NORAM Engineering and Constructors Ltd.   Jobs (Visit website)
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Company Description:

NORAM Engineering offers a wide range of services in DNCG/HVLC Gas Systems: Audits of existing operations, including troubleshooting and debottlenecking Studies to evaluate and recommend system improvements Process Safety Management (PSM) / HAZOP analysis Operator training Design and supply of state-of-the-art technologyNoram systems focus on the following: Safety and reliability Innovative and effective designs Low capital and maintenance costsDNCG systems are designed to eliminate the explosion hazard through addition of sufficient air to ensure that the collected gases are below their Lower Explosion Limit (LEL). However, ingress of tramp air is minimized in order to reduce system size and open up more options for treatment of the collected gases. NORAM provides tailored systems that meet the needs of individual mills based on the mill layout, existing equipment and operating conditions. Three unique DNCG sources requiring special consideration are chip bins, brown stock washers and heavy black liquor tanks. Chip Bin Gases require additional conditioning compared to typical DNCG sources. Unsafe, high TRS and turpentine concentrations can sometimes be present. The conditioning of the chip bin gases must take into account both TRS and turpentine accumulations due to the instabilities of presteaming and upsets in level control within the bin. Chip bin gas collection is the most hazardous of all the sources within a mill and NORAM engineers know what is necessary to ensure safe collection and disposal. Brown Stock Washers are typically the largest volumetric source of DNCG, particularly if the hoods are not properly enclosed and air ingress not controlled. NORAM will work with mills to best reduce overall flow without adversely affecting operation. For example, changing the air doctors from outside air to hood air, and efficiently tying the filtrate tank vents into the hood are two effective measures that will reduce the overall airflow. Heavy black liquor tanks are generally operated hot and the gases that are vented contain substantial amounts of water vapor. This hot, wet stream would require a large diameter gas collection pipe and often some form of condensate handling system. Based on experience, NORAM engineers have found that installation of a condenser is often justified. Heavy black liquor tanks can also often accumulate high TRS concentrations during shutdown periods; thus, appropriate start-up procedures are needed for optimal safety.




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