A forced recirculation water tube steam boiler system and its operation method

Abstract

The invention provides a forced recirculation water tube steam boiler system and its operation method, comprising the steps of setting a float water extractor in the water tank, the float water extractor is connected to the condenser through the boiler feed water pipeline, the boiler feed water pump is connected in series on the boiler feed water pipeline, and the condenser passes through The water supply pipe is connected to the buffer liquid level control tank, the buffer liquid level control tank is connected to the water inlet of the boiler body through the high temperature water supply pipe, the high temperature circulation pump is connected in series to the high temperature water supply pipe, and the water inlet of the boiler body is connected to the burner plate and the square coil of the furnace. The furnace square coil is connected to the tail collection header, the tail collection box is connected to the finned downpipe economizer, the finned downpipe economizer is connected to the bottom confluence header, the bottom confluence header is connected to the furnace boiling riser, and the furnace boiling riser Connect the top collecting header, the steam-water mixing outlet of the top collecting header is connected to the steam-water separator through the steam-water mixing pipe, and the liquid outlet of the steam-water separator is connected to the buffer level control tank through the return pipe.

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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