RU141748U1 - MINE AIR HEATING POWER INSTALLATION - Google Patents

Abstract

1. Power plant for heating mine air, including a device for producing a gaseous coolant, a gas-air heat exchanger, a flue, a chimney, an air duct, an intake device for hot air from a barrel, characterized in that the device for producing a gaseous coolant is made in the form of a gas turbine that is connected by a pressure gas duct to a gas-air heat exchanger that heats the air supplied to the mine, while hot flue gases of gases are used as the gaseous coolant turbine coupled to a device that converts the energy of rotation of the turbine into other types of energy. 2. The device according to claim 1, equipped with an electric generator mounted on one shaft with it.

Description

The utility model relates to a power system, in particular in the mining industry, to the processes of heating the air entering the mine.

Known gas heater for heating the air entering the mine, due to the heat of the combustion products of natural gas in a gas burner supplied by an injection fan to a gas-air heat exchanger [1].

A device for heating air entering a mine is known, including a device for producing a gaseous heat carrier based on an internal combustion engine and an electric generator, connected to a gas-air heat exchanger that is connected to a hot blast fan and a smoke exhaust with a chimney, and a hot air intake device for a mine shaft [ 2] is a prototype.

The disadvantage of the prototype and analogue is the significant energy consumption for the drive of draft machines.

The objective of the claimed utility model is to increase the energy efficiency of the process of heating the air entering the mine.

The solution to this problem is achieved by the fact that in a power plant for heating mine air, including a device for producing a gaseous heat carrier, a gas-air heat exchanger, a chimney, a chimney, an air duct, an air intake device for hot air from a barrel, a device for producing a gaseous heat carrier is made in the form of a gas turbine that is connected by a pressure gas duct with a gas-air heat exchanger preheating the air supplied to the mine, while using as a gaseous coolant oryachie leaving gas turbine gases articulated with a device that converts the rotational energy of the turbine into other forms of energy.

In one embodiment of the utility model for converting the rotation energy of a turbine into electrical energy, an electric generator is installed on the same shaft as the turbine to generate electricity for the needs of the mine.

Thus, there is no need to use draft engines for transporting gaseous coolant and the energy efficiency of the process of heating the air entering the mine increases.

The figure shows a power plant for heating mine air.

The power plant for heating mine air includes a gas turbine 1, an electric generator 2, a pressure duct 3, a gas-air heat exchanger 4, a chimney 5, an air duct 6, an air intake device for hot air from the shaft of a mine 7.

Power plant heating mine air works as follows.

Natural gas under pressure is supplied to the gas turbine 1, where it is burned and the thermal energy of the combustion products is converted into mechanical and electrical energy of the shaft rotation of the gas turbine, coupled with a device that converts the energy of rotation of the turbine into other types of energy, for example, with an electric generator 2. After gas the turbines 1 are hot exhaust gases, due to overpressure through the pressure duct 3 are sent to the gas-air heat exchanger 4, in which they give up their heat to the atmospheric air and are removed through the chimney 5. Atmospheric air, heated to the required temperature, is supplied through the duct 6 to the hot air intake device of the mine shaft 7. The electric energy generated by the electric generator 2 is used for the needs of the mine.

Example

During the operation of mines in the mining industry during the cold period, freezing of mine shafts occurs, ice sticks to the equipment of the shaft, which leads to the destruction of the shaft, collapse and thereby create a threat to people and equipment. Ice formation is due to the presence of moisture in the air supplied to the barrel for ventilation and the low ambient temperature. To ensure stable and trouble-free operation of the mines in the cold period, the air for ventilation of the mines must be heated to a temperature that excludes the formation of ice in the mine shaft - not lower than + 2 ° C. A power plant for heating mine air as part of a gas turbine 1 and an electric generator 2 with a capacity of about 5 MW provides the supply of exhaust gases after a gas turbine with a temperature of about 500 ° C due to an overpressure of about 3 kPa through the pressure duct 3 to the gas-air heat exchanger 4, in which the air entering into the mine from the atmosphere, is heated to a temperature of at least + 2 ° C. After the heat exchanger 4, the exhaust gases after the gas turbine are removed through the chimney 5, and the air heated to the required temperature through the duct 6 enters the hot air intake device of the shaft of the mine 7.

Thus, due to the lack of need for draft mechanisms, the production of electric energy for heat consumption and the reduction of electric energy consumption for traction and blasting, the problem of increasing energy efficiency is solved.

Information sources:

1. A.V. Nikolaev, M.Yu. Postnikova, N.N. Mokhirev. Comparative analysis of heat and energy consumption by mine air-heating units. Bulletin of the Perm National Research Polytechnic University. 2010. No5.

2. Pat. RU 2236396, IPC7 C07C 41/06, C07C 1/20, C07C 2/04. Publ. 09/20/2004

Claims (2)

1. Power plant for heating mine air, including a device for producing a gaseous coolant, a gas-air heat exchanger, a flue, a chimney, an air duct, an intake device for hot air from a barrel, characterized in that the device for producing a gaseous coolant is made in the form of a gas turbine that is connected by a pressure gas duct to a gas-air heat exchanger that heats the air supplied to the mine, while hot flue gases of gases are used as the gaseous coolant a turbine articulated with a device that converts the energy of rotation of the turbine into other types of energy. 2. The device according to claim 1, equipped with an electric generator mounted on one shaft with it.

Images