A gas-liquid co-pipe type graphite absorption tower

Abstract

This utility model provides a gas-liquid co-pipe type graphite absorption tower, relating to the field of chemical equipment technology. The graphite absorption tower is divided into four parts from bottom to top: tower bottom, primary absorption zone, secondary absorption zone, and tower top. The lower end of the tower bottom is provided with a gas conduit inlet, and the side of the gas conduit inlet is provided with a liquid outlet. The primary absorption zone includes a graphite tower body, and the bottom of the graphite tower body is provided with a packing grid plate. The secondary absorption zone includes a graphite tower section, the bottom of the graphite tower section is provided with a packing grid plate, and the top of the graphite tower section is provided with a splash guard plate. The tower top is provided with an upper tower section, and the top of the upper tower section is provided with a gas outlet and a liquid inlet. The absorbent water enters the absorption tower through a conduit at the liquid inlet, and the gas outlet is used to discharge exhaust gas. The absorption tower of this utility model sets both the gas and liquid inlets and outlets in vertical channels, completely solving the problem of strength reduction caused by side openings in conventional tower bodies.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a gas-liquid co-pipe type graphite absorption tower. Background Technology

[0002] Industries such as chlor-alkali chemical industry commonly employ a combined process of "two-stage falling film absorber paired with tail gas absorption tower" to absorb hydrogen chloride gas. This process combination efficiently absorbs hydrogen chloride gas, producing hydrochloric acid as a byproduct. This combination is widely used and relatively mature in the industry. The commonly used graphite tail gas towers (also known as absorption towers) have a significant characteristic in their structural design: the liquid and gas inlet pipes are mostly installed on the side of the tower body. Because the graphite tubes themselves have a large wall thickness, the corresponding pipe opening size is also relatively large. However, as the final stage absorption device, the tail gas tower's diameter is usually not designed to be too large. This contradiction directly leads to two problems: first, opening holes on the side of the tower body easily causes a decrease in the strength of the graphite tube; second, when installing the tie rods used for fixing, the evenly distributed tie rods are prone to collision and interference with the graphite tube openings, causing inconvenience during installation.

[0003] Graphite absorption towers disclosed in patents such as 201620133973.7CN205392110U and CN206731132U all have holes opened on the side of the tower body, which easily leads to the above-mentioned problems.

[0004] For example, patent CN207413357U introduces a liquid distributor for graphite packed towers, which is currently a widely used type of distributor. Although this structure can effectively solve the problem of mist entrainment, the structure of this distributor still has defects: the size of its central liquid guiding channel is too large, which makes it occupy too much space inside the equipment.

[0005] The large amount of space occupied directly leads to two problems: first, the number of liquid holes is forced to decrease, affecting the distribution of liquid; second, there are situations where there are no liquid holes at all in the central area of ​​the distributor, creating blank areas for liquid distribution, which may adversely affect the overall absorption or reaction efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a gas-liquid co-pipe type graphite absorption tower and a compressor with the one-way valve, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas-liquid co-pipe type graphite absorption tower, wherein the graphite absorption tower is divided into four parts from bottom to top: tower bottom, primary absorption zone, secondary absorption zone and tower top. The lower end of the tower bottom is provided with a gas conduit inlet, and the side of the gas conduit inlet is provided with a liquid outlet. The gas conduit inlet is used to introduce hydrogen chloride gas, and the liquid outlet is used to discharge absorbed water.

[0008] The primary absorption zone includes a graphite tower body, and a packing grid plate is provided at the bottom of the graphite tower body;

[0009] The secondary absorption zone includes a graphite tower section, the bottom of which is provided with a packing grid plate II, and the top of which is provided with a splash guard plate;

[0010] The tower is equipped with an upper tower section at the top, and the top of the upper tower section is equipped with a gas outlet and a liquid inlet. The absorbent water enters the absorption tower through a conduit at the liquid inlet, and the gas outlet is used to discharge exhaust gas.

[0011] Preferably, the tower bottom includes a tower bottom support, a lower gas-liquid pipe seat, and a tower bottom section. The tower bottom support is fixedly supported below the tower bottom section, and the lower gas-liquid pipe seat is located below the tower bottom section and fixedly installed on the tower bottom support. The gas conduit inlet and liquid outlet are both located inside the lower gas-liquid pipe seat.

[0012] Preferably, the top of the lower gas-liquid pipe seat is fixedly installed on the lower graphite guide pipe, and the two are connected by a pipe bottom crimp flange.

[0013] Preferably, the gas conduit inlet is provided with a gas conduit, the outer diameter of which is smaller than that of the lower gas-liquid pipe seat and forms a cavity between the gas conduit and the lower gas-liquid pipe seat, the bottom of which is connected to the liquid outlet.

[0014] Preferably, the top of the gas conduit is provided with a spherical end cap, and the upper sidewall of the gas conduit is provided with several through holes.

[0015] Preferably, the packing grid is filled with packing material.

[0016] Preferably, the bottom of the graphite tower section is provided with a conical liquid collection platform, and the second packing grid plate is arranged above the conical liquid collection platform.

[0017] Preferably, the top of the tower includes a graphite support block, the lower end of which is supported on a splash guard and rests against the lower end of a liquid collection trough plate. The liquid collection trough plate contains a liquid collection trough and liquid distribution heads arranged at equal intervals. The bottom plate of the liquid collection trough plate has a drain hole. The top of the upper tower section has a top cover plate, and an upper gas-liquid pipe seat is installed on the top cover plate. The upper gas-liquid pipe seat is connected to the upper tower section through an upper graphite guide pipe.

[0018] Preferably, the upper gas-liquid pipe seat is provided with a liquid insert, the top of the liquid insert is connected to the liquid inlet, and there is a gap between the liquid insert and the upper tower section and the upper gas-liquid pipe seat, the gap being connected to the gas outlet.

[0019] Preferably, a long tie rod is provided at the edge of the top cover plate and the tower base support.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. The absorption tower of this utility model sets both the gas and liquid inlet and outlet in a vertical channel, which completely solves the problem of strength reduction caused by side openings in conventional towers.

[0022] 2. The tower body of this utility model uses long tie rods for sealing at the top and bottom, with springs installed below the top cover plate, providing space for the installation of upper pipelines. Since there are no openings on the sides of the tower sections, collisions and interference between the tie rods and pipe openings are effectively avoided. Overall, this design not only makes the tower body look simple and neat, but also significantly improves the convenience and efficiency of installation operations, achieving dual optimization in structural stability and practicality. Attached Figure Description

[0023] Figure 1 This is a front internal structure diagram of this utility model;

[0024] Figure 2 This is a front internal structure diagram of this utility model;

[0025] Figure 3 yes Figure 2 Enlarged view of point A inside.

[0026] In the diagram: 1 - base of the tower;

[0027] 11-Tower base support;

[0028] 12-Gas conduit;

[0029] 13-Lower gas-liquid tube seat;

[0030] 14-Pipe bottom crimp flange;

[0031] 15- Lower graphite guide pipe;

[0032] 16-Pyramid of the Tower;

[0033] 2- Primary absorption region;

[0034] 21-Stuffing grid plate one;

[0035] 22-Graphite Tower Body;

[0036] 3-Secondary absorption region;

[0037] 31 - Graphite Tower Festival;

[0038] 32-Conical liquid collecting platform;

[0039] 33-Stuffing grid plate two;

[0040] 34-Splash guard;

[0041] 4-Tower top;

[0042] 41-Graphite support block;

[0043] 42 - Upper Tower Section;

[0044] 43-Collection tank plate;

[0045] 44-Liquid Dispenser Head;

[0046] 45 - Drain hole;

[0047] 46 - Top cover plate;

[0048] 47- Upper graphite guide pipe;

[0049] 48-Upper gas-liquid tube seat;

[0050] 49-Liquid cannulation;

[0051] 5-Gas outlet;

[0052] 6-Liquid inlet;

[0053] 7-Liquid outlet;

[0054] 8-Gas conduit inlet. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0056] Please see Figures 1-3 This utility model provides a technical solution: a gas-liquid co-pipe type graphite absorption tower, which is divided into four parts from bottom to top: tower bottom 1, primary absorption zone 2, secondary absorption zone 3 and tower top 4. The lower end of the tower bottom 1 is provided with a gas conduit inlet 8, and the side of the gas conduit inlet 8 is provided with a liquid outlet 7. The gas conduit inlet 8 is used to introduce hydrogen chloride gas, and the liquid outlet 7 is used to discharge absorbed water.

[0057] The primary absorption zone 2 includes a graphite tower body 22, and a packing grid plate 21 is provided at the bottom of the graphite tower body 22.

[0058] The secondary absorption zone 3 includes a graphite tower section 31, the bottom of which is provided with a packing grid plate 33, and the top of which is provided with a splash guard plate 34.

[0059] The top of the tower 4 is provided with an upper tower section 42. The top of the upper tower section 42 is provided with a gas outlet 5 and a liquid inlet 6. The absorbent water enters the absorption tower through the conduit at the liquid inlet 6, and the gas outlet 5 is used to discharge the exhaust gas.

[0060] In this embodiment, the tower bottom 1 includes a tower bottom support 11, a lower gas-liquid pipe seat 13, and a tower bottom section 16. The tower bottom support 11 is fixedly supported below the tower bottom section 16. The lower gas-liquid pipe seat 13 is located below the tower bottom section 16 and is fixedly installed on the tower bottom support 11. The gas conduit inlet 8 and the liquid outlet 7 are both located inside the lower gas-liquid pipe seat 13. Hydrogen chloride gas enters the absorption tower through the gas conduit inlet 8, while the liquid is discharged through the liquid outlet 7. The lower gas-liquid pipe seat 13 is made of steel lined with PTFE or graphite.

[0061] In this embodiment, the top of the lower gas-liquid pipe seat 13 is fixedly installed on the lower graphite guide pipe 15 and the two are connected by a pipe bottom crimping flange 14, so that the lower graphite guide pipe 15 can be connected to the gas conduit inlet 8.

[0062] In this embodiment, a gas conduit 12 is provided inside the gas conduit inlet 8. The outer diameter of the gas conduit 12 is smaller than that of the lower gas-liquid pipe seat 13 and a cavity is formed between the gas conduit 12 and the lower gas-liquid pipe seat 13. The bottom of the cavity is connected to the liquid outlet 7. After the liquid flows from top to bottom, it will be discharged through the cavity and the liquid outlet 7. The gas conduit 12 is made of PVC, PP or quartz glass or other materials.

[0063] In this embodiment, the top of the gas conduit 12 is provided with a spherical end cap, which can effectively prevent the acid flowing down from above from entering the interior of the gas conduit 12. The upper side wall of the gas conduit 12 is provided with several through holes, and the total diameter of the through holes is not less than the inner diameter of the gas conduit 12, so that the gas can enter the absorption tower through the through holes.

[0064] In this embodiment, the packing grid plate 21 is filled with packing material.

[0065] In this embodiment, a conical liquid collecting platform 32 is provided at the bottom of the graphite tower section 31, and the packing grid plate 33 is positioned above the conical liquid collecting platform 32. When the absorbent flows through the upper packing layer to the middle of the tower, it exhibits a certain tendency to flow towards the wall. The conical liquid collecting platform 32 allows this portion of the liquid to detach from the tower wall and redistribute evenly to the lower packing layer. This effectively eliminates and reduces the "wall flow" phenomenon and the generation of a dry zone, thereby ensuring the stable operation of the graphite packed tower.

[0066] In this embodiment, the tower top 4 includes a graphite support block 41. The lower end of the graphite support block 41 is supported on the splash guard 34 and rests on the lower end of the liquid collection tank plate 43. The liquid collection tank plate 43 is provided with a liquid collection tank and liquid distribution heads 44 arranged at equal intervals. The bottom plate of the liquid collection tank plate 43 is provided with a drain hole 45. The top of the upper tower section 42 is provided with a top cover plate 46. An upper gas-liquid pipe seat 48 is installed on the top cover plate 46. The upper gas-liquid pipe seat 48 is connected to the upper tower section 42 through an upper graphite guide pipe 47. A liquid insertion pipe 49 is provided in the upper gas-liquid pipe seat 48. The top of the liquid insertion pipe 49 is connected to the liquid inlet 6. There is a gap between the liquid insertion pipe 49, the upper tower section 42, and the upper gas-liquid pipe seat 48. The gap is connected to the gas outlet 5. The cross-sectional area of ​​the gap between the liquid insertion pipe 49 and the upper gas-liquid pipe seat 48 is greater than or equal to the cross-sectional area of ​​the gas outlet 5. The upper gas-liquid tube seat 48 is made of steel lined with PTFE or graphite; the liquid cannula 49 is made of PVC or PP.

[0067] The top of the liquid cannula 49 is lower than the upper part of the liquid distribution head 44 and a certain height below the horizontal plane of the liquid collection tank plate 43, so as to guide the liquid and prevent liquid splashing.

[0068] Working principle: Hydrogen chloride gas flows in from gas inlet 8 and flows out from several through holes on the upper side of gas inlet 12. It enters the tower and is absorbed step by step through the primary absorption zone 2 and the secondary absorption zone 3. It flows out from the gap of splash plate 34 and enters the cavity of graphite support block 41 and upper tower section 42. It continues to rise and passes through the gap between liquid insertion pipe 49 at the top of the tower and upper gas-liquid pipe seat 48, and is discharged from gas outlet 5.

[0069] The absorbent water flows in from the liquid inlet 6 at the top of the tower through the conduit, passes through the liquid distribution head 44 and flows into the secondary absorption zone 3 and the primary absorption zone 2, and flows out from the liquid outlet 7 at the bottom of the tower.

[0070] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A gas-liquid co-pipe type graphite absorption tower, wherein the graphite absorption tower is divided into four parts from bottom to top: tower bottom (1), primary absorption zone (2), secondary absorption zone (3), and tower top (4), characterized in that: The bottom of the tower (1) is provided with a gas conduit inlet (8) at the lower end, and a liquid outlet (7) is provided on the side of the gas conduit inlet (8). The gas conduit inlet (8) is used to introduce hydrogen chloride gas, and the liquid outlet (7) is used to discharge the absorbed water. The primary absorption zone (2) includes a graphite tower body (22), and a packing grid plate (21) is provided at the bottom of the graphite tower body (22); The secondary absorption zone (3) includes a graphite tower section (31), the bottom of which is provided with a packing grid plate (33), and the top of which is provided with a splash guard (34). The top of the tower (4) is provided with an upper tower section (42), and the top of the upper tower section (42) is provided with a gas outlet (5) and a liquid inlet (6). The absorbent water enters the absorption tower through the conduit at the liquid inlet (6), and the gas outlet (5) is used to discharge the tail gas.

2. The gas-liquid co-tube graphite absorption tower according to claim 1, characterized in that: The tower bottom (1) includes a tower bottom support (11), a lower gas-liquid pipe seat (13), and a tower bottom section (16). The tower bottom support (11) is fixedly supported below the tower bottom section (16). The lower gas-liquid pipe seat (13) is located below the tower bottom section (16) and fixedly installed on the tower bottom support (11). The gas conduit inlet (8) and the liquid outlet (7) are both located inside the lower gas-liquid pipe seat (13).

3. The gas-liquid co-tube graphite absorption column according to claim 2, characterized in that: The top of the lower gas-liquid pipe seat (13) is fixedly installed on the lower graphite guide pipe (15), and the two are connected by a pipe bottom crimp flange (14).

4. The gas-liquid co-tube graphite absorption column according to claim 2, characterized in that: The gas conduit inlet (8) is provided with a gas conduit (12). The outer diameter of the gas conduit (12) is smaller than that of the lower gas-liquid pipe seat (13) and a cavity is formed between the gas conduit (13) and the lower gas-liquid pipe seat (13). The bottom of the cavity is connected to the liquid outlet (7).

5. The gas-liquid co-tube graphite absorption column according to claim 4, characterized in that: The gas conduit (12) is provided with a spherical end cap at the top, and a number of through holes are provided on the upper side wall of the gas conduit (12).

6. The gas-liquid co-tube graphite absorption column according to claim 1, characterized in that: The packing grid plate (21) is filled with packing material.

7. The gas-liquid co-tube graphite absorption column according to claim 1, characterized in that: The bottom of the graphite tower section (31) is provided with a conical liquid collection platform (32), and the packing grid plate II (33) is arranged above the conical liquid collection platform (32).

8. The gas-liquid co-tube graphite absorption column according to claim 2, characterized in that: The top of the tower (4) includes a graphite support block (41), the lower end of which is supported on a splash guard (34) and the lower end rests on the lower end of a liquid collection tank plate (43). The liquid collection tank plate (43) is provided with a liquid collection tank and liquid distribution heads (44) arranged at equal intervals. The bottom plate of the liquid collection tank plate (43) is provided with a drain hole (45). The top of the upper tower section (42) is provided with a top cover plate (46), and an upper gas-liquid pipe seat (48) is installed on the top cover plate (46). The upper gas-liquid pipe seat (48) is connected to the upper tower section (42) through an upper graphite guide pipe (47).

9. A gas-liquid co-pipe type graphite absorption tower according to claim 8, characterized in that: The upper gas-liquid pipe seat (48) is provided with a liquid insertion tube (49), the top of which is connected to the liquid inlet (6). There is a gap between the liquid insertion tube (49) and the upper tower section (42) and the upper gas-liquid pipe seat (48), and the gap is connected to the gas outlet (5).

10. The gas-liquid co-tube graphite absorption column according to claim 9, characterized in that: The top cover plate (46) is provided with a long pull rod at the edge position of the tower bottom support (11).

Images