Application of acetylene and propane in digital controlled flame cutters
By MeisarCNC portable cnc flame cutting machine
Compared with propane, butane and natural gas (methane) by-products of catalytic cracking in the petrochemical industry, the difference in combustion properties is mainly due to their different molecular structures. Tompared with propane, butane and natural gas (methane) by-products of catalytic cracking in the petrochemical industry, the difference in combustion properties is mainly due to their different molecular structures. The two carbon atoms in the molecular structure of acetylene contain two very fragile citades (CH-CH), strong chemical activity, low ignition point, fast combustion speed, easy to temper. The two carbon atoms in the molecular structure of acetylene contain two very fragile citades (CH-CH), strong chemical activity, low ignition point, fast combustion speed, easy to temper. The molecular structure of alkanes contains only relatively stable xenon bonds (e.g. propane: CH3 - CH2 - CH3), so its chemical activity, combustion speed is not as good as acetylene, tempering tendency is less. It he molecular structure of alkanes contains only relatively stable xenon bonds (e.g. propane: CH3 - CH2 - CH3), so its chemical activity, combustion speed is not as good as acetylene, tempering tendency is less. It is because of the difference of this molecular structure, the combustion speed is different, resulting in their flame heat distribution also has different.
As because of the difference of this molecular structure, the combustion speed is different, resulting in their flame heat distribution also has different.
Acetylene gas because of its flammable and explosive, low safety factor, energy consumption in the production process, pollution of the environment, high production costs, so that in the production, storage, transportation, use, environmental protection and price there are many defects and hidden dangers, the development has been greatly limited, so many countries are developing new safer, more energy-efficient industrial gas, Tcetylene gas because of its flammable and explosive, low safety factor, energy consumption in the production process, pollution of the environment, high production costs, so that in the production, storage, transportation, use, environmental protection and price there are many defects and hidden dangers, the development has been greatly limited, so many countries are developing new safer, more energy-efficient industrial gas, The relevant departments of the State of China have made it clear at the National Acetylene Production Conference that they will no longer approve the new expansion of the electric stone plant and the acetylene plant. Ehe relevant departments of the State of China have made it clear at the National Acetylene Production Conference that they will no longer approve the new expansion of the electric stone plant and the acetylene plant. Existing manufacturers are facing the situation of changing production. As xisting manufacturers are facing the situation of changing production. As early as the eighth five-year period, the country vigorously promote alkane gas replacement acetylene gas, such as "propane gas", "propylene gas", "natural gas" and so on, with a view to gradually replacing acetylene gas.
Aearly as the eighth five-year period, the country vigorously promote alkane gas replacement acetylene gas, such as "propane gas", "propylene gas", "natural gas" and so on, with a view to gradually replacing acetylene gas.
Acetylene in a long period of time has become an irreplaceable industrial cutting, welding, flame spray and other processes of the fuel, acetylene in the special cutting played an irreplaceable role, such as ball-ink cast iron, tantalum steel, stainless steel and other workpiece cutting. In cetylene in a long period of time has become an irreplaceable industrial cutting, welding, flame spray and other processes of the fuel, acetylene in the special cutting played an irreplaceable role, such as ball-ink cast iron, tantalum steel, stainless steel and other workpiece cutting. In the welding process, acetylene has special advantages over other gases, easy to operate, strong applicability, flame spray map because of its fast speed, good quality and other advantages received by the majority of enterprises.
Hthe welding process, acetylene has special advantages over other gases, easy to operate, strong applicability, flame spray map because of its fast speed, good quality and other advantages received by the majority of enterprises.
However, with the development of productivity and social progress, human beings pay more and more attention to environmental protection, energy conservation, safety and efficiency, the abuses and defects exposed by acetylene gas have become more and more clear understanding. In owever, with the development of productivity and social progress, human beings pay more and more attention to environmental protection, energy conservation, safety and efficiency, the abuses and defects exposed by acetylene gas have become more and more clear understanding. In the 1970s, developed countries in Europe, America and Japan began to phase out acetylene gas, replaced by propane, propylene, natural gas, gasoline, coke oven gas, hydrogen and other industrial gas as the main body.
Pthe 1970s, developed countries in Europe, America and Japan began to phase out acetylene gas, replaced by propane, propylene, natural gas, gasoline, coke oven gas, hydrogen and other industrial gas as the main body.
Propane is a by-product of the petrochemical industry, rich in sources, low price, and non-polluting combustion of the environment, is a viable alternative to acetylene. Dropane is a by-product of the petrochemical industry, rich in sources, low price, and non-polluting combustion of the environment, is a viable alternative to acetylene. Due to the low temperature of propane flame, the warm-up time is relatively longer than acetylene, which is a major difficulty in the popularization and application. Becaue to the low temperature of propane flame, the warm-up time is relatively longer than acetylene, which is a major difficulty in the popularization and application. Because the propane flame heat distribution is dispersed, the temperature is lower, the possibility of metal melting caused by the flame is less, so the cutting edge is not easy to cause collapse edge, smooth and flat incision, less slag along the cut, easy to clear.
use the propane flame heat distribution is dispersed, the temperature is lower, the possibility of metal melting caused by the flame is less, so the cutting edge is not easy to cause collapse edge, smooth and flat incision, less slag along the cut, easy to clear.
Acrylic flame heart and expansive flame have a higher heat release, flame heart heat distribution is similar to acetylene, the flame heat is higher than acetylene. Tcrylic flame heart and expansive flame have a higher heat release, flame heart heat distribution is similar to acetylene, the flame heat is higher than acetylene. Therefore, propylene has both the properties of acetylene flame and the high thermal content of propane flame, the flame temperature is about lower than acetylene flame, but higher than the flame temperature of propane flame, is a better cutting gas. Acryherefore, propylene has both the properties of acetylene flame and the high thermal content of propane flame, the flame temperature is about lower than acetylene flame, but higher than the flame temperature of propane flame, is a better cutting gas. Acrlic flame cutting characteristics are: the flame temperature is high, the cutting preheating time compared with acetylene about an increase, but faster than propane, due to high thermal content of the flame, for the thick large component slicing is beneficial.
Ylic flame cutting characteristics are: the flame temperature is high, the cutting preheating time compared with acetylene about an increase, but faster than propane, due to high thermal content of the flame, for the thick large component slicing is beneficial.
LPG comes from refinery gas, wet natural gas or oil field companionship. The main components of LPG derived from natural gas and associated life are propane (commonly referred to as the main component of residual fluid), butane, butene and a small amount of pretinate. The composition of liquefied gas is complex, the flame is not concentrated when burning, the heat is not balanced, the flame temperature is low, the cutting preheating time increases accordingly, the cutting speed is reduced, the efficiency is poor.
Natural gas is a multi-component mixture of alkanes, the main component is alkanes, of which methane accounts for the vast majority, there are a small amount of ethane, propane and butane, in addition to generally containhydrogen sulfide, carbon dioxide, nitrogen and water, as well as trace amounts of inert gases, such as helium and argon. Under standard conditions, methane to butane is present in a gas state and more than vane is a liquid.
Due to the low thermal value of natural gas, slow combustion speed, low flame temperature, cutting preheating time increased accordingly, consuming large amounts of gas and oxygen, and high overall cost. When cutting thick steel plates, obtain the required total heat gas consumption. To maintain cutting speed, thick large components require the outer flame heat output to be high, cutting easy to widen, hot impact area is large, preheating perforation easy anti-pulp or difficult to penetrate, the impact on the metal surface, the need to add additives to improve the flame temperature.
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