Material dehydration and chemical dosing system

Abstract

The present invention provides a material dehydration and dosing system, comprising: an on-line dehydration device including a feed pipeline and a feed tank; a sampling dehydration device including a sampling assembly, a dosing assembly, a coarse material blending assembly, a distributor and a plurality of filtering assemblies, the distributor having a pulp inlet and a plurality of pulp outlets; the sampling assembly is respectively communicated with the feed pipeline and the pulp inlet; the dosing assembly is respectively communicated with the pulp inlet and the feed tank; the coarse material blending assembly is respectively communicated with the pulp inlet and the feed tank; the filtering assemblies are capable of filtering the pulp added with a filter aid and / or coarse material; a detection system arranged on the filtering assemblies; a control system capable of controlling the amount of pulp, the amount of filter aid and the amount of coarse material introduced into the pulp inlet, and the control system is electrically connected to the detection system, and the detection system is capable of transmitting signals to the control system. Through the technical solution provided by the present application, the problem of poor dehydration effect of the existing pressure filtration dehydration device can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material dehydration dosing systems, and more particularly, to a material dehydration dosing system. Background Art

[0002] At present, material filtration involves a very wide range of fields. With the development of resources, the concentrate and tailings products produced in mineral processing are becoming increasingly fine-grained. The increase in the content of fine particles in the pulp causes problems such as difficulty in forming cakes, extended filtration cycles, and accumulation of fine mud. It is also very difficult for the filtration equipment in the dehydration system to achieve the purpose of intercepting fine materials. In order to increase the liquefied solid content and achieve the purpose of rapid solid-liquid separation, some filter aids or coarse materials need to be added during pulp filtration.

[0003] Among them, when adding coarse materials to the pulp, due to the local contact between coarse particles, a skeleton effect can be achieved, and the frictional resistance suffered by the filtrate during seepage through the filter cake medium is relatively small. However, as the addition amount increases, the mass concentration of the pulp continuously increases, and the filter cake formed by the mutual wrapping and filling of coarse and fine particle tailings becomes denser, with a reduction in effective pores, resulting in a decrease in the filtrate flow rate. In addition, the increase in non-uniform coarse and fine particles leads to an increase in frictional losses during the seepage process, and the solid-liquid separation effect deteriorates. Excessive addition of coarse materials in the filtration process is not conducive to increasing the filter cake output.

[0004] The filter aid contains chemical groups that can interact with the particle surface and has a bonding bridging effect. The active groups exposed after its dissolution adsorb the suspended particles in the pulp to form flocs, increasing the filter cake space. However, the addition of the filter aid should be appropriate. Excessive filter aid will cause the surface of the tailings particles to be completely adsorbed without adsorption sites, making the filter aid lose its bridging effect and forming stable particles without vacancies. At the same time, due to the steric hindrance effect of the polymer adsorption film, the mineral particles repel each other, and the particles return to a stable dispersion state, unable to form large-size flocs. The mineral particles wrapped by the filter aid form a relatively dense structure, which is not conducive to filtrate penetration. In addition, excessive filter aid will increase the filtrate viscosity, increase the seepage resistance, further reduce the filtrate penetration speed, and also reduce the filtration pressure drop and filter cake output.

[0005] Therefore, to ensure the dehydration effect, when adding coarse materials and filter aids to the pulp, there is an optimal ratio among the volume of the pulp, the dosage of the coarse materials, and the dosage of the filter aid.

[0006] In the prior art, when the factory dehydrates the pulp, it usually detects the characteristics of the pulp such as concentration and particle size through instruments such as an on-line particle size analyzer and an on-line fluorescence spectrometer, and then performs pre-treatment of adding coarse materials and filter aids to the pulp and controls the working parameters of the filtration equipment. This method is expected to achieve intelligent control of the pressure filtration process, reduce the moisture content of the filter cake after dehydration, and improve the pressure filtration efficiency.

[0007] However, in actual production, the pulp is complex and diverse, and the detection instruments cannot accurately detect the pulp. The detection results of the existing detection instruments are not accurate enough, and the data of the feeding characteristics have no direct relationship with the filtration efficiency and the cake quality, so it is impossible to accurately guide the subsequent chemical addition and coarse material mixing work, and it is difficult to achieve precise control of the filtration work, resulting in the production problem of difficult dehydration and reducing the dehydration effect of the dehydration equipment. Summary of the Invention

[0008] The present invention provides a material dehydration and chemical addition system to solve the problem of poor dehydration effect of the existing filtration dehydration device.

[0009] The present invention provides a material dehydration and chemical addition system, which includes: an on-line dehydration device, the on-line dehydration device includes a feeding pipeline and a feeding tank, and the feeding pipeline is communicated with the feeding tank; a sampling dehydration device, the sampling dehydration device includes a sampling component, a chemical addition component, a coarse material mixing component, a distributor and a plurality of filtration components, the distributor has a pulp inlet and a plurality of pulp outlets; the sampling component is respectively communicated with the feeding pipeline and the pulp inlet to transport the pulp in the feeding pipeline to the pulp inlet; the chemical addition component is respectively communicated with the pulp inlet and the feeding tank to transport the filter aid to the pulp inlet and the feeding tank; the coarse material mixing component is respectively communicated with the pulp inlet and the feeding tank to transport the coarse material to the pulp inlet and the feeding tank; the plurality of pulp outlets are arranged in one-to-one correspondence with the plurality of filtration components, and the filtration components can filter the pulp added with the filter aid and / or the coarse material; a detection system, arranged on the filtration components to detect the filtration effect of the filtration components; a control system, the control system can control the pulp amount, the filter aid amount and the coarse material amount introduced into the pulp inlet, and the control system is electrically connected with the detection system, and the detection system can transmit signals to the control system to control the pulp amount, the filter aid amount and the coarse material amount added to the feeding tank.

[0010] Further, the sampling dehydration device further includes: a cleaning component to clean the filter cake on the filtration components, and the control system is electrically connected with the cleaning component; a dehydration component, communicated with the plurality of filtration components to dehydrate the pulp in the filtration components, and the control system is electrically connected with the dehydration component.

[0011] Further, the chemical addition component includes: a chemical agent tank, the chemical agent tank is respectively communicated with the pulp inlet and the feeding tank; a first filter aid flowmeter and a first filter aid solenoid valve, arranged between the chemical agent tank and the pulp inlet to control the filter aid amount introduced into the pulp inlet; a second filter aid flowmeter and a second filter aid solenoid valve, arranged between the chemical agent tank and the feeding tank to control the filter aid amount added to the feeding tank.

[0012] Further, the coarse material mixing component further includes: a coarse material bin having a coarse material outlet; a weighing structure disposed within the coarse material bin and near the coarse material outlet; a feeder disposed at the coarse material outlet, the feeder having a material inlet and a material outlet, the material inlet communicating with the coarse material outlet to convey the coarse material in the coarse material bin to the outside; a dryer disposed on the feeder to dry the coarse material within the feeder; a conveyor disposed below the material outlet, one end of the conveyor communicating with the pulp inlet, and the other end of the conveyor communicating with the feed tank.

[0013] Further, the filtering component includes: a filter disc corresponding to the pulp outlet, the filter disc having a first filtrate outlet disposed at the bottom of the filter disc, the first filtrate outlet communicating with the dehydration component; a filter cloth disposed on the filter disc, and the pulp having a filter aid and / or coarse material is conveyed onto the filter cloth.

[0014] Further, the sampling and dehydration device further includes a connecting frame, and the filtering component further includes: a connecting pipe, one end of the connecting pipe communicating with the pulp outlet, the connecting pipe being disposed on the connecting frame; a fixing ring corresponding to the other end of the connecting pipe, the fixing ring being capable of moving up and down relative to the connecting frame, the fixing ring having an initial position and an occlusion position disposed opposite to each other. When the fixing ring is in the initial position, the top of the fixing ring abuts against the bottom of the connecting frame. When the fixing ring is in the occlusion position, the fixing ring is placed on the filter disc; a telescopic rod having a fixed end and a telescopic end disposed opposite to each other, the fixed end being fixed on the connecting frame, and the telescopic end being connected to the side wall of the fixing ring to drive the fixing ring to move between the initial position and the occlusion position.

[0015] Further, the cleaning component includes: a clean water tank; a clean water pump having a clean water inlet and a clean water outlet disposed opposite to each other, the clean water inlet communicating with the clean water tank, and the clean water outlet corresponding to the filter disc to remove the filter cake on the filter cloth.

[0016] Further, the dehydration component includes: a filtering bottle communicating with the first filtrate outlet to collect the filtrate; a vacuum pump communicating with the filtering bottle to dehydrate the pulp within the filter disc; a buffer bottle disposed between the filtering bottle and the vacuum pump, the buffer bottle communicating with the filtering bottle and the vacuum pump respectively, and the vacuum pump communicating with the filtering bottle through the buffer bottle.

[0017] Further, the detection system includes a plurality of pressure gauges, which are arranged in one-to-one correspondence with a plurality of filter components. The pressure gauges are arranged between the first filtrate outlet and the filter bottle and are electrically connected to the control system. Each pressure gauge includes: a pressure detection sensor for detecting the pressure of the pulp in the filter disc, so as to obtain the pressure value of the pulp; a timing module for recording the change value of the pressure of the pulp in the filter disc over time; a microprocessor for processing the pressure value of the pulp and the change value of the pressure of the pulp, so as to obtain the flow rate of the filtrate; a storage module for storing the pressure value of the pulp, the pressure change value, and the flow rate of the filtrate; and a wireless transmission module for transmitting the data in the storage module to the control system.

[0018] Further, the control system includes: a host computer, which can receive and process the signals from the wireless transmission module and is electrically connected to the water pump and the vacuum pump to control the operation of the water pump and the vacuum pump; and a display, which is electrically connected to the host computer and can display the data processed by the host computer.

[0019] Further, the on-line dehydration device includes: a feed pump, which has a feed inlet and a feed outlet, and the feed inlet is communicated with the feed tank; and a dehydration device, which is communicated with the feed outlet to dehydrate the pulp in the feed tank.

[0020] Further, the filter disc has a second filtrate outlet, and the sampling and dehydration device further includes a waste liquid tank, which is communicated with the filter bottle and the second filtrate outlet respectively.

[0021] By applying the technical solution of the present invention, the sampling component in the sampling and dehydration device obtains the pulp from the feed pipeline of the on-line dehydration device and transports it to the distributor through the pulp inlet. The amount of pulp transported by the sampling component each time is the same. At the same time, the control system controls the dosing component and the coarse material mixing component to add different amounts of filter aid and coarse material respectively, and transports them to different filter components through different pulp outlets. A plurality of filter components can perform filtration processing simultaneously. The detection system transmits the detected filtration effect to the control system. The control system can display the detection results of the detection system and can determine the optimal addition amounts of the filter aid and the coarse material, so as to determine the optimal ratio among the volume of the pulp, the amount of the filter aid, and the amount of the coarse material. Furthermore, the control system controls the feed pipeline, the dosing component, and the coarse material mixing component to inject the pulp, the filter aid, and the coarse material into the feed tank in the optimal ratio respectively. With the above structure, the detection results of the sampling and dehydration device can accurately guide the subsequent dosing and coarse material mixing work in the factory, and further can achieve precise control of the pressure filtration work, solve the problem of difficult dehydration, improve the dehydration effect of the on-line dehydration device, and at the same time, there is no need to accurately detect the pulp, reduce the labor intensity of the staff, and improve the work efficiency of dehydration. Description of the Drawings

[0022] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 shows a schematic structural diagram of a material dehydration dosing system provided according to an embodiment of the present invention;

[0024] Figure 2 shows a schematic structural diagram of a pressure gauge provided according to an embodiment of the present invention.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10. On-line dehydration device; 11. Feed pipeline; 12. Feed tank; 13. Feed pump; 14. Dehydration equipment

[0027] 20. Sampling dehydration device; 21. Sampling assembly; 211. Inlet solenoid valve; 212. Inlet flowmeter;

[0028] 22. Dosing assembly; 221. Reagent tank; 222. First filter aid flowmeter; 223. First filter aid solenoid valve; 224. Second filter aid flowmeter; 225. Second filter aid solenoid valve;

[0029] 23. Coarse material mixing assembly; 231. Coarse material bin; 232. Weighing structure; 233. Feeder; 234. Dryer; 235. Conveyor;

[0030] 24. Distributor; 241. Pulp inlet; 242. Pulp outlet;

[0031] 25. Filtering assembly; 251. Filter disc; 252. Filter cloth; 253. Connecting pipe; 254. Fixed ring; 255. Telescopic rod;

[0032] 26. Cleaning assembly; 261. Clear water tank; 262. Clear water pump;

[0033] 27. Dehydration assembly; 271. Filtering bottle; 272. Vacuum pump; 273. Buffer bottle;

[0034] 28. Waste liquid tank;

[0035] 30. Detection system; 31. Pressure gauge; 311. Pressure detection sensor; 312. Timing module; 313. Microprocessor; 314. Storage module; 315. Wireless transmission module; 316. Power supply;

[0036] 40. Control system; 41. Host computer; 42. Display. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0038] As Figure 1 shown, the present application provides a material dehydration dosing system, which includes an on-line dehydration device 10, a sampling dehydration device 20, a detection system 30, and a control system 40. The on-line dehydration device 10 is an actual dehydration device in the factory, and the sampling dehydration device 20 is a small-scale test dehydration device. The on-line dehydration device 10 includes a feed pipe 11 and a feed tank 12, and the feed pipe 11 is communicated with the feed tank 12. The sampling dehydration device 20 includes a sampling component 21, a dosing component 22, a coarse material mixing component 23, a distributor 24, and a plurality of filter components 25. The distributor 24 has a pulp inlet 241 and a plurality of pulp outlets 242. The sampling component 21 is respectively communicated with the feed pipe 11 and the pulp inlet 241 to convey the pulp in the feed pipe 11 to the pulp inlet 241. The dosing component 22 is respectively communicated with the pulp inlet 241 and the feed tank 12 to convey the filter aid to the pulp inlet 241 and the feed tank 12. The coarse material mixing component 23 is respectively communicated with the pulp inlet 241 and the feed tank 12 to convey the coarse material to the pulp inlet 241 and the feed tank 12. The plurality of pulp outlets 242 are arranged in one-to-one correspondence with the plurality of filter components 25, and the filter components 25 can filter the pulp added with the filter aid and / or the coarse material. The detection system 30 is arranged on the filter component 25 to detect the filtering effect of the filter component 25. The control system 40 can control the pulp amount, filter aid amount, and coarse material amount introduced into the pulp inlet 241, and the control system 40 is electrically connected to the detection system 30. The detection system 30 can transmit signals to the control system 40 to control the pulp amount, filter aid amount, and coarse material amount added to the feed tank 12.

[0039] Applying the technical solution of the present application, in the sampling and dehydration device 20, the sampling assembly 21 obtains pulp from the feed pipeline 11 of the online dehydration device 10 and transports it to the distributor 24 through the pulp inlet 241. The amount of pulp transported by the sampling assembly 21 each time is the same. At the same time, the control system 40 controls the dosing assembly 22 and the coarse material mixing assembly 23 to add different amounts of filter aid and coarse material respectively, and transports them to different filter assemblies 25 through different pulp outlets 242. Multiple filter assemblies 25 can perform filtration processing simultaneously. The detection system 30 transmits the detected filtration effect to the control system 40. The control system 40 can display the detection results of the detection system 30 and can determine the optimal addition amounts of the filter aid and the coarse material, so as to determine the optimal ratio among the volume of the pulp, the amount of the filter aid, and the amount of the coarse material. Furthermore, the control system 40 controls the feed pipeline 11, the dosing assembly 22, and the coarse material mixing assembly 23 to inject the pulp, the filter aid, and the coarse material into the feed tank 12 at the optimal ratio respectively. With the above structure, the detection results of the sampling and dehydration device 20 can accurately guide the subsequent dosing and coarse material mixing work in the factory, and further can achieve precise control of the pressure filtration work, solve the problem of difficult dehydration, improve the dehydration effect of the online dehydration device 10, and at the same time, there is no need to accurately detect the pulp, reduce the labor intensity of the staff, and improve the work efficiency of dehydration.

[0040] Among them, in the present application, the sampling assembly 21 includes a feed solenoid valve 211 and a feed flowmeter 212 to control the flow rate of the pulp. The feed solenoid valve 211 and the feed flowmeter 212 are electrically connected to the control system 40.

[0041] Among them, in the prior art, the filter aid or coarse material added in the dehydration device is generally manually configured and added. Due to many factors such as changes in the state of the pulp, different personal experiences and operating habits of the staff, it is very difficult to master the accurate ratio of the manually added filter aid or coarse material, resulting in large errors and unevenness in the added coarse material or filter aid, causing low product quality and poor effect in filtration, high manual labor intensity and high cost, and affecting the filtration efficiency. However, with the above structure, the control system 40 can control the feed pipeline 11, the dosing assembly 22, and the coarse material mixing assembly 23 to inject the pulp, the filter aid, and the coarse material into the feed tank 12 at the optimal ratio respectively, which can ensure the accuracy of the ratio, reduce the errors of the added coarse material and filter aid, improve the product quality of filtration, and at the same time can reduce the labor intensity and labor cost of the staff and improve the efficiency of filtration and dehydration.

[0042] Furthermore, only the filter aid can be added in the distributor 24 and the feed tank 12, or only the coarse material can be added, or both the filter aid and the coarse material can be added simultaneously.

[0043] Specifically, the filter aid in the chemical agent tank 221 includes polyacrylamide, polyethylene oxide, cationic starch, chitosan, polyethyleneimine, and polyamide. The composition of the coarse material in the coarse material bin 231 includes sawdust, coarse tailings, and diatomaceous earth.

[0044] Among them, the sampling and dehydration device 20 further includes a cleaning component 26 and a dehydration component 27. The cleaning component 26 is used to clean the filter cake on the filter component 25, and the control system 40 is electrically connected to the cleaning component 26. With such a setting, the cleaning component 26 can clean the filter cake on the filter component 25, further reducing the labor intensity of the staff, facilitating the continuous dehydration work of the sampling and dehydration device 20, and improving the working efficiency of the sampling and dehydration device 20. The dehydration component 27 is communicated with a plurality of filter components 25 to dehydrate the pulp in the filter components 25, and the control system 40 is electrically connected to the dehydration component 27. The dehydration component 27 can dehydrate the pulp in the filter components 25 simultaneously, improving the dehydration efficiency of the sampling and dehydration device 20. The control system 40 is electrically connected to the cleaning component 26 and the dehydration component 27, which can further improve the automation degree of the sampling and dehydration device 20.

[0045] Specifically, the chemical agent adding component 22 includes a chemical agent tank 221, a first filter aid flowmeter 222, a first filter aid solenoid valve 223, a second filter aid flowmeter 224, and a second filter aid solenoid valve 225. The chemical agent tank 221 is respectively communicated with the pulp inlet 241 and the feeding tank 12. The first filter aid flowmeter 222 and the first filter aid solenoid valve 223 are arranged between the chemical agent tank 221 and the pulp inlet 241 to control the amount of filter aid introduced into the pulp inlet 241. The second filter aid flowmeter 224 and the second filter aid solenoid valve 225 are arranged between the chemical agent tank 221 and the feeding tank 12 to control the amount of filter aid added to the feeding tank 12. With such a setting, it is convenient to accurately control the dosage of the filter aid added to the distributor 24 and the feeding tank 12, ensuring the accuracy of the sampling test in the sampling and dehydration device 20 and at the same time ensuring the dehydration effect of the pulp in the on-line dehydration device 10.

[0046] Among them, the control system 40 is electrically connected to the first filter aid flowmeter 222, the first filter aid solenoid valve 223, the second filter aid flowmeter 224, and the second filter aid solenoid valve 225. The control system 40 can control the opening and closing of the first filter aid solenoid valve 223 and the second filter aid solenoid valve 225, and the first filter aid flowmeter 222 and the second filter aid flowmeter 224 can transmit signals to the control system 40.

[0047] Further, the coarse material mixing component 23 further includes a coarse material bin 231, a weighing structure 232, a feeder 233, a dryer 234, and a conveyor 235. The coarse material bin 231 has a coarse material outlet. The weighing structure 232 is disposed within the coarse material bin 231 and is close to the coarse material outlet. With such an arrangement, the dosage of the coarse material can be accurately controlled. Among them, the weighing structure 232 is electrically connected to the control system 40. The feeder 233 is disposed at the coarse material outlet. The feeder 233 has a material inlet and a material outlet. The material inlet is communicated with the coarse material outlet to convey the coarse material in the coarse material bin 231 to the outside. In this application, the feeder 233 is a screw conveyor. With such an arrangement, it is convenient to transport the coarse material. The dryer 234 is disposed on the feeder 233 to dry the coarse material in the feeder 233. The dryer 234 can prevent the coarse material from being damp and blocking the feeder 233, ensuring the normal operation of the feeder 233. The conveyor 235 is disposed below the material outlet. One end of the conveyor 235 is communicated with the pulp inlet 241, and the other end of the conveyor 235 is communicated with the charging tank 12. The conveyor 235 is a belt conveyor 235. When the conveyor 235 rotates forward, the coarse material can be transferred to the distributor 24. When the conveyor 235 rotates in reverse, the coarse material can be transferred to the charging tank 12. With such an arrangement, it is convenient to control and the structure is simple. Among them, the conveyor 235 is electrically connected to the control system 40, and the control system 40 controls the forward and reverse rotation of the conveyor 235.

[0048] Among them, the filtering component 25 includes a filter disc 251 and a filter cloth 252. The filter disc 251 is correspondingly disposed with the pulp outlet 242. The filter disc 251 has a first filtrate outlet, and the first filtrate outlet is disposed at the bottom of the filter disc 251 and is communicated with the dewatering component 27. The filter cloth 252 is disposed on the filter disc 251, and the pulp containing the filter aid and / or the coarse material is conveyed onto the filter cloth 252. With such an arrangement, it is convenient to filter and dewater the pulp added with the filter aid and / or the coarse material. The particles in the pulp can be retained on the filter cloth 252, and the filtrate is discharged from the first filtrate outlet, thereby completing the filtering and dewatering work.

[0049] Further, the sampling and dehydration device 20 further includes a connecting frame, and the filtering assembly 25 further includes a connecting pipe 253, a fixing ring 254, and a telescopic rod 255. One end of the connecting pipe 253 communicates with the pulp outlet 242, and the connecting pipe 253 is arranged on the connecting frame. The fixing ring 254 is correspondingly arranged at the other end of the connecting pipe 253. The fixing ring 254 can move up and down relative to the connecting frame. The fixing ring 254 has an initial position and an occlusion position which are oppositely arranged. When the fixing ring 254 is in the initial position, the top of the fixing ring 254 abuts against the bottom of the connecting frame. When the fixing ring 254 is in the occlusion position, the fixing ring 254 is placed on the filter disc 251. The telescopic rod 255 has a fixed end and a telescopic end which are oppositely arranged. The fixed end is fixed on the connecting frame, and the telescopic end is connected to the side wall of the fixing ring 254 to drive the fixing ring 254 to move between the initial position and the occlusion position. Among them, the telescopic rod 255 is electrically connected to the control system 40. With such an arrangement, when filtering the pulp, the telescopic rod 255 controls the fixing ring 254 to move to the occlusion position, and then the connecting pipe 253 conveys the pulp into the fixing ring 254 to prevent the pulp from overflowing from the filter disc 251. With such an arrangement, the structure is simple and it is convenient to filter the pulp.

[0050] Specifically, the cleaning assembly 26 includes a clear water tank 261 and a clear water pump 262. The clear water pump 262 has a clear water inlet and a clear water outlet which are oppositely arranged. The clear water inlet communicates with the clear water tank 261, and the clear water outlet is correspondingly arranged with the filter disc 251 to remove the filter cake on the filter cloth 252. With such an arrangement, it is convenient to clean the filter cake, convenient to operate, and can ensure the cleaning effect at the same time. Among them, when the clear water pump 262 removes the filter cake, the telescopic rod 255 controls the fixing ring 254 to move to the initial position to prevent the fixing ring 254 from affecting the cleaning work of the clear water pump 262. Among them, the clear water pump 262 is electrically connected to the control system 40, and the control system 40 can control the operation of the clear water pump 262.

[0051] Among them, the dehydration assembly 27 includes a filtering bottle 271, a vacuum pump 272, and a buffer bottle 273. The filtering bottle 271 communicates with the first filtrate outlet to collect the filtrate, which is convenient for the unified discharge of the filtrate. The vacuum pump 272 communicates with the filtering bottle 271 to dehydrate the pulp in the filter disc 251. The buffer bottle 273 is arranged between the filtering bottle 271 and the vacuum pump 272. The buffer bottle 273 communicates with the filtering bottle 271 and the vacuum pump 272 respectively. The vacuum pump 272 communicates with the filtering bottle 271 through the buffer bottle 273. With such an arrangement, the buffer bottle 273 can prevent the filtrate from entering the vacuum pump 272, and the buffer bottle 273 can protect the vacuum pump 272, so as to ensure the normal operation of the vacuum pump 272 and improve the service life of the vacuum pump 272.

[0052] As Figure 2As shown, the detection system 30 includes a plurality of pressure gauges 31, which are arranged in one-to-one correspondence with a plurality of filter components 25. The pressure gauges 31 are arranged between the first filtrate outlet and the filter bottle 271 and are electrically connected to the control system 40. The pressure gauges 31 can detect the pressure value of the filter disc 251 in real time. The pressure gauge 31 includes a pressure detection sensor 311, a timing module 312, a microprocessor 313, a storage module 314, and a wireless transmission module 315. The pressure detection sensor 311 is used to detect the pressure of the pulp in the filter disc 251, so as to obtain the pressure value of the pulp, and the pressure detection sensor 311 can detect the pressure change during the filtration process. The timing module 312 is used to record the pressure change value of the pulp in the filter disc 251 that changes with time, that is, the timing module 312 can record the change of the pressure of the filter disc 251 with time during the filtration process. The microprocessor 313 is used to process the pressure value of the pulp and the pressure change value of the pulp, so as to obtain the flow rate of the filtrate. The storage module 314 is used to store the pressure value of the pulp, the pressure change value, and the flow rate of the filtrate. The wireless transmission module 315 is used to transmit the data of the storage module 314 to the control system 40. With such a setting, the pressure gauge 31 can transmit the accurate process and results during the filtration process to the control system 40 to ensure the accuracy of the sampling and dehydration work. The pressure gauge 31 also includes a power supply 316 to control the opening and closing of the pressure gauge 31.

[0053] Wherein, a filter solenoid valve is arranged below the pressure gauge 31 to control the progress of the filtration and dehydration work, and the filter solenoid valve is electrically connected to the control system 40.

[0054] Further, the control system 40 includes a host computer 41 and a display 42. The host computer 41 can receive and process the signal of the wireless transmission module 315, and the host computer 41 is electrically connected to the water pump 262 and the vacuum pump 272 to control the operation of the water pump 262 and the vacuum pump 272. The display 42 is electrically connected to the host computer 41, and the display 42 can display the data processed by the host computer 41. With such a setting, the automation degree of the sampling and dehydration device 20 is improved, which is convenient for controlling the sampling and dehydration device 20. At the same time, the staff can know the data of the sampling and dehydration device 20 during the working process through the display 42.

[0055] Wherein, the on-line dehydration device 10 includes a feed pump 13 and a dehydration device 14. The feed pump 13 has a feed inlet and a feed outlet, and the feed inlet is communicated with the feed tank 12. The dehydration device 14 is communicated with the feed outlet to dehydrate the pulp in the feed tank 12. With such a setting, the feed tank 12 can play a role in mixing the pulp, the filter aid, and the coarse material, ensuring that the filter aid and the coarse material are fully mixed with the pulp. The feed pump 13 can transport the mixed pulp to the dehydration device 14 to ensure the smooth progress of the dehydration work.

[0056] Specifically, the filter disc 251 has a second filtrate outlet, and the sampling and dewatering device 20 further includes a waste liquid tank 28. The waste liquid tank 28 is respectively communicated with the filter bottle 271 and the second filtrate outlet. When the filter cloth 252 is cleaned by the water pump 262, the waste liquid can be transported to the waste liquid tank 28 through the second filtrate outlet. The waste liquid tank 28 can collect the waste liquid and the filtrate, facilitating subsequent cleaning of the waste liquid and the filtrate. Among them, there is a waste liquid solenoid valve between the waste liquid tank 28 and the filter bottle 271 to control the discharge of the waste liquid.

[0057] To better understand the technical solution of the present application, the specific working process of the material dehydration and dosing system is as follows:

[0058] 1. Turn on the pressure gauge 31, the upper computer 41 and the display 42 to detect the filtration pressure of the filter disc 251 in real time;

[0059] 2. The upper computer 41 controls the telescopic rod 255 to press the fixing ring 254 against the filter disc 251 covering the upper layer of the filter cloth 252;

[0060] 3. The upper computer 41 takes a certain volume of pulp in the feeding pipeline 11 by controlling the feeding solenoid valve 211 and the feeding flowmeter 212; the upper computer 41 controls the chemical agent tank 221 to add different dosages of filter aid respectively; and / or, the upper computer 41 controls the coarse material bin 231 to add different dosages of coarse materials respectively. The distributor 24 transports the pulp with different dosages of filter aid and / or different dosages of coarse materials to different filter chambers through the connecting pipe 253 respectively, and multiple groups of filtration comparison experiments are carried out simultaneously;

[0061] 4. The fixing ring 254 presses the filter disc 251 covering the upper layer of the filter cloth 252 to form a receiving cavity. After the upper computer 41 opens the filtration solenoid valve below the pressure gauge 31, it controls the vacuum pump 272 to filter the pulp in the receiving cavity. The filtrate enters the filter bottle 271 through the filter cloth 252 and finally is discharged into the waste liquid tank 28 through the waste liquid solenoid valve;

[0062] 5. The pressure detection sensor 311 in the pressure gauge 31 detects the pressure change during the filtration process. The microprocessor 313 records the change of the pressure in the filter chamber with time according to the pressure detection sensor 311 and the timing module 312, and calculates the flow rate of the filtrate during the filtration process; the data is recorded in the storage module 314 and transmitted to the upper computer 41 through the wireless transmission module 315. The upper computer 41 processes the data and displays it on the display 42; meanwhile, the data of the filter aid addition amount in the chemical agent tank 221 and the coarse material addition amount in the coarse material bin 231 are both processed by the upper computer 41 and then displayed on the display 42;

[0063] 6. The reading on the pressure gauge 31 drops to the set value (usually 0.01 Mpa), the upper computer 41 closes the filtration solenoid valve below the pressure gauge 31, the vacuum pump 272 stops working, the filtration process ends, the upper computer 41 separates the fixing ring 254 from the filter disc 251 by controlling the telescopic rod 255, the water pump 262 pumps the clear water in the clear water tank 261 to wash the filter cloth 252, and the washing waste liquid flows into the waste liquid tank 28;

[0064] 7. The upper computer 41 determines the optimal dosage of the filter aid and the addition amount of the coarse material, and controls the addition of the coarse material and the filter aid into the feed tank 12.

[0065] For example, the filtration performance of the coarse ore pulp with a mass concentration of 20% added with polyacrylamide solutions of 0, 20 g / t, 40 g / t, and 60 g / t respectively is detected using this device (the addition amount of the coarse material remains unchanged). The results show that the filtration times of the ore pulp added with 0, 20 g / t, 40 g / t, and 60 g / t polyacrylamide solutions are 124 s, 88 s, 119 s, and 136 s respectively. The results indicate that the filtration performance of the ore pulp is the best after adding 20 g / t polyacrylamide solution to the coarse ore pulp with a mass concentration of 20%.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, top, bottom, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanations, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0069] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" and the like can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0070] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0071] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A material dehydration and dosing system, characterized in that, The material dehydration and dosing system includes: An on-line dehydration device (10), which includes a feed pipeline (11) and a feed tank (12), and the feed pipeline (11) is communicated with the feed tank (12); A sampling dehydration device (20), which includes a sampling assembly (21), a dosing assembly (22), a coarse material mixing assembly (23), a distributor (24) and a plurality of filtering assemblies (25). The distributor (24) has a pulp inlet (241) and a plurality of pulp outlets (242). The sampling assembly (21) is respectively communicated with the feed pipeline (11) and the pulp inlet (241) to transport the pulp in the feed pipeline (11) to the pulp inlet (241). The dosing assembly (22) is respectively communicated with the pulp inlet (241) and the feed tank (12) to transport a filter aid to the pulp inlet (241) and the feed tank (12). The coarse material mixing assembly (23) is respectively communicated with the pulp inlet (241) and the feed tank (12) to transport coarse materials to the pulp inlet (241) and the feed tank (12). The plurality of pulp outlets (242) are arranged in one-to-one correspondence with the plurality of filtering assemblies (25), and the filtering assemblies (25) can filter the pulp added with the filter aid and / or the coarse materials; A detection system (30), which is arranged on the filtering assembly (25) to detect the filtering effect of the filtering assembly (25); A control system (40), which can control the amount of pulp, the amount of filter aid and the amount of coarse materials introduced into the pulp inlet (241). The control system (40) is electrically connected with the detection system (30), and the detection system (30) can transmit signals to the control system (40) to control the amount of pulp, the amount of filter aid and the amount of coarse materials added to the feed tank (12).

2. The material dehydration and dosing system according to claim 1, characterized in that The sampling dehydration device (20) further includes: A cleaning assembly (26) to clean the filter cake on the filtering assembly (25), and the control system (40) is electrically connected with the cleaning assembly (26); A dehydration assembly (27), which is communicated with the plurality of filtering assemblies (25) to dehydrate the pulp in the filtering assemblies (25), and the control system (40) is electrically connected with the dehydration assembly (27).

3. The material dehydration and chemical addition system according to claim 1, characterized in that The dosing assembly (22) includes: A reagent tank (221), which is respectively communicated with the pulp inlet (241) and the feed tank (12); A first filter aid flowmeter (222) and a first filter aid solenoid valve (223), which are arranged between the reagent tank (221) and the pulp inlet (241) to control the amount of filter aid introduced into the pulp inlet (241); A second filter aid flowmeter (224) and a second filter aid solenoid valve (225), which are arranged between the reagent tank (221) and the feed tank (12) to control the amount of filter aid added to the feed tank (12).

4. The material dehydration and chemical addition system according to claim 1, characterized in that, The coarse material mixing assembly (23) further includes: Coarse material bin (231), having a coarse material outlet; Weighing structure (232), arranged inside the coarse material bin (231) and near the coarse material outlet; Feeder (233), arranged at the coarse material outlet, the feeder (233) having a material inlet and a material outlet, the material inlet communicating with the coarse material outlet to convey the coarse material in the coarse material bin (231) to the outside; Dryer (234), arranged on the feeder (233) to dry the coarse material in the feeder (233); Conveyor (235), arranged below the material outlet, one end of the conveyor (235) communicating with the pulp inlet (241), the other end of the conveyor (235) communicating with the feed tank (12).

5. The material dehydration and dosing system according to claim 2, wherein, The filtration assembly (25) includes: Filter disc (251), the filter disc (251) being arranged corresponding to the pulp outlet (242), the filter disc (251) having a first filtrate outlet, the first filtrate outlet being arranged at the bottom of the filter disc (251), the first filtrate outlet communicating with the dehydration assembly (27); Filter cloth (252), arranged on the filter disc (251), and the pulp with the filter aid and / or the coarse material is conveyed onto the filter cloth (252).

6. The material dehydration and chemical addition system according to claim 5, wherein The sampling and dehydration device (20) further includes a connecting frame, and the filtration assembly (25) further includes: Connecting pipe (253), one end of the connecting pipe (253) communicating with the pulp outlet (242), the connecting pipe (253) being arranged on the connecting frame; Fixed ring (254), arranged corresponding to the other end of the connecting pipe (253), the fixed ring (254) being able to move up and down relative to the connecting frame, the fixed ring (254) having an initial position and an occlusion position arranged opposite to each other. When the fixed ring (254) is in the initial position, the top of the fixed ring (254) abuts against the bottom of the connecting frame. When the fixed ring (254) is in the occlusion position, the fixed ring (254) is placed on the filter disc (251); Expansion rod (255), having a fixed end and a telescopic end arranged opposite to each other, the fixed end being fixed on the connecting frame, the telescopic end being connected to the side wall of the fixed ring (254) to drive the fixed ring (254) to move between the initial position and the occlusion position.

7. The material dehydration and chemical addition system according to claim 5, characterized in that, The cleaning assembly (26) includes: Clean water tank (261); Clean water pump (262), having a clean water inlet and a clean water outlet arranged opposite to each other, the clean water inlet communicating with the clean water tank (261), the clean water outlet being arranged corresponding to the filter disc (251) to remove the filter cake on the filter cloth (252).

8. The material dehydration and chemical dosing system according to claim 7, characterized in that, The dehydration assembly (27) includes: Filter bottle (271), communicating with the first filtrate outlet to collect the filtrate; Vacuum pump (272), communicating with the filter bottle (271) to dehydrate the pulp in the filter disc (251); A buffer bottle (273) is provided between the filtration bottle (271) and the vacuum pump (272). The buffer bottle (273) is respectively communicated with the filtration bottle (271) and the vacuum pump (272). The vacuum pump (272) is communicated with the filtration bottle (271) through the buffer bottle (273).

9. The material dehydration and dosing system according to claim 8, wherein The detection system (30) includes a plurality of pressure gauges (31). The plurality of pressure gauges (31) are arranged in one-to-one correspondence with the plurality of filtration components (25). The pressure gauge (31) is arranged between the first filtrate outlet and the filtration bottle (271). The pressure gauge (31) is electrically connected to the control system (40). The pressure gauge (31) includes: A pressure detection sensor (311) for detecting the pressure of the pulp in the filter disc (251), so as to obtain the pressure value of the pulp; A timing module (312) for recording the pressure change value of the pulp in the filter disc (251) changing with time; A microprocessor (313) for processing the pressure value of the pulp and the pressure change value of the pulp, so as to obtain the flow rate of the filtrate; A storage module (314) for storing the pressure value of the pulp, the pressure change value and the flow rate of the filtrate; A wireless transmission module (315) for transmitting the data of the storage module (314) to the control system (40).

10. The material dehydration and dosing system according to claim 9, characterized in that, The control system (40) includes: A host computer (41). The host computer (41) can receive and process the signal of the wireless transmission module (315), and the host computer (41) is electrically connected to the water pump (262) and the vacuum pump (272) to control the operation of the water pump (262) and the vacuum pump (272); A display (42) electrically connected to the host computer (41). The display (42) can display the data processed by the host computer (41).

11. The material dehydration and dosing system according to claim 1, characterized in that, The online dehydration device (10) includes: A feed pump (13). The feed pump (13) has a feed inlet and a feed outlet. The feed inlet is communicated with the feed tank (12); A dehydration device (14) communicated with the feed outlet to dehydrate the pulp in the feed tank (12).

12. The material dehydration and chemical addition system according to claim 8, characterized in that, The filter disc (251) has a second filtrate outlet. The sampling and dehydration device (20) further includes a waste liquid tank (28). The waste liquid tank (28) is respectively communicated with the filtration bottle (271) and the second filtrate outlet.

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