CN203837410U - Single-compression double-supercharging double-expansion high purity nitrogen generating device - Google Patents

Single-compression double-supercharging double-expansion high purity nitrogen generating device Download PDF

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Publication number
CN203837410U
CN203837410U CN201420018882.XU CN201420018882U CN203837410U CN 203837410 U CN203837410 U CN 203837410U CN 201420018882 U CN201420018882 U CN 201420018882U CN 203837410 U CN203837410 U CN 203837410U
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China
Prior art keywords
nitrogen
pipeline
liquid
rectifying column
expansion
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Expired - Fee Related
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CN201420018882.XU
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Chinese (zh)
Inventor
陈崇文
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ZHEJIANG HAITIAN GAS CO Ltd
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ZHEJIANG HAITIAN GAS CO Ltd
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Abstract

The utility model belongs to the technical field of nitrogen generation, and relates to a single-compression double-supercharging double-expansion high purity nitrogen generating device. Common nitrogen generating equipment is additionally provided with two supercharged turbo expanders, an inlet pipeline and an outlet pipeline of an original supercharger are provided with an inlet valve and an outlet valve, a pipeline through which nitrogen gas and liquid nitrogen flow out of a rectifying tower is provided with a pressure regulating valve, high purity nitrogen gas obtained at the top of the rectifying tower is output after passing through a main heat exchanger or passing through the main heat exchanger and the supercharger, and the liquid nitrogen is output after high-purity liquid nitrogen passes through a liquid nitrogen subcooler. The single-compression double-supercharging double-expansion high purity nitrogen generating device has the advantages that the refrigerating capacity is controlled through two valves on a ventilation pipeline at the top of a liquid storage separation tank, generation of the liquid nitrogen can be controlled, the higher refrigerating capacity is achieved through a double-supercharging double-expansion system, redundant nitrogen gas is converted into the liquid nitrogen, adjustable generation of the nitrogen gas and the liquid nitrogen is achieved, nitrogen supercharging is driven through expansion of impure nitrogen discharged out of the tower, energy consumption is low, and the single-compression double-supercharging double-expansion high purity nitrogen generating device is suitable for low-energy-consumption generation of the nitrogen gas and the liquid nitrogen.

Description

The two expansion High Purity Nitrogen device for making of the two superchargings of single compression
Technical field
The utility model belongs to nitrogen technical field processed, refers in particular to the two expansion High Purity Nitrogen device for making of the two superchargings of a kind of single compression.
Background technology
Along with every profession and trade develop rapidlys such as electronic industry, metallurgy, medicine, chemical industry, new material industry and petrochemical industries, demand to nitrogen product is increasing, and the air separation plant of producing nitrogen is big power consumer, due to long-term operation, energy consumption is large, how can effectively reduce energy consumption most important.General way is demi-inflation at present, all the other throttlings, and the merit supercharging of decompressor output adopts blower fan braking emptying; Liquid air is only cold or only excessively cold with segment fluid flow simple heat exchange, and equipment regulates curing dumb, causes the not enough or more than needed emptying waste of product, adopts these methods and process organization, the high requirement that cannot meet user of energy consumption of air separation plant.
Summary of the invention
The purpose of this utility model is to provide the low and gas nitrogen of a kind of energy consumption, liquid nitrogen is produced the adjustable two expansion High Purity Nitrogen device for making of the two superchargings of single compression.
The purpose of this utility model is achieved in that
The two expansion High Purity Nitrogen device for making of the two superchargings of single compression, comprise the rectifying column connecting with pipeline, condenser/evaporator, booster expansion turbine, main heat exchanger, liquid air subcooler, nitrogen subcooler, on the import and export pipeline of supercharger, be provided with inlet valve and outlet valve, nitrogen and liquid nitrogen go out on rectifying column pipeline to be provided with pressure-regulating valve, described booster expansion turbine is coaxial supercharger and the decompressor connecting, a purifying air part by device for cleaning pipeline to rectifying column or through compressor A2, A3 passes to rectifying column, another part purifying air is sent into decompressor ET2 by pipeline successively, ET3 is also cooling through main heat exchanger heat exchange, wherein the pipeline on a road is connected with rectifier bottoms, the pipeline on another road behind main heat exchanger middle part or bottom more successively with decompressor ET2, storage liquid knockout drum is communicated with, liquid air in storage liquid knockout drum is sent into rectifier bottoms bottom by pipeline, gas in storage liquid knockout drum is sent into decompressor ET2 swell refrigeration by pipeline, rectifier bottoms is communicated with liquid air subcooler and condenser/evaporator top successively by pipeline, the liquid nitrogen reflux of condenser/evaporator is to the phegma of rectifying column top as rectifying column, between condenser/evaporator low-pressure side top and decompressor ET1, be provided with dirty nitrogen reflux pipeline, dirty nitrogen after decompressor ET1 re-heat is communicated with purification system by pipeline, the high pure nitrogen at rectifying column top is communicated with main heat exchanger by pipeline, by pipeline, export, or after being communicated with main heat exchanger and supercharger by pipeline, outwards exports high pure nitrogen the high pure nitrogen of different pressures by pipeline, high-purity liquid nitrogen is communicated with liquid nitrogen output channel after connecting liquid nitrogen filter by pipeline.
The high pure nitrogen of above-mentioned external output can be by first order decompressor pressurized end inlet valve, outlet valve, nitrogen rectifying column pipeline on pressure-regulating valve regulate the externally pressure of output nitrogen.
Above-mentioned purifying air can directly be sent into rectifier bottoms by the valve arranging on pipeline and pipeline after main heat exchanger heat exchange.
Above-mentioned storage liquid knockout drum top connects two valves that arrange on the branch line of rectifying column and main heat exchanger and controls refrigerating capacity, can control the production of liquid nitrogen.
The valve of above-mentioned control refrigerating capacity is: storage liquid knockout drum top breather pipe by three-way pipe respectively with the pipeline communication that enters main heat exchanger and rectifying column bottom, on the pipeline being communicated with main heat exchanger and rectifying column bottom respectively at three-way pipe, be provided with control valve.
On above-mentioned storage liquid knockout drum, rectifying column, condenser/evaporator, be provided with liquid level gauge, on the connecting pipe of described supercharger, decompressor, storage liquid knockout drum, rectifying column and condenser/evaporator, be provided with Pressure gauge.
The utility model compared to existing technology outstanding and useful technique effect is:
1, the utility model is controlled refrigerating capacity by V4, two valves of V5, can control the production of liquid nitrogen.
2, the utility model drives supercharger A1, A3 supercharging nitrogen by going out the dirty nitrogen expansion of tower, thereby reduced whole tower, presses reduction compressor pressure, then makes whole energy consumption decline.
3, the utility model adopts the two expansion ET2 of two supercharging A2, A3, ET3 systems to produce more refrigerating capacity, converts unnecessary gas nitrogen to liquid nitrogen, thereby realizes gas nitrogen, liquid nitrogen is produced adjustable object.
4, the utility model can not only meet the requirement of user's high purity nitrogen, high-purity liquid nitrogen, whole energy consumption can decline to a great extent, gas, liquid are produced simultaneously, economic benefits, flexible adjustment is reliable, the feature with maximization of economic benefit, increase the smallest investment, is applicable to the gas nitrogen of low energy consumption, the production of liquid nitrogen.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, with specific embodiment, the utility model is further described, referring to Fig. 1:
The two expansion High Purity Nitrogen device for making of the two superchargings of single compression, comprise the rectifying column C1 connecting with pipeline, condenser/evaporator K1, booster expansion turbine, main heat exchanger E1, liquid air subcooler E2, nitrogen subcooler E3, the import and export pipeline 5 of supercharger A1, on 2, be provided with inlet valve V1 and outlet valve V2, nitrogen and liquid nitrogen go out on rectifying column K1 pipeline 8 to be provided with pressure-regulating valve V3, described booster expansion turbine is coaxial supercharger and decompressor (A1 and the ET1 connecting, A2 and ET2, A3 and ET3), a part for purifying air passes to rectifying column C1 by pipeline 1 and 2 or through supercharger A2, A3 passes to rectifying column C1, another part purifying air is successively by pipeline 1, 2 send into decompressor ET2, ET3 is also cooling through main heat exchanger E1 heat exchange, the cooling rear rectifying column C1 bottom of directly sending into of a part, part air after decompressor ET2 expands is sent into storage liquid knockout drum G1, liquid air in storage liquid knockout drum G1 is sent into rectifying column C1 bottom by pipeline 12, gas in storage liquid knockout drum is sent into decompressor ET3 swell refrigeration, in rectifying column C1 bottom, obtain oxygen-enriched liquid air, after liquid air subcooler E2 and throttling, deliver to condenser/evaporator K1 top, form liquid nitrogen reflux to the phegma of rectifying column C1 top as rectifying column C1 with the heat exchange of rectifying column C1 top nitrogen, the dirty nitrogen obtaining at condenser/evaporator low-pressure side top is sent to ET1 decompressor swell refrigeration, dirty nitrogen after re-heat is sent into purification system, at rectifying column C1 top, obtain high pure nitrogen, high pure nitrogen is externally exported high pure nitrogen through piping 9 main heat exchanger E1 by piping 15, or high pure nitrogen is through piping 9, main heat exchanger E1, after pipeline 5 and supercharger A1 through high pure nitrogen output channel 3, 15 externally export the high pure nitrogen of different pressures, high-purity liquid nitrogen is externally exported liquid nitrogen by liquid nitrogen output channel 11 after liquid nitrogen subcooler E3.
The high pure nitrogen of above-mentioned external output can regulate by inlet valve V1, outlet valve V2, the pressure-regulating valve V3 on nitrogen rectifying column pipeline 8 of decompressor ET1 pressurized end the externally pressure of output nitrogen, when client needs high pressure nitrogen product, close nitrogen and go out the pressure-regulating valve V3 on rectifying column C1 pipeline, open supercharger A1 terminal valve V1, V2, nitrogen product is sent into gas transmission pipeline net work by pipeline 3,15 after pressurized end supercharging; When client needs low-pressure nitrogen product, open nitrogen and go out the pressure-regulating valve V3 on rectifying column C1 pipeline, close supercharger terminal valve V1, V2, product nitrogen gas is directly sent into gas transmission pipeline net work by pipeline 8,15.
Above-mentioned purifying air can directly be sent into rectifier bottoms by the valve arranging on pipeline and pipeline after main heat exchanger heat exchange; When decompressor fault, valve-off V10, V11, V5, open valve V12, and purifying air is sent into rectifying column C1 bottom after main heat exchanger heat exchange.
Above-mentioned storage liquid knockout drum G1 top is communicated with two valve V4, V5 on the branch line of rectifying column C1 and main heat exchanger E1, arranging and controls refrigerating capacity, can control the production of liquid nitrogen.
The valve of above-mentioned control refrigerating capacity is: storage liquid knockout drum G1 top breather pipe by three-way pipe 16,14,13 respectively with the pipeline communication that enters main heat exchanger E1 and rectifying column C1 bottom, on the pipeline being communicated with main heat exchanger E1 and rectifying column C1 bottom respectively at three-way pipe 16,14,13, be provided with control valve V4, V5; And control refrigerating capacity by two valve V5, V6, control the production of liquid nitrogen.
On above-mentioned storage liquid knockout drum G1, rectifying column C1, condenser/evaporator K1, be provided with liquid level gauge, on the connecting pipe of described supercharger A1, A2, A3, decompressor ET1, ET2, ET3, storage liquid knockout drum G1, rectifying column C1 and condenser/evaporator K1, be provided with Pressure gauge.
This device goes out the dirty nitrogen expansion supercharging nitrogen of rectifying column C1 by 10,7,4 and 16,14,6,4 pairs, pipeline, thereby the whole tower that has reduced rectifying column C1 is pressed and is reduced compressor pressure, then make whole energy consumption decline, and adopted the two expansion systems of two superchargings to produce more refrigerating capacity, convert unnecessary gas nitrogen to liquid nitrogen.
Above-described embodiment is only preferred embodiment of the present utility model, not limits according to this protection domain of the present utility model, therefore: all equivalences of doing according to structure of the present utility model, shape, principle change, within all should being covered by protection domain of the present utility model.

Claims (5)

1. list compresses the two expansion High Purity Nitrogen device for making of two superchargings, comprise the rectifying column connecting with pipeline, condenser/evaporator, booster expansion turbine, main heat exchanger, liquid air subcooler, nitrogen subcooler, it is characterized in that: on the import and export pipeline of supercharger, be provided with inlet valve and outlet valve, nitrogen and liquid nitrogen go out on rectifying column pipeline to be provided with pressure-regulating valve, described booster expansion turbine is coaxial supercharger and the decompressor connecting, a purifying air part by device for cleaning pipeline to rectifying column or through compressor A2, A3 passes to rectifying column, another part purifying air is sent into decompressor ET2 by pipeline successively, ET3 is also cooling through main heat exchanger heat exchange, wherein the pipeline on a road is communicated with rectifier bottoms, the pipeline on another road behind main heat exchanger middle part or bottom more successively with decompressor ET2, storage liquid knockout drum is communicated with, liquid air in storage liquid knockout drum is sent into rectifier bottoms by pipeline, gas in storage liquid knockout drum is sent into decompressor ET3 swell refrigeration by pipeline, rectifier bottoms is communicated with liquid air subcooler and condenser/evaporator top successively by pipeline, the liquid nitrogen reflux of condenser/evaporator is to the phegma of rectifying column top as rectifying column, between condenser/evaporator low-pressure side top and decompressor ET1, be provided with dirty nitrogen reflux pipeline, dirty nitrogen after decompressor ET1 re-heat is communicated with purification system by pipeline, the high pure nitrogen at rectifying column top is communicated with main heat exchanger by pipeline, by pipeline, export, or after being communicated with main heat exchanger and supercharger by pipeline, outwards exports high pure nitrogen the high pure nitrogen of different pressures by pipeline, high-purity liquid nitrogen is communicated with liquid nitrogen output channel after connecting liquid nitrogen filter by pipeline.
2. the two expansion High Purity Nitrogen device for making of the two superchargings of single compression according to claim 1, is characterized in that: the high pure nitrogen of described external output can go out by inlet valve, outlet valve, the nitrogen of decompressor ET1 pressurized end pressure tower control valve and regulate the externally pressure of output nitrogen.
3. the two expansion High Purity Nitrogen device for making of the two superchargings of single compression according to claim 1, is characterized in that: described purifying air can directly be sent into rectifier bottoms by the valve arranging on pipeline and pipeline after main heat exchanger heat exchange.
4. list according to claim 1 compresses the two expansion High Purity Nitrogen device for making of two superchargings, it is characterized in that: described storage liquid knockout drum top connects two valves that arrange on the branch line of rectifying column and main heat exchanger and controls refrigerating capacity, can control the production of liquid nitrogen.
5. according to the two expansion High Purity Nitrogen device for making of the two superchargings of single compression described in claim 1-4 any one, it is characterized in that: on described storage liquid knockout drum, rectifying column, condenser/evaporator, be provided with liquid level gauge, on the connecting pipe of described supercharger, decompressor, storage liquid knockout drum, rectifying column and condenser/evaporator, be provided with Pressure gauge.
CN201420018882.XU 2014-01-13 2014-01-13 Single-compression double-supercharging double-expansion high purity nitrogen generating device Expired - Fee Related CN203837410U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103776240A (en) * 2014-01-13 2014-05-07 浙江海天气体有限公司 Single-compression twin-supercharging double-expansion high-purity nitrogen preparing device
CN105413303A (en) * 2015-11-23 2016-03-23 王丽 Liquid nitrogen manometry purifying and filtering device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103776240A (en) * 2014-01-13 2014-05-07 浙江海天气体有限公司 Single-compression twin-supercharging double-expansion high-purity nitrogen preparing device
CN103776240B (en) * 2014-01-13 2016-07-06 浙江海天气体有限公司 The double; two supercharging of single compression is double; two expands High Purity Nitrogen device for making
CN105413303A (en) * 2015-11-23 2016-03-23 王丽 Liquid nitrogen manometry purifying and filtering device

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20140917

Termination date: 20180113