Two-stage steam desuperheater capable of absorbing accumulated water

Abstract

The utility model relates to a steam desuperheater, and aims to provide a two-stage steam desuperheater capable of digesting accumulated water, and the desuperheater can effectively digest the accumulated water, so that resources are fully utilized, and the operation cost is reduced. According to the technical scheme, the two-stage steam desuperheater capable of absorbing accumulated water is characterized in that a second Venturi tube and a second nozzle mounted in the second Venturi tube are further mounted in an inner cavity of a steam pipeline; the steam pipeline is bent into a transversely arranged U shape, and two straight pipes of the U-shaped steam pipeline are arranged up and down; the first venturi tube and the second venturi tube are respectively arranged in the two straight tubes; an accumulated water outlet pipe is further mounted on the pipe wall between the first Venturi pipe and the outlet of the steam pipeline, and the outlet end of the accumulated water outlet pipe is communicated with the second nozzle, so that the drained accumulated water is output through the second nozzle.

Description

Technical Field

[0001] The utility model relates to a steam temperature reducing device, in particular to a two-stage steam temperature reducing device capable of absorbing accumulated water. 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 temperature and pressure reducer is that it is easy to generate water accumulation, and the generated accumulated water can only be discharged through the steam trap, resulting in a waste of resources and an increase in operating costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the shortcomings of the above-mentioned background technology and provide a two-stage steam desuperheater capable of absorbing accumulated water. The desuperheater should be able to effectively digest the accumulated water to fully utilize resources and reduce operating costs.

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

[0006] A two-stage steam desuperheater capable of absorbing accumulated water comprises a steam pipe, a first venturi tube installed in the inner cavity of the steam pipe, and a first nozzle installed in the first venturi tube; the characteristics are as follows: a second venturi tube and a second nozzle installed in the second venturi tube are also installed in the inner cavity of the steam pipe; the steam pipe is bent into a laterally arranged U-shape, and two straight tubes of the U-shaped steam pipe are arranged up and down; the first venturi tube and the second venturi tube are respectively installed in the two straight tubes; a water outlet pipe is also installed on the pipe wall between the first venturi tube and the steam pipe outlet, and the outlet end of the water outlet pipe is connected to the second nozzle, so that the drawn accumulated water is output through the second nozzle.

[0007] A check valve is installed in the accumulated water outlet pipe to prevent steam from circulating in the accumulated water outlet pipe.

[0008] A water outlet hole is also provided on the pipe wall between the first venturi pipe and the steam pipe outlet. The water outlet hole is located at the lower side of the pipe wall and is connected to an external water outlet pipe.

[0009] The beneficial effects of the utility model are as follows: the two-stage steam desuperheater provided by the utility model that can absorb accumulated water can reuse the accumulated water generated during the desuperheating process, thereby fully and effectively utilizing resources and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0011] Numbers in the figure: steam pipe 1, first venturi tube 2, first nozzle 3, threaded assembly 3-1, nozzle seat 3-2, accumulated water outlet pipe 4, check valve 5, second venturi tube 6, second nozzle 7. DETAILED DESCRIPTION

[0012] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0013] The two-stage steam desuperheater capable of absorbing accumulated water shown in the attached figure comprises a steam pipe 1, a first venturi tube 2 installed in the inner cavity of the steam pipe, and a first nozzle 3 installed in the first venturi tube; the first nozzle is installed on a nozzle seat 3-2; the nozzle seat is a hollow rod with one end closed and radially extending into the inner cavity of the steam pipe; the other end of the nozzle seat (the end equipped with a desuperheating water inlet) passes through the steam pipe wall and the first venturi pipe wall in sequence, and is then fixed to the steam pipe wall through a threaded component 3-1 (the threaded component is welded on the outer wall of the steam pipe); at the same time, the water pipe providing desuperheating water is also connected to the desuperheating water inlet through the threaded component. Obviously, this structure is similar to the existing desuperheating device.

[0014] The improvements of the utility model are:

[0015] A second venturi tube 6 is also installed in the inner cavity of the steam pipe, and a second nozzle 7 is installed in the second venturi tube; the steam pipe is bent into a U-shape, and the two straight tubes of the U-shaped steam pipe are arranged up and down and both are arranged horizontally; the first venturi tube is installed in the straight tube located on the upper side of the U-shaped tube, and the second venturi tube is installed in the straight tube located on the lower side of the U-shaped tube; the installation structure of the second venturi tube is the same as that of the first venturi tube, and the installation structure of the second nozzle is the same as that of the first nozzle.

[0016] A water outlet hole is also provided on the tube wall between the first venturi tube and the steam pipe outlet. The water outlet hole is located on the lower side of the tube wall and is connected to an external water outlet pipe 4. The outlet end of the water outlet pipe is connected to the second nozzle (as can be seen from the figure: the outlet end of the water outlet pipe is connected to the nozzle seat of the second nozzle) so that the drawn-out accumulated water can be used as a water source for the second nozzle.

[0017] A check valve 5 is also installed in the accumulated water outlet pipe to prevent steam from circulating in the accumulated water outlet pipe.

[0018] The working principle of the utility model is as follows: the steam entering the steam pipe is sprayed into the first venturi tube through the first nozzle and then output from the steam pipe outlet; when water accumulates between the first venturi tube and the steam pipe outlet, the accumulated water will flow to the second nozzle through the accumulated water outlet pipe under the action of gravity, and then sprayed into the second venturi tube to cool the steam. When there is no accumulated water, the check valve in the accumulated water outlet pipe is closed to prevent the steam in the second venturi tube from flowing into the accumulated water outlet pipe.

Claims

1. A two-stage steam desuperheater capable of absorbing accumulated water, comprising a steam pipe (1), a first venturi tube (2) installed in the inner cavity of the steam pipe, and a first nozzle (3) installed in the first venturi tube; characterized in that: A second venturi tube (6) and a second nozzle (7) installed in the second venturi tube are also installed in the inner cavity of the steam pipe; the steam pipe is bent into a U-shape arranged horizontally, and the two straight tubes of the U-shaped steam pipe are arranged up and down; the first venturi tube and the second venturi tube are respectively installed in the two straight tubes; a water discharge pipe (4) is also installed on the pipe wall between the first venturi tube and the steam pipe outlet, and the outlet end of the water discharge pipe is connected to the second nozzle, so that the discharged accumulated water is output through the second nozzle.

2. The two-stage steam desuperheater capable of absorbing accumulated water according to claim 1, characterized in that: A check valve (5) is installed in the accumulated water outlet pipe to prevent steam from flowing in the accumulated water outlet pipe.

3. The two-stage steam desuperheater capable of absorbing accumulated water according to claim 2, characterized in that: A water outlet hole is also provided on the pipe wall between the first venturi pipe and the steam pipe outlet. The water outlet hole is located at the lower side of the pipe wall and is connected to an external water outlet pipe.

Images