Except for a few odd services, high liquid rate applications are typically the domain of either trays or random packings. Aside from the distributors, random packing designs are rather straightforward with the designer choosing the proper size to accommodate the fluid flow rates and achieve the desired efficiency. Trays, on the other hand, have a large variety of adjustable parameters and can be especially complex, especially when designed for high liquid rate applications.09/17/2007
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.01/05/2006
In addition to flow pressure, volume and material state, achieving and maintaining desired flow performance depends upon properly addressing some complicated design and operational issues. In this Chemical Processing Flow eHandbook, we identify strategies and solutions for aerodynamic, technical, mechanical and economic constraints including:
Hydrogen systems – Inspections and tests for ensuring safety and flow
Axial compressors – achieving and maintaining desired performance
Fight flow recirculation – why the phenomenon occurs in centrifugal pumps and how to correct it
Learn more about these best flow practices. Download your copy of this Chemical Processing Flow eHandbook now.07/16/2014
This Chemical Processing eHandbook takes a look at some of today’s mixing challenges for chemical manufacturers and some of the best practices that can be implemented to help along the way.
Download this Chemical Processing eHandbook for insights and strategies including:
- Prevent Problems with Fine Particles: Sampling is crucial and demands particular care.
- Quickly Estimate Reagent Addition Time: A simple equation suffices in many situations involving batch reactors.
- Understand Powder Flow Characteristics: A powder’s variables and external factors will greatly impact blender size and type.
When thinking of the processing of chemicals, we think of any activity including storing, using, handling, manufacturing, or moving chemicals at a site, and any combination of these activities. A common state in many of these activities is the flow - or rate - at which the chemicals are moving through a process. Accurately measuring flow can be a challenge for many chemical processors since so many factors can influence the chemical properties and subsequently the rate of flow. In this Chemical Processing Pressure eHandbook, we discuss considerations for flow management including:
- Pressure transmitters - how noise can pinpoint process problems
- The use of orifice plates - how insufficient flow conditioning often undermines measurement accuracy
- Robust Inferential Sensors - easier-to-develop-and-maintain sensors offer significant benefits for chemical processes
Download your copy of this Chemical Processing Pressure eHandbook now.10/29/2014
Designers who understand and can take advantage of the differences between fluid power and traditional electromechanical power can build machines that produce higher quality output with lower lifecycle costs. This white paper suggests that care must be taken, however, in selecting and sizing the hydraulic system elements and in tuning the motion controller for optimal performance.08/16/2005
This concise, compelling overview of best practices in purchasing and maintaining ethylene valve packages is an essential read for industry professionals. The white paper will tell you how to: 1) Select the right seats and seals; 2) Select the right coating materials; 3) Know the quality of the valves you're buying; 4) Find a trusted single resource for your valve package purchases; 5) Keep up with required maintenance.10/15/2013
Achieving better flow is a constant challenge for chemical processors. What happens when a liquid flashes? How do you consider the impact of inlet losses? How can you become more innovative using speed pipe installation?
This Chemical Processing eHandbook takes a look at how chemicals manufacturers are meeting these challenges head on. Download this Chemical Processing eHandbook for insights and strategies including:
• Watch Out for Two-Phase Flow where process performance can suffer dramatically when a liquid flashes;
• Nix Nozzle Nuisances and avoid flow problems by considering the impact of inlet losses;
• Case Study: Speed Pipe Installation - VIP PLUMBING of Cleveland, Ohio, used press fittings to make water- and air-tight connections when installing a stainless system at Royal Chemical's Macedonia, Ohio plant;
It’s not uncommon for chemical processors to have hundreds of piping and flow instruments to monitor, maintain and repair. When do you slope a process line? What happens when a precision instrument drifts out of calibration? In this Chemical Processing Flow eHandbook, we look at what it takes for chemical processors to master flow challenges in several areas including:
- Piping geometry – how draining, venting, fouling and other considerations affect piping geometry
- Various methods for avoiding thermal flow meter validation pitfalls
- Piping symmetry – why designers should consider the impact of unequal flows in branches
Learn more how to avoid common piping pitfalls. Download your copy of this Chemical Processing Flow eHandbook now.07/29/2015
Thermal flow measuring technology has come a long way since the introduction of thermocouple technology and early hot wire anemometers. Read this seven-page paper for the details.02/20/2006
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. It’s critical that a filter specifically designed for sampling applications be used rather than a general purpose filter. Read guidelines to ensure proper filtration and sample delivery to on-line analyzers in this white paper.09/23/2013
For chemical processors, ensuring a long-lasting, high-quality mix is a huge challenge regardless of the physical properties of the mixing component – liquid, gas, solid. In this Chemical Processing Mixing eHandbook, we take a look at mixing technologies including “open” batch operation, static mixers, hydrogenation and inline mixing. Understanding how each of these technologies works, the benefits and challenges can help you to avoid common mixing mix-ups. Download your copy and learn about:
- A number of technologies that can handle pipeline mixing
- How hydrogenation reactions can achieve greater conversion rates and thus better space/time yields
- Continuous powder wetting
- Inline mixing systems
- Modern in-line mixers
Avoid common mixing mix-ups. Download your copy of this Chemical Processing Mixing eHandbook now.08/26/2015
The use of microwave technology has come a long way since its debut decades ago. See why chemical processors should be considering the many benefits of using microwave compared to conventional heating and drying systems. Learn why microwave mixing will save you considerable time and money with a superior product quality.10/22/2012
This white paper outlines trends and opportunities for gasket standardization in processing plants ... including the potential for more reliable sealing, cost savings, inventory reduction, easier installation and safety practices. Steps are outlined for achieving success in gasket standardization across steel, glass-lined and FRP piping.10/18/2006
This white paper goes over the three major problems associated with poor pump piping and provides five rules to follow in order to avoid future pitfalls.06/14/2007
This article discusses process filtration approach developed for each technology stage starting from batch filtration in the lab to continuous filtration for the full-scale commercial operation. Process engineers must not “jump to conclusions”, a reference from Sherlock Holmes and Dr. John Watson who prove time and again is that there is no benefit to jumping to conclusions. Therefore, laboratory / bench top filtration testing is covered for problem analysis, technology selection and pilot and demonstration scale-up. The paper continues with the filtration testing and then scale-up to the commercial size. Finally, the paper concludes with a general review of the problem-solving skills of Holmes and Watson and how these skills can be utilized by process engineers as a framework for “idea-generation” when analyzing a new process scale-up.06/02/2015
Real Time Online Liquid Analysis to Prevent Product Loss, to Reduce Energy Consumption and to Minimize Waste Treatment Costs
Product losses and energy and waste treatment costs can be reduced significantly with Total Organic Carbon (TOC) monitoring. Reducing product loss results in savings in raw materials, energy consumption, and in water treatment charges. This means more products in production and less product in the waste water treatment plant.05/15/2012
L.J. Star’s new 13-page engineering handbook covers the selection and application of sight flow indicators in chemical and pharmaceutical applications. There are many types of sight flow indicators, and the choice of which type is best for a particular application and process system is discussed in detail. A handy reference for experienced engineers and a useful guide for those new to sight flow indicators, it offers a full overview of sight flow indicators, covering design, materials, types of indication, types of glass, accessories, plus installation and maintenance tips.05/14/2013
With changes in temperature, pressure, density and viscosity all affecting volumetric flowmeter measurement, how can continuous processors accurately measure the flow of fluids? Download this Special Report to find out how Coriolis flowmeters provide a direct mass measurement that is unaffected by changing process fluid characteristics improving both accuracy and optimizing operations at your plant.03/30/2009
Welded vessels play a key role in most processes. However, few plants now have in-depth expertise in materials selection, fabrication and design of such vessels. As a result, plant staff often make errors that can be costly as well as compromise the suitability and life of the vessel. This three-part special report provides practical pointers that can help you avoid common mistakes and get the most appropriate, durable and cost-effective vessel.
- Part 1 looks at a dozen important factors to consider in materials selection, including metal selection and appropriate use of corrosion allowances and coatings. It includes pointers gleaned from first-hand experiences that can help you avoid costly mistakes and delays.
- Part 2 provides tips on how to avoid delays and achieve savings in the fabrication process. It also covers techniques that can improve vessel reliability and thus forestall costly repairs down the road.
- Part 3 gets into design issues. It condenses the 5,000+ pages of the ASME Boiler and Pressure Vessel Code into a simple guide when specifying vessels, heat exchangers and tanks. It focuses on 10 key factors.
Download your Chemical Processing special report now.10/28/2014