Marine multi-bed organic amine trapping system

Abstract

The utility model provides a marine multi-bed organic amine trapping system which comprises at least two absorption towers which are connected in series and numbered as 1, 2... n + 1, n is greater than or equal to 1, absorbents are filled in the absorption towers, the absorbents are organic amine solution and rich liquor or semi-rich liquor at the bottoms of the absorption towers from the first to the n, and the organic amine solution and the rich liquor or the semi-rich liquor enter the next absorption tower for the next absorption process after being cooled by a cooler. Rich liquid at the bottom of the n + 1 absorption tower enters a desorption tower through a lean-rich heat exchanger for desorption, and the heights of the absorption tower and the desorption tower are 10-20 m. According to the utility model, multi-tower absorption is adopted, the CO2 loading capacity of an organic amine solution absorbent is fully utilized, the capture efficiency of carbon dioxide is improved, the arrangement height of the tower on a ship is directly reduced, the height of a filler layer of the absorption tower is effectively reduced, the design height is further optimized and reduced, and the arrangement difficulty of tower equipment on the ship is reduced; the device occupies a small area on a ship and is suitable for a ship environment with a limited space.

Description

Technical Field

[0001] The utility model belongs to the technical field of marine environmental protection and relates to a marine multi-bed organic amine capture system. Background Art

[0002] With the increasing attention paid to environmental protection around the world, pollutants such as carbon dioxide emitted by ships are also strictly controlled. In this context, organic amine capture systems are widely used in the field of ships as an effective carbon dioxide emission reduction technology. Organic amine capture systems mainly use absorption towers and desorption towers to capture and release carbon dioxide. The organic amine solution in the absorption tower can effectively absorb carbon dioxide, while the desorption tower is responsible for desorbing the organic amine solution that has absorbed carbon dioxide, thereby achieving the separation and recovery of carbon dioxide. Single-tower absorption and single-tower desorption are usually used to capture and release carbon dioxide. Although this method is simple and easy to implement, its efficiency is relatively low and requires a high packing layer height and energy consumption. Utility Model Content

[0003] In order to solve the above technical problems, a marine multi-bed organic amine capture system comprises at least two absorption towers connected in series, numbered 1, 2...n+1, n≥1, the absorption tower is filled with an absorbent, the absorbent is an organic amine solution, and the CO2 loading capacity of the organic amine solution is used to capture CO2, the rich liquid or semi-rich liquid at the bottom of the absorption towers 1 to n is cooled by a cooler and then enters the next absorption tower for the next absorption process, the rich liquid at the bottom of the n+1 absorption tower enters the analysis tower for analysis through a lean-rich heat exchanger, and the height of the absorption tower and the desorption tower is 10-20m.

[0004] It also includes returning the rich liquid or semi-rich liquid cooled by the cooler to the absorption tower for absorption. After being cooled by the cooler, the absorbent returns to the absorption tower, which is beneficial to promoting the forward process of absorption and improving the absorption efficiency.

[0005] The analysis tower is at least two desorption towers connected in series, and the semi-lean liquid and the lean liquid obtained by analysis enter the absorption tower through the lean-rich heat exchanger.

[0006] The ship's engine flue gas is discharged from the outlet of the absorption tower after the organic amine solution in the absorption tower captures CO2.

[0007] The absorption tower and the desorption tower are both arranged on the deck of the ship or inside the hull, and the distance between the towers is 5-15m.

[0008] The analytical tower is connected in series for heat exchange via low-pressure steam.

[0009] Compared with the existing technology, the beneficial effects of this technical solution are as follows:

[0010] 1. Use multi-tower absorption to fully utilize the CO2 loading capacity of the organic amine solution absorbent and improve the capture efficiency of carbon dioxide. This not only directly reduces the layout height of the tower on the ship, but also effectively reduces the height of the packing layer of the absorption tower, further optimizes and reduces the design height, and reduces the difficulty of arranging the tower equipment on the ship.

[0011] 2. By setting up a double-tower desorption system, the release efficiency of carbon dioxide can be improved and energy consumption can be reduced.

[0012] 3. Simplify the pipelines of multi-tower absorption and multi-tower desorption systems to reduce equipment costs and maintenance difficulties.

[0013] 4. The utility model occupies a small area on the ship and is suitable for ship environments with limited space.

[0014] 5. Compared with the prior art, the utility model has significant improvements in reducing the height of the packing layer of the absorption tower, thereby improving the overall efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a marine multi-bed organic amine capture system;

[0016] Among them, 1 is absorption tower No. 1, 2 is absorption tower No. 2, 3 is analysis tower No. 1, 4 is analysis tower No. 2, 5 is cooler, and 6 is rich-poor heat exchanger. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 1 As shown, a marine multi-bed organic amine capture system includes double absorption towers, absorption tower 1 No. 1 and absorption tower 2 No. 2, wherein the absorption towers are filled with absorbent, which is an organic amine solution, and CO2 is captured by utilizing the CO2 loading capacity of the organic amine solution absorbent, and a portion of the semi-rich liquid at the bottom of absorption tower 1 No. 1 is cooled by heat exchanger cooler 4, and a portion of it returns to the upper part of absorption tower 1 for absorption again, and a portion of it enters the upper part of absorption tower 2 No. 2 for the next absorption process; the system also includes double desorption towers connected in series, desorption tower 1 No. 3 and desorption tower 2 No. 4, and the rich liquid at the bottom of absorption tower 2 enters desorption tower 1 No. 3 and desorption tower 2 No. 4 in turn through a lean-rich heat exchanger 5 for desorption; the semi-lean liquid and lean liquid obtained by desorption tower 1 No. 3 and desorption tower 2 No. 4 enter absorption tower 2 No. 2 and absorption tower 1 No. 1 respectively through a lean-rich heat exchanger 5.

[0019] The ship's engine flue gas enters absorption tower 1 and absorption tower 2 from the lower parts of absorption tower 1 and absorption tower 2 respectively, and is discharged from the top outlets of absorption tower 1 and absorption tower 2 after CO2 is captured by organic amine solution in the absorption tower.

[0020] The absorption tower No. 1 and absorption tower No. 2 have a diameter of 5 meters, a height of 20 meters, and are made of stainless steel; the operating pressure of absorption tower 1 and absorption tower 2 is 1.0MPa, the operating temperature is 30°C, and the flow rate of organic amine solution absorbent is 10 cubic meters / hour (entering from the upper part of absorption tower No. 1); the filler in the absorption tower is a high-efficiency regular filler, the filler layer height is 5 meters, the filler material is polypropylene, the pore size is 5 mm, and the specific surface area is 150 square meters / cubic meter; the diameter of analysis tower No. 1 and analysis tower No. 2 is 3 meters, the height is 15 meters, and the material is stainless steel; the operating pressure of desorption tower 1 and desorption tower 2 is 0.8MPa, and the operating temperature is 90-120°C.

[0021] The analysis tower performs analysis by serial heat exchange with low-pressure steam, which enters from the No. 2 analysis tower 4, thereby optimizing energy utilization and reducing energy consumption.

[0022] Both the absorption tower and the desorption tower are arranged on the deck of the ship with a distance of 10 meters between them for easy operation and maintenance.

Claims

1. A marine multi-bed organic amine capture system, characterized in that: The invention comprises at least two absorption towers connected in series, which are numbered 1, 2...n+1, where n≥1. The absorption towers are filled with an absorbent, which is an organic amine solution. The CO2 loading capacity of the organic amine solution is used to capture CO2. The rich liquid or semi-rich liquid at the bottom of the absorption towers 1 to n is cooled by a cooler (5) and then enters the next absorption tower for the next absorption process. The rich liquid at the bottom of the n+1 absorption tower enters the analysis tower for analysis through a rich-poor heat exchanger (6). The height of the absorption tower and the desorption tower is 10-20m.

2. A marine multi-bed organic amine capture system as claimed in claim 1, characterized in that: It also includes returning the rich liquid or semi-rich liquid cooled by the cooler (5) to the absorption tower for absorption.

3. A marine multi-bed organic amine capture system as claimed in claim 1, characterized in that: The analysis tower is at least two desorption towers connected in series, and the lean liquid and semi-lean liquid obtained by analysis enter the absorption tower through the lean-rich heat exchanger (6).

4. A marine multi-bed organic amine capture system as claimed in claim 1, characterized in that: The flue gas from the ship-burning engine is discharged from the outlet of the absorption tower after the organic amine solution in the absorption tower captures CO2.

5. The marine multi-bed organic amine capture system according to claim 1, characterized in that: The absorption tower and the desorption tower are both arranged on the deck of the ship or inside the hull, and the distance between the towers is 5-15m.

6. A marine multi-bed organic amine capture system as claimed in claim 1, characterized in that: The analytical tower is connected in series for heat exchange via low-pressure steam.

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