CN108043191A - A kind of device and method of Sodium/Calcium dual alkali scrubbing FGD process - Google Patents
A kind of device and method of Sodium/Calcium dual alkali scrubbing FGD process Download PDFInfo
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- CN108043191A CN108043191A CN201810060177.9A CN201810060177A CN108043191A CN 108043191 A CN108043191 A CN 108043191A CN 201810060177 A CN201810060177 A CN 201810060177A CN 108043191 A CN108043191 A CN 108043191A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a kind of type sodium-calcium double alkali method smoke gas desulfurizing device and methods.The main equipment of desulfurizer is that multistage cross flow is rotary packed bed, mainly including housing, shaft, liquid distribution trough, filler rotor and filler stator.Frequency modulation motor outside housing is connected with shaft, and filler rotor is driven to rotate at a high speed；Filler stator is mounted between two layers of adjacent filler rotor, is begun from filler rotor, whole from filler stator, interleaved；Filler rotor center is equipped with liquid distribution trough, and uniformly several holes are provided with, it can be achieved that liquid is uniformly distributed on liquid distribution trough.Cross_flow rotating packed bed is applied among flue gas desulfurization by sodium-calcium dual-alkali scrubbing method technique, equipment volume and floor space can be reduced significantly, while SO is absorbed for sodium base lye2This gas-film controlled system effectively strengthens mass transfer between gas-liquid, improves desulfuration efficiency, reach the requirement of minimum discharge.
Description
Technical field
The present invention relates to a kind of device and methods of Sodium/Calcium dual alkali scrubbing FGD process, belong to flue gas desulfurization technique field.
Background technology
SO2It is most important harmful components among atmosphere pollution, drastically influences ecological environment and the health of the mankind,
Therefore, the SO in flue gas is removed2It is that it is controlled to pollute the most efficient method of environment.At present, countries in the world research and development, use it is de-
Except SO2Technology already exceed more than 200 kinds, according to the difference of desulfurizing agent and desulfurization method, can substantially be divided into dry desulfurization, wet
Method desulfurization and semi-dry desulphurization, wherein, Wet Flue Gas Desulfurization Technology is started from the 1930s, because it is big, de- with treating capacity
The features such as except efficient, technical maturity and be used widely, have become using it is largest, commercially produce it is most de-
Sulphur mode, compared to the method for more these types of desulfurization, the ratio maximum in the whole nation or even world's application is Wet Flue Gas Desulfurization Technique, is accounted for
85% or so, mainly there are limestone/gypsum method, magnesium oxide method, seawater method, Dual alkali etc..
At present, the sulfur removal technology that industrial production is most widely used in the middle, technology is the most ripe is limestone/gypsum method,
The method is a major advantage that absorbent is resourceful, cheap and easy to get, equipment operation condition is stablized etc., but simultaneously there is also some not
Foot, such as：Desulfurizing tower takes up a large area；Absorbent and the SO in flue gas2Reaction generation CaSO3Or CaSO4, easily fouling and clogging pipe
Road nozzle etc..If the SO in flue gas is absorbed using sodium base aqueous slkali merely2, higher desulfuration efficiency can be reached, but absorbed
Agent expense is also very high, and desulfurization product is not disposable, and plant produced is all difficult to bear its operating cost.Based on this, with reference to this two
The advantages of kind sulfur removal technology, Sodium/Calcium double alkali method flue gas desulfurization technology is researched and developed in the 1970s, solved desulfurizing tower
Desulfuration efficiency is drastically increased while the fouling and clogging problem of pipeline.
The desulfurization technology is applied in Medium ＆ small size power plant in the development after decades, desulfurization effect
Fruit is apparent, is realizing industrialization continuous production with very big potentiality, therefore the technology is subject to domestic and international extensive concern.But
It is that lye sulfur dioxide absorption belongs to a gas-film controlled system more, through literature survey, traditional tower is not enough to strengthen gas
Liquid mass transport process, so that influencing the utilization rate of desulfuration efficiency and desulfurizing agent；And traditional desulfurizing tower equipment volume and occupation of land
Area is big, and gas-phase pressure drop is larger, and operating cost is high.So by improving desulphurization plant, desulfuration efficiency is improved, reduces cost of investment
Have great importance to the business application for realizing Sodium/Calcium Dual alkali.
After the development of more than 30 years, structure was obtained continuously improving with perfect, understood through literature survey high-gravity technology, general
It is logical it is rotary packed bed be merely capable of strengthening film mass transfer process well, therefore, it is necessary to develop design to increase gas rapids
Traverse degree strengthens mass transferring in gas phase process, to adapt to requirement of the processing compared with high gas velocity, big flow coal-fired flue-gas so that single device
Just up to the standard of minimum discharge.
The content of the invention
The present invention is intended to provide a kind of device and method of Sodium/Calcium dual alkali scrubbing FGD process, proposes multistage cross flow rotary filling
Expect bed apparatus, be applied among Sodium/Calcium double alkali method flue gas desulfurization technology, using sodium base lye as absorbent, greatly
Strengthen mass transport process while, effectively improve desulfuration efficiency, reduce the use of desulfurizing agent, so as to further reduce desulfurization into
This.
The present invention combines Sodium/Calcium double alkali method flue gas desulfurization technology with high-gravity technology, by multistage cross flow rotary filling
Expect bed apparatus in flue gas desulfurization technique.Sodium/Calcium double alkali method flue gas desulfurization technology is broadly divided into tower to be regenerated outside desulfurization and tower
Two parts, basic principle are：Using sodium base lye in desulphurization plant with the SO in flue gas2Reaction, generation sodium sulfite and
Then metabisulfite solution will absorb rich solution and import regenerated reactor, lime or lime stone will be passed through in regenerated reactor, reacts the regeneration of generation
Liquid hydrogen sodium oxide molybdena is returned in desulfurizing tower and recycled；After sulfur removal technology is combined with super-gravity device, air film is greatly enhanced
Mass transport process.
It is rotary packed bed including multistage cross flow the present invention provides a kind of device of Sodium/Calcium dual alkali scrubbing FGD process, rotation
The main body of packed bed by housing, shaft and filler stator and can high-speed rotating filler rotor form.Wherein, rotate
The top of packed bed housing is equipped with exhaust pipe, and bottom is equipped with drain pipe, top side connection inlet tube, the connection air inlet of lower section side
Pipe；The lower end of shaft is connected with external frequency modulation motor, equipped with two or more filler rotors, static filler in shaft
Stator is mounted between filler rotor, and the two interleaved is set；Filler rotor center is equipped with liquid distribution trough, the liquid point
Cloth device is connected with inlet tube, and inlet tube is connected with the storage tank of sodium base lye.
In above device, the rotary packed bed filler is divided into three layers or three layers or more, and every layer of filler is all by pillar
The packing support component that is formed with the stainless steel plates of uniform pore openings supports, and using fishing net shaped silk screen by plastics garland or
Pall ring filler filling gets up to be fixed in rotor.Filler stator, the filler rotor are installed between two filler rotors
It is welded with shaft, the case weld of filler stator and revolving bed.
In above device, the liquid distribution trough includes ring sleeve, collecting tank, diversion pipe, and ring sleeve is by two
What coaxial sleeve collectively formed, two coaxial sleeve composition overall structures are placed on the outside of shaft, in the outer tube wall of ring sleeve
On be uniformly provided with several holes, be filler rotor on the outside of ring sleeve；Collecting tank is circular ring shape, positioned at the bottom of upper strata ring sleeve
On the outside of portion, welded with revolving bed inner walls；Collecting tank is communicated by diversion pipe with lower floor ring sleeve；Upper strata ring sleeve spray
It after the liquid gone out is sheared through high-speed rotating filler rotor, is collected by housing in collecting tank, lower floor is flowed into along diversion pipe
In ring sleeve.
In above device, the ring sleeve is arranged between shaft and filler rotor, and ring sleeve outer wall is uniform
Several holes are provided with, which is round hole or grate opening, and the quantity in hole depends on fluid flow and flow velocity；In filler stator region,
To prevent that gas is short-circuit, connected by welding between ring sleeve and filler stator.
In above device, the collecting tank is circular ring shape, and section is by annular sheet, inner cylinder, revolving bed housing
The U-lag of inner wall composition, collecting tank are located at revolving bed case inside, the bottom outside of upper strata ring sleeve；Annular sheet is vertical
It in inner walls and is welded in inner walls, for collecting liquid；The inner cylinder is and the body concentric cylinder of shell, inner cylinder
Bottom is welded as a whole with annular sheet.Liquid is collected in collecting tank, is flowed into through diversion pipe in lower floor's ring sleeve.It is described
Inner cylinder parallel to revolving bed shaft set, the height of inner cylinder is determined by fluid flow, and the liquid of collection cannot surpass
Cross the height of inner cylinder.
In above device, the diversion pipe is round tube, and upper end is connected with collecting tank, lower end and next layer of liquid point
Cloth device is connected；Diversion pipe is arranged below collecting tank, is uniformly provided with 2 ~ 8, along the uniform court obliquely of collecting tank circumferencial direction
Center of circle direction is set, and several diversion pipes form pyramidal structure.
In above device, annular sheet and the diversion pipe welding top of the sump bottom are equipped with gear liquid piece, are convenient for
Liquid is collected, the height of gear liquid piece will be less than inner cylinder so that the liquid of collection is easily flowed into diversion pipe.
In above device, the air inlet pipe is equipped with air blower and flowmeter.
In above device, the inlet tube is equipped with valve and flowmeter.
In above device, described air outlet pipe one end is equipped with demisting packing layer.
It is rotary packed bed using above-mentioned multistage cross flow the present invention provides a kind of method of Sodium/Calcium dual alkali scrubbing FGD process
Device, comprise the following steps：
Air is passed through into air blower and the SO in steel cylinder2Mixing is as simulated flue gas, after being measured through flowmeter, from rotation
The gas feed of bed bottom enters, and under the effect of the pressure, by the high-speed rotating filler of first layer, continues spiral,
In filler stator, it is subject to blocking for static filler stator, weakens the trend of circumferential movement, gas obtains in filler stator
The disturbance of air-flow is also increased while redistribution, the gas of redistribution continues to ascend into upper strata filler rotor, again
It is subject to the shear action of high-speed rotating filler, adds the disturbance of air-flow, increases the phorogenesis between gas and filler,
Reduce air film resistance so that mass transferring in gas phase is strengthened.
Prepared sodium base lye by centrifugal pump is pressurized, is measured through electromagnetic flowmeter, liquid is from rotary packed bed top
The liquid-inlet in portion is into packing layer inner edge is uniformly sprayed at after rotary packed bed, in the centrifugal force of high-speed rotating filler rotor
It under effect, radially throws away around, is collected by rotary packed bed outer wall along wall and flowed down, eddy flow enters in collecting tank, makees in gravity
Under, enter lower floor's liquid distribution trough along diversion pipe, it, will by the circular hole or grid of liquid distribution trough after assembling a certain amount of liquid
Liquid is sprayed at the inner edge of next layer of filler, and under the action of the centrifugal force, liquid is subject to huge shearing force, be cut into drop,
Brin, liquid film are radially thrown away around through filler, are arranged after being collected by outer wall from the liquid outlet of rotary packed bed bottom
Go out；
Meanwhile the gas feed of gas from rotary packed bed bottom enters in packed bed, and multistage mistake is formd between liquid
Stream-counter current contacting.
Beneficial effects of the present invention：
In the present invention, Sodium/Calcium double alkali method flue gas desulfurization technology with high-gravity technology is combined together, utilizes high-gravity technology
Unique advantage is efficiently solved among traditional tower, since sodium base lye absorbs SO2Belong to gas-film controlled and cause
The problems such as absorption efficiency is high, equipment volume takes up a large area and absorbent consumption is big.Meanwhile in traditional technique
In, it is limited by absorbent expense, Sodium/Calcium Dual alkali is only applicable to Medium ＆ small size power plant, therefore, is revolved using multistage cross flow
Treating capacity can be increased, save absorbent dosage by turning packed bed, after the research in laboratory, be expected to be applied to large size
Thermal power plant.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Fig. 2 is the structure diagram of Cross-Flow Rotating Packed Bed and liquid distribution trough.
Fig. 3 is along the sectional view of line A-A in Fig. 2.
Fig. 4 is along the sectional view of line B-B in Fig. 2.
Fig. 5 is along the sectional view of line C-C in Fig. 2.
In figure：1- air blowers；2- flowmeters；3- Cross-Flow Rotating Packed Beds；4- valves；5- stirs displacement pool；6- oxidation ponds；
7- sedimentation basins；8- clarifying basins；9- circulating pumps；10- mends alkali system；11-pH is counted；12- medicine systems；3.1- frequency modulation motor；3.2-
Shaft；3.3- gas feed；3.4- filler rotors；3.5- collecting tank；3.6- inner cylinder；3.7- supernatant liquid distributors；3.8-
Gas vent；3.9- demisting layer fillers；3.10- liquid-inlet；3.11- diversion pipe；3.12- filler stator；3.13- lower floor's liquid
Distributor；3.14- liquid outlet.
Specific embodiment
It is further illustrated the present invention below by embodiment, but is not limited to following embodiment.
Embodiment：
As shown in Fig. 1 ~ 5, a kind of device of Sodium/Calcium dual alkali scrubbing FGD process, the main equipment of absorption is multistage cross flow rotary filling
Expect bed 3, mainly include revolving bed housing, shaft, filler rotor and filler stator.Wherein, the top of revolving bed housing is equipped with gas
Body outlet 3.8, bottom are equipped with liquid outlet 3.14, and top side is equipped with liquid-inlet 3.10, and lower section side is equipped with gas feed
3.3；The center of revolving bed is equipped with shaft 3.2, and the lower end of shaft is connected with external frequency modulation motor 3.1, and shaft can drive and fill out
Material rotor 3.4 rotates at a high speed, and static filler stator 3.12 is mounted between adjacent filler rotor, with filler rotor interleaved
It sets；Every layer of filler rotor center is equipped with liquid distribution trough, and the present embodiment includes supernatant liquid distributor 3.7 and subnatant
Body distributor 3.13, the supernatant liquid distributor 3.7 are connected with liquid-inlet 3.10.
The air inlet pipe that the gas feed 3.3 connects is equipped with 1 and gas flow meter 2 of air blower.
The inlet tube that the liquid-inlet 3.10 connects is connected with the circulating pump 9 of sodium base lye.
The outlet tube that the liquid outlet 3.14 connects is equipped with valve 4 and is connected with stirring displacement pool 5.
Described 3.8 one end of gas vent is equipped with demisting packing layer 3.9.
The filler of the Cross-Flow Rotating Packed Bed 3 is divided into three layers, is followed successively by filler rotor, filler stator from top to bottom, fills out
Material rotor, interleaved；Every layer of filler is all the packing support component that is made of the stainless steel plate of pillar and uniform pore openings to prop up
Support, and plastics garland or Pall ring filler filling get up to be fixed in rotor using fishing net shaped silk screen.
The liquid distribution trough includes ring sleeve, collecting tank 3.5, diversion pipe 3.11, and ring sleeve is coaxial by two
What casing collectively formed, the outside of shaft 3.2 is placed on as an entirety, if being uniformly provided on the outer tube wall of ring sleeve
Dry hole is filler rotor 3.4 on the outside of casing；Collecting tank 3.5 is circular ring shape, positioned at the bottom outside in upper strata filler rotor,
It is welded with revolving bed inner walls；Diversion pipe 3.11 is for connection to collecting tank 3.5 and lower floor's ring sleeve.Upper strata annular sleeve
After the liquid that pipe sprays is sheared through high-speed rotating filler rotor, it is collected by housing in collecting tank 3.5, along diversion pipe
3.11 it flows into lower floor's ring sleeve.
The ring sleeve is passed through from the center of filler rotor 3.4, and ring sleeve outer wall is uniformly provided with several holes, described
Hole for round hole or grate opening, the quantity in hole depends on fluid flow and flow velocity；In filler stator region, to prevent that gas is short
Road connects by welding between ring sleeve and filler stator.
The collecting tank 3.5 is circular ring shape, and section is by annular sheet, inner cylinder 3.6, revolving bed inner walls group
Into U-lag, collecting tank is located at revolving bed case inside, and annular sheet is perpendicular to inner walls and is welded in inner walls,
For collecting liquid；The inner cylinder be with the body concentric cylinder of shell, inner cylinder bottom is welded as a whole with annular sheet.Liquid
It is collected in collecting tank, is flowed into through diversion pipe in lower floor's ring sleeve.The inner cylinder 3.6 is set parallel to revolving bed shaft
It puts, the height of inner cylinder is determined by fluid flow, and the liquid of collection is no more than the height of inner cylinder.
The diversion pipe 3.11 is round tube, positioned at the lower part of collecting tank 3.5, the liquid distribution trough 3.13 of lower end and bottom
It is connected；Diversion pipe is arranged below collecting tank, is uniformly provided with 3, angle is 120 ° between arbitrary two diversion pipes, along liquid collecting
Slot circumferencial direction is uniformly set towards center of circle direction obliquely, and 3 diversion pipes form pyramidal structure.The diameter of diversion pipe depends on liquid
Body flow, flow control is in 0.01 ~ 1 m/s.
The technological process for being applied to Sodium/Calcium dual alkali scrubbing FGD process using above device is as follows：Contain SO2Air through stream
After the metering of gauge 2, enter from 3 gas feed of Cross-Flow Rotating Packed Bed, by the high-speed rotating filler of lower floor, gas turbulence
Degree increases, and gas spiral rises, and through filler stator, weakens circumferential speed, gas is redistributed, and reenters floor height
The filler of speed rotation, increases flow perturbation, is finally discharged from the gas vent of revolving bed.
After new prepared sodium hydroxide solution benefit alkali system 10 is mixed with the regenerated liquid in regenerated reactor, pass through circulating pump
9 squeeze into the liquid-inlet of revolving bed, and under the huge shear action of upper strata filler, liquid is dispersed into drop, brin, liquid
Film is radially spread from inside to outside, increases gas liquid interfacial area.Afterwards, liquid is gathered by collecting tank collection, along diversion pipe
The liquid distribution trough of lower floor's filler is flowed into, liquid is sheared, adds Surface Renewal rate, enhance gas-liquid mass transfer again.Liquid
Body is flowed out from the liquid outlet of revolving bed, through valve 4, is flowed into after stirring displacement pool 5, with the lime reaction in medicine system,
Into oxidation pond 6, sulfite ion is oxidized to sulfate ion, into sedimentation basin 7, by calcium sulfate therein and a small amount of Asia
After calcium sulfate precipitation, supernatant enters clarifying basin 8, and recycling is mixed with mending the lye in alkali system 10.Through liquid distribution trough
Distributed process it is as follows：Liquid is from the liquid-inlet at rotary packed bed top into being uniformly sprayed at packing layer after rotary packed bed
Inner edge under the centrifugal force effect of high-speed rotating filler rotor, radially throws away, is collected by rotary packed bed outer wall around
It is flowed down along wall, eddy flow enters in collecting tank, under the effect of gravity, enters lower floor's liquid distribution trough along diversion pipe, aggregation is a certain amount of
After liquid, liquid is sprayed to the inner edge of next layer of filler, under the action of the centrifugal force, liquid by the circular hole or grid of liquid distribution trough
Body is subject to huge shearing force, is cut into drop, brin, liquid film, is radially thrown away around through filler, is collected by outer wall
It is discharged afterwards from the liquid outlet of rotary packed bed bottom；Meanwhile gas is filled out from the gas feed entrance of rotary packed bed bottom
Expect in bed, multistage cross flow-counter current contacting is formd between liquid, enhances gas film mass transfer process.
Claims (10)
1. a kind of device of Sodium/Calcium dual alkali scrubbing FGD process, including rotary packed bed, it is characterised in that：It is described rotary packed bed
Rotary packed bed for multistage cross flow, rotary packed bed main body is by housing, shaft and filler stator and can be high-speed rotating
Filler rotor is formed；The top of rotary packed bed housing is equipped with exhaust pipe, and bottom is equipped with drain pipe, top side connection feed liquor
Pipe, lower section side connection air inlet pipe；The lower end of shaft is connected with external frequency modulation motor, two or more are housed in shaft
Filler rotor, static filler stator be mounted on filler rotor between, the two interleaved set；Filler rotor center is equipped with
Liquid distribution trough, the liquid distribution trough are connected with inlet tube, and inlet tube is connected with the storage tank of sodium base lye.
2. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 1, it is characterised in that：It is described rotary packed bed
Filler be divided into three layers or three layers or more, every layer of filler is all the packing support being made of the stainless steel plate of pillar and uniform pore openings
Plastics garland or Pall ring filler filling are got up to be fixed in rotor by component to support using the silk screen of fishing net shaped；
The filler rotor is welded with shaft, filler stator and rotary packed bed case weld.
3. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 1, it is characterised in that：The liquid distribution trough
Including ring sleeve, collecting tank, diversion pipe, ring sleeve is collectively formed by two coaxial sleeves, two coaxial sleeve groups
Integral structure is placed on the outside of shaft, and several holes are uniformly provided on the outer tube wall of ring sleeve, are on the outside of ring sleeve
Filler rotor；Collecting tank is circular ring shape, positioned at the bottom outside of upper strata ring sleeve, is welded with revolving bed inner walls；Liquid collecting
Slot is communicated by diversion pipe with lower floor ring sleeve；The liquid that upper strata ring sleeve sprays is sheared through high-speed rotating filler rotor
Afterwards, flow into collecting tank along housing, flowed into along diversion pipe in lower floor's ring sleeve.
4. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 3, it is characterised in that：The ring sleeve
It is arranged between shaft and filler rotor, the hole of ring sleeve outer wall is round hole or grate opening, and the quantity in hole depends on liquid
Flow and flow rate；In filler stator region, to prevent that gas is short-circuit, between ring sleeve and filler stator by welding
Connection.
5. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 3, it is characterised in that：The collecting tank is
Circular ring shape, positioned at the bottom outside of rotary packed bed case inside, upper strata ring sleeve, section is by annular sheet, inner circle
The U-lag of cylinder, revolving bed inner walls composition, annular sheet is perpendicular to inner walls and is welded in inner walls, for collecting
Liquid；The inner cylinder be with the body concentric cylinder of shell, inner cylinder bottom is welded as a whole with annular sheet.
6. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 3, it is characterised in that：The diversion pipe is
Round tube, upper end are connected with collecting tank, and lower end is connected with next layer of liquid distribution trough；Diversion pipe is arranged under collecting tank
Side, is uniformly provided with 2 ~ 8, is uniformly set obliquely towards center of circle direction along collecting tank circumferencial direction, several diversion pipes form taper
Structure.
7. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 3, it is characterised in that：The collecting tank bottom
The annular sheet in portion is equipped with gear liquid piece with diversion pipe welding top, and convenient for collecting liquid, inner cylinder will be less than by keeping off the height of liquid piece,
The liquid collected is flowed into diversion pipe.
8. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 1, it is characterised in that：In the air inlet pipe
Equipped with air blower and flowmeter；The inlet tube is equipped with valve and flowmeter.
9. the device of Sodium/Calcium dual alkali scrubbing FGD process according to claim 1, it is characterised in that：The air outlet pipe one
End is equipped with demisting packing layer.
10. a kind of method of Sodium/Calcium dual alkali scrubbing FGD process, using claim 1 ~ 9 any one of them Sodium/Calcium Dual alkali cigarette
The device of desulfurization, it is characterised in that：Comprise the following steps：
Air is passed through into air blower and the SO in steel cylinder2Mixing is as simulated flue gas, after being measured through flowmeter, from rotation
The gas feed of bed bottom enters, and under the effect of the pressure, by the high-speed rotating filler of first layer, continues spiral,
In filler stator, it is subject to blocking for static filler stator, weakens the trend of circumferential movement, gas obtains in filler stator
The disturbance of air-flow is also increased while redistribution, the gas of redistribution continues to ascend into upper strata filler rotor, again
It is subject to the shear action of high-speed rotating filler, adds the disturbance of air-flow, increases the phorogenesis between gas and filler,
Air film resistance is reduced, enhances mass transferring in gas phase；
Prepared sodium base lye by centrifugal pump is pressurized, is measured through electromagnetic flowmeter, liquid is from rotary packed bed top
Liquid-inlet is acted on into packing layer inner edge is uniformly sprayed at after rotary packed bed in the centrifugal force of high-speed rotating filler rotor
Under, it radially throws away around, is collected by rotary packed bed outer wall along wall and flowed down, flow into collecting tank, under the effect of gravity, edge
Diversion pipe enters lower floor's liquid distribution trough, after assembling a certain amount of liquid, is sprayed liquid by the circular hole or grid of liquid distribution trough
The inner edge of next layer of filler is sprinkled upon, under the action of the centrifugal force, liquid is subject to huge shearing force, is cut into drop, brin, liquid
Film is radially thrown away around through filler, is discharged after being collected by outer wall from the liquid outlet of rotary packed bed bottom；
Meanwhile the gas feed of gas from rotary packed bed bottom enters in packed bed, and multistage mistake is formd between liquid
Stream-counter current contacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110433759A (en) * | 2019-09-03 | 2019-11-12 | 湖北襄化机械设备有限公司 | A kind of methoxy ethylene synthetic tower |
| CN114682159A (en) * | 2020-12-28 | 2022-07-01 | 北京化工大学 | Liquid self-accelerating multistage hypergravity device and application |
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| CN110433759A (en) * | 2019-09-03 | 2019-11-12 | 湖北襄化机械设备有限公司 | A kind of methoxy ethylene synthetic tower |
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