Steam-water separation type desuperheater

Abstract

The utility model relates to a desuperheater, and aims to provide a steam-water separation type desuperheater which can effectively improve the dryness of steam so as to enlarge the application range of the steam. The technical scheme is a steam-water separation type desuperheater. The steam-water separation device is characterized in that a steam-water separation assembly is installed between a nozzle in an inner cavity of the steam pipeline and an outlet of the steam pipeline, and a drainage assembly is installed between the nozzle and the steam-water separation assembly; the steam-water separation assembly comprises a steam-water separation upper plate and a steam-water separation lower plate which are vertically arranged and are spaced from each other by a certain distance; the steam-water separation upper plate is in the shape of a lacked circle larger than a half circle, and a notch of the lacked circle is located on the lower side of the lacked circle so as to facilitate flowing of attemperation water; the steam-water separation lower plate is in the shape of a lacked circle larger than a half circle, and a notch of the lacked circle is located on the upper side of the lacked circle so as to facilitate separation of steam from the attemperation water; and the steam-water separation lower plate is positioned between the steam-water separation upper plate and the outlet of the steam pipeline.

Description

Technical Field

[0001] The utility model relates to a desuperheater, in particular to a steam-water separation type desuperheater. Background Art

[0002] CN105526579 A discloses a Venturi desuperheater, aiming to provide a desuperheater with more stable steam flow rate, more obvious desuperheating effect and higher efficiency. The key points of its technical solution are that a Venturi tube is arranged in a mixing pipe, and evenly distributed semicircular through holes are arranged at the end with a larger diameter of the Venturi tube, and two symmetrical through holes are arranged at the intersection of the curved section and the straight section of the Venturi tube. A water spray pipe passes through the through hole, one end of which is fixed on the outer wall of the mixing pipe, and the other end is fixed on the outer wall of the Venturi tube. Two rows of nozzles arranged at equal intervals with an angle of 40° are arranged on the section of the water spray pipe located in the Venturi tube.

[0003] The steam provided by this desuperheater has high humidity and cannot be directly applied in many working conditions, especially those that require steam dryness. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the above-mentioned background technology and provide a steam-water separation type desuperheater, which can effectively improve the dryness of steam, thereby expanding the use range of steam.

[0005] The technical solution provided by the utility model is:

[0006] A steam-water separation type desuperheater comprises a horizontally arranged steam pipe, a venturi tube installed in the inner cavity of the steam pipe, and a nozzle radially extending into the steam pipe to spray desuperheating water into the steam pipe;

[0007] The invention is characterized in that: a steam-water separation component is installed between the nozzle in the inner cavity of the steam pipe and the outlet of the steam pipe, and a hydrophobic component is installed between the nozzle and the steam-water separation component; the steam-water separation component comprises a steam-water separation upper plate and a steam-water separation lower plate which are arranged vertically and spaced a certain distance from each other; the shape of the steam-water separation upper plate is a lack of circle larger than half a circle and the notch of the lack of circle is located at the lower side of the lack of circle to facilitate the flow of cooling water, and the shape of the steam-water separation lower plate is a lack of circle larger than half a circle and the notch of the lack of circle is located at the upper side of the lack of circle to facilitate the separation of steam from cooling water; the steam-water separation lower plate is located between the steam-water separation upper plate and the outlet of the steam pipe.

[0008] The drain assembly comprises a drain port made on the inner wall of the bottom of the steam pipe and a drain valve group located outside the steam pipe and sealed and connected to the drain port.

[0009] The certain distance is 100-300 mm.

[0010] The venturi tube is installed in close contact with the inner diameter of the steam pipe, and the nozzle of the nozzle passes through the pipe wall of the steam pipe and the pipe wall of the venturi tube in sequence from the outside of the steam pipe and then extends into the inner cavity of the venturi tube.

[0011] The beneficial effects of the utility model are:

[0012] Since the steam-water separation component and the hydrophobic component are added to the conventional venturi tube desuperheater, the dryness of the steam after desuperheating treatment of the utility model is significantly increased, thereby expanding the application range of the steam; the utility model also has the characteristics of simple structure and convenient production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0014] Numbers in the figure: nozzle 1, venturi tube 2, steam pipe 3, steam separation upper plate 4, steam separation lower plate 5, drain port 6, drain valve group 7, stop valve 8, drain valve 9. DETAILED DESCRIPTION

[0015] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0016] The steam-water separation desuperheater shown in the attached drawing comprises a horizontally arranged steam pipe 3, a venturi tube 2 installed in the inner cavity of the steam pipe, and a nozzle 1 radially extending into the steam pipe to spray desuperheating water into the steam pipe; the above structure is similar to the existing desuperheater.

[0017] The improvement of the utility model is:

[0018] A steam-water separation component and a hydrophobic component are installed in the inner cavity of the steam pipe; specifically, the steam-water separation component is installed between the nozzle and the steam pipe outlet (the right end of the steam pipe in the figure), and the hydrophobic component is installed between the nozzle and the steam-water separation component. The steam-water separation component includes an upper steam-water separation plate and a lower steam-water separation plate, and the upper steam-water separation plate and the lower steam-water separation plate are arranged in sequence according to the steam flow direction; the upper steam-water separation plate and the lower steam-water separation plate are arranged vertically and spaced a certain distance from each other to serve as a channel for steam flow; the shape of the upper steam-water separation plate is a circle greater than half a circle and the notch of the circle is located on the lower side of the circle to facilitate the flow of cooling water; the shape of the lower steam-water separation plate is a circle greater than half a circle and the notch of the circle is located on the upper side of the circle to facilitate the separation of steam and cooling water. The arc edge of the lower steam-water separation plate and the arc edge of the upper steam-water separation plate are both sealed and connected to the inner wall of the steam pipe (preferably welded).

[0019] The drain assembly includes a drain port 6 made on the inner wall of the bottom of the steam pipe and a drain valve group 7 located outside the steam pipe and sealed and connected to the drain port. The drain valve group includes a drain valve 9 and three stop valves 8, wherein a stop valve is connected in series before and after the drain valve to form a branch, and another branch (bypass) is connected in series with only one stop valve; the two branches are connected in parallel to the drain port.

[0020] The certain distance is 100-300mm, which can be selected according to the specific needs.

[0021] The outer circumference of the venturi tube is installed in close contact with the inner diameter of the steam pipe, and the nozzle of the nozzle passes through the steam pipe wall and the venturi tube wall in sequence from the outside of the steam pipe and then extends into the inner cavity of the venturi tube.

[0022] The working principle of the utility model is:

[0023] The mist cooling water sprayed from the nozzle mixes with the steam in the steam pipe and flows toward the outlet of the steam pipe. During the flow, some of the mist cooling water touches each other to form larger water droplets, and falls to the bottom under the action of gravity to form accumulated water, which is then discharged through the steam trap group. The steam with less water content separates from the accumulated water and climbs upward because its specific gravity is less than that of water, and is then output toward the outlet of the steam pipe, thereby obtaining relatively dry steam.

Claims

1. A steam-water separation type desuperheater, comprising a horizontally arranged steam pipe (3), a venturi tube (2) installed in the inner cavity of the steam pipe, and a nozzle (1) radially extending into the steam pipe to spray desuperheating water into the steam pipe; Features: A steam-water separation component is installed between the nozzle in the inner cavity of the steam pipe and the outlet of the steam pipe, and a hydrophobic component is installed between the nozzle and the steam-water separation component; the steam-water separation component comprises a steam-water separation upper plate (4) and a steam-water separation lower plate (5) which are arranged vertically and spaced a certain distance from each other; the shape of the steam-water separation upper plate is a circle greater than half a circle and the notch of the circle is located at the lower side of the circle to facilitate the flow of cooling water, and the shape of the steam-water separation lower plate is a circle greater than half a circle and the notch of the circle is located at the upper side of the circle to facilitate separation from cooling water; the steam-water separation lower plate is located between the steam-water separation upper plate and the outlet of the steam pipe.

2. The steam-water separation desuperheater according to claim 1, characterized in that: The drain assembly comprises a drain port (6) formed on the inner wall of the bottom of the steam pipe and a drain valve group (7) located outside the steam pipe and sealed and connected to the drain port.

3. The steam-water separation desuperheater according to claim 2, characterized in that: The certain distance is 100-300 mm.

4. The steam-water separation desuperheater according to claim 3, characterized in that: The venturi tube is installed in close contact with the inner diameter of the steam pipe, and the nozzle of the nozzle passes through the pipe wall of the steam pipe and the pipe wall of the venturi tube in sequence from the outside of the steam pipe and then extends into the inner cavity of the venturi tube.

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