CN105688558B - One kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system and its technique - Google Patents
One kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system and its technique Download PDFInfo
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- CN105688558B CN105688558B CN201610124945.3A CN201610124945A CN105688558B CN 105688558 B CN105688558 B CN 105688558B CN 201610124945 A CN201610124945 A CN 201610124945A CN 105688558 B CN105688558 B CN 105688558B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D47/12—Washers with plural different washing sections
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Abstract
Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system and its technique are realized the invention discloses one kind, water wash system includes：Absorber portion；Automatic cycle absorbs liquid pool；Specific panel group demister, specific panel group demister is engaged with absorber portion；Falling liquid film washing section, falling liquid film washing section is engaged with specific panel group demister, and washing process includes：(1) flue gas is contacted after entering absorber portion with absorbent；(2) automatic cycle, which absorbs liquid pool, to obtain new flue gas by most of larger drop of particle diameter in flue gas and flue dust removal, and then flue gas is re-entered on absorber portion；(3) absorber portion sends flue gas to specific panel group demister, and specific panel group demister removes more than 10 microns in flue gas of drop；(4) falling liquid film washing section continues to remove matter to flue gas.The present invention makes full use of existing desulfurizing tower headroom and site space, improves separative efficiency and precision, the particle content in wet desulphurization tail gas is reduced into minimum discharge level.
Description
Technical field
The present invention relates to the solid separation field of vapour-liquid, and in particular to one kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film
Water wash system and its technique.
Background technology
Current desulfurizer is typically designed droplet content 75mg/m in demister exiting flue gas3, it means that in neat stress
A part of deliquescent particulate matter is that wet desulphurization device is increased, is unavoidable, while during actual motion, absorbent is dense
Spend that flue gas flow rate is higher in high or absorption tower or demister effect is bad, can all cause to carry droplet content and be higher than
75mg/m3, now particle concentration is up to 20mg/m in flue gas3Even more high, this concentration has reached GB13223-
The 20mg/m of key area in 2011 standards3Smoke dust discharge concentration limit value, has approached general area in GB13223-2011 standards
30mg/m3Smoke dust discharge concentration limit value.It is 40~60mg/Nm to consider further that desulfurizer inlet flue gas dust content3, so
Flue gas is difficult to meet new environmental protection standard requirement after wet desulphurization.
At present, in wet desulphurization tail gas demisting dedusting application, mainly using wet cottrell, Flat defroster
With three kinds of ridge type demister.
Wet cottrell：Wet cottrell it is main by anode system (receiving electrode), cathod system (corona wire),
HVDC power supply is constituted, and the corona wire being erected in wet cottrell is applied using high voltage electrostatic device during work
Increase piezoelectricity, high-voltage electrostatic field is formd between yin, yang two-stage, in the presence of electric field force, all shape in whole precipitation pole pipe
Into corona zone.It is enough to make the electrostatic field of gas ionization when the flue gas of dust-laden, drop, aerosol, acid mist and other pollutants enters
When, produce substantial amounts of negative ions and electronics and make dirt, acid mist, drop etc. charged, it is charged after particle electric field force effect
It is lower to move and deposited on receiving electrode to receiving electrode, receiving electrode inside pipe wall formation dust-laden liquid film, dust-laden liquid film in deposition process
In the collecting tank for flowing to wet cottrell bottom under gravity, so as to reach that dirt, drop, gas are molten in trapping flue gas
The purpose of glue, acid mist and other pollutants.
Flat defroster：Demister modules use the demister arrangements of horizontal structure form.Flat defroster can pacify
Fill in absorption tower, flue gas is to flow vertically to, referred to as the board-like demister of horizontal or abbreviation Flat defroster；Flat defroster
Also it can be installed vertically on absorption tower outlet horizontal flue, referred to as rectilinear board-like demister or chimney flue type demister.Typically adopt
Supported with Two-layer Beam or fixed.
Ridge type demister：Demister modules use the demister arrangements of ridge structure form.It is divided into " people " word by profile
Type, rhombus and circle.The advantage of ridge-roof type demister is that flue gas is less than horizontal cross-section in tower by the flow velocity of blade normal
Mean flow rate, accordingly even when flue gas flow rate is higher in tower, when by demister, because circulation area increases and causes flue gas stream
Speed reduces.
Flat and ridge type demister all uses blade construction, and this structure demisting efficiency is low, and separation accuracy is low, solid
Grain is easily deposited on blade, easily there is dead angle in cleaning process, and mounting and dismounting are inconvenient difficult, and investment is big.While wet type
Electrostatic precipitator application conditions are harsher, and structure is more complicated, and electric quantity consumption is big, existing equipment is such as transformed, it is impossible to meet
Wet cottrell space requirement.
The content of the invention
For the problems of above-mentioned wet desulphurization tail gas demisting dedusting technology, it is a primary object of the present invention to provide
One kind can realize Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system；Simultaneously on the basis of the water wash system, also carry
Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film washing process is realized for one kind.
To reach above-mentioned purpose, technical scheme is as follows：
Scheme 1：One kind is provided and realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, the water wash system bag
Include：
Provided with the absorbent with smoke contacts in absorber portion, the absorber portion；
Automatic cycle absorbs liquid pool, and the automatic cycle absorbs liquid pool and is engaged with absorber portion；
Specific panel group demister, the specific panel group demister is engaged with absorber portion；
Falling liquid film washing section, the falling liquid film washing section is engaged with specific panel group demister.
In a preferred embodiment of this water wash system, the automatic cycle absorb liquid pool include aeration zone, aeration tube,
Dividing plate, overflow plate, inclined plate sedimentation area, deflector, zoneofoxidation, clear liquid area, mixed zone and demarcation strip.
In a preferred embodiment of this water wash system, the specific panel group demister includes the demisting set gradually
Device, one-level rinse water layer, one-level specific panel group demister, two grades rinse water layer, three-level and rinse water layer and two grades of specific panel groups and remove
Day with fog.
In a preferred embodiment of this water wash system, one-level rinses water layer, two grades of flushing water layers and three-level flushing water
Flush pipe is respectively equipped with layer.
In a preferred embodiment of this water wash system, the falling liquid film washing section includes wash water collector, loose fiber
Bed, elution water pipe, elution tank, water inlet, wastewater discharge pipe, water washing cycles pipe, fresh water filling pipe, water washing cycles pump and washing
Circulating slot.
In a preferred embodiment of this water wash system, the loose fiber bed includes the wet area of loose fiber, interior dermoskeleton
Frame, loose fiber do area, loose fiber and do area's supporting layer, upper cover plate and elution water hole.
Scheme 2 realizes that Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film washes work there is provided one kind based on above-mentioned water wash system
Skill, the technique comprises the following steps：
(1) flue gas is contacted after entering absorber portion with the absorbent in absorber portion, and after contact, flue gas can rise and fall with absorbent one
Enter to automatic cycle and absorb in liquid pool；
(2) automatic cycle, which absorbs liquid pool, to obtain new cigarette by most of larger drop of particle diameter in flue gas and flue dust removal
Flue gas, is then re-entered on absorber portion by gas；
(3) absorber portion sends flue gas to specific panel group demister, and specific panel group demister is by more than 10 microns in flue gas
Drop remove, and the flue gas after removal is sent to falling liquid film washing section；
(4) falling liquid film washing section continues to remove matter to flue gas, more than 1 micron drop in flue gas is removed, it is ensured that drop in flue gas
Content is less than 30mg/m3, and dust content is less than 5mg/m3.
In a preferred embodiment of this washing process, flue gas initially enters the aeration in automatic cycle absorption liquid pool
Area, the air liquid level that aeration zone is blasted by aeration tube is got a promotion, and zoneofoxidation, the absorbing liquid after oxidation are entered after overflow plate
Enter inclined plate sedimentation area in the presence of deflector, experimental solids particle quick separating, absorbing liquid clear liquid overflow enters clear liquid area,
After slurries are mixed into absorbing liquid mixed zone with fresh slurry, followed automatically into aeration zone with realizing after deflector and baffle plate
Ring, so that most of larger drop of particle diameter and flue dust in flue gas be removed.
In a preferred embodiment of this washing process, flue gas enters after special pipe demister, and water layer is rinsed for the first time
Follow special pipe demister closely, rinse direction along flue gas ascent direction, first order specific panel group demister is rinsed, the second level
Rinse water layer and follow the setting of first order specific panel group demister closely, rinsed against flue gas ascent direction, the third level rinses water layer and followed closely
The second level is rinsed water layer and set, and is rinsed along flue gas ascent direction, and second level specific panel group demister follows third level flushing water closely
Stratification, so that more than 10 microns in flue gas of drop be removed.
In a preferred embodiment of this washing process, the flue gas after specific panel group demister preliminary purification can lead to
Washing water collector is crossed into loose fiber Chuan Shi areas, washing water is under the drainage of fiber, in one layer of fiber surface formation
Moisture film, is trapped and increases the fine droplet in flue gas and fine particulates, more than 1 micron in tail gas of liquid is removed with this accordingly
Drop,
Ensure that droplet content is less than 30mg/m in exiting flue gas3, dust content is less than 5mg/m3；Washing water is followed in washing simultaneously
Stored in ring tank, washing water is followed by eluting water pipe, elution tank, loose fiber bed, elution water collector, water inlet, washing
Endless tube, water washing cycles pump and water washing cycles tank formation closed-loop path, waste water are discharged by wastewater discharge pipe, and fresh water passes through fresh
Water filling pipe is filled into, and the waste water of generation enters wastewater treatment or desulphurization system is used.
The falling liquid film washing scheme that the present invention is provided makes full use of existing desulfurizing tower headroom and site space, improves separation
Efficiency and precision, minimum discharge level is reduced to by the particle content in wet desulphurization tail gas, effectively solves prior art institute
The problem of existing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is system flow chart of the invention；
Fig. 2 is the structural representation that automatic cycle absorbs liquid pool；
Fig. 3 is Fig. 2 view in transverse section；
Fig. 4 is Fig. 2 longitdinal cross-section diagram；
Fig. 5 is the structural representation of loose fiber bed.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to Fig. 1, what the present invention was provided realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, and it includes inhaling
Receive section 1, automatic cycle and absorb liquid pool 2, specific panel group demister and falling liquid film washing section.
Absorber portion 1, it is internally provided with the absorbent with smoke contacts, after flue gas is entered in absorber portion 1, can be with absorption
Agent is contacted, and is dropped into together with flue gas in automatic cycle absorption liquid pool 2.
Automatic cycle absorbs liquid pool 2, and its absorber portion 1 is engaged, and it is used for the larger drop of most of particle diameter in flue gas
And flue dust is removed.
Referring to Fig. 2 to Fig. 4, automatic cycle absorb liquid pool 2 include aeration zone 01, aeration tube 02, dividing plate 03, overflow plate 04,
Inclined plate sedimentation area 05, deflector 06, zoneofoxidation 07, clear liquid area 08, mixed zone 09 and demarcation strip 010.
Former flue gas realizes that vapour-liquid is contacted after absorber portion 1 with absorbent, and absorbent falls into cyclic absorption liquid pool 2, and circulation is inhaled
The air liquid level that receipts liquid is blasted in aeration zone 01 by aeration tube 02 is got a promotion, and zoneofoxidation 07, oxygen are entered after overflow plate 04
Absorbing liquid after change enters inclined plate sedimentation area 05 in the presence of deflector 06, and experimental solids particle quick separating, absorbing liquid is clear
Hydrorrhea stream enters clear liquid area 08, after slurries are mixed into absorbing liquid mixed zone 09 with fresh slurry, through deflector 06 and baffle plate 03
Enter aeration zone 01 afterwards to realize that the materials such as drop and dirt can be carried in self-loopa, flue gas to be risen to after special pipe demister 3, its
The larger drop of middle most of particle diameter and particulate matter are captured.
Aeration tube is laid on aeration zone bottom, and absorbing liquid enters behind aeration zone, because of gas lift effect liquid level lifting, through overflowing
Flow and enter zoneofoxidation after plate, liquid oxidation will be absorbed by blasting large quantity of air in zoneofoxidation, and the absorbing liquid after simultaneous oxidation is in deflector
Under effect, into inclined plate sedimentation area, make the solid particle and absorbing liquid quick separating formed after oxidation, form lower floor's concentration higher
Absorbing liquid, the concentration gradient of the relatively low absorbing liquid of upper strata concentration, from inclined plate sedimentation area discharge high-concentration absorbent liquid, low concentration inhale
Receive liquid to enter clear liquid area and enter desulfurizing tower absorber portion, after high-concentration absorbent liquid is mixed with fresh absorbing liquid in mixed zone, again
Into circulation.
Circulating absorption solution realizes self-loopa by the oxidation air blasted, and oxidation air is inhaled by the lifting circulation of aeration tube 02
Liquid formation liquid level difference is received, while making the oxidation of absorbing liquid in aeration zone 01 and zoneofoxidation evenly, in cyclic absorption liquid pool
Concentration and pH value are more easy to stabilization.
Referring to Fig. 1, specific panel group demister, it is engaged with absorber portion 1, and it is for by more than 10 microns in flue gas
Drop is removed.
Specific panel group demister includes special pipe demister 3, one-level and rinses water layer 4, wash tub pipe 5, one-level specific panel group
Demister 6, two grades of flushing water layers 7, three-levels rinse water layer 8 and two grades of specific panel group demisters 9.
Special pipe demister 3 is set immediately following desulfurizing tower absorber portion, and one-level specific panel group demister 6 rinses water layer immediately following one-level
4 are set, and two grades of specific panel group demisters 9 rinse water layer 8 immediately following three-level and set, and special pipe has self-cleaning function, specific panel group
Using High efficiency baffle plate.Flow velocity of the flue gas in demister is 2~5m/s.
Special pipe demister 3 mainly removes the drop and particulate matter of big particle diameter in the flue gas through desulfurization section, and reduction downstream is special
Different plate group demister load.
Specific panel group demister 3 uses High efficiency baffle plate, more than 10 microns drops of processing and particulate matter.
One-level rinses water layer 4, two grades of flushing water layers 7 and three-level flushing water layer 8 and is connected to wash tub pipe 5.
One-level, which rinses water layer 4, to be used to be rinsed the bottom of one-level specific panel group demister 6, and two grades are rinsed water layer 7 and are used for
The top of one-level specific panel group demister 6 is rinsed, three-level, which rinses water layer 8, to be used to carry out two grades of specific panel group demisters 9
Rinse, to ensure the performance of demister.
The specific panel group demister constituted accordingly can effectively remove more than 10 microns in flue gas of drop, and its process is such as
Under：
The materials such as drop and dirt can be carried in flue gas to rise to after special pipe demister 3, wherein most particle diameter is larger
Drop and particulate matter are captured, and special pipe has self-cleaning ability, and water layer is rinsed without setting, and flue gas passes through one-level specific panel again
Group demister 6 and two grades of specific panel group demisters 9, wherein more than 10 microns of drop is removed, drop droplet content in flue gas
As little as 50mg/m3, dust content is reduced to 10mg/m3。
Referring to Fig. 1 and Fig. 5, falling liquid film washing section is engaged with specific panel group demister, its be used for by 1 micron in flue gas with
Upper drop is removed, it is ensured that droplet content is less than 30mg/m3 in flue gas, and dust content is less than 5mg/m3.
Falling liquid film washing section includes elution water collector 10, loose fiber bed 11, elution water pipe 12, elution tank 13, water inlet
Mouth 14, wastewater discharge pipe 15, water washing cycles pipe 16, fresh water filling pipe 17, water washing cycles pump 18 and water washing cycles groove 19.
Elution water collector 10 follows two grades of specific panel group demisters 9 closely and set, and it, which is acted on, collects washing water.Using ramp type
Structure.
Loose fiber bed 11 follows elution water collector 10 closely and set, and is the main portion that falling liquid film washing section realizes vapour-liquid contact
Point, fine droplet and fine particulates collide and rebounded with fiber surface, because loose fiber bed accessory has big specific surface area,
The collision probability of fine droplet and fine particulates in flue gas can be increased, while in the contact probability increase with washing water, flue gas
Dirt and aerosol can increase by loose fiber bed 11 trap.
Loose fiber bed uses modular construction, 0.5~2.5m/s of fiber bed surface gas velocity.Washing section liquid-gas ratio is not less than
0.05L/m3。
Loose fiber bed 11 specifically includes the wet area 001 of loose fiber, inside and outside skeleton 002, and loose fiber does area 003, loose
Fiber does area's supporting layer 004, upper cover plate 005 and elution water hole 006.
Fibre bed upper cover plate 005 is provided with elution tank 13, and sink top is provided with water inlet 14, with eluting water pipe on desulfurizing tower
12 are connected, and upper cover plate 005 is provided with flushing water hole 006, percent opening 10~50%, water hole 3~15mm of diameter.
Water washing cycles tank 19 is elution water storage tank, and in water-washing process, the PH of water is constantly reduced, and water washing tank should use corrosion resistant
Material is lost, Leak-tight liner material (line with rubber, lining PO etc.), or all-plastic material can be used.Water washing cycles tank volume ensures in water washing cycles
5~15min residence time under the flow of pump 18.
Water washing cycles pump 18 need to use corrosion-resistant material, depending on flow is according to elution circuit liquid-gas ratio, and lift need to ensure to drench
Wash system 2~3barg pressure.
Washing water is stored in water washing cycles tank 19, washing water by elute water pipe 12, elution tank 13, water inlet 14,
Loose fiber bed 11, elution water collector 10, water washing cycles pipe 16, water washing cycles pump 18 and the formation of water washing cycles groove 19 are closed back
Road, waste water is discharged by wastewater discharge pipe 13, and fresh water is filled into by fresh water filling pipe 17, and the waste water of generation enters at waste water
Reason or desulphurization system are used.
The falling liquid film washing section constituted accordingly, it is engaged with specific panel group demister, can effectively remove in flue gas 1 micron
Above drop, detailed process is as follows：
The scrubbed water collector of flue gas enter loose fiber Chuan Shi areas 001, washing water under the drainage of fiber,
Fiber surface formation water membrane, loose fiber bed 11 has big specific surface area, considerably increases vapour-liquid contact area, flue gas
In fine droplet and fine particulates be easier to be captured and increase, the drop and fine particulates after increase pass through falling liquid film water
Wash after section, into loose fiber Chuan Gan areas 003, drop and fine particulates are easier to be collided by superhydrophobic fibers and anti-
The drop of other in bullet, with flue gas and the increase of fine particulates collision rift, after the coalescence effect of loose fiber bed 11, in tail gas
More than 1 micron drop removal efficiency is up to more than 95%, it is ensured that droplet content is less than 30mg/m in exiting flue gas3, dust content is small
In 5mg/m3。
The falling liquid film water wash system constituted based on such scheme, can be achieved Desulphurization for Coal-fired Power Plant tail gas minimum discharge, specifically
Process is following (referring to Fig. 1 to Fig. 5)：
Former flue gas realizes that vapour-liquid is contacted after absorber portion 1 with absorbent, and absorbent falls into cyclic absorption liquid pool 2, and circulation is inhaled
The air liquid level that receipts liquid is blasted in aeration zone 01 by aeration tube 02 is got a promotion, and zoneofoxidation 07, oxygen are entered after overflow plate 04
Absorbing liquid after change enters inclined plate sedimentation area 05 in the presence of deflector 06, and experimental solids particle quick separating, absorbing liquid is clear
Hydrorrhea stream enters clear liquid area 08, after slurries are mixed into absorbing liquid mixed zone 09 with fresh slurry, through deflector 06 and baffle plate 03
Enter aeration zone 01 afterwards to realize self-loopa；
The materials such as drop and dirt can be carried in flue gas to rise to after special pipe demister 3, wherein most particle diameter is larger
Drop and particulate matter are captured, and special pipe has self-cleaning ability, and water layer is rinsed without setting, and flue gas passes through one-level specific panel again
Group demister 6 and two grades of specific panel group demisters 9, wherein more than 10 microns of drop is removed, drop droplet content in flue gas
As little as 50mg/m3, dust content is reduced to 10mg/m3；
After the scrubbed water collector 10 of flue gas after primary purifying, into loose fiber Chuan Shi areas 001, washing water is in fibre
Under the drainage of dimension, in fiber surface formation water membrane, loose fiber bed 11 has big specific surface area, considerably increased
Fine droplet and fine particulates in vapour-liquid contact area, flue gas are easier to be captured and increased, drop after increase and thin
Microparticle thing is passed through after falling liquid film washing section, into loose fiber Chuan Gan areas 003, and drop and fine particulates are easily super-hydrophobic
Fiber collides and rebounded, and increases with the drop of other in flue gas and fine particulates collision rift, by loose fiber bed 11
After coalescence effect, more than 1 micron drop removal efficiency is up to more than 95% in tail gas, it is ensured that droplet content is less than in exiting flue gas
30mg/m3, dust content is less than 5mg/m3。
Here is that the concrete application of the present invention is implemented：
Implement 1
For the ammonia process desulfuration tower of power plant for self-supply's 2X140t/h coal-burning boilers, exhaust gas volumn 394252Nm3/ h, equipment importation liquid
Drip 150~200mg/m of content3, dust content 20mg/m3, desulfurizing agent is made using liquefied ammonia.
Former flue gas realizes that vapour-liquid is contacted after absorber portion 1 with absorbent, and absorbent falls into cyclic absorption liquid pool 2, and circulation is inhaled
The air liquid level that receipts liquid is blasted in aeration zone 01 by aeration tube 02 is got a promotion, and zoneofoxidation 07, oxygen are entered after overflow plate 04
Absorbing liquid after change enters inclined plate sedimentation area 05 in the presence of deflector 06, and experimental solids particle quick separating, absorbing liquid is clear
Hydrorrhea stream enters clear liquid area 08, after slurries are mixed into absorbing liquid mixed zone 09 with fresh slurry, through deflector 06 and baffle plate 03
Enter aeration zone 01 afterwards to realize that the materials such as drop and dirt can be carried in self-loopa, flue gas to be risen to after special pipe demister 3, its
The larger drop of middle most of particle diameter and particulate matter are captured, and special pipe has self-cleaning ability, and water layer, cigarette are rinsed without setting
Gas passes through one-level specific panel group demister 6 and two grades of specific panel group demisters 9 again, wherein more than 10 microns of drop is removed,
Droplet content in flue gas is set to be reduced to 50mg/m3, dust content is reduced to 10mg/m3, the scrubbed water of flue gas after primary purifying receives
After storage 10, into loose fiber Chuan Shi areas 001, washing water is under the drainage of fiber, in fiber surface one layer of water of formation
Film, loose fiber bed 11 has big specific surface area, considerably increases fine droplet in vapour-liquid contact area, flue gas and trickle
Particulate matter is easier to be captured and increased, and the drop and fine particulates after increase are passed through after falling liquid film washing section, into loose fibre
Wei Chuangan areas 003, drop and fine particulates are easier to be collided and rebounded by superhydrophobic fibers, with the drop of other in flue gas
And the increase of fine particulates collision rift, after the coalescence effect of loose fiber bed 11, more than 1 micron drop removes effect in tail gas
Rate is up to more than 95%, it is ensured that droplet content is less than 30mg/m in exiting flue gas3, dust content is less than 5mg/m3。
To ensure that specific panel group demister dirt will not deposit fouling, one-level is set to rinse water layer 4, two grades of flushing water layer 7 and
Three-level rinse water layer 8, flushing water at regular time and quantity by wash tub pipe 5, demister is rinsed.
Washing water is stored in water washing cycles tank 19, washing water by elute water pipe 12, elution tank 13, water inlet 14,
Loose fiber bed 11, elution water collector 10, water washing cycles pipe 16, water washing cycles pump 18, water washing cycles groove 19, formation are closed back
Road, waste water is discharged by wastewater discharge pipe 13, and fresh water is filled into by fresh water filling pipe 17, and the waste water of generation enters at waste water
Reason or desulphurization system are used.
Specific panel group demister and falling liquid film washing section are arranged on desulfurization column overhead, and specific panel group demister is arranged on desulfurizing tower
On absorber portion, falling liquid film washing section is arranged on specific panel group demister, undertakes respective function.
Device principal character：
1) self-loopa absorbs liquid pool 2
Self-loopa, which absorbs, absorbs flow velocity 3m/s in liquid pool.
2) special pipe demister 3, one-level specific panel group demister 6, two grades of specific panel group demisters 9
Special pipe demister 3 is set immediately following desulfurizing tower absorber portion, and one-level specific panel group demister 6 rinses water layer immediately following one-level
4 are set, and two grades of specific panel group demisters 9 rinse water layer 8 immediately following three-level and set, and special pipe has self-cleaning function, specific panel group
Using High efficiency baffle plate, 3 layers of deflection plate of every grade of use, material is using enhancing PP.Flow velocity of the flue gas in demister is 3.5m/s.
3) water collector 10 is eluted
Elution water collector 10 follows two grades of specific panel group demisters 9 closely and set, and it, which is acted on, collects washing water.Using ramp type
Structure, diameter 8.8m, swash plate spacing 50mm.
4) loose fiber bed 11
Fibre bed external diameter 700mm, length 1000mm, fibre bed upper cover plate elution water hole percent opening 50%, bore dia 6mm,
Liquid-gas ratio 0.3L/m3。
5) water washing cycles tank 19
Water washing cycles tank 19 uses PP materials.Tank volume 30m3。
6) water washing cycles pump 18
Water washing cycles pump 18 uses Q345R line with rubber materials, flow 120m3/ h, lift 60m.
Operational factor and result：
Each layer flushing water is rinsed once per hour, every layer of points of 4 pieces flushing region, and instantaneous washing water quantity is from first layer to the 3rd
Layer is respectively 45m3/h、30m3/h、23m3/ h, gives system water supplement 6.5m3/h。
Effect：Droplet content 30mg/m in neat stress3, dust content 4mg/m3。
Implement 2
For the calcium method desulfurizing tower of power plant for self-supply's 2X140t/h coal-burning boilers, exhaust gas volumn 450000Nm3/h, equipment importation liquid
Drip 150~200mg/m of content3, dust content 30mg/m3, desulfurizing agent is made using lime white.
Specific panel group demister and falling liquid film washing section are arranged on desulfurization column overhead,
Former flue gas realizes that vapour-liquid is contacted after absorber portion 1 with absorbent, and absorbent is fallen into cyclic absorption liquid pool 2, flue gas
The materials such as drop and dirt can be carried to rise to after special pipe demister 3, the larger drop of wherein most particle diameter and particulate matter quilt
Trapping, special pipe has self-cleaning ability, and water layer is rinsed without setting, and flue gas passes through one-level specific panel group demister 6 and two again
Level specific panel group demister 9, wherein more than 10 microns of drop is removed, makes droplet content in flue gas be reduced to 50mg/m3, dirt
Content is reduced to 10mg/m3, after the scrubbed water collector 10 of flue gas after primary purifying, into loose fiber Chuan Shi areas 001,
Washing water is under the drainage of fiber, in fiber surface formation water membrane, and loose fiber bed 11 has big specific surface area,
The fine droplet and fine particulates considerably increased in vapour-liquid contact area, flue gas is easier to be captured and increased, after increase
Drop and fine particulates pass through falling liquid film washing section after, into loose fiber Chuan Gan areas 003, drop and fine particulates more hold
Easily collided and rebounded by superhydrophobic fibers, increase with the drop of other in flue gas and fine particulates collision rift, by loose
After the coalescence effect of fibre bed 11, more than 1 micron drop removal efficiency is up to more than 95% in tail gas, it is ensured that liquid in exiting flue gas
Drip content and be less than 30mg/m3, dust content is less than 5mg/m3。
To ensure that specific panel group demister dirt will not deposit fouling, one-level is set to rinse water layer 4, two grades of flushing water layer 7 and
Three-level rinse water layer 8, flushing water at regular time and quantity by wash tub pipe 5, demister is rinsed.
Washing water is stored in water washing cycles tank 19, washing water by elute water pipe 12, elution tank 13, water inlet 14,
Loose fiber bed 11, elution water collector 10, water washing cycles pipe 16, water washing cycles pump 18, water washing cycles groove 19, formation are closed back
Road, waste water is discharged by wastewater discharge pipe 13, and fresh water is filled into by fresh water filling pipe 17, and the waste water of generation enters at waste water
Reason or desulphurization system are used.
Device principal character：
1) self-loopa absorbs liquid pool 2
Self-loopa, which absorbs, absorbs flow velocity 4m/s in liquid pool.
2) special pipe demister 3, one-level specific panel group demister 6, two grades of specific panel group demisters 9
Special pipe demister 3 is set immediately following desulfurizing tower absorber portion, and one-level specific panel group demister 6 rinses water layer immediately following one-level
4 are set, and two grades of specific panel group demisters 9 rinse water layer 8 immediately following three-level and set, and special pipe has self-cleaning function, specific panel group
Using High efficiency baffle plate, 1 layer of deflection plate of every grade of use, material is using enhancing PP.Flow velocity of the flue gas in demister is 3m/s.
3) water collector 10 is eluted
Elution water collector 10 follows two grades of specific panel group demisters 9 closely and set, and it, which is acted on, collects washing water.Using ramp type
Structure, diameter 10m, swash plate spacing 60mm.
4) loose fiber bed 11
Fibre bed external diameter 700mm, length 1000mm, fibre bed upper cover plate elution water hole percent opening 50%, bore dia 8mm,
Liquid-gas ratio 0.35L/m3.
5) water washing cycles tank 19
Water washing cycles tank 19 uses PP materials.Tank volume 32m3.
6) water washing cycles pump 18
Water washing cycles pump 18 uses Q345R line with rubber materials, flow 160m3/h, lift 60m.
Operational factor and result：
Each layer flushing water is rinsed once per hour, every layer of points of 4 pieces flushing region, and instantaneous washing water quantity is from first layer to the 3rd
Layer is respectively 71m3/h, 47m3/h, 47m3/h, gives system water supplement 11m3/h.
Effect：Droplet content 30mg/m3 in neat stress, dust content 3.5mg/m3.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (6)
1. one kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, it is characterised in that the water wash system bag
Include：
Provided with the absorbent with smoke contacts in absorber portion, the absorber portion；
Automatic cycle absorbs liquid pool, and the automatic cycle absorbs liquid pool and is engaged with absorber portion；
Specific panel group demister, the specific panel group demister is engaged with absorber portion；
Falling liquid film washing section, the falling liquid film washing section is engaged with specific panel group demister, and the falling liquid film washing section includes washing water
Collector, loose fiber bed, elution water pipe, elution tank, water inlet, wastewater discharge pipe, water washing cycles pipe, fresh water filling pipe,
Water washing cycles pump and water washing cycles groove, elution water collector follow the setting of specific panel group demister closely, and loose fiber bed follows elution closely
Water collector is set, and washing water store in water washing cycles tank, washing water by elute water pipe, elute tank, it is water inlet, loose
Fibre bed, elution water collector, water washing cycles pipe, water washing cycles pump and water washing cycles groove formation closed-loop path, waste water passes through useless
Water discharge pipe is discharged, and fresh water is filled into by fresh water filling pipe.
2. one kind according to claim 1 realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, its feature
It is, the automatic cycle, which absorbs liquid pool, includes aeration zone, aeration tube, dividing plate, overflow plate, inclined plate sedimentation area, deflector, oxidation
Area, clear liquid area, mixed zone and demarcation strip.
3. one kind according to claim 1 realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, its feature
It is, the special pipe demister, one-level flushing water layer, one-level specific panel group that the specific panel group demister includes setting gradually are removed
Day with fog, two grades of flushing water layers, three-levels rinse water layer and two grades of specific panel group demisters.
4. kind according to claim 3 realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, its feature exists
In one-level is rinsed on water layer, two grades of flushing water layers and three-level flushing water layer and is respectively equipped with flush pipe.
5. one kind according to claim 1 realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system, its feature
Be, loose fiber bed include the wet area of loose fiber, inside and outside skeleton, loose fiber do area, loose fiber do area's supporting layer,
Upper cover plate and elution water hole, upper cover plate is provided with elution tank, and pouring sink top, which is provided with water inlet, with desulfurizing tower, elutes water pipe phase
Even, upper cover plate is provided with elution water hole.
6. one kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film washing process, it is characterised in that the technique is included such as
Lower step：
(1) flue gas initially enters the aeration zone in automatic cycle absorption liquid pool, the air liquid level that aeration zone is blasted by aeration tube
Get a promotion, zoneofoxidation is entered after overflow plate, the absorbing liquid after oxidation enters inclined plate sedimentation area in the presence of deflector, real
Solid particle quick separating is tested, absorbing liquid clear liquid overflow enters clear liquid area, and slurries enter absorbing liquid mixed zone to be mixed with fresh slurry
After conjunction, aeration zone is entered after deflector and baffle plate to realize automatic cycle, so that by most of larger drop of particle diameter in flue gas
And flue dust is removed；
(2) flue gas enters after special pipe demister, and water layer is rinsed for the first time and follows special pipe demister closely, rinses direction along along flue gas
Direction is risen, first order specific panel group demister is rinsed, the second level rinses water layer and follows first order specific panel group demister closely
Set, rinsed against flue gas ascent direction, the third level rinses water layer and follows second level flushing water layer setting closely, along flue gas rising side
To flushing, second level specific panel group demister follows third level flushing water stratification closely, so that by more than 10 microns in flue gas of drop
Remove；
(3) flue gas after specific panel group demister preliminary purification can be wet into loose fiber bed by eluting water collector
Area, washing water, in fiber surface formation water membrane, traps under the drainage of fiber and increases small in flue gas accordingly
Drop and fine particulates, more than 1 micron in tail gas of drop are removed with this, it is ensured that droplet content is less than in exiting flue gas
30mg/m3, dust content is less than 5mg/m3；Washing water is stored in water washing cycles tank simultaneously, and washing water is by eluting water pipe, elution
Tank, loose fiber bed, elution water collector, water inlet, water washing cycles pipe, water washing cycles pump and water washing cycles tank formation closure
Loop, waste water is discharged by wastewater discharge pipe, and fresh water is filled into by fresh water filling pipe, and the waste water of generation enters wastewater treatment
Or desulphurization system is used.
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| CN201610124945.3A CN105688558B (en) | 2016-03-04 | 2016-03-04 | One kind realizes Desulphurization for Coal-fired Power Plant tail gas minimum discharge falling liquid film water wash system and its technique |
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| CN106693548A (en) * | 2017-01-20 | 2017-05-24 | 上海安赐环保科技股份有限公司 | Demisting and dedusting system and technique applied to urea granulation end gas |
| CN107081060A (en) * | 2017-05-31 | 2017-08-22 | 上海安赐环保科技股份有限公司 | One kind is applied to demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization |
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| US6964699B1 (en) * | 2002-06-05 | 2005-11-15 | The United States Of America As Represented By The Secretary Of The Navy | Rocket motor exhaust scrubber |
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| US4308039A (en) * | 1975-11-04 | 1981-12-29 | Rhone-Poulenc Industries | Method and apparatus for the treatment of gases containing soluble compounds |
| US6964699B1 (en) * | 2002-06-05 | 2005-11-15 | The United States Of America As Represented By The Secretary Of The Navy | Rocket motor exhaust scrubber |
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