Gravity valveless filter and water circulation equipment

Abstract

The utility model provides a gravity valveless filter and water circulation equipment. The gravity valveless filter comprises a main body (1), an air extractor (2), a flow regulating valve (3) and a turbidity detector (4), a siphon (11) is arranged on the main body (1), the air extractor (2) is connected to the top of the siphon (11), the flow regulating valve (3) is arranged at the power input end of the air extractor (2) and controls power input of the air extractor (2), and the turbidity detector (4) is used for detecting the turbidity of circulating water. The flow regulating valve (3) is linked with the turbidity detector (4), and the opening degree of the flow regulating valve (3) is controlled by the turbidity detected by the turbidity detector (4). According to the gravity valveless filter disclosed by the utility model, the turbidity of circulating water can be accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of water circulation equipment technology, specifically to a gravity valveless filter and a water circulation device. Background Technology

[0002] In recent years, with the development and construction of large-scale coal chemical or petrochemical plants, a large number of supporting circulating water systems have emerged, mainly used in industrial production processes to ensure equipment cooling and meet process requirements. Due to special reasons such as the weather environment in northern regions, open-loop circulating water systems are more widely used. This type of system differs from closed-loop systems in that the water within the system is not in a closed loop but is connected to the external environment. The hot circulating water after use is cooled by heat transfer with the ambient temperature, further cooled by evaporation, and then by forced cooling by fans, bringing the circulating water temperature back to the user's standard. This process is repeated continuously. Simultaneously, the circulating water reduced by evaporation is replenished by introducing fresh water.

[0003] Chemical plants employ a variety of fine heat exchangers, and have stringent requirements for circulating water turbidity parameters. Northern China is rich in coal resources, leading to a particularly thriving coal chemical industry; however, frequent sandstorms significantly impact the circulating water turbidity process parameters.

[0004] During normal operation of the circulating water system, there is no direct logical relationship between the gravity valveless filter and the turbidity of the circulating water. An increase in circulating water turbidity may cause an increase in the pressure differential of the gravity valveless filter. Once a certain pressure differential is reached, automatic backwashing will begin to reduce the turbidity of the circulating water. During this process, the gravity valveless filter has poor sensitivity to changes in circulating water turbidity and cannot achieve precise control of the circulating water turbidity. Utility Model Content

[0005] The main purpose of this invention is to provide a gravity valveless filter and water circulation equipment that can achieve precise control of the turbidity of circulating water.

[0006] To achieve the above objectives, according to one aspect of the present invention, a gravity valveless filter is provided, comprising a main body, an air extraction device, a flow regulating valve, and a turbidity detector. A siphon tube is provided on the main body, the air extraction device is connected to the top of the siphon tube, the flow regulating valve is located at the power input end of the air extraction device and controls the power input of the air extraction device, the turbidity detector is used to detect the turbidity of the circulating water, the flow regulating valve is linked with the turbidity detector, and the opening degree of the flow regulating valve is controlled by the turbidity detected by the turbidity detector.

[0007] Furthermore, the flow regulating valve includes a steam self-regulating valve and a steam line connected to the steam self-regulating valve, the steam line being used to provide steam power to the extraction device.

[0008] Furthermore, the gravity valveless filter also includes a controller, which is electrically connected to both a turbidity detector and a flow regulating valve. The controller is used to control the opening degree of the flow regulating valve based on the turbidity detected by the turbidity detector.

[0009] Furthermore, the controller is a PID controller.

[0010] Furthermore, the controller has a preset turbidity value, and there is a turbidity difference between the turbidity detected by the turbidity detector and the preset turbidity value. The turbidity difference is positively correlated with the opening degree of the flow regulating valve.

[0011] Furthermore, the discharge end of the extraction device is connected to a discharge pipe, which is used to discharge the condensate formed after the steam does work on the extraction device.

[0012] Furthermore, the gravity valveless filter also includes a collection tank, a siphon pipe connected to the collection tank, and a drain pipe connected to the collection tank.

[0013] Furthermore, a water seal is installed in the collection tank.

[0014] Furthermore, a vacuum gauge is installed on the pipeline connecting the pumping device to the siphon tube.

[0015] According to another aspect of the present invention, a water circulation device is provided, including a gravity valveless filter, which is the gravity valveless filter described above.

[0016] The gravity valveless filter, utilizing the technical solution of this utility model, includes a main body, an air extraction device, a flow regulating valve, and a turbidity detector. A siphon tube is installed on the main body, and the air extraction device is connected to the top of the siphon tube. The flow regulating valve is located at the power input end of the air extraction device and controls its power input. The turbidity detector detects the turbidity of the circulating water. The flow regulating valve is linked to the turbidity detector, and its opening is controlled by the turbidity detected by the detector. This gravity valveless filter monitors the turbidity changes of the circulating water in real time through the turbidity detector. Once the turbidity exceeds a set threshold, the detector sends a signal to the flow regulating valve through the linkage mechanism, adjusting the power input of the air extraction device. This causes the air extraction device to regulate the pressure inside the siphon tube, utilizing the siphon effect to backwash the gravity valveless filter, achieving automatic adjustment of the circulating water turbidity and improving the accuracy of water treatment. Since the backwashing timing of the gravity valveless filter is determined by the turbidity of the circulating water, the sensitivity to the turbidity of the circulating water is improved, enabling automatic forced backwashing of the gravity valveless filter and precise control of the turbidity of the circulating water. Through the above method, forced automatic control of turbidity can be achieved without manual monitoring, thus reducing the labor intensity of the equipment operators and lowering labor costs. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a gravity valveless filter according to an embodiment of the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 1. Main body; 11. Siphon tube; 2. Vacuum pump; 21. Drain pipe; 3. Flow regulating valve; 31. Steam self-regulating valve; 32. Steam pipeline; 4. Turbidity detector; 5. Controller; 6. Collection tank; 7. Vacuum gauge. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] See also Figure 1 As shown, according to an embodiment of the present invention, the gravity valveless filter includes a main body 1, an air extraction device 2, a flow regulating valve 3, and a turbidity detector 4. A siphon tube 11 is provided on the main body 1. The air extraction device 2 is connected to the top of the siphon tube 11. The flow regulating valve 3 is located at the power input end of the air extraction device 2 and controls the power input of the air extraction device 2. The turbidity detector 4 is used to detect the turbidity of the circulating water. The flow regulating valve 3 is linked with the turbidity detector 4, and the opening degree of the flow regulating valve 3 is controlled by the turbidity detected by the turbidity detector 4.

[0023] Turbidity detector 4 monitors changes in circulating water turbidity in real time. Once the turbidity exceeds a set threshold, a linkage mechanism is activated, sending a signal to flow regulating valve 3 to adjust the power input of the air extraction device 2. This causes the air extraction device 2 to regulate the pressure within the siphon tube 11, utilizing the siphon effect of the siphon tube 11 to backwash the gravity valveless filter. This achieves automatic adjustment of circulating water turbidity, improving the accuracy of water treatment. Since the backwashing timing of the gravity valveless filter is determined by the circulating water turbidity, the sensitivity to circulating water turbidity is increased, enabling automatic forced backwashing of the gravity valveless filter and precise control of circulating water turbidity. Through this method, forced automatic control of turbidity can be achieved without manual monitoring, thus reducing the labor intensity of equipment operators and lowering labor costs.

[0024] The suction device 2 is connected to the top of the siphon pipe 11. When the opening of the flow regulating valve 3 increases, the power input of the suction device 2 is enhanced, forming a stronger negative pressure, which accelerates the backwashing process of the filter, effectively improving the filtration efficiency and reducing the impact of turbidity fluctuations on the system.

[0025] The flow regulating valve 3 dynamically adjusts the vacuum intensity of the pumping device 2 based on the real-time data from the turbidity detector 4, avoiding unnecessary energy consumption, optimizing resource utilization, and reducing operating costs.

[0026] The integrated control of turbidity detection and flow regulation creates an intelligent water treatment process, which not only simplifies operation and reduces manual intervention, but also improves the system's response speed and control accuracy, providing operators with a more relaxed working environment.

[0027] For areas with strong winds and sandstorms and harsh environments, this filter can automatically adjust its backwashing strategy according to changes in the turbidity of the circulating water, ensuring that the circulating water treatment remains efficient and stable even under adverse conditions.

[0028] This design allows for adjustment of the set value of the flow regulating valve 3 and the power source of the air extraction device 2 according to specific needs, thereby adapting to different scales and types of circulating water systems, and has good flexibility and scalability.

[0029] The turbidity detector 4 can be, for example, a turbidity meter, or any other device capable of detecting the turbidity of water. The turbidity meter is installed in the circulating water tank or the circulating water return pipeline. It accurately determines changes in the quality of the circulating water and controls the opening of the steam valve based on the deviation between the actual and set process parameters.

[0030] The flow regulating valve 3 can be a gas flow regulating valve or a liquid flow regulating valve, depending on the power source of the pumping device 2.

[0031] In one embodiment, the extraction device 2 is, for example, an air ejector. Air ejectors play a crucial role in circulating water treatment systems, particularly in automated control processes involving gravity valveless filters to regulate circulating water turbidity. It is a device used to reduce the internal pressure of a container or system by extracting air or other gases to create a vacuum or negative pressure environment, thereby achieving specific process requirements.

[0032] The vacuum ejector, with its efficient suction capacity, accelerates the backwashing process of the gravity valveless filter. By rapidly creating a vacuum or negative pressure environment, it enhances the siphon effect, allowing deposits on the filter media to be quickly removed, thereby improving the turbidity control efficiency of the circulating water and the cleaning effect of the filter. Combined with an automatic control system such as the vacuum gauge 7 and PID controller, the vacuum level in the pipeline connected to the siphon pipe 11 can be precisely controlled. This precise control is crucial for avoiding excessive vacuuming, ensuring the system operates within safe limits, and optimizing the energy consumption and efficiency of the backwashing process.

[0033] The ejector uses steam as its driving energy source, effectively utilizing low-pressure steam produced as a byproduct or surplus of the unit. Compared to other power sources, this not only reduces energy consumption and operating costs but also embodies the environmental protection concept of rational resource utilization and improved energy efficiency. The ejector has a relatively simple structure, making it easy to maintain and repair. Compared to other components in the system, it may require less maintenance, helping to reduce overall maintenance costs and downtime, and ensuring the long-term stable operation of the system.

[0034] In one embodiment, the flow regulating valve 3 includes a steam self-regulating valve 31 and a steam pipeline 32 connected to the steam self-regulating valve 31. The steam pipeline 32 is used to provide steam power to the vacuuming device 2. The steam self-regulating valve 31 is mainly used to control the steam flow rate and pressure. By changing the valve opening, the speed and time of vacuuming by the vacuuming device 2 are controlled. The larger the valve opening, the greater the steam flow and the faster the vacuuming rate, enabling rapid backwashing of the gravity valveless filter.

[0035] The steam self-regulating valve 31 can adjust the steam flow rate in real time according to the signal of the turbidity detector 4, accurately control the power input of the pumping device 2, and ensure that the vacuum strength of the pumping device 2 corresponds to the change in the turbidity of the circulating water, thereby achieving dynamic and precise control of the turbidity of the circulating water.

[0036] Steam power is supplied to the extraction device 2 through the steam pipeline 32, which can quickly and stably transfer steam from the steam source to the extraction device 2, ensuring the instantaneous response and efficient drive of the extraction device 2 to the gravity valveless filter backwashing process.

[0037] Steam, as a highly efficient power source, avoids energy waste caused by excessive steam supply through precise regulation by the steam self-regulating valve 31, thereby improving the energy utilization efficiency of the entire system and reducing operating costs.

[0038] The introduction of the steam self-regulating valve 31 not only enables precise control of power input, but also provides operational flexibility. The opening degree of the steam self-regulating valve 31 can be adjusted to adapt to different backwashing requirements, ensuring that the gravity valveless filter can achieve optimal operating conditions under various working conditions.

[0039] The linkage between the steam self-regulating valve 31 and the turbidity detector 4, along with the efficient power transmission of the steam pipeline 32, together constitute an intelligent control system, realizing the automatic control of the gravity valveless filter backwashing process and promoting the construction of an intelligent factory.

[0040] Steam pipeline 32 is connected to a steam source. Depending on the actual situation, the surplus steam or by-product steam or other pressurized gas in the device can be used as an alternative power source to make full use of waste power, minimize the energy consumption of the device, and meet the requirements of efficient and high-quality operation of various circulating water devices.

[0041] In one embodiment, the driving steam is 0.5 MPa low-pressure steam produced by the unit or surplus steam.

[0042] In one embodiment, the gravity valveless filter further includes a controller 5, which is electrically connected to the turbidity detector 4 and the flow regulating valve 3, respectively. The controller 5 is used to control the opening degree of the flow regulating valve 3 according to the turbidity detected by the turbidity detector 4.

[0043] The controller 5 can receive real-time data from the turbidity detector 4 and automatically adjust the opening of the flow regulating valve 3 according to the preset turbidity standard. This intelligent control mechanism ensures the system's accurate response to the turbidity of the circulating water, improving the precision and timeliness of control.

[0044] Through the dynamic control of the controller 5, the opening of the flow regulating valve 3 can be flexibly adjusted according to the changes in the turbidity of the circulating water. This means that the system can quickly adapt to different working conditions and environmental conditions. In particular, under severe weather conditions such as wind and sand, it can effectively control turbidity fluctuations and maintain the stability of the water treatment process.

[0045] The intelligent control of Controller 5 avoids unnecessary flow adjustments, reducing energy waste. It can adjust the power input of the extraction device according to actual needs, optimizing system operation, reducing overall energy consumption, and improving energy efficiency. The introduction of Controller 5 automates the system operation process, reducing manual adjustments by operators, lowering workload, minimizing the possibility of human error, and improving the overall operational quality of the system.

[0046] Through the precise control of controller 5, the air extraction device can obtain the most suitable power input during the backwashing process, accelerating the backwashing efficiency of the gravity valveless filter, shortening the water treatment cycle, and improving the overall efficiency of the circulating water treatment system. Controller 5 can monitor and control the power input of the air extraction device, avoiding equipment damage or system failure caused by improper power input, and enhancing the safety and reliability of the system.

[0047] In one embodiment, controller 5 is a PID controller.

[0048] The PID controller, based on proportional, integral, and derivative control algorithms, can make very precise adjustments to the opening of the flow regulating valve 3. This control method can respond more quickly and accurately to minute changes in the turbidity of the circulating water, ensuring that the turbidity of the circulating water is maintained near the optimal setpoint, thus improving the control accuracy of the water treatment system.

[0049] The PID controller can monitor and analyze the feedback signal from the turbidity detector 4 in real time, and dynamically adjust the power input of the air extraction device 2 according to the real-time changes in the turbidity of the circulating water. This dynamic response mechanism ensures that the system can quickly adjust to rapid fluctuations in water turbidity and maintain the stability of water treatment performance.

[0050] The derivative control component in a PID controller can predict and reduce overshoot during the control process. This means that when the turbidity of the circulating water suddenly increases, the controller can smoothly increase the power input of the air extraction device, avoiding overreaction and thus reducing energy waste and equipment wear.

[0051] The integral control mechanism can eliminate static errors and maintain stable system operation over a long period of time. Even under conditions of long-term operation or slow changes in turbidity, the PID controller can ensure that the opening of the flow regulating valve 3 is maintained at the optimal level, avoiding control failure caused by the accumulation of static errors.

[0052] PID controllers offer the possibility of parameter adjustment, allowing for fine-tuning based on actual operating conditions to optimize control performance. This flexibility enables the system to achieve optimal turbidity control under various operating conditions.

[0053] Through the precision and stability of PID control, the system can avoid equipment damage caused by improper control, thus ensuring the safety of the circulating water treatment process.

[0054] In one embodiment, the controller 5 has a preset turbidity value, and the turbidity detected by the turbidity detector 4 has a turbidity difference with the preset turbidity value. The turbidity difference is positively correlated with the opening degree of the flow regulating valve 3.

[0055] The turbidity difference is positively correlated with the opening of the flow regulating valve 3, enabling the gravity valveless filter to precisely adjust the opening of the flow regulating valve 3 based on the real-time turbidity difference, ensuring that the power input of the air extraction device 2 perfectly matches the current turbidity requirement of the circulating water. This mechanism guarantees stable control of the circulating water turbidity, avoiding over-adjustment or under-adjustment.

[0056] The larger the turbidity difference, the further the actual turbidity deviates from the preset target. In this case, the opening of the flow regulating valve 3 will increase accordingly, providing higher suction power and accelerating the backwashing process of the filter. Conversely, when the turbidity difference decreases, the suction power decreases, reducing unnecessary energy consumption.

[0057] This positive correlation enables the system to automatically optimize operating parameters and adjust the operating intensity of the air extraction device 2 based on the turbidity difference, ensuring that the turbidity of the circulating water is always maintained within the preset ideal range, thereby improving the overall system operating efficiency and resource utilization efficiency.

[0058] Since the turbidity detector 4 can detect the turbidity of the circulating water in real time, the difference between the value and the preset value is immediately transmitted to the controller 5. The controller 5 quickly adjusts the flow regulating valve 3 according to the preset control strategy, realizing real-time control and enhancing the dynamic response capability of the system.

[0059] The automated turbidity difference control mechanism reduces the need for manual adjustments. Operators only need to set the preset turbidity value, and the system can run automatically, reducing workload and avoiding control errors caused by inaccurate human judgment.

[0060] This control strategy can flexibly adjust the positive correlation between the preset turbidity value and the opening degree according to different working environments and circulating water turbidity change trends, thereby enhancing the system's adaptability and flexibility.

[0061] In one embodiment, the discharge end of the vacuum device 2 is connected to a discharge pipe 21, which is used to discharge the condensate formed after the steam does work on the vacuum device 2.

[0062] The presence of the drain pipe 21 ensures that condensate generated inside the extraction device 2 can be discharged in a timely manner, preventing condensate accumulation inside the equipment and potential reduction in equipment efficiency or operational problems. Through the drain pipe 21, condensate can be collected and further treated or recycled, reducing water waste and improving the system's environmental performance. Timely discharge of condensate helps maintain the cleanliness of the extraction device 2's interior, reducing maintenance workload and extending the equipment's lifespan. Furthermore, the design of the drain pipe 21 considers the safety of condensate discharge, avoiding potential harm to equipment or operators from high-temperature condensate.

[0063] The accumulation of condensate may affect the operation of the extraction device 2, leading to a decrease in extraction efficiency. The drain pipe 21 ensures the smooth discharge of condensate, maintaining the stable operation of the extraction device 2 and improving the reliability and continuity of the entire circulating water treatment system. After the steam-driven extraction device 2 operates, the condensate is recovered through the drain pipe 21, allowing this portion of water to be recycled, reducing the consumption of fresh water, further improving energy efficiency, and lowering the cost of circulating water treatment.

[0064] In one embodiment, the gravity valveless filter further includes a collection tank 6, a siphon pipe 11 connected to the collection tank 6, and a drain pipe 21 connected to the collection tank 6.

[0065] The collection tank 6 can simultaneously collect water from the filter backwashing process and condensate from the steam discharged by the extraction device 2, achieving effective water resource recovery, improving water resource recycling efficiency, and reducing water treatment costs. The siphon pipe 11 and the drain pipe 21 are simultaneously connected to the collection tank 6, optimizing the system layout and piping design, simplifying the system structure, reducing connection points between equipment, lowering potential leakage risks, and improving the overall system integration and operational reliability.

[0066] By centrally treating backwash wastewater and steam condensate, the design of Collection Tank 6 helps reduce the system's environmental impact. It avoids the direct discharge of untreated water, reducing pollution to surrounding water bodies and reflecting the principle of modern industry that balances economic benefits with environmental responsibility. The introduction of Collection Tank 6 simplifies the operation process, eliminating the need for operators to separately treat filter backwash wastewater and steam condensate, thus reducing operational complexity and labor intensity. Simultaneously, the centralized water treatment method facilitates automated control, improving the system's ease of operation and management efficiency.

[0067] In one embodiment, a water seal is provided in the collection tank 6. A water seal is a common sealing method used in piping systems, equipment interfaces, or certain process devices. It is mainly used to prevent the leakage of gas, steam, or liquid, and also to prevent external air or impurities from entering the system. The basic principle of a water seal is to use a column of water of a certain height to generate pressure, thereby balancing or blocking the pressure difference between the internal and external gases or liquids, thus achieving a sealing effect.

[0068] The water seal, acting as a physical barrier, effectively prevents air from flowing back into the gravity valveless filter or the air extraction device 2 from the drain pipe 21 or siphon pipe 11, ensuring a vacuum environment inside the system. This is crucial for vacuum-dependent extraction and filtration processes, ensuring normal operation and backwashing efficiency. The water seal also maintains a certain water level inside the collection tank 6, preventing direct contact between the atmosphere and the system interior. This helps maintain the vacuum effect of the air extraction device 2, ensuring the gravity valveless filter reaches an ideal vacuum state during backwashing, thus improving filtration and cleaning efficiency.

[0069] In one embodiment, a vacuum gauge 7 is installed on the pipeline connecting the pumping device 2 to the siphon tube 11.

[0070] Vacuum gauge 7 monitors the vacuum level generated by the pumping device 2 in the siphon pipe 11 in real time, which is crucial for controlling and optimizing the pumping process. Accurate vacuum monitoring helps adjust the operating status of the pumping device 2, ensuring it operates within the ideal vacuum range, thereby improving the backwashing efficiency of the gravity valveless filter. Excessive vacuuming can damage equipment or the system, potentially causing pipe deformation, material fatigue, or instability in the water treatment system. The presence of vacuum gauge 7 allows operators or automatic control systems to monitor the vacuum level, ensuring it does not exceed safe operating limits, preventing equipment damage, and guaranteeing the safe operation of the system.

[0071] By monitoring the vacuum level, the steam input or operating time of the pumping device 2 can be adjusted in a timely manner to avoid unnecessary energy waste. When the vacuum level reaches the required level, the operating intensity of the pumping device 2 can be reduced, thereby reducing steam consumption, improving energy utilization efficiency, and reducing operating costs.

[0072] Vacuum gauge 7 helps operators or maintenance teams promptly detect anomalies in the system, such as abnormal increases or decreases in vacuum levels, which may indicate pipe blockages, pumping unit malfunctions, or control loop problems. Early fault diagnosis and preventative measures can avoid more serious equipment damage or system downtime, improving system reliability and continuous operation. Data from vacuum gauge 7 can be recorded for subsequent system performance analysis, optimization, and fault prediction. By analyzing historical vacuum data, the operating parameters of pumping unit 2 can be optimized, further improving system efficiency and stability.

[0073] This embodiment of the gravity valveless filter compares the turbidity changes of the circulating water turbidity meter with the preset turbidity value of the circulating water in the PID controller. The opening of the steam valve is adjusted according to the deviation between the preset and actual turbidity values ​​in the PID controller. The steam-driven vacuum pump, activated by the steam self-regulating valve, draws air out of the siphon tube of the gravity valveless filter, creating a vacuum and accelerating the automatic backwashing of the filter. During the vacuuming process, a vacuum gauge monitors the vacuum level inside the pipeline to prevent over-vacuuming and damage to the equipment and pipelines. The steam after work is collected as condensate through the condensate discharge pipeline, avoiding condensate waste.

[0074] This gravity valveless filter integrates the actual circulating water turbidity with the forced backwashing of the filter into an automated control program. The flow rate of the driving steam is controlled by changes in circulating water turbidity, and the steam flow rate directly affects the work done by the ejector. Higher circulating water turbidity results in a larger opening of the driving steam valve, a larger steam flow rate, greater work done by the ejector, and a faster vacuuming speed; conversely, lower circulating water turbidity results in a smaller opening of the driving steam valve, a smaller steam flow rate, less work done by the ejector, and a slower vacuuming speed. This process allows manual setting of the desired circulating water turbidity parameters based on the actual operating requirements of the circulating water system, reducing energy and circulating water consumption for automatic backwashing while meeting the system's operating conditions. Furthermore, the circulating water turbidity control process relies on the forced automatic backwashing of the gravity valveless filter. Based on changes in circulating water turbidity, the backwashing frequency is automatically and precisely controlled, improving the efficiency of the automatic forced backwashing and achieving accurate monitoring of circulating water turbidity. By switching between manual and automatic modes, the process parameter requirements of the circulating water device can be met under different production conditions and environmental conditions, while reducing the workload of the device operators and promoting the construction of automated factories.

[0075] According to an embodiment of the present invention, the water circulation device includes a gravity valveless filter, which is the gravity valveless filter described above.

[0076] The gravity valveless filter of this application, through the above technical solution, can achieve the following technical effects:

[0077] Improved filtration efficiency: Through the linkage mechanism between the turbidity detector and the flow regulating valve, the equipment can automatically adjust the backwashing frequency and intensity according to the turbidity of the circulating water, ensuring that the filter media inside the filter is always in the best working condition, thereby improving filtration efficiency.

[0078] Enhanced operational stability: The adoption of a PID controller enables precise control of the steam self-regulating valve opening, effectively avoiding instability and over- or under-adjustment issues caused by manual adjustment, thus ensuring long-term stable operation of the equipment.

[0079] Energy-saving and environmentally friendly: Using steam as a power source, compared with electric pumping devices, not only reduces energy consumption and operating costs, but also reflects the importance attached to environmental protection and is in line with the current trend of green development.

[0080] Resource recycling and treatment: The collection tank and water seal can effectively recycle and treat the condensate generated during backwashing, avoiding resource waste and environmental pollution, and further improving the economic benefits and environmental performance of the equipment.

[0081] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0082] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0083] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gravity valveless filter, characterized in that, The device includes a main body (1), an air extraction device (2), a flow regulating valve (3), and a turbidity detector (4). The main body (1) is provided with a siphon tube (11). The air extraction device (2) is connected to the top of the siphon tube (11). The flow regulating valve (3) is located at the power input end of the air extraction device (2) and controls the power input of the air extraction device (2). The turbidity detector (4) is used to detect the turbidity of the circulating water. The flow regulating valve (3) is linked with the turbidity detector (4). The opening degree of the flow regulating valve (3) is controlled by the turbidity detected by the turbidity detector (4).

2. The gravity valveless filter according to claim 1, characterized in that, The flow regulating valve (3) includes a steam self-regulating valve (31) and a steam line (32) connected to the steam self-regulating valve (31), the steam line (32) being used to provide steam power to the extraction device (2).

3. The gravity valveless filter according to claim 2, characterized in that, The gravity valveless filter also includes a controller (5), which is electrically connected to the turbidity detector (4) and the flow regulating valve (3) respectively. The controller (5) is used to control the opening degree of the flow regulating valve (3) according to the turbidity detected by the turbidity detector (4).

4. The gravity valveless filter according to claim 3, characterized in that, The controller (5) is a PID controller.

5. The gravity valveless filter according to claim 3, characterized in that, The controller (5) has a preset turbidity value stored in it. The turbidity detected by the turbidity detector (4) has a turbidity difference with the preset turbidity value. The turbidity difference is positively correlated with the opening degree of the flow regulating valve (3).

6. The gravity valveless filter according to claim 2, characterized in that, The exhaust end of the air extraction device (2) is connected to a drain pipe (21), which is used to discharge the condensate formed after the steam does work on the air extraction device (2).

7. The gravity valveless filter according to claim 6, characterized in that, The gravity valveless filter also includes a collection tank (6), the siphon pipe (11) is connected to the collection tank (6), and the drain pipe (21) is connected to the collection tank (6).

8. The gravity valveless filter according to claim 7, characterized in that, A water seal is provided in the collection tank (6).

9. The gravity valveless filter according to claim 1, characterized in that, A vacuum gauge (7) is installed on the pipeline connecting the pumping device (2) to the siphon tube (11).

10. A water circulation device, comprising a gravity valveless filter, characterized in that, The gravity valveless filter is the gravity valveless filter according to any one of claims 1 to 9.

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