CN111495965B - Microbial remediation equipment and method for treating petroleum-polluted soil - Google Patents

Microbial remediation equipment and method for treating petroleum-polluted soil Download PDF

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CN111495965B
CN111495965B CN202010458769.3A CN202010458769A CN111495965B CN 111495965 B CN111495965 B CN 111495965B CN 202010458769 A CN202010458769 A CN 202010458769A CN 111495965 B CN111495965 B CN 111495965B
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soil
material conveying
repairing
shell
inner cylinder
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CN111495965A (en
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周红如
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GUANGDONG SENDU ECOLOGICAL AGRICULTURE TECHNOLOGY CO.,LTD.
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Guangdong Sendu Ecological Agriculture Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/10Reclamation of contaminated soil microbiologically, biologically or by using enzymes

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Abstract

The invention discloses a microorganism restoring device for restoring oil pollution soil, which belongs to the technical field of oil pollution restoration and restoration, and comprises a base, wherein the top of the base is fixedly provided with a restoring outer cylinder with a hollow bottom, the outer sides of two groups of supporting frames on the left side and the right side are symmetrically fixedly and obliquely provided with material conveying structures with the same structure, the position of the top of an extending hopper between the two groups of material conveying structures is fixedly provided with an automatic additive mechanism, the restoring outer cylinder is movably provided with a restoring inner cylinder with a hollow top and a hollow bottom, the bottom of the automatic additive mechanism is provided with a material conveying column mechanism, the top of the base is provided with a material outlet communicated with the restoring inner cylinder, the material outlet is internally provided with a baffle mechanism attached to the bottom of the restoring inner cylinder, the invention is provided with the material conveying structures, collected oil polluted soil is proportionally fed into a feeding hopper on the right side, and unpolluted soil is proportionally fed into a feeding hopper on the left side, improve work efficiency, reduce the hand labor power, use cost is low simultaneously.

Description

Microbial remediation equipment and method for treating petroleum-polluted soil
Technical Field
The invention relates to the technical field of petroleum pollution treatment and restoration, in particular to microbial restoration equipment and a microbial restoration method for treating petroleum polluted soil.
Background
In various areas of daily life. The main components of petroleum are alkane, cyclane, aromatic hydrocarbon, asphalt, colloid, etc. With the rapid increase of the exploitation amount and the usage amount of petroleum, a large amount of petroleum and various products thereof enter soil, air and underground water as pollutants, and bring serious harm to the ecological environment and human health.
The soil petroleum pollution has the disadvantages of large hidden defect, long latent period, wide related range and difficult treatment, the harm of the soil petroleum pollution is increasingly highlighted, and the soil petroleum pollution becomes an environmental problem which cannot be ignored in the current society. The method for remediating and treating the petroleum-polluted soil can be divided into a physical method, a chemical method and a biological method, wherein the biological remediation technology, particularly the microbial remediation technology has the advantages of low treatment cost, no secondary pollution and in-situ treatment, and is considered to be a remediation technology with wide application prospect in treating the oil-polluted soil.
The existing microorganism repairing equipment has the following defects: 1, because the feed inlets of most repair equipment are arranged above, manual reciprocating feeding or external independent feeding equipment is needed during feeding, the former improves the labor intensity and reduces the working efficiency, and the latter increases the use cost; 2 when the additive is added inwards, the addition amount and the addition time cannot be automatically controlled, and the use is troublesome; 3, the degradation efficiency is low, and the discharging speed of the repaired soil is low, so that the repairing efficiency is influenced. Therefore, a microbial remediation device and a microbial remediation method for treating petroleum-contaminated soil are provided.
Disclosure of Invention
The invention aims to provide a microbial remediation device and a microbial remediation method for treating petroleum-contaminated soil, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a microbial remediation device for treating petroleum-contaminated soil comprises a base, wherein a hollow remediation outer barrel is fixedly arranged at the top of the base, a communicated extension hopper is fixedly arranged in the center of the top of the remediation outer barrel, support frames are welded on the top of the left and right side outer walls of the remediation outer barrel and the left and right side outer walls of the base, material conveying structures with the same structure are symmetrically and fixedly arranged outside two groups of support frames on the left and right sides in an inclined manner, the material conveying structures are matched with the extension hopper, an automatic additive mechanism is fixedly arranged at the top of the extension hopper and between the two groups of material conveying structures, a hollow remediation inner barrel is movably arranged in the remediation outer barrel at the top and the bottom, large bearings are arranged at the top and the bottom of the remediation outer barrel outer wall, the large bearing outer wall is fixed with the remediation outer barrel inner wall, and a material conveying column mechanism is arranged at the bottom of the automatic additive mechanism, and the bottom of the material transferring column mechanism extends to the position below the inner cavity of the repairing inner cylinder, a plurality of groups of heating elements are arranged on the inner wall of the repairing outer cylinder in an annular array, and the heating element is positioned between the two groups of large bearings, the bottom of the outer wall at the left side of the repairing outer cylinder is integrally provided with an insert, and the top of the insert is fixedly provided with a second driving motor, the output end of the second driving motor penetrates through the insert and is fixedly sleeved with a driving gear, the bottom of the outer wall of the left side of the repairing outer cylinder is provided with a movable through hole matched with the driving gear, the bottom of the outer wall of the repairing inner cylinder is fixedly sleeved with a driven gear engaged with the driving gear, the driven gear is positioned below the large bearing at the bottom, the top of the base is provided with a discharging port communicated with the repairing inner cylinder, be provided with in the ejection of compact opening and restore the baffle mechanism of inner tube bottom laminating, the base top just is located the position between defeated material structure in left side and the driving gear and is provided with the PLC controller.
Further, defeated material structure is including fixing the defeated material shell in two sets of support frames outsides, one side below that restoration urceolus was kept away from to defeated material shell is provided with the feeder hopper that is linked together, the fixed protective housing that is provided with in defeated material shell top, and the protective housing internal fixation is provided with driving motor one, a driving motor output run through protective housing bottom and defeated material shell top and with spiral lifting bar top fixed connection, spiral lifting bar bottom extends to defeated material shell inner chamber bottom, defeated material shell is close to one side top of restoreing the urceolus and is provided with the passage that is linked together, and the passage bottom runs through and extends the fill top, be provided with solenoid valve one in the passage.
Further, the automatic additive adding mechanism comprises a mounting shell fixed at the top of the extension hopper, a hollow connecting box is fixedly arranged in the middle of the inner wall of the bottom of the mounting shell, three groups of agent storage shells are fixedly arranged on the inner wall of the top of the mounting shell, agent adding pipes communicated with each other are arranged on the tops of the three groups of agent storage shells, the top of the agent adding pipe penetrates through the top of the mounting shell, liquid level sensors are arranged in the three groups of agent storage shells, the bottoms of the three groups of agent storage shells are communicated with the top of the hollow connecting box through agent conveying pipes, electromagnetic valves II are arranged in the three groups of agent conveying pipes, the left side of the inner wall of the bottom of the mounting shell is fixedly provided with an air blower, the output end of the air blower is provided with an air outlet pipe, and the other end of the air outlet pipe is communicated with the left side of the hollow connecting box, the input end of the air blower is provided with an air inlet pipe, the other end of the air inlet pipe penetrates through the left side of the hollow connecting box, and a filter layer is arranged in the air inlet pipe.
Further, pass the material post mechanism including fixed the passing material post that sets up in hollow connecting box bottom central authorities, pass the material post and be linked together with hollow connecting box, pass material post bottom and run through the installation shell bottom in proper order and extend and fight the top and extend to restore inner tube inner chamber bottom, pass the material post outer wall from last to being provided with the nozzle that the multiunit is linked together down annular array.
Further, baffle mechanism is including the laminating at the baffle of restoreing the inner tube bottom, baffle top central authorities are seted up flutedly, and the recess internal fixation is provided with assorted temperature sensor, temperature sensor is located and restores the inner tube, baffle bottom left side integrated into one piece is provided with the lug, the fixed position that baffle bottom just is located the lug right side is provided with the rack, ejection of compact opening right side inner wall just is located the fixed position of baffle below and is provided with the U-shaped mount pad, and rotates through the pivot in the U-shaped mount pad and be provided with the gear with rack toothing, and the pivot front end runs through the front side of U-shaped mount pad and is connected with the miniature servo motor output, and miniature servo motor fixes the front side at the U-shaped mount pad, ejection of compact opening right side inner wall seted up with baffle complex extending groove.
Further, restore inner tube circumference outer wall and be provided with multiunit heat conduction fin, the multiunit heat conduction fin all is the heliciform installation along restoreing the inner tube outer wall, and multiunit heat conduction fin all is located between two sets of big bearings, it is provided with multiunit mixed branch to restore inner tube circumference inner wall.
A method of microbial remediation apparatus for remediation of petroleum contaminated soil:
s1: respectively adding nutrient solution (formed by mixing an ammonium chloride solution and a potassium dihydrogen phosphate solution according to the proportion of 1:1, wherein the mass percentage concentration of the ammonium chloride solution is 2-4%, the mass percentage concentration of the potassium dihydrogen phosphate solution is 1-2%), a microbial agent and a proper amount of water into the three groups of agent storage shells through three groups of agent adding pipes, and setting the adding amount and adding time of each additive through a PLC (programmable logic controller);
s2: collecting oil contaminated soil with petroleum and determining oil content, taking uncontaminated soil, putting the collected oil contaminated soil into a right feed hopper in proportion, putting the uncontaminated soil into a left feed hopper in proportion, starting a left and right driving motor I, driving a spiral material lifting rod by the driving motor I, opening a first electromagnetic valve I, enabling the oil contaminated soil in a right material conveying shell to be upward and enter an extension hopper through a right material guide pipe, and finally entering a repairing inner cylinder, enabling the uncontaminated soil in the left material conveying shell to be upward and enter the extension hopper through the left material guide pipe, and finally entering the repairing inner cylinder to be mixed with the oil contaminated soil inside to obtain the oil contaminated soil to be treated with the oil content of 8% -12%;
s3: when a certain amount of greasy dirt soil to be treated is in the inner cylinder to be repaired, driving a driving motor II, further driving a driving gear by the driving motor II, enabling the inner cylinder to be repaired to rotate in the outer cylinder to be repaired by the aid of matching of the driving gear and the driven gear, enabling the greasy dirt soil and the unpolluted soil in the inner cylinder to be mixed through a mixing support rod, simultaneously turning on an air blower, injecting outside air into a hollow connecting box by the air blower, enabling the air to enter a material conveying column, and finally enabling microorganisms in the soil to grow rapidly through a nozzle;
s4: after a period of gas injection, the blower is closed, when the adding time of the microbial inoculum is reached, the second electromagnetic valve in the agent conveying pipe at the bottom of the agent storage shell filled with the microbial inoculum is opened, so that the microbial inoculum enters the hollow connecting box and then enters the material conveying column to be finally sprayed out through the nozzle, and the adding standard of the microbial inoculum is as follows: the number of thalli in each gram of greasy dirt soil is enabled to reach one, the adding amount is calculated by a liquid level difference provided by a liquid level sensor, once the adding amount is reached, a system automatically closes a second electromagnetic valve, when the adding time of nutrient solution and water is reached in the same way, the second electromagnetic valve in a corresponding agent conveying pipe at the bottom of an agent storage shell is opened, the nutrient solution or water enters a hollow connecting box and then enters a material conveying column and is finally sprayed out through a nozzle, once the adding amount is reached, the system automatically closes the second electromagnetic valve, the adding amount of the nutrient solution is 8L-10L, and a proper amount of water keeps the water content of the greasy dirt soil to be treated at 45% -50%;
s5, during treatment, sensing the temperature of the internal soil in real time through a temperature sensor, if the soil temperature is lower than 15 ℃, starting a heating element, absorbing heat generated by the heating element by a plurality of groups of heat conduction fins spirally arranged on the outer wall of the repairing inner cylinder along with the rotation of the repairing inner cylinder, uniformly transmitting the heat to the soil inside the repairing inner cylinder, sensing the temperature of the internal soil through the temperature sensor in real time, and if the soil temperature exceeds 20 ℃, closing the heating element and stopping heating and temperature supplementing;
s6, detecting the content of the petroleum pollutants in the oil soil to be treated once every 2 to 3 days, wherein the treatment process lasts for 55 to 65 days;
and S7, after the repairing process is finished through the steps S1-S6, driving the micro servo motor to drive the gear, driving the rack through the gear to drive the baffle plate to move towards the right side to enter the extension tank, and discharging all the repaired soil from the discharge port at the bottom of the repairing inner cylinder to finish repairing.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention is provided with a material conveying structure, collected greasy soil is fed into a right feeding hopper in proportion, uncontaminated soil is fed into a left feeding hopper in proportion, a left driving motor I and a right driving motor I are started, the driving motor drives a spiral material lifting rod, so that the greasy soil in a right material conveying shell is upward and enters an extension hopper through a right material guide pipe, and finally enters a repairing inner cylinder, the uncontaminated soil in the left material conveying shell is upward and enters the extension hopper through a left material guide pipe, and finally enters the repairing inner cylinder to be mixed with the greasy soil in the repairing inner cylinder, the working efficiency is improved, the labor force is reduced, and the use cost is low;
2) the addition amount and the addition time of each additive are set through the PLC, when the addition time of the corresponding additive is reached, the second electromagnetic valve in the agent conveying pipe at the bottom of the agent storage shell filled with the corresponding additive is opened, so that the corresponding additive enters the hollow connecting box and then enters the material conveying column and is finally sprayed out through the nozzle, the addition amount is calculated through the liquid level difference provided by the liquid level sensor, once the addition amount is reached, the second electromagnetic valve is automatically closed by the system, the automatic control of the addition amount and the addition time is realized, the manual labor force is further reduced, and the soil remediation quality and efficiency are improved;
3) the driving motor II drives the driving gear, the repairing inner cylinder rotates in the repairing outer cylinder through the matching of the driving gear and the driven gear, the greasy soil and the unpolluted soil inside the repairing outer cylinder are mixed through the mixing support rod, the mixing uniformity of the soil and the additive is improved, the air blower is arranged, outside air is injected into the hollow connecting box by the air blower, then enters the material conveying column and is finally sprayed out through the nozzle, microorganisms in the soil grow rapidly, the temperature sensor, the heating element and the heat conduction fins are arranged, the uniform heating and temperature compensation in the repairing inner cylinder can be achieved, the repairing quality is improved, the baffle mechanism is arranged, the repaired soil is completely discharged through the discharging opening at the bottom of the repairing inner cylinder, the discharging speed is high, and the repairing efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a feeding structure of the present invention;
FIG. 3 is a sectional view of the automatic dosing mechanism of the present invention;
FIG. 4 is a schematic structural diagram of a baffle mechanism of the present invention.
In the figure: 1. a base; 2. repairing the outer cylinder; 3. a material conveying structure; 31. a feeding shell; 32. a feed hopper; 33. a spiral material lifting rod; 34. a protective shell; 35. driving a motor I; 36. a material guide pipe; 37. a first electromagnetic valve; 4. an extension hopper; 5. an automatic additive mechanism; 51. mounting a shell; 52. a hollow junction box; 53. a drug storage shell; 54. an additive adding pipe; 55. a delivery tube; 56. a liquid level sensor; 57. a second electromagnetic valve; 58. a blower; 6. a material conveying column mechanism; 61. a material conveying column; 62. a nozzle; 7. repairing the inner barrel; 71. a heat conductive fin; 72. a mixing strut; 8. a heating element; 9. a second driving motor; 10. a driving gear; 11. a discharge port; 12. a baffle mechanism; 121. a baffle plate; 122. a temperature sensor; 123. a bump; 124. a rack; 125. a U-shaped mounting seat; 126. a gear; 13. a PLC controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a microbial remediation device for treating petroleum-contaminated soil, please refer to fig. 1, and comprises a base 1, wherein the bottom of the base 1 is provided with supporting legs or moving wheels and the like which can be flexibly selected, detailed description is not provided, the top of the base 1 is fixedly provided with a remediation outer cylinder 2 with a hollow bottom, the remediation outer cylinder 2 can be fixed on the top of the base 1 by bolts, the center of the top of the remediation outer cylinder 2 is fixedly provided with an extension hopper 4 which is communicated, the top of the extension hopper 4 is closed, so that soil can better enter a remediation inner cylinder 7, in actual conditions, the left side of the extension hopper 4 is also provided with a communicated through hole, and a pressure release valve is arranged in the through hole;
referring to fig. 1, the top of the outer wall of the left and right sides of the repairing outer cylinder 2 and the outer wall of the left and right sides of the base 1 are welded with supporting frames, the supporting frames are used for supporting and installing structures, and the outer sides of the two groups of supporting frames on the left and right sides are symmetrically, fixedly and obliquely provided with material conveying structures 3 with the same structure, the material conveying structures 3 are convenient for conveying greasy soil and uncontaminated soil into the repairing inner cylinder 7, and the material conveying structures 3 are matched with the extension hopper 4;
referring to fig. 1, an automatic additive adding mechanism 5 is fixedly arranged at the top of the extending hopper 4 and between the two material conveying structures 3, and the automatic additive adding mechanism 5 realizes additive adding control;
referring to fig. 1, a repairing inner cylinder 7 with a hollow top and a hollow bottom is movably arranged in a repairing outer cylinder 2, the bottom of the repairing inner cylinder 7 extends to the top of an inner discharging opening 11, large bearings are arranged at the top and the bottom of the outer wall of the repairing inner cylinder 7, the outer wall of each large bearing is fixed to the inner wall of the repairing outer cylinder 2, the large bearings ensure that the repairing inner cylinder 7 can rotate and prevent the repairing inner cylinder 7 from moving up and down, a plurality of groups of balls can be arranged at the top of the repairing inner cylinder 7 to be matched with annular ball grooves at the top of the inner wall of the repairing outer cylinder 2, so that the contact abrasion between the repairing inner cylinder 7 and the repairing outer cylinder 2 is reduced, a material conveying column mechanism 6 is arranged at the bottom of an automatic additive mechanism 5, the bottom of the material conveying column mechanism 6 extends to a position below the inner cavity of the repairing inner cylinder 7, and the material conveying column mechanism 6 realizes the addition of air and additives;
referring to fig. 1, a plurality of groups of heating elements 8 are arranged in an annular array on the inner wall of the repairing outer cylinder 2, the heating elements 8 are located between two groups of large bearings, the heating elements 8 include electric heating rods, electric heating plates or electric heating nets and the like, so as to realize heating and temperature supplementing for soil, the heating elements 8 are widely applied in the field, and can be flexibly selected by a person skilled in the art, which is not described in detail herein;
referring to fig. 1, an insert is integrally formed at the bottom of the outer wall of the left side of the repair outer cylinder 2, the insert plays a role of supporting and installing a structure, a second driving motor 9 is fixedly arranged at the top of the insert, an output end of the second driving motor 9 penetrates through the insert and is fixedly sleeved with a driving gear 10, the driving gear 10 is located below the insert, a movable through hole matched with the driving gear 10 is formed in the bottom of the outer wall of the left side of the repair outer cylinder 2, the movable through hole facilitates the driving gear 10 to drive a driven gear, a driven gear meshed with the driving gear 10 is fixedly sleeved at the bottom of the outer wall of the repair inner cylinder 7, and the driven gear is located below a large bearing at the bottom;
referring to fig. 1, a discharge port 11 communicated with the repairing inner cylinder 7 is formed in the top of the base 1, the bottom of the discharge port 11 penetrates through the bottom of the base 1, the discharge port 11 facilitates discharging of soil in the repairing inner cylinder 7, a baffle mechanism 12 attached to the bottom of the repairing inner cylinder 7 is arranged in the discharge port 11, the baffle mechanism 12 blocks and opens discharging, a wear-resistant sealing ring can be arranged at the bottom of the repairing inner cylinder 7, the wear-resistant sealing ring can be made of polyethylene materials, and contact wear between the repairing inner cylinder 7 and a baffle 121 is reduced;
referring to fig. 1, a PLC controller 13 is disposed at a position on the top of the base 1 and between the left feeding structure 3 and the driving gear 10, electrical components of the present invention are all connected to an external power source through wires, and are all controlled by the PLC controller 13, the PLC controller 13 can be of type XM-I13, a reference temperature can be set, when the soil temperature detected by the temperature sensor 122 is lower than 15 ℃, the heating element 8 is turned on, and the soil temperature exceeds 20 ℃, the heating element 8 is turned off, and the addition amount, the addition time, and the cooperation of the liquid level sensor 56 of each additive can be set to control the opening and closing of the second electromagnetic valve 57 in the three groups of infusion pipes 55.
As shown in fig. 1 and 2: the material conveying structure 3 comprises material conveying shells 31 fixed on the outer sides of two groups of supporting frames, the vertical cross sections of the material conveying shells 31 are rectangular, a communicated feed hopper 32 is arranged below one side of the material conveying shell 31 away from the repairing outer cylinder 2, the feed hopper 32 enables soil to enter the material conveying shell 31, one side of the feed hopper 32 away from the material conveying shell 31 is provided with a shell cover, the top of the material conveying shell 31 is fixedly provided with a protective shell 34, the protective shell 34 is used for protecting and installing the structure, one side of the protective shell is provided with the shell cover, an internal driving motor I35 is convenient to maintain, a driving motor I35 is fixedly arranged in the protective shell 34, the driving motor I35 is used for driving a spiral material lifting rod 33 to rotate, the output end of the driving motor I35 penetrates through the bottom of the protective shell 34 and the top of the material conveying shell 31 and is fixedly connected with the top end of the spiral material lifting rod 33, the bottom end of the spiral material lifting rod 33 extends to the bottom of an inner cavity of the material conveying shell 31, the spiral material lifting rod 33 lifts the soil upwards, a material conveying shell 31 is provided with a communicated guide pipe 36 above one side close to the repairing outer cylinder 2, the bottom of the material guide pipe 36 penetrates through the top of the extension hopper 4, the material guide pipe 36 is communicated with the inner cavity of the extension hopper 4, a first electromagnetic valve 37 is arranged in the material guide pipe 36, and soil enters the extension hopper 4 and then enters the remediation inner cylinder 7 through the material guide pipe 36;
as shown in fig. 3: the automatic additive mechanism 5 comprises a mounting shell 51 fixed at the top of the extension hopper 4, the mounting shell 51 plays a role of supporting and mounting structure, a hollow connecting box 52 is fixedly arranged in the middle of the inner wall of the bottom of the mounting shell 51, the hollow connecting box 52 plays a role of shunting, three groups of additive storage shells 53 are fixedly arranged on the inner wall of the top of the mounting shell 51, the three groups of additive storage shells 53 are respectively used for storing nutrient solution (formed by mixing ammonium chloride solution and potassium dihydrogen phosphate solution according to the proportion of 1:1, wherein the mass percentage concentration of the ammonium chloride solution is 2-4%, the mass percentage concentration of the potassium dihydrogen phosphate solution is 1-2%), microbial agents and a proper amount of water, additive pipes 54 communicated with each other are arranged at the tops of the three groups of additive storage shells 53, the additive pipes 54 are convenient to add into the additive storage shells 53, control valves are also arranged in the additive pipes 54, and the tops of the additive pipes 54 penetrate through the top of the mounting shell 51, the liquid level sensors 56 are arranged in the three groups of agent storing shells 53, the type of the liquid level sensors 56 is EE-SPX613, certainly, the type is not limited to the type, and the specific type can be determined according to actual needs, the bottoms of the three groups of agent storing shells 53 are communicated with the top of the hollow connecting box 52 through the agent conveying pipe 55, a one-way valve can be arranged in the agent conveying pipe 55 to prevent air input by the air blower 58 from entering, the electromagnetic valves two 57 are arranged in the three groups of agent conveying pipes 55, the electromagnetic valves two 57 control the on-off of additive input, the air blower 58 is fixedly arranged on the left side of the inner wall of the bottom of the mounting shell 51, the air blower 58 enables outside air to enter, the output end of the air blower 58 is provided with an air outlet pipe, the other end of the air outlet pipe is communicated with the left side of the hollow connecting box 52, the one-way valve can be arranged in the air outlet pipe to prevent additive from entering, the input end of the air inlet pipe 58 is provided with an air inlet pipe, and the other end of the air inlet pipe penetrates through the left side of the hollow connecting box 52, the air inlet pipe is internally provided with a filter layer which filters air entering from the air inlet pipe, the filter layer is widely applied in the field and can be flexibly selected by a person skilled in the field, and the detailed description is not needed;
as shown in fig. 1: the material conveying column mechanism 6 comprises a material conveying column 61 fixedly arranged in the center of the bottom of the hollow connecting box 52, the material conveying column 61 is communicated with the hollow connecting box 52, the material conveying column 61 enables additives or air in the hollow connecting box 52 to enter, the bottom of the material conveying column 61 sequentially penetrates through the bottom of the mounting shell 51 and the top of the extending bucket 4 and extends to the bottom of the inner cavity of the repairing inner cylinder 7 and is used for enabling the additives or the air to enter the soil in the repairing inner cylinder 7, a plurality of groups of communicated nozzles 62 are annularly arranged on the outer wall of the material conveying column 61 from top to bottom in an array mode, and the nozzles 62 enable the air or the additives to enter the soil in the repairing inner cylinder 7;
as shown in fig. 4: the baffle mechanism 12 comprises a baffle 121 attached to the bottom of the repair inner cylinder 7, the baffle 121 is used for sealing the bottom of the repair inner cylinder 7 when in normal use, so that soil in the repair inner cylinder 7 cannot be discharged, a groove is formed in the center of the top of the baffle 121, a matched temperature sensor 122 is fixedly arranged in the groove, the temperature sensor 122 is used for detecting the temperature of the soil in the repair inner cylinder 7, and further whether heating and temperature compensation are needed is conveniently determined, the type of the temperature sensor 122 can be BCC034A, certainly, the type is not limited to the type, and can be determined according to actual needs, the top of the temperature sensor 122 and the baffle 121 are located on the same plane, so that the baffle 121 does not interfere with movement of the temperature sensor 122, the temperature sensor 122 is located in the repair inner cylinder 7, a bump 123 is integrally formed on the left side of the bottom of the baffle 121, the bump 123 prevents the baffle 121 from being separated from a gear 126, and a rack 124 is fixedly arranged at the bottom of the baffle 121 and located on the right of the bump 123, the rack 124 is used for being matched with the gear 126, a U-shaped mounting seat 125 is fixedly arranged on the inner wall of the right side of the discharging port 11 and below the baffle 121, the U-shaped mounting seat 125 plays a role in supporting and mounting a structure, the gear 126 meshed with the rack 124 is rotatably arranged in the U-shaped mounting seat 125 through a rotating shaft, the front end of the rotating shaft penetrates through the front side of the U-shaped mounting seat 125 and is connected with the output end of a micro servo motor, the micro servo motor drives the rotating shaft to further enable the gear 126 to rotate, the micro servo motor is fixed on the front side of the U-shaped mounting seat 125, an extension groove matched with the baffle 121 is formed in the inner wall of the right side of the discharging port 11, the baffle 121 can conveniently move towards the right side, in order to enable the baffle 121 to accurately enter the extension groove, a sliding block can be arranged at the right end of the top of the baffle 121, and a transverse sliding groove matched with the sliding block is formed in the inner wall of the top of the extension groove;
as shown in fig. 1: the outer wall of the circumference of the inner repairing cylinder 7 is provided with a plurality of groups of heat conducting fins 71, the material of the heat conducting fins 71 is a material with good heat conducting property, such as a metal material of copper, aluminum and the like, in order to further improve the heat conducting property of the heat conducting fins 71 to the inner repairing cylinder 7, the inner repairing cylinder 7 can also be made of a material with good heat conducting property and high corrosion resistance, the selection is carried out according to the actual situation, detailed description is not needed, the plurality of groups of heat conducting fins 71 are spirally arranged along the outer wall of the inner repairing cylinder 7, the spiral installation is convenient to uniformly transmit the heat generated by the heating element 8 to the soil in the inner repairing cylinder 7, uniform heating and temperature compensation are realized, the plurality of groups of heat conducting fins 71 are all positioned between two groups of large bearings, the inner wall of the circumference of the inner repairing cylinder 7 is provided with a plurality of groups of mixing struts 72, the mixing struts 72 play a certain stirring role on the soil when the inner repairing cylinder 7 rotates, and the mixing struts 72 are staggered with the nozzles 62, avoiding mutual interference.
A method of microbial remediation apparatus for remediation of petroleum contaminated soil:
s1: nutrient solution (formed by mixing an ammonium chloride solution and a potassium dihydrogen phosphate solution according to the proportion of 1:1, wherein the mass percentage concentration of the ammonium chloride solution is 2-4%, the mass percentage concentration of the potassium dihydrogen phosphate solution is 1-2%), a microbial agent and a proper amount of water are respectively added into the three groups of agent storage shells 53 through three groups of agent adding pipes 54, and the adding amount and the adding time of each additive are set through the PLC 13;
s2: collecting oil contaminated soil with petroleum and determining oil content, taking uncontaminated soil, putting the collected oil contaminated soil into a right feed hopper 32 in proportion, putting the uncontaminated soil into a left feed hopper 32 in proportion, starting a left and right driving motor 35, driving a spiral lifting rod 33 by the driving motor 35, opening a first electromagnetic valve 37, enabling the oil contaminated soil in a right material conveying shell 31 to ascend, enter an extension hopper 4 through a right material guide pipe 36 and finally enter a repairing inner cylinder 7, enabling the uncontaminated soil in the left material conveying shell 31 to ascend, enter the extension hopper 4 through the left material guide pipe 36 and finally enter the repairing inner cylinder 7 to be mixed with the oil contaminated soil inside, and obtaining the oil contaminated soil to be treated with the oil content of 8-12%;
s3: when a certain amount of oil soil to be treated is contained in the inner cylinder 7 to be repaired, the driving motor II 9 is driven, the driving motor II 9 drives the driving gear 10, the inner cylinder 7 to be repaired rotates in the outer cylinder 2 through the matching of the driving gear 10 and the driven gear, the oil soil in the inner cylinder is mixed with the unpolluted soil through the mixing support rod 72, the soil is prevented from adhering to the inner wall of the inner cylinder 7 through the fixed scraper 63, the air blower 58 is turned on, the air from the outside is injected into the hollow connecting box 52 by the air blower 58, enters the material conveying column 61 and is finally sprayed out through the nozzle 62, and microorganisms in the soil are enabled to grow rapidly;
s4: after the gas is injected for a period of time, the blower 58 is closed, and when the adding time of the microbial inoculum is reached, the second electromagnetic valve 57 in the agent conveying pipe 55 at the bottom of the agent storage shell 53 containing the microbial inoculum is opened, so that the microbial inoculum enters the hollow connecting box 52, enters the material conveying column 61 and is finally sprayed out through the nozzle 62, and the adding standard of the microbial inoculum is as follows: the number of thalli in each gram of oil soil reaches 107, the addition amount is calculated by a liquid level difference provided by a liquid level sensor 56, once the addition amount is reached, a system automatically closes a second electromagnetic valve 57, and when the addition time of nutrient solution and water is reached, the corresponding second electromagnetic valve 57 in an agent conveying pipe 55 at the bottom of an agent storage shell 53 is opened, so that the nutrient solution or water enters a hollow connecting box 52 and then enters a material conveying column 61 and is finally sprayed out through a nozzle 62, once the addition amount is reached, the system automatically closes the second electromagnetic valve 57, the addition amount of the nutrient solution is 8L-10L, and a proper amount of water keeps the water content of the oil soil to be treated at 45% -50%;
s5, during treatment, sensing the temperature of the internal soil in real time through a temperature sensor 122, if the soil temperature is lower than 15 ℃, starting a heating element 8, absorbing heat generated by the heating element 8 by a plurality of groups of heat conducting fins 71 spirally arranged on the outer wall of the repairing inner cylinder 7 along with the rotation of the repairing inner cylinder 7, uniformly transmitting the heat to the soil inside the repairing inner cylinder 7, sensing the temperature of the internal soil in real time through the temperature sensor 122, and if the soil temperature exceeds 20 ℃, closing the heating element 8 and stopping heating and supplementing the temperature;
s6, detecting the content of the petroleum pollutants in the oil soil to be treated once every 2 to 3 days, wherein the treatment process lasts for 55 to 65 days;
s7, after the repairing process is finished through the steps S1-S6, the micro servo motor is driven to drive the gear 126, the gear 126 drives the rack 124 to drive the baffle 121 to move towards the right side to enter the extension groove, and then all the repaired soil is discharged from the discharge port 11 at the bottom of the repairing inner cylinder 7, and the repairing is finished.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. A method for treating petroleum-polluted soil by using microbial remediation equipment is characterized by comprising the following steps:
s1: nutrient solution, microbial agent and a proper amount of water are respectively added into the three groups of agent storage shells (53) through three groups of agent adding pipes (54), and the addition amount and the addition time of each additive are set through a PLC (13); the nutrient solution is formed by mixing an ammonium chloride solution and a potassium dihydrogen phosphate solution according to the proportion of 1:1, wherein the mass percentage concentration of the ammonium chloride solution is 2-4%, and the mass percentage concentration of the potassium dihydrogen phosphate solution is 1-2%;
s2: collecting oil contaminated soil with petroleum and determining oil content, taking uncontaminated soil, putting the collected oil contaminated soil into a right feed hopper (32) in proportion, putting the uncontaminated soil into a left feed hopper (32) in proportion, starting a left and right driving motor I (35), driving a spiral lifting rod (33) by the driving motor I (35), opening a first electromagnetic valve I (37), enabling the oil contaminated soil in a right material conveying shell (31) to ascend, enter an extension hopper (4) through a right material guide pipe (36), and finally enter a repairing inner cylinder (7), enabling the uncontaminated soil in the left material conveying shell (31) to ascend, enter the extension hopper (4) through the left material guide pipe (36), and finally enter the repairing inner cylinder (7) to be mixed with the oil contaminated soil inside to obtain the oil contaminated soil to be treated with the oil content of 8-12%;
s3: when a certain amount of oil soil to be treated is contained in the inner cylinder (7) to be repaired, a driving motor II (9) is driven, a driving gear (10) is driven by the driving motor II (9), the repairing inner cylinder (7) rotates in the repairing outer cylinder (2) through the matching of the driving gear (10) and a driven gear, the oil soil inside is mixed with the unpolluted soil through a mixing support rod (72), meanwhile, an air blower (58) is turned on, the air blower (58) injects outside air into a hollow connecting box (52), then enters a material conveying column (61) and finally is sprayed out through a nozzle (62), and microorganisms in the soil are enabled to grow rapidly;
s4: after gas injection for a period of time, the blower (58) is closed, when the adding time of the microbial inoculum is reached, the second electromagnetic valve (57) in the agent conveying pipe (55) at the bottom of the agent storage shell (53) filled with the microbial inoculum is opened, so that the microbial inoculum enters the hollow connecting box (52), then enters the material conveying column (61) and is finally sprayed out through the nozzle (62), and the adding standard of the microbial inoculum is as follows: the number of thalli in each gram of oil soil reaches 107, the addition amount is calculated by a liquid level difference provided by a liquid level sensor (56), once the addition amount is reached, a second electromagnetic valve (57) is automatically closed by a system, when the addition time of nutrient solution and water is reached in the same way, the second electromagnetic valve (57) in a corresponding agent conveying pipe (55) at the bottom of an agent storage shell (53) is opened, the nutrient solution or water enters a hollow connecting box (52), then enters a material conveying column (61) and is finally sprayed out through a nozzle (62), once the addition amount is reached, the second electromagnetic valve (57) is automatically closed by the system, the addition amount of the nutrient solution is 8L-10L, and a proper amount of water keeps the water content of the oil soil to be treated at 45% -50%;
s5, during treatment, sensing the temperature of the internal soil in real time through a temperature sensor (122), if the soil temperature is lower than 15 ℃, starting a heating element (8), rotating a plurality of groups of heat conducting fins (71) spirally arranged on the outer wall of a repair inner cylinder (7) along with the repair inner cylinder to absorb heat generated by the heating element (8) and uniformly transfer the heat to the soil inside the repair inner cylinder (7), sensing the temperature of the internal soil in real time through the temperature sensor (122), and if the soil temperature exceeds 20 ℃, closing the heating element (8) and stopping heating and temperature supplementing;
s6, detecting the content of the petroleum pollutants in the oil soil to be treated once every 2 to 3 days, wherein the treatment process lasts for 55 to 65 days;
s7, after the repairing process is finished through S1-S6, the micro servo motor is driven to drive the gear (126), the gear (126) drives the rack (124) to drive the baffle plate (121) to move towards the right side to enter the extension groove, and then all the repaired soil is discharged from the discharging port (11) at the bottom of the repairing inner cylinder (7) to finish repairing;
the microbial remediation equipment comprises a base (1), wherein the top of the base (1) is fixedly provided with a remediation outer cylinder (2) with a hollow bottom, the center of the top of the remediation outer cylinder (2) is fixedly provided with an extension hopper (4) communicated with each other, the top of the outer wall of the left side and the right side of the remediation outer cylinder (2) and the outer wall of the left side and the right side of the base (1) are both welded with supporting frames, the outer sides of the two groups of supporting frames on the left side and the right side are symmetrically and fixedly inclined to form a material conveying structure (3) with the same structure, the material conveying structure (3) is matched with the extension hopper (4), the position of the top of the extension hopper (4) and between the two groups of material conveying structures (3) is fixedly provided with an automatic additive adding mechanism (5), the top and the bottom of the remediation outer cylinder (2) are both provided with a hollow remediation inner cylinder (7), and the top and the bottom of the outer wall of the remediation inner cylinder (7) are both provided with large bearings, and the outer wall of the large bearing is fixed with the inner wall of the repairing outer cylinder (2), a material transmission column mechanism (6) is arranged at the bottom of the automatic additive mechanism (5), the bottom of the material transmission column mechanism (6) extends to the position, which is leaned against the lower part, of the inner cavity of the repairing inner cylinder (7), a plurality of groups of heating elements (8) are arranged in an annular array on the inner wall of the repairing outer cylinder (2), the heating elements (8) are positioned between two groups of large bearings, an insert is arranged at the bottom of the outer wall at the left side of the repairing outer cylinder (2) in an integrated manner, a driving motor II (9) is fixedly arranged at the top of the insert, the output end of the driving motor II (9) penetrates through the insert and is fixedly sleeved with a driving gear (10), a movable opening matched with the driving gear (10) is arranged at the bottom of the outer wall at the left side of the repairing outer cylinder (2), a driven gear meshed with the driving gear (10) is fixedly sleeved at the bottom of the outer wall of the repairing inner cylinder (7), the driven gear is positioned below the large bearing at the bottom, a discharging through hole (11) communicated with the repairing inner cylinder (7) is formed in the top of the base (1), a baffle mechanism (12) attached to the bottom of the repairing inner cylinder (7) is arranged in the discharging through hole (11), and a PLC (programmable logic controller) (13) is arranged at the top of the base (1) and between the left material conveying structure (3) and the driving gear (10);
the material conveying structure (3) comprises material conveying shells (31) fixed at the outer sides of the two groups of supporting frames, a feed hopper (32) communicated with the feed delivery shell (31) is arranged below one side of the feed delivery shell (31) far away from the repair outer cylinder (2), a protective shell (34) is fixedly arranged at the top of the feed delivery shell (31), a first driving motor (35) is fixedly arranged in the protective shell (34), the output end of the first driving motor (35) penetrates through the bottom of the protective shell (34) and the top of the material conveying shell (31) and is fixedly connected with the top end of the spiral lifting rod (33), the bottom end of the spiral material lifting rod (33) extends to the bottom of the inner cavity of the material conveying shell (31), a material guide pipe (36) communicated with the upper part of one side of the material conveying shell (31) close to the repairing outer cylinder (2), the bottom of the material guide pipe (36) penetrates through the top of the extension hopper (4), and a first electromagnetic valve (37) is arranged in the material guide pipe (36);
automatic additive mechanism (5) is including fixing installation shell (51) at extension fill (4) top, installation shell (51) bottom inner wall middle part is fixed and is provided with hollow connection box (52), installation shell (51) top inner wall is fixed and is provided with three groups and stores up agent shell (53), three groups store up agent shell (53) top and all be provided with adding agent pipe (54) that are linked together, and add agent pipe (54) top and run through installation shell (51) top, three groups all be provided with level sensor (56) in storing up agent shell (53), three groups store up agent shell (53) bottom and all be linked together through defeated agent pipe (55) and hollow connection box (52) top, three groups all be provided with second (57) of solenoid valve in defeated agent pipe (55), installation shell (51) bottom inner wall left side is fixed and is provided with air-blower (58), the output of 58) is provided with out the tuber pipe, the other end of the air outlet pipe is communicated with the left side of the hollow connecting box (52), an air inlet pipe is arranged at the input end of the air blower (58), the other end of the air inlet pipe penetrates through the left side of the hollow connecting box (52), and a filter layer is arranged in the air inlet pipe;
the material conveying column mechanism (6) comprises a material conveying column (61) fixedly arranged in the center of the bottom of the hollow connecting box (52), the material conveying column (61) is communicated with the hollow connecting box (52), the bottom of the material conveying column (61) sequentially penetrates through the bottom of the mounting shell (51) and the top of the extending hopper (4) and extends to the bottom of the inner cavity of the repairing inner cylinder (7), and a plurality of groups of communicated nozzles (62) are annularly arranged on the outer wall of the material conveying column (61) from top to bottom in an array manner;
the baffle mechanism (12) comprises a baffle (121) attached to the bottom of the repair inner cylinder (7), a groove is formed in the center of the top of the baffle (121), a matched temperature sensor (122) is fixedly arranged in the groove, the temperature sensor (122) is positioned in the repair inner cylinder (7), a convex block (123) is integrally formed on the left side of the bottom of the baffle (121), a rack (124) is fixedly arranged at the bottom of the baffle (121) and positioned on the right side of the convex block (123), a U-shaped mounting seat (125) is fixedly arranged on the inner wall of the right side of the discharging through hole (11) and positioned below the baffle (121), a gear (126) meshed with the rack (124) is rotatably arranged in the U-shaped mounting seat (125) through a rotating shaft, the front end of the rotating shaft penetrates through the front side of the U-shaped mounting seat (125) and is connected with the output end of a micro servo motor, and the micro servo motor is fixed on the front side of the U-shaped mounting seat (125), an extension groove matched with the baffle (121) is formed in the inner wall of the right side of the discharging through hole (11);
it is provided with multiunit heat conduction fin (71) to restore inner tube (7) circumference outer wall, multiunit heat conduction fin (71) all are the heliciform installation along restoring inner tube (7) outer wall, and multiunit heat conduction fin (71) all are located between two sets of big bearings, it is provided with multiunit mixed branch (72) to restore inner tube (7) circumference inner wall.
CN202010458769.3A 2020-05-27 2020-05-27 Microbial remediation equipment and method for treating petroleum-polluted soil Active CN111495965B (en)

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