Duo-curved mixer

Product Introduction:

In municipal, chemical, papermaking, and various other water treatment processes, water body mixing and blending is one of the key process steps. Traditional mixing equipment is divided into two common types: vertical-axle propeller and horizontal (submersible) types. Due to the installation method and blade shape determining the mixing pattern, they are not ideal in terms of energy consumption and mixing efficiency. This not only unnecessarily increases the operation costs of wastewater treatment plants but also directly affects the desired process treatment outcomes. To address these issues, after years of testing and leveraging the design experience of peers, a new type of double-curved mixer has been successfully developed. After many years of practical application in multiple wastewater treatment plants, it has achieved favorable results.

Model Representation Method:

Application Scope:

The G/Q/FSJ series curved blade mixers are one of our recommended mixers. They are widely used in industries such as environmental protection, chemicals, energy, and light industry, where liquid mixing of solid-liquid and gas is required. Particularly suitable for sedimentation tanks, equalization tanks, anaerobic tanks, nitrification and denitrification tanks in wastewater treatment processes.

Working Principle:

The G/Q/FSJ series curved impeller mixers feature a hyperbolic spiral surface on the upper surface of the curved impeller body, which is formed by the rotation of the hyperbola around the axis of the impeller body. The impeller structure design combines fluid characteristics with mechanical motion to a great extent. The equation of the hyperbola is xy=b, and the curved surface is formed by rotating the curve along the y-axis. To accommodate water flow, the design allows water to enter from the center of the impeller, reducing turbulent entry on one hand and ensuring uniform pressure on the impeller surface on the other, thus maintaining the overall balance of the machine during operation. There are eight guide vanes evenly distributed on the involute double arc surface. The potential energy obtained from the additional water supply by the liquid's own weight pressure is converted into kinetic energy with the centrifugal force generated by the impeller rotation. Under the action of gravity acceleration, the liquid moves tangentially along the circular direction of the impeller circumference through the double curved structure. Due to the reflection action of the pool wall, a cyclic water flow is formed from top to bottom, thus achieving cross water flow in both the axial (y) and radial (x) directions (as shown in the hyperbolic flow state diagram).

Due to the structural characteristics of the impeller and the feature of near-bottom installation of the G/Q/FSJ series curved blade mixers, their working position ensures a direct anti-settling effect on suspended particles. This allows for ideal mixing results during operation and effectively eliminates dead mixing zones. The larger specific surface area achieves a wide exchange of water bodies.

Biconvex flowchart

The impeller structure consists of a guide fluid body, stirring blades, and a drive shaft.

Structure Overview:

The G/Q/FSJ series curved impeller mixers consist of a driving unit, a double curved impeller body, and installation accessories. To cater to various operating conditions, the installation is available in two types: dry (also known as vertical shaft) and submersible. Dry installation involves fixing the driving unit to a work bridge, transferring kinetic energy to the impeller components in the medium through a drive shaft. It is suitable for liquids with high solid content, high water temperatures, and abrasive properties. The impeller's self-aligning feature ensures smooth operation with less than 60 dB of noise from the reducer. Submersible installation eliminates the need for bridge structures, utilizes submersible power, and is positioned by the equipment's own weight, offering flexible and convenient installation. It is suitable for deep water bodies with stable water quality, free of abrasive properties, and with water temperatures not exceeding 40°C and pH levels between 6~9. Notably, it is noise-free and has no visual obstructions.

Submersible Installation Diagram

Dry Installation Diagram

Job Characteristics:

The G/Q/FSJ series curved blade mixers are mixing equipment suitable for blending various low-viscosity liquids, as well as for mixing solid-liquid and gas-liquid mixtures. They are not only applicable to circular and square tanks but are also commonly used in rectangular tanks when arranged in units.

In our country's existing wastewater treatment processes, the paddle mixer primarily overcomes the issues of dead spots and poor water-aeration mixing effects commonly found in traditional blade (propeller) mixers, leveraging its even mixing advantage. Key features are as follows:

(1) Suitable for applications involving mixtures of liquids, solids, and gases, it can replace existing mixing equipment. It achieves a three-dimensional spiral mixing effect, ensuring more uniform mixing and enhancing mixing efficiency.

(2) Larger specific surface area impellers, with lower power requirements, result in greater circulation water flow and lower energy consumption, achieving up to 30%-50% energy savings compared to traditional mixing methods.

(3) The complete machine features a compact structure, reliable operation, and easy installation and maintenance.

(4) The impeller is made of reinforced fiber or steel material, capable of accommodating various operating conditions and boasting a long service life.

Performance Parameters:

Selection and Application:

The selection of G/Q/FSJ series curved blade mixers is the same; the two differ only in installation methods. Like the selection for other types of mixers, the choice of curved blade mixers depends on parameters such as the pool type, volume, liquid depth, medium concentration, temperature, and pH level.

The selection of curved agitators primarily depends on the effective service area of each unit, and in accordance with the principle that the ratio of pool length to width does not exceed twice, rectangular pools can be divided into several equal work units, thereby determining the number of agitators needed.

For depths over 5 meters or concentrations exceeding the specifications, consider increasing the power or the working speed of the agitator during selection to ensure effective mixing in large-volume and high-concentration media.

Under normal operating conditions, it is recommended to prioritize dry installation. For noise or visual requirements, submersible installation is suggested. Our company can assist customers in selecting the appropriate type for their environment.

RPM and flow rate curve:

Installation:

The installation of the double-cone mixer is divided into dry installation and wet installation, both of which are very simple.

The wet-mounted mixer can be directly lifted into the designated position using a crane or lifting frame, relying on its own weight for positioning, and securing the cables. See the wet-mounted installation illustration.

The dry-installation mixer first secures the reducer frame onto the work bridge, then simply install the drive shaft, impeller components, and securely fasten the cables, as shown in the dry-installation diagram.

Cautionary Notes:

1. Prior to installation, a qualified electrician must inspect the motor and electrical equipment, confirm the direction of rotation, and ensure the working distance of the impeller from the bottom of the pool is ≤300mm. The pool bottom should be flat, sturdy, and free of construction debris.

2 If the equipment is not operated for a prolonged period, prevent sediment buildup during restart to avoid impeller blockage and motor damage.

Consider the impeller's inlet and outlet dimensions in a sealed tank.

Regardless of the installation method, the underwater cable should be securely fastened to prevent wear.

Read the product installation and usage manual carefully before use.