Automation of a group of feed pumps in a transportable boiler plant

Modernization of automatic control systems of electrical devices plays an important role in terms of energy efficiency and energy saving in the operation of thermal power plants. The development of an educational laboratory stand, which simulates the operation of a direct-flow steam boiler of a coil type as part of a transportable boiler plant, allowed the introduction of an automatic control system for a feed pump with the help of the introduction of a controller, a frequency drive and control of the device through the SCADA program. Using experimental data as a result of the work of the educational laboratory stand, the idea of creating an automated control system for a group of feed pumps for direct-flow steam boilers of the coil type, which are operated as part of a transport boiler plant at an oilfield site, is proposed. This installation and boiler unit are taken as basic models when designing a training laboratory stand. The purpose of the work is to create an automation scheme for a group of pumps of a transportable boiler plant, using experimental data from an educational laboratory stand, as well as taking into account the theoretical and practical component for the use of automation of all or part of a group of feed pumps from the point of view of energy efficiency and energy saving. Materials and methods contain information on the creation and adaptation of a mathematical model to describe the operation of pumps, taking into account hydraulic resistances that arise due to boiler coils - wound pipes of complex shape in the form of a coaxial cylinder. The results of the work are reflected in the form of an algorithmic block diagram of the pump unit and a schematic diagram of the automation of a group of pumps of a boiler plant. In the course of the work, a list of equipment for upgrading the control system of the feed pump unit was proposed. In conclusion, the prospects for further development in this area are considered, the advantages of dividing pumps into subgroups are given, such as the main - regulated and auxiliary - unregulated, as well as positive aspects in the use of frequency control for the main pumps as part of the operated boiler plant.