A stirred reactor

Abstract

This invention provides a stirred reactor, relating to the field of mechanical stirred reactor technology. The stirred reactor includes: an inner cylinder, an outer cylinder, and a motor; the inner and outer cylinders are coaxially nested; a gap exists between the inner and outer cylinders; the gap is used to accommodate the materials to be mixed; the inner cylinder is connected to the motor; the outer surface of the inner cylinder is patterned; the motor drives the inner cylinder to rotate. This invention increases the specific surface area by creating patterns on the inner cylinder, thereby improving the uniformity and efficiency of material mixing.

Description

Technical Field

[0001] This invention relates to the field of mechanically stirred reactor technology, and in particular to a stirred reactor. Background Technology

[0002] Chemical reaction studies often require the mixing of multiple materials. Mechanically stirred reactors are commonly used devices for material mixing. However, traditional mechanically stirred reactors have the characteristics of small specific surface area, insufficient shear stress, and little destructive effect on materials, resulting in problems such as uneven material mixing, low mixing efficiency, and long reaction time. Summary of the Invention

[0003] The purpose of this invention is to provide a stirred reactor that can improve the uniformity and efficiency of material mixing.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A stirred reactor, comprising:

[0006] Inner cylinder, outer cylinder, and motor;

[0007] The inner cylinder and the outer cylinder are coaxially nested; there is a gap between the inner cylinder and the outer cylinder; the gap is used to accommodate the materials to be mixed.

[0008] The inner cylinder is connected to the motor; the outer surface of the inner cylinder is patterned; the motor is used to drive the inner cylinder to rotate.

[0009] Optionally, the boundary of the cross-section of the inner cylinder is a corrugated structure.

[0010] Optionally, the cross-sectional boundary of the inner cylinder is:

[0011] R(θ)=r i +h cos(nθ); 0≤θ≤2π

[0012] In the formula, r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure, n as the number of tangential sine peaks, and θ as the angular coordinate.

[0013] Optionally, the cross-sectional boundary of the inner cylinder is:

[0014] R(θ, z) = r i +h cos(nθ)cos(nz / r i ); 0≤θ≤2π 0≤z≤98mm

[0015] In the formula, r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure, n as the number of tangential sine peaks, z as the axial coordinate, and θ as the angular coordinate.

[0016] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] This invention provides a stirred reactor, comprising: an inner cylinder, an outer cylinder, and a motor; the inner and outer cylinders are coaxially nested; a gap exists between the inner and outer cylinders; the gap is used to accommodate materials to be mixed; the inner cylinder is connected to the motor; the outer surface of the inner cylinder is patterned; the motor drives the inner cylinder to rotate. This invention increases the specific surface area by creating patterns on the inner cylinder, thereby improving the uniformity and efficiency of material mixing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the stirred reactor structure in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the inner cylinder structure in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the corrugated structure at the boundary of the cross section in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the stirred reactor structure in Embodiment 2 of the present invention;

[0023] Figure 5 This is a schematic diagram of the inner cylinder structure in Embodiment 2 of the present invention;

[0024] Figure 6 This is a schematic diagram of the corrugated structure at the boundary of the cross section in Embodiment 2 of the present invention;

[0025] Figure 7 This is a schematic diagram comparing the average turbulent kinetic energy of materials mixed in different reactors in Example 2 of the present invention.

[0026] Figure 8 This is a schematic diagram comparing the separation index of materials mixed in different reactors in Example 2 of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The purpose of this invention is to provide a stirred reactor that can improve the uniformity and efficiency of material mixing.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment provides a stirred reactor, including: an inner cylinder, an outer cylinder, and a motor; the inner cylinder and the outer cylinder are coaxially nested; there is a gap between the inner cylinder and the outer cylinder; the gap is used to accommodate the materials to be mixed; the inner cylinder is connected to the motor; the outer surface of the inner cylinder is provided with a pattern; the motor is used to drive the inner cylinder to rotate.

[0032] like Figure 2 and Figure 3 The cross-sectional boundary of the inner cylinder has a corrugated structure. Specifically, the cross-sectional boundary of the inner cylinder is as follows:

[0033] R(θ)=r i +h cos(nθ); 0≤θ≤2π.

[0034] In the formula, r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure, n as the number of tangential sine peaks, and θ as the angular coordinate.

[0035] Example 2

[0036] like Figure 4 This embodiment provides a stirred reactor, which differs from Embodiment 1 in that, as shown in the following... Figure 5 and Figure 6 In this embodiment, the cross-sectional boundary of the inner cylinder is:

[0037] R(θ, z) = r i +h cos(nθ)cos(nz / r i ); 0≤θ≤2π, 0≤z≤98mm.

[0038] In the formula, r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure, n as the number of tangential sine peaks, z as the axial coordinate, and θ as the angular coordinate.

[0039] The turbulent kinetic energy of the mixture in the stirred reactor (N40) of Example 1, the stirred reactor (NZ40) of Example 2, and the conventional reactor (smooth) is compared to, for example... Figure 7 As shown, Figure 7 In this context, Re represents the Reynolds number, and K represents the turbulent kinetic energy. It can be seen that the turbulent kinetic energy of the two sinusoidal wall inner cylinders is greater than that of the smooth inner cylinder, and the difference increases with the Reynolds number. When the Reynolds number is 2498, the turbulent kinetic energy of the two sinusoidal wall inner cylinders is three times that of the smooth inner cylinder. The separation index can quantitatively characterize the quality of micro-mixing: the smaller the separation index, the better the micro-mixing. The separation indices of the mixtures from the stirred reactor (N40) in Example 1, the stirred reactor (NZ40) in Example 2, and the conventional reactor (smooth) are shown below. Figure 8 As shown, Figure 8 The horizontal axis represents rotation speed in rpm, and the vertical axis represents the separation index (Xs). It can be seen that the separation index of the two sinusoidal inner cylinders is smaller than that of the smooth inner cylinder, indicating that the micro-mixing efficiency is higher.

[0040] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0041] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the device and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A stirred reactor, characterized in that, include: Inner cylinder, outer cylinder, and motor; The inner cylinder and the outer cylinder are coaxially nested; there is a gap between the inner cylinder and the outer cylinder; the gap is used to accommodate the materials to be mixed. The inner cylinder is connected to the motor; the outer surface of the inner cylinder is patterned; the motor is used to drive the inner cylinder to rotate. The boundary of the cross-section of the inner cylinder is a corrugated structure; The inner cylinder includes two types. The first type of inner cylinder has a cross-sectional boundary of: R(θ) = r i +hcos(nθ); 0≤θ≤2π; where r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure; n is the number of tangential sine peaks, and θ represents the angular coordinate. The cross-sectional boundary of the inner cylinder described in the second type is: R(θ, z) = r i +hcos(nθ)cos(nz / r i ); 0≤θ≤2π, 0≤z≤98mm; where r i denoted as the inner cylinder radius, h as the half-amplitude of the corrugated structure, n as the number of tangential sinusoidal peaks, z as the axial coordinate, and θ as the angular coordinate. The turbulent kinetic energy of the two types of inner cylinders is three times that of the smooth inner cylinder; the separation index of the two types of inner cylinders is smaller than that of the smooth inner cylinder, and the micro-mixing efficiency is higher than that of the smooth inner cylinder.

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