CN113941593A - Miniaturized high concentration pollutes soil dystopy thermal desorption system - Google Patents
Miniaturized high concentration pollutes soil dystopy thermal desorption system Download PDFInfo
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- CN113941593A CN113941593A CN202111157259.3A CN202111157259A CN113941593A CN 113941593 A CN113941593 A CN 113941593A CN 202111157259 A CN202111157259 A CN 202111157259A CN 113941593 A CN113941593 A CN 113941593A
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- pipeline
- flue gas
- activated carbon
- box body
- heat exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a miniaturized high-concentration polluted soil ex-situ thermal desorption system, which comprises a rotary kiln, a secondary combustion chamber, a dust removal filter, a heat exchange cooler and a desulfurizing tower, and is characterized in that: the heat exchange cooler is internally provided with a first heat exchange pipeline and a second heat exchange pipeline, two ends of the second heat exchange pipeline extend out of the heat exchange cooler and are respectively connected with the air inlet pipeline and the air outlet pipeline, the air outlet pipeline is connected with the six-way valve, a first air outlet of the six-way valve is communicated with an auxiliary air inlet of the rotary kiln through a first conveying pipeline, a second air outlet of the six-way valve is communicated with an auxiliary air inlet of the second combustion chamber through a second conveying pipeline, and a third air outlet of the six-way valve is connected with a hot air delivery pipeline. The invention collects the heat of the flue gas discharged from the second combustion chamber by using the heat exchange cooler, and conveys the collected heat into the rotary kiln and the second combustion chamber again by using the air, so that the energy loss can be effectively reduced, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a miniaturized high-concentration contaminated soil ex-situ thermal desorption system.
Background
With the development of industry and agriculture and the acceleration of urbanization process, the adjustment of industrial structure and the acceleration of urbanization process, a large number of polluted enterprises relating to industries such as chemical industry, metallurgy, petroleum, transportation, light industry and the like are moved or closed in sequence. In the process of re-development and utilization of volatile pollutants in soil in a plurality of industrial enterprises removed and left sites, the volatile and semi-volatile pollutants in the soil can enter other environment media through gas-soil circulation and water-soil circulation, and can also directly enter human bodies through food chains or human breath to harm human health. Volatile and semi-volatile pollutants in the soil are listed as toxic pollutants which have high potential danger in the environment and should be preferentially controlled.
At present, the repair technology for polluted soil has two modes of in-situ repair and ex-situ repair, wherein:
the in-situ remediation of the polluted soil does not need to excavate and transport the soil, so the required engineering amount is relatively small, and the common processes comprise in-situ vapor extraction, in-situ chemical remediation and the like, but the in-situ treatment processes generally have the defects of long treatment time, low treatment efficiency, low removal rate of volatile and semi-volatile pollutants and the like, and the problems of secondary pollution and the like possibly caused by the in-situ chemical remediation process;
the common techniques for ex-situ remediation of contaminated soil include ex-situ thermal desorption treatment, ex-situ chemical remediation, etc., wherein the ex-situ thermal desorption treatment has a good effect, and the ex-situ thermal desorption treatment uses a rotary kiln as thermal desorption equipment and is widely applied. When the rotary kiln is adopted for treating the polluted soil, the polluted soil is turned in the rotary kiln and exchanges heat with the flue gas in a reverse direction, so that the aim of removing volatile and semi-volatile pollutants from the soil is fulfilled; however, the flue gas passing through the secondary combustion chamber is usually only directly cooled, and heat is not recycled, so that great energy waste can be caused, and the cost is greatly increased.
Moreover, the existing ex-situ thermal desorption systems are large-scale, require a large floor space during installation, and are inconvenient to install and maintain, so that the design of a miniaturized ex-situ thermal desorption system for high-concentration contaminated soil is particularly important in order to solve the problems, and the miniaturization is also an important research and development direction of the ex-situ thermal desorption system.
Disclosure of Invention
The invention provides a miniaturized high-concentration polluted soil ex-situ thermal desorption system, which is characterized in that a heat exchange cooler is utilized to collect the heat of flue gas exhausted from a secondary combustion chamber, and the collected heat is conveyed into a rotary kiln and the secondary combustion chamber again through air, so that the energy loss can be effectively reduced, and the cost is reduced; and the temperature of the discharged gas can be reduced, and the adverse effect on the surrounding environment can be reduced.
In order to solve the technical problem, the invention provides a miniaturized high-concentration polluted soil ex-situ thermal desorption system, which comprises a rotary kiln, a secondary combustion chamber, a dust removal filter, a heat exchange cooler and a desulfurizing tower, and is characterized in that: the rotary kiln is a small rotary kiln, the secondary combustion chamber is a small bedroom secondary combustion chamber, the dust removal filter consists of an active carbon dust removal filtering system and a bag-type dust remover, the air outlet of the rotary kiln is communicated with an active carbon dust removal filtering system through a first flue gas conveying pipeline, the active carbon dust removal filtering system is communicated with an air inlet of the secondary combustion chamber through a second flue gas conveying pipeline, the gas outlet of the second combustion chamber is communicated with the flue gas accelerating device through a third flue gas conveying pipeline, the flue gas accelerating device is communicated with a flue gas inlet of the heat exchange cooler through a fourth flue gas conveying pipeline, the smoke outlet of the heat exchange cooler is communicated with the air inlet of the bag-type dust remover through a fifth smoke conveying pipeline, the gas outlet of the bag-type dust collector is communicated with the desulfurizing tower through a sixth flue gas conveying pipeline, and a first air pump is installed on the sixth flue gas conveying pipeline;
the heat exchange cooler is internally provided with a first heat exchange pipeline and a second heat exchange pipeline which are both in a spiral shape, the heat exchange cooler is filled with a heat exchange medium, the first heat exchange pipeline is contacted with the second heat exchange pipeline through the heat exchange medium, two ends of the first heat exchange pipeline are respectively communicated with a flue gas inlet and a flue gas outlet of the heat exchange cooler, two ends of the second heat exchange pipeline extend out of the heat exchange cooler and are respectively connected with a gas inlet pipeline and a gas outlet pipeline, the gas inlet pipeline is provided with a second air pump, the gas outlet pipeline is provided with a third air pump, the gas outlet pipeline is connected with a six-way valve, a first gas outlet of the six-way valve is communicated with an auxiliary gas inlet of the rotary kiln through a first conveying pipeline, a second gas outlet of the six-way valve is communicated with an auxiliary gas inlet of a second combustion chamber through a second conveying pipeline, and a third air outlet of the six-way valve is connected with a hot air delivery pipeline, and a pressure air pump is arranged on the hot air delivery pipeline.
Further: the active carbon dust removal and filtration system comprises a mounting frame, a dust removal and filtration box body, an active carbon regeneration box body, a first active carbon storage seat, a first grid plate, a sealing plate, a first electric cylinder, a sealed electric cylinder and a translation trolley, wherein the dust removal and filtration box body is fixed on the mounting frame, the lower end of the dust removal and filtration box body is funnel-shaped, a support column is vertically arranged at the bottom of the mounting frame, the dust removal and filtration box body and the active carbon regeneration box body are connected into a whole in a vertical and integrated manner, the lower end of the active carbon regeneration box body is also funnel-shaped, the translation trolley is connected on a slide rail in a sliding manner, the translation trolley moves along the slide rail to be under a discharge port at the bottom of the active carbon regeneration box body, a sealed switch valve is arranged at the discharge port at the bottom of the active carbon regeneration box body, a flue gas inlet is formed in the side wall at the upper end of the dust removal and filtration box body, a flue gas outlet is further formed in the side wall at the lower end of the dust removal and filtration box body, the dust removal filter box comprises a dust removal filter box body, a first activated carbon storage seat, a first grid plate, a first through groove, a sealing plate and a second flue gas conveying pipeline, wherein the first activated carbon storage seat is fixed on the inner wall of the dust removal filter box body between a flue gas inlet and a flue gas outlet, the bottom of the first activated carbon storage seat is further connected with the first grid plate in a sliding mode, the first through groove used for stretching out of the first grid plate is formed in the side wall of the dust removal filter box body, one end of the first grid plate extends into the first through groove and is connected with a first electric cylinder fixed on the outer wall of the dust removal filter box body, the flue gas inlet is connected with the first flue gas conveying pipeline, the flue gas outlet is connected with the second flue gas conveying pipeline, the sealing plate is further connected in the dust removal filter box body below the flue gas outlet in a movable mode, the dust removal filter box body is sealed with an activated carbon regeneration box body through the sealing plate, a second through groove matched with the sealing plate is also formed in the side wall of the dust removal filter box body, one end of the sealing plate extends into the second through groove and is fixed on the outer wall of the dust removal filter box body Are connected.
Further: the activated carbon regeneration box body is internally fixed with a second activated carbon storage seat, the bottom of the second activated carbon storage seat is connected with a second grid plate in a sliding manner, a third through groove for the second grid plate to extend out is formed in the side wall of the activated carbon regeneration box body, one end of the second grid plate extends into the third through groove and is connected with a second electric cylinder fixed on the outer wall of the activated carbon regeneration box body, a hot air inlet and a cold air inlet are formed in the side wall of the activated carbon regeneration box body above the second activated carbon storage seat, the cold air inlet is connected with a cold air inlet pipeline, the hot air inlet is connected with a hot air inlet pipeline, a cold air outlet and a hot air outlet are formed in the side wall of the activated carbon regeneration box body below the second activated carbon storage seat, the cold air outlet is connected with a cold air outlet pipeline, the hot air outlet is communicated with an air inlet of a second flue gas conveying pipeline through the hot air outlet pipeline, and then is communicated with an air inlet of a second combustion chamber together, and a nitrogen inlet and an ammonia inlet are also formed in the side wall of the activated carbon regeneration box body below the cold air outlet and the hot air outlet, the nitrogen inlet is connected with a nitrogen inlet pipeline, and the ammonia inlet is connected with an ammonia inlet pipeline.
And further: first active carbon storage seat and second active carbon storage seat in all set up a plurality of storage channels that are used for storing the active carbon that link up from top to bottom, the active carbon in the first active carbon storage seat passes through the restriction of first grid plate in the storage channel of first active carbon storage seat, the active carbon passes through the restriction of second grid plate in the storage channel of second active carbon storage seat in the second active carbon storage seat, the top of dust removal filtration box be provided with the kuppe rather than being linked together, the kuppe rather than the active carbon feed bin directly over be linked together, the active carbon in the first active carbon storage seat fills through the active carbon feed bin.
And further: and a fourth gas outlet of the six-way valve is connected with a gas inlet of the heating device through a third conveying pipeline, a hot gas inlet pipeline is connected with a gas outlet of the heating device, and one end of the third conveying pipeline, which is close to the heating device, is also connected with a hot gas supplementing pipeline.
And further: the heating device comprises a heating box body, an electric heating pipe, a first partition plate and a second partition plate, a plurality of first partition plates and second partition plates are sequentially arranged in the heating box body from left to right, the first partition plates and the second partition plates are arranged in a staggered manner, the first partition plate is more than the second partition plate, an electric heating pipe is respectively arranged in the heating box body between the adjacent first partition plate and the second partition plate, the upper end and the front and rear outer walls of the first partition plate are respectively contacted with the top wall and the front and rear inner walls in the heating box body, there is the clearance between the lower extreme of first division board and the bottom in the heating box body, the lower extreme of second division board and front and back outer wall contact with the bottom in the heating box body and front and back inner wall respectively, leave the clearance between the roof in the upper end of second division board and the heating box body.
And further: the smoke accelerating device comprises three smoke accelerating pipelines, a left supporting disk, a right supporting disk, two rotating disks, a servo motor and rotating shafts, wherein the three smoke accelerating pipelines are all Tesla valve pipelines, the rotating disks are provided with two blocks, an equilateral triangle of the three smoke accelerating pipelines is arranged between the two rotating disks, two ends of each smoke accelerating pipeline respectively penetrate through the rotating disks on two sides, the left supporting disk and the right supporting disk are oppositely arranged, one surfaces of the left supporting disk and the right supporting disk are respectively provided with a circular groove used for connecting the rotating disks, the two rotating disks are respectively and rotatably connected in the circular grooves of the left supporting disk and the right supporting disk, the servo motor is arranged on the outer wall of the left supporting disk and is connected with the rotating shaft of the servo motor, the rotating shafts extend into the circular grooves of the left supporting disk and are connected with the rotating disk in the circular groove of the left supporting disk, and the three smoke accelerating pipelines rotate under the driving of the servo motor along with the rotating disks, the utility model discloses a flue gas pipeline, including left side supporting disk, right side supporting disk, connecting disk, flue gas acceleration pipeline, third flue gas pipeline, left side supporting disk with all be provided with three connecting disk in the circular recess of right side supporting disk relatively, the center department of connecting disk has all seted up the through-hole, and three connecting disk also is regular triangle and arranges in the same circular recess, the flue gas pipeline with higher speed link to each other with three connecting disk in the circular recess of both sides in proper order along with the rotation, the connecting disk of top is linked together with third flue gas pipeline in the left side supporting disk, the connecting disk of top is linked together with fourth flue gas pipeline in the right side supporting disk.
And further: the connecting disc of the lowest portion in the left supporting disc is connected with the waste residue collecting box through a backflow pipeline, the connecting disc of the lowest portion in the right supporting disc is connected with the water storage tank through a flushing pipeline, and a liquid pump is installed on the flushing pipeline.
And further: and a fifth gas outlet of the six-way valve is connected with a connecting disc at the middle position in the right supporting disc through a fourth conveying pipeline, the connecting disc at the middle position in the left supporting disc is connected with an exhaust pipeline, and the exhaust pipeline and the second flue gas conveying pipeline are converged and then are communicated with a gas inlet of the secondary combustion chamber.
And further: the both ends of pipeline are all provided with expansion joint with higher speed to the flue gas, expansion joint constitute by fixed part, pars contractilis and spring, the one end of fixed part and flue gas pipeline are even as an organic whole with higher speed, the one end of pars contractilis stretches into to its inside from the other end of fixed part, the pars contractilis stretches into one end in the fixed part and flue gas and extends to between the pipeline with higher speed to have the spring, the other end of pars contractilis stretches into to the connection pad under the effect of spring in, the pars contractilis keeps away from and extends to on the outer wall of fixed part one end and has first conical surface, all extend on the inner wall of connection pad and the outer wall have with first conical surface assorted second conical surface, first conical surface contact with second conical surface on the connection pad inner wall under the effect of spring and seal.
After the structure is adopted, the heat exchange cooler is used for collecting the heat of the flue gas exhausted from the secondary combustion chamber, and the collected heat is conveyed into the rotary kiln and the secondary combustion chamber again through the air, so that the energy loss can be effectively reduced, and the cost is reduced; the temperature of the discharged gas can be reduced, and the adverse effect on the surrounding environment is reduced; and the collected heat can be combined with high-temperature gas and then used active carbon is regenerated through heating, so that the resource is saved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an internal structural view of the activated carbon dust removal filter system.
Fig. 3 is a schematic structural diagram of a flue gas acceleration device.
Fig. 4 is a schematic structural view of the left support plate.
Fig. 5 is a structural view of the expansion joint.
Fig. 6 is an internal structure view of the heating device.
Fig. 7 is an internal structural view of a flue gas acceleration duct.
Detailed Description
As shown in fig. 1, a miniaturized high concentration pollutes soil dystopy thermal desorption system, including rotary kiln 2, second combustion chamber 4, dust removal filter 3, heat transfer cooler 7 and desulfurizing tower 9, the rotary kiln be small-size rotary kiln, the second combustion chamber be the small-size second combustion chamber of bedroom, dust removal filter constitute by active carbon dust removal filtration system 3 and sack cleaner 8, the gas outlet of rotary kiln is linked together with active carbon dust removal filtration system through first flue gas pipeline 11, active carbon dust removal filtration system be linked together through the air inlet of second flue gas pipeline 12 with the second combustion chamber, the gas outlet of second combustion chamber is linked together through third flue gas pipeline 13 and flue gas accelerating device 5 again, flue gas accelerating device be linked together through the flue gas inlet of fourth flue gas pipeline 14 with the heat transfer cooler again, the exhanst gas outlet of heat transfer cooler links to each other through the air inlet of fifth flue gas pipeline 15 with the sack cleaner The gas outlet of the bag-type dust collector is communicated with the desulfurizing tower through a sixth flue gas conveying pipeline 16, and a first air pump 37 is installed on the sixth flue gas conveying pipeline;
a first heat exchange pipeline and a second heat exchange pipeline are arranged in the heat exchange cooler, the first heat exchange pipeline and the second heat exchange pipeline are both in a spiral shape, a heat exchange medium is filled in the heat exchange cooler, the first heat exchange pipeline is contacted with the second heat exchange pipeline through the heat exchange medium, two ends of the first heat exchange pipeline are respectively communicated with a flue gas inlet and a flue gas outlet of the heat exchange cooler, two ends of the second heat exchange pipeline extend out of the heat exchange cooler and are respectively connected with an air inlet pipeline 21 and an air outlet pipeline 22, a second air pump 38 is arranged on the air inlet pipeline, a third air pump 40 is arranged on the air outlet pipeline, the air outlet pipeline is connected with a six-way valve 10, a first air outlet of the six-way valve is communicated with an auxiliary air inlet of the rotary kiln through a first conveying pipeline 23, a second air outlet of the six-way valve is communicated with an auxiliary air inlet of a second combustion chamber through a second conveying pipeline 24, the third air outlet of the six-way valve is connected with a hot air delivery pipeline 25, and a pressure air pump 41 is installed on the hot air delivery pipeline.
The heat exchange cooler is used for collecting the heat of the flue gas discharged from the secondary combustion chamber, and the collected heat is conveyed into the rotary kiln and the secondary combustion chamber again through the air, so that the energy loss can be effectively reduced, and the cost is reduced; and the temperature of the discharged gas can be reduced, and the adverse effect on the surrounding environment can be reduced.
The active carbon dust removal and filtration system shown in figure 2 comprises a mounting frame 3-3, a dust removal and filtration box body 3-1, an active carbon regeneration box body 3-2, a first active carbon storage seat 3-10, a first grid plate 3-11, a sealing plate 3-14, a first electric cylinder 3-12, a sealed electric cylinder 3-13 and a translation trolley 3-5, wherein the dust removal and filtration box body is fixed on the mounting frame, the lower end of the dust removal and filtration box body is funnel-shaped, a support column 3-7 is vertically arranged at the bottom of the mounting frame, the dust removal and filtration box body and the active carbon regeneration box body are connected into a whole in an up-and-down manner, the lower end of the active carbon regeneration box body is also funnel-shaped, the translation trolley is slidably connected on a slide rail 3-6, the translation trolley moves along the slide rail to be right below a discharge port at the bottom of the active carbon regeneration box body, and a sealed switch valve 3-4 is installed at the discharge port at the bottom of the active carbon regeneration box body, the side wall of the upper end of the dust-removing filtering box body is provided with a flue gas inlet, the side wall of the lower end of the dust-removing filtering box body is also provided with a flue gas outlet, the first activated carbon storage seat is fixed on the inner wall of the dust-removing filtering box body between the flue gas inlet and the flue gas outlet, the bottom of the first activated carbon storage seat is also connected with a first grid plate in a sliding manner, the side wall of the dust-removing filtering box body is provided with a first through groove for the first grid plate to extend out, one end of the first grid plate extends into the first through groove and is connected with a first electric cylinder fixed on the outer wall of the dust-removing filtering box body, the flue gas inlet is connected with a first flue gas conveying pipeline, the flue gas outlet is connected with a second flue gas conveying pipeline, a sealing plate is movably connected in the dust-removing filtering box body below the flue gas outlet, and the dust-removing filtering box body is sealed with an activated carbon regeneration box body through the sealing plate, and a second through groove matched with the sealing plate is also formed in the side wall of the dedusting filtering box body, and one end of the sealing plate extends into the second through groove and is connected with a sealed electric cylinder fixed on the outer wall of the dedusting filtering box body. The dust removal filter box has the advantages that the dust removal is carried out through the activated carbon in the dust removal filter box body, the activated carbon is replaced and then used continuously after being used for a period of time, the replaced activated carbon falls into the activated carbon regeneration box body to be regenerated and then is collected through the translation trolley to be recycled, and the structure and the mode play a role in saving resources and reducing cost.
As shown in fig. 2, a second activated carbon storage seat 3-17 is fixed in the activated carbon regeneration box, the bottom of the second activated carbon storage seat is connected with a second grid plate 3-16 in a sliding manner, a third through groove for extending the second grid plate is formed in the side wall of the activated carbon regeneration box, one end of the second grid plate extends into the third through groove and is connected with a second electric cylinder 3-15 fixed on the outer wall of the activated carbon regeneration box, a hot air inlet and a cold air inlet are formed in the side wall of the activated carbon regeneration box above the second activated carbon storage seat, the cold air inlet is connected with a cold air inlet pipeline 33, the hot air inlet is connected with a hot air inlet pipeline 31, a cold air outlet and a hot air outlet are formed in the side wall of the activated carbon regeneration box below the second activated carbon storage seat, the cold air outlet is connected with a cold air outlet pipeline 32, the hot gas outlet is communicated with the gas inlet of the second combustion chamber together after converging with the second flue gas conveying pipeline through the hot gas outlet pipeline 34, the side walls of the activated carbon regeneration box body below the cold gas outlet and the hot gas outlet are also provided with a nitrogen inlet and an ammonia inlet, the nitrogen inlet is connected with the nitrogen inlet pipeline 35, and the ammonia inlet is connected with the ammonia inlet pipeline 36.
As shown in fig. 2, a plurality of vertically-through storage channels for storing activated carbon are arranged in the first activated carbon storage seat and the second activated carbon storage seat, the activated carbon in the first activated carbon storage seat is limited in the storage channel of the first activated carbon storage seat through a first grid plate, the activated carbon in the second activated carbon storage seat is limited in the storage channel of the second activated carbon storage seat through a second grid plate, the top of the dedusting filter box body is provided with a flow guide cover 3-9 communicated with the dedusting filter box body, the flow guide cover is communicated with an activated carbon bin 3-8 right above the flow guide cover, and the activated carbon in the first activated carbon storage seat is filled through the activated carbon bin.
The fourth outlet of the six-way valve shown in fig. 1 is connected to the inlet of a heating device 29 via a third delivery conduit 26, the hot gas inlet conduit is connected to the outlet of the heating device, and a hot gas supply conduit 30 is connected to the end of the heating device adjacent to the third delivery conduit. The invention can also combine the collected heat with high-temperature gas and then heat the gas to regenerate the used active carbon, thereby saving resources.
The heating apparatus shown in fig. 6 includes a heating tank body 29-1, an electric heating pipe 29-4, a first partition plate 29-2 and a second partition plate 29-3, a plurality of first partition plates and second partition plates are sequentially arranged in the heating box body from left to right, the first partition plates and the second partition plates are arranged in a staggered manner, the first partition plate is more than the second partition plate, an electric heating pipe is respectively arranged in the heating box body between the adjacent first partition plate and the second partition plate, the upper end and the front and rear outer walls of the first partition plate are respectively contacted with the top wall and the front and rear inner walls in the heating box body, there is the clearance between the lower extreme of first division board and the bottom in the heating box body, the lower extreme of second division board and front and back outer wall contact with the bottom in the heating box body and front and back inner wall respectively, leave the clearance between the roof in the upper end of second division board and the heating box body. The invention prolongs the mixing and heating time of the gas by adopting the structure.
The flue gas accelerating device shown in figures 3, 4 and 7 comprises three flue gas accelerating pipelines 5-1, a left supporting disk 5-2, a right supporting disk 5-3, rotating disks 5-4, servo motors 5-5 and rotating shafts 5-6, wherein the three flue gas accelerating pipelines are Tesla valve pipelines, the rotating disks are provided with two blocks, regular triangles of the three flue gas accelerating pipelines are arranged between the two rotating disks, two ends of the flue gas accelerating pipelines respectively penetrate through the rotating disks on two sides, the left supporting disk and the right supporting disk are oppositely arranged and are provided with circular grooves used for being connected with the rotating disks on one side, the two rotating disks are respectively and rotatably connected in the circular grooves of the left supporting disk and the right supporting disk, the servo motors are arranged on the outer wall of the left supporting disk and are connected with the rotating shafts of the servo motors, the rotating shafts extend into the circular grooves of the left supporting disk and are connected with the circular grooves of the left supporting disk, three flue gas pipeline with higher speed is rotatory under servo motor's drive along with the carousel, left side supporting disk with all be provided with three connection pad 5-7 relatively in the circular recess of right side supporting disk, through-hole 5-8 has all been seted up to the center department of connection pad, and three connection pad also is regular triangle and arranges in the same circular recess, flue gas pipeline with higher speed link to each other with three connection pad in the circular recess of both sides in proper order along with the rotation, the connection pad of top is linked together with third flue gas pipeline in the left side supporting disk, the connection pad of top is linked together with fourth flue gas pipeline in the supporting disk of the right side. The invention plays a role of driving the turntable to rotate by the servo motor after one flue gas acceleration pipeline is used for a period of time, so that the other flue gas acceleration pipeline is used for continuously supplying gas, unnecessary loss caused by blockage of the flue gas acceleration pipeline is prevented, and the flue gas acceleration pipeline is a Tesla valve pipeline, and the heat loss of the flue gas in the conveying process is reduced by the unidirectional acceleration conduction of the Tesla valve pipeline.
As shown in fig. 1, the lowest connecting disc in the left supporting disc is connected with the waste residue collecting tank 18 through a return pipeline 20, the lowest connecting disc in the right supporting disc is connected with the water storage tank 17 through a flushing pipeline 19, and a liquid pump 39 is installed on the flushing pipeline. The structure can be adopted to flush the used flue gas acceleration pipeline, so that the blockage is prevented.
The fifth air outlet of the six-way valve shown in fig. 1 is connected with the connecting disc at the middle position in the right supporting disc through a fourth conveying pipeline 27, the connecting disc at the middle position in the left supporting disc is connected with an exhaust pipeline 28, and the exhaust pipeline and the second flue gas conveying pipeline are converged and then are communicated with the air inlet of the second combustion chamber. According to the invention, the washed flue gas acceleration pipeline can be dried by using the collected heat, and the flowing time of the gas with heat in the flue gas acceleration pipeline is prolonged by using the characteristic of the other obstruction of the Tesla valve pipeline, so that the flue gas acceleration pipeline is ensured to be dried.
Both ends of flue gas acceleration pipe as shown in fig. 5 all are provided with expansion joint, expansion joint constitute by fixed part 5-9, pars contractilis 5-10 and spring 5-11, the one end of fixed part and flue gas acceleration pipe are even as an organic whole, the one end of pars contractilis stretches into to its inside from the other end of fixed part, the pars contractilis stretches into to have the spring between the one end in the fixed part and the flue gas acceleration pipe, the other end of pars contractilis stretches into to the connection pad under the effect of spring in, the pars contractilis keeps away from and extends to have first conical surface on the outer wall of fixed part one end, all extend on the inner wall of connection pad and the outer wall have with first conical surface assorted second conical surface, first conical surface contact with the second conical surface on the connection pad inner wall and seal under the effect of spring.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a miniaturized high concentration pollutes soil dystopy thermal desorption system, includes rotary kiln (2), second combustion chamber (4), dust removal filter (3), heat transfer cooler (7) and desulfurizing tower (9), its characterized in that: the rotary kiln is a small-sized rotary kiln, the second combustion chamber is a bedroom small-sized second combustion chamber, the dust removal filter consists of an active carbon dust removal filter system (3) and a bag-type dust remover (8), a gas outlet of the rotary kiln is communicated with the active carbon dust removal filter system through a first flue gas conveying pipeline (11), the active carbon dust removal filter system is communicated with a gas inlet of the second combustion chamber through a second flue gas conveying pipeline (12), a gas outlet of the second combustion chamber is communicated with a flue gas accelerating device (5) through a third flue gas conveying pipeline (13), the flue gas accelerating device is communicated with a flue gas inlet of a heat exchange cooler through a fourth flue gas conveying pipeline (14), a flue gas outlet of the heat exchange cooler is communicated with the gas inlet of the bag-type dust remover through a fifth flue gas conveying pipeline (15), and a gas outlet of the bag-type dust remover is communicated with a desulfurizing tower through a sixth flue gas conveying pipeline (16), a first air pump (37) is arranged on the sixth flue gas conveying pipeline;
the heat exchange cooler is internally provided with a first heat exchange pipeline and a second heat exchange pipeline which are both in a spiral shape, a heat exchange medium is filled in the heat exchange cooler, the first heat exchange pipeline is contacted with the second heat exchange pipeline through the heat exchange medium, two ends of the first heat exchange pipeline are respectively communicated with a flue gas inlet and a flue gas outlet of the heat exchange cooler, two ends of the second heat exchange pipeline extend out of the heat exchange cooler and are respectively connected with an air inlet pipeline (21) and an air outlet pipeline (22), a second air pump (38) is installed on the air inlet pipeline, a third air pump (40) is installed on the air outlet pipeline, the air outlet pipeline is connected with a six-way valve (10), a first air outlet of the six-way valve is communicated with an auxiliary air inlet of the rotary kiln through a first conveying pipeline (23), and a second gas outlet of the six-way valve is communicated with an auxiliary gas inlet of the second combustion chamber through a second conveying pipeline (24), a third gas outlet of the six-way valve is connected with a hot gas delivery pipeline (25), and a pressure gas pump (41) is installed on the hot gas delivery pipeline.
2. The system of claim 1, wherein the system is characterized in that: the active carbon dust removal and filtration system comprises an installation frame (3-3), a dust removal and filtration box body (3-1), an active carbon regeneration box body (3-2), a first active carbon storage seat (3-10), a first grid plate (3-11), a sealing plate (3-14), a first electric cylinder (3-12), a sealed electric cylinder (3-13) and a translation trolley (3-5), wherein the dust removal and filtration box body is fixed on the installation frame, the lower end of the dust removal and filtration box body is funnel-shaped, a support column (3-7) is vertically arranged at the bottom of the installation frame, the dust removal and filtration box body and the active carbon regeneration box body are connected into a whole from top to bottom, the lower end of the active carbon regeneration box body is also funnel-shaped, the translation trolley is connected on a slide rail (3-6) in a sliding manner, and moves to the position under a discharge port at the bottom of the active carbon regeneration box body along the slide rail, a sealing switch valve (3-4) is installed at a discharge port at the bottom of the activated carbon regeneration box, a flue gas inlet is formed in the side wall at the upper end of the dedusting and filtering box, a flue gas outlet is also formed in the side wall at the lower end of the dedusting and filtering box, the first activated carbon storage seat is fixed on the inner wall of the dedusting and filtering box between the flue gas inlet and the flue gas outlet, a first grid plate is further connected to the bottom of the first activated carbon storage seat in a sliding manner, a first through groove for the first grid plate to extend out is formed in the side wall of the dedusting and filtering box, one end of the first grid plate extends into the first through groove and is connected with a first electric cylinder fixed on the outer wall of the dedusting and filtering box, the flue gas inlet is connected with a first flue gas conveying pipeline, the flue gas outlet is connected with a second flue gas conveying pipeline, and a sealing plate is further movably connected in the dedusting and filtering box below the flue gas outlet, the dust removal filters the box and seals through closing plate and active carbon regeneration box, also seted up on the lateral wall of dust removal filters the box with closing plate assorted second lead to the groove, the one end of closing plate stretches into to the second and leads to the inslot and links to each other with the sealed electronic jar of fixing on the dust removal filters the box outer wall.
3. The system of claim 2, wherein the system is characterized in that: the activated carbon regeneration box body is internally fixed with a second activated carbon storage seat (3-17), the bottom of the second activated carbon storage seat is connected with a second grid plate (3-16) in a sliding manner, a third through groove for the second grid plate to extend out is formed in the side wall of the activated carbon regeneration box body, one end of the second grid plate extends into the third through groove and is connected with a second electric cylinder (3-15) fixed on the outer wall of the activated carbon regeneration box body, a hot air inlet and a cold air inlet are formed in the side wall of the activated carbon regeneration box body above the second activated carbon storage seat, the cold air inlet is connected with a cold air inlet pipeline (33), the hot air inlet is connected with a hot air inlet pipeline (31), a cold air outlet and a hot air outlet are formed in the side wall of the activated carbon regeneration box body below the second activated carbon storage seat, the cold air outlet is connected with a cold air outlet pipeline (32), the hot gas export together be linked together with the air inlet of second combustion chamber after giving vent to anger pipeline (34) and second flue gas pipeline through the hot gas and converge, nitrogen gas import and ammonia import have still been seted up on the lateral wall of the active carbon regeneration box body of cold wind export and hot gas export below, nitrogen gas import and nitrogen gas admission line (35) link to each other, ammonia import and ammonia admission line (36) link to each other.
4. The system of claim 3, wherein the system is characterized in that: the dust removal filter box comprises a first activated carbon storage seat and a second activated carbon storage seat, wherein a plurality of storage channels which are communicated from top to bottom and used for storing activated carbon are formed in the first activated carbon storage seat and the second activated carbon storage seat, the activated carbon in the first activated carbon storage seat is limited in the storage channels of the first activated carbon storage seat through a first grid plate, the activated carbon in the second activated carbon storage seat is limited in the storage channels of the second activated carbon storage seat through a second grid plate, a flow guide cover (3-9) communicated with the top of the dust removal filter box is arranged at the top of the dust removal filter box, the flow guide cover is communicated with an activated carbon bin (3-8) right above the flow guide cover, and the activated carbon in the first activated carbon storage seat is filled through the activated carbon bin.
5. The system of claim 3, wherein the system is characterized in that: and a fourth air outlet of the six-way valve is connected with an air inlet of a heating device (29) through a third conveying pipeline (26), a hot air inlet pipeline is connected with an air outlet of the heating device, and one end of the third conveying pipeline, close to the heating device, is also connected with a hot air supplementing pipeline (30).
6. The system of claim 5, wherein the system is characterized in that: the heating device comprises a heating box body (29-1), electric heating pipes (29-4), a first partition plate (29-2) and a second partition plate (29-3), wherein a plurality of first partition plates and a plurality of second partition plates are sequentially arranged in the heating box body from left to right, the first partition plates and the second partition plates are arranged in a staggered manner, the first partition plates are more than the second partition plates, the electric heating pipes are respectively arranged in the heating box body between the adjacent first partition plates and the second partition plates, the upper end and the front and rear outer walls of the first partition plates are respectively contacted with the top wall and the front and rear inner walls in the heating box body, a gap is reserved between the lower end of the first partition plate and the bottom in the heating box body, and the lower end and the front and rear outer walls of the second partition plates are respectively contacted with the bottom and the front and rear inner walls in the heating box body, and a gap is reserved between the upper end of the second partition plate and the top wall in the heating box body.
7. The system of claim 1, wherein the system is characterized in that: the smoke accelerating device comprises three smoke accelerating pipelines (5-1), a left supporting disk (5-2), a right supporting disk (5-3), turntables (5-4), servo motors (5-5) and rotating shafts (5-6), wherein the three smoke accelerating pipelines are Tesla valve pipelines, the turntables are provided with two blocks, regular triangles of the three smoke accelerating pipelines are arranged between the two turntables, two ends of the smoke accelerating pipelines respectively penetrate through the turntables on two sides, the left supporting disk and the right supporting disk are oppositely arranged and are provided with circular grooves used for being connected with the turntables on one side, the two turntables are respectively and rotatably connected in the circular grooves of the left supporting disk and the right supporting disk, the servo motors are arranged on the outer wall of the left supporting disk and are connected with the rotating shafts of the servo motors, the rotating shafts extend into the circular grooves of the left supporting disk and are connected with the turntable in the circular groove of the left supporting disk, three flue gas acceleration pipes are rotatory along with the carousel under servo motor's drive, left side supporting disk with all be provided with three connection pad (5-7) relatively in the circular recess of right side supporting disk, through-hole (5-8) have all been seted up to the center department of connection pad, and three connection pad also is regular triangle and arranges in the same circular recess, flue gas acceleration pipe along with rotatory in proper order with the circular recess of both sides in three connection pad link to each other, the connection pad of top is linked together with third flue gas pipeline in the left side supporting disk, the connection pad of top is linked together with fourth flue gas pipeline in the supporting disk of the right side.
8. The system of claim 7, wherein the system is characterized in that: the bottom connecting disc in the left supporting disc is connected with a waste residue collecting box (18) through a return pipe (20), the bottom connecting disc in the right supporting disc is connected with a water storage tank (17) through a flushing pipe (19), and a liquid pump (39) is installed on the flushing pipe.
9. The system of claim 7, wherein the system is characterized in that: and a fifth air outlet of the six-way valve is connected with a connecting disc at the middle position in the right supporting disc through a fourth conveying pipeline (27), the connecting disc at the middle position in the left supporting disc is connected with an exhaust pipeline (28), and the exhaust pipeline and the second flue gas conveying pipeline are converged and then are communicated with an air inlet of the second combustion chamber.
10. A miniaturized ex situ thermal desorption system for highly concentrated contaminated soil according to any one of claims 7-9, wherein: the both ends of pipeline are all provided with expansion joint with higher speed to the flue gas, expansion joint constitute by fixed part (5-9), pars contractilis (5-10) and spring (5-11), the one end of fixed part and the pipeline is even integrative with higher speed to the flue gas, the one end of pars contractilis stretches into to its inside from the other end of fixed part, the pars contractilis stretches into one end in the fixed part and the flue gas and extends to between the pipeline with higher speed to have the spring, the other end of pars contractilis stretches into to the connection pad under the effect of spring in, the pars contractilis keeps away from and extends to have first toper face on the outer wall of fixed part one end, all extend on the inner wall of connection pad and the outer wall have with first toper face assorted second toper face, first toper face contact with the second toper face on the connection pad inner wall under the effect of spring and seal.
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| CN202111157259.3A CN113941593B (en) | 2021-09-30 | 2021-09-30 | Miniaturized high concentration pollutes soil dystopy thermal desorption system |
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