CN113185087A - Sludge treatment method and system - Google Patents
Sludge treatment method and system Download PDFInfo
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- CN113185087A CN113185087A CN202110551369.1A CN202110551369A CN113185087A CN 113185087 A CN113185087 A CN 113185087A CN 202110551369 A CN202110551369 A CN 202110551369A CN 113185087 A CN113185087 A CN 113185087A
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- 239000010802 sludge Substances 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000003814 drug Substances 0.000 claims abstract description 66
- 238000005303 weighing Methods 0.000 claims abstract description 50
- 238000003756 stirring Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 7
- 239000013585 weight reducing agent Substances 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 11
- 239000000126 substance Substances 0.000 description 7
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The application discloses a sludge treatment method and a sludge treatment system, which are used for solving the technical problems of high dispensing difficulty, high consumed labor cost and low treatment precision of the existing sludge treatment method. The method comprises the following steps: weighing the sludge dropped discontinuously by a belt scale; based on a PLC (programmable logic controller), reading the weighing data of the sludge according to a preset time interval, and calculating the average value of the weighing data in a preset time period; determining an output signal of the PLC for the sludge within a preset time period according to the average value; according to the output signals, the output flow rates of the medicament pump and the submersible pump are respectively controlled so as to adjust the ratio between the medicament and the water. By the method, the proportion between the medicament and the water can be adjusted in time aiming at the massive sludge with different weights, the labor cost is saved, and the dispensing efficiency is high and more accurate.
Description
Technical Field
The application relates to the technical field of sludge treatment, in particular to a sludge treatment method and system.
Background
Untreated sludge has a high water content, and therefore, the existing sludge treatment systems need to dehydrate the sludge when treating the sludge. In the subsequent sludge dewatering process, the sludge is firstly required to be conditioned for dosage and water distribution, the chemical agent, the water and the sludge are kept in a certain proportion by adding the chemical agent and a small amount of water into the sludge, and then the sludge is stirred and conveyed in time to meet the subsequent dewatering and filter pressing requirements.
The current dirty workshop of taking off is stirred the cage through the shaftless and is carried mud, but because the shaftless stirs the cage frequency inconsistent when exporting mud, leads to mud to be the discontinuity when dropping, and every lump in mud's size differs, and the weight difference is great. The inhomogeneous feed has brought very big degree of difficulty for carrying out stable dispensing, water distribution work in the later stage mud is carried, and the proportion of water and medicament all needs artifical real-time adjustment, does not have regularity, and the operation difficulty consumes the manpower. Moreover, the ratio of the chemical to the water cannot be accurately controlled by manual operation, so that the chemical is easily wasted, or the dehydration effect of the sludge cannot meet the requirement due to too little chemical.
Disclosure of Invention
The embodiment of the application provides a sludge treatment method and a sludge treatment system, which are used for solving the technical problems of high dispensing difficulty, high consumed labor cost and low treatment precision of the existing sludge treatment method.
In one aspect, an embodiment of the present application provides a sludge treatment method, including: weighing the sludge dropped discontinuously by a belt scale; based on a PLC (programmable logic controller), reading the weighing data of the sludge according to a preset time interval, and calculating the average value of the weighing data in a preset time period; determining an output signal of the PLC controller for the sludge in the preset time period according to the average value; and respectively controlling the output flow of the medicament pump and the submersible pump according to the output signals so as to adjust the ratio between the medicament and the water.
In one implementation manner of the present application, before determining, according to the average value, an output signal of the PLC controller for the sludge within the preset time period, the method further includes: determining a plurality of subsection intervals corresponding to the sludge with different weights according to the medicament and water required by the sludge with different weights; and determining output signals of the PLC corresponding to the subsection intervals so as to control the output flow of the medicament pump and the submersible pump according to the output signals.
In one implementation of the present application, the method further comprises: according to the increasing relation among the plurality of sectional intervals, corresponding gears are sequentially distributed to the sectional intervals according to the increasing order of the sizes; wherein, each gear corresponds to different output signals respectively.
In an implementation manner of the present application, determining, according to the average value, an output signal of the PLC controller for the sludge within the preset time period specifically includes: determining a segmentation interval corresponding to the average value; and according to the subsection interval, determining an output signal of the PLC controller aiming at the sludge in the preset time period.
In one implementation manner of the present application, the belt weigher and the PLC controller have a 485 communication function; reading the weighing data of the sludge according to a preset time interval, and calculating the average value of the weighing data in a preset time period, wherein the method specifically comprises the following steps: based on the PLC, reading the weighing data of the belt scale through the 485 communication function according to a preset time interval; and determining the weighing data which are read for a plurality of times in a preset time period, and calculating the average value of the weighing data corresponding to the preset time period.
In an implementation manner of the present application, the output flow rates of the medicament pump and the submersible pump are respectively controlled according to the output signal, and specifically include: determining the gears of a medicament pump frequency converter and a submersible pump frequency converter according to the output signals; and according to the gears, determining the output frequencies corresponding to the medicament pump frequency converter and the submersible pump frequency converter respectively, and adjusting the output flow rates of the medicament pump and the submersible pump.
In one implementation of the present application, the method further comprises: determining a plurality of times of weighing data read in a preset time period; calculating the weight reduction speed of the sludge according to the difference value between the weighing data of the times; taking the weight reduction speed as the water loss speed of the sludge, and determining the corresponding water content of the sludge according to the water loss speed; and adjusting the gear corresponding to the determined output signal according to the water content.
In one implementation of the present application, the method further comprises: measuring resistance of each part of the sludge based on a resistance sensor, and detecting the uniformity of the sludge according to the resistance; aiming at different uniformity, the stirring power of the double-shaft stirrer is adjusted.
In one implementation of the present application, the method further comprises: detecting the water content of the dewatered sludge; if the water content does not reach the standard value, carrying out segmentation processing on the plurality of segmented intervals again according to the difference value between the water content and the standard value to obtain a plurality of modified segmented intervals; and adjusting the corresponding output signals and the corresponding gears according to the plurality of changed segment intervals.
On the other hand, the embodiment of this application still provides a sludge treatment system, and the system includes: the belt weigher is used for weighing and conveying the sludge; the PLC is used for reading the weighing data of the sludge according to a preset time interval, calculating the average value of the weighing data in a preset time period and outputting a corresponding output signal; a medicament pump for controlling the output flow of medicament; the submersible pump is used for controlling the output flow of water; the double-shaft stirrer is used for stirring the sludge, the medicament and the water; and the resistance sensor is used for detecting the uniformity of the sludge so as to adjust the stirring power of the double-shaft stirrer according to the uniformity.
The sludge treatment method and the sludge treatment system provided by the embodiment of the application at least have the following beneficial effects:
the weight of the sludge is read in real time through communication among the PLC, the belt scale, the medicament pump and the submersible pump, and the output flow of the medicament pump and the submersible pump is adjusted according to the weight of the sludge read in a preset time period, so that automatic dispensing and water distribution in the sludge treatment process are realized, and the labor cost is reduced;
dividing the weight of the sludge into a plurality of sectional intervals according to the medicament and water required by treating the sludge with different weights, and outputting different output signals aiming at the sectional intervals so as to adjust the medicament and the water aiming at the sludge with different weights in time, thereby realizing accurate and timely dispensing of solids;
the water content of the sludge is slightly reduced in the transportation process, and the gears of the medicament pump and the submersible pump which are arranged under the default water content are adjusted by detecting the actual water content of the sludge, so that the accuracy of the ratio of the medicament to the water is further improved, and the waste is prevented;
detecting the water content of the sludge after the sludge is dehydrated, and adjusting a plurality of pre-divided segmented intervals and corresponding output signals and gears according to the water content, so that the segmented intervals are divided more reasonably, and the accuracy of dispensing and water distribution is improved;
according to the corresponding stirring dynamics of the degree of consistency adjustment of mud, ensure that every piece of mud can both stir abundant, avoid influencing dewatering effect because of mud self is inhomogeneous.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of a sludge treatment method provided in the embodiments of the present application;
FIG. 2 is a schematic diagram of an analysis of the average weighing data of sludge according to the embodiment of the present application;
fig. 3 is a schematic structural diagram of a sludge treatment system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a sludge treatment method and a sludge treatment system, the weight of sludge falling onto a belt scale is read in time, the average value of the weight of the sludge in a preset time period is calculated, and therefore the proportion of a medicament to water is adjusted according to the difference of the average values, and the technical problems that the existing sludge treatment method is high in dispensing difficulty, high in consumed labor cost and low in treatment precision are solved.
The technical solutions proposed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a sludge treatment method according to an embodiment of the present disclosure. As shown in fig. 1, a sludge treatment method provided in the embodiment of the present application mainly includes the following steps:
s101, weighing the discontinuously dropped sludge through a belt scale.
Mud is solid-like for flowing, consequently when weighing on carrying it to the belt weigher, mud can drop by one, and every mud is not of uniform size, and weight is uneven. Be equipped with weighing sensor on the belt weigher, can weigh the cubic mud of intermittent type process to in carrying mud to the biax mixer.
S102, reading the weighing data of the sludge according to a preset time interval based on a PLC (programmable logic controller), and calculating the average value of the weighing data in a preset time period.
And the PLC in the subsequent dewatering and filter-pressing device reads the weighing data of the belt scale according to a preset time interval and calculates the average value of the read weighing data in a preset time period so as to determine an output signal aiming at the preset time period.
Specifically, the belt weigher and the PLC are provided with RS-485 interfaces, the RS485 communication function can be realized through the interfaces, and the belt weigher and the PLC have high anti-interference performance. The PLC can read the weighing data of the belt weigher once every preset time interval through the 485 function, and then averages the weighing data read for a plurality of times in the preset time period.
For example, if the preset time interval is set to 1s and the preset time period is set to 5s, the PLC controller reads the weighing data of the belt scale every second, and calculates the average value of the read weighing data every 5 s. Since the dropping frequency of the sludge is not fixed, the number of times of reading data in these 5s is not fixed. The above parameters are only selected by way of example, and the present application is not limited thereto.
S103, determining an output signal of the PLC controller aiming at the sludge in the preset time period according to the average value.
After the PLC calculates the average value of a plurality of times of weighing data read in the preset time period, the output signal corresponding to the PLC can be determined according to the average value, so that the output flow of the medicament pump and the submersible pump can be controlled through the output signal in the following process.
Specifically, before determining the corresponding output signal according to the average value, firstly, determining the chemicals and water required for treating the sludge with different weights according to historical experience or reference data, so as to perform segmented treatment on the sludge according to the chemical amounts and water amounts required by the sludge with different weights, namely, dividing the weight of the sludge into a plurality of segmented intervals. Then, because the chemicals and water required by the sludge with the corresponding weight of each subsection interval are different, and the output signals of the corresponding PLC controllers are also different, the corresponding chemical quantity and water quantity can be controlled according to the output signals after the output signals corresponding to each subsection interval are determined.
Furthermore, the segment intervals are divided according to the weight of the sludge, so that the weight of the sludge corresponding to each segment interval has an increasing relationship. The PLC controller can sequentially allocate corresponding gears according to the ascending relationship of each sectional interval from large to small in weight, and each sectional interval corresponds to different gears and different output signals respectively. Therefore, after the section interval to which the sludge belongs is determined, the corresponding output signal can be determined, the output flow of the medicament and the water is adjusted, and timely and accurate dispensing of the solid sludge is realized.
In an embodiment of the present application, after calculating the average value of the weighing data, the PLC controller first determines a segment interval corresponding to the average value, and then determines an output signal of the corresponding PLC controller according to the segment interval.
The weight of the sludge is divided into a plurality of sectional intervals, and the corresponding output signals are determined according to the sectional intervals, so that different signals are output aiming at the sludge with different weights, the output flow of the medicament pump and the submersible pump is controlled by controlling the output signals, the dynamic adjustment of the dispensing proportion of the sludge with different weights is realized, and the device is more flexible, and more timely and accurate.
And S104, respectively controlling the output flow of the medicament pump and the submersible pump according to the output signals so as to adjust the ratio between the medicament and the water.
After the medicament pump and the submersible pump receive the output signals of the PLC, the respective frequency converters can be respectively adjusted according to the output signals, so that corresponding medicaments and water can be output according to different output signals, and the proportion between the medicaments and the water is adjusted to be suitable for treating the sludge with corresponding weight.
In one embodiment of the present application, the ac frequency converter can change the power frequency according to the external signal, thereby changing the rotation speed of the motor and achieving the function of adjusting the output flow. Therefore, after the medicament pump and the submersible pump receive the output signal output by the PLC, the corresponding gear of the frequency converter is firstly adjusted according to the output signal, and then the output frequency of the frequency converter is adjusted to the frequency corresponding to the gear according to the determined gear, so that the medicament quantity and the water quantity matched with the gear are output.
Fig. 2 is a schematic diagram of analysis of sludge weighing data provided in the embodiment of the present application.
In fig. 2, the aggregated analysis of 19570 pieces of experimental data is performed, as shown in fig. 2, the second column is divided into a plurality of segmented intervals, and the intervals are divided into 11 intervals according to different weights of sludge in the embodiment of the application, wherein each interval is divided into equal intervals, and the interval is 0.1. The third column summarizes the number of times the average lies in each mean interval. The fourth column is the ratio of the number of mean intervals to the total number. The fifth column shows the gear and output frequency of the drug pump and submersible pump corresponding to the average number interval, as can be seen from fig. 2, each average number interval corresponds to a different gear, and the gear and output frequency increase with the increase of the average number interval. The sixth column shows that the drug and water corresponding to each average interval were normally output and no failure occurred during the experiment.
It should be noted that, in the present application, the group distances between the segment intervals may be different, and more reasonable division may be performed according to application requirements.
In an embodiment of the application, the default water content of the sludge is 78%, in the embodiment of the application, when the sludge weight is subjected to segmented treatment, reagents and water required for treating the sludge with different weights are determined on the basis that the default water content is 78%, and in the process of conveying the sludge by using the belt weigher, part of the water in the sludge is inevitably lost, the water content is reduced, and in this case, the output flow rates of the reagents and water corresponding to each gear are still set for the default water content and are not suitable for the current sludge.
Therefore, under the condition that the length of the belt weigher is proper and the preset time period is proper, weighing data of the belt weigher for a piece of sludge are read for a plurality of times in the preset time period, and the weighing data of the belt weigher for a plurality of times are continuously reduced. The PLC can calculate the weight reduction speed of the sludge according to the difference value between the weighing data read for a plurality of times in the preset time period, and the weight reduction speed is used as the water loss speed of the sludge. Then, the actual water content of the sludge is calculated from the water diversion stall degree on the basis of the default water content. Finally, after the PLC transmits the output signal to the medicament pump and the submersible pump, the gear corresponding to the output signal is adjusted, so that the gear determined according to the average value interval is lowered under the condition that the water content is reduced, accurate dispensing and water distribution is realized, and the medicament waste is prevented.
In one embodiment of the application, the sludge is finally input into the double-shaft stirrer through the belt weigher, mixed with the prepared medicament and water in proportion, and dewatered through the dewatering and filter-pressing device after being uniformly stirred. And then, detecting the water content of the dewatered sludge by using a detector, if the water content and the standard value have a difference, indicating that the proportion of the prepared medicament and water is not accurate enough, and the divided plurality of sectional intervals are not reasonable enough, re-determining the medicament and water required for treating the sludge with different weights according to the difference between the standard value and the water content, modifying the divided plurality of sectional intervals, and adjusting corresponding output signals and gears according to the changed sectional intervals. And the sludge after dehydration is re-detected, and the preset sludge weight subsection interval, the corresponding output signal and the corresponding gear are adjusted according to the detection result, so that the accuracy of automatic dispensing and water distribution is further improved, and the problem of poor dehydration effect caused by medicament waste or insufficient medicament due to errors is avoided.
In an embodiment of the present application, whether the sludge is uniformly stirred also affects the subsequent dewatering effect, so that the corresponding stirring power can be adjusted according to the uniformity of the sludge before the sludge is stirred by the double-shaft stirrer.
Specifically, when the sludge falls onto the belt weigher and is conveyed to the resistance sensor along with the belt, the needle-shaped resistance sensor arranged above the belt weigher is inserted into the sludge downwards, so that the resistance of each part of the sludge is measured. And then, judging whether the sludge is uniform or not according to whether the resistances of all parts acquired by the resistance sensor are the same or whether the difference value between the resistances exceeds a threshold value, and obtaining the uniformity corresponding to the sludge. Then, the double-shaft mixer can adjust corresponding stirring power according to the received different degrees of consistency, and the stirring power that can make it keep even through increaseing the double-shaft mixer under the inhomogeneous condition of mud like this has avoided because of mud self inhomogeneous causes dewatering effect not good, has improved the dehydration efficiency of mud.
According to the sludge treatment method and the sludge treatment system, the weight of the sludge is read in real time through communication between the PLC and the belt scale, the medicament pump and the submersible pump, and the output flow of the medicament pump and the submersible pump is adjusted according to the weight of the sludge read in the preset time period, so that automatic dispensing and water distribution in the sludge treatment process are realized, and the labor cost is reduced;
dividing the weight of the sludge into a plurality of sectional intervals according to the medicament and water required by treating the sludge with different weights, and outputting different output signals aiming at the sectional intervals so as to adjust the medicament and the water aiming at the sludge with different weights in time, thereby realizing accurate and timely dispensing of solids;
the water content of the sludge is slightly reduced in the transportation process, and the gears of the medicament pump and the submersible pump which are arranged under the default water content are adjusted by detecting the actual water content of the sludge, so that the accuracy of the ratio of the medicament to the water is further improved, and the waste is prevented;
detecting the water content of the sludge after the sludge is dehydrated, and adjusting a plurality of pre-divided segmented intervals and corresponding output signals and gears according to the water content, so that the segmented intervals are divided more reasonably, and the accuracy of dispensing and water distribution is improved;
according to the corresponding stirring dynamics of the degree of consistency adjustment of mud, ensure that every piece of mud can both stir abundant, avoid influencing dewatering effect because of mud self is inhomogeneous.
The above is the method embodiment proposed by the present application. Based on the same inventive concept, the embodiment of the present application further provides a sludge treatment system, a schematic structural diagram of which is shown in fig. 3, and the sludge treatment system specifically includes: the device comprises a belt scale 1, a PLC (programmable logic controller) 2, a medicament pump 3, a submersible pump 4, a double-shaft stirrer 5 and a resistance sensor 6.
Specifically, the belt weigher 1 can transport sludge falling on a belt to the double-shaft stirrer 5, and the sludge is weighed by the weighing sensor.
The PLC 2 can read the weighing data on the belt scale 1 according to a preset time interval and calculate the average value of a plurality of times of weighing data read in the preset time. And determining a subsection interval corresponding to the average value according to a plurality of preset subsection intervals, determining an output signal corresponding to the subsection interval, and inputting the output signal to the medicament pump 3 and the submersible pump 4.
After the medicament pump 3 and the submersible pump 4 receive the output signals from the PLC 2, the corresponding gear of the frequency converter is adjusted according to the output signals, medicament and water output flow corresponding to the gear are output, and the proportion between the medicament and the water is adjusted.
The double-shaft stirrer 5 is used for receiving the sludge, the medicament and the water, mixing and uniformly stirring the sludge, the medicament and the water, and then conveying the sludge, the medicament and the water to a subsequent dehydration and pressure filtration device for dehydration.
The resistance sensor 6 is needle-shaped and is suspended above the belt scale 1 in a non-working state. When mud was transmitted to resistance sensor 6 below, a plurality of needle-like resistance sensor 6 can exert pressure downwards and insert and record its each part resistance in the mud, then detect the degree of consistency of this piece of mud through PLC controller 2 to give biax mixer 5, so that according to the corresponding stirring power of the different adjustment of degree of consistency, ensure that every piece of mud can both stir fully.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method of sludge treatment, the method comprising:
weighing the sludge dropped discontinuously by a belt scale;
based on a PLC (programmable logic controller), reading the weighing data of the sludge according to a preset time interval, and calculating the average value of the weighing data in a preset time period;
determining an output signal of the PLC controller for the sludge in the preset time period according to the average value;
and respectively controlling the output flow of the medicament pump and the submersible pump according to the output signals so as to adjust the ratio between the medicament and the water.
2. The method of claim 1, wherein before determining the PLC controller output signal for the sludge within the preset time period based on the average value, the method further comprises:
determining a plurality of subsection intervals corresponding to the sludge with different weights according to the medicament and water required by the sludge with different weights;
and determining output signals of the PLC corresponding to the subsection intervals so as to control the output flow of the medicament pump and the submersible pump according to the output signals.
3. A method of sludge treatment according to claim 2, characterized in that the method further comprises:
according to the increasing relation among the plurality of sectional intervals, corresponding gears are sequentially distributed to the sectional intervals according to the increasing order of the sizes; wherein, each gear corresponds to different output signals respectively.
4. The sludge treatment method according to claim 2, wherein determining the output signal of the PLC controller for the sludge in the preset time period according to the average value specifically comprises:
determining a segmentation interval corresponding to the average value;
and according to the subsection interval, determining an output signal of the PLC controller aiming at the sludge in the preset time period.
5. The sludge treatment method as claimed in claim 1, wherein the belt weigher and the PLC have 485 communication functions;
reading the weighing data of the sludge according to a preset time interval, and calculating the average value of the weighing data in a preset time period, wherein the method specifically comprises the following steps:
based on the PLC, reading the weighing data of the belt scale through the 485 communication function according to a preset time interval;
and determining the weighing data which are read for a plurality of times in a preset time period, and calculating the average value of the weighing data corresponding to the preset time period.
6. The sludge treatment method according to claim 1, wherein the output flow rates of the medicament pump and the submersible pump are respectively controlled according to the output signals, and the method specifically comprises the following steps:
determining the gears of a medicament pump frequency converter and a submersible pump frequency converter according to the output signals;
and according to the gears, determining the output frequencies corresponding to the medicament pump frequency converter and the submersible pump frequency converter respectively, and adjusting the output flow rates of the medicament pump and the submersible pump.
7. The method of sludge treatment according to claim 6, further comprising:
determining a plurality of times of weighing data read in a preset time period;
calculating the weight reduction speed of the sludge according to the difference value between the weighing data of the times;
taking the weight reduction speed as the water loss speed of the sludge, and determining the corresponding water content of the sludge according to the water loss speed;
and adjusting the gear corresponding to the determined output signal according to the water content.
8. The method of sludge treatment according to claim 1, further comprising:
measuring resistance of each part of the sludge based on a resistance sensor, and detecting the uniformity of the sludge according to the resistance;
aiming at different uniformity, the stirring power of the double-shaft stirrer is adjusted.
9. A method of sludge treatment according to claim 3, characterized in that the method further comprises:
detecting the water content of the dewatered sludge;
if the water content does not reach the standard value, carrying out segmentation processing on the plurality of segmented intervals again according to the difference value between the water content and the standard value to obtain a plurality of modified segmented intervals;
and adjusting the corresponding output signals and the corresponding gears according to the plurality of changed segment intervals.
10. A sludge treatment system, comprising:
the belt weigher is used for weighing and conveying the sludge;
the PLC is used for reading the weighing data of the sludge according to a preset time interval, calculating the average value of the weighing data in a preset time period and outputting a corresponding output signal;
a medicament pump for controlling the output flow of medicament;
the submersible pump is used for controlling the output flow of water;
the double-shaft stirrer is used for stirring the sludge, the medicament and the water;
and the resistance sensor is used for detecting the uniformity of the sludge so as to adjust the stirring power of the double-shaft stirrer according to the uniformity.
Priority Applications (1)
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|---|---|---|---|
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| JPH1110199A (en) * | 1997-06-18 | 1999-01-19 | Meidensha Corp | Chemical injection method and apparatus for sludge dewatering process |
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| CN101913741A (en) * | 2010-08-19 | 2010-12-15 | 北京中持绿色能源环境技术有限公司 | System and method for treating sludge containing heavy metal |
| CN102815851A (en) * | 2012-08-07 | 2012-12-12 | 上海交大辛德环保有限公司 | Depth sludge drying regulation system, and method thereof |
| CN202865079U (en) * | 2012-09-13 | 2013-04-10 | 上海同济环境工程科技有限公司 | Sludge stirring and weighing device and conditioning system with same |
| CN208110361U (en) * | 2018-04-23 | 2018-11-16 | 济宁金水科技有限公司 | A kind of self-checking device of sewage treatment PAM dosing |
| CN112624564A (en) * | 2020-12-19 | 2021-04-09 | 大连青乌环保科技有限公司 | Deep sludge dewatering system |
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| JPH1110199A (en) * | 1997-06-18 | 1999-01-19 | Meidensha Corp | Chemical injection method and apparatus for sludge dewatering process |
| JPH11319899A (en) * | 1998-05-07 | 1999-11-24 | Toshiba Corp | Sludge treating system |
| CN101913741A (en) * | 2010-08-19 | 2010-12-15 | 北京中持绿色能源环境技术有限公司 | System and method for treating sludge containing heavy metal |
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| CN202865079U (en) * | 2012-09-13 | 2013-04-10 | 上海同济环境工程科技有限公司 | Sludge stirring and weighing device and conditioning system with same |
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