CN114015485A - Natural gas metal welding and cutting gas - Google Patents
Natural gas metal welding and cutting gas Download PDFInfo
- Publication number
- CN114015485A CN114015485A CN202110055991.3A CN202110055991A CN114015485A CN 114015485 A CN114015485 A CN 114015485A CN 202110055991 A CN202110055991 A CN 202110055991A CN 114015485 A CN114015485 A CN 114015485A
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- China
- Prior art keywords
- natural gas
- cutting
- gas
- solution
- combustion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000003345 natural gas Substances 0.000 title claims abstract description 50
- 238000005520 cutting process Methods 0.000 title claims abstract description 47
- 239000007789 gas Substances 0.000 title claims abstract description 31
- 238000004021 metal welding Methods 0.000 title claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000003466 welding Methods 0.000 claims abstract description 27
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims abstract description 22
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 22
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 22
- 239000003949 liquefied natural gas Substances 0.000 claims abstract description 13
- 239000003502 gasoline Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical group O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 44
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- HSFWRNGVRCDJHI-UHFFFAOYSA-N Acetylene Chemical compound C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 10
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000002195 synergetic effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/04—Organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
Abstract
The invention discloses a natural gas metal welding and cutting gas, which consists of liquefied natural gas, dimethyl ether and a combustion improver; the additive is composed of 99% -99.9% of solvent and 0.1% -1% of solute, wherein the solvent is gasoline, and the solute is cerium dioxide and sodium oleate. The rare earth combustion improver is simple in composition and is a neutral organic solution, the rare earth combustion improver has no corrosivity on metal equipment, potential safety hazards caused by equipment corrosion after long-term use are avoided, the rare earth combustion improver has a catalytic combustion-supporting effect after being uniformly mixed with natural gas, the natural gas is fully combusted, the combustion flame temperature can be increased to 3100 and 3400 ℃, the cutting speed and the welding speed can be increased when natural gas flame is cut, the consumption of the natural gas is reduced, and meanwhile, the gas flame temperature when the natural gas is combusted is increased by using the rare earth combustion improver, and the combustion speed and the cutting speed and the welding speed are increased.
Description
Technical Field
The invention relates to the technical field of metal welding and cutting, in particular to natural gas metal welding and cutting fuel gas.
Background
The processing of metal materials is an indispensable technical means for modern social and economic development and modern life. Acetylene has a high combustion temperature, is convenient to obtain, and has a good use effect, so that acetylene is widely used as fuel gas for welding and cutting in metal processing.
However, in continuous exploration, natural gas is found to be used for cutting operation, and natural gas cutting and welding are performed by preheating metal at a cutting part of a workpiece to a certain temperature by using heat energy of natural gas combustion flame, spraying high-speed oxygen flow to burn the metal at the preheating part, and releasing heat to perform cutting and welding.
However, the existing natural gas cannot reach an ideal temperature for cutting and welding when in use, so that a large amount of time is wasted, a combustion-supporting additive needs to be added for use, the existing combustion-supporting additive is various in types and unstable in performance, meanwhile, the problem still exists in metal welding, particularly in welding of ferrous metal steel with a higher melting point, and compared with dissolved acetylene, the gap still exists in welding quality.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the natural gas metal welding and cutting gas which has the advantages of stable combustion improver performance, effective cutting and capability of welding metal with higher melting point, and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a natural gas metal welding and cutting gas is composed of liquefied natural gas, dimethyl ether and combustion improver; the additive is composed of 99% -99.9% of solvent and 0.1% -1% of solute, the solvent is gasoline, and the solute is cerium dioxide and sodium oleate; the natural gas metal welding and cutting gas consists of the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas, 0.5-0.8 part of dimethyl ether and 1.3-1.6 parts of synergistic additive.
A natural gas metal welding and cutting gas comprises the following steps;
the method comprises the following steps: mixing the sodium oleate solution and the gasoline in proportion, and uniformly stirring; adding a cerium chloride solution into the mixed solution, and reacting at 45-65 ℃ for 40-60 min; adding sodium hydroxide solution into the reacted liquid, and reacting at 45-65 ℃ for 40-60 min; adding hydrogen peroxide into the reacted liquid, and reacting for 20-40min at 45-65 ℃; transferring the reacted solution into a high-temperature high-pressure reaction kettle, and reacting for 15-20h at the temperature of 160-; the reaction pressure was 826-1844 kPa; after the reaction is finished, carrying out oil-water separation on the liquid in the high-temperature high-pressure reaction kettle, wherein the obtained oil phase solution is a rare earth combustion improver for natural gas combustion.
Step two: adding dimethyl ether and liquefied natural gas into a reaction kettle according to the formula proportion, and mixing and stirring uniformly for later use.
Step three: and (3) adding the rare earth combustion improver prepared in the step one into the mixture of the dimethyl ether and the liquefied natural gas in the step two to obtain the metal welding and cutting gas.
Preferably, the concentration of the sodium oleate solution is 0.15-0.6mol/L, the volume ratio of the sodium oleate solution to the gasoline is 1:2.5, and the concentration of the cerium chloride solution is 0.1-0.4 mol/L.
Preferably, the volume ratio of the cerium chloride solution to the sodium oleate solution is 1:2, the concentration of the sodium hydroxide solution is 0.4-1.6mol/L, the volume ratio of the sodium hydroxide solution to the sodium oleate solution is 1:1, and the volume ratio of the hydrogen peroxide to the sodium oleate solution is 1: 80-160.
Preferably, the rare earth combustion improver has the advantages of improving the gas flame temperature during the combustion of natural gas, accelerating the combustion speed, the cutting speed and the welding speed, has no corrosivity, and can be well used for the welding and cutting of the natural gas.
Compared with the prior art, the invention has the following beneficial effects:
1. the rare earth combustion improver is simple in composition and is a neutral organic solution, the corrosion to metal equipment is avoided, potential safety hazards caused by equipment corrosion after long-term use are avoided, the rare earth combustion improver has a catalytic combustion supporting effect after being uniformly mixed with natural gas, the natural gas is fully combusted, the combustion flame temperature can be increased to 3100 and 3400 ℃, the cutting speed and the welding speed can be increased when natural gas flame is cut, the consumption of the natural gas is reduced, the cost is reduced, energy is saved, emission is reduced, the gas flame temperature when the natural gas is combusted is increased by using the rare earth combustion improver, the combustion speed and the cutting speed and the welding speed are increased, and the effect which cannot be achieved by the conventional natural gas combustion improver is effectively solved.
2. The natural gas metal welding and cutting gas comprehensively achieves and exceeds the corresponding level of the traditional dissolved acetylene gas by the functions and effects of the natural gas cutting metal and the welding metal added with the rare earth combustion improver and the dimethyl ether, the cutting preheating speed and the cutting speed of a steel plate are respectively 31.9 percent and 21.6 percent faster than those of the dissolved acetylene gas, and the section of a cut is smooth; the welding speed of the thin steel plate is about 38.8 percent higher than that of dissolved acetylene gas, the welding seam quality is good, and the rare earth combustion improver has the characteristics of safety, cleanness and environmental protection, and can also reduce the scouring and abrasion of dimethyl ether on the nozzle of the welding nozzle.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a natural gas metal welding and cutting gas is composed of liquefied natural gas, dimethyl ether and combustion improver; the additive is composed of 99% -99.9% of solvent and 0.1% -1% of solute, wherein the solvent is gasoline, and the solute is cerium dioxide and sodium oleate; the natural gas metal welding and cutting gas consists of the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas, 0.5-0.8 part of dimethyl ether and 1.3-1.6 parts of synergistic additive.
A natural gas metal welding and cutting gas comprises the following steps;
the method comprises the following steps: mixing the sodium oleate solution and the gasoline in proportion, and uniformly stirring; adding a cerium chloride solution into the mixed solution, and reacting at 45-65 ℃ for 40-60 min; adding sodium hydroxide solution into the reacted liquid, and reacting at 45-65 ℃ for 40-60 min; adding hydrogen peroxide into the reacted liquid, and reacting for 20-40min at 45-65 ℃; transferring the reacted solution into a high-temperature high-pressure reaction kettle, and reacting for 15-20h at the temperature of 160-; the reaction pressure was 826-1844 kPa; after the reaction is finished, carrying out oil-water separation on the liquid in the high-temperature high-pressure reaction kettle, wherein the obtained oil phase solution is a rare earth combustion improver for natural gas combustion.
Step two: adding dimethyl ether and liquefied natural gas into a reaction kettle according to the formula proportion, and mixing and stirring uniformly for later use.
Step three: and (3) adding the rare earth combustion improver prepared in the step one into the mixture of the dimethyl ether and the liquefied natural gas in the step two to obtain the metal welding and cutting gas.
Wherein the concentration of the sodium oleate solution is 0.15-0.6mol/L, the volume ratio of the sodium oleate solution to the gasoline is 1:2.5, and the concentration of the cerium chloride solution is 0.1-0.4 mol/L.
Wherein the volume ratio of the cerium chloride solution to the sodium oleate solution is 1:2, the concentration of the sodium hydroxide solution is 0.4-1.6mol/L, the volume ratio of the sodium hydroxide solution to the sodium oleate solution is 1:1, and the volume ratio of the hydrogen peroxide to the sodium oleate solution is 1: 80-160.
The rare earth combustion improver is a natural gas combustion improver and is simple in component, is a neutral organic solution, has no corrosion to metal equipment, avoids potential safety hazards caused by equipment corrosion after long-term use, has a catalytic combustion supporting effect after being uniformly mixed with natural gas, is beneficial to full combustion of the natural gas, can increase the combustion flame temperature to 3100 and 3400 ℃, can accelerate the cutting speed and the welding speed when the natural gas is subjected to flame cutting, reduces the consumption of the natural gas, is beneficial to reducing the cost and energy conservation and emission reduction, and can improve the gas flame temperature when the natural gas is combusted, accelerate the combustion speed and the cutting speed and the welding speed by using the rare earth combustion improver, thereby effectively solving the problem that the existing combustion improver cannot achieve the effect.
The rare earth combustion improver has the advantages of improving the gas flame temperature during the combustion of natural gas, accelerating the combustion speed, the cutting speed and the welding speed, having no corrosivity, and being well used for the welding and cutting of the natural gas.
The functions and effects of natural gas cutting metal and welding metal added with rare earth combustion improver and dimethyl ether comprehensively reach and exceed the corresponding level of the traditional dissolved acetylene gas, the cutting preheating speed and the cutting speed of the steel plate are about 31.9 percent and 21.6 percent faster than those of the dissolved acetylene gas, and the section of a cut is smooth; the welding speed of the thin steel plate is about 38.8 percent higher than that of dissolved acetylene gas, the welding seam quality is good, and the rare earth combustion improver has the characteristics of safety, cleanness and environmental protection, and can also reduce the scouring and abrasion of dimethyl ether on the nozzle of the welding nozzle.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a natural gas metal welding gas which characterized in that: is composed of liquefied natural gas, dimethyl ether and combustion improver; the additive is composed of 99% -99.9% of solvent and 0.1% -1% of solute, the solvent is gasoline, and the solute is cerium dioxide and sodium oleate; the natural gas metal welding and cutting gas consists of the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas, 0.5-0.8 part of dimethyl ether and 1.3-1.6 parts of synergistic additive.
2. The natural gas metal welding and cutting gas as claimed in claim 1, wherein: comprises the following steps;
the method comprises the following steps: mixing the sodium oleate solution and the gasoline in proportion, and uniformly stirring; adding a cerium chloride solution into the mixed solution, and reacting at 45-65 ℃ for 40-60 min; adding sodium hydroxide solution into the reacted liquid, and reacting at 45-65 ℃ for 40-60 min; adding hydrogen peroxide into the reacted liquid, and reacting for 20-40min at 45-65 ℃; transferring the reacted solution into a high-temperature high-pressure reaction kettle, and reacting for 15-20h at the temperature of 160-; the reaction pressure was 826-1844 kPa; after the reaction is finished, carrying out oil-water separation on the liquid in the high-temperature high-pressure reaction kettle, wherein the obtained oil phase solution is a rare earth combustion improver for natural gas combustion.
Step two: adding dimethyl ether and liquefied natural gas into a reaction kettle according to the formula proportion, and mixing and stirring uniformly for later use.
Step three: and (3) adding the rare earth combustion improver prepared in the step one into the mixture of the dimethyl ether and the liquefied natural gas in the step two to obtain the metal welding and cutting gas.
3. The natural gas metal welding and cutting gas as claimed in claim 1, wherein: the concentration of the sodium oleate solution is 0.15-0.6mol/L, the volume ratio of the sodium oleate solution to the gasoline is 1:2.5, and the concentration of the cerium chloride solution is 0.1-0.4 mol/L.
4. The natural gas metal welding and cutting gas as claimed in claim 1, wherein: the volume ratio of the cerium chloride solution to the sodium oleate solution is 1:2, the concentration of the sodium hydroxide solution is 0.4-1.6mol/L, the volume ratio of the sodium hydroxide solution to the sodium oleate solution is 1:1, and the volume ratio of the hydrogen peroxide to the sodium oleate solution is 1: 80-160.
5. The natural gas metal welding and cutting gas as claimed in claim 1, wherein: the rare earth combustion improver has the advantages of improving the gas flame temperature during the combustion of natural gas, accelerating the combustion speed, the cutting speed and the welding speed, has no corrosivity, and can be well used for the welding and cutting of the natural gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110055991.3A CN114015485A (en) | 2021-01-15 | 2021-01-15 | Natural gas metal welding and cutting gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110055991.3A CN114015485A (en) | 2021-01-15 | 2021-01-15 | Natural gas metal welding and cutting gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114015485A true CN114015485A (en) | 2022-02-08 |
Family
ID=80053901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110055991.3A Pending CN114015485A (en) | 2021-01-15 | 2021-01-15 | Natural gas metal welding and cutting gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114015485A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8317257D0 (en) * | 1982-06-26 | 1983-07-27 | Suzuki Shokan Kk | Fuel gas composition |
| CN101220306A (en) * | 2007-01-12 | 2008-07-16 | 上海联翔置业有限公司 | Mix pipeline gas and dispensing method thereof |
| CN108707493A (en) * | 2018-05-25 | 2018-10-26 | 包头稀土研究院 | Rare earth combustion adjuvant and preparation method thereof for combustion of natural gas |
-
2021
- 2021-01-15 CN CN202110055991.3A patent/CN114015485A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8317257D0 (en) * | 1982-06-26 | 1983-07-27 | Suzuki Shokan Kk | Fuel gas composition |
| CN101220306A (en) * | 2007-01-12 | 2008-07-16 | 上海联翔置业有限公司 | Mix pipeline gas and dispensing method thereof |
| CN108707493A (en) * | 2018-05-25 | 2018-10-26 | 包头稀土研究院 | Rare earth combustion adjuvant and preparation method thereof for combustion of natural gas |
Non-Patent Citations (2)
| Title |
|---|
| 朱盛镭主编: "《新能源汽车产业》", 30 June 2014, 上海：上海科学技术文献出版社, pages: 178 * |
| 陈允;: "天然气用于金属氧气切割的局限与解决方法", 煤气与热力, no. 07, 15 July 2015 (2015-07-15) * |
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