某既有热网供热能力提升改造方案比选

Comparison and Selection of Upgrading and Reconstruction Schemes for Heating Capacity of an Existing Heat-supply Network

在考虑热网承压能力、项目用地等前提下,对比大温差供热方案、设置中继泵站方案以及热网末端部分热力站安装分布式变频泵方案。大温差供热方案包括热力站连接方式由间接连接改造成混水连接,热力站板式换热机组改造成吸收式换热机组。经技术经济性比较,热网末端部分热力站安装分布式变频泵方案比较理想。改造方案实施以来,满足了新增供热面积的接入,热网运行平稳,未出现超压情况。

Under the premise of considering the pressure bearing capacity of the heat network and the project land, the scheme of the large temperature difference heating, the scheme of setting up relay pumping station and the scheme of installing distributed variable frequency pumps in some substations at the end of the heat-supply network are compared. The large temperature difference heating scheme includes the reconstruction of connection mode of the substation from indirect connection to water-mixing direct connection, and the reconstruction of plate heat exchanger u- nit into an absorption heat exchanger unit. Through the technical and economic comparison, it is ideal to install distributed variable frequency pumps scheme in some substations at the end of the heat-supply network. Since the implementation of the reconstruction scheme, the connection of the new heating area has been met, and the heat-supply network has been operating smoothly without overpressure.