Tubular static mixer

Abstract

The utility model relates to a tubular static mixer. Comprising a tubular mixer main body and a plurality of mixing units which are sequentially arranged along the axial direction of the mixer main body, each group of mixing units comprises a group of spiral twisted blades and a splitter plate; the screw pitch and the twisting angle of the twisted blade are dynamically adjusted according to the fluid viscosity; a left-handed structure and a right-handed structure are arranged at the two ends of the mixing unit respectively and are connected in a cross shape through clamping grooves to form four flow channels; adjustable connectors are arranged at the two ends of each mixing unit and are used for adjusting the distance between the mixing units or replacing the modularized mixing units. The problems that in the prior art, a tubular static mixer still has a certain improvement space in the aspects of mixing efficiency, applicable fluid type range, blockage prevention and the like, for example, when some fluids with large viscosity difference are mixed, ideal mixing uniformity is difficult to achieve, meanwhile, a mixing element is prone to blockage, and the mixing efficiency is poor are solved. And normal operation of equipment is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of static mixer especially relates to a tubular static mixer. BACKGROUND

[0002] In many industrial fields such as chemical industry, food, environmental protection, it is often necessary to uniformly mix two or more fluids. The traditional mixing method such as stirring mixer can realize the mixing effect, but has the shortcomings such as large equipment volume, high energy consumption and complex maintenance. The tubular static mixer has obvious advantages in saving space and energy due to no external power driving and simple structure, and is gradually widely applied. However, the existing tubular static mixer still has certain improvement space in mixing efficiency, applicable fluid type range and prevention of blockage, for example, when mixing some fluids with large viscosity difference, it is difficult to achieve ideal mixing uniformity, and the mixing element is easy to be blocked, affecting the normal operation of the equipment. SUMMARY

[0003] The embodiment of the application provides a tubular static mixer, which solves the technical problems in the prior art that the tubular static mixer has certain improvement space in mixing efficiency, applicable fluid type range and prevention of blockage, for example, when mixing some fluids with large viscosity difference, it is difficult to achieve ideal mixing uniformity, and the mixing element is easy to be blocked, affecting the normal operation of the equipment.

[0004] The technical scheme adopted by the embodiment of the application is as follows:

[0005] A tubular static mixer comprises a tubular mixer body and a plurality of mixing units arranged along the mixer body in sequence in the axial direction; each group of mixing units comprises a group of helical twisted blades and a flow divider; the pitch and twist angle of the twisted blades are dynamically adjusted according to the viscosity of the fluid; the two ends of the mixing unit are provided with left-handed and right-handed structures respectively, and are connected in a cross shape through clamping grooves to form four flow channels; the two ends of the mixing unit are provided with adjustable connecting heads for adjusting the spacing between the mixing units or replacing the modular mixing units.

[0006] Further technical scheme is that the flow divider is a cross-shaped structure, which uniformly divides the fluid into four flow channels in cooperation with the clamping grooves.

[0007] Further technical scheme is that the material of the modular mixing unit is selected according to the properties of the fluid, including corrosion-resistant material or wear-resistant material.

[0008] Further technical scheme is that the adjustable connecting head realizes continuous adjustment or segmented fixation of the spacing between the mixing units through a thread or a bayonet structure.

[0009] Further technical solutions are as follows: the number of the mixing units is 4-12, and the mixing units are arranged according to fluid mixing requirements.

[0010] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0011] 1. Due to the arrangement of the mixer body, the plurality of mixing units and the adjustable connecting head, the mixing efficiency can be improved through the layered shearing of the helical twisted blade and the cross mixing of the four flow channels, and the device is especially suitable for fluids with large viscosity difference (such as oil-water mixture). For different fluid viscosities, the flow state can be optimized by adjusting the pitch and the twist angle (for example, for high-viscosity fluids, a small pitch and a large angle are designed to increase the shearing rate), and local dead zones are avoided. The adjustable connecting device allows the spacing between the mixing units to be increased to 2-3 times the conventional value, which reduces the resistance of the fluid containing solid particles (such as sludge), and the blockage rate is greatly reduced. The corrosion-resistant module (such as Hastelloy material) can be replaced separately, which greatly shortens the maintenance time and is suitable for strong acid and strong alkali media in the chemical industry. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective view of the overall structure of the tubular static mixer in the embodiments of the present application.

[0013] Figure 2 It is a front view of the overall structure of the tubular static mixer in the embodiments of the present application.

[0014] In the figure: 1, mixer body; 2, mixing unit; 3, adjustable connecting head. DETAILED DESCRIPTION

[0015] The embodiments of the present application provide a tubular static mixer, which solves the problems in the prior art that the tubular static mixer still has certain improvement space in mixing efficiency, applicable fluid type range and prevention of blockage, etc. For example, for some fluids with large viscosity difference, it is difficult to achieve ideal mixing uniformity, and at the same time, the mixing element is prone to blockage, which affects the normal operation of the equipment.

[0016] The technical solutions in the embodiments of the present application are to solve the above problems, and the general idea is as follows:

[0017] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings of the specification and the specific embodiments.

[0018] A tubular static mixer, such as Figure 1 and Figure 2As shown, it comprises a tubular mixer body 1 and a plurality of mixing units 2 arranged along the mixer body 1 in sequence. Each group of mixing units 2 comprises a set of helical twisted blades and a splitter plate. The pitch and twist angle of the twisted blades are dynamically adjusted according to the fluid viscosity. The pitch range for low viscosity fluid is 1.5D-3D (D is the pipe diameter), and the twist angle is 45°-60°. The pitch range for high viscosity fluid is 0.5D-1.5D, and the twist angle is 60°-90°.

[0019] The left-handed and right-handed structures are arranged at both ends of the mixing unit 2, and are connected in a cross shape through the clamping groove to form four flow channels. The adjustable connector 3 is provided at both ends of the mixing unit 2 for adjusting the spacing between the mixing units 2 or replacing the modular mixing unit 2.

[0020] The splitter plate is in a cross shape and cooperates with the clamping groove to uniformly divide the fluid into four flow channels.

[0021] The material of the modular mixing unit 2 is selected according to the properties of the fluid, including corrosion-resistant materials or wear-resistant materials.

[0022] The adjustable connector 3 realizes continuous adjustment or segmented fixation of the spacing between the mixing units 2 through thread or pin structure.

[0023] The number of mixing units 2 is 4-12, which is configured according to the fluid mixing requirements.

[0024] Example 1: Mixing of high viscosity fluid

[0025] Application scenario: mixing of epoxy resin and curing agent in chemical reactor (viscosity ratio 1:10).

[0026] Configuration parameters:

[0027] Number of mixing units: 8;

[0028] Pitch of twisted blades: 1.2D (D=50mm), twist angle 75°;

[0029] Spacing between mixing units: 15mm (fixed at the minimum spacing position by pin);

[0030] Material: silicon carbide wear-resistant module.

[0031] Effect: uniformity of mixing reaches 98%, pressure drop is only 0.15MPa, and there is no local solidification phenomenon.

[0032] Example 2: Treatment of solid-containing fluid

[0033] Application scenario: mixing of medicament containing 5% suspended particles in sewage treatment plant.

[0034] Configuration parameters:

[0035] Number of mixing units: 6;

[0036] Mixing unit spacing: 30mm (adjustable to anti-clogging gear);

[0037] Splitter plate opening rate: 60% (optimize particle passability).

[0038] Effect: No clogging for 200 hours of continuous operation, mixing CV value ≤5%.

[0039] Example 3: Mixing of corrosive fluids

[0040] Application scenario: mixing of hydrochloric acid (20%) and corrosion inhibitor.

[0041] Configuration parameters:

[0042] Mixing unit material: polytetrafluoroethylene (PTFE) corrosion-resistant module;

[0043] Twisted blade angle: 50° (low shear requirement);

[0044] Flow channel surface roughness: Ra ≤ 0.8 μm (reduce corrosion deposition).

[0045] Effect: Equipment life extended to more than 3 years, mixing uniformity error <3%.

[0046] Due to the adoption of the mixer body 1, the plurality of mixing units 2, and the adjustable connecting head 3, through the layered shear of the helical twisted blade and the cross mixing of the four-flow channels, the mixing efficiency can be improved, especially suitable for fluids with large viscosity difference (such as oil-water mixture). For different fluid viscosities, the flow state is optimized by adjusting the pitch and twist angle (such as small pitch and large angle design for high viscosity fluids, shear rate is increased), to avoid local dead zones. The adjustable connecting device 3 allows the mixing unit spacing to be increased to 2-3 times the conventional value, reducing the resistance of solid particle-containing fluids (such as sludge), and the clogging rate is greatly reduced. Corrosion-resistant modules (such as Hastelloy material) can be replaced individually, greatly shortening the maintenance time, and suitable for strong acid and strong alkali media in the chemical industry.

[0047] Although the preferred embodiments of the present application have been described, those skilled in the art, once they know the basic creative concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0048] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A tubular static mixer, characterized in that, It includes a tubular mixer body (1) and multiple mixing units (2) arranged sequentially along the axial direction of the mixer body (1); each mixing unit (2) includes a set of spiral twisted blades and a flow divider; the pitch and twist angle of the twisted blades are dynamically adjusted according to the fluid viscosity; the two ends of the mixing unit (2) are respectively provided with left-hand and right-hand structures, and are connected in a cross shape by a slot to form four flow channels; the two ends of the mixing unit (2) are provided with adjustable connectors (3) for adjusting the spacing of the mixing units (2) or replacing the modular mixing units (2).

2. A tubular static mixer as described in claim 1, characterized in that, The flow divider has a cross-shaped structure and, in conjunction with the slot, evenly divides the fluid into four flow channels.

3. A tubular static mixer as described in claim 1, characterized in that, The material of the modular hybrid unit (2) is selected according to the fluid properties, including corrosion-resistant materials or wear-resistant materials.

4. A tubular static mixer as described in claim 1, characterized in that, The adjustable connector (3) enables continuous adjustment or segmented fixing of the spacing of the mixing unit (2) through a threaded or pin structure.

5. A tubular static mixer as described in claim 1, characterized in that, The number of mixing units (2) is 4-12, configured according to the fluid mixing requirements.

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