Installation and commissioning requirements for frame mixer, installation diagram for frame mixer, JBK frame mixer with base

The selection of a frame mixer based on the physical properties, capacity, and mixing purpose of different media can play a significant role in promoting chemical reaction rates and improving production efficiency. The frame mixer is generally used for mixing Congee like materials.
It can be regarded as a deformation of the paddle mixer, with a relatively sturdy structure and a large amount of animal material to be stirred. If the shape of the bottom of such a mixer is similar to the shape of the lower head of the reaction vessel, it is usually called an anchor mixer. The diameter is relatively large, usually taken as 2/3~9/10 of the inner diameter of the reactor, with a speed of 50~70r/min. When used for low viscosity liquids, the ratio of the blade diameter to the tank diameter of the anchor impeller is 0.7-0.9, and for high viscosity liquids it is 0.8-0.95. The speed is usually 10-50 r/min. The small gap with the reactor wall is conducive to the heat transfer process. When rotating rapidly, the liquid driven by the agitator blades brings the stationary layer down from the reactor wall; When rotating slowly, a mixer with a scraper can generate good heat conduction. This type of mixer is commonly used for heat transfer, crystallization operations, and mixing of high viscosity liquids, high concentration slurries, and settling slurries.
Anchor type, belonging to the same category, collectively referred to as anchor, in order to increase the mixing range and carry away residues or liquid layers on the tank wall, the outer contour of the anchor should be close to the inner wall of the mixing tank, and its bottom shape can also be elliptical, conical, etc. to adapt to the contour of the tank bottom. In order to increase the mixing range for high viscosity materials and improve the rigidity of the impeller, it is often necessary to add some vertical blades and crossbeams on the anchor and frame structures, which results in a variety of structural shapes for the anchor frame structure.
Applicable viscosity
The applicable high viscosity is 200-300 Pa · s.

structure
The connection method between the anchor and the mixing shaft is similar to that of a paddle type, where one end of the impeller is connected to the mixing shaft to form a semi-circular collar, and then the two semi-circular rings on both sides of the blades are clamped on the mixing shaft with bolts, while the blades are fixed to the mixing shaft with through shaft bolts. Due to the large external dimensions of the impeller, for ease of assembly and disassembly, most of the blades are connected by bolts, and only small ones are cast or welded. The impeller is mostly made of flat steel and angle steel. In order to improve the strength of the impeller, reinforced steel plates can also be used.

flow state

Horizontal circumferential flow at different heights

Frame mixerInstallation and debugging requirements:

Before lifting and installing, check if the foundation dimensions match the installation dimensions of the equipment;

Check if the installation height of the top and bottom of the pool (tank) is correct and within the allowable tolerance± 20mm, when the requirements cannot be met, steel plates can be placed under the rack or bottom support for correction;

After aligning the equipment, spot weld the bottom plate under the rack and bottom support onto the embedded parts, and manually push the equipment to rotate evenly without any jamming. Weld the pad firmly to the embedded iron;

The reducer is lubricated with oil, and the frame bearings are lubricated with grease. The requirements for adding or supplementing oil are detailed in the reducer user manual;

Add lead based grease to the base shaft sleeve and seal it with asbestos packing;

After the power is connected and the no-load operation is normal, put it back into load operationThe rotation direction is clockwise when viewed from above;

Operating Procedure for Electric Control Box

1. Inspection: Before power transmission, check the insulation resistance, grounding protection, and reliability of all electrical contacts in the control cabinet. After power transmission, check if the three-phase voltage is normal.

2. Operating procedure: Power on: Close the power switch QF, and the power indicator red light HR will turn on.

a. Manual mode: Set the selection switch SA to the "manual" (left 45 °) position.

△ Power on: Press the start button ST, and the green light HG indicating the operation of the mixer will light up.

△ Shutdown: Press the stop button SP according to the process requirements, and the green running indicator light HG will turn off.

b. Automatic mode: Set the selection switch SA to the "automatic" position (rotate 45 ° to the right). According to the process requirements, the PLC workstation sends instructions to control the start and stop of the mixer.

3. Accident alarm:

When accidents such as power phase loss, short circuit, or mixer overload occur, the mixer will shut down and display lights.

Jiangsu Du'an Environmental Protection Frame Blender Quality Inspection System:

Jiangsu Du'an Environmental ProtectionThere is an independent quality inspection agency with quality veto power. During the inspection process, inspectors strengthenThree inspections "are strictly carried out in accordance with the" Product Monitoring and Measurement Control Procedure "," Control Procedure for Monitoring and Measuring Devices ", drawings, and various inspection specifications. In accordance with the" Non conforming Product Control Procedure ", the control of non-conforming products is strengthened to ensure that they do not flow into the next process. Establish quality control points in key processes, such as air pressure testing, dynamic balancing of rotors and impellers, assembly of bearings and seals, etc., to strengthen quality control and ensure stable quality.

Carry out product quality supervision and inspection, on-site management inspection, and process discipline inspection in quality management, and implement a quality accident and loss compensation system. Regularly conduct technical training, quality education, and assessment for operators, inspectors, and other personnel to ensure that workers have sufficient technical skills and operational abilities, and to enhance their quality awareness.