CN207330355U - Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas - Google Patents
Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas Download PDFInfo
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- CN207330355U CN207330355U CN201720846393.7U CN201720846393U CN207330355U CN 207330355 U CN207330355 U CN 207330355U CN 201720846393 U CN201720846393 U CN 201720846393U CN 207330355 U CN207330355 U CN 207330355U
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Abstract
It the utility model is related to a kind of purifying hydrogen of hydrogen from coal gas and prepare high-purity and superelevation pure hydrogen device, belong to the chemical field of coal chemical industry preparing synthetic gas.The technical solution of the utility model is as follows：Including filtration apparatus, adsorbent equipment, control system and spark arrester；The adsorbent equipment includes adsorption tower, along putting tower, program-controlled pneumatic valve, hydrogen gas buffer；The control system includes central control unit and the program-controlled pneumatic valve, control valve, monitor supervision platform, the pressure transmitter that are connected respectively with central control unit；The device of purifying hydrogen provided by the utility model, purification efficiency is high, and installation cost is low, purification condition is simple, can carry out purifying production process on a large scale.
Description
Technical field
The utility model belongs to the chemical field of coal chemical industry preparing synthetic gas, and in particular to the dress of purifying hydrogen of hydrogen from coal gas
Put.
Background technology
At present, large-scale industry hydrogen manufacturing in China's is water electrolysis gas, methanol decomposition hydrogen manufacturing and day using most common technology
Right gas process for making hydrogen.Technological process is mainly made of raw material gas disposal, steam conversion, CO conversion and hydrogen purification etc., but should
For technology there are hydrogen manufacturing cost is excessive, flue gas exit temperature is high, wastes a large amount of thermal energy；Reaction temperature is excessive, it is necessary to expensive height
Warm reactor, in addition can discharge great amount of carbon dioxide, the shortcomings of being adversely affected to weather, therefore be not suitable for large-scale industry system
The demand of hydrogen production.
Utility model content
To make up the deficiencies in the prior art, the utility model provides a kind of device of the purifying hydrogen of hydrogen from coal gas, can be right
Impurity in coal gas carries out depth abjection, reduces production cost and reduces the discharge of exhaust gas.
The technical solution of the utility model is as follows：Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen dress from coal gas
Put, including filtration apparatus, adsorbent equipment, control system and spark arrester；The adsorbent equipment includes adsorption tower, along putting tower, journey
Control operated pneumatic valve, hydrogen gas buffer；The control system includes central control unit and connects respectively with central control unit
Program-controlled pneumatic valve, control valve, monitor supervision platform, the pressure transmitter connect；The adsorption tower connects hydrogen by pipeline and delays
Rush tank, hydrogen outlet；The adsorption tower includes adsorption tower A, adsorption tower B, adsorption tower C, adsorption tower D, adsorption tower E, adsorption tower
F, adsorption tower circulation press adsorption tower, desorption adsorption tower to use as reactor adsorption tower, and the adsorption tower A, inhale
Attached tower B, adsorption tower C, adsorption tower D, adsorption tower E, adsorption tower F are connected by program-controlled pneumatic valve.
Further, the filtration apparatus is industrial filter.
Further, the filtration apparatus is two groups.
Further, adsorbent is equipped with the adsorption tower, the adsorbent includes silica gel, activated carbon and molecule
Sieve.
The beneficial effects of the utility model are as follows：The device of purifying hydrogen provided by the utility model, purification efficiency is high, dress
It is set to that low, purification condition is simple, can carry out purifying production process on a large scale.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is partial enlarged view at I in Fig. 1；
Fig. 3 is partial enlarged view at II in Fig. 1；
Fig. 4 is partial enlarged view at III in Fig. 1；
Fig. 5 is absorption-desorption process schematic in normal pressure absorption；
Fig. 6 is absorption-desorption process schematic in vacuum desorption；
Wherein：1st, filtration apparatus, 2, adsorption tower A, 3, adsorption tower B, 4, adsorption tower C, 5, adsorption tower D, 6, adsorption tower E, 7,
Adsorption tower F, 8, along putting tower, 9, hydrogen gas buffer, 10, hydrogen outlet A, 11, hydrogen outlet B, 12, spark arrester, KC305A,
KC301A、 KC301A、KC302C、KC304A、KC310、KC303A、KC303D、KC303E、KC306A、KC303C、KC303D、
KC302A, KC302E, KC306A, KC304A are program-controlled pneumatic valve.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas, including filtration apparatus 1,
Adsorbent equipment, control system and spark arrester 12；The adsorbent equipment includes adsorption tower, along putting tower 8, program-controlled pneumatic valve, hydrogen
Gas surge tank 9；The control system includes central control unit and the program-controlled pneumatic being connected respectively with central control unit
Valve, control valve, monitor supervision platform, pressure transmitter；The adsorption tower connects hydrogen gas buffer 9 by pipeline, hydrogen goes out
Mouth 11；The adsorption tower includes adsorption tower A 2, adsorption tower B 3, adsorption tower C 4, adsorption tower D 5, adsorption tower E 6, absorption
Tower F 7, the adsorption tower A 2 are reactor, and the adsorption tower B 3, adsorption tower C 4, adsorption tower D 5, adsorption tower E 6 are used
In pressing, the adsorption tower F 7 is used to desorb.The filtration apparatus 1 is industrial filter.The filtration apparatus 1 is
Two groups.Adsorbent is equipped with the adsorption tower, the adsorbent includes silica gel, activated carbon and molecular sieve.It is at A in Fig. 1
Air intake, is pending coal gas entrance at B.
When being purified using the device of the utility model, by two process groups of pretreatment process and pressure-variable adsorption process
Into.Unstripped gas initially enters pretreatment process, can be by a large amount of solids in gas at a temperature of Process Gas using filtration apparatus 1
The impurity such as grain, oil, water is removed using filter core；Subsequently into the O in pressure-variable adsorption process deep removal gas2、H2O、CO2、
CH4、 N2, the impurity such as CO, CnHm.The adsorbent imurity-removal that pressure-variable adsorption process uses has certain capacity, when adsorbent absorbs
After impurity reaches saturation, decompression desorption and regeneration can be carried out to it, it is recovered absorption property.Pressure-variable adsorption process is pure using 6 towers
Change flow, wherein 1 is then pressed respectively as reactor work (absorption impurity), another 4 reactors, remaining 1 progress
Low pressure desorbs, and such 6 reactors work alternatively and regeneration, so that the continuous separation and purification to unstripped gas can be realized.
Pressure-variable adsorption process is specifically divided into following steps：
(1) as shown in figure 5, normal pressure desorption technique procedure declaration is as follows：
Boost process (A-B)：The minimum pressure P1 that adsorbent bed after inverse put, flushing, desorption, regeneration is in process is (big
Air pressure), the impurity absorption amount of adsorbent is also at minimum point Q1 (A points) in bed.Progressively boosted with product gas on this condition
To adsorptive pressure P3, due to being free of the adsorbable impurity of adsorbent in product gas, adsorbing contaminant in bed in the process
Measure constant, adsorbance is Q1 (B points)；
Adsorption process (B-C)：Unstripped gas constantly enters adsorbent bed, while output products gas group under constant adsorptive pressure
Point, the adsorbance of the impurity composition in adsorption bed is stepped up, and when reaching certain adsorbance Q3, (C points) stops entering former
Expect gas, absorption terminates.At this time in adsorbent bed still reserve some unadsorbed impurity adsorbent (such as adsorbent all absorption it is miscellaneous
Matter, adsorbance is up to Q4 (C ') point).
It is suitable to let off journey (C-D)：Pressure is reduced along the direction for entering unstripped gas output products, the gas of outflow is still product group
Point, boost or rinse for other adsorbent beds.In the process, constantly decline with pressure in bed, the impurity on adsorbent is not by
Disconnected desorption, the impurity of desorption continues by the adsorbent absorption of inabundant adsorbing contaminant again, therefore impurity does not leave adsorbent bed, bed
Interior occlusion is constant, and when adsorbent bed is depressured to D points, adsorbent is all taken by impurity in bed, pressure P2.
Inversely bleed off pressure (D-E)：Start, against the direction discharge gas for entering unstripped gas output products gas, to reduce pressure, directly
Pressure P1 (being generally near atmospheric pressure) in adsorption bed is identical with the external world.At this time, it is that pressure is minimum in pressure-swing absorption process
Period, the impurity largely adsorbed in bed discharges bed with air-flow, and the residual quantity of impurity is the absorption under the pressure in bed
The saturation hold-up Q2 of agent；
Flushing process (E-A)：According to the adsorption isotherm of measure, adsorbent bed still some impurity absorption under pressure P1
On the sorbent, it is impossible to desorption completely.In order to make this partial impurities desorb as far as possible, it is desirable to make in adsorbent bed impurities partial pressure into
One step reduces.Herein using other adsorbent bed product component that forward pressure reduction discharges, carried out under process minimum pressure P1
Back flush, constantly reduces impurities partial pressure, so that impurity desorbs as far as possible, and takes adsorbent bed out of with gas is rinsed.Through one
When determining the minimum point Q1 during the impurity absorption amount after degree is rinsed in bed is reduced to, regeneration termination.So far, bed is completed
One absorption-desorption-regenerative process, again boosting carry out next circulation.
(2) as shown in fig. 6, vacuum desorption technical process is described as follows：
Boost process (A-B)：Adsorbent bed after vacuum desorption regenerates is in the minimum pressure P0 (atmospheric pressure) of process, bed
The impurity absorption amount of adsorbent is also at minimum point Q1 (A points) in layer.On this condition adsorption pressure is progressively boosted to product gas
Power P3, due to being free of the adsorbable impurity of adsorbent in product gas, adsorbing contaminant amount is constant in bed in the process,
Adsorbance is Q1 (B points)；
Adsorption process (B-C)：Unstripped gas constantly enters adsorbent bed, while output products gas group under constant adsorptive pressure
Point, the adsorbance of the impurity composition in adsorption bed is stepped up, and when reaching certain adsorbance Q3, (C points) stops entering former
Expect gas, absorption terminates.At this time in adsorbent bed still reserve some unadsorbed impurity adsorbent (such as adsorbent all absorption it is miscellaneous
Matter, adsorbance is up to Q4 (C ' points)；
It is suitable to let off journey (C-D)：Pressure is reduced along the direction for entering unstripped gas output products, the gas of outflow is still product group
Point, boost or rinse for other adsorbent beds.In the process, constantly decline with pressure in bed, the impurity on adsorbent is not by
Disconnected desorption, the impurity of desorption continues by the adsorbent absorption of inabundant adsorbing contaminant again, therefore impurity does not leave adsorbent bed, bed
Interior impurity hold-up is constant, and when adsorbent bed is depressured to D points, adsorbent is all taken by impurity in bed, pressure P2；
Inversely bleed off pressure (D-E)：Start, against the direction discharge gas for entering unstripped gas output products gas, to reduce pressure, directly
Pressure P1 (being generally near atmospheric pressure) in adsorption bed is identical with the external world.At this time, it is that pressure is minimum in pressure-swing absorption process
Period, the impurity largely adsorbed in bed discharges bed with air-flow, and the residual quantity of impurity is the absorption under the pressure in bed
The saturation hold-up Q2 of agent；Desorption pneumatic transmission to out-of-bounds make fuel gas use (but since the hydrogen content in desorption gas is very high,
The desorption gas in 10-20 desorption cycles will be recycled, back into the entrance of compressor).
Flushing process (E-A)：According to the adsorption isotherm of measure, adsorbent bed still some impurity absorption under pressure P1
On the sorbent, it is impossible to desorption completely.In order to make this partial impurities desorb as far as possible, it is desirable to make impurities partial pressure in bed further
Reduce.Reducing impurities partial pressure using the method for vacuum pumping herein desorbs impurity and takes adsorbent bed out of with air is taken out, and aspirates
After a certain period of time, pressure is P0 in bed, when impurity hold-up is reduced to the minimum flow Q1 of process, regeneration termination, so far, adsorbent bed
An Adsorption and desorption process is completed, boosting again enters next circulation.
When the utility model purifies coal gas, using normal pressure desorption technique, above-mentioned vacuum desorption process be used for pair
The process is explained.
The utility model uses the S7 series of PLC of Siemens companies as centralized control unit, using touch control screen pair
Whole production process is implemented to be monitored and controlled.Possess automatic regeneration timing control (valve switch, temperature control), it is automatic,
The functions such as manual operation, running state monitoring.Remote monitoring can be achieved or access the central control system (MODBUS) of client, and
Dual control platform can be achieved.
Control function is described as follows：
1) timing control
The timing control functional requirement of the present apparatus carries out whole automatic switch valves reliable switch control, ensures each automatic
The condition and order open and close that switch valve gives according to technique, realize the normal switch operating of PSA devices.All program switch valves
By solenoid-driven.Color touch control display screen can monitor, show the action situation of all automatic valves at any time, and can be to certainly
Dynamic valve failure carries out automatic alarm and interlocking processing.
2) pressure monitor
The present apparatus is monitored unstripped gas, product atmospheric pressure using pressure transmitter, and is able to by display control screen
Display.
3) remote diagnosis control function
The control system of the present apparatus can carry out improve intuitively technological process monitoring and Dynamic Announce, control system have
Fault self-diagnosis function, historical trend writing function, accident record function, operation note function, autoreport printing function, this
Device is additionally provided with long-range diagnosis and control function, if system operation is abnormal, user can notify general headquarters, and control system is accessed
The control network (needing user to provide password) of general headquarters, realizes the remote control and fault diagnosis of system.
Alarm explanation：The feedback signal obtained as PLC is abnormal, and the time for being continued above set alarming value exceedes
Anti- ripple is delayed (avoiding fluctuation from causing false alarm), and device will send alarm signal.Alarm indication interface can be manually entered, according to carrying
Show failure judgement point.All warning messages can be all recorded in alarm list.Device still keeps purification aerogenesis state during alarm.
Interlock explanation：Interlocked operation is after alarm, or is simultaneously emitted by alarming.Part alarm signal is within the time of setting
Do not handled, or signal is exceeded reaches set interlocking value, device will according to circumstances take corresponding interlocking side automatically
Case, to avoid the generation of peril.Non- cross-line interlocking, will not interrupt aerogenesis, but regeneration step etc. will stop.
Above automatic control schemes reliably ensure that the safety of filler regeneration effect and whole system.
Such as Fig. 1, now by taking adsorption tower A 2 undergoes the operating mode of step in one cycle as an example, to this section of pressure swing adsorption technique
Process illustrates：
(1) pre-process：It is commercially available using industrial filter, can be by a large amount of solids in gas at a temperature of Process Gas
The impurity such as grain, oil, water is removed using proprietary filter core；
(2) adsorb
Program-controlled pneumatic valve KC305A and KC301A are opened, the unstripped gas by pretreatment passes through program-controlled pneumatic valve
KC301A enters adsorption tower A 2, CO in unstripped gas2Component is adsorbed by adsorbent under adsorptive pressure, titanium dioxide not to be adsorbed
The components such as carbon, ethane, methane, enter manifold containing methane gas to outside battery limit (BL) by program-controlled pneumatic valve KC301A, work as CO2Absorption
When forward position reaches adsorption tower a certain position, program-controlled pneumatic valve KC301A, KC305A are closed, unstripped gas stops input adsorption tower A
2, pressure when the interior holding of tower is adsorbed.
The balanced drop of (2) pressure
After 2 adsorption steps of adsorption tower A stop, that is, program-controlled pneumatic valve KC302A and KC302C are opened, makes adsorption tower A 2
The port of export is connected with just terminating secondary 4 ports of export of adsorption tower C of boosting step, in adsorption tower A 2 dead space gas by
2 ports of export of adsorption tower A flow into adsorption tower C 4 through program-controlled pneumatic valve KC302A, KV302C from 2 ports of export of adsorption tower A.Should
At the end of step, two pressure tower of A, C substantially achieves balance.
(3) the balanced drop of secondary pressure
After the balanced drop step of 2 pressure of adsorption tower A stops, that is, program-controlled pneumatic valve KC304A and KC310 are opened, is made
2 ports of export of adsorption tower A are connected with just terminating 9 port of export of hydrogen gas buffer of boosting step, dead space gas in adsorption tower A 2
Body, through program-controlled pneumatic valve KC304A, KC310, hydrogen gas buffer is flowed into from 2 ports of export of adsorption tower A by 2 ports of export of adsorption tower A
9.At the end of the step, adsorption tower A 2 is with 9 pressure of hydrogen gas buffer substantially up to balance.
(4) pressure is balanced three times drops
After the balanced drop step of 2 secondary pressures of adsorption tower A stops, program-controlled pneumatic valve KC304A, KC310 are closed, then
Program-controlled pneumatic valve KC303A and KC303D are opened, makes 2 ports of export of adsorption tower A and just terminates the adsorption tower D of four boosting steps
5 ports of export are connected, in adsorption tower A 2 dead space gas by 2 ports of export of adsorption tower A through program-controlled pneumatic valve KC303A and
KC303D, D is flowed into from 2 ports of export of adsorption tower A.At the end of the step, 5 pressure of adsorption tower A 2 and adsorption tower D substantially reaches
Balance.
The balanced drop of (5) four pressure
After adsorption tower A 2 presses balanced drop step to stop three times, opening program-controlled pneumatic valve KC303A and KC303E makes absorption
2 ports of export of tower A are connected with just terminating 6 ports of export of adsorption tower E of four boosting steps, in adsorption tower A 2 dead air body by
2 ports of export of adsorption tower A flow into adsorption tower E 6 through program-controlled pneumatic valve KC303A and KC303E from 2 ports of export of adsorption tower A.Should
At the end of step, adsorption tower A 2 basically reaches balance with 6 pressure of adsorption tower E.
(6) inversely bleed off pressure
After 2 equal voltage drop steps of adsorption tower A, program-controlled pneumatic valve KC303A and KC303E are closed, opens program-controlled gas
Movable valve KC306A, CO in tower2The circulation of vital energy in the wrong direction is directly put to hydrogen gas buffer to emptying, reverse gas by program-controlled pneumatic valve KC306A
9, the CO that major part is adsorbed in the process2Component has been desorbed out, and adsorbent obtains a degree of regeneration.Inverse put step
At the end of, pressure should be substantially close to normal pressure in adsorption tower A 2.
(7) four pressure are balanced to be risen
After adsorption tower A 2 completes evacuation desorption process, preparation starts to boost.Program-controlled valve KC306A is closed, opens journey
Operated pneumatic valve KC303A and KC303C are controlled, is boosted using the gas in adsorption tower C 4 to adsorption tower A 2.
(8) pressure is balanced three times rises
After adsorption tower A 2 completes four pressure equilibrium boost process, prepare further boosting.Close program-controlled pneumatic valve
KC303C, opens program-controlled pneumatic valve KC303D and enters adsorption tower A 2, adsorption tower A 2 is pressed.
(9) secondary pressure is balanced rises (E2R)
Program-controlled pneumatic valve KC303A is closed, program-controlled pneumatic valve KC304A is opened, makes 2 ports of export of adsorption tower A and hydrogen
Buffering gas tank 9 is connected.Gas enters adsorption tower A 2 through program-controlled pneumatic valve KC304A in hydrogen buffering gas tank 9, to adsorption tower
A 2 is pressed, and after the step, surge tank, 2 pressure of adsorption tower A are of substantially equal.
(10) pressure are balanced to rise (EIR)
After adsorption tower A 2 completes secondary pressure equilibrium boost process, prepare further boosting.Close program-controlled pneumatic valve
KC304A, opens program-controlled pneumatic valve KC302A, KC302E, 2 ports of export of adsorption tower A is connected with 6 ports of export of adsorption tower E
It is logical.Gas enters adsorption tower A 2 through program-controlled pneumatic valve KC302A, KC303E in adsorption tower E 6, adsorption tower A 2 is carried out
Press, after the step, adsorption tower E 6,2 pressure of adsorption tower A are of substantially equal.
(11) finally boosting (FR)
After adsorption tower A 2 undergoes pressure step, tower pressure interior force is also not up to the operating pressure of adsorption step.At this moment journey is closed
Operated pneumatic valve KC302E is controlled, opens KC308, by filling control valve HV-301 eventually, portion gas is drawn to inhaling by product feed channel
Attached tower A 2 is finally boosted, untill 2 pressure of adsorption tower A substantially achieves adsorptive pressure.So far, adsorption tower A 2 exists
Each step in one cycle all terminates, and is and then circulated next time.
Claims (4)
1. purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas, it is characterised in that including filtration apparatus
(1), adsorbent equipment, control system and spark arrester (12)；
The adsorbent equipment includes adsorption tower, along putting tower (8), program-controlled pneumatic valve, hydrogen gas buffer (9)；
The control system include central control unit and be connected respectively with central control unit program-controlled pneumatic valve,
Control valve, monitor supervision platform, pressure transmitter；
The adsorption tower connects hydrogen gas buffer (9), hydrogen outlet A (11) by pipeline,
The adsorption tower includes adsorption tower A (2), adsorption tower B (3), adsorption tower C (4), adsorption tower D (5), adsorption tower E (6), suction
Attached tower F (7), adsorption tower circulation press adsorption tower, desorption adsorption tower to use as reactor adsorption tower,；
The filtration apparatus (1) by pipeline, program-controlled pneumatic valve respectively with adsorption tower A (2), adsorption tower B (3), adsorption tower C
(4), adsorption tower D (5), adsorption tower E (6), adsorption tower F (7) connections, the adsorption tower A (2), adsorption tower B (3), adsorption tower C
(4), adsorption tower D (5), adsorption tower E (6), adsorption tower F (7) by pipeline, the connection of program-controlled pneumatic valve along putting tower (8), spark arrester
(12)。
2. purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas as claimed in claim 1, its feature exists
In the filtration apparatus (1) is industrial filter.
3. purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas as claimed in claim 1, its feature exists
In the filtration apparatus (1) is two groups.
4. purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas as claimed in claim 1, its feature exists
In the adsorption tower is interior to be equipped with adsorbent, and the adsorbent includes silica gel, activated carbon and molecular sieve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720846393.7U CN207330355U (en) | 2017-07-13 | 2017-07-13 | Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720846393.7U CN207330355U (en) | 2017-07-13 | 2017-07-13 | Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207330355U true CN207330355U (en) | 2018-05-08 |
Family
ID=62377170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720846393.7U Active CN207330355U (en) | 2017-07-13 | 2017-07-13 | Purifying hydrogen of hydrogen prepares high-purity and superelevation pure hydrogen device from coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207330355U (en) |
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2017
- 2017-07-13 CN CN201720846393.7U patent/CN207330355U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A device for purifying hydrogen gas from coal to produce high-purity and ultra-high-purity hydrogen gas Effective date of registration: 20230504 Granted publication date: 20180508 Pledgee: China Construction Bank Corporation Dalian high tech Industrial Park sub branch Pledgor: DALIAN ZHONGDING CHEMICAL Co.,Ltd. Registration number: Y2023210000093 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |