Electrolytic aluminum anode scrap waste heat recycling device

Abstract

The utility model relates to the technical field of aluminum electrolysis, in particular to an electrolytic aluminum anode scrap waste heat recycling device which comprises a closed container, a heat storage box and a bracket, one end of the closed container is provided with an opening; a sealing door is arranged at the opening; a communicating slot is formed in the top of the closed container; a circulation opening is formed in the closed container; the heat storage box is fixedly arranged at the top of the closed container and communicates with the interior of the closed container through the communicating groove hole. The heat storage box is filled with honeycomb-shaped ceramic heat storage materials. A separation net is arranged on the inner side of the closed container; a containing cavity is formed between the separation net and the inner wall of the closed container; the containing cavity is filled with honeycomb-shaped ceramic heat storage materials. The bracket is used for supporting a tray for containing the anode. The device can recover the heat energy of the hot anode scrap and preheat the new anode, so that the energy waste is reduced, and the stability and economical efficiency of the electrolytic bath are improved; meanwhile, dust and hydrogen fluoride gas are collected, and the influence on the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum electrolysis technical field especially relates to a residual pole waste heat recycling device of electrolytic aluminium. BACKGROUND

[0002] In the production process of aluminum electrolysis cell, the anode is consumed continuously in the electrolysis cell with electrochemical reaction, and needs to be replaced regularly; the new anode after replacement needs to be heated to a sufficient temperature to conduct electricity and continue the electrochemical reaction. In the prior art, the replaced carbon anode (called residual pole) is placed in the residual pole workshop for natural cooling; since the temperature of the hot residual pole is about 950-1000 degrees, a large amount of heat and hydrogen fluoride gas (mainly generated due to the contact of the high-temperature residual pole with moisture in the air) carried by the residual pole volatilizes into the natural environment, not only causing waste of heat energy, but also polluting the environment. After the replacement of the new anode, a large amount of energy needs to be consumed to heat the new anode, especially in cold environments, the temperature of the new anode outdoors is very low, and the humidity of the outer surface is large, so the temperature of the new anode needs to be gradually increased from zero to the normal production temperature of the electrolysis, which requires a large amount of heat to be absorbed from the electrolysis cell, increasing the energy consumption and adversely affecting the stability, heat balance, current efficiency, anode current distribution, etc. of the electrolysis cell. SUMMARY

[0003] Therefore, the utility model provides a residual pole waste heat recycling device of electrolytic aluminium, mainly aims at recycling the heat energy of the hot residual pole, preheating the new anode, reducing energy waste, improving the stability and economy of the electrolysis cell, and collecting dust and hydrogen fluoride gas to reduce the impact on the environment.

[0004] To achieve the above-mentioned purpose, the utility model mainly provides the following technical scheme:

[0005] The embodiment of the utility model provides a residual pole waste heat recycling device of electrolytic aluminium, which comprises: a closed container, a heat storage box and a bracket.

[0006] One end of the closed container has an opening; a sealing door is arranged at the opening; the sealing door can selectively open or close the opening;

[0007] The top of the closed container has a communication groove hole; the closed container has a flow-through port;

[0008] A temperature detection device is arranged on the closed container;

[0009] The heat storage box is fixedly arranged at the top of the closed container, located at the communication groove hole, and communicates with the inside of the closed container through the communication groove hole; the heat storage box is filled with honeycomb-shaped ceramic heat storage material;

[0010] The outer wall of the closed container is provided with a heat insulation layer.

[0011] The inner side of the closed container is provided with a partition net; a cavity is formed between the partition net and the inner wall of the closed container; the cavity is filled with honeycomb ceramic heat storage material.

[0012] The bracket comprises a support frame and a support leg.

[0013] The support frame is used for supporting a tray containing anodes.

[0014] The support frame is wrapped by a support net to form a rectangular cavity with a mesh structure; the rectangular cavity is filled with honeycomb ceramic heat storage material.

[0015] The upper end of the support leg is fixedly arranged on the support frame; the lower end of the support leg is arranged on the inner bottom of the closed container; a heat insulation support layer is arranged between the support leg and the closed container.

[0016] The heat storage tank is communicated with a communication port one of a reversing valve through a pipeline one.

[0017] The flow-through port is communicated with a communication port two of the reversing valve through a pipeline two.

[0018] A communication port three of the reversing valve is communicated with an aluminum electrolysis flue gas purification and dust collection system through a pipeline three.

[0019] A pipeline four is arranged on the communication port four of the reversing valve; an adjusting valve is arranged on the pipeline four.

[0020] The reversing valve selects the pipeline one and the pipeline three to be communicated, and the pipeline two and the pipeline four to be communicated; or selects the pipeline one and the pipeline four to be communicated, and the pipeline two and the pipeline three to be communicated.

[0021] Further, the width of the support frame is narrower than the width of the tray.

[0022] Further, the sealing door is an automatic roller shutter door.

[0023] Further, the adjusting valve is an electric butterfly valve.

[0024] By means of the above technical scheme, the electrolytic aluminum residual anode waste heat recycling device has at least the following advantages:

[0025] The heat energy of the residual anode can be recycled, and the new anode can be preheated, thereby reducing energy waste, improving the stability and economy of the electrolytic tank, and simultaneously collecting dust and hydrogen fluoride gas to reduce the influence on the environment.

[0026] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following is a preferred embodiment of the present application and the detailed description of the drawings as follows. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A schematic view of an electrolytic aluminum residual pole waste heat recycling device provided by the present application embodiment is shown in the figure.

[0028] Figure 2 A schematic view of the airflow direction after the control reversing valve of the electrolytic aluminum residual pole waste heat recycling device provided by the present application embodiment is shown in the figure.

[0029] The figure shows:

[0030] 1 is a closed container, 1-1 is a partition net, 1-2 is a heat insulation layer, 2 is a heat storage box, 3 is a bracket, 3-1 is a support frame, 3-2 is a support leg, 3-3 is a heat insulation support layer, 4 is a sealing door, 5 is an adjusting valve, 6 is a reversing valve, 7 is a temperature detection device, 8 is a pipeline one, 9 is a pipeline two, 10 is a pipeline four, 11 is a pipeline three, and 12 is a tray. DETAILED DESCRIPTION

[0031] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation, structure, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0032] As shown in Figure 1 and Figure 2 An embodiment of the present application proposes an electrolytic aluminum residual pole waste heat recycling device, which comprises: a closed container 1, a heat storage box 2 and a bracket 3; the closed container 1 can be a closed factory building; one end of the closed container 1 has an opening; the opening is used for a trailer or other transport tool to transport anodes into the closed container 1 or output the anodes from the closed container 1. When the trailer transports the anodes, the anodes are placed in the tray 12 for transportation. A sealing door 4 is arranged at the opening; the sealing door 4 can selectively open or close the opening; preferably, the sealing door 4 is an automatic roller shutter door, so as to facilitate automatic control of the sealing door 4, and automatically open or close when the vehicle enters or exits, facilitating sealing and heat preservation.

[0033] The top of the closed container 1 is provided with a communication groove hole for communication with the heat storage box 2; the closed container 1 is provided with a flow passage for the flow of gas; the closed container 1 is provided with a temperature detection device 7 for detecting the temperature in the closed container 1. The heat storage box 2 is fixedly arranged at the top of the closed container 1 at the communication groove hole and communicates with the inside of the closed container 1 through the communication groove hole; the heat storage box 2 is filled with honeycomb ceramic heat storage material for storing heat energy. The outer wall of the closed container 1 is provided with a heat insulation layer 1-2 to reduce heat loss in the closed container 1.

[0034] The inner side of the closed container 1 is provided with a partition net 1-1; the partition net 1-1 and the inner wall of the closed container 1 form a cavity; the cavity is filled with honeycomb ceramic heat storage material to comprehensively collect and store heat of the anode.

[0035] The bracket 3 comprises a support frame 3-1 and a support leg 3-2; the support frame 3-1 is used for supporting the tray 12 containing the anode; after the trailer enters the closed container 1, the tray 12 is placed on the support frame 3-1 and is supported by the support frame 3-1. The support frame 3-1 is wrapped by a support net to form a rectangular cavity with a mesh structure; the rectangular cavity is filled with honeycomb ceramic heat storage material to be fitted into the tray 12 and absorb heat on the anode. The upper end of the support leg 3-2 is fixedly arranged on the support frame 3-1; the lower end of the support leg 3-2 is arranged at the inner bottom of the closed container 1; a heat insulation support layer 3-3 is arranged between the support leg 3-2 and the closed container 1 to reduce heat conduction out of the support leg 3-2.

[0036] The heat storage box 2 communicates with the communication port one of the reversing valve 6 through the pipeline one 8; the flow passage communicates with the communication port two of the reversing valve 6 through the pipeline two 9; the communication port three of the reversing valve 6 communicates with the electrolytic aluminum flue gas purification and dust collection system through the pipeline three 11; the communication port four of the reversing valve 6 is provided with the pipeline four 10; the pipeline four 10 is provided with the adjusting valve 5; preferably, the adjusting valve 5 is an electric butterfly valve to facilitate automatic control.

[0037] The reversing valve 6 selects the pipeline one 8 and the pipeline three 11 to communicate, and the pipeline two 9 and the pipeline four 10 to communicate; or selects the pipeline one 8 and the pipeline four 10 to communicate, and the pipeline two 9 and the pipeline three 11 to communicate.

[0038] One embodiment of the utility model discloses an electrolytic aluminum residual electrode waste heat recycling device, can recover the heat energy of hot residual electrode, and preheats new anode, reduces energy waste, improves electrolytic tank stability and economy, collects dust and hydrogen fluoride gas simultaneously, reduces the influence on the environment.

[0039] Preferably, the width of the support frame 3-1 is narrower than the width of the tray 12 to facilitate the operation of the tray 12 by the trailer.

[0040] Preferably, one embodiment of the utility model discloses an electrolytic aluminium residual pole waste heat recycling device further includes: control system, control system is connected with regulating valve 5, sealing door 4 and temperature detection device 7 respectively to facilitate the realization of automatic control.

[0041] One embodiment of the utility model discloses an electrolytic aluminium residual pole waste heat recycling device, when the residual pole that needs heat dissipation is taken out from electrolytic cell during operation, can place hot residual pole on tray 12, transports tray 12 to closed container 1 through trailer, places on bracket 3, absorbs the heat of hot residual pole. After the heat of hot residual pole is absorbed, can control reversing valve 6, and opens regulating valve 5, and introduces a small part of outdoor air to increase circulation, and the flue gas of cooling enters electrolytic aluminium flue gas purification dust collection system through reversing valve 6, in order to make hydrogen fluoride gas be collected by electrolytic aluminium flue gas purification dust collection system, the flow of introduced outdoor air is less than dust collection flow, that is, the opening of regulating valve 5 is small, in this process, closed container 1 is in negative pressure state. When temperature detection device 7 detects that the flue gas temperature of closed container 1 reaches the set value, trailer carries residual pole out.

[0042] When new anode needs heating, trailer places new anode through tray 12 on bracket 3 in closed container 1, and the ceramic heat storage material in closed container 1 radiates heat and preheats new anode, can control reversing valve 6 and open regulating valve 5 at proper time, and introduce outdoor air to increase circulation, when anode is heated to a certain temperature, temperature detection device 7 detects that the flue gas temperature in closed container 1 reaches another set value, and trailer carries new anode out and enters electrolytic cell. Cycle use like this.

[0043] Further, although the terms first, second, etc. can be used herein to describe various elements, these terms should not be construed as limiting the elements. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] In the description of the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relation. For ordinary skilled person in the art, the above-mentioned term can be understood in the utility model with the concrete meaning of the specific situation.

[0045] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0046] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical scheme of the utility model.

Claims

1. A device for recovering and utilizing waste heat from electrolytic aluminum electrodes, characterized in that, It comprises a closed container, a heat storage tank and a bracket. One end of the closed container has an opening; a sealing door is arranged at the opening; the sealing door can selectively open or close the opening; The top of the closed container has a communication slot; the closed container has a flow-through port; The closed container is provided with a temperature detection device; The heat storage tank is fixedly arranged at the top of the closed container, at the communication slot, and communicates with the inside of the closed container through the communication slot; the heat storage tank is filled with honeycomb ceramic heat storage material; The outer wall of the closed container is provided with a heat insulation layer; The inner side of the closed container is provided with a partition net; a cavity is formed between the partition net and the inner wall of the closed container; the cavity is filled with honeycomb ceramic heat storage material; The bracket comprises a support frame and a support leg; The support frame is used to support a tray containing anodes; The support frame is wrapped with a support net to form a rectangular cavity with a mesh structure; the rectangular cavity is filled with honeycomb ceramic heat storage material; The upper end of the support leg is fixedly arranged on the support frame; the lower end of the support leg is arranged at the inner bottom of the closed container; a heat insulation support layer is arranged between the support leg and the closed container; The heat storage tank communicates with the communication port one of the reversing valve through pipeline one; The flow-through port communicates with the communication port two of the reversing valve through pipeline two; The communication port three of the reversing valve communicates with the flue gas purification and dust collection system of the electrolytic aluminum through pipeline three; The communication port four of the reversing valve is provided with pipeline four; the pipeline four is provided with an adjusting valve; The reversing valve selects the pipeline one to communicate with the pipeline three, and the pipeline two to communicate with the pipeline four; or selects the pipeline one to communicate with the pipeline four, and the pipeline two to communicate with the pipeline three.

2. The device for recovering and utilizing residual heat of electrolytic aluminum stub anode according to claim 1, characterized in that, The width of the support frame is narrower than the width of the tray.

3. The device for recovering and utilizing residual heat of electrolytic aluminum stub anode according to claim 1, characterized in that, The sealing door is an automatic roller shutter door.

4. The device for recovering and utilizing residual heat of electrolytic aluminum stub anode according to claim 1, characterized in that, The adjusting valve is an electric butterfly valve.

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