【Weekly Topic】20150713 What are the necessary conditions for the rapid and complete combustion of coal particles? (Participation rewards available)
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What are the necessary conditions for coal particles to burn rapidly and completely? Users who actively participate in the discussions can receive a wealth reward of 2–8 points, while those who submit excellent responses will get 1 red flower plus a wealth reward of 8–15 points! All sailors are welcome to participate actively!
The coal particles are of moderate size, with sufficient oxygen and a high enough temperature
Prerequisite: 1. A fairly high furnace temperature. 2. Appropriate air volume. 3. The size of the coal particles should be uniform.
What are the necessary conditions for coal particles to burn rapidly and completely? Conditions for the rapid and complete combustion of powder: (1) a fairly high furnace temperature ； (2) Appropriate air volume ； (3) Good mixing of coal powder and air ； (4) Sufficient combustion time.
Answer: First, the size of the coal particles should be appropriate: if they are too large, they won’t burn completely; if they are too fine, they can be blown away by the flue gases (in part)； Second is sufficient oxygen
Personal suggestions: (1) Maintain an adequate temperature inside the furnace; (2) Supply an appropriate amount of air; (3) Ensure good mixing of fuel and air; (4) Provide sufficient combustion time
1. Appropriate excess air coefficient. 2. Good perturbation, wind-coal mixing. 3. Higher burnout rate. 4. Appropriate combustion temperature.
The three elements of combustion are clearly explained. There is sufficient oxygen, and the quality of the combustible material is good.
1. An appropriate amount of air is necessary; insufficient air can lead to incomplete combustion and resulting losses. However, too much air can also lower the furnace temperature, leading to incomplete combustion. 2. A sufficiently high temperature needs to be maintained inside the furnace. Low temperatures are not conducive to the combustion reaction, resulting in incomplete combustion ； High temperatures are favorable for the combustion reaction, but they accelerate it, causing CO2 to decompose into CO; the reduction of CO2 leads to a decrease in the degree of combustion. 3. The fuel and air are well mixed. 4. Sufficient combustion time.
For coal particles to burn rapidly and completely, the following conditions are required: a small diameter of the coal particles (to provide a sufficient reaction area), thorough mixing of the coal particles with oxygen, and a high-temperature flame (to provide a sufficient ignition temperature).
Coal particles have a large specific surface area, allowing them to come into full contact with oxygen.