Experimental methods for assessing the materials quality of lining for the ship boilers combustion chambers

Abstract

Autonomous boilers, the most important element of which is the combustion chamber, are widely used in ship power plants. A necessary condition for a high resource of boilers and their trouble-free operation is the high quality of the lining of the furnace space, operating under variable thermal conditions. The quality of the material from which it is made has a decisive influence on the reliability of the lining. The methods of experimental research that can be used to assess the quality of materials for lining the furnace spaces of autonomous boilers are described in the paper. The methodology of conducting research using the method of equivalent materials is presented, laboratory installations for conducting vibroacoustic studies and modal analysis of spectrograms and thermal imaging studies of samples of lining materials are described. As a result of the research, information on the influence of conditions for the formation of equivalent materials samples on their thermophysical properties, spectrograms of the state of brickwork bricks made of various materials, thermal images of lining elements in a stationary temperature field at different locations on the heater is obtained. The results obtained indicate the expediency of using the proposed methods at all stages of the life cycle of autonomous boilers: when designing for a rational choice of lining materials taking into account operational factors, during manufacture and repair during operation to control the quality of materials used and detect hidden defects. In order to increase the effectiveness of the proposed experimental methods for assessing the quality of lining materials of boiler combustion chambers, it is necessary to expand the practice of their use, the accumulation of the results obtained and their statistical processing, which allows us to determine the error of the methods and improve laboratory installations.