Rotary soot blowing device

Abstract

This application discloses a rotary soot blowing device, comprising an inlet pipe and an outlet pipe respectively provided at both ends of an air duct, the inlet pipe and the outlet pipe being connected by a heat exchange pipe, a heat exchanger being provided inside the heat exchange pipe, an installation cavity being provided on one side of the outlet pipe, a bearing seat being provided inside the installation cavity, one end of an air blowing pipe being provided inside the installation cavity, the air blowing pipe passing through the bearing seat and being rotatably connected to the bearing seat, one end of the air blowing pipe being nested and connected to one end of a sleeve, the other end of the sleeve being connected to a steam box through a vent pipe, the other end of the air blowing pipe extending into the heat exchange pipe, and multiple air outlets being provided on the outer wall of the extended end of the air blowing pipe; high-pressure steam is generated by the steam box and injected into the air blowing pipe through the vent pipe and the sleeve, the other end of the air blowing pipe extending into the heat exchange pipe, and multiple air outlets being provided on the outer wall of the extended end of the air blowing pipe, pressurized steam being injected into the heat exchanger through the air outlets to achieve rotary blowing away of the ash adhering to the heat exchanger.

Description

Technical Field

[0001] This utility model belongs to the technical field of carbon fiber production and processing equipment, specifically relating to a rotary dust blowing device. Background Technology

[0002] Carbonization is the process of carbon fiber structure formation, that is, polyacrylonitrile-based pre-oxidized fibers undergo carbonization. The reaction is usually carried out in an inert gas environment at 300-800℃ to remove non-carbon elements such as nitrogen, hydrogen, and oxygen from the carbonized material. The waste gas generated by carbonization is discharged from the carbonization furnace through the exhaust pipe and is usually discharged after high-temperature treatment to meet the standards.

[0003] Carbonized waste gas generates a large amount of recyclable heat after heat treatment. Heat exchangers are usually used to collect and utilize the heat from the waste gas. In practice, carbonized waste gas contains adhesive ash, such as impurity particles or carbon black particles present in the carbonized raw materials. These particles are easily deposited by physical adsorption or chemical reaction on the heat exchange surface at a lower temperature. The resulting ash layer will block heat transfer and thus affect the heat exchange efficiency. Utility Model Content

[0004] This application proposes a rotary soot blowing device, which can be used to perform soot blowing on heat exchange devices in the flue of carbonized waste gas heat recovery, so as to improve the heat exchange efficiency of the heat exchange devices.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rotary soot blowing device includes an air duct with an inlet pipe and an outlet pipe at both ends. The inlet pipe and the outlet pipe are connected by a heat exchange pipe, which contains a heat exchanger. An installation cavity is provided on one side of the outlet pipe, and a bearing seat is provided within the installation cavity. One end of a blowing pipe is located within the installation cavity, passing through the bearing seat and rotatably connected to it. One end of the blowing pipe is nested with one end of a sleeve, and the other end of the sleeve is connected to a steam box via a vent pipe. The other end of the blowing pipe extends into the heat exchange pipe. Multiple air outlets are provided on the outer wall of the extended end of the blowing pipe. An external gear ring is connected to the outer wall of one end of the blowing pipe, meshing with a rotating gear. The rotating gear is connected to a motor drive.

[0007] In one embodiment of this application, a transition pipe is provided at the insertion end of the air blowing pipe within the heat exchange pipe.

[0008] In one embodiment of this application, a dust collection hopper is provided at the bottom end of the heat exchange pipe, and the dust collection hopper is located below the heat exchanger.

[0009] In one embodiment of this application, the lower part of the ash collection hopper is connected to an ash discharge pipe, and a first control valve is installed on the ash discharge pipe.

[0010] In one embodiment of this application, the steam box is installed on the side wall of the outlet pipe, and a heat exchange plate is provided at the connection between the steam box and the outlet pipe.

[0011] In one embodiment of this application, a second control valve is installed on the vent pipe.

[0012] In one embodiment of this application, the motor is disposed at the top of the mounting cavity, the upper part of the mounting cavity is provided with an opening, and the rotating gear meshes with the outer gear ring on the outer wall of the air blowing pipe inside the mounting cavity through the opening.

[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: This application generates high-pressure steam through a steam box and injects it into a blowing pipe through a vent pipe and a sleeve. The other end of the blowing pipe extends into the heat exchange pipe, and multiple air outlets are provided on the outer wall of the extended end of the blowing pipe. Pressurized steam is injected into the heat exchanger through the air outlets to blow away the ash adhering to the heat exchanger. Furthermore, an external gear ring is connected to the outer wall of one end of the blowing pipe, and the external gear ring meshes with a rotating gear. The rotating gear is connected to a motor drive, that is, the motor drives the rotating gear to rotate, which in turn drives the external gear ring to rotate, which in turn drives the blowing pipe to rotate. This causes the air outlet of the blowing pipe to rotate and change the direction of the pressurized steam injection when steam is injected, increasing the range of spraying and scouring of the ash on the heat exchanger by the blowing pipe, making the ash on the heat exchanger more thoroughly cleaned by the blowing pipe, which is beneficial to improving the heat exchange efficiency of the heat exchanger. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic cross-sectional view of a rotary soot blowing device provided in an embodiment of this application;

[0016] Figure 2 This is a schematic cross-sectional view of a rotary soot blowing device provided in an embodiment of this application;

[0017] Figure 3 This is a top view of a rotary soot blowing device provided in an embodiment of this application;

[0018] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at BB;

[0019] Figure 5This is a three-dimensional structural diagram of a rotary soot blowing device provided in an embodiment of this application;

[0020] Figure 6 This is a three-dimensional structural diagram of a rotary soot blowing device provided in an embodiment of this application;

[0021] Figure 7 This is a schematic diagram of the air blowing pipe structure of a rotary soot blowing device provided in an embodiment of this application.

[0022] In the diagram: airway 100;

[0023] Intake pipe 1;

[0024] Air outlet pipe 2;

[0025] Heat exchange pipe 3, ash collection hopper 31, ash discharge pipe 311, first control valve 312;

[0026] Heat exchanger 4;

[0027] Mounting cavity 5, bearing housing 51;

[0028] Air blowing pipe 6, air outlet 61, external gear ring 62, transition pipe 63;

[0029] Sleeve 7, vent pipe 71, steam box 72, second control valve 73;

[0030] Motor 8, rotating gear 81. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0032] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0035] This embodiment provides a rotary soot blowing device, see reference. Figures 1-7 As shown, the system includes an air passage 100, with an inlet pipe 1 and an outlet pipe 2 at each end. The inlet pipe 1 and the outlet pipe 2 are connected by a heat exchange pipe 3, which houses a heat exchanger 4. An installation cavity 5 is provided on one side of the outlet pipe 2, and a bearing seat 51 is provided inside the installation cavity 5. One end of an air blowing pipe 6 is provided inside the installation cavity 5. The air blowing pipe 6 passes through the bearing seat 51 and is rotatably connected to it. One end of the air blowing pipe 6 is nested with one end of a sleeve 7. The other end of the sleeve 7 is connected to a steam box 72 via a vent pipe 71. The other end of the air blowing pipe 6 extends into the heat exchange pipe 3. Multiple air outlets 61 are provided on the outer wall of the extended end of the air blowing pipe 6. An external gear ring 62 is connected to the outer wall of one end of the air blowing pipe 6. The external gear ring 62 meshes with a rotating gear 81, which is connected to a motor 8 for transmission.

[0036] In the above embodiment, an inlet pipe 1 and an outlet pipe 2 are respectively provided at both ends of the air passage 100, and the inlet pipe 1 and the outlet pipe 2 are connected by a heat exchange pipe 3. A heat exchanger 4 is provided in the heat exchange pipe 3, and the heat exchange components of the heat exchanger 4 are arranged in the heat exchange pipe 3. The heat exchange components can be heat exchange plates or heat exchange tubes. That is, the high-temperature exhaust gas enters the heat exchange pipe 3 through the inlet pipe 1 and exchanges heat with the heat exchange part of the heat exchanger 4 before flowing out of the heat exchange pipe 3 through the outlet pipe 2. An installation cavity 5 is provided on one side of the outlet pipe 2, and a bearing seat 51 is provided in the installation cavity 5. A support seat is provided at the lower part of the bearing seat 51 for mounting and supporting the bearing seat 51. One end of the air blowing pipe 6 is provided in the installation cavity 5. The outer wall of the air blowing pipe 6 is sleeved in the rotating bearing in the bearing seat 51, that is, the air blowing pipe 6 is rotatably connected to the bearing seat 51, and the bearing seat 51 provides rotatable support for the air blowing pipe 6 so that the air blowing pipe 6 can rotate around the center of the bearing seat 51. Furthermore, such as Figure 4As shown, one end of the air blowing pipe 6 is nested with one end of the sleeve 7 (through an annular groove between the outer wall of the air blowing pipe 6 and the inner wall of the sleeve 7), allowing the insertion end of the air blowing pipe 6 within the sleeve 7 to rotate. The other end of the sleeve 7 is connected to the steam box 72 via a vent pipe 71. The steam box 72 generates high-pressure steam, which is injected into the air blowing pipe 6 through the vent pipe 71 and the sleeve 7. The other end of the air blowing pipe 6 extends into the heat exchange pipe 3, and multiple air outlets 61 are provided on the outer wall of the extended end of the air blowing pipe 6. The air outlets 61 are positioned facing the heat exchanger 4 on the inner wall of the heat exchange pipe 3. Pressurized steam is injected into the heat exchanger 4 through the air outlets 61 to blow away the accumulated ash adhering to the heat exchanger 4, preventing the ash layer from obstructing heat transfer and improving the heat exchange efficiency of the heat exchanger 4. Furthermore, an external gear ring 62 is connected to the outer wall of one end of the air blowing pipe 6, and the external gear ring 62 meshes with the rotating gear 81. The rotating gear 81 is connected to the motor 8 for transmission. That is, the motor 8 drives the rotating gear 81 to rotate, which in turn drives the external gear ring 62 to rotate, which in turn drives the air blowing pipe 6 to rotate. This causes the air outlet 61 of the air blowing pipe 6 to rotate and change the direction of the steam injection when steam is injected, which increases the range of the air blowing pipe 6 spraying and rinsing the ash on the heat exchanger 4. Compared with the rinsing of the fixed nozzle, the air blowing pipe 6 can rinse the ash on the heat exchanger 4 more thoroughly, which is beneficial to improving the heat exchange efficiency of the heat exchanger 4.

[0037] In one embodiment of this application, see reference Figure 1 and Figure 7 As shown, the air blowing pipe 6 has a transition pipe 63 at its insertion end inside the heat exchange pipe 3.

[0038] In the above embodiment, the transition pipe 63 is set in a conical transition shape, so that the pipe section of the blowing pipe 6 in the installation cavity 5 transitions to the smaller diameter of the pipe section of the blowing pipe 6 in the heat exchange pipe 3. On the one hand, reducing the pipe diameter can increase the gas flow rate while keeping the air volume unchanged, thereby improving the impact effect of the airflow on the ash accumulation. On the other hand, reducing the pipe diameter of the blowing pipe 6 in the heat exchange pipe 3 prevents the blowing pipe 6 from occupying too much space in the heat exchange pipe 3, thereby improving the smoothness of the exhaust gas flow in the heat exchange pipe 3.

[0039] In one embodiment of this application, see [reference] Figure 2 As shown, a dust collection hopper 31 is provided at the bottom end of the heat exchange pipe 3, and the dust collection hopper 31 is located below the heat exchanger 4.

[0040] In the above embodiment, the ash collection hopper 31 is used to contain the ash blown off from the heat exchanger 4. The ash deposited in the ash collection hopper 31 is convenient for cleaning the ash later.

[0041] In one embodiment of this application, see reference Figure 2As shown, the lower part of the ash collection hopper 31 is connected to an ash discharge pipe 311, and a first control valve 312 is installed on the ash discharge pipe 311.

[0042] In the above embodiment, the first control valve 312 is in the closed state in the initial state. When the air inlet pipe 1 does not supply exhaust gas, opening the first control valve 312 can be used to discharge the ash accumulated in the ash collection hopper 31 through the ash discharge pipe 311, which is beneficial to improving the convenience of ash cleaning.

[0043] In one embodiment of this application, see reference Figure 2 As shown, the steam box 72 is installed on the side wall of the steam outlet pipe 2, and a heat exchange plate is provided at the connection between the steam box 72 and the steam outlet pipe 2.

[0044] In the above embodiment, the exhaust gas in the heat exchange pipe 3 will have residual heat after heat exchange. A heat exchange plate is provided at the connection between the steam box 72 and the outlet pipe 2. The water in the steam box 72 can be preheated through the heat exchange plate to reduce the energy consumed in heating the water in the steam box 72 to form steam. This is beneficial to improving the utilization rate of exhaust gas heat energy and reducing the heating energy consumption of the steam box 72.

[0045] In one embodiment of this application, see reference Figure 2 As shown, a second control valve 73 is installed on the vent pipe 71.

[0046] In the above embodiment, the second control valve 73 installed on the vent pipe 71 can be used to regulate the gas flow rate from the steam box 72 into the blowing pipe 6, preventing excessive airflow from impacting and damaging the soot blowing components, which is beneficial to improving the safety of the device operation.

[0047] In one embodiment of this application, see reference Figure 2 As shown, the motor 8 is located at the top of the mounting cavity 5, and the upper part of the mounting cavity 5 has an opening. The rotating gear 81 meshes with the outer gear ring 62 on the outer wall of the air blowing pipe 6 inside the mounting cavity 5 through the opening.

[0048] In the above embodiment, the motor 8 is placed outside the mounting cavity 5 to facilitate heat dissipation of the motor 8, prevent the motor 8 from easily malfunctioning and reducing its service life when operating in a high-temperature environment, and thus improve the stability of the device operation.

[0049] In actual use, the inlet pipe 1 and outlet pipe 2 are connected by a heat exchange pipe 3. A heat exchanger 4 is installed inside the heat exchange pipe 3. The heat exchanger 4 can be a heat exchange plate or a heat exchange tube. That is, the high-temperature exhaust gas enters the heat exchange pipe 3 through the inlet pipe 1 and exchanges heat with the heat exchanger 4 before flowing out of the heat exchange pipe 3 through the outlet pipe 2. An installation cavity 5 is provided on one side of the outlet pipe 2, and a bearing seat 51 is provided inside the installation cavity 5. A support seat is provided at the lower part of the bearing seat 51 to support the bearing seat 51. One end of the blowing pipe 6 is provided inside the installation cavity 5. The outer wall of the blowing pipe 6 is sleeved inside the bearing seat 51 and rotatably connected to the bearing seat 51. A steam box 72 is used to generate high-pressure steam and inject it into the blowing pipe 6 through the vent pipe 71 and the sleeve 7. The other end of the blowing pipe 6 extends into the heat exchange pipe 3, and multiple air outlets 61 are provided on the outer wall of the extended end of the blowing pipe 6. The air outlets 61 are positioned facing the heat exchanger 4 on the inner wall of the heat exchange pipe 3, and pressurized steam is injected into the heat exchanger 4 through the air outlets 61. An external gear ring 62 is connected to the outer wall of one end of the blowing pipe 6, and the external gear ring 62 meshes with a rotating gear 81. The rotating gear 81 is connected to a motor 8 for transmission. That is, the motor 8 drives the rotating gear 81 to rotate, which in turn drives the external gear ring 62 to rotate, which in turn drives the blowing pipe 6 to rotate. This causes the air outlets 61 of the blowing pipe 6 to rotate and change the direction of the pressurized steam injection when steam is injected, which increases the range of the blowing pipe 6 spraying and rinsing the ash accumulated on the heat exchanger 4. Compared with the rinsing of a fixed nozzle, the blowing pipe 6 can more thoroughly clean the ash accumulated on the heat exchanger 4, thereby improving the heat exchange efficiency of the heat exchanger 4.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotary soot blowing device, characterized in that, The system includes an air passage (100), with an inlet pipe (1) and an outlet pipe (2) at both ends. The inlet pipe (1) and the outlet pipe (2) are connected by a heat exchange pipe (3), which houses a heat exchanger (4). An installation cavity (5) is provided on one side of the outlet pipe (2), and a bearing housing (51) is provided in the installation cavity (5). One end of a blowing pipe (6) is provided in the installation cavity (5), and the blowing pipe (6) passes through the bearing housing (51) and connects with the bearing housing (51). The air blowing pipe (6) is rotatably connected, with one end of the air blowing pipe (6) nested with one end of the sleeve (7). The other end of the sleeve (7) is connected to the steam box (72) through the air pipe (71). The other end of the air blowing pipe (6) extends into the heat exchange pipe (3). The outer wall of the extended end of the air blowing pipe (6) is provided with multiple air outlets (61). An external gear ring (62) is connected to the outer wall of one end of the air blowing pipe (6). The external gear ring (62) meshes with the rotating gear (81). The rotating gear (81) is connected to the motor (8) for transmission.

2. The rotary soot blowing device according to claim 1, characterized in that, The air blowing pipe (6) has a transition pipe (63) at its insertion end inside the heat exchange pipe (3).

3. The rotary soot blowing device according to claim 1, characterized in that, The bottom end of the heat exchange pipe (3) is provided with an ash collection hopper (31), which is located below the heat exchanger (4).

4. The rotary soot blowing device according to claim 3, characterized in that, The lower part of the ash collection hopper (31) is connected to the ash discharge pipe (311), and the ash discharge pipe (311) is equipped with a first control valve (312).

5. The rotary soot blowing device according to claim 1, characterized in that, The steam box (72) is installed on the side wall of the air outlet pipe (2), and a heat exchange plate is provided at the connection between the steam box (72) and the air outlet pipe (2).

6. The rotary soot blowing device according to claim 5, characterized in that, A second control valve (73) is installed on the vent pipe (71).

7. The rotary soot blowing device according to any one of claims 1-6, characterized in that, The motor (8) is located at the top of the mounting cavity (5), and the upper part of the mounting cavity (5) has an opening. The rotating gear (81) meshes with the outer gear ring (62) on the outer wall of the air blowing pipe (6) inside the mounting cavity (5) through the opening.

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