CN218963604U - Soil and groundwater integrated restoration system - Google Patents

Abstract

The utility model discloses an integrated soil and groundwater remediation system, which comprises: the device comprises a pumping well and a water injection well, wherein a pumping pipe is arranged in the pumping well, the water injection well is provided with a water injection pipe, the device further comprises a transfer pool and at least two purification towers which are arranged on the ground and work in parallel, the pumping pipe is communicated with the transfer pool, the transfer pool guides groundwater to the purification towers through pumps, each pump is provided with a program control valve, the program control valves control a plurality of pumps in working states, the purification towers are connected with the water injection pipe through a water outlet pipeline, and the water outlet pipeline is also connected with a chemical reaction tank through another pump. The utility model solves the problems of low efficiency and poor restoration effect of the original soil restoration system.

Description

Soil and groundwater integrated restoration system

Technical Field

The utility model belongs to the field of environmental protection technologies, and particularly relates to a soil and groundwater integrated restoration system.

Background

In recent years, the industry of China rapidly develops, and the areas of organic polluted soil are continuously increased by the production of industries such as metal ore mining, petroleum exploitation, chemical industry, coking and the like. With the rapid development of industry, the exploitation of underground soil is increasingly increased, and the soil pollution and the underground water pollution are increasingly serious, if the underground soil is not treated, the property of the soil is seriously affected, and the damage to the environment is not neglected.

At present, an ectopic technology is mostly adopted for the soil restoration of the type of sites, namely, polluted soil and groundwater are excavated and extracted and then restored or treated. The technology generally needs more engineering machinery and combined water treatment equipment in the repairing process, the method has the advantages of higher investment cost, lower repairing efficiency, more serious secondary pollution such as factory noise and atmosphere unorganized emission in the construction process, and higher requirements on construction environment and safety management. Site restoration by adopting an in-situ technology, and avoiding large-scale excavation transfer and the use of large complete equipment are development directions in the technical field of soil restoration at present.

Disclosure of Invention

The utility model aims to provide a soil and groundwater integrated restoration system, which aims to solve the problems of low efficiency and poor restoration effect of the original soil restoration system.

The technical scheme adopted by the utility model is as follows:

a soil and groundwater integrated remediation system, comprising: the device comprises a pumping well and a water injection well, wherein a pumping pipe is arranged in the pumping well, a water injection pipe is arranged in the water injection well, and the device is characterized by further comprising a transfer pool positioned on the ground and at least two purification towers working in parallel, wherein the pumping pipe is communicated with the transfer pool, the transfer pool guides groundwater to the purification towers through pumps, each pump is provided with a program control valve, the program control valves control a plurality of working states of the pumps, the purification towers are connected with the water injection pipe through a water outlet pipeline, and the water outlet pipeline is also connected with a chemical reaction tank through another pump.

Further, the system also comprises a monitoring well which is opened into the underground water, wherein a pH detection meter and an air injection pipe are arranged in the monitoring well, one end of the air injection pipe extends into the underground water, and the other end of the air injection pipe is connected with an aerator positioned on the ground.

Further, the water injection wells are arranged in a plurality of mode and are arranged around the polluted soil area in a surrounding mode, and the pumping wells penetrate through the polluted soil area to underground water until reaching the impervious layer.

Further, a particle layer for culturing the microorganism base is laid over the surface layer of the contaminated soil area, covering at least the whole contaminated soil area.

Further, the purifying towers are two that the parallel connection set up, and every purifying tower passes through respective pump connection transit pond, be provided with from last interval down in the purifying tower: a water distributor at the top, a filler layer in the middle and stone particles at the bottom.

Further, the packing layer is a skeleton structure which is composed of regular packing and/or random packing and provided with a plurality of mutually staggered channels.

Further, the top of the water injection pipe is also provided with a communicated booster pump.

Compared with the prior art, the soil and groundwater integrated restoration system provided by the utility model has the following technical effects:

1. according to the method, the polluted groundwater is extracted, then enters the purification tower through the water storage transfer tank to purify the groundwater, then a chemical agent or a microbial agent is added into the purified water through the agent reaction tank, and then the water added with the agent is sent into the underground well through the booster pump, so that the repairing effect is good;

2. the number of the purification towers is two, the plurality of purification towers are controlled to work alternately and continuously through the program control valves connected with the pumps, and the repair efficiency is improved;

3. according to the method, the monitoring well is arranged, the pH value change in the underground water is detected in real time, different choices of chemical agents are facilitated, in addition, the aeration device is arranged in the monitoring well, oxygen is conveniently dissolved into the underground water, sludge and the like in the underground water are uniformly mixed, and the sludge is conveniently extracted;

4. the adsorption tower adopts the packing layer, and the inside of the packing layer is provided with the structural framework of a plurality of holes which are arranged in geometric figures and are communicated with each other, so that the travelling speed of water flow is delayed, and some harmful impurities in water are adsorbed by the packing to the greatest extent;

5. according to the method, the isolation layer is arranged above the polluted soil area, and the isolation layer can be used for synchronously repairing the polluted soil on the surface layer by planting or culturing a plurality of microorganisms.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an integrated soil and groundwater remediation system according to an embodiment of the utility model.

Fig. 2 is a schematic layout view of a water injection well according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram of an integrated soil and groundwater remediation system in accordance with an embodiment of the present utility model.

Fig. 4 is a schematic structural view of an adsorption tower according to an embodiment of the present utility model.

Detailed Description

The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model. Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a manufacturer of hardware or software may refer to a component by different names. The description and claims do not take the form of an element with differences in names, but rather with differences in functions. The description hereinafter sets forth a preferred embodiment for practicing the utility model, but is not intended to limit the scope of the utility model, as the description is given for the purpose of illustrating the general principles of the utility model. The scope of the utility model is defined by the appended claims.

The utility model will now be described in further detail with reference to the drawings and to specific examples.

Referring to fig. 1 to 3, an embodiment of the present utility model discloses an integrated soil and groundwater remediation system, including: one or two pumping wells 11 and a plurality of water injection wells 12, wherein, a plurality of water injection wells 12 are arranged around the polluted soil area, a plurality of water permeable holes facing the polluted soil direction are arranged on the inner wall of the water injection well 12, the water permeable holes gradually permeate into the polluted soil area from the periphery, the height of the water injection well 12 is basically consistent with the depth of the polluted soil and does not reach the ground water, and the pumping wells 11 pass through the polluted soil area to the ground water until reaching the impervious layer. Wherein a water suction pipe is arranged in the water suction well 11, a water injection pipe is arranged in the water injection well 12, a plurality of water injection pipes share the same water outlet pipeline, a control valve can be arranged on each water injection pipe, a water suction pump is arranged on each water injection pipe, underground water is pumped out of the water suction well 11 to the upper part of soil through the water suction pump, a transfer tank 13 which is positioned on the ground and is used for storing water and a purifying tower 14 which is used for repairing, wherein the program control valve 16 controls a plurality of the water suction pumps to work alternately, each water suction pipe is communicated with a reservoir, underground water is pumped out and transferred to the transfer tank 13, the transfer tank 13 is subjected to primary sedimentation firstly, some impurities with larger granularity are settled and removed, the transfer tank 13 leads the pumped underground water to the purifying tower 14 through pumps, the purifying tower 14 of the application is provided with two, each purifying tower 14 is connected with the transfer tank 13 through one pump, so that the underground water to be repaired in the transfer tank 13 is conveniently pumped into the purifying tower 14, because the purification tower 14 takes a certain time for purification, two pumps are arranged to work in parallel, so that purified groundwater continuously enters a plurality of water injection wells 12 again, alternately and continuously works, the work efficiency of reinjection is improved, each pump is connected with a programmable valve 16, the working state of each pump is controlled by the programmable valve 16, for example, the programmable valve A controls the pump a to pump water from the transit tank 13 once every 8 minutes, the programmable valve B controls the pump B to pump water from the transit tank 13 once every 10 minutes, the purification tower 14 is connected with the water injection pipe through a water outlet pipeline, and the water outlet pipeline is connected with a chemical reaction tank 15 through a pump, wherein chemical agents or microbial agents which improve the groundwater soil are added in advance in the chemical reaction tank 15, and the purified groundwater enters the water injection wells 12 again, the polluted soil is gradually permeated to the inner side of the periphery through the water injection well 12, so that the polluted soil is slowly restored first. In order to facilitate water source transportation of the reinjection well, the top of the water injection pipe is further provided with a communicated pressurizing pump so as to pressurize when the pressure is insufficient.

In this embodiment, a monitoring well 17 is further provided, wherein the monitoring well 17 is placed under piles from the periphery of the contaminated soil area and is opened to the groundwater, a pH meter is provided in the monitoring well 17 to detect the pH value of the groundwater, the groundwater condition under the contaminated soil can be properly known according to the pH value, so as to properly regulate the type and concentration of the chemical in the chemical reaction tank 15, the chemical reaction tank can be disposed near the periphery of the contaminated soil, an air injection pipe is further inserted into the monitoring well 17, one end of the air injection pipe extends into the groundwater, the other end of the air injection pipe is connected with an aerator 19 located on the ground, the aerator 19 is provided to facilitate efficient oxygen dissolution into the groundwater, generate a plurality of tiny bubbles, and simultaneously the oxygen is rapidly transferred in the groundwater to achieve a good stirring effect, so that the sludge, heavy metal ions and the like in the groundwater can be uniformly mixed, and the pumping well 11 can conveniently pump the contaminated water.

Referring to fig. 4, in the present embodiment, the purifying tower 14 has a cylindrical structure, and is provided with: the water distributor 141 at the top, the packing layer 142 in the middle and the stone particle layer 143 at the bottom, which is composed of a plurality of elliptic spherical sand stones, wherein the height of the packing layer 142 is approximately 1/2-2/3 of the height of the purifying tower 14, the stone particles occupy approximately 1/6-1/4 of the height of the purifying tower 14, the groundwater to be repaired pumped from the transfer tank 13 is firstly uniformly opened into a dispersed surface by the water distributor 141 at the top and uniformly falls into the packing layer 142, the packing layer 142 is a skeleton-type structure composed of regular packing and/or random packing and provided with a plurality of mutually staggered channels, whether the packing layer 142 is structured packing or random packing, the packing layer is made of regular or irregular geometric shapes which are formed by fusing activated carbon, coke, yellow coal, diatomite, bauxite, slag, silica gel, adsorption resin and the like, the contact area and the contact time of the water to be treated inside the packing are increased as much as possible by utilizing the special internal structure of the packing, the effect is improved, some heavy metal ions are adsorbed by the packing layer 142, the metal particles and the like enter the bottom of the metal particles of the packing layer 143, the metal particles can be filtered out of the water from the bottom of the purifying tower 14 after the metal particles are filtered again, and the water particles are filtered from the bottom of the tower 14.

In order to prevent rain from scouring the surface layer of the polluted soil to other areas, a particle layer 18 for culturing microorganism base is laid above the surface layer of the polluted soil area, at least covering all the polluted soil area, the particle layer 18 is mainly used for symptomatically culturing some microorganisms or culturing some green plants, and the polluted soil area can be covered and isolated, and the soil is gradually purified by the microorganisms cultured by themselves entering the soil.

It should be noted that the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the scope of the utility model, and the present utility model may also be modified by material and structure of the above-mentioned various components or by substitution of technical equivalents. Therefore, all equivalent structural changes made in the specification and the illustrated content of the present utility model, or direct or indirect application to other related technical fields are included in the scope of the present utility model.

Claims (7)

1. A soil and groundwater integrated remediation system, comprising: the device comprises a pumping well and a water injection well, wherein a pumping pipe is arranged in the pumping well, a water injection pipe is arranged in the water injection well, and the device is characterized by further comprising a transfer pool positioned on the ground and at least two purification towers working in parallel, wherein the pumping pipe is communicated with the transfer pool, the transfer pool guides groundwater to the purification towers through pumps, each pump is provided with a program control valve, the program control valves control a plurality of working states of the pumps, the purification towers are connected with the water injection pipe through a water outlet pipeline, and the water outlet pipeline is also connected with a chemical reaction tank through another pump.

2. The integrated soil and groundwater remediation system of claim 1 further comprising a monitoring well open to the groundwater, a pH meter and an air injection pipe are disposed in the monitoring well, one end of the air injection pipe extends into the groundwater, and the other end of the air injection pipe is connected to an aerator located on the ground.

3. A soil and groundwater integrated remediation system as claimed in claim 1 or claim 2 wherein said injection wells are a plurality and spaced around the periphery of the contaminated soil area and said pumping wells extend from the contaminated soil area through to the groundwater to the impervious layer.

4. The integrated soil and groundwater remediation system of claim 3 wherein the purification tower is provided with, from top to bottom: a water distributor at the top, a filler layer in the middle and stone particles at the bottom.

5. A soil and groundwater integrated remediation system as claimed in claim 2 wherein a layer of particles for culturing the microbiological substrate is also laid over the surface of the contaminated soil area covering at least the entire contaminated soil area.

6. The integrated soil and groundwater remediation system of claim 4 wherein the filler layer is a skeletal structure of structured and/or random fillers having a plurality of mutually staggered channels.

7. The integrated soil and groundwater remediation system of claim 2 wherein the top of the water injection pipe is further provided with a communicating booster pump.

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