Duwan Environmental Equipment (Jiangsu) Co., Ltd

Variable Frequency Speed Control Double Concave Blender

Bi-convex mixer with variable frequency control

Nanjing Spherical Agitator Manufacturer

Impeller Material: Fiberglass Reinforced Plastic (FRP)

Shaft Material: 304 Stainless Steel

Gearbox:减速机

Features of Frequency Conversion Variable Speed Double Curved Blade Mixer FRP Propeller: Long service life, not easy to break or crack, excellent mechanical properties.

Low-speed Submersible Thruster Material: Propeller blade made of imported polyurethane material, motor housing cast iron.NSKBearings, products can be customized according to customer requirements.!The low-speed propeller is developed and manufactured by our company based on the absorption of cutting-edge technology, featuring a high technical starting point, significant energy saving, strong safety, and unique functions.

The dual-curved mixer's leakage protection feature is designed to detect any water leakage inside the submersible mixer, when water leakage occurs within the mixer

Leakage will trigger corresponding alarm and control signals.

The dual-curved mixer motor overheating protection feature is specifically designed to detect the temperature of the stator winding inside the submersible mixer equipment, when the stator...

When abnormal temperature occurs, the electric control unit will emit corresponding alarm and control signals, or automatically shut off power to protect the motor stator winding.

Burnt for convenience in timely maintenance and handling of the submerged double曲面 mixer by staff.

Blade assembly

Note:

Before installing the impeller and drive shaft on the double curved mixer, first select the angle adjusting plate according to the working conditions.

Ensure both blades are installed at the same angle.

Steps1Loosen the hubcap1Top Cover2Screw (of)3）（M16*80Left-hand thread), remove the end cap;

Steps2Insert a blade into the hub's hole from above, positioning the blade wheel shaft slot outward, and adjust the selected angle of the blade.4Insert into the slot of the impeller shaft, connect to the hub with two bolts, and use a hex wrench to first tighten the bolt on the left side.5), then tighten the screw on the right (6）。

To facilitate installation of two blades, rotate the hub180oInstall two blades using the aforementioned method.

Steps3Cover the top cap, and place the two toothed washersM16*80Left-hand threaded screws are being tightened in.

The dual-curved blender can create a blending device with high-volume flow and achieves a wide-area circulation with a gentle water flow with less power.Duo-curved mixerThe impeller structural design maximizes fluid characteristics and mechanical motion.The double曲面 impeller's surface is formed by the curve xy=b rotating along the y-axis to create a surface solid. Designed for water flow accommodation, it draws water from the center of the impeller, which reduces water turbulence and ensures uniform pressure on the impeller surface, thus maintaining overall balance during motion. There are eight guide vanes evenly distributed on the involute double arcs, utilizing the potential energy gained from the additional water obtained by the self-weight pressure to supplement the water and the centripetal force generated by the impeller's rotation to form kinetic energy. Under the influence of gravity acceleration, the liquid moves tangentially along the circular direction of the impeller, creating a circular water flow from bottom to top due to the reflection action at the equator, thereby achieving cross-flow in both the axial (y) and radial (x) directions. It is due to the structural characteristics of the double曲面 mixer impeller and its close-to-bottom installation feature that it achieves an ideal mixing effect during operation, effectively eliminating dead mixing zones.

The entire dual-curved mixer consists of a drive unit, a dual-curved impeller body, and installation accessories. To meet the usage requirements under different working conditions, the installation is divided into dry-type(Also known as vertical-axis) and submersible types. Dry installation, where the drive unit is mounted on the working bridge and the kinetic energy is transferred to the impeller components in the medium through a transmission shaft. It is used in liquids with high solids content, high water temperatures, and abrasive characteristics. Due to the impeller's automatic alignment function, the operation is relatively smooth, with the reducer noise less than 60 decibels. Submersible installation can eliminate the need for bridge structures, using submersible power and positioning by the equipment's own weight. It is versatile and convenient for installation in deep water bodies with stable water quality, free of abrasive properties, with water temperatures not exceeding 40°C, and pH levels between 6 and 9. Its features include noiselessness and no visual obstructions.

The upper surface of the bi-conical impeller is a bi-conical structure formed by the rotation of the bi-conic generatrix around the axis of the impeller body. Its unique impeller structure design maximizes the combination of fluid characteristics and mechanical motion. The equation of the hyperbola is xy=b, and the curved surface body is formed by rotating the curve along the y-axis; to accommodate water flow, the design draws water in from the center of the impeller, which on one hand reduces the turbulence of the incoming water and on the other hand ensures uniform pressure of the liquid on the impeller surface, thereby guaranteeing the overall balance of the machine in motion. There are eight guide vanes evenly distributed on the involute bi-arc surface, utilizing the potential energy obtained from the additional water intake due to the liquid's own weight pressure, and the kinetic energy formed by the centrifugal force generated during the rotation of the impeller. Under the action of gravity acceleration, the liquid transitions through the bi-conical structure and moves tangentially along the circular path of the impeller, forming a circular water flow from top to bottom due to the reflection from the pool wall, thus achieving cross水流 in both the axial (y) and radial (x) directions. It is due to the structural characteristics of the vertical wave impeller and its installation close to the bottom of the pool that its working position determines its direct anti-settling effect on suspended particles, achieving ideal mixing effects during operation and effectively eliminating dead mixing spots. A large specific surface area allows for a large-scale water exchange.

The selection of a dual-surface agitator is related to parameters such as the shape and volume of the tank, liquid concentration, medium density, temperature, and pH. The main basis is to determine the effective service area of each unit, and according to the principle that the length-to-width ratio of the tank does not exceed twice, the rectangular tank can be divided into several equal working units, thereby determining the number of agitators.

Curved Surface Blender Working Features: As a high-PerformanceBlending equipment suitable for mixing various low-viscosity liquids, solid-liquid, and gas-liquid mixtures; not only applicable to circular or square pools, but also commonly used in unit arrangement in rectangular pools.

Among the various wastewater treatment processes in our country, the paddle mixer primarily overcomes the issue of dead spots commonly found in traditional blade mixers and the poor aeration and water vapor mixing in the aeration process, leveraging its advantage of even mixing.

Dual-curved mixer working characteristics:

Soft flow, three-dimensional circulation, no dead spots due to stirring.

2. Adjust the flow rib height to accommodate varying water depths.

3. Elastic fixed connection, stable and reliable operation

4. Compact overall structure, reliable operation, easy installation and maintenance, with minimal investment costs.

5. The impeller is made of fiberglass, capable of accommodating various operating conditions and boasting a long service life.

6. Suitable for use in various liquid and solid, gas mixing applications, it can replace existing mixing equipment, achieving three-dimensional spiral mixing for more even blending. Alternating left and right spiral orientations enhance mixing efficiency.

7. The dual-curved mixer features a larger specific surface area impeller, with a smaller power configuration, larger circulating water flow, and low energy consumption, saving up to 30%~50% of energy compared to traditional mixing methods.

Jiangsu Du'an Environmental ProtectionDual-curved mixer

Dual-curved blender equipment list and technical specification table

Jiangsu Du'an Environmental Protection's dual-curvedThe mixer is a complete set and requires accessories such as an electric control box, rain shield, foundation bolts, and mounting brackets for effective and safe operation.

Duo-curved mixerTechnical Specifications

Twin-surface blender requires low disturbance with highPerformanceThe solution homogenization capability is ensured, with no sediment stratification in the sludge removal integrated pond. The impeller speed and diameter are determined by the contractor based on the pond type and dimensions of the sludge removal integrated pond.

The dual-curved mixer operates reliably with low noise, and its impeller and submersible parts are highly durable.Corrosion from agents like PAM and PAC.

Double curved mixer dailyContinuous 24-hour operation, intermittent operation (can be started at least 12 times per hour), and recovery from long-term shutdown to operation, maintaining vibration-free and smooth running throughout the process.

Design Requirements for Main Technical Performance of Blender:

Sludge Comprehensive Pool Mixing Medium: Sludge Water

Mixer Types: Vertical installation, tangential recirculation flow or axial flow recirculation.

Sludge comprehensive pool liquid intake material: agitator shaft and paddle bladesSS304 stainless steel

Branding:减速机SEW、Changzhou Guomao or Jiangsu HuibangOutdoor installation;

Propeller blade diameter: Based on homogeneity requirements,As per on-site usage requirements or customer's selection；

Propeller blade speed:20~40rpm

Duo-curved mixer accessoriesElectricalControl CabinetRequirements：

On-site electrical control boxDual-curvedComplete set of mixers supplied, from the electrical control box toDuo-curvedThe power, control cables, and cable fasteners for the mixer are supplied by the installation unit. The technical requirements for the control cabinet and control are specified in the electrical and control terms.

Kitting local control box requirements:

Each unitDuo-curvedMixers require on-site single-step control activation.The stop function and PLC remote control capability require that the electrical control cabinet be equipped with at least the following signal interfaces:

Input Signal (Passive Contact): Open/Stop Control Signal

Output Signal (Passive Contact): Manual/Automatic signaling;

                     Operating Signal

                     Comprehensive fault signal.

Passive contact signal logic: All signals are positive logic signals.

Signal Contact Capacity:220V，5A。

This section governs the pre-settling pond, sedimentation pond, concentration pond, and dosing room.PAC Feed Pool StirringMachineModel and specifications, technical requirements, etc.

Table13.3-1 Blender Equipment List and Technical Specifications Sheet