Online dosing and diluting device for filter press

Abstract

The utility model discloses a filter press on -line dosing dilution device, including the medicine pipeline section, water pipeline section and intermediate connecting pipeline section three parts, its characterized by, intermediate connecting pipeline section intercommunication medicine pipeline section and water pipeline section, when the water pipe solenoid valve on water pipeline section opens, clear water can enter medicine pipeline section and medicament fusion, the medicine pipe manual valve and water pipe manual valve on its can adjust the medicine flow and water flow, and then can adjust the ideal medicament concentration, the medicine pipeline section upper end and lower end are respectively connected filter press feed pipe and medicine screw pump, and the lower end of water pipeline section is connected external water pipe, when filter press feed pressure rises to dosing dilution setting value, and PLC control box controls the water pipe solenoid valve on water pipeline section to open, realizes automatic dilution, and controls water pipe solenoid valve to close after feed end, and its advantages are: realized timely automatic dilution, saved medicament, avoided the unloading wire drawing phenomenon caused by too much medicament addition, and improved the filtration effect.

Description

Technical Field

[0001] This utility model belongs to the field of automation technology of pressure filtration equipment in solid-liquid separation process, and relates to an online dosing and dilution device for a filter press. Background Technology

[0002] A filter press is a general-purpose pressure filtration device suitable for solid-liquid separation of various suspensions. An automatic filter press mainly consists of a frame and pressing mechanism, a filtration mechanism, a plate-pulling mechanism, a hydraulic drive mechanism, and an electrical control system. Filter plates are arranged on the main beams on both sides, and filter cloth is wrapped around the filter plates. The recessed portions of adjacent filter plates form filter chambers. The general working process of an automatic filter press is as follows: the solid-liquid mixture is pressurized and transported to the filter chambers of the filter press by a feed pump. The filter cloth traps particles in the material to form a filter cake. The filtrate is discharged from the filter chamber through the outlet holes of the filter plates. The plate-pulling mechanism's plate-pulling trolley moves back and forth on the plate-pulling track to pull open the filter plates (open the filter chambers), and the filter cake automatically falls off under gravity.

[0003] An automatic dosing machine, also known as an automatic flocculant dosing machine, is a device that mixes flocculant powder with water. The dosing concentration is controlled by adjusting the dosing motor speed and water addition rate, typically between 0.1% and 0.5%. The flocculant powder is polyacrylamide powder, which causes suspended particles in wastewater to flocculate into clumps. In filter press production, adding flocculant powder to the material accelerates the solid-liquid separation process, making it easier to form a filter cake. During the filter press feeding process, the PLC control box detects the feed pump's operating signal and controls the screw pump on the automatic dosing machine to rotate. The screw pump delivers the flocculant into the filter press's feed pipe. The flocculant mixes with the material and enters the filter chamber under pressure from the feed pump. The flocculation effect of the flocculant leads to faster filter cake formation, shortening the feeding time and improving the filtration efficiency.

[0004] The existing online dosing process for filter press feed, which involves adding chemicals to the feed pipe while the material is being fed, has the following drawbacks: In the early stages of feeding, the flow rate in the feed pipe is high, requiring a large amount of chemicals. However, as the feeding time increases and the filter chamber gradually fills, the flow rate in the feed pipe decreases, and the required amount of chemicals also decreases. Although the frequency of the dosing screw pump is adjustable, a large amount of chemicals is still transported into the feed pipe. The disadvantages are: 1. It wastes chemicals and increases costs; 2. If too much chemicals are added to the material, it will result in high moisture content in the filter cake, affecting the filtration effect; 3. Due to excessive flocculant powder entering the filter chamber, flocculant may become stringy during unloading, causing the filter cake to stick to the filter cloth and affecting filter cake detachment. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing online dosing process for filter press feed, solve the corresponding technical problems, and provide an online dosing and dilution device for filter press.

[0006] The technical solution adopted by this utility model to solve the existing technical problems is: the filter press online dosing and dilution device, which is mainly composed of three parts: the dosing pipeline section, the water pipeline section, and the intermediate connecting pipeline section. Its features are: (1) the main components of the dosing pipeline section from top to bottom are flange, dosing pipe check valve, pipeline mixer, oblique tee, dosing pipe manual valve and flange. The components are connected by PVC pipe. The bottom flange connects to the external pipeline to connect to the dosing screw pump. The top flange connects to the external pipeline to the filter press feed pipeline. The oblique tee The intermediate connecting pipe section can introduce clean water into the drug delivery pipe section. The medicine and clean water are fully mixed in the pipe mixer. The drug pipe check valve can prevent the material in the feed pipe from entering the drug delivery pipe section. The drug pipe manual valve can adjust the drug delivery flow rate and is also convenient for maintenance. (2) The main components of the water delivery pipe section from top to bottom are water pipe check valve, rotor flow meter, water pipe solenoid valve, water pipe manual valve and flange. The components are connected by PVC pipe. The upper end of the water pipe check valve is also equipped with PVC pipe for connection with the intermediate connecting pipe section. The flange at the lower end of the water supply pipeline connects to the external tap water pipeline. The water pipe check valve can prevent the agent in the drug delivery pipeline from entering the water supply pipeline. The rotor flow meter can directly observe the flow rate of the delivered clean water. The water pipe solenoid valve is connected to the filter press PLC control box. When the feed pressure reaches the dosing dilution set value, the PLC control box controls the water pipe solenoid valve to open automatically. The water pipe manual valve can adjust the water delivery flow rate and is also convenient for maintenance. (3) The intermediate connecting pipeline section is composed of right-angle elbows, 45° elbows and PVC pipes, and the whole is Z-shaped. The two ends connect the drug delivery pipeline section and the water delivery pipeline section. Its function is to keep the drug delivery pipeline section and the water delivery pipeline section parallel, and at the same time reduce the overall height of the filter press online dosing dilution device, so that it occupies less space; (4) By adjusting the operating frequency of the drug delivery screw pump or the opening degree of the manual valve of the drug pipe, the drug delivery flow rate or amount can be adjusted. By adjusting the opening degree of the manual valve of the water pipe, the water delivery flow rate or amount can be adjusted. This can dilute the dosing concentration, avoid waste of the agent, and also avoid poor filtration effect and unloading stringing caused by excessive dosing.

[0007] Furthermore, the main components of the drug delivery pipeline section, from top to bottom, are flanges, a drug delivery check valve, a pipeline mixer, a tee, a manual drug delivery valve, and flanges. All components are connected by PVC pipes and are made of PVC. The upper flange is a DN50 type, connecting to the external pipeline and the feed pipe of the filter press. The drug delivery check valve is model H42X-16U DN50, its function being to prevent material from the feed pipe from entering the drug delivery pipeline section. The pipeline mixer is model SK-68650, with an internal spiral to ensure thorough mixing of the drug and water. The 45° tee connects the angled end to the middle connecting pipeline section, allowing water to be introduced into the drug delivery pipeline section at the tee. The manual drug delivery valve is model Q11F-16U. The DN50 type serves to not only regulate the drug delivery flow rate but also facilitate pipeline maintenance. The lower flange is DN50, which connects to the external pipeline and the drug delivery screw pump.

[0008] Furthermore, the main components of the water pipeline section, from top to bottom, are a water pipe check valve, a rotor flow meter, a water pipe solenoid valve, a water pipe manual valve, and flanges. These components are connected by PVC pipes. A PVC pipe is also installed above the water pipe check valve. Except for the water pipe solenoid valve, which is made of brass, all other components are made of PVC. The water pipe check valve model is H42X-16UDN50, and its upper end is connected to the intermediate connecting pipeline section via a PVC pipe. The function of the water pipe check valve is to prevent backflow in the drug delivery pipeline section or the intermediate connecting pipeline section. The reagent or clean water flows back into the water supply pipeline section; the rotor flowmeter model is LZB-50, and its function is: after the water pipe solenoid valve is opened to allow clean water to flow in, the water flow rate can be directly observed through the rotor flowmeter; the water pipe solenoid valve model is SCG238F018, which is connected to the filter press PLC control box. When the feed pressure of the filter press reaches the dosing dilution set value, the PLC control box controls the water pipe solenoid valve to open automatically, and controls the water pipe solenoid valve to close automatically after the feeding process is completed; the water pipe manual valve model is Q11F-16U DN50, and its function is: not only to adjust the water supply flow rate, but also to facilitate pipeline maintenance; the flange at the lower end of the water supply pipeline section is DN50, which is used to connect to the external tap water pipeline.

[0009] Furthermore, the intermediate connecting pipe section mainly consists of right-angle elbows, 45° elbows, and PVC pipes, forming a Z-shape. The 45° elbow is located at the end of the intermediate connecting pipe section, with PVC pipes installed at both ends. One end connects to the oblique tee of the drug delivery pipe section, and the other end of the intermediate connecting pipe section has a right-angle elbow that connects to the PVC pipe at the upper end of the water delivery pipe section. The function of the intermediate connecting pipe section is to connect the drug delivery pipe section and the water delivery pipe section, while ensuring that the drug delivery pipe section and the water delivery pipe section are installed in parallel, and to minimize the assembly length of the filter press online dosing and dilution device, thus reducing its space occupation.

[0010] The online chemical dosing and dilution device for filter presses provided by this utility model has the advantages of compact structure, convenient assembly, and online dilution. Both the chemical dosing flow rate and the water supply flow rate are adjustable. It can not only dilute the concentration of chemicals added online, ensuring that the dosage is not too high and avoiding flocculant stringing during unloading, but also reduce the amount of flocculant powder used, saving costs. On the other hand, this online chemical dosing and dilution device for filter presses can be automatically controlled by the filter press PLC control box to open the water pipe solenoid valve of the water supply section, allowing clean water to flow in, realizing automatic online dilution, avoiding manual intervention and improving production efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the online chemical dosing and dilution device for the filter press of this utility model.

[0012] Figure 2 This is a schematic diagram of the drug delivery pipeline section of the online dosing and dilution device for the filter press of this utility model.

[0013] Figure 3 This is a schematic diagram of the water supply pipeline section of the online chemical dosing and dilution device for the filter press of this utility model.

[0014] Figure 4 This is a schematic diagram of the intermediate connecting pipeline section of the online chemical dosing and dilution device for the filter press of this utility model.

[0015] Figure 5 This is an assembly drawing of the online dilution application of the online chemical dosing and dilution device for filter presses according to this utility model.

[0016] Reference numerals in the attached drawings: 1-Drug delivery pipeline section, 2-Water delivery pipeline section, 3-Intermediate connecting pipeline section, 4-Drug delivery check valve, 5-Pipeline mixer, 6-Angled tee, 7-Drug delivery manual valve, 8-Flange, 9-PVC pipe, 10-Water delivery check valve, 11-Rotameter, 12-Water pipe solenoid valve, 13-Water pipe manual valve, 14-Right angle elbow, 15-45° elbow, 16-Online dosing and dilution device for filter press (this utility model), 17-Filter press, 18-Automatic dosing machine, 19-Drug delivery screw pump, 20-Feed pump, 21-PLC control box, 22-Feed pipeline. Detailed Implementation

[0017] The technical solutions of the present invention will be described below with reference to the accompanying drawings of the embodiments of the online chemical dosing and dilution device for filter press. The described embodiments are only a portion of the preferred embodiments of the present invention, and not all of them. All other embodiments without inventive step made by those skilled in the art based on the embodiments of the present invention are within the protection scope of the present invention. Example

[0018] The filter press online dosing and dilution device 16 is mainly composed of three parts: a drug delivery pipeline section 1, a water delivery pipeline section 2, and an intermediate connecting pipeline section 3. Its features are as follows: (1) The main components of the drug delivery pipeline section 1 from top to bottom are flange 8, drug pipe check valve 4, pipeline mixer 5, oblique tee 6, drug pipe manual valve 7, and flange 8. The components are connected by PVC pipe 9. The bottom flange 8 is connected to the external pipeline to the drug delivery screw pump 19, and the top flange 8 is connected to the external pipeline to the... The feed pipe 22 of the filter press 17 is connected to the intermediate connecting pipe section 3 at the oblique tee 6, which can introduce clean water into the drug delivery pipe section 1; (2) The main components of the water delivery pipe section 2 from top to bottom are the water pipe check valve 10, the rotor flow meter 11, the water pipe solenoid valve 12, the water pipe manual valve 13, and the flange 8. The components are connected by PVC pipe 9. The upper end of the water pipe check valve 10 is also equipped with PVC pipe 9 so as to connect with the intermediate connecting pipe section 3. The lower end of the water delivery pipe section 2 Flange 8 is connected to the external tap water pipeline, and water pipe solenoid valve 12 is connected to the filter press PLC control box 21. When the feed pressure reaches the dosing dilution set value, PLC control box 21 controls water pipe solenoid valve 12 to open automatically. After the feed is finished, control water pipe solenoid valve 12 to close. (3) The intermediate connecting pipe section 3 is composed of right angle elbow 14, 45° elbow 15 and PVC pipe 9. The whole is Z-shaped, and the two ends are connected to the drug delivery pipe section 1 and the water delivery pipe section 2. (4) After the drug delivery screw pump 19 is started and the water pipe solenoid valve 12 on the water delivery pipe section 2 is opened, the drug and clean water will meet at the oblique tee 6 of the drug delivery pipe section 1 and spiral up in the pipe mixer 5. During the rising process, the drug and clean water are mixed. The drug delivery flow rate or amount can be adjusted by adjusting the operating frequency of the drug delivery screw pump 19 or the opening degree of the drug pipe manual valve 7. The water delivery flow rate or amount can be adjusted by adjusting the opening degree of the water pipe manual valve 13. Thus, the drug concentration can be diluted to the ideal degree.

[0019] The main components of the drug delivery pipeline section 1, from top to bottom, are flange 8, drug pipeline check valve 4, pipeline mixer 5, oblique tee 6, drug pipeline manual valve 7, and flange 8. All components are connected by PVC pipes 9, and all components are made of PVC. The upper flange 8 is a DN50 type, connecting to the external pipeline and the feed pipe 22 of the filter press 17. The drug pipeline check valve 4 is model H42X-16U. The DN50 connector is used to prevent material from the feed pipe 22 from entering the drug delivery pipe section 1. The pipe mixer 5, model SK-68650, has an internal spiral to ensure thorough mixing of the drug and water. The oblique tee 6 is a 45° oblique tee that complements the 45° elbow 15 of the intermediate connecting pipe section 3. Its function is to connect the oblique tee to the intermediate connecting pipe section 3, allowing water to be introduced into the drug delivery pipe section 1 at the oblique tee 6. The manual valve 7, model Q11F-16UDN50, is used to adjust the drug delivery flow rate and facilitate pipe maintenance. The lower flange 8, model DN50, connects to the external pipe and connects to the drug delivery screw pump 19.

[0020] The main components of the water pipeline section 2, from top to bottom, are a water pipe check valve 10, a rotor flowmeter 11, a water pipe solenoid valve 12, a water pipe manual valve 13, and a flange 8. All components are connected by PVC pipes 9. A PVC pipe 9 is also installed on the upper end of the water pipe check valve 10. Except for the water pipe solenoid valve 12, which is made of brass, all other components are made of PVC. The water pipe check valve 10 is model H42X-16U. DN50, the upper end is connected to the intermediate connecting pipe section 3 via PVC pipe 9. The function of the water pipe check valve 10 is to prevent the backflow of medicine or clean water from the medicine delivery pipe section 1 or the intermediate connecting pipe section 3 to the water delivery pipe section 2. The rotor flow meter 11 is model LZB-50, and its function is to allow the water flow rate to be visually observed after the water pipe solenoid valve 12 is opened to allow clean water to enter. The water pipe solenoid valve 12 is model SCG238F018, which is connected to the PLC control box 21 of the filter press 17. When the feed pressure of the filter press 17 reaches the set value for dosing and dilution, the PLC control box 21 controls the water pipe solenoid valve 12 to open automatically, and controls the water pipe solenoid valve 12 to close automatically after the feeding process is completed. The water pipe manual valve 13 is model Q11F-16U. The DN50 type is used to not only adjust the water flow rate but also facilitate pipeline maintenance. The flange 8 at the lower end of the water pipeline section 2 is of type DN50 and is used to connect to the external tap water pipeline.

[0021] The intermediate connecting pipe section 3 mainly consists of a right-angle elbow 14, a 45° elbow 15, and a PVC pipe 9, forming a Z-shape. The 45° elbow 15 is located at the end of the intermediate connecting pipe section 3, with its angle complementary to the oblique tee 6 of the drug delivery pipe section 1. PVC pipes 9 are installed at both ends, with the outer end of the PVC pipe 9 connecting to the oblique tee 6 of the drug delivery pipe section 1. The right-angle elbow 14 at the other end of the intermediate connecting pipe section 3 is connected to the PVC pipe 9 at the upper end of the water delivery pipe section 2. The function of the intermediate connecting pipe section 3 is to connect the drug delivery pipe section 1 and the water delivery pipe section 2, while ensuring that the drug delivery pipe section 1 and the water delivery pipe section 2 are installed in parallel, and to minimize the assembly length of the filter press online dosing and dilution device 16, thus reducing the space occupied. Example

[0022] An automatic filter press 17 is provided. The equipment or device used in the filtration process of the automatic filter press 17 includes the filter press online dosing and dilution device 16 described in Embodiment 1. The flange 8 at the lower end of the dosing pipeline section 1 of this device is connected to the dosing screw pump 19 on the automatic dosing machine 18, and the upper flange 8 is connected to the feed pipe 22 of the filter press 17. The flange 8 at the lower end of the water pipeline section 2 is connected to the tap water pipeline. The water pipe solenoid valve 12 on the water pipeline section 2 is wired to the PLC control box 21 of the filter press 17. In addition, the feed pump 20 and the dosing screw pump 19 on the automatic dosing machine 18 are also wired to the PLC control box 21. The feeding process of the automatic filter press 17 is as follows: (1) The filter press 17 presses the filter plates, and the recessed part between adjacent filter plates forms a filter chamber; (2) The PLC control box 21 controls the start of the feed pump 20 and the drug delivery screw pump 19, and the agent in the automatic dosing machine 18 is transported to the feed pipe 22 to mix with the solid-liquid mixture. Under the flocculation of the flocculant, the material achieves rapid solid-liquid separation. The filtrate flows out of the filter chamber, and the solid particles are intercepted by the filter cloth in the filter chamber to form a filter cake; (3) As the feeding proceeds, the pressure in the filter chamber of the filter press 17 gradually increases. The PLC control box 21 detects the pressure gauge of the feed. When the pressure reaches the set value for dosing and dilution, the PLC control box 21 controls the water pipe solenoid valve 12 on the filter press online dosing and dilution device 16 to open. At this time, clean water flows into the filter press online dosing and dilution device 16 and dilutes the agent. The diluted agent enters the feed pipe 22 and mixes with the material. (4) When the feed pressure reaches the set upper limit value, the material fills the filter chamber and the liquid output is very small, the feed is stopped. The PLC control box 21 controls the feed pump 20 and the drug delivery screw pump 19 to stop running. At the same time, it also controls the water pipe solenoid valve 12 on the filter press online dosing and dilution device 16 to close.

[0023] The online dosing and dilution device 16 for filter press provided by this utility model can adjust the flow rate of the feed agent and the flow rate of the water to achieve adjustable concentration of the diluted agent. At the same time, the online dilution can be automatically controlled by the PLC control box 21. It can automatically dilute the agent when the feed flow rate decreases. This not only eliminates the need for manual intervention and improves production efficiency, but also avoids agent waste and the occurrence of stringing during unloading due to excessive dosing, thus improving the filtration effect.

Claims

1. An online chemical dosing and dilution device for a filter press, mainly composed of three parts: a chemical delivery pipeline section, a water delivery pipeline section, and an intermediate connecting pipeline section, characterized in that... (1) The main components of the drug delivery pipeline from top to bottom are flange, drug pipe check valve, pipeline mixer, oblique tee, drug pipe manual valve and flange, and the components are connected by PVC pipe; (2) The main components of the water delivery pipeline from top to bottom are water pipe check valve, rotor flow meter, water pipe solenoid valve, water pipe manual valve and flange, and the components are connected by PVC pipe, and PVC pipe is also installed at the upper end of the water pipe check valve; (3) The intermediate connecting pipeline consists of right angle elbow, 45° elbow and PVC pipe, and the whole is in the shape of Z; (4) The PVC pipe at one end of the 45° elbow of the intermediate connecting pipeline is connected to the oblique tee of the drug delivery pipeline, and the other end of the intermediate connecting pipeline is connected to the PVC pipe at the upper end of the water pipe check valve of the water delivery pipeline, so that the drug delivery pipeline and the water delivery pipeline are connected.

2. The online chemical dosing and dilution device for a filter press according to claim 1, characterized in that, The main components of the drug delivery pipeline section, from top to bottom, are flanges, a drug tube check valve, a pipeline mixer, a tee, a manual drug tube valve, and flanges. All components are connected by PVC pipes. All components are made of PVC. The flanges are DN50 type, the drug tube check valve is model H42X-16U DN50, the pipeline mixer is model SK-68650, the tee is a 45° tee, and the manual drug tube valve is model Q11F-16U DN50.

3. The online chemical dosing and dilution device for a filter press according to claim 1, characterized in that, The main components of the water pipeline section, from top to bottom, are a water pipe check valve, a rotor flow meter, a water pipe solenoid valve, a water pipe manual valve, and a flange. All components are connected by PVC pipes. A PVC pipe is also installed on the upper end of the water pipe check valve. Except for the water pipe solenoid valve, which is made of brass, all other components are made of PVC. The flange is DN50 type, the water pipe check valve model is H42X-16U DN50, the rotor flow meter model is LZB-50, the water pipe solenoid valve model is SCG238F018, and the water pipe manual valve model is Q11F-16U DN50.

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