Energy -conserving heat supply unit

The utility model discloses an energy -conserving heat supply unit, including main steam turbine and the heating network heater through extraction steam lines and main steam turbine intermediate pressure cylinder intercommunication, the last heat supply butterfly valve that is provided with of extraction steam lines, the second exit end of heat supply butterfly valve passes through the lateral conduit and feeds through to main steam turbine low pressure jar, is provided with two three -way valves on the lateral conduit, feeds through the bypass pipe setup hot small steam turbine that gains merit between two three -way valves through the bypass pipeline, the hot small steam turbine's of merit side is provided with monitoring devices, and heat supply unit's DCS controller is connected to monitoring devices's output, the input of DCS controller still with the connected signal of heat supply butterfly valve, the output of DCS controller is connected to the controlled end of heat supply butterfly valve. The utilit