A fixed row expander

Abstract

The invention discloses a constant-discharge-capacity flash tank. The constant-discharge-capacity flash tank comprises a rack and a housing fixedly mounted above the rack, wherein a gas exhaust hole and a liquid exhaust hole are separately formed in the upper end and the lower end of the housing; heat exchange tubes are arranged in the housing; one end of each heat exchange tube is equipped with a desalted water source; the lower end of the housing is equipped with a wastewater inlet tube which is arranged in the housing in a penetrating mode; one end of the wastewater inlet tube is connected with a booster pump for increasing water pressure; a spraying net tube which is distributed in the shape of net is arranged above the wastewater inlet tube; the upper end of the wastewater inlet tube is arranged in an expanded mode, and communicates with the lower end surface of the spraying net tube; a spraying hole is formed in the upper end surface of the spraying net tube; each heat exchange tube comprises an inlet tube which penetrates through the housing, an outlet tube which penetrates through the housing and a plurality of heat exchange units positioned in the housing; a water pump is arranged on each inlet tube; the heat exchange units communicate with one another; and the heat exchange units at upper and lower ends separately communicate with one of the inlet tubes and the outlet tubes. Wastewater is in contact with all heat exchange tubes in an upward spraying process and a dropping process, so that heat exchange time is prolonged, and heat energy is sufficiently recycled.

Description

technical field [0001] The invention relates to a steam-water system for a boiler, in particular to a fixed row expansion vessel. Background technique [0002] The continuous row and fixed discharge wastewater of the boiler contains a large amount of calorific value. It was originally discharged into the atmosphere and the ditch after the expansion and pressure reduction of the expansion vessel. This not only causes heat pollution, water pollution, but also wastes energy. Therefore, there are now some expansion vessels that can recover waste heat. By installing coils in the expansion vessel and passing desalted water through them, the desalinated water can be heated to recover waste heat. [0003] For example, the patent with the announcement number of 106765033A discloses a heat recovery device for boiler blowdown, including a fixed-row expansion vessel, a sewage main pipe is arranged on the lower side of the fixed-row expansion vessel, and a heat exchanger is arranged on t...

AI Technical Summary

Problems solved by technology

[0002] The continuous row and fixed discharge wastewater of the boiler contains a large amount of calorific value. It was originally discharged into the atmosphere and the ditch after expanding the capacity and reducing the pressure. This not only causes heat pollution, water pollution, but also wastes energy.

Images