CN106000013A - Wet desulfurization flue gas ultra-clean emission treatment system - Google Patents
Wet desulfurization flue gas ultra-clean emission treatment system Download PDFInfo
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- CN106000013A CN106000013A CN201610626168.2A CN201610626168A CN106000013A CN 106000013 A CN106000013 A CN 106000013A CN 201610626168 A CN201610626168 A CN 201610626168A CN 106000013 A CN106000013 A CN 106000013A
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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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
-
- 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
- B01D53/14—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 absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
Abstract
The invention provides a wet desulfurization flue gas ultra-clean emission treatment system. The treatment system comprises: supercharging atomizing equipment, which is used for humidifying desulfurization flue gas to obtain humidified flue gas; purification equipment, which is connected to the supercharging atomizing equipment, and is used for purification of the humidified flue gas to realize gas-liquid-solid separation, thus obtaining clean flue gas and flue dust containing liquid water; and circulating water filtration equipment, which is connected to the purification equipment to filter flue dust containing liquid water so as to obtain filtered liquid water, which can be recycled by the supercharging atomizing equipment. While realizing flue gas purification, the wet desulfurization flue gas ultra-clean emission treatment system provided by the invention recycles moisture in the flue gas, has powerful water saving function, basically can achieve zero water replenishment, and saves cost.
Description
Technical field
The present invention relates to smoke gas treatment field, particularly to a kind of wet desulfurization flue gas ultra-clean emission treatment system
System, is particularly suited for wet process of FGD field.
Background technology
Along with country's attention to environmental protection, the concern of environmental protection is improved, for the discharge of smoke gas treatment by the common people
Standard is also to improve again and again, rises on July 1st, 2014, the new standard of thermal power plant's Air Pollutant Emission
Come into effect, it is proposed that the concept of ultra-clean discharge；The industries such as on January 1st, 2015 rises, metallurgical are up-to-date
Standard limit of smog release formally implement.
The at present the most supporting environmental protection facilities such as wet desulphurization of major part enterprise, but generally there is problems in that
1, flue gas is saturated wet flue gas, takes a large amount of aqueous vapor out of, causes the waste of water resource；
2, subparticle cannot be removed, and causes dust emission cannot meet minimum discharge requirement；
3, containing SO in flue gas2、SO3, in the case of at dust exceeding, particularly fine dust exceeds standard,
Form aerosol, cause plume to delay long, cause " landscape pollution "
In order to solve the problems referred to above, reaching the requirement of ultra-clean discharge, existing solution is:
Wet type electricity is set up in the transformation of cleaner reform desulphurization denitration transformation and upgrade machinery demister
Dedusting
There is investment cost height in above-mentioned existing solution, operating cost is high, the transformation cycle is long, transformation difficulty
The problems such as degree is big, therefore develop a kind of new technique flue gas being carried out ultra-clean process at end extremely urgent.
Summary of the invention
It is an object of the invention to provide a kind of ultra-clean discharge treating system of wet desulfurization flue gas, it is possible to realize
While gas cleaning, the steam in flue gas is recycled.
To achieve these goals, the present invention provides following technical scheme:
A kind of ultra-clean discharge treating system of wet desulfurization flue gas, described processing system includes: pressurised atomised set
Standby, for desulfurization fume is humidified, obtain the flue gas through humidification；Cleaning equipment, described purification
Equipment is connected with described pressurised atomised equipment, for purifying the flue gas of described humidification realize gas-liquid
Solid separation, obtain clean flue gas and the aqueous water comprising flue dust；With recirculated water filter plant, described in follow
Ring water filtration device is connected with described cleaning equipment, for the aqueous water comprising flue dust is filtered,
Aqueous water after filtration, the aqueous water after described filtration supplies described pressurised atomised equipment and recycles.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described pressurised atomised set
For including booster pump, pipeline and atomizer, described booster pump passes through described pipeline and described atomizer
Connection.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described cleaning equipment is
Flue gas degree of depth dedusting removes mist water saving fixtures.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, the described flue gas degree of depth is removed
Dirt is made up of except mist water saving unit several dedustings except mist water saving fixtures, and several described dedustings are economized on water except mist
Unit is arranged in parallel at desulfurizing tower by attachment means after being connected in or inside flue.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described dedusting saves except mist
Water unit is made up of coalescence polymeric segment and centrifuge dehydration section, and the flue gas of described humidification initially enters described coalescence
Condense in polymeric segment, then enter back into described centrifuge dehydration section in realize the separation of gas-liquid-solid.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described recirculated water filters
Equipment includes collecting water tank, filter pump, filter, water tank with strainer and pipeline, wherein: described collection water
Case is connected with described cleaning equipment by pipeline, for collecting the aqueous water comprising flue dust；Described filter pump
Being connected with described collection water tank by pipeline, described filter is connected with described filter pump by pipeline, institute
State in the aqueous water in described collection water tank is squeezed into described filter by filter pump and filter, filtered
After water and underflow；Described water tank with strainer is connected with described filter by pipeline, the water after described filtration
Enter water tank with strainer and carry out physical sedimentation, the water after being precipitated.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described recirculated water filters
Equipment also includes water circulating pump, and the water after precipitation in described water tank with strainer is squeezed into described by described water circulating pump
Pressurised atomised equipment reuse.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, it is used for connecting described mistake
It is provided with filtering traffic meter on the pipeline of filter and described water tank with strainer, is used for connecting described filter pump and institute
State and on the pipeline of filter, be provided with filtration water pressure transmitter.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, described recirculated water filters
Equipment also includes that desulfurization melt pit, described desulfurization melt pit connect described filter by pipeline, is used for collecting institute
State the underflow obtained after filter filters.
Further, in the ultra-clean discharge treating system of above-mentioned wet desulfurization flue gas, it is used for connecting described taking off
Blowdown flow meter and blowdown choke valve it is provided with on the pipeline of sulfur melt pit and described filter.
Analyze and understand, the open a kind of ultra-clean discharge treating system of wet desulfurization flue gas of the present invention, same with existing
Class technology has compared techniques below innovative point:
1, system has temperature-fall period, reclaims steam in flue gas, substantially can realize at ultra-clean discharge
Reason system zero moisturizing, has powerful water-saving function；
2, configuration atomization system, is possible not only to smoke abatement, can absorb SO further2、SO3Deng
Pollutant, are truly realized the deep purifying to flue gas；
3, movement-less part, body is unpowered equipment or consuming parts, system energy consumption is low, and has certainly
Clean function, can accomplish non-maintaining, and system operation and maintenance cost is few；
4, completing inside desulfurizing tower or flue, do not change tower body or flue structure, modularity is installed,
The system reform duration is short, and investment cost is low.
The ultra-clean discharge treating system of this wet desulfurization flue gas while realizing gas cleaning to the water in flue gas
Vapour recycles, and has powerful water-saving function, substantially can realize ultra-clean discharge treating system spot patch
Water, has saved cost.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, this
The schematic description and description of invention is used for explaining the present invention, is not intended that the improper limit to the present invention
Fixed.Wherein:
Fig. 1 is the schematic flow sheet of one embodiment of the invention；
Fig. 2 is that dedusting removes mist water saving unit construction principle figure；
Fig. 3 is cleaning equipment and the recirculated water filter plant structural representation of one embodiment of the invention；
Fig. 4 is that flue gas degree of depth dedusting is except the schematic diagram of mist water saving unit one embodiment；
Fig. 5 is the schematic diagram of the centrifuge dehumidifier of embodiment in Fig. 4；
Fig. 6 is the connection diagram one of strainer chamber and water collection device；
Fig. 7 is the connection diagram two of strainer chamber and water collection device；
Fig. 8 is the connection diagram three of strainer chamber and water collection device；
Fig. 9 is the schematic perspective view of embodiment in Fig. 4；
Figure 10 is that flue gas degree of depth dedusting is except the schematic diagram of mist water saving fixtures.
Description of reference numerals: 1 cleaning equipment；2 collect water tank；3 filtered water pumps；4 filters；5 mistakes
Water filtering tank；6 water circulating pumps；7 filtering traffic meters；8 filter water pressure transmitter；9 blowdown choke valves；
10 blowdown flow meters；11 desulfurization melt pits；12 discharging valves；13 discharging valves；14 coalescence polymeric segment；141
Room is clashed in cooling；142 venturis；143 coalescence rooms；144 first atomizers；15 centrifuge dehydration sections；
151 Inner guide；152 discharge outlet；153 strainer chambers；156 blades；157 outer barrels；158 water collection devices；
159 centrifuge dehumidifiers；16 attachment means.
Detailed description of the invention
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.It should be noted that not
In the case of conflict, the embodiment in the application and the feature in embodiment can be mutually combined.
As shown in Figure 1 to Figure 3, according to embodiments of the invention, it is provided that a kind of wet desulfurization flue gas surpasses
Clean discharge treating system, according to the workflow of this system: processing system includes:
Pressurised atomised equipment, for being humidified desulfurization fume, obtains the flue gas through humidification；
Cleaning equipment 1, cleaning equipment 1 is connected with pressurised atomised equipment, for carrying out the flue gas of humidification
Purify and realize the separation of gas-liquid-solid, obtain clean flue gas and the aqueous water comprising flue dust；
Recirculated water filter plant, recirculated water filter plant is connected with cleaning equipment 1, for comprising flue dust
Aqueous water filter, the aqueous water after being filtered, the aqueous water supply after filtration pressurised atomised sets
Standby recycling.
The work process of this system is: after desulfurization, saturated wet flue gas first passes around pressurised atomised equipment and increases
Wet, subsequently enter cleaning equipment, cleaning equipment purifies to the flue gas of humidification and realizes dividing of gas-liquid-solid
From, obtain clean flue gas and the aqueous water comprising flue dust；Final clean flue gas externally discharges, in flue gas
The aqueous water comprising flue dust enters recirculated water filter plant by collection device, comprises in the aqueous water of flue dust
Possibly together with other pollutant, such as SO2、SO3Deng pollutant.The aqueous water comprising flue dust is through filtering
Rear portion supplies pressurised atomised equipment and carries out reuse, and remaining supply desulphurization system uses.This wet desulphurization
Steam in flue gas, while realizing gas cleaning, is carried out reclaiming profit by the ultra-clean discharge treating system of flue gas
With, there is powerful water-saving function, substantially can realize ultra-clean discharge treating system spot patch water.
In the present invention, using which kind of pressurised atomised equipment unrestricted, increasing as long as realizing the atomization to flue gas
Wet.Preferably, the pressurised atomised equipment including booster pump, pipeline and atomizer, supercharging are used
Pump is connected with atomizer by pipeline, and fresh water (FW) or recirculated water pass through booster pump supercharging after filtering,
Realize atomization by atomizer, the effective humidification to flue gas can be realized, and cost can be reduced.
In the present invention, use which kind of cleaning equipment 1 unrestricted, as long as realizing the purification to flue gas.
Preferably, use flue gas degree of depth dedusting except mist water saving fixtures.Further, the dedusting of the flue gas degree of depth is except mist joint
Water device is made up of except mist water saving unit several dedustings, and dedusting is except mist water saving unit is by attachment means 16
Connect in rear bulkhead is arranged in parallel at desulfurizing tower or inside flue.Each dedusting is except mist water saving cell processing cigarette
Tolerance is at 5000 10000Nm3/ h, dedusting determines according to processing amount of flue gas emission except mist water saving element number.
Dedusting is made up of coalescence polymeric segment 14 and centrifuge dehydration section 15, by pressurised atomised equipment except mist water saving unit
The flue gas of humidification condenses in initially entering coalescence polymeric segment 14, then enters back into reality in centrifuge dehydration section 15
The separation of existing gas-liquid-solid.Dedusting is shown in Fig. 2, after atomizing except mist water saving unit construction principle figure
Flue gas enters dedusting and removes mist water saving unit, and flue gas mean flow rate in dedusting is except mist water saving unit is
8-14m/s, in coalescence polymeric segment 14 by flue gas flow rate, pressure are regulated, vaporous water in strengthening flue gas
Condense, complete the phase transformation of self, it is achieved fine particle or the reunion of submicron particles, promote fine particle
Or drop grows up, flue gas enters centrifuge dehydration section 15 subsequently, by the blade in centrifuge dehydration section 15
Arrange generation vortex street effect, it is achieved the separation of gas-liquid-solid.
Further, cleaning equipment 1 is as shown in Fig. 4 to Figure 10, and coalescence polymeric segment 14 includes that cooling is hit
Hit room 141, venturi 142, coalescence room 143 and the first atomizer 144；Centrifuge dehydration section 15 is wrapped
Include strainer chamber 153 and the centrifuge dehumidifier 159 being arranged in strainer chamber 153.Flue gas hits in entrance cooling
Hitting the process through pressurised atomised equipment before room 141, flue gas contains steam, steam after treatment
At dust surface aggregation and grow up；Pressurised atomised equipment is arranged at cooling and clashes into front, room 141
At 0.3m-1m, beneficially steam at dust surface aggregation and is grown up and then purifying smoke.Flue gas warp successively
Room 141, venturi 142, coalescence room 143 and strainer chamber 153 are clashed in supercooling.
Flue gas contains steam after treatment；It is hollow structure that room 141 is clashed in cooling, clashes in cooling
In room 141, steam at dust surface aggregation and is grown up；Venturi 142 is tubular structure, venturi 142
One end that room 141 is clashed into cooling in one end connects, the granule that steam and dust are formed in this venturi 142
Continue to grow up；Coalescence room 143 is cone tubular structure, and the small end of coalescence room 143 is another with venturi 142
One end connects, and the granule that steam and dust are formed in this coalescence room 143 continues to grow up；Strainer chamber 153
For tubular structure, i.e. outer barrel 157, one end of strainer chamber 153 connects with holding greatly of coalescence room 143,
In this strainer chamber 153, the effect of the granule power by centrifugation that steam and dust are formed rotates to strainer chamber 153
Separated and recovered after bucket wall, flue gas is discharged after deep purifying.
Further, in coalescence room 143, the first atomizer 144, the first atomizer 144 it are provided with
For forward (i.e. the direction of nozzle ejection water is identical with the flow direction of flue gas) or reverse (i.e. nozzle ejection
The direction of water is contrary with the flow direction of flue gas) atomizer, ejection water is for soluble in water in flue gas
Pollutant absorb.
Further, centrifuge dehumidifier 159 is arranged on the leading portion of strainer chamber 153, i.e. flue gas and enters filtering
Centrifuge dehumidifier 159 it is introduced into behind room 153.Centrifuge dehumidifier 159 is by blade 156, outer barrel 157 and
Inner guide 151 forms, the inner hollow of outer barrel 157, and Inner guide 151 is arranged in outer barrel 157
Heart portion, blade 156 is connected with Inner guide 151 and is placed in outer barrel.The outer barrel of centrifuge dehumidifier 159
157 can be a part for the tubular structure (i.e. outer barrel 157) of strainer chamber 153, it is also possible to filtering
The outer barrel 157 of room 153 is that then the two linked together use by two individualities separated, the present invention couple
This does not limits.Strainer chamber 153 is additionally provided with discharge outlet 152, and discharge outlet 152 is arranged on outer barrel 157
Bucket wall on, opening direction is radially, and discharge outlet 152 is preferably provided with 1-6, multiple discharge outlet 152
Circumference along outer barrel 157 sets gradually, and discharge outlet 152 is for discharging the granule that steam and dust are formed
Strainer chamber 153.Discharge outlet 152 is preferably axially arranged on the bucket wall of outer barrel 157, and it can be rectangle,
Now the long limit of discharge outlet is with axially in parallel, it is possible to effectively derived by the current on strainer chamber 153 inwall.
The distance of one end near in the two ends of two ends distance 157 barrels of walls of outer barrel of discharge outlet 152 is 50～200mm.
It is to close that Inner guide 151 formerly contacts one end of flue gas, i.e. flue gas can not be directly through Inner guide 151
Run to the back segment of strainer chamber 153, flue gas must be by could be to filtering after the rotating separation of blade 156
The back segment of room 153 runs.
Inner guide 151 the most formerly contacts one end of flue gas and the other end is cone structure, breaks in its center
Face is horn shape (15-60 °) or parabola shaped, totally sees that Inner guide 151 is in shuttle-type；In other are applied,
The other end of Inner guide 151 may be alternatively configured plane, but if the one end first contacting flue gas is plane,
Gas can form whirlpool in this position, increases resistance.
When flue gas is by centrifuge dehumidifier 159, flue gas is forced to rotate, under the influence of centrifugal force, and cigarette
Granule (including dust, drop) in gas is thrown on the inwall of outer barrel 157 of strainer chamber 153 so that
Granule in flue gas is separated, and the granule separated accumulates current, is discharged by discharge outlet 152
Unit, recycle and reuse.Flue gas after deep purifying is ultimately discharged into chimney.
Blade 156 is the particular curve made according to aerodynamic principle.The quantity of blade 156 can set
It is set to 4～16 (according to using environment to determine, such as, 6,8,10,15 etc.).
Environment is used to include exhaust gas volumn, available blast, the processing technique of blade 156 and the layout at scene
The composite factors such as space determine.Blade 156 is according to requirement classification three class of processing technique: flat board
Type, screw type, parabola shaped.Plate be conducive to and welding processing, be suitable for a small amount of machine-shaping；Spiral shell
In the case of rotation shape is suitable for flue gas routine flow velocity, with mould molding, mould is fairly simple；Parabola shaped suitable
In the case of closing flue gas high flow rate, with mould molding, mould is more complicated.
Further, strainer chamber 153 is provided with two centrifuge dehumidifiers 159, two centrifuge dehumidifiers 159
Set gradually on the path of flue gas, i.e. the leading portion at strainer chamber 153 is provided with a centrifuge dehumidifier
159, being additionally provided with another one centrifuge dehumidifier 159 in the stage casing at strainer chamber 153, two are centrifuged
Flue gas can preferably be purified by dehydrator 159.
Further, the other end of strainer chamber 153 i.e. back segment is additionally provided with water collection device 158, water collection device 158
The granule formed for loop configuration, the steam do not discharged from discharge outlet 152 for collection and dust.Receive water
Device 158 is possible to prevent to be separated to the bucket wall of outer barrel 157 and the water discharged without discharge outlet 152 and powder
The granule that dirt is formed is taken out of with flue gas, the granule that i.e. the bucket wall along outer barrel 157 is flowed by water collection device 158
First it is collected and stops that it moves to other place.The granule that steam is formed with dust separates from flue gas
After can be attached on the bucket wall of outer barrel 157, the steam on bucket wall follow air-flow the flow direction flowing, major part
Steam can be discharged by discharge outlet 152, have least a portion of steam to may proceed to follow the flow direction flowing of gas,
For preventing this part steam from being taken away by gas, the water collection device 158 arranging loop configuration at smoke outlet blocks
Cutting, the steam under intercepting flows out from the gap location between water collection device 158 and strainer chamber 153, makes on barrel wall
Steam will not be cleaned after gas take out of.The connection of strainer chamber 153 and water collection device 158 can be selected for
Lower three kinds of modes:
First kind of way, as shown in Figure 6, three middle road arrows are gas flows, the arrow of the right and left
Head is the flow direction of the granule of steam and dust formation.The granule that steam and dust are formed goes out from strainer chamber 153
Mouth enters the scope of water collection device 158 and is subject to certain restrictions, i.e. the outlet of strainer chamber 153 is more than water collection device
(above-mentioned outlet refers to the internal diameter of outlet and the external diameter of import with the comparison of import in the import of the gas of 158
Between comparison), flue gas flow rate has change slightly.Change because of flue gas flow rate can cause the increase of pressure,
Thus SR can be increased, so the impact that flue gas flow rate is changed by this setup is small, and then
Impact on SR is little；
The second way, as it is shown in fig. 7, the granule that formed of steam and dust from strainer chamber 153 export into
The scope entering water collection device 158 is more than water collection device 158 almost without restriction, the i.e. outlet of strainer chamber 153
Gas feed (comparison of above-mentioned outlet and import refer to outlet internal diameter and the external diameter of import between
Relatively), the output range of granule is 360 °, and flue gas flow rate changes greatly.Because this setup is to cigarette
The most greatly, and then the impact on SR is bigger in the impact of gas velocity change；
The third mode, as shown in Figure 8, the granule that steam and dust are formed from strainer chamber 153 export into
The scope entering water collection device 158 does not limit, owing to the bucket wall in the exit of strainer chamber 153 is provided with tiltedly
Degree, the size of the gas feed of the small end of the outlet of gradient part and water collection device 158 is basically identical,
(above-mentioned outlet relatively refers to outlet with import in the big gas feed held more than water collection device 158 of outlet
Internal diameter and the external diameter of import between comparison), the output range of granule is 360 °.But due to filtering
The bucket wall in the exit of room 153 is provided with gradient, so flue gas flow rate is not changed in substantially, but this
The strainer chamber 153 of the mode of kind is unsuitable for mould processing, in addition it is also necessary to by strainer chamber 153 and water collection device 158
Between be attached.
Further, the corner angle of the Taper Pipe of the cone tubular structure of coalescence room 143 is 1 °-30 °.
Further, it is cone tubular structure that room 141 is clashed in cooling, and small end and the larynx of room 141 is clashed in cooling
One end connection in road 142, the drift angle of Taper Pipe is θ, 30≤θ≤90 °.Also may be used in cooling shock room 141 simultaneously
Make tangent and parabolic.Three kinds of modes are respectively arranged with pluses and minuses: Taper Pipe shape structural drag is moderate, clash into
Effective；Tangent shape structural drag is little, and impact effects is bad；Parabolic shape structure inlet resistance is little, hits
Hit effect can also, but resistance to flow output is increased dramatically.
Multiple flue gas degree of depth dedustings remove except mist water saving unit combines the flue gas degree of depth by attachment means 16
Dirt removes mist water saving fixtures.
Flue gas degree of depth dedusting removes mist water saving fixtures, is installed on the desulfurizing tower after wet desulphurization Nei or in flue,
When flue gas after desulfurization flows through this device, clash into, cool down and coagulate between drop and the dust in flue gas
And, finally separated by fine grained strainer chamber, separate liquid and carry out back after wastewater treatment equipment processes
With.
Flue gas after wet desulphurization tower desulfurization enters dedusting except mist water saving fixtures, the fine dust in flue gas
With drop and the drop generation strong collision sprayed from pressurised atomised equipment, water in room 141 is clashed in cooling
Vapour starts at dust granules surface aggregation and grows up, sky when flowing through venturi 142, between dust and drop
Between compress further, increase subparticle (between dust and dust, between dust and drop, drop
And between drop) collision probability, subparticle diameter continue increase.In coalescence room 143, flue gas
Speed reduces, and temperature also begins to decline, and in flue gas, subparticle diameter increases further, now first
SO under the effect of atomizer 144 (or claiming absorption nozzle)2、SO3Etc. pollutant quilt soluble in water
Absorb further.Then flue gas enters strainer chamber 153, the effect of centrifugal force, fine in flue gas
Grain (including dust, drop) is separated, and the flue gas after deep purifying is ultimately discharged into chimney.In the degree of depth
In purification process, due to the reduction of temperature, the saturated water capacity of flue gas reduces, the saturated vapor portion in flue gas
Analyzing, after being filtered by supporting wastewater treatment equipment, supply absorbs and pressurised atomised equipment 11 follows
Ring uses.
Flue gas degree of depth dedusting uses advanced Aero-Space new and high technology except mist water saving unit, uses whirlpool reason
The flowing of opinion, turbojet engine blends principle (this principle that centrifuge dehumidifier 159 utilizes) and traction therapy that spray
Design of The Tube Wind Tunnel method (the method that room 141, venturi 142 and coalescence room 143 utilize is clashed in cooling),
And combine chemical industry coalescence polymerization principle develop (the first atomizer 144 and pressurised atomised equipment utilization
This principle), advanced treating further to flue gas after desulfurization, reduce further SO in flue gas2、SO3
Etc. pollutant levels soluble in water, dust concentration, free water content and saturated water capacity, with relatively low
Construction cost and operating cost meet the environmental requirement of increasingly stringent.
This flue gas degree of depth dedusting selects flexibly, to use metal or nonmetal except the material of mist water saving fixtures；
This device is unit-modularized design, according to processing flue gas flow, selects the appropriate number of flue gas degree of depth to remove
Dirt carries out the mode general assembly configuration of laid out in parallel except mist water saving unit, and this device arrangement is flexible, permissible
There is a following arrangement: tower top formula, horizontal flue type, vertical outlet chimney flue type etc..
Tower top formula: be mainly applied to the desulfuration chimney situation at tower top, particularly need in transformation project
The problem of installing space to be considered.
Horizontal flue type: this mode is mainly used for flue gas after desulfurizing tower from desulfurizing tower Base top contact,
Through one section of horizontal flue subsequently into the situation of desulfuration chimney.This mode equipment independent construction, to tower
Without destroying, safety is high.
Vertical outlet chimney flue type: this mode is mainly used for flue gas after desulfurizing tower from desulfurizing tower top
Draw, through one section of flue straight down subsequently into the situation of desulfuration chimney.This mode is standby independent
Construction, to tower without destroying, safety is high, and is more beneficial for the collection of water in centrifuge dehumidifier 159.
In the present invention, use which kind of recirculated water filter plant unrestricted, as long as realizing clean to recirculated water
Change.Preferably, employing includes collecting water tank 2, filter pump 3, filter 4, water tank with strainer 5
With the recirculated water filter plant of pipeline, wherein: collect water tank 2 and be connected with cleaning equipment 1 by pipeline,
For collecting the aqueous water comprising flue dust, concrete, by pipeline and the discharge outlet of cleaning equipment 1 and filter
Clear gap between room 153 with water collection device 158 connects；Filter pump 3 is by pipeline and collection water tank 2
Being connected, filter 4 is connected with filter pump 3 by pipeline, the liquid that filter pump 3 will be collected in water tank 2
Water filters in squeezing into filter 4, the water after being filtered and underflow；Water tank with strainer 5 passes through pipeline
Being connected with filter 4, the water after filtration enters water tank with strainer 5 and carries out physical sedimentation, after being precipitated
Water.
Further, recirculated water filter plant also includes water circulating pump 6, and water circulating pump 6 is by water tank with strainer
In 5, clear water after precipitation squeezes into pressurised atomised equipment reuse.
Further, it is provided with based on filtering traffic on the pipeline connecting filter 4 and water tank with strainer 5
7, filtering traffic meter 7 can carry out reality to the flow of the liquid being sent to water tank with strainer 5 by filter 4
Time measure and statistics, for connect be provided with on the pipeline of filter pump 3 and filter 4 filtration water pressure become
Send device 8, measure the outlet pressure of filtered water pump 3.
Further, recirculated water filter plant also includes that desulfurization melt pit 11, desulfurization melt pit 11 pass through pipeline
Connecting filter 4, the underflow obtained after de-entrainment filter 4 filters, this underflow is entered by desulphurization system
Row reuse.
Further, it is used for connecting being provided with blowdown flow on the pipeline of desulfurization melt pit 11 and filter 4
Meter 10 and blowdown choke valve 9, effusion meter 10 effect is to desulfurization melt pit 11 and the connection of filter 4
Flow measurement and statistics on pipeline；The effect of choke valve 9 is the flow of control of sewage disposal.
The structural representation of cleaning equipment 1 and recirculated water filter plant is as it is shown on figure 3, recirculated water filtration sets
Before standby startup, water tank with strainer 5 first injecting new water, new water is sent into pressurised atomised by ON cycle water pump 6
The atomizer of equipment is atomized, and then desulfurization wet flue gas enters cleaning equipment 1 from left side, carries out clean
Change processes, and arranges (can be discharged by chimney), comprise the liquid water collection of flue dust outside the flue gas after purification
To collecting water tank 2, open in the aqueous water comprising flue dust is squeezed into filter 4 by filtered water pump 3 and carry out certainly
Dynamic filtration, the water after filtration enters water tank with strainer 5 and carries out physical sedimentation, finally carries out reuse, filter
The underflow of 4 enters desulphurization system (desulfurization melt pit 11) and carries out reuse, the ultra-clean discharge of this wet desulfurization flue gas
After processing system circulation is got up, water tank with strainer 5 need not add Fresh process water, it is achieved system water saving
Function.
The ultra-clean discharge treating system of wet desulfurization flue gas that the present invention provides can be at existing desulfurizing tower or cigarette
Complete inside road, do not change former tower body or flue structure, pressurised atomised equipment, cleaning equipment 1 and circulation
Water filtration device can modularity be installed, and the system reform duration is short, and investment cost is low.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1, system has temperature-fall period, pressurised atomised equipment realize, system circulation get up after in flue gas
Steam reclaim, substantially can realize ultra-clean discharge treating system spot patch water, the water-saving function having；
2, configure pressurised atomised equipment, be possible not only to smoke abatement, SO can be absorbed further2、SO3
Deng pollutant, it is truly realized the deep purifying to flue gas；
3, cleaning equipment 1 movement-less part, unpowered equipment or consuming parts in cleaning equipment 1,
System energy consumption is low, and has self-cleaning function, can accomplish non-maintaining, and system operation and maintenance cost is few, only
Change equipment 1 modularity is arranged, flexible arrangement；
4, this system completes inside desulfurizing tower or flue, does not change tower body or flue structure, modularity
Installing, the system reform duration is short, and investment cost is low.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this area
Technical staff for, the present invention can have various modifications and variations.All in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvement etc. made, should be included in protection scope of the present invention
Within.
Claims (10)
1. the ultra-clean discharge treating system of wet desulfurization flue gas, it is characterised in that described processing system
Including:
Pressurised atomised equipment, for being humidified desulfurization fume, obtains the flue gas through humidification；
Cleaning equipment, described cleaning equipment is connected with described pressurised atomised equipment, for described humidification
Flue gas carries out purifying and realizing the separation of gas-liquid-solid, obtains clean flue gas and the aqueous water comprising flue dust；With
Recirculated water filter plant, described recirculated water filter plant is connected with described cleaning equipment, for bag
Aqueous water containing flue dust filters, the aqueous water after being filtered, the aqueous water supply after described filtration
Described pressurised atomised equipment recycles.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 1, its feature exists
In, described pressurised atomised equipment includes booster pump, pipeline and atomizer, and described booster pump is by described
Pipeline connects with described atomizer.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 1, its feature exists
In, described cleaning equipment is that flue gas degree of depth dedusting is except mist water saving fixtures.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 3, its feature exists
In, described flue gas degree of depth dedusting is made up of except mist water saving unit several dedustings except mist water saving fixtures, some
In individual described dedusting is arranged in parallel at desulfurizing tower after being connected by attachment means except mist water saving unit or in flue
Portion.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 3, its feature exists
In, described dedusting is made up of coalescence polymeric segment and centrifuge dehydration section except mist water saving unit, the cigarette of described humidification
Gas initially enter in described coalescence polymeric segment condense, then enter back into described centrifuge dehydration section in realize gas-liquid
Solid separation.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 1, its feature exists
In, described recirculated water filter plant includes collecting water tank, filter pump, filter, water tank with strainer and pipeline,
Wherein:
Described collection water tank is connected with described cleaning equipment by pipeline, for collecting the liquid comprising flue dust
Water；
Described filter pump is connected with described collection water tank by pipeline, and described filter passes through pipeline with described
Filter pump is connected, and described filter pump is carried out in the aqueous water in described collection water tank is squeezed into described filter
Filter, the water after being filtered and underflow；
Described water tank with strainer is connected with described filter by pipeline, and the water after described filtration entered drainage
Case carries out physical sedimentation, the water after being precipitated.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 6, its feature exists
In, described recirculated water filter plant also includes water circulating pump, and described water circulating pump is by described water tank with strainer
Water after precipitation squeezes into described pressurised atomised equipment reuse.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 6, its feature exists
In, it is provided with on the pipeline connecting described filter and described water tank with strainer based on filtering traffic, is used for
Connect and on the pipeline of described filter pump and described filter, be provided with filtration water pressure transmitter.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 6, its feature exists
In, described recirculated water filter plant also includes desulfurization melt pit, and described desulfurization melt pit connects described by pipeline
Filter, for collecting the underflow obtained after described filter filters.
The ultra-clean discharge treating system of wet desulfurization flue gas the most according to claim 9, its feature exists
In, it is provided with based on blowdown flow and blowdown on the pipeline connecting described desulfurization melt pit and described filter
Choke valve.
Priority Applications (1)
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| CN201610626168.2A CN106000013A (en) | 2016-08-02 | 2016-08-02 | Wet desulfurization flue gas ultra-clean emission treatment system |
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| CN201610626168.2A CN106000013A (en) | 2016-08-02 | 2016-08-02 | Wet desulfurization flue gas ultra-clean emission treatment system |
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