CN108619858A - A kind of method and apparatus suitable for promoting PSA device cycle of oparation - Google Patents
A kind of method and apparatus suitable for promoting PSA device cycle of oparation Download PDFInfo
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- CN108619858A CN108619858A CN201810522863.3A CN201810522863A CN108619858A CN 108619858 A CN108619858 A CN 108619858A CN 201810522863 A CN201810522863 A CN 201810522863A CN 108619858 A CN108619858 A CN 108619858A
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- gas
- oparation
- separator
- washing
- liquid separation
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/10—Venturi scrubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/10—Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
- B01D2247/107—Means for removing the washing fluid dispersed in the gas or vapours using an unstructured demister, e.g. a wire mesh demister
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of method and apparatus suitable for promoting PSA device cycle of oparation, it is that Venturi scrubber and separator are added between the adsorption tower and vacuum pump in PSA techniques, depth washing is carried out to stripping gas and is carried out dehydrating to washing rear stripping gas, which is broadly divided into three steps：Depth washing is carried out to stripping gas using efficient Venturi scrubber first, the absorbent powder of small particle is transferred in cleaning solution；Thereafter gas-liquid separation is carried out in the separator, and after carrying out gas-liquid separation, the absorbent powder being transferred in washing process in cleaning solution is also removed therewith；Finally enter vacuum pump with the stripping gas after gas-liquid separation by washing, it is outer after arranging or recycle outside cleaning solution to arrange.This method can effectively prevent the vacuum pump shutdown problem caused by stripping gas Entrained adsorbent solid powder, can promote the cycle of oparation of PSA devices.
Description
Technical field
The present invention relates to gas purification technique fields, more particularly to a kind of to be suitable for promoting PSA device cycle of oparation
Method and apparatus.
Background technology
Pressure-variable adsorption abbreviation PSA, is the technical process purified to admixture of gas, which is with porous solid
Based on substance (adsorbent) interior surface is to the physical absorption of gas molecule, what is worked between two kinds of pressure states is reversible
Physical adsorption process, it is that have larger adsorption capacity under high pressure according to impurities from mixed gas component, under low pressure again
With smaller adsorption capacity, and ideal component H2 then either high pressure or low pressure all originals with smaller adsorption capacity
Reason.Under high pressure, increase impurities partial pressure so as to by its it is more as possible be adsorbed on adsorbent, to reach high product purity.
The desorption or regeneration of adsorbent carry out under low pressure, the residual volume of impurity on adsorbent are reduced to the greatest extent, in order in next circulation
Adsorbing contaminant again.
In recent years, in order to improve the overall efficiency of PSA devices, the adsorbent that PSA techniques use in constantly more new development,
Ever-reduced grain diameter is conducive to increase adsorbent specific surface area；Meanwhile in desorption process, dropped using vacuum pump
Pressure or decompression operation, promote desorption, to make adsorbent reactivation to greatest extent, to improve absorption and the solution of adsorbent
Efficiency is inhaled, and then improves whole efficiency and product gas quality.
Small particle absorbent particles be easy to cause Vapor Entrainment phenomenon, and entrained adsorbent particles cause subsequently in stripping gas
Vacuum pump can not operate normally, to affect the cycle of oparation of PSA devices.Increase precision before vacuum pump currently, having
Filter is true to ensure using two sets of filter parallel connection handover operations to prevent absorbent particles to be brought into the case of vacuum pump
Sky pump can be continuously run, and actual use situation is unsatisfactory, and accurate filter pressure drop is larger, and switching frequency is excessively high, operation is tired
Difficulty, the program can not good solving practical problems.
Therefore, it is necessary to use method simple in structure, treatment effeciency is high, processing cost is low to existing PSA technologies stream
Journey is improved.
Invention content
To overcome above-mentioned the deficiencies in the prior art, the present invention to provide a kind of suitable for promoting PSA device cycle of oparation
Method.
The used technical solution of the present invention is that literary mound is added between the adsorption tower and vacuum pump in PSA techniques
In washer and separator, the absorbent powder in stripping gas depth washing and carried out at dehydration to washing rear stripping gas
Reason, the process are broadly divided into three steps：The absorbent powder in stripping gas is carried out using efficient Venturi scrubber first
Depth is washed, and the absorbent powder of small particle is transferred in cleaning solution；Thereafter gas-liquid separation is carried out in the separator, into promoting the circulation of qi
After liquid separation, the absorbent powder being transferred in washing process in cleaning solution is also removed therewith；It is finally gentle by washing
Stripping gas after liquid separation enters vacuum pump, outer row after arranging or recycle outside cleaning solution.
To achieve the goals above, the present invention provides a kind of method suitable for promoting PSA device cycle of oparation,
Specific technical solution is as follows：
A method of it is suitable for promoting PSA device cycle of oparation, includes the following steps：
(1) depth washing is carried out to the absorbent powder in stripping gas using efficient Venturi scrubber first, by granule
The absorbent powder of diameter is transferred in cleaning solution；
(2) it carries out gas-liquid separation in the separator thereafter, after carrying out gas-liquid separation, cleaning solution is transferred in washing process
In absorbent powder be also removed therewith；
(3) finally enter vacuum pump with the stripping gas after gas-liquid separation by washing, after arranging or recycle outside cleaning solution
Outer row.
The beneficial effects of the present invention are：
(1) increase venturi wet scrubber and separator before vacuum pump, can to particle of the grain size not less than 0.5 μm into
Row efficiently removal, washer continuous operation are not necessarily to handover operation；
(2) vacuum pump can continuous and steady operation, the PSA device overall operation periods get a promotion.
Description of the drawings
Fig. 1 is the original PSA process flow charts in embodiment 1；
Fig. 2 is that entrained solid particle size is distributed measured result figure in stripping gas；
Fig. 3 is the modified technique flow chart that PSA device cycle of oparation is promoted in embodiment 1；
Fig. 4 is the Venturi scrubber and cyclone separator arrangement schematic diagram in embodiment under optimal cases；
Fig. 5 is Venturi scrubber and separator process flow chart in embodiment；
Fig. 6 is single-stage Venturi scrubber and cyclone separator arrangement schematic diagram.
In figure：Level-one venturi inlet 1, level-one venturi fluid injection nozzle 2, level-one Venturi throat 3, two level venturi enters
Mouth 4, two level venturi fluid injection nozzle 5, two level Venturi throat 6, washer and separator connecting flange 7, replenisher entrance 8,
Skirt 9, separator leakage fluid dram 10, interface of the level gauge 11, interface of the level gauge 12, inertial separation distributor 13, air-spreading disk 14, pressure difference
Interface 15 is counted, gas liquid high-efficiency detaches internals 16, differential manometer interface 17, separator outlet 18, stripping gas 19, replenisher 20, differential pressure
Meter 21, liquid level gauge 22, circulating pump 23, gas 24 after purification, outer draining 25, unstripped gas 26, adsorption tower 27, circulating pump 28, buffering
Tank 29, surge tank 30, washer 31.
Specific implementation mode
In the following, the present invention is specifically described by embodiment.It is necessarily pointed out that following embodiment is only used
In the invention will be further described, it should not be understood as limiting the scope of the invention, professional and technical personnel in the field
Some nonessential modifications and adaptations that content according to the present invention is made, still fall within protection scope of the present invention.
Embodiment 1
Present inventor has found that the stable operation of vacuum pump is to influence PSA dresses afterwards after extensive and in-depth study
The key factor for setting cycle of oparation can be solved effectively before vacuum pump to carrying out de- solid processing from the stripping gas of adsorption tower out
Certainly the problem of vacuum pump fluctuation of service, therefore actual verification is carried out to this solution.
The existing PSA devices of certain factory carry out hydrogen purification, if Fig. 1 is the original PSA process flow charts in embodiment 1；By
In adsorption tower come out stripping gas in Entrained adsorbent solid particle, lead to vacuum pump shutdown, after before vacuum pump increase by two
Parallel precise filter, before and after planning in device operational process according to filter pressure difference variation switch over operation, and to cutting
The filter changed is cleared up, and pressure difference quickly reaches the switching value of design before and after discovery filter after actual motion, due to
The frequency that need to switch is excessively high, and the filter under switching cannot be cleared up in time, and equipment must stop transport.Fig. 2 is to be carried secretly in stripping gas
Solid particulate matter particle diameter distribution measured result figure.
Fig. 3 is the modified technique flow chart that PSA device cycle of oparation is promoted in embodiment 1, the suction in PSA techniques
Venturi scrubber and separator shown in attached drawing 4 are added between attached tower and vacuum pump, the absorbent powder in stripping gas is carried out
Depth is washed and is carried out dehydrating to washing rear stripping gas, and desorption gas flow is 1098Nm3/h, washing flow quantity is 2m3/h,
The process is broadly divided into three steps：Depth is carried out to the absorbent powder in stripping gas using efficient Venturi scrubber first
Washing, wherein venturi inlet gas velocity is designed as 16m/s, throat's gas velocity is designed as 109m/s, exit gas speed
It is designed as 19m/s, it is 14.6kPa that pressure drop is surveyed in washer part, and the adsorbent solids particle of small particle is transferred in cleaning solution；
Thereafter gas-liquid separation is carried out in the separator, and it is 0.024MPa that pressure drop is surveyed in this part, after carrying out gas-liquid separation, in washing process
In the absorbent powder that is transferred in cleaning solution be also removed therewith；Finally enter with the stripping gas after gas-liquid separation by washing
Vacuum pump is monitored the solid content of cleaning solution, and outer row and supplement are carried out after reaching setting.If Fig. 5 is in embodiment
Venturi scrubber and separator process flow chart；If Fig. 6 is single-stage Venturi scrubber and cyclone separator arrangement schematic diagram.
For present design within the scope of normal fluctuation of operating conditions, washer and separator are stable, by washer and
For solid particle removal rate in stripping gas after separator 99% or more, vacuum pump is stable, and the PSA device cycles of operation obtain
To greatly promoting.
Claims (13)
1. a kind of method suitable for promoting PSA device cycle of oparation, which is characterized in that include the following steps：
(1) depth washing is carried out to the absorbent powder in stripping gas using efficient Venturi scrubber first, by small particle
Absorbent powder is transferred in cleaning solution；The mass percent of solid content is not more than 0.8% in the part stripping gas, cleaning solution
Dosage is 0.0012~0.003 with stripping gas volume ratio, and the volume ratio is standard state lower volume ratio；
(2) it carries out gas-liquid separation in the separator thereafter, after carrying out gas-liquid separation, is transferred in cleaning solution in washing process
Absorbent powder is also removed therewith；Stripping gas after washing carries out gas-liquid separation by separator, which is 0.05
~0.15MPa；
(3) finally enter vacuum pump with the stripping gas after gas-liquid separation by washing, it is outer after arranging or recycle outside cleaning solution to arrange.
2. the method for promoting PSA device cycle of oparation as described in claim 1, which is characterized in that venturi in step 1
Washer is using level-one or multistage washing form, and total cleaning solution dosage and desorption gas volume ratio are constant, and the partial gas phase is total
Pressure drop is less than 25kPa.
3. the method for promoting PSA device cycle of oparation as claimed in claim 2, which is characterized in that Venturi scrubber
Entrance velocity is 15~22m/s, and throat's gas velocity is 60~120m/s, and exit gas speed is 15~22m/s.
4. the method for promoting PSA device cycle of oparation as described in claim 1, which is characterized in that using rotation in step 2
Wind separator carries out gas-liquid separation, and separator inlet flow velocity is not more than 30m/s, and separator outlet flow velocity is not more than 20m/s.
5. the method for promoting PSA device cycle of oparation as described in claim 1, which is characterized in that used washing
Liquid supplements water solid content and is less than 0.05%.
6. the method for promoting PSA device cycle of oparation as described in claim 1, which is characterized in that in the stripping gas
Solid powder grain size is not less than 0.5 μm.
7. the method for promoting PSA device cycle of oparation as described in claim 1, which is characterized in that in the step 3,
Outer row is carried out when solid content is more than 4% in cleaning solution, the percentage is solid masses and liquid quality ratio.
8. a kind of device being suitable for being promoted PSA device cycle of oparation, including washer and gas-liquid separator, feature exist
In：The washer includes multistage Venturi scrubber, and every grade of Venturi scrubber is by gas access, converging transition, trunnion
Section, divergent segment, gas vent and cleaning solution entrance, nozzle composition, the gas-liquid separator by multi-stage gas-liquid separation module and
Shell separator forms.
9. device as claimed in claim 8, which is characterized in that the multistage Venturi scrubber uses cascaded structure form,
The first order Venturi scrubber outlet of the cascaded structure form is connected with second level Venturi scrubber gas access, finally
The outlet of level-one Venturi scrubber is connected with separator inlet, and the parallel form is multistage Venturi scrubber outlet convergence
It is connected again with separator inlet after to same pipeline.
10. device as claimed in claim 8, which is characterized in that the taper angle of the Venturi scrubber converging transition is 24
~29 °, the diffusion angle of diffuser be 5~8 °, 0.5~2.2 times that throat length is throat diameter.
11. device as claimed in claim 8, which is characterized in that the nozzle spray angle is 55~150 °, nozzle front end
It is 0.1~1.5 times of throat diameter at a distance from throat entrance.
12. device as claimed in claim 8, which is characterized in that the inertial separation distributor module is mounted on gas-liquid separation
Device inlet is uniformly distributed and is detached the larger drop carried secretly in gas to gas.
13. device as claimed in claim 8, which is characterized in that the gas-liquid depth separation module composition is by high-efficiency blade gas
Liquid separation module and nanofiber shuffling high-efficiency gas reservoir module composition carry out depth point to the droplet carried secretly in gas
From.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810522863.3A CN108619858A (en) | 2018-05-28 | 2018-05-28 | A kind of method and apparatus suitable for promoting PSA device cycle of oparation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810522863.3A CN108619858A (en) | 2018-05-28 | 2018-05-28 | A kind of method and apparatus suitable for promoting PSA device cycle of oparation |
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| CN201810522863.3A Pending CN108619858A (en) | 2018-05-28 | 2018-05-28 | A kind of method and apparatus suitable for promoting PSA device cycle of oparation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2664758Y (en) * | 2003-07-09 | 2004-12-22 | 马力 | Highly effective dedusting aeration air purification system |
| CN203916447U (en) * | 2014-06-18 | 2014-11-05 | 四川永祥多晶硅有限公司 | A kind of chlorosilane tail gas wet method wash mill |
| CN205454580U (en) * | 2016-01-29 | 2016-08-17 | 中乔大三农智慧农业（北京）有限公司 | High -efficient venturi |
| CN206325307U (en) * | 2016-11-25 | 2017-07-14 | 张青峰 | A kind of high efficient gas and liquid separator |
-
2018
- 2018-05-28 CN CN201810522863.3A patent/CN108619858A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2664758Y (en) * | 2003-07-09 | 2004-12-22 | 马力 | Highly effective dedusting aeration air purification system |
| CN203916447U (en) * | 2014-06-18 | 2014-11-05 | 四川永祥多晶硅有限公司 | A kind of chlorosilane tail gas wet method wash mill |
| CN205454580U (en) * | 2016-01-29 | 2016-08-17 | 中乔大三农智慧农业（北京）有限公司 | High -efficient venturi |
| CN206325307U (en) * | 2016-11-25 | 2017-07-14 | 张青峰 | A kind of high efficient gas and liquid separator |
Non-Patent Citations (1)
| Title |
|---|
| 张晓明等: ""基于Fluent的文丘里管结构参数对吸肥性能的影响"", 《江苏农业科学》 * |
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Application publication date: 20181009 |