Strength of upstream and downstream chambers, collectors, heat exchange tubes of gas aerial cooler apparatus, and assessment of life extension

Abstract

The gas aerial cooler apparatus (ACA) were characterized. These ACA serves for cooling the service gas. The analysis of engineering documentation was carried out in order to establish the range of amenable to control parameters of the engineering status, to carry out the recognition of failures (if ever) and damages that could led to a failure. The applied method of acoustic emission (AE) yielded total and direct information on the defect growth (hazard rate) in materials of operational facilities. The AE control might be used as a determinative procedure for the selection of criteria needed for assessing the status of diverse structures as well as for release to continued operation the production facilities (with providing a necessary level of safety during the enterprise operation) because the AE control enables to detect a fault at early stage of its growth. By applying the AE method for elaboration of a control of specific objectives, complicated problems related to generation of elastic waves from growing cracks and their transformation during propagation up to sensors were successively resolved.

Methodological aspects of studying the parameters of elastic waves and controlling the standard form of acoustic emission in the field

“…Equally oriented faults create the anisotropy of the medium, while microcracks form a network of small heterogeneities, determining the absorbing properties of the medium. The assessment of the geomechanical stability [1][2][3] and the safety of operation of various large-scale underground structures [4][5][6], such as tunnels and liquefied gas tanks, remains relevant [7,8], since the conclusions about the current geomechanical and geodynamic problems provided by mining research institutes state [9][10][11]that the tasks of ensuring safety and timely detection of critical situations that arise during the development of deposits and underground spaces remain not fully resolved. New methods and computer technologies make it possible to assess the stress-strain state in rock masses [12][13][14], but one of the widely used methods for such assessment is the acoustic emission (AE) method [15][16][17] , which studies the process of the initial stages of destruction (initiation and accumulation of microscopic cracks) [18] in various materials, such as rocks [19,20], building materials [21], composites [22].…”