Condensed water recycling device and method based on low-temperature flue gas of afterheat boiler

Abstract

The invention discloses a condensed water recycling device and method based on low-temperature flue gas of an afterheat boiler. The condensed water recycling device comprises an afterheat boiler (6), a flue pipe (1), a chimney (10), a first water pump (2) and a water supplementing tank (3), and is characterized by also comprising a plate type heat exchanger (3), a steam collection cylinder (4) and a condensed water collection tank (7), wherein the plate type heat exchanger is arranged in a front-end flue positioned between the afterheat boiler (6) and the chimney (10); a soft water outlet of the plate type heat exchanger is connected with a water feeding pipeline of the afterheat boiler; an outlet of the steam pipeline of the heat boiler is connected with the steam collection cylinder (4); and the condensed water collection tank (7) is arranged under a cold water port of the plate type heat exchanger. The plate type heat exchanger is arranged in the flue, and the afterheat of the low-temperature flue gas is fully recycled, so that the water feeding temperature of the boiler is improved, and the fuel utilization efficiency is improved; the flue gas condensed water is recycled and is used as boiler supplementary water, the phenomenon of water deficiency in northwest areas is alleviated; the phenomenon that the flue and the chimney equipment are frozen when the equipment runs in winter is avoided, and the service life is extended.

Description

technical field [0001] The invention belongs to the field of recovery of waste heat boilers, and in particular relates to a condensate recovery device and method based on low-temperature flue gas of waste heat boilers. Background technique [0002] For a long time, the lack of water resources has been the main restrictive factor for the social and economic development in Northwest China, and it is also related to the normal life and social stability of urban residents. The excessive exploitation of surface water and the increasingly serious pollution of river water have exacerbated the water shortage in Northwest China. Severe water shortage is the most prominent problem in Northwest China at present. According to statistics from the water conservancy department, the per capita daily water consumption in Northwest China is only 131L, which is far lower than the 216.9L per capita in cities across the country. During the summer drought, the urban water supply becomes more di...

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Problems solved by technology

[0005] The present invention provides a condensate recovery device and method based on the low-temperature flue gas of the waste heat boiler. and chimney erosion problems

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