RU2798262C1 - Device for cooling cycle air of a gas turbine unit - Google Patents

Abstract

FIELD: gas turbine units.

SUBSTANCE: invention can be used to cool cycle air before supplying it to an axial compressor, to increase the efficiency and economy of gas compressor units. The device for cooling cycle air of a gas turbine unit contains a gas turbine unit with a compressor, a combustion chamber, a gas turbine, a smoke exhauster, a heat exchanger, an air mixing device and an absorption lithium bromide refrigeration unit. The selection of exhaust gases for operation of the absorption lithium bromide refrigeration unit is carried out by a smoke exhauster from the exhaust shaft. The heat exchanger and the air mixing device are installed in the complex air cleaning device.

EFFECT: implementation of the invention provides a solution to the following technical problems: reduction of electricity consumption, facilitation of the technological process of cooling cycle air, excluding the coolant in the role of water, and ensuring versatility of the system. Invention improves the efficiency, environmental friendliness and economy of gas turbine units.

2 cl, 1 dwg

Description

The invention relates to the field of gas turbine plants and can be used to cool cycle air before supplying it to an axial compressor, to increase the efficiency and economy of gas compressor units.

A device is known for stabilizing the power of a gas turbine plant (RU No. 2126902, F02C 6/18, 27.02.1999) applicable to gas compressor units of the gas industry, mainly operating in areas with a hot climate to stabilize the mass productivity of an air compressor, with an increase in ambient temperature. The device includes an air cleaner and a gas cooler connected to the inlet pipe of the air compressor and the exhaust pipe of the gas turbine plant, respectively.

The disadvantage of this technical solution is the use of water as a coolant, partial selection of exhaust gases directly from the gas turbine, which reduces the efficiency of the gas turbine plant.

The closest in technical essence and the achieved result is an evaporative cooler, as well as a gas turbine plant with evaporative cooling, containing a compressor, a combustion chamber and a gas turbine, in which heat is taken from natural gas to gas air coolers (RU No. 2662009, F04D 25/ 02, 23.07.2018). This scheme uses water as a heat carrier, the required heat is taken in front of the gas air coolers. At the same time, the scheme assumes to contain: an evaporative cooler, a power supply device, a water collection chamber, and a chemical water treatment plant.

The disadvantage of this technical solution is the complex process of converting heat into cold, the intermediate coolant in the role of water, the complexity of the design, which entails significant maintenance costs, environmental friendliness, and high energy costs.

The implementation of the invention provides a solution to the following technical problems: reduction of electricity consumption, facilitation of the technological process of cooling cycle air, excluding the coolant in the role of water and the versatility of the system.

The specified technical result is achieved by the fact that in the device for cooling the cycle air of a gas turbine plant, including a compressor, a combustion chamber, a gas turbine, a smoke exhauster, a heat exchanger, an air mixing device and a complex air cleaning device, according to the proposed technical solution, an absorption lithium bromide refrigeration unit is installed, connected by inlet pipelines with shut-off valves with an air mixing device, a smoke exhauster and a heat exchanger, during the warm period, the warm air supply valve is closed, the exhaust gases after the turbine of the gas turbine plant are sent to the exhaust shaft, where a part of the exhaust gases is sent by the smoke exhauster to the lithium bromide absorption refrigeration unit, in which the incoming Atmospheric air is cooled and sent to an air mixing device, which is part of a complex air cleaning device.

In addition, the heat exchanger for the anti-icing system, which is part of the integrated air cleaning device, is installed after the compressor of the gas turbine plant, the switches are made by appropriate taps, in the warm period of time the warm air supply valve is closed, and in the cold period of time the unit with the absorption lithium bromide refrigeration unit is cut off, warm the air after the compressor of the gas turbine plant is sent to the air heat exchanger, after use, the exhaust air is vented to the atmosphere.

The cycle air cooling device includes an absorption lithium bromide refrigeration unit, supply pipelines, an air mixing device, a smoke exhauster and a heat exchanger used as an anti-icing system in winter. In contrast to the scheme under consideration as a prototype, the lithium bromide absorption refrigeration unit has relatively low electricity consumption, since it uses the thermal energy of the processed substance for operation. A smoke exhauster is supplied to the exhaust shaft of the gas-pumping unit, which selects part of the exhaust gases. In the cold season, the block of the absorption lithium bromide refrigeration unit is cut off by taps for bypassing warm compressed air directly into the integrated air cleaning device into the anti-icing system. Facilitation of the cycle air cooling process consists in the exclusion of an intermediary in the form of water from the system, the use of the system both in summer and winter, as well as a relatively simple scheme for operating an absorption lithium bromide refrigeration unit.

In FIG. 1 shows a diagram of the proposed cycle air cooling system, where

1 - absorption lithium bromide refrigeration unit;

2 - smoke exhauster;

3 - complex air cleaning device;

4 - gas turbine compressor;

5 - combustion chamber;

6 - turbine of a gas turbine plant;

7 - air heat exchanger;

8 - device for mixing air.

The device works as follows. In the warm period of time, the warm air supply valve is closed. The exhaust gases after the turbine of the gas turbine plant 6 are sent to the exhaust shaft, where a part of the exhaust gases is sent by a smoke exhauster 2 to the absorption lithium bromide refrigeration unit 1, in which the incoming atmospheric air is cooled and sent to the air mixing device 8, which is part of the integrated air cleaning device 3.

In the cold period of time, the block with the absorption lithium bromide refrigeration unit 1 is cut off, the warm air after the compressor of the gas turbine plant 4 is sent to the air heat exchanger 7, which acts as an anti-icing system, which is part of the integrated air cleaning device 3, after use, the exhaust air is vented into the atmosphere.

Thus, the proposed cycle air cooling scheme is energy-saving, in view of the low power consumption of an absorption lithium bromide refrigeration unit, and easy to operate, in view of the rejection of water as a heat carrier. The simplicity of the proposed scheme will ensure reliable operation and long service life of the units.

Claims (2)

1. A device for cooling the cycle air of a gas turbine plant, including a compressor, a combustion chamber, a gas turbine, a smoke exhauster, a heat exchanger, an air mixing device and a complex air cleaning device, characterized in that an absorption lithium bromide refrigeration unit is installed connected by supply pipelines with shut-off valves to the device for air mixing, with a smoke exhauster and a heat exchanger, in the warm period of time, the warm air supply valve is closed, the exhaust gases after the turbine of the gas turbine plant are sent to the exhaust shaft, where a part of the exhaust gases is sent by the smoke exhauster to an absorption lithium bromide refrigeration unit, in which the incoming atmospheric air is cooled and sent to device for mixing air, which is part of a complex air cleaning device. 2. The device for cooling the cycle air of a gas turbine plant according to claim 1, characterized in that the heat exchanger for the anti-icing system, which is part of the integrated air cleaning device, is installed after the compressor of the gas turbine plant, switching is carried out by the corresponding taps, in the warm period of time the warm air supply valve is closed , and in the cold period of time, the block with the absorption lithium bromide refrigeration unit is cut off, the warm air after the compressor of the gas turbine unit is sent to the air heat exchanger, after use, the exhaust air is bled into the atmosphere.

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