SU1040191A1 - Power-and-heat generating plant - Google Patents

Abstract

THERMAL ENERGY INSTALLATION, containing the main one. and peak steam power circuits and a battery with heat exchange surfaces, connected at the inlet through the heating pair to the steam generator of the main circuit and at the outlet to the network heater, and through the heated pair to the picomS € Qm yi-j KLTGZG:; -. TE2y. :: drank ::; .;. A new circuit, in the turbine condenser of which a heat exchanger is placed, is included in the network water path with a control valve on the pipeline, directly mains supply, so that, in order to economize by heat release Regardless of the current values of power generation and accumulated heat in the battery, the battery is provided with an additional heat exchange surface connected to the pipeline of direct supply water before and after the regulating valve, and the supply heater and heat exchanger are included in the supply circuit parallel Q but FRIEND to a friend. .S

Description

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The invention relates to the field of heat and power engineering and can be used. In thermal power plants, designed to power a variable electrical and thermal loads.

The known power plant contains a battery connected by a charging pipeline to the supply line of the steam from the steam generator to the main condensing turbine, and the discharge pipe to the special peak turbine Cl.

The disadvantage of this setup is the energy release over the condensation cycle.

Also known is a heat and power installation, containing a primary and peak steam power circuits and a battery with heat exchange surfaces, connected at the inlet through the heating pair to the steam generator of the main circuit and at the outlet to the network heater, and in the heated pair to the peak circuit, in the condenser the turbine of which has a heat exchanger included in the network water path with a control valve on the direct network water pipeline 2.

The disadvantage of the known installation is its low efficiency, determined by the close dependence of the heat given to the consumer on the mode of operation of the main and PR5 turbine circuits. During the period of increased electrical loads, the heat output depends on the current parameters of the electric mode of the turbine unit of the peak circuit, and in the period of reduced electric loads, when the battery is charged, the heat output depends on the current parameters of the electric mode of the main circuit and on the temperature of the accumulator substances filled with a battery, i.e. from the current values of accumulated heat in the battery. This makes it impossible to provide a consumer-defined schedule of heat supply without imposing restrictions on the electric modes of turbine units and requires the additional construction of a special heat source designed for a variable heat supply mode.

The purpose of the invention is to increase the efficiency of the installation by supplying heat, independent of the current values of power generation and accumulated in the heat accumulator;

This goal is achieved by the fact that in a heat and power plant that contains the main and peak steam power circuits and a battery with heat exchange surfaces, is connected at the inlet to the main circuit steam generator and at the outlet to the network heater, and the heated pair to the peak circuit , in the turbine condenser of which there is a heat exchanger included in the path of the network Water with an adjustable valve to the pipe of the direct network water, the battery is provided with an additional surface oobmena connected to the straight conduit network water before and after the control valve, and the power and heater heat exchanger included in network water path parallel to each other.

The drawing shows a schematic diagram of the heat and power plant.

The heat power plant consists of a main steam power circuit containing a steam generator 1, a turbine unit (turbine 12 with a condenser, regenerative heaters 4 and 5 of low and high pressure, deaerator 6, feed pump 7. Peak steam power circuit contains accumulator 8 with heating and heated surfaces 9 and 10, a peak turbine unit 11 with a condenser 12, a booster pump 13, as well as a heating system with pipelines 14 and 15 of the reverse and direct supply water, located in the accumulator 8, are A heat exchanger surface 16 connected by pipe 17 with a control valve 18 installed on it parallel to the control valve 19 installed on the pipe 15 of the direct supply water and connected through the valves 20 and 21 parallel to each other, a network heater 22 and a heat exchanger 23 placed. in the condenser 12 peak turbine 11.

Thermal power installation works as follows.

During the period of reduced electrical loads, the pykovtsy turbine unit 11 is shut off, and the turbine unit 2 operates with reduced electrical power or is switched off. The valve 20 is closed, and the valve 21 is opened. An excess of steam produced by the steam generator 1 is fed to the input of the heating surface 9. battery 8, where steam gives part of heat to the accumulator and to the battery filling agent, and condenses. The condensate of heating steam enters the network heater 22, where it heats the network water supplied from the return network pipe 14, and then is pumped by a booster pump 13 into the feedwater path of the main steam-loop circuit.

In the period of increased &n;krkches; - psyche loads all the steam from the steam 2.yo.: Rto.l, {

1 enters the turbo unit 2. The valve 20 at STOM is open, and the valve

21 is closed. The heat accumulated in the accumulator 8 is used to generate secondary steam using a heated surface 10. The resulting steam enters the PIKOBELY turbine unit 11 and then the condenser

12, where it condenses and heats the network water supplied from the return network water line 14.

Starting from the temperature of the mains water after the mains heater

22v period of reduced electrical loads and after the heat exchanger 23

at. a period of increased electrical loads, control valves 18 and 19 ensure the direction of part of the network water to reheat to the additional heat exchange surface 16, taking into account what and the temperature of the network water required by the consumer in the pipeline 15 of the direct network water.

Thus, due to the additional heat exchange surface and the parallel inclusion of the heat exchanger and the network heater, the heat supply to the consumer becomes independent of the current values of the operating modes of the turbines of the main and peak circuits according to the electric schedule and the accumulated heat accumulated, and there is no need construction of a special heat source,. designed for variable heat output.

Claims (1)

HEAT POWER INSTALLATION, containing the main. and peak steam-power circuits and a battery with heat exchange surfaces connected at the inlet along the heating steam to the steam generator of the main circuit and at the outlet to the network heater, and along the heated steam to the peak circuit, into the condenser of the turbine of which the heat exchanger is placed, included in the network water path with a control valve on the direct network water pipe, revealing that, in order to increase profitability by heat. irrespective of the current values of electricity generation and heat accumulated in the accumulator, the accumulator is equipped with an additional heat exchange surface connected to the direct network water pipeline before and after the control valve, and the network heater and heat exchanger are connected to the network water path parallel to _Q but to each other. ©> f