CN112705565A - Soil remediation system based on gas thermal desorption coupling bioremediation - Google Patents
Soil remediation system based on gas thermal desorption coupling bioremediation Download PDFInfo
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- CN112705565A CN112705565A CN202011444029.0A CN202011444029A CN112705565A CN 112705565 A CN112705565 A CN 112705565A CN 202011444029 A CN202011444029 A CN 202011444029A CN 112705565 A CN112705565 A CN 112705565A
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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
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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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Abstract
The invention discloses a soil remediation system based on fuel gas thermal desorption coupling bioremediation, wherein a first communication pipe is arranged on a smoke exhaust pipe, a heating plate is detachably connected with the first communication pipe, a main pipeline is arranged on a nutrient agent evaporation box, a plurality of remediation branch pipes are arranged on a branch fluid, high-temperature smoke exhausted from a heating well is collected through a smoke collection box, the high-temperature smoke is conveyed to the heating plate through the first communication pipe on the smoke exhaust pipe, nutrient mixed liquid in the nutrient agent evaporation box is heated and evaporated into steam, the nutrient steam is conveyed into each remediation branch pipe through the branch fluid on the main pipeline, nutrient substances are conveyed to native microorganisms in contaminated soil of each remediation well through air holes, thereby improving the repair rate of the medium and low pollution areas through microbial repair.
Description
Technical Field
The invention relates to the technical field of soil thermal desorption equipment, in particular to a soil remediation system based on gas thermal desorption coupling bioremediation.
Background
The thermal desorption technology is a process of heating a polluted medium and pollutants contained in the polluted medium to a sufficient temperature through direct or indirect heat exchange to volatilize or separate the pollutants from the polluted medium, the soil indirect thermal desorption technology is a process of using smoke generated by fuel to indirectly exchange heat with soil to enable polluted components in the soil to reach the sufficient temperature and evaporate the polluted components and separate the polluted components from the soil medium, the organic pollutants usually have higher boiling points, the soil needs to be heated at higher temperature in the thermal desorption process, a large amount of high-temperature smoke is generated after heating, but the existing thermal desorption additional heat device is lack of utilization of the high-temperature smoke, and resource waste is caused.
Disclosure of Invention
The invention aims to provide a soil remediation system based on gas thermal desorption coupling bioremediation, and aims to solve the technical problem that resources are wasted due to the fact that an existing thermal desorption and heat addition device in the prior art is lack of utilization of high-temperature flue gas.
In order to achieve the purpose, the soil remediation system based on gas thermal desorption coupling bioremediation comprises a combustion blower, a burner, a gas pipe, a heating well, a flue gas recovery device, a nutrient and medicament evaporation tank, a main pipeline, a plurality of remediation branch pipelines and a plurality of remediation wells, wherein one end of the burner is connected with the combustion blower pipeline, the other end of the burner is connected with the gas pipe pipeline, the burner is provided with the gas pipe, a heat exchange wall is arranged on the inner wall of the heating well, the heating pipe is positioned in the heat exchange wall, and the flue gas recovery device is arranged above the heating well;
the flue gas recovery device comprises a flue gas collecting box, a smoke exhaust pipe, a first communicating pipe and a heating plate, wherein the flue gas collecting box is positioned above the heating well, the smoke discharge pipe is arranged on the smoke collection box, the first communicating pipe is arranged on the smoke discharge pipe, the heating plate is detachably connected with the first communicating pipe, and is positioned at one end of the first communicating pipe far away from the smoke exhaust pipe, the nutrient medicament evaporation box is detachably connected with the heating plate, and is positioned at one end of the heating plate far away from the first communicating pipe, the main pipeline is arranged on the nutrient medicament evaporation box, the trunk line is kept away from the one end of nutrition medicament evaporating box is provided with the reposition of redundant personnel, be provided with a plurality ofly on the reposition of redundant personnel restore the branch pipeline, every restore the branch pipeline and be located the correspondence respectively in the restoration well, every restore and all be provided with a plurality of gas pockets on the branch pipeline.
Wherein, the hot plate is including solid fixed ring and plate body, gu fixed ring with first connecting pipe can dismantle the connection, and be located the outside of first connecting pipe, the plate body with gu fixed ring block is connected, and is located gu fixed ring's top, be provided with the cavity on the plate body, the cavity with the mouth of pipe of first connecting pipe is corresponding, be provided with a plurality of through-holes on the cavity.
The fixing ring comprises a first arc-shaped plate, a second arc-shaped plate, a clamping plate and a connecting block, wherein the plate body is further provided with a clamping groove, the clamping plate is arranged on the first arc-shaped plate and the second arc-shaped plate, the clamping plate is matched with the clamping groove, the connecting block is arranged at each of two ends of the first arc-shaped plate and the second arc-shaped plate, and the connecting block on the first arc-shaped plate is connected with the connecting block on the second arc-shaped plate through a bolt.
The soil remediation system based on gas thermal desorption coupling bioremediation further comprises an air preheating pipe, wherein the air preheating pipe is connected with the combustion blower through a pipeline and is positioned at one end, far away from the combustor, of the combustion blower.
The smoke exhaust pipe is also provided with a second communicating pipe, the second communicating pipe is provided with a heating arc plate, and the heating arc plate corresponds to the air preheating pipe.
The smoke exhaust pipe is characterized in that two throttling pieces are further arranged inside the smoke exhaust pipe, and each throttling piece corresponds to the first communicating pipe and the second communicating pipe respectively.
The invention has the beneficial effects that: the smoke collecting box is positioned above the heating well, the smoke discharging pipe is arranged on the smoke collecting box, the first communicating pipe is arranged on the smoke discharging pipe, the heating plate is detachably connected with the first communicating pipe and positioned at one end of the first communicating pipe far away from the smoke discharging pipe, the nutrient agent evaporating box is detachably connected with the heating plate and positioned at one end of the heating plate far away from the first communicating pipe, the nutrient agent evaporating box is provided with the main pipeline, one end of the main pipeline far away from the nutrient agent evaporating box is provided with a shunting body, the shunting body is provided with a plurality of repairing branch pipelines, each repairing branch pipeline is respectively positioned in the corresponding repairing well, each repairing branch pipeline is provided with a plurality of air holes, and high-temperature smoke discharged from the heating well is collected through the smoke collecting box, through on the pipe of discharging fume first communicating pipe carry high temperature flue gas extremely the hot plate makes nutrient solution in the nutrient solution evaporation tank is heated to evaporate and becomes steam, through carry extremely the trunk line, through on the trunk line divide the fluid to carry nutrient steam to each restore in the branch pipeline, through the gas pocket is to each the nutritive substance is carried to the native microorganism in the contaminated soil of restoration well to improve the restoration rate that well low pollution district passes through microbial remediation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a gas thermal desorption coupling bioremediation-based soil remediation system of the invention.
Fig. 2 is a schematic view showing a coupling structure of the components installed on the ground according to the present invention.
Fig. 3 is an enlarged view of a portion of the structure of fig. 2 a according to the present invention.
Figure 4 is a rear view of the components of the invention installed on the ground.
Fig. 5 is a sectional view of the internal structure of the line a-a of the present invention.
Fig. 6 is an enlarged view of a partial structure of fig. 5B according to the present invention.
Fig. 7 is a schematic structural view of the fixing ring of the present invention.
1-combustion blower, 2-combustor, 3-gas pipe, 4-heating pipe, 5-heating well, 6-nutrient medicament evaporation tank, 7-main pipe, 8-repair branch pipe, 9-repair well, 10-heat exchange wall, 11-flue gas collection box, 12-smoke exhaust pipe, 13-first communicating pipe, 14-heating plate, 15-branch fluid, 16-air hole, 17-fixing ring, 18-plate body, 19-cavity, 20-first arc plate, 21-second arc plate, 22-clamping plate, 23-connecting block, 24-air preheating pipe, 25-second communicating pipe, 26-heating arc plate, 27-throttling piece, 28-temperature sensor, 29-placing rack, 30-water storage tank, 31-a water pump, 32-a water collecting tank and 33-a spray header.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 7, the invention provides a soil remediation system based on gas thermal desorption coupling bioremediation, which includes a combustion blower 1, a burner 2, a gas pipe 3, a heating pipe 4, a heating well 5, a flue gas recovery device, a nutrient agent evaporation tank 6, a main pipe 7, a plurality of remediation branch pipes 8 and a plurality of remediation wells 9, wherein one end of the burner 2 is connected with the combustion blower 1 through a pipe, the other end of the burner 2 is connected with the gas pipe 3 through a pipe, the gas pipe 3 is arranged on the burner 2, a heat exchange wall 10 is arranged on the inner wall of the heating well 5, the heating pipe 4 is positioned in the heat exchange wall 10, and the flue gas recovery device is arranged above the heating well 5;
the flue gas recovery device comprises a flue gas collecting box 11, a smoke exhaust pipe 12, a first communicating pipe 13 and a heating plate 14, wherein the flue gas collecting box 11 is positioned above the heating well 5, the smoke exhaust pipe 12 is arranged on the flue gas collecting box 11, the first communicating pipe 13 is arranged on the smoke exhaust pipe 12, the heating plate 14 is detachably connected with the first communicating pipe 13 and is positioned at one end of the first communicating pipe 13 far away from the smoke exhaust pipe 12, the nutrient solution evaporation box 6 is detachably connected with the heating plate 14 and is positioned at one end of the heating plate 14 far away from the first communicating pipe 13, the nutrient solution evaporation box 6 is provided with the main pipeline 7, one end of the main pipeline 7 far away from the nutrient solution evaporation box 6 is provided with a splitter 15, the splitter 15 is provided with a plurality of repairing sub-pipelines 8, and each repairing sub-pipeline 8 is respectively positioned in the corresponding repairing well 9, each repair branch pipe 8 is provided with a plurality of air holes 16.
In the embodiment, air is sucked into the combustor 2 through the combustion blower 1, is fully mixed with the fuel gas discharged from the fuel gas pipe 3, and is ignited in the combustor 2, so that the combustion blower 1 continuously discharges high-temperature flue gas into the heating well 5 through the heating pipe 4, heat is transferred to polluted soil through the heat exchange wall 10, and thus polluted soil is repaired, the flue gas collection box 11 is located above the heating well 5, the flue gas collection box 11 is provided with the smoke discharge pipe 12, the smoke discharge pipe 12 is provided with the first communication pipe 13, the heating plate 14 is detachably connected with the first communication pipe 13 and is located at one end of the first communication pipe 13 far away from the smoke discharge pipe 12, and the nutritional agent evaporation box 6 is detachably connected with the heating plate 14, the nutrient solution evaporation box is characterized in that the nutrient solution evaporation box 6 is provided with a main pipeline 7, one end of the main pipeline 7, which is far away from the nutrient solution evaporation box 6, is provided with a branch fluid 15, the branch fluid 15 is provided with a plurality of repair branch pipelines 8, each repair branch pipeline 8 is respectively positioned in the corresponding repair well 9, each repair branch pipeline 8 is provided with a plurality of air holes 16, high-temperature flue gas exhausted from the heating well 5 is collected through the flue gas collection box 11, the high-temperature flue gas is conveyed to the heating plate 14 through the first communication pipe 13 on the smoke exhaust pipe 12, nutrient mixed liquid in the nutrient solution evaporation box 6 is heated and evaporated into steam, the steam is conveyed to the main pipeline 7, and the nutrient steam is conveyed to each repair branch pipeline 8 through the branch fluid 15 on the main pipeline 7, and (3) delivering nutrient substances to the native microorganisms in the polluted soil of each remediation well 9 through the air holes 16, so that the remediation rate of the middle and low-level polluted area through microorganism remediation is improved.
Further, hot plate 14 is including solid fixed ring 17 and plate body 18, gu fixed ring 17 with first intercommunication pipe 13 can dismantle the connection, and be located first intercommunication pipe 13's outside, plate body 18 with gu fixed ring 17 block is connected, and is located gu fixed ring 17's top, be provided with cavity 19 on the plate body 18, cavity 19 with first intercommunication pipe 13's the mouth of pipe is corresponding, be provided with a plurality of through-holes on the cavity 19.
In this embodiment, fixed ring 17 with first communicating pipe 13 can be dismantled and be connected, plate body 18 with fixed ring 17 block is connected, thereby will hot plate 14 is fixed first communicating pipe 13 is kept away from the one end of discharging fume pipe 12, high temperature flue gas in first communicating pipe 13 passes through a plurality of in the cavity 19 gas pocket 16, it is right on hot plate 14 nutrient solution evaporation case 6 heats.
Further, the fixing ring 17 includes a first arc-shaped plate 20, a second arc-shaped plate 21, a clamping plate 22 and a connecting block 23, a clamping groove is further formed in the plate 18, the clamping plate 22 is arranged on the first arc-shaped plate 20 and the second arc-shaped plate 21, the clamping plate 22 is matched with the clamping groove, the connecting block 23 is arranged at each of two ends of the first arc-shaped plate 20 and the second arc-shaped plate 21, and the connecting block 23 on the first arc-shaped plate 20 is connected with the connecting block 23 on the second arc-shaped plate 21 through a bolt.
In this embodiment, the clamping plates 22 of the first arc-shaped plate 20 and the second arc-shaped plate 21 are placed in the clamping grooves, so that the fixing rings 17 are clamped and connected with the plate body 18, and simultaneously the bolts on the connecting blocks 23 are tightened, so that the heating plate 14 is fixed on the first communication pipe 13.
Further, the soil remediation system based on gas thermal desorption coupling bioremediation further comprises an air preheating pipe 24, wherein the air preheating pipe 24 is connected with the combustion blower 1 through a pipeline and is located at one end, far away from the combustor 2, of the combustion blower 1.
In the present embodiment, the air preheating pipe 24 preheats the air sucked by the combustion blower 1 preliminarily, so that the combustion effect is improved, and the combustion chamber in the combustor 2 can reach a higher temperature.
Further, a second communicating pipe 25 is further arranged on the smoke exhaust pipe 12, a heating arc plate 26 is arranged on the second communicating pipe 25, and the heating arc plate 26 corresponds to the air preheating pipe 24.
In the present embodiment, a part of the high temperature flue gas in the smoke exhaust pipe 12 is conveyed to the air preheating pipe 24 through the second communicating pipe 25, and the air preheating pipe 24 is heated by the heating arc plate 26.
Further, two throttling pieces 27 are further arranged inside the smoke exhaust pipe 12, and each throttling piece 27 corresponds to the first communicating pipe 13 and the second communicating pipe 25 respectively.
In the present embodiment, when the flue gas is conveyed to the throttle 27, more high-temperature flue gas is conveyed into the first communicating pipe 13 and the second communicating pipe 25 respectively due to the influence of the pressure difference.
Further, soil repair system based on gas thermal desorption coupling bioremediation still includes temperature regulation and control device, temperature regulation and control device includes temperature sensor 28, rack 29 and spray set, be provided with on trunk line 7 temperature sensor 28, be provided with on the rack 29 spray set, spray set with trunk line 7 is corresponding.
In this embodiment, through temperature sensor 28 real-time supervision steam temperature in the trunk line 7, when steam temperature was too high, it was right to pass through spray set trunk line 7 cools down to the native microorganism in the low-grade contaminated soil of avoiding appears the deactivation phenomenon under high temperature steam.
Further, the spray device comprises a water storage tank 30, a water pump 31, a water collection tank 32 and spray heads 33, one end of the water pump 31 is connected with the water storage tank 30 through a pipeline, the other end of the water pump 31 is connected with the water collection tank 32 through a pipeline, the water collection tank 32 is detachably connected with the placing frame 29 and is located above the main pipeline 7, and the spray heads 33 are arranged at the bottom of the water collection tank 32 in a plurality.
In this embodiment, the water in the reservoir 30 is pumped into the water collecting tank 32 through the water pump 31, and the plurality of spray headers 33 on the water collecting tank 32 continuously spray cold water on the outer wall of the main pipeline 7, so that the temperature of the nutrient agent steam in the main pipeline is reduced, and the inactivation of native microorganisms in the low-medium-level polluted soil under high-temperature steam is avoided, so that the repairing effect is not ideal.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A soil remediation system based on gas thermal desorption coupling bioremediation is characterized in that,
the device comprises a combustion blower, a burner, a gas pipe, a heating well, a flue gas recovery device, a nutrient agent evaporation box, a main pipeline, a plurality of repair branch pipelines and a plurality of repair wells, wherein one end of the burner is connected with the combustion blower pipeline, the other end of the burner is connected with the gas pipe pipeline, the gas pipe is arranged on the burner, a heat exchange wall is arranged on the inner wall of the heating well, the heating pipe is positioned in the heat exchange wall, and the flue gas recovery device is arranged above the heating well;
the flue gas recovery device comprises a flue gas collecting box, a smoke exhaust pipe, a first communicating pipe and a heating plate, wherein the flue gas collecting box is positioned above the heating well, the smoke discharge pipe is arranged on the smoke collection box, the first communicating pipe is arranged on the smoke discharge pipe, the heating plate is detachably connected with the first communicating pipe, and is positioned at one end of the first communicating pipe far away from the smoke exhaust pipe, the nutrient medicament evaporation box is detachably connected with the heating plate, and is positioned at one end of the heating plate far away from the first communicating pipe, the main pipeline is arranged on the nutrient medicament evaporation box, the trunk line is kept away from the one end of nutrition medicament evaporating box is provided with the reposition of redundant personnel, be provided with a plurality ofly on the reposition of redundant personnel restore the branch pipeline, every restore the branch pipeline and be located the correspondence respectively in the restoration well, every restore and all be provided with a plurality of gas pockets on the branch pipeline.
2. The gas thermal desorption coupling bioremediation based soil remediation system of claim 1,
the hot plate is including solid fixed ring and plate body, gu fixed ring with first communicating pipe can dismantle the connection, and is located the outside of first communicating pipe, the plate body with gu fixed ring block is connected, and is located gu fixed ring's top, be provided with the cavity on the plate body, the cavity with the mouth of pipe of first communicating pipe is corresponding, be provided with a plurality of through-holes on the cavity.
3. The gas thermal desorption coupling bioremediation based soil remediation system of claim 2,
the fixing ring comprises a first arc-shaped plate, a second arc-shaped plate, a clamping plate and a connecting block, wherein a clamping groove is further formed in the plate body, the clamping plate is arranged on the first arc-shaped plate and the second arc-shaped plate, the clamping plate is matched with the clamping groove, the connecting block is arranged at each of two ends of the first arc-shaped plate and the second arc-shaped plate, and the connecting block on the first arc-shaped plate is connected with the connecting block on the second arc-shaped plate through a bolt.
4. The gas thermal desorption coupling bioremediation based soil remediation system of claim 3,
the soil remediation system based on gas thermal desorption coupling bioremediation further comprises an air preheating pipe, wherein the air preheating pipe is connected with the combustion air blower through a pipeline and is positioned at one end, far away from the combustor, of the combustion air blower.
5. The gas thermal desorption coupling bioremediation based soil remediation system of claim 4,
the smoke exhaust pipe is also provided with a second communicating pipe, the second communicating pipe is provided with a heating arc plate, and the heating arc plate corresponds to the air preheating pipe.
6. The gas thermal desorption coupling bioremediation based soil remediation system of claim 5,
two throttling pieces are further arranged inside the smoke exhaust pipe, and each throttling piece corresponds to the first communicating pipe and the second communicating pipe respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444029.0A CN112705565A (en) | 2020-12-08 | 2020-12-08 | Soil remediation system based on gas thermal desorption coupling bioremediation |
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| CN202011444029.0A CN112705565A (en) | 2020-12-08 | 2020-12-08 | Soil remediation system based on gas thermal desorption coupling bioremediation |
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Application publication date: 20210427 |