A dewatering-curing-conveying integrated device applied to environment-friendly dredging slurry

Abstract

The application provides a dewatering-curing-conveying integrated device applied to environment-friendly dredging slurry, and the whole pipeline is connected between a slurry lifting pump pipe section and a subsequent pipe section in a slurry temporary storage pool to convey the slurry and form a treatment state at the same time, so that the slurry is cured and discharged, and the whole pipeline comprises a dewatering section pipeline and a curing section pipeline; a first mixing pipeline is arranged in the dewatering section pipeline, the first mixing pipeline is communicated with the slurry lifting pump pipe section, a flocculation pipeline and a dewatering pipeline are sequentially connected downstream of the first mixing pipeline, a second mixing pipeline connected with the dewatering pipeline is arranged in the curing section pipeline; and mixing sections are arranged in the first mixing pipeline and the second mixing pipeline. In the slurry conveying process with high water content, slurry dewatering and slurry curing are respectively carried out, dewatering-curing-conveying integration is realized, the amount of slurry transported by the pipeline is reduced, the slurry treatment site is reduced, and the investment cost is saved.

Description

Technical Field

[0001] This invention relates to the field of river, lake and reservoir dredging engineering technology, specifically to an integrated device for dewatering, solidifying and conveying environmentally friendly dredging sludge. Background Technology

[0002] River, lake, and reservoir dredging is a necessary means of improving water conservancy, environmental management, and increasing reservoir capacity. Currently, environmentally friendly dredging is the most common method, allowing for direct water-based operations with minimal disturbance to water quality and high efficiency. However, environmentally friendly dredging sludge has a high water content and large volume, requiring the construction of corresponding sludge treatment plants. Site limitations necessitate the transfer of sludge to other regions for treatment, significantly increasing dredging costs. Currently, environmentally friendly dredging often uses the hydraulic filling method with pipeline transportation, but pipeline transportation involves large volumes and long distances, resulting in high costs. Current treatment solutions all require the installation of mechanical dewatering equipment, transfer equipment, and solidification equipment to process the dredged sediment, requiring large land areas and incurring high intermediate transfer costs, making it difficult to meet the ever-increasing dredging needs. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated dehydration-solidification-transportation device that reduces transportation costs and processing land use.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] An integrated dewatering-solidification-transportation device for environmentally friendly dredging sludge is disclosed. The overall pipeline connects to the sludge lift pump section and subsequent pipe sections in a sludge temporary storage tank, simultaneously transporting and processing the sludge to solidify it before discharge. The overall pipeline includes a dewatering section and a solidification section. A first mixing pipe is installed within the dewatering section, connected to the sludge lift pump section, and its downstream end is connected to a flocculation pipe and a dewatering pipe. A second mixing pipe, connected to the dewatering pipe, is installed within the solidification section. Both the first and second mixing pipes have mixing sections. A flocculant injector and its outlet pipe section are connected upstream of the first mixing pipe. A filtration unit is installed inside the dewatering pipe, and a drainage unit connected to the outside is located in the filtration unit area. A solidifying agent injector is connected upstream of the second mixing pipe in the solidification section.

[0006] Furthermore, the outlet pipe section of the flocculant injector is located at the end of the mud lift pump pipe section.

[0007] Furthermore, the outlet pipe section of the flocculant injector is inclined and forms an angle with the direction of mud discharge.

[0008] Furthermore: the length of the flocculation pipeline is greater than or equal to % of the total length of the dewatering section pipeline.

[0009] Furthermore, the inner diameter of the flocculation pipe is 1.1-1.5 times the inner diameter of the first mixing pipe.

[0010] Furthermore, there is a gap between the outer wall of the filter unit and the inner wall of the dewatering pipe.

[0011] Furthermore, the initial pipe section of the filter unit is equipped with a first compressed air pump, which is connected to the interior of the filter unit through a first connecting pipe section, so that the first compressed air pump provides positive pressure to the flowing mud.

[0012] Furthermore, the filter unit has pores distributed on its tube wall and a filter layer is wrapped around the outside of the filter unit to prevent flocs from entering the drainage unit.

[0013] Furthermore, the curing agent injector is located at the end of the dehydration pipe and is spaced apart from the filter unit.

[0014] Furthermore, a second compressed air pump is connected to the pipe section between the curing agent injector and the mixing section inside the second mixing pipe to deliver the slurry.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention integrates dewatering and solidification processes during the transport of high-moisture-content mud, achieving a unified dewatering-solidification-transportation process. This reduces the amount of mud transported via pipeline, minimizes the need for mud treatment facilities, and saves on investment costs. Utilizing pipelines for treatment reduces the number of treatment devices and the required treatment space; furthermore, simultaneous dewatering and solidification during transport saves processing time. Additionally, the dewatering section of the pipeline significantly reduces the amount of mud pumped, effectively lowering transportation costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the pipeline structure of the dehydration section of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the filter unit of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the pipeline in the curing section of the present invention;

[0021] Figure 5 This is a schematic diagram of the process of the present invention.

[0022] The labels in the attached diagram are as follows: flocculant injector 1, first mixing pipe 2, flocculation pipe 3, first compressed air pump 4, dehydration pipe 5, filter unit 51, pore 511, drainage unit 52, curing agent injector 6, second mixing pipe 7, second compressed air pump 8, dehydration section pipe 9, curing section pipe 10. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0024] like Figure 1-5 As shown, an integrated dewatering-solidification-transporting device for environmentally friendly dredging sludge is disclosed. The overall pipeline connects the sludge lifting pump section in the sludge temporary storage tank and subsequent pipeline sections to simultaneously transport and process the sludge, solidifying it before discharge. The overall pipeline includes a dewatering section pipeline 9 and a solidification section pipeline 10, which are interconnected. The dredging sludge first enters the dewatering section pipeline 9 for dewatering, and then enters the solidification section pipeline 10 for solidification. A first mixing pipeline 2 is installed within the dewatering section pipeline 9. 2 is connected to the mud lifting pump section, and its downstream is connected to the flocculation pipe 3 and the dewatering pipe 5 in sequence. The solidification section pipe 10 is equipped with a second mixing pipe 7 connected to the dewatering pipe 5. Both the first mixing pipe 2 and the second mixing pipe 7 are equipped with mixing sections. The upstream of the first mixing pipe 2 is connected to the flocculant injector 1 and its outlet pipe section. The dewatering pipe 5 is equipped with a filter unit 51. The dewatering pipe 5 is equipped with a drainage unit 52 connected to the outside in the area of ​​the filter unit 51. The solidification section pipe 10 is connected to the solidifying agent injector 6 upstream of the second mixing pipe 7.

[0025] Specifically, the mixing section within the mixing pipeline can be an inclined tube slurry mixing process, a W-tube, a cylindrical container, a pneumatic mixer, or other pipelines that promote slurry mixing within the pipeline. In this embodiment, the mixing section within the mixing pipeline adopts an inclined plate promoting type (e.g., Figure 3 and Figure 4 (As shown).

[0026] like Figure 1-2 As shown, specifically, the outlet pipe section of the flocculant injector 1 is located at the end of the mud lift pump pipe section. The outlet pipe section of the flocculant injector 1 is inclined, forming an angle with the mud discharge direction. Preferably, the outlet direction of the outlet pipe section of the flocculant injector 1 is directly opposite the mixing section inside the first mixing pipe 2, making the injection of flocculant from the injector 1 smoother. Simultaneously, solid flocculants or liquid flocculants are selected according to actual needs.

[0027] Specifically, the flocculation pipe 3 is the main operating section of the dewatering section pipe 9. The length of the flocculation pipe 3 is greater than or equal to 80% of the total length of the dewatering section pipe 9. In this embodiment, the length of the flocculation pipe 3 is preferably 80% of the total length of the dewatering section pipe 9. Depending on the specific pumping distance, a mud pump is added to the flocculation pipe 3. At the same time, the length of the first mixing pipe 2 should be less than 5% of the total length of the dewatering section.

[0028] The inner diameter of the flocculation pipe 3 is 1.1-1.5 times the inner diameter of the first mixing pipe 2, preferably 1.5 times the inner diameter of the first mixing pipe 2.

[0029] like Figure 1-2 As shown, in this embodiment, the inner diameter of the dewatering pipe 5 is consistent with that of the flocculation pipe 3, and the length of the dewatering pipe 5 should be more than 5% of the total length of the dewatering section pipe 9.

[0030] Specifically, there is a gap between the outer wall of the filter unit 51 and the inner wall of the dewatering pipe 5. It should be noted that the inner diameter of the filter unit 51 should be 0.4-0.8 times the inner diameter of the flocculation pipe 3, and preferably 0.5 times the inner diameter of the flocculation pipe 3, in order to enhance the filtration effect. At the same time, a frustum-shaped guide pipe section is provided between the end of the filter unit 51 and the inner wall of the dewatering pipe 5.

[0031] The filter unit 51 has pores 511 distributed on its pipe wall, and a filter layer is wrapped around the outside of the filter unit 51. In this embodiment, the filter layer is made of filter cloth to prevent lint from entering the drainage unit 52. The drainage unit 52 may have a drainage pipe installed on the section of its pipe extending out of the dewatering pipe 5, and the drainage pipe is connected to the sewage receiving pipe.

[0032] The filter unit 51 is equipped with a first compressed air pump 4 in the initial pipe section. The first compressed air pump 4 is connected to the inside of the filter unit 51 through a first connecting pipe section, but is not directly connected to the drainage unit 52, so that the first compressed air pump 4 provides positive pressure to the mud flowing through it.

[0033] like Figure 1 and 4 As shown, in this embodiment, the length of the second mixing pipe 7 depends on the unit volume of mud. Since the second mixing pipe 7 is connected to the subsequent ordinary pipe, a compressed air pump can be installed in both the second mixing pipe 7 and the subsequent ordinary pipe to assist in pumping the solidified mud, depending on the transportation distance of the second mixing pipe 7. The compressed air operation mode adopts the blow-fill pumping method.

[0034] Specifically, the curing agent injector 6 is located at the end of the dehydration pipe 5 and is spaced apart from the filter unit 51.

[0035] A second compressed air pump 8 is connected to the pipe section between the chemical injector 6 and the mixing section inside the second mixing pipe 7. The second compressed air pump 8 is preferably located in the initial pipe section of the second mixing pipe 7 and upstream of the mixing section inside the second mixing pipe 7, so that the mud can be fed into the second mixing pipe 7 more smoothly.

[0036] In this embodiment, the water content of the environmentally friendly dredging slurry is above 570%, while the water content of the slurry flowing through and leaving the dewatering section pipe 9 needs to be reduced to between 95-110% to meet the needs of the solidification section pipe 10. Finally, after the dewatered slurry passes through the solidification section pipe 10, it can be directly used as fill material, soil material, etc.

[0037] Please see Figure 1-5 When using the integrated dehydration-solidification-conveying device, the specific method is as follows:

[0038] First, based on the dredging volume, dredging area, surrounding land, and mud transportation distance, determine the specific location of the temporary storage site and the specific purpose of the solidified mud. Then, determine the length of the delivery pipeline based on the dredging site layout.

[0039] Based on the specific application of the solidified slurry and the length of the conveying pipeline, determine the types of flocculant and curing agent to be used, and determine the model and specifications of the flocculant injector 1 and the curing agent injector 6 to be used.

[0040] Based on the types of flocculants and curing agents used and the amount of slurry per unit time, the lengths of pipe 9 in the dewatering section and pipe 10 in the curing section are determined respectively. The lengths of pipe 2 in the mixing section, pipe 3 in the flocculation section, and pipe 5 in the dewatering section are further determined.

[0041] Based on the length of each pipeline, determine the operating mode, power, quantity, and installation location of the first compressed air pump 4 in the dehydration section pipeline 9 and the second compressed air pump 8 in the curing section pipeline 10.

[0042] After determining the key design parameters, the mixing pipe 2 at the head of the dewatering section pipe 9 is connected to the mud lifting pump in the mud storage tank. The environmentally friendly dredging mud is discharged into the dewatering section pipe 9 through the mud lifting pump. The flocculant is gradually injected, mixed, and interacts until it is dewatered and discharged into the solidification section pipe 10. A solidifying agent is added to the dewatered mud, and after mixing, the dewatered mud is solidified and discharged into the subsequent ordinary pipe until it is discharged into the target operation area through the subsequent ordinary pipe.

[0043] The above embodiments are merely preferred technical solutions of the present invention. Those skilled in the art should understand that modifications or substitutions to the technical solutions or parameters in the embodiments can be made without departing from the principles and essence of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. An integrated dewatering-solidification-transportation device for environmentally friendly dredging sludge, characterized in that: The overall pipeline connects the mud lifting pump section in the mud storage tank and the subsequent pipe sections to transport the mud and simultaneously process it, so that it is solidified and discharged. The overall pipeline includes a dewatering section pipeline (9) and a solidification section pipeline (10). A first mixing pipeline (2) is set in the dewatering section pipeline (9), which is connected to the mud lifting pump section. Downstream of the first mixing pipeline (2) it is connected to the flocculation pipeline (3) and the dewatering pipeline (5). A second mixing pipeline (7) connected to the dewatering pipeline (5) is set in the solidification section pipeline (10). Both the first mixing pipeline (2) and the second mixing pipeline (7) are equipped with mixing sections. The first mixing pipe (2) is connected to a flocculant injector (1) and its outlet pipe section upstream. The dewatering pipe (5) is equipped with a filter unit (51) inside. The dewatering pipe (5) is equipped with a drainage unit (52) connected to the outside in the area of ​​the filter unit (51). The solidification section pipe (10) is connected to a solidifying agent injector (6) upstream of the second mixing pipe (7). The outlet pipe section of the flocculant injector (1) is located at the end of the mud lifting pump pipe section; The outlet pipe section of the flocculant injector (1) is inclined and forms an angle with the mud discharge direction; The length of the flocculation pipe (3) is greater than or equal to 80% of the total length of the dewatering section pipe (9); The inner diameter of the flocculation pipe (3) is 1.1-1.75 times the inner diameter of the first mixing pipe (2); There is a gap between the outer wall of the filter unit (51) and the inner wall of the dehydration pipe (5); The initial pipe section of the filter unit (51) is equipped with a first compressed air pump (4), which is connected to the inside of the filter unit (51) through a first connecting pipe section so that the first compressed air pump (4) provides positive pressure to the mud flowing through it.

2. The integrated dewatering-solidification-transportation device for environmentally friendly dredging sludge as described in claim 1, characterized in that: The filter unit (51) has pores (511) distributed on its pipe wall, and a filter layer is wrapped around the outside of the filter unit (51) to prevent flocs from entering the drainage unit (52).

3. The integrated dewatering-solidification-transportation device for environmentally friendly dredging sludge as described in claim 1, characterized in that: The curing agent injector (6) is located at the end of the dehydration pipe (5) and is spaced apart from the filter unit (51).

4. The integrated dewatering-solidification-transportation device for environmentally friendly dredging sludge as described in claim 1, characterized in that: A second compressed air pump (8) is connected to the pipe section between the curing agent injector (6) and the mixing section of the second mixing pipe (7) to deliver the slurry.

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