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LC refining combined with screen fractionation – Reduction of system complexity for mechanical pulping
Holmen Paper AB. (FORIC)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FORIC)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FORIC)ORCID-id: 0000-0003-1881-6473
2018 (engelsk)Inngår i: IMPC 2018, Trondheim, Norway, 2018Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Process intensification - a process development method used in the chemical process industry has been appliedto mechanical pulping process design. Process intensification is characterized by significant reduction of energyconsumption and process complexity.A process with single stage high consistency (HC) refining followed by low consistency (LC) refining andscreening was evaluated in mill trials at the Holmen Paper Braviken mill, Sweden. After LC refining, pulp wasscreened and the reject was fed back to LC refining. The process is called HC-LC-S. Two different HC primaryrefiner types were evaluated – single disc (SD) and double disc (DD).High intensity DD chip refining was more suitable than single disc refining for the process due to higher lightscattering and lower shives content of the final pulp. It was also easier to reach high enough tensile index beforeLC refining with the DD refining. The DD-LC-S process required 1940 kWh/adt total specific energy for newsgrade TMP, which was 300 kWh/adt lower than the reference TMP line; DD chip refining and HC rejectrefining. The auxiliary specific energy was reduced with 100 kWh/adt.Six unit operations and three chests with agitators and pumps were omitted compared to a conventional TMPline.

sted, utgiver, år, opplag, sider
Trondheim, Norway, 2018.
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-34674OAI: oai:DiVA.org:miun-34674DiVA, id: diva2:1254433
Konferanse
International Mechanical Pulping Conference (IMPC) 2018, May 27-30, 2018, Trondheim, Norway
Tilgjengelig fra: 2018-10-09 Laget: 2018-10-09 Sist oppdatert: 2018-10-09bibliografisk kontrollert

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Sandberg, ChristerBerg, Jan-ErikEngstrand, Per

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