Positive pressurized containers play a pivotal role in ensuring the safety of equipment and personnel in environments where explosive or flammable materials are present. This article delves into the essential principles behind these containers and their significance in achieving explosion-proof requirements.
The positive pressure explosion-proof container operates by utilizing the container shell to meet technical standards for explosion-proofing. This allows the installation of regular non-explosion-proof machinery and electrical equipment within the container while ensuring safety.
A critical component of the positive pressurized container is the positive pressure ventilation system. This system is instrumental in achieving explosion-proof conditions within the container. Here’s how it works:
- Automatic Activation: Upon turning on the total power supply, the system triggers the explosion-proof blast system automatically.
- Fresh Air Inflow: Fresh air, extracted from a safe distance of 30 meters outside the danger zone by an explosion-proof centrifugal fan, is introduced into the positive pressure box.
- Purging Process: The incoming air purges the positive pressure box, establishing a positive pressure of over 50pa. This purging process lasts for approximately three weeks.
- Controlled Power Activation: Once the control conditions are met, the total power supply is automatically activated, allowing controlled power supply to the equipment within the container.
- Monitoring and Alarm System: The explosion-proof control system continuously monitors the conditions inside the box. If dangerous gases are detected or if the required positive pressure is not reached, the alarm system activates. In case the control conditions are not met within a specified time, or if the alarm limit is exceeded, the non-explosion-proof control system in the box shuts down automatically, ensuring the intended explosion-proof outcome.
