Model HRC ProSpection™

Process Camera, Sulfur Processing Service

The Delta Controls Model HRC ProSpection™ Process Camera is designed for the primary purpose of reliably monitoring the interior of a Claus thermal reactor. Model HRC ProSpection™ is intended for either short term online inspections or continuous monitoring. ProSpection’s design and suitability for the thermal reactor is the result of attention to detail and more than 50 years of experience in the sulfur recovery industry. The camera probe places the camera and lens directly at the refractory hot face, allowing for a wide-angle view of critical vessel components such as the burner, refractory, and tubesheet.

The camera is designed to be inserted through an isolation valve while a vessel is online and can either be left inserted indefinitely or used temporarily for an inspection. A flanged seal assembly incorporates multiple redundant seals so that the camera inserts and retracts without process leakage. A nitrogen supply applies positive back pressure to the seals. In the event a seal is compromised, the nitrogen flows through the damaged seal and into the reactor. An inline flow meter would indicate the flow and that a seal has been compromised. This system prevents any process gases leakage and serves as an indicator of seal integrity.

The patent pending thermal regulation system uses water or air circulated through a series of channels to accurately regulate the probe’s temperature between the sulfur dew point corrosion and high temperature sulfidation limits. It also maintains the camera circuitry within its operating temperature in addition preventing lens occlusion by maintaining the lens temperature above sulfur’s freezing point.

The camera utilizes an pneumatically driven system that actuates the camera in and out of the vessel. Failsafe features optimize the camera for long-term operation. The camera automatically orders its own retraction for a number of fault conditions such as loss of coolant, high camera temperature, loss of power or loss of instrument air. The extraction assembly contains an onboard air tank to safely remove the camera in case air supply is lost.