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Sulfur Deposition Web PageThis intra-company web page is dedicated to the problem of sulfur depostion. Information contained on this page includes:
Last updated 08/30/06 |
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GPSRC Research Funding Sought Sulfur Deposition Report FormPlease use the below form to report any new sulfur depostion problems or updates on ongoing problems. |
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Date Discovered
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PG&E Station
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Line
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Contact
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Details
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| 12/28/01 | Aromas Station | L-181B tap |
Larry Berg Gas T&R Supervisor x642-3455 |
07/18/02 - No problems. Filter working well 08/11/06 - Filter is still working well. No significant sulfur. Failure reported at Granite Rock due to sulfur plugging |
| 09/27/02 | Vallejo - Hermann Station | L-21 | Ken DeGraca Constructin Supervisor x335-5678 |
09/27/02 - Report of Mooneys plugging 01/05/03 - Sulfagon F-25 filter installed 12/06/03 - Filters working. No problems reported. 01/27/04 - Freeze up when new cartridge installed. 02/27/04 - New "baked" cartridge (dried out) installed. Problem solved 01/03/05 - No problems. 08/18/06 - Filters working fine. No problems |
| 8/29/02 | Redding - Station 53 | Craig Combs Gas Control Tech x763-6472 |
08/29/02 - Significant sulfur buildup on regulator 01/01/03 - Sulfgon filters installed on primary regs 08/01/04 - Replaced F-25 with F-4 regs. Working well 01/04/05 - Sulfagon filters installed on both runs - regs and monitors. 08/08/06 - No problems reported. Filters appear to be working. Class A insp soon. |
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| 01/01/02 | Stockton Airport and Zephyr others |
L-108 | Roger Morshead T&R Supervisor x842-6555 |
03/02/02 - Sulfagon filter installed at Airport & Zephyr 06/14/02 - No sulfur on inspection (Airport a& Zephyr) 12/02/02 - Sulfur found in regulator at Schulte Road (monitor clean) 08/10/04 - Sulfur found at other stations, by Jim Lew 08/09/06 - Sulfur problems still existing in L-108 corridor, but nothing serious. Nuisances handled by maintenance. |
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Other Utilities
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| pre-2001 | SoCal Gas | May Lew | SoCal Gas has had a long history of sulfur deposition problems throughout its system. They have made great use of the Sulfagon filters (mostly the larger F-5ST) at dozens of sites. | |
| Questar (Salt Lake City, UT) | Brian Niebergall | No problems in 2001 (50-50 blend THT-TBM) | ||
| 2001 est | Avista (Spokane, WA) | Jenny Blaylock | Three to four station out of dozens experience sulfur problems. It appears to be seasonal. Pilot heaters were placed on these stations with some success, but still some sulfur persists. Increased inspections for problem regs. |
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| Southwest Gas | Steve Frehs | Problems in Victorville area. 50-50 blend of THT/TBM since 1993.. | ||
| Excel Energy | Rosemarie Halchuk | |||
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Teflon Parts for Mooney Regs
Contact Tri-Pacific Inc - 4345 Pacific Street, Rocklin, CA 95677
Claude Transue, Larry Whitefoot or Jim Green
(916) 630-2323 or [email protected]
Pilot Heaters
Increasing the pilot gas temperature can eliminate sulfur deposition problems in most cases.
Bruest Catalytic Heaters
Catco Catalytic Heaters
Sulfagon Filters
There are two sizes of Sulfagon filters available for purchase - medium and large. The smaller size F-25 is no longer available. These filters are supplied by Welker Engineering via Uniflow Systems.
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Model
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Material Code
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Description
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Cost
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Medium |
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| F-4ST |
MO40821
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Welker Sulfur Filter Assembly with Cartridge, Part Number F04000ISC: 2/3 Sulfur-Gon, 1/3 Silica Gel, Dimensions: 13½" Long X 4" Diameter, ¼" NPT, Inlet/Outlet, Carbon Steel Hex Plugs |
$279
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| F-4ST |
MO40823
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Replacement Cartridge, Part Number FE138OOSC: 2/3 Sulfur-Gon, 1/3 Silica Gel, Single Cylinder Cartridge |
$71
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| Large | |||
| F-5ST |
MO40824
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Welker Sulfur Filter Assembly with Cartridge, Part Number F05000HSC: 2/3 Sulfur-Gon, 1/3 Silica Gel, Dimensions: 20½" Long X 4" Diameter, ¼" NPT Inlet/Outlet, Carbon Steel Hex Plugs. |
$317
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| F-5ST |
MO40825
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Replacement Cartridge, Part Number FE094OOSC: 2/3 Sulfur-Gon, 1/3 Silica Gel, Double Cylinder Cartridge |
$99
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| Effects of Heating Gas on Sulfur Deposition
Sulfur deposition generally occurs when there is a large pressure cut. Temperatures drops of approximately 7oF per 100 psi are associated with these pressure drops. As the temperatures dropse gas drops the sulfur equilibrium concentration will also drop (see Figure 7). The "holding ability" of the gas is reduced and at low enough temperatures, the sulfur will drop out of solution. To prevent or reduce this dropping out of sulfur, the gas can be preheated before it is regulated down. Figure 8 shows how this heating can avoid or minimize sulfur drop out. |
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Sulfagon filter installed at Aromas Station |
 Sulfur Deposition on Mooney Pilot Stem |
 Sulfur Plating on Mooney Grid (left side) |
Engineering/Gas Quality: Thom Trimble, Senior Gas Engineer, GED 925-974-4145
Distribution - James Lew, Senior Gas Distribution Specialist 925-866-5752
Sulfagon Sales Rep - Vince O'Connor, Uniflow Systems 916-630-9369
