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Under the coordination of relevant offices, Hubei Green Cleaning Company drafted a 301 cleaning plan. The environmental protection workshop reviewed the plan and revised it according to the actual situation of the workshop. At 13 o'clock on the May 22th, Hubei Green Cleaning Company shipped the ice to the site. 13:46 The environmental protection workshop organized personnel to change the circulating water process. In order to make the chemical cleaning effect better, the environmental protection workshop was backwashed with fresh water for 8 minutes. The flushed water was found to be cloudy. Subsequently, Hubei Green Cleaning Co., Ltd. cleaned and replaced 301/1 and 2, during the cleaning process, the environmental protection workshop exchanged the inlet valves of 301/1 and 2 were adjusted, the cleaning work ended at 16:46, and the total chemical cleaning was 3 hours. .
After this online chemical cleaning, the flow of circulating water does not increase, the temperature at the outlet of the scrubber rapidly drops, and the temperature can be controlled at about 38 degrees without changing fresh water in the 301/1, 2 and the dry and absorbed acid concentration can be restored. 95.5% and 98.6%. The online cleaning change 301 reduces the number of downtimes of the device and reduces the secondary failure of the device during the start-up and shut-down process.
Jingmen Petrochemical's environmental protection workshop successfully made the first on-line cleaning of the sulphuric acid plant 301/1 and 2 on May 22, 2009.