CN206809978U - A kind of multistage bundled tube dedusting demister - Google Patents
A kind of multistage bundled tube dedusting demister Download PDFInfo
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- CN206809978U CN206809978U CN201720033979.1U CN201720033979U CN206809978U CN 206809978 U CN206809978 U CN 206809978U CN 201720033979 U CN201720033979 U CN 201720033979U CN 206809978 U CN206809978 U CN 206809978U
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- bundled tube
- tube dedusting
- dedusting demister
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- coalescence
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Abstract
The utility model discloses a kind of multistage bundled tube dedusting demister, belong to exhaust-gas treatment field.The device is located at the top of spraying layer in absorption tower, and described device includes n level bundled tube dedusting demisters from down to up, and coalescence device is provided between the connected bundled tube dedusting demister of at least one set；Described coalescence device includes atomization conduit, and described atomization conduit is provided with several atomizers.The utility model in different eddy flow component interlayers by increasing coalescence device, improve fine particle dusts and spray into the probability of generation inertial collision, interception and coalescence between coalescence drop, improve dust can catching, removal efficiency is improved under equal eddy flow component series, reaching the eddy flow component series needed for equal efficiency in other words reduces, and reduces investment and operating cost.
Description
Technical field
The utility model belongs to exhaust-gas treatment field, and in particular to a kind of multistage bundled tube dedusting demister.
Background technology
At present, the existing coal unit in China generally uses lime stone --- gypsum wet flue gas desulfurizing technique, from absorption
In the wet flue gas of tower discharge in addition to the dust not eliminated containing part front end deduster, it is in fine mist shape also to contain substantial amounts of
State lime stone, gypsum slurries etc., with the raising increasingly of state environmental emissioning standard, depth need to be carried out to the neat stress after desulfurization
Dedusting.According to newest promulgation《Fossil-fuel power plant atmospheric pollutant emission standard》, 5mg/ is proposed to the dust concentration of smoke stack emission
m3Requirement.
The dedusting demisting of flue gas is technique most commonly seen in fume purifying processes, and type is varied, but for containing
For the processing of the saturation wet flue gas of a large amount of droplets, there is the intractability of reality.In order to solve fine dust, particulate
Deng the small miscellaneous dirt separation of particle diameter, part of generating units is handled using deflection plate demister+WESP (wet type electrostatic precipitator), but for
Retrofit work amount is huge for built desulfurization unit, generally existing absorption tower body need to be increased, strengthening of foundation, transforms the cycle
It is long, and it contains substantial amounts of high voltage electric equipment, operation and operation difficulty are larger.
A kind of substitute technology of the bundled tube dedusting demister as WESP, because its is simple in construction, reliable, energy consumption is low
And it is used widely.Bundled tube dedusting demister is a kind of gas-liquid separator based on centrifugal force separate, utilizes rotary pneumatic
The centrifugal action of stream, the drop carried secretly in air-flow is got rid of to wall peripheral, fine drop, fine solid particle particle in flue gas, gas
The reunion that collides with each other of the finely ground particles such as colloidal sol is condensed into big drop, and big drop is captured by cyclone cylinder surface liquid film again, so as to real
Now separate and remove with gas phase, there is the advantages that pressure drop is small, defogging effect is preferable, simple in construction, transformation implementation is simple, it is especially suitable
For the waste gas demisting in acid mist after wet desulphurization with solid or with salinity.
Such demister is the separation that drop or particle are realized by centrifugal force, when load is relatively low or grain diameter
When too small, because when centrifugal force is smaller or centrifugal force is not enough to make separate small, separative efficiency is poor, is removed although can improve
The series of day with fog reaches certain removal efficiency, but invests and be substantially increased with operating cost, even if or even increasing under partial picture
Demister series is also difficult to meet emission request.
Utility model content
The defects of the utility model exists for existing above-mentioned technology provides a kind of multistage bundled tube dedusting demister.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of multistage bundled tube dedusting demister, the device are located at the top of spraying layer in absorption tower, described device
Include n level bundled tube dedusting demisters from down to up, coalescence is provided between the bundled tube dedusting demister that at least two-stage is connected
Device；Described bundled tube dedusting demister includes m bundled tube dedusting demisting unit, described bundled tube dedusting demisting unit
The z eddy flow component including cylindrical outer barrel and in cylindrical outer barrel, described eddy flow component include several eddy flows
Blade and a central tube, swirl vane are evenly distributed between center drum outer wall and cylindrical outer barrel inwall at an oblique angle
Annular section in；Described coalescence device includes atomization conduit, and described atomization conduit is provided with several atomizers；
Coalescence liquid is process water, steam or the process water for adding chemical agglomeration agent used by coalescence device；
Wherein：N >=2, m >=2, z >=1；
Described addition chemical agglomeration agent is the mixture of high polymer flocculant, wetting agent and inorganic additives, described
High polymer flocculant be polyacrylamide, polyethylene glycol oxide, polyvinyl alcohol, one in polyvinylpyrrolidone and polyvinylether
Kind is a variety of；Described wetting agent is sulfonated oil, the one or more in thio-alcohol, hydrazides class and mercaptan acetals；Described
Inorganic additives are sodium phosphate；
In some preferable technical schemes：Addition chemical agglomeration agent process water be in process water add 0.5%~
2.5% chemical agglomeration agent, described chemical agglomeration agent be 0.004%~0.25% high polymer flocculant, 0.0002~
0.02% wetting agent and 0.001~0.05% inorganic additives, remaining is water.
In technical solutions of the utility model：The atomizing particle size of the atomizer is 20~80 μm.
In technical solutions of the utility model：Described connected eddy flow component is provided with liquid film interception and collector, described liquid
Film intercepts and collector includes intercepting ring and collects hole, and described interception ring is located at cylindrical outer barrel internal perisporium, described collection
Hole position is between cylindrical outer barrel and interception ring；Described collection hole is semicircle, circular or waist-hole type, preferably described collection
Hole is semicircle.
In technical solutions of the utility model：Be provided with baffle ring at the top of bundled tube dedusting demisting unit, the baffle ring it is interior
Footpath is the 85~95% of the internal diameter of cylindrical outer barrel.
In technical solutions of the utility model：Z >=2, described bundled tube dedusting demisting unit are provided with z-1 levels altogether from down to up
Liquid film intercepts and collector, and the perforated area in described -1 grade of collection hole of pth is more than the perforated area that pth level collects hole, 1≤p
≤z-1。
In technical solutions of the utility model：Between adjacent bundled tube dedusting demisting unit and bundled tube dedusting demisting unit with
Lower end seal plate and upper end seal plate are equipped between absorption inner wall of tower.
In technical solutions of the utility model：It is provided between the connected eddy flow component of at least one set and rinses water system；It is described
Rinse-system include wash tub pipe, the top of described wash tub pipe is provided with flooding nozzle, and the bottom of wash tub pipe is provided with punching
Wash water pipe joint.
In technical solutions of the utility model：Punching is provided with the above and or below of at least one-level bundled tube dedusting demister
System is washed, described rinse-system includes flushing water main pipe, and some flushing pipe network nozzles are provided with described flushing water main pipe.
Bundled tube dedusting demister is a kind of gas-liquid separator based on centrifugal force separate, utilizes the centrifugation of swirling eddy
Effect, the drop carried secretly in air-flow is got rid of to wall peripheral, the thickness and height of the liquid film of wall can be with the drops in flue gas
Being increased sharply with amounts of particles, liquid film is blocked up to make operation resistance excessive, can increase the possibility of reentrainment when liquid film is too high, these
The decline of operating characteristics will be caused.Utility model people is had found by setting liquid film interception and collector by repeatedly studying, interior
Footpath is arranged to as the 0.85~0.95 of wall internal diameter.It is the liquid for upper strata that liquid film interception and collector, which open up a number of hole,
Physical efficiency smoothly flows down along wall, and is not to flow on the inside of flue gas and causes reentrainment.Preferable semicircular hole is main
It is for the ease of along wall following current.The total amount of liquid of the total area of perforate in removing flue gas determines.On the ratio of lower floor
Layer hole is because the liquid on upper strata converges and flows into lower floor mostly.
The beneficial effects of the utility model：
It is solidifying with spraying into improve fine particle dusts by increasing coalescence device in different eddy flow component interlayers for the utility model
And the probability of inertial collision, interception and coalescence occurs between drop, improve dust can catching, in equal eddy flow component level
Removal efficiency is improved under several, reaching the eddy flow component series needed for equal efficiency in other words reduces, and reduces investment and operation
Cost.
Brief description of the drawings
Fig. 1 is the front view of multistage bundled tube dedusting demister；
Fig. 2 is the A-A sectional views of multistage bundled tube dedusting demister；
Fig. 3 is the B-B sectional views of multistage bundled tube dedusting demister；
Fig. 4 is the second embodiment front view of multistage bundled tube dedusting demister；
Fig. 5 is the 3rd embodiment front view of multistage bundled tube dedusting demister；
Fig. 6 is the front view of liquid film interception and collector；
Wherein：1 is smoke inlet, and 2 be first order bundled tube dedusting demister, and 3 be coalescence device, and 4 be that the second level is restrained
Formula dedusting demister, 5 be exhanst gas outlet, and 6 be upper sealing panel, and cylinder centered on 7,8 be cylindrical outer barrel, and 9 be swirl vane, and 10 are
Atomization conduit, 11 be atomizer, and 12 be atomization conduit adpting flange, and 13 be bundled tube dedusting demisting unit, and 14 spray to rinse
Mouth, 15 be wash tub pipe, and 16 be wash tub pipe joint, and 17 be lower sealing plate, and 18 be to absorb tower wall, 19 flushing pipe network nozzles, 20
It is wash tub pipe adpting flange for flushing water main pipe, 21,22 be drainpipe, and 23 be liquid film interception and collector, and 24 is intercept ring,
25 be collection hole.
Embodiment
The utility model is described further with reference to embodiment, but the scope of protection of the utility model is not limited to
This：
Embodiment 1
Such as Fig. 1~5, a kind of multistage bundled tube dedusting demister, the device is located at the top of spraying layer in absorption tower, institute
The device stated includes n level bundled tube dedusting demisters from down to up, between the bundled tube dedusting demister that at least two-stage is connected
Provided with coalescence device (3)；Described bundled tube dedusting demister includes m bundled tube dedusting demisting unit (13), described pipe
Beam formula dedusting demisting unit (13) includes cylindrical outer barrel (8) and the z eddy flow component in cylindrical outer barrel (8), described
Eddy flow component include several swirl vanes (9) and a central tube (7), swirl vane (9) is uniform at an oblique angle
It is centrally located in the annular section between cylinder (7) outer wall and cylindrical outer barrel (8) inwall；Described coalescence device (3) includes
Atomization conduit (10), described atomization conduit (10) are provided with several atomizers (11)；
Coalescence liquid is process water, steam or the process water for adding chemical agglomeration agent used by coalescence device；
Wherein：N >=2, m >=2, z >=1；
Described addition chemical agglomeration agent is the mixture of high polymer flocculant, wetting agent and inorganic additives, described
High polymer flocculant be polyacrylamide, polyethylene glycol oxide, polyvinyl alcohol, one in polyvinylpyrrolidone and polyvinylether
Kind is a variety of；Described wetting agent is sulfonated oil, the one or more in thio-alcohol, hydrazides class and mercaptan acetals；Described
Inorganic additives are sodium phosphate.The process water of more preferably described addition chemical agglomeration agent is that 0.5% is added in process water
~2.5% chemical agglomeration agent, described chemical agglomeration agent be 0.004%~0.25% high polymer flocculant, 0.0002~
0.02% wetting agent and 0.001~0.05% inorganic additives, remaining is water.
The atomizing particle size of the atomizer (11) is 20~80 μm.
Described connected eddy flow component is provided with liquid film interception and collector (23), and described liquid film intercepts and collector includes
Intercept ring (24) and collect hole (25), described interception ring (24) is located at cylindrical outer barrel (8) internal perisporium, described collection hole
(25) between cylindrical outer barrel (8) and interception ring (24)；Described collection hole (25) is semicircle, circular or waist-hole type,
It is preferred that described collection hole (25) is semicircle.
Baffle ring is provided with the top of bundled tube dedusting demisting unit (13), the internal diameter of the baffle ring is cylindrical outer barrel (8)
Internal diameter 85~95%.
Z >=2, described bundled tube dedusting demisting unit (13) are provided with the interception of z-1 levels liquid film and collector altogether from down to up,
The perforated area in described -1 grade of collection hole of pth is more than the perforated area that pth level collects hole, 1≤p≤z-1.
It is equipped between adjacent bundled tube dedusting demisting unit and between bundled tube dedusting demisting unit and absorption inner wall of tower
Lower end seal plate (17) and upper end seal plate (6).
It is provided between the connected eddy flow component of at least one set and rinses water system；Described rinse-system includes wash tub pipe
(15), the top of described wash tub pipe (15) is provided with flooding nozzle (14), and the bottom of wash tub pipe (15) is provided with wash tub pipe
Joint (16).
Such as Fig. 4, embodiment two gives a kind of multistage bundled tube dedusting demister, the eddy flow component of its every grade demister
Only one, the design of shower water can be simplified in this case, shower water is arranged at least one-level bundled tube dedusting demister
Above and or below be provided with rinse-system, described rinse-system includes flushing water main pipe (20), in described flushing jellyfish
Manage (20) and be provided with some flushing pipe network nozzles (19).
Such as Fig. 6, embodiment three then gives a kind of prioritization scheme of embodiment two.Flushing water is rinsing demister eddy flow group
While part, part content in flue gas is also increased, processing load and difficulty are also just improved, in embodiment three, by taking
Disappear upper sealing panel 6, and the water droplet that the drop gravitational settling under being removed in flushing water and partial fume is formed enters demisting unit outer barrel
The downward sealing plate 17 of cocurrent in space between absorption tower, and draining can be opened up at sealing plate upper limb under the tower wall on absorption tower
Pipe 22 draws slurries outside absorption tower.
Bundled tube dedusting demister is a kind of gas-liquid separator based on centrifugal force separate, utilizes the centrifugation of swirling eddy
Effect, the drop carried secretly in air-flow is got rid of to wall peripheral, fine drop, fine solid particle particle, aerosol in flue gas etc. are micro-
The small particle reunion that collides with each other is condensed into big drop, and big drop is captured by cyclone cylinder surface liquid film again, so as to realize and gas phase
Separate and remove.Centrifugal force is directly proportional to 3 powers of particle diameter, particle or drop is had enough centrifugal force, particle
Or drop must have enough particle diameters, typically, eddy flow component for the particle more than 18 μm separative efficiency up to 99%
Left and right, but because the presence of the factors such as reentrainment, actual efficiency are less than the numerical value, in other words, by one-level (or two
Level) after eddy flow component, the particle in flue gas more than 18 μm has removed substantially, and remainder is mostly the particle less than 18 μm.Examination
As shown by data is tested, after wet desulphurization (after spraying layer), the proportion that PM2.5 and PM10 account for total particle is at a relatively high, and part power plant is very
To having reached 76% and 51% or so, that is to say, that the total amount of this part dust is possible to exceed emission limit (5mg/m3).Adopt
Coal-fired hot pilot system research is carried out with said apparatus, 1% chemical agglomeration agent, described chemical radicals are added in process water
Poly- agent is 0.004%~0.25% polyacrylamide, 0.0002~0.02% sulfonated oil and 0.001~0.05% phosphoric acid
Sodium, remaining is water.Promote electric precipitation removing PM2.5 experimental study in the addition chemical agglomeration agent of electric cleaner inlet flue gas, grind
Study carefully the change of PM2.5 concentration and its size distribution before and after agglomerator adds, the results showed that, using the utility model device
PM2.5 increases to original four times or so, and electric cleaner outlet PM2.5 concentration reduces by more than 80% under typical condition.Using this
Utility model device PM10 is increased to and four times or so originally, and electric cleaner outlet PM10 concentration reduces under typical condition
More than 85%.
Claims (10)
- A kind of 1. multistage bundled tube dedusting demister, it is characterised in that：The device is located at the top of spraying layer in absorption tower, institute The device stated includes n level bundled tube dedusting demisters from down to up, between the bundled tube dedusting demister that at least two-stage is connected Provided with coalescence device (3)；The bundled tube dedusting demister includes m bundled tube dedusting demisting unit (13), described tube bank Formula dedusting demisting unit (13) includes cylindrical outer barrel (8) and the z eddy flow component in cylindrical outer barrel (8), described Eddy flow component includes several swirl vanes (9) and a central tube (7), and swirl vane (9) uniformly divides at an oblique angle Cloth is in the annular section between central tube (7) outer wall and cylindrical outer barrel (8) inwall；Described coalescence device (3) includes mist Change pipeline (10), described atomization conduit (10) is provided with several atomizers (11)；Coalescence liquid is process water, steam or the process water for adding chemical agglomeration agent used by coalescence device；Wherein：N >=2, m >=2, z >=1；Described adds the mixture that chemical agglomeration agent is high polymer flocculant, wetting agent and inorganic additives, described height Flocculation of collected object agent is polyacrylamide, polyethylene glycol oxide, polyvinyl alcohol, one kind in polyvinylpyrrolidone and polyvinylether or It is a variety of；Described wetting agent is sulfonated oil, the one or more in thio-alcohol, hydrazides class and mercaptan acetals；Described is inorganic Salt additives are sodium phosphate.
- 2. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：Add the work of chemical agglomeration agent Skill water is 0.5%~2.5% chemical agglomeration agent of addition in process water, and described chemical agglomeration agent is 0.004%~0.25% High polymer flocculant, 0.0002~0.02% wetting agent and 0.001~0.05% inorganic additives, remaining is water.
- 3. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：The atomizer (11) Atomizing particle size is 20~80 μm.
- 4. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：Described connected eddy flow component Intercepted provided with liquid film and collector (23), the interception of described liquid film and collector include intercepting ring (24) and collect hole (25), institute The interception ring (24) stated is located at cylindrical outer barrel (8) internal perisporium, and described collection hole (25) is located at cylindrical outer barrel (8) and intercepted Between ring (24)；Described collection hole (25) is semicircle, circular or waist-hole type.
- 5. multistage bundled tube dedusting demister according to claim 4, it is characterised in that：Described collection hole (25) is It is semicircle.
- 6. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：Bundled tube dedusting demisting unit (13) top is provided with baffle ring, and the internal diameter of the baffle ring is the 85~95% of the internal diameter of cylindrical outer barrel (8).
- 7. multistage bundled tube dedusting demister according to claim 4, it is characterised in that：Z >=2, described bundled tube Dedusting demisting unit (13) is provided with the interception of z-1 levels liquid film and collector, the perforated area in -1 grade of collection hole of pth altogether from down to up More than the perforated area that pth level collects hole, 1≤p≤z-1.
- 8. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：Adjacent bundled tube dedusting demisting Lower end seal plate (17) and upper end seal plate are equipped between unit and between bundled tube dedusting demisting unit and absorption inner wall of tower (6)。
- 9. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：In the connected rotation of at least one set It is provided between stream component and rinses water system；Described rinse-system includes wash tub pipe (15), described wash tub pipe (15) Top is provided with flooding nozzle (14), and the bottom of wash tub pipe (15) is provided with wash tub pipe joint (16).
- 10. multistage bundled tube dedusting demister according to claim 1, it is characterised in that：In at least one-level bundled tube The above and or below of dedusting demister is provided with rinse-system, and described rinse-system includes flushing water main pipe (20), described Flushing water main pipe (20) be provided with it is some flushing pipe network nozzles (19).
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| CN201720033979.1U CN206809978U (en) | 2017-01-11 | 2017-01-11 | A kind of multistage bundled tube dedusting demister |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823646A (en) * | 2017-01-11 | 2017-06-13 | 南京宇行环保科技有限公司 | A kind of multistage bundled tube dedusting demister |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823646A (en) * | 2017-01-11 | 2017-06-13 | 南京宇行环保科技有限公司 | A kind of multistage bundled tube dedusting demister |
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