CN104107632B - Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof - Google Patents
Spouted bed type reactor for semi-dry flue gas desulfurization and multi-stage desulfurization using thereof Download PDFInfo
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- CN104107632B CN104107632B CN201310399163.7A CN201310399163A CN104107632B CN 104107632 B CN104107632 B CN 104107632B CN 201310399163 A CN201310399163 A CN 201310399163A CN 104107632 B CN104107632 B CN 104107632B
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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
- B01D53/505—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound in a spray drying process
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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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/128—Solid reactants
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Abstract
The present invention relates to a spouted bed type reactor for semi-dry flue gas desulfurization and a multistage desulfurization method using the same, more specifically for high temperature air discharge. The purpose of the present invention is to remove sulfur oxide (SOx) included in air exhaust from combustion of flue gas or air exhaust from burning of waste material. Different from a conventional fludized bed reactor, the spouted bed type reactor adopts a method that a calcium hydroxide (Ca(OH)2) alkaline powder absorbent for high temperature and water are injected in an exhaust flowing direction to react and then are removed, so that the staying time is increased and the pressure difference becomes smaller. Then, the powder absorbent, not subjected to reaction, included in the exhaust discharged from removal of the sulfur oxide is collected from a funnel under a filter dust collector and recycled, so that the powder absorbent and the sulfur oxide (SOx) are removed, and thus the removal rate of the sulfur oxide and the use rate of the powder absorbent can reach almost 100%.
Description
Technical field
The present invention relates to it is used for the spouted bed reactor and the Multistage desulfuration method using it of semi-dry fume desulfuration, more
It is related to the spouted bed reactor for high-temperature exhaust air semi-dry fume desulfuration and the Multistage desulfuration method using it body, its
In, in order to remove the oxysulfide in being contained in combustion of fossil fuel exhaust or castoff burning exhaust（SOx）, with existing stream
Fluidized bed reactor is conversely, to the direction injection high temperature calcium hydroxide of exhaust flowing（Ca(OH)2）Alkaline powder absorbent and water
After reacted and removed, to increase the holdup time and so that pressure reduction diminishes, hereafter, heel row will to be removed to oxysulfide
Unreacted powdery absorbent included in the exhaust for going out is recycled after collecting from filter dust collector lower hopper, so as to
Powdery absorbent and oxysulfide can be removed（SOx）, and then enable to the clearance and powdery absorbent of oxysulfide
Utilization rate nearly reaches 100%.
Background technology
Flue gas desulfurization technique starts actively to be carried out centered on the developed countries such as the U.S., Japan, Germany from generation nineteen sixty
Research and development, from the technological development initial stage develop till now the flue gas desulfurization technique of numerous species, but only exist wherein
Economy, reliability aspect have the minority technique of technical advantages just successful in commercialization.
Steam power plant at home, castoff burning technique, the smelting furnace of iron-making and steel-making technique and Acron
（acron）, petrochemicals manufacturing process etc. in the operating part of smoke desulphurization plant of institute there are the following problems：For
Reduction construction cost, in design allowance factor (allowance rate) is reduced, so as to be difficult to tackle abnormal condition, and
Because aging grade reduces desulfuration efficiency.
Currently, the flue gas desulfurization technique for being used in the whole world includes dry type, wet type, 3 kinds of half dry type.
Above-mentioned dry desulfurizing process is that flue gas are passed through into powder or coccoid（pellet）Catalytic Layer method, its
Advantage is compared with wet process, hardly using water, and is removing sulfur dioxide（SO2）Afterwards, gas is not almost discharged
The temperature change of body, so as to without the need for reheating, but have the disadvantage that, reaction speed is slow, therefore expands needs according to conversion zone
Large-scale plant, and sulfur dioxide（SO2）Clearance it is low, reduce economy.
Above-mentioned wet desulfurization methods are the methods cleaned to flue gas using water, aqueous slkali etc. and absorbed, 1 generation
Thing is solution or mud（slurry）Shape, and for sulfur dioxide（SO2）With the mixing of weak precursor reactant agent, therefore react speed
Degree is fast, so as to sulfur dioxide（SO2）Clearance is high, and auxiliary equipment is little, so as to be easy to guarantee to take up an area space, but exists such as
Lower shortcoming：The temperature of the gas discharged in technical process is low, so as to for the climbing power in chimney, need to reheat,
And according to the substantial amounts of waste water of Process Production.
Finally, in above-mentioned half dry type doctor treatment, the injection alkalescence in gas is discharged（NaOH, calcium hydroxide, calcium hydroxide
（Ca(OH)2）Deng）Solution or mud, so that the discharge gas of high temperature is contacted with alkaline matter, so as to by by gas
Interior acidic materials absorb and neutralize the mode for alkaline matter, have the advantage that：The high removal efficiency of sour gas, does not produce
Raw waste water, does not almost corrode and white cigarette phenomenon.
But, have the disadvantage that in half dry type doctor treatment：To the bottom side of device together with exhaust and pulpous state absorbent
It is to sinking therefore low with the contact rate of exhaust and pulpous state absorbent, so as to desulfuration efficiency is as little as from 60% to 70% or so scopes, and
And in order to maintain more than 10 seconds and improve desulfuration efficiency the reaction time, need highly high device；If be flowed into half-dried
The inflow temperature of the exhaust of formula flue gas desulfurization device brings up to more than 160 DEG C, then moisture contained in pulpous state absorbent
Dry rapid generation, so as to shorten the time for producing gas liquid reaction, and then reduces desulfuration efficiency, if the inflow temperature that will be vented
Maintain low temperature, then vapor contained in exhaust can be condensing, and device internal face carry out it is condensing, so as to
Not only increase the fixed amount of fixation reaction solid matter on reaction unit internal face, and cause the corrosion of device；If
Increase fixation reaction solids on the internal face of half dry type desulfurizer, then reduce the inside diameter of device, so as to desulfuration efficiency
Further reduce, and then after the operating of interruption means, it should it is periodically carried out the removal of internal face fixation reaction solids
Operation.
In addition, as the first to file patent of the applicant, having the shortcomings that to be opened to eliminate above-mentioned half dry type doctor treatment
The half dry type fluidized-bed reactor sent out, it is Korean registered patent registration No. the 10-1015154th（Title：Containing oxysulfide
With high-temperature exhaust air powdery absorbent inside and outside circular form sour gas removal device and the sour gas using it of boron compound
Body minimizing technology）.Half dry type fluidized-bed reactor proposed in above-mentioned look-ahead technique has the advantage that：Without using
Liquid phase slurry manufacture device, gypsum shape mud separator, wastewater treatment dress needed for existing wet type fume sweetening device
Put and white cigarette is discharged and prevented with heat exchanger etc., additionally, being completely absent desulfurization produced in semi-dry type flue gas desulfurization device
Efficiency is low, problem because reacting the operation that solid matter is bonded to device internal face and periodically removes fixation reaction thing, this
Outward, by the inner loop in the liquidation and device of powdery absorbent and recycling, the reaction of absorbent is maximized, so as to
Desulfuration efficiency significantly maintains more than 98%, additionally, effectively removing gas boronation contained in exhaust by glass biodissolution
While compound, particle shape boron compound is converted to, is gone so as to be easy to collection in the powdery absorbent cyclone of rear end
Remove.
But, the half dry type fluidized-bed reactor of above-mentioned the applicant there is also some shortcomings, because being arranged at conical stream
The netted and layer material of dynamicization portion entrance, in the case where exhaust includes the high dust of many density, the pressure reduction of inflow part side
Height, so as to hinder fluid to move, and the holdup time in liquidation portion is short, so as to low desulfurization degree can be produced,
Additionally, in order to recycle powdery absorbent, the top in liquidation portion and powdery absorbent are recycled into the upper of whirlwind
Close structure is connected between portion, so as to the pressure reduction in outflow portion side becomes high, and then fluid movement is hindered.
The content of the invention
For solving the above problems it is an object of the invention to provide a kind of spouted bed for semi-dry fume desulfuration
Reactor and the Multistage desulfuration method using it, wherein, removal includes oxysulfide（SOX）Exhaust in the big ash of density
Dirt, improves the exhaust speed flowed into into reactor and the supply mode for reconstituting recycling powdery absorbent, so as to drop
The low pressure reduction in the front and back end of reactor, and then improve and the oxysulfide being included in exhaust（SOX）Be injected into reaction
The haptoreaction rate of the desulfurization powdery absorbent in device, and in inside reactor by oxysulfide（SOX）Absorb with powder
Agent carries out reaction of high order, so as to improve desulfurization degree.
The present invention for realizing above-mentioned purpose and the existing imperfect problem of elimination is performed, by providing half dry type cigarette is used for
Realizing, it includes the spouted bed reactor of desulfurization：Gravity type flow tank, it is settled to being vented the big dust of Midst density
And remove；Venturi portion, it is installed on gravity type sedimentation upper box part, so as to increase the flow velocity of exhaust；Reactor body, it includes
Conical flow portion and liquidation portion, above-mentioned conical flow portion is incorporated into venturi portion top, so as to desulfurization powder
While last absorbent is flowed, oxysulfide is removed, above-mentioned liquidation portion will be from conical flow portion to upper direction
While the water of injection, exhaust and powdery absorbent are circulated flowing, oxysulfide is removed；Powdery absorbent feedway,
Its desulfurization powdery absorbent that will be stored in powdery absorbent storage funnel is supplied to above-mentioned circular cone together with compressed air
Inside shape liquidation portion；Recycling powdery absorbent feedway, unreacted in its exhaust that will be discharged from above-mentioned liquidation portion
Desulfurization powdery absorbent collect from filter dust collector after, resupply together with compressed air to conical flow portion
Portion；Water jet delivery device, it is by being arranged at the nozzle inside above-mentioned conical flow portion to top liquidation portion direction
Compressed air and water are sprayed upwards.
As the presently preferred embodiments, above-mentioned gravitational settling case is arranged at the exhaust of front end and is flowed into the present invention on the basis of case body
Portion is configured to bending with the exhaust outflow portion for being arranged at upper rear end,
In order to adjust the amount of exercise of above-mentioned exhaust and remove the big dust of exhaust Midst density, arrange in case body interior and buffer
Plate, so that supreme portion's outflow portion is discharged afterwards downwards in the exhaust for flowing into,
In order to adjust the speed of above-mentioned exhaust and remove the big dust of exhaust Midst density, inflow part is formed as ingate to case
Body gradually broadens, and outflow portion is formed as from the more remote ingate of case body becoming narrow gradually,
Above-mentioned case body lower part is provided with lower hopper and rotary valve, above-mentioned lower hopper is stored with the ash grit of collection
Son, above-mentioned rotary valve is used for outside discharge.
As the presently preferred embodiments, above-mentioned venturi portion is formed as the present invention, and the circular cylindrical shell of flange is formed with two ends
In inside, more than one unit Venturi tube can be set to be supported in the rondelle supporter of upper and lower sides.
As the presently preferred embodiments, above-mentioned unit Venturi tube is formed as the present invention, and the scope of lower inlet diameter is from upper
Minimum the 1/2 of end outlet diameter is to highest 1/3.
Lower entrances diameter as the presently preferred embodiments, in above-mentioned conical flow portion, can be formed as cylinder by the present invention
The size of the 1/2.5～1/3.0 of shape liquidation portion diameter.
The present invention as the presently preferred embodiments, in above-mentioned conical flow portion, can by from lower entrances diameter to top
The conical inclination angle of part that connects of liquidation portion be formed as 60～70 °.
The present invention as the presently preferred embodiments, the height of above-mentioned reactor body be formed as liquidation portion diameter 5.4～
8.8 size.
As the presently preferred embodiments, above-mentioned powdery absorbent feedway may include the present invention：Nozzle, its insertion is arranged at circle
Cylindrical flow portion；Screw feeder pipe, it supplies powdery absorbent and compressed air to said nozzle；Powdery absorbent is deposited
Storage funnel, its supply screw feeder pipe powder absorbent.
As the presently preferred embodiments, above-mentioned recycling powdery absorbent feedway may include the present invention：Nozzle, its insertion sets
It is placed in cylindrical shape liquidation portion；First screw feeder pipe, it is by the unreacted powdery absorbent reclaimed by filter dust collector
And compressed air is supplied to said nozzle；Recycling powdery absorbent storage funnel, it supplies the powdery absorbent of recycling
To the first screw feeder pipe；Second screw feeder pipe, it will be collected in after the lower hopper of filter dust collector and stores again
Circulation powdery absorbent is supplied to recycling powdery absorbent storage funnel.
As the presently preferred embodiments, the amount of the powdery absorbent of above-mentioned recycling can be filled the present invention according to powdery absorbent supply
The discharge rate put is adjusted.
As the presently preferred embodiments, above-mentioned water jet delivery device may include the present invention：Nozzle, it is arranged at conical flow
Inside change portion, so as to be formed with each stream, to spray water and air to upper direction；Dual supply pipe, it includes that water is supplied
To with inner tube and exterior tube, above-mentioned water supply inner tube supplies water to said nozzle, and said external pipe is to above-mentioned inside
While parcel outside pipe, compressed air is supplied.
As the presently preferred embodiments, the nozzle and circulation powdery absorbent of above-mentioned powdery absorbent feedway are supplied the present invention
The position range of the nozzle of device can be set to the 60～70% of conical flow portion height.
As the presently preferred embodiments, above-mentioned powdery absorbent can use Ca (OH) to the present invention2。
In addition, an alternative embodiment of the invention, utilizes the spouted bed for semi-dry fume desulfuration to react by providing
Realizing, it comprises the steps the Multistage desulfuration method of device：Possesses the spouted bed reaction for above-mentioned semi-dry fume desulfuration
Device, so as to be sunk using the gravitational settling case dust particle big to the density included in the high-temperature exhaust air containing oxysulfide
Drop and remove；
Hereafter, if increasing the flow velocity of exhaust by venturi portion, supply to conical flow after pressure reduction is diminished
Portion, and the high-temperature exhaust air containing powdery absorbent and oxysulfide carries out liquidation while mutually mixing, so as to root
Oxysulfide is once removed according to the increase of haptoreaction rate；
Hereafter, according to water drop it is secondary remove exhaust in oxysulfide, above-mentioned water drop from conical flow portion to
Upper flow portion sprays upwards in direction；
Hereafter, delivery temperature is adjusted according to the temperature adjustment in liquidation portion, and to exhaust and powdery absorbent
While being circulated, three removal oxysulfides；
The present invention as the presently preferred embodiments, it is secondary removal above-mentioned oxysulfide the step of may also include the steps of：Will be from
The unreacted powdery absorbent included in exhaust discharged in liquidation portion is collected from filter dust collector, and to flowing
The powdery absorbent that pressure reduction in the flow export in change portion is collected in the state of diminishing is recycled, so as to remove oxysulfide.
As the presently preferred embodiments, the thermoregulator scope in above-mentioned liquidation portion can maintain 200 DEG C to 400 to the present invention
℃。
According to spouted bed reactor of the invention as above as the useful invention having the advantage that, in industry
On extremely expect the invention that utilizes to it：Without using the liquid phase mud system needed for as existing wet type fume sweetening device
Making device, gypsum phase mud separator, wastewater treatment equipment and flue gas and discharging prevents with heat exchanger etc.,
In addition, for the internal face in spouted bed reactor for fundamentally preventing from being caused by reactive absorption agent and water injection
Reactive absorption agent is fixed with, is constituted to the part connected with liquidation portion to upper direction from conical flow portion inlet diameter
It is 60～70 ° or so to make inclination angle for funnel shaped, and the friendship between upper flow portion and conical flow portion
Venturi portion is set at boundary, and it is anti-to produce strong liquidation according to the strong climbing power for flowing into the exhaust for having powdery absorbent
Should, device internal face is attached to so as to fundamentally cut off reactive absorption agent according to liquidation, therefore without the need for periodically removing
The operation of fixation reaction thing；
In addition, eliminating stepping on as the Korean registered patent for first registering part such as the applicant in spouted bed inside reactor
Floor material as mark 10-1015154 and the composition of its floor supporting substances body is supported, so as to solve because layer material draws
High Pressure Difference and short holdup time between the reactor inside and outside risen；
In addition, the liquidation and the circulation and recycling of spouted bed inside reactor that pass through powdery absorbent, by absorbent
Reaction maximize, so as to maintain substantially high desulfuration efficiency；
In addition, the delivery temperature in the liquidation portion for flowing into spouted bed reactor is maintained into 200 DEG C to 400 DEG C scopes,
So as to fundamentally cut off the corrosion of the spouted bed reactor caused because moisture is condensing；
In addition, during the oxysulfide of the present invention is removed, when the weight of the inlet portion for being arranged at spouted bed reactor is passed through in exhaust
Power flow tank（settling box）While, according to the buffering that the expansion of flow path and the flow direction of diminution and stream are controlled
Plate so that the big dust particle of density included in exhaust is settled to bottom, secondly, will remove the exhaust of dust again by text
Family name's pipe portion is supplied to the conical flow portion for being arranged at spouted bed reactor lower part, so as to according to the strong rising of exhaust liquidation
Liquidation is carried out while power is mutually mixed with powdery absorbent, so as to contained sulphur in powdery absorbent and exhaust
Oxide interface, and then oxysulfide is once removed, and removed in row come secondary according to the water drop sprayed to upper direction
The oxysulfide not removed in gas, and while adjusting delivery temperature so that exhaust and absorbent are in spouted bed reactor
Liquidation is circulated in portion, so as to the oxysulfide not removed for three times, and then almost removes 100% degree；
In addition, the unreacted powdery absorbent included in the exhaust discharged from the spouted bed reactor of the present invention is setting
After being collected in the filter dust collector being placed in the discharge duct of exhaust, it is recycled to again as under spouted bed reactor
The conical flow portion of portion's reacting part, so that in removing for oxysulfide, and then by the powdery absorbent of economy
Utilization rate brings up to almost close 100%.
Description of the drawings
Fig. 1 is the schematic cross-section of the spouted bed reactor for semi-dry fume desulfuration for representing the present invention；
Fig. 2 is to represent gravitational settling case according to an embodiment of the invention（Settling Box）Structure section
Schematic diagram；
Fig. 3 is the schematic diagram for representing venturi portion structure according to an embodiment of the invention；
Fig. 4 is to represent Fluid Mechanics Computation in venturi portion structure according to an embodiment of the invention（CFD,
Computational Fluid Dynamics）Fluid flow direction schematic diagram；
Fig. 5 is the schematic diagram for representing powdery absorbent feedway according to an embodiment of the invention；
Fig. 6 is the schematic diagram for representing recycling powdery absorbent feedway according to an embodiment of the invention；
Fig. 7 is the schematic diagram for representing water jet device according to an embodiment of the invention.
Specific embodiment
Hereinafter, using as the composition of embodiments of the invention and its effect, be described in detail with reference to accompanying drawing, then it is as follows.
In addition in the explanation present invention, related known function is being judged or for illustrating of constituting must obscure this by unnecessary
During the main idea of invention, description is omitted.
Fig. 1 is the schematic cross-section of the spouted bed reactor for semi-dry fume desulfuration for representing the present invention, and Fig. 2 is table
Show gravitational settling case according to an embodiment of the invention（Settling Box）Structure schematic cross-section, Fig. 3 is table
Show the schematic diagram of venturi portion structure according to an embodiment of the invention, Fig. 4 is to represent an enforcement of the invention
Fluid Mechanics Computation in the venturi portion structure of example（CFD,Computational Fluid Dynamics）Fluid flow direction
Schematic diagram, Fig. 5 is the schematic diagram for representing powdery absorbent feedway according to an embodiment of the invention, and Fig. 6 is to represent
The schematic diagram of recycling powdery absorbent feedway according to an embodiment of the invention, Fig. 7 is represented according to the present invention
One embodiment water jet device schematic diagram.
As illustrated, the present invention is generally comprised：Gravity type flow tank 1, its dust big to the exhaust Midst density for flowing into enters
Row sedimentation is simultaneously removed；Venturi portion 2, it is installed on gravity type sedimentation upper box part, so as to increase the flow velocity of exhaust；Reactor body
3, it includes conical flow portion 31 and cylindrical shape liquidation portion 32, and above-mentioned conical flow portion 31 is incorporated into venturi portion
Top, while so as to be flowed with powdery absorbent with desulfurization, removes oxysulfide, and above-mentioned cylindrical shape liquidation portion 32 will
While water, exhaust and the powdery absorbent sprayed from conical flow portion to upper direction is circulated flowing, sulphur removal is gone
Oxide；Powdery absorbent feedway 4, its will be stored in powdery absorbent storage funnel 43 desulfurization powdery absorbent with
Compressed air is supplied to above-mentioned conical flow portion together by nozzle；Recycling powdery absorbent feedway 5, its
Unreacted desulfurization powdery absorbent is collected from filter dust collector 7 in the exhaust that will be discharged from above-mentioned liquidation portion, so as to
Resupplied to conical flow portion by nozzle together with compressed air；Water jet delivery device 6, it passes through to be arranged at
Compressed air and water are sprayed upwards in nozzle 61 inside above-mentioned conical flow portion 31 to the direction of top liquidation portion 32.
According in the spouted bed reactor for semi-dry fume desulfuration of the invention configured as described above, will contain
The burning and gas-exhausting of oxysulfide flows into gravitational settling case 1（Settling Box）Afterwards, by venturi portion 2 while, formed
Strong liquidation.
Now, the powder supplied in funnel 43 will be stored from powdery absorbent by powdery absorbent feedway 4 to absorb
Agent, supplies while carry out liquidation to the conical flow portion 31 for constituting reactor body 3 bottom according to compressed air
Reacted, to remove oxysulfide, afterwards, the cylindrical shape flowing on the top for constituting reactor body 3 is flowed into after rising
Change portion 32.In other words, enter while exhaust is mutually mixed by strong climbing power according to venturi portion with powdery absorbent
Row liquidation, while so as to by being increased with the haptoreaction rate of oxysulfide contained in powdery absorbent and exhaust
It is removed.
Hereafter, in cylindrical shape liquidation portion 32, by being arranged at conical flow portion 31 together with the exhaust for flowing into
Water jet delivery device 6 nozzle 61 to liquidation portion 32 residing for upper direction injection water and carry out liquidation simultaneously, and
And hereafter, the powdery absorbent of rising holdup time while liquidation portion 32 is circulated is elongated, so as to promote burning and gas-exhausting in
Comprising oxysulfide removal reaction, and by be arranged at the upper end in liquidation portion 32 flow export 33 and with this company
The discharge pipe 34 for connecing is supplied to the bottom of filter dust collector 7.
Supply to the exhaust of the removal oxysulfide of the bottom of filter dust collector 7, again containing the ash being contained in exhaust
While the foreign substances of dirt rise, the surface of multiple bag filters 71 is attached to, and removes the exhaust of foreign substances and filtered by pocket type
After the inside of device rises, in being expelled to backend process or air by filter dust collector discharge pipe 72.Now, it is contained in rising
Exhaust in unreacted powdery absorbent declined according to gravity, so as to drop to the lower hopper 73 of filter dust collector after
Piled up, and be configured to recycling powdery absorbent feedway 5 and it is recycled to conical flow portion 31 again
And use.
Hereinafter, each component parts of the present invention is illustrated.
As illustrated, above-mentioned gravitational settling case 1（Settling Box）It is organically to combine gravity dust separator and motion
The device improved after amount seperator is fine if above-mentioned gravity dust separator will be slack-off suddenly containing exhaust velocities such as dusts
Particle drops on ground according to gravity.Its shape is being observed, the direction of inflow part 11 and outflow portion 12 is configured to from water
Square to bending to vertical direction, so as to transform exhaust stream, and when bending from horizontal direction to vertical direction, have a common boundary
Place forms buffer board 13, so as to be vented to the direction of lower hopper 14 move while, reduce amount of exercise, so as to density is big
The particles such as dust drop in lower hopper 14.
In addition, inflow part 11 is formed as, narrow ingate increasingly slopes broadens, so as to outlet side and the hole of case body 15
Size is the same, and outflow portion 12 is formed as, and beginning increasingly slopes narrows equivalent to the width of the hole size of case body, so as to
It is in the same size with the ingate of venturi portion.Thus, the speed of exhaust from inflow part flow into case body when it is slack-off, so as to basis
Gravity drops in lower hopper 14.In addition, after case body, in the structure that outflow portion side is formed as becoming narrow gradually, therefore
When supplying to venturi portion, speed increases again.
In the bottom of funnel 14, rotary valve 16 is set, so as to be expelled to outside after can the particle of collection be opened,
Above-mentioned funnel 14 collects the particles such as the high density dust that settles from the bottom of above-mentioned case body 15.
In being arranged at the venturi portion 2 of the bottom in above-mentioned conical flow portion, at two ends the cylinder cover of flange is formed with
Body 21 is internally provided with unit Venturi tube 22, ties to connect with upper cone shape liquidation portion and bottom gravitational settling case
Close.In addition, in order that exhaust is not while leak to the spatial portion between unit Venturi tube and circular cylindrical shell, by unit Wen
Pipe is supported in forming as one after circular cylindrical shell, and on the upper end and bottom of circular cylindrical shell the circle with hole is respectively provided with
Template supporter 23, above-mentioned hole perforation is consistent with the entrance of unit Venturi tube and outlet.Integral method can there is many ways in which,
But as the presently preferred embodiments, constituted by inserted mode.Exhaust is nearly free from according to above-mentioned combination to spill.Separately
Outward, in the case where needing to replace, by venturi portion 2 it is overall to side to taking-up after, replace with new or place under repair.
In unit Venturi tube, the scope of lower inlet diameter is configured to into minimum the 1/2 of upper end outlet diameter and arrives highest 1/
3.In addition, according to the size of conical flow portion entrance, arranging after can multiple unit Venturi tubes be arranged.Constitute as above
Described venturi portion, so as to be vented through the unit Venturi tube while, with powdery absorbent the same of tempestuously liquidation is carried out
Shi Jinhang mixes, and so as to remove oxysulfide, above-mentioned powdery absorbent diffuses to the flowing of upper cone shape according to rapid flow velocity
Supplied while change portion.
Conical flow portion or liquidation according to the flow direction of the exhaust by the venturi portion with said structure
The liquidation form in portion is according to Fluid Mechanics Computation（CFD,Computational Fluid Dynamics）Showed, then can
As shown in Figure 4.Fig. 4 is that CFD when cone circle corner being formed as into 70 ° according to one embodiment is tested, and is had the effect that：
In the pressure reduction hour applied to spouted bed reactor, liquidation is tempestuously carried out, and the holdup time is elongated.
In above-mentioned conical flow portion 31, the range size of lower entrances diameter is formed as into superposed cylindrical shape
Highest 1/3.0 is arrived in minimum the 1/2.5 of the diameter of liquidation portion 32, and will be from conical flow portion inlet diameter to top side
Conical inclination angle to the part connected with liquidation portion till is formed as 60～70 °.With above-mentioned natural scale and inclination angle
When, the mixing and liquidation effect between burning and gas-exhausting and powdery absorbent is maximum（With reference to Fig. 4）.
The altitude range of the reactor body 3 formed by above-mentioned lower cone shape liquidation portion 31 and liquidation portion 32 is formed
The ratio of highest 8.8 is arrived in for liquidation portion diameter minimum 5.4, inhales to store the powder supplied in funnel 43 from powdery absorbent
Receive agent to be supplied to lower cone shape liquidation portion according to compressed air, so as to when rising after carrying out violent liquidation reaction,
Circulation is fully realized in the inside of liquidation portion 32.When with aforementioned proportion, liquidation is produced well or is circulated.
The insertion in above-mentioned conical flow portion 31 is provided with the nozzle 41 of powdery absorbent feedway 4, recycling
The nozzle 51 of powdery absorbent feedway 5 and the nozzle 61 of water jet delivery device 6, so as to be filled by powdery absorbent supply
Put 4 nozzle 41, the nozzle 51 of recycling powdery absorbent feedway 5 powdery absorbent to be sprayed to bottom direction, and
Spray the water to upper direction, i.e. liquidation direction.
Above-mentioned powdery absorbent feedway 4 includes：Nozzle 41, its insertion is arranged at cylindrical shape liquidation portion 31；Spiral
Feeder pipe 42, it is provided with screw feeder in circle siphunculus, so that powdery absorbent and compressed air are supplied to above-mentioned
Nozzle；Powdery absorbent stores funnel 43, the powder that its hole to a fulcrum by being formed at screw feeder pipe is stored
Last absorbent is supplied；Engine 44, its axle is incorporated into a side of screw feeder, so as to provide revolving force；Compression
Air feeder 45, it supplies compressed air, above-mentioned compressor from compressor or compressed air storage box by open and close valve
Or compressed air storage box supplies compressed air to cylindrical duct from a side of screw feeder pipe.
Above-mentioned recycling powdery absorbent feedway 5 includes：Nozzle 51, its insertion is arranged at cylindrical shape liquidation portion
31；First screw feeder pipe 52, it arranges screw feeder in cylindrical duct, will to pass through what filter dust collector 7 was reclaimed
Unreacted powdery absorbent and compressed air are supplied to said nozzle；Recycling powdery absorbent storage funnel 53, it is to passing through
The powdery absorbent for being formed at the recycling that the hole of a fulcrum of the first screw feeder pipe is stored is supplied；Engine
54, its axle is incorporated into a side of the first screw feeder pipe, so as to provide revolving force；Compressed air feedway 55, its
Compressed air, above-mentioned compressor or compressed air storage box are supplied by open and close valve from compressor or compressed air storage box
Compressed air is supplied to cylindrical duct from a side of the first screw feeder pipe；Second screw feeder pipe 56, its
Screw feeder is provided with cylindrical duct, so that the recycling stored after the lower hopper 73 of filter dust collector 7 will be collected in
Powdery absorbent is supplied to recycling powdery absorbent storage funnel 53；Engine 57, its axle is incorporated into the second screw feeder
One side of pipe, so as to provide revolving force.
Now, the amount of the powdery absorbent of recycling is adjusted according to the discharge rate of above-mentioned powdery absorbent feedway
Section.
Above-mentioned filter dust collector 7 is configured to, and is arranged at the flow export 33 of the upper end in above-mentioned liquidation portion 32 and connects with this
The discharge pipe 34 for connecing is connected to the lower hopper upper side of filter dust collector, so as to exhaust is expelled to into upper side from bottom.Cause
Above-mentioned exhaust flow path, the foreign substances again containing the dust being contained in exhaust are attached to multiple pocket type filters while rising
The surface of device 71, and the exhaust of foreign substances is removed after the inside of bag filter rises, by filter dust collector discharge pipe 72
In being expelled to backend process or air.Now, the unreacted powdery absorbent included in the exhaust of rising is entered according to gravity
Row decline, so as to drop to the lower hopper 73 of filter dust collector after piled up, and recycle powdery absorbent supply dress
Put 5 and again this is recycled to into conical flow portion 31.
Above-mentioned water jet delivery device 6 includes：Nozzle 61, it is arranged inside conical flow portion 31, so as to respectively
Stream is formed with, to spray water and air to upper direction；Dual supply pipe 62, it include water supply inner tube 621 and
Exterior tube 622, and a side is curved to upper direction, and above-mentioned water supply inner tube 621 supplies water to above-mentioned
Nozzle, while said external pipe 622 outside above-mentioned inner tube to wrapping up, supplies compressed air；The water feeders such as pump
63, it supplies water to inner tube；Compressed air feedway 64, it is from compressor or compressed air storage box by opening and closing
Valve supplies compressed air, so that compressed air is supplied to exterior tube.
The nozzle 41 and circulation powder for supplying the powdery absorbent feedway 4 of above-mentioned powdery absorbent and compressed air is inhaled
The position range for receiving the nozzle 51 of agent feeding device 5 is that minimum the 60% of conical flow portion height arrives highest 70%.Arranging
When in above range, the powdery absorbent liquidation that will most preferably produce in conical flow portion space.
In addition, the position of the nozzle 61 of the water jet delivery device 6 of injection compressed air and water and above-mentioned powdery absorbent
Compare positioned at top the position of the nozzle 41 of feedway 4 and the nozzle 51 of circulation powdery absorbent feedway 5.
The injection direction of above-mentioned water injection nozzle 61 is placed up into the reason for portion direction is sprayed is, it is to avoid water is direct
Spray the nozzle 51 of nozzle 41 to the powdery absorbent feedway 4 positioned at bottom and circulation powdery absorbent feedway 5
While condensation afterwards so that liquidation to upper direction is maximized.
The alkaline powder absorbent for being used in the invention described above uses Ca (OH)2.If to using Ca (OH)2An example
Son is observed, then as shown in formulas below, as the SO of oxysulfide2、SO3With Ca (OH)2Reacted, so as to conduct
Reactant generates such as CaSO3、CaSO4It is removed while the same calcium salt.
Ca(OH)2+SO2→CaSO3+H2O
Ca(OH)2+SO3→CaSO4+H2O
In addition, being served only for the high temperature for removing the oxysulfide included in being vented with Ca (OH) in above-mentioned showing2Alkalescence
Powdery absorbent, but can remove other sour gas contained in combustion of fossil fuel exhaust or castoff burning exhaust
Body, in addition, by NaOH, KOH, Na2CO3One use of middle selection is alkaline powder absorbent, so as to can remove from glass-melting furnace
Discharged in boron compound.
In other words, as shown in formulas below, as HCl, HF and Ca (OH) of sour gas2Reacted, so as to
Such as CaCl is generated as reactant2, the same calcium salts of CaF and be removed.
Ca(OH)2+2HCl→CaCl2+2H2O
Ca(OH)2+2HF→CaF2+2H2O
In addition, in order to remove the boron compound discharged from glass-melting furnace（B2O3）, it is powdery absorbent that NaOH is used,
If observed above-mentioned one embodiment, can be as follows, boron compound is reacted with the water of NaOH and injection, and
It is generated as the NaBO for being stable at temperature and particle phase material2After be removed.
Had according to the method for the removal exhaust sulphur oxide of the spouted bed reactor of the present invention as above as follows
Multistage oxysulfide removal step.
First, by above-mentioned gravitational settling case（settling box）Exhaust inflow part is arranged at, so as to aoxidizing containing sulphur
The step of big dust particle of density included in the high-temperature exhaust air of thing is settled and removed；
Hereafter, while the exhaust for removing the big dust particle of density being increased into flow velocity by venturi portion, pressure reduction is become
It is little, and supply to conical flow portion, so as to the high-temperature exhaust air containing powdery absorbent and oxysulfide is mutually mixed
The step of carrying out liquidation while conjunction, and then oxysulfide once removed according to the increase of haptoreaction rate；
Hereafter, according to water drop it is secondary remove exhaust in oxysulfide the step of, above-mentioned drop is from conical flow
Spray upwards in portion to top liquidation portion direction.
Hereafter, according to the temperature adjustment in liquidation portion, delivery temperature is adjusted and exhaust and powdery absorbent is entered
Row circulation while, three times remove oxysulfide the step of.
The step of above-mentioned secondary removal oxysulfide, comprises the steps：By from included in the exhaust that liquidation portion discharges
Unreacted powdery absorbent collect from filter dust collector, and in the shape that the pressure reduction in the flow export in liquidation portion diminishes
Under state, the powdery absorbent to collecting is recycled, so as to remove oxysulfide.
In above-mentioned, the temperature regulating range in liquidation portion is maintained into 200 DEG C to 400 DEG C, so as to prevent moisture condensing
While be circulated.Preferably, at Ca (OH)2Temperature be 350 DEG C when, produce maximal efficiency.Temperature is brought up to into setting
After the degree of region, in bag filter or SCR parts NO is easily achievedXRemove.
It is not only bad to produce circulation if moisture is condensing, and spouted bed reactor can be corroded.
The present invention is not limited to above-mentioned specific preferred embodiment, and without departing from the present invention asked in request scope
Main idea, the present invention belonging to technical field in have general knowledge any technical staff can all carry out various modifications enforcement,
Change as described above should be included in the scope described in request scope.
Label declaration
1：Gravity type flow tank 2：Venturi portion
3：Reactor body 4：Powdery absorbent feedway
5:Recycling powdery absorbent feedway 6：Water jet delivery device
7:Filter dust collector 11：Inflow part
12:Outflow portion 13：Buffer board
14:Lower hopper 15：Case body
16:Rotary valve 21：Circular cylindrical shell
22:Unit Venturi tube 23：Rondelle supporter
31:Conical flow portion 32：Liquidation portion
33:Flow export 34：Discharge pipe
41:Nozzle 42：Screw feeder pipe
43:Powdery absorbent stores funnel 44：Engine
45:Compressed air feedway 51：Nozzle
52:First screw feeder pipe 53：Recycling powdery absorbent storage funnel
54:Engine 55：Compressed air feedway
56:Second screw feeder pipe 57：Engine
61:Nozzle 62：Dual supply pipe
63:Water feeder 64：Compressed air feedway
71：Bag filter 72：Filter dust collector discharge pipe
73:Lower hopper 621：Inner tube
622：Exterior tube
Claims (11)
1. a kind of spouted bed reactor for semi-dry fume desulfuration, it is characterised in that include：
Gravity type flow tank, it is settled and is removed to being vented the big dust of Midst density；
Venturi portion, it is installed on gravity type sedimentation upper box part, so as to increase the flow velocity of exhaust；
Reactor body, it includes conical flow portion and liquidation portion, and above-mentioned conical flow portion is incorporated into Venturi tube
Portion top, while so as to be flowed with powdery absorbent with desulfurization, removes oxysulfide, and above-mentioned liquidation portion will be from circular cone
While water, exhaust and the powdery absorbent that shape liquidation portion sprays to upper direction is circulated flowing, oxysulfide is removed；
Powdery absorbent feedway, it will be stored in the desulfurization powdery absorbent in powdery absorbent storage funnel and compression
Air is arranged at together the nozzle in above-mentioned conical flow portion by insertion and is sprayed so as to supply to above-mentioned circle towards bottom direction
Inside conical flow portion；
Recycling powdery absorbent feedway, unreacted desulfurization powder in its exhaust that will be discharged from above-mentioned liquidation portion
After absorbent is collected from filter dust collector, the spray in above-mentioned conical flow portion is arranged at by insertion together with compressed air
Mouth is sprayed so as to resupply to conical flow portion towards bottom direction；
Water jet delivery device, it is by being arranged at the nozzle inside above-mentioned conical flow portion to top liquidation portion direction
Compressed air and water are sprayed upwards,
The position of the nozzle of the above-mentioned water jet delivery device of injection compressed air and water, with above-mentioned powdery absorbent feedway
Nozzle and the position of nozzle of recycling powdery absorbent feedway compare positioned at top；
Above-mentioned venturi portion is formed as, and is formed with the inside of the circular cylindrical shell of flange at two ends, more than one unit Wen
Pipe can be set to be supported in the rondelle supporter of upper and lower sides；
Above-mentioned unit venturi shaped becomes, and the scope of lower inlet diameter is from minimum the 1/2 of upper end outlet diameter to highest 1/
3；
In above-mentioned conical flow portion, lower entrances diameter is formed as into the 1/2.5～1/3.0 of cylindrical shape liquidation portion diameter
Size；The conical inclination angle of the part connected to the liquidation portion with top from lower entrances diameter is formed as into 60～70 °；
The height of the reactor body is formed as 5.4～8.8 sizes of liquidation portion diameter.
2. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that：
Above-mentioned gravitational settling case is arranged at the exhaust inflow part of front end on the basis of case body and is arranged at the exhaust of upper rear end
Outflow portion is configured to bending,
And in order to adjust the amount of exercise of above-mentioned exhaust and remove the big dust of exhaust Midst density, arrange in case body interior and buffer
Plate, so that supreme portion's outflow portion is discharged afterwards downwards in the exhaust for flowing into,
In order to adjust the speed of above-mentioned exhaust and remove the big dust of exhaust Midst density, inflow part is formed as ingate to case body
Gradually broaden, and outflow portion is formed as from the more remote ingate of case body becoming narrow gradually,
Above-mentioned case body lower part is provided with lower hopper and rotary valve, above-mentioned lower hopper is stored with the dust particle of collection,
Above-mentioned rotary valve is used for outside discharge.
3. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that above-mentioned powder
Absorbing agent feeding device includes：
Nozzle, its insertion is arranged at cylindrical shape liquidation portion；
Screw feeder pipe, it supplies powdery absorbent and compressed air to said nozzle；
Powdery absorbent stores funnel, its supply screw feeder pipe powder absorbent.
4. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that above-mentioned to follow again
Ring powdery absorbent feedway includes：
Nozzle, its insertion is arranged at cylindrical shape liquidation portion；
First screw feeder pipe, its by the unreacted powdery absorbent reclaimed by filter dust collector and compressed air supply to
Said nozzle；
Recycling powdery absorbent storage funnel, it supplies the powdery absorbent of recycling to the first screw feeder pipe；
Second screw feeder pipe, it will be collected in the recycling powdery absorbent supply stored after filter dust collector lower hopper
To recycling powdery absorbent storage funnel.
5. the spouted bed reactor for semi-dry fume desulfuration according to claim 4, it is characterised in that：
The amount of the powdery absorbent of above-mentioned recycling is adjusted according to the discharge rate of powdery absorbent feedway.
6. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that above-mentioned water spray
Penetrating feedway includes：
Nozzle, it is arranged inside conical flow portion, so as to be formed with each stream, so as to upper direction injection water and
Air；
Dual supply pipe, it includes water supply inner tube and exterior tube, and above-mentioned water supply inner tube supplies water to above-mentioned
Nozzle, while said external pipe outside above-mentioned inner tube to wrapping up, supplies compressed air.
7. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that：
The position range of the nozzle of above-mentioned powdery absorbent feedway and the nozzle of circulation powdery absorbent feedway can set
It is set to the 60～70% of conical flow portion height.
8. the spouted bed reactor for semi-dry fume desulfuration according to claim 1, it is characterised in that：
Above-mentioned powdery absorbent uses Ca (OH)2。
9. it is a kind of utilize for semi-dry fume desulfuration spouted bed reactor Multistage desulfuration method, it is characterised in that include
Following steps：
Possess the spouted bed reactor for above-mentioned semi-dry fume desulfuration according to any one in claim 1 to 8, so as to
Settled and gone using the gravitational settling case dust particle big to the density included in the high-temperature exhaust air containing oxysulfide
Remove；
Hereafter, if increasing the flow velocity of exhaust by venturi portion, supply after pressure reduction is diminished to conical flow portion, and
And the high-temperature exhaust air containing powdery absorbent and oxysulfide carries out liquidation while mutually mixing, so as to according to contact
The increase of reactivity once removes oxysulfide；
Hereafter, according to the secondary oxysulfide removed in exhaust of water drop, above-mentioned water drop is from conical flow portion to top
Liquidation portion sprays upwards in direction；
Hereafter, delivery temperature is adjusted according to the temperature adjustment in liquidation portion, and exhaust and powdery absorbent is carried out
While circulation, three removal oxysulfides.
10. it is according to claim 9 utilize for semi-dry fume desulfuration spouted bed reactor Multistage desulfuration method,
Characterized in that, the step of secondary removal above-mentioned oxysulfide may also include the steps of：
The unreacted powdery absorbent included in exhaust that will be discharged from liquidation portion is collected from filter dust collector, and
The powdery absorbent collected in the state of to the pressure reduction in the flow export in liquidation portion is diminished is recycled, so as to go sulphur removal
Oxide.
11. it is according to claim 9 utilize for semi-dry fume desulfuration spouted bed reactor Multistage desulfuration method,
It is characterized in that：
The thermoregulator scope in above-mentioned liquidation portion can maintain 200 DEG C to 400 DEG C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130043083A KR101340389B1 (en) | 2013-04-18 | 2013-04-18 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi- stage desulfurization method using thereof |
| KR10-2013-0043083 | 2013-04-18 |
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| Publication Number | Publication Date |
|---|---|
| CN104107632A CN104107632A (en) | 2014-10-22 |
| CN104107632B true CN104107632B (en) | 2017-04-12 |
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| CN105363337A (en) * | 2015-10-27 | 2016-03-02 | 宁波众茂姚北热电有限公司 | Waste incineration flue gas purifying system |
| CN105413437A (en) * | 2015-12-25 | 2016-03-23 | 北京建筑材料科学研究总院有限公司 | Flue gas desulfurization system for cement kiln |
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