CN107413190A - The method and its application of particulate matter, sulfur vapor and sulfur dioxide in separating flue - Google Patents
The method and its application of particulate matter, sulfur vapor and sulfur dioxide in separating flue Download PDFInfo
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- CN107413190A CN107413190A CN201710637618.2A CN201710637618A CN107413190A CN 107413190 A CN107413190 A CN 107413190A CN 201710637618 A CN201710637618 A CN 201710637618A CN 107413190 A CN107413190 A CN 107413190A
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- flue gas
- particulate matter
- sulfur
- flue
- sulfur vapor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/021—Separation of sulfur from gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/56—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of method of particulate matter, sulfur vapor and sulfur dioxide in separating flue.The gas that the flue gas is made up of caused by the calcium sulfate in sulphur content solution gypsum byproduct particulate matter, sulfur vapor and sulfur dioxide, the described method comprises the following steps：1) flue gas is filtered using film filter, filtration temperature >=300 DEG C, filtration velocity is 0.5 2.0m/min；Particulate matter in the flue gas is retained by the filter medium of the film filter, and the filter medium of the flue gas through the film filter obtains the first flue gas, dustiness≤10mg/Nm in first flue gas3；2) first flue gas is made to be condensed by the condenser that condensation temperature is 100 200 DEG C, the sulfur vapor, first flue gas obtains the second flue gas through the condenser, sulfur vapor concentration≤100mg/Nm in second flue gas3.This method can efficiently separate particulate matter in flue gas, sulfur vapor and sulfur dioxide, and the rate of recovery is high and purity is high.
Description
Technical field
The present invention relates to the technical field of processing flue gas as caused by sulphur decomposing gypsum accessory substance, specifically, relate to
And in separating flue particulate matter, sulfur vapor and sulfur dioxide method and its application.
Background technology
China's gypsum byproduct (such as ardealite, desulfurated plaster, fluorgypsum, anhydrite or nickel gypsum) discharge capacity is very big, real
Turning waste into wealth for existing gypsum byproduct waste residue, reduces environmental pollution, and is to belong to the energy-conservation for having very much economic value and social value to drop
Consumption environment protection technology.Contain substantial amounts of calcium sulfate in gypsum byproduct, using sulphur as reducing agent, sulfuric acid can be made at high temperature
Calcium high temperature thermal decomposition is calcium oxide and sulfur dioxide, obtains can be used for the high-concentration sulfur dioxide gas of production sulfuric acid and can use
In the solid slag for preparing cement.
In order to improve the conversion ratio of gypsum byproduct, the addition of reducing agent sulphur must be excessive, therefore, from reacting furnace
Both contain particulate matter (the less calcium oxide of particle) in flue gas out, contain unreacted sulfur vapor again, therefore, to expect
More pure sulfur dioxide gas, follow-up workshop section must carry out cooling recovery to the sulfur vapor in flue gas and particulate matter.
And how to reclaim the high concentration sulfur vapor in dust-laden heat smoke is that whole sulphur decomposing gypsum accessory substance prepares sulfuric acid
One of key technology of technology.Because flue-gas temperature is higher and has very strong corrosivity, therefore existing separation method leads to
The treatment technology being combined frequently with condensation and trapping.For example, a kind of return is disclosed in Chinese invention patent CN103818882A
The method for receiving the sulfur vapor in dust-laden heat smoke, as shown in figure 1, this method includes successively containing high temperature in two condensers 2
Cloud of dust gas is condensed to reclaim molten sulfur twice, the molten sulfur that then sprinkling has been collected by described two condensers 2 in trapping tower 5
Carry out trap particulate matter.But this method has the following disadvantages：
1) molten sulfur by first two sections condensation recovery is used for dedusting, and the molten sulfur containing a large amount of particulate matters can not be back to instead again
Answer stove；
2) substantial amounts of particulate matter is mixed in the molten sulfur finally given, later separation cost is higher and separation is difficult；
3) flue-gas temperature and the temperature difference of condenser 2 are huge, cause the waste of heat and power consumption is higher；
4) condensed in two stages, complex process and cost height are used；
5) due to entrained particulate in condensation molten sulfur, therefore necessarily pipeline blockage is caused, it is necessary to periodic cleaning pipeline and clear
Reason is difficult.
The content of the invention
It is a primary object of the present invention to provide the method for particulate matter in separating flue, sulfur vapor and sulfur dioxide and its answer
With, with solve in the prior art complex process, particulate matter, sulfur vapor and sulfur dioxide can not be efficiently separated and less economical ask
Topic.
To achieve these goals, according to an aspect of the invention, there is provided particulate matter, sulphur steam in a kind of separating flue
The method of gas and sulfur dioxide.Flue gas in the separating flue in the method for particulate matter, sulfur vapor and sulfur dioxide is sulphur content solution
The gas being made up of caused by calcium sulfate in gypsum byproduct particulate matter, sulfur vapor and sulfur dioxide, methods described bag
Include following steps：
1) flue gas is filtered using film filter, filtration temperature >=300 DEG C, filtration velocity 0.5-2.0m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter, and the flue gas passes through the film filter
Filter medium obtain the first flue gas, dustiness≤10mg/Nm in first flue gas3；
2) first flue gas is made to be condensed by the condenser that condensation temperature is 100-200 DEG C, the sulfur vapor, institute
State the first flue gas and obtain the second flue gas through the condenser, sulfur vapor concentration≤100mg/Nm in second flue gas3。
Compared with prior art, in separating flue of the invention the method for particulate matter, sulfur vapor and sulfur dioxide technique
Simply and have the advantages that：
1) first using can resistant to elevated temperatures film filter flue gas is filtered so that the particulate matter in flue gas is extracted
Out, these particulate matters can be used for preparing high carbonate-free lime, special cement etc.；Make filtration temperature >=300 DEG C, it can be ensured that cigarette
Sulfur vapor in gas keeps preferable mobility, avoids the filter medium of film filter from occurring to block and lifted the rate of filtration；Institute
It is flowing velocity of the flue gas in film filter to state filtration velocity, when filtration velocity is 0.5-2.0m/min, can be used
Less filter area and relatively low filter pressure, better economy；When after the filtering of the film filter, the temperature of flue gas
Degree can be reduced further, so as to reduce the efficiency of subsequent condensation；
2) due to dustiness≤10mg/Nm in the first flue gas3, therefore, the second flue gas can be made only with once condensation
In sulfur vapor condensation, obtain sulfur vapor concentration≤100mg/Nm3The second flue gas；Because the temperature of the first flue gas has been compared
Reduced much in the temperature of flue gas, therefore the power consumption of condenser is remarkably decreased；Condensation temperature is controlled at 100-200 DEG C, can be with
Sulfur vapor condensation is set to be changed into the preferable molten sulfur of mobility and be unlikely to solidify；The dustiness is the concentration of the particulate matter.
3) the method technique of particulate matter, sulfur vapor and sulfur dioxide is simple in separating flue of the invention, not only effectively returns
The sulfur vapor in flue gas is received, and avoids and condenses asking for entrained particulate and caused pipeline blockage in molten sulfur in the prior art
Topic；
4) material separation, purification, the synchronous progress of purification, have efficiently separated particulate matter in flue gas, sulfur vapor and sulfur dioxide
And the rate of recovery height and purity of each component are high, sulfur vapor and particulate matter can be utilized rationally again, make returning for gypsum byproduct
Receive to utilize and there is excellent economic benefit.
Further, the filtration temperature is 300-500 DEG C；To the cigarette before being additionally included in into the film filter
Gas is cooled.Thus, it is possible to the heat in recovered flue gas, extend the service life of film filter.Before filtration or filter
Cooled afterwards, but before filtration cooling can extend filter medium service life, reduce heat loss and
Lift cooling rate.
Further, the filtration temperature is 350-450 DEG C.Thus, economic benefit is best.
Further, the material of the filter medium is intermetallic compound, cermet or metal alloy.Thus, mistake
Filter medium has excellent decay resistance, service life length.
Further, the aperture of the filter medium is 10-30 μm, air flux >=300m3/m2·kPa·h.Thus, make
Filter medium is obtained to have higher air flux concurrently and there is higher rejection to the particulate matter in flue gas.
Further, the condensation temperature is 120-140 DEG C.Thus, the first flue gas within the condenser fit by residence time
Preferably, condensation effect is good, and the rate of recovery of sulphur is high, and production efficiency is high, good in economic efficiency.
Further, the filtration velocity is 0.9-1.6m/min.Filtration velocity is too high, the filtering under identical filter area
Resistance is bigger；Filtration velocity is too low, and the filter area handled needed for identical flue gas volume is bigger, and the volume of film filter is bigger；
Above two situation all directly affects cost；When the filtration velocity is 0.9-1.6m/min, economic benefit is optimal.
Further, the gypsum byproduct is ardealite, desulfurated plaster, fluorgypsum, anhydrite or nickel gypsum.These stones
Contain substantial amounts of calcium sulfate in cream accessory substance, using the side of particulate matter, sulfur vapor and sulfur dioxide in the separating flue of the present invention
Method is applied to the recycling of these gypsum byproducts, has very high economic benefit and the feature of environmental protection.
Further, also contain in the flue gas relative to the inert inert gas of the sulfur vapor；The indifferent gas
Body is N2And/or CO2.Thus, the mobility of sulfur vapor is lifted.
To achieve these goals, according to another aspect of the present invention, a kind of recycling of ardealite is additionally provided
Method, including using the method for particulate matter, sulfur vapor and sulfur dioxide in above-mentioned separating flue to handle sulphur and ardealite anti-
Answer produced flue gas.
The solid waste discharged when ardealite is Wet-process Phosphoric Acid Production, 1 phosphoric acid by wet process is often produced (with 100%P2O5
Meter) about produce 5-6t ardealites (butt)；In recent years, with the continuous development of Phosphate Fertilizer Industry, the discharge capacity of ardealite also with day
All to increase, for China's by-product ardealite annual emissions in 2013 more than 70,000,000 t, ardealite in 2014 has increased by 8.6% on a year-on-year basis, but
Its comprehensive utilization ratio about 30%, substantial amounts of ardealite are handled using stockyard stacking, and this not only occupies a large amount of soils, pollution
Soil and water resources, return manufacturing enterprise and bring larger financial burden；By the present invention separating flue in particulate matter, sulfur vapor and
The method of sulfur dioxide is applied to the recycling of ardealite, has very high economic benefit and the feature of environmental protection.
It can be seen that the technique of the method for particulate matter, sulfur vapor and sulfur dioxide is very simple in separating flue of the invention, collection
Material separation, purification, purification are integrated, and have efficiently separated time of particulate matter in flue gas, sulfur vapor and sulfur dioxide and each component
High income and purity height, sulfur vapor and particulate matter can be utilized rationally again.By particulate matter, sulphur in the separating flue of the present invention
When the method for steam and sulfur dioxide is applied to the recycling of ardealite, simple transformation is carried out to existing equipment to be made
The remarkable in economical benefits lifting that ardealite recycles.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent
Point will be set forth in part in the description, and partly will become apparent from the description below, or the practice by the present invention
Solve.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for aiding in the understanding of the present invention, content provided in accompanying drawing and its
Explanation relevant in the present invention can be used for explaining the present invention, but not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram for reclaiming the method for sulfur vapor in dust-laden heat smoke in the prior art.
Fig. 2 is the schematic diagram of the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue of the present invention.
Relevant mark in above-mentioned accompanying drawing for：
1：Film filter；
2：Condenser；
3：Reacting furnace；
4：Heat reclaim unit；
5：Trap.
Embodiment
Clear, complete explanation is carried out to the present invention below in conjunction with the accompanying drawings.Those of ordinary skill in the art are based on these
The present invention can be realized in the case of explanation.Before with reference to accompanying drawing, the present invention will be described, it is necessary to it is emphasized that：
Technical scheme and technical characteristic in the present invention provided in each several part including the description below, do not rushing
In the case of prominent, these technical schemes and technical characteristic can be mutually combined.
In addition, the embodiments of the invention being related in the description below are generally only the embodiment of a branch of the invention, and
The embodiment being not all of.Therefore, creativeness is not being made based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained on the premise of work, should all belong to the scope of protection of the invention.
On term in the present invention and unit.Term in description and claims of this specification and relevant part
" comprising ", " having " and their any deformation, it is intended that cover non-exclusive include.Term " air flux " refers to every kPa
Under filter pressure per hour under every square metre of filter area air infiltration capacity.Unit " Nm3" implication be standard cubic meter.
Embodiment 1
As shown in Fig. 2 the method for particulate matter, sulfur vapor and sulfur dioxide includes following step in the separating flue of the present invention
Suddenly：
1) flue-gas temperature is down to 350 DEG C using heat reclaim unit 4, wherein, the flue gas is sulfur vapor and ardealite
The gas being made up of caused by reaction particulate matter, sulfur vapor and sulfur dioxide；
2) flue gas after cooling is filtered using film filter 1, filtration temperature is 300 DEG C, filtration velocity 0.5m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter 1, and the flue gas passes through the membrane filtration
The filter medium of device 1 obtains the first flue gas；The material of the filter medium is intermetallic compound, and aperture is 10 μm, air flux
For 300m3/m2·kPa·h；
3) making first flue gas, the sulfur vapor condenses, described by the condenser 2 that condensation temperature is 100 DEG C
First flue gas obtains the second flue gas through the condenser 2.
Dustiness in the flue gas of gained first is 2.3mg/Nm3, the particulate matter rate of recovery is 99.5%, the sulphur in the second flue gas
Vapor concentration is 25mg/Nm3, the rate of recovery of sulfur vapor is 99.7%.
Embodiment 2
As shown in Fig. 2 the method for particulate matter, sulfur vapor and sulfur dioxide includes following step in the separating flue of the present invention
Suddenly：
1) flue-gas temperature is down to 400 DEG C using heat reclaim unit 4, wherein, the flue gas is excessive sulfur vapor and phosphorus
The gas being made up of caused by gypsum reaction particulate matter, sulfur vapor and sulfur dioxide；
2) flue gas after cooling is filtered using film filter 1, filtration temperature is 350 DEG C, filtration velocity 0.9m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter 1, and the flue gas passes through the membrane filtration
The filter medium of device 1 obtains the first flue gas；The material of the filter medium is intermetallic compound, and aperture is 15 μm, air flux
For 480m3/m2·kPa·h；
3) making first flue gas, the sulfur vapor condenses, described by the condenser 2 that condensation temperature is 120 DEG C
First flue gas obtains the second flue gas through the condenser 2.
Dustiness in the flue gas of gained first is 4.1mg/Nm3, the particulate matter rate of recovery is 99%, and the sulphur in the second flue gas steams
Gas concentration is 42mg/Nm3, the rate of recovery of sulfur vapor is 99%.
Embodiment 3
As shown in Fig. 2 the method for particulate matter, sulfur vapor and sulfur dioxide includes following step in the separating flue of the present invention
Suddenly：
1) flue-gas temperature is down to 450 DEG C using heat reclaim unit 4, wherein, the flue gas is excessive sulfur vapor and phosphorus
The gas being made up of caused by gypsum reaction particulate matter, sulfur vapor and sulfur dioxide；
2) flue gas after cooling is filtered using film filter 1, filtration temperature is 400 DEG C, filtration velocity 1.3m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter 1, and the flue gas passes through the membrane filtration
The filter medium of device 1 obtains the first flue gas；The material of the filter medium is intermetallic compound, and aperture is 20 μm, air flux
For 570m3/m2·kPa·h；
3) making first flue gas, the sulfur vapor condenses, described by the condenser 2 that condensation temperature is 130 DEG C
First flue gas obtains the second flue gas through the condenser 2.
Dustiness in the flue gas of gained first is 5.8mg/Nm3, the particulate matter rate of recovery is 98.3%, the sulphur in the second flue gas
Vapor concentration is 59mg/Nm3, the rate of recovery of sulfur vapor is 98.1%.
Embodiment 4
As shown in Fig. 2 the method for particulate matter, sulfur vapor and sulfur dioxide includes following step in the separating flue of the present invention
Suddenly：
1) flue-gas temperature is down to 500 DEG C using heat reclaim unit 4, wherein, the flue gas is excessive sulfur vapor and phosphorus
The gas being made up of caused by gypsum reaction particulate matter, sulfur vapor and sulfur dioxide；
2) flue gas after cooling is filtered using film filter 1, filtration temperature is 450 DEG C, filtration velocity 1.6m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter 1, and the flue gas passes through the membrane filtration
The filter medium of device 1 obtains the first flue gas；The material of the filter medium is intermetallic compound, and aperture is 25 μm, air flux
For 650m3/m2·kPa·h；
3) making first flue gas, the sulfur vapor condenses, described by the condenser 2 that condensation temperature is 140 DEG C
First flue gas obtains the second flue gas through the condenser 2.
Dustiness in the flue gas of gained first is 7.6mg/Nm3, the particulate matter rate of recovery is 97.6%, the sulphur in the second flue gas
Vapor concentration is 81mg/Nm3, the rate of recovery of sulfur vapor is 97.3%.
Embodiment 5
As shown in Fig. 2 the method for particulate matter, sulfur vapor and sulfur dioxide includes following step in the separating flue of the present invention
Suddenly：
1) flue-gas temperature is down to 550 DEG C using heat reclaim unit 4, wherein, the flue gas is excessive sulfur vapor and phosphorus
The gas being made up of caused by gypsum reaction particulate matter, sulfur vapor and sulfur dioxide；
2) flue gas after cooling is filtered using film filter 1, filtration temperature is 500 DEG C, filtration velocity 2m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter 1, and the flue gas passes through the membrane filtration
The filter medium of device 1 obtains the first flue gas；The material of the filter medium is intermetallic compound, and aperture is 30 μm, air flux
For 810m3/m2·kPa·h；
3) making first flue gas, the sulfur vapor condenses, described by the condenser 2 that condensation temperature is 200 DEG C
First flue gas obtains the second flue gas through the condenser 2.
Dustiness in the flue gas of gained first is 10mg/Nm3, the particulate matter rate of recovery is 97%, and the sulphur in the second flue gas steams
Gas concentration is 100mg/Nm3, the rate of recovery of sulfur vapor is 96.6%.
The method of particulate matter, sulfur vapor and sulfur dioxide is applied to ardealite in separating flue in above-described embodiment 1-5
Recycling when sulfur vapor and ardealite course of reaction it is as follows：By ardealite with particulate matter (average grain diameter 20-60um)
Form is added in reacting furnace 3, sulfur vapor is with N2Reacting furnace 3 is passed through for carrier, wherein, molar ratio：Sulphur/Ca=3-5, reaction
Reaction temperature in stove 3 controls conversion ratio >=98% of the calcium sulfate in 800-1200 DEG C, ardealite, specifically occurs following anti-
Should：
One section of reaction：CaSO4(s)+S2(g)=CaS (s)+SO2(g)
Second-stage reaction：CaS(s)+3CaSO4(s)=4CaO (s)+4SO2(g)
Overall reaction：S2(g)+4CaSO4(s)=4CaO (s)+4SO2(g)
Particulate matter in flue gas, sulfur vapor and sulfur dioxide are efficiently separated it can be seen that above-described embodiment 1-5 is realized and have made
The purpose that the rate of recovery of each component is high and purity is high, sulfur vapor and particulate matter can be utilized rationally again, when applied to phosphorus stone
During the recycling of cream, the recycling of ardealite can be made with excellent good in economic efficiency.
The relevant content of the present invention is illustrated above.Those of ordinary skill in the art are in the feelings illustrated based on these
The present invention can be realized under condition.Based on the above of the present invention, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained on the premise of work, should all belong to the scope of protection of the invention.
Claims (10)
1. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue, the flue gas is in sulphur content solution gypsum byproduct
The gas being made up of caused by calcium sulfate particulate matter, sulfur vapor and sulfur dioxide, the described method comprises the following steps：
1) flue gas is filtered using film filter (1), filtration temperature >=300 DEG C, filtration velocity 0.5-2.0m/
min；Particulate matter in the flue gas is retained by the filter medium of the film filter (1), and the flue gas passes through the film mistake
The filter medium of filter (1) obtains the first flue gas, dustiness≤10mg/Nm in first flue gas3；
2) first flue gas is made to be condensed by the condenser (2) that condensation temperature is 100-200 DEG C, the sulfur vapor, institute
State the first flue gas and obtain the second flue gas through the condenser (2), sulfur vapor concentration≤100mg/Nm in second flue gas3。
2. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
Filtration temperature is stated as 300-500 DEG C；The flue gas is cooled before being additionally included in into the film filter (1).
3. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 2, it is characterised in that：Institute
Filtration temperature is stated as 350-450 DEG C.
4. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
The material for stating filter medium is intermetallic compound, cermet or metal alloy.
5. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
The aperture for stating filter medium is 10-30 μm, air flux >=300m3/m2·kPa·h。
6. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
Condensation temperature is stated as 120-140 DEG C.
7. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
It is 0.9-1.6m/min to state filtration velocity.
8. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
It is ardealite, desulfurated plaster, fluorgypsum, anhydrite or nickel gypsum to state gypsum byproduct.
9. the method for particulate matter, sulfur vapor and sulfur dioxide in separating flue as claimed in claim 1, it is characterised in that：Institute
State in flue gas and also contain relative to the inert inert gas of the sulfur vapor；The inert gas is N2And/or CO2。
10. the recovery and treatment method of ardealite, including using particulate matter, sulphur in the separating flue described in one of claim 1-9
The method of steam and sulfur dioxide reacts produced flue gas to handle sulphur with ardealite.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621683A (en) * | 2019-01-16 | 2019-04-16 | 秦皇岛海涛万福环保设备股份有限公司 | The method and apparatus of vent gas treatment |
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