CN207365553U - A kind of device for producing high pure oxygen and High Purity Nitrogen - Google Patents

A kind of device for producing high pure oxygen and High Purity Nitrogen Download PDF

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Publication number
CN207365553U
CN207365553U CN201721339013.7U CN201721339013U CN207365553U CN 207365553 U CN207365553 U CN 207365553U CN 201721339013 U CN201721339013 U CN 201721339013U CN 207365553 U CN207365553 U CN 207365553U
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oxygen
tower
outlet
purity
column
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徐锋
李伟
陈琪
张金华
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SHANGHAI BAOSTEEL GAS CO Ltd
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SHANGHAI BAOSTEEL GAS CO Ltd
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Abstract

A kind of device for producing high pure oxygen and High Purity Nitrogen, including air compressor machine, chilldown system, prepurifier and ice chest;Main heat exchanger, expanding machine, subcooler, high-pressure tower, lower pressure column, domethanizing column and high-purity oxygen column are equipped with the ice chest;Prepurifier outlet divides two-way, is connected to main heat exchanger, high-pressure tower all the way;The expanded machine of another way is to main heat exchanger, then is connected to expander end, lower pressure column;High-pressure tower tower top outlet is connected to High Purity Nitrogen product supply pipeline;High-pressure tower oxygen-rich fluid outlet connection subcooler, divides two-way, is connected to lower pressure column all the way, another way is connected to domethanizing column;Lower pressure column purity nitrogen fluid outlet is connected to high-pressure tower;Demethanizer column overhead outlet connects high-purity oxygen column, and high-purity oxygen column tower reactor connects high-purity liquid oxygen product supply line.Single domethanizing column is provided with the utility model, the recovery rate of high pure oxygen, good economy performance can be improved on the basis of high-purity oxygen purity is ensured.

Description

A kind of device for producing high pure oxygen and High Purity Nitrogen
Technical field
The utility model belongs to air purification technique field, and in particular to a kind of dress for producing high pure oxygen and High Purity Nitrogen Put.
Background technology
Industrial gasses are called " blood " of industry.With the fast development of China's economic, industrial gasses are passed through as national One of basic industries key element of helping, the critical role and effect in national economy are increasingly prominent.Especially with Internet era Arrival, the industry such as electronics, polysilicon rises extensively, and the demand of the top student in industrial gasses --- high-purity gas is increasingly It is more.
As the bulk gas in high-purity gas, high purity oxygen gas and high pure nitrogen answering in industries such as electronics, polysilicons With more and more extensive, and current high pure oxygen is to be obtained from space division as byproduct production mostly, for production capacity relative requirements Deficiency, High Purity Nitrogen are then to be obtained using the method for cryogenic rectification from nitrogen-making device.
High pure oxygen and High Purity Nitrogen can be prepared at the same time by only having minimal amount of device at present, still, in these devices, not had The device of methane can be removed individually and thoroughly, during production, methane can be ignored by only extracting a few part at the middle part of rectifying column The fluid of content causes the problem of recovery rate is low when producing high pure oxygen, also, oxygen is pure as the raw material for producing high pure oxygen Degree is higher, and recovery rate is lower.
Therefore, it is not widely used.For needing the industry of the high pure oxygen of application and High Purity Nitrogen at the same time, still It is difficult to meet the requirements.
Utility model content
The purpose of this utility model is to provide a kind of device for producing high pure oxygen and High Purity Nitrogen, high pure oxygen can be prepared at the same time With two kinds of products of High Purity Nitrogen, the standard of high pure oxygen product oxygen content scope >=99.999% of acquisition, even up to ultrapure oxygen, oxygen Content range >=99.9999%, High Purity Nitrogen product nitrogen content range >=99.999% of acquisition, respectively reaches national standard《GB/ T14599 pure oxygens, high pure oxygen and ultrapure oxygen》In high pure oxygen and《GB/T8979 purity nitrogens, High Purity Nitrogen and superpure nitrogen》In High Purity Nitrogen Standard requirement.
In order to achieve the above object, the utility model provides following technical solution:
A kind of device for producing high pure oxygen and High Purity Nitrogen, including air compressor machine, chilldown system, prepurifier and ice chest;It is described Main heat exchanger, expanding machine, subcooler, liquid nitrogen pump, high-pressure tower, lower pressure column, domethanizing column and high-purity oxygen column are equipped with ice chest;Its In,
The main heat exchanger sets at least two cooling entrances and outlet, at least two re-heat entrances and outlet;The expanding machine by Supercharging and expansion two parts composition;The subcooler sets cooling entrance and outlet, re-heat entrance and outlet;At the top of the high-pressure tower Condenser is set, and tower body sets air intake and purity nitrogen fluid inlet, and tower top sets High Purity Nitrogen fluid outlet, and tower reactor sets oxygen-rich fluid and goes out Mouthful;Condenser is set at the top of the lower pressure column, tower body sets oxygen-rich fluid entrance and air intake, and tower top sets purity nitrogen fluid outlet, Tower reactor sets oxygen-rich fluid outlet;The demethanizer overhead sets condenser, and tower body sets oxygen-rich fluid entrance, tower top sets oxygen-containing stream Body exports, and tower reactor sets methane rich fluid outlet;High-purity oxygen column tower reactor sets reboiler, and tower body sets oxygen-bearing fluid entrance, tower Top sets nitrogen-containing fluid outlet, and tower reactor sets high pure oxygen fluid outlet;The high pure oxygen fluid outlet for high-purity oxygen liquid export and/or Gas vent;
The air compressor machine outlet is connected with chilldown system entrance, chilldown system outlet connection prepurifier entrance, prepurification Device export pipeline is divided into two-way, is connected to main heat exchanger cooling entrance in ice chest all the way, and high-pressure tower is connected to through cooling outlet Air intake;Another way is connected to expanding machine pressurized end in ice chest, and another drop of main heat exchanger is connected to by expanding machine pressurized end Warm entrance, then expander end is connected to by cooling outlet, lower pressure column air intake is connected to by expander end;
The high pressure column overhead High Purity Nitrogen fluid outlet line is connected to main heat exchanger re-heat entrance, then exports and connect through re-heat It is connected to High Purity Nitrogen product supply pipeline;High-pressure tower tower reactor oxygen-rich fluid export pipeline is connected to subcooler cooling entrance, subcooler Cooling export pipeline is divided into two-way, is connected to lower pressure column oxygen-rich fluid entrance all the way;Another way is connected to the oxygen-enriched of domethanizing column Fluid inlet;
The purity nitrogen fluid outlet of the low pressure column overhead is connected to the purity nitrogen fluid inlet of high-pressure tower through liquid nitrogen pump;
The oxygen-bearing fluid outlet of the demethanizer column overhead is connected to high-purity oxygen column oxygen-bearing fluid entrance;
High-purity oxygen liquid outlet of high-purity oxygen column tower reactor is connected directly to high pure oxygen product supply line;High purity oxygen gas Body outlet is connected to main heat exchanger re-heat entrance, is then connected to high pure oxygen product supply line.
Further, heater is additionally provided between the ice chest and prepurifier, the oxygen-rich fluid of the lower pressure column tower reactor goes out The nitrogen-rich stream outlet of mouth, the methane rich fluid outlet of domethanizing column tower reactor and high-purity oxygen column tower top is converged by pipeline, is connected To subcooler re-heat entrance, main heat exchanger re-heat entrance is connected to through subcooler outlet, is connected to through re-heat outlet outside ice chest Heater, then be connected with prepurifier.
Further, the high pressure column overhead High Purity Nitrogen fluid outlet line is connected to main heat exchanger re-heat entrance, through re-heat Outlet is connected to purifier, is then connected to superpure nitrogen product supply pipeline.
Preferably, the chilldown system is cooling driers, and the prepurifier is molecular sieve adsorption and purification device.
Preferably, prepurifier is composed in parallel by two molecular sieve adsorption and purification devices.
In the utility model, there is provided the domethanizing column of special removing methane, in domethanizing column, by rectifying, by height Major impurity methane in pure oxygen is individually removed.
In the utility model, for the oxygen-rich fluid obtained from high-pressure tower tower reactor, after cooling pressurization, demethanation is sent to In tower, methane is removed, after thoroughly removing methane, oxygen-bearing fluid is further purified into high-purity oxygen column, high-purity to obtain Oxygen product.
In the utility model, kept the temperature using ice chest, the oxygen-rich fluid from lower pressure column tower reactor, domethanizing column tower reactor are the richest in The nitrogen-rich stream of alkane fluid and high-purity oxygen column tower top, and the equal cocoa of High Purity Nitrogen of high pressure column overhead enter subcooler and main heat exchange Device, as the low-temperature receiver of purification air cooling-down, wherein, low pressure oxygen-rich fluid and methane rich fluid are alternatively arranged as cooling oxygen-rich fluid Low-temperature receiver, after the cold in low pressure oxygen-rich fluid and methane rich fluid is exchanged, after the heating can regenerate prepurifier, During obtaining high pure oxygen and High Purity Nitrogen, the hot and cold energy in whole preparation process is fully used, and saves the energy.
In the utility model, in the prepurifier equipped with two bridging molecules sieve adsorption and purification device, two molecular sieve adsorbers are handed over Temporary substitute is made, and a job, a heated oxygen-rich fluid and methane rich fluid are regenerated, and realization is continuously run.It is described cold Condenser refers to carry out the hot fluid risen in tower the heat-exchange apparatus that condensation produces the cold fluid declined;The reboiler refers to The heat-exchange apparatus that heating produces the hot fluid risen can be carried out to the cold fluid declined in tower.
Compared with prior art, the utility model has the advantages that:
1) the utility model is used, high pure oxygen product and nitrogen-making device system are prepared compared to traditional big space division that is respectively adopted Standby High Purity Nitrogen product, can prepare high two kinds of products of pure oxygen and High Purity Nitrogen at the same time, the equal energy of hot and cold energy in whole preparation process It is fully used, saves the energy.
2) the utility model employs the unit of special removing methane, can be improved on the basis of high-purity oxygen purity high-purity The recovery rate of oxygen, prepares high purity oxygen gas, high-purity liquid oxygen, or prepares high purity oxygen gas and high-purity liquid oxygen at the same time, high pure oxygen product shape Formula is flexible.
Brief description of the drawings
Fig. 1 is the device that the utility model produces high pure oxygen and High Purity Nitrogen.
Embodiment
Referring to Fig. 1, the utility model produces the device of high pure oxygen and High Purity Nitrogen:
Including air compressor machine 1, cooling driers 2, prepurifier 3 and ice chest 4;Main heat exchanger 41, expanding machine are equipped with the ice chest 4 43rd, subcooler 45, liquid nitrogen pump 48, high-pressure tower 42, lower pressure column 44, domethanizing column 46 and high-purity oxygen column 47;Wherein,
The main heat exchanger 41 sets two cooling entrances and outlet, at least two re-heat entrances and outlet;The expanding machine 43 by Supercharging and expansion two parts composition;The subcooler 45 sets cooling entrance and outlet, re-heat entrance and outlet;The high-pressure tower 42 Top sets condenser 421, and tower body sets air intake and purity nitrogen fluid inlet, and tower top sets High Purity Nitrogen fluid outlet, and tower reactor sets richness Oxygen fluid outlet;The top of lower pressure column 44 sets condenser 441, and tower body sets oxygen-rich fluid entrance and air intake, tower top If purity nitrogen fluid outlet, tower reactor sets oxygen-rich fluid outlet;The top of domethanizing column 46 sets condenser 461, and tower body sets oxygen-enriched Fluid inlet, tower top set oxygen-bearing fluid outlet, and tower reactor sets methane rich fluid outlet;47 tower reactor of high-purity oxygen column sets reboiler 471, tower body sets oxygen-bearing fluid entrance, and tower top sets nitrogen-rich stream outlet, and tower reactor sets high pure oxygen fluid outlet;
The outlet of air compressor machine 1 is connected with 2 entrance of cooling driers, the outlet of cooling driers 2 connection 3 entrance of prepurifier, described pre- Purifier 3 is composed in parallel by two molecular sieve adsorption and purification devices 31,31', and 3 export pipeline of prepurifier is divided into two-way, connects all the way The cooling of main heat exchanger 41 entrance in ice chest 4 is connected to, the air intake of high-pressure tower 42 is connected to through cooling outlet;Another way is connected to 43 pressurized end of expanding machine in ice chest 4, another cooling entrance of main heat exchanger 41 is connected to by 43 pressurized end of expanding machine, then by cooling down Outlet is connected to 43 expanding end of expanding machine, and 44 air intake of lower pressure column is connected to by 43 expanding end of expanding machine;
The 42 tower top High Purity Nitrogen fluid outlet line of high-pressure tower is connected to 41 re-heat entrance of main heat exchanger, then goes out through re-heat Mouth is connected to High Purity Nitrogen product supply pipeline;42 tower reactor oxygen-rich fluid export pipeline of high-pressure tower be connected to subcooler 45 cool down into Mouthful, the cooling export pipeline of subcooler 45 is divided into two-way, is connected to 44 oxygen-rich fluid entrance of lower pressure column all the way;Another way is connected to de- The oxygen-rich fluid entrance of methane tower 46;
The purity nitrogen fluid outlet of 46 tower top of lower pressure column is connected to the purity nitrogen fluid inlet of high-pressure tower 42 through liquid nitrogen pump;
The oxygen-bearing fluid outlet of 46 tower top of domethanizing column is connected to high 47 tower oxygen-bearing fluid entrance of pure oxygen, high-purity oxygen column The high pure oxygen fluid outlet of 47 tower reactors is connected to high-purity liquid oxygen product supply line.
Heater 5 is additionally provided between the ice chest 4 and prepurifier 3, the oxygen-rich fluid outlet of the lower pressure column tower reactor, take off The outlet of the nitrogen-containing fluid of the methane rich fluid outlet of 46 tower reactor of methane tower and high-purity oxygen column tower top is converged by pipeline, is connected to 45 re-heat entrance of cooler, is connected to 41 re-heat entrance of main heat exchanger through the outlet of subcooler 45, is connected to through re-heat outlet outside ice chest 4 Heater 5, then be connected with prepurifier 3.
Further, 41 re-heat of the main heat exchanger outlet connection purifier 6.
Production process is as follows:
Raw air enters air compressor machine 1, enters through 1 multi-stage compression of air compressor machine to 10.5barg, and after being cooled to 40 DEG C cold Dry machine 2, the air after cooling driers 2 are cooled to 12 DEG C enter prepurifier 3, and moisture, CO in air are fallen in absorption2And carbon atom Hydrocarbon of the number more than 3.In purification air after processing, content≤1ppm of water, carbon dioxide content≤1ppm, its In, in the prepurifier 3, two molecular sieve adsorbers 31,31 ' in parallel work alternatively:One work, one heated Dirty nitrogen regeneration.
Purified air is divided into two strands after entering ice chest 4, one purification air for accounting for purification volume of air 85% passes through Main heat exchanger 41, which is cooled to after -163 DEG C, to be entered high-pressure tower 42 and carries out rectifying, the operating pressure of high-pressure tower 42 for 9.9~ 10.3barg, operation temperature are -168~-163 DEG C, and theoretical cam curve is 75 pieces, obtains nitrogen in tower top after rectifying, then pass through It is used as high pure nitrogen product after 41 re-heat of main heat exchanger to room temperature, its purity meets the standard of High Purity Nitrogen, nitrogen content scope >= 99.999%;Residue purification air goes the pressurized end of expanding machine 43 to be compressed, and enters main heat exchanger after being compressed to 13.5barg 31 are cooled down, and expanding machine 43 is entered back into after being cooled to -120 DEG C and is expanded, and are expanded to after 2.8barg with entering lower pressure column 44 Rectifying is carried out, the operating pressure of lower pressure column 44 is 2.4~2.7barg, and operation temperature is -184~-177 DEG C, and theoretical cam curve is 55 pieces;Oxygen-rich fluid is obtained in the tower reactor of high-pressure tower 42 after subcooler 45 is crossed and is cooled to -167 DEG C to be divided into two strands and throttle, The throttling of one oxygen-rich fluid (account for total oxygen-rich fluid 80%) enters lower pressure column 44 to 2.8barg and participates in rectifying, another burst of richness Oxygen fluid (account for total oxygen-rich fluid 20%) throttling enters domethanizing column 46 to 4.6barg and carries out rectifying, domethanizing column 46 Operating pressure is 4.5~4.7barg, and operation temperature is -172 DEG C~-177 DEG C, and theoretical cam curve is 20 pieces;In 44 tower of lower pressure column Push up obtained purity nitrogen fluid and enter the participation rectifying of high-pressure tower 42 after liquid nitrogen pump 48 is forced into 10barg.
Oxygen-rich fluid enters after domethanizing column 46 removes methane discharges from tower top, and high-purity oxygen is entered after throttling to 0.5barg Tower 47 carries out rectifying, and the operating pressure of high-purity oxygen column 47 is 0.4~0.8barg, and operation temperature is -148 DEG C~-180 DEG C, theoretical The number of plates is 60 pieces, and high pure oxygen product is obtained in tower reactor after rectifying, its purity meets the standard of high pure oxygen, oxygen content scope >= 99.999%, the recovery rate of high pure oxygen is 27%.
Methane-rich liquid, 47 tower of high-purity oxygen column that the oxygen-rich fluid that 44 tower reactor of lower pressure column obtains is obtained with 46 tower reactor of domethanizing column Obtained nitrogen-rich stream is pushed up together by subcooler 45,41 re-heat of main heat exchanger to room temperature heel row cooling box 4.
Further, discharge ice chest 4 and oxygen-rich fluid through ice chest outside heater 5, be then connected to prepurifier 3.
Also, the high pure nitrogen product of acquisition is further purified by purifier 6, ultrapure nitrogen, nitrogen content scope are obtained >=99.9999%.

Claims (6)

  1. A kind of 1. device for producing high pure oxygen and High Purity Nitrogen, it is characterised in that including air compressor machine, chilldown system, prepurifier and Ice chest;
    Main heat exchanger, expanding machine, subcooler, liquid nitrogen pump, high-pressure tower, lower pressure column, domethanizing column and high-purity are equipped with the ice chest Oxygen column;Wherein,
    The main heat exchanger sets at least two cooling entrances and outlet, at least two re-heat entrances and outlet;
    The expanding machine is formed by being pressurized and expanding two parts;
    The subcooler sets cooling entrance and outlet, re-heat entrance and outlet;
    Condenser is set at the top of the high-pressure tower, and tower body sets air intake and purity nitrogen fluid inlet, and tower top sets High Purity Nitrogen fluid and goes out Mouthful, tower reactor sets oxygen-rich fluid outlet;
    Condenser is set at the top of the lower pressure column, tower body sets oxygen-rich fluid entrance and air intake, and tower top sets purity nitrogen fluid outlet, Tower reactor sets oxygen-rich fluid outlet;
    The demethanizer overhead sets condenser, and tower body sets oxygen-rich fluid entrance, tower top sets oxygen-bearing fluid outlet, and tower reactor sets richness Methane stream exports;
    High-purity oxygen column tower reactor sets reboiler, and tower body sets oxygen-bearing fluid entrance, and tower top sets nitrogen-containing fluid outlet, and tower reactor sets height Pure oxygen fluid outlet;The high pure oxygen fluid outlet is exported for high-purity oxygen liquid and/or gas vent;
    The air compressor machine outlet is connected with chilldown system entrance, and chilldown system outlet connection prepurifier entrance, prepurifier goes out Mouth pipeline is divided into two-way, is connected to main heat exchanger cooling entrance in ice chest all the way, and the air of high-pressure tower is connected to through cooling outlet Entrance;Another way is connected to expanding machine pressurized end in ice chest, by expanding machine pressurized end be connected to main heat exchanger it is another cool down into Mouthful, then expander end is connected to by cooling outlet, lower pressure column air intake is connected to by expander end;
    The high pressure column overhead High Purity Nitrogen fluid outlet line is connected to main heat exchanger re-heat entrance, then is connected to through re-heat outlet High Purity Nitrogen product supply pipeline;High-pressure tower tower reactor oxygen-rich fluid export pipeline is connected to subcooler cooling entrance, subcooler cooling Export pipeline is divided into two-way, is connected to lower pressure column oxygen-rich fluid entrance all the way;Another way is connected to the oxygen-rich fluid of domethanizing column Entrance;
    The purity nitrogen fluid outlet of the low pressure column overhead is connected to the purity nitrogen fluid inlet of high-pressure tower through liquid nitrogen pump;
    The oxygen-bearing fluid outlet of the demethanizer column overhead is connected to high-purity oxygen column oxygen-bearing fluid entrance;
    High-purity oxygen liquid outlet of high-purity oxygen column tower reactor is connected directly to high pure oxygen product supply line;High purity oxygen gas body goes out Mouth is connected to main heat exchanger re-heat entrance, is then connected to high pure oxygen product supply line.
  2. 2. the device of high pure oxygen and High Purity Nitrogen is produced according to claim 1, it is characterised in that the ice chest and prepurifier Between be additionally provided with heater, the oxygen-rich fluid outlet of the lower pressure column tower reactor, the methane rich fluid outlet of domethanizing column tower reactor and The nitrogen-rich stream outlet of high-purity oxygen column tower top is converged by pipeline, is connected to subcooler re-heat entrance, is exported and connect through subcooler To main heat exchanger re-heat entrance, the heater being connected to through re-heat outlet outside ice chest, then be connected with prepurifier.
  3. 3. the device of high pure oxygen and High Purity Nitrogen is produced according to claim 1, it is characterised in that the high pressure column overhead is high-purity Nitrogen fluid outlet line is connected to main heat exchanger re-heat entrance, is connected to purifier through re-heat outlet, is then connected to High Purity Nitrogen production Product supply line.
  4. 4. the device of high pure oxygen and High Purity Nitrogen is produced according to claim 1, it is characterised in that the chilldown system is cold dry Machine.
  5. 5. the device of high pure oxygen and High Purity Nitrogen is produced according to claim 1, it is characterised in that the prepurifier is molecule Sieve adsorption and purification device.
  6. 6. the device of high pure oxygen and High Purity Nitrogen is produced according to claim 1, it is characterised in that the prepurifier is by two Molecular sieve adsorption and purification device composes in parallel.
CN201721339013.7U 2017-10-18 2017-10-18 A kind of device for producing high pure oxygen and High Purity Nitrogen Active CN207365553U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201721339013.7U CN207365553U (en) 2017-10-18 2017-10-18 A kind of device for producing high pure oxygen and High Purity Nitrogen

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110553466A (en) * 2018-05-31 2019-12-10 气体产品与化学公司 Method and apparatus for separating air using a split heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110553466A (en) * 2018-05-31 2019-12-10 气体产品与化学公司 Method and apparatus for separating air using a split heat exchanger
CN110553466B (en) * 2018-05-31 2021-08-06 气体产品与化学公司 Method and apparatus for separating air using a split heat exchanger

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