CN102955469A - Control device and control method of vacuum drainage pumping station - Google Patents
Control device and control method of vacuum drainage pumping station Download PDFInfo
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- CN102955469A CN102955469A CN2012104179971A CN201210417997A CN102955469A CN 102955469 A CN102955469 A CN 102955469A CN 2012104179971 A CN2012104179971 A CN 2012104179971A CN 201210417997 A CN201210417997 A CN 201210417997A CN 102955469 A CN102955469 A CN 102955469A
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Abstract
The invention discloses a control device and a control method of a vacuum drainage pumping station. The control device comprises a signal input module, an analyzing module, an execution module and an information output device. The analyzing module is respectively connected with the signal input module, the execution module and the information output module; the execution module is respectively connected with a power source, a vacuum pump and a sewage pump; and the information output device is used for displaying parameters of the system to the outside and for giving out alarm information. The control method includes the steps of: 1) online measuring and statistical monitoring of the gas-water ratio Kt in a statistical period by using the analyzing module; 2)conducting corresponding control operation to working vacuum degree, and realizing dynamic compensation of the vacuum degree and the automatic adjustment of the gas-water ratio; 3) monitoring the vacuum degree Vpt inside a vacuum pot, the sewage level Hlt and the operating state of the sewage pump, and conducting corresponding operations to the operation of the vacuum pump and the sewage pump to control the vacuum pump and the sewage pump in sections; and 4) conducting corresponding control operations to the vacuum pump and the sewage pump.
Description
Technical field
The present invention relates to the sewage collecting technical field, relate in particular to a kind of control device and control method thereof of vacuum drainage pumping plant.
Background technology
The vacuum sewage collection system is made of vacuum drainage terminal, vacuum pipe and vacuum drainage pumping plant.The vacuum drainage pumping plant is comprised of vacuum tank, vacuum pump, sewage pump, control system etc. again.The vacuum drainage pumping plant utilizes the sewage that negative pressure carries vacuum pipe and the air trapping of following to vacuum collection tank, uses sewage pump and vacuum pump respectively with sewage and water Bas Discharged again, to keep wastewater level in the vacuum tank and vacuum tightness in setting range.The operation of vacuum pump and sewage pump requires the expenditure of energy.For discharging equivalent gas or sewage, the energy consumption of vacuum pump or sewage pump depends primarily on the interior vacuum tightness of vacuum tank of setting, and the larger then vacuum pump of this vacuum tightness or sewage pump energy consumption are higher.
Gas-water ratio refers to enter or discharge the volume ratio of air and the sewage of system.System for normal operation, best gas-water ratio is in the metastable scope, although reduce the energy consumption that system works vacuum tightness can reduce vacuum pump and dredge pump, but cross low vacuum tightness and be unfavorable for that on the one hand sewage and air are in the conveying of vacuum pipe, be unfavorable for also that on the other hand air enters the vacuum sewage collection system by the vacuum drainage terminal, and then gas-water ratio is reduced.Otherwise gas clean-up will increase the gas-water ratio of system, be beneficial to drainage flow in the pipe.But too high gas-water ratio then can be brought the waste of energy consumption, or means that leakage has occured in system.The control method that present vacuum drainage pumping plant generally adopts is:
High limit and the lower bound of A, initialization system working vacuum degree.Survey vacuum tightness in the vacuum tank by vacuum pressure sensor (or electro connecting pressure gauge, vacuum switch etc.).Low vacuum is prescribed a time limit in low vacuum in vacuum tank, and vacuum pump automatically starts and keeps operation until the system vacuum degree reaches the shutdown of the high vacuum pump in limited time of vacuum tightness.Vacuum tightness is lower than low vacuum in limited time again in vacuum tank, and vacuum pump will start again.
High liquid level and the low liquid level of B, setting vacuum tank work liquid level.Survey liquid level in the vacuum tank by liquid level sensor or liquid level gauge.Sewage level reaches or when being higher than high liquid level in vacuum tank, sewage pump automatically start and keep operation until when liquid level is down to low liquid level in the vacuum tank sewage pump shut down.When liquid level in the vacuum tank reaches high liquid level again, sewage pump will start again.
Because the system of actual motion can be because user's usage variance has different gas-water ratios.Therefore, can set the high limit of vacuum tightness higher than the necessary vacuum tightness of sewage transport in the control method that generally adopts, so that these different gas-water ratios still are higher than the required optimum gas liquor ratio of sewage transport.But such control method also is unfavorable for the energy-saving run of vacuum pump.
Control method for existing vacuum drainage pumping plant, if leakage has occured in the somewhere in the vacuum sewage collection system, air is entered in the system, except the pumpage of the air capacity that enters greater than vacuum pump, the system vacuum degree can't be maintained outside the situation within the working range, for the air capacity that the enters situation in the pumpage of vacuum pump still, existing monitoring means does not possess the ability of finding such leakage, and system can not send warning message yet.
Summary of the invention
Purpose of the present invention is exactly in order to solve the prior art above shortcomings, and a kind of control device and control method of vacuum drainage pumping plant is provided; Reduce statistical error, realized monitoring, warning and the automatically adjusting of gas-water ratio, improved system flexibility, reduced overall energy consumption; Improve sewage pump than the probability of working under the low vacuum, reduced the sewage pump energy consumption, also reduced the problem of sewage pump in condition of high vacuum degree down blow generation cavitation erosion.
To achieve these goals, the present invention adopts following technical scheme:
A kind of control device of vacuum drainage pumping plant, comprise signal input module, analysis module, execution module, information output apparatus, described analysis module is connected with signal input module, execution module, information output apparatus respectively, analysis module be used for to input signal make analyze judge, to the operating instruction of execution module transmission vacuum pump and sewage pump, to information output apparatus transmission system parameters and information warning; Described execution module is connected with power supply, vacuum pump and sewage pump respectively, is used for accepting analysis module and sends instruction and control vacuum pump and the operation of sewage pump; Described information output apparatus is used for external display system parameter and sends information warning.
Described signal input module comprises gas meter, sewage flowmeter, vacuum degree measuring equipment, the first level switch, the second level switch, the 3rd level switch, described gas meter is located on the pipeline of vacuum pump outlet, described sewage flowmeter is located on the pipeline of sewage pump outlet, the measure portion of vacuum degree measuring equipment is positioned at the vacuum tank inner top, the probe portion of the first level switch, the second level switch, the 3rd level switch is positioned at vacuum tank, and signal input module is connected with analysis module by signal cable.
Described execution module comprises contactor and contact thereof; Described contactor is connected with the analysis module circuit and by analysis module control, and the contact of described contactor is connected in the loop of power supply and vacuum pump, sewage pump, and the Realization analysis module is to the control of described vacuum pump and described sewage pump.
Described analysis module is single-chip microcomputer, industrial computer or programmable logic controller (PLC); Described information output apparatus comprises display screen, pilot lamp, hummer, printer, disk, described display screen is used for showing text and numerical information, described pilot lamp and described hummer are for the fast demonstration of running status and information warning, described printer and described disk are used for output and the storage of information, described display screen, printer and disk are connected with analysis module by data cable, and described pilot lamp and hummer are connected with analysis module by power lead.
Vacuum degree measuring equipment adopts vacuum pressure sensor, electro connecting pressure gauge or vacuum switch.
A kind of control method of vacuum drainage pumping plant may further comprise the steps:
1) utilizes described analysis module, to the gas-water ratio K in the measurement period
tCarry out on-line measurement, reach statistical monitoring, described gas-water ratio K
tFor: the ratio of the gas average discharge of the vacuum pump in measurement period and the sewage average discharge of sewage pump;
2) according to different gas-water ratio K
t, the working vacuum degree is made corresponding control operation, the dynamic compensation of realizing vacuum tightness and the automatic adjusting of gas-water ratio;
3) to vacuum tightness V in the vacuum tank
Pt, sewage level H
LtAnd the monitoring of sewage pump running status, operation is made corresponding operation, is carried out segmentation control to vacuum pump and sewage pump, simultaneously display system parameter and send information warning;
4) according to different vacuum tightness V
Pt, and the sewage pump duty vacuum pump and sewage pump are made corresponding control operation.
Described step 1) comprises the steps:
A. preset the initial high limit V of system works vacuum tightness
Pmax0With initial lower bound V
Pmin0
B. utilize gas meter and sewage flowmeter to monitor respectively the gas flow Q of vacuum pump and sewage pump discharge
gWith discharge of sewage Q
l
C. utilize the gas volume V that is discharged by vacuum pump and sewage pump in statistic period T of analysis module statistics
gWith sewage volume V
l, and then calculate the interior gas-water ratio K of this measurement period
t
Utilize following formula to obtain gas-water ratio K
t: K
t=V
g/ V
l,
Wherein,
T is current time, t
xBe integration variable, the measurement period of T for setting.
Described step 2) may further comprise the steps:
A. preset lower bound gas-water ratio K
Min, high limit gas-water ratio K
Max
B. first with gas-water ratio K
tWith default lower bound gas-water ratio K
MinMake comparisons, if K
t＜K
Min, the air mass flow that then enters or discharge Vacuum Pumps Station is compared the discharge of sewage and is lower than normal range K
Min～K
Max, information output apparatus sends information warning, and analysis module is according to gas-water ratio K simultaneously
tValue, in real time at the initial high limit V of predetermined system working vacuum degree
Pmax0With initial lower bound V
Pmin0The basis on add respectively compensation rate (1-K
t/ K
Min) (V
Pmaxp-V
Pmax0), as the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
Pmint, make gas-water ratio K
tGet back to gradually normal range K
Min～K
MaxIn, wherein, V
PmaxpThe final vacuum that can reach for the vacuum pump that configures; If K
t〉=K
Min, the amount that enters the air of system is enough carried sewage, the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintLimit V with the initial height of the system works vacuum tightness of presetting respectively
Pmax0With initial lower bound V
Pmin0Equate;
C. again with this gas-water ratio K
tWith default high limit gas-water ratio K
MaxMake comparisons, if K
t≤ K
Max, gas-water ratio is normal; If K
tK
Max, the air mass flow that then enters or discharge the vacuum drainage pumping plant is compared the discharge of sewage and has been exceeded normal range, and information output apparatus sends information warning.
Described step 3) may further comprise the steps:
A. preset the termination of pumping liquid level H of sewage pump
Lmin, the highest pump liquid level H that opens
LmaxWith the minimum pump liquid level H that opens
Lmaxm
B. utilize level switch to survey the interior sewage level H of current vacuum tank
1t, vacuum degree measuring equipment is monitored the vacuum tightness V in the current vacuum tank
Pt
C. after system brings into operation, at first judge monitoring sewage level H
LtWhether meet or exceed the minimum pump liquid level H that opens of sewage pump
LmaxmIf do not reach, be H
Lt＜H
Lmaxm, then sewage pump keeps stopped status until liquid level reaches the minimum pump liquid level H that opens
LmaxmAfter enter again follow-up flow process; If reach, be H
Lt〉=H
Lmaxm, then judge sewage level H
LtWhether meet or exceed the highest pump liquid level H that opens of sewage pump
LmaxIf: reach, be H
Lt〉=H
Lmax, then start sewage pump; If reached minimum open the pump liquid level but do not reach the highest and open the pump liquid level, be H
Lmaxm≤ H
Lt＜H
1max, then judge again vacuum tightness V
PtAverage True reciprocal of duty cycle 0.5 (V with system works
Pmaxt+ V
Pmint) relative size; If current vacuum tightness V
PtBeing lower than system's Average True reciprocal of duty cycle is V
Pt＜0.5 (V
Pmaxt+ V
Pmint), then start sewage pump, otherwise then treat liquid level H
LtBe increased to the highest pump liquid level H that opens
LmaxOr vacuum tightness V
PtBe reduced to Average True reciprocal of duty cycle 0.5 (V
Pmaxt+ V
Pmint) below again sewage pump is started; After the each startup of sewage pump, with sewage level H
LtBe reduced to sewage pump termination of pumping liquid level H
LminAfter, sewage pump is shut down.
Described step 4) may further comprise the steps:
A) utilize vacuum degree measuring equipment to monitor the interior vacuum tightness V of current vacuum tank
Pt:
B) after system brings into operation, at first with current vacuum tightness V
PtWith the highest pump vacuum tightness V that opens of vacuum pump
PminmMake comparisons, wherein V
Pminm=V
Pmaxt-x
Vp(V
Pmaxt-V
Pmint), x
VpFor setting coefficient, x
VpSpan 0.5＜x
Vp＜1;
If current vacuum tightness V
PtBe higher than the highest pump vacuum tightness V that opens
Pminm, then vacuum pump keeps stopped status until current vacuum tightness V
PtBe reduced to the highest pump vacuum tightness V that opens
PminmAfter enter again follow-up flow process;
If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
Pminm, be V
Pt＜V
Pminm, then continue current vacuum tightness V
PtWith the minimum pump vacuum tightness V that opens of vacuum pump
PminMake comparisons;
If current vacuum tightness V
PtBe lower than the minimum pump vacuum tightness V that opens of vacuum pump
Pmin, then start vacuum pump;
If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
PminAnd be higher than the minimum pump vacuum tightness V that opens
Pminm, be V
Pmint≤ V
Pt＜V
Pminm, then judge again the duty of current sewage pump;
If sewage pump is in stopped status, then starts vacuum pump, otherwise then treat vacuum tightness V
PtBe reduced to the minimum pump vacuum tightness V that opens
PminmOr restart vacuum pump after the sewage pump shutdown; Vacuum pump is treated vacuum tightness V after starting
PtBe increased to termination of pumping vacuum tightness V
PmaxRear shutdown.
Principle of work of the present invention: described gas meter is connected with analysis module by signal cable, is used for the gas flow that Measuring Vacuum is discharged.Described sewage flowmeter is connected with analysis module by signal cable, is used for measuring the discharge of sewage that sewage pump is discharged.Described vacuum pressure sensor is connected with analysis module by signal cable, is used for measuring the vacuum tightness in the vacuum tank.Described level switch is connected with analysis module by signal cable, is used for surveying the sewage level in the vacuum tank.Described analysis module is connected with gas meter, sewage flowmeter, vacuum pressure sensor, level switch, execution module and information output apparatus, being used for that the signal of input is made analysis judges, to the operating instruction of execution module transmission vacuum pump and sewage pump, to information output apparatus transmission system parameters and information warning.Described execution module and analysis module, power supply, vacuum pump is connected with sewage pump, is used for accepting the instruction that analysis module sends and controls vacuum pump and the operation of sewage pump.Described information output apparatus is connected with analysis module, is used for external display system parameter and sends information warning.
The present invention has realized the statistical monitoring of gas-water ratio by to the gas flow of discharge vacuum tank and monitoring and the running integral disposal route of the discharge of sewage.Comparison by with actual gas-water ratio and system's optimal gas-water ratio scope has realized warning to the leak case that may exist that too high gas-water ratio is corresponding, has realized the compensation of dynamic duty vacuum ranges to crossing low gas-water ratio.The running status of sewage pump is determined according to the sewage level in the vacuum tank and vacuum tightness.The running status of vacuum pump is according to the running status segmentation control of the vacuum tightness in the vacuum tank and sewage pump.
Beneficial effect of the present invention:
1, the statistics of gas-water ratio has reduced statistical error, data smoothing and representative by gas flow and the discharge of sewage of discharging vacuum tank in a period of time are done running integral processing acquisition.
2, by the comparison with actual gas-water ratio and system's optimal gas-water ratio scope, the leak case that may exist that too high gas-water ratio is corresponding has been realized warning; Realized the compensation of dynamic duty vacuum ranges to crossing low gas-water ratio, so that gas-water ratio is tending towards optimum range gradually.The auto-compensation of the automatic adjusting of gas-water ratio and working vacuum degree scope, improved system flexibility, system is stronger to the adaptability of various applying working conditions, the overall energy consumption of vacuum pump is lower, rather than simply improve system works vacuum tightness in order to ensure extreme adverse condition, cause the energy consumption waste under the common state.
3, improved sewage pump than the probability of working under the low vacuum, and vacuum pump starts the probability (working time of staggering sewage pump and vacuum pump) that the system vacuum degree is raise and increase the sewage pump energy consumption when having reduced sewage pump work, the sewage pump overall energy consumption is reduced, also reduced the possibility of sewage pump in condition of high vacuum degree down blow generation cavitation erosion.
4, the present invention has realized monitoring, the warning of gas-water ratio and has automatically regulated, and has improved system flexibility, has reduced overall energy consumption; Improve sewage pump than the probability of working under the low vacuum, reduced the sewage pump energy consumption.
Description of drawings
Fig. 1 is vacuum drainage pumping station controlling system structural representation;
Fig. 2 is running integral method schematic diagram;
Fig. 3 is that monitoring and the dynamic duty vacuum tightness of gas-water ratio is regulated schematic diagram;
Fig. 4 is sewage pump operation control flow schematic diagram;
Fig. 5 is vacuum pump operation control flow schematic diagram;
Fig. 6 is vacuum drainage pumping plant electric control theory figure.
Among the figure, 1. gas meter, 2. sewage flowmeter 2, and 3. vacuum pressure sensor 3,4a. the first level switch, 4b. the second level switch, 4c. the 3rd level switch, 5. analysis module, 6. execution module, 7. information output apparatus, 8. vacuum tank, 9. vacuum pump, 10. sewage pump.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
A kind of control device of vacuum drainage pumping plant, in conjunction with Fig. 1 to Fig. 6, comprise signal input module, analysis module 5, execution module 6, information output apparatus 7, described analysis module 5 is connected with signal input module, execution module 6, information output apparatus 7 respectively, analysis module 5 be used for to input signal make analyze judge, to the operating instruction of execution module 6 transmission vacuum pumps 9 and sewage pump 10, to information output apparatus 7 transmission system parameters and information warning; Described execution module 6 is connected with sewage pump with power supply, vacuum pump 9 respectively and is connected, and is used for accepting analysis module 5 and sends instruction and control vacuum pump 9 and the operation of sewage pump 10; Described information output apparatus 7 is connected with analysis module 5, is used for external display system parameter and sends information warning.
Described signal input module comprises gas meter 1, sewage flowmeter 2, vacuum pressure sensor 3, the first level switch 4a, the second level switch 4b, the 3rd level switch 4c, described gas meter 1 is located on the pipeline of vacuum pump 9 outlets, described sewage flowmeter 2 is located on the pipeline of sewage pump 10 outlets, and the probe portion that the measure portion of vacuum pressure sensor 3 is positioned at vacuum tank 8, the first level switch 4a, the second level switch 4b, the 3rd level switch 4c is positioned at vacuum tank.Signal input module is connected with analysis module 5 by signal cable.The measure portion of vacuum pressure sensor 3 is located at vacuum tank 8 tops.
Among Fig. 6, QS is isolating switch, and Circuits System is had overload protection and short-circuit protection function.The first level switch 4a, the second level switch 4b, the 3rd level switch 4c are used for surveying vacuum tank 8 interior liquid levels.Vacuum pressure sensor 3 is used for measuring vacuum tank 8 interior vacuum pressures.Gas meter 1 and sewage flowmeter 2 are used for measuring by vacuum pump 9 and the gas of sewage pump 10 discharges and the flow of sewage.
Described execution module 6 comprises contactor and contact thereof; The coil of described contactor is connected with analysis module 5 circuit and is controlled by analysis module 5, described contactor KM1, the contact of KM2 is connected in motor M 2 loops of motor M 1, sewage pump 10 of power supply and vacuum pump 9, the control of the motor circuit of 5 pairs of vacuum pumps 9 of Realization analysis module and sewage pump 10.When analysis module 5 control vacuum pumps 9 or sewage pump 10 unlatching, send instruction to contactor KM1 or KM2, contactor KM1 or KM2 coil get electric, contactor KM1 or the adhesive of KM2 contact, power supply is connected with the motor M 1 of vacuum pump 9 or the motor M 2 of sewage pump 10, and vacuum pump 9 or sewage pump 10 start.Otherwise; when analysis module 5 control vacuum pumps 9 or sewage pump 10 shutdown; send instruction to contactor KM1 or KM2; the coil losing electricity of contactor KM1 or KM2; the contact separation of contactor KM1 or KM2; the motor M 1 of power supply and vacuum pump 9 or the motor M 2 of sewage pump 10 are disconnected, and vacuum pump 9 or sewage pump 10 are shut down.
Described analysis module 5 is single-chip microcomputer, industrial computer or programmable logic controller (PLC); Described information output apparatus 7 comprises display screen, pilot lamp, hummer, printer, disk, display screen is used for showing text and numerical information, pilot lamp and described hummer are for the fast demonstration of running status and information warning, printer and described disk are used for output and the storage of information, display screen, printer and disk are connected with analysis module 5 by data cable, and pilot lamp and hummer are connected with analysis module 5 by power lead.
A kind of control method of vacuum drainage pumping plant may further comprise the steps:
1) utilizes described analysis module 5, to the gas-water ratio K in the measurement period
tCarry out on-line measurement, reach statistical monitoring, described gas-water ratio K
tFor: the ratio of the discharge of sewage of the gas flow of vacuum pump 9 and sewage pump 10;
2) utilize analysis module 5, according to different gas-water ratio K
t, vacuum tank 8 working vacuum degree are made corresponding control operation, the dynamic compensation of realizing vacuum tightness and the automatic adjusting of gas-water ratio;
3) utilize analysis module 5, to vacuum tank 8 interior vacuum tightness V
Pt, sewage level H
LtAnd the monitoring of sewage pump 10 running statuses, 10 operations are made corresponding operation, are carried out segmentation control to vacuum pump 9 and sewage pump, simultaneously display system parameter and send information warning;
4) utilize analysis module 5, the vacuum tightness V different according to vacuum tank 8
Pt, and sewage pump 10 duties vacuum pump and sewage pump are made corresponding control operation.
Described step 1) comprises the steps:
A. preset the initial high limit V of system vacuum tank working vacuum degree
Pmax0With initial lower bound V
Pmin0
B. utilize gas meter 1 and sewage flowmeter 2 to monitor respectively the gas flow Q of vacuum pump 9 and sewage pump 10 discharges
gWith discharge of sewage Q
l
C. utilize the gas volume V that is discharged by vacuum pump 9 and sewage pump 10 in statistic period T of analysis module 5 statistics
gWith sewage volume V
l, and then calculate the interior gas-water ratio K of this measurement period
t
Utilize following formula to obtain gas-water ratio K
t: K
t=V
g/ V
l,
Wherein,
T is current time, t
xBe integration variable, the measurement period of T for setting.
Described step 2) may further comprise the steps:
A. preset lower bound gas-water ratio K
Min, high limit gas-water ratio K
Max
B. first with gas-water ratio K
tWith default lower bound gas-water ratio K
MinMake comparisons, if K
t＜K
Min, the air mass flow that then enters or discharge Vacuum Pumps Station is compared the discharge of sewage and is lower than normal range K
Min～K
Max, information output apparatus sends information warning: " may there be impeded drainage in vacuum pipe ", analysis module 5 is according to gas-water ratio K simultaneously
tValue, in real time at the initial high limit V of predetermined system working vacuum degree
Pmax0With initial lower bound V
Pmin0The basis on add respectively compensation rate (1-K
t/ K
Min) (V
Pmaxp-V
Pmax0), as the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintThe raising of working vacuum degree will make gas-water ratio K
tGet back to gradually normal range K
Min～K
MaxIn.Wherein, V
PmaxpBe 9 final vacuums that can reach of vacuum pump that configure; If K
t〉=K
Min, the amount that enters the air of system is enough carried sewage, the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintLimit V with the initial height of the system works vacuum tightness of presetting respectively
Pmax0With initial lower bound V
Pmin0Equate.
Again with this gas-water ratio K
tWith default high limit gas-water ratio K
MaxMake comparisons, if K
t≤ K
Max, gas-water ratio is normal; If K
tK
Max, the air mass flow that then enters or discharge the vacuum drainage pumping plant is compared the discharge of sewage and has been exceeded normal range, and information output apparatus sends information warning " may there be leakage in the vacuum sewage collection system ".
Described step 3) may further comprise the steps:
A. preset the termination of pumping liquid level H of sewage pump 10
Lmin, the highest pump liquid level H that opens
1maxWith the minimum pump liquid level H that opens
Lmaxm;
B. utilize level switch to survey sewage level H in the current vacuum tank 8
Lt, the vacuum tightness V in the current vacuum tank 8 of vacuum pressure sensor 3 monitorings
Pt
C. after system brings into operation, at first judge monitoring sewage level H
1tWhether meet or exceed the minimum pump liquid level H that opens of sewage pump
LmaxmIf do not reach, be H
Lt＜H
Lmaxm, then sewage pump 10 keeps stopped status until liquid level reaches the minimum pump liquid level H that opens
LmaxmAfter enter again follow-up flow process;
If reach, be H
Lt〉=H
Lmaxm, then judge sewage level H
LtWhether meet or exceed the sewage pump 10 the highest pump liquid level H that open
LmaxIf: reach, be H
Lt〉=H
Lmax, then start sewage pump 10; If reached minimum open the pump liquid level but do not reach the highest and open the pump liquid level, be H
Lmaxm≤ H
Lt＜H
Lmax, then judge again vacuum tightness V
PtAverage True reciprocal of duty cycle 0.5 (V with system works
Pmaxt+ V
Pmint) relative size; If current vacuum tightness V
PtBeing lower than system's Average True reciprocal of duty cycle is V
Pt＜0.5 (V
Pmaxt+ V
Pmint), then start sewage pump 10, on the contrary (if current vacuum tightness V
PtBe lower than system's Average True reciprocal of duty cycle, be V
Pt＜0.5 (V
Pmaxt+ V
Pmint) mean this? please be clearly), then treat liquid level H
LtBe increased to the highest pump liquid level H that opens
LmaxOr vacuum tightness V
PtBe reduced to Average True reciprocal of duty cycle 0.5 (V
Pmaxt+ V
Pmint) below again sewage pump 10 is started; After the each startup of sewage pump, with sewage level H
LtBe reduced to sewage pump termination of pumping liquid level H
LminAfter, sewage pump is shut down.
Described step 4) may further comprise the steps:
A. utilize the vacuum tightness V in the current vacuum tank 8 of vacuum pressure sensor 3 monitorings
Pt:
B. after system brings into operation, at first with current vacuum tightness V
PtWith the vacuum pump 9 the highest pump vacuum tightness V that open
PminmMake comparisons, wherein V
Pminm=V
Pmaxt-x
Vp(V
Pmaxt-V
Pmint), x
VpFor setting coefficient, x
VpSpan 0.5＜x
Vp＜1; If current vacuum tightness V
PtBe higher than the highest pump vacuum tightness V that opens
Pminm, then vacuum pump 9 keeps stopped status until current vacuum tightness V
PtBe reduced to the highest pump vacuum tightness V that opens
PminmAfter enter again follow-up flow process; If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
Pminm, be V
Pt＜V
Pminm, then continue current vacuum tightness V
PtWith the vacuum pump 9 minimum pump vacuum tightness V that open
PminMake comparisons; If current vacuum tightness V
PtBe lower than the vacuum pump 9 minimum pump vacuum tightness V that open
Pmin, then start vacuum pump 9; If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
PminAnd be higher than the minimum pump vacuum tightness V that opens
Pminm, be V
Pmint≤ V
Pt＜V
Pminm, then judge again the duty of current sewage pump 10; If sewage pump 10 is in stopped status, then starts vacuum pump 9, otherwise then treat vacuum tightness V
PtBe reduced to the minimum pump vacuum tightness V that opens
PminmOr restart vacuum pump 9 after sewage pump 10 shutdown; After vacuum pump 9 starts, treat vacuum tightness V
PtBe increased to termination of pumping vacuum tightness V
PmaxRear shutdown.
A kind of control method of vacuum drainage pumping plant in conjunction with Fig. 1 to Fig. 5, may further comprise the steps:
1) utilizes described analysis module 5, preset the initial high limit V of system works vacuum tightness
Pmax0Be 60kPa and initial lower bound V
Pmin0Be 50kPa; Utilize gas meter 1 and sewage flowmeter 2 to monitor respectively the gas flow Q of vacuum pump 9 and sewage pump 10 discharges
gWith discharge of sewage Q
lUtilizing statistic period T of analysis module statistics is the gas volume V that is discharged by vacuum pump 9 and sewage pump 10 in 30 minutes
gWith sewage volume V
l, and then calculate the interior gas-water ratio K of this measurement period
tWherein,
I=g or l, K
t=V
g/ V
l, t is current time, the measurement period of T for setting.Be running integral method signal such as Fig. 2.
As shown in Figure 3, carry out the dynamic adjustments of working vacuum degree by the monitoring of gas-water ratio.Preset the lower bound gas-water ratio K of system works
MinBe 2 and default high limit gas-water ratio K
MaxBe 4; First with current gas-water ratio K
tWith default lower bound gas-water ratio K
MinMake comparisons, if K
t＜K
Min, then the explanation air mass flow that enters or discharge the vacuum drainage pumping plant is compared the discharge of sewage and has been lower than normal range K
Min～K
Max, information output apparatus sends information warning: " may there be impeded drainage in vacuum pipe ".Simultaneously, analysis module also can be according to gas-water ratio K
tValue, in real time at the initial high limit V of predetermined system working vacuum degree
Pmax0With initial lower bound V
Pmin0The basis on add respectively dynamic compensation amount (1-K
t/ K
Min) (V
Pmaxp-V
Pmax0), as the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintThe raising of working vacuum degree will make gas-water ratio K
tGet back to gradually normal range K
Min～K
MaxIn.Wherein, V
PmaxpThe final vacuum that can reach for the vacuum pump that configures.If K
t〉=K
Min, illustrate that then the amount of the air of the system that enters is enough carried sewage, the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintLimit V with the initial height of the system works vacuum tightness of presetting respectively
Pmax0With initial lower bound V
Pmin0Equate.Again with this gas-water ratio K
tWith default high limit gas-water ratio K
MaxMake comparisons.If K
t≤ K
Max, illustrate that then gas-water ratio is normal.If K
tK
Max, then the explanation air mass flow that enters or discharge Vacuum Pumps Station is compared the discharge of sewage and has been exceeded normal range, and information output apparatus sends information warning " may there be leakage in the vacuum sewage collection system ".
Be illustrated in figure 4 as sewage pump operation control flow schematic diagram.By the vacuum tightness V in the current vacuum tank 8 of vacuum pressure sensor 3 monitorings
PtSurvey respectively sewage level H in the vacuum tank 8 by the first level switch 4a, the second level switch 4b, the 3rd level switch 4c
LtWhether met or exceeded termination of pumping liquid level H
Lmin, the minimum pump liquid level H that opens
LmaxmThe highest pump liquid level H that opens
1maxAfter system brings into operation, at first by the second level switch 4b monitoring sewage level H
LtWhether meet or exceed sewage pump 10 minimum unlatching liquid level H
LmaxmIf not reaching is H
Lt＜H
Lmaxm, then sewage pump 10 keeps stopped status until liquid level H
LtReach the minimum pump liquid level H that opens
LmaxmAfter enter again follow-up flow process.Be H if reached
Lt〉=H
Lmaxm, then by the 3rd level switch 4c monitoring sewage level H
LtWhether meet or exceed the highest pump liquid level H that opens of sewage pump
LmaxBe H if reached
Lt〉=H
Lmax, then open sewage pump 10.Minimum to open the pump liquid level but do not reach the highest pump liquid level that opens be H if reached
Lmaxm≤ H
Lt＜H
Lmax, then judge again vacuum tightness V
PtAverage True reciprocal of duty cycle 0.5 (V with system works
Pmaxt+ V
Pmint) relative size.If current vacuum tightness V
PtBeing lower than system's Average True reciprocal of duty cycle is V
Pt＜0.5 (V
Pmaxt+ V
Pmint), then start sewage pump 10, otherwise then treat liquid level H
LtBe increased to the highest pump liquid level H that opens
1maxOr vacuum tightness V
PtBe reduced to Average True reciprocal of duty cycle 0.5 (V
Pmaxt+ V
Pmint) below will start sewage pump 10 again.Behind sewage pump 10 each the startups, must treat sewage level H
LtBe reduced to sewage pump termination of pumping liquid level H
LminThe time, sending signal by the first level switch 4a, sewage pump 10 is shut down.
Be illustrated in figure 5 as vacuum pump operation control flow schematic diagram.By the vacuum tightness V in the current vacuum tank 8 of vacuum pressure sensor 3 monitorings
PtAfter system brings into operation, at first with current vacuum tightness V
PtWith the highest pump vacuum tightness V that opens of vacuum pump
PminmMake comparisons.Wherein, V
Pminm=V
Pmaxt-x
Vp(V
Pmaxt-V
Pmint), x
VpFor setting coefficient, such as 0.9.If current vacuum tightness V
PtBe higher than the highest pump vacuum tightness V that opens
Pminm, then vacuum pump 9 keeps stopped status until current vacuum tightness V
PtBe reduced to the highest pump vacuum tightness V that opens
PminmAfter enter again follow-up flow process.If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
PminmBe V
Pt＜V
Pminm, then continue current vacuum tightness V
PtWith the minimum startup vacuum tightness of vacuum pump V
PminMake comparisons.If current vacuum tightness V
PtBe lower than the minimum startup vacuum tightness of vacuum pump V
Pmin, then start vacuum pump 9.If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
PminAnd be higher than the minimum pump vacuum tightness V that opens
PminmBe V
Pmint≤ V
Pt＜V
Pminm, then judge again the duty of current sewage pump.If sewage pump 10 is in stopped status, then starts vacuum pump 9, otherwise then treat vacuum tightness V
PtBe reduced to the minimum pump vacuum tightness V that opens
PminmOr restart vacuum pump 9 after sewage pump 10 shutdown.After vacuum pump 9 starts, treat vacuum tightness V
PtBe increased to termination of pumping vacuum tightness V
PmaxRear shutdown.Other does not repeat them here with reference to embodiment 1.
Although above-mentioned by reference to the accompanying drawings to the invention embodiment be described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (10)
1. the control device of a vacuum drainage pumping plant, it is characterized in that, comprise signal input module, analysis module, execution module, information output apparatus, described analysis module is connected with signal input module, execution module, information output apparatus respectively, analysis module be used for to input signal make analyze judge, to the operating instruction of execution module transmission vacuum pump and sewage pump, to information output apparatus transmission system parameters and information warning; Described execution module is connected with power supply, vacuum pump and sewage pump respectively, is used for accepting analysis module and sends instruction and control vacuum pump and the operation of sewage pump; Described information output apparatus is connected with analysis module, is used for external display system parameter and sends information warning.
2. the control device of vacuum drainage pumping plant as claimed in claim 1, it is characterized in that, described signal input module comprises gas meter, sewage flowmeter, vacuum degree measuring equipment, the first level switch, the second level switch, the 3rd level switch, described gas meter is located on the pipeline of vacuum pump outlet, described sewage flowmeter is located on the pipeline of sewage pump outlet, the measure portion of vacuum degree measuring equipment is positioned at the vacuum tank inner top, the first level switch, the second level switch, the probe portion of the 3rd level switch is positioned at vacuum tank, and signal input module is connected with analysis module by signal cable.
3. the control device of vacuum drainage pumping plant as claimed in claim 1 is characterized in that, described execution module comprises contactor and contact thereof; Described contactor is connected with the analysis module circuit and by analysis module control, and the contact of described contactor is connected in the loop of power supply and vacuum pump, sewage pump, and the Realization analysis module is to the control of described vacuum pump and described sewage pump.
4. the control device of vacuum drainage pumping plant as claimed in claim 1 is characterized in that, described analysis module is single-chip microcomputer, industrial computer or programmable logic controller (PLC); Described information output apparatus comprises display screen, pilot lamp, hummer, printer, disk, display screen is used for showing text and numerical information, pilot lamp and described hummer are for the fast demonstration of running status and information warning, printer and described disk are used for output and the storage of information, display screen, printer and disk are connected with analysis module by data cable, and pilot lamp and hummer are connected with analysis module by power lead.
5. utilize the control method of the control device of the described vacuum drainage pumping plant of claim 1 to 4 any one, it is characterized in that, may further comprise the steps:
1) utilizes described analysis module, to the gas-water ratio K in the measurement period
tCarry out on-line measurement, reach statistical monitoring, described gas-water ratio K
tFor: the ratio of the gas flow of vacuum pump and the discharge of sewage of sewage pump;
2) according to different gas-water ratio K
t, the working vacuum degree is made corresponding control operation, the dynamic compensation of realizing vacuum tightness and the automatic adjusting of gas-water ratio;
3) to vacuum tightness V in the vacuum tank
Pt, sewage level H
LtAnd the monitoring of sewage pump running status, operation is made corresponding operation, is carried out segmentation control to vacuum pump and sewage pump, simultaneously display system parameter and send information warning;
4) according to different vacuum tightness V
Pt, and the sewage pump duty vacuum pump and sewage pump are made corresponding control operation.
6. the control method of the control device of vacuum drainage pumping plant as claimed in claim 5 is characterized in that, described step 1) comprises the steps:
A. preset the initial high limit V of system works vacuum tightness
Pmax0With initial lower bound V
Pmin0
B. utilize gas meter and sewage flowmeter to monitor respectively the gas flow Q of vacuum pump and sewage pump discharge
gWith discharge of sewage Q
l
C. utilize the gas volume V that is discharged by vacuum pump and sewage pump in statistic period T of analysis module statistics
gWith sewage volume V
l, and then calculate the interior gas-water ratio K of this measurement period
t
7. the control method of the control device of vacuum drainage pumping plant as claimed in claim 6 is characterized in that, utilizes following formula to obtain gas-water ratio K
t: K
t=V
g/ V
l,
Wherein,
T is current time, t
xBe integration variable, the measurement period of T for setting.
8. the control method of the control device of vacuum drainage pumping plant as claimed in claim 5 is characterized in that, described step 2) may further comprise the steps:
A. preset lower bound gas-water ratio K
Min, high limit gas-water ratio K
Max
B. first with gas-water ratio K
tWith default lower bound gas-water ratio K
MinMake comparisons, if K
t＜K
Min, the air mass flow that then enters or discharge Vacuum Pumps Station is compared the discharge of sewage and is lower than normal range K
Min～K
Max, information output apparatus sends information warning, and analysis module is according to gas-water ratio K simultaneously
tValue, in real time at the initial high limit V of predetermined system working vacuum degree
Pmax0With initial lower bound V
Pmin0The basis on add respectively compensation rate (1-K
t/ K
Min) (V
Pmaxp-V
Pmax0), as the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
Pmint, make gas-water ratio K
tGet back to gradually normal range K
Min～K
MaxIn, wherein, V
PmaxpThe final vacuum that can reach for the vacuum pump that configures; If K
t〉=K
Min, the amount that enters the air of system is enough carried sewage, the high limit V of system's real work vacuum tightness
PmaxtWith lower bound V
PmintLimit V with the initial height of the system works vacuum tightness of presetting respectively
Pmax0With initial lower bound V
Pmin0Equate;
C. again with this gas-water ratio K
tWith default high limit gas-water ratio K
MaxMake comparisons, if K
t≤ K
Max, gas-water ratio is normal; If K
tK
Max, the air mass flow that then enters or discharge the vacuum drainage pumping plant is compared the discharge of sewage and has been exceeded normal range, and information output apparatus sends information warning.
9. the control method of the control device of vacuum drainage pumping plant as claimed in claim 5 is characterized in that, described step 3) may further comprise the steps:
A. preset the termination of pumping liquid level H of sewage pump
Lmin, the highest pump liquid level H that opens
LmaxWith the minimum pump liquid level H that opens
1maxm
B. utilize level switch to survey the interior sewage level H of current vacuum tank
Lt, vacuum degree measuring equipment is monitored the vacuum tightness V in the current vacuum tank
Pt
C. after system brings into operation, at first judge monitoring sewage level H
LtWhether meet or exceed the minimum pump liquid level H that opens of sewage pump
LmaxmIf do not reach, be H
Lt＜H
Lmaxm, then sewage pump keeps stopped status until liquid level reaches the minimum pump liquid level H that opens
LmaxmAfter enter again follow-up flow process; If reach, be H
Lt〉=H
1maxm, then judge sewage level H
1tWhether meet or exceed the highest pump liquid level H that opens of sewage pump
LmaxIf: reach, be H
Lt〉=H
1max, then start sewage pump; If reached minimum open the pump liquid level but do not reach the highest and open the pump liquid level, be H
Lmaxm≤ H
Lt＜H
Lmax, then judge again vacuum tightness V
PtAverage True reciprocal of duty cycle 0.5 (V with system works
Pmaxt+ V
Pmint) relative size; If current vacuum tightness V
PtBeing lower than system's Average True reciprocal of duty cycle is V
Pt＜0.5 (V
Pmaxt+ V
Pmint), then start sewage pump, otherwise then treat liquid level H
LtBe increased to the highest pump liquid level H that opens
1maxOr vacuum tightness V
PtBe reduced to Average True reciprocal of duty cycle 0.5 (V
Pmaxt+ V
Pmint) below again sewage pump is started; After the each startup of sewage pump, with sewage level H
1tBe reduced to sewage pump termination of pumping liquid level H
LminAfter, sewage pump is shut down.
10. the control method of the control device of vacuum drainage pumping plant as claimed in claim 5 is characterized in that, described step 4) may further comprise the steps:
Utilize vacuum degree measuring equipment to monitor the interior vacuum tightness V of current vacuum tank
Pt: after system brings into operation, at first with current vacuum tightness V
PtWith the highest pump vacuum tightness V that opens of vacuum pump
PminmMake comparisons, wherein V
Pminm=V
Pmaxt-x
Vp(V
Pmaxt-V
Pmint), x
VpFor setting coefficient, x
VpSpan 0.5＜x
Vp＜1;
If current vacuum tightness V
PtBe higher than the highest pump vacuum tightness V that opens
Pminm, then vacuum pump keeps stopped status until current vacuum tightness V
PtBe reduced to the highest pump vacuum tightness V that opens
PminmAfter enter again follow-up flow process;
If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
Pminm, be V
Pt＜V
Pminm, then continue current vacuum tightness V
PtWith the minimum pump vacuum tightness V that opens of vacuum pump
PminMake comparisons;
If current vacuum tightness V
PtBe lower than the minimum pump vacuum tightness V that opens of vacuum pump
Pmin, then start vacuum pump;
If current vacuum tightness V
PtBe lower than the highest pump vacuum tightness V that opens
PminAnd be higher than the minimum pump vacuum tightness V that opens
Pminm, be V
Pmint≤ V
Pt＜V
Pminm, then judge again the duty of current sewage pump;
If sewage pump is in stopped status, then starts vacuum pump, otherwise then treat vacuum tightness V
PtBe reduced to the minimum pump vacuum tightness V that opens
PminmOr restart vacuum pump after the sewage pump shutdown; Vacuum pump is treated vacuum tightness V after starting
PtBe increased to termination of pumping vacuum tightness V
PmaxRear shutdown.
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|---|---|---|---|
| CN201210417997.1A CN102955469B (en) | 2012-10-26 | 2012-10-26 | Control device and control method of vacuum drainage pumping station |
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| CN112944219A (en) * | 2020-12-31 | 2021-06-11 | 深圳市福田区南科大量子技术与工程研究院 | Gas control box |
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|---|---|
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Address after: 250101 Century Avenue, Ji'nan high tech Zone, Shandong, No. 3666 Patentee after: SHANDONG CRRC HUATENG ENVIRONMENT Co.,Ltd. Address before: Room 250101 A401 of Shandong province science and Technology Park of Ji'nan high tech Zone Shun Road No. 750 University Patentee before: Shandong Huateng Environmental Protection Automation Co.,Ltd. |
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