Sealing device and rotary reactor comprising same

Abstract

The invention discloses a sealing device and a rotary reactor comprising the same, the reactor comprises a cylinder capable of rotating and a cover head, the sealing device comprises a rotating disc and a sealing assembly, the rotating disc sleeves and is connected to the outer side of the cylinder, and the sealing assembly comprises a sealing part, a sealing piece and a pressing part; the sealing part comprises a first sealing part and a second sealing part on the two sides of the rotating disc, communicated sealing cavities are formed between the sealing part and the rotating disc, and the sealing cavities on the two sides of the rotating disc are communicated with external sealing media respectively; the pressing part enables the sealing piece in the sealing cavity to elastically abut against the rotating disc so as to limit gas leakage. According to the sealing device and the rotary reactor comprising the sealing device, sealing short circuit is avoided at the sealing cavity parts on the two sides of the rotating disc, the sealing reliability and stability are improved, active and continuous pressing force can be generated according to jumping and movement generated by the rotating disc, the sealing stability and the sealing effect are improved, and the sealing device and the rotary reactor are convenient to install and maintain.

Description

Technical Field

[0001] The invention relates to the field of solid waste resource processing, and in particular to a sealing device and a rotary reactor comprising the same. Background Art

[0002] Thermochemical conversion technologies represented by pyrolysis and gasification are widely used in the field of resource utilization of solid waste due to their wide range of raw material applicability and high resource recovery rate. As a common industrial production equipment, the rotary kiln has become an ideal choice for pyrolysis equipment due to its strong adaptability to the size, state and type of raw materials, high reaction intensity and easy scalability. During the reaction, the material decomposes under high temperature and oxygen-controlled environment, producing a large amount of combustible gas, accompanied by the generation of harmful gases such as carbon monoxide, nitrogen oxides and sulfides. In view of the toxic and harmful nature of these products, the equipment must have a high degree of sealing performance to prevent leakage from causing environmental pollution or safety hazards.

[0003] However, due to the large size of the rotary kiln, radial runout or axial movement may occur during operation during the processing process and when it is deformed due to thermal expansion. Traditional sealing methods, such as fish scale seals, labyrinth seals or packing seals, are difficult to meet the high standard sealing requirements required for pyrolysis reactions. In addition, in the prior art, the rotary kiln has the following disadvantages in its sealing in such an application environment: the seal is not tight or there is a "seal short circuit" (seal short circuit means that the sealed gas is directly connected at a certain position in the middle of the sealing path or sealing surface, shortening the length of the sealing path or the seal is not tight), resulting in unreliable sealing effect and poor stability; it is impossible to continuously and reliably seal the gaps caused by the run-time ... Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of poor stability and reliability of the rotary reactor seal in the prior art and inconvenient installation and maintenance, and to provide a sealing device and a rotary reactor comprising the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A sealing device for a rotary reactor, the rotary reactor comprising a cylinder and a cover head, the cover head being arranged at the end of the cylinder, the cylinder being configured to rotate around a central axis, the cover head being fixedly arranged, the cylinder being in communication with the cover head, the sealing device comprising:

[0007] A rotating disk is sleeved and connected to the outside of the cylinder body, and the disk surface of the rotating disk extends along the radial direction of the cylinder body;

[0008] A sealing assembly, the sealing assembly includes a sealing part, at least one seal and at least one pressing part. The sealing part includes a first sealing part and a second sealing part provided on both sides of the rotating disk along the axial direction and spaced from the rotating disk respectively. A sealing cavity communicating with the outside end of the rotating disk along the radial direction is formed between the first sealing part and the second sealing part and the rotating disk. An external sealing medium is communicated in the sealing cavity. The seal is arranged in the sealing cavity. The pressing part extends into the sealing cavity from the outside of the sealing part and elastically abuts the seal against the disk surface of the rotating disk to limit the leakage of gas in the cylinder body to the outside.

[0009] In this solution, through the above settings, the axial sealing path between the cylinder body and the cover head is radially extended to a zigzag sealing path surrounding both sides of the rotating disk, extending the sealing path and improving the sealing effect. Since the sealing cavities on both sides of the rotating disk are blocked by its disk surface and not communicated, "sealing short circuit" is avoided, and they are independent of each other and do not interfere with each other; in the case where the rotary cylinder body generates radial runout and axial movement, as well as high temperature inside the cylinder, such a sealing structure improves the reliability and stability of the sealing. By elastically abutting the seal against the disk surface of the rotating disk through the pressing part, a "brake pad" type tight sealing structure is formed, which can generate an active and continuous pressing force according to the runout and movement generated by the rotating disk, improving the stability of the overall seal of the rotary reactor. Moreover, the pressing part and the seal can be disassembled and replaced from both sides of the rotating disk, which is convenient for installation and maintenance.

[0010] Preferably, at least one groove is respectively provided on the surfaces of the first sealing part and the second sealing part facing the rotating disk. The seal is arranged in the groove, and the pressing part elastically abuts against the seal and fits the seal on the disk surface of the rotating disk.

[0011] In this solution, through the cooperation between the seal and the groove, the tortuosity and length of the sealing path are further improved, and the sealing effect is further improved.

[0012] Preferably, the first sealing part is fixedly connected to the end of the cover head. The sealing device further includes a supporting part. The supporting part includes a stationary part and a moving part that can move relative to each other. The stationary part is fixedly connected to the second sealing part, and the rotating disk is connected to the outside of the cylinder body through the moving part;

[0013] Preferably, the stationary part and the moving part are connected by rolling;

[0014] Preferably, the sealing device further includes a heat insulation ring, and the moving part is fixedly connected to the cylinder body through the heat insulation ring.

[0015] In this solution, through the stationary part and the moving part arranged above, the dynamic and static movements between the moving components (the rotating disc and the moving part rotate with the cylinder body) and the stationary components (the stationary part, the sealing assembly and the fixedly arranged cover form the stationary components) are independently realized, and the support of the sealing assembly on the cylinder body is provided, ensuring that the sealing assembly and the rotating cylinder body keep synchronous jumping and coking, realizing that the sealing assembly and the rotating cylinder body keep relative static, only with rotational movement, effectively solving the problem of sealing surface short circuit caused by the jumping and coking of the sealing surface in the traditional sealing process of the rotary body, resulting in poor sealing, and greatly improving the overall sealing performance of the rotary reactor. Among them, the first sealing part is fixedly connected to the end of the cover, and the stationary part is fixedly connected to the second sealing part, that is, the stationary part and the moving part that are vulnerable due to relative movement are arranged outside the rotating disc, isolated from the toxic and harmful gases in the cylinder body, and avoided being corroded, thus being beneficial to the structural stability and sealing reliability. The rolling connection is adopted between the stationary part and the moving part, with small frictional resistance and not easy to cause jumping and coking, which is beneficial to the sealing stability and reliability. Through the heat insulation ring arranged above, the high-temperature gas of the cylinder body can be blocked from conducting heat to the sealing device, affecting the sealing effect.

[0016] Preferably, at least one protrusion is arranged on at least one side of the rotating disc along the axial direction, the groove is arranged on both sides of the protrusion along the radial direction, and the relative end faces along the axial direction between the first sealing part and / or the second sealing part and the protrusion are arranged at intervals;

[0017] And / or, at least one concave structure is arranged on at least one side of the rotating disc along the axial direction, and part of the seal is clamped in the concave structure.

[0018] In this solution, through the protrusion and / or the concave structure arranged above, the tortuosity degree of the sealing path is further improved; the axial sealing surface and the radial sealing surface are formed around the protrusion and / or the concave structure, increasing the contact area between the seal and / or the sealing medium on the sealing path, thereby improving the sealing effect. Among them, the relative end faces along the axial direction between the first sealing part and / or the second sealing part and the protrusion are arranged at intervals, so that the sealing medium can flow and fill the sealing cavities on both sides of the protrusion along the radial direction.

[0019] Preferably, at least one of the protrusions is arranged on both sides of the rotating disc along the axial direction,

[0020] The first sealing part and the second sealing part are provided with a sealing medium communication port for communicating with the external sealing medium at the protrusion; and / or the protrusions on both sides of the rotating disc along the axial direction are arranged oppositely.

[0021] In this solution, through the above - provided sealed medium communication port, the arrangement of the seal and the groove is staggered to optimize the structural layout. The protrusions on both sides of the rotating disk along the axial direction are arranged oppositely, simplifying the structure of the rotating disk and making it easy to process.

[0022] Preferably, the pressing part includes an elastic body and a pressing member. The pressing members located on both sides of the rotating disk along the axial direction respectively extend into the groove along the axial direction from the outside of the first sealing part and the second sealing part and are connected to the elastic body, and the elastic body abuts against the seal.

[0023] In this solution, through the above - provided elastic body and pressing member, elastic abutment against the seal is achieved.

[0024] Preferably, the pressing members located on both sides of the rotating disk along the axial direction are respectively movably connected to the first sealing part and the second sealing part.

[0025] In this solution, the pressing members are respectively movably connected to the first sealing part and the second sealing part, enabling the pressing members to adjust the force for pressing the elastic body in the axial direction, so that the seal can fit more closely to the rotating disk.

[0026] Preferably, the seal is a flexible seal; and / or, a flexible connection is adopted between the first sealing part and the end of the cover head.

[0027] In this solution, using a flexible seal for the seal is another form for the pressing part to achieve elastic abutment against the seal. Adopting a flexible connection between the first sealing part and the end of the cover head can reduce the influence of axial movement on the seal.

[0028] Preferably, the stationary part is provided with a cooling channel, and the cooling channel is connected to an external cooling medium.

[0029] In this solution, by providing a cooling channel in the stationary part, the heat generated by the friction between the stationary part and the moving part and the friction of the seal on the rotating disk can be absorbed, which is beneficial to the stability of the sealing effect. Through the selection of the cooling medium and the regulation of the flow rate, the operating temperature of the rotating support part and the sealing assembly can be safely controlled, realizing stable operation under high - temperature working conditions.

[0030] A rotary reactor, the rotary reactor includes a cylinder body, a cover head and the sealing device as described above.

[0031] In this solution, the rotary reactor increases the tortuosity and length of the sealing path by adopting the above-mentioned sealing device, thereby improving the sealing effect; the sealing cavity parts on both sides of the rotating disc are independent of each other and do not interfere with each other, thus avoiding "sealing short circuit" and improving the reliability and stability of the seal. The pressing part elastically abuts against the seal, and the seal is attached to the disc surface of the rotating disc, forming a "brake pad" type tight sealing structure, which can generate active and continuous pressing force according to the jumping and swaying of the rotating disc, thereby improving the stability of the overall sealing of the rotary reactor. In addition, the pressing part and the seal can be disassembled and replaced from both sides of the rotating disc, which is convenient for installation and maintenance.

[0032] The positive and progressive effects of the present invention are: the sealing device and the rotary reactor including the same increase the tortuosity and length of the sealing path, thereby improving the sealing effect; the sealing cavity parts on both sides of the rotating disc are independent of each other and do not interfere with each other, thus avoiding "sealing short circuit" and improving the reliability and stability of the seal. The pressing part elastically abuts against the seal, and the seal is attached to the disc surface of the rotating disc, forming a "brake pad" type tight sealing structure, which can generate active and continuous pressing force according to the jumping and swaying of the rotating disc, thereby improving the stability of the overall sealing of the rotary reactor. In addition, the pressing part and the seal can be disassembled and replaced from both sides of the rotating disc, which is convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of the rotary reactor of Example 1 of the present invention.

[0034] Figure 2 This is a schematic structural diagram of the second sealing portion of Example 1 of the present invention.

[0035] Figure 3 It is an enlarged schematic diagram of the sealing device assembly structure of Example 1 of the present invention.

[0036] Figure 4 This is a schematic diagram of the cross-sectional structure of the rotating disk of Example 1 of the present invention.

[0037] Figure 5 It is a front view of the rotating disk of Example 1 of the present invention.

[0038] Description of reference numerals:

[0039] Cylinder 1

[0040] Hood 2

[0041] Sealing device 3

[0042] Rotate the disc 4

[0043] Protrusion 41

[0044] Axial sealing surface 411

[0045] Radial sealing surface 412

[0046] Sealing assembly 5

[0047] Sealing part 51

[0048] First sealing part 511

[0049] Second sealing part 512

[0050] Groove 513

[0051] Sealing medium inlets 514, 516

[0052] Sealing medium outlets 515, 517

[0053] Connecting bolt 518

[0054] Sealing element 52

[0055] Pressing part 53

[0056] Elastomer 531

[0057] Pressing piece 532

[0058] Support part 54

[0059] Stationary part 541

[0060] Cooling channel 5411

[0061] Cooling medium inlet 5412

[0062] Cooling medium outlet 5413

[0063] Ball 542

[0064] Moving part 543

[0065] Flexible connection 6

[0066] Heat insulation ring 7

[0067] Radial direction A of the cylinder

[0068] Axial direction B of the cylinder Specific implementation mode

[0069] The present invention will be further described below by way of examples, but the present invention is not limited to the scope of the described examples.

[0070] Example 1

[0071] This embodiment provides a sealing device 3 for a rotary reactor, which is a solid waste resource treatment device such as a rotary kiln or a rotary furnace for pyrolysis and gasification.

[0072] As Figure 1 shown, the rotary reactor includes a cylinder 1 and a hood 2. The cylinder 1 is a cylindrical rotary container configured to rotate about a central axis. During operation, the cylinder 1 is heated to a high temperature, and the solid waste to be treated is sent into the inner cavity of the cylinder 1, where it decomposes in a high-temperature and oxygen-controlled environment, generating a large amount of combustible gas and accompanied by the generation of harmful gases such as carbon monoxide, nitrogen oxides, and sulfides. The hood 2 is a circular end cap covering the end of the cylinder 1, and the hood 2 is fixedly arranged through an external bracket or the like. The cylinder 1 is in communication with the hood 2, that is, the gas decomposed in the cylinder 1 can flow in the cylinder 1, the concave inner cavity of the hood 2, and the gap between the cylinder 1 and the hood 2.

[0073] As Figure 1-3 shown, the sealing device 3 includes a rotating disk 4 and a sealing assembly 5.

[0074] Among them, the rotating disk 4 is an annular disk body with a large through hole at the center of the arc. The rotating disk 4 is sleeved and connected to the outside of the cylinder 1, and the disk surface of the rotating disk 4 extends along the radial direction A of the cylinder 1.

[0075] The sealing assembly 5 includes a sealing part 51, at least one sealing member 52, and at least one pressing part 53. The sealing part 51 includes a first sealing part 511 and a second sealing part 512. The first sealing part 511 and the second sealing part 512 are specifically two substantially semi-connected ring structures, which are respectively arranged on both sides of the rotating disk 4 along the axial direction B and are spaced from the rotating disk 4. The first sealing part 511 and the second sealing part 512 are each provided with a plurality of through holes along the circumferential direction at their outer edges, and each pair of through holes at the same position is connected by a long bolt, so as to connect the left and right halves of the first sealing part 511 and the second sealing part 512 into a whole. Since the two sealing parts are axially spaced from the rotating disk 4 and there is also a space at the top of the radial direction A of the rotating disk 4, a sealing cavity communicating with the outer end of the rotating disk 4 along the radial direction A is formed between the first sealing part 511 and the second sealing part 512 and the rotating disk 4; from Figure 3From the perspective of [description], a U-shaped sealing mechanism is formed between the two sealing parts and the rotating disc 4. The sealing cavities on the left and right sides are separated by the rotating disc 4, forming two relatively independent sealing cavities, which are only connected at the top of the rotating disc 4 along the radial direction A. The first sealing part 511 and the second sealing part 512 are each provided with through holes along the axial direction B, so that the sealing cavities on the left and right sides are respectively connected to external sealing media, and the sealing media on the left and right sides can be the same sealing medium or different sealing media. The seal 52 is arranged in the sealing cavity, and the pressing part 53 extends into the sealing cavity from the outside of the sealing part 51 and elastically abuts the seal 52 against the disc surface of the rotating disc 4 to prevent the gas in the cylinder body 1 from leaking outwards.

[0076] With the above settings, the axial sealing path between the cylinder body 1 and the cover head 2 of the sealing device 3 is radially extended to a tortuous sealing path around both sides of the rotating disc 4, extending the sealing path and improving the sealing effect. Since the sealing cavities on both sides of the rotating disc 4 are blocked and not connected by its disc surface, "sealing short circuit" is avoided, and they are independent of each other and do not interfere with each other; in the case where the rotary cylinder body 1 will generate radial runout and axial movement, as well as high temperature inside the cylinder, such a sealing structure improves the reliability and stability of the sealing. By elastically abutting the seal 52 against the disc surface of the rotating disc 4 through the pressing part 53, a "brake pad" type tight sealing structure is formed, which can generate an active and continuous pressing force according to the runout and movement of the rotating disc 4, improving the stability of the overall seal of the rotary reactor. Moreover, the pressing part 53 and the seal 52 can be disassembled and replaced from both sides of the rotating disc 4, which is convenient for installation and maintenance.

[0077] Here, it should be noted that the structure and shape of the sealing part 51 can have various forms, not limited to the structure form of this embodiment. Its two sealing parts (i.e., the first sealing part 511 and the second sealing part 512) can also be an integral sealing component inserted into the two extended parts on both sides of the rotating disc 4, just like two feet. The extended parts on both sides and the body of the sealing part 51 are still an integral component that is not separated, rather than being limited to being formed by two half-sealing parts connected in series by bolts as in this embodiment. In this embodiment, in order to make the first sealing part 511 and the second sealing part 512 on both sides have a better sealing effect when connected, sealing materials such as sealing rubber strips can be clamped between the two sealing parts at their connection near the top to prevent the externally introduced liquid or gaseous sealing medium from leaking between the two half-sealing parts. The sealing medium (such as sealing medium 1) introduced into the left sealing cavity and the sealing medium (such as sealing medium 2) introduced into the right sealing cavity can be the same substance or different substances. The preferred sealing media are nitrogen, lubricating oil, steam and other media.

[0078] Among them, at least one groove 513 is respectively provided on the surfaces of the first sealing portion 511 and the second sealing portion 512 facing the rotating disc 4. The seal 52 is arranged in the groove 513, and the pressing portion 53 elastically abuts against the seal 52 to fit the seal 52 on the disc surface of the rotating disc 4, so as to limit the leakage of the gas in the cylinder body 1 to the outside. Specifically, as Figure 3 shown, in this embodiment, two grooves 513 are respectively provided on the left and right sides of the rotating disc 4 for the first sealing portion 511 and the second sealing portion 512. Correspondingly, there are two pairs of seals 52 and pressing portions 53 on the left and right sides respectively; in this way, through the cooperation of the seal 52 and the groove 513, a zigzag n-shaped sealing path is formed between the entire sealing assembly 5 and the rotating disc 4, further increasing the tortuosity and length of the sealing path, and further improving the sealing effect. When the gas in the cylinder body 1 wants to leak from this sealing device 3, the gas needs to break through the liquid or gaseous sealing medium in this zigzag n-shaped sealing path before it can leak to the outside, which shows that this sealing device 3 greatly improves the sealing performance.

[0079] In other embodiments, the structural forms of the first sealing portion 511 and the second sealing portion 512 are various. The surfaces facing the rotating disc 4 may not have grooves, or grooves may be provided on the surface of the rotating disc 4, and are not limited to the groove 513 structure of this embodiment. The number of the grooves 513, the seals 52 on both sides of the rotating disc 4 and their corresponding pressing portions 53 can be adjusted accordingly as needed.

[0080] As Figure 3 shown, the first sealing portion 511 is fixedly connected to the end of the cover head 2 by bolts; this sealing device 3 further includes a support portion 54. The support portion 54 is an integral rotary support, including a stationary portion 541 and a moving portion 543 that can move relative to each other. The stationary portion 541 and the moving portion 543 are specifically the non-rotatable stationary portion 541 located on the outer ring and the rotatable moving portion 543 located on the inner ring of a rolling bearing. A plurality of balls 542 are sandwiched between the stationary portion 541 and the moving portion 543 of the inner and outer rings, so that the moving portion 543 of the inner ring can roll relative to the stationary portion 541 of the outer ring. The structure of the rolling bearing is a prior art, and its specific structure will not be elaborated here too much.

[0081] The stationary part 541 located on the outer ring is fixedly connected to the second sealing part 512. The moving part 543 located on the inner ring is connected to the outside of the cylinder body 1 through the heat insulation ring 7, and the moving part 543 also rotates following the rotary motion of the cylinder body 1. A plurality of spaced through holes are circumferentially formed along the inner side end of the rotating disc 4 close to the cylinder body 1, and a plurality of through holes are also circumferentially formed along the inner side end of the moving part 543. A long bolt penetrates through the through holes of the moving part 543, thereby connecting the rotating disc 4 to the moving part 543, and thus the rotating disc 4 is connected to the cylinder body 1 through the moving part 543. In such a structure, the rotating disc 4, the moving part 543 and the cylinder body 1 form a rotary moving part 543 component, while the stationary part 541, the entire sealing assembly 5 and the cover head 2 form a stationary stationary part 541 component.

[0082] Through the above - provided stationary part 541 and moving part 543, the sealing device 3 not only realizes the independent realization of the dynamic and static motions between the moving part 543 component (the rotating disc 4 and the moving part 543 rotate with the cylinder body 1) and the stationary part 541 component (the stationary part 541 and the sealing assembly 5 and the fixedly - arranged cover head 2 form the stationary part 541 component), but also provides support for the sealing assembly 5 on the cylinder body 1, ensuring that the sealing assembly 5 and the rotating cylinder body 1 maintain synchronous jumping and crosstalking, realizing that the sealing assembly 5 and the rotating cylinder body 1 remain relatively stationary, only with rotational motion, effectively solving the problem of sealing surface short - circuit caused by the jumping and crosstalking of the sealing surface in the traditional sealing process of a rotating body, which leads to poor sealing, and greatly improving the system sealing performance. Among them, the first sealing part 511 is fixedly connected to the end of the cover head 2, and the stationary part 541 is fixedly connected to the second sealing part 512, that is, the easily - worn stationary part 541 and moving part 543 due to relative motion are arranged outside the rotating disc 4, isolated from the toxic and harmful gases inside the cylinder body 1, and avoided from being corroded, thus being beneficial to the structural stability and sealing reliability.

[0083] In other embodiments, other connection methods can also be adopted between the stationary part 541 and the moving part 543 to realize the relative motion relationship, such as sliding connection. However, compared with other connection methods, the stationary part 541 and the moving part 543 in this embodiment adopt rolling connection, with small frictional resistance and not easily causing jumping and crosstalking, which is beneficial to the sealing stability and reliability.

[0084] Among them, such as Figure 1 and Figure 3As shown, the stationary part 541 is provided with a cooling medium inlet 5412 on one side (e.g., the top) of the cylinder body 1, and a cooling medium outlet 5413 is provided at a position opposite to the cooling medium inlet 5412. And a circle of cooling channels 5411 is provided on the circumferential surface of the stationary part 541, that is, the cooling channel 5411 is an annular channel. The cooling channel 5411 is communicated with an external cooling medium through the cooling medium inlet 5412. The cooling medium can be water, heat-conducting oil, etc. The cooling medium flows in from the cooling medium inlet 5412, flows in the cooling channel 5411, and then flows out from the cooling medium outlet 5413. By providing the cooling channel 5411 in the stationary part 541, the heat generated by the friction between the stationary part 541 and the moving part 543 and the friction of the seal 52 on the rotating disc 4 can be absorbed, which is beneficial to the stability of the sealing effect. Through the selection of the cooling medium and the regulation of the flow rate, the safe control of the operating temperature of the rotating support part 54 and the sealing assembly 5 is realized, and the stable operation under high-temperature working conditions is achieved.

[0085] Among them, as Figure 1 and Figure 3 shown, the sealing device 3 further includes a heat insulation ring 7. The heat insulation ring 7 is an L-shaped structure in cross-section. The heat insulation ring 7 is fixedly connected to the cylinder body 1, and the moving part 543 is fixedly connected to the heat insulation ring 7. Through the above-provided heat insulation ring 7, the high-temperature gas of the cylinder body 1 can be blocked from conducting heat to the sealing device 3, which affects the sealing effect.

[0086] At least one protrusion 41 is provided on at least one side of the rotating disc 4 along the axial direction B. Grooves 513 are provided on both sides of the protrusion 41 along the radial direction A. The relative end faces of the first sealing part 511 and / or the second sealing part 512 and the protrusion 41 are spaced apart along the axial direction B;

[0087] Specifically, as Figure 4 shown, in this embodiment, a protrusion 41 is provided on both sides of the rotating disc 4 along the axial direction B. Viewed from the circumferential direction, each protrusion 41 is a protruding ring structure. The protrusions 41 on the left and right sides are arranged oppositely. Viewed from the radial cross-section of the rotating disc 4, a cross-shaped structure is formed at the end of the rotating disc 4 along the radial direction A. The two grooves 513 are respectively provided on both sides of the protrusion 41 along the radial direction A.

[0088] In the sealing structure on the right side, a sealing medium communication port is provided at the part of the first sealing portion 511 facing the protrusion 41, which is connected to the external sealing medium. For example, a sealing medium inlet 514 is provided at the bottom, and a sealing medium outlet 515 is provided at the top. A relatively small gap is left between the opposite end faces of the first sealing portion 511 and the protrusion 41 along the axial direction B to fill the liquid or gaseous sealing medium. In this way, the liquid or gaseous sealing medium (referred to as sealing medium 1) introduced from the right side enters through the sealing medium inlet 514 at the bottom, flows along the gap in the sealing cavity, and then flows out from the sealing medium outlet 515 at the top. Similarly, in the sealing structure on the left side, a sealing medium communication port is provided at the part of the second sealing portion 512 facing the protrusion 41, which is connected to the external sealing medium. For example, a sealing medium inlet 516 is provided at the bottom, and a sealing medium outlet 517 is provided at the top. A relatively small gap is left between the opposite end faces of the second sealing portion 512 and the protrusion 41 along the axial direction B to fill the liquid or gaseous sealing medium. In this way, the liquid or gaseous sealing medium (referred to as sealing medium 2) introduced from the left side enters through the sealing medium inlet 516 at the bottom, flows along the gap in the sealing cavity, and then flows out from the sealing medium outlet 517 at the top. Sealing medium 1 and sealing medium 2 can be the same substance or different substances, and media such as nitrogen, lubricating oil, and steam are preferred.

[0089] In such a sealing structure, the sealing surface on the rotating disk 4 includes an axial sealing surface 411 and a radial sealing surface 412. The axial sealing surface 411 is the axial surface where the protrusion 41 contacts the seal 52, and the radial sealing surface 412 includes the radial surface of the protrusion 41 and other radial surfaces of the rotating disk 4.

[0090] Compared with the planar 1-shaped rotating disk 4 without the protrusion 41, the cross-shaped rotating disk 4 structure, while retaining the radial sealing surfaces 412 on both sides, also adds an axial static-dynamic sealing surface (i.e., the contact surface between the seal 52 and the protrusion 41), thereby increasing the contact area of the moving sealing surface and improving the overall sealing effect.

[0091] Using a similar principle of increasing the contact area, in other embodiments, at least one recessed structure can also be provided on one or both surfaces of the rotating disk 4 along the axial direction B, and part of the seal 52 is clamped in the recessed structure.

[0092] Through the above - provided protrusions 41 and / or recessed structures, the tortuosity of the sealing path is further increased; an axial sealing surface 411 and a radial sealing surface 412 are formed around the protrusions 41 and / or recessed structures, increasing the contact area of the seal 52 and / or the sealing medium on the sealing path, thereby improving the sealing effect. Among them, the relative end faces of the first sealing portion 511 and / or the second sealing portion 512 and the protrusions 41 are arranged at intervals along the axial direction, so that the sealing medium can flow and fill the sealing cavities on both sides of the protrusions 41 along the radial direction A.

[0093] In other embodiments, the number of protrusions 41 provided on the surfaces on both sides of the rotating disk 4 along the axial direction B can be adjusted as needed. There can be protrusions 41 provided on only one side, or protrusions 41 provided on both sides, or different numbers of protrusions 41 provided on both sides to achieve a better sealing effect. The protrusions 41 on the surfaces on both sides can be arranged oppositely or staggeredly. When the protrusions 41 on both sides of the rotating disk 4 along the axial direction B are arranged oppositely, it is beneficial to simplify the structure of the rotating disk 4 and is easy to process. The number of the sealing medium inlets and the sealing medium outlets can be one respectively, or multiple can be set.

[0094] In this embodiment, the sealing medium communication port is arranged at a position where the first sealing portion 511 and the second sealing portion 512 are opposite to the protrusions 41. Such a position design can stagger the arrangements of the seal 52 and the groove 513 and optimize the structural layout.

[0095] As Figure 3 shown, the pressing portion 53 includes an elastomer 531 and a pressing member 532. The pressing members 532 located on both sides of the rotating disk 4 along the axial direction B respectively extend into the groove 513 from the outside of the first sealing portion 511 and the second sealing portion 512 along the axial direction B and are connected to the elastomer 531, and the elastomer 531 abuts against the seal 52. Specifically, the elastomer 531 is specifically a spring, and the pressing member 532 is a pressing bolt connected to the outer end of the spring. The inner end of the spring abuts against the seal 52. The pressing bolt is threadedly connected to the first sealing portion 511 or the second sealing portion 512. The pressing bolts located on both sides of the rotating disk 4 along the axial direction B respectively screw into the threaded holes from the outside of the first sealing portion 511 and the second sealing portion 512 along the axial direction B, so as to extend into the groove 513 and push the connected spring to press against the seal 52, and the seal 52 abuts against the disk surface of the rotating disk 4, thus achieving sealing. In such a structure, through the elastomer 531 and the pressing member 532, elastic abutment against the seal 52 is realized.

[0096] There are various ways to achieve elastic abutment against the seal 52. It can be that the seal 52 is elastic while the pressing part 53 is not elastic, and the seal 52 abuts against the rotating disk 4 by its own elasticity; or the seal 52 has no elasticity or little elasticity, and the elastic force of the elastic member of the pressing part 53 is relied on to abut the seal 52 against the rotating disk 4; or as in this embodiment, the elastic member of the pressing part 53 has an elastic force, and the seal 52 also has an elastic force, which can achieve a better elastic pressing effect.

[0097] In this embodiment, the pressing member 532 (i.e., the pressing bolt) is threadedly connected to the first sealing part 511 or the second sealing part 512 and can extend in or out, which is a form of realizing movable connection between the pressing member 532 and the first sealing part 511 and the second sealing part 512; in other embodiments, according to different structural forms of the pressing member 532, there are various forms of realizing movable connection, and it is not limited to the threaded connection of this embodiment. In such a connection structure, the pressing member 532 is respectively movably connected to the first sealing part 511 and the second sealing part 512, so that the pressing member 532 can adjust the force of pressing the elastic body 531 in the axial direction B. On the basis that the seal 52 and the elastic member have elastic adjustment, the pressing member 532 can further adjust the degree of compression of the seal 52, so that the seal 52 can fit more closely to the rotating disk 4 and achieve a better sealing effect.

[0098] In this embodiment, the seal 52 is a ring of flexible seal 52 with elasticity and is filled in the groove 513, so this seal 52 is also called a packing seal ring. Using the flexible seal 52 for the seal 52 to make it elastic is a form for the pressing part 53 to achieve elastic abutment against the seal 52, and the flexible material can well fill in the groove 513 and achieve good fitting and sealing with the contacting surface.

[0099] Since there are two grooves 513 on the first sealing part 511 and the second sealing part 512 respectively, and each groove 513 is filled with flexible sealing material, a sealing structure composed of multiple flexible sealing materials is formed in the overall sealing structure, isolating the rotating support part 54 from the complex and harsh environment in the kiln, and expanding the application of this sealing device 3 under harsh conditions such as high-corrosive raw materials and high-purity environments.

[0100] Further, as Figure 1 and Figure 3 shown, a soft connection 6 is adopted between the first sealing part 511 and the end of the hood 2, which can reduce the influence of axial movement on the seal.

[0101] Embodiment 2

[0102] The present embodiment provides a rotary reactor, which is specifically a rotary kiln, including a cylinder 1, a cover head 2 and a sealing device 3 as in Example 1. The rotary reactor improves the tortuosity and length of the sealing path by adopting the sealing device 3 of Example 1, thereby improving the sealing effect; the sealing cavity parts on both sides of the rotating disc 4 are independent of each other and do not interfere with each other, thereby avoiding "sealing short circuit" and improving the reliability and stability of the seal. The pressing part 53 elastically abuts against the sealing member 52, and the sealing member 52 is attached to the disc surface of the rotating disc 4 to form a "brake pad" type tight sealing structure, which can generate active and continuous pressing force according to the jumping and swaying generated by the rotating disc 4, thereby improving the stability of the overall sealing of the rotary reactor. In addition, the pressing part 53 and the sealing member 52 can be disassembled and replaced from both sides of the rotating disc 4, which is convenient for installation and maintenance.

[0103] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A sealing device for a rotary reactor, the rotary reactor comprising a cylinder body and a cover head, the cover head being provided at an end of the cylinder body, the cylinder body being configured to rotate about a central axis, the cover head being fixedly arranged, and the cylinder body being in communication with the cover head, characterized in that, The sealing device includes: A rotating disk, which is sleeved and connected to the outside of the cylinder body, and the disk surface of the rotating disk extends along the radial direction of the cylinder body; A sealing assembly, which includes a sealing part, at least one sealing element and at least one pressing part. The sealing part includes a first sealing part and a second sealing part provided on both axial sides of the rotating disk and spaced from the rotating disk respectively. A sealing cavity communicating with the outside at the outer end of the rotating disk along the radial direction is formed between the first sealing part and the second sealing part and the rotating disk. An external sealing medium is communicated in the sealing cavity. The sealing element is arranged in the sealing cavity. The pressing part extends into the sealing cavity from the outside of the sealing part and elastically presses the sealing element against the disk surface of the rotating disk to limit the leakage of the gas in the cylinder body to the outside.

2. The sealing device according to claim 1, characterized in that, At least one groove is respectively provided on the surfaces of the first sealing part and the second sealing part facing the rotating disk. The sealing element is arranged in the groove, and the pressing part elastically presses against the sealing element to fit the sealing element on the disk surface of the rotating disk.

3. The sealing device according to claim 1, characterized in that, The first sealing part is fixedly connected to the end of the cover head. The sealing device further includes a support part, which includes a stationary part and a moving part that can move relatively. The stationary part is fixedly connected to the second sealing part, and the rotating disk is connected to the outside of the cylinder body through the moving part; Preferably, the stationary part and the moving part are connected by rolling; Preferably, the sealing device further includes a heat insulation ring, and the moving part is fixedly connected to the cylinder body through the heat insulation ring.

4. The sealing device according to claim 2, characterized in that, At least one protrusion is provided on at least one axial side of the rotating disk. The grooves are provided on both radial sides of the protrusion. The relative end faces of the first sealing part and / or the second sealing part and the protrusion are spaced along the axial direction; and / or, at least one concave structure is provided on at least one axial side of the rotating disk, and part of the sealing element is clamped in the concave structure.

5. The sealing device according to any one of claims 1-4, characterized in that, At least one protrusion is provided on both axial sides of the rotating disk; The first sealing part and the second sealing part are provided with a sealing medium communication port for communicating with the external sealing medium at the protrusion; and / or, the protrusions on both axial sides of the rotating disk are arranged oppositely.

6. The sealing device according to claim 2, characterized in that, The pressing part includes an elastic body and a pressing member. The pressing members located on both axial sides of the rotating disk respectively extend into the groove from the outside of the first sealing part and the second sealing part along the axial direction and are connected to the elastic body, and the elastic body presses against the sealing element.

7. The sealing device according to claim 6, characterized in that, The pressing members located on both axial sides of the rotating disk are respectively movably connected to the first sealing part and the second sealing part.

8. The sealing device according to claim 1, characterized in that, The sealing element is a flexible sealing element; and / or, a flexible connection is adopted between the first sealing part and the end of the cover head.

9. The sealing device according to claim 3, characterized in that, The stationary part is provided with a cooling channel, and an external cooling medium is communicated with the cooling channel.

10. A rotary reactor, characterized in that, The rotary reactor includes a cylinder body, a cover head and the sealing device according to any one of claims 1-9.

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