Air-cooled discharge valve

Abstract

The invention relates to the technical field of sludge incineration equipment, in particular to an air-cooled discharge valve. Comprising a valve body, an air cooling pipe bundle, a connecting pipe, a motor and a soot blower. The valve body comprises a cylinder, a solid material inlet and a solid material outlet, the axis of the cylinder is horizontally arranged, and the solid material inlet and the solid material outlet are fixedly connected to the top and the bottom of the cylinder; the air-cooling tube bundle is horizontally mounted in the cylinder, and tube plates at the two ends of the air-cooling tube bundle are hinged to the inner wall of the cylinder; the connecting pipe is fixedly connected to one end of the cylinder, and the connecting pipe is connected with a cooling gas source pipeline; and the motor is fixedly connected in the connecting pipe, is connected with the pipe plate through a transmission device, and drives the air cooling pipe bundle to rotate. High temperature resistance can be achieved, and the material flow can be controlled. The sealing performance is good, the energy utilization efficiency is high, and the service life is long.

Description

Technical Field

[0001] The invention relates to the technical field of sludge incineration equipment, in particular to an air-cooled discharge valve. Background Art

[0002] The main types of discharge valves for sludge incineration systems are rotary and fixed. The former, represented by a star-shaped discharger, is suitable for continuous feeding scenarios; the latter, centered around a gate valve, is often used for high-temperature sealing or intermittent operation. Star-shaped dischargers can control discharge speed but are not resistant to temperatures exceeding 800°C. Gate valves can withstand temperatures of 800°C but cannot control discharge speed.

[0003] New sludge incineration processes use sludge spray drying to instantly dry the sludge. Even after drying, the sludge remains relatively hot. To achieve a fully enclosed conveying process, minimize heat loss, and conserve energy, a pneumatic conveying system is typically installed at the drying tower outlet. Intermittent pneumatic conveying devices cannot meet the requirements for continuous sludge combustion. Therefore, continuous pneumatic conveying is the only option, requiring controlled material flow into the pneumatic conveying system. Consequently, a discharge valve that is both heat-resistant and capable of controlling material flow is urgently needed. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an air-cooled discharge valve that is both resistant to high temperatures and capable of controlling material flow.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A air-cooled discharge valve comprises a valve body, an air-cooled tube bundle, a connecting pipe, a motor and a soot blower; the valve body comprises a cylinder, a solid material inlet and a solid material outlet, the cylinder axis is arranged horizontally, and the solid material inlet and the solid material outlet are fixedly connected to the top and bottom of the cylinder; the air-cooled tube bundle is horizontally installed in the cylinder, and the tube sheets at both ends of the air-cooled tube bundle are hinged to the inner wall of the cylinder; the connecting pipe is fixed to one end of the cylinder, and the connecting pipe is connected to the cooling gas source pipeline; the motor is fixed in the connecting pipe, and the motor is connected to the tube sheet through a transmission device, and drives the air-cooled tube bundle to rotate.

[0007] Furthermore, flanges are provided at both the solid material inlet and the solid material outlet ends.

[0008] Furthermore, the tube sheets at both ends of the air-cooled tube bundle are hinged to the cylinder through bearings, the inner ring of the bearing is mounted on the cylinder, and a convex cylinder is provided on the edge of the tube sheet, which is fixed to the outer ring of the bearing.

[0009] Furthermore, it also includes an outer sleeve, which is fixed to the end of the cylinder and covers the outside of the bearing and the tube plate, and the end of the outer sleeve is provided with a flange.

[0010] Furthermore, bearings are installed at both ends of the cylinder, one end bearing is fixed to the cylinder, and the other end bearing is slidably connected to the cylinder and can move axially.

[0011] Furthermore, the transmission device includes a driving pulley, a driven pulley, a belt and a cam, the cam is fixed to the center of the tube plate, the driven pulley is fixed to the cam, the driving pulley is fixed to the motor output shaft, and the belt is installed on the driving pulley and the driven pulley.

[0012] Furthermore, the soot blower is a sonic soot blower or a shock wave soot blower.

[0013] Furthermore, it also includes a plug-in door, which is installed at the solid material inlet.

[0014] Furthermore, the air-cooling tube bundle includes air-cooling tubes and tube sheets. Circular through holes corresponding to the air-cooling tubes are evenly distributed around the circumference of the tube sheets. The air-cooling tubes are installed between two parallel tube sheets through the circular through holes.

[0015] Furthermore, it also includes a hot air outlet connecting pipe, which is fixed to the other end of the cylinder and connected to the sludge conveying air duct.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention features an air-cooled tube bundle, through which cooling air flows, providing cooling and capable of withstanding temperatures up to 800°C. The tube sheets at both ends of the bundle are hinged to the inner wall of the cylinder. A motor and transmission drive the bundle, driving its rotation. The combined effect of the tube bundle's rotation and the variable-frequency vibration of the sootblower controls the discharge rate of solid material. The compression between the materials prevents their movement, creating a locking effect. This design offers both high-temperature resistance and controlled material flow.

[0018] 2. The present invention offers excellent sealing performance. The outer sleeve is fixed to the end of the cylinder, covering the bearing and the exterior of the tube sheet. The connecting pipe is fixed to the bearing at one end of the cylinder and connected to the cooling gas source pipeline. The outside of the bearing is subject to higher cooling air pressure, while the inside of the bearing is subject to sludge particles. The connection to the furnace is slightly negative pressure, and air is pressed from the outside inward, preventing dust leakage and minimizing the impact on the bearing.

[0019] 3. This invention boasts high energy efficiency. One end of the furnace is connected to the cooling gas source pipe via a connecting pipe, and the other end is connected to the sludge conveying air duct via a hot air outlet connecting pipe. The cooling air heats up after passing through the high-temperature sludge particles and the motor. This heated air can then be directly blown into the furnace as sludge conveying air. 95% of the heat is effectively utilized, resulting in significant energy savings.

[0020] 4. The motor of the present invention is fixed in the connecting pipe and placed in the cooling air inlet duct. The motor is forced to cool by the cooling air and cleaned by the soot blower, so that the motor has a longer service life.

[0021] 5. The present invention is provided with a gate which is installed at the solid material inlet. After the rotation stops, the material in the valve is completely discharged, so the starting torque is low.

[0022] 6. The present invention features bearings mounted on both ends of the cylinder. One bearing is fixed to the cylinder, while the other is slidably connected to the cylinder, enabling axial movement. The air-cooling tube bundle is hinged to the cylinder via bearings at both ends, with one end being fixed and the other being movable. The other end of the air-cooling tube bundle can slide axially to absorb deformation caused by temperature fluctuations and extend the life of the tube bundle.

[0023] 7. The present invention adopts an acoustic soot blower or a shock wave soot blower, which can adjust the vibration frequency according to the unloading situation, and use the vibration of the air to drive the air-cooled tube bundle to vibrate, thereby loosening and peeling off the sludge particles, and forming a fluid state of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic front view of the structure of the present invention.

[0025] Figure 2 It is a schematic front cross-sectional view of the structure of the present invention.

[0026] Figure 3 for Figure 1 Cross-sectional view of the solid material inlet and outlet.

[0027] Figure 4 for Figure 1 Cross-sectional view of the bearing part.

[0028] Figure 5 for Figure 1 Cross-sectional view of the transmission device.

[0029] Figure 6 It is a structural schematic diagram of the movable end of the present invention.

[0030] Figure 7 This is a schematic diagram of the fixed end structure of the present invention.

[0031] Markings in the figure: 1. Valve body; 2. Air-cooling tube bundle; 3. Connecting pipe; 4. Hot air outlet connecting pipe; 5. Motor; 6. Transmission device; 7. Jacket; 8. Soot blower; 9. Bearing; 11. Solid material inlet; 12. Solid material outlet; 13. Cylinder; 21. Air-cooling tube; 22. Left tube sheet; 23. Right tube sheet; 24. Mounting hole; 25. Cam; 61. Driving pulley; 62. Driven pulley; 63. Belt; 64. Cam shaft; 71. Cylindrical sleeve; 72. Annular plate. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below. 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] In the description of the present invention, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] like Figure 1-7 As shown, an air-cooled discharge valve includes a valve body 1, an air-cooled tube bundle 2, a connecting pipe 3, a hot air outlet connecting pipe 4, a motor 5, a transmission device 6, a jacket 7, and a soot blower 8. The valve body 1, the connecting pipe 3, and the hot air outlet connecting pipe 4 are all made of heat-resistant steel.

[0039] The valve body 1 includes a cylinder 13, a solid material inlet 11, and a solid material outlet 12. The cylinder 13 is a circular cylinder with a horizontal axis. The solid material inlet 11 and the solid material outlet 12 are fixed to the top and bottom of the cylinder 13. The solid material inlet 11 and the solid material outlet 12 are fixed to the middle of the cylinder wall of the cylinder 13. The connecting pipe 3 and the hot air outlet connecting pipe 4 are aligned with the axis of the cylinder 13. The connecting pipe 3 is fixed to the right side of the cylinder 13, and the hot air outlet connecting pipe 4 is fixed to the left side of the cylinder 13. The hot air outlet connecting pipe 4 is connected to the sludge conveying air duct, and the connecting pipe 3 is connected to the cooling gas source pipeline. The end faces of the solid material inlet 11 and the solid material outlet 12 are both equipped with flanges 100.

[0040] like Figure 2-4 As shown, the air-cooling tube bundle 2 includes air-cooling tubes 21, a left tube sheet 22, and a right tube sheet 23. The left and right tube sheets 22 and 23 are circular plates, each of which is covered with mounting holes 24 corresponding to the air-cooling tubes 21. The mounting holes 24 are uniformly sized, circular through-holes arranged in a pattern of concentric rings. The holes in each ring are evenly distributed along the circumference, with equal radial spacing between the rings. The air-cooling tubes 21 are installed between the parallel left and right tube sheets 22 and 23 through the mounting holes 24.

[0041] like Figure 6 、 Figure 7 As shown, the left and right tube sheets 22 and 23 of the air-cooling tube bundle 2 are hinged to the left and right ends of the valve body 1 via bearings 9, allowing the air-cooling tube bundle 2 to be installed within the cylinder 13 and rotate about the cylinder's axis. The left side is the movable end of the air-cooling tube bundle 2, while the right side is the fixed end. The inner ring of the left-end bearing 9 is slidably connected to the outer wall of the left end of the cylinder 13, allowing axial movement of the left-end bearing 9; the inner ring of the right-end bearing 9 is fixedly connected to the outer wall of the right end of the cylinder 13. The movable end is used to absorb deformation of the air-cooling tubes 21 caused by temperature changes, thereby increasing the service life of the air-cooling tube bundle 2. The edges of the left and right tube sheets 22 and 23 are each equipped with a protrusion 25 perpendicular to the plate surface. The inner wall of the protrusion 25 is fixedly connected to the outer ring of the bearing 9.

[0042] The outer sleeve 7 consists of a cylindrical sleeve 71 and an annular plate 72 vertically fixed to one end of the cylindrical sleeve 71. The bottom end of the annular plate 72 is fixed to the outer wall of the cylinder 13. The cylindrical sleeve 71 covers the bearing 9 and the outside of the tube sheet. A flange 100 is fixed to the end of the cylindrical sleeve 71. The left outer sleeve 7 is flange-connected to the hot air outlet connecting pipe 4 via flange 100, and the right outer sleeve 7 is flange-connected to the connecting pipe 3 via flange 100, thereby achieving a detachable connection between the valve body 1 and the hot air outlet connecting pipes 4 and 3.

[0043] Cooling gas is introduced into air-cooling pipe 21 through connecting pipe 3. The cooling air flows within air-cooling pipe 21, while solid material enters cylinder 13 of valve body 1 through solid material inlet 11. The solid material flows vertically outside air-cooling pipe 21. Because air-cooling pipe 21 is horizontally positioned, the solid material flow is perpendicular to the cooling gas flow. The vast majority of the cooling air enters air-cooling pipe 21 through connecting pipe 3, while a small amount enters valve body 1 through the bearing clearance.

[0044] like Figure 5 As shown, the transmission device 6 includes a driving pulley 61, a driven pulley 62, a belt 63, and a cam 64. The cam is fixed to the center of the right tube sheet 23, the driven pulley 62 is fixed to the cam 64, the driving pulley 61 is fixed to the output shaft of the motor 5, and the belt 63 is installed on the driving pulley 61 and the driven pulley 62. The motor 5 drives the driving pulley 61 to rotate, which in turn drives the driven pulley 62 and the cam 64 through the transmission of power from the belt 63, thereby driving the right tube sheet 23 to rotate, and the entire air-cooled tube bundle 2 to rotate about the axis of the valve body 1.

[0045] like Figure 2 As shown, the soot blower 8 is a sonic soot blower or a shock wave soot blower, and is installed in the connecting pipe 3. The soot blower 8 can adjust the vibration frequency according to the discharge situation, and use the vibration of the air to drive the air-cooled tube bundle 2 to vibrate, thereby loosening the sludge particles, peeling them off, and forming a fluid state of the sludge.

[0046] The device also includes a gate, which is installed at the solid material inlet 11. The discharge valve must generally be used in conjunction with the gate, and the gate must be closed before starting and stopping.

[0047] The present invention features an air-cooled tube bundle 2, through which cooling air flows, reducing temperatures and enabling the valve to withstand temperatures as high as 800°C. This excellent cooling performance effectively cools the valve body and reduces valve deformation. The rotation of the air-cooled tube bundle 2 and the variable-frequency vibration of the sootblower 8 control the discharge speed of the solid material, while the compression between the materials prevents their movement, providing a locking effect.

[0048] The present invention offers excellent sealing performance. The outer sleeve 7 is fixed to the end of the cylinder, covering the bearing 9 and the exterior of the tube sheet. The connecting pipe 3 is fixed to the bearing 9 at one end of the cylinder 13 and is connected to the cooling gas source pipeline. The outside of the bearing 9 is subject to high cooling air pressure, while the inside of the bearing 9 is filled with sludge particles. The connection to the furnace is at a slightly negative pressure, and air is pressed inward from the outside, preventing dust leakage and minimizing the impact on the bearing.

[0049] The present invention boasts high energy efficiency. One end of the furnace is connected to the cooling gas source pipe via a connecting pipe 3, and the other end is connected to the sludge conveying air duct via a hot air outlet connecting pipe 4. The cooling air heats up after passing through the high-temperature sludge particles and the motor. This heated air can then be directly blown into the furnace as sludge conveying air. 95% of the heat is effectively utilized, resulting in significant energy savings.

[0050] The above description is only part of the specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the protection scope of the present invention.

Claims

1. An air-cooled discharge valve, characterized in that: Including valve body, air-cooled tube bundle, connecting pipe, motor and soot blower; The valve body includes a cylinder, a solid material inlet, and a solid material outlet. The axis of the cylinder is horizontally arranged, and the solid material inlet and the solid material outlet are fixedly connected to the top and bottom of the cylinder. The air-cooling tube bundle is horizontally installed in the cylinder, and the tube sheets at both ends of the air-cooling tube bundle are hinged to the inner wall of the cylinder; The connecting pipe is fixed to one end of the cylinder and is connected to the cooling gas source pipeline; The motor is fixed in the connecting pipe, connected to the tube plate through a transmission device, and drives the air-cooled tube bundle to rotate.

2. The air-cooled discharge valve according to claim 1, characterized in that: The solid material inlet and the solid material outlet are both provided with flanges.

3. The air-cooled discharge valve according to claim 1, characterized in that: The tube sheets at both ends of the air-cooled tube bundle are hinged to the cylinder through bearings, the inner ring of the bearing is mounted on the cylinder, and a convex cylinder is provided on the edge of the tube sheet, which is fixed to the outer ring of the bearing.

4. The air-cooled discharge valve according to claim 3, characterized in that: It also includes a jacket which is fixed to the end of the cylinder and covers the outside of the bearing and the tube plate. A flange is provided at the end of the jacket.

5. The air-cooled discharge valve according to claim 3, characterized in that: Bearings are installed at both ends of the cylinder, one end bearing is fixed to the cylinder, and the other end bearing is slidably connected to the cylinder and can move axially.

6. The air-cooled discharge valve according to claim 1, characterized in that: The transmission device includes a driving pulley, a driven pulley, a belt and a cam shaft, the cam shaft is fixed to the center of the tube plate, the driven pulley is fixed to the cam shaft, the driving pulley is fixed to the motor output shaft, and the belt is installed on the driving pulley and the driven pulley.

7. The air-cooled discharge valve according to claim 1, characterized in that: The soot blower is a sonic soot blower or a shock wave soot blower.

8. The air-cooled discharge valve according to claim 1, characterized in that: It also includes a slide door, which is installed at the solid material inlet.

9. The air-cooled discharge valve according to claim 1, characterized in that: The air-cooling tube bundle includes air-cooling tubes and tube sheets. Circular through holes corresponding to the air-cooling tubes are evenly distributed around the tube sheets. The air-cooling tubes are installed between two parallel tube sheets through the circular through holes.

10. The air-cooled discharge valve according to claim 1, characterized in that: It also includes a hot air outlet connecting pipe, which is fixed to the other end of the cylinder and connected to the sludge conveying air duct.

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