CN113249151A - LNg synergistic metal cutting gas - Google Patents
LNg synergistic metal cutting gas Download PDFInfo
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- CN113249151A CN113249151A CN202110073604.9A CN202110073604A CN113249151A CN 113249151 A CN113249151 A CN 113249151A CN 202110073604 A CN202110073604 A CN 202110073604A CN 113249151 A CN113249151 A CN 113249151A
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- Prior art keywords
- gas
- natural gas
- synergistic
- metal cutting
- lng
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- 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
- C10L3/003—Additives for gaseous fuels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
-
- 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
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- 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)
- Mechanical Engineering (AREA)
- Liquid Carbonaceous Fuels (AREA)
Abstract
The invention discloses LNg synergistic metal cutting gas, which consists of liquefied natural gas and synergistic additives: the synergistic additive is composed of 10-15% of castor oil, 10-20% of methanol, 10-20% of octanol, 4-5% of sodium alkyl sulfonate and 56-65% of 150# solvent oil; the natural gas metal cutting gas comprises the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas and 1.3-1.6 parts of synergistic additive. This kind of LNg synergy metal cutting gas, after having had energy-conserving and increase combustion efficiency's additive through adding, when having improved flame temperature, the combustion efficiency of natural gas has effectively improved, has improved the function of cutting metal, and the effect reaches comprehensively and has surpassed the corresponding level of traditional dissolved acetylene gas, and the cutting preheating rate and the cutting speed to the steel sheet have been faster about 31.9% and 21.6% respectively than with dissolved acetylene gas, and the joint cutting section is smooth moreover.
Description
Technical Field
The invention relates to the technical field of cutting, in particular to LNg synergistic metal cutting gas.
Background
At present, the industrial cutting is mainly carried out by acetylene gas, however, the raw material-calcium carbide prepared by acetylene is obtained by six times of energy conversion, the average power consumption for producing 1 ton of calcium carbide reaches 3300-3500 kWh and 1 ton of coke, and the serious pollution of the waste residue to the ecological environment becomes a social problem which is widely concerned. Acetylene gas has high energy consumption, high cost, flammability and explosiveness, seriously damages resources and pollutes the environment, and all countries actively research and develop new cutting gas and succeed, but most of the novel cutting gas influences the cutting speed and quality because of low combustion temperature, and the novel cutting gas is heavier than air and is easy to gather, so that the risk of accidents is high, and the popularization is difficult.
Natural gas is widely applied to the industrial field as a green and environment-friendly energy source, and natural gas cutting is to preheat metal at a workpiece cutting position to a certain temperature by using heat energy of natural gas combustion flame and then spray high-speed cutting oxygen flow to burn the metal at the preheating position and release heat to carry out cutting.
The natural gas has low boiling point (-161 ℃), is not influenced by the environmental temperature, does not have the gasification problem, but has lower heat value (35.32MJ/m3), the flame temperature in oxygen is only 2538 ℃, the requirement of gas cutting cannot be met, combustion-supporting additives are usually added in the prior art, the additives are mixed with the natural gas according to a certain proportion, the original cutting torch is not changed, a special cutting nozzle is matched, and the flame temperature of the natural gas is further improved, however, the existing combustion-supporting additives are various in types and unstable in performance, and cannot be well used for improving the flame temperature of the natural gas.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides LNg synergistic metal cutting gas, which has the advantage of effectively improving flame temperature by adding an energy-saving synergistic combustion-supporting additive and solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: LNg synergistic metal cutting gas is composed of liquefied natural gas and synergistic additives: the synergistic additive is composed of 10-15% of castor oil, 10-20% of methanol, 10-20% of octanol, 4-5% of sodium alkyl sulfonate and 56-65% of 150# solvent oil; the natural gas metal cutting gas comprises the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas and 1.3-1.6 parts of synergistic additive.
An LNg synergistic metal cutting gas, comprising the steps of:
the method comprises the following steps: adding the raw material components of the synergistic additive into a preparation kettle in sequence of castor oil, methanol, octanol and 150# solvent oil, uniformly stirring, then adding sodium alkylsulfonate, continuously stirring for 1 hour, standing for 8 hours, and filtering to obtain clear liquid to obtain the synergistic additive.
Step two: adding the synergistic additive into the liquefied natural gas in the LNG tank according to the formula proportion, mutually dissolving the synergistic additive and the liquefied natural gas, and standing for 10 hours to obtain the liquid-phase natural gas metal cutting gas.
Step three: the prepared liquid-phase natural gas metal cutting gas is converted into gas-phase natural gas metal cutting gas in a mode of converting liquefied natural gas into compressed natural gas, and the gas-phase natural gas metal cutting gas is obtained.
Preferably, methanol in the synergistic additive is an excellent solvent, can dissolve related components and has the function of improving the combustion efficiency; octanol not only has excellent combustion-supporting function, but also can dissolve various organic components mutually, and makes the organic components not easy to separate or generate precipitate.
Preferably, the castor oil has better functions of increasing calorific value and promoting mutual solubility; the sodium alkyl sulfonate has the functions of promoting the uniform mixing of all components, promoting the rapid uniform mixing of welding and cutting fuel gas and oxygen and improving the combustion efficiency.
Preferably, the natural gas metal cutting gas can be liquefied natural gas low-temperature steel cylinders or gasified and then compressed to compressed natural gas steel cylinders, and the natural gas metal cutting gas is sent to a station for use and can be used in a gas supply mode through a pipeline.
Compared with the prior art, the invention has the following beneficial effects:
1. the LNg synergistic metal cutting gas is prepared by adding additive with energy saving and combustion efficiency increasing effects, the combustion efficiency of natural gas is effectively improved while the flame temperature is improved, the function of cutting metal is further improved, the effect comprehensively reaches and exceeds the corresponding level of the traditional dissolved acetylene gas, the cutting preheating speed and the cutting speed of the steel plate are respectively 31.9 percent and 21.6 percent faster than that of dissolved acetylene gas, the section of the cutting seam is smooth, meanwhile, the natural gas cutting gas has the characteristics of safety, cleanness and environmental protection, contains few sulfides and phosphide, can obviously reduce the use amount of natural gas and oxygen, can greatly save energy by more than 70 percent in the preparation and use of raw materials, greatly reduce the discharge of three wastes by more than 50 percent, the additive has important significance on environmental protection, and the added synergistic additive also has the effect of slowing down the scouring and abrasion of natural gas to the nozzle orifice of the welding nozzle.
2. This kind of LNg increase metal cutting gas, it is safe in utilization, do not temper when the cutting uses, cutting gas specific gravity is lower than the air moreover, can carry out indoor work, and the natural gas belongs to clean energy, and the price is low, and the purchase is convenient, makes things convenient for the manufacturing personnel to collect and make, has improved the utilization ratio to the natural gas.
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: LNg synergistic metal cutting gas is composed of liquefied natural gas and synergistic additives: the synergistic additive consists of 10-15% of castor oil, 10-20% of methanol, 10-20% of octanol, 4-5% of alkyl sodium sulfonate and 56-65% of 150# solvent oil; the natural gas metal cutting gas consists of the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas and 1.3-1.6 parts of synergistic additive.
An LNg synergistic metal cutting gas, comprising the steps of:
the method comprises the following steps: adding the raw material components of the synergistic additive into a preparation kettle in sequence of castor oil, methanol, octanol and 150# solvent oil, uniformly stirring, then adding sodium alkylsulfonate, continuously stirring for 1 hour, standing for 8 hours, and filtering to obtain clear liquid to obtain the synergistic additive.
Step two: adding the synergistic additive into the liquefied natural gas in the LNG tank according to the formula proportion, mutually dissolving the synergistic additive and the liquefied natural gas, and standing for 10 hours to obtain the liquid-phase natural gas metal cutting gas.
Step three: the prepared liquid-phase natural gas metal cutting gas is converted into gas-phase natural gas metal cutting gas in a mode of converting liquefied natural gas into compressed natural gas, and the gas-phase natural gas metal cutting gas is obtained.
After the additive with the functions of saving energy and increasing the combustion efficiency is added, the flame temperature is improved, the combustion efficiency of natural gas is effectively improved, the function of cutting metal is further improved, the effect comprehensively reaches and exceeds the corresponding level of the traditional dissolved acetylene gas, the cutting preheating speed and the cutting speed of the steel plate are respectively 31.9 percent and 21.6 percent faster than those of the dissolved acetylene gas, and the section of a cutting seam is smooth.
Wherein, methanol in the synergistic additive is an excellent solvent, can dissolve related components and has the function of improving the combustion efficiency; octanol not only has excellent combustion-supporting function, but also can dissolve various organic components mutually, and makes the organic components not easy to be layered or generate precipitates, so that the components of the synergistic additive can be uniformly mixed, and the effect in actual use is improved.
Wherein, the castor oil has better functions of increasing calorific value and promoting intersolubility; the sodium alkyl sulfonate has the functions of promoting the uniform mixing of all components, promoting the rapid uniform mixing of welding and cutting fuel gas and oxygen and improving the combustion efficiency.
The natural gas cutting gas has the characteristics of safety, cleanness and environmental protection, contains few sulfides and phosphide, can obviously reduce the use amount of natural gas and oxygen, can greatly save energy by more than 70 percent in the preparation and use of raw materials, greatly reduces the emission of three wastes by more than 50 percent, has important significance on environmental protection, and the added synergistic additive also has the function of slowing down the scouring and abrasion of the natural gas to a nozzle of a welding nozzle.
The natural gas metal cutting gas can be compressed to a compressed natural gas steel cylinder after being gasified or being used by a liquefied natural gas low-temperature steel cylinder and being sent to a station, and can also be used in a way of supplying gas through a pipeline.
Wherein, this kind of natural gas cutting gas is safe in utilization, does not temper when the cutting uses, and the cutting gas specific gravity is lower than the air moreover, can carry out indoor work, and the natural gas belongs to clean energy, and the price is low, and the purchase is convenient, makes things convenient for the manufacturing personnel to collect and make, has improved the utilization ratio to the natural gas.
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. An LNg synergistic metal cutting gas, which is characterized in that: the natural gas additive consists of liquefied natural gas and a synergistic additive: the synergistic additive is composed of 10-15% of castor oil, 10-20% of methanol, 10-20% of octanol, 4-5% of sodium alkyl sulfonate and 56-65% of 150# solvent oil; the natural gas metal cutting gas comprises the following components in parts by weight: 98.4-98.7 parts of liquefied natural gas and 1.3-1.6 parts of synergistic additive.
2. The LNg synergistic metal cutting gas as claimed in claim 1, wherein: the method comprises the following steps:
the method comprises the following steps: adding the raw material components of the synergistic additive into a preparation kettle in sequence of castor oil, methanol, octanol and 150# solvent oil, uniformly stirring, then adding sodium alkylsulfonate, continuously stirring for 1 hour, standing for 8 hours, and filtering to obtain clear liquid to obtain the synergistic additive.
Step two: adding the synergistic additive into the liquefied natural gas in the LNG tank according to the formula proportion, mutually dissolving the synergistic additive and the liquefied natural gas, and standing for 10 hours to obtain the liquid-phase natural gas metal cutting gas.
Step three: the prepared liquid-phase natural gas metal cutting gas is converted into gas-phase natural gas metal cutting gas in a mode of converting liquefied natural gas into compressed natural gas, and the gas-phase natural gas metal cutting gas is obtained.
3. The LNg synergistic metal cutting gas as claimed in claim 1, wherein: methanol in the synergistic additive is an excellent solvent, can dissolve related components and has the function of improving combustion efficiency; octanol not only has excellent combustion-supporting function, but also can dissolve various organic components mutually, and makes the organic components not easy to separate or generate precipitate.
4. The LNg synergistic metal cutting gas as claimed in claim 1, wherein: the castor oil has good functions of increasing calorific value and promoting mutual solubility; the sodium alkyl sulfonate has the functions of promoting the uniform mixing of all components, promoting the rapid uniform mixing of welding and cutting fuel gas and oxygen and improving the combustion efficiency.
5. The LNg synergistic metal cutting gas as claimed in claim 1, wherein: the natural gas metal cutting gas can be compressed into a compressed natural gas steel cylinder by using a liquefied natural gas low-temperature steel cylinder or gasifying the natural gas metal cutting gas, is sent to a station for use, and can be used in a pipeline gas supply mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110073604.9A CN113249151A (en) | 2021-01-20 | 2021-01-20 | LNg synergistic metal cutting gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110073604.9A CN113249151A (en) | 2021-01-20 | 2021-01-20 | LNg synergistic metal cutting gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113249151A true CN113249151A (en) | 2021-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110073604.9A Pending CN113249151A (en) | 2021-01-20 | 2021-01-20 | LNg synergistic metal cutting gas |
Country Status (1)
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| CN (1) | CN113249151A (en) |
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2021
- 2021-01-20 CN CN202110073604.9A patent/CN113249151A/en active Pending
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