CN206176890U - Compression air separation device in low energy consumption - Google Patents

Compression air separation device in low energy consumption Download PDF

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Publication number
CN206176890U
CN206176890U CN201620904821.2U CN201620904821U CN206176890U CN 206176890 U CN206176890 U CN 206176890U CN 201620904821 U CN201620904821 U CN 201620904821U CN 206176890 U CN206176890 U CN 206176890U
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tower
heat exchanger
air
nitrogen
pipe
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CN201620904821.2U
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Inventor
步雪寒
韦霆
侯新刚
彭荣梅
郭磊
胡莉丽
张永
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Zhejiang Zhihai Chemical Equipment Engineering Co Ltd
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Zhejiang Zhihai Chemical Equipment Engineering Co Ltd
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Abstract

The utility model provides a compression air separation device in low energy consumption, it is mainly by self -cleaning air filter, the air compressor machine, molecular sieve purifier, the heat exchanger, cryogenic rectification column and connecting tube are constituteed, be provided with raw materials air suction mouth before the self -cleaning air filter, self -cleaning air filter meets in air compressor machine and air cooling tower at the back, the back of air cooling tower meets and has molecular sieve purifier, it has two way air connection to meet at the back at molecular sieve purifier, and all the way air connection connects and continues pressure boost, another way air connection lug connection in plate heat exchanger in air booster to the air to the lower column of connecting cryogenic rectification column after meeting out plate heat exchanger, cryogenic rectification column's lower column top is provided with pressure nitrogen gas and connects the exit tube, and this pressure nitrogen gas connects out the union coupling behind plate heat exchanger, connects through this plate heat exchanger and holds in the quick -witted pressure boost of a nitrogen expansion, from this pressure boost end relinking plate heat exchanger, therefrom connects in nitrogen expansion quick -witted expansion end after the indirect play, connects once more in plate heat exchanger after this expansion end connects out to insert the pipe and press nitrogen gas behind the body of the cold flow through this plate heat exchanger heat transfer runner, it have the energy consumption low, energy -conserving, enlarge characteristics that emission reduction effect is good.

Description

Compression air separation device in low energy consumption
Technical field
The utility model is related to compression air separation device in a kind of low energy consumption, it is adaptable to the separation of air, belongs to cryogenic air separation Technical field.
Background technology
Current world economy is developed rapidly with scientific and technological progress, and all trades and professions are big steel, big all to maximization equipment Development Chemical fertilizer, big petrochemical industry, big chemical fibre, big ethene, big aromatic hydrocarbons, greatly great oil refining, generating work, big electronics, big note nitrogen oil recovery, big coal gas
Change, big Coal Chemical Industry etc., they are required for large-scale, ultra-large type air separation plant to service for it;Such Large Air Separation Devices Device can only be certainly that Deep Cooling Method continues to monopolize the world, and all commonly use the dress of the Internal-compression flow space division with supercharger Put.Interior compression is to use pump pressure contracting cryogenic liquid liquid oxygen or liquid nitrogen, then is delivered to outside device Jing after re-heat, gasification, comparatively oxygen Interior compression is safer, and especially the high pressure in maximization equipment field, big flow advantage are more prominent.
Air separation industry belongs to highly energy-consuming trade, and space division factory belongs to big power consumer, and the raw material of air separation plant is air, and it is mainly consumed Be the energy, energy resource consumption accounts for production cost.With the constantly improve of market economy, the energy efficiency of air separation plant is more next More it is taken seriously;Reduce production cost major measure be exactly reducing energy consumption, it is energy-saving be enterprise security environmental protection, increase the benefit, The importance invigorated.
The content of the invention
The purpose of this utility model is to overcome the shortcomings of that prior art is present, and offer one kind can be in like products parameter Decline the comprehensive specific energy consumption of low latitude subset, reduce production cost, energy-conservation, reduction of discharging, environment protecting are good, can effectively improve life Produce efficiency and economic benefit, compression air separation device and flow process in low energy consumption.
The purpose of this utility model by following technical solution completing, compression air separation device in a kind of low energy consumption, It is mainly by self-cleaning air filter, air compressor machine, molecular sieve purifier, heat exchanger, low-temperature fractionating tower and connecting pipe group Into, raw air suction inlet is provided with before the self-cleaning air filter, pneumatics is connected on behind self-cleaning air filter Machine and air cooling tower, behind the air cooling tower molecular sieve purifier is connected to;
Two-way air connecting tube is connected to behind molecular sieve purifier, all the way air connecting tube is connected to air booster Air is continued to be pressurized, another road air connecting tube is directly connected in plate type heat exchanger, and connects after plate type heat exchanger is picked out The lower tower of low-temperature fractionating tower;Described air booster picks out rear bifurcated and goes out two pipelines, a pipeline connecting plate type heat exchanger, And the expanding end of booster expansion turbine is connected to after picking out from the middle part of plate type heat exchanger, it is directly connected to low temperature after the expanding end The lower tower of rectifying column;Another pipeline connects the pressurized end of booster expansion turbine, and in the pressurized end pipeline connecting plate is passed behind Formula heat exchanger, picks out the lower tower for connecting low-temperature fractionating tower after plate type heat exchanger after a choke valve;
Described low-temperature fractionating tower is made up of the main condenser evaporimeter of Shang Ta and lower tower and centre, is respectively provided with Xia Ta Pipe, pure liquid nitrogen pick out pipe and liquid nitrogen fraction picks out pipe to have liquid air to pick out, and the liquid air picks out pipe, pure liquid nitrogen and picks out manages and liquid nitrogen fraction connects Outlet pipe is in the outer upper tower that low-temperature fractionating tower is connected to after a subcooler of tower, and the bottom of towe in upper tower is provided with liquid oxygen and picks out Pipe, plate type heat exchanger is accessed Jing after liquid oxygen pump, to be picked out access after plate type heat exchanger oxygen hose net or separately pick out liquid oxygen and is in charge of, and is passed through Connect liquid oxygen storage tank after subcooler;
The lower top of tower of the low-temperature fractionating tower is provided with pressure nitrogen gas and picks out pipe, and the pressure nitrogen gas pick out pipe and are connected to plate After formula heat exchanger, the pressurized end of a nitrogen expansion machine is connected to through the plate type heat exchanger, from the pressurized end board-like changing is reconnected Hot device, therefrom between pick out after be connected to the expanding end of nitrogen expansion machine, the expanding end is re-connected to plate type heat exchanger after picking out, And access tube presses nitrogen after cold flow body heat exchange runner through the plate type heat exchanger, to space division offer cold.
As preferred:The pressurized end of the nitrogen expansion machine is tapped out and be pressurized all the way nitrogen pipeline, the supercharging nitrogen tube Road is used as output pressure nitrogen product output pipe;
The lower top of tower of low-temperature fractionating tower is provided with liquid nitrogen and picks out pipe, through connecting subcooler liquid nitrogen product storage is connected to Groove;
Argon fraction extraction opening is provided with the middle part of the upper tower of low-temperature fractionating tower, the argon fraction extraction opening accesses thick by pipe Argon column, is provided with thick liquid argon extraction opening on crude argon column, the thick liquid argon extraction opening is connected in succession pure argon column middle part by pipe, and pure The tower bottom of argon column is provided with pure liquid argon and picks out pipeline.
The upper tower top of low-temperature fractionating tower is provided with dirty nitrogen and picks out pipe, after connection subcooler and plate type heat exchanger It is divided into two-way, a pipeline is connected to the heater of molecular sieve purifier, and another road connects water-cooling tower;
The upper top of tower of low-temperature fractionating tower is provided with normal pressure nitrogen extraction opening, takes over cooler in succession through pipe and board-like changes Pick out after hot device to reserved nitrogen product pipeline, or connection user's Nitrogen pipe network, or connection water-cooling tower.
The utility model is a kind of space division new technological process, and this flow process removes air expander system, while extracting pressure from lower tower Power nitrogen sends into nitrogen expansion supercharger Jing after heat exchanger re-heat and provides space division institute chilling requirement;Simultaneously 8 kilograms or so can be provided Nitrogen is used for downstream;Major advantage is the production potential that make use of rectifying column, effectively reduces energy consumption, compares conventional space division, Energy consumption saves 5%-10%.More rich product structure is provided simultaneously, reduces the device configuration in downstream.
The utility model has low energy consumption, energy-conservation, synergy, the characteristics of emission reduction effect is good;Air separation plant can be efficiently reduced Overall investment, improve production efficiency reduces production cost, effectively raises economic benefit, is conducive to environmental protection.
Description of the drawings
Fig. 1 is structure composition schematic flow sheet of the present utility model.
Specific embodiment
The utility model is described in detail below in conjunction with accompanying drawing:Shown in Fig. 1, one kind described in the utility model is low Compression air separation device in energy consumption, it is mainly by self-cleaning air filter 1, air compressor machine 2, molecular sieve purifier 3, plate type heat exchanger 4, low-temperature fractionating tower 5 and connecting pipe are constituted, and raw air suction inlet 6 is provided with before the self-cleaning air filter 1, from Clean formula air cleaner 1 is connected on air compressor machine 2 and air cooling tower 7 below, and behind the air cooling tower 7 molecular sieve purifier is connected to 3;
Raw air is sucked from suction inlet 6, and Jing self-cleaning air filters 1 are except dust and other mechanical admixtures.Filter Air afterwards enters centrifugal air compressor 2, and the cooling cleaning of air cooling compressor 7 is entered Jing after compressor 2 compresses;Jing air cooling towers 7 are cold But the air after enters the molecular sieve purifier 3 that switching is used, and the carbon dioxide, acetylene and moisture in air is adsorbed;Molecule Sieve purifier 3 is used for two switchings, wherein during a job, another regeneration.
Two-way air connecting tube is connected to behind molecular sieve purifier 3, all the way air connecting tube 8 is connected to supercharging air Machine 9 continues to be pressurized to air, and another road air connecting tube 10 is directly connected in plate type heat exchanger 4, and is picking out plate type heat exchanger 4 Connect the lower tower 51 of low-temperature fractionating tower 5 afterwards;Described air booster 9 picks out rear bifurcated and goes out two pipelines, and a pipeline 11 connects Connect plate type heat exchanger 4, and the expanding end 12 of booster expansion turbine is connected to after picking out from the middle part of plate type heat exchanger 4, this is swollen The lower tower 51 of low-temperature fractionating tower 5 is directly connected to behind swollen end 12;Another pipeline 13 connects the pressurized end 14 of booster expansion turbine, The pressurized end 14 passes behind pipeline connecting plate type heat exchanger 4, to pick out and connect low temperature after a choke valve after plate type heat exchanger 4 The lower tower 51 of rectifying column 5;
Described low-temperature fractionating tower 5 is made up of the main condenser evaporimeter 53 of upper tower 52 and lower tower 51 and centre, in Xia Ta 51 are respectively arranged with liquid air picks out that pipe 15, pure liquid nitrogen pick out pipe 16 and liquid nitrogen fraction picks out pipe 17, and the liquid air picks out pipe 15, pure liquid Nitrogen picks out pipe 16 and liquid nitrogen fraction picks out pipe 17 in the outer upper tower 52 that low-temperature fractionating tower 5 is connected to after a subcooler 18 of tower, and The bottom of towe of upper tower 52 is provided with liquid oxygen and picks out pipe 19, plate type heat exchanger 4 is accessed Jing after liquid oxygen pump 20, pick out plate type heat exchanger 4 Oxygen hose net 21 being accessed afterwards or liquid oxygen is separately picked out and being in charge of, liquid oxygen storage tank is connected after subcooler;
The top of lower tower 51 of the low-temperature fractionating tower 5 is provided with pressure nitrogen gas and picks out pipe 22, and the pressure nitrogen gas pick out pipe 22 After being connected to plate type heat exchanger 4, the pressurized end 23 of a nitrogen expansion machine is connected to through the plate type heat exchanger 4, from the pressurized end 23 reconnect plate type heat exchangers 4, therefrom between pick out after be connected to the expanding end 24 of nitrogen expansion machine, the expanding end 24 pick out after again It is secondary to be connected to plate type heat exchanger 4, and through the plate type heat exchanger 4, provide the cold flow body heat exchange runner of cold to space division after Access tube presses nitrogen net.
The pressurized end 23 of nitrogen expansion machine described in the utility model is tapped out supercharging nitrogen pipeline 25 all the way, the pressurized nitrogen Air pipe 25 is used as output pressure nitrogen product output pipe;
The top of lower tower 51 of low-temperature fractionating tower 5 is provided with liquid nitrogen and picks out pipe 26, through connecting subcooler 18 liquid is connected to Nitrogen product storage tank;
The middle part of upper tower 52 of low-temperature fractionating tower 5 is provided with argon fraction extraction opening 27, the argon fraction extraction opening 27 is by pipe Crude argon column 28 is accessed, thick liquid argon extraction opening 29 is provided with crude argon column 28, the thick liquid argon extraction opening 29 is connected in succession by pipe The middle part of pure argon column 30, and the tower bottom in pure argon column 30 is provided with pure liquid argon and picks out pipeline 31.
The top of upper tower 52 of low-temperature fractionating tower 5 is provided with dirty nitrogen and picks out pipe 32, through connecting subcooler 18 and board-like It is divided into two-way after heat exchanger 4,33 is connected to the heater of molecular sieve purifier 3, the connection of another road 34 air cooling tower 7 all the way;
The top of upper tower 52 of low-temperature fractionating tower 5 is provided with normal pressure nitrogen extraction opening, through pipe cooler and plate are taken in succession Pick out after formula heat exchanger to reserved nitrogen product pipeline, or connection user's Nitrogen pipe network, or connection air cooling tower 7.
The course of work of the present utility model is:The air being pressurized by supercharger is divided into two parts after being cooled, and a part is entered Enter and extract the expanding end of feeding booster expansion turbine out from middle part after heat exchanger heat exchange, lower tower is sent into after expansion;Another part enters The pressurized end for entering booster expansion turbine continues to be pressurized, and the heat exchange of board-like and high pressure liquid oxygen, the height after heat exchange are entered after cooling down again Lower tower is sent into after hydraulic fluid sky warp knuckle stream valve throttling.
After the preliminary rectifying of air tower under, liquid air, pure liquid nitrogen and liquid nitrogen fraction are obtained, and throttling is entered after cooler supercooling Upper tower.Jing after the further rectifying of upper tower, liquid oxygen is obtained in upper tower bottom, Jing after liquid oxygen pump compression plate type heat exchanger, re-heat are entered Cooling box afterwards, into oxygen pipe network.Another extraction send into liquid oxygen storage tank as liquid oxygen product after the supercooling of part liquid oxygen.
Liquid nitrogen is extracted out from lower top of tower, storage tank is entered as product after cooler supercooling.
The pressure nitrogen gas that lower top of tower is extracted out are divided into two parts, a part of cooling box Jing after plate type heat exchanger re-heat, then The supercharging of nitrogen expansion machine pressurized end is sent into, 8 kilograms is obtained and is obtained nitrogen, its small portion can be sent as product, and major part is sent into Plate type heat exchanger be cooled to after low temperature enter nitrogen expansion squeeze expanding end expansion, obtain low-temperature atmosphere-pressure gas gives as cold flow body After entering plate type heat exchanger re-heat, as normal pressure nitrogen product, user's Nitrogen pipe network is sent to when required, it is not necessary to when be sent to water Cold tower.Another part is sent as 4 kilograms of nitrogen products.
Dirty nitrogen is drawn from upper tower top be divided into two parts after cooler, plate type heat exchanger re-heat cooling box:A part Into the heater of molecular sieve system, used as regenerating molecular sieve gas, remaining dirty nitrogen removes water-cooling tower.
Normal pressure nitrogen is extracted out from upper top of tower, through cooler, plate type heat exchanger re-heat cooling box as reserved nitrogen product, Be sent to user's Nitrogen pipe network when required, it is not necessary to when be sent to water-cooling tower.
A certain amount of argon fraction is extracted in the middle part of upper tower and sends into crude argon column, crude argon column is divided in structure two sections, second segment The withdrawing fluid of crude argon tower bottom sends into first paragraph top Jing after liquid argon pump pressurization as phegma;Argon fraction Jing crude argon column rectifying After obtain thick liquid argon, and send into pure argon column middle part, obtain pure liquid argon in tower bottom Jing after pure argon column rectifying.

Claims (2)

1. compression air separation device in a kind of low energy consumption, it mainly by self-cleaning air filter, air compressor machine, molecular sieve purifier, Heat exchanger, low-temperature fractionating tower and connecting pipe are constituted, and raw air suction inlet is provided with before the self-cleaning air filter, Air compressor machine and air cooling tower are connected on behind self-cleaning air filter, behind the air cooling tower molecular sieve purifier is connected to;
Two-way air connecting tube is connected to behind molecular sieve purifier, all the way air connecting tube is connected to air booster to sky Gas continues to be pressurized, and another road air connecting tube is directly connected in plate type heat exchanger, and connects low temperature after plate type heat exchanger is picked out The lower tower of rectifying column;Described air booster picks out rear bifurcated and goes out two pipelines, a pipeline connecting plate type heat exchanger, and from The expanding end of booster expansion turbine is connected to after picking out in the middle part of plate type heat exchanger, after the expanding end cryogenic rectification is directly connected to The lower tower of tower;Another pipeline connects the pressurized end of booster expansion turbine, passes behind pipeline connecting plate type in the pressurized end and changes Hot device, picks out the lower tower for connecting low-temperature fractionating tower after plate type heat exchanger after a choke valve;
Described low-temperature fractionating tower is made up of the main condenser evaporimeter of Shang Ta and lower tower and centre, and in Xia Ta liquid is respectively arranged with Sky picks out that pipe, pure liquid nitrogen pick out pipe and liquid nitrogen fraction picks out pipe, and the liquid air picks out pipe, pure liquid nitrogen and picks out manages and liquid nitrogen fraction picks out pipe In the outer upper tower that low-temperature fractionating tower is connected to after a subcooler of tower, and the bottom of towe in upper tower is provided with liquid oxygen and picks out pipe, Jing Plate type heat exchanger is accessed after liquid oxygen pump, to be picked out access after plate type heat exchanger oxygen hose net or separately pick out liquid oxygen and is in charge of, through supercooling Connect liquid oxygen storage tank after device;
It is characterized in that the lower top of tower of the low-temperature fractionating tower is provided with pressure nitrogen gas picks out pipe, the pressure nitrogen gas pick out Guan Lian After being connected to plate type heat exchanger, the pressurized end of a nitrogen expansion machine is connected to through the plate type heat exchanger, is reconnected from the pressurized end Plate type heat exchanger, therefrom between pick out after be connected to the expanding end of nitrogen expansion machine, the expanding end is re-connected to board-like after picking out Heat exchanger, and the access tube pressure nitrogen after cold flow body heat exchange runner through the plate type heat exchanger, to space division offer cold.
2. compression air separation device in low energy consumption according to claim 1, it is characterised in that the supercharging of the nitrogen expansion machine End is tapped out and be pressurized all the way nitrogen pipeline, and the supercharging nitrogen pipeline is used as output pressure nitrogen product output pipe;
The lower top of tower of low-temperature fractionating tower is provided with liquid nitrogen and picks out pipe, through connecting subcooler liquid nitrogen product storage tank is connected to;
Argon fraction extraction opening is provided with the middle part of the upper tower of low-temperature fractionating tower, the argon fraction extraction opening is by pipe access crude argon Tower, is provided with thick liquid argon extraction opening on crude argon column, the thick liquid argon extraction opening is connected in succession pure argon column middle part by pipe, and in straight argon The tower bottom of tower is provided with pure liquid argon and picks out pipeline, the upper tower top of low-temperature fractionating tower is provided with dirty nitrogen and picks out pipe, passes through It is divided into two-way after connection subcooler and plate type heat exchanger, a pipeline is connected to the heater of molecular sieve purifier, another road connection Water-cooling tower;
The upper top of tower of low-temperature fractionating tower is provided with normal pressure nitrogen extraction opening, through pipe cooler and plate type heat exchanger are taken in succession After pick out to reserved nitrogen product pipeline, or connection user's Nitrogen pipe network, or connection water-cooling tower.
CN201620904821.2U 2016-08-19 2016-08-19 Compression air separation device in low energy consumption Active CN206176890U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106440659A (en) * 2016-08-19 2017-02-22 浙江智海化工设备工程有限公司 Low energy consumption inner compression air separation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106440659A (en) * 2016-08-19 2017-02-22 浙江智海化工设备工程有限公司 Low energy consumption inner compression air separation device

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