Permeable reaction well and permeable reaction well wall system
By designing a permeable reaction well composed of a multi-layer structure and using the equilateral triangle dot distribution method to form a reaction well wall system, the problems of high and low efficiency of microbial injection and reaction wells in the prior art are solved, and the microbial survival rate and degradation efficiency are improved, and the operating cost is reduced.
Patent Information
- Application Number
- CN202421838195.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing permeable microbial reaction walls have high costs and low microbial survival rates in microbial dosing and multiple reaction wells, which affect the degradation efficiency.
A permeable reaction well was designed, which consisted of the well wall, ceramic layer, polyethylene mesh lattice layer, quartz sand layer, polyethylene mesh lattice layer, foam silicon carbide filler layer and polyethylene mesh lattice layer. A reaction well wall system was formed by an equilateral triangle dot distribution method. Intermittent extraction and aeration were used to generate negative and positive pressure to cause reciprocating pressure disturbances on the water flow, improving the survival rate and degradation efficiency of microorganisms.
The uniform distribution of microbial nutrient solution is achieved, forming microbial hanging membranes, improving the survival rate and degradation efficiency of microbials, reducing the production cost of traditional reaction wall materials, and providing power through renewable energy, reducing operating and maintenance costs.
Smart Images
Figure CN222989956U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of groundwater pollution restoration, and specifically relates to the technical field of permeable microbial reaction well restoration. Technical Background
[0002] Permeable reactive wall (PRB) is a pollution treatment system that installs specific reactive media below the ground to achieve certain environmental pollution control goals. It blocks the pollution zone and converts the pollutants in it into an environmentally acceptable form without destroying the fluidity of groundwater. A permeable reactive wall is a passive reaction zone filled with active reactive media. When polluted groundwater passes through, the pollutants and media materials in it undergo physical, chemical and biological reactions and are degraded, adsorbed, precipitated or removed. Therefore, this technology has been widely used in groundwater remediation engineering practices at home and abroad, and has achieved good remediation results.
[0003] A permeable microbial reaction wall refers to a biologically active reaction wall formed by building a permeable reaction wall downstream of a pollution source, setting up an electron acceptor and nutrient supply system, activating indigenous microorganisms or inoculating dominant degradation bacteria of target pollutants in the reaction zone. When contaminated groundwater or organic polluted gas flows through the reaction wall, the pollutants will be degraded by the microorganisms in the reaction wall. Permeable microbial reaction walls mostly use natural materials such as plant debris, quartz sand, peat soil, activated carbon, soil, etc. as filling media, and the microorganisms are mostly added in a one-time addition of degradation bacteria or a one-time adsorption and fixation of dominant degradation bacteria. Therefore, it is urgent to develop a method of adding microorganisms through injection wells and connecting multiple microbial reaction wells in series to form a permeable reaction wall, which can not only reduce the production cost of traditional permeable reaction wall slot filling medium materials, but also improve the survival rate and degradation efficiency of microorganisms. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a permeable reaction well, which is characterized in that the permeable reaction well includes, from the outside to the inside, a well wall, a ceramsite layer, a polyethylene mesh grid layer, a quartz sand layer, a polyethylene mesh grid layer, a foamed silicon carbide filler layer and a polyethylene mesh grid layer.
[0005] Furthermore, the utility model also provides a permeable reaction well wall system, including a vacuum pump, an adsorption tower, an extraction port, a high-pressure air pump, an aeration head, a medicine storage tank, and a power system, characterized in that: the permeable reaction well wall system is formed by the permeable reaction well provided by the utility model using an equilateral triangle distribution method, and the medicine storage tank is connected to the foam silicon carbide filler layer of the permeable reaction well through a pipeline; the aeration head is located in the permeable reaction well, and the aeration head is connected to the high-pressure air pump; the permeable reaction well cover is provided with an extraction port, and the vacuum pump is connected to the adsorption tower through the extraction port to extract gas; the power system is connected to the vacuum pump and the high-pressure air pump.
[0006] Specifically, the power system is composed of monocrystalline silicon photovoltaic power generation components and lithium iron phosphate energy storage batteries.
[0007] Specifically, the drug adding pipeline of the drug storage tank has more than one branch pipeline.
[0008] The equilateral triangle point arrangement method referred to in the invention refers to: a layout method using three adjacent circles with equal distances, that is, the lines connecting the centers of three adjacent circles form an equilateral triangle. Figure 2 As shown in the figure, the blue dots represent reaction wells, and the dotted circles represent the influence range of the reaction wells.
[0009] Beneficial Effects
[0010] 1. The structure of the permeable reaction well provided by the utility model can realize the addition of microbial nutrient solution, so that the microbial nutrient solution is evenly distributed in the foamed silicon carbide filler layer to form a microbial biofilm.
[0011] 2. Combine the permeable reaction wall technology with renewable energy utilization technology, and use the intermittent extraction and aeration to generate negative and positive pressures to reciprocate the water flow in the treatment well. The dosing system uses microbial nutrient solution to evenly distribute in the porous medium foam silicon carbide filler of the permeable reaction well wall to form a microbial degradation well wall and improve the microbial treatment effect. The photovoltaic energy storage system provides clean and green power for power equipment such as vacuum pumps and high-pressure air pumps, and has low operation and maintenance costs.
[0012] 3. The microorganisms are injected and multiple microbial reaction wells are connected in series to form a permeable reaction wall. This can not only reduce the production cost of traditional permeable reaction wall slot filling medium materials, but also improve the survival rate and degradation efficiency of microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the construction location of the microbial well of the utility model;
[0014] Figure 2 This is a structural schematic diagram of a permeable reaction well wall system in a specific embodiment of the utility model;
[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of a permeable reaction well in a specific embodiment of the utility model;
[0016] Figure 4 This is a schematic diagram of the equilateral triangle point distribution method. DETAILED DESCRIPTION
[0017] To make the objectives, features, and advantages of the present utility model more apparent and understandable, the following provides a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings. Specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. Those skilled in the art can make similar improvements without departing from the concept of the present utility model. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.
[0018] As Figure 3 shown, in a specific embodiment of the present utility model, the permeable reactive well 9 sequentially includes a well wall 91, a ceramsite layer 92, a polyethylene mesh grid layer 93, a quartz sand layer 94, a polyethylene mesh grid layer 93, a foam silicon carbide filler layer 95, and a polyethylene mesh grid layer 93 from outside to inside.
[0019] As Figure 2 shown, in a specific embodiment of the present utility model, the permeable reactive well wall system of the permeable reactive well includes a power system composed of a vacuum pump 1, an adsorption tower 2, an extraction port 3, a high-pressure air pump 4, an aeration head 5, a chemical storage tank 6, a monocrystalline silicon photovoltaic power generation module 7, and a lithium iron phosphate energy storage battery 8; the permeable reactive well wall is formed by arranging the permeable reactive well 9 in a continuous hexahedron layout, and the chemical storage tank 6 leads to the foam silicon carbide filler layer 95 of the permeable reactive well 9 through a pipeline; the aeration head 5 is located inside the permeable reactive well 9, and the aeration head 5 is connected to the high-pressure air pump 4; an extraction port 3 is provided on the upper cover of the permeable reactive well 9, and the vacuum pump 1 is connected to the adsorption tower 2 to extract the gas inside the permeable reactive well 9 through the extraction port 3; the power system is connected to the vacuum pump 1 and the high-pressure air pump 4.
[0020] In a specific embodiment of the present utility model, as Figure 1 shown, in the downstream area of the polluted plot, the influence radius of the permeable microbial reaction well is determined according to the formation geology of the plot, and the triangular layout method (that is, an adjacent three-circle equidistant layout method, that is, the connection lines of three adjacent circle centers form an equilateral triangle, as Figure 4 shown) is used for layout to form a permeable microbial reaction area. The permeable reactive treatment well wall is arranged in the polluted plot. According to the soil properties, pollution degree, and equipment calculation, the influence radius of the permeable reactive well is determined, and the triangular layout method is used to form a reaction well wall. In this well, extraction aeration and chemical addition treatment processes are carried out for groundwater pollution remediation. The chemical storage tank 6 stores microbial nutrient solution, and the microbial nutrient solution is injected into the foam silicon carbide filler 95 through a chemical addition pipeline to form a permeable microbial reaction layer. The chemical addition pipeline includes a main pipe and six branch pipes. The main pipe is connected to the chemical storage tank 6, and several nozzles in the branch pipes are evenly distributed in the foam silicon carbide filler 95 of the permeable microbial reaction wall to form microbial film formation.
[0021] When the high-pressure air pump 4 and the aeration head 5 are used for aeration in the treatment well, the dissolved oxygen content in the polluted groundwater is increased, so that the polluted water is in an aerobic environment, with a pressure range of 1.0 - 5.0 Mpa and a gas supply volume range of 10 - 100 L / min. The gas extraction volume of the vacuum pump 1 for extraction ranges from 10 to 1000 L / min, and the vacuum degree ranges between 0 and 0.1 Mpa. The top of the permeable reaction well is provided with a sealing cover, and an extraction port 3 is arranged on the cover. The vacuum pump 1 and the adsorption tower 2 extract the gas in the well through the extraction port 3. When the extraction gas volume is greater than the aeration gas volume, the inside of the treatment well is in a negative pressure state. At this time, the water level in the treatment well rises, prompting the groundwater to be sucked into the well under negative pressure. When passing through the permeable reaction layer, the pollutants react with the permeable microorganisms for pollution interception and purification. By increasing the aeration gas volume through the high-pressure air pump 4 and the aeration head 5, the inside of the treatment well is in a positive pressure state. At this time, the water level in the treatment well drops, and the groundwater in the well is discharged under positive pressure. It passes through the permeable reaction layer again and undergoes the pollution interception and purification reaction again. Under sealed conditions, the treatment well undergoes intermittent extraction and aeration through the vacuum pump 1 and the high-pressure air pump 4. The generated negative and positive pressures cause reciprocating pressure disturbances to the water flow in the treatment well, improving the pollutant treatment efficiency, significantly shortening the purification treatment time, and effectively improving the purification treatment effect. The photovoltaic energy storage system consists of monocrystalline silicon photovoltaic power generation 7 and lithium iron phosphate energy storage batteries 8, providing clean and green power for power equipment such as vacuum pumps and high-pressure air pumps, with relatively low operation and maintenance costs.
Claims
1. A permeable reaction well, characterized in that: The permeable reaction well comprises, from outside to inside, a well wall, a ceramsite layer, a polyethylene mesh grid layer, a quartz sand layer, a polyethylene mesh grid layer, a foamed silicon carbide filler layer and a polyethylene mesh grid layer.
2. The permeable reaction well wall system includes a vacuum pump, an adsorption tower, an extraction port, a high-pressure air pump, an aeration head, a drug storage tank, and a power system, which is characterized by: The permeable reaction well wall system is formed by the permeable reaction well described in claim 1 using an equilateral triangle layout; the medicine storage tank is connected to the foam silicon carbide filler layer of the permeable reaction well through a pipeline; the aeration head is located in the permeable reaction well, and the aeration head is connected to a high-pressure air pump; the permeable reaction well upper cover is provided with an extraction port, and the vacuum pump is connected to the adsorption tower to extract gas through the extraction port; the power system is connected to the vacuum pump and the high-pressure air pump.
3. The permeable reaction well wall system according to claim 2, characterized in that: The power system is composed of a monocrystalline silicon photovoltaic power generation component and a lithium iron phosphate energy storage battery.
4. The permeable reaction well wall system according to any one of claims 2 or 3, characterized in that: The pipeline of the medicine storage tank has more than one branch pipeline.