Ultrafiltration device function in electrophoresis equipment

【Aluminum Road Network】The ultrafiltration (UF) device is an advanced membrane separation technology. The solvents and various small solutes contained in the feed liquid pass through the filter membrane to the low pressure side from the high-pressure feed liquid side to obtain permeate or It is called ultrafiltrate; its ultrafiltration membrane pores can reach 0.01 micron (one hundred thousandth of a millimeter) or less, and can effectively remove particles, colloids, bacteria, heat and organic matter in water, and the size is smaller than the membrane pore size. Large solute molecules are trapped in a concentrated solution.

The basic principle is to use an asymmetrical microporous structure and a semi-permeable membrane medium at a constant pressure and flow rate at room temperature, depending on the pressure difference across the membrane

For driving force, filtration is carried out in the cross-flow mode to allow the passage of solvents and small molecules, and macromolecules and microparticles such as proteins, water-soluble polymers, and bacteria are retained by the membrane to achieve separation, fractionation, purification, and concentration. The purpose of a new membrane separation technology.

Ultrafiltration is a pressure-driven membrane separation process. The ultrafiltration membrane has a separation range of macromolecules and colloidal properties with a relative molecular mass of 500-100 million. The corresponding particle diameter is 0.005-0.1 μm; the separation mechanism is generally considered as a mechanical sieve. The sub-ultrafiltration membrane module has a plate-type, roll-type ultrafiltration membrane for water purification.

Concentration polarization is a natural phenomenon in the membrane separation process. How to reduce this phenomenon to a low level is one of the important topics of ultrafiltration technology. Current measures include: (1) increasing the flow rate of the membrane surface to reduce the thickness of the boundary layer and allowing the entrapped solute to be carried away by water in a timely manner; (2) adopting physical or chemical washing measures;

Typical process flow: raw liquid - storage tank - pressure pump - precision filter - hollow ultrafiltration equipment - liquid tank - backwash tank - backwash pump

Electrophoretic ultrafiltration device has the following features and functions

1. The electrophoretic paint washed off the surface of the workpiece can be recovered to avoid environmental pollution caused by the discharge of waste water with paint.

2. The newly-produced ultrafiltration water provides flush water for the electrophoresis tank workpiece, which can form a closed-circuit circulating water flushing system.

3, through the appropriate discharge of ultrafiltrate, remove the various ions brought into the electrophoretic paint tank during the production process, and stabilize the electrophoretic paint task solution.

4. The reuse of the electrophoretic paint after recycling will enable the company to waste 30% of the electrophoretic paint setup fee and fully save resources.

5, stable electrophoresis bath, improve the quality of the film

The existence of impurity ions has a very bad effect on the electrodeposition properties, stability, and film quality of the paint. However, in continuous production, the paint must inevitably carry impurity ions. Therefore, we must strictly control its content within a certain range. Impurity ions, organic solvents, and small-molecule resins in the electrophoresis bath can be controlled by the discharge of the ultrafiltrate to ensure stable production.