Liquid distributor of falling film absorption tower

Abstract

The utility model discloses a falling film absorption tower liquid distributor, and particularly relates to the technical field of liquid distributors, the falling film absorption tower liquid distributor comprises a tube plate and a heat exchange tube which are arranged in a falling film absorption tower, the tube plate is arranged outside the heat exchange tube, and a liquid distribution assembly for uniformly distributing liquid is arranged outside the top end of the heat exchange tube; the liquid distribution assembly comprises a plurality of inlets which are evenly formed in the outer portion of the heat exchange pipe. Liquid is distributed and conveyed to the inlet through the multiple drainage pieces, the flow speed of the liquid can be effectively reduced through the wavy drainage pieces, then the liquid can be distributed and scattered through the multiple distribution holes in the flow slowing plate, the effect of reducing the flow speed of the liquid again is achieved, and finally the flow speed of the liquid is reduced through the upper hopper with the funnel-shaped cross section and the lower hopper with the inverted funnel-shaped cross section. The flow direction of the liquid is gradually guided to the pipe wall of the heat exchange pipe along the cambered surfaces of the upper hopper and the lower hopper, so that a uniform and thin liquid film is formed on the pipe wall of the heat exchange pipe, and the situation that an effective liquid film cannot be formed due to too high flow speed is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid distributors, in particular to a falling film absorption tower liquid distributor. Background Art

[0002] Falling film absorber is an absorber in which the liquid contacts the gas phase in a film-like motion. The liquid distributor is an important component of the falling film absorber, which is directly related to the quality of the liquid film formation and the absorption efficiency of the absorber.

[0003] As shown in the application document of the prior art announcement number CN206566711U, it includes a tube sheet and a heat exchange tube, the heat exchange tube protrudes from the surface of the tube sheet, a zigzag overflow notch is provided at the top of the heat exchange tube, a baffle cap is provided above the heat exchange tube, the space between the baffle cap and the heat exchange tube forms an air outlet, and a plurality of liquid distribution ridges are provided at intervals along the circumferential direction on the inner wall of the heat exchange tube below the overflow notch, the liquid distribution ridges are in the shape of long strips, and the gaps between the liquid distribution ridges form film distribution channels. The technical solution has a simple structure, stable and reliable operation, complete and uniform film formation, and high absorption efficiency.

[0004] However, the liquid flow rate in the above technical solution is not sufficiently slowed down, so that the liquid still disperses and cannot effectively adhere to the tube wall to circulate and form a liquid film, which affects the use effect of the technical solution. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a falling film absorption tower liquid distributor, which diverts the liquid to the inlet through a plurality of drainage pieces, and the wavy drainage pieces can effectively reduce the flow rate of the liquid. The liquid can be diverted and broken up by a plurality of diversion holes on the slow flow plate to achieve the effect of reducing the liquid flow rate again. Finally, with the help of the upper and lower buckets with funnel-shaped and inverted funnel-shaped cross-sections, the flow direction of the liquid is gradually guided to the wall of the heat exchange tube along the curved surface of the upper and lower buckets, so as to form a uniform and thinner liquid film on the wall of the heat exchange tube, avoid excessive flow rate and the inability to form an effective liquid film, so as to solve the problems arising from the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a falling film absorption tower liquid distributor, comprising a tube sheet and a heat exchange tube installed in the falling film absorption tower, the tube sheet is installed outside the heat exchange tube, and a liquid distribution component for uniform liquid distribution is provided outside the top of the heat exchange tube;

[0007] The liquid distribution component includes a plurality of inlets, and the plurality of inlets are evenly opened on the outside of the heat exchange tube. An upper bucket and a lower bucket are arranged between the plurality of inlets. The upper bucket is installed on the top of the lower bucket. The upper bucket and the lower bucket are both installed inside the heat exchange tube. The outside of the upper bucket is fixed to the inner wall of the heat exchange tube. The cross-section of the upper bucket is set to be funnel-shaped, and the cross-section of the lower bucket is set to be inverted funnel-shaped. Through the upper bucket and the lower bucket with funnel-shaped and inverted funnel-shaped cross-sections, the flow direction of the liquid will be gradually guided to the wall of the heat exchange tube along the curved surface of the upper bucket and the lower bucket, so as to form a uniform and thinner liquid film on the wall of the heat exchange tube, thereby avoiding excessive flow rate and failure to form an effective liquid film.

[0008] In a preferred embodiment, a plurality of guide members are installed outside the heat exchange tube, and the plurality of guide members are evenly spaced apart. The cross-section of the guide members is set to be wavy, and the liquid is diverted and transported to the inlet through the plurality of guide members, and the wavy guide members can effectively reduce the flow rate of the liquid.

[0009] In a preferred embodiment, a flow channel is opened between two adjacent guide members, and the flow channel is connected to the inlet. Through the connection between the flow channel and the inlet, the liquid can be slowly transported to the inlet to prevent the liquid from being sprayed into the heat exchange tube through the inlet due to excessive impact force.

[0010] In a preferred embodiment, two slow flow plates are provided inside the inlet, and the sides of the two slow flow plates that are far away from each other are fixed together with the inner wall of the inlet, and the sides of the two slow flow plates that are close to each other are penetrated with multiple diversion holes, and the multiple diversion holes are evenly spaced. Through the multiple diversion holes on the slow flow plates, the liquid can be diverted and broken up, thereby achieving the effect of reducing the liquid flow rate and avoiding the flow rate being too fast to effectively form a liquid film.

[0011] In a preferred embodiment, a baffle is provided on the top of the heat exchange tube, and a plurality of pillars are installed at the bottom of the baffle. The plurality of pillars are evenly spaced and the bottom ends of the pillars are fixed to the top of the heat exchange tube. By setting the baffle, the top of the heat exchange tube can be shielded and protected.

[0012] In a preferred embodiment, an air hole is provided between two adjacent pillars, and the provision of the air hole can facilitate gas discharge.

[0013] Technical effects and advantages of the utility model:

[0014] The liquid is diverted and transported to the inlet through multiple guide pieces, and the wavy guide pieces can effectively reduce the flow rate of the liquid to prevent the liquid from being sprayed into the inside of the heat exchange tube through the inlet due to excessive impact force. Then, the liquid can be diverted and broken up by multiple diversion holes on the slow flow plate to achieve the effect of reducing the liquid flow rate again. Finally, with the help of the upper and lower buckets with funnel-shaped and inverted funnel-shaped cross-sections, the flow direction of the liquid will be gradually guided to the wall of the heat exchange tube along the curved surface of the upper and lower buckets, so as to form a uniform and thin liquid film on the wall of the heat exchange tube, thereby preventing the flow rate from being too high to form an effective liquid film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a front view of the drainage member of the utility model;

[0017] Figure 3 This is a cross-sectional view of the heat exchange tube of the utility model;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of part A in the middle;

[0019] Figure 5 It is a cross-sectional view of the import of the utility model.

[0020] The figures are marked as follows: 1. tube sheet; 2. heat exchange tube; 3. inlet; 4. upper bucket; 5. lower bucket; 6. flow guide; 7. flow channel; 8. slow flow plate; 9. diversion hole; 10. baffle; 11. support; 12. air hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Refer to the instruction manual Figure 1-5 The utility model provides a liquid distributor for a falling film absorption tower, comprising a tube sheet 1 and a heat exchange tube 2 installed in the falling film absorption tower, wherein the tube sheet 1 is installed outside the heat exchange tube 2, and a liquid distributor component for uniform liquid distribution is provided outside the top end of the heat exchange tube 2;

[0023] In order to facilitate the formation of liquid film by slowing down the flow rate, such as Figure 2-5As shown, the liquid distribution assembly includes a plurality of inlets 3, and the plurality of inlets 3 are evenly opened on the outside of the heat exchange tube 2. An upper bucket 4 and a lower bucket 5 are arranged between the plurality of inlets 3. The upper bucket 4 is installed on the top of the lower bucket 5. The upper bucket 4 and the lower bucket 5 are both installed inside the heat exchange tube 2. The outside of the upper bucket 4 is fixed to the inner wall of the heat exchange tube 2. The cross section of the upper bucket 4 is set to be funnel-shaped, and the cross section of the lower bucket 5 is set to be inverted funnel-shaped.

[0024] The specific effect is that, through the upper bucket 4 and the lower bucket 5 with funnel-shaped and inverted funnel-shaped cross-sections, the flow direction of the liquid will be gradually guided to the wall of the heat exchange tube 2 along the curved surface of the upper bucket 4 and the lower bucket 5, so as to form a uniform and thin liquid film on the wall of the heat exchange tube 2, avoid excessive flow rate to form an effective liquid film, ensure the liquid distribution effect of the utility model, and improve the practicality of the utility model.

[0025] In order to facilitate the diversion of liquid and slow down the flow rate, Figure 1-4 As shown, a plurality of guide members 6 are installed outside the heat exchange tube 2, and the plurality of guide members 6 are evenly spaced apart. The cross-section of the guide members 6 is set to be wavy, and the liquid is diverted and transported to the inlet 3 through the plurality of guide members 6. The wavy guide members 6 can effectively reduce the flow rate of the liquid. A flow channel 7 is opened between two adjacent guide members 6, and the flow channel 7 is connected with the inlet 3. Through the connection between the flow channel 7 and the inlet 3, the liquid can be slowly transported to the inlet 3, thereby preventing the liquid from being sprayed into the inside of the heat exchange tube 2 through the inlet due to excessive impact.

[0026] In order to facilitate the secondary separation and deceleration of the decelerated liquid, the flow velocity can be further slowed down, such as Figure 3 and 4 As shown, two slow flow plates 8 are provided inside the inlet 3, and the sides of the two slow flow plates 8 that are far away from each other are fixed together with the inner wall of the inlet 3, and the sides of the two slow flow plates 8 that are close to each other are penetrated with multiple diversion holes 9, and the multiple diversion holes 9 are evenly spaced. Through the multiple diversion holes 9 on the slow flow plates 8, the liquid can be diverted and broken up, so as to achieve the effect of reducing the liquid flow rate and avoid the flow rate being too fast to effectively form a liquid film.

[0027] In order to facilitate the discharge of gas, Figure 1 and 2 As shown, a baffle 10 is provided on the top of the heat exchange tube 2, and a plurality of pillars 11 are installed at the bottom of the baffle 10. The plurality of pillars 11 are evenly spaced and fixed to the top of the heat exchange tube 2 at the bottom end. By setting the baffle 10, the top of the heat exchange tube 2 can be shielded and protected. An air hole 12 is provided between two adjacent pillars 11. The setting of the air hole 12 can facilitate gas discharge.

[0028] The liquid on the tube sheet 1 is diverted and transported to the inlet 3 through multiple guide pieces 6, and the wavy guide piece 6 can effectively reduce the flow rate of the liquid to prevent the flow rate from being sprayed into the heat exchange tube 2 through the inlet 3 due to excessive impact. The multiple diversion holes 9 on the slow flow plate 8 in the inlet 3 can break up the liquid diversion to achieve the effect of reducing the liquid flow rate again, and the liquid flowing into the heat exchange tube 2 gradually contacts the upper bucket 4 and the lower bucket 5. Because the cross-sections of the upper bucket 4 and the lower bucket 5 are funnel-shaped and inverted funnel-shaped, the flow direction of the liquid will be gradually guided to the wall of the heat exchange tube 2 along the curved surface of the upper bucket 4 and the lower bucket 5, so as to form a uniform and thin liquid film on the wall of the heat exchange tube 2. During the descent process, the liquid film contacts the rising gas in the heat exchange tube 2 to complete absorption and mass transfer, and finally the gas is discharged through the pores 12.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A falling film absorption tower liquid distributor, comprising a tube sheet (1) and a heat exchange tube (2) installed in the falling film absorption tower, wherein the tube sheet (1) is installed outside the heat exchange tube (2), and is characterized in that: A liquid distribution component for evenly distributing liquid is provided on the outside of the top end of the heat exchange tube (2); The liquid distribution component comprises a plurality of inlets (3), the plurality of inlets (3) being evenly arranged outside the heat exchange tube (2), an upper bucket (4) and a lower bucket (5) being arranged between the plurality of inlets (3), the upper bucket (4) being mounted on the top of the lower bucket (5), the upper bucket (4) and the lower bucket (5) being both mounted inside the heat exchange tube (2), the outer portion of the upper bucket (4) being fixed to the inner wall of the heat exchange tube (2), the cross section of the upper bucket (4) being arranged to be funnel-shaped, and the cross section of the lower bucket (5) being arranged to be inverted funnel-shaped.

2. The falling film absorption tower liquid distributor according to claim 1, characterized in that: A plurality of flow guide members (6) are installed outside the heat exchange tube (2), the plurality of flow guide members (6) are evenly spaced and distributed, and the cross-section of the flow guide members (6) is designed to be wavy.

3. A falling film absorption tower liquid distributor according to claim 2, characterized in that: A flow channel (7) is provided between two adjacent flow guide members (6), and the flow channel (7) is connected to the inlet (3).

4. The falling film absorption tower liquid distributor according to claim 1, characterized in that: Two slow flow plates (8) are arranged inside the inlet (3); the two slow flow plates (8) are fixed to the inner wall of the inlet (3) on the sides away from each other; and the two slow flow plates (8) are penetrated by a plurality of flow diversion holes (9) on the sides close to each other; the plurality of flow diversion holes (9) are evenly spaced and distributed.

5. The falling film absorption tower liquid distributor according to claim 1, characterized in that: A baffle (10) is provided on the top of the heat exchange tube (2), and a plurality of pillars (11) are installed on the bottom of the baffle (10). The plurality of pillars (11) are evenly spaced and distributed, and the bottom ends of the pillars (11) are fixed to the top of the heat exchange tube (2).

6. A falling film absorption tower liquid distributor according to claim 5, characterized in that: An air hole (12) is provided between two adjacent pillars (11).

Images