CN213132558U - Air deep separation pretreatment system - Google Patents
Air deep separation pretreatment system Download PDFInfo
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- CN213132558U CN213132558U CN202021672243.7U CN202021672243U CN213132558U CN 213132558 U CN213132558 U CN 213132558U CN 202021672243 U CN202021672243 U CN 202021672243U CN 213132558 U CN213132558 U CN 213132558U
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Abstract
The application discloses air deep separation pretreatment system, including advance kind adsorption system, safety control and switching system, regeneration system and control system. Two adsorbers are adopted, a safety control and switching system is arranged between the two adsorbers, a regeneration system is used for regenerating the adsorbents, and the whole device is automatically controlled by a control system. The utility model can realize the mutual standby of a plurality of groups between the inlet pipeline and the outlet pipeline of the two adsorbers, and the emptying operation of the other device is not delayed in the standby process, thereby improving the operation stability and safety of the device; a multi-branch regenerated gas inlet system is adopted, a proper single branch or a plurality of branches are selected to be matched according to the flow and temperature working conditions of regenerated gas, a plurality of heaters are mutually standby, and the scientificity and the stability of the operation of the device are further ensured.
Description
Technical Field
The application relates to the technical field of air separation, in particular to an air deep separation pretreatment system.
Background
Air separation, air separation for short, is a process of separating oxygen and nitrogen from air by deep freezing, adsorption, membrane separation and other methods or simultaneously extracting rare gases such as helium, argon and the like by utilizing different physical properties of various components in the air, and is widely applied to industrial departments such as metallurgy, chemical industry, petroleum, machinery, mining, food, military and the like.
The air separation technology is a mature technology, and the specific process flow comprises the steps of filtering raw material air, compressing the filtered raw material air, preliminarily pre-cooling the compressed raw material air, introducing the pre-cooled raw material air into a pretreatment system comprising a molecular sieve adsorber, purifying the pre-cooled raw material air, and performing cryogenic separation on the purified raw material air to separate air from oxygen. The pretreatment system in the prior art has the problems of poor stability and safety in the use process, and when the adsorber fails, shutdown is possibly caused, the production progress is delayed, and potential safety hazards are possibly caused.
Disclosure of Invention
The application provides an air deep separation pretreatment system, improves pretreatment systems's operating stability and security, promotes the preliminary treatment effect.
The technical scheme adopted by the application is as follows:
an air deep separation pretreatment system comprising:
the sample injection adsorption system comprises a first molecular sieve adsorber and a second molecular sieve adsorber which can be switched or used simultaneously, wherein the gas inlets of the first molecular sieve adsorber and the second molecular sieve adsorber are connected with precooled air pipelines, and the gas outlets of the first molecular sieve adsorber and the second molecular sieve adsorber are connected with a subsequent cryogenic system;
the safety control and switching system comprises one or more control valves respectively arranged between the gas inlet pipelines and the gas outlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber, and can communicate the gas inlet pipelines or the gas outlet pipelines of the two adsorbers to realize standby or switching;
the regeneration system comprises a regeneration gas inlet pipeline, can be directly connected with the first molecular sieve adsorber and the second molecular sieve adsorber or connected with one or more heating systems connected in parallel, and controls the regeneration gas to regenerate the adsorbent of any adsorber and then exhaust the adsorbent;
and the control system is connected with each control valve through communication and selectively controls the opening and closing of each control valve.
Preferably, the air inlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber are respectively provided with an air inlet switch valve associated with temperature monitoring, and the opening and closing of the air inlet switch valve are controlled according to the temperature.
Preferably, two groups of control valves are connected between the gas inlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber, each group of control valves comprises two control valves, the two control valves are communicated with each other and then connect the gas inlet pipelines of the two adsorbers, and the control valves in the same group are vented through a vent pipeline.
Preferably, the vent line is connected to a vent muffler.
Preferably, two groups of control valves are connected between the gas outlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber, wherein the first group of control valves comprises two control valves, a gas inlet pipeline of regeneration gas is connected between the two control valves, and the second group of control valves is one control valve.
Preferably, the intake line of the regeneration gas is provided with a control valve with flow monitoring, the opening of which can be controlled according to the magnitude of the flow.
Preferably, a temperature monitoring device is arranged on an intake pipeline of the regeneration gas.
Since the technical scheme is used, the utility model discloses following beneficial effect has: by adopting the two adsorbers, a plurality of groups of inlet pipelines and outlet pipelines of the two adsorbers can be mutually reserved, the emptying operation of the other device is not delayed in the reserving process, and the running stability and safety of the device are improved; a multi-branch regenerated gas inlet system is adopted, a proper single branch or a plurality of branches are selected to be matched according to the flow and temperature working conditions of regenerated gas, a plurality of heaters are mutually standby, and the scientificity and the stability of the operation of the device are further ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of an air deep separation pretreatment system provided by the present application.
Wherein, 1 first molecular sieve adsorber, 2 second molecular sieve adsorber, 3 first control valve, 4 second control valve, 5 third control valve, 6 fourth control valve, 7 fifth control valve, 8 sixth control valve, 9 seventh control valve, 10 eighth control valve, 11 ninth control valve, 12 tenth control valve, 13 eleventh control valve, 14 twelfth control valve, 15 first heater, 16 second heater, 17 vent muffler.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationship shown in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, an air deep separation pretreatment system includes a sample adsorption system, a safety control and switching system, a regeneration system and a control system.
The sample injection adsorption system comprises a first molecular sieve adsorber 1 and a second molecular sieve adsorber 2 which can be switched or used simultaneously, specifically, an air pipeline after precooling is divided into two branch pipelines, wherein the first branch pipeline is connected with the first molecular sieve adsorber 1 through a first control valve 3, the second branch pipeline is connected with the second molecular sieve adsorber 2 through a second control valve 4, outlet pipelines of the first molecular sieve adsorber 1 and the second molecular sieve adsorber 2 are connected to a subsequent cryogenic system through a third control valve 5 and a fourth control valve 6, and part of the outlet pipelines can be used as instrument air or generate switching loss.
Two groups of control valves are arranged on one sides, close to the adsorbers, of the first control valve 3 and the second control valve 4 between gas inlet pipelines of the first molecular sieve adsorber 1 and the second molecular sieve adsorber 2, each group of control valves comprises two control valves, the first group of control valves comprises a fifth control valve 7 and a sixth control valve 8 which can be communicated with each other, the two control valves are vented through vent pipelines, the second group of control valves comprises a seventh control valve 9 and an eighth control valve 10 which can be communicated with each other, and the two control valves are vented through vent pipelines. Thus, in this embodiment, two adsorbers may be used as a backup, or may be operated simultaneously when the throughput is high.
First group's control valve and second group's control valve have realized the intercommunication between two adsorbers for this device not only has the reserve when emergent between two adsorbers, also has the reserve when emergent between the different group's control valve simultaneously, has further promoted the operating stability and the security of device. A third group of control valves and a fourth group of control valves are arranged between the gas outlet pipelines of the first molecular sieve adsorber 1 and the second molecular sieve adsorber 2 and on one sides, close to the adsorbers, of the third control valve 5 and the fourth control valve 6, wherein the third group of control valves comprises a ninth control valve 11 and a tenth control valve 12 which can be communicated with each other, a gas inlet pipeline of regeneration gas is connected between the ninth control valve and the tenth control valve, and the regeneration of different molecular sieve adsorbers can be realized by the aid of the controllable regeneration gas through the ninth control valve 11 or the tenth control valve 12.
One fourth set of control valves, including an eleventh control valve 13, may connect the outlet lines of the two adsorbers. Therefore, emergency standby exists between the outlet pipelines of the two adsorbers of the device, and emergency standby is realized between different groups of control valves.
The regeneration system is used for regenerating the adsorbent in the adsorbent, and the regenerated gas is exhausted after being subjected to the adsorbent regeneration by the regeneration system. The regeneration system comprises a regeneration gas inlet pipeline which is divided into two paths after passing through a twelfth control valve 14, wherein the first path is directly connected with the adsorber, and the second path is preferably connected with the adsorber through a first heater 15 and a second heater 16 which are connected in parallel.
When the temperature of the regeneration gas is higher, the regeneration gas is directly introduced into the adsorber for regeneration without heating. When the temperature of the regeneration gas is lower, the regeneration gas enters the absorber after being heated by the heaters, the two heaters are mutually standby, the stability of the operation of the device is ensured again, and when the required flow is overlarge, the secondary heaters can be started at the same time. Meanwhile, under special conditions, the first branch can be used with the second branch, and the temperature of the regeneration gas at the outlet of the second branch is adjusted through the first branch.
The control system can be selected as a DCS control system, is connected with each control valve through communication, and selectively controls the opening and closing of each control valve so as to realize the automation of control.
Preferably, the first control valve 3 and the second control valve 4 on the gas inlet lines of the first molecular sieve adsorber 1 and the second molecular sieve adsorber 2 are respectively associated with temperature monitoring, and the opening and closing of the gas inlet switch valve are controlled according to the temperature to maintain the stability of the temperature in the adsorbers.
Preferably, a vent muffler 17 is connected to the vent line to maintain venting to environmental requirements.
Preferably, the twelfth control valve 14 is associated with flow monitoring, and the opening degree of the control valve can be controlled according to the flow so as to maintain the operation stability of the device.
Preferably, a temperature monitoring device is arranged on an air inlet pipeline of the regeneration gas to monitor the temperature of the regeneration gas and ensure the regeneration effect.
Where not mentioned in this application, can be accomplished using or referencing existing technology. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. An air deep separation pretreatment system, comprising:
the sample injection adsorption system comprises a first molecular sieve adsorber and a second molecular sieve adsorber which can be switched or used simultaneously, wherein the gas inlets of the first molecular sieve adsorber and the second molecular sieve adsorber are connected with precooled air pipelines, and the gas outlets of the first molecular sieve adsorber and the second molecular sieve adsorber are connected with a subsequent cryogenic system;
the safety control and switching system comprises one or more control valves respectively arranged between the gas inlet pipelines and the gas outlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber, and can communicate the gas inlet pipelines or the gas outlet pipelines of the two adsorbers to realize standby or switching;
the regeneration system comprises a regeneration gas inlet pipeline, can be directly connected with the first molecular sieve adsorber and the second molecular sieve adsorber or connected with one or more heating systems connected in parallel, and controls the regeneration gas to regenerate the adsorbent of any adsorber and then exhaust the adsorbent;
and the control system is connected with each control valve through communication and selectively controls the opening and closing of each control valve.
2. The air deep separation pretreatment system of claim 1, wherein the air inlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber are respectively provided with an air inlet switch valve associated with temperature monitoring, and the opening and the closing of the air inlet switch valve are controlled according to the temperature.
3. The air deep separation pretreatment system of claim 1, wherein two sets of control valves are connected between the air inlet pipelines of the first molecular sieve adsorber and the second molecular sieve adsorber, each set of control valves comprises two control valves, the two control valves are connected with each other and then connect the air inlet pipelines of the two adsorbers, and the control valves in the same set are vented through a vent pipeline.
4. The air deep separation pretreatment system of claim 3, wherein a vent muffler is connected to the vent line.
5. The air deep separation pretreatment system of claim 1, wherein two sets of control valves are connected between the air outlet lines of the first molecular sieve adsorber and the second molecular sieve adsorber, wherein the first set of control valves comprises two, the set of control valves is connected between the air inlet lines of the regeneration gas, and the second set of control valves is one.
6. The air deep separation pretreatment system of claim 1, wherein an intake line of the regeneration gas is provided with a control valve with flow rate monitoring, and an opening degree of the control valve can be controlled according to a magnitude of the flow rate.
7. The air deep separation pretreatment system of any one of claims 1 to 6, wherein: and a temperature monitoring device is arranged on the gas inlet pipeline of the regenerated gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021672243.7U CN213132558U (en) | 2020-08-12 | 2020-08-12 | Air deep separation pretreatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021672243.7U CN213132558U (en) | 2020-08-12 | 2020-08-12 | Air deep separation pretreatment system |
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| CN213132558U true CN213132558U (en) | 2021-05-07 |
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| CN202021672243.7U Active CN213132558U (en) | 2020-08-12 | 2020-08-12 | Air deep separation pretreatment system |
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