【Q&A Question 172】2018.06.21
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【Q&A Question 172】June 21, 2018: Why is it necessary to dry out a heating furnace after its construction or major repair? The purpose is to gradually remove the moisture that accumulates during the construction of the furnace walls, and to ensure that the refractory mortar undergoes proper sintering. This prevents cracks or deformation in the lining, as well as breaks or collapses in the furnace walls, due to the rapid increase in temperature inside the furnace and the subsequent vaporization of large amounts of moisture, which causes volume expansion. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below. The APP short-video skills competition has started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Ensure the performance of the refractory insulation materials for the furnace wall
Its purpose is to gradually remove the moisture accumulated during the construction of the furnace wall, and to allow the refractory mortar to sinter fully, thereby preventing cracks or deformation in the lining, as well as splitting or collapse of the furnace wall, due to the rapid increase in temperature inside the furnace at the time it starts operating, which causes large amounts of moisture to vaporize and expand in volume.
Its purpose is to slowly remove the moisture accumulated during the construction of the furnace walls, and to allow the refractory mortar to sinter fully, thereby preventing the bricks and lining from cracking due to the rapid vaporization of moisture when the plant starts operating and the temperature in the furnace rises sharply.
Its purpose is to gradually remove the moisture accumulated during the construction of the furnace wall, and to allow the refractory mortar to sinter fully, thereby preventing cracks or deformation in the lining, as well as splitting or collapse of the furnace wall, due to the rapid increase in temperature inside the furnace at the time it starts operating, which causes large amounts of moisture to vaporize and expand in volume.
Its purpose is to gradually remove the moisture accumulated during the construction of the furnace wall, and to allow the refractory mortar to sinter fully, thereby preventing cracks or deformation in the lining, as well as splitting or collapse of the furnace wall, due to the rapid increase in temperature inside the furnace at the time it starts operating, which causes large amounts of moisture to vaporize and expand in volume.
Furnace drying involves gradual heating in stages, with the natural and crystalline water contained in the furnace walls and refractory materials being removed slowly step by step, thereby enabling the sintering of refractory and insulating materials. The furnace wall of the heating furnace must be protected and insulated using fire-resistant and insulating materials ； These fire-resistant and insulating materials contain a large amount of moisture before their first use. If they are put into operation without first being dried in a furnace by gradually increasing the temperature to allow the moisture to evaporate slowly, rapid temperature rise will cause the moisture inside to evaporate intensively, which can lead to the material rupturing or being damaged; in severe cases, this may even result in the collapse of the furnace walls.
Baking of the heating furnace is carried out after its construction or major repair for the purpose of slowly removing the moisture accumulated during the construction of the furnace walls before it is put into use, and to ensure that the refractory mortar is fully sintered. This prevents cracks or deformation in the furnace lining, as well as cracking and collapse of the furnace walls, that could occur due to a rapid increase in temperature inside the furnace, massive vaporization of moisture, and resulting volume expansion when the unit starts operating. At the same time, a thermal load test is conducted on the heating system, the equipment belonging to the heat absorption system, as well as the process pipelines and automatic control systems, in order to evaluate the performance of all burners and the behavior of the furnace components under thermal conditions.
To remove the moisture from the refractory materials inside the furnace, and to prevent the furnace temperature from rising too rapidly at startup, which could cause the moisture to vaporize abruptly, leading to expansion of the furnace walls, cracks, deformation, and even collapse.
Its purpose is to slowly remove the moisture accumulated during the construction of the furnace wall, and to allow the refractory mortar to sinter fully. This prevents cracks or deformation in the lining, as well as splitting or collapse of the furnace wall, that could occur when the temperature inside the furnace rises rapidly at the start of operation, causing large amounts of moisture to vaporize and expand in volume.