Non-destructive testing of the lining of a process vessel
AssigneeP-Response IP Pty Ltd
InventorGreg Palmer
Life of this patent
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Abstract
A process for the non-destructive testing of a refractory lined process vessel including the steps of: (a) striking an external wall of a process vessel internally lined with a refractory material with an impulse hammer; (b) measuring selected frequency characteristics of the refractory lined process vessel; and (c) analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from the measured frequency characteristics.
Claims32
A process for the non-destructive testing of a refractory lined process vessel comprising a vessel having an outer shell having a refractory lining positioned adjacent an inner wall of the outer shell, comprising the steps of:
- (a) striking an external wall of a process vessel internally lined with a refractory material with an impulse hammer;
- (b) measuring selected frequency characteristics of the refractory lined process vessel;
- and
- (c) analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics by determining at least one of relative flexibility of the refractory lining, vibration modes of the refractory lining, relative density of the refractory lining, thickness of the refractory lining, delamination of the refractory lining, de-bonding within the refractory lining, and relative softness of the refractory lining.
A process for the non-destructive testing of a refractory lined process vessel comprising the steps of:
- (a) striking an external wall of a process vessel internally lined with a refractory material with an impulse hammer;
- (b) measuring selected frequency characteristics of the refractory lined process vessel wherein the frequency characteristics of the refractory lined process vessel selected for determining the integrity of the internal lining of refractory material are selected from the group consisting of dynamic stiffness, average mobility, slope of average mobility, peak mobility, peak to average mobility ratio and combinations thereof, wherein the dynamic stiffness of the refractory lined process vessel is obtained from the mobility slope in the low frequency range, and wherein the dynamic stiffness is determined from the mobility slope in the low frequency range between 0 and 200 Hz;
- and
- (c) analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics.
A process for the non-destructive testing of a refractory lined process vessel comprising the steps of:
- (a) striking an external wall of a process vessel internally lined with a refractory material with an impulse hammer;
- (b) measuring selected frequency characteristics of the refractory lined process vessel wherein the frequency characteristics of the refractory lined process vessel selected for determining the integrity of the internal lining of refractory material are selected from the group consisting of dynamic stiffness, average mobility, slope of average mobility, peak mobility, peak to average mobility ratio and combinations thereof, wherein the dynamic stiffness of the refractory lined process vessel is obtained from the mobility slope in the low frequency range, and wherein the dynamic stiffness is determined from the force curve (slope) between 0 and 1000 Hz;
- and
- (c) analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics.
An apparatus for the non-destructive testing of a refractory lined process vessel comprising a vessel having an outer shell having a refractory lining positioned adjacent an inner wall of the outer shell comprising:
- (a) an impulse hammer for striking an external wall of a process vessel internally lined with a refractory material;
- (b) one or more accelerometers for measuring selected frequency characteristics of the refractory lined process vessel;
- and
- (c) a computer for analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics by analysing the measured frequency characteristics and determining at least one of relative flexibility of the refractory lining, vibration modes of the refractory lining, relative density of the refractory lining, thickness of the refractory lining, delamination of the refractory lining, de-bonding within the refractory lining, and relative softness of the refractory lining.
An apparatus for the non-destructive testing of a refractory lined process vessel comprising the steps of:
- (a) an impulse hammer for striking an external wall of a process vessel internally lined with a refractory material;
- (b) one or more accelerometers for measuring selected frequency characteristics of the refractory lined process vessel;
- (c) a computer for analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics;
- and
- (d) wherein the computer determines the dynamic stiffness of the refractory lined process vessel is obtained from the mobility slope in the low frequency range between 0 and 200 Hz.
An apparatus for the non-destructive testing of a refractory lined process vessel comprising the steps of:
- (a) an impulse hammer for striking an external wall of a process vessel internally lined with a refractory material;
- (b) one or more accelerometers for measuring selected frequency characteristics of the refractory lined process vessel;
- (c) a computer for analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics;
- and
- (d) wherein the computer determines the dynamic stiffness of the refractory lined process vessel is obtained from the force curve (slope) between 0 and 1000 Hz.
Dependencies are inferred from the claim text.