A seawater desulfurization absorption tower

Abstract

This utility model discloses a seawater desulfurization absorption tower, comprising: an absorption tower body, an absorption tower packing layer, a seawater distribution device, a demister, a water supply pipe, a pressure stabilizing tank, an overflow pipe, a water supply branch pipe, and a water distribution branch pipe. The absorption tower body is sequentially equipped with a demister, a seawater distribution device, and an absorption tower packing layer. A flue gas outlet pipe is installed on the absorption tower body. A drain outlet is opened on the lower side wall of the absorption tower body. A flue gas inlet is opened on the side wall of the absorption tower body between the drain outlet and the absorption tower packing layer. The water supply pipe is connected to the seawater distribution device. The pressure stabilizing tank is installed at the upper end of the absorption tower body. The overflow pipe is connected at both ends to the pressure stabilizing tank and the absorption tower body, respectively. The seawater distribution device is a rectangular circular pipe, with both sides extending from both sides of the absorption tower body. The water supply pipe is connected to both sides of the seawater distribution device and both sides of the pressure stabilizing tank through water supply branch pipes. A water distribution branch pipe is installed inside the seawater distribution device within the absorption tower body. Nozzles are opened on the water distribution branch pipe and the rectangular circular pipe inside the absorption tower body. The flue gas outlet pipe extends outside the pressure stabilizing tank.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, specifically to a seawater desulfurization absorption tower. Background Technology

[0002] Seawater desulfurization technology utilizes the alkalinity of seawater to remove sulfur dioxide from flue gas, and the seawater desulfurization absorption tower is a crucial piece of equipment in the system. Industrial boilers using seawater for cooling can utilize their cooling wastewater as the water source for seawater desulfurization, requiring no additives.

[0003] Patent number CN1899676A, entitled "System for Desulfurization Treatment of Flue Gas Generated by Industrial Combustion Devices," describes a system that utilizes an absorption tower and aeration tank within the industrial combustion device. This system employs cooled seawater to contact the flue gas for acid-base neutralization and oxidation recovery, achieving low-cost, byproduct-free, and effective flue gas desulfurization. The seawater recovery system within the system utilizes an aeration tank and aeration blowers, among other equipment.

[0004] Patent number CN101143299A, entitled "Seawater Desulfurization System," provides a proposed seawater desulfurization system with corresponding adjustment capabilities for seawater distribution and aeration volume, thereby achieving better control of the desulfurization reaction and reducing power consumption. The system's seawater recovery system utilizes equipment such as an aeration tank and aeration blowers.

[0005] In a seawater desulfurization system, industrial flue gas containing sulfur dioxide flows through an absorption tower, where the sulfur dioxide is absorbed by the counter-flowing seawater, thus achieving flue gas desulfurization. The seawater distribution device in the absorption tower serves to evenly distribute the seawater on the upper part of the packing layer. In existing technologies, seawater distribution devices typically employ an overflow type with a water tank. To maintain uniform water flow distribution, the levelness of the overflow outlet is crucial, making actual installation difficult. Utility Model Content

[0006] The purpose of this invention is to provide a seawater desulfurization absorption tower that achieves the technical requirement of ultra-low emissions of sulfur dioxide removal from flue gas. The seawater distribution system of the absorption tower in this application adopts a pressure-stabilized ring network for water supply, with high-flow nozzles distributed throughout. A pressure-stabilizing water tank is installed at the top of the absorption tower to store seawater during operation, absorbing pressure fluctuations in the water supply pipeline and maintaining stable water pressure supplied by the seawater distribution device.

[0007] To achieve the purpose of this invention, the following technical solution is adopted in this application: This utility model discloses a seawater desulfurization absorption tower, comprising: an absorption tower body, an absorption tower packing layer, a seawater distribution device, a demister, and a water supply pipe. The absorption tower body is sequentially equipped with a demister, a seawater distribution device, and an absorption tower packing layer from top to bottom. A flue gas outlet pipe is installed at the upper end of the absorption tower body, and a drain outlet is opened on the side wall at the lower end of the absorption tower body. A flue gas inlet is opened on the side wall of the absorption tower body between the drain outlet and the absorption tower packing layer. The water supply pipe is connected to the seawater distribution device, which has several nozzles. The tower also includes: a pressure stabilizing water tank, an overflow pipe, a water supply branch pipe, and a water distribution branch pipe. A pressure-stabilizing water tank is installed at the top of the absorption tower. At least two overflow pipes are fixed at the top of the absorption tower, with both ends of the overflow pipes connected to the pressure-stabilizing water tank and the absorption tower, respectively. The seawater distribution device is a rectangular tube with its two sides extending from both sides of the absorption tower. The water supply pipe is connected to both sides of the seawater distribution device and the pressure-stabilizing water tank through two water supply branch pipes. Several water distribution branch pipes are installed inside the seawater distribution device of the absorption tower. Several nozzles are opened on the aforementioned water distribution branch pipes and the rectangular tube inside the absorption tower. The flue gas outlet pipe passes through the pressure-stabilizing water tank and extends outside the pressure-stabilizing water tank to communicate with the atmosphere.

[0008] The present invention relates to a seawater desulfurization absorption tower, wherein: several water distribution branch pipes are respectively installed between the rectangular circular pipes of the seawater distribution device inside the absorption tower and on both sides of the rectangular circular pipes.

[0009] The present invention relates to a seawater desulfurization absorption tower, wherein: it further includes a one-way valve, which is installed on the water supply pipe.

[0010] The present invention relates to a seawater desulfurization absorption tower, wherein: the rectangular circular tube of the seawater distribution device is connected to the water supply pipe through water supply branch pipes on both sides.

[0011] The present invention relates to a seawater desulfurization absorption tower, wherein: the water supply pipe is connected to one of the water supply branch pipes, and the other water supply branch pipe is connected to the water supply pipe through a connecting pipe.

[0012] The present invention relates to a seawater desulfurization absorption tower, wherein: an inlet connected to a water supply branch pipe is opened on each side of the pressure stabilizing water tank.

[0013] This utility model discloses a seawater desulfurization absorption tower, wherein the demister is a uniformly arranged blade-type demister, which is made of plastic, fiberglass or corrosion-resistant metal materials.

[0014] This utility model discloses a seawater desulfurization absorption tower, wherein: the absorption tower packing layer is filled with random or structured packing, which is made of plastic or corrosion-resistant metal; the specific surface area of ​​the packing is greater than 200 m². 2 / m 3 .

[0015] This utility model discloses a seawater desulfurization absorption tower, wherein: the seawater distribution device is equipped with several low-pressure nozzles, and the seawater distribution device, water supply pipe, water distribution branch pipe and water supply branch pipe are made of plastic or corrosion-resistant metal materials.

[0016] This utility model discloses a seawater desulfurization absorption tower, wherein the absorption tower body and the pressure stabilizing water tank are reinforced concrete structures or steel structures, and are lined with an anti-corrosion layer.

[0017] Compared with existing seawater desulfurization absorption towers, patent number CN1899676A, and patent number CN101143299A, the seawater desulfurization absorption tower of this utility model has the following advantages: 1. The annular water supply distribution device has better performance in uniformly distributing seawater.

[0018] 2. The pressure stabilizing tank can absorb pressure fluctuations in the water supply network and maintain a stable water supply flow from the seawater distribution device.

[0019] 3. The installation of a pressure-stabilizing water tank can ensure the stable operation of the absorption tower when the main water supply pipeline cannot supply water, and reserve time for emergency handling. Attached Figure Description

[0020] Figure 1 This is a front cross-sectional schematic diagram of a seawater desulfurization absorption tower according to the present invention; Figure 2 From Figure 1 A top-down view of the section cut at point AA.

[0021] exist Figure 1 and Figure 2 In the diagram, 1 is the absorption tower; 2 is the flue gas inlet; 3 is the drain outlet; 4 is the absorption tower packing layer; 5 is the seawater distribution device; 6 is the demister; 7 is the pressure stabilizing water tank; 8 is the overflow pipe; 9 is the flue gas outlet pipe; 10 is the connecting pipe; 11 is the water supply pipe; 12 is the one-way valve; 13 is the water supply branch pipe; 14 is the water distribution branch pipe; 15 is the nozzle; and 16 is the water inlet. Detailed Implementation

[0022] like Figure 1 and Figure 2As shown, the seawater desulfurization absorption tower of this utility model includes: an absorption tower body 1, an absorption tower packing layer 4, a seawater distribution device 5, a demister 6, a water supply pipe 11, a pressure stabilizing tank 7, an overflow pipe 8, a water supply branch pipe 13, and a water distribution branch pipe 14. The absorption tower body 1 is equipped with the demister 6, the seawater distribution device 5, and the absorption tower packing layer 4 sequentially from top to bottom. A flue gas outlet pipe 9 is installed at the upper end of the absorption tower body 1. A drain outlet 3 is opened on the side wall at the lower end of the absorption tower body 1. A flue gas inlet 2 is opened on the side wall of the absorption tower body 1 between the drain outlet 3 and the absorption tower packing layer 4. The water supply pipe 11 is connected to the seawater distribution device 5. The pressure stabilizing tank 7 is installed at the upper end of the absorption tower body 1. At least two overflow pipes 8 are fixed at the upper end of the absorption tower body 1, and both ends of the overflow pipes 8 are connected to the pressure stabilizing tank 7 and the absorption tower body 1, respectively. Figure 2 As shown in the top view, the seawater distribution device 5 is a rectangular tube. The two sides of the rectangular tube extend from the two sides of the absorption tower body 1. The water supply pipe 11 is connected to the two sides of the seawater distribution device 5 and the two sides of the pressure stabilizing water tank 7 through two water supply branch pipes 13. Several water distribution branch pipes 14 are installed between the rectangular tubes of the seawater distribution device 5 and on both sides of the rectangular tubes in the absorption tower body 1. Several nozzles 15 are opened on the above-mentioned water distribution branch pipes 14 and the rectangular tubes in the absorption tower body 1. The flue gas outlet pipe 9 passes through the pressure stabilizing water tank 7 and extends to the outside of the pressure stabilizing water tank 7 to communicate with the atmosphere.

[0023] like Figure 1 and Figure 2 As shown, the outer ends of the rectangular circular pipe of the seawater distribution device 5 are connected to the water supply pipe 11 via water supply branch pipes 13 on both sides. The water supply pipe 11 is connected to one of the water supply branch pipes 13, and the other water supply branch pipe 13 is connected to the water supply pipe 11 via a connecting pipe 10. An inlet 16 communicating with the water supply branch pipe 13 is opened on each side of the pressure stabilizing water tank 7. A one-way valve 12 is installed on the water supply pipe 11. The demister 6 is a uniformly arranged blade-type demister, which is made of plastic, fiberglass or corrosion-resistant metal materials.

[0024] The absorption tower packing layer 4 is filled with random or structured packing, made of plastic or corrosion-resistant metal; its specific surface area is greater than 200 m². 2 / m 3 .

[0025] The seawater distribution device 5 contains several low-pressure nozzles 15. The seawater distribution device 5, water supply pipe 11, water distribution branch pipe 14 and water supply branch pipe 13 are made of plastic or corrosion-resistant metal materials.

[0026] The absorption tower body 1 and the pressure stabilizing water tank 7 are reinforced concrete or steel structures with an anti-corrosion lining.

[0027] Seawater, pumped up, is supplied through a water supply pipe 11 equipped with a one-way valve 12. Near the absorption tower body 1, it splits into two supply branch pipes 13, with the seawater being transported from both sides of the absorption tower body to the rectangular seawater distribution device 5. Some of the seawater enters the pressure stabilizing water tank 7 through the supply branch pipes 13. After entering the rectangular seawater distribution device 5, the seawater flows downward into the absorption tower packing layer 4, absorbing sulfur dioxide from the flue gas entering the absorption tower body 1 through the flue gas inlet, thus completing the desulfurization process of the flue gas. The seawater that has absorbed sulfur dioxide falls to the bottom of the absorption tower body by gravity and is discharged from the absorption tower body 1 through the bottom drain outlet 3.

[0028] Under normal operating conditions, seawater enters the pressure-stabilizing water tank 7 at the top of the absorption tower 1 through the water supply branch pipe 13 and maintains a certain liquid level. When the water pressure in the water supply branch pipe 13 increases, seawater enters the pressure-stabilizing water tank 7, and the water level in the pressure-stabilizing water tank 7 rises, absorbing the impact of water pressure. When the water pressure in the water supply branch pipe 13 decreases and the water volume decreases, seawater flows into the rectangular seawater distribution device 5 through the water supply branch pipe 13, maintaining a stable water volume entering the rectangular seawater distribution device 5.

[0029] In the event of an accident, such as an emergency shutdown of the seawater supply pump to the absorption tower or a rupture of the main pipeline, when the water supply pipe 11 cannot supply water, the one-way valve 12 closes, the seawater in the water supply branch pipe 13 stops flowing, and the water in the pressure stabilizing tank 7 enters the seawater distribution device 5 through the water supply branch pipe 13, which can maintain the water supply for a certain period of time, allowing the absorption tower to operate normally and ensuring the continuous and stable operation of the main unit.

[0030] The absorption tower body 1 of this utility model is divided into two sections, which are welded to the upper and lower ends of the seawater distribution device 5, respectively.

[0031] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar methods and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of this patent.

Claims

1. A seawater desulfurization absorption tower, comprising: The absorption tower body (1), absorption tower packing layer (4), seawater distribution device (5), demister (6) and water supply pipe (11) are installed in the absorption tower body (1) from top to bottom. A flue gas outlet pipe (9) is installed at the upper end of the absorption tower body (1). A drain outlet (3) is opened on the side wall at the lower end of the absorption tower body (1). A flue gas inlet (2) is opened on the side wall of the absorption tower body (1) between the drain outlet (3) and the absorption tower packing layer (4). The water supply pipe (11) is connected to the seawater distribution device (5). Several nozzles (15) are opened on the seawater distribution device (5). The characteristic feature is that it also includes: a pressure stabilizing water tank (7), an overflow pipe (8), a water supply branch pipe (13) and a water distribution branch pipe (14). The box (7) is installed at the upper end of the absorption tower body (1), and at least two overflow pipes (8) are fixed at the upper end of the absorption tower body (1). The two ends of the overflow pipes (8) are connected to the pressure stabilizing water tank (7) and the absorption tower body (1) respectively. The seawater distribution device (5) is a rectangular round pipe. The two sides of the rectangular round pipe extend from the two sides of the absorption tower body (1). The water supply pipe (11) is connected to the two sides of the seawater distribution device (5) and the two sides of the pressure stabilizing water tank (7) through two water supply branch pipes (13). Several water distribution branch pipes (14) are installed in the seawater distribution device (5) of the absorption tower body (1). Several nozzles (15) are opened on the above-mentioned water distribution branch pipes (14) and the rectangular round pipe in the absorption tower body (1). The flue gas outlet pipe (9) passes through the pressure stabilizing water tank (7) and extends to the outside of the pressure stabilizing water tank (7) to communicate with the atmosphere.

2. The seawater desulfurization absorption tower as described in claim 1, characterized in that: Several water distribution branch pipes (14) are installed between the rectangular tubes of the seawater distribution device (5) inside the absorption tower (1) and on both sides of the rectangular tubes.

3. The seawater desulfurization absorption tower as described in claim 2, characterized in that: It also includes a one-way valve (12) which is mounted on the water supply pipe (11).

4. The seawater desulfurization absorption tower as described in claim 3, characterized in that: The rectangular tube of the seawater distribution device (5) is connected to the water supply pipe (11) on both sides of its outer end via water supply branch pipes (13).

5. A seawater desulfurization absorption tower as described in claim 4, characterized in that: The water supply pipe (11) is connected to one of the water supply branch pipes (13), and the other water supply branch pipe (13) is connected to the water supply pipe (11) through a connecting pipe (10).

6. A seawater desulfurization absorption tower as described in claim 5, characterized in that: On both sides of the pressure-stabilizing water tank (7), there is an inlet (16) that is connected to the water supply branch pipe (13).

7. A seawater desulfurization absorption tower as described in claim 6, characterized in that: The demister (6) is a uniformly arranged blade demister, which is made of plastic, fiberglass or corrosion-resistant metal materials.

8. A seawater desulfurization absorption tower as described in claim 6, characterized in that: The absorber packing layer (4) is filled with random or structured packing, which is made of plastic or corrosion-resistant metal; the specific surface area of ​​the packing is greater than 200 m². 2 / m 3 .

9. A seawater desulfurization absorption tower as described in claim 6, characterized in that: The seawater distribution device (5) contains several low-pressure nozzles (15). The seawater distribution device (5), water supply pipe (11), water distribution branch pipe (14) and water supply branch pipe (13) are made of plastic or corrosion-resistant metal materials.

10. A seawater desulfurization absorption tower as described in claim 6, characterized in that: The absorption tower (1) and the pressure stabilizing water tank (7) are reinforced concrete or steel structures with an anti-corrosion lining.

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