CN205598949U - Coke oven smoke desulfurization system - Google Patents
Coke oven smoke desulfurization system Download PDFInfo
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- CN205598949U CN205598949U CN201620438969.1U CN201620438969U CN205598949U CN 205598949 U CN205598949 U CN 205598949U CN 201620438969 U CN201620438969 U CN 201620438969U CN 205598949 U CN205598949 U CN 205598949U
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- coke oven
- flue gas
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Abstract
The utility model discloses a coke oven smoke desulfurization system. Thereby mainly satisfy chimney heat and be equipped with and require and provide in order to reduce among the desulphurization process temperature drop of flue gas. The utility model discloses coke oven smoke desulfurization system includes spray -drying device, the dust collector who sets gradually according to the flue flow, spray -drying device's discharge end and dust collector's play dirt end have connected gradually desulfurization dust buffering cabin, soda regeneration pond through ash conveying pipe, the discharge end in soda regeneration pond is connected with gypsum dewatering device through defeated thick liquid pipeline, and gypsum dewatering device's collecting tank has connected gradually the soda through the infusion pipeline and has joined in marriage thick liquid pond, thick liquid buffer tank, and thick liquid buffer tank passes through the transfer line and is connected with spray -drying device. The utility model discloses coke oven smoke desulfurization system can show investment and the running cost that reduces the coke oven flue gas desulfurization to improve sweetener export flue -gas temperature, need not reheat and can satisfy chimney heat and be equipped with the requirement, scale deposit and the soda of having avoided the two alkaline processs of the wet -type simultaneously difficult scheduling problem of regenerating.
Description
Technical field
This utility model relates to a kind of coke oven flue gas desulphurization system.
Background technology
Sulfur dioxide is always the emphasis of China's emission reduction work as one of Air Pollutants.Along with environmental protection
That makes laws is the most perfect, and the increasingly stringent of environmental protection standard, the emission reduction work of sulfur dioxide has been achieved for necessarily
Progress, especially the atmosphere pollution control work of power industry is because starting relatively early, has electricity price to subsidize, subtracts
The effect of row has manifested.But start later coke oven smelting, Ferrous Metallurgy, building materials water at emission reduction work
The non-electrical industries such as mud, the reduction of discharging situation of atmosphere pollution is the severeest.The cigarette smelted in particular for coke oven
Road gas discharge, most enterprises not yet take any Mitigation options.According to " coking chemistry industrial pollutants
Discharge standard " requirement of (GB16171-2012), the concentration of emission of coking sulfur dioxide of flue gases to reach
50mg/Nm3Just can meet the requirements, special limit value regional requirements reaches 30mg/Nm3.The discharge mark of high request
What the contradiction between accurate and severe pollution situation embodied is lacking of the ripe desulfurization technology for flue gases of cock oven
Weary.
Flue gases of cock oven has the feature of many self so that conventional calcium method desulfurization is difficult to meet desulfurization requirement.
On the one hand standard-required is high, needs sulfur removal technology to have higher desulfuration efficiency；On the other hand coke oven chimney enters
Mouth flue-gas temperature requires high (＞ 130 DEG C), it is desirable to desulphurization system has the least smoke temperature drop.Coke oven is normal
The hot pressing suction that power needed for production produces from coke oven chimney, flue-gas temperature is to produce the root of hot pressing suction
This factor.Flue gases of cock oven residual neat recovering system exit gas temperature is 150-180 DEG C, and its exiting flue gas is direct
Enter chimney and can meet the requirement of chimney generation hot pressing suction.But cigarette can be affected after being the increase in desulphurization system
The suction of gas and negative-pressure balancing, and desulphurization plant exit gas temperature is usually no more than 100 DEG C, it is impossible to meet Jiao
The equipment requirements of stove chimney, it is impossible to realize the flue gas urgent switching under system fault condition.This just requires to take off
Sulfur technique has the lowest smoke temperature drop so that the flue-gas temperature of chimney porch reaches more than 130 DEG C.
For these problems, the coke that CN103877856A proposes to utilize coal chemical enterprise self-produced is in flue gas
SO2 carries out adsorbing and removing, and this method can ensure that and realizes flue gases of cock oven under the conditions of relatively low smoke temperature drop
Purify, but due to the self-produced less limited sorption capacity of coke ratio surface area in coke-oven plant, need to be continuously replenished
A large amount of fresh coke could meet SO2 emission request, and the coke lost efficacy its absorption during downstream utilizes
SO2 will discharge, simply achieve the transfer of SO2 discharge, really do not realize SO2Subtract
Row.CN101874975 discloses a kind of double-alkaline semi-dry sulfur removal technology, but this method is at conventional lime
The absorbent of dry desulfurizing process is mixed into a certain proportion of sodium hydroxide, desulfurization can be improved to a certain extent
Efficiency, but owing to soda can not regenerate, also significantly increase operating cost.This method is still main with calcium simultaneously
Alkali does absorbent, is difficult to relatively low smoke temperature drop while meeting desulfuration efficiency.The most existing maturation
Double alkali method desulfurizing technology be wet processing, flue gas exit temperature is low, and easily goes out during serum recycle
The deposition of existing calcium sulfate and obstruction, cannot meet the desulfurization requirement of flue gases of cock oven equally.
Utility model content
For the problems referred to above, this utility model provides a kind of relatively low smoke temperature drop, meets the hot standby requirement of chimney
Coke oven flue gas desulphurization system.
For reaching above-mentioned purpose, this utility model one coke oven flue gas desulphurization system, described system includes by cigarette
Spray-drying installation that road flow process sets gradually, dust arrester, the discharge end of described spray-drying installation and removing
The dirt end that goes out of dirt device is connected with desulfurization dust buffering chamber, soda regenerated reactor in turn by ash conveying pipe, described
The discharge end of soda regenerated reactor is connected with gypsum dewatering equipment by stock line, described gypsum dewatering equipment
Collecting tank is connected with soda pond with slurry, serosity buffer tank in turn by infusion pipeline, and described serosity buffer tank leads to
Cross tube for transfusion to be connected with described spray-drying installation.
Further, described spray-drying installation includes being spray-dried tower body, and described tower body is provided with atomization
Device, the lower end of described tower body is provided with hopper, and described dedusting collection device includes the flue gas ash removal being vertically connected with
The ash silo of the dust that parts and collecting dust-removing parts are removed；
The lower end of described hopper and the lower end of described ash silo are cached with described desulfurization dust by pneumatic ash conveying pipe
Storehouse connects, and described serosity buffer tank is connected with described nebulizer by tube for transfusion.
Further, described soda regenerated reactor is provided with agitating device.
Further, the nozzle of described nebulizer is air flow type jet nozzle, pressure nozzle；
Described dust arrester is cyclone dust extractor, electric cleaner, sack cleaner or electrostatic fabric filter.
Further, described gypsum dewatering equipment is eddy flow dehydrator, vacuum belt dewaterer or eddy flow dehydration
Device and the combination of vacuum belt dewaterer.
Further, described soda regenerated reactor is provided with slurry feeding pump, the collection of described gypsum dewatering equipment
The infusion pipeline between infusion pipeline, soda pond with slurry and soda pond with slurry between liquid bath and soda pond with slurry
And it is respectively provided with anti-corrosion water pump on the infusion pipeline of described serosity buffer tank and described spray-drying installation.
This utility model coke oven flue gas desulphurization system uses double alkali half dry type that flue gas carries out desulfurization: to from sodium
The soda solution in alkali pond with slurry is sufficiently mixed with flue gas after being atomized by spray-drying installation, simultaneously soda and cigarette
SO in gas2The generation sulphite that reacts makes flue gas be purified；In course of reaction contained by soda droplet
Moisture is constantly evaporated so that the sulphite of generation finally enters dedusting with the form of dry powder with flue gas
Device；Desulfurization dust contained in flue gas in dust arrester is captured, and reacts the most completely in dust simultaneously
Soda can also be with the SO in flue gas2Reaction further, improves the desulfurized effect of system；Go out from dust arrester
The flue gas come reaches discharge standard, and temperature ＞ 130 DEG C, directly discharges through coke oven chimney.
The desulfurization dust of dust arrester capture enters desulfurization dust buffering chamber through ash-transmission system, in case regeneration；
Desulfurization dust in desulfurization dust buffering chamber can obtain after being sufficiently mixed with calcium aqueous slkali in soda regenerated reactor
Soda and the mixed serum of desulfurated plaster must be contained；Mixed serum is sent to gypsum dewatering equipment, takes off at Gypsum Fibrosum
In water device, Gypsum Fibrosum separates with soda, and Gypsum Fibrosum processes as the final products outward transport of desulfurization, the sodium that regeneration obtains
Aqueous slkali continues circulation desulfurization after entering soda pond with slurry and supplementing fresh soda.
Coke oven flue gas desulphurization system compared with prior art, has a following advantage:
1) compared to calcium method desulfurization, soda solution is as desulfurizing agent and SO2Reaction rate is fast, and whitewashing amount is little,
Gas residence time requires short.So on the one hand, the volume of reaction tower can be reduced, greatly reduce the throwing of system
Money cost, on the other hand can obtain less smoke temperature drop and higher desulfuration efficiency.When concentration does not surpasses
Crossing 500mg/Nm3, when desulfuration efficiency is more than 90%, the smoke temperature drop of this technique is less than 20 DEG C, desulfurization system
System exit gas temperature can meet the hot standby requirement of coke oven chimney.
2) compared to wet type double alkali method desulfurizing technology, whole sweetening process is carried out, no under conditions of half dry state
Only can improve flue gas exit temperature, it is thus also avoided that the fouling that wet type double alkali method desulfurizing technology often occurs is blocked
Problem；And in order to reduce the fouling obstruction of system in wet type Dual alkali soda regenerative process, avoid calcium alkali as far as possible
Excess, result causes soda regeneration insufficient, adds operating cost.This utility model coke oven flue gas desulfurization
System, in order to ensure the abundant regeneration of soda, can be always ensured that in regenerated reactor the calcium alkali having excess, residual
Small part calcium alkali and the SO in flue gas2The CaSO generated after reaction3Hard scale can't be formed in cyclic process,
But can be removed in time in regenerated reactor product dehydration.
To sum up, this utility model coke oven flue gas desulphurization system, it is possible not only to meet the ring of coke oven flue desulfurization
The hot standby requirement of chimney that guaranteed request and coke oven normally produce, has investment, operating cost low, system simultaneously
The plurality of advantages such as stable.
Accompanying drawing explanation
Fig. 1 is the process chart of embodiment 1 coke oven flue gas desulfurizer.
Detailed description of the invention
Below in conjunction with Figure of description, this utility model is further described.
Embodiment 1
The present embodiment coke oven flue gas desulfurizer includes spray drying tower 1, sack cleaner 2, and desulfurization dust delays
Storage 3, soda regenerated reactor 4, vacuum belt dewaterer 5, soda pond with slurry 6, serosity buffer tank 7.
Being connected by flue between spray drying tower 1 and sack cleaner 2, described spray drying tower 1 includes
Being spray-dried tower body, described tower body arranges rotary sprayer 8, the lower end of described tower body is provided with hopper, institute
State flue gas ash removal parts that sack cleaner 2 includes being vertically connected with and the ash of the dust that collecting dust-removing parts are removed
Storehouse, the ash silo of sack cleaner 2 and the hopper of spray drying tower 1 are respectively by pneumatic ash conveying pipe and desulfurized powder
Dirt buffering chamber 3 connects.Between desulfurization dust buffering chamber 3 and soda regenerated reactor 4 by pneumatic ash conveying pipe even
Connect.There is agitating device in soda regenerated reactor 4 and be furnished with slurry feeding pump, being dehydrated with vacuum belt by pipeline
Machine 5 is connected；The collecting tank of vacuum belt dewaterer 5, soda pond with slurry 6, serosity buffer tank 7 and rotation
Pass sequentially through anti-corrosion water pump between aerosol apparatus 8 and pipeline connects.
The present embodiment coke oven flue gas desulfurizer, the nozzle of the rotary sprayer that spray drying tower is arranged can be adopted
With air flow type jet nozzle, pressure nozzle；Flue gas enters spray-drying installation, can connect with soda droplet following current
Touch, counter current contacting or cross-flow contact.
The sack cleaner of the present embodiment coke oven flue gas desulfurizer can select cyclone dust extractor, electric cleaner,
Electrostatic fabric filter etc..
The vacuum belt dewaterer 5 of the present embodiment coke oven flue gas desulfurizer can also select eddy flow dehydrator or vacuum
Belt dewaterer and the combination of eddy flow dehydrator.
The present embodiment coke oven flue gas desulphurization system can significantly reduce the investment of coke oven flue desulfurization and run into
This, and improve desulphurization plant exit gas temperature, it is not necessary to reheating can meet the hot standby requirement of chimney, keeps away simultaneously
Fouling and the soda of having exempted from wet type Dual alkali regenerate the problems such as difficulty.
The work technological process of the present embodiment coke oven flue gas desulfurizer is:.
Temperature is 180 DEG C, SO2Concentration is 300mg/Nm3Flue gases of cock oven from flue gas distributor 9 enter spray
Mist drying tower 1, with the droplet co-current contact of the soda bath sprayed into by rotary sprayer 8.Spray in tower
Soda bath concentration be the design load of 20wt%, Na2/S mol ratio be 1.05, flue gas is at dwell time in the tower
Design load is 5s, and the mean flow rate of tower inner boundary is 0.3m/s, and the mean diameter of soda bath droplet controls model
Enclosing is 60～80 μm.Major part sodium hydroxide generates sodium sulfite also after Ta Nei reacts with sulfur dioxide
It is dried to the Desulphurization of solid-state.This Desulphurization together enters sack cleaner 2 in company with flue gas and is captured.
In sack cleaner 2, unreacted sodium hydroxide completely further with the SO in flue gas2Reaction, improves
Gas cleaning efficiency.From sack cleaner 2 flue gas SO out2Concentration is less than 30mg/Nm3, flue-gas temperature
More than 150 DEG C, directly through the former smoke stack emission of coke oven after booster fan supercharging.
The Desulphurization of spray drying tower 1 bottom hopper deposition and the dedusting ash of sack cleaner 2 trapping are passed through
Pneumatic conveying pipeline is transported to desulfurization dust buffering chamber 3.Desulphurization in buffering chamber 3 be periodically transported to containing
In the soda regenerated reactor 4 of 20% Calx serosity, it is transported to vacuum belt by the mixed serum after being sufficiently stirred for
Dewaterer 5 carries out vacuum dehydration.Produce desulfurated plaster outward transport process, it is thus achieved that sodium hydroxide regenerated liquid defeated
Deliver to soda pond with slurry 6, and supplement fresh sodium hydroxide wherein, make the concentration of sodium hydroxide reach 20wt%.
The serosity prepared is sprayed into spray drying tower 1 through the buffering of serosity buffer tank 7 by rotary sprayer 8, it is achieved sodium
The regeneration of alkali and circulation desulfurization.
This utility model coke oven flue gas desulphurization system, the set point of the mol ratio of Na2/S can be 0.9～1.5,
Further can be preferably 1.0～1.2；The adjusting range of the soda mass fraction in soda pond with slurry is ＜
30%.Require that adjustment sprays into the soda mass fraction of serosity, when requiring smoke temperature drop relatively low according to smoke temperature drop
Use higher soda mass fraction, reduce whitewashing amount, when smoke temperature drop can higher time, use relatively low
Soda mass fraction, improves whitewashing amount.
This utility model coke oven flue gas desulphurization system, the smoke inlet temperature of spray-drying installation is less than
200 DEG C, further can be preferably 160～180 DEG C；The flue gas time of staying in spray-drying installation is
3～12s, further can be preferably 5～8s；Flue gas speed in spray-drying installation body cross-section is little
In 1m/s, further it is preferably 0.2～0.4m/s；The mean diameter of the soda droplet that spray-drying installation produces
Scope is ＜ 200 μm, further can be preferably 50～100 μm
This utility model coke oven flue gas desulphurization system, soda can be sodium hydroxide, sodium carbonate, sodium bicarbonate
In one or several mixture, calcium alkali can be with calcium oxide, calcium hydroxide and mixture thereof.
In this utility model coke oven flue gas desulphurization system, the calcium alkali in regenerated reactor adds in form of slurry, calcium
The mass fraction scope of alkali serosity is 5～30%, further can be preferably 20%；Sodium sulfite is with dry state
The form of powder or solution is added, and the calcium base excess being always ensured that in regenerated reactor.
Water content ＜ 20% of the desulfurated plaster that this utility model coke oven flue gas desulphurization system obtains.
Above, preferred embodiment the most of the present utility model, but protection domain of the present utility model does not limit to
In this, any those familiar with the art, can be light in the technical scope that this utility model discloses
The change being readily conceivable that or replacement, all should contain within protection domain of the present utility model.Therefore, this practicality
Novel protection domain should be as the criterion with the protection domain that claim is defined.
Claims (6)
1. a coke oven flue gas desulphurization system, it is characterised in that: described system includes setting successively by flue flow process
The spray-drying installation put, dust arrester, the discharge end of described spray-drying installation and dust arrester go out dirt
End is connected with desulfurization dust buffering chamber, soda regenerated reactor in turn by ash conveying pipe, described soda regenerated reactor
Discharge end is connected with gypsum dewatering equipment by stock line, and the collecting tank of described gypsum dewatering equipment is by defeated
Liquid pipeline is connected with soda pond with slurry, serosity buffer tank in turn, and described serosity buffer tank passes through tube for transfusion and institute
State spray-drying installation to connect.
Coke oven flue gas desulphurization system the most according to claim 1, it is characterised in that: described spray drying
Device includes being spray-dried tower body, and described tower body is provided with nebulizer, and the lower end of described tower body is provided with material
Bucket, described dedusting collection device includes the ash that the flue gas ash removal parts being vertically connected with and collecting dust-removing parts are removed
The ash silo of dirt；
The lower end of described hopper and the lower end of described ash silo are cached with described desulfurization dust by pneumatic ash conveying pipe
Storehouse connects, and described serosity buffer tank is connected with described nebulizer by tube for transfusion.
Coke oven flue gas desulphurization system the most according to claim 1, it is characterised in that: described soda regenerates
Pond is provided with agitating device.
Coke oven flue gas desulphurization system the most according to claim 2, it is characterised in that: described nebulizer
Nozzle is air flow type jet nozzle, pressure nozzle；
Described dust arrester is cyclone dust extractor, electric cleaner, sack cleaner or electrostatic fabric filter.
Coke oven flue gas desulphurization system the most according to claim 1, it is characterised in that: described gypsum dehydration
Device is eddy flow dehydrator, vacuum belt dewaterer or eddy flow dehydrator and the combination of vacuum belt dewaterer.
Coke oven flue gas desulphurization system the most according to claim 1, it is characterised in that: described soda is again
Raw pond is provided with slurry feeding pump, defeated between the collecting tank of described gypsum dewatering equipment and soda pond with slurry
Infusion pipeline between liquid pipeline, soda pond with slurry and soda pond with slurry and described serosity buffer tank are with described
Anti-corrosion water pump it is respectively provided with on the infusion pipeline of spray-drying installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438969.1U CN205598949U (en) | 2016-05-12 | 2016-05-12 | Coke oven smoke desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438969.1U CN205598949U (en) | 2016-05-12 | 2016-05-12 | Coke oven smoke desulfurization system |
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| CN205598949U true CN205598949U (en) | 2016-09-28 |
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| CN201620438969.1U Active CN205598949U (en) | 2016-05-12 | 2016-05-12 | Coke oven smoke desulfurization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944536A (en) * | 2016-05-12 | 2016-09-21 | 中冶华天工程技术有限公司 | Coke oven flue gas desulfurization technology and system |
| CN112044345A (en) * | 2020-09-22 | 2020-12-08 | 马鞍山奥柯环保科技发展有限公司 | Novel SDA desulfurizing tower bed charge cyclic utilization system |
-
2016
- 2016-05-12 CN CN201620438969.1U patent/CN205598949U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944536A (en) * | 2016-05-12 | 2016-09-21 | 中冶华天工程技术有限公司 | Coke oven flue gas desulfurization technology and system |
| CN112044345A (en) * | 2020-09-22 | 2020-12-08 | 马鞍山奥柯环保科技发展有限公司 | Novel SDA desulfurizing tower bed charge cyclic utilization system |
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Effective date of registration: 20220621 Address after: 243000 Fu Chang Industrial Park, 259 HSI Nan Road, Ma'anshan economic and Technological Development Zone, Anhui Patentee after: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee after: HUATIAN NANJING ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: 243005 Hunan West Road, Ma'anshan, Ma'anshan, Anhui Patentee before: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee before: MCC HUATIAN (ANHUI) ENERGY SAVING ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. |