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US 10,894,840 B2Granted
Unified cooling for multiple polyolefin polymerization reactors
AssigneeChevron Phillips Chemical Company LP
InventorsTimothy O. Odi, Ralph Romig, Anurag Gupta
Life of this patent
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Abstract
A system and method for a polyolefin reactor temperature control system having a first reactor temperature control path, a second reactor temperature control path, and a shared temperature control path. The shared temperature control path is configured to combine and process coolant return streams, and to provide coolant supply for the first reactor temperature control path and the second reactor temperature control path.
Claims17
A polyolefin reactor temperature control system comprising:
- (a) a first reactor temperature control path for:
- a first control feed stream to split into at least (1) a first cooler zone feed stream to pass through a first cooler zone to produce a first cooler zone output stream and (2) a first cooler zone bypass stream;
- a first treated stream having a first treated stream temperature and comprising the first cooler zone output stream and the first cooler zone bypass stream;
- a first treated stream control system configured to adjust the first treated stream temperature by manipulating flow rates of one or both of:
- the first cooler zone output stream and/or the first cooler zone bypass stream;
- and
- a first recycle stream comprising the first treated stream after the first treated stream has exchanged energy with a first polyolefin reactor;
- (b) a second reactor temperature control path for:
- a second control feed stream to split into at least (1) a second cooler feed stream to pass through a second cooler zone to produce a second cooler zone output stream and (2) a second cooler zone bypass stream;
- a second treated stream having a second treated stream temperature and comprising the second cooler zone output stream and the second cooler zone bypass stream;
- a second treated stream control system configured to adjust the second treated stream temperature by manipulating flow rates of one or both of:
- the second cooler zone output stream and/or the second cooler zone bypass stream;
- and
- a second recycle stream comprising the second treated stream after the second treated stream has exchanged energy with a second polyolefin reactor;
- and
- (c) a shared temperature control path configured to:
- combine the first and second recycle streams to form a combined recycle stream;
- process the combined recycle stream through shared system equipment to form a shared output stream;
- and
- split the shared output stream into the first control feed stream and the second control feed stream.
17 more elements
A polyolefin reactor temperature control system comprising:
- (a) a first reactor temperature control path for:
- a first control feed stream to split into at least (1) a first cooler zone feed stream to pass through a first cooler zone to produce a first cooler zone output stream and (2) a first cooler zone bypass stream;
- a first treated stream having a first treated stream temperature and comprising the first cooler zone output stream and the first cooler zone bypass stream;
- a first treated stream control system configured to adjust the first treated stream temperature by manipulating flow rates of one or both of:
- the first cooler zone output stream and/or the first cooler zone bypass stream;
- and
- a first recycle stream comprising the first treated stream after the first treated stream has exchanged energy with a first polyolefin reactor;
- (b) a second reactor temperature control path for:
- a second control feed stream to split into at least (1) a second cooler feed stream to pass through a second cooler zone to produce a second cooler zone output stream and (2) a second cooler zone bypass stream;
- a second treated stream having a second treated stream temperature and comprising the second cooler zone output stream and the second cooler zone bypass stream;
- a second treated stream control system configured to adjust the second treated stream temperature by manipulating flow rates of one or both of:
- the second cooler zone output stream and/or the second cooler zone bypass stream;
- and
- a second recycle stream comprising the second treated stream after the second treated stream has exchanged energy with a second polyolefin reactor;
- and
- (c) a shared temperature control path configured to:
- combine the first and second recycle streams to form a combined recycle stream;
- process the combined recycle stream through shared system equipment to form a shared output stream;
- and
- split the shared output stream into the first control feed stream and the second control feed stream,
- wherein the first cooler zone feed stream, first cooler zone bypass stream, second cooler zone feed stream, second cooler zone bypass stream, first treated stream, second treated stream, and combined return stream are connected in a closed loop, hydraulically full system.
18 more elements
Dependencies are inferred from the claim text.