Capillary collection device and method for petroleum hydrocarbons in groundwater

Abstract

The present application provides a kind of underground water petroleum hydrocarbon capillary collection device, the underground water petroleum hydrocarbon capillary collection device includes underground adsorption structure, the underground adsorption structure includes microporous vascular bundle, weight sensor and inductive pull rod are arranged on microporous vascular bundle, the structure of microporous vascular bundle is similar to the vascular bundle structure of aquatic plant, and its adsorption capacity to petroleum hydrocarbon can reach more than 150 times of natural resin, inductive pull rod is connected with microporous vascular bundle at one end, and the other end is connected with weight sensor, after weight sensor monitors weight reaches sensing threshold, inductive pull rod pulls microporous vascular bundle to rise to ground, and the adsorbed oil is removed by high-speed rotation of centrifugal device on ground, after weight sensor monitors weight reduction, microporous vascular bundle continues to enter underground adsorption and collect petroleum hydrocarbon and other pollutants under the action of inductive pull rod, the collection device can realize the efficient collection of petroleum hydrocarbon in underground water, and the one-time collection amount is large, can effectively reduce the pollution degree of underground water, and has good application prospect in the field of underground water petroleum hydrocarbon collection.

Description

Technical Field

[0001] This invention relates to the field of groundwater treatment contaminated with petroleum hydrocarbons in the environmental protection field, specifically to a capillary collection device and method for petroleum hydrocarbons in groundwater. Background Technology

[0002] Petroleum hydrocarbons are complex mixtures containing many individual components, each with its own specific chemical and toxicological properties. Some are carcinogenic, while others cause persistent pollution. Once petroleum hydrocarbons enter the environment, their migration and transformation processes are complex and varied, posing significant environmental risks to soil and groundwater, and are difficult to clean up and remediate.

[0003] Furthermore, petroleum hydrocarbon pollutants in the environment can be ingested through the mouth, skin, and other routes, harming the nervous, urinary, respiratory, circulatory, and blood systems. Long-term exposure can also damage human organs. Therefore, the potential risks of such pollutants to the ecological environment and human health have always been a focus of public concern.

[0004] The challenge in remediating and treating groundwater contaminated with petroleum hydrocarbons lies in the high volatility and difficulty in adsorption of petroleum hydrocarbons. Summary of the Invention

[0005] Based on the aforementioned technical background, the inventors have made significant progress and provided a capillary collection device for petroleum hydrocarbons in groundwater. This device includes an underground adsorption structure comprising microporous vascular bundles. A weight sensor and a sensing rod are installed on the microporous vascular bundles. The structure of the microporous vascular bundles is similar to that of aquatic plants, and its adsorption capacity for petroleum hydrocarbons can reach more than 150 times that of natural resins. The weight sensor monitors the weight. When the weight reaches a sensing threshold, the bundle rises to the ground under the action of the sensing rod. The adsorbed oil is removed by a high-speed centrifugal device on the ground. After the weight sensor detects a decrease in weight, the microporous vascular bundles continue to enter the groundwater for adsorption and collection under the action of the sensing rod. This collection device can achieve efficient collection of petroleum hydrocarbons from groundwater with a large collection volume, effectively reducing the degree of groundwater pollution and showing good application prospects.

[0006] The first aspect of the present invention is to provide a capillary collection device for petroleum hydrocarbons in groundwater, the capillary collection device for petroleum hydrocarbons in groundwater includes an underground adsorption structure, the underground adsorption structure includes a microporous vascular bundle, a weight sensor and a sensing rod are provided on the microporous vascular bundle, and a protective net sleeve is provided on the outside of the microporous vascular bundle.

[0007] A second aspect of the present invention is to provide a method for collecting petroleum hydrocarbons in groundwater using the capillary collection device for petroleum hydrocarbons in groundwater described in the first aspect of the present invention.

[0008] The collection method includes placing the underground adsorption structure of the petroleum hydrocarbon capillary collection device below the groundwater surface, starting the differential rotor, and adjusting the rotation speed of the underground adsorption structure and the rotation speed of the above-ground centrifugal structure. Attached Figure Description

[0009] Figure 1 This diagram illustrates the structure of a capillary collection device for petroleum hydrocarbons in groundwater according to a preferred embodiment of the present invention.

[0010] Figure 2 A schematic diagram of the underground adsorption structure in the collection device is shown;

[0011] Figure 3 This diagram shows a cross-sectional view of a capillary collection device for petroleum hydrocarbons in groundwater according to a preferred embodiment of the present invention.

[0012] Figure 4 A schematic diagram of the specific structure of the microporous vascular bundle of the present invention is shown. Detailed Implementation

[0013] The present invention will now be described in detail, and its features and advantages will become clearer and more apparent from these descriptions.

[0014] The first aspect of this invention provides a capillary collection device for petroleum hydrocarbons in groundwater. This device includes an underground adsorption structure comprising a microporous vascular bundle. A weight sensor and a sensing rod are mounted on the microporous vascular bundle. The weight sensor is positioned at the center of gravity inside the microporous vascular bundle and is covered by a baffle. One end of the weight sensor is connected to the microporous vascular bundle and installed above it. The other end of the sensing rod is connected to the weight sensor. A protective net sleeve is provided on the outside of the microporous vascular bundle. Figure 1 and Figure 2 As shown.

[0015] The protective net sleeve is cylindrical with holes evenly distributed at its bottom. Each hole has a diameter of 10-20 mm, preferably 15 mm, and the distance between adjacent holes is 20-30 mm, preferably 25 mm. It is used to transport collected pollutants such as petroleum hydrocarbons to the microporous vascular bundles located inside the sleeve.

[0016] The sensing rod is rod-shaped, with one end connected to the microporous vascular bundle and installed above the microporous vascular bundle, and the other end connected to the weight sensor.

[0017] The weight sensor is used to monitor the weight. When the weight exceeds a set threshold, the sensing rod is used to pull the microporous vascular bundle.

[0018] The microporous vascular bundle structure is similar to the vascular bundle structure of aquatic plants. Its absorption capacity for petroleum hydrocarbons in groundwater is more than 150 times that of natural resins, and the removal rate of benzene series pollutants can reach more than 95%. Its removal efficiency for petroleum hydrocarbons can be improved by more than 50%, achieving rapid adsorption of petroleum hydrocarbon pollutants.

[0019] The microporous vascular bundles have a generally tubular structure with the same diameter at both ends. They consist of numerous tiny tubular structures bundled together, similar to the vascular structure of aquatic plants, and are covered with many micropores. Due to the numerous bundles of tiny tubular structures and the abundance of micropores, the microporous vascular bundles have a large specific surface area, which can effectively adsorb pollutants such as petroleum hydrocarbons in groundwater. They also have a good adsorption capacity, allowing them to continuously adsorb pollutants until they are rapidly removed by centrifugation, after which the next adsorption can begin.

[0020] The microporous vascular bundles are made from non-polar resin, preferably from styrene and divinylbenzene emulsions, and more preferably from styrene and divinylbenzene emulsions, produced continuously by chloromethylation and microwave-assisted hydrothermal method. A high-temperature, high-pressure reaction environment is created by microwave heating under magnetic induction conditions using a microwave field as a heat source. 35-40g of styrene and 7-9mL of divinylbenzene are added to the reactor at once, and the reaction is carried out at 90°C for 2-3 hours to polymerize the two. If the particles harden, the reaction is intensified at 95°C for 0.5 hours, followed by cooling to 50°C, and then separation and heat treatment to obtain the product. This process achieves the polymerization reaction of the non-polar resin, forming a surface that is smooth on one side and rough with feather-like texture on the other, curled into a cylindrical shape with the smooth side on the outside. The cylinder diameter is 1cm-6cm.

[0021] The microporous vascular bundles prepared by the above method can achieve a chlorine removal rate of over 88% in the raw materials. The preparation process is non-toxic, harmless, and low-cost. Furthermore, the polymerization reaction of non-polar resins can be carried out by microwave-assisted heating, which can significantly shorten the polymerization reaction time. Compared with traditional synthesis methods, the polymerization reaction time is shortened by one to three times.

[0022] The weight sensor is used to monitor weight. When the monitored weight reaches the sensing threshold, it rises to the ground under the action of the sensing rod. The saturated microporous vascular bundles, after adsorbing petroleum hydrocarbons, rotate at high speed in the centrifuge device on the ground to remove oil. After the weight sensor detects a decrease in weight, the microporous vascular bundles re-enter the groundwater under the action of the sensing rod to continue working. This can achieve rapid collection of petroleum hydrocarbons in groundwater and effectively reduce the degree of groundwater pollution.

[0023] The capillary collection device for petroleum hydrocarbons in groundwater preferably also includes an above-ground centrifugal structure, which is located above the underground adsorption structure, such as... Figure 1 As shown.

[0024] The above-ground centrifugal structure is preferably a centrifugal separation device. This centrifugal separation device is used to remove pollutants such as petroleum hydrocarbons adsorbed by the underground adsorption structure through high-speed rotation.

[0025] The above-ground centrifugal structure is cylindrical, and its central axis coincides with that of the underground adsorption structure. The diameter of the above-ground centrifugal structure is larger than that of the underground adsorption structure.

[0026] The induction rod is connected to the ground centrifuge structure. The weight sensor is located at the top of the ground centrifuge structure. The induction rod is connected to the weight sensor. When the weight sensor detects that the weight is greater than the threshold, the microporous vascular bundle is pulled to the ground centrifuge structure for centrifugal separation through the induction rod.

[0027] According to a preferred embodiment of the present invention, the collecting device further includes a differential speed impeller located below the protective net sleeve. The ground-based centrifugal structure also includes a differential speed impeller located above it.

[0028] The differential rotor is used to adjust the rotation speed of the underground adsorption structure and the above-ground centrifugal structure, so that the rotor of the underground adsorption structure rotates at low speed on the groundwater surface to form an oil vortex. The oil and volatile organic compounds are enriched in the microporous vascular bundle material through the protective net sleeve.

[0029] The underground adsorption structure is installed on a support frame, which is rectangular in shape. Preferably, the underground adsorption structure is installed vertically on the support frame, the above-ground centrifugal structure is located above the support frame, and the holes on the protective net sleeve are all located below the support frame to avoid the support frame affecting the adsorption and removal of groundwater pollutants.

[0030] This support frame is used to support the above-ground centrifugal structure and the underground adsorption structure, separating the two structures while connecting them into a whole.

[0031] The support frame, differential wheel, and protective net sleeve are preferably made of one of the following materials: cast iron, stainless steel, or high-strength resin, with cast iron being more preferred.

[0032] A second aspect of the present invention is to provide a method for collecting petroleum hydrocarbons in groundwater using the capillary collection device for petroleum hydrocarbons in groundwater described in the first aspect of the present invention.

[0033] The collection method includes placing the underground adsorption structure of the petroleum hydrocarbon capillary collection device below the groundwater surface, starting the differential rotor, and adjusting the rotation speed of the underground adsorption structure and the rotation speed of the above-ground centrifugal structure.

[0034] The differential rotor located below the underground adsorption structure rotates at low speed in the groundwater, forming an oil vortex. The oil and volatile organic compounds are enriched in the microporous vascular bundle material through the protective net sleeve. After the vascular bundle is saturated with adsorption, the weight sensor detects that the weight has reached the sensing threshold. Under the action of the sensing rod, it rises to the ground. The saturated microporous vascular bundle is then rotated at high speed in the centrifuge device on the ground to remove the oil. After the weight decreases, the microporous vascular bundle re-enters the groundwater under the action of the sensing rod to continue working.

[0035] The differential rotor located below the underground adsorption structure rotates at a speed of 5-10 r / h, preferably 8 r / h.

[0036] The differential rotor in the ground centrifuge operates at a speed of 2000-3000 r / m, preferably 2500 r / m.

[0037] The sensing threshold monitored by the weight sensor is 100-200 g.

[0038] The collection device has a simple structure and is easy to use. It is highly efficient in collecting petroleum hydrocarbons and can achieve rapid collection of petroleum hydrocarbons from groundwater.

[0039] The beneficial effects of this invention are as follows:

[0040] (1) The capillary collection device for petroleum hydrocarbons in groundwater described in this invention includes microporous vascular bundles, which enables the removal rate of chlorine in the raw materials to reach more than 88%, thereby achieving non-toxic, harmless, low-cost, large-scale, and efficient separation and treatment of the raw materials.

[0041] (2) The collection device of the present invention uses microwave-assisted heating to carry out the polymerization reaction of non-polar resin, which greatly shortens the polymerization reaction time. The reaction time is shortened from 6-18h in the traditional method of synthesizing non-polar resin to 3-4h.

[0042] (3) The microporous vascular bundle structure in the collection device is similar to the vascular bundle structure of aquatic plants. Its petroleum hydrocarbon absorption capacity is 160 times that of natural resin, and the removal rate of benzene pollutants can reach 96%. The working efficiency can be increased by more than 50%, realizing rapid and efficient adsorption of petroleum hydrocarbon pollutants.

[0043] (4) The collection device described in this invention is simple in design, easy to use, and has high collection efficiency. After the vascular bundle is saturated with adsorption, the weight sensor detects that the weight has reached the sensing threshold. Under the action of the sensing rod, it rises to the ground. The saturated vascular bundle rotates at high speed in the centrifuge device on the ground to remove oil. After the weight decreases, the vascular bundle re-enters the ground under the action of the sensing rod to continue working, thereby realizing the rapid collection of petroleum hydrocarbons in groundwater and effectively reducing the pollution of groundwater by petroleum hydrocarbons. Example

[0044] The present invention is further illustrated by specific examples below. These embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0045] Example 1

[0046] Using a microwave field as a heat source, a high-temperature and high-pressure reaction environment is created by microwave heating under magnetic induction conditions. 35g of styrene and 7mL of divinylbenzene are added to the reactor at once, and the reaction is carried out at 90℃ for 3 hours to polymerize the two. If the particles harden, the reaction is intensified at 95℃ for 0.5 hours. The mixture is then cooled to 50℃, and after separation and heat treatment, the product is obtained, achieving the polymerization reaction of a non-polar resin. The product forms a smooth surface on one side and a feather-like rough surface on the other, curled into a cylindrical shape with the smooth surface on the outside. The cylinder diameter is 1cm-6cm.

[0047] Example 2

[0048] Adopting such Figure 1 The illustrated capillary collection device for petroleum hydrocarbons in groundwater is used to treat contaminated groundwater. This device includes an underground adsorption structure and an above-ground centrifugal structure. The above-ground centrifugal structure is located above the underground adsorption structure. The underground adsorption structure comprises microporous vascular bundles, generally in a cylindrical shape with the same diameter at both ends. It consists of numerous small tubular structures bundled together, similar to the vascular bundle structure of aquatic plants, and is covered with numerous micropores. The microporous vascular bundles are made of the non-polar resin prepared in Example 1. A protective net sleeve is installed on the outside of the microporous vascular bundles. The protective net sleeve is cylindrical and has numerous evenly distributed holes at its bottom. Each hole has a diameter of 10-20 mm, preferably 15 mm, and the distance between adjacent holes is 20-30 mm. The sensing rod is rod-shaped, with one end connected to the microporous vascular bundle and installed above it. A weight sensor is located at the center of gravity inside the microporous vascular bundle and is covered by a baffle. The other end of the sensing rod is connected to the weight sensor. The above-ground centrifugal structure is a centrifugal separation device, cylindrical in shape, coinciding with the central axis of the underground adsorption structure. The diameter of the above-ground centrifugal structure is 10-15 cm larger than that of the underground adsorption structure. The weight sensor is located at the top of the above-ground centrifugal structure. A differential wheel is located below the protective net sleeve, and another differential wheel is located above the above-ground centrifugal structure. The underground adsorption structure is vertically mounted on a support frame, which is rectangular in shape. The above-ground centrifugal structure is located above the support frame, and the holes in the protective net sleeve are all located below the support frame. The support frame, differential wheel, and protective net sleeve are all made of cast iron.

[0049] The underground adsorption structure of the petroleum hydrocarbon capillary collection device is placed below the groundwater surface. The differential rotor is activated, with the rotor below the underground adsorption structure rotating at 5-10 r / h, and the differential rotor in the above-ground centrifuge rotating at 2000-3000 r / m. The sensing threshold of the weight sensor is 100g. When the weight sensor detects that the weight has reached the threshold, it rises to the ground under the action of a sensing rod. The adsorbed and saturated microporous vascular bundles are then subjected to high-speed rotation in the above-ground centrifuge to remove oil. After the weight decreases, the microporous vascular bundles re-enter the groundwater under the action of the sensing rod to continue their function.

[0050] Tests have shown that this capillary collection device for petroleum hydrocarbons in groundwater achieves a removal rate of over 50%, and a removal rate of over 96% for benzene series pollutants such as 1,3-dinitrobenzene, 1,4-dichlorobenzene, benzene, o-(p-)nitrobenzene, and chlorobenzene. This system can be used for the treatment of contaminated groundwater from gas stations and chemical plants, and can also be extended to groundwater remediation in mining areas, urban groundwater resource remediation, and contaminated site remediation.

[0051] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this invention. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] The present invention has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present invention based on these embodiments, all of which fall within the scope of protection of the present invention.

Claims

1. A capillary collection device for petroleum hydrocarbons in groundwater, characterized in that, The capillary collection device for petroleum hydrocarbons in groundwater includes an underground adsorption structure, which includes a microporous vascular bundle. A weight sensor and a sensing rod are installed on the microporous vascular bundle, and a protective net sleeve is installed on the outside of the microporous vascular bundle. The microporous vascular bundle structure resembles the vascular bundle structure of aquatic plants; the microporous vascular bundle is made of non-polar resin, using styrene and divinylbenzene emulsion as raw materials; it forms a smooth surface on one side and a feather-like rough surface on the other side, curled into a cylindrical shape; The collection device also includes a differential speed wheel, which is located below the protective net sleeve; The differential rotor is used to adjust the rotation speed of the underground adsorption structure and the above-ground centrifugal structure, so that the rotor of the underground adsorption structure rotates at low speed on the groundwater surface to form an oil vortex, and the oil and volatile organic compounds are enriched in the microporous vascular bundle material through the protective net sleeve. The differential rotor located below the underground adsorption structure rotates at a speed of 5-10 r / h; The weight sensor is located at the center of gravity inside the microporous vascular bundle; The sensing rod is rod-shaped, with one end connected to the microporous vascular bundle and installed above the microporous vascular bundle, and the other end connected to the weight sensor. The capillary collection device for petroleum hydrocarbons in groundwater also includes an above-ground centrifugal structure, which is located above the underground adsorption structure. The above-ground centrifugal structure is cylindrical, and its central axis coincides with that of the underground adsorption structure. The diameter of the above-ground centrifugal structure is larger than that of the underground adsorption structure. The differential rotor in the ground-based centrifuge operates at a speed of 2000-3000 r / m.

2. The capillary collection device for petroleum hydrocarbons in groundwater according to claim 1, characterized in that, The protective net sleeve is cylindrical in shape and has holes all over its bottom.

3. The capillary collection device for petroleum hydrocarbons in groundwater according to claim 1, characterized in that, The collection device also includes a support frame, on which the underground adsorption structure is installed. The support frame is rectangular in shape.

4. The capillary collection device for petroleum hydrocarbons in groundwater according to claim 1, characterized in that, The underground adsorption structure is vertically installed on the support frame, the above-ground centrifugal structure is located above the support frame, and the holes on the protective net sleeve are all located below the support frame.

5. A method for collecting petroleum hydrocarbons in groundwater using the capillary collection device for petroleum hydrocarbons in groundwater as described in any one of claims 1 to 4; The collection method includes placing the underground adsorption structure of the petroleum hydrocarbon capillary collection device in the groundwater below the groundwater surface, starting the differential rotor, and adjusting the rotation speed of the underground adsorption structure and the rotation speed of the above-ground centrifugal structure.

6. The collection method according to claim 5, characterized in that, The differential rotor located below the underground adsorption structure rotates at a speed of 5-10 r / h; The differential rotor in the ground-based centrifuge operates at a speed of 2000-3000 r / m.

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