Metatitanic acid feeding system for titanium-doped iron phosphate production

Abstract

The utility model relates to a metatitanic acid feeding system for titanium-doped iron phosphate production, which is characterized in that a metatitanic acid ton barrel is arranged on a support, an outlet at the lower part of the metatitanic acid ton barrel is provided with a manual valve, the manual valve is connected with a movable hose, the movable hose is connected into a transfer barrel, a first discharge pipe at the bottom of the transfer barrel is connected with an inlet of a transfer pump, and a second discharge pipe at the bottom of the transfer pump is connected with a second discharge pipe. An outlet of the transfer pump is connected into a metatitanic acid storage barrel through a first feeding pipe, a second discharging pipe at the bottom of the metatitanic acid storage barrel is connected with an inlet of a feeding pump, an outlet of the feeding pump is connected with a second feeding pipe, the second feeding pipe is connected with a plurality of feeding branch pipes, and the feeding branch pipes are connected into the corresponding reaction kettles respectively. Design is simple and reasonable, and operation is convenient. The metatitanic acid adding device can accurately control the adding amount and the adding speed of metatitanic acid, achieves full-automatic control in the metatitanic acid adding process, is safe and stable, improves the production efficiency, and reduces the labor intensity of post personnel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the production technology equipment field of iron phosphate, specifically relates to a metatitanic acid feeding system for titanium-doped iron phosphate production. BACKGROUND

[0002] With the continuous development of new energy industry, lithium iron phosphate batteries are increasingly widely used in electric vehicles, energy storage systems and other fields. Lithium iron phosphate positive electrode material is a layered structure, and a large number of lithium ions in it will diffuse and migrate during charging and discharging, which can easily cause the destruction of the layered structure. The addition of titanium dioxide can form a protective layer to prevent the destruction of the positive electrode material structure and improve the stability of the structure. Because titanium dioxide has good electronic conductivity, it can enhance the electrochemical performance of lithium iron phosphate, thereby improving the capacity and cycle life of the battery. In the production process of lithium iron phosphate, titanium dioxide is mainly used as an additive. By mixing it with lithium iron phosphate raw materials, the conductivity and stability of the material can be effectively improved.

[0003] In the prior art production, metatitanic acid is manually added by using an electric hoist to lift a 1-ton metatitanic acid barrel on site, then pouring the metatitanic acid into a container, and then weighing and adding it into the reaction container. Because the acidity of metatitanic acid is high, it is easy to splash into the eyes, and the use of a hoist also has safety hazards, resulting in low production efficiency. SUMMARY

[0004] The utility model aims at avoiding the defects of the prior art and providing a metatitanic acid feeding system for titanium-doped iron phosphate production, thereby effectively solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model takes the technical scheme: a metatitanic acid feeding system for titanium-doped iron phosphate production, comprising a metatitanic acid ton barrel and a transfer barrel, characterized in that: the metatitanic acid ton barrel is arranged on a support, a manual valve is arranged at the outlet of the lower part of the metatitanic acid ton barrel, a movable hose is connected to the manual valve, the movable hose is connected to the transfer barrel, the first discharge pipe at the bottom of the transfer barrel is connected to the inlet of a transfer pump, the outlet of the transfer pump is connected to the first feeding pipe of a metatitanic acid storage barrel, the second discharge pipe at the bottom of the metatitanic acid storage barrel is connected to the inlet of a feeding pump, the outlet of the feeding pump is connected to a second feeding pipe, a plurality of feeding branch pipes are connected to the second feeding pipe, and the plurality of feeding branch pipes are respectively connected to corresponding reaction kettles.

[0006] A circulation pipe is further connected to the metatitanic acid storage barrel, the circulation pipe is connected to the second discharge pipe through a three-way valve and a circulation pump; when the reaction kettle is not feeding, the circulation is started to prevent the material from depositing for a long time at the bottom of the metatitanic acid where it cannot be stirred.

[0007] The first discharge pipe is provided with a first control valve, the first feed pipe is provided with a second control valve, the second discharge pipe is provided with a third control valve, the second feed pipe is provided with a fourth control valve, and the feed branch pipe is provided with a branch pipe control valve.

[0008] Further, the panel of the bracket is downwardly inclined to ensure that all the liquid in the metatitanic acid ton barrel placed thereon flows by itself, and the lowest end of the panel is vertically provided with a baffle for preventing the metatitanic acid ton barrel from sliding.

[0009] Further, the bottom of the transfer barrel is in the shape of an elliptical cone to prevent the deposition of the material at the bottom, and the transfer barrel is provided with a stirrer for preventing the stratification of metatitanic acid.

[0010] Further, the transfer barrel is provided with a liquid level meter, the liquid level meter is interlocked with the first control valve, the second control valve and the transfer pump to start and stop, and when the transfer tank is filled to the designed liquid level, the interlock automatically opens the first control valve, the second control valve and the transfer pump.

[0011] Further, the bottom of the metatitanic acid storage barrel is in the shape of a cone, the metatitanic acid storage barrel is provided with a double-blade stirrer, and the metatitanic acid storage barrel is provided with a liquid level meter; the liquid level meter is interlocked with the transfer pump, the circulating pump, the feed pump, the second control valve and the third control valve to control; when the liquid level of the metatitanic acid storage barrel reaches the designed upper limit alarm liquid level, the transfer pump and the second control valve are closed to prevent the tank from overflowing; when the liquid level of the metatitanic acid storage barrel reaches the designed lower limit alarm liquid level, the circulating pump, the feed pump and the third control valve are closed to prevent the pump from being burned out under no load.

[0012] Further, the reaction kettle is provided with a liquid level meter, the liquid level meter is interlocked with the fourth control valve, the branch pipe control valve and the feed pump to control; when the liquid level of the reaction kettle reaches the designed protection liquid level, the fourth control valve, the branch pipe control valve and the feed pump are forcibly closed to prevent the reaction kettle from overflowing.

[0013] Further, the second feed pipe and the feed branch pipe are both provided with cumulative flow meters for accurately measuring the amount of metatitanic acid added to each reaction kettle.

[0014] Further, the transfer barrel is provided with a pure water pipe for cleaning the transfer barrel; the reaction kettle is provided with a pure water pipe for adjusting the concentration of the reaction material in the reaction kettle; the second discharge pipe is connected with a pure water pipe through a tee joint for periodically flushing the second discharge pipe and the circulating pipe to prevent the deposition and caking of metatitanic acid material.

[0015] Further, the pure water pipe of the transfer barrel is connected with a pure water branch pipe through a tee joint, and the other end of the pure water branch pipe is connected with the first discharge pipe through a tee joint for periodically flushing the first discharge pipe to prevent the deposition and caking of metatitanic acid material.

[0016] The utility model discloses a beneficial effect is: simple and reasonable in design, convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the schematic diagram of the utility model;

[0018] 1 - support, 2 - metatitanic acid ton barrel, 3 - baffle, 4 - transfer barrel, 5 - transfer pump, 6 - metatitanic acid storage barrel, 7 - circulating pump, 8 - feed pump, 9 - reaction kettle;

[0019] La - movable hose, L1 - first discharge pipe, L2 - second discharge pipe, L3 - circulating pipe, J1 - first feed pipe, J2 - second feed pipe, Jn - feed branch pipe, S - pure water pipe, S1 - pure water branch pipe;Fa - manual valve, F1 - one control valve, F2 - two control valves, F3 - three control valves, F4 - four control valves, Fn - branch pipe control valve. DETAILED DESCRIPTION

[0020] See Figure 1 A metatitanic acid feeding system for titanium-doped iron phosphate production, comprising metatitanic acid ton barrel 2 and transfer barrel 4, characterized in that: the metatitanic acid ton barrel 2 is arranged on the support 1, the outlet of the lower part of the metatitanic acid ton barrel 2 is provided with a manual valve Fa, the movable hose La is connected to the manual valve Fa, the movable hose La is connected to the transfer barrel 4, the first discharge pipe L1 at the bottom of the transfer barrel 4 is connected to the inlet of the transfer pump 5, the outlet of the transfer pump 5 is connected to the first feed pipe J1 and then connected to the metatitanic acid storage barrel 6, the second discharge pipe L2 at the bottom of the metatitanic acid storage barrel 6 is connected to the inlet of the feed pump 8, the outlet of the feed pump 8 is connected to the second feed pipe J2, a plurality of feed branch pipes Jn are connected to the second feed pipe J2, and the plurality of feed branch pipes J2 are connected to corresponding reaction kettles 9 respectively;

[0021] The metatitanic acid storage barrel 6 is also connected to the circulating pipe L3, and the circulating pipe L3 is connected to the second discharge pipe L2 through a three-way valve and a circulating pump 7;When the reaction kettle 9 is not fed, the circulating pump 7 is started to prevent the material from depositing for a long time in the place where the bottom of the metatitanic acid cannot be stirred;

[0022] The first discharge pipe L1 is provided with a one control valve F1, the first feed pipe J1 is provided with a two control valve F2, the second discharge pipe L2 is provided with a three control valve F3, the second feed pipe J2 is provided with a four control valve F4, and the feed branch pipe Jn is provided with a branch pipe control valve Fn.

[0023] The panel of the support 1 is downwardly inclined to ensure that all the liquid in the metatitanic acid ton barrel 2 flows by itself, and the lowest end of the panel is vertically provided with a baffle 3 to prevent the metatitanic acid ton barrel 2 from sliding.

[0024] The bottom of the transfer barrel 4 is in the shape of an elliptical cone to prevent the bottom material from depositing, and the transfer barrel 4 is provided with a stirrer to prevent the metatitanic acid from being stratified.

[0025] The transfer barrel 4 is provided with a liquid level meter, and the liquid level meter is interlocked with a first control valve F1, a second control valve F2 and a transfer pump 5 to start and stop. When the transfer tank 4 is filled to the designed liquid level, the interlock automatically opens the first control valve F1, the second control valve F2 and the transfer pump 5.

[0026] The bottom of the metatitanic acid storage barrel 6 is in the shape of a cone, the metatitanic acid storage barrel 6 is provided with a double-blade stirrer, and the metatitanic acid storage barrel 6 is provided with a liquid level meter; the liquid level meter is interlocked with the transfer pump 5, a circulating pump 7, a feed pump 8, the second control valve F2 and a third control valve F3 to control. When the liquid level of the metatitanic acid storage barrel 6 reaches the designed upper limit alarm liquid level, the transfer pump 5 and the second control valve F2 are closed to prevent the tank from overflowing; when the liquid level of the metatitanic acid storage barrel 6 reaches the designed lower limit alarm liquid level, the circulating pump 7, the feed pump 8 and the third control valve F3 are closed to prevent the pump from being burned out under no load.

[0027] The reaction kettle 9 is provided with a liquid level meter, and the liquid level meter is interlocked with a fourth control valve F4, a branch control valve Fn and a feed pump 8 to control. When the liquid level of the reaction kettle 9 reaches the designed protection liquid level, the fourth control valve F4, the branch control valve Fn and the feed pump 8 are forcibly closed to prevent the reaction kettle 9 from overflowing.

[0028] The second feed pipe J2 and the feed branch pipe Jn are both provided with an accumulated flow meter to accurately measure the amount of metatitanic acid added to each reaction kettle 9.

[0029] The transfer barrel 4 is provided with a pure water pipe S for cleaning the transfer barrel 4; the reaction kettle 9 is provided with a pure water pipe S for adjusting the concentration of the reaction material in the reaction kettle 9; the second discharge pipe L2 is connected with the pure water pipe S through a tee joint, which is used to periodically flush the second discharge pipe L2 and the circulating pipe L3 to prevent the metatitanic acid material from depositing and caking.

[0030] The pure water pipe S of the transfer barrel 4 is connected with a pure water branch pipe S1 through a tee joint, and the other end of the pure water branch pipe S1 is connected with the first discharge pipe L1 through a tee joint to periodically flush the first discharge pipe L1 to prevent the metatitanic acid material from depositing and caking.

[0031] The addition of metatitanic acid in each reactor 9 is controlled. When the reactor 9 needs to add metatitanic acid, the cumulative flow meter on the feed branch Jn is cleared, the cumulative flow meter is started, the circulating pump 7 is stopped, the branch control valve Fn, the fourth control valve F4, and the third control valve F3 are opened, the feed pump 8 is started, and when the cumulative value of the cumulative flow meter on the feed branch Jn reaches the set addition amount, the branch control valve Fn is closed. The branch control valve Fn is forced interlocked with the feed pump 8, and when all the corresponding branch control valves Fn of the reactor 9 are closed, the feed pump 8 is forced to stop, so that the reactor 9 is prevented from starting the feed pump 8 to blow up the second feed pipe J2 and damage the pump.

Claims

1. A metatitanic acid feeding system for titanium-doped ferrophosphorus production, comprising a metatitanic acid ton barrel (2), a transfer barrel (4), characterized in that: The metatitanic acid ton barrel (2) is arranged on the support (1), the outlet of the lower part of the metatitanic acid ton barrel (2) is provided with a hand valve (Fa), the hand valve (Fa) is connected with a movable hose (La), the movable hose (La) is connected into a transfer barrel (4), the first discharge pipe (L1) at the bottom of the transfer barrel (4) is connected with the inlet of a transfer pump (5), the outlet of the transfer pump (5) is connected with the first feed pipe (J1) and connected into a metatitanic acid storage barrel (6), the second discharge pipe (L2) at the bottom of the metatitanic acid storage barrel (6) is connected with the inlet of a feed pump (8), the outlet of the feed pump (8) is connected with the second feed pipe (J2), a plurality of feed branch pipes (Jn) are connected with the second feed pipe (J2), and the plurality of feed branch pipes (Jn) are connected into corresponding reaction kettles (9) respectively. The metatitanic acid storage barrel (6) is further connected with a circulating pipe (L3), the circulating pipe (L3) is connected with the second discharge pipe (L2) through a three-way pipe and a circulating pump (7); the first discharge pipe (L1) is provided with a first control valve (F1), the first feed pipe (J1) is provided with a second control valve (F2), the second discharge pipe (L2) is provided with a third control valve (F3), the second feed pipe (J2) is provided with a fourth control valve (F4), and the feed branch pipe (Jn) is provided with a branch pipe control valve (Fn).

2. A metatitanic acid feeding system for titanium-doped ferrophosphate production according to claim 1, characterized in that: The panel of the support (1) is downwardly inclined to ensure that all the liquid in the metatitanic acid ton barrel (2) flows by itself, and the lowest end of the panel is vertically provided with a baffle (3) for preventing the metatitanic acid ton barrel (2) from sliding.

3. A metatitanic acid feeding system for titanium-doped ferrophosphate production according to claim 1, characterized in that: The bottom of the transfer barrel (4) is in the shape of an elliptical cone to prevent the deposition of the material at the bottom, and the transfer barrel (4) is provided with a stirrer for preventing the stratification of metatitanic acid.

4. A metatitanic acid feeding system for titanium-doped ferrophosphate production according to claim 1, characterized in that: The transfer barrel (4) is provided with a liquid level meter, the liquid level meter is interlocked with the first control valve (F1), the second control valve (F2) and the transfer pump (5) to start and stop, and when the transfer barrel (4) is filled to the designed liquid level, the first control valve (F1), the second control valve (F2) and the transfer pump (5) are automatically opened.

5. A metatitanic acid feeding system for titanium-doped ferrophosphate production as claimed in claim 1, characterized in that: The bottom of the metatitanic acid storage barrel (6) is in the shape of a cone, the metatitanic acid storage barrel (6) is provided with a double-blade stirrer, and the metatitanic acid storage barrel (6) is provided with a liquid level meter; the liquid level meter is interlocked with the transfer pump (5), the circulating pump (7), the feed pump (8), the second control valve (F2) and the third control valve (F3) to control; when the liquid level of the metatitanic acid storage barrel (6) reaches the designed upper limit alarm liquid level, the transfer pump (5) and the second control valve (F2) are closed to prevent the overflow of the metatitanic acid storage barrel (6); when the liquid level of the metatitanic acid storage barrel (6) reaches the designed lower limit alarm liquid level, the circulating pump (7), the feed pump (8) and the third control valve (F3) are closed to prevent the burnout of the pumps due to the empty load.

6. A metatitanic acid feeding system for titanium-doped ferrophosphate production as claimed in claim 1, characterized in that: The reaction kettle (9) is provided with a liquid level meter, the liquid level meter is interlocked with the fourth control valve (F4), the branch pipe control valve (Fn) and the feed pump (8) to control; when the liquid level of the reaction kettle (9) reaches the designed protection liquid level, the fourth control valve (F4), the branch pipe control valve (Fn) and the feed pump (8) are forcibly closed to prevent the overflow of the reaction kettle (9).

7. A metatitanic acid feeding system for titanium-doped ferrophosphate production as claimed in claim 1, characterized in that: The second feed pipe (J2) and the feed branch pipe (Jn) are respectively provided with cumulative flow meters for accurately measuring the amount of metatitanic acid added into each reaction kettle (9).

8. A metatitanic acid feeding system for titanium-doped ferrophosphate production as claimed in claim 1, characterized in that: The transfer barrel (4) is provided with a pure water pipe (S) for cleaning the transfer barrel (4); the reaction kettle (9) is provided with a pure water pipe (S) for adjusting the concentration of the reaction material in the reaction kettle (9); and the second discharge pipe (L2) is connected with the pure water pipe (S) through a tee pipe, for periodically flushing the second discharge pipe (L2) and the circulating pipe (L3), so as to prevent the metatitanic acid material from depositing and caking.

9. A metatitanic acid feeding system for titanium-doped ferrophosphate production according to claim 8, characterized in that: The pure water pipe (S) of the transfer barrel (4) is connected with a pure water branch pipe (S1) through a tee pipe, and the other end of the pure water branch pipe (S1) is connected with the first discharge pipe (L1) through a tee pipe, so as to periodically flush the first discharge pipe (L1) and prevent the metatitanic acid material from depositing and caking.

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