Thursday, June 30, 2016

Transfer Switching with Breakers ... In Less Than 2 Cycles

Transfer Switching with Breakers
Transfer Switching with Breakers
A good transfer switch is able to transfer the load from an alternative source with zero or minimal loss of power. So far this can be achieved with static transfer switches, but the investment costs are substantial and there are technical limits due to the drastic short circuit constraints. For these reasons conventional medium voltage circuit breakers are still installed widely in power genera on plants and utilities.

Read the rest / or download / the document below.

Wednesday, June 29, 2016

Custom Detonation Flame Arrestor Technology: Examples of Success

Custom Detonation Flame Arrestor
Detonation Flame Arrestor
Flame arrestors and detonation flame arrestors are critical components to the safe operation of industries around the world, including loading terminals and storage tanks, and in the chemical/petrochemical, pharmaceutical, landfill, wastewater, refining, automotive, industrial production, pulp and paper processing, and oil production markets.

Custom designs and specially engineered products to meet specific applications are commonplace. Flame arrestor engineering design teams must have a wide range of experience, expertise and engineering disciplines to meet the application performance requirements and still provide innovative yet cost-effective solutions.

One particular manufacturer, ENARDO, has a great reputation for custom flame arrestors. Here are two examples of meeting tough challenges.

Group B Detonation Flame Arrestor
Group B Detonation Flame Arrestor
(courtesy of ENARDO)
Group B Detonation Flame Arrestors For Vapor Recovery

A Fortune 50 chemical company required a solution to protect their plant from high pressure flame propagation in its piping system. The detonation flame arrestor application encompassed several stringent requirements, including high flow capacity and the extreme volatility and explosive parameters of Group B gases. Additionally, the size requirement exceeded that of existing proof-tested products.

ENARDO developed a design for this unique application incorporating advanced materials from the aerospace industry, 36" diameter advanced technology elements, 16" piping connections, pressure drop and flame detection, and a steam nozzle port.

A prototype was designed, constructed and tested to validate its explosion and flow capacities and is now operating successfully and remains one of the few detonation flame arrestors for Group B gases.

30” Detonation Arrestor
30” Detonation Arrestor
(courtesy of ENARDO)
30” Detonation Arrestor

A specialty chemical manufacturer in Deer Park, Texas needed a 30" detonation arrestor.  The custom engineered product ended up weighing in excess of 15,000 lbs.,  a 72" inch (1.8 m) diameter flame element, and 30" diameter flanges. This detonation arrestor is believed to be the largest ever supplied for commercial operation at the time of its installation. It is constructed of a carbon steel housing with a complete stainless steel internal lining for corrosion protection, plus:

  • A revolutionary internal system that allows for cleaning of the element without removal.
  • Built in accordance with ASME Section VIII.
  • Flow capacity of this specialized Group "D" detonation arrestor far exceeds that of any previously established in the industry.
For more information on any flame arrestor application, contact:

Arjay Automation
1178 E. Cliff Road
Burnsville, MN 55337-1577
Phone (800) 761-1749
Fax (612) 861-4292

Friday, June 24, 2016

Dust Monitoring Applications in Cement Manufacturing

Cement Plant
Cement plants have many areas requiring dust monitoring 
Cement manufacturing presents many applications and challenges for dust monitoring. There are several segments of the process that commonly provide the majority of dust monitoring applications. A unique design dust monitor, manufactured by Sintrol which uses Inductive Electrification technology is an ideal solution for many of these applications.

The monitor’s measurement is based on particles interacting with an isolated probe mounted into the duct or stack. When moving particles pass nearby or hit the probe a signal is induced. This signal is then processed through a series of advanced algorithms to  filter out the noise and provide the most accurate dust
Sintrol dust monitor
Sintrol dust monitor using
Inductive Electrification technology
measurement output. Classic triboelectric technology is based on the DC signal, which is caused by particles making contact with the sensor to transfer charges. Compared to DC based measurements, the Inductive Electrification technology is more sensitive and minimizes the influence of sensor contamination, temperature drift and velocity changes. By using the Inductive Electrification technology it is possible to reach dust concentration measurement thresholds as low as 0.01 mg/m3.

Areas Where Dust Monitoring is Found in Cement Manufacturing:

Crushing and Milling - In the raw materials handling process,  filtration systems are utilized to control emissions in the quarrying process of the plant. To minimize the loss of limestone and other materials that are fed into the kiln, dust measurement systems provide plant operators feedback on the deterioration or breakage of the bags in the filter. Monitoring the performance of these  filter systems also reduces the maintenance costs and downtime in plant operations.

Preheater and Rotary Kiln - In both dry and wet processes, materials go through some form of a heating process creating gases released on both ends of the kiln. There is typically a dust removal system and an emissions stack at each end. Filter leak detection provides an early warning that product is releasing into the atmosphere. Trend monitoring in common ducts and emissions monitors can provide trend data that enables plant operators to optimize the plant’s  filtration systems.

Clinker Mill - Once the clinker has been produced and passed into the cooling systems, it is important to maximize the production of cement in the plant. As the gases are passed through a dust removal system, the trapped particles are returned to the clinker silos as product rather than released into the atmosphere as loss. Particulate measurement in the outlet ducts of these  filtration systems is essential to optimizing the output of the plant. Identifying a broken  filter at the earliest stage allows plant operators to react quickly to breaches in the production output.

Packaging - In the last stage of production,  filtration units are used as product is transferred to packaging and shipping. Similar to the previous stages of the process,  filter leak detection and trend monitoring provides plants with tools to identify when cement is being released into the atmosphere. Dust monitors provide the perfect tool to ensure that the cement manufacturing process is able to optimize its total output.

Dust Monitoring Solutions Available for Cement Manufacturing:
leak detection
Sintrol leak
detection monitor

Filter Leak Detection - In each area of the process where there are single or multiple compartment
baghouses, Sintrol monitors are the perfect solution to provide notification to the customer of deterioration or breakage of the  filter bags. This provides early detection for the customer that excess particulate matter is in its process and releasing out of the stack. The monitors are largely maintenance free devices that can measure dust levels as low as 0.1 mg/m3.

Trend Monitoring - In many larger or combined outlet ducts, a continuous trend measurement is preferred to get a constant reading on dust levels in the process. A dust monitor allows the customer to identify increasing trends in the dust levels and possibly identify sources of extra pollutants in its process.

For plants that use Electrostatic Precipitators (ESP), monitors are available that allow the end user to
Sintrol ambient dust monitoring
Sintrol ambient
dust monitoring
get a continuous trend measurement in 4–20 mA output after an ESP. The user can learn about the efficiency of its ESP, optimize the hammering process, and make adjustments to maximize the efficiency of the filter system.

Emissions Monitoring - For each stack in the plant, monitors can be calibrated to provide extremely precise readings for actual emissions amounts. These virtually maintenance free monitors are a less expensive and more reliable alternative to the traditional opacity monitors that have been used historically.

For more information on any dust monitoring application, contact:

Array Automation
1178 E. Cliff Road
Burnsville, MN 55337-1577
Phone (800) 761-1749
Fax (612) 861-4292