Scum scraping equipment for sewage treatment

Abstract

The utility model relates to the technical field of sludge scraping equipment in the sewage air floatation treatment process, in particular to scum scraping equipment for sewage treatment, which comprises an air floatation tank and a scraping part mounted above the air floatation tank, guide rails are arranged on two sides of the air floatation tank, a travelling crane for driving the scraping part to move is mounted on the guide rails, and the scraping part is mounted on the travelling crane. The scraping part comprises a scraping plate assembly, a standing platform is further arranged on the travelling crane, and guardrails are arranged on the two sides of the standing platform. In the air flotation process with a small amount of scum, an operator can stand on the standing platform and scrape the scum by using the manual scraper, so that the energy consumption is reduced, and meanwhile, the platform is arranged, so that the operator can operate conveniently, the situation that the operator directly stands on a travelling crane to generate potential safety hazards is avoided, and the working efficiency is improved. Meanwhile, through the arrangement of the travelling crane, the scraping part below can be driven to move, the basic scraping function is achieved, and it is ensured that scum in the air floatation tank can be stably scraped.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge scraping in the process of sewage flotation treatment, in particular to a scum scraping device for sewage treatment. Background Art

[0002] Flotation refers to the process of using highly dispersed tiny bubbles as carriers to adhere to pollutants in wastewater, making their buoyancy greater than gravity and floating resistance, so that pollutants float to the water surface to form foam, and then scraping the foam from the water surface with scraping equipment to achieve solid-liquid or liquid-liquid separation. In the flotation process, when bubbles act as carriers to adhere to pollutants and float to the water surface to form foam, the foam layer is scraped off with a scraper. This requires that the foam layer is relatively stable. If the foam is not scraped, it will burst, causing the separated pollutants to return to the wastewater, reducing the treatment effect. Therefore, the foam needs to be scraped off in time.

[0003] The current scum scraping equipment mainly adopts a scraping device for flotation as disclosed in Patent No. "ZL201811594157.6". The scraping device is fixedly installed above the flotation tank, and the scraping plate transmission mechanism in the scraping device drives the scraping plate to continuously rotate around it, thereby scraping off the scum in the flotation tank. However, such a structure has certain disadvantages. Since the scraping device is fixedly set, no matter how large or small the amount of scum is, the equipment can only be turned on for scraping. This results in a large amount of energy waste in the flotation tank with a small amount of scum. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a scum scraping device for sewage treatment, so as to solve the problem that the current scum scraping device will cause a large amount of energy waste when dealing with a small amount of scum.

[0005] The technical solution adopted by the utility model is: a scum scraping device for sewage treatment, comprising an air flotation tank and a scraping part installed above the air flotation tank, guide rails are arranged on both sides of the air flotation tank, a traveling crane is installed on the guide rails for driving the scraping part to move, the scraping part comprises a scraper assembly, a standing platform is also arranged on the traveling crane, and guardrails are arranged on both sides of the standing platform.

[0006] The above structure has the following beneficial effects:

[0007] 1. Through the setting of the crane, the scraping part below can be driven to move, realizing the basic scraping function and ensuring that the scum in the flotation tank can be scraped stably.

[0008] 2. A standing platform for people is installed above the crane. When used in the flotation process with a small amount of slag, the operator can stand on the standing platform and scrape it with a manual scraper to reduce energy consumption. At the same time, the setting of the platform can also facilitate the operation of the staff, avoiding the situation where the staff stand directly on the crane and cause safety hazards.

[0009] 3. Guardrails are installed on both sides of the standing platform to protect the workers above the standing platform and prevent them from falling into the flotation tank, thus ensuring construction safety.

[0010] Preferably, the scraping portion includes a first bracket, two ends of which are rotatably connected to a first rotating shaft and a second rotating shaft, two ends of the first rotating shaft are respectively connected to a driving wheel, two ends of the second rotating shaft are respectively connected to a driven wheel, a transmission chain is connected between the driving wheel and the driven wheel, the scraper assembly is mounted on the transmission chain, and the driving wheel is connected to a first driving mechanism for driving the driving wheel to rotate.

[0011] Through the cooperation of the driving wheel and the driven wheel, the scraper is driven to follow the conveyor chain to rotate around the driving wheel and the driven wheel, and then the scum below is scraped off. The scum scraping equipment can not only save energy when the amount of scum is small, but also can be used in occasions with a large amount of scum to perform efficient scum scraping work.

[0012] Preferably, the scraper assembly comprises a connecting rod connected to the transmission chain and a scraper mounted on the connecting rod, and both ends of the connecting rod are respectively connected to one of the transmission chains.

[0013] By connecting the two ends of the connecting rod to one of the transmission chains respectively, the connecting rod is driven to move by the two transmission chains at the same time, so that the scraper can scrape the scum more stably.

[0014] Preferably, the scraper is rotatably connected to the connecting rod, and a limiting block for limiting the scraper is provided on one side of the connecting rod.

[0015] The scraper is rotatably connected, and through the limiting effect of the limit block, the scraper is limited by the limit block during the driving process of the active wheel, and moves in the direction of the scum outlet to maintain a vertical state, so as to effectively scrape the scum. When the scraper follows the vehicle to move toward the side away from the scum outlet, the scraper is tilted under the action of the water flow, thereby reducing the probability of the scum being pushed by the scraper to move in the direction away from the scum outlet.

[0016] Preferably, the first bracket is also connected to a lifting mechanism, which includes a screw rod rotatably connected to the crane and a threaded hole opened on the first bracket, the screw rod is connected to the threaded hole through threads, and the screw rod is also connected to a second driving assembly.

[0017] The lifting mechanism can stably drive the first bracket to rise or fall along the screw rod through the cooperation between the screw rod and the threaded hole. The setting of the lifting mechanism can, on the one hand, adjust the height of the scraping part according to the liquid level in the flotation tank, so as to achieve more efficient scum scraping. On the other hand, when the amount of scum is not large, the scraping part can be raised too high to make the scraper leave the liquid surface, which can avoid the scraper blocking the scum when not working, thereby enabling workers to manually scrape the scum more conveniently.

[0018] Preferably, two screw rods are provided, and the screw rods are symmetrically arranged at the left and right ends of the first bracket, and the second driving assembly is connected to the two screw rods simultaneously.

[0019] The second driving assembly drives the two screw rods to move simultaneously, so that the left and right ends of the first bracket rise or fall simultaneously, which can make the rise or fall of the scraping part more consistent and stable.

[0020] Preferably, guide rods are respectively provided on both sides of the screw rod, a guide hole for matching with the guide rod is opened on the first bracket, and a limit plate is connected to the bottom end of the guide rod.

[0021] The cooperation between the guide rod and the guide hole can guide the movement direction of the first bracket, ensuring that the first bracket can only move along the arrangement direction of the guide rod, preventing the first bracket from tilting or shifting during the movement. At the same time, the limit plate at the bottom of the guide rod can limit the lowest position of the first bracket, preventing the first bracket from falling into the flotation tank, thereby improving the safety of the equipment.

[0022] Preferably, the carriage is also provided with a cleaning mechanism for cleaning the scraper, and the cleaning mechanism includes a plurality of nozzles.

[0023] The scraper passing through the cleaning mechanism can be sprayed with water or air through the nozzle, thereby flushing or blowing off the scum attached to the scraper, thereby preventing the scraper from bringing the scum back into the return air flotation tank.

[0024] Preferably, a baffle is further provided in the flotation tank, the side of the baffle facing the scraping portion is an inclined surface, and the bottom end of the scraper is connected to flexible bristles.

[0025] The baffle can block the liquid in the flotation tank in the flotation tank, while the scum can enter the separation tank behind from above the baffle. The upper end of the baffle is set as an inclined surface to guide the scum, making it easier for the scum to leave the baffle. At the same time, connecting flexible bristles at the bottom of the scraper can also avoid collision between the scraper and the baffle, which may cause damage to the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a three-dimensional structural schematic diagram of a scum scraping device for sewage treatment.

[0027] Figure 2 The utility model is a schematic diagram of the top view of the structure of a scum scraping device for sewage treatment.

[0028] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the "AA" area.

[0029] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure of the "B" area.

[0030] Figure 5 for Figure 2 Schematic diagram of the local cross-sectional structure of the "CC" area in Example 2.

[0031] Figure 6 for Figure 5 Schematic diagram of the local cross-sectional structure of the "DD" area.

[0032] Among them, there are the flotation tank 10, the guide rail 11, the baffle 12, the crane 20, the standing platform 21, the guardrail 22, the first bracket 31, the first rotating shaft 32, the second rotating shaft 33, the driving wheel 34, the driven wheel 35, the transmission chain 36, the first driving mechanism 37, the scraper assembly 40, the scraper 41, the connecting rod 42, the angle piece 43, the limit block 44, the bristles 45, the lifting mechanism 50, the screw 51, the guide rod 52, the second driving assembly 53, the limit plate 54, and the nozzle 60. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Example 1

[0035] According to the instruction manual Figure 1-4As shown, the utility model provides a scum scraping device for sewage treatment, including an air flotation tank 10 and a scraping part installed above the air flotation tank 10, two parallel guide rails 11 are arranged on both sides of the air flotation tank 10, a traveling crane 20 moving along the guide rails 11 is installed on the traveling crane 20, a standing platform 21 for operators to stand on is welded on the traveling crane 20, and guardrails 22 are welded on the front and rear sides of the standing platform 21.

[0036] The scraping part includes a first bracket 31, the front end of the first bracket 31 is rotatably connected to the first rotating shaft 32 through a bearing flange, and the rear end of the first bracket 31 is rotatably connected to the second rotating shaft 33 through a bearing flange, wherein the left and right ends of the first rotating shaft 32 are also connected to two driving wheels 34, and the left and right ends of the second rotating shaft 33 are also connected to two driven wheels 35, and the driving wheels 34 and the driven wheels 35 at each end are also connected by a transmission chain 36, and a first driving mechanism 37 is also fixedly installed in the middle of the first bracket 31 by bolts; three groups of scraper assemblies 40 are also connected to the transmission chain 36, wherein the scraper assembly 40 includes a connecting rod 42 and a scraper 41 installed on the connecting rod 42, and the two ends of the connecting rod 42 are respectively connected to the transmission chain 36 by an angle piece 43. In this embodiment, the first driving mechanism 37 adopts a motor, and the first driving mechanism 37 is connected to the first rotating shaft 32 through a driving chain. The first driving mechanism 37 can drive the driving wheel 34, the driven wheel 35 and the transmission chain 36 connected thereto to rotate, thereby driving the scraper 41 to rotate along with the transmission chain 36 to scrape off the scum in the flotation tank 10.

[0037] In the present embodiment, a through hole is provided on the scraper 41, and the scraper 41 is rotatably connected to the connecting rod 42 through the through hole. At the same time, a limit block 44 is welded on the angle piece 43. The limit block 44 located on the lower transmission chain 36 is installed on the side of the connecting rod 42 away from the forward direction of the scraper 41, so that when the scraper assembly 40 on the lower transmission chain 36 moves with the transmission chain 36, the limit block 44 can limit the rotation of the scraper 41, so that the scraper 41 remains in a vertical state, so that the scum can be stably scraped off. When the first driving mechanism 37 does not operate and the crane 20 moves toward the direction away from the scum outlet in the flotation tank 10, the scraper 41 is no longer blocked by the limit block 44 and can rotate along the connecting rod 42, thereby reducing the probability of the scraper 41 pushing the scum toward the side away from the scum outlet. At the same time, when manual scraping is performed, the scum in the flotation tank 10 can also pass through the scraper 41 and move toward the side of the scum outlet.

[0038] In the present embodiment, a cleaning mechanism is further installed on the side of the crane 20 facing the scum outlet, wherein the cleaning mechanism includes five nozzles 60, and the nozzles 60 are connected to a high-pressure air pump. The nozzles 60 are used to blow toward the rotating scraper 41 to blow off the scum attached to the scraper 41, which can effectively prevent the scum from returning to the flotation tank 10 again, thereby improving the scum removal effect. At the same time, in order to improve the use effect of the nozzle 60, the nozzle 60 is connected to the crane 20 through a bamboo tube, which can greatly increase the angle adjustment range of the nozzle 60 so that it can be adjusted according to the actual height of the scraper 41.

[0039] A baffle 12 is also provided at the scum outlet of the flotation tank 10, and the baffle 12 blocks the sewage below the scum, and the scum enters the separation tank behind the baffle 12 from above the baffle 12 under the action of the scraping part. The side of the baffle 12 facing the flotation tank 10 is an inclined surface. The setting of the inclined surface can not only enable the scum to enter the rear separation tank under the push of the scraper 41, but also avoid excess sewage from entering the separation tank as much as possible. At the same time, in this embodiment, the bottom end of the scraper 41 is also connected to a flexible bristle 45, so that the scraper 41 can effectively avoid the scraper 41 from colliding with the baffle 12 at the joint of the bristles 45 and the baffle 12, thereby improving the service life of the equipment and ensuring that the equipment can stably scrape the scum.

[0040] Its working principle is that when a small amount of scum needs to be scraped off, the crane 20 is driven to move to the middle of the flotation tank 10, and the operator can stand on the standing platform 21 and scrape it off with the manual scraper 41 to reduce energy waste. When the amount of scum is large, the scraper 41 is driven to move by the first driving mechanism 37 to push the scum toward the scum outlet, so that the scum on the flotation tank 10 can be automatically scraped off efficiently.

[0041] Example 2

[0042] According to the instruction manual Figure 5-6As shown, the difference between this embodiment and embodiment 1 is that a lifting mechanism 50 is also installed on the first bracket 31 and the crane 20 bracket, and the lifting mechanism 50 includes two screw rods 51 rotatably connected to the bottom of the crane 20, and the screw rods 51 are connected to the crane 20 through a bearing flange. Threaded holes matching the screw rods 51 are also provided on the left and right sides of the first bracket 31, and the screw rods 51 are connected to the first bracket 31 through the threaded holes, so that when the screw rods 51 rotate, the first bracket 31 can rise or fall. In order to facilitate the movement of the screw rods 51, the screw rods 51 are also connected to a second driving assembly 53, and the second driving assembly 53 includes a second driving member and a driving rod connected to the second driving member. A first bevel gear is respectively arranged at both ends of the driving rod, and second bevel gears matching the first bevel gears at both ends of the driving rod are respectively connected to the screw rods 51 on both sides of the first bracket 31. In this embodiment, the second driving member adopts a driving motor, and two brackets for supporting the driving rods are also installed at the bottom of the truss, and bearing flanges are arranged on the brackets to ensure that the driving rods can be safer and more stable during rotation.

[0043] In this embodiment, in order to improve the stability of the first bracket 31 during the lifting process, a guide rod 52 is fixed on both sides of each screw rod 51, and a guide hole for cooperating with the guide rod 52 is opened on the first bracket 31. Through the cooperation between the guide hole and the guide rod 52, the movement of the first bracket 31 can be effectively guided to ensure that the first bracket 31 can only move along the direction set by the guide rod 52. At the same time, a limit plate 54 is fixedly installed at the bottom of the guide rod 52. The limit plate 54 can limit the lowest position of the first bracket 31 to prevent the first bracket 31 from falling into the flotation tank 10, thereby improving the safety of the equipment.

[0044] Its working principle is that when a small amount of scum is manually scraped off, the first bracket 31 is driven up by the second driving mechanism, so that the scraper 41 can leave the liquid surface in the flotation tank 10, and the scraper 41 will not block the scum floating on the liquid surface, so that the scum can be scraped off more smoothly. When a large amount of scum needs to be scraped off, the scraper 41 is driven down by the second driving mechanism to scrape off the scum. At the same time, the height of the scraper 41 can also be adjusted according to the liquid level, thereby achieving better scraping efficiency.

[0045] The directional terms mentioned in the present invention, such as "up", "down", "left", "right", etc., are only for better and clearer explanation and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] The above is a description of the preferred embodiments of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the utility model are within the scope of protection of the utility model.

Claims

1. A scum scraping device for sewage treatment, comprising an air flotation tank and a scraping part installed above the air flotation tank, characterized in that: Guide rails are arranged on both sides of the flotation tank, and a crane is installed on the guide rails for driving the scraping part to move. The scraping part includes a scraper assembly. A standing platform is also arranged on the crane, and guardrails are arranged on both sides of the standing platform.

2. A scum scraping device for sewage treatment according to claim 1, characterized in that: The scraping part includes a first bracket, and the two ends of the first bracket are respectively rotatably connected to a first rotating shaft and a second rotating shaft, the two ends of the first rotating shaft are respectively connected to a driving wheel, and the two ends of the second rotating shaft are respectively connected to a driven wheel, a transmission chain is connected between the driving wheel and the driven wheel, the scraper assembly is installed on the transmission chain, and the driving wheel is connected to a first driving mechanism for driving the driving wheel to rotate.

3. A scum scraping device for sewage treatment according to claim 2, characterized in that: The scraper assembly comprises a connecting rod connected to the transmission chain and a scraper installed on the connecting rod, and both ends of the connecting rod are respectively connected to one of the transmission chains.

4. A scum scraping device for sewage treatment according to claim 3, characterized in that: The scraper is rotatably connected to the connecting rod, and a limiting block for limiting the scraper is provided on one side of the connecting rod.

5. A scum scraping device for sewage treatment according to claim 4, characterized in that: The first bracket is also connected to a lifting mechanism, which includes a screw rod rotatably connected to the crane and a threaded hole opened on the first bracket. The screw rod is connected to the threaded hole through threads, and the screw rod is also connected to a second driving assembly.

6. A scum scraping device for sewage treatment according to claim 5, characterized in that: The screw rods are provided with two screw rods, and the screw rods are symmetrically arranged at the left and right ends of the first bracket, and the second driving assembly is connected to the two screw rods at the same time.

7. A scum scraping device for sewage treatment according to claim 6, characterized in that: Guide rods are respectively arranged on both sides of the screw rod, a guide hole for matching with the guide rod is opened on the first bracket, and a limit plate is connected to the bottom end of the guide rod.

8. The scum scraping equipment for sewage treatment according to claim 4, characterized in that: The carriage is also provided with a cleaning mechanism for cleaning the scraper, and the cleaning mechanism includes a plurality of nozzles.

9. The scum scraping equipment for sewage treatment according to claim 3, characterized in that: A baffle is also arranged in the air flotation tank, the side of the baffle facing the scraping part is an inclined surface, and the bottom end of the scraper is connected with flexible bristles.

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