Holes and small cracks were found at the horizontal and vertical mortar joints of the refractory bricks A and B bricks and the lower F1, F2 and F3 bricks. After removing the tile facing the fire, it was found that pores existed in the back seam of the backing brick, and there were many black powders (pulverized coal after analysis). After the refractory castable was removed from the A brick, there were many white powders in the expansion joint of 30 mm (which was formed after the refractory fibers were burned) and black powder (pulverized coal). Some of the castables removed were white, fine and fine, and some were black, coarse, and porous. The black castable loses weight when burned and its color turns white. It is the same substance as the white castable. The burning substance is pulverized coal.
From the current investigation, we know that there are many coal powders in the mortar joints, expansion joints and in the refractory castables. They are all derived from the gas in the dome combustion chamber. Here we discuss issues such as the power of radon, the formation of radon passages, and the cause of the increase in wall temperature. The power of helium for helium comes from the pressure difference of the gas, that is, the gas is pumped from the higher pressure area into the lower pressure area. The gas pressure in the dome combustion chamber is higher than the gas pressure in the expansion joint, and the pressure in the dome combustion chamber must be specifically analyzed.
When the speed of the high-pressure coal slurry pump is 1100r/min, the volumetric flow rate of the coal slurry injected into the gasifier is 23m3/h, the corresponding oxygen flow rate is 11370m3/h, the pressure is 3.8MPa, and this stream enters the gasifier Afterwards, it brought great momentum. Its direction was from top to bottom. It must be passed on to the gas near the nozzles of the process burner to increase the momentum of the gas of volume V.
This classification including Hot Dip Galvanized Square Steel Pipe, usually they are used for construction purpose, also some customer use them for car , billboard, stents, fence etc.
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