CN104857810B - Gas condensation process and equipment - Google Patents
Gas condensation process and equipment Download PDFInfo
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- CN104857810B CN104857810B CN201410061194.6A CN201410061194A CN104857810B CN 104857810 B CN104857810 B CN 104857810B CN 201410061194 A CN201410061194 A CN 201410061194A CN 104857810 B CN104857810 B CN 104857810B
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Abstract
The present invention relates to green technology, disclose a kind of gas condensation process and equipment.Two condensers that gas to be condensed is passed through series winding successively are condensed, obtain liquid or the solid-state of gas to be condensed, wherein, cooled down in the condenser of frosting first gas to be condensed being passed through in two condensers, again by after the cooling of frosting condenser, gas to be condensed is passed through in the non-frosting condenser in two condensers and is condensed.Compared with prior art, the present invention can either be by the temperature of gas to be condensed by the condenser defrost of frosting, do not need to be forced because there being the frosting of a condenser to terminate condensation work again, in gas to be condensed 99% composition condensation can also be reclaimed, by reasonable heat exchange, make full use of the energy of internal system, it is little to have reached energy loss, save energy.
Description
Technical field
The present invention relates to green technology, particularly to gas condensation process and equipment.
Background technology
In recent years, with industrial expansion, in fields such as petrochemical industry, pharmacy, storages, various volatile organic matters are being given birth to
The organic steam of higher concentration, such as gasoline, aerial kerosene etc. is volatilized, no during producing, store, transport, sell and use etc.
But waste of resource, and pollute environment, and leave great fire or hidden peril of explosion, the PM2.5 particularly receiving much concern recently
(refer to the particulate matter that diameter in air is less than or equal to 2.5 microns, also referred to as lung particulate matter, full spelling is
Particulate Matter 2.5) have a strong impact on ambient air quality, less than 2.5 microns of fine particle is essentially from fossil
The volatile organic matter that fuel combustion produces, the particularly volatile organic matter of small molecule such as alkanes, alkenes, acetylenic etc., these
Elemental carbon, hydrogen, oxygen is not only contained, some also can contain the toxic element such as halogen, serious harm body in volatile Organic substance
Body health is it is necessary to be reclaimed.China promulgates《Storage tank farm atmosphere pollutants emission standardses》(GB20950-2007) it is desirable to right
The device for recovering oil and gas NMHC response rate 95%, non-methane hydrocarbon emission concentration 25g/m3, two indexs need simultaneously
Up to standard.
In prior art, generally process volatile organic matter or oil gas in the following manner：
One, absorption：Using activated carbon, Kaolin etc. adsorb volatile organic matter, then again by volatile organic matter from work
It is desorbed out in property charcoal or Kaolin, but because Organic substance is inflammable, this method has certain potential safety hazard.
Two, absorb：Using water, acid or Alkali absorption volatile organic matter, part volatile organic matter after absorption, is had to transfer to
In water, acid or alkali, also do not partially absorb, and the water after absorbing, acid or alkali could discharge after needing to be processed again, work
Sequence is loaded down with trivial details, and cost is larger.
Three, burn：Directly volatile organic matter is burned, after burning, the gas producing or granule still can cause dirt to air
Dye.
Four, condensation：Condensation is effect the best way in prior art, and the safe and reliable, response rate is high, in petroleum vapor recovery
That applies is the most extensive.
By the way of USP4027495 patent combines continuous condensation using mechanical compression refrigeration and liquid nitrogen refrigerating, first order water
The cold temperature by volatile organic matter drops to 4 DEG C about from ambient temperature, makes most of condensation vapor in volatile organic matter
Remove for water.Volatile organic matter enters shallow cold level after leaving precooler.Mechanical compression refrigeration can be by volatile organic matter temperature
Degree is cooled to -30～-73 DEG C (degree Celsius), sets as needed, the hydrocarbon of nearly half in recyclable volatile organic matter
Matter.Leaving shallow cold volatile organic matter and enter deep cooling level, -73 DEG C～110 DEG C being cooled to using liquid nitrogen, thus reaching cold
The purpose of solidifying separation and recovery.But this mode needs at least split-compressor volatile organic matter could be condensed to -30 DEG C
～-73 DEG C, system reliability is low, and cost is also higher, and because dynamic equipment (compressor) is coexisted with inflammable Organic substance, has
Potential safety hazard.
CN101348729 patent proposes for oil gas to be compressed to 0.5Mpa from 0.1Mpa (MPa), then carries out three-level condensation.The
One-level oil gas is chilled to 3 DEG C from 30 DEG C, and the condensate moisture in oil gas is got off, and oil gas enters second level ice chest again, be cooled to from 3 DEG C-
30 DEG C, the component of more than C5 is condensed out, third level oil gas is cooled to -57 DEG C from -30 DEG C, by under C3 component condensation in oil gas
Come, remaining hydrocarbonaceous is less than 25 grams every cubic metre of component and air gas mixture together enters air.This mode energy consumption is larger,
Also there is the potential safety hazard that compressor and inflammable Organic substance coexist.
In condensation process, conventional condenser species has shell-and-tube cooler and wound form condenser at present.If to be condensed
When gas is larger with the low-temperature receiver temperature difference, either shell-and-tube cooler or wound form condenser, all easily frostings of its heat exchange tube wall,
Rear heat exchanger tube of long duration can be plugged, and loses condensation function.If defrost is carried out to the condenser of frosting, need with heating,
This not only needs the extra energy it is necessary to first condenser quit work just to carry out defrosting operation, leads to process
Limited by the amount of gas to be condensed.
Content of the invention
It is an object of the invention to provide a kind of gas condensation process and equipment, simplify the handling process of oil gas condensation,
And defrost need not be carried out to the condenser of frosting by extra technique, take full advantage of the energy of internal system, reach energy
Amount loses little, the effect of save energy.
For solving above-mentioned technical problem, the invention provides a kind of gas condensation process, comprise the steps of：
Two condensers that gas to be condensed is passed through series winding successively are condensed, and obtain the liquid of described gas to be condensed
Or solid-state；
Wherein, cooled down in the condenser of frosting first described gas to be condensed being passed through in described two condensers,
Again the gas described to be condensed obtaining after the cooling of the described condenser of frosting is passed through in described two condensers not
Condensed in frosting condenser.
Present invention also offers a kind of condensing plant of gas, comprise：Two condensers and two-way pipeline；
Described two condensers pass through described two-way pipeline series winding；
Gas to be condensed is introduced into the condenser of frosting in described two condensers, through the described condenser of frosting
After cooling, described gas to be condensed enters the non-frosting condenser in described two condensers, warp again by described two-way pipeline
After crossing the condensation of described non-frosting condenser, obtain liquid or the solid-state of described gas to be condensed.
Compared with prior art, in the present invention, gas condensation process is two condensations that gas to be condensed is first passed through series winding
Cooled down in the condenser of frosting in device, then be passed through in non-frosting condenser and condensed, through this two condensers
In gas to be condensed 99% composition can be reclaimed, organic efficiency is very high by condensation, further, since gas to be condensed is first
Entrance frosting condenser, so on the one hand the temperature of gas to be condensed can carry out defrost to frosting condenser, saves
In order to defrost needs the heat energy that is additionally provided and time, on the other hand frosting condenser also can first will be pre- for gas to be condensed
Cold, enable some of a relatively high boiling component in gas to be condensed in frosting condenser just be condensed recovery moreover it is possible to
Enough prevent due to the temperature difference larger, gas to be condensed, after entering into non-frosting condenser, makes non-frosting condenser easily in short-term
Interior frosting, in addition, the present invention treats condensed gas by the way of two condensers are contacted and is condensed, and is prevented from
Because be forced after a condenser frosting stop condensation work, improve working performance, in addition, in the present invention condenser heat exchanger tube
Can arrange is very compact, makes that whole condensation vessel volume is less, and cost is relatively low.As can be seen here, compared with prior art, the present invention
Middle gas condensation process and equipment, by reasonable heat exchange, take full advantage of the energy of internal system, energy loss is little, save energy
Source.
Preferably, described before gas to be condensed being sequentially passed through the step of the condensation of two condensers of series winding, also
Comprise the steps of：
Detect the whether frosting of described two condensers；
If there being a condenser frosting in described two condensers, described gas to be condensed is first passed through frosting cold
Cooled down in condenser, then the gas described to be condensed obtaining after the cooling of the described condenser of frosting is passed through non-frosting
Condensed in condenser, obtained liquid or the solid-state of described gas to be condensed；
If all non-frosting of described two condensers, described gas to be condensed is first passed through in described two condensers
Directly condensed in any one condenser, obtained liquid or the solid-state of described gas to be condensed.
In the present invention, gas condensation process can detect which condensation in two condensers before gas is condensed
Device frosting, according to condenser, frosting flexible arrangement gas to be condensed enters the sequencing of two condensers.
Preferably, in the described two condensers of described the detection whether step of frosting, comprise following sub-step：
It is passed through described gas to be condensed in described two condensers；
Measure the pressure difference of gas to be condensed described in the import and export of described two condensers respectively；
If the pressure difference of the import and export of described condenser measuring is more than or equal to preset value, judge this condenser
Frosting.
In the present invention, the whether frosting of two condensers of detection, can directly pass through to measure condenser import and export gas to be condensed
The pressure difference of body is learnt, simple to operate, and it is convenient to realize.
Preferably, described after detecting all non-frosting of described two condensers, described gas to be condensed is being carried out
Before condensation, also comprise the steps of：
Operator selects series operation pattern or parallel running mode；
As operator selects parallel running mode, then two condensers of described series winding are switched to and connect, treat described
A part for condensed gas is passed through in the one of condenser in described two condensers and accepts condensation, and remainder is passed through separately
Accept condensation in an outer condenser, obtain liquid or the solid-state of described gas to be condensed.
In the present invention, if technique needs, two condensers of series winding can be changed to and connect, and two condensers even
It is applied to the occasions such as peak flow and dump.
Preferably, described gas to be condensed is volatile Organic substance or oil gas.
Gas to be condensed in the present invention is mainly volatile organic matter or oil gas, solves volatility in prior art organic
Thing and the problem of petroleum vapor recovery utilization, are related to environmental pollution and health, significant.
Preferably, gas converting heat pipe to be condensed, low-temperature receiver heat exchanger tube and housing are all comprised in described two condensers, and described
It is heat transfer zone in housing；
Described gas converting heat pipe to be condensed is parallel with low-temperature receiver heat exchanger tube, and described gas converting heat pipe to be condensed and low-temperature receiver heat exchange
Pipe is respectively positioned in described heat transfer zone；
The buffer gas that gas to be condensed in described gas converting heat pipe to be condensed passes through in described heat transfer zone is cold with described
Low-temperature receiver in the heat exchanger tube of source carries out heat exchange.
In gas condensation equipment in the present invention, two condenser structures of series winding are identical, gas converting heat pipe to be condensed and low-temperature receiver
Heat exchanger tube is separate, and is separated by tube wall with heat transfer zone, ensure that after condensation terminates low-temperature receiver and buffer gas not by
Pollution, can be with recycling, and the buffer gas in the present invention generally uses noble gases, and the buffer gas after heat exchange can be used
In inertia protection, such as pressure-and-vacuum release valve, noble gases substitute air, can reduce the impact to Oil-gas Separation for the moisture, and
Reduce operating cost etc. further, the liquid of condensed gas to be condensed or solid-state also can easily be collected；Gas to be condensed
The heat exchange between the low-temperature receiver in gas to be condensed and low-temperature receiver heat exchanger tube in body heat exchanger tube is by the buffer gas in heat transfer zone
Complete, due to the presence of buffer gas, can avoid because due to excessive temperature differentials between gas to be condensed and low-temperature receiver as far as possible
Easily frosting in heat exchanger tube.
Preferably, described gas condensation equipment also comprises deflection plate, and after described housing comprises heat exchange, buffer gas goes out
Mouth and low-temperature receiver tube-side inlet；
Described low-temperature receiver tube-side inlet is connected with the lower end of described low-temperature receiver heat exchanger tube, and described low-temperature receiver tube-side inlet changes described
On buffer gas outlet after heat；
In described deflection plate heat transfer zone between buffer gas outlet after described low-temperature receiver tube-side inlet and heat exchange.
In the present invention, the Position Design of buffer gas outlet after heat exchange is become the position less than low-temperature receiver tube-side inlet, in heat exchange
Heat transfer zone setting deflection plate between buffer gas outlet and low-temperature receiver tube-side inlet afterwards, cold buffer gas passes through deflection plate stream
Dynamic, only contact with hot gas converting heat pipe to be condensed, gas to be condensed is cooled, cold buffer gas is heated, so heat exchange
The temperature that buffer gas afterwards leaves condenser is higher, liquid nitrogen high cold energy utilization rate.
Preferably, described housing also comprises the outlet of cold source gas tube side and cold source gas shell side inlet；
Described cold source gas tube side outlet is connected with the upper end of described low-temperature receiver heat exchanger tube and cold source gas shell side inlet.
Due to there is the temperature difference between the low-temperature receiver in the buffer gas in heat transfer zone and low-temperature receiver heat exchanger tube, low-temperature receiver enters low-temperature receiver and changes
Can be with buffer gas heat exchange after heat pipe, the cold energy that buffer gas absorbs low-temperature receiver becomes cold buffer gas, and low-temperature receiver absorbs buffering gas
The heat of body becomes gaseous state and flows to cold source gas tube side exit, enters further towards the cold source gas shell side inlet being attached thereto
Enter in housing, further reduce buffer gas temperature, thus realize between low-temperature receiver and gas to be condensed with buffer gas be
The heat exchange of heat catalysis.
Preferably, gas-liquid separation chamber and lower gas-liquid separation chamber are also all comprised in described two condensers；
Described upper gas-liquid separation chamber and lower gas-liquid separation chamber are respectively positioned at top and the bottom of described housing, and described upper gas
Liquid separation chamber is connected with described lower gas-liquid separation chamber by described gas converting heat pipe to be condensed.
Upper gas-liquid separation chamber and lower gas-liquid separation chamber be used for gas to be condensed is condensed after liquid and gaseous state carry out point
From reclaiming discharge, when gas flow to be condensed fluctuating is very big, gas to be condensed can be carried droplet secretly and enter upper gas-liquid separation chamber,
Now need to separate gas to be condensed with droplet by upper gas-liquid separation chamber, or treating after upper level condenser pre-cooling
Condensed gas is carried droplet secretly and is entered lower gas-liquid separation chamber, and due to space enlargement, gas gas flows decrease to be condensed, during stop
Between longer, droplet will be separated with gas gas to be condensed, forms condensed fluid, and condensed fluid is by the pipe along heat exchanger tube to be condensed
Wall reclaims after flowing into lower gas-liquid separation chamber from top to bottom, and the on-condensible gas composition in gas to be condensed will be along heat exchange to be condensed
The tube wall of pipe is discharged into air after flowing to gas-liquid separation chamber from bottom to top.
Preferably, described gas condensation equipment also comprises condensed fluid collecting tank, and also all wraps in described two condenser
Containing non-condensable gas export and condensate outlet；
Described non-condensable gas export is connected with described upper gas-liquid separation chamber, described condensate outlet and described lower gas-liquid separation
Room is connected, and described lower gas-liquid separation chamber is connected with described condensed fluid collecting tank.
After condensation, gas outlet is connected with upper gas-liquid separation chamber, the on-condensible gas composition in gas to be condensed after being easy to condense
Enter air, condensate outlet is connected with lower gas-liquid separation chamber, and lower gas-liquid separation chamber is connected with condensed fluid collecting tank, be easy to condense
Liquid reclaims after lower gas-liquid separation chamber flows into condensed fluid collecting tank.
Preferably, the built-in gas distributor of described lower gas-liquid separation chamber, and have to be condensed in described lower gas-liquid separation chamber
Gas access；
Described gas distributor is connected with described gas access to be condensed.
The built-in gas distributor of lower gas-liquid separation chamber is so that can be distributed equal after gas to be condensed enters lower gas-liquid separation chamber
Gas converting heat pipe to be condensed is entered by tube sheet evenly and carry out heat exchange.
Preferably, described two condensers also all comprise differential pressure gauge；
Described differential pressure gauge is connected with described gas access to be condensed and non-condensable gas export respectively, described two for detecting
Pressure difference between condenser import and export.
Being designed to of differential pressure gauge easily detect condenser import and export between pressure difference, whether to judge condenser
Frosting, simple.
Preferably, described gas converting heat pipe to be condensed and low-temperature receiver heat exchanger tube are wound form coil pipe.
Wound form coil pipe is larger with buffer gas contact area about, beneficial to the gas to be condensed in pipe and low-temperature receiver with
The abundant heat exchange of buffer gas around pipe.
Preferably, described low-temperature receiver is liquid nitrogen, and described buffer gas is nitrogen.
The preferred low-temperature receiver of the present invention and the form not of the same race that buffer gas is same material, on the one hand avoid mutual dirt
Dye, on the other hand in the present invention, because the enthalpy of nitrogen is much smaller than the enthalpy of liquid nitrogen, therefore, as long as the temperature control of nitrogen
The temperature of each component fusing point in higher than gas to be condensed, gas to be condensed would not be due to knot in gas converting heat pipe to be condensed
Frost and block.
Brief description
Fig. 1 is according to gas condensation process flow chart in first embodiment of the invention；
Fig. 2 is gas condensation process flow chart in second embodiment of the invention；
Fig. 3 is gas condensation equipment schematic diagram in third embodiment of the invention.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with each reality to the present invention for the accompanying drawing
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands that the application proposes many ins and outs.But, even if there is no these ins and outs and base
In following embodiment many variations and modification it is also possible to realize each claim of the application technical side required for protection
Case.
The first embodiment of the present invention is related to a kind of gas condensation process, comprises the steps of：
Two condensers that gas to be condensed is passed through series winding successively are condensed, and obtain the liquid of gas to be condensed or solid
State；
Wherein, cooled down in the condenser of frosting first gas to be condensed being passed through in two condensers, then will be passed through
After the cooling of frosting condenser, gas to be condensed is passed through in the non-frosting condenser in two condensers and is condensed.
Idiographic flow is as shown in Figure 1.
Step 101：Whether there is a condenser frosting in two condensers of detection.
Specifically, first in two condensers, it is passed through partly gas to be condensed, then measure two condensers respectively
The pressure difference of the above-mentioned gas to be condensed of import and export, if the pressure difference recording is more than or equal to preset value, corresponding that is cold
Condenser frosting, in the present embodiment, this preset value can be set to 2 kPas, directly treated cold by measurement condenser import and export
The pressure difference of solidifying gas learns the whether frosting of two condensers, simple to operate, and it is convenient to realize.
If the pressure difference being tested with a condenser import and export is more than or equal to 2 kPas, enter step 102.
Step 102：Remaining gas to be condensed is passed through and is cooled down in frosting condenser.
Gas to be condensed in present embodiment is primarily directed to volatile Organic substance or oil gas, solves in prior art
Volatile organic matter and the problem of petroleum vapor recovery utilization, are related to environmental pollution and health, significant.
Then step 103：Gas to be condensed is passed through in non-frosting condenser and is condensed.
, after first the cooling of frosting condenser, in gas to be condensed, some fusing points are higher for gas to be condensed
Branch is become to be condensed, also the relatively low gas componant of remainder fusing point is not condensed, now, these residual gases become
Divide to enter and in non-frosting condenser, continue condensation.
Then step 104：Obtain liquid or the solid-state of gas to be condensed.
The final purpose of present embodiment be as far as possible by all the components in gas to be condensed be all condensed into liquid or
Solid-state, is condensed with gas condensation process in present embodiment, can by gas to be condensed in 99% composition all condense
Become liquid or solid-state to reclaim, be compared to prior art, the response rate is higher.Table 1 show respectively through present embodiment
The comparison sheet of indices after compression condensation process in middle gas condensation process and prior art.
Table 1
As shown in Table 1, in the case of gas flow to be condensed and composition identical, the condensation process in present embodiment is relatively
Compression condensation process condensation temperature is low, pressure and concentration of emission all low it is most important that, the condensation method energy of present embodiment
It is enough that when gas reclaiming rate to be condensed reaches 99%, refrigeration work consumption consumption is much smaller than compression condensation process, this is because this reality
Mode of applying, by reasonable heat exchange, makes full use of the energy of internal system, has reached that energy loss is little, and liquid nitrogen consumption is relatively low, thus
Save energy.
So far, the condensation process that a condenser is in frosting state is had to terminate in two condensers.
If detecting all non-frosting of two condensers in step 101, enter step 105.
Step 105：Gas to be condensed is passed through in any one condenser in two condensers and is directly condensed.
If what step 105 was said is that two condensers all do not have frosting, first which gas to be condensed is passed into cold
In condenser condensation can because between two condensers be series winding, be easier realize switching.
Then step 104：Obtain liquid or the solid-state of gas to be condensed.
So far, the condensation process of all non-frosting of two condensers terminates.
Compared with prior art, in the present invention, gas condensation process is two condensations that gas to be condensed is first passed through series winding
Cooled down in the condenser of frosting in device, then be passed through in non-frosting condenser and condensed, through this two condensers
In gas to be condensed 99% composition can be reclaimed, organic efficiency is very high by condensation, further, since gas to be condensed is first
Entrance frosting condenser, so on the one hand the temperature of gas to be condensed can carry out defrost to frosting condenser, saves
In order to defrost needs the heat energy that is additionally provided and time, on the other hand frosting condenser also can first will be pre- for gas to be condensed
Cold, enable some high boiling point compositions in gas to be condensed to be just condensed recovery in frosting condenser additionally it is possible to prevent
Because the temperature difference is larger, gas to be condensed, after entering into non-frosting condenser, makes non-frosting condenser easily tie at short notice
Frost, in addition, the present invention treats condensed gas by the way of two condensers are contacted and is condensed, and is prevented from because of one
It is forced after individual condenser frosting to stop condensation work, improve working performance, in addition, the heat exchanger tube of condenser can set in the present invention
That puts is very compact, makes that whole condensation vessel volume is less, and cost is relatively low.As can be seen here, compared with prior art, gas in the present invention
Condensation process and equipment, by reasonable heat exchange, take full advantage of the energy of internal system, energy loss is little, save energy.
In addition, it is noted that in actual applications, the step 101 in present embodiment need to be periodically executed, one
Denier has detected a condenser and has been in frosting state, then enter step 102.
Second embodiment of the present invention is related to a kind of gas condensation process.Second embodiment is first embodiment
Improve further, mainly the improvement is that：Two condensers in gas condensation process in present embodiment can be not only
Can contact using additionally it is possible to and connect use.
Specifically, as shown in Fig. 2 after judging all non-frosting of two condensers in step 201, then entering step
204, judge whether to need two condensers of series winding are switched to and connected, series operation pattern or parallel connection are selected by operator
Operational mode.As operator selects parallel running mode, then enter step 206：Two condensers of series winding are switched to and connect,
Now, condensation, remainder are accepted in an one of condenser part for gas to be condensed being passed through in two condensers
Divide to be passed through in another one condenser and accept condensation, obtain liquid or the solid-state of gas to be condensed, be so achieved that two
Condenser simultaneously connects use.
Equally, in present embodiment, gas condensation process is also capable of the series winding use of two condensers, and series winding uses
Method with identical in first embodiment, that is, step 201～203 in Fig. 2,205 and 207 respectively with Fig. 1 in step
Rapid 101～103,105 is identical with 104, does not repeat herein.
In the present embodiment, two condensers of series winding not only can be contacted use, and can also connect use, to solve
When gas flow to be condensed is larger, by two condensers and use can be connected, increase production capacity it is adaptable to peak flow is arranged with urgent
The occasion such as put.
The relevant technical details mentioned in first embodiment are still effective in the present embodiment, in order to reduce repetition,
Here repeat no more.
The step of various methods divides above, is intended merely to describe clear, can merge into when realizing a step or
Some steps are split, is decomposed into multiple steps, as long as comprising identical logical relation, all in the protection domain of this patent
Interior.
Third embodiment of the invention is related to a kind of gas condensation equipment, comprises：Two condensers and two-way pipeline, two
Condenser is contacted by two-way pipeline, and gas to be condensed is introduced into the condenser of frosting in two condensers, through frosting
After the cooling of condenser, gas to be condensed enters the non-frosting condenser in two condensers, Jing Guowei by two-way pipeline again
After the condensation of frosting condenser, obtain liquid or the solid-state of gas to be condensed.
Specifically, as shown in figure 3, in figure 1 and 2 represents two condensers, the 3 and 4 two-way pipelines of expression respectively, 5 is cold
Lime set collecting tank.Wherein, gas converting heat pipe to be condensed (numbering 6 and 7), low-temperature receiver heat exchanger tube (numbering 8 are all comprised in two condensers
With 9) it is heat transfer zone in and housing (numbering 10 and 11), and housing, gas converting heat pipe to be condensed is parallel with low-temperature receiver heat exchanger tube, and treats
Condensed gas heat exchanger tube and low-temperature receiver heat exchanger tube are respectively positioned in heat transfer zone, and the gas to be condensed in gas converting heat pipe to be condensed passes through to change
Buffer gas in hot-zone carries out heat exchange with the low-temperature receiver in low-temperature receiver heat exchanger tube.Contact in gas condensation equipment in present embodiment
Two condenser structures identical, gas converting heat pipe to be condensed is separate with low-temperature receiver heat exchanger tube, and with heat transfer zone pass through tube wall
Separate, ensure that low-temperature receiver and buffer gas are not contaminated after condensation terminates, can buffering with recycling, in the present invention
Gas generally uses noble gases, and the buffer gas after heat exchange can be used for inertia protection, such as pressure-and-vacuum release valve, inertia
Gas instead air, can reduce the impact to Oil-gas Separation for the moisture, and reduces operating cost etc. further, condensed to be condensed
The liquid of gas or solid-state also can easily be collected；In gas to be condensed in gas converting heat pipe to be condensed and low-temperature receiver heat exchanger tube
Low-temperature receiver between heat exchange be to be completed by the buffer gas in heat transfer zone, due to the presence of buffer gas, can keep away as far as possible
Exempt from because the easy frosting in heat exchanger tube due to excessive temperature differentials between gas to be condensed and low-temperature receiver.
It is noted that above-mentioned gas converting heat pipe to be condensed and low-temperature receiver heat exchanger tube are wound form coil pipe, wound form disk
Pipe is larger with buffer gas contact area about, beneficial to the gas to be condensed in pipe and the buffer gas around low-temperature receiver and pipe
Fully heat exchange.Preferred low-temperature receiver and form not of the same race that buffer gas is same material in present embodiment, it is to avoid mutual dirt
Dye, as low-temperature receiver, nitrogen is buffer gas to preferably liquid nitrogen, because liquid nitrogen can reach -196 degrees Celsius, is conventional effect herein
Fruit preferably low-temperature receiver；On the other hand, because the enthalpy of nitrogen is much smaller than the enthalpy of liquid nitrogen, therefore, as long as the temperature control of nitrogen
The temperature of each component fusing point in higher than gas to be condensed, gas to be condensed would not be due to knot in gas converting heat pipe to be condensed
Frost and block.
Gas-liquid separation chamber's (numbering 12 and 13) and lower gas-liquid separation chamber (numbering 14 He is also all comprised in two condensers
15), upper gas-liquid separation chamber and lower gas-liquid separation chamber are located at top and the bottom of housing respectively, and upper gas-liquid separation chamber is cold by treating
Solidifying gas converting heat pipe is connected with lower gas-liquid separation chamber.Upper gas-liquid separation chamber and lower gas-liquid separation chamber are used for will be cold for gas to be condensed
Liquid after solidifying and gaseous state carry out separation and recovery discharge, and when gas flow to be condensed fluctuating is very big, gas to be condensed can be carried secretly
Droplet enters upper gas-liquid separation chamber, now needs to separate gas to be condensed with droplet by upper gas-liquid separation chamber, or
Carry gas-liquid separation chamber droplet enters secretly from the gas to be condensed after upper level condenser pre-cooling, due to space enlargement, treat cold
Solidifying gas gas flows decrease, the time of staying is longer, and droplet will be separated with gas gas to be condensed, forms condensed fluid, cold
Tube wall along heat exchanger tube to be condensed is flowed into and reclaims after lower gas-liquid separation chamber by lime set from top to bottom, not coagulating in gas to be condensed
Gas componant will flow to from bottom to top along the tube wall of heat exchanger tube to be condensed and be discharged into air after upper gas-liquid separation chamber.Wherein,
The built-in gas distributor (not shown in Fig. 3) of lower gas-liquid separation chamber, and gas access to be condensed is had on lower gas-liquid separation chamber (compile
Numbers 16 and 17), gas distributor is connected with gas access to be condensed.The built-in gas distributor of lower gas-liquid separation chamber is so that when treating
Condensed gas enters after lower gas-liquid separation chamber can enter gas converting heat pipe to be condensed by tube sheet carries out heat exchange with being evenly distributed.
Non-condensable gas export (numbering 18 and 19) and condensate outlet (numbering 20 He is also all comprised in above-mentioned two condenser
21), non-condensable gas export is connected with upper gas-liquid separation chamber, and after being easy to condense, the on-condensible gas composition of gas to be condensed enters greatly
Gas, condensate outlet is connected with lower gas-liquid separation chamber, and lower gas-liquid separation chamber is connected with condensed fluid collecting tank, is easy to condensed fluid and passes through
Lower gas-liquid separation chamber reclaims after flowing into condensed fluid collecting tank.
It is noted that detecting which frosting of above-mentioned two condenser, which non-frosting, this reality for convenience
Apply in two condensers, in mode, be also provided with differential pressure gauge (numbering 22 and 23), differential pressure gauge respectively with gas access to be condensed
It is connected with non-condensable gas export, the pressure difference between importing and exporting for two condensers of detection.Differential pressure gauge be designed to conveniently
Detect condenser import and export between pressure difference, to judge condenser whether frosting, simple.
Gas condensation equipment in present embodiment also comprises deflection plate (not shown in Fig. 3), after housing comprises heat exchange
Buffer gas outlet (numbering 24 and 25) and low-temperature receiver tube-side inlet (numbering 26 and 27), low-temperature receiver tube-side inlet and low-temperature receiver heat exchanger tube
Lower end is connected, and on low-temperature receiver tube-side inlet buffer gas outlet after heat exchange, deflection plate is located at low-temperature receiver tube-side inlet and heat exchange
Afterwards in the heat transfer zone between buffer gas outlet.In present embodiment, the Position Design of buffer gas outlet after heat exchange is become to be less than
The position of low-temperature receiver tube-side inlet, the heat transfer zone setting deflection plate between buffer gas outlet and low-temperature receiver tube-side inlet after heat exchange,
Cold buffer gas is flowed by deflection plate, only contacts with hot gas converting heat pipe to be condensed, and gas to be condensed is cooled, cold
Buffer gas is heated, so the temperature that the buffer gas after heat exchange leaves condenser is only low than gas inlet temperature to be condensed by 10
～20 DEG C, take full advantage of the cold of low-temperature receiver, reduce the consumption of low-temperature receiver.
In addition, cold source gas tube side outlet (numbering 28 and 29) and cold source gas shell side inlet (numbering are also comprised on housing
30 and 31), cold source gas tube side outlet is connected with the upper end of low-temperature receiver heat exchanger tube and cold source gas shell side inlet.Due to heat transfer zone
There is the temperature difference, low-temperature receiver enters meeting and buffer gas after low-temperature receiver heat exchanger tube between low-temperature receiver in interior buffer gas and low-temperature receiver heat exchanger tube
Heat exchange, the cold energy that buffer gas absorbs low-temperature receiver becomes cold buffer gas, and the heat that low-temperature receiver absorbs buffer gas becomes gaseous flow
To cold source gas tube side exit, enter in housing further towards the cold source gas shell side inlet being attached thereto, drop further
The temperature of low-buffer gas, thus realizes the heat exchange with buffer gas as heat catalysis between low-temperature receiver and gas to be condensed.
Understand for convenience, below will for gas to be condensed, liquid nitrogen, as nitrogen source and nitrogen be slow with volatile organic matter
As a example qi of chong channel ascending adversely body, the operation principle of the gas condensation equipment in present embodiment is described in detail.
Measure the pressure difference between two condensers import and export first by differential pressure gauge 22 and 23, judge it is which is cold
Condenser frosting, which non-frosting, assume in present embodiment that condenser 1 is non-frosting, condenser 2 is frosting, now
Condensation process as follows：
Volatile organic matter enters the lower gas-liquid separation chamber of condenser 2 bottom through valve 32 from gas access 17 to be condensed
15, directly contacted with the frost in gas converting heat pipe 7 to be condensed with lower perforated plate 33 by gas distributor, because frost is had with volatility
There is the huge temperature difference, both carry out heat exchange, frost is heated into liquid, volatile organic matter is cooled, temperature between machine thing
Degree declines (pre-cooling).Then enter upper gas-liquid separation chamber 13 through upper perforated plate 34, leave condenser from top non-condensable gas export 19
2, enter the lower gas-liquid separation chamber 14 of condenser 1 bottom through valve 35 and gas access to be condensed 16, by gas distributor and
Cold nitrogen in heat transfer zone in gas converting heat pipe 6 to be condensed and in housing 10 for the lower perforated plate 36 carries out heat exchange, gas to be condensed
Volatile organic matter in body heat exchanger tube 6 is condensed liquefaction, until solidification.On-condensible gas composition in volatile organic matter is through upper
Tube sheet 37 and upper gas-liquid separation chamber 12, leave condenser 1 from the non-condensable gas export 18 at top, then are discharged into air through valve 38
In.
Constantly solidify frosting with volatile organic matter, the resistance of the gas converting heat pipe 6 to be condensed in condenser 1 increases
Greatly, the differential pressure gauge 22 between condenser 1 import and export is more than certain numerical value, and the differential pressure gauge 23 between condenser 2 is imported and exported is less than
During certain numerical value, condenser 1 frosting, condenser 2 defrost completes, and now needs to switch over operation.Concrete operations are：Volatility
Organic substance enters the lower gas-liquid separation chamber 14 of condenser 1 bottom through valve 39 from gas access 16 to be condensed, is divided by gas
Cloth device is directly contacted with the frost in gas converting heat pipe 6 to be condensed with lower perforated plate 36, due to existing between frost and volatile organic matter
The huge temperature difference, both carry out heat exchange, and frost is heated into liquid, and volatile organic matter is cooled, temperature drop (pre-cooling).
Then enter upper gas-liquid separation chamber 12 through upper perforated plate 37, leave condenser 1 from the non-condensable gas export 18 at top, through valve 40 from
Gas access 17 to be condensed enters the lower gas-liquid separation chamber 15 of condenser 2 bottom, is being treated by gas distributor and lower perforated plate 33
The cold nitrogen in heat transfer zone in condensed gas heat exchanger tube 7 and in housing 11 carries out heat exchange, in gas converting heat pipe 7 to be condensed
Volatile organic matter is condensed liquefaction, until solidification.On-condensible gas composition in volatile organic matter is through upper perforated plate 34 and upper gas
Liquid separation chamber 13, leaves condenser 2 from the non-condensable gas export 19 at top, then is discharged in air through valve 41.
In the present embodiment, liquid nitrogen is the low-temperature receiver tube-side inlet by valve 42 or valve 43 from housing 10 or 11 sides
That condenser 1 or 2 of the 26 or 27 non-frostings of entrance, the nitrogen heat exchange outside liquid nitrogen and pipe in liquid nitrogen heat exchanger tube 8 or 9,
Liquid nitrogen is gasified, and generates cold nitrogen and exports 28 or 29 through cold source gas tube side, enters shell from cold source gas shell side inlet 30 or 31
Body 10 or 11, the space along between liquid nitrogen heat exchanger tube 8 or 9 pipes, from top to bottom screw.Due to the temperature of cold nitrogen, it is higher than
Liquid nitrogen, runs into liquid nitrogen heat exchanger tube 8 or 9, and cold nitrogen makes liquid nitrogen gasification, and cold nitrogen is further cooled；Again because the temperature of cold nitrogen
Degree, less than volatile organic matter, runs into gas converting heat pipe 6 or 7 to be condensed, cold nitrogen condenses volatile organic matter, makes volatility
Organic substance liquefaction, solidification, cold nitrogen is heated, and the buffer gas outlet 24 or 25 after heat exchange of the hot nitrogen after heat exchange is discharged, whole
During individual, the nitrogen in housing 10 or 11 plays the effect of a heat catalysis.
In whole condensation process, it is condensed down in gas converting heat pipe to be condensed, upper gas-liquid separation chamber and lower gas-liquid separation chamber
The volatile organic matter coming always from top to bottom, leaves from the condensate outlet 20 or 21 of condenser bottom, through valve 44 or valve
Door 45 is collected in condensed fluid holding vessel 5.
It is noted that when being condensed in the case of the non-frosting of condenser 1, condenser 2 frosting, valve to be closed
39,41 and 43；When being condensed in the case of the non-frosting of condenser 2, condenser 1 frosting, valve 32,42 and 38 to be closed.
Above-mentioned be disposed to make gas to be condensed in condenser 1 frosting, because valve 32 is closed, just can only first pass through valve 39 first
It is introduced into condenser 1, in condenser 2 frosting, because valve 39 is closed, just can only first pass through valve 32 and initially enter condenser
2；Gas to be condensed is made to be condensed being directly entered non-frosting condenser after frosting condenser, without by valve
41 or 38 device for transferring；Low-temperature receiver is made no longer to be passed through low-temperature receiver by valve 42 in condenser 1 in condenser 1 frosting, but only
Low-temperature receiver is passed through in condenser 2 by valve 43.
The switching of the whole condensation process in present embodiment and valve is all to be automatically controlled by PLC, is user-friendly to.
It is seen that, present embodiment is the system embodiment corresponding with first embodiment, and present embodiment can be with
First embodiment is worked in coordination enforcement.The relevant technical details mentioned in first embodiment still have in the present embodiment
Effect, in order to reduce repetition, repeats no more here.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in
In first embodiment.
Four embodiment of the invention is related to a kind of gas condensation equipment.4th embodiment is entering of the 3rd embodiment
One step is improved.Mainly the improvement is that, larger in gas flow ratio to be condensed, and two condensers all non-frosting when, this enforcement
Two condensers of series winding can be switched to and connect by the gas condensation equipment in mode, treated cold using two condensers simultaneously
Solidifying gas is condensed, and can effectively increase condensation yield.Concrete implementation mode is as follows：
And when the mode that connects operates (now valve 35 and 40 is closed mode), gas to be condensed passes through valve 32 and 39 points
Jin Ru there is not gas-liquid separation chamber 14 and 15 under the bottom of two condensers 1 and 2, then through gas distributor and lower perforated plate 36 and 33
In gas converting heat pipe 6 and 7 to be condensed with pipe outside cold nitrogen heat exchange, gas to be condensed is condensed, liquefies, solidifies.Incoagulability
Gas leaves condenser 1 He through upper perforated plate 37 and 34 and upper gas-liquid separation chamber 12 and 13 from the non-condensable gas export 18 and 19 at top
2, it is emitted in air through valve 38 and 41.
4th embodiment is the improvement further of the 3rd embodiment, and the correlation technique mentioned in the 3rd embodiment is thin
Section is still effective in the present embodiment, and the technique effect that can reach in the third embodiment is also same in the present embodiment
Sample is it is achieved that in order to reduce repetition, repeat no more here.Correspondingly, the relevant technical details mentioned in present embodiment
Can be applicable in the 3rd embodiment.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (15)
1. a kind of gas condensation process is it is characterised in that comprise the steps of：
Two condensers that gas to be condensed is passed through series winding successively are condensed, and obtain the liquid of described gas to be condensed or solid
State；
Wherein, cooled down in the condenser of frosting first described gas to be condensed being passed through in described two condensers, then will
The gas described to be condensed obtaining after the cooling of the described condenser of frosting is passed through the non-frosting in described two condensers
Condensed in condenser.
2. gas condensation process according to claim 1 is it is characterised in that be passed through string described successively by gas to be condensed
Before the step that two condensers even are condensed, also comprise the steps of：
Detect in described two condensers, whether there is a condenser frosting；
If there being a condenser frosting in described two condensers, described gas to be condensed is first passed through frosting condenser
In cooled down, then the gas described to be condensed obtaining after the cooling of the described condenser of frosting is passed through non-frosting condensation
Condensed in device, obtained liquid or the solid-state of described gas to be condensed；
If all non-frosting of described two condensers, described gas to be condensed is first passed through any in described two condensers
Directly condensed in one condenser, obtained liquid or the solid-state of described gas to be condensed.
3. gas condensation process according to claim 2 is it is characterised in that be in the described two condensers of described detection
No have in the condenser step of frosting, comprises following sub-step：
It is passed through described gas to be condensed in described two condensers；
Measure the pressure difference of gas to be condensed described in the import and export of described two condensers respectively；
If the pressure difference of the import and export of described condenser measuring is more than or equal to preset value, judge that this condenser is tied
Frost.
4. gas condensation process according to claim 2 is it is characterised in that detecting two described condensers all not
After frosting, before described gas to be condensed is condensed, also comprise the steps of：
Operator selects series operation pattern or parallel running mode；
As operator selects parallel running mode, then two condensers of described series winding are switched to and connect, will be described to be condensed
A part for gas is passed through in the one of condenser in described two condensers and accepts condensation, and remainder is passed through other one
Accept condensation in individual condenser, obtain liquid or the solid-state of described gas to be condensed.
5. gas condensation process according to any one of claim 1 to 4 is it is characterised in that described gas to be condensed is
Volatile Organic substance or oil gas.
6. a kind of gas condensation equipment is it is characterised in that comprise：Two condensers and two-way pipeline；
Described two condensers pass through described two-way pipeline series winding；
Gas to be condensed is introduced into the condenser of frosting in described two condensers, through the cooling of the described condenser of frosting
Afterwards, described gas to be condensed enters the non-frosting condenser in described two condensers, Jing Guosuo again by described two-way pipeline
After stating the condensation of non-frosting condenser, obtain liquid or the solid-state of described gas to be condensed.
7. gas condensation equipment according to claim 6 is it is characterised in that all comprise to be condensed in described two condenser
It is heat transfer zone in gas converting heat pipe, low-temperature receiver heat exchanger tube and housing, and described housing；
Described gas converting heat pipe to be condensed is parallel with low-temperature receiver heat exchanger tube, and described gas converting heat pipe to be condensed and low-temperature receiver heat exchanger tube equal
In described heat transfer zone；
Gas to be condensed in described gas converting heat pipe to be condensed is changed with described low-temperature receiver by the buffer gas in described heat transfer zone
Low-temperature receiver in heat pipe carries out heat exchange.
8. gas condensation equipment according to claim 7, it is characterised in that also comprising deflection plate, described housing comprises
Buffer gas outlet and low-temperature receiver tube-side inlet after heat exchange；
Described low-temperature receiver tube-side inlet is connected with the lower end of described low-temperature receiver heat exchanger tube, and described low-temperature receiver tube-side inlet is after described heat exchange
On buffer gas outlet；
In described deflection plate heat transfer zone between buffer gas outlet after described low-temperature receiver tube-side inlet and heat exchange.
9. gas condensation equipment according to claim 7 is it is characterised in that also comprise cold source gas tube side on described housing
Outlet and cold source gas shell side inlet；
Described cold source gas tube side outlet is connected with the upper end of described low-temperature receiver heat exchanger tube and cold source gas shell side inlet.
10. gas condensation equipment according to claim 7 is it is characterised in that also all comprise in described two condenser
Gas-liquid separation chamber and lower gas-liquid separation chamber；
Described upper gas-liquid separation chamber and lower gas-liquid separation chamber are respectively positioned at top and the bottom of described housing, and described upper gas-liquid is divided
It is connected with described lower gas-liquid separation chamber by described gas converting heat pipe to be condensed from room.
11. gas condensation equipments according to claim 10 are it is characterised in that also comprise condensed fluid collecting tank and described
Non-condensable gas export and condensate outlet is also all comprised in two condensers；
Described non-condensable gas export is connected with described upper gas-liquid separation chamber, described condensate outlet and described lower gas-liquid separation chamber phase
Even, described lower gas-liquid separation chamber is connected with described condensed fluid collecting tank.
12. gas condensation equipments according to claim 11 are it is characterised in that the built-in gas of described lower gas-liquid separation chamber divides
On cloth device, and described lower gas-liquid separation chamber, there is gas access to be condensed；
Described gas distributor is connected with described gas access to be condensed.
13. gas condensation equipments according to claim 12 are it is characterised in that described two condenser also all comprises differential pressure
Meter；
Described differential pressure gauge is connected with described gas access to be condensed and non-condensable gas export respectively, for detecting described two condensations
Pressure difference between device import and export.
14. gas condensation equipments according to claim 7 are it is characterised in that described gas converting heat pipe to be condensed and low-temperature receiver
Heat exchanger tube is wound form coil pipe.
15. gas condensation equipments according to claim 7 it is characterised in that described low-temperature receiver be liquid nitrogen, described buffer gas
For nitrogen.
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| TWI602610B (en) * | 2016-03-03 | 2017-10-21 | Mao-Sui Guo | Gas recovery and purification device |
| CN105782702A (en) * | 2016-04-11 | 2016-07-20 | 安庆市凌康机电产品设计有限公司 | Heat exchangeable type gas condensation device |
| CN109269710B (en) * | 2018-10-31 | 2020-07-21 | 北京建筑大学 | Pressure monitoring system and method for pulsating heat pipe |
| CN109847399A (en) * | 2019-04-11 | 2019-06-07 | 代金霞 | A kind of volatile materials condensation recycling method and device to be run without interruption using gas self heat defrosting |
| CN113122302B (en) * | 2019-12-31 | 2023-04-07 | 中国石油化工股份有限公司 | Condensation method oil gas recovery method and device |
| CN114437753B (en) * | 2020-10-31 | 2023-09-01 | 中国石油化工股份有限公司 | Condensing oil gas recovery method and device |
| CN112611253B (en) * | 2020-12-01 | 2022-06-07 | 内蒙古金石镁业有限公司 | Automatic cleaning device for cooler and cleaning control method thereof |
| CN115068969A (en) * | 2022-06-10 | 2022-09-20 | 江苏大恒环保设备制造有限公司 | Benzene tail gas condensation recovery treatment method and device |
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