Multi-tube type inner sleeve rotary heat exchanger

Abstract

The utility model discloses a multi-pipe type inner sleeve rotary heat exchanger which comprises a rotary heat exchanger body, a plurality of material channels are arranged in the rotary heat exchanger body, the plurality of material channels are respectively communicated between a feeding end and a discharging end of the rotary heat exchanger body, and a heating channel is arranged on the periphery of each material channel. According to the rotary heat exchanger, the multiple material channels are adopted, and the heating channels are arranged outside the material channels, so that the temperature of materials in each material channel can be more uniform; compared with a traditional kiln with the same diameter, the heat exchange area is correspondingly increased, the diameter of the material channel is reduced, the temperature of materials in the material channel is more uniform, the thickness of a material layer is also reduced, the temperature uniformity of the materials with poor heat transfer rate is better, and the structure highlights the superiority especially for the materials requiring low temperature deviation in the heating process. As the heat transfer rate is relatively improved, the defect of capacity can be made up by increasing the rotating speed of the heat exchanger and improving the installation inclination of equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of rotary heat exchange, specifically relates to a multi -tube type inner sleeve pipe rotary heat exchanger. BACKGROUND

[0002] Rotary heat exchanger such as rotary kiln, rotary kiln is widely used in some production, has external heating, internal heating and is formed. The general structure is formed by rotating drum, rolling ring, riding wheel, gear ring. Due to the rapid development of industry, new material is continuously pushed out, and the traditional internal and external rotary heat type cannot meet the needs of production. Figure 1 As shown in the traditional rotary kiln structure, material is entered from the left end of high-temperature metal cylinder 2 through the feeding mechanism 1, the material in the material passage 3 in the high-temperature metal cylinder is entered into the flue gas passage 4 through high-temperature flue gas, and then the material is heated and warmed, and then discharged from the right end of the high-temperature metal cylinder, and the high-temperature metal cylinder is supported by rotating support device 5 and driven to rotate by transmission mechanism 6. The rotary kiln structure of this structure adopts a single material passage, and the uniformity of material warming is not high, and the material temperature has a large deviation. UTILITY MODEL CONTENTS

[0003] In view of the above technical problems, the utility model aims at providing a multi -tube type inner sleeve pipe rotary heat exchanger with multiple channels, improving the uniformity of material warming and reducing temperature deviation.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The multi -tube type inner sleeve pipe rotary heat exchanger comprises a rotary heat exchanger body, a plurality of material passages are arranged in the rotary heat exchanger body, the plurality of material passages are respectively connected between the feeding end and the discharging end of the rotary heat exchanger body, and a heating passage is arranged on the outer periphery of each material passage.

[0006] As a further embodiment, the rotary heat exchanger body is provided with an air inlet cover and an air outlet cover in communication with the heating passage.

[0007] As a further embodiment, an auxiliary electric heater is arranged in the heating passage.

[0008] As a further embodiment, the heating passage is arranged in the form of annular around the outer periphery of the material passage along the length direction of the material passage.

[0009] As a further embodiment, the feeding end of the rotary heat exchanger body is provided with a distribution cavity, the discharging end is provided with a discharging cavity, the end part of the material passage in the distribution cavity is provided with a distributor, and the distributor guides the material in the distribution cavity into the corresponding material passage.

[0010] As a further implementation, the rotary heat exchanger body is assembled by segmented heat exchanger bodies, and intermediate connecting sections are arranged between the segmented heat exchanger bodies, the intermediate connecting sections include intermediate connecting housings fixedly connected with the segmented heat exchanger bodies, the intermediate connecting housings are internally provided with communication channels in communication with the material channels, and gas communication pipelines communicating the heating channels between the segmented heat exchanger bodies.

[0011] As a further implementation, the communication channel is internally provided with a corrugated expansion structure.

[0012] As a further implementation, the gas communication pipeline includes a first communication pipeline, a second communication pipeline, and a bellows pipeline, the first communication pipeline and the second communication pipeline are respectively in communication with the heating channels in the segmented heat exchanger bodies, and the bellows pipeline is in communication between the first communication pipeline and the second communication pipeline.

[0013] Compared with the prior art, the rotary heat exchanger has the following advantages:

[0014] By adopting multiple material channels and heating channels arranged outside each material channel, the problem of poor uniformity of material temperature in a single material channel is avoided, and the rotary heat exchanger can make the material temperature in each material channel more uniform; compared with a conventional kiln of the same diameter, the heat exchange area is correspondingly increased, the diameter of the material channel is reduced, the material temperature in the material channel is more uniform, the material layer thickness is also smaller, the material temperature uniformity is better for materials with poor heat transfer rate, and the superiority of the structure is highlighted for materials requiring low temperature deviation during the heating process; since the heat transfer rate is relatively improved, the production capacity disadvantage can be compensated by increasing the rotary speed of the rotary heat exchanger body and increasing the installation inclination of the equipment.

[0015] The multi-channel structure design makes the whole rotary regenerator body not all of the outer periphery of the heating surface (relative to the traditional rotary kiln outer periphery of the high-temperature flue gas channel, the annular section of the high-temperature flue gas channel is a stress point), and changes the stress structure between the material channel and the heating channel (i.e. a part of the single heating channel is close to the outer periphery of the rotary regenerator body, and a part is in the rotary regenerator body, and the heating channel is only the part close to the outer periphery of the rotary regenerator body as a stress point), reduces the waste caused by the heat diffusion outside through the outer periphery of the rotary regenerator body, and greatly improves the working temperature of the rotary regenerator. At the same time, due to the change of the stress structure, non-metallic materials can be used as the forming components of the material channel, and the forming components can be made of silicon carbide, graphite, carbon-carbon plate, ceramic tube, etc. The use of non-metallic materials can achieve a higher working temperature, and the use of all-metal materials can achieve a working temperature of ≤1000℃ even if high-temperature alloy is used. The structure can improve the working temperature by 100-150℃ under the condition of the same material, and since most of the heat exchange surfaces between the channels are not subjected to external force, and the support points of the rotary regenerator body can be distributed, the material thickness is greatly reduced, the cost of the rotary regenerator is reduced, and the service life of the rotary regenerator is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of a traditional rotary regenerator;

[0017] Figure 2 It is a structural schematic view of the first embodiment of the rotary regenerator of the utility model;

[0018] Figure 3 It is a structural schematic view of the second embodiment of the rotary regenerator of the utility model;

[0019] The reference signs in the drawings represent the following:

[0020] 1, feeding mechanism, 2, high-temperature metal cylinder, 3, material channel, 4, flue gas channel, 5, rotating support device, 6, transmission mechanism;

[0021] 10, rotary regenerator body, 11, material channel, 12, heating channel, 13, gas inlet cover, 14, gas outlet cover, 15, material distribution cavity, 16, material discharge cavity, 17, material distributor, 18, intermediate connecting section, 19, intermediate connecting shell, 20, communication channel, 21, corrugated expansion structure, 22, first communication pipe, 23, second communication pipe, 24, wave tube. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Please refer to Figure 2 As shown in the figure, the multi-tube inner sleeve rotary heat exchanger comprises a circular rotary heat exchanger body 10, a plurality of circular material channels 11 are arranged in the rotary heat exchanger body 10, the plurality of material channels 11 are arranged along the axial direction of the rotary heat exchanger body 10, and the plurality of material channels 11 are respectively connected between the inlet end and the outlet end of the rotary heat exchanger body 10, that is, the material at the inlet end can enter the plurality of material channels 11 and be discharged from the outlet end, and a heating channel 12 is arranged outside each material channel 11. By adopting the plurality of material channels 11 and the heating channel 12 arranged outside each material channel 11, the material forms a plurality of channels in the rotary heat exchanger body 10 and is conveyed from the inlet end to the outlet end, and heat transfer is formed in each material channel 11 through the heating channel 12, so that the material in the material channel 11 is heated. Through the structural arrangement of the plurality of material channels 11, the problem of low uniformity of material heating in a single material channel 11 is avoided, the heat exchange area of the heating channel 12 and the material in the material channel 11 is relatively increased, and the heat transfer capacity is also improved, so that the temperature of the material in each material channel 11 is more uniform. Compared with the traditional kiln of the same diameter, the heat exchange area is increased, the diameter of the material channel 11 is reduced, the temperature of the material in the material channel 11 is more uniform, the thickness of the material layer is also reduced, the uniformity of the material temperature is better for the material with poor heat transfer rate, especially for the material which requires low temperature deviation during heating. The structure highlights its superiority. Since the heat transfer rate is relatively improved, the production capacity disadvantage can be compensated by increasing the rotation speed of the rotary heat exchanger body 10 and the installation inclination of the equipment.

[0024] In some embodiments, the rotary heat exchanger body 10 is provided with an air inlet cover 13 and an air outlet cover 14 which are in communication with the heating channel 12. The air inlet cover 13 and the air outlet cover 14 are fixedly arranged outside the rotary heat exchanger body 10, that is, the rotary heat exchanger body 10 rotates, and the air inlet cover 13 and the air outlet cover 14 do not rotate. The rotary heat exchanger body 10 and the air inlet cover 13 and the air outlet cover 14 are respectively sealed by a rotary sealing structure, which is a commonly used technology and will not be described in detail. In this way, the high-temperature flue gas originally used can be used as a heating medium in the heating channel 12, and heat conduction heating is performed on the material in each material channel 11.

[0025] In some embodiments, an auxiliary electric heater is provided in the heating channel 12. The auxiliary electric heater can be used in conjunction with the aforementioned high-temperature flue gas or used independently to heat the area within the heating channel 12. The auxiliary electric heater can be a heating wire or an electrically heated silicon carbide rod. An electric slip ring is added to the heat exchanger body 10 to transfer electrical energy to the auxiliary electric heater, thereby providing more heating methods for the heat exchanger. The electric slip ring involved here mainly provides stable power transfer to the auxiliary electric heater when the heat exchanger body 10 rotates; this is prior art and will not be elaborated upon here.

[0026] In some embodiments, the heating channels 12 are arranged in a ring around the outside of the material channel 11 along the length of the material channel 11, that is, the heating channels 12 are evenly distributed around the outside of the material channel 11, and the high temperature in the heating channels 12 can be transferred to the material channel 11 more evenly, so that the material in the material channel 11 is heated evenly.

[0027] In some embodiments, the feed end of the recirculating heat exchanger body 10 is provided with a feeding chamber 15, and the discharge end is provided with a discharge chamber 16. The feeding chamber 15 is used to receive the material conveyed by the feeding mechanism, and the discharge chamber 16 is used to receive the heated material and discharge it from the recirculating heat exchanger. A distributor 17 is provided at the end of the material channel 11 in the feeding chamber 15, and the distributor 17 guides the material in the feeding chamber 15 into the corresponding material channel 11. The distributor 17 can be a receiving groove inclinedly arranged at the end of the material channel 11. When the recirculating heat exchanger body 10 rotates, the distributor 17 can guide the material in the feeding chamber 15 into the material channel 11.

[0028] In some embodiments, such as Figure 3 The illustrated recirculating heat exchanger structure comprises two segmented heat exchanger bodies 10, the number of which can be adjusted according to the length of the recirculating heat exchanger body 10. An intermediate connecting section 18 is provided between the segmented heat exchanger bodies, and the intermediate connecting end is fixedly connected to the two segmented heat exchanger bodies via flanges. The intermediate connecting section 18 includes an intermediate connecting shell 19 fixedly connected to the segmented heat exchanger bodies. A connecting channel 20 is provided within the intermediate connecting shell 19, communicating with the material channels 11 on both sides of the intermediate connecting end, and a gas connecting pipe communicating with the heating channels 12 between the segmented heat exchanger bodies, allowing high-temperature flue gas to circulate within the heating channels 12 on both sides of the intermediate connecting section 18. The intermediate connecting section 18 is designed to meet the length requirements of the recirculating heat exchanger body 10 and the material heating residence time requirements as much as possible, while also avoiding transportation difficulties caused by a long recirculating heat exchanger body 10, and solving the corresponding problems associated with a long recirculating heat exchanger body 10.

[0029] In some embodiments, in order to eliminate the problem of thermal expansion of the rotary heat exchanger body 10, a corrugated expansion structure 21 is arranged in the communication channel 20, i.e. a corrugated expansion surface is arranged on the inner wall of the communication channel 20 to compensate for the thermal expansion.

[0030] In some embodiments, the gas communication pipeline includes a first communication pipe 22, a second communication pipe 23, and a wave pipe 24, the first communication pipe 22 and the second communication pipe 23 are respectively connected to the heating channels 12 in the segmented heat exchanger body to form a communication, and the wave pipe 24 is connected between the first communication pipe 22 and the second communication pipe 23. The number and inner diameter of the gas communication pipeline are set according to the needs, and the main purpose is to form a communication flow in the high-temperature heating channels 12, and the wave pipe can compensate for the problem of thermal expansion.

[0031] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-tube internal sleeve rotary heat exchanger comprising a rotary heat exchanger body, characterized in that, A plurality of material channels are arranged in the rotary heat exchanger body, and the plurality of material channels are respectively communicated between the feeding end and the discharging end of the rotary heat exchanger body, and a heating channel is arranged outside the periphery of each material channel.

2. The multi-tube inner jacketed rotary heat exchanger according to claim 1, wherein, Air inlets and air outlets are arranged on the rotary heat exchanger body and are communicated with the heating channels.

3. The multi-tube inner-jacketed rotary heat exchanger according to claim 1 or 2, characterized in that, An auxiliary electric heater is arranged in the heating channel.

4. The multi-tube inner-jacketed regenerative heat exchanger according to claim 1, wherein The heating channel is arranged in a ring shape around the outside of the material channel along the length direction of the material channel.

5. The multi-tube inner-jacketed rotary heat exchanger according to claim 1, wherein The feeding end of the rotary heat exchanger body is provided with a material distributing cavity, the discharging end is provided with a discharging cavity, and the end of the material channel in the material distributing cavity is provided with a material distributor, which guides the material in the material distributing cavity into the corresponding material channel.

6. The multi-tube inner-jacketed regenerative heat exchanger according to claim 1, wherein The rotary heat exchanger body is assembled by a segmented heat exchanger body, and an intermediate connecting section is arranged between the segmented heat exchanger bodies, the intermediate connecting section comprises an intermediate connecting shell fixedly connected with the segmented heat exchanger body, a communication channel communicated with the material channel is arranged in the intermediate connecting shell, and a gas communication pipeline communicating the heating channels between the segmented heat exchanger bodies is arranged.

7. The multi-tube inner-jacketed regenerative heat exchanger according to claim 1, wherein A corrugated expansion structure is arranged in the communication channel.

8. The multi-tube inner-jacketed rotary heat exchanger according to claim 6, wherein The gas communication pipeline comprises a first communication pipe, a second communication pipe and a bellows pipe, the first communication pipe and the second communication pipe are respectively communicated with the heating channels in the segmented heat exchanger bodies, and the bellows pipe is communicated between the first communication pipe and the second communication pipe.

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