RU2020383C1 - Method of heat supply - Google Patents

Abstract

FIELD: steam heat supply system of heating-and-power stations. SUBSTANCE: steam is delivered from the turbine into a steam duct then into the User's heat exchanger of hot water supply. Then cold water is delivered from the User's inlet of water mains into piping and heat exchanger and further into hydrants. Condensate is returned from the heat exchanger through the User's condensate duct into collecting condensate duct and thence to the station. Cold water taken from the User's inlet of the water mains is heated in advance in additional heat exchanger connected by heat carrier line to the User's condensate duct. Heated water is directed in parallel into the User's heat exchanger and cold water hydrants through main cold water pipes. Water temperature in pipes is maintained above the dew point temperature. EFFECT: higher efficiency. 1 dwg

Description

 The invention relates to a power system and a public utility energy and can be used in steam heat supply systems from thermal power plants.

 A known method of supplying heat to consumers, including supplying steam from a turbine take-off to a single pipe steam line to consumers, supplying steam from a steam line to subscriber hot water heat exchangers, supplying cold water from a water pipe to subscriber inlet pipelines, from the latter to subscriber main cold water pipelines and pipelines to subscriber heat exchangers hot water supply, hot water preparation in subscriber heat exchangers, hot and cold water supply to water taps, return condensate from the heat exchangers in the condensate collecting on the subscriber condensate, condensate return to the station of precast condensate (Sokolov EY heating system and heating networks. M .: 1982, pp. 77-78).

 The disadvantage of this method is the low efficiency of heat supply to consumers caused by seasonal fluctuations in the temperature of cold water, as a result of which there are fluctuations and an increase in the consumption of hot water, coolant (steam), fuel, gas from gas pipelines, electricity from power grids, expenses for makeup and water treatment, costs for cooling systems for turbine condensers, condensation on the surface of cold water pipelines, increased environmental pollution by fuel combustion waste.

 A known method of heat supply to consumers with water heating networks, including the supply of steam from a turbine selection to the station heat exchangers of network water, the supply of network water through the supply heat pipe to consumers, the return to the station of chilled network water via the return heat pipe, the supply of network water to the subscriber hot water heat exchangers, supply cold water to the pipelines of subscriber inputs, from the latter to subscriber main pipelines of cold water and pipelines to subscriber heat exchangers water supply, cold water heating of subscriber inlet pipelines in additional heat exchangers, through a heat carrier included in reverse subscriber heat pipelines, while in subscriber main pipelines of cold water the water temperature is maintained above the dew point temperature, the supply of hot and cold water to the water taps.

 This method allows you to use the heat carrier of the return heat pipes (return network water) for seasonal heating of cold water and increase the efficiency of heat supply to consumers with water heating systems.

 The aim of the invention is to increase the efficiency of heat supply to consumers by seasonal heating of cold water with the heat of condensate pipelines.

 This goal is achieved in that in a heat supply method comprising supplying steam from a turbine offtake to a steam line to consumers, supplying steam from a steam line to subscriber hot water heat exchangers, supplying cold water to subscriber inlet pipelines, from the latter to subscriber main cold water pipelines and pipelines to subscriber heat exchangers for hot water supply, the preparation of hot water in subscriber heat exchangers for hot water supply, the supply of hot and cold water to water faucets, returning condensate from subscriber heat exchangers through subscriber condensate pipelines to a collection condensate line, returning condensate to a station through a pre-assembled condensate pipeline, at the subscriber inlets, cold water is heated using additional heat exchangers installed on the pipelines of the cold water subscriber inlets and through the heat carrier included in the subscriber condensate pipelines, from additional heat exchangers, water is supplied to the entrances to subscriber hot water heat exchangers and subscriber -sectoral cold water pipes in which water temperature is maintained above the temperature "dew point".

 The invention is as follows.

 Cold water preheated by the heat of condensate in an additional heat exchanger is disassembled by water taps, which leads to a reduction in the consumption of hot water, heat carrier (steam), gas, electricity from electric networks, metal consumption of engineering systems, the consumption of other resources, and also to reduce environmental pollution. The set of features associated with the heating of cold water in additional heat exchangers by the heat of the condensate pipelines is substantial and sufficient.

 The drawing shows a heat supply scheme that implements the method.

 The system comprises a steam turbine 1, a single pipe 2, a subscriber hot water supply heat exchanger 3, a water supply 4, a subscriber input pipe 5, a subscriber main cold water pipe 6 with a temperature controller 7, a pipe 8 to a hot water heat exchanger, water taps 9 and 10, a subscriber condensate conduit 11, additional heat exchanger 12 and prefabricated condensate conduit 13.

 The system operates as follows.

Steam from the turbine 1 through the steam line 2 is supplied to consumers. Cold water from the water supply pipe 4 through a subscriber pipeline 5 enters an additional heat exchanger 12, where it is heated by the heat of condensate from the subscriber condensate pipe 11 from a temperature t _x to a temperature t _x ', then it is supplied to a pipe 8 to the inlet to the heat exchanger 3, and also to a main subscriber pipe 6 cold water. In the heat exchanger 3, the water is heated by steam to the calculated temperature of hot water supply and is supplied to the water taps 9. Through the pipeline 6, cold water is supplied to the water taps 10, and the temperature of the cold water is maintained by the temperature controller 7 at a level t _x '> t _p , which eliminates the formation of condensate on the surface of cold water pipelines, where t _p is the dew point temperature. From the additional heat exchangers 12, the condensate enters the prefabricated condensate line 13 and is supplied to the station through it.

Claims (1)

 METHOD OF HEAT SUPPLY, including supplying steam from a turbine selection of a thermal station to a steam line and then to a consumer hot water supply heat exchanger, supplying cold water from a water supply subscriber input to pipelines to a hot water supply heat exchanger and then to water taps, condensate return from a subscriber heat exchanger via a subscription condensate pipe in a pre-assembled condensate line with the subsequent direction of condensate to the station, characterized in that the cold water from the subscriber the water inlet is preheated in an additional heat exchanger connected via a heat transfer medium to the subscriber condensate pipeline, while heated water from the additional heat exchanger is sent in parallel to the subscriber hot water supply heat exchanger and to cold water taps through cold water main pipelines, the water temperature being maintained above the point temperature dew.

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