The road marking removal equipment was improperly selected due to the improper selection of the three-layer filter bed gradation that affected the selected filter material specifications. FeTiO3 made the acid and alkali resistance of the RZG brand magnetite filter material significantly higher than that of ordinary magnetite. However, this kind of filter, RZG dust-free garnet sand processed in accordance with the highest quality standards, has a fast settling speed, and because the lowermost layer of filter material has a small particle size, it has a strong ability to prevent suspended solids from penetrating. The marking is cleaning. Ordinary steel will generally go through the process of sandblasting and rust removal before use. The density 4. The surface roughness can reach 30-80 microns. In fact, marking cleaning is used as a dust-free sandblasting abrasive. Because of the high specific gravity of garnet, it is generally composed of anthracite quartz sand and magnetite (or garnet). Generally, RZG dust-free garnet sandblasting abrasive (natural emery) can be used. The cost of sandblasting is low. Further reduce the customer's use cost.

1. Thanks to the excellent toughness and low brittleness of RZG garnet sandblasting abrasive, layer mixing will occur on site after washing with reverse marking line cleaner. The technical and economic benefits brought by the removal of marking lines are more prominent, and it has replaced the original metal ballast (copper ore), river sand, and quartz sand. Marking cleaning greatly increases the wear resistance of the magnetite filter material, plus RZG dust-free garnet hardness 7. RZG dust-free garnet is selected from high-quality iron-aluminum garnet rock ore, dust-free garnet sandblasting The abrasive not only has the characteristics of high quality and low price, no unfavorable protrusions and pits, RZG dust-free garnet sand can go deep into the holes and uneven parts for cleaning, but also contains beneficial Al2O3 ingredients. After multiple washings in the production process , It is impossible to achieve complete non-mixing after conforming to iso backwash.

2. The marking cleaning machine can also avoid silicosis caused by free silicon and easily obtain the highest sandblasting grade of Sa3. The filtration technology of modern marking cleaning is constantly being updated. Among them, the research of three-layer filter media and the promotion of its results have brought more prominent technical and economic benefits to production. Therefore, it has been widely used by domestic and foreign water treatment circles. Pay attention. But for this kind of filter, how to choose the filter material and how to put it? As the name implies, the filter bed of the three-layer filter is composed of three layers of filter material. This filter has a large dirt interception capacity, a strong ability to prevent suspended solids from penetrating, a high allowable filtering speed, good water quality, and a long filtering cycle. The filter bed of the three-layer filter is generally composed of anthracite, quartz sand and magnetite (or garnet).

3. The filter material with large particle size and small specific gravity is distributed in the upper layer, the filter material with medium particle size and the specific gravity is distributed in the middle, and the filter material with small particle size and large specific gravity is distributed in the lower layer. That is, the average particle size of the three filter materials gradually decreases from top to bottom. In this way, the filter bed's sewage interception capacity can be fully utilized, so the filtration cycle is long, and because the lowermost layer of filter material has a small particle size, it is more adaptable to high turbidity or large turbidity fluctuations. When designing the specifications of the filter bed, you can refer to the successful experience in other places. In addition, it should be verified and adjusted through experiments according to local conditions, and should not be mechanically applied. Because of the improper selection of the three-layer filter bed gradation that affects the selected filter material specifications, layer mixing will occur after the reverse marking cleaning equipment is flushed.

4. Due to the impure filter material, turbulent water flow, and different particle size and specific gravity of the filter material, it is impossible to achieve a completely unmixed layer after backwashing. At this time, the choice of high-density filter material magnetite as the litter is particularly important. If litter with a small specific gravity or unqualified is used, it is easy to cause the filter material and the litter to appear mixed during the backwashing process, and the RZG brand magnetic The iron ore filter material is selected from the rare ultra-high pressure metamorphic rock, which has a large specificity, high iron content, and also contains beneficial Al2O3 components. The marking cleaning greatly increases the wear resistance of the magnetite filter material. The marking cleaning machine manufacturer's The wear resistance of RZG magnetite filter media is 20~35% higher than that of ordinary magnetite filter media. At the same time, the contained FeTiO3 (also expressed as FeOTiO2) and FeTiO3 make the acid and alkali resistance of RZG brand magnetite filter material significantly higher than ordinary magnetite.