CN215667608U - Underground water treatment device - Google Patents

Abstract

The utility model relates to the technical field of water treatment, in particular to an underground water treatment device which comprises a dosing unit, a pH adjusting unit, an oxidizing unit and a filtering unit, wherein the dosing unit, the pH adjusting unit and the filtering unit are all communicated with the oxidizing unit; the control unit can monitor the pH environment and the pollutant concentration in the oxidation unit and further uniformly regulate and control the pH environment, the medicament concentration and the medicament quantity, and is respectively and electrically connected with the oxidation unit controller, the medicament feeding unit controller and the pH adjusting unit controller; groundwater enters from the oxidation unit and is discharged after flowing through the filtration unit. The utility model aims to overcome the defects of the prior art and provide an underground water treatment device which can monitor the concentration of pollutants and the concentration of an added medicament on line so as to realize accurate administration of the medicament and intelligently and automatically control underground water treatment.

Description

Underground water treatment device

Technical Field

The utility model relates to the technical field of water treatment, in particular to an underground water treatment device.

Background

In fresh water resources in China, underground water resources occupy an extremely important position, the total amount of the water resources in China is close to 1/3, and in many areas, underground water is used as a main water source for urban water supply, but the condition of underground water pollution is quite common, shallow underground water in many cities cannot be directly drunk, the underground water is mainly subjected to artificial organic pollution, and micro-polluted organic matters of the underground water, such as phenols, nitrobenzenes, chlorobenzenes, nitrogen-containing compounds and the like, have the characteristics of high toxicity, wide pollution range, multiple types and high chemical oxygen demand, and can cause the deterioration of the quality of drinking water.

At present, the conventional treatment methods for organic pollutants in underground water mainly comprise biological oxidation and advanced oxidation. Advanced oxidation is an efficient oxidation technology based on active free radicals, and can oxidize and remove organic pollutants in water. The method mainly comprises the steps of oxidizing a reagent in underground water, generating free radicals with strong oxidizing property such as hydroxyl free radicals and sulfate free radicals through a series of physical and chemical processes, and oxidizing organic pollutants into non-toxic or low-toxicity micromolecular organic matters, carbon dioxide, water, inorganic salts and the like. However, the concentration of the chemical agent and the amount of the chemical agent are not easy to control, some oxidation reactions need to be carried out in a specific environment, such as an acidic environment, a neutral environment or an alkaline environment, groundwater pollutants contain many metal ions, such as Fe²⁺、Mn²⁺、Cu²⁺The oxidizing agent can be more preferably activated by these metal ions. The environment of the oxidation reaction cannot be monitored in the prior art.

Chinese patent CN209338250U discloses an underground water pollution treatment device, adopting a sediment sedimentation tank to firstly sediment water extracted from underground to remove sediment in the water, then carrying out redox reaction with a Fenton reagent through an oxidation reaction tank, reacting and removing impurities such as organic matters in the underground water, then introducing into an acid-base reaction tank to carry out acid-base neutralization, controlling a first electromagnetic valve and a second electromagnetic valve to ensure the amount of the added reagents in the oxidation reaction and the acid-base reaction, so as to ensure the completeness of the impurity reaction in the treated underground water and the acid-base neutralization, and secondly filtering and removing the impurities in the underground water again through two filtering devices, so that the treated underground water is clean and harmless, and the underground water pollution treatment device accords with the requirements of life, production and environmental protection, and can be eaten as direct drinking water. Although the device can control the amount of the added medicament from a certain degree, the pollutants in the groundwater cannot be monitored on line, so that the required amount of the medicament to be put in cannot be accurately obtained, the medicament is put in blindly, and the quality of the drinking water is not affected by excessive or insufficient medicament.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide an underground water treatment device which can monitor the concentration of pollutants and the concentration of an added medicament on line so as to realize accurate administration of the medicament and intelligently and automatically control underground water treatment.

In order to solve the technical problems, the utility model adopts the technical scheme that:

providing an underground water treatment device, which comprises a dosing unit, a pH adjusting unit, an oxidizing unit and a filtering unit, wherein the dosing unit, the pH adjusting unit and the filtering unit are all communicated with the oxidizing unit; the control unit can monitor the pH environment and the pollutant concentration in the oxidation unit and further uniformly regulate and control the pH environment, the medicament concentration and the medicament quantity, and is respectively and electrically connected with the oxidation unit controller, the medicament feeding unit controller and the pH adjusting unit controller; groundwater enters from the oxidation unit and is discharged after flowing through the filtration unit.

The dosing unit is used for temporarily storing the medicament reacting with the pollutants; the pH adjusting unit is used for adjusting the pH value in the oxidation unit so as to provide a better reaction environment and further improve the oxidation reaction effect; the oxidation unit provides a place for oxidation reaction to enable the underground water to carry out oxidation reaction; the filtering unit is used for filtering oxides generated after the medicament and pollutants are subjected to oxidation reaction and further filtering impurities in the underground water to further purify the underground water; the control unit can monitor the pH environment and the pollutant concentration in the oxidation unit so as to uniformly regulate and control the pH environment, the medicament concentration and the medicament quantity; the underground water enters the oxidation unit for oxidation reaction and then is discharged after being filtered by the filtering unit. The system can monitor the concentration of the pollutants in the underground water on line, so that the adding amount of the medicament in the dosing unit can be matched with the amount of the pollutants, the adding amount of the medicament just enables the pollutants to be fully reacted and is not excessive, on one hand, the medicament amount is saved, and on the other hand, the influence on the water quality can be reduced as little as possible.

Preferably, the control unit comprises a control system, a medicament concentration monitoring system, a pollutant concentration monitoring system and a pH feedback system, and the input end of the control system is respectively connected with the medicament concentration monitoring system, the pollutant concentration monitoring system and the pH feedback system; the output end of the control system is respectively connected with the oxidation unit controller, the dosing unit controller and the pH adjusting unit controller; a pollutant concentration collector and a pH collector are respectively arranged in the oxidation unit, the pollutant concentration monitoring system is electrically connected with the pollutant concentration collector, and the pH feedback system is electrically connected with the pH collector; a medicament concentration collector is arranged in the dosing unit, and the medicament concentration monitoring system is electrically connected with the medicament concentration collector.

Preferably, a first pipeline is arranged between the dosing unit and the oxidation unit, a first valve and a first flowmeter are arranged on the first pipeline, and the first valve and the first flowmeter are both electrically connected with the control system.

Preferably, a second pipeline is arranged between the pH adjusting unit and the oxidizing unit, a second valve and a second flowmeter are arranged on the second pipeline, and both the second valve and the second flowmeter are electrically connected with the control system.

Preferably, the filtering unit comprises a front filtering column and a rear filtering column which are sequentially arranged along the water outlet direction, a third pipeline is arranged between the oxidation unit and the front filtering column, a fourth pipeline is arranged between the front filtering column and the rear filtering column, and groundwater flows through the front filtering column and the rear filtering column and then flows out from the tail end of the rear filtering column.

Preferably, a plurality of first filter layers are arranged in the front filter column, and a plurality of second filter layers are arranged in the rear filter column.

Preferably, the material of the first filter layer is one of activated carbon, anthracite and quartz sand, and the material of the second filter layer is one of broken carbon, spherical activated carbon and coconut shell activated carbon.

Preferably, leading filtration post includes along the water direction can dismantle first connector, first waterproof sealing circle, first screw cap that connects in proper order, be equipped with the first filtration container, second screw cap, the waterproof sealing circle of second, the second connector of cavity, the third pipeline inserts in proper order first connector first waterproof sealing circle first screw cap extends to cross in the first filtration container, the fourth pipeline inserts in proper order the second connector the waterproof sealing circle of second the second screw cap extends to in the first filtration container.

Preferably, a first leakage-proof filter screen is arranged at the water inlet end part of the third pipeline close to the front filter column, and a second leakage-proof filter screen is arranged at the water outlet end part of the fourth pipeline close to the front filter column.

Preferably, a stirrer is further arranged in the oxidation unit, and the stirrer is movably connected with the oxidation unit.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the pH adjusting unit can adjust the pH value in the oxidation unit so as to provide a better reaction environment and further improve the oxidation reaction effect;

(2) the control unit can monitor the pH environment and the pollutant concentration in the oxidation unit and make the input amount of the medicament in the dosing unit match with the amount of the pollutant, so that the input amount of the medicament just makes the pollutant fully react and is unlikely to be excessive, on the one hand, the medicament amount is saved, and on the other hand, the influence on water quality can be caused as little as possible.

(3) The front-mounted filter column mainly utilizes material adsorption or physical interception to realize a filtering effect, and the rear-mounted filter column mainly utilizes the synergistic effect of adsorption of activated carbon and degradation of microorganisms and plays an auxiliary filtering effect at the same time.

Drawings

Fig. 1 is a schematic structural view of an underground water treatment apparatus according to the present invention.

The graphic symbols are illustrated as follows:

1. a dosing unit; 11. a first conduit; 12. a first valve; 13. a first flow meter; 2. a pH adjusting unit; 21. a second conduit; 22. a second valve; 23. a second flow meter; 3. an oxidation unit; 31. a third pipeline; 32. a stirrer; 4. a filtration unit; 41. a pre-filter column; 410. a first filter layer; 411. a first connector; 412. a first waterproof seal ring; 413. a first threaded cap; 414. a first filtration vessel; 415. a second threaded cap; 416. a second waterproof seal ring; 417. a second connector; 418. a first leak-proof screen; 419. a second leak-proof filter screen; 42. a post-filter column; 421. a second filter layer; 422. a third connector; 423. a third waterproof sealing ring; 424. a third screw cap; 425. a second filtration vessel; 426. a fourth screw cap; 427. a fourth waterproof seal ring; 428. a fourth connector; 43. a fourth conduit; 5. a control unit; 51. a control system; 52. a drug concentration monitoring system; 53. a contaminant concentration monitoring system; 54. a pH feedback system; 6. a water distribution hole; 71. a third valve; 72. a fourth valve; 73. and a fifth valve.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Examples

As shown in fig. 1, an embodiment of the underground water treatment device of the present invention includes a dosing unit 1, a pH adjusting unit 2, an oxidation unit 3, and a filtration unit 4, wherein the dosing unit 1, the pH adjusting unit 2, and the filtration unit 4 are all communicated with the oxidation unit 3; the device also comprises a control unit 5 which can monitor the pH environment and the pollutant concentration in the oxidation unit 3 and further uniformly regulate and control the pH environment, the medicament concentration and the medicament amount, wherein the control unit 5 is respectively and electrically connected with the oxidation unit 3 controller, the medicament adding unit 1 controller and the pH adjusting unit 2 controller; the groundwater enters from the oxidation unit 3 and is discharged after passing through the filtering unit 4.

As an embodiment of the present invention, the control unit 5 includes a control system 51, a drug concentration monitoring system 52, a contaminant concentration monitoring system 53, and a pH feedback system 54, wherein the input end of the control system 51 is connected to the drug concentration monitoring system 52, the contaminant concentration monitoring system 53, and the pH feedback system 54, respectively; the output end of the control system 51 is respectively connected with the oxidation unit 3 controller, the dosing unit 1 controller and the pH adjusting unit 2 controller; a pollutant concentration collector and a pH collector are respectively arranged in the oxidation unit 3, a pollutant concentration monitoring system 53 is electrically connected with the pollutant concentration collector, and a pH feedback system 54 is electrically connected with the pH collector; the medicine adding unit 1 is provided with a medicine concentration collector, and a medicine concentration monitoring system 52 is electrically connected with the medicine concentration collector.

The medicament concentration collector is used for collecting the medicament concentration in the dosing unit 1, and the medicament concentration monitoring system 52 is used for monitoring the medicament concentration in the dosing unit 1 on line so as to obtain the medicament concentration more suitable for oxidation reaction; the pollutant concentration collector is used for collecting the pollutant concentration in the oxidation unit 3, and the pollutant concentration monitoring system 53 is used for carrying out online monitoring on the pollutant concentration in the oxidation unit 3 so as to obtain the adaptive medicament quantity; the pH collector is used for collecting the pH in the oxidation unit 3, and the pH feedback system 54 is used for monitoring the pH environment in the oxidation unit 3 on line so as to adjust the pH value in real time and enable the oxidation reaction to be carried out in a more suitable environment; the control system 51 integrally regulates and controls the pH environment of the oxidation reaction, the medicament concentration of the dosing unit 1 and the medicament amount through the medicament concentration monitoring system 52, the pollutant concentration monitoring system 53 and the pH feedback system 54, so that intelligent and automatic regulation and control are realized.

In one embodiment of the present invention, a first pipe 11 is provided between the chemical adding unit 1 and the oxidation unit 3, a first valve 12 and a first flow meter 13 are provided on the first pipe 11, and both the first valve 12 and the first flow meter 13 are electrically connected to the control system 51.

The first pipeline 11 is used for communicating the dosing unit 1 and the oxidation unit 3, so that the medicine can smoothly enter the oxidation unit 3 from the dosing unit 1, the first valve 12 is used for controlling the amount of the medicine entering the oxidation unit 3, the first flowmeter 13 is used for monitoring the amount of the medicine flowing out of the dosing unit 1, data of the first flowmeter 13 is fed back to the control unit 5, and the control unit 5 controls the first valve 12 to be opened or closed so as to control the dosing amount. Preferably, the dosing unit 1 is disposed above the oxidation unit 3, so that dosing can be facilitated through the first pipe 11.

In one embodiment of the present invention, a second pipe 21 is provided between the pH adjusting unit 2 and the oxidizing unit 3, a second valve 22 and a second flow meter 23 are provided in the second pipe 21, and both the second valve 22 and the second flow meter 23 are electrically connected to the control system 51.

The second pipeline 21 is used for communicating the pH adjusting unit 2 with the oxidation unit 3, so that the pH adjusting unit 2 can adjust the pH environment in the oxidation unit 3, the second valve 22 is used for controlling the amount of the pH solution entering the oxidation unit 3, the second flow meter 23 is used for monitoring the amount of the pH solution flowing out of the pH adjusting unit 2, data of the second flow meter 23 is fed back to the control unit 5, and the control unit 5 controls the second valve 22 to be opened or closed, so as to control the amount of the pH solution.

In one embodiment of the present invention, the filtering unit 4 includes a pre-filtering column 41 and a post-filtering column 42 sequentially arranged along the effluent direction, the third pipe 31 is provided between the oxidation unit 3 and the pre-filtering column 41, the fourth pipe 43 is provided between the pre-filtering column 41 and the post-filtering column 42, and the groundwater flows through the pre-filtering column 41 and the post-filtering column 42 and then flows out from the end of the post-filtering column 42.

The front filter column 41 and the rear filter column 42 have a filtering function, the front filter column 41 is used for intercepting oxidized pollutants on one hand, and primarily filtering impurities in the underground water on the other hand, and is used for protecting the rear filter column 42 to prevent the oxidized pollutants from entering the rear filter column 42 on the other hand; the front filter column 41 mainly uses physical interception as a main part, and the rear filter column 42 plays a role in secondary filtration, and simultaneously plays a role in eliminating pollutants by promoting the growth of microorganisms in underground water and degrading by using microorganisms. The third pipeline 31 is used for communicating the oxidation unit 3 with the pre-filter column 41, so that the underground water subjected to oxidation reaction enters the pre-filter column 41 from the oxidation unit 3; the fourth pipe 43 is used to connect the pre-filter column 41 and the post-filter column 42, so that the groundwater filtered by the pre-filter column 41 enters the post-filter column 42 for secondary filtration. The water outlet is used for discharging the purified underground water after secondary filtration. Preferably, the pre-filter column 41 and the post-filter column 42 are each cylindrical.

In one embodiment of the present invention, the front filter column 41 is provided with a plurality of first filter layers 410, and the rear filter column 42 is provided with a plurality of second filter layers 421.

The first filtering layer 410 is used for primarily filtering the oxidized groundwater and intercepting the oxidized pollutants, and a plurality of first filtering layers 410 can be arranged to further improve the filtering and intercepting effects; the second filtering layer 421 is used for filtering the groundwater again, and the substance of the second filtering layer 421 is used to provide carbon source for the microorganism in the groundwater, so as to promote the growth and metabolism of the microorganism, and the microorganism and the residual pollutant are used to perform biochemical reaction, so as to achieve the purpose of further evolving the groundwater.

As an embodiment of the present invention, the material of the first filter layer 410 is one of activated carbon, anthracite and quartz sand, and preferably, the activated carbon is granular activated carbon. The material of the second filter layer 421 is one of broken carbon, spherical activated carbon, and coconut shell activated carbon.

Activated carbon, anthracite and quartz sand can play a good role in physical interception, but compared with activated carbon, anthracite and quartz sand are lower in cost, so that the first filter layer 410 is preferably made of anthracite or quartz sand; the crushed carbon, spherical activated carbon and coconut shell activated carbon have physical adsorption effect on one hand, and on the other hand, the characteristics of large specific surface area, developed pore structure and the like of the activated carbon are utilized to provide a carrier for the growth and propagation of microorganisms, the carrier is easy to adsorb small molecular organic matters such as acetic acid and the like, and the small molecular organic matters are used as carbon sources for the microorganisms. Within the scope of the knowledge of the skilled person, the filtering unit 4 may also be provided with a plurality of filtering columns, which are connected in series, or filtering layers of different materials are used in the existing filtering columns to achieve the filtering effect.

As an embodiment of the present invention, the pre-filter column 41 includes a first connector 411, a first waterproof sealing ring 412, a first screw cap 413, a first filter container 414 with a hollow cavity, a second screw cap 415, a second waterproof sealing ring 416, and a second connector 417, which are detachably connected in sequence along a water outlet direction, the third pipe 31 is inserted into the first connector 411, the first waterproof sealing ring 412, and the first screw cap 413 in sequence and extends into the first filter container 414, and the fourth pipe 43 is inserted into the second connector 417, the second waterproof sealing ring 416, and the second screw cap 415 in sequence and extends into the first filter container 414.

The first connector 411 is used for realizing good connection between the first filtering container 414 and the third pipeline 31, the first waterproof sealing ring 412 is used for playing a role in waterproof sealing, the first threaded cover 413 is used for covering the first filtering container 414 so as to seal the first filtering container 414, the second threaded cover 415 has the same role as the first threaded cover 413, the second waterproof sealing ring 416 has the same role as the first waterproof sealing ring 412, and the second connector 417 is used for realizing good connection between the first filtering container 414 and the fourth pipeline 43; a plurality of first filter layers 410 are arranged in the first filter container 414 between the first threaded cover 413 and the second threaded cover 415, and the first filter layers 410 are used for realizing the filtering function. The groundwater enters the first filtering container 414 through the third pipe 31, and flows out of the fourth pipe 43 after flowing through the first filtering container 414. Here, the first connector 411, the first waterproof sealing ring 412, the first threaded cover 413, and the first filtering container 414 are all detachably connected, and such an arrangement is to facilitate opening the first filtering container 414 regularly to perform sampling detection on the first filtering layer 410, facilitate knowing about changes of the filtering material, and facilitate timely supplementing new filtering material; the first connector 411, the first waterproof sealing ring 412 and the first threaded cover 413 may also be an integrated structure, so as to facilitate installation.

The post-filter column 42 has the same structure as the pre-filter column 41 as an embodiment of the present invention. The post-filter column 42 comprises a third connector 422, a third waterproof sealing ring 423, a third threaded cover 424, a second filter container 425 with a hollow cavity, a fourth threaded cover 426, a fourth waterproof sealing ring 427 and a fourth connector 428 which are sequentially detachably connected along the water outlet direction, and a fourth pipeline 43 is sequentially inserted into the third connector 422, the third waterproof sealing ring 423 and the third threaded cover 424 and extends into the second filter container 425.

In one embodiment of the present invention, a first leakage-proof screen 418 is provided at the water inlet end of the third pipe 31 near the pre-filter column 41, and a second leakage-proof screen 419 is provided at the water outlet end of the fourth pipe 43 near the pre-filter column 41.

Both the first and second leak- proof screens 418 and 419 are used to prevent the filter media in the first filter layer 410 from escaping with the water flow. Further, a plurality of water distribution holes 6 are formed at the end of the third pipe 31 near the first leakage-proof screen 418, so that the groundwater is uniformly distributed in the first filter layer 410. Preferably, the first and second leakage- proof sieves 418 and 419 are made of stainless steel, and the aperture is 0.3 mm-0.5 mm.

In one embodiment of the present invention, a stirrer 32 is further provided in the oxidation unit 3, and the stirrer 32 is movably connected to the oxidation unit 3.

The agitator 32 sufficiently mixes the chemical in the oxidation unit 3 with the groundwater by agitation to accelerate the oxidation reaction. The controller of the agitator 32 is electrically connected to the control system 51. The control system 51 may control the opening and closing of the agitator 32.

In one embodiment of the present invention, a third valve 71 is provided at the front end of the water inlet of the oxidation unit 3, a fourth valve 72 is provided between the oxidation unit 3 and the pre-filter column 41, and a fifth valve 73 is provided at the rear end of the water outlet of the post-filter column 42.

The third valve 71 is used for controlling water inflow, the fifth valve 73 is used for controlling water outflow, and the fourth valve 72 is used for closing during the oxidation reaction, so that the groundwater and the chemical can be fully oxidized.

In one embodiment of the present invention, the agent in the dosing unit 1 is PAA peroxyacetate, and the pH adjusting unit 2 is sodium hydroxide solution capable of neutralizing acidic environment.

And (3) underground water treatment process:

opening a third valve 71 and closing a fourth valve 72, enabling the groundwater to enter the oxidation unit 3, closing the third valve 71, opening a first valve 12, enabling the peracetic acid PAA in the dosing unit 1 to enter the oxidation unit 3, simultaneously opening a second valve 22, enabling the sodium hydroxide solution in the pH adjusting unit 2 to flow into the oxidation unit 3, and adjusting the pH to be about 7; the stirrer 32 is turned on and the peroxyacetic acid can be substituted by ferrous manganese (Fe) ions²⁺、Mn²⁺) Activation generates small molecular organic acetic acid and free radicals (such as hydroxyl free radical HO & C central free radical CH3C (O) O & lt- & gt, CH3C (O) & lt- & gt, CH3), and the free radicals can oxidize and remove most organic micropollutants and can remove Fe²⁺、Mn²⁺Oxidizing to generate iron-manganese suspended substance, and treating with PAA (poly (oxyacetic acid)) and ferrous-manganese ion (Fe)²⁺、Mn²⁺) After the reaction is completed, (reaction)The time is 10min to 40min), the stirrer 32 is closed, the fourth valve 72 and the fifth valve 73 are opened, the reacted underground water uniformly flows into the first filter layer 410 of the pre-filter column 41 through the third pipeline 31 and the water distribution hole 6, the iron and manganese suspended matters can be intercepted and removed by the first filter layer 410, the effluent water with the intercepted iron and manganese suspended matters flows into the second filter layer 421 in the post-filter column 42 through the fourth pipeline 43, the micromolecular organic carbon source acetic acid is used as a carbon source for the growth and utilization of microorganisms on the surface of the filter material, the formation of a biological filtration process is accelerated, the micro-polluted organic matters are further removed, and the treated underground water is discharged from the tail end of the post-filter column 42.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The underground water treatment device is characterized by comprising a dosing unit (1), a pH adjusting unit (2), an oxidizing unit (3) and a filtering unit (4), wherein the dosing unit (1), the pH adjusting unit (2) and the filtering unit (4) are communicated with the oxidizing unit (3); the device is characterized by also comprising a control unit (5) which can monitor the pH environment and the pollutant concentration in the oxidation unit (3) so as to uniformly regulate and control the pH environment, the medicine concentration and the medicine amount, wherein the control unit (5) is respectively and electrically connected with the oxidation unit (3) controller, the medicine adding unit (1) controller and the pH adjusting unit (2) controller; the underground water enters from the oxidation unit (3) and is discharged after flowing through the filtering unit (4).

2. A groundwater treatment apparatus according to claim 1, wherein the control unit (5) comprises a control system (51), a reagent concentration monitoring system (52), a pollutant concentration monitoring system (53), a pH feedback system (54), and the input end of the control system (51) is connected with the reagent concentration monitoring system (52), the pollutant concentration monitoring system (53), the pH feedback system (54) respectively; the output end of the control system (51) is respectively connected with the oxidation unit (3) controller, the dosing unit (1) controller and the pH adjusting unit (2) controller; a pollutant concentration collector and a pH collector are respectively arranged in the oxidation unit (3), the pollutant concentration monitoring system (53) is electrically connected with the pollutant concentration collector, and the pH feedback system (54) is electrically connected with the pH collector; a medicament concentration collector is arranged in the dosing unit (1), and a medicament concentration monitoring system (52) is electrically connected with the medicament concentration collector.

3. A groundwater treatment apparatus as claimed in claim 2, wherein a first pipe (11) is provided between the dosing unit (1) and the oxidation unit (3), a first valve (12) and a first flow meter (13) are provided on the first pipe (11), and both the first valve (12) and the first flow meter (13) are electrically connected to the control system (51).

4. A groundwater treatment apparatus as claimed in claim 2 or 3, characterised in that a second pipe (21) is provided between the pH adjusting unit (2) and the oxidation unit (3), a second valve (22) and a second flow meter (23) are provided on the second pipe (21), and the second valve (22) and the second flow meter (23) are both electrically connected to the control system (51).

5. A groundwater treatment apparatus as claimed in claim 4, wherein the filtering unit (4) comprises a pre-filtering column (41) and a post-filtering column (42) arranged in sequence along the effluent direction, a third pipe (31) is arranged between the oxidation unit (3) and the pre-filtering column (41), a fourth pipe (43) is arranged between the pre-filtering column (41) and the post-filtering column (42), and groundwater flows out from the end of the post-filtering column (42) after flowing through the pre-filtering column (41) and the post-filtering column (42).

6. A groundwater treatment apparatus as claimed in claim 5, wherein the pre-filter column (41) is provided with a number of first filter layers (410) and the post-filter column (42) is provided with a number of second filter layers (421).

7. A groundwater treatment apparatus as claimed in claim 6, wherein the material of the first filter layer (410) is one of activated carbon, anthracite and quartz sand, and the material of the second filter layer (421) is one of crushed carbon, spherical activated carbon and coconut shell activated carbon.

8. A groundwater treatment device as claimed in claim 7, wherein the pre-filter column (41) comprises a first connection head (411), a first waterproof sealing ring (412), a first threaded cover (413), a first filter container (414) with a hollow cavity, a second threaded cover (415), a second waterproof sealing ring (416), and a second connection head (417) which are detachably connected in sequence along the water outlet direction, the third pipe (31) is inserted into the first connection head (411), the first waterproof sealing ring (412), the first threaded cover (413) and extends into the first filter container (414), and the fourth pipe (43) is inserted into the second connection head (417), the second waterproof sealing ring (416), the second threaded cover (415) and extends into the first filter container (414) in sequence.

9. A groundwater treatment apparatus as claimed in claim 8, wherein a first leakage-proof screen (418) is provided at the water inlet end of the third pipe (31) near the pre-filter column (41), and a second leakage-proof screen (419) is provided at the water outlet end of the fourth pipe (43) near the pre-filter column (41).

10. A groundwater treatment apparatus as claimed in claim 1, characterised in that an agitator (32) is further provided in the oxidation unit (3), the agitator (32) being movably connected to the oxidation unit (3).

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