In-situ double-machine independent linkage remediation system for soil and underground water pollution of in-production enterprise

Abstract

The utility model relates to the technical field of environmental engineering soil and groundwater pollution remediation, in particular to an in-situ double-machine independent linkage remediation system for in-production enterprise soil and groundwater pollution, which comprises an in-situ injection-multiphase extraction system, an auxiliary system and a remediation system, the in-situ injection-multiphase extraction system is respectively communicated with the auxiliary system and the repair system through specific pipelines; the in-situ injection-multiphase extraction system comprises a first system and a second system which are independently arranged in parallel, and through the first system and the second system which are arranged in parallel, in-situ injection oxidation and in-situ multiphase extraction are continuously and synchronously carried out in a buried pollutant deposition state; independent operation of double mechanisms of in-situ injection oxidation and multiphase extraction can be met, the treatment process is flexible and convenient, and a specific treatment process can be adopted for specific pollutants.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of soil and groundwater pollution environmental engineering repair technology, especially to a kind of in-situ double-machine independent linkage repair system of in-production enterprise soil and groundwater pollution. BACKGROUND

[0002] In-situ soil remediation technology refers to the soil remediation technology that directly repairs contaminated soil in-situ without excavation. Commonly used in-situ remediation technologies in China include in-situ leaching, gas phase extraction, multi-phase extraction, gas phase injection, biodegradation, in-situ chemical oxidation, in-situ chemical reduction, etc. In-situ injection repair involves injecting remediation agents into contaminated soil or groundwater areas to convert pollutants in the soil or groundwater into non-toxic or relatively less toxic substances, thereby achieving the purpose of repair. Multi-phase extraction technology involves extracting soil gas, groundwater and oil slicks from contaminated underground areas to the ground for phase separation and treatment to control and remediate organic pollutants in soil and groundwater, thereby achieving the purpose of site remediation.

[0003] In the prior art, due to the complexity of in-production enterprise soil and groundwater pollution, single use of in-situ injection chemical remediation or multi-phase extraction physical remediation has low remediation efficiency, long remediation period and incomplete remediation. There are also in-situ injection and multi-phase extraction combined remediation methods, which are only two independent remediation systems simply stacked for use, cannot realize the combination of multiple remediation methods in one system, and have low equipment utilization and poor overall remediation effect. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiencies of the prior art and provides an in-situ double-machine independent linkage repair system for in-production enterprise soil and groundwater pollution, which can continuously perform in-situ injection oxidation and in-situ multi-phase extraction simultaneously under the condition of buried pollutant deposition, can also independently operate in-situ injection oxidation and multi-phase extraction, has flexible and convenient processing technology, and can use specific processing technology for specific pollutants.

[0005] The utility model solves the technical problems by adopting the following technical scheme: an in-situ double-machine independent linkage repair system for in-production enterprise soil and groundwater pollution, which comprises an in-situ injection-multi-phase extraction system, an auxiliary system and a repair system; the in-situ injection-multi-phase extraction system is in communication with the auxiliary system and the repair system through pipelines; the auxiliary system comprises a reagent preparation system, an air compressor, a diaphragm pump, connecting pipelines and valves; the in-situ injection-multi-phase extraction system comprises a first system and a second system in independent communication, the first system comprises a plurality of first in-situ wells, injection extraction valves and connecting pipelines, and the second system comprises second in-situ wells, injection extraction valves and connecting pipelines.

[0006] Preferably, the repair system comprises a buffer system, a gas-liquid separation system, a waste gas treatment system, a waste water treatment system and a sludge treatment system.

[0007] Preferably, the first in-situ well and the second in-situ well are staggered, so that the contact rate of the lifting agent and the pollutants is improved, and the repair dead angle is effectively avoided, and the overall repair effect is improved.

[0008] Preferably, the first in-situ well and the second in-situ well are provided with injection-extraction pipes, injection-extraction valves, pressure gauges and reducing tees. The discharge end of the agent preparation system is provided with a rotor flowmeter and a discharging valve, the extraction valve and the feeding valve are arranged in parallel between the diaphragm pump and the in-situ injection-extraction system, and the diaphragm pump is provided with a blowdown valve and the repair system.

[0009] Preferably, the first system and the second system are connected in parallel and communicated with the air compressor, the air supply pipeline of the air compressor is provided with an air supply valve, and a check valve is arranged at the end of the air supply valve, so that the medium of the first system and the second system is prevented from flowing back into the air compressor.

[0010] Preferably, when the discharging valve, the feeding valve and the air supply valve are opened, the extraction valve and the blowdown valve are closed, so that the in-situ injection repair operation mechanism can be operated independently.

[0011] Preferably, when the extraction valve and the blowdown valve are opened, the air supply valve, the discharging valve and the feeding valve are closed, so that the multi-phase extraction repair operation mechanism can be operated independently.

[0012] Preferably, the hole diameter of the first in-situ well and the second in-situ well is less than 50 mm, the diameter of the injection-extraction pipe is less than 32 mm, and the materials of all pipes and equipment need to be corrosion-resistant and high-pressure-resistant. For conventional heavy metal and organic pollution sites, PVC material can be considered. For ground buried flammable material (such as elemental phosphorus) and other pollutant site repair operations, the in-situ injection-multi-phase extraction well also needs to consider high-temperature-resistant materials.

[0013] Compared with the prior art, the beneficial effects of the in-situ double-machine independent linkage remediation system for soil and groundwater pollution of a production enterprise are that: 1, the in-situ injection-extraction system, an auxiliary system and a remediation system; the in-situ injection-extraction system is communicated with the auxiliary system and the remediation system through pipelines; the in-situ injection-extraction system comprises a first system and a second system which are independently connected in parallel, and the in-situ injection-oxidation and in-situ multi-phase extraction are simultaneously performed under the condition of the buried pollution deposition state by the parallel connection of the first system and the second system, and the in-situ injection-oxidation and multi-phase extraction double-machine independent operation can also be achieved, and the treatment process is flexible and convenient, and specific treatment processes can be used for specific pollutants.

[0014] 2, the in-situ well is provided with an injection-extraction pipe and a reducing tee, the in-situ well is connected with an air compressor and a diaphragm pump in parallel, the in-situ well can be used as an extraction well or an injection well, the equipment has high versatility and high utilization efficiency.

[0015] 3, the first in-situ well and the second in-situ well of the utility model are staggered, the contact rate of the lifting agent and the pollutants is improved, the dead angle of remediation is effectively avoided, and the overall remediation effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a kind of in-situ double-machine independent linkage remediation system structure schematic view for soil and groundwater pollution of a production enterprise of the utility model.

[0017] MARKING OF THE DRAWINGS:

[0018] 1, in-situ injection-extraction system, 11, first system, 12, second system, 13, first in-situ well, 14, second in-situ well, 15, injection-extraction pipe;

[0019] 2, auxiliary system, 21, agent deployment system, 22, rotor flow meter, 23, air compressor, 24, diaphragm pump;3, remediation system, 31, buffer system, 32, gas-liquid separation system, 33, wastewater treatment system, 34, waste gas treatment system, 35, sludge treatment system.

[0020] MARKING OF VALVES IN DRAWINGS:

[0021] Z1, Z2, Z3, Z4 are injection-extraction valves;Z5, Z6 are extraction valves;Z7, Z8 are blanking valves;Z9, Z10, Z15, Z16, Z17 are blow-off valves;Z11, Z12 are feed valves;Z13, Z14 are air supply valves;H1, H2, H3, H4 are check valves. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail below in combination with the drawings and specific embodiments, and is not intended to limit the utility model's implementation range to this.

[0023] As Figure 1 The utility model discloses a in-situ injection -extraction system 1, auxiliary system 2 and repair system 3 are included in a kind of in-situ double-machine independent linkage repair system of enterprise soil and groundwater pollution of the utility model, and the in-situ injection -extraction system 1 is used to inject chemical substance or the device of soil gas, groundwater and floating oil layer to the soil and groundwater pollution environment;The in-situ injection -extraction system 1 is communicated with auxiliary system 2 and the repair system 3 respectively by pipeline;The in-situ injection -extraction system 1 includes the parallelly connected arrangement of No. 1 system 11 and No. 2 system 12, No. 1 system 11 is connected with a plurality of No. 1 in-situ well 13, No. 2 system 12 is connected with a plurality of No. 2 in-situ well 14, No. 1 in-situ well 13 and No. 2 in-situ well 14 are provided with injection extraction pipe 15, injection extraction valve, pressure gauge and reducing tee. Auxiliary system 2 includes medicament deployment system 21, air compressor 23, diaphragm pump 24, connecting pipeline and a plurality of valves;The discharge end of medicament deployment system 21 is provided with rotor flowmeter 22 and discharging valve 22, and extraction valve and feed valve are arranged between diaphragm pump 24 and in-situ injection -extraction system 1, and diaphragm pump 24 is provided with blowdown valve with repair system;Repair system 3 includes buffer system 31, gas-liquid separation system 32, waste gas treatment system 34, waste water treatment system 33 and sludge treatment system 35;No. 1 in-situ well 13 and No. 2 in-situ well 14 are staggered arrangement.

[0024] Further, No. 1 system 11 and No. 2 system 12 are communicated with air compressor 23 after parallel connection, and the air supply pipeline of air compressor 23 is provided with air supply valve, and the front end of air supply valve is provided with check valve.

[0025] Further, the aperture of No. 1 in-situ well and No. 2 in-situ well is less than 50mm, the diameter of injection extraction pipe is less than 32mm, and the material of all pipelines and equipment needs to use corrosion-resistant and high-pressure-resistant material, and PE or PVC material can be considered for conventional heavy metal and organic pollution site (emphasis on considering the corrosion resistance, yield strength and compression resistance of the material, etc.), and for the site repair operation of buried flammable substance (such as elemental phosphorus) and other pollutants, the in-situ injection -multiphase extraction well also needs to consider high-temperature-resistant material.

[0026] Example 1

[0027] In-situ injection independent repair operation mechanism:

[0028] When the pollutants are only single flammable, heavy metals or other easily oxidized and reduced pollutants, the in-situ injection independent repair mechanism is used. Under the operation condition of the independent repair mechanism, the injection extraction valves Z1, Z2, Z3 and Z4 are opened, the discharge valves Z7 and Z8 are opened, the supply valves Z11 and Z12 are opened, and the gas supply valves Z13 and Z14 are opened; the extraction valves Z5 and Z6 and the discharge valves Z9 and Z10 are in a fully closed state, and the corresponding control valves and controllers of the harmless treatment system 3 at the end of the pollutants are all closed, and the operation is stopped. When working, the reagent preparation system 21, the diaphragm pump 24 and the air compressor 24 are started in turn, the discharge valves Z7 and Z8 and the air compressor 23 frequency controller are adjusted, the rotor flow meter 22 and the pressure gauge are observed, and the best stable working state is adjusted, so that the in-situ injection repair system can be independently operated.

[0029] Example 2

[0030] In-situ multi-phase extraction independent repair operation mechanism:

[0031] When the pollutants are only single VOC and other pollutants, the in-situ multi-phase extraction independent repair operation mechanism is used. Under the operation condition of the independent repair mechanism, the discharge valves Z7 and Z8, the supply valves Z11 and Z12, and the gas supply valves Z13 and Z14 are all in a fully closed state, the reagent preparation system 21 and the air compressor 23 and their corresponding control valves and controllers are all closed, and the operation is stopped. The injection extraction valves Z1, Z2, Z3 and Z4 are opened, and the extraction valves Z5 and Z6, the discharge valves Z9 and Z10 and Z16 are in an open state. When working, the waste gas treatment system 34, the buffer system 31, the diaphragm pump 24, the gas-liquid separation system 32 and the wastewater treatment system 33 are started in turn. When the sludge in the buffer system 31 and the wastewater treatment system 33 approaches the pre-warning line, the control valves Z15 and Z17 are opened for sludge cleaning, and the cleaned sludge enters the sludge treatment system 35 for drying and harmless treatment. Until the stable water and gas are discharged, the in-situ multi-phase extraction repair system can be independently operated.

[0032] Example 3:

[0033] In-situ injection oxidation-multiple phase extraction double machine linkage repair operation mechanism:

[0034] When the soil and groundwater are polluted, the environment is complex and the time is urgent, the linkage operation mechanism is used. Under the operation condition of the linkage repair mechanism, the in-situ injection repair operation is carried out by the first system 11, and the in-situ multi-phase extraction repair operation is carried out by the second system 12. The system starts as follows:

[0035] 1. Close the extraction valve Z5 and the discharge valve Z9 of the first system 11, open the discharge valve Z8, the gas supply valve Z13, the supply valve Z12 of the first system 11, and open the injection extraction valves Z1 and Z3;

[0036] 2. Close the feeding valve Z7, the discharging valve Z11 and the gas supply valve Z14 of the second system 12, open the extraction valve Z6 and the waste valve Z10 of the second system 12, and open the injection extraction valves Z2 and Z4;

[0037] 3. Start the medicine preparation system 21, the air compressor 23, the waste gas treatment system 34, the buffer system 31, the diaphragm pump 24, the gas-liquid separation system 32, the waste water treatment system 33; when the sludge in the buffer system 31 and the waste water treatment system 33 approaches the pre-warning line, open the waste valves Z15 and Z17 to clean the sludge, and the cleaned sludge enters the sludge treatment system 35 to be dried and harmlessly treated.

[0038] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. An in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises, characterized by: It comprises an in-situ injection-multiphase extraction system (1), an auxiliary system (2) and a repair system (3); the in-situ injection-multiphase extraction system (1) is connected to the auxiliary system (2) and the repair system (3) through pipelines respectively; The in-situ injection-multiphase extraction system (1) includes a No. 1 system (11) and a No. 2 system (12) arranged in parallel, wherein the No. 1 system (11) includes a plurality of No. 1 in-situ wells (13), injection and extraction valves, and connecting pipelines, and the No. 2 system (12) includes a No. 2 in-situ well (14), injection and extraction valves, and connecting pipelines.

2. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises according to claim 1 is characterized by: The auxiliary system (2) includes a medicine preparation system (21), an air compressor (23), a diaphragm pump (24), connecting pipelines and a plurality of valves.

3. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises according to claim 1 is characterized by: The repair system (3) includes a buffer system (31), a gas-liquid separation system (32), a waste gas treatment system (34), a wastewater treatment system (33) and a sludge treatment system (35).

4. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in an operating enterprise according to claim 1 is characterized by: The No. 1 in-situ well (13) and the No. 2 in-situ well (14) are arranged in a staggered manner.

5. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises according to claim 4 is characterized by: The No. 1 in-situ well (13) and the No. 2 in-situ well (14) are provided with an injection extraction pipe (15), an injection extraction valve, a pressure gauge and a reducing tee.

6. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in an operating enterprise according to claim 2 is characterized by: The first system (11) and the second system (12) are connected in parallel and communicated with the air compressor (23). The air supply line of the air compressor (23) is provided with an air supply valve, and a pressure gauge and a check valve are provided at the end of the air supply valve.

7. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in an operating enterprise according to claim 6 is characterized by: The discharge end of the drug preparation system (21) is provided with a rotor flowmeter (22) and a discharge valve, the in-situ injection-multiphase extraction system (1) and the diaphragm pump (24) are provided with an extraction valve and a feed valve in parallel and switchably therebetween, and the diaphragm pump (24) and the repair system (3) are provided with a drain valve.

8. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises according to claim 7 is characterized by: When the discharge valve, the feed valve, and the air supply valve are opened, the extraction valve and the sewage discharge valve are closed.

9. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in production enterprises according to claim 7 is characterized by: When the extraction valve and the sewage discharge valve are opened, the air supply valve, the discharge valve and the feed valve are closed.

10. The in-situ dual-machine independent linkage remediation system for soil and groundwater pollution in an operating enterprise according to claim 5, characterized in that: The apertures of the No. 1 in-situ well (13) and the No. 2 in-situ well (14) are less than 50 mm, and the diameter of the injection extraction tube (15) is less than 32 mm.

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