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Method and apparatus for measuring and calculating the dew point of the overhead product of a fractionation column

A fractionation tower, dew point technology, applied in the field of fractionation towers, which can solve problems such as expensive repairs and losses

Active Publication Date: 2016-09-21
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to costly repairs and loss of

Method used

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  • Method and apparatus for measuring and calculating the dew point of the overhead product of a fractionation column
  • Method and apparatus for measuring and calculating the dew point of the overhead product of a fractionation column
  • Method and apparatus for measuring and calculating the dew point of the overhead product of a fractionation column

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Embodiment Construction

[0015] The present invention helps prevent undesirable steam condensation by providing warning alerts to the operator of conditions approaching the water dew point so that proper adjustments can be made before the stripping column becomes upset. It determines the instrumentation and appropriate calculations needed to determine the dew point and dew point range in real time, allowing proper control and operation of the column, which helps minimize energy consumption.

[0016] This scheme provides a simple calculation that is easily configured within a common control system that indicates the water dew point range online in real time. The overhead flow from the column was determined by measuring receiver vapor, receiver waterboot, reflux hydrocarbon liquid, and net overhead hydrocarbon liquid. Receiver vapor, reflux hydrocarbon liquid, and net overhead hydrocarbon liquid are measured using mass flow meters such as Coriolis flow meters. The mass flow meter provides information t...

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Abstract

Methods and apparatus for controlling the operation of a fractionation column to avoid column flooding are described. The device uses a mass flow meter to measure the mass flow rate of the receiver vapor as well as the stripper hydrocarbon liquid stream or stripper reflux and stripper net overhead liquid. Water from the receiver can be measured with a volume flow meter or a mass flow meter. The equipment also includes a molecular weight analyzer or specific gravity analyzer; top vapor line pressure gauge; top vapor line thermometer; hydrocarbon liquid outlet line thermometer; stripper hydrocarbon stream mass flow meter, or stripper return hydrocarbon liquid mass flow meter at least one computer in communication with the stripper net top hydrocarbon liquid mass flow meter; the vapor mass flow meter; and the water flow meter.

Description

[0001] Priority claims from earlier national applications [0002] This application claims priority to US Application No. 13 / 558,887, filed July 26, 2012, and US Application No. 13 / 558,896. field of invention [0003] The present invention relates generally to fractionation columns, and more particularly to apparatus and methods for controlling the operation of fractionation columns to avoid column flooding. Background of the invention [0004] Many different applications in the hydrocarbon refining and petrochemical industries use strippers to remove lower boiling point compounds from liquid streams containing compounds of various boiling ranges. The introduction of steam into the steam stripping fractionation column is advantageous for the separation of different boiling compounds. However if too much steam is added for the heat available in the column, the steam can condense on the stripper trays where it forms water and eventually overflows the stripper, causing major o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/42C10G7/12
CPCC10G7/12B01D3/42
Inventor R·K·赫恩J·W·哈里斯A·戈亚尔X·X·朱
Owner UOP LLC