Rapid dredging system for desulfurizing absorption tower of thermal power plant

Abstract

The utility model relates to the technical field of desulfurizing absorption tower equipment, and discloses a quick dredging system for a desulfurizing absorption tower of a thermal power plant, which comprises an absorption tower mechanism, the absorption tower mechanism comprises a base and an absorption tower shell mounted at the upper end of the base, and a discharge pipe is arranged at the bottom of the absorption tower shell; a first desilting mechanism and a second desilting mechanism are arranged in the absorption tower mechanism, the first desilting mechanism comprises a first annular pipeline and a bent pipe installed at the lower end of the first annular pipeline in a communicating mode, a three-way pipe is installed at one end of the bent pipe in a communicating mode, and a connecting valve is installed at one end of the three-way pipe in a communicating mode; under the cooperation of the first desilting mechanism and the second desilting mechanism, the first desilting mechanism and the second desilting mechanism can jointly desilt the bottom of the absorption tower shell by utilizing disturbance of accessed process water and compressed air, and the defect that the disturbance range of a stirrer of the absorption tower mechanism is insufficient can be overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of desulfurization absorption tower equipment, specifically a rapid sludge removal system for desulfurization absorption towers in thermal power plants. Background Technology

[0002] The desulfurization absorption tower is a crucial system for the environmental protection operation of thermal power plants, serving as the primary area for flue gas desulfurization reactions. All flue gas from the induced draft fan is cooled by the low-temperature flue gas treatment system (MGGH) before entering the absorption tower. Within the absorption zone, SO2 in the flue gas is absorbed by the atomized absorbent slurry, generating CaSO3. This CaSO3 is then oxidized by oxidizing air blown into the slurry pool, generating CaSO4, which then crystallizes with gypsum seed crystals to form gypsum. The desulfurized flue gas (clean flue gas) passes through a demister to remove any remaining droplets before being heated to 80°C by the MGGH and discharged into the chimney. The stable operation of the desulfurization absorption tower ensures the stability and high efficiency of the desulfurization environmental protection process.

[0003] As the reaction zone for desulfurization, the absorption tower contains gypsum and other substances in its slurry. When the agitator of the absorption tower malfunctions or the gypsum dewatering system malfunctions, gypsum sludge may accumulate inside the absorption tower, which can adversely affect the operation of the absorption tower or shutdown maintenance. When the tower is shut down for maintenance, the gypsum sludge deposits and clumps together, requiring a large amount of manual cleaning, which prolongs the maintenance time, hinders the progress of maintenance, and also has an adverse impact on the safety of the cleaning personnel.

[0004] Traditional power plant desulfurization absorption towers typically have agitators installed in the lower part of the tower. However, in absorption towers with diameters of 10 meters or even 20 meters, only a few agitators are usually installed. The agitators have a small range of movement and cannot guarantee the suspension of the slurry inside the absorption tower, thus limiting their use.

[0005] Therefore, we propose a rapid sludge removal system for desulfurization absorption towers in thermal power plants to address the aforementioned problems. Summary of the Invention

[0006] The purpose of this utility model is to provide a rapid sludge removal system for desulfurization absorption towers in thermal power plants. The system consists of a sludge removal and flushing system with a DN50 valve, pipe, and nozzle at the bottom of the absorption tower. By utilizing the disturbance caused by the access of process water and compressed air, the system enhances the flushing of gypsum sludge deposited inside the absorption tower, achieving a rapid sludge removal effect and solving the problem of insufficient disturbance range of the absorber agitator in the aforementioned background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rapid sludge removal system for desulfurization absorption towers in thermal power plants, comprising an absorption tower mechanism, wherein the absorption tower mechanism includes a base and an absorption tower shell installed on the upper end of the base, and a discharge pipe is provided at the bottom of the absorption tower shell;

[0008] The absorption tower mechanism is internally equipped with a first sludge removal mechanism and a second sludge removal mechanism. The first sludge removal mechanism includes a first annular pipe and a bend pipe connected to the lower end of the first annular pipe. One end of the bend pipe is connected to a tee pipe, and one end of the tee pipe is connected to a connecting valve.

[0009] The first annular pipe is provided with a plurality of equally spaced air outlet nozzles, wherein two air outlet nozzles form a group and are respectively located on both sides of the lower end of the first annular pipe.

[0010] Preferably, the bend is connected to the bottom of the absorption tower shell, and the connecting valve is connected to the base.

[0011] Preferably, a corrugated pipe is installed between the first annular pipe and the bend.

[0012] Preferably, the second dredging mechanism includes a second annular pipe, on which water nozzles are evenly distributed.

[0013] Preferably, both the first annular pipe and the second annular pipe are spirally distributed, and an end nozzle is provided at the end of the first annular pipe away from the corrugated pipe.

[0014] Preferably, the second dredging mechanism has the same structure as the first dredging mechanism, and the second dredging mechanism and the first dredging mechanism are arranged opposite each other on both sides inside the absorption tower shell.

[0015] Preferably, the absorption tower mechanism is further equipped with two stabilizing mechanisms. The stabilizing mechanism includes a stabilizing block fixedly installed on the inner wall of the absorption tower shell and a retainer fixedly installed on the inner wall of the stabilizing block. The two retainers are slidably connected to the first annular pipe and the second annular pipe, respectively.

[0016] Preferably, a universal ball is rotatably mounted on the inner wall of the retainer, and the universal ball is rotatably disposed on the outer periphery of the first annular pipe and the second annular pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. When gypsum and other materials accumulate inside the absorption tower, the external disturbance water and air main valves are opened. External water and air are used to flush the deposits through pipes and nozzles, achieving the purpose of dilution and flow, so that the slurry is suspended and discharged through the absorption tower discharge pipe. With the cooperation of the first and second sludge cleaning mechanisms, this device utilizes the disturbance of process water and compressed air to clean the bottom of the absorption tower shell together, which can make up for the deficiency of insufficient disturbance range of the agitator in the absorption tower mechanism.

[0019] 2. During the air jetting process, half of the spray range of the exhaust nozzle is located on the second annular pipe. Therefore, the exhaust nozzle can not only disturb the inside of the absorption tower shell, but also clean the residue on the second annular pipe for subsequent cleaning.

[0020] 3. Both the first and second annular pipes are spirally distributed, and the adjacent air and water nozzles are set at different heights, which increases the vertical cleaning range of the device. The first and second annular pipes are vertically alternating, ensuring that the first and second annular pipes do not interfere with each other and can interact and clean each other.

[0021] 4. A corrugated pipe is installed between the first annular pipe and the bend. The corrugated pipe is expandable and expandable, and the height and angle of the first annular pipe can be changed, that is, the position of the air outlet nozzle can be changed. The same applies to the second annular pipe, which further increases the sludge removal range of this device.

[0022] 5. With the help of the stabilizing block and the retainer, one end of the first and second annular pipes can be limited, resulting in good stability. By setting a universal ball, the universal ball can roll, further increasing the flexibility and stability of the adjustment of the first and second annular pipes. Attached Figure Description

[0023] Figure 1 This is a partial structural diagram of the absorption tower shell of this utility model.

[0024] Figure 2 This is an overall sectional view of the present invention.

[0025] Figure 3 This is a schematic diagram of the first and second dredging mechanisms of this utility model.

[0026] Figure 4 This is a schematic diagram of the first dredging mechanism of this utility model.

[0027] Figure 5 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0028] In the diagram: 1. Absorption tower mechanism; 11. Base; 12. Absorption tower shell; 13. Discharge pipe; 2. First sludge removal mechanism; 21. First annular pipe; 22. Corrugated pipe; 23. Bend; 24. T-joint; 25. Connecting valve; 26. End nozzle; 27. Air outlet nozzle; 3. Second sludge removal mechanism; 31. Second annular pipe; 32. Water outlet nozzle; 4. Stabilizing mechanism; 41. Stabilizing block; 42. Cage; 43. Universal ball. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1: Please refer to Figure 1 - Figure 4 A rapid sludge removal system for desulfurization absorption towers in thermal power plants includes an absorption tower mechanism 1. The absorption tower mechanism 1 includes a base 11 and an absorption tower shell 12 installed on the upper end of the base 11. The absorption tower mechanism 1 serves as the reaction zone for desulfurization, and the slurry at the bottom of the absorption tower shell 12 contains substances such as gypsum.

[0031] The absorption tower mechanism 1 is equipped with a first sludge removal mechanism 2 and a second sludge removal mechanism 3. The two have similar structures. The first sludge removal mechanism 2 and the second sludge removal mechanism 3 can work together to remove sludge from the bottom of the absorption tower shell 12, so as to solve the shortcomings of traditional agitator sludge removal.

[0032] The first dredging mechanism 2 includes a first annular pipe 21 and a bend 23 connected to the lower end of the first annular pipe 21. The bend 23 is connected to the bottom of the absorption tower shell 12. One end of the bend 23 is connected to a tee pipe 24, and one end of the tee pipe 24 is connected to a connecting valve 25. Multiple equidistant air nozzles 27 are provided on the first annular pipe 21.

[0033] The connecting valve 25 is connected to the base 11. The connecting valve 25 is a DN50 valve. One side of it is located on the outside of the base 11 and is used to connect the compressed air pipeline. After the connecting valve 25 is opened, the compressed air enters the first annular pipeline 21 through the connecting valve 25 and the bend 23, and finally is sprayed out through the air outlet nozzle 27. The compressed air sprayed out by the air outlet nozzle 27 can flush the inner wall of the absorption tower shell 12 and the second sludge removal mechanism 3. It can not only flush away the sediment on the second sludge removal mechanism 3, but also flush away the scouring material on the bottom wall of the absorption tower shell 12.

[0034] The second sludge removal mechanism 3 is also equipped with a connecting valve 25. This connecting valve 25 is connected to process water. The process water can flush the inner wall of the absorption tower shell 12 and also clean each other with the first annular pipe 21 to achieve the purpose of dilution and flow, so that the slurry is suspended, which further plays a role in the rapid sludge removal of this device. A discharge pipe 13 is opened at the bottom of the absorption tower shell 12. The mixture of precipitate and process water after flushing is discharged to the outside of the absorption tower shell 12 through the discharge pipe 13, which greatly improves the sludge removal efficiency.

[0035] This device utilizes the disturbances caused by the access to process water and compressed air to compensate for the insufficient disturbance range of the agitator in the absorption tower mechanism 1.

[0036] Example 2: Please refer to Figure 1 - Figure 4 The first annular pipe 21 is provided with an end nozzle 26 at the end away from the corrugated pipe 22, which can spray air at the end, increasing the disturbance range of the device.

[0037] The second sludge removal mechanism 3 is located on both sides of the inside of the absorption tower shell 12, opposite to the first sludge removal mechanism 2. The second sludge removal mechanism 3 includes a second annular pipe 31, with a water outlet nozzle 32 arranged every 30cm on the second annular pipe 31. The water outlet nozzle 32 is a 2205 duplex stainless steel nozzle. After the second annular pipe 31 is connected to the process water, water is sprayed out from the water outlet nozzle 32 to remove sludge from the device. Except for the nozzles, the second sludge removal mechanism 3 has the same structure as the first sludge removal mechanism 2. When sludge removal is required, the flushing water and compressed air valves are switched on and off. The water and air interfere with the sludge inside the absorption tower, thereby accelerating the flushing and cleaning process.

[0038] The gas outlet nozzle 27 has different orientations. During the gas spraying process, half of the spray range of the gas outlet nozzle 27 is located on the second annular pipe 31. Therefore, the gas outlet nozzle 27 can not only disturb the inside of the absorption tower shell 12, but also clean the residue on the second annular pipe 31 for subsequent cleaning.

[0039] Both the first annular pipe 21 and the second annular pipe 31 are spirally distributed. Compared with circular pipes, their length is increased, allowing for the installation of multiple nozzles. The adjacent air nozzles 27 and water nozzles 32 are set at different heights, increasing the vertical cleaning range of the device and resulting in better performance.

[0040] The first annular pipe 21 and the second annular pipe 31 are vertically alternately distributed, ensuring that the first annular pipe 21 and the second annular pipe 31 do not interfere with each other, but can interact and clean each other. Excess process water slides down along the spiral annular pipe, which is easy to clean.

[0041] Example 3: Please refer to Figure 2 - Figure 5 A bellows 22 is installed between the first annular pipe 21 and the bend 23. The bellows 22 is telescopic, and its telescopic range depends on the pressure of the compressed air. The greater the pressure, the greater the extension range of the bellows 22. Conversely, when the bellows 22 returns to its original position and extends, the first annular pipe 21 connected to it will rotate and shift to a certain extent. The height and angle of the first annular pipe 21 can be changed, that is, the position of the air nozzle 27 can be changed. The same applies to the second annular pipe 31, which further increases the sludge removal range of this device.

[0042] The corrugated pipe 22 is a flexible structure. During rotation and tilting, the offset direction of the first annular pipe 21 and the second annular pipe 31 is uncontrollable and may touch the inner wall of the absorption tower shell 12. To solve this problem, the device also installs two stabilizing mechanisms 4 inside the absorption tower mechanism 1 to stabilize the first annular pipe 21 and the second annular pipe 31 respectively. The stabilizing mechanism 4 includes a stabilizing block 41 fixedly installed on the inner wall of the absorption tower shell 12 and a retainer 42 fixedly installed on the inner wall of the stabilizing block 41. The inner diameter of the retainer 42 is larger than that of the first annular pipe 21 and the second annular pipe 31 to ensure that the two retainers 42 can still slide and connect with the first annular pipe 21 and the second annular pipe 31 respectively under the action of the corrugated pipe 22. That is, the offset direction of the first annular pipe 21 and the second annular pipe 31 will definitely be within the range of the retainer 42 and will not touch the inner wall of the absorption tower shell 12. Under the action of the stabilizing block 41 and the retainer 42, one end of the first annular pipe 21 and the second annular pipe 31 can be limited, and the stabilizing effect is good. The stabilizing mechanism 4 can be set in multiple ways according to the actual situation, so as to prevent the first annular pipe 21 and the second annular pipe 31 from shifting in the radial direction.

[0043] A universal ball 43 is rotatably mounted on the inner wall of the retainer 42, and the universal ball 43 is rotatably disposed on the outer periphery of the first annular pipe 21 and the second annular pipe 31.

[0044] By incorporating a swivel ball 43, which is capable of rolling, the outer walls of the first annular pipe 21 and the second annular pipe 31 adapt to the changing positions of the pipes as they roll along the swivel ball 43, further increasing the flexibility and stability of the adjustment of the pipes 21 and 31. The balls inside the swivel ball 43 can contact the outer walls of the pipes 21 and 31. When the bellows 22 extends, the first annular pipe 21 and the second annular pipe 31 will move axially along the swivel ball 43. The balls reduce friction while simultaneously fixing the pipes 21 and 31 radially.

[0045] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rapid desilting system for a desulfurization absorption tower of a thermal power plant, comprising an absorption tower mechanism (1), characterized in that: The absorption tower mechanism (1) comprises a base (11) and an absorption tower shell (12) installed on the upper end of the base (11), and a discharge pipe (13) is arranged at the bottom of the absorption tower shell (12). The absorption tower mechanism (1) is internally provided with a first dredging mechanism (2) and a second dredging mechanism (3), the first dredging mechanism (2) comprises a first annular pipeline (21) and a bend pipe (23) communicated and installed at the lower end of the first annular pipeline (21), one end of the bend pipe (23) is communicated and installed with a tee pipe (24), and one end of the tee pipe (24) is communicated and installed with a connecting valve (25). A plurality of equidistantly distributed air outlet nozzles (27) are arranged on the first annular pipeline (21).

2. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 1, characterized in that: The bend pipe (23) is communicated with the bottom of the absorption tower shell (12), and the connecting valve (25) is communicated with the base (11).

3. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 1, characterized in that: The first annular pipeline (21) and the bend pipe (23) are jointly communicated and installed with a corrugated pipe (22).

4. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 3, characterized in that: The second dredging mechanism (3) comprises a second annular pipeline (31), and a plurality of equidistantly distributed water outlet nozzles (32) are arranged on the second annular pipeline (31).

5. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 4, characterized in that: The first annular pipeline (21) and the second annular pipeline (31) are both spirally distributed, and the first annular pipeline (21) is provided with an end nozzle (26) at the end away from the corrugated pipe (22).

6. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 5, characterized in that: The second dredging mechanism (3) is identical in structure to the first dredging mechanism (2), and the second dredging mechanism (3) is arranged opposite to the first dredging mechanism (2) on the two sides of the inside of the absorption tower shell (12).

7. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 6, characterized in that: The absorption tower mechanism (1) is further internally provided with two stabilizing mechanisms (4), the stabilizing mechanism (4) comprises a stabilizing block (41) fixedly installed on the inner wall of the absorption tower shell (12) and a retainer (42) fixedly installed on the inner wall of the stabilizing block (41), and the two retainers (42) are respectively slidably connected with the first annular pipeline (21) and the second annular pipeline (31).

8. A rapid desilting system for a desulfurization absorption tower of a thermal power plant according to claim 7, characterized in that: A universal ball (43) is rotatably installed on the inner wall of the retainer (42), and the universal ball (43) is rotatably arranged on the outer periphery of the first annular pipeline (21) and the second annular pipeline (31).

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