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Fast microwave purging method for pipeline system

A pipeline system and microwave technology, applied in the direction of lighting and heating equipment, drying, furnace type, etc., can solve the problem of reducing water vaporization capacity, achieve the effect of improving drying depth, convenient operation, and shortening purge time

Inactive Publication Date: 2017-06-20
NANJING MCRWAVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If liquid nitrogen is used for drying, the amount of liquid nitrogen used is large, and the temperature of liquid nitrogen is lower after vaporization, which reduces the vaporization ability of water, so long-term drying is unavoidable

Method used

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  • Fast microwave purging method for pipeline system
  • Fast microwave purging method for pipeline system
  • Fast microwave purging method for pipeline system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 4 As shown, 4 carbon steel seamless pipes with an outer diameter of 108 mm and a wall thickness of 4 mm (inner diameter of 100 mm) were selected, each 6 meters long, connected together by flanges, a total of 24 meters, and the inner wall of the pipe has oxidation marks. The inner wall that has been placed in a humid outdoor environment for a certain period of time and is not completely dry. Blow with dry air, feed 1000 watts of 2450MHz microwave at the same time, install an online water analyzer at the gas outlet to measure the dew point of the outlet gas, and the blowing flow rate is 1 cubic meter per minute. The measuring range of the water analyzer is dew point -110 degrees Celsius.

[0046] Experimental steps and results:

[0047] Step 1: After continuously feeding dry air for 10 minutes, measure the dew point temperature of the outlet air at -15 degrees Celsius, and stabilize within one minute.

[0048] Step 2: Turn on the microwave power supply ...

experiment example 2

[0051] Choose 3 carbon steel seamless steel pipes with an outer diameter of 168.3 mm and a wall thickness of 7.1 mm, each of which is 9 meters long, and two elbows are added in the middle to form a U-shaped pipe.

[0052] The first step is to discharge the pipe after filling it with water, and blow it with compressed air. When no water vapor can be seen at the outlet, start to connect a water analyzer with a dew point of -110 degrees Celsius, and use dry air instead. For purging, the blowing air flow rate is 1 cubic meter per minute, and the dew point has been reduced from 15 degrees to -30 degrees for 87 minutes.

[0053] In the second step, fill the pipe with water and discharge it, and blow it with compressed air. When no water vapor can be seen at the outlet, start to connect a water analyzer with a range of dew point -110 degrees Celsius, and use the same equipment The treated dry air is purged, the blowing air flow rate is also 1 cubic meter per minute, and 1000 watts of...

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Abstract

The invention discloses a microwave rapid purging method for a pipeline system. Microwaves are fed into the interior of a metal pipeline through a microwave feeding device, and a short-circuit orifice is added in the pipeline so that the cavity inside the pipeline forms a microwave resonant cavity; The water between the blue connection surfaces and the water adsorbed on the pipe wall is rapidly vaporized under the action of microwaves, and then the vaporized water is taken out by the drying gas. The method for quickly purging petrochemical pipeline systems with higher dew point requirements provided by the present invention can shorten construction period, save energy, reduce construction cost and improve drying effect.

Description

technical field [0001] The invention belongs to the technical field of system test run and purging of petrochemical pipelines, and mainly relates to the technology of purging and drying inside the pipelines. Background technique [0002] In the chemical and petrochemical industries, there are many pipeline systems that are strictly prohibited from having residual moisture, (such as: natural gas processing, natural gas transportation, air separation, precision electronics, etc.), these moisture is usually adsorbed on the inner surface of the pipeline, even a very small amount of water It can cause process failure, lead to unqualified product quality, and even cause major safety accidents. A small amount of moisture can bring a series of adverse consequences, such as: accelerating the corrosion of pipeline equipment, clogging valves, reducing gas delivery efficiency, causing damage to compressors, and so on. [0003] According to the requirements of the specification, petroch...

Claims

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Application Information

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IPC IPC(8): F26B3/347F26B23/08
CPCF26B3/347F26B23/04
Inventor 公维生王锦勇王英军邹俊良
Owner NANJING MCRWAVE TECH CO LTD
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