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Also see Advanced Hot Gas Filter Development Reports

Advanced Hot Gas Filter Development.
For Period September 29, 1994 – September 30, 1998

McDermott Technology, Inc.

In this pdf format, this document has 98 pages and is 1.93 MB.

Table of Contents

Executive Summary

2

1.0

Introduction

4

2.0

Background Information

5

3.0

Program Objectives

7

4.0

Fabrication Approach

8

4.1

Raw Materials

8

4.1.1

Continuous Fiber

8

4.1.1.1

Fiber Coating

10

4.1.2

Chopped Fiber

10

4.1.3

Binders

10

4.1.3.1

Phosphoric Acid

10

4.1.3.2

Boehmire

11

4.1.3.3

Thermal Bonded

11

4.2

Vacuum Winding Process

11

4.3

Bonding

12

4.4

Heat Treating

13

4.5

Test Methods

13

4.5.1

Permeability

13

4.5.2

C-ring Strength

13

4.5.3

Microstructure

14

5.0

Open-End Tube Fabrication and Testing

15

5.1

Vacuum Winding

15

5.2

Permeability

15

5.3

C-Ring Strength

15

5.4

Conclusion and Recommendations

16

6.0

Sub-Scale Elements

17

6.1

Filament Winding

17

6.2

Coal Combustion Exposure Test

17

6.3

Results and Discussion

19

6.3.1

Permeability

19

6.3.2

C-ring Strength

19

6.3.3

Microstructure

20

6.4

Conclusion and Recommendations for Full-Scale Elements

22

7.0

Full-Scale Filter Elements:  One Meter Elements

23

7.1

Vacuum Winding

23

7.2

Bonding

23

7.3

Flange Machining Issues

23

7.4

W-STC HTHP Test

24

7.4.1

Filter Issues

24

7.5

Results and Discussion

24

7.5.1

Composition

24

7.5.2

Permeability

24

7.5.3

C-ring Strength

25

7.5.4

Microstructure

25

7.6

Conclusions and Recommendations

26

8.0

Filter Improvement and Cost Reduction

27

8.1

Vacuum Winding

27

8.1.1

Nextel Fiber Shape

27

8.1.2

Fiber Architecture

27

8.1.3

Net Shape Flange

28

8.2

Bonding

28

8.3

Results and Discussion

29

8.3.1

C-ring Strength and Permeability

29

8.4

Conclusions and Recommendations

29

9.0

Fabrication of 50 Elements for Testing:  Karhula PCFB Test

30

9.1

Results and Discussion

30

9.1.1

Composition and Permeability

30

9.1.2

Surface Defects

30

9.1.3

C-Ring Strength

31

9.2

Conclusions and Recommendations

31

10.0

Fabrication of 50 Elements for Testing:  PSDF Test

32

10.1

Results and Discussion

32

10.1.1

Composition and Permeability

32

10.1.2

PSDF TCO2 Thermal Excursion

32

11.0

CFCC Modeling and Testing Support

33

12.0

Conclusions and Recommendations

34

12.1

Benefits of the MTI Vacuum Wound Filter Element

34

12.2

Development Status and Manufacturing Scale-Up

34

12.3

Future Work

35