Wastewater storage tank for coal tar processing

Abstract

The utility model relates to a waste water storage tank for coal tar processing, which comprises an oil-water mixing tank and a collecting ring, the collecting ring is coaxially and fixedly connected with the oil-water mixing tank, an inner cavity of the oil-water mixing tank is communicated with an inner cavity of the collecting ring, a plurality of drain holes are circumferentially arranged at the bottom of the oil-water mixing tank, and a first oil pumping port is arranged above the side wall of the oil-water mixing tank. A second oil pumping port is formed in the upper portion of the side wall of the collecting ring, a partition ring is fixedly arranged in the collecting ring and located above the drainage hole, a drainage port is formed in the lower portion of the side wall of the collecting ring and located below the partition ring, and a plurality of annular oil filter screens are detachably arranged between the inner wall of the collecting ring and the outer wall of the oil-water mixing tank at intervals; a plurality of oil guide pipes communicated with an inner cavity of the collecting ring are arranged on the lower portion of the side wall of the oil-water mixing tank in the circumferential direction, specifically, oil on the upper middle layer of the oil-water mixing tank can be pumped out through the first oil pumping port, water at the bottom of the oil-water mixing tank is discharged out of the water discharging port, and an oil layer floating on a water layer can be pumped into the collecting ring through the second oil pumping port and the oil guide pipes. And oil residues entering the collecting ring can be subjected to multiple filtration through the multiple layers of annular oil filter screens, and recycled oil is discharged from the second oil pumping port.

Description

Technical Field

[0001] The utility model relates to the field of coal tar, in particular to a wastewater storage tank for coal tar processing. Background Art

[0002] During the production process at coal tar processing plants, light oil and gas produced from the top of the dehydration tower and the primary distillation tower pass through a condenser and enter the middle of the oil-water separator for oil-water separation. In the oil-water separator, the light oil at the top is collected, stored, and sold, while the wastewater at the bottom is treated and discharged. Because some light oil in the wastewater cannot be completely separated, oil deposits accumulate at the bottom of the grease trap, making wastewater treatment more difficult. This not only increases treatment costs and energy consumption, but also results in significant product waste. However, existing wastewater storage tanks are unable to fully separate the oil and water, necessitating improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a coal tar processing wastewater storage tank, which is used to solve the problem that the existing coal tar processing wastewater storage tank cannot fully separate oil and water.

[0004] In order to solve the above problems, the utility model provides a wastewater storage tank for coal tar processing, including an oil-water mixing tank and a collecting ring, the collecting ring is fixedly connected to the oil-water mixing tank coaxially, the inner cavity of the oil-water mixing tank is communicated with the inner cavity of the collecting ring, a plurality of drainage holes are circumferentially provided at the bottom of the oil-water mixing tank, a first oil extraction port is provided above the side wall of the oil-water mixing tank, a second oil extraction port is provided above the side wall of the collecting ring, a split ring is fixedly provided in the collecting ring, the split ring is located above the drainage hole, a drainage port is provided below the side wall of the collecting ring, and the drainage port is located below the split ring, a plurality of annular oil filters are detachably arranged at intervals between the inner wall of the collecting ring and the outer wall of the oil-water mixing tank, a plurality of oil guide pipes communicating with the inner cavity of the collecting ring are circumferentially provided below the side wall of the oil-water mixing tank.

[0005] The utility model provides a coal tar processing wastewater storage tank which also has the following technical features:

[0006] Furthermore, the number of the annular oil filters is at least 3.

[0007] Furthermore, the distance between two adjacent annular oil filters is 5-8 cm.

[0008] Furthermore, the oil guide pipe is in an "L" shape.

[0009] Furthermore, a sealing ring cover is provided on the top of the collecting ring, and the top of the annular oil filter is fixed to the bottom wall of the sealing ring cover.

[0010] Furthermore, a limiting flange is fixedly provided on the side wall of the oil-water mixing tank, the inner wall of the sealing ring cover is fitted with the outer wall of the limiting flange, and the bottom end of the oil guide pipe passes through the limiting flange and is connected to the inner cavity of the collecting ring.

[0011] The utility model has the following beneficial effects: the oil in the upper layer of the oil-water mixing tank can be extracted through the first oil extraction port, and the water at the bottom of the oil-water mixing tank can be discharged from the drain port; the oil layer floating on the water layer can be extracted into the collecting ring through the second oil extraction port and the oil guide pipe; the oil residue entering the collecting ring can be filtered multiple times through the multiple layers of the annular oil filter mesh, and the recovered oil can be discharged from the second oil extraction port. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the coal tar processing wastewater storage tank;

[0013] Figure 2 for Figure 1 Schematic diagram of the half-section structure. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0015] like Figures 1 to 2 In the embodiment of a coal tar processing wastewater storage tank of the utility model shown, it includes an oil-water mixing tank 1 and a collecting ring 2. The collecting ring 2 is fixedly connected to the oil-water mixing tank 1 coaxially. The inner cavity of the oil-water mixing tank 1 is communicated with the inner cavity of the collecting ring 2. A plurality of drainage holes 101 are opened in the circumferential direction of the bottom of the oil-water mixing tank 1. A first oil extraction port 102 is provided above the side wall of the oil-water mixing tank 1. A second oil extraction port 21 is provided above the side wall of the collecting ring 2. A split ring 3 is fixedly provided in the collecting ring 2. The split ring 3 is located above the drainage hole 101. A drainage port 22 is provided below the side wall of the collecting ring 2. The drainage port 22 is located at the split ring 3. Below the oil-water mixing tank 1, a plurality of annular oil filters 4 are detachably arranged at intervals between the inner wall of the collecting ring 2 and the outer wall of the oil-water mixing tank 1. A plurality of oil guide pipes 5 connected to the inner cavity of the collecting ring 2 are circumferentially arranged below the side wall of the oil-water mixing tank 1. Specifically, the oil in the upper layer of the oil-water mixing tank 1 can be extracted through the first oil extraction port 102, and the water at the bottom of the oil-water mixing tank 1 is discharged from the drain port 22. The oil layer floating on the water layer can be extracted into the collecting ring 2 through the second oil extraction port 21 and the oil guide pipe 5. The oil residue entering the collecting ring can be filtered multiple times through the multi-layer annular oil filter nets 4, and the recovered oil is discharged from the second oil extraction port 21.

[0016] In one embodiment of the present application, the number of the annular oil filter screens 4 is at least three.

[0017] In one embodiment of the present application, the distance between two adjacent annular oil filters 4 is 5-8 cm.

[0018] In one embodiment of the present application, the oil guide pipe 5 is in an “L” shape.

[0019] In one embodiment of the present application, a sealing ring cover 23 is provided on the top of the collecting ring 2 , and the top of the annular oil filter 4 is fixed to the bottom wall of the sealing ring cover 23 .

[0020] In one embodiment of the present application, a limiting flange 6 is fixedly provided on the side wall of the oil-water mixing tank 1, the inner wall of the sealing ring cover 23 is in contact with the outer wall of the limiting flange 6, and the bottom end of the oil guide pipe 5 passes through the limiting flange 6 and is connected to the inner cavity of the collecting ring 2.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A coal tar processing wastewater storage tank, characterized in that: The oil-water mixing tank includes an oil-water mixing tank and a collecting ring, the collecting ring is fixedly connected to the oil-water mixing tank coaxially, the inner cavity of the oil-water mixing tank is communicated with the inner cavity of the collecting ring, a plurality of drainage holes are circumferentially provided at the bottom of the oil-water mixing tank, a first oil extraction port is provided above the side wall of the oil-water mixing tank, a second oil extraction port is provided above the side wall of the collecting ring, a split ring is fixedly provided in the collecting ring, the split ring is located above the drainage hole, a drainage port is provided below the side wall of the collecting ring, and the drainage port is located below the split ring, a plurality of annular oil filters are detachably arranged at intervals between the inner wall of the collecting ring and the outer wall of the oil-water mixing tank, a plurality of oil guide pipes communicated with the inner cavity of the collecting ring are circumferentially provided below the side wall of the oil-water mixing tank.

2. A coal tar processing wastewater storage tank according to claim 1, characterized in that: The number of the annular oil filter screens is at least 3.

3. The coal tar processing wastewater storage tank according to claim 1, characterized in that: The distance between two adjacent annular oil filters is 5-8 cm.

4. A coal tar processing wastewater storage tank according to claim 1, characterized in that: The shape of the oil guide pipe is "L" shape.

5. The coal tar processing wastewater storage tank according to claim 3, characterized in that: A sealing ring cover is clamped on the top of the collecting ring, and the top of the annular oil filter is fixed to the bottom wall of the sealing ring cover.

6. A coal tar processing wastewater storage tank according to claim 5, characterized in that: A limiting flange is fixedly provided on the side wall of the oil-water mixing tank, the inner wall of the sealing ring cover is fitted with the outer wall of the limiting flange, and the bottom end of the oil guide pipe passes through the limiting flange and is connected to the inner cavity of the collecting ring.

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