Low-temperature vacuum cracking furnace

Abstract

The utility model discloses a low-temperature vacuum cracking furnace and relates to the technical field of lithium battery cracking. Comprising a low-temperature oxygen-free pyrolyzing furnace, a feeding bin is installed on one side of the top of the low-temperature oxygen-free pyrolyzing furnace, a dust remover is installed on the other side of the top of the low-temperature oxygen-free pyrolyzing furnace, an exhaust port of the dust remover is connected with an air inlet pipe through a connecting pipe, the air inlet pipe communicates with a recovery tower, and the air inlet pipe is introduced from the center of the bottom of the recovery tower and rotationally connected with a rotating connector; a gas ejector pipe with a gas ejector head at the top is mounted on the outer wall of the rotating joint, the gas ejector pipe is located below the liquid level of the recovery liquid in the recovery tower, a rotating shaft is fixedly connected to the top end of the rotating joint, a spiral blade is arranged on the rotating shaft and driven by external force to enable the gas ejector pipe to rotate, and a spraying pipe is arranged on one side of the top of the recovery tower. According to the low-temperature vacuum cracking furnace, the recovery tower is arranged, so that harmful substances such as dioxin contained in waste gas can be recovered and treated after the dust remover is used for removing dust of the waste gas, and safe and harmless flue gas can be discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery cracking, in particular to a low-temperature vacuum cracking furnace. Background Art

[0002] With the increasing use of lithium batteries, the internal working ions of lithium batteries will lose their activity after nearly a thousand charge and discharge cycles. The increasingly wide range of lithium ion use will inevitably bring a large number of waste batteries. If they are discarded at will, it will not only pose a threat to the environment, but also a waste of resources. Therefore, lithium batteries are processed through cleavage.

[0003] During the cracking process of lithium batteries, the exhaust gas is usually filtered through a bag filter for dust removal before being discharged. Since lithium batteries are processed in an oxygen-free manner, toxic substances such as dioxins will be generated during the cracking process. If measures are not taken to remove dioxins and other toxic substances, it will harm the environment. Utility Model Content

[0004] The utility model provides a low-temperature vacuum cracking furnace to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature vacuum cracking furnace, comprising a low-temperature oxygen-free pyrolysis furnace, a feed bin is installed on one side of the top of the low-temperature oxygen-free pyrolysis furnace, a dust collector is installed on the other side of the top of the low-temperature oxygen-free pyrolysis furnace, the exhaust port of the dust collector is connected to an air intake pipe through a connecting pipe, the air intake pipe is connected to a recovery tower, the air intake pipe is introduced from the bottom center of the recovery tower and is rotatably connected to a rotating joint, an air jet pipe with an air jet head on the top is installed on the outer wall of the rotating joint, the air jet pipe is located below the liquid level of the recovery liquid in the recovery tower, the top of the rotating joint is fixedly connected to a rotating shaft, the rotating shaft is provided with spiral blades, the spiral blades are driven by external force to make the air jet pipe rotate, and a spray pipe is provided on one side of the top of the recovery tower.

[0006] Furthermore, a guide tube is fixedly provided in the inner cavity of the recovery tower, and a conical ventilation groove is opened on the guide tube.

[0007] Furthermore, a porous plate is installed in the inner cavity of the ventilation groove.

[0008] Furthermore, a filling frame filled with adsorption filler is provided in the inner cavity of the recovery tower between the spray pipe and the guide tube.

[0009] Furthermore, a wire mesh demister is installed at the top of the inner cavity of the recovery tower.

[0010] Furthermore, the bottom of the recovery tower is conical.

[0011] Furthermore, the dust collector is a bag dust collector.

[0012] Compared with the prior art, the utility model provides a low-temperature vacuum cracking furnace having the following beneficial effects: the low-temperature vacuum cracking furnace, by setting a recovery tower, can recover and treat harmful substances such as dioxins contained in the exhaust gas after the dust collector has completed dust removal of the exhaust gas, so as to discharge safe and harmless flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of a recovery tower of the utility model;

[0015] Figure 3 It is a side view structural schematic diagram of the low-temperature oxygen-free cracking furnace of the utility model;

[0016] Figure 4 It is a schematic diagram of the top view of the low-temperature oxygen-free pyrolysis furnace of the utility model.

[0017] In the figure: 1. Low-temperature oxygen-free pyrolysis furnace; 2. Feed bin; 3. Dust collector; 4. Recovery tower; 5. Air inlet pipe; 6. Rotating joint; 7. Jet pipe; 8. Rotating shaft; 9. Spiral blade; 10. Guide tube; 11. Perforated plate; 12. Filling rack; 13. Spray pipe; 14. Wire mesh demister. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4The utility model discloses a low-temperature vacuum cracking furnace, comprising a low-temperature oxygen-free pyrolysis furnace 1, a feed bin 2 is installed on one side of the top of the low-temperature oxygen-free pyrolysis furnace 1, a dust collector 3 is installed on the other side of the top of the low-temperature oxygen-free pyrolysis furnace 1, the exhaust port of the dust collector 3 is connected to an air intake pipe 5 through a connecting pipe, the air intake pipe 5 is connected to a recovery tower 4, the air intake pipe 5 is introduced from the bottom center of the recovery tower 4 and is rotatably connected to a rotating joint 6, an air injection pipe 7 with an air injection head on the top is installed on the outer wall of the rotating joint 6, the air injection pipe 7 is located below the liquid level of the recovery liquid in the recovery tower 4, a rotating shaft 8 is fixedly connected to the top of the rotating joint 6, a spiral blade 9 is arranged on the rotating shaft 8, the spiral blade 9 is driven by an external force to make the air injection pipe 7 rotate, and a spray pipe 13 is arranged on one side of the top of the recovery tower 4.

[0020] The dust collector 3 is a bag dust collector.

[0021] The low-temperature oxygen-free pyrolysis furnace 1 is connected with a pipeline for conveying nitrogen.

[0022] Specifically, a guide tube 10 is fixedly provided in the inner cavity of the recovery tower 4 , and a conical ventilation groove is opened on the guide tube 10 .

[0023] In this embodiment, when the spray pipe 13 sprays the recovery liquid, the recovery liquid will flow downward along the inner wall of the ventilation groove and fall on the spiral blade 9, so that the spiral blade 9 is replaced and rotates, and then drives the rotating joint 6 and the injection pipe 7 to rotate. The injection pipe 7 located below the liquid level of the recovery liquid accumulated at the bottom of the inner cavity of the recovery tower 4 can evenly distribute the gas, so that the waste gas and the recovery liquid are mixed.

[0024] Specifically, a porous plate 11 is installed in the inner cavity of the ventilation groove.

[0025] In this embodiment, the provision of the porous plate 11 is conducive to uniform dispersion of the exhaust gas flowing upward so as to allow it to contact with the recovery liquid sprayed downward.

[0026] Specifically, the inner cavity of the recovery tower 4 is provided with a filling frame 12 filled with adsorption filling material between the spray pipe 13 and the guide tube 10 .

[0027] In this embodiment, the adsorption filler is used to adsorb harmful substances in the exhaust gas.

[0028] Specifically, a wire mesh demister 14 is installed at the top of the inner cavity of the recovery tower 4 .

[0029] In this embodiment, the wire mesh demister 14 reduces the moisture contained in the exhaust gas discharged from the recovery tower 4.

[0030] Specifically, the bottom of the recovery tower 4 is conical.

[0031] In this embodiment, the bottom of the recovery tower 4 is conical, which is conducive to the discharge of the recovery liquid.

[0032] In summary, the low-temperature vacuum cracking furnace, by providing the recovery tower 4, can recover and treat harmful substances such as dioxins contained in the exhaust gas after the dust collector 3 has completed dust removal of the exhaust gas, so as to discharge safe and harmless flue gas.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature vacuum cracking furnace, comprising a low-temperature oxygen-free pyrolysis furnace (1), Features: A feed bin (2) is installed on one side of the top of the low-temperature oxygen-free pyrolysis furnace (1), and a dust collector (3) is installed on the other side of the top of the low-temperature oxygen-free pyrolysis furnace (1). The exhaust port of the dust collector (3) is connected to an air intake pipe (5) through a connecting pipe. The air intake pipe (5) is connected to a recovery tower (4). The air intake pipe (5) is introduced from the bottom center of the recovery tower (4) and is rotatably connected to a rotating joint (6). An air injection pipe (7) with an air injection head on the top is installed on the outer wall of the rotating joint (6). The air injection pipe (7) is located below the liquid level of the recovery liquid in the recovery tower (4). The top of the rotating joint (6) is fixedly connected to a rotating shaft (8). A spiral blade (9) is provided on the rotating shaft (8). The spiral blade (9) is driven by an external force to rotate the air injection pipe (7). A spray pipe (13) is provided on one side of the top of the recovery tower (4).

2. A low temperature vacuum cracking furnace according to claim 1, Features: A guide tube (10) is fixedly arranged in the inner cavity of the recovery tower (4), and a conical ventilation groove is provided on the guide tube (10).

3. A low temperature vacuum cracking furnace according to claim 2, Features: A porous plate (11) is installed in the inner cavity of the ventilation groove.

4. A low temperature vacuum cracking furnace according to claim 2, Features: The inner cavity of the recovery tower (4) is located between the spray pipe (13) and the guide tube (10) and is provided with a filling frame (12) filled with adsorption filling material.

5. A low temperature vacuum cracking furnace according to claim 1, Features: A wire mesh demister (14) is installed at the top of the inner cavity of the recovery tower (4).

6. A low temperature vacuum cracking furnace according to claim 1, Features: The bottom of the recovery tower (4) is conical.

7. A low temperature vacuum cracking furnace according to claim 1, Features: The dust collector (3) is a bag dust collector.

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