Displaying 101–125 of 216 results for Andrew Sloley, Contributing Editor

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Ponder Parallel Paths

(Article)

Parallel flow paths must have the pressure drop between two points. This can provide a powerful tool for analyzing utility systems such as cooling water, plant air and fuel gas, and understanding many process systems.

Preclude Packed-Column Problems

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Packed distillation columns can suffer performance and reliability issues if liquid feed isn’t properly mixed with liquid already in the column. Poor design of liquid entry usually is the root cause of inadequate mixing.

Properly Assess Economics

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Each of the three most common methods for evaluating the economic value of projects provide different results. Here are some guidelines to help you choose the right method for a specific type of project.

Properly Tackle Thermal Expansion Issues

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Temperature rises can cause significant increases in equipment size or pipe length, leading to potential damage from internal stress. Here are some tips for tackling thermal expansion issues

Automation: Carefully Consider Sidestripper Control

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When choosing the main control for sidedraw systems, there are three possible options. Here, we take a close look at each.

Don’t Trust Data Sheets

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Don’t fall into the trap of thinking that equipment operation won’t deviate much from what’s on the data sheet.

Maintenance: Shift Your Approach to Abandoned Equipment

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Abandoning equipment inside an active process unit is rarely a good idea. It creates safety problems and usually costs more in the long run.

Prevent Metering Pump Mayhem

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When correctly specified, metering pumps provide accurate dosing of liquid additives. Here’s six key factors to consider before purchasing a metering pump or making service changes and when troubleshooting.

Prevent Paired-Pump Problems

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Putting pumps in series may lead to mechanical and other problems.

Process Modeling Software: Get Real About Your Simulations

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Process modeling software usually plays a key role in designing and modifying plants; it’s imperative to be aware of a variety of issues that can cause simulation failures.

Processing Equipment: Does Early Ordering Make Sense?

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Ordering equipment before a plant knows exactly what’s needed may offer advantages. However, early ordering comes with tradeoffs.

Processing Equipment: Nix Nozzle Nightmares

(Article)

Revamp, which involved switching from one-pass to two-pass trays, cut capacity instead of increasing it.

Pump Selection: Defeat a Double Whammy

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Select the proper pump to handle low suction head, vapor in the feed and cavitation.

Tame Tough Dosing Duties

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Precise dosing of liquid additives is essential in a variety of processes. Consider a variety of control approaches to achieve accurate dosing.

Achieve Optimal Control of Fired Heaters

(Article)

When choosing between a pressure controller and flow controller for fired heaters, new research from API offers some guidance when fuel composition varies.

Chemical Engineering Resources: Go Online to Solve Problems

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Several websites contain troves of information that can help when troubleshooting problems.

Don’t Get Duped By Deficient Data

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Estimates of solubility often require care to avoid irksome surprises

Fluid Handling: Head Off Cavitation

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When proper design fails, sometimes you can inject air into pumps to prevent cavitation.

Get Full Value from Partial Condensers

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Partial condensers handle vapor and liquid, thus require attention to potential flooding at the vapor inlet to the tube.

Instrumentation Troubleshooting: Do Simple Things Right!

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A simple task such as reading pressure measurements actually can be harder than it seems.

Plant Design: Reduce Revamp Risks

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Successful plant revamps requires consistent application of basic principles and understanding the plant and its objectives. Here’s some tips for successful change.

Pressure Gauges: Deflate Random Errors

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Take steps to minimize the impact of random errors on the accuracy of pressure readings.

Process Safety: Emulate What Works for Airlines

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In a process plant, checklists fill key purposes — improving safety, profits and reliability.

Processing Equipment: Consider Cooling Boxes

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Cooling boxes can provide an effective, economical option for some duties, but pay attention to overall design and evaluation, fouling, and water makeup.

Stifle Simulation Snafus

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Effective simulation modeling requires knowledge of the process as well as correlation limits, and understanding the limits of the software.

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