CN109276973A - It drops a hint the method for middle separating-purifying hydrogen from refinery - Google Patents
It drops a hint the method for middle separating-purifying hydrogen from refinery Download PDFInfo
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- CN109276973A CN109276973A CN201811166789.2A CN201811166789A CN109276973A CN 109276973 A CN109276973 A CN 109276973A CN 201811166789 A CN201811166789 A CN 201811166789A CN 109276973 A CN109276973 A CN 109276973A
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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
- B01D53/047—Pressure swing adsorption
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/56—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
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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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- B01D2253/104—Alumina
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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
- B01D2253/106—Silica or silicates
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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
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
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Abstract
The present invention disclose it is a kind of drop a hint the method for middle separating-purifying hydrogen from refinery, this method provides four sections of pressure swing adsorption gas separation devices, using four sections of pressure swing adsorption techniques.The fuel gas and hydrogen of high heating value are gone out using this method middle separating-purifying that can drop a hint from refinery, so that refinery is dropped a hint and is fully used, not only obtain substantial economics, and reduce the pollution that refinery is dropped a hint to environment, obtain great social benefit.
Description
Technical field
The present invention relates to be related to exhaust-gas treatment, and in particular to drops a hint the method for middle separating-purifying hydrogen from refinery.
Background technique
Currently, most of tail gas carries out burning row through torch pipe network since domestic refinery is to the non-enough attention of waste gas utilization
It puts, burning generates CO2、H2O、SO2It and is on a small quantity unburned H2S, primary discharge pollutant are SO2And unburned H2S, one
Aspect causes the wasting of resources of some degree, on the other hand causes environmental pollution.
Summary of the invention
The invention solves the current country directly to carry out burning and exhausting for refinery exhaust, results in waste of resources and environment dirt
The technical issues of dye, provides and a kind of drops a hint the method for middle separating-purifying hydrogen from refinery.
Slave refinery of the invention is dropped a hint the method for middle separating-purifying hydrogen, and four sections of PSA Gas separation dresses are provided
It sets, using four sections of pressure swing adsorption techniques, sequentially proceeds as follows:
Unstripped gas enters first segment pressure-variable adsorption (PSA-1) gas fractionation unit after pressurizeing by compressor, carries out first
Section pressure swing adsorption technique initially enters first segment moisture trap and removes liquid water, subsequently into first segment desulfurizing tower by raw material
Hydrogen sulfide content in gas is reduced to < 20ppm, then enters first segment from first segment absorption tower bottom and is in adsorbed state
In adsorption tower, adsorption bed aluminum oxide, silica gel, special charcoal KYA0232 successively selective absorption under, in unstripped gas
Easily it is adsorbed component i.e. portion of methane, nitrogen, carbon monoxide and major part C2、C2 +Component is adsorbed, obtained after parsing
The fuel gas of high heating value is sent to out-of-bounds, and unadsorbed contains a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, titanium dioxide
Carbon, C2、 C2 +Gaseous mixture outflow at the top of the adsorption tower in adsorbed state among the first segment of component, into second segment transformation
Adsorb (PSA-1) gas fractionation unit；
Gaseous mixture is adsorbed from second segment among into the first segment of second segment pressure-variable adsorption (PSA-2) gas fractionation unit
Tower bottom enters second segment and is in the adsorption tower of adsorbed state, carries out second segment pressure swing adsorption technique, in adsorption bed activity
Under the successively selection of charcoal, molecular sieve is adsorbed, component i.e. nitrogen, methane, an oxidation are easily adsorbed in gaseous mixture among first segment
Carbon, carbon dioxide, C2、C2 +Component is adsorbed, and is recycled after parsing back to unstripped gas, and unadsorbed contains a large amount of nitrogen
Second segment centre gaseous mixture outflow at the top of the adsorption tower in adsorbed state of gas, hydrogen and a small amount of methane, carbon monoxide,
Into third section pressure-variable adsorption (PSA-3) gas fractionation unit；
Gaseous mixture is adsorbed from third section among into the second segment of third section pressure-variable adsorption (PSA-3) gas fractionation unit
Tower bottom enters third section and is in the adsorption tower of adsorbed state, carries out third section pressure swing adsorption technique, in adsorption bed activity
Under the successively selection of charcoal, molecular sieve is adsorbed, component i.e. nitrogen, methane, an oxidation are easily adsorbed in gaseous mixture among second segment
Carbon is adsorbed, unadsorbed containing a large amount of hydrogen and a small amount of nitrogen as sending out battery limit (BL) as dropping a hint after parsing
Gaseous mixture outflow at the top of the adsorption tower in adsorbed state among third section, into the 4th section of pressure-variable adsorption (PSA-4) gas
Separator；
Gaseous mixture is adsorbed from the 4th section among into the third section of the 4th section of pressure-variable adsorption (PSA-4) gas fractionation unit
Tower bottom enters in the 4th section of adsorption tower in adsorbed state, the 4th section of pressure swing adsorption technique is carried out, in adsorption bed spy's charcoal
KYA0232, molecular sieve successively selection absorption under, being easily adsorbed component nitrogen and be adsorbed down in gaseous mixture among third section
Come, is recycled after parsing back to unstripped gas, the outflow at the top of the adsorption tower in adsorbed state of unadsorbed hydrogen,
Product as purity qualification sends out battery limit (BL).
Slave refinery of the invention is dropped a hint the method for middle separating-purifying hydrogen, using four sections of PSA Gas separation streams
Journey goes out the fuel gas and hydrogen of high heating value from refinery middle separating-purifying of dropping a hint, and so that refinery is dropped a hint and is fully used, not only
Substantial economics are obtained, and reduce the pollution that refinery is dropped a hint to environment, obtain great social benefit.
Wherein, first segment pressure swing adsorption technique is 6 adsorption towers, 2 adsorption tower adsorption process, into the 2 of adsorbed state
The unstripped gas of seat absorption tower bottom successively enters in adsorption tower according to the time sequencing being ranked.
Wherein, first segment is in the sequence of the regenerative process of the adsorption tower of adsorbed state are as follows:
Forward bleed off pressure (PP) → isolation (IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two
(D2) it → evacuates (V) → to evacuate and rinses 1 (E1R) of (VP) → pressure equilibrium liter 2 (E2R) → pressure equilibriums liter → final boosting
(FR)。
Wherein, second segment pressure swing adsorption technique is 6 adsorption towers, 2 adsorption tower adsorption process, into the 2 of adsorbed state
The unstripped gas of seat absorption tower bottom successively enters in adsorption tower according to the time sequencing being ranked.
Wherein, second segment is in the sequence of the regenerative process of the adsorption tower of adsorbed state are as follows:
(IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two (D2) → evacuation (V) is isolated
→ evacuate and rinse (VP) → bis- liter (E2R) → mono- liter (E1R) → final rise (FR).
Wherein, third section pressure swing adsorption technique is 6 adsorption towers, 2 adsorption tower adsorption process, into the 2 of adsorbed state
The unstripped gas of seat absorption tower bottom successively enters in adsorption tower according to the time sequencing being ranked.
Wherein, third section is in the sequence of the regenerative process of the adsorption tower of adsorbed state are as follows:
Isolation (IS) → one down (E1D) → two down (E2D) → inverse put (D) → evacuation (V) → evacuation flushing (VP) →
Two, which rise (E2R) → mono-, rises (E1R) → final rise (FR).
Wherein, the 4th section of pressure swing adsorption technique is 5 adsorption towers, 2 adsorption tower adsorption process, into the 2 of adsorbed state
The unstripped gas of seat absorption tower bottom successively enters in adsorption tower according to the time sequencing being ranked.
Wherein, the sequence of the regenerative process of the 4th section of adsorption tower in adsorbed state are as follows:
(IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two (D2) → evacuation (V) is isolated
→ evacuate and rinse (VP) → bis- liter (E2R) → mono- liter (E1R) → final rise (FR).
Detailed description of the invention
Fig. 1 is of the invention to drop a hint four sections of pressure swing adsorption gas separation device works of middle separating-purifying hydrogen from refinery
Skill flow diagram, pipeline A, B and C of part are connected to pipeline A, B and C of part under Fig. 1 respectively on Fig. 1.
Specific embodiment
With reference to the accompanying drawings to it is of the invention from refinery drop a hint middle separating-purifying hydrogen method specific embodiment
It is described in detail, it is of the invention to become more from the drop a hint feature and advantage of method of middle separating-purifying hydrogen of refinery
Obviously.
Unstripped gas is that the refinery of recycling is dropped a hint:
| Component | H2 | CH4 | C2 | C3 | C4 | C5+ | N2 | CO | CO2 | ∑ |
| Content (V%) | 30.76 | 1.64 | 3.53 | 10.03 | 1.88 | 0.47 | 44.16 | 4.95 | 0.96 | 100 |
Unstripped gas sulfide hydrogen is 12000ppm, and 20ppm is less than after desulfurization.
Pressure: about 0.05MPa.
Temperature :≤40 DEG C.
It is of the invention to drop a hint the method for middle separating-purifying hydrogen from refinery referring to attached drawing 1, using four sections of pressure-variable adsorptions
(PSA) gas fractionation unit, it may be assumed that first segment pressure-variable adsorption (PSA-1) gas fractionation unit 100, second segment pressure-variable adsorption
(PSA-2) gas fractionation unit 200, third section pressure-variable adsorption (PSA-3) gas fractionation unit 300 and the 4th section of pressure-variable adsorption
(PSA-4) gas fractionation unit 400.
Slave refinery of the invention is dropped a hint the method for middle separating-purifying hydrogen, is four sections of pressure-variable adsorption (PSA) techniques:
First segment pressure-variable adsorption (PSA-1) technique, which is used to adsorb in unstripped gas, is easily adsorbed component i.e. portion of methane, nitrogen
Gas, carbon monoxide and major part C2、C2 +Component, the fuel gas of high heating value obtained after parsing are sent to out-of-bounds, and unadsorbed contains
A large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +Gaseous mixture enters the among the first segment of component
Two sections of pressure-variable adsorption (PSA-2) techniques.
Second segment pressure-variable adsorption (PSA-2) technique is used to adsorb among first segment and is easily adsorbed component i.e. in gaseous mixture
Nitrogen, methane, carbon monoxide, carbon dioxide, C2、C2 +Component recycles after parsing back to unstripped gas, unadsorbed
Second segment centre gaseous mixture containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide enters third section pressure-variable adsorption (PSA-
3) technique.
Third section pressure-variable adsorption (PSA-3) technique is used to adsorb among second segment and is easily adsorbed component i.e. in gaseous mixture
Nitrogen, methane, carbon monoxide send out battery limit (BL) as dropping a hint after parsing, and unadsorbed contains a large amount of hydrogen and a small amount of nitrogen
Gaseous mixture enters the 4th section of pressure-variable adsorption (PSA-4) technique among the third section of gas.
4th section of pressure-variable adsorption (PSA-4) technique is used to adsorb among third section and is easily adsorbed component nitrogen in gaseous mixture
Gas recycles after parsing back to unstripped gas, and unadsorbed hydrogen is that the product of purity qualification sends out battery limit (BL).
(1) first segment pressure-variable adsorption (PSA-1) gas fractionation unit 100 and first segment pressure-variable adsorption (PSA-1) technique:
First segment pressure-variable adsorption (PSA-1) gas fractionation unit 100 includes 1 first segment moisture trap 101,2 de-
Sulphur tower 100A/B, 6 first segment adsorption tower 101A~F, 1 first segment equalizer tank 102, first segment vacuum pump 2 groups of (A, B and C
Be one group, D, E and F are one group), 1 first segment heat exchanger, 104,1 first segment high-pressure buffering pot 103A, 1 first segment it is low
Press the equipment such as surge tank 103B, 1 compressor 105, valve and pipeline.
First segment pressure-variable adsorption (PSA-1) technique, which is used to adsorb in unstripped gas, is easily adsorbed component i.e. portion of methane, nitrogen
Gas, carbon monoxide and major part C2, C2+ component, the fuel gas of high heating value obtained after parsing is sent to out-of-bounds, unadsorbed
Containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +Gaseous mixture enters among the first segment of component
Second segment pressure-variable adsorption (PSA-2) technique.
Pressure is about 0.05MPa, the unstripped gas of temperature≤40 DEG C is forced into after 0.65MPa by compressor 105 and enters the
One section of pressure-variable adsorption (PSA-1) gas fractionation unit 100 initially enters first segment moisture trap 101 and removes liquid water, so
Enter first segment desulfurizing tower 100A/B afterwards and the hydrogen sulfide content in unstripped gas is reduced to < 20ppm, is then adsorbed from first segment
The bottom tower 101A~F enters first segment and is in the adsorption tower of adsorbed state.
First segment pressure-variable adsorption (PSA-1) gas fractionation unit 100 is 6 adsorption towers, 2 adsorption tower adsorption process, often
Seat adsorption tower is successively undergone:
1. absorption (A) → 2., which forward bleeds off pressure (PP) → 3., is isolated (IS) → 4. one down (E1D) → 5. two down (E2D)
→ 6. inverse put one (D1) → 7. inverse puts two (D2) → 8. evacuate (V) → 9. and evacuate 2 (E2R) of flushing (VP) → 10. pressure equilibrium liter
→ 11. pressure equilibriums rise 1 (E1R) → 12. finally boosting (FR).
1, adsorb (A): unstripped gas enters adsorbed state from first segment pressure-variable adsorption (PSA-1) gas fractionation unit 100
2 absorption tower bottoms enter in adsorption tower according to the time sequencing being ranked, into every of 2 adsorption towers of adsorbed state
Adsorption tower will undergo adsorption step, in the successively selective absorption of adsorption bed aluminum oxide, silica gel, special charcoal KYA0232
Under, component i.e. portion of methane, nitrogen, carbon monoxide and major part C are easily adsorbed in unstripped gas2、C2 +Component is adsorbed down
Come, unadsorbed contains a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +In the first segment of component
Between gaseous mixture from adsorbed state adsorption tower at the top of outflow, into second segment pressure-variable adsorption (PSA-2) gas fractionation unit
200.When adsorption step proceeds to absorption forward position and reaches adsorption bed and export reserved section initial position, just turn off in absorption step
Rapid adsorption tower tower bottom charging sequencing valve and tower top outlet sequencing valve stop absorption, protect adsorption tower tower top outlet end nearby also
One section of unemployed adsorbent is stayed, absorption forward position, which is pushed ahead, when for equal pressure drop is used.
2. along (PP) is put: after absorption (A) step, not inhaled elevated pressures in adsorption tower along absorption direction
Attached contains a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +Gaseous mixture among the first segment of component
Unstripped gas is put back to, is recycled.
3. isolation (IS): turning off, adsorption tower tower bottom charging sequencing valve and tower top outlet in absorption (A) step are program-controlled
In the state that valve stops absorption, kept for certain time.
Adsorption bed starts to be transferred to regenerative process:
4, one down (E1D): after isolation (IS) step, along absorption direction by elevated pressures in adsorption tower not
What is be adsorbed contains a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +It is mixed among the first segment of component
It closes gas and is put into the adsorption tower for having completed to parse and rise in pressure lower one (E1R) step, this needs first to make two
The outlet of adsorption tower presses sequencing valve to be connected, the basic phase of pressure of two adsorption towers at the end of one down (E1D) step is pressed
Deng all in higher intermediate pressure.It adsorbs forward position in one down (E1D) step to push ahead, in further adsorption tower easily
It is adsorbed component i.e. portion of methane, nitrogen, carbon monoxide and major part C2、C2 +Component.
5, it two down (E2D): after one down (E1D) step, closes completion one and rises (E1R) step adsorption tower
Outlet press sequencing valve, the import sequencing valve of first segment equalizer tank 102 is opened, by 102 phase of adsorption tower and first segment equalizer tank
Connection, make to have higher intermediate pressure unadsorbed in adsorption tower containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide,
Carbon dioxide, C2、C2 +Gaseous mixture is put into the first segment that pressure is micro-positive pressure along absorption direction and presses among the first segment of component
Tank 102, adsorption tower and 102 pressure of first segment equalizer tank are of substantially equal at the end of two down (E2D) step is pressed, all in compared with
Low intermediate pressure.It adsorbs forward position in two down (E2D) step to push ahead again, further by easy quilt in adsorption tower
Absorbed component, that is, portion of methane, nitrogen, carbon monoxide and major part C2、C2 +Component absorption.
6, inverse put one (D1): completing the adsorption tower of two down (E2D) step, closes adsorption column outlet end and presses sequencing valve,
Input end inverse put sequencing valve is opened, is made unadsorbed containing a large amount of nitrogen, hydrogen and a small amount of methane, an oxidation in adsorption tower
Carbon, carbon dioxide, C2、C2 +Gaseous mixture is discharged to first segment high pressure with the direction opposite with charging and delays among the first segment of component
Tank 103B is rushed, the pressure in adsorption tower is down to 20KPa or so by lower intermediate pressure.
7, inverse put two (D2): complete inverse put one (D1) step adsorption tower, close first segment high-pressure buffering pot 103B into
Mouthful sequencing valve opens the import sequencing valve of first segment low pressure buffer tank 103A, makes unadsorbed containing a large amount of nitrogen in adsorption tower
Gas, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +Gaseous mixture is among the first segment of component with opposite with charging
Direction be discharged to first segment low pressure buffer tank 103A, the pressure in adsorption tower is down to normal pressure by 20KPa.
8, it evacuates (V): completing the adsorption tower of inverse put two (D2) step, close inverse put sequencing valve, evacuated by switching public
Sequencing valve evacuate up to -90KPa adsorption tower using 2 groups of vacuum pumps, allow easily be adsorbed component i.e. portion of methane, nitrogen,
Carbon monoxide and major part C2、 C2 +Component is parsed from adsorbent, and into first segment heat exchanger 104, it is laggard to be down to room temperature
Enter first segment low pressure buffer tank 103A.
9, evacuate and rinse (VP): proceeding to end in evacuation (V) step, from lockup compressed air line introduce a small amount of gas from
Enter at the top of adsorption tower in evacuation (V) step, from top to bottom adsorption tower rinse when evacuating, to reinforce easily quilt
The effect that absorbed component, that is, portion of methane, nitrogen, carbon monoxide and major part C2, C2+ component are thoroughly parsed from adsorbent
Fruit.
10, it two rises (E2R): completing to evacuate the adsorption tower for rinsing (VP) step, open and rise (E2R) step in two
Adsorption column outlet press the import sequencing valve of sequencing valve and first segment equalizer tank 102, by adsorption tower and first segment equalizer tank
102 connections make the inverse absorption direction of the gas in first segment equalizer tank 102 enter adsorption tower, and two, which rise (E2R) step, presses knot
Adsorption tower and 102 pressure of first segment equalizer tank are of substantially equal when beam, all in lower intermediate pressure.
11, it one rises (E1R): completing two adsorption towers for rising (E2R) step, close the import of first segment equalizer tank 102
Sequencing valve, the outlet for opening the adsorption tower for carrying out equal pressure drop (E1D) step press sequencing valve, two adsorption towers are connected
It is logical, it enters the gas for the adsorption tower for carrying out an equal pressure drop (E1D) and is carrying out an adsorption tower for rising (E1R),
One rise (E1R) step press at the end of two adsorption column pressures it is of substantially equal, all in higher intermediate pressure.
12, final rise (FR): an adsorption tower for rising (E1R) step is completed, with the outlet of the adsorption tower in adsorbed state
The circulation of vital energy in the wrong direction is to being pressurized to adsorptive pressure.It can push absorption forward position to bed feed end by reverse pressurising, and by its concentration forward position
It flattens as far as possible, it is advantageous to next step adsorption operations.Adsorption tower completes a circulate operation after final rise (FR) step, and
It is ready for the adsorption operations of subsequent cycle.
Component i.e. portion of methane, nitrogen, carbon monoxide and big portion are easily adsorbed into first segment low pressure buffer tank 103A
Divide C2、C2 +Component is sent to out-of-bounds as fuel gas.
Whole operation process carries out at a temperature of entering tower unstripped gas.
First segment pressure-variable adsorption (PSA-1) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-1) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-1) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-4) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-1) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-1) technical process, time quantum table (table 1)
First segment pressure-variable adsorption (PSA-1) technical process, time and pressure gauge (table 2)
(2) second segment pressure-variable adsorption (PSA-2) gas fractionation unit 200 and second segment pressure-variable adsorption (PSA-2) technique:
Second segment pressure-variable adsorption (PSA-2) gas fractionation unit 200 includes 6 second segment adsorption tower 201A~201F, 1
201,2 groups of second segment vacuum pumps of platform second segment equalizer tank (A and B are one group, and C is one group), 1 204,1, second segment heat exchanger
The equipment such as second segment high-pressure buffering pot 202A, 1 second segment low pressure buffer tank 202B, valve and pipeline.
Second segment pressure-variable adsorption (PSA-2) technique is used to adsorb among first segment and is easily adsorbed component i.e. in gaseous mixture
Nitrogen, methane, carbon monoxide, carbon dioxide, C2、C2 +Component returns to unstripped gas as recycling gas after parsing, unadsorbed
Second segment centre gaseous mixture containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide enters third section pressure-variable adsorption (PSA-
3) technique.
Second segment pressure-variable adsorption (PSA-2) gas fractionation unit 200 is 6 adsorption towers, 2 adsorption tower adsorption process, often
Seat adsorption tower is successively undergone:
1. absorption (A) → 2. isolation (IS) → 3. one down (E1D) → 4. two down (E2D) → 5. inverse put one (D1) →
6. inverse put two (D2) → 7. evacuates (V) → 8. and evacuates flushing (VP) → 9. 2 liter (E2R) → 10. 1 liter (E1R) → 11.
Final rise (FR).
1, it adsorbs (A): coming from the unadsorbed of first segment pressure-variable adsorption (PSA-1) gas fractionation unit 100 and contain largely
Nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +Gaseous mixture among the first segment of component becomes from second segment
2 absorption tower bottoms that pressure adsorbent equipment 200 enters adsorbed state enter in adsorption tower according to the time sequencing being ranked, and enter
Every adsorption tower of 2 adsorption towers of adsorbed state will undergo adsorption step, adsorption bed active carbon, molecular sieve according to
Under secondary selection absorption, among first segment in gaseous mixture be easily adsorbed component i.e. nitrogen, methane, carbon monoxide, carbon dioxide,
C2、C2 +Component is adsorbed, the unadsorbed second segment centre mixing containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide
Gas outflow at the top of the adsorption tower in adsorbed state, into third section pressure-variable adsorption (PSA-3) gas fractionation unit 300.
When adsorption step proceeds to absorption forward position and reaches adsorption bed and export reserved section initial position, just turn off the charging of adsorption tower tower bottom
Sequencing valve and tower top outlet sequencing valve stop absorption, and adsorption tower tower top outlet end is made nearby also to retain one section of unemployed suction
Attached dose, absorption forward position, which is pushed ahead, when for equal pressure drop is used.
2. isolation (IS): turning off, adsorption tower tower bottom charging sequencing valve and tower top outlet in absorption (A) step are program-controlled
In the state that valve stops absorption, kept for certain time.
Adsorption bed starts to be transferred to regenerative process:
3, one down (E1D): after isolation (IS) step, along absorption direction by elevated pressures in adsorption tower not
The second segment centre gaseous mixture containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide being adsorbed is put into one and has completed
The adsorption tower of (E1R) step is parsed and rises in pressure lower one, it is program-controlled that this needs the outlet for first making two adsorption towers to press
Valve is connected, and the pressure of two adsorption towers is of substantially equal at the end of one down (E1D) step is pressed, all in higher intermediate pressure
Power.Forward position is adsorbed in one down (E1D) step to push ahead, and component i.e. nitrogen, first are easily adsorbed in further adsorption tower
Alkane, carbon monoxide, carbon dioxide, C2、C2 +Component.
4, it two down (E2D): after one down (E1D) step, closes completion one and rises (E1R) step adsorption tower
Outlet press sequencing valve, the import sequencing valve of second segment equalizer tank 201 is opened, by 201 phase of adsorption tower and second segment equalizer tank
Connection makes to have in adsorption tower the unadsorbed containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide of higher intermediate pressure power
Second segment among gaseous mixture along absorption direction enter pressure be micro-positive pressure second segment equalizer tank 201, two down (E2D)
Adsorption tower and 201 pressure of second segment equalizer tank are of substantially equal at the end of step is pressed, all in lower intermediate pressure.Two
Drop (E2D) step in absorption forward position push ahead again, further will be easily adsorbed in adsorption tower component i.e. nitrogen,
Methane, carbon monoxide, carbon dioxide, C2、C2 +Component absorption.
5, inverse put one (D1): completing the adsorption tower of two down (E2D) step, closes adsorption column outlet end and presses sequencing valve,
Input end inverse put sequencing valve is opened, is made unadsorbed containing a large amount of nitrogen, hydrogen and a small amount of methane, an oxidation in adsorption tower
Gaseous mixture is discharged to second segment high-pressure buffering pot 202A with the direction opposite with charging among the second segment of carbon, in adsorption tower
Pressure is down to 20KPa or so by lower intermediate pressure.
6, inverse put two (D2): complete inverse put one (D1) step adsorption tower, close second segment high-pressure buffering pot 202A into
Mouthful sequencing valve opens the import sequencing valve of second segment low pressure buffer tank 202B, makes unadsorbed containing a large amount of nitrogen in adsorption tower
Gas, hydrogen and a small amount of methane, carbon monoxide second segment among gaseous mixture with the direction opposite with charging to be discharged to second segment low
Surge tank 202B is pressed, the pressure in adsorption tower is down to 10KPa by 20KPa.
7, it evacuates (V): completing the adsorption tower of inverse put two (D2) step, close input end inverse put sequencing valve, open and evacuate journey
Valve is controlled, adsorption tower evacuate up to -90KPa using 2 groups of vacuum pumps, allows and is easily adsorbed component i.e. nitrogen, methane, an oxidation
Carbon, carbon dioxide, C2、 C2 +Component is parsed from adsorbent, into second segment heat exchanger 204, is entered after being down to room temperature
Second segment low pressure buffer tank 202B.
8, evacuate and rinse (VP): proceeding to end in evacuation (V) step, from lockup compressed air line introduce a small amount of gas from
Enter at the top of adsorption tower in evacuation (V) step, from top to bottom adsorption tower rinse when evacuating, to reinforce easily quilt
Absorbed component, that is, nitrogen, methane, carbon monoxide, carbon dioxide, C2、C2 +The effect that component is thoroughly parsed from adsorbent.
9, it two rises (E2R): completing to evacuate the adsorption tower for rinsing (VP) step, open and rise (E2R) step in two
Adsorption column outlet presses the import sequencing valve of sequencing valve and second segment equalizer tank 201, by adsorption tower and second segment equalizer tank 201
Connection makes the inverse absorption direction of gas in second segment equalizer tank 201 enter adsorption tower, and two rise (E2R) step and press and terminate
When adsorption tower and 201 pressure of second segment equalizer tank it is of substantially equal, all in lower intermediate pressure.
10, it one rises (E1R): completing two adsorption towers for rising (E2R) step, close the import of second segment equalizer tank 201
Sequencing valve opens the pressure sequencing valve for carrying out the adsorption tower of equal pressure drop (E1D) step, two adsorption towers is connected, are made
The gas for carrying out the adsorption tower of an equal pressure drop (E1D), which enters, is carrying out an adsorption tower for rising (E1R), and one rises
(E1R) two adsorption column pressures are of substantially equal at the end of step is pressed, all in higher intermediate pressure.
11, final rise (FR): an adsorption tower for rising (E1R) step is completed, with the outlet of the adsorption tower in adsorbed state
The circulation of vital energy in the wrong direction is to being pressurized to adsorptive pressure.It can push absorption forward position to bed feed end by reverse pressurising, and by its concentration forward position
It flattens as far as possible, it is advantageous to next step adsorption operations.Adsorption tower completes a circulate operation after final rise (FR) step, and
It is ready for the adsorption operations of subsequent cycle.
Into second segment low pressure buffer tank 202B easily be adsorbed component i.e. nitrogen, methane, carbon monoxide, carbon dioxide,
C2、C2 +Component returns to unstripped gas and recycles.
Whole operation process carries out at a temperature of entering tower unstripped gas.
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time quantum table (table 3)
Second segment pressure-variable adsorption (PSA-2) technical process, time and pressure gauge (table 4)
(3) third section pressure-variable adsorption (PSA-3) gas fractionation unit 300 and third section pressure-variable adsorption (PSA-3) technique:
Third section pressure-variable adsorption (PSA-3) gas fractionation unit 300 includes 6 third section adsorption tower 301A~301F, 1
301,2 groups of first segment vacuum pumps of platform third section equalizer tank (A, B and C are one group, and D, E and F are one group), valve and pipeline etc. are set
It is standby.
Third section pressure-variable adsorption (PSA-3) technique is used to adsorb among second segment and is easily adsorbed component i.e. in gaseous mixture
Nitrogen, methane, carbon monoxide send out battery limit (BL) as dropping a hint after parsing, unadsorbed containing a large amount of hydrogen and a small amount of nitrogen
Gaseous mixture enters the 4th section of pressure-variable adsorption (PSA-4) technique among third section.
Third section pressure-variable adsorption (PSA-3) gas fractionation unit 300 is 6 adsorption towers, 2 adsorption tower adsorption process, often
Seat adsorption tower is successively undergone:
It is taken out 1. adsorbing (A) → 2. and (IS) → 3. one down (E1D) → 4. two down (E2D) → 5. inverse put (D) → 6. being isolated
Empty (V) → 7., which is evacuated, rinses (VP) → 8. 2 liter (E2R) → 9. 1 liter (E1R) → 10. final rise (FR).
1, it adsorbs (A): coming from the unadsorbed of second segment pressure-variable adsorption (PSA-2) gas fractionation unit 200 and contain largely
The second segment centre gaseous mixture of nitrogen, hydrogen and a small amount of methane, carbon monoxide, from third section pressure-variable adsorption (PSA-3) gas point
2 absorption tower bottoms into adsorbed state from device 300 enter in adsorption tower according to the time sequencing being ranked, into suction
Every adsorption tower of 2 adsorption towers of attached state will undergo adsorption step, adsorption bed active carbon, molecular sieve successively
Under selection absorption, being easily adsorbed component i.e. nitrogen, methane, carbon monoxide and be adsorbed in gaseous mixture among second segment, not
Gaseous mixture stream at the top of the adsorption tower in adsorbed state among the third section containing a large amount of hydrogen and a small amount of nitrogen being adsorbed
Out, into the 4th section of pressure-variable adsorption (PSA-4) gas fractionation unit 400.Adsorption step proceeds to absorption forward position and reaches absorption
When bed exports reserved section initial position, just turns off adsorption tower tower bottom charging sequencing valve and tower top in absorption (A) step and go out
Mouth sequencing valve stops absorption, so that adsorption tower tower top outlet end is nearby also retained one section of unemployed adsorbent, when for equal pressure drop
Absorption forward position, which is pushed ahead, to be used.
2. isolation (IS): turning off, adsorption tower tower bottom charging sequencing valve and tower top outlet in absorption (A) step are program-controlled
In the state that valve stops absorption, kept for certain time.
Adsorption bed starts to be transferred to regenerative process:
3, one down (E1D): after isolation (IS) step, along absorption direction by elevated pressures in adsorption tower not
The hydrogen and nitrogen being adsorbed are put into the absorption for having completed to parse and rise in pressure lower one (E1R) step
Tower, this needs the outlet for first making two adsorption towers sequencing valve to be pressed to be connected, two absorption at the end of one down (E1D) step is pressed
The pressure of tower is of substantially equal, all in higher intermediate pressure.Forward position is adsorbed in one down (E1D) step to push ahead,
Component i.e. nitrogen, methane, carbon monoxide are easily adsorbed in further adsorption tower.
4, it two down (E2D): after one down (E1D) step, closes completion one and rises (E1R) step adsorption tower
Outlet press sequencing valve, the import sequencing valve of third section equalizer tank 301 is opened, by 301 phase of adsorption tower and third section equalizer tank
Connection makes higher intermediate pressure is unadsorbed in tower hydrogen and nitrogen be put into pressure micro-positive pressure along absorption direction
Third section equalizer tank 301, adsorption tower and the 301 basic phase of pressure of third section equalizer tank at the end of two down (E2D) step is pressed
Deng all in lower intermediate pressure.Forward position is adsorbed in two down (E2D) step to push ahead again, will more thoroughly be inhaled
Attached Ta Neiyi is adsorbed component i.e. nitrogen, methane, carbon monoxide absorption.
5, inverse put (D): completing the adsorption tower of two down (E2D) step, closes adsorption column outlet end and presses sequencing valve, beats
Input end inverse put sequencing valve is opened, the gas in adsorption tower is discharged to the direction opposite with charging and is out-of-bounds vented.
6, it evacuates (V): completing the adsorption tower of inverse put (D) step, close input end inverse put sequencing valve, open and evacuate journey in advance
Valve is controlled, adsorption tower evacuate up to -90KPa using 2 groups of vacuum pumps, allows and is easily adsorbed component i.e. nitrogen, methane, an oxidation
Carbon is parsed from adsorbent, is discharged to and is out-of-bounds vented.
7, evacuate and rinse (VP): proceeding to end in evacuation (V) step, from lockup compressed air line introduce a small amount of gas from
Enter at the top of adsorption tower in evacuation (V) step, from top to bottom adsorption tower rinse when evacuating, to reinforce easily quilt
The effect that absorbed component, that is, nitrogen, methane, carbon monoxide are thoroughly parsed from adsorbent.
8, it two rises (E2R): completing to evacuate (V) step, adsorption tower has been completed to regenerate, but is in the suction of high negative
Attached tower must pressurising just can be carried out the adsorption operations of next step to adsorptive pressure, open adsorption column outlet and press sequencing valve and the
Adsorption tower is connected to third section equalizer tank 301, makes in third section equalizer tank 301 by the import sequencing valve of three sections of equalizer tanks 301
The inverse absorption direction of gas enter adsorption tower, two rise adsorption tower and third section equalizer tank 301 at the end of (E2R) step press
Pressure is of substantially equal, all in lower intermediate pressure.
9, it one rises (E1R): completing two adsorption towers for rising (E2R) step, close the import of third section equalizer tank 301
Sequencing valve is pressed in sequencing valve, the outlet for opening the adsorption tower for carrying out equal pressure drop (E1D) step, and two adsorption towers is made to be connected
It is logical, it enters the gas for the adsorption tower for carrying out an equal pressure drop (E1D) and is carrying out an adsorption tower for rising (E1R),
One rise (E1R) step press at the end of two adsorption column pressures it is of substantially equal, all in higher intermediate pressure.
10, final rise (FR): an adsorption tower for rising (E1R) step is completed, with the outlet of the adsorption tower in adsorbed state
The circulation of vital energy in the wrong direction is to being pressurized to adsorptive pressure.It can push absorption forward position to bed feed end by reverse pressurising, and by its concentration forward position
It flattens as far as possible, it is advantageous to next step adsorption operations.Adsorption tower completes a circulate operation after final rise (FR) step, and
It is ready for the adsorption operations of subsequent cycle.
Whole operation process carries out at a temperature of entering tower unstripped gas.
Third section pressure-variable adsorption (PSA-3) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-3) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-3) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-4) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-3) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-3) technical process, time quantum table (table 5)
Third section pressure-variable adsorption (PSA-3) technical process, time and pressure gauge (table 6)
(4) the 4th sections of pressure-variable adsorption (PSA-4) gas fractionation units 400 and the 4th section of pressure-variable adsorption (PSA-4) technique:
4th section of pressure-variable adsorption (PSA-4) gas fractionation unit 400 includes 5 the 4th section of adsorption tower 401A~401E, 1
(A and B are one group to 401,1 the 4th section of high-pressure buffering pots of the 4th section of equalizer tank of platform, 402,2 groups of first segment vacuum pumps, C mono-
Group), the equipment such as 1 the 4th section of heat exchanger 404, valve and pipeline.
4th section of pressure-variable adsorption (PSA-4) technique is used to adsorb among third section and is easily adsorbed component nitrogen in gaseous mixture
Gas is returned in unstripped gas after parsing and is recycled, and unadsorbed hydrogen is that the product of purity qualification sends out battery limit (BL).
4th section of pressure-variable adsorption (PSA-4) gas fractionation unit 400 is 5 adsorption towers, 2 adsorption tower adsorption process, often
Seat adsorption tower is successively undergone:
1. absorption (A) → 2. isolation (IS) → 3. one down (E1D) → 4. two down (E2D) → 5. inverse put one (D1) →
6. inverse put two (D2) → 7. evacuates (V) → 8. and evacuates flushing (VP) → 9. 2 liter (E2R) → 10. 1 liter (E1R) → 11.
Final rise (FR).
1, it adsorbs (A): coming from the unadsorbed of third section pressure-variable adsorption (PSA-3) gas fractionation unit 300 and contain largely
Gaseous mixture among the third section of hydrogen and a small amount of nitrogen, from the 4th section of pressure-variable adsorption (PSA-4) gas fractionation unit 400 into
2 absorption tower bottoms for entering adsorbed state enter in adsorption tower according to the time sequencing being ranked, into 2 suctions of adsorbed state
Every adsorption tower of attached tower will undergo adsorption step, adsorb in the successively selection of adsorption bed spy's charcoal KYA0232, molecular sieve
Under, being easily adsorbed component nitrogen and be adsorbed in gaseous mixture among third section, unadsorbed hydrogen is from being in adsorption-like
Outflow at the top of the adsorption tower of state, the product as purity qualification send out battery limit (BL).Adsorption step proceeds to absorption forward position and reaches absorption
When bed exports reserved section initial position, just turn off adsorption tower tower bottom charging sequencing valve and tower top in absorption (A) step
It exports sequencing valve and stops absorption, so that adsorption tower tower top outlet end is nearby also retained one section of unemployed adsorbent, for equal pressure drop
When absorption forward position push ahead and be used.
2. isolation (IS): turning off, adsorption tower tower bottom charging sequencing valve and tower top outlet in absorption (A) step are program-controlled
In the state that valve stops absorption, kept for certain time.
Adsorption bed starts to be transferred to regenerative process:
3, one down (E1D): after isolation (IS) step, along absorption direction by elevated pressures in adsorption tower not
The hydrogen being adsorbed is put into the adsorption tower for having completed to parse and rise in pressure lower one (E1R) step, this is needed
The outlet of two adsorption towers is first set sequencing valve to be pressed to be connected, the pressure of two adsorption towers at the end of one down (E1D) step is pressed
It is of substantially equal, all in higher intermediate pressure.Forward position is adsorbed in one down (E1D) step to push ahead, and is further adsorbed
Component nitrogen is easily adsorbed in tower.
4, it two down (E2D): after one down (E1D) step, closes completion one and rises (E1R) step adsorption tower
Outlet press sequencing valve, the import sequencing valve of the 4th section of equalizer tank 401 is opened, by adsorption tower and the 4th section of 401 phase of equalizer tank
Connection makes the hydrogen that higher intermediate pressure is unadsorbed in tower be put into the 4th section of pressure micro-positive pressure along absorption direction
Equalizer tank 401, adsorption tower and the 4th section of 401 pressure of equalizer tank are of substantially equal at the end of two down (E2D) step is pressed, and all locate
In lower intermediate pressure.Forward position is adsorbed in two down (E2D) step to push ahead again, it more thoroughly will be in adsorption tower
Easily it is adsorbed component nitrogen adsorption.
5, inverse put one (D1): completing the adsorption tower of two down (E2D) step, closes adsorption column outlet end and presses sequencing valve,
Input end inverse put sequencing valve is opened, the unadsorbed hydrogen in adsorption tower is made to be discharged to the 4th with the direction opposite with charging
Section high-pressure buffering pot 402, the pressure in adsorption tower are down to 60KPa or so by lower intermediate pressure.
6, inverse put two (D2): completing the adsorption tower of inverse put one (D1) step, close the 4th section of high-pressure buffering pot 402 into
Mouthful sequencing valve opens the import sequencing valve of second segment low pressure buffer tank 202B, make the unadsorbed hydrogen in adsorption tower with
It feeds opposite direction and is discharged to second segment low pressure buffer tank 202B, the pressure in adsorption tower is down to 20KPa by 60KPa.
7, it evacuates (V): completing the adsorption tower of inverse put two (D2) step, close input end inverse put sequencing valve, open pre- evacuate
Sequencing valve evacuate up to -90KPa adsorption tower using 2 groups of vacuum pumps, allows easily being adsorbed component nitrogen and solve from adsorbent
It separates out, into the 4th section of heat exchanger 404, enters second segment low pressure buffer tank 202B after being down to room temperature.
8, evacuate and rinse (VP): proceeding to end in evacuation (V) step, from lockup compressed air line introduce a small amount of gas from
Enter at the top of adsorption tower in evacuation (V) step, from top to bottom adsorption tower rinse when evacuating, to reinforce being inhaled
The effect that attached component nitrogen is thoroughly parsed from adsorbent.
9, it two rises (E2R): completing to evacuate (V) step, adsorption tower has been completed to regenerate, but is in the suction of high negative
Attached tower must pressurising just can be carried out the adsorption operations of next step to adsorptive pressure, open adsorption column outlet and press sequencing valve and the
Adsorption tower and the 4th section of equalizer tank 401 are connected to by the import sequencing valve of four sections of equalizer tanks 401, are made in the 4th section of equalizer tank 401
The inverse absorption direction of gas enter adsorption tower, two rise adsorption tower and the 4th section of equalizer tank 401 at the end of (E2R) step is pressed
Pressure is of substantially equal, all in lower intermediate pressure.
10, it one rises (E1R): completing two adsorption towers for rising (E2R) step, close the import of the 4th section of equalizer tank 401
Sequencing valve is pressed in sequencing valve, the outlet for opening the adsorption tower for carrying out equal pressure drop (E1D) step, and two adsorption towers is made to be connected
It is logical, it enters the gas for the adsorption tower for carrying out an equal pressure drop (E1D) and is carrying out an adsorption tower for rising (E1R),
One rise (E1R) step press at the end of two adsorption column pressures it is of substantially equal, all in higher intermediate pressure.
11, final rise (FR): an adsorption tower for rising (E1R) step is completed, with the outlet of the adsorption tower in adsorbed state
The circulation of vital energy in the wrong direction is to being pressurized to adsorptive pressure.It can push absorption forward position to bed feed end by reverse pressurising, and by its concentration forward position
It flattens as far as possible, it is advantageous to next step adsorption operations.Adsorption tower completes a circulate operation after final rise (FR) step, and
It is ready for the adsorption operations of subsequent cycle.
Whole operation process carries out at a temperature of entering tower unstripped gas.
4th section of pressure-variable adsorption (PSA-4) technical process, time quantum table (table 7)
4th section of pressure-variable adsorption (PSA-4) technical process, time quantum table (table 7)
4th section of pressure-variable adsorption (PSA-4) technical process, time quantum table (table 7)
4th section of pressure-variable adsorption (PSA-4) technical process, time quantum table (table 7)
4th section of pressure-variable adsorption (PSA-4) technical process, time quantum table (table 7)
4th section of pressure-variable adsorption (PSA-4) technical process, time and pressure gauge (table 8)
Embodiment according to the present invention the present invention is described the description of property and not restrictive, it should be understood that
Without departing from the relevant scope of protection defined by the claims, those skilled in the art can make change
And/or modification.
Claims (9)
1. dropping a hint the method for middle separating-purifying hydrogen from refinery, four sections of pressure swing adsorption gas separation devices are provided, using four sections
Pressure swing adsorption technique sequentially proceeds as follows:
Unstripped gas enters first segment pressure-variable adsorption (PSA-1) gas fractionation unit after pressurizeing by compressor, carries out first segment change
Absorbing process is pressed, first segment moisture trap is initially entered and removes liquid water, it will be in unstripped gas subsequently into first segment desulfurizing tower
Hydrogen sulfide content be reduced to < 20ppm, then enter the absorption that first segment is in adsorbed state from first segment absorption tower bottom
In tower, adsorption bed aluminum oxide, silica gel, special charcoal KYAO232 successively selective absorption under, easy in unstripped gas is inhaled
Attached component, that is, portion of methane, nitrogen, carbon monoxide and major part C2、C2 +Component is adsorbed, high heating value obtained after parsing
Fuel gas be sent to out-of-bounds, it is unadsorbed containing a large amount of nitrogen, hydrogen and a small amount of methane, carbon monoxide, carbon dioxide, C2、C2 +
Gaseous mixture outflow at the top of the adsorption tower in adsorbed state among the first segment of component, into second segment pressure-variable adsorption (PSA-
1) gas fractionation unit；
Gaseous mixture adsorbs tower bottom from second segment among into the first segment of second segment pressure-variable adsorption (PSA-2) gas fractionation unit
It is in into second segment in the adsorption tower of adsorbed state, second segment pressure swing adsorption technique is carried out, in adsorption bed active carbon, molecule
Under the successively selection absorption of sieve, component i.e. nitrogen, methane, carbon monoxide, dioxy are easily adsorbed in gaseous mixture among first segment
Change carbon, C2、C2 +Component is adsorbed, and is recycled after parsing back to unstripped gas, unadsorbed containing a large amount of nitrogen, hydrogen and few
Gaseous mixture outflow at the top of the adsorption tower in adsorbed state among the second segment of methane, carbon monoxide is measured, is become into third section
Pressure absorption (PSA-3) gas fractionation unit；
Gaseous mixture adsorbs tower bottom from third section among into the second segment of third section pressure-variable adsorption (PSA-3) gas fractionation unit
It is in into third section in the adsorption tower of adsorbed state, third section pressure swing adsorption technique is carried out, in adsorption bed active carbon, molecule
Under the successively selection absorption of sieve, being easily adsorbed component i.e. nitrogen, methane, carbon monoxide and be adsorbed in gaseous mixture among second segment
Get off, battery limit (BL) is sent out as dropping a hint after parsing, among the unadsorbed third section containing a large amount of hydrogen and a small amount of nitrogen
Gaseous mixture outflow at the top of the adsorption tower in adsorbed state, into the 4th section of pressure-variable adsorption (PSA-4) gas fractionation unit；
Gaseous mixture is from the 4th section of absorption tower bottom among into the third section of the 4th section of pressure-variable adsorption (PSA-4) gas fractionation unit
Into in the 4th section of adsorption tower in adsorbed state, the 4th section of pressure swing adsorption technique is carried out, in adsorption bed spy's charcoal
KYAO232, molecular sieve successively selection absorption under, being easily adsorbed component nitrogen and be adsorbed down in gaseous mixture among third section
Come, recycled after parsing back to unstripped gas, the outflow at the top of the adsorption tower in adsorbed state of unadsorbed hydrogen is made
Battery limit (BL) is sent out for the product of purity qualification.
2. described in accordance with the claim 1 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that first segment becomes
Pressure absorbing process is 6 adsorption towers, 2 adsorption tower adsorption process, and the unstripped gas into 2 absorption tower bottoms of adsorbed state is pressed
The fixed time sequencing of phototypesetting successively enters in adsorption tower.
3. according to claim 1 or 2 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that first
The sequence of the regenerative process of adsorption tower of the section in adsorbed state are as follows:
Forward bleed off pressure (PP) → isolation (IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two (D2)
→ evacuating (V) →, which evacuates, rinses 1 (E1R) of (VP) → pressure equilibrium liter 2 (E2R) → pressure equilibriums liter → final boosting (FR).
4. described in accordance with the claim 1 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that second segment becomes
Pressure absorbing process is 6 adsorption towers, 2 adsorption tower adsorption process, and the unstripped gas into 2 absorption tower bottoms of adsorbed state is pressed
The fixed time sequencing of phototypesetting successively enters in adsorption tower.
5. according to claim 1 or 2 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that second
The sequence of the regenerative process of adsorption tower of the section in adsorbed state are as follows:
(IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two (D2) → evacuation (V) → evacuation is isolated
It rinses (VP) → bis- and rises (E2R) → mono- liter (E1R) → final rise (FR).
6. described in accordance with the claim 1 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that third section becomes
Pressure absorbing process is 6 adsorption towers, 2 adsorption tower adsorption process, and the unstripped gas into 2 absorption tower bottoms of adsorbed state is pressed
The fixed time sequencing of phototypesetting successively enters in adsorption tower.
7. according to claim 1 or 2 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that third
The sequence of the regenerative process of adsorption tower of the section in adsorbed state are as follows:
(IS) → one down (E1D) → two down (E2D) → inverse put (D) → evacuation (V) → evacuation is isolated and rinses (VP) → bis-
It rises (E2R) → mono- and rises (E1R) → final rise (FR).
8. described in accordance with the claim 1 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that the 4th section of change
Pressure absorbing process is 5 adsorption towers, 2 adsorption tower adsorption process, and the unstripped gas into 2 absorption tower bottoms of adsorbed state is pressed
The fixed time sequencing of phototypesetting successively enters in adsorption tower.
9. according to claim 1 or 2 drop a hint the method for middle separating-purifying hydrogen from refinery, which is characterized in that the 4th
The sequence of the regenerative process of adsorption tower of the section in adsorbed state are as follows:
(IS) → one down (E1D) → two down (E2D) → inverse put one (D1) → inverse put two (D2) → evacuation (V) → evacuation is isolated
It rinses (VP) → bis- and rises (E2R) → mono- liter (E1R) → final rise (FR).
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| CN112919414A (en) * | 2021-03-15 | 2021-06-08 | 西南化工研究设计院有限公司 | Low-pressure flushing regeneration pressure swing adsorption hydrogen purification system and hydrogen purification method |
| CN113830735A (en) * | 2021-11-23 | 2021-12-24 | 清华大学 | Medium-temperature purification hydrogen production method and equipment for reforming hydrocarbon fuel and fuel cell energy supply system |
| CN113830735B (en) * | 2021-11-23 | 2022-07-12 | 清华大学 | Medium-temperature purification hydrogen production method and equipment for reforming hydrocarbon fuel and fuel cell energy supply system |
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