Power plant engineering wastewater treatment device and method

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a power plant engineering wastewater treatment device and method.The side wall of a rotating shaft is fixedly provided with a first bevel gear, the side wall of the first bevel gear is meshed with a second bevel gear, the side wall of the second bevel gear is meshed with a third bevel gear, and the bottom of the third bevel gear is fixedly provided with a mounting ring; a cleaning strip is fixedly mounted at the bottom of the mounting ring, a fixing ring is fixedly mounted on the side wall of the rotating shaft, a stirring rod is fixedly mounted above the fixing ring, and the cleaning strip at the bottom of the mounting ring does clockwise circular motion along with the fixing ring and is attached to the interior of the mixing barrel to clean the barrel wall and the internal space; the stirring rod above the fixing ring does anticlockwise circular motion to stir wastewater, so that a flocculating agent is in full contact with the wastewater, and the cleaning strip also disturbs the wastewater in the rotating process, so that the mixing and cleaning effects in the wastewater treatment process are greatly improved, and the wastewater treatment quality and efficiency are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a power plant engineering wastewater treatment device and method. Background Art

[0002] In the daily operation of a power plant, the effective treatment of engineering wastewater is a crucial task. Due to its diverse sources, including cooling tower drainage, boiler blowdown, coal conveying system flushing water, etc., the composition of power plant engineering wastewater is complex, containing a large amount of suspended solids, dissolved salts, heavy metal ions, and organic pollutants. To make these wastewaters meet the discharge standards or achieve reuse, a series of complex treatment processes are required, among which the mixing and cleaning links play a key role in the entire wastewater treatment process.

[0003] Most traditional power plant engineering wastewater treatment devices use simple stirring methods for mixing and cleaning. Usually, only a single stirrer is relied on to stir the wastewater. This single stirring method makes it difficult for flocculants to be evenly distributed in the wastewater, resulting in insufficient contact between the wastewater in some areas and the flocculants, and the inability to effectively carry out the flocculation reaction, thereby affecting the subsequent precipitation and filtration effects. Eventually, the treated water quality is difficult to reach the ideal standard. In the cleaning link, traditional devices often lack comprehensive and effective cleaning measures for the inside of the mixing tank. As the wastewater treatment process continues, various impurities are likely to adhere to the inner wall and bottom of the mixing tank. The accumulation of these impurities not only affects the mixing effect but may also breed bacteria, causing secondary pollution to the wastewater. Moreover, traditional cleaning methods may require manual cleaning at regular intervals, which not only increases the workload of the operators but may also lead to long-term residue of impurities in the tank due to untimely or incomplete cleaning, seriously affecting the normal operation and treatment efficiency of the wastewater treatment device. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a power plant engineering wastewater treatment device and method, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The specific structure of a power plant engineering wastewater treatment device includes a mixing barrel. An outlet is provided on the side wall of the mixing barrel. A motor is fixedly installed at the top of the mixing barrel. A stirring mechanism is fixedly installed at the output end of the motor. The stirring mechanism includes a rotating shaft. The rotating shaft is fixedly installed at the output end of the motor. A hollow truncated cone is fixedly installed on the side wall of the rotating shaft. A first bevel gear is fixedly installed on the side wall of the rotating shaft. A second bevel gear is meshingly installed on the side wall of the first bevel gear. A third bevel gear is meshingly installed on the side wall of the second bevel gear. An installation ring is fixedly installed at the bottom of the third bevel gear. A cleaning strip is fixedly installed at the bottom of the installation ring. A fixing ring is fixedly installed on the side wall of the rotating shaft. A stirring rod is fixedly installed above the fixing ring. Stirring blades are fixedly installed on the side wall of the rotating shaft.

[0007] In a possible implementation, the stirring blades are attached to the inside of the mixing barrel, and the second bevel gear is rotatably installed inside the mixing barrel.

[0008] In a possible implementation, the third bevel gear is rotatably installed on the side wall of the rotating shaft, and the cleaning strip is attached to the inside of the mixing barrel.

[0009] In a possible implementation, a first plug is slidably installed inside the mixing barrel, and a filter frame is slidably installed at the bottom.

[0010] In a possible implementation, a second plug is fixedly installed at the bottom of the filter frame, and both the second plug and the filter frame are slidably installed inside the mixing barrel.

[0011] In a possible implementation, a roller is rotatably installed at the bottom of the filter frame. The roller is movably installed above the hollow truncated cone. A telescopic cylinder is fixedly installed at the top of the filter frame, and the telescopic cylinder is fixedly installed inside the mixing barrel.

[0012] In a possible implementation, a mounting bracket is fixedly installed on the side wall of the mixing barrel. An electric valve is fixedly installed at the bottom of the mixing barrel. A cover plate is fixedly installed at the bottom of the electric valve. A filter cylinder is fixedly installed at the bottom of the cover plate.

[0013] In a possible implementation, a filter plate is fixedly installed inside the filter cylinder, and a sliding cover is slidably installed inside the filter cylinder.

[0014] In a possible implementation, a water outlet pipe is fixedly installed at the bottom of the filter cylinder. An installation column is fixedly installed on the top of the cover plate, and the installation column is fixedly installed with the bottom of the mixing barrel.

[0015] In a possible implementation, S1: wastewater is added from the telescopic cylinder at the top of the mixing barrel and flows into the filter frame. The filter frame performs preliminary filtration on the wastewater, and the waste residue remains in the filter frame. The filtered wastewater can enter the lower space of the mixing barrel through the filter frame. At this time, the first block and the second block block block the discharge port on the side wall of the mixing barrel to prevent the wastewater from flowing out. When all the wastewater passes through the filter frame, the motor is started, and the motor drives the rotating shaft to rotate counterclockwise, and the hollow truncated cone on the rotating shaft rotates accordingly. Since the roller is located above the hollow truncated cone and is movable, the roller will rotate along the top of the hollow truncated cone, so that the filter frame installed on the roller continuously reciprocates up and down, generating vibration. Because there is a slope in the filter frame, during the vibration process, the waste residue in the filter frame will move toward the discharge port, and finally flow out of the filter frame through the discharge port, completing the cleaning of the filter frame;

[0016] S2: When the motor drives the shaft to rotate, the first bevel gear on the side wall of the shaft also rotates counterclockwise, the first bevel gear meshes with the second bevel gear, driving the second bevel gear to rotate counterclockwise, the second bevel gear meshes with the third bevel gear, causing the third bevel gear to rotate clockwise, the third bevel gear drives the mounting ring at its bottom to rotate clockwise, and the cleaning strip at the bottom of the mounting ring makes a clockwise circular motion accordingly, fits inside the mixing barrel, and cleans the inside of the mixing barrel. At the same time, the shaft drives the fixing ring to rotate counterclockwise, and the stirring rod above the fixing ring makes a counterclockwise circular motion to stir the wastewater. The cleaning strip also disturbs the wastewater during the rotation process. In addition, the stirring blade on the side wall of the shaft also rotates counterclockwise, while cleaning the bottom of the mixing barrel, further stirring the wastewater, so that the wastewater and the added flocculant are mixed more evenly;

[0017] S3: After the wastewater and flocculant are mixed, open the electric valve at the bottom of the mixing barrel, and the water and the formed flocs flow into the filter cartridge below through the electric valve. The filter plate in the filter cartridge performs secondary filtration on the water and flocs. The filtered water flows out of the device through the outlet pipe at the bottom of the filter cartridge, and the flocs remain in the filter cartridge. When there are too many flocs in the filter cartridge, pull the sliding cover inside the filter cartridge, and the flocs can flow out from the inside of the filter cartridge. The mounting column on the top of the cover is fixed to the bottom of the mixing barrel, which increases the stability of the cover and the entire structure.

[0018] Beneficial effects compared with the prior art:

[0019] 1. In this scheme, by setting a unique filter frame, roller and hollow truncated cone structure inside the mixing barrel, efficient and automatic cleaning of the waste residue in the filter frame is achieved. Wastewater is added from the telescopic cylinder on the top of the mixing barrel. After preliminary filtration by the filter frame, the waste residue remains in the frame. When all the wastewater passes through the filter frame, the motor is started, and the motor drives the rotating shaft to rotate, thereby making the hollow truncated cone fixed on the side wall of the rotating shaft rotate counterclockwise. Since the roller is movably installed above the hollow truncated cone, it will rotate along the top of the hollow truncated cone, so that the filter frame installed on the roller continuously reciprocates up and down to generate vibration, and the filter frame is designed with a slope. This vibration combined with the slope makes the waste residue inside the filter frame gradually move toward the discharge port during the vibration process, and finally flows out of the filter frame through the discharge port. This process does not require manual cleaning of waste residue, which not only reduces labor costs, but also greatly improves the efficiency of waste residue cleaning, ensuring that the filter frame can continuously and efficiently filter wastewater, providing a stable and reliable pretreatment link for subsequent wastewater treatment processes;

[0020] 2. In this scheme, with the help of a series of transmission structures such as the rotating shaft and the first bevel gear, the second bevel gear, the third bevel gear and so on connected thereto, comprehensive mixing and cleaning coordination work inside the mixing barrel is realized. When the motor drives the rotating shaft to rotate, the first bevel gear on the side wall of the rotating shaft rotates counterclockwise, the first bevel gear meshes with the second bevel gear, driving the second bevel gear to rotate counterclockwise, the second bevel gear meshes with the third bevel gear, prompting the third bevel gear to rotate clockwise, and the third bevel gear drives the mounting ring at its bottom to rotate clockwise, and the cleaning strip at the bottom of the mounting ring performs clockwise circular motion accordingly, fits inside the mixing barrel, and cleans the barrel wall and the internal space. The cleaning bar also disturbs the wastewater during the rotation process, further increasing the fluidity of the wastewater. In addition, the stirring blades on the side wall of the shaft also rotate counterclockwise, cleaning the bottom of the mixing barrel while stirring the wastewater again. The multi-directional synergistic effect makes the wastewater and the added flocculant mix more evenly, greatly improving the mixing and cleaning effects during the wastewater treatment process, and ensuring the quality and efficiency of wastewater treatment.

[0021] 3. In this solution, structures such as the electric valve at the bottom of the mixing barrel, the filter cartridge, and the filter plate are used to achieve convenient secondary filtration and cleaning of the mixed water and flocs. After the wastewater and the flocculant are mixed in the mixing barrel, the electric valve is opened, and the water and the formed flocs flow into the lower filter cartridge through the electric valve. The filter plate fixedly installed in the filter cartridge performs secondary filtration on the water and the flocs, effectively intercepting the flocs, enabling the filtered water to flow out of the device through the water outlet pipe at the bottom of the filter cartridge, ensuring that the quality of the outflowing water meets the requirements. When there are too many flocs in the filter cartridge, simply pull the sliding cover slidably installed inside the filter cartridge, and the flocs can flow out from the inside of the filter cartridge. The operation is simple and convenient. Moreover, the mounting posts fixedly installed on the top of the cover plate are fixedly installed with the bottom of the mixing barrel, increasing the stability of the cover plate and the entire structure, ensuring that the filter cartridge can work stably during the secondary filtration process. This design not only effectively guarantees the quality of the treated effluent but also facilitates the cleaning of the flocs, improving the practicability and reliability of the entire wastewater treatment device, and ensuring that the device can operate stably for a long time. Brief Description of the Drawings

[0022] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the filter frame of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the roller of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the mounting ring of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the electric valve of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the sliding cover of the present invention;

[0029] Legend Explanation: 11, mixing barrel; 12, first blocking block; 13, filter frame; 14, second blocking block; 15, telescopic cylinder; 16, motor; 17, rotating shaft; 18, hollowed-out circular table; 19, first bevel gear; 21, second bevel gear; 22, third bevel gear; 23, mounting ring; 24, cleaning strip; 25, fixed ring; 26, stirring rod; 27, stirring blade; 28, roller; 29, mounting bracket; 31, electric valve; 32, cover plate; 33, filter cartridge; 34, filter plate; 35, sliding cover; 36, water outlet pipe; 38, mounting post. Detailed Implementation Manner

[0030] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms. Therefore, the present invention is not limited to the embodiments described below. Additionally, in order to more clearly describe the present invention, components not connected to the invention will be omitted from the drawings;

[0031] The technical solutions in the embodiments of the present application are to solve the problems in the above-mentioned background technology, and the general idea is as follows:

[0032] Embodiment:

[0033] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, this embodiment introduces the specific structure of a power plant engineering wastewater treatment device, including a mixing barrel 11. There is a discharge port on the side wall of the mixing barrel 11. A first plug 12 is slidably installed inside the mixing barrel 11. A filter frame 13 is fixedly installed at the bottom of the first plug 12. The wastewater will be filtered through the filter frame 13, and the waste residue will remain inside the filter frame 13. A second plug 14 is fixedly installed at the bottom of the filter frame 13. The first plug 12 and the second plug 14 will block the discharge port to prevent the wastewater from flowing out of the discharge port. Both the second plug 14 and the filter frame 13 are slidably installed inside the mixing barrel 11. A roller 28 is rotatably installed at the bottom of the filter frame 13. A telescopic cylinder 15 is fixedly installed at the top of the filter frame 13. The wastewater is added into the filter frame 13 from the telescopic cylinder 15. The telescopic cylinder 15 is fixedly installed inside the mixing barrel 11. A motor 16 is fixedly installed at the top of the mixing barrel 11. When all the wastewater has passed through the filter frame 13, the motor 16 is started. The motor 16 drives the rotating shaft 17 to rotate counterclockwise. The rotating shaft 17 will drive the hollow frustum 18 to rotate counterclockwise. The output end of the motor 16 is fixedly installed with the rotating shaft 17. A hollow frustum 18 is fixedly installed on the side wall of the rotating shaft 17. The roller 28 is movably installed above the hollow frustum 18. The roller 28 will rotate along the upper part of the hollow frustum 18. The roller 28 makes the filter frame 13 continuously move up and down reciprocally. The filter frame 13 will vibrate. Because there is a slope inside the filter frame 13, through continuous up and down reciprocating movement, the waste residue inside the filter frame 13 will move towards the discharge port. The waste residue then flows out of the inside of the filter frame 13 through the waste outlet, completing the cleaning. A first bevel gear 19 is fixedly installed on the side wall of the rotating shaft 17. A flocculant is added. The rotating shaft 17 drives the first bevel gear 19 to rotate counterclockwise. A second bevel gear 21 is meshingly installed on the side wall of the first bevel gear 19. The first bevel gear 19 drives the second bevel gear 21 to rotate counterclockwise. The second bevel gear 21 is rotatably installed inside the mixing barrel 11. A third bevel gear 22 is meshingly installed on the side wall of the second bevel gear 21. The second bevel gear 21 drives the third bevel gear 22 to rotate clockwise. The third bevel gear 22 is rotatably installed on the side wall of the rotating shaft 17. An installation ring 23 is fixedly installed at the bottom of the third bevel gear 22. The third bevel gear 22 drives the installation ring 23 to rotate clockwise. A cleaning strip 24 is fixedly installed at the bottom of the installation ring 23. The installation ring 23 drives the cleaning strip 24 to make a clockwise circular motion. The cleaning strip 24 is attached to the inside of the mixing barrel 11. The cleaning strip 24 will clean the inside of the mixing barrel 11. A fixing ring 25 is fixedly installed on the side wall of the rotating shaft 17. The rotating shaft 17 also drives the fixing ring 25 to rotate counterclockwise. A stirring rod 26 is fixedly installed above the fixing ring 25. The fixing ring 25 drives the stirring rod 26 to make a counterclockwise circular motion. The stirring rod 26 stirs the wastewater. The cleaning strip 24 also turbulates the wastewater at the same time. A stirring blade 27 is fixedly installed on the side wall of the rotating shaft 17. The stirring blade 27 is attached to the inside of the mixing barrel 11. The rotating shaft 17 also drives the stirring blade 27 to rotate counterclockwise. While cleaning the bottom of the mixing barrel 11, the wastewater is stirred again to make the wastewater and the coagulant mix more evenly.The side wall of the mixing barrel 11 is fixedly installed with a mounting frame 29, and the bottom of the mixing barrel 11 is fixedly installed with an electric valve 31. When the mixing is completed, the electric valve 31 is opened, and the water and flocs will flow into the filter cartridge 33 through the electric valve 31. A cover plate 32 is fixedly installed at the bottom of the electric valve 31, and a filter cartridge 33 is fixedly installed at the bottom of the cover plate 32. A filter plate 34 is fixedly installed inside the filter cartridge 33, and the filter plate 34 will filter the water and flocs here. A sliding cover 35 is slidably installed inside the filter cartridge 33, and an outlet pipe 36 is fixedly installed at the bottom of the filter cartridge 33. The filtered water will flow out of the device through the outlet pipe 36, and the flocs will remain in the filter cartridge 33. When there are too many flocs in the filter cartridge 33, the flocs will flow out of the filter cartridge 33 by pulling the sliding cover 35. A mounting column 38 is fixedly installed on the top of the cover plate 32. The mounting column 38 increases the stability of the cover plate 32, and the mounting column 38 is fixedly installed at the bottom of the mixing barrel 11.

[0034] Working principle: wastewater is added from the telescopic cylinder 15 at the top of the mixing barrel 11 and flows into the filter frame 13. The filter frame 13 performs preliminary filtration on the wastewater, and the waste residue remains in the filter frame 13. The filtered wastewater can enter the lower space of the mixing barrel 11 through the filter frame 13. At this time, the first block 12 and the second block 14 block the discharge port of the side wall of the mixing barrel 11 to prevent the wastewater from flowing out. When all the wastewater passes through the filter frame 13, the motor 16 is started, and the motor 16 drives the rotating shaft 17 to rotate counterclockwise, and the hollow truncated cone 18 on the rotating shaft 17 rotates accordingly. Since the roller 28 is located above the hollow truncated cone 18 and is movable, the roller 28 will rotate along the top of the hollow truncated cone 18, so that the filter frame 13 installed on the roller 28 continuously reciprocates up and down, generating vibration. Because there is a slope in the filter frame 13, during the vibration process, the waste residue in the filter frame 13 will move toward the discharge port, and finally flow out of the filter frame 13 through the discharge port, completing the cleaning of the filter frame 13.

[0035] When the motor 16 drives the rotating shaft 17 to rotate, the first bevel gear 19 on the side wall of the rotating shaft 17 also rotates counterclockwise, and the first bevel gear 19 meshes with the second bevel gear 21, driving the second bevel gear 21 to rotate counterclockwise, and the second bevel gear 21 meshes with the third bevel gear 22, causing the third bevel gear 22 to rotate clockwise, and the third bevel gear 22 drives the mounting ring 23 at its bottom to rotate clockwise, and the cleaning strip 24 at the bottom of the mounting ring 23 performs a clockwise circular motion accordingly, fits inside the mixing barrel 11, and cleans the inside of the mixing barrel 11. At the same time, the rotating shaft 17 drives the fixing ring 25 to rotate counterclockwise, and the stirring rod 26 above the fixing ring 25 performs a counterclockwise circular motion to stir the wastewater. The cleaning strip 24 also disturbs the wastewater during the rotation process. In addition, the stirring blade 27 on the side wall of the rotating shaft 17 also rotates counterclockwise, while cleaning the bottom of the mixing barrel 11, further stirring the wastewater, so that the wastewater and the added flocculant are mixed more evenly;

[0036] After the wastewater and the flocculant are fully mixed in the mixing tank 11, the operator only needs to open the electric valve 31 at the bottom of the mixing tank 11, and the water and the formed flocs will then flow through the electric valve 31 along the trend and naturally flow into the lower filter cylinder 33. The filter plate 34 carefully arranged in the filter cylinder 33 can perform secondary filtration on the water and the flocs. The filtered clear water smoothly flows out of the device through the water outlet pipe 36 at the bottom of the filter cylinder 33, while the flocs are effectively intercepted and remain inside the filter cylinder 33. When the flocs in the filter cylinder 33 gradually accumulate too much, the operator only needs to operate the sliding cover 35 inside the filter cylinder 33, and the flocs can conveniently flow out from the inside of the filter cylinder 33. The mounting post 38 at the top of the cover plate 32 is tightly and fixedly installed at the bottom of the mixing tank 11, which increases the stability of the cover plate 32 and the entire structure, ensuring that the device can operate stably and reliably during long-term wastewater treatment work.

[0037] Finally, it should be noted that: Obviously, the above embodiments are only examples given to clearly illustrate the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. The specific structure of a waste water treatment device for a power plant project, including a mixing barrel (11), wherein a discharge port is provided on the side wall of the mixing barrel (11), and is characterized in that, A motor (16) is fixedly installed at the top of the mixing barrel (11); A stirring mechanism is fixedly installed at the output end of the motor (16). The stirring mechanism includes a rotating shaft (17). The rotating shaft (17) is fixedly installed at the output end of the motor (16). A hollow frustum (18) is fixedly installed on the side wall of the rotating shaft (17). A first bevel gear (19) is fixedly installed on the side wall of the rotating shaft (17). A second bevel gear (21) is meshingly installed on the side wall of the first bevel gear (19). A third bevel gear (22) is meshingly installed on the side wall of the second bevel gear (21). An installation ring (23) is fixedly installed at the bottom of the third bevel gear (22). A cleaning strip (24) is fixedly installed at the bottom of the installation ring (23). A fixing ring (25) is fixedly installed on the side wall of the rotating shaft (17). A stirring rod (26) is fixedly installed above the fixing ring (25). A stirring blade (27) is fixedly installed on the side wall of the rotating shaft (17).

2. The wastewater treatment device for a power plant project according to claim 1, wherein The stirring blade (27) is attached to the inside of the mixing barrel (11), and the second bevel gear (21) is rotatably installed inside the mixing barrel (11).

3. An industrial wastewater treatment device for a power plant as described in claim 2, characterized in that, The third bevel gear (22) is rotatably installed on the side wall of the rotating shaft (17), and the cleaning strip (24) is attached to the inside of the mixing barrel (11).

4. The wastewater treatment device for a power plant project according to claim 3, characterized in that, A first plug (12) is slidably installed inside the mixing barrel (11), and a filter frame (13) is slidably installed at the bottom.

5. The wastewater treatment device for a power plant project according to claim 4, wherein A second plug (14) is fixedly installed at the bottom of the filter frame (13), and both the second plug (14) and the filter frame (13) are slidably installed inside the mixing barrel (11).

6. The wastewater treatment device for a power plant project according to claim 5, wherein A roller (28) is rotatably installed at the bottom of the filter frame (13). The roller (28) is movably installed above the hollow frustum (18). A telescopic cylinder (15) is fixedly installed at the top of the filter frame (13), and the telescopic cylinder (15) is fixedly installed inside the mixing barrel (11).

7. The wastewater treatment device for a power plant project according to claim 6, wherein, An installation frame (29) is fixedly installed on the side wall of the mixing barrel (11). An electric valve (31) is fixedly installed at the bottom of the mixing barrel (11). A cover plate (32) is fixedly installed at the bottom of the electric valve (31). A filter cylinder (33) is fixedly installed at the bottom of the cover plate (32).

8. The wastewater treatment device for a power plant project according to claim 7, characterized in that, A filter plate (34) is fixedly installed inside the filter cylinder (33), and a sliding cover (35) is slidably installed inside the filter cylinder (33).

9. The wastewater treatment device for a power plant project according to claim 8, wherein A water outlet pipe (36) is fixedly installed at the bottom of the filter cylinder (33). An installation column (38) is fixedly installed at the top of the cover plate (32), and the installation column (38) is fixedly installed with the bottom of the mixing barrel (11).

10. The usage method of a power plant engineering wastewater treatment device according to claim 9, characterized in that, The steps are as follows: S1: The wastewater is added through the telescopic cylinder (15) at the top of the mixing barrel (11) and flows into the filter frame (13). The filter frame (13) preliminarily filters the wastewater, and the waste residue remains in the filter frame (13). The filtered wastewater can enter the lower space of the mixing barrel (11) through the filter frame (13). At this time, the first plug (12) and the second plug (14) block the discharge port on the side wall of the mixing barrel (11) to prevent the wastewater from flowing out. When all the wastewater has passed through the filter frame (13), the motor (16) is started. The motor (16) drives the rotating shaft (17) to rotate counterclockwise, and the hollow truncated cone (18) on the rotating shaft (17) rotates accordingly. Since the roller (28) is located above the hollow truncated cone (18) and can move, the roller (28) will rotate along the upper part of the hollow truncated cone (18), so that the filter frame (13) installed on the roller (28) moves up and down continuously in a reciprocating motion, generating vibrations. Also, because there is a slope in the filter frame (13), during the vibration process, the waste residue in the filter frame (13) will move towards the discharge port and finally flow out of the filter frame (13) through the discharge port, completing the cleaning of the filter frame (13). S2: When the motor (16) drives the rotating shaft (17) to rotate, the first bevel gear (19) on the side wall of the rotating shaft (17) also rotates counterclockwise. The first bevel gear (19) meshes with the second bevel gear (21), driving the second bevel gear (21) to rotate counterclockwise. The second bevel gear (21) meshes with the third bevel gear (22) again, causing the third bevel gear (22) to rotate clockwise. The third bevel gear (22) drives the mounting ring (23) at its bottom to rotate clockwise, and the cleaning strip (24) at the bottom of the mounting ring (23) rotates in a clockwise circular motion accordingly, fitting inside the mixing barrel (11) to clean the inside of the mixing barrel (11). At the same time, the rotating shaft (17) drives the fixed ring (25) to rotate counterclockwise, and the stirring rod (26) above the fixed ring (25) rotates in a counterclockwise circular motion to stir the wastewater. The cleaning strip (24) also causes turbulence in the wastewater during the rotation process. In addition, the stirring blade (27) on the side wall of the rotating shaft (17) also rotates counterclockwise, cleaning the bottom of the mixing barrel (11) while further stirring the wastewater to make the wastewater mix more evenly with the added flocculant. S3: When the wastewater and the flocculant are mixed completely, the electric valve (31) at the bottom of the mixing barrel (11) is opened, and the water and the formed flocs flow into the lower filter cylinder (33) through the electric valve (31). The filter plate (34) inside the filter cylinder (33) performs secondary filtration on the water and the flocs. The filtered water flows out of the device through the water outlet pipe (36) at the bottom of the filter cylinder (33), and the flocs remain inside the filter cylinder (33). When there is too much flocs inside the filter cylinder (33), the sliding cover (35) inside the filter cylinder (33) is pulled, and the flocs can flow out of the inside of the filter cylinder (33). The mounting post (38) at the top of the cover plate (32) is fixedly installed with the bottom of the mixing barrel (11), increasing the stability of the cover plate (32) and the entire structure.

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