CS274973B2 - Connection for heating water's three-stage heating regulation - Google Patents

Abstract

The solution falls within the branch of automation of control of heating of heating water in extraction steam turbines. Its purpose is to increase the economy of heating process. The principle of the solution consists in the connection arrangement, in which sensors of a module (1) of input signals act on a circuit (21) of the regulation variance of the temperature of the heating water and on the circuit (26) of a logical control, which are interconnected with the first coupled regulator (22) replacing the previous two independent regulators (R1, R2) and with the first signal distributor (24). The outputs of this signal distributor (24) are connected with switches (33, 34, 35, 36), whose further inputs are simultaneously connected to circuits (31, 32) of manual control. The switches are connected to a module (4) of output signal converter, which already influences by-pass and bleeding armatures (5, 6, 7, 8) of the turbine and OTV. This interconnection constitutes a three-stage heating of heating water, controlled by a single regulator, which processes the only regulation variance between the preset and the real temperature on the outlet from the third water heater, which is automatically activated only in cases, when the first two heaters do not satisfactorily fulfil their function.<IMAGE>