Oil separation tank structure

Abstract

The utility model discloses an oil separation tank structure and belongs to the technical field of oil separation tanks. The structure comprises a foundation pit and an oil separation tank, a cushion layer assembly is laid at the bottom of the foundation pit, the oil separation tank is arranged on the cushion layer assembly, a water inlet pipe is arranged at one end of the oil separation tank, a water drainage pipe is arranged at the other end of the oil separation tank, a partition plate is arranged at the position, between the water inlet pipe and the water drainage pipe, of the top of the inner side of the oil separation tank, and the partition plate is located above a bottom plate of the oil separation tank. A protective layer is arranged at the top of the oil separation tank, the periphery of the oil separation tank and the protective layer is filled with a compaction layer, and a surface layer assembly is jointly laid on the protective layer and the compaction layer. As the water passing opening between the partition plate and the bottom plate of the oil separation tank is large, the requirement for passing large-flow sewage can be met, and the oil-water separation efficiency of the oil separation tank can be improved.

Description

Technical Field

[0001] This utility model relates to an oil separator structure and belongs to the field of oil separator technology. Background Technology

[0002] An oil separator is a facility that separates oil and water based on their different densities and by using the principle of gravity.

[0003] For example, Chinese patent document CN213803027U discloses an oil separator for treating domestic sewage in urban areas. This oil separator includes a pit dug underground, with a concrete cushion layer at the bottom. A tank body is located within the pit above the concrete cushion layer. The tank body is divided into an inlet chamber and an outlet chamber by vertical partitions. An inlet pipe is located at the top of the inlet chamber, and an outlet pipe is located at the top of the outlet chamber. Filter pipes are installed on the vertical partitions. A maintenance cover is fastened to the top of the tank body. Coarse sand is filled between the outer wall of the tank body and the inner wall of the pit. The tank body is made of fiberglass, and the soil is ordinary fine soil or loess. Under the influence of gravity, the oily wastewater is separated and removed by natural flotation due to the difference in specific gravity between oil and water.

[0004] However, the oil separator has a filter pipe installed on the vertical baffle to transport water from the inlet chamber to the outlet chamber. Due to the limited flow of the filter pipe, the oil-water separation efficiency of the oil separator is low. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an oil separator structure.

[0006] This utility model is achieved through the following technical solution:

[0007] An oil separator structure includes a foundation pit and an oil separator. A cushion layer assembly is laid at the bottom of the foundation pit, and the oil separator is disposed on the cushion layer assembly. One end of the oil separator is provided with a water inlet pipe, and the other end is provided with a drain pipe. A baffle is provided on the top of the inner side of the oil separator between the water inlet pipe and the drain pipe, and the baffle is located above the bottom plate of the oil separator. A protective layer is provided on the top of the oil separator. The oil separator and the protective layer are surrounded by a compacted layer, and a surface layer assembly is laid on both the protective layer and the compacted layer.

[0008] The subbase assembly includes a graded crushed stone subbase, a C20 concrete subbase, and a fine sand subbase laid sequentially from bottom to top.

[0009] The thickness of the graded crushed stone cushion layer, C20 concrete cushion layer, and fine sand cushion layer shall not be less than 100 mm.

[0010] The compacted layer is formed by backfilling with medium sand in layers, and the density of the compacted layer is not less than 95%.

[0011] The protective layer is a reinforced concrete slab.

[0012] The top surface of the protective layer is coplanar with the top surface of the compacted layer.

[0013] The surface component comprises, from bottom to top, a fine sand surface layer, a graded crushed stone surface layer, a C20 concrete surface layer, and a permeable brick layer.

[0014] The top of the oil separator is provided with brick-built inspection wells on both sides of the partition, and the inlet of the brick-built inspection wells is provided with a cover plate.

[0015] The brick-built inspection well penetrates the protective layer and the surface component, and the upper end face of the brick-built inspection well is coplanar with the upper surface of the surface component, or is located above the upper surface of the surface component.

[0016] The beneficial effects of this invention are as follows: After sewage enters the grease trap through the inlet pipe, it undergoes primary oil-water separation in the chamber on the left side of the baffle. Then, the water in this chamber flows through the inlet between the baffle and the bottom plate of the grease trap into the chamber on the right side of the baffle for secondary oil-water separation. The separated water is finally discharged through the drain pipe. Because the inlet between the baffle and the bottom plate of the grease trap is relatively large, it can meet the needs of large-flow sewage, thus improving the oil-water separation efficiency of the grease trap. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1-Graded crushed stone cushion layer, 2-C20 concrete cushion layer, 3-Fine sand cushion layer, 4-Compacted layer, 5-Oil separator, 6-Water inlet pipe, 7-Protective layer, 8-Fine sand surface layer, 9-Graded crushed stone surface layer, 10-C20 concrete surface layer, 11-Permeable brick layer, 12-Brick inspection well, 13-Cover plate, 14-Partition plate, 15-Drainage pipe. Detailed Implementation

[0019] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0020] like Figure 1As shown, the present invention discloses an oil separator structure, comprising a foundation pit and an oil separator 5. A cushion layer assembly is laid at the bottom of the foundation pit, and the oil separator 5 is situated on the cushion layer assembly. One end of the oil separator 5 is provided with a water inlet pipe 6, and the other end with a drain pipe 15. A partition plate 14 is provided on the top inner side of the oil separator 5 between the water inlet pipe 6 and the drain pipe 15, and the partition plate 14 is located above the bottom plate of the oil separator 5. A protective layer 7 is provided on the top of the oil separator 5. A compacted layer 4 surrounds the oil separator 5 and the protective layer 7, and a surface layer assembly is laid on both the protective layer 7 and the compacted layer 4. In use, the cushion layer assembly increases the bearing capacity of the foundation on the oil separator 5, and the compacted layer 4 ensures the stability of the oil separator 5. The protective layer 7 on top of the oil separator 5, and the surface layer assembly laid on both the protective layer 7 and the compacted layer 4, provide protection for the oil separator 5 and prevent ground loads from disturbing it. After sewage enters the grease trap 5 through the inlet pipe 6, it undergoes primary oil-water separation in the chamber on the left side of the baffle 14. Then, the water in this chamber flows through the inlet between the baffle 14 and the bottom plate of the grease trap 5 into the chamber on the right side of the baffle 14 for secondary oil-water separation. The separated water is finally discharged through the drain pipe 15. Because the inlet between the baffle 14 and the bottom plate of the grease trap 5 is relatively large, it can meet the needs of large-flow sewage, thus improving the oil-water separation efficiency of the grease trap 5.

[0021] The subbase assembly includes, from bottom to top, a graded crushed stone subbase 1, a C20 concrete subbase 2, and a fine sand subbase 3.

[0022] The thickness of the graded crushed stone cushion layer 1, the C20 concrete cushion layer 2, and the fine sand cushion layer 3 is not less than 100 mm.

[0023] The compacted layer 4 is formed by backfilling with medium sand in layers, and the density of the compacted layer 4 is not less than 95%.

[0024] The protective layer 7 is a reinforced concrete slab.

[0025] The top surface of the protective layer 7 is coplanar with the top surface of the compacted layer 4.

[0026] The surface component includes, from bottom to top, a fine sand surface layer 8, a graded crushed stone surface layer 9, a C20 concrete surface layer 10, and a permeable brick layer 11.

[0027] The top of the oil separator 5 is provided with brick-built inspection wells 12 on both sides of the partition plate 14, and the inlet of the brick-built inspection well 12 is provided with a cover plate 13.

[0028] The brick-built inspection well 12 penetrates the protective layer 7 and the surface component, and the upper end face of the brick-built inspection well 12 is coplanar with the upper surface of the surface component, or is located above the upper surface of the surface component.

[0029] It facilitates the maintenance and repair of the oil separator 5 using the brick-built inspection well 12, and also facilitates the scooping out of the oil floating on the water surface in the oil separator 5.

Claims

1. An oil separator structure, characterized in that: The structure includes a foundation pit and an oil separator (5). A cushion layer assembly is laid at the bottom of the foundation pit. The oil separator (5) is located on the cushion layer assembly. One end of the oil separator (5) is provided with a water inlet pipe (6) and the other end is provided with a drain pipe (15). A partition (14) is provided between the water inlet pipe (6) and the drain pipe (15) on the top of the inner side of the oil separator (5). The partition (14) is located above the bottom plate of the oil separator (5). A protective layer (7) is provided on the top of the oil separator (5). A compacted layer (4) is filled around the oil separator (5) and the protective layer (7). A surface layer assembly is laid on both the protective layer (7) and the compacted layer (4).

2. The oil separator structure as described in claim 1, characterized in that: The subbase assembly includes, from bottom to top, a graded crushed stone subbase (1), a C20 concrete subbase (2), and a fine sand subbase (3).

3. The oil separator structure as described in claim 2, characterized in that: The thickness of the graded crushed stone cushion layer (1), the C20 concrete cushion layer (2), and the fine sand cushion layer (3) is not less than 100 mm.

4. The oil separator structure as described in claim 1, characterized in that: The compacted layer (4) is formed by backfilling with medium sand in layers, and the compaction degree of the compacted layer (4) is not less than 95%.

5. The oil separator structure as described in claim 1, characterized in that: The protective layer (7) is a reinforced concrete slab.

6. The oil separator structure as described in claim 1, characterized in that: The top surface of the protective layer (7) is coplanar with the top surface of the compacted layer (4).

7. The oil separator structure as described in claim 1, characterized in that: The surface component comprises, from bottom to top, a fine sand surface layer (8), a graded crushed stone surface layer (9), a C20 concrete surface layer (10), and a permeable brick layer (11).

8. The oil separator structure as described in claim 1, characterized in that: The top of the oil separator (5) is provided with brick-built inspection wells (12) on both sides of the partition (14), and the inlet of the brick-built inspection wells (12) is provided with a cover plate (13).

9. The oil separator structure as described in claim 8, characterized in that: The brick-built maintenance well (12) penetrates the protective layer (7) and the surface component, and the upper end face of the brick-built maintenance well (12) is coplanar with the upper surface of the surface component, or is located above the upper surface of the surface component.

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