Cooling device for feeding end of furnace core tube

Abstract

The utility model discloses a cooling device for a feeding end of a furnace core tube, which comprises an annular tube, and the annular tube is used for surrounding the periphery of a feeding tube; the input end of the annular pipe is communicated with external cooling substance supply equipment; a plurality of nozzles are mounted on the peripheral surface of the annular pipe at intervals, and the nozzles are used for facing an isolation gap between the annular boss and the feeding pipe and spraying cooling substances into the isolation gap. The nozzle sprays cooling gas to the isolation gap, so that the temperature of the annular gap and the annular boss can be effectively reduced, the heating aging of the packing is delayed, the volatilization of lubricating oil is reduced, and the service life of a sealing material is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of the core tube of a rotary kiln, in particular to a cooling device for the feeding end of the core tube. Background Art

[0002] The existing rotary kiln includes a feeding sealing cover, a core tube and a screw feeder. A feeding port is arranged in the middle of the feeding sealing cover. One end of the core tube close to the feeding sealing cover is the feeding end. A feeding pipe is installed at the feeding end of the core tube. The screw feeder sequentially passes through the feeding port and the feeding pipe to convey the material to be fired to the core tube. The end of the feeding pipe abuts against the end face of the adjacent feeding sealing cover. The feeding pipe rotates together with the core tube, so that the material to be fired tumbles in the core tube, thereby improving the uniformity of the temperature distribution during the firing of the material.

[0003] In the prior art, a sealing material such as packing is used to seal the gap between the end of the feeding pipe and the end face of the feeding sealing cover. Heat continuously flows out from this gap and heats the sealing material, making the sealing material prone to aging due to heat and leakage. Therefore, the sealing material often needs to be replaced, and when replacing the sealing material, the rotary kiln needs to be stopped, reducing the production efficiency of the rotary kiln. Content of the Utility Model

[0004] Aiming at the above deficiencies, the purpose of the utility model is to provide a cooling device for the feeding end of the core tube, which solves the problem that the sealing material is prone to aging due to heat, affecting the production efficiency of the rotary kiln.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A cooling device for the feeding end of the core tube, the cooling device includes an annular tube, and the annular tube is used to surround the outer periphery of the feeding pipe; the input end of the annular tube is communicated with an external cooling substance supply device;

[0007] A plurality of nozzles are spacedly installed on the outer peripheral surface of the annular tube, and the nozzles are used to face the isolation gap between the circular ring boss and the feeding pipe and spray cooling substances into the isolation gap.

[0008] Further, the cooling device further includes a heat insulation pad;

[0009] The heat insulation pad is used to wrap the outer peripheral surface of the feeding pipe.

[0010] Further, the cooling device further includes a plurality of cooling gas input nozzles;

[0011] The plurality of cooling gas input nozzles are used to be installed on the outer peripheral surface of the annular mounting plate close to the feeding sealing cover side and are used to input cooling gas into the annular gap between the mounting plate and the circular ring boss to form a cold air isolation film.

[0012] Preferably, the cooling substance is a cooling gas.

[0013] Optionally, the cooling gas inlet nozzle is in communication with the gas source of the cooling gas.

[0014] Optionally, the cooling gas inlet nozzle is in communication with the annular pipe through a pipeline.

[0015] Optionally, the cooling substance is cooling water.

[0016] Preferably, the cooling gas is the same as the protective gas for the feed sealing cover and the hearth tube.

[0017] Preferably, the heat insulation pad is glass wool or aluminum silicate heat preservation board.

[0018] The beneficial effects that the technical solution proposed by the present utility model may have are as follows: The cooling device at the feed end of the hearth tube sprays a cooling substance towards the isolation gap through multiple nozzles of the annular pipe, which can effectively reduce the temperature of the annular gap and the circular ring boss, thereby delaying the heat aging of the sealing material such as packing, reducing the volatilization of lubricating oil, prolonging the service life of the sealing material such as packing, and further reducing the impact on the production efficiency of the rotary kiln. Description of the Drawings

[0019] Figure 1 It is a cross-sectional structure schematic diagram of an embodiment of a cooling device at the feed end of a hearth tube of the present utility model;

[0020] Figure 2 It is a schematic diagram of an embodiment of a cooling device at the feed end of a hearth tube of the present utility model;

[0021] Figure 3 is Figure 1 an enlarged view of part A in

[0022] Wherein: feed sealing cover 1; hearth tube 2; sealing assembly 3; cooling device 4; feed pipe 21; circular ring boss 23; packing 31; mounting plate 32; lubricating oil inlet nozzle 33; annular pipe 41; heat insulation pad 42; cooling gas inlet nozzle 43; isolation gap 230; annular connecting plate 231; annular gap 320; nozzle 411. Detailed Embodiments

[0023] The following combines the attached Figures 1 - 3 and further illustrates the technical solution of the present utility model through specific embodiments.

[0024] The accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustration of this embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be said that the interiors of two components are in communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] A cooling device for the feed end of a furnace core tube, the cooling device 4 includes an annular tube 41, and the annular tube 41 is used to surround the outer periphery of the feed tube 21; the input end of the annular tube 41 is communicated with an external cooling substance supply device;

[0027] A plurality of nozzles 411 are spaced and installed on the outer peripheral surface of the annular tube 41, and the nozzles 411 are used to face the isolation gap 230 between the circular ring boss 23 and the feed tube 21 and spray cooling substances into the isolation gap 230.

[0028] Figure 1 It is a cross-sectional structure schematic diagram of an embodiment of a cooling device for the feed end of a furnace core tube of the present utility model, Figure 2 It is a schematic diagram of the structure of an embodiment of the cooling device 4 for the feed end of the furnace core tube of the present utility model, Figure 3 For Figure 1 The enlarged view of part A in Figures 1 - 3 At the feed end of the furnace core tube 2 in, a feed tube 21 is installed. The circular ring boss 23 is fixed to the outer peripheral surface of the feed tube 21 through an annular connecting plate 231. The circular ring boss 23 is located at one end of the feed tube 21 close to the feed sealing cover 1. The annular connecting plate 231, the circular ring boss 23 and the feed tube 21 enclose an annular isolation gap 230; the feed tube 21 and the circular ring boss 23 rotate synchronously with the furnace core tube 2; a sealing assembly 3 is installed on the outer periphery of the circular ring boss 23. The sealing assembly 3 includes a mounting plate 32, a plurality of packing rings 31 and a plurality of lubricating oil input nozzles 33. The plurality of packing rings 31 are arranged at intervals along the axial direction and surround the outer peripheral surface of the circular ring boss 23. The annular mounting plate 32 surrounds the outer periphery of the circular ring boss 23. One end of the mounting plate 32 is fixed to the feed sealing cover 1. The plurality of packing rings 31 seal the annular gap 320 between the mounting plate 32 and the circular ring boss 23. The plurality of lubricating oil input nozzles 33 are spaced and installed on the outer peripheral surface of the mounting plate 32, and lubricating oil can be input into the annular gap 320 through the lubricating oil input nozzles 33.

[0029] For the cooling device at the feed end of the furnace core tube of the present utility model, cooling substances are sprayed towards the isolation gap 230 through a plurality of nozzles 411, which can effectively reduce the temperature of the annular gap 320 and the circular ring boss 23, and reduce the volatilization of lubricating oil.

[0030] It should be noted that the diameter of the feed pipe 21 can be set to be smaller than the diameter of the furnace core tube 2 to reduce the transfer of heat in the furnace core tube 2 to the feed pipe 21 and the circular ring boss 23, and improve the cooling effect.

[0031] Furthermore, the cooling device 4 further includes a heat insulation pad 42;

[0032] The heat insulation pad 42 is used to wrap the outer peripheral surface of the feed pipe 21.

[0033] As Figures 1 - 3 shown, wrapping the heat insulation pad 42 around the outer peripheral surface of the feed pipe 21 can reduce heat loss, and can also prevent the annular pipe 41 from being affected by heat and influencing the temperature of the output cooling gas, further improving the cooling effect of the cooling substances sprayed by the nozzles 411 on the isolation gap 230.

[0034] Furthermore, the cooling device 4 further includes a plurality of cooling gas input nozzles 43;

[0035] The plurality of cooling gas input nozzles 43 are used to be installed on the outer peripheral surface of the annular mounting plate 32 close to the feed sealing cover 1 side, and are used to input cooling gas into the annular gap 320 between the mounting plate 32 and the circular ring boss 23 to form a cold air isolation film.

[0036] As Figures 1 - 3 shown, cooling gas is respectively input into the annular gap 320 between the mounting plate 32 and the circular ring boss 23 through the plurality of cooling gas input nozzles 43, and a cold air isolation film is formed. The cold air isolation film can cool and reduce the ambient temperature in the annular gap 320, cool the surface of the circular ring boss 23 and reduce its temperature, thereby reducing the influence of the hot air flow flowing into the annular gap 320 on the packing 31 and the lubricating oil, and further improving the service life of the packing 31.

[0037] Preferably, the cooling substance is cooling gas.

[0038] Optionally, the cooling gas input nozzle 43 is communicated with the gas source of the cooling gas.

[0039] Optionally, the cooling gas input nozzle 43 is communicated with the annular pipe 41 through a pipeline.

[0040] During implementation, you can choose to use the cooling gas input nozzle 43 to connect with the cooling gas source; you can also choose to use one end of the annular tube 41 as the input end and connect it to the cooling gas source through a pipeline, and then use the other end of the annular tube 41 as the output end to connect to the cooling gas input nozzle 43 to deliver cooling gas to the cooling gas input nozzle 43, which can simplify the cooling gas delivery pipeline.

[0041] Optionally, the cooling substance is cooling water.

[0042] Cooling gas or cooling water can be selected as the cooling material according to the conditions of the on-site environment and the required cooling effect.

[0043] Preferably, the cooling gas is the same as the protective gas used for the feed sealing cover 1 and the furnace core tube 2 .

[0044] When the rotary kiln is in operation, it is necessary to burn materials in a protective atmosphere. Using the same protective gas as the protective atmosphere as the cooling gas can prevent the cooling gas from affecting the quality of the materials burned in the rotary kiln.

[0045] Preferably, the thermal insulation pad 42 is glass wool or an aluminum silicate insulation board.

[0046] Both glass wool and aluminum silicate insulation boards have good high temperature resistance and good thermal insulation effects.

[0047] In summary, if Figures 1 - 3 In the embodiment of the utility model shown, the cooling device at the feed end of the furnace core tube sprays cooling gas toward the isolation gap 230 through multiple nozzles 411 of the annular tube 41, which can effectively reduce the temperature of the annular gap 320 and the annular boss 23, thereby delaying the thermal aging of sealing materials such as the packing 31 and the volatilization of the lubricating oil, extending the service life of the sealing material, and thus reducing the impact on the production efficiency of the rotary kiln.

[0048] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A cooling device for the feeding end of a furnace core tube, characterized in that, The cooling device includes an annular pipe which is used to surround the outer circumference of the feed pipe; the input end of the annular pipe is communicated with an external cooling substance supply device; A plurality of nozzles are installed at intervals on the outer circumferential surface of the annular pipe, and the nozzles are used to face the isolation gap between the circular ring boss and the feed pipe and spray cooling substance into the isolation gap.

2. The cooling device for the feed end of the hearth tube according to claim 1, characterized in that, The cooling device further includes a heat insulation pad; The heat insulation pad is used to wrap the outer circumferential surface of the feed pipe.

3. The cooling device for the feed end of the hearth tube according to claim 1, characterized in that, The cooling device further includes a plurality of cooling gas input nozzles; The plurality of cooling gas input nozzles are used to be installed on the outer circumferential surface of the annular mounting plate close to the feed sealing cover side and are used to input cooling gas into the annular gap between the mounting plate and the circular ring boss to form a cold air isolation film.

4. The cooling device at the feed end of the furnace core tube according to claim 3, characterized in that, The cooling substance is cooling gas.

5. The cooling device at the feed end of the furnace core tube according to claim 4, characterized in that, The cooling gas input nozzle is communicated with the gas source of the cooling gas.

6. The cooling device for the feed end of the hearth tube according to claim 4, characterized in that, The cooling gas input nozzle is communicated with the annular pipe through a pipeline.

7. The cooling device for the feed end of the furnace core tube according to claim 1, characterized in that, The cooling substance is cooling water.

8. The cooling device for the feed end of the furnace core tube according to claim 3 or 4, characterized in that, The cooling gas is the same as the protective gas for the feed sealing cover and the furnace core pipe.

9. The cooling device at the feed end of the furnace core tube according to claim 2, wherein, The heat insulation pad is glass wool or aluminosilicate insulation board.

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