Working principle of active carbon production by Snape
Activation Furnace 4 (one of
Activated Carbon Production Equipment)
What are the matters needing attention of the slap activation furnace? Summary of the experience and skills of the slap activation furnace drying
1. In the first three days, the temperature of 1, 2, 3 and 4 points is mainly increased. Because the volatile matter of the furnace charge is low and difficult to burn, the lower points of the furnace are easy to heat up, and the higher the temperature is, the more difficult it is to raise the temperature. In the following 20-25 days, the temperature of the upper points will continue to rise. The charge at 1-8 o'clock can be ignited at 550 ℃, but the combustion can be confirmed at 600-650 ℃ at 9-14 o'clock. Due to the lack of volatile matter, it is necessary to open and close the observation hole continuously for air combustion. However, at 15:00 and 16:00, because they are not in contact with the furnace charge, the volatiles and water gas extracted from the bottom are used for combustion. When the temperature reaches 550-600, cotton yarn is dipped with engine oil to ignite. If the subsequent volatile matter and water gas are not enough, it may be extinguished and need to be heated again and ignited. When the temperature of regenerator reaches 600 ℃ at 17:00 and 18:00 (regenerator), the phase change operation can be tried, and the phase change time can be adjusted step by step to continuously heat up the two half furnaces.
2. Influencing factors in Datong Area: from May to July, there was sunny and little wind in Datong area, resulting in extremely low natural pumping force of chimney, even lower than - 50pA. When the temperature rises to 7 and 8 o'clock, it is difficult to provide volatile matter and water gas to the upper part, so it is very difficult to continue heating. Therefore, when the temperature rises to above 650 ℃ at 5 and 6 points, and 550-600 ℃ at 7 and 8 points, but there is no flame, it needs to be incorporated into the incinerator, and the induced draft fan is used to provide the extraction force greater than - 70pa to continue heating.
3. During the heating process of the activation furnace, a small amount of air is provided to the furnace body to support combustion by relying on the gap of discharge port and rhythmic switch in the early stage. However, as the temperature of the upper part is gradually increased, the air is obviously insufficient. Therefore, it is necessary to open the observation holes one by one under the condition of ensuring the temperature of each point below, and then use the negative pressure to inhale air to ignite water gas and volatile matter, and then ignite the burden for heating. When the observation hole is opened, most of the rising volatile matter and water gas will be burned at this point, so the points above the opening point may be cooled or even extinguished due to the lack of volatile matter. When heated to 9 or 10 o'clock, the air may be seriously insufficient, and appropriate air blowing can be used to support combustion. However, due to the low flame temperature, if the blast is too large, it is easy to blow out the flame.
4. Each furnace has its own special high-temperature point. Generally speaking, the 1-6 points should be kept below 850 ℃, and the maximum temperature should not exceed 900 ℃. In the heating process, it is necessary to observe which points are particularly easy to reach high temperature, and steam is needed to cool or maintain the temperature. For example, the temperature of No.3 and No.4 points of No.5 boiler is easy to reach 900 ℃, and the temperature of No.1 and No.2 points is easy to be too high when steam is supplied. Therefore, steam should be continuously supplied to the four points to cool down, and a large amount of water gas can be produced for the upper part to heat up. The temperature of No.5 and No.6 of No.4 boiler is easy to reach 900 ℃, and the temperature of 3 and 4 points is easy to be too high when steam is injected into the furnace. Therefore, steam should be kept in the four points.
5. If the steam is insufficient, even if the heating trend is obvious, it is easy to make the temperature of points 1-6 too high, which may lead to overheating and damage of the furnace body, so it is necessary to carry out cooling operation. Only when the temperature of these points is in a controllable range can the upper temperature rise be continued. The specific cooling methods are as follows: (1) steam is introduced to the point where the temperature is too high for water gas reaction; 2) when the steam is insufficient or ineffective, the steam at the lower unloading hopper is opened to carry out the "steam seal" operation, which can prevent air from entering the furnace body from the discharge port, and auxiliary steam can be introduced from the lower part to cool down; 3) all the above operations are invalid When the temperature of the high temperature point is reduced or the temperature rising trend is reduced, the gate of the furnace on this side shall be closed to stop the flue pumping, so as to prevent the temperature rising. After the furnace body is completely cooled down and the temperature of the lower point is lower than 850 ℃, the ram can be opened according to the situation and continue to heat up (because the two halves of the furnace are connected by the fire channel between 1 and 2 points, if the temperature is too high, the two side RAMs can be closed at the same time Temperature reduction operation).
