Kvaerner Pulping, Inc.
International Paper Company
Natchez, MS

Turnkey installation of a Single Stage Causticizer coupled with a Pressure Disk Filter for white liquor.  Project required reconfiguration of existing tank farm including conversion of white liquor clarifiers to green liquor service.  NHWL responsibilities included all detail design, specification, and purchase of instrumentation and equipment; turnkey construction and assisting in start-up of the facility.
 

Kvaerner Pulping, Inc.
International Paper Company
Pineville, Louisiana

Turnkey installation of a Pressure Disk Filter for white liquor.  Project required reconfiguration of existing tank farm and tie-ins to existing piping and electrical systems.  A new DCS system was part of the project.  NHWL responsibilities included all detail design for all disciplines. Construction of civil, structural, and mechanical systems; and construction assistance for electrical and instrumentation systems
 

Kvaerner Pulping, Inc.
Georgia-Pacific Corporation
Nekoosa, Wisconsin

Project consisted of entire new alkali plant complete with lime kiln.  Main process equipment included storage tank farm, pressure disk filter, cassette green liquor filters, two vacuum drum filters, slaker, and lime kiln.  NHWL's responsibilities included detail design of all engineering disciplines, specification of instrumentation and equipment, and assisting with construction
management.
 

Kvaerner Pulping, Inc.
Western Pulp Limited Partnership
Squamish, British Columbia, Canada

Project consisted of the addition of an additional Bleaching Stage and Diffuser Mid-Stream in the existing Bleach Plant.  NHWL responsibilities included overall 3-D modeling, piping design, and electrical and instrumentation design.  NHWL also provided full-time construction site representatives for piping and E&I.
 

Weyerhaeuser Paper Company
Columbus, MS

Conversion of two existing vessel digesters to 2 Kamyrs Lo-Solids Cooking.  NHWL's
responsibilities included providing detail design for construction disciplines, preparation of instrument and equipment specifications for purchasing, preparation of contractors bid documents, and construction management.
 

Champion International
Pensacola, FL

Installation of vacuum drum filter as a Dregs Filter.  Filter is housed in a new standalone building. NHWL's responsibilities included all detail design for construction disciplines, preparation of specifications and purchase orders for instrumentation and equipment, preparation of contractors bid documents, and site supervision for shutdown work.
 

Champion International
Pensacola, FL

Installation of two Ahlstrom vacuum drum filters and lime mud dryer system with electrostatic precipitator.  Project includes construction of new filter building, new precipitator support
structure modifying existing filter building, and modifying equipment at discharge end of kiln. Responsibilities include civil, structural, mechanical, electrical and instrumentation.
 

Gotaverken Energy Systems
Weyerhaeuser Paper Company
Columbus, MS

Project is a design/build project, with the major equipment supplier acting as prime, to install a Gotaverken Energy Systems pressure disc white liquor filter in an existing facility.  NHWL responsibilities are the design, specification, purchase, and installation of auxiliary equipment, piping and valves, structural steel and concrete, electrical systems, and instrumentation and control system components.
 

Goslin-Birmingham
James River Corporation, Berlin, New Hampshire

Installation of double effect black liquor concentrator system.  Project included preparing general arrangements and structural design of platforms and piping systems.  Thermal stress analysis was performed for hot liquor piping.
 

Goslin-Birmingham
Glatfelter Corporation, Spring Grove, PA

Installation of double effect black liquor concentrator system.  Project responsibilities include ddesign of liquor and steam piping systems with thermal analysis performed on select lines. Structural design provided for access platforms at flash tanks, surface condenser, and access to
spectacle blinds along vapor piping.
 

Goslin-Birmingham
Interstate Paper, Riceboro, GA

Installation of NCG collection and stripping system with NCG gases combusted in both the lime kiln and power boiler.  Project responsibilities included piping and structural design.  Project included 30,000 ft. of piping throughout mill, dealing with sizing ranging from 46" to 1"
diameter.
 

Engelhard Corporation
Attapulgus, GA

Installation of hydraulic operated plate and frame filter press.  The press is used to dewater
process sludge ponds and is housed in an enclosed steel frame building elevated so that a haul truck can be parked below the filter to receive solids.  Support equipment and tankage is located in a curbed ground floor area adjacent to the building.  Responsibilities included civil, structural, mechanical, instrument, and electrical design.
 

Engelhard Corporation
Attapulgus, GA

Installation of three 125 hp nitrate centrifuges and one clarifier for silicate service.  Centrifuges were installed on concrete structure approximately 24 feet off grade; and an intermediate steel level was used for centrifuge utilities and ground level used to house the polymer feed systems.  Design responsibilities included structural, mechanical, instrument, and electrical.
 

Georgia-Pacific Corporation
Cedar Springs, GA

NHWL has completed a series of plant projects including:

• upgrade of river outfall valve stations
• replacement/redesign of stock piping to accept new stock switching valves
• replacement of causticizers
• replacement of log jackladders
• modification of boiler feed water piping
• design of containment for railcar loading areas
• design of access platforms
• modification of chip chutes

Floridin Company
Quincy, FL

Project consisted of the addition of a new granular circuit to the existing milling and screening facility.  Design included modifications required to retrofit three floors and install screening equipment, bucket elevators, and fugitive dust collection.  One hundred (100) ton finished product bin was installed over an existing track to allow both truck and rail loadout.  Bulk loadout station for rail included impact scale and retractable loadout spout.  Bulk loadout system for truck included elevated belt conveyor, flow-thru dust collector, and retractable loadout spout.
 

Floridin Company
Quincy, FL

Project consists of modifications to existing fine grind product packaging facility to increase storage, increase packaging efficiency and capacity, and decrease fugitive dust sources.  Existing feel elevator was raised and two (2) additional 1500 cf bins were added.  Existing valve packers were relocated and modifications were made to relocate two (2) existing impeller packers and one (1) force flow packer.  200,000 cfm fugitive collector was added to control dust sources.  Also needed were airslides, packaging conveyors, bag flatteners, and bulk bagging system.
 

Packaging Corporation of America
Valdosta, GA

Installation of a soda ash railcar unloading, slurry and slurry transport system, and slurry storage system.  Project included pneumatic withdrawal of railcar into slurry makedown vessel from which the slurry is pumped to a tank retrofitted to serve as slurry storage.  Liquor is produced through maintaining control of the crystal bed in the storage tank and drawing clear liquid off above the interface.
 

Oil-Dri Corporation
Blue Mountain, MS

Project involved the addition of a granular circuit to the existing screening and milling facility.  Scope included production of equipment arrangement drawings, foundation and structural steel design of the support systems for 200 ton storage silos, conveying systems, screen supports, and fugitive dust collector.  Modifications required were done without disrupting existing production operations.
 

Oil-Dri Corporation
Ochlocknee, GA

Project consisted of sizing and detail design of dust collection system for bulk loading facility.  Pick-up points included three (3) belt conveyors, two (2) dedusters, two (2) bins, an elevator and two (2) loading spouts.  The system manifold collected approximately 14,000 cfm which was routed to a new dust collector and fan located on the loading spout structure.  Sizing of manifold and branches included pressure drop calculations for fan sizing.
 

U.S. Silica
Columbia, SC

Project consisted of the addition of a truck and rail loadout system to the existing loadout facility. Design included modifications to existing loadout bins and structure, and the addition of a freestanding articulating airslide conveyor system with retractable loadout spout for rail and
truck loadout.  Truck loadout enclosure, control room, and access ramp system for truck loadout were also included.