Last updateThu, 22 Mar 2018 4pm



Improve Ethylene Conversion: Critical Control Valves for Cracked Gas Processing

Improve Ethylene Conversion

Maximum ethylene production requires several conditions: a highly saturated feedstock, high coil outlet temperature, low hydrocarbon partial pressure, short residence time in the radiant coil, and rapid quenching of the cracked gases. Out of these, cracked gas quenching is the only condition occurring downstream of the furnace, and is one of several steps that must occur before hydrocarbon fractionation occurs.

Emissions’ Standards, Innovation and Safety Highlight Technical Seminar

The theme of VMA’s 2014 Technical Seminar and Exhibition event was “Valve Emissions for Compliance, Standards and Technology” and the presenters covered the subject from every angle. Keynote speaker Ken Garing is with the U.S. Environmental Protection Agency – NEIC – and opened the event with a comprehensive report on why it is so important to monitor and reduce fugitive emissions.

Valve Automation Solution for Unconventional Shale Gas Challenge

gas pipelineWith the rapid development of unconventional shale plays throughout the U.S. has come the challenge of transporting product to refiners and markets. The large number of wells and the high volume of natural gas being produced has led to an increase in the size and number of gathering and other midstream pipelines.

Proactive Defect Detection with Simulation Software

smelterThrough-wall leakers in cast valve bodies often can be the end result of undetected defective areas created during the metal casting process. Such failures in service are extremely undesirable for valve manufacturer as well as the end user and in many cases such failures could pose significant health and safety concerns.

This article details the challenging nature of defect detection as related to through-wall leakers in typical cast pressure containing units. A discussion of common casting defects and the limitations of common defect detection methods or nondestructive evaluation (NDE) is provided. Finally, casting process simulation is described and presented as a means of detecting and eliminating the casting defects that commonly lead to the failure of valve castings.

Improve Ethylene Conversion Part One: The Furnace

Action ShotOlefin production plants use a variety of feedstocks. The type of feedstock used will impact the type of recovery technology used, but no matter the feedstock, control valve performance is an essential part of plant operations.

In this, the first of a three part series, critical control valve applications in the furnace section will be discussed. There are alternative product recovery configurations, which include front-end de-ethanizer for plants utilizing light feedstocks and front-end de-propanizer for plants using heavier feedstocks, but the focus in this article is on the front end de-methanizer configuration because of its ability to allow for a variety of feedstocks.



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