Analysis and Treatment of Methanation Water Cooler Tube Bundle Leakage
Jiujiang Petrochemical Company, Jiujiang 332004, China
| Abstract: | Shell 1240E002 is circulating water, and the pipe (medium side) is industrial hydrogen / condensate. The heat exchanger has not been in operation from 2015 to 2021; from March to August 2022, there were three consecutive leaks, which brought great risks and unnecessary economic losses to the stable production of the device. This paper mainly analyzes the reasons for frequent leakage during operation, and studies the corrosion mechanism and formation reasons of circulating water, In view of the problems such as more calcium and magnesium plasma and suspended matter in circulating water, substandard water velocity, and flow dead zone caused by structural defects of tube bundles, feasible countermeasures were proposed, and verified by theoretical analysis and practical application. For example, reducing scaling can increase the backwash process, increase the samarium cobalt fluid processor, increase the water flow rate, optimize the baffle distribution to reduce the flow dead zone, regular sewage, improve the water quality to reduce the amount of suspended solids and mud; For example, to slow down the corrosion of the outer wall coating of the tube bundle (such as the internal anticorrosive process of the tube bundle for circulating water), reduce the content of chloride ions and dissolved oxygen in the circulating water, inhibit the production of microorganisms, strictly control the temperature of the inlet and outlet of circulating water, and adopt sacrificative anode protection technology to protect the tube bundle, etc., and finally reduce the occurrence of scale corrosion, so as to avoid leakage. Ensure the safe and stable operation of the device. |
| Keywords: | Leakage of Water Cooler; Corrosion Mechanism of Circulating Water; Backwashing; Samarium Cobalt Fluid Processor; Under-Deposit Corrosion |
| DOI: | 10.57237/j.cse.2024.01.001 |
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Received: 25 October 2023
Accepted: 11 November 2023
Published Online: 27 December 2023
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