What are the difficult issues in the construction of lime kilns
As an industrial construction project, the construction process of lime kilns is technically complex and highly integrated, often facing many difficult problems that directly affect the quality, safety, and progress of the project. The main construction difficulties can be summarized as follows:
Firstly, the foundation construction requires high standards and precise installation of the structure is difficult. The main equipment of the lime kiln has a huge volume and weight, which requires extremely strict requirements for settlement control of equipment foundations (such as rotary kiln foundations), accuracy of embedded parts, and heat resistance of concrete. Any small deviation may cause the core equipment to be unable to be installed smoothly or generate significant stress during operation, affecting long-term stable operation.
Secondly, the lifting and assembly technology of core equipment is complex. Especially the lifting, aerial assembly, and welding of large rotary kiln shells are critical paths and major risk points in construction. The straightness and concentricity of the cylinder, as well as the sealing installation accuracy of the kiln head and tail, directly determine the operating efficiency, energy consumption, and service life of the kiln. This process has high technical requirements and high operational risks, making it the core difficulty in construction.
Thirdly, the amount of refractory masonry work is large, and quality control is difficult. A large amount of special refractory materials are used in the lining of the kiln, and the quality of their masonry is the key to ensuring the efficiency and service life of the thermal system. The construction environment is narrow and there are many cross operations. There are strict regulations on masonry techniques (such as mortar joint control and expansion joint setting) and drying curves. Quality defects are difficult to remedy after production, which can easily lead to premature damage to the kiln lining.
Fourthly, the installation of process pipelines and environmental protection facilities is complex. The complex process pipeline network involving high-temperature flue gas, compressed air, etc. requires high requirements for layout, welding, and insulation construction. At the same time, the supporting environmental protection facilities such as desulfurization and dust removal have a large structure, and the internal components are installed finely. The construction quality directly affects the final emission standards.
The construction of lime kilns is a systematic project that involves multiple disciplines such as civil engineering, machinery, thermal engineering, and automation. Only by overcoming these difficulties in precision, technology, and organizational management can we lay a solid foundation for building an efficient, environmentally friendly, and long-lasting lime kiln.
