CN114940533B - Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system - Google Patents

Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system Download PDF

Info

Publication number
CN114940533B
CN114940533B CN202210698460.0A CN202210698460A CN114940533B CN 114940533 B CN114940533 B CN 114940533B CN 202210698460 A CN202210698460 A CN 202210698460A CN 114940533 B CN114940533 B CN 114940533B
Authority
CN
China
Prior art keywords
magnetic
pac
dosing
intelligent control
magnetic powder
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.)
Active
Application number
CN202210698460.0A
Other languages
Chinese (zh)
Other versions
CN114940533A (en
Inventor
刘畅
曾磊
陈广军
徐海飞
黄凯
李进
熊珍
胡雄超
鲍资茂
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.)
China Construction Third Bureau Green Industry Investment Co Ltd
Original Assignee
China Construction Third Bureau Green Industry Investment 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 China Construction Third Bureau Green Industry Investment Co Ltd filed Critical China Construction Third Bureau Green Industry Investment Co Ltd
Priority to CN202210698460.0A priority Critical patent/CN114940533B/en
Publication of CN114940533A publication Critical patent/CN114940533A/en
Application granted granted Critical
Publication of CN114940533B publication Critical patent/CN114940533B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • 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 an intelligent control system and method for adding a medicament in a magnetic coagulation sedimentation system. The online monitoring equipment is used for monitoring the water quality of inlet and outlet water of the magnetic coagulation sedimentation system in real time, data are transmitted to the intelligent control system, the opening quantity and frequency of the pneumatic diaphragm pumps are respectively calculated according to a configuration program, a dosing control logic algorithm and physical and chemical parameters, and meanwhile, instructions are fed back to the dispensing system in time through the PLC, so that the dosing quantity is adjusted. According to the invention, the PAC, the magnetic powder and the APAM are respectively regulated and controlled according to the precipitation treatment steps, the calculation logic of the dosage of the PAC and the magnetic powder and the adding proportion of the PAC solution and the APAM solution are provided, and the dosage of the medicament is adjusted through real-time data acquisition and calculation feedback, so that the intelligent fine control of the PAC, the magnetic powder and the APAM is realized, and the dosage and the production cost of the medicament in the sewage treatment process are obviously reduced while the stable and standard effluent quality is ensured.

Description

Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an intelligent control system and method for adding a medicament in a magnetic coagulation sedimentation system.
Background
As a physicochemical treatment technology in the field of sewage treatment, the magnetic coagulation sedimentation system is widely applied to the fields of municipal sewage, water environment treatment and the like, and has wide application prospect. The main production cost of the system in the later production operation process is the medicament cost which accounts for 50-80% of all the production cost of the system, so the control of the medicament adding amount in the system becomes the key of the main work content, cost reduction and efficiency improvement of the production operation of the system.
At present, the dosing management of the system in the production process mainly adopts manual dosing, and the dosing is dynamically adjusted according to the fluctuation change of key water quality indexes of water inlet and outlet of the system. Because a conservative strategy is generally adopted for ensuring that the quality of the effluent water reaches the standard stably, the adding amount is usually obviously higher than the actual demand amount, so that a large amount of medicament is wasted, and a rough medicament adding control mode causes high medicament cost on one hand, and causes a large amount of materialized sludge on the other hand, so that the sludge treatment, disposal and outward transportation cost is increased, and great cost pressure is caused to the production and operation of a sewage production and operation unit.
In the prior art, a utility model with publication number CN 216236213U discloses an automatic control system for total phosphorus concentration of a high-density sedimentation tank, which comprises an intelligent control device, a total phosphorus on-line analyzer, a coagulation area water inlet sampling device, a flocculation area sampling device and a coagulation area medicament feeding device; the intelligent control device controls the sampling device at the water inlet of the coagulation area and the sampling device of the flocculation area to sample at different time, the total phosphorus online analyzer analyzes and obtains the total phosphorus content of different samples, the intelligent control device calculates the drug adding amount in unit time according to the analysis result of the total phosphorus online analyzer, and the drug adding device in the coagulation area continuously adds drugs according to the drug adding amount in unit time. According to the technical scheme, the accurate feeding of the medicament is realized, but when the total phosphorus online analyzer analyzes data, an analysis result can be obtained within one hour, the total phosphorus content in the influent water is in a dynamic change process, the calculation result and the real-time result are in and out relatively long analysis time, the control delay is caused, and the accuracy of medicament feeding is influenced.
In view of the above, there is a need to design an intelligent control system and method for dosing in a magnetic coagulation sedimentation system to solve the above problems.
Disclosure of Invention
The invention aims to provide an intelligent control system and method for adding a medicament in a magnetic coagulation sedimentation system. The water quality of inlet water and outlet water of the magnetic coagulation sedimentation system is monitored in real time by utilizing an online monitoring device, data are transmitted to an intelligent control system in real time, the opening quantity and frequency of the pneumatic diaphragm pumps are respectively calculated according to a configuration program, a dosing control logic algorithm and physicochemical parameters, and meanwhile, instructions are fed back to the dispensing system in time through a PLC (programmable logic controller), so that each dosing amount is adjusted, and the real-time accurate control of each dosing amount is realized.
In order to achieve the purpose, the invention provides an intelligent control system for adding a medicament in a magnetic coagulation sedimentation system, which comprises the magnetic coagulation sedimentation system, a dispensing system connected with different dosing points of the magnetic coagulation sedimentation system through a pipeline, and an intelligent control system for analyzing the dosage according to a dosing control logic algorithm, wherein the dosing control logic algorithm comprises coagulant (PAC) dosage calculation logic, magnetic powder dosage calculation logic and flocculant (APAM) dosage calculation logic, the PAC dosage calculation logic and the magnetic powder dosage calculation logic realize the design of a double-safety gate for ensuring the stable and standard effluent quality of the system through setting target values and safety values of TP and SS, the dosage calculation logic of the APAM is calculated according to the dosage of the PAC according to a preset conversion ratio, and the preset conversion ratio is the adding volume ratio of a PAC solution to an APAM solution 1:9-1: 11, preferably, the ratio is 1.
As a further improvement of the invention, the magnetic coagulation sedimentation system comprises a rapid mixing reaction tank, a magnetic medium mixing reaction tank, a flocculation reaction tank and a sedimentation tank, wherein water inlet and outlet positions of the magnetic coagulation sedimentation system are respectively provided with online monitoring equipment for water quantity, TP and SS.
As a further improvement of the invention, the PAC, the APAM and the dispensing barrel of the magnetic powder are respectively connected with different dosing points of the magnetic coagulation sedimentation system through pipelines, wherein the dosing point of the PAC is arranged in the rapid mixing reaction tank, the dosing point of the magnetic powder is arranged in the magnetic medium mixing reaction tank, and the dosing point of the APAM is arranged in the flocculation reaction tank.
As a further improvement of the invention, the pipeline is respectively provided with a pneumatic diaphragm pump and an electromagnetic flowmeter for controlling the dosage of the medicament.
As a further improvement of the invention, the intelligent control system comprises a PLC and an industrial personal computer, a configuration program is arranged in the industrial personal computer, the physical and chemical parameters acquired by the online monitoring device are transmitted to the industrial personal computer through the PLC, and after the industrial personal computer processes data, the PLC transmits an instruction to the dispensing system.
As a further improvement of the invention, the intelligent control system is connected with the pneumatic diaphragm pump and the electromagnetic flowmeter, and the opening degree and the dosage of the pneumatic diaphragm pump are controlled through water quantity, water quality change and internal operation logic before and after the process.
As a further improvement of the invention, the intelligent control method for the drug adding of the magnetic coagulation sedimentation system adopts the intelligent control system for the drug adding of the magnetic coagulation sedimentation system in any one of the technical schemes for processing, and comprises the following steps:
s1, setting the conservative drug adding amount of PAC, magnetic powder and APAM in an intelligent control system in advance, setting target values and safety values of PAC, magnetic powder, TP and SS at the same time, and setting the drug adding amount ratio of PAC solution to APAM solution to be 1;
s2, after the water coming from the upper unit enters the magnetic coagulation sedimentation system, collecting the water inlet amount (Q) through the online monitoring equipment at the water inlet Step 1 ) TP concentration (C) TP in 1 ) SS concentration (C) SS advances to 1 ) Data are uploaded to an intelligent control system, and PAC dosing flow (Q) is uploaded at the same time PAC1 ) Magnetic powder medicine adding flow (Q) Magnetic powder 1 ) Data, wherein the data acquisition and uploading frequency is 1 minute; collecting inflow (Q) of magnetic coagulation sedimentation unit after 1 minute Step 2 ) TP concentration of feed water (C) TP in 2 ) SS concentration of influent water (C) SS goes into 2 ) TP concentration of effluent (C) TP out 2 ) And the SS concentration (C) of the effluent SS goes out of 2 ) And uploading to an intelligent control system;
s3, transmitting the physical and chemical parameters in the step S2 to an industrial control computer through a PLC (programmable logic controller), automatically retaining the data by the industrial control computer, respectively calculating the opening number and frequency of the pneumatic diaphragm pumps according to a configuration program, a dosing control logic algorithm and the physical and chemical parameters, and transmitting the opening number and frequency of the pneumatic diaphragm pumps corresponding to the PAC (programmable controller array), the magnetic powder and the APAM to a dispensing system through the PLC so as to adjust the corresponding dosing amount;
s4, circularly adjusting and controlling each subsequent dosing amount according to a dosing control logic algorithm;
and S5, the sewage after reaction enters a sedimentation tank for mud-water separation, the supernatant overflows through an overflow groove at the upper part and then enters a next treatment unit, part of the precipitated sludge at the lower part returns to the magnetic medium mixing reaction tank through a reflux pump, and part of the precipitated sludge is discharged through a residual sludge pump.
As a further improvement of the invention, the PAC solution is polyaluminium chloride solution, and the concentration is 9-11%; the APAM solution is prepared from anionic polyacrylamide with the molecular weight of 800-2000 ten thousand and water according to the solid-to-liquid ratio of 0.1% -0.15%; the magnetic powder is prepared from 200-400 meshes of magnetic powder according to the solid-to-liquid ratio of 1-2%; preferably, the concentration of the PAC solution is 10%, the solid-to-liquid ratio of the APAM solution is 0.12%, and the solid-to-liquid ratio of the magnetic powder is 1.5%.
As a further improvement of the invention, 99.5% of magnetic medium in the residual sludge is recovered by a magnetic flocculation recovery machine and then discharged into a magnetic medium mixing reaction tank again, and the dosage of the magnetic powder is the loss of the magnetic powder in the supplementary effluent SS.
The invention has the beneficial effects that:
1. the invention divides a precipitation system into a medicine dispensing system, an intelligent control system and a magnetic coagulation precipitation system, and respectively regulates and controls the dosage used correspondingly by a rapid mixing reaction tank, a magnetic medium mixing reaction tank and a flocculation reaction tank in the magnetic coagulation precipitation system, provides a logic calculation method of PAC dosage and magnetic powder dosage and a calculation method of APAM, monitors the water quality of inlet water and outlet water of the magnetic coagulation precipitation system in real time through online monitoring equipment, and transmits data to the intelligent control system in real time, the intelligent control system calculates the opening quantity and frequency of a pneumatic diaphragm pump according to a configuration program, a medicine feeding control logic algorithm and physicochemical parameters, and simultaneously feeds back the opening quantity and frequency to the medicine dispensing system in time through a PLC (programmable logic controller), thereby regulating each dosage and realizing real-time accurate control of each dosage.
2. The invention respectively regulates and controls PAC, magnetic powder and APAM, calculates the dosage of PAC and magnetic powder according to the dosage calculation logic diagram, simultaneously provides the dosage conversion proportion of PAC solution and APAM solution, calculates the dosage of APAM according to the dosage of PAC in the same ratio, feeds the dosage back to a dispensing system, and adjusts the dosage of APAM in real time, thereby realizing intelligent fine control of PAC, magnetic powder and APAM. When sewage treatment is carried out according to the conversion ratio of the dosage of PAC and APAM, which is set by the invention, the floc particles can be large, compact and stable, thereby achieving better flocculation and precipitation effects; when sewage treatment is carried out at a ratio lower than the conversion ratio, flocs are uneven in size and poor in flocculation effect; when the conversion ratio is higher than the conversion ratio, the treatment effect of the sewage treatment method is similar to that of the sewage treatment method, no obvious improvement effect exists, and the cost of the sewage treatment agent is greatly increased due to the high price of the APAM and the increase of the dosage of the APAM, so that the sewage treatment method is not beneficial to the economic operation of a sewage production operation unit.
3. The intelligent control method for adding the medicament into the magnetic coagulation sedimentation system can automatically calculate at high frequency (1 min/time) according to real-time monitoring data, adjust the dosage of PAC, magnetic powder and APAM in time, realize accurate administration control and save medicament cost. Meanwhile, the calculation method also carries out the design of a double-insurance gate for ensuring the stability and the standard of the effluent quality of the system, sets a target value and a safety value for the concentration of TP and SS of the effluent in a control system manually, designs different medicament adding control algorithms based on the matching of three possible working conditions in the actual sewage treatment process, and realizes the effective balance of the safety and the economy in the sewage treatment process. When the water quality of inlet water of the system fluctuates violently, the concentration of TP and SS of outlet water is larger than the target value and is smaller than the safety value, the calculation method increases the dosage to 1.5 times of the last stage, so as to preferentially ensure that the quality of the outlet water reaches the standard stably; when the concentrations of TP and SS of the effluent are greater than the safety values, the calculation method preferentially ensures that the quality of the effluent meets the standard stably by increasing the dosage to 2 times of the dosage in the previous stage. When the concentration of TP and SS of the effluent is less than the set target value, the calculation method can intermittently adjust each dosage per minute according to the fluctuation of water quality and quantity, so that the effluent quality is continuously close to the target value, the excessive use of each medicament is avoided, and the sewage treatment cost is reduced.
Drawings
FIG. 1 is a system flow diagram of the intelligent control system and method for dosing of a magnetic coagulation sedimentation system according to the present invention.
FIG. 2 is a data acquisition diagram of the intelligent control system and method for dosing a magnetic coagulation sedimentation system according to the present invention.
FIG. 3 is a logic diagram of PAC dosage calculation for the intelligent control system and method for drug dosage in a magnetic coagulation sedimentation system of the present invention.
FIG. 4 is a logic diagram of calculation of magnetic powder dosage for the intelligent control system and method for dosing a magnetic coagulation sedimentation system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to the accompanying drawings.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides an intelligent control system for adding a medicament for a magnetic coagulation sedimentation system, which comprises the magnetic coagulation sedimentation system, a dispensing system connected with different dosing points of the magnetic coagulation sedimentation system through a pipeline and an intelligent control system for analyzing the dosing amount according to a dosing control logic algorithm, wherein the dosing control logic algorithm comprises PAC dosing amount calculation logic, magnetic powder dosing amount calculation logic and APAM dosing amount calculation logic, the PAC dosing amount calculation logic and the magnetic powder dosing amount calculation logic realize the design of a double safety gate for ensuring the stability and the standard of the effluent quality of the system through the setting of target values and safety values of TP and SS, and the dosing amount calculation logic of the APAM is to calculate the dosing amount according to the preset conversion ratio according to the dosing amount of the PAC.
Specifically, the magnetic coagulation sedimentation system comprises a rapid mixing reaction tank, a magnetic medium mixing reaction tank, a flocculation reaction tank and a sedimentation tank, wherein water inlet and outlet positions of the magnetic coagulation sedimentation system are respectively provided with water quantity, TP (thermal transfer protocol) and SS (suspended substance) on-line monitoring equipment.
The PAC, APAM and magnetic dispensing barrel is respectively connected with different dosing points of a magnetic coagulation sedimentation system through pipelines, wherein the PAC dosing points are arranged in a rapid mixing reaction tank, the magnetic dosing points are arranged in a magnetic medium mixing reaction tank, the APAM dosing points are arranged in a flocculation reaction tank, and meanwhile, a pneumatic diaphragm pump and an electromagnetic flowmeter are respectively arranged on the pipelines and used for controlling the dosing amount of the medicament.
Specifically, the intelligent control system is connected with the pneumatic diaphragm pump and the electromagnetic flowmeter, the intelligent control system comprises a PLC and an industrial control computer, a configuration program is arranged in the industrial control computer, physical and chemical parameters collected by the online monitoring equipment are transmitted to the industrial control computer through the PLC, the industrial control computer automatically retains data, the opening number and frequency of the pneumatic diaphragm pump are respectively calculated according to the configuration program, a dosing control logic algorithm and the physical and chemical parameters, and the opening number and frequency of the pneumatic diaphragm pump corresponding to the PAC, the magnetic powder and the PAM are transmitted to the dispensing system through the PLC, so that the corresponding dosage is adjusted.
The invention also provides an intelligent control method for adding the magnetic coagulation sedimentation system medicament, the intelligent control method for adding the magnetic coagulation sedimentation system medicament is processed according to the intelligent control system for adding the magnetic coagulation sedimentation system medicament in any one of the technical schemes, and as shown in figures 2-4, the intelligent control method comprises the following steps:
s1, setting the conservative dosage of PAC, magnetic powder and APAM in an intelligent control system in advance, simultaneously setting target values and safety values of PAC, magnetic powder, TP and SS, and setting the optimal dosage volume ratio of PAC solution to APAM solution as 1;
s2, after the water coming from the upper unit enters the magnetic coagulation sedimentation system, acquiring the water inlet amount (Q) through the online monitoring equipment at the water inlet position Step 1 ) TP concentration (C) TP in 1 ) SS concentration (C) SS goes into 1 ) Data are uploaded to an intelligent control system, and PAC dosing flow (Q) is uploaded at the same time PAC1 ) Magnetic powder medicine-adding flow data (Q) Magnetic powder 1 ) The data acquisition and uploading frequency is 1 minute; collecting the inflow (Q) of the magnetic coagulation precipitation unit after 1 minute Step 2 ) TP concentration of feed water (C) TP in 2 ) SS concentration of influent water (C) SS goes into 2 ) TP concentration of effluent (C) TP out 2 ) And the SS concentration (C) of the effluent SS goes out of 2 ) And uploading to an intelligent control system;
s3, transmitting the physical and chemical parameters in the step S2 to an industrial control computer through a PLC (programmable logic controller), automatically retaining the data by the industrial control computer, respectively calculating the opening number and frequency of the pneumatic diaphragm pumps according to a configuration program, a dosing control logic algorithm and the physical and chemical parameters, and transmitting the opening number and frequency of the pneumatic diaphragm pumps corresponding to the PAC (programmable controller array), the magnetic powder and the APAM to a dispensing system through the PLC so as to adjust the corresponding dosing amount;
s4, circularly adjusting and controlling each subsequent dosing amount according to a dosing control logic algorithm;
and S5, the sewage after reaction enters a sedimentation tank for mud-water separation, the supernatant overflows through an overflow groove at the upper part and then enters a next treatment unit, part of the precipitated sludge at the lower part returns to the magnetic medium mixing reaction tank through a reflux pump, and part of the precipitated sludge is discharged through a residual sludge pump.
Specifically, the drug adding control logic algorithm calculates PAC and magnetic powder drug adding amount per minute through a PAC drug adding amount and magnetic powder drug adding amount cyclic calculation formula, simultaneously calculates the drug adding amount of APAM according to the drug adding amount of PAC and a preset conversion proportion, and the PAC drug adding amount calculation logic and the magnetic powder drug adding amount calculation logic realize a 'double safety gate' design for ensuring the stable and standard effluent quality of a system through setting target values and safety values of TP and SS.
Specifically, the intelligent control logic for PAC dosing is as follows: firstly, an initial conservative adding quantity (Q) is set in the intelligent control system PAC1 ) To ensure that the effluent TP and SS of the magnetic coagulation sedimentation system reach the standard, and simultaneously set the target value (C) of the TP TP target value ) And a safety value (C) TP safety value ) And target value (C) of SS SS target value ) Setting the data acquisition uploading frequency of the on-line monitoring equipment to be 1 minute, and enabling the water inlet flow (Q) to be measured through the PLC Step 1 ) TP concentration of feed water (C) TP in 1 ) PAC dosing flow (Q) PAC1 ) Uploading data to an intelligent control system; collecting inflow (Q) of magnetic coagulation sedimentation unit after 1 minute Inlet 2 ) TP concentration of feed water (C) TP in 2 ) Concentration of effluent TP (C) TP out 2 ) And the SS concentration (C) of the effluent SS goes out of 2 ) Analyzing according to the PAC adding amount calculation logic diagram, and respectively calculating C SS goes out of 2 <C SS target value And C is TP out 2 <C TP target value 、C TP target value ≤C TP out 2 <C TP safety value Or C TP safety value ≤C TP out of 2 PAC dosage (Q) PAC2 )；C SS target value ≤C SS goes out of 2 At that time, PAC dose (Q) PAC2 ) And Q is PAC2 The corresponding opening number and frequency instructions of the pneumatic diaphragm pumps are transmitted to a dispensing system through a PLC (programmable logic controller), and the dosage of PAC (programmable controller) is further adjusted. And adjusting and changing the subsequent PAC dosage according to the logic cycle.
Specifically, the intelligent control logic for adding the magnetic powder medicament is as follows: firstly, an initial conservative adding amount (Q) is set in the intelligent control system Magnetic powder 1 ) To ensure that the SS of the effluent of the magnetic coagulation sedimentation system reaches the standard and simultaneously set the target value (C) of the SS SS target value ) And a safety value (C) SS safety value ) And setting the data acquisition uploading frequency of the on-line monitoring equipment to be 1 minute, and enabling the PLC to control the water inlet flow (Q) of the sedimentation tank of the magnetic coagulation sedimentation system Step 1 ) SS concentration (C) SS goes into 1 ) Uploading data to an intelligent control system; collecting the water inlet flow (Q) of the sedimentation tank of the magnetic coagulation sedimentation unit after 1 minute Step 2 ) SS concentration of influent water (C) SS goes into 2 ) The SS concentration (C) of the effluent SS goes out of 2 ) Analyzing according to the calculated logical diagram of the magnetic powder adding amount, and respectively calculating C SS goes out of 2 <C SS target value 、C SS target value ≤C SS goes out of 2 <C SS safety value Or alternatively C SS safety value ≤C SS goes out of 2 The amount of the magnetic powder (Q) is measured Magnetic powder 2 ) And Q is Magnetic powder 2 The corresponding opening number and frequency instructions of the pneumatic diaphragm pumps are transmitted to a dispensing system through a PLC (programmable logic controller), and then the dosage of the magnetic powder is adjusted. Adjusting and changing the subsequent dosage of the magnetic powder, and circulating and reciprocating according to the logic.
Specifically, in step S1, the PAC solution is a polyaluminum chloride solution, and the concentration is 10%; the APAM solution is prepared by anionic polyacrylamide with the molecular weight of 800-2000 ten thousand and water according to the solid-to-liquid ratio of 0.12 percent; the magnetic powder is prepared from 200-400 meshes of magnetic powder according to the solid-to-liquid ratio of 1.5%.
Specifically, in the step S5, 99.5% of the magnetic medium in the excess sludge is recovered by the magnetic flocculation recovery machine and then discharged into the magnetic medium mixing reaction tank again, and the amount of the magnetic powder is the amount of the magnetic powder lost in the make-up effluent SS.
The working principle of the intelligent control system for adding the medicament in the magnetic coagulation sedimentation system provided by the invention is explained below.
The utility model provides an intelligent control system for magnetism coagulation sedimentation system medicament is thrown, as shown in figure 1, sewage gets into magnetism coagulation sedimentation system after higher level unit handles and handles, the water inflow volume of punishment do not gathering in the water inflow department of magnetism coagulation sedimentation system, TP concentration, SS concentration data, higher level unit water inflow gets into the rapid mixing reaction tank, the pond water and PAC carry out the rapid coagulation reaction, later get into magnetic medium mixing reaction tank, get into flocculation reaction tank again after carrying out the intensive mixing with the magnetic, carry out the flocculation reaction with APAM. And (3) the sewage after reaction enters a sedimentation tank for mud-water separation, the supernatant overflows through an overflow groove at the upper part and then enters a next treatment unit, the effluent water quantity, TP concentration and SS concentration data are acquired at the effluent position of the magnetic coagulation sedimentation system, part of the precipitated sludge at the lower part returns to the magnetic medium mixed reaction tank through a reflux pump, part of the precipitated sludge is discharged through a residual sludge pump, and 99.5 percent of the magnetic medium is recycled through a magnetic deflocculation recycling machine and then discharged into the magnetic medium mixed reaction tank again. When the magnetic coagulation sedimentation system treats water from a superior unit, the PLC uploads the acquired data and PAC dosing flow and magnetic powder dosing flow data to an industrial control computer in real time, calculates the dosing amounts of the PAC, the magnetic powder and the APAM according to a dosing control logic algorithm, transmits an instruction to the dispensing system through the PLC, and adjusts the dosing amounts of the medicament in real time, so that intelligent fine control of the PAC, the magnetic powder and the APAM is realized.
In summary, the intelligent control system and method for dosing the magnetic coagulation sedimentation system disclosed by the invention utilize the online monitoring equipment to monitor the water quality of inlet water and outlet water of the magnetic coagulation sedimentation system in real time, transmit data to the intelligent control system in real time, calculate the opening number and frequency of the pneumatic diaphragm pumps according to a configuration program, a dosing control logic algorithm, physicochemical parameters, and set target values and safety values of TP and SS, and feed back instructions to the dispensing system in time through the PLC, thereby adjusting the dosing amount. The invention respectively carries out regulation and control of PAC, magnetic powder and APAM according to the precipitation treatment steps, provides a calculation logic diagram of the dosage of PAC and magnetic powder and the dosage proportion of PAC solution and APAM solution, and regulates the dosage of medicament in real time through real-time acquisition and calculation feedback of data, thereby realizing intelligent fine control of PAC, magnetic powder and APAM, reducing the operating cost of sewage production and operation units.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (12)

1. The utility model provides an intelligent control system that is used for magnetism coagulating sedimentation system medicament to throw which characterized in that: the system comprises a magnetic coagulation sedimentation system, a medicine dispensing system connected with different medicine adding points of the magnetic coagulation sedimentation system through pipelines, and an intelligent control system for analyzing the medicine adding amount according to a medicine adding control logic algorithm, wherein the medicine adding control logic algorithm comprises a PAC medicine adding amount calculation logic, a magnetic powder medicine adding amount calculation logic and an APAM medicine adding amount calculation logic, and the medicine adding amount calculation logic of the APAM is calculated according to a preset conversion proportion according to the medicine adding amount of the PAC;
the PAC dosage calculation logic is as follows: firstly, an initial conservative adding quantity Q is set in an intelligent control system PAC1 Target value C of TP TP target value And a safety value C TP safety value And target value C of SS SS target value Respectively calculating the SS concentration C of the effluent SS goes out 2 <C SS target value And the concentration of TP discharged water C TP out 2 <C TP target value PAC dose Q after N + 1min PAC2 ：
Figure FDA0004076096250000011
When C is present SS goes out 2 <C SS target value And C TP target value ≤C TP out 2 <C TP safety value PAC dose Q after N + 1min PAC2 ：
Figure FDA0004076096250000012
When C is present SS goes out of 2 <C SS target value And C TP safety value ≤C TP out 2 When, or C SS goes out of 2 ≥C SS target value PAC dose Q after N + 1min PAC2 ：
Figure FDA0004076096250000013
Wherein Q is Step 1 A water inflow of N minutes, C TP in 1 TP concentration of influent water, Q, of N minutes Step 2 The inflow rate of N + 1min, C TP in 2 Inlet TP concentration for N +1 min;
the magnetic powder injection quantity calculation logic is as follows: firstly, an initial conservative adding quantity Q is set in an intelligent control system Magnetic powder 1 Target value C of SS SS target value And a safety value C SS safety value Respectively calculating the SS concentration C of the effluent SS goes out of 2 <C SS target value Then, the magnetic powder injection amount Q after N +1 minute Magnetic powder 2 ：
Figure FDA0004076096250000014
When C is present SS target value ≤C SS goes out of 2 <C SS safety value Then, the magnetic powder injection amount Q after N +1 minute Magnetic powder 2 ：
Figure FDA0004076096250000021
When C is present SS safety value ≤C SS goes out of 2 Then, the magnetic powder injection amount Q after N +1 minute Magnetic powder 2 ：
Figure FDA0004076096250000022
Wherein, C SS goes into 1 SS concentration at N min, C SS goes into 2 The feed water SS concentration was N +1 min.
2. The intelligent control system for the dosing of a magnetic coagulation sedimentation system medicament as claimed in claim 1, wherein: the PAC dosage calculation logic and the magnetic powder dosage calculation logic realize the design of a double-safety gate for ensuring the stable and standard effluent quality of the system through setting the target value and the safety value of TP and SS, and the preset conversion proportion is the adding volume proportion of the PAC solution to the APAM solution of 1:9-1.
3. The intelligent control system for dosing of magnetic coagulation sedimentation system agents as claimed in claim 2, wherein: the adding volume ratio of the PAC solution to the APAM solution is 1.
4. The intelligent control system for the dosing of a magnetic coagulation sedimentation system medicament as claimed in claim 1, wherein: the magnetic coagulation sedimentation system comprises a rapid mixing reaction tank, a magnetic medium mixing reaction tank, a flocculation reaction tank and a sedimentation tank, wherein water inlet and outlet positions of the magnetic coagulation sedimentation system are respectively provided with water quantity, TP and SS on-line monitoring equipment.
5. The intelligent control system for dosing of magnetic coagulation sedimentation system agents as claimed in claim 4, wherein: the PAC, the APAM and the magnetic powder dispensing barrel are respectively connected with different dosing points of the magnetic coagulation sedimentation system through pipelines, wherein the PAC dosing points are arranged in the rapid mixing reaction tank, the magnetic powder dosing points are arranged in the magnetic medium mixing reaction tank, and the APAM dosing points are arranged in the flocculation reaction tank.
6. The intelligent control system for dosing of magnetic coagulation sedimentation system agents as claimed in claim 4, wherein: the pipeline is respectively provided with a pneumatic diaphragm pump and an electromagnetic flowmeter for controlling the dosage of the medicament.
7. The intelligent control system for dosing of magnetic coagulation sedimentation system agents as claimed in claim 4, wherein: the intelligent control system comprises a PLC and an industrial personal computer, a configuration program is arranged in the industrial personal computer, physical and chemical parameters acquired by the online monitoring equipment are transmitted to the industrial personal computer through the PLC, and after the industrial personal computer processes data, the PLC transmits instructions to the dispensing system.
8. The intelligent control system for the dosing of a magnetic coagulation sedimentation system medicament as claimed in claim 6, wherein: the intelligent control system is connected with the pneumatic diaphragm pump and the electromagnetic flowmeter, and controls the opening and closing degree and the dosage of the pneumatic diaphragm pump through the water quantity before and after the process, the water quality change and the internal operation logic.
9. An intelligent control method for adding a medicament into a magnetic coagulation sedimentation system, which is characterized in that the intelligent control system for adding the medicament into the magnetic coagulation sedimentation system is adopted for processing according to any one of claims 1 to 7, and comprises the following steps:
s1, setting the conservative dosage of PAC, magnetic powder and APAM in an intelligent control system in advance, setting target values and safety values of PAC, magnetic powder, TP and SS at the same time, and setting the dosage proportion of PAC solution and APAM solution;
s2, after water from the upper unit enters a magnetic coagulation sedimentation system, acquiring the water inflow amount, TP concentration and SS concentration data through online monitoring equipment at the water inflow position and uploading the data to an intelligent control system, and uploading PAC dosing flow and magnetic powder dosing flow data at the same time, wherein the data acquisition and uploading frequency is 1 minute; collecting the inflow water flow, the concentration of TP (total phosphorus) of inflow water, the concentration of SS (suspended substance) of inflow water, the concentration of TP of outflow water and the concentration of SS of outflow water of the magnetic coagulation sedimentation unit after 1 minute and uploading the collected water flow, concentration of TP of inflow water, concentration of SS of inflow water and concentration of SS of outflow water to an intelligent control system;
s3, transmitting the physical and chemical parameters in the step S2 to an industrial control computer through a PLC (programmable logic controller), automatically retaining the data by the industrial control computer, respectively calculating the opening number and frequency of the pneumatic diaphragm pumps according to a configuration program, a dosing control logic algorithm and the physical and chemical parameters, and transmitting the opening number and frequency of the pneumatic diaphragm pumps corresponding to the PAC (programmable controller array), the magnetic powder and the APAM to a dispensing system through the PLC so as to adjust the corresponding dosing amount;
s4, circularly adjusting and controlling each subsequent dosing amount according to a dosing control logic algorithm;
and S5, the sewage after reaction enters a sedimentation tank for mud-water separation, the supernatant overflows through an overflow groove at the upper part and then enters a next treatment unit, part of the precipitated sludge at the lower part returns to the magnetic medium mixing reaction tank through a reflux pump, and part of the precipitated sludge is discharged through a residual sludge pump.
10. The intelligent control method for dosing of a magnetic coagulation sedimentation system medicament according to claim 9, characterized in that: the PAC solution is polyaluminium chloride solution, and the concentration is 9-11%; the APAM solution is prepared from anionic polyacrylamide with the molecular weight of 800-2000 ten thousand and water according to the solid-to-liquid ratio of 0.1% -0.15%; the magnetic powder is prepared from 200-400 meshes of magnetic powder according to the solid-to-liquid ratio of 1-2%.
11. The intelligent control method for dosing of a magnetic coagulation sedimentation system medicament as claimed in claim 10, wherein: the concentration of the PAC solution is 10%, the solid-to-liquid ratio of the APAM solution is 0.12%, and the solid-to-liquid ratio of the magnetic powder is 1.5%.
12. The intelligent control method for dosing of a magnetic coagulation sedimentation system medicament according to claim 9, characterized in that: and recovering 99.5% of magnetic medium from the residual sludge through a magnetic flocculation recovery machine, and then discharging the residual sludge into a magnetic medium mixed reaction tank again, wherein the dosage of the magnetic powder is the loss of the magnetic powder in the supplementary effluent SS.
CN202210698460.0A 2022-06-20 2022-06-20 Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system Active CN114940533B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210698460.0A CN114940533B (en) 2022-06-20 2022-06-20 Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210698460.0A CN114940533B (en) 2022-06-20 2022-06-20 Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system

Publications (2)

Publication Number Publication Date
CN114940533A CN114940533A (en) 2022-08-26
CN114940533B true CN114940533B (en) 2023-03-31

Family

ID=82911003

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210698460.0A Active CN114940533B (en) 2022-06-20 2022-06-20 Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system

Country Status (1)

Country Link
CN (1) CN114940533B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101659462A (en) * 2009-09-18 2010-03-03 河海大学 Automatic dosing control system of coagulant and operation method
CN101717143A (en) * 2009-11-24 2010-06-02 河海大学 Method for controlling automatic flocculant addition
CN104463689A (en) * 2014-12-08 2015-03-25 环境保护部南京环境科学研究所 Method for determining discharge capacity of drainage basin fresh water aquiculture pollution
JP2017103659A (en) * 2015-12-03 2017-06-08 日本電信電話株式会社 Scheduling device and method
CN107540069A (en) * 2017-10-23 2018-01-05 河海大学 A kind of full-automatic coagulant dosage system
CN208413947U (en) * 2018-05-23 2019-01-22 青岛太平洋化工装备有限公司 Intelligent Magneto separate pretreatment system for sewage
CN110183027A (en) * 2019-06-03 2019-08-30 太平洋水处理工程有限公司 A kind of adaptive magnetic medium coagulating sedimentation water process autocontrol method
CN111484198A (en) * 2020-04-22 2020-08-04 江苏凯米膜科技股份有限公司 Intelligent water quality purification phosphorus removal device, control system and control method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101659462A (en) * 2009-09-18 2010-03-03 河海大学 Automatic dosing control system of coagulant and operation method
CN101717143A (en) * 2009-11-24 2010-06-02 河海大学 Method for controlling automatic flocculant addition
CN104463689A (en) * 2014-12-08 2015-03-25 环境保护部南京环境科学研究所 Method for determining discharge capacity of drainage basin fresh water aquiculture pollution
JP2017103659A (en) * 2015-12-03 2017-06-08 日本電信電話株式会社 Scheduling device and method
CN107540069A (en) * 2017-10-23 2018-01-05 河海大学 A kind of full-automatic coagulant dosage system
CN208413947U (en) * 2018-05-23 2019-01-22 青岛太平洋化工装备有限公司 Intelligent Magneto separate pretreatment system for sewage
CN110183027A (en) * 2019-06-03 2019-08-30 太平洋水处理工程有限公司 A kind of adaptive magnetic medium coagulating sedimentation water process autocontrol method
CN111484198A (en) * 2020-04-22 2020-08-04 江苏凯米膜科技股份有限公司 Intelligent water quality purification phosphorus removal device, control system and control method

Also Published As

Publication number Publication date
CN114940533A (en) 2022-08-26

Similar Documents

Publication Publication Date Title
CN103570190B (en) Method for controlling feeding amount of chemical phosphorus removal reagents of water reclamation plants based on fuzzy control
CN110862188A (en) Chemical phosphorus removal accurate dosing system and control method
CN110386721B (en) Electroplating wastewater precise comprehensive treatment management system and implementation method thereof
CN102228749B (en) Quantitative method for coagulation reagent for slime water
JPH07204412A (en) Apparatus for automatic determination of chemical injection ratio and method for automatic determination
CN103482824A (en) Method and device for quickly recycling nitrogen and phosphorus nutrient substances in urine
CN205933447U (en) Seawater desalination pretreatment systems
CN203021378U (en) Phosphating wastewater treatment device
JP2002239307A (en) Apparatus for automatically injecting flocculant for water cleaning based on streaming current value
CN113636723A (en) Dephosphorization of handling domestic sewage adds medicine automated control system
CN211078571U (en) Flocculation precipitation system for water plant
CN106348414A (en) Tail water enhanced flocculation and inclined plate settlement coupling treatment system of sewage plant and technology method
CN114940533B (en) Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system
JP4784241B2 (en) Flocculant injection method and apparatus for water purification process
CN210825516U (en) Elevated tank dosing system
SE536998C2 (en) Method to optimize the chemical precipitation process in water and wastewater treatment plants
JP2007098287A (en) Method for controlling operation of water purifying process
CN106219708B (en) It is a kind of to be flowed back coagulating treatment system and method based on the reinforcement sludge that automatically controls
CN206051650U (en) It is a kind of based on automatically control reinforcement sludge backflow coagulating treatment system
CN211198709U (en) Control adds medicine return sludge coagulating sedimentation system based on zeta electric potential and SS
CN213865812U (en) Automatic control system for magnetic precipitation sewage treatment
CN109761443A (en) Water purification system based on flocculation sedimentation
CN215924586U (en) Water treatment system for deep fluoride removal
CN108191116A (en) Ore dressing plant water treatment system and water treatment technology
CN211111599U (en) Device for simultaneously removing fluorine ions and nitrate nitrogen in graphite production wastewater

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
GR01 Patent grant
GR01 Patent grant