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A method for circular flushing of carbon steel pipes in a fine cooling system

A cooling system and pipeline technology, applied in cleaning methods and appliances, chemical instruments and methods, cleaning hollow objects, etc., can solve the problems of poor flushing effect and difficulty in realizing economical and applicable cleaning, and achieve good flushing effect and reduced replacement volume , time-consuming effect

Active Publication Date: 2017-01-11
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problems existing in the prior art, and provides a fine cooling and lubricating carbon steel pipeline circulation flushing method, which mainly solves the technical problems of economical cleaning and poor flushing effect that are difficult to realize on site in the existing methods

Method used

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  • A method for circular flushing of carbon steel pipes in a fine cooling system
  • A method for circular flushing of carbon steel pipes in a fine cooling system
  • A method for circular flushing of carbon steel pipes in a fine cooling system

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for circularly flushing carbon steel pipes in a fine cooling system, the method comprising the following steps: 1) connecting the carbon steel pipes of different diameters to be flushed in categories and opening at the ends;

[0033] 2) Pass compressed air into the classification pipeline to be flushed for 15 to 30 minutes, and flush out the relatively shallow impurities attached to the inner surface of the pipeline from the opening;

[0034] 3) Put steel balls of different diameters into pipes of different diameters. The number of the steel balls is at least 3. Use compressed air to blow the steel balls from the mouth of the pipe to the inside, and further use the gap between the steel balls and the pipe wall. Contact vibration, so that impurities with low binding force are loosened from the pipe wall and washed out with gas purge; in the steel ball physical vibration step, the compressed air drives the steel ball to flow in the pipe, and at the welded parts su...

Embodiment 2

[0046] As an improvement of the present invention, in the step 7, the steam in the steam turbulence ratio is filled into the pipeline from the circumferential gas distribution port, and blows the steam at the entrance of the carbon steel pipeline to be washed at an angle of 30°~45°. It enters the inside of the pipeline and merges irregularly with the pickling liquid in the pipeline to form a turbulent flow. The advantages of this technical solution are as follows: 1) Through the action of temperature change, thermal expansion and cold contraction, the binding force of the residue in the pipeline is further reduced, so as to remove a large amount of oxide scale and slagging on the weld; Under the action of thrust, the circulation velocity of the cleaning liquid in the pipeline is increased; 3) The cleaning liquid naturally forms a turbulent state under the action of steam, so that the cleaning liquid can fully contact with the substances on the inner wall of the pipe, and the ph...

Embodiment 3

[0048] As an improvement of the present invention, in the step 4, the degreasing treatment is to pass the sodium hydroxide solution at a temperature of 50° C. to 70° C. into the carbon steel pipeline and circulate for 1 to 2 hours. The remaining steps and advantages are exactly the same as in Embodiment 1.

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Abstract

The invention relates to a method and a device for circularly flushing carbon steel pipes of a refined cooling system. The device is characterized by comprising a cleaning box, cleaning pump inlet ball valves, a cleaning pump, a cleaning pump inlet ball valve, a high-pressure air source, a matching device, a cleaning unit, a temporary stop valve, an eccentric reducing tube and a reducing tube, wherein the cleaning box is connected to the cleaning pump through a pipe; the cleaning pump inlet ball valves are arranged on pipes at two ends of the cleaning pump; the high-pressure air source and the matching device are arranged at positions close to an inlet of a cleaning pipe, so that cleaning liquid can be subjected to matching in real time, and the flowing speed and the flowing state of the cleaning liquid are adjusted; and the cleaning unit and the temporary stop valve can be selected according to the diameters of pipes, and an optimum effect can be achieved. By the eccentric reducing tube, foreign matters are prevented from being stopped and jammed, and the circumstance that the foreign matters are stored at a joint is avoided.

Description

technical field [0001] The invention relates to a pipeline flushing method, in particular to a carbon steel lubricated pipeline cleaning method for ensuring good cleanliness by treating the weld seam and the inner surface of the heat-affected area after the carbon steel pipeline is welded. Background technique [0002] Because carbon steel pipes will form a thicker oxide layer inside the pipe during the manufacturing, processing, welding and assembly process, and at the same time, some grease, dust and other particles are easy to adhere to the inner surface, these factors will directly affect the performance of the pipe Therefore, the flushing process of the pipeline system has become a very important process, and the flushing effect will also directly affect the stability of the equipment system in the future. [0003] After years of tracking and observation of on-site pipeline flushing, the relationship between foreign particles existing in the pipeline and the inner wall ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/027
CPCB08B9/027B08B9/0321B08B9/0328
Inventor 王金华苗旺徐加强董锐
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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