a movable bottom plate. A group of movable support plates are vertically provided on the movable bottom plate. The upper ends of the movable support plates are movably equipped with second rotating seats, and the movable support plates and the second rotating seats are connected by second pins. A guide groove is provided on the lower side of the movable bottom plate.

[0015] Preferably, a guide rail and a strip-shaped hole parallel to the guide rail are provided on the cross plate of the support frame. The movable bottom plate is equipped on the guide rail, and a bolt passes through the strip-shaped hole to connect the movable bottom plate and the cross plate of the support frame; the fixed bottom plate is installed on the cross plate of the support frame through bolts.

[0016] Preferably, a mounting seat is provided on the vertical plate of the support frame. A mounting collar is provided on the mounting seat. The feeding hopper and the feeder are respectively installed in the mounting collar. A protective cover is provided on the support frame, and a protective lid is provided on the top of the protective cover.

[0017] Preferably, a screw jack is provided on the bottom plate of the support frame. The upper end of the telescopic rod of the screw jack is connected to a rotating seat, and the rotating seat is connected to the lower wall of the furnace shell.

[0018] Preferably, it further includes a control system. The control system includes a control cabinet, a touch screen, several thermocouples provided on the side wall of the furnace shell, a flow meter and a pressure gauge provided at the discharge end of the furnace shell. The control cabinet is electrically connected to the thermocouples, the flow meter, the pressure gauge, the microwave magnetron and the feeder. The touch screen is connected to the microwave magnetron.

[0019] Preferably, the pyrolysis chamber is semi-cylindrical, and the microwave chamber is rectangular. The microwave magnetrons are provided on the two side walls and the upper side wall of the microwave chamber.

[0020] The working principle of the present invention: In the waste salt microwave pyrolysis device of the present invention, when in use, waste salt is added to the feed hopper and quantitatively fed into the pyrolysis chamber through the feeder. The motor drives the stirring shaft to rotate, and the stirring rake is used to turn and stir the material and convey it to the discharge end. At the same time, the microwave generating mechanism in the microwave chamber generates microwaves and sends them to the pyrolysis chamber. The energy of the microwaves is used to heat the waste salt to pyrolyze the organic matter therein. The waste gas generated by pyrolysis is discharged through the lower exhaust port and the upper exhaust port under the action of the fan. At the same time, a pressure gauge is configured for detection to ensure that the furnace maintains a slightly positive pressure. If it exceeds or is lower than the set pressure value, it will promptly feedback to the control system to turn off the microwave or supplement inert gas to ensure the safety of the equipment. This device is provided with microwave energy by 80 1.5kW magnetrons. Adopting the control mode of combining the control cabinet with the touch screen, the process curve can be set, and data such as temperature, power, time, and pressure can be set, and the experimental data can be stored for more than 7 days. Each magnetron can be individually started and stopped through the touch screen or the control cabinet. Each magnetron has an operation indication function and an over-temperature alarm function, and the temperature control is sensitive. In addition, when it is necessary to adjust the inclination of the pyrolysis furnace body, the pyrolysis furnace body can be lifted to a certain height by using a screw jack, and then the movable adjustment seat is moved along the guide rail to support the pyrolysis furnace body, and then the movable adjustment seat is fixed by using bolts. Since the height of the movable adjustment seat is higher than that of the fixed support seat, when the movable adjustment seat is moved towards the fixed support seat, the inclination of the pyrolysis furnace body will increase, so as to facilitate the adjustment of the material conveying rate.

[0021] The beneficial effects of the present invention: In the waste salt microwave pyrolysis device of the present invention, using microwave as the heat source, the stirring and conveying mechanism can dynamically turn the material, the material is evenly heated, and the pyrolysis is sufficient. The waste salt is evenly heated under the stirring and conveying state to pyrolyze the organic matter in the waste salt, improving the pyrolysis efficiency and preventing the waste salt from melting and coking. In addition, using a screw jack combined with a movable adjustment seat to adjust and support the frame, on the one hand, it is convenient to adjust the inclination angle of the pyrolysis furnace body according to production needs, facilitating the discharge of the pyrolyzed waste salt, and at the same time providing a gravity support for the feeding end of the pyrolysis furnace body. Description of the Drawings

[0022] Figure 1 It is the front view of the waste salt microwave pyrolysis device of the present invention;

[0023] Figure 2 is Figure 1 Schematic diagram of the connection between the movable adjusting seat and the furnace shell;

[0024] Figure 3 is Figure 1 Schematic diagram of the connection between the fixed support seat and the furnace shell.

[0025] In the figure: pyrolysis furnace body 1, furnace shell 11, pyrolysis chamber 12, feeding section 12-1, heating section 12-2, cooling section 12-3, discharging section 12-4, microwave chamber 13, baffle 14, feeder 15, feed hopper 16, receiving hopper 17, corrugated pipe 18; stirring and conveying mechanism 2, stirring shaft 21, stirring rod 22, stirring rake 23, belt 24, motor 25; microwave generating mechanism 3, microwave magnetron 31, microwave waveguide 32; atmosphere mechanism 4, air inlet 41, lower exhaust port 42, upper exhaust port 43; frame 5, support frame 51, fixed support seat 52, fixed bottom plate 52-1, fixed support plate 52-2, first rotating seat 52-3, first bolt 52-4, movable adjusting seat 53, movable bottom plate 53-1, movable support plate 53-2, second rotating seat 53-3, second bolt 53-4, guide rail 54, mounting seat 55, mounting collar 56, protective cover 57, protective lid 58, screw jack 59, rotating seat 50; control system 6, thermocouple 61, flowmeter 62, pressure gauge 63, touch screen 64. Detailed implementation manners

[0026] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings by using specific embodiments.

[0027] Embodiment 1:

[0028] As Figures 1 to 3 shown, the waste salt microwave pyrolysis device of this embodiment includes a pyrolysis furnace body 1, a stirring and conveying mechanism 2, a microwave generating mechanism 3, an atmosphere mechanism 4 and a frame 5, wherein:

[0029] The pyrolysis furnace body 1 includes a furnace shell 11. The lower part of the furnace shell 11 is a pyrolysis chamber 12, and the upper part thereof is a microwave chamber 13. A baffle 14 is provided between the pyrolysis chamber 12 and the microwave chamber 13. An inlet is provided on the upper side of one end of the furnace shell 11. A feeder 15 is provided above the inlet, and a feed hopper 16 is connected above the feeder 15. An outlet is provided on the lower side of the other end of the furnace shell 11, and a receiving hopper 17 is provided below the outlet;

[0030] The stirring and conveying mechanism 2 includes a stirring shaft 21 disposed in the pyrolysis chamber 12. A plurality of stirring rods 22 are provided on the stirring shaft 21. Stirring rakes 23 are provided at both ends of the stirring rods 22. One end of the stirring shaft 21 is connected to the power output end of the motor 25 through a belt 24;

[0031] The microwave generating mechanism 3 includes a plurality of microwave magnetrons 31 disposed on the microwave chamber 13. A microwave waveguide 32 is connected to the microwave magnetron 31. The microwave waveguide 32 is disposed inside the microwave chamber 13;

[0032] The atmosphere mechanism 4 includes an air inlet 41 and a lower exhaust port 42 disposed on the side wall of the pyrolysis chamber 12 and an upper exhaust port 43 disposed on the upper wall of the microwave chamber 13. The air inlet 41 is connected to an inert gas storage tank through an air inlet pipe. The lower exhaust port 42 and the upper exhaust port 43 are connected to a blower through an exhaust pipe;

[0033] The frame 5 includes a support frame 51. A fixed support base 52 and a movable adjustment base 53 are provided between the support frame 51 and the furnace shell 11. The height of the movable adjustment base 53 is higher than that of the fixed support base 52. The fixed support base 52 is fixedly connected to the frame 5. The movable adjustment base 53 is movably mounted on the frame 5.

[0034] Embodiment 2:

[0035] As Figures 1 to 3 shown, the waste salt microwave pyrolysis device of this embodiment includes a pyrolysis furnace body 1, a stirring and conveying mechanism 2, a microwave generating mechanism 3, an atmosphere mechanism 4 and a frame 5, wherein:

[0036] The pyrolysis furnace body 1 includes a furnace shell 11. The lower part of the furnace shell 11 is a pyrolysis chamber 12, and its upper part is a microwave chamber 13. A partition plate 14 is provided between the pyrolysis chamber 12 and the microwave chamber 13. An inlet is provided on the upper side of one end of the furnace shell 11. A feeder 15 is provided above the inlet. A feed hopper 16 is connected above the feeder 15. An outlet is provided on the lower side of the other end of the furnace shell 11. A receiving hopper 17 is provided below the outlet;

[0037] The stirring and conveying mechanism 2 includes a stirring shaft 21 disposed in the pyrolysis chamber 12. A plurality of stirring rods 22 are provided on the stirring shaft 21. Stirring rakes 23 are provided at both ends of the stirring rods 22. One end of the stirring shaft 21 is connected to the power output end of the motor 25 through a belt 24;

[0038] The microwave generating mechanism 3 includes a plurality of microwave magnetrons 31 disposed on the microwave chamber 13. A microwave waveguide 32 is connected to the microwave magnetron 31. The microwave waveguide 32 is disposed inside the microwave chamber 13;

[0039] The atmosphere mechanism 4 includes an air inlet 41 and a lower exhaust port 42 provided on the side wall of the pyrolysis chamber 12 and an upper exhaust port 43 provided on the upper wall of the microwave chamber 13. The air inlet 41 is connected to an inert gas storage tank through an air inlet pipe, and the lower exhaust port 42 and the upper exhaust port 43 are connected to a fan through an exhaust pipe;

[0040] The frame 5 includes a support frame 51. A fixed support base 52 and a movable adjustment base 53 are provided between the support frame 51 and the furnace shell 11. The height of the movable adjustment base 53 is higher than that of the fixed support base 52. The fixed support base 52 is fixedly connected to the frame 5, and the movable adjustment base 53 is movably installed on the frame 5.

[0041] The pyrolysis chamber 12 includes a feeding section 12-1, a heating section 12-2, a cooling section 12-3, and a discharging section 12-4 connected in sequence. A feeder 15 is provided above the feeding section 12-1, and a receiving hopper 17 is provided below the discharging section 12-4. Bellows 18 are respectively provided at the discharging port of the feeder 15, the discharging port of the feed hopper 16, and the feeding port of the receiving hopper 17.

[0042] A cooling jacket 19 is provided on the outer wall of the cooling section 12-3, and a cooling coil 10 is provided inside the cooling jacket 19.

[0043] Every two adjacent stirring rods 22 are perpendicularly arranged, and the stirring rakes 23 at both ends of the same stirring rod 22 incline in different directions.

[0044] The fixed support base 52 includes a fixed bottom plate 52-1. A group of fixed support plates 52-2 are vertically provided on the fixed bottom plate 52-1. The upper ends of the fixed support plates 52-2 are movably fitted with a first rotating seat 52-3, and the fixed support plates 52-2 and the first rotating seat 52-3 are connected by a first pin 52-4; The movable adjustment base 53 includes a movable bottom plate 53-1. A group of movable support plates 53-2 are vertically provided on the movable bottom plate 53-1. The upper ends of the movable support plates 53-2 are movably fitted with a second rotating seat 53-3, and the movable support plates 53-2 and the second rotating seat 53-3 are connected by a second pin 53-4. A guide groove is provided on the lower side of the movable bottom plate 53-1.

[0045] A guide rail 54 and a strip-shaped hole parallel to the guide rail 54 are provided on the cross plate of the support frame 51. The movable bottom plate 53-1 is fitted on the guide rail 54, and a bolt passes through the strip-shaped hole to connect the movable bottom plate 53-1 with the cross plate of the support frame 51; The fixed bottom plate 52-1 is installed on the cross plate of the support frame 51 through a bolt.

[0046] An installation seat 55 is provided on the vertical plate of the support frame 51. An installation collar 56 is provided on the installation seat 55. The feed hopper 16 and the feeder 15 are respectively installed in the installation collar 56. A protective cover 57 is provided on the support frame 51, and a protective lid 58 is provided on the top of the protective cover 57.

[0047] A screw lift 59 is provided on the bottom plate of the support frame 51 , and the upper end of the telescopic rod of the screw lift 59 is connected to the rotating seat 50 , and the rotating seat is connected to the lower wall of the furnace shell 11 .

[0048] It also includes a control system 6, which includes a control cabinet, a touch screen 64, and several thermocouples 61 arranged on the side wall of the furnace shell 11, and a flow meter 62 and a pressure gauge 63 arranged at the discharge end of the furnace shell 11. The control cabinet is electrically connected to the thermocouple 61, the flow meter 62, the pressure gauge 63, the microwave magnetron 31 and the feeder 15, and the touch screen 64 is connected to the microwave magnetron 31.

[0049] The pyrolysis chamber 12 is semi-cylindrical, the microwave chamber 13 is rectangular, and the microwave magnetron 31 is disposed on both side walls and an upper side wall of the microwave chamber 13 .

[0050] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A waste salt microwave pyrolysis device, characterized in that: It comprises a pyrolysis furnace body (1), a stirring and conveying mechanism (2), a microwave generating mechanism (3), an atmosphere mechanism (4) and a frame (5), wherein: The pyrolysis furnace body (1) comprises a furnace shell (11), the lower part of the furnace shell (11) is a pyrolysis chamber (12), the upper part of the furnace shell (11) is a microwave chamber (13), a material partition plate (14) is provided between the pyrolysis chamber (12) and the microwave chamber (13), a feed port is provided on the upper side of one end of the furnace shell (11), a feeder (15) is provided above the feed port, a feed hopper (16) is connected above the feeder (15), a discharge port is provided on the lower side of the other end of the furnace shell (11), and a material receiving funnel (17) is provided below the discharge port; The stirring and conveying mechanism (2) comprises a stirring shaft (21) disposed in the pyrolysis chamber (12), a plurality of stirring rods (22) being disposed on the stirring shaft (21), stirring rakes (23) being disposed at both ends of the stirring rods (22), and one end of the stirring shaft (21) being connected to a power output end of a motor (25) via a belt (24); The microwave generating mechanism (3) comprises a plurality of microwave magnetrons (31) arranged on the microwave chamber (13); the microwave magnetrons (31) are connected to a microwave waveguide (32); and the microwave waveguide (32) is arranged inside the microwave chamber (13); The atmosphere mechanism (4) comprises an air inlet (41) and a lower air outlet (42) provided on a side wall of the pyrolysis chamber (12), and an upper air outlet (43) provided on an upper wall of the microwave chamber (13); the air inlet (41) is connected to an inert gas storage tank via an air inlet pipe, and the lower air outlet (42) and the upper air outlet (43) are connected to a fan via an air outlet pipe; The frame (5) comprises a support frame (51), a fixed support seat (52) and a movable adjustment seat (53) are provided between the support frame (51) and the furnace shell (11), the movable adjustment seat (53) is higher than the fixed support seat (52), the fixed support seat (52) is fixedly connected to the frame (5), and the movable adjustment seat (53) can be movably installed on the frame (5).

2. The waste salt microwave pyrolysis device according to claim 1, characterized in that: The pyrolysis chamber (12) comprises a feeding section (12-1), a heating section (12-2), a cooling section (12-3) and a discharging section (12-4) which are connected in sequence; a feeder (15) is arranged on the upper side of the feeding section (12-1); a receiving hopper (17) is arranged on the lower side of the discharging section (12-4); and a discharge port of the feeder (15), a discharge port of the feed hopper (16) and a feed port of the receiving hopper (17) are respectively provided with bellows (18).

3. The waste salt microwave pyrolysis device according to claim 2, characterized in that: The outer wall of the cooling section (12-3) is provided with a cooling jacket (19), and a cooling coil (10) is provided inside the cooling jacket (19).

4. The waste salt microwave pyrolysis device according to claim 1, characterized in that: Every two adjacent stirring rods (22) are arranged perpendicular to each other, and the stirring rakes (23) at both ends of the same stirring rod (22) are inclined in different directions.

5. The waste salt microwave pyrolysis device according to claim 1, characterized in that: The fixed support seat (52) comprises a fixed bottom plate (52-1), a group of fixed support plates (52-2) are vertically arranged on the fixed bottom plate (52-1), the upper end of the fixed support plate (52-2) is movably equipped with a first rotating seat (52-3), and the fixed support plate (52-2) and the first rotating seat (52-3) are connected via a first latch (52-4); the movable adjustment seat (53) comprises a movable bottom plate (53-1), a group of movable support plates (53-2) are vertically arranged on the movable bottom plate (53-1), the upper end of the movable support plate (53-2) is movably equipped with a second rotating seat (53-3), and the movable support plate (53-2) and the second rotating seat (53-3) are connected via a second latch (53-4), and a guide groove is arranged on the lower side of the movable bottom plate (53-1).

6. The waste salt microwave pyrolysis device according to claim 5, characterized in that: The transverse plate of the support frame (51) is provided with a guide rail (54) and a strip hole parallel to the guide rail (54); the movable bottom plate (53-1) is mounted on the guide rail (54); bolts pass through the strip hole to connect the movable bottom plate (53-1) with the transverse plate of the support frame (51); and the fixed bottom plate (52-1) is mounted on the transverse plate of the support frame (51) by bolts.

7. The waste salt microwave pyrolysis device according to claim 1, characterized in that: A mounting seat (55) is provided on the vertical plate of the support frame (51), a mounting ring (56) is provided on the mounting seat (55), the feed hopper (16) and the feeder (15) are respectively installed in the mounting ring (56), a protective cover (57) is provided on the support frame (51), and a protective cover (58) is provided on the top of the protective cover (57).

8. The waste salt microwave pyrolysis device according to claim 1, characterized in that: A screw lift (59) is provided on the bottom plate of the support frame (51), the upper end of the telescopic rod of the screw lift (59) is connected to a rotating seat (50), and the rotating seat is connected to the lower wall of the furnace shell (11).

9. The waste salt microwave pyrolysis device according to claim 1, characterized in that: The invention also comprises a control system (6), wherein the control system (6) comprises a control cabinet, a touch screen (64), a plurality of thermocouples (61) arranged on the side wall of the furnace shell (11), and a flow meter (62) and a pressure gauge (63) arranged at the discharge end of the furnace shell (11); the control cabinet is electrically connected to the thermocouples (61), the flow meter (62), the pressure gauge (63), the microwave magnetron (31) and the feeder (15); and the touch screen (64) is connected to the microwave magnetron (31).

10. The waste salt microwave pyrolysis device according to claim 1, characterized in that: The pyrolysis chamber (12) is semi-cylindrical, the microwave chamber (13) is rectangular, and the microwave magnetron (31) is arranged on the two side walls and the upper side wall of the microwave chamber (13).

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