CN110614029A - Asphalt flue gas purification system and purification method thereof - Google Patents
Asphalt flue gas purification system and purification method thereof Download PDFInfo
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- CN110614029A CN110614029A CN201910902541.6A CN201910902541A CN110614029A CN 110614029 A CN110614029 A CN 110614029A CN 201910902541 A CN201910902541 A CN 201910902541A CN 110614029 A CN110614029 A CN 110614029A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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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
- B01D53/007—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 irradiation
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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
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
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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
- B01D53/76—Gas phase processes, e.g. by using 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
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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
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The invention discloses an asphalt flue gas purification system and a purification method thereof, wherein the asphalt flue gas purification system comprises a tank area flue gas collection unit, a main building flue gas collection unit, a pretreatment unit, a purification unit and an induced draft fan, wherein asphalt flue gas collected by the tank area flue gas collection unit and/or the main building flue gas collection unit is guided by the induced draft fan to the pretreatment unit for pretreatment and is discharged after being purified by the purification unit; the pretreatment unit comprises a washing device, a demisting device and an electrostatic field generating device which are connected in sequence; the purification unit comprises a UV photo-oxidation catalytic device, a plasma discharge device and a UV photo-catalytic device which are sequentially connected; the invention is based on the purification strategy of 'decentralized collection and centralized treatment' and utilizes the purification process of 'multi-stage pretreatment and multi-stage combined purification technology', thereby realizing the high-efficiency purification of the asphalt smoke and the high-economical operation of the purification equipment.
Description
Technical Field
The invention relates to the technical field of asphalt flue gas purification systems, in particular to an asphalt flue gas purification system and a purification method thereof.
Background
The asphalt mixture stirring equipment is complete equipment for stirring a mixture of coarse aggregates, fine aggregates, fillers, asphalt and the like which are heated and dried at a certain temperature into a uniform mixture according to a designed mixing ratio, and is widely applied to infrastructure construction of expressways, urban roads, docks, airports and the like. Along with the continuous development of society, environmental problems are increasingly highlighted, the country pays more and more attention to environmental protection, environmental protection policy strength is unprecedented, stricter requirements are put forward on the emission of asphalt mixing equipment, the problems of dust and asphalt smoke emission in the production process flow of asphalt mixtures are paid more and more attention, main components comprise asphalt smoke oil drops, gaseous carcinogenic malodorous VOC (volatile organic Compounds), dust, smoke particulate matters and the like, and in order to prevent the asphalt smoke from harming the health of people and polluting the surrounding environment, the asphalt smoke must be effectively restrained, and the air quality of the surrounding environment is improved.
At present, some measures have been taken for purifying asphalt smoke of asphalt mixture stirring equipment, particularly, a purifier is taken as a main choice, for example, a Chinese patent with application number of 201710550928.0 discloses a VOCs waste gas treatment device, and a primary filter screen, a UV photocatalytic processor, a plasma generator and an activated carbon filter layer are sequentially arranged between an air inlet and an air outlet; the VOCs waste gas treatment device provided by the invention is used for treating VOCs waste gas with different components by mutually matching the UV photocatalysis processor and the plasma generator, and treating volatile organic compound gas by cooperation of UV light and plasma. However, the pretreatment only adopts a simple filter screen, a large amount of water vapor, oil mist and even dust directly enter the UV photocatalytic processor and the plasma generator, and the purification effect is seriously influenced due to insufficient pretreatment; when the temperature of the flue gas is too high, no cooling measures are taken, and the purification efficiency is influenced; the shortage of pretreatment can also shorten the maintenance period, shorten the service life of the purification equipment, increase the operation cost, and a large amount of oil mist and water vapor enter a plasma generator and the like to easily cause ignition, short circuit and the like; the adsorption effect of the activated carbon to the gaseous VOC is better, but the desorption difficulty to the asphalt smoke oil drops is large, incomplete and difficult to highly-efficiently recycle, and the domestic environmental protection service at the present stage is not sound, the activated carbon replacement cost is high, the user replacement frequency is low, and the use effect is reduced.
For example, the chinese patent with application number 201710814943.1 discloses a low-temperature plasma photolysis all-in-one machine, which comprises a spray tower, a plasma UV purifier and a chimney, wherein an air outlet of the spray tower is communicated with the plasma UV purifier, and the plasma UV purifier is communicated with the chimney through a fan; not only have high efficiency air-purifying's ability, simultaneously one also can carry out drying process to waste gas, avoid waste gas to cause the damage to electronic components in the equipment. Compared with the Chinese patent with the application number of 201710550928.0, the spray tower is additionally arranged to carry out preliminary cooling and washing on the flue gas, but the moisture content of the waste gas from the spray tower is high, and the waste gas still contains tar particles, and the waste gas directly enters the low-temperature plasma photolysis all-in-one machine to influence the purification efficiency, so that the plasma module is easy to ignite, short circuit and the like, and the UV photolysis technology has no obvious flue gas purification effect without the auxiliary action of a catalyst.
Before and after the production operation of the asphalt mixture stirring equipment, the asphalt storage tank has preheating and cooling processes, different from the operation process, no asphalt smoke escapes from the main building, the emission amount of the smoke of the storage tank is small, but the existing asphalt smoke purification equipment is fixedly configured and cannot be adjusted according to special working conditions, and the original purification equipment is still adopted to normally operate, so that energy waste is caused; in order to solve the problem, some manufacturers adopt a scheme of configuring two sets of purifiers, one set of purifiers is used for treating the flue gas recovered by the main building, and the other set of purifiers is used for treating the flue gas recovered by the asphalt storage tank, but the scheme of respectively treating the flue gas recovered by the main building and the flue gas recovered by the storage tank by adopting two sets of equipment increases the purchase cost, and meanwhile, the operation cost is increased by operating the two sets of equipment, so that the environmental protection investment of users is further increased.
Disclosure of Invention
The invention aims to provide an asphalt flue gas purification system and an asphalt flue gas purification method, which aim to solve the problems of poor asphalt flue gas purification effect and high operation cost of asphalt flue gas purification equipment in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
on one hand, the invention provides an asphalt flue gas purification system which comprises a tank area flue gas collection unit, a main building flue gas collection unit, a pretreatment unit, a purification unit and an induced draft fan, wherein the induced draft fan is connected with a flue gas output end of the purification unit; the asphalt flue gas collected by the tank area flue gas collecting unit and/or the main building flue gas collecting unit is guided to a pretreatment unit by a draught fan for pretreatment, and is purified by a purification unit and then discharged;
the pretreatment unit comprises a washing device, a demisting device and an electrostatic field generating device which are connected in sequence;
the purification unit comprises a UV light oxygen photocatalysis device, a plasma discharge device and a UV light photocatalysis device which are connected in sequence.
As optimization, an air-equalizing filtering unit is further connected between the pretreatment unit and the purification unit, and comprises an air-equalizing plate, a stainless steel wire filtering net and a polyester fiber filtering net which are sequentially connected.
Preferably, the tank field flue gas collecting unit comprises an asphalt heavy oil storage tank, a tank field flue gas collecting branch pipeline and a tank field flue gas collecting main pipeline which are sequentially connected.
And as optimization, the main building smoke collection unit comprises a stirring smoke collection device, a finished product bin smoke collection device and a loading area smoke collection device, and the stirring smoke collection device, the finished product bin smoke collection device and the loading area smoke collection device are respectively connected to a production smoke collection main pipeline through respective production smoke conveying pipelines.
As optimization, this pitch gas cleaning system still includes the on-line monitoring unit, and the on-line monitoring unit is including the temperature sensor who is arranged in monitoring pitch heating real-time temperature, the first VOC concentration monitoring unit that is arranged in monitoring jar district gas collection unit output VOC concentration in the pitch flue gas, the third VOC concentration monitoring unit that is arranged in monitoring the second VOC concentration monitoring unit that is arranged in monitoring main building gas collection unit output VOC concentration in the pitch flue gas and is arranged in monitoring purification unit output VOC concentration in the pitch flue gas.
As optimization, the asphalt flue gas purification system further comprises a control system, a first control valve system connected to the flue gas output end of the tank area flue gas collection unit and a second control valve system connected to the flue gas output end of the main building flue gas collection unit, wherein the control system can configure the pretreatment unit and the purification unit, and can control the opening of the valves in the first control valve system and the second control valve system and the start and stop of the pretreatment unit and the purification unit according to the monitoring result of the online monitoring unit.
In another aspect, the present invention provides an asphalt flue gas purification method of the asphalt flue gas purification system, including the following steps:
judging the selected operation mode, wherein the operation mode comprises the following steps: an asphalt preheating operation mode, a production operation mode, an asphalt heat-preservation operation mode and an asphalt cooling operation mode;
switching an induced draft fan, a demisting device, a washing device, an electrostatic field generating device, a UV photo-oxygen photocatalysis device, a plasma discharging device and the UV photo-catalysis device to a selected operation mode and sequentially starting the devices;
carrying out pretreatment and purification treatment on the collected asphalt smoke in sequence, wherein the pretreatment comprises the following steps: washing, demisting and electrostatic field treatment are carried out on the collected asphalt flue gas; the purification treatment comprises the following steps: and carrying out UV photo-oxygen photocatalytic treatment, plasma discharge treatment and UV photocatalytic treatment on the pretreated asphalt smoke.
As optimization, the purification method also comprises the steps of carrying out air equalization and filtration treatment on the asphalt smoke after pretreatment and before purification treatment.
As optimization, when the real-time temperature of asphalt heating is greater than or equal to a preset target temperature, automatically switching to a production operation running mode; when the VOC concentration in the asphalt flue gas output by the tank field flue gas collection unit is lower than the preset target concentration, the asphalt flue gas purification system is closed;
the method for closing the asphalt flue gas purification system comprises the following steps:
closing a UV photocatalysis device, a plasma discharge device and a UV photooxidation photocatalysis device in the purification unit in sequence;
closing the electrostatic field generating device 20 seconds after closing the purification unit;
closing the electrostatic field generating device for 20 seconds, and then closing the washing device;
closing the washing device for 1 minute, and then closing the demisting device;
and closing the induced draft fan after the demisting device is closed for 3 minutes.
As an optimization, the purification method further comprises: and detecting manual switching information, and determining an operation mode according to the manual switching information.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an asphalt flue gas purification system and a purification method thereof, wherein the asphalt flue gas purification system comprises a tank area flue gas collection unit, a main building flue gas collection unit, a pretreatment unit, a purification unit and an induced draft fan; the asphalt flue gas collected by the tank area flue gas collecting unit and/or the main building flue gas collecting unit is guided to a pretreatment unit by a draught fan for pretreatment, and is purified by a purification unit and then discharged; based on a purification strategy of 'dispersive collection and centralized treatment', a flue gas trapping device and a collection pipeline are arranged at a main dissipation point of the asphalt flue gas, so that the unorganized emission of the asphalt flue gas is effectively controlled;
the invention provides a pitch flue gas purification system and a purification method thereof.A pretreatment unit comprises a washing device, a demisting device and an electrostatic field generating device which are connected in sequence; the purification unit comprises a UV photo-oxidation catalytic device, a plasma discharge device and a UV photo-catalytic device which are sequentially connected; the purification process of 'multi-stage pretreatment + multi-stage combined purification technology' is adopted, so that the pretreatment is sufficient, the equipment is safe to operate, the purification efficiency is high, the organized emission of asphalt smoke is effectively controlled, the environmental protection is ensured to reach the standard, and the guarantee is provided for the green production of users;
the invention provides a pitch gas cleaning system and its purification method, judge the selected operation mode; switching an induced draft fan, a demisting device, a washing device, an electrostatic field generating device, a UV photo-oxygen photocatalysis device, a plasma discharging device and the UV photo-catalysis device to a selected operation mode and sequentially starting the devices; sequentially carrying out pretreatment and purification treatment on the collected asphalt smoke; aiming at the difference of the asphalt flue gas emission concentration and the asphalt flue gas emission amount under various working conditions of an asphalt mixing station, the system is matched with different draught fan air volume and air pressure, asphalt flue gas purification equipment opening configuration and the like, so that the high-efficiency purification of the asphalt flue gas is realized, the high-economical operation of the purification equipment is realized, the energy is saved, the environment is protected, the operation cost is saved, and the economic benefit of a production enterprise is improved;
the invention provides an asphalt flue gas purification system and a purification method thereof, and the method for closing the asphalt flue gas purification system comprises the following steps: closing a UV photocatalysis device, a plasma discharge device and a UV photooxidation photocatalysis device in the purification unit in sequence; closing the electrostatic field generating device 20 seconds after closing the purification unit; closing the electrostatic field generating device for 20 seconds, and then closing the washing device; closing the washing device for 1 minute, and then closing the demisting device; closing the demisting device for 3 minutes, and then closing the induced draft fan; after the asphalt mixture stirring equipment stops working, the cooling of the asphalt storage tank needs a period of time, the intelligent shutdown method can realize delayed shutdown, the waiting of personnel after the working is finished is avoided, and the asphalt storage tank can automatically shut down and power off after the cooling of the asphalt storage tank is finished.
Drawings
FIG. 1 is a flow chart of a cleaning mode selection of a cleaning system and a cleaning method for asphalt flue gas according to an embodiment of the present invention;
FIG. 2 is a control flow chart of an asphalt preheating operation mode of an asphalt flue gas purification system and a purification method thereof according to an embodiment of the present invention;
FIG. 3 is a control flow chart of operation mode of production operation of a system and a method for purifying asphalt flue gas according to an embodiment of the present invention;
FIG. 4 is a control flow chart of an asphalt heat-preservation operation mode of an asphalt flue gas purification system and a purification method thereof according to an embodiment of the present invention;
FIG. 5 is a control flow chart of an asphalt cooling operation mode of an asphalt flue gas purification system and a purification method thereof according to an embodiment of the present invention;
FIG. 6 is a control flow chart of an open cleaning mode of a system and a method for cleaning asphalt smoke according to an embodiment of the present invention;
FIG. 7 is a flow chart of the control of the automatic matching configuration of the asphalt flue gas purification system and the purification method thereof according to the embodiment of the present invention;
FIG. 8 is a flow chart of an intelligent shutdown control of the asphalt flue gas purification system and the purification method thereof according to the embodiment of the invention;
FIG. 9 is a flow chart of an on-line monitoring unit of an asphalt flue gas purification system and a purification method thereof according to an embodiment of the present invention;
FIG. 10 is a flow chart of a control system of an asphalt flue gas purification system and a purification method thereof according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 9 and 10, the asphalt flue gas purification system provided by the embodiment of the present invention includes a tank area flue gas collection unit, a main building flue gas collection unit, a pretreatment unit, a purification unit, and an induced draft fan, where the induced draft fan is connected to a flue gas output end of the purification unit; and the asphalt flue gas collected by the tank area flue gas collection unit and/or the main building flue gas collection unit is guided to the pretreatment unit by the induced draft fan for pretreatment and is discharged after being purified by the purification unit.
The pretreatment unit comprises a washing device, a demisting device and an electrostatic field generating device which are connected in sequence; the washing device comprises a spray tower or a cyclone tower and is used for dedusting, cooling, deoiling, partially absorbing and the like on the asphalt smoke, the absorption solvent used in the washing device is water or a special absorption agent, and the special absorption agent is used for special components; the demisting device comprises a centrifugal demisting fan or filler demisting, and is mainly used for removing tar particles, water vapor particles and the like in the asphalt smoke after being washed by the washing device; the electrostatic field generating device comprises plate-type static electricity or honeycomb static electricity and is mainly used for removing particles which are not completely removed from the asphalt flue gas after being washed by the washing device and demisted by the demisting device.
The purification unit comprises a UV photo-oxygen photocatalysis device, a plasma discharge device and a UV photo-catalysis device which are connected in sequence; the purification of the UV light oxygen photocatalysis device to the asphalt flue gas specifically comprises the following steps: irradiating by using a 185nm and 254nm double-waveband ultraviolet lamp tube, wherein the double-waveband ultraviolet directly irradiates asphalt smoke to destroy part of organic molecular structures; wherein 185nm ultraviolet rays are rapidly absorbed by O in air2Absorbing to generate active oxygen atoms, wherein the active oxygen atoms and oxygen are converted into ozone under the irradiation of ultraviolet rays, and the ozone has strong oxidizing property and can destroy most of organic waste gas; at the same time, the catalyst is excited under the irradiation of ultraviolet rays to generate electron hole pairs, the water adsorbed on the surface of the hole decomposition catalyst generates hydroxyl radicals, the electrons reduce oxygen around the hydroxyl radicals into active oxygen ions, and the strong oxidizing property of the electrons and the active oxygen ions decomposes organic molecules on the surface of the catalyst; a large amount of ozone, active oxygen, hydroxyl and the like generated after the asphalt flue gas is treated by the UV photo-oxygen photocatalysis device have strong oxidizability, and can purify most of organic molecules in the asphalt flue gas;
in addition, the UV photo-oxygen photocatalysis device is adopted to purify the asphalt flue gas, the humidity of the asphalt flue gas entering the purification unit is higher than that of the flue gas discharged from the chimney, under the condition of low relative humidity, most 185nm ultraviolet light is absorbed by the oxygen, part of water vapor competes with the oxygen to absorb ultraviolet light with the wavelength of 185nm along with the increase of the humidity, more 185nm ultraviolet light is absorbed by the water vapor, more hydroxyl radicals are generated by reaction with active oxygen, and the oxidizability of the hydroxyl radicals is stronger than that of ozone and the active oxygen, so that the photolysis speed is accelerated, and the purification efficiency in unit time is improved. Except for reaction consumption, the ultraviolet rays are released in a heat release process, so that the humidity of the waste gas is reduced, and the low-humidity waste gas enters the plasma discharge device, so that the plasma discharge device is safer. The plasma discharge device adopts a high-frequency high-voltage generator to form plasma, a large amount of water vapor enters the plasma discharge device to easily cause short circuit of equipment, asphalt smoke is treated by a UV photo-oxygen photocatalysis device, most of water vapor is consumed in the UV photo-oxygen photocatalysis process, the moisture content of the asphalt smoke entering the plasma discharge device is reduced, the safety of the plasma discharge device is improved, and the possibility of short circuit spontaneous combustion caused by the fact that the water vapor directly enters the plasma discharge device is reduced;
the plasma discharge device is used for purifying the asphalt flue gas and specifically comprises the following steps: under the action of high-voltage electric field, a great deal of electrons, free radicals and excited molecules (O) are generated3) The active substances have strong oxidizability, and can oxidize and decompose organic molecules in a very short time to generate stable harmless micromolecules such as carbon dioxide, water and the like; corona discharge, low excitation voltage, low energy consumption and better economical efficiency.
The purification of the UV photocatalysis device to the asphalt flue gas is specifically as follows: irradiating with 254nm single-band ultraviolet lamp tube, generating strong oxidizing particles such as electrons, hydroxyl radicals, and active oxygen atoms under the irradiation of ultraviolet, and making full use of residual O generated by the UV photo-oxygen photocatalysis device and the plasma discharge device after treating asphalt flue gas3Active particles such as-OH and the like are used for completing the high-efficiency treatment of the asphalt smoke with the aid of a catalyst; meanwhile, the utilization of ozone reduces the secondary pollution of ozone to the atmosphere.
The asphalt flue gas is treated by the UV photo-oxygen photocatalysis device, the plasma discharge device and the UV photo-catalysis device, and then treated by the activated carbon filter screen to supplement the purification, so that a small amount of escaping organic molecules are trapped, and the standard emission of the asphalt flue gas is ensured.
An air-equalizing filtering unit is also connected between the pretreatment unit and the purification unit, and comprises an air-equalizing plate, a stainless steel wire filtering net and a polyester fiber filtering net which are sequentially connected; the asphalt flue gas treated by the pretreatment unit is treated by the air-equalizing filtering unit, so that particulate matters in the asphalt flue gas can be further removed; meanwhile, the uniform distribution of the airflow can be realized, and the advantage condition is provided for subsequent purification.
The tank field flue gas collecting unit comprises an asphalt heavy oil storage tank, a tank field flue gas collecting branch pipeline and a tank field flue gas collecting main pipeline which are sequentially connected.
The main building smoke collecting unit comprises a stirring smoke collecting device, a finished product bin smoke collecting device and a loading area smoke collecting device, and the stirring smoke collecting device, the finished product bin smoke collecting device and the loading area smoke collecting device are respectively connected to a production smoke collecting main pipeline through respective production smoke conveying pipelines.
The asphalt flue gas purification system also comprises an online monitoring unit, wherein the online monitoring unit comprises a temperature sensor for monitoring the real-time temperature of asphalt heating, a first VOC concentration monitoring unit for monitoring the concentration of VOC in asphalt flue gas output by the tank area flue gas collection unit, a second VOC concentration monitoring unit for monitoring the concentration of VOC in asphalt flue gas output by the main building flue gas collection unit and a third VOC concentration monitoring unit for monitoring the concentration of VOC in asphalt flue gas output by the purification unit; when the VOC concentration in the asphalt flue gas output by the purification unit exceeds the standard, the third VOC concentration monitoring unit automatically prompts and gives an alarm.
This pitch gas cleaning system still includes control system, connect in the first control valve system of the flue gas output of jar district flue gas collection unit and connect in the second control valve system of the flue gas output of main building flue gas collection unit, control system can dispose preprocessing unit and purification unit to can open and stop according to the opening and preprocessing unit and the purification unit of the first control valve system of monitoring result control of on-line monitoring unit, valve in the second control valve system.
As shown in fig. 1, an asphalt flue gas cleaning method of the foregoing asphalt flue gas cleaning system according to an embodiment of the present invention includes the following steps:
judging the selected operation mode, wherein the operation mode comprises the following steps: an asphalt preheating operation mode, a production operation mode, an asphalt heat-preservation operation mode and an asphalt cooling operation mode;
switching an induced draft fan, a demisting device, a washing device, an electrostatic field generating device, a UV photo-oxygen photocatalysis device, a plasma discharging device and the UV photo-catalysis device to a selected operation mode and sequentially starting the devices;
carrying out pretreatment and purification treatment on the collected asphalt smoke in sequence, wherein the pretreatment comprises the following steps: washing, demisting and electrostatic field treatment are carried out on the collected asphalt flue gas; the purification treatment comprises the following steps: and carrying out UV photo-oxygen photocatalytic treatment, plasma discharge treatment and UV photocatalytic treatment on the pretreated asphalt smoke.
As shown in fig. 2, when the function selects the asphalt heating and purifying mode, the asphalt heating and purifying mode is started, and the valves in the first control valve system and the second control valve system are automatically adjusted to the opening degree of the asphalt heating and purifying mode:
step 101: starting a draught fan;
step 102: starting a demisting device;
step 103: starting the washing device;
step 104: starting an electrostatic field generating device;
step 105: starting the UV photo-oxygen photocatalysis device;
step 106: starting the plasma discharge device;
step 107: starting the UV photocatalysis device;
step 108: after the heating and purifying mode is started, a temperature sensor automatically monitors the asphalt heating real-time temperature T of the asphalt heavy oil storage tank;
step 109: judging whether the real-time asphalt heating temperature T is greater than or equal to a set target temperature, and if not, continuing to execute the step 108; if yes, automatically switching to a production operation purification mode;
as shown in fig. 3, when the production operation purification mode is selected or the other modes are automatically switched to the production operation purification mode, the production operation purification mode is started, and the valves in the first control valve system and the second control valve system are automatically adjusted to the opening degrees of the production operation purification mode:
step 201: starting a draught fan;
step 202: starting a demisting device;
step 203: starting the washing device;
step 204: starting an electrostatic field generating device;
step 205: starting the UV photo-oxygen photocatalysis device;
step 206: starting the plasma discharge device;
step 207: starting the UV photocatalysis device;
step 208: after the production operation purification mode is started, the manual control information is input into the monitoring unit to automatically monitor the manual switching information, whether the manual switching information is received or not is judged, and if the manual switching information is not received, the step 208 is continuously executed; if yes, executing the next step;
step 209: judging whether the received manual switching information is asphalt heat preservation, and if so, automatically switching to a heat preservation and purification mode; if the judgment result is no, executing the next step;
step 210: judging whether the received manual switching information is asphalt cooling, and if so, automatically switching to a cooling and purifying mode; if the judgment result is no, executing the next step;
step 211: judging whether the received manual switching information is asphalt heating or not, and if so, automatically switching to a heating and purifying mode; if the judgment result is no, executing the next step;
step 212: judging whether the received manual switching information is in an open mode or not, and if so, automatically switching to the open purification mode; if not, returning to execute the step 208;
as shown in fig. 4, when the asphalt heat-preservation purification mode or other modes are selected to be automatically switched to the asphalt heat-preservation purification mode, the asphalt heat-preservation purification mode is started, and the valves in the first control valve system and the second control valve system are automatically adjusted to the opening degrees of the asphalt heat-preservation purification mode:
step 301: starting a draught fan;
step 302: starting a demisting device;
step 303: starting the washing device;
step 304: starting an electrostatic field generating device;
step 305: starting the UV photo-oxygen photocatalysis device;
step 306: starting the plasma discharge device;
step 307: starting the UV photocatalysis device;
step 308: after the heat preservation and purification mode is started, the manual control information is input into the monitoring unit to automatically monitor the manual switching information, whether the manual switching information is received or not is judged, and if the manual switching information is not received, the step 208 is continuously executed; if yes, executing the next step;
step 309: judging whether the received manual switching information is production operation, and if so, automatically switching to a production operation purification mode; if the judgment result is no, executing the next step;
step 310: judging whether the received manual switching information is asphalt cooling, and if so, automatically switching to a cooling and purifying mode; if the judgment result is no, executing the next step;
step 311: judging whether the received manual switching information is asphalt heating or not, and if so, automatically switching to a heating and purifying mode; if the judgment result is no, executing the next step;
step 312: judging whether the received manual switching information is in an open mode or not, and if so, automatically switching to the open purification mode; if not, returning to the step 308;
as shown in fig. 5, when the asphalt cooling and purifying mode or other modes are selected to be automatically switched to the asphalt cooling and purifying mode, the asphalt cooling and purifying mode is started, and the valves in the first control valve system and the second control valve system are automatically adjusted to the opening degree of the asphalt cooling and purifying mode:
step 401: starting a draught fan;
step 402: starting a demisting device;
step 403: starting the washing device;
step 404: starting an electrostatic field generating device;
step 405: starting the UV photo-oxygen photocatalysis device;
step 406: starting the plasma discharge device;
step 407: starting the UV photocatalysis device;
step 408: the cooling and purifying mode is started, the first VOC concentration monitoring unit automatically monitors the VOC concentration and the air volume in the asphalt flue gas output by the tank area flue gas collection main pipeline, manual control information is input into the monitoring unit to automatically monitor manual switching information, whether the manual switching information is received or not is judged, and if the manual switching information is judged not to be received, the step 409 is continuously executed; if yes, go to step 411;
step 409: judging whether the VOC concentration in the asphalt flue gas output by the tank field flue gas collection main pipeline is less than 10mg/m3If yes, go to step 410; if not, returning to execute the step 408;
step 410: intelligently shutting down and ending the process;
step 411: judging whether the received manual switching information is asphalt heat preservation, and if so, automatically switching to a heat preservation and purification mode; if the judgment result is no, executing the next step;
step 412: judging whether the received manual switching information is production operation, and if so, automatically switching to a production operation purification mode; if the judgment result is no, executing the next step;
step 413: judging whether the received manual switching information is asphalt heating or not, and if so, automatically switching to a heating and purifying mode; if the judgment result is no, executing the next step;
step 414: automatically switching to an open purge mode.
As shown in fig. 8, the intelligent shutdown process of step 410 specifically includes the following steps:
step 4101: turning off the UV photocatalysis device;
step 4102: turning off the plasma discharge device;
step 4103: closing the UV light-oxygen photocatalysis device;
step 4104: after 20 seconds, closing the electrostatic field generating device;
step 4105: after 20 seconds, the washing device is closed;
step 4106: after 1 minute, the demisting device is closed;
step 4107: after 3 minutes, the induced draft fan is closed;
step 4108: and finishing the intelligent shutdown.
As shown in fig. 6, when the open purge mode is selected or the other mode is automatically switched to the open purge mode, the open purge mode is started:
step 501: self-matching and setting system configuration;
step 502: starting a draught fan;
step 503: starting a demisting device;
step 504: starting the washing device;
step 505: starting an electrostatic field generating device;
step 506: starting the UV photo-oxygen photocatalysis device;
step 507: starting the plasma discharge device;
step 508: starting the UV photocatalysis device;
step 509: after the open purification mode is started, the manual control information input monitoring unit automatically monitors the manual switching information, judges whether the manual switching information is received, and if not, continues to execute step 509; if yes, go to step 510;
step 510: judging whether the received manual switching information is asphalt heat preservation, and if so, automatically switching to a heat preservation and purification mode; if the judgment result is no, executing the next step;
step 511: judging whether the received manual switching information is asphalt cooling, and if so, automatically switching to a cooling and purifying mode; if the judgment result is no, executing the next step;
step 512: judging whether the received manual switching information is asphalt heating or not, and if so, automatically switching to a heating and purifying mode; if the judgment result is no, executing the next step;
step 513: judging whether the received manual switching information is production operation, and if so, automatically switching to a production operation purification mode; if the judgment result is no, executing the next step;
step 514: automatically switching to the open purge mode, returning to step 501, and modifying the self-matching configuration again.
As shown in fig. 7, the step 501 of self-matching the setting system specifically includes the following steps:
step 5011: configuring a set washing device;
step 5012: configuring a set defogging device;
step 5013: configuring a set electrostatic field generating device;
step 5014: configuring and setting a UV photo-oxygen photocatalysis device;
step 5015: configuring and setting a plasma discharge device;
step 5016: configuring and setting a UV photocatalysis device;
step 5017: setting the valve opening in the first control valve system;
step 5018: setting the valve opening in the second control valve system;
step 5019: setting the opening degree and frequency of an air door of an induced draft fan;
step 50110: and after the configuration setting is finished, executing the next step.
The invention provides an asphalt flue gas purification system and a logic control method thereof, based on a purification strategy of 'scattered collection and centralized treatment', a flue gas collecting device and a collection pipeline are arranged at a main dissipation point of asphalt flue gas, and a purification process of 'multi-stage pretreatment and multi-stage combined purification technology' is utilized, aiming at the difference of the emission concentration and the emission amount of the asphalt flue gas under various working conditions of an asphalt mixing station, the system is matched with different air quantity and air pressure of an induced draft fan, the starting configuration of asphalt flue gas purification equipment and the like, so that the asphalt flue gas is efficiently purified, one machine is multifunctional and multipurpose, the high-economical operation of the purification equipment is realized, the utilization rate of the equipment is improved, the purchase cost and the operation cost are reduced, and the system is energy-saving and; the asphalt flue gas purification system effectively controls the unorganized emission and organized emission of asphalt flue gas, provides guarantee for green production of users, saves operating cost, and improves the economic benefit of production enterprises.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides an asphalt flue gas purification system which characterized in that: the system comprises a tank area flue gas collection unit, a main building flue gas collection unit, a pretreatment unit, a purification unit and an induced draft fan, wherein the induced draft fan is connected with a flue gas output end of the purification unit; the asphalt flue gas collected by the tank area flue gas collecting unit and/or the main building flue gas collecting unit is guided to a pretreatment unit by a draught fan for pretreatment, and is purified by a purification unit and then discharged;
the pretreatment unit comprises a washing device, a demisting device and an electrostatic field generating device which are connected in sequence;
the purification unit comprises a UV photo-oxidation catalytic device, a plasma discharge device and a UV photo-catalytic device which are sequentially connected.
2. The asphalt flue gas purification system according to claim 1, wherein: the air-equalizing and filtering device is characterized in that an air-equalizing and filtering unit is further connected between the pretreatment unit and the purification unit, and the air-equalizing and filtering unit comprises an air-equalizing plate, a stainless steel wire filter screen and a polyester fiber filter screen which are sequentially connected.
3. The asphalt flue gas purification system according to claim 1, wherein: the tank field flue gas collecting unit comprises an asphalt heavy oil storage tank, a tank field flue gas collecting branch pipeline and a tank field flue gas collecting main pipeline which are sequentially connected.
4. The asphalt flue gas purification system according to claim 1, wherein: the main building smoke collection unit comprises a stirring smoke collection device, a finished product bin smoke collection device and a loading area smoke collection device, wherein the stirring smoke collection device, the finished product bin smoke collection device and the loading area smoke collection device are respectively connected to a production smoke collection main pipeline through respective production smoke conveying pipelines.
5. The asphalt flue gas purification system according to claim 1, wherein: still include the on-line monitoring unit, the on-line monitoring unit is including the temperature sensor who is arranged in monitoring pitch heating real-time temperature, be arranged in monitoring jar district flue gas collection unit output VOC concentration's in the pitch flue gas first VOC concentration monitoring unit, be arranged in monitoring main building flue gas collection unit output VOC concentration's in the pitch flue gas second VOC concentration monitoring unit and be arranged in monitoring purification unit output pitch flue gas VOC concentration's third VOC concentration monitoring unit.
6. The asphalt flue gas purification system according to claim 5, wherein: the system comprises a tank area flue gas collection unit, a first control valve system and a second control valve system, wherein the first control valve system is connected to the flue gas output end of the tank area flue gas collection unit, the second control valve system is connected to the flue gas output end of the main building flue gas collection unit, the control system can configure the pretreatment unit and the purification unit, and can control the opening degree of valves in the first control valve system and the second control valve system and the starting and stopping of the pretreatment unit and the purification unit according to the monitoring result of the online monitoring unit.
7. A method for cleaning asphalt flue gas of the asphalt flue gas cleaning system of any one of claims 1 to 6, wherein the method comprises the following steps:
determining a selected operating mode, the operating mode comprising: an asphalt preheating operation mode, a production operation mode, an asphalt heat-preservation operation mode and an asphalt cooling operation mode;
switching an induced draft fan, a demisting device, a washing device, an electrostatic field generating device, a UV photo-oxygen photocatalysis device, a plasma discharging device and the UV photo-catalysis device to a selected operation mode and sequentially starting the devices;
carrying out pretreatment and purification treatment on the collected asphalt smoke in sequence, wherein the pretreatment comprises the following steps: washing, demisting and electrostatic field treatment are carried out on the collected asphalt flue gas; the purification treatment comprises the following steps: and carrying out UV photo-oxygen photocatalytic treatment, plasma discharge treatment and UV photocatalytic treatment on the pretreated asphalt smoke.
8. The asphalt flue gas purification method according to claim 7, characterized in that: the purification method also comprises the steps of carrying out air equalization and filtration treatment on the asphalt smoke after pretreatment and before purification treatment.
9. The asphalt flue gas purification method according to claim 7, wherein when the real-time temperature of asphalt heating is greater than or equal to a preset target temperature, the operation mode of production operation is automatically switched; when the VOC concentration in the asphalt flue gas output by the tank field flue gas collection unit is lower than the preset target concentration, the asphalt flue gas purification system is closed;
the method for closing the asphalt flue gas purification system comprises the following steps:
closing a UV photocatalysis device, a plasma discharge device and a UV photooxidation photocatalysis device in the purification unit in sequence;
closing the electrostatic field generating device 20 seconds after closing the purification unit;
closing the electrostatic field generating device for 20 seconds, and then closing the washing device;
closing the washing device for 1 minute, and then closing the demisting device;
and closing the induced draft fan after the demisting device is closed for 3 minutes.
10. The method for purifying asphalt flue gas according to claim 7, wherein the method further comprises: and detecting manual switching information, and determining an operation mode according to the manual switching information.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619375A (en) * | 2020-12-02 | 2021-04-09 | 中交二公局第三工程有限公司 | Closed dust absorption exhaust treatment system of pitch mix building |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077395A (en) * | 1992-04-14 | 1993-10-20 | 抚顺石油学院 | A kind of method of asphalt flue gas purifying |
| CN204307503U (en) * | 2014-06-23 | 2015-05-06 | 上海遨提新材料技术咨询有限公司 | A kind of containing dust bitumen flue gas treating apparatus |
| CN104785065A (en) * | 2015-05-13 | 2015-07-22 | 常州禹豪防水科技有限公司 | Asphalt waste gas treatment device and treatment process thereof |
| CN107875846A (en) * | 2017-11-21 | 2018-04-06 | 苏州三可予环保科技有限公司 | A kind of compounding machine organic exhaust gas combined type cleaning system |
| CN207429961U (en) * | 2017-10-16 | 2018-06-01 | 佛山市德麟新材料科技有限公司 | A kind of emission-control equipment for reducing pitch damping board assembly line VOC emission amount |
| CN207462952U (en) * | 2017-10-25 | 2018-06-08 | 上海远盛防水工程有限公司 | A kind of self-adhesion sizing material transport system of waterproof roll production line |
| CN207741241U (en) * | 2017-12-28 | 2018-08-17 | 江苏安纳泰环保科技有限公司 | Plasma and photocatalysis integrated air purification device |
| CN108421377A (en) * | 2018-05-12 | 2018-08-21 | 罗胜楠 | A kind of petroleum asphalt flue gas purifying treatment device |
| CN108525490A (en) * | 2018-06-01 | 2018-09-14 | 岑溪市东正动力科技开发有限公司 | A kind of alkaline washing tower for asphalt tail gas processing |
| CN109224791A (en) * | 2018-08-09 | 2019-01-18 | 三汽车制造有限公司 | Bitumen flue gas processing system |
| CN208436600U (en) * | 2018-12-25 | 2019-01-29 | 烟台盛泽环保科技有限公司 | A kind of bituminous mixing plant exhaust treatment system |
| CN110252072A (en) * | 2019-07-23 | 2019-09-20 | 苏州罗克韦尔智能科技有限公司 | A kind of off-gas cleaning equipment |
-
2019
- 2019-09-24 CN CN201910902541.6A patent/CN110614029A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077395A (en) * | 1992-04-14 | 1993-10-20 | 抚顺石油学院 | A kind of method of asphalt flue gas purifying |
| CN204307503U (en) * | 2014-06-23 | 2015-05-06 | 上海遨提新材料技术咨询有限公司 | A kind of containing dust bitumen flue gas treating apparatus |
| CN104785065A (en) * | 2015-05-13 | 2015-07-22 | 常州禹豪防水科技有限公司 | Asphalt waste gas treatment device and treatment process thereof |
| CN207429961U (en) * | 2017-10-16 | 2018-06-01 | 佛山市德麟新材料科技有限公司 | A kind of emission-control equipment for reducing pitch damping board assembly line VOC emission amount |
| CN207462952U (en) * | 2017-10-25 | 2018-06-08 | 上海远盛防水工程有限公司 | A kind of self-adhesion sizing material transport system of waterproof roll production line |
| CN107875846A (en) * | 2017-11-21 | 2018-04-06 | 苏州三可予环保科技有限公司 | A kind of compounding machine organic exhaust gas combined type cleaning system |
| CN207741241U (en) * | 2017-12-28 | 2018-08-17 | 江苏安纳泰环保科技有限公司 | Plasma and photocatalysis integrated air purification device |
| CN108421377A (en) * | 2018-05-12 | 2018-08-21 | 罗胜楠 | A kind of petroleum asphalt flue gas purifying treatment device |
| CN108525490A (en) * | 2018-06-01 | 2018-09-14 | 岑溪市东正动力科技开发有限公司 | A kind of alkaline washing tower for asphalt tail gas processing |
| CN109224791A (en) * | 2018-08-09 | 2019-01-18 | 三汽车制造有限公司 | Bitumen flue gas processing system |
| CN208436600U (en) * | 2018-12-25 | 2019-01-29 | 烟台盛泽环保科技有限公司 | A kind of bituminous mixing plant exhaust treatment system |
| CN110252072A (en) * | 2019-07-23 | 2019-09-20 | 苏州罗克韦尔智能科技有限公司 | A kind of off-gas cleaning equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619375A (en) * | 2020-12-02 | 2021-04-09 | 中交二公局第三工程有限公司 | Closed dust absorption exhaust treatment system of pitch mix building |
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