Low-pressure and low-noise steam drain water expander

Abstract

The invention discloses a low-pressure and low-noise steam drain water expander. The low-pressure and low-noise steam drain water expander comprises a barrel, wherein a steam exhausting pipe is arranged at the upper part of the barrel and a water discharging pipe is arranged at the bottom of the barrel; a water draining inlet pipe and a temperature reducing water pipe are arranged at the lower part of the barrel; and the temperature reducing water pipe and water spraying pipes are arranged between a steam exhausting opening and a drain water inlet pipe in the barrel. A filter screen is arranged at the inlet of the steam exhausting pipe; the temperature reducing water pipe is arranged along the axial direction of the barrel and is connected with the water spraying pipes; the plurality of layers of water spraying pipes are arranged in a staggered manner; narrow slits are formed in the two sides and the directions of the narrow slits are vertical to the axis of the barrel. According to the low-pressure and low-noise steam drain water expander, temperature reducing water can be in sufficient contact with steam generated by drain water expansion, and the steam temperature is rapidly reduced, so that the steam exhausting volume flow of the expander is reduced, and the working pressure and the steam exhausting noises are relatively low; meanwhile, more steam drained water is recycled. The low-pressure and low-noise steam drain water expander has a simple structure, low machining and manufacturing cost and good energy-saving and noise-reduction effect.

Description

technical field [0001] The invention relates to a steam hydrophobic expansion vessel, in particular to a low-pressure and low-noise steam hydrophobic expansion vessel. technical background [0002] The drain expander is an important device for recovering drain from boilers in thermal power plants. [0003] During the start-up and shutdown of the power station or boiler room, the steam pipes and equipment will generate a large amount of pressure drainage, and a large amount of high-temperature water vapor and drainage will enter the cavity of the expansion vessel, and steam-water separation will occur in the cavity, and the steam will flow from above The steam exhaust port is discharged, and the water is discharged from the lower drain port. In existing projects, the hydrophobic is generally connected to the conventional hydrophobic expander (see attached Figure 5 ) or direct discharge. Direct discharge not only wastes heat and water, but also causes the factory area to be...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high noise, high working pressure, and poor cooling effect of the steam drain expander, the present invention provides a low-pressure and low-noise steam drain expander, which includes a vertical cylinder, and the top of the cylinder is equipped with an exhaust pipe and exhausts steam. The pipe communicates with the inside of the cylinder, the lower part of the cylinder is provided with a drain pipe, and the bottom of the cylinder is provided with a drain pipe, which is characterized in that: one or more desuperheating water pipes are arranged in the cylinder, and the desuperheating water pipes in the cylinder There are multiple or multi-layer water spray pipes from bottom to top, and these water spray pipes are in fluid communication with the desuperheating water pipes

Images