Box furnace slagging furnace main reason

Ash slagging itself, mainly with ash softening temperature, ash composition of various compounds (sulfur, iron content of large, low ash melting point), in which the atmosphere of ash (ash in a reducing atmosphere than low melting point, the oxidizing atmosphere) and other factors.
 Box furnace slagging external factors:1, the combustion space gas shortage;2, the fuel and air mixture is not sufficient;3, the flame deflection;4, the boiler overload operation;5, the furnace exit gas temperature increased (the lower chamber of air leakage, excessive amount of air, with the wind properly, coal and so will the flame is too rough on the move, exit gas temperature rise);6, box furnace boiler design capacity of the furnace volume heat intensity election too big. Power plant boilers, turbines, electrical, water treatment and other industries and technological exchanges thermoelectric specific analysis: You plant using low-quality bituminous coal, but look at your burner arrangement (not used classification with the wind), so I think you burning coal Although it is inferior bituminous coal, heat certainly is not high, but the ash content does not it (you did not specify ash content). Then cause the furnace slagging serious cause I speculated that it might still run to adjust the problem!Generally prevent the top box-type furnace slagging adjustment principles are: to maintain a low velocity air flow and a secondary air descending from top to bottom with the wind principles to control the burning rate, reduce the flame center position. I mention this statement and your method of adjusting the opposite; another one if it is caused by the back wall of flame center top side slagging, that both sides should try to tune the amount of wind or wind speed to be effective (which transfer large side of the air flow, depending on the inscribed circle is tangent or tangential).Cold ash hopper at the lower slagging analysis there are two possibilities: First, under the care of coal particles secondary air suction enough; if it is for this reason that it is appropriate to increase the lower secondary air, which prevents cold ash bucket Results residue, but not as you said to tone the back wall of the lower part of the hopper slagging severe cold, and opened the back wall of the lowermost two share a large secondary air), I think the key thing is to analyze the tangential way, then Press the airflow direction to reduce the back wall of the adjacent angles lower secondary upstream wind speed, while increasing the back wall an angle appropriate under secondary air; two are mixed under the direction of the back wall of the secondary air velocity is too large, causing the downstream (after wall side) a secondary air jet separation, the lower the position of the local coal combustion. The adjustment method should also be reduced back wall of an adjacent angles under the upstream secondary wind speed.