A method for efficient on-line inspection of radiant tube cracks in non-oxidizing furnaces
A non-oxidizing furnace and radiant tube technology, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems of high labor intensity, potential safety hazards and high ambient temperature
Active Publication Date: 2022-04-26
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
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Problems solved by technology
[0005] Patent Publication No. CN110967147A "On-line search method for damaged radiant tubes of annealing furnace" proposes a method of detecting the temperature of combustion exhaust gas and the amount of residual oxygen in the exhaust gas pipeline to judge whether the radiant tube is broken. This method requires an oxygen analyzer with a probe that can extend into the radiant tube. Detection during the burning process of the burner, the ambient temperature is high, the labor intensity is high, and there are potential safety hazards
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Embodiment Construction
[0018] This embodiment is a method for efficient on-line investigation of the rupture of the radiant tube of the non-oxidizing furnace, which includes the following steps;
[0019] Step 1: Set the furnace oxygen content alarm value (the non-oxidizing furnace is equipped with a micro-oxygen analyzer at the inlet / outlet end, and some heat treatment furnaces also have a micro-oxygen analyzer in the middle). If the alarm value exceeds the alarm value, the alarm will be triggered. Relevant personnel began to analyze and find out the reason. After receiving the notification, first observe the change of the oxygen content in the furnace, whether it exceeds the standard when the furnace door is opened or when the furnace door is closed, and observe whether the furnace pressure drops to 0 when the furnace door is opened. If the oxygen content detection data is within the normal range, roll marks will also appear soon. It is considered that when the furnace door is opened, the air in th...
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The present invention is an efficient on-line checking method for the rupture of the radiant tube of the non-oxidation furnace, comprising the following steps: 1) checking whether other factors cause the oxygen content in the furnace to exceed the standard; 3) Determine the burner purging plan according to the current production load of the non-oxidizing furnace; 4) Group the burners in different areas of the non-oxidizing furnace according to the purging plan , carry out purging in turn, and monitor the oxygen content in the furnace in real time at the same time, if the change of oxygen content in one group of purging process is less than the standard value, switch to the next group for purging; 5) If a certain group of purging in step 4) When the change of oxygen content in the furnace exceeds the standard, it is determined that there is a crack in a certain radiant tube in the group, and then subdivided and purged one by one to check; the present invention can quickly locate the cracked radiant tube without affecting production, with minimal impact on production , improved economic efficiency.
Description
technical field [0001] The invention relates to the technical field of overhauling non-oxidizing furnaces, in particular to an efficient on-line checking method for cracking radiant tubes of non-oxidizing furnaces. Background technique [0002] The radiant tube has been working under high temperature and alternating load for a long time. If the maintenance is not timely, the radiant tube bracket is not adjusted in time after plastic deformation and elongation under the action of high temperature and gravity, or the burner heat exchanger is burned through and is not replaced in time, the It will lead to deformation and cracking of the radiant tube. Once the radiant tube is cracked, the amount of oxygen in the furnace will increase, and the roll printing problem that plagues the roller hearth type non-oxidation heat treatment furnace will become extremely acute. How to quickly find the cracked radiant tube and close the furnace? The nozzle is of great significance to ensure th...
Claims
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IPC IPC(8): G01M3/04
CPCG01M3/04
Inventor 王明亮瞿华山范珊曹锐
Owner WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD