SHIELD LITE SILO PROTECTION SYSTEMS - ENSURING SILO SAFETY FROM GROUND LEVEL
Hycontrol's SHIELD Lite Silo Protection System is the most advanced pressure safety system available for powdered product silos. No other system physically tests all the critical safety equipment on your silo before each filling with a single key turn on the control panel at ground level.
Silo protection systems play an essential role in silo safety. They prevent the over-pressurisation and over-filling of cement silos, lime silos, flour silos and a wide range of other bulk powder storage silos. Powder silos are typically pneumatically filled from road tankers – using compressed air to push powder from the tanker into the silo. However, unlike the delivery tankers, which can withstand several bar of pressure, storage silos can be damaged by pressures as low as one psi above atmospheric. Silos constructed from concrete can be vulnerable to even lower pressures.
Disasters Waiting to Happen - How Can We Prevent Silo Over-Pressurisation and Overfilling?
Unfortunately, many silo protection systems will not effectively operate when required and are disasters waiting to happen. The consequences of this can be catastrophic. Silos can rupture, pressure relief valves (PRVs) can blow and, in some cases, filter housings on top of the silo can be ejected from their mounts. Such an incident can result in injury or even death. Furthermore, the powdered product from the silo will escape into the environment, causing pollution.
There are several reasons for the failure of silo protection systems, including poor driver behaviour and lack of regular servicing. In many applications, operators ignore warning signs such as product discharge. It is common to see powder on top of silos. If this is the case, there is something wrong with the silo protection system or the filters.
Health and Safety Guidelines for Silo Protection and Silo Pressure Safety
The HSE and MPA (Mineral Products Association) lay down guidelines on the design and maintenance of silo protection systems. Such a system should include a PRV, a pressure sensor, a high-level alarm, and an auto-shutoff valve to prevent overfilling. Unfortunately, even with the installation of a well-designed system, unless it is regularly maintained, it may not work as intended if problems arise. Suppose the pressure builds up and the product is allowed to escape via the PRV. In that case, it will solidify in the atmosphere rendering the PRV useless.
Unfortunately, silo protection systems on top of silos are 'out of sight and out of mind', with limited access. Ensuring your silo protection system continues to function requires a ground-level testing (GLT) system, which physically tests all the critical components before every fill. In parallel, regular, thorough inspections of the protection system are essential. Just visually inspecting the parts is of no use at all.
Hycontrol's new SHIELD Lite SPS exceeds current guidance from the MPA and is the most comprehensive, competitively-priced system on the market.