Perm National Research Polytechnical University, Perm, Russia:

A. V. Nikolaev, Associate Professor, Candidate of Engineering Sciences, nikolaev0811@mail.ru
A. I. Tsaplin, Professor, Doctor of Engineering Sciences

The article describes the system of water heating by furnace gases from centralized boiler plant. Scrubbed in a filter, furnace gases go along a pipeline to a coil pipe placed in a tank with water. The coil pipe is made so that to have the maximum contact area between the heat-exchange surface and the heat carrier (water). Depending on the flow rate of furnace gases, it is proposed to mount blower fans at the inlet or outlet of the coil pipe. For more uniform heating of water, it is suggested to install a propeller mixer and/or a pneumatic “jet-type” agitator in the tank. The process of water heating and transport is automatic. To that end, the water and furnace gas pipelines as well, as the tank are equipped with sensors that send readings to the automation system to adjust position of governor valves and to control feed pump flow rate. Heated in the tank, water flows to a mixing cell additionally filled, if necessary, with hot water from the centralized boiler plant. When water has the required parameters (monitored by sensors), it is fed to the mine heating unit meant to heat air in air supply shafts in cold seasons. Based on the calculated heat transmission from boiler plant gases to water under turbulization conditions, it has been found that the proposed system will allow saving of hot water fed from the centralized boiler plant to the mine heating unit. It is shown that the system of utilization of furnace gas energy in mine heating units is efficient in terms of energy saving during air treatment in underground mines in cold seasons.

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