Multi-path steam mixing desuperheater

Abstract

The utility model relates to a steam desuperheater, and aims to provide a multi-path steam mixing desuperheater which can realize effective multi-path steam mixing desuperheater and has the characteristics of good desuperheater effect, simple structure and low cost. According to the technical scheme, the multi-path steam mixing desuperheater comprises a steam pipeline, a Venturi tube installed in an inner cavity of the steam pipeline and a nozzle installed in the Venturi tube. The device is characterized in that the inlet end of the steam pipeline is provided with a plurality of steam inlets and a wave-shaped steam mixing channel arranged between the inlet end and the Venturi tube; the wave-shaped steam mixing channel is formed by a plurality of mixing plates which are arranged on the upper side and the lower side of the inner wall of the steam pipeline at certain intervals.

Description

Technical Field

[0001] The utility model relates to a steam temperature reducing device, in particular to a multi-channel steam mixing temperature reducing device. Background Art

[0002] CN 213955288 U discloses a steam desuperheater, comprising a steam pipe, a water injection pipe, a swirl pipe, a venturi pipe and a mixing pipe; the steam pipe is arranged horizontally, the venturi pipe is arranged concentrically in the steam pipe, a swirl chamber is formed inside the middle of the venturi pipe, the swirl pipe is arranged concentrically in the swirl chamber, a plurality of vertical swirl holes tangent to the inner wall of the swirl pipe are opened on one side of the swirl pipe, the water injection pipe is vertically plugged into the steam pipe, the mixing pipe is arranged concentrically inside the steam pipe and on the right side of the venturi pipe. The steam desuperheater can prolong the mixing time of the desuperheating water and the steam, so that the desuperheating water is completely atomized.

[0003] The disadvantage of this desuperheater and pressure reducer is that it can only be used to reduce the temperature of single-channel steam. When multiple channels of steam need to be cooled to the same parameter, multiple desuperheaters can only be added to perform one-to-one cooling. This increases the investment cost, the subsequent maintenance workload, and significantly increases the on-site installation space. 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 multi-channel steam mixing desuperheater, which can realize effective multi-channel steam mixing desuperheating and has the characteristics of good desuperheating effect, simple structure and low cost.

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

[0006] A multi-channel steam mixing desuperheater comprises a steam pipe, a venturi tube installed in the inner cavity of the steam pipe and a nozzle installed in the venturi tube; the characteristics are: the inlet end of the steam pipe is provided with a plurality of steam inlets and a wavy steam mixing channel installed between the inlet end and the venturi tube; the wavy steam mixing channel is formed by a plurality of mixing plates which are arranged at intervals on the upper and lower sides of the inner wall of the steam pipe and are spaced a certain distance apart.

[0007] The plurality of mixing plates include an upper mixing plate closing the upper half of the steam pipe and a lower mixing plate closing the lower half of the steam pipe. The upper mixing plate and the lower mixing plate are arranged vertically and their circumferential edges are sealed to the inner wall of the steam pipe.

[0008] The upper mixing plate and the lower mixing plate are both adapted to the inner diameter of the steam pipe, and are both in the shape of a circular segment larger than half a circle.

[0009] The steam inlet is formed by a steam input pipe connected to a steam pipeline.

[0010] The certain distance is 100-300 mm.

[0011] The beneficial effects of the utility model are as follows: the multi-channel steam mixing desuperheater provided by the utility model can guide multiple steam streams together, and then fully mix them through the wave-shaped steam mixing channel, and then reduce the temperature through the Venturi tube, thereby improving the steam cooling effect; and the utility model has a simple structure, is easy to manufacture, is not costly, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0013] Reference numerals in the figure: steam input pipe 1, steam pipe 2, upper mixing plate 3, lower mixing plate 4, venturi tube 5, nozzle 6. DETAILED DESCRIPTION

[0014] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0015] The multi-channel steam mixing desuperheater shown in the accompanying drawings comprises a steam pipe 2, a venturi tube 5 installed in the inner cavity of the steam pipe, and a nozzle 6 installed in the venturi tube; this structure is similar to the existing desuperheating device.

[0016] The improvement of the utility model is that: the inlet end of the steam pipe is provided with a plurality of steam inlets and a wavy steam mixing channel installed between the inlet end and the venturi tube; the steam inlet is formed by a steam input pipe 1 connected to the steam pipe, and the plurality of steam inlets can input a plurality of steam paths with different parameters (such as steam pressure, steam temperature). The wavy steam mixing channel is formed by a plurality of mixing plates vertically fixed on the inner wall of the steam pipe, and these mixing plates include an upper mixing plate 3 and a lower mixing plate 4, and the upper mixing plate and the lower mixing plate are arranged at intervals on the upper and lower sides of the inner wall of the steam pipe and are spaced a certain distance apart. It can be seen from the figure that the upper mixing plate and the lower mixing plate are both suitable for the inner diameter of the steam pipe, and both are in the shape of a circle greater than half a circle.

[0017] The upper mixing plate closes the upper half of the steam pipe, and its notch is located at the lower part of the steam pipe for circulating steam; the lower mixing plate closes the lower half of the mixed steam pipe, and its notch is located at the upper part of the steam pipe for circulating steam; the circumferential edges of the upper mixing plate and the lower mixing plate are both sealed and connected to the inner wall of the mixed steam pipe.

[0018] The certain distance is 100-300 mm.

[0019] The working principle of the utility model is: multiple steam streams are respectively input into the steam pipeline through the steam inlet of each steam input pipe, then fully mixed and adjusted to the same parameters through the wave-shaped steam mixing channel, then cooled through the venturi tube, and finally output from the steam outlet. The whole device has a simple structure, is easy to make, has low cost, and is highly practical.

Claims

1. A multi-channel steam mixing desuperheater, comprising a steam pipeline (2), a venturi tube (5) installed in the inner cavity of the steam pipeline, and a nozzle (6) installed in the venturi tube; characterized in that: The inlet end of the steam pipe is provided with a plurality of steam inlets and a wavy steam mixing channel installed between the inlet end and the venturi tube; the wavy steam mixing channel is formed by a plurality of mixing plates arranged at intervals on the upper and lower sides of the inner wall of the steam pipe and at a certain interval.

2. The multi-channel steam mixing desuperheater according to claim 1, characterized in that: The plurality of mixing plates include an upper mixing plate (3) enclosing the upper half of the steam pipe and a lower mixing plate (4) enclosing the lower half of the steam pipe. The upper mixing plate and the lower mixing plate are both arranged vertically and their circumferential edges are sealed to the inner wall of the steam pipe.

3. The multi-channel steam mixing desuperheater according to claim 2, characterized in that: The upper mixing plate and the lower mixing plate are both adapted to the inner diameter of the steam pipe, and are both in the shape of a circular segment larger than half a circle.

4. The multi-channel steam mixing desuperheater according to claim 3, characterized in that: The steam inlet is formed by a steam input pipe (1) connected to a steam pipeline.

5. The multi-channel steam mixing desuperheater according to claim 4, characterized in that: The certain distance is 100-300 mm.

Images