Restoration device for semi-volatile organic compound polluted site

Abstract

The utility model discloses a repairing device for a semi-volatile organic compound polluted site. The repairing device comprises a heating and extracting mechanism, the PLC control system is connected with the heating extraction mechanism; the data analyzer is connected with the PLC control system; the extraction control box is connected with the heating extraction mechanism and the PLC control system; the gas-liquid separation mechanism is connected with the extraction control box; the collecting tank is connected with the gas-liquid separation mechanism; the infusion pump is connected with the collecting tank; the sewage treatment mechanism is connected with the infusion pump; the vacuum pump is connected with the gas-liquid separation mechanism; the tail gas treatment mechanism is connected with the vacuum pump; and the exhaust pipe is connected with the tail gas treatment mechanism. According to the remediation device for the semi-volatile organic compound contaminated site, heat is transmitted to the periphery in a heat radiation mode, analysis and volatilization of target pollutants are accelerated, and the effect of rapidly removing the target pollutants in a soil system is achieved.

Description

Technical Field

[0001] The utility model relates to the field of site repair devices, in particular to a semi-volatile organic matter polluted site repair device. Background Art

[0002] Semi-volatile organic compound soil pollution mainly comes from leakage during oil extraction and production of its products, oil storage, transportation and sales.

[0003] Soil volatile organic compound pollution vapor extraction (SVE) is a commonly used technical means for the remediation and treatment of volatile organic compound pollution in soil. This method mainly uses a vacuum pump installed on the ground to create negative pressure in the equipment and underground environment, so as to promote the air flow in the aeration zone to pass through the soil contaminated by volatile organic pollutants, desorb volatile organic pollutants from the soil, and carry volatile organic pollutants away from the contaminated soil through the entrainment effect of the air flow passing through the soil aeration zone, and finally achieve the purpose of removing volatile organic compounds through the exhaust gas treatment device installed on the ground.

[0004] Patent CN105499263A discloses a heat-enhanced soil vapor extraction system, including a heating system and an extraction system. The heating system uses solar energy as an energy source, which reduces the energy consumption during the restoration process. The heating system is highly dependent on the external environment. When the sunlight is insufficient, it is difficult for the system to fail to work. In addition, the energy generated by solar energy is limited. First, it cannot meet the needs of long-term work, and second, it cannot support high-intensity work.

[0005] Patent CN207357786U discloses a contaminated soil ex situ remediation system with steam indirect heating and enhanced gas phase extraction, including a steam indirect heating system, a soil gas phase extraction system, and a soil remediation box. Although the system improves the gas phase extraction efficiency by steam indirect heating, the heating pipe and the exhaust are distributed in the soil remediation box, which increases the difficulty of putting in and removing the contaminated soil and the remediation treatment amount of the box at one time is small. In addition, steam indirect heating will generate a large amount of heat energy loss during the transmission process, reducing energy utilization. Utility Model Content

[0006] The utility model aims at the deficiencies existing in the prior art and provides a semi-volatile organic compound contaminated site repair device to solve the problems existing in the prior art.

[0007] The purpose of the utility model is achieved in the following way: a semi-volatile organic compound contaminated site remediation device, comprising:

[0008] Heating extraction mechanism;

[0009] A PLC control system connected to the heating and extraction mechanism;

[0010] A data analyzer connected to the PLC control system;

[0011] An extraction control box, connected to the heating extraction mechanism and to the PLC control system;

[0012] A gas-liquid separation mechanism connected to the extraction control box;

[0013] A collecting tank connected to the gas-liquid separation mechanism;

[0014] A liquid pump connected to the collection tank;

[0015] A sewage treatment mechanism connected to the liquid extraction pump;

[0016] A vacuum pump connected to the gas-liquid separation mechanism;

[0017] An exhaust gas treatment mechanism connected to the vacuum pump;

[0018] An exhaust pipe is connected to the exhaust gas treatment mechanism.

[0019] As an optional solution of the technical solution of the utility model, the heating extraction mechanism includes:

[0020] An extraction well, connected to the extraction control box, for extracting pollutants;

[0021] A mounting block connected to the extraction well;

[0022] a heating well connected to the mounting block and to the extraction control box for heating the area around it;

[0023] The temperature and pressure sensor is connected to the mounting block and the PLC control system, and is used to detect the temperature and pressure of the site when the extraction well and the heating well are working.

[0024] The beneficial effects of the utility model are:

[0025] (1) The heat conduction heating of the utility model is mainly achieved by installing a vertical heating well, using the heating well as a heat source to transfer heat to the soil. The heat is then transferred to the surrounding areas through thermal radiation with the heating well as the center. In areas far away, the heat is transferred by heat conduction, waiting for the temperature of the repaired soil to rise, accelerating the decomposition and volatilization of the target pollutants, and increasing the concentration of the target pollutants in the soil gas phase. Then, the tail gas from the extraction well is separated from the soil system, and finally the target pollutants in the soil system are removed.

[0026] (2) The heating well includes a heater with a metal resistance heating element. The soil can be heated to a temperature lower than, equal to or higher than the temperature of water by thermal conduction heating. The ground PLC control system can be precisely controlled by means of a thermal sensor. The heating well can operate in the range of 400°C to 800°C, with an upper limit set at 900°C.

[0027] (3) The PLC control system transmits and receives temperature and pressure data in the underground environment in real time by receiving temperature and pressure sensor devices pre-buried in the underground environment. When the temperature reaches the boiling point of the set pollutant, the signal is transmitted to the power supply system, and the temperature of the underground environment is maintained by reducing or even interrupting the current. In addition, when the pollutants are desorbed or decomposed, they will affect the pressure change of the underground environment. By analyzing the data, when the pollutant concentration is high, the extraction system is turned on in time. When the pollutant concentration decreases, or even when the underground environment is under negative pressure, the extraction system is turned off in time. After the pollutants are desorbed again or the underground is replenished with air, the extraction system is turned on again to achieve effective utilization of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of a semi-volatile organic compound contaminated site remediation device according to Example 1 of the utility model;

[0030] Reference numerals:

[0031] 11. Mounting block; 12. Extraction well; 13. Heating well; 14. Temperature and pressure sensor; 2. PLC control system; 3. Data analyzer; 4. Extraction control box; 5. Gas-liquid separation mechanism; 6. Collection tank; 7. Liquid extraction pump; 8. Sewage treatment mechanism; 9. Vacuum pump; 10. Exhaust gas treatment mechanism; 111. Exhaust pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, a connection through an intermediate medium, or a communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Example 1

[0036] like Figure 1 As shown, a semi-volatile organic compound contaminated site remediation device includes: a heating extraction mechanism, a PLC control system 2, a data analyzer 3, an extraction control box 4, a gas-liquid separation mechanism 5, a collection tank 6, a liquid extraction pump 7, a sewage treatment mechanism 8, a vacuum pump 9, a tail gas treatment mechanism 10, and an exhaust pipe 111, wherein: the PLC control system 2 is connected to the heating extraction mechanism; the data analyzer 3 is connected to the PLC control system 2; the extraction control box 4 is connected to the heating extraction mechanism and to the PLC control system 2; the gas-liquid separation mechanism 5 is connected to the extraction control box 4; the collection tank 6 is connected to the gas-liquid separation mechanism 5; the liquid extraction pump 7 is connected to the collection tank 6; the sewage treatment mechanism 8 is connected to the liquid extraction pump 7; the vacuum pump 9 is connected to the gas-liquid separation mechanism 5; the tail gas treatment mechanism 10 is connected to the vacuum pump 9; and the exhaust pipe 111 is connected to the tail gas treatment mechanism 10.

[0037] Specifically, the heating extraction mechanism includes: an extraction well 12, a mounting block 11, a heating well 13, and a temperature and pressure sensor 14, wherein: the extraction well 12 is connected to the extraction control box 4 for extracting pollutants; the mounting block 11 is connected to the extraction well 12; the heating well 13 is connected to the mounting block 11 and the extraction control box 4 for heating the surrounding area; the temperature and pressure sensor 14 is connected to the mounting block 11 and the PLC control system 2. It is used to detect the temperature and pressure of the area when the extraction well 12 and the heating well 13 are working. The heating well 13 heats the extraction area around it, and the temperature and pressure sensor 14 senses the temperature and pressure of the extraction area and transmits the data to the PLC control system 2 and the data analyzer 3. The data analyzer 3 analyzes the data and transmits it to the PLC control system 2 system; when the temperature and pressure meet the extraction requirements, the PLC control system 2 controls the operation of the extraction well 12; when the temperature and pressure exceed the upper limit, the PLC control system 2 controls the heating well 13 to stop heating; when the temperature and pressure are lower than the lower limit, the PLC control system 2 controls the operation of the heating well 13 to heat the heating extraction area.

[0038] The working process of this embodiment is as follows: first, the heating well 13 increases the extraction area to the temperature required for extraction; then, the PLC control system 2 controls the operation of the extraction well 12 to extract the pollutants; then, the pollutants are transported to the collection tank 6 through the extraction control box 4; then, the liquid pollutants are transported to the sewage treatment mechanism 8 through the liquid pump 7, and are discharged after being treated by the sewage treatment mechanism 8 to meet the emission requirements; at the same time, the liquid pollutants are transported to the exhaust gas treatment mechanism 10 through the vacuum pump 9, and are discharged through the exhaust pipe 111 after being treated by the exhaust gas treatment mechanism 10 to meet the emission requirements.

[0039] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. A semi-volatile organic compound contaminated site remediation device, characterized in that: include: Heating extraction mechanism; A PLC control system (2) connected to the heating and extraction mechanism; A data analyzer (3) connected to the PLC control system (2); An extraction control box (4) connected to the heating extraction mechanism and to the PLC control system (2); A gas-liquid separation mechanism (5) connected to the extraction control box (4); A collecting tank (6) connected to the gas-liquid separation mechanism (5); A liquid pump (7) connected to the collection tank (6); A sewage treatment mechanism (8) connected to the liquid extraction pump (7); A vacuum pump (9) connected to the gas-liquid separation mechanism (5); An exhaust gas treatment mechanism (10) connected to the vacuum pump (9); An exhaust pipe (111) is connected to the exhaust gas treatment mechanism (10).

2. A semi-volatile organic compound contaminated site remediation device according to claim 1, characterized in that: The heating extraction mechanism comprises: An extraction well (12), connected to the extraction control box (4), for extracting pollutants; A mounting block (11) connected to the extraction well (12); A heating well (13), connected to the mounting block (11) and the extraction control box (4), for heating the area around it; A temperature and pressure sensor (14) is connected to the mounting block (11) and the PLC control system (2); and is used to detect the temperature and pressure of the site when the extraction well (12) and the heating well (13) are working.

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