Equipment for improving uniformity of catalyst in slurry reactor feeding
By designing the catalyst feed branch pipe, residue oil feed pipe, and spiral structure in the mixer, the problem of uneven catalyst distribution in slurry bed heavy oil hydrocracking was solved, achieving uniform mixing of catalyst and residue oil, and improving reaction efficiency and unit operation stability.
Patent Information
- Application Number
- CN202423014457.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-07
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-07
AI Technical Summary
In the slurry bed heavy oil hydrocracking process, the catalyst is unevenly distributed in the mixed feed, which affects the reaction process and product yield, and also causes problems with the unit's operating cycle.
Design a device including a mixing tank and a mixer. The mixer consists of a cone, a column and an outlet. It is equipped with a catalyst feed branch pipe, a residue oil feed pipe, guide vanes and a spiral body. The catalyst and residue oil are uniformly mixed through the spiral channel. Safety is ensured by combining it with a medium and low pressure steam pipe.
This process achieves thorough mixing of the catalyst and residual oil, forming a homogeneous phase, eliminating uneven distribution, improving reaction efficiency, reducing the amount of finished catalyst used, lowering production costs, avoiding pipeline blockage, and ensuring normal operation of the unit.
Smart Images
Figure CN223505257U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of petrochemical technology, specifically to a device for improving the uniformity of catalyst in slurry bed feed. Background Technology
[0002] Slurry-bed heavy oil hydrocracking technology has virtually no limitations on feedstock properties, exhibiting strong feedstock adaptability. It can process even lower-quality residue feedstocks, including those with a metal (Ni+V) mass fraction of over 750 μg / g and residual carbon content of over 25%, with a very high conversion rate (over 90%), maximizing residue oil conversion. However, the reaction system contains three phases: gas, liquid, and solid. The catalyst is an oil-soluble nanoscale metal substance; therefore, the catalyst distribution directly affects the reaction progress, product yield, and the overall operating cycle of the unit. Thus, to improve the catalyst uniformity in the reaction mixture feed, it is necessary to design equipment to enhance catalyst uniformity in slurry-bed feed. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a device to improve the uniformity of catalyst in slurry bed feed, thus solving the problem of uneven catalyst distribution in mixed feed.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A device for improving catalyst uniformity in slurry bed feed includes a mixing tank and a mixer. The mixer comprises an integrally formed cone, a column, and an outlet. A catalyst feed branch pipe and a residue oil feed pipe are connected to the cone; the feed branch pipe delivers the catalyst into the cone, and the residue oil feed pipe delivers residue oil into the cone. A guide vane is provided on the inner wall of the column near the cone to rectify the liquid delivered from the cone. A spiral is provided within the column to form a spiral channel, allowing the rectified liquid to flow through the spiral channel, further ensuring uniform catalyst distribution in the residue oil. The outlet is connected to the mixing tank to deliver the fully mixed liquid phase to the mixing tank. This structural design enables thorough mixing of residue oil and liquid catalyst to form a homogeneous phase, solving the problem of uneven catalyst distribution in existing mixing tank feeds.
[0006] Furthermore, the catalyst feed branch pipes are provided in two or more, evenly distributed on the cone, and all are connected to the catalyst feed main pipe, so that the catalyst can be quickly mixed with the oil residue and the mixing uniformity can be improved.
[0007] Furthermore, the catalyst feed branch pipe is provided with three branches.
[0008] Furthermore, a slope is provided at the other end of the column, and the slope is connected to the outlet to allow the fully mixed liquid phase to flow out smoothly.
[0009] Furthermore, a medium-pressure steam pipe is connected to the cone.
[0010] Furthermore, a low-pressure steam pipe is connected to the cone.
[0011] Furthermore, the low-pressure steam pipe is connected to the medium-pressure steam pipe. By introducing medium- and low-pressure steam, it can be cut off and purged during mixer maintenance to ensure operational safety.
[0012] Technical effects of this utility model:
[0013] Compared with the prior art, the device of this utility model for improving the uniformity of catalyst in slurry bed feed can fully mix the residue oil and liquid catalyst to form a homogeneous phase, thereby eliminating the problem of uneven catalyst distribution in the mixed feed from the front end of the reaction and ensuring the smooth progress of the reaction. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structural principle of the device for improving the uniformity of catalyst in slurry bed feed according to this utility model.
[0015] In the diagram, 1. Mixing tank; 2. Mixer; 3. Cone; 4. Column; 5. Outlet; 6. Feed branch pipe; 7. Residual oil feed pipe; 8. Guide vane; 9. Spiral; 10. Feed main pipe; 11. Slope; 12. Medium-pressure steam pipe; 13. Low-pressure steam pipe. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0017] Example 1:
[0018] like Figure 1 As shown in the figure, this embodiment relates to a device for improving the uniformity of catalyst in slurry bed feed, which includes a mixing tank 1 and a mixer 2; the mixer 2 includes an integrally formed cone 3, a column 4 and an outlet 5.
[0019] The cone 3 is connected to a residue oil feed pipe 7 and three catalyst feed branch pipes 6. These three catalyst feed branch pipes 6 are evenly distributed on the cone 3 and are all connected to the catalyst feed main pipe 10, allowing the catalyst to be delivered into the cone 3 and rapidly mixed with the oil residue, improving mixing uniformity. The cone 3 is also connected to a medium-pressure steam pipe 12 and a low-pressure steam pipe 13. Specifically, the low-pressure steam pipe 13 can be connected to the medium-pressure steam pipe 12. By introducing medium- and low-pressure steam, it can be cut off and purged during maintenance of the mixer 2, ensuring operational safety.
[0020] A guide vane 8 is provided on the inner wall of the column 4 near the cone 3 to rectify the liquid transported from the cone 3. A spiral 9 is provided inside the column 4 to form a spiral channel. The rectified liquid flows through the spiral channel, further ensuring the catalyst is evenly distributed in the oil residue. A slope 11 is provided at the other end of the column 4, which is connected to the outlet 5 to allow the fully mixed liquid phase to flow out smoothly.
[0021] The outlet 5 is connected to the mixing tank 1, and the fully mixed liquid phase is transported to the mixing tank 1.
[0022] This invention enables the residual oil and liquid catalyst to be fully mixed to form a homogeneous phase, which is then introduced into the mixing tank 1. This eliminates the problem of uneven catalyst distribution in the mixed feed from the front end of the reaction, greatly improving the uniformity and distribution effect of the catalyst in the oil, making the catalytic reaction smoother, further reducing the amount of finished catalyst used, reducing production and processing costs, improving economic efficiency, and also reducing the amount of metal catalyst injected, thereby reducing the metal content in the system, effectively avoiding pipeline blockage caused by deposition, and ensuring normal operation of the equipment.
[0023] The above-described specific embodiments are merely specific examples of this utility model. The patent protection scope of this utility model includes, but is not limited to, the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of this utility model should fall within the patent protection scope of this utility model.
Claims
1. A device for improving the uniformity of catalyst in slurry bed feed, characterized in that, It includes a mixing tank and a mixer; the mixer includes an integrally formed cone, a column and an outlet; the cone is connected to a catalyst feed branch pipe and a residue oil feed pipe; the inner wall of the column is provided with a guide vane on the side near the cone; a spiral body is provided in the column to form a spiral channel in the column; the outlet is connected to the mixing tank.
2. The equipment for improving catalyst uniformity in slurry bed feed according to claim 1, characterized in that, The catalyst feed branch pipe is provided in two or more parts, evenly distributed on the cone.
3. The equipment for improving catalyst uniformity in slurry bed feed according to claim 1, characterized in that, The catalyst feed branch pipe is provided in three parts.
4. The equipment for improving catalyst uniformity in slurry bed feed according to claim 1, characterized in that, The other end of the column is provided with a slope, which is connected to the outlet.
5. The apparatus for improving catalyst uniformity in slurry bed feed according to any one of claims 1-4, characterized in that, A medium-pressure steam pipe is connected to the cone.
6. The equipment for improving catalyst uniformity in slurry bed feed according to claim 5, characterized in that, A low-pressure steam pipe is connected to the cone.
7. The apparatus for improving catalyst uniformity in slurry bed feed according to claim 6, characterized in that, The low-pressure steam pipe is connected to the medium-pressure steam pipe.