Cold and hot air flow mixing device for coal mill interface

Abstract

The utility model provides a cold and hot air mixing device for a coal mill interface, and belongs to the technical field of cold and hot air mixing devices. Comprising a hot air pipeline which comprises an air inlet and an air outlet; the cold air pipeline is located above the hot air pipeline and is arranged to be communicated with the interior of the hot air pipeline so that cold air can be conveyed into the hot air pipeline; the turbulent flow part is located in the hot air pipeline and used for enabling fluid in the hot air pipeline to flow in the fold line direction so as to increase the turbulent flow degree of air, and the turbulent flow part is arranged at the intersection of the hot air pipeline and the cold air pipeline so that the cold air and the hot air can pass through the turbulent flow part after being mixed in the hot air pipeline; and a throttle pipe. The turbulent flow part is arranged, so that fluid in the hot air pipeline flows in the broken line direction, the turbulent flow degree of air is increased, full mixing of cold air and hot air is promoted, the contact area and the contact time between the cold air and the hot air are further increased and prolonged through the design of the multiple sets of turbulent flow plates and hole grooves, and mixing is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold -hot air mixing device technical field, especially interface coal mill cold -hot air mixed flow device of a kind of. BACKGROUND

[0002] In industrial production, coal mill is one of important equipment, and its normal operation is crucial to improve production efficiency and ensure product quality. The operation of coal mill usually needs wind of specific temperature to work, which involves the mixing of cold and hot air.

[0003] In the prior art, the mixing of cold and hot air at the interface of coal mill often has some deficiencies. On the one hand, the traditional mixing method may not fully realize the uniform mixing of cold and hot air, resulting in unstable wind temperature entering the coal mill, affecting the working efficiency and product quality of the coal mill. On the other hand, there is a lack of effective control means to adjust the mixing process, which cannot dynamically adjust the degree and speed of mixing according to actual conditions, and cannot adapt to different working conditions and requirements. Therefore, the present application provides a coal mill interface cold and hot air mixing device to meet the needs. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a coal mill interface cold and hot air mixing device to solve the problem that the mixing of cold and hot air at the interface of the existing coal mill often has some deficiencies. On the one hand, the traditional mixing method may not fully realize the uniform mixing of cold and hot air, resulting in unstable wind temperature entering the coal mill, affecting the working efficiency and product quality of the coal mill. On the other hand, there is a lack of effective control means to adjust the mixing process, which cannot dynamically adjust the degree and speed of mixing according to actual conditions, and cannot adapt to different working conditions and requirements.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a coal mill interface cold and hot air mixing device, comprising: a hot air pipeline, the hot air pipeline comprising an air inlet and an air outlet; a cold air pipeline located above the hot air pipeline and arranged to communicate with the inside of the hot air pipeline to convey cold air into the hot air pipeline; a turbulence part located in the hot air pipeline for the fluid in the hot air pipeline to flow along the broken line direction to increase the turbulence degree of the wind, and arranged at the intersection of the hot air pipeline and the cold air pipeline so that the cold air and the hot air are mixed in the hot air pipeline and then pass through the turbulence part; a throttle pipe installed on one side of the air outlet of the hot air pipeline to reduce the flow of the mixed fluid to increase the mixing time of the cold air and the hot air.

[0006] Preferably, the turbulence part comprises: a plurality of turbulence plates installed on both sides of the inner wall of the hot air pipeline to generate turbulence and vortex in the passing fluid, increasing the contact area and contact time between cold and hot air; a plurality of hole grooves opened on the turbulence plate to promote fluid mixing.

[0007] Preferably, the turbulence part further comprises: a rotating shaft installed on one side of the group of turbulence plates close to the other group of turbulence plates; a first baffle plate installed on the rotating shaft for closing or opening the hole slot and arranged to open the hole slot when the fluid flows to the throttle pipe and close the hole slot when the fluid is bounced back from the throttle pipe; and a second baffle plate installed on the rotating shaft and symmetrically arranged with the first baffle plate about the central axis of the rotating shaft for closing the gap between the two groups of turbulence plates when the fluid flows back.

[0008] Preferably, the multiple groups of turbulence plates are arranged in staggered positions to increase the flow of the fluid.

[0009] Preferably, the utility model further comprises: a mixing fan installed in the throttle pipe for stirring and mixing the fluid and arranged to rotate under the fluid transportation.

[0010] Preferably, the utility model further comprises: a conveying pipe installed on one side of the throttle pipe for conveying the mixed gas passing through the throttle pipe to the coal mill.

[0011] Preferably, the mixing fan comprises: a rotating shaft installed in the throttle pipe; and multiple groups of fan blades uniformly installed on the rotating shaft for stirring and mixing the fluid.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects: 1. In the above scheme, the fluid in the hot air pipe flows along the broken line direction by arranging the turbulence part, the turbulence degree of the air is increased, the mixing of the cold air and the hot air is promoted, the design of the multiple groups of turbulence plates and the hole slot further increases the contact area and the contact time between the cold air and the hot air, the mixing is more uniform, the mixing fan is installed in the throttle pipe and can rotate under the fluid transportation, the mixed fluid is stirred, and the mixing effect is further improved.

[0013] 2. The first baffle plate and the second baffle plate are arranged to automatically adjust the opening and closing of the hole slot and the gap between the turbulence plates according to the flow direction of the fluid, the dynamic control of the mixing process is realized, the first baffle plate opens the hole slot when the fluid flows to the throttle pipe, the mixing effect is increased, the first baffle plate closes the hole slot when the fluid is bounced back from the throttle pipe, the backflow of the fluid is prevented, and the second baffle plate closes the gap between the two groups of turbulence plates when the fluid flows back, the interference of the backflow on the mixing process is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings constituting part of the specification herein show embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and to enable a person skilled in the relevant art to implement and use the present disclosure.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the interior of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the spoiler in the utility model.

[0018] [reference numerals]

[0019] 1. Hot air duct; 2. Cold air duct; 3. Throttle tube; 4. Spoiler; 5. Hole slot; 6. Rotating shaft; 7. First baffle; 8. Second baffle; 9. Mixing fan; 10. Delivery duct; 11. Rotating shaft; 12. Fan blades.

[0020] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0021] The following describes in detail a coal mill interface hot and cold air mixed flow device provided by the present invention, in conjunction with the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative implementations for some known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0022] Example 1: Figures 1 to 3 As shown, an embodiment of the present invention provides a hot and cold air mixing device for a coal mill interface, comprising: a hot air duct 1, the hot air duct 1 comprising an air inlet and an air outlet; a cold air duct 2, located above the hot air duct 1, and configured to be connected to the inside of the hot air duct 1 so that the cold air is transported into the hot air duct 1; a spoiler, located in the hot air duct 1, used for the fluid in the hot air duct 1 to flow along a broken line direction to increase the turbulence of the wind, and is configured at the intersection of the hot air duct 1 and the cold air duct 2, so that the cold air and the hot air are mixed in the hot air duct 1 and then pass through the spoiler; a throttle tube 3, installed on one side of the air outlet of the hot air duct 1, used to reduce the flow rate of the mixed fluid to increase the mixing time of the cold air and the hot air.

[0023] like Figures 2 to 3 As shown, the spoiler includes: multiple groups of spoilers 4, which are respectively installed on both sides of the inner wall of the hot air duct 1, for causing turbulence and eddy currents in the passing fluid, thereby increasing the contact area and contact time between the cold and hot air; and several groups of holes 5, which are opened on the spoiler 4, for promoting fluid mixing.

[0024] As Figures 2 to 3 shown, the spoiler also includes: rotating shaft 6, installed in a group of spoiler 4 near the other side of the spoiler 4; first baffle 7, installed on the rotating shaft 6, for closing or opening hole slot 5, and is provided when the fluid flow to the throttle pipe 3, the first baffle 7 opens the hole slot 5, when the fluid is bounced back from the throttle pipe 3, close the hole slot 5; second baffle 8, installed on the rotating shaft 6, and symmetrically arranged with the first baffle 7 about the center axis of the rotating shaft 6, for closing the gap between the two groups of spoiler 4 when the fluid backflow.

[0025] As Figure 2 shown, the multiple groups of spoiler 4 are staggered to increase the flow of fluid.

[0026] Example two: as Figure 2 shown, also includes: mixed fan 9, installed in the throttle pipe 3, for stirring mixed fluid, and is provided to rotate under the fluid transport.

[0027] As Figures 1 to 2 shown, also includes: conveying pipe 10, installed on one side of the throttle pipe 3, for conveying the mixed gas through the throttle pipe 3 to the coal mill.

[0028] As Figure 2 shown, the mixed fan 9 includes: rotating shaft 11, installed in the throttle pipe 3; multiple groups of fan blades 12, uniformly installed on the rotating shaft 11, for stirring mixed fluid.

[0029] The technical scheme provided by the utility model, comprising the following steps: one, cold and hot air input stage: hot air enters the hot air pipeline 1 through the air inlet of the hot air pipeline 1, at the same time, cold air is transported to the hot air pipeline 1 through the cold air pipeline 2 located above the hot air pipeline 1 and communicated with the inside of the hot air pipeline 1, at this time, at the intersection of the hot air pipeline 1 and the cold air pipeline 2, cold and hot air begins to mix initially.

[0030] Two, turbulence mixing stage: the spoiler in the hot air pipeline 1 begins to play a role, the multiple groups of spoiler 4 in the spoiler are installed on the inner wall of the hot air pipeline 1 two sides, so that the fluid flows along the broken line direction, thereby increasing the turbulence degree of wind, this process makes the mixing of cold and hot air more sufficient, also increases the contact area and contact time between cold and hot air, the several groups of hole slots 5 opened on the spoiler 4 further promote the mixing of fluid; when the cold and hot air passes through these hole slots 5, local turbulence and vortex will be generated, further enhancing the mixing effect.

[0031] Three, dynamic control phase: the spoiler also includes rotating shaft 6, first baffle 7 and second baffle 8, when the fluid flows to the throttle pipe 3, the first baffle 7 opens the hole slot 5 under the push of the fluid, increasing the mixing effect of the cold and hot air. At the same time, the second baffle 8 is in the open state, which does not affect the fluid flow. When the fluid is bounced back from the throttle pipe 3, the first baffle 7 closes the hole slot 5 to prevent the backflow of the fluid, and at this time, the second baffle 8 closes the gap between the two groups of spoiler 4 under the action of the backflow of the fluid, avoiding the interference of the backflow to the mixing process.

[0032] Four, throttling and stirring stage: the throttle pipe 3 installed on one side of the hot air duct 1 outlet plays a role in reducing the flow of the mixed fluid, thereby increasing the mixing time of the cold air and the hot air. The mixed fan 9 in the throttle pipe 3 rotates under the fluid conveying. The mixed fan 9 is composed of a rotating shaft 11 and a plurality of fan blades 12 evenly installed on the rotating shaft 11, which stirs the mixed fluid and further improves the mixing effect.

[0033] Five, conveying stage: the mixed gas after mixing and stirring through the throttle pipe 3 is conveyed to the coal mill through the conveying pipe 10 installed on one side of the throttle pipe 3 to provide the required specific temperature air for the normal operation of the coal mill.

[0034] The utility model covers any alternative, modification, equivalent method and scheme which is made on the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known method, process, flow, element and circuit are not explained in detail.

[0035] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection range of the utility model.

Claims

1. A coal mill interface hot and cold air mixed flow device, characterized in that: include: A hot air duct (1), the hot air duct (1) comprising an air inlet and an air outlet; A cold air duct (2) is located above the hot air duct (1) and is arranged to communicate with the interior of the hot air duct (1) so that the cold air is transported into the hot air duct (1); The spoiler is located in the hot air duct (1) and is used to cause the fluid in the hot air duct (1) to flow in a broken line direction to increase the turbulence of the wind. The spoiler is located at the intersection of the hot air duct (1) and the cold air duct (2) so that the cold air and the hot air are mixed in the hot air duct (1) and then pass through the spoiler. The throttle tube (3) is installed on one side of the air outlet of the hot air duct (1) and is used to reduce the flow rate of the mixed fluid to increase the mixing time of the cold air and the hot air.

2. The coal mill interface cold and hot air mixed flow device according to claim 1, characterized in that: The spoiler comprises: A plurality of spoiler plates (4) are respectively installed on both sides of the inner wall of the hot air duct (1) to generate turbulence and eddy currents in the fluid passing through, thereby increasing the contact area and contact time between the cold and hot air; A plurality of groups of holes (5) are provided on the spoiler (4) to promote fluid mixing.

3. The coal mill interface cold and hot air mixed flow device according to claim 2, characterized in that: The spoiler also includes: A rotating shaft (6) is mounted on a side of one set of spoilers (4) close to another set of spoilers (4); a first baffle (7) mounted on the rotating shaft (6) for closing or opening the aperture (5), and configured such that when the fluid flows toward the throttle tube (3), the first baffle (7) opens the aperture (5), and when the fluid rebounds from the throttle tube (3), the first baffle (7) closes the aperture (5); The second baffle (8) is mounted on the rotating shaft (6) and is symmetrically arranged with the first baffle (7) about the central axis of the rotating shaft (6), and is used to close the gap between the two groups of spoilers (4) when the fluid flows back.

4. The coal mill interface cold and hot air mixed flow device according to claim 2, characterized in that: The plurality of groups of spoilers (4) are staggeredly arranged to increase the flow rate of the fluid.

5. The coal mill interface cold and hot air mixed flow device according to claim 1, characterized in that: Also includes: The mixing fan (9) is installed in the throttle tube (3) for stirring the mixed fluid and is arranged to rotate under the fluid transportation.

6. The coal mill interface cold and hot air mixed flow device according to claim 1, characterized in that: Also includes: The delivery pipeline (10) is installed on one side of the throttle tube (3) and is used to deliver the mixed gas passing through the throttle tube (3) to the coal mill.

7. The coal mill interface cold and hot air mixed flow device according to claim 5, characterized in that: The mixing fan (9) comprises: A rotating shaft (11) is installed in the throttle tube (3); A plurality of groups of fan blades (12) are evenly mounted on the rotating shaft (11) and are used for stirring the mixed fluid.

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