SU1231237A1 - Thermal power plant - Google Patents

Description

The invention relates to the energy sector, in particular, to thermal power plants powered by gas fuel, and can be used to produce heat and electrical energy in thermal power plants.

The purpose of the invention is to increase the efficiency of the heat and power plant by increasing the power of the steam turbine plant.

The drawing shows the principal thermal diagram of the heat and power installation.

Thermal power plant contains a boiler 1, a pair of pipe 2 with a steam turbine 3, to the condenser 4 of which pipes 5 and 6 are connected, supplying and discharging cooling water are connected. Gas flow turbine 7 is connected between high and low pressure gas lines 8 and 9. A high pressure gas pipeline 8 is connected to a manifold 10, the latter is communicated through a device 11 for lowering gas pressure by a low pressure gas pipeline 12 with a furnace (gas burners) 13 of boiler 1, and a gas pipeline 9 is also connected to the latter. After the gas flow turbine 7, a preheater 14 is connected heating medium by pipelines 15 and 16 for supplying and discharging the heating medium to the cooling water supply pipeline 5, and the control valve 17 is installed on the latter. Turbines 3 and 7 are connected to electric generators 18 and 19.

Compiled by L. Solovyov Tehred I. VeresKorrektor V. Sinitska

Circulation 500 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Gas flow turbine 7 can be made of groups of stages (not shown) of different initial pressures, behind which gas preheaters 14 are installed, connected via a heating medium to the coolant supply line 5.

The installation works as follows.

A part of the gas intended for combustion in the furnace 13 of the boiler 1 is fed via a high-pressure gas pipeline 8 to the gas-flow turbine 7, where it is doing its work, which is stretched. After the gas flow turbine 7, the gas with reduced pressure and temperature is supplied via the low pressure pipeline 9 to the preheater 14 and, after heating therein, to the furnace 13 of the boiler 1 via the low pressure pipeline 9. The rest of the gas is fed to the device 11 to reduce the pressure and then through the low pressure gas pipeline 12 to the furnace 13 of the boiler 1.

In order to preheat gas, preheater 14 supplies cooling (circulating) water through conduit 15 from cooling water supply conduit 5 to condenser 4. After preheater 14, the heating medium is mixed with the main flow of cooling water in front of condenser 4. The amount of water supplied to the preheater 14, is regulated by valve 17. This increases the power generation at generator 18 by decreasing the pressure in the condenser 4, due to the decrease in the temperature of the cooling water.

Claims (2)

1. HEAT AND POWER INSTALLATION, comprising a boiler, coupled in pairs with a turbine, to the condenser of which are connected pipelines for supplying and discharging cooling water, a gas-flow turbine connected between high and low pressure pipelines, and a heater for gas burned in the boiler, characterized in that, for the purpose of increase efficiency, the heater is installed after the gas flow turbine and is connected via a heating medium to the cooling water supply pipe. 2. Installation according to π. 1, characterized in that the gas flow turbine has a group of stages of different initial pressures, each of which has a gas heater connected via a heating medium to the cooling water supply pipe, e 1231237 A1