Coke oven uptake heat exchanger

Abstract

The utility model discloses a coke oven riser heat exchanger relates to coking technical field, including base, the top fixed mounting of base has seamless alloy steel pipe, is provided with nanometer coating on the inner wall of seamless alloy steel pipe, is connected with two half circle outer coil pipes of sheathed of seamless alloy steel pipe, and the outside of two half circle outer coil pipes is equipped with thermal cotton layer. The utility model is when using, two connecting pipes are fixedly connected with the top of base, and the liquid pipe is connected through the connecting pipe, and the liquid enters the connecting pipe and is filtered through the filtering mechanism, then enters the pipe and half circle outer coil pipe, thereby taking away the heat generated when high temperature raw coal gas passes, and is equipped with two half circle outer coil pipes, can double -way water inlet, under the condition of single -way water shortage, another road keeps unobstructed, and the filtering mechanism is convenient for sealing half circle outer coil pipe and then disassembling through the dismounting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of coking technology, and in particular to a coke oven riser heat exchanger. Background Technology

[0002] Currently, the main domestic coking process involves heating and dry distilling coking coal in a coke oven in the absence of air to produce coke, while simultaneously generating a large amount of volatile raw coal gas. The sensible heat carried out from the 950–1050℃ red coke exiting the coke oven carbonization chamber accounts for 37% of the total heat output from the coke oven; the sensible heat carried out from the 650–800℃ raw coal gas accounts for 36%; the heat carried out from the 180–230℃ flue gas accounts for 17%; and heat loss from the oven surface accounts for 10%. For the sensible heat carried out from coke, mature and reliable dry quenching devices exist for recovery and power generation. However, regarding the sensible heat carried out from raw coal gas, domestic attempts to recover it began in the late 1970s. Despite efforts, a mature, reliable, and efficient device has yet to be developed.

[0003] In traditional coking processes, coal entering the coke oven undergoes high-temperature dry distillation in the carbonization chamber for one coking cycle to produce coke. During this process, high-temperature raw coal gas (650–850°C) is generated. This raw coal gas flows through an ascent pipe and is then cooled to approximately 85°C by ammonia spraying in a three-way bridge pipe before being sent to the gas refining process. However, the portion of heat reduced by ammonia spraying is not effectively recovered and utilized. Therefore, it is necessary to develop a system for recovering and utilizing the waste heat from the ascent pipe coal gas. Utility Model Content

[0004] The purpose of this application is to provide a coke oven riser heat exchanger to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a coke oven riser heat exchanger, comprising a base, a seamless alloy steel pipe fixedly installed on the top of the base, a nano-coating disposed on the inner wall of the seamless alloy steel pipe, two interconnected semi-circular outer coils sleeved on the seamless alloy steel pipe, an insulation cotton layer installed on the outer side of the two semi-circular outer coils, a graphene-based thermally conductive material located between the insulation cotton layer and the seamless alloy steel pipe filling the two semi-circular outer coils, a stainless steel outer protective layer installed on the outer side of the insulation cotton layer, an outlet pipe fixedly installed at the top of the two semi-circular outer coils, an inlet pipe fixedly installed at the bottom of the two semi-circular outer coils, a connecting pipe fixedly installed on one side of the two inlet pipes at the top of the base, and a filter mechanism installed between the inlet pipes and the connecting pipes via a disassembly mechanism.

[0006] Preferably, the disassembly mechanism includes an external thread fixedly installed on the outer side of the inlet pipe, an internal thread sleeve threaded on the external thread, an annular convex groove on one side of the internal thread sleeve, an annular convex block rotatably installed in the annular convex groove, a movable ring fixedly installed on the side of the annular convex block extending outside the annular convex groove, and a movable disk fixedly installed on the side of the movable ring away from the internal thread sleeve.

[0007] Preferably, the disassembly mechanism further includes a connecting ring fixedly installed on the inner wall of the moving ring, with sealing rings fixedly installed on both sides of the connecting ring, and two fixing rings fixedly installed on the outer side of the inlet pipe, with the two fixing rings corresponding to the positions of the two sealing rings respectively.

[0008] Preferably, the disassembly mechanism further includes two sliders fixedly installed on the inner wall of the moving ring, and two grooves are provided on the outer side of the inlet tube, with the two sliders slidably installed in the two grooves respectively.

[0009] Preferably, the disassembly mechanism further includes a fixed plate fixedly installed on the inner wall of the inlet pipe. The fixed plate has a plurality of first through holes on its side, and the movable plate has a plurality of second through holes on its side. The plurality of second through holes are respectively offset from the plurality of first through holes. The movable plate has a plurality of first sealing rings fixedly installed on its side, and the plurality of first sealing rings are respectively positioned corresponding to the plurality of second through holes.

[0010] Preferably, the filtration mechanism includes an installation tube, an annular groove is formed on the side of the connecting tube and the movable disk that are close to each other, a second sealing ring is fixedly installed on the inner wall of each of the two annular grooves, the two sides of the installation tube respectively contact the side of the two second sealing rings that are close to each other, and a filter screen is fixedly installed on the inner wall of the installation tube.

[0011] In summary, the technical effects and advantages of this utility model are as follows: In use, the two connecting pipes are fixedly connected to the top of the base. The liquid inlet pipe is connected to the connecting pipe. After the liquid enters the connecting pipe, it is filtered by the filter mechanism and then enters the inlet pipe and the semi-circular outer coil, thereby removing the heat generated when the high-temperature raw coal gas passes through. There are two semi-circular outer coils, which can be used for dual water inlet. If one channel is short of water, the other channel remains unobstructed. The filter mechanism can be easily removed after sealing the semi-circular outer coil through the disassembly mechanism.

[0012] In this invention, when the filter screen needs maintenance, the internal threaded sleeve is rotated to make it spirally move, thereby moving the moving ring away from the connecting pipe. The moving ring drives the moving disc to move, and the moving disc moves so that multiple first sealing rings contact the side of the fixed disc, thereby sealing multiple second through holes and preventing the liquid in the semi-circular outer coil from flowing back. Then the installation pipe can be removed to clean the filter screen. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure in the embodiments of this application; Figure 2 A schematic diagram showing the connection between the inlet pipe, connecting pipe, disassembly mechanism, and filtration mechanism; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0015] In the diagram: 1. Base; 2. Seamless alloy steel pipe; 3. Nano-coating; 4. Semi-circular outer coil; 5. Graphene-based thermally conductive material; 6. Insulation layer; 7. Outlet pipe; 8. Inlet pipe; 9. Connecting pipe; 10. Mounting pipe; 11. Filter screen; 12. External thread; 13. Internal thread sleeve; 14. Annular convex block; 15. Moving ring; 16. Connecting ring; 17. Sealing ring; 18. Fixing ring; 19. Slider; 20. Slide groove; 21. Fixing plate; 22. First through hole; 23. Moving plate; 24. Second through hole; 25. First sealing ring; 26. Second sealing ring; 27. Stainless steel outer protective layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Reference Figure 1-4The coke oven riser heat exchanger shown includes a base 1, on the top of which a seamless alloy steel pipe 2 is fixedly installed. A nano-coating 3 is applied to the inner wall of the seamless alloy steel pipe 2. This coating forms a smooth and robust glaze at high temperatures, has a self-cleaning effect, and is not prone to tar and graphite buildup. It is resistant to high-temperature corrosion from H2S, H2, SOx, etc., and adapts to various complex and harsh operating conditions of raw coal gas. It minimizes contact between the high-temperature raw coal gas and the high-temperature resistant alloy material on the inner wall, preventing hydrogen corrosion caused by prolonged high temperatures. Two interconnected semi-circular outer coils 4 are sleeved on the seamless alloy steel pipe 2. Each semi-circular outer coil 4 is longer than 20 meters, reducing butt welds and lowering the possibility of weld cracking. Insulation cotton layers 6 are installed on the outer sides of the two semi-circular outer coils 4. The insulation cotton layers 6 maximize heat protection, allowing heat exchange to occur within a confined, enclosed space, reducing surface temperature and simultaneously lowering the ambient temperature at the furnace top. 4. The outer layer is filled with graphene-based thermal conductive material 5 located between the insulation cotton layer 6 and the seamless alloy steel pipe 2. The graphene-based thermal conductive material 5 can enhance the heat exchange between the high-temperature raw coal gas and the coil, improve thermal efficiency, and increase steam production. The insulation cotton layer 6 is covered with a stainless steel outer protective layer 27. The stainless steel outer protective layer 27 increases the overall structural strength and is more adaptable to the poor operating environment at the furnace top. The top of the two semi-circular outer coils 4 is fixedly installed with outlet pipes 7, and the bottom of the two semi-circular outer coils 4 is fixedly installed with inlet pipes 8. A connecting pipe 9 is fixedly installed on the top of the base 1 on one side of the two inlet pipes 8. A filter mechanism is installed between the inlet pipes 8 and the connecting pipes 9 through a disassembly mechanism.

[0018] With the above structure: during use, the two connecting pipes 9 are fixedly connected to the top of the base 1. The liquid inlet pipe is connected through the connecting pipes 9. After the liquid enters the connecting pipes 9, it is filtered through the filter screen 11 and then enters the inlet pipe 8 and the semi-circular outer coil 4, thereby removing the heat generated when the high-temperature raw coal gas passes through. There are two semi-circular outer coils 4, which can be used for dual water inlet. If one channel is short of water, the other channel remains unobstructed.

[0019] like Figure 2 and Figure 4 As shown, the disassembly mechanism includes an external thread 12 fixedly installed on the outer side of the inlet pipe 8. An internal thread sleeve 13 is threaded onto the external thread 12. An annular convex groove is formed on one side of the internal thread sleeve 13. An annular convex block 14 is rotatably installed in the annular convex groove. A movable ring 15 is fixedly installed on the side of the movable ring 14 that extends outside the annular convex groove. A movable disk 23 is fixedly installed on the side of the movable ring 15 away from the internal thread sleeve 13. By rotating the internal thread sleeve 13 to make it spirally move, the movable ring 15 moves away from the connecting pipe 9, and the movable ring 15 drives the movable disk 23 to move.

[0020] like Figure 2As shown, the disassembly mechanism also includes a connecting ring 16 fixedly installed on the inner wall of the moving ring 15. Sealing rings 17 are fixedly installed on both sides of the connecting ring 16, and two fixing rings 18 are fixedly installed on the outer side of the inlet pipe 8. The two fixing rings 18 correspond to the positions of the two sealing rings 17. Through the arrangement of the two sealing rings 17, during installation and disassembly, the two sealing rings 17 contact the sides of the two fixing rings 18 respectively, thereby sealing the gap between the moving ring 15 and the inlet pipe 8.

[0021] like Figure 3 As shown, the disassembly mechanism also includes two sliders 19 fixedly installed on the inner wall of the moving ring 15. Two grooves 20 are opened on the outer side of the inlet pipe 8, and the two sliders 19 are slidably installed in the two grooves 20 respectively. By setting the sliders 19, the moving ring 15 can be limited, so that it can only move back and forth.

[0022] like Figure 2 and Figure 4 As shown, the disassembly mechanism also includes a fixed plate 21 fixedly installed on the inner wall of the inlet pipe 8. The fixed plate 21 has multiple first through holes 22 on its side, and the movable plate 23 has multiple second through holes 24 on its side. The multiple second through holes 24 are staggered from the multiple first through holes 22. Multiple first sealing rings 25 are fixedly installed on the side of the movable plate 23, and the positions of the multiple first sealing rings 25 correspond to the positions of the multiple second through holes 24. The movable rings 15 drive the movable plate 23 to move, causing the multiple first sealing rings 25 to contact the side of the fixed plate 21, thereby sealing the multiple second through holes 24. This prevents the liquid inside the semi-circular outer coil 4 from flowing back, facilitating the subsequent disassembly and installation of the pipe 10.

[0023] like Figure 2 As shown, the filtration mechanism includes an installation pipe 10, a connecting pipe 9, and a movable disc 23. Annular grooves are formed on the sides of these grooves that are close to each other. Second sealing rings 26 are fixedly installed on the inner walls of both annular grooves. The two sides of the installation pipe 10 respectively contact the sides of the two second sealing rings 26 that are close to each other. A filter screen 11 is fixedly installed on the inner wall of the installation pipe 10. Through the filter screen 11, the incoming liquid can be filtered, thereby preventing impurities from adhering to the inner wall of the semi-circular outer disc 4.

[0024] The working principle of this practical application is as follows: When in use, the two connecting pipes 9 are fixedly connected to the top of the base 1. The liquid inlet pipe is connected through the connecting pipes 9. After the liquid enters the connecting pipes 9, it is filtered through the filter screen 11 and then enters the inlet pipe 8 and the semi-circular outer coil 4, thereby removing the heat generated when the high-temperature raw coal gas passes through. There are two semi-circular outer coils 4, which can be used for dual water inlet. If one water inlet is short, the other water inlet will remain unobstructed. When maintenance of the filter screen 11 is required, the inner threaded sleeve 13 is rotated to make it spirally move, thereby moving the moving ring 15 away from the connecting pipe 9. The moving ring 15 drives the moving disk 23 to move. The movement of the moving disk 23 causes multiple first sealing rings 25 to contact the side of the fixed disk 21, thereby sealing multiple second through holes 24 and preventing the liquid in the semi-circular outer coil 4 from flowing back. When the moving disk 23 moves, one side of the mounting pipe 10 slowly moves out of the annular groove, so that when the first sealing ring 25 contacts the fixed disk 21, the mounting pipe 10 can be removed, which facilitates the cleaning of the filter screen 11.

[0025] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coke oven riser heat exchanger, characterized in that: The system includes a base (1), on which a seamless alloy steel pipe (2) is fixedly installed. A nano-coating (3) is provided on the inner wall of the seamless alloy steel pipe (2). Two connected semi-circular outer coils (4) are sleeved on the seamless alloy steel pipe (2). A heat insulation cotton layer (6) is installed on the outside of the two semi-circular outer coils (4). Graphene-based thermal conductive material (5) is filled between the heat insulation cotton layer (6) and the seamless alloy steel pipe (2) on the outside of the two semi-circular outer coils (4). A stainless steel outer protective layer (27) is installed on the outside of the heat insulation cotton layer (6). An outlet pipe (7) is fixedly installed at the top of the two semi-circular outer coils (4). An inlet pipe (8) is fixedly installed at the bottom of the two semi-circular outer coils (4). A connecting pipe (9) is fixedly installed on one side of the two inlet pipes (8) on the top of the base (1). A filter mechanism is installed between the inlet pipe (8) and the connecting pipe (9) through a disassembly mechanism.

2. The coke oven riser heat exchanger according to claim 1, characterized in that: The disassembly mechanism includes an external thread (12) fixedly installed on the outer side of the inlet pipe (8), an internal thread sleeve (13) is threaded on the external thread (12), an annular convex groove is provided on one side of the internal thread sleeve (13), an annular convex block (14) is rotatably installed in the annular convex groove, the side of the annular convex block (14) extends to the outside of the annular convex groove and a movable ring (15) is fixedly installed thereon, and a movable disk (23) is fixedly installed on the side of the movable ring (15) away from the internal thread sleeve (13).

3. A coke oven riser heat exchanger according to claim 2, characterized in that: The disassembly mechanism also includes a connecting ring (16) fixedly installed on the inner wall of the moving ring (15). Both sides of the connecting ring (16) are fixedly installed with sealing rings (17). Two fixing rings (18) are fixedly installed on the outer side of the inlet pipe (8). The two fixing rings (18) correspond to the positions of the two sealing rings (17).

4. A coke oven riser heat exchanger according to claim 2, characterized in that: The disassembly mechanism also includes two sliders (19) fixedly installed on the inner wall of the moving ring (15). Two grooves (20) are opened on the outer side of the inlet pipe (8), and the two sliders (19) are slidably installed in the two grooves (20).

5. A coke oven riser heat exchanger according to claim 2, characterized in that: The disassembly mechanism also includes a fixed plate (21) fixedly installed on the inner wall of the inlet pipe (8). The fixed plate (21) has a plurality of first through holes (22) on its side. The movable plate (23) has a plurality of second through holes (24) on its side. The plurality of second through holes (24) are respectively staggered from the plurality of first through holes (22). The movable plate (23) has a plurality of first sealing rings (25) fixedly installed on its side. The plurality of first sealing rings (25) are respectively positioned opposite to the plurality of second through holes (24).

6. A coke oven riser heat exchanger according to claim 2, characterized in that: The filtration mechanism includes an installation tube (10), and annular grooves are provided on the sides of the connecting tube (9) and the movable disk (23) that are close to each other. A second sealing ring (26) is fixedly installed on the inner wall of each of the two annular grooves. The two sides of the installation tube (10) respectively contact the sides of the two second sealing rings (26) that are close to each other. A filter screen (11) is fixedly installed on the inner wall of the installation tube (10).

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