CN206108899U - Low dew point pressure swing adsorption nitrogen device - Google Patents
Low dew point pressure swing adsorption nitrogen device Download PDFInfo
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- CN206108899U CN206108899U CN201621126013.4U CN201621126013U CN206108899U CN 206108899 U CN206108899 U CN 206108899U CN 201621126013 U CN201621126013 U CN 201621126013U CN 206108899 U CN206108899 U CN 206108899U
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Abstract
The utility model provides a low dew point pressure swing adsorption nitrogen device, this low dew point pressure swing adsorption nitrogen device includes: a compressor. Divide the fluid reservoir, two adsorption towers are provided with voltage -sharing pipeline and blow line between the export, be connected with vent line between the entry, fill out the sorption drying bed that is equipped with system nitrogen carbon molecular sieve bed and ability adsorbed water vapour in the adsorption tower from top to bottom, dust removal buffer, entry end are connected with the gas transmission line, and the export correspondence of two adsorption towers is given vent to anger the pipeline through first give vent to anger pipeline and second and is connected with the gas transmission line, wherein, the last unloading muffler that is connected with of vent line, unloading muffler lie in between first regeneration gas atmospheric valve and the second regeneration gas atmospheric valve, and the entry correspondence of two adsorption towers is admitted air the pipeline through first admit air pipeline and second and is linked together with dividing the fluid reservoir. The utility model discloses simplify whole process flow, save and reduced equipment, valve, be used as the stripping gas regeneration gas of dry usefulness simultaneously ingeniously, improved compressed air's utilization efficiency.
Description
Technical field
This utility model belongs to petrochemical industry, chemical industry, oil gas field etc. and uses nitrogen field, in particular to a kind of low dew point
Swing adsorption nitrogen producing apparatus.
Background technology
In existing operation, it is that work is separated by PSA (Pressure Swing Adsorption, pressure swing adsorption method)
Skill, isolates nitrogen from compressed air using carbon molecular sieve, however, as the water absorbing capacity of carbon molecular sieve is poor, causing institute
Obtain nitrogen water content larger, generally higher than -10 DEG C of its pressure leak source, and under most working condition, need the pressure leak source of nitrogen
It is low, such as it is -70 DEG C in LNG project demands pressure leak source.For this purpose, the low dew point nitrogen for requiring is met to produce, it is present
PSA nitrogen producing procedures be before nitrogen-making device plus exsiccator, to be first dried to nitrogen raw material processed, specifically can be found in as shown in figure 3,
In the figure, it is in point setting exsiccator 3 ' (such as cooling driers or dryer) between flow container 2 ' and adsorption tower 4 ', when compressor 1 '
When compressed air Jing of offer point flow container 2 ' is exported, by the absorption of two drying towers 3 ', pressure, desorbing and purge, with
Water in alternation adsorption compression air, makes compressed air have higher aridity, is that subsequent production goes out to meet the requirements
Low dew point nitrogen create conditions, afterwards, absorption that two adsorption towers 4 ' pass through, pressure, desorbing and purge, using compression
By both internal carbon molecular sieve oxygen and carbon dioxide etc., alternating exports low dew point nitrogen to air, to meet needs.
However, in the process, it is dried as compressed air needs to first pass through exsiccator, then oxygen is adsorbed by adsorption tower
, there are two technological processes of regenerative dryer and PSA nitrogen in the impurity medium such as gas and carbon dioxide, equipment is more, long flow path,
And PSA nitrogen can not be shared with exsiccator in the regeneration gas of desorption process, can additionally be consumed certain unstripped gas, be unfavorable for
Energy saving, production cost are high.
In view of this, the design people is developed a kind of low according to the production design experiences for being engaged in this area and association area
Dew point swing adsorption nitrogen producing apparatus, to solving the problems, such as prior art.
Utility model content
It is to provide a kind of low dew point swing adsorption nitrogen producing apparatus that the purpose of this utility model is, simplifies and produces low dew point
Nitrogen process flow process, makes to be dried and two kinds of processes of nitrogen processed is realized in a technique, while the stripping gas using carbon molecular sieve is made
For the regeneration gas of desiccant, the utilization ratio of compressed air is improve.
For this purpose, the utility model proposes a kind of low dew point swing adsorption nitrogen producing apparatus, including a compressor and one pass through
Point flow container that pipeline is connected with the compressor, which also includes：
In two adsorption towers that left and right is set up in parallel, between its outlet, a balance pipe line and a blow line are provided with, its
An exhaust line is connected between entrance, an equalizing valve is installed on the balance pipe line, on the blow line, one is provided with
Purging gas control valve, is arranged at intervals with the first regeneration gas atmospheric valve and the second regeneration gas atmospheric valve on the exhaust line, described
From top to bottom fill out in adsorption tower and be provided with a nitrogen-preparing carbon molecular sieves bed and one can adsorb the adsorption dry bed of vapor；
Dedusting buffer, its arrival end are connected with gas transmission line, and the outlet correspondence of adsorption tower described in two is by the first outlet
Pipeline and the second outlet line are connected with the gas transmission line；
Wherein, a vent muffler is connected with the exhaust line, the vent muffler is positioned at the described first regeneration
Between gas atmospheric valve and the second regeneration gas atmospheric valve, the entrance correspondence of adsorption tower described in two is entered by the first admission line and second
Gas pipeline is connected with described point of flow container, and first admission line, the second admission line, the first outlet line and second go out
The gas pipeline respectively pipeline with on-off function.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, the nitrogen-preparing carbon molecular sieves bed includes a sieve
Hole demarcation strip, the sieve aperture separate plate level and are fixed in the adsorption tower, and the inner chamber of the adsorption tower is divided on one
Sheaf space and a lower layer space, the upper sheaf space is built-in to be filled with carbon molecular sieve, is provided with and can adsorb water in the lower layer space
The adsorption dry bed of steam.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, the sieve aperture demarcation strip is provided with one first lower point
Separate layer on interlayer and first, first time separate layer are multiple first time porcelain being laid on the sieve aperture demarcation strip
Ball, on described first separate layer be it is multiple be laid on first time separate layer first on porcelain ball, porcelain ball on described first
External diameter of the external diameter less than first time porcelain ball, wherein, the carbon molecular sieve is positioned at the upside of separate layer on described first.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, the adsorption dry bed includes an adsorbent
Supporting screening plate, the adsorbent supporting screening plate are connected with the medial wall of the adsorption tower, filling energy in the lower layer space
The adsorption desiccant of absorption vapor, the adsorption desiccant are located at the upside of the adsorbent supporting screening plate.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, the adsorbent supporting screening plate is provided with one second
Separate layer on lower separate layer and second, second time separate layer be it is multiple be laid under the sieve aperture demarcation strip second
Lower porcelain ball, on described second separate layer be it is multiple be laid on second time separate layer second on porcelain ball, porcelain on described second
The external diameter of ball less than second time porcelain ball external diameter, wherein, the adsorption desiccant be located at described second on separate layer it is upper
Side.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, the adsorption desiccant is 13X molecular sieve desiccants
Or activated alumina desiccant, or, the adsorption desiccant is the 13X being from top to bottom sequentially filled in the lower layer space
Molecular sieve desiccant and activated alumina desiccant.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, difference is installed on the lateral wall of the adsorption tower
Be tilted down a carbon molecular sieve discharge duct of setting, one be dried adsorbent charging pipe and one be dried adsorbent discharge duct, institute
State the upper port of carbon molecular sieve discharge duct adjacent to the sieve aperture demarcation strip on the upside of, and be connected with the upper sheaf space, it is described
Be dried the lower port of adsorbent charging pipe adjacent to the sieve aperture demarcation strip on the downside of, and be connected with the lower layer space, it is described
The upside of the upper port adjacent to the adsorbent supporting screening plate of adsorbent discharge duct is dried, and it is empty with the lower floor of the adsorption tower
Between be connected.
Low dew point swing adsorption nitrogen producing apparatus as above, wherein, first is provided with first admission line enter
Air valve, is provided with the second intake valve on second admission line, first outlet line is provided with the first air outlet valve, described
Second air outlet valve is installed on the second outlet line, first admission line and the second admission line further pass through an outlet
Line is connected with described point of flow container.
Low dew point swing adsorption nitrogen producing apparatus that this utility model is provided and, include compressor, point flow container, adsorption tower with
And dedusting buffer etc., using in the attached nitrogen bed processed of the built-in setting of adsorption tower and adsorption dry bed, by adsorption dry bed
Layer and nitrogen-preparing carbon molecular sieves bed are worked successively, realize compressed air detached work(after being first dried in same adsorption tower
Energy.
Compared with prior art, this utility model simplifies the nitrogen producing procedure of compressed air, makes to be dried and two kinds of mistakes of nitrogen processed
Journey realization simultaneously in an absorbing process, had both ensured that the dew point of nitrogen met related request, moreover it is possible to share desorbing during nitrogen processed
The gas of regeneration, i.e., the dry oxygen rich gas for being desorbed using nitrogen processed, passes downwardly through when being dried adsorbent of adsorption dry bed
It is dried, twice laid can be realized, improve compressed air utilization ratio, process unstripped gas more than 15% can be saved, improved and produced
Product earning rate；Due to being no longer separately provided exsiccator, equipment, pipeline and valve quantity are reduced, technological process had both been shortened, and had been subtracted
Compressed air is lacked and has flowed through pipeline process, so as to reduce pressure drop time, saved certain compression and waste, moreover it is possible to reduce and save equipment
Investment, is conducive to equipment to arrange, the arrangement and pipeline for saving exsiccator is taken up an area.
Description of the drawings
The following drawings is only intended in schematic illustration and explanation is done to this utility model, does not limit model of the present utility model
Enclose.Wherein：
Fig. 1 is the composition structural representation of low dew point swing adsorption nitrogen producing apparatus of the present utility model.
Fig. 2 is the structural representation of adsorption tower in low dew point swing adsorption nitrogen producing apparatus of the present utility model.
Fig. 3 is the structural representation of adsorption tower in existing low dew point swing adsorption nitrogen producing apparatus.
Main element label declaration：
12 points of compressor flow container
21 pipeline, 22 outlet line
3rd, 3 " sheaf space on adsorption tower 301
302 lower layer space, 31 sieve aperture demarcation strip
32 carbon molecular sieve, 33 first time separate layer
Separate layer on 331 first time porcelain ball 34 first
35 adsorbent supporting screening plate of porcelain ball on 341 first
36 adsorption desiccant, 37 second time separate layer
Separate layer on 371 second time porcelain ball 38 second
391 carbon molecular sieve discharge duct of porcelain ball on 381 second
392 are dried adsorbent charging pipe
4 dedusting buffer, 41 gas transmission line
51 first outlet line, 52 second outlet line
53 first air outlet valve, 54 second air outlet valve
6 balance pipe line, 61 equalizing valve
7 blow line 71 purges gas control valve
8 exhaust line, 81 first regeneration gas atmospheric valve
82 second regeneration gas atmospheric valve, 83 vent muffler
91 first admission line, 92 second admission line
93 first intake valve, 94 second intake valve
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, below in conjunction with accompanying drawing and
Preferred embodiment, to the utility model proposes the specific embodiment of low dew point swing adsorption nitrogen producing apparatus, structure, feature and
Effect, describes in detail as after.In addition, the explanation by specific embodiment, when can be to this utility model to reach predetermined purpose
The technological means and effect taken are able to more deeply specific understanding, but institute's accompanying drawing is only to provide with reference to and illustrates to use,
Not for being any limitation as to this utility model.
Fig. 1 is the composition structural representation of low dew point swing adsorption nitrogen producing apparatus of the present utility model, and in figure, arrow is gas
Stream direction.Fig. 2 is the structural representation of adsorption tower in low dew point swing adsorption nitrogen producing apparatus of the present utility model.
As shown in figure 1, the utility model proposes low dew point swing adsorption nitrogen producing apparatus, which includes compressor 1, point liquid
Tank 2, two adsorption towers 3,3 " (for ease of understanding, this sentences different labels sign) and dedusting buffer 4, wherein：
Described point of flow container 2 is connected with the outlet of the compressor 1 by pipeline 21, when the compressor 1 works, just
In compressed air is delivered to point flow container 2, make that the liquid (such as water) in compressed air is as much as possible to be separated；
As described in Figure 1, adsorption tower 3,3 described in two " are set up in parallel in left and right, are provided with a balance pipe between both outlets
Line 6 and a blow line 7, are connected with an exhaust line 8 between both entrances, are provided with one equal on the balance pipe line 6
Pressure valve 61, is provided with a purging gas control valve 71 on the blow line 7, be arranged at intervals with first again on the exhaust line 8
Angry atmospheric valve 81 and the second regeneration gas atmospheric valve 82,93 second intake valve 94 of the first intake valve, the adsorption tower 3 (in 3 ") by
Up to fill out down be provided with one for the foreign gases such as adsorption of oxygen and carbon dioxide nitrogen-preparing carbon molecular sieves bed 31 (such as carbon molecule
Sieve), an and adsorption dry bed 32 that can adsorb water (such as adsorption desiccant)；
The arrival end of the dedusting buffer 4 is connected with gas transmission line 41, adsorption tower 3,3 described in two " outlet correspondence it is logical
Cross the first outlet line 51 and the second outlet line 52 is connected with the gas transmission line 41；
Wherein, a vent muffler 83 is connected with the exhaust line 8, the vent muffler 83 is located at described first
The entrance correspondence of between regeneration gas atmospheric valve 81 and the second regeneration gas atmospheric valve 82, adsorption tower 3,3 described in two " is by the first air inlet
Pipeline 91 and the second admission line 92 are connected with described point of flow container 2, first admission line 91, the second admission line 92,
The pipeline of first outlet line 51 and the second outlet line 52 respectively with on-off function (i.e. connection and turn-off function) the
One intake valve, 93 second intake valve 94.
The utility model proposes low dew point swing adsorption nitrogen producing apparatus, in practicing, when in described point of flow container 2
After compressed air is delivered to the lower end of the adsorption tower, by the adsorption dry bed 32 in the adsorption tower, can first be about to pressure
Absorption in contracting air, afterwards, is able to dry compressed air again by nitrogen-preparing carbon molecular sieves bed 31, can be by oxygen therein
The medium such as gas and carbon dioxide adsorbs, so as to isolate satisfactory low dew point nitrogen.Thus, this utility model is in same suction
Attached tower interior energy realizes that being first dried for compressed air separates afterwards, shortens technological process, reduces the pipeline flowed through by compressed air,
So as to reduce process time.
Fig. 2 is referred to, the nitrogen-preparing carbon molecular sieves bed includes a sieve aperture demarcation strip 31, and the sieve aperture separates plate level
It is fixed in the adsorption tower, and the inner chamber of the adsorption tower is divided into into sheaf space 301 and a lower layer space 302 on one,
The carbon molecular sieve 32 for adsorption of oxygen and carbon dioxide is filled with the upper sheaf space 301, is set in the lower layer space 302
There is the adsorption dry bed that can adsorb vapor.Wherein, by arranging the sieve aperture demarcation strip 31, can be by carbon molecular sieve
32 are separated with the adsorption dry bed, as the consumption of the carbon molecular sieve 32, can be according to the volume of adsorption tower, real work
Requirement etc. is loaded, and here is not limited.
Wherein, the sieve aperture demarcation strip 31 is provided with separate layer 34 on first time separate layer 33 and first, and described
Once separate layer 33 be multiple first time porcelain ball 331 being laid on the sieve aperture demarcation strip 31, separate layer 34 on described first
For it is multiple be laid on first time separate layer 33 first on porcelain ball 341, on described first, the external diameter of porcelain ball 341 is less than described
The external diameter of first time porcelain ball 331, wherein, the carbon molecular sieve 33 is positioned at the upside of separate layer 34 on described first.Specifically should
Used time, first multiple first time porcelain ball 331 can be laid on first separate layer 33, then by porcelain ball 341 on multiple first
It is layed on first time separate layer 33 that first time porcelain ball 331 is formed, finally, then carbon molecular sieve 33 is filled in into this on first and divides
On the upside of interlayer 34.
By arrange first time separate layer 33 and first on separate layer 34, can support carbon molecular sieve 33, preferably avoid
It is unrestrained from sieve aperture demarcation strip 31, moreover it is possible to make compressed air from the gap of porcelain ball 341 on each first time porcelain ball 331, each described first
Uniformly flow up, fully contact with carbon molecular sieve 33, it is ensured that the purity of nitrogen.
It is preferred that the adsorption dry bed includes an adsorbent supporting screening plate 35, the adsorbent supporting screening plate 35
It is connected with the medial wall of the adsorption tower, filling in the lower layer space 302 can adsorb the adsorption desiccant 36 of vapor,
The adsorption desiccant 36 is located at the upside of the adsorbent supporting screening plate 35.In actual use, by adjusting the carbon molecule
The sieve 33, loadings of the adsorption desiccant 36, can produce the nitrogen of different product purity and pressure leak source, meet various
The use requirement of change.
Further, the adsorbent supporting screening plate 35 is provided with separate layer on second time separate layer 37 and second
38, second time separate layer 37 is multiple second time porcelain ball 371 being laid under the sieve aperture demarcation strip 35, on described second
Separate layer 38 for it is multiple be laid on second time separate layer 37 second on porcelain ball 381, the external diameter of porcelain ball 384 on described second
Less than the external diameter of second time porcelain ball 371, wherein, the adsorption desiccant 36 on described second separate layer 38 it is upper
Side.
Preferably, the adsorption desiccant 36 is 13X molecular sieve desiccants or activated alumina desiccant, can be according to tool
Body situation is selected, wherein, activated alumina is the certain selection for obtaining -40 DEG C or so compressed airs of pressure leak source, but 13X point
Absorbability of the son sieve under low moisture environment is higher, it is adaptable to pole drying compressed air (pressure leak source is less than -60 DEG C), but its
Mechanical strength and water droplet performance are unsatisfactory.Therefore, in the embodiment shown in figure 2, the adsorption desiccant 36 is served as reasons
13X molecular sieve desiccants 361 and activated alumina desiccant 362 in the lower layer space are sequentially filled down up to, to
Acquisition optimum efficiency, more fully drying compressed air, so as to reduce above-mentioned each valve motion number of times.
As shown in Fig. 2 for ease of changing the carbon molecular sieve 33, the adsorption desiccant 36, in the outer of the adsorption tower
Be provided with the wall of side the setting that is tilted down respectively a carbon molecular sieve discharge duct 391, be dried adsorbent charging pipe 392 and
One is dried adsorbent discharge duct 393, and the upper port of the carbon molecular sieve discharge duct 391 is adjacent on the sieve aperture demarcation strip 31
Side, and be connected with the upper sheaf space 301, the lower port for being dried adsorbent charging pipe 392 is adjacent to the sieve aperture point
The downside of dividing plate 31, and be connected with the lower layer space 302, the upper port for being dried adsorbent discharge duct 3 is adjacent to institute
The upside of adsorbent supporting screening plate 35 is stated, and is connected with the lower layer space 302.
In addition, the first intake valve 93 is provided with first admission line 91, install on second admission line 901
There is the second intake valve 94, first outlet line 51 is provided with the first air outlet valve 53, install on second outlet line 52
Second air outlet valve 54, so that by the connection and shut-off of each pipeline of each valve correspondence control, in real work, aforementioned each valve is excellent
Elect Electromagnetic Control valve as, Automatic Control can be realized.In addition, first admission line 91 and the second admission line 92 enter one
Step is connected with described point of flow container 2 by an outlet line 22.
The technological process of low dew point swing adsorption nitrogen producing apparatus of the present utility model, passes through pipeline 21 to divide by compressor 1
Flow container 22 provides compressed air, and the technological process is comprised the following steps：
1) the first admission line 91 and the first outlet line 51 is made to be respectively at connected state, wherein 3 (Fig. 1 of an adsorption tower
In for left side adsorption tower) compressed air is dried and is adsorbed, and the nitrogen made is exported to dedusting buffer；
At the same time, the second regeneration gas atmospheric valve 82 and purging gas control valve 71,3 " (Fig. 1 of another adsorption tower are opened successively
In for right side adsorption tower) carry out desorbing and purging, in desorption process, the gas that its nitrogen-preparing carbon molecular sieves bed is desorbed to
Under by, when being dried adsorption bed and vent muffler 83 and discharging, being dried to being dried adsorption bed.
Specifically, in the process, on the one hand, the compressed air Jing outlet line 22 and the first air inlet in point flow container 2
Pipeline 91 is delivered to wherein described in one in adsorption tower 3, from the bottom to top through the adsorption dry bed and nitrogen processed of a wherein adsorption tower 3
Carbon molecular sieve bed, is dried, adsorbs and filter out nitrogen to compressed air, and the first outlet lines of Jing 51 are by nitrogen Jing gas transmissions
Pipeline 41 is delivered to dedusting buffer 4, on the other hand, another adsorption tower 3 " inside by the second regeneration gas atmospheric valve 82, put
Empty deafener 83 mutually passes to blood pressure lowering with ambient atmosphere, with the reduction of its internal pressure, its internal nitrogen-preparing carbon molecular sieves bed
Previously the oxygen of absorption, the carbon dioxide even gas desorption such as nitrogen is regenerated to carry out desorbing, i.e. the nitrogen-preparing carbon molecular sieves bed
Come, be released in air via vent muffler 83, so that another adsorption tower 3 " internal pressure be atmospheric pressure state.
In the operation, with another adsorption tower 3, " reduction of internal pressure, its internal nitrogen-preparing carbon molecular sieves bed are released
Put adsorbed to gases such as oxygen and carbon dioxide, to realize regeneration, beneficial to the recycling of nitrogen-preparing carbon molecular sieves bed, and
And, in the operation, the regeneration stripping gas (dry oxygen rich gas) desorbed by the use of nitrogen processed as the regeneration gas of desiccant, to
When passing through adsorption dry bed down, which can be dried, realize twice laid, be improve compressed air utilization ratio, reach
To the purpose of shared regeneration gas；
In addition, in purging, wherein the part nitrogen Jing blow lines 7 in an adsorption tower 3 enter another adsorption tower 3 " in,
And when vent muffler 83 is discharged to air, can be to another adsorption tower 3 " adsorption bed further purge and be dried；
2) the second regeneration gas atmospheric valve 82 and purging gas control valve 71 are turned off, equalizing valve 61 is opened, wherein an adsorption tower 3 enters
Row is pressed, and another adsorption tower 3 " carries out punching press, the part nitrogen in a wherein adsorption tower 3 is diverted into by balance pipe line 6
Enter another adsorption tower 3 ", make the pressure in two adsorption towers tend to balanced, afterwards, shut-off equalizing valve 61, the first admission line 91 and
First outlet line 51.
3) the second admission line 92 and the second outlet line 52 is made to be respectively at connected state, another adsorption tower 3 " to compression
It is air-dried and is adsorbed, and the nitrogen made is exported to dedusting buffer；
At the same time, the first regeneration gas atmospheric valve 81 and purging gas control valve 71 are opened successively, wherein an adsorption tower 3 is carried out
Desorbing and purging, in desorption process, the gas that its nitrogen-preparing carbon molecular sieves bed is desorbed pass downwardly through be dried adsorption bed and
When vent muffler discharges, it is dried to being dried adsorption bed.
Effect and the step 1 of the step) it is similar, that is, it is by another adsorption tower 3 to differ only in " nitrogen processed is carried out, and
The adsorption dry bed of a wherein adsorption tower 3 is dried, be will not be described here.
4) the first regeneration gas atmospheric valve 81 and purging gas control valve 71 are turned off, equalizing valve 61 is opened, another adsorption tower 3 " enters
Row is pressed, wherein an adsorption tower 3 carries out punching press, makes the pressure in two adsorption towers tend to balanced, afterwards, shut-off equalizing valve 61, the
Two admission lines 92 and the second outlet line 52.
Low dew point swing adsorption nitrogen producing apparatus of the present utility model, change the tube pass of existing exsiccator, operated
The parameters such as process control time, reduce equipment, pipeline and valve quantity, make to be dried and two kinds of processes of nitrogen processed are in an absorbing process
In simultaneously realize, shorten technological process and working time.
Due to each step of the present utility model equally be absorption, pressure, regeneration, purging etc. process, therefore, actually used
In, operating parameter (such as time, operation cycle) of operating process of the present utility model and correlation etc. refers to existing PSA nitrogen
Technique, can reduce burden during field operation, after being particularly suited for the transformation to existing equipment, by existing PSA nitrogen producing crafts mistake
Journey directly transplanting into this utility model, quickly to realize productivity effect.
It is preferred that this device is by the dry run of former low dew point nitrogen gas generating system different with nitrogen process processed operating process and behaviour
A kind of operating process and operation cycle are unified into as the cycle；Dry run has been useed as furthermore with the stripping gas of nitrogen process processed
Regeneration gas.
Wherein, for two adsorption tower of the present utility model, it is preferred to use the time as shown in following table one carries out Row control：
Table one：Two adsorption towers operationally between on corresponding relation
Wherein, for the adsorption desiccant referred in this utility model, its consumption can be also calculated according to equation below：
M=100*V*1.293* (m0- m ') * 150%/M, wherein：M-required desiccant quality, kg；m0- saturation compressed air is aqueous
Amount；M '-drying compressed air water content；M-desiccant adsorption capacity, 500g water/100kg desiccant；When V-single column is adsorbed
Between compressed air treating capacity, 300Nm3；150%-safe filling coefficient.
Such as：With 40 DEG C of compressed airs, as a example by -40 DEG C are dried target, compressed air treating capacity is set as 3600Nm3/ h,
Single column adsorption cycle is set as 1mUn, and operating pressure is 0.8MPa, and V choosings value is 60Nm3, m0Choosing value is 5.79g/kg, and m ' choosing values are
0.01g/kg, M choosing value is 500g water/100kg, is calculated according to above-mentioned formula and is understood, the single column adsorbent inventory about 135kg.
Certainly, for the amount of fill of adsorption desiccant, can calculate also referring to the formula, needs be used to meet.
Compared with prior art, the utility model proposes low dew point swing adsorption nitrogen producing apparatus, using in desorption process
The dry oxygen rich air that carbon molecular sieve desorption and regeneration goes out, when adsorption dry bed is passed downwardly through, can be dried adsorption desiccant, real
Show twice laid, improve compressed air utilization ratio, reach the purpose of shared regeneration gas, such as, it is assumed that nitrogen gas purity
99.9% nitrogen making machine sky nitrogen ratio is 3.3:1；Then 3600Nm3/ h compressed airs can be with output 1090Nm3/ h passing nitrogens, it is remaining
About 2510Nm3The gas such as/h oxygen and carbon dioxide then by carbon molecular sieve adsorb, after desorption and regeneration, the desorption gas to
Down after 13X molecular sieve desiccants and activated alumina desiccant, it is vented from vent muffler, is realized to adsorption dry in the lump
The water adsorbed by agent carries out desorbing with drying.Thus, in this utility model, its desorbing nitrogen amount is about dry air
14%, and up to 69.7% desorption gas can complete the drying to adsorption dry bed, realize the recycling of waste gas.
The low dew point swing adsorption nitrogen producing apparatus that this utility model is provided, using in the built-in nitrogen carbon point of filling and presenting of same adsorption tower
The adsorption desiccant of adsorption dry bed is seated in the carbon of nitrogen-preparing carbon molecular sieves bed by sub- sifting bed layer and adsorption dry bed
Before molecular sieve, realize compressed air being first dried in same adsorption tower and separate afterwards, both shortened technological process, reduced
Compressed air flows through pipeline process, so as to reduce pressure drop time, saves certain compression and wastes, moreover it is possible to reduces and save equipment and throw
Money, is conducive to equipment to arrange, the arrangement and pipeline for saving exsiccator is taken up an area, it is most important that, compared with prior art, this practicality
New desorption gas replace regeneration gas of the fresh feed compressed air as desiccant, it is achieved thereby that the desorbing of PSA nitrogen
The twice laid of gas and improve the utilization rate of unstripped gas.
The schematic specific embodiment of this utility model is the foregoing is only, model of the present utility model is not limited to
Enclose.Any those skilled in the art, the equivalent variations made on the premise of without departing from design of the present utility model and principle
With modification, the scope of this utility model protection all should be belonged to.
Claims (8)
1. a kind of low dew point swing adsorption nitrogen producing apparatus, an including compressor and one it is connected with the compressor by pipeline
Point flow container, it is characterised in that the low dew point swing adsorption nitrogen producing apparatus are also included：
In two adsorption towers that left and right is set up in parallel, between its outlet, a balance pipe line and a blow line, its entrance are provided with
Between be connected with an exhaust line, an equalizing valve is installed on the balance pipe line, a purging on the blow line, is provided with
Gas control valve, is arranged at intervals with the first regeneration gas atmospheric valve and the second regeneration gas atmospheric valve, the absorption on the exhaust line
From top to bottom fill out in tower and be provided with a nitrogen-preparing carbon molecular sieves bed and one can adsorb the adsorption dry bed of vapor；
Dedusting buffer, its arrival end are connected with gas transmission line, and the outlet correspondence of adsorption tower described in two is by the first outlet line
And second outlet line be connected with the gas transmission line；
Wherein, a vent muffler is connected with the exhaust line, the vent muffler is put positioned at first regeneration gas
Between empty valve and the second regeneration gas atmospheric valve, the entrance correspondence of adsorption tower described in two is by the first admission line and the second air inlet pipe
Line is connected with described point of flow container, first admission line, the second admission line, the first outlet line and the second escape pipe
The line respectively pipeline with on-off function.
2. low dew point swing adsorption nitrogen producing apparatus as claimed in claim 1, it is characterised in that the nitrogen-preparing carbon molecular sieves bed
Include a sieve aperture demarcation strip, the sieve aperture separates plate level and is fixed in the adsorption tower, and by the inner chamber of the adsorption tower
It is divided into sheaf space and a lower layer space on one, the upper sheaf space is built-in to be filled with carbon molecular sieve, sets in the lower layer space
There is the adsorption dry bed that can adsorb vapor.
3. low dew point swing adsorption nitrogen producing apparatus as claimed in claim 2, it is characterised in that the sieve aperture demarcation strip is provided with
Separate layer on one first time separate layer and first, first time separate layer are multiple being laid on the sieve aperture demarcation strip
First time porcelain ball, on described first separate layer be it is multiple be laid on first time separate layer first on porcelain ball, described first
External diameter of the external diameter of upper porcelain ball less than first time porcelain ball, wherein, the carbon molecular sieve is positioned at separate layer on described first
Upside.
4. as claimed in claim 2 or claim 3 low dew point swing adsorption nitrogen producing apparatus, it is characterised in that the adsorption dry bed
Include an adsorbent supporting screening plate, the adsorbent supporting screening plate is connected with the medial wall of the adsorption tower, it is described under
Filling in sheaf space can adsorb the adsorption desiccant of vapor, and the adsorption desiccant is located at the upper of the adsorbent supporting screening plate
Side.
5. low dew point swing adsorption nitrogen producing apparatus as claimed in claim 4, it is characterised in that on the adsorbent supporting screening plate
Separate layer on second time separate layer and second is provided with, second time separate layer is laid on the sieve aperture separation for multiple
Second time porcelain ball under plate, on described second separate layer be it is multiple be laid on second time separate layer second on porcelain ball, institute
The external diameter of the external diameter less than second time porcelain ball of porcelain ball on second is stated, wherein, the adsorption desiccant is on described second
The upside of separate layer.
6. low dew point swing adsorption nitrogen producing apparatus as claimed in claim 5, it is characterised in that the adsorption desiccant is 13X
Molecular sieve desiccant or activated alumina desiccant, or, the adsorption desiccant is from top to bottom to be sequentially filled under described
13X molecular sieve desiccants and activated alumina desiccant in sheaf space.
7. low dew point swing adsorption nitrogen producing apparatus as claimed in claim 6, it is characterised in that on the lateral wall of the adsorption tower
One carbon molecular sieve discharge duct of the setting that is tilted down respectively is installed, one is dried adsorbent charging pipe and one is dried adsorbent
Discharge duct, the upper port of the carbon molecular sieve discharge duct adjacent to the sieve aperture demarcation strip on the upside of, and with the upper sheaf space phase
Connection, the lower port for being dried adsorbent charging pipe adjacent to the sieve aperture demarcation strip on the downside of, and with the lower layer space phase
Connection, upside of the upper port for being dried adsorbent discharge duct adjacent to the adsorbent supporting screening plate, and with the absorption
The lower layer space of tower is connected.
8. low dew point swing adsorption nitrogen producing apparatus as described in claim 1 or 7, it is characterised in that first admission line
On be provided with the first intake valve, the second intake valve is installed on second admission line, first outlet line is provided with
First air outlet valve, installs the second air outlet valve on second outlet line, first admission line and the second admission line enter
One step is connected with described point of flow container by an outlet line.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276823A (en) * | 2016-10-14 | 2017-01-04 | 北京石油化工工程有限公司 | Low dew point swing adsorption nitrogen producing apparatus and technological process |
| CN112691497A (en) * | 2020-12-04 | 2021-04-23 | 天津大学 | Multifunctional gas regulating system and regulating method for rural public health |
-
2016
- 2016-10-14 CN CN201621126013.4U patent/CN206108899U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276823A (en) * | 2016-10-14 | 2017-01-04 | 北京石油化工工程有限公司 | Low dew point swing adsorption nitrogen producing apparatus and technological process |
| CN106276823B (en) * | 2016-10-14 | 2018-10-23 | 北京石油化工工程有限公司 | Low dew point swing adsorption nitrogen producing apparatus and technological process |
| CN112691497A (en) * | 2020-12-04 | 2021-04-23 | 天津大学 | Multifunctional gas regulating system and regulating method for rural public health |
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