The method to solve the recovery of over-sprayed powder in electrostatic powder spraying


Powder electrostatic spraying will produce a large number of unadsorbed powder. These powders will cause pollution to the surrounding air.

At present, there are two main types of powder recovery: cyclone separation and filtration.

[Recovery of powder coating powder] The solution to the recovery of powder overspray in powder electrostatic spraying

Electrostatic powder coating is a method of using the coating under the action of high voltage electrostatic induction, under the action of electric field force to make the powder coating powder evenly adsorbed on the surface of the coated workpiece, and then through melting leveling and curing film to achieve the purpose of coating. During the coating process, a large amount of unadsorbed powder will be produced, which will cause pollution to the surrounding air. At present, there are two main types of powder recovery: cyclone separation and filtration.

1, the cyclone separation recovery device is to make the powder flow rotating movement, under the action of centrifugal force, to achieve the purpose of powder coating powder and air separation. According to the different structure of cyclone separation powder recovery device, its powder recovery rate can reach 80 ~ 90% in general. In order to meet the environmental requirements, separation of fine powder particles, to ensure the clean discharge of air, in the cyclone separation recovery device discharge end need to add a secondary filtration device.

2. The filter powder recovery device is to pass the powder air through the filter material with certain micropores to achieve the purpose of gas and solid separation. However, the disadvantage is that the micropores in the filter material are easy to be blocked, resulting in the reduction of the recovery air flow and the reduction of the recovery effect. In order to overcome this shortcoming, a pulse-back blowing filter device was developed, which used pulse-back blowing to periodically clean the particles adsorbed in the micropores of the filter material to keep the air flow smooth and maintain a constant recovery effect. According to the size of the powder particles, the powder recovery rate can generally reach 98% by selecting the appropriate filter element material. In the process of powder electrostatic spraying, most of the pulse blowback filter devices are used, but because of the requirements of powder and color change, it is necessary to clean the spray chamber and recovery system, resulting in a large amount of waste powder spillover during cleaning, resulting in pollution.

The recovery device of over-sprayed powder in powder electrostatic spraying is composed of a first-stage whirlwind separation device, an automatic discharge valve and a second-stage pulse back-blowing filter element filtration recovery device. Level of cyclone separating device connected to spray chamber entrance, the settlement of level of cyclone separating device room and automatic unloading valve connection, primary cyclone separating device outfalls and secondary back pulse filter recovery unit inlet connection, secondary back pulse filter cartridge recycling equipment export through air duct connected to the induced draft fan. The utility model has the advantages of improving the automation degree of powder painting process, improving the effective utilization rate of powder, reducing the powder pollution to the atmosphere during the powder painting process and cleaning the spray room, greatly reducing the labor intensity of powder painting process, and significantly improving the labor productivity of painting.

An entry level wine buying guide

If you are new to wine, you want to pick up a bottle that suits you. Or if you want to bring a bottle of festive wine with you to visit your friends and family at the end of the year, this article is for you. It's all about getting started.​

Is wine red wine?

The term "red wine" seems to be more common in life than wine, and many small whites have equated red wine with wine, but it is not. Red wine is just one branch of wine divided by color. It also has two "brothers": white wine and rose wine. The differences among the three brothers mainly depend on grape varieties and brewing techniques.

Red wines need skin to provide a wonderful red color during fermentation, and naturally can only be made from red grape varieties. In addition to the pigment, the peel also gives red wine its tannins, which are responsible for the astringent feeling in the mouth when drinking.

In the process of making white wine, the liquor hardly touches the skin of the fruit, so white wine can be made from both white and red grapes. White wines have little tannin and are lighter in color, mostly light yellow or lemon green 39bet-đua chó-game giải trí -đá gà-đá gà trực tuyến-đánh bài.

Rose wine is a bit more complicated to make. It is common to let the juice of red grapes touch the skin briefly to obtain a light red color. White wine and red wine are also mixed to make rose wine, but this is relatively rare.

What does dry red "dry" mean?

When you buy wine, the label on the back often says "dry red" or "dry white". The "dry" refers to the amount of residual sugar in the wine.

When making wine, yeast converts the sugars in the grapes into alcohol. In most cases, however, the transformation is not complete, so some sugar remains in the wine, called Residual Sugar. Wines can be classified as dry, semi-dry, semi-sweet and sweet according to the amount of residual sugar in the wine from low to high. Most wines on the market at present are dry.

301eb7471598ec835d3b3afea8380532Have you ever heard of the New World and the Old World?

The "Old and New World" of wine is actually a division of wine producing countries in the world according to factors such as region, winemaking history and winemaking tradition.

Generally speaking, the old world wine-producing countries in Europe and the Middle East, such as France, Spain, Italy and Germany, tend to be more traditional grape growing and winemaking techniques, strict wine laws and classification system, the production of wine also pay more attention to the characteristics of the local terroir.

New World winemaking countries have fewer restrictions on grape varieties and winemaking techniques, and winemakers have more freedom to innovate in making wines, resulting in a greater variety of wine styles and relatively easier to drink.

There is no distinction between the old world and the new, but rather a difference in winemaking traditions and wine styles. As the wine market continues to evolve, the wine producing countries of the old and new world will learn from each other and strive to produce great wines.

What does the year on the label refer to?

Simply put, vintage refers to the year in which wine grapes were harvested. Because weather conditions can vary greatly from year to year, the style of wine produced can vary from year to year. But winemaking technology and equipment are so advanced today that even in less-than-ideal years, winemakers can still produce fine wines.

It's also important to note that wine doesn't get better with age. Every wine has a life curve, with its aromas and flavors dissipating after it reaches its peak, so it's important to be careful when you taste it.

Plus wine selection tips

If you don't know your wine preference, try thinking about your favorite food and drink:

If you normally like fresh citrus juices, then a fresh white wine with crisp acidity is likely to be your new favorite.

If you enjoy a cup of black coffee or strong tea every now and then, try a tannic, chunky red wine, such as Barolo from Italy and a red blend from Bordeaux.

After you have determined what type of wine you like, you can choose high-quality wines with the help of the world's leading wine competition awards and the scores of well-known wine critics. Although people's tastes and preferences are different, the score can not represent everything, but it can provide some reference for you to choose wine more intuitively.

Master this knowledge, you are a qualified entry-level wine player. Don't just talk about it, quickly buy a bottle of wine to try, meet your favorite wine is a very happy thing oh.