Kiln sealing set of support structure improvement

2021 - kiln sealing set of support structure improvement 02 - 13 Bai Jiangong ( Tianjin jinyu promoting environmental protection technology co. , LTD. ) A, introduced a company production line two rotary kiln kiln head sealing device in 2009, 2010, has carried on the technological upgrading, from original scales chip contact seal to composite sealing device ( See figure 1) , modified very good solve the problem of the kiln head air leakage, leakage of material, the environment and to burn into the secondary air temperature has increased significantly. Figure 1 the principle diagram of the gland in the later use process, find seal set of frequent adjustment bolt welding phenomenon, generally appear in the rotary kiln check after the fire in the process of heating up again. Adjustment bolt action is gland and kiln cylinder concentricity, guarantee seal set of radial runout is less than 5 mm, is advantageous to the sealing cover, linking piece form airtight sealed space. When installation, adjust the good sealing cover with gap between kiln cylinder need to adjust the bolt ends after respectively with cylinder body and seal welding, have the effect of support adjustment and part under torsion. Adjusting bolt after welding, sealing set with rotary kiln concentricity deviation increases, when the maximum of 70 mm, seriously affect the normal use of clamp, adjusting bolt after welding, support plate by torque increase, easy to crack or open welding, cold wind set of loss. In October 2015, the company cold wind set # 1 kiln due to these reasons fall off, shut down 72 h and caused heavy losses. Second, cause analysis and solutions through the close observation of the cold wind set, adjusting bolt open welding is happened in check after the fire in the process of heating up, through analysis, that the causes of the frequent open welding heat bilges cold shrink cause is rotary kiln. Rotary kiln in the process of heating up again after cooling, heat sealing cover, cylinder, adjust the bolt deformation, result in the crack of the joint. After find out the reason, the author has carried on the corresponding technical reformation, when installing a cold wind set, after the adjustment bolt in place, welding, divide between rotary kiln and seal set with 8 groups of S type support plate, S board of horizontal section is used to absorb heat and cold deformation, guarantee the sealing cover with the concentricity kiln cylinder ( See figure 2) 。 Figure 2 diagram 3, endnotes since 2016 after the reform, the effect is obvious, never similar problems, especially in 2017 for environmental limit stops, the rotary kiln check fire heating up for many times, all did not appear similar situation, sharply reduced amount of maintenance, to ensure the normal running of rotary kiln. Source: 'cement project' 04, 2018