A traveling skimmer for wastewater treatment

Abstract

This utility model relates to the technical field of sewage treatment equipment, and in particular to a traveling skimmer for sewage treatment, comprising a flotation tank, a track, and a skimming mechanism. The flotation tank is a rectangular cavity structure with an open top, and the track and skimming mechanism are arranged on the upper part of the flotation tank. The skimming mechanism includes a base, a first rotating shaft, a first drive motor, a sliding table, gears, and a skimming plate. The first rotating shaft is arranged on the upper part of the base, and the first rotating shaft is connected to a rotating wheel through second transmission chains at both ends. The sliding table is movably connected to a sliding groove on the base through sliding strips on both sides, and one end of the sliding table is connected to the skimming plate through a first connecting rod. The second rotating shaft is arranged on the upper part of the base, and the gear on the second rotating shaft is meshed with a rack on the side of the sliding table. The entire skimming plate of this utility model can be automatically adjusted as needed, and a puncturing plate is designed to puncture air bubbles during the skimming process, thereby improving the automation level and skimming efficiency of the equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, and in particular to a traveling skimmer for sewage treatment. Background Technology

[0002] In the field of wastewater treatment, dissolved air flotation (DAF) tanks, as a highly efficient solid-liquid separation device, are widely used to remove suspended particles, oils, and colloidal substances with densities close to or less than water from wastewater. Their working principle involves introducing a large number of microbubbles into the wastewater, causing the bubbles to adsorb with suspended impurities, forming flocs with a density less than water. These flocs then float to the surface, forming scum, which is then removed by skimming equipment to achieve wastewater purification. Therefore, the efficiency and effectiveness of skimming directly affect the overall treatment performance of the DAF tank and is an indispensable key link in the wastewater treatment process.

[0003] Currently, the industry mostly uses traveling-type skimmers for skimming in dissolved air flotation (DAF) tanks. These skimmers move along the length of the DAF tank using a traveling trolley, scraping the scum from the surface into a collection tank using fixed skimming plates. However, traditional traveling-type skimmers typically have fixed skimming plates, whose height cannot be adaptively adjusted according to changes in the liquid level within the DAF tank. In actual operation, the liquid level in the DAF tank fluctuates due to factors such as changes in influent flow and treatment load. When the liquid level drops, the fixed-height skimming plates create a large gap with the liquid surface, preventing the scum from being effectively scraped off. This requires operators to stop the machine and manually adjust the skimming plate height, which not only interrupts the wastewater treatment process and reduces treatment efficiency but also increases manual operating costs, resulting in poor ease of use.

[0004] Furthermore, while scum forms on the surface of the dissolved air flotation tank, a large number of independent air bubbles that have not combined with impurities often remain. These bubbles are densely distributed and have a certain degree of stability. If not treated in time, they will enter the scum collection tank along with the scum during the skimming process. On the one hand, this results in an excessively high proportion of air bubbles in the scum, reducing the effective volume utilization rate of the scum collection tank. On the other hand, the bursting of these bubbles may cause some fine impurities to return to the wastewater, affecting the effectiveness of subsequent treatment processes and even increasing the risk of effluent exceeding standards. Traditional skimming equipment can only scrape off the scum and cannot solve the problem of residual air bubbles, further limiting its application in high-efficiency wastewater treatment scenarios. Based on this, a traveling skimming device was designed. The entire skimming plate can be automatically adjusted as needed, and a puncture plate is designed to puncture the air bubbles during the skimming process, thereby improving the automation level, operational stability, and skimming efficiency of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a traveling skimmer for sewage treatment. The entire skimming plate can be automatically adjusted as needed, and a puncture plate is designed to puncture air bubbles during the skimming process, thereby improving the automation level, operational stability and skimming efficiency of the equipment.

[0006] The technical implementation scheme of this utility model is as follows:

[0007] A traveling skimmer for wastewater treatment includes a flotation tank, a track, and a skimming mechanism. The flotation tank is a rectangular cavity structure with an open top, and the track and skimming mechanism are installed on the upper part of the flotation tank. The skimming mechanism includes a base, a first rotating shaft, a first drive motor, a second drive motor, a second rotating shaft, a sliding table, gears, and a skimming plate. The first rotating shaft is installed on the upper part of the base, and the first rotating shaft is connected to a rotating wheel through second transmission chains at both ends to form a first transmission structure. The sliding table is movably connected to a sliding groove on the base through sliding strips on both sides, and one end of the sliding table is connected to the skimming plate through a first connecting rod. The second rotating shaft is installed on the upper part of the base, and the gear on the second rotating shaft meshes with a rack on the side of the sliding table to form a second transmission structure.

[0008] Optionally, a first sprocket is provided on the output shaft of the first drive motor, and the first sprocket is connected to a second sprocket on the first rotating shaft via a first transmission chain.

[0009] Optionally, the second drive motor is connected to the base via a motor support at the bottom, and the output shafts at both ends of the second drive motor are connected to the second rotating shaft via couplings.

[0010] Optionally, the skimming plate is connected to the first link via a second link.

[0011] Optionally, the upper part of the skimming plate is provided with a bubble-breaking plate, and the upper part of the bubble-breaking plate is provided with a number of needles.

[0012] Optionally, a third sprocket is provided at both ends of the first rotating shaft, and the third sprocket is connected to a fourth sprocket on the rotating shaft of the rotating shaft through a second transmission chain.

[0013] Optionally, a protective cover is provided on the upper part of the skimming mechanism.

[0014] This utility model has the following advantages:

[0015] 1. This utility model provides a skimming device at the top of the flotation tank, which can skim the scum from the bottom. The base is mounted on a track via a rotating wheel, which is driven by a first drive motor to form a walking structure. A sliding platform is provided on the top of the base, which can be raised and lowered under the drive of a second drive motor, thereby raising and lowering the entire skimming plate to adapt to different liquid levels and improve the skimming efficiency of the equipment.

[0016] 2. In this utility model, a piercing plate is provided on the upper part of the skimming plate, and a piercing needle is provided on the upper part of the plate. The needle can move with the skimming plate and pierce the air bubbles on the upper part of the flotation tank during the skimming process, thereby improving the skimming effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the front view of the present invention.

[0019] Figure 3 This is a schematic diagram of the slag skimming mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the first rotating shaft part of this utility model.

[0021] Figure 5 This is a schematic diagram of the sliding table part of this utility model.

[0022] The meanings of the reference numerals in the attached diagram are as follows: 1-flocculation tank, 2-track, 3-skimming mechanism, 301-base, 303-rotor, 304-first rotating shaft, 306-third sprocket, 307-second transmission chain, 308-fourth sprocket, 310-sliding table, 311-first connecting rod, 312-second connecting rod, 313-skimming plate, 314-bubble breaking plate, 315-second sprocket, 316-first transmission chain, 317-first sprocket, 318-first drive motor, 319-second drive motor, 320-gear, 322-slide groove, 323-slide bar, 324-second rotating shaft, 4-protective cover. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0024] like Figures 1-5As shown, a traveling skimmer for wastewater treatment includes a flotation tank 1, a track 2, and a skimming mechanism 3. The flotation tank 1 is a rectangular cavity structure with an open top, and the track 2 and skimming mechanism 3 are arranged on the upper part of the flotation tank 1. The skimming mechanism 3 includes a base 301, a first rotating shaft 304, a first drive motor 318, a second drive motor 319, a second rotating shaft 324, a sliding table 310, a gear 320, and a skimming plate 313. The first rotating shaft 304 is arranged on the upper part of the base 301. The first rotating shaft 304 is connected to the rotating wheel 303 through the second transmission chains 307 at both ends to form a first transmission structure; the sliding table 310 is movably connected to the sliding groove 322 on the base 301 through the sliding strips 323 on both sides, and one end of the sliding table 310 is connected to the skimming plate 313 through the first connecting rod 311; the second rotating shaft 324 is set on the upper part of the base 301, and the gear 320 on the second rotating shaft 324 meshes with the rack on the side of the sliding table 310 to form a second transmission structure.

[0025] It should be noted that during the operation of the dissolved air flotation (DAF) tank 1, a large number of microbubbles are introduced into the wastewater, causing the bubbles to adsorb with suspended impurities to form flocs with a density less than water. These flocs then float to the surface to form scum, which is then removed by a skimming device to achieve wastewater purification. Traditionally, a mobile skimming device is used for scum removal. However, the liquid level in the DAF tank 1 fluctuates due to factors such as changes in influent flow and treatment load. When the liquid level drops, the fixed-height skimming plate creates a large gap with the liquid surface, preventing the scum from being effectively removed. In this case, the operator needs to stop the machine and manually adjust the height of the skimming plate, which not only interrupts the wastewater treatment process and reduces treatment efficiency but also increases manual operation costs and is not very convenient to use. Therefore, the traditional skimming structure has been optimized and designed as an automated adjustment device to improve the convenience of the equipment.

[0026] It should be further explained that the bottom of the base 301 is connected to the track 2 on the upper part of the flotation tank 1 via a rotating wheel 320. Moreover, the upper part of the base 301 is provided with a first rotating shaft 304. The first rotating shaft 304 is connected to the rotating wheel 303 via a second transmission chain 307 to form a first transmission structure. This structure drives the entire device to move via a first drive motor 318, thereby moving the skimming plate 313 to achieve skimming operation. The sliding table 310 is movably connected to the sliding groove 322 on the base 301 via sliding strips 323 on both sides. Furthermore, the sliding table 310 is meshed with the gear 320 on the second rotating shaft 324 via a rack on its side. This allows the entire skimming plate 313 to be raised and lowered under the drive of the second drive motor 319, so as to adjust according to the liquid level.

[0027] like Figures 1-5As shown, a first sprocket 317 is provided on the output shaft of the first drive motor 318, and the first sprocket 317 is connected to a second sprocket 315 on the first rotating shaft 304 through a first transmission chain 316; the second drive motor 319 is connected to the base 301 through a motor support at the bottom, and the output shafts at both ends of the second drive motor 319 are connected to the second rotating shaft 324 through couplings; the skimming plate 313 is connected to the first connecting rod 311 through a second connecting rod 312.

[0028] It should be noted that the second drive motor 319 is a dual-head motor. Its output shaft is connected to the second rotating shaft 324 through a coupling to form a drive structure, which in turn drives the entire sliding table 310 to rise and fall through the gear 320, thereby realizing the raising and lowering of the entire skimming plate 313. In order to achieve adjustment, a storage battery is set on the upper part of the base 301 to provide power for the first drive motor and the second drive motor 319.

[0029] like Figures 1-5 As shown, a bubble-breaking plate 314 is provided on the upper part of the skimming plate 313, and a plurality of needles are provided on the upper part of the bubble-breaking plate 314; a third sprocket 306 is provided at both ends of the first rotating shaft 304, and the third sprocket 306 is connected to the fourth sprocket 308 on the rotating main shaft of the rotating wheel 303 through the second transmission chain 307; a protective cover 4 is provided on the upper part of the skimming mechanism 3.

[0030] It should be noted that a bubble-breaking plate 314 is set on the skimming plate 313, with several needles on its upper part. The needles can move with the skimming plate 313 to puncture the bubbles. The purpose of this design is that if the proportion of bubbles in the scum is too high, it will reduce the effective volume utilization rate of the scum collection tank. Moreover, after the bubbles are broken, some fine impurities may return to the sewage, affecting the effect of subsequent treatment processes. Therefore, the bubbles are punctured during the skimming process and pushed into the collection tank.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A traveling skimmer for wastewater treatment, comprising a flotation tank (1), a track (2), and a skimming mechanism (3), characterized in that, The flotation tank (1) is a rectangular cavity structure with an opening at the top, and the upper part of the flotation tank (1) is equipped with a track (2) and a skimming mechanism (3). The skimming mechanism (3) includes a base (301), a first rotating shaft (304), a first drive motor (318), a second drive motor (319), a second rotating shaft (324), a sliding table (310), a gear (320), and a skimming plate (313). The upper part of the base (301) is provided with the first rotating shaft (304), and the first rotating shaft (304) is connected to the rotating wheel (303) through the second transmission chains (307) at both ends to form a first transmission structure. The sliding table (310) is movably connected to the sliding groove (322) on the base (301) via the sliding strips (323) on both sides, and one end of the sliding table (310) is connected to the skimming plate (313) via the first connecting rod (311); The second rotating shaft (324) is located on the upper part of the base (301), and the gear (320) on the second rotating shaft (324) meshes with the rack on the side of the sliding table (310) to form a second transmission structure.

2. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The first drive motor (318) has a first sprocket (317) on its output shaft, and the first sprocket (317) is connected to the second sprocket (315) on the first rotating shaft (304) via the first transmission chain (316).

3. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The second drive motor (319) is connected to the base (301) via the motor support at the bottom, and the output shafts at both ends of the second drive motor (319) are connected to the second rotating shaft (324) via couplings.

4. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The skimming plate (313) is connected to the first link (311) via the second link (312).

5. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The skimming plate (313) is provided with a bubble-breaking plate (314) on its upper part, and the bubble-breaking plate (314) is provided with a number of needles on its upper part.

6. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The first rotating shaft (304) is provided with a third sprocket (306) at both ends, and the third sprocket (306) is connected to the fourth sprocket (308) on the rotating shaft of the rotating wheel (303) through the second transmission chain (307).

7. A traveling skimmer for wastewater treatment according to claim 1, characterized in that, The upper part of the skimming mechanism (3) is provided with a protective cover (4).

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