CN202543284U

CN202543284U - Automatic control system for rare earth precipitation process

Info

Publication number: CN202543284U
Application number: CN2012200682543U
Authority: CN
Inventors: 卢建翔; 刘元林; 阴长福
Original assignee: Fujian Changting Jinlong Rare Earth Co Ltd
Current assignee: Fujian Changting Jinlong Rare Earth Co Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-11-21
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses an automatic control system for a rare earth precipitation process, which comprises a reaction vessel 1, a reaction vessel 2, a feed liquid storage tank, a precipitator storage tank, a programmable logic controller (PLC) and a host computer; the saline water and steam enter the reaction vessel 1 and the reaction vessel 2 through a delivery pipeline, and a vortex shedding flowmeter and a pneumatic control valve are arranged on the delivery pipeline; the feed liquid storage tank and the precipitator storage tank are connected with the reaction vessel 1 and the reaction vessel 2 through the delivery pipeline, and an electromagnetic flowmeter and a magnetic pump are arranged on the delivery pipeline; the reaction vessel 1 and the reaction vessel 2 are also respectively provided with a stirring motor, an ultrasonic level gauge, a floating ball liquid level switch and an online acidometer; and the ultrasonic level gauges, the floating ball liquid level switches, the online acidometers, the stirring motors, the electromagnetic flowmeter, the pneumatic control valve, a pneumatic valve, the magnetic pump and the vortex shedding flowmeter are respectively connected with the PLC, and the PLC is connected with the host computer. The automatic control system is simple to operate and accurately controls during the rare earth precipitation process.

Description

A kind of rare-earth precipitation process automation system

Technical field

The utility model relates to a kind of rare-earth precipitation process automation system, mainly applies to the process control of rare-earth precipitation operation.

Background technology

In the prior art, as shown in Figure 1, the rare-earth precipitation program control system generally comprises, reactor 10, No. two reactors 20, liquid tank 30 and precipitation agent storage tanks 40; No salt solution and steam get into a reactor 10 and No. two reactors 20 through transport pipe respectively, and respectively are provided with stopping valve (101,201,102,202) on the transport pipe; Liquid tank 30 and precipitation agent storage tank 40 are connected with a reactor 10 and No. two reactors 20 through transport pipe respectively; Respectively be provided with the magnetic drive pump (301,401) that feed liquid and precipitation agent is pumped to a reactor 10 and No. two reactors 20 on the transport pipe, also respectively be provided with glass rotameter (302,402) and stopping valve (103,203,104,204) on the transport pipe; Also respectively be provided with agitator motor (105,205) on a reactor 10 and No. two reactors 20; Liquid tank 30 and precipitation agent storage tank 40 also respectively are provided with liquidometer (303,403).

The rare-earth precipitation program control system of prior art has following defective:

The first, in the rare-earth precipitation technological process, measure the temperature in the reactor in the artificial use temperature meter insertion reaction pot, and come controlled temperature through manual regulation steam stopping valve aperture.Yet; Along with increasing of reduction of feed volume, in the reactor liquid level along with variation, and disalignment to also difference to some extent of acidity value; And in the prior art middle-weight rare earths precipitation process; The controlling acidity value is as judgement criteria, along with the feed liquid surface elevation changes constantly adjustment thermometer measure position, troublesome poeration and inaccurate with the acidity value about the 20cm of liquid level below.

The second, the flow velocity that feed liquid and precipitation agent get into reactor uses glass rotameter to show, artificial adjustment manual ball valve aperture when needing the adjustment flow, the inaccurate and troublesome poeration of its flow control.

The 3rd, in the precipitin reaction process, constantly measure reactor acidity value monitoring reaction process with the pH test paper, its troublesome poeration and control accuracy are poor.

Therefore, in the prior art, whole rare-earth precipitation process, its key process parameter control all is to control through artificial experience; Troublesome poeration, control accuracy is poor, and controls and improperly be prone to cause product to be precipitated as mashed prod, and product particle is little; Viscosity is big, is difficult to filter, and is difficult to clean the chlorine root, burns situation such as yield is low; Cause enterprises production efficiency low, product stability is poor, serious waste of resources.

In view of many defectives of prior art middle-weight rare earths precipitation process system, the inventor develops a kind of rare-earth precipitation process automation system that overcomes above-mentioned defective, and this case produces thus.

The utility model content

The purpose of the utility model is to provide a kind of rare-earth precipitation process automation system of simple to operate and precise control.

For reaching above-mentioned purpose, the solution of the utility model is:

A kind of rare-earth precipitation program control system comprises a reactor, No. two reactors, liquid tank, precipitation agent storage tank, PLC and upper computers, is provided with pneumavalve between a reactor and No. two reactors;

No salt solution gets into a reactor and No. two reactors through transport pipe, and transport pipe is provided with vortex shedding flow meter, at a reactor and No. two reactor input terminuss the moving valve of water inlet ball is set also;

Steam gets into a reactor and No. two reactors through transport pipe, at a reactor and No. two reactor input terminuss the pneumatic membrane variable valve is set also;

The sidewall of a reactor and No. two reactors also respectively is provided with hot resistance;

Liquid tank is connected with a reactor and No. two reactors through transport pipe, the magnetic drive pump that transport pipe is provided with magnetic flow meter, pneumatic adjusting valve and feed pump is delivered to a reactor and No. two reactors;

The precipitation agent storage tank is connected with a reactor and No. two reactors through transport pipe, the magnetic drive pump that also is provided with magnetic flow meter, pneumatic adjusting valve on the transport pipe and precipitation agent is pumped to a reactor and No. two reactors;

Also respectively be provided with agitator motor, ultrasonic level gage, floating-ball level switch and online acidometer on a reactor and No. two reactors;

Liquid tank and precipitation agent storage tank also respectively are provided with liquidometer;

Said ultrasonic level gage, floating-ball level switch, online acidometer, agitator motor, magnetic flow meter, pneumatic adjusting valve, pneumavalve, magnetic drive pump and vortex shedding flow meter are connected with PLC respectively, and PLC is connected with upper computer through Ethernet.

Further, online acidometer comprise acidometer probe, pipeline, upper limit snap ring, lower limit snap ring, on locate snap ring, locate snap ring and wire down; The acidometer probe is arranged in the lower end of duct, and two locator card central spacers are arranged on the inner side-wall of reactor, and pipeline is stuck in the two location snap rings; Upper limit snap ring is arranged on the pipeline upper end, is positioned on the snap ring of location; The lower limit snap ring is arranged on the pipeline middle-end, is positioned to locate down under the snap ring; Wire is arranged in the pipeline, and an end is connected with the acidometer probe, and the other end is connected with PLC.

Further, PLC is the omron series product.

After adopting such scheme, the utility model adopts full-automatic flow process control rare-earth precipitation process, has realized control automatically such as rare-earth precipitation process temperature, liquid level, flow, acidity value.The MC of prior art: temperature control precision is 5 ℃, and flow control accuracy is 2%, and the acidity value control accuracy is 0.9, and the deposition product burns yield and in the 20%-38% scope, fluctuates; Adopt this programme after robotization control: temperature control precision is 1 ℃, and flow control accuracy is 0.8%, and the acidity value control accuracy is 0.15, and the deposition product burns yield can be stable at 35-37%; Than manual operation, technology key parameter control accuracy and product stability improve greatly, realize one-touch control and do not need frequently to regulate flow, measure acidity value, have improved the production efficiency of enterprise.

Simultaneously, the utility model adopts upper computer to monitor in real time, by upper computer realize to the technological process data handle, computing, storage, form, warning etc., realize the post unmanned, and make things convenient for the query history production data, be convenient to production management.

Description of drawings

Fig. 1 is a prior art rare-earth precipitation process schema;

Fig. 2 is the utility model rare-earth precipitation process schema;

Fig. 3 is the utility model hardware system structure iron;

Fig. 4 is the utility model rare-earth precipitation process control flow figure;

Fig. 5 is an acidity value measuring apparatus in the utility model reactor.

Label declaration

A reactor 10

Stopping valve (101,102,103,104) agitator motor 105

No. two reactors 20

Stopping valve (201,202,203,204) agitator motor 205

Liquid tank 30

Magnetic drive pump 301 glass rotameters 302

Liquidometer 303

Precipitation agent storage tank 40

Magnetic drive pump 401 glass rotameters 402

Liquidometer 403

The utility model

A reactor 1

Hot resistance 11 pneumatic diaphragm control valves 12

Water inlet pneumatic ball valve 13 advances precipitation agent pneumatic ball valve 14

Feeding liquid pneumatic ball valve 15 agitator motors 16

Vortex shedding flow meter 17

No. two reactors 2

Hot resistance 21 pneumatic diaphragm control valves 22

Water inlet pneumatic ball valve 23 advances precipitation agent pneumatic ball valve 24

Feeding liquid pneumatic ball valve 25 agitator motors 26

Liquid tank 3

Magnetic drive pump 31 floating-ball level switch 32

Ultrasonic level gage 33 magnetic flow meters 34

Pneumatic adjusting ball valve 35

Precipitation agent storage tank 4

Magnetic drive pump 41 floating-ball level switch 42

Ultrasonic level gage 43 magnetic flow meters 44

Pneumatic adjusting ball valve 45

Online acidometer 5

Acidometer 51 pipelines 52 of popping one's head in

53 times location of lower limit snap ring snap ring 54

Upper limit snap ring 55 wires 56

Last location snap ring 57.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done detailed explanation.

Consult Fig. 2 to shown in Figure 5; A kind of rare-earth precipitation program control system that the utility model discloses; Comprise between reactor 1, No. two reactors 2, liquid tank 3, precipitation agent storage tank 4, PLC (programmable logic controller) 6 and 7, numbers reactors 1 of upper computer and No. two reactors 2 and be provided with the pneumavalve (not shown).

No salt solution gets into a reactor 1 and No. two reactors 2 through transport pipe, and transport pipe is provided with vortex shedding flow meter 17, at a reactor 1 and No. two reactor 2 input terminuss the moving valve (13,23) of water inlet ball is set respectively also.

Steam gets into a reactor 1 and No. two reactors 2 through transport pipe, at a reactor 1 and No. two reactor 2 input terminuss pneumatic membrane variable valve (12,22) is set respectively also.

The sidewall of a reactor and No. two reactors also respectively is provided with hot resistance (11,21), and this hot resistance (11,21) can be the Pt100 hot resistance.

Liquid tank 3 is connected with a reactor 1 and No. two reactors 2 through transport pipe, the magnetic drive pump 31 that transport pipe is provided with magnetic flow meter 34, pneumatic adjusting valve 35 and feed pump is delivered to a reactor 1 and No. two reactors 2.

Precipitation agent storage tank 4 is connected with a reactor 1 and No. two reactors 2 through transport pipe, the magnetic drive pump 41 that also is provided with magnetic flow meter 44, pneumatic adjusting valve 45 on the transport pipe and precipitation agent is pumped to a reactor 1 and No. two reactors 2.

Also respectively be provided with agitator motor (16,26), ultrasonic level gage (33,43), floating-ball level switch (32,42) and online acidometer (not shown) on a reactor 1 and No. two reactors 2.

Said ultrasonic level gage (33,43), floating-ball level switch (32,42), online acidometer, agitator motor (16,26), magnetic flow meter (34,44), pneumatic adjusting valve (35,45), pneumavalve, magnetic drive pump (31,41) and vortex shedding flow meter 17 are connected with PLC6 respectively, and PLC6 is connected with upper computer 7 through Ethernet.

Referring to shown in Figure 5, wherein, online acidometer 5 comprise acidometer probe 51, pipeline 52, upper limit snap ring 55, lower limit snap ring 53, on locate snap ring 57, locator card 54 and wire 56 down.

Acidometer probe 51 is arranged in pipeline 52 lower ends; Location snap ring 54 was arranged on the inner side-wall of reactor at interval under last location snap ring 57 reached, and was used for fixing pipeline 52, prevented that it is along with stirring horizontal hunting; This pipeline 52 can be plastic conduit; Pipeline 52 is stuck in the two location snap rings (54,57), leaves a fixed gap between two location snap rings (54,57) and the pipeline 52, and pipeline 52 can be fluctuated along with the height change of feed liquid face; Upper limit snap ring 55 is arranged on pipeline 52 upper ends, is positioned on the snap ring 57 of location; Lower limit snap ring 53 is arranged on pipeline 52 middle-ends, is positioned to locate down under the snap ring 54; Pipeline 52 is fluctuated be limited on the certain position, acidometer probe 51 touches the reactor bottom and breaks when preventing blowing.

Wire 16 is arranged in the pipeline 52, and an end and acidometer probe 51 is connected, and the other end is connected with PLC6, adjusts pipeline 52 buoyancy earlier before at the online acidometer 5 of use, acidometer is popped one's head in 51 be under the liquid level about 20cm.This PLC6 is omron (Omron) series product, and according to different work scene and technology controlling and process requirement, selects the appropriate PLC opertaing device, and the CONTROL PROCESS condition is set.

The utility model rare-earth precipitation program control system, its rare-earth precipitation technical process is following:

At first make end water, start agitator motor and begin to stir, and feed steam, control end water temp toward a certain amount of no salt solution of the interior adding of reactor;

Add after end water and the homo(io)thermism, add feed liquid to set(ting)value, open the precipitation agent charging, regulate flow through magnetic flow meter, control precipitation agent and feed liquid get into reactor with the certain flow rate ratio;

In reaction process, constantly measure acidity value in the reactor through online acidometer, judge the degree of precipitin reaction with acidity value in the reactor; When acidity value during near the technology controlling and process terminal point, stop the feed liquid charging, reduce precipitation agent charging flow velocity simultaneously; Slowly charging, acidity value are reached home after the set(ting)value, stop the precipitation agent charging; Continuation stirring for some time mixes, and opens the baiting valve blowing at last, stops operation.

The utility model in use, rare earth feed liquid storage tank 3 is installed ultrasonic level gage (33,43) on the flange of precipitation agent storage tank 4; Liquid level signal is sent to PLC6; Transmit signal through Ethernet again and give upper computer 7, on upper computer 7 pictures, show liquid level in the storage tank, floating-ball level switch (32,42) is installed in the storage tank side; Switch signal is sent to PLC6, and magnetic drive pump (31,41) forms interlocked control.Vortex shedding flow meter 17 is installed on inlet channel, magnetic flow meter (34,44) is installed on feed pipe, be delivered to PLC6 to flow signal through the flow transmitter (not shown), by PLC6 feedback control flow pneumatic adjusting valve (35,45) aperture.At reactor sidewall flange port Pt100 hot resistance 11 is installed, through the temperature transmitter (not shown) temperature signal is sent to PLC6, by PLC6 feedback control steam pneumatic diaphragm control valve 12 apertures.Pneumavalve is installed on the feed pipe, and pneumavalve start and stop control and operation feedback signal are introduced among the PLC, realizes pneumavalve start and stop and safety interlocking through the PLC program.

Introduce the startup of agitator motor (16,26) and magnetic drive pump (31,41) and operation feedback signal among the PLC6, realize Long-distance Control and supervision.

Wherein, operation field is by the control of PLC and on-the-spot touch-screen, realizes data gathering, upper computer communication, assigns instruction and function such as control on the spot.The sequence of control of PLC and on-the-spot touch-screen can adopt omron CX-Programmer programming software platform to accomplish, and specifically sees shown in Figure 4ly, and its control process is following:

1. initialize routine;

2. select control precipitation process automatically, switch through pneumavalve and select a reactor or No. two reactors to begin operation;

3. differentiate the amount of precipitation agent oxalic acid in amount and the precipitation agent storage tank of feed liquid in the liquid tank through liquidometer,, stop operation if being in low level then reports to the police;

4. set and react the bottom pot water flooding quantity, beginning is water inlet automatically, through the vortex shedding flow meter metering, stops into water when arriving set(ting)value, opens the steam pneumatic adjusting valve simultaneously and imports steam and regulate end water temp;

5. water inlet finishes, and sets feed liquid inlet amount A and B, earlier with high flow rate dosed liquid; When arriving set(ting)value A; The feeding liquid flow adopts variable valve to regulate to transfer low flow velocity to, open the precipitation agent charging simultaneously, through variable valve control precipitation agent charging and feed liquid charging flow velocity in a proportional range;

When 6. arriving feed liquid charging set(ting)value B, stop magnetic drive pump, close pneumavalve, precipitation agent incoming flow prompt drop is low, measures the clarifying kettle acidity value through online acidometer, when acidity arrives set(ting)value, stops magnetic drive pump, closes the precipitation agent pneumavalve;

7. stop to stir after arriving the stirring setting-up time, open blowing pneumavalve blowing.

The embodiment that the above is merely the utility model is not the restriction to this case design, and all equivalent variations of doing according to the design key of this case all fall into the protection domain of this case.

Claims

1. a rare-earth precipitation process automation system is characterized in that: comprise a reactor, No. two reactors, liquid tank, precipitation agent storage tank, PLC and upper computers, be provided with pneumavalve between a reactor and No. two reactors;

2. a kind of rare-earth precipitation process automation system as claimed in claim 1 is characterized in that: online acidometer comprise acidometer probe, pipeline, upper limit snap ring, lower limit snap ring, on locate snap ring, locate snap ring and wire down; The acidometer probe is arranged in the lower end of duct, and two locator card central spacers are arranged on the inner side-wall of reactor, and pipeline is stuck in the two location snap rings; Upper limit snap ring is arranged on the pipeline upper end, is positioned on the snap ring of location; The lower limit snap ring is arranged on the pipeline middle-end, is positioned to locate down under the snap ring; Wire is arranged in the pipeline, and an end is connected with the acidometer probe, and the other end is connected with PLC.

3. a kind of rare-earth precipitation process automation system as claimed in claim 1, it is characterized in that: PLC is the omron series product.