CN215026045U - Falling film pipe with steam outlet - Google Patents

Abstract

The utility model discloses a falling film pipe with a steam outlet, which comprises a falling film pipe body and an exhaust pipe; the exhaust pipe runs through and sets up in the top of falling film pipe body, and its first end is located falling film pipe originally internally, and the second end is located falling film pipe originally externally. In this scheme, link up through the top at falling liquid film pipe body and add the blast pipe to in the intraductal alkali steam of falling liquid film of discharge, with the velocity of flow that reduces falling liquid film pipe export alkali steam, and then reduced alkali steam and to falling washing away of membrane pipe, concentrator barrel and internals, thereby ensure to fall the life of membrane pipe, concentrator barrel and internals.

Description

Falling film pipe with steam outlet

Technical Field

The utility model relates to an alkali lye concentration technical field, in particular to take falling liquid film pipe of steam outlet.

Background

In the existing membrane falling pipe, a flange and a flange cover are generally adopted for top sealing, and then alkali liquor flows out to a cylinder body of the concentrator through a bottom outlet of the membrane falling pipe.

However, the flow velocity of the high-temperature alkali steam of the alkali liquor at the bottom of the falling film tube is high, which causes the problems of large scouring and high corrosion to the bottom of the falling film tube, the concentrator cylinder and internal parts such as the alkali receiving cup, the alkali tank and the hanging cylinder in the concentrator cylinder, and further influences the service life of the falling film tube, the concentrator cylinder and the internal parts.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a take membrane tube that falls of steam outlet link up at the top of falling liquid film pipe body and add the blast pipe to in the intraductal alkali steam of falling liquid film of discharging, in order to reduce the velocity of flow of falling liquid film pipe export alkali steam, and then reduced alkali steam to falling the washing away of membrane tube, concentrator barrel and internals, thereby ensure to fall the life of membrane tube, concentrator barrel and internals.

In order to achieve the above object, the utility model provides a following technical scheme:

a falling film pipe with a steam outlet comprises a falling film pipe body and an exhaust pipe;

the exhaust pipe runs through and sets up in the top of falling film pipe body, and its first end is located this internal, the second end is located this external of falling film pipe.

Preferably, the vent pipe is arranged coaxially with the falling film pipe body.

Preferably, the part of the exhaust pipe located in the falling film pipe body is provided with a through hole.

Preferably, the number of the through holes is multiple groups, and the through holes are distributed along the axial direction of the exhaust pipe.

Preferably, the groups of through holes are distributed more densely as they are closer to the first end of the exhaust pipe.

Preferably, each group of the through holes is a plurality of and evenly distributed along the circumferential direction of the exhaust pipe.

Preferably, two adjacent groups of the through holes are distributed along the circumferential direction of the exhaust pipe in a staggered manner.

Preferably, the number of the through holes is six, the number of the through holes in each group is three, and the diameter of the through holes is 12 mm.

Preferably, the falling film tube body further comprises:

and the impeller is fixedly arranged on the outer wall of the part of the exhaust pipe, which is positioned in the falling film pipe body.

Preferably, the number of the impellers is multiple, and the impellers are distributed along the axial direction of the exhaust pipe;

the impellers are distributed more sparsely closer to the first end of the exhaust pipe.

According to the above technical scheme, the utility model provides an among the falling film pipe of taking steam outlet, link up through the top at falling film pipe body and add the blast pipe to in discharging the intraductal alkali steam of falling film, with this flow velocity that can slow down the intraductal alkali steam of falling film, and then reduced alkali steam and to falling the washing away of membrane pipe, concentrator barrel and internals, thereby ensure to fall the life of membrane pipe, concentrator barrel and internals.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a falling film tube with a steam outlet according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an exhaust pipe according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a sectional view B-B of fig. 2.

Wherein, 10 is a falling film pipe body, 11 is an impeller, 12 is a falling film pipe inner pipe, 13 is a falling film pipe flange cover, 14 is a falling film pipe flange, and 15 is a falling film pipe alkali liquor inlet; 20 is an exhaust pipe, and 21 is a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a take falling film pipe of steam outlet, as shown in figure 1, including falling film pipe body 10 and blast pipe 20.

The exhaust pipe 20 is disposed through the top of the falling film tube body 10, and a first end of the exhaust pipe is located inside the falling film tube body 10, and a second end of the exhaust pipe is located outside the falling film tube body 10.

It should be noted that, as shown in fig. 1, the exhaust pipe 20 penetrates through the flange seal assembly disposed at the top of the falling film tube body 10, a first end of the exhaust pipe 20 is located at the middle lower part of the inner tube 12 of the falling film tube and serves as a high temperature alkali vapor inlet, and a second end of the exhaust pipe 20 serves as a high temperature alkali vapor outlet; in addition, the exhaust pipe 20 is also called a pressure relief pipe of the falling film pipe, so as to discharge a large amount of high-temperature alkali vapor out of the falling film pipe inner pipe 12. In addition, in the present embodiment, the exhaust pipe 20 is disposed on the top of the falling film pipe body 10 to cater to the flow direction of the high temperature alkali steam, so as to discharge more high temperature alkali steam. Certainly, a sealing structure is arranged between the exhaust pipe 20 and the top of the falling film pipe body 10 to prevent leakage of high-temperature alkali steam; wherein, this seal structure includes sealing washer or sealed glue, and this no longer gives details here.

According to the above technical scheme, the embodiment of the utility model provides a take steam outlet's falling film pipe has link up through the top at falling film pipe body and has increased the blast pipe to alkali steam in the discharge falling film pipe, with the velocity of flow that reduces falling film pipe export alkali steam, and then reduced alkali steam and to falling film pipe, concentrator barrel and internals's washing away, thereby ensure to fall the life of film pipe, concentrator barrel and internals.

In this embodiment, in order to facilitate better flow of the hot alkali vapor into the vent tube 20, it is desirable that the vent tube 20 be centered within the falling film tube inner tube 12; accordingly, as shown in fig. 1, the vent pipe 20 is coaxially disposed with the falling film tube body 10, that is, the vent pipe 20 is coaxially disposed with the falling film tube inner tube 12.

Further, in order to increase the intake air amount of the exhaust pipe 20, an additional intake passage needs to be added to the exhaust pipe 20 in addition to the first end of the exhaust pipe 20 for intake air; accordingly, as shown in fig. 1, a portion (pipe body) of the exhaust pipe 20 located inside the film dropping pipe body 10 is provided with a through hole 21.

Furthermore, in order to facilitate the alkali vapors of different levels to enter the exhaust pipe 20 so as to achieve axial coverage of the intake air, it is required that the exhaust pipe 20 is additionally provided with multiple sets of intake passages which are distributed along the axial direction; accordingly, as shown in fig. 2, the number of the through holes 21 is plural and distributed along the axial direction of the exhaust pipe 20.

In the scheme, the closer the alkali steam is to the bottom of the falling film tube body 10, the more the alkali steam is distributed, so that adaptive air inlet can be realized according to the capacity of the alkali steam; accordingly, as shown in fig. 2, the plurality of sets of through-holes 21 are more densely distributed as they are closer to the first end of the exhaust pipe 20. That is, the closer the pitch of the two adjacent sets of through holes 21 is to the first end of the exhaust pipe 20, the smaller.

Specifically, to facilitate entry of alkali vapors in different orientations into the exhaust duct 20 to facilitate circumferential coverage of the intake air; accordingly, as shown in fig. 3, each set of the through holes 21 is plural in number and uniformly distributed in the circumferential direction of the exhaust pipe 20.

Further, in order to increase the intake amount of the alkali vapor in adjacent layers, the intake directions of the two adjacent groups of through holes 21 are required to be designed differently, that is, the opening directions of the two adjacent groups of through holes 21 are required to be designed differently, that is, as shown in fig. 3 and 4, the two adjacent groups of through holes 21 are required to be distributed along the circumferential direction of the exhaust pipe 20 in a staggered manner. This scheme so designs to the complementary mode of admitting air of dislocation has been formed.

Still further, in order to obtain a better air intake effect of the exhaust pipe 20; preferably, as shown in fig. 2 and 3, the number of the through holes 21 is six groups, the number of the through holes 21 in each group is three, and the diameter of the through holes 21 is 12 mm. Of course, the size, number and distribution of the through holes 21 are not limited thereto, and may be further optimized and improved according to the actual use effect, that is, the size, number and distribution of the through holes 21 may be adaptively adjusted according to the actual use effect.

In this embodiment, the falling film tube body 10 further includes:

and an impeller 11 fixedly arranged on the outer wall of the part of the exhaust pipe 20 positioned in the film dropping pipe body 10. That is to say, this scheme is through addding impeller 11 to make alkali lye even on falling liquid film pipe 12, and then make the concentration effect of alkali lye better. Certainly, the impeller 11 is fixed, and the blades have a certain inclination angle, so that after the alkali liquor flows onto the blades, the alkali liquor flows onto the inner wall of the inner pipe 12 of the falling film pipe by utilizing the inclination angle, and a uniform film is formed. The impeller 11 is welded to the outer wall of the exhaust pipe 20.

Furthermore, in order to realize the axial coverage of uniform film formation of the alkali liquor; similarly, as shown in fig. 1, the number of the impellers 11 is plural, and is distributed along the axial direction of the exhaust pipe 20.

Furthermore, the closer the alkali vapor is to the bottom of the falling film tube body 10, the higher the concentration of the alkali vapor is, so that the uniform film formation with suitability can be realized according to the concentration of the alkali vapor; accordingly, as shown in FIG. 2, the plurality of impellers are distributed more sparsely as they approach the first end of the exhaust duct 20.

The scheme is further described by combining the specific embodiment as follows:

the utility model provides a take steam outlet's falling liquid film pipe has increased a center tube (for blast pipe 20 promptly) on the basis of membrane pipe falls now, and it has 18 phi 12 round holes to open on the center tube, lets alkali lye enter into the center tube through this hole at the alkali steam that the in-process of evaporation formed, then discharges again and falls the membrane pipe. Meanwhile, impellers are further distributed on the central tube of the falling film tube, and the impellers are beneficial to film forming of the falling film tube, so that the concentration effect is better.

The technical scheme of the utility model:

as shown in fig. 1, a central pipe (i.e. an exhaust pipe 20) is arranged in the center of a flange cover at the top of the falling film pipe, and is used as a high-temperature alkali steam outlet of the falling film pipe, which can also be called a pressure relief device of the falling film pipe, so that a large amount of high-temperature alkali steam is discharged from the central pipe, the alkali steam flow rate at the outlet of the falling film pipe is reduced, the scouring of the falling film concentrator cylinder and the internal parts thereof is reduced, and the service life of the falling film pipe, the concentrator cylinder and the internal part thereof hanging cylinder or the alkali receiving cup and the alkali tank is prolonged.

As shown in fig. 2, the central tube (i.e. the exhaust tube 20) is provided with 18 holes (i.e. through holes 21) of phi 12 (3 per turn, for 6 turns) which allow more alkali vapor to enter the exhaust tube; meanwhile, the central pipe is also provided with an impeller, and the impeller can ensure that the alkali liquor can form a film on the inner pipe of the membrane falling pipe uniformly, so that the concentration efficiency is higher.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The falling film tube with the steam outlet comprises a falling film tube body (10) and is characterized by further comprising an exhaust pipe (20);

the exhaust pipe (20) penetrates through the top of the falling film pipe body (10), the first end of the exhaust pipe is located in the falling film pipe body (10), and the second end of the exhaust pipe is located outside the falling film pipe body (10).

2. The falling film tube with steam outlet according to claim 1, characterized in that the degassing tube (20) is arranged coaxially to the falling film tube body (10).

3. The falling film tube with steam outlet according to claim 1, characterized in that the part of the exhaust pipe (20) inside the falling film tube body (10) is provided with through holes (21).

4. The falling film tube with steam outlet according to claim 3, characterized in that the number of through holes (21) is in groups and is distributed along the axial direction of the exhaust tube (20).

5. The falling film tube with steam outlet according to claim 4, characterized in that the plurality of sets of through holes (21) are distributed more densely as they are closer to the first end of the exhaust tube (20).

6. The falling film tube with steam outlet according to claim 4, characterized in that each group of through holes (21) is in a plurality and evenly distributed along the circumference of the exhaust tube (20).

7. The falling film tube with steam outlet according to claim 6, characterized in that two adjacent groups of through holes (21) are circumferentially staggered along the exhaust tube (20).

8. The falling film tube with steam outlet according to claim 6, characterized in that the number of through holes (21) is six groups, the number of through holes (21) in each group is three, and the diameter of the through holes (21) is 12 mm.

9. The falling film tube with steam outlet according to claim 1, characterized in that the falling film tube body (10) further comprises:

and the impeller (11) is fixedly arranged on the outer wall of the part of the exhaust pipe (20) positioned in the falling film pipe body (10).

10. The falling film tube with steam outlet according to claim 9, characterized in that the number of said impellers (11) is plural and distributed along the axial direction of said exhaust pipe (20);

the closer the impellers (11) are to the first end of the exhaust pipe (20), the more sparsely they are distributed.

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