Acid-alkali wastewater neutralizing and discharging device

Abstract

The acid-alkali wastewater neutralizing and discharging device comprises an acid wastewater tank and an alkali wastewater tank, an acid inlet pipe is arranged at the top of the acid wastewater tank, an acid outlet pipe is arranged at the bottom of the acid wastewater tank, an alkali inlet pipe is arranged at the top of the alkali wastewater tank, an alkali outlet pipe is arranged at the bottom of the alkali wastewater tank, and the acid outlet pipe and the alkali outlet pipe are communicated through a three-way pipe. The output end of the three-way pipe is provided with a horizontal section neutralizing pipe, the horizontal section neutralizing pipe is connected with a vertical section neutralizing pipe through a bent pipe, a neutralizing tank is arranged below the vertical section neutralizing pipe, the side wall of the neutralizing tank is provided with a liquid discharging pipe which is communicated with the inside and the outside, the horizontal section neutralizing pipe is internally provided with a spiral mixer, and the spiral mixer is connected with the vertical section neutralizing pipe. The outer wall of the spiral mixer is fixedly and hermetically connected with the inner wall of the horizontal section neutralizing pipe; the acid-alkali wastewater neutralization and discharge device can realize mixing and neutralization of acid-alkali wastewater in the pipeline during use, is stable in overall structure and high in mixing efficiency, can meet the wastewater discharge requirement, and is suitable for popularization and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical wastewater treatment, and particularly relates to an acid-alkali wastewater neutralization and discharge device. BACKGROUND

[0002] In the industrial production process, a large amount of acidic wastewater and alkaline wastewater will be generated. If these wastewaters are directly discharged, they will cause serious pollution to the ecological environment such as water bodies and soil, and also damage the drainage pipes and related equipment.

[0003] At present, the commonly used acid-alkali wastewater treatment method is to introduce the acid-alkali wastewater into a neutralization tank for mixing and neutralization. However, the existing neutralization device has many deficiencies. On the one hand, the acid-alkali wastewater is not uniformly mixed in the mixing process, resulting in insufficient neutralization reaction and difficulty in reaching the discharge standard of the pH value of the neutralized wastewater. On the other hand, the wastewater level control in the neutralization tank is not accurate enough, which can easily cause the wastewater to overflow or not be completely discharged, affecting the treatment efficiency and environmental safety. In addition, the structure design of the existing device is not reasonable enough, and lacks necessary safety protection measures, which poses a safety hazard to the operators in the operation and maintenance process.

[0004] Therefore, there is an urgent need for an acid-alkali wastewater neutralization and discharge device that is uniformly mixed, accurately controlled in liquid level and high in safety, to solve the problems existing in the prior art. SUMMARY

[0005] The purpose of the present application is to provide an acid-alkali wastewater neutralization and discharge device that can realize the mixing and neutralization of acid-alkali wastewater in the pipeline, has stable overall structure, high mixing efficiency and can meet the wastewater discharge requirements when in use.

[0006] To achieve the above purpose, the technical scheme of the present application is as follows: an acid-alkali wastewater neutralization and discharge device, comprising an acid wastewater tank and an alkali wastewater tank, a fence is arranged on the top of the acid wastewater tank and the alkali wastewater tank, an acid inlet pipe is arranged on the top of the acid wastewater tank, an acid outlet pipe is arranged at the bottom of the acid wastewater tank, an alkali inlet pipe is arranged on the top of the alkali wastewater tank, and an alkali outlet pipe is arranged at the bottom of the alkali wastewater tank, the acid outlet pipe and the alkali outlet pipe are connected through a tee pipe, a horizontal section neutralization pipe is arranged at the output end of the tee pipe, a vertical section neutralization pipe is connected to the horizontal section neutralization pipe through an elbow pipe, a neutralization tank is arranged below the vertical section neutralization pipe, and a liquid discharge pipe that communicates between the inside and outside is arranged on the side wall of the neutralization tank.

[0007] Preferably, a spiral mixer is arranged in the horizontal section neutralization pipe, the outer wall of the spiral mixer is fixedly and sealingly connected to the inner wall of the horizontal section neutralization pipe, and a liquid flow hole is arranged at the center of the cross section of the spiral mixer.

[0008] Preferably, the elbow extends vertically into the vertical neutralization pipe, and multiple sets of liquid neutralization mechanisms are provided inside the vertical neutralization pipe. Each liquid neutralization mechanism includes a flow-blocking hood and a flow-collecting hood, both of which are conical and arranged in opposite directions. The outer circumference of the flow-blocking hood and the flow-collecting hood are sealed and fixedly connected to the inner wall of the vertical neutralization pipe.

[0009] Preferably, the conical head of the flow-blocking shroud is positioned upwards, and the circumferential array of the flow-blocking shroud is provided with multiple sets of arc-shaped grooves; the conical head of the flow-collecting shroud is positioned downwards, and a through hole is provided at the center of the flow-collecting shroud, so that the mixed liquid in the horizontal section neutralization pipe enters the neutralization tank sequentially through the elbow, the arc-shaped grooves and the through hole.

[0010] Preferably, both the acid wastewater tank and the alkaline wastewater tank are fixedly installed on a fixed platform, and ladders are provided on both sides of the fixed platform.

[0011] Preferably, the neutralization tank is provided with a partition wall, which divides the neutralization tank into an equalization tank and a discharge tank. The vertical neutralization pipe is located directly above the equalization tank, and the discharge pipe is connected to the discharge tank.

[0012] Preferably, the drain pipe is equipped with a solenoid valve, which is used to control the opening and closing of the drain pipe.

[0013] Preferably, a lifting gate is provided inside the partition wall, and a rotatable lead screw is provided at the top of the lifting gate. The lead screw passes through the gantry frame and is connected to the servo motor. The lead screw and the gantry frame are connected by threads. After the servo motor runs, it drives the lifting gate to rise and fall inside the partition wall.

[0014] Preferably, an overflow pool is also provided on the other side of the neutralization pool, and the overflow pool is connected to the neutralization pool through a connecting pipe.

[0015] Preferably, the inner walls of both the neutralization tank and the overflow tank are provided with an anti-corrosion coating, which is any one or more combinations of epoxy resin coating, polyurea anti-corrosion coating, and polytetrafluoroethylene coating.

[0016] Compared with the prior art, the acid-base wastewater neutralization and discharge device disclosed in this invention has the following beneficial effects:

[0017] 1. Good mixing uniformity: By setting up a spiral mixer, flow obstruction hood and flow collection hood, the present invention can fully mix acid and alkaline wastewater in two stages: horizontal conveying and vertical falling. This effectively solves the problem of uneven mixing in existing devices, ensures that the neutralization reaction is fully carried out, and makes the pH value of the neutralized wastewater stably meet the discharge standards.

[0018] 2. Precise liquid level control: The liquid level control system, composed of a servo motor, lead screw, and lifting gate, can precisely adjust the liquid level in each chamber of the neutralization tank, preventing wastewater overflow or incomplete discharge, thus improving wastewater treatment efficiency and environmental safety.

[0019] 3. High safety: The fence can prevent unauthorized personnel from approaching the critical components of the equipment, and the fixed platform and ladder provide a safe operating and maintenance platform for workers, reducing the safety risks to workers during the operation.

[0020] 4. Reasonable structure and strong practicality: This invention can achieve secondary mixing and neutralization of wastewater in the pipeline, thereby improving the neutralization efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an acid-base wastewater neutralization and discharge device according to the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the overall structure of an acid-base wastewater neutralization and discharge device according to the present invention. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the overall structure of an acid-base wastewater neutralization and discharge device according to the present invention. Figure 3 .

[0024] Figure 4 This is a schematic diagram of the internal structure of the horizontal and vertical neutralization pipes in an acid-base wastewater neutralization and discharge device according to the present invention. Figure 1 .

[0025] Figure 5 This is a schematic diagram of the internal structure of the horizontal and vertical neutralization pipes in an acid-base wastewater neutralization and discharge device according to the present invention. Figure 2 .

[0026] Figure 6 This invention relates to an acid-base wastewater neutralization and discharge device. Figure 4 A magnified structural diagram of point A in the middle.

[0027] Figure 7 This invention relates to an acid-base wastewater neutralization and discharge device. Figure 4 A magnified structural diagram at point B in the middle.

[0028] In the diagram: 1. Acid wastewater tank; 11. Acid inlet pipe; 12. Acid outlet pipe; 2. Alkali wastewater tank; 21. Alkali inlet pipe; 22. Alkali outlet pipe; 3. Fence; 4. T-joint; 5. Horizontal neutralization pipe; 51. Spiral mixer; 6. Elbow; 7. Vertical neutralization pipe; 71. Flow baffle; 711. Arc-shaped groove; 72. Flow collector; 721. Through hole; 8. Fixed platform; 81. Ladder; 9. Neutralization tank; 91. Partition wall; 92. Lifting gate; 93. Lead screw; 94. Servo motor; 95. Drain pipe; 10. Overflow tank. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0030] Please refer to Figures 1-7 An acid-base wastewater neutralization and discharge device includes an acid wastewater tank 1 and an alkaline wastewater tank 2. Both tanks are equipped with a fence 3 on top. The acid wastewater tank 1 has an acid inlet pipe 11 at its top and an acid outlet pipe 12 at its bottom. The alkaline wastewater tank 2 has an alkali inlet pipe 21 at its top and an alkali outlet pipe 22 at its bottom. The acid inlet pipe 11 receives the generated acidic wastewater, and the acid outlet pipe 12 discharges the acidic wastewater. Similarly, the alkali inlet pipe 21 and the alkali outlet pipe 22 are used for the inlet and outlet of alkaline wastewater. The acid outlet pipe 12 and the alkali outlet pipe 22 are connected by a T-junction pipe 4. The output end of the T-junction pipe 4 is equipped with a horizontal neutralization pipe 5. The horizontal neutralization pipe 5 is connected to a vertical neutralization pipe 7 via a bend pipe 6. A neutralization tank 9 is located below the vertical neutralization pipe 7, and a drain pipe 95 with internal and external connections is provided on the side wall of the neutralization tank 9.

[0031] During use, the acid and alkali wastewater in acid wastewater tank 1 and alkali wastewater tank 2 can flow into the tee pipe 4 through their respective pipelines by gravity. After entering, the acid and alkali wastewater are first neutralized and mixed in the horizontal section neutralization pipe 5, and then enter the vertical section neutralization pipe 7 through the elbow 6. The wastewater undergoes secondary neutralization and mixing in the vertical section neutralization pipe 7, and finally enters the neutralization tank for discharge.

[0032] In this embodiment, a spiral mixer 51 is provided inside the horizontal section neutralization pipe 5. The outer wall of the spiral mixer 51 is fixedly and sealed to the inner wall of the horizontal section neutralization pipe 5. A flow hole is provided at the center of the cross-section of the spiral mixer 51.

[0033] In other words, the spiral mixer 51 is hollow and spiral-shaped, which can be understood as an auger. After the acid and alkaline wastewater enters the horizontal neutralization pipe 5 and comes into contact with the spiral mixer 51, the mixed liquid will enter the vertical neutralization pipe 7 layer by layer around the spiral channel. During this process, it will continuously contact the inner wall of the spiral, which can greatly improve the mixing effect of the acid and alkaline wastewater and improve the neutralization efficiency.

[0034] Furthermore, the elbow 6 extends vertically into the vertical neutralization pipe 7. The vertical neutralization pipe 7 is provided with multiple sets of liquid neutralization mechanisms. The liquid neutralization mechanism includes a flow-blocking shroud 71 and a flow-collecting shroud 72. Both the flow-blocking shroud 71 and the flow-collecting shroud 72 are conical and are arranged opposite to each other. The outer circumference of the flow-blocking shroud 71 and the flow-collecting shroud 72 are sealed and fixedly connected to the inner wall of the vertical neutralization pipe 7.

[0035] Specifically, the conical head of the flow-blocking shroud 71 is set upward, and the circumferential array of the flow-blocking shroud 71 is provided with multiple sets of arc-shaped grooves 711; the conical head of the flow-collecting shroud 72 is set downward, and a through hole 721 is provided at the center of the flow-collecting shroud 72. The mixed liquid in the horizontal section neutralization pipe 5 enters the neutralization tank 9 by passing through the bend 6, the arc-shaped grooves 711 and the through hole 721 in sequence.

[0036] When the acid-base mixed wastewater first passes through the (cone-headed) flow-blocking shroud 71, the cone of the flow-blocking shroud 71 will cause the mixed wastewater to diffuse in a circumferential direction. The diffused wastewater will flow downward through the arc-shaped slot 711 and enter the collecting shroud 72. Since the cone of the collecting shroud 72 is downward, the internal wastewater can be collected and finally discharged together through the through hole 721.

[0037] During the process, the acid-base neutralization wastewater circulates and diffuses within the vertical neutralization pipe 7, and the flow direction of the acid-base neutralization wastewater is changed multiple times, which can greatly improve the mixing efficiency of the two to maximize the neutralization effect and make the wastewater meet the discharge requirements.

[0038] In this embodiment, the acid wastewater tank 1 and the alkali wastewater tank 2 are higher than the neutralization tank 9. The purpose of this is to allow the wastewater to flow from top to bottom. The entire process does not require a power source, thus achieving an energy-saving effect. The acid wastewater tank 1 and the alkali wastewater tank 2 are both fixedly installed on the fixed platform 8. Ladders 81 are provided on both sides of the fixed platform 8 to facilitate the maintenance of the tanks by the staff.

[0039] Based on the above embodiments, a partition wall 91 is provided inside the neutralization tank 9, which divides the neutralization tank 9 into an adjustment tank and a discharge tank. The vertical neutralization pipe 7 is located directly above the adjustment tank, and the drain pipe 95 is connected to the discharge tank.

[0040] After secondary mixing and neutralization, the wastewater first enters the equalization tank. Staff test the wastewater in the tank to determine whether its pH value meets the discharge requirements. If it meets the discharge requirements, it is discharged directly. If it does not meet the discharge requirements, chemicals need to be added to the equalization tank to adjust the pH value again through artificial intervention. The ultimate goal is to ensure that the pH value meets the discharge requirements.

[0041] The drain pipe 95 is equipped with a solenoid valve, which is used to control the opening and closing of the drain pipe.

[0042] To meet the requirements for blocking and discharging wastewater in the regulating tank, a lifting gate 92 is installed inside the partition wall 91. The top of the lifting gate 92 is equipped with a rotatable lead screw 93. The lead screw 93 passes through the gantry frame and is connected to the servo motor 94. The lead screw 93 and the gantry frame 94 are connected by threads. The bottom end of the lead screw is connected to the surface of the lifting gate through a bearing. The bearing is fixed at the center of the surface of the lifting gate. After the servo motor 94 is running, it drives the lifting gate 92 to rise and fall inside the partition wall 9.

[0043] When the lifting gate 92 is closed, the wastewater in the regulating tank cannot enter the discharge tank. At this time, it can be used for wastewater detection or regulation. When discharge is required, the servo motor 94 can be started to allow the wastewater in the regulating tank to enter the discharge tank and finally be discharged at the drain pipe 95.

[0044] As a preferred embodiment, an overflow tank 10 is also provided on the other side of the neutralization tank 9. The overflow tank 10 is connected to the neutralization tank 9 through a connecting pipe. When the liquid level in the neutralization tank 9 is too high, the wastewater will flow into the overflow tank 10 through the connecting pipe to avoid wastewater overflow and polluting the environment.

[0045] Based on the above embodiments, the inner walls of the neutralization tank 9 and the overflow tank 10 are provided with anti-corrosion coatings, which are any one or more combinations of epoxy resin coatings, polyurea anti-corrosion coatings, and polytetrafluoroethylene coatings.

[0046] Understandably, since the entire device is used for the neutralization and discharge of acidic and alkaline wastewater, the wastewater tank, neutralization pipe, and various internal components are all coated with anti-corrosion coatings to prevent the service life from being shortened due to wastewater corrosion.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An acid-base wastewater neutralization and discharge device, comprising an acid wastewater tank and an alkali wastewater tank, both of which are equipped with enclosures on their tops. The acid wastewater tank has an acid inlet pipe at its top and an acid outlet pipe at its bottom. The alkali wastewater tank has an alkali inlet pipe at its top and an alkali outlet pipe at its bottom. The acid outlet pipe and the alkali outlet pipe are connected by a T-junction pipe. A horizontal neutralization pipe is provided at the output end of the T-junction pipe. The horizontal neutralization pipe is connected to a vertical neutralization pipe via a bend. A neutralization tank is provided below the vertical neutralization pipe. A drain pipe with internal and external connections is provided on the side wall of the neutralization tank.

2. The acid-base wastewater neutralization and discharge device according to claim 1, characterized in that, A spiral mixer is installed inside the horizontal section neutralization pipe. The outer wall of the spiral mixer is fixedly and sealed to the inner wall of the horizontal section neutralization pipe. A flow hole is provided at the center of the cross-section of the spiral mixer.

3. The acid-base wastewater neutralization and discharge device according to claim 1 or 2, characterized in that, The elbow extends vertically into the vertical neutralization pipe. Multiple sets of liquid neutralization mechanisms are provided inside the vertical neutralization pipe. Each liquid neutralization mechanism includes a flow-blocking hood and a flow-collecting hood. Both the flow-blocking hood and the flow-collecting hood are conical and arranged in opposite directions. The outer circumference of the flow-blocking hood and the flow-collecting hood are sealed and fixedly connected to the inner wall of the vertical neutralization pipe.

4. The acid-base wastewater neutralization and discharge device according to claim 3, characterized in that, The conical head of the flow-blocking hood is set upward, and the circumferential array of the flow-blocking hood is provided with multiple sets of arc-shaped grooves; the conical head of the flow-collecting hood is set downward, and a through hole is provided at the center of the flow-collecting hood. The mixed liquid in the horizontal section neutralization pipe enters the neutralization tank in sequence through the elbow, the arc-shaped groove and the through hole.

5. The acid-base wastewater neutralization and discharge device according to claim 1, characterized in that, Both the acid wastewater tank and the alkaline wastewater tank are fixedly installed on a fixed platform, and ladders are provided on both sides of the fixed platform.

6. The acid-base wastewater neutralization and discharge device according to claim 1, characterized in that, The neutralization tank is equipped with a partition wall, which divides the neutralization tank into an equalization tank and a discharge tank. The vertical neutralization pipe is located directly above the equalization tank, and the discharge pipe is connected to the discharge tank.

7. The acid-base wastewater neutralization and discharge device according to claim 6, characterized in that, The drain pipe is equipped with a solenoid valve, which is used to control the opening and closing of the drain pipe.

8. The acid-base wastewater neutralization and discharge device according to claim 6 or 7, characterized in that, A lifting gate is installed inside the partition wall. The top of the lifting gate is equipped with a rotatable screw rod. The screw rod passes through the gantry frame and is connected to a servo motor. The screw rod and the gantry frame are connected by threads. After the servo motor runs, it drives the lifting gate to rise and fall inside the partition wall.

9. The acid-base wastewater neutralization and discharge device according to claim 1, characterized in that, An overflow pool is also provided on the other side of the neutralization pool, and the overflow pool is connected to the neutralization pool through a connecting pipe.

10. The acid-base wastewater neutralization and discharge device according to claim 9, characterized in that, The inner walls of both the neutralization tank and the overflow tank are provided with anti-corrosion coatings, which are any one or more combinations of epoxy resin coatings, polyurea anti-corrosion coatings, and polytetrafluoroethylene coatings.

Images