Preparation method of microbial flocculant for removing heavy metal silver ion in sewage

Abstract

The application belongs to the technical field of sewage treatment, and particularly relates to a preparation method of a microbial flocculant for removing heavy metal silver ions in sewage, which comprises the following steps: S3, pouring prepared polyacrylamide, acid polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution into a stirring tank in sequence, and fully mixing and uniformly distributing the solutions under the action of a stirring mechanism. The preparation method of the microbial flocculant for removing heavy metal silver ions in sewage is characterized in that the stirring mechanism is arranged to facilitate mixing of various solutions together, the rotation of the driving motor output shaft drives the rotation of the connected rotating shaft, the rotation of the rotating shaft drives the rotation of the first stirring roller, the driving shaft is driven to rotate under the action of the first conveying belt and the second conveying belt, and the second stirring roller is further driven to rotate, the rotation of the first stirring roller and the second stirring roller stirs the solution, and the second stirring roller is facilitated to move slowly in a ring shape, so that the solutions are fully mixed.

Description

TECHNICAL FIELD

[0001] The present application relates to sewage treatment technical field, especially to a kind of preparation method of microbial flocculants for removing heavy metal silver ion in sewage. BACKGROUND

[0002] Microbial flocculants is a kind of metabolite produced by microorganism, which is obtained by fermentation, extraction and refining of bacteria, fungi and other microorganisms using microbial technology, and is a high-efficiency, non-toxic and non-secondary pollution water treatment agent with biological decomposition and safety.

[0003] The existing microbial flocculants usually need a certain reaction time to play the best flocculation effect in the use process, so the treatment speed is relatively slow, and it is not suitable for occasions that need to be treated quickly. In order to improve the treatment efficiency of the flocculant, some components are added according to the needs, and they are fully stirred to ensure that they can be fully dissolved and uniformly mixed together. However, the single stirring method not only has too low stirring efficiency, but also easily leads to insufficient mixing of various components, which affects the quality and effect of the final product. SUMMARY

[0004] Based on the above technical problems, the present application provides a preparation method of microbial flocculants for removing heavy metal silver ion in sewage, and especially provides a stirring tank.

[0005] The microbial flocculants for removing heavy metal silver ion in sewage according to the present application comprises the following components: polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide.

[0006] Among them, polyacrylamide is 30%-40% by percentage, acidic polysaccharide is 5%-10%, protein is 5%-10%, iron oxide is 5%-10%, humic acid is 5%-10%, succinic acid is 5%-10%, and sodium hydroxide is 5%-10%.

[0007] The preparation method is as follows:

[0008] S1, select microbial strain for preparing microbial flocculants-polymer bacteria, extract acidic polysaccharide by fermentation and culture.

[0009] S2, prepare polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution, and according to the needs and proportion requirements, respectively configure appropriate amount of solution of each substance.

[0010] S3, pour the prepared polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution into the stirring tank gradually, and make them fully mixed and uniform under the action of stirring mechanism.

[0011] S4. Adjust the pH value of the solution during the mixing process.

[0012] S5. After mixing, the solution is filtered through a filtration mechanism and then enters the collection tank.

[0013] Preferably, the stirring mechanism includes a tripod fixedly mounted on the outer surface of the stirring tank by fastening bolts, a drive motor fixedly mounted on the upper surface of the tripod, a rotating shaft fixedly sleeved at one end of the output shaft of the drive motor, the rotating shaft being mounted on the surface of the tripod by bearings, and a first stirring roller being arranged in a ring array on the surface of the stirring tank through the tripod.

[0014] The above technical solution involves mounting the drive motor on the mixing tank using a tripod bracket, and rotating the output shaft of the drive motor to drive the rotating shaft connected to it to rotate, which in turn drives the first mixing roller connected to it to rotate.

[0015] Preferably, a fixed gear and a turntable are respectively mounted on the surface of the rotating shaft via bearings. The upper surface of the fixed gear is fixedly connected to the lower surface of the tripod via a support column. The surface of the rotating shaft is mounted to the axis of the turntable via bearings. Three drive shafts are arranged in a circular array on the surface of the turntable. All three drive shafts are mounted on the surface of the turntable via bearings. A first transmission belt is connected to the surface of one of the drive shafts via a pulley drive. A second transmission belt is connected between the three drive shafts via pulley drives.

[0016] Through the above technical solution, the rotation of the rotating shaft drives the drive shaft connected to it to rotate via the first transmission belt, and the rotation of the drive shaft drives the other two drive shafts to rotate in the same direction via the second transmission belt.

[0017] Preferably, drive gears are fixedly sleeved on the surfaces of the three drive shafts, and the three drive gears mesh with the fixed gears. The surfaces of the three drive shafts extending into the mixing tank are provided with second stirring rollers in a circular array, and the first stirring rollers and the second stirring rollers are staggered.

[0018] Through the above technical solution, the rotation of the drive shaft drives the drive gear to rotate, and the rotation of the drive gear causes it to move along the surface of the fixed gear, thereby driving the turntable to rotate. This facilitates the second stirring roller to move in a ring along the inner wall of the mixing tank during the rotation process, making the mixing more thorough.

[0019] Preferably, the inner wall of the rotating disc is provided with a cavity, the inner wall of the cavity is provided with a rotating ring, the lower surface of the rotating ring is fixedly installed with a hydraulic clamping ring, the surface of the rotating shaft is installed with the inner wall of the rotating ring through a bearing, the surface of the rotating ring is provided with an arc-shaped slot in a ring array, the inner wall of the arc-shaped slot is slidably connected with a clamping column, the lower end of the clamping column is fixedly sleeved with a T-shaped plate, the inner wall of the cavity is fixedly connected with a fixed sleeve rod, the inner wall of the fixed sleeve rod is slidably connected with a sliding sleeve rod, the two ends of the T-shaped plate pass through the fixed sleeve rod through a connecting column and are fixedly connected with the surface of the sliding sleeve rod, and the end of the sliding sleeve rod away from the fixed sleeve rod is fixedly connected with a clamping plate.

[0020] Through the above technical scheme, the rotating shaft is clamped by the hydraulic clamping ring, so that the rotation of the rotating shaft drives the rotating ring to rotate through the hydraulic clamping ring, the rotation of the rotating ring drives the clamping column to move along the inner wall of the arc-shaped slot, the movement of the clamping column drives the T-shaped plate connected therewith to move, the movement of the T-shaped plate drives the sliding sleeve rod to move along the inner wall of the fixed sleeve rod through the connecting column, and the movement of the sliding sleeve rod drives the clamping plate to move.

[0021] Preferably, the inner wall of the stirring tank is provided with a sliding clamping groove, the surface of the clamping plate is slidably connected with the inner wall of the sliding clamping groove, the lower surface of the sliding clamping groove is provided with a positioning hole, and the lower surface of the clamping plate is fixedly connected with a positioning column.

[0022] Through the above technical scheme, the positioning column is aligned with the positioning hole, and as the clamping plate moves into the sliding clamping groove, the positioning column also enters the sliding clamping groove, and the clamping plate and the positioning column move along the inner wall of the sliding clamping groove when the rotating disc rotates.

[0023] Preferably, the filtering mechanism comprises a filter screen frame slidably inserted into the tank opening of the collecting tank, the upper surface of the filter screen frame is fixedly installed with a side plate, one side surface of the side plate is fixedly installed with a first electric telescopic rod, the lower surface of one end of the first electric telescopic rod away from the side plate is installed with a second electric telescopic rod through a bearing, and one end of the second electric telescopic rod away from the first electric telescopic rod is fixedly connected with a cleaning brush.

[0024] Through the above technical scheme, the expansion of the first electric telescopic rod drives the second electric telescopic rod and the cleaning brush to move left and right, and the expansion of the second electric telescopic rod drives the cleaning brush to move up and down, so that the cleaning brush contacts the filter screen.

[0025] Preferably, the surface of the first electric telescopic rod is fixedly installed with a rotary motor, and one end of the output shaft of the rotary motor is fixedly sleeved with one end of the second electric telescopic rod.

[0026] Through the technical scheme, the rotation of the rotating shaft of the rotating motor drives the second electric telescopic rod to rotate, and the rotation of the second electric telescopic rod drives the cleaning brush to rotate, thereby preventing the mesh holes of the filter screen from being blocked.

[0027] Preferably, the surface of the rotating disc is fixedly connected with a feeding pipe, and the bottom of the stirring tank is fixedly connected with a double-head pipe with a valve.

[0028] Through the technical scheme, the polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution are poured into the stirring tank through the feeding pipe in sequence, and after the stirring is completed, the valve on the double-head pipe is opened, so that the liquid enters the collecting tank through the double-head pipe.

[0029] The beneficial effects of the present application are:

[0030] 1. The microbial flocculant composed of polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and iron hydroxide can effectively agglomerate heavy metal silver ions and enhance the flocculation effect on heavy metal silver ions, thereby promoting the settlement or filtration of the heavy metal silver ions, and achieving the effect of purifying water bodies.

[0031] 2. The stirring mechanism is arranged, so as to facilitate the stirring and mixing of the polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution poured into the stirring tank, and the rotation of the rotating shaft driven by the output shaft of the driving motor drives the first stirring roller to rotate, and the three driving shafts are driven to rotate under the action of the first and second conveying belts, thereby driving the second stirring roller to rotate. The solution is stirred through the interaction of the first and second stirring rollers, and the solution is slowly moved along the surface of the fixed gear under the rotation of the driving gear, so as to fully mix the solution.

[0032] 3. The filtering mechanism is arranged, so as to remove impurities in the mixed liquid, replace the filtering device, clean the surface of the filter screen on the filtering frame, and prevent the filter holes from being blocked by impurities. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A schematic diagram of a preparation method of a microbial flocculant for removing heavy metal silver ions in sewage is provided in the present application.

[0034] Figure 2 A stirring tank structure perspective view of a preparation method of a microbial flocculant for removing heavy metal silver ions in sewage is provided in the present application.

[0035] Figure 3 A double-head pipe structure perspective view of a preparation method of a microbial flocculant for removing heavy metal silver ions in sewage is provided in the present application.

[0036] Figure 4 This is a three-dimensional view of the positioning hole structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0037] Figure 5 This is a three-dimensional view of the rotating disk structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0038] Figure 6 This is a three-dimensional view of the support structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0039] Figure 7 This is a three-dimensional diagram of the plate structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0040] Figure 8 This is a three-dimensional diagram of the ring structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0041] Figure 9 This is a three-dimensional view of a T-shaped plate structure for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0042] Figure 10 This is a three-dimensional view of the first stirring roller structure in a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0043] Figure 11 This is a three-dimensional view of the cleaning brush structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0044] Figure 12 This is a three-dimensional view of the filter screen structure of a method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, as proposed in this invention.

[0045] In the figure: 1, stirring tank; 2, tripod; 201, driving motor; 202, rotating shaft; 203, first stirring roller; 204, fixed gear; 205, rotating disc; 206, support column; 207, driving shaft; 208, first conveying belt; 209, second conveying belt; 210, driving gear; 211, second stirring roller; 212, cavity; 213, rotating ring; 214, hydraulic clamping ring; 215, arc-shaped groove; 216, clamping column; 217, T-shaped plate; 218, fixed sleeve rod; 219, sliding sleeve rod; 220, connecting column; 221, clamping plate; 222, sliding clamping groove; 223, positioning hole; 224, positioning column; 3, filter screen frame; 31, side plate; 32, first electric telescopic rod; 33, second electric telescopic rod; 34, cleaning brush; 35, rotating motor; 4, collecting tank; 5, feeding pipe; 6, double-head pipe. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0047] All raw materials of the present embodiment can be obtained by market purchase.

[0048] Reference Figures 1-12 A preparation method of a microbial flocculant for removing heavy metal silver ions in sewage, the microbial flocculant comprising the following components: polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and iron hydroxide.

[0049] Among them, the polyacrylamide is 30%-40% by percentage, the acidic polysaccharide is 5%-10%, the protein is 5%-10%, the iron oxide is 5%-10%, the humic acid is 5%-10%, the succinic acid is 5%-10%, and the iron hydroxide is 5%-10%.

[0050] The microbial flocculant composed of polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and iron hydroxide can effectively coagulate heavy metal silver ions and enhance the flocculation effect on heavy metal silver ions, so as to promote the settlement or filtration of the heavy metal silver ions, and achieve the effect of purifying water bodies.

[0051] The preparation method is as follows:

[0052] S1, selecting a microbial strain for preparing the microbial flocculant, i.e., polysaccharide bacteria, and extracting the acidic polysaccharide by fermentation and culture.

[0053] S2, preparing the polyacrylamide, the acidic polysaccharide, the protein, the iron oxide, the humic acid, the succinic acid and the sodium hydroxide solution, and respectively configuring appropriate solutions of each substance according to the requirements and proportion requirements.

[0054] S3. Gradually pour the prepared polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution into the mixing tank 1, and mix them thoroughly under the action of the stirring mechanism.

[0055] S4. Adjust the pH value of the solution during the mixing process.

[0056] S5. After mixing, the solution is filtered through the filtration mechanism and then enters the collection tank 4.

[0057] In order to mix the solutions poured into the mixing tank 1, the stirring mechanism includes a tripod 2 fixedly mounted on the outer surface of the mixing tank 1 by fastening bolts. A drive motor 201 is fixedly mounted on the upper surface of the tripod 2. A rotating shaft 202 is fixedly sleeved at one end of the output shaft of the drive motor 201. The rotating shaft 202 is mounted on the surface of the tripod 2 by bearings, and the rotating shaft 202 extends through the tripod 2 to the surface inside the mixing tank 1. The first stirring rollers 203 are arranged in a ring array. The drive motor 201 is mounted on the mixing tank 1 by the tripod 2, and the rotation of the output shaft of the drive motor 201 drives the rotating shaft 202 connected to it to rotate. The rotation of the rotating shaft 202 drives the first stirring rollers 203 connected to it to rotate.

[0058] To ensure more thorough mixing, fixed gears 204 and a turntable 205 are mounted on the surface of the rotating shaft 202 via bearings. The upper surface of the fixed gear 204 is fixedly connected to the lower surface of the tripod 2 via a support column 206. The surface of the rotating shaft 202 is mounted to the axis of the turntable 205 via bearings. Three drive shafts 207 are arranged in a circular array on the surface of the turntable 205. All three drive shafts 207 are mounted on the surface of the turntable 205 via bearings. A first conveyor belt 208 is connected to the surface of one of the drive shafts 207 via a pulley drive. A second conveyor belt 209 is connected between the three drive shafts 207 via a pulley drive. Drive gears 210 are fixedly sleeved on the surface of each of the three drive shafts 207. All 210 mesh with the fixed gear 204. The three drive shafts 207 extend into the surface of the mixing tank 1 and are arranged in a ring array with the second stirring rollers 211. The first stirring rollers 203 and the second stirring rollers 211 are staggered. The rotation of the rotating shaft 202 drives the drive shaft 207 connected to it to rotate through the first conveyor belt 208. The rotation of the drive shaft 207 drives the other two drive shafts 207 to rotate in the same direction through the second conveyor belt 209. The rotation of the drive shaft 207 drives the drive gear 210 to rotate. The rotation of the drive gear 210 causes it to move along the surface of the fixed gear 204, thereby driving the turntable 205 to rotate. This makes it easier for the second stirring rollers 211 to move in a ring along the inner wall of the mixing tank 1 during rotation, so that the mixing is more thorough.

[0059] In order to limit the rotation of the rotating disc 205, a cavity 212 is formed in the inner wall of the rotating disc 205, the inner wall of the cavity 212 is provided with a rotating ring 213, the lower surface of the rotating ring 213 is fixedly installed with a hydraulic clamping ring 214, the surface of the rotating shaft 202 is installed with the inner wall of the rotating ring 213 through a bearing, the surface of the rotating ring 213 is annularly arrayed and throughly formed with an arc-shaped groove 215, the inner wall of the arc-shaped groove 215 is slidably connected with a clamping column 216, the lower end of the clamping column 216 is fixedly sleeved with a T-shaped plate 217, the inner wall of the cavity 212 is fixedly connected with a fixed sleeve rod 218, the inner wall of the fixed sleeve rod 218 is slidably connected with a sliding sleeve rod 219, the two ends of the T-shaped plate 217 pass through the fixed sleeve rod 218 through a connecting column 220 and are fixedly connected with the surface of the sliding sleeve rod 219, the end of the sliding sleeve rod 219 away from the fixed sleeve rod 218 is fixedly connected with a clamping plate 221, the rotating shaft 202 is clamped by the hydraulic clamping ring 214, so that the rotation of the rotating shaft 202 drives the rotating ring 213 to rotate, the rotation of the rotating ring 213 drives the clamping column 216 to move along the inner wall of the arc-shaped groove 215, the movement of the clamping column 216 drives the T-shaped plate 217 connected therewith to move, the movement of the T-shaped plate 217 drives the sliding sleeve rod 219 to move along the inner wall of the fixed sleeve rod 218 through the connecting column 220, and the movement of the sliding sleeve rod 219 drives the clamping plate 221 to move.

[0060] In order to limit the position of the rotating disc 205, a sliding clamping groove 222 is formed in the inner wall of the stirring tank 1, the surface of the clamping plate 221 is slidably connected with the inner wall of the sliding clamping groove 222, the lower surface of the sliding clamping groove 222 is formed with a positioning hole 223, the lower surface of the clamping plate 221 is fixedly connected with a positioning column 224, the surface of the positioning column 224 is slidably connected with the inner wall of the positioning hole 223, the positioning column 224 is aligned with the positioning hole 223, the clamping plate 221 is moved into the sliding clamping groove 222 to drive the positioning column 224 to enter the sliding clamping groove 222 together, and the clamping plate 221 and the positioning column 224 are driven to move along the inner wall of the sliding clamping groove 222 when the rotating disc 205 rotates.

[0061] By setting the stirring mechanism, the polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution poured into the stirring tank 1 can be stirred and mixed together, and the rotation of the output shaft of the driving motor 201 drives the rotating shaft 202 connected therewith to rotate, the rotation of the rotating shaft 202 drives the first stirring roller 203 to rotate, and the three driving shafts 207 are driven to rotate under the action of the first conveying belt 208 and the second conveying belt 209, thereby driving the second stirring roller 211 to rotate, the solution is stirred through the interaction of the first stirring roller 203 and the second stirring roller 211, and the driving gear 210 is slowly moved along the surface of the fixed gear 204 under the rotation of the driving gear 210, so that the solution can be fully mixed.

[0062] In order to filter the liquid after stirring, the filtering mechanism comprises a filter screen frame 3 slidingly inserted into the opening of the collecting tank 4, the upper surface of the filter screen frame 3 is fixedly provided with a side plate 31, one side surface of the side plate 31 is fixedly provided with a first electric telescopic rod 32, the lower surface of the end of the first electric telescopic rod 32 away from the side plate 31 is provided with a second electric telescopic rod 33 through a bearing, the end of the second electric telescopic rod 33 away from the first electric telescopic rod 32 is fixedly connected with a cleaning brush 34, the second electric telescopic rod 33 and the cleaning brush 34 are driven to move left and right by the extension of the first electric telescopic rod 32, and the cleaning brush 34 is driven to move up and down by the extension of the second electric telescopic rod 33, so that the cleaning brush 34 is in contact with the filter screen.

[0063] In order to drive the cleaning brush 34 to move along the surface of the filter screen, a rotary motor 35 is fixedly installed on the surface of the first electric telescopic rod 32, one end of the output shaft of the rotary motor 35 is fixedly sleeved with one end of the second electric telescopic rod 33, the second electric telescopic rod 33 is driven to rotate by the rotation of the output shaft of the rotary motor 35, the rotation of the second electric telescopic rod 33 drives the cleaning brush 34 to rotate, so as to prevent the mesh of the filter screen from being blocked.

[0064] In order to facilitate the solution of polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide into the stirring tank 1, the surface of the rotating disc 205 is fixedly communicated with a feeding pipe 5, the bottom of the stirring tank 1 is fixedly communicated with a double-head pipe 6 with a valve, the solution of polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide is poured into the stirring tank 1 through the feeding pipe 5 in turn, and the valve on the double-head pipe 6 is opened after stirring is completed, so that the liquid enters the collecting tank 4 through the double-head pipe 6.

[0065] By setting the filtering mechanism, it is convenient to remove impurities in the mixed liquid, replace the filtering device, clean the surface of the filter screen on the filter frame, and prevent the filter holes from being blocked by impurities.

[0066] Working principle: in use, align the position of the positioning column 224 and the positioning hole 223, then install the tripod support 2 on the stirring tank 1 through the fastening bolt, start the hydraulic clamping ring 214 to clamp the rotating shaft 202, then start the driving motor 201, the rotation of the output shaft of the driving motor 201 drives the rotating shaft 202 connected therewith to rotate, the rotation of the rotating shaft 202 drives the rotating ring 213 connected therewith to rotate through the hydraulic clamping ring 214, the rotation of the rotating ring 213 drives the clamping column 216 to move along the inner wall of the arc-shaped groove 215, the movement of the clamping column 216 drives the T-shaped plate 217 connected therewith to move, the movement of the T-shaped plate 217 drives the sliding sleeve rod 219 to move along the inner wall of the fixed sleeve rod 218 through the connecting column 220, the movement of the sliding sleeve rod 219 drives the clamping plate 221 and the positioning column 224 to enter the limiting clamping groove, then stop the driving motor 201, and loosen the hydraulic clamping ring 214 to release the rotating shaft 202;

[0067] Pour the solution of polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide into the stirring tank 1 through the feeding pipe 5 in sequence;

[0068] During the feeding process, start the driving motor 201 again, the rotation of the output shaft of the driving motor 201 drives the rotating shaft 202 connected therewith to rotate, the rotation of the rotating shaft 202 drives the first stirring roller 203 connected therewith to rotate, at the same time, the rotation of the rotating shaft 202 drives the driving shaft 207 connected therewith to rotate through the first transmission belt 208, the rotation of the driving shaft 207 drives the other two driving shafts 207 to rotate in the same direction through the second transmission belt 209, the rotation of the driving shaft 207 drives the second stirring roller 211 to rotate, and the rotation of the driving shaft 207 drives the driving gear 210 to rotate, the rotation of the driving gear 210 drives the rotating disc 205 to move along the surface of the fixed gear 204, thereby driving the second stirring roller 211 to move in a ring shape along the inner wall of the stirring tank 1 during rotation, so that the liquid in the stirring tank 1 can be fully and uniformly mixed;

[0069] After the mixing is completed, open the valve of the double-head pipe 6, so that the liquid in the stirring tank 1 falls onto the filter screen frame 3, and then falls into the collecting tank 4 after being filtered by the filter screen on the filter screen frame 3, and the cleaning brush 34 is brought into contact with the surface of the filter screen on the filter screen frame 3 under the cooperation of the first electric telescopic rod 32 and the second electric telescopic rod 33, the rotation of the output shaft of the rotating motor 35 drives the second electric telescopic rod 33 connected therewith to rotate, the rotation of the second electric telescopic rod 33 drives the cleaning brush 34 to rotate along the surface of the filter screen on the filter screen frame 3, thereby preventing the filter holes of the filter screen from being blocked.

[0070] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for preparing a microbial flocculant for removing heavy metal silver ions from wastewater, characterized in that: The microbial flocculant comprises the following components: polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid, and iron hydroxide. The composition, by percentage, is 30%-40% polyacrylamide, 5%-10% acidic polysaccharides, 5%-10% protein, 5%-10% iron oxide, 5%-10% humic acid, 5%-10% succinic acid, and 5%-10% iron hydroxide; The method for preparing the microbial flocculant includes the following steps: S1. Select a microbial strain for preparing microbial flocculants—polysaccharide bacteria, and extract acidic polysaccharides through culture and fermentation; S2. Prepare polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution, and prepare appropriate amounts of each substance according to the requirements and proportions. S3. Pour the prepared polyacrylamide, acidic polysaccharide, protein, iron oxide, humic acid, succinic acid and sodium hydroxide solution into the mixing tank (1) step by step, and mix them thoroughly and evenly under the action of the stirring mechanism. S4. Adjust the pH value of the solution during the mixing process; S5. After mixing, the solution is filtered by the filtration mechanism and then enters the collection tank (4). The stirring mechanism includes a tripod (2) fixedly mounted on the outer surface of the stirring tank (1) by fastening bolts. A drive motor (201) is fixedly mounted on the upper surface of the tripod (2). A rotating shaft (202) is fixedly sleeved on one end of the output shaft of the drive motor (201). The rotating shaft (202) is mounted on the surface of the tripod (2) by bearings. The rotating shaft (202) extends through the tripod (2) to the surface inside the stirring tank (1) and is provided with first stirring rollers (203) arranged in a ring array. The surface of the rotating shaft (202) is respectively mounted with a fixed gear (204) and a turntable (205) via bearings. The upper surface of the fixed gear (204) is fixedly connected to the lower surface of the tripod (2) via a support column (206). The surface of the rotating shaft (202) is mounted to the axis of the turntable (205) via bearings. The surface of the turntable (205) is arranged with three drive shafts (207) in a circular array. All three drive shafts (207) are mounted on the surface of the turntable (205) via bearings. The rotating shaft (202) and the surface of one of the drive shafts (207) are connected by a first transmission belt (208) via a pulley drive. The three drive shafts (207) are connected by a second transmission belt (209) via a pulley drive. Drive gears (210) are fixedly sleeved on the surfaces of the three drive shafts (207), and the three drive gears (210) mesh with the fixed gears (204). The surfaces of the three drive shafts (207) extending into the mixing tank (1) are provided with second stirring rollers (211) arranged in a ring array. The first stirring roller (203) and the second stirring roller (211) are staggered. The inner wall of the turntable (205) has a cavity (212), and a rotating ring (213) is provided on the inner wall of the cavity (212). A hydraulic clamping ring (214) is fixedly installed on the lower surface of the rotating ring (213). The surface of the rotating shaft (202) is installed on the inner wall of the rotating ring (213) through a bearing. The surface of the rotating ring (213) has an arc-shaped groove (215) arranged in a ring array. A locking post (216) is slidably engaged with the inner wall of the arc-shaped groove (215). A T-shaped plate is fixedly sleeved on the lower end of the locking post (216). 217), a fixed sleeve rod (218) is fixedly connected to the inner wall of the cavity (212), and a sliding sleeve rod (219) is slidably engaged with the inner wall of the fixed sleeve rod (218). The two ends of the T-shaped plate (217) pass through the fixed sleeve rod (218) through the connecting post (220) and are fixedly connected to the surface of the sliding sleeve rod (219). A clamping plate (221) is fixedly connected to the end of the sliding sleeve rod (219) away from the fixed sleeve rod (218), and a positioning post (224) is fixedly connected to the lower surface of the clamping plate (221).

2. The method for preparing the microbial flocculant for removing heavy metal silver ions from wastewater according to claim 1, characterized in that: The inner wall of the mixing tank (1) is provided with a sliding groove (222), the surface of the plate (221) is slidably connected to the inner wall of the sliding groove (222), the lower surface of the sliding groove (222) is provided with a positioning hole (223), and the surface of the positioning column (224) is slidably engaged with the inner wall of the positioning hole (223).

3. The method for preparing the microbial flocculant for removing heavy metal silver ions from wastewater according to claim 1, characterized in that: The filtration mechanism includes a filter screen frame (3) that is slidably inserted into the opening of the collection tank (4). A side plate (31) is fixedly installed on the upper surface of the filter screen frame (3). A first electric telescopic rod (32) is fixedly installed on one side surface of the side plate (31). A second electric telescopic rod (33) is installed on the lower surface of the end of the first electric telescopic rod (32) away from the side plate (31) via a bearing. A cleaning brush (34) is fixedly connected to the end of the second electric telescopic rod (33) away from the first electric telescopic rod (32).

4. The method for preparing the microbial flocculant for removing heavy metal silver ions from wastewater according to claim 3, characterized in that: A rotary motor (35) is fixedly mounted on the surface of the first electric telescopic rod (32), and one end of the output shaft of the rotary motor (35) is fixedly connected to one end of the second electric telescopic rod (33).

5. The method for preparing the microbial flocculant for removing heavy metal silver ions from wastewater according to claim 1, characterized in that: The surface of the turntable (205) is fixedly connected to the feed pipe (5), and the bottom of the mixing tank (1) is fixedly connected to the double-ended pipe (6) with a valve.

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