CN110772953A - Peculiar smell control system for digging operation in organic pollution site - Google Patents

Peculiar smell control system for digging operation in organic pollution site Download PDF

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Publication number
CN110772953A
CN110772953A CN201911166110.4A CN201911166110A CN110772953A CN 110772953 A CN110772953 A CN 110772953A CN 201911166110 A CN201911166110 A CN 201911166110A CN 110772953 A CN110772953 A CN 110772953A
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fan
odor
control system
peculiar smell
module
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CN201911166110.4A
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苗竹
任贝
闾文景
倪鑫鑫
吕正勇
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Beijing Geoenviron Engineering and Technology Inc
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Beijing Geoenviron Engineering and Technology Inc
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Priority to CN201911166110.4A priority Critical patent/CN110772953A/en
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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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
    • A61L9/145—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes air-liquid contact processes, e.g. scrubbing
    • 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
    • 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
    • B01D53/0454—Controlling adsorption
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/346—Controlling the process
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/44—Organic components
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/21—Use of chemical compounds for treating air or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/21—Use of chemical compounds for treating air or the like
    • A61L2209/211—Use of hydrogen peroxide, liquid and vaporous
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/106—Peroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/108—Halogens or halogen compounds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708

Abstract

The invention discloses an odor control system for dredging operation of an organic pollution site, which comprises: the adsorption module comprises an adsorption device and a first fan, wherein the first fan is connected with the adsorption device and used for sucking the peculiar smell gas into the adsorption device, so that the peculiar smell gas is filtered by the adsorption device and then is discharged; the spraying module comprises a liquid medicine box, a pump and an atomizing nozzle which are connected in sequence, wherein the liquid medicine box is filled with the peculiar smell eliminating agent, and the pump can spray the peculiar smell eliminating agent in the liquid medicine box into the air through the atomizing nozzle so as to eliminate peculiar smell in the air; the separation module comprises a medicament box, a second fan and an air cylinder which are sequentially connected, wherein the medicament box is filled with a foaming medicament, and the second fan can enable the foaming medicament in the medicament box to be sprayed onto polluted soil with peculiar smell volatilization through the air cylinder so as to separate peculiar smell diffusion; the first fan, the pump and the second fan are respectively in signal connection with the control module. The control system can move, and is efficient and low in cost to inhibit volatilization and dissipation of VOCs.

Description

Peculiar smell control system for digging operation in organic pollution site
Technical Field
The invention belongs to the technical field of organic pollution site remediation, and particularly relates to an odor control system for cleaning and digging operation of an organic pollution site.
Background
In recent years, the quantity of project for repairing polluted sites in China is rapidly increased, and the problem of secondary pollution in the process of repairing the organic polluted sites with peculiar smell is widely concerned. The peculiar smell is mainly from Volatile Organic Compounds (VOCs), and the compounds are dispersed in the air in the form of gas, enter the human body along with the breathing of people, cause great damage to the human body and affect the physiological functions of the human body. Aiming at the problem of VOCs dissipation pollution in the repair construction process of the organic pollution site, particularly the problem that the odor diffusion is difficult to prevent through large-scale measures in the deep foundation pit excavation operation process, the scientific and effective odor control system is provided as the best means for cutting off the pollutants from entering the air path.
At present, the prevention and control measures for VOCs in a plurality of polluted sites are to dig a closed negative-pressure greenhouse constructed above the ground in a range, pollutants volatilized in the construction process are collected in the greenhouse, and the gas in the greenhouse is discharged after reaching the standard after being treated by a tail gas treatment system through ventilation, so that the influence of the disturbance of the polluted soil excavation on the surrounding environment can be effectively prevented. However, in the construction of deep foundation pits (depth greater than 5m), there are many situations that the construction of greenhouses cannot be carried out or gas collection and gas guide measures cannot be taken on a large scale, so that another construction method for inhibiting the odor pollutants is needed.
Therefore, the development of an organic pollution site dredging operation odor control system is expected to overcome the difficulty of prevention and control of VOCs (volatile organic chemicals) caused by restrictive factors such as ground construction conditions, space mobility, span problems, construction cost and the like, save construction time, cost and manpower resources, and improve the overall engineering efficiency on the premise of ensuring the prevention and control of secondary pollution and the health of personnel.
Disclosure of Invention
The invention aims to provide a peculiar smell control system for dredging operation of an organic pollution site, which can quickly, effectively and low-cost inhibit volatilization and dissipation of VOCs under the condition that a closed workshop cannot be built and gas can not be collected in a large scale in the repair process of the pollution site with serious peculiar smell, thereby ensuring the health of operating personnel and the environmental safety.
In order to achieve the above object, the present invention provides an odor control system for an organic contaminated site excavation operation, comprising:
the adsorption module comprises an adsorption device and a first fan, wherein the first fan is connected to the adsorption device and used for sucking the odor gas into the adsorption device and discharging the odor gas after the odor gas is purified by the adsorption device;
the spraying module comprises a liquid medicine box, a pump and an atomizing nozzle which are sequentially connected, wherein the liquid medicine box is filled with an odor eliminating agent, and the pump can enable the odor eliminating agent in the liquid medicine box to be sprayed into the air through the atomizing nozzle so as to eliminate the odor in the air;
the separation module comprises a medicament box, a second fan and an air cylinder which are sequentially connected, wherein a foaming medicament is filled in the medicament box, and the second fan can enable the foaming medicament in the medicament box to be sprayed to the surface of the polluted soil with odor volatilization from the air cylinder to form a foam separation layer to separate odor from diffusing;
and the first fan, the pump and the second fan are respectively in signal connection with the control module.
Preferably, the adsorption device further comprises a gas collecting hood and an exhaust funnel, the gas collecting hood is connected to the inlet of the adsorption device through a corrugated pipe, a filter screen is arranged at the inlet of the adsorption device, the exhaust funnel is vertically arranged and communicated with the outlet of the adsorption device, a rain-proof hood is arranged at the top end of the exhaust funnel, and the first fan is communicated with the lower portion of the side wall of the exhaust funnel.
Preferably, the adsorption device is an activated carbon adsorber, and the first fan is a centrifugal fan.
Preferably, an overpressure return safety valve, a shock absorption damper and a filter are sequentially arranged between the pump and the atomizing nozzle.
Preferably, the pump is an electric diaphragm pump, and the odor eliminating agent is 3-5% hydrogen peroxide solution or 1-3% chlorine dioxide solution.
Preferably, the air duct comprises a barrel body, an ellipsoidal flow director, a spraying ring and a lifting support;
the spraying ring is arranged at one end of the cylinder body and is connected to a high-pressure medicine supply pipeline through a pipeline;
the second fan is arranged inside the cylinder, and the air outlet square opening faces the spray ring;
the ellipsoidal fluid director is arranged in the cylinder and is positioned between the spray ring and the second fan;
the outer wall of the barrel is hinged to the lifting support, so that the included angle between the axis of the barrel and the horizontal direction can be adjusted.
Preferably, a circular hole is formed in the spray ring, and a foam nozzle is mounted on the circular hole.
Preferably, the second fan is a jet fan, and the foaming agent comprises a foaming agent and foam powder.
Preferably, the control module is a PLC intelligent electric cabinet.
Preferably, the spraying device further comprises a supporting frame, and the adsorption module, the spraying module, the blocking module and the control module are all mounted on the supporting frame.
The invention has the beneficial effects that: the peculiar smell gas stored in the organic pollution site can be purified by the adsorption module and then discharged into the air; odor gas dissipated into the air can be removed through the spraying module; the polluted soil with odor volatilization can be isolated from the air through the blocking module, and the odor is prevented from being continuously diffused; a control module can be used for starting a proper peculiar smell treatment mode according to the site condition. The VOCs pollutants which are possibly diffused are subjected to on-site killing degradation, covering separation and collecting adsorption by means of following dredging, digestion separation control and on-site collection adsorption, the difficulty caused by limiting factors such as ground construction conditions, space mobility, greenhouse span problems and construction cost by structures such as a closed greenhouse is effectively overcome, the problem that the closed space for deep foundation pit construction is difficult to ventilate is solved, the construction time, the cost and manpower resources are saved, and the overall engineering efficiency is improved on the premise of ensuring secondary pollution prevention and personnel health.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals represent like parts throughout.
Fig. 1 shows a schematic diagram of an odor control system for an organic contaminated site excavation operation according to an embodiment of the present invention.
FIG. 2 shows a schematic diagram of a sorption module according to one embodiment of the invention.
Fig. 3 shows a schematic view of an air duct according to an embodiment of the present invention.
Figure 4 shows a schematic view of a medicament cartridge according to an embodiment of the invention.
Fig. 5 shows a schematic view of a spray module according to an embodiment of the invention.
Description of the reference numerals
1. A gas-collecting hood; 2. a bellows; 3. an activated carbon adsorber; 4. a centrifugal fan; 5. an exhaust funnel; 6. an air duct; 7. a jet fan; 8. a kit; 9. an outlet valve; 10. a feed inlet; 11. a shock absorbing damper; 12. an overpressure reflux safety valve; 13. an electric diaphragm pump; 14. an atomizing nozzle; 15. a liquid medicine box; 16. a lifting support; 17. a filter; 18. a support frame; 19. a PLC intelligent electric control cabinet; 20. an adsorption module; 21. a spray module; 22. a barrier module;
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
The peculiar smell control system for the dredging operation of the organic pollution site comprises:
the adsorption module comprises an adsorption device and a first fan, and the first fan is connected to the adsorption device and used for sucking the peculiar smell gas into the adsorption device and discharging the peculiar smell gas after being filtered by the adsorption device;
the spraying module comprises a liquid medicine box, a pump and an atomizing nozzle which are sequentially connected, wherein the liquid medicine box is filled with the peculiar smell eliminating agent, and the pump can spray the peculiar smell eliminating agent in the liquid medicine box into the air through the atomizing nozzle so as to eliminate the peculiar smell in the air;
the separation module comprises a medicament box, a second fan and an air cylinder which are sequentially connected, wherein the medicament box is filled with a foaming medicament, and the second fan can enable the foaming medicament in the medicament box to be sprayed onto polluted soil with peculiar smell volatilization through the air cylinder so as to separate peculiar smell diffusion;
and the control module, the first fan, the pump and the second fan are respectively in signal connection with the control module.
Specifically, odor gas stored in the organic pollution site can be purified by the adsorption module and then discharged into the air; odor gas dissipated into the air can be removed through the spraying module; the polluted soil with odor volatilization can be isolated from the air through the blocking module, and the odor is prevented from being continuously diffused; a control module can be used for starting a proper peculiar smell treatment mode according to the site condition. The VOCs pollutants which are possibly diffused are subjected to on-site killing degradation, covering separation and collecting adsorption by means of following dredging, digestion separation control and on-site collection adsorption, the difficulty caused by limiting factors such as ground construction conditions, space mobility, greenhouse span problems and construction cost by structures such as a closed greenhouse is effectively overcome, the problem that the closed space for deep foundation pit construction is difficult to ventilate is solved, the construction time, the cost and manpower resources are saved, and the overall engineering efficiency is improved on the premise of ensuring secondary pollution prevention and personnel health.
As preferred scheme, adsorption equipment still includes gas collecting channel and aiutage, and the gas collecting channel passes through the bellows to be connected in adsorption equipment's entrance, and is equipped with the filter screen in adsorption equipment's entrance, and the aiutage is vertical to be set up, and with adsorption equipment's export intercommunication, the top of aiutage is equipped with rain-proof cover, the lower part intercommunication of the lateral wall of first fan and aiutage.
Particularly, the gas collecting channel and the corrugated pipe are connected quickly in a buckling mode, the gas collecting channel is provided with a handle, the gas collecting channel can be manually held according to the digging progress to actively and directionally collect the position possibly generating peculiar smell, and a tripod can also be used for supporting and placing a fixed point for automatic collection.
Preferably, the adsorption device is an activated carbon adsorber, and the first fan is a centrifugal fan.
In particular, activated carbonThe adsorber is internally provided with a container of 0.8m 3-1m 3The active carbon block and a centrifugal fan at the rear end of the active carbon absorber provide wind pressure power for gas collection, and VOCs odor gas reaches the standard after being filtered by the gas collecting hood and the active carbon and is discharged into the atmospheric environment through the exhaust funnel.
Preferably, an overpressure return safety valve, a damping damper and a filter are sequentially arranged between the pump and the atomizing nozzle.
Specifically, in order to ensure safe use, a damping damper, an overpressure backflow safety valve and a filter are arranged on a pipeline between the pump and the atomizing nozzle, on one hand, the flow of the liquid medicine is controlled to be uniform, the liquid medicine is filtered, on the other hand, once the delivery pressure exceeds the pressure limit of the nozzle of the atomizer, the liquid medicine flows back to the liquid medicine box through the overpressure backflow safety valve, and the liquid medicine pipeline is prevented from splashing to hurt people.
Preferably, the pump is an electric diaphragm pump, and the odor eliminating agent is 3-5% hydrogen peroxide solution or 1-3 ‰ chlorine dioxide solution.
Specifically, the odor eliminating agent may be other green, safe, easily available oxidation type medicinal agent or odor suppressing medicinal liquid.
As the preferred scheme, the air duct comprises a barrel body, an ellipsoidal flow director, a spraying ring and a lifting support;
the spraying ring is arranged at one end of the cylinder body, the end is a foam spraying end and is connected to the chemical box through a high-pressure pipeline;
the second fan is arranged in the cylinder, and the air outlet square opening faces the spraying ring;
the ellipsoidal fluid director is arranged in the cylinder and is positioned between the spray ring and the jet fan;
the outer wall of the barrel is hinged to the lifting support, so that the included angle between the axis of the barrel and the horizontal direction can be adjusted.
Specifically, the air duct is hinged to the lifting support, so that the height of the air duct can be lifted, the elevation angle of the air duct can be adjusted, and the operation radius of the air duct can be increased to meet the requirement of remote operation.
As the preferred scheme, be equipped with the round hole on the spraying ring, install the foam nozzle on the round hole.
Preferably, the second fan is a jet fan, and the foaming agent comprises a foaming agent and foam powder.
As the preferred scheme, the control module is a PLC intelligent electric cabinet.
Particularly, the PLC comprehensive intelligent control cabinet can be used for controlling to carry out corresponding program design according to project implementation requirements, and the PLC comprehensive intelligent control cabinet is more intelligent and convenient to use.
Preferably, the device further comprises a support frame, and the adsorption module, the spraying module, the blocking module and the control module are all mounted on the support frame.
Specifically, for a deep foundation pit excavation site constructed in a large area for a long time, due to uncertainty of a construction area, all modules are integrated on a movable support frame and flexibly move along with excavation progress or construction machinery and the like;
but for the excavation operation of a small-area deep foundation pit, all the modules can be directly fixed at the position close to the edge of the top of the foundation pit, and the odor of VOCs on the site is controlled by using the operation angle of the equipment.
Examples
Fig. 1 is a schematic diagram showing an odor control system for an organic contaminated site excavation operation according to the present embodiment; FIG. 2 shows a schematic diagram of an adsorption module according to the present embodiment; fig. 3 shows a schematic view of an air duct according to the present embodiment; FIG. 4 shows a schematic view of a medicament cartridge according to the present embodiment; fig. 5 shows a schematic view of a spray module according to the present embodiment.
As shown in fig. 1 to 5, the odor control system for dredging operation of organic contaminated site comprises: an adsorption module 20, a spraying module 21, a blocking module 22 and a control module which are arranged on the supporting frame 18;
the adsorption module 20 comprises an activated carbon adsorber 3 and a centrifugal fan 4, the gas collecting hood 1 is connected to the inlet of the activated carbon adsorber 3 through a corrugated pipe 2, a filter screen is arranged at the inlet of the activated carbon adsorber 3, an exhaust funnel 5 is vertically arranged and communicated with the outlet of the activated carbon adsorber 3, a rain-proof hood is arranged at the top end of the exhaust funnel 5, the centrifugal fan 4 is communicated with the lower part of the side wall of the exhaust funnel 5, the centrifugal fan 4 sucks odor gas into the activated carbon adsorber 3 through the gas collecting hood 1 and the corrugated pipe 2, and the odor gas is filtered by the activated carbon adsorber 3 and then is exhausted through the exhaust funnel 5;
the spraying module 21 comprises a liquid medicine box 15, an electric diaphragm pump 13 and an atomizing nozzle 14 which are connected in sequence, an overpressure reflux safety valve 12, a damping damper 11 and a filter 17 are sequentially arranged between the electric diaphragm pump 13 and the atomizing nozzle 14, a peculiar smell eliminating agent is filled in the liquid medicine box 15 and is 3-5% of hydrogen peroxide solution or 1-3% of chlorine dioxide solution, and the electric diaphragm pump 13 can spray the peculiar smell eliminating agent in the liquid medicine box 15 into the air through the atomizing nozzle 14 so as to eliminate peculiar smell in the air;
the blocking module 22 comprises a chemical box 8, a jet fan 7 and an air cylinder 6 which are sequentially connected, a feed inlet 10 and an outlet valve 9 are arranged on the chemical box 8, foaming chemicals are filled in the chemical box 8, the foaming chemicals comprise foaming agents and foam powder, and the jet fan 7 can enable the foaming chemicals in the chemical box 8 to be sprayed onto polluted soil with peculiar smell volatilization through the outlet valve 9 and the air cylinder 6 so as to block the peculiar smell from diffusing;
wherein, the air duct comprises a barrel body, an ellipsoidal flow director and a spraying ring; the spraying ring is arranged at one end of the cylinder body and is connected with the chemical box 8 through a pipeline; the jet flow fan is arranged in the cylinder, and the air outlet square opening faces the spraying ring; the ellipsoidal fluid director is arranged in the cylinder and is positioned between the spray ring and the jet fan; the outer wall of the cylinder is hinged with the lifting support 16, so that the included angle between the axis of the cylinder and the horizontal direction can be adjusted; a circular hole is arranged on the spray ring, and a foam nozzle is arranged on the circular hole;
the control module is a PLC intelligent electric cabinet 19, and the centrifugal fan 4, the electric diaphragm pump 13 and the jet fan 7 are respectively in signal connection with the PLC intelligent electric cabinet 19.
According to the practical situations of loss of volatile organic pollutants (VOCs) and secondary pollution hidden dangers in the field excavation construction process of the deep foundation pit in the organic pollution site, the system for inhibiting the odor in the deep foundation pit excavation process is provided, an environment-friendly, safe and green odor inhibition mode is provided for the field excavation process of pollution such as pesticides, benzene series, halogenated aliphatic hydrocarbon, halogenated aromatic hydrocarbon, odorous substances and the like, the field construction operators and surrounding sensitive targets are protected, and the secondary pollution to the environment caused by pollutant diffusion is prevented.
In the construction process, the foaming agent can be remotely sprayed, the spraying is carried out at a short distance, the adsorption treatment is collected, and the using scale and the using quantity are determined according to the actual construction requirements. The peculiar smell remover is an oxidation type medicament which is green, safe and easy to obtain, VOCs gas is degraded in the using process, and health hazards to field operators are avoided; during construction, the operation can be performed at fixed points or according to a route, and the site construction is convenient. The method has the advantages that in the process of repairing the pesticide polluted site with serious peculiar smell, the volatile dissipation of the VOCs can be rapidly, effectively and low-cost inhibited under the condition that a deep foundation pit cannot be built in a closed workshop and gas is collected on a large scale, the health of operating personnel is ensured, and the environmental safety is ensured.
The control method of the scheme comprises the following steps:
1) the odor collecting and adsorbing method for realizing the deep foundation pit dredging operation is mainly realized through an adsorption module, and the module comprises a rectangular gas collecting hood, a corrugated pipe (a hose) with a steel wire lining, a high-efficiency filter screen, an active carbon adsorber, a centrifugal fan, an exhaust funnel and a PLC comprehensive intelligent control cabinet.
2) The method is mainly realized through a spraying module, and the module comprises an atomizing nozzle, a medicine delivery hose, a damping damper, an overpressure backflow safety valve, an electric diaphragm pump, a liquid medicine box and a PLC comprehensive intelligent control cabinet.
3) The blocking method is mainly realized through a blocking module, the module comprises an energy-saving air duct, a jet fan, a liquid medicine box and a PLC comprehensive intelligent control cabinet, in order to guarantee remote injection in the process of clearing and digging a deeper foundation pit, the air duct is installed by a liftable lifting support, the maximum lifting height can reach 1m according to working condition requirements, the maximum elevation angle of the energy-saving air duct can reach 65 degrees, and the injection operation range of the system is improved.
The cooperation of each subassembly can be carried out according to actual clear foundation ditch degree of depth and the area demand of digging, the sense organ of VOCs peculiar smell gas diffusion concentration and feels and use. All components can be integrated on a supporting frame structure, and combined odor control operation can be realized according to requirements in construction.
The adsorption module is in a movable and active VOCs absorption and purification mode, the length of a corrugated pipe with a steel wire lining matched with a monomer is 10-15m, the diameter of the corrugated pipe is 300mm, the wind collection cover is a rectangular PVC collection cover with the size of 200mm multiplied by 300mm, the joint of the wind collection cover and the corrugated pipe is a section of cylinder, the length of the cylinder section is 500mm, the adsorption module and the corrugated pipe are in snap-in quick connection, and a handle is arranged. The other end of the corrugated pipe is connected with a joint of an activated carbon adsorber, and the inside of the corrugated pipe is provided with a pipe with the diameter of 0.8-1m 3The rear end of the activated carbon absorber is provided with a centrifugal fan which provides wind pressure power for gas collection, the wind volume is 3000m3/h, and VOCs odor gas is filtered by a gas collection port, a corrugated pipe and activated carbon and then is discharged into the atmosphere after reaching the standard through an exhaust funnel. The aiutage adopts a thick PVC section of thick bamboo of 5mm, diameter 200mm, high 1.5m, rain-proof cover of top welding, can adopt artifical handheld gas collection mouth to initiatively directional collection to the position that probably produces the peculiar smell according to the clear progress of digging, also can adopt the tripod to support and place fixed point automatic collection.
The blocking module is a movable and active VOCs foam blocking operation mode, the sprayed foam is fine, compact and creamy and has certain persistence, and the liquid medicine added with the foaming agent and the special foam powder is sprayed at high speed to the polluted soil with peculiar smell volatilization to cover through the cooperation of the air cylinder and the jet fan, so that the path of smell diffusion is blocked. In order to increase the radius of the single air duct injection operation, the air duct is designed to be capable of lifting 1m in height and having a maximum elevation angle of 65 degrees, and long-distance operation can be met.
The spraying module is portable, active VOCs spraying elimination operation mode, the supporting 1m hand-held type atomizing nozzle of monomer, peculiar smell eliminating agent can select the liquid medicine that has the oxidability or other smell suppression liquid medicines, it is 3-5% hydrogen peroxide or 1-3 thousandth chlorine dioxide solution to recommend the liquid medicine to select, the liquid medicine is through rear end electric diaphragm pump from liquid medicine case pump sending to atomizing nozzle, because electric diaphragm pump equipment attribute, for guaranteeing safe in utilization, dispose damping damper and superpressure backward flow relief valve in the liquid medicine pipeline, on the one hand, control liquid medicine flow uniformity and filter the liquid medicine, on the other hand in case delivery pressure exceeds atomizer spraying pressure restriction, the liquid medicine can flow back to the liquid medicine case through the superpressure, prevent that liquid medicine pipeline spatters and squirts the people.
The pipeline and valve in the system are selected as follows:
(1) since the chemical used is an oxidizing chemical, materials for equipment, pipes, and valves should be selected to prevent corrosion.
(2) The valve is recommended to be made of 304 stainless steel or engineering plastics to prevent the occurrence of leakage in running process of the system.
(3) The type selection of the electric diaphragm pump can be selected according to the site pollution degree, the diaphragm pump with larger flow can be selected in a place with serious pollution, and a safety valve and overpressure backflow are suggested to be installed on an outlet pipeline at the rear end of the diaphragm pump for ensuring the use safety.
Due to the uncertainty of the construction area, the equipment system can be integrated on the movable support frame for the deep foundation pit excavation site with large-area long-term construction and can flexibly move along with the excavation progress or construction machinery, the equipment can be fixed at the position close to the top of the foundation pit and the edge of the foundation pit for the small-area deep foundation pit excavation operation, and the operation angle of the equipment is utilized to control the odor of VOCs on the site. The three modules are all controlled by a PLC comprehensive intelligent control cabinet, and can be subjected to corresponding programming according to project implementation requirements. The construction method needs one construction operator on site to operate, mainly works in determining the position of the equipment system, selecting an operation mode and monitoring the operation condition of the equipment system, and the operator moves along with the construction of the equipment system.
As shown in figure 1, all the components are integrated on an 18-plate frame structure, can be freely disassembled and assembled, and can be used independently or jointly. 20 is peculiar smell collection and adsorption component, 21 is spraying peculiar smell elimination component, and 22 is spraying foam blocking component. Wherein the 18 flat plate frame structure can be borne on the four-wheel trolley and also on the track, thereby being convenient for on-site movement and use. 19 is PLC intelligent electric cabinet, and the subassembly work that provides for whole system stops the setting with the action start and stop, also can reset according to the project each subassembly frequency of use and medicament quantity, duration distribution etc. difference.
As shown in figure 2, the adsorption module 20 is powered by the centrifugal fan 4, and the constructor pumps the peculiar smell gas to the corrugated pipe through the gas collecting hood 12, adsorbing pollutants through an activated carbon adsorber 3, and then discharging the pollutants which reach the standard through an exhaust funnel 5 into the atmosphere. Wherein the air volume of the centrifugal fan 4 is 3000m3/h, and the filling amount of the active carbon in the active carbon adsorber 3 is 0.8-1m 3And the configuration can be carried out according to the actual requirement of the project. The gas collecting hood 1 can be manually held, and the gas collecting port can be fixed at a proper position and automatically collected at a proper height by using a tripod under the working condition that manual movement operation is not needed.
As shown in fig. 3-4, the main operation devices of the blocking module 22 are an energy-saving air duct 6 and a jet fan 7, wherein the chemical tank 8 is a storage tank for spraying liquid chemicals, and is filled with a solution prepared in advance through a feed inlet 10, the outlet valve 9 is connected to the air duct 6 through a pipeline, and the feed inlet 10 is a mouth of a liquid chemical adding bin. Wherein, the barrel of dryer 6 articulates on U type or triangle-shaped rotatable lift support 16 through the rolling bearing, and jet fan 7 installs inside the barrel. The inner part of the air duct is provided with an ellipsoidal fluid director, the outlet of the barrel body is provided with an anti-freezing and anti-blocking double-layer annular pipeline which is connected with a high-pressure medicine supply pipeline and mainly comprises a large spraying ring and a small spraying ring, all the annular pipelines are made of stainless steel materials, a plurality of round holes are arranged on the annular pipelines, and the foam nozzle and the round holes are concentrically welded. The included angle between the foam nozzle and the axis of the cylinder body is 0-90 degrees, and the threaded ball valve is installed at the tail end of the annular pipeline in a tapping mode, so that the effect of controlling the spraying amount is achieved. The liquid medicine mixed with the foaming agent forms a fine and compact foam layer after being sprayed out through the air duct, so that the diffusion of peculiar smell gas is isolated.
As shown in fig. 5, the main operation equipment of the spraying module is provided with spraying power by an electric diaphragm pump 13, the odor eliminating agent prepared in a liquid medicine tank 15 enters the electric diaphragm pump 13 through a liquid inlet, passes through a damping damper 11 and an overpressure reflux safety valve 12 and then is sprayed out from an atomizing nozzle 14 through a filtering device 17 to form uniformly dispersed small liquid drops for eliminating odor; once the delivery pressure exceeds the pressure limit of the atomizing nozzle 14, the liquid medicine passes through the overpressure return safety valve 12 to the liquid medicine tank 15, and the liquid medicine pipeline is prevented from splashing to hurt people.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. The utility model provides an organic contaminated site digs operation peculiar smell control system which characterized in that includes:
the adsorption module comprises an adsorption device and a first fan, wherein the first fan is connected to the adsorption device and used for sucking the odor gas into the adsorption device and discharging the odor gas after the odor gas is purified by the adsorption device;
the spraying module comprises a liquid medicine box, a pump and an atomizing nozzle which are sequentially connected, wherein the liquid medicine box is filled with an odor eliminating agent, and the pump can enable the odor eliminating agent in the liquid medicine box to be sprayed into the air through the atomizing nozzle so as to eliminate the odor in the air;
the separation module comprises a medicament box, a second fan and an air cylinder which are sequentially connected, wherein a foaming medicament is filled in the medicament box, and the second fan can enable the foaming medicament in the medicament box to be sprayed to the surface of the polluted soil with odor volatilization from the air cylinder to form a foam separation layer to separate odor from diffusing;
and the first fan, the pump and the second fan are respectively in signal connection with the control module.
2. The odor control system for dredging operation of organic contaminated site as claimed in claim 1, wherein the adsorption apparatus further comprises a gas collecting hood and an exhaust funnel, the gas collecting hood is connected to the inlet of the adsorption apparatus through a corrugated pipe, a filter screen is arranged at the inlet of the adsorption apparatus, the exhaust funnel is vertically arranged and communicated with the outlet of the adsorption apparatus, a rain-proof hood is arranged at the top end of the exhaust funnel, and the first fan is communicated with the lower portion of the side wall of the exhaust funnel.
3. The odor control system of claim 1 wherein the absorber is an activated carbon adsorber and the first fan is a centrifugal fan.
4. The odor control system of claim 1, wherein an overpressure return relief valve, a shock absorbing damper and a filter are sequentially disposed between the pump and the atomizing nozzle.
5. The odor control system for dredging operation in organic contaminated site as claimed in claim 1, wherein the pump is an electric diaphragm pump, and the odor eliminating agent is 3-5% hydrogen peroxide solution or 1-3% chlorine dioxide solution.
6. The odor control system for the dredging operation of the organic pollution site as claimed in claim 1, wherein the air duct comprises a barrel body, an ellipsoidal flow deflector, a spray ring and a lifting support;
the spraying ring is arranged at one end of the cylinder body and is connected with a high-pressure medicine supply pipeline through a pipeline;
the second fan is arranged inside the cylinder, and the air outlet square opening faces the spray ring;
the ellipsoidal fluid director is arranged in the cylinder and is positioned between the spray ring and the second fan;
the outer wall of the barrel is hinged to the lifting support, so that the included angle between the axis of the barrel and the horizontal direction can be adjusted.
7. The odor control system for dredging operation of organic pollution field according to claim 6, wherein the spraying ring is provided with a round hole, and the round hole is provided with a foam nozzle.
8. The odor control system of claim 1 wherein the second fan is a jet fan and the foaming agent comprises a foaming agent and a foam powder.
9. The odor control system for the dredging operation of the organic pollution site as claimed in claim 1, wherein the control module is a PLC intelligent electric cabinet.
10. The odor control system for dredging operation of organic contaminated site according to claim 1, further comprising a support frame, wherein the adsorption module, the spraying module, the blocking module and the control module are all mounted on the support frame.
CN201911166110.4A 2019-11-25 2019-11-25 Peculiar smell control system for digging operation in organic pollution site Pending CN110772953A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111407905A (en) * 2020-04-29 2020-07-14 辽宁三医科技有限公司 A regularly disinfection machine people for severe infection area of hospital
CN112090953A (en) * 2020-09-08 2020-12-18 生态环境部南京环境科学研究所 Treatment device and method for removing peculiar smell of peculiar smell soil
CN113406916A (en) * 2020-11-27 2021-09-17 苏州精英环保有限公司 Method for removing pungent smell in organic contaminated soil excavation construction process
CN113477688A (en) * 2021-06-25 2021-10-08 岩土科技股份有限公司 Spraying device and use method and application thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111407905A (en) * 2020-04-29 2020-07-14 辽宁三医科技有限公司 A regularly disinfection machine people for severe infection area of hospital
CN112090953A (en) * 2020-09-08 2020-12-18 生态环境部南京环境科学研究所 Treatment device and method for removing peculiar smell of peculiar smell soil
CN112090953B (en) * 2020-09-08 2021-11-16 生态环境部南京环境科学研究所 Treatment device and method for removing peculiar smell of peculiar smell soil
CN113406916A (en) * 2020-11-27 2021-09-17 苏州精英环保有限公司 Method for removing pungent smell in organic contaminated soil excavation construction process
CN113477688A (en) * 2021-06-25 2021-10-08 岩土科技股份有限公司 Spraying device and use method and application thereof

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