Solid-liquid separation method and device

Abstract

The present application relates to the technical field of solid-liquid separation, and in particular to a solid-liquid separation method and device. The method comprises: when the filtration instruction is a separation liquid collection instruction, executing a first control strategy including: controlling the first solenoid valve and the second solenoid valve to be closed, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 filtration instruction is a solid matter collection instruction, executing a second control strategy including: controlling the first solenoid valve and the second solenoid valve to be open, collecting the weighing value of the weighing device, and outputting a humidity exceeding standard prompt message when the weighing value is higher than the preset weighing value, which can effectively avoid the technical problem that the target of solid-liquid separation is mostly a one-way target designed based on demand, and it is impossible to select and obtain the liquid phase or solid phase target that meets the demand as needed during the separation operation.

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 is the process of separating solid particles from the liquid in a solid-liquid mixture. This is crucial in many fields because it allows for the recovery of valuable solid and liquid phases, while also reducing the burden on subsequent treatment processes, improving efficiency and product quality. Solid-liquid separation is an essential step in industries such as wastewater 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 as needed 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 includes a raw liquid storage tank, a delivery pump, and a filter tank connected in sequence; the filter tank includes a filter assembly, a solid discharge port, and a separation liquid discharge port; the system also includes: 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; and a weighing device, wherein a weighing portion of the weighing device is in contact with 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 period to pressurize 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 filtration instruction is a separation liquid collection instruction, executing a first control strategy to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to close, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 open;

[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 raw liquid 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 raw liquid; the system further includes: a precipitant feeding device, the feeding port of the precipitant feeding device is connected to the raw liquid storage tank; the method further includes:

[0010] The precipitation strategy is executed periodically; the precipitation strategy includes controlling the precipitant feeding device to feed 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 according to a preset stirring method; the preset stirring method includes stirring at a first preset speed during the precipitant feeding process, and stirring at a second preset speed after the precipitant feeding 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 the raw liquid is left to stand for the second preset time period, the precipitation strategy is stopped.

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

[0013] 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 separated liquid as output, and training the association relationship model based on historical data to obtain a trained association relationship model;

[0014] In response to outputting a turbidity exceeding standard prompt message, 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 separated 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 is performed, a prompt message indicating that the pore size of the filter component is unqualified is output.

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

[0017] Determining 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 input to the storage tank, and a third mass of the solids input 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 compressed air at room temperature at a first preset pressure;

[0019] In response to the mass of the solid matter that has been detached being less than a 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;

[0020] When the air pump outputs a fourth preset time, 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 pulsating frequency; the preset pulsating frequency is the same as the vibration frequency of the filter assembly 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 shedding is completed, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to operate alternately at positive and negative pressures according to 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. The fifth preset time is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of raw 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 includes a raw liquid storage tank, a delivery pump, and a filter tank connected in sequence; the filter tank includes a filter assembly, a solid discharge port, and a separation liquid discharge port; the system also includes: 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 the weighing portion of the weighing device is in contact with the storage tank; the device includes:

[0027] a control module configured to, in response to receiving a filtering instruction, control a delivery pump to operate for a first preset duration to pressurize a target raw liquid in the raw liquid storage tank into a filtering tank for solid-liquid separation; the filtering instruction including a solid collection instruction and a separation liquid collection instruction;

[0028] When the filtration instruction is a separation liquid collection instruction, executing a first control strategy to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to close, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 open;

[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 comprising 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, comprising 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, delivery pump and 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 tested, 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; different collection instructions correspond to different control strategies during the collection process. 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 results 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 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 and obtain the liquid or solid phase target that meets the demand as needed 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 related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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 any creative work.

[0035] Figure 1 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 figure is a flow chart of the steps for controlling the shedding of solids in one embodiment. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two elements, or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on 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 intervening 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 disposed at the inner bottom of the storage tank 400; a weighing device 500, wherein the weighing portion of the weighing device 500 is in contact with the storage tank 400; and 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 period 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 filtration 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 message when the turbidity of the separation liquid exceeds a 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, 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 especially 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 an embodiment of the present application, the solid-liquid recovery system is designed to have a storage tank 400 that is capable of 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. 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 turbidimeter 33, so that the turbidity is prevented from being substandard; that is, based on the separation liquid collection instruction, the first solenoid valve 11 and the second solenoid valve 22 are opened, and the solid weight is judged by collecting the weighing value of the weighing device 500, so that it can be judged whether the solid moisture 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 quality 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 high.

[0052] Furthermore, in the process of determining the moisture content of the solid, the moisture content of the solid can be determined by comparing the mass of the solid in a pure state with the mass of the solid in a solid-liquid mixed state through historical data.

[0053] For example, during 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 falling 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] The embodiment of the present application provides a solid-liquid separation method, which can perform solid-liquid separation on the raw liquid based on the raw liquid storage tank 100, the delivery pump 200 and the 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 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 and obtain the liquid or solid target that meets the demand according to the need during the separation operation.

[0057] In one embodiment, the raw liquid 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 raw liquid; the system further comprises: a precipitant feeding device, the feeding port of the precipitant feeding device is connected to the raw liquid storage tank; Figure 2 As shown, the method further includes the following steps S202 to S204.

[0058] S202, periodically executing the precipitation strategy; the precipitation strategy includes controlling the precipitant delivery device to deliver the precipitant when the original liquid is left to stand for a second preset time, and controlling the stirring device to stir for a third preset time according to 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 executed periodically to stir the original solution, and then allow the precipitate in the original solution to precipitate out by standing, and the precipitation state of the precipitate is used to judge whether the amount of precipitant added is sufficient. 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 the preliminary judgment 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 is continued to be added and judged again. If the turbidity still does not change, it indicates that the precipitation process is completed.

[0061] Furthermore, the third preset time period is used to indicate a 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 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] Furthermore, the second preset speed is determined by the stirring speed corresponding to the solute type, which is not specifically limited herein.

[0064] Illustratively, 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 the second preset time, stopping the precipitation strategy.

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

[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 output, 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, given a preset value of the turbidity 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, feedback is provided to make the system run more accurately.

[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 achieved through feedback, it is considered that the aperture of the filter component is unqualified. It can be understood that when the aperture 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 a first mass of the raw liquid delivered by the delivery pump, a second mass of the separated liquid input into the storage tank, and a 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 can be understood 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] In step S404, in response to the mass of the detached solids being less than a first preset percentage, the delivery pump and the first solenoid valve are controlled to remain closed, and the air pump is controlled to deliver room-temperature compressed air at a first preset pressure. The mass of the detached solids is represented by the relative mass (i.e., ratio) of the third mass of the solids to the first mass of the raw liquid delivered by the delivery pump. Accordingly, the first preset percentage represents a reasonable ratio of the third mass of the solids to the first mass of the raw liquid while meeting filtration requirements.

[0077] Specifically, the room temperature compressed air of the 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 pressurization process of the first preset pressure of room temperature compressed air, even if the filter bag has a mesh structure, it is still easy to deform due to its soft texture.

[0079] In step S406, in response to the mass of the detached solids 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 deliver 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, similar to the first preset percentage, is expressed as a reasonable ratio of the third mass of the solids to the first mass of the stock solution. Here, the mass of the solids is also expressed relative to the stock solution.

[0080] Specifically, the high-temperature compressed air is used to rapidly condense the residual solids into lumps, which are then more easily removed.

[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, an explosion vibration phenomenon will occur, causing the solid matter to be blown off by vibration.

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

[0084] Specifically, by obtaining the vibration frequency of the filter device inside the filter component, such as the filter bag, 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 shedding is completed, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to operate alternately at positive and negative pressures according to a preset frequency.

[0087] Specifically, by forming a negative pressure, solid matter that is blocked in the filter assembly due to large particle size or large friction between particles is re-sucked into the filter assembly and discharged again when positive pressure is restored, thereby cleaning 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. The fifth preset time is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of raw 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 fall off, and the time required to dry the solids to the preset humidity can be determined based on the amount of compressed air as the fifth preset time.

[0091] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, 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 portion of the steps in the flowcharts of 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. The order of execution 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 portion of the steps or stages in other steps.

[0092] Based on the same inventive concept, the present application also provides a solid-liquid separation device for implementing the aforementioned solid-liquid separation method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the solid-liquid separation device provided below can be found in the above-mentioned limitations of the solid-liquid separation method 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 includes a raw liquid storage tank, a delivery pump, and a filter tank connected in sequence; the filter tank includes a filter assembly, a solid discharge port, and a separation liquid discharge port; the system also includes: 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 the weighing portion of the weighing device is in contact with the storage tank; the device includes:

[0094] a control module configured to, in response to receiving a filtering instruction, control a delivery pump to operate for a first preset duration to pressurize a target raw liquid in the raw liquid storage tank into a filtering tank for solid-liquid separation; the filtering instruction including a solid collection instruction and a separation liquid collection instruction;

[0095] When the filtration instruction is a separation liquid collection instruction, executing a first control strategy to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to close, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 open;

[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 comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the 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 the 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, comprising 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 will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented 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 memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of 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 the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0101] The technical features of the above embodiments can 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 merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A solid-liquid separation method, characterized in that: Applicable to a solid-liquid separation system; the solid-liquid separation system includes a raw liquid storage tank, a delivery pump, and a filter tank connected in sequence; the filter tank includes a filter assembly, a solid discharge port, and a separation liquid discharge port; the system also includes: 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 turbidimeter disposed at the inner bottom of the storage tank; a weighing device, wherein the weighing portion of the weighing device is in contact with the storage tank; the method includes: In response to receiving a filtering instruction, controlling the delivery pump to start for a first preset time period to hydraulically deliver 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; When the filtering instruction is a separation liquid collection instruction, executing a first control strategy to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to close, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 open; When the filtering instruction is a solid collection instruction, executing a second control strategy 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 message when the weighing value is higher than a preset weighing value; The raw liquid 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 raw liquid; the system further comprises: a precipitant feeding device, the feeding port of the precipitant feeding device is connected to the raw liquid storage tank; the method further comprises: Periodically executing a precipitation strategy; the precipitation strategy includes controlling the precipitant-dosing device to dosing 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 manner; the preset stirring manner includes stirring at a first preset speed during the precipitant dosing process, and stirring at a second preset speed after the precipitant dosing 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 the second preset time period, the precipitation strategy is stopped.

2. The method according to claim 1, characterized in that The method further comprises: Constructing an association relationship model with the third preset duration, 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 is performed, a prompt message indicating that the pore size of the filter component is unqualified is output.

3. The method according to claim 1, characterized in that The system further includes an air pump connected between the delivery pump and the filter tank; the method further includes: determining 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 input into the storage tank, and a third mass of the solids input into the storage tank; In response to the mass of the solid matter after shedding 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 compressed air at room temperature with a first preset pressure; In response to the mass of the solid matter that has been completely detached being less than a 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; When the air pump outputs a fourth preset time, controlling the first solenoid valve to open; If the solid matter has not been completely removed, the air pump is controlled to output compressed air with a preset pulsating frequency; the preset pulsating frequency is the same as the vibration frequency of the filter assembly when the compressed air is supplied.

4. The method according to claim 3, 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 removed, controlling the delivery pump and the first solenoid valve to remain closed, and controlling the air pump to operate alternately at positive and negative pressures according to a preset frequency.

5. The method according to claim 3, 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. The fifth preset time is determined based on the weighing value of the weighing device when the solid matter falls off, the amount of raw liquid entering the storage tank, and the amount of compressed air of the second preset pressure per unit time.

6. A solid-liquid separation device, implemented based on the method according to any one of claims 1 to 5, characterized in that: Applicable to a solid-liquid separation system; the solid-liquid separation system includes a raw liquid storage tank, a delivery pump, and a filter tank connected in sequence; the filter tank includes a filter assembly, a solid discharge port, and a separation liquid discharge port; the system also includes: 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 the weighing portion of the weighing device is in contact with the storage tank; the device includes: a control module configured to, in response to receiving a filtering instruction, control the delivery pump to start for a first preset duration, and hydraulically deliver the target raw liquid in the raw liquid storage tank to the filtering tank for solid-liquid separation; the filtering instruction including a solid collection instruction and a separation liquid collection instruction; When the filtering instruction is a separation liquid collection instruction, executing a first control strategy to collect the separation liquid; the first control strategy includes: controlling the first solenoid valve and the second solenoid valve to close, collecting the turbidity of the separation liquid detected by the first turbidimeter, 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 open; 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.

7. 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 5 are implemented.

8. 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 5 are implemented.

9. 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 5 are implemented.

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