Large gear ring at the bottom of the gas generator furnace
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Since we started using coal rods, dust has accumulated within the large gear ring at the bottom of the gas generator within just half a month of operation, which severely affects the performance of the furnace strip machine and creates difficulties in production. May I ask: 1. How should the dust accumulation in the large gear ring at the bottom of the furnace be dealt with after using coal rods – by water flushing or steam cleaning? How is it implemented specifically? 2. If a U-shaped water seal is to be installed, what should be its height? Is 1.5 meters okay?
Our unit uses water for flushing; specifically, inlet and outlet pipes are installed at the holes at the bottom of the furnace, and an overflow water seal is placed beneath the furnace, similar to the water seal in the gas scrubbing tower. The height of this water seal is 2.5 meters. The specific height should be determined based on the pressure inside the furnace.
1. We also experience dust falling off the large gear ring. We use 3Aд furnaces, and it is important to pay regular attention to maintaining the area where dust falls off due to the inclined plates, so as to prevent dust from accumulating there. 2. Determination of the height of the gas water seal: 1) If the maximum operating pressure is less than 3000 Pa, the effective height of the water seal is the maximum operating pressure (expressed in terms of a water column) + 150 mm, provided that this value is not less than 250 mm ； 2) If the maximum operating pressure is greater than 3000 Pa and less than 10000 Pa, the effective height of the water seal is the maximum operating pressure (expressed in terms of a water column) multiplied by 1.5 mm ； 3) If the maximum operating pressure is greater than 10,000 Pa, the effective height of the water seal is the maximum operating pressure (expressed in terms of a water column) + 500 mm.
Due to the poor mechanical strength and thermal stability of coal pellets, the amount of debris carried by the gas flowing upward and downward increases, which in turn leads to an increase in the amount of ash that enters the rotating mechanism at the bottom of the furnace. Generally, fixed-bed gas furnaces are equipped with a water seal at the bottom; it is necessary to increase the amount of water used for washing away ash, and the outlet pipe for this water should not be too narrow. The height of the water seal should be adjusted to match the air pressure generated by the fans in the system. An ash bottle about 0.5 meters in size should be added to the manual access hole at the bottom of the furnace; regular cleaning with this device can help reduce the accumulation of ash inside the furnace.
The specific height should be determined based on the pressure inside the furnace.