CN203866897U - Filling-pumping double-function well for treating groundwater pollution - Google Patents

Abstract

The utility model relates to a filling-pumping double-function well for treating groundwater pollution. The filling-pumping double-function well for treating groundwater pollution is characterized in that a reaction material well body (17) is formed in a non-point source pollution area, a well wall pipe (3) is arranged on the inner wall of the reaction material well body (17), a pumping well body (18) is formed in the well wall pipe (3), the reaction material well body (17) and the pumping well body (18) are filled to form the filling-pumping double-function well, a filtering pipe (6) is arranged at the position of a water-bearing layer of the well wall pipe (3), an impervious water pipe (12) is arranged on the upper portion of the well wall pipe (3), the periphery, where the filtering pipe (6) is arranged, of the well wall pipe (3) is provided with a composite medium material layer (2), the space, between the periphery of the impervious water pipe (12) and the ground (9), of the upper surface of the composite medium material layer (2) is filled with clay balls (7) through an interlay (5), the bottom of the well wall pipe (3) is embedded into base rock (8), and a pumping pipe (1) is arranged in the well wall pipe (3). The filling-pumping double-function well for treating groundwater pollution solves the problems that non-point source pollution is difficult to treat, and groundwater cannot be drunk.

Description

A kind of process groundwater pollution fill in-draw water double well

Technical field

The utility model belongs to groundwater treatment equipment technical field, be adapted to that large area underground water contaminated area, particularly important supply water sources suffer that groundwater pollution recovers a kind of process groundwater pollution fill in-draw water double well.

Background technology

Non-point pollution comprises agricultural nonpoint source pollution and urban non-point source pollution, and along with the development of economic society and intensive agriculture, groundwater environment problem is developed to pollution of area source by point-source pollution gradually, by city, to rural area, is expanded.Especially in agricultural planting process, use in a large number the nitrogen-containing pollutants of chemical fertilizer, fertilizer, industrial discharge, penetrate into for a long time in underground water, nitrate in groundwater content raises, make the content overproof of some regional nitrate nitrogen in ground waters of northern China, cause a large amount of water head site water quality to be polluted, safe drinking water and ecological environment are constituted a threat to, had a strong impact on the people's water supply security and healthy.The processing method of groundwater pollution and technique mainly contain dystopy processing method and original position repairing method, and wherein dystopy facture is the technology of processing by surface water treatment process, mainly comprise and pollute soil body excavation method and extract processing method; Original position repairing method is to save extraction under the condition of human intervention, and the technology of Polluted Groundwater being repaired in original place, mainly comprises: original position douche: repair materials is injected to underground pollution place, and at downstream extraction underground water, the method for repeatedly rinsing; In situ chemical oxidation method: oxidant is injected to underground water, with pollutant reaction; Permeable reactive barrier method (PRB): by excavation groove, filling reaction medium, makes groundwater pollutant be stopped and react, thereby reaches the object of degradation of contaminant.In above-mentioned these methods, apply at the scene at present comparatively effectively permeable reactive barrier (PRB) method, PRB method is the method for underground water and soil pollution components of removing for original position.PRB is generally arranged on underground reservoir, perpendicular to groundwater flow direction, the reaction material using is generally the zero-valent metal (the modal Fe0 of being) with stronger reducing power, and other also has activated carbon, ion exchange resin, phosphate and some natural materialss as chitin, zeolite, limestone, organic clay etc.The structure of PRB has continuous body of wall and channel form, all has different applicable elements, and its design and construction are subject to the especially impact of stratum and underflow of hydrogeological conditions.PRB also has certain limitation: be only adapted to directed groundwater pollutant diffusion, especially pinniform Pollutants Diffusion in soil horizon or phreatic water; Project organization form is simple, is generally groove structure or the channel form of diaphragm wall formula; The fitting depth of PRB is generally 10m left and right; The filling mode of PRB medium is for directly inserting in groove; Be generally 5～7 years the application life of the dielectric material of PRB, and dielectric material is difficult to recycle.Therefore darker when the aquifer degree of depth, while especially solving the pollution problem of phreatic surface source, the application of permeable reactive barrier technology is just restricted.2012, Water Resources Research Institute of Shangdong Province has carried out the original position reinstatement works test of groundwater azotate pollution, has obtained the patent of invention of " a kind of original position repair system construction technology of carrying out on medium coarse sand stratum " and the utility model patent of " a kind of PRB cover well ".Wherein patent of invention is the construction technology of repairing based on original position, lay particular emphasis on technical field of construction, how to build diaphragm wall, antiseepage stake, PRB(permeable reactive barrier) material, unifunctionally carrying out water quality monitoring, is mainly around PRB reaction wall, the distribution form of well and an invention of construction technology.PRB cover well utility model patent is only an a kind of cover well technology, is that a small diameter pipeline is installed in PRB well, is mainly used in water quality monitoring.

Summary of the invention

The purpose of this utility model is mainly to repair problem in order to solve the original position of pollution of area source district underground water, particularly importantly underground water seedbed and the darker Water quality restoration of the aquifer degree of depth, thus reach water treatment and supply water two targets and provide a kind of process groundwater pollution fill in-draw water double well.

Principle of the present utility model is to utilize double well method manually to build water level funnel to carry out pollutant and come to process, Ji pollution of area source district offers and fills in well, the inner peripheral of filling in well well head builds reaction material well, the middle pumped well that builds, the water-head of well and pumped well is filled in utilization, underground water penetrates in pumped well after filling in well filtration, reaction, carries out the Transformatin of groundwater pollutant.Cylindrical space between pumped well and stratum is the space of filling in of reaction medium combined material, the runoff of underground water and the space of pollutant removal; Utilize double well construction process to merge fill in well and pumped well with the design in a boring, thereby realize water treatment and the dual purpose of the direct-furnish water factory of drawing water.Specific embodiment is as follows:

Double well is filled in-drawn water to a kind of processing groundwater pollution, it is characterized in that: in pollution of area source district, reaction material well is set, on the inwall of reaction material well, wall casing is set, in wall casing, it is pumped well, fill in reaction material well and pumped well and form " fill in-draw water " double well, the position, aquifer of wall casing is provided with filter pipe, the top of wall casing is waterproof pipe, the outer Wall that wall casing is provided with filter pipe is provided with combination of media material layer, above combination of media material layer, through interlayer, at the outer Wall of waterproof pipe, fill in clay ball, the bottom of wall casing is embedded in basement rock, drinking-water pipe is set in wall casing, the hole diameter of described pumped well is between 110cm～160cm, the internal diameter of described drinking-water pipe is between 10～20cm, between the wall casing of waterproof pipe and ground, fill in clay ball, prevent that sewage from entering in well along wall casing, the general 0.5m～0.8m of clay ball thickness, clay ball bottom arranges interlayer.

The utility model has solved pollution of area source and has been difficult to the problem of administering, underground water cannot be drunk, and the structure of its double well single well of only need to constructing just can reach the dual purpose of pollutant removal and water supply.Under pumping with constant rate state, can guarantee that the water body entering in well all passes through combining medium material, water quality is through coagulation, reach the object of degraded, removal pollutant, form underground water in-situ treatment system, by pumped well, draw water to reach the object of water supply, this double well can be widely used in processing and the water supply of the pollutant in pollution of area source district underground water.

Accompanying drawing explanation

Fig. 1 is theory structure schematic diagram of the present utility model;

Fig. 2 is sectional structure schematic diagram of the present utility model.

In figure, 1, drinking-water pipe, 2, combination of media material layer, 3, wall casing, 4, stratum, 5, interlayer, 6, filter pipe, 7, clay ball, 8, basement rock, 9, ground, 10, groundwater level, 11, reducing agent injection device, 12, waterproof pipe, 13, expanded capsule, 14, intrusion pipe, 15, forcing pipe, 16, communicating pipe, 17, reaction material well, 18, pumped well, 19, fluid hole.

The specific embodiment

With reference to accompanying drawing, the utility model is to be adapted to pollution of area source district groundwater pollutant remove a kind of processing groundwater pollution of taking into account water supply and fill in-draw water double well, and concrete embodiment is as follows:

Double well is filled in-drawn water to a kind of processing groundwater pollution, it is characterized in that: in pollution of area source district, reaction material well 17 is set, wall casing 3 is set on the inwall of reaction material well 17, in wall casing 3, it is pumped well 18, fill in reaction material well 17 and form " fill in-draw water " double well with pumped well 18, the position, aquifer of wall casing 3 is provided with filter pipe 6, the top of wall casing 3 is waterproof pipe 12, the outer Wall that wall casing 3 is provided with filter pipe 6 is provided with combination of media material layer 2, combination of media material layer 2 above through interlayer 5, between the outer Wall of waterproof pipe 12 and ground 9, fill in clay ball 7, prevent that sewage from entering in well along wall casing 3, the bottom of wall casing 3 is embedded in basement rock 8, the interior drinking-water pipe 1 that arranges of wall casing 3, the hole diameter of described pumped well 18 is between 110cm～160cm, the internal diameter of described drinking-water pipe 1 is between 10～20cm, general 0.5m～the 0.8m of thickness of clay ball 7.

Use of the present utility model and processing method are as follows:

One, at the cylindrical space of combination of media material layer 2, fill in and remove combination of media material, according to the effect of the pollution concentration of underground water and combination of media material, determine the thickness of combined material, thickness general control is at 50～70cm, for preventing from causing in filler process the water conservancy sorting of combination of media material, inserting of combination of media material adopts physics to spray slip casting method or mechanical injection method, and combination of media material is filled in and entered position, aquifer.

Two, reducing agent regularly injects: the physical life of nitrate removal material is generally in 7～10 years, in order to guarantee recycling of material, need to inject reducing agent at the two ends of combination of media material layer 2, reducing agent injection device 11 is arranged in the regional well that need to carry out groundwater azotate processing, this reducing agent injection device 11 is provided with inflatable capsule 13 and the reducing agent intrusion pipe 14 of two series connection, reducing agent intrusion pipe 14 is provided with fluid hole 19, inflatable capsule 13 is connected with forcing pipe 15 and communicating pipe 16, to the interior water filling of inflatable capsule 13, under the pressure-acting of force (forcing) pump, upper and lower two inflatable capsules 13 expand, shutoff intrusion pipe 14 and wall casing 3between gap, pipeline section between two expanded capsules 13 forms reducing agent slurries outflow tube section, reducing agent slurries are flowed out by fluid hole 19, outflow tube section can be placed on positions different in well, with the processing well reaction material for diverse location, apply reducing agent, the injection of this reducing agent, can make to remove the utilization of material repetitive cycling, solve removal materials'use age limit problem, and can effectively solve the blockage problem of nitrate removal material,

Three, draw water and water quality monitoring: after regularly injecting reducing agent, the reducing agent injection device 11 of filling in-drawing water in double well well can be withdrawn from, and water quality monitoring instrument is installed, real-time dynamic monitoring quality of groundwater, can draw water by drinking-water pipe 1, after the underground water of existing pollution in well is discharged, through the underground water removed after filtration of material, be clean underground water, the water quality of underground water reaches in drinking water after Water Quality For Groundwater Sources standard, can constant flow directly for water supply plant or user.

Claims (2)

1. double well is filled in-drawn water to a processing groundwater pollution, it is characterized in that: reaction material well (17) is set in pollution of area source district, wall casing (3) is set on the inwall of reaction material well (17), in wall casing (3), be pumped well (18), filling in reaction material well (17) forms and fills in-draw water double well with pumped well (18), the position, aquifer of wall casing (3) is provided with filter pipe (6), the top of wall casing (3) is waterproof pipe (12), the outer Wall that wall casing (3) is provided with filtration (6) is provided with combination of media material layer (2), combination of media material layer (2) above through interlayer (5), between the outer Wall of waterproof pipe (12) and ground (9), fill in clay ball (7), prevent that sewage from entering in well along wall casing (3), the bottom of wall casing (3) is embedded in basement rock (8), drinking-water pipe (1) is set in wall casing (3).

2. according to processing groundwater pollution claimed in claim 1, fill in-draw water double well, it is characterized in that: the hole diameter of described pumped well (18) is between 110cm～160cm, and the internal diameter of described drinking-water pipe (1) is between 10～20cm; General 0.5m～the 0.8m of thickness of clay ball (7).