Desorption tower

Abstract

The utility model discloses a desorption tower which is small in occupied area and short in desorption period, reduces the production cost and improves the production efficiency. The device comprises a cylinder body which comprises an upper cylinder body and a lower cylinder body, and the upper cylinder body and the lower cylinder body are fixedly connected; a top head; a bottom head; the upper partition assembly comprises an upper vertical partition plate and an upper bottom plate; the bottom partition assembly comprises an inclined partition plate and a lower vertical partition plate; a liquid collection ring; a liquid distributor; the two groups of filler assemblies are arranged at intervals; each group of filler assembly comprises a groove disc type liquid distributor and a lower filler layer; and a gas distributor.

Description

Technical Field

[0001] The utility model relates to the technical field of desorption tower structures, in particular to a desorption tower. Background Technique

[0002] A desorption tower is a device that separates some solutes in a solvent (liquid phase) with a gas or steam (gas phase). In a gas-liquid two-phase system, when the partial pressure of the solute component in the gas phase is lower than the gas-liquid equilibrium partial pressure of this component in its solution, mass transfer of the solute component from the liquid phase to the gas phase will occur, and this process is called desorption. For example, the process of the absorbed gas being released from the absorption liquid.

[0003] Desorption towers are widely used in the field of gas-liquid separation. However, in actual use, the existing desorption towers have relatively complex structures. Generally, multiple groups of desorption towers need to be arranged in series to complete the desorption of adsorbed gases, which makes the land area occupied by the desorption equipment large, and the desorption cycle is relatively long, which is not conducive to cost reduction and production efficiency improvement. Summary of the Invention

[0004] In view of the above problems, the utility model provides a desorption tower, which has a small floor area and a short desorption cycle, reduces production costs and improves production efficiency.

[0005] A desorption tower, characterized in that it includes:

[0006] A cylinder body, which includes an upper cylinder body and a lower cylinder body, and the upper cylinder body and the lower cylinder body are fixedly connected;

[0007] A top head;

[0008] A bottom head;

[0009] An upper partition component, which includes an upper vertical partition and an upper bottom plate;

[0010] A bottom partition component, which includes an inclined partition plate and a lower vertical partition;

[0011] A liquid collecting ring;

[0012] A liquid distributor;

[0013] Two groups of spaced-apart packing components, each packing component includes a trough-tray liquid distributor and a lower packing layer;

[0014] And a gas distributor;

[0015] The top head is installed on the top of the upper cylinder body, and the bottom head is installed on the bottom of the lower cylinder body. The upper cylinder body is divided into two cavities, namely a first cavity and a second cavity, by an upper vertical partition plate. The upper part of the upper vertical partition plate extends to the inner wall of the top head. The bottom of the first cavity is provided with an upper bottom plate. An absorbent liquid inlet is arranged on the outer wall of the upper middle part corresponding to the first cavity of the upper cylinder body. A gas phase outlet is arranged on the top head corresponding to the position of the first cavity. The absorbent liquid inlet is used to introduce absorbent liquid. The upper bottom plate is arranged near the bottom position of the upper cylinder body. A liquid outlet hole is opened on the upper bottom plate. A liquid collecting ring is arranged at the top position of the lower cylinder body. The area of the liquid collecting ring covers the area directly below the liquid outlet hole. The second cavity communicates with the upper cavity area of the lower cylinder body. A desorbed gas outlet is arranged on the upper cylinder body corresponding to the top position of the second cavity;

[0016] The lower outlet of the liquid collecting ring is connected with the liquid distributor, and the liquid distributor evenly sprays the liquid downward;

[0017] Two groups of spaced-apart packing components are sequentially and spacedly arranged below the liquid distributor, and the space area of the corresponding position of the lower cylinder body is filled with the packing layer below each group of packing components;

[0018] A gas distributor is arranged corresponding to the lower part of the lower packing component. The input end of the gas distributor is located outside the lower cylinder body and is a steam inlet;

[0019] An inclined partition plate is arranged below the gas distributor. The inclined partition plate covers at least two-thirds of the cross-section of the lower cylinder body but does not completely cover it. The annular wall of the inclined partition plate is closely attached to the inner wall of the corresponding lower cylinder body of its covered area. The lower end of the inclined partition plate is provided with the lower vertical partition plate. A flow space is left between the lower vertical partition plate and the inclined partition plate. The bottom of the lower vertical partition plate is closely attached to the inner wall of the bottom head. The lower vertical partition plate divides the cavity formed by the bottom of the lower cylinder body and the bottom head into a third cavity and a fourth cavity. The upper part of the third cavity is open and communicates with the space corresponding to the gas distributor. A liquid phase outlet communicating with the reboiler is arranged on the bottom head corresponding to the third cavity. An absorbent liquid outlet is arranged on the bottom head corresponding to the fourth cavity. The third cavity and the fourth cavity communicate through the flow space at the top. The liquid phase outlet and the absorbent liquid outlet flow out through two groups of cavities, so that the heavy components in the liquid phase medium are discharged through different outlets, playing a role of fractionation.

[0020] Its further feature is that:

[0021] An upwardly convex chimney structure is provided at a position corresponding to the upper part of the fourth cavity of the diagonal partition plate. A cap is installed on the upper part of the chimney structure to ensure that liquid does not enter the fourth cavity through the chimney structure, so that the chimney structure can only discharge gas;

[0022] A cyclone separator is provided at a position corresponding to the first cavity of the gas phase outlet to ensure reliable discharge of gas;

[0023] An anti-vortex device is provided above the liquid outlet hole to prevent the medium from generating vortices;

[0024] The liquid outlet hole is connected to the liquid collection area of the liquid collection ring through a connecting pipeline;

[0025] A wire mesh demister is provided in the lower end area of the second cavity. The wire mesh demister is used to purify the gas flowing through this position;

[0026] The gas distributor is a double-row blade gas distributor, which enables the gas phase medium to enter the equipment more uniformly, accelerates the reaction with the liquid phase medium flowing downward from the upper part, and improves the gas-liquid separation efficiency;

[0027] The tray-type liquid distributor can make the liquid phase medium spray more uniformly on the packing, so that the liquid phase medium collected in the upper part can react more uniformly and quickly with the gas phase medium in the lower part, improving the use efficiency of the equipment.

[0028] After adopting the above technical solution, the liquid phase medium enters the first cavity through the absorption liquid inlet. For the medium entering the upper layer of the first cavity, the gas part is discharged through the gas phase outlet on the top head, and the liquid part flows out through the liquid outlet hole on the bottom plate and enters the liquid collection ring under the partition plate. The liquid collection ring collects the medium components in the upper partition plate. The liquid distributor sprays the collected liquid phase components uniformly onto the packing assembly below. The liquid phase medium undergoes gas-liquid separation through the packing. The gas phase medium flows into the second cavity and then is discharged from the equipment through the desorbed gas outlet. There is a steam inlet at the lower part of the lower cylinder. The lower steam medium enters the equipment through the gas distributor. This distribution can make the steam medium enter the equipment more uniformly, accelerate the reaction with the liquid phase medium flowing downward from the upper part, and improve the gas-liquid separation efficiency; the combined arrangement of the diagonal partition plate and the lower vertical partition plate enables the heavy components in the liquid phase medium to be discharged through different outlets, playing a role in fractionation; it has a small floor area and a short desorption cycle, reducing production costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic front view structure diagram of the present invention;

[0030] Figure 2 For the present invention Figure 1 An enlarged schematic diagram of the upper part structure;

[0031] Figure 3 For the present utility model Figure 1 is an enlarged schematic view of the lower part structure;

[0032] The names corresponding to the serial numbers in the figure are as follows:

[0033] Tray liquid distributor 1, lower packing layer 2;

[0034] Cylindrical body 10, first cavity 101, second cavity 102, absorbent liquid inlet 103, desorbed gas outlet 104, steam inlet 105, third cavity 106, fourth cavity 107, liquid phase outlet 108, absorbent liquid outlet 109, upper cylindrical body 11, lower cylindrical body 12, top head 20, bottom head 30, upper partition assembly 40, upper vertical partition 41, upper bottom plate 42, liquid outlet hole 421, bottom partition assembly 50, inclined partition 51, lower vertical partition 52, flow space 53, chimney structure 54, cap 541, liquid collecting ring 60, liquid distributor 70, gas distributor 80, first packing assembly 90, second packing assembly 100, skirt support 110, cyclone separator 120, vortex breaker 130, connecting pipeline 140, wire mesh demister 150. Detailed implementation manners

[0035] A desorption tower, as shown in Figures 1-3 , which includes a cylindrical body 10, a top head 20, a bottom head 30, an upper partition assembly 40, a bottom partition assembly 50, a liquid collecting ring 60, a liquid distributor 70, two groups of spaced-apart packing assemblies, and a gas distributor 80;

[0036] The cylindrical body 10 includes an upper cylindrical body 11 and a lower cylindrical body 12, and the upper cylindrical body 11 and the lower cylindrical body 12 are fixedly connected;

[0037] The upper partition assembly 40 includes an upper vertical partition 41 and an upper bottom plate 42;

[0038] The bottom partition assembly 50 includes an inclined partition 51 and a lower vertical partition 52;

[0039] The two groups of spaced-apart packing assemblies are specifically the first packing assembly 90 and the second packing assembly 100; each group of packing assemblies includes a tray liquid distributor 1 and a lower packing layer 2. The tray liquid distributor 1 can make the liquid phase medium spray more evenly on the packing, so that the liquid phase medium collected in the upper part can react more evenly and quickly with the gas phase medium in the lower part, improving the use efficiency of the equipment;

[0040] The top head 20 is installed on the top of the upper cylindrical body 11, and the bottom head 30 is installed on the bottom of the lower cylindrical body 12. During specific implementation, a skirt support 110 is also fixedly provided below the bottom head;

[0041] The upper cylinder body 11 is divided into two cavities, i.e., the first cavity 101 and the second cavity 102, by the upper vertical partition plate 41. The upper part of the upper vertical partition plate 41 extends to the inner wall of the top head 20. The bottom of the first cavity 101 is provided with an upper bottom plate 42. The upper cylinder body 11 is provided with an absorbent liquid inlet 103 on the outer wall at the upper middle part corresponding to the upper part of the first cavity 101. The top head 20 is provided with a gas phase outlet 21 at the position corresponding to the first cavity 101. A cyclone separator 120 is installed at the position of the gas phase outlet 21 to ensure the reliable discharge of gas.

[0042] The absorbent liquid inlet 103 is used to introduce absorbent liquid. The upper bottom plate 42 is arranged near the bottom of the upper cylinder body 11. The upper bottom plate 42 is provided with a liquid outlet hole 421. A liquid collecting ring 60 is arranged at the top of the lower cylinder body 12. A vortex breaker 130 is arranged above the liquid outlet hole 421 to prevent the medium from generating vortices. The liquid outlet hole 421 is connected to the liquid collecting area of the liquid collecting ring 60 through a connecting pipeline 140.

[0043] The upper cylinder body 11 is provided with a desorbed gas outlet 104 at the position on one side of the top corresponding to the second cavity 102. A wire mesh demister 150 is arranged in the lower end area of the second cavity 102. The wire mesh demister 150 is used to purify the gas flowing through this position.

[0044] The lower outlet of the liquid collecting ring 60 is connected with a liquid distributor 70. The liquid distributor 70 evenly sprays the liquid downward.

[0045] The first packing component 90 and the second packing component 100 are sequentially arranged at intervals below the liquid distributor 70, and the space area of the lower cylinder body 12 corresponding to each group of packing components is filled with the lower packing layer 2.

[0046] A gas distributor 80 is arranged below the second packing component 100. The input end of the gas distributor 80 is located outside the lower cylinder body and is a steam inlet 105. The gas distributor 80 is a double-row blade gas distributor, which enables the gas phase medium to enter the equipment more evenly, accelerates the reaction with the liquid phase medium flowing downward from the upper part, and improves the gas-liquid separation efficiency.

[0047] Below the gas distributor 80, there is an inclined partition plate 51. The inclined partition plate 51 covers at least two-thirds of the cross-sectional area of the lower cylinder 11 but does not completely cover it. The annular wall of the inclined partition plate 51 is closely arranged against the inner wall of the corresponding lower cylinder 12 of its covered area. Below the lower end of the inclined partition plate 51, a vertical partition plate 52 is provided. There is a flow space 53 between the vertical partition plate 52 and the inclined partition plate 51. The bottom of the vertical partition plate 52 is closely arranged against the inner wall of the bottom head 30. The vertical partition plate 52 divides the cavity formed by the bottom of the lower cylinder 12 and the bottom head 30 into a third cavity 106 and a fourth cavity 107. The upper part of the third cavity 106 is open and communicates with the space corresponding to the gas distributor 80. The bottom head corresponding to the third cavity 106 is provided with a liquid phase outlet 108 communicating with the reboiler. The bottom head 30 corresponding to the fourth cavity 107 is provided with an absorbent liquid outlet 109. The third cavity 106 and the fourth cavity 107 communicate through the flow space 53 at the top. The liquid phase outlet 108 and the absorbent liquid outlet 109 flow out from two groups of cavities, so that the heavy components in the liquid phase medium are discharged through different outlets, playing a role in fractionation.

[0048] An upwardly convex chimney structure 54 is provided at the position above the inclined partition plate 51 corresponding to the fourth cavity 107. A cap 541 is installed on the upper part of the chimney structure 54, which ensures that liquid will not enter the fourth cavity 107 through the chimney structure 54, so that only gas can be discharged through the chimney structure.

[0049] The working principle is as follows: The liquid phase medium enters the first cavity through the absorbent liquid inlet. For the medium entering the upper layer of the first cavity, the gas part is discharged through the gas phase outlet on the top head through the cyclone separator, and the liquid part flows out through the liquid outlet holes on the bottom plate and enters the liquid collecting ring under the partition plate. The liquid collecting ring collects the medium components in the upper partition plate. The liquid distributor evenly sprays the collected liquid phase components onto the packing components below. The liquid phase medium undergoes gas-liquid separation through the packing. The gas phase medium flows into the second cavity and then is discharged from the equipment through the desorbed gas outlet. There is a steam inlet at the lower part of the lower cylinder. The lower steam medium enters the equipment through the gas distributor. This distribution can make the steam medium enter the equipment interior more evenly, accelerate the reaction with the downward flowing liquid phase medium in the upper part, and improve the gas-liquid separation efficiency; the combined arrangement of the inclined partition plate and the vertical partition plate enables the heavy components in the liquid phase medium to be discharged through different outlets, playing a role in fractionation; the inclined partition plate has two functions: one is to collect the liquid phase so that all liquid phase components can reach the third cavity; the other is to enable the gas phase medium in the fourth cavity to be discharged through the chimney structure, preventing the overflowed gas phase from being unable to be discharged due to the downward flow of the upper liquid phase, and making the discharged liquid phase as pure as possible to avoid the possibility of gas-liquid two-phase.

[0050] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A desorption tower, characterized in that, It includes: A cylinder body, which includes an upper cylinder body and a lower cylinder body, and the upper cylinder body and the lower cylinder body are fixedly connected; A top head; A bottom head; An upper partition assembly, which includes an upper vertical partition and an upper bottom plate; A bottom partition assembly, which includes an inclined partition plate and a lower vertical partition; A liquid collecting ring; A liquid distributor; Two groups of filler assemblies arranged at intervals, and each group of filler assemblies includes a tray type liquid distributor and a lower filler layer; And a gas distributor; The top head is covered on the top of the upper cylinder body, the bottom head is covered on the bottom of the lower cylinder body, the upper cylinder body is divided into two cavities, a first cavity and a second cavity, by the upper vertical partition, the upper part of the upper vertical partition extends to the inner wall of the top head, the bottom of the first cavity is provided with an upper bottom plate, an absorption liquid inlet is opened on the outer wall of the upper middle part corresponding to the first cavity of the upper cylinder body, a gas phase outlet is arranged at the position corresponding to the first cavity on the top head, the absorption liquid inlet is used to introduce absorption liquid, the upper bottom plate is arranged near the bottom position of the upper cylinder body, a liquid outlet hole is opened on the upper bottom plate, a liquid collecting ring is arranged at the top position of the lower cylinder body, and the area of the liquid collecting ring covers the area directly below the liquid outlet hole, the second cavity communicates with the upper cavity area of the lower cylinder body, and a desorbed gas outlet is arranged at the top position corresponding to the second cavity of the upper cylinder body; The lower outlet of the liquid collecting ring is connected with the liquid distributor, and the liquid distributor evenly sprays the liquid downward; The two groups of filler assemblies arranged at intervals are sequentially arranged at intervals below the liquid distributor, and the lower filler layer of each group of filler assemblies fills the space area of the corresponding lower cylinder body; A gas distributor is arranged below the lower filler assembly, and the input end of the gas distributor is located outside the lower cylinder body and is a steam inlet; An inclined partition plate is arranged below the gas distributor, and the inclined partition plate covers at least two-thirds of the cross-section of the lower cylinder body but does not completely cover it. The annular wall of the inclined partition plate is closely attached to the inner wall of the corresponding lower cylinder body of its covered area. A lower vertical partition is arranged below the low end of the inclined partition plate. There is a flow space between the lower vertical partition and the inclined partition plate. The bottom of the lower vertical partition is closely attached to the inner wall of the bottom head. The lower vertical partition divides the cavity formed by the bottom of the lower cylinder body and the bottom head into a third cavity and a fourth cavity. The upper part of the third cavity is open and communicates with the space corresponding to the gas distributor. A liquid phase outlet communicating with a reboiler is arranged on the bottom head corresponding to the third cavity. An absorption liquid outlet is arranged on the bottom head corresponding to the fourth cavity. The third cavity and the fourth cavity communicate through the flow space at the top. The liquid phase outlet and the absorption liquid outlet flow out through two groups of cavities.

2. The desorption column according to claim 1, wherein: A chimney structure protruding upward is arranged at the position above the fourth cavity of the inclined partition plate, and a cap is covered on the upper part of the chimney structure.

3. The desorption tower according to claim 1, characterized in that: A cyclone separator is arranged at the position corresponding to the first cavity of the gas phase outlet.

4. A desorption tower according to claim 1, characterized in that: A vortex breaker is arranged above the liquid outlet hole.

5. The desorption tower according to claim 1, characterized in that: The liquid outlet hole is connected to the liquid collection area of the liquid collection ring through a connecting pipeline.

6. The desorption tower according to claim 1, wherein: A wire mesh demister is arranged in the lower end area of the second cavity.

7. The desorption column according to claim 1, wherein: The gas distributor is a double-row vane gas distributor.

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