Heavy metal polluted biomass metal washing-out device

Abstract

The utility model relates to the technical field of heavy metal biomass treatment equipment, in particular to a heavy metal polluted biomass metal washing-out device which comprises a tank body and a liquid conveying assembly, a feeding hole is formed in the top of the tank body, and a stirring cavity, a centrifugal cavity and a filtering cavity are sequentially formed in the tank body from top to bottom. The liquid conveying assembly communicates with the stirring cavity, and a stirring mechanism is rotationally arranged in the stirring cavity; a baffle is fixedly arranged between the stirring cavity and the centrifugal cavity, and a two-way piston pump is arranged on the baffle; a centrifugal mechanism is arranged in the centrifugal cavity and comprises a driving assembly and a centrifugal cover, and the driving assembly is connected with the centrifugal cover; a liquid passing plate is fixedly arranged between the centrifugal cavity and the filtering cavity, and a plurality of liquid passing holes are distributed in the liquid passing plate; a filter layer is arranged in the filter cavity; according to the device, heavy metals contained in the heavy metal polluted biomass can be effectively washed out, and serious loss of the biomass can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of heavy metal biomass treatment equipment, specifically to a heavy metal contaminated biomass metal washing device. Background Technology

[0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, mainly due to human factors such as mining, exhaust gas emissions, wastewater irrigation, and the use of products containing excessive levels of heavy metals. Heavy metal-polluted biomass refers to crushed hyperaccumulating plants and crop straw and forest biomass obtained from planting on land contaminated with medium to high concentrations of heavy metals.

[0003] Currently, the treatment of heavy metal-contaminated biomass typically utilizes hydrothermal treatment technology to convert it into reusable products. Due to the high heavy metal content in this biomass, pre-treatment to remove the heavy metals is necessary. However, existing pretreatment devices are cumbersome to operate, have low efficiency, and result in significant losses of biomass during processing and transfer. Summary of the Invention

[0004] This invention addresses the problem of significant biomass loss during the pretreatment of heavy metal-contaminated biomass in existing technologies by providing a heavy metal washing device. This device not only effectively washes out the heavy metals contained in the heavy metal-contaminated biomass but also effectively avoids serious biomass loss, thereby improving the treatment efficiency of heavy metal-contaminated biomass and reducing biomass loss.

[0005] To achieve the above objectives, the technical solution of this utility model is: a heavy metal contaminated biomass metal washing device, comprising a tank and a liquid delivery assembly. The top of the tank has a feed inlet. The interior of the tank, from top to bottom, is arranged with a stirring chamber, a centrifugation chamber, and a filtration chamber. The liquid delivery assembly is connected to the stirring chamber, and a stirring mechanism is rotatably installed inside the stirring chamber. Heavy metal contaminated biomass can be fed into the stirring chamber through the feed inlet, and acid solution is delivered to the stirring chamber through the liquid delivery assembly. The stirring mechanism agitates the heavy metal contaminated biomass and acid solution, ensuring thorough mixing to remove the heavy metals contained in the biomass.

[0006] A baffle is fixedly installed between the stirring chamber and the centrifuge chamber, and a bidirectional piston pump is installed on the baffle. A centrifugation mechanism is installed inside the centrifuge chamber, comprising a drive assembly and a centrifuge shroud, with the drive assembly connected to the centrifuge shroud. The bidirectional piston pump transports the biomass solution from the stirring chamber to the centrifuge chamber, and the centrifugation mechanism separates the acid and biomass, collecting the biomass after heavy metal removal.

[0007] A liquid-passing plate with multiple liquid-passing holes is fixedly installed between the centrifuge chamber and the filtration chamber; a filter layer is provided inside the filtration chamber. The acid solution separated by the centrifugation mechanism can enter the filtration chamber through the liquid-passing holes and pass through the filter layer to filter out heavy metals.

[0008] Furthermore, the infusion assembly includes an acid tank and an acid-resistant pipe. One end of the acid-resistant pipe is connected to the acid tank, and the other end extends into the interior of the stirring chamber and is connected to a spray head. An acid pump is installed on the acid-resistant pipe. The acid tank is used to store the acid to be delivered into the tank, and the acid pump can pump the acid in the acid tank into the stirring chamber through the acid-resistant pipe.

[0009] Furthermore, the stirring mechanism includes a stirring shaft, stirring blades, and a scraping assembly. A motor is installed at the top of the tank. The upper end of the stirring shaft is connected to the output end of the motor, and multiple stirring blades are installed at the lower end. The stirring shaft is driven to rotate by the motor, so that the stirring blades stir and mix the heavy metal contaminated biomass and acid solution in the stirring chamber.

[0010] Furthermore, the scraping assembly is symmetrically arranged on the stirring shaft. The scraping assembly includes a connecting rod and a scraper. The two ends of the connecting rod are fixedly connected to the stirring shaft and the scraper, respectively. The scraper is in contact with the inner wall of the tank. The rotation of the stirring shaft can synchronously drive the scraping assembly to rotate, so that the scraper scrapes off the heavy metal pollutants adhering to the inner wall of the stirring chamber and scrapes them back to the stirring area.

[0011] Furthermore, the centrifuge shroud includes a centrifuge plate, a centrifuge rotor, and centrifuge baffles. The centrifuge rotor is fixedly mounted on the top of the centrifuge plate, and centrifuge baffles are fixedly mounted around the perimeter of the centrifuge plate. One of the centrifuge baffles has a centrifuge discharge hole at its lower part, and a discharge gate is provided at the centrifuge discharge hole. A discharge hole is provided on the tank body at the position corresponding to the centrifuge shroud, and a discharge gate is provided at the discharge hole. The other three centrifuge baffles are provided with multiple filtrate holes. The centrifuge shroud is driven to rotate by a drive assembly to achieve the separation of biomass and acid. The acid can be discharged through the filtrate holes, while the biomass remains in the centrifuge shroud and is collected by the centrifuge shroud.

[0012] Furthermore, a protective cover is fixedly installed on the top of the liquid-passing plate, and the driving component is located inside the protective cover. The driving component is a second motor, the output end of which passes through the protective cover and is connected to the centrifuge plate. The second motor drives the centrifuge plate to rotate, thereby achieving the purpose of rotating the centrifuge shroud. The protective cover protects the second motor.

[0013] Furthermore, the filter layer includes an activated carbon layer and a modified filter layer, with the activated carbon layer located above the modified filter layer. A retaining plate is fixedly installed on the inner wall of the filter chamber, and both the activated carbon layer and the modified filter layer are secured within the retaining plate. An inspection door is provided on the tank corresponding to the position of the filter layer, and a drain pipe connected to the filter chamber is also provided at the bottom of the tank. The activated carbon layer and the modified filter layer can filter and remove heavy metals from the acid solution, and the filtered acid solution can be discharged from the tank through the drain pipe.

[0014] The beneficial effects of this utility model through the above technical solution are as follows:

[0015] This invention has a reasonable structure and good performance. By reacting acid with biomass contaminated with heavy metals, it can effectively wash out the heavy metals contained in the biomass while avoiding serious losses of biomass. It improves the treatment efficiency of biomass contaminated with heavy metals and reduces biomass loss.

[0016] This invention pumps acid into a mixing chamber using an infusion assembly. The mixing blades of the mixing mechanism stir and mix the heavy metal-contaminated biomass and the acid, achieving thorough mixing to remove the heavy metals from the biomass. Simultaneously, the scraping assembly, following the rotation of the mixing shaft, scrapes off the heavy metal-contaminated biomass adhering to the inner wall of the mixing chamber and back into the mixing area, reducing the loss and adhesion of the heavy metal-contaminated biomass and improving its utilization rate.

[0017] This invention uses a bidirectional piston pump to transport the mixed solution in the stirring chamber to the centrifuge chamber and then into the centrifuge shroud. The centrifuge shroud is driven to rotate by a drive assembly to achieve the separation of biomass and acid, while the biomass remains in the centrifuge shroud and is collected by the centrifuge shroud.

[0018] The acid solution separated by the centrifuge can enter the filtration chamber through the liquid passage holes on the liquid plate. The acid solution is filtered by the activated carbon layer and the modified filter layer to remove heavy metals. The filtered acid solution can be discharged from the tank through the drain pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a heavy metal pollution biomass metal washing device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the centrifuge shroud of this utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of the centrifuge shroud of this utility model. Figure 2 .

[0022] The attached diagram is labeled as follows: 1 is the tank body, 2 is the stirring chamber, 3 is the centrifuge chamber, 4 is the filter chamber, 5 is the feed port, 6 is the stirring shaft, 7 is the stirring blade, 8 is motor one, 9 is the connecting rod, 10 is the scraper, 11 is the baffle, 12 is the bidirectional piston pump, 13 is the liquid conveying plate, 14 is the liquid conveying hole, 15 is the protective cover, 16 is motor two, 17 is the centrifuge plate, 18 is the centrifuge rotor, 19 is the centrifuge partition, 20 is the filtrate hole, 21 is the centrifuge discharge hole, 22 is the discharge hole, 23 is the clamping plate, 24 is the activated carbon layer, 25 is the modified filter layer, 26 is the drain pipe, 27 is the acid tank, 28 is the acid-resistant pipe, 29 is the acid pump, and 30 is the spray head. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figures 1-3 As shown, a heavy metal contaminated biomass metal washing device includes a tank 1 and a liquid delivery assembly. The top of the tank 1 has a feed inlet 5. The interior of the tank 1, from top to bottom, comprises a stirring chamber 2, a centrifuge chamber 3, and a filter chamber 4. The liquid delivery assembly is connected to the stirring chamber 2, and a stirring mechanism is rotatably installed inside the stirring chamber 2. In this embodiment, the tank 1 is made of a corrosion-resistant material, such as fiberglass. A feed hood is fixedly installed at the top of the tank 1 corresponding to the feed inlet 5, to facilitate the feeding of heavy metal contaminated biomass into the stirring chamber 2 through the feed inlet 5. The upper part of the tank 1 has a cylindrical structure, the middle part has a square structure, and the lower part has a frustum-shaped structure.

[0025] A baffle 11 is fixedly installed between the stirring chamber 2 and the centrifuge chamber 3, and a bidirectional piston pump 12 is installed on the baffle 11. A centrifugation mechanism is installed inside the centrifuge chamber 3, which includes a drive assembly and a centrifuge shroud. The drive assembly is connected to the centrifuge shroud. In this embodiment, the baffle 11 separates the stirring chamber 2 and the centrifuge chamber 3. The bidirectional piston pump 12 can transport the mixed solution of heavy metal contaminated biomass and acid in the stirring chamber 2 to the centrifuge chamber 3, and allow the mixed solution to enter the centrifuge shroud. The drive assembly drives the centrifuge shroud to rotate. During the rotation of the centrifuge shroud, the acid and biomass are separated, and the acid is thrown out of the centrifuge shroud to collect the biomass.

[0026] A liquid-passing plate 13 is fixedly installed between the centrifuge chamber 3 and the filter chamber 4. The liquid-passing plate 13 is provided with a plurality of liquid-passing holes 14. A filter layer is provided inside the filter chamber 4. In this embodiment, the liquid-passing plate 13 serves to separate the centrifuge chamber 3 and the filter chamber 4. There are two liquid-passing holes 14. The acid solution separated by the centrifuge can enter the filter chamber 4 through the liquid-passing holes 14 and be filtered by the filter layer to remove heavy metals from the acid solution.

[0027] The infusion assembly includes an acid tank 27 and an acid-resistant pipe 28. One end of the acid-resistant pipe 28 is connected to the acid tank 27, and the other end extends into the interior of the stirring chamber 2 and is connected to a spray head 30. An acid pump 29 is installed on the acid-resistant pipe 28. In this embodiment, the acid tank 27 is made of a highly corrosion-resistant material, such as fiberglass. The acid-resistant pipe 28 is an acid-resistant pipe that mainly transports acidic liquids. The spray head 30 is an acid-resistant spray head. The acid pump 29 is a water pump specifically designed for transporting acidic liquids. The acid tank 27 stores acid, which is sulfuric acid or hydrochloric acid with a mass fraction of 0.5% to 5%. The acid pump 29 sprays the acid from the acid tank 27 into the stirring chamber 2 through the acid-resistant pipe 28 and the spray head 30, effectively leaching heavy metals from the biomass contaminated with heavy metals.

[0028] The stirring mechanism includes a stirring shaft 6, stirring blades 7, and a scraping assembly. A motor 8 is installed on the top of the tank 1. The upper end of the stirring shaft 6 is connected to the output end of the motor 8, and multiple stirring blades 7 are installed on the lower end. In this embodiment, the stirring shaft 6, stirring blades 7, and scraping assembly are made of high-strength ceramic material to avoid adverse reactions with heavy metals and ensure the safety of the processing and the purity of the materials. When the motor 8 is turned on, the output end of the motor 8 drives the stirring shaft 6 to rotate, and the stirring shaft 6 drives the stirring blades 7 to rotate, thereby achieving the effect of stirring and mixing the heavy metal-contaminated biomass and acid, so that the heavy metal-contaminated biomass and acid are fully mixed and the heavy metals are separated.

[0029] The scraping assemblies are symmetrically arranged on the stirring shaft 6. Each scraping assembly includes a connecting rod 9 and a scraper 10. The two ends of the connecting rod 9 are fixedly connected to the stirring shaft 6 and the scraper 10, respectively. The scraper 10 contacts the inner wall of the tank 1. In this embodiment, there are two scraping assemblies on the stirring shaft 6. During the rotation of the stirring shaft 6, the connecting rod 9 rotates, which in turn drives the scraper 10 to rotate, scraping away the heavy metal-contaminated biomass adhering to the inside of the stirring chamber 2, so that the heavy metal-contaminated biomass returns to the stirring area.

[0030] The centrifuge hood includes a centrifuge plate 17, a centrifuge rotor 18, and centrifuge partitions 19. The centrifuge rotor 18 is fixedly mounted on the top of the centrifuge plate 17, and centrifuge partitions 19 are fixedly mounted around the centrifuge plate 17. One of the centrifuge partitions 19 has a centrifuge discharge hole 21 at its lower part, and a discharge gate is provided at the centrifuge discharge hole 21. A discharge hole 22 is provided on the tank body 1 at the position corresponding to the centrifuge hood, and a discharge gate is provided at the discharge hole 22. The other three centrifuge partitions 19 are provided with multiple filtrate holes 20. In this embodiment, the centrifuge rotor 18 has an arc-shaped structure, and its diameter gradually increases from top to bottom, which is intended to improve the centrifugation effect on the mixed solution. The discharge gate is hinged to the centrifuge partition 19, and the discharge gate is hinged to the tank body 1. When it is necessary to remove the biomass from the centrifuge hood, the centrifuge discharge hole 21 and the discharge hole 22 are aligned, and the discharge gate and discharge gate are opened to perform the material removal operation.

[0031] A protective cover 15 is fixedly installed on the top of the liquid-passing plate 13, and the driving component is located inside the protective cover 15. The driving component is a second motor 16, and the output end of the second motor 16 passes through the protective cover 15 and is connected to the centrifuge plate 17. In this embodiment, the protective cover 15 protects the second motor 16 from damage caused by the acid. When the second motor 16 is turned on, its output end drives the centrifuge plate 17 to achieve the separation of acid and biomass.

[0032] The filter layer includes an activated carbon layer 24 and a modified filter layer 25, with the activated carbon layer 24 located above the modified filter layer 25. A retaining plate 23 is fixedly installed on the inner wall of the filter chamber 4, and both the activated carbon layer 24 and the modified filter layer 25 are secured within the retaining plate 23. An inspection door is provided on the tank body 1 at the position corresponding to the filter layer, and a drain pipe 26 connected to the filter chamber 4 is also provided at the lower part of the tank body 1. In this embodiment, the inspection door is connected to the tank body 1 via a hinge, facilitating the replacement of the activated carbon layer 24 and the modified filter layer 25 under the action of the retaining plate 23. The drain pipe 26 also uses an acid-resistant pipe. The activated carbon layer 24, with its high adsorption capacity, serves as a pre-filtration layer, effectively removing most of the heavy metal ions from the acid solution. The modified filter layer 25 uses surface-modified nanomaterials or ion exchange resins, which, by introducing special functional groups onto their surface, enhance their affinity for specific heavy metal ions, achieving finer filtration.

[0033] The working principle of this utility model is as follows: When it is necessary to pretreat heavy metal polluted biomass, the heavy metal polluted biomass is transported to the stirring chamber 2 through the feed hole 5, and the acid pump 29 is turned on. The acid in the acid tank 27 is pumped into the acid-resistant pipe 28 by the acid pump 29, and the acid is sprayed into the stirring chamber 2 through the spray head 30. Then, the motor 8 is turned on. The output end of the motor 8 drives the stirring shaft 6 to rotate. The stirring shaft 6 drives the stirring blade 7 to rotate to stir and mix the heavy metal polluted biomass and the acid, so that the heavy metal polluted biomass and the acid are fully mixed to precipitate the heavy metal. During this process, the scraper 10 follows the rotation of the stirring shaft 6 through the connecting rod 9. The scraper 10 scrapes off the heavy metal polluted biomass adhering to the inner wall of the stirring chamber 2.

[0034] After the heavy metal-contaminated biomass and acid in the stirring chamber 3 are fully mixed and reacted, the bidirectional piston pump 12 and motor 16 are turned on. The bidirectional piston pump 12 transports the mixed solution in the stirring chamber 2 to the centrifuge chamber 3 and allows the mixed solution to enter the centrifuge hood. The output end of motor 16 drives the centrifuge plate 17 to rotate. The centrifuge plate 17 drives the centrifuge core 18 and centrifuge partition 19 to rotate to separate the biomass and acid. The acid is discharged through the filter hole 20 and enters the filter chamber 4 through the liquid passage hole 14. The activated carbon layer 24 and the modified filter layer 25 filter the heavy metals in the acid. Then the filtered acid is discharged through the drain pipe 26 and transported to the waste liquid tank or waste liquid trough.

[0035] When it is necessary to discharge the biomass from the centrifuge hopper, turn off motor 211 so that the centrifuge discharge port 21 and discharge port 22 are aligned, and then open the discharge gate and discharge gate to carry out the material handling operation.

[0036] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A heavy metal contamination biomass metal washing device, comprising a tank (1), characterized in that, It also includes an infusion assembly. The top of the tank (1) is provided with a feed hole (5). The inside of the tank (1) is provided with a stirring chamber (2), a centrifuge chamber (3) and a filter chamber (4) from top to bottom. The infusion assembly is connected to the stirring chamber (2). The stirring chamber (2) is provided with a stirring mechanism that rotates inside. A baffle (11) is fixedly provided between the stirring chamber (2) and the centrifuge chamber (3), and a bidirectional piston pump (12) is provided on the baffle (11); a centrifuge mechanism is provided inside the centrifuge chamber (3), the centrifuge mechanism includes a drive assembly and a centrifuge shroud, and the drive assembly is connected to the centrifuge shroud; A liquid-passing plate (13) is fixedly arranged between the centrifuge chamber (3) and the filter chamber (4), and a plurality of liquid-passing holes (14) are arranged on the liquid-passing plate (13); a filter layer is arranged inside the filter chamber (4).

2. The heavy metal contaminated biomass metal washing device according to claim 1, characterized in that, The infusion assembly includes an acid tank (27) and an acid-resistant pipe (28). One end of the acid-resistant pipe (28) is connected to the acid tank (27), and the other end of the acid-resistant pipe (28) extends into the interior of the stirring chamber (2) and is connected to a spray head (30). An acid pump (29) is installed on the acid-resistant pipe (28).

3. The heavy metal contaminated biomass metal washing device according to claim 1, characterized in that, The stirring mechanism includes a stirring shaft (6), stirring blades (7) and a scraping assembly. A motor (8) is provided on the top of the tank (1). The upper end of the stirring shaft (6) is connected to the output end of the motor (8), and a plurality of stirring blades (7) are provided on the lower end.

4. The heavy metal contaminated biomass metal washing device according to claim 3, characterized in that, The scraping assembly is symmetrically arranged on the stirring shaft (6). The scraping assembly includes a connecting rod (9) and a scraper (10). The two ends of the connecting rod (9) are fixedly connected to the stirring shaft (6) and the scraper (10) respectively. The scraper (10) is in contact with the inner wall of the tank (1).

5. The heavy metal contaminated biomass metal washing device according to claim 1, characterized in that, The centrifuge hood includes a centrifuge plate (17), a centrifuge rotor (18), and centrifuge partitions (19). The centrifuge rotor (18) is fixedly installed on the top of the centrifuge plate (17). The centrifuge partitions (19) are fixedly installed around the centrifuge plate (17). One of the centrifuge partitions (19) has a centrifuge discharge hole (21) at its lower part and a discharge gate is provided at the centrifuge discharge hole (21). The tank body (1) has a discharge hole (22) at the position corresponding to the centrifuge hood and a discharge gate is provided at the discharge hole (22). The other three centrifuge partitions (19) are provided with multiple filtrate holes (20).

6. The heavy metal contaminated biomass metal washing device according to claim 5, characterized in that, A protective cover (15) is fixedly installed on the top of the liquid transfer plate (13), and the drive assembly is located inside the protective cover (15); the drive assembly is a second motor (16), the output end of the second motor (16) passes through the protective cover (15) and is connected to the centrifuge plate (17).

7. The heavy metal contaminated biomass metal washing device according to claim 1, characterized in that, The filter layer includes an activated carbon layer (24) and a modified filter layer (25), with the activated carbon layer (24) located above the modified filter layer (25); a clamping plate (23) is fixedly installed on the inner wall of the filter chamber (4), and the activated carbon layer (24) and the modified filter layer (25) are both clamped in the clamping plate (23); an inspection door is provided on the tank (1) at the position corresponding to the filter layer, and a drain pipe (26) connected to the filter chamber (4) is also provided at the lower part of the tank (1).

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