In-situ chemical oxidation shallow stirring excavator for soil remediation

Abstract

The utility model relates to the technical field, in particular to an in-situ chemical oxidation shallow layer stirring excavator for soil remediation, which is provided with a medicament storage device, a stirring device and a medicament spraying device are arranged on an excavator bucket, and the stirring device can uniformly stir polluted soil sprayed with medicaments. The low-cost and high-efficiency in-situ chemical oxidation remediation of the polluted soil is effectively realized; the excavator is compact in overall structure, low in manufacturing cost and capable of being widely used.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to an in-situ chemical oxidation shallow layer mixing excavator for soil repair. Background Art

[0002] With the rapid development of industrialization and urbanization, soil pollution has become a serious environmental problem facing the world. Soil pollution not only reduces the utilization value of land, but also may have serious impacts on human health through the food chain. Therefore, effective soil remediation technology is essential to restore soil quality and protect the environment.

[0003] At present, commonly used soil remediation methods include physical removal, solidification / stabilization and bioremediation. These methods have their own advantages and disadvantages, but they generally have problems such as high cost, low efficiency, complex operation or the possibility of secondary pollution. Among these methods, in-situ chemical oxidation is considered to be an effective means of soil remediation because it directly treats the soil at the contaminated site and avoids the transfer of pollutants. However, the existing in-situ chemical oxidation technology has many operational challenges, such as uneven mixing of reagents, low construction efficiency, and poor equipment mobility. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides an in-situ chemical oxidation shallow mixing excavator for soil repair, which realizes uniform mixing of reagents and efficient construction, and can not only improve the construction efficiency of shallow in-situ chemical oxidation, but also reduce construction costs.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An in-situ chemical oxidation shallow mixing excavator for soil remediation, the excavator includes an excavator body, a support arm, a reagent storage device, a drug delivery pipe and a bucket, the support arm is hinged on the excavator body, the bucket is hinged on the support arm, the reagent storage device is arranged on the excavator body; the reagent storage device and the bucket are connected through a drug delivery pipe. The bucket is composed of two half-buckets, and is provided with a stirring device and a reagent spraying device; the bucket includes a hydraulic motor, a stirring shaft, stirring blades and a drug spraying port, the outer wall of the half-bucket is provided with a hydraulic motor, the hydraulic motor is connected to the stirring shaft, the stirring shaft is detachably installed inside the half-bucket, the stirring shaft is provided with a stirring blade, and the drug spraying port is set through the bucket. The bucket can not only carry earth and stone, but also dig contaminated soil and directly spray and mix it, without sending the contaminated soil to a special mixing equipment, which effectively improves the construction efficiency and reduces the cost of contaminated soil treatment. The bucket can be loaded on an ordinary excavator and is easy to move, thereby realizing all-terrain mobile operations.

[0007] The mixing shafts in the two half-buckets and the mixing blades on the mixing shafts are evenly distributed and at an appropriate distance, so they do not interfere with each other during operation. The mixing shafts are made of highly wear-resistant alloy steel, which can withstand continuous mechanical pressure and prevent damage. The length, width and thickness of each mixing shaft are carefully designed to maximize the mixing efficiency and ensure that the contact area between the agent and the soil is maximized. The mixing paddle is fixed to the main frame of the excavator through bearings and support arms and is driven by a hydraulic motor. The operator can control the mixing speed by adjusting the hydraulic motor parameters to adapt to different types of soil and pollution levels.

[0008] Preferably, the drug storage device includes a solution tank and a solution lifting pump, and the solution tank, the solution lifting pump, the drug delivery pipe and the bucket are connected in sequence. The solution tank is provided with a solution tank level gauge, a solution tank agitator and a drug adding port. The solution tank agitator can accelerate the dissolution of solid powder and make the drug in a uniformly dissolved state. The solution tank level gauge is connected to the solution lifting pump by telecommunication. When the solution tank level gauge shows that the liquid level reaches the designed minimum liquid level, the solution lifting pump can be controlled to stop running. The drug delivery pipe is provided with a flow meter and a pressure sensor to monitor the amount of drug spraying and achieve the best soil remediation effect.

[0009] Preferably, a nozzle is detachably mounted on the medicine spray port, and the nozzle can be replaced as needed to change the spraying pattern.

[0010] Preferably, the solution tank agitator, solution lifting pump, flow meter, hydraulic motor, spray port and pressure sensor are all connected to the control panel via radio signals. The control panel can be placed in the excavator operating room or moved within the range of the radio signal to facilitate the operator to monitor and adjust relevant parameters.

[0011] The beneficial effects of the utility model are as follows: the excavator carries a reagent storage device, and a stirring device and a reagent spraying device are arranged on the bucket; the stirring device can evenly stir the contaminated soil sprayed with the reagent, thereby effectively realizing low-cost and high-efficiency in-situ chemical oxidation remediation of the contaminated soil; and the overall structure of the excavator is compact, the cost is low, and it can be widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the in-situ chemical oxidation shallow mixing excavator of the embodiment;

[0013] Figure 2 , Figure 3 They are schematic structural diagrams of the left and right halves of the excavator bucket of an embodiment respectively.

[0014] Markings in the figure: 1-solution tank, 2-dosing port, 3-solution tank level gauge, 4-solution tank mixer, 5-solution lifting pump, 6-flow meter, 7-drug delivery pipe, 8-bucket, 81-hydraulic motor, 82-stirring shaft, 83-stirring blade, 84-drug spraying port. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0016] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0017] This embodiment provides an in-situ chemical oxidation shallow mixing excavator for soil remediation, the excavator includes an excavator body, a support arm, a reagent storage device, a drug delivery pipe 7 and a bucket 8, the support arm is hinged on the excavator body, the bucket 8 is hinged on the support arm, the reagent storage device is arranged on the excavator body; the reagent storage device and the bucket 8 are connected through the drug delivery pipe 7. The bucket 8 is composed of two half-type buckets, and is provided with a stirring device and a reagent spraying device; the bucket 8 includes a hydraulic motor 81, a stirring shaft 82, a stirring blade 83 and a drug spraying port 84, the outer side wall of the half-type bucket is provided with a hydraulic motor 81, the hydraulic motor 81 is connected to the stirring shaft 82, the stirring shaft 82 is detachably installed inside the half-type bucket, the stirring shaft 82 is provided with a stirring blade 83, and the drug spraying port 84 is arranged through the bucket 8, and 1-3 drug spraying ports 84 can be evenly arranged on each half-type bucket.

[0018] The bucket can not only transport earth and stone, but also dig out contaminated soil for direct spraying and mixing. There is no need to send the contaminated soil to special mixing equipment, which effectively improves construction efficiency and reduces the cost of contaminated soil treatment. The bucket can be loaded on an ordinary excavator and is easy to move, thus realizing all-terrain mobile operations.

[0019] The mixing shafts 82 in the two half-buckets and the mixing blades 83 on the mixing shafts 82 are evenly distributed and at an appropriate distance, so they do not interfere with each other during operation. The mixing shafts 82 are made of highly wear-resistant alloy steel, which can withstand continuous mechanical pressure and prevent damage. The length, width and thickness of each mixing shaft 82 are carefully designed to maximize the mixing efficiency and ensure that the contact area between the agent and the soil is maximized. The mixing paddle is fixed to the main frame of the excavator through bearings and support arms, and is driven by a hydraulic motor 81. The operator can control the mixing speed by adjusting the parameters of the hydraulic motor 81 to adapt to different types of soil and pollution levels.

[0020] The drug storage device includes a solution tank 1 and a solution lifting pump 5, and the solution tank 1, the solution lifting pump 5, the drug delivery pipe 7 and the bucket 8 are connected in sequence. The solution tank 1 is provided with a solution tank level meter 3, a solution tank mixer 4 and a drug adding port 2. The solution tank mixer 4 can accelerate the dissolution of solid powder and make the drug in a uniformly dissolved state. The solution tank level meter 3 is connected to the solution lifting pump 5 by telecommunication. When the solution tank level meter 3 shows that the liquid level reaches the designed minimum liquid level, the solution lifting pump 5 can be controlled to stop running; the drug delivery pipe 7 is provided with a flow meter 6 and a pressure sensor, which can monitor the amount of drug spraying to achieve the best soil remediation effect.

[0021] The spray port 84 may be provided with a detachable nozzle, and the nozzle may be replaced as required to change the spraying mode.

[0022] The solution tank mixer 4, solution lifting pump 5, flow meter 6, hydraulic motor 81, medicine spraying port 84 and pressure sensor are all connected to the control panel via radio signals. The control panel can be placed in the excavator operating room or moved within the range of the radio signal to facilitate the operator to monitor and adjust relevant parameters.

[0023] Working principle of the excavator in this embodiment:

[0024] Solid or liquid medicine is added into the solution tank 1 through the medicine adding port 2, and the solution stirrer 4 is turned on to dissolve the medicine. After the dissolution is completed, the solution lifting pump 5 is turned on to deliver the medicine to the medicine sprinkling port 84 through the medicine delivery tube 7. When the liquid level meter 3 of the solution tank shows that the liquid level reaches the designed minimum liquid level, the solution lifting pump 5 can be controlled to stop running, and the signal is transmitted to the operation room. At the same time, the operator in the operation room can control the amount of medicine to be added according to the flow rate displayed by the flow meter 6.

[0025] When the in-situ chemical oxidation shallow mixing excavator moves to the designated location of the soil to be remediated, a certain amount of contaminated soil can be excavated through the bucket 8. The operator can adjust the depth of the bucket into the soil. After the bucket reaches the designated depth, the soil is excavated and closed. After the bucket is closed, the hydraulic motor 81 on the bucket is started, and the hydraulic motor 81 drives the stirring shaft 82 to rotate, and the stirring blades 83 fully stir the contaminated soil. At the same time, the spraying port 84 sprays a certain amount of reagents to chemically oxidize and remediate the contaminated soil.

[0026] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.

Claims

1. An in-situ chemical oxidation shallow mixing excavator for soil remediation, characterized in that: The excavator comprises an excavator body, a support arm, a medicine storage device, a medicine delivery pipe (7) and a bucket (8); the support arm is hinged on the excavator body, the bucket (8) is hinged on the support arm, and the medicine storage device is arranged on the excavator body; the medicine storage device and the bucket (8) are connected via the medicine delivery pipe (7); the bucket (8) is composed of two half-buckets, the bucket (8) comprises a hydraulic motor (81), a stirring shaft (82), stirring blades (83) and a medicine spraying port (84); the outer side walls of the half-buckets are each provided with a hydraulic motor (81); the hydraulic motor (81) is connected to the stirring shaft (82); the stirring shaft (82) is detachably mounted inside the half-bucket; the stirring shaft (82) is provided with a stirring blade (83); and the medicine spraying port (84) is arranged through the bucket (8).

2. The excavator according to claim 1, characterized in that: The drug storage device comprises a solution tank (1) and a solution lifting pump (5), wherein the solution tank (1), the solution lifting pump (5), a drug delivery pipe (7) and a bucket (8) are connected in sequence; the solution tank (1) is provided with a solution tank level meter (3), a solution tank stirrer (4) and a drug adding port (2), the solution tank level meter (3) is connected to the solution lifting pump (5) by telecommunication, and a flow meter (6) and a pressure sensor are provided in the drug delivery pipe (7).

3. The excavator according to claim 1 or 2, characterized in that: The spray nozzle (84) is detachably mounted on the spray port.

4. The excavator according to claim 2, characterized in that: The solution tank stirrer (4), solution lifting pump (5), flow meter (6), hydraulic motor (81), medicine spraying port (84) and pressure sensor are all connected to the control panel via radio signals.

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