Why Grain Silos Need Ventilation and Fumigation?

Grain Silo Introduction

The grain silo system refers to a system of facilities and equipment used to store and transfer grain, mainly including silo groups, entry and exit equipment, ventilation systems, fumigation systems, cleaning and measurement equipment, etc. The design and management of grain silo systems are of great significance to ensure grain quality, prevent pests and reduce losses. Steel silo is a common type of grain silo, usually used to store and transfer bulk grains, such as grains, beans, etc.

Introduction to Ventilation System and Circulation Fumigation System

The circulation fumigation system in the steel silo mainly consists of a phosphine generator, a circulation fumigation fan, a circulation pipe, a silo bottom air duct and a fumigation concentration detection device. The circulation fumigation system uses circulation fumigation fans and fumigation pipes on the top of the silo to press the phosphine gas into the vertical air duct at the bottom of the silo. After passing through the grain pile, it forms a circulation through the return pipe of the fumigation box to promote the circulation of phosphine gas. The distribution in the grain pile is uniform. When the concentration of phosphine gas in the grain pile reaches the fumigation operation requirements, the fumigation system is turned off and maintained for a certain period of time, causing the pests to suffocate and die, thereby achieving the purpose of killing insects.

The ventilation system of the grain silo mainly consists of axial flow fans on the top of the silo, air ducts on the bottom of the silo, ventilation ducts on the bottom of the silo, and ventilation units. A ventilator is installed at the bottom of the grain silo to introduce dry air (or cooled gas) from the outside into the ventilation trough (or ventilation floor cage, ventilation pipe, etc.) in the grain silo through the ventilation duct. The diffused gas continuously interacts with the heat and humidity between the grain piles in the grain silo. The air undergoes heat exchange, and under the synergy of the axial flow fan (or natural ventilation hole on the top of the silo) installed on the top of the silo, the hot and humid air on the grain surface in the silo can be discharged in time, which not only accelerates the directional flow of air in the silo, but also prevents condensation caused by the large temperature difference between the inside and outside of the silo; At the same time, the temperature of the space on the top of the silo can be adjusted to dissipate the moisture and heat in the upper and surface layers to prevent the upper and surface grains from being affected by high temperatures, thereby achieving the purpose of reducing grain temperature and balancing temperature and humidity.

The Role of Ventilation System and Circulation Fumigation System in Grain Storage System Solution

The ventilation system and circulation fumigation system each play an important role in the grain storage system solution, jointly maintaining the safety and quality of grain and ensuring long-term storage of grain. Proper design and operation of these systems can effectively reduce grain losses, improve storage efficiency, and provide strong support for the healthy development of the grain industry. Their roles in grain storage systems are introduced below:

Function of Ventilation System:

Adjusting the temperature and humidity in the grain silo: The ventilation system can adjust the temperature and humidity in the grain silo to prevent the grain from getting damp and moldy. Ventilation and moisture removal can reduce the moisture content in the grain and help keep the grain dry.

Heat dissipation: During high temperature seasons, the ventilation system can help dissipate the heat inside the grain silo, maintain a suitable temperature inside the grain silo, and prevent the grain from deteriorating due to heat.

Prevent pests: Ventilation can reduce the temperature and humidity inside the grain silo, reducing the conditions for pests to breed and reproduce, thereby preventing pests from invading the grain.

Function of Circulation Fumigation System:

Pest Prevention and Control: Circulation fumigation system can comprehensively and effectively eliminate pests in the grain silo by releasing corresponding pesticides or fumigants. This helps prevent pests from breeding and multiplying in grain silos, protecting the quality and quantity of grain.

Disinfection and Mildew Prevention: The fumigation system can also disinfect the grain, kill possible mold, bacteria and other microorganisms, and effectively prevent grain mildew and contamination.

Extended storage life: Through the treatment of the circulation fumigation system, the storage life of grains during storage can be extended, the freshness and quality of grains can be maintained, and the economic benefits and utilization value of grains can be improved.