ОЦЕНКА ЭНЕРГОЗАТРАТ ДЛЯ ПОСЛОЙНОГО ВНУТРЕННЕГО КОНТРОЛЯ ФУНКЦИОНИРУЮЩЕЙ ДЫМОВОЙ ТРУБЫ С ПОМОЩЬЮ АВТОНОМНОГО АППАРАТА

Background Meantime at the facilities of Fuel and Energy Complex of Russia which main capacities and objects were constructed during the Soviet period there are several thousands chimneys that have worked out their design service life and they are in need of repair and reconstruction. The chimneys are terminal segment of many technological processes on the facility. The chimney failure can lead to stoppage in production, shutdown of technological processes and also to the considerable financial expenses on repair and reconstruction of the defected chimneys. Reliability and safety of chimneys functioning depends on timeliness and efficiency of their technical condition control. Intratubal instrumental examination of the functioning chimney is possible with use of the modern methods of non-destructive monitoring and the automated systems. One of such systems is the autonomous device (AD) lowered in the functioning chimney on a cable (suspension) towards ascending high-temperature gases stream. AD is equipped with cameras which perform photography of annular bands of chimney lining at predetermined intervals. Pendular oscillations of the device in the turbulent flow lead to overlap (crossing) of annular bands control and as a result to repeated photography of certain sites of chimney surface and additional costs of energy resources. Thus, it is important not only to estimate chimney surface area which forcedly is exposed to repeated monitoring and as a result this increases energy consumption by chimney monitoring procedure in general, but also to achieve higher degrees of resolution during chimney monitoring. Also it is needed to develop power efficient chimney monitoring circuit and to prove the usage of new energy saving technologies during performing defectoscopy. Aims and Objectives Development of efficient flow circuit for carrying out chimney fiber intratubal monitoring with use of AD. The analysis and estimation of energy consumption on performing diagnostics allow us to create the modern technology of monitoring and diagnostics of the functioning chimney on oil and gas complex facilities. Methods System analysis methods of technology with use of AD, methods of mathematical and physical processes modelling of radiations distribution in gases and methods of optical physics were applied. Results As a result of the research mathematical expression for estimated coefficient for overlapping of control bands (parts of the chimney surface which are subjected to repeated monitoring) depending on the critical angle of AD inclination is received. It is established that for a mid-size chimney on application of AD in basic configuration overlapping coefficient is equal 0.8, on application of AD with optical stabilization system - 0. Dependence of energy consumption on illumination of chimney controlled surface via AD is received. Two designs of the AD were developed during the researches. Technical solution on gyro stabilization of entire AD (fixing AD on a gimbal suspension and equipment with flywheel) is fairly simple for implementation and allows to significantly increase monitoring resolution ability. Conclusion For effective control of chimneys which are functioning on oil and gas complex facilities it is necessary to use the advanced AD with optical stabilization system. Use of the developed device allows to reach necessary defectoscopy resolution ability and efficient resource utilization on carrying out the full range functioning chimney monitoring.