A remediation device and method for remediating groundwater benzene contamination

Abstract

The present application relates to a kind of repair device and method for repairing groundwater benzene pollution, repair device includes temporary storage component, exhaust pipe, reaction box and heater, reaction box is fixedly connected with temporary storage component, the inside of the temporary storage component is used to store groundwater to be repaired, the bottom end of the exhaust pipe is connected with the temporary storage component, the top end of the exhaust pipe extends to the inside of the reaction box, the inside of the reaction box is used to store reagent and gaseous benzene reaction, the heater is installed in the temporary storage component;Repair method includes: taking groundwater to be repaired in temporary storage component;The groundwater in temporary storage component is heated, and generated benzene gas;The generated benzene gas is introduced into reaction box and reacts with reagent, and the groundwater of temporary storage component is discharged;The content of benzene in groundwater is difficult to determine, it is difficult to control the amount of reagent, if reagent is added too much, then unreacted reagent is polluted soil after backflow with groundwater, if reagent is added less, the problem of poor repair effect.

Description

Technical Field

[0001] This invention relates to the field of groundwater remediation technology, and in particular to a remediation device and method for remediating benzene contamination in groundwater. Background Technology

[0002] Since benzene dissolves in groundwater, groundwater remediation devices can be used to remove benzene to prevent it from contaminating the soil as it migrates with the groundwater.

[0003] For example, the invention application with application number CN202211265853.9 proposes a remediation device and method for remediating benzene series pollution in groundwater. In this method, a lifting and fixing frame that can slide up and down within a collection and storage component is set up. The added agent is pushed upward by the buoyancy of the rising water level, thereby squeezing the extrusion folding cylinder and expelling the agent from the extrusion folding cylinder, which then falls into the water. This addition process does not require external power, reduces the number of electrical devices used, and has the advantages of energy saving and emission reduction.

[0004] Currently, the agent is directly added to the groundwater to be remediated, and then introduced back into the groundwater after benzene is removed. However, the benzene content in the groundwater is difficult to determine, making it difficult to control the amount of agent added. If too much agent is added, the unreacted agent will flow back with the groundwater and contaminate the soil. If too little agent is added, the remediation effect will be poor. Summary of the Invention

[0005] In view of this, it is necessary to provide a remediation device and method for remediating benzene pollution in groundwater, in order to solve the problems that the benzene content in groundwater is difficult to determine, the amount of reagent added is difficult to control, if too much reagent is added, the unreacted reagent will pollute the soil with the groundwater, and if too little reagent is added, the remediation effect will be poor.

[0006] This invention provides a remediation device for remediating benzene contamination in groundwater, comprising a temporary storage component, an exhaust pipe, a reaction chamber, and a heater. The interior of the temporary storage component is used to store the groundwater to be remediated. The bottom end of the exhaust pipe is connected to the temporary storage component, and the top end of the exhaust pipe extends into the interior of the reaction chamber. The reaction chamber is fixedly connected to the temporary storage component and contains a reagent for reacting with gaseous benzene. The heater is installed in the temporary storage component.

[0007] Furthermore, the temporary storage component includes a fixed box and a sliding box. The top of the fixed box is connected to the reaction box via the exhaust pipe. The fixed box is positioned above the sliding box. The fixed box and the sliding box have openings on opposite sides. The sliding box passes through the opening of the fixed box and forms a sealed cavity with the fixed box. Both the fixed box and the sliding box have through holes on their side walls. The sliding box is slidably connected to the fixed box and can slide to a first position and a second position. When the sliding box slides to the first position, the through hole on the fixed box communicates with the through hole on the sliding box, and the sealed cavity is connected to the outside through the through hole. When the sliding box slides to the second position, the through hole on the fixed box is offset from the through hole on the sliding box, and the sealed cavity is disconnected from the outside.

[0008] Furthermore, the temporary storage component also includes a plug, which is fixedly disposed on the inner bottom wall of the sliding box. When the sliding box slides to the first position, the plug abuts against the bottom end of the exhaust pipe to seal the exhaust pipe. When the sliding box slides to the second position, the plug is spaced apart from the bottom end of the exhaust pipe.

[0009] Furthermore, the temporary storage component also includes an annular sealing ring, and an annular groove is formed on the outer wall of the sliding box above the through hole. The annular sealing ring is embedded in the annular groove and slides against the inner wall of the fixed box.

[0010] Furthermore, the temporary storage component also includes a pusher, which is fixedly connected to the fixed box, and the output end of the pusher is connected to the sliding box to drive the sliding box to slide.

[0011] Furthermore, the heating temperature of the heater is greater than the boiling point of benzene and less than the boiling point of water.

[0012] Furthermore, it also includes a drug delivery component, which is connected to the reaction chamber for adding drugs into the reaction chamber.

[0013] Furthermore, it also includes a waste discharge component, the waste discharge end of which is connected to the reaction tank.

[0014] Furthermore, it also includes a lifting assembly, the lifting end of which is connected to the top of the reaction chamber.

[0015] The present invention also provides a remediation method for benzene contamination of groundwater, applicable to the remediation apparatus for benzene contamination of groundwater as described above, comprising the following steps:

[0016] S100. Take the groundwater to be repaired into the temporary storage component;

[0017] S200: Heat the groundwater in the temporary storage component to cause the benzene in the groundwater to volatilize and generate benzene gas;

[0018] S300: The generated benzene gas is introduced into the reaction chamber to react with the reagent, and the groundwater in the temporary storage component is extracted.

[0019] Compared with existing technologies, this device first places the groundwater to be remediated in a temporary storage component and heats the groundwater in the temporary storage component through a heater. Since benzene has a lower boiling point than water, by controlling the temperature inside the temporary storage component, only benzene evaporates into the reaction tank and reacts with the reagents in the reaction tank. The groundwater after benzene removal can be directly discharged. This device separates benzene from groundwater before processing, so there is no need to worry about the impact of the amount of reagent used, and the design is more reasonable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the remediation device for benzene contamination in groundwater provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the sliding box sliding to the first position in the remediation device for remediating benzene contamination in groundwater provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the sliding box sliding to the second position in the remediation device for remediating benzene contamination in groundwater provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram illustrating the principle of a remediation method for benzene contamination in groundwater, as provided in an embodiment of the present invention. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0025] like Figure 1 As shown, the present invention provides a remediation device for remediating benzene contamination in groundwater, comprising a temporary storage component 100, an exhaust pipe 111, a reaction chamber 200, and a heater 300. The interior of the temporary storage component 100 is used to store the groundwater to be remediated. The bottom end of the exhaust pipe 111 is connected to the temporary storage component 100, and the top end of the exhaust pipe 111 extends into the interior of the reaction chamber 200. The reaction chamber 200 is fixedly connected to the temporary storage component 100. The reaction chamber 200 is used to store the reagent that reacts with gaseous benzene. The heater 300 is installed in the temporary storage component 100.

[0026] During implementation, the groundwater to be repaired is first placed in a temporary storage component 100, and then heated by a heater 300. Since benzene has a lower boiling point than water, by controlling the temperature inside the temporary storage component 100, only benzene evaporates into the reaction tank 200 and reacts with the reagents in the reaction tank 200. The groundwater after benzene removal can be directly discharged. This device separates benzene from groundwater before processing, so there is no need to worry about the impact of the amount of reagent used, making the design more reasonable.

[0027] In this embodiment, the temporary storage component 100 is a structure for storing groundwater to be remediated. At the same time, the exhaust pipe 111 installed on it is used to introduce gaseous benzene into the reaction tank 200. Specifically, the interior of the temporary storage component 100 is used to store the groundwater to be remediated, the bottom end of the exhaust pipe 111 is connected to the temporary storage component 100, and the top end of the exhaust pipe 111 extends into the interior of the reaction tank 200.

[0028] like Figure 2-3 As shown, in one embodiment, the temporary storage component 100 includes a fixed box 110 and a sliding box 120. The top of the fixed box 110 is connected to the reaction box 200 via an exhaust pipe 111. The fixed box 110 is positioned above the sliding box 120. The fixed box 110 and the sliding box 120 have openings on opposite sides. The sliding box 120 passes through the opening of the fixed box 110 and forms a sealed cavity with the fixed box 110. Both the fixed box 110 and the sliding box 120 have openings on their side walls. Hole 140, sliding box 120 and fixed box 110 are slidably connected and can slide to a first position and a second position. When sliding box 120 slides to the first position, the through hole 140 on fixed box 110 and the through hole 140 on sliding box 120 are linked together, and the sealed cavity is connected to the outside through the through hole 140. When sliding box 120 slides to the second position, the through hole 140 on fixed box 110 and the through hole 140 on sliding box 120 are misaligned, and the sealed cavity is disconnected from the outside.

[0029] With the aforementioned fixed box 110 and sliding box 120, the temporary storage component 100 can be directly placed in groundwater or a well. When the sliding box 120 slides to the first position, the liquid or gas in the sealed cavity is replaced by the liquid in the groundwater, which facilitates the next repair work. When the sliding box 120 slides to the second position, the groundwater in the sealed cavity is locked inside, preventing the flow of external groundwater from affecting the heating process of the groundwater in the sealed cavity.

[0030] When the sliding box 120 slides to the first position, in order to prevent groundwater from flowing back into the reaction tank 200 under pressure difference, in one embodiment, the temporary storage component 100 further includes a plug 130. The plug 130 is fixedly disposed on the inner bottom wall of the sliding box 120. When the sliding box 120 slides to the first position, the plug 130 abuts against the bottom end of the exhaust pipe 111 to seal the exhaust pipe 111. When the sliding box 120 slides to the second position, the plug 130 and the bottom end of the exhaust pipe 111 are spaced apart.

[0031] In one embodiment, the temporary storage component 100 further includes an annular sealing ring 150. An annular groove is formed on the outer wall of the sliding box 120 above the through hole 140. The annular sealing ring 150 is embedded in the annular groove and slides against the inner wall of the fixed box 110.

[0032] To facilitate the sliding of the sliding box 120, in one embodiment, the temporary storage component 100 further includes a pusher 160, which is fixedly connected to the fixed box 110. The output end of the pusher 160 is connected to the sliding box 120 to drive the sliding box 120 to slide. It is understood that the pusher 160 can be implemented using a submersible motor or similar structure.

[0033] In one embodiment, when the sliding box 120 slides to the first position, the top of the sliding box 120 abuts against the inner top wall of the fixed box 110, and when the sliding box 120 slides to the second position, the bottom of the sliding box 120 abuts against the limiting block provided at the bottom of the fixed box 110, thereby ensuring that the sliding box 120 can stably switch between the first position and the second position.

[0034] In this embodiment, the reaction chamber 200 is used to store the reagent that reacts with gaseous benzene. The gaseous benzene in the reaction chamber 200 reacts and dissolves into the reagent.

[0035] In this embodiment, the heater 300 heats the groundwater in the temporary storage assembly 100, and the heater 300 is installed in the temporary storage assembly 100.

[0036] It should be noted that the heating temperature of heater 300 is greater than the boiling point of benzene but less than the boiling point of water.

[0037] To facilitate the replenishment of reagents in the reaction chamber 200, this embodiment also includes a reagent inlet assembly 400, which is connected to the reaction chamber 200 for adding reagents to the reaction chamber 200.

[0038] In one embodiment, the drug delivery assembly 400 includes a drug tank 410 and a drug delivery pipe 420. The drug tank 410 can be placed on the ground. The bottom of the drug tank 410 is connected to the reaction chamber 200 via the drug delivery pipe 420. A valve can be installed on the drug delivery pipe 420 to control the rate at which the drug is added.

[0039] To facilitate the removal of the products from the reaction of benzene and reagents in the reaction chamber 200, this embodiment also includes a waste discharge component 500, the waste discharge end of which is connected to the reaction chamber 200.

[0040] In one embodiment, the waste discharge assembly 500 includes a pump body 510, a waste inlet pipe 520, and a waste discharge pipe 530. The pump body 510 may be a submersible pump and is installed on the top of the reaction tank 200. One end of the submersible pump is connected to the bottom of the reaction tank 200 via a liquid inlet pipe, and the other end of the submersible pump discharges waste liquid via the waste discharge pipe 530.

[0041] To facilitate the placement of the temporary storage component 100 in groundwater or a well, this embodiment also includes a hoisting component 600, the hoisting end of which is connected to the top of the reaction tank 200.

[0042] It is understandable that the hoisting assembly 600 can be implemented using a winch or other structures, which are structures that those skilled in the art can conceive of, and will not be elaborated or explained further here.

[0043] like Figure 4 As shown, the present invention also provides a remediation method for groundwater benzene contamination, applicable to the remediation apparatus for groundwater benzene contamination as described above, comprising the following steps:

[0044] S100. Take the groundwater to be repaired into the temporary storage component;

[0045] S200: Heat the groundwater in the temporary storage component to cause the benzene in the groundwater to volatilize and generate benzene gas;

[0046] S300: The generated benzene gas is introduced into the reaction chamber to react with the reagent, and the groundwater in the temporary storage component is extracted.

[0047] Compared with existing technologies: The groundwater to be remediated is first placed in a temporary storage component, and then heated by a heater. Since benzene has a lower boiling point than water, by controlling the temperature inside the temporary storage component, only benzene evaporates into the reaction chamber and reacts with the reagents in the reaction chamber. The groundwater after benzene removal can be directly discharged. This device separates benzene from groundwater before processing, so there is no need to worry about the impact of reagent dosage. The design is more reasonable.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A remediation device for treating benzene contamination in groundwater, characterized in that, Includes temporary storage components, exhaust pipes, reaction chamber, and heater; The interior of the temporary storage component is used to store the groundwater to be remediated. The bottom end of the exhaust pipe is connected to the temporary storage component, and the top end of the exhaust pipe extends into the interior of the reaction chamber. The reaction chamber is fixedly connected to the temporary storage component, and the reaction chamber is used to store the reagent that reacts with gaseous benzene; The heater is installed in the temporary storage assembly; The temporary storage assembly includes a fixed box and a sliding box. The top of the fixed box is connected to the reaction box via the exhaust pipe. The fixed box is positioned above the sliding box. The fixed box and the sliding box have openings on opposite sides. The sliding box passes through the opening of the fixed box and forms a sealed cavity with the fixed box. Both the fixed box and the sliding box have through holes on their side walls. The sliding box is slidably connected to the fixed box and can slide to a first position and a second position. When the sliding box slides to the first position, the through hole on the fixed box is connected to the through hole on the sliding box, and the sealed cavity is connected to the outside through the through hole. When the sliding box slides to the second position, the through hole on the fixed box is offset from the through hole on the sliding box, and the sealed cavity is disconnected from the outside. The temporary storage component also includes a plug, which is fixedly disposed on the inner bottom wall of the sliding box. When the sliding box slides to the first position, the plug abuts against the bottom end of the exhaust pipe to seal the exhaust pipe. When the sliding box slides to the second position, the plug is spaced apart from the bottom end of the exhaust pipe.

2. The remediation apparatus for groundwater benzene contamination remediation according to claim 1, characterized in that, The temporary storage component also includes an annular sealing ring. An annular groove is formed on the outer wall of the sliding box above the through hole. The annular sealing ring is embedded in the annular groove and slides against the inner wall of the fixed box.

3. The remediation apparatus for remediating benzene contamination in groundwater according to claim 1, characterized in that, The temporary storage component also includes a pusher, which is fixedly connected to the fixed box. The output end of the pusher is connected to the sliding box to drive the sliding box to slide.

4. The remediation apparatus for groundwater benzene contamination remediation according to claim 1, characterized in that, The heating temperature of the heater is greater than the boiling point of benzene and less than the boiling point of water.

5. The remediation apparatus for remediating benzene contamination in groundwater according to claim 1, characterized in that, It also includes a drug delivery assembly connected to the reaction chamber for adding drugs into the reaction chamber.

6. The remediation apparatus for remediating benzene contamination in groundwater according to claim 1, characterized in that, It also includes a waste discharge component, the waste discharge end of which is connected to the reaction tank.

7. The remediation apparatus for remediating benzene contamination in groundwater according to claim 1, characterized in that, It also includes a lifting assembly, the lifting end of which is connected to the top of the reaction chamber.

8. A remediation method for benzene contamination of groundwater, characterized in that, The remediation apparatus for groundwater benzene contamination as described in any one of claims 1-7 comprises the following steps: The groundwater to be repaired is collected in a temporary storage component; The groundwater in the temporary storage component is heated so that the benzene in the groundwater volatilizes and generates benzene gas. The generated benzene gas is introduced into the reaction chamber to react with the reagents, and the groundwater in the temporary storage component is extracted.

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