Blanking cooling structure of rotary furnace

Abstract

The blanking cooling structure comprises a material collecting cavity, a blanking pipe, a valve and a cooling sleeve, the material collecting cavity is communicated with the discharging end of a furnace tube, the blanking pipe is communicated with the discharging end of the material collecting cavity, the valve is communicated with the discharging end of the blanking pipe, one end of the cooling sleeve is connected with the material collecting cavity in a sealed mode, and the other end of the cooling sleeve is connected with the furnace tube in a sealed mode. The discharging pipe is sleeved with the cooling sleeve, and a cooling gap is reserved between the cooling sleeve and the discharging pipe. The material cooling device has the advantages of simple structure, good material cooling effect and capabilities of protecting the furnace tube and reducing thermal power loss in the furnace tube.

Description

TECHNICAL FIELD

[0001] The utility model relates to material cooling technical field, concretely relates to a rotary furnace's unloading cooling structure. BACKGROUND

[0002] Rotary furnace is a kind of thermal equipment, material is burned at high temperature in hollow cylindrical furnace tube and flows into discharge cover at the end, and then flows into discharge pipe below the discharge cover, and the nature of part of material determines that it cannot contact outside air at high temperature, otherwise quality will be reduced due to oxidation, so cooling is needed under sealed condition.

[0003] The existing cooling method, such as Chinese patent CN221527281U, proposes a cooling mode for optimizing furnace tube structure, which cools the material after discharging into the discharge pipe, and the furnace tube itself bears the heat transferred by the heater, and cooling is carried out in the same furnace tube, which indirectly causes the loss of heating power due to heat conduction, and the change of crystal in furnace tube material will reduce the service life of furnace tube due to the large temperature change before and after furnace tube. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the deficiency of prior art, and provides a rotary furnace's unloading cooling structure which is simple in structure, good in material cooling effect, can protect furnace tube and reduce the heat power loss in furnace tube.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A rotary furnace's unloading cooling structure, comprising a material collecting cavity, a discharge pipe, a valve and a cooling sleeve, the material collecting cavity is communicated with the discharge end of the furnace tube, the discharge pipe is communicated with the discharge end of the material collecting cavity, the valve is communicated with the discharge end of the discharge pipe, one end of the cooling sleeve is sealingly connected with the material collecting cavity, and the other end is sealingly connected with the valve, the cooling sleeve is sleeved outside the discharge pipe, and a cooling gap is left between the cooling sleeve and the discharge pipe.

[0007] As a further improvement of the above technical scheme:

[0008] Cooling liquid input pipe and cooling liquid output pipe are arranged at both ends of the cooling sleeve respectively, and the cooling liquid input pipe is arranged at one end close to the valve.

[0009] A discharge position meter and a feeding position meter are arranged on the discharge pipe, and the discharge position meter and the feeding position meter are used to detect the material level in the discharge pipe.

[0010] The unloading cooling structure further comprises a stirring mechanism, and the stirring mechanism is used to stir the material in the discharge pipe.

[0011] The stirring mechanism comprises a rotating shaft, a driving motor and a plurality of stirring blades, the driving motor is installed at the top of the material collecting cavity, the rotating shaft is connected with the output end of the driving motor, and the plurality of stirring blades are arranged along the length direction of the rotating shaft in the discharging pipe.

[0012] The two stirring blades adjacent to each other are located at the two sides of the rotating shaft.

[0013] The material collecting cavity is provided with an observation window.

[0014] The observation window is provided with a process gas inlet and an oxygen measuring port.

[0015] The two ends of the discharging pipe are connected with the material collecting cavity and the valve through flange assemblies respectively, and the two ends of the cooling jacket pipe are sealingly connected with the corresponding flange assemblies.

[0016] The material collecting cavity is provided with a guide hopper close to the discharging port of the discharging pipe, and the diameter of the discharging end of the guide hopper is smaller than that of the feeding end of the discharging pipe.

[0017] Compared with the prior art, the advantages of the present application are that:

[0018] The discharging and cooling structure of the rotary furnace disclosed by the present application cools the material through the additional discharging pipe and the cooling jacket pipe, can protect the furnace pipe and reduce the loss of heating power in the furnace pipe, and continuously keeps the material in the discharging pipe, maintains the sealing condition in the furnace, has a simple structure, and the cooling liquid can fully contact with the discharging pipe through the cooling gap, has a large contact area and good cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the discharging and cooling structure of the rotary furnace of the present application.

[0020] Figure 2 is another structural schematic view of the discharging and cooling structure of the rotary furnace of the present application.

[0021] In the drawing, the numbers represent: 1, material collecting cavity; 11, observation window; 12, guide hopper; 2, discharging pipe; 21, discharging level meter; 22, feeding level meter; 3, valve; 4, cooling jacket pipe; 41, cooling liquid input pipe; 42, cooling liquid output pipe; 5, furnace pipe; 6, cooling gap; 7, stirring mechanism; 71, rotating shaft; 72, driving motor; 73, stirring blade; 8, flange assembly. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below in combination with the drawing and specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Figure 1 and Figure 2 This invention illustrates an embodiment of the feeding and cooling structure of a rotary kiln. The feeding and cooling structure of the rotary kiln in this embodiment includes a collecting chamber 1, a feeding pipe 2, a valve 3, and a cooling sleeve 4. The collecting chamber 1 is connected to the discharge end of the furnace tube 5, the feeding pipe 2 is connected to the discharge end of the collecting chamber 1, the valve 3 is connected to the discharge end of the feeding pipe 2, one end of the cooling sleeve 4 is sealed to the collecting chamber 1, and the other end is sealed to the valve 3. The cooling sleeve 4 is sleeved outside the feeding pipe 2, and a cooling gap 6 is left between the cooling sleeve 4 and the feeding pipe 2.

[0026] In this rotary kiln's feeding and cooling structure, the material in the furnace tube 5 flows into the collecting chamber 1, then enters the feeding pipe 2 by its own gravity, filling the gap between the feeding pipe 2 and the valve 3 to achieve a sealing effect. At this time, the material is at a high temperature. Cooling water is then introduced into the cooling sleeve 4, flowing through the cooling gap 6 to cool the material in the feeding pipe 2. After the material in the feeding pipe 2 reaches the set material level, the valve 3 opens, allowing the cooled material at the bottom to be discharged. After the bottom material is discharged to the set height, the valve 3 closes, while the material just discharged from the top remains piled up in the feeding pipe 2, providing a continuous seal between the feeding pipe 2 and the valve 3. This rotary kiln's feeding and cooling structure, by additionally setting the feeding pipe 2 and cooling sleeve 4 to cool the material, can protect the furnace tube 5, reduce the loss of heating power in the furnace tube 5, and simultaneously maintain a continuous presence of material in the feeding pipe 2, preserving the sealing conditions inside the furnace. The structure is simple, and the coolant can fully contact the feeding pipe 2 through the cooling gap 6, resulting in a large contact area and good cooling effect.

[0027] Further, in the embodiment, the cooling sleeve 4 is provided with a cooling liquid inlet pipe 41 and a cooling liquid outlet pipe 42 at two ends respectively, and the cooling liquid inlet pipe 41 is located at one end close to the valve 3. The cooling liquid enters the cooling gap 6 from the cooling liquid inlet pipe 41 to cool the material at the bottom of the downcomer 2 first, so as to ensure the cooling effect when the material at the bottom is discharged, and then cools upward, and finally is discharged from the cooling liquid outlet pipe 42. Of course, in other embodiments, a cooling coil, a heat dissipation fin or the like can be used to cool the material in the downcomer 2.

[0028] Further, in the embodiment, the downcomer 2 is provided with a downfeed level meter 21 and an upfeed level meter 22, which are used to detect the material level in the downcomer 2. When the material in the downcomer 2 reaches the detection position of the upfeed level meter 22, the valve 3 is opened, the material in the downcomer 2 is discharged, until it reaches the detection position of the downfeed level meter 21, the valve 3 is closed, so that there is always material in the downcomer 2 to maintain sealing.

[0029] Further, in the embodiment, the downfeed cooling structure further comprises a stirring mechanism 7, which is used to stir the material in the downcomer 2. The stirring mechanism 7 can scatter the material on one hand to avoid caking, and on the other hand can stir the material to improve the cooling effect of the material in the middle of the downcomer 2.

[0030] Further, in the embodiment, the stirring mechanism 7 comprises a rotating shaft 71, a driving motor 72 and a plurality of stirring blades 73, the driving motor 72 is installed at the top of the material collecting cavity 1, the rotating shaft 71 is connected with the output end of the driving motor 72, and the plurality of stirring blades 73 are arranged along the length direction of the rotating shaft 71 in the downcomer 2. The driving motor 72 drives the rotating shaft 71 to rotate, and at this time the stirring blades 73 stir and break the material in the downcomer 2. Preferably, the connecting part of the downcomer 2 and the material collecting cavity 1 can also be provided with stirring blades 73 to avoid blocking.

[0031] Further, in the embodiment, the two stirring blades 73 adjacent to each other are located on the two sides of the rotating shaft 71 respectively. The stirring effect is improved.

[0032] Further, in the embodiment, the material collecting cavity 1 is provided with an observation window 11. The state in the material collecting cavity 1 can be observed through the observation window 11.

[0033] Further, in the embodiment, the observation window 11 is provided with a process gas inlet and an oxygen measuring port. The required process gas can be introduced into the material collecting cavity 1 through the process gas inlet (not shown in the figure), and the oxygen content in the material collecting cavity 1 is measured through the oxygen measuring port (not shown in the figure).

[0034] Further, in the embodiment, the two ends of the discharging pipe 2 are connected with the material collecting cavity 1 and the valve 3 through the flange assemblies 8 respectively, and the two ends of the cooling sleeve 4 are sealingly connected with the corresponding flange assemblies 8 respectively.

[0035] Further, in the embodiment, the material collecting cavity 1 is provided with a guide hopper 12 close to the discharging port of the discharging pipe 2, and the diameter of the discharging end of the guide hopper 12 is smaller than the diameter of the feeding end of the discharging pipe 2.

[0036] Although the present application has been disclosed with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application, or modify equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the protection scope of the technical scheme of the present application.

Claims

1. A material feeding and cooling structure for a rotary kiln, characterized in that: The device comprises a material collecting cavity (1), a discharging pipe (2), a valve (3) and a cooling jacket (4), the material collecting cavity (1) is communicated with the discharging end of a furnace pipe (5), the discharging pipe (2) is communicated with the discharging end of the material collecting cavity (1), the valve (3) is communicated with the discharging end of the discharging pipe (2), one end of the cooling jacket (4) is sealingly connected with the material collecting cavity (1), the other end is sealingly connected with the valve (3), the cooling jacket (4) is sleeved on the discharging pipe (2) and a cooling gap (6) is left between the cooling jacket (4) and the discharging pipe (2).

2. The material discharge cooling structure of a rotary furnace according to claim 1, characterized by: The cooling jacket (4) is provided with a cooling liquid input pipe (41) and a cooling liquid output pipe (42) at two ends respectively, the cooling liquid input pipe (41) is located at one end close to the valve (3).

3. The material discharge cooling structure of a rotary furnace according to claim 1, characterized by: The discharging pipe (2) is provided with a discharging level meter (21) and a feeding level meter (22), the discharging level meter (21) and the feeding level meter (22) are used for detecting the material level in the discharging pipe (2).

4. The material discharge cooling structure of a rotary furnace according to claim 1, characterized by: The discharging cooling structure further comprises a stirring mechanism (7), the stirring mechanism (7) is used for stirring the material in the discharging pipe (2).

5. The material discharge cooling structure of a rotary furnace according to claim 4, characterized in that: The stirring mechanism (7) comprises a rotating shaft (71), a driving motor (72) and a plurality of stirring blades (73), the driving motor (72) is installed on the top of the material collecting cavity (1), the rotating shaft (71) is connected with the output end of the driving motor (72), and the plurality of stirring blades (73) are arranged along the length direction of the rotating shaft (71) in the discharging pipe (2).

6. The material discharge cooling structure of a rotary furnace according to claim 5, characterized in that: The two stirring blades (73) adjacent to each other are located at two sides of the rotating shaft (71) respectively.

7. The material discharge cooling structure of a rotary furnace according to any one of claims 1 to 6, characterized in that: The material collecting cavity (1) is provided with an observation window (11).

8. The material discharging cooling structure of a rotary furnace according to claim 7, characterized in that: The observation window (11) is provided with a process gas inlet and an oxygen measuring port.

9. The material discharge cooling structure of a rotary furnace according to any one of claims 1 to 6, characterized by: The two ends of the discharging pipe (2) are connected with the material collecting cavity (1) and the valve (3) through flange assemblies (8) respectively, and the two ends of the cooling jacket (4) are sealingly connected with corresponding flange assemblies (8).

10. The material discharging cooling structure of a rotary furnace according to claim 9, characterized in that: The material collecting cavity (1) is provided with a guide hopper (12) close to the discharging port of the discharging pipe (2), and the diameter of the discharging end of the guide hopper (12) is smaller than that of the feeding end of the discharging pipe (2).

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