Acid pickling waste liquid storage tank

Abstract

The utility model discloses a pickling waste liquid storage tank belongs to the technical field of storage tank, and this storage tank includes tank body and first partition and second partition, and forms the precipitation area between first partition and second partition, and forms the first work area between first partition and tank body, and forms the second work area between second partition and tank body, and the volume of first work area is V1, and the volume of second work area is V2, and the volume of precipitation area is V3, and V3V2V1, and the first import pipe is equipped at tank body top, and the first export pipe and second export pipe are equipped in tank body lateral wall. The utility model discloses through setting up two partition plates and separating the inside of tank body into precipitation area and two work areas, and the waste residue in pickling waste liquid deposits in the precipitation area, and reduces the subsequent processing step burden, and when processing a small amount of pickling waste liquid, can also deposit first and then discharge, and sets up the inclined support block on two partition plates, improves the structure stability of two partition plates and improves the sewage discharge efficiency of precipitation area.

Description

Technical Field

[0001] This utility model belongs to the field of storage tank technology, specifically relating to a pickling waste liquid storage tank. Background Technology

[0002] Pickling wastewater is the wastewater generated during pickling processes using acids such as sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, and phosphoric acid to remove oxides from metal surfaces. Pickling wastewater is typically treated using methods such as neutralization, oxidation, coagulation, or membrane separation. Before treatment, the wastewater is usually stored in tanks. Because residual fragments, welding slag, or incompletely dissolved solid particles from the pickling process form sludge, this sludge usually settles at the bottom of the tank. When the tank's drain valve is opened, the sludge is discharged along with the liquid, increasing the burden on subsequent treatment steps and affecting the effectiveness of subsequent processes in treating the pickling wastewater. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a pickling waste liquid storage tank for preliminary sedimentation of stored pickling waste liquid, thereby reducing the burden of subsequent waste liquid treatment steps.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A pickling waste liquid storage tank includes a tank body and a first partition plate and a second partition plate disposed within the tank body. A sedimentation zone is formed between the first partition plate and the second partition plate. A first working zone is formed between the first partition plate and the tank body. A second working zone is formed between the second partition plate and the tank body. The sedimentation zone is located between the first working zone and the second working zone. The volume of the first working zone is V1, the volume of the second working zone is V2, and the volume of the sedimentation zone is V3, where V3 < V2 < V1. A first inlet pipe corresponding to the sedimentation zone is provided at the top of the tank body, and a first outlet pipe corresponding to the first working zone and a second outlet pipe corresponding to the second working zone are provided on the side wall of the tank body.

[0006] Furthermore, the sedimentation zone is connected to the first working area via a first connecting channel, and the sedimentation zone is connected to the second working area via a second connecting channel.

[0007] Furthermore, the horizontal height of the second connection channel is lower than that of the first connection channel.

[0008] Furthermore, the first connection channel is provided with a first filter screen, and the second connection channel is provided with a second filter screen.

[0009] Furthermore, V2 < 0.5V1.

[0010] Furthermore, the first inlet pipe extends into the sedimentation zone via an extension pipe.

[0011] Furthermore, the tank body includes an inner plastic lining and an outer shell.

[0012] Furthermore, the first partition plate is provided with a first inclined support block, and the second partition plate is provided with a second inclined support block, the first and second inclined support blocks making the lower end of the sedimentation zone inverted cone shape.

[0013] Furthermore, the tank body is provided with a manhole and an exhaust pipe, and the bottom of the tank body is provided with a slag discharge pipe.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0015] 1. By setting two partition plates, the tank is divided into a sedimentation zone and two working zones. After the pickling waste liquid enters the tank, it first enters the sedimentation zone and then enters the working zone. The waste residue in the pickling waste liquid settles in the sedimentation zone, reducing the burden of subsequent treatment steps.

[0016] 2. In the two working areas, the volume of the second working area is smaller than that of the first working area, and the horizontal height of the second connecting channel is lower than that of the first connecting channel. The volume of the sedimentation area is smaller than that of the second working area. The waste liquid in the sedimentation area overflows into the second working area first. When treating a small amount of pickling waste liquid, it can also be precipitated first and then discharged. A small amount of waste liquid can also accumulate to a higher height in the second working area, which is convenient for waste liquid discharge.

[0017] 3. Diagonal bracing blocks are installed on the two partition plates to improve the structural stability of the two partition plates and enhance the sewage discharge efficiency of the sedimentation zone. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the sedimentation zone structure in an embodiment;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the first partition plate in the embodiment. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0022] like Figure 1 and Figure 3As shown, a pickling waste liquid storage tank includes a tank body 1, a first partition plate 2, and a second partition plate 3. The tank body 1 is a horizontal tank, and includes an inner plastic lining layer 18 and an outer shell 19. The outer shell 19 is a steel shell, and a steel mesh is welded to the inner surface of the outer shell 19. The inner plastic lining layer 18 is made of plastic materials such as polyethylene, polypropylene, or polytetrafluoroethylene. In this embodiment, the inner plastic lining layer 18 is made of polytetrafluoroethylene, which is resistant to strong acids and alkalis and high temperatures. The inner plastic lining layer 18 is connected to the outer shell 19 using a rotational molding process. The bottom of the tank body 1 is provided with two bases 9, which use existing saddles to support the tank body 1.

[0023] like Figure 1 and Figure 2 As shown, the first partition plate 2 and the second partition plate 3 are vertically arranged inside the tank 1. The outer layers of the first partition plate 2 and the second partition plate 3 are also made of polytetrafluoroethylene (PTFE) material, thus making them resistant to strong acids and alkalis. The longitudinal section of the tank 1 is circular. The first partition plate 2 and the second partition plate 3 are both circular plates corresponding to the tank 1, thereby dividing the space inside the tank 1. The first partition plate 2 and the second partition plate 3 divide the space inside the tank 1 into three regions. A sedimentation zone 103 is formed between one side of the first partition plate 2 and the corresponding side of the second partition plate 3. A first working zone 101 is formed between the first partition plate 2 and the tank 1, and the first working zone 101 is located on the other side of the first partition plate 2. A second working zone 102 is formed between the second partition plate 3 and the tank 1, and the second working zone 102 is located on the other side of the first partition plate 2. On the other side of the second partition plate 3, the sedimentation zone 103 is located between the first working zone 101 and the second working zone 102. In this embodiment, the first partition plate 2 and the second partition plate 3 are located near the left end of the tank 1. The distance between the first partition plate 2 and the second partition plate 3 is less than the distance between the second partition plate 3 and the left end of the tank 1. The volume of the first working zone 101 is V1, the volume of the second working zone 102 is V2, and the volume of the sedimentation zone 103 is V3. V3 < V2 < V1. The first working zone 101 has the largest volume, and then the volume of the second working zone 102 is smaller than that of the first working zone 101. The sedimentation zone 103 has the smallest volume, V2 < 0.5V1. In this embodiment, V2 = 0.3V1, so the volume of the second working zone 102 is much smaller than that of the first working zone 101.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, the top of the tank 1 is provided with a first inlet pipe 11, which is located in the sedimentation zone 103. The pickling waste liquid enters the tank 1 through the first inlet pipe 11. The first inlet pipe 11 extends to the sedimentation zone 103 through an extension pipe 111. The extension pipe 111 is a plastic pipe made of polytetrafluoroethylene. A baffle 112 is connected to the lower outlet of the extension pipe 111. The baffle 112 can block the falling pickling waste liquid from impacting downwards and prevent the pickling waste liquid from directly impacting the bottom of the sedimentation zone 103, thereby reducing the impact on the sediment at the bottom of the sedimentation zone 103. The first partition plate 2 is provided with a first inclined support block 21 on one side of the sedimentation zone 103. The first inclined support block 21 is a triangular block, made of polytetrafluoroethylene (PTFE), and integrally formed with the first partition plate 2. The lower end of the first inclined support block 21 is connected to the inner wall of the tank body 1. The second partition plate 3 is provided with a second inclined support block 31 on one side of the sedimentation zone 103. The second inclined support block 31 is a triangular block, made of PTFE, and integrally formed with the second partition plate 3. The lower end is connected to the inner wall of the tank body 1. The first inclined support block 21 and the second inclined support block 31 can strengthen the structural strength of the first partition plate 2 and the second partition plate 3, and increase the cross-sectional area of ​​the bottom of the two partition plates to disperse the liquid pressure, thereby enhancing the stability of the two partition plates when the sedimentation zone 103 is filled with pickling waste liquid. The bottom of the tank body 1 is provided with a slag discharge pipe 16, the position of which corresponds to the sedimentation zone 103. The first inclined support block 21 and the second inclined support block 31 make the lower end of the sedimentation zone 103 into an inverted cone shape, thereby improving the sewage discharge efficiency during sewage discharge.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, the first partition plate 2 is provided with a first connecting channel 104, and the sedimentation zone 103 is connected to the first working zone 101 through the first connecting channel 104. In this embodiment, the first connecting channel 104 is a circular hole. The second partition plate 3 is provided with a second connecting channel 105, and the sedimentation zone 103 is connected to the second working zone 102 through the second connecting channel 105. In this embodiment, the second connecting channel 105 is also a circular hole. The horizontal height of the second connecting channel 105 is lower than the horizontal height of the first connecting channel 104. When the pickling waste liquid in the sedimentation zone 103 accumulates to a certain height, the pickling waste liquid overflows from the second connecting channel 105 to the second working zone 102. When the pickling waste liquid in the second working zone 102 accumulates to a certain height, the pickling waste liquid overflows from the first connecting channel 104 to the first working zone 101. The side wall of the tank 1 is provided with a first outlet pipe 12 at a position corresponding to the first working zone 101. The outlet pipe 12 is connected to the first working area 101. The side wall of the tank 1 is provided with a second outlet pipe 13 corresponding to the second working area 102. The second outlet pipe 13 is connected to the second working area 102. The pickling waste liquid in the tank 1 is discharged from the second outlet pipe 13 and the first outlet pipe 12. When the amount of pickling waste liquid is small, the pickling waste liquid settles in the sedimentation zone 103. Most of the waste residue and impurities in the liquid are deposited at the bottom of the sedimentation zone 103. The pickling waste liquid in the sedimentation zone 103 overflows to the second connecting channel 105 and then to the second working area 102, and is discharged from the second outlet pipe 13. The small amount of waste liquid in the second working area 102 can also have a high liquid level, which facilitates the discharge of the liquid. When the amount of pickling waste liquid is greater than the capacity of the second working area 102, the second working area 102 is full of pickling waste liquid. The pickling waste liquid overflows from the first connecting channel 104 to the first working area 101 and is discharged from the first outlet pipe 12.

[0026] like Figure 1 As shown, the tank body 1 is equipped with a manhole 14 and an exhaust pipe 15. The manhole 14 is located at the top center of the tank body 1. There are two exhaust pipes 15, which are respectively connected to the first working area 101 and the second working area 102 for discharging waste gas. The waste gas is collected by external equipment and enters the waste gas treatment stage. A first filter screen is provided on the first connecting channel 104, and a second filter screen is provided on the second connecting channel 105. Both filter screens (not shown in the figure) are detachably connected to the corresponding partition plates. The detachable connection method is the existing threaded connection or snap-fit ​​connection. The filter screens are all made of polytetrafluoroethylene material, and the pore size of the filter screen is selected as needed.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pickling waste liquid storage tank, characterized in that, The system includes a tank (1) and a first partition plate (2) and a second partition plate (3) disposed within the tank (1). A sedimentation zone (103) is formed between the first partition plate (2) and the second partition plate (3). A first working zone (101) is formed between the first partition plate (2) and the tank (1). A second working zone (102) is formed between the second partition plate (3) and the tank (1). The sedimentation zone (103) is located between the first working zone (101) and the second working zone (102). Between the two working areas, the volume of the first working area (101) is V1, the volume of the second working area (102) is V2, and the volume of the sedimentation area (103) is V3, where V3 < V2 < V1. The top of the tank (1) is provided with a first inlet pipe (11) corresponding to the sedimentation area (103), and the side wall of the tank (1) is provided with a first outlet pipe (12) corresponding to the first working area (101) and a second outlet pipe (13) corresponding to the second working area (102).

2. The pickling waste liquid storage tank according to claim 1, characterized in that, The sedimentation zone (103) is connected to the first working area (101) through the first connecting channel (104), and the sedimentation zone (103) is connected to the second working area (102) through the second connecting channel (105).

3. The pickling waste liquid storage tank according to claim 2, characterized in that, The horizontal height of the second connection channel (105) is lower than that of the first connection channel (104).

4. The pickling waste liquid storage tank according to claim 1, characterized in that, The first connecting channel (104) is provided with a first filter screen (41), and the second connecting channel (105) is provided with a second filter screen (42).

5. The pickling waste liquid storage tank according to claim 1, characterized in that, V2 < 0.5V1.

6. The pickling waste liquid storage tank according to claim 1, characterized in that, The first inlet pipe (11) extends to the sedimentation zone (103) via an extension pipe (111).

7. The pickling waste liquid storage tank according to claim 1, characterized in that, The tank (1) includes an inner plastic lining (18) and an outer shell (19).

8. The pickling waste liquid storage tank according to claim 1, characterized in that, The first partition plate (2) is provided with a first inclined support block (21), and the second partition plate (3) is provided with a second inclined support block (31). The first inclined support block (21) and the second inclined support block (31) make the lower end of the sedimentation zone (103) inverted cone shape.

9. The pickling waste liquid storage tank according to claim 1, characterized in that, The tank (1) is provided with a manhole (14) and an exhaust pipe (15), and the bottom of the tank (1) is provided with a slag discharge pipe (16).

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