A corrosion-resistant microchannel reactor for silicone oil synthesis

Abstract

This utility model relates to the field of chemical equipment technology and discloses a corrosion-resistant microchannel reactor for silicone oil synthesis. It includes multiple sets of central reaction modules and two sets of edge reaction modules, which are stacked together. Multiple corresponding serpentine flow channels are provided on both sides of the central reaction modules and on one side of the edge reaction modules. Inlets and outlets are located at both ends of the serpentine flow channels, and micropillars are arranged inside the serpentine flow channels. The structure of the central and edge reaction modules includes a nickel-based alloy substrate and an inner wall of a yttrium oxide-stabilized zirconia ceramic coating. The advantages of this utility model compared to existing technologies are: the yttrium oxide-stabilized zirconia ceramic coating is bonded to the nickel-based alloy substrate through plasma spraying, solving the problem of easy peeling of traditional coatings; the serpentine flow channel and micropillar array design balances low resistance and efficient mixing.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a corrosion-resistant microchannel reactor for silicone oil synthesis. Background Technology

[0002] In the production of high-performance vinyl-terminated dimethyl silicone oil, methyl silicone oil production typically uses dimethyldichlorosilane as a starting material. This is achieved through hydrolysis to produce dimethylsilanol, which is then dehydrated and condensed to form a polysiloxane structure. The silicone oil synthesis process often involves strong acids (such as concentrated sulfuric acid), strong alkalis, or high-temperature corrosive media. Traditional reactors are prone to corrosion and have low mass / heat transfer efficiency. While microchannel reactors can improve efficiency, ordinary materials (such as 316L stainless steel) are difficult to withstand long-term corrosion. In existing technologies, Hastelloy or titanium alloy reactors are too expensive, and PTFE coatings are prone to peeling. Furthermore, microchannels use straight channels to reduce resistance, resulting in low mixing efficiency.

[0003] To address the aforementioned technical problems, this application proposes a corrosion-resistant microchannel reactor for silicone oil synthesis. Utility Model Content

[0004] I. Technical problems to be solved

[0005] The technical problem this invention aims to solve is that Hastelloy or titanium alloy reactors are too expensive, and PTFE coatings are prone to peeling. In addition, microchannels use straight channels to reduce resistance, resulting in low mixing efficiency.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a corrosion-resistant microchannel reactor for silicone oil synthesis, comprising multiple sets of central reaction modules and two sets of edge reaction modules, wherein the multiple sets of central reaction modules and the two sets of edge reaction modules are stacked, and multiple sets of corresponding serpentine channels are respectively provided on both sides of the central reaction modules and on one side of the edge reaction modules, wherein the two ends of the serpentine channels are respectively provided with inlets and outlets, and microcolumns are provided inside the serpentine channels;

[0008] The structure of the central reaction module and the edge reaction module includes a nickel-based alloy substrate and an inner wall with a yttrium oxide-stabilized zirconia ceramic coating.

[0009] As an improvement, the inner wall of the serpentine channel is coated with a nano-SiO2 hydrophobic coating.

[0010] As an improvement, the multiple sets of the serpentine channels are arranged in parallel or diamond-shaped staggered patterns.

[0011] As an improvement, the micropillar array is arranged inside the serpentine flow channel and is cylindrical or teardrop-shaped.

[0012] As an improvement, the outer sides of the multiple sets of central reaction modules and the two sets of edge reaction modules are equipped with housings, and flanges are installed at both ends of the housings.

[0013] As an improvement, multiple sets of pipes are installed on the housing.

[0014] III. Beneficial Effects

[0015] The advantages of this invention compared with the prior art are as follows: the yttrium oxide stabilized zirconia ceramic coating is combined with the nickel-based alloy substrate by plasma spraying, which solves the problem of easy peeling of traditional coatings; the serpentine flow channel and micro-pillar array design take into account both low resistance and high efficiency mixing, and the nano-SiO2 hydrophobic coating on the inner wall of the serpentine flow channel reduces silicone oil adhesion and reduces the cleaning frequency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a corrosion-resistant microchannel reactor for silicone oil synthesis according to this utility model.

[0017] Figure 2 This is a schematic diagram of the reaction module structure of a corrosion-resistant microchannel reactor for silicone oil synthesis according to this utility model.

[0018] Figure 3 This is a schematic diagram of the central reaction module structure of a corrosion-resistant microchannel reactor for silicone oil synthesis according to this utility model.

[0019] Figure 4 This is a schematic diagram of the edge reaction module structure of a corrosion-resistant microchannel reactor for silicone oil synthesis according to this utility model.

[0020] Figure 5 This is a schematic diagram of the reaction module structure of a corrosion-resistant microchannel reactor for silicone oil synthesis according to this utility model.

[0021] As shown in the figure: 1. Central reaction module; 101. Nickel-based alloy substrate; 102. Inner wall of yttrium oxide stabilized zirconia ceramic coating; 2. Edge reaction module; 3. Inlet; 4. Outlet; 5. Serpentine flow channel; 6. Micro-column; 7. Shell; 8. Flange; 9. Connecting pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] As attached Figure 1 and attached Figure 2As shown, a corrosion-resistant microchannel reactor for silicone oil synthesis includes multiple sets of central reaction modules 1 and two sets of edge reaction modules 2. The multiple sets of central reaction modules 1 and the two sets of edge reaction modules 2 are stacked for easy disassembly and cleaning. A shell 7 is installed on the outside of the multiple sets of central reaction modules 1 and the two sets of edge reaction modules 2. Flanges 8 are installed at both ends of the shell 7, and the feed inlet and discharge outlet of the microchannel reactor are connected to the corresponding equipment through the flanges 8. Two sets of pipes 9 are installed on the shell 7, which are the cooling fluid inlet and cooling fluid outlet. The shell 7 integrates aluminum heat dissipation fins and a PID temperature control module, with a temperature control accuracy of ±1℃.

[0024] As attached Figure 3 and attached Figure 4 As shown, the central reaction module 1 has multiple sets of corresponding serpentine channels 5 on both sides and the edge reaction module 2 on one side. The two ends of the serpentine channels 5 are respectively provided with inlet 3 and outlet 4. The multiple sets of serpentine channels 5 are arranged in parallel or diamond-shaped staggered arrangement. Micro-pillars 6 are provided inside the serpentine channels 5. The micro-pillars 6 are arranged in an array inside the serpentine channels 5 and are cylindrical or teardrop-shaped with blunt heads and tapering tails. The serpentine channels 5 and micro-pillars 6 disrupt laminar flow, enhance turbulence, and improve mass transfer efficiency.

[0025] As attached Figure 5 As shown, the structure of the central reaction module 1 and the edge reaction module 2 includes a nickel-based alloy substrate 101 and an inner wall 102 with a yttrium oxide-stabilized zirconia ceramic coating, providing double corrosion protection and improving the lifespan of the central reaction module 1. The inner wall of the serpentine flow channel 5 is coated with a nano-SiO2 hydrophobic coating to reduce silicone oil residue.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A corrosion-resistant microchannel reactor for silicone oil synthesis, comprising multiple sets of central reaction modules (1) and two sets of edge reaction modules (2), characterized in that: Multiple sets of central reaction modules (1) and two sets of edge reaction modules (2) are stacked together. Multiple sets of corresponding serpentine channels (5) are provided on both sides of the central reaction module (1) and on one side of the edge reaction module (2). The two ends of the serpentine channels (5) are respectively provided with inlet (3) and outlet (4). Micro-columns (6) are provided inside the serpentine channels (5). The structure of the central reaction module (1) and the edge reaction module (2) includes a nickel-based alloy substrate (101) and an inner wall (102) with a yttrium oxide-stabilized zirconia ceramic coating.

2. The corrosion-resistant microchannel reactor for silicone oil synthesis according to claim 1, characterized in that: The inner wall of the serpentine channel (5) is coated with a nano-SiO2 hydrophobic coating.

3. The corrosion-resistant microchannel reactor for silicone oil synthesis according to claim 2, characterized in that: The multiple sets of serpentine channels (5) are arranged in parallel or diamond-shaped staggered patterns.

4. The corrosion-resistant microchannel reactor for silicone oil synthesis according to claim 3, characterized in that: The micropillars (6) are arranged in an array inside the serpentine channel (5) and are cylindrical or teardrop-shaped.

5. The corrosion-resistant microchannel reactor for silicone oil synthesis according to claim 1, characterized in that: Multiple sets of central reaction modules (1) and two sets of edge reaction modules (2) are equipped with housings (7) on their outer sides, and flanges (8) are installed at both ends of the housings (7).

6. The corrosion-resistant microchannel reactor for silicone oil synthesis according to claim 5, characterized in that: Multiple sets of connecting pipes (9) are installed on the housing (7).

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