CN112547781A - Device and method for controlling soil odor by using thermal desorption auxiliary agent - Google Patents
Device and method for controlling soil odor by using thermal desorption auxiliary agent Download PDFInfo
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- CN112547781A CN112547781A CN202011373408.5A CN202011373408A CN112547781A CN 112547781 A CN112547781 A CN 112547781A CN 202011373408 A CN202011373408 A CN 202011373408A CN 112547781 A CN112547781 A CN 112547781A
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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
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/13—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and combined with sifting devices, e.g. for making powdered fuel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/282—Shape or inner surface of mill-housings
- B02C13/284—Built-in screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/286—Feeding or discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
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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
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/286—Feeding or discharge
- B02C2013/28618—Feeding means
Abstract
The invention provides a device and a method for controlling soil odor by utilizing a thermal desorption auxiliary agent, wherein the device comprises a device main body, a soil pretreatment device, a thermal desorption auxiliary agent desorption device, an odor treatment device, a thermal circulation device and a control device, the soil pretreatment device comprises a feeding device, a crushing and screening device and a spraying device, the thermal desorption device comprises a thermal desorption chamber, a heating base and an air heating device, the thermal desorption auxiliary agent desorption device comprises a rotating motor, a hydraulic lifting rod and a desorption rotary seat, the desorption rotary seat is used for stirring the soil in the thermal desorption chamber and introducing heating air into the soil, the odor treatment device comprises a treatment tank arranged on the side wall of the device main body, and the treatment tank is sequentially divided into a dehydration layer, a decomposition layer and an adsorption layer from top to bottom. In a word, the invention has the advantages of novel structure, simple operation, safety, high efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of soil treatment, and particularly relates to a device and a method for controlling soil odor by using a thermal desorption auxiliary agent.
Background
With the rapid development of the production and life of the human industry and agriculture, the living standard of people is improved, meanwhile, the increasingly serious problem of environmental pollution, especially the problem of site pollution, is generated, and the ecological risk and the human health risk must be sufficiently known. Therefore, from the perspective of social sustainable development, harmonious development of people and nature, and maintaining the health of people, contaminated sites should be actively controlled, reduced, and finally eliminated. And meanwhile, the compound pollution in the environment is also warned.
At present, the environmental pollution faced by China mainly comprises three aspects of atmosphere, water and soil. Taking soil pollution as an example, from the first national soil pollution condition investigation of China, the national soil environment condition is not optimistic overall, part of areas have heavy soil pollution, the quality of the cultivated land soil environment is great, and the soil environment problem of the industrial and mining abandoned field is prominent. The high background value of soil pollution and artificial activities in the industrial and mining industry, agriculture and the like are main causes of soil pollution or exceeding standards.
Soil is an important component of the environment, not only providing habitat for plants, animals and microorganisms, but also being the basis for human agricultural production. The soil environment is located in the central position of the natural environment, approximately 90% of pollutants from all aspects in the environment are borne, and with the rapid development of economy, more and more pollutants enter the soil environment to pollute the soil environment. Soil pollution not only can directly lead to the yield reduction of grains and economic crops, but also can influence human health through eating agricultural products, and even cause adverse stress and harm on a plurality of layers to the ecological environment on which human beings live through the migration of polluted underground water. Soil pollution is directly related to the safe production of crops. Crops flow into the market, and in order to keep the production safety of Chinese grains, for the existence of soil pollution, the government and related departments need to strengthen prevention and control measures, mainly treat the polluted soil, recover the soil layer structure and ensure the safety of the grain crops.
At present, the removal of the peculiar smell in the soil is an urgent problem to be solved, and the traditional soil peculiar smell removal method is long in time consumption, low in efficiency and often accompanied by high cost, so that the invention designs a device and a method for controlling the peculiar smell of the soil by using a thermal desorption auxiliary agent.
Disclosure of Invention
Aiming at the problems, the invention provides a device and a method for controlling soil odor by using a thermal desorption auxiliary agent.
The technical scheme of the invention is as follows: a device for controlling soil odor by utilizing thermal desorption auxiliary agent mainly comprises a device main body, a soil pretreatment device, a thermal desorption auxiliary agent desorption device, an odor treatment device, a thermal circulation device and a control device,
the device main body is fixedly arranged on the horizontal ground, the soil pretreatment device is arranged on the upper part of the device main body and comprises a feeding device for adding soil into the device main body, a crushing and screening device connected to the outlet end of the feeding device and used for crushing and screening the soil in the device main body, and a spraying device connected to the soil outlet end below the crushing and screening device, wherein the spraying device is used for spraying thermal desorption auxiliary agent solution to the crushed soil,
the thermal desorption device is connected below the spray device and comprises a thermal desorption chamber for containing the soil after spraying the thermal desorption auxiliary agent solution, a heating base arranged at the bottom in the thermal desorption chamber and used for introducing hot air into the thermal desorption chamber, and an air heating device arranged outside the thermal desorption chamber and communicated with the heating base, the upper end of the thermal desorption chamber is also provided with an exhaust port for exhausting the gas in the thermal desorption chamber,
the thermal desorption auxiliary agent desorption device comprises a rotating motor arranged at the top in the thermal desorption chamber, a hydraulic lifting rod connected to a rotating shaft at the lower end of the rotating motor, and a desorption rotary seat connected to the lower end of the hydraulic lifting rod, wherein the desorption rotary seat is used for stirring the soil in the thermal desorption chamber and introducing heated air into the soil,
the peculiar smell treatment device comprises a treatment tank arranged on the side wall of the device body, the top end of the treatment tank is connected with the exhaust port, the treatment tank is sequentially divided into a dehydration layer for removing water in exhaust gas of the exhaust port, a decomposition layer for decomposing peculiar smell in the exhaust gas through a decomposing agent and an adsorption layer for adsorbing residual peculiar smell through activated carbon from top to bottom,
the thermal circulation device is arranged on the side wall of the device body below the peculiar smell treatment device, the thermal circulation device comprises a gas pump connected with an exhaust port at the lower end of the treatment tank, the gas pump is also connected with the air heating device and is used for pumping residual hot gas discharged by the treatment tank into the air heating device for cyclic utilization,
the control device is arranged on the outer side wall of the device main body and is respectively connected with the soil pretreatment device, the thermal desorption auxiliary agent desorption device, the peculiar smell treatment device and the thermal circulation device through the relay control.
Further, feed arrangement is including setting up at the left feeder hopper in device main part top, movable sealing connects the soil pre-installation bucket that is used for adding soil in to the feeder hopper on the feeder hopper and the fixed scraper that sets up and be used for scraping out pre-installation soil in the soil pre-installation bucket, the scraper includes that the scraper motor at the feeder hopper middle part is fixed through the dead lever and connects the epaxial scraper of scraper motor upper end output through rotatory lifter, ordinary direct reinforced mode can make the peculiar smell diffusion in the soil, this feed arrangement can not take place the loss of soil peculiar smell at the feeding in-process, avoid the polluted environment.
Further, crushing and screening device is including the crushing and screening cylinder that is used for receiving feed arrangement discharge soil, the equidistance sets up the multiunit crushing impeller in the crushing and screening cylinder, the setting is used for rotatory crushing and screening cylinder's driving motor one on crushing and screening cylinder right side, the setting is used for rotatory crushing impeller's driving motor two and connects two cone funnels that are used for collecting crushing and screening back soil in crushing and screening cylinder below in crushing and screening cylinder left side, both can continuously carry out the breakage to soil, until reaching broken standard, again can sieve out the impurity that can not be broken in the soil.
Further, spray set is used for through the spray piping of broken screening back soil including connecting two cone funnel below respectively, evenly set up the inside atomizing nozzle that is used for spraying thermal desorption auxiliary agent atomized solution to soil at the spray piping pipe wall, the setting is used for providing the solution tank of thermal desorption auxiliary agent solution to atomizing nozzle in the middle of two spray piping, the solution tank communicates through two liquid pumps and the atomizing nozzle on two spray piping respectively, spray thermal desorption auxiliary agent solution in to soil, can be at the desorption of thermal desorption in-process acceleration soil peculiar smell.
Further, atomizing nozzle's the even oblique upwards 30-60 of direction that sprays, atomizing nozzle direction slope upwards both can cushion falling soil, makes soil soak thermal desorption auxiliary agent solution completely, can retrieve the thermal desorption auxiliary agent solution that the spray pipe inner wall condensate flows down again to atomizing nozzle in, avoids thermal desorption auxiliary agent solution volume too much, causes air heating device's too big load.
Furthermore, air nozzles which are communicated with the air heating device and used for spraying heating air into soil are uniformly arranged on the heating base, the air nozzles are all inverted J-shaped, and the air spraying direction of the air nozzles is downward.
Further, the inside main trachea that is equipped with the air heating device intercommunication of hydraulic lifting rod, desorption revolve the seat and include a plurality of bronchus with main trachea connection, bronchus lower surface equidistance is equipped with the adsorption head, the adsorption head includes and is arranged in the jet-propelled pipe that lets in heated air in to soil with the bronchus intercommunication and encircles the adsorption tube that sets up and be arranged in absorbing peculiar smell in soil through filling thermal desorption auxiliary agent at the jet-propelled pipe lower extreme, desorption revolve the seat both can stir soil, can assist the desorption of soil peculiar smell again.
The method for controlling the soil odor by using the device mainly comprises the following steps:
s1: soil pretreatment
In soil pre-installation bucket is gone into in advance to soil that will need to handle, install soil pre-installation bucket back-off on the feeder hopper, start the scraper device, the scraper rotates to soil pre-installation bucket internal top under the drive of scraper motor and rotatory lifter, rotate in-process and scrape soil to the feeder hopper, the feeder hopper transmits soil to the crushing and screening cylinder of crushing and screening device in, rotatory motor one drives the crushing and screening cylinder and makes clockwise rotation, rotatory motor two drive crushing impeller and make anticlockwise rotation in the crushing and screening cylinder, with soil breakage, soil after the screening of crushing and screening cylinder lower part screen cloth falls into spray piping through conical hopper in, soil sprays in spray piping behind the thermal desorption auxiliary agent solution and gets into the indoor thermal desorption room of thermal desorption device
S2: thermal desorption
The pretreated soil is collected in a thermal desorption chamber, an air heating device continuously provides heated air for the soil through an air nozzle of a heating base, the peculiar smell in the soil is discharged out of the soil under the treatment of the heated air, and the thermal desorption auxiliary agent solution sprayed in the soil assists in discharging the peculiar smell in the soil;
s3: auxiliary thermal desorption
In the thermal desorption treatment process, the desorption rotary seat of the thermal desorption auxiliary agent desorption device is lowered into soil to rotate every 15min, the soil is stirred by the rotation of the desorption rotary seat, so that peculiar smell in the soil at the bottom is rapidly discharged, the adsorption head of the desorption rotary seat sprays heated air into the soil, meanwhile, the peculiar smell in the soil is adsorbed by the adsorption pipe, the desorption rotary seat is lifted to the upper part of the thermal desorption chamber after auxiliary treatment is carried out for 5min, and the heated air sprayed by the air spray pipe is used for heating and discharging the peculiar smell of the soil adsorbed by the adsorption pipe, so that the next adsorption is facilitated;
s4: odor treatment
The hot gas with soil odor in the thermal desorption chamber is exhausted into the odor treatment tank through the exhaust port, the odor treatment tank removes moisture in the hot gas through a dehydrating agent in a dehydrating layer, decomposes the soil odor in the hot gas through a decomposing agent in a decomposing layer, finally adsorbs residual odor which is not decomposed through activated carbon in an adsorption layer, and the hot gas exhausted by the odor treatment tank is circulated to the air heating device through a gas pump of the thermal circulation device for recycling.
The invention has the beneficial effects that: the invention provides a device for controlling soil odor by utilizing a thermal desorption auxiliary agent, which is particularly suitable for controlling soil odor with overlarge soil odor, and is characterized in that an automatic feeding device is arranged to avoid the dissipation of the soil odor in the feeding process, a crushing and screening device is arranged to continuously crush the soil until the soil odor reaches the crushing standard and screen impurities which cannot be crushed in the soil, a spraying device is also arranged to spray a thermal desorption auxiliary agent solution into the soil to accelerate the removal of the soil odor in the thermal desorption process, an air nozzle of a heating base at the bottom of a thermal desorption chamber is arranged to be in an inverted J shape to avoid the blockage of the air nozzle by soil particles, the thermal desorption auxiliary agent desorption device is arranged to periodically stir and ventilate the soil to assist in deodorization, the soil odor removal efficiency is accelerated, an odor treatment device and a thermal circulation device are also arranged, the removed soil peculiar smell is decomposed and adsorbed, and the discharged hot gas is recycled. In a word, the invention has the advantages of novel structure, simple operation, safety, high efficiency and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the feed apparatus of the present invention;
FIG. 3 is a schematic view of the construction of the crushing and screening device of the present invention;
FIG. 4 is a schematic view of the spray pipe configuration of the present invention;
FIG. 5 is a schematic view of the desorption rotary base of the present invention;
FIG. 6 is a schematic view of a structure of a suction head according to the present invention.
Wherein, 1-the main body of the device, 2-the soil pretreatment device, 21-the feeding device, 211-the feed hopper, 212-the soil pre-loading barrel, 213-the soil scraping device, 2131-the fixing rod, 2132-the soil scraping motor, 2133-the rotary lifting rod, 2134-the soil scraping plate, 22-the crushing and screening device, 221-the crushing and screening roller, 222-the crushing impeller, 223-the driving motor I, 224-the driving motor II, 225-the cone funnel, 23-the spray device, 231-the spray pipe, 232-the atomizing nozzle, 233-the solution tank, 234-the liquid pump, 3-the thermal desorption device, 31-the thermal desorption chamber, 32-the heating base, 321-the air nozzle, 33-the air heating device, 34-the exhaust port, 4-the thermal desorption auxiliary agent desorption device, 41-rotating motor, 42-hydraulic lifting rod, 421-main gas pipe, 43-desorption rotary base, 431-branch gas pipe, 432-adsorption head, 4321-gas injection pipe, 4322-adsorption pipe, 5-peculiar smell treatment device, 51-treatment tank, 511-dehydration layer, 512-decomposition layer, 513-adsorption layer, 6-thermal cycle device, 61-gas pump and 7-control device.
The soil scraping motor 2132 can be selected, the first driving motor and the second driving motor can be selected, the liquid pump 234 can be selected, the air heating device 33 can be selected, the rotating motor 41 can be selected, the rotating lifting rod 2133 and the pressure lifting rod 42 can be selected, the gas pump 61 can be selected, the control device 7 can be selected, the dehydrating agent can be selected, the decomposing agent can be selected, the thermal desorption auxiliary agent can be selected, and other electronic elements which are not specially described can be selected from commercially available common products as long as the use requirements of the invention can be met.
Detailed Description
For the convenience of understanding the technical scheme of the present invention, the present invention is further explained with reference to the accompanying fig. 1 to 6 and the specific embodiments, which are not to be construed as limiting the scope of the present invention.
Example (b): as shown in figure 1, the device for controlling the soil odor by utilizing the thermal desorption auxiliary agent mainly comprises a device main body 1, a soil pretreatment device 2, a thermal desorption device 3, a thermal desorption auxiliary agent desorption device 4, an odor treatment device 5, a thermal circulation device 6 and a control device 7,
the device main body 1 is fixedly arranged on the horizontal ground, the soil pretreatment device 2 is arranged on the upper portion of the device main body 1, the soil pretreatment device 2 comprises a feeding device 21 for adding soil into the device main body 1, a crushing and screening device 22 connected to the outlet end of the feeding device 21 and used for crushing and screening the soil entering the device main body 1, and a spraying device 23 connected to the soil outlet end below the crushing and screening device 22, the spraying device 23 is used for spraying thermal desorption auxiliary agent solution to the crushed soil,
as shown in fig. 2, the feeding device 21 includes a feeding hopper 211 provided at the left side of the top end of the device body 1, a soil pre-loading barrel 212 movably and hermetically coupled to the feeding hopper 211 for adding soil into the feeding hopper 211, and a soil scraping device 213 fixedly provided in the feeding hopper 211 for scraping the pre-loaded soil in the soil pre-loading barrel 212, the soil scraping device 213 includes a soil scraping motor 2132 fixed to the middle of the feeding hopper 211 by a fixing rod 2131 and a soil scraping plate 2134 connected to an output shaft at the upper end of the soil scraping motor 2132 by a rotating elevating rod 2133,
as shown in fig. 3, the crushing and screening device 22 comprises a crushing and screening drum 221 for receiving soil discharged from the feeding device 2, a plurality of groups of crushing and screening impellers 222 equidistantly arranged in the crushing and screening drum 221, a first driving motor 223 arranged at the right side of the crushing and screening drum 221 for rotating the crushing and screening drum 221, a second driving motor 224 arranged at the left side of the crushing and screening drum 221 for rotating the crushing and screening impellers 222, and two conical hoppers 225 connected below the crushing and screening drum 221 for collecting the crushed and screened soil,
the spraying device 23 comprises spraying pipes 231 respectively connected below the two conical funnels 225 and used for sieving the soil through crushing, atomizing nozzles 232 uniformly arranged inside the pipe walls of the spraying pipes 231 and used for spraying thermal desorption auxiliary agent atomized solution to the soil, and a solution tank 233 arranged between the two spraying pipes 231 and used for providing thermal desorption auxiliary agent solution to the atomizing nozzles 232, wherein the solution tank 233 is respectively communicated with the atomizing nozzles 232 on the two spraying pipes 231 through two liquid pumps 234, the spraying directions of the atomizing nozzles 232 are both 45 degrees upwards in an inclined manner, as shown in fig. 4,
the thermal desorption device 3 is connected below the spray device 23, the thermal desorption device 3 comprises a thermal desorption chamber 31 for containing soil after spraying thermal desorption auxiliary agent solution, a heating base 32 arranged at the bottom in the thermal desorption chamber 31 and used for introducing hot air into the thermal desorption chamber 31, and an air heating device 33 arranged at the outer side of the thermal desorption chamber 31 and communicated with the heating base 32, the upper end of the thermal desorption chamber 31 is also provided with an exhaust port 34 used for exhausting gas in the thermal desorption chamber 31, the heating base 32 is uniformly provided with air nozzles 321 communicated with the air heating device 33 and used for spraying heating air into the soil, the air nozzles 321 are all inverted J-shaped, and the air spraying direction of the air nozzles 321 is downward,
the thermal desorption auxiliary agent desorption device 4 comprises a rotating motor 41 arranged at the top in the thermal desorption chamber 31, a hydraulic lifting rod 42 connected to a rotating shaft at the lower end of the rotating motor 41, and a desorption rotary seat 43 connected to the lower end of the hydraulic lifting rod 42, wherein the desorption rotary seat 43 is used for stirring the soil in the thermal desorption chamber 31 and introducing heated air into the soil, a main air pipe 421 communicated with the air heating device 33 is arranged in the hydraulic lifting rod 42, the desorption rotary seat 43 comprises a plurality of branch air pipes 431 connected with the main air pipe 421, adsorption heads 432 are equidistantly arranged on the lower surfaces of the branch air pipes 431, each adsorption head 432 comprises an air injection pipe 4321 communicated with the branch air pipe 431 and used for introducing heated air into the soil and an adsorption pipe 4322 arranged at the lower end of the air injection pipe 4321 in a surrounding manner and used for adsorbing peculiar smell in the soil by filling thermal desorption auxiliary agents, as shown in,
the peculiar smell processing device 5 comprises a processing tank 51 arranged on the side wall of the device main body 1, the top end of the processing tank 51 is connected with the air vent 34, the processing tank 51 is divided into a dehydration layer 511 for removing the moisture in the air discharged from the air vent 34, a decomposition layer 512 for decomposing peculiar smell in the discharged air by a decomposing agent and an adsorption layer 513 for adsorbing residual peculiar smell by activated carbon from top to bottom in sequence,
the thermal circulation device 6 is arranged on the side wall of the device body 1 below the peculiar smell processing device 5, the thermal circulation device 6 comprises a gas pump 61 connected with an exhaust port at the lower end of the processing tank 51, the gas pump 61 is also connected with the air heating device 33 and is used for pumping residual hot gas discharged from the processing tank 51 into the air heating device 33 for cyclic utilization,
the control device 7 is arranged on the outer side wall of the device main body 1, and the control device 7 is respectively connected with the soil pretreatment device 2, the thermal desorption device 3, the thermal desorption auxiliary agent desorption device 4, the peculiar smell treatment device 5 and the thermal circulation device 6 through the relay control.
The method for controlling the soil odor by using the embodiment mainly comprises the following steps:
s1: soil pretreatment
The soil to be treated is pre-loaded into a soil pre-loading barrel 212, the soil pre-loading barrel 212 is reversely buckled and installed on a feed hopper 211, a soil scraping device 213 is started, a soil scraping plate 2134 is driven by a soil scraping motor 2132 and a rotary lifting rod 2133 to rotate towards the top of the interior of the soil pre-loading barrel 212, soil is scraped into the feed hopper 211 in the rotating process, the soil is transmitted into a crushing and screening roller 221 of a crushing and screening device 22 by the feed hopper 211, the crushing and screening roller 221 is driven by a first rotary motor 223 to rotate clockwise, a crushing impeller 222 is driven by a second rotary motor 224 to rotate anticlockwise in the crushing and screening roller 221, the soil after being screened is screened by a screen mesh at the lower part of the crushing and screening roller 221 and then falls into a spray pipeline 231 through a conical funnel 225, the soil after being sprayed with a thermal desorption auxiliary agent solution in the spray pipeline 231 enters a thermal desorption chamber 31 of a thermal desorption device
S2: thermal desorption
The pretreated soil is collected in the thermal desorption chamber 31, the air heating device 33 continuously provides heated air for the soil through the air nozzle 321 of the heating base 32, the peculiar smell in the soil is discharged out of the soil under the treatment of the heated air, and the thermal desorption auxiliary agent solution sprayed in the soil assists in discharging the peculiar smell of the soil;
s3: auxiliary thermal desorption
In the thermal desorption treatment process, the desorption rotary seat 43 of the thermal desorption auxiliary agent desorption device 4 is lowered into soil to rotate at intervals of 15min, the soil is stirred by the rotation of the desorption rotary seat 43, so that peculiar smell in the soil at the bottom is rapidly discharged, the adsorption head of the desorption rotary seat 43 sprays heated air into the soil, the peculiar smell in the soil is adsorbed by the adsorption pipe 4322, the desorption rotary seat 43 is lifted to the upper part of the thermal desorption chamber 31 after auxiliary treatment is carried out for 5min, the heated air sprayed by the air spray pipe 4321 is used for heating and discharging the peculiar smell adsorbed by the adsorption pipe 4322, and the next adsorption is facilitated;
s4: odor treatment
The hot gas with soil odor in the heat desorption chamber 31 is discharged into the odor treatment tank 5 through the exhaust port 34, the odor treatment tank 5 removes moisture in the hot gas through the dehydrating agent in the dehydrating layer 511, decomposes the soil odor in the hot gas through the decomposing agent in the decomposing layer 512, finally adsorbs residual odor which is not decomposed through the activated carbon of the adsorption layer, and the hot gas discharged from the odor treatment tank 5 is circulated to the air heating device 33 through the gas pump 61 of the heat circulating device 6 for reuse.
Claims (8)
1. A device for controlling soil odor by utilizing thermal desorption auxiliary agent is characterized by mainly comprising a device main body (1), a soil pretreatment device (2), a thermal desorption device (3), a thermal desorption auxiliary agent desorption device (4), an odor treatment device (5), a thermal circulation device (6) and a control device (7),
the device main body (1) is fixedly installed on the horizontal ground, the soil pretreatment device (2) is arranged on the upper portion of the device main body (1), the soil pretreatment device (2) comprises a feeding device (21) used for adding soil into the device main body (1), a crushing and screening device (22) connected to the outlet end of the feeding device (21) and used for crushing and screening the soil in the device main body (1), and a spraying device (23) connected to the soil outlet end below the crushing and screening device (22), the spraying device (23) is used for spraying thermal desorption auxiliary agent solution to the crushed soil,
the thermal desorption device (3) is connected below the spray device (23), the thermal desorption device (3) comprises a thermal desorption chamber (31) for containing soil after spraying thermal desorption auxiliary agent solution, a heating base (32) arranged at the bottom in the thermal desorption chamber (31) and used for introducing hot air into the thermal desorption chamber (31), and an air heating device (33) arranged outside the thermal desorption chamber (31) and communicated with the heating base (32), the upper end of the thermal desorption chamber (31) is also provided with an exhaust port (34) for exhausting gas in the thermal desorption chamber (31),
the thermal desorption auxiliary agent desorption device (4) comprises a rotating motor (41) arranged at the inner top of the thermal desorption chamber (31), a hydraulic lifting rod (42) connected to a rotating shaft at the lower end of the rotating motor (41), and a desorption rotary seat (43) connected to the lower end of the hydraulic lifting rod (42), wherein the desorption rotary seat (43) is used for stirring soil in the thermal desorption chamber (31) and introducing heated air into the soil,
the peculiar smell treatment device (5) comprises a treatment tank (51) arranged on the side wall of the device main body (1), the top end of the treatment tank (51) is connected with the exhaust port (34), the treatment tank (51) is sequentially divided into a dehydration layer (511) for removing moisture in the exhaust gas of the exhaust port (34), a decomposition layer (512) for decomposing peculiar smell in the exhaust gas through a decomposition agent and an adsorption layer (513) for adsorbing residual peculiar smell through activated carbon from top to bottom,
the heat circulating device (6) is arranged on the side wall of the device main body (1) below the peculiar smell processing device (5), the heat circulating device (6) comprises a gas pump (61) connected with an exhaust port at the lower end of the processing tank (51), the gas pump (61) is also connected with the air heating device (33) and is used for pumping residual heat gas exhausted from the processing tank (51) into the air heating device (33) for cyclic utilization,
the device is characterized in that the control device (7) is arranged on the outer side wall of the device main body (1), and the control device (7) is respectively connected with the soil pretreatment device (2), the thermal desorption device (3), the thermal desorption auxiliary agent desorption device (4), the peculiar smell treatment device (5) and the thermal circulation device (6) through a relay in a control mode.
2. The device for controlling the soil odor by using the thermal desorption auxiliary agent as claimed in claim 1, wherein the feeding device (21) comprises a feeding hopper (211) arranged on the left side of the top end of the device body (1), a soil pre-loading barrel (212) movably and hermetically connected to the feeding hopper (211) and used for adding soil into the feeding hopper (211), and a soil scraping device (213) fixedly arranged in the feeding hopper (211) and used for scraping the pre-loaded soil in the soil pre-loading barrel (212), wherein the soil scraping device (213) comprises a soil scraping motor (2132) fixed in the middle of the feeding hopper (211) through a fixing rod (2131) and a soil scraping plate (2134) connected to an output shaft at the upper end of the soil scraping motor (2132) through a rotating lifting rod (2133).
3. The device for controlling soil odor by using thermal desorption auxiliary agent according to claim 1, wherein the crushing and screening device (22) comprises a crushing and screening drum (221) for receiving the soil discharged by the feeding device (2), a plurality of groups of crushing and screening impellers (222) equidistantly arranged in the crushing and screening drum (221), a first driving motor (223) arranged at the right side of the crushing and screening drum (221) for rotating the crushing and screening drum (221), a second driving motor (224) arranged at the left side of the crushing and screening drum (221) for rotating the crushing and screening impellers (222), and two conical hoppers (225) connected below the crushing and screening drum (221) for collecting the crushed and screened soil.
4. The device for controlling soil odor using thermal desorption auxiliary agent according to claim 4, wherein the spraying directions of the atomizing nozzles (232) are all inclined upwards by 45 degrees.
5. The device for controlling the odor of soil by using thermal desorption auxiliary agents according to claim 3, wherein the spraying device (23) comprises spraying pipes (231) respectively connected below the two conical hoppers (225) and used for sieving the screened soil by crushing, atomizing nozzles (232) uniformly arranged inside the pipe walls of the spraying pipes (231) and used for spraying the atomized solution of the thermal desorption auxiliary agents to the soil, and a solution tank (233) arranged between the two spraying pipes (231) and used for providing the atomized solution of the thermal desorption auxiliary agents to the atomizing nozzles (232), and the solution tank (233) is respectively communicated with the atomizing nozzles (232) on the two spraying pipes (231) through two liquid pumps (234).
6. The device for controlling soil odor using thermal desorption auxiliary agent according to claim 4, wherein the spraying direction of the atomizing nozzles (232) is inclined upwards by 30-60 degrees.
7. The device for controlling the soil odor by using the thermal desorption auxiliary agent according to claim 1, wherein a main air pipe (421) communicated with the air heating device (33) is arranged inside the hydraulic lifting rod (42), the desorption rotary base (43) comprises a plurality of branch air pipes (431) connected with the main air pipe (421), adsorption heads (432) are arranged on the lower surfaces of the branch air pipes (431) at equal intervals, and each adsorption head (432) comprises an air injection pipe (4321) communicated with the branch air pipes (431) and used for introducing heated air into the soil and an adsorption pipe (4322) arranged at the lower end of the air injection pipe (4321) in a surrounding manner and used for adsorbing the odor in the soil by filling the thermal desorption auxiliary agent.
8. A method for soil odor control using the apparatus of any one of claims 1 to 7, comprising the steps of:
s1: soil pretreatment
The method comprises the steps that soil to be treated is pre-loaded into a soil pre-loading barrel (212), the soil pre-loading barrel (212) is installed on a feeding hopper (211) in a reverse buckling mode, a soil scraping device (213) is started, a soil scraping plate (2134) is driven by a soil scraping motor (2132) and a rotary lifting rod (2133) to rotate towards the top of the interior of the soil pre-loading barrel (212), soil is scraped into the feeding hopper (211) in the rotating process, the feeding hopper (211) transmits the soil into a crushing and screening roller (221) of a crushing and screening device (22), a first rotating motor (223) drives the crushing and screening roller (221) to rotate clockwise, a second rotating motor (224) drives a crushing impeller (222) to rotate anticlockwise in the crushing and screening roller (221), the soil is crushed, the sieved soil falls into a spraying pipeline (231) through a conical hopper (225) after being sieved through a lower screen of the crushing and the lower portion of the crushing and screening roller (221), and the soil enters a thermal desorption device (3) after being sprayed with thermal desorption solution in the spraying pipeline (231), and in the desorption chamber (31)
S2: thermal desorption
The pretreated soil is collected in a thermal desorption chamber (31), an air heating device (33) continuously provides heated air for the soil through an air nozzle (321) of a heating base (32), the peculiar smell in the soil is discharged out of the soil under the treatment of the heated air, and the thermal desorption auxiliary agent solution sprayed in the soil assists in discharging the peculiar smell of the soil;
s3: auxiliary thermal desorption
In the thermal desorption treatment process, the desorption rotary seat (43) of the thermal desorption auxiliary agent desorption device (4) is lowered into soil to rotate at intervals of 15min, the soil is stirred by the rotation of the desorption rotary seat (43), so that peculiar smell in the soil at the bottom is rapidly discharged, an adsorption head of the desorption rotary seat (43) sprays heated air into the soil, meanwhile, an adsorption pipe (4322) is used for adsorbing peculiar smell in the soil, the desorption rotary seat (43) rises to the upper part of the thermal desorption chamber (31) after auxiliary treatment is carried out for 5min, the heated air sprayed by an air spraying pipe (4321) is used for heating and discharging the peculiar smell adsorbed by the adsorption pipe (4322), and the next adsorption is facilitated;
s4: odor treatment
The hot gas with soil odor in the heat desorption chamber (31) is discharged into the odor treatment tank (5) through the exhaust port (34), the odor treatment tank (5) removes water in the hot gas through a dehydrating agent in a dehydrating layer (511), the soil odor in the hot gas is decomposed through a decomposing agent in a decomposing layer (512), finally, the undecomposed residual odor is adsorbed through activated carbon of an adsorbing layer, and the hot gas discharged from the odor treatment tank (5) is circulated to the air heating device (33) through a gas pump (61) of a heat circulating device (6) for recycling.
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| CN112547781B (en) | 2022-03-15 |
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