External semi-coil pipe type efficient reduction reaction tank
By designing an external semi-coil reduction reactor, combined with a multi-layer stirring structure and an optimized layout of the hydrogen inlet pipe, the space occupation and maintenance difficulties caused by the built-in coil are solved, achieving efficient heat transfer and reaction uniformity, and improving the hydrogenation reaction rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI HONGDINGHUA CHEM EQUIP CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional built-in coil reduction tanks suffer from space occupation and reaction interference, complex structure and difficult maintenance, affecting heat transfer efficiency and reaction uniformity, and posing safety hazards.
It adopts an external semi-coil design, combined with a multi-layer stirring structure of closed turbine and detachable oblique blade open turbine. The hydrogen inlet pipe is laid out with a 45° oblique cut close to the inner wall to achieve local temperature gradient control and uniform gas-liquid contact, thereby improving mixing efficiency and reaction rate.
It improves heat transfer efficiency, enhances reaction uniformity, reduces maintenance difficulty and safety risks, and increases the hydrogenation reaction rate by 25%.
Smart Images
Figure CN224180876U_ABST
Abstract
Description
An externally mounted semi-coil type high-efficiency reduction reactor Technical Field
[0001] This utility model relates to the field of reduction tanks, and in particular to the field of external coil reduction tank technology, specifically an externally mounted semi-coil type high-efficiency reduction reaction tank. Background Technology
[0002] In high-temperature reduction reaction equipment, the heat transfer structure of the reduction vessel directly affects the reaction efficiency and safety. Traditional technologies often employ jacketed or internal coil heating methods. While internal coils can increase the heat transfer area, they still have significant drawbacks:
[0003] 1. Space occupation and reaction interference: The inner coil needs to be embedded inside the tank, occupying the effective reaction space, which leads to obstruction of material flow, easy formation of local accumulation, and easy scaling or corrosion on the surface of the coil, affecting heat transfer efficiency and reaction uniformity.
[0004] 2. Complex structure and difficult maintenance: The internal coil is welded to the inner wall of the tank, which is a complex process and is prone to stress concentration. Under long-term high temperature and high pressure, it is easy to cause weld cracking or leakage risk. At the same time, the built-in structure makes maintenance difficult, requiring frequent shutdowns for disassembly, which increases operation and maintenance costs.
[0005] Based on the above problems, there is an urgent need for a new type of reduction tank structure that can improve heat transfer efficiency, optimize the space utilization of the reaction chamber and the reliability of the equipment, and solve the inherent maintenance problems and safety hazards of internal coil technology. Summary of the Invention
[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an external semi-coil type high-efficiency reduction reaction vessel to solve the difficulties of the prior art.
[0007] To achieve the above and other related objectives, this utility model provides an externally mounted semi-coil type high-efficiency reduction reaction vessel, comprising:
[0008] The cylinder 5 has an upper elliptical head 11 and a lower elliptical head 2 installed at its top and bottom, respectively.
[0009] The upper elliptical head 11 is provided with a feed inlet h and the bottom discharge port m is provided at the bottom flange 1 of the lower elliptical head 2.
[0010] Spray pipe assembly 12, which is installed on the top of cylinder 5;
[0011] A magnetic stirring drive component 13 is installed on the top flange 14 of the cylinder 5, and extends into the cylinder 5 below through a stirring rod 16 to contact the product to be stirred.
[0012] Hydrogen inlet pipe d, the top of which is connected to the upper elliptical end cap 11, and the bottom of which extends into the cylinder 5 until the lower elliptical end cap 2;
[0013] A semi-coil assembly is spirally wound around the outside of the cylinder 5 and the lower elliptical head 2, and an insulating liquid is introduced into the inside.
[0014] According to the preferred scheme, the bottom discharge port m is coaxially set with the lower elliptical head 2.
[0015] According to the preferred embodiment, a ladder 8 is also installed on the outer wall of the cylinder 5, and ear seats 10, grounding plates 9 and side wall lifting lugs 15 are also installed on both sides respectively.
[0016] According to the preferred embodiment, a baffle 6 and a baffle tie rod 7 are also installed on the outer wall of the cylinder 5.
[0017] According to the preferred embodiment, the stirring rod 16 is equipped with a closed turbine 17 and a detachable inclined blade open turbine 18 along the axial direction from top to bottom.
[0018] According to the preferred embodiment, the closed turbine 17 is provided with multiple sets.
[0019] According to the preferred embodiment, the half-coil assembly includes a cylindrical half-coil 4 and a head half-coil 3. The top height of the cylindrical half-coil 4 does not exceed one-third of the height of the cylindrical body 5, and the bottom is connected to the bottom end of the cylindrical body 5.
[0020] The end cap half-coil 3 is disposed outside the lower elliptical end cap 2.
[0021] According to the preferred scheme, four sets of cylindrical half-coils 4 are arranged in parallel, with two sets located at one-third of the height of the cylindrical body 5 and the other two sets located at two-thirds of the height of the cylindrical body 5.
[0022] According to the preferred embodiment, each set of cylindrical half-coils 4 is provided with its own cylindrical half-pipe inlets n1, n2, n3, n4 and cylindrical half-pipe outlets p1, p2, p3, p4.
[0023] According to the preferred scheme, two sets of end cap half coils 3 are arranged in parallel. The end cap half coil inlets n5 and n6 are opened at the top middle position, and the end cap outlets p5 and p6 are opened at the bottom and are set vertically downward.
[0024] According to the preferred embodiment, the hydrogen inlet pipe d is located inside the cylinder 5 and the lower elliptical head 2, and is bent and tightly attached to the cylinder 5 and the lower elliptical head 2.
[0025] According to the preferred embodiment, the bottom opening of the hydrogen inlet pipe d is cut at a 45° angle.
[0026] This invention achieves local temperature gradient control through a partitioned semi-coil design. In addition, it forms a multi-layer stirring structure by combining a closed turbine with a detachable oblique blade open turbine. The closed turbine enhances shear force, while the oblique blade turbine promotes axial circulation, making it suitable for materials with high solid content or high viscosity and improving mixing efficiency. Furthermore, the 45° oblique cut design of the hydrogen inlet pipe, combined with its close-fitting layout to the inner wall, allows the hydrogen to be evenly dispersed in the form of small bubbles, increasing the gas-liquid contact area by more than 2 times and improving the hydrogenation reaction rate by 25%.
[0027] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description
[0028] Figure 1 shows a schematic diagram of this utility model;
[0029] Figure 2 shows a top view of this utility model;
[0030] Figure 3 shows a partial enlarged view of the hydrogen inlet pipe in this utility model;
[0031] Label Explanation
[0032] 1. Lower flange; 2. Lower elliptical head; 3. Head half-coil; 4. Shell half-coil; 5. Shell; 6. Baffle; 7. Baffle tie rod; 8. Ladder; 9. Grounding plate; 10. Ear seat; 11. Upper elliptical head; 12. Spray pipe assembly; 13. Magnetic stirring drive component; 14. Upper flange; 15. Side wall lifting lug; 16. Stirring rod; 17. Closed turbine; 18. [Unclear - possibly related to a specific component]
[0033] Detachable blade open-type turbine;
[0034] d, Hydrogen inlet pipe; h, Feed inlet; m, Bottom drain port; n1, n2, n3, n4, Inlet of cylindrical half-pipe; p1, p2, p3, p4, Outlet of cylindrical half-pipe; n5, n6, Inlet of end cap half-pipe; p5, p6, Outlet of end cap pipe. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages 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. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0036] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.
[0038] This invention proposes an externally mounted semi-coil type high-efficiency reduction reaction vessel for use in reduction tank processes. This invention does not limit the type of liquid, but the structure of this externally mounted semi-coil type high-efficiency reduction reaction vessel is particularly suitable for processes where the feed includes hydrogen.
[0039] Overall, the externally mounted semi-coil type high-efficiency reduction reactor proposed in this utility model mainly includes a cylinder 5, a feed inlet h and a bottom drain m, a spray pipe assembly 12, a magnetic stirring drive 13, a hydrogen inlet pipe d, and a semi-coil assembly. Figure 1 illustrates the arrangement of the cylinder 5, feed inlet h and bottom drain m, spray pipe assembly 12, magnetic stirring drive 13, hydrogen inlet pipe d, and semi-coil assembly.
[0040] To achieve the goal of adapting to hydrogen gas within the reduction reactor, and addressing the issue in the background technology that the heat transfer structure of the reduction reactor directly affects reaction efficiency and safety in high-temperature reduction reaction equipment, traditional technologies often employ jacketed or built-in coil heating methods. While the internal coil can increase the heat transfer area, it still has significant drawbacks: 1. Space occupation and reaction interference: The internal coil needs to be embedded inside the tank, occupying effective reaction space, leading to obstructed material flow, easy formation of local accumulation, and easy scaling or corrosion on the coil surface, affecting heat transfer efficiency and reaction uniformity; 2. Complex structure and difficult maintenance: The internal coil is welded to the inner wall of the tank, which is complex in process and prone to stress concentration, especially under long-term high temperature and high pressure. The internal structure of the turbine can easily lead to weld cracking or leakage. Furthermore, the built-in structure makes maintenance difficult, requiring frequent shutdowns and disassembly, increasing maintenance costs. Therefore, the technical solution provided in this embodiment achieves local temperature gradient control through a partitioned semi-coil design. In addition, a multi-layer stirring structure is formed by combining a closed turbine with a detachable inclined blade open turbine. The closed turbine enhances shear force, while the inclined blade turbine promotes axial circulation, making it suitable for materials with high solids content or high viscosity, thus improving mixing efficiency. Furthermore, the 45° oblique cut design of the hydrogen inlet pipe, combined with its close-fitting inner wall layout, allows hydrogen to be evenly dispersed in the form of small bubbles, increasing the gas-liquid contact area by more than two times and improving the hydrogenation reaction rate by 25%.
[0041] As shown in Figure 1, the cylinder 5 is a vertical cylindrical structure with an upper elliptical head 11 welded to the top and a lower elliptical head 2 welded to the bottom. The upper elliptical head 11 has a feed inlet h at its center, and the lower flange 1 at the bottom of the lower elliptical head 2 is coaxially provided with a bottom drain port m to ensure smooth discharge without residue. In addition, the bottom drain port m coincides with the axis of the lower elliptical head 2 to avoid dead corners for liquid accumulation.
[0042] Next, the spray pipe assembly 12 is installed on the top of the cylinder 5, and the liquid is sprayed evenly through the multi-hole distributor for liquid spraying or cleaning during the reaction process; the magnetic stirring drive 13 is fixed at the upper flange 14 at the top of the cylinder 5, and the stirring rod 16 extends axially to the bottom of the cylinder, with a closed turbine 17 and a detachable inclined blade open turbine 18 installed at the end. Two sets of closed turbines 17 are provided and distributed at intervals on the stirring rod 16 to enhance the shear force; the detachable inclined blade turbine 18 is located at the bottom to achieve efficient stirring of materials and facilitate disassembly and cleaning.
[0043] Based on this, the hydrogen inlet pipe d is inserted from the top of the upper elliptical head 11, and is bent and tightly attached to the inner wall of the cylinder 5 and the lower elliptical head 2. The bottom opening is cut at a 45° angle to optimize hydrogen diffusion. Preferably, the 45° cut design of the hydrogen inlet pipe d allows hydrogen to enter the reaction zone in a tangential flow. Combined with the curved path that is tightly attached to the inner wall of the tank, the gas is evenly diffused along the wall, avoiding excessively high local concentrations.
[0044] It should be specifically noted that the semi-coil assembly includes a cylindrical semi-coil 4 and a head semi-coil 3, both of which adopt a spiral wound external design. The cylindrical semi-coil 4 is divided into four groups, with two groups located at 1 / 3 of the height of the cylindrical body 5 and the other two groups located at 2 / 3. Each group has an independent cylindrical semi-coil inlet n1, n2, n3, n4 and a cylindrical semi-coil outlet p1, p2, p3, p4. Correspondingly, the head semi-coil 3 is divided into two groups, with its head semi-coil inlet n5, n6 located at the top center and its head tube outlet p5, p6 vertically downward for introducing heat transfer oil or steam for temperature control.
[0045] Furthermore, the inlets n1, n2, n3, n4 and outlets p1, p2, p3, p4 of the four sets of cylindrical half-coils 4 are connected in parallel to support segmented temperature control: the upper half-coil is circulated with a low-temperature medium to prevent the top material from overheating, and the lower half-coil is circulated with a high-temperature medium to accelerate the bottom reaction; in addition, the outlets p5 and p6 of the end cap half-coil 3 are arranged vertically downward to prevent condensate accumulation and ensure heat exchange stability.
[0046] As mentioned above, a ladder 8, lug 10, grounding plate 9, and side wall lifting lug 15 are added to the outside of the cylinder 5 to improve the safety of equipment operation and the convenience of hoisting. In addition, baffles 6 and baffle tie rods 7 are welded to the inner wall of the cylinder 5 to suppress material swirling and enhance mixing efficiency. Multiple sets of closed turbines 17 are installed in sections on the stirring rod 16, which, together with the detachable inclined blade open turbine 18 at the bottom, form a stepped mixing flow field, which is suitable for the uniform reduction of high viscosity materials.
[0047] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An externally mounted semi-coil type high-efficiency reduction reaction vessel, characterized in that, include: The cylinder (5) has an upper elliptical head (11) and a lower elliptical head (2) installed at its top and bottom, respectively; a feed inlet (h) and a bottom drain outlet (m), wherein the upper elliptical head (11) is provided with a feed inlet (h) and the lower elliptical head (2) is provided with a bottom drain outlet (m) at its bottom lower flange (1); a spray pipe assembly (12), wherein the spray pipe assembly (12) is installed at the top of the cylinder (5); and a magnetic stirring transmission component (13), wherein the magnetic stirring... The mixing drive component (13) is installed on the top flange (14) of the cylinder (5), and extends into the cylinder (5) below through the stirring rod (16) to contact the product to be stirred; the hydrogen inlet pipe (d) is connected at the top to the upper elliptical head (11) and extends into the cylinder (5) to the lower elliptical head (2); the half-coil assembly is spirally wound around the outside of the cylinder (5) and the lower elliptical head (2), and the interior is filled with heat-insulating liquid.
2. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 1, characterized in that, The stirring rod (16) is equipped with a closed turbine (17) and a detachable oblique blade open turbine (18) along the axial direction from top to bottom.
3. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 2, characterized in that, The half-coil assembly includes a cylindrical half-coil (4) and a head half-coil (3). The top height of the cylindrical half-coil (4) does not exceed one-third of the height of the cylindrical body (5), and the bottom is connected to the bottom end of the cylindrical body (5). The head half-coil (3) is disposed outside the lower elliptical head (2).
4. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 3, characterized in that, The cylindrical half-coil (4) is arranged in four parallel groups, two of which are located at one-third of the height of the cylindrical body (5), and the other two are located at two-thirds of the height of the cylindrical body (5).
5. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 4, characterized in that, The end cap half-coil (3) is arranged in two parallel sets. The end cap half-coil inlet (n5, n6) of the end cap half-coil (3) is opened at the top middle position, and the end cap outlet (p5, p6) is opened at the bottom and is set vertically downward.
6. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 5, characterized in that, The hydrogen inlet pipe (d) is located inside the cylinder (5) and the lower elliptical head (2), and is bent and tightly attached to the cylinder (5) and the lower elliptical head (2).
7. The externally mounted semi-coil type high-efficiency reduction reactor according to claim 6, characterized in that, The bottom opening of the hydrogen inlet pipe (d) is cut at 45°.