Device for controlling endpoint of gasoline blending component extracted from tower sideline vapor phase and method thereof

Abstract

The invention discloses a device for controlling the endpoint of a gasoline blending component extracted from a tower sideline vapor phase and a method thereof. In the device, a first heat exchanger is connected with a weight-removing column phase and stabilized gasoline passes through the first heat exchanger and enters into the weight-removing column; A pipeline at the top of the weight-removing column is connected with a second heat exchanger, which is connected with a reflux drum phase through the pipeline; a light component at the top of the tower passes through the pipeline at the top of the tower, undergoes heat exchange in the second heat exchanger and enters into the reflux drum after cooling; one part of the light component returns to the top of the weight-removing column by the use of a first discharging pump and the other part is outputted as a product; rectifying section sideline of the weight-removing column and / or stripping section sideline are respectively connected with a third heat exchanger and the first heat exchanger; the flow rate of the gasoline blending component extracted from a liquid phase of the rectifying section and / or a vapor phase of the stripping section is controlled according to the temperature change of a temperature measuring point; the extracted gasoline blending component undergoes heat exchange in the third heat exchanger and the first heat exchanger and then is outputted after cooling; a second discharging pump is arranged at the bottom of the weight-removing column, and a removed heavier component is outputted by the second discharging pump.

Description

technical field [0001] The invention relates to the fields of oil refining and petrochemical industry, in particular to a device and method for controlling the dry point of gasoline blending components by extracting the vapor phase from a side line of a tower. Background technique [0002] Gasoline dry point is an important control index in the national standard of motor gasoline, and the index in the current national standard GB17930-2006 is not greater than 205°C. The existing production equipment generally adopts the method of multi-tower step-by-step cutting, figure 1 It is a schematic flow diagram of using double towers to control the dry point of gasoline blending components in the prior art. figure 1 Among them, 101 is light removal tower, 102 is weight removal tower, 103 and 104 are cooling equipment, 105 and 106 are reflux tanks, 107 and 108 are heating equipment, 109, 110, 111 and 112 are pumps, arrow A1 is stable For gasoline, arrow A2 is light components (inclu...

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Problems solved by technology

[0004] The invention provides a device and method for controlling the dry point of gasoline blending components by extracting the vapor phase from the side line of the tower to overcome the problems of high energy consumption, large floor space and high investment caused by the removal of multiple towers in the prior art

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