Slurry washing device

Abstract

The utility model provides a slurry washing device, and relates to the technical field of electrode material production. The slurry washing device comprises a filter press, a liquid inlet pipe, a liquid outlet pipe, a first conductivity electrode and a second conductivity electrode, wherein the filter press is provided with a liquid inlet end and a liquid outlet end; the liquid inlet pipe is arranged at the liquid inlet end; the liquid outlet pipe is arranged at the liquid outlet end; and the control assembly is electrically connected with the first conductivity electrode and the second conductivity electrode respectively. The first conductivity electrode is used for detecting first conductivity, and the second conductivity electrode is used for detecting second conductivity. The control assembly is used for obtaining a current conductivity difference value according to the first conductivity and the second conductivity and judging whether the current conductivity difference value is smaller than or equal to a preset conductivity difference value or not. According to the slurry washing device provided by the invention, whether the ion impurity content in the slurry is qualified or not can be quickly judged without disassembling the filter press for sampling, so that the working efficiency of the filter press is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of electrode material production, and in particular to a slurry washing device. Background Art

[0002] In wet smelting, the washing process of slurry is indispensable. At present, in the production process of electrode materials, the content of ionic impurities (such as Cl, S, Ca, Na, Mg, etc.) exceeds the standard, and thus the required standards of product quality cannot be met. Usually, the slurry is filtered and washed to reduce the content of ionic impurities so that the product quality meets the standard. For example, the main ionic impurities of products such as cobalt carbonate and lithium carbonate are removed by filtering and washing. Usually, a filter press is used to filter, wash, press and blow the slurry to obtain a filter cake-like material.

[0003] However, after the filter press finishes washing the slurry, in order to detect whether the content of ionic impurities in the washed slurry is up to standard, it is necessary to loosen the compressed filter plates and take out a piece of material from between the filter plates for testing. If it is found after sampling that the content of impurity ions is unqualified, it is necessary to re-lock the filter plates and wash them again. The operation process is cumbersome and time-consuming, which affects the working efficiency of the filter press. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a slurry washing device, which aims to solve the technical problem of low working efficiency of the filter press caused by using sampling method to detect whether the content of impurity ions is qualified.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] An embodiment of the present application provides a slurry washing device, comprising:

[0007] The filter press has a liquid inlet end and a liquid outlet end, wherein the liquid inlet end is provided with a liquid inlet pipe, and the liquid outlet end is provided with a liquid outlet pipe;

[0008] A first conductivity electrode, disposed on the liquid inlet pipe, for detecting a first conductivity of the liquid in the liquid inlet pipe;

[0009] A second conductivity electrode is disposed on the liquid outlet pipe and is used to detect a second conductivity of the liquid in the liquid outlet pipe;

[0010] A control component is electrically connected to the first conductivity electrode and the second conductivity electrode respectively, and is used to obtain a current conductivity difference according to the first conductivity and the second conductivity, and to determine whether the current conductivity difference is less than or equal to a preset conductivity difference.

[0011] In one embodiment, the slurry washing device also includes a washing liquid container and a liquid inlet valve arranged on the liquid inlet pipe, the washing liquid container is connected to the end of the liquid inlet pipe away from the filter press, the liquid inlet valve is located on the side of the first conductivity electrode away from the filter press, and is electrically connected to the control component.

[0012] In one of the embodiments, the slurry washing device further comprises a first liquid pump disposed on the liquid inlet pipe, wherein the first liquid pump is located between the liquid inlet valve and the washing liquid container and is electrically connected to the control component.

[0013] In one embodiment, the control component includes a display unit, a judgment unit and a control unit, the display unit, the judgment unit, the first liquid pump, the liquid inlet valve, the first conductivity electrode and the second conductivity electrode are electrically connected to the control unit respectively, the display unit is used to display the first conductivity, the second conductivity and the current conductivity difference, and the judgment unit is used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference.

[0014] In one embodiment, the slurry washing device also includes a reflux pipe, a first reflux valve, a second reflux valve and a drain valve, one end of the reflux pipe is connected to the liquid inlet pipe through the first reflux valve, the other end of the reflux pipe is connected to the liquid outlet pipe through the second reflux valve, the drain valve is arranged on the liquid outlet pipe and away from the second reflux valve, and the first reflux valve, the second reflux valve and the drain valve are electrically connected to the control component respectively.

[0015] In one embodiment, the slurry washing device also includes a reflux liquid container, a liquid level sensor and a second liquid pump, the reflux liquid container and the second liquid pump are respectively arranged on the reflux pipe, and the second liquid pump is located between the first reflux valve and the reflux liquid container, the liquid level sensor is arranged on the reflux liquid container, and is used to detect the current liquid level of the reflux liquid container, and the liquid level sensor and the second liquid pump are respectively electrically connected to the control component.

[0016] In one embodiment, the control component includes a display unit, a judgment unit and a control unit. The display unit, the judgment unit, the first reflux valve, the second reflux valve, the liquid level sensor, the drain valve, the first conductivity electrode, the second conductivity electrode and the inlet valve are electrically connected to the control unit respectively. The display unit is used to display the first conductivity, the second conductivity, the current liquid level and the current conductivity difference. The judgment unit is used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference, and is also used to judge whether the second conductivity is greater than or equal to the saturated conductivity, and is also used to judge whether the current liquid level is greater than or equal to the preset upper limit liquid level, and judge whether the current liquid level is less than or equal to the preset lower limit liquid level.

[0017] In one embodiment, the slurry washing device also includes a heating element and a temperature sensor. The heating element is arranged on the washing liquid container and is electrically connected to the control component. The temperature sensor is arranged on the liquid inlet pipe and is electrically connected to the control component for detecting the current temperature of the liquid in the liquid inlet pipe.

[0018] In one of the embodiments, the temperature sensor is arranged close to the filter press.

[0019] In one embodiment, the control component includes a display unit, a judgment unit and a control unit. The display unit, the judgment unit, the heating element, the temperature sensor, the first conductivity electrode, the second conductivity electrode and the liquid inlet valve are electrically connected to the control unit respectively. The judgment unit is used to judge whether the current temperature is less than a preset temperature, and is also used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference. The display unit is used to display the current temperature.

[0020] The beneficial effects of the present application are as follows: the present application provides a slurry washing device, by setting a first conductivity electrode on the liquid inlet pipe to detect the conductivity of the liquid in the liquid inlet pipe, thereby obtaining a first conductivity, and by setting a second conductivity electrode on the liquid outlet pipe to detect the conductivity of the liquid in the liquid outlet pipe, thereby obtaining a second conductivity. On this basis, the control component is electrically connected to the first conductivity electrode and the second conductivity electrode respectively, and the control component can be used to calculate the difference between the second conductivity and the first conductivity, thereby obtaining the current conductivity difference, and judging whether the current conductivity difference is less than or equal to the preset conductivity difference. If so, it is judged that the ionic impurity content in the slurry is qualified, and there is no need to continue washing the slurry. If not, it is judged that the ionic impurities in the slurry are unqualified and need to continue washing. In this way, it is possible to quickly judge whether the ionic impurity content in the slurry is qualified without disassembling the filter press for sampling, so that the working efficiency of the filter press is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a slurry washing device in some embodiments of the present application is shown;

[0023] Figure 2 A schematic diagram of the structure of the control component in some embodiments of the present application is shown.

[0024] Description of main component symbols:

[0025] 100-slurry washing device; 110-filter press; 111-liquid inlet pipe; 112-liquid outlet pipe; 120-first conductivity electrode; 130-second conductivity electrode; 140-control component; 141-display unit; 142-judgment unit; 143-control unit; 151-washing liquid container; 152-liquid inlet valve; 153-first liquid pump; 161-reflux pipe; 162-reflux liquid container; 163-liquid level sensor; 164-first reflux valve; 165-second reflux valve; 166-liquid discharge valve; 167-second liquid pump; 171-heating element; 172-temperature sensor. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] like Figure 1 As shown, an embodiment of the present application provides a slurry washing device 100 , including a filter press 110 , a first conductivity electrode 120 , a second conductivity electrode 130 , and a control component 140 .

[0031] The filter press 110 has a liquid inlet end and a liquid outlet end, wherein a liquid inlet pipe 111 is provided at the liquid inlet end, and a liquid outlet pipe 112 is provided at the liquid outlet end. A first conductivity electrode 120 is provided on the liquid inlet pipe 111, and is used to detect a first conductivity of the liquid in the liquid inlet pipe 111, and a second conductivity electrode 130 is provided on the liquid outlet pipe 112, and is used to detect a second conductivity of the liquid in the liquid outlet pipe 112. The control component 140 is electrically connected to the first conductivity electrode 120 and the second conductivity electrode 130, respectively, and is used to obtain a current conductivity difference according to the first conductivity and the second conductivity, and to determine whether the current conductivity difference is less than or equal to a preset conductivity difference.

[0032] It should be noted that the current conductivity difference is equal to the value obtained by subtracting the first conductivity from the second conductivity. The liquid inlet pipe 111 is used to input washing liquid to the filter press 110, and the liquid outlet pipe 112 is used to output the waste liquid generated by the filter press 110 during the slurry treatment process.

[0033] It should be mentioned that the above-mentioned preset conductivity difference can be set according to design requirements, and the specific value of the preset conductivity difference is not limited here. For the convenience of explanation, here we take the washing of cobalt carbonate slurry as an example. When the washing liquid selects pure water, the first conductivity is 0ms / cm, and the preset conductivity difference can be selected as 1.6ms / cm. In this way, when the second conductivity is detected to be less than or equal to 1.6ms / cm, it can be determined that the ionic impurity content in the slurry is qualified. When the second conductivity is detected to be greater than 1.6ms / cm, it can be determined that the ionic impurity content in the slurry is unqualified and needs to be continued. When the washing liquid selects a certain recycled water in the workshop, the first conductivity is 1.2ms / cm, and the preset conductivity difference can be selected as 0.3ms / cm. In this way, when the second conductivity is detected to be less than or equal to 1.5ms / cm, it can be determined that the ionic impurity content in the slurry is qualified. When the second conductivity is detected to be greater than 1.5ms / cm, it can be determined that the ionic impurity content in the slurry is unqualified and needs to be continued.

[0034] In the related art, after the filter press has finished washing the slurry, in order to detect whether the content of ionic impurities in the washed slurry is qualified, it is necessary to loosen the compressed filter plate and take out a piece of material from between the filter plates for testing. If it is found that the content of impurity ions is unqualified after sampling and testing, it is necessary to re-lock the filter plate and wash it again. The operation process is cumbersome and time-consuming, which affects the working efficiency of the filter press.

[0035] It can be understood that in the slurry washing device 100 provided in this embodiment, a first conductivity electrode 120 is set on the liquid inlet pipe 111 to detect the conductivity of the liquid in the liquid inlet pipe 111, thereby obtaining a first conductivity, and a second conductivity electrode 130 is set on the liquid outlet pipe 112 to detect the conductivity of the liquid in the liquid outlet pipe 112, thereby obtaining a second conductivity. On this basis, the control component 140 is electrically connected to the first conductivity electrode 120 and the second conductivity electrode 130 respectively, and the control component 140 can be used to calculate the difference between the second conductivity and the first conductivity, thereby obtaining the current conductivity difference, and judging whether the current conductivity difference is less than or equal to the preset conductivity difference. If so, it is determined that the ionic impurity content in the slurry is qualified, and there is no need to continue washing the slurry. If not, it is determined that the ionic impurities in the slurry are unqualified and need to continue washing. In this way, whether the ionic impurity content in the slurry is qualified can be quickly determined without disassembling the filter press 110 for sampling, so that the working efficiency of the filter press 110 is effectively improved.

[0036] like Figure 1As shown, in one embodiment, the slurry washing device 100 also includes a washing liquid container 151 and a liquid inlet valve 152 arranged on the liquid inlet pipe 111, the washing liquid container 151 is connected to the end of the liquid inlet pipe 111 away from the filter press 110, the liquid inlet valve 152 is located on the side of the first conductivity electrode 120 away from the filter press 110, and is electrically connected to the control component 140.

[0037] It should be noted that the washing liquid container 151 is used to store the washing liquid required in the process of washing the slurry by the filter press 110, such as pure water or other mixed solutions, such as ammonium bicarbonate solution, etc. When the liquid inlet valve 152 is opened, the washing liquid in the washing liquid container 151 enters the filter press 110 through the liquid inlet pipe 111.

[0038] For example, the liquid inlet valve 152 may be a pneumatic valve, a solenoid valve or other element that can be controlled by electrical energy.

[0039] In this embodiment, a liquid inlet valve 152 is provided on the liquid inlet pipe 111, and the liquid inlet valve 152 is electrically connected to the control component 140. When the above-mentioned current conductivity difference is greater than the preset conductivity difference, it is determined that the ionic impurity content is unqualified. At this time, the control component 140 controls the liquid inlet valve 152 to open to continue washing the slurry until the current conductivity difference is less than or equal to the preset conductivity difference, and the ionic impurity content is determined to be qualified. At this time, the control component 140 controls the liquid inlet valve 152 to close, so that the washing liquid can be stopped from being input into the filter press 110 in time after the ionic impurity content is qualified, thereby saving the use of washing liquid and reducing production costs.

[0040] like Figure 1 As shown, in a specific embodiment, the slurry washing device 100 also includes a first liquid pump 153 disposed on the liquid inlet pipe 111 , the first liquid pump 153 is located between the liquid inlet valve 152 and the washing liquid container 151 , and is electrically connected to the control component 140 .

[0041] It should be noted that the first liquid pump 153 is used to suck out the washing liquid in the washing liquid container 151 and input the washing liquid into the filter press 110 through the liquid inlet pipe 111. Exemplarily, the first liquid pump 153 can be a centrifugal pump, a gear pump, a screw pump, etc.

[0042] In this embodiment, by electrically connecting the liquid inlet valve 152 and the first liquid pump 153 to the control component 140 respectively, when the above-mentioned current conductivity difference is less than or equal to the preset conductivity difference, the control component 140 will control the liquid inlet valve 152 to close, until the liquid inlet valve 152 is in a completely closed state, the control component 140 controls the first liquid pump 153 to stop running, and promptly stops inputting washing liquid into the filter press 110, thereby saving the use of washing liquid.

[0043] like Figure 1 and Figure 2 As shown, further, the control component 140 includes a display unit 141, a judgment unit 142 and a control unit 143. The display unit 141, the judgment unit 142, the first liquid pump 153, the liquid inlet valve 152, the first conductivity electrode 120 and the second conductivity electrode 130 are electrically connected to the control unit 143 respectively. The display unit 141 is used to display the first conductivity, the second conductivity and the current conductivity difference. The judgment unit 142 is used to determine whether the current conductivity difference is less than or equal to the preset conductivity difference.

[0044] In this embodiment, through the arrangement of the display unit 141, the judgment unit 142 and the control unit 143, various parameters in the process of washing slurry by the filter press 110, such as the first conductivity and the second conductivity, can be displayed, so that the staff can understand the washing condition of the slurry. At the same time, the automatic control of the liquid inlet valve 152 and the first liquid pump 153 can be realized, so that the slurry can be washed quickly, the work efficiency can be improved, the use of washing liquid can be saved, and the production cost can be reduced.

[0045] like Figure 1 As shown, in a specific embodiment, the slurry washing device 100 also includes a reflux pipe 161, a first reflux valve 164, a second reflux valve 165 and a drain valve 166. One end of the reflux pipe 161 is connected to the liquid inlet pipe 111 through the first reflux valve 164, and the other end of the reflux pipe 161 is connected to the liquid outlet pipe 112 through the second reflux valve 165. The drain valve 166 is arranged on the liquid outlet pipe 112 and away from the second reflux valve 165. The first reflux valve 164, the second reflux valve 165 and the drain valve 166 are electrically connected to the control component 140, respectively.

[0046] It can be understood that when the above current conductivity difference is less than or equal to the preset conductivity difference, it is determined that the ionic impurity content in the slurry is qualified. At this time, the control component 140 controls the liquid inlet valve 152 to close to stop washing the slurry.

[0047] When the above-mentioned current conductivity difference is greater than the preset conductivity difference, and the second conductivity is less than the saturated conductivity, it is determined that the waste liquid output by the filter press 110 has not been fully utilized. At this time, the control component 140 controls the first return valve 164 and the second return valve 165 to open, and controls the liquid inlet valve 152 to close, so as to continue to use the waste liquid to wash the slurry.

[0048] When the above-mentioned current conductivity difference is greater than the preset conductivity difference, and the second conductivity is greater than or equal to the saturated conductivity, it is determined that the waste liquid output by the filter press 110 has been completely utilized and has no reuse value. At this time, the control component 140 controls the liquid inlet valve 152 to open, and controls the first return valve 164 and the second return valve 165 to close. At the same time, the drain valve 166 is controlled to open to directly drain the waste liquid, and reuse the washing liquid in the washing liquid container 151 to wash the slurry. In this way, the waste liquid output by the filter press 110 can be recycled, reducing production costs.

[0049] It should be noted that when the electrolyte in the liquid dissolves to a saturated state, that is, the solubility reaches a maximum value, the conductivity of the liquid at this time is called saturated conductivity. For example, the saturated conductivity can be selected as 2.3ms / cm, 2.4ms / cm, 2.5ms / cm, 2.6ms / cm, etc., and can be set according to design requirements.

[0050] like Figure 1 As shown, further, the slurry washing device 100 also includes a reflux liquid container 162, a liquid level sensor 163 and a second liquid pump 167. The reflux liquid container 162 and the second liquid pump 167 are respectively arranged on the reflux pipe 161, and the second liquid pump 167 is located between the first reflux valve 164 and the reflux liquid container 162. The liquid level sensor 163 is arranged on the reflux liquid container 162 for detecting the current liquid level of the reflux liquid container 162. The liquid level sensor 163 and the second liquid pump 167 are respectively electrically connected to the control component 140.

[0051] It can be understood that when the above-mentioned current conductivity difference is greater than the preset conductivity difference, and the second conductivity is less than the saturated conductivity, it is determined that the waste liquid output by the filter press 110 has not been fully utilized. At this time, the control component 140 controls the second reflux valve 165 to open, so that the waste liquid output by the filter press 110 is filled into the reflux liquid container 162. When the liquid level sensor 163 detects that the current liquid level of the reflux liquid container 162 is greater than or equal to the preset upper limit liquid level, it is determined that the reflux liquid container 162 is full. At this time, the control component 140 controls the liquid inlet valve 152 to close, and controls the second liquid pump 167 to start running, and at the same time controls the first reflux valve 164 to open, so as to continue to use the waste liquid to wash the slurry.

[0052] When the above-mentioned current conductivity difference is greater than the preset conductivity difference, and the second conductivity is greater than or equal to the saturated conductivity, it is determined that the waste liquid output by the filter press 110 has been fully utilized and has no reuse value. At this time, the control component 140 controls the liquid inlet valve 152 and the liquid discharge valve 166 to open, and controls the first reflux valve 164 to close, so that the waste liquid output by the filter press 110 is directly discharged, and the washing liquid in the washing liquid container 151 is reused to wash the slurry, and the waste water stored in the reflux liquid container 162 is discharged at the same time, until the liquid level sensor 163 detects that the current liquid level of the reflux liquid container 162 is less than or equal to the preset lower limit liquid level, it is determined that the waste water in the reflux liquid container 162 has been emptied.

[0053] like Figure 1 and Figure 2 As shown, further, the control component 140 includes a display unit 141, a judgment unit 142 and a control unit 143. The display unit 141, the judgment unit 142, the first reflux valve 164, the second reflux valve 165, the liquid level sensor 163, the drain valve 166, the first conductivity electrode 120, the second conductivity electrode 130 and the liquid inlet valve 152 are respectively electrically connected to the control unit 143. The display unit 141 is used to display the first conductivity, the second conductivity, the current liquid level and the current conductivity difference. The judgment unit 142 is used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference, and is also used to judge whether the second conductivity is greater than or equal to the saturated conductivity, and is also used to judge whether the current liquid level is greater than or equal to the preset upper limit liquid level, and judge whether the current liquid level is less than or equal to the preset lower limit liquid level.

[0054] In this embodiment, through the arrangement of the display unit 141, the judgment unit 142 and the control unit 143, it is possible to detect whether the washing liquid input from the washing liquid container 151 to the filter press 110 is fully utilized. If it is not fully utilized, the waste liquid output from the filter press 110 is circulated until the waste liquid can no longer filter the impurity ions, and the waste liquid is directly discharged from the liquid outlet pipe 112 through the drain valve 166, and the washing liquid in the washing liquid container 151 is reused to wash the slurry, which can effectively reduce production costs. At the same time, it is also convenient for the staff to understand the liquid level of the reflux liquid container 162.

[0055] like Figure 1 As shown, in a specific embodiment, the slurry washing device 100 also includes a heating element 171 and a temperature sensor 172. The heating element 171 is arranged on the washing liquid container 151 and is electrically connected to the control component 140. The temperature sensor 172 is arranged on the liquid inlet pipe 111 and is electrically connected to the control component 140 for detecting the current temperature of the liquid in the liquid inlet pipe 111.

[0056] For example, the heating element 171 may be a heating wire, an electric furnace tube, a hot plate, a heating film, etc. The temperature sensor 172 may be a thermal resistor, a thermistor, a thermocouple, or other element capable of detecting the temperature of a liquid.

[0057] It can be understood that when the above-mentioned current temperature is lower than the preset temperature, the control component 140 controls the heating element 171 to heat the liquid in the washing liquid container 151, so that the temperature of the washing liquid input into the filter press 110 from the washing liquid container 151 can be maintained at the preset temperature to meet the washing liquid temperature required by the filter press 110 to wash the slurry, thereby improving the washing effect on the slurry.

[0058] like Figure 1 As shown, further, the temperature sensor 172 is arranged close to the filter press 110, so that the current temperature of the liquid in the liquid inlet pipe 111 detected by the temperature sensor 172 is closer to the actual temperature of the liquid washing slurry in the filter press 110, thereby improving the control accuracy and facilitating improving the washing effect of the filter press 110 on the slurry.

[0059] like Figure 1 and Figure 2 As shown, further, the control component 140 includes a display unit 141, a judgment unit 142 and a control unit 143. The display unit 141, the judgment unit 142, the heating element 171, the temperature sensor 172, the first conductivity electrode 120, the second conductivity electrode 130 and the liquid inlet valve 152 are respectively electrically connected to the control unit 143. The judgment unit 142 is used to judge whether the current temperature is less than the preset temperature, and is also used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference. The display unit 141 is used to display the current temperature.

[0060] In this embodiment, the display unit 141, the judgment unit 142 and the control unit 143 are set to detect and control the temperature of the washing liquid input into the filter press 110 from the washing liquid container 151, so as to meet the washing liquid temperature required by the filter press 110 for washing the slurry, thereby improving the washing effect of the slurry. At the same time, it is convenient for the staff to understand the temperature of the washing liquid input into the filter press 110.

[0061] To summarize, when using the slurry washing device 100 provided in this embodiment, when the washing liquid in the washing liquid container 151 is used to wash the slurry, the control unit 143 controls the liquid inlet valve 152 to open, and controls the first liquid pump 153 to start running. At the same time, the first return valve 164 and the second return valve 165 are controlled to be closed, and the second liquid pump 167 is controlled to stop running, so that the washing liquid in the washing liquid container 151 is input into the liquid inlet end of the filter press 110 through the liquid inlet pipe 111. At the same time, the control unit 143 controls the first conductivity electrode 120 to detect the first conductivity of the liquid in the liquid inlet pipe 111, and controls the second conductivity electrode 130 to detect the second conductivity of the liquid in the liquid outlet pipe 112, thereby calculating the current conductivity difference.

[0062] When the washing liquid in the washing liquid container 151 is used to wash the slurry, when the above-mentioned current conductivity difference is greater than the preset conductivity difference, and the second conductivity is less than the saturated conductivity, the control unit 143 controls the second reflux valve 165 to open, and controls the drain valve 166 to close, so that the waste liquid output by the filter press 110 is filled into the reflux liquid container 162, until the liquid level sensor 163 detects that the current liquid level of the reflux liquid container 162 is greater than or equal to the preset upper limit liquid level, the control unit 143 controls the liquid inlet valve 152 to close, and controls the first liquid pump 153 to stop running, and at the same time, controls the first reflux valve 164 to open, and controls the second The liquid pump 167 starts running to continue washing the slurry with the waste liquid output by the filter press 110. Thereafter, when the second conductivity is greater than or equal to the saturated conductivity, the control unit 143 controls the second reflux valve 165 to close, and controls the drain valve 166 to open to discharge the waste liquid. When the liquid level sensor 163 detects that the current liquid level of the reflux liquid container 162 is less than or equal to the preset lower limit liquid level, the control unit 143 controls the liquid inlet valve 152 to open, and controls the first liquid pump 153 to start running. At the same time, the first reflux valve 164 is controlled to close, and the second liquid pump 167 is controlled to stop running, and the washing liquid in the washing liquid container 151 is used to continue washing.

[0063] When the slurry is washed with the washing liquid in the washing liquid container 151, when the above-mentioned current conductivity difference is less than or equal to the preset conductivity difference, it is determined that the ionic impurity content in the slurry is qualified. At this time, the control unit 143 controls the liquid inlet valve 152 to close, and controls the first liquid pump 153 to stop running, thereby completing the washing process of the slurry.

[0064] It can be understood that the slurry washing device 100 provided in this embodiment mainly includes the following beneficial effects:

[0065] 1. It is possible to quickly determine whether the ionic impurity content in the slurry is qualified without disassembling the filter press 110 for sampling, thereby effectively improving the working efficiency of the filter press 110. At the same time, after the slurry is washed until the ionic impurity content is qualified, the input of washing liquid to the filter press 110 can be stopped in time, thereby saving the use of washing liquid and reducing production costs.

[0066] Second, when the second conductivity is less than the saturated conductivity, the waste liquid output by the filter press 110 can be reused, thereby saving the amount of washing liquid used and reducing production costs.

[0067] 3. The temperature of the washing liquid in the washing liquid container 151 can be controlled within a preset range to improve the washing effect on the slurry and increase production efficiency.

[0068] Fourth, it is possible to monitor the first conductivity, the second conductivity, the current conductivity difference, the current liquid level of the reflux liquid container 162, and the current temperature of the liquid in the liquid inlet pipe 111 in real time, so as to facilitate the staff to understand the whole process of slurry washing.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A slurry washing device, characterized in that: include: A filter press (110) having a liquid inlet end and a liquid outlet end, wherein the liquid inlet end is provided with a liquid inlet pipe (111), and the liquid outlet end is provided with a liquid outlet pipe (112); A first conductivity electrode (120), arranged on the liquid inlet pipe (111), and used for detecting a first conductivity of the liquid in the liquid inlet pipe (111); A second conductivity electrode (130) is disposed on the liquid outlet pipe (112) and is used to detect a second conductivity of the liquid in the liquid outlet pipe (112); A control component (140) is electrically connected to the first conductivity electrode (120) and the second conductivity electrode (130), respectively, and is used to obtain a current conductivity difference value according to the first conductivity and the second conductivity, and to determine whether the current conductivity difference value is less than or equal to a preset conductivity difference value.

2. The slurry washing device according to claim 1, characterized in that: The slurry washing device also includes a washing liquid container (151) and a liquid inlet valve (152) arranged on the liquid inlet pipe (111), the washing liquid container (151) is connected to an end of the liquid inlet pipe (111) away from the filter press (110), and the liquid inlet valve (152) is located on a side of the first conductivity electrode (120) away from the filter press (110), and is electrically connected to the control component (140).

3. The slurry washing device according to claim 2, characterized in that: The slurry washing device also includes a first liquid pump (153) arranged on the liquid inlet pipe (111), the first liquid pump (153) is located between the liquid inlet valve (152) and the washing liquid container (151), and is electrically connected to the control component (140).

4. The slurry washing device according to claim 3, characterized in that: The control component (140) comprises a display unit (141), a judgment unit (142) and a control unit (143); the display unit (141), the judgment unit (142), the first liquid pump (153), the liquid inlet valve (152), the first conductivity electrode (120) and the second conductivity electrode (130) are respectively electrically connected to the control unit (143); the display unit (141) is used to display the first conductivity, the second conductivity and the current conductivity difference; the judgment unit (142) is used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference.

5. The slurry washing device according to claim 2, characterized in that: The slurry washing device further comprises a reflux pipe (161), a first reflux valve (164), a second reflux valve (165) and a drain valve (166); one end of the reflux pipe (161) is connected to the liquid inlet pipe (111) via the first reflux valve (164); the other end of the reflux pipe (161) is connected to the liquid outlet pipe (112) via the second reflux valve (165); the drain valve (166) is arranged on the liquid outlet pipe (112) and is arranged away from the second reflux valve (165); the first reflux valve (164), the second reflux valve (165) and the drain valve (166) are respectively electrically connected to the control component (140).

6. The slurry washing device according to claim 5, characterized in that: The slurry washing device also includes a reflux liquid container (162), a liquid level sensor (163) and a second liquid pump (167); the reflux liquid container (162) and the second liquid pump (167) are respectively arranged on the reflux pipe (161), and the second liquid pump (167) is located between the first reflux valve (164) and the reflux liquid container (162); the liquid level sensor (163) is arranged on the reflux liquid container (162) for detecting the current liquid level of the reflux liquid container (162); the liquid level sensor (163) and the second liquid pump (167) are respectively electrically connected to the control component (140).

7. The slurry washing device according to claim 6, characterized in that: The control component (140) comprises a display unit (141), a judgment unit (142) and a control unit (143); the display unit (141), the judgment unit (142), the first reflux valve (164), the second reflux valve (165), the liquid level sensor (163), the drain valve (166), the first conductivity electrode (120), the second conductivity electrode (130) and the liquid inlet valve (152) are respectively electrically connected to the control unit (143); the display unit (141) is used to display the first conductivity, the second conductivity, the current liquid level and the current conductivity difference; the judgment unit (142) is used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference, and is also used to judge whether the second conductivity is greater than or equal to the saturated conductivity, and is also used to judge whether the current liquid level is greater than or equal to a preset upper limit liquid level, and is also used to judge whether the current liquid level is less than or equal to a preset lower limit liquid level.

8. The slurry washing device according to claim 2, characterized in that: The slurry washing device also includes a heating element (171) and a temperature sensor (172); the heating element (171) is arranged on the washing liquid container (151) and is electrically connected to the control component (140); the temperature sensor (172) is arranged on the liquid inlet pipe (111) and is electrically connected to the control component (140) for detecting the current temperature of the liquid in the liquid inlet pipe (111).

9. The slurry washing device according to claim 8, characterized in that: The temperature sensor (172) is disposed close to the filter press (110).

10. The slurry washing device according to claim 8, characterized in that: The control component (140) comprises a display unit (141), a judgment unit (142) and a control unit (143); the display unit (141), the judgment unit (142), the heating element (171), the temperature sensor (172), the first conductivity electrode (120), the second conductivity electrode (130) and the liquid inlet valve (152) are respectively electrically connected to the control unit (143); the judgment unit (142) is used to judge whether the current temperature is less than a preset temperature, and is also used to judge whether the current conductivity difference is less than or equal to the preset conductivity difference; the display unit (141) is used to display the current temperature.

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