Closed circulating phase-change heat distribution system of industrial boiler

Abstract

The invention relates to an industrial boiler closed cycle phase transition heating system. A steam transmission hole of a boiler is communicated with a steam inlet of a gas-distributing cylinder by a main steam pipe, a steam outlet of the gas-distributing cylinder is sequentially communicated with heating equipment and a steam inlet of a secondary steam boiler by a steam main and steam branch pipe, the downstream of the steam main is provided with a standby pipeline, the pipeline of the main steam pipe is provided with a branch communicated with a water storage tank, water charging tanks areconnected with the heating equipment and the lower part of the secondary steam boiler, the water charging tanks are connected with a two-phase flow main pipe by an overflow pipe, a liquid outlet of the two-phase flow main pipe is communicated with a liquid inlet of a low-level liquid collecting tank, a liquid outlet of the low-level liquid collecting tank is communicated with the water storage tank by a high-temperature pump, and a water outlet of the water storage tank is communicated with a water inlet of the boiler by the high-temperature pump. When in running, the system can effectively preventing the outside air from permeating and the system equipment from being corroded by the gas. As phase transition heating circulation is carried out in the closed system by the steam generated bythe boiler, the whole high temperature condensed water can be recovered, and the heat energy utilization rate of the system can be improved.

Description

technical field [0001] The content of the invention belongs to the technical field of heating engineering equipment, and relates to a closed-cycle phase-change heating system for industrial boilers. Background technique [0002] At present, most of the known industrial boiler phase change heating systems are open systems, and the steam turns into condensed water after heat exchange in the system, and most of the condensed water and the secondary steam after depressurization cannot be effectively recovered by the system use. Although some heating systems equipped with condensed water recovery devices have been developed in this field in recent years, because they cannot be completely isolated from the atmosphere, oxygen corrosion still exists in the system, and condensed water cannot be fully recovered, resulting in system heat loss. waste and corrosion of equipment. In addition, most of the heat-using equipment in the current system must be equipped with steam traps, becau...

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Problems solved by technology

[0002] At present, most of the known industrial boiler phase change heating systems are open systems, and the steam turns into condensed water after heat exchange in the system, and most of the condensed water and the secondary steam after depressurization cannot be effectively recovered by the system use

Although some heating systems equipped with condensed water recovery devices have been developed in this field in recent years, because they cannot be completely isolated from the atmosphere, oxygen corrosion still exists in the system, and condensed water cannot be fully recovered, resulting in system heat loss. waste and corrosion of equipment

In addition, most of the heat-consuming equipment in the current system must be equipped with steam traps, because the failure of steam traps is common during the operation of the system, which affects the normal operation of the equipment. When the temperature and pressure drop, a negative pressure is generated, and the external air invades the internal corrosion system and equipment of the system through the gaps in the pipes and pump rafts, which also affects heat transfer. Therefore, the current system must also be equipped with deaerators and sodium ion exchangers. processing equipment

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