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At room temperature, an element is formed into a powder-like solid, which is easy to melt. the element burns in oxygen and emits a blue-purple flame. 5 This element is sulfur,Sulfur burns blue and purple in oxygen,At normal temperature, it is a summary of powder junior high school chemistry. 1. chemistry is an experiment-based natural science that studies the composition, structure, nature and change law of substances.What physics and chemistry have in common: natural science based on experiments.2. the fundamental difference between chemical change and physical change is whether there are any new substances.Some phenomena such as heat release, light emission, discoloration, gas release and precipitation occur in chemical changes.3. physical properties--State, odor, melting point, boiling point, hardness, density, extensibility, solubility, volatility, conductivity, adsorption, etc.4. chemical properties--Oxidation, reduction, metal activity, activity, stability, corrosiveness, toxicity, etc.5. after heating
Can the activated carbon filter in the water treatment device reverse wash the raw water? The activated carbon filter of the water treatment device is to filter the particulate impurities in the raw water,After getting a small filter of suspended solids,The setting of the anti-washing program is because the impurity content of the filtered raw water is much higher,To restore the filtering function,Use clean water sources in the opposite direction to wash back,Therefore, the raw water for reverse washing water is not impossible,But did not clean the water after filtration.No,It is better to produce water.
In raw water or wastewater treatment, AFF asymmetric fiber filter is used as an efficient and fast filtration equipment. What are the features of backwashing and what are the principles? The DECEAD asymmetric Fiber Fast filter adopts the asymmetric fiber bundle material as the filter material,Both the advantages of particle filter material and fiber filter material.When backwashing,Due to the poor proportion of core and fiber,The tail fibers spread and swing with the backwashing flow,Have a strong traction,The collision between the filter materials also aggravated the mechanical force of the fiber in the water,Make it easy for solid particles attached to the surface of the fiber to fall off,Thus improving the washing degree of the filter material,At the same time, the filter material has the backwashing function of the particle filter material.
