Duplex filter for filtering egg liquid

Abstract

The utility model discloses a duplex filter for filtering egg liquid, and relates to the technical field of egg liquid filtering. Comprising filter cavities, a feed port, a heater, a refrigerator, a discharge port, a drain outlet, a filter element assembly, a filter element support, a drain outlet channel, a spraying device, a backwashing device, a differential pressure sensor, a temperature sensor, a feed pipeline, a switching valve and an ultraviolet germicidal lamp. The first filtering cavity is used for filtering eggs, the second filtering cavity is used for backwashing or standby, the problem that a traditional single-cavity filter needs to be shut down when being cleaned or maintained is avoided, then through graded filtration and high-precision purification of multiple layers of filter elements, and through the three-stage filter elements of 100-200 microns, 5-10 microns and 0.1-0.5 microns, impurities with different particle sizes are intercepted stage by stage, the high cleanliness of egg liquid is ensured, and the egg liquid is purified and purified by the three-stage filter elements of 100-200 microns, 5-10 microns and 0.1-0.5 microns. And the interior and exterior of the filter element are covered by a collaborative cleaning mode of the backwashing device and the spraying device, so that the cleaning effect is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of egg liquid filtration technology, specifically a dual filter for egg liquid filtration. Background Technology

[0002] In the food processing industry, egg liquid is widely used as an important raw material in baking, dairy products, and pre-prepared foods. Before processing, egg liquid requires strict filtration to remove eggshell fragments, membrane impurities, and microbial contaminants, ensuring product hygiene, safety, and quality stability. Traditional egg liquid filtration equipment often uses a single-chamber structure, with the filter element integrated into a single filtration chamber. However, cleaning or maintenance of the filter element in a single chamber requires interrupting the filtration process, leading to production line downtime and severely impacting production continuity and efficiency. This is especially significant in large-scale industrial production, where downtime results in substantial economic losses. To address these issues, existing technology includes a dual-stage filter that allows one filtration chamber to be in filtration mode while the other is in backwashing or standby mode, achieving continuous filtration, such as CN103801144A. A dual-stage switching filter includes a single-cylinder filter, wherein the single-cylinder filter includes an inlet and an outlet; the dual-stage switching filter consists of two single-cylinder filters, the inlets of the two single-cylinder filters are connected by a pipe, and the outlets of the two single-cylinder filters are connected by a pipe; a three-way valve is provided on the connecting pipe between the inlets of the two single-cylinder filters; a three-way valve is provided on the connecting pipe between the outlets of the two single-cylinder filters.

[0003] However, this technical solution relies on manual experience or fixed-cycle filter maintenance, making it impossible to monitor the degree of filter clogging in real time. Early-stage clogging is difficult to detect, and cleaning is only implemented when filtration efficiency significantly decreases, easily causing fluctuations in egg liquid processing quality and even batch-related hygiene issues. Furthermore, traditional backwashing systems often use a unidirectional flushing mode, limiting the flushing range and making it difficult to thoroughly remove deep-seated blockages and surface impurities from the filter. In addition, insufficient precision in flushing pressure and flow control can easily lead to filter damage or cleaning solution residue, affecting the quality of subsequent egg liquid processing. Summary of the Invention

[0004] The purpose of this invention is to provide a dual filter for filtering egg liquid, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-stage filter for filtering egg liquid, comprising: two identical filter chambers, namely a first filter chamber and a second filter chamber; an inlet is provided at the center of the top of each filter chamber; a heater and a cooler are provided in the middle of the outer sidewall; an outlet is provided at the lower part of the outer sidewall; and a drain outlet is provided at the bottom. A filter element assembly is provided inside each filter chamber, and the filter element assembly is fixed to the inner wall of the filter chamber by a filter element bracket. A gap is left between the filter element assembly and the inner wall of the filter chamber to form a drain channel. A spray device is provided above the filter element assembly and fixed to the filter chamber. On the top wall of the filter chamber, the bottom of the filter element assembly is connected to a backwashing device. The filter element assembly includes a filter element assembly housing. Multiple filter elements are arranged in the middle of the filter element assembly housing. A differential pressure sensor and a temperature sensor are respectively arranged above and below the multiple filter elements. The bottom of the filter element assembly housing is provided with a liquid outlet pipe connected to the discharge port. The top of the first filter chamber and the second filter chamber are connected to a feed pipe. A switching valve is provided on the feed pipe. The outside of the filter chamber is provided with a control cabinet that is electrically connected to the heater, cooler, spray device, backwashing device, differential pressure sensor, temperature sensor and switching valve.

[0006] Furthermore, the spraying device includes: a spray liquid storage tank is provided outside the filter chamber, a spray liquid pipe is provided on the spray liquid storage tank, a spray liquid high-pressure pump is provided on the spray liquid pipe near the spray liquid storage tank, a spray liquid solenoid valve is provided on the spray liquid high-pressure pump, the other end of the spray liquid pipe enters the interior of the filter chamber, and a spray nozzle is connected to the end of the pipe, and the spray nozzle is fixed on the top wall of the filter chamber.

[0007] Furthermore, the backwashing device includes: a cleaning fluid storage tank outside the filter chamber, a backwashing pipe on the cleaning fluid storage tank, a high-pressure cleaning fluid pump on the backwashing pipe near the cleaning fluid storage tank, a cleaning fluid solenoid valve on the high-pressure cleaning fluid pump, the other end of the backwashing pipe leading into the filter chamber and connected to a backwashing nozzle at the end, and the backwashing nozzle leading into the bottom of the filter element assembly.

[0008] Furthermore, the multi-layer filter element 702 includes three filter elements arranged sequentially from top to bottom. The pore sizes of the three filter elements decrease sequentially: the first-stage filter element 7021 has a pore size of 100-200 μm, the second-stage filter element 7022 has a pore size of 5-10 μm, and the third-stage filter element 7023 has a pore size of 0.1-0.5 μm. The first-stage filter element 7021 is inclined at an angle of 20°-30°.

[0009] Furthermore, the liquid outlet pipe is equipped with an ultraviolet germicidal lamp.

[0010] Preferably, the feeding pipe includes a main feeding pipe, a first feeding pipe connected to the feeding port on the first filter chamber, and a second feeding pipe connected to the feeding port on the second filter chamber. The switching valve is located at the intersection of the main feeding pipe, the first feeding pipe, and the second feeding pipe.

[0011] Compared with existing technologies, the advantages of this invention are as follows: This invention utilizes two independent filtration chambers, allowing the second chamber to backwash or standby while the first chamber is filtering. This avoids the problem of traditional single-chamber filters requiring shutdown for cleaning or maintenance, significantly improving production efficiency. The automated coordination of the switching valves and control cabinet ensures seamless connection in the egg liquid filtration process. Furthermore, the alternating operation and maintenance of the two chambers reduces the continuous load on a single chamber, lowering equipment wear. Multi-layer filter cartridges provide high-precision purification with three filter stages: 100-200μm, 5-10μm, and 0.1-0.5μm, progressively intercepting impurities of different particle sizes to ensure the high purity of the egg liquid. The filter meets food-grade filtration standards, and the primary filter element is tilted at 20°-30° to allow larger particles to slide quickly into the drain channel using gravity, reducing the accumulation of impurities on the filter element surface and lowering the risk of clogging. A differential pressure sensor dynamically monitors the filter element for clogging and triggers the cleaning program in a timely manner to prevent a decrease in filtration efficiency. Then, a backwashing device removes clogging from the bottom of the filter element, and a spray device sprays cleaning fluid from the top to wash away residual impurities on the filter element surface. This synergistic cleaning mode covers both the inside and outside of the filter element, significantly improving the cleaning effect. Finally, the entire process of filtration, cleaning, and switching is automated through a control cabinet, reducing the need for manual operation and lowering labor costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the filter cavity structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the filter element assembly structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the feed pipe structure of this utility model;

[0016] In the diagram: 1. Filter chamber; 101. First filter chamber; 102. Second filter chamber; 2. Inlet; 3. Heater; 4. Refrigerator; 5. Outlet; 6. Drain; 7. Filter element assembly; 701. Filter element assembly housing; 702. Multi-layer filter element; 7021. Primary filter element; 7022. Secondary filter element; 7023. Tertiary filter element; 703. Liquid outlet pipe; 8. Filter element support; 9. Drainage channel; 10. Spraying device; 1001. Spray liquid storage tank; 1002. Spray liquid pipe; 1003. Spraying... 1004. High-pressure pump for cleaning fluid; 1005. Solenoid valve for spray fluid; 11. Spray shower head; 12. Backwashing device; 13. Cleaning fluid storage tank; 14. Backwashing pipe; 15. High-pressure pump for cleaning fluid; 16. Solenoid valve for cleaning fluid; 17. Backwashing nozzle; 18. Differential pressure sensor; 19. Temperature sensor; 20. Feed pipe; 21. Main feed pipe; 22. First feed pipe; 33. Second feed pipe; 44. Switching valve; 55. Control cabinet; 66. Ultraviolet germicidal lamp. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0018] Please refer to Figure 1-4 This utility model provides a dual filter for filtering egg liquid, comprising: two identical filter chambers 1, namely a first filter chamber 101 and a second filter chamber 102. Each filter chamber 1 has an inlet 2 at the center of its top, a heater 3 and a cooler 4 in the middle of its outer sidewall, an outlet 5 at the bottom of its outer sidewall, and a drain 6 at its bottom. A filter element assembly 7 is installed inside each filter chamber 1. The filter element assembly 7 is fixed to the inner wall of the filter chamber 1 by a filter element bracket 8. A gap is left between the filter element assembly 7 and the inner wall of the filter chamber 1 to form a drain channel 9. A spray device 10 is fixed to the top wall of the filter chamber 1 above the filter element assembly 7. A backwashing device is connected to the bottom of the filter element assembly 7. The filter element assembly 7 includes a filter element assembly housing 701. Multiple filter elements 702 are disposed in the middle of the filter element assembly housing 701. A differential pressure sensor 12 and a temperature sensor 13 are respectively disposed above and below the multiple filter elements 702. A liquid outlet pipe 703 is disposed at the bottom of the filter element assembly housing 701 and connected to a discharge port 5. A feed pipe 14 is connected to the top of the first filter chamber 101 and the second filter chamber 102. A switching valve 15 is disposed on the feed pipe 14. A control cabinet 16 is disposed outside the filter chamber 1 and is electrically connected to a heater 3, a cooler 4, a spray device 10, a backwash device 11, a differential pressure sensor 12, a temperature sensor 13, and a switching valve 15.

[0019] The system utilizes two independent filter chambers 1, allowing for switching between them. When the first filter chamber 101 is filtering, the second filter chamber 102 is either backwashed or in standby mode. This avoids the need to shut down traditional single-chamber filters during cleaning or maintenance. The automated coordination between the switching valve 15 and the control cabinet 16 ensures seamless connection of the egg liquid filtration process. The differential pressure sensor 12 dynamically monitors the pressure difference between the top and bottom of the multi-layer filter element 702 to determine the blockage status of the filter element 702 and promptly trigger the cleaning program to prevent a decrease in filtration efficiency. The temperature sensor 13 monitors the temperature of the filtered liquid in real time and precisely controls the filtration temperature through the heater 3 and the cooler 4 to prevent the egg liquid from deteriorating due to temperature fluctuations and ensure consistent product quality. The backwashing device 11 then flushes the filter element assembly 7 from the bottom up to remove blockages, while the spray device 10 sprays cleaning fluid from the top to rinse away residual impurities on the surface of the filter element assembly 7. This synergistic cleaning mode covers both the inside and outside of the filter element, significantly improving the cleaning effect. Finally, the control cabinet 16 automates the entire process of filtration, cleaning, and switching, enabling unmanned operation and reducing the need for manual operation and labor costs.

[0020] The spraying device 10 includes: a spray liquid storage tank 1001 outside the filter chamber 1; a spray liquid pipe 1002 on the spray liquid storage tank 1001; a spray liquid high-pressure pump 1003 on the spray liquid pipe 1002 near the spray liquid storage tank 1001; a spray liquid solenoid valve 1004 on the spray liquid high-pressure pump 1003; the other end of the spray liquid pipe 1002 enters the interior of the filter chamber 1, and a spray shower head 1005 is connected to the end of the pipe; the spray shower head 1005 is fixed on the top wall of the filter chamber 1.

[0021] The spray liquid high-pressure pump 1003 and the spray liquid solenoid valve 1004 are electrically connected to the control cabinet 16. The spray liquid in the spray liquid storage tank 1001 is injected into the spray pipe 1002 through the spray liquid high-pressure pump 1003 and the spray liquid solenoid valve 1004. The spray liquid is evenly sprayed on the surface of the filter element assembly 7 through the spray nozzle 1005 to further clean the filter element.

[0022] The backwashing device 11 includes: a cleaning fluid storage tank 1101 outside the filter chamber 1; a backwashing pipe 1102 on the cleaning fluid storage tank 1101; a cleaning fluid high-pressure pump 1103 on the backwashing pipe 1102 near the cleaning fluid storage tank 1101; a cleaning fluid solenoid valve 1104 on the cleaning fluid high-pressure pump 1103; the other end of the backwashing pipe 1102 leads into the interior of the filter chamber 1, and the end is connected to a backwashing nozzle 1105; the backwashing nozzle 1105 leads into the bottom of the filter element assembly 7.

[0023] When the differential pressure sensor 12 detects that the filter element is clogged and the differential pressure is too large, the control cabinet 16 starts the backwashing program. The cleaning fluid in the cleaning fluid storage tank 1101 is injected into the backwashing pipe 1102 through the cleaning fluid high-pressure pump 1103 and the cleaning fluid solenoid valve 1104. The cleaning fluid is sprayed upward from the bottom of the filter element assembly 7 through the backwashing nozzle 1105 to remove the blockage on the filter element.

[0024] The multi-layer filter element 702 includes three filter elements arranged sequentially from top to bottom. The pore sizes of the three filter elements decrease sequentially: the first-stage filter element 7021 has a pore size of 100-200um, the second-stage filter element 7022 has a pore size of 5-10um, and the third-stage filter element 7023 has a pore size of 0.1-0.5um. The first-stage filter element 7021 is inclined at an angle of 20°-30°, which allows larger particles of impurities to slide quickly into the sewage discharge channel by gravity, reducing the accumulation of impurities on the filter element surface and lowering the risk of clogging.

[0025] The liquid outlet pipe 703 is equipped with an ultraviolet germicidal lamp 17 to sterilize the filtered egg liquid and ensure hygiene and safety.

[0026] The feed pipe 14 includes a main feed pipe 1401, a first feed pipe 1402 connected to the feed inlet 2 on the first filter chamber 101, and a second feed pipe 1403 connected to the feed inlet 2 on the second filter chamber 102. The switching valve 15 is located at the intersection of the main feed pipe 1401, the first feed pipe 1402, and the second feed pipe 1403.

[0027] When using this invention, the egg liquid enters the feed pipe 14, and the switching valve 15 controls the flow of the egg liquid to the first filter chamber 101 or the second filter chamber 102. When one filter chamber is in the filtration state, the other filter chamber can be in the backwashing or standby state to achieve continuous filtration. The egg liquid enters the filter chamber 1 through the feed port 2 and is evenly distributed above the filter element assembly 7. The egg liquid passes through multiple filter elements 702 in sequence, including the primary filter element 7021, the secondary filter element 7022, and the tertiary filter element 7023. The primary filter element 7021 is inclined to initially filter larger particles such as eggshells. At the same time, the inclined design helps impurities slide down to the drain. The primary filter element 7021 is inclined to initially filter larger particles of impurities, and the inclined design helps impurities slide into the drain channel 9. The secondary filter element 7022 and the tertiary filter element 7023 further filter fine particles to ensure the purity of the egg liquid. The heater 3 or the cooler 4 adjusts the temperature inside the filter chamber based on the feedback from the temperature sensor 13 to ensure that the egg liquid is filtered at the optimal temperature. The differential pressure sensor 12 monitors the pressure difference between the upper and lower parts of the filter element assembly 7 in real time. When the pressure difference exceeds the set value, the backwashing procedure is triggered. The filtered egg liquid flows out through the liquid outlet pipe 703 at the bottom of the filter element assembly housing 701. The liquid outlet pipe 703 is equipped with an ultraviolet light source. The germicidal lamp 17 sterilizes the filtered egg liquid to ensure hygiene and safety. The egg liquid is finally discharged through the outlet 5 and enters the next process. During the filtration process, impurities intercepted by the filter element slide down to the bottom of the filter chamber 1 through the drain channel 9. The impurities are periodically discharged through the drain port 6 to keep the inside of the filter chamber clean. When the differential pressure sensor 12 detects that the filter element is blocked and the differential pressure is too large, the control cabinet 16 starts the backwashing program. The cleaning fluid in the cleaning fluid storage tank 1101 is injected into the backwashing pipe 1102 through the cleaning fluid high-pressure pump 1103 and the cleaning fluid solenoid valve 1104. The cleaning fluid is sprayed upward from the bottom of the filter element assembly 7 through the backwash nozzle 1105. The system sprays water to remove blockages from the filter element. The wastewater from the cleaning process is discharged through the drain channel 9 and drain port 6. During filter chamber switching or periodic maintenance, the control cabinet 16 activates the spray device 10. The spray liquid in the spray liquid storage tank 1001 is injected into the spray pipe 1002 through the spray liquid high-pressure pump 1003 and the spray liquid solenoid valve 1004. The spray liquid is then evenly sprayed onto the surface of the filter element assembly 7 through the spray nozzle 1005, further cleaning the filter element. The cleaned liquid is discharged through the drain channel 9 and drain port 6. When one filter chamber is in backwashing or maintenance mode, the switching valve 15 switches the egg liquid to another filter chamber to ensure continuous filtration. Based on feedback signals from the differential pressure sensor 12, temperature sensor 13, etc., the control cabinet 16 automatically controls the operating status of the heater 3, cooler 4, spray device 10, backwash device 11, and switching valve 15, achieving fully automated operation.

[0028] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A duplex filter for use in egg white filtration, characterized by The utility model relates to a filter device, including: Two structural same filter cavities (1), namely first filter cavity (101) with second filter cavity (102), the filter cavity (1) top center is equipped with feed inlet (2), the middle part of external lateral wall is equipped with heater (3) and refrigerator (4), the lower part of external lateral wall is equipped with discharge outlet (5), bottom is equipped with blowdown (6), the filter cavity (1) inside is equipped with filter core subassembly (7), filter core subassembly (7) is fixed in filter cavity (1) inner wall through filter core support (8), filter core subassembly (7) and filter cavity (1) inner wall leave the gap and form blowdown channel (9), filter core subassembly (7) top is equipped with spray device (10) and is fixed in filter cavity (1) top wall, filter core subassembly (7) bottom is connected backwash device (11), filter core subassembly (7) includes filter core subassembly shell (701), the middle part of filter core subassembly shell (701) inside is equipped with multilayer filter core (702), multilayer filter core (702) top and bottom are equipped with pressure difference sensor (12) and temperature sensor (13) respectively, filter core subassembly shell (701) bottom is equipped with liquid outlet pipeline (703) and is connected with discharge outlet (5), first filter cavity (101) and second filter cavity (102) top are jointly connected with feed pipeline (14), feed pipeline (14) is equipped with switch valve (15), the filter cavity (1) outside is equipped with control cabinet (16) and is electrically connected with heater (3), refrigerator (4), spray device (10), backwash device (11), pressure difference sensor (12), temperature sensor (13) and switch valve (15).

2. The duplex filter for egg liquid filtering use according to claim 1, characterized by, The spray device (10) includes: the filter cavity (1) outside is equipped with spray liquid storage tank (1001), the spray liquid storage tank (1001) is equipped with spray liquid pipeline (1002), the spray liquid pipeline (1002) is equipped with spray liquid high-pressure pump (1003) near the spray liquid storage tank (1001), the spray liquid high-pressure pump (1003) is equipped with spray liquid solenoid valve (1004), the other end of the spray liquid pipeline (1002) is connected with the spray shower (1005) into the filter cavity (1) inside, and the end is fixed on the top wall of the filter cavity (1).

3. The duplex filter for egg liquid filtering use according to claim 2, characterized in that, The backwash device (11) includes: the filter cavity (1) outside is equipped with cleaning liquid storage tank (1101), the cleaning liquid storage tank (1101) is equipped with backwash pipeline (1102), the backwash pipeline (1102) is equipped with cleaning liquid high-pressure pump (1103) near the cleaning liquid storage tank (1101), the cleaning liquid high-pressure pump (1103) is equipped with cleaning liquid solenoid valve (1104), the other end of the backwash pipeline (1102) is connected with the backwash nozzle (1105) into the filter core subassembly (7) bottom.

4. The duplex filter for egg liquid filtering use according to claim 1, characterized by, The multilayer filter element (702) comprises three filter elements arranged in sequence from top to bottom, and the three filter elements have aperture diameters decreasing in sequence, that is, the aperture diameter of the first-stage filter element (7021) is 100-200 um, the aperture diameter of the second-stage filter element (7022) is 5-10 um, and the aperture diameter of the third-stage filter element (7023) is 0.1-0.5 um; the first-stage filter element (7021) is arranged obliquely, and the oblique angle is 20°-30°.

5. The duplex filter for egg liquid filtering use according to claim 4, characterized in that, The liquid outlet pipeline (703) is internally provided with an ultraviolet sterilization lamp (17).

6. The duplex filter for egg liquid filtering use according to claim 5, characterized in that, The feeding pipeline (14) comprises a feeding main pipeline (1401), a first feeding pipeline (1402) connected with the feeding inlet (2) of the first filtering cavity (101), and a second feeding pipeline (1403) connected with the feeding inlet (2) of the second filtering cavity (102); and the switching valve (15) is arranged at the intersection of the feeding main pipeline (1401), the first feeding pipeline (1402) and the second feeding pipeline (1403).

Images