Sulfonamide wastewater treatment device and method

Abstract

The invention discloses a sulfanilamide wastewater treatment device and method in the field of organic wastewater treatment.The device comprises a stirring box, a filtering box and a slag storage box, a stirring impeller is arranged in the stirring box in a matched mode, a filtering plate is arranged in the filtering box, a movable partition plate is arranged between the slag storage box and the filtering box, and a push plate is arranged at the position, located on the upper side of the filtering plate, in the filtering box; a first electric telescopic rod connected with the push plate is arranged on the filter box, and a sediment compression mechanism is arranged on the slag storage box. According to the device, sulfanilamide wastewater can be effectively separated and filtered, so that the filtering effect is improved, water in precipitates is drained by the pressing plate, and the precipitates are heated to be dried in an accelerated manner, so that the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of organic wastewater treatment, and in particular to a device and method for treating high-concentration sulfonamide wastewater. Background Art

[0002] Organic wastewater is wastewater mainly composed of organic pollutants. It can easily cause eutrophication of water quality and is quite harmful. It generally refers to domestic sewage, food processing, papermaking and other industrial wastewater, which contains organic substances such as carbohydrates, proteins, oils and lignin. These substances exist in the sewage in a suspended or dissolved state, and a device is needed to treat the wastewater.

[0003] The Chinese patent database discloses a treatment device for wastewater produced by solution polystyrene butadiene rubber, with publication number CN115304144A and publication date 20221108. The device comprises: a filtering mechanism, comprising a filtering barrel arranged in a horizontal state and a first supporting side plate and a second supporting side plate for supporting, a plurality of filter holes distributed at equal intervals are formed on the side wall of the filtering barrel, the filter holes can allow water to pass through but cannot allow floccules to pass through; a rotating drive mechanism arranged outside the filtering barrel and driving the filtering barrel to rotate; a separation component arranged inside the filtering barrel, the separation component can squeeze and dehydrate the floccules in the wastewater and separate and collect them, the separation component comprises an extrusion mechanism for separating the floccules and a screw feeder for conveying the floccules; a power mechanism arranged beside the second supporting side plate and providing power to the separation component; a drying mechanism arranged above the filtering barrel, the drying mechanism can perform initial drying of the floccules separated from the wastewater, so as to facilitate the subsequent squeezing and dehydration of the floccules by the extrusion mechanism.

[0004] The wastewater treatment device in the prior art has a relatively complex structure, and is difficult to collect and dehydrate the filtrate, and is therefore not suitable for use in the treatment of sulfonamide wastewater. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sulfonamide wastewater treatment device and method, so that the sulfonamide wastewater can be effectively separated and filtered and collected, thereby improving the filtering effect.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a sulfonamide wastewater treatment device, including a stirring box, a filter box and a slag storage box, the stirring box is in a closed cylindrical shape as a whole, and a stirring impeller is arranged in the stirring box, and a liquid inlet pipe and an exhaust valve are arranged through the top cover of the stirring box, and a liquid medicine box is also arranged on the top cover, and the outlet at the bottom end of the liquid medicine box is connected to the inner cavity of the stirring box; a motor is arranged at the bottom of the stirring box, and the motor is connected to the stirring impeller by transmission; a liquid outlet is arranged on the side of the stirring box, and the liquid outlet is connected to the top of the filter box through a first liquid outlet pipe, and the liquid outlet is connected to the top of the filter box through a first liquid outlet pipe. A support platform is provided in the middle position of the filter box, and a filter plate is provided on the support platform. The filter plate is provided with a plurality of filter holes, and a second liquid outlet pipe is provided on the side wall of the filter box and below the filter plate; a slag storage box is connected to the side wall of the filter box, and a movable partition is provided between the slag storage box and the filter box, and a push plate is provided on the upper side of the filter plate in the filter box, and a first electric telescopic rod connected to the push plate is provided on the filter box; when the partition is opened, the first electric telescopic rod can drive the push plate to push the sediment accumulated on the filter plate into the slag storage box, and a sediment compression mechanism is provided on the slag storage box.

[0007] A further improvement of the present invention is that the stirring impeller includes a rotating shaft, an outer fixed sleeve of the rotating shaft is provided with a shaft sleeve, a plurality of toggle plates and scrapers are provided on the outer periphery of the shaft sleeve, the toggle plates and scrapers are arranged at circumferential intervals, the outer periphery of the scraper matches the inner wall of the mixing box, a through opening is provided on the scraper, and a liquid flow gap is left between the outer edge of the toggle plate and the inner wall of the mixing box.

[0008] A further improvement of the present invention is that a sliding groove is provided on the side wall of the mixing box and above the liquid outlet, a sliding valve plate is provided inside the sliding groove, a push block is connected to the sliding valve plate, and when the push block pushes the sliding valve plate to move up and down, the sliding valve plate can just close or open the liquid outlet.

[0009] A further improvement of the present invention is that a slot is provided on the side wall of the filter box, the partition is plugged into the slot, and the partition is provided with a handle for plugging and unplugging the partition.

[0010] A further improvement of the present invention is that the sediment compression mechanism includes a support frame arranged outside the slag storage box, two groups of third electric telescopic rods are arranged on the support frame, the lower end of the third electric telescopic rod is connected to an upper pressure plate, a lower pressure plate is arranged in the slag storage box, the lower pressure plate is installed on the second electric telescopic rod, and the shapes of the upper and lower pressure plates match the slag storage box; a drain pipe is arranged on the side wall of one side of the slag storage box.

[0011] A further improvement of the present invention is that a heater is arranged on the side wall of one side of the slag storage box, a heat conducting pipe and a plurality of groups of heating wires are arranged on the bottom surface inside the slag storage box, and the heat conducting pipe and the heating wires are located below the lower pressure plate.

[0012] The above device can be used to treat sulfonamide wastewater, and the treatment method comprises the following steps: 1) The sulfonamide wastewater enters the mixing box from the liquid inlet pipe, and then the reagent is added into the liquid box and flows into the mixing box in proportion to the amount of water inlet. At the same time, the motor is started to drive the shaft to rotate the shaft sleeve, and the toggle plate stirs the wastewater inside the mixing box. In the process of mixing the reagent and the wastewater, the sulfonamide substance is flocculated into sediment. When the shaft sleeve rotates, it drives the scraper to scrape off the sediment adhering to the inner wall and bottom surface of the mixing box. The wastewater passes through the through opening, and the gas is discharged through the exhaust valve on the top cover. After sufficient stirring, the staff pulls the push block in the sliding groove upwards and drives the sliding valve plate to open the liquid outlet; 2) Wastewater and sediment are discharged from the first liquid outlet pipe, and the sediment is blocked on the filter plate through the filter holes on the filter plate. The wastewater gathers at the bottom of the filter box and is discharged from the second liquid outlet pipe; 3) When the sediment accumulates to a certain amount on the filter plate, the partition is opened, and the push plate is pushed by the first electric telescopic rod to push the sediment into the slag storage box. The third electric telescopic rod on the support frame moves downward and drives the upper pressing plate downward to squeeze the sediment, squeeze out the water in the sediment and discharge it from the drain pipe, and then the heater is operated to generate heat through the heat conduction pipe to heat the sediment on the lower pressing plate to dry it; 4) When the sediment is dry, the upper pressure plate is driven upward by the third electric telescopic rod to separate from the slag storage box, and then the lower pressure plate is pushed upward by the second electric telescopic rod to push the sediment upward out of the slag storage box. The lower pressure plate is cleaned and reset.

[0013] It can be seen from the above working process that the beneficial effects of the present invention are: the present invention can effectively separate and filter and collect sulfonamide wastewater, and it has the steps of stirring flocculation precipitation, filtration, compression, drying, etc., with a high degree of automation, and can be used to treat high-concentration sulfonamide wastewater to make it meet the emission standards. At the same time, the obtained filter cake has a small volume and a low water content, which is conducive to the later transportation, storage and further harmless treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the structure of a sulfonamide wastewater treatment device.

[0015] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0016] Figure 3 Schematic diagram of the internal structure of the mixing box.

[0017] Figure 4 Schematic diagram of the stirring impeller structure.

[0018] Figure 5 It is a schematic diagram of the filter box structure; Figure 6 This is a schematic diagram of the slag storage box structure.

[0019] In the figure: 1, mixing box; 2, top cover; 3, liquid inlet pipe; 4, liquid box; 5, exhaust valve; 6, motor; 7, rotating shaft; 8, bushing; 9, toggle plate; 10, scraper; 11, through opening; 12, liquid outlet; 13, sliding groove; 14, sliding valve plate; 15, push block; 16, first liquid outlet pipe; 17, filter box; 18, support platform; 19, filter plate; 20, filter hole; 21, second liquid outlet pipe; 22, first electric telescopic rod; 23, push plate; 24, slot; 25, partition; 26, handle; 27, slag storage box; 28, heater; 29, heat pipe; 30, heating wire; 31, second electric telescopic rod; 32, lower pressure plate; 33, support frame; 34, third electric telescopic rod; 35, upper pressure plate; 36, drain pipe. DETAILED DESCRIPTION

[0020] like Figure 1-6 , is a sulfonamide wastewater treatment device, and its structure mainly includes a stirring box 1, a filter box 17 and a slag storage box 27. The stirring box 1 is a closed cylindrical shape as a whole, and a stirring impeller is arranged in the stirring box 1. A liquid inlet pipe 3 and an exhaust valve 5 are arranged through the top cover 2 of the stirring box. A liquid box 4 is also arranged on the top cover 2, and the outlet at the bottom of the liquid box 4 is connected to the inner cavity of the stirring box 1; a motor 6 is arranged at the bottom of the stirring box 1, and the motor 6 is connected to the stirring impeller by transmission; a liquid outlet 12 is arranged on the side of the stirring box 1, and the liquid outlet 12 is connected to the top of the filter box 17 through a first liquid outlet pipe 16, and a support platform 18 is arranged in the middle position of the filter box 17, and the support platform A filter plate 19 is arranged on 18, and a plurality of filter holes 20 are arranged on the filter plate 19. A second liquid outlet pipe 21 is arranged on the side wall of the filter box 17 and below the filter plate 19; a slag storage box 27 is connected to the side wall of the filter box 17, and a movable partition 25 is arranged between the slag storage box 27 and the filter box 17. A push plate 23 is arranged on the upper side of the filter plate 19 in the filter box 17, and a first electric telescopic rod 22 connected to the push plate 23 is arranged on the filter box 17; when the partition 25 is opened, the first electric telescopic rod 22 can drive the push plate 23 to push the sediment accumulated on the filter plate 19 into the slag storage box 27, and a sediment compression mechanism is arranged on the slag storage box 27.

[0021] The stirring impeller includes a rotating shaft 7, an outer fixed sleeve of the rotating shaft 7 is provided with a shaft sleeve 8, a plurality of toggle plates 9 and scrapers 10 are provided on the outer periphery of the shaft sleeve 8, the toggle plates 9 and the scrapers 10 are arranged at intervals in the circumferential direction, the outer periphery of the scraper 10 matches the inner wall of the mixing box 1, a through opening 11 is provided on the scraper 10, and a liquid flow gap is left between the outer edge of the toggle plate 9 and the inner wall of the mixing box 1.

[0022] A sliding groove 13 is provided on the side wall of the mixing box 1 and above the liquid outlet 12. A sliding valve plate 14 is provided in the sliding groove 13. A push block 15 is connected to the sliding valve plate 14. When the push block 15 pushes the sliding valve plate 14 to move up and down, the sliding valve plate 14 can just close or open the liquid outlet 12.

[0023] A slot 24 is provided on the side wall of the filter box 17, and a partition 25 is inserted into the slot 24. The partition 25 is provided with a handle 26 for inserting and removing the partition.

[0024] The sediment compression mechanism includes a support frame 33 arranged on the outside of the slag storage box 27, two groups of third electric telescopic rods 34 are arranged on the support frame 33, the lower end of the third electric telescopic rod 34 is connected to an upper pressure plate 35, and a lower pressure plate 32 is arranged in the slag storage box 27, and the lower pressure plate 32 is installed on the second electric telescopic rod 31. The shapes of the upper pressure plate 35 and the lower pressure plate 32 match the slag storage box 27; a drainage pipe 36 is arranged on the side wall of one side of the slag storage box 27.

[0025] A heater 28 is provided on the side wall of one side of the slag storage box 27 , and a heat pipe 29 and a plurality of groups of heating wires 30 are provided on the bottom surface inside the slag storage box 27 . The heat pipe 29 and the heating wires 30 are located below the lower pressing plate 32 .

[0026] The above device can be used to treat sulfa wastewater, for example, sulfadiazine wastewater, and the treatment method includes the following steps: 1) The sulfonamide wastewater is introduced into the mixing box 1 from the liquid inlet pipe 3, and then the reagent is added into the liquid box 4 and flows into the mixing box 1 in proportion to the amount of water inlet. It is recommended to use polyaluminium chloride (PAC) and polyacrylamide (PAM) as the main coagulant and flocculant; at the same time, the motor 6 is started to make the shaft 7 drive the shaft sleeve 8 to rotate, and the toggle plate 9 stirs the wastewater in the mixing box 1. In the process of mixing the reagent and the wastewater, the sulfonamide substance is flocculated into a precipitate. When the shaft sleeve 8 rotates, it drives the scraper 10 to scrape off the precipitate adhering to the inner wall and the bottom surface of the mixing box 1. The wastewater passes through the through opening 11, and the gas is discharged through the exhaust valve 5 on the top cover 2. After sufficient stirring, the staff pulls the push block 15 in the sliding groove 13 upwards, and drives the sliding valve plate 14 to open the liquid outlet 12; 2) Wastewater and sediment are discharged from the first liquid outlet pipe 16, and the sediment is blocked on the filter plate 19 through the filter holes 20 on the filter plate 19. The wastewater gathers at the bottom of the filter box 17 and is discharged from the second liquid outlet pipe 21; 3) When the sediment accumulates to a certain amount on the filter plate 19, the partition 25 is opened, and the push plate 23 is pushed by the first electric telescopic rod 22 to push the sediment into the slag storage box 27, and the third electric telescopic rod 34 on the support frame 33 moves downward and drives the upper pressing plate 35 downward to squeeze the sediment, squeeze out the water in the sediment and discharge it from the drain pipe 36, and then the heater 28 is operated, and the electric heating wire 30 generates heat through the heat pipe 29, and the sediment on the lower pressing plate 32 is heated to dry it; 4) When the sediment is dry, the upper pressing plate 35 is driven upward by the third electric telescopic rod 34 to move away from the slag storage box 27, and then the lower pressing plate 32 is pushed upward by the second electric telescopic rod 31 to push the sediment upward out of the slag storage box 27, and the lower pressing plate 32 is cleaned and reset.

[0027] The invention introduces specific chemical treatment agents to efficiently precipitate and separate organic pollutants, suspended solids and possible heavy metal ions in sulfadiazine wastewater, and clarifies whether the wastewater can be discharged directly or needs further treatment. The treatment agents used are polyaluminium chloride (PAC) and polyacrylamide (PAM) as the main coagulants and flocculants. The main function of PAC is to form flocs of sulfadiazine and other dissolved organic matter by neutralizing the charge in the wastewater. PAM further promotes the aggregation and sedimentation of these flocs. In addition, iron salts or aluminium salts can be added according to the components in the wastewater to further enhance the precipitation effect.

[0028] After the above treatment, the main components of the precipitate produced include: sulfadiazine and its degradation products: Since the sulfadiazine molecule is relatively stable, its incompletely reacted molecules and degradation products will mainly exist in the form of solid precipitates.

[0029] Organic suspended matter: includes dissolved organic matter, by-products such as proteins and lipids, and other small amounts of pollutants.

[0030] Flocculant residues: mainly precipitates of PAC and PAM, which combine with organic matter in the wastewater through chemical reactions to form solid flocs.

[0031] Heavy metal ions: If the sulfadiazine wastewater contains heavy metals (such as catalyst residues from the production process), these metal ions will combine with the reagents during the treatment process to form precipitation.

[0032] Residues in wastewater After coagulation, sedimentation and filtration, the main residual substances in the wastewater include: Trace amounts of sulfadiazine residues: Although most sulfadiazine is removed by flocculation and precipitation, very small amounts of sulfadiazine residues may still be present in the wastewater and further testing is required to confirm their concentration.

[0033] Soluble organic matter: Although most of the organic matter is separated and precipitated, there may still be some small molecular organic matter that is difficult to flocculate.

[0034] Dissolved flocculant residues: During the flocculation process, some flocculants may not react completely and exist in dissolved form in the water.

[0035] Trace heavy metal ions: If sulfadiazine wastewater contains heavy metals, although most of them have been precipitated, a small amount will still remain in the water.

[0036] Wastewater can be further treated by activated carbon adsorption: If there is residual sulfadiazine or organic matter in the water, it can be further removed by activated carbon adsorption, especially to remove trace sulfadiazine and small molecular organic matter.

[0037] It can be seen from the above working process that the present invention can effectively separate and filter sulfonamide wastewater, and it has the steps of stirring flocculation precipitation, filtration, compression, drying, etc., with a high degree of automation, and can be used to treat high-concentration sulfonamide wastewater to make it meet the emission standards. At the same time, the obtained filter cake has a small volume and a low water content, which is conducive to the later transportation, storage and further harmless treatment.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A sulfonamide wastewater treatment device, comprising a stirring tank (1), a filter tank (17) and a slag storage tank (27), characterized in that: The stirring box (1) is in the shape of a closed cylinder as a whole. A stirring impeller is arranged in the stirring box (1). A liquid inlet pipe (3) and an exhaust valve (5) are arranged on the top cover (2) of the stirring box. A liquid medicine box (4) is also arranged on the top cover (2). The outlet at the bottom end of the liquid medicine box (4) is connected to the inner cavity of the stirring box (1). A motor (6) is arranged at the bottom of the stirring box (1). The motor (6) is connected to the stirring impeller in a transmission manner. A liquid outlet (12) is arranged on the side of the stirring box (1). The liquid outlet (12) is connected to the top of the filter box (17) through a first liquid outlet pipe (16). A support platform (18) is arranged in the middle of the filter box (17). A filter plate (19) is arranged on the support platform (18). A plurality of filter holes (20) are provided on the plate (19); a second liquid outlet pipe (21) is provided on the side wall of the filter box (17) and below the filter plate (19); a slag storage box (27) is connected to the side wall of the filter box (17); a movable partition (25) is provided between the slag storage box (27) and the filter box (17); a push plate (23) is provided on the upper side of the filter plate (19) in the filter box (17); a first electric telescopic rod (22) connected to the push plate (23) is provided on the filter box (17); when the partition (25) is opened, the first electric telescopic rod (22) can drive the push plate (23) to push the sediment accumulated on the filter plate (19) into the slag storage box (27); and a sediment compression mechanism is provided on the slag storage box (27).

2. A sulfonamide wastewater treatment device according to claim 1, characterized in that: The stirring impeller comprises a rotating shaft (7), an outer fixed sleeve of the rotating shaft (7) is provided with a shaft sleeve (8), a plurality of shifting plates (9) and scraping plates (10) are provided on the outer periphery of the shaft sleeve (8), the shifting plates (9) and scraping plates (10) are arranged at intervals in the circumferential direction, the outer periphery of the scraping plates (10) matches the inner wall of the stirring box (1), a through opening (11) is provided on the scraping plates (10), and a liquid flow gap is left between the outer edge of the shifting plates (9) and the inner wall of the stirring box (1).

3. A sulfonamide wastewater treatment device according to claim 1 or 2, characterized in that: A sliding groove (13) is provided on the side wall of the mixing box (1) and above the liquid outlet (12). A sliding valve plate (14) is provided in the sliding groove (13). A push block (15) is connected to the sliding valve plate (14). When the push block (15) pushes the sliding valve plate (14) to move up and down, the sliding valve plate (14) can just close or open the liquid outlet (12).

4. A sulfonamide wastewater treatment device according to claim 1 or 2, characterized in that: A slot (24) is provided on the side wall of the filter box (17), the partition (25) is inserted into the slot (24), and the partition (25) is provided with a handle (26) for plugging and unplugging the partition.

5. A sulfonamide wastewater treatment device according to claim 1 or 2, characterized in that: The sediment compression mechanism comprises a support frame (33) arranged outside the slag storage box (27), two sets of third electric telescopic rods (34) are arranged on the support frame (33), the lower ends of the third electric telescopic rods (34) are connected to upper pressing plates (35), a lower pressing plate (32) is arranged in the slag storage box (27), the lower pressing plate (32) is mounted on the second electric telescopic rod (31), and the shapes of the upper pressing plate (35) and the lower pressing plate (32) match the slag storage box (27); a liquid discharge pipe (36) is arranged on the side wall of one side of the slag storage box (27).

6. A sulfonamide wastewater treatment device according to claim 5, characterized in that: A heater (28) is provided on a side wall of one side of the slag storage box (27), and a heat conduction pipe (29) and a plurality of groups of electric heating wires (30) are provided on the bottom surface inside the slag storage box (27). The heat conduction pipe (29) and the electric heating wires (30) are located below the lower pressing plate (32).

7. A method for treating sulfonamide wastewater according to claim 6, characterized in that: The steps include: 1) The sulfonamide wastewater is introduced into the mixing box (1) through the liquid inlet pipe (3), and then the reagent is added into the liquid box (4) and flows into the mixing box (1) in proportion to the amount of water inlet. At the same time, the motor (6) is started to drive the shaft (7) to drive the shaft sleeve (8) to rotate, and the toggle plate (9) stirs the wastewater in the mixing box (1). In the process of mixing the reagent and the wastewater, the sulfonamide substance is flocculated into a precipitate. When the shaft sleeve (8) rotates, it drives the scraper (10) to scrape off the precipitate adhering to the inner wall and the bottom surface of the mixing box (1). The wastewater passes through the through opening (11), and the gas is discharged through the exhaust valve (5) on the top cover (2). After sufficient stirring, the staff pulls the push block (15) in the sliding groove (13) upwards, and drives the sliding valve plate (14) to open the liquid outlet (12); 2) the wastewater and the sediment are discharged from the first liquid outlet pipe (16), the sediment is blocked on the filter plate (19) through the filter holes (20) on the filter plate (19), and the wastewater is collected at the bottom of the filter box (17) and discharged from the second liquid outlet pipe (21); 3) When a certain amount of sediment accumulates on the filter plate (19), the partition (25) is opened, and the push plate (23) is pushed by the first electric telescopic rod (22) to push the sediment into the slag storage box (27), and the third electric telescopic rod (34) on the support frame (33) moves downward and drives the upper pressing plate (35) downward to squeeze the sediment, squeeze out the water in the sediment and discharge it from the drain pipe (36), and then the heater (28) is operated to generate heat through the heat conduction pipe (29) to heat the sediment on the lower pressing plate (32) to dry it; 4) When the sediment is dry, the upper pressing plate (35) is driven upward by the third electric telescopic rod (34) to move upward and away from the slag storage box (27), and then the lower pressing plate (32) is pushed upward by the second electric telescopic rod (31) to push the sediment upward out of the slag storage box (27), and the lower pressing plate (32) is cleaned and reset.

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