Model H6G

h6g

Claus Reactor Refractory Drilling System

The Delta Controls Model H6G Refractory Drill Kit is used to drill straight, centered holes through Claus Thermal Reactor refractory linings.

Hand-held positioning of a core drill bit during drilling is unacceptable and will not produce a hole usable for the Delta Controls thermocouple.  The drill guide is rigidly mounted on the vessel nozzle flange and works to keep the core drill bit concentric with the nozzle while the  hole is being drilled through the refractory liner. The final result is a straight hole which is properly positioned to accept the HRW Refractory Well and thermocouple.

Diamond cutting fragments are embedded in a ceramometallic matrix. As the diamonds cut and as the hole progresses, the matrix wears away. Dull diamonds tear away and expose new sharp edged diamonds. The torn off diamonds are then mixed in with the refractory cuttings. The cuttings, with still hard diamonds, must be flushed away with water as they form. Flushing promotes rapid cutting, and straight drilling. Water also cools the bit and lengthens its life.

 
Components of the H6G Refractory Drilling System
  Component Notes
Model H6G Components Core Drill 22” (558 mm) long, 2.2” (56 mm) diameter core drill with diamond cutting matrix
Model H6G Components Water Swivel Assembly Attaches between the drill motor and the core drill to provide water to the interior of the drill for wet drilling
Model H6G Components Drill Guide Bolts to the nozzle flange and guides the core drill to create a centered hole perpendicular to the flange
Model H6G Components Drill Bearings The bearings center the core drill in the drill guide during drilling
Model H6G Components Drill Extension Attaches between the water swivel and core drill. Used when the nozzle height + refractory thickness is greater than 22” (559 mm).  The EX option will have one or more of these extensions

Using the H6G Refractory Drilling System

 

Model H6GModel H6GModel H6GModel H6G

Specifications

Model H6G Components
  • Flange Size: ANSI 4” 150 to 6” 300 DIN 90 To 175 mm
  • Nozzle ID: 3.44” (87mm) and Larger
  • Nozzle Height + Refractory Thickness: Up to 22 inches(560mm) basic: add extension (option EX) if longer
  • Refractory Thickness: Up to 22” (560mm)
  • Hole Size: 2.20 Inches (56 mm)
  • Drill Bit: Diamond core type, requires water flushing
  • Water Swivel: Bronze bearings, rubber seals, flow control valve, ½” hex drill drive shaft; 3' hose
  • Drill Motor: ½” chuck size, 50 to 600 RPM variable speed required
  • Option:
    1. Water hose extension: 50 Foot (15 M)
    2. Drill bit extension, length as required 12”(300mm), 24” (600mm), or longer.

Applications

The Delta Controls Refractory Drilling System is used to drill straight, centered holes, through Claus thermal reactor refractory linings. The H6G guide is rigidly mounted on the vessel nozzle flange and works to keep the core drill bit concentric with the nozzle while the well hole is being drilled through the refractory liner. The final result is a straight hole which is properly positioned to accept the refractory well and the thermocouple.

This correct hole allows the refractory protective well to be inserted into the reactor and to automatically be in its proper position. The HTP or HTX thermocouple can then be mounted on the nozzle flange with assurance that its element protective well is correctly positioned on the centerline of the refractory protective well. This proper positioning protects the thermocouple from breakage by allowing the refractory to move in relation to the vessel shell without jamming the element well into the refractory well and breaking it off.

Note that attempting to drill using hand-held positioning of a core drill bit is unacceptable and will not produce a hole usable for the HTP/HTX thermocouple.

Additional Information

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Claus Reactor Refractory Drilling System

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