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Welding and cutting gas and preparation method thereof

A technology for welding and cutting gas and natural gas, applied in gas fuel, petroleum industry, fuel and other directions, can solve problems such as hidden safety hazards, corrosion of steel cylinders, easy explosion, etc., and achieve the effects of cost saving, low energy consumption and simple preparation method

Inactive Publication Date: 2013-09-25
CANGXI COUNTY CHASE GAS INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the combustion value of liquefied petroleum gas, and tries to solve the safety problem of gas use to a certain extent by using additives, but the purpose is not achieved, and the following problems still exist: ① When the temperature of liquefied petroleum gas is low in winter, It cannot be fully gasified, and heating is required to completely gasify; ②The quality of welding and cutting has not reached the level of acetylene, so it cannot be completely replaced; the used persulfate, hydrogen peroxide, and potassium permanganate decompose quickly in alkaline aqueous solution , the decomposition is complete within a few hours or a few days, and has no long-term effect; ③The oxygen produced by the decomposition of the above-mentioned strong oxidant is mixed with the liquefied petroleum gas, and it is easy to explode, posing a safety hazard; ④The alkali of the strong oxidant used Non-polar aqueous solution and liquefied petroleum gas are immiscible. The former is a strong polar substance, while the latter is a non-polar substance. The polarity is very different and cannot be uniformly miscible. In the container, the upper layer is liquefied petroleum gas, and the lower layer is an aqueous solution of oxidant. , the role of additives is difficult to play, because the oxidant deposits on the bottom of the steel cylinder, it also causes corrosion to the steel cylinder, shortening the service life of the steel cylinder

Method used

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  • Welding and cutting gas and preparation method thereof
  • Welding and cutting gas and preparation method thereof
  • Welding and cutting gas and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The consumption of welding and cutting gas is 500m 3 Customers within / d can use the liquefied natural gas stored in the Dewar tank to prepare the welding and cutting gas. Since the dewar tank has its own pressurization device and gasification device, the stored liquid natural gas can be vaporized without an additional vaporizer, and then the vaporized natural gas and gain agent are mixed to form welding and cutting gas. figure 1 A schematic flow chart showing the preparation of the welding and cutting gas from the liquefied natural gas stored in the Dewar tank is shown. Such as figure 1 As shown, the gasification device of the Dewar tank is used to gasify the liquefied natural gas, and the gasified natural gas is discharged through its gas phase outlet, and the gas phase outlet is connected to the bottom of the gain agent storage tank through a hose, so that the natural gas passes through The bottom of the buff tank enters the buff tank and escapes through the liquid...

Embodiment 2

[0035] For the current acetylene plant, the welding gas can be prepared by pressurizing and gasifying the liquefied natural gas in the natural gas storage tank and mixing it with the gain agent, and then filling the welding gas into the gas cylinder and selling it to replace the original production of acetylene . figure 2A schematic flow chart showing the preparation of the welding and cutting gas by using the liquefied natural gas stored in the natural gas storage tank and filling the gas cylinder is shown. Such as figure 2 As shown, the liquefied natural gas in the natural gas storage tank is transported to the high-pressure vaporizer by the high-pressure cryogenic pump for gasification, and the outlet of the high-pressure vaporizer is connected to the mixing buffer tank through the delivery pipeline. The gain agent is injected into the delivery pipeline according to a certain proportion, and mixed with natural gas to form welding and cutting gas. The obtained welding an...

Embodiment 3

[0039] The consumption of welding and cutting gas is 1500m 3 Customers with / d and above can prepare welding and cutting gas by gasifying the liquefied natural gas in the natural gas storage tank and mixing it with a gain agent, and then adopt the centralized gas supply mode to transport the welding and cutting gas to each workshop through the main gas pipeline or working platform. image 3 A schematic flow chart showing the preparation of the welding and cutting gas by using the liquefied natural gas stored in the natural gas storage tank and performing centralized gas supply. Such as image 3 As shown, the liquefied natural gas in the natural gas storage tank is transported to the vaporizer for vaporization, and the outlet of the vaporizer is connected to the mixing buffer tank through a transmission pipeline. The gain agent is injected into the delivery pipeline according to a certain proportion, and mixed with natural gas to form welding and cutting gas. The obtained we...

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Abstract

The invention discloses a welding and cutting gas which consists of a natural gas and a gain agent, wherein the gain agent consists of a rare earth metal compound, a transition metallocene compound, methanol, toluene, methyl tertiary butyl ether, cyclohexane, nonane, decane and water. Compared with acetylene and propane, the welding and cutting gas is more economical, more energy-saving, more environment-friendly, safer and cleaner. The invention also provides a preparation method of the welding and cutting gas.

Description

technical field [0001] The invention relates to the field of industrial gas, in particular to a welding and cutting gas and a preparation method thereof. Background technique [0002] Acetylene has been used as a welding and cutting gas for a hundred years, but it is easy to form carbon deposits after welding and cutting, which is not smooth and easy to solidify near the cutting edge, so it needs to be ground again to remove carbon deposits, resulting in secondary costs. Moreover, acetylene is explosive and has a low safety factor. The production process not only consumes energy and pollutes the environment, but there are many defects and hidden dangers in the production, storage, transportation, use, environmental protection and price of acetylene. [0003] Therefore, many countries are developing new safer and more energy-saving welding and cutting gas to replace acetylene gas. Some researchers use liquefied petroleum gas as fuel, and use persulfate, hydrogen peroxide, an...

Claims

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Application Information

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IPC IPC(8): C10L3/00C10L3/10
Inventor 王理邦陈锡华董正平李茸雷亮李霞
Owner CANGXI COUNTY CHASE GAS INVESTMENT
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