A chemical waste liquid treatment device and treatment process

Abstract

The present invention relates to the technical field of sewage treatment, and specifically relates to a chemical waste liquid treatment device and a treatment process. First, based on the overall magnitude of the concentration data of heavy metals monitored by a heavy metal detector, a judgment on the discharge requirements is made; when the discharge requirements are not met, the pretreated chemical waste liquid is pumped back into the treatment tank, and the stirring speed with better stirring effect is determined according to the turbidity of the pretreated chemical waste liquid. Combining the instantaneous change of turbidity and the relative magnitude of the liquid flow rate with respect to the whole, the cleaning frequency is adjusted in real time, so as to adaptively treat the pretreated chemical waste liquid, solving the problems that when a large amount of solid impurities appear during the fusion of chemical waste liquid and coagulant liquid, it may cause greater pressure on the cleaning scraper and lead to the blockage of the sewage discharge pipeline, and it is impossible to accurately judge whether the treated waste liquid meets the discharge standards, resulting in better treatment effect of the chemical waste liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically relates to a chemical waste liquid treatment device and a treatment process. Background Art

[0002] During the process of chemical production, a large amount of chemical waste liquid is usually generated. These waste liquids usually contain a large amount of toxic substances. If they are directly discharged without reasonable treatment and purification, it will cause extremely serious impacts on the natural environment and even affect the lives of residents around the basin. Therefore, it is necessary to treat chemical waste liquid.

[0003] The patent document with the publication number CN214571200U in the prior art discloses a waste liquid treatment device for chemical environmental protection. This device fully mixes the waste liquid with the coagulant liquid through stirring, thereby generating a reaction to produce precipitates. Subsequently, the precipitates are intercepted by a filter screen. Finally, a cleaning scraper is used to remove and collect the precipitates on the surface of the filter screen. Eventually, the coagulated impurities, harmful substances, etc. are discharged through a sewage pipe, and the wastewater is discharged from the drain outlet. However, this device only sets one sewage pipe for discharging impurity wastes. Therefore, when a large amount of solid impurities appear during the fusion of chemical waste liquid and coagulant liquid, it may cause a large pressure on the cleaning scraper and lead to the blockage of the sewage pipeline, and it is impossible to accurately judge whether the treated waste liquid meets the discharge standard, resulting in poor treatment effect of chemical waste liquid. Summary of the Invention

[0004] The present application provides a chemical waste liquid treatment device, including a water inlet pipe, a treatment tank, a water outlet pipe A, a chemical waste liquid temporary storage tank, a data sensor group and a heavy metal detector, and a control module. The treatment tank is connected to the chemical waste liquid temporary storage tank through the water outlet pipe A. The chemical waste liquid to be treated enters the treatment tank through the water inlet pipe, and after pretreatment in the treatment tank, the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank through the water outlet pipe A. The heavy metal detector is located in the chemical waste liquid temporary storage tank, and the data sensor group is installed in the treatment tank. The data sensor group includes a turbidity sensor, a flow sensor and a flow velocity sensor. The heavy metal detector is used to detect the concentration data of each heavy metal. The flow sensor group is used to detect the flow rate of the liquid on the surface of the filter screen in the treatment tank. The flow velocity sensor group is used to detect the flow velocity of the liquid on the surface of the filter screen in the treatment tank. The turbidity sensor is used to collect the turbidity of the pretreated chemical waste liquid in the treatment tank. The heavy metal detector, the flow sensor, the flow velocity sensor and the turbidity sensor are all signal-connected to the control module. The control module is used to obtain the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process and the liquid flow degree and turbidity at each sampling moment during the waste liquid treatment process.

[0005] According to the concentration data of each heavy metal in the pretreated chemical waste liquid, determine whether the pretreated chemical waste liquid meets the discharge requirements. When the pretreated chemical waste liquid does not meet the discharge requirements, pump the pretreated chemical waste liquid back to the treatment tank and repeat the waste liquid treatment of the pretreated chemical waste liquid, and input the chemical waste liquid into the temporary storage tank again through the water outlet pipe A after the waste liquid treatment until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pretreated chemical waste liquid is discharged;

[0006] The process of the waste liquid treatment is as follows: according to the turbidity of the pretreated chemical waste liquid at each sampling moment during each waste liquid treatment, determine the stirring speed at each sampling moment during each waste liquid treatment; during the process of stirring the pretreated chemical waste liquid at the stirring speed, according to the instantaneous change of the turbidity and the relative size of the liquid flow degree with respect to the whole at each sampling moment, determine the cleaning frequency at each sampling moment during each waste liquid treatment; perform waste liquid treatment according to all the stirring speeds and all the cleaning frequencies during each waste liquid treatment process.

[0007] Further, the discharge requirements include:

[0008] According to the overall size of the concentrations of various heavy metals in the pretreated chemical waste liquid, determine the corresponding heavy metal concentration reference value; the discharge requirement is that the heavy metal concentration reference value is less than the preset discharge threshold.

[0009] Further, the process of obtaining the heavy metal concentration reference value includes:

[0010] Take the normalized value of the cumulative value of the concentration data of all types of heavy metals as the corresponding heavy metal concentration reference value.

[0011] Further, the process of obtaining the stirring speed includes:

[0012] Determine the speed adjustment range according to the maximum speed of the stirring motor; determine the speed range difference and the minimum speed of the speed adjustment range;

[0013] Take the product of the normalized value of the turbidity of the pretreated chemical waste liquid at each sampling moment during each iterative waste liquid treatment process and the speed range difference as the speed adjustment value at each sampling moment;

[0014] Take the sum value between the minimum speed and the speed adjustment value as the stirring speed at each sampling moment during each waste liquid treatment process.

[0015] Further, the process of obtaining the liquid flow degree includes:

[0016] Take the product of the flow velocity and the flow rate of the liquid on the filter surface at each sampling moment as the corresponding liquid flow velocity.

[0017] Further, the process of obtaining the cleaning frequency includes:

[0018] For any waste liquid treatment:

[0019] Regarding each sampling moment during the waste liquid treatment process in sequence as the target moment, and taking all the moments before the target moment as the corresponding reference moments;

[0020] Taking the average value of the liquid flow velocities corresponding to all the reference moments as the reference flow velocity; determining the instantaneous comparison value of the liquid flow at the target moment according to the difference between the reference flow velocity and the liquid flow velocity at the target moment;

[0021] Determining the reference value of the deposition rate at the target moment according to the overall turbidity change situation of all the reference moments and the instantaneous turbidity change situation at the target moment;

[0022] Determining the frequency increase weight at the target moment according to the reference value of the deposition rate and the instantaneous comparison value of the liquid flow; both the reference value of the deposition rate and the instantaneous comparison value of the liquid flow are positively correlated with the frequency increase weight;

[0023] Determining the cleaning frequency at the target moment by combining the frequency increase weight with the preset standard cleaning frequency.

[0024] Further, the process of obtaining the reference value of the deposition rate includes:

[0025] Taking the difference between the turbidity at each sampling moment and the turbidity at the previous sampling moment as the turbidity change value at each sampling moment;

[0026] Taking the average value of the turbidity change values corresponding to all the reference moments of the target moment as the reference change value;

[0027] Taking the sum value between the reference change value and the turbidity change value at the target moment as the reference value of the deposition rate at the target moment.

[0028] Further, the process of obtaining the frequency increase weight includes:

[0029] Determining the frequency increase weight at the target moment according to the normalized value of the product between the reference value of the deposition rate and the instantaneous comparison value of the liquid flow.

[0030] Further, the step of determining the cleaning frequency at the target moment by combining the frequency increase weight with the preset standard cleaning frequency includes:

[0031] Taking the product between the preset standard cleaning frequency and the frequency increase weight as the cleaning frequency increase value at the target moment;

[0032] Determine the cleaning frequency at the target moment according to the sum value between the increased cleaning frequency value and the preset standard cleaning frequency.

[0033] A chemical waste liquid treatment process includes the following steps:

[0034] Obtain the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process, as well as the liquid flow degree and turbidity at each sampling moment during the waste liquid treatment process.

[0035] According to the concentration data of each heavy metal in the pretreated chemical waste liquid, determine whether the pretreated chemical waste liquid meets the discharge requirements. When the pretreated chemical waste liquid does not meet the discharge requirements, pump the pretreated chemical waste liquid back into the treatment tank and repeat the waste liquid treatment for the pretreated chemical waste liquid, and input the chemical waste liquid into the temporary storage tank through the water outlet pipe A after the waste liquid treatment until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pretreated chemical waste liquid is discharged.

[0036] The process of the waste liquid treatment is as follows: Determine the stirring speed at each sampling moment during each waste liquid treatment according to the turbidity size of the pretreated chemical waste liquid at each sampling moment during each waste liquid treatment; during the process of stirring the pretreated chemical waste liquid at the stirring speed, determine the cleaning frequency at each sampling moment during each waste liquid treatment according to the instantaneous change of the turbidity and the size of the liquid flow degree relative to the whole at each sampling moment; perform waste liquid treatment according to all the stirring speeds and all the cleaning frequencies during each waste liquid treatment process.

[0037] The present application has the following beneficial effects:

[0038] First, judge the discharge requirements by means of the overall size of the concentration data of heavy metals monitored by the heavy metal detector; when the discharge requirements are not met, pump the pretreated chemical waste liquid back into the treatment tank, determine a stirring speed with better stirring effect according to the turbidity of the pretreated chemical waste liquid, and adjust the cleaning frequency in real time in combination with the instantaneous change of the turbidity and the size of the liquid flow degree relative to the whole, so as to perform adaptive treatment on the pretreated chemical waste liquid, solve the problem that when a large amount of solid impurities appear during the fusion of chemical waste liquid and coagulant liquid, it may cause greater pressure on the cleaning scraper and lead to the blockage of the sewage discharge pipe, and it is impossible to accurately judge whether the treated waste liquid meets the discharge standard, and make the treatment effect of the chemical waste liquid better. Description of the Drawings

[0039] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0040] Figure 1 FIG. 4 is a schematic diagram of the overall structure of a chemical waste liquid treatment device provided by an embodiment of the present invention.

[0041] Figure 1 The reference numerals in FIG. 4 are: 1, treatment tank; 2, feed inlet A; 3, water inlet pipe; 4, motor; 5, water outlet pipe A; 6, water outlet valve; 7, sewage pipe; 8, sewage valve; 9, vibration device; 10, data sensor group; 111, single-layer filter screen; 112, double-layer filter screen; 12, connecting rod; 13, cleaning scraper; 14, stirring rod; 15, stirring blade; 16, chemical waste liquid temporary storage tank; 17, heavy metal detector; 18, feed inlet B; 19, water outlet pipe B; 20, water pump; 21, water suction pipe. Detailed implementation manners

[0042] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in conjunction with the attached drawings and preferred embodiments, detail the specific implementation manners, structures, features, and effects of a chemical waste liquid treatment device and treatment process proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment, and the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include one or more of these features.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0044] The following will specifically describe the specific solutions of a chemical waste liquid treatment device and treatment process provided by the present invention in conjunction with the attached drawings.

[0045] The present application provides a chemical waste liquid treatment device. Please refer to Figure 1, which shows a schematic diagram of the overall structure of a chemical waste liquid treatment device provided by an embodiment of the present invention, including: a treatment tank 1, a feed inlet A 2, a water inlet pipe 3, a motor 4, a water outlet pipe A 5, a water outlet valve 6, a sewage pipe 7, a sewage valve 8, a vibration device 9, a data sensor group 10, a single-layer filter screen 111, a double-layer filter screen 112, a connecting rod 12, a cleaning scraper 13, a stirring rod 14, a stirring blade 15, a chemical waste liquid temporary storage tank 16, a heavy metal detector 17, a feed inlet B 18, a water outlet pipe B 19, a water pump 20 and a water suction pipe 21.

[0046] The treatment tank 1 is connected to the chemical waste liquid temporary storage tank 16 through the water outlet pipe A 5; the chemical waste liquid to be treated enters the treatment tank 1 through the water inlet pipe 3, and after being pretreated in the treatment tank 1, the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank 16 through the water outlet pipe A 5; the heavy metal detector 17 is located in the chemical waste liquid temporary storage tank 16; the data sensor group 10 is installed in the treatment tank 1, and the data sensor group 10 includes a turbidity sensor, a flow sensor and a flow velocity sensor; the heavy metal detector is used to detect the concentration data of each heavy metal, the flow sensor group is used to detect the flow rate of the liquid on the filter screen surface in the treatment tank 1, and the flow velocity sensor group is used to detect the flow velocity of the liquid on the filter screen surface in the treatment tank 1; the turbidity sensor is used to collect the turbidity of the pretreated chemical waste liquid in the treatment tank 1; the heavy metal detector, the flow sensor, the flow velocity sensor and the turbidity sensor are all signal-connected to the control module. The control module can be a data processing chip such as a CPU or an MCU, or a data processing device such as a computer host, and the respective output ends corresponding to the heavy metal detector, the flow sensor, the flow velocity sensor and the turbidity sensor are connected to the input end of the control module, and can be connected by wire through a data transmission line, or can be connected wirelessly through wireless communication methods such as Bluetooth and WiFi.

[0047] First, in the initial state, there is no chemical waste liquid in the treatment tank 1 and the chemical waste liquid temporary storage tank 16. The chemical waste liquid to be treated enters the treatment tank 1 through the water inlet pipe 3, and the chemical waste liquid to be treated is preliminarily filtered through the single-layer filter screen 111 on the top layer to remove the existing impurity solids. And before inputting the chemical waste liquid to be treated, the aperture of the double-layer filter screen 112 is controlled to shrink to a fully closed state, so that the chemical waste liquid to be treated cannot pass through the double-layer filter screen 112 before the coagulant is mixed with the chemical waste liquid. Then, the coagulant is input through the feed port A2 to be mixed with the chemical waste liquid to be treated. The aperture of the double-layer filter screen is adjusted to the maximum, the rotation speed of the motor 4 is adjusted to 300 revolutions per minute, and the cleaning frequency of the scraper is set to 6 times per minute. After 10 minutes, the pretreated chemical waste liquid is obtained, and the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank 16 through the water outlet pipe A5 by means of the water outlet valve 6. Then, the concentration data of each heavy metal in the pretreated chemical waste liquid is measured by the heavy metal detector, and after the concentration data is input into the control module, it is judged whether the discharge requirement is met. When the discharge requirement is met, it is discharged through the water outlet pipe B19 by means of the water valve on the water outlet pipe B19. When the discharge requirement is not met, it is re-input into the treatment tank 1 by means of the water pump 20 and the water suction pipe 21, and after the waste liquid treatment process, the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank 16 through the water outlet pipe A5 by means of the water outlet valve 6, and the judgment of the discharge requirement is carried out again. When the discharge requirement is not met, the waste liquid treatment is continued in a cycle until the discharge requirement is met, and then it is discharged through the water outlet pipe B19 by means of the water valve on the water outlet pipe B19.

[0048] The control module obtains the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process, as well as the liquid flow degree and turbidity at each sampling moment during the waste liquid treatment process.

[0049] In a specific implementation manner of the embodiment of the present invention, whenever the pretreated chemical waste liquid is completely input from the treatment tank 1 into the chemical waste liquid temporary storage tank 16, the concentration data of each heavy metal in the pretreated chemical waste liquid is measured by the heavy metal detector, that is, the concentration data of each heavy metal before each waste liquid treatment process is obtained. In a specific implementation manner of the embodiment of the present invention, the types of heavy metals detected by the heavy metal detector are cadmium, mercury, chromium, and selenium. The implementer can adjust the types of heavy metals according to the specific implementation environment, and is not limited to the types and the number of types of the above heavy metals, and will not be further elaborated here. It should be noted that all the data collected in the embodiment of the present invention are values after normalization to prevent the influence of different dimensions during the calculation process.

[0050] In a specific implementation manner of the embodiment of the present invention, when the pretreated chemical waste liquid is completely input from the chemical waste liquid temporary storage tank 16 into the treatment tank 1, the flow rate at each sampling moment during the waste liquid treatment process is collected by the flow sensor in the data sensor group 10, the flow velocity at each sampling moment during the waste liquid treatment process is collected by the flow velocity sensor in the data sensor group 10, and the turbidity of the pretreated chemical waste liquid at each sampling moment is measured by the turbidity sensor, that is, the turbidity of the pretreated chemical waste liquid at each sampling moment during each waste liquid treatment process is obtained. Then, the liquid circulation degree at each sampling moment during the waste liquid treatment process is determined by combining the flow rate and the flow velocity.

[0051] Preferably, in some possible implementation manners of the embodiment of the present invention, the process of obtaining the liquid circulation speed includes:

[0052] Taking the product of the flow velocity and the flow rate of the liquid on the filter screen surface at each sampling moment as the corresponding liquid circulation speed. It should be noted that in addition to the product, the implementer can also calculate the liquid circulation speed by other methods according to the relevant relationship, such as the normalized values of the mean value, the sum value, etc., which will not be further elaborated here.

[0053] After the chemical waste liquid to be treated is treated in the treatment tank 1, the obtained pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank 16. According to the concentration data of each heavy metal in the pretreated chemical waste liquid, it is judged whether the pretreated chemical waste liquid meets the discharge requirements. For chemical waste liquid, the heavy metal substances therein will cause serious pollution to the environment. Therefore, the concentration of heavy metals determines whether it can be discharged.

[0054] Preferably, in some possible implementation manners of the embodiment of the present invention, the discharge requirements include:

[0055] Determining the corresponding heavy metal concentration reference value according to the overall magnitude of the concentrations of various heavy metals in the pretreated chemical waste liquid; the discharge requirement is that the heavy metal concentration reference value is less than the preset discharge threshold; that is, when the heavy metal concentration reference value is less than the preset discharge threshold, it indicates that the discharge requirements are met, otherwise it indicates that the discharge requirements are not met.

[0056] Preferably, in some possible implementation manners of the embodiment of the present invention, the process of obtaining the heavy metal concentration reference value includes:

[0057] Taking the normalized value of the cumulative value of the concentration data of all types of heavy metals as the corresponding heavy metal concentration reference value. The larger the cumulative value of the concentration data of all types of heavy metals, the higher the concentration content of heavy metals, the more further treatment is required, that is, the less the discharge requirements are met.

[0058] In a specific implementation manner of the embodiment of the present invention, the process of obtaining the heavy metal concentration reference value is expressed by the formula: ; wherein, is the reference value of the heavy metal concentration in the pretreated chemical waste liquid; is the concentration data of each heavy metal in the pretreated chemical waste liquid; is a normalization function, which restricts the calculated reference value of the heavy metal concentration within the range of 0 to 1 to make a more intuitive judgment on the emission requirements. In a specific implementation manner of the embodiment of the present invention, the preset emission threshold is set to 0.57 and can be adjusted according to the specific implementation environment.

[0059] Further, when the pretreated chemical waste liquid does not meet the emission requirements, the pretreated chemical waste liquid is pumped back to the treatment tank and the waste liquid treatment of the pretreated chemical waste liquid is repeated, and after the waste liquid treatment, it is repeatedly input into the chemical waste liquid storage tank through the water outlet pipe A until the pretreated chemical waste liquid after the waste liquid treatment meets the emission requirements and the pretreated chemical waste liquid is discharged. Specifically: when the pretreated chemical waste liquid meets the emission requirements, that is, when the reference value of the heavy metal concentration in the pretreated chemical waste liquid is less than the preset emission threshold, the pretreated chemical waste liquid is directly discharged through the water outlet pipe B19; on the contrary, when the pretreated chemical waste liquid does not meet the emission requirements, that is, when the reference value of the heavy metal concentration in the pretreated chemical waste liquid is greater than or equal to the preset emission threshold, it is pumped back to the treatment tank 1 with the help of the water pump 20 and the water suction pipe 21 and the waste liquid treatment of the pretreated chemical waste liquid is carried out, and after the treatment, it is re-input into the chemical waste liquid storage tank 16 through the water outlet pipe A5 for judging whether the emission requirements are met, and when the emission requirements are not met, the waste liquid treatment and the emission requirement judgment are repeated until the pretreated chemical waste liquid after the waste liquid treatment meets the emission requirements and then the pumping back to the treatment tank 1 is stopped and it is discharged through the water outlet pipe B19.

[0060] When the emission requirements are not met, it is necessary to withdraw the treatment tank 1 for waste liquid treatment. The process of waste liquid treatment includes: determining the stirring speed at each sampling moment during each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment; during the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment during each waste liquid treatment according to the instantaneous change of turbidity and the relative size of the liquid flow degree with respect to the whole at each sampling moment; and performing waste liquid treatment according to all the stirring speeds and all the cleaning frequencies during each waste liquid treatment process. That is, determining the real-time stirring speed according to the turbidity measured at each sampling moment during each waste liquid treatment process, and determining the real-time cleaning frequency according to the turbidity change and the liquid flow change during the stirring process, so as to perform adaptive treatment on the pretreated chemical waste liquid during each waste liquid treatment process, making the waste liquid treatment more stable. It should be noted that in the embodiment of the present invention, when the emission requirements are not met, that is, before the waste liquid treatment process, 100 ml of water is added through the feed port B18 for dilution, and then it is withdrawn into the treatment tank 1 by means of the water pump 20 and the water suction pipe 21, and then a coagulant is added through the feed port A2 for waste liquid treatment. It should be noted that the amount of water added can be adjusted according to the specific implementation environment. The purpose of adding water is to dilute the heavy metal concentration to a certain extent and make up for the water loss caused by the removal of precipitation.

[0061] Preferably, in some possible implementation manners of the embodiment of the present invention, the process of obtaining the stirring speed includes:

[0062] Determining the speed adjustment range according to the maximum speed of the stirring motor; determining the speed range difference and the minimum speed of the speed adjustment range; taking the product of the normalized value of the turbidity of the pretreated chemical waste liquid at each sampling moment during each iterative waste liquid treatment process and the speed range difference as the speed adjustment value at each sampling moment; and taking the sum value between the minimum speed and the speed adjustment value as the stirring speed at each sampling moment during each waste liquid treatment process. In a specific implementation manner of the embodiment of the present invention, the speed adjustment range is set to 30% - 100% of the maximum speed of the stirring motor, that is, the speed range difference is 70% of the maximum speed, and the minimum speed is 30% of the maximum speed. Determining the speed adjustment range based on the maximum speed can avoid the speed requirement exceeding the maximum speed of the stirring motor, which is more in line with the specific implementation environment. In the implementation process, the specific speed adjustment range can be adjusted according to the specific implementation environment. For the pretreated chemical waste liquid, the higher the turbidity, the higher the required speed is to prevent phenomena such as sticking to the wall, caking or suspension, so that the solid particles are more evenly distributed; and when the turbidity is low, the stirring motor maintains a low speed, so as to achieve the effect of extending the service life of the stirring motor.

[0063] For the process of obtaining the stirring speed, by combining the speed adjustment value determined based on the turbidity with the minimum speed, it can be ensured that the determined stirring speed is necessarily within the speed adjustment range and conforms to the positive correlation between turbidity and stirring speed. In a specific implementation manner of the embodiment of the present invention, the process of obtaining the stirring speed is expressed by the formula: ; where is the stirring speed at the th sampling moment in the th waste liquid treatment process of the pretreated chemical industrial waste liquid; is the minimum speed of the speed adjustment range; is the speed range of the speed adjustment range; is the turbidity at the th sampling moment in the th waste liquid treatment process of the pretreated chemical industrial waste liquid; is the speed adjustment value at the th sampling moment in the th waste liquid treatment process of the pretreated chemical industrial waste liquid.

[0064] Preferably, in some possible implementation manners of the embodiment of the present invention, the process of obtaining the cleaning frequency includes:

[0065] For any waste liquid treatment: each sampling moment in the process of waste liquid treatment in turn is used as the target moment, and all the moments before the target moment are used as the corresponding reference moments; the average value of the liquid flow velocities corresponding to all the reference moments is used as the reference flow velocity; according to the difference between the reference flow velocity and the liquid flow velocity at the target moment, the instantaneous liquid flow comparison value at the target moment is determined. First, for the waste liquid treatment process, the coagulant can precipitate harmful substances and suspended matters to form precipitates, and these precipitates may cause blockages. Therefore, it is necessary to clean the precipitates in time through the cleaning scraper 13, enter the sewage pipe 7, and discharge the precipitates in time through the sewage valve 8 and the sewage pipe 7 after the waste liquid treatment is completed. For the target moment, the greater the liquid flow velocity of all the reference moments before it, the faster the speed of accumulating precipitates will be, so the higher the required cleaning frequency; and the slower the liquid flow velocity at the target moment, it means that the more precipitates accumulate at the target moment, resulting in a greater slowdown in the flow velocity and flow rate, so the corresponding cleaning frequency needs to be increased; therefore, the greater the reference flow velocity and the smaller the liquid flow velocity at the target moment, the greater the demand for the corresponding cleaning frequency, that is, the instantaneous liquid flow comparison value is positively correlated with the cleaning frequency.

[0066] Further, according to the overall turbidity change at all reference times and the instantaneous turbidity change at the target time, a reference value of the deposition rate at the target time is determined. Preferably, in some possible implementation manners of the embodiments of the present invention, the process of obtaining the reference value of the deposition rate includes:

[0067] The difference between the turbidity at each sampling time and the turbidity at the previous sampling time is used as the turbidity change value at each sampling time; the average value of the turbidity change values at all reference times corresponding to the target time is used as the reference change value; the sum value between the reference change value and the turbidity change value at the target time is used as the reference value of the deposition rate at the target time. When the turbidity changes or decreases faster, it indicates that the formation of precipitation is faster, and the required cleaning frequency is greater. Therefore, when the reference change value is greater, the required cleaning frequency is greater; and when the turbidity change value at the target time is smaller, it indicates that the formation of precipitation at the target time is more stable, and the required cleaning frequency is smaller; therefore, taking the turbidity change value at the target time alone as a parameter and adding it to the reference change value increases the weight of the turbidity change at the target time; and when the reference value of the deposition rate is greater, the required cleaning frequency is greater.

[0068] Since the greater the reference value of the deposition rate and the greater the instantaneous comparison value of the liquid flow, the greater the required cleaning frequency, finally, according to the reference value of the deposition rate and the instantaneous comparison value of the liquid flow, the frequency increase weight at the target time is determined; both the reference value of the deposition rate and the instantaneous comparison value of the liquid flow are positively correlated with the frequency increase weight; that is, combining the reference value of the deposition rate and the instantaneous comparison value of the liquid flow to determine a more accurate weight for increasing the cleaning frequency, so that the greater the frequency increase weight, the greater the corresponding cleaning frequency. In a specific implementation manner of the embodiments of the present invention, according to the normalized value of the product between the reference value of the deposition rate and the instantaneous comparison value of the liquid flow, the frequency increase weight at the target time is determined, and the value of the frequency increase weight is limited between 0 and 1 through normalization. In a specific implementation manner of the embodiments of the present invention, the normalization method in the normalization process adopts linear normalization and can be adjusted by itself.

[0069] Since the higher the frequency increase weight, the greater the required cleaning frequency, the cleaning frequency at the target time is finally determined according to the frequency increase weight in combination with the preset standard cleaning frequency. In a specific implementation manner of the embodiment of the present invention, the product of the preset standard cleaning frequency and the frequency increase weight is used as the cleaning frequency increase value at the target time; the cleaning frequency at the target time is determined according to the sum value between the cleaning frequency increase value and the preset standard cleaning frequency; in the embodiment of the present invention, the preset standard cleaning frequency is set to 50% of the maximum cleaning frequency, so that the cleaning frequency obtained by combining the cleaning frequency increase value and the preset standard cleaning frequency will not exceed the maximum cleaning frequency and conforms to the relationship between the load cleaning frequency and the frequency increase weight.

[0070] In a specific implementation manner of the embodiment of the present invention, the process of obtaining the cleaning frequency is expressed by the formula: ; where is the cleaning frequency at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid; is the preset standard cleaning frequency; is the reference flow velocity at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid, that is, the average value of the liquid flow velocities of all reference moments corresponding to the th sampling moment; is the liquid flow velocity at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid; is the instantaneous liquid flow comparison value at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid; is the reference change value at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid, that is, the average value of the turbidity change values of all sampling moments before the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid; is the turbidity change value at the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid, that is, the turbidity of the th sampling moment in the th waste liquid treatment process of the pretreated chemical waste liquid relative to the turbidity of the previous sampling moment; it should be noted that the turbidity change value at the first sampling moment is set to 0. is the reference value of the deposition rate at the th sampling moment during the th waste liquid treatment process for the pretreated chemical waste liquid; is the frequency increase weight at the th sampling moment during the th waste liquid treatment process for the pretreated chemical waste liquid; is the increased value of the cleaning frequency at the th sampling moment during the th waste liquid treatment process for the pretreated chemical waste liquid.

[0071] In a specific implementation manner of the embodiment of the present invention, the product of the negative correlation mapping value of the frequency increase weight and the maximum aperture of the double-layer filter screen 112 is used as the real-time adjustable aperture of the double-layer filter screen 112 at each sampling moment, so as to adaptively adjust the aperture size according to the real-time accumulation situation of impurities on the filter screen surface. That is, the greater the cleaning frequency, the more impurities are accumulated on the filter screen surface, and the more necessary it is to reduce the filter screen aperture for cleaning. In a specific implementation manner of the embodiment of the present invention, the process of obtaining the aperture size of the double-layer filter screen 112 at each sampling moment is expressed by the formula: ; where is the aperture size of the double-layer filter screen 112 at the th sampling moment during the th waste liquid treatment process; is the frequency increase weight at the th sampling moment during the th waste liquid treatment process for the pretreated chemical waste liquid, and its value range is from 0 to 1. Since it has a negative correlation with the aperture size of the double-layer filter screen 112, negative correlation mapping is performed by subtracting this value from the real number 1, is the maximum adjustable aperture size of the double-layer filter screen 112.

[0072] So far, during each waste liquid treatment process, the cleaning frequency and stirring speed at each sampling moment have been obtained. Correspondingly, the rotation speed of the stirring motor at each sampling moment is adjusted in real time to the corresponding stirring speed, and the cleaning scraper is adjusted to the corresponding cleaning frequency.

[0073] This application also provides a chemical waste liquid treatment process, including the following steps:

[0074] Obtain the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process and the liquid flow degree and turbidity at each sampling moment during the waste liquid treatment process;

[0075] According to the concentration data of each heavy metal in the pretreated chemical waste liquid, it is judged whether the pretreated chemical waste liquid meets the discharge requirements. When the pretreated chemical waste liquid does not meet the discharge requirements, the pretreated chemical waste liquid is pumped back into the treatment tank and the waste liquid treatment of the pretreated chemical waste liquid is repeated, and after the waste liquid treatment, it is repeatedly input into the chemical waste liquid temporary storage tank through the water outlet pipe A until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pretreated chemical waste liquid is discharged;

[0076] The process of the waste liquid treatment is as follows: according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment, the stirring speed at each sampling moment in each waste liquid treatment is determined; during the process of stirring the pretreated chemical waste liquid at the stirring speed, according to the instantaneous change of the turbidity and the relative size of the liquid flow degree to the whole at each sampling moment, the cleaning frequency at each sampling moment in each waste liquid treatment is determined; the waste liquid treatment is carried out according to all the stirring speeds and all the cleaning frequencies in each waste liquid treatment process.

[0077] Since the data processing process of a chemical waste liquid treatment process has been described in detail in the above embodiments of a chemical waste liquid treatment device, it will not be further elaborated.

[0078] In summary, the present application first judges the discharge requirements by means of the overall size of the concentration data of the heavy metals monitored by the heavy metal detector; when the discharge requirements are not met, the pretreated chemical waste liquid is pumped back into the treatment tank, and the stirring speed with better stirring effect is determined according to the turbidity of the pretreated chemical waste liquid, and the cleaning frequency is adjusted in real time in combination with the instantaneous change of the turbidity and the relative size of the liquid flow degree to the whole, so as to perform adaptive treatment on the pretreated chemical waste liquid, and solve the problems that when a large amount of solid impurities appear during the fusion of the chemical waste liquid and the coagulant liquid, it may cause greater pressure on the cleaning scraper and lead to the blockage of the sewage discharge pipe, and it is impossible to accurately judge whether the treated waste liquid meets the discharge standard, making the treatment effect of the chemical waste liquid better.

[0079] It should be noted that: the above sequence of the embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0080] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the differences from other embodiments.

Claims

1. A chemical waste liquid treatment device, characterized in that, It includes an inlet pipe, a treatment tank, an outlet pipe A, a chemical waste liquid temporary storage tank, a data sensor group, a heavy metal detector, and a control module; the treatment tank is connected to the chemical waste liquid temporary storage tank through the outlet pipe A; the chemical waste liquid to be treated enters the treatment tank through the inlet pipe, and after pretreatment in the treatment tank, the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage tank through the outlet pipe A; the heavy metal detector is located in the chemical waste liquid temporary storage tank, the data sensor group is installed in the treatment tank, and the data sensor group includes a turbidity sensor, a flow rate sensor, and a flow velocity sensor; the heavy metal detector is used to detect the concentration data of each heavy metal, the flow rate sensor group is used to detect the flow rate of the liquid on the surface of the double-layer filter screen in the treatment tank, and the flow velocity sensor group is used to detect the flow velocity of the liquid on the surface of the double-layer filter screen in the treatment tank; the turbidity sensor is used to collect the turbidity of the pretreated chemical waste liquid in the treatment tank; the heavy metal detector, the flow rate sensor, the flow velocity sensor, and the turbidity sensor are all signal-connected to the control module; the control module is used to obtain the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process, as well as the liquid flow degree and turbidity at each sampling moment during the waste liquid treatment process; According to the concentration data of each heavy metal in the pretreated chemical waste liquid, it is judged whether the pretreated chemical waste liquid meets the discharge requirements. When the pretreated chemical waste liquid does not meet the discharge requirements, the pretreated chemical waste liquid is pumped back into the treatment tank and the waste liquid treatment of the pretreated chemical waste liquid is repeated, and after the waste liquid treatment, it is repeatedly input into the chemical waste liquid temporary storage tank through the outlet pipe A until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pretreated chemical waste liquid is discharged; The process of the waste liquid treatment is as follows: according to the turbidity size of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment, the stirring speed at each sampling moment in each waste liquid treatment is determined; during the process of stirring the pretreated chemical waste liquid at the stirring speed, according to the instantaneous change of the turbidity and the size of the liquid flow degree relative to the whole at each sampling moment, the cleaning frequency at each sampling moment in each waste liquid treatment is determined; Waste liquid treatment is carried out according to all the stirring speeds and all the cleaning frequencies in each waste liquid treatment process; The process of obtaining the stirring speed includes: Determine the speed adjustment range according to the maximum speed of the stirring motor; determine the speed range difference and the minimum speed of the speed adjustment range; Take the product of the normalized value of the turbidity of the pretreated chemical waste liquid at each sampling moment in each iterative waste liquid treatment process and the speed range difference as the speed adjustment value at each sampling moment; Take the sum value between the minimum speed and the speed adjustment value as the stirring speed at each sampling moment in each waste liquid treatment process; The process of obtaining the cleaning frequency includes: For any waste liquid treatment: Each sampling moment in the process of sequential waste liquid treatment is used as the target moment, and all the moments before the target moment are used as the corresponding reference moments; The mean value of the liquid flow degrees corresponding to all reference times is used as the reference flow velocity; according to the difference between the reference flow velocity and the liquid flow degree at the target time, the instantaneous liquid flow comparison value at the target time is determined. According to the overall turbidity change situation of all reference times and the instantaneous turbidity change situation at the target time, the sedimentation rate reference value at the target time is determined; the acquisition process of the sedimentation rate reference value includes: The difference between the turbidity at each sampling time and the turbidity at the previous sampling time is used as the turbidity change value at each sampling time. The mean value of the turbidity change values corresponding to all reference times at the target time is used as the reference change value. The sum value between the reference change value and the turbidity change value at the target time is used as the sedimentation rate reference value at the target time. According to the sedimentation rate reference value and the instantaneous liquid flow comparison value, the frequency increase weight at the target time is determined; both the sedimentation rate reference value and the instantaneous liquid flow comparison value are positively correlated with the frequency increase weight; the acquisition process of the frequency increase weight includes: According to the normalized value of the product between the sedimentation rate reference value and the instantaneous liquid flow comparison value, the frequency increase weight at the target time is determined. According to the frequency increase weight and in combination with the preset standard cleaning frequency, the cleaning frequency at the target time is determined; the determining of the cleaning frequency at the target time according to the frequency increase weight and in combination with the preset standard cleaning frequency includes: The product between the preset standard cleaning frequency and the frequency increase weight is used as the cleaning frequency increase value at the target time. According to the sum value between the cleaning frequency increase value and the preset standard cleaning frequency, the cleaning frequency at the target time is determined.

2. The chemical waste liquid treatment equipment according to claim 1, characterized in that, The discharge requirements include: According to the overall magnitudes of the concentrations of various heavy metals in the pretreated chemical waste liquid, the corresponding heavy metal concentration reference values are determined; the discharge requirement is that the heavy metal concentration reference value is less than the preset discharge threshold.

3. The chemical waste liquid treatment equipment according to claim 2, characterized in that, The acquisition process of the heavy metal concentration reference value includes: The normalized value of the cumulative value of the concentration data of all types of heavy metals is used as the corresponding heavy metal concentration reference value.

4. A chemical waste liquid treatment device according to claim 1, characterized in that, The acquisition process of the liquid flow degree includes: The product of the flow velocity and the flow rate of the liquid on the surface of the double-layer filter screen at each sampling time is used as the corresponding liquid flow degree.

5. A chemical waste liquid treatment process, characterized in that, It includes the following steps: Obtain the concentration data of each heavy metal in the pretreated chemical waste liquid before each waste liquid treatment process, as well as the liquid flow degree and turbidity at each sampling time during the waste liquid treatment process. According to the concentration data of each heavy metal in the pretreated chemical waste liquid, determine whether the pretreated chemical waste liquid meets the discharge requirements. When the pretreated chemical waste liquid does not meet the discharge requirements, pump the pretreated chemical waste liquid back to the treatment tank and repeat the waste liquid treatment of the pretreated chemical waste liquid, and input the chemical waste liquid into the chemical waste liquid temporary storage tank again through the water outlet pipe A after the waste liquid treatment, until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pretreated chemical waste liquid is discharged. The process of the waste liquid treatment is as follows: According to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment, determine the stirring speed at each sampling moment in each waste liquid treatment; During the process of stirring the pretreated chemical waste liquid at the stirring speed, according to the instantaneous change of turbidity and the relative size of the liquid flow degree at each sampling moment with respect to the whole, determine the cleaning frequency at each sampling moment in each waste liquid treatment; Carry out waste liquid treatment according to all the stirring speeds and all the cleaning frequencies in each waste liquid treatment process; The process of obtaining the stirring speed includes: Determine the speed adjustment range according to the maximum speed of the stirring motor; Determine the speed range and the minimum speed value of the speed adjustment range; Take the product of the normalized value of the turbidity of the pretreated chemical waste liquid at each sampling moment in each iterative waste liquid treatment process and the speed range as the speed adjustment value at each sampling moment; Take the sum value between the minimum speed value and the speed adjustment value as the stirring speed at each sampling moment in each waste liquid treatment process; The process of obtaining the cleaning frequency includes: For any waste liquid treatment: Take each sampling moment in the process of successive waste liquid treatment as the target moment, and take all the moments before the target moment as the corresponding reference moments; Take the average value of the liquid flow degrees corresponding to all the reference moments as the reference flow velocity; According to the difference between the reference flow velocity and the liquid flow degree at the target moment, determine the instantaneous liquid flow comparison value at the target moment; According to the overall turbidity change situation of all the reference moments and the instantaneous turbidity change situation at the target moment, determine the sedimentation rate reference value at the target moment; The process of obtaining the sedimentation rate reference value includes: Take the difference between the turbidity at each sampling moment and the turbidity at the previous sampling moment as the turbidity change value at each sampling moment; Take the average value of the turbidity change values corresponding to all the reference moments of the target moment as the reference change value; Take the sum value between the reference change value and the turbidity change value at the target moment as the sedimentation rate reference value at the target moment; According to the sedimentation rate reference value and the instantaneous liquid flow comparison value, determine the frequency increase weight at the target moment; Both the sedimentation rate reference value and the instantaneous liquid flow comparison value are positively correlated with the frequency increase weight; The process of obtaining the frequency increase weight includes: Determine the frequency increase weight at the target moment according to the normalized value of the product between the sedimentation rate reference value and the instantaneous liquid flow comparison value; Determine the cleaning frequency at the target moment according to the frequency increase weight combined with the preset standard cleaning frequency; The determination of the cleaning frequency at the target moment according to the frequency increase weight combined with the preset standard cleaning frequency includes: Take the product of the preset standard cleaning frequency and the frequency increase weight as the cleaning frequency increase value at the target moment; Determine the cleaning frequency at the target moment according to the sum value between the cleaning frequency increase value and the preset standard cleaning frequency.

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