A heating network hydrophobic recovery system and method

Abstract

The invention discloses a heat supply network drain recovery system and method. The heat supply network drain recovery system comprises a heat supply network heater, a first-level drain cooler, a drain flash tank and a condensate pump, wherein the heat supply network heater is connected with the first-level drain cooler, a second-level drain cooler is connected between the first-level drain cooler and the drain flash tank, the water inlet of the condensate pump is connected with a condenser hot well, and the water outlet of the condensate pump is connected with the second-level drain cooler; and at the same time, heat supply network drain water passes through the first-level drain cooler and the second-level drain cooler in sequence and then enters the drain flash tank, and meanwhile, the condensed water in the condensate pump flows through the second-level drain cooler and cools the heat supply network drain water. The heat supply network drain recovery system is simple in structure, different apparatuses run independently and stably, control is convenient, the water-level fluctuation of the heat supply network is effectively reduced, and capital investment at the earlier stage is reduced.

Description

technical field [0001] The invention belongs to the field of drainage recovery of a combined cycle unit, in particular to a system and method for drainage recovery of a heating network. Background technique [0002] In the combined cycle combined heat and power unit, the heat network heater heats the circulating water in the hot water supply system by using the extraction steam of the steam turbine or the steam (heating medium) drawn from the boiler to meet the requirements of the heating user, thereby realizing the thermoelectricity joint production. [0003] The cogeneration of heat and power by the heating network heater will cause the drainage of the heating network, such as figure 1 As shown, the hydrophobic recovery system in the prior art includes: a heating network heater connected to the heating network air extraction main pipe, a first-stage hydrophobic cooler, a heating network drainage pump, a condensate pre-pump, a condensate pump, and a condenser And the drai...

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Problems solved by technology

[0004] The existing control system is very complicated, the control parameters are mutually restrained, and the amount of equipment that needs to be adjusted is large. If any system fails, the adjustment of the entire system will be disordered, and the initial investment in the system is large, especially when the unit is running under back pressure. In the condenser, the condensate pre-pump can only operate as a make-up pump. When the unit does not need to make up water, the operation mode is difficult to adjust, and the system parameters are even more difficult to control

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