CN101139535A

CN101139535A - Environment-protection energy-saving gas for welding and cutting

Info

Publication number: CN101139535A
Application number: CNA2007101656516A
Authority: CN
Inventors: 周尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-26
Filing date: 2007-10-26
Publication date: 2008-03-12
Anticipated expiration: 2027-10-26
Also published as: CN101139535B

Abstract

The invention relates to a fuel gas for welding cut that is environmental friendly and energy saving, in particular to a fuel gas that can substitute acetylene gas. The fuel gas comprises a propane gas, which is characterized in that synergist is added in certain proportion in the propane gas; the content of the propane gas is 97-99%; the content of the synergist is 5 per mill-1%, the content of the liquefiable foreign matter of gas is less than 2.5% by weight; the synergist is a mixed solution comprising combustion catalyst, smoke-removing agent, polymer degrading agent, solvent, solution assistant, and combustion assistant, etc.; the fuel gas is used as combustion gas in place of acetylene gas to weld and cut metals. The flame of the fuel gas is of high temperature, is free from reverse (return) combustion; the fuel gas is of very low explosion limit and low toxicity, free from harm to human bodies, of low comprehensive cost, high efficiency, is safe, environmental friendly and energy saving.

Description

Environment-friendly energy-saving gas for welding and cutting

Technical Field

The invention relates to an environment-friendly and energy-saving gas for welding and cutting, in particular to a gas capable of replacing acetylene gas in the metal welding and cutting process.

Background

In the machine manufacturing industry, techniques for welding and cutting metals using oxy-acetylene flames have a long history; this oxy-acetylene welding and cutting technique suffers from several drawbacks that have long been sought to be solved; for example: acetylene is used as fuel gas, which is inflammable, explosive and pollutes the environment, and has high cost and high energy consumption, and meanwhile, acetylene gas contains toxic gases such as phosphine, arsine and the like, which can cause harm to people. With the development of productivity and social progress, people pay more and more attention to environmental protection, energy conservation, safety and efficiency, and acetylene gas has various defects: high energy consumption, high pollution, easy explosion and high price.

Acetylene gas, also called acetylene gas, is a complex production process, and coke and calcium oxide are firstly smelted in an electric furnace at about 2200 ℃ to generate calcium carbide (calcium carbide); more than 3 tons of waste residues are generated when 1 ton of calcium carbide is produced, and a large amount of harmful gas and waste water are discharged simultaneously. The calcium carbide reacts with water to produce acetylene gas. The exceeding of the pressure in the process can cause explosion, and the explosion limit range is as wide as 2.4-80% (V/V). 3600 degrees of electricity consumption and one ton of multi-coke are needed for producing one ton of acetylene gas, and the direct cost of each bottle of acetylene gas is more than 50 yuan. The welding and cutting by replacing acetylene with novel industrial gas is a great trend and is a great direction determined by national policies of energy conservation and environmental protection in China.

At least 85% of all the welding and cutting gases are still using acetylene. The main problems are that: the flame temperature of propane is lower than that of acetylene, and can only reach 2600 ℃, carbon steel cannot be welded, and the cutting preheating time is long. In the 90 s of the 20 th century, additives mainly made of inorganic materials were added into propane to raise the flame temperature to 2800-2950 ℃, but the problem of welding carbon steel was not solved; and the regional distribution of the air sources is limited. Several domestic liquefied petroleum gases are added with additives, but the temperature has no obvious advantage compared with the acetylene temperature, and the performance level of completely replacing acetylene is not achieved.

The liquefied petroleum gas has poor gasification property in winter and more residual liquid, so the popularization is difficult. More serious is the hidden danger of the liquefied petroleum gas due to the complex components and different purities. A considerable part of additives contain strong oxidant hydrogen peroxide, salt and alkali components, and have a severe corrosion effect on the steel cylinder; and a part of additives contain toxic and harmful components such as benzene, toluene and xylene, naphthalene, sulfur and the like.

In recent years, people have been making efforts to research gases capable of replacing acetylene as fuel gas to improve the working environment of workers, reduce the cost and reduce the energy consumption.

Disclosure of Invention

The invention aims to provide an environment-friendly and energy-saving gas for welding and cutting, which uses propane gas to replace acetylene as gas in the mechanical manufacturing industry to weld and cut metal; the flame temperature is high, and the gas is adopted, so that the reverse combustion (backfire) phenomenon is avoided; the explosion limit is low, the toxicity is low, the harm to human bodies is avoided, the comprehensive cost is low, and the method is efficient, safe, energy-saving and environment-friendly; can obtain the effects of high efficiency, safety, environmental protection and energy saving.

The technical scheme of the invention is as follows: an environment-friendly energy-saving welding and cutting fuel gas comprises propane gas and is characterized in that a catalyst is mixed in the propane gas. The method comprises the following steps: the propane gas is characterized in that a synergist is added into the propane gas according to a certain proportion.

The content of the propane gas is as follows: 97-99 percent, and the content of the synergist is as follows: 5 per mill to 1 percent, and the content of gas impurities capable of being liquefied is less than 2.5 percent; the above refers to the total weight percentage of the fuel gas, and the following is the same.

The synergist is a mixed solution which is composed of a combustion catalyst, a smoke suppressor, a polymer degradation agent, a solvent, a cosolvent and a combustion improver according to a proportion; wherein,

combustion catalyst, smoke suppressor, polymer degradation agent, and high carbon chain ferrocene derivatives such as n-octyl ferrocene and methyl cyclopentadienyl ferrocene;

solvent, selecting tert-butyl alcohol, isopropanol, cyclohexane, cyclohexene, acetone and cyclohexanone; butanone and 200# solvent oil;

the cosolvent is selected from nontoxic propylene glycol butyl ether and a normal alkane mixture of C16-C30; 9, 11, 13-octadecatrienoic acid glyceride, terpene and turpentine;

the combustion improver is naphthenate such as magnesium naphthenate.

One of the concrete formulas of the synergist is as follows: 200# solvent oil, 30%; 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 12%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 5%.

The concrete formula of the synergist is as follows: 200# solvent oil, 35%; 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6.5%; propylene glycol butyl ether, 12%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 7%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 2%; 7% of methyl cyclopentadienyl ferrocene.

The third concrete formula of the synergist is as follows: 200# solvent oil, 30%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 8%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; 6% of n-octyl ferrocene; 0.5 percent of polymerization inhibitor; magnesium naphthenate, 3%; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 7%.

The fourth concrete formula of the synergist is as follows: 200# solvent oil, 35%; 5% of a C16-C30 normal alkane mixture; cyclohexane, 11%; propylene glycol butyl ether, 10%; turpentine, 19%; terpene, 4%; n-octyl ferrocene, 11%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 3.5%.

The fifth concrete formula of the synergist is as follows: 200# solvent oil, 33%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 7%; propylene glycol butyl ether, 13%; 6% of turpentine; terpene, 5%; 8% of n-octyl ferrocene; 1% of polymerization inhibitor; magnesium naphthenate, 10%; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 9%.

The sixth concrete formula of the synergist is as follows: 200# solvent oil, 20%; 15% of a C16-C30 normal alkane mixture; cyclohexane, 10%; propylene glycol butyl ether, 10%; 15% of turpentine; 10% of terpene; n-octyl ferrocene, 5%; 1% of polymerization inhibitor; magnesium naphthenate, 4%; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 5%.

The gas for welding and cutting has the advantages that: propane is used as base material (more than 97%), and synergist (5-1%) is added. The main medium is activated, the combustion speed is accelerated, larger heat energy is generated, the combustion temperature of flame is greatly increased, and the combustion temperature can reach about 3400 ℃. Propane-based gas may be used for underwater cutting. The synergist and the propane can be mixed with each other without dissociation and delamination, can not be decomposed and separated along with the prolonging of the standing time under the condition of full mixing, always keeps a stable state, and has uniform diffusion and uniform vaporization. The combustion efficiency of the gas-liquid mixed combustion furnace is kept as constant as one, the performance is greatly exerted, various indexes greatly exceed acetylene gas, and the effect is obvious.

Compared with acetylene, the fuel gas has very prominent safety aspect:

(1) no reverse combustion (backfire) phenomenon;

(2) the explosion limit is very low, is one thirteen times of acetylene, and is convenient for transportation, storage and use;

(3) low toxicity. Has no harm to human body.

(4) The cutting can be performed underwater.

The comprehensive cost is reduced by about 50 percent compared with acetylene, the use cost is reduced by about 20 percent compared with pure propane, and equivalent processing operation is completed. The gas consumption is about 70 percent lower than that of acetylene. One bottle of fuel gas is equivalent to 6-7 bottles of acetylene.

The heat value of the fuel gas is 1.8 times of that of acetylene, the perforation preheating time is 55 percent faster than that of acetylene, the cutting speed is 20 percent faster than that of acetylene, and the orthopedic speed is 30 percent higher than that of acetylene. The processing speed is 1/3 faster than acetylene, and the cutting seam is narrow, thereby saving raw materials, the cutting section is smooth, and the surface does not generate carbon deposition and hardening phenomena.

The flame temperature of the fuel gas can reach about 3400 ℃, and the flame temperature is higher than acetylene (about 3100 ℃).

The gas for welding and cutting has the advantages that: when the gas is used for welding and cutting metal, the flame temperature can reach more than 3420 ℃; the welding tensile strength exceeds 490 mPa; the cold bending angle can reach 180 degrees; the comprehensive gas consumption cost per unit length is lower than that of acetylene; in use, the perforation preheating time is shortened by 50 percent compared with acetylene; the cutting speed is 30% faster than acetylene; the normalizing speed of the 50mm steel beam is 1.75 times faster than that of acetylene;

the cutting performance and quality of the fuel gas are superior to acetylene, the cutting surface is smooth, the fluidity of a welding pool is good, slag is not included, no air hole is formed, and the thermal correction is not oxidized;

the fuel gas has good safety performance, and the explosion limit range is only 1/3 of acetylene; the ignition point is higher than 210 ℃ of acetylene; 1/4 with a vessel pressure of acetylene only; not tempering; has no pollution and no harm to human body in the using process.

Drawings

FIG. 1 is a block diagram of the production process of the environment-friendly and energy-saving gas for welding and cutting.

FIG. 2 is a flow chart of the production process of the additive for environment-friendly and energy-saving gas for welding and cutting.

Detailed Description

The present invention will be described in detail with reference to examples. The present invention uses propane as a substitute for acetylene cutting gas.

The safety of propane is evident compared to acetylene. The explosion limit of acetylene in air is 2.55-80%, and the explosion limit of propane is only 2.1-9.5%. The combustion rate of acetylene is 7.5 m/s, whereas propane is only 0.51 m/s and therefore does not burn back (flashback). Industrial acetylene (acetylene gas) produces harmful gases such as sulfide and phosphide when burning, while propane has high purity and only produces carbon dioxide and water when burning.

Compared with liquefied petroleum gas (the main components are propane, isobutane and n-butane), the liquefied petroleum gas has the following characteristics: (see Table 1)

TABLE 1

	Propane	Liquefied petroleum gas
	Propane	Liquefied petroleum gas	Purity (Industrial products)	97～99％	Propane, isobutane, n-butane mixture
Relative density (air 1)	1.56	1.5～2	Purity (Industrial products)	97～99％	Propane, isobutane, n-butane mixture
Relative density (air 1)	1.56	1.5～2	Boiling point of	-42.1	-44～0.57

Flash point. C	-104	-104～-67
Flash point. C	-104	-104～-67	Limit of explosion	2.1～9.5	2～10
Minimum working temperature deg.C	-42℃	About 0 DEG C	Limit of explosion	2.1～9.5	2～10
Minimum working temperature deg.C	-42℃	About 0 DEG C	Ignition temperature C	450	445～497

At present, liquefied petroleum gas is mostly used as civil fuel, the components are complex, and a plurality of indexes cannot be controlled. The gasification of the liquefied petroleum gas generates 250 times of explosive gas, and the explosive power is 4-10 times of that of TNT. As an industrial product, it is extremely difficult to use it at a temperature lower than 0 ℃ in the north. The present invention does not use liquefied petroleum gas as a base gas.

Therefore, the choice of propane as an alternative to acetylene cutting gas is the right and beneficial choice.

Regarding the synergist (or referred to as additive): organic peroxides (e.g., diacetyl peroxide) and Methylcyclopentadienyl Manganese Tricarbonyl (MMT) have been used as fuel gas additive components. However, it is reported that strong explosion may occur after 24 hours of storage after the diacetyl peroxide is prepared, the storage temperature must not exceed 25 ℃, and a 25% solution thereof is a strong oxidant, is flammable, is sensitive to shock impact, and is extremely explosive. Methylcyclopentadienyl Manganese Tricarbonyl (MMT), a burn rate catalyst, has been discontinued in 1978 in the united states because of the increased manganese content in the environment. It has also been reported that t-butyl ferrocene is selected as the main component because of its strong volatility, which affects its use.

The invention discloses a welding and cutting gas, which comprises the following components: propane gas, and a synergist is added into the propane gas. The content of the propane gas is as follows: 97-99 percent, and the content of the synergist is as follows: 5 per mill to 1 percent, and the content of gas impurities capable of being liquefied is less than 2.5 percent; the above refers to the total weight percentage of the fuel gas.

the combustion improver is naphthenate such as magnesium naphthenate.

The six synergist formulations of the present invention are shown in table 2 and table 2

	The formula is 1%	Formulation	2	Formulation 3	Formulation 4	Formulation 5	Formulation 6
	The formula is 1%	Formulation	2	Formulation 3	Formulation 4	Formulation 5	Formulation 6	200# solvent oil	30	35	30	35	33	20
Normal alkane mixture of C16-C30	8	8	7	5	7	15		200# solvent oil	30	35	30	35	33	20
Normal alkane mixture of C16-C30	8	8	7	5	7	15	Cyclohexane	6	6.5	8	11	7	10
Propylene glycol butyl ether	15	12	15	10	13	10	Cyclohexane	6	6.5	8	11	7	10
Propylene glycol butyl ether	15	12	15	10	13	10	Turpentine oil	16	16	16	19	6	15
Terpenes	4	4	4	4	5	10	Turpentine oil	16	16	16	19	6	15
Terpenes	4	4	4	4	5	10	N-octyl ferrocene	12	7	6	11	8	5
Polymerization inhibitor	0.5	0.5	0.5	0.5	1	1	N-octyl ferrocene	12	7	6	11	8	5
Polymerization inhibitor	0.5	0.5	0.5	0.5	1	1	Magnesium naphthenate			3		10	4
9, 11, 13-Octadecatrienoic acid glyceride	3.5	2	3.5	1	1	5	Magnesium naphthenate			3		10	4
9, 11, 13-Octadecatrienoic acid glyceride	3.5	2	3.5	1	1	5	Methylcyclopentadienyl ferrocene	5	7	7	3.5	9	5

Note: the percentages noted in table 2 are the total weight of the mixed solution;

one of the concrete formulas of the synergist is as follows: 200# solvent oil, 30% (the percentage of the total weight of the mixed solution is noted, the same below); 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 12%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 5%. The formula 1: more n-octyl ferrocene, higher flame temperature and less smoke quantity can degrade the polymer. Can be used for metal with higher thickness.

The concrete formula of the synergist is as follows: 200# solvent oil, 35%; 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6.5%; propylene glycol butyl ether, 12%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 7%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 2%; 7% of methyl cyclopentadienyl ferrocene. The formula is as follows: the methyl cyclopentadiene ferrocene is more, can prevent the raw materials from polymerizing, and is a better combustion-supporting catalyst and smoke abatement.

The third concrete formula of the synergist is as follows: 200# solvent oil, 30%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 8%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; 6% of n-octyl ferrocene; 0.5 percent of polymerization inhibitor; magnesium naphthenate, 3%; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 7%. The formula is as follows: magnesium naphthenate is added to assist combustion.

The fourth concrete formula of the synergist is as follows: 200# solvent oil, 35%: 5% of a C16-C30 normal alkane mixture; cyclohexane, 11%; propylene glycol butyl ether, 10%; turpentine, 19%; terpene, 4%; n-octyl ferrocene, 11%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 3.5%. The formula is as follows: the addition amount of No. 200 solvent oil and turpentine is more, so that the ferrocene derivatives can be fully dissolved.

The fifth concrete formula of the synergist is as follows: 200# solvent oil, 33%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 7%; propylene glycol butyl ether, 13%; 6% of turpentine; terpene, 5%; 8% of n-octyl ferrocene; 1% of polymerization inhibitor; magnesium naphthenate, 10%; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 9%. The formula is as follows: the polymerization inhibitor and magnesium naphthenate are more, so that unsaturated double bonds are prevented from polymerizing, and the storage time can be prolonged.

The sixth concrete formula of the synergist is as follows: 200# solvent oil, 20; 15% of a C16-C30 normal alkane mixture; cyclohexane, 10%; propylene glycol butyl ether, 10%; 15% of turpentine; 10% of terpene; n-octyl ferrocene, 5%; 1% of polymerization inhibitor; magnesium naphthenate, 4%; 9, 11, 13-octadecatrienoic acid glyceride, 5%; methylcyclopentadienyl ferrocene, 5%. The formula is as follows: 9, 11, 13-octadecyltrimethylen glyceride is more, natural products are added, the combustion temperature is increased, and the environment protection is facilitated.

The production process of the environment-friendly and energy-saving gas for welding and cutting of the invention is described below.

FIG. 1 is a flow diagram of propane gas containing a synergist. As can be seen from the figure:

the synergist is filled into a steel cylinder by a liquid filling machine, and propane is filled into the steel cylinder under pressure to prepare the synergistic fuel gas. When welding and cutting metal, gas and oxygen are mixed and combusted, and the metal is welded or cut after reaching a preset temperature.

FIG. 2 is a process flow diagram for preparing a fuel gas enhancer. (the number in the circle in the figure is the equipment number.)

The fuel gas additive consists of solid and liquid raw materials. Solid raw materials are added into a batching hopper 2 through a lifter 1 which can move on a guide rail 6, conveyed into a solid distribution groove 4 by a conveyor belt 3 and then added into a reaction kettle 5 to be mixed with liquid raw materials. The liquid raw materials are divided into two parts, one part is added into a mixing tank 11 from a storage tank 10, then added into a liquid material mixing tank 7, mixed with the other part of the liquid raw materials from a liquid feeding machine 8, stirred and added into a reaction kettle 5 to be mixed with the solid raw materials. After stirring and heating for a period of time, the mixture is cooled and then is put into a settling tank 12 for settling. Injecting the clear liquid into a centrifuge 14 by using a centrifugal pump 13 for separation, performing secondary sedimentation in a steel barrel 18, and performing vacuum filtration by using a duplex filter 15, wherein the vacuum comes from a vacuum tank 16; the final product of the gas synergist enters a finished product tank 17 for standby.

In summary, the environment-friendly and energy-saving gas for welding and cutting uses propane gas, and a synergist is added into the propane gas in proportion to replace acetylene cutting gas to weld and cut metal; has high flame temperature and no reverse combustion (backfire) phenomenon; the invention has the characteristics of low explosion limit, low toxicity, no harm to human bodies, low comprehensive cost, high efficiency, safety, environmental protection and energy saving, and achieves the aim of the invention.

All technical solutions which are the same as the inventive concept are within the scope of the claims of the present invention.

Claims

1. An environmental-friendly and energy-saving gas for welding and cutting, comprising: the propane gas is characterized in that a synergist is added into the propane gas according to a certain proportion.

2. An environment-friendly energy-saving gas for welding and cutting according to claim 1, wherein the content of propane gas is as follows: 97-99%, and the content of the synergist is as follows: 5 per mill-1%, the content of the gas impurities capable of being liquefied is less than 2.5%, and the above refers to the total weight percentage of the gas.

3. The environment-friendly energy-saving welding and cutting fuel gas as claimed in claim 2, wherein the synergist is a mixed solution of a combustion catalyst, a smoke suppressor, a polymer degradation agent, a solvent, a cosolvent and a combustion improver in proportion; wherein,

the combustion improver is naphthenate such as magnesium naphthenate.

4. The environment-friendly energy-saving gas for welding and cutting as claimed in claim 3, wherein one of the specific formulas of the synergists is as follows, the total weight percentage of the synergists is: 200# solvent oil, 30%; 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 12%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 5%.

5. The environment-friendly energy-saving welding and cutting gas as claimed in claim 3, wherein the second synergist is prepared from the following components in percentage by weight: 200# solvent oil, 35%; 8 percent of normal alkane mixture of C16-C30; cyclohexane, 6.5%; propylene glycol butyl ether, 12%; 16% of turpentine; terpene, 4%; n-octyl ferrocene, 7%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 2%; 7% of methyl cyclopentadienyl ferrocene.

6. The environment-friendly energy-saving welding and cutting gas as claimed in claim 3, wherein the third specific formula of the synergist comprises the following components in percentage by weight: 200# solvent oil, 30%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 8%; propylene glycol butyl ether, 15%; 16% of turpentine; terpene, 4%; 6% of n-octyl ferrocene; 0.5 percent of polymerization inhibitor; magnesium naphthenate, 3%; 9, 11, 13-octadecatrienoic acid glyceride, 3.5%; methylcyclopentadienyl ferrocene, 7%.

7. The environment-friendly energy-saving gas for welding and cutting as claimed in claim 3, wherein the specific formula of the synergist is four, and the synergist comprises the following components in percentage by weight: 200# solvent oil, 35%; 5% of a C16-C30 normal alkane mixture; cyclohexane, 11%; propylene glycol butyl ether, 10%; turpentine, 19%; terpene, 4%; n-octyl ferrocene, 11%; 0.5 percent of polymerization inhibitor; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 3.5%.

8. The environment-friendly energy-saving gas for welding and cutting as claimed in claim 3, wherein the concrete formula of the synergist is five, and the synergist comprises the following components in percentage by weight: 200# solvent oil, 33%; 7% of a C16-C30 normal alkane mixture; cyclohexane, 7%; propylene glycol butyl ether, 13%; 6% of turpentine; terpene, 5%; 8% of n-octyl ferrocene; 1% of polymerization inhibitor; magnesium naphthenate, 10%; 9, 11, 13-octadecatrienoic acid glyceride, 1%; methylcyclopentadienyl ferrocene, 9%.

9. The environment-friendly energy-saving gas for welding and cutting as claimed in claim 3, wherein the specific formula of the synergist is six, and the synergist comprises the following components in percentage by weight: 200# solvent oil, 20%; 15% of a C16-C30 normal alkane mixture; cyclohexane, 10%; propylene glycol butyl ether, 10%; 15% of turpentine; 10% of terpene; n-octyl ferrocene, 5%; 1% of polymerization inhibitor; magnesium naphthenate, 4%; 9, 11, 13-octadecatrienoic acid glyceride, 5%; methylcyclopentadienyl ferrocene, 5%.