Method for eliminating W and U type pipeline air jam

A pipeline gas, U-shaped technology, applied in lighting and heating equipment, cleaning heat transfer devices, flushing, etc., can solve the problems of easy formation of air locks, pipeline blockages, difficult dredging, etc., and achieve the effect of eliminating air locks

Active Publication Date: 2015-04-08
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] 1) In the process of chemical cleaning of W-shaped and U-shaped pipes and direct water supply, air locks are easily formed in W-shaped and U-shaped pipes;
[0004] 2) If air locks are generated in the early stage of chemical cleaning of W-shaped and U-shaped pipelines, it will be more complicated to take dredging measures in the later stage and it is not easy to dredge;
[0005] 3) Air locks are generated during the water supply process, which causes some pipes to be blocked during the chemical cleaning process, resulting in pipe bursts when starting the machine

Method used

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Embodiment Construction

[0021] The present invention will be described in further detail below in combination with specific embodiments.

[0022] A kind of W-type and U-type pipeline air block eliminating method of the present invention is characterized in that: comprise the following steps:

[0023] Step 1: Connect the two ends of the inlet and outlet pipes of the system connecting the W-shaped and U-shaped pipes to the temporary pipes, and use temporary valves to isolate and seal the two ends of the W-shaped and U-shaped pipes;

[0024] Step 2: Set air extraction holes and inflation holes on the temporary pipelines at both ends of the isolation and sealing section of the W-shaped and U-shaped pipelines, and connect them to the vacuum pump and the inflation gas source respectively;

[0025] Step 3: Use a vacuum pump to evacuate the isolation and sealing sections of the W-shaped and U-shaped pipelines, continue to pump air and flush the soluble gas X, and repeat the operation until all the pipe secti...

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Abstract

The invention discloses a method for eliminating W and U type pipeline air jam. The method comprises the steps that 1, the two ends of a system inlet and outlet pipe connected with a W and U type pipeline are connected with temporary pipelines respectively, and the two ends of the W and U type pipeline are isolated and sealed through temporary valves; 2, an air exhaust hole and an air inflation hole are formed in the temporary pipelines at the two ends of the isolation sealing segment of the W and U type pipeline, and are connected with a vacuum pump and an inflation source respectively; 3, the vacuum pump is adopted to carry out vacuumizing on the isolation sealing segment of the W and U type pipeline, air exhausting is continuously kept, soluble gas X is inflated, repeated operation is carried out, and the air source is closed until the interior of the isolation sealing segment of the W and U type pipeline is completely replaced by the inflated soluble gas X; and 4, the temporary valve at one end of the W and U type pipeline is opened, aqueous solutions slowly enter the pipeline, the inflated soluble gas can be completely dissolved in the solutions, and no new gas is generated. The problem that the air jam is generated in the earlier stage that the W and U type pipeline is chemically cleaned is solved, and the guarantee is provided for smooth operation of subsequent chemical cleaning, the cleaning effect and normal starting and running of a power station.

Description

technical field [0001] The invention relates to the technical field of cleaning W-shaped and U-shaped pipelines, in particular to a method for eliminating air plugs in W-shaped and U-shaped pipelines. Background technique [0002] After the W-shaped and U-shaped heat exchange pipes (such as superheaters, reheaters, etc.) have been running for a certain period of time, chemical cleaning is required to remove the scale (mainly iron oxides) generated on the heat exchange surface during operation to improve the performance of the boiler. Thermal efficiency and reduced risk of scaling. In the early stage of chemical cleaning of W-shaped and U-shaped pipelines, water is usually used for direct flushing. These methods have the following disadvantages: [0003] 1) In the process of chemical cleaning of W-shaped and U-shaped pipes and direct water supply, air locks are easily formed in W-shaped and U-shaped pipes; [0004] 2) If air locks are generated in the early stage of chemica...

Claims

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Application Information

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IPC IPC(8): F28G9/00
Inventor 曹杰玉宋飞邓宇强龙国军姚建涛刘锋张祥金文慧峰倪瑞涛
Owner XIAN THERMAL POWER RES INST CO LTD
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