Gas absorption packed tower

Abstract

The utility model relates to a gas absorption packed tower. Different absorption units are combined into the same tower by using a multi-section series connection design. A liquid collecting tank is formed at the bottom of each tower section by combining the design of a riser, gas-liquid contact on the surface of each section of filler is realized through inter-section external circulation, the absorption effect is enhanced, each tower section is an independent absorption process, and the absorption efficiency of each absorption unit can be optimal by adjusting the absorption liquid circulation volume of the single tower section, so that the absorption efficiency of the tower section is improved. And the overall absorption efficiency of the absorption tower is maximized. The gas absorption packed tower has the advantages of low investment, small occupied area and convenience in automatic operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of chemical environmental protection equipment, specifically to a kind of gas absorption packing tower. BACKGROUND

[0002] Gas absorption is a common process in chemical production and environmental management, through the absorption reaction of vapor-liquid countercurrent in absorption tower, by increasing the packing in tower to realize gas-liquid contact surface increase to improve reaction efficiency. Therefore, gas absorption packing tower is more commonly used equipment in chemical process, in order to improve absorption efficiency, commonly used high-efficiency tower packing such as ceramic structured packing, also by the design of multiple towers in series to extend the gas-liquid exchange time to improve absorption effect, which increases investment, or increases floor area, resulting in increased production cost and investment, reduces economic benefits. SUMMARY

[0003] To solve the above problems, the application discloses a kind of gas absorption packing tower, by connecting absorption unit in series in the same tower, by intercalary outer circulation to realize the large-area contact reaction of gas and absorption liquid on the surface of packing, compared with multiple towers in series absorption, reduce floor area, facilitate centralized control and automatic operation.

[0004] A kind of gas absorption packing tower, by upper section tower section, middle section tower section, lower section tower section and tower base are formed, the middle of the top of the upper section tower section is provided with gas outlet and the side is provided with tower top temperature measuring port, the upper end of the side of the upper section tower section is provided with first absorption liquid inlet and the lower end is provided with first absorption liquid outlet, the lower side of the upper section tower section is provided with first absorption liquid outlet and the other side is provided with upper liquid level meter interface;The upper part of the middle section tower section is provided with second absorption liquid inlet, the lower side of the middle section tower section is provided with second absorption liquid outlet and the other side is provided with middle liquid level meter interface;The upper part of the lower section tower section is provided with third absorption liquid inlet and the lower side is sequentially provided with gas inlet and tower bottom temperature measuring port;The other side of the lower section tower section is sequentially provided with bottom liquid level meter interface and third absorption liquid outlet;Wherein the inner cavity bottom of the upper section tower section and the middle section tower section is uniformly provided with a plurality of lift tubes, the top of each lift tube is provided with rain cap.

[0005] Further, the upper and lower ends of each lift tube are provided with sawtooth; after increasing sawtooth, the ascending airflow disturbance is reduced, the descending liquid is uniformly distributed, the gas-liquid exchange effect is improved, and the structure is simple and easy to manufacture.

[0006] Further, the number of middle section tower section is greater than or equal to 1.

[0007] Further, the first absorption liquid inlet, the second absorption liquid inlet and the third absorption liquid inlet are respectively connected with a distributor.

[0008] Further, the height of the lift tube is 30-50 cm.

[0009] Further, the packing between each riser and the distributor is selected from ceramic structured packing or bulk Pall rings.

[0010] Further, the upper tower section, the middle tower section and the lower tower section are connected through flanges, and the lower tower section is welded to the tower base.

[0011] The working principle of the utility model is:

[0012] 1. The utility model is equivalent to connecting multiple absorption units in series, and the absorption liquid enters the absorption tower from the first absorption liquid inlet of the upper tower section, falls into the liquid collecting groove of the upper tower section through the distributor and the packing, and when the liquid level of the liquid collecting groove is 50%, the external circulating pump is started, the absorption liquid enters the first absorption liquid inlet through the circulating pump from the first absorption liquid outlet to realize the circulation of the absorption liquid of the upper tower section.

[0013] 2. When the liquid level of the liquid collecting groove in the upper tower section is higher than the riser, the absorption liquid overflows into the next tower section, i.e. the middle tower section, and when the liquid level of the liquid collecting groove of the middle tower section reaches 50%, the circulating pump of the middle tower section is started to realize the circulation of the absorption liquid of the middle tower section; similarly, when the liquid level of the liquid collecting groove of the lower tower section is higher than 50%, the circulating pump of the lower tower section is started to realize the circulation of the absorption liquid of the lower tower section; the ascending airflow disturbance is reduced after the sawtooth is added to the riser, the descending liquid is uniformly distributed, the gas-liquid exchange effect is improved, and the structure is simple and easy to manufacture.

[0014] 3. The gas with positive pressure enters the tower from the gas inlet of the lower tower section, enters the middle tower section and the upper tower section in turn from the riser, and at the surface of the packing of each tower section, the gas is fully contacted with the absorption liquid and is absorbed by the absorption liquid, and the tail gas is discharged from the gas outlet in the middle of the upper tower section;

[0015] 4. The solute concentration gradually increases in the process of the absorption liquid from the upper inlet to the lower outlet, and the absorption liquid is extracted from the lower tower section outlet after being close to saturation, the absorption efficiency is calculated by detecting the gas composition of the circulating liquid of the bottom tower section and the gas outlet of the top tower section, and the absorption efficiency is optimized by adjusting and controlling the absorption liquid addition amount of the upper tower section.

[0016] The utility model has the advantages that: the gas absorption packing tower connects the absorption units in series in the same tower, realizes the large-area contact reaction of the gas and the absorption liquid on the packing surface through the inter-section external circulation, realizes the optimization of the absorption efficiency of each absorption unit by controlling the circulating liquid flow of different tower sections, and makes the overall absorption efficiency and energy consumption of the absorption tower reach the best value. Compared with the multiple-tower series absorption, the utility model reduces the floor area, is convenient for centralized control and automatic operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses a structure schematic diagram.

[0018] Figure 2 , schematic diagram of the tower bottom structure;

[0019] Figure 3 、 Figure 2 A top view of

[0020] Figure 4 , an enlarged view of the serrations of the ascending duct;

[0021] List of reference numerals:

[0022] Among them, 1-gas inlet; 2-tower bottom temperature measuring port; 3ab-middle liquid level gauge interface; 4a-gas riser; 4b-rain cap; 5ab-upper liquid level gauge interface; 6-tower top temperature measuring port; 7-gas outlet; 8a-first absorption liquid inlet; 8-second absorption liquid inlet; 8c-third absorption liquid inlet; 9a-first absorption liquid outlet; 9b-second absorption liquid outlet; 9c-third absorption liquid outlet; 10ab-bottom liquid level gauge interface; A-upper tower section; B-middle tower section; C-lower tower section; D-tower base. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0024] like Figure 1 As shown, a gas absorption packed tower of this embodiment is composed of an upper tower section A, a middle tower section B, a lower tower section C and a tower base D. The upper tower section A, the middle tower section B and the lower tower section C are connected by flanges, and the lower tower section C is welded to the tower base.

[0025] The upper tower section A has a gas outlet 7 in the middle of the top and a tower top temperature measuring port 6 on the side. The upper end of the side of the upper tower section A is provided with a first absorption liquid inlet 8a and the lower end is provided with a first absorption liquid outlet 9a. The lower side of the upper tower section A is provided with a first absorption liquid outlet 9a and the other side is provided with an upper liquid level gauge interface 5ab.

[0026] The middle tower section B is provided with a second absorption liquid inlet 8b on the upper part, a second absorption liquid outlet 9b on the lower side and a middle liquid level gauge interface 3ab on the other side; the height of the riser 4a is 40-50cm.

[0027] like Figures 2-4As shown, the lower section tower section C is provided with a third absorption liquid inlet 8c at the upper portion and a gas inlet 1 and a tower bottom temperature measuring port 2 at the lower side in sequence; the other side of the lower section tower section C is provided with a bottom liquid level meter interface 10ab and a third absorption liquid outlet 9c in sequence; wherein the inner cavities of the upper section tower section A and the middle section tower section B are each provided with a plurality of lift tubes 4a, and the top of each lift tube 4a is provided with a rainproof cap 4b.

[0028] The upper and lower ends of each lift tube 4a are each provided with a sawtooth; after the sawtooth is added, the ascending airflow disturbance is reduced, the descending liquid is uniformly distributed, the gas-liquid exchange effect is improved, and the structure is simple and easy to manufacture; the included angle between every two adjacent sawteeth is 60 degrees.

[0029] The first absorption liquid inlet 8a, the second absorption liquid inlet 8b and the third absorption liquid inlet 8c are respectively connected with a distributor.

[0030] The space between each lift tube and the distributor is filled with packing, and the packing is selected from ceramic structured packing or bulk pail rings.

[0031] Embodiment

[0032] The absorption liquid enters the absorption tower from the absorption liquid inlet of the upper section tower section, falls into the upper section tower section liquid collecting groove through the distributor and the packing, and the liquid level of the liquid collecting groove is started to be higher than 50% to start the circulating pump, so that the absorption liquid enters the absorption liquid inlet from the outlet through the circulating pump to realize the absorption liquid circulation of the upper section tower section. When the liquid level of the upper section tower section liquid collecting groove is higher than the lift tube, the absorption liquid overflows into the next tower section (the middle section tower section), and similarly, when the liquid level of the middle section tower section liquid collecting groove reaches 50%, the circulating pump of the middle section tower section is started to realize the absorption liquid circulation of the middle section tower section; similarly, when the liquid level of the lower section tower section liquid collecting groove is higher than 50%, the circulating pump of the lower section tower section is started to realize the absorption liquid circulation of the lower section tower section. The gas with positive pressure enters the tower from the gas inlet of the lower section tower section, enters the middle section tower section and the upper section tower section from the lift tube in sequence, and at the surface of the packing of each tower section, the gas is fully contacted with the absorption liquid and is absorbed by the absorption liquid, and the tail gas is discharged from the middle gas outlet of the upper section tower section; the solute concentration gradually increases in the process of the absorption liquid from the upper section inlet to the lower section outlet, and the paper is extracted from the lower section tower section outlet after the paper quality approaches saturation, the gas composition of the bottom tower section circulating liquid and the top tower section gas outlet is detected, the absorption rate is calculated, and the absorption efficiency can be realized by adjusting and controlling the absorption liquid addition amount of the upper tower section and the absorption liquid extraction amount of the bottom tower section.

[0033] The technical means disclosed in the scheme of the application is not limited to the technical means disclosed in the above embodiment, and also includes the technical scheme composed of any combination of the above technical features.

Claims

1. A gas absorption packing tower, which is composed of an upper tower section (A), a middle tower section (B), a lower tower section (C) and a tower base (D), characterized in that: The upper section of the tower section (A) is provided with a gas outlet (7) in the middle of the top and a tower top temperature measuring port (6) on the side, the upper end of the side of the upper section of the tower section (A) is provided with a first absorption liquid inlet (8a) and the lower end is provided with a first absorption liquid outlet (9a), the lower side of the upper section of the tower section (A) is provided with a first absorption liquid outlet (9a) and the other side is provided with an upper liquid level meter interface (5ab); the middle section of the tower section (B) is provided with a second absorption liquid inlet (8b) at the upper part, the lower side of the middle section of the tower section (B) is provided with a second absorption liquid outlet (9b) and the other side is provided with a middle liquid level meter interface (3ab); the lower section of the tower section (C) is provided with a third absorption liquid inlet (8c) at the upper part and a gas inlet (1) and a tower bottom temperature measuring port (2) are sequentially arranged on the lower side; the other side of the lower section of the tower section (C) is sequentially provided with a bottom liquid level meter interface (10ab) and a third absorption liquid outlet (9c); wherein the inner cavities of the upper section of the tower section (A) and the middle section of the tower section (B) are uniformly distributed with a plurality of lift tubes (4a), and the top of each lift tube (4a) is provided with a rainproof cap (4b).

2. A gas absorbing packed column according to claim 1, characterized in that: The upper and lower ends of each lift tube (4a) are provided with sawteeth.

3. A gas absorbing packed column according to claim 1, characterized in that: The number of the middle section of the tower section (B) is greater than or equal to 1.

4. A gas absorbing packed column according to claim 1, characterized in that: The first absorption liquid inlet (8a), the second absorption liquid inlet (8b) and the third absorption liquid inlet (8c) are respectively connected with a distributor.

5. A gas absorbing packed column according to claim 1, characterized in that: The height of the lift tube (4a) is 30-50 cm.

6. A gas absorbing packed column according to claim 3, characterized in that: The space between each lift tube and the distributor is filled with packing, and the packing is selected from ceramic structured packing or bulk pail ring.

7. A gas absorbing packed column according to claim 3, characterized in that: The upper section of the tower section (A), the middle section of the tower section (B) and the lower section of the tower section (C) are connected through flanges, and the lower section of the tower section (C) is welded and connected with the tower base.

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