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Alcohol burner. The heating temperature of the outer flame is about 600.
The heating temperature of the inner flame is about 400-600.
The heating temperature of the flame core is about 400.
Of course, if the system temperature is very low, or if the convection is particularly strong, the internal flame is relatively high, but if it is quietly burned, the outer flame is high, and the oxygen is most fully relieved.
Hope it helps you o(o
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External flame, usually used for heating, is the outer flame;
The external flame has a large contact area with oxygen, the reaction is sufficient, the oxidation is complete, and the reaction is exothermic, while the flame core has a small contact area with oxygen, and the alcohol volatilizes and absorbs heat, and the temperature is the lowest.
So what is usually said is the alcohol lamp outer flame and the inner flame flame heart.
However, studies in recent years have shown that the order of high and low flame temperature of alcohol lamp is: inner flame, outer flame and flame center. See.
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Outer flames. The internal flame does not burn completely, so less heat is released, so the temperature is lower.
The outer flame burns sufficiently, releases a lot of energy, and has a high temperature.
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Alcohol lamp temperature graph
The temperature involves the steam density and the degree of oxidation (primary), the heat loss (secondary), and the internal flame in the middle
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The order of flame temperature is: inner flame and outer flame flame center, theoretically it is generally believed that the inner flame temperature of alcohol lamp is the highest, because the outer flame is in full contact with the outside atmosphere, the energy exchange with the environment is the easiest during combustion, and the heat loss is the most, resulting in the internal flame temperature is higher than the outer flame.
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The specific temperature should be treated on a case-by-case basis.
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The contact between the outer flame and the air is more sufficient, the oxygen is more sufficient, the combustion is more complete, and the heat is released More Therefore, the temperature is higher The heating temperature of the alcohol lamp is 400-500, which is suitable for experiments where the temperature is not too high, especially when there is no gas equipment.
Alcohol lamp is a heating tool fueled by alcohol, which is widely used in laboratories, factories, medical treatment, scientific research, etc. Since it does not produce smoke during combustion, it can also be sterilized by burning the instrument.
Due to the heat generated during the combustion of the alcohol lamp, other experimental materials can be heated. Its heating temperature reaches 400-1000 or more. And it's safe and reliable.
Alcohol lamps are divided into hanging alcohol blowtorches and seated alcohol blowtorches, as well as the conventional alcohol lamps mentioned in this article.
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The blue part of the flame is cooler the closer it is to the center, and the more yellow part of the flame is hotter.
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The flame of the alcohol lamp is the highest.
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The temperature of the inner flame of the alcohol lamp is between 400 and 1000.
The flame of the alcohol lamp in normal use should be divided into three parts: the flame core, the inner flame and the outer flame. When heating, it should be heated by an external flame. The results show that the order of the flame temperature of the alcohol lamp is as follows: outer flame, inner flame, and flame center.
Theoretically, it is generally believed that the outer flame temperature of the alcohol lamp is the highest, because the outer flame is in full contact with the outside atmosphere, the energy exchange with the environment is the easiest during combustion, and the heat release is the most, resulting in the outer flame temperature is higher than the inner flame.
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For a long time, many textbooks and related manuals have believed that the outer flame temperature of the alcohol lamp is the highest, because the alcohol vapor burns most fully in the outer flame. But really, this is only one aspect; On the other hand, it is precisely because the outer flame is in full contact with the outside atmosphere that the energy exchange with the environment is frequent during combustion, and the heat loss is the largest, resulting in the temperature of the outer flame being lower than that of the inner flame.
The temperature in the center of the flame is not high because the air is relatively thin and the alcohol vapor is not fully combusted. The internal flame alcohol vapor is stable, the contact with the air is moderate, the combustion is more sufficient, the light is bright, and the temperature is the highest.
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It also depends on the alcohol concentration, generally 99% of 400 500 degrees, if 60 degrees wine only has a light blue flame.
The outer flame temperature of the alcohol lamp is 400-500, which is suitable for experiments where the temperature does not need to be too high, especially when there is no gas equipment.
The seated alcohol blowtorch used in the school laboratory is composed of a lamp tube, an air conditioner, a fire bowl, a screw cap, an alcohol storage tank and other parts. The temperature of the outer flame is about 1000, and the maximum can reach more than 1200, and every 200 ml of alcohol consumed, it can work continuously for about half an hour. Hanging alcohol blowtorches are hotter but inconvenient to use.
Gas blowtorches are warmer up to 1800 °C. However, it is generally used sparingly.
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For some students who have studied chemistry, they will not be unfamiliar with the alcohol lamp, it can be used to make a variety of experiments, and the correct method should be used when using it, but if the alcohol in the alcohol lamp runs out, many people do not know how much alcohol is best to use when adding. So how many degrees of alcohol does an alcohol lamp use? Alcohol lamp 1 alcohol lamp uses alcohol of around 95% degree.
2 Under normal circumstances, the alcohol in the alcohol lamp is 95% concentration of anhydrous alcohol, through experiments have proved that the higher the concentration of alcohol, the more sufficient the combustion, the more vigorous the ignition point, if the alcohol concentration is relatively low, then there will be a situation that the combustion is not smooth, affecting the effect. 3 Some people will want to use 75% alcohol, which is not correct, this concentration of alcohol is generally medical alcohol, mainly used for sterilization on the surface of medical equipment, if it is ignited, it will continue to collapse after combustion, and it is easy to extinguish.
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At least medical alcohol with a content of 75%.
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