A device for treating chemical industrial wastewater by using activated carbon countercurrent adsorption

Abstract

The present application relates to wastewater treatment device technical field, specifically to a kind of activated carbon countercurrent adsorption treatment chemical wastewater device, including the wastewater pool for containing the chemical wastewater to be treated, further comprising: processing part, including with the processing pool of wastewater pool lead-through connection, overflow plate is installed in the processing pool, located overflow plate one side is equipped with the flocculation tank for installing stirring unit and scraping unit, other side is equipped with the complex screen tank for installing oscillating plate;The overflow pool of built-in adsorption bin and the liquid collection tank are sequentially arranged on the other side of the complex screen tank;Activated carbon can be continuously transferred from the overflow pool to the front-end wastewater pool in the device, so that activated carbon can be adsorbed again in high-concentration impurity concentration atmosphere, which is conducive to reducing the impurity content of initial wastewater, and then reducing the dosage of subsequent flocculant, which can significantly reduce the processing cost.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically to an activated carbon countercurrent adsorption device for treating chemical wastewater. Background Technology

[0002] Chemical wastewater is a type of wastewater mainly composed of organic pollutants. It is highly hazardous, characterized by its high biological toxicity, and contains impurities such as polycyclic aromatic hydrocarbons and benzene compounds.

[0003] According to the environmental protection system and method for treating high-concentration, recalcitrant organic wastewater disclosed in authorization announcement number CN113582449B, ozone and other substances can be directly added to the wastewater for oxidation treatment, but this does not remove suspended solids and solid impurities in the wastewater. Currently, there are various ways to treat chemical wastewater, including membrane separation technology, electrochemical oxidation technology, and advanced oxidation technology, but these technologies are costly, complex to operate and maintain, and have lengthy processes. Conventional treatment methods can adsorb most impurities by adding flocculants and other chemical substances to form flocs. After filtering the wastewater to form flocs, physical adsorbents are used to adsorb and clean the remaining impurities in the wastewater. However, there are also the following problems: when the impurity content in the wastewater containing flocs is reduced to a low concentration after filtration, the physical adsorbent tends to reach an adsorption equilibrium state and stops adsorbing, resulting in a low utilization rate of the adsorbent's adsorption capacity.

[0004] In summary, considering the need to improve the utilization rate of physical adsorbents in the process of chemical wastewater treatment, so as to further enhance the utilization of adsorption capacity and reduce wastewater treatment costs, we propose an activated carbon countercurrent adsorption device for treating chemical wastewater. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section and provide an activated carbon countercurrent adsorption device for treating chemical wastewater.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A device for treating chemical wastewater by activated carbon countercurrent adsorption includes a wastewater tank for holding the chemical wastewater to be treated, and further includes:

[0008] The treatment unit includes a treatment tank that is connected in communication with the wastewater tank. An overflow plate is installed in the treatment tank. A flocculation tank for installing a stirring unit and a scraping unit is provided on one side of the overflow plate, and a double screening tank for installing a vibrating plate is provided on the other side.

[0009] On the other side of the double screening tank, there is an overflow tank with a built-in adsorption chamber and a collection tank in sequence. The overflow tank is used to allow chemical wastewater to flow from the bottom up through the adsorption chamber and overflow into the collection tank.

[0010] The adsorption chamber is filled with activated carbon, and a U-shaped feed pipe for discharging the activated carbon from the adsorption chamber is installed in the wastewater pool.

[0011] Preferably, the flocculation tank is provided with a liquid inlet, and a material injection assembly is installed at the liquid inlet;

[0012] The injection assembly includes a guide pipe and a mixing chamber connected to the pipe body. Above the mixing chamber, a feed hopper for holding flocculant is installed through a vertical pipe. An impeller is rotatably installed inside the mixing chamber, and a vertical auger inserted into the feed hopper is coaxially installed on the impeller.

[0013] One end of the guide pipe is connected to the liquid inlet, and the other end is connected to a liquid pump via a liquid pump. The liquid pump is inserted into the wastewater tank.

[0014] Preferably, the stirring unit includes a rotating shaft on which a filter plate is mounted, and a gear mounted on the top of the rotating shaft;

[0015] The flocculation tank is equipped with a C-shaped top frame, and the stirring unit is rotatably mounted on the C-shaped top frame via the rotating shaft.

[0016] Preferably, the scraping unit includes a scraping shell for attaching to the surface of the filter screen plate, and the scraping shell is provided with a scraping port for collecting flocculent scraping material at the contact surface with the filter screen plate.

[0017] The scraper shell is provided with a cavity for inserting a container tray.

[0018] Preferably, the scraper shell is connected by a connecting rod to a column block for insertion on the rotating shaft, and the column block is rotatably mounted on the mounting plate;

[0019] A cylinder is installed between the C-shaped top frame and the mounting plate, and the cylinder is used to drive the scraping unit to move up and down in the vertical direction.

[0020] Preferably, an inclined plate body biased towards one side of the flocculation tank is provided above the overflow plate, and the inclined plate body is provided with an upward-opening arc-shaped baffle and flow holes.

[0021] Preferably, a first partition with bottom conduction is provided between the screening tank and the overflow tank, and a first side support block and a second side support block are respectively provided on the corresponding sides of the first partition and the overflow plate;

[0022] A vertical rod is installed on the first side support block and the second side support block, and a spring is sleeved on the vertical rod;

[0023] The oscillating plate is inserted into the vertical rod.

[0024] Preferably, the oscillating plate is provided with multiple deposition grooves and multiple frustum-shaped protrusions with diameters gradually decreasing from bottom to top, and the protrusions are provided with through holes.

[0025] Preferably, a second partition is provided between the overflow tank and the collection tank, and a first bottom support block and a second bottom support block are respectively provided at the bottom of the first partition and on the corresponding side of the second partition;

[0026] The adsorption chamber is installed on the first base block and the second base block.

[0027] Preferably, the adsorption chamber is provided with a hopper for holding activated carbon on the side corresponding to the U-shaped feed tube;

[0028] A flexible auger for conveying activated carbon is rotatably installed between the hopper, adsorption hopper, and U-shaped feed pipe.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. This activated carbon countercurrent adsorption treatment device for chemical wastewater can collect flocculants precipitated in the water through its treatment section. At the same time, the device adopts an overflow structure, which allows the water to flow from bottom to top through the adsorption chamber containing activated carbon to further enhance the treatment effect.

[0031] 2. The device can continuously transfer activated carbon from the overflow tank to the upstream wastewater tank, forming a countercurrent transfer action. This allows the activated carbon to re-adsorb in a high-concentration impurity atmosphere, which helps to reduce the impurity content of the initial wastewater, thereby reducing the amount of subsequent flocculant dosage and significantly reducing treatment costs.

[0032] 3. The feeding component in this device can automatically add flocculant simultaneously during the process of introducing wastewater into the treatment tank, so that the water contains uniformly distributed flocculant, which facilitates the effective precipitation of flocs and can work with the stirring unit and scraping unit to quickly collect flocs. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1 This is one of the schematic diagrams of the overall structure of the present invention;

[0035] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0036] Figure 3 This is one of the cross-sectional views of the overall structure of the present invention;

[0037] Figure 4 This is the second cross-sectional view of the overall structure of the present invention;

[0038] Figure 5 This is a cross-sectional view of the treatment tank and overflow plate of the present invention.

[0039] Figure 6 This is an exploded cross-sectional view of the processing unit of the present invention;

[0040] Figure 7 This is an exploded cross-sectional view of the injection assembly of the present invention;

[0041] Figure 8 This is an exploded view of the waste collection component of the present invention;

[0042] Figure 9 This is an exploded cross-sectional view of the oscillating plate of the present invention.

[0043] The meanings of the labels in the diagram are as follows:

[0044] 1. Wastewater tank; 2. Liquid pump; 3. Liquid extraction pipe;

[0045] 4. Injection assembly; 41. Guide pipe; 42. Mixing chamber; 43. Impeller; 44. Vertical pipe; 45. Vertical auger; 46. Material silo;

[0046] 5. Treatment tank; 51. First baffle; 511. First side support block; 512. First bottom support block; 52. Second baffle; 521. Second bottom support block; 53. C-shaped top frame; 501. Flocculation tank; 5011. Liquid inlet; 502. Secondary screening tank; 503. Overflow tank; 5031. Material guide port; 504. Liquid collection tank;

[0047] 6. Stirring unit; 61. Filter plate; 62. Rotating shaft; 63. Gear;

[0048] 7. Scraping unit; 71. Scraper shell; 711. Insertion cavity; 712. Scraper opening; 72. Connecting rod; 73. Column block; 74. Loading tray;

[0049] 8. Overflow plate; 801. Flow hole; 81. Second side support block; 82. Arc-shaped baffle;

[0050] 9. Vibrating plate; 91. Protrusion; 92. Deposition tank;

[0051] 10. Adsorption chamber; 11. Hopper; 12. U-shaped feed tube; 121. Through hole; 122. Discharge port; 13. Soft auger; 14. First drive motor; 15. Second drive motor; 16. Cylinder; 17. Vertical rod; 18. Spring; 19. Mounting plate. Detailed Implementation

[0052] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see Figure 1-9 The present invention will describe the above technical solution in detail through the following embodiments:

[0054] A device for treating chemical wastewater by activated carbon countercurrent adsorption includes a wastewater tank 1 for holding the chemical wastewater to be treated, and further includes:

[0055] The treatment unit includes a treatment tank 5 that is connected to the wastewater tank 1. An overflow plate 8 is installed inside the treatment tank 5 to... Figure 4 and Figure 5 Taking the attached diagram as an example, a flocculation tank 501 for installing a stirring unit 6 and a scraping unit 7 is provided on the left side of the overflow plate 8, and a screening tank 502 for installing a vibrating plate 9 is provided on the right side.

[0056] See Figure 4 and Figure 5 As shown in the structure, the right side of the screening tank 502 is provided with an overflow tank 503 and a collection tank 504 with a built-in adsorption chamber 10. A second partition 52 is provided between the overflow tank 503 and the collection tank 504. A first bottom support block 512 and a second bottom support block 521 are respectively provided on the bottom of the first partition 51 and the corresponding side of the second partition 52. The adsorption chamber 10 is installed on the first bottom support block 512 and the second bottom support block 521, which allows the wastewater in the screening tank 502 to flow into the overflow tank 503. The wastewater flows upward from the bottom of the overflow tank 503 through the adsorption chamber 10 and then overflows into the collection tank 504. The adsorption chamber 10 is filled with activated carbon to enhance the adsorption of impurities.

[0057] Wastewater tank 1 is equipped with a U-shaped feed pipe 12 for discharging activated carbon from adsorption chamber 10. It should be noted that... Figure 1 and Figure 2As shown in the structure, in this embodiment, the adsorption chamber 10 is provided with a hopper 11 for holding activated carbon on the side corresponding to the U-shaped feed pipe 12; a soft auger 13 for conveying activated carbon is rotatably installed between the hopper 11, the overflow tank 503 with a feed inlet 5031, the adsorption chamber 10, and the U-shaped feed pipe 12. In this embodiment, the spiral blades of the soft auger 13 are in contact with the feed inlet 5031 and the corresponding hopper wall of the adsorption chamber 10, reducing seepage to the outside, so that when the soft auger 13 is not rotating, the amount of water overflowing into the collection tank 504 is much greater than the amount seeping into the wastewater tank 1; in this embodiment, the U-shaped feed pipe 12 is provided with a through hole 121 for contacting wastewater. The discharge port 122 for saturated activated carbon is driven by the first drive motor 14 to rotate the soft auger 13, which can sequentially transport the activated carbon in the hopper 11 to the adsorption chamber 10 to adsorb impurities with low concentrations. When the adsorption reaches equilibrium, the treatment effect on the wastewater in the overflow tank 503 decreases. In order to improve the adsorption utilization rate of activated carbon, it can be transported to the U-shaped feed pipe 12 through the soft auger 13. When the impurity concentration in the wastewater tank 1 is high, the activated carbon adsorbs again, reducing the impurity content in the wastewater tank 1. This helps to reduce the amount of flocculant added later and improves the adsorption utilization rate of activated carbon, which helps to reduce the wastewater treatment cost.

[0058] See Figures 1-5 As shown in the diagram, the flocculation tank 501 is equipped with a liquid inlet 5011, and a material injection assembly 4 is installed at the liquid inlet 5011. The material injection assembly 4 includes a guide pipe 41 and a mixing chamber 42 connected to the pipe body. Above the mixing chamber 42, a material hopper 46 for holding flocculant is installed through a vertical pipe 44. An impeller 43 is rotatably installed inside the mixing chamber 42, and a vertical auger 45 inserted into the material hopper 46 is coaxially installed on the impeller 43. One end of the guide pipe 41 is connected to the liquid inlet 5011, and the other end is connected to a suction pipe 3 through a liquid pump 2. The suction pipe 3 is inserted into the wastewater tank 1. The liquid pump 2 can provide pressurized flowing wastewater, which can impact the impeller 43 and drive the vertical auger 45 to rotate. The rotation of the vertical auger 45 can transport the flocculant in the material hopper 46 above into the mixing chamber 42 for mixing and then transport it to the flocculation tank 501, where most of the impurities in the wastewater are flocculated into flocs.

[0059] See Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown, the stirring unit 6 includes a rotating shaft 62 on which a filter screen plate 61 is mounted, and a gear 63 mounted on the top of the rotating shaft 62; a C-shaped top frame 53 is provided above the flocculation tank 501, and the stirring unit 6 is rotatably mounted on the C-shaped top frame 53 via the rotating shaft 62; in this embodiment, two stirring units 6 are used, which can be engaged with two gears 63 by a transmission belt, and a second drive motor 15 is installed on one gear 63 for driving. During the rotation of the filter screen plate 61, the flocculated material will be collected on the plate surface.

[0060] This implementation allows for the cleaning of flocculent particles from the filter screen 61 without removing it. (See attached document.) Figure 6 and Figure 8 As shown in the structure, the scraping unit 7 includes a scraper shell 71 for attaching to the surface of the filter screen plate 61. The scraper shell 71 has a scraper port 712 for collecting the scraped flocculent material at the surface where it is attached to the filter screen plate 61. The scraper shell 71 has a cavity 711 for inserting the receiving tray 74. The scraper shell 71 is connected to a column block 73 for inserting onto the rotating shaft 62 via a connecting rod 72. The column block 73 is rotatably mounted on the mounting plate 19. A cylinder 16 is installed between the C-shaped top frame 53 and the mounting plate 19. The cylinder 16 is used to drive the scraping unit 7 to move vertically. The scraper shell 71 can rotate synchronously with the stirring unit 6 and move via the cylinder 16. Without stopping the machine, it can continuously collect and scrape the surface flocculent material, so that the collected flocculent material is concentrated in the receiving tray 74, which can be cleaned periodically.

[0061] See Figure 4 and Figure 5 The structure shown includes an inclined plate above the overflow plate 8, biased towards the flocculation tank 501. The inclined plate has an upward-opening arc-shaped baffle 82 and flow holes 801, allowing wastewater to overflow upwards into the subsequent secondary screening tank 502. Figure 4 The arc-shaped baffle 82 shown can reduce the flow of impurities such as flocs into the secondary screening tank 502; a first partition 51 with bottom conduction is provided between the secondary screening tank 502 and the overflow tank 503, and a first side support block 511 and a second side support block 81 are respectively provided on the corresponding sides of the first partition 51 and the overflow plate 8; a vertical rod 17 is installed on the first side support block 511 and the second side support block 81, and a spring 18 is sleeved on the vertical rod 17; the vibrating plate 9 is inserted into the vertical rod 17; as shown Figure 9 The structure shown includes a plurality of deposition grooves 92 and a plurality of frustum-shaped protrusions 91 with diameters gradually decreasing from bottom to top, each protrusion 91 having a through hole. It should be noted in this embodiment that, to better realize the oscillation and deposition function of the oscillation plate 9, please refer to... Figure 4 and Figure 5 As shown in the structure, in this embodiment, the oscillating plate 9 is located between the turning point of the inclined plate and the highest point of the second partition plate 52, so that the liquid level in the screening tank 502 is always lower than the oscillating plate 9, and can be oscillated under the impact of the wastewater overflowing from the flocculation tank 501, thereby causing the solid waste to remain in the trough 92.

[0062] This embodiment of the activated carbon countercurrent adsorption treatment device for chemical wastewater uses activated carbon placed in the silo 11. Activated carbon has a large specific surface area, resulting in better adsorption effect and efficiency. To prevent activated carbon loss, a filter screen or mesh is installed at the pore structure where the activated carbon is located, allowing wastewater to flow in but preventing activated carbon loss. Its working principle is as follows: First, wastewater enters the wastewater tank 1 and is transported to the mixing chamber 42 through the pumping pipe 3 and the pump 2. The impeller 43 drives the vertical auger 45 to rotate, subsequently mixing flocculant into the wastewater. The wastewater is discharged into the flocculation tank 501, where flocculants appear. Under the rotation of the stirring unit 6, the flocculants collected on the surface are scraped off by the scraping unit 7. The process involves several steps: first, the activated carbon in the adsorption chamber 10 is used to reduce the content of impurities precipitated in the water; then, the wastewater overflows to the subsequent secondary screening tank 502, where it is further screened by the vibrating plate 9 to retain solid waste. This allows the wastewater containing low-concentration impurities to be adsorbed by the activated carbon inside the adsorption chamber 10. After treatment, the wastewater overflows from bottom to top into the collection tank 504. It is important to note that during this process, the activated carbon in the adsorption chamber 10 can be obtained from the hopper 11 through the soft auger 13 and transported to the U-shaped feed pipe 12 through the soft auger 13. This allows the activated carbon to come into contact with the high-concentration wastewater in the subsequent wastewater tank 1 before treatment, resulting in re-adsorption. This achieves efficient utilization of the activated carbon, reduces the impurity content per unit of wastewater, and helps reduce the amount of flocculant to be added later.

[0063] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0064] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An activated carbon countercurrent adsorption device for treating chemical wastewater, comprising a wastewater tank (1) for holding the chemical wastewater to be treated, characterized in that: Also includes: The treatment unit includes a treatment tank (5) connected in communication with the wastewater tank (1), an overflow plate (8) is installed in the treatment tank (5), a flocculation tank (501) for installing a stirring unit (6) and a scraping unit (7) is provided on one side of the overflow plate (8), and a screening tank (502) for installing a vibrating plate (9) is provided on the other side. On the other side of the double screening tank (502), there is an overflow tank (503) with a built-in adsorption chamber (10) and a collection tank (504). The overflow tank (503) is used to allow chemical wastewater to flow from the bottom up through the adsorption chamber (10) and overflow into the collection tank (504). The stirring unit (6) includes a rotating shaft (62) on which a filter screen plate (61) is installed, and a gear (63) installed at the top of the rotating shaft (62); a C-shaped top frame (53) is provided above the flocculation tank (501), and the stirring unit (6) is rotatably mounted on the C-shaped top frame (53) via the rotating shaft (62); The scraping unit (7) includes a scraping shell (71) for attaching to the surface of the filter screen plate (61). The scraping shell (71) and the filter screen plate (61) are provided with a scraping port (712) for collecting the scraped flocs. The scraping shell (71) is provided with a cavity (711) for inserting a holding tray (74). The scraper shell (71) is connected by a connecting rod (72) to a column block (73) for insertion on the rotating shaft (62), and the column block (73) is rotatably mounted on the mounting plate (19); a cylinder (16) is installed between the C-shaped top frame (53) and the mounting plate (19), and the cylinder (16) is used to drive the scraping unit (7) to rise and fall in the vertical direction; The adsorption chamber (10) is filled with activated carbon. A U-shaped material pipe (12) for discharging the activated carbon in the adsorption chamber (10) is installed in the wastewater tank (1). The adsorption chamber (10) is provided with a material hopper (11) for holding activated carbon on the side corresponding to the U-shaped material pipe (12). A soft auger (13) for conveying activated carbon is rotatably installed between the material hopper (11), the adsorption chamber (10) and the U-shaped material pipe (12).

2. The activated carbon countercurrent adsorption device for treating chemical wastewater as described in claim 1, characterized in that: The flocculation tank (501) is provided with a liquid inlet (5011), and a material injection assembly (4) is installed at the liquid inlet (5011). The injection assembly (4) includes a guide pipe (41) and a mixing chamber (42) connected to the pipe body. Above the mixing chamber (42), a material hopper (46) for holding flocculant is installed through a vertical pipe (44). An impeller (43) is rotatably installed inside the mixing chamber (42). A vertical auger (45) inserted into the material hopper (46) is coaxially installed on the impeller (43). One end of the guide pipe (41) is connected to the liquid inlet (5011), and the other end is connected to the liquid pump (2) via a liquid pump (3). The liquid pump (3) is inserted into the wastewater pool (1).

3. The activated carbon countercurrent adsorption device for treating chemical wastewater as described in claim 1, characterized in that: An inclined plate body biased towards the flocculation tank (501) is provided above the overflow plate (8). The inclined plate body is provided with an arc-shaped baffle (82) with an upward opening and a flow hole (801).

4. The activated carbon countercurrent adsorption device for treating chemical wastewater as described in claim 3, characterized in that: A first partition (51) with bottom conduction is provided between the screening tank (502) and the overflow tank (503). A first side support block (511) and a second side support block (81) are respectively provided on the corresponding sides of the first partition (51) and the overflow plate (8). A vertical rod (17) is installed on the first side support block (511) and the second side support block (81), and a spring (18) is sleeved on the vertical rod (17). The oscillating plate (9) is inserted into the vertical rod (17).

5. The activated carbon countercurrent adsorption device for treating chemical wastewater as described in claim 4, characterized in that: The oscillating plate (9) is provided with multiple deposition grooves (92) and multiple frustum-shaped protrusions (91) with diameters gradually decreasing from bottom to top, and the protrusions (91) are provided with through holes.

6. The activated carbon countercurrent adsorption device for treating chemical wastewater as described in claim 4, characterized in that: A second partition (52) is provided between the overflow tank (503) and the collection tank (504). A first bottom support block (512) and a second bottom support block (521) are respectively provided at the bottom of the first partition (51) and on the corresponding side of the second partition (52). The adsorption chamber (10) is installed on the first base block (512) and the second base block (521).

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