Sampling calibration pretreatment system for EOEG device

Abstract

The invention provides a sampling calibration pretreatment system for an EOEG device, which comprises a process pipeline and an on-line analyzer, and is characterized by further comprising a large reflux pipeline, a bypass filter, an on-line analysis pipeline, a sampling bottle sampling pipeline, a first control valve and a drainage device, one part returns to the process pipeline through a large backflow pipeline, the other part is filtered by a bypass filter and flows to a first control valve, firstly, a sample enters a sampling bottle sampling pipeline through the first control valve to be sampled, then is switched to an online analysis pipeline through the first control valve, flows to a drainage device through an online analyzer, and finally flows to the process pipeline through the bypass filter. The pressure difference formed by the flow velocity of the sample in the large backflow pipeline drives the sample flowing through the drainage device to enter the large backflow pipeline, and the device can stably operate under complex working conditions, so that the stable operation of the device is ensured, and meanwhile, the effects of energy conservation and emission reduction are achieved to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of sample pretreatment, in particular to a sampling calibration pretreatment system for EOEG devices. Background technique [0002] Ethylene oxide (EO) is an important organic chemical raw material in ethylene derivatives. It is widely used in polyester fibers, resins, disinfectants and monomer ethylene glycol (EG) used in antifreeze. The ethylene oxide device is An important part of the integrated ethylene project, and also one of the important devices in the petrochemical industry, its production mainly adopts the ethylene oxidation method. [0003] The main reaction of ethylene oxidation is: [0004] The main side effects are: [0005] The carbon dioxide generated by the side reaction can be absorbed by potassium carbonate solution, and the ethylene oxide generated by the main reaction will undergo hydration reaction with water, and then undergo multi-effect evaporation and drying tower separation a...

AI Technical Summary

Problems solved by technology

Caused a lot of pollution to the atmosphere or unnecessary waste of samples

For direct return to the sample pipeline, because the analysis system has strict requirements on the lag time, and the outlet back pressure of the analyzer will cause fluctuations in the analysis value, it is difficult to balance the relationship between pressure drop, lag time, and outlet back pressure, and an external pump is often required. That is, stable operation cannot be guaranteed, and resources are wasted

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