Road system for zoned in-situ sludge treatment in sludge burying and filling field

Abstract

The utility model provides a road system for zoned in-situ sludge treatment in a sludge burying and filling field, belongs to the field of sludge treatment, and is used for solving the problem that a temporary road is sunken and collapsed due to infiltration of percolate during in-situ sludge treatment in the prior art. Comprising a leachate collecting area, a plurality of first roads arranged at intervals in the first direction, a plurality of second roads arranged at intervals in the second direction and a plurality of inspection wells. The first road and the second road are communicated to divide the landfill into a plurality of landfill subareas, and each landfill subarea can be used for independently treating sludge, so that targeted treatment can be carried out according to the source and the property of the sludge in different areas; the percolate in the burying and filling subareas is discharged to the percolate collecting area through the percolate flow guide layer, the first flow guide pipe and the second flow guide pipe which are arranged at the bottom of the road, the situation that the percolate is collected in the burying and filling subareas and the bottom of the road, consequently, the road is sunken and collapsed is avoided, and secondary environmental pollution caused by the percolate can also be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of sludge treatment, and in particular relates to a road system for in-situ sludge treatment in zoning within a sludge landfill. Background Technology

[0002] In recent years, with the continuous acceleration of urbanization in my country, the scale of cities and the number of people have continued to expand, and the volume of sewage treatment has shown a continuous upward trend. Along with the large-scale generation and treatment of various types of sewage, sludge production has also continued to increase. Studies have shown that sewage treatment plants can produce 5-10 tons of sludge with a water content of 80% for every 10,000 tons of sewage treated. Sludge is characterized by its large production volume, high water content, easy putrefaction, and foul odor, and it contains more than 50% of the pollutants in the sewage. If not properly treated, it will cause serious damage to the water environment and soil.

[0003] Sludge landfill, once the primary method for municipal sludge treatment in my country, has solved the sludge disposal problem to some extent, but it is now insufficient to meet the ever-increasing volume of sludge. The poor stability of urban sludge and the difficulty of dewatering are also significant constraints on its application. Furthermore, the leachate from landfills easily causes secondary pollution to the surrounding environment. With the continuous expansion of urban construction areas and the increasing scarcity of land resources, sludge landfills not only occupy a large amount of land but also severely restrict the planning and development of surrounding areas.

[0004] In light of this, in-situ treatment of sludge already buried in existing sludge landfills is gradually becoming a new trend in the field of sludge disposal. Before in-situ treatment at sludge landfills, temporary roads need to be constructed. However, existing roads at sludge landfills only consider the passage of vehicles and pedestrians, without addressing how to treat leachate from the sludge. Consequently, after a period of use, these temporary roads experience subsidence and collapse due to leachate infiltration. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a road system for in-situ sludge treatment in sludge landfills, which solves the problem of temporary roads sinking and collapsing due to leachate infiltration during in-situ sludge treatment in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a road system for in-situ sludge treatment in a sludge landfill, comprising: a leachate collection area, multiple first roads spaced apart along a first direction, multiple second roads spaced apart along a second direction, and multiple inspection wells; the first roads and second roads are connected to divide the landfill into multiple landfill zones; a leachate guiding layer is provided at the bottom of the first roads and second roads for leachate to pass through; an inspection well is provided at the connection point of the first roads and second roads respectively, and a first guide pipe and a second guide pipe are provided on the inspection well. The first guide pipe is located above the second guide pipe and is used to guide the leachate in the leachate guiding layer into the inspection well; the second guide pipe is connected to the leachate collection area to guide the leachate in the inspection well into the leachate collection area.

[0007] Optionally, the width of the first road is greater than the width of the second road; and / or, the interval between two adjacent first roads and / or two adjacent second roads is 25-35m.

[0008] Optionally, the first path and / or the second path includes a base layer disposed below the leachate diversion layer and an impermeable layer disposed above the leachate diversion layer.

[0009] Optionally, the thickness of the base layer is greater than 20cm.

[0010] Optionally, the leachate diversion layer includes a cement mortar finish and a crushed stone gradation layer disposed between the cement mortar finish and the base layer.

[0011] Optionally, the impermeable layer includes multiple layers of soil cover and multiple HDME geomembranes, with at least one layer of geotextile between two adjacent HDME geomembranes.

[0012] Optionally, the first road and / or the second road may also include a gravel cushion layer and a concrete layer, wherein the gravel cushion layer is disposed between the concrete layer and the impermeable layer.

[0013] Optionally, the concrete layer may consist of two layers of concrete.

[0014] Optionally, the inspection well includes an inspection well body, a well cover, a first support base, and a concrete base; the well cover is disposed above the inspection well body to seal the inspection well body; the first diversion pipe is disposed on the side wall of the inspection well body and is disposed corresponding to the leachate diversion layer; the second diversion pipe is disposed at the bottom of the inspection well body; the first support base is disposed on the upper side wall of the inspection well body, and the concrete base is disposed on the first support base.

[0015] Optionally, the inspection well also includes a second support base and a support column. The second support base is disposed on the lower side wall of the inspection well body, and one end of the support column is connected to the second support base and the other end is connected to the side wall of the inspection well body.

[0016] As described above, the road system for in-situ sludge treatment within a sludge landfill according to this utility model has at least the following beneficial effects:

[0017] 1. The landfill is divided into multiple landfill zones by connecting the first and second roads. Each landfill zone can handle sludge separately, which is beneficial for targeted treatment based on the source and properties of sludge in different areas.

[0018] 2. The leachate in the buried section is discharged to the leachate collection area through the leachate diversion layer, the first diversion pipe and the second diversion pipe set at the bottom of the road. This prevents the leachate from accumulating in the buried section and at the bottom of the road, causing road depressions and collapses, and also prevents the leachate from causing secondary environmental pollution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall road system for in-situ sludge treatment in a sludge landfill according to the present invention.

[0020] Figure 2 The diagram shows the structure of the first road and / or the second road of a road system for in-situ sludge treatment in a sludge landfill, according to this utility model.

[0021] Figure 3 The diagram shown is a structural schematic of the inspection well of a road system for in-situ sludge treatment in a sludge landfill, according to this utility model.

[0022] Component designation explanation:

[0023] 1. Leachate collection area; 2. First road; 21. Foundation layer; 22. Leachate diversion layer; 23. Impermeable layer; 24. Sand and gravel cushion layer; 25. Concrete layer; 3. Second road; 4. Inspection well; 41. First diversion pipe; 42. Second diversion pipe; 43. Inspection well body; 44. Well cover; 45. First support base; 46. Concrete base; 47. Second support base; 48. Support column; 5. Buried area. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] Please refer to all the accompanying drawings below. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0027] Please see Figure 1-3 This utility model provides a road system for in-situ sludge treatment within a sludge landfill, comprising: a leachate collection area 1, multiple first roads 2 spaced apart along a first direction, multiple second roads 3 spaced apart along a second direction, and multiple inspection wells 4; one of the first roads 2 and the second road 3 is a main road, and the other is a branch road. In this embodiment, the first road 2 can be the main road, and the multiple first roads 2 are arranged side by side on the landfill, that is, the first direction is a parallel direction, i.e., as shown in the example. Figure 1 The left and right directions; the second road 3 is a branch road, which is set parallel to the landfill site, that is, the second direction is a parallel direction, that is, as Figure 1 The landfill is divided into multiple landfill zones 5, each capable of processing sludge independently. This allows for targeted treatment based on the source and properties of the sludge from different areas. The interval between two adjacent first roads 2 and / or two adjacent second roads 3 is 25-35m, preferably 30m, to provide a suitable turning radius for transport vehicles, facilitating vehicle movement and material loading / unloading within the landfill, and avoiding potential interference from sampling operations between adjacent areas. Furthermore, the width of the main road is greater than the width of the branch roads; that is, in this embodiment, the width of the first road 2 is greater than the width of the second road 3. This reduces road construction costs and increases the number of landfill zones 5, thereby increasing the amount of sludge that the landfill can process.

[0028] A leachate guiding layer 22 is provided at the bottom of the first road 2 and the second road 3 for leachate to pass through; and an inspection well 4 is provided at each connection point of the first road 2 and the second road 3. A first guide pipe 41 and a second guide pipe 42 are provided on the inspection well 4. The first guide pipe 41 is located above the second guide pipe 42. The first guide pipe 41 is used to guide the leachate in the leachate guiding layer 22 into the inspection well 4. The second guide pipe 42 is connected to the leachate collection area 1 to guide the leachate in the inspection well 4 into the leachate collection area 1. In this way, the leachate in the buried section 5 can be discharged into the leachate collection area 1 through the leachate guiding layer 22, the first guide pipe 41 and the second guide pipe 42 provided at the bottom of the road, thus avoiding the accumulation of leachate in the buried section 5 and the bottom of the road, which would cause road depression and collapse. Understandably, leachate collection area 1 can be a collection pond constructed with retarded concrete, used to collect leachate for subsequent treatment.

[0029] The first road 2 and / or the second road 3 include a base layer 21 located below the leachate diversion layer 22 and an impermeable layer 23 located above the leachate diversion layer 22. The base layer 21 is constructed of compacted soil-rock mixture and has a thickness greater than 20 cm, preferably 30-50 cm, to ensure it can withstand the load of transport vehicles on the road. The leachate diversion layer 22 includes a cement mortar finish and a crushed stone gradation layer located between the cement mortar finish and the base layer 21. The crushed stone gradation layer utilizes the gaps between the crushed stone particles to divert leachate, forming continuous horizontal diversion channels. A cement mortar finish is constructed above the crushed stone gradation layer to prevent sludge solids from intruding into the crushed stone gradation layer, thus preventing blockage of the pores between the crushed stone particles and providing a smooth base layer for the impermeable layer 23 above. The impermeable layer 23 includes multiple layers of soil and multiple HDME geomembranes. At least one layer of geotextile is provided between two adjacent HDME geomembranes. The two adjacent HDME geomembranes can be connected by welding or bonding.

[0030] The first road 2 and / or the second road 3 also include a gravel cushion layer 24 and a concrete layer 25, with the gravel cushion layer 24 positioned between the concrete layer 25 and the impermeable layer 23. The gravel cushion layer 24 effectively disperses the load transferred from the surface layer, reducing pressure on the impermeable layer 23 and acting as a buffer and leveling layer. The concrete layer 25 comprises two layers of concrete. One layer forms the surface layer, directly bearing the loads from vehicles or other facilities and equipment. The other layer connects the surface layer and the gravel cushion layer 24, uniformly transferring the load and preventing the surface load from spreading downwards, further enhancing the integrity and load-bearing capacity of the temporary road.

[0031] The inspection well 4 may include an inspection well body 43, a well cover 44, a first support 45, and a concrete seat 46. The well cover 44 is a heavy-duty well cover 44, designed to withstand vehicle loads or loads generated by other facilities and equipment. It is positioned above the inspection well body 43 to seal the inspection well body 43. A first diversion pipe 41 is positioned on the side wall of the inspection well body 43, corresponding to the leachate diversion layer 22, to divert leachate into the inspection well body 43. A second diversion pipe 42 is positioned at the bottom of the inspection well body 43 to divert leachate into the leachate collection area 1. The first support 45 is positioned on the upper side wall of the inspection well body 43, and the concrete seat 46 is positioned on the first support 45. The first support 45 may be made of metal or concrete to withstand vehicle loads or loads generated by other facilities and equipment, preventing the inspection well body 43 from collapsing.

[0032] The inspection well 4 also includes a second support base 47 and a support column 48. The second support base 47 is disposed on the lower side wall of the inspection well body 43. The support column 48 can be made of metal or concrete, with one end connected to the second support base 47 and the other end connected to the side wall of the inspection well body 43 to support the inspection well body 43 and ensure that the inspection well body 43 will not collapse.

[0033] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0034] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A road system for in-situ sludge treatment within a sludge landfill, characterized in that, include: Leachate collection area, multiple first roads spaced apart along a first direction, multiple second roads spaced apart along a second direction, and multiple inspection wells; The first road and the second road are connected, dividing the landfill into multiple landfill zones. The bottom of the first road and the second road is provided with a leachate diversion layer for leachate to pass through. A manhole is provided at the connection point of the first road and the second road. A first guide pipe and a second guide pipe are provided on the manhole. The first guide pipe is located above the second guide pipe. The first guide pipe is used to guide the leachate in the leachate guiding layer into the manhole. The second guide pipe is connected to the leachate collection area to guide the leachate in the manhole into the leachate collection area.

2. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 1, wherein: The width of the first road is greater than the width of the second road; And / or, the interval between two adjacent first roads and / or two adjacent second roads is 25-35m.

3. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 1, wherein: The first path and / or the second path includes a base layer disposed below the leachate guiding layer and an impermeable layer disposed above the leachate guiding layer.

4. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 3, characterized in that: The thickness of the base layer is greater than 20cm.

5. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 3, wherein: The leachate diversion layer includes a cement mortar plaster and a crushed stone gradation layer disposed between the cement mortar plaster and the base layer.

6. A road system for zoned in-situ sludge treatment within a sludge landfill, as described in claim 3, is characterized in that: The impermeable layer includes multiple layers of geotextile and multiple HDME geomembranes, with at least one layer of geotextile between two adjacent HDME geomembranes.

7. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 3, wherein: The first road and / or the second road further include a gravel cushion layer and a concrete layer, wherein the gravel cushion layer is disposed between the concrete layer and the impermeable layer.

8. A road system for zoned in-situ treatment of sludge in a sludge landfill site according to claim 7, characterised in that: The concrete layer comprises two layers of concrete.

9. The road system for partitioning in-situ treatment of sludge in a sludge landfill site according to claim 3, wherein: The inspection well includes an inspection well body, a well cover, a first support base, and a concrete base; The manhole cover is installed above the manhole body to seal the manhole body; the first guide pipe is installed on the side wall of the manhole body and corresponds to the leachate guide layer; the second guide pipe is installed at the bottom of the manhole body. The first support is mounted on the upper side wall of the inspection well body, and the concrete seat is mounted on the first support.

10. A road system for zoned in-situ treatment of sludge in a sludge landfill site according to claim 9, characterised in that: The inspection well also includes a second support base and a support column. The second support base is disposed on the lower side wall of the inspection well body. One end of the support column is connected to the second support base, and the other end is connected to the side wall of the inspection well body.

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