Fluorine-containing wastewater treatment device

Abstract

The utility model provides a fluorine-containing wastewater treatment device, which relates to the field of fluorine-containing wastewater treatment, and comprises a box body and an air flotation device, the box body comprises a reaction zone, a dissolved air water zone, a separation zone, a clear water zone and a slag storage zone which are sequentially communicated, the top of the separation zone is provided with a slag scraping mechanism, and the bottom of the separation zone is provided with a settling zone; and the air flotation device comprises an air dissolving water pump, an air compressor and an air dissolving tank which are arranged outside the box body. The air flotation device for fluorine-containing wastewater treatment has the beneficial effects that after fluorine-containing wastewater enters the box body, most of flocs float to the water surface through the dissolved air water and are scraped into the slag storage area through the slag scraping mechanism, and a small part of flocs enter the sludge discharge hopper and are pumped away at regular intervals through the sludge pump, so that the treatment efficiency is greatly improved, the investment and the occupied area are saved, and the cost is reduced. The problems that the fluorine-containing wastewater treatment efficiency is low and the occupied space is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluorine-containing wastewater treatment, in particular to a fluorine-containing wastewater treatment device. Background Art

[0002] Fluorine pollution refers to environmental pollution caused by fluorine and its compounds, which mainly comes from emissions from aluminum smelting, phosphate ore processing, phosphate fertilizer production, steel smelting and coal combustion. There are many methods for treating fluorine-containing wastewater. The most commonly used method in engineering is chemical flocculation sedimentation. Generally, fluoride ions in wastewater are converted into fluoride precipitates by adding defluoridating agents, and then flocculants and coagulants are added. The precipitates are precipitated into subsequent sedimentation tanks to achieve the purpose of defluoridation.

[0003] Common fluorine wastewater treatment equipment produces a lot of sludge after adding defluorination agents. In order to ensure the effluent effect, the surface load of the subsequent sedimentation tank should not be too large. The radial flow sedimentation tank and the vertical flow sedimentation tank are generally around 0.8m3 / m2.h, and the surface load of the inclined tube sedimentation tank is around 1.5m3 / m2.h. The residence time is about 4-6h. Therefore, the sedimentation tank will be relatively large and occupy a large area. If the fluoride content of the inlet water is higher than 20mg / L and the effluent requirement is less than 1mg / L, it is often necessary to set up a second-stage coagulation sedimentation, which occupies a relatively large area. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a fluorine-containing wastewater treatment device, which solves the problems of low fluorine-containing wastewater treatment efficiency and large floor space.

[0005] To achieve the above objectives, the utility model implements a fluorine-containing wastewater treatment device through the following technical scheme, including a box body and an air flotation device, wherein the box body includes a reaction zone, a gas-dissolving water zone, a separation zone, a clean water zone and a slag storage zone which are connected in sequence, a slag scraping mechanism is arranged in the separation zone, and a sedimentation zone is arranged at the bottom of the separation zone;

[0006] The air flotation device includes an air-dissolving water pump, an air compressor and an air-dissolving tank installed outside the box body. The water-pumping end of the air-dissolving water pump is connected to the clean water area through a water pipe A, and the other end is connected to the air-dissolving tank through a water pipe B. The air compressor is connected to the air-dissolving tank through an air pipe. A water delivery component is installed at one end of the air-dissolving tank, and the water delivery component is used to transport water to the air-dissolving water area.

[0007] Furthermore, a mixed water delivery mechanism is installed outside the box body, and the mixed water delivery mechanism is used to deliver water in the reaction zone and the dissolved gas water zone to the separation zone.

[0008] Furthermore, a clean water pipe is installed inside the box body, and the water in the separation area enters the clean water area through the clean water pipe. A mud discharge bucket is fixedly installed at the bottom of the sedimentation area, and multiple mud discharge pipes are installed at the bottom of the mud discharge bucket. Each mud discharge pipe is fixedly connected to the box body, and multiple mud inlet holes are opened on the outer surface of each mud discharge pipe.

[0009] Furthermore, both sides of the box body are fixedly connected with slide rails, a slag scraping mechanism is installed between the two slide rails, and the slag scraping mechanism is used to scrape the floating slag to the slag storage area, and a slag discharge pipe is installed on the inner wall of the slag storage area.

[0010] Furthermore, the water delivery assembly includes a water delivery pipe A, a water delivery pipe B and multiple water delivery pipes C. The water delivery pipe A is connected to the dissolved air tank and the water delivery pipe B. Both ends of the water delivery pipe B are sealed. The multiple water delivery pipes C are all connected to the water delivery pipe B, and the bottom ends are located inside the dissolved air water area. The water delivery pipes C are fixedly connected to the box.

[0011] Furthermore, the mixed water delivery mechanism includes two water delivery pipes D, a water delivery pipe E and a water pump body. The two water delivery pipes D are respectively connected to the reaction zone and the dissolved gas water zone. The water inlet end of the water pump body is connected to the water delivery pipe E through an external water pipe, and the other end is connected to the separation zone through a water pipe. One end of the water delivery pipe E is sealed.

[0012] Furthermore, a mud pump is fixedly installed at one end of the box body, a mud collecting pipe is installed at one end of the mud pump, one end of the mud collecting pipe is sealed, and each mud discharge pipe is connected to the mud collecting pipe.

[0013] Furthermore, the scraping mechanism includes a bracket, a fixed frame, two electric push rods, a scraper, an inclined plate and a moving vehicle. The top of the inclined plate is in contact with the slag storage area. A plurality of filter holes are provided inside the scraper. The moving vehicle is used to reciprocate along two slide rails. The bracket is fixedly connected to the two moving vehicles. The two electric push rods are fixedly connected to the bracket. The output ends of the two electric push rods are fixedly connected to the fixed frame. The scraper and the fixed frame are rotatably connected via a rotating shaft. Two torsion springs are fixedly installed between the scraper and the fixed frame, and the two torsion springs are in a static state.

[0014] The beneficial effects of the utility model are:

[0015] 1. The flotation device for treating fluorine-containing wastewater, fluorine-containing wastewater enters the reaction zone, and the dosing reaction forms large flocs, which are then mixed with the dissolved air water released from the dissolved air tank and enter the separation zone, where most of the flocs float to the water surface, and the floating scum is scraped to the slag storage area by the scraping mechanism, and the flocs with larger specific gravity enter the sedimentation area at the bottom of the pool, and the clean water enters the clean water area through the clean water pipe. The residence time in the separation zone is short, and it can also ensure that the flocs have enough time to float. After the fluorine-containing wastewater enters the box, most of the flocs float to the water surface through the dissolved air water, and are scraped into the slag storage area by the scraping mechanism, and a small part of the flocs enter the sludge hopper, which is regularly pumped away by the sludge pump, thereby greatly improving the treatment efficiency, saving investment and land, and solving the problems of low fluorine-containing wastewater treatment efficiency and large space occupation.

[0016] 2. The flotation device for treating fluorine-containing wastewater, fluorine-containing wastewater enters the reaction zone, and the dosing reaction forms large flocs, which are then mixed with the dissolved air water released from the dissolved air tank and enter the separation zone, where most of the flocs float to the water surface, and the scum is scraped to the slag storage area by the scraping mechanism, and the flocs with larger specific gravity enter the sedimentation area at the bottom of the pool, and clean water enters the clean water area through the clean water pipe. The sludge hopper and sludge discharge pipe are set up at the bottom to take out the sludge regularly through the sludge pump to ensure that the sludge is fully separated and the fluoride in the effluent meets the discharge standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the box of the utility model;

[0018] Figure 2 It is a cross-sectional view of the front view of the box body of the utility model;

[0019] Figure 3 This is a top view of the box of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the water delivery component of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the scraping mechanism of the utility model.

[0022] Among them, 1. box body; 2. reaction zone; 3. dissolved air water zone; 4. separation zone; 5. clean water zone; 6. sedimentation zone; 7. slag storage zone; 8. dissolved air water pump; 9. air compressor; 10. dissolved air tank; 11. water delivery component; 12. mixed water delivery mechanism; 121. water pump body; 13. clean water pipe; 14. mud discharge pipe; 15. mud inlet hole; 16. slide rail; 17. slag scraping mechanism; 171. bracket; 172. fixed frame; 173. electric push rod; 174. scraper; 175. mobile vehicle; 18. slag discharge pipe; 19. mud pump; 20. mud collecting pipe; 21. inclined plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5 A fluorine-containing wastewater treatment device comprises a housing 1 and an air flotation device, wherein the housing 1 comprises a reaction zone 2, a dissolved air water zone 3, a separation zone 4, a clean water zone 5 and a slag storage zone 7 which are connected in sequence, wherein liquid alkali and a flocculant are added to the reaction zone 2 to form flocs by stirring, a part of the clean water in the clean water zone 5 is converted into dissolved air water by an air flotation machine and then enters the dissolved air water zone 3, and the other part of the water is discharged, and the liquid in the dissolved air water zone 3 and the reaction zone 2 is mixed and enters the separation zone 4, a sedimentation zone 6 is arranged at the bottom of the separation zone 4, and the floating objects in the separation zone 4 enter the slag storage zone 7 through a scraping mechanism 17.

[0025] A water inlet pipe is installed at one end of the box 1, and liquid alkali and flocculant are added through the water inlet pipe to form large flocs. The flotation device includes a dissolved air water pump 8, an air compressor 9 and a dissolved air tank 10 installed outside the box 1. The water pumping end of the dissolved air water pump 8 is connected to the clean water area 5 through a water pipe A, and the other end is connected to the dissolved air tank 10 through a water pipe B. The air compressor 9 is connected to the dissolved air tank 10 through an air pipe. A water delivery component 11 is installed at one end of the dissolved air tank 10. The water delivery component 11 is used to transport water to the dissolved air water area 3. The air is pressurized by the air compressor 9 to dissolve more air in the water, and then a large number of micron-sized small bubbles are precipitated in the water through the non-aggregation of pressure. In the process of the small bubbles floating up, it will absorb the suspended matter and flocs in the sewage and float together, thereby reducing the floating time. The scraping mechanism 17 scrapes into the slag storage area 7, and a part of the flocs enters the sedimentation area 6 and is regularly pumped away through the slag discharge pipe 18 and the mud pump 19. The overall residence time of the flotation machine is designed to be about 1 hour. Compared with the traditional sedimentation tank, the treatment efficiency is improved and the space is saved. The water delivery component 11 includes a water delivery pipe A, a water delivery pipe B and a plurality of water delivery pipes C. The water delivery pipe A is connected to the dissolved air tank 10 and the water delivery pipe B. The two ends of the water delivery pipe B are sealed. The plurality of water delivery pipes C are all connected to the water delivery pipe B, and the bottom end is located inside the dissolved air water area 3. The water delivery pipe C is fixedly connected to the box 1. The water delivery component 11 can transport water to the dissolved air water area 3. The air compressor 9 is used to compress the air and transport it to the dissolved air tank 10. The dissolved air pump 8 pumps water into the dissolved air tank 10. In the dissolved air tank 10, the compressed air The gas and water are fully contacted and mixed. A mixed water delivery mechanism 12 is installed between the reaction zone 2 and the dissolved gas water zone 3. The mixed water delivery mechanism 12 includes two water delivery pipes D, a water delivery pipe E and a water pump body 121. The two water delivery pipes D are respectively connected to the reaction zone 2 and the dissolved gas water zone 3. The water inlet end of the water pump body 121 is connected to the water delivery pipe E through an external water pipe, and the other end is connected to the separation zone 4 through a water pipe. One end of the water delivery pipe E is sealed. The water pump body 121 is used to mix and deliver the water in the reaction zone 2 and the dissolved gas water zone 3 to the separation zone 4, which is convenient for the separation work. The mixed water delivery mechanism 12 is used to deliver the water in the reaction zone 2 and the dissolved gas water zone 3 to the separation zone 4. A clean water pipe 13 is installed inside the box 1. The water in the separation zone 4 enters through the clean water pipe 13 In the clean water area 5, the number of clean water pipes 13 is set to be several, and one end of each clean water pipe 13 is L-shaped, which increases the rate at which water in the clean water pipe 13 enters the clean water area 5 and prevents sediment from falling directly into the clean water pipe 13. A mud discharge bucket 22 is fixedly installed at the bottom of the sedimentation area 6, and a plurality of mud discharge pipes 14 are installed at the bottom of the mud discharge bucket 22. Each mud discharge pipe 14 is fixedly connected to the box body 1, and a plurality of mud inlet holes 15 are opened on the outer surface of each mud discharge pipe 14. A mud pump 19 is fixedly installed at one end of the box body 1, and a mud collecting pipe 20 is installed at one end of the mud pump 19. One end of the mud collecting pipe 20 is sealed, and each mud discharge pipe 14 is connected to the mud collecting pipe 20. The sediment in the plurality of mud discharge pipes 14 can be discharged through the mud pump 19 and the mud collecting pipe 20.The front and back sides of the box body 1 are fixedly connected with slide rails 16, and a scraper mechanism 17 is installed between the two slide rails 16. The scraper mechanism 17 is used to scrape the floating slag to the slag storage area 7. The inner wall of the slag storage area 7 is installed with a slag discharge pipe 18. The scraper mechanism 17 includes a bracket 171, a fixed bracket 172, two electric push rods 173, a scraper 174, an inclined plate 21 and a moving vehicle 175. The top of the inclined plate 21 is in contact with the slag storage area 7. A plurality of filter holes are provided inside the scraper 174. The moving vehicle 175 is used to reciprocate along the two slide rails 16. The bracket 171 is fixedly connected to the two moving vehicles 175. The two electric push rods 173 are provided with a plurality of filter holes. The moving vehicle 175 is used to reciprocate along the two slide rails 16. 3 are fixedly connected to the bracket 171, the output ends of the two electric push rods 173 are fixedly connected to the fixed frame 172, the scraper 174 is rotatably connected to the fixed frame 172 through a rotating shaft, and two torsion springs are fixedly installed between the scraper 174 and the fixed frame 172, and the two torsion springs are in a static state. The two moving vehicles 175 can make the scraper 174 reciprocate, and the two electric push rods 173 can make the scraper 174 rise and fall, which is convenient for scraping slag. The inner wall of the box body 1 is fixedly connected with an inclined plate 21, and the top of the inclined plate 21 contacts the slag storage area 7, which is conducive to the scraper 174 scraping the slag along the inclined plate 21 into the slag storage area 7.

[0026] Working principle:

[0027] First, the fluorine-containing wastewater is injected into the reaction zone 2, and then the liquid alkali and flocculant are added to form large flocs through stirring. Then, the water in the clean water zone 5 is injected into the air dissolving tank 10 through the air dissolving water pump 8. The air compressor 9 is used to compress the air and transport it to the air dissolving tank 10. The air dissolving water pump 8 pumps water into the air dissolving tank 10. The compressed air and water in the air dissolving tank 10 are fully contacted and mixed. At this time, the air is pressurized by the air compressor (9) to make more air dissolve in the water, and then a large number of micron-sized bubbles are precipitated in the water through the pressure non-agglomeration. Later, when the small bubbles float up, they will absorb the pollutants. The suspended matter and flocs in the water float together, thereby reducing the floating time, and then the water in the dissolved air tank 10 is transported to the dissolved air water area 3 through the water delivery component 11, and then the liquid in the reaction area 2 and the dissolved air water released by the dissolved air tank 10 are mixed into the separation area 4 through the water pump body 121 and the mixing water delivery mechanism 12. At this time, during the floating process of small bubbles, it will absorb the suspended matter and flocs in the sewage and float together, floating most of the flocs to the water surface, and the flocs with larger specific gravity enter the sedimentation area 6 at the bottom of the pool, and the larger flocs are regularly discharged through the mud pump 19 and multiple mud discharge pipes 14. The clean water enters the clean water area 5 through the clean water pipe 13, and then enters the dissolved air tank 10 again through the dissolved air pump 8 to form a cycle. Then, the scraper mechanism 17 can be driven to and fro by two mobile vehicles 175. The scraper mechanism 17 is located above the separation area 4. The waste residue is regularly scraped into the residue storage area 7 and discharged from the residue discharge pipe 18 through reciprocating motion to achieve the purpose of sewage purification. The specific working process is as follows: at the beginning of the separation area 4, the scraper 174 is lowered, inserted into the liquid surface, and scraped forward to scrape the residue into the residue storage area 7. At the end, the scraper 174 is lifted and separated from the liquid surface. The scraping mechanism 17 returns to start the next cycle, and the scraping mechanism 17 achieves the purpose of scraping the slag to the slag storage area 7. It should be noted that when the scraper 174 passes through the inclined plate 21, it will tilt under the action of resistance, and drive the residue to move along the inclined surface of the inclined plate 21 to the slag storage area 7. The two torsion springs can make the scraper 174 in close contact with the inclined plate 21 to prevent the residue from leaking. The torsion spring is also conducive to the resetting of the scraper 174, so that the scraper 174 can be vertically downward when not subject to force. Finally, the residue in the slag storage area 7 is discharged from the slag discharge pipe 18.

[0028] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fluorine-containing wastewater treatment device, characterized in that: The invention comprises a housing (1) and an air flotation device, wherein the housing (1) comprises a reaction zone (2), a dissolved air water zone (3), a separation zone (4), a clean water zone (5) and a slag storage zone (7) which are connected in sequence, a slag scraping mechanism (17) is arranged at the top of the separation zone (4), and a sedimentation zone (6) is arranged at the bottom of the separation zone (4); The air flotation device comprises an air-dissolving water pump (8), an air compressor (9) and an air-dissolving tank (10) installed outside a box (1); a water-pumping end of the air-dissolving water pump (8) is connected to a clean water area (5) via a water pipe A, and the other end is connected to the air-dissolving tank (10) via a water pipe B; the air compressor (9) is connected to the air-dissolving tank (10) via an air pipe; a water delivery component (11) is installed at one end of the air-dissolving tank (10); the water delivery component (11) is used to deliver water to the air-dissolving water area (3).

2. A fluorine-containing wastewater treatment device according to claim 1, characterized in that: A mixing water delivery mechanism (12) is installed outside the box (1), and the mixing water delivery mechanism (12) is used to deliver water in the reaction zone (2) and the dissolved gas water zone (3) to the separation zone (4).

3. A fluorine-containing wastewater treatment device according to claim 1, characterized in that: A clean water pipe (13) is installed inside the box (1), and water in the separation zone (4) enters the clean water zone (5) through the clean water pipe (13); a mud discharge bucket (22) is fixedly installed at the bottom of the sedimentation zone (6), and a plurality of mud discharge pipes (14) are installed at the bottom of the mud discharge bucket (22), each mud discharge pipe (14) is fixedly connected to the box (1), and a plurality of mud inlet holes (15) are opened on the outer surface of each mud discharge pipe (14).

4. A fluorine-containing wastewater treatment device according to claim 1, characterized in that: Slide rails (16) are fixedly connected to both sides of the box body (1), a slag scraping mechanism (17) is installed between the two slide rails (16), and the slag scraping mechanism (17) is used to scrape the floating slag to the slag storage area (7). A slag discharge pipe (18) is installed on the inner wall of the slag storage area (7).

5. A fluorine-containing wastewater treatment device according to claim 1, characterized in that: The water delivery assembly (11) comprises a water delivery pipe A, a water delivery pipe B and a plurality of water delivery pipes C. The water delivery pipe A is connected to the dissolved gas tank (10) and the water delivery pipe B. Both ends of the water delivery pipe B are sealed. The plurality of water delivery pipes C are all connected to the water delivery pipe B. The bottom ends of the plurality of water delivery pipes C are located inside the dissolved gas water area (3). The water delivery pipes C are fixedly connected to the box (1).

6. A fluorine-containing wastewater treatment device according to claim 2, characterized in that: The mixed water delivery mechanism (12) comprises two water delivery pipes D, a water delivery pipe E and a water pump body (121). The two water delivery pipes D are respectively connected to the reaction zone (2) and the dissolved gas water zone (3). The water inlet end of the water pump body (121) is connected to the water delivery pipe E via an external water pipe, and the other end is connected to the separation zone (4) via a water pipe. One end of the water delivery pipe E is sealed.

7. A fluorine-containing wastewater treatment device according to claim 3, characterized in that: A mud pump (19) is fixedly mounted on one end of the box body (1), a mud collecting pipe (20) is mounted on one end of the mud pump (19), one end of the mud collecting pipe (20) is sealed, and each mud discharge pipe (14) is connected to the mud collecting pipe (20).

8. A fluorine-containing wastewater treatment device according to claim 1 or 4, characterized in that: The scraping mechanism (17) comprises a bracket (171), a fixed frame (172), two electric push rods (173), a scraper (174), an inclined plate (21) and a moving vehicle (175); the top end of the inclined plate (21) contacts the slag storage area (7); a plurality of filter holes are provided inside the scraper (174); the moving vehicle (175) is used for reciprocating along two slide rails (16); the bracket (171) is fixedly connected to the two moving vehicles (175); the two electric push rods (173) are fixedly connected to the bracket (171); the output ends of the two electric push rods (173) are fixedly connected to the fixed frame (172); the scraper (174) and the fixed frame (172) are rotatably connected via a rotating shaft; and two torsion springs are fixedly installed between the scraper (174) and the fixed frame (172); the two torsion springs are in a static state.

Images