Increasingly precise process control strategies, often linked to computer control, have accelerated the use of sophisticated on-line chemical composition analyzers in plant applications. Instruments such as gas and liquid chromatographs, ion chromatographs, laser optic instruments, atomic absorption instruments and specific ion analyzers, which were rarities in laboratories ten years ago, are now found routinely in plant settings.
While continuing miniaturization and “rugged-ization” of the electronics are making the instrumentation circuitry more tolerant of the plant environment, the level of contamination in plant samples compared to laboratory samples continues to plague the process. This white paper reviews the factors in plant operation that may affect the deliverability of acceptable samples and provides guidelines for addressing these factors.
In recent years, TOC analysis has become accepted in the industry as the standard method and the only reliable online method used to determine contamination in waters, to control processes, to prevent product losses and to minimize waste. It is especially important to monitor this parameter in applications such as condensate return water, boiler/feed water, etc. In boiler/feed water and in industrial steam generating systems, carbonic acid corrosion of condensate lines is often a serious problem. Depending on the application type, analysis of only one parameter (e.g., TC) is generally not sufficient to make any useful process decisions. Multiple-parameter analysis (TOC, TC, TIC, VOC etc.), as carried out in the Hach BioTector B3500c analyzer, is proven to be more useful and always superior to single-parameter analysis in the industry.
Oxygen measurement for safety and control is essential for process optimization in many chemical manufacturing processes. This white paper provides application details of probe-style TDL oxygen analyzers.
Automated water jetting removes hardened deposits from tanks and reactors quickly and thoroughly, saving hours of downtime and getting tanks back into service sooner. A new white paper explains high-pressure water jetting, introduces typical equipment, and compares the process with other methods.
The U.S. Occupational Safety and Health Administration’s Process Safety Management (PSM) Standard [29 CFR 1910.119(j)] require plant management to identify and address hazards. Further challenging plant management, the mechanical integrity (MI) element of the PSM has been difficult for many facilities to implement. In fact, PSM audits by OSHA have consistently demonstrated that MI accounts for a large number of citations at most facilities. In this Chemical Processing Special Report, we take a look at how to effectively implement strategies to comply with PSM standards including:
Common piping, hoses and valves hazards – what PHA (Process Handling Analysis) teams should look for to improve the quality of the hazard evaluation
MI element of PSM – an in-depth look at the stated MI requirements, the perceived interpretation of these requirements and further considerations for identifying your plant’s compliance strategy
MI implications – the impact MI has on plant’s written procedures, training, inspection & testing, and how equipment deficiencies and quality assurance programs are managed
An easy to use generalized vent sizing formula is illustrated to be consistent with large scale industry experience and dedicated phenolic runaway reaction tests performed by Fauske & Associates, LLC. The formula also clearly explains the 1999 catastrophic failure of a phenol-formaldehyde reactor resulting from a grossly undersized relief system.
Chemical, petrochemical, and oil-reﬁning plants are process-intensive operations with regulatory requirements to protect the surrounding water and air from the effects of industrial pollution. This paper reviews activated carbon adsorption, the reactivation process, liquid phase and vapor phase adsorption design guidelines, and typical applications of the technology in industrial/environmental treatment.
Dependable pH determination in chlor-alkali brine is notoriously difficult. Process conditions and high impedance signals from pH sensors mean maintaining measurement accuracy has been a headache for instrumentation engineers - until now.
Precise process control strategies have accelerated the use of on-line chemical composition analyzers in plant applications. Contaminants in plant samples are the most frequent cause of problems with on-line analyzers. Trace contaminants can rapidly build up and cause instrument failure.
Implementation of rapid loss on drying and ash analyzers significantly reduces testing times associated with traditional methods, allowing companies to bring products to market faster, increasing production. These features will aide biomass material manufacturers in maximizing control of the market.
Heat transfer fluids -- from mineral oils to synthetic and organic-based formulas -- are the lifeblood of many critical operations within the process industries. This special, interactive PDF looks at how plant personnel can better understand various fluids and fluid properties, and track the performance of their entire heat transfer system.
A complete alarm philosophy document (APD) covers all elements, including design principles, KPIs and escalation policies. Creating an APD to outline these elements is the first step in a successful alarm management project. This paper provides an overview for the essential parts of a complete APD.
In this white paper, we review the new possibilities offered by measurement systems based on polarographic technology. Unlike other systems, polarographic sensors are built directly into the process gas stream, eliminating the need for cumbersome gas sampling and conditioning systems. Further, polarographic sensors require very little maintenance.
20-page Sight Glass Application Handbook is a convenient reference for experienced engineers and a great primer for those new to sight glass selection. It offers a full overview of sight glasses for chemical processes, including types of glass, construction, lighting, installation and maintenance.
The ever present emphasis on technological efficiency is just one of several forces behind the pressure on companies to "go green" despite a trying economy. The ultimate criterion that determines whether a motor is truly green is energy efficiency. Technology, long the key to efficiency, can help resolve this issue.
Gaseous oxygen measurement with amperometric sensors is the most direct and easiest solution for oxidation and explosion protection.
Unwelcome oxygen Tank blanketing is the process of filling the headspace in storage vessels and reactors with an inert gas to prevent its contents from exploding, degrading or polymerizing and to protect equipment from corrosion. A blanketing system is normally designed such that it operates under higher than atmospheric pressures, therefore preventing outside air from entering the vessel. As oxygen and moisture in the air can be undesired in numerous processes and applications, blanketing is done in a wide range of industries, varying from (petro)chemical to food and beverage, pharmaceutical to pure water.
Heat exchanger efficiency is a critical factor in processing productivity, and tube bundles must be kept clear of deposits to maintain that efficiency. Automated high-pressure water jetting systems, with flexible or rigid lances, remove deposits 75% to 90% faster than manual methods and are more operator-friendly.
While the activity of alarm rationalization is straightforward, its application can range from simple to extremely complex depending on resources and objectives. This white paper introduces two basic methodologies: Bounded or Unbounded, and evaluates the benefits of each.
This application note from Delta Controls outlines selection and installation criteria for using admittance probes to monitor the level of powders, liquids and other materials. Dielectric constants of more than 200 materials are included.