Biological denitrification treatment device for mixed acid pickling wastewater

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a biological denitrification treatment device for mixed acid pickling wastewater, which comprises a treatment box, a partition plate is fixedly connected to an inner cavity of the treatment box, and the partition plate divides the inner cavity of the treatment box into a biological reaction cavity and an aeration cavity left and right. A sedimentation cavity is formed in the bottoms of the biological reaction cavity and the aeration cavity, a biological treatment mechanism is connected to the interior of the biological reaction cavity, an aeration mechanism is connected to the bottom of the aeration cavity, a mounting plate is fixedly connected to the top of a treatment box, a water tank is connected to the left side of the mounting plate, and a flow dividing pipe is arranged on the left side of the water tank; and a reflux pump is fixedly mounted on the right side wall of the treatment box. By arranging the biological treatment mechanism, the aeration mechanism and the reflux pump, ammonia nitrogen and organic matters in wastewater are effectively removed, and the biological filler plate is an independent module, so that a damaged or aged plate is conveniently and quickly replaced, and the cost and time are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a biological denitrification treatment device for mixed acid pickling wastewater. Background Art

[0002] Mixed acid pickling, widely used in the steel and electroplating industries, is a crucial process for cleaning metal surfaces and improving the surface structure of steel. During this process, metal objects are immersed in a mixed acid solution (such as hydrochloric acid, nitric acid, and hydrofluoric acid) at a specific temperature to remove the surface oxide layer. Nitrogen, present in the wastewater in the form of ammonia nitrogen and nitrate nitrogen, not only affects the water's self-purification capacity but can also pose a threat to human health through the food chain.

[0003] However, the wastewater generated by these processes contains a large amount of iron ions, chloride ions and other metal ions, and the concentration of nitrogen pollutants is also high. Traditional wastewater treatment processes cannot efficiently and stably remove nitrogen from the wastewater when treating mixed acid pickling wastewater. The low treatment efficiency can easily cause secondary pollution, and the equipment maintenance cost is high.

[0004] Based on this, the utility model designs a biological denitrification treatment device for mixed acid pickling wastewater to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a biological denitrification treatment device for mixed acid pickling wastewater to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: A biological denitrification treatment device for mixed acid pickling wastewater, comprising a treatment box, a partition plate fixedly connected to the inner cavity of the treatment box, the partition plate divides the inner cavity of the treatment box into a biological reaction chamber and an aeration chamber on the left and right, a sedimentation chamber is provided at the bottom of the biological reaction chamber and the aeration chamber, a biological treatment mechanism is connected to the biological reaction chamber, an aeration mechanism is connected to the bottom of the aeration chamber, a mounting plate is fixedly connected to the top of the treatment box, a water tank is connected to the left side of the mounting plate, a diversion pipe is provided on the left side of the water tank, the bottom end of the diversion pipe passes through the treatment box and extends into the biological reaction chamber, and a reflux pump is fixedly installed on the right side wall of the treatment box.

[0007] Preferably, the top of the diversion pipe is connected to a water inlet pipe and a return pipe in sequence from top to bottom, the return pipe is connected to the output end of the reflux pump through a pipeline, and the input end of the reflux pump is connected to the sedimentation chamber.

[0008] Preferably, the biological treatment mechanism includes several biological filler plates, connecting blocks, drawer plates and handles. The biological filler plates are embedded in the biological reaction chamber. The front side of the biological filler plates is fixedly connected to the connecting blocks. The connecting blocks pass through the front side of the treatment box and are fixedly connected to the drawer plates. The front side of the drawer plates is fixedly connected to the handle.

[0009] Preferably, the aeration mechanism includes an aeration plate, an aeration head and a fan. The aeration plate is fixedly connected to the bottom of the aeration chamber. Several aeration heads are fixedly installed on the aeration plate at equal intervals. The fan is fixedly installed on the mounting plate. The output end of the fan is connected to the aeration head on the aeration plate through a pipe.

[0010] Preferably, a water inlet and a drain are provided on the right side of the water tank, a water suction pump is fixedly installed on the top of the mounting plate, the input end of the water suction pump is connected to the top of the aeration chamber through a pipe, and the output end of the water suction pump is connected to the water inlet through a pipe.

[0011] Preferably, the top of the partition plate is connected to a connecting pipe for connecting the biological reaction chamber with the aeration chamber, and the top of the treatment box is also connected to an air cap, the bottom end of the air cap is connected to the biological reaction chamber.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0013] 1. The utility model realizes the effective removal of ammonia nitrogen and organic matter in wastewater by setting a biological treatment mechanism, an aeration mechanism and a reflux pump. Through the metabolic activity of microorganisms, nitrogen pollutants such as ammonia nitrogen and nitrate nitrogen in the wastewater are converted into harmless nitrogen and released into the air, thereby realizing the denitrification treatment of wastewater. The aeration mechanism transports air into the aeration chamber through a fan, increases the dissolved oxygen content in the wastewater, and promotes the growth and metabolism of microorganisms. At the same time, the aeration process can also promote the uniform distribution of pollutants in the wastewater, improve the treatment efficiency, and use the reflux pump to introduce the preliminary sedimentation wastewater into the biological reaction chamber for further treatment, thereby improving the treatment effect and resource utilization.

[0014] Second, the several bio-filler plates in the present invention are several independent modules, each of which can be independently installed and disassembled. The handle connected to the front side of the bio-filler plate can be used to facilitate the user to pull the bio-filler plate out of the bioreactor chamber, which helps to quickly replace damaged or aged bio-filler plates and reduce maintenance costs and time.

[0015] 3. The utility model divides the inner cavity of the treatment box into a biological reaction chamber and an aeration chamber by setting a partition plate, and connects the two through a connecting pipe, so that the wastewater can fully contact oxygen and microorganisms during the treatment process, further improving the treatment efficiency. At the same time, the gas cap is used to collect and discharge the waste gas generated during the treatment process, avoiding secondary pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 4 This is a schematic structural diagram of the biological treatment mechanism in the present utility model;

[0020] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 6 It is a structural diagram of the aeration mechanism in the utility model.

[0022] Among them: 1. Treatment box; 2. Partition plate; 3. Biological reaction chamber; 4. Aeration chamber; 5. Sedimentation chamber; 6. Biological treatment mechanism; 601. Biological filler plate; 602. Connecting block; 603. Pull-out plate; 604. Handle; 7. Aeration mechanism; 701. Aeration plate; 702. Aeration head; 703. Fan; 8. Mounting plate; 9. Water tank; 10. Diverter pipe; 11. Return pump; 12. Water inlet pipe; 13. Return pipe; 14. Water inlet; 15. Drain outlet; 16. Suction pump; 17. Connecting pipe; 18. Air cap. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1 - Figure 3Example 1 is described. The figure shows a biological denitrification treatment device for mixed acid pickling wastewater, including a treatment box 1. A partition plate 2 is fixedly connected to the inner cavity of the treatment box 1. The partition plate 2 divides the inner cavity of the treatment box 1 into a biological reaction chamber 3 and an aeration chamber 4 on the left and right. A sedimentation chamber 5 is provided at the bottom of the biological reaction chamber 3 and the aeration chamber 4. A biological treatment mechanism 6 is connected to the biological reaction chamber 3, and an aeration mechanism 7 is connected to the bottom of the aeration chamber 4. A mounting plate 8 is fixedly connected to the top of the treatment box 1, a water tank 9 is connected to the left side of the mounting plate 8, and a diversion pipe 10 is provided on the left side of the water tank 9. The bottom end of the diversion pipe 10 passes through the treatment box 1 and extends into the biological reaction chamber 3. A reflux pump 11 is fixedly installed on the right side wall of the treatment box 1.

[0026] See also Figure 2 and Figure 3 , the top of the diversion pipe 10 in the figure is connected to the water inlet pipe 12 and the return pipe 13 in sequence from top to bottom, the return pipe 13 is connected to the output end of the reflux pump 11 through a pipeline, and the input end of the reflux pump 11 is connected to the sedimentation chamber 5;

[0027] In this embodiment, the mixed acid pickling wastewater is transported to the biological reaction chamber 3 in the treatment box 1 through the water inlet pipe 12, and the biological treatment process is carried out by the biological treatment mechanism 6 in the biological reaction chamber 3. During the biological reaction process, the reacted wastewater is transported to the aeration chamber 4 through the top of the partition plate 2, and the aeration mechanism 7 provided in the aeration chamber 4 is used to maintain uniform distribution and sufficient aeration of the wastewater. During the treatment process, the suspended matter and some impurities in the wastewater will gradually settle into the sedimentation chamber 5. The reflux pump 11 is powered on and works to draw back part of the supernatant in the sedimentation chamber 5 and pass it through the reflux pipe 13. It re-enters the biological reaction chamber 3 through the diversion pipe 10 and mixes with fresh wastewater, thereby realizing the reuse of microorganisms in the sludge and the further conversion of nitrogen elements, and performing secondary treatment, thereby improving the wastewater treatment efficiency and saving water resources.

[0028] It should be noted that the device can also install water quality monitoring sensors on the side or top of the treatment box 1 to monitor the pH value, ammonia nitrogen concentration, dissolved oxygen and other indices of the wastewater in real time, and automatically adjust the working status of the biological treatment mechanism 6, aeration mechanism 7 and reflux pump 11 according to the preset parameter range through the control system to ensure that the treatment process is always in the optimal state and improve the treatment efficiency and stability.

[0029] Example 2

[0030] See also Figure 4 and Figure 6Example 2 is described. This embodiment further illustrates Example 1. In the figure, the biological treatment mechanism 6 includes several biological filler plates 601, a connecting block 602, a drawer plate 603 and a handle 604. The biological filler plates 601 are embedded in the biological reaction chamber 3. The front side of the biological filler plates 601 is fixedly connected to the connecting block 602. The connecting block 602 passes through the front side of the treatment box 1 and is fixedly connected to the drawer plate 603. The front side of the drawer plate 603 is fixedly connected to the handle 604.

[0031] Furthermore, the aeration mechanism 7 includes an aeration plate 701, an aeration head 702, and a fan 703. The aeration plate 701 is fixedly connected to the bottom of the aeration chamber 4. A plurality of aeration heads 702 are fixedly installed on the aeration plate 701 at equal intervals. The fan 703 is fixedly installed on the mounting plate 8. The output end of the fan 703 is connected to the aeration head 702 on the aeration plate 701 through a pipe.

[0032] In this embodiment, the biological filler plate 601 provides a place for microorganisms to attach and reproduce. These microorganisms can decompose ammonia nitrogen and organic matter in wastewater and effectively purify the water quality. As the biological reaction proceeds, the pollutants in the wastewater are gradually reduced, and harmless or low-toxic by-products are generated. The aeration head 702 on the aeration plate 701 is driven by the fan 703 to inject air or oxygen into the aeration chamber 4, and then enter the biological reaction chamber 3 through the connecting pipe 17 at the top of the partition plate 2, providing the necessary oxygen environment for microorganisms, promoting the progress of biological reaction, and also helping to stir the water body to improve the contact efficiency between wastewater and biological filler, thereby accelerating the biodegradation process.

[0033] It should be noted that the several biological filler plates 601 are several independent modules, each of which can be independently installed and disassembled. The handle 604 connected to the front side of the biological filler plate 601 can be used to facilitate the user to pull the biological filler plate 601 out of the bioreactor chamber 3, which helps to quickly replace damaged or aged biological filler plates 601 and reduce maintenance costs and time. The aeration head 702 on the aeration plate 701 is a structure with adjustable angle to achieve more uniform aeration distribution and improve oxygen utilization and aeration effect.

[0034] Example 3

[0035] See also Figure 1 and Figure 2 Example 3 is described. This embodiment further illustrates Example 2. In the figure, a water inlet 14 and a drain outlet 15 are provided on the right side of the water tank 9. A water suction pump 16 is fixedly installed on the top of the mounting plate 8. The input end of the water suction pump 16 is connected to the top of the aeration chamber 4 through a pipe, and the output end of the water suction pump 16 is connected to the water inlet 14 through a pipe.

[0036] Furthermore, a connecting pipe 17 for connecting the biological reaction chamber 3 with the aeration chamber 4 is connected to the top of the partition plate 2. An air cap 18 is also connected to the top of the treatment box 1. The bottom end of the air cap 18 is connected to the biological reaction chamber 3.

[0037] In this embodiment, the water tank 9 is used to store qualified wastewater. The water suction pump 16 is powered on to transport the qualified wastewater at the top of the aeration chamber 4 to the water inlet 14 opened on the right side of the water tank 9, and discharge the treated qualified wastewater through the drain port 15. The air cap 18 on the top of the treatment box 1 can maintain the liquid level in the aeration chamber 4 and prevent gas overflow.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biological denitrification treatment device for mixed acid pickling wastewater, comprising a treatment box (1), characterized in that: A partition plate (2) is fixedly connected to the inner cavity of the treatment box (1), and the partition plate (2) divides the inner cavity of the treatment box (1) into a biological reaction chamber (3) and an aeration chamber (4) on the left and right. A sedimentation chamber (5) is provided at the bottom of the biological reaction chamber (3) and the aeration chamber (4). A biological treatment mechanism (6) is connected to the biological reaction chamber (3), and an aeration mechanism (7) is connected to the bottom of the aeration chamber (4). A mounting plate (8) is fixedly connected to the top of the treatment box (1), and a water tank (9) is connected to the left side of the mounting plate (8). A shunt pipe (10) is provided on the left side of the water tank (9). The bottom end of the shunt pipe (10) passes through the treatment box (1) and extends into the biological reaction chamber (3). A reflux pump (11) is fixedly installed on the right side wall of the treatment box (1).

2. A biological denitrification treatment device for mixed acid pickling wastewater according to claim 1, characterized in that: The top end of the diversion pipe (10) is connected to a water inlet pipe (12) and a return pipe (13) in sequence from top to bottom. The return pipe (13) is connected to the output end of the return pump (11) through a pipeline. The input end of the return pump (11) is connected to the sedimentation chamber (5).

3. The biological denitrification treatment device for mixed acid pickling wastewater according to claim 1, characterized in that: The biological treatment mechanism (6) comprises a plurality of biological filler plates (601), a connecting block (602), a draw plate (603) and a handle (604). The biological filler plates (601) are embedded in the biological reaction chamber (3). The front side of the biological filler plates (601) is fixedly connected to the connecting block (602). The connecting block (602) passes through the front side of the treatment box (1) and is fixedly connected to the draw plate (603). The front side of the draw plate (603) is fixedly connected to the handle (604).

4. The biological denitrification treatment device for mixed acid pickling wastewater according to claim 1, characterized in that: The aeration mechanism (7) comprises an aeration plate (701), an aeration head (702) and a fan (703); the aeration plate (701) is fixedly connected to the bottom of the aeration chamber (4); a plurality of aeration heads (702) are fixedly installed at equal intervals on the aeration plate (701); the fan (703) is fixedly installed on the mounting plate (8); and the output end of the fan (703) is connected to the aeration head (702) on the aeration plate (701) through a pipeline.

5. The biological denitrification treatment device for mixed acid pickling wastewater according to claim 1, characterized in that: A water inlet (14) and a drain outlet (15) are provided on the right side of the water tank (9), and a water suction pump (16) is fixedly installed on the top of the mounting plate (8). The input end of the water suction pump (16) is connected to the top of the aeration chamber (4) through a pipeline, and the output end of the water suction pump (16) is connected to the water inlet (14) through a pipeline.

6. The biological denitrification treatment device for mixed acid pickling wastewater according to claim 1, characterized in that: The top of the partition plate (2) is connected to a connecting pipe (17) for connecting the biological reaction chamber (3) with the aeration chamber (4), and the top of the treatment box (1) is also connected to an air cap (18), the bottom end of the air cap (18) is connected to the biological reaction chamber (3).

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