Soil pollution treatment device

Abstract

The utility model belongs to the technical field of soil remediation and improvement, and particularly relates to a soil pollution treatment device. According to the technical scheme, the soil pollution treatment device comprises a soil pollution treatment tank body, and the top of the soil pollution treatment tank body is connected with a slurry liquid inlet pipe used for inputting slurry to be treated; a driving motor is mounted at the top of the soil pollution treatment tank body, the output end of the driving motor is connected with a rotating shaft, and a stirring paddle is fixed on the rotating shaft; an oxidant leacheate pipe is arranged on the soil pollution treatment tank body; a heating pipe is mounted in the soil pollution treatment tank body; the top of the soil pollution treatment tank body is connected with a vacuum exhaust pipe, and a conveying belt is installed in the lower portion of the soil pollution treatment tank body. The utility model provides a soil pollution treatment device. Vapor and treated slurry are separated through thermal desorption treatment and oxidation treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil restoration and improvement, and particularly relates to a soil pollution treatment device. Background Art

[0002] With the development of industry and agriculture, soil pollution is becoming increasingly serious. Pollution sources include industrial emissions, agricultural activities, urban sewage and solid waste treatment. There are many types of pollutants, including organic pollutants (such as pesticides, petroleum hydrocarbons, PAHs, etc.) and inorganic pollutants (such as heavy metals, arsenic, chromium, etc.). Once these pollutants enter the soil, they are not only difficult to degrade naturally, but may also endanger human health through the food chain.

[0003] However, the soil in many areas has problems such as poor structure, lack of nutrients, excessive harmful substances, etc., which cannot meet the requirements of crop growth. At present, the methods of soil improvement mainly include physical, chemical and biological means, but there are problems such as complex implementation, high cost and unstable effect.

[0004] At present, the main methods for soil pollution remediation are physical, chemical and biological remediation technologies. However, these traditional remediation methods have the following main problems:

[0005] 1) Low efficiency: Traditional methods usually take a long time to significantly reduce the concentration of soil pollutants, which is difficult to meet the urgent needs in practical applications.

[0006] 2) High cost: Many repair methods require expensive equipment and reagents, and the overall repair cost is high, which limits large-scale application.

[0007] 3) Secondary pollution: Some methods may cause secondary pollution during the restoration process, such as residual chemical reagents or substandard discharge of treated waste liquids, further polluting the environment.

[0008] 4) Poor applicability: Some remediation technologies are more effective for specific types of pollutants, but have limited effects on the remediation of complex polluted soils and cannot meet the needs of complex polluted environments. Utility Model Content

[0009] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide a soil pollution treatment device, which separates water vapor and treated mud through thermal desorption treatment and oxidation treatment.

[0010] The technical solution adopted by the utility model is:

[0011] A soil pollution treatment device comprises a soil pollution treatment tank body, the top of which is connected to a mud inlet pipe for inputting mud to be treated; a driving motor is installed on the top of the soil pollution treatment tank body, the output end of the driving motor is connected to a rotating shaft, and a stirring paddle is fixed on the rotating shaft; an oxidant washing liquid pipe is arranged on the soil pollution treatment tank body; a heating pipe is installed in the soil pollution treatment tank body; a vacuum exhaust pipe is connected to the top of the soil pollution treatment tank body, and a conveyor belt is installed in the lower part of the soil pollution treatment tank body.

[0012] The mud to be treated is sent into the soil pollution treatment tank through the mud inlet pipe, the oxidant solution is added through the oxidant rinse pipe, the heating pipe is heated, and the driving motor drives the stirring paddle to fully stir the mud and the oxidant solution. The water vapor generated after heating in the soil pollution treatment tank is pumped into the water vapor treatment device through the vacuum exhaust pipe, and the oxidized mud is sent to the soil improvement device from the bottom through the feed crawler. The utility model separates water vapor and treated mud through thermal desorption and oxidation treatment, and the subsequent device further treats the separated water vapor and mud.

[0013] As a preferred solution of the utility model, a soil pollution treatment vibration mechanism is installed at the bottom of the soil pollution treatment tank body. The soil pollution treatment vibration mechanism vibrates the soil pollution treatment tank body to facilitate the mud in the soil pollution treatment tank body to fall off and maintain the effective reaction volume in the soil pollution treatment tank body.

[0014] As a preferred embodiment of the utility model, the soil pollution treatment vibration mechanism includes a plurality of soil pollution treatment vibration table pillars connected to the bottom of the soil pollution treatment tank body, soil pollution treatment springs are installed inside the soil pollution treatment vibration table pillars, and a soil pollution treatment vibration generating device is installed at the bottom of the soil pollution treatment tank body.

[0015] As a preferred embodiment of the utility model, the rotating shaft is a hollow structure, and the part of the rotating shaft extending into the soil pollution treatment tank body is provided with a plurality of leaching liquid nozzles, and one end of the rotating shaft extending out of the soil pollution treatment tank body is connected to a liquid inlet pipe through a rotating sealing joint, and the other end of the liquid inlet pipe is connected to the output end of the driving motor through a rotating sealing joint, and the oxidant leaching liquid pipe is connected to the liquid inlet pipe. The oxidant leaching liquid pipe delivers the oxidant solution to the liquid inlet pipe, and the oxidant solution then enters the hollow rotating shaft through the liquid inlet pipe, and finally is sprayed out through the leaching liquid nozzle on the rotating shaft. The oxidant solution is sprayed out from the leaching liquid nozzle on the rotating shaft to ensure that the oxidant solution can be fully and evenly mixed with the mud.

[0016] As a preferred embodiment of the utility model, the oxidant solution input into the oxidant washing liquid tube has an oxidant concentration and a COD concentration in the mud that meet the following requirements: when the pollution is mild, the oxidant concentration: COD = 2:1 to 10:1; when the pollution is moderate, the oxidant concentration: COD = 5:1 to 20:1; when the pollution is severe, the oxidant concentration: COD = 10:1 to 20:1; wherein, mild pollution means that the COD content in the mud is 0 to 1000 mg / kg, moderate pollution means that the COD content in the mud is 1001 to 10000 mg / kg, and severe pollution means that the COD content in the mud is above 10000 mg / kg.

[0017] As a preferred embodiment of the present invention, the oxidant is one of hydrogen peroxide, persulfate, peracetic acid, and periodate.

[0018] As a preferred solution of the utility model, the oxidant solution in the oxidant eluent tube is mixed with 2% to 5% volume fraction of O3.

[0019] As a preferred solution of the utility model, the mud inlet pipe has a built-in suction pump, and the mud inlet pipe is connected to a closing valve which is closed after the delivery is completed.

[0020] As a preferred solution of the utility model, a sealing device is provided between the rotating shaft and the soil pollution treatment tank body.

[0021] As a preferred embodiment of the utility model, the lower part of the soil pollution treatment tank is a mud preparation box, the conveyor belt is installed in the mud preparation box, and a closed gate is installed on the upper side of the mud preparation box, which is closed before mud transportation to keep the soil pollution treatment tank airtight.

[0022] The beneficial effects of the utility model are:

[0023] The mud to be treated is sent into the soil pollution treatment tank through the mud inlet pipe, the oxidant solution is added through the oxidant rinse pipe, the heating pipe is heated, and the driving motor drives the stirring paddle to fully stir the mud and the oxidant solution. The water vapor generated after heating in the soil pollution treatment tank is pumped into the water vapor treatment device through the vacuum exhaust pipe, and the oxidized mud is sent to the soil improvement device from the bottom through the feed crawler. The utility model separates water vapor and treated mud through thermal desorption and oxidation treatment, and the subsequent device further treats the separated water vapor and mud. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a cross-sectional view of the utility model.

[0026] In the figure: 1-soil pollution treatment tank; 2-mud inlet pipe; 3-driving motor; 4-rotating shaft; 5-oxidant eluent pipe; 6-heating pipe; 7-vacuum exhaust pipe; 8-conveyor belt; 9-soil pollution treatment vibration mechanism; 11-mud preparation box; 12-closing gate; 21-closing valve; 41-stirring paddle; 42-sealing device; 43-eluent nozzle; 44-liquid inlet pipe; 91-soil pollution treatment vibration table support; 92-soil pollution treatment vibration generating device. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0029] like Figure 1 and Figure 2 As shown, the soil pollution treatment device of this embodiment includes a soil pollution treatment tank body 1, and the top of the soil pollution treatment tank body 1 is connected to a mud liquid inlet pipe 2 for inputting mud to be treated; a driving motor 3 is installed on the top of the soil pollution treatment tank body 1, and the output end of the driving motor 3 is connected to a rotating shaft 4, and a stirring paddle 41 is fixed on the rotating shaft 4; an oxidant elution liquid pipe 5 is arranged on the soil pollution treatment tank body 1; a heating pipe 6 is installed in the soil pollution treatment tank body 1; a vacuum exhaust pipe 7 is connected to the top of the soil pollution treatment tank body 1, and the other end of the vacuum exhaust pipe 7 is connected to a water vapor treatment device; a conveyor belt 8 is installed in the lower part of the soil pollution treatment tank body 1, and the output end of the conveyor belt 8 is arranged close to the feeding end of the feeding crawler.

[0030] The mud to be treated is sent into the soil pollution treatment tank 1 through the mud inlet pipe 2, the oxidant solution is added through the oxidant rinse pipe 5, the heating pipe 6 is heated, and the driving motor 3 drives the stirring paddle 41 to fully stir the mud and the oxidant solution. The water vapor generated after heating in the soil pollution treatment tank 1 is pumped into the water vapor treatment device through the vacuum exhaust pipe 7, and the oxidized mud is sent to the soil improvement device from the bottom through the feed crawler. The utility model separates water vapor and treated mud through thermal desorption and oxidation treatment, and the subsequent device further treats the separated water vapor and mud.

[0031] It should be noted that a certain concentration of oxidant solution should be mixed in advance. Generally, when the pollution is mild, the oxidant concentration is: COD = 2:1~10:1; when the pollution is moderate, the oxidant concentration is: COD = 5:1~20:1; when the pollution is severe, the oxidant concentration is: COD = 10:1~20:1.

[0032] The oxidant can be hydrogen peroxide, persulfate, peracetic acid, periodate, etc., and the concentration is determined according to the COD concentration of the mud on site. Mild pollution: COD is around a few hundred mg / kg. This type of soil usually contains a small amount of organic pollutants, which may come from mild agricultural waste or urban green space. Moderate pollution: COD is around a few thousand mg / kg. This type of soil is usually moderately polluted, which may come from the leakage of domestic sewage or small-scale industrial emissions. Severe pollution: COD exceeds 10,000 mg / kg. This type of soil is usually severely polluted, which may come from large-scale industrial waste, oil spills or heavily polluted industrial wastewater.

[0033] The pre-mixed oxidant solution is generally mixed with 2% to 5% volume fraction of O3.

[0034] The mud inlet pipe 2 has a built-in suction pump, which is closed after the delivery is completed. After all the mud is processed, the mud can be replaced with clean water and discharged from the mud inlet pipe 2, and then the stirring paddle 41 is opened for cleaning. The mud inlet pipe 2 is connected to a closing valve 21, which is closed after the delivery is completed. A sealing device 42 is provided between the rotating shaft 4 and the soil pollution treatment tank body 1. The heating pipe 6 is set close to the soil pollution treatment tank body 1, and the soil temperature is controlled to 80-100°C after heating.

[0035] The lower part of the soil pollution treatment tank 1 is a mud preparation box 11. The concentration of the prepared mud is determined according to the original soil COD concentration. The conveyor belt 8 is installed in the mud preparation box 11. A closed gate 12 is installed on the upper side of the mud preparation box 11, which is closed before the mud is transported to keep the soil pollution treatment tank 1 airtight. After the reaction is completed, the sealed gate is opened and the mud falls onto the conveyor belt 8. In order to facilitate transportation and subsequent soil improvement treatment, the moisture content of the mud after the reaction is maintained at 10% to 20%.

[0036] Furthermore, the soil pollution treatment device 1 further includes a soil pollution treatment vibration mechanism 9, which includes a plurality of soil pollution treatment vibration platform pillars 91 connected to the bottom of the soil pollution treatment tank body 1, a soil pollution treatment spring is installed inside the soil pollution treatment vibration platform pillar 91, and a soil pollution treatment vibration generating device 92 is installed at the bottom of the soil pollution treatment tank body 1. The soil pollution treatment vibration mechanism 9 vibrates the soil pollution treatment tank body 1 to facilitate the slurry in the soil pollution treatment tank body 1 to fall off and maintain the effective reaction volume in the soil pollution treatment tank body 1.

[0037] The rotating shaft 4 is a hollow structure. The portion of the rotating shaft 4 extending into the soil pollution treatment tank 1 is provided with a plurality of eluent nozzles 43. One end of the rotating shaft 4 extending out of the soil pollution treatment tank 1 is connected to a liquid inlet pipe 44 through a rotary sealing joint. The other end of the liquid inlet pipe 44 is connected to the output end of the driving motor 3 through a rotary sealing joint. The oxidant eluent pipe 5 is connected to the liquid inlet pipe 44. The oxidant eluent pipe 5 delivers the oxidant solution to the liquid inlet pipe 44, and the oxidant solution then enters the hollow rotating shaft 4 through the liquid inlet pipe 44, and finally is sprayed out through the eluent nozzle 43 on the rotating shaft 4. The oxidant solution is sprayed out from the eluent nozzle 43 on the rotating shaft 4, ensuring that the oxidant solution can be fully and evenly mixed with the mud.

[0038] The present utility model is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.

Claims

1. A soil pollution treatment device, characterized in that: The invention comprises a soil pollution treatment tank body (1), the top of which is connected to a mud inlet pipe (2) for inputting mud to be treated; a driving motor (3) is installed on the top of the soil pollution treatment tank body (1), the output end of the driving motor (3) is connected to a rotating shaft (4), and a stirring paddle (41) is fixed on the rotating shaft (4); an oxidant washing liquid pipe (5) is arranged on the soil pollution treatment tank body (1); a heating pipe (6) is installed in the soil pollution treatment tank body (1); a vacuum exhaust pipe (7) is connected to the top of the soil pollution treatment tank body (1), and a conveyor belt (8) is installed in the lower part of the soil pollution treatment tank body (1).

2. A soil pollution treatment device according to claim 1, characterized in that: A soil pollution treatment vibration mechanism (9) is installed at the bottom of the soil pollution treatment tank (1).

3. A soil pollution treatment device according to claim 2, characterized in that: The soil pollution treatment vibration mechanism (9) comprises a plurality of soil pollution treatment vibration platform pillars (91) connected to the bottom of the soil pollution treatment tank (1), soil pollution treatment springs are installed inside the soil pollution treatment vibration platform pillars (91), and a soil pollution treatment vibration generating device (92) is installed at the bottom of the soil pollution treatment tank (1).

4. A soil pollution treatment device according to claim 1, characterized in that: The rotating shaft (4) is a hollow structure. The portion of the rotating shaft (4) extending into the soil pollution treatment tank (1) is provided with a plurality of eluent nozzles (43). One end of the rotating shaft (4) extending out of the soil pollution treatment tank (1) is connected to a liquid inlet pipe (44) via a rotary sealing joint. The other end of the liquid inlet pipe (44) is connected to the output end of the driving motor (3) via a rotary sealing joint. The oxidant eluent pipe (5) is connected to the liquid inlet pipe (44).

5. The soil pollution treatment device according to claim 1, characterized in that: An oxidant solution is input into the oxidant eluent pipe (5), wherein the oxidant is one of hydrogen peroxide, persulfate, peracetic acid and periodate.

6. The soil pollution treatment device according to claim 1, characterized in that: The mud liquid inlet pipe (2) has a built-in suction pump, and the mud liquid inlet pipe (2) is connected to a closing valve (21).

7. The soil pollution treatment device according to claim 1, characterized in that: A sealing device (42) is provided between the rotating shaft (4) and the soil pollution treatment tank body (1).

8. A soil pollution treatment device according to any one of claims 1 to 7, characterized in that: The lower part of the soil pollution treatment tank (1) is a mud preparation box (11), the conveyor belt (8) is installed in the mud preparation box (11), and a closed gate (12) is installed on the upper side of the mud preparation box (11).

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