Lithium phosphate precipitation device for recovering concentrated mother liquor

Abstract

The invention relates to the technical field of concentrated mother liquor recovery, in particular to a lithium phosphate precipitation device for concentrated mother liquor recovery, which comprises a mounting seat, a wrapping box, a reaction kettle, a feed pipe and the like, the wrapping box is connected onto the mounting seat, the reaction kettle is connected into the wrapping box, and the feed pipe is connected to the top of the reaction kettle. Concentrated mother liquor and lithium phosphate can be sucked into the tank body through the first water pump, large-particle lithium phosphate is preliminarily precipitated in the tank body so as to separate the concentrated mother liquor from the lithium phosphate, the concentrated mother liquor and small-particle lithium phosphate can be sucked into the precipitation box through the second water pump, the small-particle lithium phosphate is precipitated in the precipitation box, and the lithium phosphate is separated from the concentrated mother liquor. The concentrated mother liquor and large-particle lithium phosphate are preliminarily separated in the tank body, and a small amount of lithium phosphate can be naturally settled more quickly, so that the precipitation separation time can be shortened, quick precipitation separation of lithium phosphate is realized, and the recovery efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concentrated mother liquor recovery, and in particular to a lithium phosphate precipitation device for recovering concentrated mother liquor. Background Art

[0002] Lithium phosphate precipitation is an effective method for recovering lithium ions from concentrated mother liquors, particularly when treating industrial wastewater or mineral leachates containing lithium. This method, based on the principle of chemical precipitation, involves adjusting solution conditions to precipitate lithium as lithium phosphate, thereby achieving lithium recovery.

[0003] At present, most precipitation devices still use the traditional single precipitation process structure. The lithium phosphate after the reaction relies on gravity to naturally settle in the precipitation box. The precipitation and separation process is time-consuming and still requires a long period of standing to complete the separation of concentrated mother liquor and lithium phosphate. Rapid precipitation and separation cannot be achieved, affecting the recovery efficiency. From the perspective of large-scale production scenarios, this slow precipitation method is difficult to meet the needs of efficient production, limiting the improvement of overall recovery efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a lithium phosphate precipitation device for recovering concentrated mother liquor, which can overcome the shortcomings of relying on natural sedimentation by gravity, the precipitation and separation process is time-consuming, and a long period of standing is still required to complete the separation of concentrated mother liquor and lithium phosphate, and rapid precipitation and separation cannot be achieved, which affects the recovery efficiency.

[0005] The technical solution of the present invention is: a lithium phosphate precipitation device for recovering concentrated mother liquor, comprising a mounting seat, a wrapping box, a reactor, a feed pipe, a mounting frame, a sedimentation tank, a first discharge pipe, a first valve, an annular plate, a blocking ring, a separation mechanism, a heating mechanism, a stirring mechanism and a drainage mechanism, wherein the mounting seat is connected to the wrapping box, the reactor is connected to the wrapping box, the top of the reactor is connected to the feed pipe, the mounting seat is connected to the mounting frame, the top of the mounting frame is connected to the sedimentation tank, the bottom of the sedimentation tank is connected to the first discharge pipe, the first valve is installed on the first discharge pipe, the sedimentation tank is connected to the annular plate, the top of the annular plate is connected to the blocking ring, the concentrated mother liquor and the precipitant are poured into the reactor, lithium ions and phosphate ions react in the reactor to generate lithium phosphate, the separation mechanism is used to separate the concentrated mother liquor and the lithium phosphate, the heating mechanism is used to heat the concentrated mother liquor and the precipitant in the reactor, the stirring mechanism is used to stir the concentrated mother liquor and the precipitant in the reactor, the concentrated mother liquor and lithium phosphate will enter the sedimentation tank for precipitation, and the drainage mechanism is used to discharge the concentrated mother liquor in the sedimentation tank.

[0006] As a preferred technical solution of the present invention, the separation mechanism includes a first water pump, a discharge pipe, a guide pipe, a tank body, a discharge pipe, a second discharge pipe, a second valve, a circular box, a straight pipe, a conical baffle, a bend pipe, a drainage box, a support frame, a second water pump, a suction pipe, a first water outlet pipe, a second water outlet pipe, a first hard pipe, an electromagnetic valve, a first hose, a first float box and a first float plate. The first water pump is installed on the top of the mounting frame, the discharge pipe is connected to the bottom of the reactor, the discharge pipe is connected to the water inlet end of the first water pump, and the first The water outlet of the water pump is connected to a guide pipe, the top of the mounting frame is connected to a tank body, the guide pipe seals and penetrates the tank body, the bottom of the tank body is connected to a discharge pipe, the discharge pipe is connected to a second discharge pipe, the lower end of the first discharge pipe is connected to the top of the second discharge pipe, the second discharge pipe is installed with a second valve, the top of the tank body is connected to a circular box, the top of the circular box is provided with a drainage hole, the circular box is connected to a straight pipe, the guide pipe and the straight pipe are connected, the first water pump is used to suck the concentrated mother liquor and lithium phosphate in the reactor into the tank body, the phosphoric acid Lithium is initially precipitated in the tank body to separate the concentrated mother liquor and lithium phosphate. The concentrated mother liquor and small particles of lithium phosphate will overflow through the drainage hole. The lower end of the straight pipe is connected to a conical baffle, and the straight pipe is connected to a bend pipe with filter holes. The bend pipe is connected to a drainage box, which is connected to the inner wall of the tank. The top of the mounting frame is connected to a support frame, and the top of the support frame is installed with a second water pump. A suction pipe is connected to the tank body, and the suction pipe is connected to the water inlet end of the second water pump. The water outlet end of the second water pump is connected to the first water outlet. The first water outlet pipe is connected to the second water outlet pipe, the second water outlet pipe is sealed and passes through the sedimentation tank, the second water pump is used to suck the concentrated mother liquor and small particles of lithium phosphate into the sedimentation tank, and the small particles of lithium phosphate are precipitated in the sedimentation tank. The suction pipe is connected to a first hard pipe, an electromagnetic valve is installed on the first hard pipe, the first hard pipe is connected to a first hose, the first hose extends into the tank body through the drain hole, the first hose is connected to a first float box, a first suction hole is opened on the first float box, and a first float plate is connected to the top of the first float box.

[0007] As a preferred technical solution of the present invention, the heating mechanism includes a liquid inlet pipe, a liquid outlet pipe, a heating pipe and a support plate. The top of the parcel box is connected to the liquid inlet pipe, the bottom of the parcel box is connected to the liquid outlet pipe, the heating pipe is installed inside the parcel box, and the support plate is connected inside the parcel box.

[0008] As a preferred technical solution of the present invention, the stirring mechanism includes a stirring motor and a stirring paddle. The stirring motor is installed on the top of the reactor. The top of the reactor is rotatably connected to the stirring paddle, and the output shaft of the stirring motor is connected to the stirring paddle.

[0009] As a preferred technical solution of the present invention, the drainage mechanism includes a first drainage pipe, a second hard pipe, a second hose, a second float box and a second float plate. The first drainage pipe is connected to the sedimentation box, the top of the first drainage pipe is connected to the second hard pipe, the second hard pipe passes through the annular plate, the second hard pipe is connected to the second hose, the second hose is located in the sedimentation box, the second hose is connected to the second float box, the second float box is provided with a second suction hole, and the top of the second float box is connected to the second float plate.

[0010] As an optimal technical solution of the present invention, it also includes a blocking mechanism, which includes a blocking net, an outer gear ring, a scraper, a rotating shaft, a gear and a servo motor. The blocking net is connected inside the annular plate, the bottom of the annular plate is rotatably connected to the outer gear ring, the scraper is connected to the outer gear ring, the top of the scraper is in contact with the bottom of the blocking net, the annular plate is rotatably connected to the rotating shaft, the rotating shaft is connected to a gear, the gear and the outer gear ring are meshed, and a servo motor is installed in the sedimentation box, and the output shaft of the servo motor is connected to the rotating shaft.

[0011] As a preferred technical solution of the present invention, it also includes an acceleration mechanism, which includes a mounting pipe, a vertical pipe, a conical contact plate, a third water pump, a through pipe, a conical silicone plate, a conical bucket, a fourth water pump, a conical head and a second drain pipe. The retaining net is connected to the mounting pipe, the lower end of the mounting pipe is connected to the vertical pipe, the second water outlet pipe is connected to the vertical pipe, the lower end of the vertical pipe is connected to the conical contact plate, the third water pump is installed in the mounting pipe, the water inlet end of the third water pump is connected to the through pipe, and the through pipe penetrates the mounting pipe. The lower end and the upper end of the vertical pipe are provided with a third suction hole at the lower part of the through-tube, and the lower part of the through-tube is connected to a conical silicone plate, which contacts the inner wall of the conical contact plate. The water outlet of the third water pump is connected to a conical bucket, and a fourth water pump is installed in the mounting pipe. The water outlet of the fourth water pump passes through the upper end of the mounting pipe, and the water inlet of the fourth water pump is connected with a conical head, which is located in the conical bucket, and fine holes are provided at the bottom of the conical head. The water outlet of the fourth water pump is connected to a second drain pipe, and a discharge port is provided at the lower part of the mounting pipe.

[0012] As a preferred technical solution of the present invention, it also includes an anti-blocking mechanism, which includes an air pump, an air pipe, an air box and a one-way air outlet head. The air pump is installed on the sedimentation box, and the air pipe is connected to the air outlet end of the air pump. The air pipe seal passes through the sedimentation box, and the air pipe is connected to the air box. The top of the air box is connected to the one-way air outlet head, and the one-way air outlet head surrounds the through-pipe.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The present invention can suck the concentrated mother liquor and lithium phosphate into the tank body through the first water pump, and the large particles of lithium phosphate are preliminarily precipitated in the tank body to separate the concentrated mother liquor and lithium phosphate. The concentrated mother liquor and small particles of lithium phosphate can be sucked into the sedimentation tank through the second water pump, and the small particles of lithium phosphate are precipitated in the sedimentation tank. The concentrated mother liquor and large particles of lithium phosphate have been preliminarily separated in the tank body. A small amount of lithium phosphate can naturally settle faster, which can shorten the precipitation and separation time, realize the rapid precipitation and separation of lithium phosphate, and improve the recovery efficiency.

[0014] 2. The lithium phosphate can be blocked by the blocking net to prevent the lithium phosphate from floating upward, thereby preventing the lithium phosphate from falling onto the annular plate and further preventing the lithium phosphate from leaking.

[0015] 3. The concentrated mother liquor can be sucked into the second drain pipe through the third water pump and the fourth water pump. The concentrated mother liquor flows to the annular plate through the second drain pipe and is discharged through the first drain pipe, thereby reducing the concentrated mother liquor content in the sedimentation tank, accelerating the precipitation of lithium phosphate, and further improving the recovery efficiency.

[0016] 4. Air can be sucked into the air box through the air pump, and the air is ejected through the one-way air outlet. The air can blow the small particles of lithium phosphate next to the third suction hole to prevent the small particles of lithium phosphate from blocking the third suction hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the sedimentation box, the first discharge pipe, the first valve, the annular plate and the blocking ring of the present invention.

[0019] Figure 3 This is a schematic diagram of the first three-dimensional structure of the separation mechanism of the present invention.

[0020] Figure 4 This is a schematic diagram of the second three-dimensional structure of the separation mechanism of the present invention.

[0021] Figure 5 It is a partial three-dimensional structural schematic diagram of the separation mechanism of the present invention.

[0022] Figure 6 It is a cross-sectional view of the tank body of the present invention.

[0023] Figure 7 It is a cross-sectional view of the straight pipe of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the first hard tube, the solenoid valve, the first hose and the first floating plate of the present invention.

[0025] Figure 9It is a schematic diagram of the three-dimensional structure of the first floating box, the first suction hole and the first floating plate of the present invention.

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the heating mechanism of the present invention.

[0027] Figure 11 It is a cross-sectional view of the package box and the reactor of the present invention.

[0028] Figure 12 It is a cross-sectional view of the sedimentation box, annular plate and barrier ring of the present invention.

[0029] Figure 13 It is a schematic diagram of the three-dimensional structure of the second floating box, the second suction hole and the second floating plate of the present invention.

[0030] Figure 14 This is a schematic diagram of the first three-dimensional structure of the blocking mechanism of the present invention.

[0031] Figure 15 This is a schematic diagram of a second three-dimensional structure of the blocking mechanism of the present invention.

[0032] Figure 16 It is a schematic diagram of the three-dimensional structure of the acceleration mechanism of the present invention.

[0033] Figure 17 It is a cross-sectional view of the installation pipe and the vertical pipe of the present invention.

[0034] Figure 18 It is a schematic diagram of the three-dimensional structure of the through tube and the third suction hole of the present invention.

[0035] Figure 19 It is a cross-sectional view of the installation tube and the conical bucket of the present invention.

[0036] Figure 20 It is a schematic diagram of the three-dimensional structure of the conical head and the fine hole of the present invention.

[0037] Figure 21 This is a schematic diagram of the first three-dimensional structure of the anti-blocking mechanism of the present invention.

[0038] Figure 22 This is a schematic diagram of the second three-dimensional structure of the anti-blocking mechanism of the present invention.

[0039] The markings in the figure are: 1. mounting base, 2. package box, 3. reactor, 4. feed pipe, 5. mounting frame, 6. sedimentation box, 7. first discharge pipe, 8. first valve, 9. annular plate, 10. blocking ring, 111. first water pump, 112. discharge pipe, 113. guide pipe, 114. tank body, 115. discharge pipe, 116. second discharge pipe, 117. second valve, 118. circular box, 119. drainage hole, 11 10. Straight pipe, 1111. Conical baffle, 1112. Bend pipe, 1113. Filter hole, 1114. Drain box, 1115. Support frame, 1116. Second water pump, 1117. Suction pipe, 1118. First water outlet pipe, 1119. Second water outlet pipe, 1120. First hard pipe, 1121. Solenoid valve, 1122. First hose, 1123. First float box, 1124. First suction hole, 1125. First float plate , 121, liquid inlet pipe, 122, liquid outlet pipe, 123, heating pipe, 124, support plate, 131, stirring motor, 132, stirring paddle, 141, first drain pipe, 142, second hard pipe, 143, second hose, 144, second float box, 145, second suction hole, 146, second float plate, 151, baffle, 152, outer gear ring, 153, scraper, 154, rotating shaft, 155, gear, 156, servo motor Machine, 161, mounting pipe, 162, vertical pipe, 163, conical contact plate, 164, third water pump, 165, through pipe, 166, third suction hole, 167, conical silicone plate, 168, conical bucket, 169, fourth water pump, 1610, conical head, 1611, fine hole, 1612, second drain pipe, 1613, discharge port, 171, air pump, 172, air pipe, 173, air box, 174, one-way air outlet head. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0041] See also Figures 1-13A lithium phosphate precipitation device for recovering concentrated mother liquor includes a mounting base 1, a wrapping box 2, a reactor 3, a feed pipe 4, a mounting frame 5, a sedimentation box 6, a first discharge pipe 7, a first valve 8, an annular plate 9, a blocking ring 10, a separation mechanism, a heating mechanism, a stirring mechanism, and a drainage mechanism. The mounting base 1 is connected to the wrapping box 2 on the top, the reactor 3 is connected to the reactor 3 inside the wrapping box 2, the feed pipe 4 is connected to the left and right sides of the top of the reactor 3, the mounting base 1 is connected to the right side, the mounting frame 5 is connected to the sedimentation box 6 on the right side of the top of the mounting frame 5, the sedimentation box 6 is connected to the first discharge pipe 7 in the middle of the bottom, and the first discharge pipe 7 is connected to the reactor 3. A first valve 8 is installed on it, an annular plate 9 is connected to the upper part of the sedimentation box 6, and a blocking ring 10 is connected to the top of the annular plate 9. The concentrated mother liquor and the precipitant are poured into the reactor 3, and the lithium ions and phosphate ions react in the reactor 3 to generate lithium phosphate. The separation mechanism is used to separate the concentrated mother liquor and the lithium phosphate, the heating mechanism is used to heat the concentrated mother liquor and the precipitant in the reactor 3, and the stirring mechanism is used to stir the concentrated mother liquor and the precipitant in the reactor 3. The concentrated mother liquor and lithium phosphate will enter the sedimentation box 6 for precipitation, and the drainage mechanism is used to discharge the concentrated mother liquor in the sedimentation box 6.

[0042] See also Figure 3-Figure 9The separation mechanism includes a first water pump 111, a discharge pipe 112, a guide pipe 113, a tank body 114, a discharge pipe 115, a second discharge pipe 116, a second valve 117, a circular box 118, a straight pipe 1110, a conical baffle 1111, a bend pipe 1112, a drainage box 1114, a support frame 1115, a second water pump 1116, a suction pipe 1117, a first water outlet pipe 1118, a second water outlet pipe 1119, a first hard pipe 1120, a solenoid valve 1121, a first hose 1122, a first float box 1123 and a first float plate 1125. The first water pump 111 is installed on the left side of the top of the mounting frame 5, and the discharge pipe 112 is connected to the middle of the bottom of the reactor 3. 12 is connected to the water inlet end of the first water pump 111, and the front and rear sides of the water outlet end of the first water pump 111 are connected to the guide pipe 113. The front and rear sides of the left side of the top of the mounting frame 5 are connected to the tank body 114. The guide pipe 113 seals and passes through the left side of the tank body 114. The middle of the bottom of the tank body 114 is connected to a discharge pipe 115. A second discharge pipe 116 is connected between the two discharge pipes 115. The lower end of the first discharge pipe 7 is connected to the top of the second discharge pipe 116. A second valve 117 is installed on the second discharge pipe 116. The top of the tank body 114 is connected to a circular box 118. The top of the circular box 118 is evenly spaced with drainage holes 119. The middle of the circular box 118 is connected to a straight pipe 1110. The right end of the material pipe 113 is connected to the left side of the straight pipe 1110, and the lower end of the straight pipe 1110 is connected to a conical baffle 1111. Four elbows 1112 are evenly spaced apart at the lower part of the straight pipe 1110. The four elbows 1112 are evenly spaced apart at one end close to each other with filter holes 1113. The upper ends of the elbows 1112 are connected to a drainage box 1114, and the drainage box 1114 is connected to the inner wall of the tank body 114. A support frame 1115 is connected to the middle of the top of the mounting frame 5. A second water pump 1116 is installed on both the front and rear sides of the top of the support frame 1115. A suction pipe 1117 is connected to the upper right side of the tank body 114. The suction pipe 1117 is connected to the water inlet end of the second water pump 1116. The second water pump 1116 The water outlet end is connected to a first water outlet pipe 1118, a second water outlet pipe 1119 is connected between the two first water outlet pipes 1118, the second water outlet pipe 1119 is sealed and passes through the left side of the sedimentation tank 6, the left side of the suction pipe 1117 is connected to a first hard pipe 1120, the upper part of the first hard pipe 1120 is installed with a solenoid valve 1121, the lower end of the first hard pipe 1120 is connected to a first hose 1122, the first hose 1122 extends into the tank body 114 through the drainage hole 119, the lower end of the first hose 1122 is connected to a first float box 1123, the outer circumference of the first float box 1123 is evenly spaced with first suction holes 1124, and the top of the first float box 1123 is connected to a first float plate 1125.

[0043] See also Figure 10 and Figure 11The heating mechanism includes a liquid inlet pipe 121, a liquid outlet pipe 122, a heating pipe 123 and a support plate 124. The liquid inlet pipe 121 is connected to the top of the parcel box 2, the liquid outlet pipe 122 is connected to the bottom of the parcel box 2, the heating pipes 123 are evenly spaced around the inside of the parcel box 2, and the support plate 124 is evenly spaced around the lower part of the parcel box 2.

[0044] See also Figure 11 The stirring mechanism includes a stirring motor 131 and a stirring paddle 132. The stirring motor 131 is installed in the middle of the top of the reactor 3. The stirring paddle 132 is rotatably connected to the top of the reactor 3. The output shaft of the stirring motor 131 and the upper end of the stirring paddle 132 are connected by a coupling.

[0045] See also Figure 12 and Figure 13 The drainage mechanism includes a first drainage pipe 141, a second hard pipe 142, a second hose 143, a second float box 144 and a second float plate 146. The first drainage pipe 141 is connected to the upper right side of the sedimentation tank 6, and the top of the first drainage pipe 141 is connected to the second hard pipe 142. The second hard pipe 142 passes through the right part of the annular plate 9. The lower end of the second hard pipe 142 is connected to the second hose 143. The second hose 143 is located in the sedimentation tank 6. The lower end of the second hose 143 is connected to the second float box 144. Second suction holes 145 are evenly spaced on the left side of the second float box 144, and the top of the second float box 144 is connected to the second float plate 146.

[0046] The staff pours the concentrated mother liquor and precipitant into the reactor 3 through the feed pipe 4, and then injects the heat transfer oil into the package box 2 through the liquid inlet pipe 121. The heating pipe 123 heats the heat transfer oil, and the heat transfer oil transfers the heat to the reactor 3. Then the heat transfer oil is discharged through the liquid outlet pipe 122. The heat transfer oil circulates in the package box 2, which can keep the temperature of the reactor 3 within a suitable range. The concentrated mother liquor and precipitant will make the reactor 3 heavier. The support plate 124 can support the inside of the package box 2 to improve the stability of the package box 2. The output shaft of the stirring motor 131 can drive the stirring paddle 132 to rotate. The stirring paddle 132 stirs the concentrated mother liquor and precipitant. The lithium ions and phosphate ions react to generate lithium phosphate. The first water pump 111 passes through The discharge pipe 112 extracts the concentrated mother liquor and lithium phosphate in the reactor 3, and the concentrated mother liquor and lithium phosphate flow into the straight pipe 1110 through the guide pipe 113, and then the concentrated mother liquor and lithium phosphate flow into the tank body 114, and the lithium phosphate is preliminarily precipitated in the tank body 114 to separate the concentrated mother liquor and lithium phosphate. The conical baffle 1111 can block part of the lithium phosphate to prevent excessive lithium phosphate from floating upward. The first float box 1123 floats on the concentrated mother liquor through the first float plate 1125, and the concentrated mother liquor enters the first float box 1123 through the first suction hole 1124. As time goes by, the concentrated mother liquor and lithium phosphate in the tank body 114 increase, and a part of the concentrated mother liquor enters the elbow 1112 through the filter hole 1113 and is discharged through the drainage. The concentrated mother liquor and the small particles of lithium phosphate will overflow through the drainage hole 119 and flow into the suction pipe 1117. The second water pump 1116 extracts the concentrated mother liquor and the small particles of lithium phosphate through the suction pipe 1117. The concentrated mother liquor and the small particles of lithium phosphate flow into the sedimentation tank 6 through the first outlet pipe 1118 and the second outlet pipe 1119. The small particles of lithium phosphate are precipitated in the sedimentation tank 6. The second float 144 floats on the concentrated mother liquor through the second float plate 146. The concentrated mother liquor will flow through the second suction hole 14 After the large particles of lithium phosphate in the tank body 114 are precipitated into the second float tank 144, the solenoid valve 1121 is controlled to open, and the concentrated mother liquor in the tank body 114 is sucked into the first float tank 1123 through the first suction hole 1124. Subsequently, the concentrated mother liquor flows into the sedimentation tank 6 through the first hose 1122, the first hard tube 1120, the first outlet pipe 1118 and the second outlet pipe 1119. The liquid level in the tank body 114 will drop, and the first float tank 1123 will drop along with the liquid level in the tank body 114, completing the separation of the large particles of lithium phosphate and the concentrated mother liquor. The second valve 117 can be opened, and the large particles of lithium phosphate in the tank body 114 are discharged through the discharge pipe 115 and the second discharge pipe 116. The large particles of lithium phosphate in the tank body 114 are discharged first.In order to clean the inside of the tank body 114, as time goes by, the concentrated mother liquor and small particles of lithium phosphate in the sedimentation tank 6 increase. The blocking ring 10 can block the small particles of lithium phosphate, and the concentrated mother liquor will overflow through the blocking ring 10 and flow onto the annular plate 9. Then the concentrated mother liquor is discharged through the first drain pipe 141. The concentrated mother liquor and large particles of lithium phosphate have been preliminarily separated in the tank body 114. The concentrated mother liquor and small particles of lithium phosphate are separated in the sedimentation tank 6. A small amount of lithium phosphate can naturally settle faster, which can shorten the precipitation and separation time and achieve rapid precipitation and separation of lithium phosphate. To improve recovery efficiency, after the small particles of lithium phosphate in the sedimentation tank 6 have been precipitated, a self-priming pump is connected to the first drain pipe 141. The self-priming pump draws the concentrated mother liquor into the second float tank 144 through the second suction hole 145. The concentrated mother liquor then flows into the first drain pipe 141 through the second hose 143 and the second rigid pipe 142. The liquid level in the sedimentation tank 6 will drop, and the second float tank 144 will drop along with the liquid level in the sedimentation tank 6, completing the separation of the small particles of lithium phosphate and the concentrated mother liquor. The first valve 8 is opened, and the small particles of lithium phosphate in the sedimentation tank 6 are discharged through the first discharge pipe 7 and the second discharge pipe 116.

[0047] See also Figure 14 and Figure 15 , also includes a blocking mechanism, the blocking mechanism includes a blocking net 151, an outer gear ring 152, a scraper 153, a rotating shaft 154, a gear 155 and a servo motor 156, the blocking net 151 is connected to the annular plate 9, the bottom of the annular plate 9 is rotatably connected to the outer gear ring 152, the left and right sides of the outer gear ring 152 are connected to the scraper 153, the top of the scraper 153 is in contact with the bottom of the blocking net 151, the front of the annular plate 9 is rotatably connected to the rotating shaft 154, the lower end of the rotating shaft 154 is connected to the gear 155 through a key, the gear 155 and the outer gear ring 152 are engaged, and a servo motor 156 is installed on the upper front side of the sedimentation box 6, and the output shaft of the servo motor 156 and the upper end of the rotating shaft 154 are connected by a coupling.

[0048] The baffle 151 can block the lithium phosphate and prevent it from floating upward, thereby preventing it from falling onto the annular plate 9 and further preventing it from leaking. The output shaft of the servo motor 156 can drive the rotating shaft 154 to rotate, the rotating shaft 154 drives the gear 155 to rotate, the gear 155 drives the outer ring gear 152 to rotate, and the outer ring gear 152 drives the scraper 153 to rotate. The scraper 153 can scrape off the lithium phosphate attached to the bottom of the baffle 151 to prevent the lithium phosphate from blocking the baffle 151 and ensure that the concentrated mother liquor can pass through the baffle 151.

[0049] See also Figures 16-20, also includes an acceleration mechanism, the acceleration mechanism includes a mounting pipe 161, a vertical pipe 162, a conical contact plate 163, a third water pump 164, a through pipe 165, a conical silicone plate 167, a conical bucket 168, a fourth water pump 169, a conical head 1610 and a second drain pipe 1612, the middle part of the retaining net 151 is connected to the mounting pipe 161, the lower end of the mounting pipe 161 is connected to the vertical pipe 162, the right end of the second water outlet pipe 1119 is connected to the upper left part of the vertical pipe 162, the lower end of the vertical pipe 162 is connected to the conical contact plate 163, the lower part of the mounting pipe 161 is installed in the lower part of the mounting pipe 164, the water inlet end of the third water pump 164 is connected to the through pipe 165, the through pipe 165 passes through the lower end of the mounting pipe 161 and the upper end of the vertical pipe 162, The lower part of the through-tube 165 is circumferentially evenly spaced with third suction holes 166, the lower part of the through-tube 165 is connected to a conical silicone plate 167, the conical silicone plate 167 is in contact with the inner wall of the conical contact plate 163, the water outlet end of the third water pump 164 is connected to a conical bucket 168, the upper inner part of the mounting tube 161 is installed with a fourth water pump 169, the water outlet end of the fourth water pump 169 passes through the upper end of the mounting tube 161, the water inlet end of the fourth water pump 169 is connected with a conical head 1610, the conical head 1610 is located in the conical bucket 168, the bottom of the conical head 1610 is evenly spaced with fine holes 1611, the water outlet end of the fourth water pump 169 is connected to a second drain pipe 1612, and the lower part of the mounting tube 161 is circumferentially evenly spaced with discharge ports 1613.

[0050] The concentrated mother liquor and small particles of lithium phosphate flow into the vertical pipe 162 through the second outlet pipe 1119. The conical silica gel plate 167 can reduce the impact force of the concentrated mother liquor and small particles of lithium phosphate to prevent the lithium phosphate in the sedimentation tank 6 from floating violently due to excessive impact force. The concentrated mother liquor and small particles of lithium phosphate will squeeze the conical silica gel plate 167, and the conical silica gel plate 167 will be deformed. The concentrated mother liquor and small particles of lithium phosphate flow into the sedimentation tank 6 through the gap between the conical silica gel plate 167 and the conical contact plate 163. The third water pump 164 sucks the concentrated mother liquor into the through-tube 165 through the third suction hole 166. The third suction hole 166 can filter the small particles of lithium phosphate to prevent small particles of lithium phosphate from entering the through-tube 165, but even finer particles of lithium phosphate will enter the through-tube 165 through the third suction hole 166. In the tube 165, the concentrated mother liquor and finer particles of lithium phosphate will flow into the conical bucket 168, and the fourth water pump 169 will suck the concentrated mother liquor into the conical head 1610 through the fine hole 1611. The fine hole 1611 can filter the finer particles of lithium phosphate to prevent the finer particles of lithium phosphate from entering the conical head 1610. The finer particles of lithium phosphate will follow the concentrated mother liquor to overflow from the conical bucket 168 and fall into the installation tube 161, and be discharged through the discharge port 1613 to prevent the finer particles of lithium phosphate from blocking the fine hole 1611. The concentrated mother liquor in the conical head 1610 will flow to the annular plate 9 through the second drain pipe 1612 and be discharged through the first drain pipe 141, thereby reducing the content of concentrated mother liquor in the sedimentation tank 6, accelerating the precipitation of lithium phosphate, and further improving the recovery efficiency.

[0051] See also Figure 21 and Figure 22 , and also includes an anti-blocking mechanism, which includes an air pump 171, an air pipe 172, an air box 173 and a one-way air outlet head 174. The air pump 171 is installed on the lower right side of the sedimentation box 6, and the air pipe 172 is connected to the air outlet end of the air pump 171. The air pipe 172 seals and passes through the lower right side of the sedimentation box 6. The left end of the air pipe 172 is connected to the air box 173. The top of the air box 173 is evenly spaced around the circumference with one-way air outlet heads 174, and the one-way air outlet heads 174 surround the through-tube 165.

[0052] The air pump 171 can suck air into the air pipe 172, and the air flows into the air box 173 through the air pipe 172 and is ejected through the one-way air outlet head 174. The air can blow the small particles of lithium phosphate next to the third suction hole 166 to prevent the small particles of lithium phosphate from blocking the third suction hole 166.

[0053] The above description is merely an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention are intended to be included within the scope of protection of the present invention. Any content not elaborated in detail herein is already known to those skilled in the art.

Claims

1. A lithium phosphate precipitation device for recovering concentrated mother liquor, comprising a mounting base (1), a wrapping box (2), a reactor (3) and a feed pipe (4), wherein the mounting base (1) is connected to the wrapping box (2), the reactor (3) is connected inside the wrapping box (2), and the top of the reactor (3) is connected to the feed pipe (4), characterized in that: The invention also includes a mounting frame (5), a sedimentation box (6), a first discharge pipe (7), a first valve (8), an annular plate (9), a blocking ring (10), a separation mechanism, a heating mechanism, a stirring mechanism and a drainage mechanism. The mounting base (1) is connected to the mounting frame (5), the top of the mounting frame (5) is connected to the sedimentation box (6), the bottom of the sedimentation box (6) is connected to the first discharge pipe (7), the first valve (8) is installed on the first discharge pipe (7), the inside of the sedimentation box (6) is connected to the annular plate (9), the top of the annular plate (9) is connected to the blocking ring (10), and the bottom of the annular plate (9) is connected to the first discharge pipe (7). The ring (10) pours the concentrated mother liquor and the precipitant into the reactor (3), and the lithium ions and phosphate ions react in the reactor (3) to generate lithium phosphate. The separation mechanism is used to separate the concentrated mother liquor and the lithium phosphate. The heating mechanism is used to heat the concentrated mother liquor and the precipitant in the reactor (3). The stirring mechanism is used to stir the concentrated mother liquor and the precipitant in the reactor (3). The concentrated mother liquor and the lithium phosphate enter the precipitation tank (6) for precipitation. The drainage mechanism is used to discharge the concentrated mother liquor in the precipitation tank (6).

2. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 1, characterized in that: The separation mechanism comprises a first water pump (111), a discharge pipe (112), a guide pipe (113), a tank body (114), a discharge pipe (115), a second discharge pipe (116), a second valve (117), a circular box (118), a straight pipe (1110), a conical baffle (1111), a curved pipe (1112), a drainage box (1114), a support frame (1115), a second water pump (1116), a suction pipe (1117), a first water outlet pipe (1118), a second water outlet pipe (1119), a first hard pipe (1120), a solenoid valve (1121), a first hose (1122), a first float box (1123) and a first float plate (1125). The first water pump (111) is installed on the top of the mounting frame (5). The bottom of the reactor (3) is connected to a discharge pipe (112), which is connected to the water inlet of the first water pump (111), and the water outlet of the first water pump (111) is connected to a guide pipe (113). The top of the mounting frame (5) is connected to a tank body (114), and the guide pipe (113) is sealed and passes through the tank body (114). The bottom of the tank body (114) is connected to a discharge pipe (115), and the discharge pipe (115) is connected to a second discharge pipe (116). The lower end of the first discharge pipe (7) is connected to the top of the second discharge pipe (116), and a second valve (117) is installed on the second discharge pipe (116). The top of the tank body (114) is connected to a circular box (118), and a drainage hole (119) is opened on the top of the circular box (118). The shaped box (118) is connected to a straight pipe (1110), the guide pipe (113) is connected to the straight pipe (1110), the first water pump (111) is used to suck the concentrated mother liquor and lithium phosphate in the reactor (3) into the tank body (114), the lithium phosphate is initially precipitated in the tank body (114) to separate the concentrated mother liquor and lithium phosphate, and the concentrated mother liquor and small particles of lithium phosphate will overflow through the drainage hole (119), the lower end of the straight pipe (1110) is connected to a conical baffle (1111), the straight pipe (1110) is connected to a curved pipe (1112), the curved pipe (1112) is provided with a filter hole (1113), the curved pipe (1112) is connected to a drainage box (1114), and the drainage box (1114) is connected to the inner wall of the tank body (114). The top of the mounting frame (5) is connected to a support frame (1115), and a second water pump (1116) is installed on the top of the support frame (1115). A suction pipe (1117) is connected to the tank body (114), and the suction pipe (1117) is connected to the water inlet end of the second water pump (1116). The water outlet end of the second water pump (1116) is connected to a first water outlet pipe (1118), and the first water outlet pipe (1118) is connected to a second water outlet pipe (1119). The second water outlet pipe (1119) is sealed and passes through the sedimentation tank (6). The second water pump (1116) is used to suck the concentrated mother liquor and small particles of lithium phosphate into the sedimentation tank (6), and the small particles of lithium phosphate are precipitated in the sedimentation tank (6). The suction pipe (1117) is connected to a first hard pipe (1120).A solenoid valve (1121) is installed on the first hard tube (1120). A first hose (1122) is connected to the first hard tube (1120). The first hose (1122) extends into the tank body (114) through the drainage hole (119). The first hose (1122) is connected to a first float box (1123). The first float box (1123) has a first suction hole (1124). The top of the first float box (1123) is connected to a first floating plate (1125).

3. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 2, characterized in that: The heating mechanism comprises a liquid inlet pipe (121), a liquid outlet pipe (122), a heating pipe (123) and a support plate (124); the top of the parcel box (2) is connected to the liquid inlet pipe (121); the bottom of the parcel box (2) is connected to the liquid outlet pipe (122); the heating pipe (123) is installed in the parcel box (2); and the support plate (124) is connected in the parcel box (2).

4. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 3, characterized in that: The stirring mechanism comprises a stirring motor (131) and a stirring paddle (132). The stirring motor (131) is installed on the top of the reactor (3). The top of the reactor (3) is rotatably connected to the stirring paddle (132). The output shaft of the stirring motor (131) is connected to the stirring paddle (132).

5. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 4, characterized in that: The drainage mechanism comprises a first drainage pipe (141), a second hard pipe (142), a second hose (143), a second float box (144) and a second float plate (146). The sedimentation box (6) is connected to the first drainage pipe (141), the top of the first drainage pipe (141) is connected to the second hard pipe (142), the second hard pipe (142) passes through the annular plate (9), the second hard pipe (142) is connected to the second hose (143), the second hose (143) is located in the sedimentation box (6), the second hose (143) is connected to the second float box (144), the second float box (144) is provided with a second suction hole (145), and the top of the second float box (144) is connected to the second float plate (146).

6. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 5, characterized in that: The invention also includes a blocking mechanism, which includes a blocking net (151), an outer gear ring (152), a scraper (153), a rotating shaft (154), a gear (155) and a servo motor (156). The blocking net (151) is connected inside the annular plate (9). The bottom of the annular plate (9) is rotatably connected to the outer gear ring (152). The outer gear ring (152) is connected to the scraper (153). The top of the scraper (153) contacts the bottom of the blocking net (151). The annular plate (9) is rotatably connected to the rotating shaft (154). The rotating shaft (154) is connected to the gear (155). The gear (155) and the outer gear ring (152) are meshed. The servo motor (156) is installed in the sedimentation box (6). The output shaft of the servo motor (156) is connected to the rotating shaft (154).

7. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 6, characterized in that: The invention also includes an acceleration mechanism, which includes a mounting pipe (161), a vertical pipe (162), a conical contact plate (163), a third water pump (164), a through pipe (165), a conical silica gel plate (167), a conical bucket (168), a fourth water pump (169), a conical head (1610) and a second drainage pipe (1612). The retaining net (151) is connected to the mounting pipe (161), the lower end of the mounting pipe (161) is connected to the vertical pipe (162), the second water outlet pipe (1119) is connected to the vertical pipe (162), the lower end of the vertical pipe (162) is connected to the conical contact plate (163), the third water pump (164) is installed in the mounting pipe (161), the water inlet end of the third water pump (164) is connected to the through pipe (165), the through pipe (165) penetrates the lower end of the mounting pipe (161) and the vertical pipe ( 162), a third suction hole (166) is opened at the lower part of the penetration tube (165), a conical silica gel plate (167) is connected to the lower part of the penetration tube (165), the conical silica gel plate (167) is in contact with the inner wall of the conical contact plate (163), the water outlet end of the third water pump (164) is connected to a conical bucket (168), a fourth water pump (169) is installed in the installation tube (161), the water outlet end of the fourth water pump (169) penetrates the upper end of the installation tube (161), the water inlet end of the fourth water pump (169) is connected to a conical head (1610), the conical head (1610) is located in the conical bucket (168), and a fine hole (1611) is opened at the bottom of the conical head (1610), the water outlet end of the fourth water pump (169) is connected to a second drain pipe (1612), and a discharge port (1613) is opened at the lower part of the installation tube (161).

8. A lithium phosphate precipitation device for recovering concentrated mother liquor according to claim 7, characterized in that: The invention also includes an anti-blocking mechanism, which includes an air pump (171), an air pipe (172), an air box (173) and a one-way air outlet head (174). The air pump (171) is installed on the sedimentation box (6). The air outlet end of the air pump (171) is connected to the air pipe (172). The air pipe (172) seals and penetrates the sedimentation box (6). The air pipe (172) is connected to the air box (173). The top of the air box (173) is connected to the one-way air outlet head (174). The one-way air outlet head (174) surrounds the through-tube (165).

Images