CN116375271A - A lithium battery waste liquid treatment mechanism - Google Patents

Abstract

The invention discloses a treatment mechanism for lithium battery waste liquid, which comprises a treatment tank in a closed structure. A central processing system is arranged on the top side wall of the treatment tank; The height direction of the treatment tank is set at intervals, and multiple sealed partitions are used to divide the treatment tank into multiple reaction areas. The multiple reaction areas are waste liquid collection area, reaction precipitation area, microbial degradation area and bottom filtration from top to bottom. Excretion area; the waste liquid collection area is used to store lithium battery waste liquid, and the reaction precipitation area is used for acid-base balance of lithium battery waste liquid, precipitation of heavy metal ions in lithium battery waste liquid and treatment of lithium battery waste liquid In the microbial degradation area, the organic matter in the lithium battery waste liquid is biodegraded by microorganisms, eliminating the organic matter in the lithium battery waste liquid, simplifying the treatment process of the lithium battery waste liquid, and ensuring that the lithium battery waste liquid after treatment reaches National Wastewater Discharge Standards.

Description

A lithium battery waste liquid treatment mechanism

technical field

The invention belongs to the technical field of battery waste liquid treatment, and in particular relates to a lithium battery waste liquid treatment mechanism.

Background technique

Lithium batteries are becoming more and more popular in our daily life. As an important part of today's new energy vehicles, the demand for lithium batteries in the automotive market has soared, leading to the emergence of many battery super factories. Lithium batteries are a relatively clean new energy , but the production wastewater generated during the production of lithium batteries is a typical high-concentration organic wastewater. Wastewater mainly contains N-methylpyrrolidone, carbon powder, organic lipids and heavy metal ions. Although the amount of water is relatively small, the wastewater has complex components, poor biodegradability, non-biodegradable, and certain toxicity. If the lithium battery production wastewater that has not been thoroughly treated is directly discharged into the water environment, it will greatly affect the water ecological environment and threaten human health.

In the prior art, a treatment pool is usually provided for the treatment of lithium battery waste liquid, such as the invention patent CN112687972A in the prior art-a cobalt treatment and recovery system and method in lithium battery waste liquid, which is used for Treatment of battery waste liquid, but the electrolytic cell and air flotation pool occupy a large area, and the electrolytic cell and air flotation pool will generate waste gas during the process of processing lithium battery waste liquid, and the waste gas will enter the atmosphere and cause environmental pollution. The floating pool is built by concrete, which has disadvantages such as inability to move and carry, inflexible use and long construction period.

Contents of the invention

The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a lithium battery waste liquid treatment mechanism, which solves the problem of inflexible use and discharge of waste gas into the atmosphere in the existing treatment of lithium battery waste liquid through a treatment pool. Technical problems that cause secondary environmental pollution.

For achieving the above object, the technical scheme that the present invention takes is:

The invention provides a lithium battery waste liquid treatment mechanism, which includes a treatment tank in a closed structure, and a central processing system is arranged on the top side wall of the treatment tank;

There are multiple sealing partitions arranged in the treatment tank, and the multiple sealing partitions are arranged at intervals along the height direction of the processing tank. The multiple sealing partitions are used to divide the processing tank into multiple reaction areas, and the multiple reaction areas are formed by From the bottom to the bottom are the waste liquid collection area, the reaction precipitation area, the microbial degradation area and the bottom filter discharge area;

The waste liquid collection area and the top of the treatment tank form a sealed area, and the top of the treatment tank is provided with an aeration device, a waste liquid hopper device and an exhaust gas exhaust device;

The waste liquid collection area communicates with the reaction precipitation area through a pipeline with a first solenoid valve;

The side wall of the treatment tank where the reaction precipitation area is located is provided with a flocculant adding device and a sediment unloading device;

The reaction precipitation area communicates with the microbial degradation area through a pipeline with a second electromagnetic valve; a filter screen is provided at the nozzle of the pipeline with the second electromagnetic valve; an inspection window is provided on the side wall of the reaction precipitation area;

A photosynthetic bacteria delivery device is provided on the side wall of the treatment tank where the microbial degradation area is located;

The microbial degradation area communicates with the bottom filter discharge area through a pipeline with a third solenoid valve, and a water outlet is provided at the bottom of the bottom filter discharge area, and the water outlet communicates with an external filter device through a pipeline;

The aeration device, waste liquid hopper device, first solenoid valve, sediment discharge device, second solenoid valve, photosynthetic bacteria feeding device and third solenoid valve are all electrically connected to the central processing system.

Further, the central processing system is a PLC controller.

Further, the aeration device includes an air pump fixedly connected to the top of the treatment tank, the air pump is connected with an inflation tube, and the bottom end of the inflation tube passes through the top of the treatment tank and is located at the waste liquid collection At the bottom of the area, the free end of the inflatable tube is connected with an aeration head with multiple air outlets;

The waste liquid hopper device includes a liquid inlet hopper with an upper, lower, and lower bucket-shaped structure. The bottom of the liquid inlet hopper passes through the top of the treatment tank and communicates with the waste liquid collection area. A fourth solenoid valve that is switched on and off and electrically connected to the central processing system;

The waste gas exhaust device includes an exhaust pipe arranged on the top of the treatment tank and communicated with the waste liquid collection area. The exhaust pipe is connected with an exhaust gas filter module, and the exhaust gas filter module includes an exhaust gas box communicated with the waste gas pipe. There are multiple active carbon plates detachably connected in the exhaust gas box.

Further, the exhaust gas box is provided with a plurality of gaps for the activated carbon plate to pass through, and an activated carbon plate is arranged in each of the gaps, and the shape of each activated carbon plate is the same as the cross section of the exhaust gas box. matching; a sealing rubber ring is arranged on the side walls around each notch.

Further, a sampling pipe is provided on the side wall of the processing tank where the reaction precipitation area is located, and a sixth electromagnetic valve electrically connected to the central processing system is provided on the sampling pipe, and a valve connected to the central processing system is provided at the end of the sampling pipe. An electric pH meter and a wastewater component detection device electrically connected to the central processing system;

The flocculant adding device includes a mounting frame fixedly connected to the outer wall of the treatment tank, and the mounting frame is provided with an acid liquid adding box, an alkali liquid adding box and a flocculant adding box, and the acid liquid adding box is filled with acid liquid, alkali The liquid addition box is filled with lye, and the flocculant addition box is filled with heavy metal scavenger;

Each addition box is provided with a water pump electrically connected to the central controller, and the water pump is used to pump the liquid in each addition box into the reaction precipitation area.

Further, a sediment discharge port is provided on the side wall of the reaction precipitation area, and the sediment discharge port is connected with a filter press module through a pipeline; the lower side of the sediment discharge port is sealed with the bottom of the reaction precipitation area. The upper surface of the partition is flush;

A first installation groove is arranged in the sealing partition at the bottom of the reaction precipitation area, and one side of the first installation groove runs through the treatment tank;

The sediment unloading device includes a scraper piece located on the upper surface of the sealed partition at the bottom of the reaction precipitation area. The lower end surface of one end of the scraper piece is provided with a rotating shaft, and one end of the rotating shaft is fixedly connected to the lower end surface of the scraper piece. One end passes through the bottom sealing partition of the reaction precipitation area and is located in the first installation groove, and a sealing ring is arranged between the rotating shaft and the bottom sealing partition of the reaction precipitation area;

The end of the rotating shaft located in the first installation groove is provided with a first umbrella-shaped driven gear; the outer wall of the processing tank is provided with a first motor electrically connected to the central controller, and the first motor A first transmission rod located in the first installation groove is horizontally arranged on the output end, and a first umbrella-shaped driving gear meshed with the first umbrella-shaped driven gear is arranged on the first transmission rod.

Further, the treatment tank is a hollow cylindrical structure, the scraper member includes a first scraper rod, the first scraper rod is a hollow columnar structure, and the cross section of the first scraper rod has an open bottom. "door" structure;

The inside of the first scraper rod is provided with a second scraper rod, and the second scraper rod is slidably connected with the inner wall of the first scraper member through the cooperation of the limiting groove and the limiting block, and the limiting groove and the The length direction of the limit block is in the same direction as the length direction of the first scraper member, a thrust spring is arranged between the tail end of the second scraper rod and the first scraper rod, and the free end of the second scraper rod is rolled There are balls;

The lower end faces of the first scraper rod and the second scraper rod are in contact with the upper end face of the sealing partition at the bottom of the reaction precipitation area;

The rotating shaft is fixedly connected with one end of the first scraper rod, and the rotating shaft is located at the edge of the sealing partition at the bottom of the reaction precipitation area.

Further, the vertical projection of the sediment discharge port is in a circular arc structure, the diameter of the arc corresponding to the sediment discharge port is the same as the diameter of the sealing partition, and one side of the sediment discharge port is connected to the first scraper. The position of one end of the plate rod is connected;

Both side walls of the first scraper rod are provided with a push block in a circular arc structure, the arc length on the outside of the push block is greater than the arc length of the sediment discharge port, and the arc line corresponding to the outside of the push block The diameter is the same as that of the sealing partition.

Further, the filter press module includes a filter box arranged outside the treatment tank, the filter box is located below the sediment discharge port, a filter plate is detachably connected to the filter box, and the top of the filter box is set There is a pipeline communicating with the sediment discharge port, and the fifth solenoid valve electrically connected to the central processing system is arranged at the sediment discharge port; the fifth solenoid valve is in a normally closed state; the bottom of the filter box is provided with a The drain pipe connected to the microbial degradation area; the filter box is fixedly connected to the side of the treatment tank through a support frame.

Further, the photosynthetic bacteria delivery device includes a photosynthetic bacteria liquid addition box communicated with the microbial degradation area;

A plurality of light source lamp posts are vertically arranged in the microbial degradation area, and the plurality of light source lamp posts are evenly arranged around the axis of the treatment tank in a circumferential direction, and the two ends of each light source lamp post are respectively connected to the top and bottom of the microbial degradation area The sealing partition of the sealing connection;

The microbial degradation area is also equipped with lamp post wall scraping device;

A second installation groove is arranged in the sealing partition at the bottom of the microbial degradation area, and one side of the second installation groove horizontally runs through the sealing partition at the bottom of the microbial degradation area; The connected second motor, the output end of the second motor is provided with a second transmission rod located in the second installation groove, and the second transmission rod is provided with a second umbrella-shaped driving gear;

The lamp post wall scraping device includes a threaded rod arranged at the center of the microbial degradation area. A support plate is threaded on the threaded rod. The support plate is provided with the same number of mounting holes as the number of multiple light source lamp posts. Each of the mounting holes is provided with a ring scraper, and each of the ring scrapers is in contact with the peripheral outer wall of the light source lamp post;

The top of the threaded rod is rotatably connected to the sealing partition at the top of the microbial degradation area, and the bottom end of the threaded rod passes through the sealing partition at the bottom of the microbial degradation area and is located in the second installation groove. The second bevel driven gear meshed with the second bevel drive gear.

The beneficial effects of the present invention are as follows: 1. The present invention divides the treatment tank into a plurality of reaction areas through a plurality of sealing partitions, specifically, the waste liquid collection area is used to store lithium battery waste liquid, and the reaction precipitation area is used to treat lithium battery The acid-base balance of the waste liquid, the precipitation of heavy metal ions in the lithium battery waste liquid and the precipitation of the incompatible substances in the lithium battery waste liquid, the microbial degradation area uses microorganisms to biodegrade the organic matter in the lithium battery waste liquid to eliminate The organic matter in the lithium battery waste liquid makes the lithium battery waste liquid meet the discharge standard; the lithium battery waste liquid treatment mechanism in the present invention integrates the functions of storage, acid-base balance, precipitation of heavy metal ions and incompatible substances, and degradation of organic matter. Moreover, during the process of treating the lithium battery waste liquid, the harmful gas generated is captured by the activated carbon plate in the exhaust gas exhaust device, so that the harmful gas will not be released and secondary pollution will not occur.

2. The present invention integrates the waste liquid collection area, the reaction precipitation area, the microbial degradation area and the bottom filtration and discharge area in the treatment tank, so that the handling of the entire lithium battery waste liquid treatment mechanism is more convenient and quick, compared with the process of passing through the treatment tank In this aspect, the lithium battery waste liquid treatment mechanism can be directly installed in the production workshop, which reduces the transfer of lithium battery waste liquid, is flexible in use, and is more suitable for lithium battery production workshops.

3. The present invention pumps the photosynthetic bacteria solution into the microbial degradation area through the photosynthetic bacteria delivery device, and the light source lamp post provides light source for the photosynthetic bacteria, and the photosynthetic bacteria perform oxygen-free photosynthesis under the action of the light source lamp post, and the lithium battery waste liquid The organic matter, sulfide, ammonia, etc. in the battery are degraded by microorganisms to achieve the purpose of lithium battery waste liquid treatment.

4. The present invention is provided with a sediment unloading device in the reaction precipitation area to realize the scraping of the heavy metal ion flocculent precipitate and water-insoluble impurities deposited in the reaction precipitation area to the sediment discharge port, and the filter press module is used It is used for secondary filtration of heavy metal ion flocculent precipitates and water-insoluble impurities. After filtration, a filter residue cake is formed on the filter plate to facilitate solidification of harmful substances, and the filtered lithium battery waste continues to enter the microbial degradation through the drain pipe. In the area, the microbial degradation reaction is carried out.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a lithium battery waste liquid treatment mechanism in the present invention.

Figure 2 is a schematic diagram of the enlarged structure of the aeration device.

Fig. 3 is an enlarged structural schematic diagram of the waste liquid hopper device.

Fig. 4 is an enlarged structural schematic diagram of the exhaust gas exhaust device.

Fig. 5 is a top view structural diagram of the flocculant adding device installed on the treatment tank.

Fig. 6 is a schematic diagram of the installation structure of the sediment unloading device.

Fig. 7 is a schematic diagram of the installation structure of the filter press module.

Fig. 8 is a schematic diagram of the installation structure of the lamppost wall scraping device.

Fig. 9 is a top view structural diagram of a scraper member disposed in the reaction precipitation area.

Fig. 10 is a schematic diagram of the internal sectional structure of the scraper member.

FIG. 11 is a schematic top view of the support plate.

Wherein, the reference signs are: 1. treatment tank; 2. central processing system; 3. sealing partition; 4. waste liquid collection area; 5. reaction precipitation area; 6. microbial degradation area; 7. bottom filter discharge area; 8. Aeration device; 81. Inflatable pump; 82. Inflatable pipe; 83. Aeration head; 9. Waste liquid hopper device; 91. Liquid inlet hopper; 92. Fourth solenoid valve; 10. Exhaust gas exhaust device; 101 , exhaust pipe; 102, exhaust gas box; 103, activated carbon plate; 104, gap; 105, sealing rubber ring; 11, first solenoid valve; 12, flocculant adding device; 121, installation frame; 122, acid solution adding Box; 123, lye adding box; 124, flocculant adding box; 13, sediment unloading device; 131, scraper piece; 1311, first scraper bar; 1312, second scraper bar; 1313, thrust spring ; 1314, ball; 1315, push block; 132, rotating shaft; 133, the first umbrella driven gear; 134, the first motor; 135, the first transmission rod; 136, the first umbrella driving gear; Two electromagnetic valves; 15, filter screen; 16, maintenance window; 17, photosynthetic bacteria feeding device; 171, photosynthetic bacteria liquid addition box; 18, the third electromagnetic valve; 19, water outlet; Sampling pipe; 22, sixth solenoid valve; 23, electric pH meter; 24, wastewater component detection device; 25, sediment discharge port; 26, filter press module; 261, filter box; 262, filter plate; 263, fifth Solenoid valve; 264, drain pipe; 265, support frame; 27, first installation groove; 28, light source lamp post; 29, lamp post wall scraping device; 291, second motor; 292, second transmission rod; 293, the first Two umbrella-shaped driving gears; 294, threaded rod; 295, support plate; 296, mounting hole; 297, ring scraper; 298, the second umbrella-shaped driven gear; 30, the second installation groove.

Detailed ways

The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

As shown in Figures 1 to 11, the present invention provides a lithium battery waste liquid treatment mechanism, which includes a treatment tank 1 in a closed structure, and a central processing system 2 is arranged on the top side wall of the treatment tank 1; preferably but not limited , the central processing system 2 is a PLC controller.

Multiple sealing partitions 3 are arranged in the processing tank 1, and the multiple sealing partitions 3 are arranged at intervals along the height direction of the processing tank 1. The multiple sealing partitions 3 are used to divide the processing tank 1 into multiple reaction areas. From top to bottom, the reaction area is the waste liquid collection area 4 , the reaction precipitation area 5 , the microbial degradation area 6 and the bottom filter discharge area 7 .

The waste liquid collection area 4 and the top of the treatment tank 1 form a sealed area, and the top of the treatment tank 1 is provided with an aeration device 8, a waste liquid hopper device 9 and an exhaust gas exhaust device 10; specifically, the waste liquid collection area 4 is used to store lithium battery waste liquid, and oxygenate the lithium battery waste liquid in the waste liquid collection area 4 through the aeration device 8 .

In this embodiment, as shown in Figures 1 and 2, the aeration device 8 includes an air pump 81 fixedly connected to the top of the treatment tank 1, the air pump 81 is connected with an inflation tube 82, and the bottom end of the inflation tube 82 passes through The top of the treatment tank 1 is located at the bottom of the waste liquid collection area 4, and the free end of the inflation pipe 82 is connected with an aeration head 83 with a plurality of air outlets, and the air pump 81 is started by the central processing system 2, and the air pump 81 passes through The inflatable tube 82 and the aeration head 83 oxygenate the lithium battery waste liquid, increase the oxygen content of the lithium battery waste liquid, and prepare for the subsequent microbial degradation treatment. At the same time, oxygenate the lithium battery waste liquid to make the lithium battery waste liquid The water-insoluble impurities in the water are not easy to precipitate and block the pipeline with the first electromagnetic valve 11; and by charging the waste liquid collection area 4 with oxygen, the harmful gas in the waste liquid collection area 4 can be released to the exhaust gas exhaust device 10 , The exhaust gas exhaust device 10 is used to collect the leaked harmful gas, so as to prevent the harmful gas from entering the atmosphere and causing secondary pollution.

Specifically, as shown in FIG. 4 , the waste gas exhaust device 10 includes an exhaust pipe 101 arranged on the top of the treatment tank 1 and communicating with the waste liquid collection area 4. The exhaust pipe 101 is communicated with a waste gas filter module, and the waste gas filter module includes The exhaust gas box 102 connected with the exhaust gas pipe has a plurality of activated carbon plates 103 detachably connected in the exhaust gas box 102; the activated carbon plates 103 are used to collect the leaked harmful gas.

Specifically, the exhaust gas box 102 is provided with a plurality of gaps 104 through which the activated carbon plates 103 pass, and each gap 104 is provided with an activated carbon plate 103, and the shape of each activated carbon plate 103 is consistent with the cross-section of the exhaust gas box 102. match; when the activated carbon plate 103 reaches the service life, a new activated carbon plate 103 can be replaced and assembled through the gap 104; a ring of sealing rubber ring 105 is arranged on the side wall around each gap 104, and the sealing rubber ring 105 is used to block the activated carbon The gap between the top of the plate 103 and the notch 104 prevents harmful gas from entering the atmosphere through the gap and causing secondary pollution.

As shown in FIG. 3 , the arrangement of the waste liquid hopper device 9 facilitates the lithium battery waste liquid to enter the waste liquid collection area 4 through the waste liquid hopper device 9 . Specifically, the waste liquid hopper device 9 includes a liquid inlet hopper 91 in the shape of an upper, lower, and lower bucket. The bottom of the liquid inlet hopper 91 passes through the top of the treatment tank 1 and communicates with the waste liquid collection area 4. The bottom of the liquid inlet hopper 91 is set There is a fourth electromagnetic valve 92 for controlling the on-off of liquid inlet and electrically connected with the central processing system 2 .

The waste liquid collection area 4 communicates with the reaction precipitation area 5 through a pipeline with a first solenoid valve 11;

A flocculant addition device 12 and a sediment discharge device 13 are provided on the side wall of the treatment tank 1 where the reaction precipitation area 5 is located;

The reaction precipitation area 5 communicates with the microbial degradation area 6 through a pipeline with a second electromagnetic valve 14; a filter screen 15 is provided at the nozzle of the pipeline with the second electromagnetic valve 14; an inspection window is provided on the side wall of the reaction precipitation area 5 16. The setting of the inspection window 16 is convenient for the arm of the maintenance personnel to enter, and when the filter screen 15 is blocked, it is convenient to take out the filter screen 15 for manual cleaning.

The side wall of the treatment tank 1 where the microbial degradation area 6 is located is provided with a photosynthetic bacteria delivery device 17;

The microbial degradation area 6 communicates with the bottom filter drainage area 7 through a pipeline with a third electromagnetic valve 18, and the bottom of the bottom filter drainage area 7 is provided with a water outlet 19, and the water outlet 19 communicates with an external filter device 20 through a pipeline;

The aeration device 8, the waste liquid hopper device 9, the first solenoid valve 11, the sediment discharge device 13, the second solenoid valve 14, the photosynthetic bacteria feeding device 17 and the third solenoid valve 18 are all electrically connected to the central processing system 2 .

Specifically, the working process of the lithium battery waste liquid treatment mechanism in the present invention is as follows: the lithium battery waste liquid on the production line can be directly connected to the liquid inlet bucket 91 through a pipeline, and when it is necessary to process the lithium battery waste liquid in the waste liquid collection area 4 At this time, it is necessary to close the fourth electromagnetic valve 92 through the central processing system 2, and the lithium battery waste liquid is temporarily stored in the liquid inlet hopper 91 to avoid the subsequent entry of lithium battery waste liquid. When the lithium battery waste liquid in the waste liquid collection area 4 is processed After the liquid reaches the preset processing time, the first electromagnetic valve 11 is opened through the central processing system 2, and the lithium battery waste liquid in the waste liquid collection area 4 is discharged into the reaction precipitation area 5, and then the first electromagnetic valve 11 is closed, and the second electromagnetic valve is opened. Four electromagnetic valves 92 continue to discharge the lithium battery waste liquid in the liquid inlet hopper 91 into the waste liquid collection area 4 to realize continuous treatment in the waste liquid collection area 4 .

As shown in Figures 1 and 5, the flocculant adding device 12 is used to pump acid or alkaline solution into the reaction precipitation area 5 to adjust the acidity and alkalinity of the lithium battery waste liquid in the reaction precipitation area 5, so that the reaction precipitation The pH value of the lithium battery waste liquid in area 5 is 6-7, which is suitable for the subsequent microbial degradation treatment; the heavy metal scavenger is pumped into the reaction precipitation area 5 through the flocculant adding device 12, and the heavy metal scavenger and the lithium battery waste liquid Heavy metal ions combine to form flocculent precipitates. The reaction time of the heavy metal scavenger is 2 to 3 minutes. Then the central control system opens the second solenoid valve 14 to flow the lithium battery waste liquid in the reaction precipitation area 5 into the microbial degradation area 6. Due to The setting of filter screen 15 makes the heavy metal ion floc precipitate and water-insoluble impurity precipitate on the upper end surface of the sealing partition 3 at the bottom of the reaction precipitation area 5, then start the sediment unloading device 13, the floc precipitate and The water-insoluble impurities are scraped off to the sediment discharge port 25, and the filter press module 26 is used for secondary filtration of the heavy metal ion flocculent sediment and water-insoluble impurities. After filtering, a filter residue cake is formed on the filter plate 262 to facilitate Harmful substances are solidified, and the filtered lithium battery waste liquid continues to enter the microbial degradation area 6 through the drain pipe 264 to undergo microbial degradation reactions.

Specifically, as shown in FIG. 7 , the filter press module 26 includes a filter box 261 arranged outside the treatment tank 1, the filter box 261 is located below the sediment discharge port 25, and a filter plate 262 is detachably connected to the filter box 261. The top of the filter box 261 is provided with a pipeline communicating with the sediment discharge port 25, and the sediment discharge port 25 is provided with a fifth solenoid valve 263 electrically connected to the central processing system 2; the fifth solenoid valve 263 is in a normally closed state; The bottom of the filter box 261 is provided with a drain pipe 264 communicating with the microbial degradation area 6 ; the filter box 261 is fixedly connected to the side of the treatment tank 1 through a support frame 265 .

The photosynthetic bacteria liquid is pumped into the microbial degradation area 6 through the photosynthetic bacteria feeding device 17, and the organic matter, sulfide, ammonia, etc. The liquid meets the discharge standard.

The lithium battery waste liquid after treatment meets the discharge standard and then enters the bottom filter discharge area 7. The lithium battery waste liquid in the bottom filter discharge area 7 contains microbial flocs, and is discharged to the external filter device through the water outlet 19, which is harmful to the lithium battery. After the microbial flocs in the waste liquid undergo secondary filtration and precipitation, the lithium battery waste liquid after precipitation is discharged.

In this embodiment, a sampling tube 21 is provided on the side wall of the processing tank 1 where the reaction precipitation area 5 is located, and the sampling tube 21 is provided with a sixth solenoid valve 22 electrically connected to the central processing system 2. The end is provided with an electric pH meter 23 and a waste water composition detection device 24 electrically connected to the central processing system 2; the electric pH meter 23 and the waste water composition detection device 24 are used to detect the pH value of the lithium battery waste liquid and the waste water composition, when the pH value and wastewater composition meet the preset value, it indicates that the reaction of the current lithium battery waste liquid in the reaction precipitation area 5 is completed, and the second solenoid valve 14 is opened through the central control system to discharge the reacted lithium battery waste liquid into the Microbial degradation zone 6. Specifically, the wastewater component parameters include but are not limited to parameters such as COD, BOD, turbidity, conductivity, and total organic carbon.

Specifically, as shown in Figure 5, the flocculant addition device 12 includes a mounting frame 121 fixedly connected to the outer wall of the treatment tank 1, and the mounting frame 121 is provided with an acid solution addition box 122, an alkali solution addition box 123 and a flocculant addition box 124 , the acid solution addition box 122 is filled with acid solution, the lye addition box 123 is filled with lye, and the flocculant addition box 124 is filled with heavy metal scavenger; A connected water pump is used to pump the liquid in each addition tank into the reaction precipitation area 5 .

In order to scrape off the sediment on the upper surface of the closed partition at the bottom of the reaction precipitation area 5, a sediment discharge port 25 is provided on the side wall of the reaction precipitation area 5, and the sediment discharge port 25 is connected with a filter press module 26 through a pipeline ; The lower side of the sediment discharge port 25 is flush with the upper end surface of the sealing partition 3 at the bottom of the reaction precipitation area 5 .

As shown in FIG. 6 , a first installation groove 27 is provided in the sealing partition 3 at the bottom of the reaction precipitation area 5 , and one side of the first installation groove 27 runs through the treatment tank 1 .

The sediment discharge device 13 includes a scraper member 131 located on the upper end surface of the sealing partition 3 at the bottom of the reaction precipitation area 5 , and a rotating shaft 132 is provided on the lower end surface of one end of the scraper member 131 , and one end of the rotating shaft 132 is connected to the scraper member 131 The lower end surface is fixedly connected, and the other end passes through the bottom sealing partition 3 of the reaction precipitation area 5 and is located in the first installation groove 27 . A sealing ring is arranged between the rotating shaft 132 and the bottom sealing partition 3 of the reaction precipitation area 5 .

A first bevel-shaped driven gear 133 is provided at the end of the rotating shaft 132 in the first installation groove 27; a first motor 134 electrically connected to the central controller is provided on the outer wall of the processing tank 1, and the first motor 134 A first transmission rod 135 located in the first mounting groove 27 is horizontally disposed on the output end, and a first bevel-shaped driving gear 136 meshing with the first bevel-shaped driven gear 133 is disposed on the first transmission rod 135 .

Further, the upper end surface of the filter screen 15 is flush with the upper end surface of the sealing partition 3 at the bottom of the reaction precipitation area 5, and when the first motor 134 drives the scraper piece 131 to rotate around the rotation axis 132, the lower end of the scraper piece 131 will move the filter screen. The sediment on the 15 and the water-insoluble impurity are scraped off to the sediment discharge port 25 to avoid blocking the filter screen 15.

Specifically, the processing tank 1 is a hollow cylindrical structure. As shown in Figures 9 to 10, the scraper member 131 includes a first scraper rod 1311, the first scraper rod 1311 has a hollow columnar structure, and the cross section of the first scraper rod 1311 is in the shape of a "door" with an opening at the bottom structure.

The inside of the first scraper rod 1311 is provided with a second scraper rod 1312, and the second scraper rod 1312 is slidably connected with the inner wall of the first scraper member 131 through the cooperation of the limiting groove and the limiting block. The length direction of the limit block is in the same direction as the length direction of the first scraper member 131, and a thrust spring 1313 is arranged between the tail end of the second scraper rod 1312 and the first scraper rod 1311, and the second scraper rod 1312 Rolling balls 1314 are provided on the free end.

Both the lower end surfaces of the first scraper rod 1311 and the second scraper rod 1312 are in contact with the upper end surface of the sealing partition 3 at the bottom of the reaction precipitation area 5 . The rotating shaft 132 is fixedly connected to one end of the first scraper rod 1311 , and the rotating shaft 132 is located at the edge of the sealing partition 3 at the bottom of the reaction precipitation area 5 .

Under the thrust of the thrust spring 1313, no matter which position the scraper member 131 is in, the overall length of the scraper member 131 will change correspondingly, always connecting the ball 1314 on the free end of the second scraper rod 1312 with the reaction precipitation area. The side walls of 5 are in close contact, and the sediment and water-insoluble impurities on the sealing partition 3 at the bottom of the reaction precipitation area 5 are scraped off more thoroughly.

Further, the vertical projection of the sediment discharge port 25 is in a circular arc structure, the diameter of the arc corresponding to the sediment discharge port 25 is the same as the diameter of the sealing partition 3, and one side of the sediment discharge port 25 is connected to the first scraper rod. The positions of one end of 1311 are connected; the two sidewalls of the first scraper rod 1311 are provided with a push block 1315 in a circular arc structure, and the arc length of the outside of the push block 1315 is greater than the arc length of the sediment discharge port 25. The arc diameter corresponding to the arc line outside the block 1315 is the same as the diameter of the sealing partition 3 . The cooperation between the push block 1315 and the sediment discharge port 25 prevents the scraper member 131 from having a scraping dead angle.

In the present embodiment, the photosynthetic bacteria delivery device 17 includes a photosynthetic bacteria liquid addition box 171 communicated with the microbial degradation area 6; a plurality of light source lamp posts 28 are vertically arranged in the microbial degradation area 6, and the plurality of light source lamp posts 28 are used for processing The axis of the tank 1 is centered and evenly spaced in the circumferential direction, and the two ends of each light source lamp column 28 are respectively sealed and connected with the sealing partitions 3 at the top and bottom of the microbial degradation area 6 . The light source lamp post 28 provides a light source for photosynthetic bacteria, and the photosynthetic bacteria perform oxygen-free photosynthesis under the action of the light source lamp post 28, and perform microbial degradation on organic matter, sulfide, ammonia, etc. purpose of liquid treatment.

As shown in Figures 8 and 11, the microbial degradation area 6 is also provided with a lamppost wall scraping device 29; a second installation groove 30 is arranged in the sealing partition 3 at the bottom of the microbial degradation area 6, and one side of the second installation groove 30 The sealing partition 3 that runs horizontally through the bottom of the microbial degradation area 6; the outer wall of the treatment tank 1 is provided with a second motor 291 electrically connected to the central processing system 2, and the output end of the second motor 291 is provided with a Inside the second transmission rod 292, the second transmission rod 292 is provided with a second umbrella-shaped driving gear 293;

The lamppost wall scraping device 29 includes a threaded rod 294 arranged in the center of the microbial degradation area 6, a support plate 295 is threadedly connected to the threaded rod 294, and the support plate 295 is provided with installations having the same number as the plurality of light source lampposts 28. Holes 296 , each mounting hole 296 is provided with an annular scraper 297 , and each annular scraper 297 is in contact with the peripheral outer wall of the light source lamp post 28 .

The top of the threaded rod 294 is rotatably connected with the sealing partition 3 at the top of the microbial degradation zone 6, and the bottom end of the threaded rod 294 passes through the sealing partition 3 at the bottom of the microbial degradation zone 6 and is positioned in the second mounting groove 30. The bottom of the threaded rod 294 A second bevel driven gear 298 meshing with the second bevel drive gear 293 is arranged on the end.

The rotation of the second motor 291 is controlled by the central control system, and the second motor 291 drives the threaded rod 294 to rotate through the second transmission rod 292, the second umbrella-shaped driving gear 293 and the second umbrella-shaped driven gear 298, and the rotating threaded rod 294 realizes Convert the rotary motion into the vertical motion of the support plate 295, and then drive the ring scraper 297 on the support plate 295 to clean the attachments on the outer wall of the circumference, improve the light transmittance and irradiation efficiency of the light source lamp post 28, and keep the light The continuous supply of energy improves the efficiency of photosynthetic bacteria microbial degradation treatment; at the same time, the vertically moving support plate 295 can stir the lithium battery waste liquid in the microbial degradation area 6 to achieve uniform mixing of the photosynthetic bacteria liquid, and also It can improve the treatment efficiency of photosynthetic bacteria on lithium battery waste liquid.

In summary, the present invention divides the treatment tank 1 into a plurality of reaction areas through a plurality of sealing partitions 3, specifically, the waste liquid collection area 4 is used to store lithium battery waste liquid, and the reaction precipitation area 5 is used to clean the lithium battery. The acid-base balance of the waste liquid, the precipitation of heavy metal ions in the lithium battery waste liquid and the precipitation of the incompatible substances in the lithium battery waste liquid, the microbial degradation zone 6 biodegrades the organic matter in the lithium battery waste liquid through microorganisms, Eliminate the organic matter in the lithium battery waste liquid, so that the lithium battery waste liquid reaches the discharge standard; the lithium battery waste liquid treatment mechanism in the present invention integrates the functions of storage, acid-base balance, precipitation of heavy metal ions and incompatible substances, and degradation of organic matter , and during the process of treating the lithium battery waste liquid, the harmful gas generated is captured by the activated carbon plate 103 in the exhaust gas exhaust device 10, so that the harmful gas will not be released and secondary pollution will not occur.

Claims (10)

1. The lithium battery waste liquid treatment mechanism is characterized by comprising a treatment tank with a closed structure, wherein a central processing system is arranged on the side wall of the top of the treatment tank;

a plurality of sealing partition plates are arranged in the treatment tank, are arranged at intervals along the height direction of the treatment tank, and are used for dividing the treatment tank into a plurality of reaction areas, wherein the plurality of reaction areas sequentially comprise a waste liquid collecting area, a reaction sedimentation area, a microorganism degradation area and a bottom filtering and draining area from top to bottom;

the waste liquid collecting area and the top of the treatment tank form a sealing area, and the top of the treatment tank is provided with an aeration device, a waste liquid hopper device and a waste gas exhaust device;

the waste liquid collecting area is communicated with the reaction precipitation area through a pipeline with a first electromagnetic valve;

a flocculating agent adding device and a sediment discharging device are arranged on the side wall of the treatment tank where the reaction sedimentation area is located;

the reaction precipitation area is communicated with the microbial degradation area through a pipeline with a second electromagnetic valve; a filter screen is arranged at the pipe orifice of the pipeline with the second electromagnetic valve; an overhaul window is arranged on the side wall of the reaction precipitation area;

a photosynthetic bacteria throwing device is arranged on the side wall of the treatment tank where the microbial degradation area is positioned;

the microbial degradation area is communicated with the bottom filtering and draining area through a pipeline with a third electromagnetic valve, a water outlet is arranged at the bottom of the bottom filtering and draining area, and the water outlet is communicated with an external filtering device through a pipeline;

the aeration device, the waste liquid hopper device, the first electromagnetic valve, the sediment discharging device, the second electromagnetic valve, the photosynthetic bacteria throwing device and the third electromagnetic valve are electrically connected with the central processing system.

2. The lithium battery waste liquid treatment mechanism according to claim 1, wherein the central processing system is a PLC controller.

3. The lithium battery waste liquid treatment mechanism according to claim 1, wherein the aeration device comprises an inflator pump fixedly connected with the top of the treatment tank, an inflation tube is connected to the inflator pump, the bottom end of the inflation tube passes through the top of the treatment tank and is positioned at the bottom in the waste liquid collection area, and the free end of the inflation tube is connected with an aeration head with a plurality of air outlet holes;

the waste liquid hopper device comprises a liquid inlet hopper with a big top and a small bottom, the bottom of the liquid inlet hopper penetrates through the top of the treatment tank to be communicated with the waste liquid collecting area, and a fourth electromagnetic valve for controlling on-off of liquid inlet and electrically connected with the central processing system is arranged at the bottom of the liquid inlet hopper;

the exhaust gas exhaust device comprises an exhaust pipe which is arranged at the top of the treatment tank and communicated with the waste liquid collecting area, an exhaust gas filtering module is communicated on the exhaust pipe, the exhaust gas filtering module comprises an exhaust gas box body communicated with an exhaust gas pipe, and a plurality of activated carbon plates are detachably connected in the exhaust gas box body.

4. The lithium battery waste liquid treatment mechanism according to claim 3, wherein the exhaust gas box body is provided with a plurality of gaps for the active carbon plates to pass through, each gap is internally provided with an active carbon plate, and the shape of each active carbon plate is matched with the cross section of the exhaust gas box body; a circle of sealing rubber ring is arranged on the side wall around each notch.

5. The lithium battery waste liquid treatment mechanism according to claim 1, wherein a sampling tube is arranged on the side wall of the treatment tank where the reaction precipitation area is located, a sixth electromagnetic valve electrically connected with the central processing system is arranged on the sampling tube, and an electric pH meter and a waste water component detection device electrically connected with the central processing system are arranged at the tail end of the sampling tube;

the flocculant adding device comprises a mounting frame fixedly connected with the outer wall of the treatment tank, an acid liquor adding box, an alkali liquor adding box and a flocculant adding box are arranged on the mounting frame, acid liquor is filled in the acid liquor adding box, alkali liquor is filled in the alkali liquor adding box, and a heavy metal capturing agent is filled in the flocculant adding box;

each adding box is internally provided with a water pump electrically connected with the central controller, and the water pump is used for pumping liquid in each adding box into the reaction precipitation area.

6. The lithium battery waste liquid treatment mechanism according to claim 5, wherein a sediment drain is formed on the side wall of the reaction sedimentation area, and the sediment drain is connected with a filter pressing module through a pipeline; the lower side of the sediment drain is flush with the upper end surface of the sealing partition plate at the bottom of the reaction sediment area;

a first mounting groove is formed in the sealing partition plate at the bottom of the reaction precipitation area, and one side of the first mounting groove penetrates through the treatment tank;

the sediment discharging device comprises a scraper plate arranged on the upper end face of the bottom sealing partition plate of the reaction sedimentation area, a rotating shaft is arranged on the lower end face of one end of the scraper plate, one end of the rotating shaft is fixedly connected with the lower end face of the scraper plate, the other end of the rotating shaft penetrates through the bottom sealing partition plate of the reaction sedimentation area and is positioned in the first mounting groove, and a sealing ring is arranged between the rotating shaft and the bottom sealing partition plate of the reaction sedimentation area;

the end part of the rotating shaft positioned in the first mounting groove is provided with a first umbrella-shaped driven gear; the outer wall of the treatment tank is provided with a first motor electrically connected with the central controller, the output end of the first motor is horizontally provided with a first transmission rod positioned in a first mounting groove, and the first transmission rod is provided with a first bevel driving gear meshed with the first bevel driven gear.

7. The lithium battery waste liquid treatment mechanism according to claim 6, wherein the treatment tank is of a hollow cylindrical structure, the scraper member comprises a first scraper rod which is of a hollow columnar structure, and the cross section of the first scraper rod is of a door-shaped structure with an opening at the bottom;

the inside of the first scraper rod is provided with a second scraper rod, the second scraper rod is in sliding connection with the inner wall of the first scraper plate in a mode of matching a limit groove and a limit block, the length directions of the limit groove and the limit block are in the same direction as the length direction of the first scraper plate, a thrust spring is arranged between the tail end of the second scraper rod and the first scraper rod, and a ball is arranged at the free end of the second scraper rod in a rolling manner;

the lower end surfaces of the first scraper rod and the second scraper rod are contacted with the upper end surface of the sealing partition plate at the bottom of the reaction precipitation area;

the rotating shaft is fixedly connected with one end of the first scraper rod and is positioned at the edge of the sealing partition plate at the bottom of the reaction precipitation area.

8. The lithium battery waste liquid treatment mechanism according to claim 7, wherein the vertical projection of the sediment drain opening is in an arc structure, the diameter of an arc corresponding to the sediment drain opening is the same as the diameter of the sealing partition plate, and one side of the sediment drain opening is connected with the position of one end of the first scraper rod;

the two side walls of the first scraper rod are respectively provided with a pushing block with an arc structure, the arc length of the outer side of each pushing block is larger than that of a sediment drain opening, and the diameter of an arc corresponding to the arc line of the outer side of each pushing block is the same as that of the sealing partition plate.

9. The lithium battery waste liquid treatment mechanism according to claim 8, wherein the filter pressing module comprises a filter box arranged outside the treatment tank, the filter box is positioned below the sediment drain, a filter plate is detachably connected in the filter box, a pipeline communicated with the sediment drain is arranged at the top of the filter box, and a fifth electromagnetic valve electrically connected with the central processing system is arranged at the sediment drain; the fifth electromagnetic valve is in a normally closed state; the bottom of the filter box is provided with a drain pipe communicated with the microbial degradation area; the filter box is fixedly connected with the side part of the treatment tank through a support frame.

10. The lithium battery waste liquid treatment mechanism according to claim 1, wherein the photosynthetic bacteria putting device comprises a photosynthetic bacteria liquid adding tank communicated with the microbial degradation area;

a plurality of light source lamp posts are vertically arranged in the microbial degradation area, the light source lamp posts are uniformly arranged at intervals in the circumferential direction by taking the axis of the treatment tank as the center, and two ends of each light source lamp post are respectively and hermetically connected with the sealing partition plates at the top and the bottom of the microbial degradation area;

the microbial degradation area is also provided with a lamp post wall scraping device;

a second mounting groove is formed in the sealing partition plate at the bottom of the microbial degradation area, and one side of the second mounting groove horizontally penetrates through the sealing partition plate at the bottom of the microbial degradation area; a second motor electrically connected with the central processing system is arranged on the outer wall of the processing tank, a second transmission rod positioned in a second mounting groove is arranged at the output end of the second motor, and a second umbrella-shaped driving gear is arranged on the second transmission rod;

the lamp post wall scraping device comprises a threaded rod arranged at the central position of the microbial degradation area, a supporting plate is connected to the threaded rod in a threaded manner, the supporting plate is provided with mounting holes the number of which is the same as that of the plurality of light source lamp posts, circular ring scraping plates are arranged in each mounting hole, and each circular ring scraping plate is contacted with the circumferential outer wall of the light source lamp post;

the top of the threaded rod is rotationally connected with the sealing partition plate at the top of the microbial degradation area, the bottom of the threaded rod penetrates through the sealing partition plate at the bottom of the microbial degradation area and is positioned in the second mounting groove, and a second bevel driven gear meshed with the second bevel driving gear is arranged at the bottom of the threaded rod.

Images