A continuous production germanium coal two-stage dry distillation device

Abstract

The utility model relates to germanium coal dry distillation technical field, concretely relates to a germanium coal two -stage dry distillation device of continuous production, including first section rotary dry distillation furnace and second section rotary dry distillation furnace, and the output side of first section rotary dry distillation furnace is connected with the input side of second section rotary dry distillation furnace through semi -coke filter device, and semi -coke filter device includes semi -coke filter box, and the downside of semi -coke filter box is the conical structure, and is connected with the input side of first screw conveyer, and the output side of first screw conveyer is connected with the input side of second section rotary dry distillation furnace, the lateral wall of semi -coke filter box is equipped with gas separation pipe, and gas separation pipe is set up to lean upwards, the utility model solves how to classify the technical problem of the product of germanium coal dry distillation extraction.

Description

Technical Field

[0001] This utility model relates to the field of germanium coal dry distillation technology, specifically to a two-stage dry distillation device for continuous production of germanium coal. Background Technology

[0002] Currently, germanium coal dry distillation technology converts germanium into coal gas, tar, and semi-coke through pyrolysis, and achieves high-temperature volatilization of germanium. It is an important way to comprehensively recover various valuable components of germanium coal. The germanium coal dry distillation process requires two stages. The first stage is low-temperature dry distillation, with the temperature mostly controlled between 400-600℃. The tar components in the germanium coal volatilize in a concentrated manner, and coal gas and semi-coke are obtained. The coal then enters the second stage of high-temperature dry distillation, where most of the germanium is released. The second stage of high-temperature dry distillation is at a temperature of 950-1200℃, which ultimately produces coke, as well as coal gas and germanium.

[0003] Chinese patent CN204490798U discloses a horizontal low-temperature dry distillation furnace suitable for lignite dry distillation; the furnace body is a hollow cylinder, one end of which is sealed to an inlet sealing device and the other end of which is sealed to an outlet sealing device. The inlet sealing device is connected to an air inlet pipe, and the outlet sealing device is connected to an electric safety pipe, a mechanical safety pipe, and an air outlet pipe, respectively. Furnace heating devices are evenly arranged inside the furnace body; the above-mentioned equipment cannot classify and extract the products of germanium coal dry distillation. Utility Model Content

[0004] This utility model provides a two-stage dry distillation device for continuous production of germanium coal, aiming to propose a two-stage dry distillation device for classifying and extracting the products of germanium coal dry distillation.

[0005] The technical solution used in this utility model is as follows: A two-stage dry distillation device for continuous production of germanium coal includes a first-stage rotary distillation furnace and a second-stage rotary distillation furnace. The output side of the first-stage rotary distillation furnace and the input side of the second-stage rotary distillation furnace are connected through a semi-coke filtration device. The semi-coke filtration device includes a semi-coke filtration box. The lower side of the semi-coke filtration box has a conical structure and is connected to the input side of a first screw conveyor. The output side of the first screw conveyor is connected to the input side of the second-stage rotary distillation furnace. A gas separation pipe is provided on the side wall of the semi-coke filtration box, and the gas separation pipe is inclined upward.

[0006] Furthermore, the other side of the gas separation pipe is connected to the cooling chamber, and the semi-coke filter box is connected to the cooling chamber; the cooling chamber is used to cool the tar and coal gas produced by the first stage rotary distillation furnace; the output end of the cooling chamber is equipped with a tar chamber, through which the gaseous tar is converted into liquid tar and stored in the tar chamber, and a coal gas main pipe is provided on the tar chamber, which is used to discharge the coal gas in the tar chamber.

[0007] Furthermore, the first-stage rotary distillation furnace includes a feeding seat, a discharging seat, and a distillation furnace body that is rotatably fitted between the feeding seat and the discharging seat.

[0008] Furthermore, a first sealing groove is provided on the side of the feeding seat; a material guiding channel is provided at the bottom of the first sealing groove; a first mud injection port and a feed port are provided on the upper side of the feeding seat, and the feed port is connected to the inside of the material guiding channel through the feed channel; the first mud injection port is connected to the inside of the sealing groove of the first sealing groove through the mud injection channel; a second sealing groove with a circular cross-section is provided on the side of the discharge seat, and a discharge channel (40) is provided on the lower side of the discharge seat, which is connected to the second sealing groove; an annular sealing retaining ring is fixed inside the second sealing groove; a second mud injection port is provided on the upper side of the discharge seat, and the second mud injection port is connected to the inside of the sealing groove of the second sealing groove through the mud injection channel; the dry distillation furnace body is an annular converter structure; the inner cavity of the dry distillation furnace body is provided with a furnace body spiral guide plate; dry Furnace shafts are fixed to both sides of the furnace body via crosses. One furnace shaft extends into the second sealing groove and rotates with the side wall of the discharge seat via bearings. The other furnace shaft extends into the material guide channel and rotates with the side wall of the discharge seat via bearings. A furnace body drive unit for driving the rotation of the furnace body is provided on one side of the discharge seat. Spiral feed blades are fixed on the furnace shaft in the material guide channel. A first sealing blade corresponding to the first sealing groove is provided on the outer side of the furnace body. A second sealing blade is provided on the other side of the furnace body and is located in the second sealing groove. The first and second sealing blades rotate in opposite directions, while the first sealing blade, the furnace body spiral guide blade, and the feed blade rotate in the same direction. The first-stage rotary distillation furnace and the second-stage rotary distillation furnace have the same structure.

[0009] Furthermore, the furnace body drive unit includes a support base and a drive motor mounted on the ground. The motor shaft of the drive motor is connected to the input end of the gearbox via a coupling. The end of the furnace shaft extends out of the side wall of the feeding seat and is connected to the output end of the gearbox via a coupling.

[0010] Furthermore, a receiving box for receiving wet coal slurry is provided on the lower side of the dry distillation furnace body. A mud pump is installed in the receiving box. The output end of the mud pump is connected to the first mud injection port and the second mud injection port through a wet mud pipe. The wet coal slurry on the dry distillation furnace body falls into the receiving box and is pumped into the first mud injection port and the second mud injection port by the mud pump.

[0011] Furthermore, the main gas pipe is connected to a first gas branch pipe and a second gas branch pipe; the first gas branch pipe is used to supply gas to the first semi-ring heating hood, which is used to heat the furnace body of the first stage rotary distillation furnace; the second gas branch pipe is used to supply gas to the second semi-ring heating hood, which is used to heat the furnace body of the second stage rotary distillation furnace.

[0012] Furthermore, the output side of the second-stage rotary distillation furnace is connected to the coke separation device, which includes a coke filter box. The upper side of the coke filter box is connected to the output side of the second-stage rotary distillation furnace, and the lower side of the coke filter box has a conical structure that is connected to the input side of the second screw conveyor. The side wall of the coke filter box is provided with a germanium separation pipe, which is inclined upward.

[0013] The beneficial effects achieved by this utility model are as follows: A two-stage rotary distillation furnace that can be used for the continuous production of powdered germanium coal and simultaneously recovers tar, coal gas, germanium concentrate, and coal gas. The first stage is a medium-low temperature distillation (mainly recovering tar and producing coal gas and semi-coke). The semi-coke from the first stage enters the second stage rotary distillation furnace for high-temperature distillation (mainly recovering germanium and producing coal gas and high-temperature semi-coke). The high-temperature gas products from each stage of the rotary distillation furnace are naturally filtered through a semi-coke particle layer to achieve dust removal. This device is of practical significance for the efficient and economical extraction of germanium from germanium coal, especially low-germanium lignite. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the two-stage dry distillation device for continuous production of germanium coal according to this utility model.

[0015] Figure 2 This is a schematic diagram of the semi-coke filtration device of this utility model.

[0016] Figure 3 This is a block diagram showing the connection between the cooling chamber and the tar chamber of this utility model.

[0017] Figure 4 This is a schematic cross-sectional view of the semi-coke filter box of this utility model.

[0018] Figure 5 This is a schematic diagram of the first stage rotary distillation furnace of this utility model.

[0019] Figure 6 This is a cross-sectional structural diagram of the feeding seat and discharge seat of this utility model.

[0020] Figure 7 This is a schematic diagram of the internal structure of the feeding seat of this utility model.

[0021] Figure 8 This is a schematic diagram of the position of the feed blades in this utility model.

[0022] Figure 9 This is a schematic diagram of the carbon separation device of this utility model.

[0023] Figure 10 This is a schematic diagram of the receiving box structure of this utility model.

[0024] In the diagram, 1. Support platform; 2. First-stage rotary distillation furnace; 3. Second-stage rotary distillation furnace; 4. Semi-coke filtration device; 5. Semi-coke filtration box; 6. First screw conveyor; 7. Gas separation pipe; 8. Cooling chamber; 9. Tar chamber; 10. Gas main pipe; 11. Feeding seat; 12. Discharge seat; 13. Distillation furnace body; 14. First sealing groove; 15. Material guiding channel; 16. First mud injection port; 17. Feed inlet; 18. Second sealing groove; 19. Sealing retaining ring; 20. Furnace body screw guide plate. 21. Furnace shaft; 22. Feed blade; 23. First sealing blade; 24. Second sealing blade; 25. First semi-ring heating hood; 26. Second semi-ring heating hood; 27. First gas branch pipe; 28. Second gas branch pipe; 29. ​​Support base; 30. Drive motor; 31. Gearbox; 32. Cross-shaped structure; 33. Coke filter box; 34. Second screw conveyor; 35. Germanium separator pipe; 36. Receiving box; 37. Slurry pump; 38. Wet slurry pipe; 39. Second slurry inlet; 40. Discharge channel. Detailed Implementation

[0025] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0027] like Figure 1 As shown, this utility model provides a two-stage dry distillation device for continuous production of germanium coal, including a first-stage rotary distillation furnace 2 and a second-stage rotary distillation furnace 3 mounted on a support platform 1. The output side of the first-stage rotary distillation furnace 2 and the input side of the second-stage rotary distillation furnace 3 are connected via a semi-coke filter device 4, which is used to input the semi-coke produced by the first-stage rotary distillation furnace 2 into the second-stage rotary distillation furnace 3; Figure 2 As shown, the semi-coke filtration device 4 includes a semi-coke filtration box 5, the upper side of which is connected to the output side of the first-stage rotary distillation furnace 2; the lower side of the semi-coke filtration box 5 is a conical structure, connected to the input side of the first screw conveyor 6, and the output side of the first screw conveyor 6 is connected to the input side of the second-stage rotary distillation furnace 3; as shown... Figure 3As shown, the side wall of the semi-coke filter box 5 is provided with a gas separation pipe 7. The gas separation pipe 7 is inclined upward to prevent semi-coke from entering the gas separation pipe 7 and causing blockage. The other side of the gas separation pipe 7 is connected to the cooling chamber 8, and the semi-coke filter box 5 is connected to the cooling chamber 8. The cooling chamber 8 is used to cool the tar (gaseous) and coal gas produced by the first stage rotary distillation furnace 2. The output end of the cooling chamber 8 is provided with a tar chamber 9. After passing through the cooling chamber 8, the gaseous tar is converted into liquid tar and stored in the tar chamber 9. The tar chamber 9 is provided with a coal gas main pipe 10, which is used to discharge the coal gas in the tar chamber 9.

[0028] like Figure 4 As shown, powdered germanium coal is added to the first-stage rotary distillation furnace 2 and subjected to distillation at 400-600℃. The resulting semi-coke and gaseous products (tar and coal gas) enter the semi-coke filtration device 4 together. At this time, the high-temperature gaseous products naturally pass through the semi-coke particle layer during the ascent. The porous structure of the semi-coke particles is used to physically intercept and filter the dust in the gas, achieving the purpose of dust removal. The filtered gas enters the cooling chamber 8 through the gas separation pipe 7, which is inclined upward on the side wall. The inclined gas separation pipe 7 can use gravity to prevent semi-coke particles from entering the pipe and causing blockage. The gaseous products are cooled in the cooling chamber 8. The gaseous tar is converted into liquid and stored in the tar chamber 9, while the coal gas is discharged through the coal gas main pipe 10 on the tar chamber 9, realizing the separation and collection of tar and coal gas. The filtered semi-coke falls to the bottom of the conical structure and is transported to the second-stage rotary distillation furnace 3 by the first screw conveyor 6 for further processing.

[0029] This application adopts a two-stage dry distillation structure. The semi-coke produced by the first-stage rotary dry distillation furnace 2 is filtered by the semi-coke filter device 4 and then directly fed into the second-stage rotary dry distillation furnace 3, realizing continuous material processing. At the same time, through the natural filtration design of the semi-coke particle layer, the physical structure of the semi-coke itself is used to remove dust from the high-temperature gas, eliminating the need for additional dust removal equipment, simplifying the system structure and reducing energy consumption. During the dust removal process, the semi-coke particle layer can fully contact the gas, effectively intercepting dust through physical actions such as inertial collision and sieving, improving gas purity, and providing a cleaner gas source for the subsequent tar condensation and gas separation in the cooling chamber 8, reducing the risk of dust wear on equipment and pipeline blockage. The conical structure of the semi-coke filter box 5, in conjunction with the first spiral conveyor 6, provides reasonable space for the formation of the semi-coke particle layer and gas filtration while realizing semi-coke conveying, so that the dust removal process and the material conveying process are naturally combined to form an integrated continuous production system.

[0030] like Figure 5-8As shown, the first-stage rotary distillation furnace 2 includes a feeding seat 11, a discharge seat 12, and a distillation furnace body 13 rotatably fitted between the feeding seat 11 and the discharge seat 12. A first sealing groove 14 with a circular cross-section is provided on the side of the feeding seat 11. A guide channel 15 with a circular cross-section is provided at the bottom of the first sealing groove 14. A first mud injection port 16 and a feed inlet 17 are provided on the upper side of the feeding seat 11. The feed inlet 17 has a conical structure and is connected to the inside of the guide channel 15 through the feed channel. The first mud injection port 16 is connected to the inside of the sealing groove of the first sealing groove 14 through the mud injection channel. Mud is injected into the sealing groove through the mud injection port. Wet coal slurry is introduced to seal the material; a second sealing groove 18 with a circular cross-section is provided on the side of the discharge seat 12, and a discharge channel 40 is provided on the lower side of the discharge seat 12, which is connected to the second sealing groove 18 and the upper side of the semi-coke filter box 5; an annular sealing retaining ring 19 is fixed inside the second sealing groove 18; a second mud injection port 39 is provided on the upper side of the discharge seat 12, which is connected to the inside of the sealing groove of the second sealing groove 18 through the mud injection channel; the dry distillation furnace body 13 is an annular converter structure; the inner cavity of the dry distillation furnace body 13 is provided with a furnace body spiral guide plate 20, and the dry distillation furnace body The rotating furnace body 13 transports germanium coal through the spiral guide plate 20 to the discharge channel 40 of the discharge seat 12. Furnace shafts 21 are fixed to both sides of the furnace body 13 via crosses 32. One furnace shaft 21 extends into the second sealing groove 18 and rotates with the side wall of the discharge seat 12 via bearings. The other furnace shaft 21 extends into the guide channel 15 and rotates with the side wall of the discharge seat 11 via bearings. A furnace body drive unit for driving the rotation of the furnace body 13 is provided on one side of the discharge seat 11. Spiral feed blades 22 are fixed on the furnace shaft 21 within the guide channel 15. The feed blades 22 transport the coal within the guide channel 15... The germanium coal is transferred to the interior of the dry distillation furnace body 13; the outer side of the dry distillation furnace body 13 is provided with a first sealing blade 23 corresponding to the first sealing groove 14. The first sealing blade 23 is spiral-shaped and is used to gradually rotate the wet coal slurry out of the first sealing groove 14, thereby performing a rotary seal; the other side of the dry distillation furnace body 13 is provided with a second sealing blade 24, which is located in the second sealing groove 18; the first sealing blade 23 and the second sealing blade 24 rotate in opposite directions, and the first sealing blade 23, the furnace body spiral guide plate 20 and the feed blade 22 rotate in the same direction; the first stage rotary dry distillation furnace 2 and the second stage rotary dry distillation furnace 3 have the same structure.

[0031] Powdered germanium coal enters through the feed inlet 17 (conical structure), falls into the guide channel 15 via the feed channel, and at this time, the spiral feed blades 22 on the furnace shaft 21 inside the guide channel 15 (with the same rotation direction as the furnace body spiral guide blades 20 and the first sealing blades 23) rotate, pushing the germanium coal into the interior of the dry distillation furnace body 13; the dry distillation furnace body 13 rotates under the drive of the furnace body drive unit, and the furnace body spiral guide blades 20 in its inner cavity rotate accordingly, conveying the germanium coal along the furnace body axis to the discharge channel 40 of the discharge seat 12, and finally into the semi-coke filter box 5; during this process, the first sealing groove 14 of the discharge seat 11 passes through the first Wet coal slurry is injected into the slurry inlet 16. When the first sealing blade 23 (spiral-shaped, with the same rotation direction as the feed blade 22) on the outside of the dry distillation furnace body 13 rotates, the wet coal slurry is gradually rotated out of the sealing groove, forming a dynamic sealing layer to prevent gas leakage from the dry distillation furnace body 13. In the second sealing groove 18 of the discharge seat 12, the second sealing blade 24 (with the opposite rotation direction to the first sealing blade 23) cooperates with the sealing retaining ring 19 to achieve rotational sealing at the discharge end. The furnace shaft 21, which is fixed on both sides of the dry distillation furnace body 13 by the cross 32, rotates through bearings in the feed channel 15 and the second sealing groove 18 respectively to ensure that the furnace body rotates smoothly.

[0032] like Figure 3 As shown, the dry distillation furnace body 13 can be heated by existing direct heating, gas flow heating, electric heating, etc.; it can also be heated by separated coal gas; the main coal gas pipe 10 is connected to a first coal gas branch pipe 27 and a second coal gas branch pipe 28; the first coal gas branch pipe 27 is used to supply coal gas to the first semi-ring heating hood 25, and the first semi-ring heating hood 25 is used to heat the dry distillation furnace body 13 of the first stage rotary dry distillation furnace 2; the second coal gas branch pipe 28 is used to supply coal gas to the second semi-ring heating hood 26, and the second semi-ring heating hood 26 is used to heat the dry distillation furnace body 13 of the second stage rotary dry distillation furnace 3.

[0033] like Figure 5 As shown, the furnace body drive unit is used to drive the dry distillation furnace body 13 to rotate. The furnace body drive unit includes a support base 29 and a drive motor 30 mounted on the ground. The motor shaft of the drive motor 30 is connected to the input end of the gearbox 31 through a coupling. The end of the furnace shaft 21 extends out of the side wall of the feeding seat 11 and is connected to the output end of the gearbox 31 through a coupling. After the drive motor 30 is reduced in speed and increased in torque by the gearbox 31, it drives the dry distillation furnace body 13 to rotate.

[0034] like Figure 9As shown, the output side of the second-stage rotary distillation furnace 3 is connected to the coke separation device, which includes a coke filter box 33. The upper side of the coke filter box 33 is connected to the output side of the second-stage rotary distillation furnace 3, and the lower side of the coke filter box 33 is a conical structure connected to the input side of the second screw conveyor 34. The side wall of the coke filter box 33 is provided with a germanium separation pipe 35, which is inclined upward to prevent coke from entering the germanium separation pipe 35 and causing blockage. The high-temperature semi-coke generated by the second-stage rotary distillation furnace 3 is discharged to the next process through the second screw conveyor 34, and the generated germanium and coal gas are discharged through the germanium separation pipe 35 and separated in the next process.

[0035] Considering the issue of reusing wet coal slime, such as Figure 10 As shown, a receiving box 36 for receiving wet coal slurry is provided on the lower side of the dry distillation furnace body 13. A mud pump 37 (which can be a screw pump) is provided inside the receiving box 36. The output end of the mud pump 37 is connected to the first mud injection port 16 and the second mud injection port 39 through a wet mud pipe 38. The wet coal slurry on the dry distillation furnace body 13 falls into the receiving box 36 and is pumped into the first mud injection port 16 and the second mud injection port 39 by the mud pump 37 for reuse.

[0036] Unless otherwise specified, the above methods of fixing all use common technical means employed by industry professionals, such as welding, nesting, or threaded fixing.

[0037] The following points need to be explained:

[0038] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0039] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "below" another element, the element may be "directly" located "on" or "below" the other element or there may be intermediate elements.

[0040] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A two-stage dry distillation apparatus for continuous production of germanium coal, characterized in that, It includes a first-stage rotary distillation furnace (2) and a second-stage rotary distillation furnace (3). The output side of the first-stage rotary distillation furnace (2) and the input side of the second-stage rotary distillation furnace (3) are connected through a semi-coke filter device (4). The semi-coke filter device (4) includes a semi-coke filter box (5). The lower side of the semi-coke filter box (5) is a conical structure and is connected to the input side of the first screw conveyor (6). The output side of the first screw conveyor (6) is connected to the input side of the second-stage rotary distillation furnace (3). The side wall of the semi-coke filter box (5) is provided with a gas separation pipe (7), which is inclined upward.

2. The two-stage dry distillation apparatus for continuous production of germanium coal according to claim 1, characterized in that, The other side of the gas separation pipe (7) is connected to the cooling chamber (8), and the semi-coke filter box (5) is connected to the cooling chamber (8). The cooling chamber (8) is used to cool the tar and coal gas produced by the first stage rotary distillation furnace (2). The output end of the cooling chamber (8) is provided with a tar chamber (9). After passing through the cooling chamber (8), the gaseous tar is converted into liquid tar and stored in the tar chamber (9). The tar chamber (9) is provided with a coal gas main pipe (10), which is used to discharge the coal gas in the tar chamber (9).

3. The two-stage dry distillation apparatus for continuous production of germanium coal according to claim 1, characterized in that, The first section of the rotary distillation furnace (2) includes a feeding seat (11), a discharge seat (12), and a distillation furnace body (13) rotatably fitted between the feeding seat (11) and the discharge seat (12).

4. The two-stage dry distillation apparatus for continuous production of germanium coal according to claim 3, characterized in that, The side of the feeding seat (11) is provided with a first sealing groove (14); the bottom of the first sealing groove (14) is provided with a guide channel (15); the upper side of the feeding seat (11) is provided with a first mud injection port (16) and a feed inlet (17), the feed inlet (17) is connected to the inside of the guide channel (15) through the feed channel; the first mud injection port (16) is connected to the inside of the sealing groove of the first sealing groove (14) through the mud injection channel; the side of the discharge seat (12) is provided with a second sealing groove (18) with a circular cross section, the discharge seat (12) has a discharge channel (40) on its lower side, which is connected to the second sealing groove (18); the inner side of the second sealing groove (18) is fixed with an annular sealing retaining ring (19); the upper side of the discharge seat (12) has a second mud injection port (39), which is connected to the inside of the sealing groove of the second sealing groove (18) through the mud injection channel; the dry distillation furnace body (13) is an annular converter structure; the inner cavity of the dry distillation furnace body (13) is provided with a furnace body spiral guide plate (20); the dry distillation furnace body (13) has two A furnace shaft (21) is fixed to one side by a cross (32). One side of the furnace shaft (21) extends into the second sealing groove (18) and rotates with the side wall of the discharge seat (12) via a bearing. The other side of the furnace shaft (21) extends into the material guide channel (15) and rotates with the side wall of the discharge seat (11) via a bearing. A furnace body drive unit for driving the rotation of the dry distillation furnace body (13) is provided on one side of the discharge seat (11). A spiral feed blade (22) is fixed on the furnace shaft (21) in the material guide channel (15). The outer side of the furnace body (13) is provided with a first sealing blade (23) corresponding to the first sealing groove (14); the other side of the dry distillation furnace body (13) is provided with a second sealing blade (24), which is located in the second sealing groove (18); the first sealing blade (23) and the second sealing blade (24) rotate in opposite directions, and the first sealing blade (23), the furnace body spiral guide plate (20) and the feed blade (22) rotate in the same direction; the first stage rotary dry distillation furnace (2) and the second stage rotary dry distillation furnace (3) have the same structure.

5. A two-stage dry distillation apparatus for continuous production of germanium coal according to claim 4, characterized in that, The furnace body drive unit includes a support base (29) and a drive motor (30) located on the ground. The motor shaft of the drive motor (30) is connected to the input end of the gearbox (31) through a coupling. The end of the furnace shaft (21) extends out of the side wall of the feeding seat (11) and is connected to the output end of the gearbox (31) through a coupling.

6. A two-stage dry distillation apparatus for continuous production of germanium coal according to claim 3, characterized in that, The lower side of the dry distillation furnace body (13) is provided with a receiving box (36) for receiving wet coal slurry. A mud pump (37) is provided in the receiving box (36). The output end of the mud pump (37) is connected to the first mud injection port (16) and the second mud injection port (39) respectively through a wet mud pipe (38). The wet coal slurry on the dry distillation furnace body (13) falls into the receiving box (36) and is pumped into the first mud injection port (16) and the second mud injection port (39) by the mud pump (37).

7. A two-stage dry distillation apparatus for continuous production of germanium coal according to claim 2, characterized in that, The main gas pipe (10) is connected to a first gas branch pipe (27) and a second gas branch pipe (28); the first gas branch pipe (27) is used to supply gas to the first semi-ring heating hood (25), and the first semi-ring heating hood (25) is used to heat the furnace body (13) of the first stage rotary distillation furnace (2); the second gas branch pipe (28) is used to supply gas to the second semi-ring heating hood (26), and the second semi-ring heating hood (26) is used to heat the furnace body (13) of the second stage rotary distillation furnace (3).

8. A two-stage dry distillation apparatus for continuous production of germanium coal according to claim 1, characterized in that, The output side of the second-stage rotary distillation furnace (3) is connected to the coke separation device, which includes a coke filter box (33). The upper side of the coke filter box (33) is connected to the output side of the second-stage rotary distillation furnace (3), and the lower side of the coke filter box (33) is a conical structure connected to the input side of the second screw conveyor (34). The side wall of the coke filter box (33) is provided with a germanium separation pipe (35), which is inclined upward.

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