CN110695071A - In-situ heat injection system and process for composite organic pollution site - Google Patents
In-situ heat injection system and process for composite organic pollution site Download PDFInfo
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- CN110695071A CN110695071A CN201910833898.3A CN201910833898A CN110695071A CN 110695071 A CN110695071 A CN 110695071A CN 201910833898 A CN201910833898 A CN 201910833898A CN 110695071 A CN110695071 A CN 110695071A
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 26
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000008439 repair process Effects 0.000 claims abstract description 16
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- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 4
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- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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Abstract
The invention discloses an in-situ heat injection system and a process for a composite organic pollution site. The invention adopts high-temperature CO2、N2Directly contacting with water vapor and an organic pollutant stratum, and carrying out in-situ thermal drive desorption on the composite organic matters by utilizing gas drive, particularly the dissolution characteristic of carbon dioxide gas on organic gas; the distributed horizontal wells are distributed horizontally in a snake shape underground, and circularly heat the stratum polluted by the compound organic matters; composition sucked out of extraction wellThe organic matter hot gas is utilized twice, namely, the heat of the stratum is preserved for the first time, and the air is heated for the second time to improve the energy of the combustion gas; the same process can realize the multi-process coupling repair of the polluted stratum by gas thermal desorption, chemical/oxidation reduction and microbial repair, and a sectional sieve tube form is adopted for heat injection.
Description
Technical Field
The invention relates to the field of stratum restoration, in particular to an in-situ heat injection system and process for a composite organic pollution site.
Background
The composite organic pollution mainly comprises halogenated hydrocarbon, petroleum hydrocarbon, polycyclic aromatic hydrocarbon and the like, and the current treatment of the composite organic pollution site mainly comprises two basic processes of heterotopic thermal desorption and in-situ thermal desorption, wherein a large amount of pungent gas is generated in the heterotopic thermal desorption repair process to pollute the atmosphere, and the repair workload is large and the cost is high; the in-situ thermal desorption mainly comprises the forms of gas thermal desorption, steam thermal desorption, electrothermal desorption and the like, wherein the gas thermal desorption utilizes heat generated by gas combustion to repair the stratum, the temperature can reach 400 ℃ or even higher, almost all organic pollutants can be removed, and the method is a thermal repair method with good development prospect.
However, in the current gas thermal desorption repair process, the following problems exist; (1) high-temperature gas generated by combustion is not directly contacted with the stratum, only depends on heat transfer to the stratum, and the temperature is high when the high-temperature gas is discharged, so that the energy utilization rate is low; (2) during repair, the diameter of the combustion well is small, the generated heat is small, so that the devices such as burners arranged on the ground are dense, and the device investment is large; (3) in the repairing process, the temperature of tail gas extracted from the stratum is high, but the tail gas cannot be utilized, so that energy is wasted, and the burden of gas-liquid separation is increased; (4) in-situ thermal desorption is mainly repaired by adopting a vertical shaft, the repairing effect on deep (more than or equal to 15m) low-permeability organic polluted sites is poor, and the repairing cost rises sharply.
Disclosure of Invention
In view of the above disadvantages and shortcomings in the prior art, the present invention provides an in-situ thermal injection system for a composite organic contaminated site and a repairing process thereof.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a compound organic pollution place normal position heat injection system, includes combustor, burning well, heat preservation well and horizontal well, combustor and burning well intercommunication, the burning well passes through the pipeline intercommunication with heat preservation well and horizontal well respectively, the horizontal segment of horizontal well is located the below of heat preservation well, it has the gas injection hole to open on the wall of a well of horizontal well.
Preferably, the system also comprises a tail gas heat-preservation well and an extraction well, wherein the wall of the extraction well is provided with a suction hole, and the extraction well is communicated with the tail gas heat-preservation well.
Preferably, the system further comprises a water-gas separation device, the tail gas heat-preservation well is communicated with the water-gas separation device, and a water outlet and an exhaust port of the water-gas separation device are respectively communicated with a water pump and a pumping and exhausting fan.
Preferably, a heat exchange pipeline is wound in the water-gas separation device and communicated with the combustor.
Preferably, the combustion well and the horizontal well are communicated with each other through a pipeline, the horizontal well comprises a plurality of horizontal wells, the multi-section horizontal well comprises a horizontal section and inclined sections at two ends of the horizontal section, a gas injection hole is formed in the well wall of the horizontal section, and the inclined sections are steel pipes; the distributed horizontal wells are arranged in parallel and connected together in an end-to-end communication mode to form a distributed horizontal well, a gas injection valve is arranged on a pipeline for communicating the distributed horizontal well with the combustion well, and an exhaust valve is arranged at an opening at the other end of the distributed horizontal well.
An in-situ thermal injection process for a composite organic pollution site comprises the following steps:
s1, drilling holes in the polluted site and mounting well pipes to form a combustion well, a heat preservation well and a horizontal well according to the distribution and the quantity of the combustion well, the heat preservation well and the horizontal well according to the size of the polluted site, forming a gas injection hole in the wall of the horizontal well, connecting the horizontal wells together in an end-to-end communication mode to form a distributed horizontal well, wherein the horizontal section of the horizontal well is located below the combustion well, the heat preservation well and the polluted stratum;
s2, installing a burner at the combustion well, arranging pipelines communicated between the burner and the combustion well, between the combustion well and the heat preservation well and between the combustion well and the distributed horizontal well, arranging a gas injection valve on the pipeline communicated between the distributed horizontal well and the combustion well, and arranging an exhaust valve at an opening at the other end of the distributed horizontal well;
s3, closing the gas injection valve, igniting and heating gas in the combustion well through a burner, injecting heat energy generated by combustion into the heat-insulating well through the gas injection pump along with the gas generated by combustion, evacuating air in the heat-insulating well, and forming a radiation source to perform heat radiation and heat conduction to the surrounding stratum along with the injection of the gas carrying the heat energy in the heat-insulating well;
and S4, opening a gas injection valve and an exhaust valve of the distributed horizontal well, evacuating air in the distributed horizontal well through gas carrying heat energy, and closing the gas injection valve and the exhaust valve when the temperature of gas exhausted from an opening at one end provided with the exhaust valve is the same as the temperature of gas injected from an opening at one end provided with the gas injection valve.
Preferably, in step S3, the gas is CO2、N2And water vapor, CO as carbide as the mixed gas is injected into the contaminated formation2Producing a solventing-out effect with organic pollutants in the polluted bottom layer; by carrying N of thermal energy2And desorbing the dissolved and separated pollutants by using water vapor.
Preferably, in step S1, an extraction well and a tail gas heat-preservation well are formed in the contaminated site by a drilling and well-completion process, a well wall of the extraction well is provided with an air suction hole, and the extraction well is communicated with the heat-preservation well through a pipeline; in the soaking repair process, the extraction well sucks gas from the surrounding stratum through the suction holes on the well wall, and the gas in the extraction well is injected into the tail gas heat-insulating well for storage through the extraction fan.
Preferably, the soaking repair process is as follows:
closing a gas injection valve and an exhaust valve of the horizontal well, stopping combustion of the combustor, and shutting off a pipeline between the combustion well and the heat preservation well;
under the action of an extraction fan, the extraction well sucks gas from the surrounding stratum through a suction hole on the well wall, the gas in the extraction well is injected into a tail gas heat-insulating well through the extraction fan, and then the gas is discharged into a water-gas separation device through a pipeline for gas-water separation post-treatment;
when the temperature in the tail gas insulated well is reduced to 50-80 ℃, injecting a liquid chemical/oxidation reduction remediation agent into the polluted layer through the extraction well; and when the temperature in the tail gas insulated well is continuously reduced to 30-50 ℃, injecting a microorganism culture medium through the extraction well.
Preferably, the tail gas in the tail gas heat-insulating well is communicated with a water-gas separation device arranged on the ground, the water-gas separation device separates gas and water in the tail gas, and then the gas and the water are collected into a tail gas treatment device and water treatment equipment for treatment through a pumping and exhausting fan and a centrifugal water pump respectively, and the tail gas is discharged after meeting the discharge standard; air for assisting gas combustion in the combustor is injected into the combustor through a pipeline, the pipeline is provided with a heat exchange section, and the heat exchange section is wound in the water-gas separation device; and after entering the water-gas separation device, the tail gas can exchange heat with air in the heat exchange section, and the air heated by the heat exchange is injected into the combustor through the combustion fan.
Compared with the prior art, the embodiment of the invention at least has the following advantages:
(1) the high-temperature carbon dioxide, nitrogen and water vapor are directly contacted with the organic pollutant stratum, and the thermal drive desorption of the compound organic matters is carried out by utilizing gas drive, particularly the dissolution characteristic of the carbon dioxide gas to the organic gas;
(2) the distributed horizontal wells are distributed horizontally in a snake shape underground and circularly heat the composite organic matter stratum;
(3) adopting a repair process of mutually parallel multi-horizontal well hot steam injection and vertical well extraction;
(4) the hot gas of the compound organic matters pumped out by the extraction well is utilized for the second time, namely the process of heating and preserving the stratum is utilized for the first time, and the air is heated for the second time to improve the energy of the combustion gas;
(5) repairing the polluted stratum by coupling multiple processes such as gas thermal desorption, chemical/oxidation reduction, microbial repair and the like;
(6) a segmented screen format is used for hot injection.
Drawings
FIG. 1 is a schematic view of an in-situ heat injection system for a composite organic contaminated site according to the present invention;
FIG. 2 is a schematic view of the spatial distribution of the in-situ thermal injection system for a composite organic contaminated site according to the present invention;
FIG. 3 is a schematic diagram of the horizontal pipe distribution of the in-situ heat injection system for a composite organic contaminated site according to the present invention;
fig. 4 is a schematic structural diagram of a tail gas heat-preservation well of the in-situ heat injection coupling repair system for the composite organic contaminated site.
In the figure, 1, a burner; 2. a combustion well; 3. a heat-preservation well; 4. horizontal wells; 5. a screen pipe; 6. a steel pipe; 7. a gas injection hole; 8. an extraction well; 9. a suction hole; 10. a gas injection valve; 11. an exhaust valve; 12. a tail gas heat-preservation well; 13. a high-temperature air injection pump; 14. a water-gas separation device; 15. a thermometer; 16. a pressure gauge; 17. a flow meter; 18. a heat exchange pipe; 19. an extraction fan; 20. a combustion fan; 21. a pumping and exhausting fan; 22. a centrifugal water pump; 23. a water treatment device; 24. tail gas treatment equipment; 25. a throttle valve.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings, which are illustrative and not restrictive, and the scope of the present invention is not limited thereto.
As shown in fig. 1, the injection system includes a gas injection section and a tail gas recovery section.
The gas injection part comprises a burner 1, the burner 1 is communicated with a combustion well 2 through a pipeline, and the pipeline is directly communicated to the bottom of the combustion well 2. Gas (natural gas or liquefied petroleum gas) and air are introduced into the combustor 1 through an air pipeline and a gas pipeline with a throttle valve 25, flow meters 17 are arranged on the pipelines, the throttle valves 25 on the air pipeline and the gas pipeline are opened to enable the gas and the air to enter the combustor 1, after the gas is ignited in the combustor 1, the gas directly enters a combustion well along the pipelines to start combustion, and the gas generated by combustion carries heat to be discharged out of the combustion well 2 and enters a subsequent heat-preservation well 3 through corresponding pipelines.
The combustion well 2 in the present embodiment differs from the combustion well in the prior art as follows:
the diameter of the combustion well 2 is large, is more than or equal to 500mm, the depth is about half of the depth of a stratum to be repaired, the combustion well can be dug to form a hole quickly, a steel pipe 6 is adopted to be installed with a matched flange, the bottom of the combustion well is not sealed, and the combustion well is used for generating high-temperature hot gas. The combustion degree of the gas is controlled by monitoring the flow rate of the air and the gas entering the combustor 1 through the flow meters 17 on the air and gas pipes and then controlling the flow rates of both by means of the throttle valve 25. In addition, a pressure gauge 16 is provided in a pipe connecting the burner 1 and the combustion well 2, and detects the pressure of the fluid entering the combustion well 2.
According to the analysis of the gas generated by the combustion of the gas, the gas generated from the combustion well 2 and accompanied with the heat energy comprises carbon dioxide, nitrogen and water vapor, and the mixed gas of the carbon dioxide, the nitrogen and the water vapor is respectively injected into the horizontal well 4 and the heat preservation well 3 through the high-temperature gas injection pump 13. A thermometer 15, a pressure gauge 16 and a flowmeter 17 are sequentially arranged on a channel which is communicated with the combustion well 2 and the air inlet of the high-temperature air injection pump 13.
The high-temperature fuel gas pumped out from the high-temperature gas injection pump 13 firstly enters the heat-insulating well 3, the diameter of the heat-insulating well 3 relative to the combustion well 2 is set to be 200mm, the depth of the heat-insulating well is close to the lower limit of a pollution layer (refer to the lower limit C-C of the pollution layer in figure 1), and the distance between the heat-insulating well 3 and the lower limit of the pollution layer is about 0.5 m. The shaft of the heat-insulating well 3 is closed, and the bottom of the heat-insulating well can be unsealed, so that high-temperature gas generated after injection and combustion can enter the heat-insulating well conveniently.
The horizontal well 4 can be arranged in a mode of referring to fig. 3, the horizontal well 4 is arranged at equal intervals according to the range of a pollution site, the horizontal well 4 is divided into a horizontal screen pipe 5 and an inclined steel pipe 6, the horizontal screen pipe 5 is located at the lower limit (position shown by C-C in fig. 1) of a pollution layer by about 0.5m, and holes in the screen pipe 5 are gas injection holes 7 for injecting high-temperature gas into peripheral strata/polluted underground water. The horizontal well 4 adopts a mode of sequentially connecting the head and the tail to form a distributed horizontal well, so that snake-shaped distribution is formed below a pollution layer. An air injection valve 10 is arranged at an opening communicated with the combustion well 2, and an exhaust valve 11 is arranged at the other opening of the distributed horizontal well. After the gas injection valve 10 and the exhaust valve 11 are opened, the high-temperature gas injection pump 13 pumps the high-temperature and high-pressure (the temperature is more than or equal to 100 ℃ and the pressure is more than or equal to 1Mpa) mixed gas into the distributed horizontal well, the mixed gas enters the distributed horizontal well from one end of the gas injection valve 10, and then the high-temperature and high-pressure mixed gas extrudes the air originally distributed in the horizontal well 4 out of the horizontal well 4. When the temperature of the gas discharged from the exhaust valve 11 reaches 100 ℃, it is proved that the horizontal well 4 is filled with the mixed gas of high temperature and high pressure. At this time, the gas injection valve 10 and the gas exhaust valve 11 are closed, and the mixture gas is pressed into the surrounding soil or polluted groundwater through the gas injection holes 7 of the screen pipe 5.
The pipelines communicated between the horizontal wells 4 can be arranged on a floating soil covering layer (refer to a floating soil covering layer B-B in figure 1) by utilizing steel pipes arranged in an oblique mode, and the heat is preserved by adopting a film covering mode, so that the construction is convenient.
The gas injection part is arranged above the tail gas recovery part, and the tail gas recovery part is arranged below the tail gas recovery part. The tail gas recovery part at least comprises a tail gas heat-preservation well 12 and an extraction well 8.
The diameter and the setting depth of the extraction well 8 are consistent with those of the heat preservation well 3, and the extraction well is different from the heat preservation well 3 in that a suction hole 9 is arranged on the wall of the extraction well 8. Gas in the surrounding soil layer or polluted underground water enters the extraction well 8 through the air suction holes 9, the extraction fan 19 provides power for the gas in the soil layer to enter the extraction well 8, and the tail gas in the extraction well 8 is conveyed to the tail gas heat preservation well 12 to be stored. Referring to the relative relationship between the tail gas heat-preserving well 12 and the floating soil covering layer B-B in FIG. 1, the tail gas heat-preserving well 12 is located below the floating soil covering layer and at the edge of the polluted site, and heat preservation is carried out on tail gas by utilizing terrestrial heat, so that the energy utilization rate is improved.
The structure of the tail gas heat-insulating well 12 is shown in fig. 4, the heat-insulating well 3 comprises an inner well wall and an outer well wall, an annular space is formed between the two well walls, tail gas conveyed from the extraction well 8 is injected into the inner well wall, and when the tail gas reaches the other end of the inner well wall, the tail gas enters the annular space between the inner well wall and the outer well wall from an opening at the other end. The tail gas can be insulated by utilizing a geothermal energy source, heat radiation and heat conduction can be carried out on the peripheral stratum through the tail gas (50-100 ℃) which still carries heat energy, and when the temperature of the tail gas is consumed to be balanced with the temperature of the peripheral stratum, the tail gas is conveyed to the water-gas separation device 14 on the ground for water-gas separation.
The water-gas separation device 14 comprises a tail gas injection channel, a water outlet and an exhaust port after separation, the water outlet and the exhaust port are respectively connected with a centrifugal water pump 22 and a pumping and exhausting fan 21, the separated tail gas and tail water are respectively discharged to a tail gas treatment device 24 and a water treatment device 23 through the pumping and exhausting fan 21 and the centrifugal water pump 22 for treatment, and the treated tail gas and tail water are discharged after reaching the discharge standard.
In addition, in order to further recover energy, a heat exchange pipe 18 is wound on the tail gas injection channel of the water-gas separation device 14, one end of the heat exchange pipe 18 is opened for sucking air, the other end of the heat exchange pipe is communicated with an air inlet of a combustion fan 20, and the air is conveyed to the combustor 1 for combustion supporting through the combustion fan 20. When the system is initially operated, no heat exchange exists because no tail gas exists; when tail gas is generated and conveyed to the water-gas separation device 14, the air entering the heat exchange tube 18 can exchange heat with the tail gas in the tail gas injection channel, so that the air sent to the combustor 1 by the combustion fan 20 is hot air, and the effect of recycling the waste heat of the tail gas is achieved.
It should be noted that, except for necessary pipes (such as a pipe at a section where the tail gas heat-insulating well 12 extends out of the ground and is communicated with the water-gas separation device 14, a pipe above the ground when the high-temperature gas injection pump 13 is communicated with the combustion well 2 and the heat-insulating well 3, a pipe where the combustor 1 is communicated with the water-gas separation device 14, and the like) which need to be communicated with the ground, the whole polluted field ground is sealed by covering with floating soil and then sealing with a sealing plastic film, so that heat in the lower pipe and the soil layer cannot be rapidly lost.
In order to avoid overhigh pressure of gas injected into the distributed horizontal wells, the high-temperature gas injection pump 13, the distributed horizontal wells and the heat-preservation wells 3 are communicated through three-way pipelines, and valves are arranged at the well mouths of the heat-preservation wells 3. The valve at the wellhead of the heat-preservation well 3 can be opened manually or automatically (depending on the matching mode of a sensor, an upper computer early warning control system and an electromagnetic valve) under the condition of overhigh pressure in the distributed horizontal well, so that the gas in the horizontal well 4 flows back into the heat-preservation well 3, and a buffering effect is achieved. Therefore, the insulated well 3 is also used to regulate the injection pressure (similar to an accumulator), effectively reducing heat loss and improving control accuracy.
Specifically, when the system is applied to the organic pollution site restoration, the process from site layout to restoration is as follows:
step 1: the method comprises the following steps of (1) arranging and leveling a field, removing impurities on the ground, and drilling to form a combustion well 2, a heat preservation well 3 and the like;
step 2: installing ground equipment (a combustor 1, a high-temperature air injection pump 13, a water-gas separation device 14 and the like), back-dragging and installing pipelines of a horizontal well 4, sequentially connecting the pipelines end to form a distributed horizontal well, and burying a tail gas heat preservation pipeline in the ground;
and 3, step 3: before in-situ injection, exhausting air in the pipeline, and performing injection test until the temperature in the tail gas heat-preservation pipeline rises to 100 ℃ (for convenience of detection, a thermometer 15 is arranged on the pipeline which is positioned above the ground and is connected with the water-gas separation device 14);
and 4, step 4: keeping an extraction device (an extraction fan 19) and a tail gas treatment device (a combustion fan 20) running, closing other devices (a combustor 1, a high-pressure air injection pump, the combustion fan 20, a water-gas separation device 14) and a pipeline valve, and carrying out soaking extraction operation;
and 5, step 5: when the extraction flow rate is obviously reduced, restarting the heating cycle of the system;
and 6, step 6: repeating the step 4 and the step 5 again when the temperature in the heat-insulating pipeline rises to 100 ℃ again;
and 7, step 7: when the temperature in the tail gas heat-preservation pipeline is reduced to 60 ℃, a repairing medicament can be injected into the polluted soil and the underground water through the extraction well 8 for combined repairing;
and 8, step 8: and when the restoration reaches the standard, dismantling the system, recovering the site and finishing the restoration process.
Wherein, the process about the in-situ heat injection is as follows:
step 1: closing a gas injection valve 10 of the distributed horizontal well, igniting and heating gas in the combustion well 2 to provide a heat source, injecting hot steam generated by combustion into the heat preservation well 3 firstly, and evacuating air to generate heat to radiate and conduct to the stratum;
step 2: opening a gas injection valve 10 and an exhaust valve 11 at the other side of the distributed horizontal well to exhaust air in the distributed horizontal well;
and 3, step 3: gradually injecting hot gaseous carbon dioxide, nitrogen and water vapor into the distributed horizontal well, and monitoring the heating and burning speed through a throttle valve 25 and a flowmeter 17 on a fuel gas and air pipeline on the combustor 1 until high-temperature hot gas (more than or equal to 100 ℃) is discharged from one side of an exhaust valve 11 of the distributed horizontal well;
and 4, step 4: keeping an extraction device (an extraction fan 19) and a tail gas treatment device (a combustion fan 20) running, closing other devices (a combustor 1, a high-pressure air injection pump, the combustion fan 20, a water-gas separation device 14) and a pipeline valve, and carrying out soaking extraction operation;
and 5, step 5: the extraction well 8 continuously extracts and absorbs the gas containing the compound organic matters, and the gas is collected for treatment;
and 6, step 6: repeating the operations of ignition heating, closing and soaking, and matching with the thermal restoration process.
Compared with the traditional gas heat injection mode, the system has different application modes and great difference in structure:
1. as shown in fig. 2, after the contaminated site area is determined, the installation intervals of the combustion well 2, the holding well 3 and the extraction well 8 are designed as required. As mentioned above, the diameter of the combustion well 2 is larger, so compared with the traditional combustion well 2, the depth can be reduced to reach half of the depth of the stratum to be repaired, holes can be dug out, the steel pipe 6 is adopted to be installed with a matched flange, the bottom does not need to be sealed, and the combustion well is used for generating high-temperature hot gas and injecting the high-temperature hot gas into the heat preservation well 3 and the distributed horizontal well. The well arrangement mode of changing into major diameter burning well 2 cooperation heat preservation well 3 has not only reduced the quantity of former thermal desorption burning well 2, then need not like digging a large amount of burning wells 2 in traditional handicraft, the quantity that has also corresponded simultaneously has reduced combustor 1, has reduced equipment investment and control degree of difficulty.
2. And a distributed horizontal well and a high-temperature air injection pump 13 are added to generate high-temperature steam, so that the combined driving of high-temperature carbon dioxide, nitrogen and water vapor is realized. Through thermal desorption,The chemical/redox and microbial remediation multi-process coupling remediation technology comprises the steps of firstly carrying out thermal desorption on composite organic pollutants at a temperature of more than or equal to 80 ℃, then injecting liquid chemical/redox and other remediation agents into an extraction well at a temperature of 50-80 ℃, and finally exciting microorganisms to restore the stratum with maximum activity at a temperature of 30-50 ℃, thus repeatedly completing remediation of the composite polluted organic matters. In particular CO2The gas has the characteristic of dissolving out organic gas, the hot gas reduces the viscosity of the compound organic matter, the steam enhances the distillation and the like, and the thermal flooding desorption effect of the compound organic matter is improved.
3. The acquisition units such as the flowmeter 17, the pressure gauge 16, the thermometer 15 and the like are added on corresponding surface equipment and pipelines, so that the parameters such as the temperature, the flow rate, the pressure and the like of surface fluid and formations and fluids below the surface can be acquired better, and the whole system can be controlled better.
4. The distributed horizontal well circularly heats the composite organic matter polluted stratum, the vertical extraction well 8 extracts, the tail gas heat preservation pipeline is also positioned in the stratum close to the ground (between the floating soil covering layer B-B and the ground in the figure 1), and the tail gas waste heat of the water-gas separation device 14 is utilized to heat the air used during combustion, so that the heat is fully utilized.
5. Under the condition that the pressure of the injection well is too high, a valve of the heat-insulating well 3 can be manually/automatically opened, the injection pressure (similar to an energy accumulator) is adjusted by utilizing the heat-insulating well 3, the heat loss is effectively reduced, and the control precision is improved.
6. And (4) recharging the extracted hot tail gas into the stratum for heat preservation, and separating after heat consumption.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The in-situ heat injection system for the composite organic pollution site is characterized by comprising a combustor, a combustion well, a heat preservation well and a horizontal well, wherein the combustor is communicated with the combustion well, the combustion well is communicated with the heat preservation well and the horizontal well respectively, the horizontal section of the horizontal well is located below the heat preservation well, and a gas injection hole is formed in the wall of the horizontal well.
2. The in-situ heat injection system for the composite organic pollution site as claimed in claim 1, further comprising a tail gas heat-preservation well and an extraction well, wherein the wall of the extraction well is provided with a suction hole, and the extraction well is communicated with the tail gas heat-preservation well.
3. The in-situ heat injection system for the composite organic pollution site as claimed in claim 2, further comprising a water-gas separation device, wherein the tail gas heat preservation well is communicated with the water-gas separation device, and a water outlet and an air outlet of the water-gas separation device are respectively communicated with a water pump and a pumping and exhausting fan.
4. The in-situ heat injection system for a composite organic pollution site as claimed in claim 3, wherein a heat exchange pipe is wound in the water-gas separation device, and the heat exchange pipe is communicated with the burner.
5. The in-situ heat injection system for the composite organic pollution site as claimed in any one of claims 1 to 4, wherein the combustion well is communicated with a plurality of horizontal wells through a pipeline, each horizontal well comprises a horizontal section and inclined sections at two ends of the horizontal section, a gas injection hole is formed in the wall of the horizontal section, and each inclined section is a steel pipe; the distributed horizontal wells are arranged in parallel and connected together in an end-to-end communication mode to form a distributed horizontal well, a gas injection valve is arranged on a pipeline for communicating the distributed horizontal well with the combustion well, and an exhaust valve is arranged at an opening at the other end of the distributed horizontal well.
6. An in-situ thermal injection process for a composite organic contaminated site is characterized by comprising the following steps:
s1, drilling holes in the polluted site and mounting well pipes to form a combustion well, a heat preservation well and a horizontal well according to the distribution and the quantity of the combustion well, the heat preservation well and the horizontal well according to the size of the polluted site, forming a gas injection hole in the wall of the horizontal well, connecting the horizontal wells together in an end-to-end communication mode to form a distributed horizontal well, wherein the horizontal section of the horizontal well is located below the combustion well, the heat preservation well and the polluted stratum;
s2, installing a burner at the combustion well, arranging pipelines communicated between the burner and the combustion well, between the combustion well and the heat preservation well and between the combustion well and the distributed horizontal well, arranging a gas injection valve on the pipeline communicated between the distributed horizontal well and the combustion well, and arranging an exhaust valve at an opening at the other end of the distributed horizontal well;
s3, closing the gas injection valve, igniting and heating gas in the combustion well through a burner, injecting heat energy generated by combustion into the heat-insulating well through the gas injection pump along with the gas generated by combustion, evacuating air in the heat-insulating well, and forming a radiation source to perform heat radiation and heat conduction to the surrounding stratum along with the injection of the gas carrying the heat energy in the heat-insulating well;
and S4, opening a gas injection valve and an exhaust valve of the distributed horizontal well, evacuating air in the distributed horizontal well through gas carrying heat energy, and closing the gas injection valve and the exhaust valve when the temperature of gas exhausted from an opening at one end provided with the exhaust valve is the same as the temperature of gas injected from an opening at one end provided with the gas injection valve.
7. The composite organic contaminated site in-situ thermal injection process according to claim 6, wherein in step S3, said gas is CO2、N2And water vapor, CO as carbide as the mixed gas is injected into the contaminated formation2Producing a solventing-out effect with organic contaminants in the contaminated formation; by carrying N of thermal energy2And desorbing the dissolved and separated pollutants by using water vapor.
8. The in-situ heat injection coupling repair process for the composite organic contaminated site according to claim 7, wherein in step S1, the process further comprises forming an extraction well and a tail gas heat-preservation well in the contaminated site through a drilling and well-completion process, wherein the extraction well is provided with a suction hole on a wall thereof and is communicated with the heat-preservation well through a pipeline; in the soaking repair process, the extraction well sucks gas from the surrounding stratum through the suction holes on the well wall, and the gas in the extraction well is injected into the tail gas heat-insulating well for storage through the extraction fan.
9. The composite organic contaminated site in-situ heat injection process according to claim 8, wherein the soaking repair process is as follows:
closing a gas injection valve and an exhaust valve of the horizontal well, stopping combustion of the combustor, and shutting off a pipeline between the combustion well and the heat preservation well;
under the action of an extraction fan, the extraction well sucks gas from the surrounding stratum through a suction hole on the well wall, the gas in the extraction well is injected into a tail gas heat-insulating well through the extraction fan, and then the gas is discharged into a water-gas separation device through a pipeline for gas-water separation post-treatment;
when the temperature in the tail gas insulated well is reduced to 50-80 ℃, injecting a liquid chemical/oxidation reduction remediation agent into the polluted layer through the extraction well; and when the temperature in the tail gas insulated well is continuously reduced to 30-50 ℃, injecting a microorganism culture medium through the extraction well.
10. The in-situ thermal injection process for the composite organic pollution site as claimed in claim 8, wherein the tail gas in the tail gas insulated well is communicated with a water-gas separation device arranged on the ground, and the water-gas separation device separates gas and water in the tail gas, collects the gas and water into a tail gas treatment device and a water treatment device for treatment through a pumping and exhausting fan and a centrifugal water pump respectively, and discharges the tail gas after meeting the discharge standard; air for assisting gas combustion in the combustor is injected into the combustor through a pipeline, the pipeline is provided with a heat exchange section, and the heat exchange section is wound in the water-gas separation device; and after entering the water-gas separation device, the tail gas can exchange heat with air in the heat exchange section, and the air heated by the heat exchange is injected into the combustor through the combustion fan.
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| PCT/CN2019/113667 WO2021042463A1 (en) | 2019-09-04 | 2019-10-28 | In-situ thermal injection system and process for composite organic contamination site |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822496A (en) * | 2020-07-29 | 2020-10-27 | 广东佳德环保科技有限公司 | In-situ soil remediation system and method based on gas thermal desorption |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020003988A1 (en) * | 1997-05-20 | 2002-01-10 | Thomas Mikus | Remediation method |
| JP2002239524A (en) * | 2001-02-21 | 2002-08-27 | Kajima Corp | Method and apparatus for cleaning contaminated soil |
| CN104324938A (en) * | 2014-11-18 | 2015-02-04 | 青岛新天地环境保护有限责任公司 | Horizontal permeable reaction layer for soil remediation and soil remediating method |
| CN104815840A (en) * | 2015-04-30 | 2015-08-05 | 太仓百诺纳米科技有限公司 | Method and system for contaminant removal by injecting high-temperature dry gas into soil |
| CN105665433A (en) * | 2016-02-26 | 2016-06-15 | 上海宝发环科技术有限公司 | Soil contamination in-situ desorption method and device |
| CN106077064A (en) * | 2016-06-03 | 2016-11-09 | 北京建工环境修复股份有限公司 | A kind of steam extracting soil repair system |
| CN107350278A (en) * | 2017-07-18 | 2017-11-17 | 中国地质大学（武汉） | Collaboration removes the in-situ remediation system and method for soil and groundwater organic pollution |
| CN107685072A (en) * | 2017-09-26 | 2018-02-13 | 上海格林曼环境技术有限公司 | A kind of method of concentrated combustion formula original position thermal desorption reparation for contaminated site |
| CN210816696U (en) * | 2019-09-04 | 2020-06-23 | 中国地质大学（北京） | In-situ heat injection system for composite organic pollution site |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2817106A4 (en) * | 2012-02-24 | 2015-08-19 | Grant Geckeler | Advanced thermal conductive heater system for environmental remediation and the destruction of pollutants |
| CN204769854U (en) * | 2015-06-29 | 2015-11-18 | 中石化炼化工程（集团）股份有限公司 | Organic contaminated soil's hot -air is reinforceed gaseous phase and is extracted normal position prosthetic devices |
| CN205289226U (en) * | 2015-12-30 | 2016-06-08 | 北京高能时代环境技术股份有限公司 | A normal position thermal desorption system for handling VOCSVOC pollutes soil |
| CN107685073B (en) * | 2017-09-26 | 2024-05-14 | 上海格林曼环境技术有限公司 | Centralized combustion type in-situ thermal desorption repairing device for polluted site |
| CN109248910A (en) * | 2018-10-31 | 2019-01-22 | 中冶焦耐(大连)工程技术有限公司 | The system and method for purifying organic polluted soil is desorbed using burning hot wind in-situ heat |
-
2019
- 2019-09-04 CN CN201910833898.3A patent/CN110695071B/en active Active
- 2019-10-28 WO PCT/CN2019/113667 patent/WO2021042463A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020003988A1 (en) * | 1997-05-20 | 2002-01-10 | Thomas Mikus | Remediation method |
| JP2002239524A (en) * | 2001-02-21 | 2002-08-27 | Kajima Corp | Method and apparatus for cleaning contaminated soil |
| CN104324938A (en) * | 2014-11-18 | 2015-02-04 | 青岛新天地环境保护有限责任公司 | Horizontal permeable reaction layer for soil remediation and soil remediating method |
| CN104815840A (en) * | 2015-04-30 | 2015-08-05 | 太仓百诺纳米科技有限公司 | Method and system for contaminant removal by injecting high-temperature dry gas into soil |
| CN105665433A (en) * | 2016-02-26 | 2016-06-15 | 上海宝发环科技术有限公司 | Soil contamination in-situ desorption method and device |
| CN106077064A (en) * | 2016-06-03 | 2016-11-09 | 北京建工环境修复股份有限公司 | A kind of steam extracting soil repair system |
| CN107350278A (en) * | 2017-07-18 | 2017-11-17 | 中国地质大学（武汉） | Collaboration removes the in-situ remediation system and method for soil and groundwater organic pollution |
| CN107685072A (en) * | 2017-09-26 | 2018-02-13 | 上海格林曼环境技术有限公司 | A kind of method of concentrated combustion formula original position thermal desorption reparation for contaminated site |
| CN210816696U (en) * | 2019-09-04 | 2020-06-23 | 中国地质大学（北京） | In-situ heat injection system for composite organic pollution site |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822496A (en) * | 2020-07-29 | 2020-10-27 | 广东佳德环保科技有限公司 | In-situ soil remediation system and method based on gas thermal desorption |
| CN114054489A (en) * | 2020-07-30 | 2022-02-18 | 中国石油天然气股份有限公司 | Method for removing organic pollutants in formation by in-situ generation of multi-element thermal fluid |
| CN112122327A (en) * | 2020-08-20 | 2020-12-25 | 杨晓秋 | Prosthetic devices based on soil thermal desorption repair technique |
| CN112122327B (en) * | 2020-08-20 | 2022-02-22 | 广州市番禺环境工程有限公司 | Prosthetic devices based on soil thermal desorption repair technique |
| CN112517623A (en) * | 2020-11-18 | 2021-03-19 | 重庆市生态环境科学研究院 | Organic contaminated soil prosthetic devices of normal position gas thermal desorption |
| CN112302598A (en) * | 2020-11-20 | 2021-02-02 | 西南石油大学 | System and method for generating steam underground in ultra-deep heavy oil reservoir |
| CN112705564A (en) * | 2020-12-08 | 2021-04-27 | 江苏维诗环境科技有限公司 | Thermal desorption temperature monitoring system based on remote management |
| CN112705565A (en) * | 2020-12-08 | 2021-04-27 | 江苏维诗环境科技有限公司 | Soil remediation system based on gas thermal desorption coupling bioremediation |
| CN112705564B (en) * | 2020-12-08 | 2022-04-05 | 江苏维诗环境科技有限公司 | Thermal desorption temperature monitoring system based on remote management |
| CN113172084A (en) * | 2021-05-10 | 2021-07-27 | 江苏大地益源环境修复有限公司 | Soil remediation system and method for enhancing thermal desorption effect |
| CN113369294A (en) * | 2021-06-10 | 2021-09-10 | 上海环土环境科技有限公司 | Polluted soil ex-situ low-carbon circulating thermal desorption system |
| CN113976605A (en) * | 2021-09-13 | 2022-01-28 | 昆明理工大学 | Contaminated soil thermal desorption remediation system and method based on eddy effect |
| CN114425559A (en) * | 2021-12-30 | 2022-05-03 | 中国石油化工股份有限公司 | In-situ thermal desorption remediation method for soil |
| CN115502193A (en) * | 2022-10-25 | 2022-12-23 | 生态环境部南京环境科学研究所 | Complete equipment and method for repairing polluted site based on in-situ thermal desorption technology |
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