CN114308852A - Method and device for controlling active carbon pickling based on solution pH value and conductivity - Google Patents

Method and device for controlling active carbon pickling based on solution pH value and conductivity Download PDF

Info

Publication number
CN114308852A
CN114308852A CN202111588810.XA CN202111588810A CN114308852A CN 114308852 A CN114308852 A CN 114308852A CN 202111588810 A CN202111588810 A CN 202111588810A CN 114308852 A CN114308852 A CN 114308852A
Authority
CN
China
Prior art keywords
pickling
solution
value
conductivity
kettle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111588810.XA
Other languages
Chinese (zh)
Inventor
聂欣
王勤
吕明
祝红梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Qizheng Environmental Protection Technology Co ltd
Original Assignee
Zhejiang Qizheng Environmental Protection Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Qizheng Environmental Protection Technology Co ltd filed Critical Zhejiang Qizheng Environmental Protection Technology Co ltd
Priority to CN202111588810.XA priority Critical patent/CN114308852A/en
Publication of CN114308852A publication Critical patent/CN114308852A/en
Priority to CN202210633655.7A priority patent/CN114939570A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a method and a device for controlling active carbon pickling based on the pH value and the conductivity of a solution, which are characterized in that the pH values and the conductivities of pickling solutions at different positions in a pickling kettle are monitored in real time through a plurality of pH value measuring probes and a plurality of solution conductivity measuring probes, the pH values and the conductivities at different positions in the pickling kettle are analyzed through a feedback controller, and the stirring uniformity of the pickling solution in the pickling kettle is judged; and feeding back and adjusting the acid adding amount according to the average value of the pH values of the acid washing solutions at different positions, and judging whether the acid washing of the activated carbon reaches the standard according to the stability of the average value of the conductivity of the acid washing solutions at different positions within a period of time. The method establishes a calculation formula of the adding amount of the pickling solution, and adopts conservative correction to ensure that the new adding amount is as close as possible to the required amount and the condition of excessive adding amount of the pickling solution is not easy to occur; the method has the advantages of rapidness and accuracy, improves the efficiency of the acid washing treatment of the activated carbon, and reduces the waste of resources.

Description

Method and device for controlling active carbon pickling based on solution pH value and conductivity
Technical Field
The invention belongs to the technical field of activated carbon regeneration, and particularly relates to a method and a device for controlling activated carbon pickling based on a solution pH value and conductivity.
Background
In the field of activated carbon regeneration, in order to reduce heavy metal salts contained in the original activated carbon, remove redundant ash and adjust the pH value, the prior art adds an acid pickling link in the preparation and regeneration processes of the activated carbon, namely, the activated carbon is subjected to acid pickling treatment. The initial activated carbon pickling process in China generally comprises the steps of soaking activated carbon to be treated in a special pickling container by using a nitric acid solution or a hydrochloric acid solution with the total solution volume of about 6%, stirring periodically by manpower, and then adding clear water from a side water outlet for rinsing after stirring to ensure the adsorption activity of the activated carbon; however, because of the limitation of manual stirring, the ash powder and the pickling solution are difficult to be fully contacted and mixed in the pickling process, and the pickling reaction is insufficient, so that the regeneration treatment of the activated carbon does not reach the standard; however, the real-time monitoring cannot be realized in the pickling process, so that a large amount of resources are still invested under the condition that the pickling process of the activated carbon is completed, waste and low treatment efficiency are caused, and flexible feedback control on the investment amount and the stirring time of the pickling solution in the acid process cannot be realized.
At present, the evaluation index of the regeneration pickling process of the activated carbon mainly takes the pH value of a pickling solution as a main index, but in practice, the activated carbon can adsorb a large amount of impurities containing soluble ions, such as various heavy metal salts, and the impurities can enter the pickling solution in the boiling and stirring processes of high-temperature steam in a pickling device to cause the change of the conductivity of the pickling solution, so that the conductivity of the solution is also an important index for measuring the soluble impurities contained in a pickling carbon sample.
In order to solve the problems, an acid pickling process and automatic equipment capable of realizing real-time monitoring and feedback of an activated carbon regeneration acid pickling process are urgently needed at present so as to improve the efficiency of activated carbon regeneration acid pickling.
Disclosure of Invention
Based on the defects of the prior art, the invention discloses the method and the device for controlling the activated carbon pickling based on the pH value and the conductivity of the solution, can detect the pickling state of the activated carbon by means of the pH value and the conductivity of the pickling solution, can perform automatic feedback control on the evaluation index condition and the treatment flow in the pickling process of the activated carbon, improves the treatment efficiency, reduces the treatment cost and optimizes the treatment effect.
The technical scheme of the invention is as follows:
the invention discloses a method for controlling active carbon pickling based on the pH value and the conductivity of a solution, which comprises the following steps:
the method comprises the following steps: pouring the activated carbon to be subjected to acid washing treatment into an acid washing kettle, detecting the stacking height h of the activated carbon by a photoelectric sensor arranged in the acid washing kettle, and transmitting the stacking height h to a feedback controller; then adding a preset amount of pickling solution into the pickling kettle;
step two: the lifting mechanism drives the measuring probe bracket to descend, so that a plurality of pH value measuring probes and a plurality of solution conductivity measuring probes carried by the measuring probe bracket descend and are inserted into the pickling solution; then covering the upper part of the pickling kettle with an electric hydraulic pickling kettle cover; the steam generator starts to introduce steam into the pickling kettle from the bottom of the pickling kettle, and simultaneously starts the stirring mechanism; under the combined action of the water vapor and the stirring mechanism, soluble ions in the activated carbon enter the pickling solution;
step three: the pH value and the conductivity of the pickling solution at different positions in the pickling kettle are monitored in real time by the multiple pH value measuring probes and the multiple solution conductivity measuring probes, the measured data are fed back to the pH value detector and the solution conductivity detector and then transmitted to the data processor by the pH value detector and the solution conductivity detector, and the data processor respectively calculates the average value of the pH values of the solutions at all the positions in the pickling kettle
Figure BDA0003428463090000021
And variance
Figure BDA0003428463090000022
Average value of solution conductivity
Figure BDA0003428463090000023
And variance
Figure BDA0003428463090000024
And transmitting the calculation result to a feedback controller;
step four: the stirring mechanism continuously stirs, when the feedback controller judges the variance of the pH value of the solution in the third step
Figure BDA0003428463090000025
Less than a predetermined value
Figure BDA0003428463090000026
And the variance of the conductivity of the solution
Figure BDA0003428463090000027
Is also less than the preset value
Figure BDA0003428463090000028
Then, entering the step five;
step five: the feedback controller judges the average value of the pH value of the solution
Figure BDA0003428463090000029
Whether the difference value with the standard PH constant E is smaller than a preset value A or not is judged, if so, the seventh step is carried out, and if not, the sixth step is carried out;
step six: the feedback controller controls the peristaltic pump to start, the peristaltic pump continuously adds pickling solution in a pickling solution tank into the pickling kettle through the acid injection channel, and the adding volume V of the pickling solution is calculated as follows:
establishing the adding amount C of the pickling solution, the stacking cross-sectional area S of the activated carbon and the average value of the pH value of the solution
Figure BDA00034284630900000212
The difference value delta P between the value and the E and the stacking height h of the activated carbon in the pickling kettle are in a relational expression:
Figure BDA00034284630900000210
Figure BDA00034284630900000211
the addition volume V of the pickling solution, the concentration alpha of the pickling solution and the addition amount C of the pickling solution satisfy a formula (3), and the formula (3) is as follows:
V＝αC (3)
adding pickling solution with the volume V into the pickling kettle and returning to the fourth step;
step seven: the conductivity of the pickling solution is detected once by each solution conductivity measuring probe in the pickling kettle at preset time intervals, and the average value of the solution conductivity at each position in the pickling kettle at each moment is calculated by the data processor
Figure BDA0003428463090000031
And is transmitted to a feedback controller, and the feedback controller is used for averaging the conductivity of the solution in the pickling kettle at each moment
Figure BDA0003428463090000032
Making a comparison, if the maximum value of the average values of the conductivities of the solutions is
Figure BDA0003428463090000033
And minimum value
Figure BDA0003428463090000034
If the difference value is greater than the preset value delta, executing the step eight, otherwise executing the step nine;
step eight: continuously introducing water vapor into the pickling kettle and continuously stirring, and returning to the seventh step after preset time;
step nine: stopping the stirring mechanism from operating, and stopping introducing water vapor into the pickling kettle; then, opening the electric hydraulic pickling kettle cover, and driving the measuring probe bracket to ascend by the lifting mechanism; and then, opening a carbon outlet at the bottom of the pickling kettle, and spraying and cleaning the inner wall of the pickling kettle and the stirring mechanism to enable the carbon subjected to pickling to enter the storage container.
Preferably, said preset value
Figure BDA0003428463090000035
The value range is 0.01-0.02, and the preset value AThe value range is 0.5-0.1.
Preferably, the average value of the conductivity of the solution in the pickling kettle in the third step
Figure BDA0003428463090000036
The preset value in the fourth step is 50-100 mu S/cm
Figure BDA0003428463090000037
The value range is 3 to 5 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA0003428463090000038
At a preset value of 100-150 mu S/cm
Figure BDA0003428463090000039
The value range is 5 to 8 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA00034284630900000310
At a preset value of 150-200 mu S/cm
Figure BDA00034284630900000311
The value is 8 to 10 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA00034284630900000312
When the value is more than 200 mu S/cm, the preset value
Figure BDA00034284630900000313
The value is 10 to 15 (mu S/cm)2。
Preferably, the value range of the preset value delta in the seventh step is 2-5 mu S/cm.
The invention discloses a device for controlling activated carbon pickling based on the pH value and the conductivity of a solution, which comprises a pickling kettle, a pH value detector, a measuring probe bracket, a pH value measuring probe, a solution conductivity measuring probe, a stirring mechanism, a solution conductivity detector, a data processor, a feedback controller and a steam generator, wherein the pH value detector is arranged on the pickling kettle; the electric hydraulic pickling kettle cover is assembled at the top of the pickling kettle and is driven to lift by hydraulic pressure; the stirring mechanism is arranged in the pickling kettle; the central shaft of the stirring mechanism and the bottom surface of the pickling kettle form a revolute pair and are fixedly connected with an output shaft of a stirring motor; the photoelectric sensor is fixed in the pickling kettle; the measuring probe bracket is driven to lift by a lifting mechanism; a plurality of PH value measuring probes and a plurality of solution conductivity measuring probes are fixed on the measuring probe bracket; the gas outlet of the steam generator is communicated with the gas inlet at the bottom of the pickling kettle; the stirring motor, the lifting mechanism and the steam generator are all controlled by a feedback controller; the output end of each PH value measuring probe is electrically connected with the input end of the PH value detector; the output end of each solution conductivity measuring probe is electrically connected with the input end of the solution conductivity detector; the output end of the PH value detector and the output end of the solution conductivity detector are both electrically connected with the input end of the data processor; and the output end of the data processor and the output end of the photoelectric sensor are electrically connected with the feedback controller.
Preferably, a plurality of acid injection channels are formed in the inner wall surface of the pickling kettle, a liquid inlet of each acid injection channel is communicated with a liquid outlet of the peristaltic pump, and a liquid inlet of the peristaltic pump is communicated with the pickling liquid pool; the pickling solution peristaltic pump is electrically connected with the feedback controller.
Preferably, a steam cavity is fixed at the bottom of the pickling kettle, and an air inlet of the steam cavity is communicated with an air outlet of the steam generator through an air inlet at the bottom of the pickling kettle; the steam cavity is provided with a plurality of steam nozzles, and check valves are arranged at the steam nozzles; the check valve is electrically connected with the feedback controller.
Preferably, the measuring probe support is provided with a disc, each pH value measuring probe is uniformly distributed on the disc of the measuring probe support in the circumferential direction, and each solution conductivity measuring probe is uniformly distributed on the disc of the measuring probe support in the circumferential direction.
The invention has the beneficial effects that:
1. the method comprises the steps of monitoring the pH values and the conductivities of the pickling solutions at different positions in the pickling kettle in real time through a plurality of pH value measuring probes and a plurality of solution conductivity measuring probes, feeding the measured data back to a pH value detector and a solution conductivity detector, transmitting the data to a feedback controller through a data processor, analyzing the pH values and the conductivities at different positions in the pickling kettle through the feedback controller, and judging the stirring uniformity of the pickling solutions in the pickling kettle; feeding back and adjusting the acid adding amount according to the average value of the pH values of the acid washing solutions at different positions, and judging whether the acid washing of the activated carbon reaches the standard or not according to the stability of the average value of the conductivity of the acid washing solutions at different positions within a period of time; the invention can realize real-time monitoring, has the advantages of rapidness and accuracy, improves the efficiency of the acid washing treatment of the activated carbon and reduces the waste of resources.
2. The invention considers the influence of the accumulation height of the activated carbon in the pickling kettle and the accumulation cross-sectional area of the activated carbon on the pH value of the solution, establishes a calculation formula of the addition amount of the pickling solution, adopts conservative correction to ensure that the new addition amount is as close as possible to the required amount, and is not easy to cause the condition of excessive addition of the pickling solution, solves the problem of insufficient pickling or excessive pickling caused by improper addition amount in the prior art, improves the pickling efficiency, reduces the treatment cost and improves the profit while ensuring the pickling effect.
3. The method takes the conductivity of the solution as an evaluation index of the regeneration and acid washing process of the activated carbon, and adopts the pH value of the solution and the conductivity of the solution as double indexes, so that the acid washing treatment result of the activated carbon has higher accuracy.
Drawings
FIG. 1 is a schematic structural diagram of a carbon pickling apparatus according to the present invention;
fig. 2 is a flow chart of the feedback control of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention discloses a method for controlling active carbon pickling based on the pH value and the conductivity of a solution, which comprises the following steps:
the method comprises the following steps: pouring the activated carbon to be subjected to acid washing treatment into an acid washing kettle, detecting the stacking height h of the activated carbon by a photoelectric sensor arranged in the acid washing kettle, and transmitting the stacking height h to a feedback controller 11; then, adding a preset amount of pickling solution (concentrated hydrochloric acid diluent is adopted in the embodiment) into the pickling kettle;
step two: the lifting mechanism drives the measuring probe bracket 3 to descend, so that a plurality of pH value measuring probes 4 and a plurality of solution conductivity measuring probes 5 carried by the measuring probe bracket descend and are inserted into the pickling solution; then covering the upper part of the pickling kettle with an electric hydraulic pickling kettle cover 1 to ensure the sealing property in the kettle; the steam generator 13 starts to introduce steam into the pickling kettle from the bottom of the pickling kettle, and simultaneously starts the stirring mechanism; under the combined action of the water vapor and the stirring mechanism, soluble ions in the activated carbon enter the pickling solution;
step three: the multiple PH value measuring probes 4 and the multiple solution conductivity measuring probes 5 monitor the PH values and conductivities of the pickling solutions at different positions in the pickling kettle in real time, the measured data are fed back to the PH value detector 2 and the solution conductivity detector 7 and then transmitted to the data processor 10 through the PH value detector 2 and the solution conductivity detector 7, and the data processor 10 respectively calculates the average value of the PH values of the solutions at all the positions in the pickling kettle
Figure BDA0003428463090000051
And variance
Figure BDA0003428463090000052
Average value of solution conductivity
Figure BDA0003428463090000053
And variance
Figure BDA0003428463090000054
And transmits the calculation result to the feedback controller 11;
step four: the stirring mechanism 6 continuously stirs, when the feedback controller judges the variance of the PH value of the solution in the third step
Figure BDA0003428463090000055
Less than a predetermined value
Figure BDA0003428463090000056
And the variance of the conductivity of the solution
Figure BDA0003428463090000057
Is also less than the preset value
Figure BDA0003428463090000058
If the stirring uniformity of the pickling solution in the pickling kettle meets the requirement, namely the formula (1) and the formula (2), entering the step five; equations (1) and (2) are as follows:
Figure BDA0003428463090000059
Figure BDA00034284630900000510
step five: the feedback controller judges the average value of the pH value of the solution
Figure BDA00034284630900000511
Whether the difference value with the standard PH constant E is smaller than a preset value A or not; if the solution has an average pH value
Figure BDA00034284630900000512
If the difference value with the standard PH constant E is smaller than the preset value A, the acid washing neutralization degree is shown to meet the PH value requirement, namely the formula (3) is met, and the seventh step is carried out; otherwise, entering the step six; equation (3) is as follows:
Figure BDA00034284630900000513
step six: the feedback controller 11 controls the peristaltic pump 9 to start, the peristaltic pump 9 continuously adds the pickling solution in the pickling solution tank into the pickling kettle through the acid injection channel 8, and the adding volume V of the pickling solution is calculated as follows:
establishing the adding amount C of the pickling solution, the stacking cross-sectional area S of the activated carbon and the average value of the pH value of the solution
Figure BDA0003428463090000061
The difference value delta P between the value and the E and the stacking height h of the activated carbon in the pickling kettle are in a relational expression:
Figure BDA0003428463090000062
Figure BDA0003428463090000063
the establishment mechanism of the formula (4) is analyzed as follows: considering the stacking condition of the activated carbon in the pickling kettle, the ratio of the stacking height h to the stacking cross-sectional area S in the formula (4) influences the adding dosage C of the pickling solution, namely the stacking density of the activated carbon influences the pH value detected by the pH value measuring probe; the larger the stacking density of the activated carbon in the kettle is, the smaller the volume of the solution existing in the particle gaps is, so that the concentration of hydrogen ions in the solution between adjacent carbon particles is possibly larger, the PH value of the measurement position of the PH value measurement probe is lower than the actual PH value of the solution, and if the pickling solution addition amount compensation is directly carried out according to the difference between the measurement value of the PH value measurement probe and the PH value required by pickling, the pickling solution addition amount is larger; therefore, numerical value conservative correction needs to be carried out on the adding dosage of the pickling solution, and the correction mode is shown as a formula (4); the corrected adding dosage C of the pickling solution not only relates to the influence factors such as the stacking height h and the stacking section area S, but also realizes that the adding dosage is as close as possible to the required dosage and the condition of excessive adding is not easy to occur; not only ensures the pickling effect, but also improves the pickling efficiency.
The reference value of the adding amount C of the pickling solution in the formula (4) is influenced by the cross sectional area S of the pickling kettle and the stacking height h of the activated carbon and is also related to the particle size of the activated carbon; the influence of other factors except the above factors on the dosage C is small and can be ignored; if the carbon particles are simplified into standard spheres, the smaller the particle size of the activated carbon is, the smaller the volume of the activated carbon is, and the larger the ratio of the surface area to the volume of the activated carbon is, the larger the relative contact area between the activated carbon and the pickling solution is, the more sufficient the contact reaction between the activated carbon and the pickling solution is, and the higher the change speed of the pH value of the solution is, so that the influence on the adding amount of the pickling solution is generated; however, the diameter of the activated carbon used in industry is generally between 2mm and 4mm, and belongs to large-particle-size particles, and the stirring speed of the stirring mechanism is low, so that the influence of the particle size of the activated carbon on the reference value of the dosage C is not large; considering the treatment efficiency, if the particle size factor of the activated carbon is considered and the conservative correction of the dosage value is not increased, the risk of excessive adding of the pickling solution exists; therefore, the whole circulation frequency can be increased to 13-15 times from the original 10 times; considering from the aspect of calculation processing efficiency of the controller, if the influence of the particle size of the activated carbon on the reference value of the dosage C is considered, numerous variables are involved, so that the complexity of the variable coupling relation is increased, and the calculation accuracy of the controller is influenced; as can be seen from the above, the influence of the particle size of the activated carbon on the dosage C of the added pickling solution can be ignored. In the actual treatment, the final treatment result of the formula (4) not only ensures no excess, but also ensures that the acid washing solution has less feedback addition cycle times and high feedback regulation efficiency, and can well meet the requirement of PH value index of activated carbon regeneration.
The addition volume V of the pickling solution, the concentration alpha of the pickling solution and the addition amount C of the pickling solution satisfy the formula (6), and the formula (6) is as follows:
V＝αC (6)
adding pickling solution with the volume V into the pickling kettle and returning to the fourth step;
step seven: the conductivity measuring probes 5 of each solution in the pickling kettle detect the conductivity of the pickling solution once at preset time intervals, and the data processor 10 calculates the average value of the conductivity of the solution at each position in the pickling kettle at each moment
Figure BDA0003428463090000071
And is transmitted to a feedback controller, and the feedback controller is used for averaging the conductivity of the solution in the pickling kettle at each moment
Figure BDA0003428463090000072
Making a comparison, if the maximum value of the average values of the conductivities of the solutions is
Figure BDA0003428463090000073
And minimum value
Figure BDA0003428463090000074
If the difference value is larger than the preset value delta, executing the step eight, otherwise, considering that the charged soluble ion impurities contained in the activated carbon in the pickling kettle are fully washed out when the formula (7) is met, and executing the step nine when the pickling treatment of the activated carbon reaches the standard; equation (7) is as follows:
Figure BDA0003428463090000075
step eight: continuously introducing water vapor into the pickling kettle and continuously stirring, and returning to the seventh step after preset time;
step nine: the stirring mechanism 6 stops running and stops introducing water vapor into the pickling kettle; then, opening the electric hydraulic pickling kettle cover 1, and driving the measuring probe bracket 3 to ascend by the lifting mechanism; and then, opening a carbon outlet at the bottom of the pickling kettle, and spraying and cleaning the inner wall of the pickling kettle and the stirring mechanism to enable the pickled carbon to enter a storage container (the bottom of the storage container is provided with a filter screen, and the pickling waste liquid can flow out separately).
As a preferred embodiment, the preset value
Figure BDA0003428463090000076
The value range is 0.01-0.02, and the value range of the preset value A is 0.5-0.1.
As a preferred embodiment, the average value of the conductivity of the solution in the pickling kettle in the third step
Figure BDA0003428463090000077
The preset value in the fourth step is 50-100 mu S/cm
Figure BDA0003428463090000078
The value range is 3 to 5 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA0003428463090000079
At a preset value of 100-150 mu S/cm
Figure BDA00034284630900000710
The value range is 5 to 8 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA00034284630900000711
At a preset value of 150-200 mu S/cm
Figure BDA00034284630900000712
The value is 8 to 10 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure BDA00034284630900000713
When the value is more than 200 mu S/cm, the preset value
Figure BDA00034284630900000714
The value is 10 to 15 (mu S/cm)2(ii) a Preset value
Figure BDA00034284630900000715
Specifically, the selection is carried out according to the carbon treatment amount, and the larger the treatment amount is, the larger the selection value is.
As a preferred embodiment, the value range of the preset value delta in the seventh step is 2-5 muS/cm; the preset value delta is specifically selected according to the carbon treatment amount, and the larger the treatment amount is, the larger the selected value is.
As shown in fig. 1 and 2, the device for controlling activated carbon pickling based on solution PH and conductivity of the invention comprises a pickling kettle, a PH detector 2, a measuring probe bracket 3, a PH measuring probe 4, a solution conductivity measuring probe 5, a stirring mechanism 6, a solution conductivity detector 7, a data processor 10, a feedback controller 11 and a steam generator 13; the electric hydraulic pickling kettle cover 1 is assembled at the top of the pickling kettle and is driven to lift by hydraulic pressure; the stirring mechanism 6 is arranged in the pickling kettle; a central shaft of the stirring mechanism 6 and the bottom surface of the pickling kettle form a revolute pair and are fixedly connected with an output shaft of a stirring motor 14; the photoelectric sensor is fixed in the pickling kettle; the measuring probe bracket 3 is driven by a lifting mechanism to lift; a plurality of PH value measuring probes 4 and a plurality of solution conductivity measuring probes 5 are fixed on the measuring probe bracket 3; the gas outlet of the steam generator 13 is communicated with the gas inlet at the bottom of the pickling kettle; the stirring motor 14, the lifting mechanism and the steam generator 13 are all controlled by a feedback controller 11; the output end of each PH value measuring probe 4 is electrically connected with the input end of the PH value detector 2; the output end of each solution conductivity measuring probe 5 is electrically connected with the input end of the solution conductivity detector 7; the output end of the PH value detector 2 and the output end of the solution conductivity detector 7 are both electrically connected with the input end of the data processor 10; the output of the data processor 10 and the output of the photo-sensor are both electrically connected to a feedback controller 11.
As a preferred embodiment, a plurality of acid injection channels 8 are arranged on the inner wall surface of the pickling kettle, a liquid inlet of each acid injection channel 8 is communicated with a liquid outlet of a peristaltic pump 9, and a liquid inlet of the peristaltic pump 9 is communicated with a pickling solution pool; the pickling solution peristaltic pump 9 is electrically connected with the feedback controller 11, and can realize quantitative conveying of the pickling solution.
As a preferred embodiment, a steam cavity 12 is fixed at the bottom of the pickling kettle, and the air inlet of the steam cavity 12 is communicated with the air outlet of the steam generator 13 through the air inlet at the bottom of the pickling kettle; a plurality of steam nozzles are arranged on the steam cavity 12, and check valves are arranged at the steam nozzles to prevent the pickling solution in the pickling kettle from flowing back into the steam cavity 12; the check valve is electrically connected with the feedback controller.
As a preferred embodiment, the measuring probe holder 3 is provided with disks, the pH measuring probes 4 are circumferentially and uniformly distributed on the disks of the measuring probe holder 3, and the solution conductivity measuring probes 5 are circumferentially and uniformly distributed on the disks of the measuring probe holder 3.

Claims (8)

1. The method for controlling the acid washing of the activated carbon based on the pH value and the conductivity of the solution is characterized in that: the method comprises the following specific steps:
the method comprises the following steps: pouring the activated carbon to be subjected to acid washing treatment into an acid washing kettle, detecting the stacking height h of the activated carbon by a photoelectric sensor arranged in the acid washing kettle, and transmitting the stacking height h to a feedback controller; then adding a preset amount of pickling solution into the pickling kettle;
step two: the lifting mechanism drives the measuring probe bracket to descend, so that a plurality of pH value measuring probes and a plurality of solution conductivity measuring probes carried by the measuring probe bracket descend and are inserted into the pickling solution; then covering the upper part of the pickling kettle with an electric hydraulic pickling kettle cover; the steam generator starts to introduce steam into the pickling kettle from the bottom of the pickling kettle, and simultaneously starts the stirring mechanism; under the combined action of the water vapor and the stirring mechanism, soluble ions in the activated carbon enter the pickling solution;
step three: the pH value and the conductivity of the pickling solution at different positions in the pickling kettle are monitored in real time by the multiple pH value measuring probes and the multiple solution conductivity measuring probes, the measured data are fed back to the pH value detector and the solution conductivity detector and then transmitted to the data processor by the pH value detector and the solution conductivity detector, and the data processor respectively calculates the average value of the pH values of the solutions at all the positions in the pickling kettle
Figure FDA0003428463080000011
And variance
Figure FDA0003428463080000012
Average value of solution conductivity
Figure FDA0003428463080000013
And variance
Figure FDA0003428463080000014
And transmitting the calculation result to a feedback controller;
step four: the stirring mechanism continuously stirs, when the feedback controller judges the variance of the pH value of the solution in the third step
Figure FDA0003428463080000015
Less than a predetermined value
Figure FDA0003428463080000016
And the variance of the conductivity of the solution
Figure FDA0003428463080000017
Is also less than the preset value
Figure FDA0003428463080000018
Then, entering the step five;
step five: the feedback controller judges the average value of the pH value of the solution
Figure FDA0003428463080000019
Whether the difference value with the standard PH constant E is smaller than a preset value A or not is judged, if so, the seventh step is carried out, and if not, the sixth step is carried out;
step six: the feedback controller controls the peristaltic pump to start, the peristaltic pump continuously adds pickling solution in a pickling solution tank into the pickling kettle through the acid injection channel, and the adding volume V of the pickling solution is calculated as follows:
establishing the adding amount C of the pickling solution, the stacking cross-sectional area S of the activated carbon and the average value of the pH value of the solution
Figure FDA00034284630800000110
The difference value delta P between the value and the E and the stacking height h of the activated carbon in the pickling kettle are in a relational expression:
Figure FDA00034284630800000111
Figure FDA00034284630800000112
the addition volume V of the pickling solution, the concentration alpha of the pickling solution and the addition amount C of the pickling solution satisfy a formula (3), and the formula (3) is as follows:
V＝αC (3)
adding pickling solution with the volume V into the pickling kettle and returning to the fourth step;
step seven: the conductivity of the pickling solution is detected once by each solution conductivity measuring probe in the pickling kettle at preset time intervals, and the average value of the solution conductivity at each position in the pickling kettle at each moment is calculated by the data processor
Figure FDA0003428463080000021
And is transmitted to a feedback controller, and the feedback controller is used for averaging the conductivity of the solution in the pickling kettle at each moment
Figure FDA0003428463080000022
Making a comparison, if the maximum value of the average values of the conductivities of the solutions is
Figure FDA0003428463080000023
And minimum value
Figure FDA0003428463080000024
If the difference value is greater than the preset value delta, executing the step eight, otherwise executing the step nine;
step eight: continuously introducing water vapor into the pickling kettle and continuously stirring, and returning to the seventh step after preset time;
step nine: stopping the stirring mechanism from operating, and stopping introducing water vapor into the pickling kettle; then, opening the electric hydraulic pickling kettle cover, and driving the measuring probe bracket to ascend by the lifting mechanism; and then, opening a carbon outlet at the bottom of the pickling kettle, and spraying and cleaning the inner wall of the pickling kettle and the stirring mechanism to enable the carbon subjected to pickling to enter the storage container.
2. The method for controlled pickling of activated carbon based on solution PH and conductivity as claimed in claim 1 wherein: said preset value
Figure FDA0003428463080000025
The value range is 0.01-0.02, and the value range of the preset value A is 0.5-0.1.
3. The method for controlled pickling of activated carbon based on solution PH and conductivity as claimed in claim 1 wherein: average value of conductivity of solution in pickling kettle in step three
Figure FDA0003428463080000026
The preset value in the fourth step is 50-100 mu S/cm
Figure FDA0003428463080000027
The value range is 3 to 5 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure FDA0003428463080000028
At a preset value of 100-150 mu S/cm
Figure FDA0003428463080000029
The value range is 5 to 8 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure FDA00034284630800000210
At a preset value of 150-200 mu S/cm
Figure FDA00034284630800000211
The value is 8 to 10 (mu S/cm)2(ii) a When the average value of the conductivity of the solution in the pickling kettle
Figure FDA00034284630800000212
When the value is more than 200 mu S/cm, the preset value
Figure FDA00034284630800000213
The value is 10 to 15 (mu S/cm)2。
4. The method for controlled pickling of activated carbon based on solution PH and conductivity as claimed in claim 1 wherein: and the value range of the preset value delta in the seventh step is 2-5 mu S/cm.
5. Device based on solution pH value and conductivity control active carbon pickling, including pickling cauldron, measuring probe support, rabbling mechanism and steam generator, its characterized in that: the device also comprises a PH value detector, a PH value measuring probe, a solution conductivity detector, a data processor and a feedback controller; the electric hydraulic pickling kettle cover is assembled at the top of the pickling kettle and is driven to lift by hydraulic pressure; the stirring mechanism is arranged in the pickling kettle; the central shaft of the stirring mechanism and the bottom surface of the pickling kettle form a revolute pair and are fixedly connected with an output shaft of a stirring motor; the photoelectric sensor is fixed in the pickling kettle; the measuring probe bracket is driven to lift by a lifting mechanism; a plurality of PH value measuring probes and a plurality of solution conductivity measuring probes are fixed on the measuring probe bracket; the gas outlet of the steam generator is communicated with the gas inlet at the bottom of the pickling kettle; the stirring motor, the lifting mechanism and the steam generator are all controlled by a feedback controller; the output end of each PH value measuring probe is electrically connected with the input end of the PH value detector; the output end of each solution conductivity measuring probe is electrically connected with the input end of the solution conductivity detector; the output end of the PH value detector and the output end of the solution conductivity detector are both electrically connected with the input end of the data processor; and the output end of the data processor and the output end of the photoelectric sensor are electrically connected with the feedback controller.
6. An apparatus for controlled pickling of activated carbon based on solution PH and conductivity as in claim 5 wherein: a plurality of acid injection channels are formed in the inner wall surface of the pickling kettle, a liquid inlet of each acid injection channel is communicated with a liquid outlet of the peristaltic pump, and a liquid inlet of the peristaltic pump is communicated with the pickling liquid pool; the pickling solution peristaltic pump is electrically connected with the feedback controller.
7. An apparatus for controlled pickling of activated carbon based on solution PH and conductivity as in claim 5 wherein: a steam cavity is fixed at the bottom of the pickling kettle, and the air inlet of the steam cavity is communicated with the air outlet of the steam generator through the air inlet at the bottom of the pickling kettle; the steam cavity is provided with a plurality of steam nozzles, and check valves are arranged at the steam nozzles; the check valve is electrically connected with the feedback controller.
8. An apparatus for controlled pickling of activated carbon based on solution PH and conductivity as in claim 5 wherein: the measuring probe support is provided with a disc, each PH value measuring probe is circumferentially and uniformly distributed on the disc of the measuring probe support, and each solution conductivity measuring probe is circumferentially and uniformly distributed on the disc of the measuring probe support.
CN202111588810.XA 2021-12-23 2021-12-23 Method and device for controlling active carbon pickling based on solution pH value and conductivity Pending CN114308852A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202111588810.XA CN114308852A (en) 2021-12-23 2021-12-23 Method and device for controlling active carbon pickling based on solution pH value and conductivity
CN202210633655.7A CN114939570A (en) 2021-12-23 2022-06-07 Method and device for controlling active carbon pickling based on solution pH value and conductivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111588810.XA CN114308852A (en) 2021-12-23 2021-12-23 Method and device for controlling active carbon pickling based on solution pH value and conductivity

Publications (1)

Publication Number Publication Date
CN114308852A true CN114308852A (en) 2022-04-12

Family

ID=81054276

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202111588810.XA Pending CN114308852A (en) 2021-12-23 2021-12-23 Method and device for controlling active carbon pickling based on solution pH value and conductivity
CN202210633655.7A Pending CN114939570A (en) 2021-12-23 2022-06-07 Method and device for controlling active carbon pickling based on solution pH value and conductivity

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202210633655.7A Pending CN114939570A (en) 2021-12-23 2022-06-07 Method and device for controlling active carbon pickling based on solution pH value and conductivity

Country Status (1)

Country Link
CN (2) CN114308852A (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4470075B2 (en) * 1999-09-13 2010-06-02 株式会社パーカーコーポレーション Method for measuring component concentration of sulfuric acid-hydrofluoric acid type pickling solution
US9206380B2 (en) * 2013-03-14 2015-12-08 Ecolab Usa Inc. Method of generating carbonate in situ in a use solution and of buffered alkaline cleaning under an enriched CO2 atmosphere
CN203513799U (en) * 2013-09-10 2014-04-02 江西省首诺铜业有限公司 Copper foil circulation pickling device capable of automatically adjusting PH values
CN103539112B (en) * 2013-10-09 2015-06-10 中国科学院城市环境研究所 Acid pickling process and acid pickling system for active carbon
CN107812746A (en) * 2016-09-12 2018-03-20 鹏鼎控股(深圳)股份有限公司 Automatic water-replenishing device
CN106290770B (en) * 2016-09-14 2018-08-17 中国农业大学 A kind of the chpn monitoring method and system of water quality
CN112378980B (en) * 2020-11-12 2021-09-21 上海交通大学 Correction system and method for silk screen probe concentration detection device
CN113275306B (en) * 2021-04-19 2022-09-23 龙岩市华研活性炭科技有限公司 Dynamic rotational flow active carbon pickling machine
CN113245292B (en) * 2021-04-20 2022-09-20 广东韩研活性炭科技股份有限公司 Assembly line type activated carbon pickling and washing integrated machine

Also Published As

Publication number Publication date
CN114939570A (en) 2022-08-26

Similar Documents

Publication Publication Date Title
CN206444375U (en) Spray treatment device for water reducer
CN110184608A (en) A kind of electrolyte plasma polishing machine and its polishing method
CN114308852A (en) Method and device for controlling active carbon pickling based on solution pH value and conductivity
CN207204125U (en) Resin column automatic regeneration device
CN107662964B (en) Apparatus for generating sterilized water and method for producing the same
CN112403452B (en) Method and system for online judging activated carbon analysis efficiency and controlling total amount of heat source
CN210825582U (en) Acid-base neutralization treatment device for wastewater
CN209481355U (en) A kind of liquid waste treating apparatus
CN210071760U (en) Bromine production mixes chlorine ratio titration outfit
CN212017820U (en) Reaction unit is used in production of low-cost vanadium electrolyte
CN211339699U (en) Metal workpiece surface treatment device
CN209957546U (en) Waste water treatment device is used in trimethyl propyl ammonium bromide production
CN210683952U (en) Electrolyte plasma polishing machine
CN208250049U (en) A kind of integrated automatic dosing dephosphorization equipment
CN207655120U (en) A kind of liquefied ammonia and propionic acid reaction unit improving reaction efficiency
CN212120001U (en) Glycyrrhetinic acid production device
CN217595439U (en) Acid countercurrent cleaning machine with over-temperature protection device
CN217921702U (en) Test system for treating water through ozone
CN213053923U (en) Cooling liquid circulating device for machine tool
CN109179808A (en) One kind being used for dyeing iron-carbon micro-electrolysis sewage-treatment plant
CN218629492U (en) Trace calcium magnesium on-line analyzer
CN110779961A (en) Bicarbonate radical detection device, use method thereof and dialysis machine
CN215727719U (en) Industrial circulating water alkalinity on-line measuring device
CN215389293U (en) Novel waste acid liquid treatment device
CN214287669U (en) Waste liquid equalizing basin for waste water treatment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20220412

WD01 Invention patent application deemed withdrawn after publication