Secondary pump system of heat supply and exchange station

The utility model relates to a secondary pump system of a heat supply heat exchange station, which is characterized in that a primary net water supply pipeline is connected with a primary net secondary pump and then is connected with one end of a plate heat exchanger together with a primary net water return pipeline, and the other end of the plate heat exchanger is connected with a secondary net water supply pipeline and a secondary net water return pipeline; and a second-stage net circulating pump is arranged on the second-stage net water return pipeline. According to the system, the heat supply requirement of the tail end heat exchange station can be met under the conditions that the heat source circulating pump is not replaced and energy consumption and investment are not increased. 本实用新型涉及一种供热换热站二级泵系统，包括：一级网供水管道上连接一级网二级泵后，与一级网回水管道共同与板式换热器的一端连接，所述板式换热器的另一端与二级网供水管道和二级网回水管道相连，所述二级网回水管道上有二级网循环泵。该系统能够在不更换热源循环泵，不增加能耗及投资的情况下，保证末端换热站的供热需求。