RU2482291C2 - Steam-gas power plant - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: steam-gas power plant comprises a high-discharge combustion chamber separated into a liquid cavity with a regenerator and a steam-gas cavity with partitions creating a row of chambers, an economiser, a turbine and a 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 damper cavities made between its double-wall walls of the cover and the bottom spherically convex outside. At the same time the bottom is arranged as installed on shock absorbers and a hollow stand with a compensator connected with the cover. The hollow stand at the same time is arranged as capable of communicating damper cavities between each other and via a compensating hole in an inner cover wall with the steam-gas cavity of the combustion chamber.

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 generators of electricity in enterprises with autonomous power supply.

Known combined-cycle 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 supplies fuel. The steam received in the boiler rotates the steam turbine, the flue gases from the boiler heat the feed water.

/ V.P. Bezlepkin "Steam-turbine and combined-cycle plants of power plants". SPb .: Publishing house of SPbSTU, 1997, p. 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 economic efficiency in operation.

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, 07/20/2001, / [2].

The disadvantage of the closest analogue is the low productivity and low stability of its combustion chamber against destruction from surges, gas and liquid vibrations in its flow part, water hammer and vibration.

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

The problem is solved in that in a combined cycle gas turbine installation containing a high-pressure combustion chamber, divided into a liquid, for example, a water cavity with a regenerator, and a gas-vapor cavity with partitions forming a series of chambers, an economizer, a turbine and an electric generator, a high-pressure combustion chamber is made in conjunction with a gas turbine installation / GTU /, with the possibility of dumping in its steam-gas cavity of the exhaust gas GTU through a heat exchanger made in the liquid cavity, and through a device for afterburning Lib provided in the gas-vapor cavity. Moreover, the housing of the combustion chamber for strength, reliability and stability against surging, vibration, water hammer is made of a cylindrical shape and with damper cavities made between its double-walled with spherically outwardly curved walls of the cover and bottom. The bottom is made mounted on shock absorbers, for example rubber, and a hollow stand, for example, of tubular steel, with a compensator, for example, in the form of a spring of the same tubular steel, connected to the cover. In this case, the hollow strut is configured to communicate damper cavities with each other and through a compensating hole made in the inner wall of the lid with the gas-vapor cavity of the combustion chamber, which also makes the installation reliable.

The invention is shown in the drawing.

An example of the implementation of the proposed solution.

Combined-cycle power plant contains a high-pressure combustion chamber 1, conventionally divided into a combined-cycle 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 heat utilizer gases 9, a combustion chamber made in conjunction with a gas turbine 10 for discharging gas turbine exhaust gas into its vapor-gas cavity through a heat exchanger 11 made in a liquid cavity and through a device 12, for example, a burner, for afterburning fuel 13, made in the gas-vapor cavity. The housing of the combustion chamber is cylindrical in shape and with damper cavities 14 made between its double-walled and spherically curved 15 and 16 walls of the cover 17 and bottom 18. The bottom is made mounted on shock absorbers 19, for example, rubber, and a hollow strut 20 , for example, of tubular steel, with a compensator 21, for example, in the form of a spring of the same steel, connected with the cover, which makes the combustion chamber reliable and trouble-free in operation. In this case, the hollow strut is configured to communicate the damper cavities of the combustion chamber with each other and through the compensating hole 22 in the inner wall of the lid with a gas-vapor cavity, which provides stability against surges, vibrations, and operational reliability. Starting modes of installation are provided using the exhaust pipe 23 and shutoff valves 24.

Combined-cycle power plant operates as follows.

To start the installation, the fittings 24 are transferred to the exhaust gas through the exhaust pipe 23 into the atmosphere. After starting the gas turbine 10, the valve 24 is again transferred to the working position. High-temperature exhaust gases / for example, with a temperature of 450-550 ° C / from a gas turbine 10 with a content of 14-16% oxygen in volume are fed to a heat exchanger 11, where their heat is transferred to a liquid, for example water, a liquid cavity 4 of combustion chamber 1. Then the gases from the heat exchanger 11 mixed with the fuel 13 are 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. Moreover, all surge, hydraulic, vibrational, various kinds of shock loads on the flow part and on the combustion chamber 1 as a whole are weakened and extinguished by its cylindrical shape by the casing and damper cavities 14 made between it double-walled with spherically curved 15 and 16 walls of the cover 17 and bottom 18. The bottom is made mounted on shock absorbers 19 and a hollow strut 20, for example, of tubular steel with a compensator 21, in the form of a hollow spring made of t the same tubular steel associated with the lid, which also makes the combustion chamber 1 reliable and durable. Moreover, all changes in the gas pressure in the combustion chamber during its operation through the compensating hole 22 in the inner spherically curved wall 15 of the cover 17 and then through the cavity in the rack 20 and in its compensator 21 are transmitted to the damper gas cavities 14 in the cover 17 and the bottom 18, and they are extinguished due to the compressibility of gases and energy dissipation. From the turbine 6, the spent mixture enters the regenerator 5 in the liquid cavity 4 of the combustion chamber 1. From the regenerator 5, the gas-vapor mixture enters the economizer 8 and heats the make-up water there. Then the exhaust gases, together with the gas-vapor mixture, enter the exhaust gas heat recovery unit 9, are washed there with water and are thrown out into the atmosphere through the exhaust pipe.

The proposed installation is simple, compact, environmentally friendly, highly efficient and reliable in operation. It will be widely used in the energy sector and for autonomous power supply of various enterprises and facilities.

Claims (1)

Combined-cycle power plant 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 turbine, an electric generator and a waste gas heat utilizer, characterized in that the high-pressure combustion chamber is made combined with a gas turbine installation (GTU ), with the possibility of discharging GTU exhaust gases into its vapor-gas cavity through a heat exchanger made in the liquid cavity, and through the top-burner a willow made in a gas-vapor cavity, the combustion chamber body made of cylindrical shape and with damper cavities made between its double-walled and spherically curved walls of the cover and bottom, the bottom being made mounted on shock absorbers and a hollow rack with a compensator associated with the cover, hollow the rack is made with the possibility of communication of the damper cavities with each other and through a compensating hole made in the inner wall of the lid with the gas-vapor cavity of the combustion chamber.

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