CN220453663U - Combustion device for in-situ thermal desorption of soil - Google Patents
Combustion device for in-situ thermal desorption of soil Download PDFInfo
- Publication number
- CN220453663U CN220453663U CN202321803235.5U CN202321803235U CN220453663U CN 220453663 U CN220453663 U CN 220453663U CN 202321803235 U CN202321803235 U CN 202321803235U CN 220453663 U CN220453663 U CN 220453663U
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- burner
- heating well
- flange
- thermal desorption
- heating
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 33
- 239000002689 soil Substances 0.000 title claims abstract description 33
- 238000003795 desorption Methods 0.000 title claims abstract description 26
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 89
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims description 13
- 239000002912 waste gas Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 abstract description 41
- 239000002737 fuel gas Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005485 electric heating Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a combustion device for in-situ thermal desorption of soil, which comprises a controller, a burner and a heating well, wherein a gas outlet of the controller is in sealing connection with a gas interface of the burner, a primary air inlet is arranged on the burner, a flame outlet end of the burner is connected with a flame inlet at the top end of the burner, a secondary air inlet is arranged on the side wall of the burner, the heating well comprises an inner heating well pipe and an outer heating well pipe, the inner heating well pipe is arranged in the outer heating well pipe, an air inlet at the top end of the inner heating well pipe is opposite to an air outlet in the middle of a connecting flange at the lower end of the burner, a lower flange and an upper flange are in sealing connection with the connecting flange at the lower end of the burner, an opening is arranged at the lower end of the inner heating well pipe, and a smoke outlet is arranged on the side wall at the upper part of the outer heating well pipe. The utility model has higher energy efficiency, can guide the polluted gas separated from the soil into the burner for combustion treatment, reduces the consumption of fuel gas and simplifies the recovery treatment procedure of the polluted gas.
Description
Technical Field
The utility model relates to the field of in-situ thermal desorption combustion equipment for soil, in particular to a combustion device for in-situ thermal desorption of soil.
Background
The in-situ thermal desorption is a soil pollution treatment method which is carried out in situ on a pollution site, the operation such as excavation is not needed, the pollution soil and/or underground water is heated to be close to or even exceed the boiling point of target pollutants in a direct or indirect heating mode, the target pollutants are selectively promoted to be desorbed, gasified, volatilized and decomposed or the fluidity of the target pollutants is increased by controlling the temperature and the high-temperature duration time of the system, the target pollutants are separated from soil media, and then the pollutants are pumped out of the soil through an extraction well, so that the aim of treating the pollutants in the soil is fulfilled.
The combustion device in the in-situ thermal desorption treatment system is a device for generating high-temperature gas and heating soil. In the prior art, a combustion device generates high-temperature gas in an electric heating manner, and generates high-temperature gas in a gas combustion manner, for example, a patent document with publication number of CN218361286U discloses an in-situ thermal desorption heating device for repairing soil pollution, which comprises a heating pipe, a heating element and a controller, wherein the heating element is electrically connected with the controller, heat generated by heating is injected into the heating pipe, the heating pipe comprises a heating inner pipe and a heating outer pipe, the heating inner pipe is sleeved in the heating outer pipe, and an air flow channel is formed between the heating inner pipe and the heating outer pipe; the two ends of the heating outer tube are closed, the lower end of the heating inner tube is opened, and the opening end of the heating inner tube extends to be close to the bottom of the heating outer tube; the heating element is an electric heating element and is arranged on the inner side of the upper end of the heating inner tube; the device is also provided with a blower which is connected with the upper end of the heating inner pipe; the air flow generated by the air blower conveys the heat generated by the heating element from top to bottom along the heating inner pipe and from bottom to top along the air flow channel, and returns to the upper end of the heating inner pipe to form a circulation. The scheme adopts an electric heating mode to generate hot air flow, the hot air flow is conveyed into the heating inner pipe through the air feeder, and the surrounding soil is heated through the air flow channel between the heating inner pipe and the heating outer pipe. And secondly, the pollutants in the soil are heated by adopting an electric heating mode, and the generated organic gas needs to be subjected to a complex treatment recovery procedure, so that the treatment cost of in-situ thermal desorption of the soil is increased.
Disclosure of Invention
The utility model aims to solve the problems of the existing extraction well in the background art and provides a combustion device for in-situ thermal desorption of soil.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a burner for soil normal position thermal desorption, which comprises a controller, the burner tip, combustor and heating well, be equipped with the gas entry and the gas outlet of connecting the burner tip of being connected with the gas pipeline on the controller, the gas outlet of controller and the gas interface sealing connection of burner tip, be equipped with primary air entry on the burner tip, the flame exit end of burner tip and the flame access connection on combustor top, be equipped with the overgrate air entry on the lateral wall of combustor, the heating well includes heating well inner tube and heating well outer tube, the heating well inner tube sets up in the heating well outer tube, the top of heating well inner tube is equipped with the flange, the top of heating well outer tube is equipped with the lower flange, the upper flange sets up in the flange top down, the air inlet on heating well inner tube top is just right with the gas outlet of the flange middle part of combustor lower extreme, and lower flange, upper flange and the flange sealing connection of combustor lower extreme, the upper portion of heating well outer tube extends to above the ground, be equipped with the exhaust vent on the lateral wall of the upper portion of heating well outer tube.
In the scheme, the side wall of the combustor is also provided with an extraction waste gas backfire inlet, and a gate valve is arranged at the extraction waste gas backfire inlet. Through setting up extraction waste gas flashback entry, can get into the combustor with the polluted gas that soil thermal desorption produced through pipeline and extraction waste gas flashback entry, in the combustor combustion, produce heat to reduce the consumption of gas, can reduce the processing cost of polluted gas simultaneously.
In the above scheme, the bottom of combustor is equipped with flange, and flange's middle part is equipped with the recess portion, and the shape of this recess portion corresponds with the upper flange on heating well inner tube top. Through setting up flange, be convenient for the connection of combustor and heating well, through setting up the recess portion, can make the high temperature gas that produces in the combustor directly get into in the heating well inner tube to guarantee flange and the sealing connection of the flange on heating well inner tube top and the lower flange at heating well outer tube top.
In the scheme, a thermocouple is arranged on the side wall of the combustor and is connected with the controller in an electric signal mode. The thermocouple is arranged to detect the temperature of the gas in the burner and feed the detection result back to the controller so as to carry out corresponding adjustment operation.
In the above scheme, the primary air inlet, the secondary air inlet and the smoke outlet are respectively provided with gate valves. Through setting up the gate valve, can adjust the air velocity of primary air, overgrate air and exhaust port, make the air velocity optimization of primary air, overgrate air and exhaust port adjust.
In the scheme, an ignition key, an ignition indication key, a fault reset key, a fault alarm key, a temperature control meter key and an emergency stop key are arranged on the control box. By arranging the operation keys, the combustion state of the burner is convenient to adjust.
The utility model has the positive effects that: compared with an electric heating mode, the combustion device for the in-situ thermal desorption of the soil can conduct heat in a mode of gas combustion, can save energy loss in a thermal power generation process, has higher energy efficiency, conducts heat in a mode of gas combustion, can introduce polluted gas separated from the soil into a combustor for combustion treatment, can utilize the polluted gas to obtain waste, reduces the consumption of the gas, and simplifies the recovery treatment procedure of the polluted gas.
Drawings
Fig. 1 is a schematic structural diagram of a combustion device for in-situ thermal desorption of soil.
The reference numerals in the figures are: the device comprises a controller 1, a burner 2, a primary air inlet 21, a burner 3, a secondary air inlet 31, a thermocouple 32, an extraction waste gas backfire inlet 33, a connecting flange 34, a heating well 4, a heating well outer pipe 41, a lower flange 411, a heating well inner pipe 42, an upper flange 421, a smoke outlet 43 and a gate valve 5.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described by means of examples, and it is obvious that the described examples are only some, but not all, examples of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
A combustion device for in-situ thermal desorption of soil as shown in fig. 1 comprises a controller 1, a burner tip 2, a burner 3 and a heating well 4.
The controller 1 is used for adjusting and controlling the combustion state of the combustor 3. The controller 1 is provided with operation keys for ignition, ignition indication, fault reset, fault alarm, temperature control meter, emergency stop and the like. By arranging the operation keys, the combustion state of the burner is convenient to adjust. The controller 1 is provided with a gas inlet connected with a gas pipeline and a gas outlet connected with the burner 2, and a control valve for controlling the flow rate of the gas is arranged in the controller 1, so that the speed of the gas conveyed to the burner 2 can be controlled through the control valve.
The burner 2 is a gas burning nozzle, the burner 2 can adopt the existing burner, an igniter is arranged in the burner 2, a gas outlet of the controller 1 is in sealing connection with a gas interface of the burner 2, a primary air inlet 21 is arranged on the burner 2, a gate valve 5 is arranged at the primary air inlet 21, and a flame outlet end of the burner 2 is connected with a flame inlet at the top end of the burner 3. The igniter is connected with an ignition key in the controller 1, when ignition is needed, the ignition key is pressed, the igniter can generate electric sparks to ignite fuel gas, after the ignition is successful, the temperature in the combustor can be detected through a thermocouple in the combustor 3, the detection result is fed back to a temperature control meter, and the temperature in the combustor 3 is displayed through the temperature control meter.
The burner 3 is a cylindrical member, the burner 3 is provided with a secondary air inlet 31, the secondary air inlet 31 is arranged on the upper side wall of the burner 3, the secondary air inlet 31 is provided with a gate valve 5, and the top end of the burner 3 is provided with a connecting flange 34 connected with the burner tip 2. A connecting flange 34 connected with the heating well 4 is arranged at the bottom of the burner 3, and a groove part is arranged in the middle of the connecting flange 34, and the shape of the groove part corresponds to the upper flange at the top end of the heating well inner pipe 42. By arranging the connecting flange 34, the connection between the burner 3 and the heating well 4 is facilitated, and by arranging the groove part, high-temperature gas generated in the burner 3 can directly enter the heating well inner pipe 42, and the sealing connection between the connecting flange 34 and the upper flange 421 at the top of the heating well inner pipe 42 and the sealing connection between the connecting flange 34 and the lower flange 411 at the top of the heating well outer pipe 41 are ensured.
A thermocouple 32 is provided on the side wall of the burner 3, the thermocouple 32 is provided on the lower side wall of the burner 3, and the thermocouple 32 is electrically connected with the controller 1. The temperature of the gas in the burner 3 can be detected by providing the thermocouple 32 and the detection result is fed back to the controller 1 so as to perform the corresponding adjustment operation.
The lower side wall of the burner 3 is also provided with an extraction waste gas backfire inlet 33, and the extraction waste gas backfire inlet 33 is provided with a gate valve 5. By arranging the extraction waste gas backfire inlet 33, the polluted gas generated by the thermal desorption of the soil can enter the combustor 3 through the pipeline and the extraction waste gas backfire inlet, and is combusted in the combustor 3 to generate heat, so that the consumption of fuel gas is reduced, and the treatment cost of the polluted gas can be reduced.
The heating well 4 is arranged in the soil which needs to be subjected to in-situ thermal desorption, the heating well 4 comprises an inner heating well pipe 42 and an outer heating well pipe 41, and the inner heating well pipe 42 and the outer heating well pipe 41 are cylindrical pipe fittings made of high-temperature-resistant steel pipes. The depth of the heating well 4 can be set according to the pollution depth, for example, the depth of the outer heating well pipe can be set to 6m, the outer diameter can be set to 1m, the inner heating well pipe is arranged in the outer heating well pipe, the depth of the inner heating well pipe can be set to 5.5m, the outer diameter can be set to 0.5m, the top end of the inner heating well pipe 42 is provided with an upper flange 421, the top of the outer heating well pipe 41 is provided with a lower flange 411, the upper flange 421 is arranged above the lower flange 411, the air inlet at the top end of the inner heating well pipe 42 is opposite to the air outlet in the middle of the connecting flange 34 at the lower end of the burner 3, the lower flange 411 and the upper flange 421 are in sealing connection with the connecting flange 34 at the lower end of the burner 3, the upper part of the outer heating well pipe 41 extends to above the ground, the side wall of the upper part of the outer heating well pipe 41 is provided with a smoke outlet 43, and the smoke outlet 43 is provided with a gate valve 5.
When the combustion device for in-situ thermal desorption of soil is used, fuel gas enters the controller from the fuel gas inlet, the fuel gas enters the burner tip from the fuel gas outlet, the ignition key on the controller triggers the igniter on the burner tip to ignite, after the ignition is successful, flame enters the combustor from the flame outlet end at the lower end of the burner tip, air is input from the secondary air inlet in the combustor, a fan can be connected at the secondary air inlet for conveniently adjusting the flow speed of the input secondary air, and the air speed is adjusted through the gate valve. When the combustion device works, the thermocouple in the combustor can detect the temperature in the combustor and feed back the temperature to the controller, and the temperature in the combustor is displayed through the temperature control meter. The burner is also provided with functional keys, and the working state of the burner can be adjusted through the functional keys, for example, the combustion of the fuel gas in the burner is controlled by adjusting the air flow speed of the fuel gas.
Compared with an electric heating mode, the combustion device for in-situ thermal desorption of soil adopts a fuel gas combustion mode to conduct heat, and compared with an electric heating mode, the combustion device for in-situ thermal desorption of soil can save energy loss in a thermal power generation process, has higher energy efficiency, and adopts a fuel gas combustion mode to conduct heat, so that polluted gas separated from soil can be introduced into a combustor for combustion treatment, waste utilization of the polluted gas can be achieved, the consumption of the fuel gas is reduced, and meanwhile, the recovery treatment procedure of the polluted gas is simplified.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A burner for soil normal position thermal desorption, its characterized in that: the heating well comprises a heating well inner pipe and a heating well outer pipe, the heating well inner pipe is arranged in the heating well outer pipe, an upper flange is arranged at the top of the heating well inner pipe, a lower flange is arranged at the top of the upper flange, an air inlet at the top of the heating well inner pipe is opposite to an air outlet at the middle part of a connecting flange at the lower end of the burner, the lower flange, the upper flange are in sealing connection with the connecting flange at the lower end of the burner, the upper part of the heating well outer pipe extends to the upper part of the ground, and a smoke outlet is arranged on the side wall of the upper part of the heating well outer pipe.
2. The combustion device for in-situ thermal desorption of soil according to claim 1, wherein: the side wall of the burner is also provided with an extraction waste gas backfire inlet, and a gate valve is arranged at the extraction waste gas backfire inlet.
3. The combustion device for in-situ thermal desorption of soil according to claim 1, wherein: the bottom of the burner is provided with a connecting flange, the middle part of the connecting flange is provided with a groove part, and the shape of the groove part corresponds to that of the upper flange at the top end of the inner tube of the heating well.
4. The combustion device for in-situ thermal desorption of soil according to claim 1, wherein: the side wall of the burner is provided with a thermocouple which is connected with the electric signal of the controller.
5. The combustion device for in-situ thermal desorption of soil according to claim 2, wherein: and the primary air inlet, the secondary air inlet and the smoke exhaust port are respectively provided with a gate valve.
6. The combustion device for in-situ thermal desorption of soil according to claim 1, wherein: the controller is provided with operation keys for ignition, ignition indication, fault reset, fault alarm, temperature control meter and emergency stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321803235.5U CN220453663U (en) | 2023-07-10 | 2023-07-10 | Combustion device for in-situ thermal desorption of soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321803235.5U CN220453663U (en) | 2023-07-10 | 2023-07-10 | Combustion device for in-situ thermal desorption of soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220453663U true CN220453663U (en) | 2024-02-06 |
Family
ID=89726418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321803235.5U Active CN220453663U (en) | 2023-07-10 | 2023-07-10 | Combustion device for in-situ thermal desorption of soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220453663U (en) |
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2023
- 2023-07-10 CN CN202321803235.5U patent/CN220453663U/en active Active
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