As the name suggests, the demister is a device specially used to get rid of water mist. An enterprise that produces and sells mist eliminators in my country. The demister has high specifications and high cost performance. As an industrial waste gas treatment equipment for flue gas desulfurization, the demister is currently the main standard for measuring the performance parameters of the demister is the content and diameter of the droplets in the flue gas after the demister. The factors that affect the performance of the mist eliminator also include many: flue gas flow rate, uniformity of air flow distribution, blade structure, distance between blades, layout style of the mist eliminator, etc.
Generally, the performance requirement of the mist eliminator is to make the content of the mist droplets passing through the mist eliminator less than 75mg/Nm3 in one cycle, and the direct distance without mist is greater than 15μm, which is regarded as standard dry flue gas. Close to the demister within 1-2 meters.
The defogging speed of the defogger is constantly increasing along with the continuous increase of the airflow. This is mainly because the speed of the airflow has become higher, so the force on the water droplets has also become very strong. As a result, the separation speed of the gas and liquid It will also speed up. On the other hand, once the speed of the airflow increases, it will also lead to an increase in resistance, which will consume a lot of energy meters.
The reason why the mist eliminator is very special is that it is made of materials, such as metal wire, engineering plastics, etc. The weaving of this wire mesh also uses a very special method, and then uses some molds to The woven wire mesh is pressed into some wave shapes, and then these wire meshes are used to create a variety of different types of sizes. There are many manufacturers of this kind of machine in many parts of the world that will produce many different products for various industries. The characteristics of this kind of screen mainly include reducing the range of air pressure reduction, the actual surface area is much larger than the apparent surface area, and the removal of mist is very good.
The typical materials used as demisters are high-performance polypropylene (PPH), polysulfone, FRP, and various grades of stainless steel, with PPH materials accounting for the majority.
As a kind of PP material, PPH has improved its performance greatly after modification. The comparison is as follows:
Ordinary polypropylene (PP): low temperature impact strength; no; short life, easy to age, flammable.
High performance polypropylene (PPH):
Long service life-PPH material has a longer service life and systemicity.
Chemical resistance-among all polypropylene materials, PPH material has strong chemical resistance.
Impact strength-Compared with traditional engineering plastics, PPH material has significant low temperature impact strength.
Temperature resistance—According to the actual application, the PPH material has good temperature resistance.
Demisters are mainly used in many fields, bringing great convenience to the majority of technical workers, in the petroleum industry, chemical and chemical industry, light industry, pharmaceutical industry, steel and gold refining industry, aerospace manufacturing industry, environment In the protection industry, high-level technologies such as evaporation and distillation, gas-liquid separation, air and moisture separation, and oil and gas separation in machine facility applications. The selection criteria are also diverse, mainly based on its use, diameter and thickness.
1. Used for gas purification and dust removal in metallurgy, chemical, petroleum and other industries.
2. Used for flue gas purification in environmental protection industry.
1. Good conductivity, defogging (dust).
2. Strong performance, good flame retardancy and long service life.
3. The structure is compact and reasonable, and the equipment is light in weight.