Method and apparatus for controlling polyolefin reactor temperature

a technology of polyolefin and reactor temperature, which is applied in the direction of process and machine control, analogue processes for specific applications, instruments, etc., can solve the problems of poor temperature control of the polymerization process, the coolant system is too small, and the temperature control of the reactor is poor, so as to increase the cost of manufacturing polyethylen
US20050091021A1Inactive Publication Date: 2005-04-28CHEVRON PHILLIPS CHEMICAL CO LP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CHEVRON PHILLIPS CHEMICAL CO LP
Publication Date
2005-04-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods and apparatus for controlling polyolefin reactor temperature. In one embodiment, a simulation model is constructed for improving control of polymerization temperature in a polyethylene loop slurry reactor. The model is used to design the reactor coolant system to capacity and to improve tuning of system controllers, such as the reactor temperature controller and coolant temperature controller. A coolant control valve is sized having a bilinear flow characteristic which improves Cv reproducibility at low coolant flow rates and thus improves reactor temperature control.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates generally to the polymerization of polyolefins and, more specifically, to the use of a coolant system and simulation model to control temperature in a polyethylene loop slurry reactor.

[0003] 2. Description of the Related Art

[0004] This section is intended to introduce the reader to aspects of art that may be related to aspects of the present invention, which are described and / or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.

[0005] As chemical and petrochemical technologies have advanced, the products of these technologies have become increasingly prevalent in society. In particular, as techniques for bonding simple ...

Claims

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