Heat supply system utilizing return water

Abstract

The invention discloses a heat supply system utilizing return water. The heat supply system utilizing the return water comprises a return-supply system and a return-return system. According to the return-supply system, the return water in a heat supply pipeline is pressurized through a circulation water pump and then supplies heat to a heating load, the return water after heating returns to supply water in the heat supply pipeline, a continuous thermodynamic cycle is achieved, and the purpose of heat supply is achieved. According to the return-return system, the return water in the heat supply pipeline is pressurized through the circulation water pump and then supplies heat to the heating load, and the return water after heating returns to the return water in the heat supply pipeline. On the basis of not affecting original normal heat supply, the heat supply return water is reused, part of heat exchange stations can be eliminated, a plurality of operation methods are provided, and the requirements of different loads and different temperatures are met, many problems about economy, technology and operation are effectively solved, and heat supply is achieved for some users lack of heat supply conditions.

Description

technical field [0001] The invention relates to a heating system utilizing return water. Background technique [0002] The return water heating system is used in heating and heating industries. There are many ways of central heating at home and abroad: such as direct hot water supply (water supply temperature is lower than 95 ℃), steam-water heat exchange, water-water heat exchange, ejector heating, mixed water heating, single-pipe heating etc. Among them, the indirect heating method of water-water heat exchange is widely used. In order to improve the heat medium transportation capacity of the heating pipe network, increase the heating scale and improve the economy, the heat source plant generally transports high-temperature hot water through the primary heating network (supply and return water temperature 110-150°C, return water 70- 90°C). If high-temperature water is used for direct heating, the sealing paint and seals of the heating facilities will quickly age and fail...

AI Technical Summary

Problems solved by technology

At present, most of them adopt the unreasonable operation mode of "low temperature, large flow" and "small temperature difference, large flow", resulting in high project cost, high power consumption, and high operating cost. There is a huge potential for energy saving in the national heating industry.

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