CN104826446B - The absorbing recovery device of a kind of acrylonitrile gas and recovery method - Google Patents
The absorbing recovery device of a kind of acrylonitrile gas and recovery method Download PDFInfo
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- CN104826446B CN104826446B CN201510288652.4A CN201510288652A CN104826446B CN 104826446 B CN104826446 B CN 104826446B CN 201510288652 A CN201510288652 A CN 201510288652A CN 104826446 B CN104826446 B CN 104826446B
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Abstract
The present invention discloses absorbing recovery device and the recovery method of a kind of acrylonitrile gas, including condensing circuit and alternating temperature pressure-variable adsorption loop, described condensing circuit includes that ice chest heat exchanger, explosion-proof refrigeration compressor, restricting element, condensing heat exchanger, gas-liquid separator, described alternating temperature pressure-variable adsorption loop include the sprinkling irrigation of frequency conversion air pump, Recuperative heat exchanger, three-way switch valve, ice chest heat exchanger, liquid-proof, alternating temperature pressure-swing absorption apparatus, anti-explosion vacuum pump；The present invention reclaims and purifies acrylonitrile gas by condensation, alternating temperature pressure-variable adsorption loop, and final acrylonitrile gas concentration reaches milligram level, and stops unit and be in operation generation secondary pollution.
Description
Technical field
The present invention relates to the retracting device of a kind of gas, dress is reclaimed in the absorption being specifically related to a kind of acrylonitrile gas
Put and recovery method.
Background technology
Due to acrylonitrile volatile organic matter producing, store, transport, sell, be very easy to during use etc.
Volatilization, thus produce extremely serious acrylonitrile gas fixed discharge source, not only cause resources loss, more constitute potential
Fire hazard, the most poisonous acrylonitrile gas severe contamination environment, harm worker's is healthy.
So far, market not yet there are met petrochemical plant, depots and the transfer storage facility etc. of maturation there is acrylonitrile
The acrylonitrile that the place of gaseous volatilization discharge uses reclaims and does not produce secondary pollution and the device of energy qualified discharge.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, first purpose of the present invention is to provide one and utilizes cold
The continuous coo1ing fractional condensation solidifying, alternating temperature pressure swing adsorption realizes acrylonitrile gas is reclaimed and the retracting device of qualified discharge；The
Two purposes are to provide a kind of cooling water that need not and can be achieved with the device of adsorbent cooling；3rd purpose is to provide one
Use said apparatus to realize the method that acrylonitrile gas reclaims, stop acrylonitrile gas and reclaim the secondary pollution produced and can reach
Mark discharge.
Technical scheme: in order to solve above-mentioned technical problem, the absorption that the invention provides a kind of acrylonitrile gas is reclaimed
Device, including condensing circuit, alternating temperature pressure-variable adsorption loop, described condensing circuit includes the explosion-proof refrigerant compression sequentially connected
Machine, condensing heat exchanger, restricting element, ice chest heat exchanger, gas-liquid separator, described gas-liquid separator and explosion-proof refrigeration pressure
Contracting machine connects；Described ice chest exchanger base offers liquid outlet；
Alternating temperature pressure-variable adsorption loop include frequency conversion air pump, Recuperative heat exchanger, three-way switch valve, ice chest heat exchanger, liquid-proof spray cans,
Alternating temperature pressure-swing absorption apparatus, anti-explosion vacuum pump；Alternating temperature pressure-swing absorption apparatus includes adsorption tanks, intake valve, parsing valve, row
Air valve, described adsorption tanks include adsorbing tank body, being placed on the adsorbent of adsorption tanks intracoelomic cavity and make adding of adsorbent reactivation
Thermal analysis apparatus；Described oil gas entrance is connected with the entrance of frequency conversion air pump by the second spark arrester, and frequency conversion wind delivery side of pump leads to
Cross the first spark arrester to be connected with the import of Recuperative heat exchanger the first inlet channel, the outlet of the first inlet channel and ice chest heat exchange
The liquid passage inlet of device is connected, and the gas circuit outlet of ice chest heat exchanger is connected with three-way switch valve import, the first of three-way switch valve
Outlet is connected with the import of the first return gas channel of Recuperative heat exchanger, the outlet of the first return gas channel and liquid-proof spray cans entrance phase
Even, the second outlet of three-way switch valve is also connected with liquid-proof spray cans entrance, and liquid-proof spray cans exports by intake valve and adsorption tanks
Air inlet bottom body is connected, and connecting between air inlet and the intake valve outlet of absorption tank base has the import resolving valve,
The outlet resolving valve is connected by the entrance of anti-explosion vacuum pump with frequency conversion air pump；Offer bottom described Recuperative heat exchanger and first
The leakage fluid dram of inlet channel connection；
The gas outlet on described absorption tank body top is connected with high-altitude cylinder by air bleeding valve, the 3rd spark arrester.
As preferably, the thermal analysis apparatus that adds of described alternating temperature pressure-swing absorption apparatus includes being arranged on adsorption tanks intracoelomic cavity
Inner coil pipe, the sidewall of absorption tank body is provided with first interface and the second interface；This inner coil pipe entrance point passes first interface and steaming
Vapour enters the outlet of valve and connects, and this inner coil pipe port of export goes out valve import through the second interface and is connected with steam.
As preferably, inner coil pipe is helical form rustless steel inner coil pipe.
As preferably, it is arranged side by side first in described ice chest heat exchanger and has changed greenhouse and second and change greenhouse, described
One changes greenhouse includes the outlet of liquid passage inlet, gas circuit, the second inlet channel of parallel longitudinal setting and the second return gas channel；The
Two change greenhouse includes the 3rd inlet channel and the 3rd return gas channel of parallel longitudinal setting；Described liquid passage inlet is successively with second
Inlet channel, the 3rd inlet channel, the 3rd return gas channel, the second return gas channel, gas circuit outlet constitute heat exchanger channels；
Described liquid outlet correspondence respectively is opened in and first changes greenhouse, second changes greenhouse bottom, and each liquid outlet all connects with heat exchanger channels.
As preferably, described first changes greenhouse also includes first parallel with the second inlet channel, the second return gas channel
Refrigerant line；Described second changes greenhouse also includes the second refrigerant parallel with the 3rd inlet channel, the 3rd return gas channel
Pipeline；Described restricting element includes low temperature field restricting element, pre-awkward silence at a meeting restricting element；The import of the first refrigerant line is led to
Crossing pre-awkward silence at a meeting restricting element to connect with condensing heat exchanger, the outlet of the first refrigerant line is by evaporating pressure regulating valve and gas
Liquid/gas separator connects；The import of described second refrigerant pipeline is connected with condensing heat exchanger by low temperature field restricting element, the
The outlet of two refrigerant lines connects with gas-liquid separator.
As preferably, at described each liquid outlet, it is equipped with switch valve.
The recovery method of the absorbing recovery device of described acrylonitrile gas, comprises the following steps:
1. condensation at low temperature step: include the first condensation at low temperature step and the second condensation at low temperature step:
First condensation at low temperature step:
Acrylonitrile gas is sent in ice chest heat exchanger by Recuperative heat exchanger by frequency conversion air pump, through the circulating cooling of condensing circuit,
Acrylonitrile gas is made to condense in ice chest heat exchanger, through the switching of three-way switch valve, the low temperature third after condensation process
Alkene nitrile gas is directly entered liquid-proof spray cans；
Second condensation at low temperature step: acrylonitrile gas is sent in ice chest heat exchanger by Recuperative heat exchanger by frequency conversion air pump, through supercool
The circulating cooling in solidifying loop, makes acrylonitrile gas condense in ice chest heat exchanger, through the switching of three-way switch valve,
Low temperature acrylonitrile gas backstreaming after condensation process, to Recuperative heat exchanger, is handed over the acrylonitrile air heat entering Recuperative heat exchanger
While swap-in row warming up treatment, the acrylonitrile gas entering Recuperative heat exchanger is carried out pre-cooling, the propylene after warming up treatment
Nitrile gas enters in liquid-proof spray cans；Pre-cooling and the condensation of ice chest heat exchanger, the third of 90%～98% in Recuperative heat exchanger
Alkene nitrile gas is cooled to liquid, the liquid outlet of the leakage fluid dram of Recuperative heat exchanger, ice chest exchanger base reclaim；
2. adsorption treatment step, including the first adsorption treatment step and the second adsorption treatment step:
First adsorption treatment step: the low temperature acrylonitrile gas after the first condensation at low temperature step condensation process is led to through liquid-proof spray cans
Toward adsorption tanks, while the low temperature acrylonitrile gas absorption after condensation process is processed by adsorption tanks internal adsorption agent, carry out cold and hot
Exchange makes adsorbent cool down, and cooling enters the second adsorption treatment step after terminating, and the valve of switching three-way switching simultaneously enters second
Condensation at low temperature step；
Second adsorption treatment step: the acrylonitrile gas after the second condensation at low temperature step warming up treatment is input to inhale by liquid-proof spray cans
Carrying out adsorption treatment in attached tank, the gas after adsorption treatment is drained in air；
3. activating and regenerating step, including:
To step 2. in the inner coil pipe adsorbed in saturated adsorption tanks after the second adsorption treatment step is passed through steam pair
Adsorbent carries out adding Thermal desorption, by absorption acrylonitrile desorbing gas in adsorbent step out；And
Open anti-explosion vacuum pump to adsorption tanks evacuation, then open air bleeding valve and carry out back pressure, enter the first adsorption treatment step；
4. recycle step: by step 3. in desorption that adsorption tanks evacuation is obtained acrylonitrile gas out, transport is to becoming
Frequently the entrance of air pump, enters next first or second condensation at low temperature step.
As preferably, the 1. described acrylonitrile gas of step enters in ice chest heat exchanger by Recuperative heat exchanger, successively
In ice chest heat exchanger first is changed greenhouse, second changes greenhouse and the cold and hot exchange of cold-producing medium and carry out condensation process simultaneously,
Obtain the acrylonitrile gas of-43～-37 DEG C eventually；Then-43～the acrylonitrile gas of-37 DEG C sequentially pass through second change greenhouse,
One changes greenhouse carries out warming up treatment, forms the low temperature acrylonitrile gas after condensation process；First treatment temperature changing greenhouse is
1～7 DEG C, second changes the treatment temperature in greenhouse for-43～-37 DEG C.
The high-temperature high-pressure refrigerant gas that condensing circuit of the present invention is produced by explosion-proof refrigeration compressor, condensed
After heat exchanger is condensed into high-pressure sub-cooled liquid, then in restricting element is transported to ice chest heat exchanger, cold-producing medium evaporation absorption third
The heat vaporization of alkene nitrile gas, makes the cooling liquefaction of acrylonitrile gas.
Inner coil pipe is spiral helicine stainless steel pipes, and during parsing, saturated vapor enters valve by steam and enters into inner coil pipe,
Convective Heating adsorbing medium, it is achieved the parsing regeneration of adsorbent, the acrylonitrile gas obtained after parsing is through anti-explosion vacuum pump
Vacuum drawn, enters the entrance of the frequency conversion air pump of front end, alternating temperature pressure-variable adsorption loop, enters and reclaims circulation next time.
Beneficial effect: (1) present invention reclaims and purify acrylonitrile gas by condensing circuit, alternating temperature pressure-variable adsorption loop
Body, the requirement that final acrylonitrile gas concentration reaches GB or terrestrial reference specifies, complete qualified discharge；(2) the adopting of the present invention
With three-way switch valve and Recuperative heat exchanger, the low temperature acrylonitrile gas after condensation process can be made to be directly entered adsorption tanks to complete
Become the adsorbent resolved to cool down, make adsorbent recover room temperature；The scene of solving does not has the restriction that cold water provides, and
Utilizing low temperature acrylonitrile gas to cool down, speed faster, has simplified desorption system link simultaneously, has added reliability；(3)
Adsorbent of the present invention resolves the acrylonitrile gas of abjection and extracts through anti-explosion vacuum pump, enters the entrance of frequency conversion air pump, enters
Reclaim circulation next time, reduce exhaust emission；(4) present configuration is compact, and floor space is little, and unit after connecting is
Can be according to presetting fully automatic operation, it is not necessary to special messenger supervises；(5) mechanical moving element of the present invention is explosion-proof type, whole
Covering device and emission all meet fire-proof and explosion-proof safety criterion；(6) further, adsorbent in adsorption tanks of the present invention
Acrylonitrile gas can be passed through saturated vapor by inner coil pipe and add thermal desorption out, make adsorbent again possess activity, and
Stop unit to be in operation generation secondary pollution；(7) ice chest heat exchanger of the present invention is provided with the different greenhouses that changes, energy
Enough acrylonitrile gas is carried out gradual change cooling, reduce frost, more conducively the liquefaction of acrylonitrile gas, it is possible to right
Gas carries out warming up treatment, enters sorption cycle.
Accompanying drawing explanation
Fig. 1 is the absorbing recovery device structural representation of acrylonitrile gas of the present invention；
Fig. 2 is adsorption tanks structural representation of the present invention.
In Fig. 1, the explosion-proof refrigeration compressor of 101-, 102-condensing heat exchanger, 103-low temperature field restricting element, 104-are pre-
Awkward silence at a meeting restricting element, 105-ice chest heat exchanger, 106-evaporating pressure regulating valve, 107-gas-liquid separator, 108-backheat are changed
Hot device, 109-three-way switch valve, 201-frequency conversion air pump, 202-the first spark arrester, 203-liquid-proof spray cans, 301-are explosion-proof very
Empty pump, 302-adsorption tanks, 303-high-altitude cylinder, 401-intake valve, 402-resolve valve, 403-air bleeding valve, 501-steam enter valve,
502-steam goes out valve.
In Fig. 2,601-gas outlet, 602-charging door, 603-absorption tank body, 604-inner coil pipe, 605-high heat transfer are special
Go out with activated carbon, 606-temperature point, 607-discharge port, 608-air inlet, 609-inner coil pipe import, 610-inner coil pipe
Mouthful.
Detailed description of the invention
Below by accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to
In described embodiment.
Embodiment 1: the absorbing recovery device of a kind of acrylonitrile gas, becomes including condensing circuit, alternating temperature
Pressure absorption loop, described condensing circuit includes the explosion-proof refrigeration compressor 101 sequentially connected, condensing heat exchanger 102, saves
Fluid element, ice chest heat exchanger 105, gas-liquid separator 107, described gas-liquid separator 107 and explosion-proof refrigeration compressor 101
Connect；Liquid outlet is offered bottom described ice chest heat exchanger 105；
Described oil gas entrance is connected with the entrance of frequency conversion air pump 201 by the second spark arrester, and the outlet of frequency conversion air pump 201 is by the
One spark arrester 202 is connected with the import of Recuperative heat exchanger 108 first inlet channel, the outlet of the first inlet channel and ice chest
The liquid passage inlet of heat exchanger 105 is connected, and the gas circuit outlet of ice chest heat exchanger 105 is connected with three-way switch valve 109 import,
First outlet of three-way switch valve 109 is connected with the import of the first return gas channel of Recuperative heat exchanger 108, and the first return-air leads to
The outlet in road is connected with liquid-proof spray cans 203 entrance, three-way switch valve 109 second outlet also with liquid-proof spray cans 203 entrance
Being connected, liquid-proof spray cans 203 is exported and is connected by the air inlet of intake valve 401 with absorption tank base, adsorbs tank base
Air inlet and intake valve 401 outlet between connect have resolve valve 402 import, resolve valve 402 outlet by explosion-proof
Vacuum pump 301 is connected with the entrance of frequency conversion air pump 201；Offer and the first inlet channel bottom described Recuperative heat exchanger 108
The leakage fluid dram of connection；
The gas outlet on described absorption tank body top is connected with high-altitude cylinder 303 by air bleeding valve the 403, the 3rd spark arrester.
Described adsorption tanks include adsorbing tank body, being placed on the adsorbent of adsorption tanks intracoelomic cavity and make adsorbent reactivation
Add thermal analysis apparatus；The described effect adding thermal analysis apparatus is that adsorbent heats the gas making absorption in adsorbent
Body parses.The thermal analysis apparatus that adds of the present invention is preferably spiral helicine rustless steel inner coil pipe, and utilization is passed through saturated
Steam adds heat-adsorbent.The thermal analysis apparatus that adds of described alternating temperature pressure-swing absorption apparatus includes being arranged on the spiral shell of adsorption tanks intracoelomic cavity
Rotation shape rustless steel inner coil pipe, the sidewall of absorption tank body is provided with first interface and the second interface；This inner coil pipe entrance point is through the
One interface enters the outlet of valve 501 and is connected with steam, and this inner coil pipe port of export goes out entering of valve 502 through the second interface with steam
Mouth connects.
Described adsorption tanks as in figure 2 it is shown, adsorption tanks include gas outlet 601, charging door 602, absorption tank body 603,
Rustless steel inner coil pipe 604, high heat transfer special-purpose activated charcoal 605, temperature point 606, discharge port 607, air inlet 608,
Inner coil pipe import 609, inner coil pipe outlet 610, in described adsorption tanks, high heat transfer activated carbon 605 is special-purpose activated charcoal, its
Thermal conductivity is more than 6 times that 0.6W/ (m k), i.e. capacity of heat transmission are normal activated carbon, and benzene adsorptive value is more than 40.
Alternating temperature pressure-swing absorption apparatus of the present invention is not limited in one group, can be more than two, according to reality
Needs are adjusted.
Embodiment 2: essentially identical with the structure of embodiment 1, something in common is not repeated, except for the difference that:
Being arranged side by side first in described ice chest heat exchanger 105 to change greenhouse and second and change greenhouse, described first changes greenhouse includes gas
Road import, gas circuit outlet, the second inlet channel of parallel longitudinal setting and the second return gas channel；Second changes greenhouse includes indulging
To the 3rd inlet channel be arrangeding in parallel and the 3rd return gas channel；Described liquid passage inlet successively with the second inlet channel, the 3rd
Inlet channel, the 3rd return gas channel, the second return gas channel, gas circuit outlet constitute heat exchanger channels；Described first changes temperature
Room, second change that greenhouse bottom is all corresponding has the liquid outlet connected with heat exchanger channels, at described each liquid outlet, be equipped with switch
Valve.
Described first changes greenhouse also includes first refrigerant line parallel with the second inlet channel, the second return gas channel；
Described second changes greenhouse also includes the second refrigerant pipeline parallel with the 3rd inlet channel, the 3rd return gas channel；Described joint
Fluid element includes low temperature field restricting element 103, pre-awkward silence at a meeting restricting element 104；The import of the first refrigerant line is by pre-
Awkward silence at a meeting restricting element 104 connects with condensing heat exchanger 102, and evaporating pressure regulating valve is passed through in the outlet of the first refrigerant line
106 connect with gas-liquid separator 107；The import of described second refrigerant pipeline passes through low temperature field restricting element 103 with cold
Solidifying heat exchanger 102 connects, and the outlet of second refrigerant pipeline connects with gas-liquid separator 107.
Embodiment 3: the recovery method of the absorbing recovery device of described acrylonitrile gas, comprises the following steps:
1. condensation at low temperature step: include the first condensation at low temperature step and the second condensation at low temperature step:
First condensation at low temperature step:
Acrylonitrile gas is sent in ice chest heat exchanger by Recuperative heat exchanger by frequency conversion air pump, through the circulating cooling of condensing circuit,
Acrylonitrile gas is made to condense in ice chest heat exchanger, through the switching of three-way switch valve, the low temperature third after condensation process
Alkene nitrile gas is directly entered liquid-proof spray cans；
Second condensation at low temperature step: acrylonitrile gas is sent in ice chest heat exchanger by Recuperative heat exchanger by frequency conversion air pump, through supercool
The circulating cooling in solidifying loop, makes acrylonitrile gas condense in ice chest heat exchanger, through the switching of three-way switch valve,
Low temperature acrylonitrile gas backstreaming after condensation process, to Recuperative heat exchanger, is handed over the acrylonitrile air heat entering Recuperative heat exchanger
While swap-in row warming up treatment, the acrylonitrile gas entering Recuperative heat exchanger is carried out pre-cooling, the propylene after warming up treatment
Nitrile gas enters liquid-proof spray cans；Pre-cooling and the condensation of ice chest heat exchanger, the third of about 90%～98% in Recuperative heat exchanger
Alkene nitrile gas is cooled to liquid, the liquid outlet of the leakage fluid dram of Recuperative heat exchanger, ice chest exchanger base reclaim；
2. adsorption treatment step, including the first adsorption treatment step and the second adsorption treatment step:
First adsorption treatment step: the low temperature acrylonitrile gas after the first condensation at low temperature step condensation process is led to adsorption tanks, inhales
While low temperature acrylonitrile gas absorption after condensation process is processed by attached tank internal adsorption agent, carry out cold and hot exchange and make adsorbent
Cooling, cooling enters the second adsorption treatment step after terminating, the valve of switching three-way switching simultaneously enters the second condensation at low temperature step；
Second adsorption treatment step: the acrylonitrile gas after the second condensation at low temperature step warming up treatment is input to inhale by liquid-proof spray cans
Carrying out adsorption treatment in attached tank, the gas after adsorption treatment is drained in air；
3. activating and regenerating step, including:
To step 2. in the inner coil pipe adsorbed in saturated adsorption tanks after the second adsorption treatment step is passed through steam pair
Adsorbent carries out adding Thermal desorption, by absorption acrylonitrile desorbing gas in adsorbent step out；And
Open anti-explosion vacuum pump to adsorption tanks evacuation, then open air bleeding valve and introduce gas and carry out back pressure, enter at the first absorption
Reason step；
4. recycle step: by step 3. in desorption that adsorption tanks evacuation is obtained acrylonitrile gas out, transport is to becoming
The entrance of the frequency conversion air pump of temperature front end, pressure-variable adsorption loop, enters next first or second condensation at low temperature step.
Acrylonitrile gas after the warming up treatment that second condensation at low temperature step obtains enters adsorption tanks through intake valve, profit
With being placed on the adsorbent selectivity to adsorbate of adsorption tanks inner chamber, i.e. each component in acrylonitrile gas and air Mixture
And the difference that between activated carbon, adhesion is strong and weak, makes the constituent of air of difficult absorption divide with the acrylonitrile gas component of easily absorption
From, after having adsorbed, close the intake valve that is connected with the air inlet bottom adsorption tanks, open and the giving vent to anger of adsorption tanks top
The air bleeding valve that mouth is connected, is discharged gas remaining after absorption by high-altitude cylinder.
Close air bleeding valve, enter activating and regenerating step, utilize molecular activity with temperature raise and strengthen characteristic,
Opening steam and enter valve and steam goes out valve, saturated vapor is by adsorbing in saturated adsorption tanks after the second adsorption treatment step
The entrance point of inner coil pipe enter indirectly high heat transfer special-purpose activated charcoal added in inner coil pipe Thermal desorption, will absorption in activity
Acrylonitrile desorbing gas in charcoal micropore is out；Heating simultaneously, is opened parsing valve and anti-explosion vacuum pump, is carried out evacuation,
And the gas of extraction is sent to the arrival end of frequency conversion air pump, enter next first or second condensation at low temperature step, make suction
Attached dose obtains regeneration, and saturated vapor goes out valve by steam and discharges.After being parsed, close and resolve valve, open air bleeding valve and draw
Entering gas and carry out back pressure, the valve of switching three-way switching subsequently is passed through the condensation obtained through the first condensation at low temperature step in adsorption tanks
Low temperature acrylonitrile gas after process, adsorption tanks internal adsorption agent is to the low temperature acrylonitrile gas absorption after condensation process and carries out
Cold and hot exchange, makes adsorbent cool down, and cooling opens air bleeding valve after terminating, and the gas after adsorption treatment is drained in air,
Subsequently entering the second adsorption treatment step, the valve of switching three-way switching simultaneously enters the second condensation at low temperature step.
When the intake valve that closedown is connected with the air inlet bottom adsorption tanks, when opening parsing valve, owing to intake valve cuts out,
Desorption acrylonitrile gas out cannot be introduced in adsorption tanks, and now this portion gas can be buffered in pipeline, ice chest heat exchange
In device and liquid-proof spray cans, wait and enter adsorption tanks.
Desorption acrylonitrile gas caching out is not limited in pipeline, ice chest heat exchanger and liquid-proof spray cans, also
An air accumulator can be set between anti-explosion vacuum pump and frequency conversion air pump for caching.
The main operational principle of the present invention is: in the present invention, by explosion-proof refrigeration compressor 101 during condensing circuit work
The high-temperature high-pressure refrigerant gas discharged enters condensing heat exchanger 102 and is condensed into high-pressure sub-cooled liquid, drops through restricting element
Buckling becomes the vehicle repair major mixture of low-temp low-pressure to enter ice chest heat exchanger 105, and the vehicle repair major mixture of low-temp low-pressure exists
Evaporate in ice chest heat exchanger 105 and absorb the heat by the acrylonitrile gas in ice chest heat exchanger 105, flowing through ice chest
The liquefaction of being lowered the temperature such as the acrylonitrile vapors of heat exchanger 105, steam, cold-producing medium passes through gas-liquid separator after fully vaporizing
107 are compressed entrance next round by explosion-proof refrigeration compressor 101 again circulates.
The treatment temperature of Recuperative heat exchanger is about 22～28 DEG C；Wherein ice chest heat exchanger 105 has two to change greenhouse, described
First treatment temperature changing greenhouse is about 1～7 DEG C, and the second treatment temperature changing greenhouse is about-43～-37 DEG C.Acrylonitrile gas
Enter first by Recuperative heat exchanger 108 through ice chest heat exchanger 105 and change greenhouse, with the outflow of pre-awkward silence at a meeting restricting element 104
The cold and hot exchange of cold-producing medium carries out condensation process simultaneously, makes the temperature of gas reduce to about 1～7 DEG C, is then passed through the 3rd air inlet and leads to
Road enters second and changes greenhouse, and the cold and hot exchange of cold-producing medium flowed out with low temperature field restricting element 103 carries out condensation process simultaneously,
The temperature making gas reduces to about-43～-37 DEG C；The most about-43～the residual gas of-37 DEG C sequentially pass through again second change greenhouse,
First changes the low temperature acrylonitrile gas entrance Recuperative heat exchanger after the condensation process being about 7～13 DEG C after rising again in greenhouse
108, this portion gas and the acrylonitrile gas entering Recuperative heat exchanger 108 through the first inlet channel carry out cold and hot exchange,
Enter first after making acrylonitrile gas cooling first pre-cooling condensation process simultaneously and change greenhouse；Residual gas then absorbs heat after rising again and becomes
About 22～28 DEG C of gases enter liquid-proof spray cans.Acrylonitrile gas, through Recuperative heat exchanger 108, enters ice chest heat exchanger 105
In, change greenhouse through two, thus reach the purpose of acrylonitrile gas continuous cooling to about-40 DEG C.According to acrylonitrile
The concrete composition of gas, temperature can adjust in good time.Cold through the pre-cooling of Recuperative heat exchanger 108 and ice chest heat exchanger 105
Solidifying, the acrylonitrile gas of 90%～about 98% is cooled to liquid, by the leakage fluid dram of Recuperative heat exchanger 108, ice chest heat exchange
Liquid outlet bottom device 105 reclaims.
Described low temperature field restricting element 103 changes greenhouse temperature for regulation second；Pre-awkward silence at a meeting restricting element 104 is used for
Greenhouse temperature is changed in regulation first；Evaporating pressure regulating valve 106 is used for stablizing first and changes greenhouse temperature and outlet evaporating pressure.
First change greenhouse, the second temperature changing greenhouse reduces successively.Comparing second and change greenhouse, first changes greenhouse temperature its system higher
Refrigerant circuit pressure is relatively big, and the present invention by changing the evaporating pressure regulating valve that first refrigerant line in greenhouse is connected with first
106 adjust evaporating pressure stabilisation systems.Changing greenhouse simultaneously for first, the present invention is by pre-awkward silence at a meeting restricting element
104 pairs of cold-producing mediums are controlled regulating first and change greenhouse temperature, and can be changed by evaporating pressure regulating valve 106 further
Variable refrigerant pressure realizes the first precise fine-adjustment changing greenhouse temperature.
Acrylonitrile gas after warming up treatment carries out adsorption treatment in intake valve enters adsorption tanks；When adsorbent is inhaled
Attached saturated after be passed through steam heating, heating simultaneously, opens the anti-explosion vacuum pump 301 being connected with adsorption tanks bottom air inlet,
Carrying out evacuation, then back pressure the low temperature acrylonitrile gas after being passed through condensation process in adsorption tanks, make adsorbent cool down,
Start new adsorption treatment.The gas of evacuation extraction is sent to the entrance of frequency conversion air pump 201, enters at next round recovery
Reason.
Although as it has been described above, represented and described the present invention with reference to specific preferred embodiment, but it must not solve
It is interpreted as the restriction to the present invention self.Under the spirit and scope of the present invention premise defined without departing from claims,
Can various changes can be made in the form and details to it.
Claims (8)
1. the absorbing recovery device of an acrylonitrile gas, it is characterised in that: include condensing circuit, alternating temperature pressure-variable adsorption
Loop, described condensing circuit includes the explosion-proof refrigeration compressor (101) sequentially connected, condensing heat exchanger (102), throttles
Element, ice chest heat exchanger (105), gas-liquid separator (107), described gas-liquid separator (107) and explosion-proof refrigeration pressure
Contracting machine (101) connects；Described ice chest heat exchanger (105) bottom offers liquid outlet；
Alternating temperature pressure-variable adsorption loop include frequency conversion air pump (201), Recuperative heat exchanger (108), three-way switch valve (109),
Ice chest heat exchanger (105), liquid-proof spray cans (203), alternating temperature pressure-swing absorption apparatus, anti-explosion vacuum pump (301)；Alternating temperature becomes
Pressure adsorbent equipment includes adsorption tanks (302), intake valve (401), resolves valve (402), air bleeding valve (403), described
Adsorption tanks include adsorbing tank body, the adsorbent being placed on adsorption tanks intracoelomic cavity and make adsorbent reactivation add thermal analysis apparatus；
The entrance of frequency conversion air pump (201) is connected with oil gas entrance by the second spark arrester, and the outlet of frequency conversion air pump (201) is passed through
First spark arrester (202) is connected with the import of Recuperative heat exchanger (108) first inlet channel, going out of the first inlet channel
Mouth is connected with the liquid passage inlet of ice chest heat exchanger (105), the gas circuit outlet of ice chest heat exchanger (105) and three-way switch valve
(109) import is connected, and the first outlet of three-way switch valve (109) and the first return-air of Recuperative heat exchanger (108) lead to
The import in road is connected, and the outlet of the first return gas channel is connected with liquid-proof spray cans (203) entrance, three-way switch valve (109)
Second outlet be also connected with liquid-proof spray cans (203) entrance, liquid-proof spray cans (203) outlet by intake valve (401)
It is connected with the air inlet of absorption tank base, connects between air inlet and intake valve (401) outlet of absorption tank base
There is the import of parsing valve (402), resolve the outlet of valve (402) by anti-explosion vacuum pump (301) and frequency conversion air pump (201)
Entrance connect；The leakage fluid dram connected with the first inlet channel is offered in described Recuperative heat exchanger (108) bottom；
The gas outlet on described absorption tank body top is connected with high-altitude cylinder (303) by air bleeding valve (403), the 3rd spark arrester.
The absorbing recovery device of acrylonitrile gas the most according to claim 1, it is characterised in that: described alternating temperature becomes
The thermal analysis apparatus that adds of pressure adsorbent equipment includes being arranged on the inner coil pipe of adsorption tanks intracoelomic cavity, and the sidewall of absorption tank body is provided with the
One interface and the second interface；The outlet that this inner coil pipe entrance point enters valve (501) through first interface with steam is connected, should
The import that the inner coil pipe port of export goes out valve (502) through the second interface with steam is connected.
The absorbing recovery device of acrylonitrile gas the most according to claim 2, it is characterised in that: described inner coil pipe
For helical form rustless steel inner coil pipe.
The absorbing recovery device of acrylonitrile gas the most according to claim 1, it is characterised in that: described ice chest
Be arranged side by side first in heat exchanger (105) to change greenhouse and second and change greenhouse, described first change greenhouse include liquid passage inlet,
Gas circuit outlet, the second inlet channel of parallel longitudinal setting and the second return gas channel；Second changes greenhouse includes parallel longitudinal setting
The 3rd inlet channel put and the 3rd return gas channel；Described liquid passage inlet successively with the second inlet channel, the 3rd inlet channel,
3rd return gas channel, the second return gas channel, gas circuit outlet constitute heat exchanger channels；Described liquid outlet correspondence respectively is offered
First changing greenhouse, second changing greenhouse bottom, described each liquid outlet all connects with heat exchanger channels.
The absorbing recovery device of acrylonitrile gas the most according to claim 4, it is characterised in that: described first changes
Greenhouse also includes first refrigerant line parallel with the second inlet channel, the second return gas channel；Described second changes greenhouse also
Including the second refrigerant pipeline parallel with the 3rd inlet channel, the 3rd return gas channel；Described restricting element includes low temperature field
Restricting element (103), pre-awkward silence at a meeting restricting element (104)；The import of the first refrigerant line is by pre-awkward silence at a meeting restricting element
(104) connecting with condensing heat exchanger (102), the outlet of the first refrigerant line is by evaporating pressure regulating valve (106)
Connect with gas-liquid separator (107)；The import of described second refrigerant pipeline by low temperature field restricting element (103) with
Condensing heat exchanger (102) connects, and the outlet of second refrigerant pipeline connects with gas-liquid separator (107).
The absorbing recovery device of acrylonitrile gas the most according to claim 4, it is characterised in that: described respectively go out liquid
Switch valve it is equipped with at Kou.
7. being used for the recovery method of the absorbing recovery device of the arbitrary described acrylonitrile gas of claim 1-6, its feature exists
In: comprise the following steps:
1. condensation at low temperature step: include the first condensation at low temperature step and the second condensation at low temperature step:
First condensation at low temperature step:
Acrylonitrile gas is sent in ice chest heat exchanger (105) by Recuperative heat exchanger (108) by frequency conversion air pump (201),
Through the circulating cooling of condensing circuit, acrylonitrile gas is made to condense, through threeway in ice chest heat exchanger (105)
The switching of switching valve, the low temperature acrylonitrile gas after condensation process is directly entered liquid-proof spray cans (203)；
Second condensation at low temperature step: acrylonitrile gas is sent into cold by Recuperative heat exchanger (108) by frequency conversion air pump (201)
In case heat exchanger (105), through the circulating cooling of condensing circuit, make acrylonitrile gas in ice chest heat exchanger (105)
Condensing, through the switching of three-way switch valve, the low temperature acrylonitrile gas backstreaming after condensation process is to Recuperative heat exchanger
(108), while carrying out warming up treatment with the acrylonitrile air heat exchange entering Recuperative heat exchanger (108), to entrance
The acrylonitrile gas of Recuperative heat exchanger (108) carries out pre-cooling, and the acrylonitrile gas after warming up treatment enters liquid-proof spray cans；
Pre-cooling and the condensation of ice chest heat exchanger (105), the acrylonitrile gas of 90%～98% in Recuperative heat exchanger (108)
It is cooled to liquid, the liquid outlet of the leakage fluid dram of Recuperative heat exchanger (108), ice chest heat exchanger (105) bottom reclaims；
2. adsorption treatment step, including the first adsorption treatment step and the second adsorption treatment step:
First adsorption treatment step: the low temperature acrylonitrile gas after the first condensation at low temperature step condensation process is sprayed through liquid-proof
Tank leads to adsorption tanks, while the low temperature acrylonitrile gas absorption after condensation process is processed by adsorption tanks internal adsorption agent, carries out
Cold and hot exchange makes adsorbent cool down, and cooling enters the second adsorption treatment step after terminating, and the valve of switching three-way switching simultaneously enters
Second condensation at low temperature step；
Second adsorption treatment step: the acrylonitrile gas after the second condensation at low temperature step warming up treatment passes through liquid-proof spray cans
(203) being input in adsorption tanks carry out adsorption treatment, the gas after adsorption treatment is drained in air；
3. activating and regenerating step, including:
To step 2. in the inner coil pipe adsorbed in saturated adsorption tanks after the second adsorption treatment step is passed through steaming
Vapour adds Thermal desorption to adsorbent, by absorption acrylonitrile desorbing gas in adsorbent step out；And
Open anti-explosion vacuum pump (301) to adsorption tanks evacuation, then open air bleeding valve and carry out back pressure, enter the first suction
Attached process step；
4. recycle step: by step 3. in desorption that adsorption tanks evacuation is obtained acrylonitrile gas out, transport
To the entrance of frequency conversion air pump (201), enter next first or second condensation at low temperature step.
It is used for the recovery method of the absorbing recovery device of acrylonitrile gas the most according to claim 7, it is characterised in that:
The 1. described acrylonitrile gas of step is entered in ice chest heat exchanger (105) by Recuperative heat exchanger (108), sequentially passes through
In ice chest heat exchanger (105) first is changed greenhouse, second changes greenhouse and the cold and hot exchange of cold-producing medium and carry out condensation process simultaneously,
Finally give the acrylonitrile gas of-43～-37 DEG C；Then-43～the acrylonitrile gas of-37 DEG C sequentially pass through second change greenhouse,
First changes greenhouse carries out warming up treatment, forms the low temperature acrylonitrile gas after condensation process；First treatment temperature changing greenhouse
Being 1～7 DEG C, second changes the treatment temperature in greenhouse for-43～-37 DEG C.
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| CN111036030B (en) * | 2018-07-09 | 2022-04-12 | 上海深城环保设备工程有限公司 | Gas adsorption separation device |
| CN109126181A (en) * | 2018-10-22 | 2019-01-04 | 南京都乐制冷设备有限公司 | A kind of methanol gas recovering device and recovery method |
| CN109999723B (en) * | 2019-04-18 | 2021-05-04 | 中国科学院山西煤炭化学研究所 | Acrylonitrile raw material feeding system |
| CN112439296A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | Low-temperature circulation process for bottom of absorption tower of acrylonitrile device |
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Denomination of invention: An adsorption recovery device and recovery method of acrylonitrile gas Effective date of registration: 20210917 Granted publication date: 20160921 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. yongyang sub branch Pledgor: NANJING ALL DELIGHT REFRIGERATION EQUIPMENT Co.,Ltd. Registration number: Y2021980009516 |
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Date of cancellation: 20220923 Granted publication date: 20160921 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. yongyang sub branch Pledgor: NANJING ALL DELIGHT REFRIGERATION EQUIPMENT Co.,Ltd. Registration number: Y2021980009516 |