Chemical waste liquid treatment equipment and treatment process

Abstract

The invention relates to the technical field of sewage treatment, in particular to chemical waste liquid treatment equipment and a chemical waste liquid treatment process. Firstly, according to the overall size of concentration data, monitored by a heavy metal detector, of heavy metal, discharge requirements are judged; when the discharge requirement is not met, the pretreated chemical waste liquid is pumped back to the treatment tank, the stirring rotating speed with the better stirring effect is determined according to the turbidity of the pretreated chemical waste liquid, and the sweeping frequency is adjusted in real time according to the instantaneous change of the turbidity and the liquid circulation degree relative to the overall size; therefore, self-adaptive treatment is carried out on the pretreated chemical waste liquid, and the problems that when a large number of solid impurities appear when the chemical waste liquid and the coagulation liquid are fused, large pressure is possibly caused to a sweeping scraper, a blow-off pipeline is blocked, and whether the treated waste liquid meets the discharge standard or not cannot be accurately judged are solved. And the chemical waste liquid treatment effect is better.

Description

Technical Field

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

[0002] In 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 not properly treated and purified but directly discharged, they will have extremely serious impacts on the natural environment and even affect the lives and safety of residents around the basin. Therefore, chemical waste liquids need to be treated.

[0003] The patent document with publication number CN214571200U in the prior art discloses a waste liquid treatment equipment for chemical environmental protection. The equipment mixes the waste liquid and the coagulant liquid fully by stirring, so that a reaction occurs to produce a precipitate, which is then intercepted by a filter screen, and finally a cleaning scraper is used to remove and collect the precipitate on the surface of the filter screen. Finally, the impurities and harmful substances that are condensed into blocks are discharged through a sewage pipe, and the waste water is discharged from the drain outlet; however, the equipment is only provided with one sewage pipe for discharging impurities and wastes. Therefore, when the chemical waste liquid and the coagulant liquid are merged to produce a large amount of solid impurities, it may cause a large pressure on the cleaning scraper and cause the sewage pipe to be blocked, and it is impossible to accurately judge whether the treated waste liquid meets the emission standards, resulting in poor treatment effect of the chemical waste liquid. Summary of the invention

[0004] The present application provides a chemical waste liquid treatment device, comprising an inlet pipe, a treatment tank, an outlet pipe A, a chemical waste liquid temporary storage box, a data sensor group, a heavy metal detector, and a control module; the treatment tank is connected to the chemical waste liquid temporary storage box through the outlet pipe A; the chemical waste liquid to be treated enters the treatment tank through the inlet pipe, and after being pre-treated in the treatment tank, the pre-treated chemical waste liquid is input into the chemical waste liquid temporary storage box through the outlet pipe A; the heavy metal detector is located in the chemical waste liquid temporary storage box, the data sensor group is installed in the treatment tank, and 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, and the flow rate sensor group is used to detect the flow rate 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 pre-treated chemical waste liquid in the treatment tank; the heavy metal detector, flow sensor, flow rate sensor and turbidity sensor are all connected to the control module by signal; the control module is used to obtain the concentration data of each heavy metal in the pre-treated chemical waste liquid before each waste liquid treatment process and the liquid circulation degree and turbidity at each sampling time during the waste liquid treatment process; According to the concentration data of each heavy metal in the pre-treated chemical waste liquid, it is judged whether the pre-treated chemical waste liquid meets the discharge requirements. When the pre-treated chemical waste liquid does not meet the discharge requirements, the pre-treated chemical waste liquid is drawn back to the treatment tank and the pre-treated chemical waste liquid is repeatedly treated with waste liquid, and the waste liquid after the treatment is repeatedly input into the chemical waste liquid temporary storage box through the outlet pipe A until the pre-treated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pre-treated chemical waste liquid is discharged; The waste liquid treatment process is as follows: determining the stirring speed at each sampling moment in each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the liquid circulation degree relative to the whole; and performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process.

[0005] Furthermore, the emission requirements include: According to the overall size of various heavy metal concentrations in the pretreated chemical waste liquid, the corresponding heavy metal concentration reference value is determined; the emission requirement is that the heavy metal concentration reference value is less than a preset emission threshold.

[0006] Furthermore, the process of obtaining the heavy metal concentration reference value includes: The normalized value of the accumulated values ​​of the concentration data of all types of heavy metals is used as the corresponding heavy metal concentration reference value.

[0007] Furthermore, 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 of the speed adjustment range; 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 rotation speed range is used as the rotation speed adjustment value at each sampling moment; The sum of the minimum speed value and the speed adjustment value is used as the stirring speed at each sampling time in each waste liquid treatment process.

[0008] Furthermore, the process of obtaining the liquid circulation degree includes: The product of the flow velocity and flow rate of the liquid on the filter surface at each sampling moment is taken as the corresponding liquid circulation velocity.

[0009] Furthermore, the process of obtaining the cleaning frequency includes: For any waste liquid treatment: Each sampling moment in the process of waste liquid treatment is taken as the target moment, and all moments before the target moment are taken as the corresponding reference moments; The average of the liquid circulation velocities corresponding to all reference moments is used as the reference circulation velocity; and the instantaneous contrast value of the liquid circulation at the target moment is determined according to the difference between the reference circulation velocity and the liquid circulation velocity at the target moment; Determine the sedimentation rate reference value at the target time based on the overall turbidity change at all reference times and the instantaneous turbidity change at the target time; Determining a frequency increase weight at a target time according to the deposition rate reference value and the liquid circulation instantaneous comparison value; the deposition rate reference value and the liquid circulation instantaneous comparison value are both positively correlated with the frequency increase weight; The cleaning frequency at the target time is determined according to the frequency increase weight combined with a preset standard cleaning frequency.

[0010] Furthermore, the process of obtaining the deposition rate reference value includes: The difference between the turbidity at each sampling moment and the turbidity at the previous sampling moment is taken as the turbidity change value at each sampling moment; The average of the turbidity change values ​​at all reference times corresponding to the target time is taken as the reference change value; The sum of 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.

[0011] Furthermore, the process of obtaining the frequency increase weight includes: The frequency increase weight at the target time is determined according to a normalized value of the product between the deposition rate reference value and the liquid circulation instantaneous contrast value.

[0012] Further, the determining the cleaning frequency at the target time according to the frequency increase weight combined with a preset standard cleaning frequency includes: 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 of the cleaning frequency increase value and the preset standard cleaning frequency.

[0013] A chemical waste liquid treatment process comprises the following steps: Obtain the concentration data of each heavy metal in the pre-treated 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 pre-treated chemical waste liquid, it is judged whether the pre-treated chemical waste liquid meets the discharge requirements. When the pre-treated chemical waste liquid does not meet the discharge requirements, the pre-treated chemical waste liquid is drawn back to the treatment tank and the pre-treated chemical waste liquid is repeatedly treated with waste liquid, and the waste liquid after the treatment is repeatedly input into the chemical waste liquid temporary storage box through the outlet pipe A until the pre-treated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pre-treated chemical waste liquid is discharged; The waste liquid treatment process is as follows: determining the stirring speed at each sampling moment in each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the liquid circulation degree relative to the whole; and performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process.

[0014] This application has the following beneficial effects: Firstly, the emission requirements are judged with the help of the overall size of the heavy metal concentration data monitored by the heavy metal detector; when the emission requirements are not met, the pretreated chemical waste liquid is pumped back to 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 turbidity and the degree of liquid circulation relative to the overall size, so as to adaptively treat the pretreated chemical waste liquid, solve the problem that when the chemical waste liquid is merged with the coagulant liquid and a large amount of solid impurities appear, it may cause greater pressure on the cleaning scraper and cause blockage of the sewage pipe, and it is impossible to accurately judge whether the treated waste liquid meets the emission standards, so that the effect of chemical waste liquid treatment is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention provides an overall structural diagram of a chemical waste liquid treatment device according to an embodiment of the present invention.

[0017] Figure 1The numbers in it are: 1. treatment tank; 2. feed port 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 box; 17. heavy metal detector; 18. feed port B; 19. water outlet pipe B; 20. water pump; 21. water pipe. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a chemical waste liquid treatment equipment and treatment process proposed according to the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does 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 number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features.

[0019] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0020] The specific scheme of a chemical waste liquid treatment equipment and treatment process provided by the present invention is described in detail below with reference to the accompanying drawings.

[0021] This application provides a chemical waste liquid treatment equipment, please refer to Figure 1 , which shows a schematic diagram of the overall structure of a chemical waste liquid treatment equipment provided by an embodiment of the present invention, including: a treatment tank 1, a feed port A2, a water inlet pipe 3, a motor 4, a water outlet pipe A5, 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 box 16, a heavy metal detector 17, a feed port B18, a water outlet pipe B19, a water pump 20 and a water pump pipe 21.

[0022] The treatment tank 1 is connected to the chemical waste liquid temporary storage box 16 through the outlet pipe A5; the chemical waste liquid to be treated enters the treatment tank 1 through the inlet pipe 3, and after being pre-treated in the treatment tank 1, the pre-treated chemical waste liquid is input into the chemical waste liquid temporary storage box 16 through the outlet pipe A5; the heavy metal detector 17 is located in the chemical waste liquid temporary storage box 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 rate 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 1, and the flow rate sensor group is used to detect the flow rate of the liquid on the surface of the filter screen in the treatment tank 1; the turbidity sensor is used to collect the turbidity of the pre-treated chemical waste liquid in the treatment tank 1; the heavy metal detector, flow sensor, flow rate sensor and turbidity sensor are all connected to the control module by signal. The control module can be a data processing chip such as a CPU, MCU, or a data processing device such as a computer host, and the corresponding output ends of the heavy metal detector, flow sensor, flow velocity sensor and turbidity sensor are connected to the input end of the control module. Wired connection can be achieved through a data transmission line, and wireless connection can also be achieved through wireless communication methods such as Bluetooth and WiFi.

[0023] First, in the initial state, there is no chemical waste liquid in the treatment tank 1 and the chemical waste liquid temporary storage box 16. The chemical waste liquid to be treated enters the treatment tank 1 through the water inlet pipe 3, and is preliminarily filtered through the uppermost single-layer filter screen 111 to remove the impurity solids present in the chemical waste liquid, and before the chemical waste liquid to be treated is input, the aperture of the double-layer filter screen 112 is controlled to be reduced to be completely closed, so that the chemical waste liquid to be treated cannot pass through the double-layer filter screen 112 before the coagulant and the chemical waste liquid are mixed; then the coagulant is input through the feed port A2 to mix with the chemical waste liquid to be treated, the aperture of the double-layer filter screen is adjusted to the maximum, and the 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 with the help of the outlet valve 6 Input the pretreated chemical waste liquid into the chemical waste liquid temporary storage box 16 through the outlet pipe A5; then measure the concentration data of each heavy metal in the pretreated chemical waste liquid through the heavy metal detector, and input the concentration data into the control module to determine whether it meets the discharge requirements. When the discharge requirements are met, it is discharged through the outlet pipe B19 with the help of the water valve on the outlet pipe B19; when the discharge requirements are not met, it is re-input back to the treatment tank 1 with the help of the pump 20 and the pump pipe 21, and after the waste liquid treatment process, the pretreated chemical waste liquid is input into the chemical waste liquid temporary storage box 16 through the outlet pipe A5 with the help of the outlet valve 6, and the discharge requirements are judged again, and when the discharge requirements are not met, the circulating waste liquid treatment is continued until the discharge requirements are met and it is discharged through the outlet pipe B19 with the help of the water valve on the outlet pipe B19.

[0024] 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.

[0025] In a specific implementation of an 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 box 16, the concentration data of each heavy metal in the pretreated chemical waste liquid is measured by a heavy metal detector, that is, the concentration data of each heavy metal before each waste liquid treatment process is obtained. In a specific implementation of an 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 number of the above-mentioned heavy metals, which will not be further elaborated here. It should be noted that all data collected in the embodiment of the present invention are normalized values ​​to prevent the influence of different dimensions in the calculation process.

[0026] In a specific implementation of an embodiment of the present invention, after the pretreated chemical waste liquid is completely input into the treatment tank 1 from the chemical waste liquid temporary storage box 16, the flow rate at each sampling moment in the waste liquid treatment process is collected by the flow sensor in the data sensor group 10, the flow rate at each sampling moment in the waste liquid treatment process is collected by the flow rate 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 in each waste liquid treatment process is obtained, and then the degree of liquid circulation at each sampling moment in the waste liquid treatment process is determined in combination with the flow rate and flow rate.

[0027] Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the liquid circulation velocity includes: The product of the flow velocity and the flow rate of the liquid on the filter surface at each sampling moment is taken as the corresponding liquid circulation velocity. It should be noted that, in addition to the product, the implementer can also calculate the liquid circulation velocity by other methods according to the correlation, such as the mean value, the normalized value of the sum value, etc., which will not be further elaborated here.

[0028] After the chemical waste liquid to be treated passes through the treatment tank 1, the obtained pre-treated chemical waste liquid is input into the chemical waste liquid temporary storage box 16, and the concentration data of each heavy metal in the pre-treated chemical waste liquid is used to determine whether the pre-treated chemical waste liquid meets the discharge requirements. For chemical waste liquid, the heavy metal substances therein will cause serious pollution to the environment, so the concentration of heavy metals determines whether it can be discharged.

[0029] Preferably, in some possible implementations of the embodiments of the present invention, the emission requirements include: According to the overall size of various heavy metal concentrations in the pretreated chemical waste liquid, the corresponding heavy metal concentration reference value is determined; the emission requirement is that the heavy metal concentration reference value is less than the preset emission threshold; that is, when the heavy metal concentration reference value is less than the preset emission threshold, it means that the emission requirement is met, otherwise it means that the emission requirement is not met.

[0030] Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the heavy metal concentration reference value includes: The normalized value of the accumulated values ​​of all types of heavy metal concentration data is used as the corresponding heavy metal concentration reference value. The larger the accumulated value of all types of heavy metal concentration data is, the higher the concentration of heavy metals is, the more further treatment is needed, and the less it meets the emission requirements.

[0031] In a specific implementation of the embodiment of the present invention, the process of obtaining the heavy metal concentration reference value is expressed by the formula: ;in, It is the reference value of heavy metal concentration in pre-treated chemical wastewater; The concentration data of each heavy metal in the pre-treated chemical wastewater; The normalization function limits the calculated heavy metal concentration reference value to a range of 0 to 1, so as to make a more intuitive judgment on the emission requirements. In a specific implementation of the embodiment of the present invention, the preset emission threshold is set to 0.57, which can be adjusted according to the specific implementation environment.

[0032] Furthermore, when the pretreated chemical waste liquid does not meet the discharge requirements, the pretreated chemical waste liquid is pumped back to the treatment tank and the pretreated chemical waste liquid is repeatedly treated, and the pretreated chemical waste liquid after the waste liquid treatment 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. Specifically: when the pretreated chemical waste liquid meets the discharge requirements, that is, when the heavy metal concentration reference value of the pretreated chemical waste liquid is less than the preset discharge threshold, the pretreated chemical waste liquid is directly discharged through the outlet pipe B19; on the contrary, when the pretreated chemical waste liquid does not meet the discharge requirements, that is, when the heavy metal concentration reference value of the pretreated chemical waste liquid is greater than or equal to the preset discharge threshold, the pretreated chemical waste liquid is pumped back to the treatment tank 1 with the help of the pump 20 and the pump pipe 21, and the pretreated chemical waste liquid is treated, and after treatment, it is re-input into the chemical waste liquid temporary storage box 16 through the outlet pipe A5 to judge whether the discharge requirements are met, and when the discharge requirements are not met, the waste liquid treatment and discharge requirement judgment are repeated until the pretreated chemical waste liquid after the waste liquid treatment meets the discharge requirements and stops being pumped back to the treatment tank 1, and is discharged through the outlet pipe B19.

[0033] When the discharge 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 in each waste liquid treatment according to the turbidity of the pre-treated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pre-treated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the size of the liquid circulation degree relative to the whole; performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process. That is, the real-time stirring speed is determined according to the turbidity measured at each sampling moment in each waste liquid treatment process, and the real-time cleaning frequency is determined according to the turbidity change and liquid circulation change during the stirring process, so that the pre-treated chemical waste liquid in each waste liquid treatment process is adaptively treated, so that the stability of waste liquid treatment is higher. It should be noted that, in the embodiment of the present invention, when the discharge requirements are not met, that is, before the waste liquid treatment process is carried out, 100 ml of water is added through the feed port B18 for dilution, and the waste liquid is pumped back to the treatment tank 1 with the help of the water pump 20 and the water pipe 21, and then the 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 to make up for the water loss caused by the removal of precipitation.

[0034] Preferably, in some possible implementations of the embodiments of the present invention, 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 of the speed adjustment range; take the product of the normalized value of the turbidity of the pre-treated 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 between the minimum speed and the speed adjustment value as the stirring speed at each sampling moment in each waste liquid treatment process. In a specific implementation of an 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 is 70% of the maximum speed, and the minimum speed is 30% of the maximum speed. The speed adjustment range is determined based on the maximum speed, which can avoid the speed demand exceeding the maximum speed of the stirring motor, and is more in line with the specific implementation environment. During the implementation process, the specific speed adjustment range can be adjusted according to the specific implementation environment. For pre-treated chemical waste liquid, the higher the turbidity, the higher the speed required, so as to prevent the occurrence of wall sticking, agglomeration or suspension, so that the solid particles are more evenly distributed; and when the turbidity is low, the stirring motor maintains a low speed, thereby achieving the effect of extending the service life of the stirring motor.

[0035] For the process of obtaining the stirring speed, by combining the speed adjustment value determined based on the turbidity with the minimum speed value, the determined stirring speed can be ensured to be within the speed adjustment range and conform to the positive correlation between turbidity and stirring speed. In a specific implementation of the embodiment of the present invention, the process of obtaining the stirring speed is expressed by the formula: ;in, To pre-treat chemical wastewater in The first waste liquid treatment process Stirring speed at each sampling time; The minimum speed value of the speed adjustment range; The speed difference of the speed adjustment range; To pre-treat chemical wastewater in The first waste liquid treatment process Turbidity at the sampling time; To pre-treat chemical wastewater in The first waste liquid treatment process The speed adjustment value at the sampling moment.

[0036] Preferably, in some possible implementations of the embodiments of the present invention, the process of acquiring the sweeping frequency includes: For any waste liquid treatment: each sampling moment in the process of waste liquid treatment is taken as the target moment, and all moments before the target moment are taken as the corresponding reference moments; the average of the liquid circulation velocities corresponding to all reference moments is taken as the reference circulation velocity; according to the difference between the reference circulation velocity and the liquid circulation velocity at the target moment, the instantaneous comparison value of liquid circulation at the target moment is determined. Firstly, for the waste liquid treatment process, the coagulant can precipitate harmful substances and suspended solids to form precipitates, which may cause blockages, so 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 with the help of the sewage valve 8 and the sewage pipe 7 after the waste liquid treatment is completed. For the target moment, the greater the liquid circulation velocity of all previous reference moments, the faster the accumulation of sedimentation will be, and therefore the higher the required cleaning frequency will be; and the slower the liquid circulation velocity at the target moment, the more sedimentation will accumulate at the target moment, causing the flow rate and flow rate to slow down more, so the corresponding cleaning frequency needs to be increased; therefore, the greater the reference circulation velocity and the smaller the liquid circulation velocity at the target moment, the greater the corresponding cleaning frequency demand, that is, the instantaneous contrast value of liquid circulation is positively correlated with the cleaning frequency.

[0037] Further, according to the overall turbidity change at all reference moments and the instantaneous turbidity change at the target moment, the sedimentation rate reference value at the target moment is determined. Preferably, in some possible implementations of the embodiments of the present invention, the process of obtaining the sedimentation rate reference value includes: The difference between the turbidity at each sampling moment and the turbidity at the previous sampling moment is taken as the turbidity change value at each sampling moment; the average of the turbidity change values ​​at all reference moments corresponding to the target moment is taken as the reference change value; the sum of the reference change value and the turbidity change value at the target moment is taken as the sedimentation rate reference value at the target moment. The faster the turbidity changes or decreases, the faster the precipitation is formed, and the greater the cleaning frequency required. Therefore, the larger the reference change value, the greater the cleaning frequency required; and the smaller the turbidity change value at the target moment, the more stable the precipitation is formed at the target moment, and the smaller the cleaning frequency required; therefore, the turbidity change value at the target moment is taken as a parameter alone and added to the reference change value to increase the turbidity change weight at the target moment; and the larger the sedimentation rate reference value, the greater the cleaning frequency required.

[0038] Since the larger the deposition rate reference value is, the larger the instantaneous contrast value of liquid circulation is, the larger the required cleaning frequency is, therefore, finally, the frequency increase weight at the target moment is determined according to the deposition rate reference value and the instantaneous contrast value of liquid circulation; the deposition rate reference value and the instantaneous contrast value of liquid circulation are both positively correlated with the frequency increase weight; that is, the deposition rate reference value and the instantaneous contrast value of liquid circulation are combined to determine a more accurate cleaning frequency increase weight, so that the larger the frequency increase weight is, the larger the corresponding cleaning frequency is. In a specific implementation of an embodiment of the present invention, the frequency increase weight at the target moment is determined according to the normalized value of the product of the deposition rate reference value and the instantaneous contrast value of liquid circulation, and the value of the frequency increase weight is limited to 0 to 1 through normalization. In a specific implementation of an embodiment of the present invention, the normalization method of the normalization process adopts linear normalization, which can be adjusted by itself.

[0039] Since the larger the frequency increase weight is, the larger the required cleaning frequency is, the cleaning frequency at the target moment is finally determined based on the frequency increase weight combined with the preset standard cleaning frequency. In a specific implementation of an 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 moment; the cleaning frequency at the target moment is determined based on the sum of the cleaning frequency increase value and the preset standard cleaning frequency; the embodiment of the present invention sets the preset standard cleaning frequency 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 does not exceed the maximum cleaning frequency, and the relationship between the load cleaning frequency and the frequency increase weight is established.

[0040] In a specific implementation of the embodiment of the present invention, the process of obtaining the sweeping frequency is expressed by the formula: ;in, To pre-treat chemical wastewater in The first waste liquid treatment process The cleaning frequency at each sampling moment; It is the preset standard cleaning frequency; To pre-treat chemical wastewater in The first waste liquid treatment process The reference flow velocity at the sampling time, that is, The mean of the liquid circulation velocity at all reference times corresponding to the sampling time; To pre-treat chemical wastewater in The first waste liquid treatment process Liquid flow rate at each sampling moment; To pre-treat chemical wastewater in The first waste liquid treatment process Instantaneous comparison value of liquid flow at each sampling moment; To pre-treat chemical wastewater in The first waste liquid treatment process The reference change value at the sampling time, that is, the pre-treated chemical waste liquid at the The first waste liquid treatment process The mean of the turbidity change values ​​at all sampling times before the sampling time; To pre-treat chemical wastewater in The first waste liquid treatment process The turbidity change value at the sampling time, that is, the turbidity change value of the pretreated chemical waste liquid at the The first waste liquid treatment process The turbidity at a sampling moment is relative to the turbidity at the previous sampling moment; it should be noted that the turbidity change value at the first sampling moment is set to 0. To pre-treat chemical wastewater in The first waste liquid treatment process The reference value of the deposition rate at each sampling moment; To pre-treat chemical wastewater in The first waste liquid treatment process The frequency of each sampling moment increases the weight; To pre-treat chemical wastewater in The first waste liquid treatment process The increase in cleaning frequency at each sampling moment.

[0041] In a specific implementation 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 112 is used as the real-time control aperture of the double-layer filter 112 at each sampling moment, so as to adaptively adjust the aperture size according to the real-time accumulation of impurities on the filter surface, that is, the greater the cleaning frequency, the more impurities are accumulated on the filter surface, and the more it is necessary to reduce the filter aperture for cleaning. In a specific implementation of the embodiment of the present invention, the process of obtaining the aperture size of the double-layer filter 112 at each sampling moment is expressed by the formula: ;in, For double-layer filter 112 in the first The first waste liquid treatment process The aperture size at each sampling moment; To pre-treat chemical wastewater in The first waste liquid treatment process The frequency at each sampling moment increases the weight, and its value range is from 0 to 1. Since it is negatively correlated with the aperture size of the double-layer filter 112, a negative correlation mapping is performed by subtracting the value from the real number 1. It is the maximum value of the adjustable aperture size of the double-layer filter 112.

[0042] At this point, the cleaning frequency and stirring speed at each sampling moment are obtained in each waste liquid treatment process. Correspondingly, the 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.

[0043] The present application also provides a chemical waste liquid treatment process, comprising the following steps: Obtain the concentration data of each heavy metal in the pre-treated 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 pre-treated chemical waste liquid, it is judged whether the pre-treated chemical waste liquid meets the discharge requirements. When the pre-treated chemical waste liquid does not meet the discharge requirements, the pre-treated chemical waste liquid is drawn back to the treatment tank and the pre-treated chemical waste liquid is repeatedly treated with waste liquid, and the waste liquid after the treatment is repeatedly input into the chemical waste liquid temporary storage box through the outlet pipe A until the pre-treated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pre-treated chemical waste liquid is discharged; The waste liquid treatment process is as follows: determining the stirring speed at each sampling moment in each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the liquid circulation degree relative to the whole; and performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process.

[0044] Since the data processing process of a chemical waste liquid treatment process has been described in detail in the above-mentioned embodiment of a chemical waste liquid treatment equipment, it will not be further repeated.

[0045] To summarize, the present application first determines the emission requirements with the help of the overall size of the heavy metal concentration data monitored by the heavy metal detector; when the emission requirements are not met, the pretreated chemical waste liquid is pumped back to 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 turbidity and the degree of liquid circulation relative to the overall size, thereby adaptively treating the pretreated chemical waste liquid, solving the problem that when the chemical waste liquid is merged with the coagulant liquid and a large amount of solid impurities appear, it may cause greater pressure on the cleaning scraper and cause blockage of the sewage pipe, and it is impossible to accurately judge whether the treated waste liquid meets the emission standards, so that the effect of chemical waste liquid treatment is better.

[0046] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying 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.

[0047] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A chemical waste liquid treatment equipment, characterized in that: It includes an inlet pipe, a treatment tank, an outlet pipe A, a chemical waste liquid temporary storage box, a data sensor group, a heavy metal detector, and a control module; the treatment tank is connected to the chemical waste liquid temporary storage box through the outlet pipe A; the chemical waste liquid to be treated enters the treatment tank through the inlet pipe, and after being pre-treated in the treatment tank, the pre-treated chemical waste liquid is input into the chemical waste liquid temporary storage box through the outlet pipe A; the heavy metal detector is located in the chemical waste liquid temporary storage box, the data sensor group is installed in the treatment tank, and the data sensor group includes a turbidity sensor, a flow sensor and a flow velocity sensor; the heavy metal detector is used The flow sensor group is used to detect the concentration data of each heavy metal, and 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, and the flow rate sensor group is used to detect the flow rate 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 pre-treated chemical waste liquid in the treatment tank; the heavy metal detector, flow sensor, flow rate sensor and turbidity sensor are all connected to the control module by signal; the control module is used to obtain the concentration data of each heavy metal in the pre-treated chemical waste liquid before each waste liquid treatment process, as well as the liquid circulation degree and turbidity at each sampling time during the waste liquid treatment process; According to the concentration data of each heavy metal in the pre-treated chemical waste liquid, it is judged whether the pre-treated chemical waste liquid meets the discharge requirements. When the pre-treated chemical waste liquid does not meet the discharge requirements, the pre-treated chemical waste liquid is drawn back to the treatment tank and the pre-treated chemical waste liquid is repeatedly treated with waste liquid, and the waste liquid after the treatment is repeatedly input into the chemical waste liquid temporary storage box through the outlet pipe A until the pre-treated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pre-treated chemical waste liquid is discharged; The waste liquid treatment process is as follows: determining the stirring speed at each sampling moment in each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the liquid circulation degree relative to the whole; and performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process.

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

3. A chemical waste liquid treatment equipment according to claim 2, characterized in that: The process of obtaining the heavy metal concentration reference value includes: The normalized value of the accumulated values ​​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 equipment according to claim 1, characterized in that: 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 of the speed adjustment range; 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 rotation speed range is used as the rotation speed adjustment value at each sampling moment; The sum of the minimum speed value and the speed adjustment value is used as the stirring speed at each sampling time in each waste liquid treatment process.

5. The chemical waste liquid treatment equipment according to claim 1, characterized in that: The process of obtaining the degree of liquid circulation includes: The product of the flow velocity and flow rate of the liquid on the filter surface at each sampling moment is taken as the corresponding liquid circulation velocity.

6. The chemical waste liquid treatment equipment according to claim 1, characterized in that: The acquisition process of the cleaning frequency includes: For any waste liquid treatment: Each sampling moment in the process of waste liquid treatment is taken as the target moment, and all moments before the target moment are taken as the corresponding reference moments; The average of the liquid circulation velocities corresponding to all reference moments is used as the reference circulation velocity; and the instantaneous contrast value of the liquid circulation at the target moment is determined according to the difference between the reference circulation velocity and the liquid circulation velocity at the target moment; Determine the sedimentation rate reference value at the target time based on the overall turbidity change at all reference times and the instantaneous turbidity change at the target time; Determining a frequency increase weight at a target time according to the deposition rate reference value and the liquid circulation instantaneous comparison value; the deposition rate reference value and the liquid circulation instantaneous comparison value are both positively correlated with the frequency increase weight; The cleaning frequency at the target time is determined according to the frequency increase weight combined with a preset standard cleaning frequency.

7. A chemical waste liquid treatment equipment according to claim 6, characterized in that: The process of obtaining the deposition rate reference value includes: The difference between the turbidity at each sampling moment and the turbidity at the previous sampling moment is taken as the turbidity change value at each sampling moment; The average of the turbidity change values ​​at all reference times corresponding to the target time is taken as the reference change value; The sum of 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.

8. The chemical waste liquid treatment equipment according to claim 6, characterized in that: The process of obtaining the frequency increase weight includes: The frequency increase weight at the target time is determined according to a normalized value of the product between the deposition rate reference value and the liquid circulation instantaneous contrast value.

9. The chemical waste liquid treatment equipment according to claim 6, characterized in that: The step of determining the cleaning frequency at the target time according to the frequency increase weight combined with the preset standard cleaning frequency includes: 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 of the cleaning frequency increase value and the preset standard cleaning frequency.

10. A chemical waste liquid treatment process, characterized in that: The following steps are involved: Obtain the concentration data of each heavy metal in the pre-treated 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 pre-treated chemical waste liquid, it is judged whether the pre-treated chemical waste liquid meets the discharge requirements. When the pre-treated chemical waste liquid does not meet the discharge requirements, the pre-treated chemical waste liquid is drawn back to the treatment tank and the pre-treated chemical waste liquid is repeatedly treated with waste liquid, and the waste liquid after the treatment is repeatedly input into the chemical waste liquid temporary storage box through the outlet pipe A until the pre-treated chemical waste liquid after the waste liquid treatment meets the discharge requirements and the pre-treated chemical waste liquid is discharged; The waste liquid treatment process is as follows: determining the stirring speed at each sampling moment in each waste liquid treatment according to the turbidity of the pretreated chemical waste liquid at each sampling moment in each waste liquid treatment; in the process of stirring the pretreated chemical waste liquid at the stirring speed, determining the cleaning frequency at each sampling moment in each waste liquid treatment according to the instantaneous change of turbidity at each sampling moment and the liquid circulation degree relative to the whole; and performing waste liquid treatment according to all stirring speeds and all cleaning frequencies in each waste liquid treatment process.

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