Solid-liquid mixing and separating device

Abstract

The utility model discloses a solid-liquid mixing and separating device which comprises a first shell, a second shell and a filtering unit, wherein the end parts of the first shell and the second shell are connected to form a closed space; a first cavity is formed in the first shell, a second cavity is formed in the second shell, the filtering unit is arranged between the first cavity and the second cavity, the first cavity is used for mixing solid and liquid to form mixed liquid, and the mixed liquid penetrates through the filtering unit and then enters the second cavity. According to the utility model, the problem of great influence of human factors and environmental factors in a chemical analysis detection experiment is solved, the test stability and accuracy are improved, and the sample is prevented from being polluted.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical analysis and detection of electrode materials, and specifically relates to a solid-liquid mixing and separation device. Background Art

[0002] At present, in the chemical analysis and testing experiments of lithium battery and sodium battery industry, the continuous operation of solid-liquid mixing and filtration is relatively common, such as residual alkali test of lithium battery ternary positive electrode material, residual cobalt test of lithium cobalt oxide material, iron dissolution test of lithium iron phosphate material, etc. However, in the industry, stirring and filtration are carried out separately using equipment or tools. Stirring can generally be done by paddle stirring or magnetic stirrer to complete the mixing of liquid and solid. Filtration is generally carried out using a funnel or suction filtration device to obtain the filtrate and the solid insoluble matter on the filter membrane. This operation mode is very time-consuming and is greatly affected by human and environmental factors, resulting in large fluctuations in test stability and accuracy, and it is easy for samples to be contaminated. For example, if the iron in lithium iron phosphate is dissolved, it will be affected by interference in the environment, resulting in a larger test result; if the mixed solid or liquid has corrosive properties such as strong acids and alkalis, it is easy to produce sputtering and harm to the human body during the stirring or filtration process; such as the residual cobalt test of lithium cobalt oxide, sulfuric acid is generally added, and the stirring process is prone to sputtering and causing harm; if the process is exposed to air, it may lead to an increased possibility of reaction with gases in the air or air dissolving in the solid-liquid mixture; if the residual alkali pretreatment of the high-nickel ternary positive electrode material is exposed to air, it will affect its hydroxide and carbonate ratio, affecting the stability and accuracy of the chemical test analysis results.

[0003] The invention patent with application number CN202210902417.1 proposes an integrated solid-liquid mixing-separation device and its use method, the device includes a mixing and separation device body powered by an oscillator, the mixing and separation device body includes a detachably assembled top cover and a shell, a separation flow channel is arranged in the shell, the top of the separation flow channel spreads outward in an inverted cone, the bottom of the separation flow channel is equipped with a filter assembly, the inverted cone is fixedly assembled with the shell, a plurality of separation injection holes are evenly opened in the circumferential direction of the side wall of the inverted cone, a baffle is arranged above the inverted cone, the baffle is fixedly assembled with the shell, and a vent is opened on the baffle. However, during the filtering process, the device lifts the mixed liquid at the bottom of the device onto the filter assembly, and the mixed liquid falls back to the bottom of the device after being filtered. During the entire filtering process, the filtered mixed liquid will be mixed with the unfiltered mixed liquid, and the filtered mixed liquid needs to be filtered again, thereby increasing the time required for the entire filtering process. Utility Model Content

[0004] The utility model aims to provide a solid-liquid mixing separation device, which solves the problem of significant influence of human factors and environmental factors in chemical analysis and detection experiments, improves test stability and accuracy, and avoids sample contamination.

[0005] The utility model adopts a technical solution to solve its technical problem, which is to propose a solid-liquid mixing and separation device, including a first shell and a second shell connected at the ends to form a closed space, and a filter unit; a first cavity is provided in the first shell, a second cavity is provided in the second shell, and the filter unit is arranged between the first cavity and the second cavity. The first cavity is used to mix solid and liquid to form a mixed liquid, and the mixed liquid enters the second cavity after passing through the filter unit.

[0006] In the embodiment of the present application, a fixed block is provided on the first shell and the second shell, and the solid-liquid mixing and separation device also includes a stirrer. The fixed block is fixedly connected to the stirrer, and the stirrer is used to drive the first shell and the second shell to rotate.

[0007] In the embodiment of the present application, a connecting edge is provided on the first shell, a connecting groove is provided on the second shell, the filter unit is embedded in the connecting edge, and the connecting edge is fixed in the connecting groove.

[0008] In the embodiment of the present application, threads are provided on the outer surface of the connecting edge and the inner wall of the connecting groove.

[0009] In the embodiment of the present application, the first cavity is a cylindrical cavity, and the cross-sectional area of ​​the first cavity is smaller than the cross-sectional area of ​​the connecting edge.

[0010] In an embodiment of the present application, the second cavity is a cylindrical cavity, the cross-sectional area of ​​the second cavity is smaller than the cross-sectional area of ​​the connecting groove, and the cross-sectional area of ​​the first cavity is equal to the cross-sectional area of ​​the second cavity.

[0011] In an embodiment of the present application, the filtration unit includes a first filter membrane, a first filter sand core, a second filter membrane and a second filter sand core that are abutted against each other. The mixed liquid passes through the first filter membrane, the first filter sand core, the second filter membrane and the second filter sand core in sequence and enters the second cavity.

[0012] In an embodiment of the present application, the filter unit further includes a first fixing ring and a second fixing ring, the first fixing ring abuts against the first filter membrane, and the second fixing ring abuts against the second filter sand core.

[0013] In an embodiment of the present application, the pore size of the filter pores of the first filter membrane is larger than the pore size of the filter pores of the second filter membrane.

[0014] In the embodiment of the present application, the first shell and the second shell are made of polytetrafluoroethylene.

[0015] The beneficial effects of the utility model are:

[0016] 1. The solid-liquid mixing and separation device proposed by the utility model, the first shell and the second shell are connected at the end to form a closed space, and the filtering unit is accommodated in the closed space, the two steps of mixing and filtering are completed in a closed space, the whole process is not interfered by human factors and environmental factors, the contamination of the sample to be tested is avoided, and the stability and accuracy of the test are improved;

[0017] 2. The solid-liquid mixing and separation device proposed by the utility model has threads on the outer surface of the connection and the inner wall of the connection groove, and the first shell and the second shell are connected in a screw connection. During the two steps of stirring and filtering, the environment can be isolated to prevent the sample to be tested from being contaminated;

[0018] 3. The solid-liquid mixing and separation device proposed by the utility model enhances the connection strength between the first shell and the second shell by setting a thread, and no solid-liquid splashing will occur during the two steps of stirring and filtering, thereby improving the safety of the entire mixing and filtering process;

[0019] 4. The utility model proposes a solid-liquid mixing separation device, in which the cross-sectional area of ​​the first cavity and the cross-sectional area of ​​the second cavity are both smaller than the cross-sectional area of ​​the connecting groove, which can ensure that the mixed liquid passes through the filter unit and enters the second cavity, thereby avoiding the mixed liquid flowing from the edge of the connection to the second cavity, improving the accuracy of the filtrate in the second cavity, and improving the stability and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a cross-sectional view of a solid-liquid mixing separation device according to an embodiment of the utility model;

[0022] Figure 2 For the utility model embodiment Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of a first shell of a solid-liquid mixing and separation device according to an embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of a second shell of a solid-liquid mixing and separation device according to an embodiment of the utility model.

[0025] In the figure: 1, first shell; 11, connecting edge; 2, second shell; 21, connecting groove; 3, filter unit; 31, first filter membrane; 32, first filter sand core; 33, second filter membrane; 34, second filter sand core; 35, first fixing ring; 36, second fixing ring. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the embodiments of the utility model and the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the design orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0027] The present invention provides a solid-liquid mixing separation device. Figure 1 , Figure 2 , Figure 3 , Figure 4 , mainly includes a first shell 1, a second shell 2 and a filter unit 3.

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 In the embodiment of the present application, a first cavity is provided inside the first shell 1, a second cavity is provided inside the second shell 2, a filter unit 3 is provided between the first cavity and the second cavity, the ends of the first shell 1 and the second shell 2 are connected to form a closed space, and the filter unit 3 is contained in the closed space. Solids and liquids are added to the first cavity, the first shell 1 and the second shell 2 are connected, and the second shell 2 is located above the first shell 1, the solids and liquids are mixed in the first cavity to form a mixed liquid, and then the first shell 1 and the second shell 2 are reversed, the mixed liquid in the first cavity passes through the filter unit 3, and enters the second cavity, the filtrate after filtering by the filter unit 3 is stored in the second cavity, and the solid insoluble matter is left in the first cavity, thereby realizing the mixing and filtering steps in the detection experiment. The two steps of mixing and filtering are completed in a closed space, and the whole process is not interfered by human factors and environmental factors, which avoids the contamination of the sample to be detected and improves the stability and accuracy of the test.

[0029] Further, in order to shorten the time required for solid-liquid mixing and mixed liquid filtration, an integrated fixed block is provided on the outer surface of the first shell 1 and the second shell 2, and the fixed block can be fixedly connected to the mixer. The fixed blocks of the first shell and the second shell are on the same axis after being assembled into one. The mixer drives the first shell 1 and the second shell 2 to rotate to accelerate the solid-liquid mixing and mixed liquid filtration. Specifically, the mixer can be a planetary mixing mixer that rotates on its own. After the first shell 1 and the second shell 2 are connected, they are fixedly connected to the mixer, and the revolution speed is set to 600-3000r / min and the rotation speed is 400-1500r / min, which can stir and mix the solid and liquid in the first cavity to form a mixed liquid, and then reverse and reconnect with the mixer, set the revolution speed to 1500-8000r / min, and the rotation speed is 0, which can centrifuge and filter the mixed liquid in the first cavity, store the filtrate in the second cavity, and leave the solid insoluble matter in the first cavity.

[0030] Preferably, the first shell 1 and the second shell 2 are made of polytetrafluoroethylene, which has chemical stability, corrosion resistance, sealing, high lubricity and non-stickiness, electrical insulation and anti-aging endurance, and can be used for mixing and filtering solids and liquids of different properties, thereby expanding the scope of application of the mixing and separation device.

[0031] In one embodiment, a connecting edge is provided on the first shell 1, a connecting groove is provided on the second shell 2, the filter unit 3 is embedded in the connecting edge, and the connecting edge is fixed in the connecting groove, thereby connecting the first shell 1 and the second shell 2. Through the structure of the connecting edge and the connecting groove, the filter unit 3, the first cavity and the second cavity can be sealed in a closed space, avoiding interference from environmental factors during the filtering and mixing process.

[0032] Furthermore, threads are provided along the outer surface of the connection and the inner wall of the connection groove, and the first shell 1 and the second shell 2 are connected in a screwed manner. During the stirring and filtering steps, the environment can be isolated to prevent the sample to be tested from being contaminated, and the connection strength between the first shell 1 and the second shell 2 is enhanced. No solid-liquid splashing will occur during the stirring and filtering steps, thereby improving the safety of the entire mixing and filtering process.

[0033] Preferably, the first cavity is a cylindrical cavity, and the cross-sectional area of ​​the first cavity is smaller than the cross-sectional area of ​​the connecting edge, and the second cavity is a cylindrical cavity, and the cross-sectional area of ​​the second cavity is smaller than the cross-sectional area of ​​the connecting groove, and the cross-sectional area of ​​the first cavity is equal to the cross-sectional area of ​​the second cavity. The cross-sectional area of ​​the first cavity is smaller than the cross-sectional area of ​​the second cavity, which can ensure that the mixed liquid passes through the filter unit 3 and enters the second cavity, avoiding the mixed liquid from flowing from the edge of the connecting edge to the second cavity, improving the accuracy of the filtrate in the second cavity, and improving the stability and accuracy of the test. Specifically, the inner diameter of the first cavity and the second cavity is 4 cm, and the inner diameter of the connecting edge and the connecting groove is 5.6 cm.

[0034] In one embodiment, the filter unit 3 includes a first filter membrane 31, a first filter sand core 32, a second filter membrane 33, and a second filter sand core 34 that are in contact with each other. The mixed liquid passes through the first filter membrane 31, the first filter sand core 32, the second filter membrane 33, and the second filter sand core 34 in sequence and enters the second cavity. By using multiple filter layers to filter the mixed liquid, the solid insoluble matter and the filtrate can be completely separated, thereby improving the filtering effect of the mixed liquid.

[0035] Furthermore, the filter unit 3 also includes a first fixing ring 35 and a second fixing ring 36. The first fixing ring 35 abuts against the first filter membrane 31, and the second fixing ring 36 abuts against the second filter sand core 34. The first fixing ring 35, the first filter membrane 31, the first filter sand core 32, the second filter membrane 33, the second filter sand core 34 and the second fixing ring 36 are assembled in order and fixed inside the connecting edge.

[0036] Furthermore, the pore size of the filter pores of the first filter membrane 31 is larger than the pore size of the filter pores of the second filter membrane 33. The filtering accuracy of each filtration is gradually increased, and the mixed liquid is filtered layer by layer, which improves the filtering effect of the mixed liquid. Specifically, the pore size of the first filter membrane 31 is 0.45 microns, and the pore size of the second filter membrane 33 is 0.1 microns.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0038] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation methods, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A solid-liquid mixing and separation device, characterized in that: The invention comprises a first shell (1) and a second shell (2) connected at their ends to form a closed space, and a filter unit (3); a first cavity is provided in the first shell (1), a second cavity is provided in the second shell (2), the filter unit (3) is provided between the first cavity and the second cavity, the first cavity is used to mix solid and liquid to form a mixed liquid, and the mixed liquid passes through the filter unit (3) and enters the second cavity.

2. A solid-liquid mixing separation device according to claim 1, characterized in that: The first shell (1) and the second shell (2) are both provided with a fixed block, and the solid-liquid mixing and separation device further comprises a stirrer, the fixed block is fixedly connected to the stirrer, and the stirrer is used to drive the first shell (1) and the second shell (2) to rotate.

3. A solid-liquid mixing separation device according to claim 1, characterized in that: The first shell (1) is provided with a connecting edge (11), the second shell (2) is provided with a connecting groove (21), the filter unit (3) is embedded in the connecting edge (11), and the connecting edge (11) is fixed in the connecting groove (21).

4. A solid-liquid mixing separation device according to claim 3, characterized in that: The outer surface of the connecting edge (11) and the inner wall of the connecting groove (21) are both provided with threads.

5. The solid-liquid mixing separation device according to claim 3, characterized in that: The first cavity is a cylindrical cavity, and the cross-sectional area of ​​the first cavity is smaller than the cross-sectional area of ​​the connecting edge (11).

6. The solid-liquid mixing separation device according to claim 5, characterized in that: The second cavity is a cylindrical cavity, the cross-sectional area of ​​the second cavity is smaller than the cross-sectional area of ​​the connecting groove (21), and the cross-sectional area of ​​the first cavity is equal to the cross-sectional area of ​​the second cavity.

7. The solid-liquid mixing separation device according to claim 3, characterized in that: The filter unit (3) comprises a first filter membrane (31), a first filter sand core (32), a second filter membrane (33) and a second filter sand core (34) which are in contact with each other, and the mixed liquid passes through the first filter membrane (31), the first filter sand core (32), the second filter membrane (33) and the second filter sand core (34) in sequence and then enters the second cavity.

8. The solid-liquid mixing separation device according to claim 7, characterized in that: The filter unit (3) further comprises a first fixing ring (35) and a second fixing ring (36); the first fixing ring (35) abuts against the first filter membrane (31), and the second fixing ring (36) abuts against the second filter sand core (34).

9. The solid-liquid mixing separation device according to claim 7, characterized in that: The pore size of the filter pores of the first filter membrane (31) is larger than the pore size of the filter pores of the second filter membrane (33).

10. The solid-liquid mixing separation device according to claim 1, characterized in that: The first shell (1) and the second shell (2) are made of polytetrafluoroethylene.

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