CN116618421B - In-situ stabilization control system and method for stock garbage - Google Patents
In-situ stabilization control system and method for stock garbage Download PDFInfo
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 97
- 239000007789 gas Substances 0.000 claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/60—Biochemical treatment, e.g. by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/25—Non-industrial waste, e.g. household waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to an in-situ stabilization control system and method for stored garbage, and belongs to the technical field of garbage treatment. The system comprises an edge computing terminal, a management cloud platform, a PLC control system, a display module and a pile monitoring unit, wherein the display module, the PLC control system and the pile monitoring unit are electrically connected with the edge computing terminal, and the edge computing terminal is in data communication connection with the management cloud platform; the edge computing terminal is used for receiving and processing signal data from the display module and the pile monitoring unit, and sending a processing result to the PLC control system and the management cloud platform according to the data type by executing a control strategy. According to the invention, through carrying out layout planning on the well body, the circulation of gas in the interior of the pile body is promoted, and the regulation and control effects on parameters such as the temperature, the humidity, the oxygen content and the like in the interior of the pile body are improved; meanwhile, the control parameters are continuously optimized through comprehensively monitoring the real-time state inside the stack body, so that the degradation of organic matters is accelerated, and the treatment efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of garbage treatment, and particularly relates to an in-situ stabilization control system and method for stored garbage.
Background
The urban domestic garbage in China has large output, huge existing stock, serious environmental pollution, huge resource potential but extremely low conversion rate, and urgent demands for storage capacity and land release. The sustainable landfill technology achieves the aims of shortening the garbage stabilization time and recycling the storage capacity through the landfill, accelerating stabilization, exploitation and utilization and landfill process, and achieves the strategic aims of harmlessness, reduction and recycling.
At present, a sustainable low-pressure aeration technology is generally adopted in China, firstly, the technology has higher aeration efficiency for a pile body with shallow landfill depth, but the aeration efficiency starts to decrease along with the increase of the pile body depth, and when the pile body depth is further increased, the aeration efficiency of gas is rapidly decreased due to the influence of pile body sedimentation, compaction, percolate deposition and uneven distribution of garbage; and secondly, the model selection of the fan is directly carried out according to empirical data, the model selection is often not matched with site conditions, meanwhile, influence factors are not comprehensively considered for the regulation and control of the internal environment of the pile body, such as the influence of the sedimentation of the pile body on the ventilation of the pile body, the influence of the air injection on the internal temperature of the pile body is ignored by regulating and controlling the oxygen concentration in an air injection mode, the state of insufficient internal environment temperature of the pile body is often caused, the regulation and control of the temperature in an air extraction mode is single, the method is easy to be limited by the characteristics of equipment such as the fan, the parameters of a PID controller are not dynamically optimized any more in the regulation and control process, and the responsiveness is low.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an in-situ stabilization control system and method for the stored garbage, which promote the circulation of gas in a pile body by carrying out layout planning on a well body, improve the regulation and control effects on parameters such as temperature, humidity, oxygen content and the like in the pile body, and continuously optimize the control parameters by comprehensively monitoring the real-time state in the pile body, so that the environmental conditions in the pile body are more beneficial to the activity and propagation of microorganisms, accelerate the degradation of organic matters and improve the treatment efficiency.
The aim of the invention can be achieved by the following technical scheme:
the invention provides an in-situ stabilization control system for stored garbage, which comprises an edge computing terminal, a management cloud platform, a PLC control system, a display module and a pile monitoring unit, wherein the display module, the PLC control system and the pile monitoring unit are electrically connected with the edge computing terminal, and the edge computing terminal is in data communication connection with the management cloud platform;
the edge computing terminal is used for receiving and processing signal data from the display module and the pile monitoring unit, and sending a processing result to the PLC control system and the management cloud platform according to the data type by executing a control strategy;
the control strategy specifically comprises the following steps:
the test data input by the display module are sent to a management cloud platform to estimate the distribution of the compactness of the pile; transmitting all parameters in the pile body acquired by the pile body monitoring unit to a management cloud platform to acquire preset parameters of a PLC control system and corrected PID controller parameters; real-time data of temperature and humidity and gas components in the comprehensive monitoring well collected by the pile monitoring unit are sent to a PLC control system to serve as feedback parameters of a PID controller so as to complete closed-loop control of the PID controller;
converting the preset parameters into control commands, transmitting the control commands to a PLC control system to enable the PLC control system to start operation, acquiring various parameters in the pile body in real time through a pile body monitoring unit in the operation process, and updating the operation state of the PLC control system according to the received corrected preset parameters and PID controller parameters;
the fan power is finely adjusted according to the updated compactness or fans with different models are replaced by selecting points so as to compensate the problem of influencing radius change; the ventilation quantity of the air extraction fan is only finely adjusted in the regulation and control process, and the concentration of oxygen is compensated by the oxygen injection fan;
the temperature parameters in the pile body are regulated and controlled by an air extraction fan and injected leachate, and the injection of the leachate is mainly performed; the humidity parameter is regulated and controlled through the extraction and injection of the leachate, and the extraction of the leachate is the main part; the oxygen content is regulated and controlled by the air injection fan and the oxygen injection fan, and the oxygen injection fan is the main part.
As a preferable technical scheme of the invention, the display module is used for providing a visual interface of man-machine interaction and inputting the test data of the field survey into the edge computing terminal;
the test data of the field survey are specifically pile compactness obtained by carrying out multipoint measurement on the garbage pile by using a soil probe method by an explorator at an irregular period.
As an optimized technical scheme of the invention, the stack monitoring unit comprises a temperature and humidity transmitter and a gas component monitor which are arranged in the comprehensive monitoring well, and a gas component monitor, a pressure transmitter, a flow transmitter, a temperature transmitter and a humidity transmitter which are arranged in an air extraction pipeline, which are used for monitoring the change of various parameters in the stack in real time;
wherein the gas composition monitor is used for monitoring O 2 、H 2 S、NH 3 And CH (CH) 4 Equal gas concentration; comprehensively monitoring temperature and humidity in the pile body and gas component data acquired in the well, and inputting feedback parameters of a PLC control system; the gas composition, pressure, flow and temperature and humidity data collected in the air extraction pipeline are used for judging the aerobic stabilization process and correcting preset parameters.
As a preferable technical scheme of the invention, the PLC control system comprises a pump body for regulating and controlling the moisture in the stack body and a fan for regulating and controlling the air, and the PID controller is used for automatically completing the regulation of the output of the pump body or the fan by receiving a control instruction and a feedback parameter from the edge computing terminal.
As a preferable technical scheme of the invention, the pump body with the moisture regulation comprises a pump body with liquid injection and a pump body with leachate pumping; the air-regulating fan comprises an air extraction fan, an air injection fan and an oxygen injection fan, wherein the output of the oxygen injection fan is arranged on an output pipeline of the air injection fan and used for adjusting the oxygen content of air in the air injection pipeline.
As a preferable technical scheme of the invention, the control instruction comprises modifying parameters of a PID controller and adjusting the rotating speed of the fan; the feedback parameters are specifically stack internal data acquired by a temperature and humidity transmitter and a gas component monitor in the comprehensive monitoring well.
As a preferable technical scheme, the management cloud platform comprises a GIS well distribution system, a PID controller parameter correction system and an aerobic stabilization monitoring system, and is used for layout planning of well bodies in garbage piles, PID controller parameter correction of a PLC control system and judgment of an aerobic stabilization process, and correction of a preset value of a demand environmental condition of the piles in the aerobic stabilization reaction process is carried out through judgment of the aerobic stabilization process.
According to the GIS well distribution system, well spacing is determined according to the influence radius according to the compactness of the pile body and the influence radius, and errors of the influence radius are compensated through the compactness of the pile body.
The invention also provides an in-situ stabilization control method of the stock garbage, which is applied to the control system and comprises the following steps:
s1, calculating aeration and influence radius: calculating aeration through measuring and calculating aerobic degradation potential of garbage, measuring the change of gas concentration in a pile body through air suction and air injection to obtain the range of the influence radius, and drawing a semilog diagram of the change of the vacuum degree of a monitoring well along with the radial distance according to a pilot test, wherein the radial distance when the vacuum degree is 0 is the influence radius;
s2, determining well spacing and setting well bodies: firstly dividing regions according to a stack compactness distribution diagram, determining the intervals of well bodies in each region according to characteristic parameters of fans selected by aeration amounts in different regions and calculated influence radiuses, and setting the well bodies in the stack according to the delimited regions and the determined well intervals;
s3, determining preset parameters of the PLC control system: after hardware facilities of the in-situ stabilization control system are completed, preliminarily setting preset parameters of the PLC control system according to the determined aeration quantity, well spacing, compactness distribution and environmental condition parameters required by aerobic reaction;
s4, starting the system to operate: after the management cloud platform issues preset parameters to the edge computing terminal, a control command is issued to the PLC control system according to a control strategy, and the PLC control system is started to operate;
s5, collecting monitoring data: real-time data of temperature and humidity in the comprehensive monitoring well and gas components and real-time data of gas components, pressure, flow and temperature and humidity in the air exhaust pipeline, which are acquired by the pile monitoring unit, are processed by the edge processing terminal and then sent to the PLC control system and the management cloud platform;
s6, correcting preset parameters: the PLC control system completes the adjustment of the pump body or the fan output by taking the received real-time data of the temperature and the humidity and the gas components in the comprehensive monitoring well as the feedback parameters of the PID controller; the management cloud platform corrects parameters of the PID controller according to the collected real-time data of the temperature, the humidity and the gas components in the comprehensive monitoring well, and judges an aerobic stabilization process according to the collected real-time data of the gas components, the pressure, the flow and the temperature, the humidity in the air extraction pipeline, so that correction of preset parameters is carried out;
s7, updating preset parameters by the edge computing terminal: the edge computing terminal updates preset parameters of the PLC control system according to the corrected preset parameters from the management cloud platform;
s8, in-situ stabilization control of the garbage stack: and (5) circulating the steps S5-S7, and correcting preset parameters by continuously monitoring parameters in the garbage stack body so as to ensure that the in-situ aerobic stabilization reaction of the garbage stack body is efficiently completed.
Further, in the step S3, the hardware facilities of the in-situ stabilization control system include a comprehensive monitoring well monitoring component, a moisture regulation well regulation component and a gas regulation well regulation component; the comprehensive monitoring well monitoring assembly comprises a comprehensive monitoring well arranged in the pile body, a temperature and humidity transmitter and a gas component monitor in the comprehensive monitoring well; the water regulating and controlling assembly comprises a leachate well, a liquid pumping assembly, a liquid injecting assembly and a leachate collecting tank; the gas regulation and control well regulation and control assembly comprises a gas well, an air extraction assembly, an air injection assembly and an odor treatment device.
The beneficial effects of the invention are as follows:
(1) Firstly, through carrying out layout planning to the well body, promoting the circulation of gas in the interior of the pile body, improving the regulation and control effect to parameters such as interior temperature, humidity and oxygen content of the pile body, then through the continuous optimization control parameter of overall monitoring to the interior real-time state of the pile body for the interior environmental condition of the pile body does benefit to activity and propagation of microorganism more, accelerates the degradation of organic matter, improves treatment efficiency.
(2) The estimation of the compactness of the pile body is added in the layout planning process, so that the layout of the well body can effectively solve the problem that dead angle areas appear due to the reduction of air fluxion caused by the settlement of the pile body. Oxygen injection is matched in the process of regulating and controlling the oxygen content, so that the problem that the internal temperature is taken away too much due to overlarge air suction or air injection quantity is avoided, and the oxygen content is compensated; under the condition that the air suction or air injection quantity can only be finely adjusted, the injection of the leachate is added, the regulation and control of the temperature are ensured, and the moisture in the pile body is improved.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a schematic diagram of an in situ stabilization control system of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the invention with reference to the attached drawings and the preferred embodiment.
The embodiment of the application provides an in-situ stabilization control system for stock garbage, referring to fig. 1, comprising an edge computing terminal, a management cloud platform, a PLC control system, a display module and a pile monitoring unit, wherein the display module, the PLC control system and the pile monitoring unit are all electrically connected with the edge computing terminal, and the edge computing terminal is in data communication connection with the management cloud platform;
the edge computing terminal is used for receiving and processing signal data from the display module and the pile monitoring unit, and sending a processing result to the PLC control system and the management cloud platform according to the data type by executing a control strategy.
The control strategy specifically comprises the following steps:
the test data input by the display module are sent to a management cloud platform to estimate the distribution of the compactness of the pile; transmitting all parameters in the pile body acquired by the pile body monitoring unit to a management cloud platform to acquire preset parameters of a PLC control system and corrected PID controller parameters; and sending real-time data of the temperature and the humidity and the gas components in the comprehensive monitoring well collected by the pile monitoring unit to the PLC control system to serve as feedback parameters of the PID controller so as to complete closed-loop control of the PID controller.
And converting the preset parameters into control commands, transmitting the control commands to the PLC control system to enable the PLC control system to start operation, acquiring various parameters in the pile body in real time through the pile body monitoring unit in the operation process, and updating the operation state of the PLC control system according to the received corrected preset parameters and the parameters of the PID controller.
In the in-situ stabilization process, the fan power is finely adjusted according to the updated compactness or fans of different types are replaced by selecting points to compensate the problem of influencing radius change.
In order to avoid that the internal heat of the pile is taken away due to overlarge change of the ventilation quantity of the air extraction fan, the ventilation quantity of the air extraction fan is only finely adjusted in the regulation and control process, and the concentration of oxygen is compensated by the oxygen injection fan;
the temperature parameters in the pile body are regulated and controlled by an air extraction fan and injected leachate, and the injection of the leachate is mainly performed; the humidity parameter is regulated and controlled through the extraction and injection of the leachate, and the extraction of the leachate is the main part; the oxygen content is regulated and controlled by the air injection fan and the oxygen injection fan, and the oxygen injection fan is the main part.
It can be understood that after entering the in-situ stabilization process, the well layout and the fan model are set, so that the problem of ventilation reduction caused by the compactness change acquired in the in-situ stabilization process is compensated by adjusting the rotating speed of the fan, and accordingly, the injection amount of the leachate needs to be adjusted to ensure the stability of the stack temperature. In particular, when the ventilation requirement cannot be met after the fan rotation speed is adjusted, the ventilation requirement of the area is met by replacing the fan type. Therefore, based on the adjustment strategy, in the initial state, the fan is mainly used for guaranteeing ventilation quantity, leachate is injected for cooling and supplementing water, and a correction space is arranged for later adjustment.
The display module is used for providing a visual interface of man-machine interaction, and is convenient for operators to input the field surveyed test data into the edge computing terminal.
It should be noted that, the test data of the field survey refers to pile compactness obtained by performing multipoint measurement on the garbage pile by using a soil probe method at an irregular period of the exploratory staff.
The stack monitoring unit comprises a temperature and humidity transmitter and a gas component monitor which are arranged in the comprehensive monitoring well, and a gas component monitor, a pressure transmitter, a flow transmitter, a temperature transmitter and a humidity transmitter which are arranged in the air extraction pipeline, and is used for monitoring the change of various parameters in the stack in real time.
The gas composition monitor is used for monitoring O 2 、H 2 S、NH 3 And CH (CH) 4 The concentration of the isogas; in order to facilitate the control and monitoring of the aerobic stabilization of the garbage stack, a comprehensive monitoring well, a moisture regulating well and a gas regulating well are arranged in the stack. The comprehensive monitoring well is used for monitoring the real-time state of the temperature and humidity and the gas components in the pile; the water regulating well is used for injecting and extracting leachate; gas control well for pileAnd (5) air suction and air injection.
It can be understood that the components such as the water regulating well and the peripheral leachate collecting tank form a leachate recharging system, the infiltration liquid is injected to increase the humidity of the pile body, promote the aerobic reaction speed, and the conditioned leachate microorganism activity is enhanced, thereby being beneficial to accelerating the microbial reaction speed in the pile body and accelerating the degradation.
It should be noted that, the data such as the temperature and humidity and the gas components in the pile body collected in the comprehensive monitoring well are used for inputting feedback parameters of the PLC control system; the data of gas components, pressure, flow, temperature and humidity and the like collected in the air exhaust pipeline are used for judging the aerobic stabilization process and correcting preset parameters.
It can be understood that the influence radius of the gas well can be obtained through pressure monitoring, gas concentration monitoring and the like of field tests, so that after the well layout is completed, the influence of the anisotropic characteristics of the stack on the influence radius, such as the air quantity of a fan and the like, can be reduced by correcting preset parameters through various data collected in an air extraction pipeline.
The PLC control system comprises a pump body for regulating and controlling the moisture in the stack body and a fan for regulating and controlling the air, and the PID controller is used for automatically completing the regulation of the output of the pump body or the fan by receiving control instructions and feedback parameters from the edge computing terminal.
The pump body for regulating the water content comprises a pump body for injecting liquid and a pump body for pumping leachate; the air-regulating fan comprises an air extraction fan, an air injection fan and an oxygen injection fan, wherein the output of the oxygen injection fan is arranged on an output pipeline of the air injection fan and used for adjusting the oxygen content of air in the air injection pipeline.
It is understood that the control instruction includes modifying parameters of the PID controller, adjusting the rotation speed of the fan, and the like; the feedback parameters are specifically stack internal data acquired by a temperature and humidity transmitter and a gas component monitor in the comprehensive monitoring well.
The management cloud platform comprises a GIS well distribution system, a PID controller parameter correction system and an aerobic stabilization monitoring system, and is used for layout planning of well bodies in a garbage stack body, PID controller parameter correction of a PLC control system and judgment of an aerobic stabilization process, and correction of a preset value of a demand environmental condition of the stack body in an aerobic stabilization reaction process is carried out through judgment of the aerobic stabilization process, so that regulation and control of oxygen concentration, temperature and humidity in the reaction process are kept in a reaction optimal state.
It should be noted that, the GIS well distribution system performs layout planning of the well body according to the compactness of the pile body and the influence radius obtained by estimating the data such as the test data and the equipment parameters from the edge computing terminal, wherein the planning mainly determines the well body distance according to the influence radius, the compactness of the pile body is used for compensating the influence radius error, and the influence radius error refers to the error generated by the influence radius due to the situation that the compactness of different positions of the pile body is different. The well arrangement method can also reduce the influence of the change of the environmental conditions in the pile body caused by the settlement of the pile body on the stabilization effect of the whole garbage pile body.
The equipment parameters are characteristic parameters of the actually adopted fan, the frequency converter and other equipment, such as the type, rated air quantity, rated power and the like of the fan, the rated power and the output frequency range of the frequency converter and the like.
The estimation of the compactness of the pile is combined with a geographic information system (Geographic Information System, GIS), and the compactness of the whole pile is estimated and integrated with a map by utilizing the compactness of the pile obtained through the measurement of a multipoint soil probe, specifically:
(1) Data preparation: GIS data related to garbage pile body collection and arrangement, including factors influencing compactness such as topography, soil type and rainfall. Meanwhile, the compactness data of multipoint measurement are imported into the GIS.
(2) And (3) data interpolation processing: and (3) interpolating the existing compactness data by adopting an interpolation method to generate a compactness surface model of a whole region, and selecting a proper interpolation method supported by the GIS according to the data distribution condition.
(3) Compactness analysis: and analyzing the compactness level of each region by using a space analysis tool to obtain the compactness difference conditions of different parts.
(4) Visualization of results: and generating a compactness distribution map through the GIS, and intuitively displaying the compactness distribution on a map.
The soil probe method is to measure the compactness of the garbage pile by using a soil probe or a compression gauge, and record the readings and calculate the compactness by inserting a probe into the garbage pile. The soil probe method is convenient, but only the compactness of the probe position can be measured, so that multipoint measurement is needed.
The embodiment of the application also provides an in-situ stabilization control method of the stock garbage, which comprises the following steps:
s1, calculating aeration and influence radius: and calculating aeration through measuring and calculating aerobic degradation potential of the garbage, measuring the change of gas concentration in the pile body through air suction and air injection to obtain the range of the influence radius, and drawing a semilog diagram of the change of the vacuum degree of the monitoring well along with the radial distance according to a pilot test, wherein the radial distance when the vacuum degree is 0 is the influence radius.
The calculation formula of the aeration quantity adopts:
wherein Q is total pumping/gas injection quantity of the landfill site, and the unit is m/min; m is m G The unit is kg of the total mass of the landfill waste; c (C) 0 And C i Biodegradable (BDM) of the waste before and after repair, respectively; kr is the treatment standard rate; l (L) BDM The aerobic degradation potential of BDM, namely the mass of oxygen required for degrading BDM per unit mass; t is the treatment age;mass of the substance being oxygen; />Is the oxygen utilization rate; c is a safety coefficient.
It should be noted that, the well spacing has empirical data of 10m-25m, and in practical projects, the comprehensive economic cost considers to select a reasonable well spacing; in order to ensure the efficiency of the aerobic reaction, the oxygen concentration (volume fraction) in the reactor body is controlled to be 16-21% according to experience.
The calculation formula of the influence radius adopts:
wherein P is r A monitoring well pressure (Pa) at a distance r from the extraction well; p (P) w Is the pressure (Pa) of the gas-pumping well;to effectively influence the pressure (Pa) at the radius; r is the radial distance (m) between the monitoring well and the gas extraction well; r is R I To effectively influence the radius (m); rw is the extraction well radius (m).
S2, determining well spacing and setting well bodies: firstly dividing regions according to a stack compactness distribution diagram, determining the intervals of well bodies in each region according to characteristic parameters of fans selected by aeration amounts and calculated influence radiuses in different regions, and setting the well bodies in the stack according to the delimited regions and the determined well intervals.
Specifically, in the layout process of the well body, the characteristic parameters of the fan, the influence radius of the gas well and the compactness distribution of the pile body are comprehensively considered to ensure the temperature and oxygen concentration distribution inside the pile body, and meanwhile, the analysis of the compactness distribution of the pile body is added, so that the situation of poor ventilation in the pile body caused by the settlement of the garbage pile body is avoided to the greatest extent.
S3, determining preset parameters of the PLC control system: after hardware facilities of the in-situ stabilization control system are completed, preset parameters of the PLC control system, such as the air quantity of the fan and the flow of the pump body, are initially set according to the determined aeration quantity, well spacing, compactness distribution and environmental condition parameters required by the aerobic reaction.
It should be noted that the hardware facilities of the in-situ stabilization control system include a comprehensive monitoring well monitoring assembly, a moisture regulating well regulating assembly and a gas regulating well regulating assembly; the comprehensive monitoring well monitoring assembly comprises a comprehensive monitoring well arranged in the pile body, a temperature and humidity transmitter and a gas component monitor in the comprehensive monitoring well; the water regulating and controlling assembly comprises a leachate well, a liquid pumping assembly, a liquid injecting assembly and a leachate collecting tank; the gas regulation and control well regulation and control assembly comprises a gas well, an air extraction assembly, an air injection assembly and an odor treatment device.
S4, starting the system to operate: after the management cloud platform issues the preset parameters to the edge computing terminal, a control command is issued to the PLC control system according to the control strategy, and the PLC control system is started to operate.
S5, collecting monitoring data: real-time data of temperature and humidity in the comprehensive monitoring well and gas components and real-time data of gas components, pressure, flow and temperature and humidity in the air exhaust pipeline, which are acquired by the pile monitoring unit, are processed by the edge processing terminal and then sent to the PLC control system and the management cloud platform.
It should be noted that, only real-time data of humiture and gas components in the comprehensive monitoring well is sent to the PLC control system, and all collected data are sent to the management cloud platform.
S6, correcting preset parameters: the PLC control system completes the adjustment of the pump body or the fan output by taking the received real-time data of the temperature and the humidity and the gas components in the comprehensive monitoring well as the feedback parameters of the PID controller; and the management cloud platform corrects parameters of the PID controller according to the collected real-time data of the temperature, the humidity and the gas components in the comprehensive monitoring well, and judges an aerobic stabilization process according to the collected real-time data of the gas components, the pressure, the flow and the temperature, the humidity in the air extraction pipeline, so that correction of preset parameters is carried out.
It should be noted that, the parameters corrected by the PID controller include a proportional coefficient, an integral coefficient and a differential coefficient, the specific correction is completed by adopting a neural network learning algorithm, training and testing are performed by constructing a suitable neural network, and parameter optimization is completed according to the actually collected data, which is not described herein.
The determination of the aerobic stabilization process obtains the process information of the reaction according to the concentration change condition of gases (such as carbon dioxide, methane and the like) generated in the garbage stack body and the change condition of environmental parameters such as temperature, pH value, moisture content and the like in the reaction process, thereby optimizing preset parameters according to the characteristics of the aerobic reaction.
S7, updating preset parameters by the edge computing terminal: and the edge computing terminal updates preset parameters of the PLC control system according to the corrected preset parameters from the management cloud platform.
S8, in-situ stabilization control of the garbage stack: and (5) circulating the steps S5-S7, and correcting preset parameters by continuously monitoring parameters in the garbage stack body so as to ensure that the in-situ aerobic stabilization reaction of the garbage stack body is efficiently completed.
According to the invention, firstly, through carrying out layout planning on the well body, the circulation of gas in the interior of the pile body is promoted, the regulation and control effects on parameters such as temperature, humidity and oxygen content in the interior of the pile body are improved, and then, through comprehensively monitoring the real-time state in the interior of the pile body, the control parameters are continuously and dynamically optimized, so that the environmental conditions in the interior of the pile body are more beneficial to the activity and propagation of microorganisms, the degradation of organic matters is accelerated, and the treatment efficiency is improved.
The estimation of the compactness of the pile body is added in the layout planning process, so that the layout of the well body can effectively solve the problem that dead angle areas appear due to the reduction of air fluxion caused by the settlement of the pile body. Oxygen injection is matched in the process of regulating and controlling the oxygen content, so that the problem that the internal temperature is taken away too much due to overlarge air suction or air injection quantity is avoided, and the oxygen content is compensated; under the condition that the air suction or air injection quantity can only be finely adjusted, the injection of the leachate is added, the regulation and control of the temperature are ensured, and the moisture in the pile body is improved.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (7)
1. An in-situ stabilization control system for stock garbage, which is characterized in that: the system comprises an edge computing terminal, a management cloud platform, a PLC control system, a display module and a pile monitoring unit, wherein the display module, the PLC control system and the pile monitoring unit are electrically connected with the edge computing terminal, and the edge computing terminal is in data communication connection with the management cloud platform;
the edge computing terminal is used for receiving and processing signal data from the display module and the pile monitoring unit, and sending a processing result to the PLC control system and the management cloud platform according to the data type by executing a control strategy;
the control strategy of the edge computing terminal specifically comprises the following steps:
transmitting test data input by a display module and various parameters in the pile body acquired by a pile body monitoring unit to a management cloud platform to acquire compactness distribution of the pile body, preset parameters of a PLC (programmable logic controller) system and corrected PID (proportion integration differentiation) controller parameters; real-time data of temperature and humidity and gas components in the comprehensive monitoring well collected by the pile monitoring unit are used as feedback parameters of a PID controller to be sent to a PLC control system;
converting the preset parameters into control commands and transmitting the control commands to a PLC control system to enable the control commands to start running, and updating the running state of the PLC control system by all parameters in the pile body, the corrected preset parameters and the received PID controller parameters, which are acquired in real time by a pile body monitoring unit in the running process;
the fan power is finely adjusted according to the updated compactness or fans with different models are replaced by selecting points so as to compensate the problem of influencing radius change; the ventilation quantity of the air extraction fan is only finely adjusted in the regulation and control process, and the concentration of oxygen is compensated by the oxygen injection fan;
the temperature parameters in the pile body are regulated and controlled by an air extraction fan and injected leachate, and the injection of the leachate is mainly performed; the humidity parameter is regulated and controlled through the extraction and injection of the leachate, and the extraction of the leachate is the main part; the oxygen content is regulated and controlled by an air injection fan and an oxygen injection fan, and the oxygen injection fan is taken as the main part;
the PLC control system comprises a pump body for regulating and controlling the moisture in the stack body and a fan for regulating and controlling the air, and the PID controller is used for automatically completing the regulation of the output of the pump body or the fan by receiving a control instruction and a feedback parameter from the edge computing terminal;
the control instruction specifically comprises the following steps: modifying parameters of the PID controller and adjusting the rotating speed of the fan; the feedback parameters are specifically as follows: comprehensively monitoring data in the stack, which are acquired by a temperature and humidity transmitter and a gas component monitor in the well;
the management cloud platform comprises a GIS well distribution system, a PID controller parameter correction system and an aerobic stabilization monitoring system, and is used for layout planning of well bodies in garbage piles, PID controller parameter correction of a PLC control system and judgment of an aerobic stabilization process, and preset value correction of the required environmental conditions of the piles in the aerobic stabilization reaction process is carried out through judgment of the aerobic stabilization process.
2. An in situ stabilization control system for waste in stock as claimed in claim 1, wherein: the display module is used for providing a visual interface of man-machine interaction and inputting the test data of the field survey into the edge computing terminal;
the test data of the field survey are specifically pile compactness obtained by carrying out multipoint measurement on the garbage pile by using a soil probe method by an explorator at an irregular period.
3. An in situ stabilization control system for waste in stock as claimed in claim 1, wherein: the stack monitoring unit comprises a temperature and humidity transmitter and a gas component monitor which are arranged in the comprehensive monitoring well, and a gas component monitor, a pressure transmitter, a flow transmitter, a temperature transmitter and a humidity transmitter which are arranged in the air extraction pipeline, wherein the temperature and humidity transmitter is used for monitoring the change of each parameter in the stack in real time;
wherein the gas composition monitor is used for monitoring O 2 、H 2 S、NH 3 And CH (CH) 4 Is a gas concentration of (1); comprehensive monitoring of temperature and humidity in pile collected in wellThe gas component data are used for inputting feedback parameters of the PLC control system; the gas composition, pressure, flow and temperature and humidity data collected in the air extraction pipeline are used for judging the aerobic stabilization process and correcting preset parameters.
4. An in situ stabilization control system for waste in stock as claimed in claim 1, wherein: the pump body for regulating the moisture comprises a pump body for injecting liquid and a pump body for pumping leachate; the air-regulating fan comprises an air extraction fan, an air injection fan and an oxygen injection fan, wherein the output of the oxygen injection fan is arranged on an output pipeline of the air injection fan and used for adjusting the oxygen content of air in the air injection pipeline.
5. An in situ stabilization control system for waste in stock as claimed in claim 1, wherein: the specific well distribution of the GIS well distribution system comprises pile compactness and an influence radius, well spacing is determined through the influence radius, and errors of the influence radius are compensated through the pile compactness.
6. An in-situ stabilization control method of stock garbage, applied to an in-situ stabilization control system of stock garbage as set forth in any one of claims 1 to 5, characterized in that: the method comprises the following steps:
s1, calculating aeration and influence radius: calculating aeration through measuring and calculating aerobic degradation potential of garbage, measuring the change of gas concentration in a pile body through air suction and air injection to obtain the range of the influence radius, and drawing a semilog diagram of the change of the vacuum degree of a monitoring well along with the radial distance according to a pilot test, wherein the radial distance when the vacuum degree is 0 is the influence radius;
s2, determining well spacing and setting well bodies: firstly dividing regions according to a stack compactness distribution diagram, determining the intervals of well bodies in each region according to characteristic parameters of fans selected by aeration amounts in different regions and calculated influence radiuses, and setting the well bodies in the stack according to the delimited regions and the determined well intervals;
s3, determining preset parameters of the PLC control system: after hardware facilities of the in-situ stabilization control system are completed, preliminarily setting preset parameters of the PLC control system according to the determined aeration quantity, well spacing, compactness distribution and environmental condition parameters required by aerobic reaction;
s4, starting the system to operate: after the management cloud platform issues preset parameters to the edge computing terminal, a control command is issued to the PLC control system according to a control strategy, and the PLC control system is started to operate;
s5, collecting monitoring data: real-time data of temperature and humidity in the comprehensive monitoring well and gas components and real-time data of gas components, pressure, flow and temperature and humidity in the air exhaust pipeline, which are acquired by the pile monitoring unit, are processed by the edge processing terminal and then sent to the PLC control system and the management cloud platform;
s6, correcting preset parameters: the PLC control system completes the adjustment of the pump body or the fan output by taking the received real-time data of the temperature and the humidity and the gas components in the comprehensive monitoring well as the feedback parameters of the PID controller; the management cloud platform corrects parameters of the PID controller according to the collected real-time data of the temperature, the humidity and the gas components in the comprehensive monitoring well, and judges an aerobic stabilization process according to the collected real-time data of the gas components, the pressure and the flow in the air extraction pipeline, so that preset parameter correction is carried out;
s7, updating preset parameters by the edge computing terminal: the edge computing terminal updates preset parameters of the PLC control system according to the corrected preset parameters from the management cloud platform;
s8, in-situ stabilization control of the garbage stack: and (S5-S7) performing preset parameter correction by continuously monitoring parameters in the pile body.
7. The in-situ stabilization control method of stock waste as claimed in claim 6, wherein: in the step S3, the hardware facilities of the in-situ stabilization control system comprise a comprehensive monitoring well monitoring component, a moisture regulation well regulation component and a gas regulation well regulation component;
the comprehensive monitoring well monitoring assembly comprises a comprehensive monitoring well arranged in the pile body, a temperature and humidity transmitter and a gas component monitor in the comprehensive monitoring well; the water regulating and controlling assembly comprises a leachate well, a liquid pumping assembly, a liquid injecting assembly and a leachate collecting tank; the gas regulation and control well regulation and control assembly comprises a gas well, an air extraction assembly, an air injection assembly and an odor treatment device.
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