CN216845330U - Air separation nitrogen yield improving and optimizing device - Google Patents

Air separation nitrogen yield improving and optimizing device Download PDF

Info

Publication number
CN216845330U
CN216845330U CN202220430340.8U CN202220430340U CN216845330U CN 216845330 U CN216845330 U CN 216845330U CN 202220430340 U CN202220430340 U CN 202220430340U CN 216845330 U CN216845330 U CN 216845330U
Authority
CN
China
Prior art keywords
nitrogen
cooling tower
nitrogen gas
control valve
tower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202220430340.8U
Other languages
Chinese (zh)
Inventor
王旭东
赵宜方
王新
满明远
丰中田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lianhong Shandong Chemical Co ltd
Original Assignee
Lianhong Shandong Chemical Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lianhong Shandong Chemical Co ltd filed Critical Lianhong Shandong Chemical Co ltd
Priority to CN202220430340.8U priority Critical patent/CN216845330U/en
Application granted granted Critical
Publication of CN216845330U publication Critical patent/CN216845330U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04636—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a hybrid air separation unit, e.g. combined process by cryogenic separation and non-cryogenic separation techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04969—Retrofitting or revamping of an existing air fractionation unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/80—Processes or apparatus using other separation and/or other processing means using membrane, i.e. including a permeation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/42—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration

Abstract

The utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus, include: the device comprises an air separation rectifying tower, a plate heat exchanger, a water cooling tower, an air cooling tower, a refrigerating machine, a first control valve, a nitrogen compressor, a second control valve and a membrane separation device. Has the following advantages: 1. can realize the promotion of nitrogen gas output, and the flexible operation. When the nitrogen demand increases, newly increase nitrogen compressor, nitrogen membrane separator after, can improve empty low pressure nitrogen gas output that divides, satisfy low pressure nitrogen gas user demand, can ensure that nitrogen gas uses continuously stably. When the nitrogen demand is reduced, the operation of the membrane separation device is stopped. 2. The newly-added water chilling unit can ensure that the temperature of the chilled water reaches the operation index under the condition that the amount of heat exchange waste nitrogen of the water cooling tower is reduced.

Description

Air separation nitrogen yield improving and optimizing device
Technical Field
The utility model belongs to the technical field of empty nitrogen gas productivity technology that divides, concretely relates to empty nitrogen gas productivity promotes optimizing apparatus that divides.
Background
The nitrogen flow of the existing air separation device is as follows: after the air separation rectification is carried out in the air separation rectification tower, liquid nitrogen with the oxygen content less than 5ppm is extracted from the top of the lower tower, is reheated by a plate heat exchanger to become pressure nitrogen, and then is sent to a low-pressure nitrogen pipe network for use by low-pressure nitrogen in the whole plant.
In practical application, when the nitrogen demand is increased, the low-pressure nitrogen yield can not meet the nitrogen use demand; the current method for solving the problem of insufficient low-pressure nitrogen yield mostly adopts liquid nitrogen vaporization for a low-pressure nitrogen pipe network or adds a set of nitrogen preparation air separation device or improves the nitrogen yield by reforming a cold box rectifying tower.
The above-described processing method has the following problems:
a set of air separation device for preparing nitrogen is additionally arranged, so that a large land area is occupied, a large amount of capital, manpower and material resources are consumed, and the energy consumption is greatly increased after the additionally arranged device is operated; if the low-pressure nitrogen is used by adopting liquid nitrogen vaporization, the liquid nitrogen needs to be purchased continuously and is restricted by market environment, and the safety and stability of a production system cannot be ensured; the scheme of reforming transform rectifying column needs to carry out the sand raking and reform transform the processing to the cold box, and is great to current air separation plant influence, and the parking cycle is longer, and the recessive cost is very high.
SUMMERY OF THE UTILITY MODEL
To the defect that prior art exists, the utility model provides an empty nitrogen gas productivity promotes optimizing apparatus that divides can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus, include: the device comprises an air separation rectifying tower (1), a plate heat exchanger (2), a water cooling tower (3), an air cooling tower (4), a refrigerator (5), a first control valve (6), a nitrogen compressor (7), a second control valve (8) and a membrane separation device (9);
a first waste nitrogen discharge pipeline (L1) of the air separation rectifying tower (1) is communicated with a waste nitrogen inlet of the plate heat exchanger (2); a waste nitrogen outlet of the plate heat exchanger (2) is communicated to a waste nitrogen inlet of the water cooling tower (3) through a second waste nitrogen discharge pipeline (L2), and a waste nitrogen outlet is arranged at the top of the water cooling tower (3); a chilled water outlet of the water cooling tower (3) is communicated to a chilled water inlet of the air cooling tower (4) through a chilled water pipeline (L3); an inlet of the freezer (5) communicates with an upstream side of the chilled water line (L3); an outlet of the freezer (5) communicates with a downstream side of the chilled water line (L3);
one path is led out from the second sewage nitrogen gas discharge pipeline (L2) and communicated to the gas inlet of the nitrogen gas compressor (7) after passing through a first control valve (6); the gas outlet of the nitrogen compressor (7) is communicated to the gas inlet of the membrane separation device (9) after passing through the second control valve (8); and the air outlet of the membrane separation device (9) is communicated with a nitrogen pipe network.
Preferably, the first nitrogen waste discharge line (L1) is led out from the top of the upper tower of the space distillation rectification tower (1).
The utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus has following advantage:
1. can realize the promotion of nitrogen gas output, and the flexible operation.
When the nitrogen demand increases, newly increase nitrogen compressor, nitrogen membrane separator after, can improve empty low pressure nitrogen gas output that divides, satisfy low pressure nitrogen gas user demand, can ensure that nitrogen gas uses continuously stably. When the nitrogen demand is reduced, the operation of the membrane separation device is stopped.
2. The newly-added water chilling unit can ensure that the temperature of the chilled water reaches the operation index under the condition that the amount of heat exchange waste nitrogen of the water cooling tower is reduced.
Drawings
Fig. 1 is the utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus's schematic structure diagram.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus, include: the system comprises an air separation rectifying tower 1, a plate heat exchanger 2, a water cooling tower 3, an air cooling tower 4, a refrigerator 5, a first control valve 6, a nitrogen compressor 7, a second control valve 8 and a membrane separation device 9;
a first waste nitrogen gas discharge line L1 is led out from the top of the upper part of the air distillation column 1.
A first waste nitrogen gas discharge pipeline L1 of the air separation rectifying tower 1 is communicated to a waste nitrogen gas inlet of the plate heat exchanger 2; a waste nitrogen outlet of the plate heat exchanger 2 is communicated to a waste nitrogen inlet of the water cooling tower 3 through a second waste nitrogen discharge pipeline L2, and the top of the water cooling tower 3 is a waste nitrogen outlet; the chilled water outlet of the water cooling tower 3 is communicated to the chilled water inlet of the air cooling tower 4 through a chilled water pipeline L3; the water inlet of the freezer 5 communicates with the upstream side of the chilled water line L3; the water outlet of the refrigerator 5 communicates with the downstream side of the chilled water line L3;
one way is led out from a second sewage nitrogen gas discharge pipeline L2 and communicated to the gas inlet of a nitrogen gas compressor 7 after passing through a first control valve 6; the gas outlet of the nitrogen compressor 7 is communicated to the gas inlet of the membrane separation device 9 after passing through the second control valve 8; the gas outlet of the membrane separation device 9 is communicated with a nitrogen pipe network.
The utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus, its theory of operation is:
when the nitrogen demand is low
When the nitrogen demand is low, additional nitrogen production by the apparatus provided herein is not required. At this time, the first control valve 6 and the second control valve 8 are closed. The nitrogen compressor 7 and the membrane separation device 9 are in a stopped state.
Extracting a large amount of waste nitrogen with oxygen content less than 1% from the top of an upper tower of an air separation rectifying tower 1, wherein the temperature of the waste nitrogen is about-192 ℃, and the waste nitrogen enters a plate heat exchanger 2 for heat exchange, and the temperature of the waste nitrogen is about 20 ℃; then enters a water cooling tower 3 to exchange heat with the chilled water and is discharged from the top of the water cooling tower 3; cooling the water in the water cooling tower 3 to form chilled water at the temperature of 8-14 ℃, and conveying the chilled water to the air cooling tower 4 through a chilled water pipeline L3; in the air cooling tower, high-temperature compressed air exchanges heat with chilled water, and the cooled air is discharged from the air cooling tower and conveyed to the next-stage equipment.
Under the working condition, because a sufficient amount of waste nitrogen can be extracted from the top of the upper tower of the air separation rectifying tower 1 to be used as a cold medium, the temperature of the chilled water output by the water cooling tower 3 can meet the requirement, and the refrigerator 5 does not need to be started.
(II) when the nitrogen demand is higher
When the nitrogen demand is high, the refrigerator 5, the first control valve 6, and the second control valve 8 are opened, and the nitrogen compressor 7 and the membrane separation device 9 are in an operating state.
Extracting a large amount of waste nitrogen with oxygen content less than 1% from the top of an upper tower of an air separation rectifying tower 1, wherein the temperature of the waste nitrogen is about minus 192 ℃, and entering a plate heat exchanger 2 for heat exchange;
the waste nitrogen output from the plate heat exchanger 2 is divided into two branches, one branch enters the water cooling tower 3 to be used as a cold medium, the cold medium exchanges heat with water, and the temperature of the water is reduced to form chilled water. At this time, since the amount of the waste nitrogen gas entering the water cooling tower 3 becomes small, in order to ensure that chilled water meeting the low temperature requirement is obtained, the refrigerator 5 needs to be started to further cool the water output by the water cooling tower 3, so as to obtain chilled water meeting the use requirement of the air cooling tower 4.
The other branch enters a nitrogen compressor 7 through a first control valve 6, is compressed by the nitrogen compressor 7 and then enters a membrane separation device 9 through a second control valve 8, the polluted nitrogen is further purified, oxygen components in the polluted nitrogen are removed, the index of nitrogen demand is reached, and pure nitrogen is obtained; pure nitrogen is sent into a nitrogen pipe network to meet the use requirement of low-pressure nitrogen.
Therefore, the utility model provides an air separation nitrogen yield promotion optimizing device, when the nitrogen gas consumption increases, dirty nitrogen gas is led out all the way through the high-pressure plate type water cooling tower pipeline and is provided with a valve, and the inlet of a nitrogen compressor is connected behind the valve; the outlet of the nitrogen compressor is connected with a membrane separation device, and a nitrogen pipeline at the outlet of the membrane separation device is connected with a low-pressure nitrogen pipeline network. The newly added refrigerating machine supplements the refrigerating capacity of the water cooling tower for losing the polluted nitrogen. And stopping the membrane separation device after the nitrogen demand is reduced, and recovering the air separation nitrogen production system.
The utility model provides an empty nitrogen gas productivity that divides promotes optimizing apparatus has following advantage:
1. can realize the promotion of nitrogen gas output, and the flexible operation.
When the nitrogen demand increases, newly increase nitrogen compressor, nitrogen membrane separator after, can improve empty low pressure nitrogen gas output that divides, satisfy low pressure nitrogen gas user demand, can ensure that nitrogen gas uses continuously stably. When the nitrogen demand is reduced, the operation of the membrane separation device is stopped.
2. The newly-added water chilling unit can ensure that the temperature of the chilled water reaches the operation index under the condition that the amount of heat exchange waste nitrogen of the water cooling tower is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.

Claims (2)

1. The utility model provides an empty nitrogen gas productivity promotes optimizing apparatus which characterized in that includes: the device comprises an air separation rectifying tower (1), a plate heat exchanger (2), a water cooling tower (3), an air cooling tower (4), a refrigerator (5), a first control valve (6), a nitrogen compressor (7), a second control valve (8) and a membrane separation device (9);
a first waste nitrogen discharge pipeline (L1) of the air separation rectifying tower (1) is communicated with a waste nitrogen inlet of the plate heat exchanger (2); a waste nitrogen outlet of the plate heat exchanger (2) is communicated to a waste nitrogen inlet of the water cooling tower (3) through a second waste nitrogen discharge pipeline (L2), and a waste nitrogen outlet is arranged at the top of the water cooling tower (3); a chilled water outlet of the water cooling tower (3) is communicated to a chilled water inlet of the air cooling tower (4) through a chilled water pipeline (L3); an inlet of the freezer (5) communicates with an upstream side of the chilled water line (L3); an outlet of the freezer (5) communicates with a downstream side of the chilled water line (L3);
one path is led out from the second sewage nitrogen gas discharge pipeline (L2) and communicated to the gas inlet of the nitrogen gas compressor (7) after passing through a first control valve (6); the gas outlet of the nitrogen compressor (7) is communicated to the gas inlet of the membrane separation device (9) after passing through the second control valve (8); and the air outlet of the membrane separation device (9) is communicated with a nitrogen pipe network.
2. The device for optimizing the improvement of the air separation nitrogen energy production according to claim 1, characterized in that the first waste nitrogen gas discharge line (L1) is led out from the upper tower top of the air separation rectification tower (1).
CN202220430340.8U 2022-03-01 2022-03-01 Air separation nitrogen yield improving and optimizing device Active CN216845330U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220430340.8U CN216845330U (en) 2022-03-01 2022-03-01 Air separation nitrogen yield improving and optimizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220430340.8U CN216845330U (en) 2022-03-01 2022-03-01 Air separation nitrogen yield improving and optimizing device

Publications (1)

Publication Number Publication Date
CN216845330U true CN216845330U (en) 2022-06-28

Family

ID=82092222

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220430340.8U Active CN216845330U (en) 2022-03-01 2022-03-01 Air separation nitrogen yield improving and optimizing device

Country Status (1)

Country Link
CN (1) CN216845330U (en)

Similar Documents

Publication Publication Date Title
CN100363699C (en) Air separation system for recycling cold energy of liquified natural gas
CN202675796U (en) Device utilizing liquefied Natural Gas (LNG) cold energy to produce liquid air separation products
CN109140903B (en) Air separation system and air separation method utilizing cold energy of liquefied natural gas
CN104110940A (en) Efficient air separation device utilizing liquefied natural gas cold energy
CN106440659A (en) Low energy consumption inner compression air separation device
CN206176890U (en) Compression air separation device in low energy consumption
CN201532078U (en) Air separating system using liquefied natural gas cold energy
CN101915495B (en) Full liquid-air separation unit using liquefied natural gas cold energy and method thereof
CN201852409U (en) Air separation system utilizing liquefied natural gas (LNG) cold energy
CN201607093U (en) Device for recovering liquefied carbon dioxide in petrochemical tail gas
CN216845330U (en) Air separation nitrogen yield improving and optimizing device
CN114518016A (en) Carbon dioxide capturing, liquefying and recycling device and method
CN204923686U (en) Low -purity oxygen air separation's device
CN204240703U (en) A kind of efficient air separation unit utilizing cold energy of liquefied natural gas
CN203534056U (en) Device for increasing nitrogen-to-oxygen ratio of air separation unit
CN105115244A (en) Low-purity oxygen air separating device and method
CN201876055U (en) Full-liquid air separation device using cold energy of liquefied natural gas
CN114216301B (en) Device and method for cryogenic separation and production of high-purity liquid nitrogen
CN111707054A (en) Air separation cold energy recovery system
CN112556312A (en) Steam-driven air separation method and steam T-stage utilization system for same
CN110487023A (en) A method of liquid nitrogen is produced using LNG cold energy
CN205243875U (en) Adopt centrifugal ammonia compressor that double -cylinder compression three -section was admitted air to organize
CN217187961U (en) Olefin separation propylene optimizing system
CN203824225U (en) Air separation unit capable of being matched with cold energy supply of receiving station
CN210486276U (en) Natural gas process system liquefied in high-pressure injection mode

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant