CN102096406B - Simulation control system and control method for unsteady change of water inflow during biological waste water treatment - Google Patents
Simulation control system and control method for unsteady change of water inflow during biological waste water treatment Download PDFInfo
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention discloses a simulation control system and a simulation control method for unsteady change of water inflow during biological waste water treatment. The system comprises a management layer, a control layer and an execution layer, wherein the management layer comprises a database for storing detection data and an upper computer for running the database; the control layer is a lower computer programmable controller used for controlling the rotating speed of a peristaltic pump; the execution layer is a motor control cabinet (MCC) used for executing an operation command of the lower computer; a simulation system is controlled by controlling a water inflow cycle, a water inflow initial phase angle and the peak and trough of a water inflow sine curve; and a water inflow control flow is adjusted, so that water inflow modes and water inflow conditions of various biological waste water treatment processes are realized, a practical water inflow condition encountered by a sewage treatment plant and a project is simulated to the maximum extent, a simulation system for the unsteady changes of water quality and water inflow in a biological waste water treatment process is realized, and various water inflow change situations can be freely simulated.
Description
Technical field
The invention belongs to technical field of water pollution control in the environmental protection; The analog control system that relates to a kind of influent quality water yield dynamic change of developing based on biological effluent treatment technology; The characteristics that the influent quality water yield unstable state of simulation actual sewage treatment plant changes; Be applicable to that with actual cities sewage or high ammonia-nitrogen wastewater be process object, the lab scale of laboratory study scale or pilot scale biological effluent treatment technology.
Background technology
All adopt on to the lab scale of wastewater treatment or pilot scale research mode that quantitatively water inlet or timing are intake to study according to the relevant now research institution of the inquiry of data and universities and colleges; Quantitatively remain a substantially invariable amount among the process of the i.e. operation of water inlet and intake the intermittent water inflow at times of regularly intaking promptly.There are two problems in the biological effluent treatment shop characteristic of studying under this water intake mode condition: 1, the amount of inlet water condition is too single, and technology has certain one-sidedness to the Pollutant Treatment ability under the inflow condition in order to decide; 2, lack research, the ability of severe weather conditions such as reply heavy rain in the unpredictable actual waste water processing procedure of test findings to the anti-water yield impact load of technology performance; 3, the waste of the resource and the energy, bench-scale successful biological effluent treatment technology are gone into operation in practical engineering application failure in a single day, will mean tremendous loss, do not meet sustainable wastewater treatment theory.Test findings such as the shop characteristic of studying under the water inlet condition at regular time and quantity and actual production operating condition differ greatly, and can not instruct practical engineering application well.If in bench-scale lab scale or pilot scale research; The inflow dynamic rule that faces in the exploitation simulation actual waste water treatment project; The multiple water inlet change condition of real-time change; Under the prerequisite of stable state water inlet process characteristic research, expand the operational characteristic research under the unstable state water inlet condition, will remedy the above defective that existing wastewater treatment correlative study mechanism and universities and colleges exist, applying of scientific payoffs and yield-power conversion process are had important effect.
Summary of the invention
The objective of the invention is provides a cover to be applicable to the inflow unstable state change modeling system of laboratory study scale biological effluent treatment technology to different amount of inlet water of sewage treatment plant and change of water quality characteristics.This system changes conventional quantitative fixed point water intake mode; Waste water can in time respond water intake mode according to predefined water inlet control strategy; The water quality and the water yield dynamic change of implement device water inlet; Expand the research of the anti-water quality and quantity impact load of device performance, the successful Application of ultimate guarantee research device in actual engineering.
The present invention adopts following technological means to realize:
A kind of biological effluent treatment technology inflow unstable state change modeling control system comprises administration and supervision authorities, key-course and execution level; Administration and supervision authorities are to have storage to detect the database of data and the host computer of runtime database, and key-course is the slave computer Programmable Logic Controller of control peristaltic pump rotating speed, and execution level is for carrying out the MCC motor controlling cabinet of slave computer operational order; Host computer is electrically connected with the slave computer Programmable Logic Controller, and passes to slave computer with under the setup parameter; The slave computer Programmable Logic Controller is connected with measuring instrument, MCC motor controlling cabinet, valve regulated or VFC cabinet respectively; Measuring instrument is connected with the MCC motor controlling cabinet, be connected between MCC motor controlling cabinet and valve regulated or the VFC cabinet; On-line sensor is connected with measuring instrument, and raw water pump, reflux pump and stirring machine are connected with the MCC motor controlling cabinet, is connected between fan blower and valve regulated or the VFC cabinet.
Aforesaid detection data comprise: the aeration flow of dissolved oxygen concentration, pH value, each section flow of inlet water, aerobic section.
Aforesaid service data comprises: digital quantity input, digital quantity output, analog quantity input, analog quantity output, intermediate variable.
Aforesaid MCC motor controlling cabinet is provided with mobile phone/automatic change over.
A kind of control method of biological effluent treatment technology inflow unstable state change modeling control system, control inflow cycle, water inlet initial phase angle and water inlet sinusoidal curve Wave crest and wave trough;
Wherein, the described control inflow cycle may further comprise the steps:
Start-up system is selected automatic running status, and cycle variable quantity X1, water inlet maximal value A1 and minimum value and three programs of starting phase angle are moved simultaneously;
Set initial change amount X0, in the burst length, the unit time, detect the actual change amount of moving the generation cycle;
Set water inlet predetermined amount intermediate value A2=A1/2, the initial value A3=A2+A0 of total inflow during the production zero phase;
Circular measure initial phase angle Y1 and total inflow variation X2 multiply each other and produce intermediate variable Z0, and sinZ0 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of the total amount of intaking, with radian is total water inlet increment A5=A3+A4 that the cycle changes;
The variation of described control water inlet initial phase angle may further comprise the steps:
Start-up system is selected automatic running status, and cycle variable quantity X1, water inlet maximal value A1 and minimum value and three programs of starting phase angle are moved simultaneously;
Set initial change amount X0, continue the total inflow X2 that a chronomere is produced in operation, then the total inflow X3=X2+ initial phase angle of initial inflow;
Set predetermined amount intermediate value A2=A1/2, the initial value A3=A2+A0 of total inflow during the production zero phase;
Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and sinZ1 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes;
The variation of described control water inlet sinusoidal curve Wave crest and wave trough may further comprise the steps;
Start-up system is selected automatic running status, and cycle variable quantity X1, water inlet maximal value A1 and minimum value and three programs of starting phase angle are moved simultaneously;
Set initial change amount X0, continue the total inflow X2 that a chronomere is produced in operation, then the total inflow X3=X2+ initial phase angle of initial inflow;
Set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, the initial value A3=A2+A0 of total inflow during the production zero phase;
Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and sinZ1 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes.
The aforesaid burst length is 100MS, and the unit time is 60 seconds.
The present invention compared with prior art has following remarkable advantages and beneficial effect:
The variation of municipal wastewater influent load is simulated through real-time change total inflow by this system, and the confirming of total inflow changes the value proportionally dwindle according to the water inlet of some typical urban of investigation.According to the variation of total inflow, control the flow of each section water inlet.The software that the control inflow changes is worked out through the PLC trapezoid figure language.The steering order of this control system mainly contains: each wriggling priming of pump or stop to also have the instruction of system operation.The dynamic change parameter of this control system simulation actual sewage treatment plant day inflow mainly contains: period of change is set; Maximum inflow is set, minimum inflow is set, the water inlet initial phase angle is set; Integrated combination through following three kinds of control flows realizes biological process of wastewater treatment influent quality water yield unstable state change modeling system, can freely simulate various amount of inlet water situations of change:
(1) the amount of inlet water cycle changes control flow: confirm the setting value that the flow of inlet water cycle changes, as 24 hours or 12 hours be one-period, period of change can setting arbitrarily between 1 minute to 32000 hours.
(2) the water inlet initial phase angle changes control flow: designed the setting of water inlet initial phase angle, through changing the flow that the water inlet initial phase angle changes initial water inlet.
(3) water inlet sinusoidal curve Wave crest and wave trough changes control flow: the maximum inflow setting value and the minimum inflow setting value that have designed inflow; Not simply to begin to maximum flow, confirm the peak-to-valley value of actual water inlet with maximum flow setting value and minimum flow setting value from zero flow.
The present invention realizes the water intake mode and the amount of inlet water condition of multiple biological effluent treatment technology according to the adjustment of water inlet control flow; The water inlet situation that faces of simulation actual sewage treatment plant and engineering at utmost; Biological treatment is handled the performance test research of pollutant under the various water intake modes of full-scale development, on the basis of reducing experimental scale and cost, for the practical engineering application of technology more true and reliable raw data and technical support is provided.
Description of drawings
Fig. 1 is biological waste water treatment process control system figure;
Fig. 2 is an amount of inlet water dynamic changing curve in the one-period;
Fig. 3 is amount of inlet water cycle modified flow figure;
Fig. 4 is water inlet initial phase angle dynamic change process flow diagram;
Fig. 5 regulates process flow diagram for water inlet dynamic changing curve Wave crest and wave trough.
Embodiment
Below in conjunction with Figure of description specific embodiment of the present invention is explained.
Fig. 1 is the control system of biological waste water treatment process, explains in the face of various piece down.
The biological effluent treatment process control system mainly is to accomplish through host computer (PC), slave computer Programmable Logic Controller (PLC) and operation layer motor controlling cabinet (MCC) are common.Explain in the face of various piece down.
Host computer (PC) is electrically connected with slave computer Programmable Logic Controller (PLC), and slave computer Programmable Logic Controller (PLC) is connected with measuring instrument, operation layer MCC motor controlling cabinet, valve regulated or VFC cabinet respectively; Measuring instrument is connected with operation layer MCC motor controlling cabinet, be connected between operation layer motor controlling cabinet (MCC) and valve regulated or the VFC cabinet; On-line sensors such as organism, nitrogen and dissolved oxygen DO are connected with measuring instrument, and electric equipments such as raw water pump, reflux pump and stirring machine are connected with operation layer MCC motor controlling cabinet, are connected between fan blower and valve regulated or the VFC cabinet.
Host computer (PC) picture can write various steering orders and pass various variable quantity parameters down to Programmable Logic Controller (PLC), also can gather running status and operational factor simultaneously.
Host computer adopts common microcomputer (PC); System is WENDOS-XP; Installation application software is " industrial monitoring configuration software "; Store various detection data through setting up stored data base, the analog data that this system detected has: the aeration flow of dissolved oxygen concentration, pH value, each section flow of inlet water, aerobic section etc.Runtime database is used for the various digital quantities inputs (DI) that are relevant to system operation of configuration, digital quantities outputs (DO), analog quantitys inputs (AI), analog quantitys outputs (AO), intermediate variable (M) etc.More than the variable of two databases be linked through communications protocol and the slave computer (PLC) that weaves, realize passing to slave computer (PLC) under the setup parameter of host computer (PC), change the parameter of control strategy at any time.The detected parameters of slave computer (PLC) uploads to host computer (PC), in real time the data of display simulation amount.
The program of slave computer (PLC) internal memory is the system control strategy that weaves according to technological requirement; Instruct through various logic operational order and mathematical operation and to carry out control strategy; Control each peristaltic pump and change the adjusting that rotating speed reaches flow, accomplish the dynamic change of simulation actual sewage treatment plant day inflow according to the requirement of dynamic change.
Motor controlling cabinet (MCC) is to carry out the duty that various operational orders that slave computer (PLC) sends are controlled online measuring instrument, and the operation of every raw water pump, reflux pump and stirrer and fan blower stops.Simultaneously be uploaded to slave computer (PLC) to every current running status of equipment, motor controlling cabinet (MCC) is provided with on the spot, manual and long-range three kinds of modes of operation." on the spot " promptly start and stop to control the other control of the machine that is commonly called as on electrical equipment machine next door, " manually " is the switch board button control, and " long-range " is promptly by PC control.
This system forms the three-layer network control system.Host computer (PC) is administration and supervision authorities, just can remotely changing operational factor and Correction and Control strategy at host computer, show the running status of storage running data and electrical equipment simultaneously.Slave computer (PLC) is a key-course; CPU in the middle of this layer has stored the core control strategy of " improvement advanced nitrogen and phosphorus removal by step feed process control systems under the unstable state water inlet condition ", and it can accept host computer (PC) to the change of current operational factor and the correction of control strategy.Give host computer (PC) the various data upload of coming simultaneously from the operation layer collection.Motor controlling cabinet (MCC) can be thought operation layer, and it has two kinds of functions, and the steering order that strict execution slave computer (PLC) is assigned under auto state feeds back to slave computer (PLC) to current equipment running status simultaneously.When at manual state, carry out artificial operation, the operating right of this system is that manual manually-operated authority is higher than upward bit manipulation automatically.
1. administration and supervision authorities host computer (PC)
What this system was pursued is that system stability is flexible with mechanism, to host computer (PC) parameter request is:
A. adopt brand of computer;
The b.CPU class is high more good more, at least more than the P IV;
C. internal memory is at least more than the 2G;
D. the hard drive space that needs 600M;
The e.CD/DVD CD-ROM drive uses during install software;
F. LPTx ports or USB mouth use when inserting softdog and use during report output;
G.VAG and SVAG display card and display, video memory can be supported 1024*768 or high resolving power more more than 64M;
H. mouse, keyboard;
I. sound card is supported audible alarm output;
J. Ethernet card is supported ethernet communication;
K. computing machine has been pre-installed Windows XP professional version;
L. the homemade industrial data monitoring and control configuration software installed of configuration software.
Host computer (PC) adopts ethernet communication with the communication of slave computer (PLC), and this system of reply practical engineering application can form the control system of the ethernet communication of maximum ten main website host computers (PC) and maximum 128 substation slave computers (PLC).
2. key-course slave computer (PLC)
This system selected Programmable Logic Controller (PLC) is an internationally renowned brand.According to the needs of system, CPU module, 8DI digital quantity input module, 8AI analog quantity load module, 4AO analog output module, ethernet communication module have been disposed at 40.
The control strategy that the storage of CPU module memory weaves according to technological requirement, this this machine of CPU module has 16DO point, 24DI point.Power supply is fit to on-the-spot the use for 220VAC.The PORT mouth of CPU module is connected with Ethernet switch through ethernet module and is being connected with host computer (PC).Host-host protocol is the EPA stipulations.
Expansion module AI adopt band photoelectricity to isolate input/output port, guarantee the safe and reliable of system.
3. operation layer motor controlling cabinet (MCC)
This motor controlling cabinet (MCC) is provided with mobile phone/automatic change over, selects when manual that the direct labor operates the starting of electrical equipment or stops on switch board, selects when automatic by upper control.Be provided with emergency stop switch, when finding abnormal running, can press emergency stop switch and stop this operation.But direct control raw water pump on the switch board, stirrer and fan blower show each raw water pump simultaneously, reflux pump, the running status indication of stirrer and fan blower.
Concrete control method and step are:
The dynamic change parameter of this control system simulation actual sewage treatment plant day inflow mainly contains: period of change is set, and maximum inflow is set, minimum inflow is set, the water inlet initial phase angle is set.Integrated combination through following three kinds of control flows realizes biological effluent treatment technology influent quality water yield unstable state change modeling system, can freely simulate various amount of inlet water situations of change, specifies in conjunction with Fig. 3, Fig. 4 and Fig. 5.
(1) the amount of inlet water cycle changes control flow (Fig. 3)
This flow process purpose was to realize freely choosing the setting value that the flow of inlet water cycle changes, as 24 hours or 12 hours.
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three programs of starting phase angle are moved simultaneously afterwards.At first, take the burst length of 100mS, setting 60 seconds is the unit transformation period, moves the variable quantity X1 in generation cycle, in conjunction with preset initial change amount X0, continues operation and produces per 60 a seconds variation total inflow change system X2 once.Secondly, set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, the initial value A3=A2+A0 of total inflow during the production zero phase.Final program 3, Circular measure initial phase angle Y1 and total inflow variation factor X2 multiply each other and produce intermediate variable Z0, and sinZ0 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of water inlet total amount, with radian is total water inlet increment A5=A3+A4 that the cycle changes.Therefore, above-mentioned three programs unite stack operation, the cycle of the total amount that can realize intaking changes, this system cycle setting value is 1 minute to 32000 hours.
(2) the water inlet initial phase angle changes control flow (Fig. 4)
This flow process purpose is to set the water inlet initial phase angle, through changing the flow that the water inlet initial phase angle changes initial water inlet.
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three programs of starting phase angle are moved simultaneously afterwards.At first; Take the burst length of 100mS; Setting 60 seconds is the unit transformation period, and the variable quantity X1 in operation generation cycle is in conjunction with preset initial change amount X0; Continue operation and produce per 60 seconds variation total inflow change system X2 once, the then X3=X2+ of the total inflow system initial phase angles of initial inflow.Secondly, set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, the initial value A3=A2+A0 of total inflow during the production zero phase.Final program 3, Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and sinZ1 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes.Therefore, the stack of uniting of above-mentioned three programs moves, and can realize the variation of initial inflow through the setting value that changes the water inlet initial phase angle.
(3) water inlet sinusoidal curve Wave crest and wave trough changes control flow (Fig. 5)
The purpose of this flow process is to realize freely setting inflow, rather than simply begins to maximum flow from zero flow, changes the peak value of actual water inlet through the minimum and maximum inflow setting value of design inflow.
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three programs of starting phase angle are moved simultaneously afterwards.At first, take the burst length of 100mS, setting 60 seconds is the unit transformation period; Operation produces independent increment X1; In conjunction with preset initial change amount X0, continue operation and produce per 60 seconds variation total inflow change system X2 once, the then X3=X2+ of the total inflow system initial phase angles of initial inflow.Secondly, set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, the initial value A3=A2+A0 of total inflow during the production zero phase.Final program 3, Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and sinZ1 multiplies each other with water inlet total amount intermediate value A2 and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes.Therefore, the stack of uniting of above-mentioned three programs moves, and can freely change the water inlet peak value.
Claims (1)
1. the control method of a biological effluent treatment inflow unstable state change modeling control system is characterized in that: comprise that the amount of inlet water cycle changes control flow, water inlet initial phase angle variation control flow and water inlet sinusoidal curve Wave crest and wave trough and changes control flow;
Wherein, the amount of inlet water cycle changes control flow, its objective is to realize freely choosing the setting value that the flow of inlet water cycle changes;
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three steps of starting phase angle are moved simultaneously afterwards; Step at first, in the burst length of taking 100mS, setting 60 seconds is the unit transformation period, moves the variable quantity X1 in generation cycle, in conjunction with preset initial change amount X0, continues operation and produces per 60 a seconds variation total inflow variation factor X2 once; The step of next is set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, the initial value A3=A2+A0 of total inflow during the production zero phase; Last step, Circular measure initial phase angle Y1 and total inflow variation factor X2 multiply each other and produce intermediate variable Z0, and the predetermined amount intermediate value A2 of sinZ0 and water inlet total amount multiplies each other and generates the variable quantity A4 of water inlet total amount, with radian is total water inlet increment A5=A3+A4 that the cycle changes; Above-mentioned three steps unite stack operation, the cycle of the total amount that can realize intaking changes, the system cycle setting value is 1 minute to 32000 hours;
The water inlet initial phase angle changes control flow; Its objective is and set the water inlet initial phase angle, through changing the flow that the water inlet initial phase angle changes initial water inlet;
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three steps of starting phase angle are moved simultaneously afterwards; Step at first; Take the burst length of 100mS; Setting 60 seconds is the unit transformation period, and the variable quantity X1 in operation generation cycle is in conjunction with preset initial change amount X0; Continue operation and produce per 60 seconds variation total inflow variation factor X2 once, then the total inflow coefficient X3=X2+ initial phase angles of initial inflow; The step of next is set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, and the initial value A3=A2+A0 of total inflow during the production zero phase, wherein A0 is preset inflow minimum value; Last step, Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and the predetermined amount intermediate value A2 of sinZ1 and water inlet total amount multiplies each other and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes; The stack of uniting of above-mentioned three steps moves, and can realize the variation of initial inflow through the setting value that changes the water inlet initial phase angle;
Water inlet sinusoidal curve Wave crest and wave trough changes control flow, and its purpose is to realize freely setting inflow, rather than simply begins to maximum flow from zero flow, changes the peak value of actual water inlet through the minimum and maximum inflow setting value of design inflow;
Start-up system is selected auto state, is non-manual state this moment, and cycle variable quantity, water inlet maximal value and minimum value and three steps of starting phase angle are moved simultaneously afterwards; Step at first; Take the burst length of 100mS; Setting 60 seconds is the unit transformation period, and the variable quantity X1 in operation generation cycle is in conjunction with preset initial change amount X0; Continue operation and produce per 60 seconds variation total inflow change system X2 once, the then X3=X2+ of the total inflow system initial phase angles of initial inflow; The step of next is set water inlet total amount maximal value A1, predetermined amount intermediate value A2=A1/2 so, and the initial value A3=A2+A0 of total inflow during the production zero phase, wherein A0 is preset inflow minimum value; Last step, Circular measure initial phase angle Y1 and total inflow variation factor X3 multiply each other and produce intermediate variable Z1, and the predetermined amount intermediate value A2 of sinZ1 and water inlet total amount multiplies each other and generates the variable quantity A4 of water inlet total amount, with total water inlet increment A5=A3+A4 that radian changes; Therefore, the stack of uniting of above-mentioned three steps moves, and can freely change the water inlet peak value.
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