Read 10.2.5.pdf text version

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Sulphuric Acid: A Challenge for Materials and Sealing Systems for Centrifugal Pumps

Dr. Juergen Weinerth Friatec AG - Division Rheinhuette Pumpen Rheingaustrasse 96 ­ 98 65203 Wiesbaden, Germany

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Contents

Overview Materials Pump Design & Sealing Systems

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Overview

Sulphuric Acid

Pump Design

Vertical Horizontal

Materials

Metal Plastic Ceramic

Sealing Systems

Gland Packing Mechanical Seal Mag Drives Hydrodynamic Seal

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Contents

Overview Materials Pump Design & Sealing Systems

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Overview Materials

[°C]

300

200

Temperature

Special metal alloys like: SX Saramet 35 Lewmet 1.4136S

Siguss

PTFE

Fe sp rretic allo ecial & ys me ta

l i ne Boiling

nur bis 180°C

100

50

Plastic

PP, Pe1000, PVDF, ETFE

20

1. 44 0

50

0

Concentration H2SO4 in %

l

08 44 1.

8

100

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Corrosion of Plastic Materials in H2SO4 Materials

350 325

Boiling curve Sulphuric acid

Boiling curve H2SO4

300 275 250 225 Temperature [°C] 200 175 150 125 100 75 50 25 0

Corrosion curve PP Corrosion curve HD-PE 1000 Corrosion curve PVDF Corrosion curve PTFE / PFA Corrosion curve ETFE

0

10

20

30

40

50

Concentration [% ]

60

70

80

90

100

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Corrosion and Rotation Speed Materials

100

25° C

Corrosion rate in mm per year mm/a

10

4 m/s

1

2 m/s 0 m/s

0,1

0,01 0 10 20 30 40 50 60 70 80 90 100

Concentration in % H2SO4

Corrosion rate of SS 316 for different concentrations of H2SO4 at different rotation speed.

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Contents

Overview Materials Pump Design & Sealing Systems

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Overview Sealing Systems

[°C]

300

200

Temperature

Vertical or Hydrodynamic

Mag-Drive

Boiling l i ne

100

Mechanical Seal

50 20

0

Concentration H2SO4 in %

50

100

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Vertical "Strong" Acid Circulating Pumps Pump Design

Photo: Lewis PumpsTM

Photo: Ensival-Moret

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Horizontal "Weak" Acid Plastic Pumps Pump Design

Solid plastic

Cast iron armour

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Plastic Impeller Design Pump Design

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Massive Plastic Casing Pump Design

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Horizontal "Weak" Acid Plastic Pumps Pump Design

10% H2SO4

with Ni, Cu & Co powder

Material: PE T: 70°C Q: 2500 m³/h H: 29 m Motor: 280 kW

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Horizontal "Weak" Acid Plastic Pumps Pump Design

10% H2SO4

with Ni, Cu & Co powder

Material: PE T: 70°C Q: 2500 m³/h H: 29 m Motor: 280 kW

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Ceramic Pumps Pump Design

Cast iron armour Concret filling

Silicate ceramic FrikorundTM Mixed acids at any concentration with solids (e.g. TiO2)

Massive ceramic

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Horizontal Magnetic Driven Pumps Pump Sealing Systems

Spacer can

Critical Components: -Spacer Can -Inner Rotor Materials: -SX -Hastelloy C4 -1.4539 (904L)

Inner rotor

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Hydrodynamic Shaft Seal Pump Sealing Systems & Unique Material Silicon Cast Iron (15% Si)

Concret filling Cast iron armour

Hydrodynamic shaft seal with up to 3 expellers Standstill seal: grease, pneumatic, packing

Silicon cast iron

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Corrosion Rate per Year Silicon Cast Iron (15% Silicon)

340 320

300

280 260 240 220 180 160 140 120 80 60 40 20

Source: Rheinhuette technical information 1

200 T (°C)

100

< 0,4 mm/a < 0,02 mm/a

< 0,1 mm/a

0

10

20

30

40

50

% H2SO4

60

70

80

90

100

Siguss is resistant against corrosion of sulphuric acid at all concentrations and temperatures

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Pumps in a Weak Acid Evaporation Plant Pump Sealing Systems & Unique Material Silicon Cast Iron (15% Si)

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Titanium Dioxide Production ­ Sulfate Process A Special Pump for a Special Application German History

Ilmenit Ore is digested in sulphuric acid Final Product: white TiO2 pigments

Sulfate Process industrially since 1916

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Titanium Dioxide Production ­ Sulfate Process A Special Pump for a Special Application German History

Development of Production Processes for Titanium Dioxide at Kronos Titan

Prohibition of Ocean Dumping

Chloride Process

Sulfate Process without spend acid regeneration

Sulfate Process with spend acid regeneration

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Weak Acid Dumping at the North Sea A Special Pump for a Special Application German History

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Acid Circulating Pump with an "Inducer" Impeller A Special Pump for a Special Application German History

Cast iron armour Concret filling

Hydrodynamic shaft seal with up to 3 expellers Pneumatic standstill seal

Silicon cast iron

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Acid Circulating Pump with an "Inducer" Impeller A Special Pump for a Special Application German History

30 - 80% H2SO4

with metal sulfate chrystals

T: 50 - 190°C Q: 1500 m³/h H: 3 m DN 500

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Acid Circulating Pump with an "Inducer" Impeller A Special Pump for a Special Application German History

30 - 80% H2SO4

with metal sulfate chrystals

T: 50 - 190°C Q: 1500 m³/h H: 3 m DN 500

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Gas Lubricated Shaft Seal for Hot Sulphuric Acid New Sealing System Development

Cardridge seal

Sulphuric Acid:

A Challenge for Materials and Sealing Systems for Centrifugal Pumps

AIChE Clearwater Convention 2010; Dr. Jürgen Weinerth

Information

Title

28 pages

Find more like this

Report File (DMCA)

Our content is added by our users. We aim to remove reported files within 1 working day. Please use this link to notify us:

Report this file as copyright or inappropriate

715763


You might also be interested in

BETA
Title