CN212976286U - Rotary kiln type indirect heating combined heat storage tail gas incineration soil restoration device - Google Patents
Rotary kiln type indirect heating combined heat storage tail gas incineration soil restoration device Download PDFInfo
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Abstract
The utility model discloses a rotary kiln formula indirect heating unites heat accumulation tail gas and burns soil prosthetic devices, burn the unit, adsorb purification unit and evacuation unit including polluting soil pretreatment unit, weighing feeding unit, hot-blast furnace heat supply unit, rotary kiln formula indirect heat desorption unit, ejection of compact unit, tail gas dust removal unit, heat accumulation. The rotary kiln type indirect thermal desorption unit utilizes high-temperature flue gas generated by the hot blast stove to indirectly heat the polluted soil, so that the kiln body is uniformly heated while the high-temperature flame generated by the burner is prevented from ablating the rotary kiln body, and the efficient desorption of pollutants is ensured. The tail gas is subjected to three-stage dust removal through a thermal ceramic filter, a Venturi dust collector and a bag-type dust collector to realize the full removal of dust, and the heat storage incineration unit is connected with an active carbon adsorption unit in series to realize the thorough purification of tail gas pollutants. The utility model is suitable for a various organic pollutants soil remediation has that equipment operation is stable, the tail gas handling capacity is little, heat utilization rate is high and the thorough advantage of pollutant purification.
Description
Technical Field
The utility model belongs to the technical field of soil remediation, in particular to rotary kiln formula indirect heating unites heat accumulation tail gas and burns soil prosthetic devices, but wide application in organic matter contaminated soil dystopy is restoreed.
Background
With the acceleration of the urbanization process and the deepening of the adjustment of the industrial structure in China, a large number of chemical and pesticide enterprises are shut down or moved, organic pollution problems of petroleum hydrocarbon, polycyclic aromatic hydrocarbon and the like in the left field soil and underground water are exposed in the field redevelopment process, the safety of urban living environment and public health are seriously endangered, and the treatment and restoration work of the organic pollution field is urgently needed to be carried out.
At present, the heterotopic thermal desorption technology is one of the most widely applied technologies in soil remediation of organic contaminated sites, is suitable for various organic pollutants such as petroleum hydrocarbon, polycyclic aromatic hydrocarbon, polychlorinated biphenyl and the like, and has treatment effect and period meeting the requirements of cities on soil remediation. The thermal desorption technology is a technical process of heating organic matters in soil to a certain temperature by a direct or indirect heating mode, volatilizing the organic matters and separating the organic matters from the soil, and further purifying the organic matters by a tail gas treatment system. The indirect thermal desorption technology adopts an indirect heating mode, the polluted soil is not directly contacted with a heat source, and compared with a direct thermal desorption process, the load and the disposal cost of a tail gas treatment system can be effectively reduced.
China is in the initial stage of research and development of indirect thermal desorption repair technology, the existing indirect thermal desorption equipment mostly adopts spiral push type heating, the heat transfer is uneven, the handling capacity is low, the failure rate is high, and a burner is mostly arranged below a desorption kiln, high-temperature flame generated by the burner heats and contacts the desorption kiln body, the kiln body is affected by ablation, and the service life of the equipment is shortened. The tail gas treatment mostly adopts a condensation or active carbon adsorption mode, the purification capacity is limited, and the pollutants need to be further treated after being enriched, so that the aim of thoroughly eliminating the pollutants cannot be achieved. In addition, the tail gas treatment process partially adopts a direct combustion mode, so that the energy consumption is high and the explosion risk exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a rotary kiln formula indirect heating unites heat accumulation tail gas and burns soil prosthetic devices to the high temperature flame heating ablation kiln body that the solution combustor produced can not thoroughly eliminate tail gas pollution thing, and the energy consumption is high and has the technical problem of explosion risk.
The technical scheme is as follows:
the utility model provides a rotary kiln formula indirect heating unites heat accumulation tail gas and burns soil prosthetic devices, includes: pollute soil pretreatment unit, weigh feeding unit, hot-blast furnace heat supply unit, the indirect thermal desorption unit of rotation, ejection of compact unit, tail gas dust removal unit, heat accumulation burn unit, adsorb purification unit and evacuation unit, wherein:
the polluted soil pretreatment unit comprises a crushing and deironing device, a water content adjusting device and a soil screening hopper;
the weighing and feeding unit comprises a double-screw conveyor, an electronic belt scale, a closed belt conveyor, a feeding hopper and a first single-shaft screw conveyor;
the hot blast stove heat supply unit comprises a first burner, a hot blast stove and a high-temperature flue gas pipeline;
the rotary kiln type indirect thermal desorption unit is a double-layer sleeve type rotary indirect heating desorption kiln and comprises a rotary drum and an outer wall drum, wherein the rotary drum and the outer wall drum are concentric and coaxial, the axis of the rotary drum and the horizontal plane form an included angle of 1-3 degrees, the rotary drum and the outer wall drum are made of stainless steel, a heat insulation material is laid on the inner wall of the outer wall drum, and a T-shaped lifting blade is laid on the inner wall of the rotary drum;
the discharging unit comprises a single-shaft spiral humidifying conveyor and a closed annular stacker;
the tail gas dust removal unit comprises an air compressor, a hot ceramic filter, a Venturi dust remover, a bag-type dust remover and a second single-shaft screw conveyer;
the heat accumulation incineration unit comprises an LEL detector, a flame arrester, a heat accumulation type incinerator and a second combustor;
the adsorption purification unit comprises an alkali liquor tank, a wet washing tower, a demister and an active carbon adsorption tank;
the emptying unit comprises an induced draft fan and a chimney;
the discharge gate of broken deironing equipment is connected with the feed inlet of adjusting moisture content equipment, it is connected with soil screening fill feed inlet to adjust moisture content equipment discharge gate, soil screening fill discharge gate is connected with the double screw conveyer feed inlet, the double screw conveyer discharge gate is connected with airtight band conveyer feed inlet, the electronic belt weigher sets up in airtight band conveyer below, airtight band conveyer discharge gate is connected with the feeding hopper feed inlet, the feeding hopper discharge gate is connected with first unipolar screw conveyer feed inlet, first unipolar screw conveyer discharge gate is connected with rotary kiln formula indirect heating desorption kiln feed inlet, rotary kiln formula indirect heating desorption kiln discharge gate is connected with unipolar spiral humidification conveyer feed inlet, unipolar spiral humidification conveyer discharge gate is connected with airtight annular stacker feed inlet; the hot air outlet of the hot air furnace is connected with the air inlet of the rotary kiln type indirect heating desorption kiln, the air outlet of the rotary kiln type indirect heating desorption kiln is connected with the inlet of a hot ceramic filter, the outlet of the hot ceramic filter is respectively connected with the inlet of a Venturi dust collector and the inlet of a second single-shaft screw conveyer, the outlet of the Venturi dust collector is respectively connected with the inlet of a bag-type dust collector and the inlet of the second single-shaft screw conveyer, the outlet of the bag-type dust collector is respectively connected with the inlet of an LEL detector and the inlet of the second single-shaft screw conveyer, the inlet of the second single-shaft screw conveyer is connected with the inlet of the single-shaft screw humidifying conveyer, the outlet of the LEL detector is respectively connected with the inlet of a flame arrester and the inlet of a heat accumulating type incinerator, the outlet of the heat, the demister outlet is connected with the inlet of the activated carbon adsorption tank, the outlet of the activated carbon adsorption tank is connected with the draught fan, and the outlet of the draught fan is connected with the inlet of the chimney.
Furthermore, install water spraying equipment in the second unipolar spiral humidification conveyer, cooperate airtight annular stacker, carry out the humidification cooling and avoid the raise dust simultaneously to high temperature soil.
Further, the flame arrester is an explosion-proof type pipeline flame arrester, the shell is made of carbon steel, and the core of the flame arrester is made of 304L stainless steel material; the heat accumulating type incinerator is a rotary heat accumulating type incinerator, the operating temperature is higher than 760 ℃, and the maximum treatment air volume is 10000Nm3/h。
The beneficial effects of the utility model are embodied in:
1. the utility model discloses well contaminated soil is before getting into rotation indirect heating desorption kiln, through broken deironing equipment, soil screening fill, biax screw conveyer and unipolar screw conveyer's pretreatment in coordination, makes the moisture content that pollutes soil below 25%, and can guarantee that soil property is even and the particle diameter all below 40mm, improves its desorption effect of organic pollutant in rotation indirect heating desorption kiln.
2. The utility model discloses a form of indirect heating pollutes soil and heating heat source indirect contact not, compares in direct thermal desorption process, can reduce the tail gas handling capacity by a wide margin, effectively reduces tail gas processing system's load and deals with the cost. Meanwhile, the traditional thermal screw or hollow blade reactor type indirect thermal desorption equipment is low in heat transfer efficiency, serious in screw abrasion, high in failure rate of equipment parts and difficult to replace, and is limited by the structure of the thermal screw, so that the treatment capacity is low. The utility model discloses an indirect thermal desorption system of rotary kiln formula, the rotary drum inner wall is laid "gamma" shape lifting blade, can reduce the material adhesion on section of thick bamboo wall and bond into the piece, improves heat transfer, mass transfer effect between the gaseous solid phase in the rotary drum, lays high temperature flue gas air distribution plate between rotary drum and the outer wall section of thick bamboo, guarantees rotary drum outer wall thermally equivalent.
3. In the existing indirect heating rotary kiln equipment, a burner is mostly arranged below a rotary kiln, high-temperature flame generated by the burner directly heats the wall surface of the rotary kiln, and the local temperature of the flame generated by the burner can reach 1400-1700 ℃, so that the wall surface of the rotary kiln can be affected by ablation, the deformation of a kiln body is easily caused, the service life of the kiln body is greatly reduced, higher requirements are provided for the material of the kiln body, and the manufacturing cost is further increased. The utility model discloses a hot-blast furnace design, the high temperature flue gas that the natural gas burning produced and the air mixing back, through the high temperature flue gas air distributor uniform heating rotary drum body shell of rotary drum below, and then indirect heating pollutes soil, not only can reduce the high temperature flue gas to "ablation" of the kiln body, also can ensure the uniform heating of the kiln body, and long-term steady operation brings beneficial effect to the rotary kiln.
4. The utility model discloses dust removal unit has included hot ceramic filter, venturi dust remover and sack cleaner, and the series connection through the three is in coordination, can realize the abundant desorption of dirt particle in the tail gas, guarantees that tail gas reduces to 10mg Nm before entering heat accumulation formula burns burning furnace, and the dust content is reduced to 10mg Nm3Hereinafter, clogging of the regenerative incinerator is prevented. Meanwhile, an electric heating device is additionally arranged in the bag-type dust remover, the bag-type dust remover is maintained to operate at a temperature of more than 120 ℃, organic matters desorbed from the rotary kiln are prevented from being condensed in the bag-type dust remover, and organic pollutants can be ensured to enter a heat accumulating type incinerator in a gas phase state for high-temperature incineration disposal.
5. The existing indirect thermal desorption equipment mostly desorbs organic pollutants and then carries out condensation treatment, has limited purification capacity and condenses the organic pollutantsThe organic pollutants need further treatment after oil-water separation, and the pollutants cannot be completely eliminated in situ. The utility model discloses utilize regenerative incinerator direct incineration degradation tail gas in the pollutant, realized thoroughly eliminating of pollutant to pipeline before regenerative incinerator has set up the LEL detector, monitors organic pollutant's concentration in the tail gas, and pollutant concentration surpasses 8000mg/m in the tail gas3In order to reduce the explosion risk, the tail gas is directly introduced into the activated carbon adsorption tank through a bypass and is purified and then discharged after reaching the standard. Compared with a direct combustion treatment mode, the heat accumulating type incineration can greatly improve the heat energy utilization rate, reduce the fuel consumption and save the energy and the cost due to the working principle of heat accumulating and preheating.
Drawings
FIG. 1 is a schematic diagram of equipment connection of a rotary kiln type indirect heating and heat storage combined tail gas burning soil remediation device.
Description of reference numerals:
1-equipment for crushing and removing iron; 2-adjusting the water content equipment; 3-soil screening hopper; 4-a double screw conveyor; 5, sealing a belt conveyor; 6-electronic belt weigher; 7-feeding a hopper; 8-a first single-shaft screw conveyor; 9-a first burner; 10-hot blast stove; 11-rotary indirect heating desorption kiln; 12-single-shaft screw humidifying conveyor; 13-closed annular stacker; 14-an air compressor; 15-a thermal ceramic filter; 16-a venturi scrubber; 17-bag dust collector; 18-a second single-shaft screw conveyor; 19-an LEL detector; 20-flame arrestors; 21-regenerative incinerator; 22-a second burner; 23-a wet scrubber tower; 24-a lye tank; 25-a demister; 26-an activated carbon adsorption tank; 27-a draught fan; 28-chimney.
Detailed Description
In order to make those skilled in the art understand the technical solution of the present invention better, the following detailed description is given to the rotary kiln type indirect heating combined heat storage tail gas burning soil remediation device provided by the present invention with reference to the following embodiments. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the utility model provides a rotary kiln formula indirect heating jointly stores heat tail gas and burns soil prosthetic devices, include: the device comprises a contaminated soil pretreatment unit, a weighing and feeding unit, a hot blast stove heat supply unit, an indirect thermal desorption unit, a discharging unit, a tail gas dedusting unit, a heat storage incineration unit, an adsorption purification unit and an emptying unit.
The polluted soil pretreatment unit comprises a crushing and deironing device 1, a water content adjusting device 2 and a soil screening hopper 3. The weighing and feeding unit comprises a double-screw conveyor 4, a closed belt conveyor 5, an electronic belt scale 6, a feeding hopper 7 and a first single-shaft screw conveyor 8. The hot blast stove heating unit comprises a first burner 9 and a hot blast stove 10. The indirect thermal desorption unit is a rotary indirect heating desorption kiln 11. The discharging unit comprises a single-shaft spiral humidifying conveyor 12 and a closed annular stacker 13. The tail gas dust removal unit comprises an air compressor 14, a hot ceramic filter 15, a Venturi dust collector 16, a bag-type dust collector 17 and a second single-shaft screw conveyor 18. The regenerative incineration unit includes an LEL detector 19, a flame arrester 20, a regenerative incinerator 21, and a second burner 22. The adsorption purification unit comprises a wet washing tower 23, an alkali liquor tank 24, a demister 25 and an activated carbon adsorption tank 26. The evacuation unit comprises an induced draft fan 27 and a chimney 28.
The discharge gate of broken deironing equipment 1 is connected with the feed inlet of adjusting moisture content equipment 2, it is connected with 3 feed inlets of soil screening fill to adjust the 2 discharge gates of moisture content equipment, 3 discharge gates of soil screening fill are connected with 4 feed inlets of double screw conveyer, 4 discharge gates of double screw conveyer are connected with 5 feed inlets of airtight belt conveyer, electronic belt scale 6 sets up in airtight belt conveyer 5 below, 5 discharge gates of airtight belt conveyer are connected with 7 feed inlets of feeding hopper, 7 discharge gates of feeding hopper are connected with 8 feed inlets of first unipolar screw conveyer, 8 discharge gates of first unipolar screw conveyer are connected with 11 feed inlets of rotary kiln type indirect heating desorption kiln, 11 discharge gates of rotary kiln type indirect heating desorption kiln are connected with 12 feed inlets of unipolar spiral humidification conveyer, 12 discharge gates of unipolar spiral humidification conveyer are connected with 13 feed inlets of airtight annular stacker; the hot air outlet of the hot air furnace 10 is connected with the air inlet of the rotary kiln type indirect heating desorption kiln 11, the air outlet of the rotary kiln type indirect heating desorption kiln 11 is connected with the inlet of a hot ceramic filter 15, the outlet of the hot ceramic filter 15 is respectively connected with the inlet of a Venturi dust collector 16 and the inlet of a second single-shaft screw conveyor 18, the outlet of the Venturi dust collector 16 is respectively connected with the inlet of a bag-type dust collector 17 and the inlet of the second single-shaft screw conveyor 18, the outlet of the bag-type dust collector 17 is respectively connected with the inlet of an LEL detector 19 and the inlet of the second single-shaft screw conveyor 18, the inlet of the second single-shaft screw conveyor 18 is connected with the inlet of a single-shaft screw humidifying conveyor 12, the outlet of the LEL detector 19 is respectively connected with the inlet of a flame arrester 20 and the inlet of a demister 25, the outlet of, the outlet of the wet-type washing tower 23 is connected with the inlet of a demister 25, the outlet of the demister 25 is connected with the inlet of an active carbon adsorption tank 26, the outlet of the active carbon adsorption tank 26 is connected with an induced draft fan 27, and the outlet of the induced draft fan 27 is connected with the inlet of a chimney 28.
The utility model provides a soil prosthetic devices that rotary kiln formula indirect heating unites heat accumulation tail gas to burn when operation is worked, includes the following step:
1. firstly, a heating system of the rotary kiln is started: open first combustor 9, start hot-blast furnace 10, adjust hot-blast furnace 10 export flue gas temperature to about 900 ℃, then utilize the indirect thermal desorption kiln 11 rotary drum shell of high temperature flue gas heating that hot-blast furnace 10 produced, the high temperature flue gas air distribution plate that the rotary drum below was arranged can ensure rotary drum thermally equivalent, is used for this part high temperature flue gas of heating to evacuate after the active carbon adsorption, treats to reach in the rotary drum and sets for the temperature after, opens draught fan 27. The first burner 9 is a low-nitrogen burner, and the air supply quantity of the hot blast stove 10 can reach up to 20000 Nm3The highest blowing temperature can reach 900 ℃, and the power is 300 kW/h.
2. And then starting the heat accumulating type incinerator 21, opening the second combustor 22, preheating a heat accumulating layer of the heat accumulating type incinerator by using fresh air with small air volume, and introducing tail gas of a desorption system after the temperature reaches the required temperature. The tail gas of the desorption system is preheated in a heat storage chamber, then enters a combustion chamber to be heated to over 760 ℃, organic pollutants are oxidized into inorganic matters, and the high-temperature flue gas generated by oxidation heats the heat storage body for preheating the organic waste gas which enters subsequently.
3. After the polluted soil is subjected to pretreatment processes such as crushing, screening, water content regulation, iron removal and the like, the polluted soil is conveyed to a rotary indirect thermal desorption kiln 21 by a feeding metering system and is combined with a double-shaft screw conveying process and a single-shaft screw conveying process, so that the particle size of the polluted soil is below 40mm, the water content is less than 20%, and organic pollutants and water are desorbed in a rotary kiln and enter tail gas. The clean soil after removing the pollutants is sprayed and cooled by a single-shaft screw humidifying conveyor 12, and then stacked by a closed annular stacker 13 to be detected.
4. The desorption tail gas is firstly led into a dust removal unit, and the dust content in the tail gas is reduced to 10mg/Nm through the cooperative treatment process of a thermal ceramic filter 15, a Venturi dust remover 16 and a bag-type dust remover 173Hereinafter, the regenerative incinerator 21 is not clogged. And the removed dust particles are collected and transported to a discharging unit through a second single-shaft screw conveyer 1, and are stacked together with clean soil to be detected. A pulse airflow reverse soot blowing mode is adopted to timely and periodically remove filter cakes on the surfaces of the filter tubes so as to ensure that the hot ceramic filter 15 continuously and stably operates; the bag-type dust collector 17 is internally provided with an electric heating device to keep the bag-type dust collector to operate at a temperature of more than 120 ℃, so that organic matters in tail gas can be effectively prevented from being condensed in the bag-type dust collector, and organic pollutants can be ensured to enter the heat accumulating type incinerator 21 in a gas phase state for high-temperature incineration disposal. Meanwhile, a variable frequency air compressor 14 is utilized to provide air power for self-cleaning and ash removal of a thermal ceramic filter 15 and a bag-type dust remover 17, and the air displacement of the air compressor is 1m3Min, exhaust pressure 1Mpa, power 15 kW/h.
5. Guiding the tail gas after fully removing dust particles into a heat accumulation incineration unit for high-temperature oxidation, and installing a flame arrester on a high-temperature flue gas pipeline in front of the heat accumulation incinerator 21 to prevent high-temperature flame from entering a bag-type dust remover to burn out a bag; but when the LEL detector 19 detects a contaminant concentration in the exhaust gas higher than 8000mg/Nm3When the concentration of pollutants in the tail gas treated by the regenerative incinerator exceeds the maximum concentration limit of pollutants in the tail gas treated by the regenerative incinerator, the tail gas is subjected to moisture removal by a demister 25 and then is directly introduced into an activated carbon adsorption tank 26, and the tail gas is purified and then discharged after reaching the standardAnd the explosion risk is reduced.
6. And introducing the tail gas flowing out of the heat storage incineration unit into an adsorption purification unit for final treatment. The tail gas is first stripped of acidic materials in a wet scrubber 23 by means of lye spraying. If no acid gas is produced from the contaminants or intermediates in the tail gas, then the wet scrubber 23 may not be passed. The tail gas after deacidification treatment is introduced into a demister 25 to reduce the humidity, and then is introduced into an activated carbon adsorption tank 26 for final adsorption and purification, so that the tail gas is ensured to be discharged up to the standard. The shell of the wet washing tower 23 is made of 316L stainless steel, and is internally provided with an alkali liquor spraying device and a stepped ring packing; the shell of the activated carbon adsorption tank 26 is made of carbon steel, and an adsorption bed and honeycomb activated carbon are arranged in the tank.
7. The desorbed tail gas after dust removal, heat storage incineration, adsorption purification treatment is finally discharged through a chimney 28 by a draught fan 27.
The utility model discloses an indirect thermal desorption unit of rotary kiln formula utilizes the high temperature flue gas that the hot-blast furnace produced to carry out indirect heating to polluting soil, and the high temperature flame that not only can avoid the combustor to produce can also realize the kiln body thermally equivalent to "ablation" of the rotary kiln body, guarantees the high-efficient desorption of pollutant. The tail gas is subjected to three-level dust removal through a thermal ceramic filter, a Venturi dust collector and a bag-type dust collector to realize sufficient removal of dust, the heat storage incineration unit is connected with an active carbon adsorption unit in series to realize thorough purification of pollutants in the tail gas, and the heat storage incineration unit is suitable for repairing various organic matter contaminated soil and has the remarkable advantages of stable equipment operation, small tail gas treatment capacity, high heat energy utilization rate, thorough pollutant purification and the like.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art.
Claims (3)
1. The utility model provides a rotary kiln formula indirect heating unites heat accumulation tail gas and burns soil prosthetic devices which characterized in that includes: pollute soil pretreatment unit, weigh feeding unit, hot-blast furnace heat supply unit, the indirect thermal desorption unit of rotation, ejection of compact unit, tail gas dust removal unit, heat accumulation burn unit, adsorb purification unit and evacuation unit, wherein:
the polluted soil pretreatment unit comprises a crushing and deironing device, a water content adjusting device and a soil screening hopper;
the weighing and feeding unit comprises a double-screw conveyor, an electronic belt scale, a closed belt conveyor, a feeding hopper and a first single-shaft screw conveyor;
the hot blast stove heat supply unit comprises a first burner, a hot blast stove and a high-temperature flue gas pipeline;
the rotary kiln type indirect thermal desorption unit is a double-layer sleeve type rotary indirect heating desorption kiln and comprises a rotary drum and an outer wall drum, wherein the rotary drum and the outer wall drum are concentric and coaxial, the axis of the rotary drum and the horizontal plane form an included angle of 1-3 degrees, the rotary drum and the outer wall drum are made of stainless steel, a heat insulation material is laid on the inner wall of the outer wall drum, and a T-shaped lifting blade is laid on the inner wall of the rotary drum;
the discharging unit comprises a single-shaft spiral humidifying conveyor and a closed annular stacker;
the tail gas dust removal unit comprises an air compressor, a hot ceramic filter, a Venturi dust remover, a bag-type dust remover and a second single-shaft screw conveyer;
the heat accumulation incineration unit comprises an LEL detector, a flame arrester, a heat accumulation type incinerator and a second combustor;
the adsorption purification unit comprises an alkali liquor tank, a wet washing tower, a demister and an active carbon adsorption tank;
the emptying unit comprises an induced draft fan and a chimney;
the discharge gate of broken deironing equipment is connected with the feed inlet of adjusting moisture content equipment, it is connected with soil screening fill feed inlet to adjust moisture content equipment discharge gate, soil screening fill discharge gate is connected with the double screw conveyer feed inlet, the double screw conveyer discharge gate is connected with airtight band conveyer feed inlet, the electronic belt weigher sets up in airtight band conveyer below, airtight band conveyer discharge gate is connected with the feeding hopper feed inlet, the feeding hopper discharge gate is connected with first unipolar screw conveyer feed inlet, first unipolar screw conveyer discharge gate is connected with rotary kiln formula indirect heating desorption kiln feed inlet, rotary kiln formula indirect heating desorption kiln discharge gate is connected with unipolar spiral humidification conveyer feed inlet, unipolar spiral humidification conveyer discharge gate is connected with airtight annular stacker feed inlet; the hot air outlet of the hot air furnace is connected with the air inlet of the rotary kiln type indirect heating desorption kiln, the air outlet of the rotary kiln type indirect heating desorption kiln is connected with the inlet of a hot ceramic filter, the outlet of the hot ceramic filter is respectively connected with the inlet of a Venturi dust collector and the inlet of a second single-shaft screw conveyer, the outlet of the Venturi dust collector is respectively connected with the inlet of a bag-type dust collector and the inlet of the second single-shaft screw conveyer, the outlet of the bag-type dust collector is respectively connected with the inlet of an LEL detector and the inlet of the second single-shaft screw conveyer, the inlet of the second single-shaft screw conveyer is connected with the inlet of the single-shaft screw humidifying conveyer, the outlet of the LEL detector is respectively connected with the inlet of a flame arrester and the inlet of a heat accumulating type incinerator, the outlet of the heat, the demister outlet is connected with the inlet of the activated carbon adsorption tank, the outlet of the activated carbon adsorption tank is connected with the draught fan, and the outlet of the draught fan is connected with the inlet of the chimney.
2. The rotary kiln type indirect heating and heat storage combined tail gas incineration soil remediation device as claimed in claim 1, wherein a water spraying device is installed in the second single-shaft spiral humidifying conveyor, and a closed annular stacker is matched to humidify and cool high-temperature soil while dust raising is avoided.
3. The rotary kiln type indirect heating and heat storage combined tail gas incineration soil remediation device as claimed in claim 1 or 2, wherein the flame arrester is an explosion-proof type pipeline flame arrester, the shell is made of carbon steel, and the flame arrester core is made of 304L stainless steel; the heat accumulating type incinerator is a rotary heat accumulating type incinerator, the operating temperature is higher than 760 ℃, and the maximum treatment air volume is 10000Nm3/h。
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| CN202021755031.5U CN212976286U (en) | 2020-08-20 | 2020-08-20 | Rotary kiln type indirect heating combined heat storage tail gas incineration soil restoration device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275371A (en) * | 2021-05-25 | 2021-08-20 | 南京金乾盛建设工程有限公司 | Thermal desorption treatment process and repair device for organic contaminated soil |
| CN113384986A (en) * | 2021-06-30 | 2021-09-14 | 苏州麦腾环境科技有限公司 | Multistage forming machine tail gas filtration system |
| CN113732038A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil heat treatment system and process |
| CN114904903A (en) * | 2022-05-27 | 2022-08-16 | 江苏省环境科学研究院 | Quick emergency thermal desorption device for petroleum hydrocarbon leakage contaminated soil |
-
2020
- 2020-08-20 CN CN202021755031.5U patent/CN212976286U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275371A (en) * | 2021-05-25 | 2021-08-20 | 南京金乾盛建设工程有限公司 | Thermal desorption treatment process and repair device for organic contaminated soil |
| CN113275371B (en) * | 2021-05-25 | 2022-01-04 | 南京金乾盛建设工程有限公司 | Thermal desorption treatment process and repair device for organic contaminated soil |
| CN113384986A (en) * | 2021-06-30 | 2021-09-14 | 苏州麦腾环境科技有限公司 | Multistage forming machine tail gas filtration system |
| CN113732038A (en) * | 2021-09-13 | 2021-12-03 | 中冶节能环保有限责任公司 | Contaminated soil heat treatment system and process |
| CN114904903A (en) * | 2022-05-27 | 2022-08-16 | 江苏省环境科学研究院 | Quick emergency thermal desorption device for petroleum hydrocarbon leakage contaminated soil |
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