CN103320190B - Welding and cutting gas and preparation method thereof - Google Patents
Welding and cutting gas and preparation method thereof Download PDFInfo
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- CN103320190B CN103320190B CN201310256277.6A CN201310256277A CN103320190B CN 103320190 B CN103320190 B CN 103320190B CN 201310256277 A CN201310256277 A CN 201310256277A CN 103320190 B CN103320190 B CN 103320190B
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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
The present invention relates to industrial combustion gas field, particularly relate to a kind of cutting-welding gas and preparation method thereof.
Background technology
Acetylene uses T&B as cutting-welding gas, but easily forms carbon distribution after welding, rough, is easily set near cutting mouth, so need again to grind off carbon distribution, forms secondary cost.And acetylene is explosive, safety coefficient is low, production process had both consumed energy power consumption, again contaminate environment, make acetylene in production, store, transport, use, environmental protection and all there is many defects and hidden danger in price,
Therefore, many countries all at new safer, the more energy-conservation cutting-welding gas of development, with replaced acetylene gas.There is investigator to take liquefied petroleum gas (LPG) as fuel, prepare metal cutting gas with the alkaline aqueous solution of persulphate or hydrogen peroxide, potassium permanganate as additive.The method increase the combustion value of liquefied petroleum gas (LPG), attempt the use safety problem by using the method for additive to solve combustion gas to a certain extent, but do not reach this object, still there is following problem: 1. liquefied petroleum gas (LPG) is when temperature is lower in the winter time, all can not gasify, need heating could gasify completely; 2. welding, cutting quality do not reach the level of acetylene, can not realize substituting completely; Used persulphate or hydrogen peroxide, potassium permanganate decompose very fast in alkaline aqueous solution, namely decompose complete, do not play long-acting in several hours or several days; 3. above-mentioned strong oxidizer decomposes the oxygen that produces and liquefied petroleum gas (LPG) mixes, and easily explodes, and there is potential safety hazard; The alkaline aqueous solution of strong oxidizer 4. used and liquefied petroleum gas (LPG) can not be miscible, the former is strong polar material, the latter is apolar substance, and different polarities is very large, cannot be evenly miscible, upper strata is liquefied petroleum gas (LPG) in a reservoir, lower floor is the aqueous solution of oxygenant, and the effect of additive is difficult to play, because oxygenant is deposited on bottom of steel cylinder, also corrosion is caused to steel cylinder, shorten the working life of steel cylinder.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of efficient, safety, economy, does not pollute, and can substitute the cutting-welding gas of acetylene or propane use completely.
One aspect of the present invention provides a kind of cutting-welding gas, is made up of Sweet natural gas and accelerant, and wherein, described accelerant is by rare earth compound, and transition metal cyclopentadiene compounds, methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane and water form.
Alternatively, according to cutting-welding gas of the present invention, the accelerant containing 7-10g/m3 in described cutting-welding gas.
Alternatively, according to cutting-welding gas of the present invention, in described accelerant, described rare earth compound weight accounts for the 0.1-5% of accelerant weight.
Alternatively, according to cutting-welding gas of the present invention, described transition metal cyclopentadiene compounds weight is 1-6 times of described metal compound weight.
Alternatively, cutting-welding gas of the present invention, the mol ratio of methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane, water is 4 ~ 8:0.05 ~ 0.15:0.8 ~ 1.2:0.05 ~ 0.15:0.2 ~ 0.4:0.2 ~ 0.4:0.3 ~ 0.7.
The present invention provides a kind of preparation method of above-mentioned cutting-welding gas on the other hand, and described accelerant and Sweet natural gas are fully mixed the described cutting-welding gas of rear formation.
Alternatively, according to cutting-welding gas of the present invention, described Sweet natural gas is gasified by the liquify natural gas be stored in Dewar tank and forms, and is passed into by described Sweet natural gas, discharges from described accelerant tank top, form cutting-welding gas by accelerant tank bottom.
Alternatively, according to cutting-welding gas of the present invention, described Sweet natural gas is formed through vaporizer gasification by the liquify natural gas be stored in natural gas storage tank, is filled into by described accelerant in the pipeline carrying described Sweet natural gas, forms cutting-welding gas.
Alternatively, according to cutting-welding gas of the present invention, described liquify natural gas gasifies after high-pressure cryogenic pumps pressurization again.
Alternatively, according to cutting-welding gas of the present invention, described accelerant is directly filled in natural gas line to realize mixing with Sweet natural gas.
The preparation method of cutting-welding gas of the present invention is simple, and pollution-free, energy consumption is low, and obtained cutting-welding gas, compared with acetylene, propane, has the following advantages:
1. more economical: to use this cutting-welding gas compared with use acetylene, propane, cost-saving 30%.
2. more energy-conservation more environmental protection: producing one ton of acetylene needs consumption 3.3 tons of coke, 3 tons of water, 10800 degree of electricity, produce 3 tons of carbide slag pollutents, 1.5 tons, sewage simultaneously; Propane then cannot perfect combustion, waste fuel, and not energy-conservation, cost is wasted; And contact with oxygen after cutting-welding gas burning, most of formation water, most environmental protection, the most energy-conservation;
3. safer: the density ratio density of air of acetylene, propane is large, is easily deposited on ground pit, trench place during effusion, meeting fire will explode, and easily security incident occurs; But the density of Sweet natural gas is well below air, therefore upwards walk easily to scatter during Sweet natural gas effusion, be not easy blast, and the combustion value of Sweet natural gas is lower than the combustion value of other two kinds of gases, security is better;
4. more clean: easily to form carbon distribution after the welding of acetylene, propane, rough, be easily set near cutting mouth, so need again to grind off carbon distribution, form secondary cost, synthesizing cutting-welding gas does not then have.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet that the liquify natural gas utilizing Dewar tank storage to deposit prepares described cutting-welding gas;
Fig. 2 is that the liquify natural gas utilizing natural gas storage tank to store is prepared described cutting-welding gas and carries out the schematic flow sheet of cylinder filling;
Fig. 3 is that the liquify natural gas utilizing natural gas storage tank to store is prepared described cutting-welding gas and carries out the schematic flow sheet of central gas supply; And
Fig. 4 is the schematic flow sheet utilizing pipe natural gas to prepare described cutting-welding gas.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
The invention provides a kind of cutting-welding gas, be made up of Sweet natural gas and accelerant, wherein, described accelerant is by rare earth compound, and transition metal cyclopentadiene compounds, methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane and water form.Because heating value of natural gas is lower, the flame temperature in oxygen is only 2300 DEG C, and when using Sweet natural gas to cut, warm up time is long, and cutting speed in feet per minute is slow, therefore needs to add accelerant to improve flame temperature, improves cutting efficiency.In the present invention, carry out at the cutting-welding gas utilizing Sweet natural gas and accelerant to be mixed to get in the test of cutting, flame temperature can reach 3500 DEG C, and this cutting-welding gas body can perfect combustion, thus the carbon monoxide equal size effectively reduced in flue dust and tail gas, reduce environmental pollution.Containing 7-10g/m in cutting-welding gas of the present invention
3accelerant, be preferably 8g/m
3.
In accelerant of the present invention, rare earth compound, transition metal cyclopentadiene compounds are as catalytic combustion-supporting activeconstituents, the mixture be made up of methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane and water, as solvent, is used for dissolving described catalytic combustion-supporting activeconstituents.Described rare earth compound consumption is 0.1 ~ 5% of described accelerant weight, and the consumption of described solvent and described transition metal cyclopentadiene compounds can suitably adjust.Preferably, the consumption of described transition metal cyclopentadiene compounds is 1 ~ 6 times of described rare earth compound consumption, and all the other are solvent.When preparing described solvent, methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane, water are carried out mixing with the mol ratio of 4 ~ 8:0.05 ~ 0.15:0.8 ~ 1.2:0.05 ~ 0.15:0.2 ~ 0.4:0.2 ~ 0.4:0.3 ~ 0.7.Preferably, the mol ratio of methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane, water is 6:0.1:1:0.1:0.3:0.3:0.5.In this accelerant, catalytic combustion-supporting solubilize active ingredients also can be formed system of dissolving each other by solvent well that use, when being mixed with described accelerant by Sweet natural gas, being conducive to Sweet natural gas and they being taken out of, thus play the effect of catalytic combustion-supporting to Sweet natural gas.
In accelerant of the present invention, the rare earth compound used can be one or more in ammonium cerous sulfate, cerous nitrate and lanthanum nitrate.This several compound is cheap, using it as the raw material preparing accelerant, can reduce manufacturing cost.Described transition metal cyclopentadiene compounds is product and the derivative thereof of transition metal and cyclopentadiene chemical combination, i.e. the sandwich compound of atoms metal and two cyclopentadienyl formation or the derivative of this compound.In several embodiments of the present invention, the transition metal used is iron, one or more in nickel and cobalt.Be understandable that, the cyclopentadiene compounds of other rare earth compounds and transition metal with combustion-supporting performance also goes for the present invention.
Present invention also offers a kind of preparation method of above-mentioned cutting-welding gas, described accelerant is fully mixed with Sweet natural gas, namely obtain described cutting-welding gas.Preferably, described Sweet natural gas is the clean Sweet natural gas through dehydration, decarbonation process.
According to dissimilar client, different blending meanss can be adopted to be mixed with described accelerant by described Sweet natural gas and to prepare and use described cutting-welding gas.Prepare illustrating by four embodiments the diverse ways adopted according to customer type and use described cutting-welding gas below.
Embodiment 1
The usage quantity of cutting-welding gas is at 500m
3client in/d, the liquify natural gas that Dewar tank storage can be utilized to deposit prepares described cutting-welding gas.Because Dewar tank carries supercharging device and gasification installation, without the need to the liquify natural gas gasification that additional vaporizer can will store, then the Sweet natural gas after gasification and accelerant are mixed to form cutting-welding gas.Fig. 1 illustrates that the liquify natural gas preparation utilizing Dewar tank storage to deposit carrys out the schematic flow sheet of described cutting-welding gas.As shown in Figure 1, utilize the gasification installation of Dewar tank by liquify natural gas gasification wherein, Sweet natural gas after gasification is discharged by its gaseous phase outlet, described gaseous phase outlet arrives accelerant tank bottom by hose connection, thus make natural gas via enter in accelerant storage tank by accelerant tank bottom, then overflow through liquid accelerant.When Sweet natural gas is by described accelerant, both automatically mix and form cutting-welding gas.The cutting-welding gas formed from the top of accelerant storage tank be expelled to reduce pressure in pressure reducer after enter in mixing surge tank, in mixing surge tank, can user side be delivered to after voltage stabilizing.
The major equipment used in this programme comprises Dewar tank, accelerant storage tank, pressure reducer and mixing surge tank, and the equipment adopted is few, simple to operate, and the gas-storing capacity of every Dewar tank is 100 ~ 130m
3, for the user of life-time service acetylene or propane, the input of gas cylinder, the turnover rate of gas cylinder can be reduced.
Embodiment 2
For current acetylene factory, by welding gas by being mixed with accelerant after the liquify natural gas supercharging in natural gas storage tank also gasification, then welding gas can be filled the laggard marketing of air inlet bottle and selling, to replace original acetylene.Fig. 2 illustrates that the liquify natural gas preparation utilizing natural gas storage tank to store carrys out described cutting-welding gas and carries out the schematic flow sheet of cylinder filling.As shown in Figure 2, the liquify natural gas in natural gas storage tank is delivered in high-pressure carburetor through high-pressure cryogenic pumps and gasifies, and the outlet of high-pressure carburetor is connected with mixing surge tank by transport pipe.Accelerant is filled in described transport pipe according to a certain percentage, is mixed to form cutting-welding gas with Sweet natural gas.By the cutting-welding gas that obtains after the voltage stabilizing of mixing surge tank, be filled in gas cylinder.Owing to needing higher pressure (in this programme, the charge pressure of gas cylinder is 15MPa) during cylinder filling, therefore, utilize high-pressure cryogenic pumps delivering liquid Sweet natural gas to boost with liquid towards Sweet natural gas, then allow this liquify natural gas change gaseous state in high-pressure carburetor.
The major equipment used in this programme comprises liquefied natural gas storage tank (volume: 60m
3, 20m
3, 10m
3), high-pressure cryogenic pumps, high-pressure carburetor, accelerant adding set and mixing surge tank.Described high-pressure cryogenic pumps and accelerant adding set are overall skid-mounted equipment, and described accelerant adding set comprises under meter, volume pump, accelerant storage tank, PLC control system etc.Described accelerant adds the parameter of device according to natural-gas transfer pipeline under meter, is filled in natural gas line by PLC control system by a certain percentage by accelerant by volume pump, realizes the accurate filling of accelerant.
This programme equipment is few, production run cost is little, environmental noise is little, Operation and Maintenance is simple.
Embodiment 3
The usage quantity of cutting-welding gas is 1500m
3/ d and above client, by by after the liquify natural gas gasification in natural gas storage tank, can be mixed with accelerant and obtain cutting-welding gas, then adopt central gas supply pattern, by gas transmission main, cutting-welding gas is delivered to each workshop or workplatform.Fig. 3 illustrates that the liquify natural gas utilizing natural gas storage tank to store is prepared described cutting-welding gas and carries out the schematic flow sheet of central gas supply.As shown in Figure 3, the liquify natural gas in natural gas storage tank is delivered in vaporizer and gasifies, and the outlet of vaporizer is connected with mixing surge tank by transport pipe.Accelerant is filled in described transport pipe according to a certain percentage, is mixed to form cutting-welding gas with Sweet natural gas.The cutting-welding gas obtained is delivered to user side after the voltage stabilizing of mixing surge tank.
The major equipment used in this programme comprises liquefied natural gas storage tank (volume: 60m
3, 20m
3, 10m
3), vaporizer, accelerant adding set and mixing surge tank.Described accelerant adding set forms skid mounted equipment by under meter, dual stage volume pump, accelerant storage tank, PLC control system, pipeline, valve, liquidometer, tensimeter etc.Liquify natural gas is delivered to vaporizer, gasify the gas that through Cemented filling to user side pipeline, accelerant adds the parameter of device according to pipeline flowmeter, by PLC control system, accelerant is filled in natural gas line by volume pump by a certain percentage, form cutting-welding gas, cutting-welding gas is delivered to gas transmission main after the voltage stabilizing of mixing surge tank, then through gas transmission main, cutting-welding gas is delivered to each workshop or workplatform.This scheme is compared with acetylene, propane, and central gas supply, is convenient to management.
Embodiment 4
For the client being laid with pipe natural gas, a set of accelerant adding set can be increased on original natural gas line basis, by urban pipe network, Sweet natural gas and accelerant are mixed to get cutting-welding gas, meet and produce welding use.Fig. 4 illustrates the schematic flow sheet utilizing pipe natural gas to prepare described cutting-welding gas.As shown in Figure 4, accelerant is filled in natural gas line according to a certain percentage, is mixed to form cutting-welding gas with Sweet natural gas, described cutting-welding gas is delivered to client terminal under the voltage stabilizing of mixing surge tank.
The major equipment used in this programme comprises accelerant adding set, mixing surge tank.Described accelerant adding set is primarily of composition prying body equipment such as high-accuracy volume pump, under meter, PLC control system, pipeline, valve, liquidometer, tensimeters.Described accelerant adds the parameter of device according to natural gas line under meter, is filled in natural gas line by a certain percentage, is mixed to form cutting-welding gas with Sweet natural gas by PLC control system by accelerant by volume pump.The filling of accelerant controls the information feed back by natural gas line under meter, realizes PID fine adjustment and controls.This scheme is compared with acetylene, propane, and central gas supply, is convenient to management.
In order to illustrate better cutting-welding gas of the present invention relative to acetylene or propane the advantage on cutting efficiency and cost, applicant adopts acetylene, propane and cutting-welding gas of the present invention long to 1500mm respectively, the steel plate that 40mm is thick cuts, the effect of three compared, concrete test-results is described in table 1 below.
Table 1
As can be seen from above-mentioned table 1, with use acetylene or propane as compared with cutting gas, the cutting efficiency of cutting-welding gas of the present invention is higher, and cost is lower.
It should be noted, the present invention will be described instead of limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.
Claims (6)
1. a cutting-welding gas, is characterized in that: be made up of Sweet natural gas and accelerant, wherein, described accelerant by rare earth compound, transition metal cyclopentadiene compounds, methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane and water composition,
Wherein, 7-10g/m is contained in described cutting-welding gas
3accelerant,
In described accelerant, described rare earth compound weight accounts for the 0.1-5% of accelerant weight,
Described transition metal cyclopentadiene compounds weight is 1-6 times of described rare earth compound weight,
The mol ratio of methyl alcohol, toluene, methyl tertiary butyl ether, hexanaphthene, nonane, decane, water is 4 ~ 8:0.05 ~ 0.15:0.8 ~ 1.2:0.05 ~ 0.15:0.2 ~ 0.4:0.2 ~ 0.4:0.3 ~ 0.7.
2. a preparation method for cutting-welding gas according to claim 1, is characterized in that: described accelerant and Sweet natural gas are fully mixed the described cutting-welding gas of rear formation.
3. preparation method according to claim 2, is characterized in that: described Sweet natural gas is gasified by the liquify natural gas be stored in Dewar tank and forms, and is passed into by described Sweet natural gas, discharges from described accelerant tank top, form cutting-welding gas by accelerant tank bottom.
4. preparation method according to claim 2, is characterized in that: described Sweet natural gas is formed through vaporizer gasification by the liquify natural gas be stored in natural gas storage tank, is filled into by described accelerant in the pipeline carrying described Sweet natural gas, forms cutting-welding gas.
5. preparation method according to claim 4, is characterized in that: described liquify natural gas gasifies after high-pressure cryogenic pumps pressurization again.
6. preparation method according to claim 2, is characterized in that: described accelerant is directly filled in natural gas line to realize mixing with Sweet natural gas.
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| CN103614176A (en) * | 2013-12-16 | 2014-03-05 | 德阳恒博秸油科技有限公司 | Synergist of light alkane and preparation method thereof |
| CN104359122A (en) * | 2014-11-14 | 2015-02-18 | 高赞松 | Application of novel pipeline industrial gas in metal cutting and kiln heating |
| CN104877722B (en) * | 2015-05-07 | 2017-05-10 | 沈阳安燃科技有限公司 | Natural gas metal cutting gas |
| CN105542890B (en) * | 2015-12-16 | 2018-04-27 | 万荣县天丰达燃气有限公司 | A kind of novel natural gas synergist |
| CN107699310B (en) * | 2017-09-04 | 2018-10-02 | 巨烃新能源技术有限公司 | A kind of efficient gas combustion-supporting agent |
| CN107726048A (en) * | 2017-10-31 | 2018-02-23 | 湖南铁达能源科技有限公司 | A kind of delivery system of industry auxiliary gas |
| CN109135855B (en) * | 2017-12-07 | 2021-04-16 | 徐州华宝能源科技有限公司 | Synergistic natural gas additive and preparation method thereof |
| CN109694762A (en) * | 2019-01-11 | 2019-04-30 | 浙江纺织服装职业技术学院 | A kind of ether hydro carbons welding gas |
| CN112961719B (en) * | 2021-02-02 | 2022-03-25 | 蒲红 | Metal welding and cutting gas and preparation method thereof |
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| GB2125818A (en) * | 1982-06-26 | 1984-03-14 | Suzuki Shokan Kk | Fuel gas composition for use in cutting welding or hot working metals and glass |
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Inventor after: Wang Libang Inventor after: Chen Xihua Inventor after: Dong Zhengping Inventor after: Li Rong Inventor after: Lei Liang Inventor after: Li Xia Inventor after: Luo Jie Inventor after: Chen Nanxu Inventor before: Wang Libang Inventor before: Chen Xihua Inventor before: Dong Zhengping Inventor before: Li Rong Inventor before: Lei Liang Inventor before: Li Xia |
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Granted publication date: 20150121 Termination date: 20160625 |