A sedimentation pond structure and design method for dredging mud sediment separation

Abstract

The present invention discloses a mud storage tank structure and a design method for dredging mud sediment separation, belonging to the technical field of dredging sludge separation. The mud storage tank structure for dredging mud sediment separation includes a mud storage tank body. A plurality of groups of filtering components are arranged inside the mud storage tank body. Each group of the filtering components includes a filter screen, and the filter screen precisions in the plurality of groups of filtering components are different. The internal space of the mud storage tank body is divided into several accommodating spaces by the plurality of groups of filtering components, and the depths of the respective accommodating spaces are different. The present invention realizes the filtration and separation of dredging sludge, increases the drainage efficiency, can also clean the filter screen quickly and conveniently, ensures the long-term use of the mud storage tank, and also maximally exerts the volume of the mud storage tank.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of dredged silt separation, and specifically provides a mud storage tank structure and design method for dredged mud sediment separation. Background Art

[0002] Dredged silt is the waste generated by dredging projects such as port construction, waterway dredging, and river and lake treatment. Due to the limitations of dredging technology, the dredged soil produced by dredging projects is usually a mixture of mud and water. In engineering construction, mud storage tanks are usually used to store and manage the mud-water mixture generated by dredging. A mud storage tank is a hydraulic structure artificially set up to store dredged silt. In order to facilitate the storage and disposal of dredged silt, mud storage tanks often have a large floor area and are close to the dredging operation area. The water content of the mud-water mixture entering the mud storage tank often exceeds 200% and cannot be directly used in engineering construction. An important function of the mud storage tank is the natural dehydration of dredged silt. After dehydration in the mud storage tank, the volume of dredged silt is greatly reduced, and the soil quality can meet the requirements of engineering construction.

[0003] In traditional processes, dredged silt is sent into the interior of the mud storage tank through a mud injection pipe. The mud storage tank mainly achieves dehydration by setting drainage outlets, natural evaporation, and filter screen filtration. The discharged water is purified to meet the discharge standards. However, the dehydration efficiency of dredged silt in traditional processes is low, and there are different degrees of silt such as mud and sediment in the dredged silt. The mud storage tank cannot separate them, increasing the process flow. Summary of the Invention

[0004] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem of the overly single solution of the prior art. It mainly provides a mud storage tank structure and design method for dredged mud sediment separation to solve the technical problems mentioned in the above background art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0006] A mud storage tank structure for dredged mud sediment separation includes a mud storage tank body. A plurality of groups of filtering components are arranged inside the mud storage tank body. Each group of filtering components includes a filter screen, and the filter screen precisions in the plurality of groups of filtering components are different. The internal space of the mud storage tank body is divided into several accommodation spaces by the plurality of groups of filtering components, and the depths of the respective accommodation spaces are different; each group of filtering components includes an upper guide bar and a lower guide bar. The upper guide bar is installed at the upper end of the filter screen, the lower guide bar is slidably connected to the lower end of the filter screen, partition components are arranged on both the left and right sides of the filter screen, the filter screens are connected end to end, and the left and right ends are respectively placed inside the partition components. A cleaning component is arranged inside the partition components.

[0007] Preferably, a cofferdam is provided around the sludge sump body. The cleaning member includes flush pipes provided at both ends of each accommodation space inside the sludge sump body, and the nozzles of the flush pipes are all located inside the partition assembly.

[0008] Preferably, a mud injection pipe and a drain outlet are provided on the sludge sump body. Multiple groups of the filtering members are all located between the mud injection pipe and the drain outlet. The mesh number of the filter screen increases continuously from the side of the mud injection pipe to the drain outlet side, and the depth of the accommodation space becomes deeper continuously from the side of the mud injection pipe to the drain outlet side.

[0009] Preferably, the partition assembly includes upper and lower fixing frames. A water filter screen is connected between the upper and lower fixing frames. A through groove is provided at the center of the partition assembly. Wear-resistant extrusion strips are installed on the inner wall of the through groove. A number of fixing rods are installed inside the partition assembly. Guide sleeves are sleeved on some of the fixing rods, and the filter screen is in sliding contact with the guide sleeves.

[0010] Preferably, the lower guide strip is buried at the bottom of the sludge sump body and located between two partition assemblies. The filter screen inside the lower guide strip is provided with two layers and is in close contact. A track strip that is slidably connected to the lower end of the filter screen is provided at the lower end inside the partition assembly. Tooth grooves are provided on the outer side wall of the upper guide strip. A positioning frame is provided inside one of the partition assemblies on both sides of the same filter screen, and a motor is installed on the positioning frame. The output end of the motor is connected to a gear, and the gear is meshed with the tooth grooves.

[0011] Preferably, a sliding frame is provided inside one of the partition assemblies on both sides of the same filter screen. Both ends of the sliding frame are connected to two of the fixing rods, and the sliding frame is in sliding contact with the inner side wall of the upper guide strip. The cleaning member further includes cleaning brush sleeves installed on the remaining fixing rods, and the cleaning brush sleeves are in contact with the filter screen.

[0012] A design method for a sludge sump structure for dredging mud sediment sorting, designed by using the above sludge sump structure for dredging mud sediment sorting, includes the following steps:

[0013] S1. Take a certain amount of dredged mud as a sample, weigh its mass and record it as M.

[0014] S2. Arrange three groups of filter screens in sequence according to the precision. Then filter and sort the dredged mud sample through several filter screens [the minimum number of filter screens is one group, and three groups of filter screens are taken as an example here]. After the sample dredged mud is completely filtered, the substances separated by filtering the three groups of filter screens are respectively recorded as substance 1, substance 2, substance 3 and water, and they are weighed in sequence and recorded as m1, m2, m3, m4.

[0015] S3. Measure the volume of the sludge collecting tank body and divide the interior of the sludge collecting tank body into four accommodation spaces. The four accommodation spaces correspond to accommodating substance 1, substance 2, substance 3, and water, respectively. The volume ratio of the four accommodation spaces is m1 / M:m2 / M:m3 / M:m4 / M.

[0016] S4. According to the divided accommodation space, the filter element, the partition assembly, the cleaning element and other components are installed inside the mud receiving tank body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The dredged silt is discharged into the mud receiving pool through the mud injection pipe. Since the depth of the accommodation space becomes deeper from the mud injection pipe to the drainage outlet, the bottom of the mud receiving pool is stepped. Therefore, the dredged silt moves continuously under the action of gravity and then passes through multiple sets of filter screens for filtration and sorting. Since the mesh size of the filter screen increases from the mud injection pipe to the drainage outlet, the accuracy of the filter screen that the dredged silt contacts also increases, thus achieving the filtration and sorting of the dredged silt, and the discharged water is discharged through the drainage outlet. Multi-stage screening can not only achieve the filtration and sorting of the dredged silt, reduce the subsequent process flow of dredged silt processing, but also avoid the problem that the mud and sediment are easily mixed together and the water inside cannot be discharged;

[0019] (2) By driving the filter to move, the filter contacts the cleaning brush sleeve while moving, achieving cleaning. Due to the obstruction of the water filter, the cleanliness of the interior of the partition assembly is guaranteed. At the same time, the flushing pipe sprays water to clean the filter and the water filter, while avoiding mud accumulation in the dead corners of the accommodation space. In addition, due to the movement of the filter, the silt on the filter will be moved, increasing the internal fluidity and avoiding the accumulation of silt, which affects the filtering and drainage efficiency of the filter.

[0020] (3) A design method for the mud pool structure is provided. By collecting mud samples and analyzing them, the proportional relationship between the particle size components is obtained. Then, the area of different step regions is divided according to the proportional relationship of different components, and the distance between each step is set to maximize the volume of the mud pool.

[0021] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the top view of the mud receiving pool body of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the partition assembly of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal top view of the fixing frame of the present invention;

[0025] Figure 4 This is a schematic side view structure diagram of the filter screen of the present invention;

[0026] Figure 5 This is a schematic side view structure diagram of the bottom of the sludge sump body of the present invention.

[0027] Description of the drawings: 1. Sludge sump body; 11. Mud injection pipe; 12. Drainage port; 13. Flushing water pipe; 14. Cofferdam; 2. Filter element; 21. Filter screen; 22. Upper guide bar; 23. Lower guide bar; 24. Tooth groove; 25. Motor; 26. Gear; 27. Sliding frame; 3. Partition assembly; 31. Fixed frame; 32. Filter water net; 33. Wear-resistant extrusion bar; 34. Fixed rod; 35. Guide sleeve; 36. Cleaning brush sleeve; 37. Penetrating groove. Detailed implementation manners

[0028] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Please refer specifically to the attached Figure 1 and 5, the present invention provides a technical solution: a mud storage tank structure for dredging mud sediment separation, including a mud storage tank body 1. A plurality of filter elements 2 are arranged inside the mud storage tank body 1. Each group of the filter elements 2 includes a filter screen 21, and the precisions of the filter screens 21 in the plurality of groups of filter elements 2 are different. The internal space of the mud storage tank body 1 is divided into several accommodation spaces by the plurality of filter elements 2, and the depths of the respective accommodation spaces are different. A mud injection pipe 11 and a drain port 12 are provided on the mud storage tank body 1. The plurality of filter elements 2 are all located between the mud injection pipe 11 and the drain port 12. The mesh number of the filter screen 21 continuously increases from the side of the mud injection pipe 11 to the drain port 12, and the depth of the accommodation space continuously becomes deeper from the side of the mud injection pipe 11 to the drain port 12.

[0032] The dredged sludge is discharged into the inside of the mud storage tank body 1 through the mud injection pipe 11. Since the depth of the accommodation space continuously becomes deeper from the side of the mud injection pipe 11 to the drain port 12 and the bottom of the mud storage tank body 1 is stepped, the dredged sludge continuously moves under the action of gravity and then is filtered and separated through a plurality of filter screens 21. Since the mesh number of the filter screen 21 continuously increases from the side of the mud injection pipe 11 to the drain port 12, the precision of the filter screen 21 contacted by the dredged sludge also continuously increases, realizing the filtration and separation of the dredged sludge. The discharged water is discharged through the drain port 12. The multi-stage screening can not only realize the filtration and separation of the dredged sludge, reduce the subsequent processing technological process of the dredged sludge, but also avoid the problem that the mud and sediment are easily agglomerated together, resulting in the inability to discharge the water inside.

[0033] Please refer specifically to the attached Figures 1-4, each group of the filter elements 2 includes an upper guide bar 22 and a lower guide bar 23, the upper guide bar 22 is installed on the upper end of the filter screen 21, the lower guide bar 23 is slidably connected to the lower end of the filter screen 21, and a partition assembly 3 is provided on both sides of the filter screen 21. The partition assembly 3 includes an upper and lower fixing frame 31, and a water filter net 32 is connected between the upper and lower fixing frames 31. The accuracy of the water filter net 32 can be consistent with the accuracy of the filter screen 21 with the smallest accuracy. A penetration groove 37 is opened in the center of the partition assembly 3, and a wear-resistant extrusion strip 33 is installed on the inner wall of the penetration groove 37. The filter screen 21 is connected end to end and the left and right ends are respectively placed inside the partition assembly 3, and the partition assembly 3 is installed inside. Several fixing rods 34, some of which are provided with guide sleeves 35, the filter screen 21 and the guide sleeve 35 are in sliding contact, the lower guide bar 23 is buried in the bottom of the mud tank body 1 and is located between the two partition components 3, the filter screen 21 inside the lower guide bar 23 is set to two layers and in close contact, the lower end of the partition component 3 is provided with a track bar that is slidably connected to the lower end of the filter screen 21, and the outer wall of the upper guide bar 22 is provided with a tooth groove 24, and one of the partition components 3 on both sides of the same filter screen 21 is provided with a positioning frame, and a motor 25 is installed on the positioning frame, and the output end of the motor 25 is connected to a gear 26, and the gear 26 is meshed with the tooth groove 24.

[0034] The motor 25 starts and drives the gear 26 to rotate. Since the gear 26 is engaged with the tooth groove 24, the upper guide bar 22 is driven to move, so that the filter screen 21 moves. While moving, the filter screen 21 contacts the cleaning brush cover 36 to achieve cleaning. Due to the obstruction of the water filter screen 32, the cleanliness of the interior of the partition assembly 3 is guaranteed. At the same time, the flushing pipe 13 sprays water to clean the filter screen 21 and the water filter screen 32, and avoids mud accumulation in the dead corners of the accommodation space. In addition, due to the movement of the filter screen 21, the silt against the filter screen 21 will be moved, which increases the internal fluidity and avoids the silt from accumulating together, affecting the filtering and drainage efficiency of the filter screen 21.

[0035] After the filter screen 21 is stabilized, the filter screen 21 located between the two partition components 3 is overlapped and stacked. At this time, it should be ensured that the filter screens 21 are overlapped and stacked, and their filter holes are relative to each other to avoid overlapping of the filter holes and affecting the size of the filter holes. The motor 25 is started at regular intervals (the interval time can be set to 5-40 minutes). The motor 25 drives the filter screen 21 to move the same distance each time, and after the filter screen 21 moves, the filter holes on the overlapping filter screens 21 are still relative. The interval start-up and output frequency of the motor 25 are kept consistent, which can be achieved by adding a controller. The controller control circuit can be realized by simple programming by technicians in this field. It is common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection are not described in detail.

[0036] Please refer to the attached Figures 1-4, one of the partition components 3 on both sides of the same filter screen 21 is internally provided with a sliding frame 27. Both ends of the sliding frame 27 are connected to two of the fixed rods 34, and the sliding frame 27 is slidably connected to the inner side wall of the upper guide bar 22. The sliding frame 27 is used to increase the stability of the upper guide bar 22 and avoid the stable meshing between the gear 26 and the tooth groove 24.

[0037] A cofferdam 14 is arranged around the sludge sump body 1. A cleaning member is arranged inside the partition component 3. The cleaning member includes flushing pipes 13 provided at both ends of each accommodation space inside the sludge sump body 1, and the nozzles of the flushing pipes 13 are all located inside the partition component 3. The cleaning member further includes cleaning brush sleeves 36 installed on the remaining fixed rods 34, and the cleaning brush sleeves 36 are in contact with the filter screen 21. During the movement of the filter screen 21, the filter screen 21 is in contact with the cleaning brush sleeves 36 to clean the filter screen 21. The flushing pipes 13 spray water to clean the filter screen 21 and the water filter screen 32, and at the same time avoid mud accumulation at the dead corners of the accommodation space.

[0038] The following are the design method steps of a sludge sump structure for dredging mud sediment separation:

[0039] S1. Take a certain amount of dredged mud as a sample, weigh its mass and record it as M;

[0040] S2. Arrange three groups of filter screens in sequence according to the precision, and then filter and separate the dredged mud sample through several filter screens [the minimum number of filter screens is one group, and three groups of filter screens are taken as an example here]. After the sample dredged mud is completely filtered, the substances separated by the three groups of filter screens 21 are respectively recorded as substance 1, substance 2, substance 3 and water, and they are weighed in sequence and recorded as m1, m2, m3, m4;

[0041] S3. Measure the volume of the sludge sump body, divide the inside of the sludge sump body into four accommodation spaces, and the four accommodation spaces respectively correspond to accommodating substance 1, substance 2, substance 3 and water, and the volume ratio of the four accommodation spaces is m1 / M∶m2 / M∶m3 / M∶m4 / M;

[0042] S4. According to the divided accommodation spaces, install components such as the filtering member, the partition component and the cleaning member inside the sludge sump body.

[0043] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as this non-substantial improvement is made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A mud storage pond structure for dredging mud sediment separation, comprising a mud storage pond body (1), characterized in that: Inside the sludge storage tank body (1), there are multiple groups of filter components (2). Each group of the filter components (2) includes a filter screen (21), and the precisions of the filter screens (21) in multiple groups of the filter components (2) are different. The internal space of the sludge storage tank body (1) is divided into several accommodation spaces by multiple groups of filter components (2), and the depths of the respective accommodation spaces are different; Each group of the filter components (2) includes an upper guide bar (22) and a lower guide bar (23). The upper guide bar (22) is installed at the upper end of the filter screen (21), and the lower guide bar (23) is slidably connected to the lower end of the filter screen (21). Partition components (3) are arranged on both the left and right sides of the filter screen (21). The filter screen (21) is connected end to end, and the left and right ends are respectively placed inside the partition components (3). A cleaning component is arranged inside the partition components (3); A sludge injection pipe (11) and a drain outlet (12) are arranged on the sludge storage tank body (1). Multiple groups of the filter components (2) are all located between the sludge injection pipe (11) and the drain outlet (12). The mesh number of the filter screen (21) continuously increases from the side of the sludge injection pipe (11) to the side of the drain outlet (12), and the depth of the accommodation space continuously becomes deeper from the side of the sludge injection pipe (11) to the side of the drain outlet (12); The partition component (3) includes upper and lower fixing frames (31). A water filtering net (32) is connected between the upper and lower fixing frames (31). A penetration groove (37) is formed in the center of the partition component (3). Wear-resistant extrusion strips (33) are installed on the inner wall of the penetration groove (37). Several fixing rods (34) are installed inside the partition component (3). Guide sleeves (35) are sleeved on some of the fixing rods (34). The filter screen (21) is in sliding contact with the guide sleeves (35); The lower guide bar (23) is buried at the bottom of the sludge storage tank body (1) and is located between two partition components (3). The filter screen (21) inside the lower guide bar (23) is provided with two layers and is in close contact. A track bar that is slidably connected to the lower end of the filter screen (21) is arranged at the lower end inside the partition component (3). Tooth grooves (24) are arranged on the outer side wall of the upper guide bar (22). A positioning frame is arranged inside one of the partition components (3) on both sides of the same filter screen (21), and a motor (25) is installed on the positioning frame. The output end of the motor (25) is connected with a gear (26), and the gear (26) is meshed with the tooth grooves (24); A sliding frame (27) is arranged inside one of the partition components (3) on both sides of the same filter screen (21). Both ends of the sliding frame (27) are connected with two of the fixing rods (34), and the sliding frame (27) is in sliding connection with the inner side wall of the upper guide bar (22). The cleaning component further includes cleaning brush sleeves (36) installed on the remaining fixing rods (34), and the cleaning brush sleeves (36) are in contact with the filter screen (21).

2. The mud storage tank structure for dredging mud sediment separation according to claim 1, characterized in that: A cofferdam (14) is arranged around the sludge storage tank body (1). The cleaning component includes flush pipes (13) arranged at both ends of each accommodation space inside the sludge storage tank body (1), and the pipe orifices of the flush pipes (13) are all located inside the partition components (3).

3. A design method for the structure of a mud storage pond for dredging mud sediment separation, characterized in that, Design is carried out by using a sludge storage tank structure for dredging mud sediment separation described in any one of claims 1-2, including the following steps: S1. Take a certain amount of dredging mud as a sample, weigh its mass and record it as M; S2. Arrange three groups of filter meshes (21) in sequence according to precision, then filter and separate the dredging mud sample through several filter meshes (21). After the sample dredging mud is completely filtered, the substances separated by filtering the three groups of filter meshes (21) are respectively recorded as substance 1, substance 2, substance 3 and water, and weigh them in sequence, and record them as m1, m2, m3, m4 respectively; S3. Measure the volume of the sludge storage tank body (1), divide the inside of the sludge storage tank body (1) into four accommodation spaces, the four accommodation spaces respectively correspond to accommodating substance 1, substance 2, substance 3 and water, and the volume ratio of the four accommodation spaces is m1 / M∶m2 / M∶m3 / M∶m4 / M; S4. Install the filter element (2), the partition component (3) and the cleaning component into the inside of the sludge storage tank body (1) according to the divided accommodation spaces.

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