CN105251760A - Automatic aeration control method based on multi-section type aerating system - Google Patents
Automatic aeration control method based on multi-section type aerating system Download PDFInfo
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- CN105251760A CN105251760A CN201510674581.1A CN201510674581A CN105251760A CN 105251760 A CN105251760 A CN 105251760A CN 201510674581 A CN201510674581 A CN 201510674581A CN 105251760 A CN105251760 A CN 105251760A
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- aeration
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- 238000005273 aeration Methods 0.000 title claims abstract description 267
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005276 aerator Methods 0.000 claims description 72
- 238000007789 sealing Methods 0.000 claims description 61
- 238000002347 injection Methods 0.000 claims description 38
- 239000007924 injection Substances 0.000 claims description 38
- 239000002689 soil Substances 0.000 claims description 28
- 229910000639 Spring steel Inorganic materials 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 229920006311 Urethane elastomer Polymers 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 229920003225 polyurethane elastomer Polymers 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 4
- 241000168254 Siro Species 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 101100408464 Caenorhabditis elegans plc-1 gene Proteins 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The embodiment of the invention provides an automatic aeration control method based on a multi-section type aerating system. The automatic aeration control method sequentially includes the following steps that an aerating device is arranged on a bottom aerating layer section of an aerating well, and a frequency converter and an electromagnetic valve receive a control signal of a PLC and control an aerating machine to carry out aerating on the interior of the bottom aerating layer section through the aerating device; in the aerating process, an air pressure sensor transmits an air pressure control signal in the bottom aerating layer section to the PLC in real time through a transmitter; the PLC outputs a corresponding control signal to the frequency converter and the electromagnetic valve according to the aerating pressure control requirement of the bottom aerating layer section and the received air pressure control signal transmitted by the pressure sensor; and the frequency converter and the electromagnetic valve control the aerating machine to carry out aerating on the interior of the bottom aerating layer section through the aerating device, so that it is guaranteed that the pressure in the bottom aerating layer section reaches the preset aerating pressure in the bottom aerating layer section, and the aerating pressure is maintained to conduct continuous and stable aerating within preset aerating time.
Description
Technical field
The embodiment of the present invention relates to soil pollution and repairs field, particularly relates to a kind of automatic aeration control method based on multisection type aerating system.
Background technology
Multisection type aeration process is the recovery technique of volatilization and half volatile organic contaminant in a kind of effective removal soil.Specifically refer to fresh air injected enter after soil media, volatile contaminant under buoyancy progressively on move, then undertaken collecting and processing by gas gathering system, thus complete the removal to pollutant.
One of key link in aeration process is to provide scientific and reasonable aeration pressure and aeration time, and for the soil media that permeability is different, aeration influence area has very large difference.Therefore, multisection type aeration process according to the infiltrative difference of soil media, can provide different aeration pressure and aeration time, to enable air fully enter into pollution medium, finally realizes the removal to pollutant.But multisection type aeration process of the prior art can not realize Automated condtrol, not easily realize running continuously in operation, have impact on the scope of application of multisection type aeration process.
Therefore, need a kind of novel aeration method and aerator thereof, solve the technical problem problem that prior art exists, and improve range of application and the result of use of AS technology.
Summary of the invention
For prior art Problems existing, the embodiment of the present invention provides a kind of automatic aeration control method based on multisection type aerating system, according to the fact of monitoring soil, can realize automation mechanized operation and the running continuously of aeration process.
The embodiment of the present invention provides a kind of automatic aeration control method based on multisection type aerating system, it comprises the following steps and order: bottom aeration interval aerator being positioned over aeration well, frequency converter and magnetic valve receive the control signal of PLC, control aerator by described aerator to aeration in the aeration interval of described bottom, in aeration process, the air pressure control signal in the aeration interval of described bottom is sent to described PLC programmable controller by transmitter by baroceptor in real time; The air pressure control signal that the described pressure sensor that described PLC programmable controller requires according to the aeration Stress control of described bottom aeration interval and receives sends, export and control signal to described frequency converter and described magnetic valve accordingly, aerator described in described frequency converter and described solenoid control by described aerator to aeration in the aeration interval of described bottom, to ensure that the pressure in the aeration interval of described bottom reaches the default aeration pressure of described bottom aeration interval, and maintain described aeration pressure continual and steady aeration in default aeration time; After arriving described default aeration time, described PLC programmable controller outputs control signals to carries device, realizes the last layer aeration interval described aerator and described baroceptor simultaneously upwards carried to described bottom aeration interval; After described aerator and described pressure sensor arrive described last layer aeration interval simultaneously, described PLC programmable controller starts the aeration of a new round automatically according to the aeration pressure corresponding with described one deck aeration interval preset in advance and aeration time, with this repeatedly, the aeration work of all aeration intervals in described aeration well is finally completed.
Preferably, before carry out step 1, further comprising the steps of: by the coefficient of permeability K value of the PLC control panel on described PLC programmable controller by soil in each described aeration interval, described PLC programmable controller is inputed to successively to upper strata aeration interval according to by described bottom aeration interval, so that described K value is changed into aeration pressure needed for each described aeration interval by the operation program preset by described PLC programmable controller, and arranges the default aeration pressure of each described aeration interval; The aeration time of each described aeration interval is inputed to described PLC programmable controller; After described aerator often being completed the aeration of an aeration interval, by the distance input extremely described PLC programmable controller above carried.
Preferably, described control signal is 4 ~ 20mA signal.
Preferably, described aerator comprises: the first sealing device and the second sealing device, and described first sealing device and described second sealing device are circular platform type, and side is provided with spring steel plate bracing or strutting arrangement; The making material of described first sealing device and described second sealing device comprises urethane rubber materials.
Preferably, described aerator comprises: aeration tube, and described aeration tube comprises aeration vertical tube, and described aeration vertical tube is provided with multiple body hole, and described body hole is connected with aeration branch pipe, in an inclination angle between described aeration branch pipe and described aeration vertical tube.
Preferably, described aerator comprises: air injection pipe, and described air injection pipe is polyvinyl chloride (PVC) pipe, and the lower end of described air injection pipe is connected with the upper end of described aeration tube through described first sealing device.
Preferably, described aerator also comprises: magnetic valve, and described magnetic valve is arranged on the pipeline between the upper end of described air injection pipe and aerator, and is connected with described PLC programmable controller, for cutting off or being communicated with described air injection pipe.
Preferably, described aerator also comprises: Pressure gauge, and described Pressure gauge is arranged on the pipeline between the upper end of described air injection pipe and aerator, for the output pressure of aerator described in Real-Time Monitoring.
In addition, preferably, described aerator also comprises: flowmeter, and described flowmeter is arranged on the pipeline between the upper end of described air injection pipe and aerator, for the output flow of aerator described in Real-Time Monitoring.
According to a kind of automatic aeration control method based on multisection type aerating system that the embodiment of the present invention provides, one, this system can realize Automated condtrol, can according to the infiltrative difference of soil media, by on-line monitoring and digitized signal conversion, auto-changing aeration pressure and aeration time carry out aeration, thus realize the normal running continuously of whole aerator, finally realize the removal of pollutant in soil.They are two years old, this system aeration is even, adopt the design of interim aeration from the bottom to top effectively can avoid the problem being difficult to uniform aeration caused because soil media is heterogeneous, aerating system adopts the design of non-equidistant perforate can solve because injection air pressure reduces the uneven problem of caused aeration from top to bottom gradually in addition.They are three years old, this system air injection device energy consumption is low, owing to have employed the design of aeration branch pipe, make air once enter after aerating system through air injection tube, compressed air can only outwards spread through aeration branch pipe and then carry out aeration to soil media, and can not reverse flow, reenter aerating system, so just effectively reduce the energy consumption of air Injection equipment.Its four, this Dynamic System is flexible.Aeration time and the aeration number of times of needs of each stage can be controlled by the concentration of volatile organic contaminant in monitoring soil during practical engineering application, thus reach the object of full and uniform aeration, improve the removal efficiency of pollutant.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the control method of the automatic aeration system that the present invention is based on multisection type aerating system;
Fig. 2 is the automatic aeration control system schematic diagram that the present invention is based on multisection type aerating system.
Reference numeral:
1:PLC programmable controller; 2: transmitter; 3: frequency converter; 4: aerator;
5: magnetic valve; 6: Pressure gauge; 7: flowmeter; 8: above carry device; 9: aeration tube;
10: aerator; 11: baroceptor; 12: soil media; 13: the aeration borehole wall.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The main thought of the embodiment of the present invention is, according to the technical scheme of the embodiment of the present invention, can according to the infiltrative difference of soil media, by on-line monitoring and digitized signal conversion, auto-changing aeration pressure and aeration time carry out aeration, thus realize the normal running continuously of whole aerator, finally realize the removal of pollutant in soil.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is the schematic flow sheet of the control method of the automatic aeration system that the present invention is based on multisection type aerating system, as shown in Figure 1:
Control method based on the automatic aeration system of multisection type aerating system comprises the following steps and order:
Step S101, aerator 10 is positioned over the bottom aeration interval of aeration well, frequency converter 3 and magnetic valve 5 receive the control signal of PLC 1, control aerator 4 by aerator 10 to aeration in the aeration interval of bottom, in aeration process, the air pressure control signal in the aeration interval of bottom is sent to PLC programmable controller 1 by transmitter 2 by baroceptor 11 in real time.
Step S102, the air pressure control signal that the pressure sensor 11 that PLC programmable controller 1 requires according to the aeration Stress control of bottom aeration interval and receives sends, export and control signal to frequency converter 3 and magnetic valve 5 accordingly, frequency converter 3 and magnetic valve 5 control aerator 4 by aerator 10 to aeration in the aeration interval of bottom, to ensure that the pressure in the aeration interval of bottom reaches the default aeration pressure of bottom aeration interval, and maintain aeration pressure continual and steady aeration in default aeration time.
Step S103, arrive after presetting aeration time, PLC programmable controller 1 outputs control signals to carries device 8, realizes last layer aeration interval aerator 10 and baroceptor 11 simultaneously upwards carried to bottom aeration interval.
Step S104, after aerator 10 and pressure sensor 11 arrive last layer aeration interval simultaneously, PLC programmable controller 1 starts the aeration of a new round automatically according to the aeration pressure corresponding with one deck aeration interval preset in advance and aeration time, with this repeatedly, the aeration work of all aeration intervals in aeration well is finally completed.
Preferably, before carrying out the automatic aeration control system operation based on multisection type aerating system, further comprising the steps of: by the coefficient of permeability K value of the PLC control panel on PLC programmable controller 1 by soil in each aeration interval, PLC programmable controller 1 is inputed to successively to upper strata aeration interval according to by bottom aeration interval, so that K value is changed into aeration pressure needed for each aeration interval by the operation program preset by PLC programmable controller 1, and arranges the default aeration pressure of each aeration interval; The aeration time of each aeration interval is inputed to PLC programmable controller 1; After aerator 10 often being completed the aeration of an aeration interval, by the distance input above carried to PLC programmable controller 1.
Preferably, control signal is 4 ~ 20mA signal.
In the present embodiment, the automatic aeration control system based on multisection type aerating system comprises the following steps and order:
The first step is by the graded of soil permeability (the i.e. infiltration coefficient of each layer soil, K value) upwards input to PLC control panel successively according to by aeration layer of the most end, original K value is changed into aeration pressure needed for each section by the operation program preset by PLC programmable controller 1; And the aeration time that can input on PLC control panel after each section of aeration pressure stability.
Second step is polluted soil aerator 10 being in the bottom, the aeration pressure of PLC programmable controller 1 needed for this section calculated, export 4 corresponding ~ 20mA and control signal to magnetic valve 5 with the frequency converter 3 of 4 ~ 20mA signal receiving function, aerator 4 and correspondence thereof, automatically control aerator 4 and carry out aeration in aeration well.
3rd step is in aeration process, and baroceptor 11 is positioned at aeration well, for detecting the air pressure in aeration well, exporting 4 corresponding ~ 20mA control signal to PLC programmable controller 1 by transmitter 2.
Baroceptor 11 effect be aerating system start aeration time, pressure in baroceptor 11 Real-Time Monitoring enclosure space, PLC programmable controller 1 is output control signals to by transmitter 2, the aeration Stress control requirement of PLC programmable controller 1 needed for this section, export and control signal to frequency converter 3 and corresponding magnetic valve 5 accordingly, the pressure in seal cavity is made to reach force value needed for this section of aeration interval, when the pressure in seal cavity reaches the pressure needed for this section of aeration interval, pressure in baroceptor 11 Real-Time Monitoring enclosure space, PLC programmable controller 1 is output control signals to by transmitter 2, the aeration Stress control requirement of PLC programmable controller 1 needed for this section, export and control signal to frequency converter 3 and corresponding magnetic valve 5 accordingly, the pressure in seal cavity is made to maintain force value needed for this section of aeration interval, and carry out continual and steady aeration according to the aeration time preset.
4th step is the aeration Stress control requirement of PLC programmable controller 1 needed for this section, export corresponding 4 ~ 20mA and control signal to frequency converter 3 with 4 ~ 20mA signal receiving function and corresponding magnetic valve 5, the pressure realized in this section of aeration well maintains required aeration pressure, and carries out continual and steady aeration according to the aeration time set in advance.
5th step is that PLC programmable controller 1 exports controlling signal to of 4 ~ 20mA and carries device 8 with on 4 ~ 20mA signal receiving function when after arrival setting aeration time, realizes aerator and baroceptor 11 upwards to carry to the preceding paragraph aeration layer simultaneously.
6th step is after aerator 10 and pressure sensor 11 arrive the preceding paragraph aeration layer simultaneously, PLC programmable controller 1 starts the aeration of a new round automatically according to the K value preset in advance and aeration time, with this repeatedly, the automatic aeration work of whole aeration layer is finally completed.
Introduce the automatic aeration control system based on multisection type aerating system below further.Fig. 2 is the automatic aeration control system schematic diagram that the present invention is based on multisection type aerating system.As shown in Figure 2, according to embodiments of the invention, the automatic aeration control system based on multisection type aerating system comprises: automaton and aerator.
Automaton comprises: PLC programmable controller 1, transmitter 2, frequency converter 3, aerator 4, on carry device 8 and baroceptor 11.
PLC programmable controller 1 respectively with one end of transmitter 2, on carry device 8 one end of one end and frequency converter 3 be connected, the other end of transmitter 2 is connected with baroceptor 11, on carry device 8 the other end be connected with aerator, the other end of frequency converter 3 is connected with one end of aerator 4, and the other end of aerator 4 is connected with the air injection pipe of aerator.
Aerator comprises: sealing device 10, air injection pipe and aeration tube 13, sealing device 10 comprises the first sealing device and the second sealing device, the upper end of the first sealing device with on carry device 8 and be connected, first sealing device is socketed in air injection pipe, the upper end of air injection pipe is connected by pipeline with one end of aerator 4, preferably, air injection pipe is polyvinyl chloride (PVC) pipe, and lower end is connected with the upper end of aeration tube 13 through the first sealing device.The upper end of aeration tube 13 is connected with the lower end of air injection pipe, and the lower end of aeration tube 13 is connected with the second sealing device.In the present embodiment, the lower end of aeration tube 13 and the upper base grafting of the second sealing device.Preferably, aeration tube 13 comprises aeration vertical tube and aeration branch pipe, and aeration vertical tube is provided with multiple body hole, body hole is connected with aeration branch pipe, in an inclination angle between aeration branch pipe and aeration vertical tube.Preferably, inclination angle is 30-45 degree.Aeration vertical tube is polyvinyl chloride (PVC) pipe, and aeration branch pipe is polyvinyl chloride (PVC) pipe.
Wherein, first sealing device and the second sealing device are arranged at above and below in aeration well respectively, first sealing device and the second sealing device and the aeration well borehole wall 9 form an enclosure space, and baroceptor 11 is arranged in enclosure space through the first sealing device by connecting line.
The enclosure space that first sealing device and the second sealing device and the aeration well borehole wall are formed mainly plays airtight injection air, controls its effect in target area release.
Preferably, multisection type soil in-situ aerating system also comprises magnetic valve 5, and magnetic valve 5 is arranged on the pipeline between the upper end of air injection pipe and aerator 4, and is connected with PLC programmable controller 1, and magnetic valve 5 is for cutting off or being communicated with air injection pipe.
Preferably, multisection type soil in-situ aerating system also comprises Pressure gauge 6, and Pressure gauge 6 is arranged on the pipeline between the upper end of air injection pipe and aerator 4, and Pressure gauge 6 is for the output pressure of Real-Time Monitoring aerator 4.
Preferably, multisection type soil in-situ aerating system also comprises flowmeter 7, and flowmeter 7 is arranged on the pipeline between the upper end of air injection pipe and aerator 4, and flowmeter 7 is for the output flow of Real-Time Monitoring aerator 4.
In embodiments of the present invention, magnetic valve 5, Pressure gauge 6 and flowmeter 7 can be separately set on the pipeline between the upper end of air injection pipe and aerator 4, also can combinationally use, the pipeline namely between the upper end of air injection pipe and aerator 4 be provided with magnetic valve 5 and/or Pressure gauge 6 and/or flowmeter 7.
Preferably, the first sealing device and the second sealing device are circular platform type, and side is provided with spring steel plate bracing or strutting arrangement; The making material of the first sealing device and the second sealing device comprises urethane rubber materials.In the present embodiment, the first sealing device comprises upper base, goes to the bottom and side; The upper base of the first sealing device is that cylinder is ring-like, first sealing device go to the bottom as cylinder is ring-like, the top of the side of the first sealing device is connected with the edges close of the upper base of the first sealing device, the bottom of the side of the first sealing device is connected with the edges close of going to the bottom of the first sealing device, and the overall diameter of going to the bottom of the first sealing device is matched with the internal diameter of aeration well.Second sealing device comprises upper base, goes to the bottom and side; The upper base of the second sealing device is column type, second sealing device go to the bottom as cylinder is ring-like, the top of the side of the second sealing device is connected with the edges close of the upper base of the second sealing device, the bottom of the side of the second sealing device is connected with the edges close of going to the bottom of the second sealing device, and the overall diameter of going to the bottom of the second sealing device is matched with the internal diameter of aeration well.Distance between the bottom of the first sealing device and the top of the second sealing device is 0.5 ~ 1.0m.
In the present embodiment, the side of the first sealing device is provided with bracing or strutting arrangement; Bracing or strutting arrangement comprises multi-disc spring steel plate, and multi-disc spring steel plate is respectively around outside the side being attached at the first sealing device, and the two ends up and down of multi-disc spring steel plate are connected to the upper base of the first sealing device and go to the bottom.The side of the second sealing device is provided with bracing or strutting arrangement; Bracing or strutting arrangement comprises multi-disc spring steel plate, and multi-disc spring steel plate is respectively around outside the side being attached at the second sealing device, and the two ends up and down of multi-disc spring steel plate are connected to the upper base of the second sealing device and go to the bottom.
The radius of the upper base of sealing device 10 is 1/2 ~ 3/4 of the radius of aeration well well casing, and thickness is 3 ~ 5cm; The outer shroud radius of going to the bottom is the radius of aeration well well casing, and the inner ring radius of going to the bottom is 1/2 ~ 3/4 of the radius of aeration well well casing, and thickness is 3 ~ 5cm; The top of side and bottom upper base and to go to the bottom compact siro spinning technology respectively, the thickness of side be upper base or go to the bottom 3/4 ~ 4/5 of thickness, width is 3 ~ 5cm.
In the present embodiment, the upper base of sealing device 10 is polyurethane rubber cylinder, and its radius is 1/2 of the radius of aeration well well casing, and thickness is 3cm; Go to the bottom as polyurethane rubber cylinder ring, outer shroud radius is aeration well well casing radius, and inner ring radius is aeration well well casing radius 1/2, and thickness is 3cm; Side is polyurethane rubber sheet, and thickness is the cylinder ring thickness 3/4 of going to the bottom, and width is 3cm, and the top of side and bottom are respectively with upper base with to go to the bottom compact siro spinning technology.
Bracing or strutting arrangement comprises 6 ~ 10 spring steel plates, and spring steel plate is isosceles trapezoid, and the height of spring steel plate is 3 ~ 5cm, and upper base width is 0.5 ~ 1cm, and width of going to the bottom is 1 ~ 2cm, and spring steel plate is equidistantly laid in the outside of the side of sealing device.
In the present embodiment, spring steel plate upper base and go to the bottom respectively with the polyurethane rubber seal end and to go to the bottom compact siro spinning technology beyond the Great Wall, and be equidistantly laid in the outside of polyurethane rubber sheet around polyurethane rubber seal plug side.
The radius of air injection pipe is 1/4 ~ 3/8 of the radius of aeration well well casing, and thickness is 3 ~ 5mm.
Aeration vertical tube non-equidistant lays six calandria holes, and the central angle corresponding to arc tube wall between adjacent two calandria holes is 60 °, and the radius of body hole is 1 ~ 3mm.Between aeration branch pipe and aeration vertical tube, inclination angle is 30 ~ 45 °, and aeration branch pipe end-to-end distance is 1/2 ~ 2/3 of the spacing of aeration vertical tube and aeration well well casing from the distance of aeration vertical tube.Like this, air is once enter after aerating system through air injection tube, and compressed air can only outwards spread through aeration branch pipe and then carry out aeration to soil media 12, and can not reverse flow, reenters aerating system, effectively reduces the energy consumption of air Injection equipment.
In the present embodiment, every calandria hole is laid along the bus non-equidistant of aeration vertical tube, distance d=[L/ (n+1)] × [i/ (i+1)] from the bottom to top between i-th and the i-th+1 hole, wherein n is every calandria numbers of hole, and L is the length of aeration vertical tube.Like this, can effectively avoid reducing the uneven problem of caused aeration from top to bottom gradually owing to injecting air pressure.
In sum, according to technical scheme of the present invention, one, this system can realize Automated condtrol.Can according to the infiltrative difference of soil media, by on-line monitoring and digitized signal conversion, auto-changing aeration pressure and aeration time carry out aeration, thus realize the normal running continuously of whole aerator, finally realize the removal of pollutant in soil.Its two, this system aeration is even.Adopt the design of interim aeration from the bottom to top effectively can avoid the problem being difficult to uniform aeration caused because soil media is heterogeneous, aerating system adopts the design of non-equidistant perforate can solve because injection air pressure reduces the uneven problem of caused aeration from top to bottom gradually in addition.Its three, this system air injection device energy consumption is low.Owing to have employed the design of aeration branch pipe, make air once enter after aerating system through air injection tube, compressed air can only outwards spread through aeration branch pipe and then carry out aeration to soil media, and can not reverse flow, reenter aerating system, so just effectively reduce the energy consumption of air Injection equipment.Its four, this Dynamic System is flexible.Aeration time and the aeration number of times of needs of each stage can be controlled by the concentration of volatile organic contaminant in monitoring soil during practical engineering application, thus reach the object of full and uniform aeration, improve the removal efficiency of pollutant.
Device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying performing creative labour, are namely appreciated that and implement.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. based on an automatic aeration control method for multisection type aerating system, it is characterized in that, it comprises the following steps and order:
Aerator is positioned over the bottom aeration interval of aeration well, frequency converter and magnetic valve receive the control signal of PLC, control aerator by described aerator to aeration in the aeration interval of described bottom, in aeration process, the air pressure control signal in the aeration interval of described bottom is sent to described PLC programmable controller by transmitter by baroceptor in real time;
The air pressure control signal that the described pressure sensor that described PLC programmable controller requires according to the aeration Stress control of described bottom aeration interval and receives sends, export and control signal to described frequency converter and described magnetic valve accordingly, aerator described in described frequency converter and described solenoid control by described aerator to aeration in the aeration interval of described bottom, to ensure that the pressure in the aeration interval of described bottom reaches the default aeration pressure of described bottom aeration interval, and maintain described aeration pressure continual and steady aeration in default aeration time;
After arriving described default aeration time, described PLC programmable controller outputs control signals to carries device, realizes the last layer aeration interval described aerator and described baroceptor simultaneously upwards carried to described bottom aeration interval;
After described aerator and described pressure sensor arrive described last layer aeration interval simultaneously, described PLC programmable controller starts the aeration of a new round automatically according to the aeration pressure corresponding with described one deck aeration interval preset in advance and aeration time, with this repeatedly, the aeration work of all aeration intervals in described aeration well is finally completed.
2., as claimed in claim 1 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, before carry out step 1, further comprising the steps of:
By the coefficient of permeability K value of the PLC control panel on described PLC programmable controller by soil in each described aeration interval, described PLC programmable controller is inputed to successively to upper strata aeration interval according to by described bottom aeration interval, so that described K value is changed into aeration pressure needed for each described aeration interval by the operation program preset by described PLC programmable controller, and arranges the default aeration pressure of each described aeration interval;
The aeration time of each described aeration interval is inputed to described PLC programmable controller;
After described aerator often being completed the aeration of an aeration interval, by the distance input extremely described PLC programmable controller above carried.
3., as claimed in claim 1 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described control signal is 4 ~ 20mA signal.
4. as claimed in claim 1 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator comprises: the first sealing device and the second sealing device, described first sealing device and described second sealing device are circular platform type, and side is provided with spring steel plate bracing or strutting arrangement;
The making material of described first sealing device and described second sealing device comprises urethane rubber materials.
5. as claimed in claim 4 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator comprises: aeration tube, described aeration tube comprises aeration vertical tube, described aeration vertical tube is provided with multiple body hole, described body hole is connected with aeration branch pipe, in an inclination angle between described aeration branch pipe and described aeration vertical tube.
6. as claimed in claim 5 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator comprises: air injection pipe, described air injection pipe is polyvinyl chloride (PVC) pipe, and the lower end of described air injection pipe is connected with the upper end of described aeration tube through described first sealing device.
7. as claimed in claim 6 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator also comprises: magnetic valve, described magnetic valve is arranged on the pipeline between the upper end of described air injection pipe and aerator, and be connected with described PLC programmable controller, for cutting off or being communicated with described air injection pipe.
8. as claimed in claim 6 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator also comprises: Pressure gauge, described Pressure gauge is arranged on the pipeline between the upper end of described air injection pipe and aerator, for the output pressure of aerator described in Real-Time Monitoring.
9. as claimed in claim 6 based on the automatic aeration control method of multisection type aerating system, it is characterized in that, described aerator also comprises: flowmeter, described flowmeter is arranged on the pipeline between the upper end of described air injection pipe and aerator, for the output flow of aerator described in Real-Time Monitoring.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107297383A (en) * | 2017-08-17 | 2017-10-27 | 江阴市百顺科技有限公司 | A kind of automatic aeration control methods |
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| NO940884L (en) * | 1993-03-12 | 1994-09-13 | Millgard Environmental Corp | Device for air purification and device for in situ treatment of contaminated soil |
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