A rotary kiln grading discharging mechanism

Abstract

The present invention proposes a rotary kiln graded discharging mechanism, comprising a rotary kiln cylinder, a spiral conveying pipe, a first screen, a first scoop net, a first discharging port and a second discharging port, wherein the first screen is fixedly arranged on the inner wall of the rotary kiln cylinder; the spiral conveying pipe is arranged in the rotary kiln cylinder, the first end of which passes through the first screen and communicates with the first scoop net, and the second end of which communicates with the first discharging port; the first scoop net is arranged on a side of the first screen away from the kiln tail; the first discharging port and the second discharging port are both arranged at the kiln tail of the rotary kiln cylinder, and the second discharging port is communicated with the rotary kiln cylinder. Through the above arrangement, materials with a smaller aperture than the first screen are conveyed to the second discharging port through the rotary kiln cylinder after passing through the first screen for discharging, and materials with a larger aperture than the first screen are scooped into the spiral conveying pipe through the first scoop net and conveyed to the first discharging port through the spiral conveying pipe for discharging, thereby realizing graded discharging of materials with different particle sizes of the rotary kiln.

Description

Technical Field

[0001] The invention relates to the technical field of industrial kilns, and in particular to a rotary kiln grading discharging mechanism. Background Art

[0002] Rotary kilns are widely used in various industries. For example, in many production industries such as building materials, metallurgy, chemical industry, and environmental protection, rotary kilns are used to perform mechanical, physical or chemical treatment on solid materials. At present, the discharge of rotary kilns is unified and centralized, and the particle size of the materials is not distinguished. This makes the materials very mixed during discharge, which causes great difficulties for the sealing and transportation of the discharge end. Because the discharge composition is more mixed, it is easy to cause the discharge screw to stagnate, affecting the overall operation of the rotary kiln. Due to the complex composition of the unified discharge, it brings great difficulty to the subsequent material sorting, and also greatly increases the cost investment.

[0003] In summary, how to provide a rotary kiln graded discharging mechanism that can achieve multi-stage discharging and smooth discharging has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the problem to be solved by the present invention is how to provide a rotary kiln classification discharging mechanism to solve the technical problems of the existing rotary kiln discharging material having complex composition, and the subsequent material sorting being difficult and costly.

[0005] To solve one of the above problems, the present invention proposes a rotary kiln graded discharging mechanism, comprising a rotary kiln cylinder, a spiral conveying pipe, a first screen, a first scooping net, a first discharging port and a second discharging port, wherein the first screen is fixedly arranged on the inner wall of the rotary kiln cylinder; the spiral conveying pipe is arranged in the rotary kiln cylinder, a first end of the spiral conveying pipe passes through the first screen and communicates with the first scooping net, and a second end of the spiral conveying pipe is communicated with the first discharging port; the first scooping net is arranged on a side of the first screen away from the kiln tail; the first discharging port and the second discharging port are both arranged at the kiln tail of the rotary kiln cylinder, and the second discharging port is communicated with the rotary kiln cylinder.

[0006] Preferably, a notch is provided at the bottom of the first end of the spiral conveying tube, and the first scoop net is arranged below the notch and communicates with the spiral conveying tube through the notch.

[0007] Preferably, the end surface of the first scoop net in contact with the spiral conveying pipe is open, and a plurality of mesh holes are distributed on the first scoop net.

[0008] Preferably, the aperture of the first sieve is smaller than or equal to the aperture of the first scoop net.

[0009] Preferably, the spiral conveying pipe is arranged at a central position in the rotary kiln cylinder along the axial direction of the rotary kiln cylinder; and / or the first screen is arranged along the radial direction of the rotary kiln cylinder.

[0010] Preferably, the rotary kiln classification discharging mechanism of the present invention further comprises a tail cover arranged at the tail of the spiral conveying tube kiln, and the first discharging port and the second discharging port are arranged in parallel at the bottom of the tail cover.

[0011] Preferably, a rotary kiln grading discharging mechanism of the present invention further includes a second screen, a second scoop net and a third discharging port, wherein the second screen is arranged between the first screen and the kiln tail, and the spiral conveying pipe is arranged through the second screen; the spiral conveying pipe includes a first-layer pipe and a second-layer pipe sleeved in the first-layer pipe, the first scoop net is communicated with the first-layer pipe, and the second scoop net is communicated with the second-layer pipe; the third discharging port is arranged at the kiln tail of the rotary kiln cylinder, the first discharging port is communicated with the first-layer pipe, and the third discharging port is communicated with the second-layer pipe.

[0012] Preferably, the first end of the first scoop net is connected to the first layer of pipeline, and the second end thereof is arranged on the inner wall of the rotary kiln cylinder;

[0013] And / or, the first end of the second scoop net is connected to the second layer of pipeline, and the second end thereof is arranged on the inner wall of the rotary kiln cylinder.

[0014] Preferably, the aperture of the second sieve is smaller than the aperture of the first sieve.

[0015] Preferably, the spiral conveying pipe is installed inside the rotary kiln cylinder through a support, one end of the support is connected to the inner wall of the rotary kiln cylinder, and the other end of the support is connected to the outer tube wall of the spiral conveying pipe.

[0016] Preferably, a plurality of through holes are arranged on the tube wall of the first end of the spiral conveying tube.

[0017] The rotary kiln graded discharging mechanism of the above structure comprises a rotary kiln cylinder, a spiral conveying pipe, a first screen, a first scoop net, a first discharging port and a second discharging port, wherein the first screen is fixedly arranged on the inner wall of the rotary kiln cylinder; the spiral conveying pipe is arranged in the rotary kiln cylinder, a first end of the spiral conveying pipe passes through the first screen and communicates with the first scoop net, and a second end of the spiral conveying pipe is communicated with the first discharging port; the first scoop net is arranged on a side of the first screen away from the kiln tail; the first discharging port and the second discharging port are both arranged at the kiln tail of the rotary kiln cylinder, and the second discharging port is communicated with the rotary kiln cylinder. Through the above arrangement, the material in the rotary kiln cylinder is screened by the first screen, and the material with a smaller aperture than the first screen is conveyed to the second discharge port through the rotary kiln cylinder after passing through the first screen, and the material with a larger aperture than the first screen is scooped into the spiral conveying pipe through the first scooping net and conveyed to the first discharge port through the spiral conveying pipe for discharge, thereby realizing the graded discharge of materials with different particle sizes of the rotary kiln, reducing the subsequent processing cost, alleviating the difficulty of discharge, and improving the overall reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a rotary kiln classification discharging mechanism of the present invention;

[0020] Figure 2 The present invention is a simplified structural diagram of an embodiment of a rotary kiln classification discharging mechanism.

[0021] The corresponding relationship of the reference numerals is:

[0022] 1 Rotary kiln shell

[0023] 2. First sieve

[0024] 3 Tail hood

[0025] 4 Tugboat

[0026] 5. First Scoop Net

[0027] 6 Spiral conveyor pipe

[0028] 7 Support

[0029] 8. First outlet

[0030] 9 Second outlet DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In the description of the present invention, the terms "axial", "radial", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0033] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0034] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a rotary kiln graded discharging mechanism, comprising a rotary kiln cylinder 1, a spiral conveying pipe 6, a first screen 2, a first scoop net 5, a first discharging port 8 and a second discharging port 9, wherein the first screen 2 is fixedly arranged on the inner wall of the rotary kiln cylinder 1 for screening materials, specifically, the first screen 2 is arranged along the radial direction of the rotary kiln cylinder 1; the spiral conveying pipe 6 is arranged in the rotary kiln cylinder 1, specifically, the spiral conveying pipe 6 is arranged at the central position in the rotary kiln cylinder 1 along the axial direction of the rotary kiln cylinder 1, the left end of which passes through the first screen 2 and communicates with the first scoop net 5, and the right end of which communicates with the first discharging port 8; the first scoop net 5 is arranged on the left side of the first screen 2, the upper end of which is connected to the spiral conveying pipe 6, and the lower end of which is arranged on the inner wall of the rotary kiln cylinder 1; the first discharging port 8 and the second discharging port 9 are both arranged at the kiln tail of the rotary kiln cylinder 1, and the second discharging port 9 is communicated with the rotary kiln cylinder 1. Through the above arrangement, the material in the rotary kiln cylinder 1 is screened by the first screen 2, and the material with a smaller screen hole diameter than the first screen 2 is conveyed to the second discharge port 9 through the rotary kiln cylinder 1 for discharge after passing through the first screen 2, and the material with a larger screen hole diameter than the first screen 2 is scooped into the spiral conveying pipe 6 through the first scooping net 5, and is conveyed to the first discharge port 8 through the spiral conveying pipe 6 for discharge, thereby realizing the graded discharge of materials with different particle sizes of the rotary kiln, reducing the subsequent processing cost, alleviating the difficulty of discharge, and improving the overall reliability of the equipment.

[0035] Furthermore, a notch is provided at the bottom of the left end of the spiral conveying tube 6, and the first scoop net 5 is arranged below the notch and communicates with the spiral conveying tube 6 through the notch; and the end surface of the first scoop net 5 in contact with the spiral conveying tube 6 is open, and a plurality of mesh holes are distributed on the first scoop net 5, and materials larger than the aperture of the first screen 2 enter the first scoop net 5 through the aforementioned plurality of mesh holes, and then pass through the spiral conveying tube 6, and finally are discharged through the first discharge port 8.

[0036] In order to better achieve multi-stage separation of materials in the rotary kiln cylinder 1, the aperture of the first screen 2 is preferably smaller than the aperture of the first scoop net 5. It should be noted that the aperture of the first screen 2 can also be equal to the aperture of the first scoop net 5.

[0037] At the same time, if Figure 2 As shown, the rotary kiln classification discharging mechanism in the present invention further includes a tail cover 3, a support member 7 and a tug 4. The tail cover 3 is arranged at the kiln tail of the rotary kiln cylinder 1, and the first discharging port 8 and the second discharging port 9 are arranged in parallel at the bottom of the tail cover 3; the support member 7 is arranged inside the rotary kiln cylinder 1, and is used to support the spiral conveying pipe 6, and its upper end is connected to the inner wall of the rotary kiln cylinder 1, and its lower end is connected to the outer pipe wall of the spiral conveying pipe 6; the tug 4 is arranged at the bottom of the rotary kiln cylinder 1. It should be noted that there are multiple tugs 4, and tugs are respectively arranged at both ends of the bottom of the rotary kiln cylinder 1.

[0038] In addition, it is worth mentioning that in order to better achieve the complete separation of materials of different particle sizes, a plurality of through holes are provided on the tube wall at the left end of the spiral conveying tube 6, and small particles of materials enter the rotary kiln cylinder 1 through the aforementioned plurality of through holes and are finally discharged from the second discharge port 9.

[0039] The specific working principle of the rotary kiln classification discharging mechanism of the present invention is as follows: solid waste enters the rotary kiln for pyrolysis, and the material after pyrolysis is first screened through the first screen 2, and the material smaller than the mesh size of the first screen 2 is transported through the rotary kiln cylinder 1 to the second discharge port 9 of the tail cover 3 for discharging after passing through the first screen 2; the material larger than the mesh size of the second screen 2 is scooped into the spiral conveying pipe 6 through a plurality of meshes arranged on the first scooping net 5, and then through the notch provided at the bottom of the left end of the spiral conveying pipe 6, and is transported to the second discharge port 9 of the tail cover through the spiral conveying pipe 6 for discharging, thereby realizing the two-stage discharging of materials with different particle sizes of the rotary kiln.

[0040] In a further technical solution, in order to realize the three-level discharging of materials with different particle sizes of the rotary kiln, the rotary kiln graded discharging mechanism also includes a second screen, a second scoop net and a third discharging port. The second screen is arranged between the first screen 2 and the kiln tail, and the spiral conveying pipe 6 is arranged through the second screen; the spiral conveying pipe includes a first layer of pipeline and a second layer of pipeline sleeved in the first layer of pipeline, the first scoop net 5 is connected to the first layer of pipeline, specifically, the upper end of the first scoop net 5 is connected to the first layer of pipeline, and its lower end is arranged on the inner wall of the rotary kiln cylinder 1; the second scoop net is connected to the second layer of pipeline, specifically, the upper end of the second scoop net is connected to the second layer of pipeline, and its lower end is arranged on the inner wall of the rotary kiln cylinder 1; the third discharging port is arranged at the kiln tail of the rotary kiln cylinder, the first discharging port 8 is connected to the first layer of pipeline, and the third discharging port is connected to the second layer of pipeline. Preferably, the aperture of the second screen is smaller than the aperture of the first screen 5. Through the above arrangement, the material in the rotary kiln cylinder 1 is first screened by the first screen 2: the material smaller than the aperture of the first screen 2 is transported to the second screen through the rotary kiln cylinder 1 for screening after passing through the first screen 2, and the material larger than the aperture of the first screen 2 is scooped into the first layer of the spiral conveying pipe 6 through the first scooping net 5, and is transported to the first discharge port 8 through the first layer of the pipeline for discharge; secondly, the material is screened by the second screen: the aforementioned material smaller than the aperture of the first screen 2 passes through the second screen, the material smaller than the aperture of the second screen is transported to the second discharge port 9 through the rotary kiln cylinder 1 through the second screen for discharge, and the material larger than the aperture of the second screen is scooped into the second layer of the spiral conveying pipe 6 through the second scooping net, and is transported to the third discharge port for discharge through the second layer of the pipeline, thereby realizing the three-level discharge of materials with different particle sizes of the rotary kiln.

[0041] It should be noted that if the present invention wants to achieve four-level, five-level or even more-level discharging, it is only necessary to set a screen smaller than the aperture of the second screen, a scoop net and more layers of spiral conveying pipes behind the second screen to achieve multi-level discharging. The setting method is similar to the setting method of three-level material discharging, which will not be elaborated here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary kiln discharging mechanism, characterized in that: The rotary kiln comprises a rotary kiln body (1), a spiral conveying pipe (6), a first screen (2), a first scoop net (5), a first discharge port (8), a second discharge port (9), a second screen, a second scoop net and a third discharge port, wherein the first screen (2) is fixedly arranged on the inner wall of the rotary kiln cylinder (1); the spiral conveying pipe (6) is arranged in the rotary kiln cylinder (1), the first end of which passes through the first screen (2) and communicates with the first scoop net (5), and the second end of which communicates with the first discharge port (8); the first scoop net (5) is arranged on a side of the first screen (2) away from the kiln tail; the spiral conveying pipe (6) is arranged at a central position in the rotary kiln cylinder (1) along the axial direction of the rotary kiln cylinder (1); and / or the first screen (2) is arranged along the radial direction of the rotary kiln cylinder (1); the first discharge port (8) and the second discharge port (9) are both arranged at the kiln tail of the rotary kiln cylinder (1), and the second discharge port (9) is communicated with the rotary kiln cylinder (1); The second screen is arranged between the first screen and the kiln tail, and the spiral conveying pipe (6) is arranged through the second screen; the spiral conveying pipe (6) comprises a first layer of pipe and a second layer of pipe sleeved in the first layer of pipe, the first scoop net (5) is in communication with the first layer of pipe, and the second scoop net is in communication with the second layer of pipe; the third discharge port is arranged at the kiln tail of the rotary kiln cylinder (1), the first discharge port (8) is in communication with the first layer of pipe, and the third discharge port is in communication with the second layer of pipe; The first end of the first scoop net (5) is connected to the first layer of pipes, and the second end thereof is arranged on the inner wall of the rotary kiln cylinder (1); and / or the first end of the second scoop net is connected to the second layer of pipes, and the second end thereof is arranged on the inner wall of the rotary kiln cylinder (1); The aperture of the second sieve is smaller than the aperture of the first sieve (2).

2. The rotary kiln classification discharging mechanism according to claim 1, characterized in that: A notch is provided at the bottom of the first end of the spiral conveying pipe (6); the first scoop net (5) is arranged below the notch and communicates with the spiral conveying pipe (6) through the notch.

3. The rotary kiln classification discharging mechanism according to claim 2, characterized in that: The end surface of the first scoop net (5) in contact with the spiral conveying pipe (6) is open, and a plurality of mesh holes are distributed on the first scoop net (5).

4. The rotary kiln classification discharging mechanism according to claim 1, characterized in that: The aperture of the first screen (2) is smaller than or equal to the aperture of the first scoop net (5).

5. The rotary kiln classification discharging mechanism according to claim 1, characterized in that: It also comprises a tail cover (3) arranged at the kiln tail of the spiral conveying pipe (6), and a first discharge port (8) and a second discharge port (9) are arranged in parallel at the bottom of the tail cover (3).

6. The rotary kiln classification discharging mechanism according to claim 1, characterized in that: The spiral conveying pipe (6) is installed inside the rotary kiln cylinder (1) through a support member (7); one end of the support member (7) is connected to the inner wall of the rotary kiln cylinder (1), and the other end is connected to the outer tube wall of the spiral conveying pipe (6).

7. The rotary kiln classification discharging mechanism according to claim 1, characterized in that: A plurality of through holes are arranged on the tube wall of the first end of the spiral conveying tube (6).

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