SU1562478A1 - Maneuverable power generation and central-heating unit - Google Patents

Abstract

The invention relates to the field of power engineering and can be used for heat and power generation units. The purpose of the invention is to increase the efficiency with electrical discharges while maintaining heat consumption, reliability and noise reduction. In the electric discharge mode, the secondary heater 14 is used as heating steam of the network heater 14, to the input of which, through the heating medium, part of the steam is supplied from the boiler 1 with a corresponding decrease in steam consumption to the turbine 2. Condensate of the heating steam is supplied by pump 19 to the feed water pipeline 13 the boiler. The steam converter 15 is powered by water from the deaerator 10. In case of installing an intermediate steam heater (PP) 22 in the electric unloading mode of the power unit, part of the secondary steam of the steam converter 15 enters the input of the PP 22, ensuring its reliable cooling, and after it is fed to the input of the network heater 14 together with the main heating steam coming from the steam converter 15. 1 Cp f-ly, 2 ill.

Description

The invention relates to a power system and can be used for heat and power units,

The purpose of the invention is to increase the efficiency of the power unit during electrical discharges while maintaining heat consumption, reliability and noise reduction.

FIG. 1 is a diagram of a manned heat and power unit; in fig. 2 is a diagram of a maneuverable heat and power unit equipped with an intermediate superheater.

The power unit contains a boiler 1, a turbine 2 comprising a high pressure cylinder 3 (HPC) with a block 4 of high-pressure porn-regulating valves and cylinders 5 of medium (CCD) and low pressure pressure cylinder with a block of 6 stop-regulating valves of an average pressure, condenser 7, condensate pump 8, low pressure preheaters 9, deaerator 10, feed pump 11, high pressure preheaters 12, boiler feedwater pipe 13, network preheater 14, steam generator 15, pipe 16 | supplying steam to a steam generator 15 with a valve 17, steam pipe 18 secondary steam, pump 19, hydraulic pump 20 pump 19, feedwater supply pipe 21 from the deaerator 10 to the steam converter 15, intermediate steam superheater (PP) 22, pipe 23 supplying steam to PP 22 with a check valve 24 installed on it, pipe 25 for evacuating steam from PP 22, pipeline 26 for supplying steam from PP 22 to a network heater 14.

The maneuverable heat and power unit (Fig. 1) operates as follows.

In normal production mode

by the electric power unit, fresh steam from boiler 1 through block 4 of high-pressure stop-regulating valves enters HPC 3, and from it through block 6 of medium-pressure stop-regulating valves in DDC and low-pressure cylinder 5 of turbine 2, steam from whose collection enters the network heaters 14.

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Condensate spent in the turbine 2 and cooled in the condenser 7 steam by a condensate pump 8 through low pressure heaters 9 is supplied to deaerator 10, from which feed pump 11 through high pressure heaters 12 is fed to the boiler 13. In the mode of electrical unloading of the power unit with preservation of heat consumption, part of the hot steam is removed through conduit 16 through the open valve 17 to the steam converter 15 with a corresponding decrease in steam consumption to turbine 2 to the minimum limit value determined by reliable operation of the turbine flow section, and the secondary steam - the distributor 15 is supplied via steam line 18 to the network heater 14. The heating steam condensate of the steam converter 15 is pumped into the feed water line 13 by the pump 19 otla and power paropreobrazova- bodies 15 is effected with water from deaerator 10 through conduit 21, wherein the feeding portion 15 is provided paropreobrazovate- l water supply from

 the deaerator 10 with the feed pump 11 to the pipe 21, this activates the hydraulic drive 20 of the pump 19. To limit the possible flow of water after the hydraulic drive 20 to the deaerator 10, a throttle washer can be installed on the pipeline. When using a motor-driven pump 19, the steam-transducer 15 from the diaerator 10 will be powered only via pipeline 21, the throttle washer is not installed.

In the case of a maneuverable heat generation unit with an intermediate superheater, the steam after HPC 3 through conduit 23 through the check valve 24 enters PP 22, and from there through conduit 25 through block 6 the control valves are sent to the DSC and LPD 5 of the turbine 2. In Pe1 The press of electrical unloading and the need to ensure reliable cooling of the PP 22 a part of the secondary steam from the converter 15 from the steam pipe 18 enters the pipeline 23 and supplies the plr to the PP 22, and after it through pipes 25 and 26 is mixed into the main heat a pair of mains heater 14,

coming from the steam converter 15 through the steam line 18.

Claims (2)

1. A maneuverable heat and power unit containing a boiler, connected by feedwater pipes through a pump with a deaerator and direct steam to a high-pressure turbine cylinder, an intermediate superheater, a network heater, characterized in that, in order to improve efficiency during electrical unloading with preservation of heat consumption, reliability and noise reduction, the power unit is equipped with a steam converter, made in the form of a surface 15 1562478 0 heat exchanger, the inlet of which is connected to the hot steam pipeline via heating valves, and the condensate outlet of heating steam through the pump is connected to the boiler feedwater pipeline, and the surface heat exchanger is connected to the deaerator through the feedwater and the secondary steam outlet to the network heater. 2. The power unit according to claim 1, characterized in that the output of the surface heat exchanger on the secondary steam is additionally connected to the intermediate superheater, and the input through the heating medium of the network preheater to the output of the intermediate superheater. I  12 Gr. parisotbor turbines 1