Fault analysis of condensing air compressors
Thread Content
The condensing air compressor now consumes more turbine steam than designed, and is often overloaded； The maximum actual speed is 84% of the designed maximum speed ； The vacuum level dropped to one-fourth of its original value ； However, the hydrogen content in the dry gas after compressing the rich gas is twice that of the original. Let’s discuss whether this is due to changes in the rich gas composition and a decrease in compression efficiency, which leads to overload of the compressor, or it is caused by salt accumulation in the condensing compressor turbine or poor heat exchange performance in the reheat Device If it’s due to some reason, then how is it going to be solved?
In condensing-type compressors, the amount of steam used by the turbine is now higher than the designed value. There are generally four main reasons for this: 1. Low steam pressure; 2. Severe erosion in the turbine flow channels or salt accumulation on the stationary and rotating blades; 3. Low vacuum level – caused by leaks in the gas seal or in the condenser, as well as poor cooling effects, or an exhaust pump with insufficient capacity; 4. Changes in the composition of the compressed gas. It seems that it isn’t a decrease in compression efficiency that causes the compressor to operate under overload conditions, but rather issues related to the turbine of the condensing-type compressor
1. An increase in the hydrogen content within the rich gas indicates a decrease in its average molecular weight; as a result, the condensing compressor will not be overloaded. Therefore, it is not a process-related issue but rather a problem with the equipment itself； 2. First, check whether there is any leakage in the vacuum extraction section of the turbine ； Next, check whether there is scaling in the turbine wheel chamber and impeller ； Again, and most importantly, it is necessary to clean out the dirt and scale that have clogged the tubes and shell side of the condenser; otherwise, the vacuum level would not drop by such a large amount. We have encountered such a situation before and cleaned it up once.
As a result, the catalyst was poisoned, and the hydrogen content in the rich gas increased, causing the compressor to become overloaded. By removing material from the system, increasing the amount of feed and the frequency of feeding, the compressor improved suddenly after 3 days and returned to normal operation.
As a result, the catalyst was poisoned, and the hydrogen content in the rich gas increased, causing the compressor to become overloaded. By removing material from the system, increasing the amount of feed and the frequency of feeding, the compressor improved suddenly after 3 days and returned to normal operation.
As a result, the catalyst was poisoned, and the hydrogen content in the rich gas increased, causing the compressor to become overloaded. By removing material from the system, increasing the amount of feed and the frequency of feeding, the compressor improved suddenly after 3 days and returned to normal operation.
As a result, the catalyst was poisoned, and the hydrogen content in the rich gas increased, causing the compressor to become overloaded. By removing material from the system, increasing the amount of feed and the frequency of feeding, the compressor improved suddenly after 3 days and returned to normal operation.