CN201074612Y - Vortex flow type efflux pump - Google Patents

Abstract

The utility model discloses a swirling type jet pump, which comprises an air intake tube, a throat pipe inlet, a throat pipe, a nozzle, a diffusion tube and a tail pipe, wherein the air intake tube is located on the side wall of the throat pipe inlet, the nozzle is located in the throat pipe inlet, the throat pipe inlet is communicated with the throat pipe, and the diffusion tube which is under the throat pipe is communicated with the tail pipe. The utility model is characterized in that a swirler is installed in the tail pipe, the swirler is composed of a central column and at least three pieces of vanes which are fixed on the side wall of the central column, wherein the vanes are distributed evenly between the central column and the inner wall of the tail pipe according to the circumference. The utility model can intensify gas-liquid disturbing intensity on a jet pump outlet and mixing level between mediums, sufficient mixing and even distribution of liquid can be promoted, medium utilizing efficiency can be increased, and operating energy consumption can be lowered.

Description

Vortex jet pump

technical field

The utility model belongs to the technical field of jet pumps, in particular to a swirling jet pump.

Background technique

There are two forms of forced oxidation and natural oxidation in the limestone wet flue gas desulfurization process. In the natural oxidation process, problems such as scaling and blockage often occur, which affect the normal operation of the entire system. Therefore, the current international wet desulfurization process mainly uses forced oxidation. Mainly oxidation.

Most of the forced oxidation systems rely on fans or air compressors as the power source of forced oxidation air, blowing air into the limestone slurry. The forced oxidation system is relatively stable and has wide adaptability, but it has disadvantages such as complex equipment, large structure volume, large land occupation, low oxygen utilization rate, high operating cost, large infrastructure investment, high noise, and difficult maintenance and management. In order to overcome the above shortcomings, limestone slurry jet oxidation process is adopted in some foreign projects. This process uses limestone slurry as the working fluid, entrains air and slurry into the slurry pool through the jet pump, and in the case of sufficient oxygen supply in the slurry pool , The oxidation fan can be stopped, thus reducing the operating cost and saving energy by about 20%.

However, the conventional jet pump currently used includes a nozzle, a throat inlet, a throat pipe, a diffuser pipe, a tailpipe, and an air suction pipe swirl type jet pump, wherein the air suction pipe is located at the side wall of the throat inlet and communicates with it. , the nozzle is located at the upper end of the throat inlet and extends into the throat inlet, the lower end of the throat inlet communicates with the upper end of the throat, the lower end of the throat is a diffuser, and the diffuser is connected to the tailpipe connected, and the centerlines of the nozzle, throat inlet, throat, diffuser and tailpipe coincide. When conventional jet pumps spray gas and liquid mixtures, it is difficult to achieve sufficient mixing between gas and liquid, and the mass transfer efficiency is not good. High, the medium utilization rate is reduced, and the operating energy consumption is increased.

The disadvantages of the existing jet pump are: it does not have the stirring function, the mixing degree of the medium in the jet pump and near the outlet is low, and the operation energy consumption is high.

Utility model content

The technical problem to be solved by the utility model is to provide a swirling jet pump, which has a stirring function and can enhance the gas-liquid disturbance intensity at the outlet of the jet pump and the mixing degree between the media.

The technical scheme of the utility model is as follows: a swirling jet pump, comprising an air suction pipe, a throat inlet, a throat, a nozzle, a diffuser pipe and a tailpipe, wherein the air suction pipe is located on the side wall of the throat inlet and In communication with it, the nozzle is located at the upper end of the throat inlet and extends into the throat inlet, the lower end of the throat inlet communicates with the upper end of the throat, and the lower end of the throat is a diffusion pipe, which is connected to the The tailpipe is connected, and the center lines of the nozzle, throat inlet, throat, diffuser and tailpipe are coincident. The key point is that a swirler is installed in the tailpipe, and the swirler is composed of a central column and a fixed The side wall is composed of at least 3 blades, wherein the blades are evenly distributed on the circumference between the central column and the inner wall of the tail pipe, and the blades are fixedly connected with the tail pipe.

The pressurized slurry is ejected from the nozzle at a high speed, and a momentary negative pressure is formed at the entrance of the throat, entraining the air in the suction pipe and entering the throat together, and the gas-liquid mixture is ejected through the swirler to provide oxidizing air.

The cross-section of the center column accounts for 8-12% of the cross-sectional area of the tailpipe.

The central column is a steel pipe, the blade is made of a steel plate, and the two sides of the steel plate are respectively welded on the central column and the tail pipe.

The blade is a steel plate bent in the middle, the straight blade is above the bend, and the oblique blade is below the bend.

所述斜叶片与尾管出口水平夹角α为25°～35°。The height of the swirler is h, the straight blades are parallel to the center line of the tailpipe, and the bending radius r of the blades is

The horizontal angle α between the inclined blade and the outlet of the tail pipe is 25°-35°.

When the gas-liquid mixed liquid flow passes through the swirler, a rotating jet is generated, and a recirculation zone is generated near the outlet of the swirler, which increases the degree of slurry disturbance, strengthens the mixing of air and slurry, and then promotes the uniform distribution of air in the slurry pool and Oxygen uptake. At the same time, the swirling liquid can be stirred to a certain extent.

Beneficial effects: the utility model has a stirring function, which can enhance the gas-liquid disturbance intensity at the outlet of the jet pump and the mixing degree between the medium, promote the full mixing and uniform distribution of the fluid, improve the utilization efficiency of the medium, and reduce the operating energy consumption.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a cross-sectional view of a swirler;

Fig. 3 is the structural representation of blade;

Fig. 4 is the structural representation that the utility model extends into the limestone slurry pool;

Fig. 5 is a three-dimensional structure diagram of a swirler.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Take limestone slurry liquid jet oxidation technology in limestone wet flue gas desulfurization process as an example:

As shown in Figures 1 and 2, a swirling jet pump consists of an air suction pipe 1, a throat inlet 2, a throat pipe 3, a nozzle 4, a diffuser pipe 5, a tail pipe 6, a swirl device 7, blades 8 and The central column 9 is formed, wherein the air suction pipe 1 is located at the side wall of the throat inlet 2 and communicates with it, the nozzle 4 is located at the upper end of the throat inlet 2 and extends into the throat inlet 2, and the throat inlet 2 The lower end communicates with the upper end of the throat pipe 3, the lower end of the throat pipe 3 is a diffuser pipe 5, and the diffuser pipe 5 communicates with the tail pipe 6, and the nozzle 4, the throat pipe inlet 2, the throat pipe 3, The centerlines of the diffuser pipe 5 and the tail pipe 6 coincide, and the tail pipe 6 is provided with a swirler 7, which consists of a central column 9 and 6 to 10 blades 8 fixed on its side walls, wherein The blades 8 are evenly distributed on the circumference between the central column 9 and the inner wall of the tail pipe 6 , and the blades 8 are fixedly connected to the tail pipe 6 .

The pressurized slurry is ejected from the nozzle 4 at a high speed, and the mouth of the throat inlet 2 forms a momentary negative pressure, entraining the air in the suction pipe 1 and entering the throat 3 together, and the gas-liquid mixture is ejected through the swirl 7, so that This provides oxidizing air.

The cross-section of the central column 9 accounts for 8-12% of the cross-sectional area of the tail pipe.

The central column 9 is a steel pipe, the blade 8 is made of a steel plate, and the two sides of the steel plate are respectively welded on the central column 9 and the tailpipe 6 .

As shown in Figures 3 and 5, the blade 8 is a steel plate bent in the middle, the straight blade 8a is above the bend, and the oblique blade 8b is below the bend.

所述斜叶片8b与尾管6出口水平夹角α为30°。The height of the swirler is h, the straight blade 8a is parallel to the centerline of the tail pipe 6, and the bending radius r of the blade 8 is

The horizontal angle α between the inclined blade 8b and the outlet of the tail pipe 6 is 30°.

The height h of the swirler is 200-300mm, the thickness of the blade 8 is 2mm, and the length of the upright plate 8a is 15-20mm.

It works as follows:

As shown in Figure 4, the pressurized limestone slurry is ejected from the nozzle 4 at a high speed, and a negative pressure is formed at the inlet 2 of the throat pipe, entraining the air in the suction pipe 1 and entering the throat pipe 3 together, and the gas-liquid mixture is swirled The device 7 enters the limestone slurry pool to provide oxidizing air. The gas-liquid mixed liquid flow passes through the swirler to generate a rotating jet, which is sprayed into the slurry pool, and a recirculation zone is generated near the outlet of the swirler, which increases the degree of slurry disturbance, strengthens the mixing of air and limestone slurry, and then promotes air in the slurry tank. Uniform distribution and oxygen absorption in the slurry pool. At the same time, the swirling liquid can stir to a certain extent, improving the quality of gypsum.

Claims (5)

1. cyclone type Jet injector, comprise air intake pipe (1), trunnion inlet (2), trunnion (3), nozzle (4), diffusing tube (5) and tail pipe (6), wherein said air intake pipe (1) is positioned at the sidewall of trunnion inlet (2) and communicates with it, described nozzle (4) is positioned at the upper end of trunnion inlet (2) and stretches into trunnion inlet (2), the lower end of trunnion inlet (2) is communicated with the upper end of described trunnion (3), the lower end of described trunnion (3) is diffusing tube (5), this diffusing tube (5) communicates with described tail pipe (6), and described nozzle (4), trunnion inlet (2), trunnion (3), the central lines of diffusing tube (5) and tail pipe (6), it is characterized in that: swirler (7) is installed in the described tail pipe (6), this swirler (7) is made up of newel (9) and 3 blades (8) of being fixed on its sidewall at least, wherein blade (8) is evenly distributed between newel (9) and described tail pipe (6) inwall by circumference, and blade (8) is fixedlyed connected with tail pipe (6).

2. according to the described cyclone type Jet injector of claim 1, it is characterized in that: described newel (9) cross section accounts for the 8-12% of tail pipe cross sectional area.

3. according to claim 1 or 2 described cyclone type Jet injectors, it is characterized in that: described newel (9) is a steel pipe, and described blade (8) is made by steel plate, and two sides of this steel plate are welded on respectively on newel (9) and the described tail pipe (6).

4. according to the described cyclone type Jet injector of claim 3, it is characterized in that: described blade (8) is the steel plate of a middle part bending, and this bending part top is prismatic blade (8a), and this bending part below is oblique blade (8b).

5. according to the described cyclone type Jet injector of claim 4, it is characterized in that: described swirler height is h, and described prismatic blade (8a) is parallel with the center line of tail pipe (6), and the bending radius r of described blade (8) bending part is

Described oblique blade (8b) is 25 °～35 ° with tail pipe (6) outlet horizontal sextant angle α.

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