EP 0563554 B1 19960612 - Method and installation for elimination of mercury from contaminated pipes and parts of installation, especially of mercury which comes from natural gas
Title (en)
Method and installation for elimination of mercury from contaminated pipes and parts of installation, especially of mercury which comes from natural gas
Title (de)
Verfahren und Anlagen zur Entfernung von Quecksilber aus kontaminierten Rohren und Anlagenteilen, insbesondere von mit Erdgas eingetragenem Quecksilber
Title (fr)
Procédé et installation pour éliminer du mercure de tuyaux contaminés et de pièces d'installation, notamment du mercure transporté avec le gaz naturel
Publication
Application
Priority
- DE 4210455 A 19920330
- US 12292493 A 19930917
Abstract (en)
[origin: US5529605A] Pipe lines for conducting natural gas become contaminated, over a period of time, by an accumulation of mercury, which occurs in minute amounts in natural gas. If used pipe is scrapped, for example by melting, mercury vapor escaping to the atmosphere poses a health hazard. To remove mercury, sections of pipe are closed at both ends by plugs having nipples for connection to a closed circuit and inert gas line connected with a pump for evacuating the line and with a source of inert gas, for example nitrogen. The closed circuit inert gas line contains a blower for circulating the inert gas repeatedly through the pipe sections and a condenser for condensing mercury vapor. The closed circuit further includes a heat exchanger for removing heat upstream of the condenser, a coordinated heat exchanger for restoring heat removed and an additional heater. The pipe sections are heated externally by an oven or internally by heated inert gas.
IPC 1-7
IPC 8 full level
B08B 7/00 (2006.01); B08B 9/00 (2006.01); B08B 9/02 (2006.01); C22B 43/00 (2006.01); F16L 53/00 (2006.01)
CPC (source: EP US)
B08B 7/00 (2013.01 - EP US); B08B 9/032 (2013.01 - EP US); C22B 43/00 (2013.01 - EP US); B08B 2230/01 (2013.01 - EP US); Y10T 137/0419 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 5529605 A 19960625; AT E139151 T1 19960615; DE 4210455 C1 19930923; DE 59302869 D1 19960718; DK 0563554 T3 19960701; EP 0563554 A1 19931006; EP 0563554 B1 19960612; ES 2090728 T3 19961016; GR 3020945 T3 19961231; HU 9300604 D0 19930928; HU T68534 A 19950628; PL 171014 B1 19970228; PL 171702 B1 19970630; PL 298297 A1 19940124
DOCDB simple family (application)
US 12292493 A 19930917; AT 93102309 T 19930215; DE 4210455 A 19920330; DE 59302869 T 19930215; DK 93102309 T 19930215; EP 93102309 A 19930215; ES 93102309 T 19930215; GR 960402305 T 19960904; HU 9300604 A 19930305; PL 29829793 A 19930329; PL 31524793 A 19930329