Electric roller filtering device for aquaculture

Abstract

The utility model discloses an electric roller filtering device for aquaculture, which adopts a non-sinking design as a whole, a motor drives a roller to enable the roller to generate centrifugal force to centrifugally throw filtered purified water out of a filter screen, and solid sludge is brought to the upper part of the inner side of the roller along with the centrifugal force along with the rotation of the roller. A pressurized water column is installed above the roller to flush the outer side of the filter screen so as to flush solid sludge into the sewage collecting tank, the pressurized water column on the outer side of the shell impacts the sludge in the sewage collecting tank and flushes the sludge into the sewage discharging pipe, the sludge on the filter screen is flushed thoroughly in time, continuous filtering is achieved, and the filtering efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of aquaculture technology, specifically relating to an electric drum filter device for aquaculture. Background Technology

[0002] In traditional factory-style aquaculture, as feed is continuously added, the amount of organic suspended solids in the water gradually increases. The larger the fish and shrimp grow, the more waste they excrete. Under normal metabolic conditions, the solid excrement of fish and shrimp in the aquaculture water also exists in the form of suspended solids. Suspended solids are slightly heavier than water, have small particles, good flowability, and a certain degree of adhesion, and remain suspended in the presence of water flow.

[0003] An increase in suspended solids accumulation in aquaculture water will make the water turbid, affecting the filtration of the gills and respiration of farmed fish, increasing environmental stress on fish, deteriorating water quality, and consuming dissolved oxygen in the water. Currently, in factory aquaculture, physical and / or biological filtration methods are usually used to remove suspended solids from the aquaculture water in a timely manner. Physical filtration is the first line of defense in aquaculture and a primary prerequisite for ensuring clear water quality. Biological filtration, while ensuring water clarity, also ensures the healthy growth of fish and shrimp, and has a significant water purification function for aquaculture.

[0004] Currently, commonly used physical filtration methods in aquaculture include rotary drum filters and aquatic centrifugal microfiltration. Rotary drum filters, which continuously filter while backwashing, offer high efficiency and effectiveness, making them widely used. However, traditional rotary drum filters mostly use a submersible drum to filter suspended solids. They struggle to effectively filter small colloidal particles and dissolved substances. Furthermore, due to limitations in filter structure and backwashing methods, "dead zones" may exist, where impurities cannot be effectively removed during backwashing. Aquatic microfiltration machines have relatively high operating costs, potentially increasing investment costs for small-scale farmers. Regular cleaning and maintenance are also necessary, leading to higher maintenance costs. Additionally, submersible microfiltration machines, because they sink to the bottom and fail to filter suspended solids promptly, can cause elevated levels of toxins such as ammonia and nitrite, which can negatively impact filtration efficiency in poor water quality. Utility Model Content

[0005] To address the above problems, this utility model provides an electric drum filter device for aquaculture. The device features a non-submerged design, where a motor drives the rollers to generate centrifugal force, which centrifugally ejects the filtered water from the filter screen. As the drum rotates, solid sludge is also carried to the upper inner side of the drum by centrifugal force. A pressurized water column installed above the drum washes the outer side of the filter screen, flushing the solid sludge into a collection tank. The pressurized water column on the outside of the casing impacts the sludge in the collection tank, flushing it into the drain pipe. The sludge on the filter screen is promptly washed away, achieving continuous filtration and improving filtration efficiency.

[0006] The technical solution disclosed in this utility model is as follows:

[0007] An electric drum filter for aquaculture includes a housing, a drive unit, a drum, a filter screen, a sludge collection tank, a water inlet pipe, and a backwashing device. The bottom of the housing is provided with a clean water collection port. The drum is located inside the housing and has several filter holes on its wall. The filter screen is fixed to the outside of the drum. The drive unit controls the rotation of the drum. The water inlet pipe passes through the housing and extends into the drum. The sludge collection tank passes horizontally through the inside of the drum, and its other end is connected to a drain pipe located outside the housing. The drain pipe is located outside the housing. The backwashing device is fixed inside the housing, outside the drum, and directly above the sludge collection tank.

[0008] Preferably, the left and right sides of the roller are not sealed, and a water baffle is fixed at the end of the left and right sides of the roller along its periphery to prevent the liquid inside the roller from flowing out of the roller.

[0009] Preferably, the driving component includes a motor, three unpowered rollers, and one powered roller. The motor is located outside the housing, and a fixed base is provided at the bottom inner side of the housing. The three unpowered rollers and one powered roller are fixed on the fixed base in a square position. Wheel baffles are provided on the outer periphery of the left and right sides of the roller. The three unpowered rollers and one powered roller are rotatably connected to the wheel baffles. The motor drives the powered roller to rotate, which in turn drives the unpowered rollers connected to it to rotate, which in turn drives the roller to rotate, and then drives the other two unpowered rollers to rotate as well.

[0010] Preferably, the two ends of the sludge collection tank extend out of the housing, and the bottom of one end is connected to a drain pipe, which is vertically arranged.

[0011] Preferably, the backwashing device includes a pressurized water pump, a backwashing pipe, and nozzles. The water pump is located outside the housing, and the backwashing pipe is connected to the water pump and extends into the housing, directly above the sludge collection tank. One or more nozzles are connected to the backwashing pipe directly above the sludge collection tank.

[0012] Preferably, the filter screen has a pore size of no more than 38μm, and both ends of the filter screen are fixed to the roller by fixing plates.

[0013] Preferably, the booster pump is also connected to the inlet pipe.

[0014] Compared with the prior art, the present invention has the following technical advantages:

[0015] (1) This utility model has a mesh fixing mechanism on the filter screen that can withstand a large flushing water pressure. The powerful water flow generated by the pressurized water pump backwashes the filter screen, which can quickly and effectively remove the impurities accumulated on the filter screen. During the backwashing process, the motor controls the drum to rotate in the opposite direction, and high-pressure water is sprayed from the outside of the drum to the inside, washing the impurities into the collection tank below and discharging them out of the filter device. This can completely remove the impurities on the filter screen, prevent the filter screen from clogging, and not affect the filtration efficiency.

[0016] (2) This utility model adopts high-efficiency filtration technology and fine filter screen (pore size not greater than 38μm), which can more thoroughly remove impurities and pollutants from the water, making the water clearer and more transparent. It helps to improve the quality of the living environment of aquatic organisms, reduce the risk of disease, and promote the healthy growth of aquatic organisms. Backwashing can be performed on a regular basis, eliminating the need for manual judgment on when backwashing is needed, saving labor costs, and ensuring the continuous and stable operation of the filtration system.

[0017] (3) The rotation speed of the drum can be adjusted according to the actual filtration needs. The filtration speed can be flexibly adjusted under different water quality conditions and aquaculture stages, which can ensure the filtration effect and reduce energy consumption. Water baffles are provided on both sides of the drum, which can effectively prevent sewage and impurities from flying out of the drum and polluting the filtered water. The whole device has a simple structure and is easy to clean and maintain. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of this utility model (left view).

[0021] Figure 4 This is a schematic diagram (front view) of the structure of this utility model.

[0022] The components include: 1. Shell; 2. Roller; 3. Filter screen; 4. Sludge collection tank; 5. Water inlet pipe; 6. Non-powered roller; 7. Powered roller; 8. Fixing base; 9. Wheel baffle; 10. Motor; 11. Sludge collection tank; 12. Sludge discharge pipe; 13. Backwash cleaning pipe; 14. Nozzle; 15. Fixing plate; 16. Clean water collection port; 17. Water baffle. Detailed Implementation

[0023] The present invention will now be further described in conjunction with specific embodiments and accompanying drawings.

[0024] like Figures 1-4 As shown, this utility model discloses an electric roller filter device for aquaculture, including a housing 1, a drive component, a roller 2, a filter screen 3, a sludge collection tank 4, a water inlet pipe 5, and a backwashing device. The bottom of the housing 1 is provided with a clean water collection port 16. The drive component mainly consists of a motor 10, three non-powered rollers 6 and one powered roller 7. The motor 10 is located outside the housing 1, and the three non-powered rollers 6 and one powered roller 7 are located inside the housing 1. The bottom inner side of the housing 1 is provided with a fixing seat 8. The three non-powered rollers 6 and one powered roller 7 are fixed on the fixing seat 8 in a square position. The roller 2 is also located inside the housing 1, and wheel baffles 9 are provided on the outer periphery of its two ends. The three non-powered rollers 6 and one powered roller 7 are rotatably connected to the wheel baffles 9. The motor 10 drives the powered roller 7 to rotate, which drives the non-powered rollers 6 connected to it to rotate, which in turn drives the roller 2 to rotate, and then drives the other two non-powered rollers 6 to rotate as well.

[0025] The roller 2 has several filter holes (not shown in the figure). The filter screen 3 is fixed to the outer periphery of the roller 2 by the fixing plate 15. One end of the water inlet pipe is connected to the pressurized water pump (not shown in the figure), and the other end passes through the housing 1 and extends into the roller 2. The sludge collection tank 11 passes horizontally through the housing 1 and enters the inside of the roller 2, and extends out to the other side of the housing 1, and is connected to the drain pipe 12 placed outside the housing 1. The drain pipe 12 is set vertically.

[0026] The backwashing device consists of a pressurized water pump, a backwashing pipe 13, and six nozzles 14. The pressurized water pump is located outside the housing 1. The backwashing pipe 13 is connected to the pressurized water pump and extends into the housing 1, directly above the sludge collection tank 11. Six nozzles 14 are connected to the backwashing pipe 13 directly above the sludge collection tank 11.

[0027] The ends of the left and right sides of the roller 2 are not sealed. At the ends of the left and right sides of the roller 2, a water baffle 17 is provided along its periphery to prevent liquid or impurities inside the roller 2 from flowing out of the roller.

[0028] In this invention, the roller 2 is the core component of the device. It is mostly cylindrical in shape and is usually made of food-grade plastic, stainless steel, etc. It has good corrosion resistance and sealing properties to adapt to the aquaculture environment.

[0029] The filter screen 3 covers the outside of the drum 2. It is made of 316L stainless steel with a pore size of no more than 38μm and features corrosion resistance, high strength, and high filtration accuracy. The pore size of the filter screen 3 is determined according to filtration requirements, and it can effectively intercept waste such as uneaten feed, feces, and algae in aquaculture water, achieving solid-liquid separation.

[0030] The power roller 7 can be connected to the motor 10 via gears, belts, or direct connection. The motor 10 provides power to drive the roller, causing the drum 2 to rotate. The motor 10 is typically a waterproof and explosion-proof motor to ensure safe and reliable operation in humid aquaculture environments.

[0031] The pressurized water pump is located outside the housing 1 and is used to provide the pressure required for filtration and backwashing. During the filtration process, the pressurized water pump draws the water to be filtered into the drum 2, so that the water passes through the filter screen 3 under pressure; during the backwashing process, the pressurized water pump delivers high-pressure water to the nozzle 14 to rinse the filter screen 3 and remove dirt from the filter screen 3.

[0032] The sludge collection tank 4 is located inside and above the drum 2, and is used to collect the sludge trapped by the filter screen 3 during the filtration process. The design of the sludge collection tank 4 should facilitate the collection and discharge of sludge to avoid its accumulation inside the filter and affecting the filtration effect. The drain pipe 12 is connected to the sludge collection tank 4 to discharge the collected sludge from the filtration device for centralized treatment. The diameter and material of the drain pipe 12 should be selected according to the nature and discharge volume of the sludge to ensure smooth discharge.

[0033] In this actual operation, the motor 10 controls the drum 2 to rotate in the forward direction. The water to be filtered is pumped into the inlet pipe 5 by the pressurized water pump. After the water is thrown out through the filter screen 3, it flows out into the clean water collection port 16 at the bottom of the housing 1. When there is a lot of dirt on the filter screen 3, the inlet pipe 5 stops the water supply, the motor 10 controls the drum 2 to rotate in the reverse direction, and the pressurized water pump delivers clean high-pressure water to the nozzle 14 to wash the dirt adsorbed on the filter screen 3 into the dirt collection tank 11 directly below. At the same time, the dirt is washed from one end of the dirt collection tank 11 with a high-pressure water gun and flushed into the drain pipe 12 at the other end of the dirt collection tank 11 for unified treatment.

[0034] In this invention, users can install a control box outside the housing according to their needs, serving as the control center for the filtration device. This control box can control the start and stop of equipment such as motors and booster pumps, enabling automatic operation of the filtration device. The control box typically contains electrical components such as leakage protection switches, relays, and contactors to ensure safe operation of the equipment. This content is not within the scope of protection of this invention and is already publicly available technology; therefore, it will not be described in detail here.

Claims

1. An electric drum filter device for aquaculture, characterized in that: The device includes a housing, a drive unit, a drum, a filter screen, a sludge collection tank, a water inlet pipe, and a backwash cleaning device. The bottom of the housing has a clean water collection port. The drum is located inside the housing, and the drum wall has several filter holes. The filter screen is fixed to the outside of the drum. The drive unit controls the rotation of the drum. The water inlet pipe passes through the housing and extends into the drum. The sludge collection tank passes horizontally through the inside of the drum, and its other end is connected to the drain pipe, which is located outside the housing. The backwash cleaning device is fixed inside the housing, outside the drum, and directly above the sludge collection tank.

2. The electric drum filter device for aquaculture according to claim 1, characterized in that: The left and right sides of the roller are not sealed. At the ends of the left and right sides of the roller, a water baffle is fixed around its perimeter to prevent liquid inside the roller from flowing out.

3. The electric drum filter device for aquaculture according to claim 1, characterized in that: The drive unit includes a motor, three unpowered rollers, and one powered roller. The motor is located outside the housing, and a fixed base is provided on the bottom inner side of the housing. The three unpowered rollers and one powered roller are fixed on the fixed base in a square position. Wheel baffles are provided on the outer periphery of the left and right sides of the roller. The three unpowered rollers and one powered roller are rotatably connected to the wheel baffles. The motor drives the powered roller to rotate, which in turn drives the unpowered rollers connected to it to rotate, which in turn drives the roller to rotate, and then drives the other two unpowered rollers to rotate as well. The speed of the roller is adjustable.

4. The electric drum filter device for aquaculture according to claim 1, characterized in that: The two ends of the sludge collection tank extend out of the housing, and the bottom of one end is connected to the drain pipe, which is set vertically.

5. The electric drum filter device for aquaculture according to claim 1, characterized in that: The backwashing device includes a pressurized water pump, a backwashing pipe, and nozzles. The pressurized water pump is located outside the housing. The backwashing pipe is connected to the pressurized water pump and extends into the housing, directly above the sludge collection tank. One or more nozzles are connected to the backwashing pipe directly above the sludge collection tank.

6. The electric drum filter device for aquaculture according to claim 1, characterized in that: The filter screen has a pore size of no more than 38μm, and both ends of the filter screen are fixed to the roller by fixing plates.

7. The electric drum filter device for aquaculture according to claim 5, characterized in that: The booster pump is also connected to the inlet pipe.

Images