Pilot plant test equipment for low-cost pitch coke

Abstract

The utility model relates to the technical field of chemical engineering, and discloses low-cost pitch coke pilot plant test equipment which comprises a raw material tank, a heating furnace tube is fixedly assembled on the side face of the raw material tank, a fixing frame is fixedly assembled on the top of the raw material tank, an air inlet pipe is fixedly connected to the inner wall of the fixing frame in a sleeved mode, and an exhaust pipe is arranged on the side face of the air inlet pipe. The outer edge of the exhaust pipe is fixedly connected with the inner wall of the fixing frame in a sleeving mode, and the inner wall of the exhaust pipe penetrates through the inner wall of the fixing frame to communicate with the inner wall of the air inlet pipe. The air inlet pipe is used for assisting external air in entering the fixing frame, so that the air in the air inlet pipe is used for pushing the air supply blades to rotate in the inner wall of the fixing frame, the air supply blades drive the main rod to rotate through the auxiliary rod, and then the main rod drives the driving gear to rotate in the inner wall of the convex tooth set through the connecting plate; a driving gear is used for driving a stirring rod to rotate through a round rod and a rotating plate, and the stirring rod and stirring blades are used for stably mixing the inside of the raw material tank.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a pilot plant of low-cost pitch coke. Background Art

[0002] The asphalt coke pilot plant uses refined asphalt from the coal tar refining production unit as raw material to produce high-quality needle coke products.

[0003] The traditional asphalt coke pilot equipment mixes the raw asphalt with the circulating oil and heats it in a heating furnace. The raw material is transported from the pump inlet pipeline through the raw material pump and then enters the heating furnace for heating. The raw material is not stirred and the material is uneven, resulting in unstable feed volume and easy blockage of the pipeline and pump head, resulting in flow interruption. When the raw material pump has no flow, the entire pilot system becomes unstable and the pump can only be stopped to purge the pipeline with nitrogen and then re-feed. During the feeding process, the heating furnace tube maintains a high temperature throughout the process, which causes the coking of the material remaining in the tube to increase and the system pressure is too high and the experiment is forced to stop. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a low-cost pilot plant for producing pitch coke to solve the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a low-cost pilot plant for asphalt coke, comprising a raw material tank, a heating furnace tube fixedly mounted on the side of the raw material tank, a fixing frame fixedly mounted on the top of the raw material tank, an air inlet pipe fixedly sleeved on the inner wall of the fixing frame, an exhaust pipe arranged on the side of the air inlet pipe, and the outer edge of the exhaust pipe fixedly sleeved on the inner wall of the fixing frame, and the inner wall of the exhaust pipe passes through the inner wall of the fixing frame and is connected with the inner wall of the air inlet pipe, a main rod is rotatably connected to the inner wall of the raw material tank, and a stirring blade is fixedly mounted on the outer edge of the main rod near the bottom.

[0006] As a preferred technical solution of the utility model, the inner wall of the fixed frame is rotatably connected with an auxiliary rod, and the bottom of the auxiliary rod is fixedly assembled with the top of the main rod, and the outer edge of the auxiliary rod is fixedly sleeved with an air supply blade.

[0007] As a preferred technical solution of the utility model, the top of the inner wall of the raw material tank is fixedly equipped with a convex tooth group, the outer edge of the main rod near the top is fixedly sleeved with a connecting plate, the top of the connecting plate is rotatably connected to a driving gear, and the teeth on the outer edge of the driving gear are meshed with the teeth on the inner wall of the convex tooth group.

[0008] As a preferred technical solution of the utility model, a round rod is rotatably sleeved on the inner wall of the connecting plate, and the top of the round rod is fixedly assembled with the bottom of the driving gear, the bottom of the round rod is fixedly assembled with a rotating plate, and the bottom of the rotating plate is fixedly assembled with a stirring rod.

[0009] As a preferred technical solution of the utility model, the diameter of the inner wall of the heating furnace tube is 6mm, and the contact area between the inner wall of the heating furnace tube and the material is 28.26mm. 2 .

[0010] As a preferred technical solution of the utility model, the number of the driving gears is three, and the bottoms of the three driving gears are all rotatably connected to the top of the connecting plate, the number of the stirring rods is three, and the connection structure between the tops of the three stirring rods and the bottoms of the three driving gears is completely consistent.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The pilot plant of low-cost asphalt coke, through the coordinated use of the air inlet pipe and the exhaust pipe, uses the air inlet pipe to assist the outside gas to enter the interior of the fixed frame, so that the gas inside the air inlet pipe drives the air supply blade to rotate in the inner wall of the fixed frame, and the air supply blade drives the main rod to rotate through the auxiliary rod, and then the main rod drives the driving gear to rotate in the inner wall of the convex tooth group through the connecting plate, and then the driving gear drives the stirring rod to rotate through the round rod and the rotating plate, and then the stirring rod and the stirring blades are used to stably mix the inside of the raw material tank.

[0013] 2. The pilot plant of low-cost asphalt coke, through the installation of heating furnace tubes, the material flow rate in the heating furnace tubes is planned to be increased from 2.0m / s to 3m / s. The heating furnace tube design ensures that the length remains unchanged, and the inner diameter is adjusted from the original 8mm to 6mm, and the contact area is increased from 50.24mm 2 Reduced to 28.26mm 2 Taking the feed rate of asphalt and coking heavy oil as 3kg / h, the circulating oil density is 1.1467g / cm3, and the circulating oil flow rate can be calculated to be 101.8mL / s. The circulating oil flow rate in the furnace tube is converted from 2.0m / s to 3.6m / s, and the material flow rate in the heating furnace tube is increased by 80%, which effectively slows down the coking rate, improves the stability of the feed, and avoids the problem of discontinuous material processing.

[0014] 3. The pilot equipment of this low-cost asphalt coke extends the feeding time so that the device can meet the technical requirement of 36h feeding, effectively reduces the outer wall temperature of the furnace tube in the heating furnace by 5 to 10°C, alleviates coking, and effectively reduces the feed pump pressure from 2.5MPa to 2.0MPa, ensuring safe and stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the fixed frame of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the raw material tank of the utility model.

[0019] In the figure: 1. raw material tank; 2. heating furnace tube; 3. fixed frame; 4. air inlet pipe; 5. exhaust pipe; 6. main rod; 7. stirring blade; 8. auxiliary rod; 9. air supply blade; 10. convex tooth group; 11. connecting plate; 12. driving gear; 13. rotating plate; 14. stirring rod; 15. round rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 A low-cost pilot plant for asphalt coke comprises a raw material tank 1, a heating furnace tube 2 is fixedly mounted on the side of the raw material tank 1, a fixing frame 3 is fixedly mounted on the top of the raw material tank 1, an air inlet pipe 4 is fixedly sleeved on the inner wall of the fixing frame 3, an exhaust pipe 5 is arranged on the side of the air inlet pipe 4, and the outer edge of the exhaust pipe 5 is fixedly sleeved on the inner wall of the fixing frame 3, and the inner wall of the exhaust pipe 5 passes through the inner wall of the fixing frame 3 and is connected with the inner wall of the air inlet pipe 4, a main rod 6 is rotatably connected to the inner wall of the raw material tank 1, and a stirring blade 7 is fixedly mounted on the outer edge of the main rod 6 near the bottom, and the air inlet pipe 4 and the exhaust pipe 5 are used in coordination, and the air inlet pipe 4 and the exhaust pipe 5 are used to assist the stable circulation of external gas and the internal gas of the fixing frame 3, thereby assisting the main rod 6 to drive the stirring blade 7 to rotate stably.

[0022] In a preferred embodiment, the inner wall of the fixed frame 3 is rotatably connected to an auxiliary rod 8, and the bottom of the auxiliary rod 8 is fixedly assembled with the top of the main rod 6, and the outer edge of the auxiliary rod 8 is fixedly sleeved with an air supply blade 9. By adding the air supply blade 9, the internal gas of the air intake pipe 4 can enter the interior of the fixed frame 3, and the internal gas of the air intake pipe 4 can be used to push the air supply blade 9 to rotate, and then the air supply blade 9 is used to drive the main rod 6 to rotate stably through the auxiliary rod 8, and the main rod 6 is used to drive the stirring blade 7 to rotate, so that the stirring blade 7 is used to stably mix the raw materials inside the raw material tank 1.

[0023] In a preferred embodiment, a convex tooth group 10 is fixedly installed on the top of the inner wall of the raw material tank 1, a connecting plate 11 is fixedly sleeved on the outer edge of the main rod 6 near the top, and a driving gear 12 is rotatably connected to the top of the connecting plate 11, and the gear teeth on the outer edge of the driving gear 12 are meshed with the gear teeth on the inner wall of the convex tooth group 10. By using the convex tooth group 10 and the connecting plate 11 in coordination, the main rod 6 is used to drive the connecting plate 11 to rotate, and the connecting plate 11 is used to drive the driving gear 12 to rotate, and the convex tooth group 10 is used to assist the driving gear 12 in rotating while the connecting plate 11 rotates.

[0024] In a preferred embodiment, a round rod 15 is rotatably sleeved on the inner wall of the connecting plate 11, and the top of the round rod 15 is fixedly assembled with the bottom of the driving gear 12, the bottom of the round rod 15 is fixedly assembled with a rotating plate 13, and the bottom of the rotating plate 13 is fixedly assembled with a stirring rod 14. By cooperating with the rotating plate 13, the driving gear 12 is used to drive the rotating plate 13 to rotate, and then the rotating plate 13 is used to drive the stirring rod 14 to rotate, so that the stirring rod 14 and the stirring blades 7 are used to stably mix the raw materials.

[0025] In a preferred embodiment, the diameter of the inner wall of the heating furnace tube 2 is 6 mm, and the contact area between the inner wall of the heating furnace tube 2 and the material is 28.26 mm. 2 By adjusting the inner diameter of the heating furnace tube 2 from 8mm to 6mm, the contact area is increased from 50.24mm 2 Reduced to 28.26mm 2 , thereby helping to increase the material flow rate, thereby slowing down the coking rate and improving the stability of the feed.

[0026] In a preferred embodiment, the number of driving gears 12 is three, and the bottoms of the three driving gears 12 are all rotatably connected to the top of the connecting plate 11, the number of stirring rods 14 is three, and the connection structure between the tops of the three stirring rods 14 and the bottoms of the three driving gears 12 is completely consistent. By adding three driving gears 12, the main rod 6 is used to drive the three driving gears 12 to rotate stably through the connecting plate 11, and then the three driving gears 12 are used to drive the three stirring rods 14 to rotate stably.

[0027] Working principle: when the device is in use, the air inlet pipe 4 is used to assist the outside gas to enter the interior of the fixed frame 3, so that the internal gas of the air inlet pipe 4 is used to push the air supply blade 9 to rotate in the inner wall of the fixed frame 3, and the air supply blade 9 is used to drive the main rod 6 to rotate through the auxiliary rod 8, and then the main rod 6 is used to drive the driving gear 12 to rotate in the inner wall of the convex tooth group 10 through the connecting plate 11, and then the driving gear 12 is used to drive the stirring rod 14 to rotate through the round rod 15 and the rotating plate 13, and then the stirring rod 14 and the stirring blade 7 are used to stably mix the inside of the raw material tank 1.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-cost pitch coke pilot plant, comprising a raw material tank (1), characterized in that: A heating furnace tube (2) is fixedly mounted on the side of the raw material tank (1), a fixing frame (3) is fixedly mounted on the top of the raw material tank (1), an air inlet pipe (4) is fixedly sleeved on the inner wall of the fixing frame (3), an exhaust pipe (5) is arranged on the side of the air inlet pipe (4), and the outer edge of the exhaust pipe (5) is fixedly sleeved on the inner wall of the fixing frame (3), and the inner wall of the exhaust pipe (5) passes through the inner wall of the fixing frame (3) and is connected to the inner wall of the air inlet pipe (4), the inner wall of the raw material tank (1) is rotatably connected to a main rod (6), and a stirring blade (7) is fixedly mounted on the outer edge of the main rod (6) near the bottom.

2. The pilot plant of low-cost pitch coke according to claim 1, characterized in that: The inner wall of the fixed frame (3) is rotatably connected to an auxiliary rod (8), and the bottom of the auxiliary rod (8) is fixedly assembled with the top of the main rod (6), and the outer edge of the auxiliary rod (8) is fixedly sleeved with an air supply blade (9).

3. The pilot plant of low-cost pitch coke according to claim 1, characterized in that: A convex tooth group (10) is fixedly mounted on the top of the inner wall of the raw material tank (1), a connecting plate (11) is fixedly sleeved on the outer edge of the main rod (6) near the top, a driving gear (12) is rotatably connected to the top of the connecting plate (11), and the gear teeth on the outer edge of the driving gear (12) are meshed with the gear teeth on the inner wall of the convex tooth group (10).

4. A low-cost pitch coke pilot plant according to claim 3, characterized in that: A round rod (15) is rotatably sleeved on the inner wall of the connecting plate (11), and the top of the round rod (15) is fixedly assembled with the bottom of the driving gear (12), the bottom of the round rod (15) is fixedly assembled with a rotating plate (13), and the bottom of the rotating plate (13) is fixedly assembled with a stirring rod (14).

5. The pilot plant of low-cost pitch coke according to claim 1, characterized in that: The diameter of the inner wall of the heating furnace tube (2) is 6 mm, and the contact area between the inner wall of the heating furnace tube (2) and the material is 28.26 mm. 2 .

6. A pilot plant for producing low-cost pitch coke according to claim 4, characterized in that: The number of the driving gears (12) is three, and the bottoms of the three driving gears (12) are all rotatably connected to the top of the connecting plate (11); the number of the stirring rods (14) is three, and the connection structures of the tops of the three stirring rods (14) and the bottoms of the three driving gears (12) are completely consistent.

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