Flue gas desulfurization absorption tower disturbing device

Abstract

The utility model discloses a flue gas desulfurization absorption tower disturbance device, including the absorption tower, the absorption tower is provided with the circulating pipe, is provided with circulating pump on the circulating pipe, the bottom of absorption tower is provided with at least one disturbance pipe, flue gas desulfurization absorption tower disturbance device still includes disturbance inlet pipe, and each disturbance pipe is communicated with disturbance inlet pipe respectively, and is provided with first valve on each disturbance pipe respectively. The utility model provides technical scheme through adding disturbance inlet pipe, can adopt the treated boiler turbine cooling water as the disturbance medium, replaces the traditional circulating slurry containing solid particles, avoids the wear and tear of solid particles to the disturbance pipe, reduces the dependence on fresh industrial water, realizes water resource recycling.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to a disturbance device for a flue gas desulfurization absorption tower. Background Technology

[0002] In the field of flue gas desulfurization technology, the absorption tower is the core device for removing pollutants such as sulfur dioxide from flue gas. During the operation of the absorption tower, if the slurry at the bottom of the tower is in a relatively static or insufficiently flowing state for a long time, sedimentation and scaling are likely to occur. This will not only reduce the effective volume of the absorption tower, but also affect the desulfurization reaction efficiency. Therefore, in the existing technology, a disturbance pipe is usually installed at the bottom of the absorption tower, and the circulation pipe of the absorption tower is bypassed to the disturbance pipe. This allows a portion of the circulating slurry in the absorption tower to be transported to the disturbance pipe (the other portion of the circulating slurry is used for normal circulation), and then the disturbance pipe sends the slurry back to the bottom of the tower, thereby achieving disturbance at the bottom of the tower through the flow of the slurry. However, this scheme has the following shortcomings: (1) The circulating slurry usually contains a large number of solid particles, which will cause wear to the disturbance pipe. In severe cases, it will cause leakage of the disturbance pipe, increasing the maintenance workload; (2) The circulating slurry used for disturbance will occupy part of the slurry that should participate in the desulfurization reaction, reducing the reactivity and absorption of the slurry and flue gas, which in turn leads to an increase in the consumption of desulfurization agents and increases the operating cost.

[0003] In view of the above technical problems, this utility model proposes a new technical solution. By setting up a disturbance inlet pipe, the factory's recycled water (e.g., boiler coolant after sewage cooling treatment) can be sent to the disturbance inlet pipe in actual application, thereby disturbing the bottom of the absorption tower. This avoids disturbing the bottom of the tower with circulating slurry, prevents wear on the disturbance pipe, and allows all the circulating slurry to be used for circulation. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a disturbance device for flue gas desulfurization absorption tower, which aims to solve the technical problem of using circulating slurry to disturb the bottom of the tower in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A disturbance device for a flue gas desulfurization absorption tower includes an absorption tower with a circulation pipe and a circulation pump installed on the circulation pipe; at least one disturbance pipe is installed at the bottom of the absorption tower; the disturbance device for the flue gas desulfurization absorption tower also includes a disturbance inlet pipe, each disturbance pipe is connected to the disturbance inlet pipe, and each disturbance pipe is equipped with a first valve.

[0006] Furthermore, in the flue gas desulfurization absorption tower disturbance device, three disturbance pipes are installed at the bottom of the absorption tower, and the three disturbance pipes extend into the absorption tower to different lengths.

[0007] Furthermore, in the flue gas desulfurization absorption tower disturbance device, the three disturbance pipes are arranged from top to bottom, with the uppermost disturbance pipe having the shortest length extending into the absorption tower and the lowermost disturbance pipe having the longest length extending into the absorption tower.

[0008] Furthermore, in the flue gas desulfurization absorption tower disturbance device, each disturbance pipe is connected to the circulation pipe through a bypass pipe; each bypass pipe is equipped with a bypass valve.

[0009] Furthermore, in the flue gas desulfurization absorption tower disturbance device, two water inlet branches are provided upstream of the disturbance water inlet pipe, and each water inlet branch is equipped with a water pump and a second valve.

[0010] Furthermore, in the flue gas desulfurization absorption tower disturbance device, the absorption tower is equipped with a water supply pipe, and the disturbance water inlet pipe is connected to the water supply pipe through an extension pipe, on which a third valve is installed.

[0011] Furthermore, in the flue gas desulfurization absorption tower disturbance device, a liquid level sensor is installed inside the absorption tower.

[0012] Furthermore, in the flue gas desulfurization absorption tower disturbance device, a flow sensor is installed on the circulation pipe.

[0013] Beneficial effects: This utility model provides a disturbance device for a flue gas desulfurization absorption tower, which has at least the following advantages compared with the prior art: (1) Solve the problem of wear of disturbance pipe: By adding a disturbance inlet pipe, the treated boiler turner cooling water can be used as the disturbance medium to replace the traditional circulating slurry containing solid particles, avoid wear of the disturbance pipe by solid particles, reduce leakage failure of the disturbance pipe, reduce the frequency of equipment maintenance and workload, and extend the service life of the disturbance pipe.

[0014] (2) Realize water resource recycling: Use the treated boiler cooling water as the main source of disturbance water to reduce dependence on fresh industrial water and realize water resource recycling.

[0015] (3) Optimize the disturbance effect: Furthermore, three disturbance pipes with different lengths are installed at the bottom of the absorption tower and arranged from top to bottom with "shorter at the top and longer at the bottom". This can form a three-dimensional disturbance from different radial positions and heights at the bottom of the tower, covering a wider area at the bottom of the tower, effectively avoiding local slurry stagnation, preventing solid particles from settling and scaling at the bottom of the tower, and ensuring the effective volume of the absorption tower and the stable operation of the system.

[0016] (4) Enhance the stability of the device operation: Furthermore, each disturbance pipe is connected to the circulation pipe through a bypass pipe to form a "circulating slurry disturbance" backup mode, which can be switched in case of water source failure of the disturbance inlet pipe to avoid system shutdown; in addition, two inlet branch pipes are set upstream of the disturbance inlet pipe and connected to the water supply pipe to realize multiple water source interconnection backup, and at the same time, the liquid level of the absorption tower can be flexibly replenished to further improve the reliability of the system operation. Attached Figure Description

[0017] Figure 1 This is a front view of the disturbance device for the flue gas desulfurization absorption tower provided by this utility model.

[0018] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0019] Explanation of reference numerals in the attached figures: 1. Absorption tower; 2. Circulation pipe; 20. Circulation pump; 31, 32, 33, Disturbance tubes; 4. Disturbance to the inlet pipe; 41. Extension pipe; 5. Inlet branch pipe; 50. Water pump; 6. Bypass pipe; 61. Bypass valve; 7. Water supply pipe; 81. First valve; 82. Second valve; 83. Third valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0021] Please see Figure 1 This utility model provides a disturbance device for a flue gas desulfurization absorption tower. The accompanying drawings are for illustrative purposes only and are not proportional to the actual product. The drawings focus on the innovative aspects of this invention; some conventional structures are not specifically depicted. In the field of flue gas desulfurization, the absorption tower itself is existing technology; therefore, the accompanying drawings do not specifically depict the conventional structure of the absorption tower (e.g., liquid phase inlet pipe, liquid phase outlet pipe, flue gas inlet pipe, flue gas outlet pipe, and the internal structure of the absorption tower, etc.).

[0022] The terms "first," "second," and the names of various pipes, valves, and other structures used in this document are merely different names for similar structures to facilitate differentiation and explanation, and are not intended to limit this application.

[0023] The term "connection" refers to the fluid conduction connection between pipelines, which can be achieved using conventional pipeline connection methods in this field, such as flange connection, welding, or threaded connection.

[0024] The flue gas desulfurization absorption tower disturbance device includes an absorption tower 1, which is equipped with a circulation pipe 2, and a circulation pump 20 is installed on the circulation pipe. At least one disturbance pipe is installed at the bottom of the absorption tower (three disturbance pipes, 31, 32 and 33, are shown in the figure). The flue gas desulfurization absorption tower disturbance device also includes a disturbance inlet pipe 4, and each disturbance pipe is connected to the disturbance inlet pipe. Each disturbance pipe is equipped with a first valve 81.

[0025] The aforementioned circulating pump provides power to the circulating slurry, ensuring that the slurry is delivered to the tower for spraying at sufficient pressure, thus achieving full spraying and absorption of the flue gas inside the tower. Under the action of the circulating pump, a circulation loop of "slurry at the bottom of the tower → circulating pipe → spraying inside the tower → return to the bottom of the tower" can be formed. The aforementioned agitation pipe is preferably made of 316L stainless steel, which has good corrosion resistance and avoids the problem of easy rusting of conventional carbon steel. The agitation inlet pipe can be connected to the boiler rotor cooling water that has undergone blowdown cooling treatment. The "boiler rotor cooling water" refers to the circulating or flowing cooling water used to cool the key components of the boiler's auxiliary rotating mechanical equipment (hereinafter referred to as "rotor"). Since the boiler rotor cooling water that has undergone blowdown cooling treatment can be used for tower bottom agitation in actual application, the use of circulating slurry entering the agitation pipe is avoided, preventing wear on the agitation pipe, and all circulating slurry can be used for circulation.

[0026] Furthermore, the bottom of the absorption tower is equipped with three disturbance tubes (31, 32, and 33), each extending into the tower to a different length. This design allows the disturbance medium to be sprayed from different positions at the bottom of the tower, covering a wider disturbance area and avoiding the problem of insufficient disturbance in a single location.

[0027] Furthermore, the three agitation tubes (31, 32, and 33) are arranged from top to bottom, with the uppermost agitation tube 31 having the shortest length extending into the absorption tower, and the lowermost agitation tube 33 having the longest length extending into the absorption tower. This arrangement creates a three-dimensional flow of the agitation medium, which can both stir the upper layer of slurry at the bottom of the tower and act on the lower layer of slurry that is prone to sedimentation (solid particles tend to accumulate at the bottom of the tower), further enhancing the agitation effect.

[0028] Furthermore, each disturbance pipe is connected to the circulation pipe 2 via a bypass pipe 6; each bypass pipe is equipped with a bypass valve 61 to control the opening and closing of the bypass pipe. The significance of this setting is that when the water source of the disturbance inlet pipe 5 (such as boiler turner cooling water) fails, the bypass valve can be opened and the first valve closed, switching to the traditional circulating slurry disturbance mode, preventing the absorption tower from shutting down due to lack of disturbance, and improving the system's operational stability.

[0029] Furthermore, two inlet branch pipes 5 are installed upstream of the disturbance inlet pipe 4, each equipped with a water pump 50 and a second valve 82. By installing two inlet branch pipes, different water sources can be connected, further improving the efficiency of water resource recycling.

[0030] Furthermore, the absorption tower is equipped with a water supply pipe 7, and the disturbance inlet pipe 4 is connected to the water supply pipe via an extension pipe 41, on which a third valve 83 is installed. The inlet end of the aforementioned water supply pipe is connected to the factory's industrial water system, and the other end is connected to the middle of the absorption tower, used to replenish the absorption tower with water lost due to evaporation and slurry discharge. When the water supply pipe malfunctions, the third valve can be opened to supply water to the absorption tower through the disturbance inlet pipe. In addition, when the disturbance inlet pipe needs maintenance, water can also be temporarily supplied to the disturbance pipe through the water supply pipe, further enhancing the system's versatility and fault tolerance.

[0031] Furthermore, a liquid level sensor (not shown in the figure) is installed inside the absorption tower to monitor the liquid level of the slurry inside the tower in real time.

[0032] Furthermore, a flow sensor (not shown in the figure) is installed on the circulation pipe to monitor the flow rate of the slurry in the circulation pipe in real time.

[0033] To facilitate understanding, the working principle is briefly described below.

[0034] Normal operating mode: Close the bypass valve, open the second valve of one of the inlet branch pipes and all the first valves, start the corresponding water pump, and the boiler turntable cooling water is distributed to the three disturbance pipes through the recovery water inlet branch pipe and the disturbance inlet pipe, and sprayed out from different positions at the bottom of the tower to form a three-dimensional disturbance; at the same time, the circulation pump starts, and the circulating slurry is transported to the spray layer to participate in the desulfurization reaction. The liquid level sensor and the flow sensor monitor the liquid level in the absorption tower and the flow rate of the circulating slurry in real time.

[0035] Emergency Operation Mode (Circulating Slurry Disturbance): When both inlet branch pipes fail, the water pump is stopped, all first valves are closed, and the bypass valve is opened. Some of the slurry in the circulating pipe flows into the disturbance pipe through the bypass pipe to achieve emergency disturbance. After the water source failure is eliminated, the system is switched back to normal mode.

[0036] It should be noted that water is consumed during the operation of the flue gas desulfurization absorption tower (e.g., water is carried away by flue gas evaporation and water is carried away by desulfurization product slurry). The cooling water (boiler turbine cooling water or industrial water) introduced through the agitator pipe does not add water to the tower indefinitely; it actually serves as a water replenishment function. That is, in actual operation, the amount of water introduced into the absorption tower will maintain a dynamic balance with the water consumed, and will not lead to the unlimited and continuous accumulation of water inside the tower.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A disturbance device for a flue gas desulfurization absorption tower, comprising an absorption tower, wherein the absorption tower is provided with a circulation pipe and a circulation pump is provided on the circulation pipe; at least one disturbance pipe is provided at the bottom of the absorption tower, characterized in that: The flue gas desulfurization absorption tower disturbance device also includes a disturbance inlet pipe, each disturbance pipe is connected to the disturbance inlet pipe, and each disturbance pipe is equipped with a first valve.

2. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: The bottom of the absorption tower is equipped with three disturbance tubes, each extending into the tower to a different length.

3. The disturbance device for the flue gas desulfurization absorption tower according to claim 2, characterized in that: The three disturbance tubes are arranged from top to bottom. The disturbance tube at the top has the shortest length extending into the absorption tower, while the disturbance tube at the bottom has the longest length extending into the absorption tower.

4. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: Each disturbance pipe is connected to the circulation pipe via a bypass pipe; each bypass pipe is equipped with a bypass valve.

5. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: Two inlet branch pipes are installed upstream of the disturbance inlet pipe, and each inlet branch pipe is equipped with a water pump and a second valve.

6. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: The absorption tower is equipped with a water supply pipe, and the disturbance inlet pipe is connected to the water supply pipe through an extension pipe, which is equipped with a third valve.

7. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: A liquid level sensor is installed inside the absorption tower.

8. The disturbance device for the flue gas desulfurization absorption tower according to claim 1, characterized in that: A flow sensor is installed on the circulation pipe.

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