Centralized heating large temperature difference centralized combined type cascade heat exchange pressure isolation station

Abstract

The invention discloses a centralized heating large temperature difference centralized combined type cascade heat exchange pressure isolation station. The effect that primary net return water temperature is stably lowered under the condition that a pressure isolation function of the pressure isolation station is met is achieved. Under the condition that the pressure isolation function of the pressure isolation station is met, the primary net return water temperature can be stably lowered as required, waste heat of a power plant can be fully utilized, heating capacity of a unit is improved, andheating energy consumption and cost are lowered. High secondary-level net water supply temperature can be provided by a cascade heating system, and heat exchange requirements of all heating stationsof a secondary-level net are met. High and low temperature heat storage water tanks and a water charging system are arranged, redundant heat of a heat source can be stored in the heat load valley period of a heating supply system and is released in the peak period, the heat supply network can be coordinated, the heat loads of the heat supply network are balanced, and heating capacity of the heating supply system is improved.

Description

technical field [0001] The invention relates to a centralized heat supply system for cogeneration of heat and power, in particular to a centralized pressure-isolation heat exchange station set up when the height difference of a long-distance heat supply pipeline is large. Background technique [0002] There are more and more long-distance transmission heating projects (hereinafter referred to as long-distance heating supply) in the central hot water heating system of cogeneration. In order to achieve the economy of heat energy transmission and make full use of the waste heat of power plants Thermal requirements The temperature difference between the supply water and the return water of the hot water delivery pipeline is greater than the temperature difference between the supply water and the return water of the conventional centralized hot water heating. When the return water is 60°C-50°C, the required temperature difference between the supply water and the return water is 5...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a centralized combined cascade heat exchange and pressure isolation station with large temperature difference for central heating, which solves the technical problem of how to stably reduce the return water temperature of the primary network under the condition of satisfying the pressure isolation function of the pressure isolation station

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