High-density sedimentation tank for removing fluorine and heavy metals

Abstract

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a high-density sedimentation tank for removing fluorine and heavy metals, which comprises a high-density sedimentation tank, a dosing tank is fixedly mounted on the left side of the high-density sedimentation tank, an adsorption tank is fixedly mounted on the right side of the high-density sedimentation tank, calcium salt, sodium carbonate and a PAM (polyacrylamide) flocculant are added into the dosing tank, and the adsorption tank is fixedly mounted on the right side of the high-density sedimentation tank. After being stirred and mixed by the mixing assembly, the wastewater enters the high-density sedimentation tank and begins to settle, one part of sludge generated by sedimentation is sent back to the dosing tank by the sludge return pump, the most part of the sludge is discharged by the sludge discharge pump, and the sludge scraping assembly is installed to avoid sludge accumulation; according to the high-density sedimentation tank, residual fluorine ions and heavy metals in wastewater are continuously treated by adding adsorbents such as activated aluminum oxide, bone black and zeolite, after the adsorbents are saturated in adsorption, materials are rapidly changed through the material changing assembly, and the high-density sedimentation tank improves the treatment effect on large-scale fluorine and heavy metals by combining a chemical precipitation method and an adsorption method.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely is a high density sedimentation tank of defluorination and heavy metal removal. BACKGROUND

[0002] Fluorine-containing wastewater refers to industrial wastewater containing high concentration of fluoride ions. Fluoride ions exist widely in nature, but in the process of industrial production, especially in chemical, metallurgical, electronic, pharmaceutical, ceramic, glass and other industries, a large amount of fluorine-containing wastewater is often produced. If these wastewaters are discharged directly without proper treatment, they will have serious impact on the environment and human health.

[0003] For the treatment of fluorine-containing wastewater, there are mainly chemical precipitation method and adsorption method. Chemical precipitation method is to add calcium salt (such as lime) to wastewater, let fluoride ions combine with calcium ions to form calcium fluoride precipitate, and then separate by precipitation to achieve the purpose of defluorination. This method can quickly treat large-scale wastewater, but the water quality after treatment is poor; adsorption method is to use active alumina, bone charcoal, zeolite and other adsorbents to adsorb fluoride ions in wastewater. For example, the active sites on the surface of active alumina can exchange and adsorb fluoride ions. After adsorption saturation, it can be regenerated. This method has good water quality after treatment, but the adsorption capacity is limited.

[0004] In the prior art, the treatment of fluorine-containing wastewater usually uses these two methods, but neither chemical precipitation method nor adsorption method can achieve good treatment effect on large-scale fluorine-containing and heavy metal-containing wastewater. Moreover, the adsorption capacity of active alumina, bone charcoal, zeolite and other adsorbents in adsorption method for fluoride ions is limited. After the adsorbent is saturated, it needs to be replaced quickly to improve the efficiency of wastewater treatment. In order to improve the treatment effect of large-scale fluorine-containing and heavy metal-containing wastewater and quickly replace the adsorbent, we propose a high-density sedimentation tank for defluorination and heavy metal removal. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a high density sedimentation tank of fluorine and heavy metal removal, is fixedly installed with dosing tank to the left side of high density sedimentation tank, is fixedly installed with adsorption tank to the right side of high density sedimentation tank, and the calcium salt, sodium carbonate and PAM flocculant are added respectively in dosing tank through calcium salt feeding pump, sodium carbonate feeding pump and PAM feeding pump, after the stirring mixing of mixing assembly, waste water enters high density sedimentation tank and starts to deposit fluorine, and the sludge produced in deposit enters the sludge outlet pipe through the sludge outlet, part of sludge is pumped back to dosing tank by sludge return pump to improve flocculation effect, and most of sludge is discharged by sludge discharge pump, and the sludge assembly is installed on high density sedimentation tank to avoid sludge accumulation, and after the sedimentation treatment, waste water enters adsorption tank, and the residual fluorine ion and heavy metal in waste water are continuously treated by adding active alumina, bone charcoal, zeolite and other adsorbents, when the adsorbent is saturated, the material is quickly replaced through the material replacement assembly, the high density sedimentation tank combines chemical precipitation method and adsorption method, improves the treatment effect of large-scale fluorine and heavy metal containing, and solves the background problem.

[0006] To realize above-mentioned purpose, the utility model discloses the following technical schemes to be realized: a high density sedimentation tank of fluorine and heavy metal removal, including high density sedimentation tank, the left side of high density sedimentation tank is fixedly installed with dosing tank, the right side of high density sedimentation tank is fixedly installed with adsorption tank, the inside of dosing tank is provided with calcium salt mixing pool, sodium carbonate mixing pool and PAM mixing pool from left to right, the top side of calcium salt mixing pool, sodium carbonate mixing pool and PAM mixing pool is fixedly connected with calcium salt feeding pump, sodium carbonate feeding pump and PAM feeding pump respectively through pipeline, the bottom right side of high density sedimentation tank is provided with sludge outlet, and the output end of sludge outlet is fixedly connected with sludge outlet pipe, the right side of adsorption tank is provided with two groups of sludge discharge pump and a group of sludge return pump, and the input end of two groups of sludge discharge pump and a group of sludge return pump is fixedly connected with sludge outlet pipe, and the output end of sludge return pump is fixedly connected with sludge return pipe, and the output end of sludge return pipe is fixedly connected on calcium salt mixing pool, and the mixing assembly is installed on calcium salt mixing pool, sodium carbonate mixing pool and PAM mixing pool, and the sludge assembly is installed on high density sedimentation tank, and the material replacement assembly is installed in adsorption tank.

[0007] Preferably, the mixing assembly includes a drive motor, the drive motor is fixedly installed on the top side of the dosing tank, the output shaft end of the drive motor penetrates the top side of the dosing tank and is fixedly connected with a stirring rod, and the bottom end of the stirring rod is rotatably connected to the inner wall of the bottom of the dosing tank.

[0008] Preferably, the mud scraping assembly comprises a mounting box fixedly connected to the top of the high-density sedimentation tank, a worm gear rotatably mounted in the mounting box, a worm rotatably penetrating between the front and rear sides of the mounting box, the worm engaging with the worm gear, a driving motor three fixedly installed on the top side of the high-density sedimentation tank, a belt pulley fixedly connected to the front end of the worm and the output shaft end of the driving motor three, a belt tightly sleeved between the two belt pulleys, a cross beam fixedly connected between the left and right sides of the high-density sedimentation tank, a rotating rod rotatably penetrating the cross beam, the top end of the rotating rod penetrating the top side of the high-density sedimentation tank and being inserted into the worm gear, and a plurality of mud scraping plates fixedly installed on the bottom side outer surface of the rotating rod.

[0009] Preferably, the material replacement assembly comprises a placing frame, limit strips fixedly connected to the inner walls of the front and rear sides of the adsorption tank, the front and rear sides of the placing frame being slidably connected to the two groups of limit strips, lifting lugs fixedly connected to the top of the front and rear sides of the placing frame, a filter plate arranged on the bottom of the placing frame, and two groups of lifting mechanisms installed on the front and rear sides of the adsorption tank.

[0010] Preferably, the lifting mechanism comprises a driving motor two fixedly installed on the outer surface of the adsorption tank, an installation plate fixedly connected to the top outer side wall of the adsorption tank, a roller rotatably installed on the installation plate, a winding wheel fixedly connected to the output shaft end of the driving motor two, a steel wire rope slidably connected to the roller, one end of the steel wire rope being fixedly connected to the lifting lug, and the other end of the steel wire rope being fixedly connected to the winding wheel.

[0011] Preferably, the calcium salt mixing tank is communicated with the sodium carbonate mixing tank, the sodium carbonate mixing tank is communicated with the PAM mixing tank, and the PAM mixing tank is communicated with the inside of the high-density sedimentation tank.

[0012] Preferably, a second water outlet is arranged on the inside top side of the high-density sedimentation tank, the high-density sedimentation tank is fixedly communicated with the adsorption tank through the second water outlet, a water inlet is arranged on the left side of the dosing tank, and a first water outlet is arranged on the bottom of the rear side of the adsorption tank.

[0013] The utility model provides a high-density sedimentation tank of defluorination and heavy metal removal, which has the following beneficial effects compared with the prior art:

[0014] 1. The high-density sedimentation tank for removing fluorine and heavy metals, a dosing tank is fixedly installed at the left side of the high-density sedimentation tank, and an adsorption tank is fixedly installed at the right side of the high-density sedimentation tank, calcium salt, sodium carbonate and PAM flocculant are added into the dosing tank through a calcium salt feeding pump, a sodium carbonate feeding pump and a PAM feeding pump respectively, after stirring and mixing through a mixing assembly, the wastewater enters the high-density sedimentation tank to start fluorine removal by sedimentation, the sludge generated by sedimentation enters a sludge outlet pipe through a sludge outlet, part of the sludge is pumped back to the dosing tank by a sludge return pump to improve flocculation effect, most of the sludge is discharged by a sludge discharge pump, a sludge scraping assembly is installed on the high-density sedimentation tank to prevent sludge accumulation, after sedimentation treatment, the wastewater enters the adsorption tank, and active alumina, bone charcoal, zeolite and other adsorbents are added to continue treating residual fluorine ions and heavy metals in the wastewater, when the adsorbents are saturated, the adsorbents are quickly replaced through a material replacement assembly, the high-density sedimentation tank combines chemical precipitation method and adsorption method to improve the treatment effect on large-scale fluorine-containing and heavy metal-containing wastewater. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the utility model main part;

[0016] Figure 2 It is a rear view structural schematic diagram of the utility model main part;

[0017] Figure 3 It is a front view cross section structural schematic diagram of the utility model main part;

[0018] Figure 4 It is the utility model Figure 1 It is the utility model

[0019] Figure 5 It is the utility model Figure 3 It is the utility model

[0020] In the drawing: 1, high-density sedimentation tank; 2, dosing tank; 3, adsorption tank; 4, sludge discharge pump; 5, drive motor one; 6, installation box; 7, sludge return pump; 8, sludge outlet pipe; 9, sludge return pipe; 10, water outlet one; 11, calcium salt feeding pump; 12, sodium carbonate feeding pump; 13, PAM feeding pump; 14, water inlet; 15, calcium salt mixing tank; 16, sodium carbonate mixing tank; 17, PAM mixing tank; 18, stirring rod; 19, crossbeam; 20, rotating rod; 21, sludge scraping plate; 22, sludge outlet; 23, placing frame; 24, lifting lug; 25, filter plate; 26, limiting strip; 27, roller; 28, mounting plate; 29, drive motor two; 30, winding wheel; 31, steel wire rope; 32, worm wheel; 33, worm; 34, belt pulley; 35, drive motor three; 36, belt; 37, water outlet two. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] Please refer to Figures 1-5 The utility model provides a technical scheme: a high density sedimentation tank of fluorine and heavy metal removal, including high density sedimentation tank 1, the left side fixed mounting of high density sedimentation tank 1 has dosing tank 2, the right side fixed mounting of high density sedimentation tank 1 has adsorption tank 3, the inside of dosing tank 2 is provided with calcium salt mixing tank 15, sodium carbonate mixing tank 16 and PAM mixing tank 17 from left to right, the top side of calcium salt mixing tank 15, sodium carbonate mixing tank 16 and PAM mixing tank 17 is fixedly connected with calcium salt feeding pump 11, sodium carbonate feeding pump 12 and PAM feeding pump 13 respectively through pipeline, the bottom right side of high density sedimentation tank 1 is provided with sludge outlet 22, the output end of sludge outlet 22 is fixedly connected with sludge outlet pipe 8, the right side of adsorption tank 3 is provided with two groups of sludge pump 4 and a group of sludge return pump 7, and the input end of the two groups of sludge pump 4 and the group of sludge return pump 7 are fixedly connected with the sludge outlet pipe 8, the output end of sludge return pump 7 is fixedly connected with sludge return pipe 9, and the output end of sludge return pipe 9 is fixedly connected on calcium salt mixing tank 15, and the mixing assembly is installed on calcium salt mixing tank 15, sodium carbonate mixing tank 16 and PAM mixing tank 17, and the sludge scraping assembly is installed on high density sedimentation tank 1, and the material replacement assembly is installed in adsorption tank 3.

[0023] The high density sedimentation tank 1, through the left side fixed mounting of high density sedimentation tank 1 has dosing tank 2, the right side fixed mounting of high density sedimentation tank 1 has adsorption tank 3, in dosing tank 2 through calcium salt feeding pump 11, sodium carbonate feeding pump 12 and PAM feeding pump 13 respectively calcium salt, sodium carbonate and PAM flocculant are added to calcium salt mixing tank 15, sodium carbonate mixing tank 16 and PAM mixing tank 17, after the stirring and mixing of mixing assembly, waste water enters high density sedimentation tank 1 and starts to deposit, and the sludge produced by the deposition enters sludge outlet pipe 8 through sludge outlet 22, a part of the sludge is sent back to dosing tank 2 by sludge return pump 7 through sludge return pipe 9 to improve the flocculation effect, most of the sludge is discharged by sludge pump 4, and the sludge scraping assembly is installed on high density sedimentation tank 1 to avoid sludge accumulation, and after the sedimentation treatment, the waste water enters adsorption tank 3, and the residual fluorine ions and heavy metals in the waste water are further treated by adding active alumina, activated carbon, zeolite and other adsorbents, when the adsorbent is saturated, the material replacement assembly is used for rapid material replacement, and the high density sedimentation tank 1 combines chemical precipitation method and adsorption method, thereby improving the treatment effect on large-scale fluorine and heavy metal containing.

[0024] The mixing assembly comprises a driving motor 5 fixedly installed on the top side of the dosing tank 2, and the output shaft end of the driving motor 5 penetrates through the top side of the dosing tank 2 and is fixedly connected with a stirring rod 18, and the bottom end of the stirring rod 18 is rotatably connected to the inner wall of the bottom of the dosing tank 2.

[0025] When the mixing assembly is used, the stirring rod 18 is driven to rotate by the driving motor 5 to stir the wastewater.

[0026] The mud scraping assembly comprises a mounting box 6 fixedly connected to the top of the high-density sedimentation tank 1, a worm wheel 32 rotatably installed in the mounting box 6, a worm gear 33 rotatably penetrating between the front and rear sides of the mounting box 6, the worm gear 33 meshing with the worm wheel 32, a driving motor three 35 fixedly installed on the top side of the high-density sedimentation tank 1, a belt pulley 34 fixedly connected to the front end of the worm gear 33 and the output shaft end of the driving motor three 35, a belt 36 tightly sleeved between the two belt pulleys 34, a cross beam 19 fixedly connected between the left and right sides of the high-density sedimentation tank 1, a rotating rod 20 rotatably penetrating the cross beam 19, the top end of the rotating rod 20 penetrating the top side of the high-density sedimentation tank 1 and being inserted into the worm wheel 32, and a plurality of mud scraping plates 21 fixedly installed on the bottom side of the rotating rod 20.

[0027] When the mud scraping assembly is used, the worm gear 33 is driven to rotate by the driving motor three 35, the worm wheel 32 is driven to rotate by the worm gear 33, the rotating rod 20 fixedly inserted into the worm wheel 32 is driven to rotate, and the plurality of mud scraping plates 21 fixedly installed on the bottom side of the rotating rod 20 scrape away the sludge on the bottom side of the high-density sedimentation tank 1, so that the sludge accumulation does not affect the wastewater treatment.

[0028] The material changing assembly comprises a placing frame 23, a limiting strip 26 fixedly connected to the front and rear inner walls of the adsorption tank 3, the front and rear sides of the placing frame 23 being slidably connected to the two limiting strips 26, a lifting lug 24 fixedly connected to the top of the front and rear sides of the placing frame 23, a filter plate 25 arranged on the bottom of the placing frame 23, and two lifting mechanisms installed on the front and rear sides of the adsorption tank 3.

[0029] The lifting mechanism comprises a driving motor two 29 fixedly installed on the outer surface of the adsorption tank 3, an installation plate 28 fixedly connected to the top outer wall of the adsorption tank 3, a roller 27 rotatably installed on the installation plate 28, a winding wheel 30 fixedly connected to the output shaft end of the driving motor two 29, a steel wire rope 31 slidably connected to the roller 27, one end of the steel wire rope 31 being fixedly connected to the lifting lug 24, and the other end of the steel wire rope 31 being fixedly connected to the winding wheel 30.

[0030] When the adsorbent on the placing frame 23 is saturated with fluorine ion heavy metal, the winding wheel 30 is rotated by driving the motor 29, so as to store the steel wire rope 31, the steel wire rope 31 slides on the roller 27 to reduce the friction, and the other end of the steel wire rope 31 pulls the lifting lug 24, so as to drive the placing frame 23 to slide on the limiting strip 26 and rise, the adsorbent in the placing frame 23 is quickly replaced when the placing frame 23 rises to a certain height, and the replacement efficiency of the adsorbent is improved.

[0031] The calcium salt mixing pool 15 is communicated with the sodium carbonate mixing pool 16, the sodium carbonate mixing pool 16 is communicated with the PAM mixing pool 17, the PAM mixing pool 17 is communicated with the inside of the high-density sedimentation pool 1, and the wastewater successively enters the calcium salt mixing pool 15, the sodium carbonate mixing pool 16 and the PAM mixing pool 17 and finally enters the high-density sedimentation pool 1.

[0032] The inside of the high-density sedimentation pool 1 is provided with a water outlet two 37 on the top side, the high-density sedimentation pool 1 is fixedly communicated with the adsorption pool 3 through the water outlet two 37, the wastewater treated by sedimentation enters the adsorption pool 3 through the water outlet two 37, the left side of the dosing pool 2 is provided with a water inlet 14, the wastewater enters through the water inlet 14, the back side of the adsorption pool 3 is provided with a water outlet one 10 on the bottom, and the treated wastewater after being adsorbed by the adsorbent and filtered by the filter plate 25 is discharged through the water outlet one 10.

[0033] Working principle: the high density sedimentation tank 1, through the left side fixed installation of dosing tank 2 in high density sedimentation tank 1, the right side fixed installation of adsorption tank 3 in high density sedimentation tank 1, calcium salt, sodium carbonate and PAM flocculant are added into calcium salt mixing tank 15, sodium carbonate mixing tank 16 and PAM mixing tank 17 through calcium salt dosing pump 11, sodium carbonate dosing pump 12 and PAM dosing pump 13 in dosing tank 2 respectively, after stirring and mixing of wastewater by driving motor one 5 driving stirring rod 18 rotation, wastewater enters high density sedimentation tank 1 and begins to deposit, the sludge produced by deposition enters the sludge outlet pipe 8 through the sludge outlet 22, part of the sludge is sent back to dosing tank 2 by sludge return pump 7 through sludge return pipe 9 to improve flocculation effect, most of the sludge is discharged by sludge discharge pump 4, and the worm 33 is driven to rotate by driving motor three 35, and the worm wheel 32 is driven to rotate by the worm 33, and then the rotating rod 20 fixedly inserted on the worm wheel 32 is rotated, so that the bottom side outer surface of the rotating rod 20 is fixedly installed with a plurality of sludge scraping plates 21 to scrape away the sludge on the bottom side of the high density sedimentation tank 1, to avoid the accumulation of sludge affecting wastewater treatment, after the sedimentation treatment, the wastewater enters the adsorption tank 3 through the water outlet two 37, and the residual fluoride ions and heavy metals in the wastewater are further treated by placing active alumina, activated carbon, zeolite and other adsorbents in the placing frame 23, when the adsorbents in the placing frame 23 are saturated with fluoride ions and heavy metals, the steel wire rope 31 is wound by driving motor two 29 to rotate the winding wheel 30, the steel wire rope 31 slides on the roller 27 to reduce the friction, and the other end of the steel wire rope 31 pulls the lifting lug 24, thereby driving the placing frame 23 to slide and rise on the limiting strip 26, when the placing frame 23 rises to a certain height, the adsorbents in the placing frame 23 are quickly replaced, and the replacement efficiency of the adsorbents is improved, the high density sedimentation tank 1 combines chemical precipitation method and adsorption method to improve the treatment effect of large-scale fluoride and heavy metal containing wastewater.

[0034] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0035] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-density sedimentation tank for removing fluoride and heavy metals, comprising a high-density sedimentation tank (1), characterized in that: A dosing tank (2) is fixedly installed on the left side of the high-density sedimentation tank (1), and an adsorption tank (3) is fixedly installed on the right side of the high-density sedimentation tank (1). Inside the dosing tank (2), from left to right, there are a calcium salt mixing tank (15), a sodium carbonate mixing tank (16), and a PAM mixing tank (17). The top sides of the calcium salt mixing tank (15), the sodium carbonate mixing tank (16), and the PAM mixing tank (17) are respectively connected by pipes to a calcium salt dosing pump (11), a sodium carbonate dosing pump (12), and a PAM dosing pump (13). A sludge outlet (22) is opened on the right side of the bottom of the high-density sedimentation tank (1). The output end is fixedly connected to the sludge discharge pipe (8). Two sets of sludge discharge pumps (4) and one set of sludge return pumps (7) are set on the right side of the adsorption tank (3). The input ends of the two sets of sludge discharge pumps (4) and one set of sludge return pumps (7) are fixedly connected to the sludge discharge pipe (8). The output end of the sludge return pump (7) is fixedly connected to the sludge return pipe (9). The output end of the sludge return pipe (9) is fixedly connected to the calcium salt mixing tank (15). The calcium salt mixing tank (15), the sodium carbonate mixing tank (16) and the PAM mixing tank (17) are all equipped with mixing components. The high-density sedimentation tank (1) is equipped with a sludge scraping component. The adsorption tank (3) is equipped with a material replacement component inside.

2. The high-density sedimentation tank for removing fluoride and heavy metals according to claim 1, characterized in that: The mixing component includes a drive motor (5), which is fixedly installed on the top side of the dosing tank (2). The output shaft of the drive motor (5) passes through the top side of the dosing tank (2) and is fixedly connected to a stirring rod (18). The bottom end of the stirring rod (18) is rotatably connected to the bottom inner wall of the dosing tank (2).

3. The high-density sedimentation tank for removing fluoride and heavy metals according to claim 2, characterized in that: The sludge scraping assembly includes a mounting box (6), which is fixedly connected to the top of the high-density sedimentation tank (1). A worm gear (32) is rotatably installed inside the mounting box (6). A worm (33) is rotatably passed between the front and rear sides of the mounting box (6). The worm (33) meshes with the worm gear (32). A drive motor (35) is also fixedly installed on the top side of the high-density sedimentation tank (1). The output shaft end of the drive motor (35) and the front end of the worm (33) are both fixedly connected to pulleys (34). A belt (36) is tensioned and sleeved between the two sets of pulleys (34). A crossbeam (19) is fixedly connected between the left and right sides inside the high-density sedimentation tank (1). A rotating rod (20) is rotatably passed through the crossbeam (19). The top end of the rotating rod (20) passes through the top side of the high-density sedimentation tank (1) and is inserted into the worm gear (32). Several sludge scraping plates (21) are fixedly installed on the bottom outer surface of the rotating rod (20).

4. The high-density sedimentation tank for removing fluoride and heavy metals according to claim 3, characterized in that: The material replacement assembly includes a placement frame (23), and the inner walls of the front and rear sides of the adsorption tank (3) are fixedly connected with limit strips (26). The front and rear sides of the placement frame (23) are slidably connected to two sets of limit strips (26). The top of the front and rear sides of the placement frame (23) are fixedly connected with lifting lugs (24). The bottom of the placement frame (23) is provided with a filter plate (25). The front and rear sides of the adsorption tank (3) are equipped with two sets of lifting mechanisms.

5. A high-density sedimentation tank for removing fluoride and heavy metals according to claim 4, characterized in that: The lifting mechanism includes a second drive motor (29), which is fixedly installed on the outer surface of the adsorption tank (3). An installation plate (28) is fixedly connected to the top outer wall of the adsorption tank (3). A roller (27) is rotatably installed on the installation plate (28). A winding wheel (30) is fixedly connected to the output shaft end of the second drive motor (29). A wire rope (31) is slidably connected to the roller (27). One end of the wire rope (31) is fixedly connected to the lifting lug (24), and the other end of the wire rope (31) is fixedly connected to the winding wheel (30).

6. The high-density sedimentation tank for removing fluoride and heavy metals according to claim 5, characterized in that: The calcium salt mixing tank (15) is connected to the sodium carbonate mixing tank (16), the sodium carbonate mixing tank (16) is connected to the PAM mixing tank (17), and the PAM mixing tank (17) is internally connected to the high-density sedimentation tank (1).

7. The high-density sedimentation tank for removing fluoride and heavy metals according to claim 6, characterized in that: The high-density sedimentation tank (1) has an outlet 2 (37) on its inner top side. The high-density sedimentation tank (1) is fixedly connected to the adsorption tank (3) through the outlet 2 (37). The dosing tank (2) has an inlet (14) on its left side. The adsorption tank (3) has an outlet 1 (10) at the bottom of its rear side.

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