CN206965475U - A kind of desulfurating dust removing device for flue gas and flue gas desulfurization dust-removal system - Google Patents
A kind of desulfurating dust removing device for flue gas and flue gas desulfurization dust-removal system Download PDFInfo
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- CN206965475U CN206965475U CN201720156538.0U CN201720156538U CN206965475U CN 206965475 U CN206965475 U CN 206965475U CN 201720156538 U CN201720156538 U CN 201720156538U CN 206965475 U CN206965475 U CN 206965475U
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Abstract
It the utility model is related to a kind of desulfurating dust removing device for flue gas and flue gas desulfurization dust-removal system；The desulfurating dust removing device for flue gas includes desulfurizing tower, it is sequentially provided with first grade desulfurizing spray equipment, two-grade desulfurizing filling-material structure and wet electrical dust precipitator in desulfurizing tower from bottom to top between gas approach and exhanst gas outlet, the desulfurizing agent that first grade desulfurizing spray equipment is used to spray into wet desulphurization into desulfurizing tower carries out first grade desulfurizing；Two-grade desulfurizing filling-material structure includes desulfurization packing layer and two-grade desulfurizing injection apparatus, and two-grade desulfurizing injection apparatus makes filler surface form desulfurizing agent liquid film progress two-grade desulfurizing for continuously spraying sodium base or potassium base desulfurizer to desulfurization packing layer.First grade desulfurizing spray equipment, two-grade desulfurizing filling-material structure and wet electrical dust precipitator are coupled into same desulfurizing tower by the device, play the effect of coordinated desulfurization dedusting to greatest extent；Compact-sized, floor space is small, is not required to additionally set two-grade desulfurizing agent retracting device and wet electrical dust precipitator cleaning device, up-front investment is few, and cost is low.
Description
Technical field
The utility model belongs to fume treatment technical field, and in particular to a kind of desulfurating dust removing device for flue gas, while also relate to
A kind of and flue gas desulfurization dust-removal system.
Background technology
Flue gas desulfurization (Flue Gas Desulfuration, FGD) refers to remove from flue gas or other industrial waste gases
Oxygen sulfur compound (mainly SO2And SO3) process.Oxysulfide in flue gas be substantially it is acid, can by with it is appropriate
Alkali substance reaction, the mixture of sulphite and sulfate is generated, so as to be removed from flue gas.Conventional wet desulphurization work
Skill includes limestone-gypsum method, ammonia process, seawater method, magnesium oxide method etc.；Wherein, Limestone-gypsum Wet Flue Gas Desulfurization Process technology into
Ripe, good economy performance, is most widely used.
In sulfur oxides emissions national standard, sulfur dioxide emissioning concentration is only controlled at present, is not arranged including sulfur trioxide
Put concentration.Unavoidably there is certain sulfur trioxide concentration in flue gas, and sulfur trioxide generally requires deep desulfuration technique
Can removing.Existing wet desulfurizing process is in terms of deep removal oxysulfide, it usually needs and improve the means such as gas liquid ratio and realize,
It is high to reconstruct newly-built cost, operation expense is high, and adjustment control outlet sulfoxide concentration performance is bad, adapts to variable parameter operation
Ability is poor.There is a kind of spray packed tower in wet desulfurizing process, it has the spies such as gas-liquid mass transferring area is big, mass-transfer efficiency is high
Point, but because in the easy fouling and clogging of packing layer, be not used widely.Therefore, generally existing wet desulfurizing process
It is preferable for the removal effect of sulfur dioxide, but it is universal not high for sulfur trioxide removal efficiency.
As in the prior art, CN103861438A discloses a kind of system of deep removal coal-fired flue-gas oxysulfide, should
System includes being sequentially connected logical wet method single column high-efficiency desulfurization system, sorbent injection system and wet electrostatic gas cleaning system
System, wet method single column high-efficiency desulfurization system include desulfurizing tower, above the slurry pool of desulfurizing tower from bottom to top provided with 2-5 layers spraying layer,
1-2 layer demisters；Coal-fired flue-gas enters back into sorbent injection system after wet method single column high-efficiency desulfurization system carries out preliminary desulfurization
System, alkali lye sodium hydroxide or ammoniacal liquor are mixed with coal-fired flue-gas by injection apparatus, realized to SO2Further removing, part SO3
Form sulphate particle；The unnecessary alkali lye of flue gas entrainment portions enters wet electrostatic flue gas purification system, and unnecessary alkali lye is by wet
Formula electrostatic flue gas purification system removes, and wet electrical dust precipitator removes to the sulfuric acid aerosol formed in flue gas, realizes
Deep removal oxysulfide.But on the one hand its sorbent injection system integral arrangement increases equipment volume after desulfurizing tower
And floor space；Another aspect sorbent injection device is arranged in flue, and without special conversion zone, flue gas flow rate is fast,
The time of contact of absorbent and flue gas is short, contact area is small, and absorbent utilization rate is not high, the gross efficiency of deep removal oxysulfide
It is not high；Absorbent liquid collecting is more serious in flue, and absorbent recycles difficult, it is necessary to which special recirculation system is supporting makes
With up-front investment is larger, and operating cost is high.Meanwhile wet electrical dust precipitator integral arrangement is after sorbent injection system, structure
It is compact not enough；Wet electrical dust precipitator collects the water smoke drop of flue gas, continuous moisture film is formed on dust collector pole surface, so as to reach deashing
Effect, in order to ensure the cleaning of dust collector pole, device interior stills need to configure purging system, using subregion, is periodically interrupted
Backwashing manner ensures the Effec-tive Function of electric field, a 300MW unit, daily water consumption at 10 tons or so, cleaning is inconvenient, into
This height and rinse water recycle difficult.
The content of the invention
The purpose of this utility model is to provide the effect of a kind of desulfurating dust removing device for flue gas, deep removal oxysulfide and dedusting
Rate is high, and compact-sized, and cost is low.
Second purpose of the present utility model is to provide a kind of flue gas desulfurization dust-removal system.
In order to realize the above object technical scheme is used by the utility model：
A kind of desulfurating dust removing device for flue gas, including desulfurizing tower, the desulfurizing tower lower section is provided with gas approach, top is provided with cigarette
Gas is exported, and first grade desulfurizing spray equipment, two level are sequentially provided with from bottom to top between gas approach and exhanst gas outlet in desulfurizing tower
Desulfurization filling-material structure and wet electrical dust precipitator, the first grade desulfurizing spray equipment are used to spray into the de- of wet desulphurization into desulfurizing tower
Sulphur agent carries out first grade desulfurizing；The two-grade desulfurizing filling-material structure includes desulfurization packing layer and two-grade desulfurizing injection apparatus, and described two
Level desulfurization injection apparatus makes filler surface form desulfurizing agent liquid for continuously spraying sodium base or potassium base desulfurizer to desulfurization packing layer
Film carries out two-grade desulfurizing.
The wet electrical dust precipitator is vertical wet electrical dust precipitator.
The two-grade desulfurizing filling-material structure includes at least two layers separate desulfurization filler set gradually from bottom to top
Layer, two-grade desulfurizing injection apparatus is set between adjacent two layers desulfurization packing layer.
The two-grade desulfurizing injection apparatus is including feed pipe and the upward atomizer being connected on feed pipe and downwards
Atomizer；The one end of the feed pipe away from atomizer, which is stretched out outside desulfurizing tower, to be used to connect two-grade desulfurizing liquid feed device.
The filler of the desulfurization packing layer is the structured packing of plate-type.
In the two-grade desulfurizing filling-material structure, the filler plate spacing of top desulfurization packing layer is not more than lower section desulfurization packing layer
Filler plate spacing.Preferably, the filler plate spacing of the top desulfurization packing layer is 20-25mm, can more effectively trap flue gas
In atomized drop.
The pressure-detecting device for detecting desulfurization packing layer pressure difference is additionally provided with the desulfurizing tower.
The desulfurization tower bottom is provided with recycle slurry liquid pool, and the recycle slurry liquid pool is sprayed by circulating line and first grade desulfurizing
Device is connected, and first grade desulfurizing is carried out for the serum recycle in recycle slurry liquid pool to be sprayed into desulfurizing tower.
Desulfurating dust removing device for flue gas of the present utility model in use, pending flue gas from gas approach enter desulfurizing tower in,
Flow from bottom to top, the desulfurizing agent of the wet desulphurization first sprayed into first grade desulfurizing spray equipment is reacted, after reactive desulfurizing agent
Fall into the recycle slurry liquid pool of desulfurization tower bottom；Flue gas after first grade desulfurizing enters desulfurization packing layer, with two-grade desulfurizing injection apparatus
The desulfurizing agent liquid film reaction that the two-grade desulfurizing agent atomized drop or atomized drop continuously sprayed is formed on filler surface carries out secondary
Desulfurization, the filled trapping of atomized drop of reaction, in filler surface aggregation, keep the infiltration of filler surface, filler surface liquid film because
Gravity flows downward up to departing from filler, falls into the recycle slurry liquid pool of desulfurization tower bottom；Flue gas after two-grade desulfurizing is through vertical wet
After formula electric cleaner dedusting, discharged from exhanst gas outlet.For first grade desulfurizing, the usage amount of the desulfurizing agent of two-grade desulfurizing is relative
It is less, it will not be affected greatly for first grade desulfurizing slurry content.
Desulfurating dust removing device for flue gas of the present utility model, by first grade desulfurizing spray equipment, two-grade desulfurizing filling-material structure and wet
Formula electric cleaner is coupled into same desulfurizing tower, substantially conventional wet lay desulfurizer, packing type wet desulphurization device with
The tandem compound of Wet type electric dust-removing device, is arranged so as to, and flue gas resistance is small, and simple system is compact-sized, and floor space is small；One
Using conventional wet desulfurizing process, desulfurizing agent cost is low for level desulfurization, undertakes the desulfurization task of the overwhelming majority and least a portion of removes
Dirt task；Two-grade desulfurizing is carried out using relatively high cost, soluble in water sodium base or potassium base desulfurizer and desulfurization packing layer, held
Deep desulfuration task is carried on a shoulder pole, realizes two-stage deep desulfuration.The desulfurization packing layer conversion zone special as two-grade desulfurizing, desulfurizing agent with
The time of contact of flue gas is long, contact area is big, and the utilization rate of desulfurizing agent is high, improves two-grade desulfurizing efficiency, the oxidation of deep removal sulphur
The gross efficiency of thing is high；And the desulfurizing agent of two-grade desulfurizing eventually falls into recycle slurry liquid pool, circulate for first grade desulfurizing, two-grade desulfurizing is not
Special desulfurizing agent recirculation system is needed, up-front investment is small, and low using the improvement cost of existing equipment, operating cost is low.
Meanwhile two-grade desulfurizing injection apparatus continuously sprays sodium base or potassium base desulfurizer to desulfurization packing layer, formed and flowed on filler surface
Liquid film, keep the wetting state on filler surface, good flushing action can be kept to desulfurization packing layer, be not susceptible to packing layer
Fouling and clogging problem.
Vertical wet electrical dust precipitator is arranged above two-grade desulfurizing filling-material structure, desulfurization packing layer can be used as wet-esp
It is short to have prevented inside smoke by setting the inside smoke passage of honeycomb fashion for the flue gas rectification layer of device, vertical wet electrical dust precipitator
Road channelling problem, but the operating efficiency evenly distributed for wet electrical dust precipitator of its porch flue gas also has a significant impact.Through
The rectified action of two-step desulfurization packing layer is crossed, into before vertical wet electrical dust precipitator, flue gas is distributed than more uniform, uniformly
The flue gas that becomes a mandarin be favorably improved the operating efficiency of wet electrical dust precipitator.Wet electrical dust precipitator can persistent collection to more liquid
Drop, realize that self-cleaning cleans using the water smoke in the desulfurizing agent drop and flue gas of collection, it is not necessary to set extra dust collector pole clear
Cleaning device；Vertical wet electrical dust precipitator can undertake depth dedusting, depth demisting task and portion as the final stage demister of desulfurizing tower
Point desulfurization task, the oxysulfide of neat stress, dustiness, water content is kept to meet control targe.Two-grade desulfurizing injection apparatus sprays
The desulfurization agent flux penetrated can be adjusted according to the pollution level on the dust collector pole surface of vertical wet electrical dust precipitator, when dust collector pole table
When face filth is reached to a certain degree, the penetrating flow of desulfurizing agent is increased in short-term, and wet electrical dust precipitator is collected desulfurizing agent drop and rushed
Dust collector pole is washed, plays the effect of coordinated desulfurization dedusting to greatest extent.The drop that vertical wet electrical dust precipitator is collected falls into following
Desulfurization packing layer, finally fall into the recycle slurry liquid pool of desulfurizing tower.This partial drop can keep desulfurization to fill out in dropping process
Bed of material filler surface infiltrates, and plays desulfidation.
Further, the pressure detecting that every layer of desulfurization packing layer is correspondingly arranged on for detecting desulfurization packing layer pressure difference fills
Put.In the process of running, the penetrating flow of the desulfurizing agent of two-grade desulfurizing is according to de- for desulfurating dust removing device for flue gas of the present utility model
The difference adjustment of the concentration of sulphur tower outlet oxysulfide and the emission control aimed concn of setting, makes concentration of emission meet discharge control
Target processed；The flow that sprays into of the desulfurizing agent of two-grade desulfurizing adjusts according to the pressure difference of desulfurization packing layer simultaneously, short when pressure difference increases
Desulfurization packing layer corresponding to Shi Zeng great flow cleanings.
A kind of flue gas desulfurization dust-removal system, including above-mentioned desulfurating dust removing device for flue gas, in addition to the flue gas with desulfurizing tower
The dry collector of import connection.
The dry collector is electric-bag complex dust collector.
The gas approach of the dry collector is connected with gas cooler.
Flue gas desulfurization dust-removal system of the present utility model, along flow of flue gas direction, also it has been sequentially arranged before desulfurizing tower
Gas cooler and electric-bag complex dust collector, gas cooler can reduce flue-gas temperature, in flue gas under the ratio resistance value of flue dust
Drop, so as to improve the efficiency of dust collection of electric-bag complex dust collector, electric-bag complex dust collector undertakes basic dedusting function；Simultaneously
Oxysulfide in partial removal flue gas；Dedusting stage good dust removing effects and partial desulfurization effect, contribute to before desulfurizing tower
Improve first grade desulfurizing, the deep desulfuration of two-grade desulfurizing and wet electrical dust precipitator, depth dust removing effects in desulfurizing tower.
Brief description of the drawings
Fig. 1 is the structural representation of the desulfurating dust removing device for flue gas of embodiment 1；
Fig. 2 is the structural representation of the flue gas desulfurization dust-removal system of embodiment 2.
Embodiment
The utility model is further described with reference to embodiment.
Embodiment 1
The desulfurating dust removing device for flue gas of the present embodiment 1, as shown in figure 1, including desulfurizing tower 1, the lower section of desulfurizing tower 1 is provided with
Gas approach 2, top are provided with exhanst gas outlet 3, and the bottom of desulfurizing tower 1 is provided with recycle slurry liquid pool 4 in the lower section of the gas approach 2；
It is sequentially provided with first grade desulfurizing spray dress in the desulfurizing tower 1 from bottom to top between gas approach 2 and exhanst gas outlet 3
Put, two-grade desulfurizing filling-material structure and vertical wet electrical dust precipitator 13, first grade desulfurizing spray equipment are used to spray downwards into desulfurizing tower
The desulfurizing agent for entering wet desulphurization carries out first grade desulfurizing；Wet desulfurizing process used in the present embodiment first grade desulfurizing is lime stone-stone
Cream method, the desulfurizing agent of first grade desulfurizing is calcium carbonate serosity；The first grade desulfurizing spray equipment includes what is set gradually from bottom to top
Three layers of spraying layer, respectively the first spraying layer 5-1, the second spraying layer 5-2, the 3rd spraying layer 5-3, the spraying layer is by following
Endless tube road 11 is connected with recycle slurry liquid pool 4, and the recycle slurry liquid pool 4 is connected with one-level feed flow pond 10 by one-level solution feed pump；
The one-level feed flow pond 10 is used for the desulfurizing agent (calcium carbonate serosity) for preparing first grade desulfurizing, and circulation is delivered to by one-level solution feed pump
Slurry pool 4；The circulating line 11 is provided with circulating pump, for the slurries in recycle slurry liquid pool 4 to be delivered into first grade desulfurizing spray
Three layers of spraying layer of shower device simultaneously spray into progress first grade desulfurizing in desulfurizing tower；
The two-grade desulfurizing filling-material structure includes two layers of the separate desulfurization packing layer set gradually from bottom to top, point
Not Wei the first packing layer 6-1, the second packing layer 6-2, two-grade desulfurizing injection apparatus 7, two level are set between two layers of desulfurization packing layer
Desulfurization injection apparatus 7 includes feed pipe 12 and the upward atomizer being connected on feed pipe 12 and downward atomizer
(atomizer used is double fluid atomization nozzle)；The one end of the feed pipe 12 away from atomizer is stretched out outside desulfurizing tower 1
Two-grade desulfurizing feed flow pond 8 and compressed air reservoir 9 are connected, the two-grade desulfurizing feed flow pond 8 is used to prepare the de- of two-grade desulfurizing
Sulphur agent, the present embodiment use mass concentration as desulfurizing agent of 5% sodium carbonate liquor (sodium base desulfurizer) as two-grade desulfurizing, take off
The compressed air of sulphur agent and atomizer be atomized to be formed the less atomized drop of particle diameter (atomizing particle size control 10-200 microns it
Between).The filler of the desulfurization packing layer is the structured packing of plate-type, and the second packing layer 6-2 filler plate is smaller than first
Packing layer 6-1 filler plate spacing, the second packing layer 6-2 filler plate spacing is 20-25mm；The two-grade desulfurizing injection apparatus
For making filler surface shape to desulfurizing agent (sodium carbonate liquor) atomized drop of the continuous atomized spray two-grade desulfurizing of desulfurization packing layer
Two-grade desulfurizing is carried out into desulfurizing agent liquid film.
The desulfurating dust removing device for flue gas of the present embodiment is in use, pending flue gas enters in desulfurizing tower from gas approach, certainly
Lower and upper flowing, the desulfurizing agent (calcium carbonate serosity) first sprayed into first grade desulfurizing spray equipment is reacted, after reactive desulfurizing agent
Fall into the recycle slurry liquid pool of desulfurization tower bottom.Flue gas after first grade desulfurizing enters desulfurization packing layer, with two-grade desulfurizing injection apparatus
The desulfurizing agent liquid film reaction that the two-grade desulfurizing agent atomized drop or atomized drop continuously sprayed is formed on filler surface carries out secondary
Desulfurization, the filled trapping of atomized drop of reaction, in filler surface aggregation, keep the infiltration of filler surface, filler surface liquid film because
Gravity flows downward up to departing from filler, falls into the recycle slurry liquid pool of desulfurization tower bottom；Flue gas after two-grade desulfurizing is through vertical wet
After formula electric cleaner dedusting, discharged from exhanst gas outlet.
Every layer of desulfurization packing layer is correspondingly arranged on the pressure-detecting device for detecting desulfurization packing layer pressure difference.This implementation
In the process of running, the penetrating flow of the desulfurizing agent of two-grade desulfurizing is according to desulfurizing tower outlet sulphur oxygen for the desulfurating dust removing device for flue gas of example
The difference adjustment of the concentration of compound and the emission control aimed concn of setting, makes concentration of emission meet emission control target；Simultaneously
The flow that sprays into of the desulfurizing agent of two-grade desulfurizing adjusts according to the pressure difference of desulfurization packing layer, when pressure difference increases, increases flow in short-term
Desulfurization packing layer corresponding to cleaning.
Two-grade desulfurizing injection apparatus continuously sprays into desulfurizing agent, avoids the fluctuation by a relatively large margin of flue gas water content, discharges flue gas
Water content is more stable；Meanwhile the significantly change of the loop slurry pit level of desulfurization tower bottom is it also avoid, Liquid level is easier
Stably, desulfurizing tower amount of makeup water keeps relatively continuous balanced；Big amplitude variation will not also occur for the density of slurries in recycle slurry liquid pool
Change, serum density and pH value control are more stable, and first grade desulfurizing is by controlling loop slurry according to conventional wet desulfurizing process
The pH value range of slurries controls the penetrating flow of desulfurizing agent in pond, and control is easier.
The desulfurating dust removing device for flue gas of the present embodiment, by first grade desulfurizing spray equipment, two-grade desulfurizing filling-material structure and wet type
Electric cleaner is coupled into same desulfurizing tower, substantially conventional wet lay desulfurizer, packing type wet desulphurization device with it is wet
The tandem compound of formula electric dust collector, is arranged so as to, and flue gas resistance is small, and simple system is compact-sized, and floor space is small；One-level
Using conventional wet desulfurizing process, desulfurizing agent cost is low, undertakes the desulfurization task of the overwhelming majority and least a portion of dedusting for desulfurization
Task；Two-grade desulfurizing is carried out using relatively high cost, soluble in water sodium base or potassium base desulfurizer and desulfurization packing layer, undertaken
Deep desulfuration task, realize two-stage deep desulfuration.The desulfurization packing layer conversion zone special as two-grade desulfurizing, desulfurizing agent and cigarette
The time of contact of gas is long, contact area is big, and the utilization rate of desulfurizing agent is high, improves two-grade desulfurizing efficiency, deep removal oxysulfide
Gross efficiency it is high；And the desulfurizing agent of two-grade desulfurizing eventually falls into recycle slurry liquid pool, circulate and be not required to for first grade desulfurizing, two-grade desulfurizing
Special desulfurizing agent recirculation system is wanted, up-front investment is small, and low using the improvement cost of existing equipment, operating cost is low.
Vertical wet electrical dust precipitator is arranged above two-grade desulfurizing filling-material structure, desulfurization packing layer can be used as wet-esp
It is short to have prevented inside smoke by setting the inside smoke passage of honeycomb fashion for the flue gas rectification layer of device, vertical wet electrical dust precipitator
Road channelling problem, but the operating efficiency evenly distributed for wet electrical dust precipitator of its porch flue gas also has a significant impact.Through
The rectified action of two-step desulfurization packing layer is crossed, into before vertical wet electrical dust precipitator, flue gas is distributed than more uniform, uniformly
The flue gas that becomes a mandarin be favorably improved the operating efficiency of wet electrical dust precipitator.Wet electrical dust precipitator can persistent collection to more liquid
Drop, realize that self-cleaning cleans using the water smoke in the desulfurizing agent drop and flue gas of collection, it is not necessary to set extra dust collector pole clear
Cleaning device；Vertical wet electrical dust precipitator can undertake depth dedusting, depth demisting task and portion as the final stage demister of desulfurizing tower
Point desulfurization task, the oxysulfide of neat stress, dustiness, water content is kept to meet control targe.Two-grade desulfurizing injection apparatus sprays
The desulfurization agent flux penetrated can be adjusted according to the pollution level on the dust collector pole surface of vertical wet electrical dust precipitator, when dust collector pole table
When face filth is reached to a certain degree, the penetrating flow of desulfurizing agent is increased in short-term, and wet electrical dust precipitator is collected desulfurizing agent drop and rushed
Dust collector pole is washed, plays the effect of coordinated desulfurization dedusting to greatest extent.The drop that vertical wet electrical dust precipitator is collected falls into following
Desulfurization packing layer, finally fall into the recycle slurry liquid pool of desulfurizing tower.This partial drop can keep desulfurization to fill out in dropping process
Bed of material filler surface infiltrates, and plays desulfidation.
Using the desulfurating dust removing device for flue gas of the present embodiment, relatively low sulfur oxides emissions concentration, one-level can be kept
Desulfurization can reach than relatively low sulfur dioxide concentration, as sulfur dioxide concentration is maintained at 30mg/Nm3Left and right；Two-grade desulfurizing leads to
Atomized spray desulfurizing agent is crossed, very big desulfurizing agent surface area can be formed on filler surface, is advantageous to oxysulfide solution absorption,
Two-grade desulfurizing can realize deep removal oxysulfide, and two-grade desulfurizing position flue-gas temperature has descended to 50 DEG C or so, dioxy
It is higher to change the solubility of sulphur, under the collective effect of these factors, two-grade desulfurizing can realize deep removal oxysulfide, two
Sulfur oxide concentration is positively retained at 10mg/Nm3Within, even up to 5mg/Nm3Within, two-grade desulfurizing, which can undertake, a small amount of enters one
Walk dedusting task.Vertical wet electrical dust precipitator can play a part of depth dedusting, and dedusting concentration of emission is in 5mg/Nm3Within,
And acid drop remaining in depth demisting, removing flue gas can be played a part of.
Embodiment 2
The flue gas desulfurization dust-removal system of the present embodiment, include the desulfurating dust removing device for flue gas of embodiment 1, as shown in Fig. 2 also
Including the gas cooler 15 and electric-bag complex dust collector 14 being sequentially connected in series along flow of flue gas direction, the electric-bag complex dust collector
14 are connected with the gas approach 2 of desulfurizing tower 1.
The flue gas desulfurization dust-removal system of the present embodiment, along flow of flue gas direction, cigarette is also sequentially arranged before desulfurizing tower
Gas Cooler and electric-bag complex dust collector, gas cooler can reduce flue-gas temperature, and the ratio resistance value of flue dust declines in flue gas,
So as to improve the efficiency of dust collection of electric-bag complex dust collector, electric-bag complex dust collector undertakes basic dedusting function；Portion simultaneously
The oxysulfide divided in removing flue gas；Dedusting stage good dust removing effects and partial desulfurization effect, help to carry before desulfurizing tower
First grade desulfurizing, the deep desulfuration of two-grade desulfurizing and wet electrical dust precipitator, depth dust removing effects in high desulfurizing tower.
In other embodiment of the present utility model, the desulfurizing agent for the wet desulphurization that first grade desulfurizing spray equipment sprays into may be used also
To use existing conventional wet desulfurizing process desulfurizing agent as corresponding to ammonia process, seawater method, magnesium oxide method etc..Two-grade desulfurizing filler
The sodium base or potassium base desulfurizer for the two-grade desulfurizing that the two-grade desulfurizing injection apparatus of structure sprays into, wherein sodium base desulfurizer can also be
Sodium acid carbonate, sodium hydroxide, trona etc., potassium base desulfurizer can be potassium carbonate, saleratus, potassium hydroxide etc., add water to match somebody with somebody
Solution is made or slurries use.
Claims (10)
1. a kind of desulfurating dust removing device for flue gas, including desulfurizing tower, the desulfurizing tower lower section is provided with gas approach, top is provided with flue gas
Outlet, it is characterised in that：It is sequentially provided with first grade desulfurizing spray in desulfurizing tower from bottom to top between gas approach and exhanst gas outlet
Device, two-grade desulfurizing filling-material structure and wet electrical dust precipitator, the first grade desulfurizing spray equipment are wet for being sprayed into desulfurizing tower
The desulfurizing agent of method desulfurization carries out first grade desulfurizing；The two-grade desulfurizing filling-material structure includes desulfurization packing layer and two-grade desulfurizing injection dress
Put, the two-grade desulfurizing injection apparatus forms filler surface for continuously spraying sodium base or potassium base desulfurizer to desulfurization packing layer
Desulfurizing agent liquid film carries out two-grade desulfurizing.
2. desulfurating dust removing device for flue gas according to claim 1, it is characterised in that：The two-grade desulfurizing filling-material structure includes
At least two layers separate desulfurization packing layer set gradually from bottom to top, two level is set between adjacent two layers desulfurization packing layer
Desulfurization injection apparatus.
3. desulfurating dust removing device for flue gas according to claim 2, it is characterised in that：The two-grade desulfurizing injection apparatus includes
Feed pipe and the upward atomizer being connected on feed pipe and downward atomizer；The feed pipe is away from atomizer
One end stretch out desulfurizing tower outside be used for connect two-grade desulfurizing liquid feed device.
4. desulfurating dust removing device for flue gas according to claim 2, it is characterised in that：The filler of the desulfurization packing layer is plate
The structured packing of piece type.
5. desulfurating dust removing device for flue gas according to claim 4, it is characterised in that：In the two-grade desulfurizing filling-material structure,
The filler plate spacing of top desulfurization packing layer is not more than the filler plate spacing of lower section desulfurization packing layer.
6. desulfurating dust removing device for flue gas according to claim 1, it is characterised in that：It is additionally provided with the desulfurizing tower for examining
Survey the pressure-detecting device of desulfurization packing layer pressure difference.
7. desulfurating dust removing device for flue gas according to claim 1, it is characterised in that：The desulfurization tower bottom is provided with recycle slurry
Liquid pool, the recycle slurry liquid pool are connected by circulating line with first grade desulfurizing spray equipment, for by recycle slurry liquid pool
Serum recycle sprays into desulfurizing tower and carries out first grade desulfurizing.
A kind of 8. flue gas desulfurization dust-removal system, it is characterised in that：Including the flue gas desulfurization as any one of claim 1-7
Dust arrester, in addition to the dry collector being connected with the gas approach of desulfurizing tower.
9. flue gas desulfurization dust-removal system according to claim 8, it is characterised in that：The dry collector is that electric bag is compound
Deduster.
10. flue gas desulfurization dust-removal system according to claim 8, it is characterised in that：The flue gas of the dry collector enters
Mouth is connected with gas cooler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720156538.0U CN206965475U (en) | 2017-02-21 | 2017-02-21 | A kind of desulfurating dust removing device for flue gas and flue gas desulfurization dust-removal system |
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| CN201720156538.0U CN206965475U (en) | 2017-02-21 | 2017-02-21 | A kind of desulfurating dust removing device for flue gas and flue gas desulfurization dust-removal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144407A (en) * | 2022-12-28 | 2023-05-23 | 天津铁厂有限公司 | A method of using sodium hydroxide to reduce the resistance of coke oven gas desulfurization tower |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144407A (en) * | 2022-12-28 | 2023-05-23 | 天津铁厂有限公司 | A method of using sodium hydroxide to reduce the resistance of coke oven gas desulfurization tower |
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