CN106000014B - Multi-functional superposition flue gas advanced purification system - Google Patents

Multi-functional superposition flue gas advanced purification system Download PDF

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CN106000014B
CN106000014B CN201610646801.4A CN201610646801A CN106000014B CN 106000014 B CN106000014 B CN 106000014B CN 201610646801 A CN201610646801 A CN 201610646801A CN 106000014 B CN106000014 B CN 106000014B
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flue gas
purification
purification device
superposition
functional
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CN106000014A (en
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顾志龙
顾晟华
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D36/00Filter circuits or combinations of filters with other separating devices
    • B01D36/04Combinations of filters with settling tanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/002Separation 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 condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/1406Multiple stage absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/1425Regeneration of liquid absorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/1456Removing acid components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/1456Removing acid components
    • B01D53/1481Removing sulfur dioxide or sulfur trioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • B01D53/1487Removing organic compounds

Abstract

The purpose of the present invention is to provide a kind of multi-functional superposition flue gas advanced purification systems, flue gas can be made to reach deep purifying, reduce the discharge of pollutant.The multi-functional superposition flue gas advanced purification system includes at least one module, the module includes at least one unit, the unit includes N number of purification device and smoke temperature reducer, dew capture device, N number of purification device successively divides into first pass purification device according to flow of flue gas direction, second time purification device, ..., N is all over purification device, N is more than or equal to 3, after flue gas is by the superposition purification of N number of purification device, cooled down again by the smoke temperature reducer, dew therein is captured by dew capture device again, wherein, flue gas carries out deep purifying to pollutant in each purification device.

Description

Multi-functional superposition flue gas advanced purification system
Technical field
The present invention relates to the flue gas purification systems of flue gas purification system more particularly to industrial furnace and thermal power plant.
Background technique
" AQI " in most of China area is higher than international 3-4 times of standard of atmosphere pollution, and wherein fire coal boiler fume discharges Pollutant occupy about 40%.
In January, 2016, China was proposed coal-fired boiler in power plant flue gas " minimum discharge standard ", and that promulgated than 2014 is special Discharge standard is strictly many.Standard is as follows:
Foundation is 20000mg/m with the PM original concentration in flue dust with upper limit value3It calculates, removal efficiency must reach 99.95% or more;With the SO in flue gas2Original concentration is 2000mg/m3It calculates, removal efficiency must reach 98.25% or more; With the NO in flue gasXOriginal concentration is 1000mg/m3It calculates, removal efficiency must reach 95% or more.
But flue gas purifying technique both domestic and external is " single function series connection purification process ", highest removal efficiency: flue dust at present For 98~99%, SO2For≤98%, NOXIt is≤90%, is unable to reach " minimum discharge " limit value.
The flue gas pollutant emission limit of China is from " the especially discharge " in July, 2014 to " the ultralow row in January, 2016 Put ", just rewrite standard within only short 18 months, however not excluded that do not cross how long its standard can also rewrite.
The removal efficiency analysis according to the above standard and accordingly reached, must carry out that " depth is net to the pollutant control of flue gas Change handles " can be only achieved minimum discharge " standard.
Summary of the invention
The purpose of the present invention is to provide a kind of multi-functional superposition flue gas advanced purification systems, flue gas can be made to reach depth Purification, reduces the discharge of pollutant.
The multi-functional superposition flue gas advanced purification system of one kind includes at least one module, and the module includes at least one list Member, the unit include N number of purification device and smoke temperature reducer, dew capture device, and N number of purification device is according to flue gas stream Dynamic direction successively divide into first pass purification device, second time purification device ..., N compile purification device, N be more than or equal to 3, After flue gas is by the superposition purification of N number of purification device, then cooled down by the smoke temperature reducer, then captured wherein by dew capture device Dew, wherein flue gas carries out multi-functional superposition deep purifying to pollutant in each purification device.
The further feature of the multi-functional superposition flue gas advanced purification system is, the pollutant include dust and SO2、NOX、VOCs, Hg, nocuousness H2O。
The further feature of the multi-functional superposition flue gas advanced purification system is that the first pass purification device includes The flat long undergauge clarifier of thin type, the flat long undergauge clarifier of thin type include section converging transition and connection section converging transition it is small The long undergauge section of flat thin type at end, the flat long undergauge segment length of thin type are greater than 5m and are configured with spray equipment, the flue gas being cleaned It is discharged from the outlet end of the flat long undergauge section of thin type.
The further feature of the multi-functional superposition flue gas advanced purification system is that second time purification device includes Coning purification device with the coning component in outer cylinder and outer cylinder, the coning component provide taper exhaust gases passes and taper The conveyor screw arranged in exhaust gases passes, and it is configured with spray equipment, so that flue gas sprays into multifunctional ceiling while entering coning body Liquid is received, the further speedup of flue gas and rotation are made, carries out multifunctional purifying.
The further feature of the multi-functional superposition flue gas advanced purification system is that third time purification device is that depth is net Change device, deep purifier includes the sieve plate group in outer cylinder and outer cylinder, and sieve plate group includes on the face perpendicular to flow of flue gas direction The left-hand sieve plate and dextrad sieve plate of interlaced arrangement, and the undergauge of each sieve plate is not more than 10%, and is configured with spray equipment, so that Flue gas enters also absorbing liquid spray cleaning simultaneously.
It includes cold that the further feature of the multi-functional superposition flue gas advanced purification system, which is the smoke temperature reducer, But the device of the cold air agent of the fluid cooling tube of flue gas or application cooled flue gas.
The further feature of the multi-functional superposition flue gas advanced purification system is multiple lists in each module Member is set side by side, and shares a gas inlet gate and an exhanst gas outlet gate.
The further feature of the multi-functional superposition flue gas advanced purification system is that multiple modules are set side by side, often One module has independent gas inlet gate and independent exhanst gas outlet gate.
The further feature of the multi-functional superposition flue gas advanced purification system is that N number of clarifier is to pass through spray Multifunctional absorption liquid carrys out the hydrofilter of purifying smoke, and the Multifunctional absorption liquid can be purified simultaneously and be absorbed containing SO2、NOX、 VOCs, Hg solution or turbid.
The further feature of the multi-functional superposition flue gas advanced purification system be the system further include lime-ash settling tank, Filtering pond and new liquid pool, the lime-ash settling tank for collect the lime-ash carried from the module by spray water droplet and Grain, the absorbing liquid of the lime-ash settling tank discharge not fully absorbed there are also part enter filtering pond and are precipitated, the filtering The portion filtrate in pond drains into new liquid pool, becomes new for being transported to the absorbing liquid that the system is purified for absorbent to be dissolved Liquid;Another part filtrate in the filtering pond directly passes through pump and is transported to the system.
Multi-functional superposition flue gas advanced purification system energy flue dust SO of the invention2、NOX、VOCsEqual organic volatiles, Hg etc. Heavy metal, first pass, second time, third in, the 4th time ... superposition flue gas purifying equipment and meanwhile carry out it is multi-functional repeatedly Purification.After multipass time multifunctional purifying technique, remaining pollutant more function together with the entrance finally of the flue gas of a large amount of water mists Before capable of decontaminating, removing wet purification and technique, flue gas is cooled down, allows flue gas to remove in purification system internal condensation, makes throat The white smoke of discharge is reduced.
There are many a block combiners to form for whole system, and each module has multiple units to be combined into a module, and maintenance is protected When supporting, each module or each unit Safe withdrawing and system from system are separated, so that flue gas deep purifying and can more be set When standby maintenance is repaired, the normal operation of boiler controller system is not interfered, guarantees the long-term operation ratio 100% of big system.
Detailed description of the invention
The above and other features of the present invention, property and advantage will pass through retouching with reference to the accompanying drawings and examples It states and becomes readily apparent from, in which:
Fig. 1 is the cleaning equipment section horizontal type of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention Superposition purification schematic diagram.
Fig. 2 is that the cleaning equipment section of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention is vertical Superposition purification schematic diagram.
Fig. 3 is a list of a module of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention The system structure combination floor plan schematic diagram of member.
Fig. 4 is the vertical cross-sectional view of Fig. 3.
Fig. 5 is 300MW (1000T/H) pot of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention The schematic diagram of furnace unit (by 10 block combiners).
Fig. 6 is a module (100T/H of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention Boiler) combination diagram.
Fig. 7 is the drop before the dew catcher of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention Warm schematic device.
Fig. 8 A is the structural schematic diagram of the long undergauge clarifier of flat thin type of one embodiment of the present of invention.
Fig. 8 B is the cross-sectional view of the line A-A along Fig. 8 A.
Fig. 9 is the structural schematic diagram of an illustrative coning purification device device.
Figure 10 A is an illustrative structural schematic diagram with the deep purifier for intersecting sieve plate.
Figure 10 B is the sectional view of each A-A section along Figure 10 A.
Figure 10 C is the sectional view of each B-B section along Figure 10 A.
Specific embodiment
The invention will be further described with attached drawing combined with specific embodiments below, elaborates in the following description more Details to facilitate a thorough understanding of the present invention, still the present invention obviously can be come with a variety of other ways different from this description it is real It applies, those skilled in the art can make similar popularization according to practical situations without violating the connotation of the present invention, drill It unravels silk, therefore should not be limited the scope of the invention with the content of this specific embodiment.
Multi-functional superposition flue gas advanced purification system is as shown in Figure 1, not purified flue gas 15 enters lateral stacking first All over purification device 11, the flue gas by first pass purification enters second time purification device 12, by second time purification device 12 Flue gas enters third all over purification device 13, and the flue gas by third all over purification device 13 enters the 4th time purification device 14 ... ..., If necessary, more purification devices can be set.The purifying rate of flue gas reaches high after the superposition purification of multipass time, can With the requirement of satisfaction " flue gas minimum discharge ".As shown in Figure 1, that flue gas cool-down can be arranged before last one of purification device Device 39.
The work flow diagram of multi-functional superposition flue gas advanced purification system as shown in Figure 2 is identical, only its flow of flue gas Mode is changed to the vertical upper and lower type of flow by transverse plane.
The system knot of a unit in the multi-functional superposition flue gas advanced purification system being further described as shown in Figure 3 Structure combination floor plan schematic diagram, import flue gas 15 enters " the flat long undergauge clarifier of thin type " 31, wherein by many nozzles pair Flue gas carries out first pass spray removing dirt, SO2、NOX、VOCs, the pollutants such as Hg, connector 37 is then passed in and out by first flue Into " coning purification device device " 32, flue gas is made to carry out second time superposition spray cleaning, is relayed in " coning purification device device " 32 Continue to relatively fine PM and SO2、NOX、VOCs, the pollutants such as Hg remove, be superimposed purified flue gas through second time spray and pass through the Two flue inlet and outlet connectors 38 enter, and there is " deep purifier " 33 for intersecting sieve plate to carry out third all over superposition purification, make cigarette More tiny PM1 dust below in gas, more rare SO2、NOX、VOCs, Hg is purged.It can also if necessary be further added by Superposition purification all over time, by above three times or for several times to gas cleaning after, the pollutant in flue gas remains little.If reached Higher purifying rate will carry out " fine purifying " to flue gas;If it is desired that smoke gas fine purification makes its purifying rate reach ultimate attainment, must also It must will include superfine mist and clouds and more rare SO2、NOX、VOCs, the pollutants such as Hg water mist remove, these water mists are by multipass Secondary superposition spray cleaning and generate, the moisture content (i.e. humidity) in flue gas is high and low related to flue-gas temperature, for example, one In secondary test, the water that (absolute humidity) includes at 60 DEG C is 130.1g/m3, and the water that 20 DEG C of whens include is 17.3g/m3, surpass It is saturated 112.8g/m3, and when 0 DEG C of atmospheric temperature, the water of saturation only has 4.8g/m3, over-saturation amount reach 125.3g/m3, this When partial moisture leaves throat, in case of temperature it is lower such as 0 DEG C when, a large amount of white vapor smog, dirt therein will be distributed The partial moisture is made it condense in flue gas purification system in advance and removed by dye object thus in company with arranging to atmosphere, just can be reduced big The concentration of AQI in gas.Thus enter smoke temperature reducer 39 after so that flue gas is left deep purifier 33.Flue gas cool-down is set to condense. Flue gas cool-down has several ways: first is that injecting coolant at this, another way is the fluid cooling tube that cooled flue gas is arranged (heat exchanger tube) is absorbed and utilized the heat in flue gas with fluid, not only plays energy-saving effect, but also flue gas cool-down is made to condense, smoke-purifying Gas effect.
Fig. 8 A is the structural schematic diagram of an illustrative flat long undergauge clarifier 31 of thin type, and Fig. 8 B is the line A-A along Fig. 8 A Cross-sectional view, the arrow in figure indicates flow of flue gas direction as the arrow in Fig. 9, Figure 10 B, Figure 10 C.The flat long undergauge of thin type Clarifier 31 includes section converging transition 310, the long undergauge section 311 of flat thin type and ash bucket 312, small end, the ash of section converging transition 310 The both ends of the big end and the long undergauge section 311 of flat thin type of bucket 312 are separately connected, the setting spray dress in the long undergauge section 311 of flat thin type 3100 are set, so that the solution Forced Mixing sprayed in the dust, dirt and spray equipment 3100 in flue gas.The flat long undergauge section of thin type 311 length is longer, and length is greater than 5m, and the flue gas being cleaned is discharged from the end of the long undergauge section 311 of flat thin type, can make in this way It is smaller to obtain the very fast resistance simultaneously of flue gas flow rate, such as velocity of flue gas, in 20m/s or so, flue gas resistance is arrived in 120Pa 150Pa, resistance very little, energy consumption are lower.
Fig. 9 is the structural schematic diagram of an illustrative coning purification device device 32 comprising in outer cylinder 320 and outer cylinder Cone-type spiral component 321, taper exhaust gases passes 3210 of cone-type spiral component 321 including butt and in taper exhaust gases passes The conveyor screw 3211 of setting, conveyor screw can be to be extended in the shape of a spiral with piece volume morphing.Outer cylinder 320nei is configured with spray equipment 3200, so that flue gas sprays into Multifunctional absorption liquid while entering cone-type spiral component 321, keep flue gas further progress multi-functional Purification.Cone-type spiral component 321 not only makes flue gas that can accelerate flow velocity, it can be allowed to rotate, force flue gas dirt and spray equipment 3200 solution sprayed are more fully mixed, and are equipped with ash bucket 322 in the bottom of outer cylinder 320.
Figure 10 A is the structural schematic diagram of an illustrative deep purifier 33, and Figure 10 B is that each A-A section cuts open in Figure 10 A Face figure, Figure 10 C are the sectional views of the B-B section along Figure 10 A.Deep purifier 33 includes frame 330 and sets in frame 330 The sieve plate group 331 set, sieve plate group 331 include multiple rows of sieve plate, and the water conservancy diversion direction of row's sieve plate 3310 is left-hand (on the direction A-A), Abbreviation left-hand sieve plate, the flue gas water conservancy diversion direction of adjacent row sieve plate 3311 are abbreviation dextrad sieve plate to the right (on the direction B-B) 3311.Left-hand sieve plate 3310 and dextrad sieve plate 3311 interlaced arrangement in the flow direction of the flue gas, the contracting of each sieve plate 3311,3310 Diameter less than 10%, flue gas left-hand sieve plate 3310, dextrad sieve plate 3311 outlet at cross disturb and mix strongly, resistance Power is little, but disturbs strongly, so that flue gas achievees the purpose that deep purifying.Sieve plate group 331 can arrange in multilayer manner, Spray equipment can be set between the layers.
It is an illustrative smoke temperature reducer 39 in Fig. 7, after flue gas passes into cooling equipment 39 by arrow direction 45 Low-temperature flue gas 46 be discharged.The fluid 313 of cooled flue gas is imported by the entrance 313 of cooling device water inlet manifold 311, into cooling After device heat exchanger tube 310 absorbs the heat in flue gas, exported after collecting via cooling device outfall sewer 312 by cooling fluid 314 discharges.Cooled low-temperature flue gas 46 is expelled to dew capture device 34, and the dew that absolute humidity is greater than in flue gas is captured Cleaner 16 discharge system of flue gas is entered into atmosphere afterwards.
In order to improve purifying rate, in domestic and international traditional technology the venturi of the concatenated flue gas purifying equipment of single function with it is porous Plate resistance is differed from 4000Pa to 20000Pa.
Due to multi-functional multipass time superposition purification, the drag overall of whole system requires to be designed very low, in order to reduce more function It can be superimposed the resistance of purification system, the present invention devises " the flat long undergauge clarifier of thin type " 31 and " coning clarifier " 32.
Equipment resistance of the invention is as shown in the table:
It is illustrated in figure 4 vertical cross-sectional view " A-A " section view of figure 3 above, flue gas 15 is entered flat thin in figure with conventional flow velocity After the long undergauge clarifier 31 of shape, since necking sectional area is reduced, cigarette speed increases to 10m/s-40m/s, up to several meters to tens of Under rice undergauge spray effect, dust and SO2、NOXDeng carry out first pass multifunctional purifying, then via the first and second purification device it Between channel 37 enter coning clarifier 32, carry out second time multi-functional superposition purification, flue gas passes through coning body in the purification device 321, make it accelerate rotation by dust, SO2、NOXEqual pollutants make second of superposition purification, and then flue gas enters deep purifier 33, what the present invention configured is the deep purifier 33 (clarifier for being also possible to other structures) of 331 structure of sieve plate to flue gas work Third time superposition deep purifying can also carry out the 4th time, the 5th time ... multi-functional superposition purification if necessary, most laggard Enter smoke temperature reducer 39, enter dew catcher 34 after making smoke condensation, dews a large amount of in flue gas can be intercepted and purified In system, the flue gas of discharge is made to reduce white smoke.
Multi-functional superposition purification process system 300MW (1000T/H) boiler controller system 10 of one embodiment as shown in Figure 5 501~510 groups of module are combined into a system schematic, and heavy line is flue gas 15 in figure, and each module flue gas is by gas inlet gate 519 control with exhanst gas outlet gate 520.A certain module can be exited safely in systems when needing repairing, without interfering it Its module operates normally in systems, and unit safety continuous operation rate can keep 100% throughout the year.
When the new liquid 515 of the absorbing liquid of pollutant inputs individual module by pump using liquid 516 with circulation fluid in flue gas, also by inhaling It receives the new liquid of liquid 515 and is controlled with circulation fluid using the valve 521 of liquid 516, adjustable flow or completely cut off and exit module System repairs, the Safe withdrawing of module or to be incorporated to system particularly significant.For example, Chinese environmental protection rules and regulations coal-burning power plant machine Group does not allow that by-pass flue is arranged, if flue gas purification system any position breaks down, it is necessary to stop unit operation and (stop Power generation), this will cause fatal harm and loss to any one power plant, and the present invention solves tradition in the method for block combiner The insurmountable problem of technology, and occupied area is also smaller than traditional purification techniques occupation area of equipment.
The present invention uses liquid absorption method, PM and SO in purifying smoke2、NOX、VOCs, the pollutants such as Hg when, flue gas 15 In above-mentioned a large amount of lime-ash and particle carried by spray water droplet, pass through pipe influx to lime-ash settling tank 512, lime-ash settling tank Chemical absorbing liquid (agent) 518 not fully absorbed partially also in 512 is still available, so precipitated by filtering pond 514, Portion filtrate removes new liquid pool 513, and absorbing liquid (agent) 518, which is dissolved, which becomes the new liquid 515 of absorbing liquid, removes system purification, and another part can It is recycled, which, which recycles liquid 516, can be supplemented by pumping input system when the molten water of the absorbing liquid of new liquid pool is inadequate Part supplement water 517.
As shown in fig. 6, the block diagram of a module for the multi-functional superposition flue gas advanced purification system of one embodiment. In the module by the long undergauge clarifier 31611 of flat thin type, coning multi-functional cleaner 32612, deep purifier 33613 ... Deng smoke temperature reducer 39614, one unit of composition of dew catcher 34615.By the long undergauge clarifier 31621 of flat thin type, cone Revolve multi-functional cleaner 32622, deep purifier 33623 ... etc., smoke temperature reducer 39624, dew catcher 34625 Form a unit.By the long undergauge clarifier 31631 of flat thin type, coning multi-functional cleaner 32632, deep purifier 33633 ... etc., smoke temperature reducer 39634, dew catcher 34635 form a unit.So combined by several units At a module, i.e., the unit number of one module can be three or more or it is less.
Shown in Fig. 7, the dew of the multi-functional superposition flue gas advanced purification system of one embodiment of the present of invention is captured Smoke temperature reducer 39614,39624,39634 in the module being arranged before device 34615,34625,34635, cooled flue gas in figure Fluid 313 is imported by cooling device water inlet manifold 311, after the heat in flue gas is absorbed into cooling device heat exchanger tube 310, via Cooling device outfall sewer 312 is discharged after collecting by cooling fluid outlet 314.
Flue gas enters dew catcher 34615,34625,34635 after above-mentioned cooling, will be in low temperature saturation state Supersaturation water point in flue gas includes that pollutant captures, and allows fume-dehydrating to purify, the flue gas of high purification is made to be discharged into atmosphere.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore, it is all without departing from The content of technical solution of the present invention, according to the technical essence of the invention any modification to the above embodiments, equivalent variations And modification, it each falls within the protection scope that the claims in the present invention are defined.

Claims (6)

1. multi-functional superposition flue gas advanced purification system, which is characterized in that including at least one module, the module includes at least One unit, the unit include N number of purification device and smoke temperature reducer, dew capture device, N number of purification device according to First pass purification device, second time purification device, N are successively divided into all over purification device in flow of flue gas direction, and N is more than or equal to 3, N number of purification device by spray Multifunctional absorption liquid come purifying smoke, after flue gas is by the superposition purification of N number of purification device, then Cooled down by the smoke temperature reducer, then dew therein is captured by dew capture device, wherein flue gas is in each purification dress Multi-functional superposition deep purifying is carried out to pollutant in setting, the first pass purification device includes the long undergauge clarifier of flat thin type, The long undergauge clarifier of flat thin type includes the long undergauge section of flat thin type of the small end of section converging transition and connection section converging transition, The long undergauge segment length of flat thin type is greater than 5m and is configured with spray equipment, and the flue gas being cleaned is from the flat long undergauge section of thin type Outlet end discharge, second time purification device includes the coning purification device with the coning component in outer cylinder and outer cylinder, The coning component provides the conveyor screw arranged in taper exhaust gases passes and taper exhaust gases passes, and is configured with spray equipment, So that flue gas sprays into Multifunctional absorption liquid while entering coning body, the Multifunctional absorption liquid can purify simultaneously and absorption contains SO2、NOX、VOCs, Hg solution or turbid, make the further speedup of flue gas and rotation, carry out multifunctional purifying, third all over purification dress Setting is deep purifier, and deep purifier includes the sieve plate group in outer cylinder and outer cylinder, and sieve plate group is included in perpendicular to flow of flue gas The left-hand sieve plate and dextrad sieve plate of interlaced arrangement on the face in direction, and the undergauge of each sieve plate is not more than 10%, and configured with spray Device, so that enter in flue gas also has absorbing liquid spray cleaning simultaneously.
2. multi-functional superposition flue gas advanced purification system as described in claim 1, which is characterized in that the pollutant includes ash Dirt and SO2、NOX、VOCs, Hg, harmful sewage.
3. multi-functional superposition flue gas advanced purification system as described in claim 1, which is characterized in that the smoke temperature reducer The device of the cold air agent of fluid cooling tube or application cooled flue gas including cooled flue gas.
4. multi-functional superposition flue gas advanced purification system as described in claim 1, which is characterized in that more in each module A unit is set side by side, and shares a gas inlet gate and an exhanst gas outlet gate.
5. multi-functional superposition flue gas advanced purification system as described in claim 1, which is characterized in that multiple modules are arranged side by side Setting, each module have independent gas inlet gate and independent exhanst gas outlet gate.
6. multi-functional superposition flue gas advanced purification system as described in claim 1, which is characterized in that the system further includes lime-ash Settling tank, filtering pond and new liquid pool, the lime-ash settling tank is for collecting the ash carried from the module by spray water droplet Slag and particle, the absorbing liquid of the lime-ash settling tank discharge not fully absorbed there are also part enter filtering pond and are precipitated, institute The portion filtrate for stating filtering pond drains into new liquid pool, for absorbent being dissolved the suction for becoming being purified for being transported to the system Receive the new liquid of liquid;Another part filtrate in the filtering pond directly passes through pump and is transported to the system.
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CN106422744B (en) * 2016-11-09 2023-03-14 暨南大学 Disposable operation smoke purifier
CN106669374A (en) * 2017-03-15 2017-05-17 云南驰宏锌锗股份有限公司 Treatment equipment for temperature-rise flue gas containing dust, oil and sulfur dioxide for zinc smelting and roasting furnace
CN109453586A (en) * 2018-12-28 2019-03-12 启明星宇节能科技股份有限公司 A kind of PM particulate matter capture device

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