Recombustion chamber

Abstract

The utility model provides a recombustion chamber which comprises a recombustion chamber body, a stop box and an insertion plate, and the recombustion chamber body is provided with an air inlet pipeline and an air outlet pipeline; a cut-off box is arranged in the middle of the air outlet pipe, a horizontal channel penetrating through the two opposite sides of the cut-off box is arranged in the middle of the cut-off box, an inserting groove is formed in the top end of the cut-off box, and the middle of the inserting groove coincides with the horizontal channel; the gas outlet pipeline comprises a first pipe section and a second pipe section, the first pipe section is connected with the recombustion chamber body and one side of the stop box, the second pipe section is connected with the other side of the stop box, and the first pipe section and the second pipe section both communicate with the horizontal channel; the inserting plate is arranged in the inserting groove in a sliding mode. According to the re-combustion chamber provided by the embodiment of the invention, the horizontal channel can be opened or closed by moving the insertion plate, so that tail gas is prevented from entering the graphitization furnace, carbon dioxide and water in the tail gas are 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 furnace, in particular to a re-combustion chamber. BACKGROUND

[0002] Graphitized powder is mainly used as a carbon additive in steel metallurgy, cathode carbon blocks and pre-baked anodes in non-ferrous metal electrolytic cells, and diamond products, and is a very important industrial material. The existing graphitization furnace widely used is a vertical graphite resistance furnace, which heats the raw materials through the positive and negative graphite blocks arranged above and below. The principle is that after the raw materials pass through the electric field between the positive and negative electrodes, heat is generated due to the electrical resistance of the raw materials after being powered on, and the raw materials are subjected to high-temperature treatment.

[0003] The re-combustion chamber is usually used to treat the combustible gas generated during the graphitization process. During the operation of the graphitization furnace, the combustible gas generated is introduced into the re-combustion chamber through the gas inlet pipe. In the re-combustion chamber, these gases are mixed with air and ignited to undergo a combustion reaction. The heat generated by the combustion is absorbed by the furnace body to maintain the high-temperature state of the graphitization furnace. At the same time, the exhaust gas after combustion is discharged through the exhaust pipe.

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

[0005] However, when one of the graphitization furnaces is closed so that the combustible gas is no longer continuously generated 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 generated by the combustion of combustible gas. The water entering the graphitization furnace will generate steam in the furnace body, causing the electrodes in the furnace body to oxidize and affecting the service life of the electrodes. CONTENT OF THE INVENTION

[0006] The embodiment of the present application provides a re-combustion chamber, which comprises a re-combustion chamber body, a cutoff box and a plug plate, the re-combustion chamber body is provided with a gas inlet pipe and a gas outlet pipe;

[0007] The middle part of the gas outlet pipe is provided with the cutoff box, the middle part of the cutoff box is provided with a horizontal passage penetrating through the opposite sides of the cutoff box, and the top end of the cutoff box is provided with a plug slot, and the middle part of the plug slot coincides with the horizontal passage;

[0008] The gas outlet pipe comprises a first pipe segment and a second pipe segment, one side of the cutoff box and the re-combustion chamber body are connected with the first pipe segment, the other side of the cutoff box is connected with the second pipe segment, and the first pipe segment and the second pipe segment are both in communication with the horizontal passage;

[0009] The plug plate is slidably arranged in the slot.

[0010] The re-combustion chamber can open or close the horizontal passage by moving the plug plate, thereby preventing the tail gas from entering the graphitization furnace, and further preventing the carbon dioxide and water in the tail gas from entering the graphitization furnace to oxidize the electrodes in the furnace body, so that the service life of the electrodes can be effectively prolonged.

[0011] In one possible implementation, the re-combustion chamber includes a refractory plate and a fixing ring, and the fixing ring is wrapped around the outer peripheral wall of the refractory plate.

[0012] In one possible implementation, the re-combustion chamber includes a slot on the side wall of each of the opposite sides of the slot, and the fixing ring has a guide edge on each of the opposite sides, and the guide edge is slidably arranged in the slot.

[0013] In one possible implementation, the re-combustion chamber includes a handle at the top end of the fixing ring.

[0014] In one possible implementation, the re-combustion chamber includes an annular flange on each of the opposite sides of the cutoff box, and the annular flange is arranged around the outer periphery of the horizontal passage.

[0015] The first pipe segment and the second pipe segment are respectively sleeved on the annular flanges on the opposite sides of the cutoff box.

[0016] In one possible implementation, the re-combustion chamber further includes a pipe plug, the gas inlet pipeline includes a first branch pipe and a second branch pipe, the lower end of the first branch pipe is connected to the re-combustion chamber body, and one end of the second branch pipe is connected to the side wall of the first branch pipe.

[0017] The pipe plug is inserted into the first branch pipe through the opening at the upper end of the first branch pipe, and the opening at the upper end of the first branch pipe is blocked.

[0018] The pipe plug can be inserted downward to block the connecting port between the first branch pipe and the second branch pipe.

[0019] In one possible implementation, the re-combustion chamber includes a limiting hole penetrating through the side wall of the pipe plug, a limiting rod is arranged in the limiting hole, and the two ends of the limiting rod are arranged to pass through the opposite sides of the pipe plug.

[0020] The length of the limiting rod is greater than the radial dimension of the opening at the upper end of the first branch pipe.

[0021] In one possible implementation, the re-combustion chamber provided by the embodiments of the present application has a limiting rod, one end of which is provided with a limiting head, and the outer diameter of the limiting head is larger than the hole diameter of the limiting hole.

[0022] The other end of the limiting rod is provided with a through insertion hole, and a limiting pin is arranged in the insertion hole.

[0023] In one possible implementation, the re-combustion chamber provided by the embodiments of the present application has a first branch pipe with a tapered section, and the inner diameter of the first branch pipe at the tapered section gradually decreases towards the lower end of the first branch pipe.

[0024] The outer wall surface of the lower end of the pipe plug has a tapered surface, which can be attached to the inner wall of the first branch pipe at the tapered section.

[0025] In one possible implementation, the re-combustion chamber provided by the embodiments of the present application has a pipe plug, and the top end of the pipe plug is provided with a handle. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a structural schematic diagram of example one;

[0028] Figure 2 is a structural schematic diagram of the cutoff box in example one;

[0029] Figure 3 is a sectional view of the cutoff box in example one;

[0030] Figure 4 is a structural schematic diagram of the plug-in plate in example one;

[0031] Figure 5 is a structural schematic diagram of example two;

[0032] Figure 6 is a structural schematic diagram of the pipe plug in example two;

[0033] Figure 7 is Figure 6 is an enlarged schematic diagram of A in

[0034] Figure 8 is a schematic diagram of the second branch pipe and the first branch pipe in communication;

[0035] Figure 9 Fig. 3 is a schematic view of the second branch pipe in non-communication with the first branch pipe.

[0036] Reference Signs List

[0037] 10 - re-combustion chamber body

[0038] 20 - cut-off box

[0039] 21 - insertion slot

[0040] 22 - horizontal passage

[0041] 23 - sliding slot

[0042] 24 - annular flange

[0043] 30 - insertion plate

[0044] 31 - refractory plate

[0045] 32 - fixing ring

[0046] 321 - guide edge

[0047] 33 - handle

[0048] 40 - air inlet pipe

[0049] 41 - first branch pipe

[0050] 411 - tapered section

[0051] 42 - second branch pipe

[0052] 50 - air outlet pipe

[0053] 51 - first pipe section

[0054] 52 - second pipe section

[0055] 60 - pipe plug

[0056] 61 - limiting hole

[0057] 62 - tapered surface

[0058] 63 - handle

[0059] 70 - limiting rod

[0060] 71 - limiting head

[0061] 72 - insertion hole

[0062] 80 - limiting bolt DETAILED DESCRIPTION

[0063] 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 with reference to the drawings in the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. Embodiments

[0064] Figure 1 is a structural schematic diagram of embodiment one; Figure 2 is a structural schematic diagram of a cutoff box in embodiment one; Figure 3 is a sectional view of the cutoff box in embodiment one; Figure 4 is a structural schematic diagram of an insertion plate in embodiment one.

[0065] Referring to Figures 1 to 4 , the embodiments of the present application provide a reburning chamber, comprising a reburning chamber body 10, a cutoff box 20 and an insertion plate 30, the reburning chamber body 10 has an air inlet pipeline 40 and an air outlet pipeline 50, wherein:

[0066] The air inlet pipeline 40 is used to connect the reburning chamber body 10 and the combustible gas discharge channel of the graphitization furnace, and the air outlet pipeline 50 is communicated with the main exhaust pipeline, and the air outlet pipeline 50 is used to discharge the tail gas rich in carbon dioxide and water generated by the combustion of combustible gas into the main exhaust pipeline for subsequent centralized treatment of the tail gas.

[0067] The middle part of the air outlet pipeline is provided with the cutoff box 20, the middle part of the cutoff box 20 is provided with a horizontal passage 22 penetrating through the opposite sides of the cutoff box 20, the top end of the cutoff box 20 is provided with a slot 21, the slot 21 is used to guide the movement direction of the insertion plate 30 and limit the insertion plate 30, the middle part of the slot 21 coincides with the horizontal passage 22, and the insertion plate 30 is slidably arranged in the slot 21, and the horizontal passage 22 can be opened or closed by moving the insertion plate 30 up and down.

[0068] The air outlet pipeline 50 comprises a first pipeline segment 51 and a second pipeline segment 52, the first pipeline segment 51 is connected with the reburning chamber body 10 and one side of the cutoff box 20, the second pipeline segment 52 is connected with the other side of the cutoff box 20, and the first pipeline segment 51 and the second pipeline segment 52 are both communicated with the horizontal passage 22.

[0069] Principle of use:

[0070] When the graphitization furnace is working normally, the horizontal passage 22 is opened by moving the plug 30 upward, and the combustible gas generated during the working process of the graphitization furnace enters the combustion chamber body 10 through the gas inlet pipe 40 to carry out combustion reaction. The tail gas after combustion is collected and treated by the first pipe section 51, the horizontal passage 22, the second pipe section 52, and the main exhaust pipe.

[0071] When the graphitization furnace needs to be closed, the horizontal passage 22 is closed by putting down the plug 30, so that the tail gas in the main exhaust pipe is prevented from entering the graphitization furnace, thereby avoiding the carbon dioxide and water in the tail gas from entering the graphitization furnace to cause oxidation of the electrodes in the furnace body, and effectively prolonging the service life of the electrodes.

[0072] The combustion chamber provided by the embodiment of the present application can open or close the horizontal passage 22 by moving the plug 30, thereby preventing the tail gas from entering the graphitization furnace, avoiding the carbon dioxide and water in the tail gas from entering the graphitization furnace to cause oxidation of the electrodes in the furnace body, and effectively prolonging the service life of the electrodes.

[0073] Specifically, the plug 30 includes a refractory plate 31 and a fixing ring 32, the fixing ring 32 is buckled on the outer peripheral wall of the refractory plate 31, and the top end of the fixing ring 32 is provided with a handle 33, so that the plug 30 is more conveniently lifted or put down by using the handle 33. The opposite sides of the side wall of the slot 21 are provided with sliding grooves 23, and the opposite sides of the fixing ring 32 are provided with guide edges 321 which are slidably arranged in the sliding grooves 23. Embodiment

[0074] Figure 5 is a structural schematic view of the embodiment two; Figure 6 is a structural schematic view of the pipe plug in the embodiment two; Figure 7 is Figure 6 is an enlarged schematic view of A in the embodiment two; Figure 8 is a schematic view of the second branch pipe and the first branch pipe in the communication state; Figure 9 is a schematic view of the second branch pipe and the first branch pipe in the non-communication state.

[0075] Referring to Figures 5 to 9 On the basis of the embodiment one, the combustion chamber provided by the embodiment of the present application is additionally provided with a pipe plug 60, the opening and closing of the gas inlet pipe 40 can be controlled by the pipe plug 60, and the tail gas is better prevented from entering the graphitization furnace, wherein:

[0076] The gas inlet pipe 40 includes a first branch pipe 41 and a second branch pipe 42, the lower end of the first branch pipe 41 is connected with the combustion chamber body 10, one end of the second branch pipe 42 is connected with the side wall of the first branch pipe 41, and the other end of the second branch pipe 42 serves as a combustible gas inlet connected with the graphitization furnace.

[0077] The pipe plug 60 is inserted into the first branch pipe 41 through the opening at the upper end of the first branch pipe 41 and blocks the opening at the upper end of the first branch pipe 41, so that the combustible gas and the gas in the afterburning chamber body 10 cannot be discharged from the opening at the upper end of the first branch pipe 41. The pipe plug 60 can be inserted downward and block the connecting opening at the connecting position between the first branch pipe 41 and the second branch pipe 42, so as to block the communication between the second branch pipe 42 and the first branch pipe 41.

[0078] Principle of use:

[0079] When the graphitization furnace is in normal operation, the pipe plug 60 is inserted into the first branch pipe 41 through the opening at the upper end of the first branch pipe 41 and blocks the opening at the upper end of the first branch pipe 41, but does not block the connecting opening at the connecting position between the first branch pipe 41 and the second branch pipe 42, so that the second branch pipe 42 is in communication with the first branch pipe 41. In this way, the combustible gas generated during the operation of the graphitization furnace enters the afterburning chamber body 10 through the second branch pipe 42 and the first branch pipe 41 for combustion reaction. At the same time, the combustible gas and the gas in the afterburning chamber body 10 cannot be discharged from the opening at the upper end of the first branch pipe 41.

[0080] When the graphitization furnace needs to be closed, the pipe plug 60 is lowered along the first branch pipe 41 to block the connecting opening at the connecting position between the first branch pipe 41 and the second branch pipe 42, so as to block the communication between the second branch pipe 42 and the first branch pipe 41. In this way, the tail gas in the main exhaust pipe cannot enter the second branch pipe 42 through the first branch pipe 41, so as to avoid the carbon dioxide and water in the tail gas from entering the graphitization furnace through the second branch pipe 42.

[0081] The afterburning chamber provided in the embodiment of the present application can block or open the connecting opening at the connecting position between the first branch pipe 41 and the second branch pipe 42 through the pipe plug 60. By blocking the connecting opening, the communication between the second branch pipe 42 and the first branch pipe 41 can be blocked, so as to prevent the tail gas from entering the graphitization furnace through the second branch pipe 42, and further avoid the carbon dioxide and water in the tail gas from entering the graphitization furnace to cause the oxidation of the electrodes in the furnace body, so as to effectively prolong the service life of the electrodes.

[0082] In the embodiment of the present application, the side wall of the pipe plug 60 is provided with a through limiting hole 61, and the limiting rod 70 can be inserted into the limiting hole 61. The length of the limiting rod 70 is greater than the radial dimension of the opening at the upper end of the first branch pipe 41.

[0083] When the graphitization furnace is in normal operation, the pipe plug 60 needs to be in the first branch pipe 41 but does not block the connecting opening at the connecting position between the first branch pipe 41 and the second branch pipe 42, so that the second branch pipe 42 is in communication with the first branch pipe 41. Therefore, the limiting rod 70 is arranged in the limiting hole 61, and the two ends of the limiting rod 70 are arranged to pass through the opposite sides of the pipe plug 60. In this way, the pipe plug 60 can be blocked from falling downward by the limiting rod 70, so that the second branch pipe 42 is in communication with the first branch pipe 41.

[0084] Specifically, one end of the limiting rod 70 is provided with a limiting head 71, and the outer diameter of the limiting head 71 is larger than the hole diameter of the limiting hole 61. The other end of the limiting rod 70 is provided with a through insertion hole 72, and the limiting pin 80 is arranged in the insertion hole 72. By means of the limiting head 71 and the limiting pin 80 arranged in the insertion hole 72, the axial displacement of the limiting rod 70 can be limited, and the limiting rod 70 can be prevented from sliding out of the limiting hole 61.

[0085] Specifically, the first branch pipe 41 has a tapered section 411, and the inner diameter of the first branch pipe 41 gradually decreases towards the lower end of the first branch pipe 41. The outer wall surface of the pipe plug 60 close to the lower end has a tapered surface 62, and the tapered surface 62 can be attached to the inner wall of the first branch pipe 41 at the tapered section 411.

[0086] In this way, when it is needed to lower the pipe plug 60 along the first branch pipe 41 to the connecting port between the first branch pipe 41 and the second branch pipe 42, and to block the communication between the second branch pipe 42 and the first branch pipe 41, the limiting rod 70 is removed, and the pipe plug 60 is lowered along the first branch pipe 41. When the tapered surface 62 of the pipe plug 60 is attached to the inner wall of the first branch pipe 41 at the tapered section 411, the pipe plug 60 can stop falling, and the pipe plug 60 can be maintained at the position of the connecting port between the first branch pipe 41 and the second branch pipe 42.

[0087] Specifically, the top end of the pipe plug 60 is provided with a handle 63, so that the handle 63 can be used to lift or lower the pipe plug 60 more conveniently.

[0088] In the description of the embodiments of the present application, it should be understood that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixedly connected, can be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms “upper”, “lower”, “front”, “rear”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of “multiple” is two or more, unless otherwise specified.

[0089] The terms "first", "second", "third", "fourth", and the like in the description and in the claims of the present application and above depicted figures are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of these terms herein is to be construed as interchangeable in order to describe the embodiments of the present application that are depicted in the drawings and illustrated herein. For example, a process, method, object, or device that is described as including a first element can include a second element instead of the first element or in addition to the first element. Further, the terms "comprise", "comprising", "include", "including", and the like are to be construed in a non- limiting fashion as meaning that recited means or steps can be present or combined, or that recited steps, options or combinations thereof can be used, but are not a limitation of the process, method, object, or device. Further, the term "exemplary" is used in the sense(s) of serving as an example or illustration.

[0090] Finally, it should be noted that the above-mentioned embodiments merely illustrate the technical solutions of the present application, rather than limiting them. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the technical solutions recorded in the above-mentioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalent replacements. Such modifications or replacements do not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A re-burning chamber, characterized in that, The device comprises a reburning chamber body, a cutoff box and an insertion plate. The middle part of the outlet pipe is provided with the cutoff box, the middle part of the cutoff box is provided with a horizontal passage penetrating through the opposite sides of the cutoff box, and the top end of the cutoff box is provided with an insertion slot, the middle part of the insertion slot coincides with the horizontal passage. The outlet pipe comprises a first pipe segment and a second pipe segment, the first pipe segment is connected with the reburning chamber body and one side of the cutoff box, the second pipe segment is connected with the other side of the cutoff box, and the first pipe segment and the second pipe segment are both in communication with the horizontal passage. The insertion plate is slidably arranged in the insertion slot.

2. The complex combustion chamber according to claim 1, characterized by The insertion plate comprises a refractory plate and a fixing ring, and the fixing ring is wrapped around the outer peripheral wall of the refractory plate.

3. The complex combustion chamber according to claim 2, characterized by The opposite sides of the insertion slot are provided with sliding grooves, and the opposite sides of the fixing ring are provided with guide edges slidably arranged in the sliding grooves.

4. The complex combustion chamber according to claim 3, characterized by The top end of the fixing ring is provided with a handle.

5. The re-combustion chamber according to any one of claims 1 to 4, characterized in that, The opposite sides of the cutoff box are each provided with an annular flange, and the annular flanges are arranged around the outer periphery of the horizontal passage. The first pipe segment and the second pipe segment are respectively sleeved on the annular flanges on the opposite sides of the cutoff box.

6. The compound combustion chamber of claim 5 wherein, A pipe plug is further included. The inlet pipe comprises a first branch pipe and a second branch pipe, the lower end of the first branch pipe is connected with the reburning 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 through the opening at the upper end of the first branch pipe and blocks the opening at the upper end of the first branch pipe. The pipe plug can be inserted downward and block the connecting port between the first branch pipe and the second branch pipe.

7. The compound combustion chamber of claim 6 wherein, The side wall of the pipe plug is provided with a through limiting hole, a limiting rod is arranged in the limiting hole, and the opposite ends of the limiting rod are arranged to pass through the 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.

8. The compound combustion chamber of claim 7 wherein, One end of the limiting rod is provided with a limiting head, and the outer diameter of the limiting head is greater than the hole diameter of the limiting hole. The other end of the limiting rod is provided with a through insertion hole, and a limiting bolt is arranged in the insertion hole.

9. The compound combustion chamber of claim 8 wherein, The first branch pipe has a tapered segment, and the inner diameter of the first branch pipe at the tapered segment gradually decreases towards the lower end of the first branch pipe. The outer wall surface close to the lower end of the pipe plug has a tapered surface, and the tapered surface can be attached to the inner tube wall of the first branch pipe at the tapered segment.

Images