Thickener control system
By connecting a buffer tank and a flow density detection device to the slurry injection channel of the thickener, and combining this with the controller to adjust the valves, the problem of instability in the thickener caused by insufficient frequency of the flocculant delivery pump was solved, thus achieving stable operation and efficient operation of the thickener.
Patent Information
- Application Number
- CN202520160878.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In the hydrometallurgical process of laterite nickel ore, the thickening effect of the thickener is unstable, mainly because the operating frequency of the flocculant delivery pump cannot meet the requirements of the working condition balance.
By connecting a first buffer tank into the slurry injection channel of the thickener, and using a flow and density detection device in conjunction with a controller to control the opening and closing of valves, the slurry is diverted and temporarily stored. The frequency of the flocculant delivery pump is adjusted to match the slurry flow and density, ensuring the stable operation of the thickener.
When the maximum frequency of the flocculant delivery pump cannot meet the demand, the thickener can maintain efficient and stable operation by adaptively adjusting the slurry flow and density to ensure the stability of the thickening effect.
Smart Images
Figure CN223774387U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thickening technology for laterite nickel ore slurry, specifically to a thickener control system. Background Technology
[0002] In the hydrometallurgical process of laterite nickel ore, the thickener is an important piece of equipment. It mainly uses gravity settling to gradually settle solid particles suspended in the liquid to the bottom of the container, thereby increasing the solid concentration in the slurry or other suspensions.
[0003] In order to ensure the continuous and stable operation of the thickener when the operating conditions change, the thickener control system in related technologies generally includes a thickener, a flocculant delivery pump connected to the thickener, a first controller, an underflow pump, and a second controller. The stable operation of the thickener is controlled by dynamically adjusting the operating frequency of the flocculant delivery pump and the underflow pump.
[0004] However, the operating frequency of the flocculant delivery pump has extreme values. When the maximum adjustable frequency of the flocculant delivery pump cannot meet the requirements for balancing the working conditions, the thickener still has unstable thickening effect. Utility Model Content
[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a thickener control system to solve the technical problem that the thickener will have unstable thickening effect when the maximum adjustable frequency of the flocculant delivery pump cannot meet the working condition balance requirements.
[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0007] This utility model provides a thickener control system, including:
[0008] The thickener has a slurry injection channel;
[0009] The slurry injection mechanism includes a flocculant delivery pump, a first buffer tank, and a first valve. The output end of the flocculant delivery pump is connected to the thickener, and the first valve is connected between the slurry injection channel and the first buffer tank.
[0010] A slurry injection flow meter is used to detect the slurry injection flow rate of the thickener;
[0011] A slurry injection density meter is used to detect the slurry injection density of the thickener;
[0012] The controller is communicatively connected to the flocculant delivery pump, the first valve, the slurry injection flow meter, and the slurry injection density meter. The controller can control the opening or closing of the first valve.
[0013] In one embodiment, the thickener control system further includes a slurry discharge mechanism, which includes a pumping component and a slow-containment component. The thickener has a slurry discharge outlet. The input end of the pumping component and the input end of the slow-containment component are both connected to and communicate with the slurry discharge outlet. The pumping component is used to pump out slurry, and the slow-containment component is used to contain slurry.
[0014] In one embodiment, the slow-release assembly includes a second buffer tank, a pump, and a second valve. One end of the second valve is connected to the slurry outlet, and the other end is connected to one end of the pump, while the other end of the pump is connected to the second buffer tank.
[0015] In one embodiment, the pumping assembly includes an underflow pump and a third valve, the third valve being disposed on a connecting pipeline between the input end of the underflow pump and the slurry discharge outlet.
[0016] In one embodiment, the third valve is a three-way valve having a first input terminal, a second input terminal, and an output terminal. The first input terminal of the three-way valve is connected to the slurry outlet, the second output terminal of the three-way valve is connected to the second buffer tank, and the output terminal of the three-way valve is connected to the underflow pump. The three-way valve is used to adjust the communication state between the underflow pump and the second buffer tank, as well as the communication state between the underflow pump and the slurry outlet.
[0017] In one embodiment, a pressure transmitter is provided inside the thickener. The pressure transmitter is used to detect the bottom pressure of the thickener. The pressure transmitter, the underflow pump, the pumping pump, and the second valve are all communicatively connected to the controller. The controller can control the opening or closing of the second valve and the pumping pump.
[0018] In one embodiment, the slurry discharge mechanism further includes a slurry discharge channel connected to the discharge end of the underflow pump. The slurry discharge channel is equipped with a slurry discharge flow meter and a slurry discharge density meter, both of which are communicatively connected to the controller. The slurry discharge flow meter is used to detect the slurry discharge flow rate of the slurry discharge channel, and the slurry discharge density meter is used to detect the slurry discharge density of the slurry discharge channel.
[0019] In one embodiment, both the first buffer tank and the second buffer tank are equipped with level sensors, which are communicatively connected to the controller.
[0020] In one embodiment, the slurry injection mechanism further includes a fourth valve, the input end of which is connected to the bottom of the first buffer tank, and the output end of which is connected to the slurry injection channel.
[0021] In one embodiment, the slurry injection mechanism further includes a flocculant storage tank, which is connected to the input end of the flocculant delivery pump via a pipeline.
[0022] Compared with related technologies, the thickener control system provided by this utility model, by connecting a first buffer tank to the slurry injection channel of the thickener, and controlling the opening and closing of a first valve according to the slurry injection flow rate and density, as well as the operating frequency of the flocculant delivery pump, diverts part of the injected slurry and temporarily stores it in the first buffer tank. This ensures that the thickener can still operate efficiently and stably even when the maximum operating frequency of the flocculant delivery pump cannot meet the balance requirements of the slurry flow rate and density. When the slurry injection flow rate detected by the slurry injection flow meter and the slurry injection density detected by the slurry injection density meter both correspond to a real-time operating frequency of the flocculant delivery pump that is greater than the maximum operating frequency of the flocculant delivery pump, it indicates that the slurry flow rate and density that can be balanced by the maximum operating frequency of the flocculant delivery pump have been exceeded. The controller can then open the first valve to divert the slurry, thereby balancing the slurry flow rate and density in the slurry injection channel and matching the operating frequency of the flocculant delivery pump. When the slurry injection flow rate detected by the slurry injection flow meter and the slurry injection density detected by the slurry injection density meter both correspond to the required real-time operating frequency of the flocculant delivery pump, which is equal to or less than the maximum operating frequency of the flocculant delivery pump, it indicates that although the slurry flow rate and density in the slurry injection channel fluctuate, the controller can adaptively adjust the operating frequency of the flocculant delivery pump to meet the slurry injection needs of the thickener. The controller can keep the first valve closed and not divert the slurry, so the thickener can maintain a stable working state. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the thickener control system provided in this embodiment of the utility model;
[0024] Figure 2 This is a control block diagram of the thickener control system provided in an embodiment of this utility model.
[0025] In the picture:
[0026] 1. Thickener; 101. Slurry injection channel; 102. Slurry discharge outlet; 103. Slurry discharge channel;
[0027] 2. Slurry injection mechanism; 21. Flocculant delivery pump; 22. First buffer tank; 23. First valve; 24. Fourth valve; 25. Flocculant storage tank;
[0028] 3. Slurry discharge mechanism; 31. Pumping assembly; 311. Underflow pump; 312. Third valve; 32. Slow-release assembly; 321. Second buffer tank; 322. Pumping pump; 323. Second valve;
[0029] 4. Controller; 401. Slurry injection flow meter; 402. Slurry injection density meter; 403. Slurry discharge flow meter; 404. Slurry discharge density meter; 405. Pressure transmitter; 406. Liquid level sensor. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0034] To address the technical problem that the thickener still exhibits unstable thickening effects when the maximum adjustable frequencies of the flocculant delivery pump and the underflow pump cannot meet the operational balance requirements, this invention provides a thickener control system that can maintain stable operation of the thickener even when the maximum adjustable frequencies of the flocculant delivery pump and the underflow pump cannot meet the operational balance requirements.
[0035] It should be noted that the thickener control system of this utility model is used for, but not limited to, thickening of laterite nickel ore slurry. For ease of explanation, this utility model only uses the application of the thickener control system to thickening of laterite nickel ore slurry as an example. The principle of the thickener control system applied to other types of equipment is essentially the same as that applied to thickening of other slurries, and will not be described in detail here.
[0036] Please see Figure 1 and Figure 2 The thickener control system proposed in this embodiment includes a thickener 1, a slurry injection mechanism 2, a slurry injection flow meter 401, a slurry injection density meter 402, and a controller 4. The thickener 1 has a slurry injection channel 101, which can optionally be located on the top of the thickener 1. The slurry injection mechanism 2 includes a flocculant delivery pump 21, a first buffer tank 22, and a first valve 23. The flocculant delivery pump 21 is connected to the thickener 1, and the other end of the flocculant delivery pump 21 is connected to a flocculant supply device through a pipeline for flocculant delivery. The first valve 23 is connected between the slurry injection channel 101 and the first buffer tank 22. When the first valve 23 is open, the slurry in the slurry injection channel 101 can be diverted to the first buffer tank 22 for storage.
[0037] The flocculant delivery pump 21, the first valve 23, the slurry injection flow meter 401, and the slurry injection density meter 402 are all communicatively connected to the controller 4. The controller 4 is used to select whether to open or close the first valve 23 based on the slurry flow rate and density of the thickener 1 and the real-time operating frequency of the flocculant delivery pump 21. The flocculant delivery pump 21 is equipped with a frequency converter to adjust its operating frequency. When the slurry flow rate and density in the slurry injection channel 101 fluctuate, the controller 4 controls the operating frequency of the flocculant delivery pump 21 to adjust accordingly. When the slurry flow rate and density exceed the slurry flow rate and density that can be balanced by its maximum operating frequency, the first valve 23 is opened to divert the slurry, thereby balancing the slurry flow rate and density in the slurry injection channel 101 and matching the operating frequency of the flocculant delivery pump 21.
[0038] Specifically, when the real-time operating frequency of the flocculant delivery pump 21, which corresponds to the slurry injection flow rate detected by the slurry injection flow meter 401 and the slurry injection density detected by the slurry injection density meter 402, is greater than the maximum operating frequency of the flocculant delivery pump 21, it indicates that the slurry flow rate and slurry density that can be balanced by the maximum operating frequency of the flocculant delivery pump 21 have been exceeded. The controller 4 can open the first valve 23 to divert the slurry, thereby balancing the slurry flow rate and slurry density in the slurry injection channel 101 and matching the operating frequency of the flocculant delivery pump 21.
[0039] When the slurry injection flow rate detected by the slurry injection flow meter 401 and the slurry injection density detected by the slurry injection density meter 402 correspond to the real-time operating frequency of the flocculant delivery pump 21 which is equal to or less than the maximum operating frequency of the flocculant delivery pump 21, it indicates that although the slurry flow rate and density in the slurry injection channel 101 fluctuate, the controller 4 can adaptively adjust the operating frequency of the flocculant delivery pump 21 to meet the slurry injection needs of the thickener 1. The controller 4 can keep the first valve 23 closed and not divert the slurry, and the thickener 1 can maintain a stable working state.
[0040] Understandably, in the control of controller 4, corresponding thresholds are set for the slurry flow rate and slurry density of the slurry injection channel 101. These thresholds correspond to the flocculant delivery flow rate and density corresponding to the maximum operating frequency of the flocculant delivery pump 21. If the delivery flow rate and density cannot reach a balance with the slurry injection ratio, the first valve 23 is opened to divert the flow, thereby achieving a stable operating state for the thickener 1. The controller can adaptively adjust the operating frequency of the flocculant delivery pump 21 based on the slurry injection flow rate detected by the slurry injection flow meter 401 and the slurry injection density detected by the slurry injection density meter 402.
[0041] Understandably, controller 4 can be a programmable logic controller (PLC). The PLC collects some operating parameters of the thickener and flocculant delivery pump, such as the slurry flow rate and density of the thickener and the operating frequency of the flocculant delivery pump, to generate corresponding electrical signals. These electrical signals are then transmitted to the digital input card of the PLC, which outputs the corresponding digital signal to the first valve to control the opening or closing of the first valve.
[0042] Optionally, the slurry injection flow meter 401 and the slurry injection density meter 402 can be installed on the slurry injection channel 101, or they can be installed at the inlet position inside the thickener 1 that communicates with the slurry injection channel 101, so as to accurately detect the flow rate and density of the injected slurry.
[0043] Please see Figure 1 and Figure 2 In some embodiments, to balance the pressure of the thickened slurry accumulated at the bottom of the thickener 1 and the slurry discharge, the present invention further includes a slurry discharge mechanism 3. The slurry discharge mechanism 3 includes a pumping component 31 and a slow-release component 32. The thickener 1 has a slurry outlet 102. The input end of the pumping component 31 and the slow-release component 32 are both connected and communicate with the slurry outlet 102. That is, the pumping component 31 is connected and communicates with the slurry outlet 102 and is used to pump out the slurry. The slow-release component 32 is connected and communicates with the slurry outlet 102 and is used to contain the slurry. The input end of the pumping component 31 and the input end of the slow-release component 32 can also be connected. The pumping component 31 is used for normal slurry discharge. When the pressure value caused by the accumulation of thickened slurry inside the thickener 1 is too high and exceeds the maximum frequency that the pumping component 31 can handle, the slow-release component 32 is activated to divert and contain part of the slurry, thereby balancing the amount of thickened slurry inside the thickener 1 and the amount of slurry pumped out.
[0044] In some embodiments, the pumping assembly 31 includes an underflow pump 311 and a third valve 312. The third valve 312 is disposed on the connecting pipeline between the input end of the underflow pump 311 and the slurry outlet 102. The underflow pump 311 is connected to the slurry outlet 102 through the third valve 312. By opening the third valve 312 and starting the underflow pump 311, the slurry at the bottom of the thickener 1 can be pumped out.
[0045] The slow-release assembly 32 includes a second buffer tank 321, a pump 322, and a second valve 323. One end of the second valve 323 is connected to the slurry outlet 102, and the other end is connected to one end of the pump 322. The other end of the pump 322 is connected to the second buffer tank 321. By opening the second valve 323, the slurry at the bottom can be diverted and temporarily stored in the second buffer tank 321.
[0046] Please see Figure 1 and Figure 2In some embodiments, in order to pump the slurry from the second buffer tank 321 within a controllable range, the third valve 312 is a three-way valve. The three-way valve has a first input end, a second input end, and an output end. The first input end of the three-way valve is connected to the slurry outlet 102, the second output end of the three-way valve is connected to the second buffer tank 321, and the output end of the three-way valve is connected to the underflow pump 311. The three-way valve is used to adjust the communication state between the underflow pump 311 and the second buffer tank 321, as well as the communication state between the underflow pump 311 and the slurry outlet 102. The three-way valve is connected to the second buffer tank 321, the underflow pump 311, and the slurry outlet 102 respectively. It is used to switch the connection between the underflow pump 311 and the second buffer tank 321, or between the underflow pump 311 and the slurry outlet 102. When the underflow pump 311 is connected to the slurry outlet 102, the underflow pump 311 performs the normal action of pumping and discharging the slurry. When the underflow pump 311 is connected to the second buffer tank 321, the underflow pump 311 is used to pump and discharge the slurry temporarily stored in the second buffer tank 321.
[0047] Understandably, when the slurry pressure is within a controllable range, the slurry pumping from thickener 1 can be temporarily suspended, and the slurry in the second buffer tank 321 can be pumped out first. Furthermore, the pump 322 can also be a pump body capable of both forward and reverse pumping, and a connecting pipe to the discharge channel can be installed on the pipe at its inlet end, with a valve installed, so that the slurry can be pumped out by reverse pumping.
[0048] Please see Figure 1 and Figure 2 In some embodiments, in order to discharge the slurry in the first buffer tank 22, the slurry injection mechanism 2 further includes a fourth valve 24. The input end of the fourth valve 24 is connected to the bottom of the first buffer tank 22, and the output end of the fourth valve 24 is connected to the slurry injection channel 101. When the slurry injection is within the controllable frequency range of the flocculant delivery pump 21, the fourth valve 24 can be opened to re-inject the slurry in the first buffer tank 22 into the thickener 1.
[0049] In some embodiments, a pressure transmitter 405 is installed inside the thickener 1. The pressure transmitter 405 is used to detect the bottom pressure of the thickener 1. The pressure transmitter 405, the underflow pump 311, the pump 322, and the second valve 323 are all communicatively connected to the controller 4. The underflow pump 311 has a maximum operating frequency. The controller 4 is a programmable logic controller. The controller 4 can select to open or close the second valve 323 and the pump 322 based on the bottom pressure of the thickener 1 detected by the pressure transmitter 405 and the real-time operating frequency of the underflow pump 311. During normal use, the controller 4 can control the operating frequency of the underflow pump 311 based on the pressure value of the pressure transmitter 405.
[0050] Specifically, when the bottom pressure detected by the pressure transmitter 405 corresponds to the real-time operating frequency of the underflow pump 311 which is greater than the maximum operating frequency of the underflow pump 311, it indicates that the slurry discharge exceeds the controllable range of the underflow pump 311, that is, exceeds the threshold value of the bottom pressure of the thickener 1 and the maximum operating frequency of the underflow pump 311. The controller 4 can open the second valve 323 and the pump 322 to divert and store the slurry into the second buffer tank 321, thereby balancing the slurry discharge pressure to match the operating frequency of the underflow pump 311.
[0051] When the bottom pressure detected by the pressure transmitter 405 corresponds to the real-time operating frequency of the required underflow pump 311, which is equal to or less than the maximum operating frequency of the underflow pump 311, it indicates that the slurry discharge is within the controllable range of the underflow pump 311. The controller can adapt to the slurry discharge pressure by adjusting the real-time operating frequency of the underflow pump 311. The controller 4 can keep the second valve 323 and the pump 322 closed and not divert the discharged slurry.
[0052] Please see Figure 1 and Figure 2 In some embodiments, the slurry discharge mechanism 3 further includes a slurry discharge channel 103, which is connected to the discharge end of the underflow pump 311. A slurry discharge flow meter 403 and a slurry discharge density meter 404 are provided on the slurry discharge channel 103. Both the slurry discharge flow meter 403 and the slurry discharge density meter 404 are communicatively connected to the controller. The slurry discharge flow meter 403 is used to detect the slurry discharge flow rate of the slurry discharge channel 103, and the slurry discharge density meter 404 is used to detect the slurry discharge density of the slurry discharge channel 103. The slurry discharge flow rate detected by the slurry discharge flow meter 403 and the slurry discharge density detected by the slurry discharge density meter 404 can be transmitted to the controller 4, which can effectively monitor the flow rate and density of the slurry discharged from the thickener 1. When the detection parameters of the slurry discharge flow meter 403 and the slurry discharge density meter 404 are greater than the preset value, the controller 4 can also open the second valve 323 and the pumping pump 322 to divert and pump out the slurry and store it in the second buffer tank 321.
[0053] Please see Figure 1 and Figure 2In some embodiments, both the first buffer tank 22 and the second buffer tank 321 are equipped with level sensors 406, which are communicatively connected to the controller 4. The level sensor 406 on the first buffer tank 22 is used to detect the liquid level in the first buffer tank 22. When the flocculant delivery pump 21 is within a relatively loose controllable range, and the first buffer tank 22 still contains slurry as detected by the level sensor 406, the fourth valve 24 is opened, and the slurry is discharged along with the injected slurry and injected into the thickener 1. The level sensor 406 on the second buffer tank 321 is used to detect the liquid level in the second buffer tank 321. When the underflow pump 311 is within a relatively loose controllable range, and the second buffer tank 321 still contains slurry as detected by the level sensor 406, the passage of the third valve 312 is switched to connect to the second buffer tank 321, and the slurry inside is pumped out.
[0054] In some embodiments, the slurry injection mechanism 2 further includes a flocculant storage tank 25, which is connected to the input end of the flocculant delivery pump 21 via a pipeline. The flocculant storage tank 25 can store a large amount of flocculant to maintain the continuous supply of the flocculant delivery pump 21 and improve the supply stability of the flocculant delivery pump 21.
[0055] To better understand this utility model, the following is combined with... Figures 1 to 2 The technical solution of this utility model is described in detail as follows: the first valve 23, the second valve 323 and the fourth valve 24 are all normally closed, while the third valve 312 is initially open and connects the thickener 1 and the underflow pump 311.
[0056] When the slurry is injected, if the real-time operating frequency of the flocculant delivery pump 21, which corresponds to the slurry injection flow rate detected by the slurry injection flow meter 401 and the slurry injection density detected by the slurry injection density meter 402, is greater than the maximum operating frequency of the flocculant delivery pump 21, it exceeds the controllable range of the flocculant delivery pump 21. That is, it exceeds the corresponding threshold of the slurry flow rate and slurry density of the injection thickener 1 and the maximum operating frequency of the flocculant delivery pump 21. Then, the first valve 23 is opened to divert the slurry and store it in the first buffer tank 22.
[0057] When the flocculant delivery pump 21 is within a relatively loose and controllable range, and the first buffer tank 22 still contains slurry as detected by the level sensor 406, for example, when the slurry injection flow rate detected by the slurry injection flow meter 401 and the slurry injection density detected by the slurry injection density meter 402 together correspond to the required real-time operating frequency of the flocculant delivery pump 21, which is equal to or less than the maximum operating frequency of the flocculant delivery pump 21, then the fourth valve 24 is opened, and the slurry is discharged along with the injected slurry and injected into the thickener 1. When the slurry is discharged, the fourth valve 24 is closed again.
[0058] When the slurry is discharged, if the real-time operating frequency of the underflow pump 311 corresponding to the bottom pressure detected by the pressure transmitter 405 is greater than the maximum operating frequency of the underflow pump 311, it exceeds the controllable range of the underflow pump 311, that is, it exceeds the threshold value of the bottom pressure of the thickener 1 and the maximum operating frequency of the underflow pump 311. Then the second valve 323 and the pump 322 are opened to divert and pump out the slurry and store it in the second buffer tank 321.
[0059] When the underflow pump 311 is within a relatively loose and controllable range, and the second buffer tank 321 still contains slurry as detected by the level sensor 406, for example, when the bottom pressure detected by the pressure transmitter 405 corresponds to the required real-time operating frequency of the underflow pump 311, which is equal to or less than the maximum operating frequency of the underflow pump 311, the passage of the third valve 312 is switched to connect it to the second buffer tank 321 to pump out the slurry inside. After the pumping is completed, the passage is switched back to the original passage.
[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A thickener control system, characterized in that, include: Thickener (1) has a slurry injection channel (101); The slurry injection mechanism (2) includes a flocculant delivery pump (21), a first buffer tank (22) and a first valve (23). The output end of the flocculant delivery pump (21) is connected to the thickener (1), and the first valve (23) is connected between the slurry injection channel (101) and the first buffer tank (22). A slurry injection flow meter (401) is used to detect the slurry injection flow rate of the thickener (1); A slurry injection density meter (402) is used to detect the slurry injection density of the thickener (1); The controller (4) is connected in communication with the flocculant delivery pump (21), the first valve (23), the slurry injection flow meter (401) and the slurry injection density meter (402). The controller (4) can control the opening or closing of the first valve (23).
2. The thickener control system according to claim 1, characterized in that, The thickener control system also includes a slurry discharge mechanism (3), which includes a pumping component (31) and a slow-containment component (32). The thickener (1) has a slurry discharge outlet (102). The input end of the pumping component (31) and the input end of the slow-containment component (32) are both connected to and communicate with the slurry discharge outlet (102). The pumping component (31) is used to pump out slurry, and the slow-containment component (32) is used to contain slurry.
3. The thickener control system according to claim 2, characterized in that, The slow-release assembly (32) includes a second buffer tank (321), a pump (322), and a second valve (323). One end of the second valve (323) is connected to the slurry outlet (102), and the other end is connected to one end of the pump (322). The other end of the pump (322) is connected to the second buffer tank (321).
4. The thickener control system according to claim 3, characterized in that, The pumping assembly (31) includes an underflow pump (311) and a third valve (312), wherein the third valve (312) is disposed on the connecting pipeline between the input end of the underflow pump (311) and the slurry outlet (102).
5. The thickener control system according to claim 4, characterized in that, The third valve (312) is a three-way valve, which has a first input end, a second input end and an output end. The first input end of the three-way valve is connected to the slurry outlet (102), the second output end of the three-way valve is connected to the second buffer tank (321), and the output end of the three-way valve is connected to the underflow pump (311). The three-way valve is used to adjust the communication state between the underflow pump (311) and the second buffer tank (321) and the communication state between the underflow pump (311) and the slurry outlet (102).
6. The thickener control system according to claim 5, characterized in that, The thickener (1) is equipped with a pressure transmitter (405), which is used to detect the bottom pressure of the thickener (1). The pressure transmitter (405), the underflow pump (311), the pump (322) and the second valve (323) are all connected to the controller (4). The controller (4) can control the opening or closing of the second valve (323) and the pump (322).
7. The thickener control system according to any one of claims 4-6, characterized in that, The slurry discharge mechanism (3) further includes a slurry discharge channel (103), which is connected to the discharge end of the underflow pump (311). A slurry discharge flow meter (403) and a slurry discharge density meter (404) are provided on the slurry discharge channel (103). Both the slurry discharge flow meter (403) and the slurry discharge density meter (404) are communicatively connected to the controller (4). The slurry discharge flow meter (403) is used to detect the slurry discharge flow rate of the slurry discharge channel (103), and the slurry discharge density meter (404) is used to detect the slurry discharge density of the slurry discharge channel (103).
8. The thickener control system according to any one of claims 3-6, characterized in that, Both the first buffer tank (22) and the second buffer tank (321) are equipped with liquid level sensors (406), and the liquid level sensors (406) are communicatively connected to the controller (4).
9. The thickener control system according to any one of claims 1-6, characterized in that, The slurry injection mechanism (2) further includes a fourth valve (24), the input end of which is connected to the bottom of the first buffer tank (22), and the output end of which is connected to the slurry injection channel (101).
10. The thickener control system according to any one of claims 1-6, characterized in that, The slurry injection mechanism (2) also includes a flocculant storage tank (25), which is connected to the input end of the flocculant delivery pump (21) via a pipeline.