Fondeur et al 2007a - Revision history

Scipediacontent at 10:10, 22 January 2021

2021-01-22T10:10:33Z

Scipediacontent: Scipediacontent moved page Draft Content 399470861 to Fondeur et al 2007a

2020-10-22T13:36:32Z

Scipediacontent moved page Draft Content 399470861 to Fondeur et al 2007a

Scipediacontent: Created page with " == Abstract == Effluent streams from the Modular Caustic-Side Solvent Extraction Unit (MCU) will transfer to the tank farms and to the Defense Waste Processing Facility (DWP..."

2020-10-22T13:36:28Z

Created page with " == Abstract == Effluent streams from the Modular Caustic-Side Solvent Extraction Unit (MCU) will transfer to the tank farms and to the Defense Waste Processing Facility (DWP..."

New page

== Abstract ==

Effluent streams from the Modular Caustic-Side Solvent Extraction Unit (MCU) will transfer to the tank farms and to the Defense Waste Processing Facility (DWPF). These streams will contain entrained solvent. A significant portion of the Strip Effluent (SE) pipeline (i.e., acid stream containing Isopar{reg_sign} L residues) length is within one inch of a sludge stream. Personnel envisioned the sludge stream temperature may reach 100 C during operation. The nearby SE stream may receive heat from the sludge stream and reach temperatures that may lead to flammability issues once the contents of the SE stream discharge into a larger reservoir. To this end, personnel used correlations from the literature to estimate the maximum temperature rise the SE stream may experience if the nearby sludge stream reaches boiling temperature. Several calculation methods were used to determine the temperature rise of the SE stream. One method considered a heat balance equation under steady state that employed correlation functions to estimate heat transfer rate. This method showed the maximum temperature of the acid stream (SE) may exceed 45 C when the nearby sludge stream is 80 C or higher. A second method used an effectiveness calculation used to predict the heat transfer rate in more » single pass heat exchanger. By envisioning the acid and sludge pipes as a parallel flow pipe-to-pipe heat exchanger, this method provides a conservative estimation of the maximum temperature rise. Assuming the contact area (i.e., the area over which the heat transfer occurs) is the whole pipe area, the results found by this method nearly matched the results found with the previous calculation method. It is recommended that the sludge stream be maintained below 80 C to minimize a flammable vapor hazard from occurring. « le

Document type: Report

== Full document ==
<pdf>Media:Draft_Content_399470861-beopen12-1722-document.pdf</pdf>

== Original document ==

The different versions of the original document can be found in:

* [http://dx.doi.org/10.2172/917511 http://dx.doi.org/10.2172/917511]

* [https://digital.library.unt.edu/ark:/67531/metadc883026/m2/1/high_res_d/917511.pdf https://digital.library.unt.edu/ark:/67531/metadc883026/m2/1/high_res_d/917511.pdf]

* [https://core.ac.uk/display/71309823 https://core.ac.uk/display/71309823],[https://www.osti.gov/servlets/purl/917511 https://www.osti.gov/servlets/purl/917511],[https://academic.microsoft.com/#/detail/2182859619 https://academic.microsoft.com/#/detail/2182859619]

@@ Line 2: / Line 2: @@
 == Abstract ==
-Effluent streams from the Modular Caustic-Side Solvent Extraction Unit (MCU) will transfer to the tank farms and to the Defense Waste Processing Facility (DWPF). These streams will contain entrained solvent. A significant portion of the Strip Effluent (SE) pipeline (i.e., acid stream containing Isopar{reg_sign} L residues) length is within one inch of a sludge stream. Personnel envisioned the sludge stream temperature may reach 100 C during operation. The nearby SE stream may receive heat from the sludge stream and reach temperatures that may lead to flammability issues once the contents of the SE stream discharge into a larger reservoir. To this end, personnel used correlations from the literature to estimate the maximum temperature rise the SE stream may experience if the nearby sludge stream reaches boiling temperature. Several calculation methods were used to determine the temperature rise of the SE stream. One method considered a heat balance equation under steady state that employed correlation functions to estimate heat transfer rate. This method showed the maximum temperature of the acid stream (SE) may exceed 45 C when the nearby sludge stream is 80 C or higher. A second method used an effectiveness calculation used to predict the heat transfer rate in more » single pass heat exchanger. By envisioning the acid and sludge pipes as a parallel flow pipe-to-pipe heat exchanger, this method provides a conservative estimation of the maximum temperature rise. Assuming the contact area (i.e., the area over which the heat transfer occurs) is the whole pipe area, the results found by this method nearly matched the results found with the previous calculation method. It is recommended that the sludge stream be maintained below 80 C to minimize a flammable vapor hazard from occurring. « le
+Effluent streams from the Modular Caustic-Side Solvent Extraction Unit (MCU) will transfer to the tank farms and to the Defense Waste Processing Facility (DWPF). These streams will contain entrained solvent. A significant portion of the Strip Effluent (SE) pipeline (i.e., acid stream containing Isopar{reg_sign} L residues) length is within one inch of a sludge stream. Personnel envisioned the sludge stream temperature may reach 100 C during operation. The nearby SE stream may receive heat from the sludge stream and reach temperatures that may lead to flammability issues once the contents of the SE stream discharge into a larger reservoir. To this end, personnel used correlations from the literature to estimate the maximum temperature rise the SE stream may experience if the nearby sludge stream reaches boiling temperature. Several calculation methods were used to determine the temperature rise of the SE stream. One method considered a heat balance equation under steady state that employed correlation functions to estimate heat transfer rate. This method showed the maximum temperature of the acid stream (SE) may exceed 45 C when the nearby sludge stream is 80 C or higher. A second method used an effectiveness calculation used to predict the heat transfer rate in moreÂ Â» single pass heat exchanger. By envisioning the acid and sludge pipes as a parallel flow pipe-to-pipe heat exchanger, this method provides a conservative estimation of the maximum temperature rise. Assuming the contact area (i.e., the area over which the heat transfer occurs) is the whole pipe area, the results found by this method nearly matched the results found with the previous calculation method. It is recommended that the sludge stream be maintained below 80 C to minimize a flammable vapor hazard from occurring. Â«Â le
-−
-Document type: Report
-−
-== Full document ==
-<pdf>Media:Draft_Content_399470861-beopen12-1722-document.pdf</pdf>
@@ Line 18: / Line 13: @@
 * [https://digital.library.unt.edu/ark:/67531/metadc883026/m2/1/high_res_d/917511.pdf https://digital.library.unt.edu/ark:/67531/metadc883026/m2/1/high_res_d/917511.pdf]
-* [https://core.ac.uk/display/71309823 https://core.ac.uk/display/71309823],[https://www.osti.gov/servlets/purl/917511 https://www.osti.gov/servlets/purl/917511],[https://academic.microsoft.com/#/detail/2182859619 https://academic.microsoft.com/#/detail/2182859619]
+* [https://core.ac.uk/display/71309823 https://core.ac.uk/display/71309823],

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