RU2482285C2 - Steam-gas plant - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: steam-gas plant comprises a high-discharge combustion chamber separated into a steam gas cavity with partitions forming a row of chambers and a liquid cavity with a regenerator, an economiser, an effluent gas heat recovery unit, a turbine and a power generator. The high-discharge combustion chamber is made as combined with a gas turbine unit /GTU/, as capable of its discharge into its steam-gas cavity of GTU exhaust gases, via a heat exchanger made in the liquid cavity and via a device for afterburning of fuel made in the steam-gas cavity. Besides, the combustion chamber body is made of cylindrical shape and with a cover and a bottom that are spherical and concave into the combustion chamber body, the bottom at the same time is made as installed into shock absorbers and connected by a stand with a compensator connected to its cover.

EFFECT: invention makes it possible to increase efficiency and reliability of a plant in operation.

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Description

The invention relates to the field of energy and can be used to generate electricity in thermal power plants and as stand-alone generators of electricity in enterprises.

Known gas-gas plant with a boiler full combustion, containing a gas turbine unit, a steam boiler, a steam turbine and gas-water heat exchangers, where the exhaust gases of a gas turbine installation / gas turbine / are fed to the burners of a steam boiler, which also serves fuel. The steam produced in the boiler rotates the steam turbine. The flue gases from the boiler heat the feed water.

/ V.P. Bezlepkin. Combined-cycle and steam-turbine installations of power plants. SPb .: Publishing house of SPbSTU, 1997, pp. 27-30 / [1].

A disadvantage of the known installation is the presence of a large composition of equipment necessary for the implementation of two thermodynamic cycles, which increases its size and reduces work efficiency.

Closest to the proposed invention is an energy unit containing a high-pressure combustion chamber, divided into a gas-vapor chamber with chambers and a liquid chamber with a cavity regenerator, where the combustion products are cleaned and cooled in chambers above the liquid mirror, a fuel supply device, an economizer, a waste gas heat utilizer, a compressor, an electric generator and a turbine, the exhaust gases of which enter the regenerator and then to the economizer.

/ RF patent No. 2170827, F01K 11/00, 13/00. July 20, 2001 / [2].

The disadvantage of the closest analogue is the low productivity and low stability of its combustion chamber against destruction from surges, gas vibrations, water shocks and vibrations, etc.

The technical problem solved by the invention is to increase the productivity and reliability of the installation in operation.

The problem is solved in that in a combined-cycle plant containing a high-pressure combustion chamber, divided into a liquid, for example water, cavity with a regenerator and a gas-vapor cavity with partitions forming a series of chambers, an economizer, a heat exchanger of exhaust gases, a turbine and an electric generator, a high-temperature combustion chamber is made combined with a gas turbine installation / gas turbine /, with the possibility of discharge into its gas-vapor cavity of gas turbine exhaust through a heat exchanger made in the liquid cavity, and through a fuel burning facility made in a gas-vapor cavity. Moreover, the housing of the combustion chamber is made cylindrical and spherical, inside the housing of the combustion chamber with a concave cover and bottom. The bottom is made mounted on shock absorbers, for example rubber, and a stand with a compensator, for example, also rubber, associated with the cover.

The invention is shown in the drawing.

An example of the implementation of the proposed solution

The combined-cycle plant contains a high-pressure combustion chamber 1, conventionally divided into a gas-vapor cavity 2 with partitions forming a series of chambers 3, and a liquid cavity 4, for example, filled with plain water, with a regenerator 5, a turbine 6, an electric generator 7, an economizer 8, a waste gas heat utilizer 9. The combustion chamber is made combined with the gas turbine 10, with the possibility of discharge into its gas-vapor cavity of the gas turbine exhaust through a heat exchanger 11, made in the liquid cavity, and through the device 12 for afterburning the fuel 13, made in pa ogazovoy cavity. Moreover, the housing of the combustion chamber is made cylindrical and spherical, inside the housing of the combustion chamber with a concave cover 14 and a bottom 15. The bottom is made mounted on shock absorbers 16, for example rubber, and a strut 17 with a compensator 18, for example, also rubber, associated with the cover. Starting moments of the installation are provided using the exhaust pipe 19 and shutoff valves 20.

The combined-cycle plant works as follows.

To start the installation, the fittings 20 are transferred to the exhaust gas through the exhaust pipe 19 into the atmosphere. After starting the gas turbine 10, the valve 20 is again transferred to the working position. High-temperature exhaust gases / with a temperature of 450-550 ° C / from the gas turbine 10 with a content of 14-16% oxygen in volume enter the heat exchanger 11, which transfers part of their heat, for example, plain water, the liquid cavity 4 of the combustion chamber 1. Then the gases from the heat exchanger 11 mixed with fuel 13 is fed to the burners of the device for afterburning fuel, where after burning the fuel 13 the temperature of the gases is raised, for example, to 900-1100 ° C and dumped into the gas-vapor cavity 2 of the combustion chamber 1, which increases the productivity and efficiency of the installation. In the vapor-gas cavity 2, gases move through the chambers 3 formed by the partitions to the turbine 6, contact the liquid of the liquid cavity 4, mix with its vapor and cool to the value required for the turbine blades 6. Then the mixture enters the turbine 6, which rotates the electric generator 7. In this case, all surge, hydraulic, vibration, shock loads on the flow part and the combustion chamber 1 as a whole are weakened and canceled by its cylindrical shape with a spherical body, concave cover 14 and bottom inside the body 15 and shock absorbers 16, for example rubber, on which the combustion chamber 1 is mounted with its bottom 15, and which, with a strut 17 with a compensator 18, for example, also rubber, is connected to the cover 14, which ensures trouble-free and efficient operation that installation. From the turbine 6, the spent mixture through the regenerator 5 in the combustion chamber 1 enters the economizer 8 and heats the make-up water. Then the exhaust gases together with the vapor-gas mixture in the exhaust gas heat recovery unit 9 are washed with water and thrown out into the atmosphere through the exhaust pipe.

The proposed installation is simple, compact, environmentally friendly, highly reliable in operation, economical and highly efficient. It will be widely used in the energy sector and for autonomous use in enterprises.

Claims (1)

A combined cycle gas turbine unit containing a high-pressure combustion chamber divided into a liquid cavity with a regenerator and a gas-vapor cavity with partitions forming a series of chambers, an economizer, a heat exchanger of exhaust gases, a turbine and an electric generator, characterized in that the high-pressure combustion chamber is combined with a gas turbine unit (GTU) , with the possibility of discharge into its vapor-gas cavity of the exhaust gas turbine through a heat exchanger made in the liquid cavity, and through a device for afterburning fuel, made e in the gas-vapor cavity, the combustion chamber housing being made cylindrical and with a spherical concave cover and bottom inside the combustion chamber housing, the bottom being mounted on shock absorbers and a strut with a compensator associated with the cover.

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