Continuous blanking cyclone cylinder

Abstract

The continuous discharging cyclone cylinder comprises a cylinder body, a discharging elephant trunk, an air inducing pipe and an air guiding mechanism, the upper portion of the cylinder body is provided with an air inlet and an air outlet, the bottom of the cylinder body is connected with a discharging pipe, the discharging elephant trunk is connected to the bottom of the discharging pipe, and the included angle between the discharging elephant trunk and the discharging pipe is an obtuse angle; the air inducing pipe is connected between the discharging chute and the cylinder body, the air inducing pipe extends into the cylinder body for a certain distance, a balance pipe is connected between the air inducing pipe and the discharging pipe, the air guiding mechanism is arranged in the cylinder body, and the air guiding mechanism is matched with the exhaust outlet to guide return air of the air inducing pipe to the exhaust outlet through the air guiding mechanism and discharge the return air out of the cylinder body. Continuous and stable discharging can be achieved, interference of return air on material sedimentation is reduced, the gas-solid separation efficiency is kept to be 80% or above, and normal operation of the system is guaranteed. A discharging valve is omitted, the problems that materials block the discharging valve in the high-temperature environment, the discharging valve breaks down and the like are solved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of material conveying and gas-solid separation, and particularly to a continuous feeding cyclone. Background Art

[0002] Traditional cyclones achieve gas-solid separation through centrifugal force, but there are the following problems:

[0003] 1. Dependence on discharge valves: A discharge valve (such as a flap valve or a rotary airlock) needs to be configured at the discharge port to prevent gas leakage. However, the valve body is prone to jamming and wear, resulting in material blockage or air return, which affects continuous production.

[0004] 2. Secondary dust generation: When the separated material falls, it is easily disturbed by the back-mixed air flow, forming secondary entrainment, which reduces the separation efficiency.

[0005] 3. Structural limitations: The conventional guide cone design cannot effectively balance gas flow and material sedimentation, resulting in high pressure loss (usually > 1000 Pa) and increased energy consumption.

[0006] 4. Usage environment limitations: Especially in the field of calcined kaolin, due to the nature of the material itself, and the low particle size of the calcined kaolin raw material, usually 325 mesh, and the calcination temperature is between 1000 and 1300 °C, the material shows a certain viscosity in the high-temperature environment. The air lock valve will cause the material to stay and stick to the inner wall of the cyclone, causing blockage of the cyclone. In addition, the high-temperature environment often causes failures of the air lock valve.

[0007] Existing improvement solutions usually add guide plates at the bottom of the cyclone or adjust the cone angle. Although the separation effect can be partially improved, the problems of dependence on discharge valves and air return interference still cannot be solved. Summary of the Invention

[0008] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the present invention provides a continuous feeding cyclone to achieve continuous and stable discharging, reduce the interference of air return on material sedimentation, and ensure the separation efficiency and normal operation of the system.

[0009] An embodiment of the present invention provides a continuous feeding cyclone, comprising: a cylinder body, a discharge chute, an air draft pipe and a wind guiding mechanism. The upper part of the cylinder body has an air inlet and an air outlet. The air inlet is used for introducing air into the interior of the cylinder body to form a swirling flow field. The bottom of the cylinder body is connected to a discharge pipe, and the discharge pipe is arranged vertically. The discharge chute is connected to the bottom of the discharge pipe, and the included angle between the discharge chute and the discharge pipe is an obtuse angle. The air draft pipe is connected between the discharge chute and the cylinder body, and the air draft pipe extends into the interior of the cylinder body for a certain distance. A balance pipe is connected between the air draft pipe and the discharge pipe. The air draft pipe is respectively communicated with the discharge chute, the cylinder body and the balance pipe, so as to return the air entering the discharge pipe to the cylinder body through the air draft pipe. The wind guiding mechanism is arranged inside the cylinder body and there is a space for the swirling flow field and the material to pass between the wind guiding mechanism and the inner wall of the cylinder body. The wind guiding mechanism cooperates with the air outlet to guide the return air of the air draft pipe to the air outlet through the wind guiding mechanism and discharge it from the cylinder body.

[0010] In some embodiments, the wind guiding mechanism includes a wind guiding conical cylinder and a wind guiding pipe. The wind guiding conical cylinder has an open end and a reduced end along the axial direction. The open end of the wind guiding conical cylinder faces downward, and the reduced end of the wind guiding conical cylinder faces the air outlet. The wind guiding pipe is arranged vertically, and the wind guiding pipe is fixedly connected to the reduced end of the wind guiding conical cylinder. The wind guiding pipe is located directly below the air outlet.

[0011] In some embodiments, the wind guiding mechanism is fixedly connected to the interior of the cylinder body.

[0012] In some embodiments, an inner cylinder is fixedly connected at the air outlet. There is a gap between the inner cylinder and the wind guiding pipe in the vertical direction. The ratio of the inner diameter of the wind guiding pipe to the inner diameter of the inner cylinder is 0.1 - 0.3:1.

[0013] In some embodiments, the inner cylinder, the wind guiding pipe, the wind guiding conical cylinder, the cylinder body and the discharge pipe are coaxially arranged.

[0014] In some embodiments, the discharge pipe and the air draft pipe are arranged in parallel.

[0015] In some embodiments, the balance pipe is inclined upward in the direction towards the air draft pipe.

[0016] In some embodiments, a plurality of balance pipes are provided and are parallel to each other.

[0017] In some embodiments, the cylinder body includes a straight cylinder section and a conical cylinder section. The conical cylinder section is connected below the straight cylinder section. The conical cylinder section has an open end and a reduced end along the axial direction. The air draft pipe extends into the interior of the conical cylinder section for a certain distance. The open end of the wind guiding conical cylinder is located inside the conical cylinder section, and the reduced end of the wind guiding conical cylinder is located inside the straight cylinder section. The air inlet is located at the top of the side wall of the straight cylinder section.

[0018] In some embodiments, the ratio of the inner diameter of the air guide pipe to the inner diameter of the inner cylinder is 0.1 to 0.3:1, the ratio of the inner diameter of the balance pipe to the inner diameter of the discharge pipe is 0.1 to 0.3:1, and the ratio of the inner diameter of the air induction pipe to the inner diameter of the discharge pipe is 0.1 to 0.3:1. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings.

[0020] Wherein:

[0021] Figure 1 is a schematic structural diagram of a continuous feeding cyclone cylinder in an embodiment of the present invention;

[0022] Reference Signs:

[0023] 1, air guide cone cylinder; 2, air guide pipe; 3, discharge pipe; 4, air induction pipe; 5, balance pipe; 6, discharge chute; 7, air inlet; 8, inner cylinder; 9, cylinder body; 91, straight cylinder section; 92, cone cylinder section. Detailed Embodiments

[0024] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] The continuous feeding cyclone cylinder according to an embodiment of the present invention will be described below with reference to the drawings.

[0026] As Figure 1 shown, an embodiment of the present invention provides a continuous feeding cyclone cylinder, including: a cylinder body 9, a discharge chute 6, an air induction pipe 4 and a wind guiding mechanism. The upper part of the cylinder body 9 has an air inlet 7 and an air outlet. The air inlet 7 is used for introducing air into the interior of the cylinder body 9 and forming a swirling flow field. The bottom of the cylinder body 9 is connected to a discharge pipe 3, and the discharge pipe 3 is arranged vertically; the discharge chute 6 is connected to the bottom of the discharge pipe 3, and the included angle between the discharge chute 6 and the discharge pipe 3 is an obtuse angle; the air induction pipe 4 is connected between the discharge chute 6 and the cylinder body 9, and the air induction pipe 4 extends into the interior of the cylinder body 9 for a certain distance. A balance pipe 5 is connected between the air induction pipe 4 and the discharge pipe 3. The air induction pipe 4 is respectively communicated with the discharge chute 6, the cylinder body 9 and the balance pipe 5 to return the air entering the discharge pipe 3 to the cylinder body 9 through the air induction pipe 4; the wind guiding mechanism is arranged inside the cylinder body 9 and there is a space for the swirling flow field and the material to pass between the wind guiding mechanism and the inner wall of the cylinder body 9. The wind guiding mechanism cooperates with the air outlet to guide the return air of the air induction pipe 4 to the air outlet through the wind guiding mechanism and discharge it from the cylinder body 9.

[0027] In the embodiment of the present invention, by providing a discharge chute 6, an air draft pipe 4, a balance pipe 5 and a wind guiding mechanism, the air draft pipe 4 and the balance pipe 5 balance the air pressure, and guide the return air to enter the air draft pipe 4 through the balance pipe 5, and rise along the air draft pipe 4 and return to the cylinder body 9, and then discharge the return air returning to the cylinder body 9 through the wind guiding mechanism, which can ensure the free fall of the material, reduce the interference of the return air on the sedimentation of the material, realize continuous and stable discharging, keep the gas-solid separation efficiency above 80%, and ensure the normal operation of the system. In addition, by providing the balance pipe 5, the air pressure fluctuation can also be eliminated, and the falling speed of the material can be stabilized at about 1 m / s. By providing the inclined discharge chute 6, it is convenient for the material to be separated from the return air.

[0028] In the embodiment of the present invention, by canceling the setting of the discharge valve, the discharge chute 6 is directly connected to a sealed bin, a conveying device or other process equipment, realizing a continuous material flow, and at the same time avoiding problems such as blockage of the material at the discharge valve and failure of the discharge valve in a high-temperature environment, and reducing the maintenance cost.

[0029] The continuous feeding cyclone cylinder of the embodiment of the present invention is applicable to industrial dust separation, material recovery and waste heat utilization.

[0030] In some embodiments, the wind guiding mechanism includes a wind guiding conical cylinder 1 and a wind guiding pipe 2. The wind guiding conical cylinder 1 has an open end and a reduced end along the axial direction. The open end of the wind guiding conical cylinder 1 faces downward, and the reduced end of the wind guiding conical cylinder 1 faces the air outlet. The wind guiding pipe 2 is arranged in the vertical direction, and the wind guiding pipe 2 is fixedly connected to the reduced end of the wind guiding conical cylinder 1. The wind guiding pipe 2 is located directly below the air outlet.

[0031] By arranging an inverted wind guiding conical cylinder 1 in the inner cavity of the cylinder body 9, the directional drainage of the return air is realized, and the return air can be directly introduced into the inner cylinder 8 and discharged, avoiding interfering with the rotational flow field of the cylinder body 9.

[0032] In some embodiments, the wind guiding mechanism is fixedly connected to the inside of the cylinder body 9.

[0033] Furthermore, according to the actual use requirements, the height of the wind guiding mechanism in the cylinder body 9 is set during the device design stage to ensure that there is sufficient space between the wind guiding mechanism and the inner wall of the cylinder body 9 to allow the swirling flow field and the material to pass through.

[0034] In some embodiments, an inner cylinder 8 is fixedly connected at the air outlet. There is a gap in the vertical direction between the inner cylinder 8 and the wind guiding pipe 2. The ratio of the inner diameter of the wind guiding pipe 2 to the inner diameter of the inner cylinder 8 is 0.1 - 0.3:1. This can discharge all the return air out of the cylinder body 9 and avoid the return air returning to the cylinder body 9 and interfering with the rotational flow field of the cylinder body 9.

[0035] In some embodiments, the inner cylinder 8, the wind guiding pipe 2, the wind guiding conical cylinder 1, the cylinder body 9 and the discharge pipe 3 are coaxially arranged.

[0036] In some embodiments, the discharge pipe 3 and the induced draft pipe 4 are arranged in parallel.

[0037] In some embodiments, the balance pipe 5 slopes upward in the direction towards the induced draft pipe 4, and the end of the balance pipe 5 connected to the induced draft pipe 4 is higher than the end connected to the discharge pipe 3. This facilitates the separation of the material from the return air. It should be noted that this is because the material moves downward due to its own weight, while the return air naturally moves upward. Therefore, the end of the balance pipe 5 facing the induced draft pipe 4 is arranged to slope upward.

[0038] In some embodiments, a plurality of balance pipes 5 are provided and are parallel to each other. This can further eliminate air pressure fluctuations and ensure a stable falling speed of the material.

[0039] Furthermore, the number of balance pipes 5 is greater than or equal to 3.

[0040] In some embodiments, the cylinder body 9 includes a straight cylinder section 91 and a conical cylinder section 92. The conical cylinder section 92 is connected below the straight cylinder section 91. The conical cylinder section 92 has an open end and a reduced end along the axial direction. The induced draft pipe 4 extends into the interior of the conical cylinder section 92 for a certain distance. The open end of the air guiding conical cylinder 1 is located inside the conical cylinder section 92, and the reduced end of the air guiding conical cylinder 1 is located inside the straight cylinder section 91. The air inlet 7 is located at the top of the side wall of the straight cylinder section 91.

[0041] Furthermore, the length of the induced draft pipe 4 extending into the interior of the conical cylinder section 92 is adjusted according to the amount of material.

[0042] In some embodiments, the ratio of the inner diameter of the balance pipe 5 to the inner diameter of the discharge pipe 3 is 0.1 - 0.3:1, and the ratio of the inner diameter of the induced draft pipe 4 to the inner diameter of the discharge pipe 3 is 0.1 - 0.3:1.

[0043] The present invention will be further described below through specific embodiments.

[0044] Embodiment 1

[0045] A separation cyclone for calcined kaolin finished products, with a flue gas volume of 5000 Nm 3 / h and a flue gas temperature of 1300 °C, adopting a continuous feeding cyclone structure.

[0046] Structural parameters: The inner diameter of the straight cylinder section 91 of the cylinder body 9 is 2200 mm, the cone angle of the air guiding conical cylinder 1 is 60°, the inner diameter of the air guiding pipe 2 is 440 mm, the inner diameter of the inner cylinder 8 is 1100 mm, the height of the air inlet is 900 mm, the width is 450 mm, the inner diameter of the discharge pipe 3 is 550 mm, 4 balance pipes 5 are provided, with an inner diameter of 60 mm, and the material is stainless steel.

[0047] Operating data: Inlet air velocity: 20 m / s; Process air volume: 28800 m 3 / h; Separation efficiency: >80% (particle size > 10 μm); Discharge continuity: no blockage, material flow fluctuation < 5%.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous feeding cyclone, characterized in that: include: A cylinder, wherein the upper portion of the cylinder has an air inlet and an air outlet, wherein the air inlet is used to introduce air into the interior of the cylinder and form a cyclone flow field, and the bottom of the cylinder is connected to a discharge pipe, wherein the discharge pipe is arranged in a vertical direction; A discharge chute, the discharge chute is connected to the bottom of the discharge pipe, and the angle between the discharge chute and the discharge pipe is an obtuse angle; An induced air pipe, the induced air pipe is connected between the discharge chute and the cylinder, the induced air pipe extends into the cylinder for a certain distance, a balance pipe is connected between the induced air pipe and the discharge pipe, and the induced air pipe is respectively connected with the discharge chute, the cylinder and the balance pipe, so as to return the air entering the discharge pipe to the cylinder through the induced air pipe; An air guiding mechanism is arranged inside the cylinder and leaves a space for a cyclone flow field and materials to pass through between the air guiding mechanism and the inner wall of the cylinder. The air guiding mechanism cooperates with the exhaust port to guide the return air of the air duct to the exhaust port through the air guiding mechanism and discharge it from the cylinder.

2. The continuous feeding cyclone according to claim 1, characterized in that: The air guide mechanism includes an air guide cone and an air guide pipe. The air guide cone has an open end and a narrowed end along the axial direction. The open end of the air guide cone faces downward, and the narrowed end of the air guide cone faces the exhaust port. The air guide pipe is arranged in a vertical direction, and the air guide pipe is fixedly connected to the narrowed end of the air guide cone. The air guide pipe is located directly below the exhaust port.

3. The continuous feeding cyclone according to claim 2, characterized in that: The air guide mechanism is fixedly connected to the interior of the cylinder.

4. The continuous feeding cyclone according to claim 2, characterized in that: An inner cylinder is fixedly connected to the air outlet, a gap is left between the inner cylinder and the air guide pipe in the vertical direction, and the ratio of the inner diameter of the air guide pipe to the inner diameter of the inner cylinder is 0.1-0.3:

1.

5. The continuous feeding cyclone according to claim 4, characterized in that: The inner cylinder, the air guide pipe, the air guide cone, the cylinder body and the discharge pipe are coaxially arranged.

6. The continuous feeding cyclone according to claim 1, characterized in that: The discharge pipe is arranged in parallel with the air duct.

7. The continuous feeding cyclone according to claim 1, characterized in that: The balance pipe is inclined upward toward the air induced pipe.

8. The continuous feeding cyclone according to claim 1, characterized in that: There are a plurality of balancing pipes which are parallel to each other.

9. The continuous feeding cyclone according to claim 2, characterized in that: The cylinder body includes a straight cylinder section and a conical cylinder section, the conical cylinder section is connected to the bottom of the straight cylinder section, the conical cylinder section has an opening and a narrowing along the axial direction, the air duct extends into the interior of the conical cylinder section for a certain distance, the opening of the air guide cone is located inside the conical cylinder section, the narrowing of the air guide cone is located inside the straight cylinder section, and the air inlet is located at the top of the side wall of the straight cylinder section.

10. The continuous feeding cyclone according to claim 5, characterized in that: The ratio of the inner diameter of the balance pipe to the inner diameter of the discharge pipe is 0.1-0.3:1, and the ratio of the inner diameter of the induced draft pipe to the inner diameter of the discharge pipe is 0.1-0.3:1.

Images