阅读说明：本技术 一种u型离子交换塔智能化控制系统及方法 (Intelligent control system and method for U-shaped ion exchange tower ) 是由 程威 侯江 邱君君 侯录 原渊 李绍海 于 2020-04-24 设计创作，主要内容包括：一种U型离子交换塔智能化控制系统,通过PLC总控在满足条件时通过电控泵和自控开关控制溶液和树脂进出U型塔；通过铀传感器实时监测铀富集段位置并反馈PLC,控制高浓度铀合格液和贫树脂产量,实现U型塔周期性自动操作和智能化控制。(An intelligent control system of a U-shaped ion exchange tower controls solution and resin to enter and exit the U-shaped tower through an electric control pump and an automatic control switch when the conditions are met through PLC master control; the uranium enrichment section position is monitored in real time through the uranium sensor and the PLC is fed back, the yield of high-concentration uranium qualified liquid and lean resin is controlled, and the periodical automatic operation and intelligent control of the U-shaped tower are realized.)

1. The utility model provides a U type ion exchange tower intelligent control system which characterized in that: the device comprises a resin elevated tank (6), wherein an overflow port electric control valve (1) is arranged on the upper portion of the left side of the resin elevated tank (6), an emptying electric control valve (2), a liquid level meter (3), a resin inlet pneumatic electric control valve (4) and a compressed air inlet electric control valve (5) are arranged at the top of the resin elevated tank (6), the lower portion of the resin elevated tank (6) is connected with a U-shaped tower body (11), a tail liquid outlet electric control valve (7) is arranged on the upper portion of the right side of the U-shaped tower body (11), a uranium qualified liquid outlet electric control valve (9) and a uranium sensor (10) are arranged at the bottom of the U-shaped tower body (11), a resin outlet pneumatic electric control valve (12) is arranged on the upper portion of the left side of the U-shaped tower body (11), and the top of the left side of;

an overflow port electric control valve (1), an emptying electric control valve, a pressure gauge (2), a liquid level meter (3), a resin inlet pneumatic electric control valve (4), a compressed air inlet electric control valve (5), a tail liquid outlet electric control valve (7), a uranium qualified liquid outlet electric control valve (9), a uranium sensor (10), a resin outlet pneumatic electric control valve (12), a liquid inlet electromagnetic metering pump (13) and a liquid inlet electric control valve (14) are all connected with a master control (8).

2. A method for applying the intelligent control system of the U-shaped ion exchange column of claim 1, wherein: the method comprises the following steps:

s1: the resin head tank (6) and the U-shaped tower body (11) are filled with primary saturated resin, the capacity is C1mgU/mLWR, the liquid level meter (3) monitors the resin volume V1m3 in the resin head tank (6) and feeds back a master control 8;

s2: the master controller (8) controls the liquid inlet electromagnetic metering pump (13) to start the eluent, and the master controller (8) controls the liquid inlet electric control valve (14) and the tail liquid outlet electric control valve (7) to open;

s3: the tail liquid outlet electric control valve 7 is controlled to be closed through the master controller (8), the uranium qualified liquid outlet electric control valve (9) is opened to discharge qualified liquid, the average concentration of the qualified liquid is C2g/L, the liquid discharge volume is V2m3, the uranium sensor (10) continuously monitors the uranium content in the tower C3g/L before the qualified liquid is discharged, and the master controller (8) is fed back;

s4, when the C3g/L is lower than 30g/L, controlling the liquid inlet electromagnetic metering pump (13) and the electrically controlled valve (9) of the qualified uranium liquid outlet to be closed;

s5: obtaining the volume Vm3 of the resin to be moved by the calculation formula

V＝C2V2/C1

S6: a compressed air inlet electric control valve (5), a resin inlet pneumatic electric control valve (4) and a resin outlet pneumatic electric control valve (12) are opened to push primary saturated resin to enter the tower and lean resin to exit the tower, and a liquid level meter (3) monitors a liquid level reading V3m3 in a resin head tank (6) in real time;

s7: comparing V3 with (V1-V), when V3 > V1-V, continuing with step S6; when the condition that V3 is less than or equal to V1-V is monitored, the compressed air inlet electric control valve (5), the resin inlet pneumatic electric control valve (4) and the resin outlet pneumatic electric control valve (12) are controlled to be closed, and the emptying electric control valve (2) is controlled to be opened and emptied.

3. The intelligent control method of the U-shaped ion exchange tower according to claim 2, characterized in that: further comprising S8: and repeating the steps from S2 to S7 to realize the continuous operation of the U-shaped tower.

4. The intelligent control method of the U-shaped ion exchange tower according to claim 2, characterized in that: in S2, the flow rate is adjusted to aL/h.

5. The intelligent control method of the U-shaped ion exchange tower according to claim 3, characterized in that: in the step S2, the liquid feeding time is kept at T1 h.

6. The intelligent control method of the U-shaped ion exchange tower according to claim 2, characterized in that: and in the S3, the tail liquid outlet electric control valve (7) is controlled to be closed through the master control (8).

7. The intelligent control method of the U-shaped ion exchange tower according to claim 2, characterized in that: in S5, the total control (8) calculates to obtain the resin volume Vm3 to be moved.

8. The intelligent control method of the U-shaped ion exchange tower as claimed in claim 2, wherein: in the S6, the master controller (8) controls the compressed air inlet electric control valve (5), the resin inlet pneumatic electric control valve (4) and the resin outlet pneumatic electric control valve (12) to be opened.

9. The intelligent control method of the U-shaped ion exchange tower as claimed in claim 2, wherein: in the S7, the master controller (8) continuously compares V3 with (V1-V).

10. The intelligent control method of the U-shaped ion exchange tower as claimed in claim 2, wherein: in the S4, the total control (8) judges that C3g/L is lower than 30 g/L.

Technical Field

The invention belongs to the technical field of uranium ore in-situ leaching, and particularly relates to an intelligent control system and method for a U-shaped ion exchange tower.

Background

When the U-shaped tower is adopted to exchange target anions, resin is pushed to enter and exit the U-shaped tower from the high-level storage tank through gravity or compressed air and moves in the U-shaped tower, and meanwhile, corresponding lean resin is produced; and the liquid phase is driven to enter the tower through a liquid inlet pump, moves in the tower in the reverse direction with the resin phase and carries out ion exchange, and meanwhile, uranium enrichment liquid and tail liquid are produced.

In the process, the resin enters and exits the tower, the solution enters and exits the tower, the speed and the volume of the resin and the solution are controlled frequently, manual operation is carried out by adopting a common valve and a liquid inlet pump, operation is required to be carried out at different positions and heights of the U-shaped tower according to a certain flow and a certain switching sequence, the operation is frequent, and the repeated labor consumption and the misoperation risk without technical content are increased. Meanwhile, as the ion capacity of the tower entering resin changes, the technological parameters need to be adjusted in time, namely certain adaptability to the tower entering resin is needed.

Objects and summary of the invention

The invention aims to: controlling the solution and the resin to enter and exit the U-shaped tower through an electric control pump and an automatic control switch when the conditions are met through the PLC master control; the uranium enrichment section position is monitored in real time through the uranium sensor and the PLC is fed back, the yield of high-concentration uranium qualified liquid and lean resin is controlled, and the periodical automatic operation and intelligent control of the U-shaped tower are realized.

The intelligent control method of the U-shaped ion exchange tower adopts the technical scheme that: an intelligent control system of a U-shaped ion exchange tower comprises a resin head tank, wherein the upper part of the left side of the resin head tank is provided with an overflow port electric control valve, the top of the resin head tank is provided with an evacuation electric control valve, a liquid level meter, a resin inlet pneumatic electric control valve and a compressed air inlet electric control valve, the lower part of the resin head tank is connected with a U-shaped tower body, the upper part of the right side of the U-shaped tower body is provided with a tail liquid outlet electric control valve, the bottom of the U-shaped tower body is provided with a uranium qualified liquid outlet electric control valve and a uranium sensor, the upper part of the left side of the U-shaped tower body is provided with a resin outlet pneumatic electric control valve, and the top of the left side of the U-;

an overflow port electric control valve, an emptying electric control valve, a pressure gauge, a liquid level meter, a resin inlet pneumatic electric control valve, a compressed air inlet electric control valve, a tail liquid outlet electric control valve, a uranium qualified liquid outlet electric control valve, a uranium sensor, a resin outlet pneumatic electric control valve, a liquid inlet electromagnetic metering pump and a liquid inlet electric control valve are all connected with a master control.

An intelligent control method for a U-shaped ion exchange tower comprises the following steps:

s1: the resin head tank and the U-shaped tower body are filled with primary saturated resin, the capacity is C1mgU/mLWR, the liquid level meter monitors the volume V1m3 of the resin in the resin head tank and feeds back the master control;

s2: the master controller controls the liquid inlet electromagnetic metering pump to start the eluent, and the master controller 8 controls the liquid inlet electric control valve and the tail liquid outlet electric control valve 7 to open;

s3: the tail liquid outlet electric control valve 7 is controlled to be closed through the master control, the uranium qualified liquid outlet electric control valve is opened to discharge qualified liquid, the average concentration of the qualified liquid is C2g/L, the liquid discharge volume is V2m3, the uranium sensor continuously monitors the uranium content in the tower before the qualified liquid is discharged, and C3g/L is fed back to the master control;

s4, when the C3g/L is lower than 30g/L, controlling the liquid inlet electromagnetic metering pump and the electric control valve of the qualified uranium liquid outlet to be closed;

s5: obtaining the volume Vm3 of the resin to be moved by the calculation formula

V＝C2V2/C1

S6: a compressed air inlet electric control valve 5, a resin inlet pneumatic electric control valve 4 and a resin outlet pneumatic electric control valve are opened to push primary saturated resin to enter the tower and lean resin to exit the tower, and a liquid level meter monitors the liquid level reading V3m3 in a resin head tank in real time;

s7: comparing V3 with (V1-V), when V3 > V1-V, continuing with step S6; when the condition that V3 is less than or equal to V1-V is monitored, the compressed air inlet electric control valve 5, the resin inlet pneumatic electric control valve and the resin outlet pneumatic electric control valve are controlled to be closed, and the evacuation electric control valve is controlled to be opened and evacuated.

Further comprising S8: and repeating the steps from S2 to S7 to realize the continuous operation of the U-shaped tower.

In S2, the flow rate is adjusted to aL/h.

In the step S2, the liquid feeding time is kept at T1 h.

And in the S3, the tail liquid outlet electric control valve is controlled to be closed through the master control.

In the step S5, the total control calculation is carried out to obtain the resin volume Vm3 needing to be moved.

And in the step S6, the control compressed air inlet electric control valve, the resin inlet pneumatic electric control valve and the resin outlet pneumatic electric control valve are opened.

In the S7, the general control continuously compares V3 with (V1-V).

In the S4, the total control judges that C3g/L is lower than 30 g/L.

The intelligent control system and method for the U-shaped ion exchange tower are characterized in that:

1) the repeated labor consumption and misoperation risk of low technical content are reduced;

2) the adaptability of the U-shaped tower ion exchange technology to the capacity change of saturated resin is enhanced;

3) the automation and intelligence degree of the in-situ leaching uranium mine are improved.

Drawings

FIG. 1 is a schematic diagram of an intelligent control point location and control structure of a U-shaped ion exchange tower;

in the figure: an overflow port electric control valve 1, an emptying electric control valve and a pressure gauge 2, a liquid level meter 3, a resin inlet pneumatic electric control valve 4, a compressed air inlet electric control valve 5, a resin elevated tank 6, a tail liquid outlet electric control valve 7, a master control 8, a uranium qualified liquid outlet electric control valve 9, a uranium sensor 10, a U-shaped tower body 11, a resin outlet pneumatic electric control valve 12, a liquid inlet electromagnetic metering pump 13 and a liquid inlet electric control valve 14.

Detailed Description

The utility model provides a U type ion exchange tower intelligent control system, including resin elevated tank 6, 6 left side upper portions in resin elevated tank are overflow mouth electric control valve 1, 6 tops in resin elevated tank have evacuation electric control valve 2, level gauge 3, the pneumatic electric control valve of resin import 4 and compressed air import electric control valve 5, 6 sub-unit connection U type tower bodies 11 in resin elevated tank, 11 right side upper portions in U type tower bodies have tail liquid export electric control valve 7, 11 bottoms in U type tower bodies have qualified liquid export electric control valve 9 of uranium, uranium sensor 10, 11 left side upper portions in U type tower bodies have the pneumatic electric control valve of resin export 12, 11 left side tops in U type tower bodies are passed through inlet electric control valve 14 and are connected with feed liquor electromagnetism measuring pump 13.

An overflow port electric control valve 1, an emptying electric control valve, a pressure gauge 2, a liquid level meter 3, a resin inlet pneumatic electric control valve 4, a compressed air inlet electric control valve 5, a tail liquid outlet electric control valve 7, a uranium qualified liquid outlet electric control valve 9, a uranium sensor 10, a resin outlet pneumatic electric control valve 12, a liquid inlet electromagnetic metering pump 13 and a liquid inlet electric control valve 14 are all connected with a master control 8.

An intelligent control method for a U-shaped ion exchange tower comprises the following steps:

s1: the resin head tank 6 and the U-shaped tower body 11 are filled with primary saturated resin with the capacity of C₁mgU/mLWR, level meter 3 monitors the volume V of resin in resin head tank 6₁m³And feeds back the total control 8 to the central control,

s2: the master control 8 controls the liquid inlet electromagnetic metering pump 13 to start the eluent, the flow is adjusted to aL/h, the master control 8 controls the liquid inlet electric control valve 14 and the tail liquid outlet electric control valve 7 to be opened, and the liquid inlet time T lasts₁h。

S3: the tail liquid outlet electric control valve 7 is controlled to be closed through the master control 8, the qualified uranium liquid outlet electric control valve 9 is opened to discharge qualified uranium liquid, and the average concentration of the qualified uranium liquid is C₂g/L, volume of effluent V₂m³And the uranium sensor 10 continuously monitors the uranium content C in the tower before the qualified liquid is discharged₃g/L, feeding back a master controller 8;

s4 general control 8 judgment C₃When the g/L is lower than 30g/L, controlling the liquid inlet electromagnetic metering pump 13 and the electric control valve 9 of the qualified uranium liquid outlet to be closed;

s5: calculating by the master control 8 to obtain the volume Vm of the resin to be moved³The calculation formula is

V＝C₂V₂/C₁

S6: the master control 8 controls the opening of the compressed air inlet electric control valve 5, the resin inlet pneumatic electric control valve 4 and the resin outlet pneumatic electric control valve 12 to push the primary saturated resin to enter the tower, the lean resin to exit the tower, and the liquid level meter 3 monitors the liquid level reading V in the resin head tank 6 in real time₃m³。

S7: master control 8 continuous comparison V₃And (V)₁-V) when V₃＞V₁V, continue to step S6; when V is monitored₃≤V₁And V, controlling the compressed air inlet electric control valve 5, the resin inlet pneumatic electric control valve 4 and the resin outlet pneumatic electric control valve 12 to be closed, and controlling the emptying electric control valve 2 to be opened and emptied.

And repeating the steps from S2 to S7 to realize the continuous operation of the U-shaped tower.