Redefining industrial processes for the digital worldBreadth of expertise in industrial processes to drive safety, sustainability and efficiency

CASE IN BRIEF

Customer: Ahlstrom-Munksjö
Project location: Sweden
Year completed: 2019.

Technical data:

Plant type: Batch cooking plant

Project description

Instalment of a fifth digestor to increase the capacity of the cooking plant in Billingsfors site.

Citec's a Cyient Company scope

Citec, a Cyient Company was involved in several key areas of the modernization work on the batch cooking plant:
    • Project Management
    • Basic and detail engineering for Piping, Process as well as Layout and piping
    • Stress and strength calculation
    • Purchase support
    • Installation management
    • Risk analysis

Keywords : pulp, paper, production efficiency

CASE IN BRIEF

Customer: Energigjenvinningsetaten
Project location: Norway
Year completed: 2016.

Project description

The objective of this feasibility study was to investigate the opportunities, challenges, risks and costs for the retrofit implementation of a full-scale carbon capture plant. Klemetsrudanlegget AS made a waste-to-energy (WtE) plant with CO2 emissions exceeding 300 000 tons per year available for the study. The feasibility study was based on the most mature and commercial technologies available for carbon capture and storage based on Egergigjenvinningsetaten’s (EGE) set criteria concerning the energy recovery plant at Klemetsrud: current operating data and operating conditions, existing and expected regulatory framework for land and concessions, in addition to data from the parallel technology studies for carbon capture and the transport and interim storage study.

Citec, a Cyient Company scope

The feasibility study contained also sub-studies performed and reported by four other technology providers: Aker solutions, GE Alstom, MTR and Multiconsult. Citec a Cyient Company, was responsible for managing content, scope limits, needed inputs, communication, total project plan, time schedule and more. We ensured that all sub-studies were using the same structure in their reports. Citec, a Cyient Company, provided recommendations regarding the continuation and direction of the sub-studies work. In addition to Citec´s total setup, the four sub-studies were evaluated, assessed, and compiled into one feasibility report enabling solid decision grounds for the investment. To evaluate and steer the work by the sub-studies the existing WtE plant was modelled by Citec, a Cyient company, using thermodynamic calculation software (ThermoflowTM).

CASE IN BRIEF

Customer: FLSmidth Pvt. Ltd
Project location: Bangladesh
Year completed: 2017

Technical data:

Capacity of vertical roller mill (VRM): 640tph

Cement fineness: 3800 Blaine

Project description

The Vertical roller mill (VRM) at the Shah cement plant in Bangladesh, with a capacity of up to 640tph and 3800 Blaine, will be the largest cement VRM in the world to be installed at a cement plant, in terms of mechanical dimensions and operating capacity.

Citec, a Cyient Company scope

Design, development, and detail engineering including as built drawings for challenging structures like cement mill feed house with heavy hoppers with total capacity 5000MT, dynamic foundation for induced draft fan, cement mill building with heavy crane of 77Mtons.

CASE IN BRIEF

Customer: Södra Cell AB, Sweden
Project location: Sweden

Technical data: 

• Diameter of cutting board: 3400 mm
• Thickness of cutting board: 210 mm
• Speed of cutting board: 246 rpm
• Number of knives: 12 pc.
• Max. diameter of log: 800 mm
• Chip length: 16-35 mm
• Capacity based on chip length: 800-1300 m3 chip/hour.
• Inertia moment J: 23 600 kgm2
• Heaviest weight on the lift rotor (axle, cutting board and storage): 18 00 kg
• Net weight excluding motor and gear system: 31 000kg. 

Project description

A chain conveyor is used for proper feeding of the wood into the chipper. It is considerably cheaper when compared to roller conveyor. It also requires less maintenance and is safer to operate. The conveyor has seven chains of which the four feed chains are driven by a hydraulic engine of type CA 50 Hägglunds Compact 30kW. The three side chains are driven by a hydraulic motor of type CA 50 Hägglunds Compact 22kW. A height limiter is mounted to avoid jams caused by logs that are too large being fed into the chipper. In case of a jam, the three side chains will first be driven on reverse to loosen the logs and at the same time, the log lifter located on the side of the chain conveyor will be activated.

A high performance horizontally fed mill with a cutting aperture of 800 mm.

Main components of the machine:

• Cutting board with axle and storage

• Forward and back frames

• Cover for the cutting board.

• Behind the cutter is a large chip pocket, which equalizes the flow to a metering screw carrying chips on through several screw conveyors to the digester house.

Citec, a Cyient Company scope

Citec, a Cyient Company scope consisted of design engineering of a new wood room line. Citec created a layout based on the customer’s requirements for capacity and physical locations and complete calculations for the chain conveyor, cutter, and chip pocket together with the manufacturing drawings. Citec also calculated and created the following chip pocket as well as designed the metering screw and the included screw conveyor.

CASE IN BRIEF

Customer: Metso Fiber and GL&V
Project location: Japan

Year Completed: 2007

Project description

When Metso Fiber and GL&V received an order from the distinguished Japanese paper manufacturer Hokuetsu Paper Mills Ltd for a complete screen room, bleach plant and post-screening facilities for one of their four paper mills, the flagship Niigata Mill, Citec, a Cyient company, was given the responsibility of conducting all of the project planning and construction of the pipe systems.

Citec, a Cyient Company scope

The scope of work included project planning and construction of the pipe system and the construction were carried out with PDMS and AutoCAD.

Keywords: paper, cellulose

CASE IN BRIEF

Customer: Ahlstrom-Munksjö
Project location: Sweden
Year completed: 2019.

Technical data:

Plant type: Recovery boiler

Project description

Engineering consultancy services for a customer in Billingsfors site.

Citec, a Cyient Company scope

Citec, a Cyient Company, provided expertise and services for:

• Project Management
• 3D coordination
• Feed water and utility piping
• Cable tray routing
• Utility piping design
• Stress and strength calculation
• Installation management
• Risk analysis

Keywords: pulp, paper, production efficiency, engineering consultancy, boiler

CASE IN BRIEF

Customer: Stora Enso AB, Skoghall, Sweden
Project location: Sweden

Project description

A rebuild of KM7-8 milling room and KM8 steam pipeline including pipe design and mechanical engineering.

Citec, a Cyient Company scope

Citec, a Cyient company, scope included project management of mechanical design and pipe design in different projects related to the board machine KM7 and KM8, as well as detail planning for below parts. Design drawings as a basis for the purchase and construction as well as installation drawings, isometrics, and installation supervision. The drawings were made in AutoCAD and PiCAD.

Sleeve handling equipment, incl sleeve bearing, cutting and transporting system for 2 roller curving machines:

• Bale wiring equipment for the bale mass line
• Rebuild of rewinding machine
• Installation of dust removal equipment
• Installation of proving frames
• Construction of roll mill incl cylinder bearing, washer, lifting table
• Various construction work on and around board machine