CN106179287A - Adsorbent reactivation and regeneration off gases processing method during coke-stove gas temp.-changing adsorption desulfurization - Google Patents
Adsorbent reactivation and regeneration off gases processing method during coke-stove gas temp.-changing adsorption desulfurization Download PDFInfo
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- CN106179287A CN106179287A CN201610752296.1A CN201610752296A CN106179287A CN 106179287 A CN106179287 A CN 106179287A CN 201610752296 A CN201610752296 A CN 201610752296A CN 106179287 A CN106179287 A CN 106179287A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/304—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/306—Organic sulfur compounds, e.g. mercaptans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
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Abstract
The present invention relates to adsorbent reactivation and regeneration off gases processing method during a kind of coke-stove gas temp.-changing adsorption desulfurization, including: 1) acticarbon bed isolates from system and carries out regenerative operation close to or up adsorbing saturated adsorption tower；2) adsorbent reactivation is divided into the coke-stove gas after using adsorption tower as regeneration gas and to use hot-air as two kinds of forms of regeneration gas: the regeneration gas going out adsorption tower is enriched in organic sulfur and H2The regeneration off gases of S；3) regeneration off gases is after the gas fan boosting in gas buffer tank buffering and acid-making process, all send coking low-quality sulfur and desulfurization waste liquor to burn the incinerator in acid-making process as fuel or combustion adjuvant；Product SO after burning2It is the raw material of sulfur slurry burning acid-making process, sulphuric acid output can be increased；The present invention makes full use of existing Processes and apparatus, it is achieved that adsorbent reactivation, regeneration off gases harmless treatment and the effective recycling of Sulphur ressource.
Description
Technical field
The present invention relates to coke-stove gas temp.-changing adsorption technical field of desulfurization, particularly relate to a kind of coke-stove gas temp.-changing adsorption and take off
Adsorbent reactivation and regeneration off gases processing method during sulfur.
Background technology
Temp.-changing adsorption is the technique that a kind of gas simple, effective separates and purifies, existing at many industrial circles at present
It is widely applied.
The temp.-changing adsorption sulfur removal technology of coke-stove gas, refers in the adsorption tower being filled with acticarbon bed, logical
Cross physical absorption, optionally by the organic sulfur in coke-stove gas and H2S adsorbs in the surface of acticarbon and internal holes
In gap structure, accordingly, it is capable to effectively remove the organic sulfur in coke-stove gas and H2S.When activated carbon close to or reach to adsorb saturated
Time, need to carry out the regeneration of acticarbon, it is ensured that activated carbon can recycle.During regenerative operation, use a small amount of alternating temperature
Coke-stove gas after absorption desulfurization as regeneration gas, after heat exchange heats up, inversely sends into adsorption tower, make absorption at activated carbon surface and
Organic sulfur in internal pore structure and H2S is entered in regeneration gas by thermal desorption, takes adsorption tower out of with regeneration gas.Go out adsorption tower
Regeneration gas, organic sulfur and H2The content of S is the highest, becomes regeneration off gases.
The harmless treatment of regeneration off gases, is a difficult problem for temp.-changing adsorption sulfur removal technology.Chinese patent CN101323799A pair
The process of regeneration off gases is sent into torch pipe network burning disposal after using cool removing tar, benzene and naphthalene or sends into coke-oven plant
Existing gas ductwork.But, this kind of processing mode of regeneration off gases has drawback: if sending into torch pipe network, organic sulfur and H2S fires
SO it is converted mainly into after burning2, high altitude discharge, to air, can cause environmental pollution；The existing gas ductwork in coke-oven plant is used as coke oven
Heating, city gas and steel-making use, if sending into the existing gas ductwork in coke-oven plant, can cause the secondary pollution of environment equally,
And reduce the quality of steel.Chinese patent CN103446861A and CN203498338U is to use to the process of regeneration off gases
Hydroconversion process: after first regeneration off gases being heated to 300～400 DEG C, sends into organic sulfur conversion tower, by having in regeneration off gases
Machine sulfur hydro-conversion is H2S, after cooling down, then delivers to wet desulfurizing process removing H2S, make organic sulfur in regeneration off gases and
H2S is recycled and utilizes, and without arranging outside waste gas, environment protecting is good.But, technological process length, investment is big, operating cost high.
Chinese patent CN103072957A and CN101092577A all relates to a kind of employing ammonia process Wet-type oxidation sweetening work
The low-quality sulfur and the desulfurization waste liquor that produce in skill are raw material, the new technology of extracting sulfuric acid." fuel and chemical industry " 2015 the 46th
In volume, the common process that coking low-quality sulfur and desulfurization waste liquor are burned antacid by Bai Wei, Wang Songlin, Zhang Suli has made detailed Jie
Continue.In above different acid-making process, the burning of sulfur slurry (low-quality sulfur+desulfurization waste liquor), is all to use coke-stove gas to fire
Material continuous burning heat release, maintains the incineration temperature in incinerator.Primary product after sulfur slurry burns is SO2、N2、CO2、H2The gas of O
State mixture, is then passed through different operation extracting sulfuric acids.
Summary of the invention
When the invention provides a kind of coke-stove gas temp.-changing adsorption desulfurization, adsorbent reactivation and regeneration off gases processing method, adopt
With coke-stove gas or hot-air as adsorbent reactivation gas, regeneration off gases the most all delivers to coking low-quality sulfur and desulfurization is given up
Liquid burns the incinerator in acid-making process as fuel or combustion adjuvant；Product SO after burning2It is that sulfur slurry burns acid-making process
Raw material, can increase sulphuric acid output；The present invention makes full use of existing Processes and apparatus, it is achieved that adsorbent reactivation, regeneration off gases without
Evilization process and the effective recycling of Sulphur ressource.
In order to achieve the above object, the present invention realizes by the following technical solutions:
During coke-stove gas temp.-changing adsorption desulfurization, adsorbent reactivation and regeneration off gases processing method, comprise the steps:
1) from the coke-stove gas after wet desulphurization unit, by loading the adsorption tower of acticarbon bed, choosing
Organic sulfur in selecting property removing coke-stove gas and H2S, is then sent to downstream user and uses；Acticarbon bed is close or reaches
To the adsorption tower that absorption is saturated, automatically isolated from system by sequencing valve and carry out regenerative operation；
2) adsorbent reactivation is divided into following two form:
The first reconstituted form: use the coke-stove gas after adsorption tower as regeneration gas, send into regeneration gas heater, pass through
It is warming up to 150～400 DEG C with water vapour indirect heat exchange, then in the reverse adsorption tower sending into needs regeneration, makes absorption in activity
Organic sulfur in carbon surface and internal pore structure and H2S is entered in regeneration gas by thermal desorption；
The second reconstituted form: first the nitrogen from Nitrogen pipe network is inversely sent into and need the adsorption tower of regeneration, displacement
Coal gas in adsorption tower, is then cut off nitrogen；In employing burning acid-making process, the hot-air after air heater is as regeneration gas,
Temperature, at 150～400 DEG C, in the reverse adsorption tower sending into needs regeneration, makes absorption at activated carbon surface and internal pore structure
In organic sulfur and H2S is entered in regeneration gas by thermal desorption；After hot regenerative operation terminates, cut off hot-air, use nitrogen cold
Blow the hot-air displacing in adsorption tower；
The regeneration gas going out adsorption tower is enriched in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases is after the gas fan boosting in gas buffer tank buffering and acid-making process, all send coking low product
Matter sulfur and desulfurization waste liquor burn the incinerator in acid-making process；Coke-stove gas is as the regeneration off gases conduct produced during regeneration gas
Incinerator fuel uses, it is possible to provide heat for burning, maintains incineration temperature；Hot-air is as the regenerated produced during regeneration gas
The combustion adjuvant that gas burns as sulfur slurry and coal gas uses；Due to organic sulfur and H in regeneration off gases2The content of S is high, the master after burning
Want product SO2It is the raw material burning acid-making process, the yield of sulphuric acid can be increased.
When using the first adsorbent reactivation form, first with the coke-stove gas before adsorption tower as regeneration gas, deliver to again
Angry heater, with water vapour indirect heat exchange, is warming up to 150～400 DEG C, then enters in the reverse adsorption tower sending into needs regeneration
Row regenerative operation；Owing to the coke-stove gas before adsorption tower itself is containing organic sulfur and H2S, when regeneration efficiency is reduced to less than 10%
Time, use the coke-stove gas after adsorption tower instead as regeneration gas, be sent to regeneration gas heater heat exchange and be warming up to 150～400 DEG C
Regenerative operation is carried out in the rear reverse adsorption tower sending into needs regeneration.
Compared with prior art, the invention has the beneficial effects as follows:
1) existing Processes and apparatus is made full use of, it is achieved that adsorbent reactivation, regeneration off gases harmless treatment and Sulphur ressource
Effective recycling；
2) technological process is short, small investment, and operating cost is low, simple to operate；
3) environment protecting is good.
Accompanying drawing explanation
Fig. 1 is the process chart of the embodiment of the present invention 1.(coke-stove gas after adsorption tower is as regeneration gas)
Fig. 2 is the process chart of the embodiment of the present invention 2.(the coke-stove gas conduct one after another before adsorption tower and after adsorption tower
Regeneration gas)
Fig. 3 is the process chart of the embodiment of the present invention 3.(hot-air is as regeneration gas)
In figure: 1. adsorption tower 2. regeneration gas heater 3. gas buffer tank 4. incinerator 5. gas fan 6. air
Heater 7. air blower 8～15, bypass duct one～eight
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
As shown in Figure 1-Figure 3, during coke-stove gas temp.-changing adsorption desulfurization of the present invention at adsorbent reactivation and regeneration off gases
Reason method, comprises the steps:
1) from the coke-stove gas after wet desulphurization unit, by loading the adsorption tower 1 of acticarbon bed, choosing
Organic sulfur in selecting property removing coke-stove gas and H2S, is then sent to downstream user and uses；Acticarbon bed is close or reaches
To the adsorption tower 1 that absorption is saturated, automatically isolated from system by sequencing valve and carry out regenerative operation；
2) adsorbent reactivation is divided into following two form:
As it is shown in figure 1, the first reconstituted form: use the coke-stove gas after adsorption tower 1 as regeneration gas, send into regeneration gas
Heater 2, by being warming up to 150～400 DEG C with water vapour indirect heat exchange, then in the reverse adsorption tower 1 sending into needs regeneration,
Make absorption organic sulfur in activated carbon surface and internal pore structure and H2S is entered in regeneration gas by thermal desorption；
As in figure 2 it is shown, the second reconstituted form: first the nitrogen from Nitrogen pipe network is inversely sent into and need the suction of regeneration
Attached tower 1, the coal gas in displacement sorption tower 1, it is then cut off nitrogen；Use the heat sky after air heater 6 in burning acid-making process
Gas is as regeneration gas, and temperature, at 150～400 DEG C, in the reverse adsorption tower 1 sending into needs regeneration, makes absorption at activated carbon surface
With the organic sulfur in internal pore structure and H2S is entered in regeneration gas by thermal desorption；After hot regenerative operation terminates, cut off heat empty
Gas, uses nitrogen cold blowing to displace the hot-air in adsorption tower 1；
The regeneration gas going out adsorption tower 1 is enriched in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases is after gas fan 5 boosting in gas buffer tank 3 buffering and acid-making process, all send coking low
Quality sulfur and desulfurization waste liquor burn the incinerator 4 in acid-making process；Coke-stove gas is as the regeneration off gases produced during regeneration gas
Use as incinerator 4 fuel, it is possible to provide heat for burning, maintain incineration temperature；Hot-air is as generation during regeneration gas
The combustion adjuvant that regeneration off gases is burned as sulfur slurry and coal gas uses；Due to organic sulfur and H in regeneration off gases2The content of S is high, burning
After primary product SO2It is the raw material burning acid-making process, the yield of sulphuric acid can be increased.
During as it is shown on figure 3, use the first adsorbent reactivation form, first with the coke-stove gas before adsorption tower 1 as again
Anger, delivers to regeneration gas heater 2, with water vapour indirect heat exchange, is warming up to 150～400 DEG C, and then reverse feeding needs regeneration
Adsorption tower 1 in carry out regenerative operation；Owing to the coke-stove gas before adsorption tower 1 itself is containing organic sulfur and H2S, when regeneration efficiency drops
Low to less than 10% time, use the coke-stove gas after adsorption tower 1 instead as regeneration gas, be sent to regeneration gas heater 2 heat exchange liter
Regenerative operation is carried out in the reverse adsorption tower 1 sending into needs regeneration after warm to 150～400 DEG C.
Following example are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiment.In following embodiment, method therefor is as without special
Do not mentionlet alone and bright be conventional method.
[embodiment 1]
As it is shown in figure 1, the present embodiment is used for realizing adsorbent reactivation and regeneration off gases during coke-stove gas temp.-changing adsorption desulfurization
The device of processing method, including the adsorption tower 1 in coke-stove gas temperature swing adsorption process and coking low-quality sulfur and desulfurization waste liquor
Burn the incinerator 4 in acid-making process；Described adsorption tower 1 is filled with acticarbon bed, the coke oven combustion at the bottom of adsorption tower 1 tower
Gas entrance connects coke-stove gas conveyance conduit before tower, and the coke-stove gas outlet of adsorption tower 1 tower top is carried by coke-stove gas after tower
Pipeline connects coke-stove gas house steward；Incinerator 4 is provided with sulfur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, with heat
The hot air duct that wind entrance is connected is provided with air blower 7 and air heater 6, and the gas piping being connected with fuel gas inlet sets
There is gas fan 5；Also include regeneration gas heater 2 and gas surge tank 3；Described regeneration gas heater 2 uses water vapour-gas to change
Hot device, the gas outlet of regeneration gas heater 2 is by coke-stove gas conveyance conduit, gas access after bypass duct 1 connection tower
Coke-stove gas house steward is connected by bypass duct 29；The air inlet of gas buffer tank 3 is burnt before connecting tower by bypass duct 4 11
Producer gas conveyance conduit, gas outlet connects the gas piping before gas fan 5 by bypass duct 5 12, before gas fan 5
Gas piping is simultaneously connected with outside gaspipe network；Gas piping after gas fan 5 connects the fuel gas inlet of incinerator 4.
Coke-stove gas after wet desulphurization unit, by loading the adsorption tower 1 of acticarbon bed, selects
Property removing coke-stove gas in organic sulfur and H2S, is then sent to downstream user and uses.For reducing running cost, activated carbon adsorption
Agent must be able to reuse, and therefore, must regenerate close to or up adsorbing saturated acticarbon.
Acticarbon bed needs the adsorption tower 1 of regeneration, is automatically isolated from system by sequencing valve, carries out
Regenerative operation.Use the coke-stove gas after a small amount of adsorption tower 1 as regeneration gas, deliver to regeneration gas heater 2, indirect with water vapour
Heat exchange, is warming up to 150～400 DEG C, and then the reverse adsorption tower 1 sending into needs regeneration, makes absorption in activated carbon surface and inside
Organic sulfur in pore structure and H2S is entered in regeneration gas by thermal desorption.Go out the regeneration gas of adsorption tower 1, organic sulfur and H2S contains
Measure the highest, become regeneration off gases.
Regeneration off gases neither cools intensification of the most not absorbing heat, directly in gas buffer tank 3 buffering and acid-making process
After gas fan 5 boosting, all deliver to incinerator 4.Due to organic sulfur and H in regeneration off gases2The content of S is the highest, not only may be used
Heat, maintenance incineration temperature, and the primary product SO after burning is provided as fuel combustion2It is the former of burning acid-making process
Material, adds the yield of sulphuric acid.
In the present embodiment, when not having adsorption tower 1 to need to carry out regenerative operation during temp.-changing adsorption sulfur removal technology, do not produce
Raw regeneration off gases, switching uses the coke-stove gas fuel gas as incinerator of coke-oven plant's gas ductwork；When acid-making process needs
Maintenance and out of service time, regeneration off gases is first stored in gas buffer tank 3.
[embodiment 2]
As in figure 2 it is shown, adsorbent reactivation and regeneration off gases processing means during coke-stove gas temp.-changing adsorption desulfurization, including coke oven
Adsorption tower 1 in coal gas temperature swing adsorption process and coking low-quality sulfur and desulfurization waste liquor burn the incinerator 4 in acid-making process；
Described adsorption tower 1 is filled with acticarbon bed, and before the coke oven fuel gas inlet at the bottom of adsorption tower 1 tower connects tower, coke-stove gas is defeated
Sending pipeline, the coke-stove gas outlet of adsorption tower 1 tower top connects coke-stove gas house steward by coke-stove gas conveyance conduit after tower；Burn
Stove 4 is provided with sulfur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, and the hot air duct being connected with hot-wind inlet sets
Having air blower 7 and air heater 6, the gas piping being connected with fuel gas inlet is provided with gas fan 5；Also include regeneration gas
Heater 2 and gas surge tank 3；Described regeneration gas heater 2 uses water vapour-gas heat exchanger, the gas of regeneration gas heater 2
Exporting by coke-stove gas conveyance conduit after bypass duct 1 connection tower, gas access connects coke oven by bypass duct 4 11
Gas main, and by coke-stove gas conveyance conduit before bypass duct 6 13 connection tower；Before tower, coke-stove gas conveyance conduit passes through
Bypass duct 7 14 connects the gas piping before gas fan 5, and the gas piping after gas fan 5 connects the combustion gas of incinerator 4
Entrance.
Coke-stove gas after wet desulphurization unit, by loading the adsorption tower 1 of acticarbon bed, selects
Property removing coke-stove gas in organic sulfur and H2S, is then sent to downstream user and uses.For reducing running cost, activated carbon adsorption
Agent must be able to reuse, and therefore, must regenerate close to or up adsorbing saturated acticarbon.
Acticarbon bed needs the adsorption tower 1 of regeneration, is automatically isolated from system by sequencing valve, carries out
Regenerative operation.Initially with the coke-stove gas before a small amount of adsorption tower 1 as regeneration gas, deliver to regeneration gas heater 2, with water vapour
Indirect heat exchange, is warming up to 150～400 DEG C, then reverse sends into the adsorption tower 1 needing regeneration, make absorption at activated carbon surface and
Organic sulfur in internal pore structure and H2S is entered in regeneration gas by thermal desorption.Owing to the coke-stove gas before adsorption tower 1 contains itself
Organic sulfur and H2S, so along with the carrying out of regenerative operation, regeneration gas is increasingly difficult to parse from acticarbon organic
Sulfur and H2S.Now, not in use by the coke-stove gas before adsorption tower 1 as regeneration gas, but after using a small amount of adsorption tower 1
Coke-stove gas, as regeneration gas, delivers to regeneration gas heater 2, with water vapour indirect heat exchange, is warming up to 150～400 DEG C, the most inverse
To sending into the adsorption tower 1 needing regeneration, make organic sulfur and H that absorption remains in activated carbon surface and internal pore structure2S is subject to
Thermal desorption enters in regeneration gas.Go out the regeneration gas of adsorption tower 1, organic sulfur and H2The content of S is the highest, becomes regeneration off gases.
Regeneration off gases neither cools intensification of the most not absorbing heat, directly in gas buffer tank 3 buffering and acid-making process
After gas fan boosting, all deliver to incinerator 4.Due to organic sulfur and H in regeneration off gases2The content of S is the highest, serves not only as
Fuel combustion provides heat, maintenance incineration temperature, and the primary product SO after burning2It is the raw material burning acid-making process, increases
Add the yield of sulphuric acid.
Coke-stove gas before using adsorption tower 1 and after adsorption tower 1, one after another as regeneration gas, does not only interfere with revival
Really, and the coke-stove gas after a large amount of purification can be saved every year, improve the economic benefit of temp.-changing adsorption sulfur removal technology.
[embodiment 3]
As it is shown on figure 3, adsorbent reactivation and regeneration off gases processing means during coke-stove gas temp.-changing adsorption desulfurization, including coke oven
Adsorption tower 1 in coal gas temperature swing adsorption process and coking low-quality sulfur and desulfurization waste liquor burn the incinerator 4 in acid-making process；
Described adsorption tower 1 is filled with acticarbon bed, and before the coke oven fuel gas inlet at the bottom of adsorption tower 1 tower connects tower, coke-stove gas is defeated
Sending pipeline, the coke-stove gas outlet of adsorption tower tower top connects coke-stove gas house steward by coke-stove gas conveyance conduit after tower；Burn
Stove 4 is provided with sulfur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, and the hot air duct being connected with hot-wind inlet sets
Having air blower 7 and air heater 6, the gas piping being connected with fuel gas inlet is provided with gas fan 5；Also include regeneration gas
Heater 2 and gas surge tank 3；Described regeneration gas heater 2 uses water vapour-gas heat exchanger, the gas of regeneration gas heater 2
Exporting by coke-stove gas conveyance conduit after bypass duct 1 connection tower, gas access even 10 connects air by bypass duct three
Hot air duct after heater 6, bypass duct 3 10 is simultaneously connected with nitrogen gas delivery-line；The air inlet of gas buffer tank 3 passes through
Bypass duct 4 11 connects coke-stove gas conveyance conduit before tower, and gas outlet connects the combustion-supporting of incinerator 4 by bypass duct 8 15
Gas entrance；Before tower, coke-stove gas conveyance conduit connects the gas piping before gas fan 5, gas fan by bypass duct 7 14
Gas piping after 5 connects the fuel gas inlet of incinerator 4.
Coke-stove gas after wet desulphurization unit, by loading the adsorption tower 1 of acticarbon bed, selects
Property removing coke-stove gas in organic sulfur and H2S, is then sent to downstream user and uses.For reducing running cost, activated carbon adsorption
Agent must be able to reuse, and therefore, must regenerate close to or up adsorbing saturated acticarbon.
Acticarbon bed needs the adsorption tower 1 of regeneration, is automatically isolated from system by sequencing valve, carries out
Regenerative operation.Initially with a small amount of nitrogen from Nitrogen pipe network, it is not necessary to heat exchange heats up and (is not passed through in regeneration gas heater 2
Steam), the most reverse adsorption tower 1 needing regeneration of sending into, the coal gas in displacement sorption tower, the coal gas displaced sends into incinerator
4.After coal gas replacement in adsorption tower 1 is clean, cut off nitrogen.In conventional burning acid-making process, incinerator is taken out by air blower 7
Take air in air heater 6 with water vapour heat exchange after as combustion adjuvant, the present embodiment is by a small amount of warm after air heater 6
Air is as regeneration gas, and temperature is at 150～400 DEG C, it is not necessary to heat exchange heats up (not being passed through steam in regeneration gas heater 2), directly
Connect the reverse adsorption tower 1 sent into and need regeneration, make absorption organic sulfur in activated carbon surface and internal pore structure and H2S is subject to
Thermal desorption enters in regeneration gas.After hot regenerative operation terminates, cut off hot-air, use nitrogen cold blowing (in regeneration gas heater 2
It is not passed through steam), and displace the hot-air in adsorption tower 1.Go out the regeneration gas of adsorption tower 1, organic sulfur and H2The content of S is special
Height, becomes regeneration off gases.
Regeneration off gases neither cools intensification of the most not absorbing heat, and directly after gas buffer tank 3 buffers, all delivers to burn
Stove 4.Due to regeneration off gases organic sulfur and H2The content of S is the highest, can be used as sulfur slurry and the combustion adjuvant of gas-fired, and
Product SO after burning2It is the raw material burning acid-making process, adds the yield of sulphuric acid.
In the present embodiment, when not having adsorption tower 1 to need to carry out regenerative operation during temp.-changing adsorption sulfur removal technology, do not produce
Regeneration off gases, then the hot-air burned in acid-making process all delivers to incinerator 4；Out of service when acid-making process needs maintenance
Time, then use a small amount of nitrogen as regeneration gas, after heating up with steam heat exchange in regeneration gas heater 2, carry out regeneration behaviour
Making, the waste gas after regeneration is first stored in gas buffer tank 3.
In employing burning acid-making process, a small amount of hot-air after air heater 6 is as regeneration gas, can not only promote regeneration
Effect, and substantial amounts of clean coke-stove gas and water vapour can be saved every year, improve the economy of temp.-changing adsorption sulfur removal technology
Benefit.
In above 3 embodiments, before tower after coke-stove gas conveyance conduit, tower before coke-stove gas conveyance conduit, gas fan
Gas piping, nitrogen gas delivery-line, be respectively equipped with valve on bypass duct one～eight.The forward and backward concept relating to pipeline is
For pipeline internal medium flow direction.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (2)
1. adsorbent reactivation and regeneration off gases processing method during the desulfurization of coke-stove gas temp.-changing adsorption, it is characterised in that include as follows
Step:
1) from the coke-stove gas after wet desulphurization unit, by loading the adsorption tower of acticarbon bed, selectivity
Organic sulfur in removing coke-stove gas and H2S, is then sent to downstream user and uses；Acticarbon bed is close to or up suction
Attached saturated adsorption tower, is automatically isolated from system by sequencing valve and carries out regenerative operation；
2) adsorbent reactivation is divided into following two form:
The first reconstituted form: use the coke-stove gas after adsorption tower as regeneration gas, send into regeneration gas heater, by with water
Steam indirect heat exchange is warming up to 150～400 DEG C, then in the reverse adsorption tower sending into needs regeneration, makes absorption at activated carbon table
Organic sulfur in face and internal pore structure and H2S is entered in regeneration gas by thermal desorption；
The second reconstituted form: first the nitrogen from Nitrogen pipe network is inversely sent into and need the adsorption tower of regeneration, displacement sorption
Coal gas in tower, is then cut off nitrogen；In employing burning acid-making process, the hot-air after air heater is as regeneration gas, temperature
At 150～400 DEG C, in the reverse adsorption tower sending into needs regeneration, make absorption in activated carbon surface and internal pore structure
Organic sulfur and H2S is entered in regeneration gas by thermal desorption；After hot regenerative operation terminates, cut off hot-air, use nitrogen cold blowing to put
Swap out the hot-air in adsorption tower；
The regeneration gas going out adsorption tower is enriched in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases is after the gas fan boosting in gas buffer tank buffering and acid-making process, all send coking low-quality sulfur
Sulphur and desulfurization waste liquor burn the incinerator in acid-making process；Coke-stove gas as during regeneration gas produce regeneration off gases as burning
Stove fuel uses, it is possible to provide heat for burning, maintains incineration temperature；Hot-air is made as the regeneration off gases produced during regeneration gas
The combustion adjuvant burned for sulfur slurry and coal gas uses；Due to organic sulfur and H in regeneration off gases2The content of S is high, the main product after burning
Thing SO2It is the raw material burning acid-making process, the yield of sulphuric acid can be increased.
Adsorbent reactivation and regeneration off gases processing method during coke-stove gas temp.-changing adsorption desulfurization the most according to claim 1,
It is characterized in that, when using the first adsorbent reactivation form, first with the coke-stove gas before adsorption tower as regeneration gas, deliver to
Regeneration gas heater, with water vapour indirect heat exchange, is warming up to 150～400 DEG C, then in the reverse adsorption tower sending into needs regeneration
Carry out regenerative operation；Owing to the coke-stove gas before adsorption tower itself is containing organic sulfur and H2S, when regeneration efficiency is reduced to less than 10%
Time, use the coke-stove gas after adsorption tower instead as regeneration gas, be sent to regeneration gas heater heat exchange and be warming up to 150～400 DEG C
Regenerative operation is carried out in the rear reverse adsorption tower sending into needs regeneration.
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