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Pulp & Paper

Pulp & Paper

Pulp & Paper

Production of products involved in the pulp and paper industry occurs all over the world and includes familiar segments such as tissue‚ newsprint‚ printing papers‚ pulp and packaging. This is a historically competitive market with new plant installations occurring primarily in Eastern economies with Western plants retooling and managing to stay competitive with global market pricing. RelaDyne Reliability Services recognizes this market dynamic supporting plants with a broad aftermarket service network and direct sales force.

There are many different fluid handling applications within the Pulp and Paper market with almost all of the RelaDyne Reliability Services brands and pump technologies supporting process operations within one of the identified segments. Operators and Engineers trust RelaDyne Reliability Services to balance the requirements of cost and technology in such applications as Powerhouse‚ Coating Kitchen‚ On Machine Coating or Pre-Pulp station.

RelaDyne Reliability Services provides support to many of the Pulp and Paper segments with pumps and systems capable of handling liquids over a range of viscosities‚ pressures‚ flows and composition. Our featured applications include:

  • Impregnation:Following the chipping and pre-steaming processes‚ black and white liquor are used within the Kraft style process to impregnate. The cooking liquors consist of a variety of substances including white liquor‚ water‚ steam and diluted black liquor. A good impregnation is important to get a homogenous cook and low rejects.

    CIRCOR three and two screw pumps are used to move the black and white liquor within this process.

    Series Max Flow Rate
    GPM
    Max Flow Rate
    L/min
    Max Discharge
    Pressure PSIG
    Max Discharge
    Pressure Bar
    Three Screw Pumps 30 – 1‚100 112 – 4‚164 560 – 4‚500 40 – 310
    Two Screw Pumps 40 – 6‚000 150 – 22‚700 154 – 1‚500 11 – 107
  • Powerhouse:The pulp and paper powerhouse includes the prime mover and the auxiliary components. The prime mover is responsible for generating the electricity for the plant; the auxiliary components include lubrication systems as well as the fuel forwarding or transfer to the prime mover. In a pulp paper plant‚ a variety of liquids are pumped to the primer mover for combustion. They include traditional bio fuels such as black liquor and conventional wood fuels‚ as well as traditional combustion fuels used in a power plant such as Fuel Oil #6 or #4. Certainly‚ bio fuels are more common because of the source of supply and synergy with downstream processes. In additional traditional fossil fuels are also used to generate power such as coal.

    CIRCOR products found within the powerhouse include three screw (rotating equipment lubrication‚ transfer‚ fuel forwarding) and two screw (transfer‚ fuel forwarding) and centrifugal (lubrication).

    Series Max Flow Rate
    GPM
    Max Flow Rate
    L/min
    Max Discharge
    Pressure PSIG
    Max Discharge
    Pressure Bar
    Three Screw Pumps 30 – 1‚100 112 – 4‚164 560 – 4‚500 40 – 310
    Two Screw Pumps 40 – 6‚000 150 – 22‚700 154 – 1‚500 11 – 107
    Series Max Flow Rate Max Delivered Head Max Pressure Max Fluid Temperature
    Centrifugal Pumps 80 – 2‚300 m3/h 55 – 250m 16 or 25 bar 120 – 400C
  • Cooking:CIRCOR branded Warren thick stock pumps are the industry standard. These high density pumps are extremely rugged and reliable‚ and are designed to develop high pressure with little or no vibration. Conservative engineering in critical areas assures long-term reliability even in the demanding operation of pumping high consistency stocks.

    Each installation is a case study of energy savings and / or operational improvements. Some examples include:

    • Routinely achieves consistencies of 14 – 16 percent
    • Increased output through a bleach plant by as much as one-third or more‚ without increasing baseline production costs
    • Increased chemical consumption efficiency in the bleaching tower‚ reducing chemical costs by as much as $1 million per year
    • Reduced the amount of steam required to heat the stock in the bleaching process‚ saving as much as $1.3 million per year per stage in energy costs

    The very successful concept of twin-intermeshing pump screws is continued in the 2601 series. The design changes that have been incorporated are directed specifically at making on-site repairs by mill personnel easier‚ faster and more economical.

    Series Flow Range (Volume of
    Stock moved per day)
    Maximum Pressure on
    Discharge (psi)
    Warren 2601/Two Screw Up to 2000 tons per day 240 psi
  • Recovery Process:There are variety of pumps used in the recovery process of a pulp and paper plant. The type of pump recommended depends on the recovery step and the solids content of the product. Liquids moved in this section of the plant include black liquor‚ tall oil‚ white liquor and green liquor.

    In the recovery process‚ black liquor is evaporated multiple times to increase the solids content. In the first evaporation stage‚ rosin soap rises to the surface and is skimmed off. This soap is further refined into tall oil. In the second evaporation stage‚ evaporation occurs to raise the solids content and is then returned to the recovery boiler where it is burned. Progressing cavity pumps are commonly used in this section because of the solids content and abrasiveness of the liquid pumped.

    Tall oil is the processed rosin soap from black liquor.

  • Coating Kitchen:In the coating kitchen‚ pigment is combined with a media or binding agent (such as casein or starch) and applied to the paper. Each coating will have its own recipe and the process is controlled through automated controls. The coating kitchen is also responsible for the preparation of the starch solution.

    CIRCOR pumps are used to support the transfer and manufacture of the binding agent. These typically are progressing cavity pumps and are chosen because of their sheer sensitivity and accuracy.

    Series Max Flow Rate
    GPM
    Max Flow Rate
    L/min
    Max Discharge
    Pressure PSIG
    Max Discharge
    Pressure Bar
    Allweiler ADP/ADBP 3 10 169 12
    Allweiler ANP/ANBP 11 42 226 16
    Allweiler AFP 12 47 85 6
    Allweiler AE.N-RG 132 500 282 20
    Allweiler SEFBP 177 670 141 10
    Allweiler AEB.H.ZE 198 750 338 24
    Allweiler AEB.H-RG 449 1‚700 508 36
    Allweiler SETP 621 2‚350 141 10
    Allweiler AEB.E-IE 766 2‚900 226 16
    Allweiler AE.H-ID 766 2‚900 353 25
    Allweiler TecFlow 819 3‚100 226 16
    Allweiler AE.E-ID 1‚981 7‚500 226 16
    Allweiler AE.N-ID 1‚281 4‚850 353 25
  • Calendaring:The calendar process is used to make the paper appear surface extra smooth and glossy. Super rolls apply high pressure and heat to the manufactured paper. The pressure and heat of the calendar presses the paper into its final stage for packing.

    The high pressure calendars are supported with a CIRCOR high pressure pump such as the CIG. The CIG is capable of supporting pressures up to 5‚000 psi.

    Also‚ it is common to have the calendar process supported with heated synthetic oil. This heated oil is typically pumped with a hot oil pump‚ such as the Allweiler branded AllHeat.

    Series Max Flow Rate Max Delivered Heat Max Pressure Max Fluid
    Temperature
    Rated output
    according to
    ALLHeat-CIWH 105 m3/h 58m 25 bar 400C DIN EN 22858/ISO 2858
    ALLHeat-CBWH 240 m3/h 63m 25 bar 400C DIN EN 22858/ISO 2858
    ALLHeat-CTWH 1‚450 m3/h 100m 25 bar 400C DIN EN 22858/ISO 2858
  • Rotating Equipment Lubrication:If it rotates in a pulp and paper plant‚ then it needs lubrication. Examples of rotating equipment within a pulp and paper plant include turbo expanders in the recovery process and turbines within the powerhouse.

    CIRCOR and the brands of Imo and Allweiler provide industry leading technology for rotating equipment such as compressors‚ turbines and diesel engines. Three screw pumps are ideal for pumping clean‚ lubricating fluids. Fluid film thickness and operating clearance in a three screw pump is typically smaller than that of a two screw design‚ giving higher efficiencies and higher pressure capabilities than a two screw pump providing viscosity is adequate and fluid is clean enough to avoid disruptions to the internal fluid film.

    Frequently‚ the pump and motor unit is submerged in the lubrication oil tank. When process requirements allow this design‚ the life of the product is enhanced.

    Three-Screw:

    Series Max Flow Rate
    GPM
    Max Flow Rate
    L/Min
    Max Discharge
    Pressure PSIG
    Max Discharge
    Pressure Bar
    Comments
    ACE 44 166 150 10
    3E 100 279 150 10
    3G 210 795 250 17
    ACG/UCG 315 1‚180 225 16
    Alllub RUV 343 1‚300 224 16 Vertical installation
    3D 400 1‚514 500 34
    6D 400 1‚514 1‚500 103
    3L 400 1‚514 150 10
    SM 579 2‚170 1‚692 120
    SN 1‚000 3‚800 500 34

    Centrifugal:

    Series Max Flow Rate Max Delivered Heat Max Pressure Max Fluid Temperature Rated output
    according to
    NSSV 550 m3/h 150m 16 bar 120C DIN EN 733

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