Middle-low pressure steam heat supply system on waste heat boiler side

Abstract

The invention discloses a waste heat boiler side medium and low pressure steam heat supply system, and relates to the technical field of boiler heat supply. The vaporization module comprises water for a deaerator, a low-pressure steam pocket, a low-pressure acting unit, a pressurizing unit and a high-pressure acting unit; the heat supply module comprises a heat supply unit and a medium-pressure acting unit, the low-pressure acting unit comprises a low-pressure evaporator and a low-pressure superheater which are arranged on the low-pressure steam pocket, and a low-pressure cylinder arranged on the low-pressure superheater; water for the deaerator is conveyed to the low-pressure evaporator through the low-pressure steam pocket, the low-pressure evaporator heats the water into low-pressure steam, the low-pressure steam is overheated through the low-pressure superheater, and finally the low-pressure cylinder is pushed to do work to achieve power generation. According to the system, steam is extracted from the waste heat boiler side to supply heat through existing equipment of the unit, the heat supply requirement is met, a large amount of transformation cost needed by heat supply of the steam turbine side is saved, and only a small amount of equipment is needed. According to the heat supply scheme provided by the invention, unit operation economy, safety and heat supply cost optimality are fully considered.

Images