HRG CLAUS REACTOR REFRACTORY DRILLING SYSTEM

PRODUCES THE REQUIRED ENTRANCE HOLE FOR THE HTP THERMOCOUPLE

Download the Delta Controls Model HRM Detailed Datasheet 

Application

The Delta Controls HRG refractory drilling system is used to drill straight, centered holes, through Claus thermal reactor refractory linings. The HRG 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 HTP 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 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 HTP 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 thermocouple.

Specifications

• 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 if longer
• Refractory Thickness: Up to 22” (560mm)
• Hole Size: 2.20 Inches (56 mm)
• Drill Bit: Diamond core type, uses 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.

Hole Drilling Procedure

• Start by putting the HRS refractory stop in place before the refractory is installed. This will provide a flat face located at the bottom of the mounting nozzle.
• After the refractory has set, remove the HRS refractory Stop and install the HRG drill guide body on the mounting flange face.
• Assemble the drill bit, water swivel, and drill motor.
• Put the drill bit down into the guide and connect the water hose.
• Ease the bit down against the refractory face and open the water flow control valve.
• Hold or clamp the drill motor securely to prevent injury and drill thru the refractory.
• Inspect the hole to verify the result.
• You can download a video (25Mb) illustrating the use of the HRG Drilling System in a thermocouple Installation.

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 included with the standard HRG Drilling System: DB1 Core Drill Bit Drill Bearings Flanged Drill Guide Water Swivel Adapter Optional Items: 50 ft water hose 1/2" Drill motor
HRG Drilling System for small nozzles For Nozzles with I.D. 3.4” and smaller, the I.D. of the nozzle is used as the drill guide. Therefore the nozzle cleanout tool, Model NSO, is provided to remove the scale, weld bead and buildup on the ID of the nozzle. The HRG drill system for use with these small nozzles does not include the flanged drill guide.

Go to Delta Controls Model HTP Thermocouple Page

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