Modernization of technological equipment in the waste water purification process behind the coke oven using the organic Rankine cycle

Abstract

The authors analyzed the state of the process scheme, which is a structural part of the water supply treatment facilities. The research results can be applied in oil and gas, chemical, metallurgical and energy industries. In particular, the authors for the first time propose an efficient scheme for the reuse of heat to obtain purified water. Currently, a way to reduce energy consumption by introducing a plant based on an organic Rankine cycle has been considered. The metallurgical production has such equipment as converters, coke ovens, scrubbers, gas ducts, cooling boilers, waste heat boilers. The heat recovery schemes developed by the authors increase the efficiency of the process equipment in the metallurgical industry. In the work of enterprises, low-potential heat of soil, water, air is increasingly used. One of the main directions of energy saving to increase the energy efficiency of the boiler house is to increase the heat utilization rate of the fuel at power plants. Boiler houses that run on gas lose at least 13-18% of heat with flue gases. In the article, the authors propose to combine the methods of heat utilization. Namely, a contact heat exchanger and an organic Rankine cycle are used. The water temperature is significantly reduced due to the fact that the collectors are designed to transport water. In this regard, experts consider it expedient to utilize the heat of wastewater not only at treatment plants, but also directly in the building itself. Prospects for the use of the authors’ developments are associated with their further implementation at industrial enterprises of the metallurgical industry.