CN204234456U - Multi-stage oven soil repair system - Google Patents
Multi-stage oven soil repair system Download PDFInfo
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- CN204234456U CN204234456U CN201420711685.6U CN201420711685U CN204234456U CN 204234456 U CN204234456 U CN 204234456U CN 201420711685 U CN201420711685 U CN 201420711685U CN 204234456 U CN204234456 U CN 204234456U
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Abstract
The utility model relates to a kind of multi-stage oven soil repair system.Its objective is that a kind of structure is simple, cost is low in order to provide, the soil repair system of environmental pollution can not be caused.The utility model comprises multi-stage oven, heated sealed room and after-burner.Before entering heated sealed room, fragmentation, screening are carried out to soil, and send in multi-stage oven and carry out pyrolysis.The air inlet on after-burner top is communicated with the gas discharge outlet of heated sealed room with the pyrolysis gas outlet of multi-stage oven respectively, and the exhaust outlet of after-burner is connected with the air inlet of sack cleaner, and the gas outlet of sack cleaner is connected with the air inlet of desulfurizing tower.The exhaust outlet of desulfurizing tower is connected with the air inlet of cooling tower, the gas outlet of cooling tower is connected with the air inlet of gas concentration unit, the gas outlet of gas concentration unit is connected with the air inlet of active carbon adsorber, the gas outlet of active carbon adsorber is connected with smoke on-line monitoring system, and smoke on-line monitoring system carries out analysis to Exhaust Gas and detects rear external discharge up to standard.
Description
Technical field
The utility model relates to soil remediation field, particularly relates to a kind of multi-stage oven soil repair system.
Background technology
Along with the development of industrialization and urbanization, the problem of atmosphere pollution, water pollutions and soil pollution is day by day serious, and these pollutions bring very large impact to the healthy of people.For soil pollution: if containing excessive heavy metal in soil, the grain of planting in this soil and vegetables also can be subject to the pollution of heavy metal in soil, and being ingested in a large number by people enters after in body, can cause a variety of disease; In addition, containing more multiring aromatic hydrocarbon substance in PAHs contaminated soil, because polycyclic aromatic hydrocarbon is carcinogen, and carcinogenicity is very strong, and people live in for a long time in the environment of this soil and are easy to suffer from various disease, or even cancer.Therefore, the soil that contains polycyclic aromatic hydrocarbon had to pass through soil repair system and carries out repair process before external discharge present stage.
Thermal desorption technology is exactly one of reparation effective technology containing multiring aromatic hydrocarbon soil, thermal desorption technology adopts directly usually or the mode of indirect soil makes the harmful substance in soil exist with the form of gas in high temperature environments, and carries out absorption cleaning to pernicious gas.But there is a lot of shortcoming in existing repair system:
1, soil is being carried out in the process of pyrolysis, other thermal desorption stove can not control flexibly due to temperature, can not sufficient pyrolysis be carried out to soil, therefore not high to the clearance of the multiring aromatic hydrocarbon substance in soil, and many with the poisonous and harmful product generated.
2, other thermal desorption technology major parts all adopt burning process, and burning process needs a large amount of air-breathings, therefore cause needing the tail gas of environmental protection treatment many especially in the link of rear end, and energy consumption are very large.
3, other thermal desorption technology major parts all adopt burning disposal, can cause the sand of rehabilitating soil, and repair process is not thorough, and the reverse repair process of oneself of soil is interrupted.
Utility model content
The technical problems to be solved in the utility model is to provide that a kind of floor space is little, cost is low, can not cause the multi-stage oven soil repair system of environmental pollution.
The utility model multi-stage oven soil repair system, wherein: comprise multi-stage oven, heated sealed room, after-burner, desulfurizing tower, cooling tower and active carbon adsorber, heated sealed indoor are provided with heater, the gas discharge outlet of heated sealed room is connected with the air inlet of after-burner, the discharging opening of heated sealed room is connected with the material inlet of multi-stage oven, multi-stage oven comprises main body cover again, central shaft, siege, rake arms and drive motors, the inwall of main body cover is equipped with flame retardant coating, seal cover is respectively arranged with on the top of main body cover and bottom, central shaft is through the first cavity of main body cover inside, central shaft top is stretched out from the centre position on main body cover top, central shaft bottom is stretched out from the centre position of main body cover bottom, the driving shaft of drive motors is connected with the outer wall of central shaft bottom, the central shaft being positioned at the first cavity inside is evenly provided with 6 ~ 7 layers of sieve materials device along direction from top to bottom, every layer of sieve materials device comprises again connection annulus, rake arms, rake teeth and siege, connecting annulus is set on the outer wall of central shaft, the outer ledge place of each connection annulus is provided with at least one link, link is connected with one end of rake arms, the other end of rake arms is near the inwall of main body cover, the lower end of rake arms is provided with rake teeth, siege is provided with in the horizontal direction below rake teeth, siege outer ledge is connected with the inwall of main body cover, siege inside edge is near central shaft, the first material-dropping hole is provided with between siege inside edge and central shaft, each layer sieve materials device from top to bottom can be divided into again top to sieve materials device, middle part sieve materials device and bottom sieve materials device, the number of plies of top sieve materials device is 2 layers, the number of plies of middle part sieve materials device is 2 layers ~ 3 layers, the number of plies of bottom sieve materials device is 2 layers, the second material-dropping hole is offered at the outer ledge place of the siege being arranged in top sieve materials device and middle part sieve materials device odd-level, and the upper end at siege inside edge place is provided with convex tendon, the second material-dropping hole is offered at the outer ledge place of the lower floor's siege being arranged in bottom sieve materials device, the housing of main body cover side offers 6 ~ 7 passages, at each passage place, lambda sensor is installed, the housing of main body cover opposite side is provided with multiple igniter, main body cover top is provided with exhaust chimney, central shaft top is communicated with exhaust chimney, main body cover bottom is provided with Residue extraction pipeline, the pyrolysis gas outlet on multi-stage oven top is communicated with the air inlet of after-burner, the sidewall of after-burner offers natural gas air inlet and combustion air air inlet, igniter is connected with natural-gas transfer pipeline respectively with natural gas air inlet, passage is connected with combustion air blower fan respectively by gas pipeline with combustion air air inlet, the sidewall of after-burner is provided with lambda sensor, the exhaust outlet of after-burner is connected with the air inlet of sack cleaner, the gas outlet of sack cleaner is connected with the air inlet of desulfurizing tower, the exhaust outlet of desulfurizing tower is connected with the air inlet of cooling tower, the gas outlet of cooling tower is connected with the air inlet of active carbon adsorber, the gas outlet of active carbon adsorber is connected with exhaust chimney.
The utility model multi-stage oven soil repair system, wherein said multi-stage oven soil repair system also comprises crushing and screening device and bucket elevator, bucket elevator is arranged on heated sealed chamber interior, the discharging opening of crushing and screening device is connected with the feeding mouth of bucket elevator lower end, the discharging opening of bucket elevator upper end is connected with the charging aperture of feeding screw, feeding screw is arranged on the discharge outlet of heated sealed room, and the discharging opening of feeding screw is connected with the material inlet of multi-stage oven.
The utility model multi-stage oven soil repair system, wherein said crushing and screening device diameter that is soil particle is broken, screening is 0.1 ~ 1.5cm.
The utility model multi-stage oven soil repair system, wherein said heated sealed chamber interior temperature is 460 DEG C.
The utility model multi-stage oven soil repair system, also gas concentration unit is provided with between wherein said cooling tower and active carbon adsorber, the air inlet of gas concentration unit is connected with the gas outlet of cooling tower, and the gas outlet of gas concentration unit is connected with the air inlet of active carbon adsorber.
The utility model multi-stage oven soil repair system, wherein said central shaft is the tube-shaped structure that inside is provided with the second cavity, the hot gas outlet that the sidewall on central shaft top is offered is communicated with the medium position of inner first cavity of multi-stage oven, also arrange central shaft air-cooler in central shaft bottom, the air outlet of central shaft air-cooler is by the second cavity connects of pipeline and central shaft inside.
The utility model multi-stage oven soil repair system, the quantity of wherein said sieve materials device is 7 layers, ground floor and the second layer are top sieve materials device from top to bottom, third layer, 4th layer is middle part sieve materials device with layer 5, layer 6 and layer 7 are bottom sieve materials device, ground floor, third layer, the outer ledge place of the siege of layer 5 and layer 7 offers the second material-dropping hole, ground floor, the upper end at the siege inside edge place of third layer and layer 5 is provided with convex tendon, the quantity that the housing of main body cover side is offered passage is 7, each passage is vertically offered side by side, offering of each passage is corresponding with the setting height(from bottom) of each sieve materials device highly respectively, on the housing of main body cover opposite side, the quantity of mounting points firearm is 4, each igniter is vertically installed side by side, the firing tip of igniter is positioned at hull outside, the discharge end of igniter is positioned at enclosure interior.
The utility model multi-stage oven soil repair system, the setting height(from bottom) of wherein said 4 igniters lays respectively between sieve materials device ground floor and the second layer, between the second layer and third layer, between the 4th layer and layer 5, between layer 5 and layer 6.
The utility model multi-stage oven soil repair system, the temperature of wherein said top sieve materials device is 160 DEG C ~ 310 DEG C, and the temperature of middle part sieve materials device is 390 DEG C ~ 460 DEG C, and the temperature of bottom sieve materials device is 560 DEG C.
The utility model multi-stage oven soil repair system difference from prior art is: the utility model floor space is little, cost is low, can not cause environmental pollution.Before pyrolysis is carried out to the soil containing multiring aromatic hydrocarbon substance, soil is carried out sufficient fragmentation, screening, and the soil after broken, screening is transported in heated sealed room carries out high-temperature heating, the multiring aromatic hydrocarbon substance of volatilization is directly passed in after-burner and burns, after avoiding fragmentation, screening, the multiring aromatic hydrocarbon substance of volatilization directly enters in air, causes air pollution.Multi-stage oven is adopted to carry out pyrolysis to the soil containing multiring aromatic hydrocarbon substance, temperature controls flexibly, large quantity of air is not needed to carry out combustion-supporting, solid product and the second gaseous products is had to after pyrolysis, not containing multiring aromatic hydrocarbon substance in solid product, directly can stack in field at purification soil and stack, can not volatilize in oriented air pernicious gas.Second gaseous products is successively through after-burner, multiring aromatic hydrocarbon substance is all burnt, gas after burning successively through dedusting, sulphur removal, except soluble gas, the process such as to eliminate the unusual smell after the gas that finally obtains can reach discharge standard, and externally discharged by exhaust chimney, energy consumption is little, device structure is simple, cost is low, multiring aromatic hydrocarbon substance purification is thorough, has very high using value in soil remediation field.Multi-stage oven and after-burner all adopt Automated condtrol, and brakingization, intelligence degree are high.Poisonous and harmful substances in product is all decomposed and absorbs, and does not have unnecessary toxic gas externally to discharge in pyrolytic process, and peculiar smell is absorbed resident's normal life that can not affect surrounding, more can not cause secondary pollution to environment.And this multi-stage oven repair system adopts pyrolysis principle, can not cause the soil desertification after reparation, can not the reverse repair ability of spoiled soil.
Below in conjunction with accompanying drawing, the utility model multi-stage oven soil repair system is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model multi-stage oven soil repair system;
Fig. 2 is the front sectional view of multi-stage oven in the utility model multi-stage oven soil repair system.
Detailed description of the invention
As shown in Figure 1, for the structural representation of the utility model multi-stage oven soil repair system, comprise crushing and screening device 17, multi-stage oven 1 (also known as multiple hearth furnace), heated sealed room 2, after-burner 3, desulfurizing tower 8, cooling tower 4, gas concentration unit 5 and active carbon adsorber 6.Be provided with heater and bucket elevator 3 in heated sealed room 2, heater continuous heating ensures that the mean temperature in heated sealed room 2 is 460 DEG C, and top, heated sealed room 2 offers gas discharge outlet.The discharging opening of crushing and screening device 17 is connected with the feeding mouth of bucket elevator 3 lower end, the discharge outlet of heated sealed room 2 is provided with feeding screw 16, the discharging opening of bucket elevator 3 upper end is connected with the charging aperture of feeding screw 16 one end, the discharging opening of feeding screw 16 other end stretches out outside, heated sealed room 2 and is connected with the material inlet on multi-stage oven 1 top, soil containing polycyclic aromatic hydrocarbon carries out abundant pyrolysis in multi-stage oven 1, solid product after pyrolysis is discharged by the Residue extraction pipeline 35 of multi-stage oven 1 bottom, solid product is transported to purification soil stacking field 12 further to purify other harmful substances wherein contained.The hot gas outlet 37 on multi-stage oven 1 top is connected with therein by pipeline, unnecessary hot gas is transmitted back to multi-stage oven 1 inner.The air inlet on after-burner 3 top is communicated with the gas discharge outlet on top, heated sealed room 2 with the pyrolysis gas outlet on multi-stage oven 1 top respectively by pipeline, the sidewall of multi-stage oven 1 vertically offers multiple igniter 29 and multiple passage 31 side by side, the sidewall of after-burner 3 offers natural gas air inlet and combustion air air inlet, igniter 29 is connected with natural-gas transfer pipeline respectively with natural gas air inlet, passage 31 is connected with combustion air blower fan 15 respectively by gas pipeline with combustion air air inlet, the sidewall of after-burner 3 is provided with lambda sensor, the oxygen content passed in after-burner 3 in air can be detected.The exhaust outlet of after-burner 3 bottom is connected by the air inlet of pipeline with sack cleaner 7, the gas outlet of sack cleaner 7 is connected by the air inlet of pipeline with desulfurizing tower 8 lower end, be provided with cesspool 9 below desulfurizing tower 8, be used for processing the waste water of desulfurizing tower 8 inside.The exhaust outlet on desulfurizing tower 8 top is connected by the air inlet of pipeline with cooling tower 4 bottom, the gas outlet at cooling tower 4 top is connected by the air inlet of pipeline with gas concentration unit 5, the gas outlet of gas concentration unit 5 is connected by the air inlet of pipeline with active carbon adsorber 6, the gas outlet of active carbon adsorber 6 is connected with smoke on-line monitoring system, and smoke on-line monitoring system carries out externally being discharged by exhaust chimney 10 after analysis detection reaches discharge standard to Exhaust Gas.
As shown in Figure 2, be the front sectional view of multi-stage oven in the utility model multi-stage oven soil repair system, comprise main body cover 21, central shaft 22, siege 23, rake arms 24, drive motors 15 and central shaft air-cooler 14.The vertical placement that main body cover 21 is made for steel plate columnar structured, the inwall of main body cover 21 is equipped with flame retardant coating, is respectively arranged with seal cover on the top of main body cover 21 and bottom, main body cover 21 bottom is also provided with support 36.The central shaft 22 of tube-shaped structure is vertically provided with at the middle part of main body cover 21, central shaft 22 is through inside first cavity of main body cover 21, central shaft 22 top is stretched out from the centre position on main body cover 21 top, the sidewall on central shaft 22 top offers hot gas outlet 37, and hot gas outlet 37 is communicated with by the medium position of inner first cavity of pipeline and multi-stage oven 1.Central shaft 22 bottom is stretched out from the centre position of main body cover 21 bottom, central shaft 22 bottom is provided with drive motors 15 and central shaft air-cooler 14, the driving shaft of drive motors 15 is connected with the outer wall of central shaft 22 bottom, when drive motors 15 works, driving shaft can be with central shaft 22 to rotate, cooling air, by the second cavity connects of pipeline and central shaft 22 inside, is transported in the second cavity by the air outlet of central shaft air-cooler 14.The central shaft 22 being positioned at the first cavity inside is disposed with 6 ~ 7 layers of sieve materials device along direction from top to bottom, the number of plies of top sieve materials device is 2 layers, the number of plies of middle part sieve materials device is 2 layers ~ 3 layers, the number of plies of bottom sieve materials device is 2 layers, the present embodiment selects 7 layers to sieve materials device, top sieve materials device is ground floor and the second layer, and middle part sieve materials device is third layer, the 4th layer and layer 5, and bottom sieve materials device is layer 6 and layer 7.Every layer of sieve materials device comprises again and connects annulus 30, rake arms 24, rake teeth 25 and siege 23, to connect on outer wall that annulus 30 is set in central shaft 22 and can with central shaft 22 for axle rotates, four links are provided with uniformly at the outer ledge place of each connection annulus 30, each link is connected with one end of strip rake arms 24 respectively, the other end of rake arms 24 is near the inwall of main body cover 21, the rake teeth 25 of tooth-shape structure is arranged side by side at the bearing of trend of the lower end edge rake arms 24 of rake arms 24, the cirque structure siege 23 be made up of refractory brick is provided with in the horizontal direction below rake teeth 25, siege 23 outer ledge is connected with the inwall of main body cover 1, siege 23 inside edge is near central shaft 22, the first material-dropping hole 27 is provided with between siege 23 inside edge and central shaft 23.In each layer sieve materials device from top to bottom, the outer ledge place of the siege 23 of ground floor, third layer, layer 5 and layer 7 offers the second material-dropping hole 26, and the upper end at the siege 23 inside edge place of ground floor, third layer and layer 5 is provided with convex tendon 28.The housing of main body cover 1 side vertically offers the multiple passages 31 identical with sieving the materials device number of plies side by side, at each passage 31 place, lambda sensor is installed, oxygen content in air can be detected, offering of each passage 31 is corresponding with the setting height(from bottom) of each sieve materials device highly respectively, enables the air passed in each passage 31 be distributed to each layer accurately.The housing of main body cover 21 opposite side vertically installs four igniters 29 side by side, the firing tip of each igniter 29 lays respectively at hull outside, the discharge end of each igniter 29 is positioned at enclosure interior, and the setting height(from bottom) of four igniters 29 lays respectively between sieve materials device ground floor and the second layer, between the second layer and third layer, between the 4th layer and layer 5, between layer 5 and layer 6.Also be respectively arranged with the material inlet 34 and exhaust chimney 32 that are communicated with the first cavity inside at the marginal position on main body cover 1 top, central shaft 22 top is connected with the air inlet on exhaust chimney 32 sidewall, and the second cavity and exhaust chimney 32 inside are interconnected.The Residue extraction pipeline 35 be communicated with the first cavity inside is provided with in main body cover 21 bottom.
The process that multi-stage oven 1 pair of mud carries out calcination processing is: in the first cavity, constantly add the mud after dehydration by material inlet 34, initial igniter 29 is lighted a fire, heat temperature raising is carried out to the second cavity inside, and pass into air by seven passages 31 respectively in the second cavity, control point firearm 29 and draft speed regulate heating-up temperature and oxygen feeding amount respectively respectively, the temperature making top sieve materials device remains on 160 DEG C ~ 310 DEG C, the temperature of middle part sieve materials device remains on 390 DEG C ~ 460 DEG C, the temperature of bottom sieve materials device remains on 560 DEG C, by making mud abundant pyrolysis in multi-stage oven 1 to the control of each layer temperature and oxygen feeding amount respectively.Open drive motors 15 and central shaft air-cooler 14 simultaneously, central shaft 22 rotates under the drive of driving shaft, cooling air is passed in the second cavity from central shaft 22 bottom by central shaft air-cooler 14, multi-stage oven 1 is lowered the temperature, prevents multi-stage oven 1 internal temperature from gathering and too highly cannot reach best heating effect.First the mud added drop on the siege 23 in ground floor sieve materials device, mud is evenly paved on siege 23 by the rake teeth 25 rotated, igniter 29 pairs of mud heat, along with constantly adding of mud, unnecessary mud is pushed to the edge of siege 23 both sides by rake teeth 25, the convex tendon 28 arranged due to the inside edge place of ground floor siege 23 blocks mud and drops from the first material-dropping hole 27, mud drops on the siege 23 second layer sieve materials device from the second material-dropping hole 26, pushed to the edge of siege 23 both sides by rake teeth 25 after mud heating on second layer siege 23 and drop on the siege 23 third layer sieve materials device from the first material-dropping hole 27, mud on each layer siege 23 after heating under the promotion of rake teeth 25 successively downwards one deck drop, be positioned at ground floor, third layer, the mud of layer 5 falls 26 respectively by the second material-dropping hole of each layer and falls lower one deck, be positioned at the second layer, 4th layer, the mud of layer 6 drops to lower one deck respectively by the first material-dropping hole 27 of each layer, the mud being positioned at layer 7 drops to lower one deck respectively by the first material-dropping hole 27 and the second material-dropping hole 26.Mud abundant pyrolysis in multi-stage oven 1 finally generates solid product and the second gaseous products, solid product not containing multiring aromatic hydrocarbon substance is discharged to multi-stage oven 1 outside by Residue extraction pipeline 35 and stacks, it is outside that second gaseous products is discharged to multi-stage oven 1 by exhaust chimney 32, and further purify.
The utility model multi-stage oven soil repair system to the process that the soil containing polycyclic aromatic hydrocarbon is repaired is: the soil containing polycyclic aromatic hydrocarbon is carried out repeatedly broken, screening through crushing and screening device 17, makes diameter of soil pellet reach 0.1 ~ 1.5cm.Crushing and screening device 17 by broken, sieve in bucket elevator 3 that soil up to standard is transported in heated sealed room 2, soil after fragmentation, screening is beneficial to the volatilization of wherein multiring aromatic hydrocarbon substance, heated sealed room 2 mean temperature is 460 DEG C in addition, and high temperature promotes the volatilization of multiring aromatic hydrocarbon substance further.The first gaseous products in heated sealed room 2 contains a large amount of multiring aromatic hydrocarbon substances, first gaseous products is directly entered in after-burner 3 by the gas discharge outlet on top, heated sealed room 2 and carries out high-temp combustion, regulate oxygen feeding amount to make the temperature of after-burner 3 be 850 DEG C.Soil after heating in heated sealed room 2 is transported in feeding screw 16 by bucket elevator 3, soil to be transported in multi-stage oven 1 by the material inlet on multi-stage oven 1 top and to carry out pyrolysis by feeding screw 16, pyrolysis generates solid product and the second gaseous products, and in the pyrolysis soil of multi-stage oven 1, remaining multiring aromatic hydrocarbon substance all volatilizees and is present in a gaseous form in the second gaseous products.Solid product no longer containing multiring aromatic hydrocarbon substance is discharged to multi-stage oven 1 by Residue extraction pipeline 35 outside, and other harmful substances be transported in the solid product of purification soil stacking 12 pairs, field purify.The second gaseous products containing multiring aromatic hydrocarbon substance is entered into after-burner 3 by the pyrolysis gas outlet on multi-stage oven 1 top, the multiring aromatic hydrocarbon substance in the second gaseous products is carried out Thorough combustion.Be mainly carbonaceous gas, sulfurous gas, moisture and dust in the 3rd gaseous products after burning in after-burner 3, first the 3rd gaseous products carried out dedusting by sack cleaner 7, obtains the 4th gaseous products eliminating dust and granule foreign.4th gaseous products is passed into desulfurizing tower 8 and carries out gas washing, to the 5th gaseous products after the sulphur-containing substance in removal the 4th gaseous products, the waste liquid in desulfurizing tower 8 enters in cesspool 9.5th gaseous products is passed in cooling tower 4, in cooling tower 4, the 5th gaseous products is sprayed, is atomized, after the soluble gas such as the moisture in removal the 5th gaseous products and aldehydes, obtain the 6th gaseous products.6th gaseous products is removed a small amount of dust wherein and peculiar smell by active carbon adsorber 6, before passing into active carbon adsorber 6, the 6th gaseous products is concentrated by gas concentration unit 5, to increase the adsorbance of active carbon adsorber 6.The 7th gaseous products finally obtained externally is discharged by exhaust chimney 10 after smoke on-line monitoring system analysis detection reaches discharge standard.
The utility model multi-stage oven soil repair system, before pyrolysis is carried out to the soil containing multiring aromatic hydrocarbon substance, soil is carried out sufficient fragmentation, screening, and the soil after broken, screening is transported in heated sealed room 2 carries out high-temperature heating, the multiring aromatic hydrocarbon substance of volatilization is directly passed in after-burner 3 and burns, after avoiding fragmentation, screening, the multiring aromatic hydrocarbon substance of volatilization directly enters in air, causes air pollution.Multi-stage oven 1 is adopted to carry out pyrolysis to the soil containing multiring aromatic hydrocarbon substance, temperature controls flexibly, large quantity of air is not needed to carry out combustion-supporting, solid product and the second gaseous products is had to after pyrolysis, not containing multiring aromatic hydrocarbon substance in solid product, directly can stack in field 12 at purification soil and stack, pernicious gas can not be discharged in oriented air.Multiring aromatic hydrocarbon substance all burns through after-burner 3 by the second gaseous products successively, gas after burning successively through dedusting, sulphur removal, except soluble gas, the process such as to eliminate the unusual smell after the gas that finally obtains can reach discharge standard, and externally discharged by exhaust chimney, device structure is simple, cost is low, multiring aromatic hydrocarbon substance purification is thorough, has very high using value in soil remediation field.Multi-stage oven 1 and after-burner 3 all adopt Automated condtrol, and brakingization, intelligence degree are high.Poisonous and harmful substances in product is all decomposed and absorbs, and does not have unnecessary toxic gas externally to discharge in pyrolytic process, and peculiar smell is absorbed resident's normal life that can not affect surrounding, more can not cause secondary pollution to environment.And this multi-stage oven repair system adopts pyrolysis principle, can not cause the soil desertification after reparation, can not the reverse repair ability of spoiled soil.The utility model floor space is little, cost is low, can not cause environmental pollution, compared with prior art has obvious advantage.
Above-described embodiment is only be described preferred embodiment of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (9)
1. a multi-stage oven soil repair system, it is characterized in that: comprise multi-stage oven (1), heated sealed room (2), after-burner (3), desulfurizing tower (8), cooling tower (4) and active carbon adsorber (6), heated sealed room is provided with heater in (2), the gas discharge outlet of heated sealed room (2) is connected with the air inlet of after-burner (3), the discharging opening of heated sealed room (2) is connected with the material inlet of multi-stage oven (1), multi-stage oven (1) comprises again main body cover (21), central shaft (22), siege (23), rake arms (24) and drive motors (15), the inwall of main body cover (21) is equipped with flame retardant coating, seal cover is respectively arranged with on the top of main body cover (21) and bottom, central shaft (22) is through the first cavity of main body cover (21) inside, central shaft (22) top is stretched out from the centre position on main body cover (21) top, central shaft (22) bottom is stretched out from the centre position of main body cover (21) bottom, the driving shaft of drive motors (15) is connected with the outer wall of central shaft (22) bottom, 6 ~ 7 layers of sieve materials device are evenly provided with in direction from top to bottom, the upper edge of the central shaft (22) being positioned at the first cavity inside, every layer of sieve materials device comprises again and connects annulus (20), rake arms (24), rake teeth (25) and siege (23), connecting annulus (30) is set on the outer wall of central shaft (22), the outer ledge place of each connection annulus (30) is provided with at least one link, link is connected with the one end of rake arms (24), the inwall of the other end near main body cover (21) of rake arms (24), the lower end of rake arms (24) is provided with rake teeth (25), rake teeth (25) below is provided with siege (23) in the horizontal direction, siege (23) outer ledge is connected with the inwall of main body cover (21), siege (23) inside edge is near central shaft (22), the first material-dropping hole (27) is provided with between siege (23) inside edge and central shaft (22), each layer sieve materials device from top to bottom can be divided into again top to sieve materials device, middle part sieve materials device and bottom sieve materials device, the number of plies of top sieve materials device is 2 layers, the number of plies of middle part sieve materials device is 2 layers ~ 3 layers, the number of plies of bottom sieve materials device is 2 layers, the second material-dropping hole (26) is offered at the outer ledge place of the siege being arranged in top sieve materials device and middle part sieve materials device odd-level, and the upper end at siege (23) inside edge place is provided with convex tendon (28), the second material-dropping hole (26) is offered at the outer ledge place of the lower floor's siege being arranged in bottom sieve materials device, the housing of main body cover (21) side offers 6 ~ 7 passages (31), at each passage (31) place, lambda sensor is installed, the housing of main body cover (21) opposite side is provided with multiple igniter (29), main body cover (21) top is provided with exhaust chimney (32), central shaft (22) top is communicated with exhaust chimney (32), main body cover (21) bottom is provided with Residue extraction pipeline (35), the pyrolysis gas outlet on multi-stage oven (1) top is communicated with the air inlet of after-burner (3), the sidewall of after-burner (3) offers natural gas air inlet and combustion air air inlet, igniter (29) is connected with natural-gas transfer pipeline respectively with natural gas air inlet, passage (31) is connected with combustion air blower fan (15) respectively by gas pipeline with combustion air air inlet, the sidewall of after-burner (3) is provided with lambda sensor, the exhaust outlet of after-burner (3) is connected with the air inlet of sack cleaner (7), the gas outlet of sack cleaner (7) is connected with the air inlet of desulfurizing tower (8), the exhaust outlet of desulfurizing tower (8) is connected with the air inlet of cooling tower (4), the gas outlet of cooling tower (4) is connected with the air inlet of active carbon adsorber (6), the gas outlet of active carbon adsorber (6) is connected with exhaust chimney (10).
2. multi-stage oven soil repair system according to claim 1, it is characterized in that: described multi-stage oven soil repair system also comprises crushing and screening device (17) and bucket elevator (3), it is inner that bucket elevator (3) is arranged on heated sealed room (2), the discharging opening of crushing and screening device (17) is connected with the feeding mouth of bucket elevator (3) lower end, the discharging opening of bucket elevator (3) upper end is connected with the charging aperture of feeding screw (16), feeding screw (16) is arranged on the discharge outlet of heated sealed room (2), the discharging opening of feeding screw (16) is connected with the material inlet of multi-stage oven (1).
3. multi-stage oven soil repair system according to claim 2, is characterized in that: described crushing and screening device (17) diameter that is soil particle is broken, screening is 0.1 ~ 1.5cm.
4. multi-stage oven soil repair system according to claim 1, is characterized in that: described heated sealed room (2) internal temperature is 460 DEG C.
5. multi-stage oven soil repair system according to claim 1, it is characterized in that: between described cooling tower (4) and active carbon adsorber (6), be also provided with gas concentration unit (5), the air inlet of gas concentration unit (5) is connected with the gas outlet of cooling tower (4), and the gas outlet of gas concentration unit (5) is connected with the air inlet of active carbon adsorber (6).
6. multi-stage oven soil repair system according to claim 1, it is characterized in that: described central shaft (22) is the inner tube-shaped structure being provided with the second cavity, the hot gas outlet (37) that the sidewall on central shaft (22) top is offered is communicated with the medium position of inner first cavity of multi-stage oven (1), also arrange central shaft air-cooler (14) in central shaft (22) bottom, the air outlet of central shaft air-cooler (14) is by pipeline and inner the second cavity connects of central shaft (22).
7. multi-stage oven soil repair system according to claim 1, it is characterized in that: the quantity of described sieve materials device is 7 layers, ground floor and the second layer are top sieve materials device from top to bottom, third layer, 4th layer is middle part sieve materials device with layer 5, layer 6 and layer 7 are bottom sieve materials device, ground floor, third layer, the outer ledge place of the siege of layer 5 and layer 7 offers the second material-dropping hole (26), ground floor, the upper end at siege (23) the inside edge place of third layer and layer 5 is provided with convex tendon (28), the quantity that the housing of main body cover (21) side is offered passage (31) is 7, each passage (31) is vertically offered side by side, offering of each passage (31) is corresponding with the setting height(from bottom) of each sieve materials device highly respectively, on the housing of main body cover (21) opposite side, the quantity of mounting points firearm (29) is 4, each igniter (29) is vertically installed side by side, the firing tip of igniter (29) is positioned at hull outside, the discharge end of igniter (29) is positioned at enclosure interior.
8. multi-stage oven soil repair system according to claim 7, is characterized in that: the setting height(from bottom) of described 4 igniters (29) lays respectively between sieve materials device ground floor and the second layer, between the second layer and third layer, between the 4th layer and layer 5, between layer 5 and layer 6.
9. multi-stage oven soil repair system according to claim 7, is characterized in that: the temperature of described top sieve materials device is 160 DEG C ~ 310 DEG C, and the temperature of middle part sieve materials device is 390 DEG C ~ 460 DEG C, and the temperature of bottom sieve materials device is 560 DEG C.
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| CN201420711685.6U CN204234456U (en) | 2014-11-24 | 2014-11-24 | Multi-stage oven soil repair system |
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| CN201420711685.6U CN204234456U (en) | 2014-11-24 | 2014-11-24 | Multi-stage oven soil repair system |
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| CN204234456U true CN204234456U (en) | 2015-04-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105855278A (en) * | 2016-05-16 | 2016-08-17 | 温岭市创嘉信息科技有限公司 | Remediation and treatment device for garden soil with organic pollutants |
| CN106903154A (en) * | 2017-03-27 | 2017-06-30 | 中国环境科学研究院 | A kind of hot restorative procedure of organic polluted soil |
| CN107999529A (en) * | 2017-12-18 | 2018-05-08 | 上海康恒环境股份有限公司 | A kind of rotary kiln thermal desorption device for being evenly heated material |
| CN109848197A (en) * | 2019-01-04 | 2019-06-07 | 北京坤达胜源环境科技有限公司 | A kind of thermal desorption repair system of organic material contaminated soil |
| CN110014035A (en) * | 2019-05-22 | 2019-07-16 | 孙晓凡 | A kind of thermal desorption soil remediation equipment |
| CN110026425A (en) * | 2019-03-30 | 2019-07-19 | 望江县同心农业专业合作社 | A kind of organic material contaminated soil repair system |
| CN111438177A (en) * | 2020-04-13 | 2020-07-24 | 中国矿业大学 | System for chemical oxidation and microbial remediation cooperate with petroleum hydrocarbon contaminated soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105855278A (en) * | 2016-05-16 | 2016-08-17 | 温岭市创嘉信息科技有限公司 | Remediation and treatment device for garden soil with organic pollutants |
| CN105855278B (en) * | 2016-05-16 | 2019-02-22 | 朱飞龙 | A kind of garden soil organic pollutant repair process device |
| CN106903154A (en) * | 2017-03-27 | 2017-06-30 | 中国环境科学研究院 | A kind of hot restorative procedure of organic polluted soil |
| CN107999529A (en) * | 2017-12-18 | 2018-05-08 | 上海康恒环境股份有限公司 | A kind of rotary kiln thermal desorption device for being evenly heated material |
| CN109848197A (en) * | 2019-01-04 | 2019-06-07 | 北京坤达胜源环境科技有限公司 | A kind of thermal desorption repair system of organic material contaminated soil |
| CN110026425A (en) * | 2019-03-30 | 2019-07-19 | 望江县同心农业专业合作社 | A kind of organic material contaminated soil repair system |
| CN110014035A (en) * | 2019-05-22 | 2019-07-16 | 孙晓凡 | A kind of thermal desorption soil remediation equipment |
| CN111438177A (en) * | 2020-04-13 | 2020-07-24 | 中国矿业大学 | System for chemical oxidation and microbial remediation cooperate with petroleum hydrocarbon contaminated soil |
| CN111438177B (en) * | 2020-04-13 | 2021-06-25 | 中国矿业大学 | System for chemical oxidation and microbial remediation cooperate with petroleum hydrocarbon contaminated soil |
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