Water-mixing high-temperature-difference heat supply equipment and heat supply method

Abstract

The invention discloses water-mixing high-temperature-difference heat supply equipment and method. The water-mixing high-temperature-difference heat supply equipment comprises a first heat pump, wherein the first heat pump comprises a first heater, a second heater and a first cooler; secondary water return water of a downstream heat user comprises first-path return water and second-path return water; primary water supply water of an upstream heat source, and the first-path return water are heated via the first heater and the second heater separately, and are collected to form collected water,and the collected water is output to the downstream heat user; and the second-path return water is cooled via the first cooler and output to the upstream heat source. The water-mixing high-temperature-difference heat supply equipment and method are capable of carrying out high-temperature-difference heat supply in a relay power station, and the temperature of primary return water is lowered on thepremise of ensuring the heat supply parameters of the downstream heat user; and meanwhile, the temperature of the return water is further lowered, the temperature difference between the supply waterand the return water is increased, and the transmission and distribution energy consumption of a trunk network is reduced by adequately utilizing the many energy of gas, steam, electric energy and thelike existing in the relay power station.

Description

technical field [0001] The invention belongs to the technical field of heat supply, and in particular relates to a water mixing type large temperature difference heat supply equipment and a heat supply method. Background technique [0002] With the continuous increase of urban heating area and the rapid growth of heat load demand, the existing pipeline network of central heating system has been difficult to meet the demand due to the limitation of flow and temperature. In order to meet the heating requirements, it is necessary to start from the two aspects of increasing the flow rate or increasing the temperature difference. However, increasing the flow rate requires re-laying pipelines, which is very costly in cities with dense traffic. Therefore, only by increasing the temperature difference between the heating supply and return water can the transmission and distribution capacity of the pipeline network be increased to meet the heat load without changing the flow rate. d...

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Problems solved by technology

In addition, many central heating system heat exchange stations have been built, and the general layout is compact, and it is impossible to install decentralized large temperature difference heat exchange equipment, which is also a limiting condition for large temperature difference transformation

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