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Method for reducing pressure difference inside debutanizer

A technology of debutanizer and internal pressure, applied in the field of debutanizer, can solve the problems of complexity and poor removal of clogging, and achieve the effect of reducing the pressure difference of the whole tower and simplifying the process flow

Active Publication Date: 2021-02-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome that there is no effective method to accurately locate the blockage of the debutanizer existing in the prior art, the effect of removing the blockage is not good, and the high-pressure flushing operation will introduce new impurities, which will bring great inconvenience to production , the complex problem of the high-pressure flushing device, and provide a method to reduce the pressure difference inside the debutanizer tower. Under the premise of not changing the existing production conditions, this method accurately confirms the clogging position of the tray through external measures, and uses the top of the tower The product directly flushes the fouling area, which can effectively reduce the pressure difference of the whole tower, and the effect is more obvious

Method used

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  • Method for reducing pressure difference inside debutanizer

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (a1) Utilize the γ-ray instrument (produced by Hunan Yueyang Changling Equipment Research Institute Co., Ltd., the model is GTS2015) to scan the situation of the tray inside the debutanizer, and detect the clogged tray area; from Figure 2d It can be seen that after the pressure difference of the debutanizer is blocked, the wave peaks at the 45th and 46th floors are all lower, and it is judged that the bottom gap of the downcomer on the 45th floor is blocked on the north side, and the bottom gap on the south side of the liquid receiver on the 46th floor is blocked. more likely.

[0043](a2) Using the infrared imager (manufactured by MIKRON, model 7604) to detect the blockage of the tray area in the debutanizer tower, it was found that the local temperature of the downcomer on the south side of the 46th floor was low, indicating that There is fluid in the downcomer. It is basically consistent with the results of gamma ray scanning.

[0044] (b) The schematic diagram of...

Embodiment 2

[0048] (a) Use the γ-ray instrument to scan the condition of the trays inside the debutanizer, and detect the clogged tray area; after the differential pressure of the debutanizer is blocked, the peaks at the 40th and 41st floors are all low, judging The 41-layer tray is more likely to be clogged.

[0049] (b) In the clogged tray area, use ultrasound to locate the position of the ring weld of the supporting ring in the tower, and determine the position of the bottom gap of the downcomer in the tower according to the construction drawings of the debutanizer tower, and then in the 41st floor tower wall Open the first flushing hole 11 with pressure along the bottom gap of the downcomer, and lead a pipeline from the outlet end of the tower top product recovery pump 3 to communicate with the first flushing hole 11, so that the flushing medium in the pipeline enters the debutting The inside of the butanizer tower is used to flush the fouling that affects the pressure difference in t...

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Abstract

The present invention relates to the technical field of debutanizer, and discloses a method for reducing the pressure difference inside the debutanizer, including: (a1) using gamma rays to scan the condition of the inner tray of the debutanizer to detect clogged tray areas; and / or (a2) scanning the condition of the debutanizer internal trays by infrared rays to detect clogged tray areas; (b) using ultrasonic waves to locate the position of welds in the column internals within the clogged tray areas , the tower wall at the position of the welding seam carries out the flushing hole with pressure along the bottom gap of the downcomer, connects the flushing line with the flushing hole, and then flushes the flushing medium into the debutanizer through the flushing line Scaling that affects the pressure difference inside the tower to reduce the pressure difference inside the tower; the flushing medium is the top product of the debutanizer. This method does not change the existing production conditions, accurately locates the clogging position, uses the material in the tower to flush, and has an obvious effect of reducing the pressure difference in the tower.

Description

technical field [0001] The invention relates to the technical field of debutanizer, in particular to a method for reducing the pressure difference inside the debutanizer. Background technique [0002] During the long-term operation of the debutanizer, there is a problem of clogging, and due to the water in the feed, polymerization initiators such as rust are produced in the tower, which accelerates the polymerization in the debutanizer, and the pressure difference of the tower rises rapidly, resulting in Blockage of debutanizer. The existing treatment technology mainly suppresses the formation of polymers by injecting polymerization inhibitors, dispersants, etc., and at the same time adjusts other parameters and indicators of the system to achieve the purpose of reducing the pressure difference, but the problem of clogging still exists. [0003] Once the tray is clogged, it is difficult to accurately locate the specific position that affects the clogged tray, or even if the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/12
CPCC10G7/12
Inventor 蒋明敬张孝明朱曙光郝宝林汪旭顾伟军
Owner CHINA PETROLEUM & CHEM CORP