SU1495582A1 - Heating system house service pipe - Google Patents

Abstract

The invention relates to a power system and is intended for use in district heating systems for residential, public and industrial buildings. The purpose of the invention is to increase the reliability of the system by eliminating scale formation in the heat exchange surfaces of preheaters and internal corrosion of pipelines. For this, the heating side entrance of the second stage 5 of the preheater is additionally connected to the return pipe 2 by means of a mixing device 6. As the outside air temperature in the mixing device 6 decreases, the temperature of the water coming from the supply pipe 1 decreases due to the mixing of water from the return pipe 2, which provides admission to the second stage 5 of the preheater of heating mixed water with a constant temperature (about 70 ° C) during the warm and cold periods of the heating season a. 2 Il.

Description

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The invention relates to a power system, namely to district heating systems, mainly residential, as well as public and industrial buildings.

The purpose of the invention is to increase reliability by eliminating scale formation in the heat exchange surfaces of preheaters and internal corrosion of pipelines.

FIG. 1 shows subscriber input with a temperature controller as a mixing device; in fig. 2 - the same, with an elevator as a mixing device.

Subscriber input contains supply 1 and return 2 heat supply pipelines connected through the mixing device 3 to the heating system, the first

4 and the second 5 stages of the preheater of the hot water supply system, the inputs of the heating sides of the said heaters being connected respectively to the return 2 and supply 1 pipelines of the heat supply. The entrance of the heating side of the second stage of the preheater is additionally connected to the return pipeline 2 for heat supply by means of a mixing device 6.

In addition, the subscriber input contains cold 7 and hot 8 water pipelines, a flow controller 9 and shut-off and control valves 0-15.

Subscriber input works in the following way.

The heat network water flows through the supply line 1 to the subscriber input, where it branches out. Part of the water enters the second stage 5 of the preheater of the hot water supply system through the inlet of the heating side, and the other part of the water through the mixing device 3 enters the water heating system, where, returning heat, returns to reheat. The water from the return pipe 2 also flows through the mixing device 6 to the inlet of the heating side of the second stage

5podogrevatel. In the mixing device

6, the water acquires a temperature of about 70 ° C, corresponding to the minimum temperature mode in the heat supply flow pipe 1 (break point of the temperature graph), on which the heating surface of the preheater is calculated.

Cold tap water flows through conduit 7 to the first stage 4, where it is partially heated with return water from the heating system, and then tap water passes through the second stage 5 of the preheater, heats up to 60-65 ° C, and through pipeline 8 enters the hot water supply system of consumers .

Thus, connecting the input of the heating side of the second stage 5 of the hot water heater to the return pipeline 2 of the heat supply through

The mixing device 6 allows to reduce the temperature of the water coming from the supply pipe 1, as a result of which the heat exchange between cold tap water and gray water mixed water occurs at temperatures that prevent the formation of scale in the heat exchanger surfaces of the heater and prevent the formation of internal corrosion of the pipeline.

In addition, the presence of a mixing device 6 during the warm and cold periods of the heating season ensures that the displaced heating water with a constant temperature (about 70 ° C) enters the second stage by supplying water during the warm period of the heating season mainly from the supply line 1, and during the cold period - from the return pipeline 2, which contributes to the stabilization of the temperature of the water flowing into the hot water supply system through the pipeline 8.

5 With a specific implementation of subscriber input, devices such as a temperature controller (Fig. 1) or an elevator (Fig. 2), manufactured by industry, can be used as mixing devices 6. In the absence of ready mixing devices, the input of the heating side of the second stage of the hot water preheater is connected to the supplying 1 and return 2 heat supply pipelines by means of separate piping with valves installed on them (valves, non-return valves).

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Claims (1)

Invention Formula 40 A subscriber input containing heat supply and return pipelines connected to the heating system, cold and hot water pipelines connected to the first and second stages 45 of the heaters are hot water supply systems, the inputs of the heating sides of the said heater stages are connected respectively to. Heat supply return and supply pipelines, characterized in that, in order to increase reliability by eliminating scale formation in the heat exchanger surfaces of the preheater and internal corrosion of the pipelines, the heating side entrance of the second stage is additionally connected to the return pipe by means of a mixing device. Tg FI.2