Boiler blower inlet air heating system

Abstract

The invention relates to the field of the boiler blowing-in technology, and discloses a boiler blower inlet air heating system. The boiler blower inlet air heating system comprises a heat exchanger, a steam extraction pipeline, a vacuumization pipeline, a vacuum pump, a blowing-in box, a blowing-in pipeline, a condensation water pipeline, a drain pipeline and a condensate pump. The two ends of the steam extraction pipeline are communicated with an air-cooling main steam extraction pipeline and the heat exchanger respectively, the two ends of the vacuumization pipeline are communicated with the heat exchanger and outside air respectively, the vacuumization pipeline is provided with the vacuum pump, the two ends of the condensation water pipeline are communicated with the heat exchanger and a condensation water system respectively, the drain pipeline is respectively communicated with the steam extraction pipeline and the condensation water pipeline, the condensation water pipeline is provided with the condensate pump, and the blowing-in box is respectively communicated with the heat exchanger and the blowing-in pipeline. Cold air flowing through the heat exchanger is heated through steam exhaust waste heat of a steam turbine, steam consumption of an original steam air heater system is greatly reduced, and utilization efficiency of steam exhaust waste heat of the steam turbine and economical efficiency of overall operation of a unit are improved.

Description

technical field [0001] The invention relates to the technical field of boiler air supply, in particular to an inlet air heating system of a boiler air supply system of the boiler air supply system. Background technique [0002] In the existing boiler air supply system, in order to reduce the low-temperature corrosion of the air preheater, a heater is installed at the inlet of the fan to increase the temperature of the air entering the air preheater and reduce the low temperature corrosion of the air preheater. corrosion. In actual operation, a single 600MW unit boiler primary fan and secondary fan inlets need to be equipped with two rotary steam heaters and drain tank equipment, which consume a large amount of steam during operation, which reduces the thermal efficiency of the whole plant and greatly reduces economy of unit operation. Contents of the invention [0003] (1) Technical problems to be solved [0004] The purpose of the present invention is to provide an air...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an air heating system at the inlet of the boiler blower to overcome the problem of large steam consumption in the prior art when heating the air at the inlet of the blower, and at the same time improve the waste heat utilization efficiency of air-cooled exhaust steam

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