Simulated work condition detecting method for 50,000 ton/year methionine propylene oxidation reactor

Abstract

The invention relates to a simulated work condition detecting method for a 50,000 ton / year methionine propylene oxidation reactor. The method comprises the steps that air is blown to an oxidizer through an air blower, air is heated to the temperature of 160-170 DEG C by an air heater, inputted hot air can gradually increase the temperature of the oxidizer to 160 DEG C to meet the requirements for adding fused salt, two sections of the oxidizer are filled up with the fused salt successively, the temperature of the oxidizing section increases from 160 DEG C to 350 DEG C, the salt temperature of the reaction section increases to 350 DEG C to be insulated for more than or equal to 24 hours, and the temperature of a quenching section gradually increases to 300 DEG C to be insulated for more than or equal to 24 hours. When the temperature of the oxidizing section and the temperature of the quenching section increase by every 50 DEG C in a temperature rise process, whether fused salt leaks out of an upper pipe plate and a lower pipe plate is checked, thermal insulation is carried out for 24 hours, fused salt leakage is not observed to prove that the equipment quality meets production and using requirements, and then the temperature is slowly cooled down. In detection, the quality defect which cannot be found in cold mold detection of a traditional detecting method is overcome and repaired in time, and a lot of economical loss caused by shutdown and repair of the quality problem is avoided.

Description

technical field [0001] The invention is a chemical equipment quality detection method, which is a new detection method invented by the higher production requirements of the equipment quality for propylene oxidation. The propylene oxidation reactor, the key equipment of the 50,000 tons / year methionine project, simulates the operation method of quality inspection under working conditions. Specifically, how to judge the quality assurance and safety assurance of this key equipment before it is put into production. Background technique [0002] In the production process route of methionine, one of the important links is the process of producing acrolein from acrylic acid, and the core equipment is the oxidation reactor. The oxidizer 5 is divided into two sections, the reaction section and the quenching section, which are respectively connected in parallel with the electric heater 1 in the quenching section, the electric heater 9 in the reaction section, the molten salt cooler 2 ...

AI Technical Summary

Problems solved by technology

my country's first 10,000-ton / year methionine production device, the manufacturer has passed the self-inspection and the owner's quality inspection after the equipment is manufactured, but in actual production, processing defects have been exposed, and it is very difficult to repair it again, causing damage to the owner Huge economic loss, early detection of quality problems before actual feeding can prevent the above things from happening, and ensure safety in production

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