A phosphorus enrichment system and process

Abstract

The present application relates to the technical field of phosphorus enrichment, and particularly relates to a phosphorus enrichment system and process, the phosphorus enrichment system comprising a bin body, a material collecting sleeve is vertically inserted into the bin body, a central shaft is vertically and rotatably inserted into the material collecting sleeve, and an impeller is synchronously rotatably sleeved on the central shaft; a material collecting channel is formed between the central shaft and the material collecting sleeve; the impeller has an odd number of blades, the middlemost blade is fixedly connected with the central shaft, first elastic members are connected between adjacent blades, and the blades have a ring-shaped wave structure; an upper blocking sleeve is arranged on the material collecting sleeve, an upper protrusion is arranged on the upper blocking sleeve, a lower blocking sleeve is arranged on the bin body, a lower protrusion is arranged on the lower blocking sleeve, the upper blocking sleeve and the lower blocking sleeve can slide in the vertical direction to change the axial height of the impeller and improve adaptability, and the upper blocking sleeve, the upper protrusion, the lower blocking sleeve and the lower protrusion can form blocking cooperation with the two outermost blades to form radial pulse flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phosphorus enrichment, in particular to a phosphorus enrichment system and process. BACKGROUND

[0002] Iron phosphate and lithium iron phosphate are currently the most widely used battery materials, and their performance is closely related to the quality of raw materials in the preparation process. The phosphorus element plays a key role in building a stable framework and ensuring ion transmission efficiency in the crystal structure and electrochemical properties of these two materials, and is a key component that determines the energy density and cycle life of the battery. Therefore, obtaining high-purity and high-activity phosphorus-containing raw materials in the preparation process of iron phosphate and lithium iron phosphate becomes a basic link in the entire production chain, directly affecting the quality and performance of subsequent battery products.

[0003] In the process of extracting effective phosphorus components from phosphorus-containing raw materials, the treatment of phosphorus-containing slurry is one of the core steps, and the flotation machine is the key equipment to achieve this step. It separates the phosphorus-containing substances in the phosphorus-containing slurry through physical and chemical effects, thereby enriching phosphorus elements and providing qualified phosphorus-containing intermediates for subsequent preparation processes. In related technologies, such as Chinese patent CN223288244U, a SF-type flotation machine for phosphate ore dressing is disclosed. The SF-type flotation machine for phosphate ore dressing solves the problems of small air suction and high energy consumption by improving the structure of the SF-type flotation machine, including the design of the air distributor and the rear inclined blade.

[0004] However, the existing flotation machine has the following problems when extracting phosphorus-containing substances from phosphorus-containing slurry. On the one hand, the axial height of its impeller is fixed, which results in a fixed shear mixing range and slurry circulation flow range. When it is necessary to change the shear mixing range and slurry circulation flow range, it is necessary to replace the impeller with a different axial size, which is inconvenient to operate and has poor adaptability. On the other hand, after the impeller rotates smoothly, the flow field formed by the slurry driven by the impeller is relatively fixed, which not only easily causes flow dead angles, but also limits the collision efficiency and probability of gas bubbles and phosphorus-containing particles, affecting the enrichment of phosphorus. SUMMARY

[0005] Therefore, it is necessary to provide a phosphorus enrichment system and process to solve the problems of poor adaptability and low phosphorus enrichment efficiency of the existing flotation machine.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] A phosphorus enrichment system and process, the phosphorus enrichment system comprising:

[0008] a bin body configured to receive phosphorus-containing slurry;

[0009] a foam scraping assembly configured to scrape off the foam formed in the bin body;

[0010] a collecting sleeve vertically inserted into the bin body;

[0011] a central shaft vertically inserted into the collecting sleeve and capable of rotating around its axis;

[0012] a vane wheel sleeved on the central shaft and capable of rotating synchronously with the central shaft; a collecting channel is formed between the central shaft and the collecting sleeve, and the collecting channel is in communication with the bin body and the vane wheel, and is configured to receive air from the outside and the phosphorus-containing slurry from the bin body and guide the two to the vane wheel; the vane wheel has an odd number of blades arranged in the vertical direction, the middle blade is fixedly connected with the central shaft, and a first elastic member is connected between adjacent blades, and under the action of the first elastic member, the blades other than the middle blade can elastically slide in the vertical direction, and the blades are in the form of a ring-shaped wave structure;

[0013] an upper blocking sleeve arranged at the bottom of the collecting sleeve and sleeved on the outer periphery of the central shaft, the bottom of the upper blocking sleeve is provided with at least one upper protrusion, and the bottom of the upper blocking sleeve and the upper protrusion can form a blocking fit with the uppermost blade; the upper blocking sleeve can slide in the vertical direction, and the position after sliding can be locked;

[0014] a lower blocking sleeve arranged at the bottom of the bin body and sleeved on the outer periphery of the central shaft, the inner bottom of the lower blocking sleeve is provided with at least one lower protrusion, and the lower protrusion is arranged correspondingly with the upper protrusion; the inner bottom of the lower blocking sleeve and the lower protrusion can form a blocking fit with the lowermost blade; the lower blocking sleeve can slide in the vertical direction, and the position after sliding can be locked.

[0015] Further, the bottom of the bin body is provided with a plurality of first guide plates, and the plurality of first guide plates are arranged in the circumferential direction of the central shaft; the first guide plates are vertically arranged and extend in the radial direction of the central shaft.

[0016] Further, the bottom of the bin body is provided with a plurality of second guide plates, the second guide plates are vertically arranged, the plurality of second guide plates are arranged in the circumferential direction of the central shaft and alternately arranged with the first guide plates, the plurality of second guide plates can rotate synchronously around the axis of the central shaft and have corresponding first and second positions before and after rotation; when in the first position, the second guide plates are arranged closely with the first guide plates; when in the second position, the second guide plates are arranged spaced apart from the first guide plates and extend in the radial direction of the central shaft; when the distance between adjacent blades decreases, the second guide plates switch from the first position to the second position.

[0017] Further, the upper baffle sleeve is sleeved with an upper end cover in a relative sliding manner, the lower baffle sleeve is sleeved with a lower end cover in a relative sliding manner, the lower end cover and the upper end cover are arranged in a spaced manner, and a plurality of supporting rods are vertically connected between the lower end cover and the upper end cover, the plurality of supporting rods are arranged in a spaced manner along the circumferential direction of the central shaft, and a plurality of third guide plates are sleeved on each supporting rod, the plurality of third guide plates on the same supporting rod are arranged in a spaced manner along the extension direction of the supporting rod, and the third guide plates are configured to guide in the radial direction of the central shaft.

[0018] Further, the plurality of third guide plates on the same supporting rod are arranged in a staggered manner from bottom to top.

[0019] Further, the third guide plates can rotate around the supporting rods, all the supporting rods can slide in a synchronous manner in the vertical direction, the third guide plate located at the lowermost position on each supporting rod is in a screwing fit with the supporting rod, and the other third guide plates are connected with the lower third guide plate through the second elastic members, and under the action of the second elastic members, when the lower third guide plate rotates, the upper guide plate can rotate following.

[0020] Further, the phosphorus enrichment system further comprises a driving cylinder, an output shaft of the driving cylinder is arranged upwards, and a mounting disc is fixedly arranged at the end portion of the output shaft; all the second guide plates are arranged on the first supporting ring, the first supporting ring is sleeved on the mounting disc and can rotate around the axis thereof, a spiral groove is arranged on the inner circumferential wall of the first supporting ring, and a spiral protrusion is arranged on the circumferential side wall of the mounting disc, the spiral protrusion is slidingly inserted into the spiral groove, and the first supporting ring and the mounting disc are in a screwing fit.

[0021] Further, the second elastic member is a coil spring.

[0022] Further, the first elastic member is an elastic washer, the elastic washer is sleeved on the central shaft and abuts between the adjacent two blades.

[0023] The application further provides a phosphorus enrichment process, which adopts the phosphorus enrichment system, and the phosphorus enrichment process comprises the following steps:

[0024] S1, adjusting the positions of the upper baffle sleeve and the lower baffle sleeve according to the required shear mixing range and slurry circulating flow range, and the greater the required shear mixing range and slurry circulating flow range, the greater the spacing between the upper baffle sleeve and the lower baffle sleeve;

[0025] S2, putting the phosphorus-containing slurry into the bin body;

[0026] S3, drive the central shaft to rotate, the central shaft synchronously drives the impeller to rotate, makes the material collection channel form negative pressure, under the action of pressure difference, the outside air and the phosphorus-containing slurry in the bin body enter the material collection channel, then flow to the impeller, the spacing between the adjacent blades is periodically increased and reduced under the stop of the upper baffle sleeve, the upper protrusion, the lower baffle cylinder and the lower protrusion, the air and the phosphorus-containing slurry between the adjacent blades form radial pulse flow, then the air forms bubbles, the bubbles float on the surface of the phosphorus-containing slurry and enrich the phosphorus-containing substances, finally rise to the surface of the phosphorus-containing slurry and form a foam layer;

[0027] S4, the foam is scraped out from the bin body through the foam scraping assembly.

[0028] The beneficial effects of the present application are:

[0029] The present application relates to a kind of enrichment systems and process of phosphorus, by setting impeller with odd number of blades, and adjacent blades are connected by first elastic member, and set with the upper baffle sleeve and lower baffle cylinder matched therewith, utilize the characteristics that upper baffle sleeve and lower baffle cylinder can slide along vertical direction and can form stop cooperation with outermost blade, can adjust the position of upper baffle sleeve and lower baffle cylinder according to the required shear mixing range and slurry circulation flow range, then adjust the axial height of impeller, to improve adaptability;Again by setting upper protrusion on upper baffle sleeve and lower protrusion on lower baffle cylinder, and utilize the characteristics that upper protrusion and lower protrusion can form stop cooperation with outermost blade, during the rotation of impeller, the spacing between adjacent blades is periodically increased and reduced, then the air and phosphorus-containing slurry between adjacent blades form radial pulse flow, to break stable flow field, so that air and phosphorus-containing slurry produce different speed flow, increase the flow rate difference of each phase, not only beneficial to the uniformity of three-phase mixing, also more conducive to improve the collision probability of bubble and phosphorus-containing particles, improve the ability of flotation.

[0030] Further, by setting second guide plate, and utilize the characteristics that second guide plate can rotate around the axis of central shaft, when the spacing between adjacent blades is reduced, second guide plate switches from first position to second position, so that the mixing material is divided into more independent parts along the circumference, while further increasing shear strength, further ensure the stability of subsequent bubble rising.

[0031] Further, by setting multiple third guide plates on the same support rod from bottom to top staggered, and utilize its guide characteristics, improve the effect of turbulence. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The three-dimensional structure schematic diagram of the enrichment system of phosphorus provided for the embodiment of the present application;

[0033] Figure 2Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0034] Figure 3 Front view structure schematic diagram of the partial structure assembly of the phosphorus enrichment system provided by the embodiment of the present application

[0035] Figure 4 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application; Figure 3

[0036] Figure 5 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application; Figure 4

[0037] Figure 6 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application; Figure 3

[0038] Figure 7 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0039] Figure 8 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0040] Figure 9 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0041] Figure 10 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0042] Figure 11 Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0043] Part exploded view of the phosphorus enrichment system provided by the embodiment of the present application;

[0044] ​​​1, bin body; 101, first support rod; 102, first mounting plate; 2, foam scraping assembly; 201, center rod; 202, support plate; 203, scraper; 204, first drive motor; 205, speed reducer; 206, first pulley; 207, second pulley; 208, first transmission belt; 3, material collecting sleeve; 301, air inlet pipe; 302, feed inlet; 303, rib plate; 304, second mounting plate; 4, center shaft; 5, impeller; 501, blade; 5011, first through hole; 5012, base pipe; 5013, guide rod; 502, elastic retainer; 6, upper blocking sleeve; 601, second jack; 602, upper protrusion; 7, lower blocking sleeve; 701, third jack; 702, lower protrusion; 8, first flow guide plate; 9, second flow guide plate; 901, first support ring; 9011, helical groove; 10, upper end cover; 11, lower end cover; 1101, fixed pipe; 1102, second support rod; 1103, second support ring; 1104, second through hole; 12, support rod; 1201, third support ring; 12011, guide column; 13, third flow guide plate; 1301, insertion pipe; 14, coil spring; 15, drive cylinder; 1501, mounting disc; 15011, helical protrusion; 15012, guide sleeve; 16, drive assembly; 1601, second drive motor; 1602, third pulley; 1603, second transmission belt; 1604, fourth pulley; 17, fixed sleeve; 1701, fourth jack. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to examples and in conjunction with the drawings.

[0046] The phosphorus enrichment system provided by the embodiments of the present application will be described below with reference to Figures 1 to 11 which is particularly suitable for enriching phosphorus, and of course, is also equally suitable for enriching other elements.

[0047] Specifically, the phosphorus enrichment system is provided with a bin body 1, the top of which is open to facilitate the reception of phosphorus-containing slurry; a foam scraping assembly 2 is arranged at the top of the bin body 1, which is used to scrape off the foam formed in the bin body 1; a material collecting sleeve 3 is vertically inserted into the bin body 1, when the length of the material collecting sleeve 3 is relatively long, it can be divided into multiple sub-sleeves along the axial direction, which is convenient for transportation and processing, and adjacent sub-sleeves can be fixedly connected through flanges and fasteners such as bolts and nuts; a center shaft 4 is vertically inserted into the material collecting sleeve 3, the center shaft 4 is rotatably connected with the material collecting sleeve 3 through bearings, so that the center shaft 4 can rotate around its own axis; an impeller 5 is fixedly sleeved on the center shaft 4, the impeller 5 is located below the material collecting sleeve 3 and is submerged in the phosphorus-containing slurry during use, and the impeller 5 can drive the phosphorus-containing slurry to move when rotating; the center shaft 4 and the material collecting sleeve 3 are arranged at intervals and form a material collecting channel therebetween.

[0048] When the impeller 5 rotates, the inside of the material collecting channel is under negative pressure; taking the example that the material collecting sleeve 3 is divided into two sub-tubes along the axial direction, an air inlet pipe 301 is fixedly arranged on the outer peripheral wall of the lower sub-tube and is in communication, the air inlet pipe 301 is in a L-shaped structure, and is arranged upward away from one end of the lower sub-tube, and is located above the phosphorus-containing slurry liquid surface during use, so as to facilitate the introduction of air into the material collecting channel, the air in the material collecting channel moves downward to the impeller 5, then forms bubbles, and is diffused along the periphery under the driving of the impeller 5, the bubbles float upward and enrich the phosphorus-containing substances, and finally rise to the phosphorus-containing slurry liquid surface and form a foam layer; a feeding port 302 is arranged on the outer peripheral wall of the lower sub-tube, the feeding port 302 is in communication with the material collecting channel and is immersed in the phosphorus-containing slurry, so as to facilitate the introduction of the phosphorus-containing slurry into the material collecting channel, the phosphorus-containing slurry in the material collecting channel then moves downward to the impeller 5, and is diffused along the periphery under the driving of the impeller 5, then the phosphorus-containing substances in the phosphorus-containing slurry contact the bubbles and are adsorbed thereon, so as to realize the enrichment of phosphorus.

[0049] It can be understood that the number of the feeding ports 302 can be set to be multiple, and the feeding ports 302 are arranged in the circumferential direction, so as to improve the efficiency of the introduction of the phosphorus-containing slurry into the material collecting channel.

[0050] The foam scraping assembly 2 comprises a center rod 201, the center rod 201 extends horizontally along the front-rear direction and is arranged on the left side, both ends of the center rod 201 are rotationally connected with the bin body 1 through bearings, so that the center rod 201 can rotate around its own axis; two support plates 202 are fixedly arranged on the center rod 201, the two support plates 202 are arranged in the axial direction of the center rod 201, the support plates 202 are arranged perpendicularly to the center rod 201 and symmetrically about the center rod 201; a scraper 203 is fixed on both ends of the two support plates 202 on the same side of the center rod 201 through fasteners such as bolts and nuts, the scraper 203 is in a strip-shaped structure and is arranged in parallel to the center rod 201, and the plate surface of the scraper 203 is perpendicular to the plate surface of the support plate 202. When the center rod 201 rotates, the support plates 202 drive the scraper 203 to rotate synchronously, so as to facilitate the scraping of the foam formed in the bin body 1.

[0051] In order to provide the driving force for the rotation of the center rod 201, the foam scraping assembly 2 further comprises a first driving motor 204; in order to facilitate the installation of the first driving motor 204, two first supporting rods 101 are fixedly arranged on the top of the bin body 1, the first supporting rods 101 extend horizontally along the front-rear direction and are arranged at intervals along the left-right direction, the first supporting rods 101 are arranged to the right of the center rod 201, a first mounting plate 102 is fixedly arranged on the top of the front side of the two first supporting rods 101, the plate surface of the first mounting plate 102 is arranged horizontally, the first driving motor 204 is fixed on the top of the first mounting plate 102 by fasteners such as bolts and nuts during installation, and the motor shaft of the first driving motor 204 is arranged horizontally to the left; a speed reducer 205 is also fixed on the top of the first mounting plate 102 by fasteners such as bolts and nuts, the speed reducer 205 is located to the left of the first driving motor 204, the motor shaft of the first driving motor 204 is connected with the input end of the speed reducer 205, and the output end of the speed reducer 205 is fixedly sleeved with a first pulley 206; a second pulley 207 is fixedly sleeved on the front end of the center rod 201, the axis of the second pulley 207 is parallel to the axis of the first pulley 206; a first transmission belt 208 is commonly transmissionally sleeved on the first pulley 206 and the second pulley 207. When the center rod 201 is driven to rotate, the first driving motor 204 is started, the first driving motor 204 transmits power to the first pulley 206 through the speed reducer 205, the first pulley 206 rotates, and the center rod 201 is driven to rotate synchronously through the first transmission belt 208 and the second pulley 207.

[0052] In order to facilitate the installation of the aggregate sleeve 3, a plurality of rib plates 303 are fixedly arranged on the outer peripheral wall of the upper split cylinder, the plurality of rib plates 303 are arranged in the circumferential direction, a second mounting plate 304 is fixedly arranged on the bottom of all the rib plates 303, the plate surface of the second mounting plate 304 is arranged horizontally, and the second mounting plate 304 is fixed on the top of the two first supporting rods 101 by fasteners such as bolts and nuts at the same time, and the second mounting plate 304 is located to the rear side of the first mounting plate 102.

[0053] In order to provide driving force for the rotation of the central shaft 4, the phosphorus enrichment system is further provided with a driving assembly 16, which comprises a second driving motor 1601 installed on the top of the bin body 1 and located at the right side of the material collecting sleeve 3, and the motor shaft of the second driving motor 1601 is arranged upward; the top end of the central shaft 4 extends upward to the outside of the material collecting sleeve 3; a third pulley 1602 is fixedly sleeved on the motor shaft of the second driving motor 1601; a fourth pulley 1604 is fixedly sleeved on the top end of the central shaft 4; and a second transmission belt 1603 is synchronously sleeved on the third pulley 1602 and the fourth pulley 1604. When the central shaft 4 is driven to rotate, the second driving motor 1601 is started, the second driving motor 1601 drives the third pulley 1602 to rotate, and the third pulley 1602 drives the central shaft 4 to rotate through the second transmission belt 1603 and the fourth pulley 1604.

[0054] In use, first, the phosphorus-containing slurry is poured into the bin body 1; then the second driving motor 1601 is started, the second driving motor 1601 drives the third pulley 1602 to rotate, the third pulley 1602 drives the central shaft 4 to rotate through the second transmission belt 1603 and the fourth pulley 1604, and the central shaft 4 drives the impeller 5 to rotate. When the impeller 5 rotates, the inside of the material collecting channel is drawn into negative pressure, under the action of the pressure difference, both the external air is moved to the impeller 5 through the air inlet pipe 301 and the material collecting channel in turn to form bubbles, and the phosphorus-containing slurry is moved to the impeller 5 through the feeding port 302 and the material collecting channel in turn. Then, under the stirring action of the impeller 5, the phosphorus particles and the bubbles contact and are adsorbed thereon, and then float to the surface of the phosphorus-containing slurry and form a foam layer; at the same time, the first driving motor 204 is started, the first driving motor 204 transmits power to the first pulley 206 through the speed reducer 205, the first pulley 206 rotates, and the first pulley 206 synchronously drives the central rod 201 to rotate through the first transmission belt 208 and the second pulley 207, and the central rod 201 drives the scraper 203 to rotate, so as to scrape the foam out of the bin body 1.

[0055] Although the above process can realize the enrichment of phosphorus, since the axial height of the impeller 5 is fixed, the relative action space between the impeller 5 and the bottom of the bin body 1 and the surface of the slurry is also fixed: when the axial height is fixed, the range of the slurry that can be contacted and sheared by the impeller 5 is also fixed, and it is impossible to adjust the shearing strength and coverage range according to the concentration, viscosity and other characteristics of the slurry; at the same time, the fixed axial height also makes the circulation path and circulation speed of the phosphorus-containing slurry in the bin body 1 relatively fixed, and it is difficult to adjust the circulation flow range according to the size and density of the phosphorus slurry particles, so as to optimize the contact probability of the phosphorus slurry particles and the bubbles.

[0056] When it is necessary to change the shear mixing range (such as expanding the shear range to ensure uniform mixing when processing high-viscosity phosphorus-containing slurry, or reducing the shear range to avoid energy waste when processing low-concentration phosphorus-containing slurry), or to adjust the circulating flow range of the phosphorus-containing slurry (such as slowing down the circulating speed to prolong the attachment time for fine particle phosphorus slurry, or speeding up the circulating speed to improve the suspension effect for coarse particle phosphorus slurry), since the axial height of the impeller 5 cannot be adjusted, the operator can only change the impeller 5 with different axial dimensions to meet the requirements. This operation method not only needs to suspend the equipment operation, disassemble the old impeller 5 and install the new impeller 5, interrupt the normal production process, and affect the production efficiency; moreover, during the replacement process, the equipment needs to be re-adjusted to ensure the cooperation accuracy of the new impeller 5 with other components, the operation process is complicated, which increases the labor cost and time cost, and at the same time, the frequent disassembly and installation may cause wear of the equipment components, affecting the long-term stable operation of the equipment.

[0057] At the same time, when the impeller 5 rotates to a steady state, the flow field formed by the phosphorus-containing slurry will maintain a relatively fixed form and movement law, which not only easily causes flow dead angles, which usually occur in areas where the flow field force is weak or the fluid motion is blocked, such as the corner position of the bottom of the bin body 1, the edge area of the action range of the impeller 5, or the local area opposite to the rotation direction of the impeller 5. Due to the relatively fixed flow field, these areas are always in the weak area of the phosphorus-containing slurry flow, and the phosphorus-containing slurry is difficult to form effective circulation and update in this area, resulting in long-term retention of part of the phosphorus-containing slurry. These retained phosphorus-containing slurry cannot be fully contacted with fresh bubbles, and the phosphorus-containing substances therein are difficult to be captured by the bubbles and carried to the liquid surface, not only causing waste of phosphorus-containing raw materials, but also possibly causing particle sedimentation due to long-term static state, adhering to the inner wall or bottom of the bin body 1, increasing the difficulty of equipment cleaning, and even affecting the purity of the raw materials in subsequent production. Moreover, it will significantly restrict the collision efficiency and probability of bubbles and phosphorus-containing substances, and further affect the enrichment effect of phosphorus.

[0058] Based on this, in the phosphorus enrichment system provided by the embodiment of the application, the impeller 5 is provided with an odd number of blades 501, the odd number of blades 501 are arranged at intervals in the vertical direction, the middle blade 501 is fixedly connected with the central shaft 4, and the first elastic members are arranged between the adjacent blades 501, the first elastic members can be elastic retaining rings 502, the elastic retaining rings 502 are sleeved on the central shaft 4 during installation and abut between the adjacent blades 501, the blade 501 and the central shaft 4 are formed in a spline fit, so that the blade 501 can rotate synchronously with the central shaft 4 and can elastically slide along the vertical direction relative to the central shaft 4 under the action of the elastic retaining ring 502; the blade 501 is in a ring-shaped wave structure, and the relatively high point positions of different layers of blades 501 are correspondingly arranged, so as to ensure the uniformity of stirring; a plurality of first through holes 5011 are arranged at the top of each blade 501 and are uniformly arranged in the circumferential direction, so as to facilitate the passing of the phosphorus-containing slurry. When the blade 501 rotates, the relatively high point position of the blade 501 can push the phosphorus-containing slurry outward, so as to stir the phosphorus-containing slurry and form a negative pressure in the material collecting channel.

[0059] The upper retaining sleeve 6 is inserted at the bottom of the material collecting sleeve 3, the upper retaining sleeve 6 is sleeved on the outer periphery of the central shaft 4 and is arranged at intervals with the material collecting sleeve 3 and the central shaft 4; the bottom of the material collecting sleeve 3 is sleeved with a fixed sleeve 17, a plurality of groups of first insertion holes are arranged on the circumferential side wall of the fixed sleeve 17 and are arranged in the circumferential direction, each group includes a plurality of first insertion holes, and the plurality of first insertion holes in the same group are arranged at intervals in the axial direction, a plurality of groups of second insertion holes 601 are arranged on the circumferential side wall of the upper retaining sleeve 6 and are arranged in the circumferential direction, each group includes a plurality of second insertion holes 601, and the plurality of second insertion holes 601 in the same group are arranged at intervals in the axial direction; when the upper retaining sleeve 6 and the fixed sleeve 17 are installed, the same bolt passes through the first insertion hole, the material collecting sleeve 3 and the second insertion hole 601 in sequence, and the bolt and the material collecting sleeve 3 are formed in a threaded fit, so as to fix the positions of the upper retaining sleeve 6 and the fixed sleeve 17; and when the bolt cooperates with different first insertion holes and second insertion holes 601, the upper retaining sleeve 6 can slide in the vertical direction, and the position after sliding can be locked.

[0060] A lower blocking cylinder 7 is arranged at the inner bottom of the bin body 1, the lower blocking cylinder 7 is sleeved on the outer periphery of the central shaft 4 and is arranged in a spaced manner with the central shaft 4, the top of the lower blocking cylinder 7 is open, a plurality of groups of third insertion holes 701 are arranged on the circumferential sidewall of the lower blocking cylinder 7, the plurality of groups of third insertion holes 701 are arranged in a circumferential direction, each group includes a plurality of third insertion holes 701, and the plurality of third insertion holes 701 in the same group are arranged in an axial direction in a spaced manner; when the lower blocking cylinder 7 is installed, bolts pass through the bin body 1 and the third insertion holes 701 in sequence, and the bolts and the third insertion holes 701 are in threaded cooperation to fix the position of the lower blocking cylinder 7; and when the bolts cooperate with different third insertion holes 701, the lower blocking cylinder 7 can slide in a vertical direction, and the position after sliding can be locked.

[0061] At least one upper protrusion 602 is arranged at the bottom of the upper blocking sleeve 6, for example, two upper protrusions 602 are arranged in a circumferential direction and are arranged in a spaced manner; at least one lower protrusion 702 is arranged at the inner bottom of the lower blocking cylinder 7, for example, two lower protrusions 702 are arranged in a circumferential direction and are arranged in a spaced manner and are arranged in a corresponding manner with the upper protrusions 602; the top of the uppermost blade 501 and the bottom of the lowermost blade 501 are coaxially and fixedly provided with base pipes 5012, the base pipes 5012 are sleeved on the central shaft 4 and are in spline cooperation with the central shaft 4, two guide rods 5013 are arranged on the outer peripheral wall of the base pipe 5012, the guide rods 5013 are arranged perpendicularly to the base pipe 5012, and the two guide rods 5013 are arranged in a circumferential direction and are arranged in a spaced manner.

[0062] The bottom of the upper blocking sleeve 6 and the upper protrusion 602 can form a stop cooperation with the uppermost blade 501 through the guide rod 5013, and when the bottom of the upper blocking sleeve 6 and the guide rod 5013 form a stop cooperation, the spacing between the adjacent blades 501 on the upper half side is the largest with the middle blade 501 as a boundary, and when the upper protrusion 602 and the guide rod 5013 form a stop cooperation, the spacing between the adjacent blades 501 on the upper half side is the smallest. The inner bottom of the lower blocking cylinder 7 and the lower protrusion 702 can form a stop cooperation with the lowermost blade 501 through the guide rod 5013, and when the inner bottom of the lower blocking cylinder 7 and the guide rod 5013 form a stop cooperation, the spacing between the adjacent blades 501 on the lower half side is the largest with the middle blade 501 as a boundary, and when the lower protrusion 702 and the guide rod 5013 form a stop cooperation, the spacing between the adjacent blades 501 on the lower half side is the smallest.

[0063] Initially, the vertical positions of the upper baffle sleeve 6 and the lower baffle sleeve 7 are adjusted according to the required shear mixing range and slurry circulation range, thereby adjusting the axial height of the impeller 5 to improve adaptability. Furthermore, when the required shear mixing range and slurry circulation range are larger, the upper baffle sleeve 6 is adjusted to be higher, the lower baffle sleeve 7 to be lower, or vice versa, thus increasing the axial height of the impeller 5 to suit situations with larger required shear mixing and slurry circulation ranges. Similarly, when the required shear mixing range and slurry circulation range are smaller, the upper baffle sleeve 6 is adjusted to be lower, the lower baffle sleeve 7 to be higher, or vice versa, thus decreasing the axial height of the impeller 5 to suit situations with smaller required shear mixing and slurry circulation ranges.

[0064] During the rotation of the central shaft 4, all blades 501 rotate synchronously with the central shaft 4 through spline connection, and the relatively high point of the blades 501 simultaneously pushes the phosphorus-containing slurry outward, thereby both stirring the phosphorus-containing slurry and creating negative pressure in the collection channel. When the bottom of the upper sleeve 6 and the guide rod 5013 form a stop fit, the distance between adjacent blades 501 on the upper half is the largest, with the middle blade 501 as the dividing line. At this time, the bottom of the lower sleeve 7 and the guide rod 5013 form a stop fit, and the distance between adjacent blades 501 on the lower half is the largest. When the upper protrusion 602 and the guide rod 5013 form a stop fit, the distance between adjacent blades 501 on the upper half is the smallest. At this time, the lower protrusion 702 and the guide rod 5013 form a stop fit, and the distance between adjacent blades 501 on the lower half is the smallest. This causes the distance between adjacent blades 501 to increase and decrease periodically, thereby causing the air and phosphorus-containing slurry between adjacent blades 501 to form a radial pulse flow. This can break the stable flow field, causing the air and phosphorus-containing slurry to flow at different speeds, increasing the velocity difference between the phases. This is not only beneficial to the uniformity of the three-phase mixing, but also to improving the collision probability of bubbles and phosphorus-containing particles, thus improving the flotation capacity. Furthermore, during the repeated changes in the blade spacing (501), when the blade spacing (501) increases, the pressure in that region changes instantaneously (e.g., forming a local low-pressure area). This frequent pressure fluctuation is highly conducive to the formation of microbubbles (cavitation effect).

[0065] In a further embodiment, to improve the flotation effect, multiple first guide plates 8 can be fixedly installed at the bottom of the chamber 1. The multiple first guide plates 8 are arranged at equal intervals along the circumference of the central axis 4 and are located on the outer periphery of the impeller 5. The first guide plates 8 are vertically arranged and extend radially along the central axis 4. In this way, when the mixture is thrown out by the impeller 5, the first guide plates 8 divide the mixture into multiple independent parts along the circumference, which increases the shear strength and ensures the stability of the subsequent bubble rise.

[0066] In a further embodiment, to further improve the flotation effect, multiple second guide plates 9 are provided at the bottom of the tank 1. The second guide plates 9 are vertically arranged and are equally spaced along the circumference of the central axis 4, alternating with the first guide plates 8. A first support ring 901 is fixedly provided at the bottom of the multiple second guide plates 9. The first support ring 901 is coaxial with the central axis 4. The first support ring 901 can rotate around the axis of the central axis 4 to drive the multiple second guide plates 9 to rotate synchronously around the axis of the central axis 4. The second guide plates 9 have corresponding first... In the first position, the second guide plate 9 and the first guide plate 8 are closely attached. In the second position, the second guide plate 9 and the first guide plate 8 are spaced apart and extend radially along the central axis 4. When the distance between adjacent blades 501 decreases, the mixture between adjacent blades 501 moves outward. At this time, the second guide plate 9 switches from the first position to the second position, so that the mixture can be divided into more independent parts in the circumferential direction by the first guide plate 8 and the second guide plate 9. This further increases the shear strength and further ensures the stability of the subsequent bubble rise.

[0067] In a further embodiment, to improve the flotation effect, an upper end cover 10 may be fitted around the outer periphery of the upper sleeve 6, and the upper end cover 10 may also be fitted onto the fixed sleeve 17. A lower end cap 11 is fitted onto the lower baffle 7. The lower end cap 11 is annular and fixed to the bottom of the chamber 1, and is coaxial with the central shaft 4. A fixing tube 1101 is coaxially and fixedly installed on the top of the lower end cap 11. Multiple sets of fourth insertion holes 1701 are opened on the circumferential side wall of the fixing tube 1101. The multiple sets of fourth insertion holes 1701 are arranged circumferentially, and each set includes multiple fourth insertion holes 1701. The multiple fourth insertion holes 1701 in the same set are arranged axially at intervals. When the lower baffle 7 is installed, the same bolt passes through the fourth insertion hole 1701 and the third insertion hole 701 in sequence, and the bolt and the fourth insertion hole 1701 and / or the third insertion hole 701 form a threaded engagement to fix the position of the lower baffle 7. When the bolt engages with different third insertion holes 701 and fourth insertion holes 1701, the lower baffle 7 can slide in the vertical direction, and the position after sliding can be locked. Multiple second support rods 1102 are vertically and fixedly installed at the top of the lower baffle 7, and the multiple second support rods 1102 are evenly arranged along the axis of the lower baffle 7; a second support ring 1103 is provided at the top of the multiple second support rods 1102, the second support ring 1103 is coaxially arranged with the lower baffle 7, and is fixedly connected to the upper end cover 10 by fasteners such as bolts and nuts during installation, so as to facilitate the fixation of the upper end cover 10.

[0068] The lower end cover 11 and the upper end cover 10 are spaced apart, and a plurality of support rods 12 are vertically connected between the lower end cover 11 and the upper end cover 10. The plurality of support rods 12 are arranged at equal intervals along the circumference of the central axis 4. A plurality of third guide plates 13 are sleeved on each support rod 12. The plurality of third guide plates 13 on the same support rod 12 are arranged at intervals along the extension direction of the support rod 12. The third guide plates 13 are configured to guide the flow in the radial direction along the central axis 4. In this way, by utilizing the guiding characteristics of the third guide plates 13, both shear strength and radial movement of the mixture can be effectively increased, the collision probability of bubbles and phosphorus-containing particles can be increased, thereby improving the flotation capacity.

[0069] It should be noted that, in order to improve the efficiency of introducing phosphorus-containing slurry into the impeller 5, the lower end cover 11 and the bottom of the bin 1 are spaced apart to form a cavity between them. The cavity is connected to the space between the impeller 5 and the bin 1. Multiple second through holes 1104 are opened on the top of the lower end cover 11. The multiple second through holes 1104 are evenly arranged in the circumferential direction and are connected to the cavity, so that the phosphorus-containing slurry between the impeller 5 and the bin 1 can be introduced into the impeller 5 through the cavity and the second through holes 1104 in sequence.

[0070] In a further embodiment, to enhance the turbulence effect, multiple third guide plates 13 are arranged alternately from bottom to top on the same support rod 12. Thus, by utilizing the characteristic that different third guide plates 13 on the same support rod 12 have different guiding directions, the turbulence effect is improved, increasing the probability of collision between bubbles and phosphorus-containing particles.

[0071] In a further embodiment, to further improve the turbulence effect, the third guide plate 13 is configured to rotate around the support rod 12; a third support ring 1201 is fixedly provided at the bottom of all the support rods 12, the third support ring 1201 and the lower end cover 11 are coaxially arranged and located below the lower end cover 11, the third support ring 1201 can slide in the vertical direction to synchronously drive all the support rods 12 to slide in the vertical direction; an insertion tube 1301 is fixedly provided at the top center of each third guide plate 13, the insertion tube 1301 is sleeved on the support rod 12 during installation. During installation, the insertion tube 1301 on the lower third guide plate 13 is inserted into the bottom of the upper third guide plate 13. The lowermost third guide plate 13 on each support rod 12 forms a helical engagement with the support rod 12. Other third guide plates 13 are connected to the lower third guide plate 13 via a second elastic element. This second elastic element can be a coil spring 14, which is sleeved on the insertion tube 1301, with its inner end fixedly connected to the insertion tube 1301 and its outer end fixedly connected to the upper third guide plate 13 among the adjacent third guide plates 13. When the support rod 12 slides vertically, the helical engagement causes the lowermost third guide plate 13 on each support rod 12 to rotate, simultaneously causing the penultimate coil spring 14 to deform and store energy. The coil spring 14 then releases, simultaneously causing the penultimate third guide plate 13 to rotate, and so on, so that the third guide plates 13 on the same support rod 12 rotate sequentially from bottom to top. Furthermore, when the distance between adjacent blades 501 decreases, the third guide plate 13 begins to rotate, further enhancing the turbulence effect.

[0072] In a further embodiment, to simultaneously achieve the sliding of the support rod 12 and the position switching of the second guide plate 9, the chamber 1 is configured to be divided into two independent chambers in the vertical direction; the phosphorus enrichment system also includes a drive cylinder 15, which is installed in the lower independent chamber, with the output shaft of the drive cylinder 15 facing upward and a mounting plate 1501 fixedly installed at its end, the mounting plate 1501 being horizontally positioned; a first support ring 901 is inserted into the lower independent chamber and sleeved on the mounting plate 1501, with multiple spiral grooves 9011 provided on the inner circumferential wall of the first support ring 901, the multiple spiral grooves 9011 being arranged circumferentially; multiple spiral protrusions 15011 are provided on the circumferential sidewall of the mounting plate 1501, the spiral protrusions 15011 being corresponding to and slidably inserted into the spiral grooves 9011, and the first support ring 901 and the mounting plate 1501 forming a spiral engagement. Multiple guide posts 12011 are vertically and fixedly installed at the bottom of the third support ring 1201. The multiple guide posts 12011 are arranged circumferentially and inserted downward into the independent chamber located below. Multiple guide sleeves 15012 are vertically and fixedly installed at the top of the mounting plate 1501. The multiple guide sleeves 15012 are arranged circumferentially and are correspondingly and fixedly sleeved on the guide posts 12011, so that the third support ring 1201 can slide synchronously with the mounting plate 1501 in the vertical direction.

[0073] During use, when the drive cylinder 15 is activated and its output shaft extends, it synchronously drives the mounting plate 1501 to move upward. The mounting plate 1501, through the helical engagement between the helical protrusion 15011 and the helical groove 9011, drives the first support ring 901 to rotate. The first support ring 901 drives the second guide plate 9 to move from the first position to the second position. On the other hand, through the third support ring 1201, it drives all the support rods 12 to move upward, and through the helical engagement, drives the third guide plate 13 located at the bottom of each support rod 12 to rotate. This synchronously drives the second-to-last coil spring 14 to deform and store force. Then, the coil spring 14 releases and synchronously drives the second-to-last layer of third guide plates 13 to rotate. This process continues, causing the third guide plates 13 on the same support rod 12 to rotate sequentially from bottom to top.

[0074] When the output shaft of the drive cylinder 15 retracts, it synchronously drives the mounting plate 1501 to move downward. On the one hand, the mounting plate 1501 drives the first support ring 901 to rotate through the helical engagement between the helical protrusion 15011 and the helical groove 9011. The first support ring 901 drives the second guide plate 9 to move from the second position to the first position. On the other hand, it drives all the support rods 12 to move downward through the third support ring 1201, and through the helical engagement, drives the third guide plate 13 located at the bottom of each support rod 12 to rotate to the reset position. The coil spring 14 is released, and synchronously drives all the third guide plates 13 except the third guide plate 13 located at the bottom to rotate to the reset position.

[0075] Understandably, the drive cylinder 15 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0076] Another embodiment of the present invention also provides a phosphorus enrichment process, which employs any of the above-described phosphorus enrichment systems and includes the following steps:

[0077] S1. Adjust the positions of the upper sleeve 6 and the lower sleeve 7 according to the required shear mixing range and slurry circulation flow range. The larger the required shear mixing range and slurry circulation flow range, the larger the distance between the upper sleeve 6 and the lower sleeve 7.

[0078] Specifically, when the required shear mixing range and slurry circulation range are larger, the upper baffle sleeve 6 is adjusted to be higher / the lower baffle sleeve 7 is adjusted to be lower / the upper baffle sleeve 6 is adjusted to be higher and the lower baffle sleeve 7 is adjusted to be lower, thereby adjusting the axial height of the impeller 5 to be larger, adapting to the situation where the required shear mixing range and slurry circulation range are larger; similarly, when the required shear mixing range and slurry circulation range are smaller, the upper baffle sleeve 6 is adjusted to be lower / the lower baffle sleeve 7 is adjusted to be higher / the upper baffle sleeve 6 is adjusted to be lower and the lower baffle sleeve 7 is adjusted to be higher, thereby adjusting the axial height of the impeller 5 to be smaller, adapting to the situation where the required shear mixing range and slurry circulation range are smaller.

[0079] S2. Add the phosphorus-containing slurry into the silo 1;

[0080] S3 drives the central shaft 4 to rotate, and the central shaft 4 synchronously drives the impeller 5 to rotate, creating a negative pressure in the collection channel. Under the action of pressure difference, the outside air and the phosphorus-containing slurry in the bin 1 enter the collection channel and then flow to the impeller 5. At the same time, under the stop of the upper baffle sleeve 6, the upper protrusion 602, the lower baffle sleeve 7 and the lower protrusion 702, the distance between adjacent blades 501 increases and decreases periodically, so that the air and phosphorus-containing slurry between adjacent blades 501 form a radial pulse flow, which then forms bubbles. The bubbles float up and accumulate phosphorus-containing substances, and finally rise to the surface of the phosphorus-containing slurry and form a foam layer.

[0081] Specifically, when the bottom of the upper sleeve 6 and the guide rod 5013 form a stop fit, the distance between adjacent blades 501 on the upper half is the largest, with the middle blade 501 as the dividing line. At this time, the bottom of the lower sleeve 7 and the guide rod 5013 form a stop fit, and the distance between adjacent blades 501 on the lower half is the largest. When the upper protrusion 602 and the guide rod 5013 form a stop fit, the distance between adjacent blades 501 on the upper half is the smallest. At this time, the lower protrusion 702 and the guide rod 5013 form a stop fit, and the distance between adjacent blades 501 on the lower half is the smallest. This causes the distance between adjacent blades 501 to increase and decrease periodically, thereby causing the air and phosphorus-containing slurry between adjacent blades 501 to form a radial pulse flow.

[0082] S4. The foam is scraped out of the chamber 1 by the foam scraper assembly 2.

[0083] Specifically, the foam is scraped out of the chamber 1 by the rotation of the scraper 203.

[0084] The technical features of the above embodiments can be combined in any way.

Claims

1. A phosphorus enrichment system, characterized in that, Phosphorus enrichment systems include: The silo is configured to receive phosphorus-containing slurry; The foam scraping assembly is configured to scrape out the foam formed inside the chamber. The material collection sleeve is vertically inserted into the silo body; The central shaft is vertically inserted into the collecting sleeve and can rotate around its own axis; The impeller is sleeved on the central shaft and can rotate synchronously with the central shaft; a material collection channel is formed between the central shaft and the material collection sleeve, and the material collection channel is connected to the bin body and the impeller, and is configured to receive air from the outside and phosphorus-containing slurry from the bin body, and to guide both to the impeller; the impeller has an odd number of blades, which are arranged vertically, and the blade in the middle is fixedly connected to the central shaft. A first elastic element is connected between adjacent blades. Under the action of the first elastic element, all blades except the blade in the middle can slide elastically in the vertical direction. The blades have a ring-shaped wave structure. The upper sleeve is set at the bottom of the collecting sleeve and sleeved on the outer periphery of the central shaft. The bottom of the upper sleeve is provided with at least one upper protrusion. The bottom of the upper sleeve and the upper protrusion can form a stop engagement with the uppermost blade. The upper sleeve can slide in the vertical direction and the position after sliding can be locked. The lower baffle is located at the bottom of the chamber and is sleeved on the outer periphery of the central shaft. The inner bottom of the lower baffle has at least one lower protrusion, which is corresponding to the upper protrusion. The inner bottom of the lower baffle and the lower protrusion can both form a stop with the blade located at the bottommost position. The lower baffle can slide in the vertical direction, and the position after sliding can be locked. The bottom of the tank is provided with multiple first guide plates, which are arranged at intervals around the central axis; the first guide plates are vertically arranged and extend radially along the central axis. The bottom of the hopper is equipped with multiple second guide vanes, which are vertically arranged and spaced circumferentially along the central axis, alternating with the first guide vanes. These second guide vanes can rotate synchronously around the central axis, and have corresponding first and second positions before and after rotation. In the first position, the second guide vanes and the first guide vanes are in close contact; in the second position, they are spaced apart and extend radially along the central axis. When the distance between adjacent blades decreases, the second guide vanes switch from the first position to the second position. An upper end cover is slidably sleeved on the upper sleeve; a lower end cover is slidably sleeved on the lower sleeve. The lower end cover and the upper end cover are spaced apart and vertically connected by multiple support rods. The multiple support rods are arranged circumferentially along the central axis. Each support rod is sleeved with multiple third guide plates. The multiple third guide plates on the same support rod are arranged circumferentially along the extension direction of the support rod. The third guide plates are configured to guide airflow radially along the central axis.

2. The phosphorus enrichment system according to claim 1, characterized in that, Multiple third guide vanes on the same support rod are staggered from bottom to top.

3. The phosphorus enrichment system according to claim 2, characterized in that, The third guide vane can rotate around the support rod; all support rods can slide synchronously in the vertical direction; the lowest third guide vane on each support rod forms a helical fit with the support rod, and the other third guide vanes are connected to the lower third guide vane through the second elastic element. Under the action of the second elastic element, when the lower third guide vane rotates, the upper guide vane can rotate accordingly; when the distance between adjacent blades decreases, the third guide vane begins to rotate.

4. The phosphorus enrichment system according to claim 3, characterized in that, The phosphorus enrichment system also includes a drive cylinder with its output shaft facing upwards and a mounting plate fixed at its end; all the second guide plates are mounted on the first support ring, which is sleeved on the mounting plate and can rotate around its own axis. A spiral groove is provided on the inner circumferential wall of the first support ring, and a spiral protrusion is provided on the circumferential side wall of the mounting plate. The spiral protrusion is slidably inserted into the spiral groove, so that the first support ring and the mounting plate form a spiral fit.

5. The phosphorus enrichment system according to claim 3, characterized in that, The second elastic element is a coil spring.

6. The phosphorus enrichment system according to claim 1, characterized in that, The first elastic element is an elastic washer, which is fitted onto the central shaft and abuts against two adjacent blades.

7. A phosphorus enrichment process, characterized in that, Using the phosphorus enrichment system as described in claim 1, the phosphorus enrichment process includes the following steps: S1. Adjust the positions of the upper and lower baffles according to the required shear mixing range and slurry circulation flow range. The larger the required shear mixing range and slurry circulation flow range, the larger the distance between the upper and lower baffles. S2. Add the phosphorus-containing slurry into the silo; S3 drives the central shaft to rotate, and the central shaft synchronously drives the impeller to rotate, creating a negative pressure in the collection channel. Under the action of pressure difference, the outside air and the phosphorus-containing slurry in the bin enter the collection channel and then flow to the impeller. At the same time, under the stop of the upper sleeve, upper protrusion, lower sleeve and lower protrusion, the distance between adjacent blades increases and decreases periodically, so that the air and phosphorus-containing slurry between adjacent blades form a radial pulse flow. Then the air forms bubbles, and the bubbles float up while accumulating phosphorus-containing substances, and finally rise to the surface of the phosphorus-containing slurry to form a foam layer. S4. The foam is scraped out of the tank body by the foam scraper assembly.

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