Lithium sulfate brine precision filtering device

Abstract

The utility model provides a lithium sulfate brine precision filtering device which comprises a tank body, a thick slurry opening is formed in the bottom of the tank body, a feeding opening and a fourth standby opening are formed in the positions, located on the left side and the right side of the thick slurry opening, of the surface of the tank body respectively, and a connecting pipe is arranged on the surface of the tank body. A high-pressure gas inlet and a liquid outlet are formed in the left end and the right end of the connecting pipe respectively, a third standby port and a sampling port are formed in one side of the surface of the connecting pipe respectively, and a water inlet is formed in the connecting pipe; and a first standby opening and an emptying opening are respectively formed in the left side and the right side of the surface of the tank body. According to the lithium sulfate brine precise filtering device provided by the utility model, lithium sulfate brine is fed into the tank body through the delivery pump and is filtered through the microporous filter pipe and the high-precision filter element under pressure, and filtered clear liquid flows out of the filter element and is collected through the side discharging system.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical engineering, in particular to a precision filtration device for lithium sulfate brine. Background Art

[0002] Lithium sulfate brine is an important chemical raw material, which is widely used in industries such as batteries, ceramics, and glass. During the production process of lithium sulfate brine, it is necessary to carry out precision filtration to remove impurities therein and improve product quality.

[0003] At present, there are many deficiencies in the existing precision filtration devices for lithium sulfate brine. Although the cartridge filter can achieve a high filtration accuracy, the filter element is easily blocked by tiny particles in the brine during the filtration process. This not only reduces the filtration efficiency but also requires frequent replacement of the filter element, increasing the maintenance cost and the risk of production interruption. At the same time, different batches of lithium sulfate brine may contain different types and sizes of impurities, making it difficult for the filter element to fully adapt.

[0004] Therefore, it is necessary to provide a precision filtration device for lithium sulfate brine to solve the above technical problems. Summary of the Utility Model

[0005] The utility model provides a precision filtration device for lithium sulfate brine, which solves the problems that the existing precision filtration device for lithium sulfate brine is easily blocked by tiny particles in the brine during the filtration process, not only reducing the filtration efficiency but also requiring frequent replacement of the filter element, increasing the maintenance cost and the risk of production interruption. At the same time, different batches of lithium sulfate brine may contain different types and sizes of impurities, making it difficult for the filter element to fully adapt.

[0006] To solve the above technical problems, a precision filtration device for lithium sulfate brine provided by the utility model includes:

[0007] A tank body, a thick slurry port is arranged at the bottom of the tank body, and a feed port and a fourth spare port are respectively arranged on the surface of the tank body on the left and right sides of the thick slurry port;

[0008] A connecting pipe, the connecting pipe is arranged on the surface of the tank body, a high-pressure air inlet and a liquid outlet are respectively arranged at the left and right ends of the connecting pipe, a third spare port and a sampling port are respectively arranged on one side of the surface of the connecting pipe, and a water inlet is arranged on the connecting pipe;

[0009] A first spare port and a vent port are respectively arranged on the left and right sides of the surface of the tank body.

[0010] Preferably, a tank cover is arranged at the top of the tank body, and a second manhole is arranged at the top of the tank cover.

[0011] Preferably, a first manhole is arranged on one side of the bottom of the surface of the tank body.

[0012] Preferably, a second standby port, a spray port, and a pressure port are respectively arranged on the surface of the tank lid.

[0013] Preferably, a protective cover is arranged on the surface of the connecting pipe, and a groove is formed at the top of the protective cover.

[0014] Preferably, circular through holes are formed at both the left and right ends of the protective cover.

[0015] Preferably, mounting blocks are connected to both the left and right sides of the top of the protective cover, and bolts are arranged inside the mounting blocks.

[0016] Compared with the related art, a lithium sulfate brine precision filtering device provided by the present utility model has the following beneficial effects:

[0017] The present utility model provides a lithium sulfate brine precision filtering device. The lithium sulfate brine is sent into the tank body by a delivery pump, and is filtered under pressure through a microporous filter pipe and a high-precision filter element. The filtered clear liquid flows out from the inside of the filter element and is collected through a side discharge system, while the filter residue remains in the tank body and gradually accumulates to form thick slurry. The control system monitors the pressure and flow rate in the tank body in real time, and automatically adjusts the feeding frequency of the delivery pump and the filtration time period according to the set parameters. When the thick slurry in the tank body reaches the required concentration, the control system starts the backwashing and slag discharging mechanism, and discharges the thick slurry from the tank body by means of high-pressure gas or co-blowing of water and gas. After the filtration is completed, the control system automatically shuts off the delivery pump and related valves, and issues a cleaning and maintenance prompt signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a first embodiment of a lithium sulfate brine precision filtering device provided by the present utility model;

[0019] Figure 2 is Figure 1 a side view of the overall device shown;

[0020] Figure 3 is a schematic structural diagram of a second embodiment of a lithium sulfate brine precision filtering device provided by the present utility model;

[0021] Figure 4 is Figure 3 a three-dimensional structural diagram of the protective cover shown.

[0022] Reference Numerals in the Figures: 1, thick slurry inlet; 2, feed inlet; 3, first manhole; 4, high-pressure air inlet; 5, first spare port; 6, water inlet; 7, second spare port; 8, spray port; 9, pressure port; 10, second manhole; 11, third spare port; 12, sampling port; 13, liquid outlet; 14, vent port; 15, fourth spare port; 16, tank body; 17, connecting pipe;

[0023] 18, protective cover; 19, groove; 20, circular through-hole; 21, mounting block; 22, bolt; 23, tank cover. Detailed Implementation Manner

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] First Embodiment

[0026] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 is a schematic structural view of the first embodiment of a lithium sulfate brine precision filtration device provided by the present utility model; Figure 2 is Figure 1 a side view of the overall device shown. A lithium sulfate brine precision filtration device includes:

[0027] A tank body 16, with a thick slurry inlet 1 provided at the bottom of the tank body 16, and a feed inlet 2 and a fourth spare port 15 are respectively provided on the left and right sides of the surface of the tank body 16 and located on both sides of the thick slurry inlet 1;

[0028] A connecting pipe 17, which is provided on the surface of the tank body 16, with a high-pressure air inlet 4 and a liquid outlet 13 respectively provided at the left and right ends of the connecting pipe 17, a third spare port 11 and a sampling port 12 are respectively provided on one side of the surface of the connecting pipe 17, and a water inlet 6 is provided on the connecting pipe 17;

[0029] A first spare port 5 and a vent port 14 are respectively provided on the left and right sides of the surface of the tank body 16.

[0030] A tank cover 23 is provided at the top of the tank body 16, and a second manhole 10 is provided at the top of the tank cover 23.

[0031] A first manhole 3 is provided on one side of the bottom surface of the tank body 16.

[0032] A second spare port 7, a spray port 8 and a pressure port 10 are respectively provided on the surface of the tank cover 23.

[0033] Device Composition:

[0034] Tank body 23: As the main part of the entire filtration device, it is made of stainless steel, with excellent corrosion resistance and pressure-bearing capacity. The inner wall of the tank body 23 is polished to reduce material wall hanging and cleaning difficulty. The tank body 23 is designed as a fully sealed structure to prevent the leakage of brine and impurity pollution during the filtration process.

[0035] Filtration system: Hang a certain area of microporous filter tubes inside the tank body 23. The surface of the filter tubes is covered with high-precision filter elements. The filter element material is selected as high molecular polyethylene, which has good chemical resistance and wear resistance and can effectively intercept tiny impurities in the brine.

[0036] Side discharge system: Used to collect the filtered clear liquid and discharge the thick slurry during the filtration process. The clear liquid flows out through the inside of the filter element and is collected by the side discharge system, while the filter residue gradually accumulates in the tank body to form a thick slurry, which is discharged through the back-blowing slag discharge mechanism after reaching the required concentration.

[0037] Control system: Includes pressure sensors, flow meters, control valves, and an automatic control system. By real-time monitoring of the pressure and flow inside the tank body, automatically adjust the feeding frequency of the conveying pump, control the working pressure and filtration time cycle of the equipment, so as to realize the fully automatic operation of the equipment. The control system also has alarm and fault diagnosis functions to ensure the safe and stable operation of the equipment.

[0038] The main material of the tank body is 316L stainless steel, the equipment is polished inside, and the working pressure of the equipment ≤ 0.2 Mpa.

[0039] The material of the high-precision filter element is high molecular polyethylene, and the filtration accuracy is 0.1 - 0.5 μm.

[0040] Feeding: Open the filter feeding valve, clarified liquid outlet valve, reflux valve, and vent valve in sequence to ensure the smooth fluid path. Start the pump and transport the lithium sulfate brine to the filter.

[0041] Filtration: Keep the pressure of the filter at 0.001 - 0.05 Mpa. After stabilization, carry out filtration. Real-time monitor the pressure and flow, and adjust the feeding frequency of the pump to keep the flow of the filtered lithium sulfate brine stable within the allowable pressure range.

[0042] Back-blowing: During the filtration process, according to the set parameters, when the filtration pressure exceeds the set pressure, the filtration pressurizing pump stops filtration, carries out backwashing or back-blowing, removes the solid filter cake on the surface of the filter tube into the conical head to form a thick slurry, and then through positive blowing, presses the thick slurry into the thick slurry tank. The clear liquid after filtration automatically backwashes and discharges the thick slurry.

[0043] After the thick slurry is completely discharged, the filter tube can be regenerated by blowing with water and gas again to restore the flux of the filter tube. Check the sealing of the filter connections, lubrication of the moving parts, etc., and clean it up and wait for the next batch to start filtration.

[0044] Regeneration: Blow back from the inside to the outside of the filter tube under a pressure of 0.6 Mpa or by the co-blowing of water and gas to remove residual solid particles and restore the flux of the filter tube. When necessary, the filter tube can be soaked or circulated with a chemical regeneration liquid to remove stubborn pollutants and restore the filtering effect.

[0045] Compared with the related technologies, a lithium sulfate brine precision filtering device provided by the present utility model has the following beneficial effects:

[0046] The present utility model provides a lithium sulfate brine precision filtering device. The lithium sulfate brine is sent into the tank by a delivery pump and filtered through a microporous filter tube and a high-precision filter element under pressure. The filtered clear liquid flows out from the inside of the filter element and is collected through a side discharge system; the filter residue remains in the tank and gradually accumulates to form thick slurry. The control system monitors the pressure and flow rate in the tank in real time and automatically adjusts the feeding frequency of the delivery pump and the filtering time period according to the set parameters. When the thick slurry in the tank reaches the required concentration, the control system starts the blow-back slag discharge mechanism to discharge the thick slurry from the tank by means of high-pressure gas or co-blowing of water and gas. After the filtering is completed, the control system automatically shuts off the delivery pump and related valves and issues a cleaning and maintenance prompt signal.

[0047] Second Embodiment

[0048] Please refer to Figure 3 and Figure 4 , based on a lithium sulfate brine precision filtering device provided in the first embodiment of the present application, a second embodiment of the present application proposes another lithium sulfate brine precision filtering device. The second embodiment is merely a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0049] Specifically, the difference of a lithium sulfate brine precision filtering device provided in the second embodiment of the present application is that, for a lithium sulfate brine precision filtering device, a protective cover 18 is arranged on the surface of the connecting pipe 17, and a groove 19 is opened at the top of the protective cover 18.

[0050] Circular through holes 20 are opened at both the left and right ends of the protective cover 18.

[0051] Mounting blocks 21 are connected to both the left and right sides at the top of the protective cover 18, and bolts 22 are arranged inside the mounting blocks 21.

[0052] The use of the circular through holes 20 and the groove 19 facilitates the connection of components on the connecting pipe 17.

[0053] The working principle of a lithium sulfate brine precision filtering device provided by the present utility model is as follows:

[0054] During use, the protective cover 18 with the groove 19 and two circular through holes 20 is sleeved on the surface of the connecting pipe 17, and then the bolt 22 is used to pass through the mounting block 21 and threadedly connect with the tank body 16.

[0055] Compared with the related art, a precision filtration device for lithium sulfate brine provided by the present utility model has the following beneficial effects:

[0056] The present utility model provides a precision filtration device for lithium sulfate brine. A protective cover 18 with a groove 19 and two circular through holes 20 is arranged between the tank body 1 and the connecting pipe 17, which can play a role in protecting the exposed connecting pipe 17.

[0057] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A precision filtration device for lithium sulfate brine, characterized in that, Including: A tank body, a thick slurry outlet is arranged at the bottom of the tank body, and a feed inlet and a fourth spare port are respectively arranged on the surface of the tank body on the left and right sides of the thick slurry outlet; A connecting pipe, the connecting pipe is arranged on the surface of the tank body, a high-pressure air inlet and a liquid outlet are respectively arranged at the left and right ends of the connecting pipe, a third spare port and a sampling port are respectively arranged on one side of the surface of the connecting pipe, and a water inlet is arranged on the connecting pipe; A first spare port and a vent port are respectively arranged on the left and right sides of the surface of the tank body.

2. The lithium sulfate brine precision filtration device according to claim 1, characterized in that, A tank cover is arranged at the top of the tank body, and a second manhole is arranged at the top of the tank cover.

3. The precision filtration device for lithium sulfate brine according to claim 1, characterized in that, A first manhole is arranged on one side of the bottom of the surface of the tank body.

4. The lithium sulfate brine precision filtration device according to claim 2, characterized in that, A second spare port, a spray port and a pressure port are respectively arranged on the surface of the tank cover.

5. The lithium sulfate brine precision filtration device according to claim 1, wherein, A protective cover is arranged on the surface of the connecting pipe, and a groove is formed in the top of the protective cover.

6. The lithium sulfate brine precision filtration device according to claim 5, wherein, Circular through holes are formed in the left and right ends of the protective cover.

7. The lithium sulfate brine precision filtration device according to claim 5, characterized in that, Mounting blocks are connected to the left and right sides of the top of the protective cover, and bolts are arranged inside the mounting blocks.

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