A thickener control system

Abstract

This application discloses a compactor control system, including a compactor, a slurry injection unit and a controller, the top and bottom of the compactor have a pulp injection channel and a pulp discharge outlet; the pulp injection unit includes a flocculant delivery pump, a first buffer tank and a first valve, the flocculant delivery pump is connected to the thickener, the first valve is connected between the slurry injection channel and the first buffer tank. In this application, by connecting to the first buffer tank on the slurry injection channel of the thickening machine and storing the injected slurry in the frequency of the flocculant delivery pump, controlling the opening and operation of the first valve opening and closing, the flocculant injection amount cannot meet the balance demand of the slurry flow and density

Description

[0001] Description

[0002] A THICKENER CONTROL SYSTEM

[0003] FILED OF THE DISCLOSURE

[0004] This application relates to the technical field of laterite nickel slurry, and speci fically relates to a thickener control system .

[0005] BACKGROUND

[0006] In the hydrometallurgy process of laterite nickel ore , the thickening machine is an important equipment , which mainly makes the solid particles suspended in the liquid gradually settle to the bottom of the container through the action of gravity settlement , and improves the solid concentration in the pulp or other suspension . In order to change the dense machine in stable operation, the Chinese patent CN209612286U provides a dense machine control system, the dense machine control system including dense machine , the flocculant pump connected with the dense machine , the first controller, flow pump, and the second controller, through dynamic adj ustment of the operation frequency of flocculant pump and flow pump, to control the stable operation of the thickening machine .

[0007] For the above existing technology, there are also the following problems : the operating frequency of the flocculant conveying pump and the bottom flow pump, etc . When the maximum frequency of the flocculant conveying pump and the bottom flow pump can not meet the balance requirements of the working condition, the thickening ef fect of the thickmachine is still unstable .

[0008] SUMMARY

[0009] The purpose of this application is to overcome the above technical deficiencies and propose a dense machine control system to solve the technical problem that the thickening machine is still unstable when the adj ustable maximum frequency of the flocculant conveying pump and the bottom flow pump cannot meet the balance requirements of the working conditions . To achieve the above technical obj ectives , this application adopts the following technical solutions :

[0010] This application provides a dense machine control system, comprising :

[0011] Concentrshy machine , its top and bottom respectively have pulp inj ection channel and pulp outlet ;

[0012] A slurry inj ection portion including a flocculant delivery pump, a first buf fer tank and a first valve , the flocculant delivery pump connected to the thickener, the first valve connected between the slurry inj ection channel and the first buf fer tank; and

[0013] Controller, the flocculant delivery pump and the first valve are electrically connected to the controller for selecting the first valve based on the slurry flow and density of the thickener and the real-time operating frequency of the flocculant delivery pump .

[0014] In some embodiments , a pulp discharge portion comprises a pumping assembly and a retarded component both connected and connected with the pulp discharge outlet , the draining assembly for pumping pulp and the retarded assembly for holding pulp .

[0015] In some embodiments , the relief assembly includes a second buf fer tank, a pumping pump and a second valve , one end of the second valve is connected to the slurry outlet and the other end is connected to the pumping pump and the other end of the pumping pump is connected to the second buf fer tank .

[0016] In some embodiments , the drain assembly comprises a bottom flow pump and a third valve which is connected to the pulp discharge outlet through the third valve .

[0017] In some embodiments , the third valve is a three-way valve and the three ends of the three-way valve are connected to the second buf fer tank, the bottom flow pump and the pulp discharge outlet for switching the bottom flow pump to the second buf fer tank and the bottom flow pump to the pulp discharge outlet .

[0018] In some embodiments , the bottom flow pump, pumping pump and second valve are all electrically connected to the controller selected to open or close the second valve and pumping pump based on the bottom pressure value of the thickener and the real-time operating frequency of the bottom flow pump . In some embodiments, the bottom of the first buffer tank is provided with a fourth valve connected to the slurry injection channel .

[0019] In some embodiments, both the first and second buffer tanks are fitted with a liquid level sensor.

[0020] In some embodiments, the outlet end of the bottom flow pump is connected with a pulp outlet channel, the slurry inlet channel and the slurry outlet channel are provided with a flowmeter and a densitometer, and the thickener is provided with a pressure transmitter .

[0021] In some embodiments, the flocculant delivery pump is duct connected with a flocculant storage tank.

[0022] Compared with the prior art, the thickening machine control system provided in this application is connected to the first buffer tank through the opening and closing of the first valve based on the frequency and the maximum working frequency of the working frequency of the flocculant delivery pump, the flocculant injection amount is unable to meet the balance demand of the slurry flow and density.

[0023] BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic diagram of the dense machine control system provided by the embodiment of the present application;

[0025] FIG. 2 is a control block diagram of the dense machine control system provided in the embodiment of the present application.

[0026] Note of the attached drawings:

[0027] 1, thickening machine; 101, pulp injection channel; 102, pulp outlet; 103, pulp outlet; 2, pulp injection; 21, flocculant delivery pump; 22, first buffer tank; 23, first valve; 24, fourth valve; 25, flocculant tank; pulp discharge; 31, drainage components; 11, third valve; 32, pump; 321, second buffer tank; 322, pump; controller sensor; 401, liquid level sensor; 402; 403, density meter; 404. Pressure transmitter.

[0028] DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0029] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further explained in detail in combination with the drawings and embodiments . It should be understood that the speci fic embodiments described herein are used only to interpret the application and not to define the application .

[0030] In order to solve , in the flocculant pump and bottom flow pump adj ustable maximum frequency can not meet the demand of working balance , dense machine still has technical problems of unstable concentration ef fect , this application provides a dense machine control system, can reali ze the flocculant pump and bottom flow pump adj ustable maximum frequency cannot meet the demand of working condition balance , maintain the stability of the dense machine .

[0031] It should be noted that the thickening machine control system described in this application is used for but not limited to the concentration of laterite nickel pulp, for the convenience of explanation, the principle of the thickening machine control system applied to other types of equipment in this application is essentially the same as that used in other pulp concentration, which is not described here .

[0032] Please see Figures 1 and 2 , FIG . 1 is a schematic diagram of the structure of the dense machine control system in one embodiment of the present application, The compactor control system includes the compactor 1 , the slurry inj ection unit 2 , and the controller 4 , The top and bottom of the thickener 1 have a pulp inj ection passage 101 and a pulp discharge outlet 102 , respectively; The slurry inj ection portion 2 includes a flocculant delivery pump 21 , a first buf fer tank 22 and a first valve 23 , The flocculant delivery pump 21 is connected to the thickener 1 , The other end of the flocculant delivery pump 21 is connected with a flocculant tank 25 , For the delivery of the flocculant , The first valve 23 is connected between the slurry inj ection channel 101 and the first buf fer tank 22 , With the first valve 23 open, Can divert the slurry of the slurry inj ection channel 101 , Diit to the first buf fer tank

[0033] 22 for storage ; The flocculant delivery pump 21 and the first valve

[0034] 23 are both electrically connected to the controller 4 , The controller 4 for selecting the opening or closing of the first valve 23 based on the slurry flow and density of the thickener 1 and the real-time operating frequency of the flocculant delivery pump 21 , among, With a frequency converter on the flocculant delivery pump 21 , To adj ust the frequency of its operation, When the slurry flow rate and density in the slurry inj ection channel 101 fluctuate , corresponding, The controller 4 controls the operating frequency of the flocculant delivery pump 21 to adj ust , When the slurry flow and density value exceed its maximum working frequency, Open the first valve 23 , For the diversion of the mineral slurry, Thus balancing the ore material flow rate and density values of the slurry inj ection channel 101 , Matched the operating frequency of the flocculant delivery pump 21 .

[0035] It is understandable that in the control of the controller 4 , a corresponding threshold is set for the ore flow and density value of the slurry inj ection channel 101 , which corresponds to the flocculant conveying flow corresponding to the maximum working frequency of the flocculant conveying pump 21 . I f the conveying flow cannot be balanced with the ratio of the slurry, the first valve 23 is opened to achieve the stable working state of the thickening machine 1 .

[0036] It is understandable that the controller 4 can be a programmable logic controller ( PLC ) to generate the corresponding electrical signal by collecting the working parameters of the concentrator and the flocculant conveying pump ( such as the pulp flow, density, the working frequency of the flocculant conveying pump of the dense machine ) , transmit it to the digital quantity input card of the programmable logic controller, and output the corresponding digital quantity signal to the first valve to control the first valve .

[0037] In one of these examples , Please see Figure 1 , In order to balance the balance of the pressure value of the dense pulp accumulated at the bottom of the thickening machine 1 and the balance of the pulp discharge at the pulp discharge part 3 , The present application also includes a mine pulp discharge unit 3 , The slurry discharge portion 3 includes a discharge assembly 31 and a relief assembly 32 , The discharge assembly 31 and the release assembly 32 are connected and connected with the pulp outlet 102 , The discharging assembly 31 is used for discharging pulp, The bulk assembly 32 is used for loading the slurry, Drainage assembly 31 for the normal discharge of the pulp, When the pressure value caused by the accumulation of dense slurry inside the thickener 1 is too high, And exceeds the maximum load frequency of the extraction assembly 31 , Then the load assembly 32 is enabled to divert part of the slurry, To balance the amount of dense pulp inside the thicket 1 and the displacement of the pulp .

[0038] Further, the drain assembly 31 comprises a bottom flow pump 311 and a third valve 312 which is connected to the slurry discharge outlet 102 , draining the pulp at the bottom of the thickener 1 by opening the third valve 312 and starting the bottom flow pump 311 .

[0039] Further, the relief assembly 32 includes a second buf fer tank 321 , a pumping pump 322 , and a second valve 323 , one end of the second valve 323 connected to the pulp discharge outlet 102 , the other end to the pumping pump 322 , the other end of the pumping pump 322 connected to the second buf fer tank 321 , by opening the second valve 323 to divert the bottom slurry and temporarily present in the second buf fer tank 321 .

[0040] In one of these examples , Please see Figure 1 , In order to perform slurry extraction within the second buf fer tank 321 within a controlled range , The third valve 312 is a three-way valve , The three ends of the three-way valve are respectively connected to the second buf fer tank 321 , the bottom flow pump 311 , and the slurry discharge outlet 102 , For switching the bottom flow pump 311 in communication with the second buf fer tank 321 , Or the bottom flow pump 311 is connected with the pulp discharge outlet 102 , When the bottom flow pump 311 is connected with the slurry discharge outlet 102 , The bottom flow pump 311 performs the normal operation of pulp extraction, When the bottom flow pump 311 is connected with the second buf fer tank 321 , The bottom flow pump 311 is used to drain the pulp slurry in the second buf fer tank 321 .

[0041] It is understandable that when the pulp pressure value is within a controlled range , the pulp pumping in the thickening machine 1 can be suspended, and the pulp in the second buf fer tank 321 can be drained to empty, and the pumping pump 322 can also use a positive and negative pump body with a connecting pipe to the inlet channel at the inlet end, and a valve can be set up to pump the pulp by backpumping .

[0042] In one embodiment , refer to FIG . 1 , in order to discharge the pulp in the first buf fer tank 22 , the bottom of the first buf fer tank 22 is provided with the fourth valve 24 connected to the slurry inj ection channel 101 . When the pulp is inj ected within the frequency controllable range of the flocculant delivery pump 21 , the fourth valve 24 can be opened to inj ect the pulp in the first buf fer tank 22 into the thickening machine 1 .

[0043] In one embodiment , refer to FIG . 1 , the first buf fer tank 22 and the second buf fer tank 321 are equipped with a liquid level sensor 401 , the discharge end of the bottom flow pump 311 is connected with a pulp discharge channel 103 , the slurry inj ection channel 101 and the slurry discharge channel 103 are provided with a flowmeter 402 and the density meter 403 , the pressure transmitter 404 , the flow meter 402 detects the flow value of the collecting pulp, the density meter 403 detects the density value of the collecting pulp, and the pressure transmitter 404 detects the pressure value at the bottom of the collecting machine 1 .

[0044] In this present embodiment , Please see Figure Figure 2 , The bottom flow pump 311 , the pumping pump 322 , and the second valve 323 are all electrically connected to the controller 4 , The controller 4 is used to select to open or close the second valve 323 and the pumping pump 322 according to the bottom pressure value of the thickener 1 and the real-time operating frequency of the bottom flow pump 311 , among, The liquid level sensor 401 , the flowmeter 402 , and the density meter 403 are also electrically connected to the controller 4 , The controller 4 uses a programmable logic controller, According to the slurry condition of the slurry inj ection channel 101 detected by the flowmeter 402 and the density meter 403 , To control the operating frequency of the flocculant delivery pump 21 ; Controlling the operating frequency of the bottom flow pump 311 according to the pressure value of the pressure transmitter 404 ; Control the opening of the first valve 23 according to the operating frequency of the flocculant delivery pump 21 ; Opening of the second valve 323 and the pumping pump 322 are controlled according to the pressure value of the pressure transmitter 404 .

[0045] In order to better understand the present application, the technical scheme of this application is described in detail with FIGS . 1 to FIG . 2 : the first valve , the second valve and the fourth valve are all in the normally closed state , while the third valve is in the open state , connecting the dense machine 1 and the bottom flow pump 311 . When the mineral slurry is inj ected, Beyond the controllable range of the flocculant delivery pump 21 , That is , beyond the corresponding set threshold of the slurry flow rate and density of the inj ection thickener and the maximum operating frequency of the flocculant delivery pump 21 , Open the first valve 23 for diversion, Store the ore slurry into the first buf fer tank 22 ; When the mineral pulp is discharged, Beyond the controllable range of the bottom flow pump 311 , That is , exceeding the threshold of the bottom pressure value of the corresponding machine 1 and the maximum operating frequency of the bottom flow pump 311 , Open the second valve 323 and the pumping pump 322 , Diting and storage to the second buf fer tank 321 ; When the flocculant delivery pump 21 is within a controlled range , When the first buf fer tank 22 is also detected by the internal liquid level sensor 401 , Open the fourth valve 24 , Following the inj ected pulp is discharged and inj ected into the thickener 1 , When the mineral pulp discharge is finished, Close the fourth valve again; When the bottom flow pump 311 is within a controllable range of a more relaxed amplitude , When the second buf fer tank 321 is also detected by the internal liquid level sensor 401 , Then switch the access of the third valve 312 , Connect it to the second buf fer tank 321 , To drain the pulp inside it , After the drawing row, Then switch to the original pathway .

[0046] The speci fic embodiment of the present application described above does not constitute a limitation of the scope of protection of this application . Any other corresponding changes and deformation made in accordance with the technical conception of the application shall be covered within the protection of the claims of the application .

Claims

WHAT IS CLAIMED IS1 . A compmachine control system characteri zed by :Concentrshy machine , its top and bottom respectively have pulp inj ection channel and pulp outlet ;A slurry inj ection portion including a flocculant delivery pump, a first buf fer tank and a first valve , the flocculant delivery pump connected to the thickener, the first valve connected between the slurry inj ection channel and the first buf fer tank; andController, the flocculant delivery pump and the first valve are electrically connected to the controller for selecting the first valve based on the slurry flow and density of the thickener and the real-time operating frequency of the flocculant delivery pump .2 . The thickmachine control system according to claim 1 , further comprising a pulp discharge assembly, and a relief component , the discharging assembly and the relief component connected and connected to the pulp discharge outlet , the discharging assembly for the discharging pulp discharge , and the release assembly for the pulp loading .3 . The compactor control system according to claim 2 , wherein the relief assembly comprises a second buf fer tank, a pumping pump and a second valve , one end of the second valve is connected to the pulp discharge outlet and the other end is connected to the pumping pump and the other end of the pumping pump is connected to the second buf fer tank .4 . The compactor control system according to claim 3 , wherein the drain assembly comprises a bottom flow pump and a third valve which is connected to the pulp discharge outlet through the third valve .5 . The compactor control system according to claim 4 , wherein the third valve is a three-way valve and the three ends of the three- way valve are connected to the second buf fer tank, the bottom flow pump and the pulp discharge outlet for switching the communication state of the bottom flow pump and the second buffer tank and the bottom flow pump to the pulp discharge outlet .6 . The thickener control system of claim 5 , wherein the bottom flow pump, the pumping pump and the second valve are all electrically connected to the controller used to open or close the second valve and the pumping pump according to the bottom pressure value of the thickener and the real-time operating frequency of the bottom flow pump .7 . The compactor control system according to claim 6 , wherein the bottom of the first buf fer tank is provided with a fourth valve connected to the slurry inj ection channel .8 . The thickener control system according to claim 7 , wherein both the first and second buf fer tanks are fitted with liquid level sensors .9 . The thickener control system according to claim 8 , wherein the discharge end of the bottom flow pump is connected with a pulp discharge channel , the slurry inj ection channel and the pulp discharge channel are provided with a flow meter and a density meter, and the thickener is provided with a pressure transmitter .10 . The compactor control system according to claim 9 , wherein the flocculant delivery pump is connected to a flocculant tank .

Images