A kind of leather auxiliary production wastewater treatment equipment

Abstract

The utility model discloses a kind of wastewater treatment equipment for leather auxiliary production, including body, the body is provided with water inlet hopper and overflow, the body is symmetrically rotationally arranged with two groups of bubble plate, the bubble plate adopts hollow structure, bubble plate is provided with several air holes in it, the body is fixed with air pump outside, air pump is connected with two groups of bubble plate by gas pipeline, the body is respectively arranged with the slag scraping unit and the slag removal unit that are interconnected in upper and lower. The utility model is driven under the air pump to form a large number of micro-bubbles by setting hollow structure and the bubble plate with air hole, and the organic suspended particles in wastewater are combined to form dross and float, the dross is guided into slag removal unit in time by slag scraping unit, and the flotation separation efficiency is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology in leather auxiliary agent production, and specifically to a wastewater treatment device for leather auxiliary agent production. Background Technology

[0002] In the field of artificial leather crosslinking agent (leather auxiliary agent) production, this auxiliary agent is widely used because of its efficient crosslinking and curing performance in water-based resins. This allows the finished products to have excellent physical and chemical properties such as wet friction resistance, dry abrasion resistance, and water washing resistance without the need for long-term storage or complex drying processes.

[0003] However, the production process, especially in the mixing and blending of waterborne polyurethane resins, waterborne color pastes, and waterborne additives, generates very little organic waste gas, but inevitably produces a certain amount of wastewater, mainly from the cleaning of mixing equipment. This wastewater is rich in organic matter such as waterborne polyurethane resins, crosslinking agents, and additives; direct discharge would severely damage aquatic ecosystems. These organic substances are hydrophobic and form suspended particles in water. Currently, the primary pretreatment method for wastewater from leather additive production is the removal of organic particles formed from these organic substances.

[0004] Therefore, there is an urgent need to design a wastewater treatment device specifically for leather auxiliary production wastewater that can effectively remove organic particles in the pretreatment stage, in order to meet increasingly stringent environmental protection requirements and the actual needs of production wastewater discharge. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater treatment device for leather auxiliaries production. This wastewater treatment device can pre-remove most of the organic suspended particles in the wastewater generated during the leather auxiliaries production process, thereby improving the wastewater treatment effect and reducing environmental pollution.

[0006] The technical solution adopted by this utility model to solve the above problems is: a wastewater treatment device for leather auxiliary production, including a machine body, wherein the machine body is provided with a water inlet and an overflow outlet, and two sets of bubble plates are symmetrically rotated inside the machine body. The bubble plates adopt a hollow structure and have a number of air holes that communicate with the inside of the bubble plates. An air pump is fixedly installed outside the machine body and is connected to the two sets of bubble plates through a gas pipeline. A slag scraping unit and a slag discharge unit that are interconnected are respectively arranged at the top and bottom of the machine body.

[0007] Preferably, the slag scraping unit includes a slag scraping cylinder, a slag collecting cylinder, and a slag conveying pipe. The slag scraping cylinder is located above the machine body. The slag collecting cylinder is rotatably located inside the slag scraping cylinder and is equipped with a slag scraping drive motor that drives its rotation. A slag scraping arm is provided on the outer periphery of the slag collecting cylinder and communicates with its interior. The end of the slag scraping arm away from the slag collecting cylinder is adapted to the inner wall of the slag scraping cylinder. The slag conveying pipe is vertically fixed inside the machine body, and its upper end is rotatably connected to the bottom of the slag collecting cylinder. The bubble plate has a notch that matches the contour of the outer surface of the slag conveying pipe. The slag conveying pipe passes through the notches of the two sets of bubble plates, and its lower end is connected to the slag discharge unit.

[0008] Preferably, the scraper arm is curved and has a U-shaped cross-section design, and several sets of guide plates are arranged obliquely inside the groove of the scraper arm.

[0009] Preferably, the slag discharge unit includes a slag discharge hopper, a slag discharge screw, and a slag discharge drive motor for driving the slag discharge screw to rotate. The slag discharge hopper is located below two sets of bubble plates, and the slag discharge hopper is provided with a slag discharge channel adapted to the slag discharge screw.

[0010] Preferably, the machine body is provided with a drive assembly for driving the two sets of bubble plates to open and close, thus separating the upper and lower parts of the machine body. The assembly includes a dual-output shaft geared motor, with a set of output shafts connected to both ends of the dual-output shaft geared motor. The bubble plates are provided with connecting shafts, and the ends of the output shafts are connected to the connecting shafts of the bubble plates through a gear transmission mechanism. The dual-output shaft geared motor drives the two sets of output shafts to rotate synchronously, thereby causing the two sets of connecting shafts to rotate in opposite directions.

[0011] Preferably, the body is further provided with a drainage trough, the drainage trough is provided with a switch valve, which includes a cylindrical valve core and a servo motor that drives it to rotate, the drainage trough is provided with a water outlet channel, the water outlet channel is provided with a valve seat adapted to the rotation of the valve core, the valve seat is horizontally connected, and the valve core has a through groove along its radial direction.

[0012] Compared with the prior art, this utility model has the following advantages and effects:

[0013] This invention utilizes a hollow, porous bubble plate to generate numerous microbubbles driven by an air pump. These microbubbles combine with organic suspended particles in wastewater to form scum that floats to the surface. A scraping unit promptly guides the scum into a discharge unit, effectively improving the flotation separation efficiency. The discharge unit's screw ensures efficient and continuous discharge of the scum, preventing scum accumulation from affecting the treatment effect. The design of two sets of bubble plates that can be opened and closed to separate the internal cavity of the machine accommodates both floating and settling processes, improving the equipment's adaptability to particles of different sizes and densities. A drainage trough and a controllable on / off valve facilitate cleaning and maintenance of the internal walls of the equipment, allowing for structural removal to ensure stable operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a wastewater treatment device for leather auxiliary agent production according to an embodiment of the present invention.

[0015] Figure 2 This is a structural cross-sectional view of a wastewater treatment device for leather auxiliary agent production according to an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the slag scraping unit in an embodiment of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the driving component in an embodiment of this utility model.

[0018] Figure 5 This is a schematic diagram of the drainage trough in an embodiment of the present invention.

[0019] Figure Numbers: Body 11, Inlet Hopper 12, Overflow Port 13, Bubble Plate 14, Air Hole 15, Air Pump 16, Gas Pipeline 17, Slag Scraping Unit 18, Slag Discharge Unit 19, Slag Scraping Cylinder 21, Slag Collection Cylinder 22, Slag Conveying Pipe 23, Slag Scraping Drive Motor 24, Slag Scraping Arm 25, Notch 26, Groove 27, Guide Plate 28, Slag Discharge Hopper 31, Slag Discharge Screw 32, Slag Discharge Drive Motor 33, Slag Discharge Channel 34, Drive Assembly 35, Dual Output Shaft Gear Motor 36, Output Shaft 37, Connecting Shaft 38, Gear Transmission Mechanism 39, Drainage Tank 41, Switch Valve 42, Valve Core 43, Steering Motor 44, Water Outlet Channel 45, Valve Seat 46, Through Groove 47. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0021] Example:

[0022] See Figure 1 - Figure 5 This embodiment relates to a wastewater treatment device for leather auxiliary production, specifically used for pretreatment of cleaning wastewater containing organic suspended particles such as water-based polyurethane resin, crosslinking agent, and auxiliaries generated during the production of leather auxiliary products. The device includes a body 11, which is equipped with an inlet hopper 12 and an overflow port 13. Two sets of bubble plates 14 are symmetrically rotated inside the body 11. Each bubble plate 14 has a hollow structure and several air holes 15 communicating with its interior. An air pump 16 is fixedly installed outside the body 11, and the air pump 16 is connected to the two sets of bubble plates 14 via a gas pipeline 17. A slag scraping unit 18 and a slag discharge unit 19 are respectively arranged interconnected at the top and bottom of the body 11.

[0023] Specifically, in this embodiment, the raw wastewater generated from stirring and washing enters the machine body 11 through the inlet hopper 12. The air pump 16 introduces air into the bubble plate 14 through the gas pipe 17. The gas forms a large number of microbubbles in the water through the air holes 15, causing the microbubbles to adhere to the suspended particles in the water. After the particles adhere to the bubbles, they form floating flocs with an apparent density less than water. The floating flocs float to the water surface, forming a scum layer. A coagulant can be added during this process to improve the water tightness of the suspended particle surface. The scum layer is scraped off by the scum scraping unit 18 and introduced into the scum discharge unit 19. At the same time, the collected suspended particles are discharged through the scum discharge unit 19. The wastewater after the suspended particles are removed flows out from the overflow port 13 (in actual use, an additional connecting pipe needs to be added to introduce the treated wastewater into the next treatment process), thereby achieving wastewater pretreatment. This invention utilizes a hollow bubble plate 14 with pores 15 to generate a large number of microbubbles under the drive of an air pump 16. These microbubbles combine with organic suspended particles in the wastewater to form scum that floats to the surface. The scum is then promptly guided into the scum discharge unit 19 by a scraping unit 18, effectively improving the efficiency of air flotation separation.

[0024] See Figure 2 and Figure 3 The slag scraping unit 18 includes a slag scraping cylinder 21, a slag collecting cylinder 22, and a slag conveying pipe 23. The slag scraping cylinder 21 is located above the machine body 11. The slag collecting cylinder 22 is rotatably located inside the slag scraping cylinder 21 and is equipped with a slag scraping drive motor 24 that drives its rotation. The outer periphery of the slag collecting cylinder 22 is provided with slag scraping arms 25 (not less than 3) that communicate with its interior. The end of the slag scraping arm 25 away from the slag collecting cylinder 22 is adapted to the inner wall of the slag scraping cylinder 21. The slag conveying pipe 23 is vertically fixed inside the machine body 11, and its upper end is rotatably connected to the bottom of the slag collecting cylinder 22.

[0025] The bubble plate 14 has a notch 26 that matches the outer surface contour of the slag conveying pipe 23. Sealing structures (sealing rings, sealing strips, etc.) are provided at the edges of the bubble plate 14, the notch 26, and the mating points with the slag conveying pipe 23. The slag conveying pipe 23 passes through the notches 26 of the two sets of bubble plates 14, and its lower end is connected to the slag discharge unit 19. Because the bubble plate 14 divides the machine body 11 into upper and lower cavities, with the slag scraper 21 and slag collection cylinder 22 located in the upper cavity and the slag discharge unit 19 located in the lower cavity, a negative pressure is formed inside the slag conveying pipe 23 during the slag discharge process of the slag discharge unit 19. When the equipment is running, the slag scraping drive motor 24 is started, which drives the slag collection cylinder 22 to rotate. The slag scraping arm 25 on the outer periphery of the slag collection cylinder 22 rotates accordingly, scraping the slag layer formed on the water surface from all sides towards the slag collection cylinder 22. The slag is guided into the slag collection cylinder 22 through the groove 27 of the slag scraping arm 25 and the guide plate 28, and then transported to the lower cavity through the slag conveying pipe 23 under negative pressure.

[0026] The scraper arm 25 is curved and has a U-shaped cross-section. Several sets of guide plates 28 are arranged obliquely within the groove 27 of the scraper arm 25. The angle between the guide plates 28 and the bottom surface of the groove 27 is 30°-45°. The guide plates 28 help guide the scum smoothly into the scum collection cylinder 22. When the scraper arm 25 rotates under the drive of the scum collection cylinder 22, after the scum enters the groove 27, the inclined surface of the guide plates 28 causes the scum to move along the direction of the guide plates 28 towards one side of the scum collection cylinder 22, reducing scum escape and improving the scum removal effect.

[0027] See Figure 2 The slag discharge unit 19 includes a slag discharge hopper 31, a slag discharge screw 32, and a slag discharge drive motor 33 that drives the slag discharge screw 32 to rotate. The slag discharge hopper 31 is located below two sets of bubble plates 14. The slag discharge hopper 31 is provided with a slag discharge channel 34 adapted to the slag discharge screw 32. The slag discharge screw 32 passes through the slag discharge channel 34 and extends to the outside of the slag discharge hopper 31, with one end fixedly connected to the motor shaft of the slag discharge drive motor 33. The slag discharge hopper 31 has an inverted conical structure with a large opening at the top for receiving floating slag transported from the slag conveying pipe 23. The bottom gradually narrows to form the slag discharge channel 34. The inner wall of the slag discharge channel 34 is adapted to the spiral blades of the slag discharge screw 32 to ensure that the slag discharge screw 32 can smoothly push the floating slag to the outlet of the slag discharge channel 34. When the floating slag enters the slag discharge hopper 31 through the slag conveying pipe 23, the slag discharge drive motor 33 starts, driving the slag discharge screw 32 to rotate within the slag discharge channel 34. The spiral blades of the slag discharge screw 32 gradually push the slag towards the outlet end of the slag discharge channel 34, realizing the continuous discharge of slag. At the same time, a negative pressure is formed in the slag discharge hopper 31, which helps to introduce the slag collected by the slag scraping unit 18.

[0028] Since some organic suspended particles cannot be removed by flotation, in this embodiment, see... Figure 4The machine body 11 is externally equipped with a drive assembly 35 for driving the opening and closing of two sets of bubble plates 14 to divide the interior of the machine body 11 vertically. This assembly includes a dual-output shaft geared motor 36, with an output shaft 37 connected to both ends of the motor. Each bubble plate 14 has a connecting shaft 38. The ends of the output shafts 37 are connected to the connecting shafts 38 of the bubble plates 14 via a gear transmission mechanism 39. The dual-output shaft geared motor 36 drives the two output shafts 37 to rotate synchronously, causing the two connecting shafts 38 to rotate in opposite directions. Through the precise engagement of the gear transmission mechanism 39, the synchronous opening and closing of the two sets of bubble plates 14 is achieved. Opening the two sets of bubble plates 14 allows suspended particles to settle into the slag discharge hopper 31 and be discharged together. This design of opening and closing the two sets of bubble plates 14 creates a flotation zone in the upper part for the flotation separation of suspended particles and a sedimentation zone in the lower part for the sedimentation and collection of unfloated particles, thereby improving the flexibility of the equipment. In this embodiment, the gear transmission mechanism 39 uses bevel gears to transmit torque in the vertical direction, and the drive component 35 is provided with a corresponding dustproof structure such as a housing (not shown in the figure).

[0029] After prolonged use, a large amount of organic particles adhere to the inner wall of the machine body 11 (mainly in the upper cavity), resulting in scaling. Therefore, regular cleaning and maintenance of the interior of the machine body 11 is necessary. (See also...) Figure 5 In this embodiment, the body 11 is further provided with a drainage trough 41, which is equipped with a switch valve 42, including a cylindrical valve core 43 and a servo motor 44 that drives its rotation. A water outlet channel 45 is provided within the drainage trough 41, and a valve seat 46 adapted to the rotation of the valve core 43 is provided within the water outlet channel 45. The valve seat 46 is horizontally connected, and the valve core 43 has a through groove 47 along its radial direction. During cleaning and maintenance, the switch valve 42 can be closed first, and the inner wall of the body 11 can be manually flushed. After cleaning, the valve core 43 is rotated by the servo motor 44 to align the through groove 47 horizontally with the valve seat 46, opening the drainage trough 41 to discharge wastewater and impurities for subsequent centralized treatment.

[0030] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A wastewater treatment device for leather auxiliaries production, comprising a body, characterized in that, The machine body is equipped with a water inlet and an overflow port. Two sets of bubble plates are symmetrically rotated inside the machine body. The bubble plates have a hollow structure and several air holes that communicate with the inside of the bubble plates. An air pump is fixedly installed outside the machine body. The air pump is connected to the two sets of bubble plates through a gas pipeline. A slag scraping unit and a slag discharge unit are respectively arranged at the top and bottom of the machine body and are interconnected.

2. The wastewater treatment equipment for leather auxiliary agent production according to claim 1, characterized in that: The slag scraping unit includes a slag scraping cylinder, a slag collecting cylinder, and a slag conveying pipe. The slag scraping cylinder is located above the machine body. The slag collecting cylinder is rotatably located inside the slag scraping cylinder and is equipped with a slag scraping drive motor that drives its rotation. A slag scraping arm is provided on the outer periphery of the slag collecting cylinder and communicates with its interior. The end of the slag scraping arm away from the slag collecting cylinder is adapted to the inner wall of the slag scraping cylinder. The slag conveying pipe is vertically fixed inside the machine body, and its upper end is rotatably connected to the bottom of the slag collecting cylinder. The bubble plate has a notch that matches the contour of the outer surface of the slag conveying pipe. The slag conveying pipe passes through the notches of the two sets of bubble plates, and its lower end is connected to the slag discharge unit.

3. The wastewater treatment equipment for leather auxiliary agent production according to claim 2, characterized in that: The scraper arm is curved and has a U-shaped cross-section design. Several sets of guide plates are arranged obliquely inside the groove of the scraper arm.

4. The wastewater treatment equipment for leather auxiliary agent production according to claim 1, characterized in that: The slag discharge unit includes a slag discharge hopper, a slag discharge screw, and a slag discharge drive motor for driving the slag discharge screw to rotate. The slag discharge hopper is located below two sets of bubble plates, and the slag discharge hopper is provided with a slag discharge channel adapted to the slag discharge screw.

5. The wastewater treatment equipment for leather auxiliary agent production according to claim 1, characterized in that: The machine body is provided with a drive assembly for driving the two sets of bubble plates to open and close, thus separating the upper and lower parts of the machine body. The assembly includes a dual-output shaft geared motor, with a set of output shafts connected to both ends of the dual-output shaft geared motor. The bubble plates are provided with connecting shafts, and the ends of the output shafts are connected to the connecting shafts of the bubble plates through a gear transmission mechanism. The dual-output shaft geared motor drives the two sets of output shafts to rotate synchronously, thereby causing the two sets of connecting shafts to rotate in opposite directions.

6. The wastewater treatment equipment for leather auxiliary agent production according to claim 1, characterized in that: The machine body is also provided with a drainage trough, which is equipped with a switch valve, including a cylindrical valve core and a servo motor that drives it to rotate. The drainage trough is provided with a water outlet channel, and a valve seat adapted to the rotation of the valve core is provided in the water outlet channel. The valve seat is horizontally connected, and the valve core has a through groove along its radial direction.

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