A desulfurization absorption tower washing water recovery device

Abstract

The utility model relates to the field of desulfurization absorption tower discloses a kind of desulfurization absorption tower flushing water recovery device, including deflector, the deflector is installed in the ridge demister module below;Flow guide pipe, the flow guide pipe includes branch pipe, and the branch pipe is connected with the mother pipe;Tower outer recovery module, the tower outer recovery module is set in main tower outside, for recycling the flushing water collected by the mother pipe;Not only effectively prevent the overflow of main tower, realize the closed loop recycling of flushing water, ensure the continuous and effective flushing of ridge demister module, avoid the scale and blockage problem, significantly prolong the service life of demister, improve the operation efficiency and water-saving benefit of desulfurization system as a whole.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization absorption towers, and in particular to a desulfurization absorption tower flushing water recovery device. Background Technology

[0002] Wet flue gas desulfurization (FGD) systems in coal-fired power plants are currently the mainstream desulfurization technology, accounting for over 90% of domestic desulfurization technologies. They offer advantages such as high desulfurization efficiency and low investment costs. However, their high water consumption makes them one of the main water-using systems in power plants, thus optimizing the water balance of the desulfurization system is crucial. The demister, as the core equipment of the wet FGD tower, is typically vertically arranged at the top of the absorber tower in the clean flue gas section. Its main function is to intercept slurry droplets and fine dust carried in the flue gas. Based on their structural form, demisters can be divided into three main categories: tubular, plate, and ridge-type. Among them, the ridge-type demister, due to its unique "A"-shaped structure design, has advantages such as uniform airflow distribution, low pressure drop, and high demisting efficiency (up to 99% or more). It can also simultaneously remove approximately 15%-20% of fine particulate matter, and is therefore widely used in new construction and renovation projects.

[0003] However, the current method of treating demister flushing water has significant technical flaws: the flushing wastewater is directly discharged into the absorber slurry pool, resulting in one-time consumption. This method not only wastes a large amount of process water but also causes a series of problems when the boiler is operating at low load. When the boiler is operating at low load, the flue gas flow rate and velocity decrease significantly, and the flue gas's ability to carry moisture weakens accordingly. If the normal flushing intensity is maintained at this time, it is very easy for the absorber liquid level to rise rapidly or even overflow; while if the flushing frequency or water volume is reduced, gypsum and other solids will gradually accumulate on the surface of the demister blades due to insufficient flushing, eventually forming hard scale. In severe cases, this can lead to blade deformation, breakage, or even complete collapse, which not only affects desulfurization efficiency but may also cause equipment failures such as induced draft fan vibration, threatening the safe and stable operation of the entire flue gas system. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is: in the existing wet desulfurization system, the flushing water of the demister is directly entered into the absorption tower and consumed once. When the boiler is running at low load, the flushing is reduced because the liquid level in the tower needs to be controlled, which leads to scaling and blockage of the demister and affects the safe operation of the system.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a desulfurization absorption tower flushing water recovery device, which includes,

[0006] A deflector plate, which is installed below the ridge demister module;

[0007] A flow guide pipe, the flow guide pipe including a branch pipe and a main pipe connected to the branch pipe;

[0008] An external recovery module is installed outside the main tower and is used to recover the flushing water collected by the main pipe.

[0009] Specifically, inside the main tower, when the ridge demister module is working, a water film forms on its surface and gradually flows into the guide plate. Under the action of the branch pipe, the flushing water inside the guide plate is guided and collected into the main pipe, and finally guided to the external recovery module through the main pipe. This design not only prevents overflow from the main tower, but also allows for efficient recovery and reuse of the flushing water, while ensuring that the ridge demister can still be flushed in a timely manner, avoiding scaling and increasing the service life of the ridge demister.

[0010] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: the ridge demister module is connected to a support plate, and the guide plate is installed on the inner side of the support plate.

[0011] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: the branch pipe and the main pipe are suspended below the ridge demister module by a snap fastener.

[0012] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: the branch pipe connects the guide plate and the main pipe, and the main pipe connects the branch pipe and the external recovery module; with this design, the flushing water flowing into the guide plate can be guided to the external recovery module, which can not only avoid the overflow of the main tower, but also effectively recover and reuse the flushing water.

[0013] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: under the dual-tower desulfurization process, the external recovery module includes a secondary external conveying pipe connected to the main pipe, and a primary desulfurization tower connected to the output end of the secondary external conveying pipe;

[0014] Specifically, the equipment is installed inside the secondary desulfurization tower. The flushing water collected through the main pipe flows to the external conveying pipe of the secondary tower and finally to the primary desulfurization tower. This allows for the recycling of the flushing water while ensuring that the ridge-type demister can still be flushed in a timely manner, preventing scaling and increasing the service life of the ridge-type demister.

[0015] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: under the single-tower desulfurization process, the external recovery module includes an external desulfurization tower conveying pipe connected to the main pipe, a collection water tank set at the output end of the external desulfurization tower conveying pipe, a water pump set at the output end of the collection water tank, and a limestone slurry preparation system connected to the output end of the water pump.

[0016] Specifically, the flushing water is installed inside the main tower. The flushing water collected through the main pipe flows to the external conveying pipe of the desulfurization tower. Then, the flushing water flows into the collection tank and is finally pumped to the limestone slurry system. This allows for the recycling of the flushing water while ensuring that the ridge-type demister can still be flushed in a timely manner, preventing scaling and increasing the service life of the ridge-type demister.

[0017] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: the guide plate is designed in a V shape to form two sets of guide channels, and the branch pipe is located at the intersection of the two sets of guide channels; the flushing water flowing down from the roof demister module can be guided into the inside of the branch pipe through the two sets of guide channels, so as to realize the recycling of the flushing water.

[0018] In a preferred embodiment of the desulfurization absorption tower flushing water recovery device of this utility model: the main pipe is arranged at an angle inside the main tower, and the angle of the main pipe is from the end away from the external recovery module as the high point, and gradually tilts downward towards the end closer to the external recovery module; due to the special angled arrangement of the main pipe, it can not only guide the flushing water flow in a directional manner, but also improve the flushing water recovery efficiency by increasing the water flow velocity.

[0019] The beneficial effects of this utility model are as follows: it not only effectively prevents the main tower from overflowing and realizes the closed-loop recycling of flushing water, but also ensures the continuous and effective flushing of the ridge demister module, avoids scaling and clogging problems, significantly extends the service life of the demister, and improves the overall operating efficiency and water-saving benefits of the desulfurization system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model, and are not intended to limit the utility model.

[0021] Figure 1 A schematic diagram of the dual-tower desulfurization process of this utility model is shown.

[0022] Figure 2 A schematic diagram of the single-tower desulfurization process of this utility model is shown.

[0023] Figure 3 A front view of the structure of this utility model is shown.

[0024] Figure 4 A side view of the structure of this utility model is shown. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0027] Reference Figures 1-4 This embodiment provides a desulfurization absorption tower flushing water recovery device, which includes,

[0028] Deflector plate 1 is installed below the ridge demister module 200;

[0029] The guide pipe 2 includes a branch pipe 21 and a main pipe 22 connected to the branch pipe 21;

[0030] External tower recovery module 3 is installed outside the main tower 100 and is used to recover the flushing water collected by the main pipe 22;

[0031] Specifically, inside the main tower 100, when the ridge demister module 200 is working, a water film forms on the surface of the ridge demister module 200 and gradually flows into the guide plate 1 along the ridge demister module 200. Under the action of the branch pipe 21, the flushing water inside the guide plate 1 is guided and collected into the main pipe 22, and finally guided to the external recovery module 3 through the main pipe 22. This design not only prevents the main tower 100 from overflowing, but also enables efficient recovery and reuse of the flushing water, while ensuring that the ridge demister can still be flushed in a timely manner, avoiding scaling and increasing the service life of the ridge demister.

[0032] The ridge demister module 200 is connected to a support plate 4, and the guide plate 1 is installed inside the support plate 4.

[0033] Branch pipe 21 and main pipe 22 are suspended below the ridge demister module 200 by clips.

[0034] Branch pipe 21 connects guide plate 1 and main pipe 22, and main pipe 22 connects branch pipe 21 and external recovery module 3. This design allows the flushing water flowing into guide plate 1 to be diverted to external recovery module 3, which can prevent the main tower 100 from overflowing and also effectively recover and reuse the flushing water.

[0035] As one embodiment provided, such as Figure 1 , Figure 3 , Figure 4 The external recovery module 3 includes a secondary external conveying pipe 31 connected to the main pipe 22, and a primary desulfurization tower 311 located at the output end of the secondary external conveying pipe 31.

[0036] Specifically, the equipment is installed inside the secondary desulfurization tower. The flushing water collected through the main pipe 22 flows to the external conveying pipe 31 of the secondary tower and finally flows to the primary desulfurization tower 311 through the external conveying pipe 31 of the secondary tower. This allows for the recycling of the flushing water while ensuring that the ridge-type demister can still be flushed in a timely manner, preventing scaling and increasing the service life of the ridge-type demister.

[0037] As one embodiment provided, such as Figure 2 ~ Figure 4 The external recovery module 3 includes an external conveying pipe 32 connected to the main pipe 22, a collection water tank 321 set at the output end of the external conveying pipe 32, a water pump 322 set at the output end of the collection water tank 321, and a limestone slurry preparation system 323 connected to the output end of the water pump 322.

[0038] Specifically, the flushing water is installed inside the single main tower 100. The flushing water collected through the main pipe 22 flows to the external conveying pipe 32 of the desulfurization tower. Then, the flushing water flows into the collection tank 321 and is finally transported to the limestone slurry system 323 by the water pump 322. This allows for the recycling of the flushing water while ensuring that the ridge-type demister can still be flushed in a timely manner, preventing scaling and increasing the service life of the ridge-type demister.

[0039] As one embodiment provided, such as Figures 1-4 The guide plate 1 is designed in a V shape to form two sets of guide channels, and the branch pipe 21 is located at the intersection of the two sets of guide channels. The flushing water flowing down from the roof demister module 200 can be guided into the branch pipe 21 through the two sets of guide channels to realize the recycling of flushing water.

[0040] As one embodiment provided, such as Figures 1-4The main pipe 22 is arranged at an angle inside the main tower 100, and the angle of the main pipe 22 is from the end away from the external recovery module 3 as the high point, and gradually tilts downward towards the end closer to the external recovery module 3. Due to the special angle arrangement of the main pipe 22, it can not only guide the flow of flushing water in a directional manner, but also improve the flushing water recovery efficiency by increasing the water flow velocity.

[0041] In summary, when the ridge demister module 200 is working, the water film formed on its surface flows along the module into the two sets of guide channels of the V-shaped guide plate 1. The flushing water is collected in the branch pipe 21 at the intersection of the guide channels. The branch pipe 21 guides the flushing water into the inclined main pipe 22. The main pipe 22 is inclined downward from the end away from the external recovery module 3 to the end closer to the external recovery module 3, using gravity to accelerate the water flow. In the dual-tower desulfurization process, the flushing water enters the first external conveying pipe 31 through the main pipe 22 and is then transported to the first-stage desulfurization tower 311. In the single-tower process, it enters the collection water tank 321 through the second external conveying pipe 32 and is then transported to the limestone slurry system 323 by the water pump 322. This design not only effectively prevents overflow from the main tower 100 and realizes closed-loop recycling of flushing water, but also ensures continuous and effective flushing of the ridge demister module 200, avoiding scaling and clogging problems, significantly extending the service life of the demister, and improving the overall operating efficiency and water-saving benefits of the desulfurization system.

[0042] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A desulfurization absorption tower flushing water recovery device, characterized in that: include, A deflector plate (1) is installed below the ridge demister module (200); The guide pipe (2) includes a branch pipe (21) and a main pipe (22) connected to the branch pipe (21); The external tower recovery module (3) is located outside the main tower (100) and is used to recover the flushing water collected by the mother pipe (22).

2. The desulfurization absorption tower flushing water recovery device according to claim 1, characterized in that: The ridge demister module (200) is connected to a support plate (4), and the guide plate (1) is installed inside the support plate (4).

3. The desulfurization absorption tower flushing water recovery device according to claim 2, characterized in that: The branch pipe (21) and the main pipe (22) are suspended below the ridge demister module (200) by snap fasteners.

4. The desulfurization absorption tower flushing water recovery device according to claim 3, characterized in that: The branch pipe (21) connects the guide plate (1) and the main pipe (22), and the main pipe (22) connects the branch pipe (21) and the external recovery module (3).

5. The desulfurization absorption tower flushing water recovery device according to claim 4, characterized in that: In the dual-tower desulfurization process, the external recovery module (3) includes a secondary external conveying pipe (31) connected to the main pipe (22) and a primary desulfurization tower (311) located at the output end of the secondary external conveying pipe (31).

6. The desulfurization absorption tower flushing water recovery device according to claim 4, characterized in that: In the single-tower desulfurization process, the external recovery module (3) includes an external desulfurization tower conveying pipe (32) connected to the main pipe (22), a collection water tank (321) set at the output end of the external desulfurization tower conveying pipe (32), a water pump (322) set at the output end of the collection water tank (321), and a limestone slurry preparation system (323) connected to the output end of the water pump (322).

7. The desulfurization absorption tower flushing water recovery device according to claim 5 or 6, characterized in that: The guide plate (1) is designed in a V shape to form two sets of guide channels, and the branch pipe (21) is located at the intersection of the two sets of guide channels.

8. The desulfurization absorption tower flushing water recovery device according to claim 7, characterized in that: The main pipe (22) is arranged at an angle inside the main tower (100), and the angle of the main pipe (22) is inclined from the end away from the external recovery module (3) to the end closer to the external recovery module (3).

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