CN216080638U - Single-compression double-pressurization double-expansion high-purity nitrogen preparation device - Google Patents
Single-compression double-pressurization double-expansion high-purity nitrogen preparation device Download PDFInfo
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- CN216080638U CN216080638U CN202122043221.5U CN202122043221U CN216080638U CN 216080638 U CN216080638 U CN 216080638U CN 202122043221 U CN202122043221 U CN 202122043221U CN 216080638 U CN216080638 U CN 216080638U
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Abstract
The utility model relates to the technical field of nitrogen making equipment, in particular to a single-compression double-pressurization double-expansion high-purity nitrogen making device which comprises an air compressor, an adsorption dryer, a pressure swing adsorber, a main heat exchanger, a rectifying tower, an expander and a supercharger, wherein the air compressor is connected with an oil eliminator through a pipeline, the oil eliminator is connected with the adsorption dryer and a freezing dryer through pipelines, the adsorption dryer and the freezing dryer are connected with a four-stage filter through pipelines, the four-stage filter is connected with a main pipeline and a branch pipeline, the main pipeline is connected with the pressure swing adsorber, and the pressure swing adsorber is connected with the main heat exchanger through a pipeline. The pressure of the pressure swing absorber is controlled by the booster, the adsorption pressure in the pressure swing absorber is controlled to meet the adsorption requirement, and after the regeneration of the adsorbent is finished, the weak adsorption component is used for boosting the adsorption bed until the adsorption pressure position, so that the adsorption effect is ensured to the maximum extent.
Description
Technical Field
The utility model relates to the technical field of nitrogen making equipment, in particular to a single-compression double-pressurization double-expansion high-purity nitrogen making device.
Background
With the rapid development of various industries such as electronic industry, metallurgy, medicine, chemical industry, new material industry, petrochemical industry and the like, the demand for nitrogen products is more and more large, an air separation plant for preparing nitrogen is a large energy consumer, and how to effectively reduce energy consumption is of great importance due to long-term operation and large energy consumption. At present, the common method is that partial expansion and other throttling are carried out, and the work output by an expander is pressurized and released to the air by adopting a fan; liquid air is not supercooled or is simply subjected to heat exchange and supercooling with part of fluid, the adjustment and solidification of equipment are not flexible, and the product is insufficient or surplus emptying is wasted.
Therefore, a single-compression double-pressurization double-expansion high-purity nitrogen preparation device is provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a single-compression double-pressurization double-expansion high-purity nitrogen preparation device.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the single-compression double-pressurization double-expansion high-purity nitrogen preparation device comprises an air compressor, an adsorption type dryer, a pressure swing adsorber, a main heat exchanger, a rectifying tower, an expansion machine and a booster, wherein the air compressor is connected with an oil remover through a pipeline, the oil remover is connected with the adsorption type dryer and a freezing type dryer through pipelines, the adsorption type dryer and the freezing type dryer are connected with a four-stage filter through pipelines, the four-stage filter is connected with a main pipeline and branch pipelines, the main pipeline is connected with the pressure swing adsorber, the pressure swing adsorber is connected with the main heat exchanger through a pipeline, and the main heat exchanger is connected with the expansion machine, the rectifying tower and a condensation evaporator through pipelines;
the one end of minute pipeline is connected on the booster compressor, and the one end of booster compressor is connected with the pipeline, and connect in two on the pressure swing adsorber.
Preferably, a pipeline filter is connected and installed between the oil remover and the adsorption dryer through a pipeline.
Preferably, a stop valve is arranged between the pipelines of the two adsorption dryers.
Preferably, a stop valve is arranged between the main pipeline and the branch pipeline.
Preferably, the expander is connected to a muffler.
Preferably, a liquid nitrogen subcooler is further arranged between the rectifying tower and the pipelines at the two sides of the condensation evaporator.
The utility model has the beneficial effects that:
the pressure of the pressure swing absorber is controlled by the booster, the adsorption pressure in the pressure swing absorber is controlled to meet the adsorption requirement, and after the regeneration of the adsorbent is finished, the weak adsorption component is used for boosting the adsorption bed until the adsorption pressure position, so that the adsorption effect is ensured to the maximum extent.
Drawings
Fig. 1 is a schematic structural diagram of a single-compression double-pressurization double-expansion high-purity nitrogen preparation device provided by the utility model.
In the figure: the system comprises an air compressor 1, an oil remover 2, an adsorption dryer 3, a four-stage filter 4, a pressure swing adsorber 5, a main heat exchanger 6, a condensing evaporator 7, a liquid nitrogen subcooler 8, a rectifying tower 9, an expander 10, a supercharger 11, a refrigeration dryer 12, a pipeline filter 13, a branch pipeline 14 and a main pipeline 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Those not described in detail in this specification are within the skill of the art.
The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Example (b): referring to fig. 1, the single-compression double-pressurization double-expansion high-purity nitrogen preparation device comprises an air compressor 1, an adsorption type dryer 3, a pressure swing adsorber 5, a main heat exchanger 6, a rectifying tower 9, an expansion machine 10 and a supercharger 11, wherein the air compressor 1 is connected with an oil remover 2 through a pipeline, the oil remover 2 is connected with the adsorption type dryer 3 and a freezing type dryer 12 through a pipeline, a stop valve is arranged between the pipelines of the two adsorption type dryers 3, the adsorption type dryer 3 and the freezing type dryer 12 are connected with a four-stage filter 4 through pipelines, a pipeline filter 13 is arranged between the oil remover 2 and the adsorption type dryer 3 through pipeline connection, the four-stage filter 4 is connected with a main pipeline 15 and a branch pipeline 14, the main pipeline 15 is connected with the adsorption type adsorber 5, the pressure swing adsorber 5 is connected with the main heat exchanger 6 through a pipeline, the main heat exchanger 6 is connected with the expansion machine 10 through a pipeline, The rectifying tower 9 is connected with the condensing evaporator 7, a liquid nitrogen subcooler 8 is arranged between pipelines at two sides of the rectifying tower 9 and the condensing evaporator 7, the expansion machine 10 is connected with the silencer, and the expansion machine 10 plays a role in pressurization.
Specifically, air flows into an air compressor 1 from an air inlet pipe, oil in the air is removed through an oil remover 2, then the air flows to a pipeline filter 13, impurities in the air are subjected to primary filtering treatment and then flow to an adsorption dryer 3 and a freeze dryer 12, the adsorption dryer 3 and the freeze dryer 12 are matched with each other, the adsorption dryer 3 adsorbs water vapor, the freeze dryer 12 is cooled and drained, then the air flows to a four-stage filter 4 through a pipeline, lubricating oil, impurities and moisture carried in the air are filtered, and the service life and the adsorption effect of a carbon molecular sieve in an adsorber are improved;
according to the principle of pressure swing adsorption, under the condition that an adsorbent selectively adsorbs, impurity components such as carbon dioxide and the like in raw material gas are adsorbed in a pressurized mode, components such as nitrogen and the like which are difficult to adsorb are discharged from the top of an adsorber through an adsorption bed layer, so that the separation of a gas mixture is realized, the components circulate to a main heat exchanger 6 through a pipeline, the heat exchange is carried out in the main heat exchanger 6, the cooling of air is carried out in the main heat exchanger 6, the air is cooled to a liquefaction temperature by nitrogen and oxygen-enriched gas which are return products after rectification in the main heat exchanger 6, the gases such as nitrogen and oxygen and the like which are difficult to adsorb are rectified in a rectifying tower 9 and are finished on a sieve plate of the rectifying tower 9, when the gases pass from a tower plate to a tower plate from bottom to top, the nitrogen concentration is continuously increased, and high-purity nitrogen is obtained at the tower top;
high-purity nitrogen is discharged from the top of the rectifying tower 9, a part of the nitrogen is exchanged by the main heat exchanger and is output as product nitrogen to be supplied to users, a part of the nitrogen is cooled into liquid nitrogen in the condensing evaporator 7, one part of the liquid nitrogen is output as a liquid nitrogen product, the other part of the liquid nitrogen flows into the rectifying tower 9 as reflux liquid, the liquid obtained at the bottom of the rectifying tower 9 by heat-mass exchange with the rising vapor is called oxygen-enriched liquid air, the oxygen-enriched liquid air enters the evaporation side of the condensation evaporator 7 through a subcooler and a throttle valve to cool the nitrogen at the condensation evaporation side, the oxygen-enriched vapor enters the main heat exchanger 6 after self evaporation while condensing the nitrogen in the condensation evaporator 7, reheating in the main heat exchanger 6 to the temperature before expansion and then entering the expansion machine 10, after expansion, the low-temperature oxygen-enriched air firstly enters the subcooler and the oxygen-enriched liquid air are subcooled, then enters the main heat exchanger 6 to cool the raw material air, and is reheated to the ambient temperature and then discharged.
Wherein, the one end of minute pipeline 14 is connected on booster compressor 11, and the one end of booster compressor 11 is connected with the pipeline to on two pressure swing adsorption wares 5, trunk line 15 all is provided with the stop valve with between the minute pipeline 14.
Specifically, the pressure of the pressure swing adsorption device 5 is controlled through the supercharger 11, the adsorption pressure in the pressure swing adsorption device 5 is controlled to meet the adsorption requirement, and after the regeneration of the adsorbent is completed, the adsorption bed is pressurized by using weak adsorption components until the adsorption pressure position is reached, so that the adsorption effect is ensured to the maximum extent.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (6)
1. Device is prepared to two inflation high-purity nitrogen of single compression double pressure boost, including air compressor (1), adsorption dryer (3), pressure swing adsorber (5), main heat exchanger (6), rectifying column (9), expander (10) and booster compressor (11), its characterized in that, air compressor (1) is connected with degreaser (2) through the pipeline, degreaser (2) are connected with adsorption dryer (3) and refrigeration dryer (12) through the pipeline, adsorption dryer (3) with refrigeration dryer (12) are connected with level four filter (4) through the pipeline, level four filter (4) are connected with trunk line (15) and branch pipeline (14), and trunk line (15) are connected with pressure swing adsorber (5), pressure swing adsorber (5) are connected with main heat exchanger (6) through the pipeline, main heat exchanger (6) are through pipeline and expander (10), The rectifying tower (9) is connected with the condensing evaporator (7);
one end of the branch pipeline (14) is connected to the booster (11), and one end of the booster (11) is connected to the pipeline and connected to the two pressure swing adsorbers (5).
2. The single-compression double-pressurization double-expansion high-purity nitrogen production device as claimed in claim 1, wherein a pipeline filter (13) is installed between the oil remover (2) and the adsorption dryer (3) through pipeline connection.
3. The single-compression double-pressurization double-expansion high-purity nitrogen production device according to claim 1, wherein a stop valve is arranged between the pipelines of the two adsorption dryers (3).
4. The single-compression double-pressurization double-expansion high-purity nitrogen production device according to claim 1, wherein a stop valve is arranged between the main pipeline (15) and the branch pipeline (14).
5. The single-compression double-pressurization double-expansion high-purity nitrogen production device according to claim 1, wherein the expander (10) is connected with a muffler.
6. The single-compression double-pressurization double-expansion high-purity nitrogen preparation device according to claim 1, wherein a liquid nitrogen subcooler (8) is further arranged between the rectifying tower (9) and the pipeline on the two sides of the condensing evaporator (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122043221.5U CN216080638U (en) | 2021-08-27 | 2021-08-27 | Single-compression double-pressurization double-expansion high-purity nitrogen preparation device |
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| CN202122043221.5U CN216080638U (en) | 2021-08-27 | 2021-08-27 | Single-compression double-pressurization double-expansion high-purity nitrogen preparation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777417A (en) * | 2022-04-27 | 2022-07-22 | 宏芯气体(上海)有限公司 | Double-tower double-reboiler ultra-high purity nitrogen generator device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777417A (en) * | 2022-04-27 | 2022-07-22 | 宏芯气体(上海)有限公司 | Double-tower double-reboiler ultra-high purity nitrogen generator device |
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