CN106179287B - 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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- CN106179287B CN106179287B CN201610752296.1A CN201610752296A CN106179287B CN 106179287 B CN106179287 B CN 106179287B CN 201610752296 A CN201610752296 A CN 201610752296A CN 106179287 B CN106179287 B CN 106179287B
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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
-
- 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
-
- 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
Abstract
The present invention relates to adsorbent reactivation during a kind of coke-stove gas temp.-changing adsorption desulfurization and regeneration off gases processing method, including：1) acticarbon bed is close to or up to the adsorption tower of adsorption saturation and carry out regenerative operation is isolated from system；2) adsorbent reactivation is divided into using the coke-stove gas after adsorption tower as regeneration gas and using hot-air as two kinds of forms of regeneration gas：The regeneration gas for going out adsorption tower is rich in organic sulfur and H2The regeneration off gases of S；3) regeneration off gases all send the incinerator in coking low-quality sulfur and desulfurization waste liquor burning acid-making process as fuel or combustion adjuvant after the gas fan boosting in gas buffer tank buffering and acid-making process；Product SO after burning2It is the raw material that sulphur slurry burns acid-making process, sulphuric acid output can be increased；The present invention makes full use of prior art and equipment, realizes 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 more particularly to a kind of coke-stove gas temp.-changing adsorption to take off
Adsorbent reactivation and regeneration off gases processing method during sulphur.
Background technology
Temp.-changing adsorption is the technique of a kind of simple, effective gas separation and purification, is had at present in many industrial circles
It is widely applied.
The temp.-changing adsorption sulfur removal technology of coke-stove gas refers to be filled in the adsorption tower of acticarbon bed, leads to
Physical absorption is crossed, selectively by the organic sulfur and H in coke-stove gas2S is adsorbed in the surface of acticarbon and internal holes
In gap structure, therefore, organic sulfur and H2S in coke-stove gas can be effectively removed.When activated carbon approaches or reach adsorption saturation
When, it needs to carry out the regeneration of acticarbon, ensures that activated carbon can recycle.During regenerative operation, using a small amount of alternating temperature
The coke-stove gas after desulfurization is adsorbed as regeneration gas, after heat exchange heating, is inversely sent into adsorption tower, make absorption activated carbon surface with
Organic sulfur and H in internal pore structure2S is entered by thermal desorption in regeneration gas, and adsorption tower is taken out of with regeneration gas.Go out adsorption tower
Regeneration gas, organic sulfur and H2The content of S is especially high, becomes regeneration off gases.
The harmless treatment of regeneration off gases is the problem of temp.-changing adsorption sulfur removal technology.CN101323799A pairs of Chinese patent
The processing of regeneration off gases is using feeding torch pipe network burning disposal after the removing tar that cools, benzene and naphthalene or is sent into coke-oven plant
Existing gas ductwork.But such processing mode of regeneration off gases has drawback：If it is sent into torch pipe network, organic sulfur and H2S fires
SO 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 being sent into the existing gas ductwork in coke-oven plant, can equally cause the secondary pollution of environment,
And reduce the quality of steel.Chinese patent CN103446861A and CN203498338U is to use to the processing of regeneration off gases
Hydroconversion process：After regeneration off gases first are heated to 300~400 DEG C, organic sulfur conversion tower is sent into, by having in regeneration off gases
Machine sulphur hydro-conversion is H2S after cooling down, then send to wet desulfurizing process and removes H2S, make organic sulfur in regeneration off gases and
H2S is recycled and utilizes, and is arranged outside no exhaust gas, and environment protecting is good.But technological process is long, investment is big, operating cost is high.
Chinese patent CN103072957A and CN101092577A all relate to a kind of using ammonia process Wet-type oxidation sweetening work
The low-quality sulfur and desulfurization waste liquor generated in skill be raw material, the new process of extracting sulfuric acid.《Fuel and chemical industry》2015 the 46th
In volume, the common process that Bai Wei, Wang Songlin, Zhang Suli burn coking low-quality sulfur and desulfurization waste liquor relieving haperacidity has made detailed Jie
It continues.More than in different acid-making process, the burning of sulphur slurry (low-quality sulfur+desulfurization waste liquor), is fired using coke-stove gas
Expect continuous burning heat release, maintain the incineration temperature in incinerator.Primary product after sulphur slurry burns is SO2、N2、CO2、H2The gas of O
State mixture, then by different process extracting sulfuric acids.
Invention content
The present invention provides adsorbent reactivation during a kind of coke-stove gas temp.-changing adsorption desulfurization and regeneration off gases processing methods, adopt
By the use of coke-stove gas or hot-air as adsorbent reactivation gas, regeneration off gases are directly all sent to coking low-quality sulfur and desulfurization and give up
Incinerator in liquid burning acid-making process is as fuel or combustion adjuvant；Product SO after burning2It is that sulphur slurry burns acid-making process
Raw material can increase sulphuric acid output；The present invention makes full use of prior art and equipment, realize adsorbent reactivation, regeneration off gases without
Evilization processing and the effective recycling of Sulphur ressource.
In order to achieve the above object, the present invention is realized using following technical scheme：
Adsorbent reactivation and regeneration off gases processing method, include the following steps during coke-stove gas temp.-changing adsorption desulfurization：
1) coke-stove gas after wet desulphurization unit by loading the adsorption tower of acticarbon bed, selects
Organic sulfur and H in selecting property removing coke-stove gas2S is then sent to downstream user use；Acticarbon bed is approached or is reached
To the adsorption tower of adsorption saturation, carry out regenerative operation is isolated from system automatically by sequencing valve；
2) adsorbent reactivation is divided into following two forms：
The first reconstituted form：Using the coke-stove gas after adsorption tower as regeneration gas, regeneration hot-air heater is sent into, is passed through
150~400 DEG C are warming up to water vapour indirect heat exchange, then reverse be sent into is needed in regenerated adsorption tower, makes absorption in activity
Organic sulfur and H in carbon surface and internal pore structure2S is entered by thermal desorption in regeneration gas；
Second of reconstituted form：Inversely being sent into first by the nitrogen from Nitrogen pipe network needs regenerated adsorption tower, displacement
Coal gas in adsorption tower, then cuts off nitrogen；Using the hot-air burned in acid-making process after air heater as regeneration gas,
At 150~400 DEG C, reverse be sent into needs in regenerated adsorption tower temperature, makes absorption in activated carbon surface and internal pore structure
In organic sulfur and H2S is entered by thermal desorption in regeneration gas；After hot regenerative operation, hot-air is cut off, it is cold using nitrogen
Blow the hot-air displaced in adsorption tower；
The regeneration gas for going out adsorption tower is rich in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases all send coking low product after the gas fan boosting in gas buffer tank buffering and acid-making process
Matter sulphur and desulfurization waste liquor burn the incinerator in acid-making process；The regeneration off gases conduct generated when coke-stove gas is as regeneration gas
Incinerator fuel uses, and can provide heat for burning, maintain incineration temperature；The regenerated generated when hot-air is as regeneration gas
Gas is used as the combustion adjuvant that sulphur slurry and coal gas burn；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 for burning acid-making process, the yield of sulfuric acid can be increased.
During using the first adsorbent reactivation form, first by the use of the coke-stove gas before adsorption tower as regeneration gas, send to again
Angry heater with water vapour indirect heat exchange, is warming up to 150~400 DEG C, then it is reverse be sent into need in regenerated adsorption tower into
Row regenerative operation；Since the coke-stove gas before adsorption tower contains organic sulfur and H in itself2S, when regeneration efficiency is reduced to less than 10%
When, the coke-stove gas after adsorption tower is used instead as regeneration gas, is sent to regeneration hot-air heater heat exchange and is warming up to 150~400 DEG C
Reverse be sent into needs to carry out regenerative operation in regenerated adsorption tower afterwards.
Compared with prior art, the beneficial effects of the invention are as follows：
1) prior art and equipment are made full use of, realizes adsorbent reactivation, regeneration off gases harmless treatment and Sulphur ressource
Effective recycling；
2) technological process is short, and small investment, operating cost is low, easy to operate；
3) environment protecting is good.
Description of the drawings
Fig. 1 is the process flow chart of the embodiment of the present invention 1.(coke-stove gas after adsorption tower is as regeneration gas)
Fig. 2 is the process flow 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 flow chart of the embodiment of the present invention 3.(hot-air is as regeneration gas)
In figure：1. adsorption tower 2. regenerates 5. gas fan of hot-air heater 3. gas buffer tank, 4. incinerator, 6. air
7. air blower 8~15 of heater, bypass duct one~eight
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
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, includes the following steps：
1) coke-stove gas after wet desulphurization unit by loading the adsorption tower 1 of acticarbon bed, selects
Organic sulfur and H in selecting property removing coke-stove gas2S is then sent to downstream user use；Acticarbon bed is approached or is reached
To the adsorption tower 1 of adsorption saturation, carry out regenerative operation is isolated from system automatically by sequencing valve；
2) adsorbent reactivation is divided into following two forms：
As shown in Figure 1, the first reconstituted form：Using the coke-stove gas after adsorption tower 1 as regeneration gas, it is sent into regeneration gas
Heater 2, by being warming up to 150~400 DEG C with water vapour indirect heat exchange, then reverse be sent into is needed in regenerated adsorption tower 1,
Make organic sulfur and H of the absorption in activated carbon surface and internal pore structure2S is entered by thermal desorption in regeneration gas；
As shown in Fig. 2, second of reconstituted form：Inversely being sent into first by the nitrogen from Nitrogen pipe network needs regenerated suction
Attached tower 1, the coal gas in displacement sorption tower 1, then cuts off nitrogen；It is empty using the heat burned in acid-making process after air heater 6
Gas is as regeneration gas, and at 150~400 DEG C, reverse be sent into needs in regenerated adsorption tower 1 temperature, makes absorption in activated carbon surface
With the organic sulfur and H in internal pore structure2S is entered by thermal desorption in regeneration gas；After hot regenerative operation, it is empty to cut off heat
Gas displaces the hot-air in adsorption tower 1 using nitrogen cold blowing；
The regeneration gas for going out adsorption tower 1 is rich in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases all send coking low after the gas fan 5 in the buffering of gas buffer tank 3 and acid-making process boosts
Quality sulphur and desulfurization waste liquor burn the incinerator 4 in acid-making process；The regeneration off gases generated when coke-stove gas is as regeneration gas
It is used as 4 fuel of incinerator, heat can be provided for burning, maintain incineration temperature；It is generated when hot-air is as regeneration gas
Regeneration off gases are used as the combustion adjuvant that sulphur slurry and coal gas burn；Due to organic sulfur and H in regeneration off gases2The content of S is high, burning
Primary product SO afterwards2It is the raw material for burning acid-making process, the yield of sulfuric acid can be increased.
As shown in figure 3, during using the first adsorbent reactivation form, first by the use of the coke-stove gas before adsorption tower 1 as again
Anger is sent to regeneration hot-air heater 2, with water vapour indirect heat exchange, is warming up to 150~400 DEG C, and then reverse be sent into needs to regenerate
Adsorption tower 1 in carry out regenerative operation；Since the coke-stove gas before adsorption tower 1 contains organic sulfur and H in itself2S, when regeneration efficiency drops
During as low as less than 10%, the coke-stove gas after adsorption tower 1 is used instead as regeneration gas, the regeneration heat exchange of hot-air heater 2 is sent to and rises
Temperature needs to carry out regenerative operation in regenerated adsorption tower 1 to being inversely sent into after 150~400 DEG C.
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
As shown in Figure 1, adsorbent reactivation and regeneration off gases when the present embodiment is used to implement 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；The adsorption tower 1 is filled with acticarbon bed, the coke oven combustion of 1 bottom of towe of adsorption tower
Coke-stove gas conveyance conduit before gas entrance connection tower, the coke-stove gas outlet of 1 tower top of adsorption tower are conveyed by coke-stove gas after tower
Pipeline connection coke-stove gas manifold；Incinerator 4 is equipped with sulphur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, with heat
The hot air duct that wind entrance is connected is equipped with air blower 7 and air heater 6, is set on the gas piping being connected with fuel gas inlet
There is gas fan 5；Further include regeneration hot-air heater 2 and gas surge tank 3；The regeneration hot-air heater 2 is changed using water vapour-gas
Hot device, the gas vent for regenerating hot-air heater 2 pass through coke-stove gas conveyance conduit after the connection tower of bypass duct 1, gas access
Coke-stove gas manifold is connected by bypass duct 29；The air inlet of gas buffer tank 3 passes through burnt before the connection tower of 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 connects external gaspipe network simultaneously；The fuel gas inlet of gas piping connection incinerator 4 after gas fan 5.
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 use.To reduce operating cost, activated carbon adsorption
Agent must can reuse, and therefore, being close to or up to the acticarbon of adsorption saturation must regenerate.
Acticarbon bed needs regenerated adsorption tower 1, is isolated from system automatically by sequencing valve, carries out
Regenerative operation.Using the coke-stove gas after a small amount of adsorption tower 1 as regeneration gas, send to regeneration hot-air heater 2, it is indirect with water vapour
Heat exchange, is warming up to 150~400 DEG C, and then reverse be sent into needs regenerated adsorption tower 1, makes absorption in activated carbon surface and inside
Organic sulfur and H in pore structure2S is entered by thermal desorption in regeneration gas.Go out the regeneration gas of adsorption tower 1, organic sulfur and H2S's contains
Amount is especially high, becomes regeneration off gases.
Regeneration off gases neither cool nor absorb heat heating, directly through in the buffering of gas buffer tank 3 and acid-making process
After gas fan 5 boosts, all send to incinerator 4.Due to organic sulfur and H in regeneration off gases2The content of S is especially high, not only may be used
Heat is provided as fuel combustion, maintains incineration temperature, and the primary product SO after burning2It is the original for burning acid-making process
Material increases the yield of sulfuric acid.
In the present embodiment, when adsorption tower 1 no during temp.-changing adsorption sulfur removal technology needs to carry out regenerative operation, do not produce
Raw regeneration off gases, switching use the coke-stove gas of coke-oven plant's gas ductwork as the fuel gas of incinerator；When acid-making process needs
Maintenance and it is out of service when, regeneration off gases are first stored in gas buffer tank 3.
【Embodiment 2】
As shown in Fig. 2, adsorbent reactivation and regeneration off gases processing unit during coke-stove gas temp.-changing adsorption desulfurization, including coke oven
Adsorption tower 1 and coking low-quality sulfur and desulfurization waste liquor in coal gas temperature swing adsorption process burn the incinerator 4 in acid-making process；
The adsorption tower 1 is filled with acticarbon bed, and coke-stove gas is defeated before the coke oven fuel gas inlet connection tower of 1 bottom of towe of adsorption tower
Pipeline is sent, the coke-stove gas outlet of 1 tower top of adsorption tower connects coke-stove gas manifold by coke-stove gas conveyance conduit after tower；It burns
Stove 4 is equipped with sulphur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, is set on the hot air duct being connected with hot-wind inlet
There are air blower 7 and air heater 6, the gas piping being connected with fuel gas inlet is equipped with gas fan 5；Further include regeneration gas
Heater 2 and gas surge tank 3；The regeneration hot-air heater 2 uses water vapour-gas heat exchanger, regenerates the gas of hot-air heater 2
By coke-stove gas conveyance conduit after the connection tower of bypass duct 1, gas access passes through bypass duct 4 11 and connects coke oven for outlet
Gas main, and pass through bypass duct 6 13 and connect coke-stove gas conveyance conduit before tower；Coke-stove gas conveyance conduit passes through before tower
Bypass duct 7 14 connects the gas piping before gas fan 5, the combustion gas of the gas piping connection incinerator 4 after gas fan 5
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 use.To reduce operating cost, activated carbon adsorption
Agent must can reuse, and therefore, being close to or up to the acticarbon of adsorption saturation must regenerate.
Acticarbon bed needs regenerated adsorption tower 1, is isolated from system automatically by sequencing valve, carries out
Regenerative operation.It is sent first using the coke-stove gas before a small amount of adsorption tower 1 as regeneration gas to regeneration hot-air heater 2, with water vapour
Indirect heat exchange is warming up to 150~400 DEG C, and then reverse be sent into needs regenerated adsorption tower 1, make absorption in activated carbon surface and
Organic sulfur and H in internal pore structure2S is entered by thermal desorption in regeneration gas.Since the coke-stove gas before adsorption tower 1 contains in itself
Organic sulfur and H2S, so with the progress of regenerative operation, regeneration gas is increasingly difficult to organic to be parsed from acticarbon
Sulphur and H2S.At this point, the coke-stove gas before adsorption tower 1 is not used as regeneration gas, but after using a small amount of adsorption tower 1
Coke-stove gas is sent to regeneration hot-air heater 2 as regeneration gas, and water vapour indirect heat exchange, is warming up to 150~400 DEG C, then inverse
Regenerated adsorption tower 1 is needed to being sent into, makes absorption remaining organic sulfur and H in activated carbon surface and internal pore structure2S by
Thermal desorption enters in regeneration gas.Go out the regeneration gas of adsorption tower 1, organic sulfur and H2The content of S is especially high, becomes regeneration off gases.
Regeneration off gases neither cool nor absorb heat heating, directly through in the buffering of gas buffer tank 3 and acid-making process
After gas fan boosting, all send to incinerator 4.Due to organic sulfur and H in regeneration off gases2The content of S is especially high, serves not only as
Fuel combustion provides heat, maintains incineration temperature, and the primary product SO after burning2It is the raw material for burning acid-making process, increases
The yield of sulfuric acid is added.
Using the coke-stove gas before adsorption tower 1 and after adsorption tower 1 one after another as regeneration gas, revival is not interfered with not only
Fruit, and a large amount of purified coke-stove gas can be saved every year, improve the economic benefit of temp.-changing adsorption sulfur removal technology.
【Embodiment 3】
As shown in figure 3, adsorbent reactivation and regeneration off gases processing unit during coke-stove gas temp.-changing adsorption desulfurization, including coke oven
Adsorption tower 1 and coking low-quality sulfur and desulfurization waste liquor in coal gas temperature swing adsorption process burn the incinerator 4 in acid-making process；
The adsorption tower 1 is filled with acticarbon bed, and coke-stove gas is defeated before the coke oven fuel gas inlet connection tower of 1 bottom of towe of adsorption tower
Pipeline is sent, the coke-stove gas outlet for adsorbing column overhead connects coke-stove gas manifold by coke-stove gas conveyance conduit after tower；It burns
Stove 4 is equipped with sulphur slurry entrance, compressed air inlet, fuel gas inlet and hot-wind inlet, is set on the hot air duct being connected with hot-wind inlet
There are air blower 7 and air heater 6, the gas piping being connected with fuel gas inlet is equipped with gas fan 5；Further include regeneration gas
Heater 2 and gas surge tank 3；The regeneration hot-air heater 2 uses water vapour-gas heat exchanger, regenerates the gas of hot-air heater 2
Outlet connects 10 by bypass duct three and connects air by coke-stove gas conveyance conduit after the connection tower of bypass duct 1, gas access
Hot air duct after heater 6, bypass duct 3 10 connect nitrogen gas delivery-line simultaneously；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；Coke-stove gas conveyance conduit connects the gas piping before gas fan 5, gas fan by bypass duct 7 14 before tower
The fuel gas inlet of gas piping connection incinerator 4 after 5.
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 use.To reduce operating cost, activated carbon adsorption
Agent must can reuse, and therefore, being close to or up to the acticarbon of adsorption saturation must regenerate.
Acticarbon bed needs regenerated adsorption tower 1, is isolated from system automatically by sequencing valve, carries out
Regenerative operation.First using a small amount of nitrogen from Nitrogen pipe network, do not need to heat exchange heating and (be not passed through in regeneration hot-air heater 2
Steam), directly reverse be sent into needs regenerated adsorption tower 1, and the coal gas in displacement sorption tower, the coal gas displaced is sent into incinerator
4.After coal gas replacement in adsorption tower 1 is clean, nitrogen is cut off.Conventional to burn in acid-making process, incinerator is taken out by air blower 7
It takes after exchanging heat in air to air heater 6 with water vapour as combustion adjuvant, the present embodiment is by a small amount of warm after air heater 6
For air as regeneration gas, temperature does not need to heat exchange heating (not being passed through steam in regeneration hot-air heater 2), directly at 150~400 DEG C
Connecing reverse be sent into needs regenerated adsorption tower 1, makes organic sulfur and H of the absorption in activated carbon surface and internal pore structure2S by
Thermal desorption enters in regeneration gas.After hot regenerative operation, hot-air is cut off, using nitrogen cold blowing (in regeneration hot-air 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 cool nor absorb heat heating, directly after the buffering of gas buffer tank 3, all send to burning
Stove 4.Due to regeneration off gases organic sulfur and H2The content of S is especially high, can be used as sulphur slurry and the combustion adjuvant of gas-fired, and
Product SO after burning2It is the raw material for burning acid-making process, increases the yield of sulfuric acid.
In the present embodiment, when no adsorption tower 1 needs to carry out regenerative operation during temp.-changing adsorption sulfur removal technology, do not generate
Regeneration off gases are then burned the hot-air in acid-making process and are all sent to incinerator 4；When the maintenance of acid-making process needs is out of service
When, then using a small amount of nitrogen as regeneration gas, with carrying out regeneration behaviour after vapor heat exchange heating in regeneration hot-air heater 2
Make, the exhaust gas after regeneration is first stored in gas buffer tank 3.
Using a small amount of hot-air burned in acid-making process after air heater 6 as regeneration gas, regeneration can not only be promoted
Effect, and a large amount of clean coke-stove gas and water vapour can be saved every year, improve the economy of temp.-changing adsorption sulfur removal technology
Benefit.
More than in 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.Being related to the forward and backward concept of pipeline is
For pipeline internal medium flow direction.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. adsorbent reactivation and regeneration off gases processing method during coke-stove gas temp.-changing adsorption desulfurization, which is characterized in that including as follows
Step：
1) coke-stove gas after wet desulphurization unit, by loading the adsorption tower of acticarbon bed, selectivity
Remove the organic sulfur and H in coke-stove gas2S is then sent to downstream user use；Acticarbon bed is close to or up to suction
The adsorption tower of attached saturation isolates carry out regenerative operation by sequencing valve from system automatically；
2) adsorbent reactivation is divided into following two forms：
The first reconstituted form：Using the coke-stove gas after adsorption tower as regeneration gas, be sent into regeneration hot-air heater, by with water
Steam indirect heat exchange is warming up to 150~400 DEG C, and then reverse be sent into is needed in regenerated adsorption tower, makes absorption in activated carbon table
Organic sulfur and H in face and internal pore structure2S is entered by thermal desorption in regeneration gas；
Second of reconstituted form：Inversely being sent into first by the nitrogen from Nitrogen pipe network needs regenerated adsorption tower, displacement sorption
Coal gas in tower, then cuts off nitrogen；Using the hot-air burned in acid-making process after air heater as regeneration gas, temperature
At 150~400 DEG C, reverse be sent into is needed in regenerated adsorption tower, makes absorption in activated carbon surface and internal pore structure
Organic sulfur and H2S is entered by thermal desorption in regeneration gas；After hot regenerative operation, hot-air is cut off, is put using nitrogen cold blowing
The hot-air to swap out in adsorption tower；
The regeneration gas for going out adsorption tower is rich in organic sulfur and H2The regeneration off gases of S；
3) regeneration off gases all send coking low-quality sulphur after the gas fan boosting in gas buffer tank buffering and acid-making process
Sulphur and desulfurization waste liquor burn the incinerator in acid-making process；The regeneration off gases generated when coke-stove gas is as regeneration gas are as burning
Stove fuel uses, and can provide heat for burning, maintain incineration temperature；The regeneration off gases generated when hot-air is as regeneration gas are made
The combustion adjuvant burned for sulphur slurry and coal gas uses；Due to organic sulfur and H in regeneration off gases2The content of S is high, the main production after burning
Object SO2It is the raw material for burning acid-making process, the yield of sulfuric acid can be increased.
2. adsorbent reactivation and regeneration off gases processing method during coke-stove gas temp.-changing adsorption desulfurization according to claim 1,
It is characterized in that, during using the first adsorbent reactivation form, first by the use of the coke-stove gas before adsorption tower as regeneration gas, send to
Hot-air heater is regenerated, with water vapour indirect heat exchange, is warming up to 150~400 DEG C, then reverse be sent into is needed in regenerated adsorption tower
Carry out regenerative operation；Since the coke-stove gas before adsorption tower contains organic sulfur and H in itself2S, when regeneration efficiency is reduced to less than 10%
When, the coke-stove gas after adsorption tower is used instead as regeneration gas, is sent to regeneration hot-air heater heat exchange and is warming up to 150~400 DEG C
Reverse be sent into needs to carry out regenerative operation in regenerated adsorption tower afterwards.
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| CN107824007A (en) * | 2017-11-28 | 2018-03-23 | 上海亿景能源科技有限公司 | The regenerative system of heating carrier is used as by the use of waste gas itself |
| CN108144410A (en) * | 2018-01-26 | 2018-06-12 | 孟瑞宏 | For purifying the cleaning apparatus for self of oven gas |
| CN108977235B (en) * | 2018-09-17 | 2023-12-05 | 陕西黑猫焦化股份有限公司 | Method and device for removing impurities in coal gas by using temperature swing adsorption method |
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| CN110935281B (en) * | 2019-04-11 | 2022-04-15 | 北京诺维新材科技有限公司 | Adsorption and regeneration device and method for solid adsorbent for adsorbing volatile organic compounds |
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| CN110791328A (en) * | 2019-11-28 | 2020-02-14 | 中冶南方都市环保工程技术股份有限公司 | Blast furnace gas dry desulphurization system and method |
| CN110917807A (en) * | 2019-12-13 | 2020-03-27 | 宁夏宝丰能源集团股份有限公司 | Resource cooperative treatment system and method for pollutants of coking plant |
| CN111778063A (en) * | 2020-07-27 | 2020-10-16 | 北京石油化工工程有限公司 | System and method for removing sulfur dioxide from liquid-phase hydrocarbons |
| CN111905521A (en) * | 2020-08-18 | 2020-11-10 | 宁波中科远东催化工程技术有限公司 | Coke oven gas desulfurization process and system |
| CN113457371A (en) * | 2021-07-30 | 2021-10-01 | 山西沃能化工科技有限公司 | Recycling method and device for coke oven gas TSA impurity removal regenerated gas |
| CN113600246A (en) * | 2021-08-23 | 2021-11-05 | 中冶赛迪上海工程技术有限公司 | Desulfurization catalyst regeneration method and system |
| CN113877553B (en) * | 2021-10-27 | 2024-01-23 | 中冶赛迪技术研究中心有限公司 | Active carbon regeneration process for desulfurization of blast furnace gas |
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