CN220760542U - Combustion heat conduction in-situ thermal desorption heating system - Google Patents
Combustion heat conduction in-situ thermal desorption heating system Download PDFInfo
- Publication number
- CN220760542U CN220760542U CN202320580344.9U CN202320580344U CN220760542U CN 220760542 U CN220760542 U CN 220760542U CN 202320580344 U CN202320580344 U CN 202320580344U CN 220760542 U CN220760542 U CN 220760542U
- Authority
- CN
- China
- Prior art keywords
- pipe
- heating
- shaped
- heat conduction
- thermal desorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 136
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 34
- 238000003795 desorption Methods 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 28
- 239000002356 single layer Substances 0.000 claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 21
- 238000012806 monitoring device Methods 0.000 claims abstract description 4
- 239000000779 smoke Substances 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002957 persistent organic pollutant Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Air Supply (AREA)
Abstract
The utility model provides a combustion heat conduction in-situ thermal desorption heating system, which comprises square wave-shaped reciprocating turn-back single-layer heating pipes, a burner, tail end exhaust fans, matched connecting pipelines and monitoring devices, wherein the heating pipes are positioned under the ground, and the head ends and the tail ends of the adjacent heating pipes are reversely staggered to form a uniformly distributed heating pipe network; the heating pipe comprises a plurality of U-shaped universal pipe joints and an upper connecting pipe, the air inlet at the head end is connected with the burner, and the air outlet at the tail end is connected with the tail end exhaust fan in parallel; the high-temperature flue gas produced by the burner exchanges heat in the reciprocating turn-back flow of the heating pipe, so that the in-situ soil heating is realized. The utility model can improve the utilization efficiency of flue gas energy and reduce the configuration of the burner; the defect of insufficient applicability of the complex structure of the conventional double-layer sleeve is avoided; the defect of poor effect of heat conduction heating the top and the bottom of the traditional vertical shaft is overcome; the heating system is arranged in parallel opposite dislocation, so that uniform heating repair is realized.
Description
Technical Field
The utility model belongs to the technical field of environmental protection, and particularly relates to a combustion heat conduction in-situ thermal desorption heating system.
Background
Typical contaminants in soil and groundwater are organic contaminants including benzene based compounds, chlorinated hydrocarbons, petroleum hydrocarbons, pesticides, polycyclic aromatic hydrocarbons and polychlorinated biphenyls. The presence of these contaminants in soil and groundwater is a serious hazard to surrounding human health and environmental ecology. Therefore, the polluted soil and the pollutants in the underground water are required to be removed by reasonable restoration technical means, and the human health and ecological environment risks of the polluted site are effectively controlled. The in-situ thermal desorption technology is a process of heating organic pollutant components in soil to a high enough temperature by a direct or indirect heating mode to volatilize the organic pollutant components into gas and separate the volatilized organic pollutant components from the soil, and collecting or directly burning and cracking the volatilized organic pollutant components. Compared with other polluted soil restoration technologies, the thermal desorption technology has the advantages of wide pollutant treatment range, high treatment rate, reusability of restored soil and the like. The heating modes of in-situ thermal desorption comprise modes of heat conduction heating, resistance heating, steam enhanced extraction and the like, wherein the heat conduction heating also comprises modes of electric heating, combustion heating and the like. The combustion heat conduction heating mode is a mainstream heating mode in the current in-situ thermal desorption technology, and is widely applied to in-situ soil remediation engineering in China.
But the current combustion heat conduction heating system generally uses a double-layer sleeve as a heating well, and because of the limitation of the injection mode of the flue gas, the current thermal desorption system generally only can heat from the bottom, the temperature of the flue gas is gradually reduced from bottom to top, and the heating is uneven. Meanwhile, the existing thermal desorption system has higher exhaust gas temperature and low energy utilization rate, and the main flue gas recycling mode is to re-inject underground for secondary use, but the ground transmission energy loss is overlarge. Therefore, it is particularly necessary to develop an in-situ heat conduction heating system and a heating method which have high energy utilization efficiency and uniform heating.
Disclosure of Invention
Aiming at the problems of low energy utilization efficiency and uneven heating range of the in-situ thermal conduction thermal desorption system in the prior art, the utility model provides the combustion thermal conduction in-situ thermal desorption heating system and the application method thereof, so as to achieve the purposes of improving the energy utilization efficiency, realizing uniform heating and repairing and being more convenient for device installation and dismantling.
In order to achieve the above purpose, the utility model mainly adopts the following technical scheme:
a combustion heat transfer in-situ thermal desorption heating system, comprising: square wave shape reciprocating turn-back single-layer heating pipe, burner, tail end exhaust fan, matched connecting pipeline and monitoring device; the square wave-shaped reciprocating folding single-layer heating pipes are positioned under the ground, and the head ends and the tail ends of the adjacent parallel square wave-shaped reciprocating folding single-layer heating pipes are reversely staggered to form a uniformly distributed heating pipe network.
Further, the square wave-shaped reciprocating turn-back single-layer heating pipe comprises a plurality of U-shaped universal pipe joints and an upper layer connecting pipe, wherein the U-shaped universal pipe joints are connected in series through the upper layer connecting pipe; the air inlet at the head end of the square wave-shaped reciprocating turn-back single-layer heating pipe formed by series connection is connected with a burner pipeline, and the air outlet at the tail end is connected with the air inlet of the tail end exhaust fan after being connected in parallel through a flue gas exhaust pipeline.
Further, the air inlet of the tail end exhaust fan is connected with the parallel outlet of the smoke exhaust pipeline of the square wave-shaped reciprocating turn-back single-layer heating pipe, and the air outlet of the tail end exhaust fan is connected with the smoke exhaust pipe.
Further preferably, the tail end exhaust fan is a high temperature resistant exhaust fan, and the wind pressure and the wind quantity can be adjusted in a variable frequency mode.
Further, the U-shaped universal pipe joint consists of a bottom transverse pipe, a U-shaped arm pipe and a supporting rod; the U-shaped arm pipe is characterized in that the inlets and outlets at the top and the bottom of the U-shaped arm pipe are flange structures, the bottom of the U-shaped arm pipe is connected with the bottom transverse pipe through a flange, the tops of the U-shaped arm pipes are fixedly supported through supporting rods, and detachable supporting rod hanging rings are arranged in the middle of the supporting rods.
Further preferably, the bottom transverse tube and the U-shaped arm tube are stainless steel round tubes, and the inner diameters of the bottom transverse tube and the U-shaped arm tube are the same and are larger than 15cm.
The length of the U-shaped arm pipe is 2m, 4m or 6m, and the U-shaped arm pipes are connected according to the target repair depth, and the connection length is smaller than the repair contaminated soil thickness by 2m or more.
Further, two ends of the upper connecting pipe are provided with homodromous flange interfaces which are connected in series to the air inlet and the air outlet of the two U-shaped universal pipe joints.
Further, the two ends of the bottom transverse pipe are equidirectional flange interfaces, four steel plates are welded on the outer side of the bottom transverse pipe to form a vertical bidirectional V-shaped structure of the bottom transverse pipe, and the length of the bottom transverse pipe is identical to that of the supporting rod.
Further preferably, the upper layer connecting pipe length, the bottom transverse pipe length and the supporting rod length have standard specifications of 2m, 4m or 6m.
The further preferred scheme is that the number of the U-shaped universal pipe joints and the upper layer connecting pipes and the lengths of the upper layer connecting pipes and the bottom transverse pipe are determined according to the target temperature difference of the air inlet and the air outlet of the square wave-shaped reciprocating turn-back single-layer heating pipe, the lower temperature area far away from the burner can select the smaller lengths of the upper layer connecting pipes and the bottom transverse pipe, and the temperature of the air outlet is larger than the target heating temperature.
Further, the burner is arranged at the top of the air inlet of the first section of U-shaped universal pipe joint at the head end of the square wave-shaped reciprocating turn-back single-layer heating pipe.
The further preferable scheme is that the burner adopts a low-nitrogen type light oil burner or a natural gas burner, the power of the burner can be adjusted between 20 kW and 80kW, and the heating temperature requirements of heating pipes with different lengths are met.
Furthermore, a thread interface is arranged between the burner and the air inlet of the square wave-shaped reciprocating folding single-layer heating pipe and a matched connecting pipeline between the air outlet at the tail end of the square wave-shaped reciprocating folding single-layer heating pipe and the tail end exhaust fan, and a replaceable thermocouple temperature detection probe is arranged; the thermocouples are respectively of an N type and a K type. The square wave-shaped reciprocating turning-back single-layer heating pipe is provided with a smoke check valve at the air inlet and the air outlet, and the smoke flow of the parallel heating pipes is regulated through the air outlet check valve. The working parameters of the burner and the fan can be adjusted in a targeted manner through detecting the temperature of the inlet and outlet flue gas, so that the temperature is ensured to meet the repairing requirement. The flue gas check valve ensures that high-temperature flue gas flows more stably according to a preset flow direction, effectively prevents flue gas backflow after shutdown and cooling, and ensures that the temperature distribution of a heating area is more uniform.
The utility model has the following beneficial technical effects:
(1) According to the utility model, the high-temperature flue gas produced by the burner exchanges heat in the reciprocating turn-back flow of the underground heating pipe, so that the energy utilization efficiency of the high-temperature flue gas produced by the burner is improved, and the configuration requirement and energy consumption of the burner are reduced;
(2) According to the utility model, the defect of poor heating effect of the top and bottom of the traditional vertical shaft heat conduction is overcome by the structure of the underground square wave-shaped reciprocating foldback single-layer heating pipe, meanwhile, the heating depth can be deepened to 10m by mutually connecting arm pipes with standard specifications in series, and compared with the coverage depth range of an independent horizontal pipe heating well, the coverage depth range of the vertical shaft heating well is greatly improved, and the application range is wider; soil resistance is reduced through the bidirectional V-shaped structure, slotted hoisting is realized, construction difficulty of vertical heating and horizontal heating is reduced, and installation and dismantling are more convenient;
(3) The utility model realizes complementation of a high-temperature zone, a low-temperature zone, an upper layer and a bottom heating zone by parallel reverse dislocation planar arrangement of adjacent heating pipes, deflection of the heating pipes and opposite flow of high-temperature flue gas, and improves the effect of uniform temperature distribution by gradient distribution of a temperature field;
(4) According to the utility model, through the universal standardization of the heating well pipe, the recycling of the heating well pipe can be realized in the remediation of shallow contaminated soil within 10m, the length of the heating pipe can be freely combined and extended through the assembly of universal pipe joints, the heating pipe does not need to be independently manufactured according to the field characteristics, meanwhile, a short-specification upper-layer connecting pipe and a bottom transverse pipe can be selected at the low-temperature section of the heating pipe far away from the burner, the distance between the heating pipes can be freely adjusted, and the defect of insufficient applicability of the conventional double-layer sleeve complex structure is avoided;
(5) Compared with a ground secondary conduction heating system, the utility model reduces ground heat transfer pipelines and is safer in repairing construction sites.
Drawings
FIG. 1 is a schematic diagram of the composition and structure of a combustion heat conduction in-situ thermal desorption heating system according to the present utility model in a specific embodiment;
FIG. 2 is a schematic diagram of the components of a single set of square wave shaped reciprocating turn-back type single layer heating tubes in a specific embodiment in the combustion heat conduction in-situ thermal desorption heating system of the present utility model;
FIG. 3 is a schematic side view of a bottom cross tube of a U-shaped universal tube section in a combustion heat conduction in-situ thermal desorption heating system according to the present utility model in a specific embodiment;
FIG. 4 is a schematic diagram of a parallel reverse dislocation planar layout of the combustion heat conduction in-situ thermal desorption heating system according to the present utility model in a specific embodiment;
the figure shows: 1. square wave shape reciprocating turn-back single-layer heating pipe; 2. a burner; 3. a tail end exhaust fan; 4. a flue gas exhaust drum; 5. u-shaped universal pipe joint; 6. an upper layer connecting pipe; 7. a bottom transverse tube; 8. a U-shaped arm tube; 9. a support rod; 10. a connecting flange; 11. a supporting rod hanging ring; 12. a bottom transverse tube is of a vertical bidirectional V-shaped structure; 13. a thermocouple temperature detection probe; 14. a heating tube groove; 15. original polluted soil; 16. coarse quartz sand; 17. a flue gas one-way valve.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Referring to fig. 1-4, a combustion heat conduction in-situ thermal desorption heating system is provided, in this embodiment, the system mainly includes a square wave-shaped reciprocating turn-back single-layer heating pipe 1, a burner 2, an end exhaust fan 3, a matched connecting pipeline and a monitoring device, and adjacent heating pipes of 6 sets of square wave-shaped reciprocating turn-back single-layer heating pipes 1 arranged in parallel below the ground are arranged in a reverse dislocation manner to form a uniformly distributed heating pipe network. The square wave-shaped reciprocating folding single-layer heating pipe 1 comprises 3 sections of U-shaped universal pipe joints 5 and 2 upper layer connecting pipes 6, the U-shaped universal pipe joints 5 are connected in series through the upper layer connecting pipes 6, the air inlet at the head end of the square wave-shaped reciprocating folding single-layer heating pipe 1 formed by the series connection is connected with the burner 2 through a pipeline, and the tail end air outlet is connected to the tail end exhaust fan 3 after being connected in parallel through a flue gas exhaust pipeline. The U-shaped universal pipe joint 5 consists of a bottom transverse pipe 7, a U-shaped arm pipe 8 and a supporting rod 9. The bottom transverse tube 7 and the U-shaped arm tube 8 are stainless steel round tubes, and the inner diameter of the pipeline is 16cm. The top and bottom inlets and outlets of the U-shaped arm pipe 8 are flange structures, the length is 4m, and the target repair depth is 6m. The bottom of the U-shaped arm pipe 8 is connected with the bottom transverse pipe 7 through a flange, the tops of the U-shaped arm pipes 8 are fixedly supported through supporting rods 9, and detachable supporting rod hanging rings 11 are arranged in the middle of the supporting rods 9. The two ends of the bottom transverse pipe 7 are equidirectional flange interfaces, four steel plates are welded on the outer side of the bottom transverse pipe 7 to form a bottom transverse pipe up-down bidirectional V-shaped structure 12, and the lengths of the bottom transverse pipe 7 and the supporting rod 9 are 2m and 4 m. The length of the upper connecting pipe 6 is 2m, the two ends of the upper connecting pipe are connected with the same-direction flange interfaces in series to the air inlet and the air outlet of the two adjacent U-shaped universal pipe joints 5. The target heating temperature of the soil is 90 ℃, the temperature of the air inlet of the square wave-shaped reciprocating foldback single-layer heating pipe 1 is 1000 ℃, the temperature of the air outlet is 200 ℃, and the lengths of the bottom transverse pipe 7 and the supporting rod 9 of the low-temperature section after the first U-shaped universal pipe joint are shortened from 4m to 2m. The burner 2 is arranged at the top of the air inlet of the first section U-shaped universal pipe joint 5 at the head end of the square wave-shaped reciprocating turn-back single-layer heating pipe 1, a low-nitrogen light oil burner is adopted, and the power of the burner is adjustable between 20 kW and 80 kW. The tail end exhaust fan 3 is a high-temperature resistant exhaust fan, the wind pressure and the wind quantity can be adjusted in a variable frequency mode, the air inlet is connected to the parallel outlet of the smoke exhaust pipeline of the square-wave-shaped reciprocating turn-back single-layer heating pipe 1, and the air outlet is connected with the peripheral smoke exhaust barrel 4 through a pipeline. The device comprises a combustor 2, a square wave-shaped reciprocating turning-back single-layer heating pipe 1, a threaded interface arranged on a matched connecting pipeline between an air outlet at the tail end of the square wave-shaped reciprocating turning-back single-layer heating pipe 1 and an exhaust fan 3, a replaceable thermocouple temperature detection probe 13 arranged on the matched connecting pipeline, wherein the thermocouples are respectively of an N type and a K type, a flue gas one-way valve 17 is arranged at the inlet and the outlet of the heating pipe to regulate the flue gas flow, the flue gas is prevented from flowing back to burn the combustor, and the flue gas flow of the parallel heating pipe is regulated through the flue gas one-way valve at the air outlet.
The steps for carrying out in-situ heating and repairing of the polluted soil by using the heating system are described as follows:
step 1: based on the target heating temperature and the influence radius of the square wave shape reciprocating folding single-layer heating pipe 1, determining the length of a U-shaped arm pipe 8 (the length of the U-shaped arm pipe is 4m in the embodiment, and the length of the U-shaped arm pipe is smaller than the thickness of the repaired polluted soil by 2m, which is formed by a single 4 m-specification arm pipe), the specification of a bottom transverse pipe 7 (the length of the bottom transverse pipe is 2m and 4m in the embodiment) and the parallel interval of the square wave shape reciprocating folding single-layer heating pipe 1 (the parallel interval is 2m in the embodiment), and performing the structural assembly of the U-shaped universal pipe joint 5;
step 2: according to the repair depth and the parallel interval of the square wave-shaped reciprocating turning back single-layer heating pipe 1, a chain slot machine is used for forming a heating pipe slot 14; the width of the slot should be greater than 20cm, preferably 25cm; the grooving length is 14m, and the square wave shape reciprocally turns back the single-layer heating pipe span 12m; the axis deviation is not more than +/-5 cm; the grooving depth is 5m, the square wave shape reciprocating turning back single-layer heating pipe burial depth is 5m, and the heating repair depth is 6m; the space between adjacent grooves is 2m, and the parallel space between the square wave-shaped reciprocating turning single-layer heating pipes is 2m; adjacent parallel grooves are offset by a U-shaped universal pipe joint span of 4m;
step 3: the assembled U-shaped universal pipe joint 5 is hung into a groove by using a supporting rod hanging ring 11, the static force pressing target depth is fixed by 5m, the upper connecting pipes 6 are sequentially connected to form a square wave-shaped reciprocating turn-back single-layer heating pipe 1, the adjacent parallel square wave-shaped reciprocating turn-back single-layer heating pipes are offset by 4m, and original polluted soil 15 is backfilled in a heating pipe groove 14 to be fixed by 1m above the bottom transverse pipe 7;
step 4: the burner 2 is connected to the air inlet of the underground square wave-shaped reciprocating turn-back single-layer heating pipe 1, and is installed according to the principle that the head end and the tail end of the adjacent parallel heating pipes are reversed, the air outlet of the heating pipe is connected to a ground exhaust pipeline, the exhaust pipeline is connected to the tail end exhaust fan 3 in parallel, and the tightness of high-temperature flue gas is checked;
step 5: after all the sets of parallel heating systems are installed, coarse-grained quartz sand 16 is filled in the gaps in the groove to serve as a heat conduction material, a foam cement heat insulation layer on the ground surface is paved, the power of the burner 2, the power of the tail end exhaust fan 3 and the smoke check valve 17 are regulated, the temperature of smoke at the outlet of the heating pipe is ensured to be higher than the target heating temperature, and the in-situ extraction treatment system is matched for repairing polluted soil;
step 6: after the repair is finished and the soil is cooled, the burner 2 and the tail end exhaust fan 3 are removed, the surface heat insulation layer is broken, the soil and quartz sand on the top layer of the groove are removed, the upper connecting pipe 6 is removed, the heating system is split into a U-shaped universal pipe joint 5, and the heating pipe is lifted to be removed for cleaning.
Claims (14)
1. A combustion heat transfer in-situ thermal desorption heating system, comprising: the device comprises a square wave-shaped reciprocating turning single-layer heating pipe (1), a burner (2), a tail end exhaust fan (3), a matched connecting pipeline and a monitoring device; the square wave-shaped reciprocating folding single-layer heating pipes (1) are positioned under the ground, and the head ends and the tail ends of the adjacent parallel square wave-shaped reciprocating folding single-layer heating pipes (1) are reversely staggered to form a uniformly distributed heating pipe network.
2. The combustion heat conduction in-situ thermal desorption heating system according to claim 1, wherein the square wave-shaped reciprocating turn-back single-layer heating pipe (1) comprises a plurality of U-shaped universal pipe joints (5) and an upper layer connecting pipe (6), and the U-shaped universal pipe joints (5) are connected in series through the upper layer connecting pipe (6); the air inlet at the head end of the square wave-shaped reciprocating turn-back single-layer heating pipe (1) formed by series connection is connected with a pipeline of the burner (2), and the air outlet at the tail end is connected with the air inlet of the tail end exhaust fan (3) after being connected in parallel through a flue gas exhaust pipeline.
3. The combustion heat conduction in-situ thermal desorption heating system according to claim 1, wherein an air inlet of the tail end exhaust fan (3) is connected with a smoke exhaust pipeline of the square wave-shaped reciprocating turn-back single-layer heating pipe (1) in parallel connection with an outlet, and an air outlet of the tail end exhaust fan (3) is connected with a smoke exhaust barrel (4) in a pipeline.
4. The combustion heat conduction in-situ thermal desorption heating system according to claim 2, wherein the U-shaped universal pipe joint (5) consists of a bottom transverse pipe (7), a U-shaped arm pipe (8) and a supporting rod (9); the inlet and outlet of U type arm pipe (8) top and bottom are flange structure, and U type arm pipe (8) bottom is through flange joint bottom violently pipe (7), through bracing piece (9) fixed stay between U type arm pipe (8) top, and there is detachable bracing piece rings (11) in bracing piece (9) middle part.
5. The combustion heat conduction in-situ thermal desorption heating system according to claim 2, wherein two ends of the upper connecting pipe (6) are connected in series to air inlets and air outlets of the two U-shaped universal pipe joints (5) through homodromous flange interfaces.
6. The combustion heat conduction in-situ thermal desorption heating system according to claim 4, wherein two ends of the bottom transverse tube (7) are connected with flanges in the same direction, four steel plates are welded on the outer side of the bottom transverse tube (7) to form a bottom transverse tube up-down bidirectional V-shaped structure (12), and the length of the bottom transverse tube (7) is the same as that of the supporting rod (9).
7. The combustion heat conduction in-situ thermal desorption heating system according to claim 1, wherein the burner (2) is arranged at the top of an air inlet of a first U-shaped universal pipe joint (5) at the head end of the square wave-shaped reciprocating turn-back single-layer heating pipe (1).
8. The combustion heat conduction in-situ thermal desorption heating system according to claim 4, wherein the bottom transverse tube (7) and the U-shaped arm tube (8) are stainless steel round tubes, and the inner diameters of the bottom transverse tube and the U-shaped arm tube are the same and are larger than 15cm.
9. The combustion heat conduction in-situ thermal desorption heating system according to claim 4, wherein the length of the U-shaped arm pipe (8) is 2m, 4m or 6m, and the single or a plurality of U-shaped arm pipes (8) are connected, and the connection length is smaller than the thickness of the restored polluted soil by 2m or more.
10. A combustion heat conduction in situ thermal desorption heating system according to claim 2, wherein the length of the upper layer connecting pipe (6) is 2m, 4m or 6m standard.
11. A combustion heat conduction in situ thermal desorption heating system according to claim 4, wherein the length of the bottom transverse tube (7) and the length of the support rod (9) have standard specifications of 2m, 4m or 6m.
12. The combustion heat conduction in-situ thermal desorption heating system according to claim 2 or 4, wherein the number of the U-shaped universal pipe joints (5) and the upper layer connecting pipes (6) and the lengths of the upper layer connecting pipes (6) and the bottom transverse pipes (7) are determined according to the target temperature difference of the air inlet and the air outlet of the square wave-shaped reciprocating turn-back single-layer heating pipe, the lower temperature section far away from the burner can select the upper layer connecting pipes (6) and the bottom transverse pipes (7) with shorter specification, and the air outlet temperature is higher than the target heating temperature.
13. A combustion heat conduction in-situ thermal desorption heating system according to claim 1, wherein the burner (2) is a low nitrogen type light oil burner or a natural gas burner, and the burner power can be adjusted between 20 kW and 80 kW.
14. A combustion heat conduction in-situ thermal desorption heating system according to claim 1, wherein the end exhaust fan (3) is a high temperature resistant exhaust fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320580344.9U CN220760542U (en) | 2023-03-22 | 2023-03-22 | Combustion heat conduction in-situ thermal desorption heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320580344.9U CN220760542U (en) | 2023-03-22 | 2023-03-22 | Combustion heat conduction in-situ thermal desorption heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220760542U true CN220760542U (en) | 2024-04-12 |
Family
ID=90615523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320580344.9U Active CN220760542U (en) | 2023-03-22 | 2023-03-22 | Combustion heat conduction in-situ thermal desorption heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220760542U (en) |
-
2023
- 2023-03-22 CN CN202320580344.9U patent/CN220760542U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109351766B (en) | Contaminated soil gas normal position thermal desorption repair system | |
| CN105834205A (en) | In-situ electric heating desorption restoration technology and device for contaminated site | |
| CN111250523B (en) | Gas thermal desorption heating well with longitudinal soil heated uniformly | |
| CN220760542U (en) | Combustion heat conduction in-situ thermal desorption heating system | |
| CN112974501A (en) | Energy optimization-based gas thermal desorption energy-saving structure and use method thereof | |
| CN215965481U (en) | Thermal desorption restoration backflash heating energy-saving system | |
| CN205079599U (en) | Cement rotary kiln barrel surface radiation heat reclaim unit | |
| CN110508604A (en) | Energy-efficient combustion gas thermal desorption equipment | |
| CN116274319A (en) | Combustion heat conduction in-situ thermal desorption heating system and application method thereof | |
| CN112642846A (en) | Heating well structure for in-situ gas thermal desorption technology | |
| CN205804102U (en) | A kind of vehicle-mounted heat-exchanger rig of Colophonium | |
| CN206600801U (en) | A kind of fractional combustion thermal-storage burning device utilizing radiant tube | |
| CN201945175U (en) | Multiple-effect integrated pipe type heating furnace | |
| CN203096564U (en) | Agitating pan for thermal regeneration of waste asphalt mixture | |
| CN105509083A (en) | Flue gas waste heat recovery system for gas thermal equipment | |
| CN113319114A (en) | In-situ thermal desorption device for repairing organic contaminated soil | |
| CN117259417A (en) | Heating system for in-situ thermal desorption | |
| CN103791618B (en) | A kind of oil field heat-conducting oil furnace | |
| CN113649405B (en) | Thermal desorption repair backfire heating economizer system | |
| CN202303410U (en) | Modified asphalt waste gas treatment apparatus | |
| CN202253631U (en) | Multiple-tube burner | |
| CN206953265U (en) | A kind of energy-saving and environmentally-friendly concrete component heats curing means | |
| CN202521840U (en) | Three-return-travel novel far infrared gas boiler | |
| CN2742340Y (en) | Sleeve heat transfer heating stove | |
| CN215543677U (en) | In-situ thermal desorption device for repairing organic contaminated soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |