Coal pyrolysis rotary kiln

Abstract

The present invention provides a coal pyrolysis rotary kiln, which relates to the field of pyrolysis technology. It includes a rotary kiln body, a spiral feed shaft is provided at the feed end of the rotary kiln body, a first shell is provided on the periphery of the feed section of the spiral feed shaft, a second shell is provided on the periphery of the first shell, a chamber formed between the first shell and the second shell is a steam outlet channel, an air inlet end of the steam outlet channel is connected to the inner cavity of the coal pyrolysis rotary kiln, and a steam outlet of the steam outlet channel is connected to the outside. The device provided by the present invention not only saves the energy originally needed to pyrolyze the free water of the raw coal in the high-temperature section, but also greatly reduces the total gas volume discharged from the coal gas outlet (because the free water is converted into steam and discharged from the steam outlet in advance), reduces the amount of coal gas purification and separation, reduces the size of the coal gas purification and separation equipment, and is conducive to reducing operating costs.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis, and in particular to a coal pyrolysis rotary kiln. Background Art

[0002] At present, there are a variety of horizontal rotary pyrolysis technologies, which have the problems of high yield of mixed coal gas and high operating cost of purifying and separating the coal gas.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a coal pyrolysis rotary kiln to solve the above technical problems.

[0005] The inventors have found that all gases produced during the pyrolysis process, including coal gas and water vapor, are discharged from a coal gas outlet, which causes the steam and coal gas produced by the free water contained in the raw coal to pass through the high-temperature zone of pyrolysis, causing the free water to absorb more energy and waste more energy. This is the main reason for the high yield of mixed coal gas and the operating cost of purifying and separating coal gas. Although some coal has been dried before entering the rotary kiln for pyrolysis, there is still external water. When the external water is heated, as the temperature increases, the heat absorbed will inevitably increase. The temperature of the pyrolysis rotary kiln gradually increases from the feed end to the discharge end. In order to prevent the external water of the coal from passing through the pyrolysis section as much as possible before pyrolysis, the technical solution of the present invention is specially proposed.

[0006] The present invention is achieved in that:

[0007] The present invention provides a coal pyrolysis rotary kiln, which comprises a rotary kiln body, a spiral feeding device is arranged at the feeding end of the rotary kiln body, a spiral feeding shaft is arranged at the spiral feeding device, a first shell is arranged at the periphery of the feeding section of the spiral feeding shaft, a second shell is arranged at the periphery of the first shell, a chamber formed between the first shell and the second shell is a steam outlet channel, an air inlet end of the steam outlet channel is communicated with the inner cavity of the rotary kiln, a steam outlet of the steam outlet channel is communicated with the outside, a water pipe is arranged in the steam outlet channel, a water outlet of the water pipe is arranged close to the air inlet end, and a water inlet of the water pipe is arranged outside the second shell;

[0008] The length of the first shell extending into the rotary kiln is greater than the length of the second shell extending into the rotary kiln. This arrangement is conducive to the material input into the kiln by the spiral feed shaft not easily entering between the first shell and the second shell, that is, the material is not easy to enter the steam outlet channel.

[0009] The inventor sets a steam outlet channel at the feed end of the coal pyrolysis rotary kiln, so that a part of the free water contained in the coal pyrolysis rotary kiln body is converted into steam in the low-temperature section of the rotary kiln body and discharged from the steam outlet. At the same time, as needed, the water sprayed from the water pipe is used to reduce dust and descale the dust carried by the steam to prevent the steam outlet channel from being blocked. The device can also prevent the coal gas in the rotary kiln from being discharged from the steam outlet by the size of the pipeline exhaust. This not only saves the energy originally needed to pyrolyze the free water of the raw coal in the high-temperature section, but also greatly reduces the total amount of gas discharged from the coal gas outlet (because the free water is converted into steam and discharged from the steam outlet in advance), reduces the amount of coal gas purification and separation, and reduces the size of the coal gas purification and separation equipment, which is conducive to reducing operating costs.

[0010] It should be noted that the feeding section of the spiral feed shaft is the low-temperature feeding section of the rotary kiln. The rotary kiln includes but is not limited to a horizontal rotary kiln.

[0011] The water outlet of the water pipe is close to the air inlet end of the steam outlet channel. As long as it can flush the dust and dirt carried by the steam, the specific spacing can be set according to actual needs, for example, 50-500mm from the air inlet end of the steam outlet channel.

[0012] In a preferred embodiment of the present invention, the water outlet of the water pipe is provided with a water flow distributor; the water flow distributor is provided with a plurality of water distribution holes, and the openings of the plurality of water distribution holes face the steam outlet of the steam outlet channel.

[0013] By arranging a water flow distributor to better flush dirt in the steam outlet channel to the steam outlet, it is helpful to prevent the steam pipeline from being blocked.

[0014] It should be noted that the water flow distributor is not limited to the semi-circular water pipe described below, and may be, for example, a shower head or a shower pipe.

[0015] The shape of the water distribution hole can be a circular hole, a square hole, an oblique hole, a triangular hole, an irregular quadrilateral hole, etc. The diameter of the water distribution hole can be 2-10 mm.

[0016] Preferably, the water flow distributor is a semicircular water pipe, and a plurality of water distribution holes are arranged at the position of the semicircular water pipe near the air inlet end of the steam outlet channel. In one embodiment, both ends of the semicircular water pipe are closed.

[0017] In a preferred embodiment of the present invention, a lubricating oil pipe is further provided in the steam outlet channel, one end of the lubricating oil pipe (i.e., serving as an oil inlet) extends along the cavity between the second shell and the first shell to the outside of the second shell, and the other end of the lubricating oil pipe (i.e., serving as an oil outlet) is connected to a spiral sleeve of the spiral feed shaft along the cavity between the second shell and the first shell. The lubricating oil pipe is provided to pass lubricating oil to lubricate the relative rotation between the spiral shaft and the sleeve, thereby extending the service life of the feed spiral sleeve.

[0018] In a preferred embodiment of the present invention, the rotary kiln body further comprises a rotary kiln feed end face, the second shell of the spiral feed shaft penetrates the rotary kiln feed end face, and a flexible sealing device is provided between the second shell of the spiral feed shaft and the rotary kiln feed end face.

[0019] The flexible sealing device includes a sealing ring, a vertical ring, a sealing collar, a flexible sealing ring, a shift fork and a shift rod located between the shift forks. The sealing collar is sleeved on the outer circumference of the sealing ring and rotates relative to the sealing ring for sealing. There is a gap between the sealing ring and the second housing. There are two vertical rings, which are arranged on both sides of the sealing ring, and the two ends of the vertical ring are fixedly connected to the second housing and the sealing ring respectively. There are two groups of shift forks, which are arranged on both sides of the flexible sealing ring. There are two groups of shift rods, which are correspondingly between the two groups of shift forks.

[0020] A second spiral device is arranged between the second shell and the end face of the rotary kiln feed end. The second spiral device includes a third shell and a spiral blade arranged in the third shell. There is a gap between the spiral blade and the outer peripheral wall of the second shell. The outer peripheral wall of the third shell has a contact surface away from the second shell. One end of the contact surface is fixedly connected to the end face of the rotary kiln feed end, and the other end of the contact surface is connected to the flexible sealing ring.

[0021] When the coal pyrolysis rotary kiln rotates, the third shell rotates with the coal pyrolysis rotary kiln, the fork and the lever rotate with the third shell, the sealing ring moves with the fork and the lever, and the sealing ring moves with the fork and the lever, and the sealing ring and the sealing ring form a relative rotation seal.

[0022] The jumping motions generated when the rotary kiln is running are flexibly absorbed by the flexible sealing ring, and the friction generated by the relative rotation is driven by the shift fork and the shift rod, so that the friction will not act on the flexible sealing ring, which is beneficial to greatly improve the service life of the flexible sealing ring. At the same time, the jumping operation of the rotary kiln and the relative rotation of the sealing ring and the second shell do not affect each other, so that the complex mutual rotation and jumping motion relationship between the rotary kiln and the feed screw becomes two simple mutual motions. In this embodiment, the movable end of the flexible sealing ring is close to the second shell, and the fixed end of the flexible sealing ring is located on the third shell.

[0023] In another embodiment, the fixed position and relative rotation position of the flexible sealing ring can be swapped, and the principle is the same as above. Specifically, when the vertical ring of the flexible sealing device is fixedly connected to the outer wall of the second shell, one end of the flexible sealing ring of the flexible sealing device is fixedly connected to the vertical ring, the other end of the flexible sealing ring is fixedly connected to the sealing ring, and the sealing ring is fixedly connected to the third shell; the fork located on one side of the sealing ring is fixedly connected to the flange of the sealing ring and the flexible sealing ring through a fixing member, and the fork on the other side is fixedly connected to the outer wall of the second shell, so that the sealing ring and the sealing ring are relatively rotated and sealed.

[0024] In a preferred embodiment of the present invention, the spiral blade rotates in a direction along with the normal operation of the rotary kiln, which has the effect of reducing the amount of fly ash entering the flexible sealing device and promoting the entry of fly ash into the kiln.

[0025] In the second embodiment, the movable end of the flexible sealing ring is close to the third shell, and the fixed end of the flexible sealing ring is located on the second shell. The sealing collar is in contact connection with the sealing ring (i.e., a rotating sealing connection), and one end of the sealing ring is fixedly connected to the outer wall of the third shell. The up and down and left and right bounces generated when the rotary kiln is running are flexibly absorbed by the flexible sealing ring, and the friction generated by the relative rotation is driven by the shift fork and the shift rod, so that the friction will not act on the flexible sealing ring, which is conducive to greatly improving the service life of the flexible sealing ring.

[0026] In one embodiment, the flexible sealing ring is a flexible rubber sealing ring.

[0027] Preferably, the number of the vertical ring is at least one.

[0028] In a preferred embodiment of the present invention, the screw feeding device further comprises a motor, a coupling, a support frame, a roller and a track, the power output end of the motor is connected to the coupling, the power output end of the coupling is connected to the screw feeding shaft, the support frame is arranged at the bottom of the motor and the second housing, the bottom of the support frame is provided with a roller, and the roller is cooperatively connected with the track. The roller and the track can be arranged to enable the feeding screw device to move forward and backward, which is convenient for equipment maintenance.

[0029] In a preferred embodiment of the present invention, a feed port is provided on the first shell, and the feed port passes through the second shell.

[0030] In a preferred embodiment of the present invention, the rotary kiln is provided with a waste flue gas collecting device, and the waste flue gas collecting device is connected to the tail of the flue gas heating pipe.

[0031] In a preferred embodiment of the present invention, the length of the first shell extending into the rotary kiln is at least 100 mm longer than the length of the second shell extending into the rotary kiln, for example, 150 mm, 200 mm, 500 mm, or 1000 mm.

[0032] Such an arrangement is advantageous in that the material input into the kiln by the spiral feeding shaft is not easy to enter between the first shell and the second shell, that is, the material is not easy to enter the steam outlet channel.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The coal pyrolysis rotary kiln provided by the present invention is provided with a steam outlet channel so that a part of the free water contained in the coal pyrolysis rotary kiln body is converted into steam in the low-temperature section of the rotary kiln body, and the steam is discharged from the steam outlet, thus realizing the removal of steam in the low-temperature section. At the same time, the dust carried by the steam is reduced and descaled by means of the water sprayed from the water pipe, thereby preventing the blockage of the dust in the steam outlet channel, thereby ensuring the continuous operation of the steam outlet channel. The device can also prevent the coal gas in the rotary kiln from being discharged from the steam outlet. This not only saves the energy originally needed to pyrolyze the free water of the raw coal in the high-temperature section, but also greatly reduces the total gas volume discharged from the coal gas outlet (because the free water is converted into steam and discharged from the steam outlet in advance), reduces the amount of coal gas purification and separation, reduces the size of the coal gas purification and separation equipment, and is conducive to reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of the coal pyrolysis rotary kiln provided in Example 1;

[0037] Figure 2 This is a schematic diagram of the structure of the coal pyrolysis rotary kiln provided in Example 2.

[0038] Icons: 1-horizontal rotary kiln body; 2-feed end face of rotary kiln; 3-feed screw device; 31-first shell; 32-screw feed shaft; 33-screw bushing; 34-reduction motor; 35-coupling; 36-support frame; 37-roller; 38-track; 39-feed port; 4-waste flue gas collection device; 41-waste flue gas outlet; 5-second shell; 51-steam outlet channel; 52-steam outlet; 53-water pipe; 54-semicircular water pipe; 55-water outlet hole; 56-lubricating oil pipe; 57-oil inlet; 61-heating pipe; 7-flexible sealing device; 71-sealing ring; 72-vertical ring; 73-sealing sleeve ring; 74-flexible rubber sealing ring; 75-shift fork; 76-shift rod; 8-screw device II; 81-third shell; 82-spiral blade. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Example 1

[0046] See also Figure 1 As shown, this embodiment provides a coal pyrolysis rotary kiln, which includes: a horizontal rotary kiln body 1. The horizontal rotary kiln body 1 includes: a rotary kiln feed end face 2, a feed screw device 3, a flue gas heating pipe (not all drawn), a waste flue gas collection device 4 and a waste flue gas outlet 41.

[0047] The feeding screw device 3 includes a screw feed shaft 32, and a first shell 31 is arranged on the periphery of the feeding section of the screw feed shaft 32. A second shell 5 coaxial with the first shell 31 is arranged on the periphery of the first shell 31, and the first shell 31 is fixedly connected to the second shell 5. In this embodiment, the length of the first shell extending into the rotary kiln is set to be 100 mm longer than the length of the second shell extending into the rotary kiln. Such a setting is conducive to the material fed into the kiln by the screw feed shaft not easily entering between the first shell 31 and the second shell 5, that is, the material is not easy to enter the steam outlet channel 51.

[0048] The chamber formed between the first shell 31 and the second shell 5 is a steam outlet channel 51, the air inlet end of the steam outlet channel 51 is connected to the inner cavity of the first shell 31, and the steam outlet 52 of the steam outlet channel 51 is connected to the outside. In addition, a water pipe 53 is also arranged in the steam outlet channel 51, the water outlet of the water pipe 53 is arranged close to the air inlet end, and the water inlet of the water pipe 53 is arranged outside the second shell 5. In this embodiment, the water pipe 53 is arranged in the steam outlet channel 51, and the pipeline direction of the water pipe 53 in the steam outlet channel 51 is arranged along the inner peripheral wall of the second shell 5. The water outlet is arranged corresponding to the air inlet end.

[0049] In this embodiment, the other end of the water pipe 53 is connected to the semi-circular water pipe 54 at a position close to the second shell 5. Both ends of the semi-circular water pipe 54 are closed. The semi-circular water pipe 54 is provided with a plurality of water outlet holes 55 (i.e., water distribution holes) toward the steam outlet. The water coming out of the water outlet holes 55 flushes the dirt in the steam outlet channel 51 to the steam outlet 52, which helps to prevent the steam pipe from being blocked.

[0050] In this embodiment, the water outlet hole 55 is circular with a diameter of 5 mm. In other embodiments, the shape of the water outlet hole can be a square hole, an oblique hole, a triangular hole, an irregular quadrilateral hole, etc. The diameter of the water outlet hole can be 2-10 mm.

[0051] Specifically, in this embodiment, refer to Figure 1 As shown, the steam outlet 52 is arranged below the second shell 5 and away from the feed end surface 2 of the rotary kiln, and one end surface of the second shell 5 passes through the feed end surface 2 of the rotary kiln.

[0052] A spiral device 8 is arranged between the second shell 5 and the feed end face 2 of the rotary kiln. The spiral device 8 comprises a third shell 81 and a spiral blade 82. The third shell 81 penetrates the feed end face 2 of the rotary kiln and is fixedly connected to the feed end face 2 of the rotary kiln. The spiral blade 82 is fixedly connected to the inner surface of the third shell 81. A gap is left between the spiral blade 82 and the outer surface of the second shell 5. The rotation direction of the spiral blade 82 changes with the normal operation of the rotary kiln, which has the function of preventing fly ash from entering.

[0053] Specifically, a gap is left between the spiral blade 82 and the outer peripheral wall of the second shell 5, and the outer peripheral wall of the third shell 81 has a contact surface away from the second shell 5, one end of the contact surface is fixedly connected to the end face 2 of the rotary kiln feed end, and the other end of the second contact surface is fixedly connected to the flexible rubber sealing ring 74.

[0054] A flexible sealing device 7 is provided between the outer periphery of the second housing 5 and the third housing 81. In this embodiment, the flexible sealing device 7 is fixedly connected to the third housing 81, and a relatively rotating seal is provided between the flexible sealing device 7 and the second housing 5.

[0055] In a specific embodiment, the horizontal rotary kiln body 1 further includes a discharge port (not shown), a gas outlet (not shown), a kiln body rotation support device (not shown), and a kiln body rotation power transmission device (not shown).

[0056] Furthermore, the feeding screw device 3 includes a screw feeding shaft 32 and a screw sleeve 33 .

[0057] The feeding screw device 3 also includes a reduction motor 34, a coupling 35, a support frame 36, a roller 37, a track 38 and a feed port 39. The power output end of the reduction motor 34 is connected to the coupling 35, and the power output end of the coupling 35 is connected to the screw feed shaft 32. The upper end of the support frame 36 supports the reduction motor 34 and the second housing 5. The lower end of the support frame 36 is provided with a roller 37, which is arranged on the track 38 and is connected to the track 38. The provision of the roller and the track allows the feeding screw device to move forward and backward, providing convenience for equipment maintenance.

[0058] In this embodiment, the feed port 39 is arranged above the first shell 31 away from the feed end face 2 of the rotary kiln, and passes through the second shell 5, and a steam outlet 52 is arranged below the second shell 5 at a position corresponding to the feed port 39. In other embodiments, the positions of the feed port 39 and the steam outlet 52 can be adaptively adjusted as needed, and are not limited to the above positions.

[0059] A lubricating oil pipe 56 is also provided in the steam outlet channel 51, one end of the lubricating oil pipe 56 (i.e., serving as an oil inlet 57) extends to the outside of the second housing 5, and the other end of the lubricating oil is connected to a spiral sleeve 33 provided outside the spiral feed shaft 32. The lubricating oil pipe 56 is provided to pass lubricating oil to lubricate the relative rotation between the spiral feed shaft 32 and the spiral sleeve 33, thereby extending the service life of the feed spiral sleeve 33.

[0060] A flexible sealing device 7 is arranged between the second shell 5 and the third shell 81, wherein a sealing ring 71 is arranged on the outer periphery of the second shell 5 away from the end face 2 of the rotary kiln feed end, two vertical rings 72 are arranged between the two ends of the sealing ring 71 and the outer surface of the second shell 5, and a fixed seal is formed between the sealing ring 71, the vertical rings 72 and the second shell 5. The flexible sealing device 7 also includes a sealing sleeve ring 73 and a flexible rubber sealing ring 74, one end of the flexible rubber sealing ring 74 is fixedly connected to the third shell 81, and the other end is fixedly connected to the sealing sleeve ring 73 through a flange, and the sealing sleeve ring 73 is sleeved on the outer periphery of the sealing ring 71, and a relative rotation seal is formed between the sealing ring 71 and the sealing ring 71.

[0061] The flexible sealing device 7 also includes: a shift fork 75 arranged on both sides of the flexible rubber sealing ring 74, and a shift rod 76 arranged between the shift forks 75 on both sides. This arrangement enables the sealing ring on the second shell to be connected to the sealing ring in a relatively rotating and sealed manner. The jumping generated up and down, left and right when the rotary kiln is running is flexibly absorbed by the flexible sealing ring. The friction generated by the relative rotation is driven by the shift fork and the shift rod, so that the friction will not act on the flexible sealing ring, which is beneficial to greatly improve the service life of the flexible sealing ring. At the same time, the jumping operation of the rotary kiln and the relative rotation of the sealing ring and the second shell do not affect each other, so that the complex mutual rotation and jumping motion relationship between the rotary kiln and the feed screw becomes two simple mutual motions. In this embodiment, the movable end of the flexible sealing ring is close to the second shell, and the fixed end of the flexible sealing ring is located on the third shell.

[0062] The flue gas heating pipe 61 penetrates the feed end face 2 of the rotary kiln, the waste flue gas collecting device 4 is connected with the heating pipe 61 and is connected with the waste flue gas outlet 41, and the waste flue gas collecting device 4 and the horizontal rotary kiln body 1 are relatively rotationally sealed.

[0063] Example 2

[0064] Reference Figure 2As shown, the difference from Example 1 is that in this embodiment, the fixed position and the relative rotation position of the flexible rubber sealing ring 74 are swapped, and the principle is the same as in Example 1. In this embodiment, the movable end of the flexible rubber sealing ring 74 is close to the third shell 81, and the fixed end of the flexible rubber sealing ring 74 is located at the vertical ring 72 on the second shell 5 (the number of vertical rings is one). The sealing ring 73 is in contact with the sealing ring 71 (that is, a rotating sealing connection), and one end of the sealing ring 71 is fixedly connected to the outer wall of the third shell 81. The jumping generated up and down and left and right when the rotary kiln is running is flexibly absorbed by the flexible rubber sealing ring 74, and the friction generated by the relative rotation is driven by the fork 75 and the lever 76, so that the friction will not act on the flexible rubber sealing ring 74, which is beneficial to greatly improve the service life of the flexible rubber sealing ring 74.

[0065] When the vertical ring 72 of the flexible sealing device is fixedly connected to the outer wall of the second shell 5, one end of the flexible rubber sealing ring 74 of the flexible sealing device is fixedly connected to the vertical ring 72, the other end of the flexible rubber sealing ring 74 is fixedly connected to the sealing sleeve ring 73, and the sealing ring 71 is fixedly connected to the third shell 81; the fork 75 located on one side of the sealing sleeve ring 73 is fixedly connected to the flange of the sealing sleeve ring 73 and the flexible rubber sealing ring 74 through a fixing part, and the fork 75 on the other side is fixedly connected to the vertical ring 72 on the second shell 5.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coal pyrolysis rotary kiln, It is characterized in that It comprises a rotary kiln body, a screw feeding device is arranged at the feeding end of the rotary kiln body, the screw feeding device is provided with a screw feeding shaft, a first shell is arranged at the periphery of the feeding section of the screw feeding shaft, a second shell is arranged at the periphery of the first shell, a chamber formed between the first shell and the second shell is a steam outlet channel, an air inlet end of the steam outlet channel is communicated with the inner cavity of the coal pyrolysis rotary kiln, a steam outlet of the steam outlet channel is communicated with the outside, a water pipe is arranged in the steam outlet channel, a water outlet of the water pipe is arranged close to the air inlet end, and a water inlet of the water pipe is arranged outside the second shell; The length of the first shell extending into the rotary kiln is greater than the length of the second shell extending into the rotary kiln; The rotary kiln body also includes a rotary kiln feed end face, the second shell of the spiral feed shaft penetrates the rotary kiln feed end face, and a flexible sealing device is provided between the second shell of the spiral feed shaft and the rotary kiln feed end face; The water outlet of the water pipe is provided with a water flow distributor; the water flow distributor is provided with a plurality of water distribution holes.

2. The coal pyrolysis rotary kiln according to claim 1, It is characterized in that The water flow distributor is a semicircular water pipe, and a plurality of water distribution holes are arranged at a position of the semicircular water pipe close to the air inlet end of the steam outlet channel, and the openings of the plurality of water distribution holes face the steam outlet of the steam outlet channel.

3. The coal pyrolysis rotary kiln according to claim 1, It is characterized in that A lubricating oil pipe is also provided in the steam outlet channel, one end of the lubricating oil pipe extends along the cavity between the second shell and the first shell to the outside of the second shell, and the other end of the lubricating oil extends along the cavity between the second shell and the first shell and is connected to the spiral sleeve of the spiral feed shaft.

4. The coal pyrolysis rotary kiln according to claim 1, It is characterized in that The flexible sealing device comprises a sealing ring, a vertical ring, a sealing collar, a flexible sealing ring, a shift fork and a shift rod located between the shift forks. The sealing collar is sleeved on the outer circumference of the sealing ring and is relatively rotatably sealed with the sealing ring. There is a gap between the sealing ring and the second housing. There are two vertical rings, which are arranged on both sides of the sealing ring, and the two ends of the vertical ring are respectively fixedly connected to the second housing and the sealing ring. There are two groups of shift forks, which are arranged on both sides of the flexible sealing ring. There are two groups of shift rods, which are correspondingly between the two groups of shift forks. A second spiral device is arranged between the second shell and the end face of the rotary kiln feed end, and the second spiral device includes a third shell and a spiral blade arranged in the third shell, and a gap is formed between the spiral blade and the outer peripheral wall of the second shell, and the outer peripheral wall of the third shell has a contact surface away from the second shell, one end of the contact surface is fixedly connected to the end face of the rotary kiln feed end, and the other end of the contact surface is connected to the flexible sealing ring.

5. The coal pyrolysis rotary kiln according to claim 4, It is characterized in that The screw feeding device also includes a motor, a coupling, a support frame, a roller and a track. The power output end of the motor is connected to the coupling, and the power output end of the coupling is connected to the screw feed shaft. The support frame is arranged at the bottom of the motor and the second shell. The bottom of the support frame is provided with a roller, and the roller is cooperatively connected with the track.

6. The coal pyrolysis rotary kiln according to claim 1, It is characterized in that A feed inlet is provided on the first shell, and the feed inlet passes through the second shell.

7. The coal pyrolysis rotary kiln according to claim 4, It is characterized in that A waste flue gas collecting device is arranged outside the end surface of the rotary kiln feeding end, and the waste flue gas collecting device is connected with the tail end of the flue gas heating pipe.

8. The coal pyrolysis rotary kiln according to claim 1, It is characterized in that The length of the first shell extending into the rotary kiln is at least 100 mm longer than the length of the second shell extending into the rotary kiln.

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