CN208757295U - A kind of device of flue gas desulfurization - Google Patents
A kind of device of flue gas desulfurization Download PDFInfo
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- CN208757295U CN208757295U CN201821093508.0U CN201821093508U CN208757295U CN 208757295 U CN208757295 U CN 208757295U CN 201821093508 U CN201821093508 U CN 201821093508U CN 208757295 U CN208757295 U CN 208757295U
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Abstract
The utility model provides a kind of device of flue gas desulfurization, comprising: absorption tower tower body；Absorption tower tower body lower part is equipped with smoke inlet, and top is equipped with exhanst gas outlet；Serum recycle device, liquid column-spraying device, high-efficient atomizing spray equipment and the demister being successively set on inside the absorbing tower body from bottom to top；The liquid column-spraying device is arranged above the smoke inlet；The liquid column-spraying device includes several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes one or more horizontal beddings inside the absorbing tower body are uniformly distributed；Each liquid column-spraying branch pipe bottom end is communicated with the serum recycle device, and top is equipped with liquid column-spraying spray head；The inlet flue duct communicated with the smoke inlet；The flue gases duct communicated with the exhanst gas outlet.The device of flue gas desulfurization provided by the utility model can be realized the coordinated desulfurization effect of liquid column-spraying and high-efficient atomizing spray, have the advantages that desulfuration efficiency is high, desulfurization effect is good and energy-saving consumption-reducing.
Description
Technical field
The utility model relates to flue gas desulfurization technique fields, are to be related to a kind of device of flue gas desulfurization more specifically.
Background technique
As Environmental protection is increasingly paid attention to, to the emission request of the pollutant of the industries such as thermoelectricity, coking, chemical industry
It is increasingly stringenter.Currently, mainly having dry desulfurization, semi-dry desulphurization and wet desulphurization etc. in flue gas desulfurization and denitrification industry
Three kinds of desulfurization methods；Wherein, the wet desulphurization applied in Thermal Power Generation Industry in the world accounts for the above sulfur method application unit
80%；And lime stone-gypsum accounts for 85% or more in wet desulphurization.Because of the atmosphere pollution discharge capacity of thermoelectricity, coking industry
The higher ratio that occupies is put, and lime stone-gypsum desulfurization is also very extensive in industrial application, therefore to its technique
Optimization design, energy-saving and emission-reduction have great importance for entire environmental protection industry (epi).
Currently, the application and research to Wet Flue Gas Desulfurization Technique are all than wide.In Publication No. CN101564641A
State's patent discloses a kind of liquid column tower of sprinkling optimization, adjusts desulfurization spraying cleaning solution its main feature is that can be arranged inside spray tube
Homogenizing plate, to guarantee that slurries spray height having the same；Although this design helps to ensure that injection nozzle in slurries
There is close or even identical pressure, but in practical implementation, the angle between homogenizing plate and slurry pipe is difficult in pipe
It determines, it is difficult to reach expected desulfuration efficiency, to limit further applying for the technical solution.And Publication No.
The Chinese patent of CN104084016A discloses a kind of two-step desulfurization liquid column tower, the utility model by desulfurizer be divided into 3 every
From room, the first Room is atomizing spray desulfurization, and second Room is liquid column-spraying desulfurization, and third room is demister part；Though this design
So desulfuration efficiency is improved to a certain extent, but absorption tower the space occupied is larger, the flue gas for being not suitable for big exhaust gas volumn is de-
Sulphur.In addition, the Chinese patent of Publication No. CN202983508U discloses a kind of multistage multiple dimensioned injection apparatus of liquid column tower, work
Skill feature is the injection nozzle that different model, height are arranged in absorption tower, and multilayer, drop radial sector are sequentially formed in tower body space
The drop dense layer of increase forms multiple liquid curtain layers on different height in this way, and the liquid-drop diameter of lower layer is small,
Successively increase upwards, realizes quasi-continuous, multiple dimensioned multistage mass transport process；But the technology is improved to desulfuration efficiency and energy-saving consumption-reducing
Positive effect it is little.
In conclusion technical solution disclosed in the prior art be the exclusive use to spray scrubber and liquid column tower mostly with
And the two is separately optimized in technique, it still remains spray scrubber high energy consumption and liquid column tower desulfurization is halfway asks
Topic；Although individual technical solutions have carried out slurries injection and slurry spraying spray, but be answering in two different systems
With generation does not act synergistically, and the absorption tower volume needed is larger, to the more demanding of place.
Utility model content
In view of this, having desulfuration efficiency high, de- the purpose of this utility model is to provide a kind of device of flue gas desulfurization
The advantages of sulphur effect is good and energy-saving consumption-reducing, and occupied space is smaller, is suitble to the flue gas desulfurization of high density pollution object and big flow.
The utility model provides a kind of device of flue gas desulfurization, comprising:
Absorption tower tower body；Absorption tower tower body lower part is equipped with smoke inlet, and top is equipped with exhanst gas outlet；
It is successively set on serum recycle device inside the absorbing tower body, liquid column-spraying device, efficiently from bottom to top
Atomizing sprayer and demister；The liquid column-spraying device is arranged above the smoke inlet；The liquid column-spraying dress
It sets including several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes are one or more inside the absorbing tower body
Horizontal bedding is uniformly distributed；Each liquid column-spraying branch pipe bottom end is communicated with the serum recycle device, and top is equipped with fluid column
Spray spray head；
The inlet flue duct communicated with the smoke inlet；
The flue gases duct communicated with the exhanst gas outlet.
Preferably, the serum recycle device includes:
The stock tank of absorption tower tower body bottom is set；Slurry circulating pump is equipped in the stock tank；
The reducer pipe communicated with each liquid column-spraying branch pipe；The diameter of the reducer pipe subtracts along slurries flow direction
It is small；
It is connected to the slurries pipeline of the slurry circulating pump and reducer pipe.
Preferably, several described liquid column-spraying branch pipes two horizontal beddings inside the absorbing tower body uniformly divide
Cloth；The spacing distance of described two horizontal beddings is 0.8m~2m；2/m is arranged in each horizontal bedding2~4/m2Fluid column spray
Penetrate branch pipe.
Preferably, the high-efficient atomizing spray equipment includes:
Atomizing spray main pipe；
Several high-efficient atomizing spray heads around the atomizing spray main pipe are set；
The slurries spray pump communicated with the atomizing spray main pipe.
Preferably, the high-efficient atomizing spray head is atomization solid-cone spray head or atomization hollow cone spray head.
Preferably, the underface of the high-efficient atomizing spray equipment is arranged in the liquid column-spraying device；The fluid column spray
The spacing distance of injection device and the high-efficient atomizing spray equipment is 3m~7m.
Preferably, the underface of the demister is arranged in the high-efficient atomizing spray equipment；The high-efficient atomizing spray
The spacing distance of shower device and the demister is 1.5m~3m.
Preferably, further includes:
The import flue gas inspection point of the inlet flue duct is set；
The exiting flue gas test point of the flue gases duct is set；
The control room being connected respectively with the import flue gas inspection point and exiting flue gas test point.
The utility model provides a kind of device of flue gas desulfurization, comprising: absorption tower tower body；Absorption tower tower body lower part
Equipped with smoke inlet, top is equipped with exhanst gas outlet；The serum recycle being successively set on inside the absorbing tower body from bottom to top
Device, liquid column-spraying device, high-efficient atomizing spray equipment and demister；The liquid column-spraying device setting enters in the flue gas
Above mouthful；The liquid column-spraying device includes several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes are along the suction
One or more horizontal beddings inside tower tower body are received to be uniformly distributed；Each liquid column-spraying branch pipe bottom end and the serum recycle
Device communicates, and top is equipped with liquid column-spraying spray head；The inlet flue duct communicated with the smoke inlet；It is communicated with the exhanst gas outlet
Flue gases duct.Compared with prior art, the device of flue gas desulfurization provided by the utility model is closed using specific structure and connection
System can be realized the coordinated desulfurization effect of liquid column-spraying and high-efficient atomizing spray, have desulfuration efficiency height, desulfurization effect good and section
The advantages of consumption can be subtracted, and occupied space is smaller, is suitble to the flue gas desulfurization of high density pollution object and big flow.
In addition, device provided by the utility model can monitor each side's face data of flue gas in real time, and according to exhaust gas volumn,
SO2The data such as concentration carry out speed regulating control to slurry circulating pump and slurries spray pump, to reduce desulfurization island energy consumption, reach energy conservation
The effect of emission reduction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of flue gas desulfurization provided by the embodiment of the utility model；
Fig. 2 is that the device of flue gas desulfurization provided by the embodiment of the utility model realizes liquid column-spraying and high-efficient atomizing spray
The schematic diagram of coordinated desulfurization effect.
Specific embodiment
Below in conjunction with the utility model embodiment, the technical solution of the utility model is clearly and completely described,
Obviously, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.It is practical based on this
Embodiment in novel, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, is fallen within the protection scope of the utility model.
The utility model provides a kind of device of flue gas desulfurization, comprising:
Absorption tower tower body；Absorption tower tower body lower part is equipped with smoke inlet, and top is equipped with exhanst gas outlet；
It is successively set on serum recycle device inside the absorbing tower body, liquid column-spraying device, efficiently from bottom to top
Atomizing sprayer and demister；The liquid column-spraying device is arranged above the smoke inlet；The liquid column-spraying dress
It sets including several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes are one or more inside the absorbing tower body
Horizontal bedding is uniformly distributed；Each liquid column-spraying branch pipe bottom end is communicated with the serum recycle device, and top is equipped with fluid column
Spray spray head；
The inlet flue duct communicated with the smoke inlet；
The flue gases duct communicated with the exhanst gas outlet.
In the present invention, the device of the flue gas desulfurization includes absorption tower tower body, serum recycle device, liquid column-spraying
Device, high-efficient atomizing spray equipment, demister, inlet flue duct and flue gases duct.Referring to Fig. 1, Fig. 1 is that the utility model is real
The structural schematic diagram of the device of the flue gas desulfurization of example offer is provided.Wherein, 1 is absorption tower tower body, and 2 be smoke inlet, and 3 be flue gas
Outlet, 4 be serum recycle device, and 5 be liquid column-spraying device, and 6 be high-efficient atomizing spray equipment, and 7 be demister, and 8 be fluid column
Branch pipe is sprayed, 9 be liquid column-spraying spray head, and 10 be inlet flue duct, and 11 be flue gases duct, and 12 be stock tank, and 13 be slurry circulating pump, 14
It is slurries pipeline for reducer pipe, 15,16 be atomizing spray main pipe, and 17 be high-efficient atomizing spray head, and 18 be import flue gas inspection point,
19 be exiting flue gas test point, and 20 be control room.
In the present invention, the absorption tower tower body is preferably used for flue gas desulfurization using well known to those skilled in the art
Absorption tower tower body, it is not specifically limited to this for the utility model.In the present invention, under the absorption tower tower body
Portion is equipped with smoke inlet, thus flue gas to be processed enters inside absorbing tower body；Flue gas is equipped at the top of the absorption tower tower body
Thus outlet, the neat stress after desulfurization are discharged inside absorbing tower body.
In the present invention, the inlet flue duct is communicated with the smoke inlet, for conveying flue gas to be processed
To absorbing tower body；The flue gases duct is communicated with exhanst gas outlet, for absorbing tower to be discharged in the neat stress after desulfurization
Internal portion.
In the present invention, serum recycle device, fluid column spray are set gradually inside the absorbing tower body from bottom to top
Injection device, high-efficient atomizing spray equipment and demister；Wherein, the liquid column-spraying device is arranged on the smoke inlet
Side.
In the present invention, the liquid column-spraying device includes several liquid column-spraying branch pipes, for spraying slurries shape
At fluid column；Each liquid column-spraying branch pipe bottom end is communicated with the serum recycle device, and top is equipped with liquid column-spraying spray head.?
In the utility model, several described liquid column-spraying branch pipes one or more horizontal beddings inside the absorbing tower body are uniform
Distribution；In the case, slurries are sprayed simultaneously by several described liquid column-spraying branch pipes, can be in one or more level courses
Face forms liquid column-spraying layer.In the utility model preferred embodiment, several described liquid column-spraying branch pipes are along the absorption
Two horizontal beddings are uniformly distributed inside tower tower body, so that liquid column-spraying layer is formed in two horizontal beddings, by described in control
The spacing distance of two horizontal beddings can obtain the double-deck intersection liquid column-spraying layer, to avoid being formed in the tower body of absorption tower
The channel of flue gas increases flue gas in the turbulence level of jetted layers.In the present invention, the spacing distance of described two horizontal beddings
Preferably 0.8m~2m, more preferably 1.5m~2m.In the present invention, each horizontal bedding is preferably provided with 2/m2~4
A/m2Liquid column-spraying branch pipe.
In the present invention, the slurry flow of the liquid column-spraying device is big, and flow velocity is very fast, is capable of forming highdensity
Liquid column-spraying layer；Spraying flow velocity is preferably 5m/s~14m/s, and single layer liquid-gas ratio is preferably 13L/m3~25L/m3, much larger than existing
There is the spray column single layer 5L/m in technology3~8L/m3Liquid-gas ratio.
In the present invention, the injection direction of the liquid column-spraying spray head is that vertical above-mentioned horizontal bedding is upward；This reality
With the liquid column-spraying spray head of novel use according to flue gas operating condition type selecting, using unified constant aperture；During desulfurization operation, according to
Project operation load, exhaust gas volumn, SO2Inlet concentration, SO2Exit concentration etc. controls slurries injection flow, and then it is high to control injection
Degree.In the present invention, the aperture of the liquid column-spraying spray head is preferably 15mm~45mm, more preferably 25mm~45m；Stream
Depending on slurries operating pressure, the slurries operating pressure is preferably 0.2kg~1.6kg, jetting height for amount and jetting height
Preferably 0.8m~6m, more preferably 0.8m~5m.
In the present invention, the liquid column-spraying device is arranged above the smoke inlet, flue gas to be processed from
The smoke inlet enters, while liquid column-spraying device sprays slurries fluid column upwards, and flue gas can be had by spraying upward slurries
Certain ejector action reduces tower pressure drop, while fluid column rises to highest point meeting nature and scatters, and declines under the effect of gravity；
Slurries have desulfurization twice in whole process: being once that slurries injection direction contacts absorption SO with flue gas in the same direction2, it is slurries for the second time
It reaches highest point diverging to fall, is inversely contacted with flue gas and absorb SO2, improve slurries utilization rate；Also, second of desulfuration efficiency is high
In first time desulfurization.In addition, liquid column-spraying during slurries spray and decline upwards, is mutually collided between drop, be will form
A large amount of new drops, at the same it is fused etc. there are also drop, new gas-liquid contact face can be constantly generated, gas-liquid mass transfer efficiency is improved.
In the present invention, the serum recycle device includes stock tank, reducer pipe and slurries pipeline；Wherein, the slurry
Pond is arranged in absorption tower tower body bottom, for recycling slurries；The reducer pipe is communicated with each liquid column-spraying branch pipe,
For slurries to be delivered to the liquid column-spraying branch pipe；The slurries pipeline is connected to the slurry circulating pump and reducer pipe, is used for
Convey slurries.
In the present invention, slurry circulating pump is equipped in the stock tank, for providing conveying and injection power for slurries.
In the present invention, the slurry circulating pump is preferably speed governing type slurries pump, thus during desulfurization operation, according to project
Operating load, exhaust gas volumn, SO2Inlet concentration, SO2Exit concentration etc. controls slurries injection flow, and then controls jetting height.
In the present invention, the diameter of the reducer pipe preferably reduces along slurries flow direction, so that slurries be made to become
The flow of diameter pipe constantly reduces with slurries flow direction, guarantees to manage interior slurry flow rate identity, have in unit slurries identical
Kinetic energy, guarantee that slurries are injected in a height in tower, avoid in tower liquid column-spraying height irregular (if keeping main pipe pipe
Diameter is constant, main pipe end slurries minimum of kinetic energy, and on absorption tower, jetting height can be gradually decreased with main pipe slurry direction), it influences to take off
Sulphur effect.
In the present invention, the high-efficient atomizing spray equipment includes atomizing spray main pipe, the spray of several high-efficient atomizings
Head and slurries spray pump.In the present invention, several described high-efficient atomizing spray head settings are in the atomizing spray main pipe week
It encloses；The atomizing spray main pipe forms given zone for conveying slurries, and by distribution of the control main pipe in the tower body of absorption tower
The atomizing spray layer in domain；In the utility model preferred embodiment, the atomizing spray main pipe is horizontal in the tower body of absorption tower
Two layers of distribution.In the present invention, the slurries spray pump is communicated with the atomizing spray main pipe, defeated for providing for slurries
Send and spray power.
In the present invention, the underface of the high-efficient atomizing spray equipment is arranged in the liquid column-spraying device.This
Spacing distance of the utility model by both control, the liquid column-spraying layer and the efficient mist for forming the liquid column-spraying device
Change the atomizing spray layer that spray equipment is formed and realize synergistic effect, the schematic diagram is shown in Figure 2.Atomization in atomizing spray layer
Drop passes through liquid film theoretical absorption SO2Afterwards, into liquid column-spraying layer；The slurries of atomizing spray can increase the turbulent flow of liquid column-spraying layer
Degree, and drop, fluid column that the drop fallen of top rises with lower part are blended, collided, the more fresh drops of generation；Together
When, when the slurries of liquid column-spraying reach maximum height, it is in interim stationary state, atomized drop has centainly at this time
Kinetic energy, more drops can be generated by hitting topmost fluid column, drop etc..According to liquid film renewal theory, drop absorption SO2's
Surface can form fresh absorbing film, and then can show good SO again because of the collision of top drop2Assimilation effect,
Improve the liquid film contacting efficiency in the region.In the present invention, the liquid column-spraying device and high-efficient atomizing spray fill
The spacing distance set is preferably 3m~7m, more preferably 5m~7m.The height control that the utility model passes through adjusting liquid column-spraying layer
The collision effect of drop between atomizing spray and liquid column-spraying processed.
In the present invention, the high-efficient atomizing spray head is preferably atomized solid-cone spray head or atomization hollow cone spray head,
More preferably it is atomized solid-cone spray head.The utility model has good atomizing effect using above-mentioned high-efficient atomizing spray head；According to
Boundary-layer theory, same liquid-gas ratio have better gas-liquid mass transfer effect compared with the slurries of other forms spray.Currently,
National SO2The standard of minimum discharge is 35mg/Nm3, only rely on liquid column-spraying and be difficult to reach desulfurization effect；If only relying on atomization
Spray, then it is higher to the pressure head and lift demand of circulating pump because slurry spraying back pressure is excessively high, cause spray energy consumption higher.This
Utility model sprays coordinated desulfurization using liquid column-spraying and slurry spraying, utilizes liquid column-spraying high gas-liquid ratio, low energy consumption, by big portion
The SO divided2Removing；But liquid column-spraying is difficult to ensure desulfuration efficiency or guarantees that the energy consumption of desulfuration efficiency is higher at this time, at this time then
High-efficient atomizing spray be can use by the SO in flue gas2It is removed to discharge standard 35mg/Nm3Below.
In the present invention, the demister is preferably demister, for removing the saturation drop in flue gas.At this
In utility model, the underface of the demister is arranged in the high-efficient atomizing spray equipment；The high-efficient atomizing spray dress
Setting with the spacing distance of the demister is preferably 1.5m~3m, more preferably 1.8m~2.4m.
In the present invention, it is also preferable to include import flue gas inspection point, exiting flue gas to examine for the device of the flue gas desulfurization
Measuring point and control room.In the present invention, the import flue gas inspection point is arranged in the inlet flue duct；The exiting flue gas
Test point is arranged in the flue gases duct；The control room distribution and the import flue gas inspection point and exiting flue gas test point phase
Even.
In the present invention, the import flue gas inspection point and exiting flue gas test point are all made of those skilled in the art
Well known CEMS measuring point, for detecting flue-gas temperature, SO2The data such as concentration, pressure；Above-mentioned data can be transmitted to control room,
Monitor the SO in flue gas in real time2Concentration levels, and automatic control mode can be used by adjusting slurry circulating pump and slurries spray
Revolution speed exports pollutant concentration specific value to control.In addition, the SO in flue gas2Concentration is mainly related with power plant coal quality, electricity
Coal quality is all more stable within the scope of the coal that factory is burnt general 1-5 days；The staff of control room can pass through man-machine interface
The concentration for observing gas inlet and outlet, according to operating condition select investment liquid column-spraying or atomizing spray or liquid column-spraying with
Atomizing spray is put into simultaneously；And the investment of liquid column-spraying can be achieved speed governing operation and adjust serum recycle amount, realize energy saving purpose.
The device of flue gas desulfurization provided by the utility model uses specific structure and connection relationship, can be realized liquid column-spraying
With the coordinated desulfurization effect of high-efficient atomizing spray, have the advantages that desulfuration efficiency is high, desulfurization effect is good and energy-saving consumption-reducing, and accounts for
It is smaller with space, it is suitble to the flue gas desulfurization of high density pollution object and big flow.According to field engineering experience, the utility model is provided
Flue gas desulfurization device can be used alone spray scrubber same efficiency under, reduce by 15%~35% energy consumption；Relatively
It can be improved 10%~15% desulfuration efficiency in the fluid column formula injection of exclusive use.
The utility model additionally provides a kind of method of flue gas desulfurization, comprising the following steps:
A) device by adopting the above technical scheme, successively carries out liquid column-spraying desulfurization, turbulent flow for flue gas to be processed
Drop contact desulfurization and high-efficient atomizing spray desulfurization, then remove the drop in flue gas, obtain neat stress.
In the present invention, the flue gas to be processed is preferably thermoelectricity well known to those skilled in the art, coking, change
The discharge of the industries such as work contains SO2Flue gas.The method of flue gas desulfurization provided by the utility model is capable of handling high density pollution
Object (SO2Concentration reaches 5000mg/Nm3) and the flue gas of big flow (exhaust gas volumn reaches 2000000Nm3/ h or more), the utility model
It is not specifically limited to this.
In the present invention, the liquid column-spraying desulfurization by the liquid column-spraying device formed liquid column-spraying layer into
Row, specifically includes desulfurization twice: being once that slurries injection direction contacts absorption SO with flue gas in the same direction2, it is that slurries reach for the second time
Highest point diverging is fallen, and is inversely contacted with flue gas and is absorbed SO2；In addition, liquid column-spraying is during slurries spray and decline upwards,
It is mutually collided between drop, will form a large amount of new drops, while is fused etc. there are also drop, can constantly generated new gas-liquid and connect
Contacting surface improves gas-liquid mass transfer efficiency.In the present invention, the injection flow velocity of the liquid column-spraying desulfurization be preferably 5m/s~
14m/s；The liquid-column height of the liquid column-spraying desulfurization is preferably 0.8m~6m, more preferably 0.8m~5m；The liquid column-spraying
The single layer liquid-gas ratio of desulfurization is preferably 13L/m3~25L/m3。
In the present invention, the turbulent drop contact desulfurization passes through the liquid column-spraying that the liquid column-spraying device is formed
The synergistic effect realization for the atomizing spray layer that layer is formed with the high-efficient atomizing spray equipment, specifically: in atomizing spray layer
Atomized drop passes through liquid film theoretical absorption SO2Afterwards, into liquid column-spraying layer；The slurries of atomizing spray can increase liquid column-spraying layer
Turbulence level, and drop, fluid column that the drop fallen of top rises with lower part are blended, are collided, and generate more fresh drops；
Meanwhile when the slurries of liquid column-spraying reach maximum height, it is in interim stationary state, atomized drop has certain at this time
Kinetic energy, hit topmost fluid column, drop etc. can generate more drops.According to liquid film renewal theory, drop absorption SO2
Surface can because top drop collision, form fresh absorbing film, and then good SO can be showed again2Absorb effect
Fruit improves the liquid film contacting efficiency in the region.
In the present invention, the atomization that the high-efficient atomizing spray desulfurization is formed by the high-efficient atomizing spray equipment
Spraying layer carries out.
In the present invention, the drop in the removing flue gas is realized by the demister.
The method of flue gas desulfurization provided by the utility model is assisted using slurries injection with atomizing spray in same absorption tower
With the mode of desulfurization, firstly, the slurries of lower part injection carry out contact absorption with flue gas in uphill process, at this time absorption efficiency compared with
It is low；When the slurries of injection reach top the SO in droplet, with flue gas can be formed because gravity scatter2Into
Row gas-liquid mass transfer, absorbing and removing SO2, removal efficiency is higher；Then, under liquid column-spraying layer and atomizing spray layer synergistic effect,
The slurries of atomizing spray can increase the turbulence level of liquid column-spraying layer, and drop, the liquid of the top drop fallen and lower part rising
Column is blended, is collided, and generates more fresh drops；Meanwhile when the slurries of liquid column-spraying reach maximum height, it is in
Interim stationary state, atomized drop has certain kinetic energy at this time, and more liquid can be generated by hitting topmost fluid column, drop etc.
Drop, to carry out turbulent drop contact desulfurization to flue gas；Finally, unabsorbed SO2Continue to rise, the atomizing spray with upper layer
Slurry liquid contacts carry out the mass transfer between gas-liquid, by the SO in flue gas2Thoroughly removing, reaches minimum discharge requirement, greatly improves
SO2Removal efficiency.In addition, the slurry circulating pump uses speed regulating control, it can be according to exhaust gas volumn, SO2Concentration etc. changes slurries
Internal circulating load gives full play to liquid column-spraying SO2Absorption efficiency；And the slurry circulating pump power with higher in desulfurization island, because
This speed regulating control for carrying out slurry circulating pump can reduce desulfurization island energy consumption, achieve the effect that energy-saving and emission-reduction.
The utility model provides a kind of device of flue gas desulfurization, comprising: absorption tower tower body；Absorption tower tower body lower part
Equipped with smoke inlet, top is equipped with exhanst gas outlet；The serum recycle being successively set on inside the absorbing tower body from bottom to top
Device, liquid column-spraying device, high-efficient atomizing spray equipment and demister；The liquid column-spraying device setting enters in the flue gas
Above mouthful；The liquid column-spraying device includes several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes are along the suction
One or more horizontal beddings inside tower tower body are received to be uniformly distributed；Each liquid column-spraying branch pipe bottom end and the serum recycle
Device communicates, and top is equipped with liquid column-spraying spray head；The inlet flue duct communicated with the smoke inlet；It is communicated with the exhanst gas outlet
Flue gases duct.Compared with prior art, the device of flue gas desulfurization provided by the utility model is closed using specific structure and connection
System can be realized the coordinated desulfurization effect of liquid column-spraying and high-efficient atomizing spray, have desulfuration efficiency height, desulfurization effect good and section
The advantages of consumption can be subtracted, and occupied space is smaller, is suitble to the flue gas desulfurization of high density pollution object and big flow.
In addition, device provided by the utility model can monitor each side's face data of flue gas in real time, and according to exhaust gas volumn,
SO2The data such as concentration carry out speed regulating control to slurry circulating pump and slurries spray pump, to reduce desulfurization island energy consumption, reach energy conservation
The effect of emission reduction.
In order to further illustrate the utility model, it is described in detail below by following embodiment.The utility model with
The structural schematic diagram of the device of flue gas desulfurization used in lower embodiment is shown in Figure 1；Wherein, wherein 1 be absorption tower tower body, 2
For smoke inlet, 3 be exhanst gas outlet, and 4 be serum recycle device, and 5 be liquid column-spraying device, and 6 be high-efficient atomizing spray equipment, 7
It is liquid column-spraying branch pipe for demister, 8,9 be liquid column-spraying spray head, and 10 be inlet flue duct, and 11 be flue gases duct, and 12 be slurry
Pond, 13 be slurry circulating pump, and 14 be reducer pipe, and 15 be slurries pipeline, and 16 be atomizing spray main pipe, and 17 be high-efficient atomizing spray head,
18 be import flue gas inspection point, and 19 be exiting flue gas test point, and 20 be control room.
Embodiment 1
It is 350000Nm that the device of above-mentioned flue gas desulfurization, which is applied in exhaust gas volumn,3The demonstration project of/h, engineering SO2Concentration
For 5000mg/Nm3, flue-gas temperature is 125 DEG C.
Absorption tower tower body is designed as tower height 29m, and diameter 8m, the high 7m of stock tank, smoke inlet is at 8.5m；Several described liquid
Column sprays branch pipe two horizontal beddings inside the absorbing tower body and is uniformly distributed, and forms two layers of liquid column-spraying layer, first layer
It is arranged in 9m, second layer arranged crosswise is in 10.5m；Two layers of atomizing spray main pipe is set, two layers of atomizing spray layer, first layer are formed
It is arranged in 17.5m, the second layer is arranged in 19.5m.The all atomization solid-cone spray heads of high-efficient atomizing spray head, two layers of arrangement,
Totally 100；The liquid column-spraying spray head arranged crosswise, single layer arrange 96.
It is 2000m that two flows, which are arranged,3The slurries spray pump of/h, power are respectively 160KW and 185KW；Two streams are set
Amount is 2000m3The frequency conversion type slurry circulating pump of/h, power are respectively 160KW and 185KW.
According to the engineering specifications in embodiment 1, desulfuration efficiency, pressure drop and the energy consumption descended under different condition at full capacity are investigated.
The case where investigating respectively includes: that liquid column-spraying desulfurization is used only under (1) full-load conditions；(2) it is used only under full negative loading condiction
High-efficient atomizing sprays desulfurization；(3) desulfurization is sprayed using single layer liquid column-spraying and single layer high-efficient atomizing under full-load conditions；(4) full
Two layers of liquid column-spraying and two layers of atomizing spray coordinated desulfurization are used under loading condiction.Engine results ginseng is shown in Table 1.
1 four, table pumps open to the maximum desulfurization effect data when power
As shown in Table 1, liquid column-spraying desulfuration efficiency is slightly above high-efficient atomizing spray desulfurization, and energy consumption is relatively low；Use single layer
Liquid column-spraying and single layer high-efficient atomizing spray, desulfuration efficiency, which is higher than, is used alone liquid column-spraying and exclusive use high-efficient atomizing spray
Desulfuration efficiency；Higher using two layers of liquid column-spraying and two layers of atomizing spray coordinated desulfurization efficiency, desulfuration efficiency can reach
99.3%, SO2Concentration of emission be 35mg/Nm3。
Embodiment 2
According to the basic condition in embodiment 1, two layers of atomizing spray layer is changed, first layer is arranged in 16.5m, second layer cloth
It sets in 18.5m；Meanwhile theory, when frequency conversion circulation slurry pump standard-sized sheet, the height of upper layer liquid column-spraying can reach the first floor
Atomizing spray layer height.
According to the engineering specifications in embodiment 2, the desulfurization between liquid column-spraying and atomizing spray under different height difference is investigated
Efficiency, pressure drop and energy consumption.The case where investigating respectively includes: that (upper layer fluid column jetting height can reach (A) four circulating pump standard-sized sheets
First layer atomizing spray layer)；(B) frequency conversion type slurry circulating pump is controlled, total serum recycle amount 7000m is made3/ h (upper layer fluid column spray
Penetrate the height distance first layer atomizing spray layer 1m that height can reach)；(C) frequency conversion type slurry circulating pump is controlled, total slurries are made
Internal circulating load is 6500m3/ h (the height distance first layer atomizing spray layer 1.5m that upper layer fluid column jetting height can reach)；(D)
Frequency conversion type slurry circulating pump is controlled, total serum recycle amount 6000m is made3/ h (the height that upper layer fluid column jetting height can reach
Apart from first layer atomizing spray layer 2m).Engine results ginseng is shown in Table 2.
Table 2 controls desulfurization effect data when frequency conversion type serum recycle pump power
As shown in Table 2, the energy consumption highest of A situation, but desulfuration efficiency is minimum, this is because the liquid column-spraying height on upper layer
The height of first layer high-efficient atomizing spray is reached, so that high-efficient atomizing spray is difficult to show atomizing effect；Fluid column sprays in the case of B
The height distance first layer high-efficient atomizing spray that penetrating can reach has the interval of 1m, and desulfurization effect highest, this illustrates at this for most
Good two layers of slurries mix distance；Desulfuration efficiency in the case of C and D gradually decreases, and respectively 94.2% and 92.1%, illustrate this
The height distance first layer high-efficient atomizing spray that liquid column-spraying can reach under part has the interval of 1.5m and 2m, and desulfurization effect is
Decline.In conclusion best desulfurization can be reached when liquid column-spraying layer sprays maximum height apart from minimum atomizing spray layer 1.0m
Effect.
Embodiment 3
The device of above-mentioned flue gas desulfurization is applied to certain project 660MW generator set desulfurization island, treatment quantity is
2120248Nm3/ h, desulfurization island inlet flue gas SO2Concentration is 4400mg/Nm3。
Absorption tower tower body diameter 16.8m, the high 13.3m of stock tank；Several described liquid column-spraying branch pipes are along the absorbing tower
Internal two, portion horizontal bedding is uniformly distributed, and the spacing distance of described two horizontal beddings is 1.5m, forms two layers of liquid column-spraying
Layer, 235 apertures of every layer arrangement are the liquid column-spraying spray head of 40mm；Two~tri- layers of atomizing spray main pipe are set, mist is integrally formed
Change spraying layer, the difference in height with liquid column-spraying layer is 6.5m.The high-efficient atomizing spray head is using SIC solid-cone spray head and hollow
Spray head is bored, according to generally conventional arrangement.
The slurry circulating pump A/B uses speed regulating control, flow 12000m3/h；The stream of corresponding slurries spray pump
It measures identical as the flow of the slurry circulating pump separate unit circulating pump.
The demister is demister, apart from atomizing spray layer 2m high.
Through project quality inspection under unit at full capacity operating condition, the device of flue gas desulfurization provided by the utility model be can be realized
SO2Minimum discharge (SO2≤35mg/Nm3)；Meanwhile, it is capable to reduce desulfurization island power consumption 15%~30% or so.
The above description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of device of flue gas desulfurization characterized by comprising
Absorption tower tower body；Absorption tower tower body lower part is equipped with smoke inlet, and top is equipped with exhanst gas outlet；
Serum recycle device, the liquid column-spraying device, high-efficient atomizing being successively set on inside the absorbing tower body from bottom to top
Spray equipment and demister；The liquid column-spraying device is arranged above the smoke inlet；The liquid column-spraying device packet
Include several liquid column-spraying branch pipes；Several described liquid column-spraying branch pipes are one or more horizontal inside the absorbing tower body
Level is uniformly distributed；Each liquid column-spraying branch pipe bottom end is communicated with the serum recycle device, and top is equipped with liquid column-spraying
Spray head；
The inlet flue duct communicated with the smoke inlet；
The flue gases duct communicated with the exhanst gas outlet.
2. the apparatus according to claim 1, which is characterized in that the serum recycle device includes:
The stock tank of absorption tower tower body bottom is set；Slurry circulating pump is equipped in the stock tank；
The reducer pipe communicated with each liquid column-spraying branch pipe；The diameter of the reducer pipe reduces along slurries flow direction；
It is connected to the slurries pipeline of the slurry circulating pump and reducer pipe.
3. the apparatus according to claim 1, which is characterized in that several described liquid column-spraying branch pipes are along the absorbing tower
Internal two, portion horizontal bedding is uniformly distributed；The spacing distance of described two horizontal beddings is 0.8m~2m；Each horizontal bedding
2/m is set2~4/m2Liquid column-spraying branch pipe.
4. the apparatus according to claim 1, which is characterized in that the high-efficient atomizing spray equipment includes:
Atomizing spray main pipe；
Several high-efficient atomizing spray heads around the atomizing spray main pipe are set；
The slurries spray pump communicated with the atomizing spray main pipe.
5. device according to claim 4, which is characterized in that the high-efficient atomizing spray head is atomization solid-cone spray head or mist
Change hollow cone spray head.
6. the apparatus according to claim 1, which is characterized in that the liquid column-spraying device setting is sprayed in the high-efficient atomizing
The underface of shower device；The spacing distance of the liquid column-spraying device and the high-efficient atomizing spray equipment is 3m~7m.
7. the apparatus according to claim 1, which is characterized in that the high-efficient atomizing spray equipment setting is filled in the demisting
The underface set；The spacing distance of the high-efficient atomizing spray equipment and the demister is 1.5m~3m.
8. described in any item devices according to claim 1~7, which is characterized in that further include:
The import flue gas inspection point of the inlet flue duct is set；
The exiting flue gas test point of the flue gases duct is set；
The control room being connected respectively with the import flue gas inspection point and exiting flue gas test point.
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