Frame-type Concrete Mixer

Duwan Environmental ProtectionThe JBK Flocculation Blender selects the appropriate blender based on the physical properties, capacity, and mixing purpose of different media, which can greatly enhance the rate of chemical reactions and improve production efficiency. Frame blenders are generally used for mixing paste-like materials.

The frame mixer can be considered a variation of the paddle mixer, featuring a more robust structure and the ability to handle larger volumes of material. When the bottom shape of such mixers resembles the bottom shape of a reaction kettle, they are typically referred to as anchor mixers. Frame mixers have a larger diameter, generally about 2/3 to 9/10 of the reactor's internal diameter, operating at 50 to 70 rpm. For low-viscosity liquids, the ratio of the impeller diameter to the tank diameter for anchor blades is 0.7 to 0.9, while for high-viscosity liquids, it is 0.8 to 0.95, with a typical speed range of 10 to 50 rpm. The frame mixer has a smaller gap with the kettle wall, which is beneficial for the heat transfer process. At high speeds, the liquid propelled by the mixer blades removes the stationary layer from the kettle wall; at low speeds, mixers equipped with scrapers can achieve good heat conduction. These mixers are commonly used for heat transfer, crystallization operations, and mixing of high-viscosity liquids, high-concentration sludges, and sedimenting sludges.

Anchor and frame mixers belong to the same category, collectively known as anchor-frame mixers. To increase the mixing range and remove residues or liquid layers from the tank walls, the outer contour of the anchor-frame mixer needs to be close to the inner wall of the mixing tank. The bottom shape, which adapts to the tank's bottom contour, can be elliptical, conical, and so on. To enhance the mixing range for high-viscosity materials and improve the rigidity of the impeller, additional vertical blades and crossbeams are often added to both anchor and frame mixers. This results in a variety of structural shapes for the anchor-frame mixers.

The paddle classification, based on its shape, can be roughly divided into:

Anchor, Ellipse, Conical Base, Square, and Anchor Box styles.

Section 3: Applicable Viscosity

Applicable StandardViscosity200～300Pa·s。

Section IV: Application Fields

Anchor mixer blades typically operate at low speeds, generating minimal shear force during the mixing of low-viscosity liquids, making them unsuitable for liquid-liquid and gas-liquid dispersion. On the other hand, these blades have a high flow rate within the tank, with horizontal rotational flow dominating, resulting in poor mixing uniformity. However, the flow velocity near the tank wall, compared to other blades, achieves a higher heat transfer film coefficient, thus commonly used in heat transfer and crystallization operations. Additionally, due to their larger diameter and close proximity to the tank bottom, they are often used to mix high-concentration sludges and sedimentary sludges. They are also commonly employed for stirring high-viscosity fluids.

V. In Flux

Horizontal circular flow at different altitudes.

VI. Structure

The anchoring method of the anchor mixer and the agitator shaft is similar to that of a paddle mixer, where one end of the impeller is formed into a semi-circular shaft ring. The two semi-circular rings of the side blades are then clamped onto the agitator shaft with bolts, and the blades are secured to the agitator shaft using through-shaft bolts. Due to the large outline size of the impeller, most of them are connected by bolts for easy assembly and disassembly, with only small sizes using casting or welding. The impeller is mostly made of flat steel or angle steel, and reinforced steel plates can also be used to enhance its strength.

Flocculation BlenderBasic Requirements for the Matching Control Box

A.2.1 On-SiteThe electrical components within the control box must meet the rated breaking capacity requirement of ≥50kA. All electrical control systems within the box should operate safely with reliable actions, and switches, buttons, and indicator meters must meet remote/local control requirements.

A. 2.2 Component Requirements:

国产 Shell-type Circuit Breaker: 50kA Breaking Capacity

Miniature Circuit Breakers: Made in China

Contactor: Domestic-made;

Thermal Relay: ;

Start/Stop Button and Indicator Light: Made in China

Terminal blocks: Domestic.

All electrical components must be installed, adjusted, and accepted in accordance with the requirements.

All on-site control boxes/cabinets are made of 304 stainless steel, with a thickness of no less than 2mm, and equipped with stainless steel door handles on the doors.

A. 2.4 The door locks should be uniformly selected as corrosion-resistant and sturdy alloy locks. The outer lock should be a keyed lock, while the inner lock should be a convenient lock. The keys for locks of the same type should be identical. The control box panel must also have a sealed cover with an observation hole covering the indicator lights and buttons, etc., which can be locked to prevent moisture from rain from affecting the components. Silicon rubber sealing rings should be used.

A. Protection level of the 2.5 control box: Indoor not less than IP54, outdoor not less than IP56.

A. 2.6 Color Identification for Electrical Equipment

The color standard for electrical equipment enclosures is silver. Materials include powder coating or 304 stainless steel.

AmongstButton and indicator light usage should comply with the relevant provisions of IEC 60073.

A. 2.6.1 Indicator Light

Each circuit breaker panel should be equipped with a red light and a green light to indicate the closed and open states of the circuit breaker, respectively, with a yellow light indicating "auto-trip." A three-color light can be used when simulating the wire.

When using a lit button for control, the button should be etched with clear instructions such as "push to open" or "push to close." After the command is executed and the device moves, the light should emit the following colors.