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Detection apparatus of leakage point of synthetic gas in cold box for producing hydrogen and carbon monoxide

A carbon monoxide and hydrogen production technology, which is applied in the direction of liquid tightness measurement by using liquid/vacuum degree, and by measuring the increase and deceleration rate of fluid, can solve the problems of high risk, complicated process, and difficult inspection, and achieve high cost , fast analysis speed and low cost

Inactive Publication Date: 2015-07-29
SHANGHAI HUALIN IND GASES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are disadvantages such as difficult inspection, complicated process and high risk

Method used

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  • Detection apparatus of leakage point of synthetic gas in cold box for producing hydrogen and carbon monoxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is an example of the company's CAOJING2 on-site cold box elimination.

[0026] 1. An alarm signal appears on the top of the cold box, which means that there is a leak in the cold box and a gas leak has occurred.

[0027] 2. Based on experience, assume that the leak location is near the methane pipeline.

[0028] 3. Open the corresponding valve through the built-in filter 1 at position B', and at the same time start the diaphragm pump 3 to draw sample gas.

[0029] 4. The test result of the gas infrared analyzer 4 shows that the CO concentration is 568PPM. The methane concentration is 21560PPM.

[0030] 5. Based on the analysis of the test results, the leak point is very close to the gas collection point B'. In order to accurately determine the position, the gas at points A', B and C'adjacent to B'was collected and tested, and it was found that the concentration dropped significantly.

[0031] 6. The final result is that there is a leak in the methane pipeline near t...

Embodiment 2

[0033] This example is an example of eliminating leakage of the cold box of the CAOJING5 equipment at Hualin.

[0034] 1. CAOJING5 synthesizer cold box alarm sounded an alarm and gas leakage occurred.

[0035] 2. Assume that the leak point is near the built-in filter 1 at position B'.

[0036] 3. Open the corresponding valve of the built-in filter 1, and start the diaphragm pump 3 to extract the sample gas.

[0037] 4. The test result of the gas infrared analyzer 4 shows that the CH4 content is only 10100ppm.

[0038] 5. It is inferred from the result that the collection point is a certain distance from the leaking point, but the position is not accurate. From this result, the location of the leak can be roughly estimated.

[0039] 6. Then, samples A and A'were collected and tested. The gas concentration at both locations has increased significantly, reaching about 18000 ppm.

[0040] 7. Finally, according to the collected data, the location of the missing point is determined between th...

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Abstract

The invention relates to a detection apparatus of a leakage point of a synthetic gas in a cold box for producing hydrogen and carbon monoxide. The apparatus comprises built-in filters, an external filter, a diaphragm pump and a gas infrared analyzer, the built-in filters are uniformly distributed inside the cold box and are connected with the external filter through pipelines, the pipelines are provided with valves, and the external filter is successively connected with the diaphragm pump and the gas infrared analyzer. Compared to the prior art, the detection apparatus provided by the invention has the advantages of low cost, rapid determination of the leakage point, high reliability and the like.

Description

Technical field [0001] The invention relates to a device for detecting gas leakage in a cold box, in particular to a device for detecting leakage points of synthesis gas in a cold box for producing hydrogen and carbon monoxide. Background technique [0002] The hydrogen and carbon monoxide device is a hydrogen + carbon monoxide (Hydrogen+CO) production device or production process. The production and purification processes of hydrogen and carbon monoxide mainly include SMR (Steam Methane Reforming), Pox (Partial Oxidization), Gasification (gasification), cold box, PSA (Pressure Swing Adsorption), etc. [0003] In the separation process of product raw material mixed gas, cryogenic separation is a method that must be adopted in all processes. Therefore, the cold box is one of the key equipment of the hydrogen and carbon monoxide plant. The cold box is mainly composed of two parts: one is a huge steel shell incubator, and the other is an internal core aluminum plate-fin heat exchang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
Inventor 朱意成范永福王乘东谭子龙蔡建培
Owner SHANGHAI HUALIN IND GASES
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