Multi-stage purification treatment device for heavy metal industrial wastewater

Abstract

The utility model discloses a multi-stage purification treatment device for heavy metal industrial wastewater. The multi-stage purification treatment device comprises a pretreatment tank and a purification tank, the upper end of the pretreatment tank is fixedly connected with a support plate III, and uniformly distributed magnetic bars are inserted into the upper end of the support plate III; the purification tank is arranged at the rear end of the pretreatment tank, a precipitation mechanism and an ozone purification mechanism are sequentially arranged in the purification tank from front to back, the ozone purification mechanism comprises ozone pipelines and a purification bin, the purification bin is arranged at the rear end of the purification tank, and ozone pipelines which are uniformly distributed are arranged in the purification bin; the multi-stage purification treatment device for the heavy metal industrial wastewater further comprises a control switch group, and the control switch group is arranged on the front side of the purification pond. According to the multi-stage purification treatment device for the heavy metal industrial wastewater, residual fine metal scraps in the industrial wastewater are adsorbed through the pretreatment pond, so that recycling is facilitated; meanwhile, chemical precipitation and ozone purification are combined, so that the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy metal processing, in particular to a multi-stage purification treatment device for heavy metal industrial wastewater. Background Art

[0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged from industrial production processes such as mining, machinery manufacturing, chemical engineering, electronics, and instrumentation. Heavy metal wastewater (such as those containing cadmium, nickel, mercury, and zinc) is one of the most serious environmental pollutants and poses the greatest harm to humans. Its quality and quantity are closely related to the production process. Heavy metals in wastewater generally cannot be decomposed or destroyed; they can only be transferred and their physical and chemical forms transformed.

[0003] Heavy metal wastewater is often treated by chemical precipitation. Heavy metal ions are removed by adding corresponding heavy metal capture agents (such as alum) and flocculants. The heavy metal content in the treated water is lower than the discharge standard and can be discharged or reused.

[0004] However, the composition of heavy metal wastewater is complex, and there may be residual tiny metal debris. After chemical precipitation, all of them are deposited in the sludge and are difficult to separate. At the same time, heavy metal wastewater may also contain substances such as sulfides. The wastewater has an odor, and the treatment process has many steps and may cause secondary pollution, which is more troublesome. For this reason, we propose a multi-stage purification treatment device for heavy metal industrial wastewater. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a multi-stage purification treatment device for heavy metal industrial wastewater. The fine metal debris remaining in the industrial wastewater is adsorbed by the pretreatment tank for easy recycling. At the same time, the efficiency is improved by combining chemical precipitation and ozone purification, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage purification treatment device for heavy metal industrial wastewater, comprising a pretreatment tank and a purification tank;

[0007] Pretreatment tank: The upper end of the pretreatment tank is fixedly connected to the support plate 3, and the upper end of the support plate 3 is plugged with evenly distributed magnetic rods;

[0008] Purification tank: It is arranged at the rear end of the pretreatment tank. The interior of the purification tank is provided with a precipitation mechanism and an ozone purification mechanism from front to back. The ozone purification mechanism includes an ozone pipe and a purification chamber. The rear end of the purification tank is provided with a purification chamber. The interior of the purification chamber is provided with evenly distributed ozone pipes. The air inlet of the ozone pipe is connected to the air outlet of the ozone generator. The fine metal debris remaining in the industrial wastewater is adsorbed by the pretreatment tank for easy recycling. At the same time, the efficiency is improved by combining chemical precipitation and ozone purification.

[0009] Furthermore, it also includes a control switch group, which is arranged on the front side of the purification tank, and the input end of the control switch group is electrically connected to an external power supply to control the on and off of the stirring motor.

[0010] Furthermore, the precipitation mechanism includes a heavy metal capture agent pipeline, a flocculant pipeline, a support plate 1, a stirring motor 1, a partition and a fixed seat. The upper side of the front end of the purification tank is fixedly connected with the heavy metal capture agent pipeline and the flocculant pipeline respectively. A partition is provided in the middle of the purification tank. The upper end of the purification tank is fixedly connected with the support plate 1. The upper end of the support plate 1 is fixedly connected with the stirring motor 1 symmetrically distributed front and back. The stirring motor 1 is located at the front end of the partition. A fixed seat is provided at the rear end of the purification tank. The purification chamber is located at the rear end of the fixed seat. The input end of the stirring motor 1 is electrically connected to the output end of the control switch group to remove heavy metals and impurities.

[0011] Furthermore, the sedimentation mechanism also includes a filter box, the interior of the fixing seat is fixedly connected to the filter box, and the interior of the filter box is provided with evenly distributed inclined through holes to accelerate sedimentation.

[0012] Furthermore, the ozone purification mechanism also includes a support plate 2 and a stirring motor 2. The upper end of the purification chamber is fixedly connected to the support plate 2, and the upper surface of the support plate 2 is fixedly connected to the stirring motor 2 which is evenly distributed. The stirring shafts of the stirring motor 2 are respectively located between two adjacent vertical rows of ozone pipes. An exhaust port is provided at the upper end of the support plate 2. The input end of the stirring motor 2 is electrically connected to the output end of the control switch group to make the ozone and wastewater mixed more fully.

[0013] Furthermore, the ozone purification mechanism also includes a return channel. The upper end of the fixing seat is provided with the return channel, and the return channel is located at the rear end of the filter box.

[0014] Furthermore, an L-shaped sealing plate is fixedly connected to the lower side of the front end of the pretreatment tank to achieve sealing of the purification chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the multi-stage purification treatment device for heavy metal industrial wastewater has the following advantages:

[0016] 1. The magnetic rods in the pretreatment tank can magnetically absorb small metal debris in heavy metal industrial wastewater for easy recycling.

[0017] 2. At the back end of the purification tank, heavy metal capture agents and flocculants are added to mix the sludge and heavy metal ions in the heavy metal industrial wastewater. The clear wastewater is mixed with ozone input through the ozone pipe to achieve decolorization and odor removal of the wastewater. The reaction is rapid, the process is simple, and there is no secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a partial cross-sectional structural diagram of the ozone purification mechanism of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of the pretreatment tank of the utility model.

[0021] In the figure: 1 pretreatment tank, 2 purification tank, 3 sedimentation mechanism, 31 heavy metal capture agent pipeline, 32 flocculant pipeline, 33 support plate 1, 34 stirring motor 1, 35 partition, 36 fixed seat, 37 filter box, 4 ozone purification mechanism, 41 support plate 2, 42 stirring motor 2, 43 ozone pipeline, 44 purification chamber, 45 return channel, 5 control switch group, 6 support plate 3, 7 magnetic rod, 8 L-type sealing plate. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-3 , this embodiment provides a technical solution: a multi-stage purification treatment device for heavy metal industrial wastewater, including a pretreatment tank 1 and a purification tank 2;

[0024] Pretreatment tank 1: The upper end of the pretreatment tank 1 is fixedly connected to a support plate 3 6, and the upper end of the support plate 3 6 is plugged with evenly distributed magnetic rods 7. The lower side of the front end of the pretreatment tank 1 is fixedly connected to an L-shaped sealing plate 8. Heavy metal industrial wastewater is passed into the interior of the pretreatment tank 1. The magnetic rod 7 magnetically absorbs small metal debris in the heavy metal industrial wastewater. After long-term use, the magnetic rod 7 is pulled out, the small metal debris is peeled off, the L-shaped sealing plate 8 is removed, and the interior of the pretreatment tank 1 is rinsed;

[0025] Purification tank 2: It is arranged at the rear end of pretreatment tank 1. The interior of purification tank 2 is provided with precipitation mechanism 3 and ozone purification mechanism 4 in sequence from front to back. Ozone purification mechanism 4 includes ozone pipe 43 and purification chamber 44. Purification chamber 44 is provided at the rear end of purification tank 2. Ozone pipe 43 is evenly distributed inside purification chamber 44. The air inlet of ozone pipe 43 is connected to the air outlet of ozone generator. Ozone purification mechanism 4 also includes support plate 2 41 and stirring motor 2 42. The upper end of purification chamber 44 is fixedly connected with support plate 2 41. The upper surface of support plate 2 41 is fixedly connected with stirring motor 2 42 that is evenly distributed. The stirring shaft of stirring motor 2 42 is respectively located between two adjacent vertical rows of ozone pipes 43. An exhaust port is provided at the upper end of the second support plate 41, and the input end of the second stirring motor 42 is electrically connected to the output end of the control switch group 5. The ozone purification mechanism 4 also includes a return channel 45. The upper end of the fixing base 36 is provided with a return channel 45. The return channel 45 is located at the rear end of the filter box 37. The clear wastewater then enters the purification chamber 44 through the return channel 45. The return channel 45 and the second support plate 41 form a closed space in the purification chamber 44. Ozone can only be discharged from the exhaust port of the second support plate 41. The ozone generator feeds ozone, and the second stirring motor 42 stirs the wastewater so that the wastewater and ozone are fully mixed, thereby achieving multiple functions such as removing pollutants in the water, decolorizing the water, removing metal ions such as iron and manganese in the water, and removing odors and bad smells.

[0026] The sedimentation mechanism 3 includes a heavy metal capture agent pipeline 31, a flocculant pipeline 32, a support plate 33, a stirring motor 34, a partition 35 and a fixed seat 36. The upper side of the front end of the purification tank 2 is fixedly connected with the heavy metal capture agent pipeline 31 and the flocculant pipeline 32 respectively. A partition 35 is provided in the middle of the purification tank 2. The upper end of the purification tank 2 is fixedly connected with a support plate 33. The upper end of the support plate 33 is fixedly connected with a stirring motor 34 symmetrically distributed front and back. The stirring motors 34 are all located at the front end of the partition 35. The rear end of the purification tank 2 is provided with a fixed seat 36. The purification chamber 44 is located at the rear end of the fixed seat 36. The input end of the stirring motor 34 is electrically connected to the control switch group 5. At the output end, the sedimentation mechanism 3 also includes a filter box 37. The interior of the fixing seat 36 is fixedly connected to the filter box 37. The interior of the filter box 37 is provided with evenly distributed inclined through holes. The heavy metal industrial wastewater with small metal debris removed enters the interior of the purification tank 2. The heavy metal capture agent pipe 31 feeds the heavy metal capture agent, and the flocculant pipe 32 feeds the flocculant. The stirring motor 34 stirs the wastewater to accelerate the fusion of the three. The residual heavy metals and debris form flocs. The wastewater with flocs passes through the partition 35, and the flocs are precipitated between the partition 35 and the fixing seat 36. The clear wastewater passes through the inclined through holes of the filter box 37 to further filter out the small flocs that have not settled in the wastewater.

[0027] The system further comprises a control switch group 5 , which is arranged at the front side of the purification tank 2 , and an input end of the control switch group 5 is electrically connected to an external power supply.

[0028] The working principle of the multi-stage purification treatment device for heavy metal industrial wastewater provided by the utility model is as follows: heavy metal industrial wastewater is passed into the interior of the pretreatment tank 1, and the magnetic rod 7 magnetically absorbs the fine metal debris in the heavy metal industrial wastewater. After long-term use, the magnetic rod 7 is pulled out, the fine metal debris is peeled off, the L-shaped sealing plate 8 is removed, the interior of the pretreatment tank 1 is rinsed, and the heavy metal industrial wastewater with the fine metal debris removed enters the interior of the purification tank 2. The heavy metal capture agent is fed into the heavy metal capture agent pipeline 31, and the flocculant is fed into the flocculant pipeline 32. The stirring motor 34 stirs the wastewater to accelerate the fusion of the three, and the residual Heavy metals and debris form flocs, and the wastewater with flocs passes through the partition 35, and the flocs are settled between the partition 35 and the fixed seat 36. The clear wastewater passes through the inclined through-holes of the filter box 37 to further filter out the unsettled small flocs inside the wastewater. The clear wastewater then passes through the return channel 45 and enters the purification chamber 44. The return channel 45 and the support plate 2 41 form a closed space in the purification chamber 44. Ozone can only be discharged from the exhaust port of the support plate 2 41. The ozone generator sends in ozone, and the stirring motor 2 42 stirs the wastewater to fully mix the wastewater and ozone, thereby achieving multiple functions such as water decolorization and odor removal.

[0029] It is worth noting that the stirring motor 1 34 and the stirring motor 2 42 disclosed in the above embodiments can both be BLD09 stirring motors, and the control switch group controls the operation of the induced draft fan 2 and the motor 31 using methods commonly used in the prior art. The control switch group 5 is provided with switch buttons corresponding to the stirring motor 1 34, the stirring motor 2 42 and the ozone generator for controlling their switching operations.

[0030] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Heavy metal industrial wastewater multi-stage purification treatment device, characterized by: It includes a pretreatment tank (1) and a purification tank (2); Pretreatment tank (1): The upper end of the pretreatment tank is fixedly connected to a support plate three (6), and the upper end of the support plate three (6) is plugged with evenly distributed magnetic rods (7); The purification tank (2) is arranged at the rear end of the pretreatment tank (1). A precipitation mechanism (3) and an ozone purification mechanism (4) are sequentially arranged inside the purification tank (2) from front to back. The ozone purification mechanism (4) includes an ozone pipe (43) and a purification chamber (44). The rear end of the purification tank (2) is provided with a purification chamber (44). The interior of the purification chamber (44) is provided with evenly distributed ozone pipes (43). The air inlet of the ozone pipe (43) is connected to the air outlet of the ozone generator.

2. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 1, characterized in that: It also includes a control switch group (5), which is arranged on the front side of the purification tank (2), and the input end of the control switch group (5) is electrically connected to an external power supply.

3. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 2, characterized in that: The precipitation mechanism (3) comprises a heavy metal capture agent pipeline (31), a flocculant pipeline (32), a support plate (33), a stirring motor (34), a partition (35) and a fixed seat (36); the upper side of the front end of the purification tank (2) is fixedly connected to the heavy metal capture agent pipeline (31) and the flocculant pipeline (32), respectively; a partition (35) is provided in the middle of the purification tank (2); the upper end of the purification tank (2) is fixedly connected to the support plate (33); the upper end of the support plate (33) is fixedly connected to the stirring motor (34) symmetrically distributed front and back; the stirring motor (34) is located at the front end of the partition (35); the rear end of the purification tank (2) is provided with a fixed seat (36); the purification chamber (44) is located at the rear end of the fixed seat (36); the input end of the stirring motor (34) is electrically connected to the output end of the control switch group (5).

4. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 3 is characterized in that: The precipitation mechanism (3) further comprises a filter box (37), the interior of the fixing seat (36) is fixedly connected with the filter box (37), and the interior of the filter box (37) is provided with evenly distributed inclined through holes.

5. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 2, characterized in that: The ozone purification mechanism (4) further comprises a second support plate (41) and a second stirring motor (42). The upper end of the purification chamber (44) is fixedly connected to the second support plate (41). The upper surface of the second support plate (41) is fixedly connected to the second stirring motor (42) which is evenly distributed. The stirring shafts of the second stirring motor (42) are respectively located between two adjacent vertical rows of ozone pipes (43). An exhaust port is provided at the upper end of the second support plate (41). The input end of the second stirring motor (42) is electrically connected to the output end of the control switch group (5).

6. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 4, characterized in that: The ozone purification mechanism (4) further comprises a return channel (45). The upper end of the fixing seat (36) is provided with the return channel (45), and the return channel (45) is located at the rear end of the filter box (37).

7. The multi-stage purification treatment device for heavy metal industrial wastewater according to claim 1, characterized in that: An L-shaped sealing plate (8) is fixedly connected to the lower side of the front end of the pretreatment tank (1).

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