Explosive production wastewater pretreatment device

Abstract

The invention discloses an explosive production wastewater pretreatment device and relates to the technical field of wastewater treatment.The explosive production wastewater pretreatment device comprises a flotation tank and a control device, a partition plate is arranged in the flotation tank and divides the interior of the flotation tank into a reaction area and a flotation area, a partition block is arranged in the flotation tank, and the partition block and the inner surface of the side, away from the partition plate, of the flotation tank form a slag receiving area; the conveying mechanism is used for conveying wastewater and additives to the reaction area; the exhaust mechanism is used for discharging small bubbles into the flotation area; the scum scraping mechanism is used for discharging floating scum floating from the flotation area to the scum receiving area; and the cleaning mechanism is used for cleaning the scum attached to the scum scraping mechanism. Through the arrangement of the cleaning mechanism, after the scum scraping mechanism scrapes scum of the flotation area to the scum receiving area, the cleaning plate in the cleaning mechanism can automatically clean scum attached to the surface of the scum scraping soft plate in the scum scraping mechanism, and the scum attached to the surface of the scum scraping soft plate is prevented from entering the flotation area again; and the wastewater treatment effect of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a pretreatment device for explosives production wastewater. Background Technology

[0002] The production of explosives generates wastewater containing various harmful substances, such as heavy metal ions, nitro compounds, and emulsifiers. If this wastewater is discharged directly without effective treatment, it will cause serious pollution to the ecological environment, including soil and water bodies, and threaten the health and safety of nearby residents. Therefore, pre-treatment of explosives production wastewater to reduce pollutant concentration is a key prerequisite for subsequent in-depth treatment and compliance with emission standards.

[0003] Currently, most commercially available wastewater pretreatment devices for explosives production use processes such as air flotation to remove suspended solids and scum from the wastewater. In these devices, the scum scraping mechanism is a crucial component that scrapes and transports the scum generated in the flotation zone to the scum receiving zone. This typically involves a scraper plate contacting and propelling the scum. However, existing devices generally lack an effective cleaning mechanism. During the scraping process, a large amount of scum adheres to the surface of the scraper plate. When the scraper plate returns to the flotation zone after completing one scraping action, the scum adhering to the surface easily falls back into the flotation zone. This re-entering scum not only increases the risk of contamination but also... In addition to the workload of subsequent slag scraping, it also leads to the inability to effectively reduce the concentration of pollutants in wastewater. In some pretreatment sites for explosives production wastewater, the scum attached to the surface of the slag scraper repeatedly enters the flotation zone, causing the suspended solids content in the wastewater after the air flotation process to still exceed the standard. This affects subsequent chemical and biological treatment processes, resulting in low treatment efficiency of the entire wastewater treatment system and difficulty in meeting discharge standards for the effluent. Furthermore, frequent manual cleaning of the slag scraper not only consumes a lot of manpower and time, but may also further affect the wastewater treatment effect due to untimely cleaning or improper operation during the cleaning process. Therefore, it is urgent to improve this process. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a pretreatment device for explosive production wastewater, which aims to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wastewater pretreatment device for explosives production includes a flotation tank and a control device installed on the flotation tank. A partition is fixedly installed inside the flotation tank, dividing the tank into a reaction zone and a flotation zone. An arched plate is fixedly installed on the flotation tank. A partition block is fixedly installed inside the flotation tank, with one end of the partition block away from the flotation tank being sloped. The partition block and the inner surface of the side of the flotation tank away from the partition form a slag receiving area. A slag discharge port penetrating the sidewall of the flotation tank is provided inside the slag receiving area. The device also includes:

[0007] A conveying mechanism is installed on the flotation tank and electrically connected to the control device. The conveying mechanism is used to convey wastewater and additives to the reaction zone.

[0008] An exhaust mechanism, electrically connected to the control device, is used to discharge small air bubbles into the flotation zone.

[0009] A scum scraping mechanism is installed on the flotation tank and electrically connected to the control device. The scum scraping mechanism is used to discharge the scum floating on the flotation zone to the scum receiving zone.

[0010] A cleaning mechanism is installed on the flotation tank and is used to clean the scum adhering to the scum scraping mechanism.

[0011] Preferably, the conveying mechanism includes:

[0012] A support block is located within the reaction zone and is fixedly connected to the flotation cell;

[0013] A mixing pipe is fixedly installed on the support block, and multiple liquid outlets are equidistantly distributed on the surface of the mixing pipe. The liquid outlets are used to connect the interior of the mixing pipe and the reaction zone.

[0014] A liquid delivery unit is provided on the flotation cell, and the liquid delivery unit is used to deliver liquid into the mixing pipe.

[0015] Preferably, the liquid delivery unit includes:

[0016] The first liquid delivery pipe is fixedly installed on the flotation tank, and one end of the first liquid delivery pipe is connected to the interior of the mixing pipe, while the other end of the first liquid delivery pipe is connected to the wastewater discharge equipment.

[0017] The second liquid delivery pipe is fixedly installed on the flotation cell, with one end of the second liquid delivery pipe connected to the interior of the mixing pipe and the other end of the second liquid delivery pipe connected to the additive discharge device.

[0018] Preferably, the exhaust mechanism includes:

[0019] The first motor is fixedly mounted on the arch plate and electrically connected to the control device.

[0020] A drive shaft is rotatably mounted on the arch plate, and one end of the drive shaft near the first motor is fixedly connected to the output end of the first motor.

[0021] The drive gear is fixedly mounted on the end of the drive shaft away from the first motor;

[0022] A rotating part is disposed on the arch plate;

[0023] An air supply unit is installed on the flotation cell and electrically connected to the control device. The air supply unit is used to supply dissolved air water to the rotating part.

[0024] Preferably, the rotating part includes:

[0025] The longitudinal axis is rotatably mounted on the arch plate, and a water delivery channel is provided inside the longitudinal axis;

[0026] A driven gear is fixedly disposed at the end of the longitudinal axis away from the flotation area, and the driven gear meshes with the driving gear;

[0027] The exhaust branch pipe has multiple exhaust branch pipes, which are evenly arranged on the longitudinal axis. The interior of the exhaust branch pipe is connected to the water supply channel, and the surface of the exhaust branch pipe has multiple water outlets arranged at equal intervals.

[0028] Preferably, the air supply unit includes:

[0029] A support plate is fixedly installed on the flotation tank, and a pad is provided on the support plate;

[0030] A dissolved air device is installed on the pad and electrically connected to the control device. The dissolved air device is provided with an air delivery pipe that communicates with the water delivery channel. The dissolved air device is used to deliver saturated dissolved air water to the water delivery channel through the air delivery pipe.

[0031] The main drainage pipe is fixedly installed on the flotation tank and connected to the flotation zone. The main drainage pipe is used to discharge the clear water below the flotation zone. A first branch pipe is fixedly installed on the main drainage pipe. The first branch pipe is used to discharge the clear water in the main drainage pipe to external equipment. A second branch pipe connected to the dissolved air device is also installed on the main drainage pipe.

[0032] Preferably, the slag scraping mechanism includes:

[0033] The device has two rotating rollers, and the ends of the two rotating rollers are rotatably connected to the flotation cell respectively.

[0034] A transmission belt is fitted onto two rotating rollers, and multiple equidistant scraper plates are fixedly installed on the transmission belt.

[0035] The second motor is fixedly installed on the flotation cell and electrically connected to the control device, and the output end of the second motor is fixedly connected to the end of any rotating roller.

[0036] Preferably, the cleaning mechanism includes:

[0037] A fixing plate is located in the slag receiving area, and there are two fixing plates. The two fixing plates are symmetrically arranged on the inner wall of the flotation tank. Inclined grooves are opened on the surfaces of the two fixing plates on opposite sides. A reset spring is fixedly installed in the inclined groove, and the reset spring is always in a compressed state.

[0038] A sliding block is slidably disposed in the inclined groove, and the surface of the sliding block near the ball is in contact with the ball, and the surface of the sliding block near the return spring abuts against the return spring;

[0039] The cleaning plate is located between the two fixed plates, and both ends of the cleaning plate are fixedly connected to the sliding blocks on the adjacent sides.

[0040] Preferably, the inclined groove has two sets of ball grooves, and the ball grooves are provided with rolling balls.

[0041] Preferably, an inclined block is fixedly installed in the slag receiving area, and the inclined block is used to discharge the floating slag that enters the slag receiving area through the slag discharge port.

[0042] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0043] 1. This device is equipped with a cleaning mechanism, which allows the cleaning plate in the cleaning mechanism to automatically clean the scum adhering to the surface of the scraping plate after the scraping mechanism scrapes the scum in the flotation zone to the scum receiving zone. This prevents the scum adhering to the surface of the scraping plate from re-entering the flotation zone, thereby greatly improving the wastewater treatment effect of this device.

[0044] 2. This device is equipped with a rotating part, which allows the exhaust branch pipe to rotate around the longitudinal axis while releasing saturated dissolved air water into the flotation zone. This allows the saturated dissolved air water released by the exhaust branch pipe to be more evenly dispersed in the lower layer of the mixed liquor in the flotation zone, and in turn, allows the microbubbles released by the saturated dissolved air water to be more evenly dispersed in the mixture of wastewater and additives, thereby improving the effect of bringing the scum to the surface of the mixed liquor. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A three-dimensional structural schematic diagram of a wastewater pretreatment device for explosives production is shown.

[0047] Figure 2 A front view of a wastewater pretreatment device for explosives production is shown.

[0048] Figure 3 It shows Figure 2 Sectional view of AA.

[0049] Figure 4 A side view of a wastewater pretreatment device for explosives production is shown.

[0050] Figure 5 It shows Figure 4 A cross-sectional view of BB.

[0051] Figure 6 A top view of a wastewater pretreatment device for explosives production is shown.

[0052] Figure 7 It shows Figure 2 A sectional view of CC.

[0053] Figure 8 An exploded view of the cleaning facility is shown.

[0054] Legend:

[0055] 1. Flotation cell; 2. Control device; 3. Baffle; 4. Reaction zone; 5. Flotation zone; 6. Arch plate; 7. Partition block; 8. Slag receiving area; 9. Slag discharge port; 10. Support block; 11. Mixing pipe; 12. Liquid outlet; 13. First liquid delivery pipe; 14. Second liquid delivery pipe; 15. First motor; 16. Drive shaft; 17. Drive gear; 18. Longitudinal shaft; 19. Water delivery pipe; 20. Driven gear; 21. Exhaust support 21. Pipe; 22. Outlet; 23. Support plate; 24. Pad block; 25. Dissolved air device; 26. Air supply pipe; 27. Main drainage pipe; 28. First branch pipe; 29. ​​Second branch pipe; 30. Rotating roller; 31. Drive belt; 32. Sludge scraper plate; 33. Second motor; 34. Fixed plate; 35. Inclined groove; 36. Return spring; 37. Ball groove; 38. Ball bearing; 39. Sliding block; 40. Cleaning plate; 41. Inclined block. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] Reference Figures 1 to 8 The following is a further description of an embodiment of the wastewater pretreatment device for explosive production according to the present invention.

[0061] A wastewater pretreatment device for explosives production includes a flotation tank 1 and a control device 2 installed on the flotation tank 1. A partition 3 is fixedly installed inside the flotation tank 1, dividing the interior of the flotation tank 1 into a reaction zone 4 and a flotation zone 5. An arch plate 6 is fixedly installed on the flotation tank 1. A partition block 7 is fixedly installed inside the flotation tank 1, with one end of the partition block 7 away from the flotation tank 1 set as an inclined surface. This design allows the liquid level of the mixed liquor in the flotation tank 1 to partially exceed the partition block 7, thus biasing it towards the subsequent scraping of scum onto the inclined surface of the partition block 7, and then scraping the scum on the inclined surface to the scum receiving zone 8. The partition block 7 and the inner surface of the side of the flotation tank 1 away from the partition 3 form the scum receiving zone 8. A scum discharge port 9 penetrating the side wall of the flotation tank 1 is opened inside the scum receiving zone 8. An inclined block 41 is fixedly installed inside the scum receiving zone 8, used to discharge the scum entering the scum receiving zone 8 through the scum discharge port 9. The device also includes:

[0062] A conveying mechanism, installed on the flotation tank 1 and electrically connected to the control device 2, is used to convey wastewater and additives to the reaction zone 4. The conveying mechanism includes:

[0063] Support block 10 is located in reaction zone 4 and is fixedly connected to flotation cell 1;

[0064] The mixing pipe 11 is fixedly installed on the support block 10, and the surface of the mixing pipe 11 has multiple equally spaced liquid outlets 12, which are used to connect the interior of the mixing pipe 11 and the reaction zone 4. It should be noted that by setting up the mixing pipe 11, the wastewater and additives can collide with each other in the mixing pipe, thereby improving the mixing effect of the wastewater and additives, and thus improving the effect of subsequent scum precipitation from the wastewater.

[0065] The liquid delivery unit, installed on the flotation cell 1, is used to deliver liquid into the mixing pipe 11. The liquid delivery unit includes:

[0066] The first liquid delivery pipe 13 is fixedly installed on the flotation tank 1, and one end of the first liquid delivery pipe 13 is connected to the interior of the mixing pipe 11, and the other end of the first liquid delivery pipe 13 is connected to the wastewater discharge equipment.

[0067] The second liquid delivery pipe 14 is fixedly installed on the flotation tank 1, and one end of the second liquid delivery pipe 14 is connected to the interior of the mixing pipe 11, and the other end of the second liquid delivery pipe 14 is connected to the additive discharge device. The additive is a mixture of coagulant aid and flocculant.

[0068] During operation, the external wastewater discharge equipment sends wastewater to the mixing pipe 11 through the first liquid delivery pipe 13, while the additive discharge equipment also sends additives to the mixing pipe 11 through the second liquid delivery pipe 14. The wastewater and additives delivered to the mixing pipe 11 are mixed by impact in the mixing pipe 11 and then discharged through the outlet 12 on the mixing pipe 11 into the reaction zone 4. As the mixing pipe 11 continuously discharges the mixture of wastewater and additives into the reaction zone 4, the liquid level in the reaction zone 4 gradually rises until the liquid level of the mixture of wastewater and additives in the reaction zone 4 exceeds the partition 3 and enters the flotation zone 5. As the liquid level of the mixture in the flotation zone 5 gradually rises until the liquid level of the mixture exceeds the scraper plate 32 near the side of the flotation zone 5 by a certain depth (this depth value is set by the operator based on experience), the exhaust mechanism and the scraper mechanism are started by the control device 2.

[0069] The venting mechanism, electrically connected to the control device 2, is used to discharge small air bubbles into the flotation zone 5. The venting mechanism includes:

[0070] The first motor 15 is fixedly mounted on the arch plate 6 and electrically connected to the control device 2;

[0071] The drive shaft 16 is rotatably mounted on the arch plate 6, and one end of the drive shaft 16 near the first motor 15 is fixedly connected to the output end of the first motor 15.

[0072] The drive gear 17 is fixedly mounted on the end of the drive shaft 16 away from the first motor 15;

[0073] A rotating part, disposed on the arch plate 6, includes:

[0074] The longitudinal axis 18 is rotatably mounted on the arch plate 6, and a water delivery channel is provided inside the longitudinal axis 18;

[0075] Driven gear 20 is fixedly disposed at one end of the longitudinal shaft 18 away from the flotation zone 5, and driven gear 20 meshes with driving gear 17;

[0076] There are multiple exhaust branch pipes 21, and the multiple exhaust branch pipes 21 are evenly arranged on the longitudinal axis 18. The interior of the exhaust branch pipe 21 is connected to the water supply channel, and multiple water outlets 22 are opened on the surface of the exhaust branch pipe 21 at equal intervals.

[0077] While the exhaust branch pipe 21 discharges saturated dissolved air water into the flotation zone 5, the control device 2 controls the first motor 15 to start, thereby causing the drive shaft 16, which is fixedly connected to the output end of the first motor 15, to rotate. This causes the drive gear 17, which is fixedly connected to the drive shaft 16, to rotate. Through the meshing between the drive gear 17 and the driven gear 20, the longitudinal shaft 18, which is fixedly connected to the driven gear 20, is driven to rotate. This causes the exhaust branch pipe 21, which is mounted on the longitudinal shaft 18, to rotate around the axis of the longitudinal shaft 18. Thus, the exhaust branch pipe 21 rotates around the axis of the longitudinal shaft 18 while releasing saturated dissolved air water into the flotation zone 5.

[0078] This device is equipped with a rotating part, which allows the exhaust branch pipe 21 to rotate around the axis of the longitudinal axis 18 while releasing saturated dissolved air water into the flotation zone 5. This allows the saturated dissolved air water released by the exhaust branch pipe to be more evenly dispersed in the lower layer of the mixed liquor in the flotation zone 5, and further allows the microbubbles released by the saturated dissolved air water to be more evenly dispersed in the mixture of wastewater and additives, thereby improving the effect of bringing the scum to the surface of the mixed liquor.

[0079] An air supply unit, installed on the flotation cell 1 and electrically connected to the control device 2, is used to supply dissolved air water to the rotating section. The air supply unit includes:

[0080] Support plate 23 is fixedly installed on flotation tank 1, and pad block 24 is provided on support plate 23;

[0081] The dissolved air device 25 is mounted on the pad 24 and electrically connected to the control device 2. The dissolved air device 25 is equipped with an air delivery pipe 26 that communicates with the water delivery channel. The dissolved air device 25 is used to deliver saturated dissolved air water to the water delivery channel through the air delivery pipe 26.

[0082] The main drainage pipe 27 is fixedly installed on the flotation tank 1 and connected to the flotation zone 5. The main drainage pipe 27 is used to discharge the clear water below the flotation zone 5. By controlling the drainage speed of the main drainage pipe 27, the liquid level of the mixed liquor in the flotation zone 5 is always lower than the height of the partition 3 and the height of the partition block 7, and the liquid level of the mixed liquor in the flotation zone 5 is submerged in part of the scraper plate 32, so that the scraper plate 32 can scrape the scum floating on the liquid level of the mixed liquor to the scum receiving area 8. A first branch pipe 28 is fixedly installed on the main drainage pipe 27. The first branch pipe 28 is used to discharge the clear water in the main drainage pipe 27 to the external equipment. A second branch pipe 29 connected to the dissolved air device 25 is also installed on the main drainage pipe 27.

[0083] The activation of the venting mechanism causes it to continuously discharge small bubbles into the flotation zone 5. The specific process is as follows: the dissolved air device 25 of the control device 2 is activated, so that the container device delivers saturated dissolved air water to the water delivery channel in the longitudinal axis 18 through the air delivery pipe 26. The saturated dissolved air water in the water delivery pipe 19 enters each venting branch pipe 21, and the saturated dissolved air water in the venting branch pipe 21 is discharged to the flotation zone 5 through the water outlet 22 on the venting branch pipe 21. The saturated dissolved air water entering the flotation zone 5 depressurizes the mixture of wastewater and additives in the flotation zone 5 and releases microbubbles. The microbubbles float upward to the water surface under the action of buoyancy. During the upward floating process, the microbubbles are adsorbed on the surface of the scum precipitated in the mixture of wastewater and additives, thereby driving the scum to float upward until the scum floats above the mixture of wastewater and additives. Through the action of the venting mechanism, the mixture of wastewater and additives is separated into layers (the upper layer is scum and the lower layer is clear water).

[0084] It should be noted that by setting up an exhaust mechanism, this device can continuously discharge saturated dissolved air water into the mixture of wastewater and additives in the flotation tank 1. The microbubbles discharged by the dissolved air water entering the flotation zone 5 carry the precipitated scum to the liquid surface, which facilitates the subsequent scum scraping mechanism to clean the scum on the liquid surface.

[0085] The scum scraping mechanism is installed on the flotation tank 1 and electrically connected to the control device 2. The scum scraping mechanism is used to discharge the scum floating on the flotation zone 5 to the scum receiving zone 8. The scum scraping mechanism includes:

[0086] There are two rotating rollers 30, and the ends of the two rotating rollers 30 are respectively rotatably connected to the flotation cell 1;

[0087] A transmission belt 31 is fitted onto two rotating rollers 30, and multiple equidistant scraper plates 32 are fixedly installed on the transmission belt 31.

[0088] The second motor 33 is fixedly installed on the flotation cell 1 and electrically connected to the control device 2. The output end of the second motor 33 is fixedly connected to the end of any rotating roller 30.

[0089] The activation of the scum scraping mechanism scrapes the scum floating above the surface of the mixed liquid toward the scum receiving area 8. Specifically, the control device 2 controls the second motor 33 to start, thereby causing the rotating roller 30, which is fixedly connected to the output end of the second motor 33, to rotate. Through the pulley transmission between the transmission belt 31 and the rotating roller 30, the other rotating roller 30 is driven to rotate synchronously. The rotation of the transmission belt 31 causes the scum scraping soft plate 32 set on the transmission belt 31 to move with the transmission belt 31. When the scum scraping soft plate 32 partially extends into the mixed liquid in the flotation area 5, the scum scraping soft plate 32 drives the scum floating above the mixed liquid to move toward the scum receiving area 8. Through the cooperation between the scum scraping soft plate 32 and the partition block 7, the scum is scraped into the scum receiving area 8.

[0090] It should be noted that this device is equipped with a scum scraping mechanism, which enables it to automatically scrape the scum in the flotation zone 5 to the scum receiving zone 8, thereby cleaning the floating scum in the flotation zone 5 in a timely manner and improving the wastewater treatment efficiency and effect of the device to a certain extent.

[0091] A cleaning mechanism, installed on flotation tank 1, is used to remove scum adhering to the scum scraping mechanism. The cleaning mechanism includes:

[0092] Fixed plates 34 are located in the slag receiving area 8, and there are two fixed plates 34. The two fixed plates 34 are symmetrically arranged on the inner wall of the flotation tank 1. Inclined grooves 35 are opened on the opposite sides of the two fixed plates 34. A return spring 36 is fixedly installed in the inclined groove 35. By setting the return spring 36, the cleaning plate 40 can be reset after the scraper plate 32 passes over it, and the return spring 36 is always in a compressed state. This arrangement allows the sliding block 39 to abut against the end of the inclined groove 35 near the transmission belt 31 when it is not in contact with the scraper plate 32. Two sets of ball grooves 37 are opened in the inclined groove 35. Balls 38 are rolled in the ball grooves 37. It should be noted that by setting the ball 38, the smoothness of the sliding block 39 in the inclined groove 35 is greatly improved, so that the sliding block 39 can slide in the inclined groove 35.

[0093] The sliding block 39 is slidably disposed in the inclined groove 35, and the surface of the sliding block 39 near the ball 38 is in contact with the ball 38, and the surface of the sliding block 39 near the return spring 36 is in contact with the return spring 36.

[0094] The cleaning plate 40 is located between the two fixed plates 34, and both ends of the cleaning plate 40 are fixedly connected to the sliding blocks 39 on the adjacent sides.

[0095] After the scraper plate 32 scrapes the scum in the flotation zone 5 toward the receiving zone 8, the scraper plate 32 continues to move, causing it to come into contact with the cleaning plate 40 and apply a horizontal force to it. This, in turn, causes the cleaning plate 40 to apply a horizontal force to the sliding block 39, which in turn slides within the inclined groove 35 and simultaneously compresses the return spring 36. The movement of the sliding block 39 also drives the cleaning plate 40, which is fixedly connected to it, to move. As the cleaning plate 40 moves with the scraper plate 32, it also slides on the surface of the scraper plate 32 until it slides away from the end of the scraper plate 32 away from the drive belt 31. At this point, the scraper plate 32 that was in contact with the cleaning plate 40 passes over it. At the same time, the return spring 36 releases its elastic potential energy, pushing the sliding block 39 to return to its original position. This allows the cleaning plate 40, which is fixedly connected to the sliding block 39, to return to its original position, thus preparing for the next movement on the surface of the scraper plate 32.

[0096] This device is equipped with a cleaning mechanism, which allows the cleaning plate 40 in the cleaning mechanism to automatically clean the scum adhering to the surface of the scraping plate 32 after the scraping mechanism scrapes the scum from the flotation zone 5 to the scum receiving zone 8. This prevents the scum adhering to the surface of the scraping plate 32 from re-entering the flotation zone 5, thereby greatly improving the wastewater treatment effect of this device.

[0097] Working principle: During operation, the external wastewater discharge equipment sends wastewater to the mixing pipe 11 through the first liquid delivery pipe 13, and at the same time, the additive discharge equipment also sends additive to the mixing pipe 11 through the second liquid delivery pipe 14. The wastewater and additive delivered to the mixing pipe 11 are mixed by impact in the mixing pipe 11 and then discharged through the liquid outlet 12 on the mixing pipe 11 into the reaction zone 4. As the mixing pipe 11 continuously discharges the mixture of wastewater and additive into the reaction zone 4, the liquid level in the reaction zone 4 gradually rises until the liquid level of the mixture of wastewater and additive in the reaction zone 4 exceeds the partition 3 and enters the flotation zone 5. As the liquid level of the mixture in the flotation zone 5 gradually rises until the liquid level of the mixture exceeds the scraper plate 32 near the side of the flotation zone 5 by a certain depth (this depth value is set by the operator based on experience), the exhaust mechanism and the scraper mechanism are started by the control device 2.

[0098] The activation of the venting mechanism causes it to continuously discharge small bubbles into the flotation zone 5. The specific process is as follows: the dissolved air device 25 of the control device 2 is activated, so that the container device delivers saturated dissolved air water to the water delivery channel in the longitudinal axis 18 through the air delivery pipe 26. The saturated dissolved air water in the water delivery pipe 19 enters each venting branch pipe 21, and the saturated dissolved air water in the venting branch pipe 21 is discharged to the flotation zone 5 through the water outlet 22 on the venting branch pipe 21. The saturated dissolved air water entering the flotation zone 5 depressurizes the mixture of wastewater and additives in the flotation zone 5 and releases microbubbles. The microbubbles float upward to the water surface under the action of buoyancy. During the upward floating process, the microbubbles are adsorbed on the surface of the scum precipitated in the mixture of wastewater and additives, thereby driving the scum to float upward until the scum floats above the mixture of wastewater and additives. Through the action of the venting mechanism, the mixture of wastewater and additives is separated into layers (the upper layer is scum and the lower layer is clear water).

[0099] While the exhaust branch pipe 21 discharges saturated dissolved air water into the flotation zone 5, the control device 2 controls the first motor 15 to start, thereby causing the drive shaft 16, which is fixedly connected to the output end of the first motor 15, to rotate. This causes the drive gear 17, which is fixedly connected to the drive shaft 16, to rotate. Through the meshing between the drive gear 17 and the driven gear 20, the longitudinal shaft 18, which is fixedly connected to the driven gear 20, is driven to rotate. This causes the exhaust branch pipe 21, which is mounted on the longitudinal shaft 18, to rotate around the axis of the longitudinal shaft 18. Thus, the exhaust branch pipe 21 rotates around the axis of the longitudinal shaft 18 while releasing saturated dissolved air water into the flotation zone 5.

[0100] The activation of the scum scraping mechanism scrapes the scum floating above the surface of the mixed liquid toward the scum receiving area 8. Specifically, the control device 2 controls the second motor 33 to start, thereby causing the rotating roller 30, which is fixedly connected to the output end of the second motor 33, to rotate. Through the pulley transmission between the transmission belt 31 and the rotating roller 30, the other rotating roller 30 is driven to rotate synchronously. The rotation of the transmission belt 31 causes the scum scraping soft plate 32 set on the transmission belt 31 to move with the transmission belt 31. When the scum scraping soft plate 32 partially extends into the mixed liquid in the flotation area 5, the scum scraping soft plate 32 drives the scum floating above the mixed liquid to move toward the scum receiving area 8. Through the cooperation between the scum scraping soft plate 32 and the partition block 7, the scum is scraped into the scum receiving area 8.

[0101] After the scraper plate 32 scrapes the scum in the flotation zone 5 towards the receiving zone 8, the scraper plate 32 continues to move, causing it to come into contact with the cleaning plate 40 and apply a horizontal force to it. This, in turn, causes the cleaning plate 40 to apply a horizontal force to the sliding block 39, which slides within the inclined groove 35 and simultaneously compresses the return spring 36. The movement of the sliding block 39 also drives the cleaning plate 40, which is fixedly connected to it, to move. As the cleaning plate 40 moves with the scraper plate 32, it slides on the surface of the scraper plate 32 until it slides away from the end of the scraper plate 32 away from the drive belt 31. At this point, the scraper plate 32, which was in contact with the cleaning plate 40, passes over the cleaning plate 40. Simultaneously, the return spring 36 releases its elastic potential energy, pushing the sliding block 39 to reset, thus resetting the cleaning plate 40, which is fixedly connected to the sliding block 39, and preparing for the next movement on the surface of the scraper plate 32.

[0102] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pretreatment device for wastewater from explosives production, comprising a flotation tank (1) and a control device (2) disposed on the flotation tank (1), wherein a partition (3) is fixedly disposed inside the flotation tank (1), the partition (3) dividing the interior of the flotation tank (1) into a reaction zone (4) and a flotation zone (5), characterized in that, An arch plate (6) is fixedly installed on the flotation tank (1), and a partition block (7) is fixedly installed inside the flotation tank (1). The end of the partition block (7) away from the flotation tank (1) is set as an inclined surface, and the inner surface of the partition block (7) and the side of the flotation tank (1) away from the partition plate (3) forms a slag receiving area (8). A slag discharge port (9) penetrating the side wall of the flotation tank (1) is opened inside the slag receiving area (8), and it also includes: A conveying mechanism is installed on the flotation tank (1) and electrically connected to the control device (2). The conveying mechanism is used to convey wastewater and additives to the reaction zone (4). The exhaust mechanism is electrically connected to the control device (2) and is used to discharge small bubbles into the flotation zone (5); The slag scraping mechanism is installed on the flotation tank (1) and electrically connected to the control device (2). The slag scraping mechanism is used to discharge the slag floating on the flotation zone (5) to the slag receiving zone (8). A cleaning mechanism is installed on the flotation tank (1) and is used to clean the scum attached to the scum scraping mechanism.

2. The wastewater pretreatment device for explosives production according to claim 1, characterized in that, The conveying mechanism includes: A support block (10) is located in the reaction zone (4) and is fixedly connected to the flotation cell (1); A mixing pipe (11) is fixedly installed on the support block (10), and a plurality of equally spaced liquid outlets (12) are provided on the surface of the mixing pipe (11). The liquid outlets (12) are used to connect the interior of the mixing pipe (11) and the reaction zone (4). A liquid delivery unit is provided on the flotation tank (1) and is used to deliver liquid into the mixing pipe (11).

3. The wastewater pretreatment device for explosives production according to claim 2, characterized in that, The liquid delivery part includes: The first liquid delivery pipe (13) is fixedly installed on the flotation tank (1), and one end of the first liquid delivery pipe (13) is connected to the interior of the mixing pipe (11), and the other end of the first liquid delivery pipe (13) is connected to the wastewater discharge equipment. The second liquid delivery pipe (14) is fixedly installed on the flotation tank (1), and one end of the second liquid delivery pipe (14) is connected to the interior of the mixing pipe (11), and the other end of the second liquid delivery pipe (14) is connected to the additive discharge device.

4. The wastewater pretreatment device for explosives production according to claim 3, characterized in that, The exhaust mechanism includes: The first motor (15) is fixedly mounted on the arch plate (6) and electrically connected to the control device (2); A drive shaft (16) is rotatably mounted on the arch plate (6), and one end of the drive shaft (16) near the first motor (15) is fixedly connected to the output end of the first motor (15); The drive gear (17) is fixedly disposed at the end of the drive shaft (16) away from the first motor (15); A rotating part is disposed on the arch plate (6); An air supply unit is installed on the flotation cell (1) and electrically connected to the control device (2). The air supply unit is used to supply dissolved air water to the rotating part.

5. The wastewater pretreatment device for explosives production according to claim 4, characterized in that, The rotating part includes: The longitudinal shaft (18) is rotatably mounted on the arch plate (6), and a water delivery channel is provided inside the longitudinal shaft (18); A driven gear (20) is fixedly disposed at one end of the longitudinal shaft (18) away from the flotation zone (5), and the driven gear (20) meshes with the driving gear (17); The exhaust branch pipe (21) has multiple outlets (22) evenly arranged on the longitudinal axis (18). The interior of the exhaust branch pipe (21) is connected to the water supply channel, and the surface of the exhaust branch pipe (21) has multiple outlets (22) arranged at equal intervals.

6. The wastewater pretreatment device for explosives production according to claim 5, characterized in that, The air supply unit includes: A support plate (23) is fixedly installed on the flotation tank (1), and a pad (24) is provided on the support plate (23); A dissolved air device (25) is installed on the pad (24) and electrically connected to the control device (2). The dissolved air device (25) is provided with an air delivery pipe (26) that communicates with the water delivery channel. The dissolved air device (25) is used to deliver saturated dissolved air water to the water delivery channel through the air delivery pipe (26). The main drain pipe (27) is fixedly installed on the flotation tank (1) and connected to the flotation zone (5). The main drain pipe (27) is used to discharge the clear water below the flotation zone (5). A first branch pipe (28) is fixedly installed on the main drain pipe (27). The first branch pipe (28) is used to discharge the clear water in the main drain pipe (27) to the external equipment. A second branch pipe (29) connected to the dissolved air device (25) is also installed on the main drain pipe (27).

7. The wastewater pretreatment device for explosives production according to claim 6, characterized in that, The slag scraping mechanism includes: Two rotating rollers (30) are provided, and the ends of the two rotating rollers (30) are respectively rotatably connected to the flotation cell (1); A transmission belt (31) is sleeved on two rotating rollers (30), and a plurality of equidistant scraper plates (32) are fixedly arranged on the transmission belt (31); The second motor (33) is fixedly installed on the flotation cell (1) and electrically connected to the control device (2), and the output end of the second motor (33) is fixedly connected to the end of any rotating roller (30).

8. The wastewater pretreatment device for explosives production according to claim 7, characterized in that, The cleaning facility includes: A fixing plate (34) is located in the slag receiving area (8), and there are two fixing plates (34). The two fixing plates (34) are symmetrically arranged on the inner wall of the flotation tank (1). Inclined grooves (35) are opened on the surfaces of the two fixing plates (34) on opposite sides. A reset spring (36) is fixedly installed in the inclined groove (35), and the reset spring (36) is always in a compressed state. The sliding block (39) is slidably disposed in the inclined groove (35), and the surface of the sliding block (39) near the ball (38) is in contact with the ball (38), and the surface of the sliding block (39) near the return spring (36) abuts against the return spring (36); The cleaning plate (40) is located between the two fixed plates (34), and the two ends of the cleaning plate (40) are fixedly connected to the sliding blocks (39) on the adjacent sides respectively.

9. The wastewater pretreatment device for explosives production according to claim 8, characterized in that, Two sets of ball grooves (37) are provided in the inclined groove (35), and the ball grooves (37) are provided with rolling balls (38).

10. The wastewater pretreatment device for explosives production according to claim 9, characterized in that, An inclined block (41) is fixedly installed in the slag receiving area (8). The inclined block (41) is used to discharge the floating slag that enters the slag receiving area (8) through the slag discharge port (9).

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