CN204723980U - A kind of retracting device of acrylonitrile gas - Google Patents
A kind of retracting device of acrylonitrile gas Download PDFInfo
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- CN204723980U CN204723980U CN201520365990.9U CN201520365990U CN204723980U CN 204723980 U CN204723980 U CN 204723980U CN 201520365990 U CN201520365990 U CN 201520365990U CN 204723980 U CN204723980 U CN 204723980U
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Abstract
The utility model discloses a kind of retracting device of acrylonitrile gas, comprise condensing circuit and alternating temperature pressure-variable adsorption loop, described condensing circuit comprises ice chest heat exchanger, refrigeration compressor, restricting element, condensing heat exchanger, gas-liquid separator, and described alternating temperature pressure-variable adsorption loop comprises frequency conversion air pump, Recuperative heat exchanger, three-way switch valve, ice chest heat exchanger, liquid-proof sprinkling irrigation, alternating temperature pressure-swing absorption apparatus, vavuum pump; The utility model is reclaimed by condensation, alternating temperature pressure-variable adsorption loop and is purified acrylonitrile gas, and final acrylonitrile gas concentration reaches milligram level, and stops the generation secondary pollution that unit is in operation.
Description
Technical field
The utility model relates to a kind of retracting device of gas, be specifically related to a kind of retracting device of acrylonitrile gas.
Background technology
Because acrylonitrile volatile organic matter is very easy to volatilization in the processes such as production, storage, transport, sale, use, thus produce very serious acrylonitrile gas fixed discharge source, not only cause resources loss, more constitute potential fire hazard, simultaneously poisonous acrylonitrile gas severe contamination environment, harm worker's is healthy.
So far, the acrylonitrile that place market not yet having ripe met petrochemical plant, depots and transfer storage facility etc. to there is the discharge of acrylonitrile gaseous volatilization uses reclaims and does not produce secondary pollution and the device of energy qualified discharge.
Summary of the invention
Utility model object: in order to overcome the deficiencies in the prior art, the continuous coo1ing fractional condensation that first object of the present utility model is to provide and a kind ofly utilizes condensation, alternating temperature pressure swing adsorption realizes acrylonitrile gas is reclaimed and the retracting device of qualified discharge; Second object is to provide a kind of device not needing cooling water just can realize adsorbent cooling.
Technical scheme: in order to solve the problems of the technologies described above, the utility model provides a kind of retracting device of acrylonitrile gas, comprise condensing circuit, alternating temperature pressure-variable adsorption loop, described condensing circuit comprises the refrigeration compressor, condensing heat exchanger, restricting element, ice chest heat exchanger, the gas-liquid separator that sequentially connect, and described gas-liquid separator is connected with refrigeration compressor; Described ice chest exchanger base offers liquid outlet;
Alternating temperature pressure-variable adsorption loop comprises 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, vavuum pump more than two, that often organizes alternating temperature pressure-swing absorption apparatus and comprise adsorption tanks, intake valve, parsing valve, air bleeding valve, described adsorption tanks comprise absorption tank body, is placed on the adsorbent of adsorption tanks intracoelomic cavity and makes adsorbent reactivation adds thermal analysis apparatus, described oil gas entrance is connected with the entrance of frequency conversion air pump, frequency conversion wind delivery side of pump is connected with the import of Recuperative heat exchanger first inlet channel, the outlet of the first inlet channel is connected with the liquid passage inlet of ice chest heat exchanger, the gas circuit outlet of ice chest heat exchanger is connected with three-way switch valve import, first outlet of three-way switch valve is connected with the import of the first return gas channel of Recuperative heat exchanger, the outlet of the first return gas channel is connected with liquid-proof spray cans entrance, second outlet of three-way switch valve is also connected with liquid-proof spray cans entrance, the outlet of liquid-proof spray cans is connected by the air inlet of intake valve with absorption tank base, the import of resolving valve is connected with between the air inlet of absorption tank base and intake valve outlet, the outlet of resolving valve is connected by the entrance of vavuum pump with frequency conversion air pump, the leakage fluid dram be communicated with the first inlet channel is offered bottom described Recuperative heat exchanger,
The gas outlet on described absorption tank body top is connected with high-altitude cylinder by air bleeding valve, is also connected with the outlet of back-pressure valve between the gas outlet and the air inlet of air bleeding valve of absorption tank body.
As preferably, the thermal analysis apparatus that adds of described alternating temperature pressure-swing absorption apparatus comprises the helical form stainless steel inner coil pipe being arranged on adsorption tanks intracoelomic cavity, and the sidewall of absorption tank body is provided with first interface and the second interface; This inner coil pipe entrance point is connected with the outlet that steam enters valve through first interface, and this inner coil pipe port of export goes out valve import through the second interface with steam and is connected.
As preferably, between the import of the first inlet channel of described frequency conversion wind delivery side of pump and Recuperative heat exchanger, be connected with the first spark arrester; The second spark arrester is connected with between described oil gas entrance and the entrance of frequency conversion air pump; The 3rd spark arrester is also connected with between described air bleeding valve and high-altitude cylinder.
As preferably, described alternating temperature pressure-variable adsorption loop comprise 2 groups be arranged in parallel alternately for adsorbing the alternating temperature pressure-swing absorption apparatus with dissection process;
Described two groups of alternating temperature pressure-swing absorption apparatus comprise adsorption tanks A, adsorption tanks B, intake valve A, intake valve B, resolve valve A, resolve valve B, air bleeding valve A, air bleeding valve B, back-pressure valve;
Liquid-proof spray cans is connected with the air inlet bottom adsorption tanks A by intake valve A; Be connected with the import of resolving valve A between air inlet bottom adsorption tanks A and intake valve A export, the outlet of resolving valve A is connected with vavuum pump; The gas outlet on described adsorption tanks A top is connected with high-altitude cylinder by air bleeding valve A, is also connected with the outlet of back-pressure valve between the gas outlet on described adsorption tanks A top and air bleeding valve A air inlet; The inner coil pipe entrance point of described adsorption tanks A inner chamber is connected with the outlet that steam enters valve A; The inner coil pipe port of export and the steam of adsorption tanks A go out valve A import and are connected;
Liquid-proof spray cans is connected with the air inlet bottom adsorption tanks B by intake valve B; Be connected with the import of resolving valve B between air inlet bottom adsorption tanks B and intake valve B export, the outlet of resolving valve B is connected with vavuum pump; The gas outlet on described adsorption tanks B top is connected with high-altitude cylinder by air bleeding valve B, is also connected with the outlet of back-pressure valve between the gas outlet on described adsorption tanks B top and air bleeding valve B air inlet; The inner coil pipe entrance point of described adsorption tanks B inner chamber is connected with the outlet that steam enters valve B; The inner coil pipe port of export and the steam of adsorption tanks B go out valve B import and are connected.
As preferably, be arranged side by side first and change greenhouse and second and change greenhouse in described ice chest heat exchanger, described first changes greenhouse comprises liquid passage inlet, gas circuit outlet, the second inlet channel of parallel longitudinal setting and the second return gas channel; Second changes the 3rd inlet channel and the 3rd return gas channel that greenhouse comprises parallel longitudinal setting; Described liquid passage inlet forms heat exchanger channels with the second inlet channel, the 3rd inlet channel, the 3rd return gas channel, the second return gas channel, gas circuit outlet successively; Described first changes greenhouse, second changes the equal correspondence of greenhouse bottom and has the liquid outlet be communicated with heat exchanger channels.
As preferably, described first changes greenhouse also comprises first refrigerant line parallel with the second inlet channel, the second return gas channel; Described second changes greenhouse also comprises the second refrigerant pipeline parallel with the 3rd inlet channel, the 3rd return gas channel; Described restricting element comprises low temperature field restricting element, pre-awkward silence at a meeting restricting element; The import of the first refrigerant line is communicated with condensing heat exchanger by pre-awkward silence at a meeting restricting element, and the outlet of the first refrigerant line is communicated with gas-liquid separator by evaporating pressure regulating valve; The import of described second refrigerant pipeline is communicated with condensing heat exchanger by low temperature field restricting element, and the outlet of second refrigerant pipeline is communicated with gas-liquid separator.
As preferably, described each liquid outlet place is equipped with switch valve.
Described low temperature field restricting element changes greenhouse temperature for regulating second; Pre-awkward silence at a meeting restricting element changes greenhouse temperature for regulating first; Evaporating pressure regulating valve is used for stablizing first and changes greenhouse temperature and outlet evaporating pressure.
The high-temperature high-pressure refrigerant gas that condensing circuit described in the utility model is produced by refrigeration compressor, be condensed into after high-pressure sub-cooled liquid through condensing heat exchanger, be transported in ice chest heat exchanger through restricting element again, cold-producing medium evaporation absorbs the heat vaporization of acrylonitrile gas, acrylonitrile gas is lowered the temperature and liquefies.
Inner coil pipe is spiral helicine stainless steel pipes, during parsing, saturated vapor enters valve by steam and enters into inner coil pipe, Convective Heating adsorbing medium, realize the parsing regeneration of adsorbent, the acrylonitrile gas obtained after resolving is through vavuum pump vacuum drawn, enter the entrance of the frequency conversion air pump of front end, alternating temperature pressure-variable adsorption loop, enter and reclaim circulation next time.
Beneficial effect: (1) the utility model is reclaimed by condensing circuit, alternating temperature pressure-variable adsorption loop and purified acrylonitrile gas, final acrylonitrile gas concentration reaches the requirement that GB or terrestrial reference specify, complete qualified discharge; (2) alternating temperature pressure-swing absorption apparatus of the present utility model is more than two groups, can carry out absorption and the parsing of acrylonitrile gas simultaneously, increase work efficiency; (3) employing three-way switch valve of the present utility model and Recuperative heat exchanger, can make the low temperature acrylonitrile gas after condensation process directly enter adsorption tanks and cool the adsorbent completing parsing, makes adsorbent recover normal temperature; The restriction that the scene of solving does not have cold water to provide, and utilize low temperature acrylonitrile gas to cool, speed is faster, has simplified desorption system link simultaneously, has added reliability; (4) the acrylonitrile gas that the parsing of the utility model adsorbent is deviate from extracts through vavuum pump, enters the entrance of frequency conversion air pump, enters and reclaim circulation next time, reduce exhaust emission; (5) the utility model compact conformation, floor space is little, and unit according to presetting fully automatic operation, can be supervised without the need to special messenger after connecting; (6) further, in the utility model adsorption tanks, adsorbent acrylonitrile gas passes into saturated vapor by inner coil pipe and adds thermal desorption out, makes adsorbent again possess activity, and has stopped the secondary pollution that unit is in operation; (7) be provided with in the utility model ice chest heat exchanger and different change greenhouse, gradual change cooling can be carried out to acrylonitrile gas, reduce frost, be more conducive to the liquefaction of acrylonitrile gas, and warming up treatment can be carried out to gas, enter sorption cycle.
Accompanying drawing explanation
Fig. 1 is the retracting device structural representation of acrylonitrile gas described in the utility model;
Fig. 2 is the retracting device structural representation comprising the acrylonitrile gas of spark arrester described in the utility model;
Fig. 3 is adsorption tanks structural representation described in the utility model.
In Fig. 1-2, 101-refrigeration compressor, 102-condensing heat exchanger, 103-low temperature field restricting element, the pre-awkward silence at a meeting restricting element of 104-, 105-ice chest heat exchanger, 106-evaporating pressure regulating valve, 107-gas-liquid separator, 108-Recuperative heat exchanger, 109-three-way switch valve, 201-frequency conversion air pump, 202-first spark arrester, 203-liquid-proof spray cans, 301-vavuum pump, 302-adsorption tanks A, 303-adsorption tanks B, 304-high-altitude cylinder, 401-intake valve A, 402-intake valve B, 403-resolves valve A, 404-resolves valve B, 405-air bleeding valve A, 406-air bleeding valve B, 407-back-pressure valve, 501-steam enters valve A, 502-steam enters valve B, 503-steam goes out valve A, 504-steam goes out valve B.
In Fig. 3,601-gas outlet, 602-charging door, 603-adsorb tank body, 604-inner coil pipe, 605-high heat transfer special-purpose activated charcoal, 606-temperature point, 607-discharge port, 608-air inlet, the import of 609-inner coil pipe, the outlet of 610-inner coil pipe.
Detailed description of the invention
Below by accompanying drawing, technical solutions of the utility model are described in detail, but protection domain of the present utility model is not limited to described embodiment.
Embodiment 1: as shown in Figure 1, when alternating temperature pressure-swing absorption apparatus is two groups:
A kind of retracting device of acrylonitrile gas, comprise condensing circuit, alternating temperature pressure-variable adsorption loop, described condensing circuit comprises the refrigeration compressor 101, condensing heat exchanger 102, restricting element, ice chest heat exchanger 105, the gas-liquid separator 107 that sequentially connect, and described gas-liquid separator 107 is connected with refrigeration compressor 101; 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, the outlet of frequency conversion air pump 201 is connected with the import of Recuperative heat exchanger 108 first inlet channel, the outlet of the first inlet channel is connected with the liquid passage inlet of ice chest heat exchanger 105, 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, the outlet of the first return gas channel is connected with liquid-proof spray cans 203 entrance, and the second outlet of three-way switch valve 109 is connected with liquid-proof spray cans 203 entrance;
Liquid-proof spray cans 203 is exported and is connected with the air inlet bottom adsorption tanks A 302 by intake valve A 401; The gas outlet on described adsorption tanks A 302 top is connected with high-altitude cylinder 304 by air bleeding valve A 405, is also connected with the outlet of back-pressure valve 407 between the gas outlet on described adsorption tanks A 302 top and air bleeding valve A air inlet; Stainless steel inner coil pipe entrance point and the steam of described adsorption tanks A 302 enter valve A 501 and export and be connected; The stainless steel inner coil pipe port of export and the steam of adsorption tanks A 302 go out valve A 503 import and are connected; Be connected with the import of resolving valve A 403 between air inlet bottom adsorption tanks A 302 and intake valve A 401 export, the outlet of resolving valve A 403 is connected with vavuum pump 301;
Liquid-proof spray cans 203 is exported and is connected with the air inlet bottom adsorption tanks B 303 by intake valve B 402; The gas outlet on described adsorption tanks B 303 top is connected with high-altitude cylinder 304 by air bleeding valve B 406, is also connected with the outlet of back-pressure valve 407 between the gas outlet on described adsorption tanks B 303 top and air bleeding valve B 406 air inlet; Stainless steel inner coil pipe entrance point and the steam of described adsorption tanks B 303 enter valve B 502 and export and be connected; The stainless steel inner coil pipe port of export and the steam of adsorption tanks B 303 go out valve B 504 import and are connected; Be connected with the import of resolving valve B404 between air inlet bottom adsorption tanks B 303 and intake valve B 402 export, the outlet of resolving valve B 404 is connected with vavuum pump 301;
Vavuum pump 301 is connected with the entrance of frequency conversion air pump 201; The leakage fluid dram be communicated with the first inlet channel is offered bottom described Recuperative heat exchanger 108.
As shown in Fig. 2, between the import of the outlet of described frequency conversion air pump 201 and the first inlet channel of Recuperative heat exchanger 108, be connected with the first spark arrester; The second spark arrester is connected with between described oil gas entrance and the entrance of frequency conversion air pump 201; The 3rd spark arrester is also connected with between described air bleeding valve and high-altitude cylinder 304.
Adsorption tanks described in the utility model comprise absorption tank body, be placed on the adsorbent in adsorption tanks intracoelomic cavity and make adsorbent reactivation add thermal analysis apparatus, the described effect adding thermal analysis apparatus heats adsorbent the gas be adsorbed in adsorbent is parsed, the thermal analysis apparatus that adds described in the utility model is preferably spiral helicine stainless steel inner coil pipe, utilizes and passes into the agent of saturated vapor heating adsorption.Described adsorption tanks are two groups, as shown in Figure 3, adsorption tanks comprise gas outlet 601, charging door 602, absorption tank body 603, stainless 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 active carbon 605 is special-purpose activated charcoal, its thermal conductivity is greater than 0.6W/ (mk), namely capacity of heat transmission is 6 times of normal activated carbon, and benzene adsorptive value is greater than 40.
In order to strengthen adsorption effect, the utility model adopts two groups of alternating temperature pressure-swing absorption apparatus alternate treatment, and two groups of alternating temperature pressure-swing absorption apparatus comprise the adsorption tanks of two alternating sorbent and parsing.When adsorption tanks are in adsorbed state, another adsorption tanks are in parse state.When the amount of adsorbs propylene nitrile gas reaches certain value (close to saturated) in adsorption tanks, carry out absorption and resolving switching.Resolving adopts the inner coil pipe be built in adsorption tanks to be heated by saturated vapor, along with the rising of adsorbent temperature, saturated extent of adsorption reduces, thus acrylonitrile gas is deviate from, the acrylonitrile gas deviate from is through vavuum pump vacuum drawn, enter the entrance of the frequency conversion air pump of front end, alternating temperature pressure-variable adsorption loop, enter and recycle next time.Adsorption tanks are cylindrical steel containers, and regeneration heating inner coil pipe is equipped with in inside, is provided with adsorbing medium therebetween.Adopt the adsorbents such as active carbon, silica gel, zeolite, carbon molecular sieve, the combination of multiple adsorbent can be adopted.What the utility model adopted is high heat transfer special-purpose activated charcoal.
Alternating temperature pressure-swing absorption apparatus of the present utility model is not limited in two groups of alternating temperature pressure-swing absorption apparatus in above-described embodiment, can also be more than 3 groups or 3 groups, and wherein partly can carry out adsorption treatment, another part carries out dissection process.When for 3 groups of alternating temperature pressure-swing absorption apparatus, one group can be used for dissection process, and all the other two groups can be used for adsorption treatment.Absorption and dissection process hocket.
Embodiment 2: substantially identical with the structure of embodiment 1, something in common is not repeated, unlike:
Be arranged side by side first in described ice chest heat exchanger 105 to change greenhouse and second and change greenhouse, described first changes greenhouse comprises liquid passage inlet, gas circuit outlet, the second inlet channel of parallel longitudinal setting and the second return gas channel; Second changes the 3rd inlet channel and the 3rd return gas channel that greenhouse comprises parallel longitudinal setting; Described liquid passage inlet forms heat exchanger channels with the second inlet channel, the 3rd inlet channel, the 3rd return gas channel, the second return gas channel, gas circuit outlet successively; Described liquid outlet respectively correspondence is opened in first and changes greenhouse, second and change greenhouse bottom, and each liquid outlet is all communicated with heat exchanger channels.
Described first changes greenhouse also comprises first refrigerant line parallel with the second inlet channel, the second return gas channel; Described second changes greenhouse also comprises the second refrigerant pipeline parallel with the 3rd inlet channel, the 3rd return gas channel; Described restricting element comprises low temperature field restricting element 103, pre-awkward silence at a meeting restricting element 104; The import of the first refrigerant line is communicated with condensing heat exchanger 102 by pre-awkward silence at a meeting restricting element 104, and the outlet of the first refrigerant line is communicated with gas-liquid separator 107 by evaporating pressure regulating valve 106; The import of described second refrigerant pipeline is communicated with condensing heat exchanger 102 by low temperature field restricting element 103, and the outlet of second refrigerant pipeline is communicated with gas-liquid separator 107.
Described low temperature field restricting element 103 changes greenhouse temperature for regulating second; Pre-awkward silence at a meeting restricting element 104 changes greenhouse temperature for regulating first; Evaporating pressure regulating valve 106 changes greenhouse temperature and outlet evaporating pressure for stablizing first.
Embodiment 3: the recovery method of the retracting device of the acrylonitrile gas described in the utility model embodiment 3, comprises the following steps:
1. cryogenic condensation step: comprise the first cryogenic condensation step and the second cryogenic condensation step:
First cryogenic condensation 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, make acrylonitrile gas carry out condensation in ice chest heat exchanger, through the switching of three-way switch valve, the low temperature acrylonitrile gas after condensation process directly enters liquid-proof sprinkling irrigation;
Second cryogenic condensation 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 carry out condensation in ice chest heat exchanger, through the switching of three-way switch valve, low temperature acrylonitrile gas backstreaming after condensation process is to Recuperative heat exchanger, while exchanging carry out warming up treatment with the acrylonitrile air heat entering Recuperative heat exchanger, carry out precooling to the acrylonitrile gas entering Recuperative heat exchanger, the acrylonitrile gas after warming up treatment enters liquid-proof spray cans; The condensation of pre-cold-peace ice chest heat exchanger in Recuperative heat exchanger, the acrylonitrile gas of about 90% ~ 98% is cooled to liquid state, is reclaimed by the leakage fluid dram of Recuperative heat exchanger, the liquid outlet of ice chest exchanger base;
2. adsorption treatment step, comprises the first adsorption treatment step and the second adsorption treatment step:
First adsorption treatment step: the low temperature acrylonitrile gas after the first cryogenic condensation step condenses process is led to adsorption tanks, in adsorption tanks, adsorbent is to while the low temperature acrylonitrile gas absorption process after condensation process, carrying out cold and hot exchange makes adsorbent cool, enter the second adsorption treatment step after cooling terminates, switching three-way transfer valve enters the second cryogenic condensation step simultaneously;
Second adsorption treatment step: be input in adsorption tanks by liquid-proof spray cans 203 by the acrylonitrile gas after the second cryogenic condensation step warming up treatment and carry out adsorption treatment, the gas after adsorption treatment is drained in air;
3. adsorb switch step: through the switching of valve, the acrylonitrile gas after cryogenic condensation step process is adsorbed saturated adsorption tanks and switches to from passing into and pass into other adsorption tanks and carry out adsorption treatment;
4. activating and regenerating step, comprising:
To step 3. in pass into steam in the inner coil pipe adsorbing in saturated adsorption tanks that switches Thermal desorption added to adsorbent, will the acrylonitrile desorbing gas step out in adsorbent be adsorbed on; And
Open vavuum pump to vacuumize adsorption tanks, then open back-pressure valve and introduce the step that gas carries out back pressure; And when 3. these adsorption tanks are switched the adsorption tanks as current adsorption treatment by step again, enter the first adsorption treatment step;
5. recycle step: by step 4. in the desorption acrylonitrile gas out obtained is vacuumized to adsorption tanks, be transported to the entrance of frequency conversion air pump, enter next first or second cryogenic condensation step.
The 1. described acrylonitrile gas of step enters in ice chest heat exchanger 105 by Recuperative heat exchanger 108, successively in ice chest heat exchanger 105 first changes greenhouse, second changes greenhouse and the cold and hot exchange of cold-producing medium carries out condensation process simultaneously, finally obtains the acrylonitrile gas of-43 ~-37 DEG C; Then the acrylonitrile gas of-43 ~-37 DEG C changes greenhouse, first through second successively and changes greenhouse and carry out warming up treatment, forms the low temperature acrylonitrile gas after condensation process; First treatment temperature of changing greenhouse is 1 ~ 7 DEG C, and the second treatment temperature of changing greenhouse is-43 ~-37 DEG C.
In the first cryogenic condensation step in the cryogenic condensation step of the method, the second cryogenic condensation step, adsorption treatment step, the first adsorption treatment step, the second adsorption treatment step are not carried out simultaneously, but carry out according to the order of recovery method.
Acrylonitrile gas can adsorb in adsorption tanks, and another adsorption tanks inner coil pipe passes into steam to carry out heating and vacuumize parsing.
Acrylonitrile gas after the second cryogenic condensation step warming up treatment enters adsorption tanks through intake valve, utilize selective to adsorbate of adsorbent being placed on adsorption tanks inner chamber, the i.e. difference of adhesion power between each component and active carbon in acrylonitrile gas and air Mixture, the constituent of air of difficult absorption is separated with the acrylonitrile gas component of easily adsorbing, after having adsorbed, close the intake valve be connected with the air inlet bottom adsorption tanks, open the air bleeding valve be connected with the gas outlet at adsorption tanks top, remaining gas after absorption is discharged by high-altitude cylinder.
Close air bleeding valve, enter activating and regenerating step, molecular activity is utilized to raise and the characteristic of enhancing with temperature, open steam and enter valve and steam goes out valve, saturated vapor is entered in inner coil pipe by the entrance point having adsorbed saturated adsorption tanks inner coil pipe and indirectly adds Thermal desorption to high heat transfer special-purpose activated charcoal, by the acrylonitrile desorbing gas that is adsorbed in activated carbon capillary out; Heating simultaneously, is opened the vavuum pump be connected with adsorption tanks bottom air inlet, is vacuumized, and the gas of extraction is sent to the arrival end of frequency conversion air pump, enters next first or second cryogenic condensation step, makes adsorbent obtain regeneration; Saturated vapor goes out valve by steam and discharges.After being parsed, open back-pressure valve introducing gas and carry out back pressure, low temperature acrylonitrile gas after the condensation process that switching three-way transfer valve obtains pass into the first cryogenic condensation step process in adsorption tanks after, in adsorption tanks, adsorbent carries out cold and hot exchange to the low temperature acrylonitrile gas absorption after condensation process, adsorbent is cooled, opening air bleeding valve after cooling terminates is drained in air by the gas after adsorption treatment, enter the second adsorption treatment step subsequently, switching three-way transfer valve enters the second cryogenic condensation step simultaneously.
Main operational principle of the present utility model is: in the utility model, the high-temperature high-pressure refrigerant gas of being discharged by refrigeration compressor 101 during condensing circuit work enters condensing heat exchanger 102 and is condensed into high-pressure sub-cooled liquid, the vehicle repair major mixture becoming low-temp low-pressure through restricting element step-down enters ice chest heat exchanger 105, the vehicle repair major mixture of low-temp low-pressure evaporates and absorbs the heat by the acrylonitrile gas in ice chest heat exchanger 105 in ice chest heat exchanger 105, make the acrylonitrile vapors flowing through ice chest heat exchanger 105, steam etc. are lowered the temperature liquefaction, cold-producing medium fully vaporize after by gas-liquid separator 107 again the compression of cooled compressor 101 enter next round circulation.
The treatment temperature of Recuperative heat exchanger is about 22 ~ 28 DEG C; Wherein ice chest heat exchanger 105 has two to change greenhouse, and described first treatment temperature of changing greenhouse is about 1 ~ 7 DEG C, and the second treatment temperature of changing greenhouse is about-43 ~-37 DEG C.Acrylonitrile gas enters first by Recuperative heat exchanger 108 through ice chest heat exchanger 105 and changes greenhouse, the cold and hot exchange of cold-producing medium of flowing out with pre-awkward silence at a meeting restricting element 104 carries out condensation process simultaneously, the temperature of gas is made to reduce to about 1 ~ 7 DEG C, then enter second through the 3rd inlet channel and change greenhouse, the cold and hot exchange of cold-producing medium of flowing out with low temperature field restricting element 103 carries out condensation process simultaneously, makes the temperature of gas reduce to about-43 ~-37 DEG C; Then the residual gas of about-43 ~-37 DEG C changes greenhouse, first through second successively again and changes after rising again in greenhouse and enter Recuperative heat exchanger 108 for the low temperature acrylonitrile gas after the condensation process of about 7 ~ 13 DEG C, this part gas carries out cold and hot exchange with the acrylonitrile gas entering Recuperative heat exchanger 108 through the first inlet channel, makes the first precooling of lowering the temperature of acrylonitrile gas enter first after condensation process simultaneously and change greenhouse; Residual gas becomes about 22 ~ 28 DEG C of gases and enters liquid-proof spray cans after then absorbing heat and rising again.Acrylonitrile gas, through Recuperative heat exchanger 108, enters in ice chest heat exchanger 105, changes greenhouse through two, thus reaches the object of acrylonitrile gas continuous cooling to about-40 DEG C.According to the concrete composition of acrylonitrile gas, temperature can adjust in good time.Through the condensation of the pre-cold-peace ice chest heat exchanger 105 of Recuperative heat exchanger 108, the acrylonitrile gas of about 90% ~ 98% is cooled to liquid state, is reclaimed by the liquid outlet bottom the leakage fluid dram of Recuperative heat exchanger 108, ice chest heat exchanger 105.
Described low temperature field restricting element 103 changes greenhouse temperature for regulating second; Pre-awkward silence at a meeting restricting element 104 changes greenhouse temperature for regulating first; Evaporating pressure regulating valve 106 changes greenhouse temperature and outlet evaporating pressure for stablizing first.First changes greenhouse, the second temperature of changing greenhouse reduces successively.Compare second and change greenhouse, first changes greenhouse temperature its refrigerant line pressure higher comparatively greatly, and the utility model adjusts evaporating pressure and systems stabilisation by the evaporating pressure regulating valve 106 be connected with the first the first refrigerant line changing greenhouse.Simultaneously, greenhouse is changed for first, the utility model carries out control to regulate first by pre-awkward silence at a meeting restricting element 104 pairs of cold-producing mediums and changes greenhouse temperature, and can change further by evaporating pressure regulating valve 106 precise fine-adjustment that refrigerant pressure realizes changing first greenhouse temperature.
Acrylonitrile gas after warming up treatment enters in adsorption tanks through intake valve and carries out adsorption treatment; After adsorbent is saturated, pass into Steam Heating, heating simultaneously, opens the vavuum pump 301 be connected with adsorption tanks bottom air inlet, vacuumize, then back pressure pass into the low temperature acrylonitrile gas after condensation process in adsorption tanks, makes adsorbent cool, starts new adsorption treatment.The gas vacuumizing extraction is sent to the entrance of frequency conversion air pump 201, enters next round recycling.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.
Claims (7)
1. the retracting device of an acrylonitrile gas, it is characterized in that: comprise condensing circuit, alternating temperature pressure-variable adsorption loop, described condensing circuit comprises the refrigeration compressor (101), condensing heat exchanger (102), restricting element, ice chest heat exchanger (105), the gas-liquid separator (107) that sequentially connect, and described gas-liquid separator (107) is connected with refrigeration compressor (101); Described ice chest heat exchanger (105) bottom offers liquid outlet;
Alternating temperature pressure-variable adsorption loop comprises 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 more than two, vavuum pump (301), that often organizes alternating temperature pressure-swing absorption apparatus and comprise adsorption tanks, intake valve, parsing valve, air bleeding valve, described adsorption tanks comprise absorption tank body, is placed on the adsorbent of adsorption tanks intracoelomic cavity and makes adsorbent reactivation adds thermal analysis apparatus, oil gas entrance is connected with the entrance of frequency conversion air pump (201), the outlet of frequency conversion air pump (201) is connected with the import of Recuperative heat exchanger (108) first inlet channel, the outlet of the first inlet channel is connected with the liquid passage inlet of ice chest heat exchanger (105), 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), the outlet of the first return gas channel is connected with liquid-proof spray cans (203) entrance, second outlet of three-way switch valve (109) is also connected with liquid-proof spray cans (203) entrance, liquid-proof spray cans (203) outlet is connected by the air inlet of intake valve with absorption tank base, the import of resolving valve is connected with between the air inlet of absorption tank base and intake valve outlet, the outlet of resolving valve is connected by the entrance of vavuum pump (301) with frequency conversion air pump (201), the leakage fluid dram be communicated 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 (304) by air bleeding valve, is also connected with the outlet of back-pressure valve (407) between the gas outlet and the air inlet of air bleeding valve of absorption tank body.
2. the retracting device of acrylonitrile gas according to claim 1, it is characterized in that: in described alternating temperature pressure-variable adsorption loop, the thermal analysis apparatus that adds of alternating temperature pressure-swing absorption apparatus comprises the helical form stainless steel inner coil pipe being arranged on adsorption tanks intracoelomic cavity, the sidewall of absorption tank body is provided with first interface and the second interface; This inner coil pipe entrance point is connected with the outlet that steam enters valve through first interface, and this inner coil pipe port of export is connected with the import that steam goes out valve through the second interface.
3. the retracting device of acrylonitrile gas according to claim 1, is characterized in that: be connected with the first spark arrester between the import of the outlet of described frequency conversion air pump (201) and the first inlet channel of Recuperative heat exchanger (108); The second spark arrester is connected with between the entrance of described oil gas entrance and frequency conversion air pump (201); The 3rd spark arrester is also connected with between described air bleeding valve and high-altitude cylinder (304).
4. the retracting device of acrylonitrile gas according to claim 2, is characterized in that: described alternating temperature pressure-variable adsorption loop comprise 2 groups be arranged in parallel alternately for adsorbing the alternating temperature pressure-swing absorption apparatus with dissection process;
Described two groups of alternating temperature pressure-swing absorption apparatus comprise adsorption tanks A(302), adsorption tanks B(303), intake valve A(401), intake valve B(402), resolve valve A(403), resolve valve B(404), air bleeding valve A(405), air bleeding valve B(406), back-pressure valve (407);
Liquid-proof spray cans (203) is by intake valve A(401) with adsorption tanks A(302) bottom air inlet be connected; Adsorption tanks A(302) air inlet of bottom and intake valve A(401) be connected with between outlet and resolve valve A(403) and import, resolve valve A(403) outlet be connected with vavuum pump (301); Described adsorption tanks A(302) gas outlet on top is by air bleeding valve A(405) be connected with high-altitude cylinder (304), described adsorption tanks A(302) gas outlet on top and air bleeding valve A(405) be also connected with the outlet of back-pressure valve (407) between air inlet; Described adsorption tanks A(302) inner coil pipe entrance point and the steam of inner chamber enters valve A(501) outlet be connected; Adsorption tanks A(302) the inner coil pipe port of export go out valve A(503 with steam) import is connected;
Liquid-proof spray cans (203) is by intake valve B(402) with adsorption tanks B(303) bottom air inlet be connected; Adsorption tanks B(303) air inlet of bottom and intake valve B(402) be connected with between outlet and resolve valve B(404) and import, resolve valve B(404) outlet be connected with vavuum pump (301); Described adsorption tanks B(303) gas outlet on top is by air bleeding valve B(406) be connected with high-altitude cylinder (304), described adsorption tanks B(303) gas outlet on top and air bleeding valve B(406) be also connected with the outlet of back-pressure valve (407) between air inlet; Described adsorption tanks B(303) inner coil pipe entrance point and the steam of inner chamber enters valve B(502) outlet be connected; Adsorption tanks B(303) the inner coil pipe port of export go out valve B(504 with steam) import is connected.
5. the retracting device of acrylonitrile gas according to claim 1, it is characterized in that: be arranged side by side first in described ice chest heat exchanger (105) and changed greenhouse and second and change greenhouse, described first changes greenhouse comprises liquid passage inlet, gas circuit outlet, the second inlet channel of parallel longitudinal setting and the second return gas channel; Second changes the 3rd inlet channel and the 3rd return gas channel that greenhouse comprises parallel longitudinal setting; Described liquid passage inlet forms heat exchanger channels with the second inlet channel, the 3rd inlet channel, the 3rd return gas channel, the second return gas channel, gas circuit outlet successively; Described liquid outlet respectively correspondence is opened in first and changes greenhouse, second and change greenhouse bottom, and each liquid outlet is all communicated with heat exchanger channels.
6. the retracting device of acrylonitrile gas according to claim 5, is characterized in that: described first changes greenhouse also comprises first refrigerant line parallel with the second inlet channel, the second return gas channel; Described second changes greenhouse also comprises the second refrigerant pipeline parallel with the 3rd inlet channel, the 3rd return gas channel; Described restricting element comprises low temperature field restricting element (103), pre-awkward silence at a meeting restricting element (104); The import of the first refrigerant line is communicated with condensing heat exchanger (102) by pre-awkward silence at a meeting restricting element (104), and the outlet of the first refrigerant line is communicated with gas-liquid separator (107) by evaporating pressure regulating valve (106); The import of described second refrigerant pipeline is communicated with condensing heat exchanger (102) by low temperature field restricting element (103), and the outlet of second refrigerant pipeline is communicated with gas-liquid separator (107).
7. the retracting device of acrylonitrile gas according to claim 5, is characterized in that: described each liquid outlet place is equipped with switch valve.
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| CN201520365990.9U CN204723980U (en) | 2015-05-29 | 2015-05-29 | A kind of retracting device of acrylonitrile gas |
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| CN201520365990.9U CN204723980U (en) | 2015-05-29 | 2015-05-29 | A kind of retracting device of acrylonitrile gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826447A (en) * | 2015-05-29 | 2015-08-12 | 南京都乐制冷设备有限公司 | Device and method for recycling acrylonitrile gas |
| CN110044676A (en) * | 2019-04-24 | 2019-07-23 | 上海汉克威自动化科技有限公司 | One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method |
-
2015
- 2015-05-29 CN CN201520365990.9U patent/CN204723980U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826447A (en) * | 2015-05-29 | 2015-08-12 | 南京都乐制冷设备有限公司 | Device and method for recycling acrylonitrile gas |
| CN110044676A (en) * | 2019-04-24 | 2019-07-23 | 上海汉克威自动化科技有限公司 | One kind being used for acrylonitrile installation oxygen analyzer sample gas pretreatment system and method |
| CN110044676B (en) * | 2019-04-24 | 2022-01-14 | 上海汉克威自动化科技有限公司 | Sample gas pretreatment system and method for acrylonitrile device oxygen analyzer |
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