CN212130918U - Steam ejector - Google Patents

Abstract

The utility model discloses a steam ejector, including casing and hybrid tube, the one end of casing is equipped with A fluid entry, the other end with the hybrid tube is connected, the other end of hybrid tube is equipped with the mixed fluid export, be equipped with the fluid nozzle in the casing, fluid nozzle is inside to be formed with first fluid passageway, still install a ring on the inside wall of casing, form annular second fluid passageway between the ring and the lateral wall of fluid nozzle, and the exit end of second fluid passageway is located between the exit end of first fluid passageway and the entrance end of first fluid passageway; and a fluid B inlet is arranged on the side wall of the shell and is positioned between the outlet end of the first fluid channel and the outlet end of the second fluid channel. The utility model provides a steam ejector can effectively improve the mixing ratio of B fluid and A fluid, reduces the injection noise of steam simultaneously.

Description

Steam ejector

Technical Field

The utility model relates to a steam direct heating equipment technical field, more specifically relates to a steam ejector.

Background

In direct contact steam jet heating devices, steam is mixed directly with a liquid or slurry to heat the liquid or slurry. Direct contact steam injection heaters efficiently transfer heat from steam to a liquid or slurry. The steam ejector provides rapid heat transfer with virtually no heat loss and also transfers both latent and available enthalpy of the steam to the liquid or slurry.

A conventional circular steam ejector, which has a large head but a small mixing ratio (amount of sucked water/amount of steam); the mixing ratio of the conical steam ejector is large, but the lift is small; in addition, both the circular steam ejector and the conical steam ejector have a problem of loud noise. How to improve the problem that the mixing ratio of the existing circular steam ejector is small or simultaneously improve the problems that the lift of the existing steam ejector is small, the mixing ratio is small and the noise is large is urgently needed to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a novel steam injector to solve the problems in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a steam ejector comprises a shell and a mixing pipe, wherein one end of the shell is provided with a fluid inlet A, the other end of the shell is connected with the mixing pipe, the other end of the mixing pipe is provided with a mixed fluid outlet, a fluid nozzle is arranged in the shell, a first fluid channel is formed in the fluid nozzle, a circular ring is further installed on the inner side wall of the shell, an annular second fluid channel is formed between the circular ring and the outer side wall of the fluid nozzle, and the outlet end of the second fluid channel is located between the outlet end of the first fluid channel and the inlet end of the first fluid channel; and a fluid B inlet is arranged on the side wall of the shell and is positioned between the outlet end of the first fluid channel and the outlet end of the second fluid channel.

Preferably, the mixing pipe comprises a transition pipe, a first diffusion pipe and a second diffusion pipe which are connected in sequence, the transition pipe is connected with the shell, the second diffusion pipe is provided with a mixed fluid outlet, and the diffusion angle of the second diffusion pipe is larger than that of the first diffusion pipe.

Preferably, the diffusion angle of the first diffusion pipe is not more than 3 degrees.

Preferably, the transition pipe is an inverted conical pipe.

Preferably, the outlet end of the first fluid passage extends into the transition duct.

Preferably, a fluid inlet flange is arranged at the fluid inlet A, a fluid inlet connecting pipe B and a fluid inlet flange B are arranged at the fluid inlet B, and a mixed fluid outlet flange is arranged at the mixed fluid outlet.

Preferably, centers of the housing, the ring, the fluid nozzle, the transition pipe, the first diffuser pipe and the second diffuser pipe are located on the same axis.

Preferably, the ring near the fluid inlet A is formed with an internal conical surface.

The beneficial effects of the utility model reside in that:

in the steam ejector, a first fluid channel formed by a fluid nozzle and an annular second fluid channel formed between a circular ring and the outer side wall of the fluid nozzle are arranged at the same time, the gap of the second fluid channel is small, fluid A, namely steam, is ejected forwards at high speed through the second fluid channel to drive fluid B, namely water flow, to move forwards, the water flow continues to flow forwards at high speed into a mixing pipe under the action of the steam ejected forwards at high speed in the first fluid channel, then is ejected from a mixed fluid outlet under the action of the mixing pipe, and the steam is ejected for 2 times, so that the sucked water flow can be accelerated for the second time, the flow speed of the water flow is increased, more water flows are brought into the mixing pipe, and the mixing ratio is improved;

the transition pipe, the first diffusion pipe and the second diffusion pipe are sequentially connected behind the shell, steam and water flow are further mixed in the transition pipe, and then speed reduction and pressurization are realized under the action of the first diffusion pipe and the second diffusion pipe, so that the lift of the mixed fluid is increased;

in addition, the steam that rivers passed through the second fluid passage and jetted out carries out primary heating, and then the steam that the injection of first fluid passage was handled carries out the secondary heating, can be favorable to eliminating the noise, and because of the higher water temperature, the noise is littleer.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals:

1. a housing; 2. a fluid inlet; 3. a mixed fluid outlet; 4. a fluid nozzle; 5. a first fluid channel; 6. a circular ring; 7. a second fluid passage; 8. a fluid inlet B; 9. a transition duct; 10. a first diffusion tube; 11. a second diffusion tube; 12. a fluid inlet flange; 13. b, a fluid inlet connecting pipe; 14. b a fluid inlet flange; 15. a mixed fluid outlet flange; 16. an inner conical surface.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, a steam ejector includes a casing 1 and a mixing pipe, one end of the casing 1 is provided with a fluid inlet 2 a, the other end of the casing is connected to the mixing pipe, the other end of the mixing pipe is provided with a mixed fluid outlet 3, a fluid nozzle 4 is arranged in the casing 1, a first fluid channel 5 is formed inside the fluid nozzle 4, a circular ring 6 is further installed on the inner side wall of the casing 1, and an annular second fluid channel 7 is formed between the circular ring 6 and the outer side wall of the fluid nozzle 4; and the outlet end of the second fluid channel 7 is located between the outlet end of the first fluid channel 5 and the inlet end of the first fluid channel 5; a fluid inlet B8 is arranged on the side wall of the housing 1, and the fluid inlet B8 is located between the outlet end of the first fluid channel 5 and the outlet end of the second fluid channel 7.

In this embodiment, the casing 1 has two open ends, one end of the casing is a fluid inlet 2 a, and a fluid inlet flange 12 a is disposed at the fluid inlet 2 a to hermetically connect a fluid input pipeline a; the other end of the mixing pipe is connected with a mixing pipe, the mixing pipe comprises a transition pipe 9, a first diffusion pipe 10 and a second diffusion pipe 11 which are connected in sequence, the transition pipe 9 is connected with the shell 1, a mixed fluid outlet 3 is formed at the rear end of the second diffusion pipe 11, and a mixed fluid outlet flange is arranged at the mixed fluid outlet 3 to be connected with a mixed fluid outlet pipeline in a sealing mode; a B fluid inlet nipple 13 and a B fluid inlet flange 14 are mounted at the B fluid inlet 8 of the housing to sealingly connect the B fluid inlet conduit.

It should be noted that, according to the bernoulli equation, the total energy of the mixed fluid is conserved, and the lower the flow rate, the higher the pressure. Pressure loss is generated due to viscosity of the mixed fluid when the mixed fluid flows in the pipeline, and the friction loss of the mixed fluid can be minimized by the secondary diffusion mode in the embodiment, and meanwhile, the pressure can be quickly recovered and increased.

Specifically, the inlet end of the first fluid channel 5 and the inlet end of the second fluid channel 7 are located on the same axis or horizontal line; the outlet end of the first fluid channel 5 extends into the transition pipe 9, so that a certain distance is kept between the fluid sprayed out of the first fluid channel 5 and the fluid sprayed out of the second fluid channel 7; in the embodiment, the fluid A is steam, the fluid B is water, the steam firstly enters the shell 1 through the fluid inlet 2A, two paths are formed under the action of the fluid nozzle 4 and the circular ring 6, the steam sprayed out of the second fluid channel 7 drives the water flow entering from the fluid inlet 8B to move forwards, and the gap of the second fluid channel 7 is small, so that the sprayed steam is in a film shape and is easy to condense with the water; steam ejected from the first fluid channel 5 at a high speed continuously drives water flow to move forwards into the transition pipe 9, the water flow is mixed in the transition pipe 9 and continuously moves forwards, and the speed is reduced and the pressure is increased in the first diffusion pipe 10 and the second diffusion pipe 11, so that the water flow is increased for the second time, the flowing speed of the water flow is increased, more water flow is brought into the mixing pipe, and the mixing ratio is improved; meanwhile, the lift of the diffusion pipe can be guaranteed under the action of the diffusion pipe.

Further, the diffusion angle a2 of the second diffusion tube 11 is greater than the diffusion angle a1 of the first diffusion tube 10, and the diffusion angle of the first diffusion tube 10 is not greater than 3 degrees, so that the first diffusion tube 11 can be regarded as a conical tube or a cylindrical tube, and has a cylindrical function to some extent to jointly increase the lift with the second diffusion tube 11; the transition pipe 9 is an inverted conical pipe, is used for mixing fluid, and plays a role in transition between the shell 1 and the diffusion pipe.

With continued reference to fig. 1, the centers of the housing 1, the ring 6, the fluid nozzle 4, the transition pipe 9, the first diffuser pipe 10 and the second diffuser pipe 11 are located on the same axis; overall structure is simple, reasonable in design, and stability is strong.

Further, the circular ring 6 near the end of the fluid inlet 2 a is formed with an inner conical surface 16 to allow the steam flowing through the second fluid passage 7 to be injected at a high speed.

The amount of entry of the second fluid passage 7 is enlarged.

Compared with the traditional product, the utility model provides a steam ejector, its total steam volume and tradition can set up to be as big, the sectional area sum of first fluid passage 5 and second fluid passage 7 is equal with the traditional sectional area that only has a main nozzle, compare with traditional product this moment, the steam volume of fluid nozzle is from the steam volume of first fluid passage 5 spun certainly and is less than traditional product, steam also easily condenses, on the one hand, the occupation space of steam has been reduced, certainly the suction water volume that gets into from B fluid entry 8 also can be bigger, thereby improved the mixing ratio, on the other hand has also reduced the jet noise of steam; further, under the action of the first diffusion pipe 10 and the second diffusion pipe 11, the mixed fluid is decelerated and pressurized, so that the problem that the traditional conical steam ejector is insufficient in lift is solved, and the problem that the mixing ratio of the cylindrical steam ejector is small is solved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A steam ejector is characterized by comprising a shell and a mixing pipe, wherein one end of the shell is provided with a fluid inlet A, the other end of the shell is connected with the mixing pipe, the other end of the mixing pipe is provided with a mixed fluid outlet, a fluid nozzle is arranged in the shell, a first fluid channel is formed in the fluid nozzle, a circular ring is further installed on the inner side wall of the shell, an annular second fluid channel is formed between the circular ring and the outer side wall of the fluid nozzle, and the outlet end of the second fluid channel is located between the outlet end of the first fluid channel and the inlet end of the first fluid channel; and a fluid B inlet is arranged on the side wall of the shell and is positioned between the outlet end of the first fluid channel and the outlet end of the second fluid channel.

2. The steam injector of claim 1, wherein the mixing tube comprises a transition tube, a first diffuser tube, and a second diffuser tube connected in series, the transition tube being connected to the housing, the second diffuser tube being provided with a mixed fluid outlet, the second diffuser tube having a diffusion angle that is greater than a diffusion angle of the first diffuser tube.

3. The steam injector of claim 2, wherein a diffusion angle of the first diffuser pipe is no greater than 3 degrees.

4. The steam injector of claim 2, wherein the transition tube is an inverted conical tube.

5. The steam injector of claim 2, wherein an outlet end of the first fluid passage extends into the transition duct.

6. The steam ejector of claim 2, wherein the fluid inlet a is provided with a fluid inlet flange, the fluid inlet B is provided with a fluid inlet adapter and a fluid inlet flange, and the mixed fluid outlet is provided with a mixed fluid outlet flange.

7. The steam injector of claim 2, wherein centers of the casing, the ring, the fluid nozzle, the transition duct, the first diffuser duct, and the second diffuser duct are located on a same axis.

8. The steam injector of claim 1, wherein the annular ring near the fluid inlet a is formed with an internal conical surface.

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