A new type of carbonization tower for producing needle coke

Abstract

This invention provides a novel carbonization tower for producing needle coke, belonging to the field of needle coke production equipment technology. It includes a tower body and a flow control plate assembly. The tower body has a reaction chamber inside, and the flow control plate assembly is located within the reaction chamber. The flow control plate assembly includes multiple flow control plates evenly distributed circumferentially along the reaction chamber. One end of each flow control plate is connected to the inner wall of the reaction chamber, and the other end is inclined downwards towards the bottom of the reaction chamber. Multiple airflow holes are evenly distributed on the flow control plates. By replanning the upward path of the gas through the airflow holes of the flow control plates, it can guide the high-temperature oil and gas to form a stable upward airflow, creating favorable conditions for the directional arrangement of the mesophase asphalt, and effectively suppress gas flow adhering to the wall or local crossflow phenomena. This promotes uniform coke deposition within the tower and reduces the formation of abnormal structures such as "honeycomb coke" and "sponge coke."

Description

Technical Field

[0001] This utility model relates to the technical field of needle coke production equipment, and more particularly to a novel carbonization tower for producing needle coke. Background Technology

[0002] Needle coke is a high-performance carbon material with a significant fibrous structure. Its production hinges on the directional growth of the mesophase during the delayed coking stage and the airflow control during the coke pulling process. Currently, traditional carbonization towers lack effective airflow control, leading to gas flow deviation or turbulence within the tower. This results in uneven coke deposition and affects the directional alignment of the needle coke fibers. For example, Chinese patent CN206872729U discloses a coke tower, including a tower body, a coke cutter built into the tower body, and a tower valve opening interlock limit switch. The coke cutter is positioned no more than 6 meters from the tower opening, and the tower valve opening interlock limit switch is also positioned no more than 6 meters from the tower opening. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a new type of carbonization tower for producing needle coke. The flow control plate guides the high-temperature oil and gas to form a stable upward airflow, creating favorable conditions for the directional arrangement of the mesophase asphalt, and effectively suppresses the phenomenon of gas flowing along the wall or local crossflow, thereby promoting the uniform deposition of coke in the tower.

[0004] This utility model discloses a novel carbonization tower for producing needle coke, comprising: a tower body and a flow control plate assembly. The tower body has a reaction chamber inside, and the flow control plate assembly is disposed inside the reaction chamber. The flow control plate assembly includes multiple flow control plates, which are evenly distributed around the circumference of the reaction chamber. One end of each flow control plate is connected to the inner wall of the reaction chamber, and the other end of each flow control plate is inclined downward and faces the bottom of the reaction chamber. Multiple airflow holes are evenly distributed on the flow control plates.

[0005] Preferably, the multiple flow control plates in each flow control plate group are symmetrical about the center of the reaction chamber.

[0006] Preferably, there are multiple flow control plate groups, which are evenly distributed at intervals along the axial direction of the reaction chamber.

[0007] Preferably, two adjacent flow control plates distributed along the axial direction of the reaction chamber are staggered.

[0008] Preferably, the tower body includes an upper tower body and a lower tower body located below the upper tower body. The upper tower body and the lower tower body are detachably connected. The upper tower body has an upper chamber, and the lower tower body has a lower chamber. The upper chamber and the lower chamber form a reaction chamber, and the flow control plate assembly is disposed in the upper chamber.

[0009] Preferably, the diameter of the airflow holes in the flow control plate gradually increases from bottom to top.

[0010] Preferably, the angle between the flow control plate and the horizontal plane is 30 degrees to 60 degrees.

[0011] Preferably, a mounting block is connected to one side of the flow control plate, the mounting block is set at an angle to the flow control plate, and the mounting block is fixedly connected to the inner wall of the reaction chamber by fastening bolts.

[0012] Preferably, the inner wall of the reaction chamber is provided with a positioning groove that is adapted to the mounting block.

[0013] Preferably, the tower body is fitted with three heating jackets, which are arranged sequentially from top to bottom. Each heating jacket has an electric heating wire or a heat transfer oil channel inside, and each heating jacket is connected to a temperature controller and a thermocouple. A heating base is provided at the bottom of the tower body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) By replanning the upward path of the gas through the air flow holes of the flow control plate, it can guide the high-temperature oil and gas to form a stable upward airflow, creating favorable conditions for the directional arrangement of the mesophase asphalt, and effectively suppress the gas wall flow or local crossflow phenomenon, thereby promoting the uniform deposition of coke in the tower and reducing the generation of abnormal structures such as "honeycomb coke" and "sponge coke". (2) By setting the flow control plate downward, the liquid phase is guided to flow along the plate surface to the bottom of the tower, avoiding the thermal decomposition of the liquid in the non-coking area at the top of the tower to generate coke blocks, which would hinder gas flow and cause safety hazards; (3) The uniformly distributed airflow holes on the flow control plate disperse the rising gas evenly, eliminating the "air resistance / air rush" phenomenon caused by flow deviation and turbulence. This can significantly reduce the wear of internal components such as the tower top cover and decoking port caused by local high pressure and high temperature, extend the service life of the equipment, and reduce the unplanned downtime rate. (4) By segmented heating of the bottom and the body of the tower, and in conjunction with segmented temperature control, the uniformity of the thermal field is improved to ensure that all raw materials in the tower undergo the complete reaction process synchronously, reducing the fluctuation of needle coke performance caused by local temperature differences, thereby ensuring that the raw materials in the tower react fully; at the same time, the stability of the temperature helps the mesophase spheres grow uniformly and stably, which helps to improve the uniformity and orderly arrangement of the spheres; segmented temperature control can also dynamically adjust the heating power according to the reaction requirements of each area, avoiding energy waste caused by high temperature throughout the tower; (5) The flow control plate adopts a detachable design, which facilitates coking and also allows for the replacement of different apertures and angles according to different raw materials and flow control requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a novel carbonization tower structure for producing needle coke, provided in Example 1. Figure 2This is a schematic diagram of the flow control plate structure in Example 1; Figure 3 This is a schematic diagram of a novel carbonization tower structure for producing needle coke, provided in Example 2. Figure 4 This is a schematic diagram of a novel carbonization tower structure for producing needle coke, provided in Example 3. Figure 5 This is a schematic diagram of the retractable support rod structure in Example 3; Figure 6 This is a schematic diagram of a novel carbonization tower structure for producing needle coke, provided in Example 4.

[0016] Figure label: 1. Tower body; 101. Reaction chamber; 102. Upper tower body; 103. Lower tower body; 104. Top cover; 105. Bottom cover; 106. Exhaust pipe; 107. Pressure relief pipe; 108. Pressure gauge; 109. Electric valve; 2. Flow control plate; 201. Mounting block; 202. Fastening bolt; 3. Air flow hole; 4. Telescopic support rod; 401. Outer cylinder; 402. Telescopic rod; 403. Locking device; 5. Heating jacket; 6. Thermocouple; 7. Heating base. Detailed Implementation

[0017] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail. Example 1

[0018] Please see Figure 1This invention provides a novel carbonization tower for producing needle coke, comprising a tower body 1 and a flow control plate assembly. The tower body 1 has a reaction chamber 101 inside, and the flow control plate assembly is disposed within the reaction chamber 101. In this embodiment, the tower body 1 is a vertical cylindrical structure, comprising an upper tower body 102 and a lower tower body 103 located below the upper tower body 102. The upper tower body 102 and the lower tower body 103 are detachably connected by bolts. A top cover 104 is detachably connected to the upper tower body 102 by bolts, and a bottom cover 105 is detachably connected to the lower tower body 103 by bolts. An exhaust pipe 106, a pressure relief pipe 107, and a pressure gauge 108 communicating with the reaction chamber 101 are connected to the top cover 104. An electric valve 109 is provided on the exhaust pipe 106. The upper column 101 has an upper chamber for installing flow control plate assemblies, and the lower column 102 has a lower chamber for coking. The upper and lower chambers together form the reaction chamber 101. Multiple flow control plate assemblies are evenly distributed at intervals along the axial direction of the reaction chamber 101, with adjacent flow control plates 2 staggered. Each flow control plate assembly includes multiple flow control plates 2, which are evenly distributed circumferentially around the reaction chamber and are symmetrical about the center of the reaction chamber 101. One end of each flow control plate 2 is connected to the inner wall of the reaction chamber 101, and the other end is inclined downwards towards the bottom of the reaction chamber 101. It is understood that by tilting downwards, the flow control plate 2 guides the liquid phase along the plate surface towards the bottom of the column, preventing the accumulation of liquid in the non-coking zone at the top of the column from thermally decomposing and forming coke, thus hindering gas flow and creating safety hazards. For example... Figure 2As shown, multiple airflow holes 3 are evenly distributed on the flow control plate 2. The diameter of the airflow holes 3 can be designed according to the control requirements of the coking medium flow rate, and is not limited in this embodiment. For example, the diameter of the airflow holes 3 is 5mm to 20mm. Through the above settings, the airflow holes 3 of the flow control plate 2 replan the upward path of the gas, which can guide the high-temperature oil and gas to form a stable upward airflow, creating favorable conditions for the directional arrangement of the mesophase asphalt, and effectively suppress the gas wall flow or local crossflow phenomenon, thereby promoting the uniform deposition of coke in the tower and reducing the generation of abnormal structures such as "honeycomb coke" and "sponge coke". In addition, the airflow holes 3 disperse the rising gas evenly, eliminating the "gas resistance / gas surge" phenomenon caused by flow deviation and turbulence, thereby significantly reducing the wear of the tower top cover, coke removal port and other internal components caused by local high pressure and high temperature, extending the service life of the equipment and reducing the unplanned downtime rate. In this process, the diameters of the airflow holes 3 in different flow control plate groups may be the same or different. Preferably, in the reaction chamber 1 of the tower body 1, the diameter of the airflow holes 3 of the flow control plate 2 gradually increases from bottom to top. As the gas flows in the reaction chamber 101, the larger the diameter, the smaller the resistance to gas passage. During the gas rise, as the diameter of the airflow holes 3 of each layer of flow control plate 2 gradually increases, the resistance to gas rise gradually decreases, the pressure drop cumulative effect weakens, and the pressure at the top of the reaction chamber 101 is lower than the pressure at the bottom. The existence of the pressure difference promotes the directional flow of gas, which is conducive to the rapid movement of gas to the top of the reaction chamber 101, thereby accelerating the formation of fibrous structures and improving the production efficiency of needle coke.

[0019] like Figure 1 As shown, in this embodiment, there are three flow control plate assemblies. Each flow control plate assembly includes two flow control plates 2 installed on the inner wall of the reaction chamber 101. The two flow control plates 2 in each flow control plate assembly are symmetrical about the center of the reaction chamber 101. The angle between each flow control plate 2 and the horizontal plane is 30 degrees to 60 degrees, preferably 45 degrees. The direction and velocity of airflow and liquid flow can be controlled by changing the angle between the flow control plate 2 and the horizontal plane to meet control requirements.

[0020] like Figure 2 As shown, in this embodiment, a mounting block 201 is connected to one side of the flow control plate 2. The mounting block 201 is set at an angle to the flow control plate 2. For example, the flow control plate 2 is a flat plate, and the mounting block 201 is a vertically set protrusion protruding from the surface of the flat plate. The angle between the protrusion and the flat plate is 135°. The mounting block 201 of the flow control plate 2 is fixedly connected to the inner wall of the reaction chamber 101 by fastening bolts 202. The flow control plate 2 and the tower body 1 adopt a detachable design, which not only facilitates decoking and maintenance, but also allows for the replacement of flow control plates 2 with different sizes, different apertures, or different tilt angles according to different raw materials and flow control requirements.

[0021] The working principle of this utility model is as follows: In use, the upper tower body 102 and the lower tower body 103 are disassembled, the raw materials are put into the lower chamber, and the flow control plate group is installed in the upper chamber. The flow control plate group is distributed from top to bottom, and each flow control plate group is equipped with multiple downward inclined flow control plates 2. After the flow control plate group is installed, the upper tower body 102 and the lower tower body 103 are aligned and connected with bolts. After the overall equipment is connected, the tower body 1 is heated. During the reaction, the gas flows upward through the flow control plate 2 and flows out through the exhaust pipe 6. After the reaction is completed, the bottom cover 105 is opened to remove the material. Because multiple airflow holes 3 are evenly distributed on the flow control plate 2, the upward path of the gas is replanned by the flow control plate 2. This can guide the high-temperature oil and gas to form a stable upward airflow, creating favorable conditions for the directional arrangement of the mesophase asphalt. It can also effectively suppress the phenomenon of gas flowing along the wall or local crossflow, thereby promoting the uniform deposition of coke in the tower and reducing the generation of abnormal structures such as "honeycomb coke" and "sponge coke". Furthermore, by setting the flow control plate 2 downwardly, the liquid phase is guided to flow along its plate surface to the bottom of the tower, avoiding the thermal decomposition of liquid in the non-coking area at the top of the tower to generate coke blocks, which would obstruct gas flow and cause safety hazards. Example 2

[0022] Please see Figure 3 The present invention will now describe a novel carbonization tower for producing needle coke according to Embodiment 2. The difference between this embodiment and Embodiment 1 is only that the inner wall of the reaction chamber 101 is provided with a positioning groove adapted to the mounting block 201. The positioning groove is provided on the inner wall of the reaction chamber 101 to place the mounting block 201, facilitating the quick positioning and installation of the flow control plate 2. The mounting block 201 is threaded into the positioning groove by fastening bolts 202, thus fixing the flow control plate 2 to the inner wall of the reaction chamber 101. Example 3

[0023] Please see Figure 4 and Figure 5The present invention will now describe a novel carbonization tower for producing needle coke according to Embodiment 3. The difference between this embodiment and Embodiment 1 lies only in that: the mounting block 201 and the flow control plate 2 are hinged, and a telescopic support rod 4 is hinged between the flow control plate 2 and the inner wall of the reaction chamber 101. By adjusting the length of the telescopic support rod 4, the tilt angle of the flow control plate 2 is changed to control the flow direction and velocity of the airflow and liquid. Specifically, the mounting block 201 and the flow control plate 2 are hinged together by a hinge. One side of the hinge is fixedly connected to the mounting block 201 by screws, and the other side of the hinge is fixedly connected to the flow control plate 2 by screws. The mounting block 201 and the flow control plate 2 can rotate around the axis of the hinge respectively. The telescopic support rod 4 is located below the flow control plate 2. One telescopic end of the rod is connected to a first hinge seat, which is detachably installed below the flow control plate 2. The other end of the rod is connected to a second hinge seat, which is detachably installed on the inner wall of the reaction chamber 101. The telescopic support rod 4 includes an outer cylinder 401 and a telescopic rod 402. The telescopic rod 402 is slidably connected inside the outer cylinder 401. A locking member 403 is threadedly connected to the outer side of the outer cylinder 401. One end of the locking member 403 abuts against the telescopic rod 402, so that the telescopic rod 402 is in a locked state. Rotating the locking member 403 moves it away from the telescopic rod 402, and moving the telescopic rod 402 adjusts the length of the telescopic support rod 4. Example 4

[0024] Please see Figure 6 The present invention will now describe a novel carbonization tower for producing needle coke according to Embodiment 4. The difference between this embodiment and Embodiment 1 is that: three heating jackets 5 are fitted around the outside of the tower body 1, arranged sequentially from top to bottom. Each heating jacket 5 contains an electric heating wire or a heat transfer oil channel, and is connected to a temperature controller and a thermocouple 6. A heating base 7 is provided at the bottom of the tower body 1. Specifically, the heating base 7 is located below the bottom cover 105 of the tower body 1. The tower body 1 is divided into an upper section, a middle section, and a lower section from top to bottom, with a height ratio of 2:1:1 (adjustable according to the total height of the tower). Each section has an annular heating jacket 5 fitted around its outer wall. Each heating jacket 5 is independently connected to a temperature controller (such as AI-518P type) and a thermocouple 6, enabling independent temperature control (accuracy ±5℃) and measurement of the three sections. The temperature controller is located outside the tower body 1, and the thermocouple 6 is located inside the tower body 1. For example, the temperature can be precisely set for different reaction stages (such as stabilizing the upper stage heating at 450-500℃ to promote the cracking of raw materials, setting the middle stage temperature at 500-550℃ to accelerate the growth of the meso phase, and setting the lower stage temperature at 550-600℃ to achieve directional solidification of raw coke). By controlling the temperature in stages, the uniformity of the thermal field can be improved, the reaction can be more complete, and the quality of needle coke can be improved.

[0025] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A novel carbonization tower for producing needle coke, characterized in that, It includes a tower body and a flow control plate assembly, wherein the tower body has a reaction chamber inside the reaction chamber and the flow control plate assembly is disposed inside the reaction chamber; The flow control plate assembly includes multiple flow control plates, which are evenly distributed around the circumference of the reaction chamber. One end of each flow control plate is connected to the inner wall of the reaction chamber, and the other end of each flow control plate is inclined downward and faces the bottom of the reaction chamber. Multiple airflow holes are evenly distributed on each flow control plate.

2. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, In each of the flow control plate groups, multiple flow control plates are symmetrical about the center of the reaction chamber.

3. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, The number of flow control plate groups is multiple, and the multiple flow control plate groups are evenly distributed at intervals along the axial direction of the reaction chamber.

4. The novel carbonization tower for producing needle coke according to claim 3, characterized in that, The two adjacent flow control plates distributed along the axial direction of the reaction chamber are staggered.

5. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, The tower body includes an upper tower body and a lower tower body located below the upper tower body. The upper tower body and the lower tower body are detachably connected. The upper tower body has an upper chamber, and the lower tower body has a lower chamber. The upper chamber and the lower chamber form the reaction chamber, and the flow control plate assembly is disposed in the upper chamber.

6. The novel carbonization tower for producing needle coke according to claim 3, characterized in that, From bottom to top, the diameter of the airflow holes in the flow control plate gradually increases.

7. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, The angle between the flow control plate and the horizontal plane is 30 to 60 degrees.

8. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, A mounting block is connected to one side of the flow control plate. The mounting block is set at an angle to the flow control plate and is fixedly connected to the inner wall of the reaction chamber by fastening bolts.

9. The novel carbonization tower for producing needle coke according to claim 8, characterized in that, The inner wall of the reaction chamber is provided with a positioning groove that is adapted to the mounting block.

10. The novel carbonization tower for producing needle coke according to claim 1, characterized in that, The tower body is fitted with three heating jackets, which are arranged sequentially from top to bottom. Each heating jacket has an electric heating wire or a heat transfer oil channel inside, and each heating jacket is connected to a temperature controller and a thermocouple. A heating base is provided at the bottom of the tower body.

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