CN207119173U - Subsider mud layer automatic control system - Google Patents

Abstract

It the utility model is related to a kind of subsider mud layer automatic control system, including subsider, detection means, agitating device, motor, underflow Pulp pump and controller, there is agitating device in subsider, subsider has feed pipe, discharge barrel, discharge nozzle is connected with discharge barrel, underflow Pulp pump and valve are installed on discharge nozzle；Subsider is provided with detection means, and detection means includes fly rod, floating drum and detector, and fly rod can drive floating drum and detector to move up and down in the slurry；The controller is connected by signal wire with detection means, motor, underflow Pulp pump；The utility model production capacity simple in construction, easy to operate, can effectively improving subsider and the concentration situation of each slurry band of detection simultaneously automatically adjust underflow Pulp pump conveying capacity, achievable unattended, reduce labor strength, safe and efficient, energy-saving.

Description

Subsider mud layer automatic control system

Technical field

Alumina producing processing technique field is the utility model is related to, is settled in more particularly to a kind of aluminum oxide production process Groove mud layer automatic control system.

Background technology

It is molten through high temperature using Bayer process and the production technology of combination method, aluminum oxide ore in technical field of alumina production Ore pulp after going out is made up of sodium aluminate solution and red mud, dissolved mineral slurry is separated using subsider, supplied materials is pressed with flocculant Certain proportion mixes, and is directly entered under gravity into feeding cylinder, mixed slurry by bottom is radial to barrel Concentrate the top of sedimentary；Solids in pulp part settles rapidly under gravity, liquid then slurry deadweight pressure under to Upper flowing, the overflow of clarification is formed, is discharged by overflow launder；Isolated solution is sent to subsequent handling production aluminum oxide, separation Solid slag afterwards send stockyard to store up after the alkali and aluminium in the multiple back flush recovery attached liquid of subsider；At present, oxygen both domestic and external Change in aluminium Bayer process production process, the process of pulp liquid-solid isolation is realized using subsider.

With the continuous improvement of aluminum oxide production capacity, it is desirable to material in subsider quick and stable by more and more important, And the bottleneck for improving subsider high-efficiency operation is exactly the more difficult detection control of separation of the red mud in acid sodium solution；Therefore, On-line checking control is carried out to the concentration situation of each mud layer of subsider in running and the density of mud layer by the utility model System, gets information about situation of change of the red mud in subsider, passes through offer for realize the big liquid measure high efficiency smooth of subsider Strong guarantee.

The mud of separation in the process of running, is sent to a subsider by subsider using underflow Pulp pump control mud layer Active ingredient in washing recovery attached liquid again, interior agitating device, the compression situation of mud layer be mainly manually sampled through Density is chemically examined to adjust the size of the conveying of underflow, whole process is comparatively laborious, is not easy to regulation and control, it is necessary to which manpower carries out inspection behaviour Make, take time and effort.

Utility model content

The utility model is the above-mentioned problem of solution, there is provided a kind of subsider mud layer automatic control system, it is solved Certainly the technical scheme of technical problem is：

Subsider mud layer automatic control system, including subsider, detection means, agitating device, motor, underflow Pulp pump and Controller, there is agitating device in the subsider, top is provided with motor, and motor can drive agitating device to rotate, subsider top Be communicated with feed pipe, bottom is connected with discharge barrel, and discharge nozzle is connected with discharge barrel, be provided with discharge nozzle underflow Pulp pump and Valve, there is slurry in subsider；Subsider is provided with detection means, and detection means includes fly rod, floating drum and detector, and fly rod passes through At the top of subsider, it can move up and down in the slurry, floating drum is fixed on fly rod bottom, and floating drum minimum point is provided with detector；It is described Controller is connected by signal wire with detection means, motor, underflow Pulp pump.

Preferably, the slurry liquid level in the subsider is H, point three slurry bands, is followed successively by concentration from down to up Band, subsiding belt and stillness of night band.

Preferably, the concentration band is mud layer height h2, subsiding belt and stillness of night band, highly and to measure height h1, detection Device moves up and down in the range of measurement height h1.

Preferably, the agitating device includes agitating shaft, scraper plate and puddler, agitating shaft top and motor connection, stirring Bar is fixedly connected with agitating shaft bottom, and scraper plate is fixed on puddler to be in contact with subsider cell wall and discharge barrel barrel.

Preferably, the discharge nozzle includes discharge nozzle A and discharge nozzle B, and underflow Pulp pump is arranged on discharge nozzle A and discharge nozzle Between B, valve is mounted on discharge nozzle A and discharge nozzle B.

Preferably, the valve is shurry pump.

Preferably, the controller includes touch-screen, DCS control systems, intelligent programmable controller and data processor.

Preferably, the detector is high-precision sensor.

The utility model has the advantages that：

The utility model subsider mud layer automatic control system, the system architecture are simple and convenient to operate, can effectively carried The production capacity of high subsider and the concentration situation of each slurry band of detection simultaneously automatically adjust underflow Pulp pump conveying capacity, realize unmanned behaviour Make, reach reduction labor strength, it is safe and efficient, energy-saving.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

In figure：1. subsider, 11. concentration bands, 12. subsiding belts, 13. stillness of night bands, 14. feed pipes, 15. discharge barrels, 16. go out Expects pipe A, 17. valves, 18. discharge nozzle B, 2. detection means, 21. fly rods, 22. floating drums, 23. detectors, 3. agitating devices, 31. Agitating shaft, 32. scraper plates, 33. puddlers, 4. motors, 5. underflow Pulp pumps, 6. controllers.

h1：Measurement height, h2：Mud layer height, H：Liquid level, h2=H-h1.

Embodiment

Below in conjunction with accompanying drawing of the present utility model, the technical solution of the utility model is clearly and completely described.

Subsider mud layer automatic control system, including subsider 1, detection means 2, agitating device 3, motor 4, underflow slurry Pump 5 and controller 6, there is agitating device 3 in the subsider 1, top is provided with motor 4, and motor 4 can drive agitating device 3 to rotate, The top of subsider 1 is communicated with feed pipe 14, and bottom is connected with discharge barrel 15, is connected with discharge nozzle on discharge barrel 15, on discharge nozzle Underflow Pulp pump 5 and valve 17 are installed, have slurry in subsider 1；Subsider 1 is provided with detection means 2, and detection means 2 includes Fly rod 21, floating drum 22 and detector 23, fly rod 21 can move up and down, floating drum 22 is fixed in the slurry through the top of subsider 1 The bottom of fly rod 21, the minimum point of floating drum 22 are provided with detector 23；The controller 6 by signal wire and detection means 2, motor 4, Underflow Pulp pump 5 connects.

Preferably, the slurry liquid level in the subsider 1 is H, point three slurry bands, is followed successively by concentration from down to up Band 11, subsiding belt 12 and stillness of night band 13.

Preferably, the concentration band 11 is mud layer height h2, subsiding belt 12 and the height of stillness of night band 13 and is measurement height h1, Detection means 2 moves up and down in the range of measurement height h1.

Preferably, the agitating device 3 includes agitating shaft 31, scraper plate 32 and puddler 33, the top of agitating shaft 31 and motor 4 Connection, puddler 33 are fixedly connected with the bottom of agitating shaft 31, and scraper plate 32 is fixed on puddler 33 and the cell wall of subsider 1 and discharging 15 barrels of cylinder are in contact.

Preferably, the discharge nozzle includes discharge nozzle A16 and discharge nozzle B18, underflow Pulp pump 5 be arranged on discharge nozzle A and Between discharge nozzle B, valve 17 is mounted on discharge nozzle A16 and discharge nozzle B18.

Preferably, the valve 17 is slurry valve.

Preferably, the controller 6 includes touch-screen, DCS control systems, intelligent programmable controller and data processing Device.

Preferably, the detector 23 is high-precision sensor.

The subsider of the utility model all normalized forms suitable for alumina producing, detected and settled by detection means Metrical information is integrated into production control system by the density of groove mud layer, with underflow Pulp pump flow, mud layer height h2, stirring moment of torsion Formed chain, the size of the conveying capacity of subsider underflow Pulp pump 5 is automatically controlled by DCS control systems, it is not necessary to manual operation.

The subsider continuously to work, slurry liquid face height can be greatly classified into three bands along groove：Clear liquid band, sedimentation Band, concentration band, the detector 23 of detection means pass through three decanting zones successively during being traveled at the uniform speed above and below automated periodic During the band of domain, because its density is different with viscosity, the power suffered by detector 23 will necessarily change, and its knots modification passes through high-precision Degree sensor is passed in data processor, and computer determines height, floating drum according to the stress of detector 23 and the position of floating drum 22 During 22 entrance mud layer, suffered knots modification of making a concerted effort is maximum.

The utility model is further described with reference to the accompanying drawings and examples.

Embodiment one, as shown in figure 1, subsider mud layer detection means in measurement process, stress trend is sent to control The computer of system carries out processing and draws mud layer height h2, after metrical information is integrated into production control system, with underflow slurry The flow of pump 5 forms chain, setting mud layer height h2, underflow Pulp pump frequency dependence parameter, and underflow Pulp pump passes through DCS controls and is System automatically controls the size of subsider underflow Pulp pump conveying capacity, can convey pump frequency according to the highly automated regulation and control underflow of mud layer, Mud layer rises the rise of underflow Pulp pump frequency and increases conveying capacity, and mud layer declines underflow Pulp pump reduces frequency automatically, reduces conveying Amount, it is not necessary to manual operation, improve automaticity, reduce manual labor.

More liquid can be calculated in measurement process in embodiment two, subsider mud layer detection means of the present utility model The density of layer, after the density information of measurement is integrated into production control system, formed with underflow Pulp pump chain, set mud layer close Degree, underflow Pulp pump frequency dependence parameter, underflow Pulp pump automatically control the big of subsider underflow density by DCS control systems The size of small adjust automatically conveying capacity, when mud layer density is high, the rise of underflow Pulp pump frequency increases conveying capacity, when mud layer density is low Then underflow Pulp pump reduces frequency automatically reduces conveying capacity, and this mode can set related ginseng according to the demand of production technology index Number；The present invention effectively reduces the cost of production run, serves energy-saving, meets the requirement of normal production run, Present invention red- mud settlement and separation process suitable for process for making alumina, and simple in construction, convenient operation, beneficial to implementation.

Embodiment three, detection means draw mud layer height, can enter in production control system information integration, be stirred with subsider Mix device moment of torsion and formed chain, mud layer rises then agitating device moment of torsion and raised, and this mode can grasp more liquid in subsider at any time The variation tendency of layer, is adjusted in time, avoids, because moment of torsion is increased to that rake machine stop jumping occurs to a certain degree, causing subsider to collapse groove Accident, is influenceed to produce, and heavy losses are caused to enterprise；Mud layer height can also be separately drawn using detection means, by information integration Enter in production control system, formed with flocculant delivery pump it is chain, according to the variation tendency adjust automatically flocculant of more liquid layers Addition, greatly reduce production cost；The system architecture is simple, convenient operate disclosure satisfy that wanting for normal production run Ask.

It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses Change or replacement, should all cover within the scope of protection of the utility model.

Claims (8)

1. subsider mud layer automatic control system, including subsider（1）, detection means（2）, agitating device（3）, motor（4）, bottom Flow Pulp pump（5）And controller（6）, the subsider（1）Inside there is agitating device（3）, top is provided with motor（4）, motor（4）Can Drive agitating device（3）Rotate, subsider（1）Top is communicated with feed pipe（14）, bottom is connected with discharge barrel（15）, discharge barrel （15）On be connected with discharge nozzle, underflow Pulp pump is installed on discharge nozzle（5）And valve（17）, subsider（1）Inside there is slurry；Its It is characterised by, subsider（1）Provided with detection means（2）, detection means（2）Including fly rod（21）, floating drum（22）And detector （23）, fly rod（21）Through subsider（1）Top, it can move up and down in the slurry, floating drum（22）It is fixed on fly rod（21）Bottom, Floating drum（22）Minimum point is provided with detector（23）；The controller（6）Pass through signal wire and detection means（2）, motor（4）、 Underflow Pulp pump（5）Connection.

2. the subsider mud layer automatic control system according to claim 1, it is characterised in that：The subsider（1）It is interior Slurry liquid level be H, point three slurry bands are followed successively by concentration band from down to up（11）, subsiding belt（12）With clear liquid band （13）.

3. the subsider mud layer automatic control system according to claim 2, it is characterised in that：The concentration band（11）For Mud layer height h2, subsiding belt（12）With clear liquid band（13）Highly and to measure height h1, detection means（2）In measurement height h1 models Moved up and down in enclosing.

4. the subsider mud layer automatic control system according to claim 1, it is characterised in that：The agitating device（3）Bag Include agitating shaft（31）, scraper plate（32）And puddler（33）, agitating shaft（31）Top and motor（4）Connection, puddler（33）With stirring Mix axle（31）Bottom is fixedly connected, scraper plate（32）It is fixed on puddler（33）It is upper respectively with subsider（1）Cell wall and discharge barrel (15) barrel is in contact.

5. the subsider mud layer automatic control system according to claim 1, it is characterised in that：The discharge nozzle includes Expects pipe A（16）With discharge nozzle B（18）, underflow Pulp pump（5）Installed in discharge nozzle A（16）With discharge nozzle B（18）Between, discharge nozzle A（16）With discharge nozzle B（18）On be mounted on valve（17）.

6. the subsider mud layer automatic control system according to claim 5, it is characterised in that：The valve（17）For material Starch valve.

7. the subsider mud layer automatic control system according to claim 1, it is characterised in that：The controller（6）Bag Include touch-screen, DCS control systems, intelligent programmable controller and data processor.

8. the subsider mud layer automatic control system according to claim 1, it is characterised in that：The detector（23）For High-precision sensor.