Continuous water washing, deacidification and dealkalization device based on high-low pipeline switching

Abstract

The utility model discloses a continuous type water washing deacidification and dealkalization device based on high and low pipeline switching relates to material handling equipment technical field, the device includes agitator tank, agitator, high position pipeline, low position pipeline, three -way valve, water pump, filter press, liquid level sensor, temperature sensor, on -line pH meter and PLC control system, and high position pipeline and low position pipeline are connected respectively with three -way valve of agitator tank, and three -way valve is connected filter press through water pump, and each sensor is electrically connected with PLC control system and controls each executive component. The utility model discloses through high and low pipeline switching and realizes the automatic separation of supernatant and slurry, and realizes the continuous operation, the automation operation of water washing deacidification and dealkalization process in combination with PLC control system, solves the low efficiency of traditional intermittent washing, the problem of many manual intervention, control precision difference, significantly improves the processing efficiency and stability, is applicable to the material deacidification and dealkalization treatment of chemical industry, environmental protection and other fields.

Description

Technical Field

[0001] This utility model relates to the field of material handling equipment technology, and in particular to a continuous water washing deacidification and dealkali removal device based on high and low pipeline switching. Background Technology

[0002] In the material handling processes of chemical, environmental protection and other fields, it is often necessary to wash acidic or alkaline materials with water to remove acid and alkali in order to reduce the acidity or alkalinity of the materials and meet the requirements of subsequent processing or discharge.

[0003] Currently, traditional water washing deacidification and dealkali removal processes mostly employ intermittent operation: materials and water are added to a reaction tank, stirred and mixed, allowed to settle, and then the supernatant is manually discharged. It is then determined whether repeated water addition and stirring are necessary. If the desired consistency is achieved, the bottom slurry is manually discharged for solid-liquid separation. This method has the following drawbacks: 1. The operation is cumbersome and requires frequent manual intervention (such as judging the sedimentation endpoint, manually opening and closing valves, and testing pH value), resulting in high labor intensity; 2. Continuous production cannot be achieved; after each batch is processed, materials and water need to be re-fed and added, resulting in low processing efficiency. 3. The precision of manual control is poor. The timing of supernatant discharge and pH value judgment rely on experience, which can easily lead to unstable treatment results (such as supernatant carrying residue or incomplete discharge of slurry). 4. The equipment has a low degree of automation and is difficult to integrate with the production line to meet the needs of large-scale production.

[0004] Therefore, developing a water washing deacidification and dealkali removal device that can achieve continuous and automated control has become the key to solving the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a continuous water washing deacidification and dealkali removal device based on high and low pipeline switching, thus solving the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A continuous water washing deacidification and dealkali removal device based on high and low pipeline switching includes a stirring tank, a stirrer, a high-level pipeline, a low-level pipeline, a three-way valve, a water pump, a filter press, a liquid level sensor, a temperature sensor, an online pH meter, and a PLC control system. One end of each of the high-level and low-level pipes is connected to the mixing tank, and the other end is connected to the water pump through a three-way valve. The outlet of the water pump is connected to the filter press. The level sensor, temperature sensor, and online pH meter are all installed inside the mixing tank and are all electrically connected to the PLC control system. The PLC control system is also electrically connected to the agitator, three-way valve, and water pump.

[0007] Preferably, the stirrer is a variable frequency stirrer; The mixing tank is equipped with a guide plate; The mixing tank is a cylindrical tank, a square flat-bottomed tank, or a conical-bottomed tank with a bottom valve; If it is a cone-shaped bottom groove with a bottom valve, a fixed platform is erected and placed above the foundation; If it is a cylindrical trough or a square flat-bottomed trough, it can be fixed on a fixed platform above the foundation or in a pit below the foundation.

[0008] Preferably, the high-level pipe is used to discharge the supernatant, and its lowest point is located in the lower part of the mixing tank, and is 5-10 cm higher than the lowest point of the clarification zone after the treated material settles. The elevated pipeline is equipped with a height-adjustable movable support.

[0009] Preferably, the low-level pipeline is used to transport slurry with slag, and its lowest point is located at the bottom of the mixing tank and is 10-20 cm higher than the bottom of the mixing tank. If the mixing tank is a cone-bottom tank with a bottom valve, then no low-level pipe is installed, and the slurry is discharged through the bottom valve; The outlet of the low-level pipeline is equipped with an anti-clogging device, which is a screw conveyor or an ultrasonic vibrator.

[0010] Preferably, the three-way valve is an electric valve, and its three ports are respectively connected to the high-level pipeline, the low-level pipeline, and the water pump; When the supernatant is drained, the three-way valve closes the interface connected to the low-level pipeline and opens the interface connected to the high-level pipeline and the water pump. When discharging slurry, the three-way valve closes the interface connected to the high-level pipeline and opens the interface connected to the low-level pipeline and water pump. The switching of the three-way valve is controlled by a PLC control system.

[0011] Preferably, the PLC control system works in conjunction with an online pH meter, temperature sensor, and liquid level sensor to monitor the pH value of the supernatant, the temperature and liquid level in the stirring tank in real time. It can automatically determine whether the water washing step needs to be repeated, and trigger an alarm when the state of the mixing tank exceeds the limit, and automatically stop feeding, water intake and agitator operation.

[0012] Preferably, the components in the device that come into contact with acids and alkalis include pipes, valves, the inner wall of the mixing tank, and water pumps, and their materials are preferably polytetrafluoroethylene coating or titanium alloy.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Achieve continuous operation and improve processing efficiency: Through the switching design of high-level pipelines and low-level pipelines, combined with the automatic scheduling of the PLC control system, the continuous cycle of "stirring and mixing - settling - supernatant discharge - slurry discharge" can be completed in a single tank. There is no need for manual reset between batches, which greatly shortens the processing cycle and increases the processing capacity per unit time.

[0014] 2. High degree of automation, reducing manual intervention: Liquid level sensor, temperature sensor and online pH meter collect data in real time. PLC control system automatically controls the stirrer speed, three-way valve switching, water pump start and stop and water washing number. There is no need for manual judgment of sedimentation endpoint or detection of pH value, reducing labor intensity and avoiding human operation error.

[0015] 3. High control precision and stable processing effect: The online pH meter can accurately detect the acidity and alkalinity of the supernatant (accuracy ±0.1). The PLC system automatically determines whether to repeat the water washing according to the set threshold to ensure that the acidity and alkalinity of the material meet the standards. The height design of the high and low pipes (the high pipe is higher than the clarification zone and the low pipe is close to the bottom of the tank) can accurately separate the supernatant and the slurry, reducing the residue or slurry residue carried by the supernatant.

[0016] 4. Reasonable structural design and strong adaptability: Different types of mixing tanks (cylindrical tanks, conical bottom tanks, etc.) can be selected to adapt to different material characteristics; the height of the high-level pipeline is adjustable, and the low-level pipeline is equipped with an anti-clogging device to ensure stable operation of the equipment; the parts in contact with acids and alkalis are made of corrosion-resistant materials (PTFE coating or titanium alloy) to extend the service life of the equipment.

[0017] 5. High safety and easy production line linkage: The PLC system can automatically stop and alarm when the liquid level is abnormal or the temperature exceeds the standard, so as to avoid equipment damage or material spillage; the automatic control logic of the device can be linked with the upstream feeding and downstream processing equipment to meet the needs of large-scale production lines. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is an overall structural diagram of the present invention.

[0020] Legend: 1. Mixing tank; 2. Agitator; 3. High-level pipe; 4. Low-level pipe; 5. Three-way valve; 6. Water pump; 7. Filter press; 8. Liquid level sensor; 9. Temperature sensor; 10. Online pH meter; 11. PLC control system. Detailed Implementation

[0021] This application provides a continuous water washing deacidification and dealkali removal device based on high and low pipeline switching, which effectively solves the technical problems of poor deacidification and dealkali removal effect of high acid and alkali solid materials in the water washing deacidification and dealkali removal process, cumbersome repeated feeding and discharging operation, low efficiency and low degree of automation. Example

[0022] like Figure 1 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, this utility model provides a continuous water washing deacidification and dealkali removal device based on high and low pipeline switching, aiming to solve the problems of low efficiency and cumbersome operation of traditional intermittent water washing, and realize continuous and automated control of the material deacidification and dealkali removal process.

[0023] like Figure 1 As shown, the device mainly consists of a mixing tank 1, a stirrer 2, a high-level pipe 3, a low-level pipe 4, a three-way valve 5, a water pump 6, a filter press 7, a liquid level sensor 8, a temperature sensor 9, an online pH meter 10, and a PLC control system 11. The specific structure and connection relationship of each component are as follows: Mixing Tank 1: This is the core container for material reaction and can be a cylindrical tank, a square flat-bottomed tank, or a conical-bottomed tank with a bottom valve (selected according to material characteristics). If it is a conical-bottomed tank with a bottom valve, a fixed platform needs to be erected above the foundation for easy bottom discharge; if it is a cylindrical tank or a square flat-bottomed tank, it can be fixed on a fixed platform above the foundation or in a pit below the foundation to adapt to different site requirements. Mixing Tank 1 is equipped with baffles to enhance the uniformity of material and water mixing; its inner wall is coated with polytetrafluoroethylene, which is resistant to acid and alkali corrosion and extends the service life of the equipment.

[0024] Agitator 2: Installed at the top center of mixing tank 1, it is a variable frequency agitator, and the stirring speed (50-300 r / min) can be adjusted by PLC control system 11. When materials need to be mixed, high-speed stirring ensures full contact between water and materials; when materials need to settle, low-speed stirring avoids sedimentation and agglomeration, improving the separation effect of supernatant.

[0025] High-level pipe 3 and low-level pipe 4: High-level pipe 3 is used to discharge the supernatant. Its inlet end is connected to the lower part of the mixing tank 1, and its lowest point is 5-10 cm higher than the lowest point of the clarification zone after material settling, ensuring that only the clarified liquid is discharged without entraining solid particles. High-level pipe 3 is equipped with an adjustable height movable support, which can flexibly adjust the inlet position according to the material settling height. The low-level pipe 4 is used to transport slurry containing slag. Its inlet end is located at the bottom of the mixing tank 1, 10-20 cm above the bottom of the tank, to prevent slag accumulation and blockage at the bottom. If the mixing tank 1 is a cone-bottom tank with a bottom valve, the low-level pipe 4 is not required, and the slurry is discharged directly from the bottom valve. The outlet of the low-level pipe 4 is equipped with an anti-clogging device (such as a screw conveyor or ultrasonic vibrator) to prevent solid particles in the slurry from depositing and clogging the pipe.

[0026] Three-way valve 5 and water pump 6: Three-way valve 5 is an electric valve with three ports connected to the high-level pipe 3, low-level pipe 4, and water pump 6 respectively. Its switching is automatically controlled by the PLC control system 11. When supernatant needs to be discharged, three-way valve 5 closes the low-level pipe 4 port and connects the high-level pipe 3 to the water pump 6; when slurry needs to be discharged, it closes the high-level pipe 3 port and connects the low-level pipe 4 to the water pump 6. Water pump 6 is an acid and alkali resistant centrifugal pump that transports liquid or slurry to the filter press 7.

[0027] Filter press 7: Receives the material conveyed by water pump 6, performs solid-liquid separation on the slurry, and transports the separated solid residue off-site for treatment. The filtrate can be recycled or discharged in compliance with standards.

[0028] Sensor and PLC control system 11: Liquid level sensor 8 is installed on the inner wall of the mixing tank 1 to monitor the liquid level in the tank in real time and prevent overflow or dry running; Temperature sensor 9 is used to detect the temperature of the material in the tank. When the temperature exceeds the process range (e.g., 5-60℃), it triggers a PLC alarm. An online pH meter 10 is inserted into the material to detect the pH value of the supernatant in real time (accuracy ±0.1), providing a basis for determining the endpoint of deacidification and dealkali removal; The PLC control system 11 is electrically connected to the aforementioned sensors and actuators (stirring 2, three-way valve 5, water pump 6) to achieve automated control. When the online pH meter 10 detects that the pH value of the supernatant has reached the set range (e.g., 6-8), it automatically stops the water washing; if it does not meet the standard, it automatically opens the water inlet valve to add water and repeats the stirring and sedimentation steps. When the liquid level sensor 8 detects that the liquid level is too low or too high, or the temperature sensor 9 detects an abnormal temperature, an audible and visual alarm will be triggered immediately, and the feeding, water intake, and agitator 2 will be automatically stopped to ensure equipment safety.

[0029] Workflow: The continuous water washing process for deacidification and dealkali removal in this device is as follows: The material to be processed enters the mixing tank 1, the PLC control system 11 starts the agitator 2, and at the same time injects clean water (or acid-base adjustment solution), and the high-speed stirring makes the material and water fully mixed (stirring time 10-30 minutes).

[0030] After stirring, reduce the stirring speed to low-speed sedimentation (10-20 min), and the material will separate into bottom residue and upper supernatant.

[0031] The PLC control system 11 controls the three-way valve 5 to switch to the high-level pipeline 3, starts the water pump 6 to transport the supernatant to the filter press 7, and the online pH meter 10 simultaneously detects the pH value of the supernatant.

[0032] If the pH value meets the standard, the PLC controls the three-way valve 5 to switch to the low-level pipeline 4, discharging the bottom slurry to the filter press 7 for separation; if it does not meet the standard, repeat steps 1-3 until the pH value meets the requirements.

[0033] After a single processing cycle is completed, the device automatically resets and begins processing the next batch, enabling continuous operation.

[0034] This invention achieves the separation of supernatant and slurry by switching between high and low pipelines. Combined with PLC automatic control, it significantly improves the efficiency of water washing for acid and alkali removal, reduces manual intervention, and is suitable for material handling scenarios in chemical, environmental protection and other fields.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A continuous water washing dealkalization and deacidification device based on high-low pipeline switching, characterized in that, It includes a mixing tank (1), a stirrer (2), a high-level pipe (3), a low-level pipe (4), a three-way valve (5), a water pump (6), a filter press (7), a liquid level sensor (8), a temperature sensor (9), an online pH meter (10), and a PLC control system (11). One end of the high-level pipe (3) and the low-level pipe (4) are connected to the mixing tank (1), and the other end is connected to the water pump (6) through the three-way valve (5). The outlet of the water pump (6) is connected to the filter press (7). The level sensor (8), temperature sensor (9), and online pH meter (10) are all located in the stirring tank (1) and are all electrically connected to the PLC control system (11). The PLC control system (11) is also electrically connected to the stirrer (2), the three-way valve (5), and the water pump (6).

2. The apparatus of claim 1, wherein: The stirrer (2) is a variable frequency stirrer; The mixing tank (1) is equipped with a guide plate; The stirring tank (1) is a cylindrical tank, a square flat-bottomed tank, or a conical-bottomed tank with a bottom valve; If it is a cone-shaped bottom groove with a bottom valve, a fixed platform is erected and placed above the foundation; If it is a cylindrical trough or a square flat-bottomed trough, it can be fixed on a fixed platform above the foundation or in a pit below the foundation.

3. The apparatus according to claim 1, characterized in that: The high-level pipe (3) is used to discharge the supernatant. Its lowest point is located in the lower part of the mixing tank (1) and is 5-10 cm higher than the lowest point of the clarification zone after the treated material settles. The high-level pipeline (3) is equipped with an adjustable height movable support.

4. The apparatus according to claim 1, characterized in that: The low-level pipe (4) is used to transport slurry with slag. Its lowest point is located at the bottom of the mixing tank (1) and is 10-20 cm higher than the bottom of the mixing tank (1). If the mixing tank (1) is a cone-bottom tank with a bottom valve, then the low-level pipe (4) is not installed, and the slurry is discharged from the bottom valve; The outlet of the low-level pipe (4) is provided with an anti-clogging device, which is a screw conveyor or an ultrasonic vibrator.

5. The apparatus of claim 1, wherein: The three-way valve (5) is an electric valve, and its three ports are respectively connected to the high-level pipe (3), the low-level pipe (4) and the water pump (6). When the supernatant is discharged, the three-way valve (5) closes the interface connected to the low-level pipeline (4) and opens the interface connected to the high-level pipeline (3) and the water pump (6); When the slurry is discharged, the three-way valve (5) closes the interface connected to the high-level pipe (3) and opens the interface connected to the low-level pipe (4) and the water pump (6); The switching of the three-way valve (5) is controlled by the PLC control system (11).

6. The apparatus according to claim 1, characterized in that: The PLC control system (11) works in conjunction with the online pH meter (10), temperature sensor (9), and liquid level sensor (8) to detect the pH value of the supernatant, the temperature and liquid level in the stirring tank (1) in real time. It can automatically determine whether the water washing step needs to be repeated, and trigger an alarm when the state of the mixing tank (1) exceeds the limit, and automatically stop feeding, water intake and the operation of the agitator (2).

7. The apparatus according to claim 1, characterized in that: The components in the device that come into contact with acids and alkalis include pipes, valves, the inner wall of the mixing tank (1) and the water pump (6), which are made of polytetrafluoroethylene coating or titanium alloy.

Images