锅炉（boiler）.doc

锅炉（boiler） Why should the water level be kept within normal range when the boiler is running? Answer: the drum level operation if it is too high, will affect the water separation effect, resulting in deterioration of steam quality, easy to cause the superheater tube wall scaling salt, caused by wall temperature damage; at the same time the fouling thermal resistance increases, resulting in superheated steam temperature decrease. When the boiler is full of water, the steam temperature of superheater will drop sharply, which will cause steam shock to steam pipe and steam turbine, and cause serious destructive accident. The low water level of the drum will damage the boiler water circulation, and the water shortage will be caused by severe water shortage. 2, what are the three principles of treating accidents? Answer: the three do not pass principle of the accident is: The cause of the accident is not clear The accident liability and the educated should not be neglected Without taking preventive measures, what are the tasks of combustion adjustment? Answer: combustion adjustment task can be summed up as three points: (1) to ensure the amount of combustion heat to meet the needs of the outside load, so as to maintain the steam pressure and temperature within the normal range; (2) to ensure the stability of ignition and combustion, the proper combustion center, uniform flame distribution, no burning, and no slagging and over temperature explosion caused by water wall, superheater and so on. Complete combustion, so that the unit is running in the best economic condition. (3) to balance the ventilation and the boiler, a certain negative pressure should be maintained. Why should the boiler carry out chemical cleaning? Answer: a new boiler installed by chemical cleaning agent can prevent the corrosion products and equipment production factory coated oxide skin and remove equipment formed in the transportation and installation process of the manufacturing process, but also ca