Forced recirculation water pipe steam boiler system and operating method thereof

Abstract

The invention provides a forced recirculation water pipe steam boiler system and an operating method thereof. A floater water carrier is arranged in a water tank, the floater water carrier is connected to a condenser through a boiler water supply pipeline, a boiler feed pump is connected in series to the boiler water supply pipeline, the condenser is connected to a buffer liquid control tank through a water feeding pipeline, the buffer liquid control tank is connected to a water inlet of a boiler body through a high-temperature water supply pipeline, a high-temperature circulation pump is connected in series on the high-temperature water supply pipeline, the water inlet of the boiler body communicates to a burner plate and a square coil pipe of a hearth, the square coil pipe of the hearthis connected to a tail gathering header, the tail gathering header is connected to a fin type downcomer economizer, the fin type downcomer economizer is connected to a bottom converging header, the bottom converging header is connected to a boiling ascension pipe of the hearth, the boiling ascension pipe of the hearth is connected to a top gathering header, a steam-water mixing outlet of the top gathering header is connected to a steam-water separator through a steam-water mixing pipeline, and a liquid outlet of the steam-water separator is connected to the buffer liquid control tank through areflow pipeline.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a boiler, in particular to a forced recirculation water tube steam boiler system and its operating method. Background technique [0002] Water tube boilers are also called natural circulation boilers and forced circulation boilers. The water tube boiler is that the flue gas generated after fuel combustion flows through the water pipe to heat the boiler water or the steam-water mixture in the water pipe. The basic structure is a corner tube furnace with a tube frame structure or a forced circulation water tube boiler composed of multiple sets of coils. The heat generated by combustion or flue gas is transferred to water through the water tube wall. [0003] The existing once-through forced circulation boiler has the problem of insufficient flow in the tube during small-load operation, resulting in uneven distribution of water flow on the heating surface or too low flow rate, resu...

AI Technical Summary

Problems solved by technology

[0003] Due to the insufficient flow in the tube of the existing once-through forced circulation boiler when the load is running, the heating surface of the heating surface is unevenly distributed or the flow rate is too low, which causes the heating surface of the furnace tube to be overheated and damaged.

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