Water treatment equipment filtration selection
Water treatment equipment filtration selection First, mechanical filter selection and precautions Second, the filter notes Before using the filter, check that the fittings and seals are complete, damaged, and then install them as required. The new filter must be cleaned with detergent (please do not use acid cleaning). After cleaning, use high-temperature steam to sterilize, disinfect and wash the filter to avoid contamination. Head Protective Cap,Simplex Work Cap,Protective Cap,Anti Smashing Safety Helmet Dongying Hong Xing Labor Protection Products Co.,Ltd. , https://www.hongxinglabor.com
Industrial production process of the material to be filtered is very large, and the status of different filter materials are not the same, so the choice of an ideal filter device is quite complicated, a lot of factors to consider, will now be considered by the choice of filtration equipment The main elements are introduced as follows:
1. Filtration characteristics of suspension (material)
Before selecting a filter unit, you should first have a clear understanding of the condition of the material that needs to be filtered during production. The concentration of the suspension, the particle size distribution of the solid particles, and the like should be determined, and the type of the filtering device to be selected is initially determined based on the measurement.
2, water treatment
In the production process, the amount of material to be filtered is large, and it is advantageous to use a continuous or automated operation filter. If the amount of material to be processed is small, it is generally economical to use a batch filter.
3. Water treatment conditions
Filtration of high temperature, volatile or toxic materials requires special consideration. If the temperature of the suspension is high, vacuum filtration is difficult due to the vapor pressure relationship, and it is suitable to use pressure filtration. In the case of strong material toxicity, closed filtration must be used to prevent material leakage from polluting the environment.
4, the effect of water filtration arrival
After filtration, some recover valuable solids, some are purified filtrates, and some are both.
5, filter structure and material
If the filter solution is not corrosive, the material requirements should not be too high when using the filter, otherwise the cost will be higher. Structurally, simple models should be considered to avoid maintenance difficulties.
The filter media directly affects the filtration capacity and filtration accuracy of the filtration equipment. If it is not properly selected, even advanced filters can not play a good role. In the field of liquid-solid phase separation, filter media such as filter cloths and filter screens are widely used. With the development of the industry, a variety of filter media have come out one after another. The media characteristics are mainly reflected in the retention capacity, permeability (or gas permeability), temperature resistance, chemical resistance, mechanical strength and ease of peeling off the filter cake. In addition to considering the above factors, it is also necessary to pay attention to the low price and sufficient source.
When the filter is installed, the inlet and outlet should not be reversed. The port on the side of the pipe filter is the liquid inlet, and the pipe connected to the filter socket is the clean liquid outlet. The new filter element is a non-perforated plastic package that is packaged in a plastic bag by a manufacturer in a clean production plant. The filter element with higher requirements is used, and it must be sterilized by high-temperature steam after installation.
When the filter element is inserted into the port, the filter element must be vertical. After inserting the port, the platen is fastened to the tip fin, and the tightening screw does not move. After the inlet of the filter element of the 226 interface, it should be rotated by 90 degrees. This is the key to the installation. If there is a little carelessness, it will not reach the seal and it will leak easily, which will not meet the requirements.
The pressure gauge of the cylinder is a liquid pressure display. If it is a secondary filtration, it is normal for the filter to have a slightly smaller index. The longer the usage time, the higher the pressure and the lower the flow rate, which means that most of the filter gap has been Block, flush or replace with a new filter.
When filtering, the pressure used is generally about 0.1 MPa, which can meet the production needs. As time and flow rate increase, the filter core pores are clogged and the pressure increases, generally not exceeding 0.4 MPa, and the Zui height must never exceed 0.6 MPa. Doing so can damage the filter element or be broken down, especially when using precision filters .