CN114933403B - Control method of pollution treatment equipment based on water body sludge analysis - Google Patents
Control method of pollution treatment equipment based on water body sludge analysis Download PDFInfo
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- CN114933403B CN114933403B CN202210873981.5A CN202210873981A CN114933403B CN 114933403 B CN114933403 B CN 114933403B CN 202210873981 A CN202210873981 A CN 202210873981A CN 114933403 B CN114933403 B CN 114933403B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to a control method of pollution treatment equipment based on water body sludge analysis, which is used for obtaining the filter pressing power of the equipment and the turbidity degree of the filtered water body to obtain the sludge discharge index of the water body in the filter pressing process; acquiring pressure data of the mud cake in a filter pressing process, and determining the complexity of the mud cake, wherein the complexity represents whether foreign matter resistance exists in the mud cake according to the pressure data, and when the pressure data is greater than a set pressure value, floccules exist in the mud cake; according to the complexity and the sludge discharge index, calculating the extrusion index of the sludge in the filter pressing process; and judging the change degree of the mud discharging index at the moment before and after, and when the change degree is smaller than a set value and the mud discharging index is larger than a set threshold value, adjusting the filter pressing power of the equipment according to the extrusion index to realize the intelligent control of the equipment. Namely, the scheme of the invention can be used for flexibly and firmly analyzing the index which can influence the equipment to filter-press the water body in the river, thereby controlling the equipment and effectively carrying out the filter-press of the sludge.
Description
Technical Field
The invention relates to the field of river and lake ecological dredging, in particular to a control method of pollution treatment equipment based on water body sludge analysis.
Background
The river bed height can be effectively reduced for the dredging work of the river, and the water body sludge can be removed; wherein water mud need carry out the filter-pressing through the plate and frame filter press, just can carry out effectual transportation, consequently carry out the analysis to the mud that the plate and frame machine was handled and can know the pollution degree of current water. Because in the filter-pressing process of the plate-and-frame filter press, the pressure of each filter-pressing is difficult to determine, and the pressure is not linearly changed, namely the pressure continuously rises along with the increase of the particle density, the pressure needs to be effectively adjusted according to actual conditions, so that the filter press can work more effectively.
Disclosure of Invention
In order to achieve the above purpose, the present invention aims to provide a method for controlling a pollution treatment device based on water body sludge analysis, which is used for solving the problem that parameter control cannot be effectively performed in the operation process of the pollution treatment device.
The invention provides a control method of pollution treatment equipment based on water body sludge analysis, which comprises the following steps:
acquiring the filter pressing power of equipment and the turbidity degree of the filtered water body;
obtaining a mud discharging index of the water body in the filter pressing process based on the filter pressing power and the turbidity degree;
acquiring pressure data of the mud cake in a filter pressing process, and determining the complexity of the mud cake, wherein the complexity represents whether foreign matter resistance exists in the mud cake according to the pressure data, and when the pressure data is greater than a set pressure value, floccules exist in the mud cake;
calculating the extrusion index of the sludge in the filter pressing process according to the complexity and the sludge discharge index;
and judging the change degree of the mud discharging index at the moment before and after, and when the change degree is smaller than a set value and the mud discharging index is larger than a set threshold value, adjusting the filter pressing power of the equipment according to the extrusion index to realize the intelligent control of the equipment.
Preferably, when the change degree is larger than the set value, an alarm is given, and the equipment stops working.
Preferably, the turbidity degree is obtained by collecting the turbidity degrees at different moments in a set time period, calculating turbidity mean values corresponding to the set time period, then averagely grouping the turbidity degrees according to a time sequence to obtain a first mean value corresponding to the first group and a second mean value corresponding to the second group, and obtaining the turbidity degree according to the product of the difference value of the first mean value and the second mean value and the turbidity mean value.
Preferably, the filter-pressing power is the power at different moments in a set time period through the acquisition equipment, and the filter-pressing power of the set time period is obtained by weighting according to different powers.
Preferably, the mud discharging index is the ratio of the turbidity degree to the filter pressing power.
Preferably, the extrusion index is:
wherein, U is the turbidity index of the water body, and X is the complexity of the mud cake.
Preferably, the method further comprises processing the extrusion index to obtain an adjustment coefficient, where the adjustment coefficient is used to adjust the power of the equipment, and the adjustment coefficient is:
wherein R is the extrusion index of the equipment.
The invention has the following beneficial effects:
according to the scheme of the invention, the filter pressing power of the equipment and the turbidity degree of the filtered water body are obtained; obtaining a mud discharging index of the water body in the filter pressing process based on the filter pressing power and the turbidity degree; acquiring pressure data of mud cakes in a filter pressing process, and determining the complexity of the mud cakes, wherein the complexity is the representation of whether foreign matter resistance exists in the mud cakes according to the pressure data, and when the pressure data is greater than a set pressure value, floccules exist in the mud cakes; calculating the extrusion index of the sludge in the filter pressing process according to the complexity and the sludge discharge index; and judging the change degree of the mud discharging index at the moment before and after, and when the change degree is smaller than a set value and the mud discharging index is larger than a set threshold value, adjusting the filter pressing power of the equipment according to the extrusion index to realize the intelligent control of the equipment. The invention can analyze the index of the water body in the river which possibly influences the filter pressing of the equipment according to the mud discharging index and the complexity of the mud cakes, thereby controlling the equipment and effectively carrying out the filter pressing of the mud.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the method of the present invention for controlling a pollution control facility based on analysis of water body sludge.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, characteristics and effects thereof according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention aims at specifically controlling pollution treatment equipment for river water treatment based on water body sludge analysis in river dredging work.
Specifically, the pollution treatment equipment is specifically described by taking a plate-and-frame filter press as an example, wherein please refer to fig. 1, an embodiment of the control method of the pollution treatment equipment based on water body sludge analysis of the present invention includes the following steps:
step 1, obtaining the filter pressing power of a filter press and the turbidity degree of the filtered water body.
The filter-pressing power in the embodiment is obtained by collecting the power of the filter press at different moments in a set time period and weighting according to different powers. When the filter pressing process starts, the current and the voltage of the plate-and-frame filter press are monitored in real time, and the current power W is obtained.
Specifically, in each filter pressing process, for a set time period, acquiring 4 pieces of power data in real time according to the same time interval, storing the power data in an array form, performing weighting processing on the current filter pressing power, and setting a weighting parameter to comprehensively judge the current filter pressing power; because the resistance of the filter press is the minimum when the filter press is just started to filter, the power is the minimum, and the power is increased along with the sludge being compacted more and more tightly.
Weighting the acquired power information according to a time sequence to obtain power which is the filter-pressing power corresponding to the set time period
(ii) a All the above informationThe data obtained are collected in one filter pressing cycle of the plate frame machine and are only used in one filter pressing cycle.
The turbidity degree in the embodiment is obtained by collecting the turbidity degrees at different moments in a set time period, calculating the turbidity mean values corresponding to the set time period, then averagely grouping the turbidity degrees according to a time sequence to obtain a first mean value corresponding to the first group and a second mean value corresponding to the second group, and obtaining the turbidity degree according to the product of the difference value of the first mean value and the second mean value and the turbidity mean value. Specifically, the average turbidity was first calculated
Then, the turbidity D is grouped according to time sequence by using a dichotomy, and the turbidity at the initial stage of filter pressing is obtained after averaging
Turbidity at the later stage of press filtration
The turbidity level was obtained.
The turbidity is a liquid value of the water outlet measured by a turbidity meter arranged on the filter press, wherein the turbidity meter is an infrared detection turbidity meter, namely, the infrared turbidity meter is based on 880nm detection and is positioned on the side edge of the water outlet, a detection port points to the other side, when sewage flows through the infrared detection turbidity meter, turbid water can shield the infrared detection light to a certain extent, and the turbidity degree can be read through the voltage; specific reading methods and filtering methods are well known and will not be explained in the present invention.
It should be noted that, when the filter press presses the sludge to squeeze out water, the detection is started, the detection frequency is 50ms, the acquired data is directly averaged to obtain the current turbidity D, and the processed data is stored in an array form
。
And 2, obtaining a mud discharging index of the water body in the filter pressing process based on the filter pressing power and the turbidity degree.
The mud discharging index in the embodiment is the ratio of the turbidity degree to the filter pressing power:
wherein the content of the first and second substances,
represents the average turbidity of the drained water,
is the turbidity at the initial stage of filter pressing,
w is the turbidity at the later stage of filter pressing and is the power of the filter pressing.
In the above formula, the average turbidity is corrected by the turbidity change degree, so Un represents the sludge output per unit power at this time of filter pressing, and the range is [0, + ∞ ].
In the process of primary filter pressing, the turbidity of sewage is constantly changed, along with the filter pressing of the filter press, the turbidity degree of a water body at the end stage of the filter pressing is high from experience, and the turbidity degree under the unit power needs to be considered by the design evaluation standard because the pressure and the power are also changed.
And 3, collecting pressure data of the mud cake in the filter pressing process, and determining the complexity of the mud cake, wherein the complexity represents whether foreign matter resistance exists in the mud cake according to the pressure data, and when the pressure data is greater than a set pressure value, floccules exist in the mud cake.
The pressure data in this example was collected by using automated equipment to move a pressure probe at a constant rate through the filter cake, and collecting the pressure F returned by the probe during this process.
Specifically, pressure data acquired in a corresponding filter pressing process within a set time period are accumulated to obtain total pressure data in the filter pressing process, and the complexity of a mud cake corresponding to the current pressure data is determined according to the size of the total pressure data and the standard complexity level of the mud cake.
The standard complexity level of the mud cake in this embodiment is obtained by setting a plurality of sets of experiments and according to content indexes of different floccules, corresponding pressure data is obtained, and then content indexes of different floccules corresponding to different pressure data, that is, standard complexity, are determined, and are used for determining the complexity level of the mud cake according to the pressure data in the subsequent process.
It should be noted that floe exists in the sludge of the river, and the floe is mostly generated by algae, numerous microorganisms in the water body are continuously propagated, the generated floe is remained in the filter cake along with the extrusion of the filter press, and the floe can well improve the physical structure of the filter cake, so the sampling is carried out through a pressure test. The degree that the floccules influence the mud cakes can be reflected through the acquired pressure data, and meanwhile, the compaction degree of the mud cakes can also be reflected through the pressure, so that the index of the residual sludge of the mud cakes can be judged according to the sludge discharge index under unit power, and the state of the mud cakes subjected to pressure filtration by the filter press can be reflected.
When one filter pressing is finished, 80% of sludge moisture can be squeezed, so that the filter cake is soft in texture and has certain fluid properties. Because speed is certain, if when the probe sweeps the flocculus, the pressure value that the probe returns can grow, when the probe knocks over the stone and remaining rubbish, the pressure value that returns can be very big, consequently the too big part of pressure of the pressure of record need filtering, that is to say, only study the influence of the existence of flocculus to the pressure filter in the filter pressing process in this embodiment.
The set pressure value is the pressure data corresponding to the collected mud cake without floccules.
And 4, calculating the extrusion index of the sludge in the filter pressing process according to the complexity and the sludge discharge index.
Wherein, the extrusion index is as follows:
wherein, U is the turbidity index of the water body, and X is the complexity of the mud cake.
In the formula, R is a resistance index in the sludge. The resistance under the above conditions was evaluated once, and it was indicated as the magnitude of the resistance generated under the plate-and-frame press conditions. Wherein the value range of R is [0, + ∞ ], and the larger the value is, the more flocculent is, the larger the resistance in the filter pressing process is, and the extrusion index is influenced.
It should be noted that, in the following description,
expressed as the residual degree of silt in the plate frame machine, X is the index of floccule,
reflecting the increasing effect of pressure along with the increase of the content of the floccule, the larger the resistance R is, the larger the motor power W is needed to achieve the standard dewatering amount of the mud cake.
And 5, judging the change degree of the mud discharging index at the moment before and after, and when the change degree is smaller than a set value and the mud discharging index is larger than a set threshold value, adjusting the filter pressing power of the filter press according to the extrusion index to realize the intelligent control of the filter press.
The change degree of the mud discharging index in the embodiment is the difference value of the current set time and the mud discharging index of the set time in the previous period, namely when the change degree is greater than a set value, an alarm is given, and the filter press stops working; and when the change degree is smaller than the set value and the mud discharging index is larger than the set threshold value, adjusting the filter pressing power of the filter press based on the extrusion index calculated in the step 4.
Wherein, the adjustment of the filter pressing power in the filter press is as follows:
and processing the extrusion index to obtain an adjusting coefficient, wherein the adjusting coefficient is used for adjusting the power of the filter press.
The adjusting coefficient is as follows:
wherein R is the extrusion index of the filter press.
Wherein the set value is a standard value of the water quality of the filtered liquid.
In the above, when the mud discharge index U slowly increases to exceed the set threshold D A Designing an adjusting function, changing the extrusion power and controlling the amount of leaked sludge.
Further, when the mud discharge index U under the unit power reaches the set threshold D A And the turbidity D of the discharged water continuously rises, and the early warning is carried out on the treatment of the upper reaches of the industrial chain to inform that the water and soil loss is aggravated. Meanwhile, higher requirements are put forward on the harmless treatment process of the mud cakes at the downstream of the industrial chain. The mud discharging index U under the unit power can show the mud discharging amount of the plate frame machine under the unit power, when the two former and later numerical values are suddenly changed, the filter cloth damage is represented, early warning is needed, the work is stopped, and the filter cloth is replaced.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (3)
1. A control method of pollution treatment equipment based on water body sludge analysis is characterized by comprising the following steps:
acquiring the filter pressing power of equipment and the turbidity degree of the filtered water body;
obtaining a mud discharging index of the water body in the filter pressing process based on the filter pressing power and the turbidity degree;
acquiring pressure data of mud cakes in a filter pressing process, and determining the complexity of the mud cakes, wherein the complexity is the representation of whether foreign matter resistance exists in the mud cakes according to the pressure data, and when the pressure data is greater than a set pressure value, floccules exist in the mud cakes; accumulating the pressure data acquired in the corresponding filter-pressing process within a set time period to obtain total pressure data in the filter-pressing process, and determining the complexity of the mud cake corresponding to the current pressure data according to the size of the total pressure data and the standard complexity level of the mud cake;
calculating the extrusion index of the sludge in the filter pressing process according to the complexity and the sludge discharge index;
judging the change degree of the sludge discharge index at the moment before and after, and when the change degree is smaller than a set value and the sludge discharge index is larger than a set threshold value, adjusting the filter pressing power of the equipment according to the extrusion index to realize the intelligent control of the equipment;
the filter-pressing power is the power at different moments in a set time period through the acquisition equipment, and the filter-pressing power of the set time period is obtained by weighting according to different powers;
the mud discharging index is the ratio of the turbidity degree to the filter pressing power;
the extrusion indexes are as follows:
wherein U is the turbidity index of the water body, and X is the complexity of the mud cake;
the method further comprises the step of processing the extrusion index to obtain an adjusting coefficient, wherein the adjusting coefficient is used for adjusting the power of the equipment and is as follows:
wherein R is the extrusion index of the equipment.
2. The method for controlling the pollution treatment equipment based on the analysis of the sludge in the water body according to claim 1, wherein when the change degree is greater than a set value, an alarm is given, and the equipment stops working.
3. The method for controlling pollution treatment equipment based on water body sludge analysis according to claim 1, wherein the turbidity degree is obtained by collecting turbidity degrees at different moments in a set time period, calculating turbidity mean values corresponding to the set time period, then averagely grouping the turbidity degrees according to a time sequence to obtain a first mean value corresponding to a first group and a second mean value corresponding to a second group, and obtaining the turbidity degree according to a product of a difference value of the first mean value and the second mean value and the turbidity mean value.
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| CA2629593A1 (en) * | 2008-04-11 | 2009-10-11 | James Michael Dunbar | Feedback control scheme for optimizing dewatering processes |
| CN106055915A (en) * | 2016-06-29 | 2016-10-26 | 深圳市铁汉生态环境股份有限公司 | Method for evaluating comprehensive performance of sludge dewatering conditioner |
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