Inorganic salt wastewater treatment device and treatment method

Abstract

The present invention discloses an inorganic salt wastewater treatment device and a treatment method. The device includes: a box body, the interior of the box body includes a liquid storage tank for accommodating the wastewater to be treated, so that the wastewater to be treated evaporates and inorganic salts are precipitated; a vacuum adjustment unit, including a vacuum gauge and an adjustment valve, arranged on the box body, for displaying the vacuum degree and making the pressure value inside and outside the box body the same; a first pipeline, the wastewater to be treated flows into the liquid storage tank through the first pipeline; the inlet sequence of the wastewater to be treated is determined based on system parameters; a second pipeline, steam enters the liquid storage tank through the second pipeline to form steam condensate and evaporation gas; a tubular heat exchanger, the tubular heat exchanger is connected to the interior of the box body to receive the evaporation gas; a vacuum pump group, the vacuum pump group is connected to the tubular heat exchanger to provide the required vacuum degree for the interior of the box body. In the present invention, the inlet water of the treatment device is regulated. By optimizing and controlling the inlet water timing and the inlet water volume, the influence of vacuum fluctuation on the precipitation of inorganic salts is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and more specifically, relates to a device and a treatment method for treating inorganic salt wastewater. Background Art

[0002] In the prior art, for the treatment of inorganic salt wastewater, most utilize the characteristics that the boiling point of the liquid is low and it is easy to evaporate under vacuum conditions. The inorganic salt wastewater is collected, heated, and evaporated to obtain solid inorganic salts, and the evaporated water is collected through a vacuum system and discharged into a transfer tank for treatment.

[0003] When the concentration of inorganic salts in water is relatively high, the evaporation rate of water in the solution is easily affected by the concentration of inorganic salts. Specifically, it can be manifested as: as the salt concentration increases, the boiling point of the solution gradually rises; and the vacuum condition also affects the boiling point of water, causing the evaporation rate of water to fluctuate, which in turn leads to local pressure fluctuations in the inorganic salt wastewater treatment device, resulting in unstable vacuum degree, affecting the precipitation of inorganic salt crystals, and making the subsequent recovery of inorganic salt crystals complicated. Summary of the Invention

[0004] To solve the deficiencies in the prior art, the purpose of the present invention is to address the above-mentioned defects and further propose a method for treating inorganic salt wastewater.

[0005] The present invention adopts the following technical solutions:

[0006] The present invention discloses, in a first aspect, a device for treating inorganic salt wastewater, the device comprising:

[0007] A box body, the interior of the box body includes a liquid storage tank; the liquid storage tank is used to hold the wastewater to be treated, so that the water in the wastewater to be treated evaporates and inorganic salt crystals precipitate;

[0008] A vacuum adjustment unit, including a vacuum gauge and a vacuum adjustment valve, the vacuum gauge and the adjustment valve are arranged on the box body, the vacuum gauge is used to display the vacuum degree inside the box body, and the vacuum adjustment valve is used to keep the pressure value inside the box body the same as that of the external environment;

[0009] A first pipeline, the first pipeline is connected to one end of the liquid storage tank, and the wastewater to be treated flows into the liquid storage tank through the first pipeline; the inlet sequence of the wastewater to be treated is determined based on system parameters;

[0010] A second pipeline, the second pipeline is connected to the other end of the liquid storage tank, steam enters the liquid storage tank through the second pipeline, and together with the wastewater to be treated, forms steam condensate and evaporation gas;

[0011] A tubular heat exchanger, which is connected to the interior of the box through the second pipeline to receive the evaporation gas;

[0012] A vacuum pump group, which is connected to the tubular heat exchanger and is used to provide the required vacuum degree for the interior of the box.

[0013] In some possible embodiments, the device further includes a third pipeline;

[0014] The third pipeline is respectively connected to the vacuum pump group and the tubular heat exchanger, and is used to cooperate with the tubular heat exchanger to cool the evaporation gas, and is used to cooperate with the vacuum pump group to cool the steam condensate.

[0015] In some possible embodiments, the number of the liquid storage tanks is at least one;

[0016] The second pipeline is connected to one end of each liquid storage tank through a metal hose, so that the steam condensate is discharged through the second pipeline.

[0017] In some possible embodiments, the inorganic salt wastewater treatment device is also externally connected to a sewage pool through the box.

[0018] In some possible embodiments, the inorganic salt wastewater treatment device further includes a temperature sensor, a vacuum degree sensor, a liquid level sensor and a concentration sensor; the system parameters include temperature parameters, vacuum degree parameters, liquid level height and concentration parameters;

[0019] The temperature sensor is used to obtain the temperature parameter; the vacuum degree sensor is used to obtain the vacuum degree parameter;

[0020] The liquid level sensor is used to obtain the liquid level height; the concentration sensor is used to obtain the concentration parameter.

[0021] A second aspect of the present invention discloses a method for treating inorganic salt wastewater, which is applied to the inorganic salt wastewater treatment device described in any one of the above, and the method includes:

[0022] Input the wastewater to be treated into the liquid storage tank through the first pipeline, and input the steam into the liquid storage tank through the second pipeline; wherein, the steam is used to provide a high-temperature environment for the interior of the box; the inlet sequence of the wastewater to be treated is determined based on the system parameters;

[0023] When the vacuum degree and temperature inside the box reach the preset reaction threshold, the water in the wastewater to be treated evaporates to form steam condensate and inorganic salt crystals are precipitated;

[0024] The steam condensate is discharged after being cooled by the condensation cooling liquid in the third pipeline.

[0025] In some possible embodiments, the method further includes:

[0026] Obtaining a solubility calculation formula; the solubility calculation formula is based on temperature parameters and vacuum parameters;

[0027] Obtaining initial concentration parameters and initial wastewater volume of the wastewater to be treated;

[0028] Determining the liquid level height corresponding to the liquid to be treated based on the solubility calculation formula, the initial concentration parameter and the initial wastewater volume;

[0029] The water inflow corresponding to the liquid to be treated is determined based on the liquid level height.

[0030] In some possible embodiments, the method further includes:

[0031] Obtain historical vacuum parameters, historical temperature parameters, historical liquid level heights, and historical concentration parameters corresponding to the inorganic salt wastewater treatment device in multiple historical treatment processes;

[0032] Normalizing the historical vacuum degree parameter, the historical temperature parameter, the historical liquid level height, and the historical concentration parameter to obtain a target processing parameter;

[0033] Inputting the target processing parameters into a convolutional neural network to obtain a mapping relationship to be optimized between the target processing parameters and a preset water inlet sequence;

[0034] Iterate the mapping relationship to be optimized based on the loss function to obtain a target water inflow sequence; the target water inflow sequence includes target liquid level heights corresponding to multiple water inflows;

[0035] The target water inflow volume of the wastewater to be treated corresponding to different water inflow times is determined based on the target liquid level height.

[0036] In some possible embodiments, the convolutional neural network includes a convolutional layer, a pooling layer, and a fully connected layer;

[0037] The step of inputting the target processing parameters into a convolutional neural network to obtain a mapping relationship to be optimized includes:

[0038] Based on the convolution layer and the pooling layer, extracting the temporal features corresponding to the target processing parameters;

[0039] Based on the fully connected layer, the mapping relationship to be optimized between the timing characteristics and the preset water inlet sequence is established.

[0040] In the third aspect of the present invention, an electronic device is disclosed. The device includes a processor and a memory. At least one instruction and at least one program segment are stored in the memory. The at least one instruction and the at least one program segment are loaded and executed by the processor to implement the inorganic salt wastewater treatment method as described above.

[0041] In the fourth aspect of the present invention, a computer storage medium is provided. At least one instruction and at least one program segment are stored in the computer storage medium. The at least one instruction and the at least one program segment are loaded and executed by a processor to implement the inorganic salt wastewater treatment method as described above.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] In the present invention, the water inlet of the inorganic salt wastewater treatment device is regulated. By optimizing and controlling the water inlet timing and water inlet volume, the influence of vacuum fluctuations, solution concentration, etc. on the precipitation of solid inorganic salts is reduced, and thus the difficulty of recovering inorganic salt crystals can be reduced. By obtaining historical data, such as data on vacuum degree, sensor information, etc., a matching model is determined, and then the model is used to optimize the water inlet timing and water inlet volume so that the water inlet timing and water inlet volume can match the system operation state, thereby reducing the fluctuation of the vacuum degree, improving the stability of the inorganic salt wastewater treatment device, ensuring the uniform precipitation of inorganic salt crystals, and being able to reduce the failure probability of the inorganic salt wastewater treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic structural diagram corresponding to the inorganic salt wastewater treatment device provided by an embodiment of the present invention;

[0045] Figure 2 is a schematic flowchart corresponding to the inorganic salt wastewater treatment method provided by an embodiment of the present invention;

[0046] Figure 3 is a schematic flowchart corresponding to the determination of the water inlet volume;

[0047] Figure 4 is a schematic flowchart corresponding to the determination of the target water inlet volume;

[0048] Figure 5 is a schematic flowchart corresponding to the determination of the mapping relationship to be optimized. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] Next, the technical solutions in the embodiments of this specification will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0051] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0052] The special term "exemplary" herein means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" herein does not have to be construed as superior to or better than other embodiments.

[0053] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" in this article means any one of a plurality or any combination of at least two of a plurality. For example, including at least one of A, B, and C can represent any one or more elements selected from the set composed of A, B, and C.

[0054] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present disclosure can also be implemented without some specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art are not described in detail so as to highlight the gist of the present disclosure.

[0055] In a vacuum state, due to the decrease in the boiling point of water, the evaporation rate of water is different from that under normal pressure. This affects the kinetics of the evaporation process. Especially when the concentration of inorganic salts in the solution is high, the evaporation rate of water in the solution is extremely susceptible to the influence of the inorganic salt concentration. This influence is called the boiling point elevation phenomenon of the solution in the chemical field. As the concentration of the inorganic salt solution increases, its boiling point gradually rises, while the overall boiling point of water under vacuum conditions decreases, and the evaporation in the local concentration area becomes slower. With the fluctuation of the water evaporation rate, local pressure fluctuations in the device will be triggered. These fluctuations will lead to instability of the vacuum degree, that is, vacuum fluctuations. During the evaporation process, vacuum fluctuations may cause local temperature or pressure changes, which will affect the precipitation rate and crystal structure of inorganic salts in the evaporator. Although the goal of separating water and inorganic salts can still be achieved, these pressure fluctuations may cause uneven growth of inorganic salt crystals, forming larger or more irregular crystals (mainly including sodium chloride and calcium sulfate. The uneven crystallization rate of sodium chloride results in over-sized or irregular crystal particles, making subsequent processing (such as crushing or cleaning) more complicated; the uneven crystallization rate of calcium sulfate easily forms larger crystals or irregular shapes, and the uneven precipitation of calcium sulfate crystals will accelerate fouling on the equipment surface, and these crystals will be harder and difficult to remove), thus affecting the subsequent solid recovery and cleaning process.

[0056] Therefore, to solve the above problems, reduce the pressure fluctuations of the inorganic salt wastewater treatment device, and thus achieve uniform precipitation of inorganic salt crystals, the inorganic salt wastewater treatment device disclosed in the present invention dynamically monitors and regulates the water inlet timing, water inflow volume, etc. of the wastewater, so that the water inflow volume and water inlet timing can meet the operating state of the inorganic salt wastewater treatment device, thereby ensuring uniform precipitation of inorganic salts and reducing the probability of equipment failures.

[0057] Figure 1 It is a schematic structural diagram corresponding to the inorganic salt wastewater treatment device provided by an embodiment of the present invention; as Figure 1 shown, the structure of the inorganic salt wastewater treatment device may include:

[0058] A box body, the interior of the box body includes a liquid storage tank; the liquid storage tank is used to hold the wastewater to be treated, so that the water in the wastewater to be treated evaporates and inorganic salt crystals are precipitated;

[0059] A vacuum adjustment unit, including a vacuum gauge and a vacuum adjustment valve, the vacuum gauge and the adjustment valve are arranged on the box body, the vacuum gauge is used to display the vacuum degree inside the box body, and the vacuum adjustment valve is used to keep the pressure value inside the box body the same as that of the external environment;

[0060] The first pipeline, which is connected to one end of the liquid storage tank, and the wastewater to be treated flows into the liquid storage tank through the first pipeline; the inlet sequence of the wastewater to be treated is determined based on system parameters;

[0061] The second pipeline, which is connected to the other end of the liquid storage tank, and steam enters the liquid storage tank through the second pipeline and forms steam condensate and evaporation gas together with the wastewater to be treated;

[0062] The tubular heat exchanger, which is connected to the inside of the box body through the second pipeline to receive the evaporation gas;

[0063] The vacuum pump group, which is connected to the tubular heat exchanger and is used to provide the required vacuum degree inside the box body.

[0064] In a specific embodiment, the working principle of the inorganic salt wastewater treatment device can be: utilizing the characteristics that the boiling point of liquid is low and it is easy to evaporate under vacuum conditions, collecting, heating, and evaporating the inorganic salt wastewater to obtain solid inorganic salts, and at the same time, the evaporated water is collected through the vacuum system and discharged into the transfer pool for treatment.

[0065] Specifically, the wastewater to be treated can be wastewater containing various inorganic salts. The various inorganic salts usually can include sodium chloride (i.e., NaCl), sodium carbonate (i.e., Na2CO3), calcium sulfate (i.e., CaSO4), potassium nitrate (i.e., KNO3), and magnesium sulfate (MgSO4), etc.; the box body can include a liquid storage tank for accommodating the wastewater to be treated, and each liquid storage tank can be used to accommodate the wastewater to be treated, and high-temperature evaporation of the wastewater to be treated can be realized in the liquid storage tank, and inorganic salt crystals can be precipitated.

[0066] For the precipitation of various inorganic salts, the temperature and vacuum degree ranges are shown in Table 1:

[0067]

[0068] Table 1 Precipitation temperature and vacuum degree of various inorganic salts

[0069] The inorganic salt wastewater treatment device also includes a vacuum adjustment unit. Specifically, the vacuum adjustment unit can include a vacuum adjustment valve and a vacuum gauge. The vacuum gauge is used to display the vacuum degree parameter in the treatment device. The vacuum degree parameter can be the pressure inside the box body. The vacuum adjustment valve can be used to open when the treatment device stops working or when the wastewater to be treated is injected into the box body through the first pipeline, so that the air pressure inside the box body and outside the box body is the same and the conventional atmospheric pressure is maintained.

[0070] The first pipeline can be Figure 1The pipeline corresponding to the medium purple line. The first pipeline can be used to receive the wastewater to be treated. The wastewater to be treated is injected into the interior of the box through an input end of the first pipeline. The first pipeline can also have multiple output ends, and the number of output ends of the first pipeline is greater than the number of liquid storage tanks. Each liquid storage tank corresponds to an output end of the first pipeline, so that the wastewater to be treated can be injected into the liquid storage tank.

[0071] The second pipeline can be Figure 1 The pipeline corresponding to the medium red line. The second pipeline can be used to receive high-temperature steam. The high-temperature steam is injected into the interior of the box through an input end of the second pipeline, so that the interior of the box is in a high-temperature environment. The steam can be generated by a heating system. The steam is usually injected into the interior of the box at the same time as the wastewater to be treated. The second pipeline can also have multiple output ends, and the number of output ends of the second pipeline is greater than the number of liquid storage tanks. Each liquid storage tank corresponds to an output end of the second pipeline, so that the high-temperature steam can reach each liquid storage tank and provide a high-temperature environment for the evaporation of water in the wastewater to be treated.

[0072] Specifically, the number of the liquid storage tanks is at least one;

[0073] One end of each liquid storage tank is connected to the second pipeline through a metal hose, so that the steam condensate is discharged through the second pipeline.

[0074] In a specific embodiment, the number of liquid storage tanks can be one or more. To improve the efficiency of precipitating inorganic salts from the wastewater to be treated, multiple liquid storage tanks can be arranged inside the box. For the same volume of wastewater to be treated, flowing through multiple liquid storage tanks can increase the heat-receiving surface area of the wastewater to be treated, thereby improving the water evaporation efficiency of the wastewater to be treated. The evaporated water becomes steam condensate and is discharged from the liquid storage tank through a metal hose and then discharged after flowing through the second pipeline. The whole device is made of stainless steel, which can prevent corrosion.

[0075] Furthermore, the device further includes a third pipeline;

[0076] The third pipeline is respectively connected to the vacuum pump group and the tubular heat exchanger, and is used to cooperate with the tubular heat exchanger to cool the evaporation gas, and is used to cooperate with the vacuum pump group to cool the steam condensate.

[0077] The third pipeline is Figure 1 The passage corresponding to the medium green line. For the third pipeline connected to the tubular heat exchanger, cooling water for cooling the evaporation gas flows through it. The evaporation gas shown in Figure 1 is cooled by the cooling water, thereby ensuring that the working environment of the vacuum pump is in a suitable and temperature working state to improve the working efficiency of the vacuum pump group.

[0078] The vacuum pump set is used to provide the vacuum degree required for treating the wastewater to be treated inside the box body, that is, to provide the required pressure. For the third pipeline connected to the vacuum pump set, the internal flow passes through the condensation coolant used to cool the steam condensate. After the wastewater to be treated is subjected to high-temperature treatment, inorganic salt crystals precipitate, the water evaporates and condenses into a liquid to obtain steam condensate. After the steam condensate is cooled by the condensation coolant, it is discharged through the second pipeline.

[0079] Furthermore, the inorganic salt wastewater treatment device is also externally connected to a sewage pool through the box body.

[0080] In a specific embodiment, as Figure 1 shown, in the treatment device, the bottom of the box body is also externally connected to a sewage pool; during the evaporation process, if the sewage in the evaporation pan boils, it will flow to the bottom of the box body. When the wastewater to be treated enters or after the treatment device stops running, the bottom drain valve automatically opens, and the sewage flows into the sewage pool for secondary collection and treatment.

[0081] In addition, the inorganic salt wastewater treatment device may further include multiple sensors, such as a temperature sensor, a vacuum degree sensor, a liquid level sensor, and a concentration sensor; the system parameters include temperature parameters, vacuum degree parameters, liquid level height, and concentration parameters;

[0082] The temperature sensor is used to obtain the temperature parameters; the vacuum degree sensor is used to obtain the vacuum degree parameters;

[0083] The liquid level sensor is used to obtain the liquid level height; the concentration sensor is used to obtain the concentration parameters.

[0084] In a specific embodiment, the concentration parameter may be the concentration of the wastewater to be treated; the liquid level height may be the liquid level height of the wastewater to be treated in the treatment device; the above four parameters can be regarded as system parameters for adjusting the water inflow rate and the water inlet timing.

[0085] The above sensors are not shown in Figure 1 but their exemplary position settings can be given. For example, the vacuum degree sensor can be set near the vacuum gauge or near the vacuum pump set; the temperature sensor can be set near the second pipeline or near the vacuum pump set and the tubular heat exchanger; the concentration sensor can be set at the water inlet of the first pipeline; the liquid level sensor can be set at any position capable of measuring the liquid level height.

[0086] Through the above sensors, the vacuum degree, temperature, liquid level height, and solution concentration inside the box body and the treatment device environment can be judged, and then the water inflow rate and the water inlet timing of the wastewater to be treated can be adjusted in combination with the system parameters to reduce the fluctuation of the vacuum degree inside the treatment device and maintain the stable operation of the treatment device system.

[0087] In a specific embodiment, according to the treatment situation, when the deposition amount of solid inorganic salts in the tray is relatively large, water intake can be stopped. After evaporating the inorganic salts to pure solids, they are collected and processed, and at the same time, the heating surface is cleaned. Regular cleaning and collection of solid inorganic salts (once a week) can prevent the formation of a scaling layer.

[0088] Figure 2 It is a schematic flow chart corresponding to the method for treating inorganic salt wastewater provided by an embodiment of the present invention. The execution subject can be a system capable of implementing the system corresponding to the method for treating inorganic salt wastewater, such as a system including a sound wave generator, a sound wave measuring device, and other devices or structures capable of implementing the method for treating inorganic salt wastewater; please refer to Figure 2 In one embodiment, a method for treating inorganic salt wastewater includes the following steps:

[0089] Step S201: Input the wastewater to be treated into the liquid storage tank through the first pipeline, and input steam into the liquid storage tank through the second pipeline; wherein, the steam is used to provide a high-temperature environment inside the box; the water intake sequence of the wastewater to be treated is determined based on system parameters;

[0090] During the evaporation process, the evaporation rate of water in the liquid will cause local pressure fluctuations. Such fluctuations will lead to instability of the vacuum degree, which in turn affects the evaporation efficiency of water and the precipitation process of inorganic salts. For example: Temperature control: The higher the temperature, the greater the solubility of the solute, and the easier it is to dissolve in the solution. When the temperature decreases, the solubility of the solute will decrease, and the solute will precipitate. However, if the temperature changes too quickly or unevenly, it may cause the crystallization rate to be too fast, resulting in disordered crystallization or too many small crystals; Pressure control: During the vacuum evaporation crystallization process, pressure has a significant impact on solubility. At high temperatures, low pressure helps to accelerate evaporation and improve crystallization efficiency, but too low a pressure may cause the solvent to evaporate rapidly, resulting in incomplete crystallization or even the formation of bubbles, interfering with the crystallization process; It can be understood that the occurrence of the above-mentioned vacuum fluctuations is particularly concentrated when the wastewater to be treated flows into the first pipeline. Therefore, by adjusting the water intake time and water intake amount of the wastewater to be treated, it is possible to reduce the fluctuations of the vacuum degree of the treatment device, thereby ensuring the stable operation of the treatment device.

[0091] In a specific embodiment, the wastewater to be treated containing inorganic salt solutes is simultaneously input into the liquid storage tank through the first pipeline, and high-temperature steam is injected around the liquid storage tank through the second pipeline to provide a high-temperature environment for the evaporation of water in the wastewater to be treated.

[0092] Since it is necessary to regulate the inlet time and inlet volume of the wastewater to be treated, this adjustment can be achieved through system parameters. Among them, the system parameters can include temperature parameters, vacuum parameters, liquid level height, and concentration parameters. A PLC (Programmable Logic Controller) can be used to regulate the inlet volume and inlet time of the wastewater to be treated.

[0093] Step S202: When the vacuum and temperature inside the box reach the preset reaction threshold, the water in the wastewater to be treated evaporates to form steam condensate and inorganic salt crystals precipitate out.

[0094] In a specific embodiment, after setting operating parameters such as the inlet volume, inlet time, working temperature, and vacuum, start the machine. After the wastewater to be treated is transported to the liquid storage tank in the equipment by a transfer water pump, the vacuum pump group and the heating system (used to provide high-temperature steam, Figure 1 not shown but its position can be understood to be connected to the input end of the second pipeline) operate. When the vacuum and temperature reach the set requirements, the water in the wastewater to be treated continuously evaporates, is collected and condensed by the treatment device and then discharged, and the inorganic salt substances in the box become solid substances to be collected. The treated solid substances are easy to collect (i.e., the solid recovery and cleaning process): usually collected once a week, and the evaporated water can be directly discharged up to the standard after condensation.

[0095] Step S203: The steam condensate is discharged after being cooled by the condensation coolant in the third pipeline.

[0096] In a specific embodiment, the steam condensate obtained after evaporation is cooled by the condensation coolant in the third pipeline and discharged to the outside through the second pipeline. The discharged steam condensate meets the discharge standard, which can reduce environmental pollution caused by sewage discharge. In addition, when the treatment device stops working or injects the wastewater to be treated, the vacuum regulating valve opens so that the vacuum inside the treatment device is the same as the vacuum of the external environment, both being atmospheric pressure.

[0097] Figure 3 is a schematic flow chart corresponding to the determination of the inlet volume provided by the embodiment of the present invention; as Figure 3 shown, the method further includes:

[0098] Step S301: Obtain the solubility calculation formula; the solubility calculation formula is composed based on temperature parameters and vacuum parameters.

[0099] In a specific embodiment, during the evaporation of inorganic salt wastewater, in order to avoid premature precipitation of crystals due to too high a concentration of inorganic salt wastewater, resulting in energy loss and equipment damage, it is necessary to accurately determine a key liquid level height. When the liquid level drops to this height, new wastewater to be treated should be replenished in time to avoid excessive concentration of the liquid.

[0100] Specifically, the liquid level height, i.e., the position height of the liquid, can be determined in combination with the solubility calculation formula. Due to the existence of vacuum fluctuations, the temperature and pressure of the liquid will fluctuate, which directly affects the solubility of the solute. We assume that the solubility varies with temperature and air pressure and is specifically expressed as

[0101]

[0102] wherein, is the solubility, is the standard solubility, is the enthalpy change of the dissolution reaction, is the correction coefficient, which is obtained by correcting based on the measurement results of the sensor, is the air pressure, is the universal gas constant, and its value is 8.314 J / mol*K, is the reference temperature, which can be set to 298.15 K in the embodiments of the present invention.

[0103] Step S302: Obtain the initial concentration parameter and the initial wastewater volume of the wastewater to be treated;

[0104] Step S303: Determine the liquid level height corresponding to the liquid to be treated based on the solubility calculation formula, the initial concentration parameter, and the initial wastewater volume;

[0105] The setting of the liquid level height is to ensure that the wastewater to be treated will enter the supersaturated state, as shown in the following formula:

[0106]

[0107]

[0108] wherein, the initial concentration parameter is , which is the initial concentration of the wastewater to be treated, and the initial wastewater volume is , which is the volume of the wastewater to be treated, is the evaporation rate, is the evaporation area, is the correction coefficient, which can be obtained by correcting based on the measurement results of each sensor.

[0109] Step S304: Determine the water inflow corresponding to the liquid to be treated based on the liquid level height.

[0110] In a specific embodiment, it can be considered that the liquid level height can calculate the volume of the wastewater to be treated in the treatment device. Furthermore, in combination with the volume, it can be determined whether the wastewater to be treated in the treatment device has entered the supersaturated state, so as to determine whether it is necessary to supplement new wastewater to be treated and the supplementary volume of the wastewater to be treated, that is, the water inflow rate.

[0111] Figure 4 is a schematic flowchart corresponding to the determination of the target water inflow rate provided by the embodiment of the present invention; as Figure 4 shown, the method further includes:

[0112] Step S401: Obtain the historical vacuum degree parameters, historical temperature parameters, historical liquid level height, and historical concentration parameters respectively corresponding to the inorganic salt wastewater treatment device in multiple historical treatment processes;

[0113] In a specific embodiment, since the control of the water inflow rate and the water inlet time of the wastewater to be treated needs to be determined in combination with the system parameters, the historical system parameters obtained from the historical treatment cycle can be obtained, that is, the historical vacuum degree parameters, historical temperature parameters, historical liquid level height, and historical concentration parameters. By using them as the original data to train the convolutional neural network, a target convolutional neural network capable of regulating the water inlet time and the water inflow rate of the wastewater to be treated can be obtained.

[0114] Step S402: Perform normalization processing on the historical vacuum degree parameters, the historical temperature parameters, the historical liquid level height, and the historical concentration parameters to obtain target processing parameters;

[0115] Specifically, before inputting the historical vacuum degree parameters, historical temperature parameters, historical liquid level height, and historical concentration parameters into the convolutional neural network for training, they can be preprocessed first to improve the model convergence speed, model accuracy, and eliminate the difference in data dimensions. In the embodiment of the present invention, the preprocessing can be normalization processing, and the obtained target processing parameters include the target vacuum degree parameters, target temperature parameters, target concentration parameters, and target liquid level height corresponding to each historical treatment cycle after normalization processing.

[0116] Step S403: Input the target processing parameters into the convolutional neural network to obtain the to-be-optimized mapping relationship between the target processing parameters and the preset water inlet sequence;

[0117] In a specific embodiment, the convolutional neural network can at least include an input layer, a convolutional layer, a pooling layer, and a fully connected layer; Figure 5 is a schematic flowchart corresponding to the determination of the to-be-optimized mapping relationship provided by the embodiment of the present invention; as Figure 5 shown, the inputting the target processing parameters into the convolutional neural network to obtain the to-be-optimized mapping relationship includes:

[0118] Step S501: Extract the temporal features corresponding to the target processing parameters based on the convolutional layer and the pooling layer;

[0119] In a specific embodiment, first, the target processing parameters can be input into the input layer of the convolutional neural network, and then the target processing parameters are transmitted to the convolutional layer and the pooling layer through the input layer, and feature extraction is performed on the target processing parameters based on the convolutional layer and the pooling layer to obtain the temporal features corresponding to the target processing parameters. According to the temporal features corresponding to the target processing parameters, the change patterns and rules of the system parameters in the treatment process of inorganic salt wastewater can be determined.

[0120] Step S502: Establish the mapping relationship to be optimized between the temporal features and the preset influent sequence based on the fully connected layer.

[0121] In a specific embodiment, N influent sequences can be randomly generated as the preset influent sequences, and the temporal features corresponding to the target processing parameters are mapped to the prediction of the preset influent sequences in the fully connected layer, and the mapping relationship to be optimized is obtained. Among them, the preset influent sequence can be:

[0122]

[0123] where q represents the liquid level height at the i-th influent.

[0124] Step S404: Iterate the mapping relationship to be optimized based on the loss function to obtain the target influent sequence; the target influent sequence includes the target liquid level heights corresponding to multiple influents;

[0125] In a specific embodiment, based on the loss function and the mapping relationship to be optimized, the fitness corresponding to each preset influent sequence is calculated; among them, the loss function L should include two parts: the volume of the final solid crystallization of inorganic salts and the mass of the water finally evaporated from the wastewater to be treated. The volume of the final solid crystallization of inorganic salts should be minimized, and the mass of the water finally evaporated from the wastewater to be treated should be maximized. The smaller the loss function L, the better the influent sequence Q, that is, the more it can reduce the treatment fluctuations; therefore, the loss function L can be:

[0126]

[0127] where is the volume of the final solid crystallization of inorganic salts, is the maximum threshold of the crystallization volume; is the mass of the water finally evaporated from the wastewater to be treated, is the maximum threshold of the water evaporation; and are the weight coefficients respectively, and satisfy , the weight coefficient is used to balance the importance of the volume of the final solid crystallization of the inorganic salt and the mass of the water finally evaporated from the wastewater to be treated.

[0128] Further, after calculating the fitness corresponding to each preset influent sequence using the loss function, select excellent preset influent sequences to enter the mating pool according to the fitness level; perform crossover operations on the preset influent sequences in the mating pool to generate new preset influent sequences; randomly adjust the liquid level height in the new preset influent sequences with a small probability to increase data diversity; repeat this process until the stop condition is met (such as the number of iterations meets the iteration threshold, the fitness meets the fitness threshold, etc.), and determine the influent sequence at this time as the target influent sequence. It can be considered that the target influent sequence is an array, and each element in it corresponds to the target liquid level height at an influent time.

[0129] Step S405: Determine the target influent volume of the wastewater to be treated at different influent times based on the target liquid level height.

[0130] In a specific embodiment, for the treatment process of any wastewater to be treated, it can be considered that the target liquid level height can calculate the volume of the wastewater to be treated in the treatment device, and then combined with the volume, it can be judged whether the wastewater to be treated in the treatment device has entered the supersaturated state, so as to determine whether it is necessary to supplement new wastewater to be treated and the supplementary volume of the wastewater to be treated, that is, the target influent volume corresponding to different influent times.

[0131] In summary, in the process of treating inorganic salt wastewater, maintaining the stability of the system is crucial for improving the resource recovery efficiency. The dynamic adaptability of the equipment and the improvement of the fault prediction mechanism will effectively reduce the negative impact brought by vacuum fluctuations and achieve safer and more efficient water treatment.

[0132] The embodiment of the present invention also provides an electronic device, which includes: a processor and a memory. At least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the inorganic salt wastewater treatment method as described in any one of the method embodiments.

[0133] An embodiment of the present invention also provides a storage medium. A computer-readable storage medium may be a tangible device that holds and stores instructions used by an instruction execution device. The computer-readable storage medium may be an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punched card or raised structures in grooves storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage medium used herein is not construed as an instantaneous signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagated through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0134] The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network may include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0135] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine - related instructions, microcode, firmware instructions, state - setting data, or source code or object code written in any combination of one or more programming languages, including object - oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer - readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand - alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider). In some embodiments, by using the state information of the computer - readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field - programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer - readable program instructions to implement various aspects of the present disclosure.

[0136] Aspects of the present disclosure are described herein with reference to the flowchart and / or block diagram of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowchart and / or block diagram, and the combinations of blocks in the flowchart and / or block diagram, can be implemented by computer - readable program instructions.

[0137] These computer - readable program instructions can be provided to a processor of a general - purpose computer, a special - purpose computer, or other programmable data - processing apparatus to produce a machine such that, when the instructions are executed by the processor of the computer or other programmable data - processing apparatus, a device is created that implements the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer - readable program instructions can also be stored in a computer - readable storage medium, which causes a computer, a programmable data - processing apparatus, and / or other devices to operate in a particular manner. Thus, the computer - readable medium storing the instructions includes a manufacture that includes instructions for implementing various aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0138] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices, causing a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other devices to generate a computer-implemented process, so that the instructions executed on the computer, other programmable data processing apparatus, or other devices implement the functions / actions specified in one or more boxes of the flowchart and / or block diagram.

[0139] The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of an instruction, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block of the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered by the protection scope of the claims of the present invention.

Claims

1. A method for treating inorganic salt wastewater, characterized in that: include: The wastewater to be treated is input into the liquid storage tank through the first pipeline, and the steam is input into the liquid storage tank through the second pipeline; wherein the steam is used to provide a high temperature environment inside the box; the water inlet sequence of the wastewater to be treated is determined based on the system parameters; When the vacuum degree and temperature inside the box reach the preset reaction threshold, the water in the wastewater to be treated evaporates to form steam condensation and precipitate inorganic salt crystals; The steam condensate is mixed with the coolant in the third pipeline and then discharged; Obtain a solubility calculation formula; the solubility calculation formula is based on temperature parameters and vacuum parameters; Obtaining initial concentration parameters and initial wastewater volume of wastewater to be treated; Based on the solubility calculation formula, the initial concentration parameter and the initial wastewater volume, the liquid level height corresponding to the liquid to be treated is determined; Determine the water inflow corresponding to the liquid to be treated based on the liquid level height; Obtain historical vacuum parameters, historical temperature parameters, historical liquid level heights, and historical concentration parameters corresponding to the inorganic salt wastewater treatment device in multiple historical treatment processes; Normalizing historical vacuum parameters, historical temperature parameters, historical liquid level heights, and historical concentration parameters to obtain target processing parameters; Inputting the target processing parameters into the convolutional neural network, obtaining a mapping relationship to be optimized between the target processing parameters and the preset water inlet sequence; Based on the loss function, the mapping relationship to be optimized is iterated to obtain a target water inflow sequence; the target water inflow sequence includes target liquid level heights corresponding to multiple water inflows; Determine the target water inflow of the wastewater to be treated corresponding to different water inflow times based on the target liquid level height; Based on the loss function and the mapping relationship to be optimized, the fitness corresponding to each preset water inlet sequence is calculated; wherein the loss function L includes the volume of the final crystallization of the inorganic salt solid and the water mass of the final evaporated wastewater to be treated, and the loss function L is: Among them, V crystal is the volume of the final crystal of the inorganic salt solid state, V crystal_max is the maximum threshold of crystal volume; M evaporated is the final evaporated water mass of the wastewater to be treated, M evaporated_max is the maximum threshold of water evaporation; α and β are weight coefficients, respectively, and satisfy α+β=1. The weight coefficient is used to balance the importance of the volume of the final crystallization of the inorganic salt solid and the mass of water finally evaporated from the wastewater to be treated.

2. The method for treating inorganic salt wastewater according to claim 1, characterized in that: Convolutional neural networks include convolutional layers, pooling layers, and fully connected layers; Input the target processing parameters into the convolutional neural network to obtain the mapping relationship to be optimized, including: Based on the convolution layer and the pooling layer, the temporal features corresponding to the target processing parameters are extracted; Based on the fully connected layer, the mapping relationship to be optimized between the time series features and the preset water inlet sequence is established.

3. The method for treating inorganic salt wastewater according to claim 1, characterized in that: The method is used to be performed on an inorganic salt wastewater treatment device, and the inorganic salt wastewater treatment device comprises: The box body includes a liquid storage tank inside; the liquid storage tank is used to contain the wastewater to be treated so that the water in the wastewater to be treated evaporates and inorganic salt crystals are precipitated; A vacuum regulating unit, including a vacuum gauge and a vacuum regulating valve, which are arranged on the box body, the vacuum gauge is used to display the vacuum degree inside the box body, and the vacuum regulating valve is used to keep the pressure inside the box body at the same value as the external environment; A first pipeline, the first pipeline is connected to one end of the liquid storage tank, and the wastewater to be treated flows into the liquid storage tank through the first pipeline; the water inlet sequence of the wastewater to be treated is determined based on the system parameters; A second pipeline, the second pipeline is connected to the other end of the liquid storage tank, the steam enters the liquid storage tank through the second pipeline, and forms steam condensate and evaporated gas together with the wastewater to be treated; a tubular heat exchanger connected to the interior of the box through a second pipeline to receive the evaporated gas; A vacuum pump group is connected to the tubular heat exchanger and is used to provide the required vacuum degree inside the box; the device is used to implement the inorganic salt wastewater treatment method.

4. The method for treating inorganic salt wastewater according to claim 3, characterized in that: The device also includes a third pipeline; The third pipeline is connected to the vacuum pump group and the tubular heat exchanger respectively, and is used to cooperate with the tubular heat exchanger to cool the evaporated gas, and is used to cooperate with the vacuum pump group to cool the steam condensate.

5. The method for treating inorganic salt wastewater according to claim 3, characterized in that: The number of the liquid storage tank is at least one; The second pipeline is connected to one end of each liquid storage tank through a metal hose, so that the steam condensate is discharged through the second pipeline.

6. The method for treating inorganic salt wastewater according to claim 3, characterized in that: The inorganic salt wastewater treatment device is also connected to a sewage treatment tank outside the box.

7. The method for treating inorganic salt wastewater according to claim 3, characterized in that: The inorganic salt wastewater treatment device also includes a temperature sensor, a vacuum sensor, a liquid level sensor and a concentration sensor; the system parameters include temperature parameters, vacuum parameters, liquid level height and concentration parameters; The temperature sensor is used to obtain temperature parameters; the vacuum sensor is used to obtain vacuum parameters; The liquid level sensor is used to obtain the liquid level height; the concentration sensor is used to obtain the concentration parameters.

8. An electronic device, comprising a processor and a memory, wherein the memory stores at least one instruction and at least one program, and the at least one instruction and the at least one program are loaded and executed by the processor to implement the inorganic salt wastewater treatment method as described in claim 1.

9. A computer storage medium, wherein at least one instruction and at least one program are stored in the computer storage medium, wherein the at least one instruction and the at least one program are loaded and executed by a processor to implement the inorganic salt wastewater treatment method as claimed in claim 1.

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