CN114951251A - Intelligent pesticide chemical field contaminated soil remediation device and remediation method - Google Patents
Intelligent pesticide chemical field contaminated soil remediation device and remediation method Download PDFInfo
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- CN114951251A CN114951251A CN202210679524.2A CN202210679524A CN114951251A CN 114951251 A CN114951251 A CN 114951251A CN 202210679524 A CN202210679524 A CN 202210679524A CN 114951251 A CN114951251 A CN 114951251A
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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
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
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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
- B09C1/08—Reclamation of contaminated soil chemically
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses an intelligent device and a method for restoring polluted soil in a pesticide chemical field, wherein the device comprises a device box, a chemical oxidation component, a thermal desorption component, an extraction component and a PLC (programmable logic controller); the device box is provided with a treatment box and a pollutant concentration detector, and the chemical oxidation assembly comprises a chemical box arranged on the device box and a liquid adding sprayer arranged in the device box and connected with the chemical box; the thermal desorption assembly comprises a movable plate clamped in the device box, an infrared heating rod arranged on the movable plate and a movable motor, wherein a movable lead screw is arranged on the movable plate, and the movable motor provides power for the movable lead screw; the extraction assembly comprises an adsorption box arranged on the side wall of the device box and an extraction pipe which is sleeved inside the infrared heating rod and is connected with the adsorption box, and the infrared heating rod is provided with an extraction hole; the PLC is electrically connected with each electric device respectively; the device has the advantages of reasonable structural design, low energy consumption, obvious contaminated site remediation effect and suitability for popularization and application.
Description
Technical Field
The invention relates to the technical field of chemical polluted site remediation, in particular to an intelligent pesticide chemical site polluted soil remediation device and a remediation method.
Background
China is a big country for producing pesticide raw materials, and waste residue/water and the like generated in the pesticide production process can cause site pollution due to poor management. The pesticide pollution site has the characteristics of long production history, high pollution degree, complex pollution components, outstanding peculiar smell problem and the like, has larger danger and higher risk compared with the common industrial pollution site, seriously threatens the human health and the ecological environment safety, and becomes a great soil environment problem to be solved urgently at present.
The pesticide chemical field is mainly polluted by organic matters, and ex-situ chemical oxidation and thermal desorption technologies are common technologies for treating the organically polluted soil under the condition of a low-permeability soil layer, but the conventional chemical oxidation technology has poor stirring uniformity, long maintenance period and low oxidation efficiency; the thermal desorption technology has high energy consumption, and the generated tail gas is easy to cause the secondary pollution problem, so the economical efficiency is poor.
Disclosure of Invention
Aiming at the technical problems, the invention provides an intelligent pesticide chemical pollution site repairing device and method combining chemical oxidation and thermal desorption technologies.
The technical scheme of the invention is as follows: an intelligent device for restoring polluted soil in a pesticide chemical field comprises a device box, a chemical oxidation component, a thermal desorption component, an extraction component and a PLC (programmable logic controller); the lower end of the device box is provided with a base, a treatment box fixedly connected with the base is sleeved in the device box, and the upper ends of two side walls of the treatment box are provided with feed holes; a trough communicated with the feeding hole is arranged on each of two sides of the upper end surface of the device box; a pollutant concentration detector is arranged at the upper end of the device box, and detection probes of the pollutant concentration detector are respectively positioned in the two material tanks;
the chemical oxidation assembly comprises a chemical box and liquid adding sprayers, the chemical box is connected to the upper end of the device box in a sliding and clamping mode, an electric heating plate is arranged inside the chemical box, the liquid adding sprayers are provided with a plurality of liquid adding sprayers, each liquid adding sprayer is uniformly distributed inside the two feeding holes and is connected with the chemical box through a guide pipe, and an electric control valve is arranged at the connection position;
the thermal desorption assembly comprises two moving plates, an infrared heating rod and two moving motors, the two moving plates are slidably clamped in the device box and located on two sides of the processing box, the upper end and the lower end of each moving plate are in threaded connection with moving screws rotationally clamped with the inner wall of the device box, the end parts of the moving screws penetrate through the side wall of the device box and are provided with connecting belt wheels, the connecting belt wheels on the two moving screws located on the same side of the device box are connected through a belt, the two moving motors are respectively arranged on two sides of the upper end face of the base, and the two moving motors respectively provide power for one of the moving screws on two sides of the device box; the infrared heating rods are provided with a plurality of infrared heating rods, the infrared heating rods are uniformly distributed on one side, close to the treatment box, of the two movable plates, and through holes corresponding to the infrared heating rods are arranged on the side wall of the treatment box in a penetrating mode;
the extraction assembly comprises two adsorption tanks and an extraction pipe, and the two adsorption tanks are respectively arranged on the front side wall and the rear side wall of the device box; the number of the extraction pipes is corresponding to the number of the infrared heating rods, each extraction pipe is movably sleeved inside each infrared heating rod, and a plurality of extraction holes communicated with the extraction pipes are formed in the upper side wall and the lower side wall of each infrared heating rod; each extraction pipe positioned at the two sides of the treatment box is respectively connected with the two adsorption boxes through a guide pipe, and suction pumps are arranged at the joints;
the PLC is respectively and electrically connected with an electric control valve of the pollutant concentration detector, an electric heating plate, an infrared heating rod, a mobile motor and a suction pump; the PLC is stored with a database of common restoration technical parameters of pesticide contaminated sites, the chemical oxidation and thermal desorption restoration technologies have respective starting conditions and corresponding technological parameter settings under different scenes, and if persulfate is adopted as a chemical oxidation medicament, the PLC can automatically adjust the heating temperature of the electric heating plate to 55-65 ℃; when the high manganese acid salt is used as a chemical oxidation agent, the PLC can automatically adjust the heating temperature of the electric heating plate to 15-25 ℃.
Furthermore, the upper end of the treatment box is open, a transfer net cage is movably clamped in the treatment box, a cover plate capable of being in sealing connection with the opening at the upper end of the treatment box is movably clamped at the upper end of the transfer net cage, and a groove for communicating a feed hole is formed in the side wall of the transfer net cage; by arranging the transfer net cage, the transfer backfilling of the repaired polluted soil is facilitated, and the soil repairing efficiency can be effectively improved.
Furthermore, a connecting box is arranged at the bottom in the transfer net cage, a plurality of hollow sleeves are vertically arranged on the upper end face of the connecting box, shaft levers are rotatably clamped in the hollow sleeves, the bottom end of each shaft lever penetrates through the connecting box and is provided with a connecting gear, each connecting gear is in chain transmission, a plurality of driving worm gears are sleeved on each shaft lever, a plurality of stirring rods are rotatably clamped on two sides of each hollow sleeve, each stirring rod is meshed and connected with the driving worm gears through worms, and one end, away from the hollow sleeves, of each stirring rod is rotatably clamped with the inner wall of the transfer net cage; a stirring motor is arranged in the base, and an output shaft of the stirring motor can be movably clamped with one shaft lever; the stirring motor is electrically connected with the PLC; through setting up the puddler, can chemical oxidation medicament and contaminated soil intensive mixing on the one hand, improve the chemical oxidation effect that pollutes soil, on the other hand can make contaminated soil be heated more evenly to improve the thermal desorption effect that pollutes soil.
Furthermore, gear boxes are arranged on two sides of the device box, and the two moving motors are respectively positioned in the two gear boxes; the safety of the invention can be improved by arranging the gear box.
Furthermore, crushing rollers which are meshed and connected through gears are arranged in pairs in the two material troughs, a crushing motor which provides power for the crushing rollers is arranged on the side wall of the device box, and the crushing motors are electrically connected with the PLC; the polluted soil can be crushed by the crushing roller, so that the difficulty in repairing the polluted soil is reduced.
Furthermore, one end of the extraction tube penetrates through the infrared heating rod, the other end of the extraction tube penetrates through the movable plate, and a return spring, one end of which is abutted against the inner wall of the movable plate, and the other end of which is clamped with the outer wall of the extraction tube, is sleeved on the extraction tube positioned in the movable plate; the outer wall of the extraction pipe is provided with an opening and closing sliding plate at the position corresponding to each extraction hole; after two movable plates on two sides of the inside of the device box are close to each other, the infrared heating rods on the two movable plates are in contact with each other, so that the two extraction pipes are abutted, the opening and closing sliding plate on the extraction pipe is separated from the extraction hole, the conduction of the extraction hole and the extraction pipe is realized, and the heat loss in the heating process of polluted soil is reduced.
Furthermore, each extraction hole is provided with a blocking filter screen; through setting up the separation filter screen, can avoid soil particles to get into and extract the hole and cause the jam of extracting the hole, improved the stability when the device moves.
Furthermore, the upper end and the lower end of the movable plate are rotatably clamped with guide rollers which can be clamped with the inner wall of the device box; through setting up the guide roller, stationarity when can improving the movable plate and remove to can realize the accurate butt joint of infrared heating stick and the through-hole on handling the case.
Furthermore, a lifting lug is arranged on the cover plate; the lifting lugs are used for facilitating lifting and transferring of the transferring net cage.
The invention also provides an intelligent pesticide chemical field polluted soil remediation method, and the intelligent pesticide chemical field polluted soil remediation device comprises the following steps:
s1, respectively connecting the pollutant concentration detector, the electric control valve, the electric heating plate, the infrared heating rod, the mobile motor and the suction pump with an external power supply; then injecting a chemical oxidation medicament into the medicament box, and controlling the opening of the electric heating plate through a PLC (programmable logic controller); finally, filling adsorbents into the two adsorption boxes;
s2, enabling the polluted soil to pass through the interior of the two trough injection device boxes, controlling the opening of a pollutant concentration monitoring instrument through a PLC (programmable logic controller), detecting the concentration of pollutants in the polluted soil by using the pollutant concentration monitoring instrument, controlling the opening of an electric control valve through the PLC when the concentration of the pollutants in the polluted soil is low, enabling the polluted soil to enter a treatment box through a feed hole, injecting a chemical oxidation agent into the polluted soil through a liquid adding nozzle, and performing chemical oxidation treatment on the pollutants in the polluted soil; discharging the polluted soil out of the device box after the chemical oxidation treatment is finished;
s3, when the concentration of pollutants in the polluted soil is high, the PLC controller controls the infrared heating rods and the moving motor to start, the moving motor drives the moving screw to rotate, the moving plate drives the infrared heating rods to penetrate through the through holes in the treatment box under the action of the moving screw and then inserts the infrared heating rods into the polluted soil, and the pollutants in the polluted soil are heated and desorbed;
and S4, controlling the suction pump to be started through the PLC, enabling the polluted gas desorbed from the polluted soil to sequentially pass through the extraction hole and the extraction pipe under the action of the suction pump and then enter the two adsorption boxes, and adsorbing the harmful substances in the polluted gas by using the activated carbon adsorbent filled in the adsorption boxes.
Compared with the prior art, the beneficial effects of the invention are embodied in the following points:
firstly, the device is reasonable in structural design, and the floor area of the device is reduced due to the integrated design; meanwhile, the method has higher stability and reliability, and the remediation efficiency of pesticide chemical polluted sites is obviously improved;
secondly, the device can detect the concentration of pollutants, intelligently adjust the repair technology and technological parameters according to the concentration, accurately identify and repair, reduce the cost and improve the repair effect;
thirdly, the device for repairing the pesticide chemical polluted site has the advantages of short repair period, low energy consumption and obvious repair effect, and effectively improves the safety utilization rate of the pesticide chemical polluted site.
Drawings
FIG. 1 is a longitudinal section of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view showing the internal structure of the apparatus case of the present invention;
FIG. 4 is a schematic view of the attachment of the crushing roller of the present invention to the processing tank;
FIG. 5 is a schematic view of the structure of the moving plate of the present invention;
FIG. 6 is a schematic view of the connection of an extraction tube of the present invention to an infrared heating rod;
FIG. 7 is an enlarged, fragmentary, schematic view taken at A of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic view of the connection of the hollow sleeve of the present invention to a junction box;
wherein, 1-device box, 10-base, 11-treatment box, 110-feeding hole, 12-trough, 13-gear box, 14-crushing roller, 140-crushing motor, 2-chemical oxidation component, 20-medicament box, 21-liquid adding nozzle, 22-electric heating plate, 3-thermal desorption component, 30-moving plate, 300-guide roller, 31-infrared heating rod, 32-moving motor, 33-moving screw, 330-connecting belt wheel, 4-extraction component, 40-adsorption box, 41-extraction pipe, 410-extraction hole, 411-reset spring, 412-open and close slide plate, 413-separation filter screen, 42-suction pump, 5-net cage transfer, 50-cover plate, 51-connecting box, 110-feeding hole, 12-trough, 13-gear box, 14-crushing roller, 3-chemical oxidation motor, 2-chemical oxidation component, 3-thermal desorption component, 3-moving plate, 3-infrared heating rod, 3-connecting belt wheel, 4-extraction component, 40-extraction pipe, 410-reset spring, 412-open and close slide plate, 413-separation filter screen, 42-suction pump, 5-net cage transfer box, 50-cover plate, 51-connecting box, and 5-connecting box, 52-hollow sleeve, 53-shaft lever, 530-driving worm wheel, 54-stirring rod, 540-worm and 55-stirring motor.
Detailed Description
Example 1
Example 1
As shown in fig. 1, the intelligent device for remedying the contaminated soil in the pesticide chemical field comprises a device box 1, a chemical oxidation component 2, a thermal desorption component 3, an extraction component 4 and a PLC (programmable logic controller); the lower end of the device box 1 is provided with a base 10, a treatment box 11 fixedly connected with the base 10 is sleeved in the device box, and the upper ends of two side walls of the treatment box 11 are provided with feed holes 110; a trough 12 communicated with the feed hole 110 is arranged on each of two sides of the upper end surface of the device box 1; a pollutant concentration detector is arranged at the upper end of the device box 1, and detection probes of the pollutant concentration detector are respectively arranged inside the two material tanks 12;
as shown in fig. 1 and 4, the chemical oxidation assembly 2 comprises a chemical tank 20 and liquid adding sprayers 21, the chemical tank 20 is slidably clamped at the upper end of the device box 1, an electric heating plate 22 is arranged inside the chemical tank 20, a plurality of liquid adding sprayers 21 are arranged, each liquid adding sprayer 21 is uniformly distributed inside two feeding holes 110, each liquid adding sprayer 21 is connected with the chemical tank 20 through a guide pipe, and an electric control valve is arranged at the connection position;
as shown in fig. 1, 3, 5, 6, and 7, the thermal desorption assembly 3 includes two moving plates 30, an infrared heating rod 31, and two moving motors 32, where the two moving plates 30 are slidably clamped inside the device box 1 and located at two sides of the processing box 11, the upper and lower ends of the two moving plates 30 are both in threaded connection with moving screws 33 rotatably clamped to the inner wall of the device box 1, the end of each moving screw 33 penetrates through the side wall of the device box 1 and is provided with a connecting belt pulley 330, the connecting belt pulleys 330 on the two moving screws 33 located at the same side of the device box 1 are connected by a belt, the two moving motors 32 are respectively located at two sides of the upper end surface of the base 10, and the two moving motors 32 respectively provide power for one of the moving screws 33 at two sides of the device box 1; the number of the infrared heating rods 31 is 40, the 40 infrared heating rods 31 are uniformly distributed on one side of the two moving plates 30 close to the treatment box 11, and through holes corresponding to the positions of the infrared heating rods 31 penetrate through the side wall of the treatment box 11;
as shown in fig. 1 and 2, the extraction assembly 4 includes two adsorption tanks 40 and an extraction pipe 41, the two adsorption tanks 40 are respectively disposed on the front and rear side walls of the apparatus box 1; the number of the extraction pipes 41 is consistent with that of the infrared heating rods 31, each extraction pipe 41 is movably sleeved inside each infrared heating rod 31, and the infrared heating rods 31 are provided with extraction holes 410 communicated with the extraction pipes 41; the extraction pipes 41 positioned at the two sides of the treatment box 11 are respectively connected with the two adsorption boxes 40 through guide pipes, and suction pumps 42 are arranged at the connection parts;
the PLC is respectively electrically connected with the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32 and the suction pump 42; the PLC, the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32 and the suction pump 42 are all commercially available products; the PLC is stored with a database of common restoration technical parameters of pesticide contaminated sites, the chemical oxidation and thermal desorption restoration technologies have respective starting conditions and corresponding technological parameter settings under different scenes, and if persulfate is adopted as a chemical oxidation medicament, the PLC can automatically adjust the heating temperature of the electric heating plate 22 to 55 ℃; if the salt of gachonic acid is used as the chemical oxidizing agent, the PLC controller can automatically adjust the heating temperature of the electric heating plate 22 to 15 ℃.
Example 2
The intelligent pesticide chemical industry contaminated site repairing method described in this embodiment is an intelligent pesticide chemical industry contaminated site repairing device based on embodiment 1, and includes the following steps:
s1, respectively connecting the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32 and the suction pump 42 with an external power supply; then, injecting a sodium persulfate solution with the volume concentration of 8% into the chemical box 20, and controlling the electric heating plate 22 to be opened through a PLC (programmable logic controller); finally, filling the two adsorption tanks 40 with commercially available activated carbon adsorbents; the PLC automatically starts the electric heating plate to heat to 55 ℃;
s2, injecting the polluted soil into the device box 1 through the two material grooves 12, controlling the pollutant concentration monitoring instrument to be started through the PLC, detecting the pollutant concentration in the polluted soil through the pollutant concentration monitoring instrument, controlling the electric control valve to be started through the PLC when the pollutant concentration is less than 5 times of a soil pollutant concentration screening value according to GB36600-2018 soil environmental quality construction land soil pollution risk control standard, and injecting a chemical oxidation agent into the polluted soil through the liquid adding spray head 21 in the process that the polluted soil enters the treatment box 11 through the feed hole 110 to perform chemical oxidation treatment on the pollutants in the polluted soil; after the chemical oxidation treatment is finished, discharging the polluted soil out of the device box 1;
s3, when the concentration of the pollutants in the polluted soil is higher than the soil pollutant concentration screening value which is 5 times higher than the pollutant concentration screening value, the PLC is used for controlling the infrared heating rods 31 and the movable motor 32 to be started, the movable motor 32 drives the movable lead screw 33 to rotate, the movable plate 30 drives the infrared heating rods 31 to penetrate through the through holes in the treatment box 11 and then to be inserted into the polluted soil under the action of the movable lead screw 33, heating desorption treatment is carried out on the pollutants in the polluted soil, and the heating temperature of the infrared heating rods 31 is controlled to be 100 ℃;
and S4, controlling the suction pump 42 to be started through the PLC, enabling the polluted gas desorbed from the polluted soil to sequentially pass through the extraction holes 410 and the extraction pipes 41 under the action of the suction pump 42 and then enter the two adsorption tanks 40, and adsorbing the harmful substances in the polluted gas by using the activated carbon adsorbent filled in the adsorption tanks 40.
Example 3
As shown in fig. 1, 3 and 8, the intelligent device for remedying the contaminated soil in the pesticide chemical field comprises a device box 1, a chemical oxidation component 2, a thermal desorption component 3, an extraction component 4 and a PLC controller; the lower end of the device box 1 is provided with a base 10, a treatment box 11 fixedly connected with the base 10 is sleeved in the device box, and the upper ends of two side walls of the treatment box 11 are provided with feed holes 110; a trough 12 communicated with the feed hole 110 is arranged on each of two sides of the upper end surface of the device box 1; a pollutant concentration detector is arranged at the upper end of the device box 1, and detection probes of the pollutant concentration detector are respectively arranged inside the two material tanks 12; the upper end of the processing box 11 is open, a transfer net cage 5 is movably clamped in the processing box 11, a cover plate 50 capable of being hermetically connected with the opening at the upper end of the processing box 11 is movably clamped at the upper end of the transfer net cage 5, and a groove communicated with a feed hole 110 is formed in the side wall of the transfer net cage 5; a connecting box 51 is arranged at the bottom in the transfer net cage 5, 3 hollow sleeves 52 are vertically arranged on the upper end face of the connecting box 51, shaft rods 53 are rotatably clamped in the hollow sleeves 52, the bottom end of each shaft rod 53 penetrates through the connecting box 51 and is provided with connecting gears, the connecting gears are in chain transmission, 4 driving worm wheels 530 are sleeved on the shaft rods 53, 4 stirring rods 54 are rotatably clamped on two sides of each hollow sleeve 52, each stirring rod 54 is meshed and connected with the driving worm wheels 530 through a worm 540, and one end, far away from the hollow sleeve 52, of each stirring rod 54 is rotatably clamped with the inner wall of the transfer net cage 5; a stirring motor 55 is arranged in the base 10, and an output shaft of the stirring motor 55 can be movably clamped with one shaft lever 53;
as shown in fig. 1 and 4, the chemical oxidation assembly 2 comprises a chemical tank 20 and liquid adding sprayers 21, the chemical tank 20 is slidably clamped at the upper end of the device box 1, an electric heating plate 22 is arranged inside the chemical tank 20, a plurality of liquid adding sprayers 21 are arranged, each liquid adding sprayer 21 is uniformly distributed inside two feeding holes 110, each liquid adding sprayer 21 is connected with the chemical tank 20 through a guide pipe, and an electric control valve is arranged at the connection position;
as shown in fig. 1, 3, 5, 6, and 7, the thermal desorption assembly 3 includes two moving plates 30, an infrared heating rod 31, and two moving motors 32, where the two moving plates 30 are slidably clamped inside the device box 1 and located at two sides of the processing box 11, the upper and lower ends of the two moving plates 30 are both in threaded connection with moving screws 33 rotatably clamped to the inner wall of the device box 1, the end of each moving screw 33 penetrates through the side wall of the device box 1 and is provided with a connecting belt pulley 330, the connecting belt pulleys 330 on the two moving screws 33 located at the same side of the device box 1 are connected by a belt, the two moving motors 32 are respectively located at two sides of the upper end surface of the base 10, and the two moving motors 32 respectively provide power for one of the moving screws 33 at two sides of the device box 1; the number of the infrared heating rods 31 is 40, the 40 infrared heating rods 31 are uniformly distributed on one side of the two moving plates 30 close to the treatment box 11, and through holes corresponding to the positions of the infrared heating rods 31 penetrate through the side wall of the treatment box 11;
as shown in fig. 1 and 2, the extraction assembly 4 includes two adsorption tanks 40 and an extraction pipe 41, the two adsorption tanks 40 are respectively disposed on the front and rear side walls of the apparatus box 1; the number of the extraction pipes 41 corresponds to the number of the infrared heating rods 31, each extraction pipe 41 is movably sleeved inside each infrared heating rod 31, and the upper and lower side walls of each infrared heating rod 31 are provided with 3 extraction holes 410 communicated with the extraction pipes 41; the extraction pipes 41 positioned at the two sides of the treatment box 11 are respectively connected with the two adsorption boxes 40 through guide pipes, and suction pumps 42 are arranged at the connection parts; one end of the extraction tube 41 penetrates through the infrared heating rod 31, the other end of the extraction tube 41 penetrates through the movable plate 30, and a return spring 411, one end of which is abutted against the inner wall of the movable plate 30, and the other end of which is clamped with the outer wall of the extraction tube 41, is sleeved on the extraction tube 41 positioned in the movable plate 30; the opening and closing sliding plate 412 is arranged on the outer wall of the extraction pipe 41 corresponding to the position of each extraction hole 410; each extraction hole 410 is provided with a separation filter screen 413;
the PLC is respectively and electrically connected with the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the moving motor 32, the suction pump 42 and the stirring motor 55; the PLC, the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32, the suction pump 42 and the stirring motor 55 are all commercially available products; the PLC is stored with a database of common restoration technical parameters of pesticide contaminated sites, the chemical oxidation and thermal desorption restoration technologies have respective starting conditions and corresponding technological parameter settings under different scenes, and if persulfate is adopted as a chemical oxidation medicament, the PLC can automatically adjust the heating temperature of the electric heating plate 22 to 60 ℃; if the salt of gachonic acid is used as the chemical oxidizing agent, the PLC controller can automatically adjust the heating temperature of the electric heating plate 22 to 20 ℃.
Example 4
The intelligent pesticide chemical industry contaminated site repairing method described in this embodiment is an intelligent pesticide chemical industry contaminated site repairing device based on embodiment 3, and includes the following steps:
s1, respectively connecting the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32 and the suction pump 42 with an external power supply; then injecting a potassium permanganate solution with the volume concentration of 25% into the medicament box 20, controlling the electric heating plate 22 to be opened through a PLC controller, and finally filling commercially available activated carbon adsorbents into the two adsorption boxes 40; the PLC controller automatically starts the electric heating plate 22 to heat to 20 ℃;
s2, injecting the polluted soil into the device box 1 through the two material troughs 12, and enabling the polluted soil to enter the transfer net cage 5 through the feed hole 110; the method comprises the steps that a PLC is used for controlling a pollutant concentration monitoring instrument to be started, the pollutant concentration monitoring instrument is used for detecting the pollutant concentration in the polluted soil, according to GB36600-2018 soil environmental quality construction land soil pollution risk control standard, when the pollutant concentration is less than 5 times of a soil pollutant concentration screening value, an electric control valve is controlled to be started through the PLC, the polluted soil enters a treatment box 11 through a feeding hole 110, a chemical oxidizing agent is injected into the polluted soil through a liquid adding sprayer 21 to carry out chemical oxidation treatment on the pollutant in the polluted soil, meanwhile, a stirring motor 55 is controlled to be started through the PLC, and the stirring motor 55 is used for driving each shaft rod 53 to rotate, so that each stirring rod 54 rotates to stir the soil; after the chemical oxidation treatment is finished, discharging the polluted soil out of the device box 1;
s3, when the concentration of the pollutants in the polluted soil is higher than the soil pollutant concentration screening value which is 5 times higher than the pollutant concentration screening value, the PLC controls the infrared heating rods 31 and the moving motor 32 to be started, the moving motor 32 drives the moving screw 33 to rotate, the moving plate 30 drives the infrared heating rods 31 to penetrate through the through holes in the processing box 11 and then to be inserted into the polluted soil under the action of the moving screw 33, and the pollutants in the polluted soil are heated and desorbed; controlling the heating temperature of the infrared heating rod 31 to be 550 ℃; meanwhile, when the two moving plates 30 approach each other, the infrared heating rods 31 on the two moving plates 30 contact each other, so that the two extraction tubes 41 abut against each other, the opening and closing sliding plate 412 on the extraction tube 41 is separated from the extraction hole 410, and the conduction between the extraction hole 410 and the extraction tube 41 is realized;
s4, controlling the suction pump 42 to be started through the PLC, enabling the polluted gas desorbed from the polluted soil to sequentially pass through the extraction holes 410 and the extraction pipes 41 under the action of the suction pump 42 and then enter the two adsorption boxes 40, and adsorbing harmful substances in the polluted gas by using the activated carbon adsorbent filled in the adsorption boxes 40; after the polluted soil is repaired, the transferring net cage 5 is transferred from the treatment box 11 by using external hoisting equipment.
Example 5
As shown in fig. 1, 3 and 8, the intelligent device for remedying the contaminated soil in the pesticide chemical field comprises a device box 1, a chemical oxidation component 2, a thermal desorption component 3, an extraction component 4 and a PLC controller; the lower end of the device box 1 is provided with a base 10, a treatment box 11 fixedly connected with the base 10 is sleeved in the device box, and the upper ends of two side walls of the treatment box 11 are provided with feed holes 110; a trough 12 communicated with the feed hole 110 is arranged on each of two sides of the upper end surface of the device box 1; a pollutant concentration detector is arranged at the upper end of the device box 1, and detection probes of the pollutant concentration detector are respectively arranged inside the two material tanks 12; the crushing rollers 14 which are meshed and connected through gears are arranged in pairs in the two material troughs 12, and the side wall of the device box 1 is provided with a crushing motor 140 which provides power for the crushing rollers 14; the upper end of the treatment box 11 is open, a transfer net cage 5 is movably clamped in the treatment box 11, a cover plate 50 capable of being in sealing connection with the opening at the upper end of the treatment box 11 is movably clamped at the upper end of the transfer net cage 5, a lifting lug is arranged on the cover plate 50, and a notch communicated with a feed hole 110 is formed in the side wall of the transfer net cage 5; a connecting box 51 is arranged at the bottom in the transfer net cage 5, 3 hollow sleeves 52 are vertically arranged on the upper end face of the connecting box 51, shaft rods 53 are rotatably clamped in the hollow sleeves 52, the bottom end of each shaft rod 53 penetrates through the connecting box 51 and is provided with connecting gears, the connecting gears are in chain transmission, 4 driving worm wheels 530 are sleeved on the shaft rods 53, 4 stirring rods 54 are rotatably clamped on two sides of each hollow sleeve 52, each stirring rod 54 is meshed and connected with the driving worm wheels 530 through a worm 540, and one end, far away from the hollow sleeve 52, of each stirring rod 54 is rotatably clamped with the inner wall of the transfer net cage 5; a stirring motor 55 is arranged in the base 10, and an output shaft of the stirring motor 55 can be movably clamped with one shaft lever 53;
as shown in fig. 1 and 4, the chemical oxidation assembly 2 comprises a chemical tank 20 and liquid adding sprayers 21, the chemical tank 20 is slidably clamped at the upper end of the device box 1, an electric heating plate 22 is arranged inside the chemical tank 20, a plurality of liquid adding sprayers 21 are arranged, each liquid adding sprayer 21 is uniformly distributed inside two feeding holes 110, each liquid adding sprayer 21 is connected with the chemical tank 20 through a guide pipe, and an electric control valve is arranged at the connection position;
as shown in fig. 1, 3, 5, 6 and 7, the thermal desorption assembly 3 includes two moving plates 30, two infrared heating rods 31 and two moving motors 32, the two moving plates 30 are slidably clamped inside the apparatus box 1 and located at two sides of the processing box 11, and the upper and lower ends of the moving plates 30 are rotatably clamped with guide rollers 300 capable of being clamped with the inner wall of the apparatus box 1; the upper end and the lower end of each of the two moving plates 30 are in threaded connection with a moving screw 33 rotationally clamped with the inner wall of the device box 1, the end part of each moving screw 33 penetrates through the side wall of the device box 1 and is provided with a connecting belt wheel 330, the connecting belt wheels 330 on the two moving screws 33 positioned on the same side of the device box 1 are connected through a belt, two moving motors 32 are respectively arranged on two sides of the upper end face of the base 10, and the two moving motors 32 respectively provide power for one moving screw 33 on two sides of the device box 1; the number of the infrared heating rods 31 is 40, the 40 infrared heating rods 31 are uniformly distributed on one side of the two moving plates 30 close to the treatment box 11, and through holes corresponding to the positions of the infrared heating rods 31 penetrate through the side wall of the treatment box 11; the two sides of the device box 1 are respectively provided with a gear box 13, and the two moving motors 32 are respectively positioned in the two gear boxes 13;
as shown in fig. 1, 2 and 6, the extraction assembly 4 includes two adsorption tanks 40 and an extraction pipe 41, the two adsorption tanks 40 are respectively disposed on the front and rear side walls of the apparatus box 1; the number of the extraction pipes 41 corresponds to the number of the infrared heating rods 31, each extraction pipe 41 is movably sleeved inside each infrared heating rod 31, and the upper and lower side walls of each infrared heating rod 31 are provided with 3 extraction holes 410 communicated with the extraction pipes 41; the extraction pipes 41 positioned at the two sides of the treatment box 11 are respectively connected with the two adsorption boxes 40 through guide pipes, and suction pumps 42 are arranged at the connection parts; one end of the extraction tube 41 penetrates through the infrared heating rod 31, the other end of the extraction tube 41 penetrates through the movable plate 30, and a return spring 411, one end of which is abutted against the inner wall of the movable plate 30, and the other end of which is clamped with the outer wall of the extraction tube 41, is sleeved on the extraction tube 41 positioned in the movable plate 30; the opening and closing sliding plate 412 is arranged on the outer wall of the extraction pipe 41 corresponding to the position of each extraction hole 410; each extraction hole 410 is provided with a separation filter screen 413;
the PLC is respectively and electrically connected with the pollutant concentration detector, the crushing motor 140, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the moving motor 32, the suction pump 42 and the stirring motor 55; the PLC, the pollutant concentration detector, the crushing motor 140, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the moving motor 32, the suction pump 42 and the stirring motor 55 are all commercially available products; the PLC is stored with a database of common restoration technical parameters of pesticide contaminated sites, the chemical oxidation and thermal desorption restoration technologies have respective starting conditions and corresponding technological parameter settings under different scenes, and if persulfate is adopted as a chemical oxidation medicament, the PLC can automatically adjust the heating temperature of the electric heating plate 22 to 65 ℃; if the salt of gachonic acid is used as the chemical oxidizing agent, the PLC controller can automatically adjust the heating temperature of the electric heating plate 22 to 25 ℃.
Example 6
The intelligent pesticide chemical industry contaminated site repairing method described in this embodiment is an intelligent pesticide chemical industry contaminated site repairing device based on embodiment 5, and includes the following steps:
s1, respectively connecting the pollutant concentration detector, the electric control valve, the electric heating plate 22, the infrared heating rod 31, the mobile motor 32 and the suction pump 42 with an external power supply; then, injecting a potassium persulfate solution with the volume concentration of 25% into the chemical box 20, and controlling the electric heating plate 22 to be opened through a PLC (programmable logic controller); finally, filling the two adsorption tanks 40 with commercially available activated carbon adsorbents; the PLC controller automatically starts the electric heating plate 22 to heat to 65 ℃;
s2, injecting the polluted soil into the device box 1 through the two material troughs 12, and enabling the polluted soil to enter the transfer net cage 5 through the feed hole 110; the method comprises the steps of controlling a pollutant concentration monitoring instrument to be started through a PLC, detecting the pollutant concentration in the polluted soil through the pollutant concentration monitoring instrument, controlling an electric control valve to be started through the PLC when the pollutant concentration is less than 5 times of a soil pollutant concentration screening value according to GB36600-2018 soil environmental quality construction land soil pollution risk control standard, enabling the polluted soil to enter a treatment box 11 through a feed hole 110 in the process, injecting a chemical oxidation agent into the polluted soil through a liquid adding sprayer 21, carrying out chemical oxidation treatment on pollutants in the polluted soil, controlling a crushing motor 140 and a stirring motor 55 to be started through the PLC, enabling the polluted soil to enter a transfer net cage 5 through the feed hole 110, firstly crushing the polluted soil by a crushing roller 14, and finally driving each shaft rod 53 to rotate through the stirring motor 55 so as to enable each stirring rod 54 to rotate, stirring the soil; after the chemical oxidation treatment is finished, discharging the polluted soil out of the device box 1;
s3, when the concentration of the pollutants in the polluted soil is higher than the soil pollutant concentration screening value which is 5 times higher than the pollutant concentration screening value, the PLC controls the infrared heating rods 31 and the moving motor 32 to be started, the moving motor 32 drives the moving screw 33 to rotate, the moving plate 30 drives the infrared heating rods 31 to penetrate through the through holes in the processing box 11 and then to be inserted into the polluted soil under the action of the moving screw 33, and the pollutants in the polluted soil are heated and desorbed; controlling the heating temperature of the infrared heating rod 31 to be 750 ℃; meanwhile, when the two moving plates 30 approach each other, the infrared heating rods 31 on the two moving plates 30 contact each other, so that the two extraction tubes 41 abut against each other, the opening and closing sliding plate 412 on the extraction tube 41 is separated from the extraction hole 410, and the conduction between the extraction hole 410 and the extraction tube 41 is realized;
s4, controlling the suction pump 42 to be started through the PLC, enabling the polluted gas desorbed from the polluted soil to sequentially pass through the extraction holes 410 and the extraction pipes 41 under the action of the suction pump 42 and then enter the two adsorption boxes 40, and adsorbing harmful substances in the polluted gas by using the activated carbon adsorbent filled in the adsorption boxes 40; after the polluted soil is repaired, the transferring net cage 5 is transferred from the treatment box 11 by using external hoisting equipment.
Claims (10)
1. An intelligent device for restoring polluted soil in a pesticide chemical field is characterized by comprising a device box (1), a chemical oxidation component (2), a thermal desorption component (3), an extraction component (4) and a PLC (programmable logic controller); the device is characterized in that a base (10) is arranged at the lower end of the device box (1), a treatment box (11) fixedly connected with the base (10) is sleeved in the device box, and feeding holes (110) are formed in the upper ends of two side walls of the treatment box (11); both sides of the upper end surface of the device box (1) are provided with material troughs (12) communicated with the material inlet holes (110); a pollutant concentration detector is arranged at the upper end of the device box (1), and detection probes of the pollutant concentration detector are respectively arranged in the two material tanks (12);
the chemical oxidation assembly (2) comprises a chemical box (20) and liquid adding sprayers (21), the chemical box (20) is clamped at the upper end of the device box (1) in a sliding mode, an electric heating plate (22) is arranged inside the chemical box (20), a plurality of liquid adding sprayers (21) are arranged, each liquid adding sprayer (21) is uniformly distributed inside two feeding holes (110), each liquid adding sprayer (21) is connected with the chemical box (20) through a guide pipe, and an electric control valve is arranged at the connection position;
the thermal desorption component (3) comprises a moving plate (30), an infrared heating rod (31) and a moving motor (32), the two moving plates (30) and the two moving motors (32) are arranged, the two moving plates (30) are clamped in the device box (1) in a sliding way, and are positioned at the two sides of the processing box (11), the upper and lower ends of the two moving plates (30) are in threaded connection with moving screw rods (33) which are rotationally clamped with the inner wall of the device box (1), the end parts of the moving screw rods (33) penetrate through the side wall of the device box (1), and are provided with connecting belt wheels (330), the connecting belt wheels (330) on the two movable screw rods (33) positioned at the same side of the device box (1) are connected through a belt, two movable motors (32) are respectively arranged at two sides of the upper end surface of the base (10), the two moving motors (32) respectively provide power for one of the moving screw rods (33) on two sides of the device box (1); the infrared heating rods (31) are arranged in a plurality, each infrared heating rod (31) is uniformly distributed on one side, close to the treatment box (11), of the two moving plates (30), and through holes corresponding to the infrared heating rods (31) in position penetrate through the side wall of the treatment box (11);
the extraction assembly (4) comprises two adsorption tanks (40) and extraction pipes (41), the two adsorption tanks (40) are respectively arranged on the front side wall and the rear side wall of the device box (1), the number of the extraction pipes (41) is correspondingly consistent with that of the infrared heating rods (31), each extraction pipe (41) is movably sleeved inside each infrared heating rod (31), and a plurality of extraction holes (410) communicated with the extraction pipes (41) are respectively arranged on the upper side wall and the lower side wall of each infrared heating rod (31); each extraction pipe (41) positioned at the two sides of the treatment box (11) is respectively connected with the two adsorption boxes (40) through a guide pipe, and a suction pump (42) is arranged at the connection part;
the PLC is respectively and electrically connected with the pollutant concentration detector, the electric control valve, the electric heating plate (22), the infrared heating rod (31), the mobile motor (32) and the suction pump (42).
2. The intelligent device for remediating the contaminated soil in the pesticide chemical field as claimed in claim 1, wherein the upper end of the treatment box (11) is open, the inside of the treatment box (11) is movably clamped with the transfer net cage (5), the upper end of the transfer net cage (5) is movably clamped with a cover plate (50) which can be hermetically connected with the upper end opening of the treatment box (11), and the side wall of the transfer net cage (5) is provided with a groove for communicating the feed hole (110).
3. The intelligent device for remedying the contaminated soil in the pesticide chemical field according to claim 2, it is characterized in that the bottom in the transfer net box (5) is provided with a connecting box (51), a plurality of hollow sleeves (52) are vertically arranged on the upper end surface of the connecting box (51), shaft rods (53) are rotatably clamped in the hollow sleeves (52), the bottom ends of the shaft rods (53) penetrate through the connecting box (51), the conveying device is provided with connecting gears, the connecting gears are in chain transmission, a plurality of driving worm gears (530) are sleeved on each shaft rod (53), a plurality of stirring rods (54) are rotatably clamped on two sides of each hollow sleeve (52), each stirring rod (54) is meshed with the driving worm gears (530) through a worm (540), and one end, far away from the hollow sleeve (52), of each stirring rod (54) is rotatably clamped with the inner wall of the transfer net box (5); a stirring motor (55) is arranged inside the base (10), and an output shaft of the stirring motor (55) can be movably clamped with one shaft lever (53).
4. The intelligent pesticide chemical field polluted soil restoration device according to claim 1, wherein gear boxes (13) are arranged on two sides of the device box (1), and the two moving motors (32) are respectively positioned inside the two gear boxes (13).
5. The intelligent pesticide chemical field polluted soil restoration device as claimed in claim 1, wherein the two troughs (12) are provided with crushing rollers (14) connected through gear engagement in pairs, and the side wall of the device box (1) is provided with a crushing motor (140) for providing power for the crushing rollers (14).
6. The intelligent device for repairing the polluted soil in the pesticide chemical field according to claim 1, wherein one end of the extraction tube (41) penetrates through the infrared heating rod (31), the other end of the extraction tube penetrates through the movable plate (30), and a return spring (411) with one end abutting against the inner wall of the movable plate (30) and the other end clamped with the outer wall of the extraction tube (41) is sleeved on the extraction tube (41) positioned inside the movable plate (30); the outer wall of the extraction pipe (41) is provided with an opening and closing sliding plate (412) at the position corresponding to each extraction hole (410).
7. The intelligent device for remedying the contaminated soil in the pesticide chemical field as claimed in claim 1, wherein each extraction hole (410) is provided with a blocking filter screen (413).
8. The intelligent pesticide chemical field polluted soil restoration device as claimed in claim 1, wherein the upper end and the lower end of the movable plate (30) are rotatably clamped with guide rollers (300) which can be clamped with the inner wall of the device box (1).
9. An intelligent pesticide chemical industry site contaminated soil remediation method based on any one of claims 1 to 8 is characterized by comprising the following steps:
s1, respectively connecting the pollutant concentration detector, the electric control valve, the electric heating plate (22), the infrared heating rod (31), the mobile motor (32) and the suction pump (42) with an external power supply; then injecting a chemical oxidation medicament into the medicament box (20), and controlling the opening of the electric heating plate (22) through a PLC (programmable logic controller); finally, filling the interiors of the two adsorption boxes (40) with adsorbents;
s2, injecting the polluted soil into the device box (1) through the two material tanks (12), controlling the opening of a pollutant concentration monitoring instrument through a PLC (programmable logic controller), detecting the pollutant concentration in the polluted soil by using the pollutant concentration monitoring instrument, controlling the opening of an electric control valve through the PLC when the pollutant concentration in the polluted soil is low, injecting a chemical oxidation agent into the polluted soil through a liquid adding nozzle (21) in the process that the polluted soil enters the treatment box (11) through a feed hole (110), and performing chemical oxidation treatment on the pollutant in the polluted soil; after the chemical oxidation treatment is finished, discharging the polluted soil out of the device box (1);
s3, when the concentration of pollutants in the polluted soil is high, the PLC controller controls the infrared heating rods (31) and the moving motor (32) to be started, the moving motor (32) drives the moving screw (33) to rotate, the moving plate (30) drives the infrared heating rods (31) to penetrate through holes in the treatment box (11) and then to be inserted into the polluted soil under the action of the moving screw (33), and the pollutants in the polluted soil are subjected to heating desorption treatment;
s4, the suction pump (42) is controlled to be started through the PLC, the polluted gas desorbed from the polluted soil enters the two adsorption tanks (40) after passing through the extraction holes (410) and the extraction pipes (41) in sequence under the action of the suction pump (42), and the harmful substances in the polluted gas are adsorbed by the activated carbon adsorbent filled in the adsorption tanks (40).
10. The intelligent method for remedying the contaminated soil in the pesticide chemical field according to claim 1, wherein the extraction hole (410) is provided with a blocking screen (413).
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