CN211070117U - Device for regenerating adsorbent and recovering organic compound by utilizing hot nitrogen - Google Patents
Device for regenerating adsorbent and recovering organic compound by utilizing hot nitrogen Download PDFInfo
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- CN211070117U CN211070117U CN202021149410.XU CN202021149410U CN211070117U CN 211070117 U CN211070117 U CN 211070117U CN 202021149410 U CN202021149410 U CN 202021149410U CN 211070117 U CN211070117 U CN 211070117U
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Abstract
The embodiment of the application discloses an utilize hot nitrogen gas to make adsorbent regeneration and retrieve organic compound's device, the device desorption nitrogen gas can recycle, and desorption gas temperature can be adjusted in a flexible way. Therefore, the device for regenerating the adsorbent and recovering the organic compound by utilizing the hot nitrogen comprises an adsorption concentration mechanism and a desorption mechanism, wherein the desorption mechanism comprises a desorption circulating fan, a heater, a condensation heat exchanger and a condensate tank; the desorption circulating fan, the heater and the adsorption concentration mechanism are connected through a circulating pipe to form a desorption circulating loop, and a nitrogen gas inlet pipe and a condensation recovery pipe are arranged on the desorption circulating loop; the nitrogen gas inlet pipe is provided with a first control valve, the condensation recovery pipe is provided with a second control valve and the condensation heat exchanger, and a condensate outlet of the condensation heat exchanger is in butt joint with the condensate tank.
Description
Technical Field
The utility model belongs to the technical field of organic waste gas's purification and recovery, especially, relate to an utilize hot nitrogen gas to make adsorbent regeneration and retrieve organic compound's device.
Background
Currently, for organic waste gas treatment, activated carbon or zeolite is often used for adsorption and concentration, then hot air is used for blowing off adsorbed organic components, and the blown-off organic gases are removed by means of thermal oxidation. The regeneration of the desorption medium is realized by hot air, and although the regeneration device has the advantages of low cost, high efficiency and the like, the regeneration device also has a plurality of defects, such as corrosive gas or dioxin and the like generated in the thermal oxidation process for halogen-containing gas, high requirements on the corrosion resistance of equipment and damage to the environment. Moreover, the process is also not suitable for use in explosion-proof environments. Other processes such as steam desorption can generate a large amount of sewage in the treatment process of water-soluble substances, thereby causing secondary pollution. And the recovered solvent has high water content and poor quality, and the organic matters with high water solubility also need subsequent secondary treatment, and is not suitable for the treatment of organic matters with high hydrolysis and high boiling points.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the embodiments of the present invention is to provide an apparatus for regenerating an adsorbent and recovering organic compounds by using hot nitrogen, in which the desorbed nitrogen can be recycled and the temperature of the desorbed gas can be flexibly adjusted.
Therefore, the device for regenerating the adsorbent and recovering the organic compound by utilizing the hot nitrogen comprises an adsorption concentration mechanism and a desorption mechanism, wherein the desorption mechanism comprises a desorption circulating fan, a heater, a condensation heat exchanger and a condensate tank;
the desorption circulating fan, the heater and the adsorption concentration mechanism are connected through a circulating pipe to form a desorption circulating loop, and a nitrogen gas inlet pipe and a condensation recovery pipe are arranged on the desorption circulating loop;
the nitrogen gas inlet pipe is provided with a first control valve, the condensation recovery pipe is provided with a second control valve and the condensation heat exchanger, and a condensate outlet of the condensation heat exchanger is in butt joint with the condensate tank.
The condensation heat exchangers are connected in series on the condensation recovery pipes;
a heating medium outlet of the tail end of the condensing heat exchanger is in butt joint with a cooling medium inlet of the front end of the condensing heat exchanger;
the refrigerant outlet of the condensation heat exchanger positioned at the foremost end is connected with the desorption circulation loop through a return pipe;
and a third control valve is arranged on the return pipe, and a fourth control valve is arranged on a pipeline between the return pipe and the condensation recovery pipe of the desorption circulation loop.
In some embodiments, a condensing fan is disposed on the condensing recovery pipe.
In some embodiments, a fifth control valve is provided on the conduit connecting the condensate outlet to the condensate tank.
In some embodiments, a pipe sight glass is provided on a pipe connecting the condensate outlet and the condensate tank.
In some embodiments, the adsorption concentration mechanism is a zeolite wheel or an activated carbon adsorption wheel.
In some embodiments, the desorption circulation loop is further provided with an exhaust pipeline, and the exhaust pipeline is provided with an exhaust control valve and an oxygen content instrument.
In some embodiments, a desorption outlet valve and a desorption inlet valve are respectively arranged on the desorption circulation loop at the desorption outlet and the desorption inlet of the adsorption concentration mechanism;
and an adsorption inlet valve and an adsorption outlet valve are respectively arranged at the adsorption inlet and the adsorption outlet of the adsorption concentration mechanism on the adsorption inlet pipeline of the adsorption concentration mechanism.
In some embodiments, the exhaust pipeline is connected to an adsorption inlet pipeline of the adsorption concentration mechanism, and an adsorption fan is disposed on the adsorption inlet pipeline.
In some embodiments, the adsorption concentration mechanism is provided in multiple sets in parallel on the circulation tube.
Compared with the prior art, at least one embodiment of the application has the following beneficial effects:
the condensing heat exchanger is provided with a plurality of condensing heat exchangers, so that the temperature of the desorbed gas can be gradually reduced to a set value, and organic condensate is separated out. And meanwhile, the desorbed waste gas after the organic matters are recovered through heat exchange of the condensing heat exchanger and the heat exchange of the foremost condensing heat exchanger are refluxed to the desorption circulating loop to continue to desorb the adsorption concentration mechanism, and the desorbed nitrogen can be recycled.
In addition, through adjusting heater, second control valve, third control valve and fourth control valve, can realize the nimble regulation to desorption gas temperature, guarantee desorption temperature's stability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen according to an embodiment of the present invention;
wherein: 1-desorption outlet valve; 2-an adsorption inlet valve; 3-an adsorption concentration mechanism; 4-an adsorption outlet valve; 5-desorption inlet valve; 6-an adsorption fan; 7-an exhaust funnel; 8-a first control valve; 9-desorption circulating fan; 10-a second control valve; 11-a fourth control valve; 12-a third control valve; 13-an exhaust valve; 14-an oxygen content meter; 15-a heater; 16-a condensing fan; 17-a condensing heat exchanger; 18-circulation pipe; 19-nitrogen inlet pipe; 20-a condensation recovery pipe; 21-a fifth control valve; 22-borescope; 23-condensate tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the apparatus for regenerating an adsorbent and recovering organic compounds by using hot nitrogen provided in the embodiment of the present application includes an adsorption concentration mechanism 3 and a desorption mechanism, and the desorption mechanism includes a desorption circulating fan 9, a heater 15, a condensing heat exchanger 17 and a condensate tank 23.
Specifically, the desorption circulating fan 9, the heater 15 and the adsorption concentration mechanism 3 are connected through a circulating pipe 18 to form a desorption circulating loop, and a nitrogen gas inlet pipe 19 and a condensation recovery pipe 20 are arranged on the desorption circulating loop;
the nitrogen inlet pipe 19 is provided with a first control valve 8, the condensation recovery pipe 20 is provided with a second control valve 10 and a condensation heat exchanger 17, and a condensate outlet of the condensation heat exchanger 17 is in butt joint with a condensate tank 23.
In this application embodiment, adsorb concentrated mechanism 3 and adsorb after the saturation, input desorption nitrogen gas in to desorption circulation loop through nitrogen gas intake pipe 19, desorption nitrogen gas is under desorption circulating fan 9's negative pressure is drawn, it blows off to get into to adsorb concentrated mechanism 3 with absorbent organic component after heater 15 heats, the realization is to realizing the regeneration of desorbent, blow off the nitrogen gas that contains organic matter that gets off and get into behind condensation recovery pipe 20 and the heat transfer of condensation heat exchanger 17, organic waste gas becomes liquid phase separation from the gaseous state in the condensation process, and it collects to get into condensate tank 23, the realization is to the recovery of organic compound.
The whole device adopts nitrogen gas for desorption, has low requirements on the corrosion resistance of equipment, can realize the recycling of high-quality resources, and is particularly suitable for the desorption regeneration of the adsorbent in the fireproof and explosion-proof environment.
Referring to fig. 1, in some possible embodiments, the condensing heat exchanger 17 is connected in series on the condensing recovery pipe 20; the heating medium outlet of the rearmost condensing heat exchanger 17 is in butt joint with the refrigerant inlet of the foremost condensing heat exchanger 17, the refrigerant outlet of the foremost condensing heat exchanger 17 is connected with the desorption circulation loop through a return pipe, the return pipe is provided with a third control valve 12, and the pipeline of the desorption circulation loop between the return pipe and the condensing recovery pipe 20 is provided with a fourth control valve 11.
In the embodiment of the present application, the condensing heat exchanger 17 is provided in plurality, so that the desorption gas temperature can be gradually reduced to the set value, and the organic condensate can be separated out. And meanwhile, the desorbed waste gas after the heat exchange of the condensing heat exchanger 17 and the organic matter recovery flows back to the desorption circulation loop to continue to desorb the adsorption concentration mechanism 3 after the heat exchange of the condensing heat exchanger 17 at the most front end, and the desorbed nitrogen can be recycled.
In addition, by adjusting the heater 15, the second control valve 10, the third control valve 12 and the fourth control valve 11, the temperature of the desorbed gas can be flexibly adjusted, and the stability of the desorption temperature can be ensured.
Referring to fig. 1, in particular, in some possible embodiments, a condensing fan 16 is disposed on the condensing recovery pipe 20, and a fifth control valve 21 is disposed on a pipeline connecting the condensate outlet and the condensate tank 23. The pipeline connecting the condensate outlet and the condensate tank 23 can be provided with a pipeline sight glass 22, and when no liquid flows out from the pipeline sight glass 22, the end of the condensation process can be judged.
The adsorption concentration mechanism 3 can adopt a zeolite rotating wheel, and the corresponding adsorbent is zeolite; wherein, the zeolite runner is the tubular structure, and the adsorbent matching is installed in this tubular structure, and the zeolite runner includes adsorption zone, desorption district and cooling space, and the desorption district has desorption export and desorption entry, and the adsorption zone has the adsorption entry and adsorbs the export. Of course, the adsorption concentration mechanism 3 may also adopt an activated carbon adsorption rotating wheel.
In addition, a desorption outlet valve 1 and a desorption inlet valve 5 are respectively arranged at a desorption outlet and a desorption inlet of the adsorption concentration mechanism 3 on the desorption circulation loop; the adsorption inlet and the adsorption outlet of the adsorption concentration mechanism 3 on the adsorption inlet pipeline of the adsorption concentration mechanism 3 are respectively provided with an adsorption inlet valve 2 and an adsorption outlet valve 4, and the adsorption inlet pipeline is provided with an adsorption fan 6.
In addition, when a plurality of groups of adsorption concentration mechanisms 3 are arranged on the circulating pipe 24 in parallel, at least one adsorption concentration mechanism 3 is in a standby or desorption state under the condition of ensuring normal adsorption, and the plurality of adsorption concentration mechanisms 3 alternately perform adsorption and desorption.
It should be noted that, in some embodiments, an exhaust pipeline may be further disposed on the desorption circulation loop, and the exhaust pipeline is provided with an exhaust control valve 13 and an oxygen content meter 14, and the exhaust pipeline is connected to the adsorption inlet pipeline of the adsorption concentration mechanism 3.
In the embodiment of the present application, after one of the adsorption concentration mechanisms 3 is saturated, the corresponding adsorption inlet valve 2 and adsorption outlet valve 4 are closed, the desorption inlet valve 5 and desorption outlet valve 1 are opened, and the fourth control valve 11 is opened. And opening the first control valve 8, filling nitrogen into the adsorption concentration mechanism 3, replacing air in the pipeline and the adsorption concentration mechanism 3, and discharging the air into the adsorption inlet pipeline through the exhaust valve. The nitrogen displacement process may be stopped when the oxygen content meter 14 detects that the oxygen content in the gas has dropped below 3%.
Referring to fig. 1, the working process of the above embodiment will be described in detail by taking an activated carbon adsorption bed as an example, and the whole process of regenerating the adsorbent and condensing and recovering the organic compounds by using the above embodiment comprises the following treatment stages: the method comprises an adsorption stage, a nitrogen replacement stage, a heating desorption stage, a condensation stage, a cooling stage and a non-condensable gas treatment stage.
An adsorption stage: the adsorption inlet valve 2 and the adsorption outlet valve 4 are opened, the adsorption fan 6 starts to work, the gas containing VOC is introduced into the activated carbon adsorption bed, the VOC components in the gas are adsorbed by the adsorption bed, and the air directly passes through the adsorption bed and then is sent into the exhaust funnel 7 through the fan to be discharged. Wherein, VOC means volatile organic compounds.
Nitrogen replacement stage: after one of the adsorption beds is saturated in adsorption, the corresponding adsorption inlet valve 2 and the corresponding adsorption outlet valve 4 are closed, the desorption inlet valve 5 and the desorption outlet valve 1 are opened, the fourth control valve 11 is opened, the first control valve 8 is opened, nitrogen is filled into the adsorption beds, air in the pipeline and the adsorption beds is replaced, and the air is discharged into the adsorption inlet pipeline through the exhaust valve. The nitrogen displacement process may be stopped when the oxygen content meter 14 detects that the oxygen content in the gas has dropped below 3%.
A temperature rising desorption stage: on the basis of the opening state of the valves and the equipment in the nitrogen replacement stage, the first control valve 8 and the exhaust valve 13 are closed, and the desorption circulating fan 9 is opened. The heater 15 is activated and the cycle gas begins to heat to the target temperature and the heat in the nitrogen is transferred to the adsorbent bed to desorb the adsorbed VOC components and follow the nitrogen cycle.
A condensation stage: and (3) opening the second control valve 10 and the third control valve 12 and starting the condensation fan 16 while maintaining the desorption cycle, and controlling the amount of gas entering the condensation system by adjusting the opening degrees of the second control valve 10, the third control valve 12 and the fourth control valve 11. The gas entering the condensing system is gradually cooled to a target temperature through each condensing heat exchanger 17. Meanwhile, the condensed organic components flow out through the fifth control valve 21 and enter the condensate tank 23 for temporary storage. The condensation process ends when no liquid outflow is observed in the borescope 22.
And (3) cooling: and stopping the heater 15, adjusting the opening of the second control valve 10 to enable more gas to enter the condensing system for cooling, and forcibly cooling the adsorption bed after the circulating gas is cooled. When the temperature drops below 60 ℃, the cooling process can be stopped.
Noncondensable gas treatment stage: and stopping the desorption circulating fan 9 and the condensing fan 16, opening the first control valve 8, filling nitrogen into the adsorption bed, replacing non-condensable gas in the pipeline and the adsorption bed, discharging the non-condensable gas into the adsorption inlet pipeline through the exhaust valve, discharging the high-concentration non-condensable gas after re-adsorption by the adsorption bed to reach the standard, closing all valves after emptying the non-condensable gas, and stopping the adsorption bed after desorption for later use.
The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (9)
1. The utility model provides an utilize hot nitrogen gas to make adsorbent regeneration and retrieve device of organic compound, includes concentrated mechanism of absorption and desorption mechanism, its characterized in that: the desorption mechanism comprises a desorption circulating fan, a heater, a condensation heat exchanger and a condensate tank;
the desorption circulating fan, the heater and the adsorption concentration mechanism are connected through a circulating pipe to form a desorption circulating loop, and a nitrogen gas inlet pipe and a condensation recovery pipe are arranged on the desorption circulating loop;
a first control valve is arranged on the nitrogen inlet pipe, a second control valve and the condensation heat exchanger are arranged on the condensation recovery pipe, and a condensate outlet of the condensation heat exchanger is in butt joint with the condensate tank;
the condensation heat exchangers are connected in series on the condensation recovery pipes;
a heating medium outlet of the tail end of the condensing heat exchanger is in butt joint with a cooling medium inlet of the front end of the condensing heat exchanger;
the refrigerant outlet of the condensation heat exchanger positioned at the foremost end is connected with the desorption circulation loop through a return pipe;
and a third control valve is arranged on the return pipe, and a fourth control valve is arranged on a pipeline between the return pipe and the condensation recovery pipe of the desorption circulation loop.
2. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 1, wherein: and a condensation fan is arranged on the condensation recovery pipe.
3. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 1, wherein: and a fifth control valve is arranged on a pipeline connecting the condensate outlet and the condensate tank.
4. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 3, wherein: and a pipeline sight glass is arranged on a pipeline connecting the condensate outlet and the condensate tank.
5. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 1, wherein: the adsorption concentration mechanism is a zeolite rotating wheel or an active carbon adsorption rotating wheel.
6. The apparatus for regenerating an adsorbent and recovering an organic compound using hot nitrogen according to any one of claims 1 to 5, wherein: an exhaust pipeline is further arranged on the desorption circulation loop, and an exhaust control valve and an oxygen content instrument are arranged on the exhaust pipeline.
7. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 6, wherein: a desorption outlet valve and a desorption inlet valve are respectively arranged on the desorption circulation loop and positioned at the desorption outlet and the desorption inlet of the adsorption concentration mechanism;
and an adsorption inlet valve and an adsorption outlet valve are respectively arranged at the adsorption inlet and the adsorption outlet of the adsorption concentration mechanism on the adsorption inlet pipeline of the adsorption concentration mechanism.
8. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 7, wherein: the exhaust pipeline is connected with an adsorption inlet pipeline of the adsorption concentration mechanism, and an adsorption fan is arranged on the adsorption inlet pipeline.
9. The apparatus for regenerating an adsorbent and recovering organic compounds using hot nitrogen as claimed in claim 8, wherein: and the adsorption concentration mechanisms are arranged on the circulating pipes in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021149410.XU CN211070117U (en) | 2020-06-19 | 2020-06-19 | Device for regenerating adsorbent and recovering organic compound by utilizing hot nitrogen |
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| CN202021149410.XU CN211070117U (en) | 2020-06-19 | 2020-06-19 | Device for regenerating adsorbent and recovering organic compound by utilizing hot nitrogen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452774A (en) * | 2022-02-26 | 2022-05-10 | 杭州捷瑞空气处理设备有限公司 | VOC waste gas recovery treatment system and treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452774A (en) * | 2022-02-26 | 2022-05-10 | 杭州捷瑞空气处理设备有限公司 | VOC waste gas recovery treatment system and treatment method |
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