CN110218828A - Blast furnace gas purification method - Google Patents
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- CN110218828A CN110218828A CN201910636483.7A CN201910636483A CN110218828A CN 110218828 A CN110218828 A CN 110218828A CN 201910636483 A CN201910636483 A CN 201910636483A CN 110218828 A CN110218828 A CN 110218828A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The present invention relates to a kind of purification methods of blast furnace gas, mainly solve chloride, sulfide, oil and dust in blast furnace gas purification in the prior art and remove not completely, cause gas piping perishable, the exceeded technical problem of sulfur dioxide (SO2) emissions after blast furnace gas combustion.The present invention by using the following steps are included: a. blast furnace come out blast furnace gas enter rough dedusting unit, after rough dedusting formed logistics I；B. logistics I enters TRT generator unit, and logistics II is formed after power generation；C. logistics II enters comprehensive purifying tower, contains micro crystal material adsorbent in the comprehensive purifying tower, removes the chloride and sulfide in coal gas, forms logistics III；D. logistics III enters the technical solution that subsequent blast furnace gas uses workshop section, preferably solves the problems, such as this, can be used in the industrial production of blast furnace gas purification.
Description
Technical field
The present invention relates to a kind of purification methods of blast furnace gas, especially the purification method for the blast furnace gas of power generation.
Background technique
Blast furnace gas be iron and steel enterprise in ironmaking processes by-product containing carbon monoxide, carbon dioxide, nitrogen, hydrogen
Low heat value fuel gas.Not purified blast furnace gas contains a large amount of dust, and dust-laden coal gas can block gas piping, burning dress
The burner set also can cause to wear to Gas Generator Set, increase the pressure loss.Therefore dust removal process, dedusting are first being carried out before
It is divided into rough dedusting and refined dedusting.During pulverized coal injection, all can blowing bituminous coal or anthracite to some extent, when coal powder injection, sulphur
Element generates SO through high-temperature chemical reaction2, SO3Deng；And the import resources in blast furnace raw material, especially Australia's mine, then contain a large amount of Cl-。
Saturated steam in coal gas is gradually precipitated with the reduction of gas temperature, and chlorine therein, sulphur are soluble in water, gas condensed water
It is easy to be in stronger acidity, gas piping is caused to corrode, serious person influences the safe operation of blast furnace gas pipeline network.Blast furnace coal
The presence of chlorine, sulfide can corrode gas turbine blades in gas, reduce combustion engine service life.Sulfide in coal gas removes H2S, also
Organic sulfur, after unprocessed burning, sulfur dioxide in flue gas discharge is exceeded.The organic matters such as the heavy oil contained in blast furnace gas also can
Block combustion engine nozzle.So blast furnace gas before combustion power generation, is purified, the dust carried in coal gas, chlorination are removed
Object, sulfide, heavy oil etc..
Existing Purify Process of Blast Furnace, this link of dedusting are replaced traditional wet process by dry dedusting technology.It is dry
The etching problem of gas piping is very prominent after discovery purified treatment in formula dedusting operation.It is removed using blast-furnace gas alkali spraying method
Most of chloride and sulfide in coal gas mitigate the corrosion of gas piping, but due to largely spraying alkali and water spray circulation washing,
Calorific value of gas is not only reduced, coal gas utility value is influenced, is also consumed by a large amount of water resource, a large amount of chlorine with high salt, high is also created and gives up
Water needs to handle.
Document CN201710404777.8 discloses a kind of blast furnace gas disacidifying method, and process is: in existing blast furnace gas
Blast furnace gas disacidifying device is set on the basis of dry-dedusting system, and blast furnace gas disacidifying device includes: dust gun, injection tank
And air supply source, dust gun include: the sprinkling irrigation and the nozzle that is arranged on jet pipe through gas piping；Nozzle is located at gas piping
It is internal；Injection tank is fixedly connected by dusting pipeline with dust gun；Injection tank is provided with vulcanization nozzle；Air supply source passes through organ
It is connect with fluidisation nozzle；Blowing carrier enters injection tank by fluidizing nozzle, fluidizes the lime powder in injection tank, after fluidisation
Lime powder dust gun is flowed by the pipeline that dusts, finally flow into gas piping, the strong absorptive of lime powder is by blast furnace
Partial moisture in coal gas absorbs, generate after calcium hydroxide again with the sour gas in coal gas, such as HCl, SO2, SO3, H2S, CO2
Etc. being chemically reacted, the substances such as CaCl2, CaS, CaSO3, CaSO4, CaCO3 are generated, ash-storing bin is finally recovered to, reduced
Content of acid gas in coal gas.
Document CN201220070822.3 is related to a kind of blast furnace gas dry dusting dechlorination set composite, including passes through pipeline
Power generator and reducer unit in parallel after being connected to blast furnace, the power generator and reducer unit are serially connected with grain bed before
Deduster contains dechlorination particle, desulfurization particle and deamination particle, moisture absorption particle in the grain bed deduster.Grain bed dedusting
It is provided with rough dedusting device, grain bed deduster before device and is provided with dry method refined dedusting device later.Blast furnace gas is removed simultaneously
In chlorine, sulphur, ammonia.
The prior art does not use the report of micro crystal material class adsorbent purification blast furnace gas, does not more disclose using crystallite
Material sorbent, while the report of hydrogen chloride and sulfide in blast furnace gas is removed, gas purifying method of the present invention removes completely
Hydrogen chloride and hydrogen sulfide remove the heavy oil in blast furnace gas and the dust after refined dedusting.Targetedly solve presently, there are
The halfway technical problem of blast furnace gas purification.
Summary of the invention
The technical problem to be solved by the present invention is to chloride, sulfide, dust and heavy oil removings in blast furnace gas not to do
Only, cause gas piping perishable, chloride, sulfide corrosion combustion engine blade, the exceeded technical problem of sulfur dioxide (SO2) emissions, this
Invention provides a kind of new blast furnace gas purification method.This method is used for using in the production of heated by gas or power generation, and tool purifies
Completely, sulphur emissions are low, and pipeline is not easy the stable advantage of burn into power generator.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows: a kind of purification method of blast furnace gas, packet
Include following steps:
A kind of purification method of blast furnace gas, comprising the following steps:
A. the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting；
B. logistics I enters TRT generator unit, and logistics II is formed after power generation；
C. logistics II enters comprehensive purifying tower, contains micro crystal material adsorbent in the comprehensive purifying tower, removes in coal gas
Chloride and sulfide form logistics III；
D. logistics III uses workshop section into subsequent blast furnace gas.
In above-mentioned technical proposal, preferred technical solution is to contain period of element in the micro crystal material class adsorbent
At least one of Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element element in table.
In above-mentioned technical proposal, preferred technical solution is that the IIth element A is selected from magnesium and calcium in the periodic table of elements
At least one of；Ith B race element is selected from least one of copper, silver；IIIth B race element in lanthanum, cerium, yttrium at least
One kind, VIII race's element are selected from least one of iron, cobalt, nickel.
In above-mentioned technical proposal, preferred technical solution is that micro crystal material is selected from X in the micro crystal material class adsorbent
Type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM type molecular sieve, modenite, zeolite beta, SAPO type molecular sieve, ALPO type
Molecular sieve, MCM-22 molecular sieve, MCM-49, MCM-56, SSZ-13 molecular sieve, ZSM-5/ modenite, ZSM-5/ β zeolite,
ZSM-5/Y, MCM-22/ modenite, ZSM-5/Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolite/Y boiling
At least one of stone or ZSM-5/Y zeolite/modenite.
In above-mentioned technical proposal, preferred technical solution is ZSM type micro crystal material in the micro crystal material class adsorbent
Including at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48, the ZSM type micro crystal material silicoaluminophosphate molecular ratio is 100
~10000。
In above-mentioned technical proposal, preferred technical solution is that the micro crystal material class adsorbent removes blast furnace coal simultaneously
Oil, dust, ammonia, organic sulfur and inorganic sulfur in gas.
In above-mentioned technical proposal, preferred technical solution is that the temperature of logistics II is 0 ~ 120 DEG C.
In above-mentioned technical proposal, preferred technical solution is that the sulfide is hydrogen sulfide, sulfur dioxide, curing
At least one of carbon, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide.
In above-mentioned technical proposal, preferred technical solution is that the micro crystal material class adsorbent is recyclable regenerative suction
Attached dose.
In above-mentioned technical proposal, preferred technical solution is, thick dedirt unit using gravitational precipitator, cyclone dust collectors,
At least one of bag filter, electric precipitation or ceramic high temperature deduster.
In above-mentioned technical proposal, preferred technical solution is that smart dedirt unit uses bag filter, spraying and dedusting, suction
At least one of attached dedusting method.
In above-mentioned technical proposal, preferred technical solution is that the micro crystal material adsorbent is regenerable sorbent.
In above-mentioned technical proposal, preferred technical solution is that the micro crystal material is hydrophobic type adsorbent.The ZSM
Type micro crystal material silicoaluminophosphate molecular ratio is 100 ~ 10000.
In above-mentioned technical proposal, preferred technical solution is that logistics I enters before TRT generator unit, carries out smart dedirt list
Member, using the method refined dedusting of at least one of bag filter, spraying and dedusting, absorption dedusting.
During Purify Process of Blast Furnace, the blast furnace gas in dry-dedusting system is after dust separation, existing skill
Art such as adds spray washing tower (for removing CO2) wet process except chlorine-hydride method can remove hydrogen chloride in coal gas, but loses the calorific value of coal gas, reduces
The recycling of blast furnace gas is worth.Using method of the invention, have the advantages that (1) uses micro crystal material adsorbent, energy
Hydrogen chloride and hydrogen sulfide, organic sulfur can be removed thoroughly completely, solve perishable gas piping, combustion engine corrosion of blade, discharge
The exceeded problem of sulfide.(2) adsorbent is subjected to multifunction, can simultaneously dechlorination, desulfurization, de-oiling, dedusting, one adsorb
In tower, comprehensive purifying process can be carried out simultaneously, reduced the device of dechlorination, desulfurization respectively in this way, reduced production cost.(3)
Blast-furnace gas pressure, temperature after dechlorination desulfurizing and purifying will not all be greatly reduced, and the calorific value of coal gas is effectively retained.
Using technical solution of the present invention: the high coal gas that blast furnace roof comes out enters rough dedusting unit, enters after rough dedusting
TRT generator unit, the blast furnace gas after power generation enter comprehensive purifying tower, contain micro crystal material class adsorbent in purifying column,
The chloride and sulfide in coal gas are fallen in removing simultaneously, enter back into subsequent blast furnace gas and use workshop section.The outlet of comprehensive purifying tower
Locating hydrogen sulfide content is less than 1mg/m3, hydrogen chloride content is less than 1mg/m3, oil content 0, dust content is less than 5 mg/m3。
The organic sulfur carried in gas is also removed, and sulfur dioxide (SO2) emissions are in 10m/m in combustion engine flue gas3Hereinafter, device is stable,
Achieve preferable technical effect.
Detailed description of the invention
The blast furnace gas purification flow diagram of the present invention that Fig. 1 is.
In Fig. 1,1 is the blast furnace gas of blast furnace, and 2 be logistics I, i.e. blast furnace gas after rough dedusting, and 3 be logistics II, i.e.,
Blast furnace gas after TRT power generation；4 be logistics III, for the blast furnace gas after comprehensive dechlorination desulfurization.
I is rough dedusting system, and II is TRT generator unit, and III is comprehensive purifying tower, and IV uses unit to be subsequent.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, contains ZSM in the comprehensive purifying tower
Micro crystal material class adsorbent, while removing hydrogen chloride and sulfide in coal gas, logistics III is formed, chloride contains in logistics III
Amount is less than 10mg/m3, sulfide content is less than 10 mg/m3, oil content is less than 20 mg/m3, dust concentration is less than 5mg/m3.Object
Stream III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, concentration of hydrogen sulfide
Stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, sulfur dioxide in the exhaust emissions of combustion engine
Concentration is less than 10mg/m3。
[embodiment 2]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity after formed logistics II, wherein in logistics II hydrogen cloride concentration in 100~300mg/m3It
Between, concentration of hydrogen sulfide is in 25~75mg/m3Between, 100~250mg/m of organic sulfur compound content3Between, dust concentration 10~
20mg/m3Between, 20~80mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, and the comprehensive purifying tower includes
There is ZSM micro crystal material class adsorbent, while removing the hydrogen chloride and sulfide in coal gas, forms logistics III, chlorine in logistics III
Compound content is less than 8mg/m3, sulfide content is less than 8 mg/m3, oil content is less than 15 mg/m3, dust concentration is less than 5mg/
m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, hydrogen sulfide
Concentration is stablized, and pipeline and combustion engine blade have no obvious corrosion phenomenon, has no that combustion engine nozzle blocks, dioxy in the exhaust emissions of combustion engine
Change sulphur concentration and is less than 8mg/m3。
[embodiment 3]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 100~300mg/m3It
Between, concentration of hydrogen sulfide is in 25~75mg/m3Between, 100~250mg/m of organic sulfur compound content3Between, dust concentration 10~
20mg/m3Between, 20~80mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, and the comprehensive purifying tower includes
The Y micro crystal material class adsorbent for having copper modified, while removing hydrogen chloride and sulfide in coal gas, form logistics III, logistics
Chloride content is less than 8mg/m in III3, sulfide content is less than 8 mg/m3, oil content is less than 15 mg/m3, dust concentration is less than
5mg/m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, sulphur
Change hydrogen concentration to stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 8mg/m3。
[embodiment 4]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, changes in the comprehensive purifying tower containing zinc
Property ZSM-5 class adsorbent, while removing the hydrogen chloride and sulfide in coal gas, form logistics III, chloride in logistics III
Content is less than 10mg/m3, sulfide content is less than 10 mg/m3, oil content is less than 20 mg/m3, dust concentration is less than 5mg/m3。
Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, hydrogen sulfide were dense
Degree is stablized, and pipeline and combustion engine blade have no obvious corrosion phenomenon, has no that combustion engine nozzle blocks, titanium dioxide in the exhaust emissions of combustion engine
Sulphur concentration is less than 10mg/m3。
[embodiment 5]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, changes in the comprehensive purifying tower containing copper
Property ZSM-5 micro crystal material and zinc modification Y micro crystal material class adsorbent, while remove fall coal gas in hydrogen chloride and vulcanization
Object forms logistics III, and chloride content is less than 10mg/m in logistics III3, sulfide content is less than 10 mg/m3, oil content is less than
10 mg/m3, dust concentration is less than 5mg/m3.Logistics III enters power generator and generates electricity, device continuous operation 3 months or more, comprehensive
Purifying column exit hydrogen chloride, concentration of hydrogen sulfide are stablized, and pipeline and combustion engine blade have no obvious corrosion phenomenon, have no combustion engine nozzle
It blocks, sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
[embodiment 6]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, changes in the comprehensive purifying tower containing copper
The ZSM-5 micro crystal material of property and the Y micro crystal material class adsorbent of zinc modification, wherein the silica alumina ratio of ZSM-5 micro crystal material is big
It is greater than 20 in the silica alumina ratio of 100, Y micro crystal material.Adsorbent removes hydrogen chloride and sulfide in coal gas simultaneously, is formed
Logistics III, chloride content is less than 10mg/m in logistics III3, sulfide content is less than 10 mg/m3, oil content is less than 10 mg/
m3, dust concentration is less than 5mg/m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower
Exit hydrogen chloride, concentration of hydrogen sulfide are stablized, and pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks,
Sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
[embodiment 7]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, contains rare earth in the comprehensive purifying tower
The modified Y micro crystal material class adsorbent of lanthanum, while removing the hydrogen chloride and sulfide in coal gas, form logistics III, logistics III
Middle chloride content is less than 10mg/m3, sulfide content is less than 10 mg/m3, oil content is less than 10 mg/m3, dust concentration is less than
5mg/m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, sulphur
Change hydrogen concentration to stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 5mg/m3。
[embodiment 8]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, contains ZSM in the comprehensive purifying tower
Micro crystal material and modenite class adsorbent, while removing hydrogen chloride and sulfide in coal gas, form logistics III, logistics III
Middle chloride content is less than 20mg/m3, sulfide content is less than 15 mg/m3, oil content is less than 15 mg/m3, dust concentration is less than
5mg/m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, sulphur
Change hydrogen concentration to stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 7mg/m3。
[embodiment 9]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, contains ZSM in the comprehensive purifying tower
Micro crystal material and modenite class adsorbent, while removing hydrogen chloride and sulfide in coal gas, form logistics III, logistics III
Middle chloride content is less than 20mg/m3, oil content is less than 15 mg/m3, dust concentration is less than 5mg/m3, sulfide content is less than 15
mg/m3, sulfide is at least one of hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide.Object
Stream III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, concentration of hydrogen sulfide
Stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, sulfur dioxide in the exhaust emissions of combustion engine
Concentration is less than 7mg/m3。
[embodiment 10]
As shown in Fig. 1, the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting, and logistics I enters
TRT generator unit, after TRT generates electricity formed logistics II, wherein in logistics II hydrogen cloride concentration in 50~200mg/m3Between,
Concentration of hydrogen sulfide is in 0~50mg/m3Between, 100~200mg/m of organic sulfur compound content3Between, 10~20mg/m of dust concentration3
Between, 10~100mg/m of oil content3Between.Logistics II enters in comprehensive purifying tower, contains ZSM in the comprehensive purifying tower
Micro crystal material and modenite class adsorbent, while removing hydrogen chloride and sulfide in coal gas, form logistics III, logistics III
Middle chloride content is less than 20mg/m3, sulfide content is less than 15 mg/m3, oil content is less than 15 mg/m3, dust concentration is less than
5mg/m3.Logistics III enters power generator and generates electricity, and device continuous operation 3 months or more, comprehensive purifying tower exit hydrogen chloride, sulphur
Change hydrogen concentration to stablize, pipeline and combustion engine blade have no obvious corrosion phenomenon, have no that combustion engine nozzle blocks, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 7mg/m3。
It after adsorbent in comprehensive adsorption tower adsorbs a week, is regenerated, is regenerated at 100 DEG C or more using purified coal gas
Afterwards, the absorption property of adsorbent is stablized, and chloride content is less than 20mg/m in logistics III3, sulfide content is less than 10 mg/m3,
Oil content is less than 20 mg/m3, dust concentration is less than 5mg/m3。
Claims (10)
1. a kind of purification method of blast furnace gas, comprising the following steps:
A. the blast furnace gas that blast furnace comes out enters rough dedusting unit, and logistics I is formed after rough dedusting；
B. logistics I enters TRT generator unit, and logistics II is formed after power generation；
C. logistics II enters comprehensive purifying tower, contains micro crystal material adsorbent in the comprehensive purifying tower, removes in coal gas
Chloride and sulfide form logistics III；
D. logistics III uses workshop section into subsequent blast furnace gas.
2. the purification method of blast furnace gas according to claim 1, it is characterised in that the micro crystal material class adsorbent
In containing in the periodic table of elements in the Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element at least
A kind of element.
3. the purification method of high coal gas according to claim 2, it is characterised in that the IIth A member in the periodic table of elements
Element is selected from least one of magnesium and calcium；Ith B race element is selected from least one of copper, silver；IIIth B race element be selected from lanthanum,
At least one of cerium, yttrium, VIII race's element are selected from least one of iron, cobalt, nickel.
4. the purification method of blast furnace gas according to claim 1, it is characterised in that the micro crystal material class adsorbent
Middle micro crystal material is selected from X-type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM type molecular sieve, modenite, zeolite beta, SAPO
Type molecular sieve, ALPO type molecular sieve, MCM-22 molecular sieve, MCM-49, MCM-56, SSZ-13
Molecular sieve, ZSM-5/ modenite, ZSM-5/ β zeolite, ZSM-5/Y, MCM-22/ modenite, ZSM-5/
In Magadiite, ZSM-5/ β zeolite/modenite, ZSM-5/ β zeolite/Y zeolite or ZSM-5/Y zeolite/modenite extremely
Few one kind.
5. the purification method of blast furnace gas according to claim 4, it is characterised in that the micro crystal material class adsorbent
Middle ZSM type micro crystal material includes at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48, the ZSM type micro crystal material
Silicoaluminophosphate molecular ratio is 100 ~ 10000.
6. the purification method of blast furnace gas according to claim 1, it is characterised in that the micro crystal material class adsorbent
Oil, dust, ammonia, organic sulfur and the inorganic sulfur in blast furnace gas are removed simultaneously, and the temperature of logistics II is 0 ~ 120 DEG C.
7. the purification method of blast furnace gas according to claim 1, it is characterised in that the sulfide is hydrogen sulfide, two
At least one of sulfur oxide, carbon disulfide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide.
8. the purification method of blast furnace gas according to claim 1, it is characterised in that the micro crystal material class adsorbent
For recyclable regenerative adsorbent.
9. the purification method of blast furnace gas according to claim 1, it is characterised in that thick dedirt unit uses gravitational dust collection
At least one of device, cyclone dust collectors, bag filter, electric precipitation or ceramic high temperature deduster.
10. the purification method of blast furnace gas according to claim 1, it is characterised in that logistics I enter TRT generator unit it
Before, smart dedirt unit is carried out, using the method refined dedusting of at least one of bag filter, spraying and dedusting, absorption dedusting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910636483.7A CN110218828A (en) | 2019-07-15 | 2019-07-15 | Blast furnace gas purification method |
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| CN112593034A (en) * | 2020-04-30 | 2021-04-02 | 上海大学 | Dry-method cooperative deacidification system and method for blast furnace clean gas |
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