SU924414A1 - Steam power unit - Google Patents

Description

The invention relates to a power system and can be used in thermal power plants, which take part in the regulation of the load curve of power systems.

A steam-powered installation is known, containing a hot water accumulator, included in the feedwater path, perceiving excess heat during the period of reduced loads 1.

The disadvantage of such an installation is the need to deaerate cold water before it enters the battery, as well as the use of hot water from the battery directly in the cat-nourishment circuit. la, which places high demands on the quality indicators of the water itself.

A steam-powered installation is also known, containing a boiler, a steam turbine with sampling pipes connected to feedwater path heaters, and a heat exchanger connected to a cold tank and a hot water accumulator 2.

The main disadvantage of the known installation is the mixing of the accumulator water with the turbine condensate downstream of the condenser. In addition, hot water of the battery can not always be used to feed the boiler, since the need for it, especially for boilers of condensation stations, is very limited. In the presence of heat outside consumers, this installation does not allow to influence the configuration of the source load curve

10 heat.

The purpose of the invention is to increase the maneuverability and efficiency of the operation of the steam power plant.

This goal is achieved by

15 that the plant is equipped with an additional water heat exchanger included in the feedwater path and communicated with the cold tank and the hot water accumulator.

20

The drawing shows a diagram of the steam power plant.

The steam-powered unit contains a boiler 1, a steam turbine 2 with steam extraction pipelines 3 connected 25 to high and low pressure heaters 4 and 5 (LDPE and HDPE) of feed water line with condensate and feed pumps 7 and 8. By means of steam extraction pipes 3 ,

30 valves 9 and 10 are connected to a heat exchanger 1-1, summarized by pipelines 12 and 13 with a cold tank 14 and a hot water accumulator 15, which are interconnected by a pipe 16. Heat exchanger 11 is connected through a drainage system of heating steam by a steam pipeline, 17 to a tractor 6 feed water, which includes an additional water-cooled heat exchanger 18, connected by pipelines 19 to the cold tank 14 and pipe 20 through the circulation pump 21 and pipe 16 to the hot water accumulator 15. The installation is equipped with valves 22-28, and an additional water-cooled heat exchanger 18 bypass 29. If there is excess steam (from the internal regeneration or heat extraction pipe 3), it is used to submerge the water in the heat exchanger 11 supplied from the cold water tank 14 circulating pump 21 into the accumulator 15 of the BTA hot water; In this case, the valves 9, 10, 25 and -26 should be open, and the valves 27 and 28 should be closed. When the required water temperature in the accumulator of 15 g of spraying water and its filling reaches, the water supply through the heat exchanger 11 is stopped. If it is necessary to generate additional electric energy in peak mode, undersupply of the heat from the selected steam to heat the HDPE water is compensated by using hot water from the batteries. Hot water runner 15 for heating turbine condensate in an additional water heat exchanger 18, when water is heated in which hot iodine from the accumulator 15 is pumped by a circulation pump 21 Through an additional water-to-water heat exchanger 1B and discharged, chilled, into the cold water tank 14. Valves 27 and 28 should be open, and 9, 10 ,, 25 and 26 - closed. When charging the accumulator 15, the hot condensate water to the entrance of the LDPE 5 is passed through in addition to the additional water-based heat exchanger 18 via the bypass 29. As a result of the regularization of this steam power plant with heat accumulation, the number of start-ups and shutdowns of the power equipment is reduced, a long-term decrease. operation at reduced loads, and at the same time reducing the cost of fuel for these purposes and reducing the duration of electrical energy generation in the condensation mode of the turbogenerator by increasing the steam extraction for heating the water stored in the accumulator. At the same time, savings are achieved due to more complete utilization of the maneuvering properties of the plant when obtaining additional electrical power by temporarily unloading the heat extraction charges with simultaneous compensation from the accumulator of heat not allowed by the turbine. The Parosilov Invention Formula, comprising a boiler, a steam turbine from a pipeline of tapes connected to feedwater preheaters, and a heat exchanger communicated with a cold water storage tank for hot water. , that, in order to increase maneuverability and efficiency, the plant is equipped with an additional water-cooled heat exchanger included in the feedwater path and communicated with the cold water tank and the hot water accumulator. Sources of information taken into account in the examination 1. For the FRG No. 2620023, class F 01 K 3/00, published. 1977. 2. For the German Federal Republic No. 2609622, cl. F 01 K 3/00, publ. 1977 (prototype).

Claims (1)

Claims J A steam-powered installation containing a boiler, a steam turbine with sampling pipelines connected to heaters of the feed water path cost-effectiveness, the installation is equipped with an additional water-to-water heat exchanger included in the feed water path and in communication with the cold tank and the hot water accumulator.