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Wenzhou Xiaojie Machinery Co., Ltd
Process principle of medium-sized pipeline colloid mill
Date: 2025-04-27Read: 7
The process principle of medium-sized pipeline colloid mill is based on high-speed shear, grinding and dispersion effects, combined with the design characteristics of pipeline continuous processing. It can be divided into the following four core parts:
1、 Core structure composition
1. Fixed rotor system
It consists of a high-speed rotating dynamic grinding disc (rotor) and a stationary fixed grinding disc, forming an adjustable grinding gap (usually in the micrometer range) between the two. The dynamic grinding disc is driven by a motor, with a speed of several thousand revolutions per minute, forming a high shear zone with the fixed grinding disc.
2. Pipeline design
Adopting a closed pipeline structure, materials are directly connected to the grinding chamber through flanges to achieve continuous online processing, avoiding material exposure and secondary pollution.
3. Gap adjustment mechanism
Adjust the spacing between the stator and rotor through a handwheel or automated system to control the final particle size of the material (usually within the range of 0.1-5 μ m).
2、 Dynamic mechanism of action
1. Composite force field dominated by shear
The material is subjected to multiple effects within the gap between the stator and rotor:
Shear force: laminar shear generated by the velocity gradient between the moving and stationary disks (with a velocity difference of up to 20-40m/s);
Impact force: high-speed collision between material particles and tooth shaped structures;
Turbulent disturbance: Random collision and fragmentation caused by high-frequency vortices.
2. Multi level processing characteristics
Some models adopt a three-level grinding structure (such as 2G/4M/6F combination), which is refined step by step through coarse, medium, and fine stages. A single treatment can obtain narrow distribution particle size (D90 ≤ 2 μ m).
3、 Continuous process flow
1. Feed stage
The material is pumped into the buffer chamber through a pipeline, and the flow rate is stabilized at 0.5-20m ³/h (typical parameters for medium-sized equipment) through a variable frequency control system.
2. Grinding and emulsification stage
The material undergoes 20000-40000 shear cycles within a retention time of 0.1-0.3 seconds to achieve nanoscale dispersion.
3. Discharge control
The processed material is output through a pipeline with a pressure of 0.7 MPa and can be directly connected to downstream process equipment to achieve fully enclosed continuous production.
4、 Process adaptation characteristics
1. Material compatibility
The contact parts are made of SS316L or HX2010 special stainless steel, which can withstand corrosive media with pH 1-14.
2. Intelligent control
Equipped with variable frequency speed regulation (0-100Hz stepless adjustment), temperature sensors, and pressure feedback system to achieve real-time optimization of process parameters.
3. Cleaning verification
Compliant with CIP/SIP standards, supporting acid-base cleaning and 135 ℃ steam sterilization, meeting pharmaceutical and food grade hygiene requirements.
This process realizes the ultra-fine material through mechanochemical effect, which saves 30-50% energy compared with batch equipment, and improves the treatment efficiency by 3-5 times, especially suitable for the continuous large-scale production of lotion and suspension.
