Severe smoking from the coal furnace door due to high-pressure ammonia water
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Previously, there were dust removal vehicles; last year they were modified to use high-pressure ammonia water for coal loading. Now, smoke is emanating heavily from the furnace door. Is it a problem with the instruments or with the adjustment of the coke oven? The pressure in the coal loading duct has risen to around 300, which is causing smoke to come out of the furnace door
Whether it is a problem with the instruments or with the adjustment mechanisms, it is clearly caused by high pressure and poor instantaneous flow of gas. It is necessary to first rule out the possibility of inaccurate pressure readings from the instruments, and then consider factors such as the operation of the suction pump, the coordination of the automatic control valves, and the timing of high-pressure ammonia spray. Reducing the pressure in the gas collection pipe during coal loading will resolve the smoking issue
What is an appropriate pressure setting for the coal gas collection pipe using high-pressure ammonia water? The current value of 110 seems a bit high to me; I’m not very familiar with how coke ovens work. They are worried that if the pressure in the collection pipe is too low, negative pressure will occur in the coke oven, leading to leaks in the oven structure
The problem is that I suspect the systems manufactured by DCS manufacturers are not up to par; their adjustment capabilities are insufficient. Currently, one coke oven is emitting smoke at a moderate level, while another is producing a lot of smoke – basically, smoke is coming from each oven door
Are there also the following problems: 1. When coal is loaded, friction between the coal briquettes and the furnace walls generates a large amount of smoke, causing a sudden increase in pressure and smoking. 2. Air is drawn in through the furnace door, where it burns with the raw gas to produce high-temperature gases; this increases the volume and thus the pressure.