summary
Granules (GR), abbreviated as granules, are granular preparations made by processing additives such as raw materials and carriers. The earliest field trials of granules began in 1946. In the early 1950s, they were widely used in the United States, and in the early 1960s, they began to be widely used in Japan. In the late 1960s, due to the development of environmental science, pesticide granules were widely promoted and applied worldwide to avoid pollution to the environment and crops caused by particle drift during pesticide powder distribution. The development of granules in our country mainly occurred in the late 1970s. In 1989, the Ministry of Chemical Industry calculated that granules accounted for about 7% of the entire pesticide formulation.

The reason why granules can become a commonly used pesticide is because they have many unparalleled characteristics, such as:
① When applying pesticides, it has directionality, allowing the spread of pesticides to fully reach the target organisms and ensure the safety of beneficial organisms such as natural enemies;
② The medicinal granules do not adhere to the stems and leaves of plants, avoiding direct contact and causing phytotoxicity;
③ There is no dust flying during pesticide application, and it does not pollute the environment;
④ During the pesticide application process, it can reduce the operator's body attachment or inhalation of the dosage, avoiding poisoning accidents;
⑤ Reduce the toxicity of highly toxic pesticides and prevent poisoning of humans and animals;
⑥ Can control the release rate of active ingredients in granules and extend their shelf life;
⑦ Easy to use and highly efficient.

In summary, pesticide water dispersible granules (WDG). The International Federation of Pesticide Industry Associations (GIFAR) defines it as granules used after disintegration and dispersion in water. Water dispersible granules are mainly composed of pesticide active ingredients, dispersants, wetting agents, binders, disintegrants, and fillers, with a particle size of 200 μ m-5mm. After entering water, they can quickly disintegrate and disperse, forming a high suspension dispersion system.
The company can conduct engineering design according to the actual requirements of users. Currently, the output of a single production line is available in 100kg/h, 200kg/h, 300kg/h, 500kg/h, 800kg/h, etc.

Equipment characteristics of WDG pesticide water dispersible granule production line
1. The WDG pesticide water dispersible granule production line adopts the form of integrated crushing, mixing, granulation, drying, cooling, screening, and packaging sections, which have clear functions and can be organically combined for coordinated operation, achieving process flow operation.
2. The core part of this production line is the drying system. Adopting segmented heating method, the pre drying section adopts high-pressure low air volume fan to fully fluidized the relatively wet WDG particles; The drying section adopts a low-pressure and high air volume fan, which takes away a lot of moisture per unit time and dries evenly; The cooling section adopts a high volume fan, which can quickly remove heat and reduce product temperature, meeting the requirements of moisture control and facilitating subsequent packaging processes.
3. Drying medium circulation system: The blower, heater, and inlet duct are made of stainless steel to avoid the possibility of product contamination caused by unclean air.
4. The upper and lower beds of the drying machine adopt a quick opening structure, which changes the traditional structure of bolted connections and greatly facilitates thorough cleaning of the system.
5. The hole pattern of the bedding board adopts a combination structure, with tongue shaped holes in the front section to allow materials to move forward smoothly without leakage; The middle and rear ends adopt straight holes, which have a higher penetration rate of hot air and more sufficient heat exchange during the drying process.
6. The interior of the bed body is made of stainless steel fully welded to prevent sewage from entering the insulation layer during cleaning, which may affect product quality. It also has a cleaning port for easy equipment cleaning.

The process flow and production equipment of WDG pesticide water dispersible granule production line:

Production process 1: Weighing ingredients → Mixing (ZGH type vertical high-speed mixer) → Granulation (ZL type rotary granulator) → Drying (XF type boiling dryer or ZLG series vibrating fluidized bed) → Screening (ZS, FS type oscillating screen) → Loading (ZKS vacuum feeder) → Packaging
Production process 2: Weighing ingredients → One step method (XLB type cyclone bed granulation coating machine) → Screening (ZS type oscillating screen) → Loading (ZKS vacuum feeding machine) → Packaging