Sludge discharge device for sewage treatment

Abstract

The utility model discloses a sludge discharge device for sewage treatment, which comprises a base, the top of the base is fixedly connected with a fixing frame, a sludge discharge bin is arranged above the base, the bottom of the sludge discharge bin is fixedly connected with a plurality of supporting legs, the bottom of the sludge discharge bin is fixedly connected with a bracket, and the bottom of the bracket is fixedly connected with a water tank. A drainage pipe is arranged at the bottom end of the sludge discharging bin, a drainage valve is installed on the drainage pipe, a centrifugal sludge discharging mechanism is arranged on the bracket, and a sludge scraping mechanism is arranged on the fixing frame. According to the utility model, solid-liquid separation of sewage and sludge can be realized under the action of centrifugal force, the sludge discharge efficiency is higher, the treatment period is shorter, the large-scale sewage sludge discharge requirement can be met, and the sewage and a flocculating agent can be stirred in the solid-liquid separation process, so that the flocculating agent and the sewage are fully mixed; sludge adhered to the inner wall of the device can be cleaned through the sludge scraping mechanism, and the sludge scraping mechanism is detachable, so that regular cleaning and replacement are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a sludge discharge device for wastewater treatment. Background Technology

[0002] Sludge is a solid waste generated during wastewater treatment, composed of water, organic / inorganic particles, and chemical additives. It requires treatment to achieve volume reduction, stabilization, and harmlessness. The sludge discharge process is a critical step in wastewater treatment, involving sludge concentration, stabilization, dewatering, and final disposal.

[0003] Currently, there are some sludge removal devices on the market, such as a sludge removal device for sewage treatment with publication number CN218810901U published on the China Patent Network. This sludge removal device can be used for sewage treatment, but it has some defects and shortcomings that need to be improved: (1) Some existing sludge removal devices separate sludge from sewage by gravity sedimentation to achieve sludge concentration and volume reduction. However, this sludge removal method that relies on natural sedimentation is inefficient and the treatment cycle is often long, so it cannot meet the needs of large-scale sewage sludge removal; (2) When treating sewage, it is usually necessary to add sludge removal devices. Adding flocculants can improve the separation efficiency of sewage and sludge. However, due to structural design reasons, some existing sludge discharge devices often have difficulty mixing flocculants with sewage after addition, thus reducing the flocculation effect of flocculants. (3) After long-term use, some existing sludge discharge devices usually use a sludge scraping structure to clean the sludge adhering to the inner wall to avoid sludge accumulation inside the device. However, the sludge scraping structure is often an integrated design, which is difficult to disassemble, making it inconvenient to clean the sludge scraping structure regularly. Moreover, it is not convenient to replace the sludge scraping structure when it is worn or malfunctions. Therefore, in view of the above problems, the sludge discharge device for sewage treatment provided by this utility model is of great significance. Utility Model Content

[0004] This utility model provides a sludge removal device for sewage treatment. Through a centrifugal sludge removal mechanism, solid-liquid separation of sewage and sludge can be achieved under centrifugal force. Compared with natural sedimentation, this method offers higher sludge removal efficiency and a shorter treatment cycle, effectively meeting the needs of large-scale sewage sludge removal. Multiple pairs of stirring blades installed on the rod body can stir the sewage and flocculant during the solid-liquid separation process, ensuring thorough mixing and effectively improving the flocculation effect of the flocculant. A sludge scraping mechanism can clean the sludge adhering to the inner wall of the device, preventing sludge accumulation and blockage. After prolonged use, the scraper can be periodically cleaned by unscrewing the scraper blade, and it can be easily replaced when worn. In summary, this invention solves the problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model discloses a sludge discharge device for sewage treatment, including a base, a fixed frame fixedly connected to the top of the base, a sludge discharge bin above the base, a plurality of support legs fixedly connected to the bottom of the sludge discharge bin, the bottom of the support legs fixedly connected to the base, a bracket fixedly connected to the bottom of the sludge discharge bin, a drain pipe opened at the bottom end of the sludge discharge bin, a drain valve installed on the drain pipe, a centrifugal sludge discharge mechanism provided on the bracket, and a sludge scraping mechanism provided on the fixed frame.

[0007] The centrifugal sludge discharge mechanism includes a motor, which is mounted on a bracket. The top of its output shaft passes through the bottom of the sludge discharge chamber and is fixedly connected to a centrifugal cylinder. The centrifugal cylinder is located inside the sludge discharge chamber, and its bottom wall has several drainage ports. Each drainage port is equipped with a filter screen.

[0008] The sludge scraping mechanism includes an electric telescopic rod, which is installed on the top of the fixed frame. A top cover is fixedly connected to the bottom of the output shaft. A sealing block is fixedly connected to the bottom of the top cover. An installation rod is fixedly connected to the center of the bottom of the sealing block. A sludge scraper is installed at the bottom of the installation rod. The sludge scraper is circular and has a layer of sludge scraping brushes at its edge.

[0009] Furthermore, the centrifuge tube is cylindrical with an open top that slopes outwards. The drain outlet is rectangular and is distributed in an equidistant ring along the circumference of the centrifuge tube, with the bottom of the drain outlet located above the scraper.

[0010] Furthermore, the sludge discharge bin is circular, and a water guide block is fixedly connected to its bottom. The water guide block is frustum-shaped with inclined end faces on its side walls, and a through hole is opened at the center of the water guide block. The bottom of the connection between the drain pipe and the sludge discharge bin is flush with the bottom surface of the water guide block.

[0011] Furthermore, the sealing block has a circular cross-section, and its diameter is equal to the inner diameter of the sludge discharge chamber.

[0012] Furthermore, the mounting rod is fixedly connected with several pairs of stirring blades, each pair of stirring blades is symmetrically distributed, and each pair of stirring blades is linearly distributed at equal intervals along the axial direction of the mounting rod.

[0013] Furthermore, the scraper blade is stepped, with its top diameter corresponding to the inner diameter of the centrifuge cylinder, and the scraper brush is annular, with its inner and outer diameters corresponding to the bottom diameter of the scraper blade and the inner diameter of the centrifuge cylinder, respectively.

[0014] Furthermore, an installation groove is provided at the center of the top surface of the scraper blade. The installation groove is circular, and its diameter is equal to that of the installation rod. The groove wall and the rod body are respectively provided with mating internal and external threads.

[0015] The present invention has the following advantages over the prior art:

[0016] (1) When the sludge discharge device for sewage treatment in this utility model is used, the solid-liquid separation of sewage and sludge can be achieved under the action of centrifugal force through the centrifugal sludge discharge mechanism. Compared with the natural sedimentation method, the sludge discharge efficiency is higher and the treatment cycle is shorter, which can effectively meet the needs of large-scale sewage sludge discharge.

[0017] (2) When the sludge discharge device for sewage treatment in this utility model is used, multiple pairs of stirring blades installed on the rod body can stir the sewage and flocculant during the solid-liquid separation process, so that the flocculant and sewage are fully mixed, thereby effectively improving the flocculation effect of the flocculant;

[0018] (3) When the sludge removal device for sewage treatment in this utility model is in use, the sludge adhering to the inner wall of the device can be cleaned by the sludge scraping mechanism to prevent sludge accumulation and blockage. After the sludge scraping mechanism has been used for a long time, the sludge scraping brush can be cleaned regularly by unscrewing the sludge scraping plate, and it can also be easily replaced in time when the sludge scraping plate is worn.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a sludge removal device for sewage treatment according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the base and the mud discharge chamber in this utility model;

[0023] Figure 3 This is a side sectional view of the base and the mud discharge chamber in this utility model;

[0024] Figure 4 This is a schematic diagram of the centrifugal sludge removal mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the sludge scraping mechanism in this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the scraper blade in this utility model;

[0027] Figure 7 This is a schematic diagram of the mud scraper in this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Base; 2. Fixing frame; 3. Sludge discharge bin; 4. Support leg; 5. Bracket; 6. Drain pipe; 7. Drain valve; 8. Motor; 9. Centrifuge cylinder; 10. Drain outlet; 11. Filter screen; 12. Electric telescopic rod; 13. Top cover; 14. Sealing block; 15. Mounting rod; 16. Sludge scraper; 17. Sludge scraper brush; 18. Water guide block; 19. Agitator blade; 20. Mounting groove. Detailed Implementation

[0030] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figure 1-7 As shown, a sludge discharge device for sewage treatment according to this utility model includes a base 1, a fixed frame 2 fixedly connected to the top of the base 1, a sludge discharge chamber 3 arranged above the base 1, a plurality of support legs 4 fixedly connected to the bottom of the sludge discharge chamber 3, the bottom of the support legs 4 fixedly connected to the base 1, a bracket 5 fixedly connected to the bottom of the sludge discharge chamber 3, and a drain pipe 6 opened at the bottom end of the sludge discharge chamber 3. A drain valve 7 is installed on the drain pipe 6, a centrifugal sludge discharge mechanism is arranged on the bracket 5, and a sludge scraping mechanism is arranged on the fixed frame 2.

[0033] The centrifugal sludge discharge mechanism includes a motor 8, which is mounted on a bracket 5. The top of the motor 8's output shaft passes through the bottom of the sludge discharge chamber 3 and is fixedly connected to a centrifugal cylinder 9. The centrifugal cylinder 9 is located inside the sludge discharge chamber 3, and its bottom wall has several drain ports 10. Each drain port 10 is equipped with a filter screen 11. When sewage containing sludge is introduced into the centrifugal cylinder 9, the motor 8 can be driven to rotate the centrifugal cylinder 9. At this time, the sludge will be thrown against the inner wall of the centrifugal cylinder 9 under the action of centrifugal force and form a sludge layer. The sewage can pass through the filter screen 11 and each drain port 10 and be discharged from the centrifugal cylinder 9. The sewage discharged from the centrifugal cylinder 9 can be collected at the bottom of the sludge discharge chamber 3. By opening the drain valve 7, the sewage can be discharged along the drain pipe 6 to achieve solid-liquid separation of sewage and sludge. Compared with natural sedimentation, this sludge discharge device has higher sludge discharge efficiency and shorter processing cycle, which can effectively meet the needs of large-scale sewage sludge discharge.

[0034] The sludge scraping mechanism includes an electric telescopic rod 12, which is mounted on the top of the fixed frame 2. A top cover 13 is fixedly connected to the bottom of the output shaft of the electric telescopic rod 12. A sealing block 14 is fixedly connected to the bottom of the top cover 13. An installation rod 15 is fixedly connected to the center of the bottom of the sealing block 14. A sludge scraper 16 is mounted on the bottom of the installation rod 15. The sludge scraper 16 is circular and has a layer of sludge scraping brushes 17 at its edge. When the sludge discharge device is used for a long time, the electric telescopic rod 12 can be driven to move the top cover 13, the installation rod 15, and the sludge scraper 16 upward together. When the sludge scraper 16 moves upward, the sludge scraping brushes 17 can scrape along the inner wall of the centrifuge cylinder 9 and the surface of the filter screen 11 in each drain outlet 10 to clean the sludge adhering to the inner wall of the device, thereby effectively preventing sludge accumulation and blockage.

[0035] The centrifuge cylinder 9 is cylindrical with an open top that slopes outward. The drain outlets 10 are rectangular and are distributed in an equidistant ring along the circumference of the centrifuge cylinder 9. The bottom of the drain outlets 10 is located above the scraper 16. The multiple drain outlets 10 can accelerate the discharge rate of sewage from the centrifuge cylinder 9, so that the sewage can be discharged as soon as possible. At the same time, the multiple drain outlets 10 can also play a role in diverting the flow, so as to reduce the filtration burden of the filter screen 11 in each drain outlet 10.

[0036] The sludge discharge chamber 3 is circular, and a water guide block 18 is fixedly connected to its bottom. The water guide block 18 is frustum-shaped with inclined end faces on its side walls, and a through hole is opened at the center of the water guide block 18. The bottom of the connection between the drain pipe 6 and the sludge discharge chamber 3 is flush with the bottom surface of the water guide block 18. When the sewage is discharged from the centrifuge cylinder 9 and collected at the bottom of the sludge discharge chamber 3, it can flow into the drain pipe 6 along the water guide block 18. The water guide block 18 can speed up the discharge efficiency of sewage and prevent sewage from settling at the bottom of the sludge discharge chamber 3 and failing to be discharged in time.

[0037] The sealing block 14 has a circular cross-section, and its diameter is equal to the inner diameter of the sludge discharge chamber 3. When the top cover 13 is placed on the top of the sludge discharge chamber 3, the sealing block 14 can fit against the inner wall of the sludge discharge chamber 3 to achieve a sealing effect, thereby effectively preventing the odor generated during the sludge discharge process from spreading into the air and causing pollution.

[0038] The mounting rod 15 has several pairs of stirring blades 19 fixedly connected to its shaft. Each pair of stirring blades 19 is symmetrically distributed and is equidistantly linearly distributed along the axial direction of the mounting rod 15. When the sewage and sludge are separated into solid and liquid by the centrifugal sludge discharge mechanism, flocculant can be added to the sewage. When the centrifuge drum 9 rotates, the multiple pairs of stirring blades 19 on the mounting rod 15 can stir the sewage and flocculant, so that the flocculant and sewage are fully mixed, thereby effectively improving the flocculation effect of the flocculant.

[0039] The scraper 16 is stepped, with its top diameter corresponding to the inner diameter of the centrifuge cylinder 9. The scraper brush 17 is annular, with its inner and outer diameters corresponding to the bottom diameter of the scraper 16 and the inner diameter of the centrifuge cylinder 9, respectively. The edges of both the scraper 16 and the scraper brush 17 can be attached to the inner wall of the centrifuge cylinder 9, preventing sewage and sludge from seeping through the gap between the scraper 16 and the centrifuge cylinder 9 and depositing at the bottom of the centrifuge cylinder 9. At the same time, the scraper brush 17 can fully contact the sludge adhering to the inner wall of the centrifuge cylinder 9 and the surface of the filter screen 11, thereby ensuring that the sludge can be cleaned and effectively avoiding residue.

[0040] The scraper blade 16 has a mounting groove 20 at the center of its top surface. The mounting groove 20 is circular and its diameter is equal to that of the mounting rod 15. The groove wall of the mounting groove 20 and the rod body of the mounting rod 15 are respectively provided with matching internal and external threads. The mounting rod 15 can be threaded into the mounting groove 20 so that the scraper blade 16 can be fixed to the mounting rod 15 by means of threaded connection. After the scraping mechanism has been used for a long time, the scraper brush 17 can be cleaned regularly by unscrewing the scraper blade 16. The scraper blade 16 can also be easily replaced in time when it is worn.

[0041] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0042] All standard parts used in the application documents can be purchased from the market. All components in this application documents can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art.

[0043] The working principle of this utility model is as follows:

[0044] In use, this invention introduces wastewater containing sludge and flocculant into centrifuge drum 9. Then, the electric telescopic rod 12 is driven to move the top cover 13, along with the entire sludge scraping mechanism, downwards until the top cover 13 covers the top of the sludge discharge chamber 3. Next, the motor 8 is driven to rotate centrifuge drum 9. At this point, the sludge in the wastewater is thrown against the inner wall of centrifuge drum 9 under centrifugal force, forming a sludge layer. The wastewater can then pass through the filter screen 11 and various drain outlets 10 and be discharged from centrifuge drum 9. The discharged wastewater collects at the bottom of sludge discharge chamber 3. By opening the drain valve 7, the wastewater can be discharged along the drain pipe 6, achieving solid-liquid separation of wastewater and sludge. Compared to natural sedimentation, this sludge discharge device has higher sludge discharge efficiency and a shorter processing cycle, effectively meeting the needs of large-scale wastewater sludge discharge. When the centrifuge drum 9 rotates, the multiple pairs of stirring blades 19 on the mounting rod 15 can stir the sewage and flocculant, so that the flocculant and sewage are fully mixed, thereby effectively improving the flocculation effect of the flocculant. After the sludge discharge device has been used for a long time, the electric telescopic rod 12 can be driven to move the top cover 13, the mounting rod 15 and the scraper 16 upward together. When the scraper 16 moves upward, the scraper brush 17 can scrape along the inner wall of the centrifuge drum 9 and the surface of the filter screen 11 in each drain outlet 10, so as to clean the sludge adhering to the inner wall of the device, thereby effectively preventing sludge accumulation and blockage. After the scraper mechanism has been used for a long time, the scraper brush 17 can be cleaned regularly by unscrewing the scraper 16, and the scraper 16 can be easily replaced when it is worn.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sludge removal device for wastewater treatment, characterized in that, The device includes a base, a fixed frame fixedly connected to the top of the base, a sludge discharge chamber above the base, several support legs fixedly connected to the bottom of the sludge discharge chamber, the bottom of the support legs fixedly connected to the base, a bracket fixedly connected to the bottom of the sludge discharge chamber, a drain pipe with a drain valve installed on the drain pipe, a centrifugal sludge discharge mechanism on the bracket, and a sludge scraping mechanism on the fixed frame. The centrifugal sludge discharge mechanism includes a motor, which is mounted on a bracket. The top of its output shaft passes through the bottom of the sludge discharge chamber and is fixedly connected to a centrifugal cylinder. The centrifugal cylinder is located inside the sludge discharge chamber, and its bottom wall has several drainage ports. Each drainage port is equipped with a filter screen. The sludge scraping mechanism includes an electric telescopic rod, which is installed on the top of the fixed frame. A top cover is fixedly connected to the bottom of the output shaft. A sealing block is fixedly connected to the bottom of the top cover. An installation rod is fixedly connected to the center of the bottom of the sealing block. A sludge scraper is installed at the bottom of the installation rod. The sludge scraper is circular and has a layer of sludge scraping brushes at its edge.

2. The sludge removal device for wastewater treatment according to claim 1, characterized in that, The centrifuge tube is cylindrical with an open top that slopes outward. The drain outlet is rectangular and is distributed in an equidistant ring along the circumference of the centrifuge tube, with the bottom of the drain outlet located above the scraper.

3. The sludge removal device for wastewater treatment according to claim 1, characterized in that, The sludge discharge bin is circular, and a water guide block is fixedly connected to its bottom. The water guide block is frustum-shaped with inclined end faces on its side walls, and a through hole is opened at the center of the water guide block. The bottom of the connection between the drain pipe and the sludge discharge bin is flush with the bottom surface of the water guide block.

4. A sludge removal device for wastewater treatment according to claim 1, characterized in that, The sealing block has a circular cross-section, and its diameter is equal to the inner diameter of the sludge discharge chamber.

5. A sludge removal device for wastewater treatment according to claim 1, characterized in that, The mounting rod has several pairs of stirring blades fixedly connected to its body. Each pair of stirring blades is symmetrically distributed, and each pair of stirring blades is linearly distributed at equal intervals along the axial direction of the mounting rod.

6. A sludge removal device for wastewater treatment according to claim 1, characterized in that, The scraper blade is stepped, with its top diameter corresponding to the inner diameter of the centrifuge cylinder. The scraper brush is annular, with its inner and outer diameters corresponding to the bottom diameter of the scraper blade and the inner diameter of the centrifuge cylinder, respectively.

7. A sludge removal device for wastewater treatment according to claim 1, characterized in that, The top surface of the scraper blade has a mounting groove at its center. The mounting groove is circular and its diameter is equal to that of the mounting rod. The groove wall and the rod body are respectively provided with mating internal and external threads.

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