Solid-liquid separation method and device

Abstract

The invention relates to the technical field of solid-liquid separation, in particular to a solid-liquid separation method and device. The method comprises the following steps: under the condition that a filtering instruction is a separation liquid collection instruction, executing a first control strategy, namely controlling a first electromagnetic valve and a second electromagnetic valve to be closed, collecting the turbidity of the separation liquid detected by a first turbidimeter, and outputting turbidity exceeding prompt information under the condition that the turbidity of the separation liquid exceeds first preset turbidity, otherwise, controlling the second electromagnetic valve to open; and under the condition that the filtering instruction is a solid matter collection instruction, executing the second control strategy: controlling a first electromagnetic valve and a second electromagnetic valve to be opened, collecting a weighing value of the weighing device, and outputting humidity standard exceeding prompt information under the condition that the weighing value is higher than a preset weighing value, the technical problem that most solid-liquid separation target objects are unidirectional target objects designed on the basis of requirements, and liquid-phase or solid-phase target objects meeting the requirements cannot be selected and obtained according to the requirements in the separation operation can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of solid-liquid separation, and in particular to a solid-liquid separation method and device. Background Art

[0002] Solid-liquid separation refers to the process of separating solid particles from liquid in a solid-liquid mixture. This is very important in many fields because it can help recover valuable solid and liquid phases, while also reducing the load of subsequent treatment processes and improving treatment efficiency and product quality. Solid-liquid separation is an essential step in industries such as sewage treatment, chemicals, pharmaceuticals, and food processing.

[0003] At present, the targets of solid-liquid separation are mostly single-phase targets designed based on demand, and it is impossible to select and obtain liquid or solid targets that meet the requirements according to needs during the separation operation. Summary of the invention

[0004] Based on this, it is necessary to provide a solid-liquid separation method and device to address the above technical problems.

[0005] In a first aspect, the present application provides a solid-liquid separation method, which is applied to a solid-liquid separation system; the solid-liquid separation system comprises a raw liquid storage tank, a delivery pump and a filter tank connected in sequence; the filter tank comprises a filter assembly, a solid discharge port and a separation liquid discharge port; the system further comprises: a storage tank connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank connected to the storage tank; a first solenoid valve connected between the solid discharge port and the storage tank; a second solenoid valve connected between the outlet of the storage tank and the separation liquid collection tank; a first turbidity meter disposed at the inner bottom of the storage tank; a weighing device, wherein a weighing portion of the weighing device is in contact with and connected to the storage tank; the method comprises:

[0006] In response to receiving a filtering instruction, controlling the delivery pump to start for a first preset time to fluidize the target raw liquid in the raw liquid storage tank into the filtering tank for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction;

[0007] When the filtering instruction is a separation liquid collection instruction, the first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidity meter, and outputting a turbidity exceeding standard prompt information when the turbidity of the separation liquid exceeds the first preset turbidity, otherwise controlling the second solenoid valve to be opened;

[0008] When the filtering instruction is a solid collection instruction, the second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve and the second solenoid valve to open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt information when the weighing value is higher than the preset weighing value.

[0009] In one embodiment, the stock solution storage tank is equipped with a stirring device and a second turbidity meter; the second turbidity meter is configured to float on the surface of the stock solution; the system further includes: a precipitant delivery device, and the feeding port of the precipitant delivery device is connected to the stock solution storage tank; the method further includes:

[0010] The precipitation strategy is executed periodically; the precipitation strategy includes controlling the precipitant delivery device to deliver the precipitant when the stock solution is left to stand for a second preset time, and controlling the stirring device to stir for a third preset time in a preset stirring mode; the preset stirring mode includes stirring at a first preset speed during the precipitant delivery process, and stirring at a second preset speed after the precipitant delivery is completed; the second preset speed is greater than the first preset speed;

[0011] In response to the turbidity of the surface of the raw liquid not changing after being left to stand for a second preset time period, the precipitation strategy is stopped.

[0012] In one embodiment, the method further comprises:

[0013] Constructing a correlation model with the third preset time, the second preset speed, and the pressure of the delivery pump as inputs and the turbidity of the separation liquid as outputs, and training the correlation model based on historical data to obtain a trained correlation model;

[0014] In response to outputting the turbidity exceeding standard prompt information, providing feedback guidance on the third preset time, the second preset speed and the pressure of the delivery pump based on the trained association model until the turbidity of the separation liquid meets the first preset turbidity;

[0015] If the turbidity of the separation liquid still does not meet the first preset turbidity after the feedback guidance, a prompt message indicating that the pore size of the filter component is unqualified is output.

[0016] In one embodiment, the system further comprises an air pump; the air pump is connected between the delivery pump and the filter tank; the method further comprises:

[0017] The mass of the solids removed from the filter tank is determined based on the first mass of the raw liquid delivered by the delivery pump, the second mass of the separated liquid delivered to the storage tank, and the third mass of the solids delivered to the storage tank.

[0018] In response to the mass of the solid matter that has been shed being less than a first preset percentage, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to output normal temperature compressed air with a first preset pressure;

[0019] In response to the mass of the solid matter that has been shed being less than a second preset percentage, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to output high-temperature compressed air of a first preset pressure; wherein the first preset percentage is less than the second preset percentage;

[0020] When the air pump outputs a fourth preset time length, controlling the first solenoid valve to open;

[0021] If the solid matter has not been completely removed, the air pump is controlled to output compressed air with a preset pulsation frequency; the preset pulsation frequency is the same as the vibration frequency of the filter component when compressed air is supplied.

[0022] In one embodiment, the method further comprises:

[0023] During the process of inputting the separation liquid into the storage tank, if the change rate of the second mass is less than the preset change rate, the filter device cleaning strategy is executed; the filter device cleaning strategy includes: when it is judged that the solid matter is completely removed, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to work alternately at positive and negative pressures at a preset frequency.

[0024] In one embodiment, the method further comprises:

[0025] In response to outputting a humidity exceeding standard prompt message, the delivery pump and the first solenoid valve are controlled to close, and the air pump is controlled to output compressed air of the second preset pressure according to the fifth preset time duration. The fifth preset time duration is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of original liquid entering the storage tank, and the amount of compressed air of the second preset pressure per unit time.

[0026] In a second aspect, the present application further provides a solid-liquid separation device, which is applied to a solid-liquid separation system; the solid-liquid separation system comprises a raw liquid storage tank, a delivery pump and a filter tank connected in sequence; the filter tank comprises a filter assembly, a solid discharge port and a separation liquid discharge port; the system further comprises: a storage tank connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank connected to the storage tank; a first solenoid valve connected between the solid discharge port and the storage tank; a second solenoid valve connected between the outlet of the storage tank and the separation liquid collection tank; a first turbidity meter, which is arranged at the inner bottom of the storage tank; a weighing device, wherein the weighing part of the weighing device is in contact with and connected to the storage tank; the device comprises:

[0027] A control module, in response to receiving a filtering instruction, controls the delivery pump to start for a first preset time, and delivers the target raw liquid in the raw liquid storage tank to the filtering tank for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction;

[0028] When the filtering instruction is a separation liquid collection instruction, the first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidity meter, and outputting a turbidity exceeding standard prompt information when the turbidity of the separation liquid exceeds the first preset turbidity, otherwise controlling the second solenoid valve to be opened;

[0029] When the filtering instruction is a solid collection instruction, the second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve and the second solenoid valve to open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt information when the weighing value is higher than the preset weighing value.

[0030] In a third aspect, the present application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method provided in the first aspect of the present application are implemented.

[0031] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method provided in the first aspect of the present application.

[0032] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the method provided in the first aspect of the present application.

[0033] The above-mentioned solid-liquid separation method and device can perform solid-liquid separation on the raw liquid based on the raw liquid storage tank, the delivery pump and the filter tank connected in sequence; when liquid phase collection is required, the first solenoid valve is closed to allow the separation liquid to naturally flow into the receiving tank through the interface between the filter tank and the receiving tank, and after the qualified separation liquid is detected, the second solenoid valve is opened to allow the separation liquid in the receiving tank to pass into the separation liquid collection tank; when solid phase collection is required, the second solenoid valve is opened to allow the solid matter to fall into the receiving tank; during the collection process, different collection instructions correspond to different control strategies. If the collection instruction is a separation liquid collection instruction, then through The first control strategy includes closing the first solenoid valve and the second solenoid valve so that the separation liquid is temporarily stored in the storage tank, and judging whether the collected separation liquid is qualified based on the detection result of the turbidity meter; if the collection instruction is a solid collection instruction, the second control strategy includes controlling the first solenoid valve and the second solenoid valve to open, so that the separation liquid is emptied into the separation liquid collection tank, and the humidity of the solid is judged by weighing the mass of the remaining solids, thereby effectively avoiding the technical problem that the target of solid-liquid separation is mostly a single-phase target designed based on demand, and it is impossible to select a liquid or solid target that meets the demand according to the needs during the separation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of a solid-liquid separation system in one embodiment;

[0036] Figure 2 A flowchart of the steps for executing a precipitation strategy in one embodiment;

[0037] Figure 3 A flow chart of the steps of feedback adjustment of separation turbidity in one embodiment;

[0038] Figure 4 The present invention is a flow chart of the steps for controlling the shedding of solids in one embodiment. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the terms "connected", "connection" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0043] In an exemplary embodiment, the present application provides a solid-liquid separation method, which is applied to a solid-liquid separation system; Figure 1 As shown, the solid-liquid separation system includes a raw liquid storage tank 100, a delivery pump 200 and a filter tank 300 connected in sequence; the filter tank 300 includes a filter assembly, a solid discharge port and a separation liquid discharge port; the system also includes: a storage tank 400, connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank 600, connected to the storage tank 400; a first solenoid valve 11, connected between the solid discharge port and the storage tank 400; a second solenoid valve 22, connected between the outlet of the storage tank 400 and the separation liquid collection tank 600; a first turbidity meter 33, arranged at the inner bottom of the storage tank 400; a weighing device 500, the weighing part of the weighing device 500 is in contact with the storage tank 400; the method includes the following steps:

[0044] In response to receiving the filtering instruction, the delivery pump 200 is controlled to start for a first preset time to pressurize the target raw liquid in the raw liquid storage tank 100 to the filtering tank 300 for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction;

[0045] When the filtering instruction is a separation liquid collection instruction, the first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve 11 and the second solenoid valve 22 to close, collecting the turbidity of the separation liquid detected by the first turbidity meter 33, and outputting a turbidity exceeding standard prompt information when the turbidity of the separation liquid exceeds the first preset turbidity, otherwise controlling the second solenoid valve 22 to open;

[0046] When the filtering instruction is a solid collection instruction, the second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve 11 and the second solenoid valve 22 to open, collecting the weighing value of the weighing device 500, and outputting a humidity exceeding standard prompt information when the weighing value is higher than the preset weighing value.

[0047] Specifically, the first solenoid valve 11 and the second solenoid valve 22 are normally closed solenoid valves.

[0048] In an exemplary embodiment, in order to ensure the dryness of the collected solids, when the second control strategy is executed, the first solenoid valve 11 is first controlled to open for a preset opening time and then the second solenoid valve 22 is controlled to open.

[0049] Specifically, the solid-liquid separation system in the embodiment of the present application can be applied to multiple fields including medicine, construction, food and chemical industry; it is particularly suitable for solid-liquid separation scenarios such as sewage treatment with recycling value. In the above case, due to the different standards required for the recovery of the solid phase and the recovery of the liquid phase during the solid-liquid separation process, for example, in the case of solid phase recovery, it is necessary to ensure the humidity of the solid to avoid secondary pollution and facilitate storage; while in the case of liquid phase recovery, it is necessary to ensure the turbidity of the separation liquid to avoid low separation purity.

[0050] Furthermore, in the embodiment of the present application, the solid-liquid recovery system is designed to have a storage tank 400 that has both liquid fine phase recovery and solid phase recovery. When liquid phase recovery is required, the first solenoid valve 11 is closed so that the solids remain in the filter tank 300, and since there is no barrier between the separation liquid and the storage tank 400 after separation, the separation liquid directly enters the storage tank 400, so that the storage tank 400 can be used in a targeted manner; when solid phase recovery is required, the second solenoid valve 22 is opened to allow the separation liquid to flow out of the storage tank 400, keeping the storage tank 400 dry, and then the first solenoid valve 11 is opened to allow the solids to fall into the storage tank 400.

[0051] Specifically, based on the solid collection instruction, the first solenoid valve 11 and the second solenoid valve 22 are closed, and the turbidity information is detected by the first turbidity meter 33, so that the turbidity is prevented from not meeting the standard; that is, the first solenoid valve 11 and the second solenoid valve 22 are opened according to the separation liquid collection instruction, and the weight of the solid is judged by collecting the weighing value of the weighing device 500, so that it can be judged whether the moisture content of the solid meets the standard; it should be noted that in the process of solid-liquid separation, since the solid water absorption is close to saturation, the mass of the solid will inevitably decrease when filtering, and since there is no solenoid valve between the separation liquid discharge port and the storage tank, when the delivery pump 200 has pressure, the volume of the solid entering the filter tank 300 remains unchanged, so the mass should be able to be the preset weighing value. If there is a weighing value higher than the preset weighing value, it means that the water content in the solid is relatively high.

[0052] Furthermore, in the process of judging the humidity of the solid, the humidity of the solid can be judged by comparing the mass of the pure solid and the solid in the solid-liquid mixed state through historical data.

[0053] For example, in the solid-liquid separation process of the gypsum powder solution, the gypsum can be filtered through the filter component of the storage tank 400 with a certain pore size. Since the filtered gypsum has recycling value, but the gypsum powder has strong water absorption, it is necessary to judge the humidity of the gypsum fallen off from the filter tank 300 by weighing.

[0054] Furthermore, the humidity of the gypsum can be kept in accordance with a preset humidity by drying the gypsum before it falls off.

[0055] Specifically, the first preset time period is used to control the amount of raw liquid delivered by the delivery pump 200 .

[0056] A solid-liquid separation method provided in an embodiment of the present application can perform solid-liquid separation on a raw liquid based on a raw liquid storage tank 100, a delivery pump 200 and a filter tank 300 connected in sequence; when liquid phase collection is required, the first solenoid valve 11 is closed to allow the separation liquid to naturally flow into the receiving tank 400 through the interface between the filter tank 300 and the receiving tank 400, and after the qualified separation liquid is detected, the second solenoid valve 22 is opened to allow the separation liquid in the receiving tank 400 to pass into the separation liquid collection tank; when solid phase collection is required, the second solenoid valve 22 is opened to allow the solid matter to fall into the receiving tank 400; different collection instructions correspond to different control strategies during the collection process. If the collection instruction is If the instruction for collecting the separation liquid is provided, the first control strategy includes closing the first solenoid valve 11 and the second solenoid valve 22 so that the separation liquid is temporarily stored in the storage tank 400, and judging whether the collected separation liquid is qualified based on the detection result of the turbidity meter 33; if the collection instruction is a solid collection instruction, the second control strategy includes controlling the first solenoid valve 11 and the second solenoid valve 22 to open so that the separation liquid is emptied into the separation liquid collection tank, and judging the humidity of the solid by weighing the mass of the remaining solids, thereby effectively avoiding the technical problem that the target of solid-liquid separation is mostly a single-phase target designed based on demand, and it is impossible to select a liquid or solid target that meets the demand according to the demand during the separation operation.

[0057] In one embodiment, the stock solution storage tank is equipped with a stirring device and a second turbidity meter; the second turbidity meter is configured to float on the surface of the stock solution; the system further comprises: a precipitant delivery device, the feed port of the precipitant delivery device is connected to the stock solution storage tank; Figure 2 As shown, the method further includes the following steps S202 to S204. Among them:

[0058] S202, periodically executing a precipitation strategy; the precipitation strategy includes controlling the precipitant delivery device to deliver the precipitant when the stock solution is left to stand for a second preset time, and controlling the stirring device to stir for a third preset time in a preset stirring method; the preset stirring method includes stirring at a first preset speed during the precipitant delivery process, and stirring at a second preset speed after the precipitant delivery is completed; the second preset speed is greater than the first preset speed.

[0059] Specifically, the precipitation strategy is periodically executed to stir the stock solution, and then to allow the precipitate in the stock solution to precipitate out by standing, and to judge whether the amount of precipitant added is sufficient by the precipitation state of the precipitate. It can be understood that when the amount of precipitant added is sufficient, the turbidity will continue to change until no more precipitate can be precipitated.

[0060] Furthermore, the second preset time length is used to indicate the time length required for preliminarily judging that the turbidity no longer changes after standing. It can be specifically set according to the type of solute contained in the original solution. When the turbidity no longer changes, the precipitant continues to be added and judged again. If the turbidity still does not change, it indicates that the precipitation process is completed.

[0061] Further, the third preset time period is used to indicate the stirring time period required based on the type of solute contained in the stock solution.

[0062] Specifically, during the process of adding the precipitant, stirring needs to be performed at a lower speed to avoid the stirring device blocking the precipitant and to avoid stirring the precipitant onto the side wall of the stock solution storage tank; after the precipitant is added, the stirring speed is increased to a stirring speed corresponding to the type of solute contained in the stock solution so that the precipitant and the stock solution are fully blended.

[0063] Further, the second preset speed is determined by a stirring speed corresponding to the solute type, and no specific limitation is made herein.

[0064] Exemplarily, the solute type may include gypsum.

[0065] S204, in response to the turbidity of the surface of the raw liquid not changing after being left to stand for a second preset time, stopping the precipitation strategy.

[0066] In one embodiment, if Figure 3 As shown, the method further includes the following steps S302 to S306. Among them:

[0067] S302, constructing an association relationship model with the third preset time, the second preset speed and the pressure of the delivery pump as inputs and the turbidity of the separation liquid as outputs, and training the association relationship model based on historical data to obtain a trained association relationship model.

[0068] Specifically, although the stirring time of the third preset time and the stirring speed of the second preset speed can be determined by the solute type, under the condition of a given preset turbidity value of the separation liquid, the third preset time, the second preset speed and the pressure of the delivery pump can be effectively adjusted by establishing a correlation between the third preset time, the second preset speed and the pressure of the delivery pump and the turbidity of the separation liquid, so as to further accurately control the turbidity of the separation liquid. Therefore, when the turbidity of the separation liquid meets the standard, the third preset time, the second preset speed or the pressure of the delivery pump can be reduced to improve the filtration efficiency; or when the turbidity of the separation liquid does not meet the standard, the accuracy of the turbidity of the separation liquid can be improved by adjusting the third preset time, the second preset speed or the pressure of the delivery pump.

[0069] S304, in response to outputting the turbidity exceeding standard prompt information, providing feedback guidance on the third preset time, the second preset speed and the pressure of the delivery pump based on the trained association model until the turbidity of the separation liquid meets the first preset turbidity.

[0070] Specifically, the system operation is made more precise through feedback.

[0071] S306: If the turbidity of the separation liquid still does not meet the first preset turbidity after the feedback guidance, output a prompt message indicating that the pore size of the filter component is unqualified.

[0072] Specifically, if the first preset turbidity still cannot be reached through feedback, it is considered that the pore size of the filter component is unqualified. It can be understood that when the pore size is unqualified, the accuracy of the turbidity of the separated liquid cannot be improved by adjusting the third preset time, the second preset speed or the pressure of the delivery pump. At this time, the staff should be reminded to check.

[0073] In one embodiment, the system further comprises an air pump connected between the delivery pump and the filter tank; Figure 4 As shown, the method further includes the following steps S402 to S410. Among them:

[0074] S402, based on the first mass of the raw liquid delivered by the delivery pump, the second mass of the separated liquid input into the storage tank, and the third mass of the solids input into the storage tank, it is determined whether the solids have been completely removed from the filter tank.

[0075] It is understandable that when the sum of the second mass of the separation liquid input into the storage tank and the third mass of the solids input into the storage tank is not approximately the same as the first mass of the raw liquid delivered by the delivery pump, it indicates that solids are adhered to the filter assembly.

[0076] S404, in response to the mass of the solid matter that has been shed being less than the first preset percentage, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to output normal temperature compressed air of the first preset pressure. The mass of the solid matter that has been shed is represented by the relative mass (i.e., ratio) of the third mass of the solid matter and the first mass of the raw liquid delivered by the delivery pump, and correspondingly, the first preset percentage represents a reasonable ratio of the third mass of the solid matter to the first mass of the raw liquid under the premise of meeting the filtering requirements.

[0077] Specifically, the room temperature compressed air with a first preset pressure is used to increase the pressure in the filter tank, causing slight deformation inside the filter tank, resulting in relative displacement between the solid matter and the tank body of the filter tank.

[0078] It should be noted that the filter assembly inside the filter tank usually includes a filter bag. During the process of pressurizing the compressed air at room temperature with a first preset pressure, even if the filter bag has a mesh structure, it is still easily deformed due to its soft texture.

[0079] S406, in response to the mass of the solids that have been shed being less than the second preset percentage, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to output high-temperature compressed air at a first preset pressure; wherein the first preset percentage is less than the second preset percentage. The second preset percentage is similar to the first preset percentage, and is expressed as a reasonable ratio of the third mass of the solids to the first mass of the stock solution, and the mass of the solids here is also expressed as a relative mass to the stock solution.

[0080] Specifically, high temperature compressed air is used to cause the residual solids to condense into lumps quickly, making them easier to fall off.

[0081] S408, when the air pump outputs the fourth preset time length, control the first solenoid valve to open.

[0082] Specifically, when the first electromagnetic valve is opened, the solid matter will be blown off by the vibration due to the explosion phenomenon.

[0083] S410, if the solid matter has not been completely removed, the air pump is controlled to output compressed air with a preset pulsation frequency; the preset pulsation frequency is the same as the vibration frequency of the filter assembly when compressed air is supplied.

[0084] Specifically, by obtaining the vibration frequency of the filter device such as the filter bag inside the filter component when compressed air is injected, and setting the preset pulsation frequency to be the same as the vibration frequency of the filter component, resonance is formed to increase the amplitude and accelerate the shedding of solids.

[0085] In an exemplary embodiment, the method further comprises the steps of:

[0086] During the process of inputting the separation liquid into the storage tank, if the change rate of the second mass is less than the preset change rate, the filter device cleaning strategy is executed; the filter device cleaning strategy includes: when it is judged that the solid matter is completely removed, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to work alternately at positive and negative pressures at a preset frequency.

[0087] Specifically, by forming a negative pressure, solids that are blocked in the filter assembly due to large particle size or large friction between particles are re-sucked into the filter assembly and discharged again under positive pressure again, thereby achieving cleaning of the filter tank.

[0088] In one embodiment, the method further comprises the steps of:

[0089] In response to outputting a humidity exceeding standard prompt message, the delivery pump and the first solenoid valve are controlled to close, and the air pump is controlled to output compressed air of the second preset pressure according to the fifth preset time duration. The fifth preset time duration is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of original liquid entering the storage tank, and the amount of compressed air of the second preset pressure per unit time.

[0090] Specifically, the water content of the solids that have fallen off can be determined based on the amount of raw liquid entering the storage tank and the weighing value of the weighing device when the solids have fallen off, and the time required to dry the solids to a preset humidity can be determined based on the amount of compressed air as the fifth preset time length.

[0091] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indications of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0092] Based on the same inventive concept, the embodiment of the present application also provides a solid-liquid separation device for implementing the solid-liquid separation method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of a solid-liquid separation device provided below can refer to the limitations of a solid-liquid separation method above, and will not be repeated here.

[0093] In a second aspect, the present application further provides a solid-liquid separation device, which is applied to a solid-liquid separation system; the solid-liquid separation system comprises a raw liquid storage tank, a delivery pump and a filter tank connected in sequence; the filter tank comprises a filter assembly, a solid discharge port and a separation liquid discharge port; the system further comprises: a storage tank connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank connected to the storage tank; a first solenoid valve connected between the solid discharge port and the storage tank; a second solenoid valve connected between the outlet of the storage tank and the separation liquid collection tank; a first turbidity meter, which is arranged at the inner bottom of the storage tank; a weighing device, wherein the weighing part of the weighing device is in contact with and connected to the storage tank; the device comprises:

[0094] A control module, in response to receiving a filtering instruction, controls the delivery pump to start for a first preset time, and delivers the target raw liquid in the raw liquid storage tank to the filtering tank for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction;

[0095] When the filtering instruction is a separation liquid collection instruction, the first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidity meter, and outputting a turbidity exceeding standard prompt information when the turbidity of the separation liquid exceeds the first preset turbidity, otherwise controlling the second solenoid valve to be opened;

[0096] When the filtering instruction is a solid collection instruction, the second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve and the second solenoid valve to open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt information when the weighing value is higher than the preset weighing value.

[0097] In a third aspect, the present application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of a solid-liquid separation method as described above are implemented.

[0098] In a fourth aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of a solid-liquid separation method as described above when the computer program is executed by a processor.

[0099] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of a solid-liquid separation method as described above.

[0100] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0101] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A solid-liquid separation method, characterized in that: Applicable to a solid-liquid separation system; the solid-liquid separation system comprises a raw liquid storage tank, a delivery pump and a filter tank connected in sequence; the filter tank comprises a filter assembly, a solid discharge port and a separation liquid discharge port; the system further comprises: a storage tank connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank connected to the storage tank; a first solenoid valve connected between the solid discharge port and the storage tank; a second solenoid valve connected between the outlet of the storage tank and the separation liquid collection tank; a first turbidity meter arranged at the inner bottom of the storage tank; a weighing device, wherein the weighing part of the weighing device is in contact with and connected to the storage tank; the method comprises: In response to receiving a filtering instruction, controlling the delivery pump to start for a first preset time to fluidize the target raw liquid in the raw liquid storage tank into the filtering tank for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction; In the case where the filtering instruction is a separation liquid collection instruction, a first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidity meter, and outputting a turbidity exceeding standard prompt message when the turbidity of the separation liquid exceeds a first preset turbidity, otherwise controlling the second solenoid valve to be opened; When the filtering instruction is a solid collection instruction, a second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve and the second solenoid valve to open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt information when the weighing value is higher than a preset weighing value.

2. The method according to claim 1, characterized in that The stock solution storage tank is equipped with a stirring device and a second turbidity meter; the second turbidity meter is configured to float on the surface of the stock solution; The system further comprises: a precipitant delivery device, wherein a feeding port of the precipitant delivery device is connected to the stock solution storage tank; and the method further comprises: The precipitation strategy is executed periodically; the precipitation strategy includes controlling the precipitant delivery device to deliver the precipitant when the stock solution is left to stand for a second preset time, and controlling the stirring device to stir for a third preset time in a preset stirring mode; the preset stirring mode includes stirring at a first preset speed during the delivery of the precipitant, and stirring at a second preset speed after the delivery of the precipitant is completed; the second preset speed is greater than the first preset speed; In response to the turbidity of the surface of the raw liquid not changing after standing for the second preset time period, the precipitation strategy is stopped.

3. The method according to claim 2, characterized in that The method further comprises: Constructing an association relationship model with the third preset time, the second preset speed, and the pressure of the delivery pump as inputs and the turbidity of the separation liquid as output, and training the association relationship model based on historical data to obtain a trained association relationship model; In response to outputting the turbidity exceeding standard prompt information, providing feedback guidance on the third preset time, the second preset speed and the pressure of the delivery pump based on the trained association model until the turbidity of the separation liquid meets the first preset turbidity; If the turbidity of the separation liquid still does not meet the first preset turbidity after the feedback guidance, a prompt message indicating that the pore size of the filter component is unqualified is output.

4. The method according to claim 2, characterized in that: The system further includes an air pump; the air pump is connected between the delivery pump and the filter tank; the method further includes: Determine the mass of the solids removed from the filter tank based on a first mass of the raw liquid delivered by the delivery pump, a second mass of the separated liquid delivered to the storage tank, and a third mass of the solids delivered to the storage tank; In response to the mass of the solid matter that has been completely detached being less than a first preset percentage, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to output normal temperature compressed air with a first preset pressure; In response to the mass of the solid matter that has been shed being less than a second preset percentage, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to output high-temperature compressed air of a first preset pressure; wherein the first preset percentage is less than the second preset percentage; When the air pump outputs a fourth preset time, controlling the first solenoid valve to open; If the solid matter has not completely fallen off, the air pump is controlled to output compressed air with a preset pulsation frequency; the preset pulsation frequency is the same as the vibration frequency of the filter component when the compressed air is supplied.

5. The method according to claim 4, characterized in that The method further comprises: During the process of inputting the separation liquid into the storage tank, if the change rate of the second mass is less than the preset change rate, the filter device cleaning strategy is executed; the filter device cleaning strategy includes: when it is judged that the solid matter is completely detached, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to perform alternating positive and negative pressure operations at a preset frequency.

6. The method according to claim 4, characterized in that The method further comprises: In response to outputting the humidity exceeding the standard prompt information, the delivery pump and the first solenoid valve are controlled to be closed, and the air pump is controlled to output compressed air of the second preset pressure according to the fifth preset time duration, and the fifth preset time duration is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of original liquid entering the storage tank, and the amount of compressed air of the second preset pressure per unit time.

7. A solid-liquid separation device, characterized in that: Applicable to a solid-liquid separation system; the solid-liquid separation system comprises a raw liquid storage tank, a delivery pump and a filter tank connected in sequence; the filter tank comprises a filter assembly, a solid discharge port and a separation liquid discharge port; the system further comprises: a storage tank connected to the solid discharge port and the separation liquid discharge port; a separation liquid collection tank connected to the storage tank; a first solenoid valve connected between the solid discharge port and the storage tank; a second solenoid valve connected between the outlet of the storage tank and the separation liquid collection tank; a first turbidity meter arranged at the inner bottom of the storage tank; a weighing device, the weighing part of the weighing device is in contact with the storage tank; the device comprises: A control module, in response to receiving a filtering instruction, controls the delivery pump to start for a first preset time to fluidize the target raw liquid in the raw liquid storage tank into the filtering tank for solid-liquid separation; the filtering instruction includes a solid collection instruction and a separation liquid collection instruction; In the case where the filtering instruction is a separation liquid collection instruction, a first control strategy is executed to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidity meter, and outputting a turbidity exceeding standard prompt message when the turbidity of the separation liquid exceeds a first preset turbidity, otherwise controlling the second solenoid valve to be opened; When the filtering instruction is a solid collection instruction, a second control strategy is executed to collect solids; the second control strategy includes: controlling the first solenoid valve and the second solenoid valve to open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt information when the weighing value is higher than a preset weighing value.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images