Intelligent soil remediation device utilizing microorganisms

Abstract

The utility model provides an intelligent soil remediation device utilizing microorganisms, which comprises a control cabinet, a nutrient solution storage tank, a fermentation tank, a soil mixing mechanism, a powdery microbial agent conveying mechanism and an original soil conveying mechanism, a PLC (Programmable Logic Controller) is arranged in the control cabinet, and a nutrient solution is filled in the nutrient solution storage tank; a first nutrient solution conveying pipeline is arranged between the nutrient solution storage tank and the fermentation tank, a second microorganism bacterium liquid conveying pipeline is arranged between the fermentation tank and the soil mixing mechanism, and the powdery microorganism bacterium agent conveying mechanism is used for conveying powdery microorganism bacterium agents into the fermentation tank; the original soil conveying mechanism is used for conveying polluted soil into the soil mixing mechanism. According to the remediation device, expanding culture is conducted on the microbial agent, the microbial agent is directly mixed with the contaminated soil after expanding culture, and therefore the activity of the microbial agent can be guaranteed, the follow-up remediation effect on the contaminated soil is guaranteed, meanwhile, automatic operation can be achieved through the PLC, and manpower is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil remediation technical field, specifically is a kind of intelligent soil remediation device using microorganism. BACKGROUND

[0002] Soil remediation is the technical measure to restore the contaminated soil to normal function.In the soil remediation industry, there are more than 100 kinds of soil remediation technologies, and more than 10 kinds of commonly used technologies, which can be roughly divided into physical, chemical and biological methods. Traditional ex situ soil remediation mixing device mostly mixes contaminated soil and chemical reagent according to a certain proportion, and then takes out and backfills after reaction, which has the problems of long process, high energy consumption and large carbon emission.

[0003] Bioremediation is a promising technology for transforming or degrading toxic chemicals in different environmental media, and compared with physical and chemical methods, bioremediation is safe, economical and environmentally friendly, and has become one of the current research hotspots. Among them, microbial remediation technology is to use indigenous bacteria, foreign bacteria and genetically engineered bacteria to metabolize and transform and degrade pollutants, mainly for the degradation of organic pollutants in soil.

[0004] At present, when using microbial remediation technology to repair soil, the prepared soil remediation bacteria liquid is often transported to the soil pollution site, and due to the limitation of transportation conditions, the soil remediation bacteria liquid often fails, which affects the effect of microbial modification of soil. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of intelligent soil remediation device using microorganism, the repair device is cultivated to microbial inoculant, and then directly mixed with contaminated soil, so as to ensure the activity of microbial inoculant, ensure the repair effect of subsequent contaminated soil, at the same time, PLC controller can realize automatic operation, save manpower.

[0006] The utility model discloses a technical scheme that solves its technical problem is: a kind of intelligent soil remediation device using microorganism, including control cabinet, nutrient solution storage tank, fermenter, soil mixing mechanism, powdery microbial inoculant conveying mechanism, raw soil conveying mechanism, the control cabinet is provided with PLC controller, nutrient solution is stored in the nutrient solution storage tank, heating device is provided on the outer lateral wall of the nutrient solution storage tank, first nutrient solution conveying pipeline is provided between the nutrient solution storage tank and the fermenter, second microbial inoculant conveying pipeline is provided between the fermenter and the soil mixing mechanism, the powdery microbial inoculant conveying mechanism is used to convey powdery microbial inoculant into the fermenter, the raw soil conveying mechanism is used to convey contaminated soil into the soil mixing mechanism, the PLC controller can control the operation of first nutrient solution conveying pipeline, fermenter, second microbial inoculant conveying pipeline, powdery microbial inoculant conveying mechanism, raw soil conveying mechanism and soil mixing mechanism.

[0007] Preferably, the heating device is a heating coil, which is arranged on the outer lateral wall of the nutrient solution storage tank in a spiral winding manner, and the PLC controller can control the operation of the heating coil.

[0008] Further, a first temperature sensor is arranged in the nutrient solution storage tank, and the first temperature sensor is electrically connected with the PLC controller.

[0009] Further, the first nutrient solution conveying pipeline comprises a first pipeline, the first pipeline realizes through connection between the bottom of the nutrient solution storage tank and the upper side of the inside of the fermenter, a first conveying pump, a first electric regulating valve and a first flow meter are sequentially connected in series on the first pipeline, and the first conveying pump, the first electric regulating valve and the first flow meter are electrically connected with the PLC controller.

[0010] Further, the soil mixing mechanism comprises a rotary drum, the rotary drum can freely rotate, and the rotary drum is distributed in an inclined state with the feeding end being higher than the discharging end, and spiral blades are arranged on the inner lateral wall of the rotary drum.

[0011] Further, the second microbial inoculant conveying pipeline comprises a second pipeline, the liquid inlet end of the second pipeline is in through connection with the inner bottom of the fermenter, the liquid outlet end of the second pipeline is deeply inserted into the feeding port of the rotary drum, the liquid outlet end of the second pipeline is in a closed state, a plurality of liquid outlet holes are arranged on the lateral wall of the liquid outlet end of the second pipeline, and a second conveying pump, a second electric regulating valve and a second flow meter are sequentially connected in series on the second pipeline, and the second conveying pump, the second electric regulating valve and the second flow meter are electrically connected with the PLC controller.

[0012] Further, the powder microbial agent conveying mechanism is a first screw conveyor, material flowed out from a discharging end of the first screw conveyor falls into a microbial agent feeding hopper arranged at an upper portion of the fermentation tank, and the first screw conveyor is electrically connected with the PLC controller.

[0013] Further, the raw soil conveying mechanism is a second screw conveyor, material flowed out from a discharging end of the second screw conveyor enters into a feeding end of the rotary drum through a soil feeding hopper, and the second screw conveyor is electrically connected with the PLC controller.

[0014] Further, a second temperature sensor and a first liquid level sensor are arranged in the fermentation tank, a stirring shaft with stirring blades is also arranged in the fermentation tank, the stirring shaft with stirring blades is driven to operate through a motor, a third temperature sensor is arranged in the feeding end of the rotary drum, and the PLC controller is electrically connected with the second temperature sensor, the third temperature sensor, the first liquid level sensor and the motor.

[0015] Further, a receiving box is arranged below a discharging end of the rotary drum.

[0016] The present application has the advantages of simple structure, convenient processing and manufacturing, and automatic operation control through the PLC control, thereby saving manpower. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are part of the preferred embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 is a structural composition principle diagram of the present application;

[0019] Figure 2 is a local schematic view of the liquid outlet end of the second pipeline;

[0020] In the figure: 1 control cabinet, 2 nutrient solution storage tank, 3 fermentation tank, 31 inoculum feeding hopper, 32 stirring shaft with stirring blades, 33 motor, 4 rotary drum, 41 soil feeding hopper, 42 receiving box, 5 first screw conveyor, 6 second screw conveyor, 71 first pipeline, 72 first conveying pump, 73 first electric regulating valve, 74 first flow meter, 81 second pipeline, 811 liquid outlet hole, 82 second conveying pump, 83 second electric regulating valve, 84 second flow meter, 101 first temperature sensor, 102 second temperature sensor, 103 first liquid level sensor, 104 third temperature sensor. DETAILED DESCRIPTION

[0021] The specific embodiments will be described below with reference to the accompanying drawings. Figures 1-2 The technical solutions in the embodiments of the present application are clearly and completely described, and obviously, the described embodiments are only a part of the preferred embodiments of the present application, rather than all the embodiments. Those skilled in the art can make similar modifications without departing from the connotation of the present application, and therefore the present application is not limited by the specific embodiments disclosed below.

[0022] The intelligent soil remediation device provided by the present application utilizes microorganisms (such as bacteria, fungi, etc. Figure 1The utility model provides an automatic operation system of soil microbial remediation, including control cabinet 1, nutrient solution storage tank 2, fermenting tank 3, soil mixing mechanism, powdered microbial inoculant conveying mechanism, raw soil conveying mechanism, be provided with PLC controller in control cabinet 1, and PLC controller is the mature technology product in the industrial automation field, here, the working principle and structure of PLC controller are not introduced in detail again, be provided with heating device on the outside wall of nutrient solution storage tank 2, and heating device is used to realize the heating of nutrient solution in nutrient solution storage tank 2, in this specific embodiment, heating device is set as heating coil, and heating coil is set up in the spiral winding mode on the outside wall of nutrient solution storage tank 2, the PLC controller can control the operation of heating coil, in actual application, when heating coil is electrified, then it carries out heating and realizes the heating of nutrient solution, when nutrient solution is heated to certain temperature, then PLC controller can realize the power-off of heating coil, and then realizes the stop heating, thereby can guarantee that nutrient solution maintains in certain temperature, be provided with first nutrient solution conveying pipeline between nutrient solution storage tank 2 and fermenting tank 3, and the conveying of nutrient solution in nutrient solution storage tank 2 to fermenting tank 3 can be realized by first nutrient solution conveying pipeline, thereby provides the basic condition for the expansion of microbial inoculant, be provided with second microbial inoculant conveying pipeline between fermenting tank 3 and soil mixing mechanism, and second microbial inoculant conveying pipeline is used to realize the conveying of the microbial inoculant after expansion to soil mixing mechanism, and the microbial inoculant after expansion in fermenting tank 3 can be directly conveyed to soil mixing mechanism and mixes with contaminated soil through second microbial inoculant conveying pipeline, thereby effectively avoids the invalid problem of microbial inoculant due to storage and long-distance transportation, thereby can guarantee the activity of microbial inoculant, then can guarantee the effective repair of contaminated soil, the powdered microbial inoculant conveying mechanism is used to convey powdered microbial inoculant to fermenting tank 3, after the sufficient mixing of powdered microbial inoculant and nutrient solution in fermenting tank 3, after a certain time fermentation process, then realizes the expansion of microorganism, thereby can effectively save the use amount of microbial inoculant, the raw soil conveying mechanism is used to convey contaminated soil to soil mixing mechanism, and the mixing of microbial inoculant and contaminated soil is realized when soil mixing mechanism operates, thereby can realize the microbial repair of contaminated soil by microbial inoculant, the PLC controller can control the operation of first nutrient solution conveying pipeline, fermenting tank 3, second microbial inoculant conveying pipeline, powdered microbial inoculant conveying mechanism, raw soil conveying mechanism and soil mixing mechanism, so the utility model can realize the automatic operation of soil microbial remediation, and saves manpower.

[0023] On the basis of the above-mentioned embodiments, in order to facilitate the effective control of the temperature of the nutrient solution in the nutrient solution storage tank 2, so that the nutrient solution is kept within a certain temperature range, a first temperature sensor 101 is arranged in the nutrient solution storage tank 2, the first temperature sensor 101 is electrically connected with the PLC controller, a temperature control range of the nutrient solution is built in the PLC controller, the first temperature sensor 101 transmits the monitoring temperature value to the PLC controller in real time, the PLC controller compares the monitoring value with the set temperature range in real time, when the monitoring value is lower than the minimum value of the set temperature range, the PLC controller starts the heating coil to heat the nutrient solution, when the monitoring value is within the set temperature range, the PLC controller does not need to start the heating coil, when the monitoring value is greater than the maximum value of the set temperature range, the PLC controller stops the heating of the heating coil. The above control logic realizes the effective control of the temperature of the nutrient solution, thereby providing a convenient condition for the subsequent expansion of microorganisms using the nutrient solution.

[0024] On the basis of the above-mentioned embodiments, the specific implementation of the first nutrient solution conveying pipeline is that the first nutrient solution conveying pipeline includes a first pipeline 71, the first pipeline 71 realizes the through connection between the bottom of the nutrient solution storage tank 2 and the upper side of the inside of the fermentation tank 3, a first conveying pump 72, a first electric regulating valve 73 and a first flow meter 74 are sequentially connected in series on the first pipeline 71, the first conveying pump 72, the first electric regulating valve 73 and the first flow meter 74 are electrically connected with the PLC controller, the first conveying pump 72 is used to realize the conveying of the nutrient solution, the first electric regulating valve 73 is used to realize the on-off of the first pipeline 71 and the regulation of the flow of the nutrient solution, in actual application, the regulation program of the opening degree of the first electric regulating valve 73 can be set in the PLC controller, so as to realize the flow regulation of the nutrient solution in real time according to the regulation program, the first flow meter 74 can realize the real-time monitoring of the nutrient solution in the first pipeline 71, so that the PLC controller can better regulate the opening degree of the first electric regulating valve 73.

[0025] On the basis of the above embodiment, the specific implementation of the soil mixing mechanism is that the soil mixing mechanism comprises a rotary drum 4, which can rotate freely. The specific implementation technology of the rotary drum 4 to realize circumferential rolling around the axis direction is the existing technology, such as the rotary implementation technology of the rotary drum in the existing rotary drum dryer. The rotary drum 4 is in an inclined state with the inlet end higher than the outlet end. Spiral blades are arranged on the inner side wall of the rotary drum 4. In actual application, when the contaminated soil is transported into the rotary drum 4, the soil is continuously turned over in the rotary drum 4, so that the soil can be fully mixed with the microbial liquid transported into the rotary drum 4. In the process of continuous rotation of the rotary drum 4, the spiral blades are used to output the mixed soil. In order to facilitate the collection of the output mixed soil, a receiving box 42 can be arranged below the outlet end of the rotary drum 4.

[0026] On the basis of the above embodiment, the specific implementation of the second microbial liquid conveying pipeline is that the second microbial liquid conveying pipeline comprises a second pipeline 81. The liquid inlet end of the second pipeline 81 penetrates the inner bottom of the fermentation tank 3. The liquid outlet end of the second pipeline 81 extends into the inlet port of the rotary drum 4. The liquid outlet end of the second pipeline 81 is in a closed state. A plurality of liquid outlet holes 811 are arranged on the side wall of the liquid outlet end of the second pipeline 81. When there is microbial liquid in the second pipeline 81, the microbial liquid flows out from the liquid outlet holes 811, so that the microbial liquid can be mixed with the contaminated soil in the rotary drum 4. In order to facilitate the full diffusion of the microbial liquid in the rotary drum 4, the liquid outlet holes 811 are arranged on the entire side wall of the liquid outlet end of the second pipeline 81. A second conveying pump 82, a second electric regulating valve 83 and a second flow meter 84 are sequentially connected in series on the second pipeline 81. The second conveying pump 82, the second electric regulating valve 83 and the second flow meter 84 are electrically connected with the PLC controller. The second conveying pump 82 is used to convey the microbial liquid in the second pipeline 81. The second electric regulating valve 83 is used to realize the on-off and flow regulation of the second pipeline 81. The second flow meter 84 is used to realize the real-time monitoring of the flow of the microbial liquid in the second pipeline 81. The feedback data of the second flow meter 84 can be used to accurately adjust the opening degree of the second electric regulating valve 83 by the PLC controller. The average flow of the second flow meter 84 in a period of time multiplied by the time period can obtain the total amount of the microbial liquid conveyed by the second pipeline 81 into the rotary drum 4 in the time period, so as to facilitate the digital statistics of the amount of the microbial liquid.

[0027] On the basis of the above embodiment, the specific implementation of the powder microbial agent conveying mechanism is that the powder microbial agent conveying mechanism is a first screw conveyor 5. The screw conveyor is a commonly used and known technical product in the field of material conveying technology, and therefore the conveying principle and structure of the screw conveyor will not be described in detail here. The material flowing out of the discharge end of the first screw conveyor 5 falls into the agent feeding hopper 31 arranged at the upper part of the fermentation tank 3. The first screw conveyor 5 is electrically connected with the PLC controller. In actual application, the flow control of the first screw conveyor 5 can be realized by using the PLC controller to control the rotating speed of the motor of the first screw conveyor 5. Under the condition that the flow of the first screw conveyor 5 is known, the total amount control of the powder microbial agent conveyed into the fermentation tank 3 can be realized by using time as the control condition.

[0028] On the basis of the above embodiment, the specific implementation of the raw soil conveying mechanism is that the raw soil conveying mechanism is a second screw conveyor 6. The material flowing out of the discharge end of the second screw conveyor 6 enters into the feeding end of the rotary drum 4 through a soil feeding hopper 41. The second screw conveyor 6 is electrically connected with the PLC controller. In actual application, the flow control of the second screw conveyor 6 can be realized by using the PLC controller to control the rotating speed of the motor of the second screw conveyor 6. Under the condition that the flow of the second screw conveyor 6 is known, the total amount control of the contaminated soil conveyed into the rotary drum 4 can be realized by using time as the control condition.

[0029] When the contaminated soil enters into the rotary drum 4 through the soil feeding hopper 41, it is mixed with the microbial agent liquid. In order to realize the effective mixing of the contaminated soil and the microbial agent liquid in the first time, the liquid outlet end of the second pipeline 81 is located below the discharge end of the soil feeding hopper 41. In this way, the soil flowing out of the soil feeding hopper 41 directly contacts and mixes with the microbial agent liquid sprayed out of the liquid outlet end. With the continuous rotation of the rotary drum 4, the contaminated soil continuously tumbles and moves forward in the rotary drum 4. In the process of continuous tumbling and moving forward of the contaminated soil, the mixing of the contaminated soil and the microbial agent liquid is continuously realized. When the contaminated soil flows out of the discharge port of the rotary drum 2, the sufficient mixing of the microbial agent liquid and the contaminated soil is completed.

[0030] In actual application, in order to facilitate the monitoring of the liquid level and temperature in the fermentation tank 3, a second temperature sensor 102 and a first liquid level sensor 103 are arranged in the fermentation tank 3, the second temperature sensor 102 can realize real-time monitoring of the fermentation temperature in the fermentation tank 3, when the temperature is abnormal, the corresponding emergency treatment of the staff is facilitated, and the first liquid level sensor 103 realizes the monitoring of the liquid level in the fermentation tank 3, in actual application, when the first pipeline 71 continuously transports the nutrient solution into the fermentation tank 3, the first liquid level sensor 103 continuously monitors the liquid level in the fermentation tank 3, when the liquid level monitored by the first liquid level sensor 103 reaches the set value, the PLC controller can stop the first conveying pump 72, thereby realizing the height control of the liquid level in the fermentation tank 3; a stirring shaft 32 with stirring blades is further arranged in the fermentation tank 3, the stirring shaft 32 with stirring blades is driven to rotate by a motor 33, in the fermentation process, the motor 33 continuously drives the stirring shaft 32 with stirring blades to rotate, thereby facilitating the full diffusion of the powdery microbial agent in the nutrient solution, and then facilitating the rapid expansion of the microbial liquid, a third temperature sensor 104 is arranged in the feeding end of the rotary drum 4, the temperature of the feeding end of the rotary drum 4 is monitored by the third temperature sensor 104, which facilitates the staff to understand the environmental temperature when the microbial liquid is mixed with the contaminated soil, and the PLC controller is electrically connected with the second temperature sensor 102, the third temperature sensor 104, the first liquid level sensor 103 and the motor 33.

[0031] In the utility model, "upper", "lower", "front", "rear", "left", "right" are relative positions for the convenience of describing position relation, therefore cannot be understood as absolute positions for limiting the protection scope.

[0032] In addition to the technical features described in the specification, they are known technologies of the professional technical personnel.

[0033] The preferred embodiments and examples of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments and examples, and for ordinary technical personnel in the technical field, some improvements and modifications can be made without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A smart soil remediation device utilizing microorganisms, characterized in that, The system includes a control cabinet, a nutrient solution storage tank, a fermentation tank, a soil mixing mechanism, a powdered microbial agent conveying mechanism, and a soil conveying mechanism. The control cabinet houses a PLC controller. The nutrient solution storage tank contains nutrient solution, and a heating device is installed on the outer wall of the nutrient solution storage tank. A first nutrient solution conveying pipeline connects the nutrient solution storage tank and the fermentation tank. A second microbial agent conveying pipeline connects the fermentation tank and the soil mixing mechanism. The powdered microbial agent conveying mechanism delivers powdered microbial agent into the fermentation tank, and the soil conveying mechanism delivers contaminated soil into the soil mixing mechanism. The PLC controller controls the operation of the first nutrient solution conveying pipeline, the fermentation tank, the second microbial agent conveying pipeline, the powdered microbial agent conveying mechanism, the soil conveying mechanism, and the soil mixing mechanism.

2. The intelligent soil remediation device utilizing microorganisms according to claim 1, characterized in that, The heating device is a heating coil, which is spirally wound on the outer wall of the nutrient solution storage tank. The PLC controller can control the operation of the heating coil.

3. The intelligent soil remediation device utilizing microorganisms according to claim 2, characterized in that, A first temperature sensor is installed inside the nutrient solution storage tank, and the first temperature sensor is electrically connected to the PLC controller.

4. The intelligent soil remediation device utilizing microorganisms according to claim 3, characterized in that, The first nutrient solution delivery pipeline includes a first pipe that connects the bottom of the nutrient solution storage tank to the upper part of the fermentation tank. A first delivery pump, a first electric regulating valve, and a first flow meter are connected in series on the first pipe. The first delivery pump, the first electric regulating valve, and the first flow meter are electrically connected to a PLC controller.

5. The intelligent soil remediation device utilizing microorganisms according to claim 4, characterized in that, The soil mixing mechanism includes a rotary drum that can rotate freely and is distributed in an inclined state with the feed end higher than the discharge end. Helical blades are provided on the inner side wall of the rotary drum.

6. The intelligent soil remediation device utilizing microorganisms according to claim 5, characterized in that, The second microbial inoculum delivery pipeline includes a second pipe. The inlet end of the second pipe is connected to the inner bottom of the fermenter, and the outlet end of the second pipe extends into the feed port of the rotary drum. The outlet end of the second pipe is closed. Several outlet holes are provided on the side wall of the outlet end of the second pipe. A second delivery pump, a second electric regulating valve, and a second flow meter are connected in series on the second pipe. The second delivery pump, the second electric regulating valve, and the second flow meter are electrically connected to the PLC controller.

7. The intelligent soil remediation device utilizing microorganisms according to claim 6, characterized in that, The powdered microbial agent conveying mechanism is a first screw conveyor. The material flowing out of the discharge end of the first screw conveyor falls into the agent feed hopper set at the top of the fermentation tank. The first screw conveyor is electrically connected to the PLC controller.

8. The intelligent soil remediation device utilizing microorganisms according to claim 7, characterized in that, The original soil conveying mechanism is a second screw conveyor. The material flowing out of the discharge end of the second screw conveyor enters the feed end of the rotary drum through a soil feed hopper. The second screw conveyor is electrically connected to the PLC controller.

9. A smart soil remediation device utilizing microorganisms according to claim 8, characterized in that, A second temperature sensor and a first liquid level sensor are installed inside the fermentation tank. A stirring shaft with stirring blades is also installed inside the fermentation tank. The stirring shaft with stirring blades is driven by a motor. A third temperature sensor is installed inside the feed end of the rotary drum. The PLC controller is electrically connected to the second temperature sensor, the third temperature sensor, the first liquid level sensor, and the motor.

10. A smart soil remediation device utilizing microorganisms according to claim 9, characterized in that, A receiving box is provided below the discharge end of the rotary drum.

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