Management and control device for treating volatile organic compounds in underground water

Abstract

The utility model relates to a management and control device for treating volatile organic compounds in underground water, which comprises a first screen pipe arranged in an underground water monitoring well, a plurality of second screen pipes arranged in a backflow well and a monitoring and processing mechanism arranged on the ground, the monitoring treatment mechanism comprises a first water pump, a mixed reaction tank, an adjusting tank, a second water pump and an up-flow anaerobic sludge reactor which are sequentially communicated through pipelines, a dosing tank is arranged near the mixed reaction tank, and a water outlet of the up-flow anaerobic sludge reactor is communicated with the backflow well through a pipeline; the monitoring and processing mechanism further comprises an inflow water quality monitor and an outflow water quality monitor. The system has the advantages that the monitoring and processing mechanism has double functions of monitoring and processing, adopts dynamic management and control, has the advantages of large processing capacity and high efficiency, can ensure that the standard exceeding condition of volatile organic compounds in underground water at a monitoring point can be found in time and effectively removed, and can also remove sulfate byproducts generated by processing the volatile organic compounds; and secondary pollution to the environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater remediation and treatment, specifically relating to a control device for treating volatile organic compounds in groundwater. Background Technology

[0002] Current groundwater pollution control measures often focus on single monitoring technologies or management methods, lacking a dynamic control framework. The closure of businesses in an industrial park does not eliminate the potential for further groundwater pollution. Groundwater from adjacent businesses within the industrial park interacts with each other; due to groundwater migration and surface runoff, pollutants migrate in the soil and groundwater. Therefore, groundwater monitoring of businesses in industrial parks should fully consider the impact of neighboring businesses, and the monitoring should comprehensively include potential pollutants from these businesses. Preliminary work should be based on a clear understanding of the company's raw material usage, product output, and production process, identifying raw materials, wastewater, exhaust gas, and solid waste generated during production, and selecting characteristic pollutants for monitoring. To achieve the monitoring and remediation of organic pollutants in groundwater, a comprehensive control device is necessary. Utility Model Content

[0003] This utility model provides a control device for treating volatile organic compounds in groundwater, which aims to effectively monitor and treat volatile organic compounds in groundwater.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A control device for treating volatile organic compounds in groundwater includes a first screen tube installed in a groundwater monitoring well, several second screen tubes installed in a return well, and a monitoring and treatment mechanism installed on the ground for pumping out, detecting, treating, and returning water from the monitoring well to the return well. The monitoring and treatment mechanism includes a first water pump, a mixing reaction tank, a regulating tank, a second water pump, and an upflow anaerobic sludge reactor connected in sequence by pipelines. The first water pump is used to pump out groundwater from the first screen tube and send it into the mixing reaction tank. A dosing tank for adding treatment agents is provided near the mixing reaction tank. The outlet of the upflow anaerobic sludge reactor is connected to the return well by a pipeline. The monitoring and treatment mechanism also includes an influent water quality monitor for monitoring the water quality in the first screen tube and an effluent water quality monitor for monitoring the water quality in the return well.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, stirring devices are respectively installed on the mixing reaction tank and the regulating tank.

[0007] Furthermore, the treatment agents added to the mixing reaction tank from the dosing tank are sodium persulfate and ferrous sulfate.

[0008] Furthermore, the concentrations of sodium persulfate and ferrous sulfate in the mixing reaction tank are 450-550 mg / L, and the concentration of ferrous sulfate is 45-55 mg / L.

[0009] Furthermore, the exhaust outlet of the upflow anaerobic sludge reactor is connected to the exhaust gas treatment device via a pipeline.

[0010] Furthermore, the waste gas treatment device is an alkaline scrubbing tower or an alkaline scrubbing tank.

[0011] Furthermore, it also includes an aeration device, the aeration pipe of which extends into the groundwater in the return well.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention combines monitoring instruments with groundwater treatment devices, adopting dynamic control. It has the advantages of large processing capacity and high efficiency, ensuring timely detection and effective removal of excessive volatile organic compounds in groundwater at monitoring points. At the same time, it can also remove sulfate byproducts generated during the treatment of volatile organic compounds, reducing secondary pollution to the environment. Attached Figure Description

[0014] Figure 1 A schematic diagram of a control device for treating volatile organic compounds in groundwater provided by this utility model;

[0015] The attached diagram lists the components represented by each number as follows:

[0016] 1. First screen tube; 2. Second screen tube; 3. First water pump; 4. Mixing reaction tank; 5. Equalization tank; 6. Second water pump; 7. Upflow anaerobic sludge reactor; 8. Chemical dosing tank; 9. Influent water quality monitor; 10. Effluent water quality monitor; 11. Stirring device; 12. Waste gas treatment device; 13. Aeration device; 14. Aeration pipe. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0019] like Figure 1 As shown, this utility model provides a control device for treating volatile organic compounds in groundwater. It includes a first screen pipe 1 installed in a groundwater monitoring well, several second screen pipes 2 installed in a return well, and a monitoring and treatment mechanism installed on the ground surface for pumping, detecting, treating, and returning water from the monitoring well to the return well. The monitoring and treatment mechanism includes a first water pump 3, a mixing reaction tank 4, a regulating tank 5, a second water pump 6, and an upflow anaerobic sludge reactor 7, all connected sequentially by pipes. The first water pump 3 pumps groundwater from the first screen pipe 1 and sends it to the mixing reaction tank 4. A dosing tank 8 is located near the mixing reaction tank 4 for adding treatment agents. The outlet of the upflow anaerobic sludge reactor 7 is connected to the return well via a pipe. The monitoring and treatment mechanism also includes an inlet water quality monitor 9 for monitoring the water quality in the first screen pipe 1 and an outlet water quality monitor 10 for monitoring the water quality in the return well.

[0020] It should be noted that when the influent water quality monitoring instrument detects that the volatile organic compounds in the influent water exceed the standard, the first water pump is started, and the groundwater is pumped to the mixing reaction tank. The mixing reaction tank is equipped with an inlet, an outlet, and a stirrer (stirring device), and is connected to a dosing tank. The inlet and outlet of the equalization tank are connected to the outlet of the reaction tank and the inlet of the upflow anaerobic sludge reactor, respectively. After being regulated by the equalization tank, the water flows into the upflow anaerobic sludge reactor. The upflow anaerobic sludge reactor has an exhaust port at the top and is inoculated with sulfate-reducing bacteria to digest and treat the sulfates generated by the reaction with the chemicals and the residual organic matter in the treated water. The water treated by the upflow anaerobic sludge reactor is then reinjected into the groundwater layer. The equalization tank is mainly used to moderately adjust the pH, temperature and oxygen content of the effluent from the mixing reaction tank. For example, the pH is adjusted to neutral or slightly alkaline, the temperature is adjusted to about 20℃, and the oxygen content is adjusted to the normal oxygen content range under atmospheric pressure.

[0021] In an upflow anaerobic sludge reactor, wastewater is evenly distributed and enters the bottom of the reactor, flowing upwards through the anaerobic sludge bed. At the bottom of the reactor, there is a high-concentration (up to 100%)... A highly active sludge layer (150g / L) is formed, and a sludge suspension layer is formed on top of the sludge layer; a three-phase separator is installed at the top of the reactor to complete the separation of gas, liquid and solid phases; the separated digested gas is discharged from the top, the separated sludge automatically slides down to the sludge suspension layer, and the effluent flows out from the clarification zone.

[0022] In one embodiment of this invention, the treatment agent added from the dosing tank 8 to the mixing reaction tank 4 is sodium persulfate and ferrous sulfate. The concentrations of sodium persulfate and ferrous sulfate in the mixing reaction tank 4 are 450-550 mg / L, and the concentration of ferrous sulfate is 45-55 mg / L. The preferred concentration ratio of sodium persulfate to ferrous sulfate is 10:1.

[0023] In one embodiment of this utility model, the exhaust outlet (vent) of the upflow anaerobic sludge reactor 7 is connected to the exhaust gas treatment device 12 via a pipeline.

[0024] In one embodiment of this utility model, the waste gas treatment device 12 is an alkaline scrubbing tower or an alkaline scrubbing tank. The alkaline solution can be sodium hydroxide, potassium hydroxide, or sodium carbonate, etc., which reacts with hydrogen sulfide gas in the waste gas to generate corresponding sulfides or hydrosulfides.

[0025] In one embodiment of the present invention, an aeration device 13 is also included, wherein the aeration pipe 14 of the aeration device 13 extends into the groundwater in the return well.

[0026] It should be noted that continuous aeration into the well via an aeration device can effectively inhibit the activity of sulfate-reducing bacteria.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A control device for treating volatile organic compounds in groundwater, characterized in that, The system includes a first screen tube (1) installed in a groundwater monitoring well, several second screen tubes (2) installed in a return well, and a monitoring and treatment mechanism installed on the ground for pumping, testing, treating, and returning water from the monitoring well to the return well. The monitoring and treatment mechanism includes a first water pump (3), a mixing reaction tank (4), an equalization tank (5), a second water pump (6), and an upflow anaerobic sludge reactor (7) connected in sequence by pipelines. The first water pump (3) is used to pump groundwater from the first screen tube (1) and send it into the mixing reaction tank (4). A dosing tank (8) for adding treatment agents is provided near the mixing reaction tank (4). The outlet of the upflow anaerobic sludge reactor (7) is connected to the return well by pipelines. The monitoring and treatment mechanism also includes an influent water quality monitor (9) for monitoring the water quality in the first screen tube (1) and an effluent water quality monitor (10) for monitoring the water quality in the return well.

2. The control device for treating volatile organic compounds in groundwater according to claim 1, characterized in that, The mixing reaction tank (4) and the regulating tank (5) are respectively equipped with stirring devices (11).

3. The control device for treating volatile organic compounds in groundwater according to claim 1, characterized in that, The treatment agents added by the dosing tank (8) to the mixing reaction tank (4) are sodium persulfate and ferrous sulfate.

4. The control device for treating volatile organic compounds in groundwater according to claim 3, characterized in that, The concentrations of sodium persulfate and ferrous sulfate in the mixing reaction tank (4) are 450-550 mg / L and ferrous sulfate is 45-55 mg / L, respectively.

5. The control device for treating volatile organic compounds in groundwater according to claim 1, characterized in that, The exhaust outlet of the upflow anaerobic sludge reactor (7) is connected to the exhaust gas treatment device (12) via a pipeline.

6. The control device for treating volatile organic compounds in groundwater according to claim 5, characterized in that, The waste gas treatment device (12) is an alkaline scrubbing tower or an alkaline scrubbing tank.

7. A control device for treating volatile organic compounds in groundwater according to any one of claims 1 to 6, characterized in that, It also includes an aeration device (13), the aeration pipe (14) of which extends into the groundwater in the return well.

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