Reasons for low temperature of electromagnetic furnace
First, it can add the amount of flue gas, change the distribution of radiant and convective heat, add the heat absorption proportion of heating surface with convective characteristics such as superheater and reheater, and reduce the heat absorption proportion of evaporation surface, which is beneficial to improving steam temperature;
Second, increasing the excess air coefficient at the furnace outlet within a specific range can improve the theoretical incineration temperature and the flue gas temperature at the furnace outlet, which is also beneficial to improving the steam temperature. The experiment shows that the air leakage rate of the air preheater is as high as 35% (the original planned air leakage rate is 12%), resulting in the lack of output of the induced draft fan, and the excess air coefficient at the furnace outlet can only reach about 1.1 at full load. According to the calculation, under the condition of burning "operating coal type II" planning parameters, the flue gas temperature can be increased by 14 ℃ when the excess air coefficient at the furnace outlet is increased from 11 to 125
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11-29
Detection method of common faults of medium frequency electric furnace
1. First, observe whether the indication values of the four small meters in the if cabinet are normal. The rectifier operated voltmeter is 30V, the rectifier pulse ammeter is 130 ~ 150mA, the inverter operated voltmeter is 12V, and the inverter pulse ammeter is 100 ~ 120mA. If the value is withi
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11-29
How to maintain the medium frequency electric furnace?
1. Regularly remove the dust in the power cabinetIn particular, the outside of the thyristor core shall be wiped clean with alcohol. The frequency conversion equipment in operation generally has a machine room, but the actual working environment is not ideal. In the smelting and forging proc
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11-29
How to maintain the electromagnetic heating controller?
In order to ensure the uninterrupted operation of the electromagnetic heating controller, it is necessary to protect and maintain it regularly:1. Always add lubricant to the movable part of the electromagnetic brake.2. Check the length of armature stroke regularly. During the operation o
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11-29
Causes of abnormal starting of medium frequency electric furnace
What is the cause of abnormal start of medium frequency electric furnace?Lack of phase of rectifier: the fault is that the sound is abnormal during operation, the larger output voltage rises below the rated value, and the abnormal noise announced by the power cabinet is becoming larger and l