Cold-rolled stainless steel production wastewater treatment equipment

Abstract

The utility model discloses cold-rolled stainless steel production wastewater treatment equipment which comprises a settling box, a flocculation medicine box, a stirrer and a medicine mixing mechanism, the flocculation medicine box is fixed on one side of a box body of the settling box in an intercommunication manner, and the stirrer extending into the box is mounted at a top frame plate of the flocculation medicine box; a medicine mixing mechanism is arranged at the flocculation medicine box on one side of the settling box, the medicine mixing mechanism is provided with an aeration structure and an ultrasonic mixing assisting structure at the flocculation medicine box, and the aeration structure can introduce gas to upwelling bubbles in the flocculation medicine box, so that the cold-rolled stainless steel production wastewater and a flocculation medicine are contacted and mixed in the flocculation medicine box by virtue of upwelling bubbles during aeration; an ultrasonic mixing assisting structure of the chemical mixing mechanism can transmit ultrasonic waves into the cold-rolled stainless steel production wastewater, the cold-rolled stainless steel production wastewater and the flocculation chemical can be well contacted and mixed under the ultrasonic cavitation effect, and efficient flocculation mixing of the cold-rolled stainless steel production wastewater and the flocculation chemical is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology for cold-rolled stainless steel, and in particular to a wastewater treatment device for cold-rolled stainless steel production. Background Technology

[0002] Wastewater generated during stainless steel production contains harmful substances such as heavy metal ions, grease, acids, and alkalis, causing serious environmental impacts; therefore, its treatment is particularly important. The stainless steel wastewater treatment process typically includes multiple stages, such as a pretreatment system, a reverse osmosis system, and an MVR evaporation system. The pretreatment system removes large suspended solids and heavy metals through coagulation sedimentation, an A / O-MBR stage, and multi-stage filtration. The reverse osmosis system and MVR evaporation system are used for advanced treatment and wastewater concentration to achieve zero discharge. Furthermore, the stainless steel pickling wastewater treatment process includes neutralization, chemical precipitation, membrane separation technology, and biological treatment to remove metal ions and organic matter from the acidic wastewater, ensuring that the effluent quality meets the required standards.

[0003] Currently, when treating wastewater from cold-rolled stainless steel production using chemical precipitation, chemical flocculants are typically added to the dosing tank of the wastewater sedimentation tank. The wastewater mixes with the flocculants in the dosing tank using a motor-driven stirring mechanism. The mixed wastewater then enters the sedimentation zone of the sedimentation tank, where dissolved substances are converted into insoluble substances and precipitated at the bottom. However, the dosing tank of the wastewater sedimentation tank usually uses a simple blade stirring structure to mix the chemical flocculants and wastewater. This stirring method results in low mixing efficiency between the chemical flocculants and wastewater, thus affecting the mixing reaction efficiency of the cold-rolled stainless steel production wastewater and the chemical flocculants. Therefore, we propose a wastewater treatment device for cold-rolled stainless steel production. Utility Model Content

[0004] The main objective of this invention is to provide a wastewater treatment device for cold-rolled stainless steel production. A mixing mechanism is installed at the flocculant tank on one side of the sedimentation tank. This mixing mechanism incorporates an aeration structure and an ultrasonic mixing aid structure at the flocculant tank. During the flocculation and mixing of the cold-rolled stainless steel production wastewater and flocculant in the flocculant tank, the aeration structure introduces air bubbles that rise within the tank, allowing the wastewater and flocculant to come into contact and mix thanks to the rising air bubbles. Furthermore, the ultrasonic mixing aid structure transmits ultrasonic waves into the wastewater, enabling better contact and mixing of the wastewater and flocculant under ultrasonic cavitation. Combined with the existing mixer in the flocculant tank, this achieves highly efficient flocculation and mixing of the wastewater and flocculant, effectively solving the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A wastewater treatment device for cold-rolled stainless steel production includes a sedimentation tank, a flocculant tank, and a mixer. The flocculant tank is fixedly connected to one side of the sedimentation tank, and a mixer extending into the tank is installed on the top shelf of the flocculant tank. The device also includes a mixing mechanism, which comprises an air inlet pipe, a bend plate, a threaded connector, an aeration bottom pipe, a bend inlet pipe, an L-shaped extension plate, a strip box, studs, and an ultrasonic vibrator. An air inlet pipe is secured to the inner wall of the flocculant tank on the side away from the mixer by a bend plate, and a threaded connector is welded to the upper opening of the air inlet pipe. An aeration bottom pipe is welded to the lower opening of the air intake pipe, and a bent guide pipe is fixed to the long pipe surface of the aeration bottom pipe. Vertical air holes are opened on the pipe wall surface of the bent guide pipe. A strip box is placed on the inner wall of the flocculant tank away from the mixer, and an L-shaped plate is welded to the outer wall of the upper box of the strip box. The L-shaped plate is stuck on the top of the box wall of the flocculant tank, and the vertical plate of the L-shaped plate is locked to the outer box wall of the flocculant tank by bolts. A stud is welded to the inner box wall of the strip box facing the mixer, and an ultrasonic vibrator is screwed on the stud.

[0007] Furthermore, the short plate of the L-shaped ramp presses against the top of the flocculant tank, and mounting holes for screw bolts are provided on the vertical plate of the L-shaped ramp and the tank wall of the flocculant tank.

[0008] By adopting the above technical solution, the L-shaped ramp plate is supported by pressing the short plate body against the top of the flocculant tank, and then the vertical plate body of the L-shaped ramp plate can be locked to the outer wall of the flocculant tank by means of bolts.

[0009] Furthermore, the vertical pipe body of the bent pipe is vertically welded to the pipe wall surface of the aeration bottom pipe, and two sets of vertical air holes are opened on the surface of the bent pipe.

[0010] By adopting the above technical solution, after the bent pipe is welded at the aeration bottom pipe, the gas at the aeration bottom pipe can be discharged outward from the vertical air hole of the bent pipe.

[0011] Furthermore, a gap is reserved between the bent guide pipe, the aeration bottom pipe and the air intake pipe and the mixing blades of the mixer;

[0012] By adopting the above technical solution, the mixing blades of the mixer will not damage the bent guide pipe, aeration bottom pipe and air intake pipe when they rotate.

[0013] Furthermore, a gap is reserved between the box wall into which the strip box is inserted and the stirring blade of the mixer;

[0014] By adopting the above technical solution, the mixing blades of the mixer will not damage the strip box when they rotate.

[0015] Furthermore, the height of the box opening after the strip box is installed at the flocculant tank is higher than the height of the flocculant tank opening;

[0016] By adopting the above technical solution, the opening of the strip box is higher than the opening of the flocculant tank, making it difficult for sewage to enter the strip box.

[0017] Furthermore, an air inlet pipe is inserted between the bent plate and the flocculant tank, and the two sides of the bent plate are locked to the flocculant tank by bolts.

[0018] By adopting the above technical solution, after the elbow plate is bolted to the flocculation tank, the air intake pipe can be pressed tightly against the flocculation tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model provides a mixing mechanism at the flocculation tank on one side of the sedimentation tank. The mixing mechanism is equipped with an aeration structure and an ultrasonic mixing aid structure at the flocculation tank. When the cold-rolled stainless steel production wastewater and flocculant are flocculated and mixed in the flocculation tank, the aeration structure can introduce gas bubbles to rise in the flocculation tank, so that the cold-rolled stainless steel production wastewater and flocculant can come into contact and mix in the flocculation tank by means of the rising bubbles during aeration.

[0021] Furthermore, the ultrasonic mixing structure of the mixing mechanism can transmit ultrasonic waves into the cold-rolled stainless steel production wastewater. Under the action of ultrasonic cavitation, the cold-rolled stainless steel production wastewater and flocculant can come into better contact and mix. At the same time, in conjunction with the original agitator in the flocculant tank, the cold-rolled stainless steel production wastewater and flocculant can be efficiently flocculated and mixed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a wastewater treatment device for cold-rolled stainless steel production according to this utility model.

[0023] Figure 2 This is an exploded view of the mixing mechanism of a wastewater treatment device for cold-rolled stainless steel production according to this utility model.

[0024] Figure 3 This utility model relates to the disassembly of the bar box and ultrasonic vibrator in a wastewater treatment device for cold-rolled stainless steel production.

[0025] Figure 4 This is a schematic diagram of the bent pipe structure of a wastewater treatment equipment for cold-rolled stainless steel production according to this utility model.

[0026] In the diagram: 1. Sedimentation tank; 2. Flocculation tank; 3. Mixer; 4. Mixing mechanism; 5. Air inlet pipe; 6. Bent plate; 7. Threaded joint; 8. Aeration bottom pipe; 9. Bent inlet pipe; 10. Vertical air hole; 11. L-shaped plate; 12. Strip box; 13. Stud; 14. Ultrasonic vibrator. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1-4 As shown, a wastewater treatment device for cold-rolled stainless steel production includes a sedimentation tank 1, a flocculant tank 2, and a mixer 3. The flocculant tank 2 is fixedly connected to one side of the sedimentation tank 1, and the mixer 3, extending into the tank, is installed on the top frame of the flocculant tank 2. The device also includes a mixing mechanism 4, which comprises an air intake pipe 5, a bent plate 6, a threaded connector 7, an aeration bottom pipe 8, a bent intake pipe 9, an L-shaped plate 11, a strip box 12, a stud 13, and an ultrasonic vibrator 14. The air intake pipe 5 is locked to the inner wall of the flocculant tank 2 on the side away from the mixer 3 by the bent plate 6, and the threaded connector 7 is welded to the upper opening of the air intake pipe 5. An aeration bottom pipe 8 is welded to the lower opening of the air intake pipe 5, and a bent guide pipe 9 is fixed to the long pipe surface of the aeration bottom pipe 8. A vertical air hole 10 is opened on the pipe wall surface of the bent guide pipe 9. A strip box 12 is placed on the inner wall of the flocculant tank 2 away from the mixer 3, and an L-shaped plate 11 is welded to the outer wall of the upper box of the strip box 12. The L-shaped plate 11 is stuck on the top of the box wall of the flocculant tank 2, and the vertical plate of the L-shaped plate 11 is locked to the outer box wall of the flocculant tank 2 by bolts. A stud 13 is welded to the inner box wall of the strip box 12 facing the mixer 3, and an ultrasonic vibrator 14 is screwed onto the stud 13.

[0029] The short plate of the L-shaped plate 11 is pressed on the top of the flocculant tank 2, and the vertical plate of the L-shaped plate 11 and the tank wall of the flocculant tank 2 are provided with mounting holes for screw bolts.

[0030] By adopting the above technical solution, the L-shaped plate 11 is supported by pressing the short plate body against the top of the flocculant tank 2, and then the vertical plate body of the L-shaped plate 11 can be locked with the outer wall of the flocculant tank 2 by means of bolts.

[0031] The vertical pipe body of the bent pipe 9 is vertically welded to the pipe wall surface of the aeration bottom pipe 8, and two sets of vertical air holes 10 are provided on the surface of the bent pipe 9.

[0032] By adopting the above technical solution, after the bent pipe 9 is welded at the aeration bottom pipe 8, the gas at the aeration bottom pipe 8 can be discharged outward from the vertical air hole 10 of the bent pipe 9.

[0033] The curved guide pipe 9, the aeration bottom pipe 8, and the air intake pipe 5 are spaced apart from the mixing blades of the mixer 3.

[0034] By adopting the above technical solution, the mixing blades of the mixer 3 will not damage the bent pipe 9, the aeration bottom pipe 8, and the air intake pipe 5 when they rotate.

[0035] The strip box 12 is inserted into the box wall of the flocculant tank 2 and there is a reserved gap between it and the stirring blade of the mixer 3.

[0036] By adopting the above technical solution, the mixing blades of the mixer 3 will not damage the strip box 12 when they rotate.

[0037] Wherein, the height of the box opening of the strip box 12 after installation at the flocculant tank 2 is higher than the height of the tank opening of the flocculant tank 2;

[0038] By adopting the above technical solution, the opening of the strip box 12 is higher than the opening of the flocculant tank 2, making it difficult for sewage to enter the strip box 12.

[0039] The air inlet pipe 5 is inserted between the bent buckle plate 6 and the flocculation tank 2, and the two sides of the bent buckle plate 6 are locked to the flocculation tank 2 by bolts.

[0040] By adopting the above technical solution, after the elbow plate 6 is locked to the flocculation tank 2 with bolts, the air inlet pipe 5 can be pressed tightly to the flocculation tank 2.

[0041] It should be noted that this utility model is a wastewater treatment device for cold-rolled stainless steel production. A mixing mechanism 4 is set at the flocculation tank 2 on one side of the sedimentation tank 1. The bent plate 6 of the mixing mechanism 4 can be locked to the flocculation tank 2 with bolts. Then, the bent plate 6 can clamp the air pipe 5 and fix it inside the flocculation tank 2. At the same time, the L-shaped plate 11 presses the top of the flocculation tank 2 with its short plate body to obtain support. Then, the vertical plate of the L-shaped plate 11 can be locked to the outer wall of the flocculation tank 2 with bolts. The L-shaped plate 11 can provide support for the strip box 12. The stud 13 inside the strip box 12 is screwed to install the ultrasonic vibrator 14. The ultrasonic vibrator 14 can be connected to an external ultrasonic generator for control. When the ultrasonic generator can control the ultrasonic vibrator 14 to emit ultrasonic waves into the flocculation tank 2 at the strip box 12, the threaded joint 7 can be connected to the external... The gas supply pipe allows gas to enter the aeration bottom pipe 8 through the threaded joint 7 and the air inlet pipe 5. The gas bubbles outward from the bend inlet pipe 9 of the aeration bottom pipe 8 along the vertical air hole 10. When the cold-rolled stainless steel production wastewater falls into the flocculant tank 2 and flocculants are added, the mixer 3 can be powered normally and use its own stirring blade mechanism to stir the cold-rolled stainless steel production wastewater and flocculants. At the same time, gas rises from the flocculant tank 2 to promote contact between the cold-rolled stainless steel production wastewater and flocculants. When the ultrasonic waves at the strip box 12 are transmitted into the cold-rolled stainless steel production wastewater, under the action of ultrasonic cavitation, the cold-rolled stainless steel production wastewater and flocculants come into efficient contact and mix. At the same time, under the stirring of the stirring blades of the mixer 3, the cold-rolled stainless steel production wastewater after adding chemicals in the flocculant tank 2 can enter the sedimentation tank 1 through the tank body connection for sedimentation treatment. The settled flocculants can be discharged through the pipe at the bottom of the sedimentation tank 1.

[0042] It should be noted that this utility model is a wastewater treatment device for cold-rolled stainless steel production. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cold-rolled stainless steel production wastewater treatment equipment, comprising a sedimentation tank (1), a flocculating agent tank (2) and a stirrer (3), the tank body of the sedimentation tank (1) is fixed with the flocculating agent tank (2) on one side, and the top shelf of the flocculating agent tank (2) is provided with the stirrer (3) extending into the tank, characterized in that: Also include the mixed medicine mechanism (4), the mixed medicine mechanism (4) includes the air pipe (5), the buckle plate (6), the threaded joint (7), the aeration bottom pipe (8), the bend lead pipe (9), the L-shaped plate (11), the strip box (12), the stud (13) and the ultrasonic vibrator (14), the flocculation medicine box (2) is locked with the air pipe (5) at the inner wall of the side away from the mixer (3) with the buckle plate (6), and the threaded joint (7) is interconnectedly welded on the upper pipe opening of the air pipe (5), the aeration bottom pipe (8) is interconnectedly welded on the lower pipe opening of the air pipe (5), and the bend lead pipe (9) is fixed on the surface of the long pipe body of the aeration bottom pipe (8), the vertical gas hole (10) is formed on the pipe wall surface of the bend lead pipe (9), the strip box (12) is placed at the other side inner wall of the flocculation medicine box (2) away from the mixer (3), and the L-shaped plate (11) is welded on the upper box wall of the strip box (12), the L-shaped plate (11) is clamped at the top end of the box wall of the flocculation medicine box (2), and the vertical plate body of the L-shaped plate (11) and the outer box wall of the flocculation medicine box (2) are locked by bolts, the inner box wall of the strip box (12) is welded with the stud (13) towards the mixer (3), and the ultrasonic vibrator (14) is rotatably connected to the stud (13).

2. The cold-rolled stainless steel production wastewater treatment apparatus according to claim 1, characterized by: The short plate body of the L-shaped plate (11) is pressed on the top of the flocculation medicine box (2), and the vertical plate body of the L-shaped plate (11) and the box wall of the flocculation medicine box (2) are provided with mounting holes for rotatably connecting bolts.

3. A cold rolling stainless steel production wastewater treatment apparatus according to claim 1, characterized in that: The vertical pipe body of the bend lead pipe (9) is vertically welded on the pipe wall surface of the aeration bottom pipe (8), and the vertical gas hole (10) on the surface of the bend lead pipe (9) is provided with two groups.

4. The cold-rolled stainless steel production wastewater treatment apparatus according to claim 1, characterized by: The bend lead pipe (9), the aeration bottom pipe (8) and the air pipe (5) are provided with a spacing distance from the stirring blade of the mixer (3).

5. The cold rolling stainless steel production wastewater treatment apparatus according to claim 1, characterized in that: The strip box (12) is clamped into the spacing distance between the box wall of the flocculation medicine box (2) and the stirring blade of the mixer (3).

6. A cold rolling stainless steel production wastewater treatment apparatus according to claim 1, characterized in that: The box opening height of the strip box (12) after installation in the flocculation medicine box (2) is higher than the tank opening height of the flocculation medicine box (2).

7. The cold rolling stainless steel production wastewater treatment apparatus according to claim 1, characterized in that: The air pipe (5) is clamped between the buckle plate (6) and the flocculation medicine box (2), and the two side plate bodies of the buckle plate (6) are locked with the flocculation medicine box (2) by bolts.

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