Pressurized gasification furnace for coal chemical industry

Abstract

The invention relates to the technical field of coal chemical industry, and discloses a coal chemical industry pressurized gasification furnace which comprises a furnace body, and a feeding pipe used for adding pulverized coal into the furnace body is arranged at the top end of the furnace body; an upper partition plate is arranged at the position, above the feeding pipe, of the top end of the furnace body, a lower partition plate assembly is arranged at the position, below the feeding pipe, in the furnace body, the upper partition plate and the lower partition plate assembly are connected through a main connecting shaft penetrating through the feeding pipe, and a lifting control assembly is arranged on the furnace body and used for controlling the main connecting shaft to ascend and descend. An air cylinder is arranged on the lifting control assembly to control the upper partition plate to ascend and descend, and an in-pipe cleaning assembly is arranged on the inner circumferential face of the feeding pipe and connected with the main connecting shaft. The upper partition plate and the lower partition plate assembly are arranged to block the input port and the output port of the feeding pipe of the furnace body, the lower partition plate assembly is controlled to block the output port in the bottom end of the feeding pipe when materials are fed into the feeding pipe, and therefore gas in the furnace body can be prevented from blowing out a large amount of pulverized coal in the feeding pipe.

Description

Technical Field

[0001] The invention relates to the technical field of coal chemical industry, and in particular to a coal chemical industry pressurized gasification furnace. Background Art

[0002] A coal gasifier, also known as a coal gasifier, is a technology that uses carbon-containing materials such as coal or coke as raw materials, air and water vapor as gasifying agents, and gasifies them in a fixed-bed coal gasifier at normal pressure to obtain combustible gas. The main components of the generated gas are carbon monoxide, hydrogen, nitrogen, and carbon dioxide, and the combustible components are carbon monoxide and hydrogen.

[0003] In the prior art, for example, Chinese patent publication number CN114854450A proposes a coal chemical pressurized gasification furnace, which includes a furnace body, an injection mechanism, a heating mechanism, a cooling mechanism, a driving mechanism, an exhaust mechanism, a blocking mechanism and a boost valve. The coal gas pushes part of the coal powder to move upward, and the blocking mechanism retains the coal powder in the interior of the furnace body. The coal gas penetrates the blocking mechanism and is discharged from the interior of the furnace body through the exhaust mechanism. At this time, the driving mechanism continuously moves to push the coal powder to continuously fall into the interior of the furnace body. At the same time, the driving mechanism drives the blocking mechanism to continuously move upward, and the blocking mechanism blocks the exhaust mechanism when moving upward.

[0004] The gas in the gasifier is mainly output through the exhaust pipe, and part of the gas is also discharged through the feed pipe when coal powder is input. The gas carrying coal powder into the exhaust pipe may block the pipe, and the gas carrying coal powder discharged through the feed pipe will pollute the environment. In the prior art, the exhaust pipe is generally improved to prevent blockage, but the feed pipe is not improved to prevent the gas from carrying coal powder. Therefore, there is an urgent need for a gasifier that can limit the gas from discharging from the furnace body through the feed pipe and prevent the feed pipe from being blocked by coal powder. Summary of the invention

[0005] The object of the present invention is to provide a coal chemical pressurized gasification furnace to solve the problem in the prior art that the feed pipe is not improved to prevent the gas from carrying coal powder.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A coal chemical pressurized gasification furnace, comprising a furnace body, wherein a ventilation mechanism and a heating mechanism are sequentially arranged inside the furnace body from bottom to top, wherein the ventilation mechanism is used to introduce a gasifying agent into the furnace body, and the heating mechanism is used to heat the inside of the furnace body, wherein a pressurizing mechanism and a cooling mechanism are arranged on one side of the furnace body, wherein the pressurizing mechanism is used to pressurize the inside of the furnace body, and the cooling mechanism is connected to the heating mechanism and is used to cool the heating mechanism, wherein an exhaust mechanism for exhausting gas inside the furnace body is arranged on the top of the furnace body, and a feeding pipe for adding coal powder into the inside of the furnace body is arranged at the top of the furnace body;

[0008] An upper baffle is provided above the feed pipe, a lower baffle assembly is provided below the feed pipe, a main connecting shaft for connecting the upper baffle and the lower baffle assembly is provided on the inner side of the feed pipe, a lifting control assembly for controlling the lifting of the main connecting shaft is provided on the top of the furnace body, a cylinder for controlling the lifting of the upper baffle is provided on the lifting control assembly, and an in-tube cleaning assembly for covering the inner circumferential surface of the feed pipe is provided on the main connecting shaft.

[0009] As a preferred solution of the present invention, the outer circumferential surface of the main coupling shaft is provided with an external thread segment, an upper annular groove and a lower annular groove in sequence from top to bottom;

[0010] The external thread section is used to sleeve the lifting control assembly, and two protrusions for contacting the lifting control assembly are provided on the outer side of the main connecting shaft. The two protrusions are respectively located at the top and bottom ends of the external thread section. The upper annular groove is used to sleeve the in-tube cleaning assembly and limit the height position of the in-tube cleaning assembly on the main connecting shaft, and the lower annular groove is used to sleeve the lower baffle assembly and limit the height position of the lower baffle assembly on the main connecting shaft.

[0011] As a preferred solution of the present invention, a plurality of upper arc grooves extending downward are provided at the top of the feed pipe, and the plurality of upper arc grooves are evenly distributed around the feed pipe. A plurality of inner arc grooves are provided on the inner circumferential surface of the feed pipe, and the plurality of inner arc grooves correspond one-to-one to each of the upper arc grooves, and each of the inner arc grooves is used to connect to the bottom end of the corresponding upper arc groove.

[0012] As a preferred solution of the present invention, the in-pipe cleaning assembly includes a plurality of annular inner membranes passing through each of the upper arc grooves and the corresponding inner arc grooves, each of the annular inner membranes is connected to a connecting rod extending toward the main connecting shaft, and the ends of the plurality of connecting rods are commonly connected to an upper sleeve for movably sleeved on the upper annular groove.

[0013] As a preferred solution of the present invention, the lifting control assembly includes a mounting frame fixedly connected to the top of the furnace body, a rotating drum for sleeved with the main connecting shaft is rotatably connected to the mounting frame, a motor is installed on the mounting frame, a transmission wheel is sleeved on the output end of the motor, and a transmission belt is sleeved on the transmission wheel and the rotating drum;

[0014] The cylinder is mounted on the mounting frame, and the output end of the cylinder passes through the mounting frame and is connected to the upper partition.

[0015] As a preferred solution of the present invention, the inner circumferential surface of the rotating drum is provided with an internal thread connected to the external thread section on the main connecting shaft, and the outer circumferential surface of the rotating drum is provided with a belt groove and an annular groove from top to bottom in sequence, the rotating drum is sleeved with the transmission belt through the belt groove, and the annular groove of the rotating drum is rotatably connected to the mounting frame through a bearing;

[0016] When the rotating drum rotates to the top end or the bottom end of the external thread section, it can rotate synchronously with the main connecting shaft.

[0017] As a preferred solution of the present invention, the lower partition assembly includes a lower hopper fixedly connected to the bottom end of the main connecting shaft, a bucket surface cleaning assembly for cleaning the outside of the lower hopper is provided on the lower hopper, and a vertically distributed limit rod is fixedly connected to the inside of the furnace body, and the limit rod is used to limit the bucket surface cleaning assembly at any height.

[0018] As a preferred solution of the present invention, the lower hopper is conical, the top center position of the lower hopper is fixedly connected to the bottom end of the main connecting shaft, and the bottom diameter of the lower hopper is larger than the output port diameter of the feed pipe.

[0019] As a preferred solution of the present invention, the bucket surface cleaning assembly includes a positioning column fixedly connected to the center position of the bottom end of the lower hopper, and the outer side of the positioning column is rotatably connected to an adapter ring, and the adapter ring is provided with a strip blade that fits on the outer conical surface of the lower hopper, and the top of the strip blade is provided with a lower sleeve for movably sleeved on the lower ring groove, the adapter ring is fixedly connected to the limit rod, and the adapter ring is movably sleeved on the limit rod by providing a limit sleeve rod.

[0020] As a preferred solution of the present invention, the strip blade is parallel to the outer conical surface of the lower hopper, and both side surfaces of the strip blade are in contact with the outer conical surface of the lower hopper.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention provides an upper baffle and a lower baffle assembly for blocking the input port and the output port of the furnace body feed pipe. When feeding into the feed pipe, the lower baffle assembly is controlled to block the output port at the bottom end of the feed pipe, thereby preventing the gas in the furnace body from blowing out a large amount of coal powder in the feed pipe. When the coal powder in the feed pipe is fed into the furnace body, the upper baffle is controlled to block the input port at the top end of the feed pipe, and then the lower baffle assembly is controlled to stop blocking the output port of the feed pipe, so that the coal powder in the feed pipe can enter the furnace body, and the gas in the furnace body will not blow the coal powder out of the furnace body from the feed pipe;

[0023] (2) The present invention provides a flippable in-tube cleaning assembly on the inner wall of the feed pipe to contact the coal powder in the feed pipe, and the in-tube cleaning assembly can automatically clean the coal powder remaining on the surface by utilizing the lifting and lowering of the main connecting shaft; in addition, the lower baffle assembly can automatically clean the coal powder remaining on its surface by utilizing the lifting and lowering of the main connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0025] Figure 1 It is a cross-sectional view of the entire device of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of a part of the device of the present invention.

[0027] Figure 3 It is a cross-sectional view of the rotary drum of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the main connecting shaft of the present invention.

[0029] Figure 5 It is a structural cross-sectional view of the lower baffle assembly of the present invention.

[0030] Figure 6 It is a structural cross-sectional view of the feed pipe of the present invention.

[0031] Figure 7 It is an enlarged view of point A of the present invention.

[0032] Reference numerals:

[0033] 1. Furnace body; 2. Feed pipe; 3. Upper baffle; 4. Lower baffle assembly; 5. Main connecting shaft; 6. Lifting control assembly; 7. Cylinder; 8. Pipe cleaning assembly;

[0034] 21. Upper arc groove; 22. Inner arc groove;

[0035] 41. lower hopper; 42. hopper surface cleaning assembly; 43. connecting frame;

[0036] 421, positioning column; 422, adapter ring; 423, strip blade; 424, lower sleeve; 425, limit sleeve rod;

[0037] 51. External thread segment; 52. Upper annular groove; 53. Lower annular groove; 54. Protrusion;

[0038] 61. mounting frame; 62. rotating drum; 63. motor; 64. transmission wheel; 65. transmission belt;

[0039] 621, belt groove; 622, annular groove; 623, bearing;

[0040] 81. Annular inner membrane; 82. Connecting rod; 83. Upper sleeve. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0042] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0043] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Combine the following Figures 1 to 7As shown, an embodiment of the present invention provides a coal chemical pressurized gasification furnace, including a furnace body 1, wherein a ventilation mechanism and a heating mechanism are sequentially arranged inside the furnace body 1 from bottom to top, the ventilation mechanism is used to introduce a gasifying agent into the furnace body 1, the heating mechanism is used to heat the inside of the furnace body 1, a pressurizing mechanism and a cooling mechanism are arranged on one side of the furnace body 1, the pressurizing mechanism is used to increase the pressure inside the furnace body 1, the cooling mechanism is connected to the heating mechanism and is used to cool the heating mechanism, an exhaust mechanism for discharging the gas inside the furnace body 1 is arranged on the top of the furnace body 1, and a feeding pipe 2 for adding coal powder to the inside of the furnace body 1 is arranged at the top of the furnace body 1.

[0047] Specifically, in the field of coal chemical industry, the gasifier needs to provide a high-temperature and pressurized environment for the coal powder, and provide a gasifying agent to react with the coal powder, thereby converting it into a gas product. Therefore, the above contents are all conventional technical means in the prior art and will not be elaborated here. The present invention mainly improves the feed part of the gasifier to prevent the gas in the gasifier from carrying a large amount of coal powder and spraying out of the gas furnace body 1 from the feed port.

[0048] An upper baffle plate 3 is provided above the feed pipe 2, a lower baffle plate assembly 4 is provided below the feed pipe 2, a main connecting shaft 5 for connecting the upper baffle plate 3 and the lower baffle plate assembly 4 is provided on the inner side of the feed pipe 2, a lifting control assembly 6 for controlling the lifting of the main connecting shaft 5 is provided at the top of the furnace body 1, a cylinder 7 for controlling the lifting of the upper baffle plate 3 is provided on the lifting control assembly 6, and an inner tube cleaning assembly 8 for covering the inner circumferential surface of the feed pipe 2 is provided on the main connecting shaft 5.

[0049] The present invention provides an upper baffle 3 and a lower baffle assembly 4 for blocking the input port and output port of the feed pipe 2 of the furnace body 1. When feeding into the feed pipe 2, the lower baffle assembly 4 is controlled to block the output port at the bottom end of the feed pipe 2, thereby preventing the gas in the furnace body 1 from blowing out a large amount of coal powder in the feed pipe 2. When the coal powder in the feed pipe 2 is fed into the furnace body 1, the upper baffle 3 is controlled to block the input port at the top end of the feed pipe 2, and then the lower baffle assembly 4 is controlled not to block the output port of the feed pipe 2, so that the coal powder in the feed pipe 2 can enter the furnace body 1, and the gas in the furnace body 1 will not blow the coal powder out of the furnace body from the feed pipe 2.

[0050] The present invention provides a flippable in-tube cleaning assembly 8 on the inner wall of the feed pipe 2 for contacting the coal powder in the feed pipe 2, and the in-tube cleaning assembly 8 can automatically clean the coal powder remaining on the surface by utilizing the lifting and lowering of the main connecting shaft 5; in addition, the lower baffle assembly 4 can automatically clean the coal powder remaining on its surface by utilizing the lifting and lowering of the main connecting shaft 5.

[0051] The outer circumferential surface of the main connecting shaft 5 is provided with an external thread section 51, an upper annular groove 52 and a lower annular groove 53 in sequence from top to bottom;

[0052] The external thread section 51 is used to sleeve the lifting control assembly 6. Two protrusions 54 for contacting the lifting control assembly 6 are provided on the outer side of the main connecting shaft 5. The two protrusions 54 are respectively located at the top and bottom ends of the external thread section 51. The upper annular groove 52 is used to sleeve the tube cleaning assembly 8 and limit the height position of the tube cleaning assembly 8 on the main connecting shaft 5. The lower annular groove 53 is used to sleeve the lower partition assembly 4 and limit the height position of the lower partition assembly 4 on the main connecting shaft 5.

[0053] Specifically, the main function of the main coupling 5 is to rise and fall synchronously with the lower baffle assembly 4 connected to its bottom end to block or open the bottom output port of the feed pipe 2. The lifting control assembly 6 is connected to the main coupling through the external threaded section 51 to control the lifting of the main coupling 5. During the lifting process of the main coupling 5, the upper ring groove 52 controls the synchronous lifting of the sleeved in-tube cleaning assembly 8, and the in-tube cleaning assembly 8 can clean the residual coal powder thereon during the lifting process.

[0054] Among them, a plurality of upper arc grooves 21 extending downward are opened at the top of the feed pipe 2, and the plurality of upper arc grooves 21 are evenly distributed around the feed pipe 2. A plurality of inner arc grooves 22 are opened on the inner circumferential surface of the feed pipe 2, and the plurality of inner arc grooves 22 correspond to each upper arc groove 21 one by one, and each inner arc groove 22 is used to connect to the bottom end of the corresponding upper arc groove 21.

[0055] The in-pipe cleaning assembly 8 includes a plurality of annular inner membranes 81 passing through each upper arc groove 21 and the corresponding inner arc groove 22. Each annular inner membrane 81 is connected to a connecting rod 82 extending toward the main connecting shaft 5. The ends of the plurality of connecting rods 82 are commonly connected to an upper sleeve 83 for movably sleeved on the upper annular groove 52.

[0056] Specifically, the essence of the self-cleaning of the in-pipe cleaning component 8 by the lifting and lowering of the main coupling 5 is to use the annular inner film 81 to cover most of the inner circumference of the feed pipe. Therefore, an upper arc groove 21 is opened on the feed pipe 2, and an inner arc groove 22 connected to the upper arc groove 21 is opened on the inner side of the feed pipe. The annular inner film 81 passes through the upper arc groove 21 and the corresponding inner arc groove 22 to cover the corresponding coverage area of ​​the annular inner film 81 in the feed pipe 2. Each annular inner film 81 is connected to the same sleeve 83 through a connecting rod 82, and the height of the sleeve 83 on the main coupling 5 is fixed. Therefore, when the main coupling 5 is lifted or lowered, it will be lifted or lowered synchronously together with the sleeve 83 and each connecting rod 82. At this time, each connecting rod 82 will control each annular inner film 81 to flip in the corresponding upper arc groove 21 and inner arc groove 22 through the connection point with each annular inner film 81. Therefore, the coal powder remaining on the annular inner film 81 is blocked when entering the upper arc groove 21 and the inner arc groove 22.

[0057] The lifting control assembly 6 includes a mounting frame 61 fixedly connected to the top of the furnace body 1, a rotating drum 62 for sleeved with the main connecting shaft 5 is rotatably connected to the mounting frame 61, a motor 63 is installed on the mounting frame 61, a transmission wheel 64 is sleeved on the output end of the motor 63, and a transmission belt 65 is sleeved on the transmission wheel 64 and the rotating drum 62;

[0058] The cylinder 7 is mounted on the mounting frame 61 , and the output end of the cylinder 7 passes through the mounting frame 61 and is connected to the upper partition plate 3 .

[0059] The inner circumferential surface of the rotating drum (62) is provided with an internal thread connected to the external thread section (51) on the main connecting shaft (5), and the outer circumferential surface of the rotating drum 62 is provided with a belt groove 621 and an annular groove 622 in sequence from top to bottom. The rotating drum 62 is sleeved with a transmission belt 65 through the belt groove 621, and the annular groove 622 of the rotating drum 62 is rotatably connected to the mounting frame 61 through a bearing 623;

[0060] When the rotating drum 62 rotates to the top end or the bottom end of the external thread section 51 , it can rotate synchronously with the main coupling shaft 5 .

[0061] Specifically, since it is necessary to achieve the purpose of preventing the gas in the furnace body 1 from being discharged in large quantities through the feed pipe 2 when the top input port or the bottom output port of the feed pipe 2 is opened, the main connecting shaft 5 directly controls the lifting and lowering of the lower partition assembly 4, and the cylinder 7 independently controls the lifting and lowering of the upper partition 3, and the lower partition assembly 4 cannot be lifted and lowered synchronously with the upper partition 3, so the lifting and lowering of the upper partition 3 is controlled by the cylinder 7 alone to block or open the top input port of the feed pipe 2; the motor 63 drives the transmission wheel 64 and the transmission belt 65 to rotate together with the rotating drum 62, and the rotating rotating drum 62 controls the lifting and lowering of the main connecting shaft 5 under the action of the internal thread and the external thread section 51 on the main connecting shaft 5.

[0062] Furthermore, since the lifting control assembly 6 controls the lifting and lowering of the main coupling 5 by means of the rotating drum 62 and the external threaded section 51, the contact portion between the drum 62 and the external threaded section 51 will move up and down. When the drum 62 moves to the top or bottom of the external threaded section 51, it will abut against the protrusion 54. Under the premise that the drum 62 does not stop rotating, the drum 62 will rotate synchronously with the main coupling 5 and the lower partition assembly 4. The rotation of the main coupling 5 provides power for the self-cleaning of the surface of the lower partition assembly 4.

[0063] Among them, the lower partition assembly 4 includes a lower hopper 41 fixedly connected to the bottom end of the main connecting shaft 5, and a bucket surface cleaning assembly 42 for cleaning the outside of the lower hopper 41 is provided on the lower hopper 41. A vertically distributed limit rod 43 is fixedly connected to the inside of the furnace body 1, and the limit rod 43 is used to limit the bucket surface cleaning assembly 42 at any height.

[0064] The lower hopper 41 is conical in shape, the top center position of the lower hopper 41 is fixedly connected to the bottom end of the main connecting shaft 5 , and the bottom diameter of the lower hopper 41 is larger than the output port diameter of the feed pipe 2 .

[0065] The bucket surface cleaning assembly 42 includes a positioning column 421 fixedly connected to the center position of the bottom end of the lower hopper 41, and an adapter ring 422 is rotatably connected to the outer side of the positioning column 421. The adapter ring 422 is provided with a strip blade 423 that fits on the outer conical surface of the lower hopper 41, and the top of the strip blade 423 is provided with a lower sleeve 424 for movably sleeved on the lower ring groove 53. The adapter ring 422 is fixedly connected to the limit rod 43, and the adapter ring 422 is movably sleeved on the limit rod 43 by a limit sleeve rod 425.

[0066] The strip blade 423 is parallel to the outer conical surface of the lower hopper 41 , and both side surfaces of the strip blade 423 are in contact with the outer conical surface of the lower hopper 41 .

[0067] Specifically, since the limit rod 43 is fixed inside the furnace body 1 and passes through the limit sleeve 425, the angle of the bucket surface cleaning assembly 42 is fixed relative to the lower hopper 41. When the main connecting shaft 5 controls the lower hopper 41 to rotate, the adapter ring 422, the strip blade 423, the lower sleeve 424 and the limit sleeve 425 on the bucket surface cleaning assembly 42 do not rotate. Therefore, the strip blade 423 attached to the outer conical surface of the lower hopper 41 will continue to scrape off the remaining coal powder on the outer conical surface of the lower hopper 41.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal chemical pressurized gasification furnace, comprising a furnace body (1), wherein a ventilation mechanism and a heating mechanism are sequentially arranged inside the furnace body (1) from bottom to top, wherein the ventilation mechanism is used to introduce a gasifying agent into the furnace body (1), and the heating mechanism is used to heat the inside of the furnace body (1); a pressurizing mechanism and a cooling mechanism are arranged on one side of the furnace body (1), wherein the pressurizing mechanism is used to increase the pressure inside the furnace body (1), and the cooling mechanism is connected to the heating mechanism and is used to cool the heating mechanism; an exhaust mechanism for exhausting gas inside the furnace body (1) is arranged on the top of the furnace body (1), wherein the exhaust mechanism is used to exhaust gas from the furnace body (1), and the furnace body (1) is characterized in that: A feeding pipe (2) for adding coal powder into the interior of the furnace body (1) is provided at the top end of the furnace body (1); An upper baffle (3) is provided above the feed pipe (2), a lower baffle assembly (4) is provided below the feed pipe (2), a main connecting shaft (5) for connecting the upper baffle (3) and the lower baffle assembly (4) is provided on the inner side of the feed pipe (2), a lifting control assembly (6) for controlling the lifting of the main connecting shaft (5) is provided at the top of the furnace body (1), a cylinder (7) for controlling the lifting of the upper baffle (3) is provided on the lifting control assembly (6), and an inner tube cleaning assembly (8) for covering the inner circumferential surface of the feed pipe (2) is provided on the main connecting shaft (5).

2. A coal chemical pressurized gasifier according to claim 1, characterized in that: The outer circumferential surface of the main connecting shaft (5) is provided with an external thread section (51), an upper annular groove (52) and a lower annular groove (53) in sequence from top to bottom; The external thread section (51) is used for sleeve-engaging the lifting control assembly (6); the outer side of the main connecting shaft (5) is provided with two protrusions (54) for contacting the lifting control assembly (6); the two protrusions (54) are respectively located at the top and bottom ends of the external thread section (51); the upper annular groove (52) is used for sleeve-engaging the in-tube cleaning assembly (8) and defining the height position of the in-tube cleaning assembly (8) on the main connecting shaft (5); the lower annular groove (53) is used for sleeve-engaging the lower baffle assembly (4) and defining the height position of the lower baffle assembly (4) on the main connecting shaft (5).

3. A coal chemical pressurized gasifier according to claim 2, characterized in that: The top of the feed pipe (2) is provided with a plurality of upper arc-shaped grooves (21) extending downward, and the plurality of upper arc-shaped grooves (21) are evenly distributed around the feed pipe (2). The inner circumferential surface of the feed pipe (2) is provided with a plurality of inner arc-shaped grooves (22), and the plurality of inner arc-shaped grooves (22) correspond one-to-one to each of the upper arc-shaped grooves (21), and each of the inner arc-shaped grooves (22) is used to communicate with the bottom end of the corresponding upper arc-shaped groove (21).

4. A coal chemical pressurized gasifier according to claim 3, characterized in that: The in-pipe cleaning assembly (8) comprises a plurality of annular inner membranes (81) passing through each of the upper arc-shaped grooves (21) and the corresponding inner arc-shaped grooves (22), each of the annular inner membranes (81) being connected to a connecting rod (82) extending toward the main connecting shaft (5), and the ends of the plurality of connecting rods (82) being commonly connected to an upper sleeve (83) for movably sleeved on the upper annular groove (52).

5. A coal chemical pressurized gasifier according to claim 2, characterized in that: The lifting control assembly (6) comprises a mounting frame (61) fixedly connected to the top of the furnace body (1); a rotating drum (62) for sleeve-engaging the main connecting shaft (5) is rotatably connected to the mounting frame (61); a motor (63) is mounted on the mounting frame (61); a transmission wheel (64) is sleeve-engaged on the output end of the motor (63); and a transmission belt (65) is sleeve-engaged on the transmission wheel (64) and the rotating drum (62); The cylinder (7) is mounted on the mounting frame (61), and the output end of the cylinder (7) passes through the mounting frame (61) and is connected to the upper partition plate (3).

6. A coal chemical pressurized gasifier according to claim 5, characterized in that: The inner circumferential surface of the rotating drum (62) is provided with an internal thread connected to the external thread section (51) on the main connecting shaft (5); the outer circumferential surface of the rotating drum (62) is provided with a belt groove (621) and an annular groove (622) in sequence from top to bottom; the rotating drum (62) is sleeved with the transmission belt (65) through the belt groove (621); and the annular groove (622) of the rotating drum (62) is rotatably connected to the mounting frame (61) through a bearing (623); When the rotating drum (62) rotates to the top end or the bottom end of the external thread section (51), it can rotate synchronously with the main connecting shaft (5).

7. The coal chemical pressurized gasifier according to claim 2, characterized in that: The lower baffle assembly (4) includes a lower hopper (41) fixedly connected to the bottom end of the main connecting shaft (5), and a hopper surface cleaning assembly (42) for cleaning the outside of the lower hopper (41) is provided on the upper portion of the lower hopper (41). A vertically distributed limiting rod (43) is fixedly connected to the interior of the furnace body (1), and the limiting rod (43) is used to limit the hopper surface cleaning assembly (42) at any height.

8. The coal chemical pressurized gasifier according to claim 7, characterized in that: The lower hopper (41) is conical in shape, the top center position of the lower hopper (41) is fixedly connected to the bottom end of the main connecting shaft (5), and the bottom diameter of the lower hopper (41) is larger than the output port diameter of the feed pipe (2).

9. The coal chemical pressurized gasifier according to claim 7, characterized in that: The bucket surface cleaning assembly (42) includes a positioning column (421) fixedly connected to the center position of the bottom end of the lower hopper (41); an adapter ring (422) is rotatably connected to the outer side of the positioning column (421); a strip blade (423) is provided on the adapter ring (422) and fits on the outer conical surface of the lower hopper (41); a lower sleeve (424) is provided at the top end of the strip blade (423) for movably sleeved on the lower ring groove (53); the adapter ring (422) is fixedly connected to the limit rod (43); and a limit sleeve rod (425) is provided on the adapter ring (422) and movably sleeved on the limit rod (43).

10. A coal chemical pressurized gasifier according to claim 9, characterized in that: The strip-shaped blade (423) is parallel to the outer conical surface of the lower hopper (41), and both side surfaces of the strip-shaped blade (423) are in contact with the outer conical surface of the lower hopper (41).

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