CN101817718A - Technique for preparing propane at low temperature - Google Patents

Technique for preparing propane at low temperature Download PDF

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Publication number
CN101817718A
CN101817718A CN201010169500A CN201010169500A CN101817718A CN 101817718 A CN101817718 A CN 101817718A CN 201010169500 A CN201010169500 A CN 201010169500A CN 201010169500 A CN201010169500 A CN 201010169500A CN 101817718 A CN101817718 A CN 101817718A
Authority
CN
China
Prior art keywords
low temperature
propane
technique
heat exchanger
interchanger
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.)
Pending
Application number
CN201010169500A
Other languages
Chinese (zh)
Inventor
李中元
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.)
TH GASES CO Ltd
Original Assignee
TH GASES 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 TH GASES CO Ltd filed Critical TH GASES CO Ltd
Priority to CN201010169500A priority Critical patent/CN101817718A/en
Publication of CN101817718A publication Critical patent/CN101817718A/en
Pending legal-status Critical Current

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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
    • F25J3/0204—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 characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • 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
    • F25J3/0228—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 characterised by the separated product stream
    • F25J3/0233—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 characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • 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
    • F25J3/0228—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 characterised by the separated product stream
    • F25J3/0242—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 characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
    • 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
    • F25J3/0228—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 characterised by the separated product stream
    • F25J3/0247—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 characterised by the separated product stream separation of CnHm with 4 carbon atoms or more
    • 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
    • F25J3/0228—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 characterised by the separated product stream
    • F25J3/0257—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 characterised by the separated product stream separation of 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • 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
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention discloses a technique for preparing propane at low temperature. The invention adopts the structure that an upper heat exchanger, a lower heat exchanger, a heavy hydrocarbon separator, a denitriding column, a middle heat exchanger, a right heat exchanger and a deethanizing column are mainly assembled through connecting pipelines according to system functions. The technique for preparing propane at low temperature has the advantages of reasonable design and convenient use, and is an ideal technique for preparing propane.

Description

The technology of preparing propane at low temperature
Affiliated technical field
The present invention relates to a kind of technology of technology, particularly a kind of preparing propane at low temperature of production propane of organic synthesis industry, be suitable for the synthetic propane of chemical industry.
Background technology
At present, propane is the important source material of organic synthesis industry, and Application Areas is extensive, but the production technology complexity, the cost height, quality product is also relatively poor.
Summary of the invention
Problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of technology of preparing propane at low temperature is provided.This technology not only technology is reasonable, and preparation is simple, and raw material is easy to get, and does not produce by product, product yield height, raw material availability height.
The technical solution used in the present invention is: upward interchanger, following interchanger, heavy hydrocarbon separator, denitrification column, intermediate heat, right interchanger, deethanizing column are assembled into one by connection line by its system function and constitute.
During use, unstripped gas is pressurized to about 10MPa, at first by high pressure adsorbing and removing sour gas (H 2S and CO 2), make C through precooling again 3Above hydro carbons condensation also separates and removes, rectifying in denitrification column then, and nonhydrocarbon low boiling components such as nitrogen helium are removed from the cat head separation, are the liquid methane that contains a small amount of ethane at the bottom of the tower.Liquid methane enters deethanizing column and continues rectifying, obtains highly purified methane product at cat head, reclaims ethane at the bottom of the tower.With C 3Above hydro carbons adopts general compression rectification to separate just can obtain pure propane.After adopting preparation method of the present invention, solved, produced propane gas simultaneously, createed economic benefits in the process safe problem of handling Sweet natural gas.
The invention has the beneficial effects as follows, reasonable in design, easy to use, be ideal propane fabricating technology.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Accompanying drawing number is: 1, go up interchanger, 2, interchanger down, 3, the heavy hydrocarbon separator, 4, denitrification column, 5, intermediate heat, 6, right interchanger, 7, deethanizing column, 8, connection line.
Embodiment
With reference to Fig. 1, last interchanger (1), following interchanger (2), heavy hydrocarbon separator (3), denitrification column (4), intermediate heat (5), right interchanger (6), deethanizing column (7) are assembled into one by connection line (8) by its system function and constitute.
During use, unstripped gas is pressurized to about 10MPa, at first by high pressure adsorbing and removing sour gas (H 2S and CO 2), make C through precooling again 3Above hydro carbons condensation also separates and removes, rectifying in denitrification column (4) then, and nonhydrocarbon low boiling components such as nitrogen helium are removed from the cat head separation, are the liquid methane that contains a small amount of ethane at the bottom of the tower.Liquid methane enters deethanizing column (7) and continues rectifying, obtains highly purified methane product at cat head, reclaims ethane at the bottom of the tower.With C 3Above hydro carbons adopts general compression rectification to separate just can obtain pure propane.After adopting preparation method of the present invention, solved, produced propane gas simultaneously, createed economic benefits in the process safe problem of handling Sweet natural gas.

Claims (1)

1. the technology of a preparing propane at low temperature is characterized in that: go up interchanger, descend interchanger, heavy hydrocarbon separator, denitrification column, intermediate heat, right interchanger, deethanizing column to be assembled into one by connection line by its system function and to constitute.
CN201010169500A 2010-05-12 2010-05-12 Technique for preparing propane at low temperature Pending CN101817718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010169500A CN101817718A (en) 2010-05-12 2010-05-12 Technique for preparing propane at low temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010169500A CN101817718A (en) 2010-05-12 2010-05-12 Technique for preparing propane at low temperature

Publications (1)

Publication Number Publication Date
CN101817718A true CN101817718A (en) 2010-09-01

Family

ID=42653019

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010169500A Pending CN101817718A (en) 2010-05-12 2010-05-12 Technique for preparing propane at low temperature

Country Status (1)

Country Link
CN (1) CN101817718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839649A (en) * 2017-02-13 2017-06-13 重庆耐德能源装备集成有限公司 The liquefying device and method of a kind of natural gas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986242A (en) * 1963-03-06 1965-03-17 British Oxygen Co Ltd Low temperature separation of methane from gas mixtures
US4323380A (en) * 1979-08-10 1982-04-06 Linde Aktiengesellschaft Rectification of gaseous mixtures
CN1039576A (en) * 1988-01-28 1990-02-14 林德股份公司 The technology of separating hydrocarbons and equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986242A (en) * 1963-03-06 1965-03-17 British Oxygen Co Ltd Low temperature separation of methane from gas mixtures
US4323380A (en) * 1979-08-10 1982-04-06 Linde Aktiengesellschaft Rectification of gaseous mixtures
CN1039576A (en) * 1988-01-28 1990-02-14 林德股份公司 The technology of separating hydrocarbons and equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106839649A (en) * 2017-02-13 2017-06-13 重庆耐德能源装备集成有限公司 The liquefying device and method of a kind of natural gas

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Application publication date: 20100901