Treatment device for high temperature electric calcination flue gas from waste cathode of aluminum electrolysis

Abstract

The present invention relates to the field of electrolytic waste treatment, and in particular to a device for treating high-temperature electrocalcined flue gas from waste cathodes of aluminum electrolysis. The device for treating high-temperature electrocalcined flue gas from waste cathodes of aluminum electrolysis comprises a shell and a cooling part; the cooling part comprises a cooling tube group and a cooling plate group, the cooling tube group is arranged on the inner side wall of the shell, and the cooling plate group is arranged on the inner top wall and inner bottom wall of the shell; a flue gas inlet, a flue gas outlet and an ash discharge port are arranged on the shell, the flue gas inlet and the flue gas outlet are arranged on the side wall of the shell, and the ash discharge port is arranged at the bottom of the shell. The device for treating high-temperature electrocalcined flue gas from waste cathodes of aluminum electrolysis provided by the present invention can form a temperature gradient cavity between the high-temperature flue gas port and the high-temperature flue gas port by arranging a cooling tube group and a cooling plate group in the shell, and the high-temperature flue gas in a gas-liquid mixed state is converted into granular, flaky or powdery solids in the temperature gradient cavity, which will not adhere to the high-temperature flue gas port or the inner wall of the shell, and can effectively ensure the smooth flow of the flue gas channel.

Description

Technical Field

[0001] The invention relates to the field of electrolytic waste treatment, and in particular to a device for treating high-temperature electric calcination flue gas from aluminum electrolytic waste cathodes. Background Art

[0002] The high-temperature harmless disposal and resource utilization of aluminum electrolysis waste cathode technology is one of the difficult problems that are difficult to overcome at present. Each process link has its own corresponding branch problems, so a reliable industrial production line has not yet been formed.

[0003] Among them, the flue gas generated by the high-temperature disposal of waste cathodes from aluminum electrolysis will overflow from the high-temperature flue gas outlet of the kiln. The gaseous and molten liquid electrolytes and impurities will form compaction on the wall panels around the flue gas channel, and sometimes even form icy compaction at the high-temperature flue gas outlet, causing the flue gas channel to be blocked.

[0004] The existing technology is to mix the 1200℃ to 1700℃ waste cathode high-temperature flue gas generated by calcining aluminum electrolysis waste cathode with external gas, and reduce the temperature of the flue gas to below 800℃. The flow rate ratio of the high-temperature flue gas to the external gas is 1:2 to 1:10, and the volume ratio is 1:3 to 1:15. In this technology, the use of external gas mixing cooling and temperature reduction technology has a certain effect on alleviating the hardening of the high-temperature flue gas of the aluminum electrolysis waste cathode, but it cannot effectively cure the formation of ice-like hardening of gaseous and molten liquid electrolytes and impurities at the high-temperature flue gas outlet, that is, in the flue gas channel between 1200℃ and 800℃.

[0005] In addition, there is another way to mix other carbon raw materials with the waste cathode of aluminum electrolysis, that is, to dilute the content of the waste cathode and then use a high-temperature method for comprehensive utilization, directly avoiding the high-concentration waste cathode high-temperature flue gas, that is, in a sense, indirectly solving or alleviating the problem of high-concentration waste cathode high-temperature flue gas sticking to the wall, but this method of treating waste cathodes is very inefficient. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a treatment device for high-temperature electrocalcined flue gas from aluminum electrolysis waste cathodes, which can effectively prevent the formation of agglomeration of high-temperature electrocalcined flue gas from aluminum electrolysis waste cathodes, thereby preventing the flue gas channel from being blocked.

[0007] The present invention provides a device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis, comprising a shell and a cooling part; the cooling part comprises a cooling tube group and a cooling plate group, the cooling tube group is arranged on the inner side wall of the shell, and the cooling plate group is arranged on the inner top wall and the inner bottom wall of the shell; the shell is provided with a high-temperature flue gas inlet, a flue gas outlet and an ash discharge port, the high-temperature flue gas inlet and the flue gas outlet are arranged on the side wall of the shell, and the ash discharge port is arranged at the bottom of the shell.

[0008] Furthermore, the cooling tube group includes a plurality of cooling tubes, and the plurality of cooling tubes are arranged on the inner side wall of the shell along the height direction.

[0009] Furthermore, the cooling plate group includes a first cooling plate and a second cooling plate, the first cooling plate is arranged on the inner top wall of the shell, and the second cooling plate is arranged on the inner bottom wall of the shell.

[0010] Furthermore, the first cooling plate and the second cooling plate are in fluid communication with a plurality of cooling pipes.

[0011] Furthermore, a coolant inlet and a coolant outlet are also provided on the shell, and the coolant inlet and the coolant outlet are connected to the first cooling disk, the second cooling disk and the plurality of cooling pipes.

[0012] Furthermore, at least one coolant exhaust valve is provided on the cooling tube assembly and / or the cooling disc assembly.

[0013] Furthermore, a sealing valve is provided at the position of the ash discharge port, and the ash discharge port corresponds to the center of the annular space surrounded by the cooling pipe group.

[0014] Furthermore, a smoke pipe is provided on the high-temperature smoke inlet, and the smoke pipe extends into the annular space surrounded by the cooling tube group, and the length of the extending section of the smoke pipe is less than half of the width of the annular space.

[0015] Furthermore, an insulating sealing ring is provided between the smoke pipe and the shell.

[0016] Furthermore, the shell includes a sealing steel plate, a heat-insulating layer and a fire-resistant layer which are arranged in sequence from the outside to the inside.

[0017] The device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis provided by the present invention is provided with a cooling tube group and a cooling plate group in a shell, and the high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis is passed into the shell, so that a temperature gradient cavity is formed between the cooling tube group and the cooling plate group and the high-temperature flue gas outlet, and the high-temperature flue gas enters the temperature gradient cavity in a gas-liquid mixed state, and is transformed into a granular, flaky or powdery solid in the temperature gradient cavity. The solid is non-sticky and will not adhere to and harden inside the shell, and can fall by itself and be discharged from the ash discharge port, thereby effectively solving the problem of hardening, wall hanging and blockage of flue gas passage of high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis. In addition, the refractory layer, thermal insulation layer and sealing steel plate structure of the shell from the inside to the outside not only ensure the low-temperature safety of the shell surface, but also ensure the safety and reliability of smoke leakage. The device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis of the present invention is not only simple and practical, but also has the advantages of low cost and safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a device for treating high-temperature electric calcination flue gas from waste cathodes from aluminum electrolysis provided by an embodiment of the present invention;

[0019] Figure 2 A schematic cross-sectional view of a device for treating high-temperature electric calcination flue gas from spent cathodes from aluminum electrolysis provided in an embodiment of the present invention.

[0020] Description of Figure Numbers:

[0021] 100. Shell; 102. High-temperature flue gas inlet; 104. Flue gas outlet; 106. Ash discharge port; 108. Cooling pipe; 110. First cooling plate; 112. Second cooling plate; 114. Coolant inlet; 116. Coolant outlet; 118. Coolant exhaust valve; 120. Sealing valve; 122. Insulating sealing ring; 124. Flue gas pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the invention clearer, the technical solution in the invention will be clearly described below in conjunction with the drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] like Figure 1 to Figure 2 As shown, the present invention provides a device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis, comprising a shell 100 and a cooling part; the cooling part comprises a cooling tube group and a cooling plate group, the cooling tube group is arranged on the inner side wall of the shell 100, and the cooling plate group is arranged on the inner top wall and the inner bottom wall of the shell 100; the shell 100 is provided with a high-temperature flue gas inlet 102, a flue gas outlet 104 and an ash discharge port 106, the high-temperature flue gas inlet 102 and the flue gas outlet 104 are arranged on the side wall of the shell 100, and the ash discharge port 106 is arranged at the bottom of the shell 100.

[0028] The device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis provided by the present invention can form a gradient temperature cavity between the cooling tube group and the cooling disk group and the high-temperature flue gas inlet 102 by arranging a cooling tube group and a cooling disk group in the shell 100, and passing the high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis into the shell 100, so as to cool the introduced high-temperature flue gas, and then transform the high-temperature flue gas in the gas-liquid mixed state into granular, flaky or powdery solids in the gradient temperature cavity. Since the solid is non-sticky, the solid after cooling will not adhere to and harden inside the shell 100, but can fall by itself and be discharged from the ash discharge port 106, so as to effectively solve the problem of hardening, wall hanging and blockage of flue gas passage of high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis. The device for treating high-temperature electric calcination flue gas from waste cathode of aluminum electrolysis of the present invention is not only simple and practical, but also has the advantages of low cost and safe use.

[0029] The shell 100 in the embodiment of the present invention includes a multi-layer structure. Specifically, the shell 100 includes a sealing steel plate, a heat-insulating layer and a fire-resistant layer in sequence from the outside to the inside.

[0030] Among them, the sealing steel plate is used to improve the sealing performance of the shell 100, prevent the leakage of high-temperature electric calcination flue gas from aluminum electrolysis waste cathode, and at the same time improve the structural strength of the shell 100; the insulation layer is used to prevent the cooling amount of the cooling tube group and the cooling plate group from leaking out, for example, the insulation layer can be made of a lightweight insulation material with a small thermal conductivity; the refractory layer is used to prevent the inside of the shell 100 from being damaged by the high temperature of the high-temperature electric calcination flue gas from aluminum electrolysis waste cathode, for example, the refractory layer can be made of an inorganic non-metallic material.

[0031] In addition, it should be noted that the housing 100 in the embodiment of the present invention may be rectangular, circular, etc., and no specific limitation is made herein.

[0032] The housing 100 is provided with a high-temperature flue gas inlet 102 , a flue gas outlet 104 and an ash discharge port 106 .

[0033] Furthermore, a flue gas pipe 124 is provided on the high-temperature flue gas inlet 102, and the flue gas pipe 124 extends into the annular space surrounded by the cooling tube group, and the length of the extending section of the flue gas pipe 124 is less than half of the width of the annular space. In other words, the extending section of the flue gas pipe 124 extending into the annular space extends into the annular space from the left side of the shell 100, and the distance between the end of the extending section and the cooling tube group on the right side thereof is greater than the distance between the end of the extending section and the cooling tube group on the left side thereof. Preferably, the length of the extending section may be about one third of the width of the shell 100.

[0034] Among them, the high-temperature flue gas inlet 102 is the high-temperature air inlet of the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode. Further, an insulating sealing ring 122 is also provided at the position of the high-temperature flue gas inlet 102, that is, between the flue gas pipe 124 and the shell 100. By providing the insulating sealing ring 122, it can both electrically insulate and prevent the high temperature of the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode from leaking out, thereby preventing the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode from polluting the environment. In addition, it should be noted that the temperature of the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode entering the shell 100 is usually controlled between 1100°C and 1700°C, so the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode entering the shell 100 usually enters the shell 100 in a gas-liquid mixed state, and after being processed by the processing device, the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode in a gas-liquid mixed state is converted into a granular, flaky or powdery solid and discharged.

[0035] The smoke pipe 124 is also made of high temperature resistant material. The reason why the length of the extension section of the smoke pipe 124 is set to be less than half of the width of the annular space is to ensure that the high temperature electric calcination smoke of the aluminum electrolysis waste cathode entering the annular space, i.e., the temperature gradient cavity, can be sufficiently gradient cooled and converted into granular, flaky or powdery solids, and will not stick to the port of the smoke pipe 124 or the inner wall of the housing 100.

[0036] The flue gas outlet 104 is the outlet of the treated aluminum electrolysis waste cathode high temperature electric calcination flue gas. After treatment, the aluminum electrolysis waste cathode high temperature electric calcination flue gas has been converted into low temperature gas. Further, a filtering device or a collecting device can be set along the outlet to once again filter the impurities in the treated aluminum electrolysis waste cathode high temperature electric calcination flue gas, and at the same time, solid particles in the treated aluminum electrolysis waste cathode high temperature electric calcination flue gas can be further collected.

[0037] The ash discharge port 106 is used to discharge the granular, flake or powdery solids converted from the high temperature electric calcination flue gas of the aluminum electrolysis waste cathode. Furthermore, in order to prevent the granular, flake or powdery solids from secondary pollution to the environment, a sealing valve 120 is also provided at the position of the ash discharge port 106. The sealing valve 120 can use a spherical electric sealing valve or other components.

[0038] Furthermore, the ash discharge port 106 corresponds to the center of the annular space surrounded by the cooling tube group, so that granular, flaky or powdery solids can be smoothly discharged from the ash discharge port 106 to the outside of the housing 100 .

[0039] Furthermore, in order for the shell 100 to be able to collect granular, flaky or powdery solids, the bottom of the shell 100 is in an inverted cone shape, so that the granular, flaky or powdery solids can fall into the ash discharge port 106 along the inner wall of the inverted cone-shaped shell 100, and then be discharged by the sealing valve 120, and then directly cooled, bagged and collected.

[0040] The cooling part is used to cool the high-temperature electric calcination flue gas of aluminum electrolysis waste cathode, wherein the cooling part includes a cooling tube group and a cooling plate group.

[0041] The cooling tube group is arranged on the inner wall of the shell 100, that is, the cooling tube group is arranged inside the shell 100 along the inner wall of the shell 100. In addition, since the cooling tube group is arranged inside the shell 100, an annular space is formed in the middle of the cooling tube group. As mentioned above, the shape of the shell 100 can be rectangular or circular, so the annular space in the middle of the cooling tube group is adapted to the shape of the shell 100.

[0042] In addition, it should be noted that the annular space can also provide a downward passage for the aforementioned low-temperature granular, flaky or powdered solids (i.e. Figure 1 The channel indicated by the black bold arrow in the middle), that is, the granular, flaky or powdery solids in the shell 100 fall into the ash discharge port 106 through the annular space. Moreover, in the embodiment of the present invention, the temperature gradient from the center of the annular space to the cooling tube group on the inner wall of the shell 100 is about 1100°C to 90°C.

[0043] like Figure 1 and Figure 2 As shown, the cooling tube group includes a plurality of cooling tubes 108, and the plurality of cooling tubes 108 are arranged on the inner side wall of the housing 100. That is, the plurality of cooling tubes 108 are arranged inside the housing 100 along the height direction of the housing 100. In this way, a complete cooling environment is formed in the circumferential direction inside the housing 100, and the aforementioned annular space is also formed.

[0044] Preferably, the lengths of the plurality of cooling tubes 108 are equal, so that a cooling space with a constant temperature environment can be formed. Of course, the cooling tubes 108 can also be configured in the form of cooling jackets, which are not exhaustive here, as long as the cooling effect can be achieved.

[0045] The cooling plate group is arranged on the inner top wall and the inner bottom wall of the shell 100, that is, the cooling plate group is arranged on the top and the bottom of the shell 100, and the cooling plate group also corresponds to the position of the cooling tube group. In this way, a complete cooling space is formed between the cooling tube group and the cooling plate group. When the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode enters the cooling space, it can be quickly cooled, and then the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode can be converted into granular, flaky or powdery solids, and then the granular, flaky or powdery solids can be discharged and collected to achieve harmless treatment of the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode.

[0046] Furthermore, the cooling plate assembly includes a first cooling plate 110 and a second cooling plate 112 . The first cooling plate 110 is disposed on an inner top wall of the housing 100 , and the second cooling plate 112 is disposed on an inner bottom wall of the housing 100 .

[0047] It should be noted that the shapes of the first cooling plate 110 and the second cooling plate 112 are adapted to the shape of the inner wall of the housing 100, and the first cooling plate 110 and the second cooling plate 112 are fluidically connected to the plurality of cooling pipes 108. In this way, a complete cooling space can be formed.

[0048] The so-called inner bottom wall of the shell 100 is not necessarily the bottom of the shell 100 in a strict sense, but corresponds to the length of the multiple cooling tubes 108. For example, if the length of each cooling tube 108 is 10 meters, the distance between the first cooling plate 110 and the second cooling plate 112 can also be 10 meters.

[0049] In addition, in order to correspond to the aforementioned annular space, an opening corresponding to the annular space can be opened in the middle position of the second cooling plate 112, so that granular, flaky or powdered solids can fall into the ash discharge port 106 from the annular space and the opening in the middle position of the second cooling plate 112 in turn.

[0050] Furthermore, a coolant inlet 114 and a coolant outlet 116 are also provided on the shell 100 , and the coolant inlet 114 and the coolant outlet 116 are connected to the first cooling disk 110 , the second cooling disk 112 and the plurality of cooling pipes 108 .

[0051] like Figure 1 As shown, the coolant inlet 114 can be preferably arranged on the bottom surface of the second cooling plate 112, and the coolant outlet 116 can be preferably arranged on the top surface of the first cooling plate 110. In this way, the coolant with a lower temperature can flow into the cooling part from a lower place, and the coolant after heat exchange can flow out from a higher place, which can prevent bubbles from being generated in the coolant, and further prevent bubble cavities from appearing in the cooling tube group or the cooling plate group, and prevent the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode from dry burning the cooling tube group or the cooling plate group, thereby avoiding the cooling tube group or the cooling plate group from being damaged by high temperature, and further ensuring the service life of the treatment device for the high-temperature electric calcination flue gas of the aluminum electrolysis waste cathode.

[0052] The cooling liquid inlet 114 can timely replenish the cooling liquid into the cooling tube group and the cooling plate group, and the cooling liquid can be timely discharged through the cooling liquid outlet 116. For example, the cooling liquid can be water and recycled, which can further reduce the investment cost and operation cost of the treatment device for the high-temperature electric calcination flue gas of aluminum electrolysis waste cathode.

[0053] Furthermore, at least one coolant exhaust valve 118 is provided on the cooling tube group and / or the cooling disc group. Preferably, the coolant exhaust valve 118 is provided at the highest point of the cooling tube group and / or the cooling disc group. In this way, even if bubbles are generated in the coolant, the bubbles can float up. By providing the coolant exhaust valve 118, the gas in the coolant can be discharged in time, ensuring the smooth circulation of the coolant and the uniform and safe exchange of heat energy between the cooling tube group and the cooling disc group.

[0054] In summary, the device for treating high-temperature electrocalcined flue gas from waste cathode of aluminum electrolysis provided in an embodiment of the present invention can form a temperature gradient cavity between the flue gas outlet 104 and the cooling tube group and the cooling disk group by passing the high-temperature electrocalcined flue gas from waste cathode of aluminum electrolysis in a gas-liquid mixed state into a cooling space formed by a cooling tube group and a cooling disk group. At the same time, the high-temperature electrocalcined flue gas from waste cathode of aluminum electrolysis in a gas-liquid mixed state is converted into granular, flaky or powdery solids in the temperature gradient cavity. Since the solids are non-sticky, the solids will not adhere to the inside of the shell 100. In this way, the problems of hardening, wall adhesion and blockage of the flue gas channel by the high-temperature electrocalcined flue gas from waste cathode of aluminum electrolysis are effectively solved.

[0055] In addition, the fire-resistant layer, insulation layer and sealing steel plate structure from the inside to the outside of the shell 100 not only ensure the low-temperature safety of the shell 100 surface, but also ensure the safety and reliability of smoke leakage. The treatment device for high-temperature electric calcination smoke from aluminum electrolysis waste cathode of the present invention is not only simple and practical, but also has the advantages of low cost and safe use.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode, characterized in that: It includes a shell and a cooling part; The cooling part includes a cooling tube group and a cooling plate group, wherein the cooling tube group is arranged on the inner side wall of the shell, and the cooling plate group is arranged on the inner top wall and the inner bottom wall of the shell; The shell is provided with a high-temperature smoke inlet, a smoke outlet and an ash discharge port. The high-temperature smoke inlet and the smoke outlet are arranged on the side wall of the shell, and the ash discharge port is arranged at the bottom of the shell.

2. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 1, characterized in that: The cooling tube group includes a plurality of cooling tubes, and the plurality of cooling tubes are arranged on the inner side wall of the shell along the height direction.

3. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 2, characterized in that: The cooling plate group includes a first cooling plate and a second cooling plate, wherein the first cooling plate is arranged on an inner top wall of the shell, and the second cooling plate is arranged on an inner bottom wall of the shell.

4. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 3, characterized in that: The first cooling plate and the second cooling plate are in fluid communication with a plurality of the cooling tubes.

5. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 3, characterized in that: The shell is also provided with a coolant inlet and a coolant outlet, and the coolant inlet and the coolant outlet are connected with the first cooling disk, the second cooling disk and the plurality of cooling pipes.

6. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 1, characterized in that: At least one coolant exhaust valve is also arranged on the cooling tube assembly and / or the cooling disc assembly.

7. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 1, characterized in that: A sealing valve is also provided at the position of the ash discharge port, and the ash discharge port corresponds to the center of the annular space surrounded by the cooling pipe group.

8. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 1, characterized in that: A flue gas pipe is arranged on the high-temperature flue gas inlet, and the flue gas pipe extends into the annular space surrounded by the cooling tube group, and the length of the extending section of the flue gas pipe is less than half of the width of the annular space.

9. The device for treating high-temperature electric calcination flue gas from aluminum electrolysis waste cathode according to claim 8, characterized in that: An insulating sealing ring is also provided between the smoke pipe and the shell.

10. The device for treating high-temperature electric calcination flue gas from waste cathodes from aluminum electrolysis according to any one of claims 1 to 9, characterized in that: The shell comprises a sealing steel plate, a heat-insulating layer and a fire-resistant layer which are arranged in sequence from the outside to the inside.

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