Multi-stage temperature control coil for diesel cracking reactor

Abstract

The utility model discloses a kind of multi-section temperature control coil of diesel cracking reactor, belong to petroleum chemical equipment technical field, it includes bearing assembly, filter component and flow rate component, three are sequentially fluidly communicated;Filter component is used to remove solid impurities in oil gas on line, flow rate component includes the sliding plate driven by electric push rod, sliding plate is rotated in the valve plate in hollow disc by rotating column, realizes the automation accurate adjustment of flow rate.The utility model is closely integrated by high-efficiency on-line filtering and accurate automatic flow rate control function, effectively solve the problem that the equipment operation is unstable, product quality fluctuation caused by the impurity blockage and flow rate control inaccuracy in prior art, significantly improve the quality and yield of cracking product, enhance the reliability of system, and make equipment maintenance more safe, convenient.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical equipment technology, and in particular to a multi-stage temperature control coil for a diesel cracking reactor. Background Technology

[0002] Diesel cracking is a key process in the petrochemical industry, aiming to convert heavy diesel into high-value-added light oil products in a high-temperature, high-pressure cracking reactor. During high-temperature cracking, side reactions such as coking and carbon deposition inevitably occur, resulting in solid impurities such as coke particles mixed in with the reaction products. These solid impurities can enter subsequent pipelines and equipment with the high-temperature oil and gas flow. If left untreated, these particles can easily cause severe wear or blockage to precision components such as pipelines, heat exchangers, and regulating valves, not only shortening equipment lifespan but also potentially causing production accidents, leading to frequent shutdowns and maintenance of the entire production line, severely impacting production efficiency and economic benefits.

[0003] Furthermore, to optimize the efficiency of the cracking reaction and product yield, precise control of the residence time of materials in the reactor is crucial, and residence time is directly affected by the oil and gas flow rates. In existing technologies, flow rates are typically adjusted using manual valves or simple programmable valves. However, this method suffers from slow response speed and low adjustment accuracy, making it difficult to match the dynamic changes in temperature and pressure during the reaction in real time. This leads to fluctuations in process conditions, ultimately affecting the cracking depth and the stability of product quality. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a multi-stage temperature control coil for a diesel cracking reactor, aiming to improve the existing technology of diesel cracking reactors, which are prone to downstream valve and pipeline blockage and wear due to solid impurities such as coke entrained in cracking products, and the dependence on manual or simple program control for adjusting oil and gas flow rates, resulting in low control accuracy, slow response, and difficulty in optimizing process conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage temperature control coil for a diesel cracking reactor, comprising: a support component, a filter component, and a flow rate component.

[0006] The flow rate assembly has a hollow disk with an internal fluid channel. A first valve plate and a second valve plate are rotatably disposed within the fluid channel of the hollow disk. The output end of the electric push rod is connected to a sliding plate, which is connected to the first valve plate and the second valve plate via a first rotating column and a second rotating column.

[0007] The outlet of the carrier component is in fluid communication with the inlet of the filter component, and the outlet of the filter component is in fluid communication with the inlet of the flow velocity component.

[0008] Preferably, the supporting assembly includes a reaction vessel, a heating pipe disposed on the reaction vessel, and a first support for supporting the reaction vessel.

[0009] Preferably, the filter assembly includes a support cylinder, a filter plate disposed inside the support cylinder, a connecting pipe connecting the support assembly to the support cylinder, and a second bracket for supporting the support cylinder.

[0010] Preferably, as a specific embodiment, the filter plate is detachably mounted to the carrier cylinder by bolts and nuts, and the filter assembly further includes a sealing plate.

[0011] Preferably, the sliding plate is provided with a sliding groove, and the ends of the first rotating column and the second rotating column slide in cooperation with the sliding groove to form the transmission connection.

[0012] Preferably, the flow rate assembly further includes a connecting frame, on which the electric push rod is fixedly installed for stable support.

[0013] Preferably, the flow rate assembly further includes a temporary conduit tube that communicates with the side wall of the hollow disc.

[0014] Preferably, one end of the temporary retention tube is connected to the filter assembly, and the other end is connected to the heating tube, thereby forming a circulation loop.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the cooperation of electric push rod, sliding plate and valve plate realizes the automated, continuous and precise control of the oil and gas flow rate after cracking, which is conducive to optimizing key process parameters such as the residence time of materials in the reactor, thereby improving the depth and selectivity of diesel cracking, and ultimately improving the yield and quality of the product.

[0017] 2. In this utility model, by setting a filter component before the speed regulating valve, solid impurities such as coke generated in the oil-gas mixture can be removed online, effectively preventing blockage or wear of subsequent precision speed regulating valves and pipelines, extending the continuous and stable operation cycle of the equipment, reducing the frequency and cost of downtime maintenance due to malfunctions, and improving the reliability of the entire device. Attached Figure Description

[0018] Figure 1 This is a perspective view of a multi-stage temperature-controlled coil for a diesel cracking reactor proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the outer wall structure of the reaction vessel of a diesel cracking reactor with a multi-section temperature-controlled coil, as proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the outer wall structure of the reaction vessel of a diesel cracking reactor with a multi-section temperature-controlled coil, as proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the inner wall structure of the bearing cylinder of a multi-section temperature-controlled coil for a diesel cracking reactor proposed in this utility model.

[0022] Figure 5 This is an exploded structural diagram of the flow velocity assembly of a multi-segment temperature control coil in a diesel cracking reactor proposed in this utility model.

[0023] Legend:

[0024] 1. Bearing assembly; 101. Reaction vessel; 102. First support; 103. Heating tube; 2. Flow rate assembly; 201. Temporary pipe; 202. Hollow disc; 203. Connecting frame; 204. Electric push rod; 205. Sliding plate; 206. First valve plate; 207. Second valve plate; 208. First rotating column; 209. Second rotating column; 3. Filter assembly; 301. Bearing cylinder; 302. Bolt; 303. Nut; 304. Filter plate; 305. Connecting pipe; 306. Second support; 307. Sealing plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0026] Reference Figures 1-5 This utility model provides an embodiment of a multi-stage temperature control coil for a diesel cracking reactor, which aims to solve the problem that existing diesel cracking reactors lack precise and automated control of the flow rate of cracked oil and gas, making it difficult to optimize the reaction process and ensure stable operation of the equipment. The multi-stage temperature control coil for the diesel cracking reactor includes a support component 1, a filter component 3, and a flow rate component 2. The outlet of the support component 1 is sequentially fluidly connected to the inlet of the flow rate component 2 through the filter component 3.

[0027] Specifically, the supporting component 1 includes a reaction tank 101 for containing and reacting diesel fuel, a heating pipe 103 fixedly mounted on the reaction tank 101 for heating, and a first support 102 fixedly connected to the bottom of the reaction tank 101 for stable support.

[0028] The filter assembly 3 includes a support cylinder 301, a second bracket 306 for supporting the support cylinder 301, and a connecting pipe 305 for fixing the support assembly 1 to the support cylinder 301 and achieving fluid communication. The support cylinder 301 is provided with a filter plate 304, which is detachably fixed to the support cylinder 301 by bolts 302 and nuts 303. The filter assembly 3 also includes a sealing plate 307 for safe sealing when the filter plate 304 is removed.

[0029] The flow rate assembly 2 includes a hollow disk 202 with a fluid channel formed inside, a fixedly installed connecting frame 203, an electric push rod 204 fixed on the connecting frame 203, a sliding plate 205 with its output end connected to the electric push rod 204, and a temporary tube 201 fixedly connected to the side wall of the hollow disk 202. The first valve plate 206 and the second valve plate 207 are rotatably disposed in the fluid channel of the hollow disk 202. One end of the first rotating column 208 is fixedly connected to the first valve plate 206, and one end of the second rotating column 209 is fixedly connected to the second valve plate 207. A sliding groove is provided on the sliding plate 205, and the other ends of the first rotating column 208 and the second rotating column 209 respectively slide in cooperation with the corresponding sliding grooves to convert the linear motion of the sliding plate 205 into the rotation of the first valve plate 206 and the second valve plate 207.

[0030] The diesel feedstock undergoes a cracking reaction in the reaction tank 101 of the support component 1 via the heating pipe 103. The resulting high-temperature oil-gas mixture enters the support cylinder 301 of the filter component 3 through the connecting pipe 305. The oil-gas mixture passes through the filter plate 304 to remove solid impurities. The clean oil-gas mixture then enters the hollow disk 202 of the flow velocity component 2. At this time, the electric push rod 204 drives the sliding plate 205 to move linearly according to the control signal. The sliding plate 205 slides with the first rotating column 208 and the second rotating column 209 through the sliding groove, causing the first valve plate 206 and the second valve plate 207 to rotate in the fluid channel of the hollow disk 202. By changing the opening angle of the two valve plates, the flow rate of the oil-gas mixture is precisely adjusted. The adjusted oil-gas mixture is finally discharged through the temporary pipe 201.

[0031] In a preferred embodiment, the outlet end of the temporary pipe 201 is fixedly connected to the heating pipe 103 of the bearing assembly 1, so that the oil and gas after flow rate regulation can return to the heating system, thereby forming a circulation loop to improve the overall thermal utilization efficiency.

[0032] For the specific internal structure of the electric push rod 204 and the implementation of its control circuit in this embodiment, those skilled in the art can use existing mature technologies as needed, which are well-known technologies in the field and will not be described in detail here.

[0033] Working principle: Diesel feedstock is first fed into the reaction tank 101 of the support assembly 1. The heating pipe 103 heats the reaction tank 101, causing the diesel to undergo a cracking reaction to generate a high-temperature oil-gas mixture. Throughout the reaction process, the first support 102 stably supports the reaction tank 101. The generated high-temperature oil-gas mixture flows out from the support assembly 1, enters the support cylinder 301 of the filter assembly 3 via the connecting pipe 305, and passes through the filter plate 304 installed therein. The filter plate 304 intercepts solid impurities such as coke carried in the oil-gas mixture, resulting in a clean oil-gas flow. The second support 306 provides stable support for the support cylinder 301 during this process. The clean oil-gas flow then enters the hollow disk 202 of the flow rate assembly 2. When the flow rate needs to be adjusted, the electric push rod 204 fixed on the connecting frame 203 operates, and its extension and retraction movement drives the sliding plate 205 to produce a precise linear displacement. The ends of the first rotating column 208 and the second rotating column 209 are respectively slidably engaged with the grooves on the sliding plate 205. The linear motion of the sliding plate 205 is converted into the synchronous rotation of the first rotating column 208 and the second rotating column 209. The first rotating column 208 drives the first valve plate 206 to rotate, and the second rotating column 209 drives the second valve plate 207 to rotate. By changing the opening angle of the first valve plate 206 and the second valve plate 207 in the fluid channel of the hollow disc 202, the effective flow cross-sectional area of ​​the fluid can be changed, thereby realizing precise and automatic adjustment of the oil and gas flow rate, solving the problem of imprecise flow rate control. The adjusted oil and gas flow finally flows out through the temporary pipe 201. When the filter plate 304 needs maintenance, the pipeline can be temporarily blocked with the sealing plate 307 first, and then the nut 303 can be loosened and the bolt 302 removed, so that the filter plate 304 can be easily removed from the bearing cylinder 301 for cleaning or replacement.

Claims

1. A multi-stage temperature-controlled coil for a diesel cracking reactor, comprising: The carrier component (1) and the filter component (3), wherein the inlet of the filter component (3) is in fluid communication with the outlet of the carrier component (1); characterized in that it further comprises: A flow rate assembly (2), the inlet of which is in fluid communication with the outlet of the filter assembly (3), the flow rate assembly (2) comprising: A hollow disc (202) has a fluid channel formed inside it; a first valve plate (206) and a second valve plate (207) are rotatably disposed within the fluid channel of the hollow disc (202); An electric push rod (204) and a sliding plate (205) are connected to the output end of the electric push rod (204); and a first rotating column (208) and a second rotating column (209) are provided. The first rotating column (208) is fixedly connected to the first valve plate (206), and the second rotating column (209) is fixedly connected to the second valve plate (207). Both the first rotating column (208) and the second rotating column (209) are connected to the sliding plate (205) in a transmission manner, so as to convert the linear motion of the sliding plate (205) into the rotation of the first valve plate (206) and the second valve plate (207).

2. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 1, characterized in that, The supporting component (1) includes a reaction vessel (101), a heating tube (103) disposed on the reaction vessel (101), and a first support (102) for supporting the reaction vessel (101).

3. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 1, characterized in that, The filter assembly (3) includes a support cylinder (301), a filter plate (304) disposed inside the support cylinder (301), a connecting pipe (305) connecting the support assembly (1) to the support cylinder (301), and a second bracket (306) for supporting the support cylinder (301).

4. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 3, characterized in that, The filter assembly (3) also includes bolts (302) and nuts (303) for detachably mounting the filter plate (304) to the carrier cylinder (301), and a sealing plate (307).

5. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 1, characterized in that, The sliding plate (205) is provided with a sliding groove, and the ends of the first rotating column (208) and the second rotating column (209) slide in cooperation with the sliding groove to form the transmission connection.

6. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 1, characterized in that, The flow rate component (2) also includes a connecting frame (203), and the electric push rod (204) is fixedly installed on the connecting frame (203).

7. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 1, characterized in that, The flow rate assembly (2) also includes a temporary conduit (201) which is connected to the side wall of the hollow disc (202).

8. The multi-stage temperature-controlled coil of the diesel cracking reactor according to claim 7, characterized in that, One end of the temporary tube (201) is connected to the filter assembly (3), and the other end is connected to the heating tube (103).

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