Recombustion chamber

Abstract

The utility model provides a recombustion chamber which comprises a recombustion chamber body and a pipe plug, and the recombustion chamber body is provided with an air inlet pipeline and an air outlet pipeline; the air inlet pipeline comprises a first branch pipe and a second branch pipe, the lower end of the first branch pipe is connected with the recombustion chamber body, and one end of the second branch pipe is connected with the side wall of the first branch pipe; the pipe plug is inserted into the first branch pipe from the opening in the upper end of the first branch pipe and plugs the opening in the upper end of the first branch pipe; the pipe plug can be inserted downwards to plug a connecting opening in the connecting position of the first branch pipe and the second branch pipe. And a connector at the joint of the first branch pipe and the second branch pipe can be plugged or opened through the pipe plug. By plugging the connector, communication between the second branch pipe and the first branch pipe can be blocked, tail gas is prevented from entering the graphitization furnace from the second branch pipe, carbon dioxide and water in the tail gas are further prevented from entering the graphitization furnace to cause oxidation of an electrode in the furnace body, and the service life of the electrode can be effectively prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of graphitization furnaces, and in particular to an afterburning chamber. Background Art

[0002] Graphitized powder is a crucial industrial material, primarily used as a recarburizer in steel and iron metallurgy, as cathode carbon blocks and prebaked anodes for nonferrous metal electrolytic cells, and as diamond products. The most widely used graphitization furnace is a vertical graphite resistance furnace, which heats the raw material using upper and lower graphite blocks. The principle is that after the raw material passes through the electric field between the positive and negative electrodes, the resistance of the material generates heat when electricity is applied, subjecting the material to high-temperature treatment.

[0003] The afterburner is typically used to treat combustible gases generated during the graphitization process. During graphitization furnace operation, combustible gases are introduced into the afterburner through an inlet pipe. Inside the afterburner, these gases mix with air and ignite, leading to a combustion reaction. The heat generated by combustion is absorbed by the furnace, maintaining the high temperature of the graphitization furnace. Meanwhile, the exhaust gases are discharged through an exhaust pipe.

[0004] In actual production, in order to improve production efficiency, multiple graphitization furnaces usually work together. Each graphitization furnace is equipped with a reburning chamber. The exhaust pipes of these reburning chambers are connected to a main exhaust pipe. The exhaust gas generated by the combustion of combustible gas in each reburning chamber is collected in the main exhaust pipe and discharged together.

[0005] However, when one of the graphitization furnaces is shut down so that combustible gas is no longer produced in the furnace, the exhaust gas in the main exhaust pipe will flow into the closed graphitization furnace. The main components of these exhaust gases are carbon dioxide and water produced by the combustion of combustible gas. This water enters the graphitization furnace and generates water vapor in the furnace body, causing oxidation of the electrodes in the furnace body and affecting the service life of the electrodes. Utility Model Content

[0006] The embodiment of the present application provides a reburning chamber, comprising a reburning chamber body and a pipe plug, wherein the reburning chamber body has an air inlet pipe and an air outlet pipe;

[0007] The air intake duct includes a first branch pipe and a second branch pipe, wherein the lower end of the first branch pipe is connected to the afterburning chamber body, and one end of the second branch pipe is connected to the side wall of the first branch pipe;

[0008] The pipe plug is inserted into the first branch pipe through the opening at the upper end of the first branch pipe to seal the opening at the upper end of the first branch pipe;

[0009] The pipe plug can be inserted downward to block the connection port between the first branch pipe and the second branch pipe.

[0010] The afterburning chamber provided in the embodiments of the present application can be sealed or opened using a pipe plug at the connection between the first branch pipe and the second branch pipe. By sealing this connection, the second branch pipe is blocked from communicating with the first branch pipe, preventing exhaust gas from entering the graphitization furnace through the second branch pipe. This, in turn, prevents carbon dioxide and water in the exhaust gas from entering the graphitization furnace and causing oxidation of the electrodes within the furnace body, effectively extending the service life of the electrodes.

[0011] In one possible embodiment, in the afterburning chamber provided in an embodiment of the present application, a through-limiting hole is provided on the side wall of the pipe plug, a limiting rod is passed through the limiting hole, and two ends of the limiting rod pass through opposite sides of the pipe plug;

[0012] The length of the limiting rod is greater than the radial dimension of the opening at the upper end of the first branch pipe.

[0013] In one possible embodiment, in the afterburning chamber provided in an embodiment of the present application, a limiting head is provided at one end of the limiting rod, and an outer diameter of the limiting head is larger than an aperture of the limiting hole;

[0014] The other end of the limiting rod is provided with a through insertion hole, and a limiting bolt is passed through the insertion hole.

[0015] In one possible implementation manner, in the afterburning chamber provided in an embodiment of the present application, the first branch pipe has a tapered section, and an inner diameter of the first branch pipe at the tapered section gradually decreases toward a lower end of the first branch pipe;

[0016] The outer wall surface of the pipe plug near the lower end has a tapered surface, and the tapered surface can fit with the inner pipe wall of the first branch pipe located at the tapered section.

[0017] In one possible implementation manner, in the afterburning chamber provided in an embodiment of the present application, a handle is provided on the top end of the pipe plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 Schematic diagram of the structure of the afterburning chamber provided in an embodiment of the present application;

[0020] Figure 2 1 is a schematic top view of a reburning chamber provided in an embodiment of the present application;

[0021] Figure 3This is a schematic diagram of an explosion in a re-ignition chamber provided in an embodiment of the present application;

[0022] Figure 4 yes Figure 3 A magnified schematic diagram of point A in the middle;

[0023] Figure 5 Schematic diagram of the second branch pipe being connected to the first branch pipe;

[0024] Figure 6 Schematic diagram showing that the second branch pipe is not connected to the first branch pipe.

[0025] Description of Reference Numerals

[0026] 10- afterburning chamber body;

[0027] 20-intake pipe;

[0028] 21-first branch;

[0029] 211-cone segment;

[0030] 22-second branch;

[0031] 30- outlet pipe;

[0032] 40-pipe plug;

[0033] 41-limiting hole;

[0034] 42-cone surface;

[0035] 43-handle;

[0036] 50-limiting rod;

[0037] 51-limiting head;

[0038] 52-jack;

[0039] 60-Limit bolt. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] Figure 1 Schematic diagram of the structure of the afterburning chamber provided in an embodiment of the present application; Figure 2 1 is a schematic top view of a reburning chamber provided in an embodiment of the present application; Figure 3 This is a schematic diagram of an explosion in a re-ignition chamber provided in an embodiment of the present application; Figure 4 yes Figure 3 A magnified schematic diagram of point A in the middle; Figure 5 Schematic diagram of the second branch pipe being connected to the first branch pipe; Figure 6 Schematic diagram showing that the second branch pipe is not connected to the first branch pipe.

[0042] See also Figures 1 to 6 As shown, the embodiment of the present application provides a reburning chamber, including a reburning chamber body 10 and a pipe plug 40, the reburning chamber body 10 has an air inlet pipe 20 and an air outlet pipe 30, wherein:

[0043] The air intake duct 20 is used to connect the afterburning chamber body 10 and the combustible gas exhaust channel of the graphitization furnace. The air intake duct 20 includes a first branch pipe 21 and a second branch pipe 22. The lower end of the first branch pipe 21 is connected to the afterburning chamber body 10. One end of the second branch pipe 22 is connected to the side wall of the first branch pipe 21. The other end of the second branch pipe 22 serves as the combustible gas inlet connected to the graphitization furnace.

[0044] The gas outlet pipe 30 is connected to the main exhaust pipe, and is used to discharge the tail gas rich in carbon dioxide and water generated by the combustion of the combustible gas into the main exhaust pipe for subsequent centralized treatment of the tail gas.

[0045] The pipe plug 40 is inserted into the first branch pipe 21 through the opening at the upper end thereof, thereby blocking the opening at the upper end of the first branch pipe 21, preventing the combustible gas and the gas within the reburning chamber body 10 from being discharged through the opening at the upper end of the first branch pipe 21. The pipe plug 40 is inserted downwardly and blocks the connection between the first branch pipe 21 and the second branch pipe 22, thereby blocking the communication between the second branch pipe 22 and the first branch pipe 21.

[0046] How it works:

[0047] During normal operation of the graphitization furnace, the pipe plug 40 is inserted into the first branch pipe 21 through the opening at the upper end thereof, thereby sealing the opening. However, the connection between the first branch pipe 21 and the second branch pipe 22 is not blocked, and the second branch pipe 22 and the first branch pipe 21 remain in communication. In this manner, the combustible gas generated during operation of the graphitization furnace passes through the second branch pipe 22 and the first branch pipe 21 and enters the reburning chamber body 10, where it undergoes a combustion reaction. Simultaneously, the combustible gas and the gas within the reburning chamber body 10 are not discharged through the opening at the upper end of the first branch pipe 21.

[0048] When the graphitization furnace needs to be shut down, the pipe plug 40 is lowered along the first branch pipe 21 to block the connection between the first branch pipe 21 and the second branch pipe 22, thereby blocking the connection between the second branch pipe 22 and the first branch pipe 21. The second branch pipe 22 is disconnected from the first branch pipe 21. At this time, the exhaust gas in the main exhaust pipe cannot enter the second branch pipe 22 through the first branch pipe 21, thereby preventing the carbon dioxide and water in the exhaust gas from entering the graphitization furnace through the second branch pipe 22.

[0049] The afterburning chamber provided in the embodiment of the present application can block or open the connection between the first branch pipe 21 and the second branch pipe 22 by using a pipe plug 40. By blocking this connection, the second branch pipe 22 is blocked from communicating with the first branch pipe 21, preventing the exhaust gas from entering the graphitization furnace through the second branch pipe 22. This further prevents carbon dioxide and water in the exhaust gas from entering the graphitization furnace and causing oxidation of the electrodes inside the furnace body, effectively extending the service life of the electrodes.

[0050] In the embodiment of the present application, a through-hole 41 is provided on the side wall of the pipe plug 40 , into which a limiting rod 50 can be inserted. The length of the limiting rod 50 is greater than the radial dimension of the opening at the upper end of the first branch pipe 21 .

[0051] During normal operation of the graphitization furnace, the tube plug 40 must remain within the first branch tube 21 but not block the connection between the first branch tube 21 and the second branch tube 22, ensuring that the second branch tube 22 is in communication with the first branch tube 21. Therefore, a stopper rod 50 is inserted through the stopper hole 41, with both ends of the stopper rod 50 extending from opposite sides of the tube plug 40. This prevents the tube plug 40 from falling, maintaining communication between the second branch tube 22 and the first branch tube 21.

[0052] Specifically, a stopper 51 is provided at one end of the stopper rod 50. The outer diameter of the stopper head 51 is larger than the diameter of the stopper hole 41. A through-hole 52 is provided at the other end of the stopper rod 50. A stopper pin 60 is inserted into the through-hole 52. The stopper head 51 and the stopper pin 60 inserted into the through-hole 52 limit the axial displacement of the stopper rod 50, preventing the stopper rod 50 from slipping out of the stopper hole 41.

[0053] Specifically, the first branch pipe 21 has a tapered section 211, and the inner diameter of the first branch pipe 21 at the tapered section 211 gradually decreases toward the lower end of the first branch pipe 21. The outer wall surface of the pipe plug 40 near the lower end has a tapered surface 42, which can fit the inner wall of the first branch pipe 21 at the tapered section 211.

[0054] In this way, when it is necessary to lower the pipe plug 40 along the first branch pipe 21 to block the connection between the first branch pipe 21 and the second branch pipe 22, thereby blocking the communication between the second branch pipe 22 and the first branch pipe 21, the stopper rod 50 is removed, and the pipe plug 40 is allowed to fall along the first branch pipe 21 until the conical surface 42 of the pipe plug 40 contacts the inner wall of the first branch pipe 21 at the conical section 211. The pipe plug 40 then stops falling, and the pipe plug 40 is maintained in the position of blocking the connection between the first branch pipe 21 and the second branch pipe 22.

[0055] Specifically, a handle 43 is provided at the top of the pipe plug 40, so that it is more convenient to use the handle 43 to lift or put down the pipe plug 40.

[0056] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In the description of this application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0057] The terms "first," "second," "third," "fourth," etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A recombustion chamber, characterized in that: It includes a reburning chamber body and a pipe plug, wherein the reburning chamber body has an air inlet pipe and an air outlet pipe; The air intake duct includes a first branch pipe and a second branch pipe, wherein the lower end of the first branch pipe is connected to the afterburning chamber body, and one end of the second branch pipe is connected to the side wall of the first branch pipe; The pipe plug is inserted into the first branch pipe through the opening at the upper end of the first branch pipe to seal the opening at the upper end of the first branch pipe; The pipe plug can be inserted downward to block the connection port between the first branch pipe and the second branch pipe.

2. The afterburning chamber according to claim 1, characterized in that The side wall of the pipe plug is provided with a through-limiting hole, a limiting rod is passed through the limiting hole, and two ends of the limiting rod pass through opposite sides of the pipe plug; The length of the limiting rod is greater than the radial dimension of the opening at the upper end of the first branch pipe.

3. The afterburning chamber according to claim 2, characterized in that A limiting head is provided at one end of the limiting rod, and the outer diameter of the limiting head is larger than the aperture of the limiting hole; The other end of the limiting rod is provided with a through insertion hole, and a limiting bolt is passed through the insertion hole.

4. The afterburning chamber according to claim 1, characterized in that The first branch pipe has a tapered section, and the inner diameter of the first branch pipe at the tapered section gradually decreases toward the lower end of the first branch pipe; The outer wall surface of the pipe plug near the lower end has a tapered surface, and the tapered surface can fit with the inner pipe wall of the first branch pipe located at the tapered section.

5. The afterburning chamber according to any one of claims 1 to 4, characterized in that: The top end of the pipe plug is provided with a handle.

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