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On-line monitoring method of petrochemical water cooler leakage

A petrochemical and water cooler technology, which is applied in the application of light to test the fluid tightness, etc., can solve the problems of increased leakage of water coolers, increased sewage treatment costs, and great impact, so as to save water consumption and chemical consumption , Save the time of checking for leaks and improve the speed of checking for leaks

Inactive Publication Date: 2013-07-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leakage of the water cooler will cause the following problems: ① lead to water pollution and increase the cost of sewage treatment. If it is not found in time, it is necessary to replace a large amount of fresh water and add a large amount of antiseptic, bactericidal and other chemicals. The circulating water system needs one month or even several months. In order to gradually stabilize and seriously affect the normal production work; ② bring serious safety hazards to production, if an accident occurs, it will cause huge economic losses; It is difficult to find the location of the leakage by measuring the concentration of oil in the water at the inlet and outlet of the circulating water, and it takes a lot of manpower and time to check one by one
[0013] Among the above methods, UV spectrometry, UV fluorescence method, near-infrared method and optical fiber method can be used for on-line monitoring, but these technologies are rarely used in domestic petrochemical enterprises.
The reason is: the composition of organic pollutants is mixed due to the leakage of the water cooler, including different types of oil from different heat exchangers, artificially added various water treatment agents and interference substances, etc., plus the influence of complex backgrounds such as water quality color and particles , no online instrument can solve all the problems, and it is also greatly affected by the actual working conditions, which makes it more difficult to detect the leakage of the water cooler

Method used

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  • On-line monitoring method of petrochemical water cooler leakage
  • On-line monitoring method of petrochemical water cooler leakage
  • On-line monitoring method of petrochemical water cooler leakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1: image 3 It is a schematic diagram of the distribution of water coolers in the styrene-butadiene workshop of a rubber factory. The cooling medium of the water coolers in the workshop is styrene and lubricating oil. This monitoring device is equipped with a sampling port at the general exit of the workshop, and a set of optical fiber online monitors and ultraviolet fluorescence online monitors are installed in series. For the monitor, the optical fiber online monitor can monitor the changes of the two water-cooling media in the water, and take one data every 15 seconds; while the ultraviolet fluorescence online monitor can only monitor the change of the styrene content in the water, and collect one data every 1 second.

[0045] The results of monitoring for 50 days showed that the reading of the optical fiber monitor was greater than 50ppm, while the reading of the ultraviolet fluorescence monitor was between 1.5 and 2.5ppm, indicating that there was leakage in...

Embodiment 2

[0046] Example 2: The water cooling medium of the water cooler in the olefin workshop of a petrochemical plant is C2-C4 olefins, so a UV spectroscopic on-line monitor is installed at the outlet of the hot zone to monitor the changes in the content of unsaturated hydrocarbons in the water. 1 second to collect a data.

[0047] The test results of monitoring for 50 days showed that the reading of the ultraviolet spectrophotometer was between 8 and 12ppm, which proved that there was leakage in the separation hot zone of the workshop.

Embodiment 3

[0048] Example 3: The MTBE device of a certain oil refinery contains a methanol water cooler. A near-infrared online detector is installed at the circulating water outlet of the device to monitor the methanol content in the circulating water and collect data every 10 seconds. The monitoring results showed that the near-infrared reading was around 100ppm, which confirmed that there was leakage in the methanol water cooler of the device.

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Abstract

An on-line monitoring method of petrochemical water cooler leakage comprises the following steps that: firstly, a monitoring network which includes a sampling system, a monitoring station, an engineer station and an operator station is established and the sampling system is installed on a circulating water return water pipeline of the water cooler to be monitored; then one or more kinds of an ultraviolet spectrometry monitor, an ultraviolet fluorescence monitor, a fiber monitor and a near infrared monitor is selected to monitor on-line organic matter concentration changes in water according to types of cooling mediums of the water cooler; the engineer station determines the type of leakage medium in the pipeline according to monitoring data and a monitoring scope; the operator station determines the type of the water cooler which occurs leakage and preliminarily determines an area where the leakage water cooler locates according to the types of the leakage medium; finally, a portable monitor is used to search the water cooler which occurs leakage in the leakage area. By using the method, a plurality of monitors and the portable monitor can be used to rapidly determine the leakage water cooler so that potential safety hazard can be eliminated timely. Time for searching leakage points during major repairing can be saved and work loads can be effectively reduced.

Description

technical field [0001] The invention relates to an on-line monitoring system and a monitoring method for the leakage of a petrochemical water cooler. Background technique [0002] Leakage of water coolers is a common problem in domestic petrochemical enterprises due to device aging, maintenance quality, seal damage, and operational fluctuations. The leakage of the water cooler will cause the following problems: ① lead to water pollution and increase the cost of sewage treatment. If it is not found in time, it is necessary to replace a large amount of fresh water and add a large amount of antiseptic, bactericidal and other chemicals. The circulating water system needs one month or even several months. In order to gradually stabilize and seriously affect the normal production work; ② bring serious safety hazards to production, if an accident occurs, it will cause huge economic losses; It is difficult to find out the location of the leakage by measuring the concentration of oi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/38
Inventor 杨明德陈镇刘吉宋莹华王欣昌党杰胡湖生吴玉龙
Owner TSINGHUA UNIV
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