Self-cleaning sugarcane juice filtering system

Abstract

The utility model discloses a self -cleaning formula sugarcane clear juice filter system, including, a plurality of through pipeline parallel connection's automatic scraping brush filter unit, and the feed inlet of automatic scraping brush filter unit is connected through the multi -way valve material jar, cleaning acid jar, water jar and gas jar respectively, the sewage outlet, exhaust port, discharge port of automatic scraping brush filter unit are connected through the multi -way valve communication curved sieve, cleaning acid jar and decalcification system, the combination opening and closing of feed inlet, discharge port, sewage outlet and exhaust port on automatic scraping brush filter unit, form different working pipeline, and the whole system passes through the link of gas top liquid pipeline, and the mixture of insulating material liquid, acid liquid, water makes a plurality of automatic scraping brush filter unit simultaneously alternate work and self -cleaning between different working pipeline, realizes the production continuous uninterrupted of sugarcane clear juice filter process, and the system of the present application can realize efficient, automatic operation, need not personnel to dismantle and wash, and the closed pressure filtration ensures the energy -conserving and high -precision filtration effect.

Description

Technical Field

[0001] This utility model relates to the field of filtration system technology, specifically to a self-cleaning sugarcane juice filtration system. Background Technology

[0002] In the sugarcane sugar production process, sugarcane juice is mainly the clear liquid obtained after the sugarcane juice has undergone sedimentation treatment. Sugarcane juice often contains impurities such as bagasse, scum, filter mud, rust, and scale, and also has a high content of calcium and magnesium ions. Currently, the filtration of sugarcane juice mainly adopts an open curved screen with nylon silk filter cloth. This method is atmospheric pressure filtration, which requires a large filtration area and frequent manual cleaning of impurities on the filter cloth to ensure its filtration performance. Moreover, the open filtration method has problems such as large heat loss, high labor intensity for manual cleaning, and inability to ensure filtration effect. If ordinary filters are used, after a period of operation, the filter screen will be clogged by calcium and magnesium ions in the juice, resulting in insufficient filtration flow.

[0003] In the filtration system with patent number CN216457270U, ​​entitled "A Parallel Filter Component", multiple parallel filter components are set up and a cleaning and reflux unit is provided. However, the system does not consider whether scaling will occur when filtering different liquids. When scaling occurs in the filter components, it is difficult for the liquid inside the filter components to be completely discharged through the outlet. If cleaning is performed directly at this time, it will result in waste of liquid. Similarly, when cleaning the filter components with cleaning fluid, if some cleaning fluid remains in the filter components, it will affect the filtration quality of the liquid. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a self-cleaning sugarcane juice filtration system.

[0005] According to the technical solutions provided in the embodiments of this application, A self-cleaning sugarcane juice filtration system includes multiple automatic scraper filter units connected in parallel via pipelines. The inlets of the multiple parallel automatic scraper filter units are respectively connected to a material tank, a cleaning acid tank, a water tank, and an air tank via multi-way valves. The drain and outlet of the automatic scraper filter units are connected to a curved screen, a cleaning acid tank, and a decalcification system via multi-way valves. When the automatic scraper filter units are working, the inlets and outlets connected to the material tanks are opened simultaneously to form a material filtration pipeline. When the automatic scraper filter units are self-cleaning, the inlets and outlets connected to the air tanks are opened to form an air-to-liquid pipeline. The inlets and outlets connected to the cleaning acid tanks are opened to form a circulating descaling pipeline. The inlets and outlets connected to the water tanks are opened to form a cleaning pipeline. The entire system isolates the mixing of material filtrate, acid, and water through the connection of the air-to-liquid pipelines, allowing multiple automatic scraper filter units to work and self-clean simultaneously and alternately, achieving continuous and uninterrupted production of the sugarcane juice filtration process.

[0006] Furthermore, an exhaust port is provided at the upper part of the automatic scraper filter unit. The exhaust port is connected to the curved screen and the cleaning acid tank through a multi-way valve. When opened, the feed liquid and acid liquid can fill the automatic scraper filter unit, expel excess air in the automatic scraper filter unit, and at the same time, the liquid can fill the automatic scraper filter unit, increasing the unit throughput of liquid in the automatic scraper filter unit.

[0007] Furthermore, the gas-top liquid pipeline includes a gas-top material pipeline, a gas-top acid pipeline, and a gas-top water pipeline.

[0008] Furthermore, the drain outlet of the automatic scraper filter unit is connected to the cleaning acid tank and the curved screen through a multi-way valve, which opens the feed inlet and drain outlet of the gas tank, forming an air-top material pipeline, an air-top acid pipeline, and an air-top water pipeline.

[0009] Furthermore, the discharge port of the automatic scraper filter unit is connected to the decalcification system via an electronic switch valve, allowing it to proceed to the next production process.

[0010] Furthermore, the automatic scraping filter unit is equipped with a motor-driven stainless steel brush that rotates and cleans the inner wall of the filter screen, and the flow rate is monitored in real time by a PLC controller to achieve automatic cleaning of the automatic scraping filter unit.

[0011] In summary, the beneficial effects of this application are as follows: This application has the following advantages: 1. This application adopts a system architecture in which multiple automatic scraper filter units are connected in parallel and can work and clean simultaneously in an alternating manner. This ensures that when any filter unit is being cleaned or maintained, the remaining filter units can still maintain the total processing capacity of the system, realizing continuous and uninterrupted production of sugarcane juice filtration process and greatly improving the filtration efficiency of sugarcane juice. 2. This application addresses the complex composition of sugarcane juice by employing an automatic CIP cleaning system. The system determines the degree of filter clogging based on the flow rate and then uses the automatic scraping device of the automatic scraping filter unit to automatically clean the filter. Simultaneously, the automatic scraping filter unit is cyclically connected to the acid cleaning tank to achieve self-circulation of the cleaning process. While repeatedly and efficiently rinsing the filter in the automatic scraping filter unit, the acid solution is recycled and reused. 3. This application provides an air tank at the inlet of the parallel automatic scraper filter unit, which can fill the automatic scraper filter unit with high-pressure air, ensuring that the residual liquid in the automatic scraper filter unit is discharged. The residual liquid includes feed liquid, acid liquid, and water, and the possibility of mixing of feed liquid, acid liquid and water is prevented. This does not affect its self-cleaning and the filtration quality of the feed liquid after cleaning, and also prevents the waste of feed liquid. 4. Based on the self-circulation of the automatic scraper filter unit, this application provides an exhaust port on the automatic scraper filter unit, which can ensure that the liquid and acid fill the entire automatic scraper filter unit, increase the filtration volume of the liquid per unit time and the acid washing area inside the filter unit, that is, improve the filtration efficiency and acid washing efficiency of the liquid, so as to make efficient use of the automatic scraper filter unit. 5. The system of this application can achieve efficient and automatic operation, without the need for personnel to disassemble and clean it, and the closed pressurized filtration ensures energy saving and high-precision filtration effect. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the connection structure of the entire filtration system in this application; Figure 2 This is a front cross-sectional view of the automatic scraping filter unit of this application.

[0013] The diagram shows the following labels: Automatic scraper filter unit-1; feed inlet-11; drain outlet-12; exhaust outlet-13; and discharge outlet-14. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] A self-cleaning sugarcane juice filtration system, such as Figure 1 As shown, N automatic scraper filter units 1 are connected in parallel through pipes, where N≥2, and... Figure 1 The image shows four automatic scraping filter units 1; like Figure 1 and Figure 2 It can be seen that the feed inlet 11 of the automatic scraper filter unit 1 is connected to the material tank, the cleaning acid tank, the water tank and the gas tank through a multi-way valve; The drain port 12 of the automatic scraper filter unit 1 is connected to the curved screen and the cleaning acid tank through a multi-way valve; The exhaust port 13 of the automatic scraper filter unit 1 is connected to the curved screen and the cleaning acid tank through a multi-way valve. The exhaust port 13 is located at the upper part of the automatic scraper filter unit 1. The discharge port 14 of the automatic scraper filter unit 1 is directly connected to the next process - the decalcification system - via an electronic switch valve; Depend on Figure 2 It is known that the automatic scraping filter unit 1 has a stainless steel filter screen inside, and a scraper plate inside the stainless steel filter screen to scrape the inner wall of the stainless steel filter screen. The scraper plate rotates inside the stainless steel filter screen via a motor located on the upper surface of the automatic scraping filter unit 1. Figure 2 The "M" designation indicates the motor type. from Figure 2 It can be seen that the feed inlet 11 of the automatic scraper filter unit 1 can be directly equipped with a five-way valve. For clear display, the five-way valve is disassembled and displayed separately. Similarly, the multi-way valve set at the drain outlet 12 is a three-way valve, and the multi-way valve set at the exhaust outlet 13 is a three-way valve. As can be clearly seen from the figure, the discharge port 14 is connected to the inside of the stainless steel filter screen.

[0017] Work steps: 1. For example Figure 1 As shown, the initial state of the system is that automatic scraper filter units 1#, 2#, and 3# are in operation, while automatic scraper filter unit 1# is in standby mode. Simultaneously, the system PLC continuously monitors the discharge flow of the three filter units. At this time, the inlet 11 connecting automatic scraper filter units 1#, 2#, and 3# to the material tank and the outlet 14 connecting to the decalcification system are all open, forming a liquid filtration pipeline when filter units 1#, 2#, and 3# are working. All multi-way valves on automatic scraper filter unit 1# are closed. When filter units 1#, 2#, and 3# are working, the valves on the exhaust ports 13 of filter units 1#, 2#, and 3# must first be opened to ensure the liquid fills the entire filter unit. Then, exhaust ports 13 are closed, and the outlet 14 connecting to the decalcification system is opened to form a stable liquid filtration pipeline. 2. Flow Rate Decrease and Stepped Shutdown Judgment: When the PLC detects through the flow meter that the discharge flow rate of one of the operating automatic scraper filter units 1 (e.g., 1#) is continuously lower than the first set threshold (e.g., 70 m³ / h, which is 70% of the normal flow rate of 100 m³ / h), the PLC automatically closes the valves on the inlet 11 and outlet 14 of the filter unit (1#) that needs cleaning, shutting it out of the system for cleaning. Subsequently, the PLC automatically opens the inlet 11 of the standby filter unit (4#) connected to the tank and the outlet 14 connected to the decalcification system, putting it into operation. When the flow rate of filter #2 further decreases to the second set threshold (e.g., 60 m³ / h, which is 60% of the normal flow rate), the PLC determines that the filter screen is clogged and needs to be shut out for cleaning. Subsequently, when the PLC detects through the flow meter that the discharge flow rate of one of the operating filters is consistently lower than the set third threshold (e.g., from an average flow rate of 100 m³ / h per filter to 50 m³ / h), it determines that the filter screen is clogged and needs cleaning. (The above thresholds can be set according to requirements). 3. Automatic Descaling and Cleaning Program: Standardized automatic cleaning and descaling control steps are performed on the isolated filter unit (1#): (1) Discharge (air-pumped material pipeline): Open the valve on the feed port 11 connected to the air tank and the valve on the drain port 12 connected to the curved screen. Use gas to pressurize the residual clear juice inside the filter to the curved screen for recycling. After the set time is over, close the relevant valves.

[0018] (2) Circulating descaling (circulating descaling pipeline): Open the valves connected to the cleaning acid tank at the inlet 11, the drain 12, and the exhaust 13. The valve at the exhaust 13 closes after a set time (e.g., after 2-3 minutes) to vent the gas from the filter unit, allowing the acid to fill the entire filter unit. Any overflow will also be discharged from here. The acid enters the filter screen from the outer wall, rinsing it. The rinsed acid will be discharged from the drain 12 and then circulated back to the cleaning acid tank by a circulating pump. This process is repeated to circulate the acid and dissolve calcium and magnesium salt deposits in the filter. The set time is controlled (ending after 15-20 minutes). After completion, the relevant valves are closed. Note: The acid in the cleaning acid tank can be replaced when the pH reaches the set value. If the pH reaches a certain set value, it indicates that the acid in the cleaning acid tank is no longer able to dissolve the calcium and magnesium salt deposits and needs to be replaced.

[0019] (3) Gas-top acid (gas-top acid pipeline): Open the valve on the feed port 11 connected to the gas tank and the valve on the drain port 12 that returns to the cleaning acid tank, and use high-pressure gas to discharge the waste acid liquid in the filter unit to the cleaning acid tank. Close the valve after the set time.

[0020] (4) Water washing filter unit (cleaning pipeline): Open the valve connecting the feed port 11 to the water tank and the valve on the drain port 12 that returns to the cleaning acid tank, so that water enters the filter unit to wash the filter unit and rinse away residual acid. Set the time control and close the relevant valves after the time is up.

[0021] (5) Air-to-water (air-to-water pipeline): Open the valve on the feed port 11 connected to the air tank and the valve on the drain port 12 connected to the cleaning acid tank, and use gas to press the small amount of residual water inside into the dilute acid cleaning tank. Set the time control, and close the relevant valves after the time is up.

[0022] (6) Preparation: At this point, the descaling process is complete, the filter unit is cleaned and ready for use.

[0023] (7) Feed filtration (liquid filtration pipeline): Open the valve on the feed port 11 connected to the tank, the switch valve on the discharge port 14, and the valve on the exhaust port 13 connected to the curved screen. The valve on the exhaust port is closed according to the set time (e.g., after 3 minutes) to empty the gas in the filtration unit so that the liquid fills the entire filtration unit.

[0024] Although the working principle of the automatic scraper filter unit 1 is the same as that of the automatic brush filter, both of which have a stainless steel filter screen installed inside the housing and a scraper plate rotated by a motor inside the stainless steel filter screen for scraping the inner wall of the stainless steel filter screen, the automatic scraper filter unit 1 mentioned in this solution is equipped with an exhaust port. The purpose is to ensure that the feed liquid and cleaning acid can fill the entire filter unit. When the feed liquid fills the entire automatic scraper filter unit 1 and the valve of the discharge port 14 is opened, the entire stainless steel filter screen can filter the feed liquid at the same time, increasing the filtration rate of the feed liquid per unit time. When the cleaning acid fills the entire automatic scraper filter unit 1 and the valve on the drain port 12 connected to the cleaning acid tank is opened, the cleaning acid can simultaneously flush and descale the entire stainless steel filter screen when rinsing the automatic scraper filter unit 1, which is complete and efficient. The air-liquid pipeline of the entire system is mainly used to isolate the feed liquid, acid, and water.

[0025] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and solutions employed. Furthermore, the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A self-cleaning sugarcane juice filtration system, characterized in that: include, Multiple automatic scraper filter units connected in parallel via pipes (1). The feed inlets (11) of the multiple parallel automatic scraper filter units (1) are respectively connected to the material tank, the cleaning acid tank, the water tank and the gas tank through multi-way valves; the drain outlet (12) and the discharge outlet (14) of the automatic scraper filter units (1) are connected to the curved screen, the cleaning acid tank and the decalcification system through multi-way valves. When the automatic scraper filter unit (1) is working, the feed inlet (11) and the discharge outlet (14) connected to the tank are opened simultaneously to form a liquid filtration pipeline. When the automatic scraper filter unit (1) is self-cleaning, the opening of the feed inlet (11) and the drain outlet (12) connected to the gas tank forms an air-liquid pipeline; the opening of the feed inlet (11) and the drain outlet (12) connected to the cleaning acid tank forms a circulating descaling pipeline; the opening of the feed inlet (11) and the drain outlet (12) connected to the water tank forms a cleaning pipeline. The entire system is isolated from the mixing of liquid, acid and water through the connection of the air-top liquid pipeline, so that multiple automatic scraper filter units (1) can work alternately and self-clean at the same time, so as to realize the continuous and uninterrupted production of sugarcane juice filtration process.

2. The self-cleaning sugarcane juice filtration system according to claim 1, characterized in that: The automatic scraper filter unit (1) has an exhaust port (13) at its upper end. The exhaust port (13) is connected to the curved screen and the cleaning acid tank through a multi-way valve. When opened, the material liquid and acid liquid can fill the automatic scraper filter unit (1).

3. The self-cleaning sugarcane juice filtration system according to claim 1, characterized in that: The gas-top liquid pipeline includes the gas-top material pipeline, the gas-top acid pipeline, and the gas-top water pipeline.

4. The self-cleaning sugarcane juice filtration system according to claim 3, characterized in that: The drain port (12) of the automatic scraper filter unit (1) is connected to the cleaning acid tank and the curved screen through a multi-way valve, so that the opening of the feed port (11) and the drain port (12) connected to the gas tank forms the gas-top material pipeline, the gas-top acid pipeline and the gas-top water pipeline.

5. The self-cleaning sugarcane juice filtration system according to claim 1, characterized in that: The discharge port (14) of the automatic scraper filter unit (1) is connected to the decalcification system through an electronic switch valve and enters the next production process.

6. The self-cleaning sugarcane juice filtration system according to claim 1, characterized in that: The automatic scraping filter unit (1) is equipped with a motor-driven stainless steel brush that rotates and cleans the inner wall of the filter screen, and the flow rate is monitored in real time by a PLC controller.

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