CN209576218U - Acid regeneration smoke processing system - Google Patents
Acid regeneration smoke processing system Download PDFInfo
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- CN209576218U CN209576218U CN201822202238.9U CN201822202238U CN209576218U CN 209576218 U CN209576218 U CN 209576218U CN 201822202238 U CN201822202238 U CN 201822202238U CN 209576218 U CN209576218 U CN 209576218U
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- flue gas
- acid
- spent acid
- scrubbing tower
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- 239000002253 acid Substances 0.000 title claims abstract description 54
- 230000008929 regeneration Effects 0.000 title claims abstract description 35
- 238000011069 regeneration method Methods 0.000 title claims abstract description 35
- 239000000779 smoke Substances 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 109
- 239000003546 flue gas Substances 0.000 claims abstract description 102
- 238000001816 cooling Methods 0.000 claims abstract description 61
- 239000000428 dust Substances 0.000 claims abstract description 52
- NMCUIPGRVMDVDB-UHFFFAOYSA-L Iron(II) chloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims abstract description 51
- 238000005201 scrubbing Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000007921 spray Substances 0.000 claims abstract description 37
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 46
- 238000010992 reflux Methods 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 239000008237 rinsing water Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 31
- 238000000034 method Methods 0.000 abstract description 14
- 239000003595 mist Substances 0.000 abstract description 14
- 238000005406 washing Methods 0.000 abstract description 10
- 238000000746 purification Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 18
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 10
- 238000003672 processing method Methods 0.000 description 10
- 230000001808 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000003020 moisturizing Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000003247 decreasing Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000000903 blocking Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 229940067573 BROWN IRON OXIDE Drugs 0.000 description 1
- 230000003139 buffering Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005039 chemical industry Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000009114 investigational therapy Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000011068 load Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Abstract
The utility model relates to a kind of acid regeneration smoke processing systems, including passing through the sequentially connected absorption tower of flue gas pipeline, spent acid scrubbing tower, venturi scrubber, water cooling tower, second level scrubbing tower, dust-extraction unit and blowdown stack, spent acid spray unit is equipped in spent acid scrubbing tower.Acid regeneration flue gas after Venturi preconcentrator cools down, successively carry out sour absorption by absorption tower, be dusted processing by spent acid scrubbing tower, through venturi scrubber carrying out washing treatment to remove part dust in flue gas and acid mist, second level carrying out washing treatment is carried out after spraying cooling is handled, discharged after dust removal process especially wet electrical dust precipitator is handled.Spent acid is preheated while to flue gas ash removal by the way that spent acid scrubbing tower is arranged, acid purification system operation energy consumption can be saved；Process is reasonable, and treated, and flue gas can reach more excellent discharge index, and the flue gas discharged has achieved the effect that " disappearing white ".
Description
Technical field
The utility model belongs to hydrochloride waste regeneration treatment technical field, and in particular to a kind of acid regeneration fume treatment system
System.
Background technique
Hydrochloric acid is a kind of important industrial production articles, is widely used in steel industry cold mill complex, tubulation industry pickling
Section, the acid leaching system of chemical industry, etching industry etc..When hydrochloride waste consumption is larger, spray roasting or stream are generally used
Change bed process to be handled.Its principle is equal are as follows: sprays into concentration in roaster (or other roasting apparatus, such as rotary kiln) high-temperature area
Waste acid liquid afterwards, after high temeperature chemistry is heat-treated, high-temperature roasting flue gas is by Venturi preconcentrator (or his equipment)
Cool down, flue-gas temperature is cooled to 95 DEG C or so, and the absorption of HCl is carried out into absorption tower, and subsequent technique can be adopted as needed
Take different process lines.Conventional flowsheet is absorption tower-exhaust gas fan-secondary scrubber, the flue gas behind absorption tower
Still HCl and dust containing higher concentration, etchant gas can directly etching exhaust gas fan and impellers；And common process can not
Meet the minimum discharge standard that country will execute.
And pass through investigation, preferable acid regeneration process dust emission index is run both at home and abroad at present generally in 15-30mg/
Nm3, the bad acid purification system discharge index of some operating statuses has been even more than 50mg/Nm3.In addition, due to spray roasting
Regeneration of hydrochloric acid system needs periodic cleaning acid rifle, and when cleaning sour rifle, the process for needing to mention rifle, dropping rifle in the process can be right
Air flow condition in roaster generates fluctuation, to influence the dust pollution object concentration discharged in chimney.
For the demand of the stringent and minimum discharge of environmental requirement, the direction studied both at home and abroad is reduction flue-gas temperature,
To achieve the purpose that reduce pollutant emission.Some enterprises, which are utilized on flue, is arranged graphite heat exchanger to high temperature containing acid fume
Gas carries out cooling down, these techniques can achieve the effect for reducing flue-gas temperature to a certain extent in the short term, reduces cigarette
HCl content in gas；But contain a certain amount of brown iron oxide dust in flue gas, longtime running will cause stone inside graphite heat exchanger
Ink stick hole is blocked by iron powder, seriously affects the heat exchange efficiency and normal use of heat exchanger.In addition, gas enters changing in heat exchanger
The thermal efficiency is relatively low, and the heat exchange area generally required is larger, and equipment price is higher.So the above method can only reduce cigarette
The content of HCl in gas, it not is fairly obvious that the dust content in flue gas, which is acted on, is still difficult to persistently meet minimum discharge
10mg/Nm3Requirement, especially clean in a period of time before and after sour rifle, the concentration of emission of dust is even more relatively high.
Utility model content
The utility model embodiment is related to a kind of acid regeneration smoke processing system, and the part that can at least solve the prior art lacks
It falls into.
The utility model embodiment is related to a kind of acid regeneration smoke processing system, including sequentially connected by flue gas pipeline
Absorption tower, spent acid scrubbing tower, venturi scrubber, water cooling tower, second level scrubbing tower, dust-extraction unit and blowdown stack, institute
It states and is equipped with spent acid spray unit in spent acid scrubbing tower.
As one of embodiment, the dust-extraction unit includes wet electrical dust precipitator.
As one of embodiment, the anode of the wet electrical dust precipitator is glass steel electrode, and cathode is titanium alloy electrode.
As one of embodiment, the water cooling tower is split type water cooling tower.
As one of embodiment, the circulation liquid pipeline of the water cooling tower and the circulation fluid of the second level scrubbing tower
Heat exchanger is equipped on pipeline, the heat exchanger is connected with cooling medium pipeline.
As one of embodiment, the first reflux branch is connected on the circulation liquid pipeline of the venturi scrubber, it is described
First reflux branch is connected to rinsing water collecting tank, and the spraying layer on the absorption tower is connected to the rinsing water collecting tank；
Be connected with the second reflux branch on the circulation liquid pipeline of the water cooling tower, the second reflux branch respectively with
The collecting pit of the venturi scrubber and rinsing water collecting tank connection；
Third reflux branch, the third reflux branch and institute are connected on the circulation liquid pipeline of the second level scrubbing tower
State the collecting pit connection of water cooling tower.
As one of embodiment, the second level scrubbing tower is packed tower.
The utility model embodiment at least has the following beneficial effects:
The flue gas of acid regeneration smoke processing system provided by the utility model, absorption tower discharge is introduced into spent acid scrubbing tower
In, by the spray of spent acid, the effect to flue gas ash removal can be played, moreover, having achieved the purpose that preheat spent acid, can be saved
Acid purification system operation energy consumption.Flue gas after the second level is washed discharges again after being dusted processing, fully removes in flue gas
Dust particle so that discharge flue gas meets the requirement of minimum discharge.Acid regeneration flue gas processing method provided in this embodiment,
Process is reasonable, and treated, and flue gas can reach more excellent discharge index, and the flue gas discharged has reached " disappearing white "
Effect eliminates the unhappy sense of psychology that traditional chimney generates the common people；Subsequently through exhaust gas fan gaseous mass (weight) and
Tolerance is all greatly decreased, and not only saves exhaust gas fan cost, and mitigates corrosion of the HCl to draught fan impeller, and extending impeller makes
Use the service life.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram for the acid regeneration smoke processing system that the utility model embodiment two provides；
Fig. 2 is the schematic view of the front view for the split type water cooling tower that the utility model embodiment three provides；
Fig. 3 is the overlooking structure diagram for the split type water cooling tower that the utility model embodiment three provides.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
Such as Fig. 1, the utility model embodiment provides a kind of acid regeneration flue gas processing method, includes the following steps:
Step 1, acid regeneration flue gas are sent into absorption tower 1 and carry out sour absorption after Venturi preconcentrator cools down；
Step 2, through treated on absorption tower 1, flue gas is sent into spent acid scrubbing tower 2, and spray spent acid is dusted place to flue gas
Reason, while spent acid is preheated, the spent acid of preheating, which can be sent, carries out waste acid concentration into preconcentrator；
Step 3 carries out first order carrying out washing treatment to through treated the flue gas of spent acid scrubbing tower 2, to remove the portion in flue gas
Divide dust and acid mist；
Step 4 carries out spraying cooling processing to the flue gas after the first order is washed；
Step 5, the flue gas after spraying cooling carry out second level carrying out washing treatment；
Step 6, the flue gas after the second level is washed discharge after being dusted processing.
Above-mentioned acid regeneration flue gas processing method, in step 3, first order carrying out washing treatment carries out in venturi scrubber 3,
The venturi scrubber 3 be preferably be venturi scrubber, washing effect is preferable, can sufficiently wash off dust in flue gas and
Acid mist.
Above-mentioned acid regeneration flue gas processing method, in step 4, spraying cooling processing carries out in water cooling tower 4, can be with
So that flue-gas temperature is greatly reduced, while can further remove the dust and acid mist in flue gas.
Above-mentioned acid regeneration flue gas processing method, in step 5, second level carrying out washing treatment carries out in second level scrubbing tower 5,
The dust and acid mist in flue gas can further be removed.
In above-mentioned acid regeneration flue gas processing method, flue gas passes through each treating column (absorption tower 1, spent acid scrubbing tower 2, text
Scrubbing tower 3, water cooling tower 4 and second level scrubbing tower 5 in mound) when can all generate certain temperature drop.Generally, acid regeneration flue gas
Temperature is reduced to 93~98 DEG C after Venturi preconcentrator, then, in the present embodiment, 93~98 DEG C of flue gas passes through each place
After managing tower processing, flue-gas temperature is gradually decreased, specifically:
In step 1,1 exit gas temperature of absorption tower is 85~87 DEG C；
In step 2, spent acid scrubbing tower exit gas temperature is 82~85 DEG C；
In step 3, venturi scrubber exit gas temperature is reduced to 80~81 DEG C；
In step 4, after spraying cooling, flue-gas temperature is reduced to 50~55 DEG C；
In step 5, after the second level is washed, flue-gas temperature is reduced to 45~50 DEG C.
Acid regeneration flue gas processing method provided in this embodiment, the flue gas that absorption tower 1 is discharged are introduced into spent acid scrubbing tower 2
In, by the spray of spent acid, the effect to flue gas ash removal can be played, moreover, having achieved the purpose that preheat spent acid, can be saved
Acid purification system operation energy consumption.Flue gas after the second level is washed discharges again after being dusted processing, fully removes in flue gas
Dust particle so that discharge flue gas meets the requirement of minimum discharge.Acid regeneration flue gas processing method provided in this embodiment,
Process is reasonable, and treated, and flue gas can reach more excellent discharge index, and the flue gas discharged has reached " disappearing white "
Effect eliminates the unhappy sense of psychology that traditional chimney 8 generates the common people；Subsequently through the gaseous mass (weight) of exhaust gas fan 9
It is all greatly decreased with tolerance, not only saves 9 cost of exhaust gas fan, and mitigate corrosion of the HCl to 9 impeller of blower, extend leaf
Take turns service life.
It is to be appreciated that it is equipped with spent acid spray unit in above-mentioned spent acid scrubbing tower 2, and to spray spent acid, spent acid spray
Unit can be used conventional arrangement jet pipe, specific structure in tower and not repeat herein；The spent acid spray unit is connected with
Spent acid is equipped with spent acid collecting pit for pipe, tower bottom, and the preheating spent acid of collection can be sent into the further concentration of Venturi preconcentrator
It is sent into spray roasting furnace afterwards.The spent acid scrubbing tower 2 is preferably packed tower, and under the action of filler, flue gas is filled with spent acid drop
Tap touching, the effect for removing dust in flue gas are preferable.In the present embodiment, after spent acid scrubbing tower 2, the temperature of spent acid can be from 50
~60 DEG C are increased to 80 DEG C or so.
In above-mentioned steps six, dust removal process carries out generally in deduster, in the present embodiment, it is preferable that using wet type electricity
Deduster 6 handles second level scrubbing tower exiting flue gas, wet electrical dust precipitator 6 to the treatment effect of the flue gas of the property compared with
It is good, the dust that can be effectively removed in flue gas, it is ensured that dust particles are stably maintained at minimum discharge in discharge flue gas
In range, avoid when spray roasting washes rifle as negative pressure fluctuation in furnace and caused by the exceeded situation of tail gas dust occur.
Preferably, above-mentioned wet electrical dust precipitator 6 uses tubular structure, anode (is preferably using glass steel material
Hexagon glass reinforced plastic anode tube), cathode uses titanium alloy electrode, and outer housing uses steel lining glue material matter or glass-lined steel steel
Matter.In the wet electrical dust precipitator 6, high voltage electric field makes dust and acid mist electrification in flue gas, forms charged ion, charged ion
To the electrode movement of opposite charges, charged ion discharges after reaching electrode, forms neutral dirt, mist particle, is deposited on electrode
On deposit rinsed out and periodically spraying water into electric precipitator.Wherein, the anode and titanium alloy material of glass steel material
Cathode line can prevent from being corroded by acid mist, guarantee that the wet electrical dust precipitator 6 reliablely and stablely works and improve the wet type
The service life of electric precipitator 6.In particular, acid regeneration flue gas processing method provided in this embodiment can will discharge flue gas temperature
At 45~50 DEG C, the desired operating temperatures perfection of this and the wet electrical dust precipitator 6 agrees with for degree control, and guarantee can to the effective of flue gas
By ground processing.
Further, such as Fig. 1, above-mentioned wet electrical dust precipitator 6 is preferably arranged in 5 top of second level scrubbing tower, without accounting for
With additional place, and reduce flue arrangement；Further, blowdown stack 8 is arranged in 6 top of wet electrical dust precipitator,
It is connected with the exhanst gas outlet of the wet electrical dust precipitator 6, further makes compact-sizedization, saves space occupied.
Generally, above-mentioned absorption tower 1, venturi scrubber 3, water cooling tower 4 and second level scrubbing tower 5 are all using circulation
Liquid spray, that is, be connected with circulation liquid pipeline.Preferably, such as Fig. 1, heat exchange processing is carried out to the circulation fluid of water cooling tower 4, more into
It says to one step, is cooled down to circulation fluid, remove the heat in smoke processing system, achieve the purpose that reduce flue-gas temperature,
Spraying cooling effect is promoted significantly, and so as to reduce the saturated vapor content in flue gas, HCl's is dense in reduction discharge flue gas
Degree reduces atmosphere pollution.Similarly, such as Fig. 1, the circulation fluid of second level scrubbing tower 5 is also cooled down, effect obtained this
Place does not repeat.By the heat exchange to system circulation liquid, compared with directly exchanging heat to flue gas, heat exchange efficiency is promoted, and
And it can be avoided the risk in flue gas heat-exchange unit 11 by iron powder blocking duct.
Above-mentioned acid regeneration flue gas processing method is advanced optimized, in step 4, using 4 pairs of split type water cooling tower literary mounds
In scrubbing tower exiting flue gas carry out spraying cooling processing, split type water cooling tower 4 imitates liquid, the cooling of gas compared with integral type
Fruit is more preferable, and distribution water is more advantageous, and the gas liquid reaction time is longer, and cooling effect is more preferable.The split type water cooling tower 4 it is specific
Structure will be explained in subsequent embodiment.
Embodiment two
The utility model embodiment provides a kind of acid regeneration smoke processing system, including sequentially connected by flue gas pipeline
Absorption tower 1, spent acid scrubbing tower 2, venturi scrubber 3, water cooling tower 4, second level scrubbing tower 5, dust-extraction unit and discharge cigarette
Chimney 8 is equipped with spent acid spray unit in the spent acid scrubbing tower 2.
It is to be appreciated that the spent acid spray unit being arranged in above-mentioned spent acid scrubbing tower 2 can be used and conventional arrange in tower
Jet pipe, specific structure do not repeat herein；The spent acid spray unit is connected with spent acid for pipe, and tower bottom is collected equipped with spent acid
Pond, the preheating spent acid of collection are sent into spray roasting furnace after being sent into the further concentration of Venturi preconcentrator.The spent acid is washed
Washing tower 2 to be preferably is packed tower, and under the action of filler, flue gas comes into full contact with spent acid drop, removes the effect of dust in flue gas
Fruit is preferable.In the present embodiment, after spent acid scrubbing tower 2, the temperature of spent acid can be increased to 80 DEG C or so from 50~60 DEG C.
Venturi scrubber is this field conventional equipment, and specific structure does not repeat herein, and washing effect is preferable, can be with
Sufficiently wash off the dust and acid mist in flue gas.
Above-mentioned water cooling tower 4 preferably uses split type water cooling tower 4, to 3 exiting flue gas of venturi scrubber
Spraying cooling processing is carried out, split type water cooling tower 4 is more preferable compared with cooling effect of the integral type to liquid, gas, distributes water
More advantageous, the gas liquid reaction time is longer, and cooling effect is more preferable.The specific structure of the split type water cooling tower 4 will be in subsequent reality
It applies in example and is explained.
Above-mentioned dust-extraction unit can be used conventional deduster, in the present embodiment, it is preferable that and it includes wet electrical dust precipitator 6,
Wet electrical dust precipitator 6 is preferable to the treatment effect of the flue gas of the property, the dust that can be effectively removed in flue gas, it is ensured that row
It puts dust particles in flue gas to be stably maintained in the range of minimum discharge, avoid when spray roasting washes rifle due to being born in furnace
Pressure fluctuation and caused by the exceeded situation of tail gas dust occur.
Wet electrical dust precipitator 6 is existing equipment, can be bought by market.In the present embodiment, preferably, above-mentioned wet type electricity removes
Dirt device 6 uses tubular structure, and anode uses glass steel material (being preferably hexagon glass reinforced plastic anode tube), and cathode uses
Titanium alloy electrode, outer housing use steel lining glue material matter or glass-lined steel steel material.In the wet electrical dust precipitator 6, high-voltage electricity
Field makes dust and acid mist electrification in flue gas, forms charged ion, electrode movement of the charged ion to opposite charges, charged ion
It discharges after reaching electrode, forms neutral dirt, mist particle, the deposit being deposited on electrode passes through periodically into electric precipitator
It sprays water and rinses out.Wherein, the cathode line of the anode of glass steel material and titanium alloy material can prevent from being corroded by acid mist, protect
Demonstrate,prove the service life that the wet electrical dust precipitator 6 reliablely and stablely worked and improved the wet electrical dust precipitator 6.In particular, this reality
The acid regeneration smoke processing system for applying example offer can remove most in flue gas after aforementioned reason tower processing
Dust simultaneously will discharge flue-gas temperature control at 45~50 DEG C, the desired operating temperatures perfection of this and the wet electrical dust precipitator 6 agrees with,
The work load of wet electrical dust precipitator 6 is also smaller, guarantees the effectively and reliably processing to flue gas.
Further, such as Fig. 1, above-mentioned wet electrical dust precipitator 6 is preferably arranged in 5 top of second level scrubbing tower, without accounting for
With additional place, and reduce flue arrangement；Further, blowdown stack 8 is arranged in 6 top of wet electrical dust precipitator,
It is connected with the exhanst gas outlet of the wet electrical dust precipitator 6, further makes compact-sizedization, saves space occupied.
In addition, such as Fig. 1, absorption tower 1, spent acid scrubbing tower 2, venturi scrubber 3, water cooling tower 4, second level scrubbing tower
5 tops are designed with liquid drop separator 7, are used for gas-liquid separation, the acid mist drop carried in flue gas are reduced, to reduce in flue gas
HCl concentration.The liquid drop separator 7 is vertical liquid drop separator 7, and inside uses wavy corrugated plating, and flase floor outer wall has
Thorn is hooked, for the drop in separating flue.
Advanced optimize the structure of above-mentioned acid regeneration smoke processing system, such as Fig. 1, the circulation fluid of the water cooling tower 4
Heat exchanger 11 is equipped on the circulation liquid pipeline of pipeline and the second level scrubbing tower 5, the heat exchanger 11 is connected with cooling
Medium pipeline.Circulation fluid is cooled down using heat exchanger 11, removes the heat in smoke processing system, reaching reduces flue gas temperature
The purpose of degree, spraying cooling effect and washing effect are promoted significantly, so as to reduce the saturated vapor content in flue gas,
The concentration for reducing HCl in discharge flue gas, reduces atmosphere pollution.By the heat exchange to system circulation liquid, directly changed with to flue gas
Heat is compared, and heat exchange efficiency is promoted, and can be avoided the risk in flue gas heat-exchange unit 11 by iron powder blocking duct.It is above-mentioned
Graphite heat exchanger 11 or heat exchanger 11 made of the metal material of hydrochloric acid corrosion resistant can be used in heat exchanger 11.
It is further preferred that it is connected with the first reflux branch on the circulation liquid pipeline of the venturi scrubber 3 such as Fig. 1,
The first reflux branch is connected to the spraying layer on the absorption tower 1；
The second reflux branch, the second reflux branch and institute are connected on the circulation liquid pipeline of the water cooling tower 4
State the collecting pit connection of venturi scrubber 3；
Be connected with third reflux branch on the circulation liquid pipeline of the second level scrubbing tower 5, third reflux branch with
The collecting pit of the water cooling tower 4 connects.
It is readily appreciated that ground, is equipped with circulating pump on above-mentioned each circulation liquid pipeline, each branch that flows back is all other to be connected to corresponding follow
On the outlet-side conduit of ring pump.In addition, the first reflux branch is connect with a collecting tank 12, which passes through pipeline such as Fig. 1
It is connect with the spraying layer on absorption tower 1；Collecting tank 12 can play the role of buffering, and the circulation fluid coordinated between each tower body is needed for amount
It asks, above-mentioned second reflux branch road may also set up other adapter tube and connect with the collecting tank 12.
In absorption tower 1, venturi scrubber 3, water cooling tower 4 and second level scrubbing tower 5, except second level scrubbing tower 5 by
Except external world's supplement desalted water, remaining tower moisturizing pumps branch level-one tower moisturizing forward by rear stage tower, specifically:
Before flue gas enters the absorption tower 1, first it is supplemented in the second level scrubbing tower 5 with desalted water, to described
After liquid level reaches setting value in second level scrubbing tower 5, start the circulating pump on the circulation liquid pipeline of the second level scrubbing tower 5,
Pass through 4 moisturizing of water cooling tower described in third reflux Zhi Luxiang；
After the liquid level in the water cooling tower 4 reaches setting value, start the circulation liquid pipeline of the water cooling tower 4
On circulating pump, pass through second reflux Zhi Luxiang described in 3 moisturizing of venturi scrubber；
After the liquid level in venturi scrubber 3 reaches setting value, start the circulation liquid pipeline of the venturi scrubber 3
On circulating pump, pass through first reflux Zhi Luxiang described in absorption tower 1 spraying layer infusion.
Based on above structure, can be caused under acid mist assimilation effect to avoid due to HCl excessive concentration in tower circulating liquid
Drop, reaches good environmental requirement；It is also possible to comprehensively utilize supplement water, achieve the purpose that water conservation.
In addition, such as Fig. 1, the exhaust gas fan 9 of the acid regeneration smoke processing system is preferably arranged in spray cold-zone tower and the
Between secondary scrubber 5, is arranged convenient for equipment, be all arranged in the second level especially for wet electrical dust precipitator 6 and blowdown stack 8
The structure at 5 top of scrubbing tower.Gas-liquid separation equipment, the gas-liquid separation are equipped between the exhaust gas fan 9 and second level scrubbing tower 5
Equipment can use horizontal liquid drop separator 5, be used for gas-liquid separation.
Embodiment three
The present embodiment provides a kind of split type water cooling towers 4, can be used in above-described embodiment one and embodiment two.
Such as Fig. 2 and Fig. 3, which includes the first tower body 401 and the second tower body 402 of left and right arrangement
(i.e. the two arranges in the horizontal direction), first tower body 401 is supported on ground by pedestal, then 401 bottom of the first tower body
Above 402 bottom of the second tower body；Spray unit is equipped in first tower body 401 and second tower body 402；
First tower body, 401 top is equipped with smoke inlet, and lower part is equipped with material outlet, the material outlet bottom and first
401 bottom of tower body is concordant, so that the material outlet can be used as exhanst gas outlet and the spray liquid outlet of first tower body 401；It is described
Second tower body, 402 bottom is equipped with collecting tank and top is equipped with exhanst gas outlet, is additionally provided with material inlet on the second tower body 402, the object
Expect that entrance between collecting tank and exhanst gas outlet, is connected between material inlet and material outlet by coupling tube 403 between tower；
Generally, the first tower body 401 and the second tower body 402 are cylindrical tower body；Preferably, coupling tube 403 between the tower
It is tangentially connected with the second tower body 402.
Flue gas enters from the smoke inlet on the first tower body 401, can be to flue gas by the spray unit in the first tower body 401
First time dedusting cooling processing is carried out, coupling tube 403 and second between the material outlet on the first tower body 401 of passing through under flue gas, tower
Material inlet on tower body 402 enters in the second tower body 402, carries out the to flue gas by the spray unit in the second tower body 402
Final dusting cooling processing.The spray liquid sprayed in first tower body 401 can be through the material outlet on the first tower body 401, mistake between tower
It crosses the material inlet on pipe 403 and the second tower body 402 to enter in the second tower body 402, and is collected by collecting tank, is recycled to,
It is recycled into two spray units.
Split type water cooling tower 4 provided in this embodiment, the structure arranged using two tower bodies or so, circular flow
It is divided into two parts and is sprayed into tower body, spraying cooling twice is carried out to flue gas, it is preferable to the cooling effect of liquid, gas, distribute water
It measures more advantageous；The gas liquid reaction time is longer, and cooling effect is more preferable.Since coupling tube 403 tangentially connects with the second tower body 402 between tower
It connects, flue gas tangentially enters in the second tower body 402, due to the effect of centrifugal force, gas-liquid separation may be implemented, and can play one
Fixed dustproof function.
It is further preferred that such as Fig. 3, from material inlet to material outlet direction, between tower, the sectional area of coupling tube 403 is gradually
Reduce, i.e., coupling tube 403 is in gradually-reducing shape structure between the tower, and coupling tube 403 and the cooperation of the second tower body 402 may make up a text between the tower
On the one hand structure in mound increases the speed that flue gas tangentially enters the second tower body 402, gas-liquid separation and dedusting is better achieved, separately
On the one hand, under Venturi effect, flue gas enters the disperse degree height after the second tower body 402, with the spray in the second tower body 402
The mixed effect of liquid is more preferable, and cooling effect and dust removing effects are more preferably.
Advanced optimize above-mentioned split type water cooling tower 4, in above-mentioned first tower body 401, spray unit is arranged in its top
Portion is located above smoke inlet；In second tower body 402, spray unit is disposed thereon portion, is located at below exhanst gas outlet.This reality
It applies in example, the spray unit in the first tower body 401 includes first jet 4011, which is 15 ° of nozzles, be can get
Preferably first cooling effect；Spray unit in second tower body 402 includes second nozzle 4021, which is 90 °
Nozzle guarantees the secondary cooling to flue gas；The axis of undoubtedly free burial ground for the destitute, first jet 4011 and second nozzle 4021 respectively with
First tower body, 401 axis and 402 axis of the second tower body are overlapped.The specific diameter of first tower body 401 and the second tower body 402 is according to place
Reason ability is different, can correspondingly be calculated design；In the present embodiment, it is preferable that the diameter of the first tower body 401 in 1m or so,
Control is within the scope of 0.8~1.5m；The diameter of second tower body 402 is within the scope of 1.5~1.8m, with above-mentioned first jet 4011
It is respectively cooperating with second nozzle 4021, guarantees the spraying cooling effect to flue gas.
It is further preferred that being equipped with smoke inlet pipe 4012, the axis of smoke inlet pipe 4012 at smoke inlet such as Fig. 2
It is sloped downwardly from its lateral outlet of its entrance, i.e., there is certain angle with horizontal plane, the mixing with spray liquid can be improved
Effect, in the present embodiment, which is 15 ° of inclination upwards.
In addition, being equipped with drainpipe such as Fig. 2 and Fig. 3 in 402 bottom of the second tower body, being emptied to collecting tank.
Two tower bodies, 402 side wall is equipped with access hole and overflow port, and specific structure does not repeat herein.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of acid regeneration smoke processing system, it is characterised in that: including passing through the sequentially connected absorption tower of flue gas pipeline, spent acid
Scrubbing tower, venturi scrubber, water cooling tower, second level scrubbing tower, dust-extraction unit and blowdown stack, the spent acid scrubbing tower
In be equipped with spent acid spray unit.
2. acid regeneration smoke processing system as described in claim 1, it is characterised in that: the dust-extraction unit includes that wet type electricity removes
Dirt device.
3. acid regeneration smoke processing system as claimed in claim 2, it is characterised in that: the anode of the wet electrical dust precipitator is
Glass steel electrode, cathode are titanium alloy electrode.
4. acid regeneration smoke processing system as described in claim 1, it is characterised in that: the water cooling tower is split type spray
Drench cooling tower.
5. acid regeneration smoke processing system as described in claim 1, it is characterised in that: the circulation liquid pipe of the water cooling tower
It is equipped with heat exchanger on the circulation liquid pipeline of road and the second level scrubbing tower, the heat exchanger is connected with cooling medium pipe
Road.
6. acid regeneration smoke processing system as claimed in claim 5, it is characterised in that:
The first reflux branch is connected on the circulation liquid pipeline of the venturi scrubber, the first reflux branch is connected to drift
Wash water collecting tank, the spraying layer on the absorption tower are connected to the rinsing water collecting tank；
Be connected with the second reflux branch on the circulation liquid pipeline of the water cooling tower, the second reflux branch respectively with it is described
The collecting pit of venturi scrubber and rinsing water collecting tank connection；
Third reflux branch, the third reflux branch and the spray are connected on the circulation liquid pipeline of the second level scrubbing tower
Drench the collecting pit connection of cooling tower.
7. acid regeneration smoke processing system as described in claim 1, it is characterised in that: the second level scrubbing tower is filler
Tower.
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|---|---|---|---|
| CN201822202238.9U CN209576218U (en) | 2018-12-26 | 2018-12-26 | Acid regeneration smoke processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822202238.9U CN209576218U (en) | 2018-12-26 | 2018-12-26 | Acid regeneration smoke processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620232A (en) * | 2020-12-10 | 2021-04-09 | 华菱安赛乐米塔尔汽车板有限公司 | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler |
-
2018
- 2018-12-26 CN CN201822202238.9U patent/CN209576218U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112620232A (en) * | 2020-12-10 | 2021-04-09 | 华菱安赛乐米塔尔汽车板有限公司 | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler |
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