SU1728577A1 - Boiler unit of heat-electric generating plant - Google Patents

Abstract

Invention m. B. used in heat and power engineering, namely in boiler installations of combined heat and power plants. SUMMARY OF THE INVENTION: A boiler plant comprises a power plant with a steam pipe connected to a turbine and peak boilers connected by a bypass duct. To reduce the steam generating capacity of the power boiler and the turbine's electric power, an additional mains heater is installed in the heating medium in the bypass gas duct and connected in the heated medium to the heat supply line between the turbine mains heater and the peak boiler. 1 il.

Description

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WITH

The invention relates to a power system and allows to increase the efficiency and maneuverability of heat-generating turbines during unloading.

A boiler installation is known, containing energy and peak boilers, the furnaces of which are connected by a bypass duct.

The disadvantage of this installation is the low efficiency and maneuverability when using heat and power plants during hours of deep discharge of electrical power at night with a given heat release to the consumer.

A known installation for regulating the heat load during peak hours of electrical loads, which distributes the heat, the load between the turbines with a margin and without a margin for the passage of steam into the condenser.

A disadvantage of the known installation is the low efficiency and maneuverability due to the impossibility of deep unloading of electricity generation, the installation is aimed at the generation of peak electrical power.

The aim of the invention is to increase the efficiency and maneuverability of cogeneration turbines during unloading on electric traffic.

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

The power boiler 1 is connected by a steam line to a turbine 2, which is connected by a steam line to a network preheater of the turbine 3. The network pump 4 is connected by pipeline 5 to the network heater 3 and the gas network heater 6. The gas network heater 6 is connected by the flue 7 to the furnace of the power boiler 8

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and a furnace 12 of the peak boiler and circled bypass 21 with gate 10. Through the mains water, the gas mains heater 6 is connected by pipeline 22 to the peak boiler 13, which is connected by pipeline 23 to the heat consumer 24. The pipeline is connected to the network pump 4. The gas duct 7 has a gas gate 15, which is surrounded by a bypass with a smoke exhauster 11 and a gate 14. The power boiler 1 is connected by a duct 16 to a chimney 20. Peak boiler 13 is connected by a duct 17 to a pipe 20, Smoke exhausters 18 and 19 are located on the ducts 16 and 17.

Boiler installation works as follows.

To reduce the electric power of the heat and power plant, the steam consumption from the power boiler 1 to the turbine 2 and is reduced. steam extraction on the grid heater 3 turbines. In this connection, the temperature of the supply water after the grid preheater of the turbine 3 decreases. Accordingly, the consumption of combustible fuel at the power boiler 1 is reduced. To heat the network water to the required parameters, the network pump 4 through the pipeline 5 supplies the network gas to an additional gas network heater b heated by gases taken from the top of the furnace 8 of the energy boiler 8. boiler 1. When this gate 9 is open, and the gate 10 is closed.

The cooled gases from the additional gas mains heater 6 are sucked off by the exhaust fan 11 into the furnace 12 of the peak boiler 13. In this case, the gate 14 is open and the gate 15 is closed.

The flue gases from boilers 1 and 13 through ducts 16 and 17 are removed with smoke exhausters 18 and 19 into chimney 20.

The gas supply through the flue 7 is also carried out in the absence of burning fuel into the furnace 12 of the peak boiler 13 when the additional gas mains heater is disconnected by the gate 9 and the bypass line 21 is turned on by the gate 10.

Heated mains water from an additional gas mains heater 6 by

pipeline 22 of the network water passes into the peak boiler 13, where it is heated to the required parameters according to the temperature schedule of the heating network and sent through pipeline 23 to the heat consumer

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When electric load on turbine 2 is restored to nominal values, additional gas mains preheater 6 is simultaneously disconnected using gate 9 and turning on bypass 21 by opening gate 10, and by supplying water by closing valve 25 and turning on bypass line 26, opening gate 27. Load turbine mains heater 3 by selecting steam from turbine 2 by increasing the steam capacity of power boiler 1 by additional combustion of fuel.

Claims (1)

Invention Formula A boiler plant of a combined heat and power plant containing an energy boiler with a steam pipe connected to a heat and power generation turbine, the steam extraction of which is connected to a network heater installed on the heat supply line, including a peak hot water boiler, which is designed to increase efficiency and maneuverability, it is equipped with an additional network the heater, energy and peak boilers are connected to the bypass duct with the exhaust fan, with the additional gas mains heater installed in the heating medium in the bypass gas duct and connected in the heated medium to the heat supply line between the turbine mains heater and the peak boiler.