Absorption device with deodorization function

Abstract

The utility model relates to an absorption device with a deodorization function, and belongs to the technical field of gas purification. Comprising a body; a waste gas pipeline, a water pipeline, an amine-rich pipeline and an amine-poor pipeline are sequentially arranged on the side surface of the body from bottom to top; a water sump is arranged on the lower portion of the body, and the waste gas pipeline is communicated with the interior of the water sump. The lean amine pipeline is positioned at the upper part of the body; an annular liquid seal groove is formed in the body between the lean amine pipeline and the water pipeline, and a gas channel is formed in the center of the liquid seal groove; a conical cover is mounted above the liquid seal tank and is connected with the liquid seal tank through a plurality of supporting rods; the diameter of the bottom face of the conical cover is larger than that of the gas channel and smaller than the outer diameter of the liquid seal groove. And the rich amine pipeline is communicated with the liquid seal tank. According to the utility model, efficient adsorption is still ensured while equipment is reduced, and the problem of gas leakage at the joint of the equipment caused by excessive equipment is directly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas purification, in particular to an absorption device with a deodorizing function. Background Art

[0002] Petroleum cracking is a petroleum processing process that obtains short-chain unsaturated hydrocarbons as the main components. It breaks hydrocarbons with long-chain molecules into various short-chain gaseous hydrocarbons and a small amount of liquid hydrocarbons to provide organic chemical raw materials. It is a very important link in the field of petrochemicals. The chemical process of petroleum cracking is relatively complex. The cracked gas generated is a complex mixed gas. In addition to unsaturated hydrocarbons such as ethylene, propylene, butadiene, it also contains methane, ethane, hydrogen, hydrogen sulfide, sulfur dioxide, etc. Acidic sulfide gas is the main factor causing acid rain. Therefore, after these waste gases are generated, they need to be harmlessly treated.

[0003] In the current actual production process, multiple tanks are usually required to be used together. First, water is used to perform a preliminary treatment on the acidic gas and a preliminary absorption of the water-soluble gas; then the gas enters the alkali liquid tank or the lean amine tank for further deep absorption. Since multiple tanks are used together, the tanks are connected by pipes. After a long period of operation, the sealing rings and flanges at the pipe joints are corroded by the acidic gas, and are prone to aging and damage, resulting in the leakage of harmful gases. Since sulfides have a certain odor, there is always a bad smell near the production area. This requires staff to regularly replace the sealing rings and pipes. The replacement requires parking, and each parking inspection consumes a lot of manpower and material resources. Utility Model Content

[0004] In view of the problem of gas leakage at the connection points of the equipment caused by too many devices for treating waste gas in the prior art, the utility model provides an absorption device with a deodorizing function to solve the above problem.

[0005] An absorption device with a deodorizing function comprises a body; a waste gas pipeline, a water pipeline, a rich amine pipeline and a lean amine pipeline are sequentially arranged on the side of the body from bottom to top; a water tank is arranged at the lower part of the body, the waste gas pipeline is communicated with the inside of the water tank, and the water pipeline is used to supply water to the water tank; the lean amine pipeline is located at the upper part of the body; an annular liquid sealing groove is arranged inside the body between the lean amine pipeline and the water pipeline, and a gas channel is arranged in the center of the liquid sealing groove; a conical cover is installed above the liquid sealing groove, and the conical cover is connected to the liquid sealing groove through a plurality of support rods; the bottom surface diameter of the conical cover is larger than the diameter of the gas channel and smaller than the outer diameter of the liquid sealing groove; the rich amine pipeline is communicated with the liquid sealing groove.

[0006] Furthermore, an exhaust pipe is provided on the top of the main body. After the exhaust gas passes through the liquid seal tank, the remaining substances are mainly hydrocarbons and nitrogen and other gases that are not soluble in water, and then enter the VOC treatment facility through the exhaust pipe for pressurization and then enter the low-pressure gas official website for recycling.

[0007] Furthermore, a vertical partition is provided at the bottom of the main body, and the height of the partition is higher than the water pipe; the partition divides the lower part of the main body into a water tank and an overflow tank; an acid pipe is provided at the bottom of the overflow tank. In actual production, the water in the water pipe needs to flow into the water tank continuously to ensure that the water-soluble gas absorbed in the water tank remains in an unsaturated state. When the water level is higher than the partition, it will overflow into the overflow tank and be discharged from the acid pipe. Through such a setting, it can be ensured that the water in the water tank is always in an unsaturated state during production.

[0008] Furthermore, the interior of the main body is located below the lean amine pipeline, and an absorption layer is provided inside the main body between the lean amine pipeline and the conical cover. The absorption layer is filled with resin, and the lean liquid entering the main body from the lean liquid pipeline first passes through the absorption layer, and the resin absorbs a part of the lean amine, and the excess lean amine flows into the liquid seal groove below the absorption layer. The gas passing through the liquid seal groove may also carry a very small amount of acidic gas. By providing the absorption layer, it can be ensured that the acidic gas in the exhaust gas is removed as cleanly as possible. Since a conical cover is provided below the absorption layer, and the diameter of the bottom of the conical cover is larger than the diameter of the gas pipeline, the lean amine flowing down from the absorption layer is drained into the liquid seal groove and will not flow into the water tank at the bottom of the main body.

[0009] Furthermore, a drainage pipe is provided at the bottom of the water tank. After the production is finished, the acid can be discharged through the drainage pipe at the bottom of the water tank.

[0010] Furthermore, the body is provided with a sight glass at the position of the liquid seal groove for observing the liquid level of the lean amine liquid in the liquid seal groove, ensuring that the liquid level of the lean amine in the liquid seal groove is lower than the top of the gas pipeline, and at the same time ensuring that the bottom edge of the conical cover is immersed in the lean amine liquid to play a role of liquid sealing.

[0011] The working principle of the utility model is as follows: when adsorbing waste gas, open the water pipe and fill the water tank with water; at the same time, open the lean amine pipe and inject the lean amine liquid into the liquid seal tank; the liquid level of the lean amine liquid in the liquid seal tank should be lower than the top of the gas pipe, and at the same time, immerse the conical cover in the lean amine liquid. Then open the waste gas pipe to allow the waste gas to enter the adsorption device. The waste gas entering the device first passes through the water tank, and after being adsorbed by water, some of the substances in the waste gas that are easily soluble in water, such as hydrogen sulfide, sulfur dioxide, and ammonia, are first adsorbed, and at the same time, the temperature of the waste gas is reduced to about 40°C; then the gas coming out of the water tank moves upward, overflows from the gas pipe into the lean amine liquid in the liquid seal tank, and after further adsorption by the lean amine liquid, the acid gas content in the waste gas is reduced to an extremely low level and is discharged from the tail gas pipe at the top of the tower.

[0012] The beneficial effects of the utility model are:

[0013] The absorption device with deodorization function provided by the utility model only uses an independent tower-shaped device. After the gas enters the interior, it can be adsorbed at least twice, and the acidic and water-soluble gases in the waste gas are thoroughly adsorbed. While reducing the equipment, efficient adsorption is still guaranteed, directly solving the problem of gas leakage at the equipment connection caused by too many equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0016] In the figure, 1-main body, 2-exhaust gas pipeline, 3-water pipeline, 4-rich amine pipeline, 5-lean amine pipeline, 6-tail gas pipeline, 7-acid pipeline, 8-drainage pipeline, 9-water tank, 10-conical cover, 11-support rod, 12-absorption layer, 13-liquid sealing groove, 14-partition, 15-overflow tank. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0018] Example 1

[0019] An absorption device with a deodorizing function comprises a body 1; a waste gas pipe 2, a water pipe 3, a rich amine pipe 4 and a lean amine pipe 5 are sequentially arranged on the side of the body 1 from bottom to top; a water tank 9 is arranged at the lower part of the body 1, the waste gas pipe 2 is communicated with the inside of the water tank 9, and the water pipe 3 is used to supply water to the water tank 9; the lean amine pipe 5 is located at the upper part of the body 1; an annular liquid sealing groove 13 is arranged inside the body 1 between the lean amine pipe 5 and the water pipe 3, and a gas channel is arranged at the center of the liquid sealing groove 13; a conical cover 10 is installed above the liquid sealing groove 13, and the conical cover 10 is connected to the liquid sealing groove 13 through a plurality of support rods 11; the bottom surface diameter of the conical cover 10 is larger than the diameter of the gas channel and smaller than the outer diameter of the liquid sealing groove 13; the rich amine pipe 4 is communicated with the liquid sealing groove 13.

[0020] Example 2

[0021] An absorption device with deodorization function comprises a body 1; a waste gas pipe 2, a water pipe 3, a rich amine pipe 4 and a lean amine pipe 5 are arranged on the side of the body 1 from bottom to top in sequence; a water tank 9 is arranged at the lower part of the body 1, the waste gas pipe 2 is connected to the inside of the water tank 9, and the water pipe 3 is used to supply water to the water tank 9; a drainage pipe 8 is arranged at the bottom of the water tank 9; a vertical partition 14 is arranged at the bottom of the body 1, and the height of the partition 14 is higher than the water pipe 3; the partition 14 divides the lower part of the body 1 into the water tank 9 and the overflow tank 15; an acid liquid pipe 7 is arranged at the bottom of the overflow tank 15; the lean amine pipe 5 is located at the upper part of the body 1; the lean amine pipe 5 An annular liquid seal groove 13 is arranged inside the main body 1 between the main body 1 and the water pipe 3, and a gas channel is arranged in the center of the liquid seal groove 13; a conical cover 10 is installed above the liquid seal groove 13, and the conical cover 10 is connected to the liquid seal groove 13 through a plurality of support rods 11; the bottom diameter of the conical cover 10 is larger than the diameter of the gas channel and smaller than the outer diameter of the liquid seal groove 13; an absorption layer 12 is arranged inside the main body 1 between the lean amine pipe 5 and the conical cover 10, and the absorption layer 12 is filled with resin; the rich amine pipe 4 is connected to the liquid seal groove 13; an exhaust pipe 6 is arranged on the top of the main body 1; and a sight glass is arranged at the position of the main body 1 located in the liquid seal groove 13.

[0022] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. An absorption device with deodorization function, comprising a body; a waste gas pipeline, a water pipeline, a rich amine pipeline and a lean amine pipeline are arranged on the side of the body from bottom to top; characterized in that: A water tank is provided at the lower part of the main body, the exhaust gas pipeline is connected to the inside of the water tank, and the water pipeline is used to supply water to the water tank; the lean amine pipeline is located at the upper part of the main body; an annular liquid seal groove is provided inside the main body between the lean amine pipeline and the water pipeline, and a gas channel is provided in the center of the liquid seal groove; a conical cover is installed above the liquid seal groove, and the conical cover is connected to the liquid seal groove through a plurality of support rods; the bottom diameter of the conical cover is larger than the diameter of the gas channel and smaller than the outer diameter of the liquid seal groove; the rich amine pipeline is connected to the liquid seal groove.

2. The absorption device with deodorization function according to claim 1, characterized in that: An exhaust pipe is arranged on the top of the main body.

3. The absorption device with deodorization function according to claim 1, characterized in that: A vertical partition is arranged at the bottom of the main body, and the height of the partition is higher than the water pipe; the partition divides the lower part of the main body into a water tank and an overflow tank; an acid liquid pipe is arranged at the bottom of the overflow tank.

4. The absorption device with deodorization function according to claim 1, characterized in that: An absorption layer is arranged inside the body between the lean amine pipeline and the conical cover, and the absorption layer is filled with resin.

5. The absorption device with deodorization function according to claim 1, characterized in that: A drainage pipe is provided at the bottom of the water tank.

6. The absorption device with deodorization function according to claim 1, characterized in that: The main body is provided with a sight glass at the position of the liquid seal groove.

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