CN213679833U

CN213679833U - Air nitrogen making device with oil removing function

Info

Publication number: CN213679833U
Application number: CN202022119410.1U
Authority: CN
Inventors: 张传科; 金曼; 孙宝志; 郑建刚; 高理通
Original assignee: Shandong Weijiao Holdings Group Xuecheng Energy Co ltd
Current assignee: Shandong Weijiao Holdings Group Xuecheng Energy Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-13
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses an air system nitrogen device with deoiling function, including air compressor unit, low temperature water heat exchanger, vapour and liquid separator, air buffer tank, drying unit, degreaser, system nitrogen unit, compressed air pipe network, instrument air pipe network, nitrogen gas pipe network, the export of air compressor unit is connected with low temperature water heat exchanger's shell import, low temperature water heat exchanger's shell export is connected with the import of vapour and liquid separator below, vapour and liquid separator's top export is connected with the lower part import of air buffer tank. In the utility model, the structure adsorbs the trace lubricating oil in the air at the outlet of the front-end air compressor, thereby reducing the possibility that the carbon molecular sieve is polluted by the lubricating oil, ensuring the adsorption capacity and further improving the purity and the output of nitrogen; the filling activated carbon filler arranged in the oil remover can be regenerated for multiple times after being adsorbed and saturated, so that the activated carbon can be recycled, and the cost for replacing the activated carbon is saved.

Description

Air nitrogen making device with oil removing function

Technical Field

The utility model relates to an air separation technical field especially relates to an air system nitrogen device with deoiling function.

Background

In the chemical production process, a large amount of instrument air and nitrogen are often needed for purging, replacement, instrument driving and the like, so that the air compressor has more wide application, and in the existing air compressor unit, a carbon molecular sieve with a certain ton of filler is filled in an adsorption cylinder of the nitrogen making unit, so that the value is higher, but the carbon molecular sieve is easily polluted by lubricating oil due to the fact that trace lubricating oil is contained in air at the outlet of the front-end air compressor unit, the adsorption capacity is reduced, and the nitrogen purity and the nitrogen output are further influenced. The purity of nitrogen used by chemical enterprises is generally higher, and if the carbon molecular sieve is poisoned, the nitrogen purity is reduced, and the cost for replacing the filler is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an air nitrogen making device with an oil removing function.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an air nitrogen generator with deoiling function, includes air compressor unit, low temperature water heat exchanger, vapour and liquid separator, air buffer tank, drying unit, degreaser, nitrogen generator, compressed air pipe network, instrument air pipe network, nitrogen gas pipe network.

The export of air compressor unit is connected with the shell import of low temperature water heat exchanger, the shell export of low temperature water heat exchanger is connected with the import of vapour and liquid separator below, the top export of vapour and liquid separator is connected with the lower part import of air buffer tank, the top export of air buffer tank is connected with the bottom import and the compressed air pipe network of drying unit respectively, the export of drying unit is connected and the instrument air pipe network with the bottom import of degreaser respectively, the export of degreaser is connected with the import of nitrogen generator unit, the export of nitrogen generator unit is connected with the nitrogen gas pipe network.

As a further description of the above technical solution:

and the inlet and the outlet of the pipe layer of the low-temperature water heat exchanger are in butt joint with the cold water pipeline.

As a further description of the above technical solution:

and a sewage discharge pipeline and a valve are arranged at the bottom of the gas-liquid separator.

As a further description of the above technical solution:

and a sewage discharge pipeline is arranged and connected at the position where the outlet of the drying unit is connected with the bottom inlet of the oil remover.

As a further description of the above technical solution:

the outlet of the oil remover is simultaneously connected with a low-pressure saturated steam pipeline, a sewage discharge pipeline and an oil remover sewage discharge valve arranged on the sewage discharge pipeline, and the low-pressure saturated steam pipeline is provided with a low-pressure saturated inlet valve.

As a further description of the above technical solution:

and the front pipeline and the rear pipeline of the oil eliminator are respectively provided with an oil eliminator inlet valve and an oil eliminator outlet valve, and the oil eliminator is connected with a bypass pipeline and an oil eliminator bypass valve on the bypass pipeline.

The utility model discloses following beneficial effect has:

this air nitrogen generator with deoiling function: 1. the air outlet of the front-end air compressor is adsorbed by the structure, trace lubricating oil is contained in the air, the possibility that the carbon molecular sieve is polluted by the lubricating oil is reduced, the adsorption capacity is ensured, and the nitrogen purity and the output quantity are further improved.

2. The filling activated carbon filler arranged in the oil remover can be regenerated for multiple times after being adsorbed and saturated, so that the activated carbon can be recycled, and the cost for replacing the activated carbon is saved.

Drawings

Fig. 1 is a schematic structural diagram of an air nitrogen generator with oil removal function according to the present invention.

Illustration of the drawings:

1. an air compressor unit; 2. a low temperature water heat exchanger; 3. a gas-liquid separator; 4. an air buffer tank; 5. a drying unit; 6. an oil remover; 7. a nitrogen making unit; 8. a compressed air pipe network; 9. an instrument air pipe network; 10. a nitrogen pipe network; 11. an oil expeller inlet valve; 12. an oil separator outlet valve; 13. a deoiler bypass valve; 14. a low pressure saturation inlet valve; 15. a blow-down valve of an oil remover.

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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present invention provides an embodiment: an air nitrogen making device with oil removing function comprises an air compressor unit 1, a low-temperature water heat exchanger 2, a gas-liquid separator 3, an air buffer tank 4, a drying unit 5, an oil remover 6, a nitrogen making unit 7, a compressed air pipe network 8, an instrument air pipe network 9, a nitrogen pipe network 10, wherein an outlet of the air compressor unit 1 is connected with a shell inlet of the low-temperature water heat exchanger 2, a shell outlet of the low-temperature water heat exchanger 2 is connected with an inlet below the gas-liquid separator 3, a top outlet of the gas-liquid separator 3 is connected with a lower inlet of the air buffer tank 4, a top outlet of the air buffer tank 4 is respectively connected with a bottom inlet of the drying unit 5 and the compressed air pipe network 8, an outlet of the drying unit 5 is respectively connected with a bottom inlet of the oil remover 6 and the instrument air pipe network 9, an outlet of the oil remover 6 is connected with an inlet of the nitrogen, the outlet of the nitrogen generating unit 7 is connected with a nitrogen pipe network 10.

The inlet and the outlet of the pipe layer of the low-temperature water heat exchanger 2 are in butt joint with the cold water pipeline, so that the low-temperature water heat exchanger 2 can be ensured to perform stable heat exchange work, and the whole structure can be ensured to stably operate; a sewage pipeline and a valve are arranged at the bottom of the gas-liquid separator 3 and can be used for separating and discharging moisture in the air to reduce the water dew point; a sewage discharge pipeline is arranged and connected at the position where the outlet of the drying unit 5 is connected with the bottom inlet of the oil remover 6, so that sewage discharge work can be conveniently carried out; the outlet of the oil remover 6 is simultaneously connected with a low-pressure saturated steam pipeline, a sewage discharge pipeline and an oil remover sewage discharge valve 15 arranged on the sewage discharge pipeline, the low-pressure saturated steam pipeline is provided with a low-pressure saturated inlet valve 14, and the steam pipeline and the sewage discharge pipeline can assist in the regeneration work of the active carbon filler of the oil remover 6; the front pipeline and the rear pipeline of the oil eliminator 6 are respectively provided with an oil eliminator inlet valve 11 and an oil eliminator outlet valve 12, the oil eliminator 6 is connected with a bypass pipeline and an oil eliminator bypass valve 13 on the bypass pipeline, and the regeneration work of the active carbon filler in the oil eliminator 6 can be carried out through the matching arrangement of the structure.

The working principle is as follows: when the air nitrogen-making device with the oil removal function is used, 1) air is compressed and pressurized to 1.0MPa by a parallel air compressor in an air compressor unit 1, then the temperature of the air is reduced to 20 ℃ by a low-temperature water heat exchanger 2, and the air is output;

2) the air cooled at normal temperature enters a gas-liquid separator 3 to separate liquid water. Discharging the water from the bottom, and sending the gas phase from the top;

3) after the water-separating normal-temperature air enters the air buffer tank 4, one part of the water-separating normal-temperature air is merged into the compressed air pipe network 8 for pipeline purging and pressurizing, and the other part of the water-separating normal-temperature air enters the drying unit 5 for further removing the water in the compressed air and adsorbing impurities therein, wherein the water dew point is less than or equal to minus 45 ℃;

4) after the water dew point of the air out of the drying unit 5 is qualified, one part of the air is merged into an instrument air pipe network 9 for all instrument equipment in a plant area, the other part of the air enters an oil remover 6 from bottom to top to adsorb lubricating oil in compressed air, and the oil content of outlet gas is less than or equal to 0.001 ppm;

5) the compressed air after deoiling enters a nitrogen making unit 7 for nitrogen separation, and is merged into a nitrogen pipe network 10 after the purity is more than or equal to 99.9 percent;

6) after the filler of the oil remover 6 is adsorbed and saturated, the system can be cut out, and the countercurrent regeneration is carried out from top to bottom by using low-pressure saturated steam (0.6 Mpa, 190 ℃);

a regeneration operation step:

1) opening a by-pass valve 13 of the oil remover, closing an inlet valve 11 and an outlet valve 12 of the oil remover, and cutting the oil remover 6 into a system;

2) slightly opening a low-pressure saturation inlet valve 14, preheating the pipeline and discharging condensate;

3) opening a drain valve 15 of the oil remover and a low-pressure saturation inlet valve 14, introducing steam into the oil remover 6, and regenerating the filler (the regeneration time is determined according to specific conditions);

4) after regeneration is finished, closing the low-pressure saturation inlet valve 14, opening the oil remover outlet valve 12, and introducing air for cold blowing and cooling;

5) after the temperature is reduced to normal temperature, the drain valve 15 of the oil remover is closed, the inlet valve 11 of the oil remover is opened, and finally the bypass valve 13 of the oil remover is closed to be put into the system.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides an air nitrogen making device with deoiling function, includes air compressor unit (1), low temperature water heat exchanger (2), vapour and liquid separator (3), air buffer tank (4), dry unit (5), degreaser (6), nitrogen making unit (7), compressed air pipe network (8), instrument air pipe network (9), nitrogen gas pipe network (10), its characterized in that:

the export of air compressor unit (1) is connected with the shell import of low temperature water heat exchanger (2), the shell export of low temperature water heat exchanger (2) is connected with the import of vapour and liquid separator (3) below, the top export of vapour and liquid separator (3) is connected with the lower part import of air buffer tank (4), the top export of air buffer tank (4) is connected with the bottom import and compressed air pipe network (8) of drying unit (5) respectively, the export of drying unit (5) is connected with the bottom import of degreaser (6) respectively and instrument air pipe network (9) is connected, the export of degreaser (6) is connected with the import of nitrogen generator unit (7), the export of nitrogen generator unit (7) is connected with nitrogen gas pipe network (10).

2. The air nitrogen making device with oil removing function according to claim 1, characterized in that: and the inlet and the outlet of the pipe layer of the low-temperature water heat exchanger (2) are in butt joint with a cold water pipeline.

3. The air nitrogen making device with oil removing function according to claim 1, characterized in that: and a sewage discharge pipeline and a valve are arranged at the bottom of the gas-liquid separator (3).

4. The air nitrogen making device with oil removing function according to claim 1, characterized in that: and a sewage discharge pipeline is arranged and connected at the position where the outlet of the drying unit (5) is connected with the bottom inlet of the oil remover (6).

5. The air nitrogen making device with oil removing function according to claim 1, characterized in that: the outlet of the oil remover (6) is simultaneously connected with a low-pressure saturated steam pipeline, a sewage discharge pipeline and an oil remover sewage discharge valve (15) arranged on the sewage discharge pipeline, and the low-pressure saturated steam pipeline is provided with a low-pressure saturated inlet valve (14).

6. The air nitrogen making device with oil removing function according to claim 1, characterized in that: and the front pipeline and the rear pipeline of the oil eliminator (6) are respectively provided with an oil eliminator inlet valve (11) and an oil eliminator outlet valve (12), and the oil eliminator (6) is connected with a bypass pipeline and an oil eliminator bypass valve (13) on the bypass pipeline.