CN105664631B - The fume purifier of fume of microwave plasma torch - Google Patents
The fume purifier of fume of microwave plasma torch Download PDFInfo
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- CN105664631B CN105664631B CN201610055225.6A CN201610055225A CN105664631B CN 105664631 B CN105664631 B CN 105664631B CN 201610055225 A CN201610055225 A CN 201610055225A CN 105664631 B CN105664631 B CN 105664631B
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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
- B01D53/32—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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0275—Other waste gases from food processing plants or kitchens
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Abstract
The present invention proposes a kind of fume purifier of fume of microwave plasma torch, oil smoke and air are passed through in purifying box and mixed, stable high-temperature plasma body region is produced using the microwave plasma torch array in purifying box, high energy impact is carried out to the organic molecule being harmful in oil smoke, its original molecular link is opened, the small-molecule substance encouraged by high-energy is converted into the clean final product such as carbon dioxide and water in oxygen-enriched environment, reach the purpose of purifying oil fume, the device of the present invention can be according to oil smoke throughput and the size of concentration, the power distribution of adjust automatically plasma torch array, lift treatment effect and efficiency of energy utilization, according to the remaining oxygen detected value of discharge tube after purification, adjust air magnitude of recruitment, ensure the fully oxidized of organic pollution in oil smoke, ensure purified treatment rate.
Description
Technical field
The present invention relates to technology for cooking fume control field, more particularly to a kind of fume purifier of fume of microwave plasma torch.
Background technology
Thermal decomposition and oxidation Decomposition can occur in heating process and a large amount of volatility are produced and fixedness is organic for oils
Thing, its main component is aldehyde, ketone, hydrocarbon, aliphatic acid, alcohol, aromatic compound, ketone, lactone, heterocyclic compound etc..Numerous studies
Show, the probability that the long-term people being exposed in oil smoke surroundings suffers from breathing problem is no less than long-term smoker, can also trigger a variety of
It is mutated illness.Therefore, country formulates《Cooking fume discharge standard》GB18483-2001, to cooking fume purified treatment
Discharge is made that corresponding specification.To go the poisonous and harmful substance in fume eliminating, discharge is set to reach national corresponding standard, oil smoke
Clearing machine is widely used in the places such as hotel, restaurant, wineshop, dining room and school, office, factory；Food frying, culinary art add
Industrial and commercial bank's industry；The industrial occasions such as oil splashing heat treatment workshop, oil mist lubrication workshop, workpiece welding workshop and olefine oil boiler emission.
At present, common oil-fume purification treatment device and its technique have following several：Cooking fume-collecting cover：Received using simple cover
Oil smoke, outdoor is discharged to by exhaust fan by oil smoke collection, only collects discharge oil smoke.Hydro-vent：Using alkali lye as detergent, lead to
The mode for crossing spray is contacted with oil smoke by fume purifying, is then collected and discharged by air exhauster.Water spray scrubbing tower purification technique：
Purify, then discharged by air exhauster by the way of petticoat pipe collects feeding absorption tower (spray, sieve plate, filler).High-pressure electrostatic
(plasma) is purified：Using the gas ionization under high pressure and electric field action power, separated after making grit charged from gas.Physics mistake
Filter：One of silk screen, activated carbon, steel wire are several compound.Photocatalysis：The mist of oil of oil-containing gases is decomposed using ultraviolet light.
Biological cleaning：Using thermophilic oily microorganism by the mist of oil decomposing, purifying in oil smoke.Liquid foam is washed：Using mass transfer double-film theory, physics,
The combination product of chemical method, electromechanical integrated product.
However, existing cooking fume purification handling technique faces following some shortcomings at present.1) oil smoke clearance is low：Oil smoke is received
The oil smoke clearance for collecting the processing methods such as cover, hydro-vent, physical filtering is relatively low, and still remaining has substantial amounts of oil in the gas of discharge
Cigarette composition, environmental pollution is serious.In addition, some purification methods are low to certain class composition purification efficiency in oil smoke, such as liquid foam is washed
Purification efficiency to mist droplet is relatively low, there is secondary pollution.2) device structure is complicated：As Water spray scrubbing tower purification technique is set
Standby installing space is big, system complex, causes its occasion applied to receive certain constraint.3) technical sophistication, equipment cost is high：
Technical difficulty as needed for photocatalysis, living things catalysis is big, and cost is higher, and high-pressure electrostatic method equipment investment is costly,
Using being subject to certain restrictions.4) maintenance period is short, and difficulty is big：As High-voltage electrostatic purification needs to clean every two weeks once, physics
Filtering need to be cleaned weekly, and biological cleaning needs periodically processing to update, and the washing of liquid foam often need to do a blowdown using 2~3 days, add
Plus the work of professional cleanser, the oil smoke cleaning on high-pressure electrostatic method passive electrode is difficult, and easily causes secondary pollution, these
Periodic maintenance, which works, result in the rising of cost and Master Cost.
At present, in Publication No. CN105148693A Chinese invention patent application file《A kind of oil smoke organic matter purification
Method》In, it is proposed that a kind of oil smoke organic matter purification method, this method is passed through in the way of constantly circulating air from outside to treating
In treatment region so that oil smoke organic matter and oxygen are sufficiently mixed in the physical sense, the mixing oil smoke organic matter is passed through into microwave
The plasma torch that plasmatorch device is produced, collides with high energy electron, is broken molecular link therein, and with activity certainly
Reacted by base and generate CO2And H2O, the oil smoke discharge after most handling at last is to outside lampblack absorber.This method can effectively remove fume eliminating
In harmful components, reach the effect of oil smoke efficient process, but it is not directed to the detailed configuration of fume purifier of fume, patrolled
Control flow and specific design are collected, how stable high-temperature plasma body region is produced using microwave plasma torch array, such as
What ensures oil smoke treatment effect etc. by power adjusting and inlet air flow rate regulation.
In addition, Authorization Notice No. is CN200966972Y Chinese utility model patent file《Plasma welds smoke waste gas
Clearing machine》And the Chinese utility model patent file that Authorization Notice No. is the U of CN 204365116《Plasma Industry oil smoke is net
Change machine》, a kind of plasma gas clearing machine is each provided, both cleaning principles are based on micropulse plasma power supply,
Plasma is produced by corona discharge, this electric discharge is resulted between two electrodes, makes the electronics and oxygen molecule of acquisition energy
Generation inelastic collision, electronics gives oxygen molecule energy transfer, and gas is activated, and directly opens the molecule between gas molecule
Key, makes pernicious gas be decomposed into simplest molecule, is aoxidized so as to be degraded to the oxious component in waste gas, dispelling abnormal flavor.Wherein,
《Plasma Industry smoke purifier》Be《Plasma welds smoke waste gas clearing machine》On the basis of improved, it is net in electric field
Change and catalysis oxidation filter layer is installed after layer, reacted using oxidant with the organic pollution in oil smoke, its final product is CO2
And H2O.However, producing plasma using corona discharge process needs to work under peak voltage, it is not easy to stablized
Corona discharge, reactor is also easy to produce local arc discharge, not only increases power consumption, and the progress of destruction regular picture,
Purification efficiency is caused to reduce；Further, since electrode is exposed in the oil flue waste gas of various impurity for a long time in device, easily by dirt
Dye, cleaning is difficult, and maintenance period is short, and cost is high；And be present problem of aging, it is necessary to regularly replace in the use of catalyst, increase
Cooking fume purification handling cost.
The content of the invention
Present invention aims at a kind of fume purifier of fume of microwave plasma torch is provided, oil smoke can be made in plasma
Fully decomposed in torch array with aoxidizing, significantly improve cooking fume purification handling rate, conventional plasma fume purifying can be prevented effectively from
The problem of machine electrode pollutes, it is easy to safeguard, and the power consumption of each plasma torch is automatically adjusted, effectively reduction energy disappears
Consumption.
To solve the above problems, the present invention proposes a kind of fume purifier of fume of microwave plasma torch, including：For leading to
Enter the oil smoke inlet duct of oil smoke, the air inlet duct for being passed through air, for what is received and mix air and oil smoke
Provided with the plasma torch array for purifying oil fume in purifying box, the purifying box, the purifying box, which is provided with, to be used to purify
The discharge tube of gas output, in addition to purification power control system and air flow control system；
The purification power control system includes the oil smoke flow detector and oil being located on the oil smoke inlet duct
Oil smoke inlet flow rate and oil smoke concentration detection that smoke density detection means and the reception oil smoke flow detector are surveyed
The plasma torch array controller for the oil smoke entrance concentration that device is surveyed, the plasma torch array controller is according to oil smoke
Inlet flow rate and oil smoke entrance concentration optimize and revise the power of each plasma torch；
The air flow control system includes the air flow rate detecting device and sky being located on the air inlet duct
Flow control valves, the residual oxygen detection means being located on the discharge tube and the reception air flow rate detecting device are surveyed
Air mass flow and the air flow controller of air remaining oxygen surveyed of the residual oxygen detection means, the air flow control
Device adjusts the aperture of the air flow control valve according to the air mass flow and air remaining oxygen surveyed.
According to one embodiment of present invention, the plasma torch array includes multiple plasma torch, plasma
Torch passs rank distribution composition array by interlocking up and down.
According to one embodiment of present invention, the plasma torch array includes ten plasma torch, and up and down each five
It is individual and be staggeredly arranged.
According to one embodiment of present invention, the plasma torch array controller by set up oil smoke inlet flow rate,
Model for Multi-Objective Optimization after the power and purification of oil smoke entrance concentration and plasma torch between oil smoke concentration, according to heredity calculation
Method solves optimal value, adjusts the power of each plasma torch；The Model for Multi-Objective Optimization includes：
Determine decision variable：The power p of each plasma torch1,p2,p3,…,pN；
Set up object function：
Minimize energy consumption function
Maximize oil smoke purifying rate function
Constraints is set：
pi_LO≤pi≤pi_UPI=1,2,3 ..., N
α '=f (α, v, p1,p2,...,pN)
Wherein, pi_LO、pi_UPFor the lower limit of the power setting of each plasma torch, the upper limit, function f reflects oil smoke entrance
Flow v, oil smoke entrance concentration α and each plasma torch power p1,p2,p3,…,pNTo the shadow of oil smoke concentration α ' after purification
Ring.
According to one embodiment of present invention, the air flow control system is Closed-loop Cascade feedback control system, interior
The controlled variable that ring is controlled is air mass flow, and control variable is the aperture of air flow control valve, the controlled variable of outer shroud control
For the air remaining oxygen of discharge tube, control variable is air mass flow, and the Closed-loop Cascade feedback control system includes：
The residual oxygen detection means, detects the air remaining oxygen of the purifying box discharge tube and is fed back to the first ratio
Compared with device；
The first comparator, relatively the air remaining oxygen and residual oxygen setting value, export residual oxygen fiducial value；
Residual oxygen PID controller, receives the residual oxygen fiducial value, is set according to the residual oxygen fiducial value or regulation air mass flow
Setting value；
Air flow rate detecting device, detects the air mass flow of the purifying box porch and is fed back to second and compare
Device；
Second comparator, the air mass flow and air mass flow setting value of relatively more described porch, delivery air flow
Fiducial value；
Flow PID controller, receives the air mass flow fiducial value, according to air mass flow fiducial value output regulation control
Signal processed；
The air flow control valve, changes aperture, so as to change the purifying box according to the regulation control signal
The air mass flow of air inlet duct.
According to one embodiment of present invention, the entrance connecting reducing pipe of the purifying box, the miner diameter end of the reducer pipe
The outlet of the oil smoke inlet duct and the outlet of the air inlet duct are connected, the bigger diameter end connection of the reducer pipe is described
The entrance of purifying box.
According to one embodiment of present invention, it is provided with equal drift net close to purifying box porch in the purifying box.
According to one embodiment of present invention, set in the purifying box at the position before the plasma torch array
There is oil smoke separate mesh, for screening a certain size the particulate matter gone in fume eliminating.
According to one embodiment of present invention, oil smoke collector is set in the lower section of the oil smoke separate mesh, for collecting
The particulate matter of net filtration is separated with storage oil smoke.
According to one embodiment of present invention, double air intake centrifugal blower fans are provided with the exit of the purifying box, it is net to help
Gas after change is discharged from discharge tube.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：Oil smoke and air are led to
Enter mixing in purifying box, stable high-temperature plasma body region is produced using the microwave plasma torch array in purifying box, it is right
The organic molecule being harmful in oil smoke carries out high energy impact, its original molecular link is opened, the small molecule thing encouraged by high-energy
Matter is converted into the clean final product such as carbon dioxide and water in oxygen-enriched environment, reaches the purpose of purifying oil fume, of the invention
Device can be according to oil smoke throughput and the size of concentration, the power distribution of adjust automatically plasma torch array, lifting processing effect
Fruit and efficiency of energy utilization, according to the air remaining oxygen detected value of the discharge tube after purification, adjust air magnitude of recruitment, it is ensured that oil
Organic pollution is fully oxidized in cigarette, it is ensured that purified treatment rate.
Brief description of the drawings
Fig. 1 is the structural representation of the fume purifier of fume one side of the microwave plasma torch of the embodiment of the present invention；
Fig. 2 is the structural representation of the fume purifier of fume another side of the microwave plasma torch of the embodiment of the present invention；
Fig. 3 is the structural representation of the microwave plasma torch of the embodiment of the present invention；
Fig. 4 is the structured flowchart of the purification power control system of the embodiment of the present invention；
Fig. 5 is the structured flowchart of the air flow control system of the embodiment of the present invention；
Fig. 6 is the oil smoke total concentration clean-up effect schematic diagram of the embodiment of the present invention；
Fig. 7 be the embodiment of the present invention oil smoke in main organic components clean-up effect schematic diagram.
Description of symbols in figure：
1- oil smoke inlet ducts, 2- oil smoke flow detectors, 3- oil smoke concentration detection apparatus, 4- reducer pipes, 5- air
Flow detector, 6- air flow control valves, 7- air inlet ducts, 8- oil smoke collectors, 9- control systems, 10- powers
System, 11- purifying boxs, the residual oxygen detection means of 12-, the equal drift nets of 13-, 14- oil smoke separate meshes, 15- plasma torch arrays, 16-
Double air intake centrifugal blower fans, 17- microwave sources, 19- transmission devices, 20- torch pipes, 21- coupled antennas, 22- mechanical tuning devices, 23- first
Comparator, the comparators of 24- second, 91- plasma torch array controllers, the residual oxygen PID controllers of 92-, 93- flow PID controls
Device.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Many details are elaborated in the following description to fully understand the present invention.But the present invention can be with
Much it is different from other manner described here to implement, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
Referring to Fig. 1 and Fig. 2, the fume purifier of fume of the microwave plasma torch of the present embodiment, including purifying box 11, oil smoke
Inlet duct 1, air inlet duct 7 and discharge tube (exhaust outlet of purifying smoke).
Wherein, oil smoke inlet duct 1 and air inlet duct 7 are connected to the porch of purifying box 11, oil smoke inlet duct 1
The oil smoke of collection is passed into purifying box 11, air is cyclically passed into purifying box 11 by air inlet duct 7, in purification
In case 11, air and oil smoke are sufficiently mixed, and plasma torch array 15 is provided with purifying box 11, and the flue gas of mixing passes through plasma
The plasma flame of body torch array 15 is cleaned, and the flue gas after purification is discharged from discharge tube.
In one embodiment, referring to Fig. 1, the entrance connecting reducing pipe 4 of purifying box 11, the miner diameter end connection of reducer pipe 4
The outlet of oil smoke inlet duct 1 and the outlet of air inlet duct 7, the bigger diameter end of reducer pipe 4 connect the entrance of purifying box 11.
The exit of purifying box 11 equally can be with connecting reducing pipe.
Preferably, referring to Fig. 2, equal drift net 13 is provided with close to the porch of purifying box 11 in purifying box 11, make to enter purification
Oil smoke flow in case 11 keeps relatively uniform, it is ensured that the stability of processing procedure, can improve plasma in purifying box 11
The oil smoke handling rate of torch array 15.
Preferably, referring to Fig. 2, purifying box 11 is interior to be provided with oil smoke separate mesh at the position before plasma torch array 15
14, for screening a certain size the particulate matter gone in fume eliminating, realize that the screening to larger particles in oil smoke is removed, prevent oil
Solid particle and other impurities in cigarette enter plasma torch array 15, and then influence microwave plasma torch array 15 just
Often work.Oil smoke separate mesh 14 can be arranged on after equal drift net 13.
Referring to Fig. 1, oil smoke collector 8 can be set in the lower section of oil smoke separate mesh 14, for collecting and storing oil smoke point
The particulate matter that off-network 14 is filtered.
Referring to Fig. 2, double air intake centrifugal blower fans 16 are provided with the exit of purifying box 11, to help purified gas from discharge
Pipeline is discharged.
The entitled MPT of microwave plasma torch English, is a kind of plasma source of open architecture, microwave plasma flare
Can produce compared with from center and peripheral temperature, when processed object (oil smoke) of the plasma attack of HTHP, quilt
The molecular link of processed material is broken, meanwhile, containing free radicals such as a large amount of O, OH for being encouraged and being produced by high-energy in plasma,
C contained by organic matter, H element are eventually converted into CO2And H2The harmless products such as O, are achieved in the purification of oil smoke.
Wherein, plasma torch array 15 includes multiple plasma torch, and plasma torch is passed rank by interlocking up and down and is distributed
Constitute array.Specifically, referring to Fig. 2, plasma torch array includes ten plasma torch, up and down each five and the cloth that staggers
Put, i.e., above and below plasma torch flame it is relative and mutually stagger.Oil smoke to be clean sequentially pass through ten microwaves etc. from
Daughter torch, it can be ensured that organic molecule is substantially oxidized in oil smoke, and then improve cooking fume purification handling rate.
As shown in figure 3, microwave plasma torch can include torch pipe 20, microwave source 17, control system 9, transmission device 19.
The frequency that microwave source 17 is used is 2.45GHz, produces microwave electromagnetic field and provides microwave energy for microwave plasma torch.Microwave passes through
One conductor loop being looped around in torch pipe 20 is coupled in plasma working gas.Plasma is in the position close to torch pipe top
Put to be formed, and from stretching to external expansion at the top of torch pipe, form the microwave plasma similar to flame, plasma torch can be with
Including for tuning the mechanical tuning device 22 of microwave.The principle process of harmful organic substances process is such as in plasma degradation oil smoke
Under：
The first step：Gas field ionization, by microwave source excitation, a small amount of electrons gain energy present in gas is and gaseous
Molecule or atom collide, and bring it about ionization, while producing new electronics again；
Second step：Excited state particle and free radical are formed, and the electronics in plasma is collided with organic molecule, and energy is passed
The latter is passed, free radical is produced, some organic molecules dissociation forms the shorter free radical of carbochain；
3rd step：The particle de excitation of a part of excitation state, free radical is combined again, and is released energy；
4th step：Chemical reaction between active particle, free radical and the oxidative free radical of carbon containing key react, and make organic
Thing finally degrades, is oxidized to CO, CO2And H2O；
5th step：CO complete oxidations in oxygen environment is crossed, ultimately generate CO2。
To realize that plasma torch, to changed power, gas flow change and the adaptive adjustment of other disturbing factors, is adopted
The feedback information of torch pipe 20 is obtained with coupled antenna 21, the reflection power value in feedback information is extracted and control is fed back to
System 9, control system 9 calculates control signal amount according to reflection power value, and semaphore, transmission device 19 are sent to transmission device 19
Mechanical tuning device 22 is driven to move.Microwave plasma torch can be according to the change of gas, and the change of flow, the change of power is right
Torch pipe 20 is adjusted, and makes its work under the optimal condition, is particularly suited for constituting the controllable microwave plasma torch battle array of power
Row 15.
The present invention produces plasma using microwave plasma torch array, is produced with the low temperature plasma such as corona discharge
Method is compared, the problem of can avoiding electrode fouling, meanwhile, microwave plasma torch excites ability strong, divides by rank is staggeredly passed up and down
After cloth composition array, the stable large range of heating region of covering can be formed, it can be ensured that harmful point in oil smoke
Sub fully plasma, it is ensured that fume purifying rate.
With continued reference to Fig. 1 and Fig. 2, the fume purifier of fume of the microwave plasma torch of the present embodiment also includes purification power
Control system and air flow control system.Control system in Fig. 1 can include the control of microwave plasma torch array
The control unit of system, purification power control system and air flow control system grades.In purifying box 11, power supply is also provided with
System 10, it will be understood that control system 9 and electric power system 10 are isolated with the fume purifying region of purifying box 11.
Purification power control system includes oil smoke flow detector 2 and the oil smoke concentration being located on oil smoke inlet duct 1
What the oil smoke inlet flow rate and oil smoke concentration detection apparatus 3 that detection means 3 and reception oil smoke flow detector 2 are surveyed were surveyed
The plasma torch array controller 91 of oil smoke entrance concentration, plasma torch array controller 91 according to oil smoke inlet flow rate and
Oil smoke entrance concentration optimizes and revises the power of each plasma torch.
In one embodiment, referring to Fig. 4, plasma torch array controller 91 is examined according to oil smoke flow detector 2
The oil smoke entrance concentration α that oil smoke inlet flow rate v, the oil smoke concentration detection apparatus 3 measured is detected, calculating plasma torch array
The power assignment value of 15 total performance numbers and each plasma torch, is exported to each plasma torch, makes purifier work energy
Consumption and clean-up effect reach optimal poised state, improve efficiency of energy utilization.Specifically, plasma torch array controller
91 is more between oil smoke concentration after oil smoke inlet flow rate, the power of oil smoke entrance concentration and plasma torch and purification by setting up
Objective optimization model, according to genetic algorithm for solving optimal value, adjusts the power of each plasma torch.Model for Multi-Objective Optimization bag
Include：
Determine decision variable：The power p of each plasma torch1,p2,p3,…,pN；
Set up object function：
Minimize energy consumption function
Maximize oil smoke purifying rate function
Constraints is set：
pi_LO≤pi≤pi_UPI=1,2,3 ..., N
α '=f (α, v, p1,p2,...,pN)
Wherein, pi_LO、pi_UPFor the lower limit of the power setting of each plasma torch, the upper limit, function f reflects oil smoke entrance
Flow v, oil smoke entrance concentration α and each plasma torch power p1,p2,p3,…,pNTo the shadow of oil smoke concentration α ' after purification
Ring.
Model for Multi-Objective Optimization solution is the multi-objective optimization question of a standard, can solve this using genetic algorithm and ask
Topic, obtains the power assignment value of each plasma torch.
Oil smoke flow detector 2 can use ultrasonic flowmeter, on oil smoke inlet duct 1, to real-time
Porch oil smoke flow is detected, and the value detected is input to plasma torch array controller.
Oil smoke concentration detection apparatus 3 can use oil smoke concentration data acquisition unit, on oil smoke inlet duct 1, use
To detect porch oil smoke concentration in real time, and the value detected is input to plasma torch array controller.
To provide oxygen-enriched environment to the work of the fume purifying of plasma torch array 15, it is ensured that organic matter is abundant in oil smoke
Oxidation, can supplement air with air circulation device to plasma torch array 15.The aspiration pressure of air inlet duct 7 is by pneumatics
Stand or other equipment is provided.
Referring to Fig. 1, air flow control system includes the air flow rate detecting device 5 and sky being located on air inlet duct
The sky that flow control valves 6, the residual oxygen detection means 12 being located on discharge tube and reception air flow rate detecting device 5 are surveyed
The air flow controller for the air remaining oxygen that throughput and residual oxygen detection means 12 are surveyed, air flow controller is according to being surveyed
Air mass flow and discharge tube on remaining oxygen regulation air flow control valve 6 aperture.
Referring to Fig. 5, air flow control system is Closed-loop Cascade feedback control system, and the controlled variable that inner ring is controlled is sky
Throughput, control variable is the aperture of air flow control valve 6, and the controlled variable that outer shroud is controlled is air remaining oxygen, and control becomes
Amount is air mass flow.
Closed-loop Cascade feedback control system includes：Residual oxygen detection means 12, detects the residual oxygen of air of purifying box discharge tube
Measure and be fed back to first comparator 23；First comparator 23, compares air remaining oxygen and residual oxygen setting value, exports residual oxygen ratio
Relatively it is worth；Residual oxygen PID controller 92 (Proportion Integration Differentiation, proportional-integral-differential control
Device processed), residual oxygen fiducial value is received, air mass flow setting value is set or adjusted according to residual oxygen fiducial value；Air flow rate detecting device
5, the air mass flow of detection purifying box 11 porch is simultaneously fed back to the second comparator 24；Second comparator 24, compares entrance
The air mass flow and air mass flow setting value at place, delivery air flow fiducial value；Flow PID controller 93, receives air mass flow
Fiducial value, according to air mass flow fiducial value output regulation control signal；Air flow control valve 6, according to regulation control signal
Change aperture, so as to change the air mass flow of the air inlet duct of purifying box 11.Air flow controller includes residual oxygen PID control
Device 92 and flow PID controller 93.
The present invention can be according to the size of oil smoke intake and oil smoke concentration, the power of adjust automatically plasma torch array
Distribution and output, make equipment operating power consumption and clean-up effect reach optimal poised state, are ensureing the premise of fume purifying rate
Under, equipment energy consumption is effectively reduced, efficiency of energy utilization is improved.In addition, the present invention is according to exit remaining oxygen detected value, with string
Level control algolithm adjustment air magnitude of recruitment, this method belongs to Closed loop Control, compared to existing opened loop control, it can be ensured that
Oxygen-enriched environment, makes the fully oxidized of organic matter in oil smoke, without the catalytic oxidizing equipment used using prior art, effectively drop
The maintenance cost of low equipment.
Air flow rate detecting device 5 can be selected with pressure compensated snail street flowmeter, installed in air inlet duct 7
On, air mass flow is measured in real time, is used as the feedback quantity input air flow control system of inner ring in cascade control system.
Residual oxygen detection means 12 can select the online oxygen analyzer device of zirconium oxide, on discharge tube, Ke Yishi
When measure purification after the completion of cooking fume in oxygen content, send air flow controller to, be used as cascade control system China and foreign countries
The feedback quantity of ring.
Air flow control valve 6 can select electronic single-seat adjusting valve.
Below by way of one group of cooking fume purification handling experiment, illustrate beneficial effects of the present invention.In experiment, in room temperature and normal pressure
Under the conditions of, oil smoke exhaust air rate is maintained at 1000m3/h；Start microwave plasma torch fume purifier of fume and run half an hour, it is right
Oil smoke concentration at purifier entrance and exit of the invention carries out on-line analysis and statistics in this time, and the sampling period is
10s.Wherein, the statistics of oil smoke concentration includes total oil smoke concentration, and main several type organics contained by it concentration.Statistics
As a result as shown in Figure 6, Figure 7.
As shown in Figure 6, although there is dynamic fluctuation, oil smoke total concentration significantly drops after the purifier by the present invention
Low, oil smoke removal efficiency reaches 80% or so.
As shown in fig. 7, after purifier purified treatment of the invention, the main organic components of several classes in oil smoke,
Such as acetic acid C2H4O2, hexanal C6H12O, heptenal C7H12O, decadienal C10H16O isoconcentrations occur in that different degrees of notable
Reduction, demonstrates the fume purifying ability of the purifier of the present invention.
The purification power of microwave plasma torch array of the present invention has controllability, i.e., dense according to oil smoke intake and oil smoke
The size of degree, power distribution and output using control algolithm adjust automatically plasma torch array, make equipment operating power consumption and
Clean-up effect reaches optimal poised state, on the premise of fume purifying rate is ensured, effectively reduces equipment energy consumption.Root of the present invention
According to the residual oxygen detected value in purifying box exit, adjusting air magnitude of recruitment with serials control algorithm, there is provided oxygen-enriched environment, it is ensured that oil smoke
Middle organic matter it is fully oxidized, final purification product be H2O and CO2。
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the present invention
The scope that protection domain should be defined by the claims in the present invention is defined.
Claims (9)
1. a kind of fume purifier of fume of microwave plasma torch, it is characterised in that including：Oil smoke entrance for being passed through oil smoke
Pipeline, the air inlet duct for being passed through air, for the purifying box for receiving and mixing air and oil smoke, the purifying box
The interior plasma torch array being provided with for purifying oil fume, the purifying box is provided with the delivery pipe for being used for exporting purification gas
Road, in addition to purification power control system and air flow control system；
The oil smoke flow detector and oil smoke that the purification power control system includes being located on the oil smoke inlet duct are dense
Oil smoke inlet flow rate and the oil smoke concentration detection apparatus that degree detection means and the reception oil smoke flow detector are surveyed
The plasma torch array controller for the oil smoke entrance concentration surveyed, the plasma torch array controller is according to oil smoke entrance
Flow and oil smoke entrance concentration optimize and revise the power of each plasma torch；
The air flow control system includes the air flow rate detecting device and air stream being located on the air inlet duct
The sky that control valve, the residual oxygen detection means being located on the discharge tube and the reception air flow rate detecting device are surveyed
The air flow controller for the air remaining oxygen that throughput and the residual oxygen detection means are surveyed, the air flow controller root
The aperture of the air flow control valve is adjusted according to the air mass flow and air remaining oxygen surveyed；
The plasma torch array controller is by setting up the work(of oil smoke inlet flow rate, oil smoke entrance concentration and plasma torch
Model for Multi-Objective Optimization after rate and purification between oil smoke concentration, according to genetic algorithm for solving optimal value, adjusts each plasma
The power of torch；The Model for Multi-Objective Optimization includes：
Determine decision variable：The power p of each plasma torch1,p2,p3,…,pN；
Set up object function：
Minimize energy consumption function
Maximize oil smoke purifying rate function
Constraints is set：
pi_LO≤pi≤pi_UPI=1,2,3 ..., N
α '=f (α, v, p1,p2,...,pN)
Wherein, pi_LO、pi_UPFor the lower limit of the power setting of each plasma torch, the upper limit, function f reflects oil smoke inlet flow rate
V, oil smoke entrance concentration α and each plasma torch power p1,p2,p3,…,pNInfluence to oil smoke concentration α ' after purification.
2. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that the plasma torch
Array includes multiple plasma torch, and plasma torch passs rank distribution composition array by interlocking up and down.
3. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that the plasma torch
Array includes ten plasma torch, each five and is staggeredly arranged up and down.
4. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that the air mass flow control
System processed is Closed-loop Cascade feedback control system, and the controlled variable that inner ring is controlled is air mass flow, and control variable is air mass flow
The aperture of control valve, the controlled variable that outer shroud is controlled is the air remaining oxygen of discharge tube, and control variable is air mass flow, described
Closed-loop Cascade feedback control system includes：
The residual oxygen detection means, detects the air remaining oxygen of the purifying box discharge tube and is fed back to first and compare
Device；
The first comparator, relatively the air remaining oxygen and residual oxygen setting value, export residual oxygen fiducial value；
Residual oxygen PID controller, receives the residual oxygen fiducial value, is set according to the residual oxygen fiducial value or regulation air mass flow setting
Value；
Air flow rate detecting device, detects the air mass flow of the purifying box porch and is fed back to the second comparator；
The air mass flow and air mass flow setting value of second comparator, the relatively porch, delivery air flow-rate ratio compared with
Value；
Flow PID controller, receives the air mass flow fiducial value, according to air mass flow fiducial value output regulation control letter
Number；
The air flow control valve, changes aperture, so as to change the purifying box air according to the regulation control signal
The air mass flow of inlet duct.
5. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that the purifying box enters
Mouth connecting reducing pipe, the miner diameter end of the reducer pipe connects the outlet of the oil smoke inlet duct and the air inlet duct
Outlet, the bigger diameter end of the reducer pipe connects the entrance of the purifying box.
6. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that leaned in the purifying box
Equal drift net is provided near net tank inlet.
7. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that in the purifying box
Oil smoke separate mesh is provided with position before the plasma torch array, for screening a certain size gone in fume eliminating
Grain thing.
8. the fume purifier of fume of microwave plasma torch as claimed in claim 7, it is characterised in that in oil smoke separation
The lower section of net sets oil smoke collector, and the particulate matter of net filtration is separated for collecting and storing oil smoke.
9. the fume purifier of fume of microwave plasma torch as claimed in claim 1, it is characterised in that in the purifying box
Exit is provided with double air intake centrifugal blower fans, to help purified gas to be discharged from discharge tube.
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| CN107754572A (en) * | 2017-11-21 | 2018-03-06 | 清华大学 | A kind of microwave plasma industrial organic exhaust gas processing system |
| CN109316924B (en) * | 2017-12-14 | 2023-06-27 | 深圳市科延机电有限公司 | Multistage flue gas purifying device and purifying method |
| CN114471066A (en) * | 2020-10-23 | 2022-05-13 | 陕西青朗万城环保科技有限公司 | Microwave denitration method and control system thereof |
| CN112947174B (en) * | 2021-02-03 | 2023-04-07 | 昆明理工大学 | Intelligent microwave reactor system capable of expanding multi-microwave-source cooperative output |
| CN117358030B (en) * | 2023-11-21 | 2024-07-16 | 济源市万洋冶炼(集团)有限公司 | Purifying device for generating flue gas in secondary lead smelting |
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| CN2341701Y (en) * | 1998-11-12 | 1999-10-06 | 李凤臣 | Plasma complex purifier |
| CN201023023Y (en) * | 2007-03-16 | 2008-02-20 | 海米提 | Plasma smoke purifying device |
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