بایگانی‌های nitrogen - dawnbreeze

Peak Scientific company unveils new nitrogen gas solution


Peak Scientific has launched a new gas solution for Shimadzu high-flow LC-MS/MS systems.

Modelled on the Genius XE nitrogen gas generator, Peak Scientific’s Genius XE SMZ offers Shimadzu customers a tailored solution in a compact unit. 

Sharing details on the innovation, Peak Scientific said the solution is capable of generating high gas flows with one nitrogen output at up to 29 litres per minute and one air output at up to 27 litres per minute.

Petra Gierga, Product Manager for Peak Scientific, said, “We’re delighted to be able to offer Shimadzu customers a cost-effective, space-saving and OEM-approved gas solution for high-flow LC-MS/MS Systems, including Shimadzu’s latest LCMS-8060NX.

Peak Scientific has been collaborating with Shimadzu since 2009, where we have worked in conjunction to develop gas generator technology for specific applications. With all these years of hard work and research, Genius XE SMZ is Peak’s culmination of the ideal gas solution for Shimadzu’s customers.”

Unlike bulk gas sources, such as nitrogen gas cylinders, Genius XE SMZ only requires a one-time delivery for installation, thereby eliminating the repeated costs of bulk gas transportation, rental and third-party contracts.

Genius XE SMZ’s plug-and-play user-friendly operation means labs can also remove the extra costs for staff safety training.

 

Source: gasworld and peakscientific

What is Nitrogen?

  • Nitrogen makes the most layer of the atmosphere, which means that it’s include%78.08 of the air volume and %75.5 of the air weight.
  • Nitrogen gas is colorless, odorless, tasteless, non-toxic and almost neutral and colorless in liquid form.
  • Nitrogen is non-flammable and has no role in combustion. This gas combines with some active metals such as lithium and magnesium also a type of nitrate.
  • This gas has the ability to combine with hydrogen, oxygen and other elements at very high temperatures dissolve very little nitrogen in water and other liquids and is also a very poor conductor of electricity and heat.

Available nitrogen grades:

%99.9999 – %99.9995 – %99.999 – %99.998 – %99.99 – %99.9


Tanks and maintenance:

  • The gas-phase of Nitrogen can be transported and stored in pressurized Venice cylinders in trailer tubes.
  • Nitrogen in the liquid phase is transported and stored in small portable fluxes and cryogenic tanks

Compatible and incompatible materials:

  • Nitrogen is a neutral, non-corrosive gas that can be used in all systems made of ordinary metals.
  • At liquid nitrogen temperatures, carbon steels and many steel alloys lose their malleability.
  • Suitable materials for use in the presence of liquid nitrogen are stainless steel (eg types 304 and 316) and other alloys of nickel, chromium, copper, monel, brass and austenitic aluminum.
Molecular Weight 70.906
steam pressure 786.7 K. Pa @ 21.1 0C
Gas density 3.2127 Kg/m3 @ 0 0C and 1 atm
The latent heat of evaporation at the boiling point  288.08 KJ/Kg
Special heat capacity CP=0.48422 KJ/Kg.0C

CV=0.36 KJ/Kg.0C

CP/CV=1.334

Critical temperature 143.750C
Critical pressure 7977.5 KPa(a)
Ability to dissolve in water 0.7% vol.(gas)/Vol.(Water) at 0 0C and 1 atm
Explosion / ignition range in air Poison gas , Oxidizer

Material Compatibility of Nitrogen

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez

GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1017
UN 1017 UN 1017 UN NUMBER
Chlorine Chlorine Chlorine UN SHIPPING NAME
2.3,5.1 2.3,5.1 2.3,5.1 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Investigation focuses on cryogenic freezing system


An investigation into a liquid nitrogen leak at a poultry processing plant in Gainesville, Georgia, that killed six people is focusing on a cryogenic freezing system manufactured by Messer.

The US Chemical Safety and Hazard Investigation Board’s (CSB) work on the incident at the Foundation Food Group on 28 th January is ongoing, but the CSB has released some details in an update.

The incident at Foundation Food Group’s Gainesville Plant 4 occurred on Line 4, where chicken is processed, to include seasoning, cooking, freezing, and then packaging.

The system installed on Line 4 is a liquid nitrogen immersion-spiral freezer. The liquid nitrogen units were manufactured and installed by major industrial gases company Messer and are leased to the Foundation Food Group, according to CSB.

“CSB has confirmed that both the external and the interior elements of this system were manufactured by Messer,” CSB said in a statement.

“This includes the supply tanks outside, and the interior cryogenic freezing equipment on Line 4. Prior to the recent installation of this system, a different type of freezing equipment was used, which was ammonia-based. This equipment is still collocated on Line 4 adjacent to the cryogenic system and has not yet been removed.”

Liquid nitrogen was first used in Plant 4 in 2020 and some tools were found near an immersion freezer on Line 4, according to the CSB. The CSB understands that Line 4 was shut down on the morning of the incident “due to operational issues on the conveyor line”.

“We have since learned that unplanned maintenance was being conducted on Line 4,” the CSB statement said.

“The LN [liquid nitrogen] units were manufactured and installed by Messer and are leased to the Foundation Food Group. The plant had been experiencing unresolved operational issues on the chicken conveyor that appear to have resulted in the accidental release of liquid nitrogen in the flash freezing bath. Foundation Food Group maintenance personnel reported the computerised measuring system indicated a low liquid level in the immersion bath used to flash freeze the chicken products.”

The CSB continues to investigate the incident.

“Messer was notified the morning of Thursday, 28th January of several fatalities at Foundation Food Group (formerly Prime Pak Foods, Inc.) in Gainesville, GA,” Messer said in a statement to gasworld.

“Our hearts go out to the families of the deceased, and we express our sincere condolences. We understand that other employees and first responders were being treated at local area hospitals, and we hope for their speedy recovery. Messer has offered its full support to the Foundation Food Group team and is cooperating fully with the investigating authorities examining this tragedy.”

Source: gasworld

Six People Die After Liquid Nitrogen Leak at Georgia Poultry Plant

You Can Watch the interview of the officials in the video below


Five people were found dead at a Foundation Food Group plant in Gainesville, Ga., and a sixth person died at a hospital, the authorities said.
At least 6 people died and nine others were hospitalized after a liquid nitrogen leak at a Foundation Food Group poultry plant in Gainesville, Ga., on Thursday.CreditCredit…Scott Rogers/The Times, via Associated Press
By Richard Fausset and Michael Levenson
• Jan. 28, 2021
GAINESVILLE, Ga. — A line carrying liquid nitrogen ruptured at a poultry processing plant in Georgia on Thursday morning, killing six people and injuring 11 others in an accident that union officials said raised serious questions about safety protocols at the plant.
Firefighters responded at 10:12 a.m. to a report of burns at the Foundation Food Group plant in Gainesville, Ga., about 55 miles northeast of Atlanta, Zach Brackett, a Hall County fire division chief, said at a news conference.
Once there, the firefighters found a “large contingent of employees that had evacuated, along with multiple victims that were in that crowd that were also experiencing medical emergencies around the facility,” Chief Brackett said.

Five people were found dead inside the plant, and a sixth person died after being taken to the Northeast Georgia Medical Center in Gainesville, according to Beth Downs, a medical center spokeswoman. The authorities did not release the victims’ names. Mexican government officials said that two of those killed were Mexican citizens.

“Preliminary indications are that a nitrogen line ruptured inside the facility,” said Nicholas Ancrum, the vice president of human resources at the Foundation Food Group.Credit…Scott Rogers/The Times, via Associated Press
Three others were in critical condition, and five, including one firefighter, were in fair condition, Ms. Downs said. Another three who had been taken to the hospital were released, she added. All those who were hospitalized had respiratory problems.
An additional 130 people were taken by school buses to a church for evaluation by medical personnel, Chief Brackett said.
Nicholas Ancrum, the vice president for human resources at the Foundation Food Group, said that a “tragic accident” had occurred at the plant, which had been called the Prime Pak Foods plant until it was taken over this month by the Foundation Food Group, a poultry company with headquarters in Gainesville.

“Preliminary indications are that a nitrogen line ruptured inside the facility,” Mr. Ancrum said at a news conference. “Those lost today include maintenance, supervisory and management team members. Every team member is equally important to us, and our hearts go out to their families and communities who have suffered such a devastating loss.”

Stuart Appelbaum, the president of the Retail, Wholesale and Department Store Union, which represents more than 15,000 poultry workers at facilities across the southern United States, called the deadly accident “a complete and utter tragedy.”
“Had simple safety protocols been followed today, workers’ lives wouldn’t have been on the line,” he said. “The egregious lack of standards at nonunion facilities like the one in Gainesville cost essential workers their lives today.”
The plant ran afoul of the Occupational Safety and Health Administration several times in the past few years. In 2015, it was fined more than $100,000 for about a dozen safety violations, according to records. The following year, it was fined more than $40,000 for violations.
In 2017, two employees underwent amputations, including one of two fingers after his left hand got caught in machinery that he was cleaning, according to records. The other worker lost four fingers on his right hand after it got stuck in a food mixer. In 2019, the plant was fined $3,750, records said.
Mr. Ancrum said that Foundation Food had immediately evacuated 130 employees after the leak and had taken steps to protect others and the surrounding area from exposure.
“Foundation Food Group takes workplace safety very seriously and works constantly to adopt and implement the most effective safety programs available to the industry,” Mr. Ancrum said. “Until this investigation is completed, we cannot say with confidence precisely how this accident occurred.”
Liquid nitrogen is often used in poultry plants to chill or freeze chicken after it has been gutted and processed, said Edgar Fields, the Southeast Council president of the Retail, Wholesale and Department Store Union.

But when it evaporates, the resulting nitrogen gas can fill a much larger space and can rapidly displace air and the oxygen essential to life, leading to an asphyxiation hazard, said Rick L. Danheiser, a professor of chemistry at the Massachusetts Institute of Technology. Because of its low temperature, liquid nitrogen also can cause cryogenic burns on contact, he said.
In poultry and meat plants, the seals on pressurized liquid nitrogen lines must be checked routinely for leaks, union officials said.
If it turns out that the plant was cutting corners to save costs, the company should be prosecuted, said Mark Lauritsen, the director of food processing, packing and manufacturing at the United Food and Commercial Workers International Union, which represents about 250,000 meat and poultry workers.
“This should never ever, ever happen,” given how dangerous the chemical is, Mr. Lauritsen said.
The nitrogen leak was one of several deadly industrial accidents in recent years.
In April 2010, 11 people died when an explosion ripped through the Deepwater Horizon drilling rig in the Gulf of Mexico, unleashing one of the worst offshore oil spills in the United States. In May 2020, 11 people in India died and hundreds were sickened after a tank containing styrene, a liquid used in making plastics, leaked, officials said.
Other recent industrial accidents have sent thousands fleeing from their homes.
In November 2019, 30,000 people in southeast Texas were evacuated after a pair of explosions rocked the Texas Petroleum Chemical plant. And in 2017, 21 emergency workers in Texas were treated for smoke exposure after Hurricane Harvey caused fires at the Arkema chemical plant.
The deadly accident on Thursday morning was silent, at least to one employee, Maria Bonilla, 60.
Ms. Bonilla, a Salvadoran immigrant who does not speak English, was working in the marinating department of the sprawling plant. She did not hear an explosion, or a crash or screams.

“We didn’t hear anything,” she said.
She knew something was wrong only when a supervisor came running in to her department saying that there had been an accident and that everyone had to get out.
She said she and other workers had evacuated and stood outside for more than an hour, terrified.
Ms. Bonilla, who has lived in the United States for 30 years, said that she had worked in the plant for eight years.
On Thursday evening, Ms. Bonilla was the sole worker in the parking lot, sitting in the driver’s seat of her white Chevy sedan. Her son Richie Alexis Santos, 29, had come to make sure she was OK.
“Honestly, I feel that she got blessed, she’s lucky,” he said. “Because nitrogen, you can’t see it. It’s a good thing it didn’t spread around the building or we probably wouldn’t be here right now.”
He added, “Definitely it’ll be more pressure on the companies to have a safer place to work at.”
The plant is one of many in Georgia, a top chicken-producing state, and in Gainesville, which has been called the poultry capital of the world because of its many processing plants.
The industry nationwide is known for paying workers low wages to work in freezing-cold plants, where they often stand shoulder to shoulder processing birds at a rapid clip, according to the Retail, Wholesale and Department Store Union.
Workers can encounter dangerous equipment, slippery floors and hazardous refrigerants like ammonia, according to the Occupational Safety and Health Administration.

Thousands of workers have also tested positive for the coronavirus, which has swept through meat- and chicken-processing plants, many of which stayed open last year when other businesses closed.
Mr. Fields said the plants in Gainesville employ many immigrants from Asia, South America and Africa.
On Thursday evening, the Foundation Food plant was eerily quiet. Part of the parking lot was roped off with police tape. Through a doorway it was possible to glimpse an empty room lined with blue smocks for workers, hanging on a rack. Through a window could be seen an empty break room with a few lunch sacks, backpacks and bottles on a folding table.
Gov. Brian Kemp of Georgia said in a statement that “our hearts are broken after hearing about the tragedy that took place at Prime Pak Foods in Gainesville this morning.”
He said he and his family had asked all Georgians “to join us in praying for the families facing a terrible loss and the other employees who are receiving medical care.”
Richard Fausset reported from Gainesville, Ga., and Michael Levenson from New Jersey. Miriam Jordan contributed reporting from Los Angeles, and Azi Paybarah from New York. Sheelagh McNeill contributed research from New York

Richard Fausset is a correspondent based in Atlanta. He mainly writes about the American South, focusing on politics, culture, race, poverty and criminal justice. He previously worked at the Los Angeles Times, including as a foreign correspondent in Mexico City.

Source: The New York times

 

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