Ozone enhanced stripping treatment device for repairing volatile polluted underground water

Abstract

The utility model discloses an ozone enhanced stripping treatment device for repairing volatile polluted groundwater, which comprises a stripping tower with a gas outlet at the top, a hollow ball filler in the middle and a waste water collecting box at the bottom; a gas-water separation plate is arranged at a wastewater overflow outlet in the wastewater collection tank, so that treated underground water flows into the wastewater overflow outlet from an opening formed in the bottom of the gas-water separation plate, and air and ozone conveyed by an air blower are prevented from being directly discharged from the wastewater overflow outlet; the water inlet pipeline is used for conveying underground water to the position above the hollow ball filler; the ozone generator is used for generating ozone; the air blower is used for transmitting air and ozone generated by the ozone generator into the air stripping tower through the air inlet; the air inlet is positioned below the hollow ball filler; after being treated by the hollow ball filler, underground water flows downwards and is collected by the wastewater collecting box; the gas is contacted with underground water from bottom to top to finish a mass transfer process and is discharged out of the stripping tower through a gas outlet.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an ozone-enhanced stripping treatment device for repairing volatile polluted groundwater. Background Art

[0002] Groundwater is one of Earth's most important freshwater resources. However, with the increase of human activities and the progress of industrialization, groundwater pollution is becoming increasingly serious. Groundwater pollution poses a serious threat to ecosystems and human health. Therefore, it is crucial to study the current status and challenges of groundwater pollution and remediation technologies.

[0003] Currently, the commonly used treatment technology for volatile organic polluted groundwater is not extracted. After extraction, the groundwater is treated by chemical oxidation and then discharged in compliance with the standards. Due to the large amount of groundwater pollution that is generally treated, the current commonly used treatment system has the disadvantages of many treatment units, large floor space, high energy consumption of equipment, and low treatment efficiency, making it difficult to remediate projects with high concentrations and large treatment volumes. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the utility model of the present invention provides an ozone-enhanced stripping treatment device for repairing volatile contaminated groundwater.

[0005] The technical solution of the utility model includes an ozone-enhanced stripping treatment device for repairing volatile contaminated groundwater, the device comprising:

[0006] A stripping tower, wherein the top of the stripping tower is provided with an air outlet, the middle is provided with a hollow ball filler, and the bottom is provided with a wastewater collection box; wherein, the wastewater collection box is provided with an air-water isolation plate at the wastewater overflow outlet, so that the treated groundwater flows into the wastewater overflow outlet from the opening provided at the bottom of the air-water isolation plate, while preventing the air and ozone transmitted by the blower from being directly discharged from the wastewater overflow outlet;

[0007] A water inlet pipe is used to transport the groundwater to be treated to the top of the hollow ball filler;

[0008] an ozone generator for generating ozone;

[0009] A blower is used to transmit air and ozone generated by the ozone generator to the interior of the stripping tower through an air inlet, wherein the air inlet is located below the hollow ball filler;

[0010] After being treated by the hollow ball filler, the groundwater flows downward and is collected by the wastewater collection box; the gas contacts the groundwater from bottom to top to complete the mass transfer process and is discharged out of the stripping tower through the gas outlet.

[0011] Furthermore, activated carbon and a dryer are provided below the air outlet.

[0012] Furthermore, a sand filter tank is provided on the water inlet pipe, and the sand filter tank is used to perform sand filtration on the groundwater and filter out suspended matter;

[0013] Furthermore, a plurality of atomizing nozzles are provided on the surface of the end portion of the water inlet pipe extending into the stripping tower, that is, the water inlet pipe.

[0014] Furthermore, a Z-shaped partition is provided in the hollow ball filler, so that the groundwater flows in a Z-shaped flow in the hollow ball filler section due to gravity, thereby increasing the flow of the groundwater and increasing the treatment residence time.

[0015] Furthermore, a check valve is provided between the blower and the ozone generator.

[0016] The beneficial effects of the utility model are:

[0017] This utility model provides an ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater. The groundwater to be remediated is fed into a stripping tower for stripping and enhanced ozone oxidation treatment. After being treated with hollow sphere packing, the groundwater flows downward and is collected in a wastewater collection tank. Gas, from bottom to top, contacts the groundwater, completing the mass transfer process, and is discharged from the stripping tower through an outlet. Compared to traditional equipment, this device occupies less space, consumes less energy, and has higher treatment efficiency, completely resolving the challenges of remediating volatile contaminated groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of an ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater provided by an embodiment of the present invention.

[0020] In the figure, 1-stripping tower, 2-sand filter tank, 3-water inlet pipe, 4-blower, 5-check valve, 6-ozone generator, 7-water flow direction, 8-air outlet, 9-activated carbon, 10-dryer, 11-atomizing nozzle, 12-partition, 13-hollow ball filler, 14-air-water isolation plate, 15-wastewater overflow outlet, 16-wastewater collection box. DETAILED DESCRIPTION

[0021] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0022] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. As used in this utility model and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms first, second, third, etc. may be used in this utility model to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, first information can also be referred to as second information without departing from the scope of this utility model, and similarly, second information can also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when...", "when...", or "in response to determining."

[0024] The present invention will be described in detail below with reference to the accompanying drawings. Unless there is any conflict, the features of the following embodiments and implementations may be combined with each other.

[0025] like Figure 1 As shown, the utility model of the present invention provides an ozone-enhanced stripping treatment device for repairing volatile contaminated groundwater, the device comprising:

[0026] The stripping tower 1 is provided with an air outlet 8 at the top, a hollow ball filler 13 in the middle, and a wastewater collecting box 16 at the bottom; wherein, an air-water isolation plate 14 is provided at the wastewater overflow outlet 15 in the wastewater collecting box 16, so that the treated groundwater flows into the wastewater overflow outlet 15 from the opening provided at the bottom of the air-water isolation plate 14, while preventing the air and ozone transmitted by the blower 4 from being directly discharged from the wastewater overflow outlet 15.

[0027] Furthermore, activated carbon 9 and a dryer 10 are provided below the air outlet 8 .

[0028] Furthermore, a Z-shaped partition 12 is provided in the hollow ball filler 13, so that the groundwater flows in a Z-shaped flow through the hollow ball filler 13 by gravity, thereby increasing the flow of the groundwater and the treatment residence time.

[0029] The water inlet pipe 3 is used to transport the groundwater to be treated to the top of the hollow ball filler 13.

[0030] Furthermore, a sand filter tank 2 is provided on the water inlet pipe 3, and the sand filter tank 2 is used to perform sand filtration on the groundwater and filter out suspended matter.

[0031] Furthermore, a plurality of atomizing nozzles 11 are provided on the surface of the end portion of the water inlet pipe 3 extending into the interior of the stripping tower 1. Through atomization, the contact area between air and wastewater is increased, thereby improving the efficiency of stripping and oxidation treatment;

[0032] The ozone generator 6 is used to generate ozone.

[0033] The blower 4 is used to transmit air and ozone generated by the ozone generator 6 to the interior of the stripping tower 1 through an air inlet, and the air inlet is located below the hollow ball filler 13.

[0034] Furthermore, a check valve 5 is provided between the blower 4 and the ozone generator 6 .

[0035] After being treated by the hollow ball filler 13 , the groundwater flows downward and is collected by the wastewater collection box 16 ; the gas contacts the groundwater from bottom to top to complete the mass transfer process and is discharged from the stripping tower 1 through the gas outlet 8 .

[0036] Next, the working process of the ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater provided by the present invention is described:

[0037] First, determine the scope of groundwater pollution, build extraction wells in the contaminated area, and extract groundwater;

[0038] The groundwater to be treated enters the sand filter tank 2 for filtration to remove suspended matter and other impurities; after sand filtration, the wastewater enters the top of the stripping tower 1 through the water inlet pipe 3;

[0039] After entering the stripping tower 1, the groundwater is atomized by the atomizing nozzle 11; the atomized groundwater enters the hollow ball packing 13 by gravity, and the hollow ball packing 13 is segmented by the Z-shaped partition 12. The wastewater flows in the segmented hollow ball packing system in a Z-shaped manner;

[0040] The blower 4 and the ozone generator 6 bring air and ozone into the bottom of the stripping tower 1. After entering, the air and ozone are stripped and ozonized in the hollow ball filler 13 to treat the atomized wastewater.

[0041] The treated groundwater enters the wastewater collection box 16, which is provided with an air-water isolation plate 14 and a wastewater overflow outlet 15. The treated groundwater flows out through the wastewater overflow outlet 15; the waste gas after stripping and oxidation treatment is dried by the dryer 10 at the top of the stripping tower; the waste gas after drying is adsorbed by activated carbon 9, and is discharged through the outlet 8 after the treatment meets the standards.

[0042] The above embodiments are intended only to illustrate the design concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of protection of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications based on the principles and design concepts disclosed in the present invention are within the scope of protection of the present invention.

Claims

1. An ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater, characterized in that: The device comprises: A stripping tower (1), wherein the top of the stripping tower (1) is provided with an air outlet (8), the middle is provided with a hollow ball filler (13), and the bottom is provided with a wastewater collection box (16); wherein an air-water separation plate (14) is provided at the wastewater overflow outlet (15) in the wastewater collection box (16), so that the treated groundwater flows into the wastewater overflow outlet (15) from the opening provided at the bottom of the air-water separation plate (14), while preventing the air and ozone transmitted by the blower (4) from being directly discharged from the wastewater overflow outlet (15); A water inlet pipe (3) for transporting groundwater to be treated to the top of the hollow ball filler (13); an ozone generator (6) for generating ozone; A blower (4) is used to transmit air and ozone generated by the ozone generator (6) to the interior of the stripping tower (1) through an air inlet, wherein the air inlet is located below the hollow ball filler (13); After being treated by the hollow ball filler (13), the groundwater flows downward and is collected by the wastewater collection box (16); the gas contacts the groundwater from bottom to top to complete the mass transfer process and is discharged from the stripping tower (1) through the gas outlet (8).

2. The ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater according to claim 1, characterized in that: Activated carbon (9) and a dryer (10) are provided below the gas outlet (8).

3. The ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater according to claim 1, characterized in that: A sand filter tank (2) is provided on the water inlet pipe (3), and the sand filter tank (2) is used to perform sand filtration on groundwater and filter out suspended matter.

4. The ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater according to claim 1, characterized in that: A plurality of atomizing nozzles (11) are provided on the surface of a water inlet pipe (3) extending into the interior of the stripping tower (1), that is, the end portion of the water inlet pipe (3).

5. The ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater according to claim 1, characterized in that: A Z-shaped partition (12) is provided in the hollow ball filler (13), so that groundwater flows in a Z-shaped flow through the hollow ball filler (13) section under the action of gravity, thereby increasing the flow of groundwater and the treatment residence time.

6. The ozone-enhanced stripping treatment device for remediating volatile contaminated groundwater according to claim 1, characterized in that: A check valve (5) is provided between the blower (4) and the ozone generator (6).

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